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Injection Mold

Injection Mold

In modern industrial production, mold is an important technology used in shaping products (including metal products and nonmetal products) for all of the industries. Meanwhile, it is the ‘magnifying glass of efficiency and profit’ to the raw material and equipment, because the value of the final product made in the mold is often tens of, even hundreds of times as valuable as that of the mold itself.

The mold industry is the basic industry of the national economy, and it is called ‘the mother of industry’. Every aspect of human life such as clothes, food, housing, and transportation is closely connected with the mold industry. Therefore, the level of injection mold technology has been a significant symbol to measure a country’s developing level of mechanical industry.

And mold can be divided into two kinds of them: mold for metal products and nonmetal products.
The metal products mold include cold-press mold, pressing mold, forging mold, press casting mold, precise casting mold, stamping tool, punch tool, and dust metallurgy mold, etc. These kinds of mold have extensive apply-cation in electrode-cranial products, automobiles, aviation instruments, and other metal products.
The nonmetal products include plastic injection mold, ceramic mold, rubber mold, glass mold, food mold, and ornament mold. These kinds of molds have extensive apply cation in our lives, at this page we are talking about injection mold. this is the most papular modern technology which used in our life everywhere.

An injection mold used to form a plastic product using the injection molding process. A standard injection mould is made of a stationary or injection side containing one or more cavities and a moving or ejection side.

The resin, or raw material for injection moulding, is usually in pellet form and is melted by heat and shearing forces shortly before being injected into the mould. The channels through which the plastic flows toward the chamber will also solidify, forming an attached frame. This frame is composed of the sprue, which is the main channel from the reservoir of molten resin, parallel with the direction of the nozzle, and runners, which are perpendicular to the direction of the nozzle and are used to convey molten resin to the gate(s), or point(s) of the gate and feeding the molten material into the mold cavity. The sprue and runner system can be cut off and recycled after molding. Some moulds are designed such that it is automatically stripped from the part through the action of the mould. For example, the submarine gate or banana gate, if using hot runner systems then there will be no runners.

The quality of the injection molded part depends on the quality of the mould, the care taken during the moulding process, and upon details of the design of the part itself. It is essential that the molten resin is at just the right pressure and temperature so that it flows easily to all parts of the mold. The parts of the injection mold must also come together extremely precisely, otherwise small leakages of molten plastic can form, a phenomenon known as flash. When filling a new or unfamiliar mould for the first time, where shot size for that particular mould is unknown, a technician should reduce the nozzle pressure so that the mold fills, but does not flash. Then, using that now-known shot volume, pressure can be raised without fear of damaging the mould. Sometimes factors such as venting, temperature, and resin moisture content, can affect the formation of flash as well.

Injection Mold Material

Traditionally, molds have been very expensive to manufacture therefore they were usually only used in mass production where thousands of parts are being produced. Injection Molds are typically constructed from hardened steel or aluminum. The choice of material to build a mold is primarily one of economics. Steel molds generally cost more to construct, but their longer lifespan will offset the higher initial cost over a higher number of parts made in the mold before wearing out. Aluminum molds can cost substantially less, and when designed and machined with modern computerized equipment, can be economical for moulding hundreds or even tens of parts.

Requirements for the injection mold

ejection system

An ejection system is needed to eject the molded part from the cavity at the end of the molding cycle. Ejector pins built into the moving half of the mold usually accomplish this function. The cavity is divided between the two mold halves in such a way that the natural shrinkage of the molding causes the part to stick to the moving half. When the mold opens, the ejector pins push the part out of the mold cavity.

cooling system

A cooling system is required for the mold. This consists of an external pump connected to passageways in the mold, through which water is circulated to remove heat from the hot plastic. Air must be evacuated from the mold cavity as the polymer rushes in. Much of the air passes through the small ejector pin clearances in the mold. In addition, narrow air vents are often machined into the parting surface; only about 0.03 mm (0.001 in.) deep and 12 to 25 mm (0.5 to 1.0 in.) wide, these channels permit air to escape to the outside but are too small for the viscous polymer melt to flow through.

Use of plastic injection molding

Plastic injection molding is the most common and widely used method for the mass production of plastic products around the world because of its convenience and ease of use. Plastic products made using this method include plastic chairs and tables, electronic product covers, disposable spoons and knives, and other cutlery products.

History of injection molding

Plastic injection molding was started by European and American chemists who were experimenting with plastics. Originally done manually and pushed into the mold using Parkesine, it turned out to be too brittle and flammable. John Wesley Hyatt is the official inventor of plastic injection molding, and this process has a rich history with a brilliant spirit.

Injection molding was originally invented to solve the problems that billiard players face abundantly. The 19th-century billiard balls were made of ivory derived from tusks taken from elephants. Celluloid was one of the first plastics used to make billiard balls.

Plastic Injection Molding

Plastic Injection Molding

Instructions for the procedure

The scientific procedure used to produce plastic products by applying injection molding is very simple. Your plastic melts and is put into a huge syringe. It is then placed in a suitably shaped mold depending on the product being manufactured and allowed to cool for a sufficient amount of time to reach the desired shape. However, the actual process of actual injection molding is not so simple and can be broadly divided into three subdivisions: injection unit, molding section and finally clamp. The plastic pellets are gradually liquefied and gradually injected into the injection unit through a tunnel that is completely melted until it reaches the front of the barrel. When it reaches the mold, it cools and hardens to the desired fixed shape. The mold will then return to the original machine position.

All injection molded parts start with plastic pellets with a diameter of a few millimeters. They can be mixed with certain limited amounts of pigments called “colorants” or up to 15% recycled material. The mixture is then fed into an injection molding machine. Early molding units used a plunger to push down from above. However, the outer area was hot or cold and the melting process did not work properly. The solution to this was a reciprocating screw. This was often seen as the most important contribution that was none other than a revolution in the plastic product manufacturing industry. The screws cause the shear stress necessary to melt the plastic, and the rest of the heat comes from the traditional heater band that surrounds the machine. When molten plastic is injected into the mold, the air is released through the sideways vents. The honey viscosity plastic is so thick that it cannot be released from these vents, which are only a few microns wide.

Engraving witness marks on plastic products is also an important part of marketing. This is because we need to be able to authenticate and verify the authenticity of the product by looking for a line separate from the witness mark. These are created using removable inserts and can prove very helpful in tracking defects.

If you are looking for injection mould and injection molding parts?

You are welcome to send us your requirement for quote, you will have our competitive price within two working days.

If you have injection mold technical question?

You are welcome to contact our technical Manager to solve your technical issue by steve@sinceretechs.com.

We have over 15 year working experience with 15 years skilled technical English communication.

Your project will be successful with our supporting, we guarantee your satisfaction.

What are you waiting for? Contact with us you will not lose anything buy have your technical issue solved.

Injection Mould China for your market

When it comes to injection mold manufacturers china, there are a number of misconceptions that people typically have. One of the biggest misconceptions is the sense that an operation that is being conducted in China is one that is largely unreliable. This cannot be further from the truth. In fact, this is an extremely reliable operation that is based in China and is turning out products that are of high quality. In order to fully understand this, it is equally important to understand the history of this type of operation as well as its current status.

Injection mold china

Injection mold china

What makes this particular operation better than those that have come before it? In the past, the the hallmark of operations of this type were that quality was sometimes not consistent and sometimes quality barely existed at all. This is especially true of some of the operations that were conducted in China. As a result, people started to have their fair share of doubts about whether or not plastic mould injection operations within the country of China could produce products of reasonable quality. Fast forward to today and those questions have been answered.

In truth, today’s operation is quite reliable and very successful. The reliability issues have been successfully put aside and any questions about quality have them put to rest long ago. Today’s operation distributes products to multiple international customers and is able to produce virtually any type of moulded plastic product for any use. The entire system utilizes a state of the art process, using the latest software to design the products that are ordered and then mass produce them as quickly and efficiently as possible. All of this is done without compromising quality in any way, shape or form.

The best part about it all is that the mistakes that were made throughout the early history of such operations has been taken into account in order to ensure that those types of issues do not happen when products are produced today. In fact, there are more than 15 years worth of operations from which to gain experience and perfect the way that everything is handled ranging from the way that orders are taken to the way that they are produced and shipped out. The fact that software is used to create virtually any type of product minimizes the chances for errors and allows everything to move along very rapidly. The end result is that the only limitation on the types of products that can be produced is the imagination of the individual who is ordering the product in the first place.

In addition, each product gets its own project manager and everything can be produced at a cost that is more than reasonable. This helps to proliferate these types of operations and even though the system is based in China, high quality products are produced each and every day which are then shipped out to locations all over the world. Imagine virtually any plastic mold part such as those parts used for calculators, DVD players or printers, and they can probably be traced directly back to operations of this type. Without them, it would be virtually impossible to operate in the world the way it is understood today.

Why Choose China Plastic Injection Molding Service?

China is well known as a manufacturing center and as an exporter of plastic products. Chinese plastic injection molding manufacturers guarantee high-quality products that are reliable and long-lasting, there are many plastic molding companies in China, it is a headache for you to find a right China mold maker from that huge resource, Sincere Tech is one of the top ten best plastic mold and molding companies in China, we offer you the 100% satisfied quality and service, go to our home page by https://www.plasticmold.net/ to know more.

All of the information we referred from Wikipedia, but we sort out together for easy to read, if you want to know more, please go to injection mold Wikipedia.

If you want to know more information about products made from injection mold china company? You are welcome go to our home page to know more, or send us email,we will reply you with 24 hours.

 

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Plastic Product Design Service

product design and manufacturing

Plastic Product Design Service from plasticmold.net

Plastic product design service according to your sketch or samples, Change Draft Directions, Initial Design Consultation, Improve Efficiency, Change Draft Directions, Eliminate Undercut, Eliminate Sink Marks

SINCERE TECH can produce a plastic product design from your concept, sketch, samples or modify your product designs for required changes on most plastic parts.

SINCERE TECH, one of the most trusted top 10 plastic injection molding companies in China that offers mold design, injection molding service, injection mold making, and engineering, will consult on the initial design, or design enhancements to help improve efficiency in the  manufacturing process, including:Plastic Product Design

  • Changing draft directions
  • Design concessions for radii and step-throughs
  • Undercut elimination
  • Coring to eliminate sink marks

All the above design improvement has no cost

Perfect Plastic Product Design will make High-Quality Molds, high-efficiency molding production, cost saving on both molds and molded parts

Craftsmen at SINCERE TECH are capable of constructing intricate and efficient molds quickly, whether they be simple single-cavity mold or complex multiple cavity mold. All SINCERE TECH molds are designed to use high-quality mold bases and mold steels; and are engineered for maximum process windows, ease of repair and long life.

We have a wide range of manual, automatic and computerized mold making equipment to accomplish our goal, including:

  • Mills
  • Grinders
  • EDM Machines
  • Drills
  • Lathes
  • Saws
  • CNC Machining
  • CNC Programming
  • Design equipment and software
  • Inspection and Measurement
  • Polishing Tools

Our plastic mold makers are fully qualified and skilled at using modern production techniques. Using our computerized CNC (Computer Numeric Coordinates) System (CAD/CAM), SINCERE TECH team are able to produce new custom molds with cost-saving speed and accuracy or troubleshoot your existing molds.

Whether the job calls for conventional, hot, or insulated runner systems, SINCERE TECH toolmakers have the experience to design and build the mold correctly.

Advanced Plastic mold making technology allows us to design and produce molds for a wide variety of plastic part applications,

If you have your plastic prodcut design ready and look for plastic mold making service, you are welcome to send us your design, we will offer you the best price. If you only have samples or sketch, you are welcome to contact us as well, we will make plastic product design, mold making, injection molded parts for you by the best solutions,

We never share your data with any other third parties, we can sign NDA document to protect your project,

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Custom Plastic Injection Molding China

hdpe injection molding

Custom Plastic Injection Molding China Service – Affordable Custom Parts

Sincere Tech is a well-established custom plastic injection molding company in China that provides high-quality custom tooling and molding solutions. We provide solutions for manufacturing services such as raw material testing, tool manufacturing, molding, surface finishing, and product testing to suit the various needs of customers. Our team of engineers is highly qualified and can ensure the professional execution of orders of any size and complexity.

Our Custom Plastic Injection Molding Services Include:

Custom Rapid Prototype Tooling and Low Volume Injection Molding.

  • Perfect for prototyping or creating a few pieces of the product at a time.
  • They can range from simple machines capable of producing between 50 to 5,000+ parts.

Custom Bridge Tooling and Medium Volume Rapid Injection Molding

  • Ideal for market entry strategies.
  • Manufactures 5000 to 100000+ components.

Custom Production Tooling and High Volume injection Molding.

  • It was created for the mass production of bicycles.
  • Produces 100,000+ parts.

With over a decade of experience in On-demand manufacturing solutions, we have helped many of our customers produce their parts using custom plastic injection molding. We are excited to work with you and bring your products to life accurately and quickly.

custom plastic injection molding China

What is Custom Plastic Injection Molding?

Custom Plastic Injection molding is an efficient process of manufacturing custom plastic parts in any quantity, small, medium, or large. This involves the use of molds where the molten plastic material is poured and allowed to cool and harden to the required shape. This cycle is repeated hundreds or even thousands of times, which enables the production of several custom plastic parts at once. The cost of the custom mold is distributed over the number of parts manufactured, which makes the price per unit only a few $$s or even less. Custom plastic injection molding guarantees uniformity of the parts produced and has more material, color, cosmetic, polish, and surface finishing possibilities than 3D printing or CNC machining.

Sincere Tech is a specialized custom plastic injection molding company that provides prototypes and short-run and volume-run custom molding services. We offer custom plastic parts that meet your exact design requirements while being affordable. Our professional engineering department consults with every injection molding quote offered to customers to facilitate an easy transition from design to production.

Types of Custom Injection Molding Services at Sincere Tech

Sincere Tech is a prestigious custom plastic injection molding services company in China that specializes in providing different types of molding services for low to high-volume production requirements. Here’s a brief overview of the types of injection molding services we provide:

1. Custom Clear Injection Molding

Process: This is a process that involves the use of plastic materials that are transparent to produce parts that need to be precise or semi-clear.

Applications: Suitable for products such as lenses, light covers, and other translucent parts.

Normal material: PC, PMMA, PS, ABS, etc.

2. Custom Insert Molding

Process: Insert molding is a technique in which metal or other parts are placed inside the plastic during injection molding.

Applications: Typically used for manufacturing components with metallic inserts, including threaded bolts, bearings, or electrical contacts.

Normal material:  ABS, PC,PP,PA66, PMMA, PE, PET, PPT, etc

3. Custom Over Molding

Process: Overmolding is a two-shot process in which a second material is molded over an existing part or base material.

Applications: Ideal for manufacturing components made of several materials, for instance, handles with soft grips or cases with seals.

Normal materials: TPE, TPU, ect.

4. Custom Thread Molding

Process: This technique involves the formation of internal or external threads in the molded plastic part without the need for subsequent screw cutting.

Applications: Applicable to parts that require screwing or joining, for instance, caps, closures, and threaded inserts.

Normal material:  ABS, PC,PP,PA66, PMMA, PE, PET, PPS, etc

5. Custom Rubber Molding

Process: Rubber molding entails using elastomers to create flexible, strong parts and components.

Applications: It is recommended for use in gaskets, seals, o-rings, and other components that need to be flexible and have high recoverable elasticity.

Normal material: Rubber.

6. Custom Silicone Rubber Molding

Process: Silicone rubber molding uses silicone to create parts that are thermally stable and able to withstand weathering.

Applications: Applicable for use in medical devices, kitchenware, seals, and gaskets.

Normal material:  Silicone, rubber.

Our technical experts are committed to delivering the best molding services that meet your precise needs. From prototypes to short runs and total production runs, our team of engineers will help make your project successful. Explore China’s best custom injection molding services today, or discuss your injection molding requirements directly with our representative.

China Mould Maker

Customized Injection Molding Costs

The price of customized injection molding is not standard and depends on how you engage our services and your project specifications. Generally, the cost can be broken down into two main components: the total cost of production and the price of the mold or the tools that are used in the production process.

Tooling Cost/Injection Mold Cost/Rapid Tooling Cost

Making the custom mold entails other costs that are not included in the total cost of production. The custom mold cost is paid at the beginning of the injection molding process and depends on the blueprint design of the mold. The time it takes to create a mold depends on the mold’s design and its intricacy. Plastic parts production is initiated only after the mold has been made or finalized. There are two types of manufacturing processes for mold creation: rapid manufacturing and conventional manufacturing, with different prices and production approaches.

If you want to know more about custom mold cost, pleae go to injection molding cost and how much does an injection mold cost page to know more.

Key Factors Influencing Customized Injection Molding Cost

The following steps are involved in customizing injection molding molds.

Design Blueprint and Complexity

The level of preparedness and the level of complexity of the product design is a key factor that influences the costs. The complex designs require more complex molds and take more time to make.

Raw Materials

The cost is determined by the type and quality of the material used on both the plastic products and the mold. In general, it can be stated that the acquisition of higher-grade materials is more costly than that of lower-grade ones.

Manufacturing Technology

The choice between rapid manufacturing and traditional manufacturing technologies is based on cost. Although rapid manufacturing is faster, it is expensive.

Tooling Process

The following are some of the factors that can be associated with the tooling cost: the design of the mold, its features, and the material used to construct it.

Project Requirements

The cost may also be affected by schedules and certain specifications of the project. This may force the client to order rush services which are usually costly.

Additional Processes

Other operations such as branding, pad printing or any other special operations will also add to the price.

The cost of injection molding is determined by the design of the product, the quality of the material used, the technology used in production, and other factors of the project. At Sincere Tech, we offer tailor-made solutions to your needs, whether it is a one-off or a batch run. For more information and to get an online quote for your project, please do not hesitate to contact us.

custom plastic injection molding services

Custom Plastic Injection Molding Method

Custom plastic injection molding entails the use of injection molds, and the quality of the final products depends on the molds and their design. In addition to the molds, technical know-how and experience are crucial in arriving at the structure and design of the injection products and the molds.

Mold-making is one of the core departments in our company, equipped with the most modern tools and employing highly qualified and scientifically oriented staff. This makes it possible for us to have good quality molds and also makes it possible to offer the molds at an affordable possible price and within the shortest time possible.

We also provide technical consulting services for selecting appropriate plastic materials for products. When our customers use large plastic molds for their products, they can benefit from our experience in different engineering plastics. We deal with all types of engineered plastics, including conventional plastics and high-performance thermoplastics, to ensure that we select the right material for the particular application.

Our competencies include all types of large plastic molds and materials, and it has been realized to incorporate high-performance thermoplastics into the large plastic molding.

In addition to the general categories of thermoplastic injection molding services available today, our company provides several particular injection molding services to meet our client’s requirements. These are specific processes designed for specific uses, needs, and problems.

Thermoplastics Materials We Processed

At our In-house set-up, we process the following custom molded plastic products;

ABS (Acrylonitrile Butadiene Styrene)

ABS is a general-purpose thermoplastic with good impact strength and a high degree of hardness. Its tensile yield strength is 6,500 psi, suitable for many engineering applications that demand strength and durability. Go to ABS injection molding to know more.

Polypropylene (PP)

Polypropylene is a thermoplastic polymer widely used in many applications because of its flexibility and strength. It has a tensile yield strength of 4,900 psi and is used where good chemical resistance and processability are needed. Go to PP injection molding to know more.

Polyoxymethylene (POM):

POM, also known as acetal, is a thermoplastic material with low friction, high stiffness, and good dimensional stability. With a tensile yield strength of 10,000 psi, it is suitable for applications that require high accuracy and mechanical strength of the parts. Go to POM injection molding to know more.

Polycarbonate:

Polycarbonate is a thermoplastic polymer with high heat resistance and impact resistance. It has a tensile yield strength of 9000 psi and is used in applications that demand clarity and strength like eyeglasses and electronics. Go to Polycarbonate injection molding to know more about PC molding.

Polycarbonate/ABS Blend:

This is a combination of polycarbonate and ABS that results in the formation of strong and durable parts. It has a tensile yield strength of 8000 psi and is mainly used in automotive and electronic housing industries. Go to PC/ABS injection molding to know more.

PVC (Polyvinyl Chloride):

PVC is a polymer that has good electrical insulating property, high hardness, and good mechanical property. It has a tensile yield strength of 4,500 psi and this makes it suitable for use in many industries and construction activities.

Nylon:

Nylon is a strong polymer material with high elongation and relatively good wear resistance. It has a tensile yield strength of 8,400 psi and is applied to gears, bearings, and wear-resistant components. Go to Nylon injection molding to know more.

Nylon 30% Glass Fiber:

This nylon composite has enhanced mechanical strength and thermal stability, and the tensile yield strength is 18,000 psi. It is applied in areas where high strength and stiffness of the structure are required. Go to Glass filled Nylon injection molding to know more.

Acrylic (PMMA):

Acrylic is quite popular for its strength, which makes it ideal for use in areas likely to be exposed to pressure. It is commonly used in applications that need to be transparent. It has a tensile yield strength of 9400 psi and is used for lenses, displays, and light guides. Go to PMMA plastic injection molding to check more.

Styrene:

Styrene is another type of plastic that is lightweight and has high impact strength and toughness. It has a tensile yield strength of 6,530 psi and is employed for packaging, disposable cutlery, and modeling.

Polyether Imide (PEI):

PEI is a thermoplastic with high temperature tolerance and good mechanical properties. Its tensile yield strength of 16,000 psi makes it suitable for aerospace, automotive, and medical applications.

custom plastic injection molding

Quality Assurance & Surface Finishing Options For Custom Injection Molded Parts

At Sincere Tech, we know how vital it is to produce high-quality and accurately shaped custom molded parts. When you request an injection molding quote, we provide a variety of quality inspections and finishing options depending on your application’s needs.

  • Designing for Manufacturability Feedback (DFM): Our specialists give detailed comments on your design to make sure that your product is suitable for manufacturing without possible problems, which could slow down the process.
  • Scientific Molding Process Development Report: Our scientific molding reports cover the development process and guarantee that the mold will perform as intended and that the quality of the parts will not deteriorate over time.
  • In-Process CMM Inspection and Machine Monitoring: Our CMM checks and real-time monitoring of the machines ensure that the molding process is accurate and high-quality.
  • First Article Inspection (FAI) and Process Capability Report with GD&T: Our FAI and process capability reports, inclusive of GD&T, assure you that the first set of molded parts meets all the required standards and tolerances.

Wrapping Up

In conclusion, it’s economical and effective to get custom plastic molded parts made in China. China is a preferred destination for manufacturing high-quality plastic components because of its skilled workforce, competitive prices, and advanced manufacturing capabilities. Understanding the factors we have discussed and using the tips for collaboration, you can successfully apply the potential of custom plastic injection molding china industry to introduce new developments and high quality in your production.

FAQs

Q1. What is Plastic Injection Molding?

Injection molding is a manufacturing process that involves using injection to force molten material into a mold. The plastic cools and hardens into the intended shape; each round is known as a molding cycle or molding shot.

Q2. How Much Does Plastic Injection Molding Cost?

The cost of injection molding varies from $100 to over $ 100,000. The cost factors that are considered include the type of material used, size of the part, quantity ordered, complexity of the part, number of cavities, cycle time, and labor costs.

Q3. How Much Does Injection Molds Cost?

Injection Mold Cost varies depending on the complexity of the mold and the material used in its construction. Injection Mold costs are estimated to be between $1,000 and $100,000+ or even more. The cost of molds is also influenced by the complexity of the mold and its size, where simple and small molds are cheaper than complex and large molds with multiple cavities and features.

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Plastic Injection Molding Service

plastic injection mold

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 injection molding service

plastic molding services

Benefits of plastic injection molding service

The benefits of plastic injection molding service include:

  1. High volume production: Plastic injection molding is ideal for high volume production of identical parts, as the mold can be used multiple times.
  2. Consistent quality: The process is highly repeatable, which leads to consistent quality of parts produced.
  3. Complex shapes: Plastic injection molding can produce complex and intricate shapes that would be difficult or impossible to achieve with other manufacturing methods.
  4. Material flexibility: A wide variety of plastic materials can be used in the injection molding process, including thermoplastics, thermosets, and elastomers.
  5. 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.
  6. Precision: The process can produce parts with high dimensional accuracy and minimal tolerance variation.
  7. 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.Plastic Injection Molding Service

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

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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