Blog about plastic injection molding, if you are looking for plastic injection molding service, you are welcome to contact us, we will offer you price for your reference
Cold Runner Mold: Plastic Injection Molding, Simple Part Design, Limited Production Runs, Low Maintenance, Change Production Color, Low-Cost Mold
What is cold runner mold
A cold runner mold is a type of injection molding tool where the plastic material is cooled in a separate channel or “runner” before it reaches the individual cavities of the mold. The plastic resin is injected into the cold runner system, where it solidifies before being directed into the cavities to form the final parts. The term “cold” refers to the fact that the runner system is not heated, unlike a “hot runner” mold. Cold runner molds are often used for producing large numbers of small, simple parts and are relatively low-cost to produce.
SINCERE TECH (plasticmold.net) provides plastic injection mold solutions to industries of all types and sizes.
Our state-of-the-art mold buildingfacilities include high-speed CNC Milling and mirror EDM Machining for many types of complex specialty injection molds, including insert molds, gas-assist injection molding, 2K mold, multiple cavities mold and unscrewing molds. We can build molds from small to big (25 ton) for both hot runner mold systems and cold runner mold systems.
Cold Runner Molds: Efficient and Economical
Here are some key characteristics and considerations of cold runner molds:
Runner System: In a cold runner mold, the plastic material is injected into a runner system that distributes the molten plastic to multiple mold cavities. The runner system is typically designed to be easily removed from the finished part, but it generates waste material (the runners) that needs to be recycled or disposed of.
Simplicity: Cold runner molds are simpler and less expensive than hot runner molds because they do not require the complex heating and control systems associated with hot runners.
Material Waste: The main drawback of cold runner molds is the generation of material waste. The runners are typically discarded or recycled, which can add to material costs.
Cycle Time: Cold runner molds may have slightly longer cycle times compared to hot runner molds because the plastic in the runners must cool and solidify before the parts can be ejected.
Part Quality: The simplicity of cold runner molds can make them a good choice for parts with relatively simple geometries. However, in some cases, cold runners can cause aesthetic defects like visible weld lines on the finished parts.
Heat-sensitive Materials: Cold runner molds are suitable for a wide range of plastics but may be less suitable for heat-sensitive materials that can degrade during the cooling process.
Maintenance: Maintenance and cleaning of cold runner systems are generally easier compared to hot runners because there are no heated components to deal with.
Ultimately, the choice between cold runner and hot runner molds depends on the specific requirements of the molding project, such as part complexity, material selection, production volume, and cost considerations. Cold runner molds are commonly used in many applications, particularly when cost and simplicity are important factors.
Choosing the correct system depends on the requirements of the part to be produced. A few of the considerations include:
Part complexity
Color requirements
Physical characteristics of the material
Type of material – virgin or “regrind”
Color changes during the production run
Cold runner systems are best used:
When the parts produced are of simple design,
For limited production runs, or
When a rapid change in production colour is needed
In a cold runner mold, the runner (excess material retained in the feed channels) is cooled and ejected with the part. Every cycle, apart, and a runner is produced.
Three plate cold runner mold
two plate cold runner mold
There are two major types of cold runner molds:
A two-plate cold runner mold is the easiest and least expensive type of mold to produce. Two plate molds have a single parting plane, and the mold splits into two halves at the plane. Because the runner system must be in line with the parting plane, the part can only be gated on its perimeter.
A three-plate cold runner mold differs from a two plate in that it has two parting planes, and the mold splits into three sections every time the part is ejected. This feature provides greater flexibility of design, allowing gating to be placed in the most efficient locations. Since the mold has two parting planes, the runner system can be located on one, and the part on the other, for easier separation.
Cold Runner Mold Systems: The advantages & disadvantages
There are many significant advantages to using a cold runner mold system:
Simple, lower-cost mold design and construction
Considerably less expensive than a hot runner system
Moulds require less maintenance
Easier to set up and operate
Colour changes are easy – all plastic in the mould is ejected with each cycle
While it is a less expensive process that hot runner systems, there are a few disadvantages to cold runner systems that need to be considered, including:
Waste plastic generated
Runner material must be either disposed of or
reground and reprocessed
Additional steps in the manufacturing process
Regrind will increase variations in the injection molding process
Regrinding could decrease the plastic’s strength characteristics and mechanical properties
At Sincere Tech China mold maker, our unwavering commitment to staying at the forefront of the plastic mold industry drives us to embrace advancements and anticipate future trends. We continuously explore innovative materials and composites that offer enhanced performance and promote sustainability. By investing in ongoing research and development, we consistently deliver cutting-edge solutions that meet the evolving needs of our valued customers. As a trusted injection mold supplier in China, we take pride in our unwavering dedication to excellence.
Aligned with our sustainability goals, we place a high priority on environmentally friendly practices. We actively seek out sustainable alternatives, such as biodegradable polymers, and implement recycling initiatives to minimize the environmental impact of our manufacturing processes. By choosing our custom injection molding services, you can align your brand with sustainable manufacturing practices and contribute to a greener future.
Ensuring quality is our topmost priority, and we maintain rigorous quality control measures throughout the entire manufacturing process. Equipped with state-of-the-art facilities and staffed by skilled technicians, we subject each product to thorough inspection and testing. This guarantees exceptional performance, reliability, and customer satisfaction.
When you choose Sincere Tech as your preferred plastic mold maker in China, you can expect the highest level of professionalism, expertise, and innovation. Our dedicated team is committed to helping you bring your ideas to life, delivering superior products that excel in performance, durability, and cost-effectiveness.
Partner with Sincere Tech today and experience our relentless pursuit of excellence, as we work together to bring your vision to reality.
Our expanded capabilities include:
Rapid Prototyping: We offer rapid prototyping services to quickly transform your concepts into tangible prototypes, allowing for iterative design improvements and accelerated product development.
Precision Tooling: Our advanced tooling capabilities enable us to create high-quality molds with tight tolerances, ensuring consistency and precision in your injection-molded products.
Overmolding: We specialize in overmolding, which allows for the combination of multiple materials or components, resulting in enhanced functionality, aesthetics, and durability.
Insert Molding: Our expertise in insert molding enables us to securely encapsulate inserts within the molded parts, facilitating efficient assembly and enhancing product performance.
Two-Shot Molding: With two-shot molding, we can produce complex, multi-material components in a single operation, reducing assembly requirements and enhancing design possibilities.
Value-Added Services: In addition to injection molding, we offer a range of value-added services, including product assembly, packaging, and logistics support, streamlining your supply chain and reducing costs.
Partner with Sincere Tech Mould suppliers for your custom injection molding needs, and benefit from our comprehensive capabilities, unwavering commitment to quality and sustainability, and our drive to exceed your expectations at every step of the process. Together, let’s bring your innovative ideas to life.
Plastic injection molding is a widely used manufacturing process. In today’s world, this method has become essential for producing large-scale plastic parts. Its popularity is due to its fast, accurate, and highly efficient operation.
Plastic injection molding typically allows you to create countless plastic items. Most of these plastic parts are your daily items, from your smartphone casting to the handle on your toothbrush.
Plastic injection molding allows you to make thousands, even millions, of identical parts. Of course, these plastic parts come with tight tolerances up to 0.01mm. This level of precision creates accurate designs and products that make the product effective and look good. Injection-molded products are widely used in the car, consumer goods, and electronics industries.
Plastic injection molding involves several key stages. Each stage here is critical. In this article, we’ll dive into these stages so you can see how products go from raw plastic to ready-to-use parts. Moreover, you’ll learn about the plastic injection molding services offered in a factory. This article will be a comprehensive guide, so let’s get started.
What Is Plastic Injection Molding?
Injection molding is a prevalent manufacturing method. The term is divided into “injection” and “molding.” As the name indicates, this process entails injecting material into a mold. Plastic injection molding refers to the use of plastic.
This method shapes parts of various designs by injecting the molten material into the plastic injection mold. It is widely used to make plastic parts quickly and accurately. Once the mold is ready, you can create hundreds or millions of plastic parts. The process is highly efficient and offers consistent quality. As a result, people prefer this method to create complex shapes and precise details.
This procedure is not limited to plastic toy pieces or containers. Plastic injection molding is critical to numerous industries. Take the auto industry, for example. Almost every vehicle on the road today features injection-molded components, such as dashboards.
Electronics such as laptops, smartphones, and more depend significantly on this process. Most of their internal components, casings, and joints are injection molded.
In the medical industry, accuracy is essential, and injection molding delivers just that. The process yields precise tolerances for surgical tools, syringes, and other medical items.
Then there’s the consumer goods industry. Injection molding mostly makes our everyday items. Typical examples are kitchen utensils, plastic jars, bottles, furniture, food containers, and more.
Benefits of Plastic Injection Molding Compared to Other Methods
There are various types of plastic-forming methods. Some popular ones are extrusion molding, compression molding, blow molding, and rotational molding. Now, what are the benefits you can get from the plastic injection molding method?
Precision and Complexity
One of the best things about plastic injection molding is precision and complexity. Extrusion molding or compression molding typically deals with simpler shapes. Therefore, these methods are not suitable for complex shapes.
Plastic injection molding, on the other hand, can handle more complex geometries with related mold structure. This method also allows you to work with thin walls, tight tolerances, and small and fine details. You can get the highest quality plastic products compared to any other methods.
High Production Speed
Time is valuable, especially in manufacturing. Plastic injection molding is built for speed. Once the injection mold is set up, it can produce parts rapidly, much faster than traditional or blow molding. This speed makes plastic injection molding process a go-to option for high-volume production. It’s one of the fastest methods out there.
You will be surprised to learn that plastic injection molding can make thousands of plastic parts in an hour. This method can save time and money simultaneously.
Minimal Waste
Plastic injection molding is efficient in material use. If you can make the mold correctly and precisely inject the plastic, you can minimize excess plastic—extrusion molding, where continuous material flow often leads to scraps.
In plastic injection molding, the extra plastics can be used further, reducing injection molding costs and contributing to a green environment.
Consistent Quality
Plastic injection molding also ensures uniform products. One plastic injection mold can produce millions of plastic products with the same shape and properties. It’s tough to achieve exact uniformity with compression and blow molding, but you can do it precisely with injection molding. It reduces the cost and meets the demand for high-quality products.
Versatile Material Choice
There are many types of plastics out there that are widely used in many applications. They are not all the same, and each type has its unique application. Injection molding can easily accommodate a wide range of materials. This flexibility allows you to meet a specific need. This means you can meet exact strength, durability, and flexibility properties.
Superior Finish
Injection molding creates parts with smooth surfaces and a clean finish. This method eliminates or reduces the need for post-processing. Rotational molding, on the other hand, is pretty tricky and requires extra finishing.
What is an Injection Molding Machine?
A plastic injection molding machine is a simple piece of equipment. It has several vital components that work together to produce plastic parts. In general, there are three central units in a plastic injection molding machine. Each element plays a crucial role in the plastic injection molding process.
Clamping Unit
The clamping unit holds the mold tightly in place during the injection process. It acts as a grip so the mold doesn’t slip, allowing you to change it based on the final product design.
When the machine begins, the clamping unit closes the mold halves. It uses high pressure, primarily hydraulic pressure, to prevent plastic from leaking during injection.
After the part cools, the clamping unit opens the mold to release the finished product. Without this unit, the process would be a mess.
Injection Unit
The injection unit, on the other hand, is the heart of the machine. It melts the plastic granules and injects them into the mold. The injection unit has a hopper that feeds the plastic into a heated barrel. The material is melted inside the barrel until it reaches a liquid state. Then, a screw or plunger pushes the molten plastic into the mold.
Control Unit
Note that this whole process must be appropriately controlled. Otherwise, the final product might get messy. For example, temperature control is critical in this process. You must set the temperature at the right level so that your final product doesn’t have defects. On the other hand, injection time, ejection time, and pushing force should also be adequately controlled.
What is Injection Mold?
As mentioned in the previous section, the clamping unit typically holds the injection mold. The injection mold is part of the clamping unit and shapes molten plastic into specific forms.
Injection molds are commonly made of tool steel. A variety of tool steels can be used to make injection molds. P-20 28-30 RC, S-7 pre-hardened tool steel 56 RC, H-13, and 420 are noteworthy. These tool steels are strong and durable, and the material must be strong enough to withstand millions of plastic products.
An injection mold comprises two essential parts: the cavity and the core. The cavity is the hollow space that the plastic occupies. It determines the outward form of the component. The core, on the other hand, determines the interior details. Together, they create a complete part.
You can realize the importance of a high-quality mold in making plastic injection-molded parts. The quality of the injection mold also determines the quality of the final parts. Therefore, you must first ensure the quality of the injection mold.
A well-designed mold leads to fewer defects and reduces production time and costs. Poor design may result in warping and inconsistent quality. So, seeking professional help when designing your first injection mold is wise.
How Does Injection Molding Work?
You have already gone through a comprehensive study of injection molding. You are also familiar with the various components of an injection molding machine. In this section, you will learn how injection molding works.
Clamping
The first step in the injection molding process is clamping. Here, the two halves of the mold are brought together. This is the crucial stage. If the mold isn’t clamped tightly, molten plastic can escape, which may create defects in your final parts.
The clamping unit holds the mold halves together with significant force. The force or pressure must be strong enough to withstand the pressure of the injected material. If it’s too weak, the mold will open during injection, causing a mess. Too much force can damage the mold.
So, how do you determine the correct clamping force? Consider aspects such as the part’s size and the plastic utilized. For example, bigger pieces need more force. The goal is to get a tight fit without overdoing it. Once the mold is firmly closed, we proceed to the next step.
Injection
The plastic material is fed into the injection molding machine at this stage. The raw plastic, usually in pellet form, is heated until it melts into a thick, gooey substance.
It is pouring syrup into a mold. The molten plastic is poured into the mold cavity under high pressure, ensuring that it fills every nook and corner. If the pressure is too low, the mold cannot fill. It is important to note that improper pressure might result in weak or incomplete portions.
Speed is also critical during injection. The faster the material is injected, the less time it has to cool before filling the mold. But there’s a problem. Doing it quickly can create turbulence, the main cause of a few defects. Therefore, you must carefully balance speed and pressure.
Dwelling
The dwelling phase is also critical in the plastic injection molding method. As you know, you must maintain appropriate pressure while filling the mold. When the plastic is injected, it doesn’t always fill the mold evenly. There might be air pockets or gaps. To avoid this issue, you must hold the pressure steady. This way, you can ensure no trapped air inside. This is where the dwelling phase comes in.
The dwelling time can vary depending on the material and part design. Too short a dwelling time can lead to incomplete parts, while too long can waste time and energy.
Cooling
Once the dwelling phase is complete, it’s time for cooling. This is where the real transformation happens. The molten plastic begins to solidify as it cools. The cooling stage must be maintained properly to set the shape of the part.
This stage usually takes longer than the dwelling stage. In this case, the mold’s temperature generally plays the leading role. You could use an air or water cooling system. Warping might happen if the mold is too cold, so be careful!
Mold Opening and Removal of Products
After cooling, it’s time to release the final part. Usually, the ejector pin does this. The clamping unit releases the pressure, generally allowing the two halves to separate. If you do it incorrectly, it can damage the mold or the finished part.
Once the mold is open, you can remove it using tools or hand. Once removed, the part is inspected again. It might undergo further processing, such as trimming or surface finishing.
Plastic Injection Molding Materials
One of the best benefits of plastic injection molding is its versatility. You can generally work with various plastic injection molding materials in injection molding manufacturing. Selecting the suitable material from this diverse list depends on your project needs. Remember, each material here has its unique strengths and weaknesses. Do you need flexibility? Go for PE or PP. Want Toughness? Try ABS or PC.
Polyethylene (PE)
This plastic is incredibly lightweight and flexible. It is also very resistant to chemicals and moisture, making it a popular choice for containers and bottles.
Polyethylene is one of the most widely used plastics globally due to its incredibly lightweight, flexible and cost-effectiveness. It is also very resistant to chemicals and moisture, making it a popular choice for containers and bottles.
There are various type of PE materials, including Low-Density Polyethylene (LDPE), High-Density Polyethylene (HDPE), and Ultra-High Molecular Weight Polyethylene (UHMWPE), each one uses to different applications but very similar.
Properties: Lightweight, flexible, moisture-resistant, and resistant to many chemicals. PE is relatively soft but has good impact resistance. It can handle low temperatures but has limited resistance to high temperatures.
Types of PE materials:
LDPE: Known for its flexibility, commonly used in film applications like plastic bags.
HDPE: Stronger and more rigid, used in items like milk jugs, detergent bottles, and pipes.
UHMWPE: Extremely tough with excellent wear resistance, often used in industrial applications, such as conveyor belts and bulletproof vests.
Applications: Due to its variety, PE is used across industries for containers, piping, and even high-wear applications. In the food industry, it’s ideal for food containers, food packaging due to its moisture resistance. Go to PE injection modling and HDPE injection molding page to know more about this PE material.
Polypropylene (PP)
Polypropylene is another popular choice. It is prevalent for being strong and very resistant to fatigue, it provides excellent temperature resistance.It’s available in homopolymer and copolymer forms, with each variation suitable for specific applications.
Properties: Strong, durable, fatigue-resistant, and excellent temperature resistance. PP can endure repetitive bending, making it suitable for applications like living hinges.
Advantages: PP offers high chemical resistance and is lightweight, yet stronger than PE. It’s also resistant to absorbing moisture, making it ideal for long-lasting products.
Applications:
Automotive: Frequently used in automotive parts like bumpers, dashboards, and battery cases.
Consumer Goods: Found in reusable containers, furniture, textiles, and packaging. Its fatigue resistance makes it useful for hinges in household products and storage containers.
Medical: Sterilizable and resistant to bacteria, PP plastic material is also common in medical syringes and vials. Go to polypropylene injection molding page to know more.
Acrylonitrile Butadiene Styrene (ABS)
ABS is a plastic used for injection molding. It is known for its toughness, making it great for parts that need to endure impact. It has a glossy finish, so it’s often used in electronics and toys. ABS might be your best bet if you want something that looks good and lasts.
Properties: ABS is tough, impact-resistant, and lightweight with a glossy finish. It’s also relatively affordable, combining strength and visual appeal.
Advantages: Known for excellent impact resistance, making it ideal for products that must withstand rough handling. ABS is also highly machinable and easy to paint, providing aesthetic and functional versatility.
Applications of ABS plastic products:
Electronics: Used for casings, keyboards, and monitor housings due to its aesthetic finish and durability.
Automotive: Instrument panels, wheel covers, and mirror housings.
Toys and Consumer Products: Especially popular for toys (such as building blocks) that require durability and a pleasing appearance. Go to ABS injection molding and what is ABS material page to know more about this material.
Polycarbonate (PC)
This plastic material is relatively heavier than other plastics. This material could be your best choice when you need a durable solution. It is virtually unbreakable and highly transparent. This material is used in safety glasses and light fixtures. It’s a strong option when transparency and resilience are needed.
Properties: Polycarbonate is heavier than most plastics but is virtually unbreakable and highly transparent. It can withstand high impact and heat, making it suitable for safety applications.
Advantages: It’s one of the strongest transparent plastics available, with excellent heat resistance. It’s also easily molded, allowing for intricate designs in parts and components.
Applications:
Safety Equipment: Used for safety glasses, helmets, and shields due to its shatter-resistant quality.
Optical Media: Common in lenses and DVDs because of its clarity.
Construction and Lighting: Used in skylights, lighting fixtures, and bulletproof glass for durability and transparency. Go to polycarbonate injection molding and Polycarbonate vs Acrylic pages to know more about this PC plastic material.
Nylon (PA)
Nylon is a plastic material with excellent strength and flexibility. It is also very resistance to wear and abrasion. Available in different grades (Nylon 6, Nylon 6/6, etc.), each with specific properties, it is widely used in industrial applications requiring toughness. It can also handle high temperatures.
Properties: Excellent strength, flexibility, abrasion resistance, and wear resistance. Nylon can withstand high temperatures and provides good chemical resistance.
Advantages: Nylon’s high durability and heat resistance make it a top choice for mechanical parts, while its low friction makes it suitable for gears and bearings.
Applications:
Mechanical Components: Often used in gears, bearings, bushings, and other wear-prone parts due to its strength and durability.
Textiles: Common in fabrics due to its strength and resilience, often used in outdoor gear and apparel.
Automotive: Used in engine components, fuel tanks, and under-the-hood parts due to its heat resistance. Go to nylon injection molding page to know more.
Every single plastic provides specific advantages that make it ideal for particular applications. Selection depends on factors like strength requirements, environmental conditions, aesthetic preferences, and manufacturing costs. This guide helps in understanding which plastic might be best suited for various product requirements across different industries, from consumer goods to industrial components.
Plastic Injection Molding services
A typical plastic injection molding factory can offer you unique services. Each of these services might benefit you in your business. This section will familiarize you with a few plastic injection molding services.
Service #1 Design and Engineering Support
Designing and engineering support are crucial parts of mold and product design. A perfect injection mold can ensure effective injection and the highest quality of the products. Every mold manufacturing company specializes in this to meet specific customer demands. The engineering team collaborates with clients to optimize part designs.
This way, they can ensure good manufacturability and the efficiency of the whole process. They also evaluate the initial design and suggest changes to save time and reduce costs.
DFM is a term used to manufacture plastic injection molds. Design for manufacturability focuses on how easy or difficult a design is to manufacture. It helps identify potential issues early in the process. By implementing DFM principles, designers can reduce production hiccups. You will know this when you deal with the actual injection mold design process.
Service #2 Custom Mold Making
Custom mold making is another primary service of an injection molding company. To launch new plastic products, you must start by creating a custom plastic injection mold.
The mold-making process starts with the design and engineering steps. What shape do you need? How thick should the walls be? These questions guide the mold design steps.
Several other factors also play a crucial role here. First is the material choice. As mentioned already, injection molds are typically made of high-quality tool steels. When making the molds, tolerance is the most critical parameter. Therefore, the manufacturing method must be wisely chosen.
The two most popular injection mold-making methods are CNC machining and casting. CNC machining can be of various types. Based on your design, the CNC method varies. Sometimes, you may need multiple CNC machining methods. For instance, CNC milling creates grooves, holes, and inner shapes. Other CNC methods include CNC turning, boring, drilling, and more.
Metal casting is another method of making injection mold cavity or core, this is specially used in plastic doll toys related products. It is pretty complex and requires careful consideration to make any type of plastic injection molds. CNC machining and EDM (electric discharge machining) are two popular manufacturing process of creating plastic injection molds.
Service #3 Custom Plastic Parts
You might not have the facility to install custom molds. On the other hand, making such facilities might need high costs. Because of this, most injection molding manufacturers also offer to make various custom plastic parts. This way, you can save a lot of investment costs and make money faster, you only need to buy the injectino molds and send your molds to your plastic injection molding supplier, they will make all of custom palstic products base on your customized injection mold.
This process also starts with a clear design. Once the mold is ready, plastic is injected at high pressure into the mold. As the plastic cools and solidifies, the part takes shape. You already know the benefits and detailed manufacturing process.
Service #4 Quality Control and Testing
A plastic injection molding company offers testing and quality control services in addition to the above three services.
Quality control is crucial in injection molding. It’s the safety net that catches upcoming issues when they happen. Various quality control processes might be needed depending on the mold and its products.
Dimensional checks are one of the first lines of testing. This process measures parts against specified tolerances. Are they the right size? Do they fit together as they should? If not, the engineers make necessary adjustments before mass production. Strength testing is the next testing method. This testing method ensures that parts can withstand their intended use. Besides, there are other tests like surface finishing, pressure testing, spur testing, defects testing, and many more.
Frequently Asked Question
How Much Does Injection Molding Cost?
The cost of injection molding generally varies based on design and size—the average ranges from $1000 to $5000. If you need larger molds, the cost might be higher. The cost of injection-molded plastic parts, on the other hand, depends on the type of material. PC plastic is generally more expensive than PVC or ABS.
What Is The Problem With The Injection Molding Process?
Every process has its hiccups, and injection molding is no exception. Common problems include warping, which occurs when the part cools unevenly.
Flash is another problem with the injection molding process. It is the excess material that seeps out of the mold. Have you seen unwanted edges on your plastic parts? If yes, then it’s a sign of flash. In contrast, shorts happen when the mold doesn’t fill completely.
How Long Does It Take to Make A Plastic Mold?
The time it takes to create a plastic mold can range from a few weeks to several months. The specific time is not fixed. It all depends on the complexity and the specifics of your project.
How Do I Add Texture to The Mold?
Adding texture to a mold can improve your product’s look. It’s all about aesthetics and function. There are several methods to do it. One of the popular ways is etching, which creates patterns on the mold’s surface before it’s used. Another option is laser engraving.
Final Words
Plastic injection molding is one of the most popular plastic manufacturing processes. It is an efficient way to make complex, high-precision plastic parts. Throughout this article, we talked about this process, especially plastic injection molding.
We are among the top 10 plastic injection molding companies in China, specializing in plastic injection mold and injection molding manufacturing, and we export plastic parts from China to various contries of the world. Over 40 happy customers have provided us with the best quality, and they are fully satisfied by our quality and service. You are welcome if you need our support. We sincerely hope we could service you in the near future, and you will be surely happy as well as our other happy 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 injection molding companies in China. If you need injection molded parts for your business, you need to really think about this.
The above-described injection molding process uses an injection molding machine to manufacture plastic products. There are two main parts to the machines: the injection unit and the clamping unit. Please visit our injection molding section for further information.
Are you in need of injection molding, or are you seeking a China-based injection mold partner to create plastic molds and manufacture your plastic molded parts? Send us an email, and we will reply to you within two working days.
China has become a major destination for Plastic Injection Mold and molding parts service. Lower prices are the primary incentives for many foreign buyers. The majority of foreign buyers find challenges sourcing plastic injection molding from China. The major strains are on how to buy, how to evaluate quality, or how to identify a reliable source.
Many things go wrong in case of compromise in the purchase process. For example, delayed delivery, frauds, low quality, weakness of communication (both on language and technical), and other problems may be encountered. To avoid such frustrations, the following is a process of how a buyer would purchase plastic injection molding from China. Hope this could help you find your best suitable supplier
Identify a Reliable Plastic Molding Manufacturer
Currently, there are many mold manufacturing companies in China. You need to determine which supplier is reliable. Some of the factors to consider include, mold price, quality, quantity, accessory standard, communication, lead times, and the mold design, among other factors.
Using the World Wide Web, you can easily find a wide range of plastic molding suppliers from the internet, sourcing agents, and trade shows, etc.
It is important to contact several suppliers before making a decision on a suitable supplier.
Evaluate the Various Mold/Molding Manufacturers
Conducting market research on the various plastic molding manufacturers helps to find a suitable fit for the business. So how can one evaluate the Chinese mold makers to identify a reliable source?
Sending inquiries helps the evaluation process. You should focus on asking questions that evaluate the core competence of the plastic molding companies.
A good supplier is one that shows interest in your projects, has effective communication, knowledgeable, detail-minded, and honest. The evaluation should target to identify the salient attributes of the supplier, for example, what is advantages do they have, is it suitable for your project? Have they done any similar projects like yours? All of the information will help to make your project smoothly or not.
Information Verification
Not all manufacturers are who they say they are. The customer should be able to verify the plastic molding manufacturer. Some of the information that can be verified include:
Type of mold parting line
The type of ejection modes, whether pins are used and the particular locations,
Surface requirement on the visible surface
The location and type of gates
Such information helps to verify the mold designs and product appearance. the most important thing is basing on this discussing with each other you will know their communication and technology ability. A supplier that verifies the information and offers samples is reliable.
Analysis of Production Issues that may Arise
A good plastic molding supplier should communicate the issues in advance and concerns that may arise in the production process, and actions are taken to address the issue. A good injection mold company should analyze the current design and offer rational recommendations, we call this DFM report.
Some of the important questions that help identify some of the issues include;
Have you produced similar molds/products before?
What were the challenges encountered?
Can you send your quality control inspection report?
How do you address the issues that arise?
Do you offer compensation for compromises?
With all the information, you should already have identified which Chinese molding company to source from.
Firm/Supplier Site Visit
Depending on the quantity of supply sourced, visiting the supplier may be important. For large quantities of plastic molding service, traveling to China should be a basic step. The objective is to analyze samples and evaluate the reliability of the supplier.
Go to their plastic molding company on site to communicate with them face to face, then you will know how the technical skill, English ability, etc. But mostly not always have time to check their mold factory, so we suggest you may ask for a skype video shows if you have no time to visit them.
At SINCERE TECH will take Skype video meeting to show you around our plastic mold and molding factory if you have no time to visit our factory, our sales and project manager speak good English and have the professional technical skill, you will know this during the video shows. if you are interested in our service, you are welcome to contact us.
injection moulding company
Maker A Contract
Importing products from China and Asian nations can be risky and complicated. Contracts are antidotes against the common mistakes and issues that may arise. It is essential for buyers to get into a contract for the following reasons;
To maintain clarity on product specifications and avoid misunderstandings. The specifications of the product can be easily lost in Skype or mail communication.
Compensation terms help suppliers to think twice about compromise.
Contracts help to communicate on how severe your business is
It helps to avoid delays
The first time you work with a China plastic injection molding company (same to work with your local supplier), you should always make agreements on contracts to avoid scams and fraud. Suppliers who default the negotiations should be responsible for making refunds and necessary compensations.
7.Payment and Delivery
Based on the set agreement, the amount can be paid by one time or two times ( maybe more times). The payment method depends on the agreed strategy. Some companies make payments via Paypal, Skrill, Payoneer, Western Union, Cheque, or other policies. Our standard payment term is T/T wire transfer. If the small amount. PayPal is still available, this is method is normally working for all of the companies in China, especially for custom plastic molding manufacturing service.
Concluding Thoughts
Buying plastic molding from Chinacan be challenging. However, if you follow the seven steps, the process is easy and with no compromise. when you find your reliable partner from China, then your business will be increased rapidly, this is verified by lots of companies like Apple, and other car companies (over 80% of car companies buy their auto car molds from China), etc.
Doing online businesses have fraudulent operations. You should be cautious on the approach of doing business online to avoid frustrations, lots of company doing online business with China and successful to the business, also some of the customers had issues when doing business with Chinese mold manufacturers, or even have issues with your local supplier as well, do you agree? The above steps could help you avoid this issue and the success of your business.
Need any plastic injection mold/molding companies from China? Contact us now, you will find out we are your best partner in China. Welcome to talk with us on any questions.
https://plasticmold.net/wp-content/uploads/2021/04/injection-molding-factory.jpg6001200adminhttps://plasticmold.net/wp-content/uploads/2017/12/LOGO-1.jpgadmin2019-07-02 18:34:192024-10-26 12:05:55How To Buy Plastic Injection Mold and Molding Parts From China
Plastic injection mold and molding manufacturing company in China! Here you find information about custom plastic injection mold and molding processes, techniques, and specialized molding technology so that you keep yourself informed with the latest trends and technology.
We offer 30% savings for mold manufacturing and molding production services.
We have over 15 years of experience in plastic injection mold and molding manufacturing services, plus fluent technical English communication (technical English communication is very important when working with foreign customers).
We 100% guarantee that your project will be successful. You will be impressed and satisfied with our quality, price, and services.
Send us your requirements for a quotation; you will not lose anything but our competitive price for reference.
We are willing to sign an NDA document to protect your project, and we could send you our customer’s information so that you can verify our quality and services.
A plastic injection mold is made of metal steel that has been made with a hollow base apart, as sharp as you want, and later filled with a liquid or any other material that can be used to make your plastic products, which will last millions of cycles. Some of the materials that can be poured into the hollow space of the steel include plastic, metal, glass, and even ceramic materials. The liquid is allowed to solidify, and the block is broken to retrieve the mold that has acquired the shape of the block. A plastic mold is a custom mold that is used for making custom injection molding parts.
Plastic mold technology
Plastic mold technology is by far the most popular method to manufacture plastic parts in the world today. This process is used for everything from inexpensive commercial plastic products, like disposable eating utensils and toys, to severe environments and highly stressed technical components, like critical parts for the automotive and aerospace industries.
You’ll find extensive use of injection-molded plastic parts in the electronics world for things like enclosures for cell phones, computers, televisions, and the like, as well as in the medical world, where things like syringe bodies, breathing apparatus, and a wide range of other life-saving devices are employed. No other process has come to dominate modern manufacturing as much as plastic molding, and its use increases every year.
Recently, critical steering components for General Motors cars and trucks were changed from stamped and machined steel parts to a plastic-molded assembly, resulting in a lighter part at a lower cost, quieter, and more reliable.
What is Plastic Injection Molding
Plastic injection molding or injection molding is the process of heating thermoplastic resin to a liquid, then shooting it under high pressure into a mold cavity that is the negative image of the desired part, allowing it to cool, and then opening the mold to allow the completed part to be ejected out of the mold.
In most cases, features can be built into the plastic mold cavity to give the part everything it will need when finished so that no other operations are needed once the part comes out of the mold. Textures, or high polishes, markings, screw holes, lens shapes, and any other features needed in the finished part can be built into the mold, so the finished part automatically has these features incorporated.
The advantages of plastic molding
The beauty of plastic molding is that many parts, even millions, can be made in exactly the same way and will come out the same no matter what. Each piece will have identical features, the same dimensions, and the same physical properties. It is the ideal way to make high volumes because of this consistency. Properly maintained, injection molds can last decades, making millions of parts per year. Properly set up and controlled, the 20 millionth part will be identical to the first part in every measurable way. No other manufacturing process has the potential to operate at this level of consistency.
Multiple cavities of each part can be built into the plastic injection mold tool, so that each time the mold opens, you can make 16 or 32 or 48 or some other multiple of parts for each cycle of the injection molding machine to really increase the production rate and greatly decrease the cost of making a part.
In some cases, several different parts—for instance, a right- and left-hand version of an enclosure—can be made in a single mold to reduce the number of machine cycles required to make multiple parts of an assembly, increasing production and lowering the injection molding cost. Injection molding also offers flexibility not possible with any of the other manufacturing processes.
Injection molding also offers one of the lowest scrap rates of any other manufacturing process as well. Since no second operation is generally required, no material is cut off and thrown away. It is possible to use a special technique to completely eliminate even the small pathways the plastic flows through to cut the material scrap rate to virtually zero, or often, any plastic removed in the process can be reused by pelletizing it and mixing it back into the fresh plastic resin in closely controlled proportions. These capabilities mean a higher percentage of the raw material becomes part of the finished part than in any other process. Plastic injection molding is highly efficient.
Sincere Tech has been one of the top 10 mold manufacturers in China since 2005, located in Changping, Dongguan City. Sicnere Tech offers the plastic injection mold and molding manufacturing service. The company has shown promising growth each year; today, it accumulates to over 30 million RMB.
What makes us a unique plastic injection mold manufacturer?
With so many others in the business, what is it that has made us this successful in all these years? Let us take a look at some features that make us unique and a preferred choice for our customers.
It all starts with the plastic injection mold/molding factory.
Our plastic mold company is clean; everything is well ordered and well managed. When it comes to the technology we use, we make sure that at Sincere Tech we use nothing but the most advanced and high-tech available, be it for software or hardware systems around the factory. It helps us take control of the quality of the plastic mold we produce. To make goo- quality molds and parts.
We use a high-speed FUNAC CNC machine that was imported straight from Japan and has over 24,000 rotation speeds. Moreover, we have two big CNC machines with 2-meter strokes and a full automatic three-coordinate measuring (CMM) machine to ensure that our processes are fast, efficient, and precise. That high-tech equipment, plus our professional team, helps us meet our targets.
Professional team
We have over 65 staff members in our factory, and each one is an expert in his field and fully qualified to handle the different aspects involved in the injection mold making processes. From producing to managing the business, the team has been carefully selected to allow growth and give our customers premium-quality products.
All the engineers on our team have a good command of the English language to ensure adequate technical communication and a rich experience in the project. Even if you are not good at plastic injection molds and part design, our team will lead you and think through every detail on your behalf. This will help your project go smoothly and successfully.
Various Plastic Molded products Available
When it comes to plastic injection molds and injection molding parts, we have qualifications in a lot of fields and are experts in each one of them. The molds and molding parts we produce are used by consumers in household appliances, industries, food packaging, electronics, automobiles, interior parts in cars, etc. Our team puts in the same amount of attention and hard work in each one of these molds to maintain our loyal customer base.
Customer satisfaction
We realize the importance of keeping our customers happy and thus never compromise on quality. Our plastic injection molds last a long lifetime and always meet every expectation our customers might have of them. The molds and molded products we make pass every test they are put through and are accepted by customers from all fields equally well.
Affordable Price
With the quality we provide, one might expect our plastic injection molds to cost a fortune, but this is not so. All our molds and molded parts are priced very strategically to have market-competitive prices. The quality we produce is available at reasonable rates, and this is what has our customers choosing us time after time.
Customer service
Unlike other brands, we do not forget our customers even after the plastic injection mold has been shipped to our customer side. We provide efficient customer care services, and our staff is always ready to help before, during, or even after the sales have been made.
For us, we are not only the suppliers to the customers. Being on their side, we make every possible effort to ensure customer satisfaction. This is made possible by maintaining transparency in a communication system and ensuring a quick response to all problems they encounter.
So, what are you waiting for? Get in contact with our team right away and have them offer you the best plastic injection molds and molding parts for your project. For us, you are important. Making your business successful is our goal.
Thank you for considering Sincere Tech as your partner for all your plastic injection molding needs. As a leading China mold-making company, we are committed to delivering top-quality plastic injection molds and related services to our customers.
Our experienced team of professionals is dedicated to providing the best possible solutions tailored to meet your specific needs and requirements. With a user-friendly interface, navigating our website to find the products and services you need is easy. We offer a wide range of services, including plastic mold, custom plastic injection molding, rapid prototyping, mold design, post-manufacturing, assembly, and delivery.
At Sincere Tech, we pride ourselves on working with our customers from start to finish, whether you are in need of a single prototype or a large-scale production run. Our team is always available to answer any questions you may have and offer guidance and support throughout the process.
We are confident that our service, expertise, and resources will take your business to the next level. So, why wait? Contact us today if you are looking for reliable, affordable, and high-quality mold suppliers. We look forward to working with you!
English 
Italian 
French 
Spanish (Spain) 
German 
Russian 
Dutch 
Polish 
Turkish 
Arabic 
Portuguese 
Hungarian 
Czech 
Greek 
Finnish 
Danish 
Japanese 
Korean 
Swedish 
Norwegian 
Romanian 
Spanish (Mexico)