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.
Plastic Mold China is a major supplier of custom plastic molds due to its relatively low labor costs and strong manufacturing infrastructure. Many global companies source their plastic molding needs from China, taking advantage of the country’s capabilities in mold design, engineering, and production.
Mold produced gifts are of vital value throughout a wide variety of industries. Bringing on a China mold maker can simplify the process for all of the companies in the world. Plastic mold China manufacturer is a topic that has piqued the passion of major companies. But when businesses are going to compete in their market, they need to have in mind the basics of the method itself.
Why you should use plastic mold China service?
There are several reasons why companies choose to use plastic mold china service:
- Cost-effective: Labor costs in China are lower compared to other countries, making plastic molding services more affordable. This results in significant cost savings for companies that source their plastic molding needs from China.
- Experienced workforce: China has a large pool of skilled and experienced workers in the manufacturing industry, including in plastic mold. This experienced workforce ensures that plastic molds are produced to the highest standards of quality and precision.
- Advanced technology: Chinese mold manufacturers have access to and invest in the latest technology and equipment, including computer-aided design (CAD) and computer-aided manufacturing (CAM) systems. This allows them to produce high-quality molds with intricate designs and precise dimensions.
- Large production capacity: China is one of the largest producers of plastic molds in the world, with the ability to handle large scale production runs. This means that companies can meet their high-volume plastic molding needs in a timely and efficient manner.
- Strategic location: China is a global manufacturing hub, and its proximity to other Asian countries makes it an ideal location for companies looking to source their plastic molding needs. This also allows for easy and efficient transportation of finished products to other markets.
- Quality control: Many Chinese mold companies have strict quality control processes in place, ensuring that the finished products meet the highest standards of quality. This helps companies ensure that they receive consistent, high-quality plastic molds that meet their specific requirements.
The combination of cost-effectiveness, experienced workforce, advanced technology, large production capacity, strategic location, and quality control make plastic molding services in China a cost-effective and efficient solution for companies looking to produce plastic parts at scale.
These factors make plastic mold China service is a cost-effective and efficient solution for companies looking to produce plastic parts at scale.
Sincere Tech is a China plastic injection molding company, offer custom plastic mold & injection molded products to America, Europe, and the world, if you have a project in hands that need plastic mold china companies to help you, simply send us your part design or sample pictures, we will send you the best price and solutions for your project.
We guarantee we will never copy or share your data to any other third parties, we can sign NDA (Non-disclosure agreement) contract to protect your project.
Plastic injection molding is one of the emergent commodities out available on the market. The generation has the facility to create merchandise that may differently be difficult to create. Machines have to be optimally created to correctly sculpt the molding that may be made.
China mould manufacture companies at the moment are working with a wide array of industries the world over. This has helped China mold maker develop into the usual across the globe. Speaking with those out of doors industries will be a very powerful approach to increase the current supply line.
A few industrial owners want to get various custom plastic products from China plastic mold companies. Those mold makers will generally tend to specialize in the manufacture of various plastic components.
These could be pieced in combination through knowledgeable within the industry. Some business owners can put in combination these items themselves. Others might want to hire on a workforce to regulate this process from beginning to end.
Plastic Mold China has created a very powerful variable for the bottom line that companies need to understand. There are lots of who’re keen on following the blueprints that these manufacturers create.
They’re going to be keen to show off their manufacture procedure when they join up to a freelance deal. Those deals will usually remain for a time frame, giving owners a chance to evaluate the process itself.
There are some tasks that can be handled entirely by way of the mold manufacture industrial. There are a few China mould manufacture companies that can be offering exclusive deals so that you can attraction to business owners themselves. Viewing a gallery of projects will give customers a possibility to gauge what they’re dealing with.
The Injection plastic Mold China manufacturers industrial has helped some of the overseas companies reinvent themselves. for example, if you have a new project that you have been done the market research over one year or more, and find out this will be a huge market in the world.
Once you finished your design and prototype testing, then you need to look for a contract manufacturer to produce this new model for you, they may have lots of components that you need to source for, but the first thing is to find the plastic mold company, and check with them if they offer you assembly service or not?
Sincere Tech is one of top 10 mold manufacturers in China, we offer custom plastic mold/molding service, die casting parts service, painting, Chrome, spray, assembly, all in one service here to support you,
The advantages of choosing Sincere Tech as your China Plastic mold Maker
Sincere Tech supplies many kinds of injection molds, injection molding parts, plastic materials and several plastic molding technologies based on the requirements of the customers. The R&D department takes the responsibility of analyzing and designing the plastic parts according to the needs of the clients. The project department of the company will perform the foreseen inspection of plastic parts moldings structure, process, and related parts situation. The analysis is also done by the professionals whether the moldings are manufactured according to the design.
Sincere Tech will make a Professional MOLD FLOW analysis report for all of molds before mold manufacturing , those include temperature control, gate assignment, cooling time and analyze injection process which would enhance the mould design.
The project manager is responsible for the outline process, precision machining, rough machining, machine process, assembly inspection, colliding and assembly and molding test. Molding test is performed to check the dimension of the injection molding parts whether it matches with the mating parts. The QC department of the company will inspect the plastic parts mould on product size, injection process, appearance, and physical performance.
Sincere Tech will measure all of dimensions by CMM machine, besides, they will make many testing the product withstanding pressure, tensile strength, impulse loading, temperature resistance, and impact resistance. The company has as an abundant experience which is applied in the production of plastic part moldings so that the customers will be provided with the products of a superior standard.
The plastic parts are subjected to various surface treatments to make the plastic molded parts having an excellent shape which is related to the customers’ need. According to the order documents, the company will perform a strict inspection before the shipping of the products. If you want to know more information regarding the injection molding parts or if you have any project that needs an injection mold china company to support with injection mold making and injection molding parts production, welcome to send us your RFQ, we will quote you in two working days.
Engineers speak good English and have rich technical experience, this will make sure all of the issues will be fixed after the first mold trial, the technical guy will keep an eye on the project from the first beginning to the end. most of our project is approved by the customers after the first samples received, all of these successes are Credited to our professional team.
Looking for plastic mold China partner? Send us an email to get price call us to discuss your project.
Overview of the China Mold Industry
China Mold Maker is one of the most important mold makers in the world. China is home to different categories of moldmakers, and this usually presents a challenge to anyone looking for a mold maker in the country. Many first-time buyers are usually amazed by the sheer availability of mold makers but soon come to realize that they should have taken more time in selecting the most appropriate and suitable mold maker.
It is relatively easy to spot a good mold shop in most of the developed countries, such as the United Kingdom, America, or Japan. Of course, the price is very high, but the case is quite different in China. This is because the numerous mold makers in the country do not all make high-quality molds. Instead, a good number of these mold makers usually produce low-quality molds that are mainly tailored to satisfy the needs of the local market.
Be that as it may, this is not to say that it is impossible to find the best mold maker in China. This is because there are an equal number of mold makers in the country, and all one needs to do in order to spot them is take time and carry out appropriate market research.
Why do you need service by China mold maker
One of the main reasons why many plastic injection molding companies are buying plastic injection molds from China is the affordability of these molds. China injection mold is significantly cheaper than molds from othercountries,s especially molds from western mold manufacturing companies.
In order to save money, many countries are indeed trooping to China to take advantage of this price variation. Despite this affordability, it is important for companies to take several steps in order to ensure that they do not fall prey to the numerous low-quality Chhina mold makers.
First and foremost, companies should carry out comprehensive research on the available China mold makers. Before making the final purchasing decision, companies should inspect the quality of the molds made by different Chinese mold makers and ensure that their purchasing decision is informed by this inspection.
In addition to inspecting the quality of the molds, companies should scrutinize the terms and conditions of the mold suppliers. This should enable the company to enter into a contract with the mold makers who offer the most suitable terms. For instance, one of the most important considerations to make when it comes to the terms of sale is the nature and period of the warranty. Companies should select injection mold makers in China that offer the most suitable period and warranty terms.
Finally, it is important to find a China mold company that can speak good English and a good
understanding of the mold technology. Since you are doing business far away from your country, you cannot come to China every time. Good communication and technical skills can make your project run smoothly and successfully. Below are some comments on technology that relate to plastic injection molds:
Plastic injection mold/molding technology
Plastic injection molding is what people call the process of filling a plastic mold with liquid plastic and cooling it for it to take shape. An injection mold maker is the company that makes the mold for injection molding. An injection mold maker makes molds from metals, usually steel or aluminum. The mold manufacturing process requires precision because a mistake means a repeat of the process or the part made will not function well enough and may be substandard.
The process of plastic injection molding relies solely on the accuracy of the injection mold. If the plastic injection mold maker makes a mistake in making the necessary molds needed to produce a plastic product, the overall effect will be defective. The mold maker must have precise measurements of the mold it will make in order to fully meet the standards of the manufacturer and client.
Materials Used in the Process of Plastic Injection Molding:
The usual materials used by plastic injection molding are plastic materials like polystyrene, acrylonitrile butadiene styrene, nylon, polypropylene, polyethylene, and PVC. These are thermoplastic materials that are usually used by injection molds and molding machines to produce the plastic parts that they will sell.
The polystyrene material is lower in cost and material grade. ABS is a plastic that is harder than the previous one but not as flexible. Nylon can resist most chemicals and is more flexible than the previous two. Polypropylene is the plastic usually used to manufacture containers because it is tough and flexible. There are many thermoplastic materials that can be used in the injection molding process. If you do not know which plastic is the best option for your project, you are welcome to contact us.
A plastic mold maker will have to make more molds if the molds are used for metal injection molding. Metal injection molding wears out the molds more than plastic molding because the melting temperature of metals is higher than that of plastics. Despite this additional cost, manufacturers still utilize injection molds for metal molding because the prices of metals that are molded this way are still profitable.
Welcome to Sincere Tech, who is a China Mold Maker, your one-stop-shop for all your plastic injection mold needs. We are one of the top 10 mold manufacturers in China that offers exceptional mold-making services to customers all over the world. Our team of highly skilled and experienced professionals is committed to delivering high-quality products and services that meet and exceed your expectations.
Our Services
At Sincere Tech, we offer a wide range of services to our customers. Some of our services include:
- Plastic Injection Mold Making: We specialize in the production of plastic injection molds for various industries. We use the latest technology and equipment to create high-quality molds that meet your exact specifications.
All of our export molds use HASCO or DME mold components so that the customer can change the mold components easily. We offer a lifetime warranty for our export molds, including both a half-million shot (pre-hardening mold steel such as P20, S136, NAK80, etc.) and a million shots (hardening mold steel such as 1.2344, 1.2343, H13, etc.). Depending on our customers requirements, during this warranty time, if any issue happens, we make free inserts for our customers with no cost. - Mold Design and Engineering: Our team of experienced designers and engineers works closely with you to design complete 3D mold drawings that are tailor-made to your specific needs.
- Rapid Prototyping: We offer rapid prototyping services to help you test your product designs before mold manufacturing. This helps to reduce development time and costs.
- Injection Molding: We have a state-of-the-art injection molding facility that enables us to produce high-quality plastic products for a wide range of industries, including overmolding, insert molding, medical injection molding, and many more.
- Mold Maintenance and Repair: We offer maintenance and repair services for molds that are worn out or damaged. Our team of experts will diagnose the problem and provide the necessary repairs to ensure that your molds are in perfect working condition.
Why choose the ST China mold maker?
At Sincere Tech, we pride ourselves on providing exceptional services to our customers. Here are some of the reasons why you should choose us:
- Quality Products: We are committed to delivering high-quality molds and products that meet and exceed your expectations.
- Experienced Professionals: Our team of experienced professionals has the expertise to handle all your plastic injection mold needs.
- Competitive Prices: We offer competitive prices without compromising on the quality of our products and services; mold costs as little as $500. Contact us for a quote.
- Fast Turnaround: We understand the importance of meeting deadlines, which is why we strive to deliver our products and services within the shortest time possible.
- Customer Satisfaction: We are committed to ensuring that our customers are satisfied with our products and services. We work closely with you to ensure that your needs are met. Our engineers speak good English and have 10 years of technical skill. This will give us the best service to our customers. Our engineers will keep our customers posted every week and inform them of the manufacturing status of every project.
If you have a project that needs an injection mold maker from a Chinese company, please don’t hesitate to contact us. We will quote you the price in 24 hours.
Looking for plastic injection molding service?
Contact us to get quote, we are A Custom injection mold maker in China that offers plastic injection molding services.
The excellent quality of our plastic molds and molded parts, coupled with our experience and the performance of our services give us today a high international recognition. Indeed, the company is specialized in International Business and has customers all over the world. SINCERE TECH has very high standards of quality control and always runs long tests to make sure that our Plastic Injection Molding Service reaches all the expectations of our customers. We believe that the quality of a company and its products are seen through time and this is why we like to build strong long-term partnerships with our customer
What is plastic injection molding process?
Plastic injection molding is a manufacturing process in which melted plastic is injected into a mold and then cooled to form a solid part. The mold is created from a metal or plastic tool (1.2344, H13, NDK80, etc.) and is typically made in two halves that are clamped together. The plastic material is heated in a barrel and then forced into the mold under high pressure where it cools and solidifies into the desired shape. This process is used to produce large quantities of identical parts with high precision and repeatability.
When do you need plastic injection molding service?
You may need plastic injection molding service when you require mass production of plastic parts with consistent quality and high precision. This process is ideal for producing large quantities of the same part, as the mold can be used multiple times to produce identical pieces. Additionally, plastic injection molding is well-suited for producing complex and intricate shapes that would be difficult or impossible to achieve with other manufacturing methods. This process is often used in various industries such as automotive, consumer goods, medical devices, and electronics.
plastic molding services
Benefits of plastic injection molding service
The benefits of plastic injection molding service include:
- High volume production: Plastic injection molding is ideal for high volume production of identical parts, as the mold can be used multiple times.
- Consistent quality: The process is highly repeatable, which leads to consistent quality of parts produced.
- Complex shapes: Plastic injection molding can produce complex and intricate shapes that would be difficult or impossible to achieve with other manufacturing methods.
- Material flexibility: A wide variety of plastic materials can be used in the injection molding process, including thermoplastics, thermosets, and elastomers.
- Cost-effective: The process is efficient and cost-effective for producing large quantities of parts, as the cost of the mold can be spread over many parts.
- Precision: The process can produce parts with high dimensional accuracy and minimal tolerance variation.
- Automation: Plastic injection molding machines can be automated for increased productivity and reduced labor costs.
Plastic injection molding is a versatile and reliable manufacturing process that can provide significant benefits for producing large quantities of complex and high-precision plastic parts.
Plastic Injection Molding Service in China
We are the manufacturer of our own moulds (toolmaker or plastic injection tooling) and support the production of Injection molded parts allowing reducing your numbers of suppliers. Our injection machines have clamping forces going from 60 to 1050 Tons (2000 Tons outside). Plastic injection molding is the process of producing parts from thermosetting and thermoplastic materials.
Our qualified teams of Designers, Quality controllers and our Research and Development Department allow us to complete our policy: achieving Customer Satisfaction through Improvement and Innovation. The quality of our products and organization permits us to obtain quality certifications (ISO 9001, ) and be awarded numerous times of “Quality Supplier” from different customers. We integrate constantly new resources into our process in order to anticipate any future need of the plastic injection molds market and we became one of the most innovative companies in the sector. The modernity and the organization of our facilities allow us to adapt very quickly to the customer’s needs.
SINCERE TECH has always the objective to stay one of the innovative leaders of the sector and play an important role in our customer’s development. The firm can now propose a total solution from mould design to the semi-finished product (All in-house). SINCERE TECH is always willing to integrate new processes to the solution proposed by staying aware of new technologies. If a customer has a special requirement, we will do everything to fulfill its needs.
Plastic Materials /Commodities
We are used to working with all the classic and less classic plastic materials except PVC (PP, PE, PC, ABS, PC+ABS, PA 6, PA 6.6, PBT, PMMA, TPU, PC+GF, AS, PTFE, POM, PEHD, PEEK…). Our main suppliers are Sabic, Bayer, and Chimei.
About the steel used for our moulds, for export plastic molds we work only with the best steel suppliers like Assab (Sweden), Buderus (Germany), Daido Steel (Japan) LKM( the biggest one in China). For our standard component suppliers, we work with Hasco and DME.
We are used to working with our suppliers the same way we work with our customers. It means good long-term relationships with high-quality policy.
Complex moulds: SINCERE TECH has a rich experience in difficult plastic mould and parts, complex moulds and is an expert in finding solutions to your issues. SINCERE TECH is a real specialist in difficult tooling. To give a classic example: many design companies create plastic products without thinking about mould construction. Then, when the designs are sent to toolmakers, it can be hard for them to make the exact parts (Difficult design, many sliders, many lifters, double injection with materials non-bonding well together, many details in awkward places…).
Most of the classic toolmakers will accept the parts and say that they are able to do it. And then, they will have problems with the plastic injection mould construction, the lead time will be extended and the quality of the tool will not be as expected. Often, these companies have to contact SINCERE TECH to help them to resolve their problems. If you are not sure about the complexity of your part, be sure about your mould maker’s professionalism. SINCERE TECH works closely with its customers in order to resolve any issues.
Thin Wall injection molding: it permits a precise, very accurate molding of plastics and gives better details to the product. This is the name referring to products with a wall thickness lower than 2mm. Usually, the flow is quick, permits a short cycle time and a cost-saving.
Hot runner mold: the special process of injection of plastics where the plastic is kept hot when going through cavities of the mould while the rest of the mould is getting cold to solidify the plastic part and create the molded part: this permits to save plastic material. This is mainly used for parts with medium or large sizes. We are used to working with all popular companies like Yudo, INCOE, Synventive, Husky, HRS… We also have the technology to make our own hot runner systems if the production of the parts (Molding) is made in-house. This again allows our customers to save costs.
Optical Lens Molding: precision molding for glass plastic. This is the technique to produce transparent plastic molded parts (For example Security cameras parts such as the dome cover or also phone frames).
Gas-assist Injection Molding: the plastic parts are gas-assisted molded which means that gas (Most often is nitrogen) is injected at the final stage of the part creation process. It permits to reduce the cycle time, the product weight, the risk of deformation and also the pressure tons injection needed. Moreover, it makes the part’s structure stronger with a better look.
LED/LCD frame molding: injection of plastics used for example to manufacture television screen monitors, computer back-light modules, GPS frames…
IMD, IMF, IML, IMR Molding: In-mold decoration. The decoration of the part is made inside the mould through a film. The film is printed before the molding with the designs wanted. It permits better productivity and extends the decoration’s lifetime. If the customer wants to change the design/decoration of the part, it is not necessary to make another mould but only to change the film. SINCERE TECH is experienced with In-mould forming, in-mold-labeling, and in-mold by roller.
Overmolding: this technique permits to join several components together with a thermoplastic material. This reduces assembly and labor costs. Because the parts are made together, this allows less risk of improper termination or misalignment and increases the design flexibility. Moreover, thermoplastic provides better resistance to vibration or shocks. This technique permits to increase resistance, reduce costs and weights.
Insert Molding: this is a technique where a small part (Stamping part, optical part…) is added or inserted to the Injection molded part.
Two-Shot Molding: 2 independent injection units using 2 different materials and/or colors. The first material is injected; then, the mould rotates and the second material is injected to make 1 part. It permits a 2-colour-molding or also called double injection, 2 shot molding, two-shot injection, overmolding, 2K injection, two colour injection, bi-injection, dual shot molding or multi-component molding.
CNC Technology. CNC is an abbreviation for Computer Numerical Control. This is a machine extremely accurately controlled by computer programs permitting a CAM (Computer-aided Manufacturing) through a CAD (Computer-Aided Design). Any plastic injection tool manufacturer uses it but the value-added of SINCERE TECH is the experience, professionalism, and training of the staff.
FMMS Molding or can be called RHCM (Rapid Heat Cycle Molding): excellence surface appearance: permits to take off the welding line. This process is integrated into the molding to save time. It is used for example for clear plastic parts.
US Welding: Ultrasonic Welding: process to weld/ join/ assemble plastic parts thanks to ultra-sounds.
Silk-Screen Printing: this is to print logos or designs on parts.
Dip-Coating: this is the process of putting the component inside a liquid solution to apply a thin film on it. It permits to manage, change the hardness, the strength of the part by protecting it and expanding the lifetime of the product. Then, the excess liquid has to be drained and evaporation of the solvent is done to create the thin layer.
Laser Etching: this process is made for cutting a shape, a pattern, an image on the plastic part. It is also called laser graving.
Sputtering coating: this is the process of creating a very thin layer of conducting material on the component. It is also called Plasma Enhanced Chemical Vapor Deposition (PECVD) and can be done with most metals like aluminum, stainless steel, copper…
EMI shielding: protect parts from electromagnetic interferences. It is used to protect electrical signals from the outside world. For instance, we use it with marine radars for Garmin.
Waterproof technology: SINCERE TECH has the experience to make water-resistant parts and is able to ensure in-house tests thanks to the IP68 tests.
Sub-assembly: this is the pre-assembly of a component who will be later on being assembled in a larger product.
R&D: SINCERE TECH has its own Research and Development department in order to work with the customers on their projects, advise them on designs, resolve issues and study the feasibility of those.
Quality Control: We have very high standards of quality control in order to respect any requirements from our customers. We have a 100% quality control on our plastic molded parts, it means we control any part coming out of our production.
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 plastic injection molding service partner 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 Mould suppliers for your custom plastic injection molding service, 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.
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