Food Grade Plastic

Food Grade plastic

7 Types of Food-Grade and Food-Safe Plastics

As far as food safety is concerned, information concerning packaging and storage materials is important. Not all plastics are safe for food contact. So, it is crucial to learn about food-safe plastics. Some insights on making the right choice can go a long way in improving both health and food quality. In this article, you will find out what food-grade and food-safe plastics mean, their main characteristics, the legislation governing them, and their main uses.

What is Food Grade?

Food contact material is safe to use in direct contact with food. These materials have no bitter taste that may affect the food and are included in packaging, cutleries, etc. An economic view of food-grade material is that such items cannot be used in food production if they don’t meet some requirements from authorities, i.e. FDA approval plastics.

What is Food-Grade Plastics?

Food-grade plastics are special plastic types certified by food-contact administrative bodies to come into contact with food. They are subjected to rigors to check their ability to contaminate foods with chemicals or toxins.

Food-Grade plastics

What is Food-Safe Plastics?

Food-safe plastics can be defined as plastics with features and characteristics that make handling, storage, or transportation of food possible. It should be noted these plastics do not disintegrate easily or leach out toxic chemicals when exposed to food, heat, or moisture.

Food-Safe vs. Food-Grade

For “food-safe,” which means that a material is safe for food contact under conditions that are considered standard, “food-grade” means that the material is compliant with the FDA or other regulating bodies. All food-contact plastics are food-safe but not all food-safe materials qualify classified as food-grade.

All You Need to Understand About BPA

Bisphenol A or BPA is a compound used in plastics that can migrate to foods or drinks. Research indicates that BPA may pose some dangers if ingested, therefore; various authorities have sought to limit the use of this chemical in food contact applications. We should pay attention to plastic food wraps labeled as ‘food-grade’ containing BPA, which should be eliminated.

Methods of manufacturing food grade plastic products

The food-grade plastic products require the correct type of direct material, preventive measures against contamination, and a proper processing method. Here’s a breakdown of how to produce food-grade plastic products:

FDA food grade plastic

1. Selection of Raw Materials

The process starts with procuring the best raw materials chosen to meet the actual and required food safety standards. It must not contain chemicals that are toxic and can migrate into foods, examples of this chemical include Bisphenol A (BPA) and phthalates. Plastics allowed include those that meet this status at the international, federal, or state level, i.e. United States Food and Drug Administration (US-FDA) approved plastics are used. Some familiar Food Grade Plastics may include PET, HDPE, PP, and LDPE.

2. Compliance with regulatory standards.

Manufacturers need to ensure that the materials of plastic and additives used are safe for use with foods as identified by the FDA (United States) and the EFSA (Europe). They test to ascertain that no dangerous migratory substances are present on the materials for transfer into food. Food-contact plastics standards, i.e., insist on the purity and composition of the material before the FDA allows them to be used for food storage or packing.

3. Good Manufacturing Practises (GMP)

Production of food-grade plastics involves the adherence to good manufacturing practices (GMP). GMP includes cleanliness, keeping all parts and processes uncontaminated, and cleaning the machines and equipment. This implies that the firm has control over the introduction of raw materials through to the packaging of the final product.

Food-Grade plastic material

Key GMP principles include:

  • Proper Facility Maintenance: Production facilities should be clean and they should not have any contaminants at all.
  • Machine Sterilization: Equipment used for production purposes is always cleaned to eliminate any possible cross-linking with diseases.
  • Employee Hygiene and Training: Employees in the manufacturing of food-grade plastics are trained to handle the product appropriately together with cleanliness.

4. Blow Molding Injection Molding or Extrusion

Outputs start with the selection and quality control of raw materials. Here the plastic is formed by processes such as injection molding or extrusion.

  • Injection Molding: These plastic pellets are melted by heating, and then forced into molds which form containers, bottles, or other shapes.
  • Extrusion: Plastic use involves melting and extruding through a die to form continuous structures common as sheets and films.

Both fabrication techniques ensure accuracy in dimensionality plastic thickness, and strength, which is important for food compliance.

Food safety plastics

5. Testing for Safety and Compliance

Plastic products go through various tests to meet the necessary safety standards. These tests determine the efficiency of chemical leaching, thermal stability, and the service life of the conditioned vegetable oil. Food-contact plastics do not chemically interact with the food-contacting surfaces, and should not be damaged by heat. Besides this, they should not degrade and leach out any dangerous chemicals.

Some of the tests include:

  • Migration Testing: Make sure that the specific chemical migrates into food to an extent not greater than the allowable level even under the stated conditions like heating or freezing.
  • Strength and Durability Testing: Checks for plastic toughness to determine if it will not break or dematerialize.

6. Labeling and Certification

When the food-grade plastic meets all safety and compliance requirements, it gets its official labels. Customers and regulatory bodies such as FDA offer accreditation, to products that work to specified safety measures. Manufacturers like to add claims such as ‘BPA free,’ ‘FDA approved,’ or the recycling symbol that denotes the type of plastic, i.e. 1 for PET, and 2 for HDPE. These labels assist the customer in differentiating between the safety and the appropriateness of the product for food use.

7. Sustainability and Recyclability

Recent years have improved attempts at keeping up with sustainability in food-grade plastics production. Increased consumer awareness is creating pressure on most manufacturers to adopt either post-use-recycled plastic material, i.e. food grade, or look for biodegradable plastics. That is why, ensuring that food-grade plastics are recyclable and are friendly to the environment is an essential factor today.

FDA grade plastic

7 Types of Food-Grade Plastics

Here are some common types of plastics we can use as Food-Grade and Food-Safe;

1. Polyethylene Terephthalate  (PET or PETE)

PET is generally used to make water and soda bottles and food containers, i.e. peanut butter jars. It is light, tough, and very effective in barring moisture hence its use in packaging. PET is also (ed code: 1) highly recyclable but is best used only once as it may degrade if used continually.

2. High-Density Polyethylene (HDPE)

HDPE is used in milk jugs, juice containers, and grocery carry bags. It is non-breakable, hard-wearing, chemical and shock resistant, and it is food safe as it does not contaminate food products. HDPE is a flow category, it is also recyclable material and marked by recycling code “2”.

food grade container

3. Polyvinyl Chloride (PVC)

We can use PVC in containers but avoid it in high-heat applications because it releases toxic chemicals. It is more robust but used least in food preservation particularly where heating is needed and is stamped with code “3.” PVC are mostly used for pipe fitting mold. click here to know more about PVC pipe fitting injection molding.

4. Low-Density Poly Ethylene (LDPE)

Examples of products that use LDPE include; bread and frozen food bags and some flexible packaging. This material is light, versatile, and does not absorb moisture. Therefore it can be used to store foods. Besides this, LDPE is recyclable with the code “4”, but it gets recycled more rarely than other materials.

5. Polypropylene (PP)

PP is most commonly used in yogurt cups, disposable and reusable straws, caps of soda, and beer bottles. That is why, it is heat resistant and suitable for food packaging or products that can be heated in a microwave. PP is safe, durable, and recyclable with code ‘5’. Go to is polypropylene injection molding page to know more about this PP material.

Food grade plastic part

6. Polystyrene (PS)

PS is applied as disposable forks, spoons, knives, cups, and plates. It may be lightweight and affordable, but it’s not the best material for long-term food storage because of fears of chemical leaching, especially when exposed to heat. It’s marked with code “6.” Go to PS injection molding page to know more.

7. Polycarbonate (PC)

It is used in reusable water bottles and food storage containers. It may include BPA, a chemical capable of causing health effects. While these materials are strong and transparent, we should pay extra attention not to using products that include BPA. Furthermore, the PC is noted with recycling code 7. Go to polycarbonate injection molding page to know more.

7 typs of food grade plastic

Key Properties Of 7 Types of Food-Grade Plastics

Here are some important types of plastic along with their properties and applications in different industries;

Plastic Type Recycling Code Common Uses Durability Heat Resistance Chemical Resistance BPA-Free Recyclability
Polyethylene Terephthalate (PET or PETE) 1 Beverage bottles, food jars High Low Moderate Yes High
High-Density Polyethylene (HDPE) 2 Milk jugs, juice bottles, grocery bags Very High Moderate High Yes High
Polyvinyl Chloride (PVC) 3 Cling wraps, food containers Moderate Low Moderate Can contain BPA Low
Low-Density Polyethylene (LDPE) 4 Bread bags, frozen food bags, containers Moderate Low High Yes Low
Polypropylene (PP) 5 Yogurt containers, bottle caps, straws High High Very High Yes Moderate
Polystyrene (PS) 6 Disposable cups, cutlery, plates Moderate Low Low Can contain BPA Low
Polycarbonate (PC) 7 Reusable bottles, food storage Very High High High Can contain BPA Low

 

Five Prominent Features of Food-Safe Plastics;

The following are key features of Food-safe and Food-grade plastics;

  1. BPA-free and toxin-free
  2. Heat-resistant and durable
  3. Inert to food substances
  4. Odorless and tasteless
  5. Authorized by regulatory authorities (FDA food plastics, EU, etc.)

 

Are there any plastic food bottles Safe?

Yes, food-grade plastic bottles and containers are safe to use for human consumption as long as they have been properly washed up, non-BPA type. FDA must approve such product and it should not be damaged over time.

FDA food grade material

 

Plastic Numbers  Safe for Food Storage

Recyclable plastic types one, two, four, and five, i.e. PET, HDPE, LDPE, and PP are safe for storing foods. Eschew plastics that have a code 3 (PVC), 6 (PS), and 7 (Other) since these plastics contain BPA and other unfriendly chemicals.

FDA food grade plastic spoon

Safe Plastics Number Chart for Food-Grade Plastic

The following table will help us understand what Fodd-Grade plastics are Food-Safe as well;

Plastic Type Safe for Food Contact? Common Use Cases
1 (PET or PETE) Yes Water bottles, containers
2 (HDPE) Yes Milk jugs, juice bottles
3 (PVC) No Cling wraps, containers
4 (LDPE) Yes Bread bags, frozen food bags
5 (PP) Yes Yogurt containers, bottle caps
6 (PS) No Disposable plates, cups
7 (Other) Depends (avoid BPA) Miscellaneous items

Applications for Food Grade and Food Safe Plastics

Here are some common applications of Foof-Grade and Food-Safe plastics;

  • Laboratory consumables such as food trays and food packing materials
  • Beverage bottles
  • Utensils and cutlery
  • Paper bags and foils
  • Industrial Applications Food Processing Equipment

Benefits of Food-Grade and Food-Safe Plastics

Let’s discuss some pros of Food-Grade and Food Safe plastics;

  1. Inexpensive and easy to manage
  2. Durable and shatter-resistant
  3. Resistant to contamination
  4. Versatile and easy to mold
  5. Reusable (if the type of disposable product is taken into consideration)

Food grade containers

Disadvantages of Food-Grade and Food-Safe Plastics

Here are some cons/limitations of Food-Grade and Food-Safe Plastics

  1. Potential for environmental harm (plastic waste)
  2. Some plastics can hardly be disposed of when heated – they emit toxic substances.
  3. Though most are designed to be shop-safe, not all are microwave or dishwasher-safe.
  4. Some have limited alternatives for recycling.
  5. Long-term durability may vary.

Conclusion

In conclusion, Food-grade and food-safe plastics are important components in the food industry’s packaging and preservation solutions. General knowledge of the type of plastic used and the recognition of environmentally friendly products are critical to health and safety. The food and beverages stored will be protected from being contaminated by using BPA-free, FDA food plastics whenever you select them.

Frequently Asked Questions

What does “food grade” mean?

Food-grade means that plastic material can be relayed to the food and it is compliant with legal requirements.

Are BPA-free plastics always safe for food storage?

Yes, BPA-free plastics are a little safer but then make sure that these plastics that you use are food-grade ones.

Can I use any plastic container for food storage?

No, only use containers marked as food-grade or food-safe on their surfaces.

Can the same plastic containers be used again?

Yes, if they are freshly packed, hygienically stored, and in a food contact permissible material. If it’s worn or cracked then recommended not to use it.

What kind of plastic is better for storing food for a longer period?

HDPE and PP plastics are safe for long-term use due to the material’s rigidity and lack of potential chemical reactions.

Why should I avoid plastics labeled with 3, 6, and 7?

These plastics have been known to release pathogens like BPA through heat and moisture impacts.

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Die Casting Mold Design And Production Guide

Die-casting mold

We often need metal parts in various shapes. We use them in our cars, houses, machines, and other infrastructures. Have you wondered how it is possible to make such a detailed shape? Die Casting mold tech has revolutionized our lives. With this method, you can create complex shapes and patterns. Die-casting mold parts are widely prevalent in a wide range of applications.

In this article, we will learn some fundamentals about die-casting mold. In addition, it’s gonna be an excellent guide for those looking for the best die-casting services. You will learn how foundries make die-casting molds. So, sit tight and read this article thoroughly.

die casting mold

Overview of Die Casting

Die Casting is a famous type of metal casting process. As the name implies, this method typically uses specific dies for the job. The shape of the final metal part depends on the shape of the dies. Although there are different types of die casting, the base technology is the same for all. The material used for making these molds is hardened tool steel.

Die casting has a long history. People invented this tech in 1838. In the early times, this application was only for printing purposes. Later, as technology developed, people usually learned how to use this method to create various complex metal parts. Die casting offers several benefits.

  • Die-casting mold typically offers high production efficiency. This part is comparatively faster than other permanent mold casting processes. As a result, you can create hundreds of metal parts in less time.
  • Die-casting mold parts usually come with a smooth surface finish. For HPDC metal parts, this is more obvious. As a result, you might not need additional machining services.
  • The die-casting method is versatile. It generally works with many metals, including aluminum, zinc, and magnesium.
  • Since this method is fast, it generally reduces production costs. Although creating the dies may be expensive, this method is cheaper in the long run.
  • Die-casting mold parts are widely prevalent in many industries. This method makes your car’s engine, gearbox, and structural parts. You may also find similar applications in other sectors as well.

Different Types of Die Casting

Die casting typically has six major types, each with its own perks. Each type is suitably suited to specific applications. Let’s look at their particular technology and product use.

Type #1 HPDC (High Pressure Die Casting)

As the name suggests, this die-casting method requires high pressure for the job. This high pressure die casting technically pushes the molten metal to every mold corner. As a result, you can get very precise metal parts.

In the car industry, engine blocks and gearbox castings are made of high-quality HPDC aluminum parts. Various equipment and infusion pumps are noteworthy in the medical industry. Besides, many aircraft components also need HPDC casting metal parts.

Type #2 LPDC (Low-Pressure Die Casting)

This die-casting method is just the opposite of HPDC. It involves low pressure, typically ranging from 2 to 15 psi. The process is almost similar, but it is generally slower than HPDC. Since it is slow, you can easily control the movement of the molten metal.

LPDC metal parts are widely prevalent for car wheels, cylinder heads, and suspension systems.

Type #3 Gravity Die Casting

This die-casting method uses gravitational force to fill the mold with molten metal. The process typically pours the molten metal into the mold from above, and the liquid flows downwards. It is simple and cheap because it doesn’t need additional forces.

The gravity die-casting method is prevalent in making pipe fittings and various cookware.

Type #4 Vacuum Die Casting

As the name suggests, this casting method involves creating a vacuum environment. It does this before inserting the molten metal. As a result, you don’t get any casting defects caused by trapped gas inside.

Vacuum die casting is suitable for making delicate components. Electronic castings, aircraft parts, and some automotive parts are noteworthy examples.

Type #5 Squeeze Die Casting

Squeeze die casting combines casting and forging. After injecting the molten metal inside the mold, the process applies high pressure during solidifying. Squeeze pressure mainly reduces the porosity defects.

Squeeze die casting is widely popular because of the high strength and density of the metal parts. Some common examples are suspension parts, brackets, and some building components.

Type #6 Semi Solid Die Casting

This process also combines casting and forging. The only difference is that this process uses semi-solid metals. It looks like a slurry consistency. SMDC is highly popular for making many car parts, electronic housing, and medical devices. go to simi solid aluminum die casting page to know more.

What is Die Casting Mold?

The tool used in the die-casting method is generally called a die-casting mold. People also call it a die-casting tool. The process of making this tool is known as die-casting tooling.

The definition says that a die-casting mold is a unique tool used in the die-casting process. Its primary purpose is to shape molten metal into desired forms. In most cases, they generally come with two halves: the fixed and moving die half.

When both halves are closed, they form a cavity inside that mimics the desired part’s shape. A high-quality die-cast mould is essential to ensure the highest accuracy of your finished metal parts. However, there are several components:

Mold Cavity

The hollow space inside a Mold is generally the mold cavity. It actually gives the shape and size of the final metal part. The molten metal is injected into this cavity and solidifies to get the desired form. Note that you must ensure high precision when making this cavity.

Core Pin Die Casting Mold

The core is another vital component of a die-casting mold. It creates features in casting, such as holes or recesses. It mainly creates complex geometries within the metal part. However, depending on the requirements, you can make it using sand or metal. Note that this core must withstand high pressure and temperature during operation.

Ejector Pins

As the name implies, these pins basically eject the movable die-cast mold half from the fixed one. During the design process, engineers carefully place them where they can apply even pressure. The correct design always ensures that the part is not damaged.

Runner System

The runner generally channels the molten metal into the mold cavity. It consists of several tracks that go to different parts of the mold. Proper runner system design is crucial for even distributing molten metal. Overall, an adequate runner system significantly reduces defects.

Overflow System

The overflow system collects excess molten metal during the injection process. As a result, the system can prevent defects caused by trapped air. Note that this system may not be present for some die-casting molds.

Others

Elements like bolts and pins hold the die-cast mold system together. These parts need to be strong and carefully machined. The die-casting method requires high pressure, gas pressure, and heat. Choosing the right materials is crucial to keeping these parts in good shape.

Die Casting Mold Material: Hardened Tool Steel

Hardened tool steel is a general type of steel. It has various grades suitable for specific use. You can achieve steel’s high hardness and strength by the heat-treatment method. However, why are these tool steels so popular?

First, they offer high wear resistance. Second, their toughness usually makes them ideal for many machining jobs. Third, they also give stable dimensions. Finally, and most importantly, they can withstand extreme heat. As you know, this property is crucial for die-casting jobs.

Hardened tool steel has five different groups. Each group is ideal for unique applications.

Cold-working Die Casting Mold Material

The following four grades are widely prevalent in die-casting mold manufacturing.

Grade Carbon Manganese Silicon Chromium Nickel Molybdenum Vanadium
O6 1.45% 1.00% 1.00% – – 0.8-1.4% –
A3 1.25% 0.50% – 5.00% 0.30% 0.9-1.4% 0.8-1.4%
A6 0.70% 1.8-2.5% – 0.9-1.2% 0.30% 0.9-1.4% –
D2 1.50% 0.45% 0.30% 11.0-13.0% – 0.90% 1.00%

die casting mold equipment

Hot-Working Die Casting Mold Materials

As the name suggests, these materials are subjected to high temperatures during casting. They are ideal for HPDC die-casting molds. There are various grades: Grades H1 to H13 are usually chromium-based alloys. On the other hand, tungsten alloys are from H20 to H39, and molybdenum-based alloys are from H40 to H59.

Other types

There are other types of die-casting mold steels as well. SKD61, 8407, DIN 1.2343, 2083, and 8418 are noteworthy. These steels offer specific properties. As you know, die-casting methods have different types. Therefore, materials also vary based on these types.

Three Common Types of Die Casting Mold

We can generally divide molds into three types based on the number of cavities. This diversity mainly arises due to specific needs. Different cavity designs allow die-cast mold makers to produce parts rapidly.

Type #1 Single-cavity Dies

As the name suggests, these die-cast molds have a single cavity. Using these dies, you can produce one metal part per cycle. People widely use these molds for simple and low-volume orders.

Using these dies makes design easier, which is their main advantage. However, the speed of output is slower than with multi-cavity dies.

Type #2 Multi-cavity Dies

Multi-cavity dies have more cavities. Using these dies, you can produce multiple metal parts per cycle. This means you can produce more products than single-cavity dies. Therefore, multi-cavity dies are ideal for high-volume orders.

The best thing about these dies is that they offer cheaper production costs. However, they usually have complex designs.

Type #3 Family Molds

In multi-cavity dies you will find the same cavity design but multiple times. You can generally create multiple metal parts per cycle. However, in family molds, these designs are different. So, in one sense, all family molds are multi-cavity molds, but all multi-cavity molds are not family molds.

Aluminum Die Cast Mold: Market Trends

The aluminum die-cast mold market will grow significantly in 2024. According to Persistence Market Research, this market was valued at $301.3 million in 2023. In the future, this sector is expected to grow steadily at 4.8% every year. Experts expect this market will reach up to $481.6 million in 2033.

How are Die Casting Molds Made?

In the preceding section, we have briefly discussed various die-casting methods and molds or tooling types. In this section, we will generally focus on how they are made. You will be familiar with the step-by-step process in every die-casting factory. So, you will know every step of making the molds whenever you plan to make unique metal parts. This is actually important for custom metal parts manufacturing.

Step #1 Designing the Mold

This step is perhaps one of the most important aspects of the process. Here, you will decide how you wish your metal part to appear and what steps will be involved in manufacturing it. Depending on the part’s design, the type of die-casting method must also be properly selected.

Two parameters are essential in this case: a dimensional analysis and a geometric perspective. The dimensional view informs you of how many cavities your metal part has. Which of the single-cavity or multi-cavity or family mold types is required? This design also makes it easy for you to determine the pressure and volume of the casting.

A geometric view that informs you of the level of complication of the metal part and your plan on how to open and eject it. However, it is very important to note the kind of parting line that is used here. You must ensure that this parting line will coincide with the mold opening direction.

Similarly, a die-casting company also considers other important aspects during this step. We will briefly discuss those in the next section.

Step #2 Choosing the Material

The die-casting method usually involves varying pressure and temperature. Therefore, you must select material that is highly compatible with these situations. In general, engineers use various types of tool steels here. In the previous section, we have discussed these tools steel in detail.

Step #3 Machining the Mold

Once your design and materials are ready, you must plan how to shape the die-cast mold. In this case, various machining methods play a crucial role. Engineers prefer CNC machines for making die-casting molds.

As you know, CNC machining offers exceptional precision. You can technically achieve tolerance up to 0.01mm. You have options like CNC milling, drilling, turning, boring, and more.

Step #4 Heat Treatment

Various heat treatments are very important in die-casting mold making. This step significantly improves the machined parts’ strength and durability. Besides, the process makes the mold more resistant to wear and tear.

Common heat treatment methods are quenching, tempering, annealing, and stress relieving. These methods typically ensure the die-cast mold performs well during die-casting.

Step #5 Finishing

After heat treatment, the new die-cast mold needs some finishing touches. These steps are crucial to ensure smooth surfaces and precise dimensions.

Finishing techniques may include polishing, grinding, and sandblasting. The main purpose of all these techniques is to give the die-casting mold parts smoother and better textures. As a result, they can achieve high tolerances.

Step #6 Assembly if necessary

There are times when you may need to make die-cast mold parts separately. When there are many parts, assembly must always be done carefully. The die-casting mold factory always checks to ensure the assembly is lined up correctly.

Step #7 Testing

Once all the steps above are done, die-cast mold manufacturers test these molds in the lab. They run tests to ensure the mold is in good shape and works correctly. These tests tell you that the molds are high-quality.

die casting mold

Key Steps in Die Casting Mold Design

As mentioned in the last part, several key factors are considered when designing a die-casting mold. This section will mainly discuss those and discover why they are crucial in die-cast mold manufacturing.

Actual Part Design

Before making the die-casting mold, engineers create the part itself. For this job, they use various 2D and 3D drawing programs. In most die-cast mold factories, graphic designers typically use SolidWorks or AutoCAD.

During visual testing, you need 2D models. Engineers use this drawing to check the sizes after each stage of production. A well-designed part gives high-quality results. So, whenever you work with a manufacturer, make sure they have these plans before they start making the product.

Die Casting Injection Molding Type

This is a very important factor when making a die-casting mold. Usually, it changes the quality, strength, and finish of the finished part.

Based on this injection, there are six different types: HPDC, LPDC, Vacuum, and more.

When designing the injection type, several factors need to be considered. First, what type of metal are you working with? Second, did you consider parting lines, geometric views, and design details? Third, what is your expected production speed?

When you use the right injection type, the mold will always fill properly, and casting flaws will be less common. Also, the right pick cuts cycle time by a large amount. In general, you can get very good output.

Gate And Runner Design

The gate and runner channel molten metal into the die-casting mold and usually control the flow of the liquid. Proper design ensures smooth and efficient filling and reduces various types of casting defects.

Consider size, location, and shape when designing a gate and runner. The gate must be placed in the right place to minimize turbulence.

Die Casting Mold Base Design

The mold base typically supports and aligns all mold parts. When designing, ensure you have created a robust design. It provides the system’s overall stability.

You should consider the material and temperature here. The mold base must withstand high pressure and temperature. You should also check for proper alignment and fit.

Cooling System

The cooling system helps the mold solidify the molten metal. A proper cooling system typically improves production speed and part quality. However, inappropriate cooling can cause various casting defects. Therefore, ensure an appropriate cooling system when designing a mold.

There are different kinds of cooling systems. People often use water lines and cooling inserts. Cooling plugs are great for places that need to cool down quickly. When you design a mold cooling system, try to balance the heat across the mold.

Venting and Ejection System

The ventilation and ejection system mainly removes trapped air from the mold. The trapped air could either be created by mold or be there before the injection.

When designing a mold, place the vents at high points. In this case, you can use thin vents to avoid flash. Also, put the ejector pins in the right place to prevent damage.

Note that effective venting and ejection systems usually improve part quality. Overall, it reduces cycle times and production efficiency.

Simulation

Once you have considered all the factors above, the simulation shows you precisely what you have designed. Simulations can help you find flaws and issues with the flow of metal. Die-cast Mold Makers typically use software like MAGMASOFT, ProCAST, and Flow-3D.

Frequently Asked Questions

What metals are used in die casting?

In die casting, the common metals are aluminum, zinc, magnesium, lead, pewter, and copper. These metals are popular due to their low melting point. Besides, they also offer excellent casting properties, strength, and durability. Among all these metals, aluminum is the most popular. It is lightweight and has an excellent strength-to-weight ratio.

Is 4140 a tool steel?

Yes, LSS 4140 steel is a type of tool steel. This alloy offers excellent hardness, strength, and wear resistance. It is an excellent tool steel for most machining jobs. More specifically, you can find its use in various rotating components. For example, axles, drive shafts, gears, and spindles are noteworthy.

What kind of steel is used for die casting?

The kind of steel mainly varies based on the type of die-casting method. For HPDC die-casting molds, H series tool steels are widely prevalent. On the other hand, for LPDC or cold-working jobs, the O, A, and D series of steel tools are famous. Some special grades are also there, like SKD61, 8407, and 8418.

Summary

Die casting is crucial for making many complex metal parts. You can create die-casting parts through various methods. HPDC and LPDC are the two most common methods you will use in a die-casting mold company.

Die-casting mold has three types:  single-cavity, multi-cavity, and family molds. Each type is suitable for specific production requirements.

Sincere Tech is one of top 10 mold manufacturers in China that offers plastic injection mold, die casting mold. This mold factory offers a wide range of plastic mold and die-casting services. Their customer service is also very fast. Feel free to contact us.

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What Is CNC Milling? Everything You Need To Know!

CNC milling machining service

What Is CNC Milling

Knowledge of what is CNC milling enables one to understand the process. Some of the topics discussed in this blog include spindle speeds, feed rates, axes movements, G-codes, and machine controllers. We will also describe how these parts combine to function as a single unit. There is a lot of precision in CNC milling. Got to what is CNC milling 101 to know more.

How Does CNC Milling Work?

Process Overview

CNC milling employs G-codes and M-codes. This moves the spindle. The table supports the workpiece. What Is CNC Milling is essential to learn. It is used to rotate the cutting tool. They make precise shapes.

This can cut at varying speeds. RPM and feed rate are among the parameters that regulate it. The X, Y, Z axes dictate the process. It produces parts with precision. The movements are coordinated by the machine’s controller.

What is CNC Milling

CNC Programming

The program instructs the CNC mill on what needs to be done. This uses G-codes for movements. M-codes control auxiliary functions. The toolpath defines the movement of the cutting tool.

It starts and stops. The spindle speed matters. They enter parameters for each axis. This ensures precise machining. It is used before cutting to check for errors. CNC controller receives and interprets commands.

Machine Movements

The movements of the machines in CNC milling are accurate. This includes the X axis, the Y axis, and the Z axis. The spindle rotates. It cuts the material. Linearity controls the tool.

They establish feed rates and depths. Inputs are controlled by the control panel. This ensures accuracy which leads to perfect parts. The servo motors control the speed. CNC mills create accurate forms.

Cutting Tools

Cutting tools in CNC mills are significant. What Is CNC Milling helps you understand it better. This uses end mills and drills. The tool holder secures them. They spin fast. It cuts the material.

It is influenced by parameters such as RPM. The flute number matters. That impacts chip removal. The spindle grips the tool firmly. This ensures clean cuts. One tool creates different shapes.

What Are the Main Components of a CNC Milling Machine?

Machine Frame

The frame supports all the other components of a CNC machine. On this one, it is strong and stable. They require a strong foundation. This is made from metal.

Some of the parts include rails, screws, and bolts. It maintains the stability of the machine. Accuracy is very important in the CNC milling process. That means that small errors can ruin parts.

The frame has to be rigid. Some frames are made from iron. They weigh a lot. Frames can be of different shapes. This assists in supporting the machine. Frames must be well-built.

Spindle

The spindle is central to CNC milling. What Is CNC Milling is good to know. It spins fast. This can go up to many RPM as. They hold cutting tools. It sways up and down. This makes holes. Spindles use bearings.

These reduce friction. They keep it cool. Spindle speed matters. Faster speeds cut faster. It needs cooling fans. Some spindles are electric. Others use air. This part is crucial. That is why it is carefully made.

Control Panel

The control panel operates the CNC machine. It has many buttons. This is where you input commands. Screens show settings. They assist you to track the process. The panel has a CPU. It runs programs.

This can be a touchscreen. Controls are very precise. Inputs are in G-codes. These instruct the machine what to do. Safety switches are important. The panel has to be easy to use. It makes CNC milling possible.

Axis Motors

Axis motors transport the CNC parts. What Is CNC Milling is interesting to know. They regulate the motion in X, Y, and Z directions. It allows precise movements. This can be up to microns.

They use stepper motors. These provide exact control. The motors are powerful. This assists with quantities of parts. Motors require cooling. They can get hot. This means that axis motors require reliability. That is why they are well engineered. Proper setup is crucial.

Tool Changer

The tool changer works very fast. It holds multiple tools. This can be automatic. It reduces downtime. It is important that tools are sharp. It changes them quickly. They have sensors. This ensures correct placement. The tool changer has a magazine. This stores the tools.

It is crucial for increasing productivity. All the tools serve a particular function. Changing them must be fast. It has to be noted that the whole process is fully automated. It makes CNC milling efficient.

CNC Milling Machining

Component Function Material Common Models Key Specifications Maintenance
Machine Frame Structural support Cast iron, steel Haas VF-2, DMG MORI Weight: 2,000-3,000 kg Lubrication, cleaning
Spindle Rotates cutting tool Alloy steel BT40, HSK63 RPM: 12,000-30,000 Bearing inspection
Control Panel User interface Plastic, metal FANUC, Siemens Screen: 10-15 inches Software updates
Axis Motors Drives axes movement Aluminum, steel NEMA 23, Servo motors Torque: 2-10 Nm Alignment checks
Tool Changer Switches cutting tools Steel, aluminum Umbrella, Carousel Capacity: 10-30 tools Pneumatic checks

Table on the Main Components of a CNC Milling Machine!

What Materials Can Be Milled Using CNC Machines?

Metals

CNC milling shapes metals such as steel and aluminum. It has a spindle that rotates at 8000 RPM. This machine’s accuracy is 0. 001. The tool head translates in the X, Y, Z directions.

They can switch between tools interchangeably. That saves time. The coolant maintains temperatures low. Chips come off the workpiece. CAD files are used as a reference.

The control unit of the machine follows the program. This makes complex shapes. The metal develops smooth edges. A vise holds it tight. The spindle speed is actually an important factor. The last section is good.

Plastics

CNC milling also forms plastics. The spindle rotates very fast at 12000 RPM. It employs bits for various cuts. They progress in three dimensions. This creates precise parts. The material gets fixed by clamps.

The control unit scans the CAD file. That guides each cut. Chips are put into a vacuum. The tool is cooled by the machine. It prevents melting. Plastics become neat shapes. The table keeps it level. Got to PEEK CNC machining to know more.

The cutting is done by a tool known as the end mills. They make clean edges. It is fast and precise. The plastic part is ready.

Composites

Composites are known to be milled by CNC machines. The spindle rotates at a speed of 10,000 RPM’s. The tool bits cut layers. It also moves on all three axes. The working fluid in the machine cools it.

It reads the CAD file for shapes. This makes complex designs. Chips get cleared by air. The vise keeps it in place. The control unit operates according to the program. It switches tools automatically.

It is at this stage that the composite gets smooth edges. The process is efficient. It produces strong and lightweight components. The table moves precisely. The last part is described in detail.

Wood

The carvings made with CNC milling are smooth on the wood. What Is CNC Milling can explain more. The spindle rotates at 7,500 rpm. Bits are different for different cuts. They travel in X, Y, Z direction. The wood gets compressed firmly. The control unit operates based on CAD files. It guides each cut.

The vacuum clears chips. Coolant has the function of cooling the tool. The machine works and forms precise shapes. The table moves precisely. This ensures accuracy. The end mills cut very well.

They make clean edges. The wood part appears clean. That is how CNC mills wood. The process is swift.

Ceramics

Ceramics can also be milled using cnc. The spindle rotates at 6,000 RPM. It uses diamond-tipped bits. They operate along three dimensions. The coolant prevents cracks. In other words, the CAD file controls the operation of the machine. This makes intricate shapes. Chips are removed by air.

The vise ensures the firm positioning of the ceramic. The control unit switches tools. It is in compliance with the program to the letter. The machine produces sharp edges. It makes strong, detailed parts.

The table moves accurately. The ceramic stays cool. They complete it with touches. The part is durable.

What Are the Types of CNC Milling Machines?

Vertical Milling Machines

CNC milling employs vertical machining with X, Y, and Z movements. These machines are equipped with a spindle and a motor. The spindle also goes up and down. It’s controlled by G-code. This machine type has a table attached to it. The table supports the workpiece. They employ end mill for cutting materials.

This setup allows for precise cutting. The speed can be set as high as 1 200 RPM. Factors such as depth and feed rate are important. Vertical mills are accurate in their operation. They are ideal when it comes to intricate work.

Horizontal Milling Machines

CNC milling encompasses horizontal machines. They have a spindle that runs horizontally. The spindle rotates at 1500 rpm. It uses face mills for cutting materials. This machine has movement along an X-axis.

The Y-axis is useful for left and right movements or shifts. The workpiece is positioned on the table. They handle large tasks. This can easily make deep cuts. The speed and feed rate of the machine is very important. Horizontal mills are powerful. That is why they are used often.

Multi-axis Milling Machines

CNC milling uses multiple axis in its operations. They function with XYZ and A, B axes. The spindle rotates in a number of ways. This allows complex cuts. It has a control panel. The control panel determines the values. For precision, they utilize ball screws. This aids in refinement activities.

The speed of the machine can be 1800 rpm. The workpiece rotates on a trunnion table. Multi-axis mills are advanced. They achieve intricate designs. This is good for detailed work.

Gantry Milling Machines

CNC milling comprises of gantry machines. They possess a fixed bridge. The spindle translates on the gantry. This setup provides stability. It incorporates a powerful motor. The motor operates at 2000 rpm.

This machine deals with large workpieces. The X-axis and Y-axis are wide. They use end mills for cutting and these end mills are of heavy-duty in nature. Control panel shifts settings. Gantry mills are strong. They perform heavy-duty tasks. The precision is unmatched.

Bed Milling Machines

CNC milling has bed-type machines. What Is CNC Milling answers many questions. They contain a fixed spindle. The table translates along the X-axis. It provides stability. The spindle speed is 1600 rpm.

This machine uses a ball screw for accuracy. It is suitable to be used for heavy materials. They handle large tasks. The table is used to provide support to the workpiece. This allows accurate cuts. The control panel specifies values. Bed mills are reliable. They perform robust operations.

How to Select the Right CNC Milling Machine?

Application Requirements

In CNC milling, G-codes are used to translate the movement of the spindle. It needs precision. X, Y and Z axes work. This tool is used for cutting metals or plastics. The spindle spins fast. Figures such as 3000 RPM are significant. CAM software helps plan. Feed rate and depth can make a difference.

They should complement the job that is to be done. That keeps parts accurate. FANUC or Siemens controllers regulate the process. They are crucial. Other cutters include ball or flat end cutters. The orders are implemented with precision by the machine.

Material Compatibility

It must also be remembered that different materials require different environments. CNC milling adjusts. They employ codes in determining where to cut. This is vital. Stainless steel requires low feed rates. It keeps tools safe. Aluminum allows faster cuts. The tool’s hardness matters.

There are various types of cutters for the woods. The spindle speed has to therefore be proportional to the material being worked on. CAM software makes the right decision. Lubricants are used to cool parts. That helps avoid damage. Factors such as torque and power are involved in the process.

Precision Needs

Accuracy is very important when using CNC milling. What Is CNC Milling explains more about it. Microns are used by machines for accuracy. The tool follows G-code. It must be exact. Linear encoders assist in determining movement. This ensures tight tolerances. Contrasting axes need to be in harmony.

Ballscrews and guides help in this. That keeps errors small. Accuracy is a crucial characteristic of the controller, as it determines the results achieved. Features such as backlash compensation do help.

They guarantee correct path of the tool. All of them should be in harmony with the designed part. Checking measurements is important.

Production Volume

CNC milling accommodates different volumes. Both small to medium production volumes and large scale production can be done. This affects settings. They use the same G-codes. They both use the same G-code. Tool changes are automated. Pallet changers assist in speeding up.

The machine’s capacity matters. This decides how many parts it produces. CAM software optimizes paths. Cycle time is crucial. That indicates how long it takes for a particular part. The speed may vary depending on the materials used. Volumetric tasks require strong instruments.

Budget Constraints

CNC milling costs vary. Initial machine price matters. This includes controllers and spindles. Each model has its own price range. Maintenance costs are ongoing. Items such as tools and coolants are part of the total cost. They must be considered. Efficiency saves money. CAM software helps. It reduces waste.

Reduced cutting speed and feed rates also lead to increased costs. This balance is key. Upgrades can be costly. Selecting the right machine will prove to be cost effective in the long run.

Prototype CNC milling

What Are the Advantages of CNC Milling?

High Precision

Additionally, CNC milling is advantageous in that it enables the creation of very accurate parts. What Is CNC Milling is good to know. This machine has movements controlled by G-code. It can cut right up to a thickness of 0.001 inch. That’s super tiny! The spindle can rotate up to 30000 RPM.

End mills and drill are some of the equipment used to give the right shape to the parts. The table supports pieces to remain stable. The coolant keeps it cool. This prevents it from overheating.

It is useful for creating small components such as gears and bolts. They are all just right for each other. CNC milling is great for accurate work.

Repeatability

CNC milling’s repeatability of jobs is precise. That means it produces parts constantly. This machine employs coordinates in its movement. This typically follows the same sequence all the time. It employs X, Y, and Z axes. The spindle is set at a specific number of revolutions per minute.

Cutting tools such as face mills and taps cut parts. They keep it all the same. The table supports each piece in position. This ensures no movement. Consistency is important for large quantity orders. CNC milling rocks for this!

Efficiency

CNC milling produces parts quickly and accurately. What Is CNC Milling helps you understand how. This machine begins with CAD files. It uses high-speed cutting tools such as ball mills and reamers. It has feeds and speeds setting. The spindle can run 24/7. It keeps working cool with the help of coolant.

The table moves quickly. That saves lots of time. All these parts are done faster. This can help make many pieces in a short time. Efficiency is very important. They make many things quickly. CNC milling is great!

Flexibility

CNC milling has the ability to shift from one task to another easily. It can make many kinds of shapes and sizes. This machine scans CAD/CAM designs. The spindle has accessories that include fly cutters and boring heads. It shows that the table can be adapted for different parts.

This assists in changing jobs quickly. It employs various materials such as metal, plastic and even wood. All these get chopped cleanly. The software alters tool paths. Flexibility is the ability to perform new things. CNC milling performs many tasks. That’s super handy!

Reduced Labor Costs

Work costs are reduced by CNC milling. What Is CNC Milling will tell you more. This machine operates on its own to a large extent. It operates using NC code. Many tools are managed by the spindle such as chamfer mills and slot drills. The table moves without any assistance. This means fewer workers.

It continues working long hours. Coolant systems make it run well. They are cost effective and time saving. This machine performs many tasks. Less labor cost is always good. CNC milling reduces cost and time!

Conclusion

Knowing what is CNC milling demonstrates its accuracy. It employs G-codes, spindles and feed rates. For more details, visit PLASTICMOLD. CNC milling enables creation of precise components. Find out how CNC machines can work for you.

 

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High Temperature Plastic Material

best cnc machined ptfe parts price

The research and development in the fields of polymer chemistry and material science was significant in the mid of twenty century. The plastics and polymers were created as a result of this research and development. These materials had the capability to withstand higher temperatures. Polyphenylene sulfide and Polytetrafluoroethylene were initially created which proved to face and withstand higher temperatures as compared to traditional plastics. The aerospace industry raised significant demand and requirement of high temperature polymers or plastics in the 1970s.The efforts which were exerted because of the requirement of lightweight materials, bearing outstanding mechanical and thermal characteristics then resulted in the creation of the polymers like numerous types of polyamides and polyetheretherketone.

Ultimately metal parts of air craft engines and its structural components were replaced by these light weight and high temperature resistance plastics. The conventional plastics tends to get soften at high temperatures and then start to degrade at these elevated temperatures. While on the other hand high temperature plastics keep their properties intact at elevated temperatures and are considered suitable to be used in industries where extreme operating conditions exist. These properties include chemical resistance, dimensional stability and mechanical properties which are vital to performance of high temperature plastics. These high temperature plastics which are engineered to face and withstand high temperatures in extreme environments are also called engineering thermoplastics or high performance thermoplastics.

High temperature plastic material

 

Defining the High Temperature Plastic Material

High temperature plastic matreial is the material which is specially designed to be operated at high temperatures and withstand these elevated temperatures. The basic feature which is of importance is that high temperature plastics maintain their structural integrity and their mechanical properties at high temperatures. These high performance engineering plastics keep their original shape and do not deform while operating at elevated temperatures.

Depending upon the category of the plastics, they maintain their characteristics between the temperature ranges from 150°C to above 300°C.These high temperature plastics find their utilization in high temperature applications where normal plastics would degrade and deform and cannot sustain that high temperature. It is pertinent to mention that metals bear high weight and metals are also susceptible to corrosion. Keeping that in view high temperature plastic materials replace meals in such applications being light weight and corrosion resistant.

High temperature polymers and high temperature plastics (Differentiation)

The variation in composition and structure differentiate plastics and polymers. High temperature polymers are a vast category while high temperature plastics are subset of this broader category. High temperature polymers are comprised of both thermoset and thermoplastics. Advanced polymerization methods are applied to synthesize these polymers. Most of the times specific reinforcements or additives are utilized to increase their performance against high temperatures.

However, high temperature plastics are only comprised of thermoplastics. These plastics are designed to face and sustain elevated temperatures without deforming. These plastics offers very little or no degradation at high temperatures. These plastics are specifically engineered to keep their chemical resistance, mechanical properties and dimensional stability high temperature environment.

What Are the Materials of High Temperature Plastics (characteristics and Applications)?

Followings are the materials which fall in the category of high temperature plastics.

  1. Polytetrafluoroethylene (PTFE)

This material which is also termed as PTFE is excellent electrical insulator and is extensively utilized in applications where electrical insulation is required. This material is also used for non stick coating especially in cookware and in seals and bearings. This utilization is based on some prominent properties of this material as follows.

  • High temperature stability
  • Low friction coefficient
  • Good chemical resistance
  1. Polyphenylene Sulfide (PPS)

This PPS material is a thermoplastic which has semi crystalline structure and exhibits following important characteristics.

  • Flame retardency (inherent)
  • High temperature resistance
  • Chemical resistance
  • Dimensional stability

These characteristics made this material suitable to be utilized in industrial applications. This material is also utilized in electrical and electronics sector in production of housings and connectors. Moreover in automotive industry this material is used to manufacture under the hood components. Go to PPS injection molding to know more about this material.

injection molded thermoplastic

  1. Liquid crystal polymer (LCP)

This material which is also referred as LCP finds its applications in the following areas.

  • Telecommunication sector
  • Electronics industry (switches and connectors manufacturing)
  • Automotive industry (production of under the hood components)

This material bears the following significant properties which enable these materials to be utilized in above mentioned applications.

  • Excellent chemical resistance
  • High mechanical strength
  • Good dimensional stability
  • Excellent stiffness
  1. Polyetheretherketone (PEEK)

This material is also thermoplastic having semi crystalline structure and is also termed as PEEK. This material exhibits following characteristics.

  • High strength to weight ratio
  • Good mechanical properties
  • Excellent chemical resistance
  • Stability at elevated temperatures up to 250°C

Keeping in consideration of above mentioned properties of PEEK, it is extensively utilized in the following applications for manufacturing f the components which demands resistance to extreme environmental conditions and good mechanical strength. Go to peek plastic injection molding to know more.

  • Semiconductor industry
  • Automotive sector
  • Aerospace industry
  • Medical sector
  1. Polyetherimide (PEI)

This material which is also called PEI provides followings important properties.

  • Flame resistance
  • Good mechanical strength
  • High thermal resistance
  • Excellent dimensional stability
  • Good electrical properties

Major applications of this material cover the following sectors.

  • Medical sector (manufacturing of sterilizable surgical instruments)
  • Automotive industry
  • Electronics industry
  • Aerospace sector
  1. Polyimides (PI)

Ployimides material which is also termed as PI offers following characteristics.

  • Good mechanical properties
  • Excellent thermal stability up to 400°C
  • Good chemical resistance
  • Low thermal expansion

This material is extensively utilized in the electronic industry, aerospace sector and automotive industry for following applications.

  • Electrical insulation
  • Thermal shields
  • Engine parts and spares
  • Circuit boards
  1.  Fluoropolymers (FPE)

The high temperature plastic materials which fall in this broader category are as follows.

  • Fluorinatedethylenepropylene
  • Polytetrafluoroethylene
  • Perfluoroalkoxy

These polymers tend to show certain qualities described as follows.

  • Elevated temperature stability
  • Excellent chemical resistance (against acids, bases and many solvents)
  • Low friction coefficient

These materials find their applications mainly in the following applications.

  • Wire coatings
  • Semiconductor processing
  • Tubing
  • Seals
  • Linings
  • Chemical processing equipment

  8.Polyphenylsulfone (PPSU)

PPSU is a thermoplastic, high-temperature engineering plastic part that was discovered in the 1960s. Their density is 1.24 g/cm2, water absorption is 0.22%, shrinkage rate is 1.007 (0.7%), melting temperature is 190 °C, heat distortion temperature is 1.82 MPa at 174 °C, and long-term use temperature ranges from -100 °C to +150 °C. This is one of the highest-quality plastic materials among them.

Simple molding process for PPSU plastic material

Pre-drying: PPSU needs to be pre-dried before processing to remove moisture in the material and prevent hydrolysis reactions at high temperatures. The drying temperature is 90℃–110℃, at least 3–4 hours of drying time.

Preheating: PPSU needs to be preheated before injection molding to improve the fluidity of the material. The preheating temperature is usually between 80 and 120 °C.

Injection: injecting PPSU into the mold. Injection pressure and speed need to be determined according to the type and injection molding wall thickness.

Cooling: This is pretty much the same as other injection molding parts, but PPSU needs a higher mold temperature than ABS or PC material, so normally the cooling time will be a little longer, but this depends on the wall thickness of the molding part.

Ejection: Once the PPSU injection molding parts have completely cooled in the mold cavity, the mold opens, and the ejector system ejects the molded part out of the mold.

Post-processing: some parts may need some post-manufacturing, such as machining, CNC turning, cleaning, etc., depending on the customer’s requirements.

Application of PPUS molding parts,

PPUS is very expensive and is normally used in electrical appliances, electronics, medical industries, baby bottles, instruments, and aerospace departments for heat-resistant, corrosion-resistant, high-strength parts and insulation parts, industrial films, etc.

Below table are some of high temperature materials for your reference, if need high temperature plastic molding parts, you are welcome to contact us.

Characteristic ASTM Testing PTFE PFA FEP ETFE PCTFE PVDF PEEK PPSU PPS
Melting Point (Approximate  Tem:C) 327 308 270 260 211 175 343 250 278
Maximum continuous use temperature (20000 hours，Theoretical value:℃ 260 260 200 150 120 150 260 180 240
Thermal conductivity C177(( W/cm·k).℃/cm) 0.25 0.25 0.25 0.24 0.21 0.13 0.66 0.45 0.5
Hardness (shore) Shore D hardness tester D50-D65 D60 D55 D70-D75 D80 D75-D85 D85 D85-95 D87-95
Tensile Strength (Mpa) D638 25-40 28-35 20-25 40-50 32-40 40-58 98 – 100 94-100 >150
Compressive strength (Mpa) D695/1% Distorsion，25°C 5-6 5-6 5-6 11 9-12 13-14 25-35 95 27-134
Elongation (%) D638 250-450 300-400 270-330 400-450 90-250 300-450 40-50 60-120 200
Impact strength (J/m) D256 160-170 no breaking no breaking no breaking 135-145 1105 40-50 690 800
Proportion D792 2.13-2.22 2.12-2.27 2.12-2.27 1.70-1.86 2.10-2.14 1.76-1.78 1.26 – 1.32 1.32-1.5 1.32-1.5
Shrinkage Rate (Theoretical value) 2%-5% 4% 3%-6% 3%-4% 1.5%-2% 1.40% 0.50% 0.50% 0.50%
Dielectric constant D150/106HZ 2.1 2.1 2.1 2.6 2.4 6.43 3.2 3.94 3.5
Electrical breakdown strength(MV/V) D149/shot time，3.2mm 19 20 20-24 16 20-24 10 25 6.3 17
Weather resistance excellent excellent excellent excellent excellent excellent excellent excellent excellent
Resistance to chemicals excellent excellent excellent excellent excellent excellent excellent excellent excellent
Flame retardancy, flame retardancy (%) Limiting oxygen index concentration >95 >95 >95 >31 >95 >43 >95 >95 >95

What Are The Processing Methods Of High Temperature Plastics?

Special techniques are used for processing of high temperature plastics. Moreover, during the processing it is make sure that characteristics of high temperature plastics including mechanical strength and heat resistance remain intact during the whole manufacturing operation.

The most common and extensively used processing methods for high temperature plastics are as follows.

  1. Compression Molding

In this process an open mold cavity is prepared. This mold cavity is then heated and a calculated amount of plastic is placed inside it. After that this mold is closed and an adequate pressure is applied onto the material. Application of this pressure compresses the material and the material is transformed into the required shape. The parts which are of large size and have complex geometries are molded by this method. These parts are difficult to be molded by other molding processes. The materials which are processed by compression molding method include polyetheretherketone, polyimides and thermoset high temperature plastics. Following parameters need to be controlled for producing uniform and defects free final product.

  • Temperature
  • Pressure
  • Molding time
  1. Injection Molding

In this processing method a mold cavity of desired shape is prepared first. After that the plastic material in molten form is injected into that mold cavity. This injection is carried out under high temperature and pressure. High temperature plastics are most commonly processed through injection molding. This processing method is feasible for high volume items and intricate shapes. The materials which are processed through injection molding consist of fluoropolymers, polyphenylene sulfide, polyetheretherketone and polyetherimide. The parameters which are required to be controlled to avoid warping and to achieve dimensional stability are as follows:

  • Cooling rates
  • Temperature
  • Mold material resistance to corrosive environment
  • Mold material resistance to high temperature
  1. Extrusion

This method utilizes extrusion process to produce desired product or item. In this processing technique a permanent die of desired shape is utilized. The plastic material in molten form is forced into the die by using compressive force. As a result of this product of uniform cross section bearing continuous profile is produced. In order to avoid thermal degradation the control of extrusion temperature is critical.

In extrusion processing of high temperature plastics the quality of the extruded product and smooth flow of the material varies from material to material. So, die geometry and design of screws are adjusted to achieve the desired quality. The most common high temperature plastics which are commonly processed through extrusion method include thermoplastic composites, fluoropolymers, polyphenylene sulfide and polyetheretherketone. Following products are produced commonly through this processing method.

  • Tubes
  • Sheets
  • Rods
  • Profiles of high temperature plastics
  1.  Machining

This processing technique involves utilization of various machines and tools to shape the high temperature plastics. In this method most commonly used machines are CNC machines, milling machines and lathe machines. This kind of processing is applied on the products or items which have complicated geometries and are of low volume. This method demands special tooling and specialized techniques because of the resistance and toughness of the material. Check PEEK CNC machining to know more.

But still all kinds of high temperature plastics can be machined by using this technique. During the machining process of high temperature plastics a considerable amount of heat is generated. This heat is crucial to destabilize the dimensional accuracy of the item and also propagate the degradation of the material. In order to eliminate the adverse effects of this heat lubrication is carried out during the machining process.

  1. Additive Manufacturing

This processing method is very unique as compared to other processing methods. In this technique high temperature plastics are utilized in the form of filaments or powders. This powder is used to produce the parts layer by layer. This is carried out by adopting additive manufacturing techniques. Mainly there are two additive manufacturing techniques which are as follows.

  • Fused deposition modeling
  • Selective laser sintering

This process is feasible for producing prototypes. However, parts having complex geometries are also produced. This processing method offers minimal wastage of the material. There are numerous high temperature plastics which are compatible with additive manufacturing method. These materials include polyetheretherketone and polyetherimide. This method requires very accurate control of the process parameters in order to achieve demanded dimensional accuracy and mechanical properties. Moreover, special equipment is required for this processing method which can handle high temperature plastic materials.

High temperature plastics

Conclusion

Material science is touching new horizon and showing advancement because of high temperature plastics. These materials provide very unique and special properties including mechanical strength, elevated temperature stability and resistance to chemicals such as acids, basis and solvents. High temperature plastics materials have enabled the manufacturing of top notch performing spares and products which are strong, lighter and durable. Subsequently, all prominent sectors and industries have experienced revolution including electronics, automotive, medical and aerospace.

The conventional plastic materials cannot withstand high temperatures and experience degradation. However, high temperature plastics are very suitable for those applications because they have the prominent property to face elevated temperatures. Moreover, high temperature plastics show resistance to corrosion and mechanical stresses. These materials provides extended lifespan to products and spares because of their unique characteristics such as resistance to fatigue, keep dimensional stability and electrical insulation under extreme operating conditions.

High temperature plastics are being more important day by day because industrial sector is demanding high performance of components and spares. Advance research and development in the fields of material science and processing methods is depicting that these materials can be utilized for higher requirements. This will result in increased efficiency, sustainability along with safety in numerous sectors.Top of Form

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Top 10 Plastic Injection Molding Companies In China

Plastic Injection Molding Facility

The market for plastic injection molding companies in China has been growing and expanding due to the development of 3D prototype manufacturing. The market size was 36 billion yuan in 2018 and increased to 45 billion yuan in 2023, with a compound annual growth rate (CAGR) of 6%. It has risen by up to 9% over the past five years. This growth is predicted to continue, with the market projected to increase to 58 billion yuan by 2030, with a compound annual growth rate of approximately 5%.

The China Plastics Industry Association has ranked the top 10 plastic injection molding companies in China in 2020, based on their main business income.

Explore the top 10 renown Chinese plastic injection molding companies.

Here is the top list of 10 Chinese plastic injection molding companies recognized for providing rigorous quality standards to their valued customers around the world

1. Dongguan Sincere Tech Co., Ltd.

China plastic injection molding company

Year of Establishment: 2015

Location: Dongguan City is in Guangdong Province.

Industry Type: Four processes commonly used in producing automotive parts are Plastic Injection Molding, Die Casting mold, Machining, and prooduct assembly services China.

Dongguan Sincere Tech Co., Ltd. has been in business for over 19 years and specializes in affordable, high-quality molds and parts. The company is among the best prime plastic injection molding companies in China. They greatly cover the needs of various industries, such as aerospace, medical, and consumer products, by providing rigorous standard quality parts services.

Key Features:

Client satisfaction is ensured by signing an NDA and providing quality after-sales services.

Transparency in Services: Customers are provided with comprehensive information about the raw materials used and the results of the tests conducted on the products, thus creating trust and openness. They also offer affordable prices within reach of any customer’s pocket.

Products and Services:

  • Electronics, household appliances, storage, hair beauty tools, medical devices, etc.
  • Furniture templates, baby products templates, and automotive parts templates.
  • Plastic injection molding, 3D printing, and insert molding, 2k molding, over molding.
  • Other services offered are CNC machining, over-molding, aluminum die casting, plastic product design, and prototype manufacturing.

If you are looking for plastic injection molding companies near me in dongguan city, you are welcome to contact us.

Plastic Injection Molding Companies

Dongguan Sincere Tech Co., Ltd. is a reputable mold manufacturer in China. It specializes in plastic molding and is dedicated to providing high-quality molds and excellent services to its valued customers

Get Quote Now

 

2. Seasky Medical

Seasky Medical injection molding

Business Type: Plastic Injection Molding Solutions Manufacturer

Headquarters: Shenzhen City is in Guangdong Province in the People’s Republic of China.

Year Founded: 1999

Certifications: ISO 10993, ISO 13485:2016, and ISO 8 Cleanroom

Seasky Medical is a prominent manufacturer of plastic molds in China, and it specializes in the medical industry. They offer solutions in mold design, manufacturing, material selection, injection molding, and product development services.

Having been in production for more than a decade and with an extra 11 years of experience from its parent company, Seasky Medical is one of the rarest companies in the medical injection molding company field, which sets it apart for providing stringent quality medical use prototypes to the healthcare industry. The company has an ISO 8 cleanroom production floor and uses 10 state-of-the-art injection molding machines and equipment to produce high-quality plastic injection molds. Seasky Medical is dedicated to providing quality standards to its clients, which has made it one of the leading companies in medical injection molding.

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3. JMT Automotive Mold Co., Ltd.

JMT Automotive Mold

Type of Business: Mold Manufacturing Enterprise

Headquarters: Taizhou, Zhejiang, China

Year Founded: 2005

Certifications: ISO9001/TS16949

JMT Automotive Mold Co., Ltd. is a chief professional plastic injection molding company in China, situated in Huangyan, Zhejiang Province. Since its establishment in 2005, the company has provided its customers with standard-quality products and comprehensive services. They primarily focus on automotive molds, SMC molds, home appliance molds, and household product molds.

Their plant occupies 23000 square meters and has modern equipment: high-speed milling centers from Taiwan, more than 10 Haitian injection molding machines, multi-axis like five-axis high-speed machining centers, coordinate detectors, high-precision EDM machines, material hardness detectors, and 50 CNC processing units.

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4. Dongguan Runsheng Plastic Hardware Co., Ltd.

image 8

Year Established: 2007

Industry Location: Guangdong Province is one of the provinces in the People’s Republic of China.

Industry: Custom plastic injection mold and molding Manufacturing, prototyping machining.

Dongguan Runsheng Plastic Hardware Company is one of the leading companies in China’s plastic injection molding industry that focuses on mold design and assembly. Established in 2007, the company is managed by professional managers and technical personnel committed to creating high-quality, diversified products.

Some of the of the prime services they offer include rapid prototyping machining, injection molding, tooling, die casting, and CNC machining. Dongguan Runsheng has a broad product portfolio, which enables clients to select solutions that meet their requirements.

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5. Shenzhen Silver Basis Technology Co., Ltd.

Shenzhen Silver Basis Technology

Business Type: Industrial Mold Manufacturing | Motor Vehicle Parts Manufacturing

Location: Shenzhen, Guangdong Province, China

Year Founded: 1993

Certifications: ISO9001:2008, ISO14001:2004

Shenzhen Silver Basis Technology Co., Ltd. is among the leading professional plastic injection molding companies in China. They mainly focus on precision molds and offer tooling and molding services for structural parts and large precision injection molds. It has worked with global companies like Peugeot automobiles and ZTE mobile phones.

Silver Basis Technology provides specialized services for the automotive sector. It provides car makers with molds for large automotive interior and exterior parts, functional parts, and automobile security systems.

Other Products

They also offer Metal stamping and die casting, as well as interior and exterior automobile parts.

Product testing services, stringent quality plastic molds, and fabricated parts.

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6. Rilong Mold Co., Ltd.

China Mold

Year Established: 1990

Location: Shenzhen, China

Industry Type: Plastic Injection Mold and Molding Manufacturing

Certifications: ISO 9001:2015, ISO 14001:2015, IATF 16949:2016, and many others

Rilong Mold Co. is a Chinese injection mold manufacturing company with the prestige of providing high-precision plastic injection products. They have a strong workforce of 300 employees, specializing in engineering, production, and testing. Rilong offers a full range of in-house manufacturing services that can be customized to meet the client’s specific requirements. Their portfolio includes automotive parts, optical products, security cameras, and electronics.

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7. HT Mould

Plastic injection mold manufacturing

Year Established: 2006

Location: Shenzhen, China

Type of Industry: Plastic injection mold Manufacturing

Certifications: ISO 9001:2015, ISO 14001:2015, IATF 16949:2016

HT Mould is a professional plastic injection molding company in China that was founded in 2006. They deal in plastic mold design, injection molds, and molded parts for different sectors of the economy. HT Mold is based on 450 professional employees and has offices in different regions of the globe, such as America, Russia, and Europe.

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8. Richfield Plastics Ltd.

Plastic Mold Manufacturer

Business Capabilities: Plastic mold Manufacturer, Supplier, Exporter, Private Label

Location: Dongguan

Main Markets: America, Europe, and the Middle East.

Year Of Establishment: 2001

Certificates: ISO certification

Richfields Plastics Ltd. was founded in 2001 as a plastic injection molding company. Over the years, it has grown to offer its clients complete solutions for their manufacturing needs, including mold manufacturing.

Richfield Plastics is a mold maker and injection molder based in Dongguan, China. It has an 18,000-square-meter factory and 250 employees. Moreover, it provides a variety of post-processing service finishing services, including spray painting, printing, assembly, packing, and labeling.

Unlike some competitors, Richfields Plastics offers injection molds and plastic products to several industries, including automotive, sports, consumer products, rubber, toys, home and kitchen products, and tools.

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9. TK Mold (Holdings) Ltd.

Plastic Injection mold

Type of Business: Plastic Injection mold, Molding Solution Provider

Headquarters: Shenzhen is a city in Guangdong Province, China.

Year Founded: 1983

Certifications: ISO 9001:2015, ISO 13485:2016, ISO 14001:2015, OHSAS 18001:2007

TK Mold Holdings Limited is a leading brand that has gained a reputation for offering unique plastic mold solutions to the medical and automotive sectors. Founded in 1983 in Hong Kong, TK Mold has been in the industry for over 40 years and is a professional manufacturer of plastic molds and parts for medical appliances, smart home devices, mobile phones, and precise electronics. TK Mold is a well-known brand in China and Asia, and it has achieved remarkable success; it is the first company in revenue among Chinese MT3-level suppliers, according to IPSOS, an independent marketing research company.

TK Mold currently consists of five production lines: four in Shenzhen and one in Germany. The company has a large production area spread over over 200,000 square meters. Moreover, TK Mold Holding is a reputable company that covers various sectors, including telecommunication, automotive, electrical appliances, healthcare, and digital mobile devices.

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10. Eco Molding Co., Ltd

Custom Plastic Injection Molding Manufacturer

Type of Business: Custom Plastic Injection Molding Manufacturer

Headquarters: Songgang Town, Shenzhen, China

Year Founded: 2008

Certifications: ISO 9001-2008

Employees: 100 employees

Eco Molding Limited is a Chinese company that specializes in the plastic injection molding business. It has been in operation for over a decade since its inception in 2008. Eco Molding has established itself as a leading custom plastic molding company that provides its services to North American and European markets with the help of hard-working employees, quality equipment, and experienced management.

Focusing on different types of plastic mold, Eco Molding offers injection molding solutions for electronics, general industrial OEM products, home appliances, and automotive industries. The company also maintains high levels of transparency by providing its customers with direct factory prices, which helps to build trust and credibility.

Eco Molding Co. Ltd. has over, occupies an area of over 2,000 square meters, and has capital assets of over 8 million RMB. With such resources, the company has the capacity to produce 40 to 50 plastic injection molds monthly.

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Plastic Injection Molding Companies in China

Summary

Currently, there are many plastic injection molding companies in China that offers molded plastic chairs, baby toys, home appliances, and other consumer products at reasonable prices. When choosing a plastic injection molding company to work with, it is important to consider aspects such as the cost, reliability, durability, and functionality of the product. All of the aforementioned companies can help you bring your visions to life, so choose the one that meets your needs. If you are looking for custom on-demand manufacturing solutions from top custom plastic injection molding companies or plastic mold injection companies near me, go nowhere.

Sincere Tech, as one of the top 10 plastic injection molding companies in China, we specialize in injection mold and injection molding manufacturing, and we export our high-quality plastic parts to over 100 satisfied customers worldwide. We sincerely hope to serve you in the near future, ensuring your satisfaction and that of our other satisfied customers.

The production of thermoplastic plastic products involves a variety of commercial methods. Each has its own specific design requirements as well as limitations. Usually, part design, size, and shape clearly determine the best process. Occasionally, the part concept lends itself to more than one process. Because product development differs depending upon the process, your design team must decide which process to pursue early in product development. This section briefly explains the common processes used for thermoplastics from Bayer Corporation.

Today, many companies purchase injection-molded parts from Chinese plastic injection molding companies.  If your business requires injection-molded parts, you should seriously consider this option.

Do you require injection molding services, or are you seeking a China-based injection mold company to create plastic molds and manufacture the injection-molded parts for you? Send us an email, and we will reply to you within two working days.

If you are interested in learning more, please visit our other injection molding page.

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Top 10 Mold Manufacturers in China

Injection Mold company

Chinese Top 10 Mold Manufacturers

Molding is a process of shaping liquid resins or malleable raw materials by pouring them into a mold. China’s mold manufacturers significantly influence the production of numerous indispensable molded products. However, selecting the right mold manufacturer is not an easy task and somehow agitating because there are many options in China. To make your search easier, we have made a list of the top 10 mold manufacturers in China. Therefore, you will not have to spend your time aimlessly surfing the web.

Moreover, we have seen a rising trend in 3D printing in India. Although it is not yet a significant industry in India, it is showing signs of growth in the near future. This article covers information about plastic mold manufacturers in China, their key products, and so much more to learn about. 

Below are listed the top 10 mold factories in China that could offer you custom plastic injection molds and molding services, especially a plastic mold factory in China named Dongguan Sincere Tech Co., Ltd., which is an all-in-one services company in China.

Top 10 mold manufacturers in China

Let’s explore the top 10 mold manufacturers in china.

1. Dongguan Sincere Tech Co., Ltd

China mold company

Year Established: 2015

Location: GuangDong Province: Dongguan city.

Industry Type: Plastic Injection Molding, Die Casting, Machining, and Surface Finish.

Sincere Tech has been in existence for over 19 years providing the best molds and parts at reasonable prices and high-quality standards. They have specialized in plastic injection molding which makes them set apart to fulfill various industry needs from aerospace, and medical, to consumer products.

Key Features:

Client Satisfaction: They value their customers by providing NDA agreements and great after-sale services to put clients’ satisfaction at the top.

Transparency: Their valued customers get raw materials descriptions, and product test results for more confidence in dealing with each other. Also, you will get a competitive price budget as per your needs within your constrained budget.

Products & Services:

  • Molds for electronics, household appliances, storage, hair beauty tools, medical devices, and more.
  • Furniture, baby products, and automotive parts templates.
  • Plastic injection molding and 3D printing and insert molding.
  • Other services include CNC machining, over-molding, aluminum die casting, plastic product design, and prototype manufacturing.

Dongguan Sincere Tech Co. Ltd is a one of the top 10 mold manufacturers in China that provides high-standard quality solutions in the plastic molding industry with quality and customer satisfaction.

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2. Bluestar Technology Group Co., Ltd.

mold manufactuer China

Year Established: 2003

Location: Guangdong, China

Industry Type: Automotive Parts Production, Research and Development, and Tooling.

Bluestar Technology Group Co., Ltd. is an injection mold China company that has been in the auto parts manufacturing industry for more than two decades. Bluestar has a large workforce of over 800 employees and is a national and municipal high-tech enterprise with ISO9001, ISO14001, and IATF16969 certifications. The company is focused on offering the best auto parts and complete molding services for the automotive industry.

Key Features:

Client Satisfaction: Bluestar is committed to providing the best products to customers through its strong R&D and manufacturing systems.

Transparency: The company provides detailed information about the raw materials and test results of the products to gain the trust of their customers. They also offer competitive pricing that is flexible to meet the budget needs of the customers.

Products & Services:

  • Auto Parts Production: Comprises vehicle headlights, interior trim components, double shot molding products (2K products), and air treatment systems.
  • R&D Center: Engaged in the design and manufacture of auto accessories, parts, and systems.
  • Manufacturing Services: Machining technology for precision auto parts injection molding.

Bluestar Technology Group Co., Ltd. is one of the top 10 plastic injection molding companies in China that provides quality solutions in the auto parts manufacturing industry and is dedicated to quality, innovation, and customer satisfaction.

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3. TEC Mold Holdings Limited

mold manufacturers in China

Company Name: TEC Mold Holdings Limited.

Year Established: 2000

Location: Shenzhen and Dongguan, Guangdong Province, China.

Industry Type: Injection Molding Tooling, Plastic Injection Molding, Secondary Operations.

TEC Mold Holdings Limited was founded in 2000 and is a Mold factory in China that offers a full range of manufacturing services. TEC Mold has become a reliable “one-stop manufacturing service” provider with a manufacturing area of 50,000㎡ and a team of more than 650 employees. Certified to ISO 9001:ISO/TS16949:2009 standards, the company is recognized as a high-tech enterprise in China.

Key Features:

Extensive Facilities: TEC Mold has four factories in Shenzhen and Dongguan with four divisions: Precision Mold Shop, Large Mold Shop, and Injection Molding with Secondary Operations.

Quality Assurance: TEC Mold has separate teams for Quality, Project Management, Design, Engineering, and Manufacturing to ensure quality in all its processes.

Diverse Market Presence: The company serves different sectors including Automotive, Medical and Healthcare, Aerospace, Electronics, Household, Telecommunication, Construction, and Security.

Products & Services:

  • Plastic Injection Tooling: Precision tooling for automotive parts, medical devices, household appliances, aircraft parts, and other products.
  • Injection Molding: High-quality injection molding services for the industry.
  • Secondary Operations: Other services such as spray painting, UV coating, assembly, and so on.

TEC Mold Holdings Limited is a Chinese mold company that is dedicated to providing high-quality manufacturing services, innovation, and customer satisfaction in various industries.

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4. Jabil One

injection mold china

Company Name: Jabil One

Year Established: 1966

Location: International operations with more than 100 sites in over 20 countries.

Industry Type: Injection mold Manufacturing Solutions, Engineering, Supply Chain Management.

Jabil One is a global manufacturing solutions provider established in 1966 and currently present in over 100 locations across the world. Jabil One is a mold company in China that has been in operation for more than 50 years and has a team of professionals who are committed to providing engineering, manufacturing, and supply chain solutions to its clients.

Key Features:

1. Global Reach: Jabil One has a global presence with a wide range of solutions that are scalable and tailored to the needs of clients in various industries.

2. Comprehensive Expertise: The company integrates technical skills, design skills, supply chain knowledge, and global product management to offer the best solutions for the world’s top brands.

3. Environmental Responsibility: Jabil One is committed to creating sustainable processes that are environmentally friendly and responsible.

4. Advancements & Excellence: Jabil One aims to make anything possible and everything better in the future world.

Product & Service

  • Advanced Assembly Solutions: The miniaturization of electronics and the convergence of complex technologies.
  • Circular Economy Initiatives: Sustainable materials, modular design, and supplier collaboration for environmentally sustainable products.
  • End-to-end Manufacturing: Offering end-to-end manufacturing services for sectors such as automotive, healthcare, consumer electronics, and others.

Jabil One is a global plastic injection molding manufacturing solutions provider that works with the world’s most innovative companies to achieve success, drive innovation, and make a difference in the lives of people and the planet. Tehy have a mold facotry in China and Europe.

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5. DongGuan Wellmei Industrial Co. , Ltd.

China mold company

Year Established: 1988

Location: Dongguan City, Guangdong Province, China.

 Industry Type: Plastic Mold Injection, Plastic Products Manufacturing, Surface Treatment, Assembly, and more.

Wellmei Industrial Co., Ltd. has been a leading manufacturer of plastic mold injection for over 30 years. Established in 1988, we have developed into a professional manufacturer of plastic mold, plastic products, surface treatment, assembly, and other related services. We have established a reputation for quality and customer service in the market.

Key Features:

  • Quality Commitment: Wellmei is committed to providing quality products and services through quality assurance and quality improvement in production.
  • Transparent Operations: We are committed to transparency and disclose information about the source of raw materials, product testing, and competitive pricing to build customer confidence.
  • Diverse Products and Services: Our products include a wide variety of plastic products like auto parts, medical devices, home appliances, OA devices, mobile communication terminals, and so on. We also offer plastic mold manufacturing, surface treatment, assembly, and other services.

Products & Services:

  • Plastic Mold Manufacturing: Specializing in different types of molds like E-mold, 2Kmold, and IML mold.
  • Plastic Products Molding: Injection molding for automotive, medical, consumer electronics, and other industries.
  • Surface Printing and Coating: Surface treatments: Aesthetic and functional improvements to products.
  • Assembly: Offering complete assembly services for finished products or semi-finished products.

DongGuan Wellmei Industrial Co., Ltd. is dedicated top 10 injection mold manufacturers in China to providing the best solutions, quality, and services in the plastic mold injection industry.

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6. Richfields Corporation

China mold company

Year Established: 2001

Location: Dongguan City, Guangdong Province.

Industry: Injection Mold Manufacturing

Awards and Certifications: ISO/TS 16949/2009, GMP Certified.

Richfields Corporation is a well-known mold factory in China that creates molds of the best quality and at an affordable price. They employ cutting-edge technology and with over 30 years of experience, they are incomparable in their professionalism and inventiveness. The strategic position and customer-oriented approach of these brands are the main reasons why they are selected by most leading companies across the globe.

Richfields exports to countries such as France, Germany, the USA, the UK, Brazil, and others. They are not limited to just plastic injection mold making, they also offer a range of additional services such as hot runner and cold runner molds, over molds, and rubber molds, assembly, among others. Their expertise spans from precision plastic injection molding to gas-assist injection molding and the production of large safety products such as hooks, edge covers, door stoppers, straps, and cord winders.

If you are looking for mold factory in China who also have mold manufacturers in the world, then you may contact them for a quote.

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7. Huizhou Djmolding

China mold company

Year Established: 2010

Location: In the city of Huizhou, Guangdong Province, China.

Industry: Injection Molding Manufacturer

Awards and Certifications: ISO 9001:2008 Standards

Huizhou Djmolding Co.Ltd is one of the most professional plastic mold factories in China, which is the main business of our company. They are famous for providing best-in-class molds using advanced cutting-edge machines and technologies that guarantee the customer’s high trustworthiness.

Services & Products Offered:

  • Rapid prototyping services and prototype injection molding are the most cost-effective methods for finalizing the design and making it ready for mass production.
  • Automotive injection molding
  • CNC machining and milling services, which are highly precise.
  • old and die-making.
  • Plastic molding manufacturing
  • Injection molding tooling and injection blow molding by using advanced technologies.
  • Home appliance molds
  • Injection mold design and manufacturing are among the leading services offered by our company.
  • Customized plastic injection molding.
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8. SINO MOULD

injection mold china

Year Established: 1999

Location: The Huangyan Taizhou, Zhejiang Province, China.

Industry: Plastics Injection Mold Manufacturing Process, Atomotive Injection molds

SINO MOULD is a plastic injection mold manufacturer in China that has a global reputation and supplies products across countries such as the UK, USA, France, and Spain. They claim to ensure 100% customer satisfaction by providing guarantee and warranty services, and also by delivering quality molds at low prices and within a short time period.

Services & Products Offered:

  • Home and household molds and home appliance molds.
  • The molds and molds of the packaging and high precision are required.
  • Industrial molds like for example refrigerator molds and drippers.
  • The dies for the pipe fitting connector and thin wall container shall be machined.
  • Medical and mold of components and paint molds.
  • The manufacture of automobile molds, crate molds, and air conditioner plastic injection molds.

If you are looking for mold manufacturers in China that offers automtoive injection molds with big size, you could contact them for a quote.

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9. Sakura Tech

injection mold china

Year Founded: 1995

Location: Shanghai

Company Type: Manufacturing

Key Products: Injection Molds

Sakura Tech, founded in 1995, has become a top producer of plastic moldings. Their specialty covers processes like overmolding, rotational molding, and compact molding among others. They are popular for providing top-quality and durable interiors to exterior parts of automobiles, and aircraft. The company is headed by a team of talented designers and engineers who are known to be responsible for such legendary products.

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10. TK Group(Holdings) Limited

injection mold china

Year Founded: 1983

Location: Shenzhen, Suzhou,  Huizhou, Vietnam  and Germany

Company Type: Manufacturing

Key Products: Injection Molds, custom plastic injection molding, high precision injection molds, medical precision injection molds.

TK was established in 1983 in Hong Kong. After 40 years of development, TK Group now is a well-known enterprise in plastic injection and molds making. TK was successfully listed on the main board of Hong Kong Stock Exchange in 2013, stock code: 02283. An independent market research company IPSOS reported that the TK’s plastic mold business revenue was ranking No 1 in the MT3 level suppliers in China.

TK is a leading plastic mold and injection molding company in the China, which serves industries like consumer appliances, automotive, electronics, and others. The adoption of the latest manufacturing technology in automation processes has greatly contributed to their enduring success in the face of the growing competition from newcomers in the market.

If you are looking for mold manufacturers in China that offers high precision injection mold, and medical precision mold, you may contact them to quote for you.

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End Notes

The Chinese industrial landscape is a busy one and it is easy to get lost in the numerous industries to find the best that suits your intended requirements. To make the search easier, we have collected the necessary information about injection mold manufacturers in china and pointed out the top mold manufacturing companies in the area.

Plasticmol.net is the right choice and serves as a one-stop solution to meet all your molding needs because of providing high-quality products at competitive prices. We have a transparent pricing policy. Discover our wide range of products and services from wider prospects, which are conveniently available in the same place.

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Mold Design For Injection Molding

Plastic injection molding tool

The first step in mold designing for injection molding is to obtain the necessary data. This entails figuring out how many cavities there will be, choosing the material for the mold, and gathering relevant information. This may necessitate working with specialists like material engineers and tool makers,  cost analysts. Even though the molding material is usually not chosen by the mold designer, successful mold design requires a grasp of several important factors. Check the plastic part ribs design tips.

Material Choice for Mold Design

Understanding the properties of the molding materials is essential when designing injection molds. varying materials and even grades have different shrinkage rate, so it is import to confirm this first thing before start mold design, because if the shrinkage have set in the mold design, later on you can not change to other shrinkage material, because that will change to the part dimensions. Some plastics are better at absorbing and dissipating heat, which affects how well the mold cools down. This may affect where the mold’s cooling channels are located, and gate, runner, and vent designs are greatly influenced by the plastic’s viscosity.

Considerations for Shrinkage

A key consideration in mold design is shrinkage rate, or the contraction phase that occurs in polymers. The amount that a part will shrink after being taken out of the mold is determined by the shrinkage factor that is allocated to each type of plastic. Plastics can shrink in an anisotropic or isotropic manner. Similar to amorphous materials, isotropic materials shrink uniformly in all directions. On the other hand, anisotropic materials—which are frequently crystalline—may exhibit greater shrinkage along the flow direction.

For example, to attain the necessary size after shrinkage, a 6-inch product with a shrink factor of 0.010 in./in. needs a mold cavity of 6.060 inches. The three categories of shrink factors are as follows: low, which falls between 0.000 in./in. and 0.005 in./in., medium, which falls between 0.006 in./in. and 0.010 in./in., and high, which falls beyond 0.010 in./in.

Shrinkage rate

Applying shrink factors to each inch of the product has an effect on all of its dimensions. Three categories of shrinkage—low, medium, and high—have an impact on the dimensions of the mold cavity. Shrinkage may be impacted by mold temperature fluctuations as well as modifications to the product’s wall thickness. It’s difficult to estimate shrinkage; material suppliers, moldmakers, and seasoned molders must all weigh in. if you are not know what shrinkage should you use, no need to worry, only need to tell us about the material you prefer to use for your project, and we will handle the rest for you.

Below table is shrink rate for most popular materials

Full name of Material Short name of material Min to Max Shrink Values
Acrylonitrile Butadiene Styrene ABS .004 – .008
Acrylonitrile-Butadiene Styrene/Polycarbonate PC/ABS .004 – .007
Acetal POM .020 – .035
Acrylic PMMA .002 – .010
Ethylene Vinyl Acetate ( EVA .010 – .030
High Density Polyethylene HDPE .015 – .030
Low Density Polyethylene LDPE .015 – .035
Polyamide – Nylon (PA) Filled 30% Glass Fiber PA+30GF .005 – .007
Polyamide – Nylon (PA) Unfilled PA .007 – .025
Polybutylene Terephthalate PBT .008 – .010
Polycarbonate PC .005 – .007
Acrylonitrile Styrene Acrylate ASA .004 -. 007
Polyester .006 – .022
Polyetheretherketone PEEK .010 – .020
Polyetherimide PEI .005 – .007
Polyethylene PE .015 – .035
Polyethersulfone PES .002 – .007
Polyphenylene PPO .005 – .007
Polyphenylene Sulfide PPS .002 – .005
Polyphthalamide PPA .005 – .007
Polypropylene PP .010 – .030
Polystyrene PS .002 – .008
Polysulphone PSU .006 – .008
Polyurethane PUR .010 – .020
Polyvinyl Chloride PVS .002 – .030
Thermoplastic Elastomer TPE .005 – .020

Determining Cavities in Mold Design for Injection molding

Finding out how many cavities are required is an important first step before discussing mold size and equipment requirements. This parameter is crucial in determining how much can be produced by the injection molding process in a specific amount of time, together with the overall cycle time.

The yearly production volume targets for a certain product are directly related to the number of cavities needed. For example, the computation requires knowing the annual production time available if the goal is to create 100,000 units on average annually. This is 6,240 hours a year (52 weeks * 5 days/week * 24 hours/day), assuming a typical workweek of five days and 24 hours per day. Then, every month has an average of 520 available hours (6,240 / 12).

Estimating Cycle Time

Estimating the cycle time is essential to figuring out how many cavities are needed. The thickest wall portion of the item being molded has the biggest impact on the cycle time. A guideline for this estimation is shown in Figure 2-3, which takes into account the assumptions of an appropriately sized molding machine and typical injection process times. Although cycle times may vary significantly depending on the material, the chart provides a useful starting point.

Once the total cycle time has been approximated, the number of cycles per hour can be computed by dividing the estimated cycle time by 3,600, which is the number of seconds in an hour. For instance, 100 molding cycles are produced per item if the maximum wall thickness is 0.100 inches and the cycle time is roughly 36 seconds.

Cavities and Production Scale

Suppose we have an annual requirement of 100,000 units. To satisfy this criterion, a single-cavity mold would require about 1,000 hours, or 8.33 weeks. As an alternative, the production time might be cut in half to 4.16 weeks with a two-cavity mold. A two-cavity mold’s financial ramifications, however, must be carefully considered.

A single-cavity mold operating nonstop would not be feasible for larger manufacturing numbers, such 10 million units annually. In this instance, 624,000 units might be produced annually using a 16-cavity mold. Multiple molds with 16–32 cavities each might be considered, with production spaced out over three to six months, in order to reach 10 million pieces. However, it’s important to assess aspects like cost and the availability of molding equipment.

Selecting the Right Material for Injection Mold Design

Choosing the appropriate material for injection mold design is a critical aspect that significantly influences the efficiency and effectiveness of the molding process. Various materials, ranging from steels to alloys and even aluminum, offer unique characteristics catering to different molding requirements.

Steels

  1. 1020 Carbon Steel: Ideal for ejector plates and retainer plates due to its machinability. Carburization is required for hardening.
  2. 1030 Carbon Steel: Used for mold bases, ejector housings, and clamp plates. Can be easily machined and welded, with the potential for hardening to HRC 20-30.
  3. 4130 Alloy Steel: High-strength steel suitable for cavity and core retainer plates, support plates, and clamping plates. Supplied at 26 to 35 HRC.
  4. S-7 Tool Steel: Shock-resistant with good wear resistance, used for interlocks and latches. Hardened to 55-58 HRC.
  5. P-20 Tool Steel: Modified 4130, pre-hardened for cavities, cores, and stripper plates. Supplied at HRC 28-40.
  6. S136 stainless steel: This is one of the best harden material for cavities, cores, inserts an other forming mold components, hardened to 50-54 HRC.
  7. NAK80 high polishing steel: Used for high glass surface finished cavities, cores and other mold inserts, pre-hardened to 38-42HRC.
  8. 1.2344 and 1.2343 steel? This is harden steel that mostly used for cavities, cores, and other mold components, hardened to 50-54 HRC.

Aluminum

The most common aluminum grade for molds is 7075 (T6). This aircraft-grade alloy, when anodized, achieves a surface hardness of up to 65 Rc for enhanced wear resistance. It can be used for the entire mold, and its surface tends to self-smooth, reducing mold build and injection molding cycle times.

Beryllium-Copper Alloys

These alloys, such as CuBe 10, CuBe 20, and CuBe 275, are often used as components fitted to steel or aluminum mold bases. They assist in heat dissipation, particularly in areas with challenging cooling channel placements. The hardness ranges from Rb 40 to Rc 46.

Other Materials

While less common, other materials like epoxy, aluminum/epoxy alloys, silicone rubbers, and wood can be used for molds, primarily for small-volume or prototype production (typically under 100 pieces). These materials are not suited for high-volume production due to their limited durability and may be more appropriate for prototyping purposes.

In recent times, aluminum, especially the 7075 alloy, has become a viable option even for high-volume production, challenging the traditional perception of aluminum being suitable only for low-volume or prototype molds. The choice of mold material should align with production volume requirements, material compatibility, and the specific characteristics needed for the molding process.

Surface Finish and Special Requirements in Mold Design for injection molding

When it comes to molded product design, getting the right surface look is important, both aesthetically and in terms of making finishing touches like brand logos or ornamental artwork easier to apply. The parameters of the injection process and the state of the mold cavity have a direct impact on the molded surface quality. Mold designers cannot control processing parameters, but they must specify criteria for specific appearances in order to fabricate molds with the right surface conditions.

Different machining techniques produce different degrees of surface roughness on mold surfaces, which affects the finishing procedure. For example, common finishes produced by Electrical Discharge Machining (EDM) range from 10 to 100 microinches (250 to 2,500 micrometers). It may only take less than 1 microinch (25 micrometers) to get a mirror finish.w hile an average reading for most parts might fall between 20 to 40 microinches (500 to 1,000 micrometers).

A smoother cavity finish reduces the hills and valleys that are produced during machining, which usually makes it easier to eject molded pieces. The effect of EDM on cavity surface roughness is shown in Figure 2-4, which highlights the necessity of appropriate stoning and polishing in order to provide the required smoothness. For mold cavity surface finishes, the Society of the Plastics Industry (SPI) has created standards. There are three levels (1, 2, and 3) in each grade (A, B, C, and D), with A-1 being the smoothest finish and D-3 being a coarse, dry-blasted finish.

Although a flat surface facilitates ejection, too smooth surfaces might generate a vacuum, especially when using stiff, hard resins. In these situations, a small amount of surface roughening on the metal aids in removing the vacuum and enables appropriate part ejection.

If post-molding finishes are applied, the molded part’s surface requires preparation. For polyolefins, oxidation of the surface is necessary to facilitate the adhesion of paint, dye, hot-stamps, or other decorative finishes. Minimizing the use of mold release agents during injection molding is advisable to avoid interference with adhesion, further emphasizing the importance of a highly polished mold surface.

Identifying surfaces designated for post-molding decoration on product drawings is essential. This notification ensures that moldmakers and molders recognize critical areas requiring special attention in the finishing process.

Gate Method and Location

The final quality, appearance, and physical attributes of a molded product are influenced by the gate’s location and the type of gating system employed. Ideally, the cavity should be gated so that the molten material enters the thickest section of the part first, as illustrated in below picture.Gate location

This concept is grounded in the behavior of molten plastic molecules, which tend to occupy available space and seek equal air distribution. Placing the gate in the thickest part of the cavity forces the molecules together, compressing them as they travel into the cavity. This compaction expels air between the molecules, resulting in a densely packed molecular structure and a molded part with optimal structural integrity.

Contrarily, gating at the thin end allows the molecules to expand, increasing the air spaces between them and leading to a weaker molecular bond. This results in a molded part with low structural integrity.

While the ideal gate location and design will be explored in a subsequent chapter, it is crucial to recognize potential gate locations at this stage. Identifying these locations enables proactive communication with the product designer to address any issues. Gates, regardless of type, will leave evidence, known as a vestige, either protruding from or broken into the molded part. It will never be perfectly flush with the molded part. If the vestige hinders the function, appearance, or intended use of the molded part, the gate may need relocation, a decision in which the product designer should be actively involved.

Ejector Method and Location

After the molten plastic has solidified within the mold, the final molded product needs to be ejected from the mold. The predominant method for this task involves the use of ejector pins, which are employed to push the molded part out of the cavity where it took shape, as depicted in below picture.Ejector location

To optimize the ejection process and minimize stress, it is advisable to use ejector pins with a larger diameter. This ensures an even distribution of ejection force across the molded part, reducing the risk of cracks or punctures caused by insufficient ejector area. Ideally, ejector pins should be strategically positioned to apply force to the strongest areas of the part, such as near corners, under bosses, and close to rib intersections. Although round ejector pins are the most common and cost-effective, rectangular cross-sections are also viable.

Similar to gates, ejector pins leave traces on the molded part. Due to the continual expansion and contraction of various mold components during the molding process, achieving perfect flushness with the part’s surface is challenging. Consequently, if the pins are too short, they leave a protrusion or excess plastic pad, known as a witness mark, as illustrated in below picture. Conversely, if the pins are too long, they create impressions in the plastic part.

mold design for injection molding

It is crucial to strike a balance in pin length. Excessively long pins can lead to the molded part remaining on the ejector pins, posing the risk of damage if the mold closes on the non-ejected part. Consequently, it is prudent to intentionally keep the pins short, resulting in a thin pad of excess material. Product designers must be informed of the intended locations of ejector pins and the resulting witness marks to make informed decisions regarding acceptance.

If the witness marks are deemed unacceptable due to functional or aesthetic considerations, alternative ejection methods, such as a stripper plate or an advanced air blast system, may need to be explored. Alternatively, repositioning the part in the mold to allow for the relocation of ejector pins is another option, albeit one that may incur higher mold costs.

Location of Cavities and Cooling Channels

When employing a single-cavity mold, it is optimal to position the cavity at the center of the mold. This configuration facilitates sprue gating, creating favorable conditions for the molding process. Material injection occurs directly into the cavity, minimizing travel distance. With no constraints, injection pressure can be reduced, and stress is effectively minimized. These conditions are sought even in multicavity molds.

In the case of multicavity molds, it is essential to place the cavities as close to the center of the mold as possible. However, considerations must be given to the need for ejector pins for both the parts and the runners responsible for transporting material to the cavities. Additionally, cooling channels must be strategically placed in the mold plates to bring coolant, typically water, as close to the mold cavities as possible without compromising the integrity of the steel and causing water leaks.

It is important to carefully position the cavities to avoid interference with mounting bolts and ejector pins. As the number of cavities increases, the layout becomes more intricate, making the process more challenging. A general guideline is that cooling channels should be situated no closer than twice their diameter from any other object, as depicted in below picture. This ensures there is enough surrounding metal to minimize the risk of breakthrough.

Cooling channels for injection molding

An ideal layout for a multicavity mold resembles spokes in a wheel. This layout allows the cavities to be positioned as close as possible to the center of the mold and eliminates right-angle turns in the runner system. Such turns result in a 20% pressure drop for each turn, necessitating an increase in the runner diameter to maintain proper material flow. This escalation leads to higher material costs and longer cycle times and should be avoided whenever feasible. below picture illustrates a typical spoke layout for an eight-cavity mold.

8 cavity mold design

Despite the advantages of the spoke concept, it comes with a limitation on the total number of cavities possible within a given mold size. A squared pattern, as shown in Figure 10, can accommodate more cavities. However, squared patterns introduce turns in the runner system, often represented as right angles. Right-angle turns demand additional injection pressure to propel material through, prompting a 20% increase in the primary runner diameter to balance pressures. If squared patterns are necessary, it is preferable to have runners with sweeping turns instead of right angles,

square layout for mold design

Figure 10

Regardless of the runner system employed, ejector pins are essential for ejecting both the runner system and the molded part. Therefore, the cavity layout must consider not only the proximity of cavities to the mold’s center for minimal material travel but also how to avoid placing ejector pins (and mounting bolts) in the middle of cooling channels.

Above items are only a general requirements regarding mold design for injection molding, there will be some more requirement, such as Venting Concepts, Dimensioning of Mold, mold slider or lifter, and so on, to design a mold is not easy skill. if you want to have mold design for injection molding, you can contact us for a quote.

Injection Mold Design Case Study from Sincere Tech – DFM Anylisis

In order to be able to think in the same way within SinereTech, and to be able to use dimensions that are suitable for all applications we have created the following guidelines. Those mold design guidelines will be used by the calculation engineers as well as a base for our designers in case of any Injection mold project, and sometimes we may call this as DFM report anylisis as well.

  1. Injection gate and overall layout.

    1. Generally, the injection gate will be placed along the longest side of the part and the injection gate cylinder will be on the closest distance to that side (runner will normally not go around the cavity like a banana).
    2. If sliders are used or if other factors may influence the placement of the injection gate or runner, provides some gate location suggestion and ask the customer which gate location they prefer. Agree with a solution before the mold design. Then the general layout will be suitable for almost all mold.Die Casting Mold Design

  2. Distance between the cavity edges and the insert edges.

    1. For normal cases, except for injection molds with bigger sliders or “deep” parts, use the distance 50-80mm. The upper limit is used for “bigger” parts and the lower limit is for smaller parts.
    2. For plastic injection molding tool with bigger sliders the distance can be up to 90-100mm, especially when it concerns the two sides to right and left from the slider side.
    3. For really deep parts the distance may be bigger than 100mm, but then we should ask the customer for advice if suitable the customers injection molding machine.
    4. For really small parts the minimum distance of 50mm is used.
    5. The distance for the side towards the injection cylinder is the same as for the other sides, but about 10-15mm on top of that.
    6. In case we would like to optimize this distances. This can preferably be used for this type of die casting tools

  3. Distance between cavities.

    1. Generally, between each cavity, a distance of 30-50mm is used for most cases.
    2. For really small parts the distance of a minimum 15-30mm is used.
    3. For really deep parts the distance is generally bigger than 50mm, but then we should ask the customer for advice if the injection mold size is fitting to the customer’s machine.
    4. For cases when the runner is between the cavities the distance will be min 30-40mm between each cavity, use use banana gate then the desitance between each cavity will be extra 10mm more.

  4. Distance between the edge of the insert and the edge of the mold base.

    1. Generally (for normal cases) the rule is to use the same distance as what is used for injection moulding (as long as the part do not require big sliders). That includes bigger parts, deeper parts and parts requiring smaller sliders. That means a distance of 60-90mm is OK for most molds.
    2. For molds with big hydraulic sliders, there is a need to increase the distance with 50-200mm on top of the normal distance (more than what would have been needed for injection moulding). However, for those cases, we should ask the customer for approval. One question is also how asymmetrical the mold can be in case a big slider is only used on the right or left side of the mould.

  5. The thickness of A/B plates and inserts.

    1. The thickness for both the inserts and A/B plates are mainly controlled by the part projected area. As a rule of thumb thicknesses specified in below table will be used when designing die casting molds. The projected areas are specified in cm2. For big projected areas or deep moulds it is recommended to ask the customer for approval. There may be formulas to use in case those dimensions will be optimized

Projected area (cm2) The thickness between the insert edge and backside of A/B plate The thickness between the cavity edge and backside of the insert edge
A-plate B-plate Insert-A Insert-B
1-100 35-40 40-45 35-40 38-40
100-300 40-60 45-70 40-45 40-45
300-600 60-80 70-100 45-50 45-55
600-1000 80-110 100-130 50-60 55-65
1000-1500 110-140 130-160 60-65 65-70
>1500 ≥140 ≥160 ≥65 ≥70

Finally if you are not sure what is best mold design solutions for your injection mold, you are welcome to contact us, we will offer you mold design, mold production and injection molding manufacturing service.

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Wire EDM Machining

Wire cutting machining

The Wire EDM machining is a non-conventional contemporary electrothermal technique that employs electric sparks to erode material from a targetted material (Job material). It can cut to shape intricate design prototypes and is also employed to shear parts in large volumes with high dimensional stability. Small contours or microholes can be easily shaped using a standard wire EDM machine with minimal tool wear. It is a more precise and accurate process than conventional metal-cutting techniques. One of its core features is that it can nearly pierce down any high-strength and conductive material and shape complicated geometries without any mechanical force. This blog post highlights the enormous potential of wire EDM cutting machining, discussing their applications, types, and shearing capabilities.

Wire EDM: An Introduction To Process

In the metalworking industry, Wire Electrical Discharge Machining (Wire EDM) is presumed to be an exact and accurate technique that uses a thin wire(electrode) charged electrically to shear metals. The wire runs in a dielectric fluid that cools the material and removes the eroded particles as well.

Wire EDM machining does not remove material through direct cutting but rather uses an electrical discharge to erode the material. Instead of cutting it, it melts or vaporizes it, which gives the tool great precision and produces very little shavings. This process is beneficial for making parts that are challenging to machine using conventional techniques if the materials are electrically conductive.

How does wire EDM work?

The Wire EDM process is simple but very efficient. It begins with the immersion of the workpiece in a dielectric fluid and placing it on a vise. A thin wire with an electrical charge is then passed through the workpiece. The workpiece being conductive, acquires the opposite charge to that of the charging roller.

As the wire approaches the workpiece, an electric arc is formed across the gap and this causes the generation of heat that melts or vaporizes a small amount of metal. These sparks work as the cutting tool and continue to shave the workpiece to the required shape.

Throughout the entire process, deionized water is used to regulate the machining environment and to remove the metal particles eroded by the process. This arrangement makes it possible to achieve very fine and accurate cutting and finishing of the parts, especially when the parts are complex and require a high degree of accuracy.

Wire EDM machining

Wire EDM Machine Parts

Here are the main wire edm machine parts listed below;

  1. CNC Tools

Wire EDM is automated by CNC tools that regulate the sequence of the wire path and the cutting process. These tools are very important for the accuracy and efficiency of the operations since the level of sophistication of these tools determines the level of errors and machining time.

  1. Power Supply

The power supply unit provides electrical impulses to both the wire electrode and the workpiece, which varies from 100V to 300V. It controls the rate and magnitude of these charges, which are crucial for material removal.

  1. Wire

The wire produces the electrical discharge potential by making it the electrode. Its diameter, usually varying from 0. 05 to 0. 25mm, is selected depending on the shape and thickness of the job material. When choosing the wire for cutting, consider fracture resistance, impact resistance, conductivity, vaporization temperature, and hardness.

Common wire types include:

  • Brass Wires: These are famous for their excellent conductivity and are produced from copper and zinc combined at a ratio of 63% and 37%, respectively. Zinc content raises the cutting speed but should not be more than 40% as it causes corrosion.
  • Zinc-Coated Wires: These wires have a layer of pure zinc or zinc oxide which improves the machining rate.
  • Diffusion-Annealed Wires: These wires are produced through diffusion annealing and contain more than 40% of zinc, which makes them ideal for large scale production and cutting through different materials.
  1. Dielectric Medium

The wire EDM machining process is carried out in a tank containing dielectric fluid, typically oils or deionized water. This medium also reduces the rate of the process, avoids the formation of a layer on the wire electrode, and provides a smooth surface finish on the workpiece.

  1. Electrodes

In wire EDM machining, the wire tool acts as a positively charged (cathode), while the workpiece acts as a negatively charged (anode) of the electrical circuit. A servo motor (controller) creates a gap of 0.01 to 0.5 mm in the wire so it does not touch the workpiece during cutting, which is critical for accuracy and helps avoid fractures in the intended workpiece.

Wire EDM machining service

 

What Materials Types Can Be Cut by a Wire EDM Machine?

Wire EDM machining is very useful and can cut almost any electrically conductive material and produce complex geometries and contours. Here are some common materials that can be effectively cut using a Wire EDM machine

Aluminum

Aluminum is one of the most versatile metals that has high thermal and electrical conductivity. Wire EDM machining is naturally soft, which means that during the machining process, gummy deposits can build up; however, Wire EDM can manage this issue and achieve exact cuts.

Titanium

Wire EDM machining is best suited for Titanium because it is sticky and generates long chips. The process can handle these properties effectively. Deionized water as the dielectric medium assists in minimizing heat production and thus makes the cutting process smooth and easier.

Steel

Wire EDM is advantageous to steel since it is a strong metal. This process is often used in preference to CNC machining for steel because of the latter’s ability to manage the material’s hardness. However, steel produces a lot of heat and hence, necessary precautions have to be taken in this regard.

Brass

Due to its high tensile strength, brass is comparatively easy to cut with Wire EDM. Because it is relatively soft, the cutting speed should be relatively slow so as not to cause the material to deform and thus affect the accuracy of the cut.

Graphite

Graphite is relatively difficult to machine using conventional tools because of its inherent brittle nature and particle pull-out problem. Wire EDM, with its sharp wire electrode, can efficiently machine graphite, giving clean and accurate cuts.

These materials are some of the conductive materials that Wire EDM machines can process, making the technology applicable in several industries that demand high precision and intricate designs.

Difference Between Wire EDM & Conventional EDM Machining

Wire EDM machining and conventional EDM are two distinct types of shearing processes. The Wire EDM and conventional EDM work on the same principle but their working and uses are quite different. Here’s a breakdown of how they differ:

Electrode Type

Wire EDM: As discussed above, it uses a thin strand wire that is heated to act as an electrode and which moves to cut to shape the required shape, and size part or product.

Conventional EDM: Uses electrodes made from very conductive materials such as graphite or copper and can be of different geometries. These electrodes are placed into the workpiece, thus producing the ‘negative’ image of the electrodes’ shape.

Machining Speed

Wire EDM: This is ready to start as soon as the wire is positioned, which makes it more efficient and ideal for projects with tight deadlines.

Conventional EDM: The electrodes must be pre-shaped before the machining process, which may take a lot of time, go to electrical discharge machining page to know more.

Accuracy

Wire EDM: Provides high accuracy; it can cut as thin as 0. 004 inches. This makes it suitable for cutting intricate patterns and designs on the fabric.

Conventional EDM: Although it is also used for complex cuts, it cannot be as precise as wire EDM, which makes it suitable for simpler and stiffer cuts.

wire edm machine parts

Advantages and Disadvantages of Wire EDM Machining

Wire EDM Prototype Parts

Pros

Precision: Provides immaculate cuts, which means little or no further processing or finishing is required.

  • Complex Shapes: Conventional CNC machining can help create intricate patterns that are difficult to create from traditional techniques.
  • Small Parts: Suitable for use when working on small and intricate parts that are difficult to handle.
  • Fragile Materials: CNC Wire EDM machines are applicable to materials that cannot be subjected to stresses and are difficult to machine through conventional cutting machinings.
  • Clean Cuts: It doesn’t leave any burr or distortion behind, which means that there is no need for the post-processing.
  • Continuous Cutting: It can cut without stopping the operation and even start cutting again if the wire gets snapped.

Cons

Material Limitations: It is only applicable to electrically conductive materials.

Slower for Thick Materials: Not as effective on very thick or rigid materials as conventional EDM.

Cost: Wire EDM machines can be expensive, especially when one has to factor in the initial cost of the machines.

Maintenance: It needs to be maintained often to keep it accurate and fast.

Knowing these differences and the advantages and disadvantages of Wire EDM can assist manufacturers in determining which technique is more appropriate for their application use.

Applications of Wire EDM Machining

Wire EDM is used across automotive, aircraft, and medical industries, ranging from producing detailed prototypes to mass production parts. Here’s a breakdown of some key sectors that use this cutting-edge technology:

Automotive Industry:

In the automotive industry, where the parts are usually complex in shape and the material used is quite complicated, wire EDM is used. This process does not involve mechanical force and is ideal for creating parts such as bumpers, dashboards, doors, and many others with holes and recesses.

Medical Industry:

In the medicare industry, EDM machines are significant for shaping intricate prototype parts optimally used in equipment such as optometry and dentistry. The process is especially effective when used on metals suitable for medical device production, strengthening the structures of items such as dental implants and syringe parts while adding complex designs.

Aerospace Industry:

Wire EDM also plays a vital role in the aerospace industry. The process adopted for creating aerospace parts that need to have close tolerances down to +/-0.005x, and smooth surface finishing. It works hand in hand with waterjet cutting for parts that cannot withstand heat and stress from conventional cutting tools. This technology has been widely used in the manufacturing of engine parts, turbine blades, landing gear components, and many others for a long time.

Conclusion:

Wire EDM can be considered one of the most accurate and flexible technologies for cutting, which is highly appreciated in industries that require complex shapes and high accuracy. Wire EDM is a particularly valuable technique for cut-to-produce prototyping and mass-produced intricate parts due to its high accuracy and ability to meet tighter tolerances.

Are you looking to source a wire EDM manufacturing project or wire edm machining near me

? Sincere Tech is a well-established manufacturing wire edm machining services company with experience in multiple CNC operations, including wire EDM. These features allow us to achieve accurate cuts on various conductive materials to meet the needs of different parts in multiple industries. If you want to learn more, please contact our EDM manufacturing specialists for more information on your requirements and project details.

FAQ’s

Q1: What is the accuracy or the tolerance limit of Wire EDM in terms of dimensions?

Normally Wire EDM is very accurate, the fast wire EDM can do the tolerances as tight as ±0. 1 millimeters. the CNC wire EDM process can meet 0.05mm tolerance.

Q2. How is Wire EDM different from Laser Cutting?

Wire EDM works by electrical erosion from a wire, while laser cutting uses a high-power thermal beam to cut through materials, and the tolerance is different as well, wire EDM will be more prcision than laser cutting.

Q4. Why is deionized water a vital ingredient in wire EDM?

Wire EDM uses deionized water as the dielectric medium since it has low carbon content. It also serves as a heat sink to ensure that the dielectric temperatures are kept at an optimum level during the machining process.

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Family Mold Injection molding

china family mold injection molding

What is Family Mold Injection molding

Family tool injection molding is among the most significant innovations in the manufacturing sector, as they have significantly enhanced the efficacy and design intelligence of the production process. A family mold is a plastic injection mold that is intended to produce multiple components of a single assembly in a single cycle. This concept facilitates the production of multiple components that are integral to the assembly in a single operation, thereby enhancing efficiency.

Family molds are equipped with multiple cavities, each of which is designed to shape a particular component of the final product in a single production cycle. This feature distinguishes them from multi-cavity molds, which are employed to produce many identical parts or products. Each cavity in a family mold is engineered to generate a distinct component of the final product.

Family Mold Injection molding

family mold

Advantages of Family Molds

Family molds are very efficient and useful because they allow the formation of all the parts of an assembly at the same time in one molding cycle, which is a time saver.

Reduced Cycle Times: Family molds with heated runner molds help in reducing the cycle time. The cooling and ejection phases are shortened, hence the name, due to the fact that the plastic remains in a molten state, which enhances production. The ability to produce a greater number of parts within a smaller period of time is a clear sign of improved operational efficiency.

Cost Savings: In the long run, it may be cheaper to use family molds rather than individual molds for each part of an assembly. They lower the initial costs by doing away with the need for several machinery and minimizing the number of employees. Besides, they also help reduce the need to gather and coordinate the various parts. Therefore, these molds lower post-production expenses on a budget.

Consistent Quality: Family molds are crucial for the end product because they act as a guide. This ability ensures that all the components are made from the same amount of plastic, hence having the same color and quality. This is especially important when the appearance of the objects to be labeled needs to be uniform.

Family Molds’ Limitations:

The disadvantages of family molds’ includes;

Balance Obstacles: Another issue linked with family molds is the inability to get the best fill in all the cavities of the mold. Even simultaneous filling can be a challenge if the thickness of the walls or the sizes of the parts are altered.

Maintenance and Downtime: The entire family mold may need to be closed for repair or replacement if one of the mold components is damaged or worn out. This can result in a situation where the devices are kept idle for a longer time, thus affecting production schedules and productivity.

Material Restrictions: Hot runner systems are optimally used for thermoplastics, but some of the materials may be sensitive to heat. The durability of the elements will also be affected since these materials will be exposed to heat for a longer period.

Design Restrictions: There is a likelihood that family molds are not suitable for all aspects of the design. The parts must made with the same material and dimensions and to be filled and cooled at the same rate.

Applications of Family Mold Injection Molding

Familiy molds help in maintaining the quality of the assembly components where the color and material of the components should be similar.

Complex Part Designs: Hot runner molds are best suited for applications where the part design is intricate, and the control of the molding process is critical to ensure the quality of the parts.

Production at a High Volume: The family has the benefits of cost and productivity, especially in large production processes.

The risks of moulds can be overshadowed by the benefits of moulds. They facilitate the possibility of cutting costs per unit of the part and increasing the speed of production.

Some of the factors that need to be considered when comparing the family molds and the dedicated molds are as follows;

Family molds are considered to be the most economical when evaluating the cost of molds. They also lower the total cost when compared to the dedicated molds, which are used for a single part, and a new mold is needed for the next product cycle. This makes family molds a better option as compared to other forms of undertaking when the undertaking is a bit financially challenged.

However, the maintenance of part quality may be more complicated with family molds because of different mold diameters. Mold filling is a problem in relation to balance and control, especially if the part has large differences in the wall thickness or volume. These differences may lead to dimensional and cosmetic problems. Nevertheless, the use of dedicated molds offers better control of the part infill, which in turn offers better cosmetics and dimensions of the part.

The cost of the parts produced by the two varieties of molds also differs. At the same time, the production rates are also dissimilar. The use of family molds enables the production of parts in quantities which in turn distributes the molding cost among the components and makes the cost of the part cheaper than when using single cavity molds. From the productivity point of view, it makes them almost on par with a two-cavity dedicated mold. The use of special molds is more economical, especially the molds with multiple cavities, since they have higher cavitation rates.

Another aspect in which family molds are limited is mold design flexibility. They provide fewer gating options because the components have to be located in relation to one another, thus limiting the design. On the other hand, low complexity of molds means that gating system is less versatile, however, it allows for creating highly detailed molds for each part.

The size of a run is appropriate for both the familial and the dedicated molds, although the two differ. For low to medium-volume production of fewer than 50,000 parts, family molds are notably considered best because of multi-cavities and help OEM manufacturers to bring parts to market in short time leads. Another type of mold that is highly advantageous is the dedicated mold since it can handle all run sizes, big or small.

The last of the factors that help in the determination of the suitable mold type is the part geometry. Family molds are suitable for the manufacturing of parts that are of similar size, shape, and even the structure of the features on the part. However, the complex part of the core draws or cams may be somewhat problematic because they may interfere with each other. Permanent molds are different from sand casting in that they are not restricted and can be used to produce parts of any geometry as long as they meet the design requirements for the use of plastics.

Therefore, family molds and dedicated molds are different and have their strengths and weaknesses, and certain problems that must be considered. The choice between them depends on factors such as cost, quality of the part, production volumes, design freedom, run quantity, and geometry of the part. These factors offer manufacturing companies the relevant information needed in decision-making processes concerning the production lines, thus increasing efficiency and decreasing costs.

china family mould injection molding

Composite Products Based on the Familial Models

Family mold injection molding is always a benefit to making toys, diversions and other composite products in one operation because the individual production of the components is extremely difficult. It is possible to identify several approaches to the storage and management of the different parts of the toy. Sometimes, the above parts are joined to a runner system on a two-plate mold occasionally. These can be bundled with the runner and transported in the same packaging as other vehicle parts.

It is a very straightforward way of making small quantities of the product using cheap molds, as the production quantities are often small. Hence, the cost of the product is cut down. But it is also important to note that the cost of the plastic dividers should also be incorporated in the packaging price.

Sometimes, it is possible to find an item that is produced in different colors; however, this is not a very frequent occurrence. For instance, an automobile may have a blue surface but a yellow interior even though it has many colors. The cars can be built from the same amount of blue, red and yellow, each of which has its own combination. In this case, the runners are taken off, and the vehicle is supplied with only a coat of paint. Further, this approach is sometimes used for technical products.

Family molds for small or medium-sized technical products.

It is also possible to use a family mold for a single or several pieces of a small or medium-sized technical product if it is complex, such as a washer. When a number of small similar items are produced in a single mold. There is also the probability of using these molds to manufacture large products that require a set of molds. However, these products are also used in the production of domestic appliances and other goods. Whether it is a 2-plate or 3-plate mold, or hot runner or cool runner, is irrelevant at this point. The variety of mold has the following two primary drawbacks:

The mold is filled with a variety of products in different sizes and shapes, excluding edge-gated 2-plate molds. They must be segregated before storage and use to avoid contamination and mixture of the two products. The management of inventory and production can cause serious problems if some of the products are used up faster than others, for example.

family tool injection molding

Types of Family Molds

Some of the most frequently recognized family molds include:

The most common type of plastic injection molding is family molds. The primary categories are as follows:

Single Cavity Molds

The mold has one opening or one channel through which the molten metal is poured in.

The simplest type of injection molds is the single cavity mold since it has a single cavity that is used to produce a single part at a time. Due to the simplicity of installation and use, this mold is suitable for home use and small enterprises.

Multiple Cavities Molds

The multi-cavity mold is more developed and it has many cavities that allow the production of many identical parts at once. This mold is widely used in large corporations to produce thousands of products of high quality within a short span of time.

This can, at times, be disadvantageous since it requires the manufacture of spare parts whenever specific products are on order. After that, a mold that is not a complete set will be needed to process a part of the items, and others are small sample pieces.

The process can be optimized by blocking off the runner system and using the injection mould only for the necessary parts, which means that there will be fewer unnecessary cavities. But this requires more mold cycles to be run.

Conclusion

In the context of the injection molding industry, family molds can be considered the company’s major asset in terms of cost reduction and increased production. They are most beneficial in the production of assemblies that contain many of the same parts. However, they also have their drawbacks; for instance, there may be problems with the stability of the structure and its maintenance.

Hence, there is a need to assess and critically look at the circumstances so as to arrive at the conclusion of whether a family mold is suitable for a given task. As such, manufacturers are able to make the right decisions, improve the process of production, and obtain the necessary results due to the knowledge of the features of family molds.

Sincere Tech is a well-established china family mold injection molding company. We have helped many clients to cut down their total budget costs by using fewer tools and applying our knowledge of family molds. The quoting tool can be used to get a quote and a clear picture of the cost estimate for your project.

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Insert Injection Molding

insert molding

Today, manufacturers are at the forefront of innovation, and they use plastic to make it compatible with metals or other materials to produce a wide range of products. Among the main technologies that are driving this progress is insert injection molding, a common technique in plastic injection molding.

This way, manufacturers can combine engineering plastics with inserts made of different materials, which results in products that are wear-resistant, lightweight, and have high tensile strength. The article focuses on comprehensive details on insert injection molding and discusses its pros and cons. Furthermore, we will be looking into the applications of insert injection molding parts and giving you valuable tips and insights on how to achieve success in insert injection molding.

Insert Injection Molding: An Overview

Insert injection molding, also known as insert molding, is a specific type of plastic injection molding process that involves the incorporation or combination of metal inserts with an injection-molded part. The process is about inserting the mold into the cavity and then injecting molten plastic under high pressure around it. Afterwards, as the plastic and inserts cool together in the mold cavity, they combine to form a robust and cohesive part.

By adding metal components, this method produces plastic products that are strong, durable, and lightweight. Many industries widely use metal insert molding, a multi-functional and efficient technique, due to its compatibility and effectiveness in producing high-quality parts.

insert injection molding

The Workflow of Insert Injection Molding

Insert molding injection is a conventional molding process for fabricating various end-use products, which involves melting and injecting molten plastic into a mold or die cavity under controlled conditions. Adding injection mold threaded inserts to the mold sets it apart from other traditional injection molding techniques. The below-mentioned steps are involved in the insert injection molding process.

Step 1: Insert loading into mold

The design engineers meticulously design molds for insert injection molding, ensuring that the injection mold inserts are precisely positioned within the mold cavity. Correct mold orientation and placement are of the utmost importance during the molding phase. This technique ensures the inserts remain firmly in place, maintaining their desired orientation and position in the molded part.

There are two primary methods of inserting components into a mold:

  1. Automated Insertion:

Automated insertion involves the use of robotics and automated systems to insert components into a mold. This method has advantages such as consistent insert placement, increased efficiency, and high precision. Automated machines can deal with high-temperature environments, which ensures a quick production turnaround with the ability to produce more parts per hour. However, the initial investment required for automated systems is higher, leading to a higher production cost.

  1. Manual Insertion:

Manual insertion is the process of putting components into a mold with the hands. This method is suitable for low-volume production situations. It is more suitable for jobs that require detailed part inspection and for operations that are not costly, like packaging and assembly. Nevertheless, manual insertion does not have the precision and repeatability of automated systems. The operators can also have dexterity issues due to the high temperatures involved, which may require the use of gloves.

Step 2: Push the molten plastic into the mold.

The injection unit injects an engineered-grade plastic resin into a die cavity during the second step of the insert injection molding process. High pressure drives the injection, pushing the plastic to fill every part of the mold. This pressure leads to the ventilation of air through the molds, which in turn certifies that the plastic sticks to the inserts completely. Maintaining the optimal injection temperature, pressure, and temperature within acceptable ranges is of paramount importance for uniform filling and defect-free end-use molded parts.

Step 3: Take off the mold and get the molded part.

The mold then cools down and opens up. An ejector system meticulously removes the final molded part from the mold after cooling and solidifying the molten plastic. Holding pressure during cooling will help prevent the shrinking effects and make sure that there is no backflow into the injection barrel. We carefully monitor the cooling time and temperature to ensure uniform solidification of the molded part, preventing warping or distortion. We then repeat these cycles to ensure continuous production.

Step 4: Remove the molded part from the runner.

Sprues and runners, the channels where the liquid plastic flows in and out of the mold cavity, link the multiple cavities of molded parts. Before implementation, we must separate the molded part from the sprue or runner. We manually perform this separation, primarily using simple tools like scissors or knives. We should closely monitor the molding step to prevent any damage or loss of the part.

If the mold utilizes the sub-gate design, we don’t need to perform this step. This design automatically divides the runner and the molded parts when the mold opens. However, not all parts can utilize the sub-gate design.

Step 5: Postprocessing Treatments

The molding and ejection of the part from the sprue may be followed by other post-processing operations to complete the insert-molded part before final use.

Some common post-processing treatments include:

Deburrs: Deburring involves the removal of excess material or burrs that may affect the appearance or performance of the molded part. Generally, people perform deburring by hand, using tools to eliminate burrs. Generally high quality mold will not have any burrs, if your mold have some burrs then you may need to fix the mold,

Heat Treatment: The molded part may undergo processes such as annealing or stress-relieving to eliminate internal stresses. Furthermore, heat treatment can enhance the strength and dimensional accuracy of the parts.

Surface Finish: There are several ways to carry out the final stage, such as printing, painting, or electroplating. The finishing processes are not only able to make parts beautiful and durable but even give them some special features, such as corrosion resistance.

Humidity control: This is the process of managing the moisture in the environment, which in turn affects the shrinkage of objects, the prevention of oxidation, and the rate of water absorption. Objects typically undergo this process by immersing in hot water baths or exposing them to steam chambers, which create a humid environment.

Pre-Insert Molding Considerations

There are many things to consider before the insert molding so that the production process proceeds smoothly and without any hitch. Just to refresh your memory, these are the areas you should concentrate on:

  1. Types of Inserts:

Inserts that are used in the insert molding process are one of the most important factors that can lead to the success of the process. Determine the inserts that can endure the temperature and pressure swings, which are usually an inherent part of molding.

  1. Insert Location:

The positioning of inserts in the molds is one of the most important things to be considered when it comes to the durability and maintenance of the molds in the future. Imagine the forces acting on the insert and make sure there’s enough plastic under and around it to keep it in place.

  1. Gap Width for Metal Inserts:

It is important to maintain the gap between the metal inserts and the liquid material at a safe distance to avoid its negative impact on the final products. Closing the gap between the mold and the part ensures that the part bonds together to form a reliable finished molded component.

  1. Resin Selection and Molding Conditions:

The selection of the right resin type and molding conditions is crucial, since through this we can mold complex parts (electronic components, glass). The resin must be strong enough to seal the inserts well and fix them properly.

  1. Mold Design:

The mold not only shapes the material but also keeps the inserts immobile during the molding process. Use manufactured inserts in your molds to maintain their firmness throughout the production stage.

  1. Cost Considerations:

The total price should cover the insert costs, the operator’s expenses (for manual insertion), and the price rise that may occur because of the inclusion of inserts. Add a cost-benefit analysis to your decision-making process and make it fact-based.

  1. Production Volume:

Pick between a manual or automatic loading option based on the production volume. Analyze the production requirements and evaluate the merits and demerits of all loading methods to achieve the highest possible levels of efficiency and cost-effectiveness.

Brass insert moulding

injection molding threaded inserts

Considerations During Insert Injection Molding

Precision in the insert injection molding process is the key point that ensures the highest quality performance. These are the essential points you should keep in mind.

  1. Mold Design:

The design of the mold plays a crucial role in safeguarding the insert from damage, often caused by high temperatures and pressure. The degree of security and stability the mold requires for successful completion will be the critical factor that determines its design.

  1. Secure Insert Placement:

Insert placement and stability are critical points that significantly contribute to the successful operation of inserts in the molding process. The smallest shake or move will give us a flawed final product. Find out different ways to achieve the perfect hold of inserts during molding.

  1. Undercut Features:

The injection molding inserts not only add aesthetic value to the parts but also improve their structural integrity and strength. It binds, which enables the components to remain cohesive.

  1. Partner Selection:

It would be wise to choose a reliable and experienced partner for insert molding. Working together with corporations gives you the opportunity to leverage the latest innovations and skills in component assembly, enabling you to produce integrated parts of superior quality.

Benefits & Limitations of Insert Injection Molding

Injection molding inserts are a popular choice in manufacturing processes due to their numerous advantages.

Cost-Efficiency: By eliminating the post-molding assembly, insert injection molding reduce assembly and labor costs, resulting in overall cost savings.

Weight Reduction: Inserts are a way to reduce the mass and volume of molded products so they are more portable and easier to handle.

Design Flexibility: Inserts are a design device that designers use to make their products stand out from the crowd by making them more complex and unique.

Enhanced Parts’ Strength: The integration of metal inserts into the molding process gives the molded parts mechanical properties that are stronger than the regular ones, thereby increasing their durability and performance.

Despite these advantages, injection molding inserts also come with certain drawbacks.

Complexity and Cost: The design of insert molds is much more intricate and costly compared to the regular molding processes, which require one to consider additional factors and allocate resources.

Material Compatibility: Due to differences in thermal expansion, some insert materials may not be suitable for molding, causing production issues.

Positioning Accuracy: Errors may be encountered in the molded parts if the injection molding inserts are not properly aligned in the mold, which may result in defects in the end product.

Increased Cycle Time: Inserts require careful positioning within the mold before the molding process begins, which could impact production efficiency.

Insert Injection Molding and Overmolding are compared

Insert injection molding and overmolding are the two distinct injection molding processes that produce molded parts with unique features. Despite sharing similar goals, they differ significantly in their methods of achieving these goals and in the final product they produce.

Overmolding

Overmolding

The insert injection molding process is a unique method that shapes the plastic material around the pre-formed insert in the mold. The plastic material adheres tightly to the insert, forming a single integral part, to achieve this. Insert molding is a one-shot injection molding technique that has the advantages of speed and cost-effectiveness, as well as the economical use of materials.

Primarily, overmolding is a two-shot molding process, which means molding a rubber-like plastic over a plastic substrate. The complexity and cost of this dual injection molding process are higher compared to the single injection molding process, primarily due to the additional layer of material and the additional mold cost.

The main objective of the insert injection molding process is to strengthen the molded parts by adding inserts in the initial design phase. The former adds comfort, beauty, and protective layers to a product, enhancing its functionality and appearance, setting it apart from the latter.

Therefore, the primary goal of insert molding is to improve strength and material efficiency, whereas overmolding focuses more on functional versatility and aesthetics, making each technique suitable for specific applications and design requirements.

In summary, insert injection molding requires only one mold cost (the overmold), whereas the overmolding process requires two mold investments: the substrate mold, which is the first mold, and the overmold, which is the second mold.

Insert injection molding applications in many different industries.

Molding nowadays is a widely demanded manufacturing process due to its diversity and efficiency. Let’s discuss the primary industries that utilize insert injection molding, along with the specific applications within each industry.

Aerospace Industry:

In the aerospace industry, the most popular technique for producing critical parts like aircraft seats, stowage bin latches, lavatories, handles, and user interface switches is injection molding. These aspects should be a mixture of strong, durable, and lightweight designs. All of these attributes can be addressed through injection molding. With the insert molding, the space industry gets lightweight aircraft, high-strength components, shorter manufacturing and assembly times, and design improvement.

Automotive Sector:

In the auto industry, the process of insert injection molding replaces metal parts with more durable plastic ones.

This transformation results in the manufacture of lightweight auto parts, which in turn improves fuel economy and reduces assembly costs. The automotive industry commonly uses insert molding as a manufacturing process to produce interior panels, knobs, handles, electronic connectors, and structural parts. Furthermore, the insert molding technique provides both flexibility and reliability, which allows automotive manufacturers to innovate and come up with new designs and functionalities.

Medical Device Manufacturing:

The medical device manufacturing industry widely uses molding inserts, which demand the highest levels of precision, biocompatibility, and reliability. Insert injection molding techniques enable the production of a wide range of medical devices, from simple tools to sophisticated implants and surgical instruments. Examples of these applications include tubes, components of medical equipment, dental instruments, prosthetics, surgical blades, and enclosures for medical devices. The insert molding process guarantees the smooth transition of different materials and meets the high quality and safety standards of the medical industry.

Consumer Electronics Industry:

In the consumer electronics industry, the insert injection molding technique has revolutionized assembly processes by eliminating the need for fasteners and soldering. The insert molding industry encompasses a wide range of applications, including encapsulating threaded inserts, wire plugs, and producing digital control panels, assemblies, and knobs for appliances. Besides, insert molding has a wide range of applications in military equipment, threaded fasteners, and various electronic components used in consumer electronics.

Defense Sector:

In the defense industry, insert injection molding is a key enabling technology for the manufacture of military-grade equipment that is cost-effective, efficient, and lightweight. Handheld communication devices, weaponry components, battery packs, munitions, and housing for optical instruments like binoculars and monoculars all use this technology. Injection molding insert has the advantage of creating parts with robust and reliable structures, which have intricate designs and functionalities and meet the high standards required for defense applications.

These industries utilize insert injection moulding as the preferred manufacturing method for a wide range of applications due to its ability to unite different materials, increase product durability, reduce manufacturing costs, and improve overall product performance.

FAQ’s

Q1. What is the purpose of inserts in injection molding?

Inserts are the key elements of the molded plastic products that increase their strength and durability; moreover, they are made of metal.

Q2. Can large parts be manufactured using insert injection molding?

Insert molding is the best choice for the production of small and medium-sized parts. Dealing with bigger parts presents challenges such as higher tooling costs and complexity in insert placement.

Q3. Which inserts are commonly used in insert injection molding?

Manufacturers typically use the inserts to enhance the strength and performance of molded parts. Manufacturers construct these inserts from metal components like studs and screws, electronic components like connectors, terminals, switches, and buttons, and plastic parts.

Summing Up:

Insert injection molding, a manufacturing process that blends plastic with non-plastic materials, has gained popularity in industries such as aerospace, defense, automotive, and medical equipment due to its numerous benefits. These include cost-saving, improved part reliability, and better design flexibility.

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