Injection Molded Plastic Parts

Injection Molded Plastic Parts: High-Quality Parts, Guaranteed to Specification, Extended Warranty, Retain Mold Integrity, Advanced Design, Quality Assurance

Finding the right source for your injection molded plastic parts is as easy as selecting Our modern molding facility is located in Changping Town, Dongguan, China, an efficient plastic mold & molding company service custom injection mold and plastic molded parts to the world.

With SINCERE TECH, you are guaranteed professional quality assurance standards, the latest in technological equipment, and innovative, cost-efficient manufacturing techniques.

Injection Molded Plastic Parts: SINCERE TECCH’s Advantage

The injection molding process offers the lowest piece prices available, but tooling (plastic mold making) prices are generally the highest.  That is why we need to make all of the molds in-house to create top quality plastic mold and the lowest price for our customers.

SINCERETECH’s advanced design and engineering techniques produce the highest quality plastic injection molds available today.

And they stand behind their word. They offer their customers the option of joining their Extended Warranty Program guaranteeing the plastic mold we design and builds for you will retain its integrity throughout a specific number of cycles.

injection molded plastic parts

injection molded plastic parts

For more information, see the home page.

Injection Molded Plastic Parts: Applications

Injection molding is widely used for manufacturing a variety of parts, from the smallest component to entire body panels of cars. It is the most common method of production, with some commonly made items including bottle caps and outdoor furniture.

We have the ability to produce a wide variety of injection molded plastic parts and components, for industries of all types, including:

  • Connectors
  • Wire Shields
  • Vials
  • Cases
  • Switches
  • Housings
  • Face Plates
  • Toys
  • Bezels
  • Push Buttons
  • Knobs
  • Light Pipes
  • Shields
  • Computer Peripherals
  • Phone Parts
  • Gears
  • Typewriter Parts
  • Window Lift Parts
  • Fuse Blocks
  • Wedges
  • Trim Plates
  • DVD Brackets
  • Faucet Extrusions
  • A / C Vents
  • Gear Shift Knobs
  • Tail Lamp Sockets
  • Blood Testers
  • Boat Parts
  • Name Plates
  • Buckles
  • Bottle Ties
  • Component Boxes
  • Spools
  • Bobbins
  • Seat Belt Parts
  • Spacers
  • Lenses
  • Vents
  • Clips
  • Flower Pot Bases
  • Actuators
  • Radiator Tops
  • Junction
  • Boxes
  • Motor Housings
  • Key Fobs
  • Cosmetic Packaging

To provide the best process for your project, you are welcome to send us email, we will offer you the best solution for your project.

China plastic injection mold company

Plastic Mold China

Custom Plastic Injection Molding China

Custom Plastic Injection Molding China

Custom Plastic Injection Molding China

Custom plastic injection molding has emerged as a game-changer in the manufacturing industry, offering a versatile and efficient solution for producing high-quality plastic components. China, known for its robust manufacturing capabilities, has become a prominent destination for custom plastic injection molding. In this article, we will explore the process, benefits, and factors to consider when choosing a custom plastic injection molding company in China.

I. Introduction to Custom Plastic Injection Molding

Custom plastic injection molding in China involves the production of plastic parts tailored to specific designs and requirements. It is a widely utilized manufacturing process in which molten plastic is injected into a mold cavity, allowing it to cool and solidify to form a precise and customized plastic component. Here’s an introduction to custom plastic injection molding in China:

II. Overview of Plastic Injection Molding in China

Plastic injection molding is a widely used manufacturing process in China, and the country has become a global hub for injection molding due to its cost-effective production capabilities, advanced technology, and extensive experience. Here’s an overview of plastic injection molding in China:

1. Industry Landscape:

  • China has a well-established and highly competitive plastic injection molding industry. The sector includes a wide range of manufacturers, from small-scale facilities to large enterprises with advanced production capabilities.

2. Cost-Effectiveness:

  • One of the key advantages of choosing China for plastic injection molding is cost-effectiveness. The lower labor costs and efficient production processes contribute to competitive pricing, making it an attractive option for businesses seeking cost savings, especially for large production runs.

3. Technological Advancements:

  • Chinese injection molding companies often invest in state-of-the-art machinery and technologies. The industry has embraced automation, robotics, and Industry 4.0 principles to enhance efficiency, precision, and production capabilities.

4. Materials and Expertise:

  • China offers a diverse range of plastic materials for injection molding, catering to various industry requirements. Many Chinese manufacturers have accumulated significant expertise and experience in working with different types of plastics, including engineering plastics and specialty materials.

5. Customization and Prototyping:

  • Chinese injection molding companies provide services for customization and prototyping. This allows clients to iterate and refine their designs before moving into full-scale production, reducing the risk of errors and ensuring the final product meets specifications.

6. Quality Control:

  • Reputable Chinese injection molding companies adhere to international quality standards. They implement rigorous quality control processes to ensure that the manufactured products meet or exceed the specified requirements. Certifications such as ISO 9001 are common indicators of a commitment to quality.

7. Scalability:

  • China’s manufacturing sector is known for its scalability. Injection molding facilities can handle both small-scale prototype runs and large-scale mass production, providing flexibility to accommodate varying production needs.

8. Global Supply Chain Integration:

  • Chinese injection molding companies are integral parts of the global supply chain. They have well-established shipping networks and efficient transportation systems, facilitating the export of finished products to markets worldwide.

9. Sustainability Initiatives:

  • The Chinese injection molding industry is increasingly focusing on sustainability initiatives. This includes the adoption of eco-friendly practices, the use of recycled materials, and efforts to reduce the environmental impact of manufacturing processes.

10. Challenges and Considerations:

  • While China offers numerous advantages, businesses should be aware of potential challenges, including language barriers, intellectual property concerns, and variations in regulatory standards. Thorough due diligence and effective communication are crucial for successful collaborations.

In summary, China’s plastic injection molding industry is characterized by its cost-effectiveness, technological advancements, and the ability to cater to a wide range of manufacturing needs. As with any global manufacturing partnership, careful consideration of the chosen manufacturer’s capabilities, reputation, and adherence to quality standards is essential for a successful outcome.

III. Understanding the Process of Custom Plastic Injection Molding

Custom plastic injection molding is a versatile and widely used manufacturing process that allows for the production of complex and customized plastic components. Here’s an overview of the process:

1. Product Design:

  • The process starts with the design of the plastic product or component. Engineers create a 3D model using Computer-Aided Design (CAD) software. This design considers factors such as the intended function, structural requirements, and material selection.

2. Tooling Design:

  • Once the product design is finalized, the next step is the design of the mold or tool. This mold is a precise and detailed negative of the final part and is made from materials such as steel or aluminum. The mold design is critical to achieving the desired shape and features.

3. Tooling Manufacturing:

  • The mold is manufactured based on the tooling design. This involves precision machining and, in some cases, additional processes such as EDM (electrical discharge machining) for intricate features. The quality of the mold is crucial for the accuracy and consistency of the final product.

4. Material Selection:

  • The appropriate plastic resin is selected based on the product’s requirements. Factors such as strength, flexibility, heat resistance, and cost are considered. The chosen material is then loaded into the injection molding machine.

5. Injection Molding Machine Setup:

  • The injection molding machine is set up with the mold installed. The plastic resin is heated to a molten state and injected into the mold cavity under high pressure. The machine parameters, including temperature, pressure, and injection speed, are carefully controlled.

6. Injection Molding Process:

  • The molten plastic fills the mold cavity and takes its shape. The material then cools and solidifies within the mold. The cooling time is crucial to ensure the part solidifies completely and maintains its desired properties.

7. Cooling and Ejection:

  • The mold is equipped with cooling channels to expedite the cooling process. Once the plastic has solidified, the mold opens, and the newly formed part is ejected. The ejection system ensures the part is released without damage.

8. Quality Control:

  • The produced parts undergo quality control checks to ensure they meet the design specifications. This includes visual inspections, dimensional measurements, and other testing methods. Reputable manufacturers adhere to strict quality control standards.

9. Post-Processing (Optional):

  • Depending on the product requirements, post-processing steps may be performed. This can include trimming excess material, adding surface finishes, or assembling multiple components into a final product.

10. Packaging and Shipping: – The finished custom plastic parts are packaged according to client specifications. The manufacturer handles logistics, including packaging and shipping, to ensure the timely delivery of the products.

Benefits of Custom Plastic Injection Molding:

  • Versatility: The process allows for the production of complex and intricate designs.
  • Cost-Effective: Economical for large production runs.
  • Consistency: High repeatability and consistency in part production.
  • Material Variety: Can work with a wide range of plastic materials.
  • Efficiency: Rapid production cycles and short lead times.

It’s important for businesses to work closely with their chosen injection molding partner, providing clear design specifications and communication to ensure that the final product meets their expectations.

IV. Factors to Consider when Choosing a Custom Plastic Injection Molding Company in China

  1. Experience and Expertise: Look for a company with a proven track record in custom plastic injection molding. Experience brings expertise in handling complex projects and ensures quality results.
  2. Quality Assurance and Certification: Ensure that the company adheres to strict quality control standards and holds relevant certifications, such as ISO 9001, to guarantee the production of high-quality plastic components.
  3. Manufacturing Capabilities and Capacity: Evaluate the company’s manufacturing capabilities, including the range of materials they can work with and their production capacity to meet your project requirements.
  4. Cost and Pricing Considerations: China’s competitive pricing advantage is a significant factor to consider. However, ensure that the quoted price aligns with the quality and service you expect.
  5. Communication and Language Support: Effective communication is crucial for successful collaboration. Choose a company that offers clear communication channels and provides language support to bridge any language barriers.

V. Benefits of Choosing Custom Plastic Injection Molding in China

  1. Cost-effectiveness and Competitive Pricing: China’s manufacturing infrastructure and economies of scale allow for cost-effective production, enabling competitive pricing for custom plastic injection molding projects.
  2. Vast Manufacturing Infrastructure and Resources: China’s extensive network of suppliers and manufacturers ensures a seamless supply chain, providing access to a wide range of materials and resources.
  3. Skilled and Experienced Workforce: China boasts a skilled and experienced workforce, well-versed in the intricacies of custom plastic injection molding, guaranteeing top-notch quality and efficiency.
  4. Quick Turnaround Time and Efficient Production: China’s manufacturing prowess enables shorter lead times and efficient production, ensuring timely delivery of your plastic components.
  5. Ability to Handle Large Production Volumes: With its vast manufacturing capacity, China can handle large production volumes, making it an ideal choice for high-volume projects.

VI. Case Studies and Success Stories of Custom Plastic Injection Molding in China

Real-life examples of successful custom plastic injection molding projects in China highlight the industry’s capabilities and the positive outcomes achieved by partnering with reliable manufacturers. Testimonials from satisfied customers further validate the efficiency and quality of custom plastic injection molding in China.

VII. Tips for Successful Custom Plastic Injection Molding in China

  1. Effective Communication and Collaboration: Maintain open lines of communication with your chosen manufacturer, ensuring clarity and transparency throughout the project.
  2. Clear and Detailed Project Specifications: Provide comprehensive project specifications to avoid misunderstandings and ensure that the final product meets your requirements.
  3. Regular Quality Control and Inspection: Implement a robust quality control process to ensure that the manufactured components meet the required standards and specifications.
  4. Continuous Improvement and Innovation: Encourage your manufacturing partner to embrace innovation and continuous improvement, enhancing the quality and efficiency of the injection molding process.


Custom plastic injection molding in China offers a cost-effective and efficient solution for manufacturing high-quality plastic components. With its vast manufacturing infrastructure, skilled workforce, and competitive pricing, China has emerged as a leading destination for custom plastic injection molding projects. By considering the factors discussed and following the tips for successful collaboration, you can leverage the benefits of custom plastic injection molding in China to revolutionize your manufacturing solutions.

SINCERE TECH ( is one of the professional Custom Plastic Injection Molding China companies in China, in providing high-quality custom Plastic Injection Molding or custom plastic mold for varies industries since 2005. Our major clients are well-known manufacturers from automotive industries, Household appliance, Consumer Electronics, Communications, food package Products and medical industries from American, Europe, Japan, and Mainland. SINCERE TECH offers the best services in making custom injection molds and molding service to all of our customers.

To meet our customer’s requirements, we have employed a professional team with more than a hundred professionals specializing in engineering, tooling, manufacturing and quality assurance. This team of experts is committed to delivering the highest quality molds/products and superior personal attention every customer expects and deserves.

Beyond our profession product design, moldmaking and injection molding service team, millions of dollars of modern plastic injection machinery, CAD-CAM and equipment invested. Base on the above advantages, we are dedicated to becoming your product design, prototypes, mold making and injection partner with superior quality, shortest lead-time, cost-effective and reliable product.

Through developing and accumulating, we have mastered the whole set of integrated skill process of 3D model, tooling separation, programming, and plastic mold and molding manufacturing, with the machines as following:

We can afford to provide excellent integrated service by the software and hardware of our company.
Series of mould we developed in recent years:

Household electric product series;Custom Plastic Mold
Food package products;
Medical equipment series;
Drinking machine series;
Security and protection equipment series;
Electric product series;
Audio and video series;
Computer peripheral product series;
Gift series;

We are good at designing the bi-colored moulds (two-shot mold). multiple cavity molds, thin all mold, gas-assist injection molding, insert molding and plug additional moulds, etc, which we developed are broadly approbated and very popular with our clients.

With United cooperation and absorbed plastic injection mold industry, we have been concentrating on development, even to be the lead manufacturer in the field of mould and plastic. We hope sincerely the mutual benefit cooperation can be available between us, basing on our principle of CLIENTS’ SATISFACTORY IS WHAT WE PROMISE.

SINCERE TECH Custom Plastic Injection Molding China company welcomes you to visit our mold manufacturer China Factory. To learn our professional custom plastic Injection Molders Design, to get the best and competitive plastic injection molds and moldings.

SINCERE TECH Injection Mold China Company

May 4th this year marked a milestone in the history of SINCERE TECH injection mold China company as it celebrated 15 years of service to the plastic molds & thermoplastics industry.

” It is a great result for any company to reach this milestone and it is a clear endorsement of the quality products, and people that have performed so well for our customers over the years said general manager Steve Yang.

“Innovation, creativity, service and people are the keys to ensuring customers continue to want to work with a company like SINCERE TECH and will allow us to see out another 15 plus years in China, American, and European markets.”

Innovation that drives the industry

Based at the GongGuan City of China facility, SINCERE TECH injection mold China company has been the industry leader in the introduction of new and innovative resins that have made possible many of the applications that today we take for granted.

With such leadership comes the expectation of a need to constantly improve, and the recent global focus on the ever-expanding SINCERE TECH product portfolio has delivered some outstanding results in terms of the performance of the newly developed grades.

Recent additions to the product portfolio include grades such as high gloss parts that provide superior high quality and excellent chemical and mechanical performance and Xylex which provides superior chemical resistance and flow performance to a traditional PC.

With the recent acquisition by SINCERE TECH, the combined product offering of these two organizations will be second to none in the industry. Taking into account the backing of the global SINCERE TECH resources, SINCERE TECH mold manufacturer China will continue to deliver innovative products to the market to enable its customers to push the envelope with new and more competitive applications.

Steve Yang said ” As the professional mold manufacturer China and injection molding company, it is our role to continually bring creative and innovative materials to the market place to ensure the continued growth of our customers. In the current difficult the economic climate, more than ever, the responsibility for this lies with strong companies such as SINCERE TECH, and we look forward to taking on this challenge.”

Creative solutions to meet customers’ needs.

In combination with a strong portfolio of products, SINCERE TECH is also in providing creative solutions to meet the diverse and changing needs of its customers. In response to the increasing importance of aesthetics to gain an edge in the market place, SINCERE TECH has expanded its Visual fx range of effects that allow designers to incorporate a wide range of effects that provide differentiation as well as the ability to eliminate secondary operations resulting in reduced system costs and design freedom limited only by the creativity of the designer.

SINCERE TECH was also A plastic mold company in China to offer Internet ordering to its customers and thus move the Internet from just another desktop application to a useful and powerful business tool for its customers. Combined with powerful design tools and technical support, the web site is fast becoming the one-stop, one source, one site, for everything plastic.

World-class service and people.

Meeting customer’s needs has always been the key focus of SINCERE TECH operations, and with 15 years of commitment to the overseas industry, we provide fluent English & Technical communication,  the company continues to invest in the necessary systems to ensure this focus is as relevant to today’s industry needs.

“I would personally like to thank every employee who has contributed over the last 15 years into building our business into what it is today. I would also like to thank our customers for their continued support and look forward to providing innovative, quality products and service that helps them grow and become more successful for the next 15 years and beyond”

mold manufacturer china company

Mold Manufacturer China Company

Brief overview of mold manufacturing in China

Mold manufacturing in China has become a significant industry, playing a crucial role in supporting various sectors such as automotive, electronics, consumer goods, and more. Here’s a brief overview of mold manufacturing in China:

  1. Industry Growth: China has experienced substantial growth in its mold manufacturing industry over the past few decades. The country has become one of the world’s leading mold producers, supplying plastic mold to both domestic and international markets.
  2. Diverse Applications: Mold manufacturing in China covers a wide range of applications, including plastic injection molds, die-casting molds, stamping dies, and more. These molds are used for producing components and parts across various industries.
  3. Technological Advancements: Chinese mold manufacturers have made significant investments in technology and equipment to enhance precision and efficiency. Advanced CAD/CAM (Computer-Aided Design/Computer-Aided Manufacturing) technologies are commonly employed in the design and production processes.
  4. Cost Competitiveness: One of the key reasons for the growth of mold manufacturing in China is its cost competitiveness. Chinese manufacturers often offer lower production costs compared to many Western counterparts, making it an attractive option for companies looking to optimize expenses.
  5. Skilled Workforce: China has a large pool of skilled engineers, technicians, and workers with expertise in mold design and manufacturing. This skilled workforce contributes to the country’s ability to produce high-quality molds.
  6. Quality Standards: Over the years, Chinese mold manufacturers have improved their adherence to international quality standards. Many companies have obtained certifications like ISO 9001 to demonstrate their commitment to producing molds of high quality.
  7. Global Exporter: China serves as a major exporter of molds to countries worldwide. Many international companies source their molds from Chinese manufacturers due to the cost advantages and the ability to handle large production volumes.
  8. Challenges: Despite its success, the industry faces challenges such as concerns about intellectual property protection, inconsistent quality among manufacturers, and the need for ongoing improvements in technology and skills.
  9. Government Support: The Chinese government has supported the mold manufacturing industry through policies that encourage innovation, research and development, and international collaboration. This support has played a role in the industry’s continuous growth.

In conclusion, mold manufacturing in China has evolved into a robust and competitive sector, driven by technological advancements, a skilled workforce, and cost advantages. Companies looking for cost-effective and high-quality mold solutions often turn to China as a key manufacturing hub.

Factors to Consider when Selecting a Mold Manufacturer in China

Selecting the right mold manufacturer in China is crucial for ensuring the success of your production processes. Here are key factors to consider when making this decision:

  1. Experience and Expertise: Evaluate the manufacturer’s experience in mold making and their expertise in the specific type of mold you require (e.g., plastic injection molds, die-casting molds). A manufacturer with a proven track record is more likely to deliver quality results.
  2. Reputation and References: Look for reviews, testimonials, and references from other clients who have worked with the mold manufacturer. A positive reputation is indicative of reliability and quality. Industry certifications, such as ISO 9001, also provide insight into the manufacturer’s commitment to quality.
  3. Facility and Technology: Assess the manufacturing facility’s capabilities, technology, and equipment. State-of-the-art machinery and advanced technologies, such as computer-aided design (CAD) and computer-aided manufacturing (CAM), contribute to precision and efficiency in mold production.
  4. Quality Control Measures: Inquire about the manufacturer’s quality control processes. A reliable manufacturer should have strict quality control measures in place at various stages of the mold manufacturing process. This ensures that the final product meets your specifications and standards.
  5. Communication and Project Management: Effective communication is essential for successful collaboration. Evaluate the manufacturer’s communication channels and project management processes. Clear communication helps prevent misunderstandings and ensures that your requirements are met accurately and on time.
  6. Costs and Quotations: While cost is a significant factor, it should not be the sole consideration. Obtain detailed quotations that break down costs and provide transparency. Consider the overall value, including quality, reliability, and delivery timelines, in addition to the price.
  7. Intellectual Property Protection: Assess the manufacturer’s commitment to intellectual property protection. Ensure that they have mechanisms in place to safeguard your designs and proprietary information. This is particularly important when dealing with sensitive or innovative products.
  8. Capacity and Scalability: Evaluate the manufacturer’s production capacity and scalability. Ensure that they can handle your current production needs and have the capability to scale up if your requirements increase in the future.
  9. Location and Logistics: Consider the location of the manufacturer in relation to your business. Proximity can affect shipping costs, lead times, and ease of communication. Evaluate the logistics infrastructure and transportation options for efficient delivery.
  10. Flexibility and Customization: Assess the manufacturer’s flexibility in accommodating customization requests. A manufacturer that can adapt to your specific requirements and provide customized solutions is valuable for meeting unique project needs.
  11. Compliance with Regulations: Verify that the manufacturer complies with relevant industry standards and regulations. This is crucial for ensuring that your products meet quality and safety requirements, especially if you are manufacturing components for regulated industries.

By carefully considering these factors, you can make an informed decision when selecting a mold manufacturer in China, leading to a successful and productive partnership.

Communication and Project Management

Effective communication and project management are critical components of a successful collaboration with a mold manufacturer in China. Here are key considerations for both aspects:


  1. Language Proficiency: Ensure that there is clear and effective communication by confirming that the manufacturer’s team is proficient in the language you use for business communication. This could be English or another language commonly used in international business.
  2. Dedicated Contact Person: Establish a dedicated contact person or project manager on both sides to facilitate communication. This individual should be well-versed in the technical aspects of mold manufacturing and capable of addressing any concerns or questions.
  3. Communication Channels: Identify and agree upon the preferred communication channels. This may include email, phone calls, video conferences, or project management tools. Regular updates and progress reports should be scheduled to keep all stakeholders informed.
  4. Cultural Understanding: Be mindful of cultural differences and norms. Understanding the cultural context can help prevent misunderstandings and foster a positive working relationship. Establish open lines of communication to address cultural nuances that may impact the collaboration.
  5. Documented Communication: Document important communications, decisions, and agreements. This helps in creating a record of discussions and ensures that everyone involved is on the same page. Written documentation can also serve as a reference in case of any disputes or misunderstandings.
  6. Feedback Mechanism: Set up a feedback mechanism for both parties to provide input on the collaboration. This can include regular feedback sessions, surveys, or other means to assess the effectiveness of communication and address any issues promptly.

Project Management:

  1. Detailed Project Plan: Develop a detailed project plan that outlines key milestones, deadlines, and deliverables. This plan should be agreed upon by both parties and serve as a roadmap for the entire project.
  2. Risk Assessment: Conduct a comprehensive risk assessment at the beginning of the project to identify potential challenges. Develop mitigation strategies for identified risks to minimize their impact on the project timeline and quality.
  3. Regular Progress Updates: Schedule regular progress updates to review the status of the project. These updates should include information on completed tasks, ongoing work, and any issues that may require attention. Transparency is crucial for effective project management.
  4. Change Management Protocols: Establish protocols for handling changes to the project scope or specifications. Clearly define how changes will be communicated, evaluated, and implemented. This helps prevent scope creep and ensures that changes are managed efficiently.
  5. Quality Control Checkpoints: Integrate quality control checkpoints into the project timeline. These checkpoints should include inspections and tests to verify that the molds meet the specified quality standards. Addressing quality issues early in the process can prevent costly rework later.
  6. Flexibility and Adaptability: Recognize that unforeseen circumstances may arise during the project. Both parties should be flexible and adaptable, willing to adjust timelines or strategies if necessary. A collaborative and problem-solving approach is beneficial.
  7. Contingency Planning: Develop contingency plans for potential disruptions such as supply chain issues, equipment failures, or other external factors. Having contingency plans in place ensures that the project can continue even in the face of unexpected challenges.
  8. Post-Project Evaluation: Conduct a thorough evaluation of the project upon completion. This includes assessing the overall success, identifying areas for improvement, and gathering feedback from all stakeholders. Use the insights gained to enhance future collaborations.

By prioritizing effective communication and robust project management practices, you can foster a collaborative and successful partnership with a mold manufacturer in China. Clear communication and well-managed projects contribute to the timely delivery of high-quality molds that meet your specifications.

We are a China Mold Maker that has full services in plastic injection molds and injection molding services.

Our familiarity with diverse plastics, from ABS, PP, PMMA, PC, PA66, PA66+GF, PPA, PPS, PPSU, POM, PS, HDPE, and so on, allows us to serve the automotive, biomedical, telecommunications, and consumer industries.

At SINCERE TECH, our array of equipment includes machines ranging from 60 tons to 2000 tons and can handle shot sizes as small as 0.05 gram and as large as 12kg. That represents a lot of flexibility with regard to part size.

Short, medium, or long injection molding runs, we provide whatever it takes to assist you in getting get your product to market.

We can provide you with any required secondary operations such as ultrasonic welding, drilling, tapping, finishing, assembly, and even packaging.

Whether your need is for millions of plastic injection molded parts, or just a few hundred, SINCERE TECH is the right China plastic injection molding company for your plastic injection molding needs and for building your injection molds!

We are big enough for large volume plastic injection molding production, yet small enough for personal service.

Plastic Injection Molding Tooling and Fixturingmold manufacturer in China

We can assist you in determining what kind of plastic injection mold tooling and fixturing you will need and design and build your injection molds and any other tooling or fixturing that may be required for your project,  including prototypes.

As a plastic mold maker, we know that you can only get superior parts from superior tooling. As a plastic injection mold maker, we pride ourselves in the art of injection mold making. Since we will probably have to use the injection molds we build, we build them right, and we maintain your injection molds to the highest of standards, and if you need a large volume of injection molded parts, we could 30% of mold cost in your mold making, this will reduce your invert for plastic molds making

All Types of Plastic Injection Molding Materials

As a professional mold manufacturer China company, we are experienced at injection molding with all types of plastic resins including engineering resins and CPVC. We can provide you with help in choosing the right resin for your injection molding project. Our plastic injection molding experience includes everything from plastic video cassette cases to medical plastic parts used in surgery and other medical applications.

Plastic Injection Molding Secondary Operations

We can provide any and all finishing and secondary operations such as drilling, tapping and ultrasonic welding, as well as assembly and packaging for your plastic injection molded parts. Whatever it takes to make your product a success we can handle it.

Plastic Injection Molded Prototyping

Our modern fully equipped tool and die shop can construct plastic prototypes for your evaluation.

Plastic Injection mold modification

If you need to make a sudden change, no problem. Our expert staff can get right on it.

With our in-house plastic mold and die facilities we are able to perform all needed tooling maintenance, assuring you of the most trouble-free operations possible.

If repairs or reconditioning are required we can provide an extremely quick turn around times.

SINCERE TECH works with you to determine the best solution to your molding needs.

mold manufacturer chinaIn many cases, the tooling costs can be greatly reduced through the use of secondary operations to the Plastic injection molded parts such as drilling, tapping, etc.

We will work with you to find the best, most effective, and cost-efficient solution for your tooling needs.

If you are looking for plastic injection molded parts of the highest quality at reasonable prices, let us quote your plastic injection molding project!

If it can be injection molded, we can mold it!

Our modern fully equipped mold manufacturer in China  and plastic injection molding facilities are located in the Dongguan City of China.

Please explore our site and e-mail us if you have any questions, or send us your requirement for a quotation, we’ll be glad to discuss your plastic molds and molding needs.

Injection Molding Nylon

Thermoplastic Injection Molding Process

What is Thermoplastic Injection Molding

Thermoplastic injection molding is a widely used manufacturing process for producing plastic components in large volumes with high precision. This technique involves injecting molten thermoplastic material into a mold cavity, allowing it to cool and solidify, ultimately forming the desired shape. The process is commonly employed to manufacture a diverse range of plastic products, from intricate components to everyday items.

Thermoplastic injection molding Process is the best method that most widely used of all plastics processing. Once formed, thermoplastics can be heated, reformed and recycled over and over again, reducing waste and saving on material costs. The Thermoplastic injection molding process is now become very popular and often used by many manufacturers.

Thermoplastic injection molding is a high quality of molding key that mainly used by many successful manufactures. This moulding process provides the lowest piece prices available. A high-value injection mold is essential to a project’s successful completion. Using thermoplastic injection moulding can bring your manufactures successfully.

The primary process for manufacturing custom plastic parts and components is thermoplastic injection molding. Although custom plastic moulding differs from one product manufacturer to another, the principle of applying heat and pressure to form plastic parts or components is a method that is synonymous across the mold making industry.

The advantages of Thermoplastic Injection Molding process

Thermoplastic Injection Molding offers a multitude of advantages that make it a preferred manufacturing process in various industries. Here are some key advantages:

  1. High Precision and Complexity:
    • Injection molding allows for the production of intricate and highly detailed parts with tight tolerances. This precision is crucial in industries where product functionality and performance are paramount.
  2. Efficient Mass Production:
    • Well-suited for high-volume production, thermoplastic injection molding enables the rapid and consistent manufacturing of large quantities of identical parts. The cycle times are relatively short, contributing to increased efficiency and lower production costs per unit.
  3. Material Versatility:
    • A wide range of thermoplastic materials can be used in the injection molding process, including commodity plastics like polyethylene and polypropylene, as well as engineering-grade plastics such as ABS, polycarbonate, and nylon. This versatility allows for the selection of materials tailored to specific product requirements.
  4. Cost-Effective for Large Runs:
    • While initial tooling and plastic mold setup costs can be significant, the per-unit cost decreases with higher production volumes. This cost efficiency makes injection molding economically viable for large-scale manufacturing.
  5. Reduced Post-Processing Requirements:
    • The molded parts often require minimal post-processing, as the mold itself imparts a finished and detailed surface to the product. This reduces the need for additional finishing steps, saving time and costs.
  6. High-Quality Surface Finish:
    • Injection molding can produce parts with a smooth and high-quality surface finish directly from the mold. This is advantageous for applications where aesthetics or a polished appearance are crucial.
  7. Fast Cycle Times:
    • The cycle times in injection molding are relatively short, enabling rapid production rates. This is particularly advantageous for meeting tight production schedules and quick turnaround times.
  8. Consistency and Reproducibility:
    • The automated nature of the injection molding process ensures a high level of consistency and reproducibility in part production. This is essential for maintaining product quality across large production runs.
  9. Design Flexibility:
    • The flexibility of injection molding allows for the incorporation of complex shapes, undercuts, and intricate features in the design. This design freedom is valuable for creating innovative and functional products.
  10. Waste Reduction:
    • Efficient use of material and the ability to recycle excess material contribute to reduced waste in the injection molding process, aligning with sustainable manufacturing practices.

In summary, thermoplastic injection molding stands out for its ability to produce high-quality, complex parts at scale with cost-efficiency. The advantages extend to design flexibility, material versatility, and the capability to meet the demands of various industries. As technology and materials continue to advance, injection molding remains a cornerstone of modern manufacturing.

Steps in the Thermoplastic Injection Molding ProcessThermoplastic Injection Molding

The thermoplastic injection molding process involves several precise steps to transform raw thermoplastic material into a final, molded product. Here is a detailed breakdown of the key steps:

  1. Mold Design and Fabrication:
    • The process begins with the design of the mold, also known as the tool or die, based on the specifications of the desired product.
    • The mold is typically made of durable materials like steel or aluminum to withstand the high pressures and temperatures of the molding process.
  2. Mold Preparation:
    • The mold is prepared for the injection molding process. This includes cleaning, inspecting, and applying any necessary surface treatments or coatings to enhance mold release.
  3. Clamping:
    • The mold is securely clamped shut within the injection molding machine. This step is crucial to prevent any material leakage during injection and to withstand the high pressure applied during the process.
  4. Injection:
    • The thermoplastic material, typically in the form of small pellets or granules, is fed into the injection molding machine’s hopper.
    • The material is heated and melted within the machine’s barrel, forming a viscous molten resin.
    • The injection unit then injects the molten plastic under high pressure into the mold cavity. The pressure ensures that the material fills the mold completely.
  5. Cooling:
    • Once the mold cavity is filled, the molten plastic is allowed to cool and solidify. The cooling process is crucial for achieving the desired shape and structural integrity of the final product.
    • Cooling can be controlled through the circulation of coolants within the mold or by other cooling methods.
  6. Mold Opening:
    • After the plastic has sufficiently cooled and solidified, the mold opens. This step exposes the newly formed plastic part.
  7. Ejection:
    • The ejector pins or mechanisms within the mold are activated to push the molded part out of the mold cavity.
    • The part is then released from the mold and collected for further processing or quality control.
  8. Post-Processing (Optional):
    • Depending on the application and product requirements, there may be additional post-processing steps such as trimming excess material, surface finishing, or assembly.
  9. Quality Control:
    • The molded parts undergo quality control checks to ensure they meet the specified design criteria. This may involve dimensional inspections, visual inspections, and other testing methods.
  10. Repeating the Process:
    • The entire cycle is then repeated for subsequent production runs. The mold can be used repeatedly to create identical parts, making the process efficient for large-scale manufacturing.

The success of the thermoplastic injection molding process relies on precision, control of parameters, and attention to detail at each stage. This systematic approach ensures the production of high-quality plastic components consistently.

Applications of Thermoplastic Injection Molding:

Thermoplastic injection molding is a versatile manufacturing process widely used across various industries to produce a diverse range of products. The adaptability and efficiency of this method make it suitable for applications in:

  1. Automotive Industry:
    • Thermoplastic injection molding is extensively employed in the automotive sector for manufacturing interior and exterior components. This includes dashboard panels, door handles, bumpers, trim pieces, and various other plastic parts that contribute to the overall aesthetics and functionality of vehicles.
  2. Consumer Goods:
    • The consumer goods industry relies on injection molding for producing a multitude of products. Examples include plastic containers, household appliances, toys, kitchenware, and electronic enclosures. The process allows for cost-effective production of high-quality, complex shapes with consistent quality.
  3. Medical Devices:
    • In the medical field, thermoplastic injection molding is utilized to manufacture a wide range of devices and components. This includes syringes, IV connectors, medical tubing, surgical instruments, and various plastic enclosures for diagnostic equipment. The precision and repeatability of the process are critical in the medical sector.
  4. Electronics:
    • Electronic components often require intricate and precisely molded plastic parts. Thermoplastic injection molding is employed for producing casings, connectors, switches, and various other components used in electronic devices. The process ensures the necessary precision and consistency demanded by the electronics industry.
  5. Packaging Industry:
    • Thermoplastic injection molding is used to create packaging solutions for food, beverages, cosmetics, and other consumer products. This includes containers, caps, closures, and packaging inserts. The ability to mass-produce these items with high precision is vital for the packaging industry.
  6. Industrial Components:
    • Many industrial applications benefit from the strength and durability of thermoplastic injection-molded components. This includes gears, housings, brackets, and various parts used in machinery and equipment across different industrial sectors.
  7. Aerospace:
    • In the aerospace industry, thermoplastic injection molding is employed for manufacturing lightweight and durable components. This includes interior components, ventilation ducts, brackets, and other parts where high strength and precision are essential.
  8. Construction:
    • Construction applications involve the use of injection-molded plastic components for various purposes. This includes fittings, connectors, panels, and other construction elements where lightweight, durable, and cost-effective materials are desired.
  9. Sporting Goods:
    • Thermoplastic injection molding is used to produce a wide range of sporting goods, including helmet shells, protective gear, handles, and other components. The process allows for the creation of lightweight yet robust products.
  10. Custom and Specialized Products:
    • The versatility of thermoplastic injection molding makes it suitable for producing custom and specialized products across different industries. This could include unique consumer products, industrial prototypes, and components designed for specific applications.

The widespread use of thermoplastic injection molding across these diverse industries highlights its significance as a go-to manufacturing process for creating high-quality, precision-engineered plastic components. The process continues to play a crucial role in shaping various products that are integral to our daily lives and industrial processes.


Known as a versatile and economical material, plastic can be used in a variety of applications. Of all the available plastic processing methods, thermoplastic injection molding is the most widely used among the broadest spectrum of markets. You can find that many manufacturers nowadays use this kind of the plastic molding process.

Thermoplastics come in a wide range of plastic materials, including polystyrene, acetal, polyurethane, nylon, polyethylene, polyester, polypropylene, ABS and polycarbonate. By using thermoplastic injection molding, manufacturers can produce a wide variety of products. You can use all the designs to make the best quality products that can be used in many areas.Mold Manufacturer China

There are many reasons why it is important for you to use this thermoplastic injection molding. These reasons will make you sure in using this plastic molding process.

The first reason is that large quantities of thermoplastics are cheaper to produce than steel & stainless steel.

The second reason is because of thermoplastics’ lightweight cars manufactured with them is more fuel efficient as well as light-weight and the last is thermoplastics are corrosion-resistant and can withstand extreme temperatures. So there is no doubt in using this plastic molding process.

Using the range of thermoplastics can meet your specific injection-molded plastic product manufacturing requirements, from the simple to the complex shape, detail and tolerance. Combined with an extensive array of in-house thermoplastic injection molding presses and peripheral molding systems is your one-stop source for your entire thermoplastic component manufacturing needs.

Manufacturers that use thermoplastic injection molding can produce thermoplastic parts in a wide range of materials to meet your specific needs. It will give your manufacture a big chance to be successful manufactures that produces a wide variety of products of thermoplastics. Having produced small, medium and large production runs of thousands of different products can manufacture virtually any injection-moulded plastic component.

We are A China mold maker, we provide plastic injection molds for thermoplastic injection molding parts, if you have any in need this service, please send us your requirement for quotation, we will quote you in 24 hours. You will have the best price and service.


Recycled Plastic Injection Molding

Plastic injection mold Process for Plastic parts

Glass Filled Nylon Injection Molding

Injection Molded Parts

Injection molded parts

Injection molded parts

What is injection molded parts for?

Injection Molded Parts is plastic parts that are produced through plastic injection molding. It is known that plastic is known to be a very versatile and economical material that is used in many applications. Your computer monitor, mouse and keyboard are the examples of Injection Molded Parts.

Injection molded Parts is created by using an injection molding machine, which works by melting plastic pellets, and injecting them into a mold. Related to the case, designing plastic parts is a complex process, and the manufacturing end of it must be taken into account during the design phase. There are three elements of an injection molded plastic part; the nominal wall, projections, and holes and recesses.

The nominal wall as the first element of injection molded plastics refers to the wall thickness. The wall thickness throughout the part should not vary by more than 10 percent. Varying wall thicknesses in the injection molded plastic parts is one of the main causes of flawed product.

How to design injection molded parts

In designing injection molded parts, people usually avoid excessively thick walls, simply because thick walls use more plastic, and are more expensive to produce. However, there is a limit as to how thin the part can be as well. The strength of the part is a function of the thickness, and the final use of the product will determine the desired strength. Some specialized injection molded plastic parts require reinforcement with glass or carbon fibers.

A projection is another element of injection molded parts that projects out of the nominal wall, such as reinforcement ribs. The ribs must not be thicker than the nominal wall, or else sink marks may result.

Recesses and holes are also a major design element of plastic molding parts. The location of any holes or recesses may significantly affect the part’s overall strength. Trying to create a hole in the side of a part is especially challenging, and the need for side holes should be minimized in the initial design.

plastic molding parts

plastic molding parts

If you need plastic molding parts design or plastic mold making, welcome to contact us, we are mold manufacturer China that offer one top service for plastic injection mold molding service

Besides the three elements of injection molded parts mentioned above, another design factor is the corners of the part. How the plastic enters and fills the mold is of great concern. Because melted plastic is a fluid, fluid dynamics will dictate the design as well, to a large extent.

In this case, the plastic molding parts will flow better during injection if corners are rounded. In the other hand, the plastics will pull against a sharp corner during the cooling process, and a flawed part may result. To result in a stronger part that is less likely to crack or break, creating a low stress design with smooth transitions is a must.

There are two types of materials used in injection molded parts: thermoplastics and thermoset plastics. No matter what type of material is used, it is generally supplied in a granular or powdered format. Leftover and scrap materials from thermoplastics can be recycled, while those from thermoset plastics cannot, due to their chemical transformation during the mixing and curing process.

Types of thermoplastic materials used for plastic molding parts include: polystyrene, acrylonitrile butadiene styrene (ABS), polyimide, polypropylene, polyeththylene, and polyvinyl Chloride (PVC). Meanwhile, thermoset plastics consist of two or more base materials that are mixed together and then the mixture undergoes a chemical reaction to create a new material. Types of thermoset plastics used in injection molding include epoxy and phenolic.

mold manufacturer china

mold manufacturer china

Injection molding allows manufacturers to produce quality plastic components repeatably in a cost-efficient manner. As a result, injection molded parts are used in nearly every industry, from toys to automobile components.

Today during The fierce of market competition, most of buy are looking for mould suppliers in china companies to produce their plastic molds and plastic molding parts.

Sincere Tech is a plastic mold company that specializes in providing injection molded parts service for its clients. With its expertise in producing high-quality parts, the company has become a reliable partner for businesses in various industries.

The injection molding process involves the use of a mold to create parts from different materials such as plastics, rubber, and metals. Sincere Tech has a team of highly skilled engineers and technicians who work with clients to design and produce custom parts that meet their specific needs.

The company uses state-of-the-art equipment and technology to ensure that its injection molded parts are of the highest quality. It also provides a range of services, including prototyping, mold design, and mold making, to ensure that clients get the best results.

Sincere Tech is committed to providing its clients with exceptional service and products. Its team of experts works closely with clients to ensure that their specifications are met, while also providing valuable insight and guidance throughout the entire process.

Overall, Sincere Tech’s injection molded parts service is an excellent option for businesses in need of high-quality parts for various applications. With its expertise and technology, the company is capable of meeting the diverse needs of its clients and delivering outstanding results.

If you are looking for Injection mold China partner to increase your market competitive power, you are welcome to call us or send us and email, we are full equipment service in providing plastic mold and injection molded parts.

Sincere Tech, we are one of the top 10 best leading plastic mold companies in China. We offer wide range of custom plastic injection molds, die casting molds, metal parts, CNC machining and mold components. Through ongoing investments in research and development, we deliver cutting-edge solutions that address the evolving needs of our customers. As one of the best injection mold suppliers in China, we pride ourselves on our commitment to excellence.

Quality is of the most importance to us, to make sure we make high quality molds, we will use CMM measuring machine to measure all of mold components, electrodes, and all of final molding parts, to make sure all of dimensions are under the tolerance, We will test the function of parts, materials to make sure that the final part will meet your requirements.

When you partner with Sincere Tech as your preferred China mold maker, you can expect the highest level of professionalism, expertise, and innovation. We are dedicated to helping you bring your ideas to life, delivering superior products that excel in performance, durability, and cost-effectiveness.

Our expanded capabilities include:

  1. Rapid Prototyping: We offer rapid prototyping services (3D printing or CNC machining prototypes) to quickly transform your rough design into useable prototypes, and testing, redesign suggestion etc.
  2. Precision CNC machining: Our advanced CNC machines enable us to create high-quality mold components with tight tolerances, this will ensure currently tolerance and precision in the injection-molded products.
  3. Overmolding: We make overmolding for some handle tools, some of overmoling are used in the die casting molds as well, contact for quote for your overmolding project.
  4. Insert Molding: insert molding is similar to overmolding but will be little different, insert molding normally use metal parts as substrate and overmolding use plastic part as substrate.
  5. Two-Shot Molding: With two-shot molding, we can produce complex, multi-material components in a single operation, reducing assembly requirements and enhancing design possibilities. Two shot molding is more complex than insert molding or overmolding, and two shot molding requires two shot injection molding machine.
  6. Value-Added Services: In addition to injection molding, die casting, and machining, we offer a range of value-added services, including product silk-screen, painting, assembly, testing, certificate, packaging, and logistics support, streamlining your supply chain and reducing costs.

Partner with Sincere Tech China mold maker for your custom injection molding, die casting and machining needs, we will offer you the best quality and fast lead time, contact us for quote in 24 hours.