Custom plastic Injection Molding Service

Quickly move from plastic prototyping to high quality custom production parts. Small batch and mass production plastic injection molding services are available.

  • Thermoplastic
  • Thermoset Silicone
  • 0.05mm mold tolerance
Plastic Injection Molding Service

Our Custom Injection Molding Services

Our custom injection molding service is dedicated to providing you with comprehensive and detailed plastic parts solutions. From product design, mold development to mass production, we cover the whole process of injection molding to ensure that every link can meet your individual needs

Injection Mold Tooling

Injection Mold Tooling

The precision tool of plastic injection molding process, which is the key equipment for mass production of plastic parts

Plastic Injection Molding

Plastic Injection Molding

The process by which thermoplastic particles are heated to a molten state and then injected into a mold cavity by means of pressure, where the plastic cools and solidifies to form a plastic product of the desired shape



Overmolding combines different plastic materials by molding one over another, enhancing functionality, aesthetics, and grip, while reducing assembly time and costs. 

Insert Molding

Insert Molding

Insert molding encases a pre-set insert with plastic, merging metal and plastic, enhancing strength, simplifying assembly, and ensuring precision integration.

plastic injection molding Materials

Wide range type of industrial-grade materials can be used for custom Injection Molding parts, giving you lots of material selection options to complete prototypes and production runs of custom parts. If any kind of special material is not available in our local market, sending through your own material is another option.

Injection Mold Tooling Materials

Before injection molding process starts low or high-volume production, a high tolerance CNC machined tooling is needed. Most commonly used materials include:

Tool Steel: P20, H13, S7, NAK80, S136, S136H, 718, 718H,  738

Stainless Steel:420, NAK80, S136, 316L, 316, 301, 303, 304

Aluminum: 6061, 5052, 7075

Plastic Injection Molding

Plastic injection molding service comes with a wide range of materials with different properties, including impact strength, rigidity, thermal resistance, chemical resistance, etc.


PPA   PS        POM      PC

PU     Teflon (PTFE)   Nylon

PC     PMMA   PA        PEEK



Several thermoset materials for distinct applications due to their unique bonding properties.

Liquid Silicone RubberEpoxy

Injection Mold Surface Finishes

We offer SPI finishes and VDI textures primarily for plastic injection molds, please specify your requirements when submitting your quote.

SPI Finish StandardsSurface Roughness
RA (mm)
Finishing MethodTextureSteels Recommended
A10.012 to 0.0256000 Grit DiamondSuper High Glossy finishS136 (54 HRC) or
8407(52 HRC)
A20.012 to 0.0253000 Grit DiamondSuper High Glossy finishS136 (54 HRC) or
8407(52 HRC)
A30.05 to 0.101200 Grit DiamondNormal Glossy finishS136 (300 HB) or
718 H
B10.05 to 0.10600 Grit PaperFine Semi-glossy finish718 H
B20.10 to 0.15400 Grit PaperMedium Semi-glossy finish718 H
B30.28 to 0.32400 Grit PaperNormal Semi-glossy finish718 H
C10.35 to 0.40600 Grit StoneFine Matte finish718 H
C20.45 to 0.55400 Grit StoneMedium Matte finish718 H
C30.63 to 0.70320 Grit StoneNormal Matte finish718 H
D10.80 to 1.00Dry Blast Glass BeadSatin Textured finish718 H
D21.00 to 2.80​Dry BlastDull Textured finish718 H
D33.20 to 18.0Dry BlastRough Textured finish718 H

Plastic Injection Molding Applications

Injection molding is widely used in many fields such as consumer electronics, automotive parts, medical devices, home appliances, etc., such as mobile phone casings, handles of electric tools, handles of medical devices, button panels, protective shells of electronic devices, etc.

The injection molding process is not limited to plastic products, but also can be used for processing of rubber, thermoplastic elastic body and other materials. According to the needs of different products, it can produce parts and components with complex shapes, high accuracy, and excellent performance.

Why Choose Us for Custom Plastic Injection Molding?

By choosing us for custom plastic injection molding services, you will receive a professional, efficient, high quality and personalized service experience. We look forward to working with you to create more value together.

Precision mold manufacturing

We have a first-class mold design and manufacturing team, using CAD/CAM/CAE technology for mold design, and manufacturing high-quality mold steel materials to ensure the accuracy, durability, and production efficiency of the molds, and minimize the rate of defective products.

plastic material

Diversified material applications

We can handle a wide range of thermoplastic materials, including but not limited to ABS, PC, PA, POM, PP, PE, PET, PS, TPU, TPE, etc., and recommend the best material solutions according to customer needs.

Strict quality control

Strict quality control

The implementation of ISO quality management system, from raw material procurement, injection molding production, product inspection to shipment of all links, there are strict quality control measures to ensure product dimensional accuracy, surface quality and performance stability.

plastic injection molding

Fast response and delivery guarantee

We specialize in handling urgent orders and short-term delivery needs, ensuring on-time delivery through lean management and efficient production scheduling, while having emergency backup resources to cope with unexpected production needs.

Our injection molding workshop

Machmaster is a professional enterprise focusing on the production of high-quality plastic products. With its advanced production equipment, exquisite craftsmanship and strict quality management system, it has won widespread praise and trust in the industry.

Strong Equipment Power

We possess advanced injection molding equipment, ranging from small to large tonnage all-electric, hydraulic, and precision systems. These are renowned international brands, guaranteeing stability and efficiency in molding. Additionally, we have comprehensive auxiliary equipment, including mold temperature controllers, robotic arms, and central feeding systems, to cater to diverse and high-precision molding requirements.

Mold Development And Manufacturing

For mold development, our experienced design team utilizes advanced CAD/CAM/CAE technology to ensure scientifically reasonable mold structures and excellent production processes. Our workshop is equipped with high-precision CNC machining centers, EDM spark machines, and slow wire cutting machines, enabling mold accuracy and lifespan to surpass industry averages.

Material Diversification And Process Optimization

Machmaster Supports Processing Various Thermoplastic Materials, Including But Not Limited To ABS, PC, PA, POM, PP, PE, PET, PMMA, TPE, TPU, Etc. It Can Recommend And Use The Most Suitable Injection Molding Materials According To Customer Requirements For Product Performance And Cost. At The Same Time, We Continuously Explore And Optimize Injection Molding Processes To Ensure Efficient And Energy-Saving Production Modes Without Affecting Product Quality.

Strict Quality Control System

Strict Implementation Of ISO 9001 Quality Management System, From Raw Material Procurement, Injection Molding Production To Finished Product Testing, Each Link Has Established A Strict Quality Control Process. We Are Equipped With Advanced Testing Equipment To Strictly Control The Dimensional Accuracy, Appearance Quality, Mechanical Properties And Other Aspects Of The Products To Ensure That Each Product Meets Or Even Exceeds The Customer’s Standard Requirements.

Injection Molding Overview

What’s Injection Molding?

Injection molding is a plastic molding method in which molten plastic is injected into a mold and cooled and cured to obtain a plastic product of the desired shape. This method has the advantages of short cycle time, strong adaptability, high productivity, etc. It is widely used in many fields such as home appliances, automobiles, construction, and medical care.

What are the main advantages of injection molding?

  1. High efficiency and productivity: it can realize automatic production, its short molding cycle, easy and quick mold replacement, high production efficiency, very suitable for mass production.
  2. High precision and quality: injection molding can produce plastic products with complex shapes and precise dimensions, with high quality appearance and high consistency and stability.
  3. Wide choice of materials: it is suitable for molding almost all thermoplastics and a variety of thermosetting plastics, and the most suitable material can be selected according to the performance requirements of the product.
  4. Adaptability: Plastic products with inserts, threads or other complex structures can be easily manufactured, providing strong design flexibility.
  5. Raw Material and Cost Savings: The injection molding process has a high utilization rate of plastic raw materials and low waste, helping to reduce production costs.
  6. Environmental protection and recyclability: Plastic materials are recyclable, and injection molded products can be recycled at the end of their life cycle, in line with environmental requirements.

What Are the 6 Stages of Injection Molding?

  1. Preparation: inspection of the injection molding machine, cleaning or replacement of the barrel, drying and color matching of the raw material, adding the raw material to the hopper.
  2. Melting: raw materials are heated, plasticized, melted and homogenized in the barrel to form a melt.
  3. Injection: The melt is injected into the mold cavity at high speed and high pressure, controlling the injection parameters.
  4. Cooling: The plastic is cooled and cured in the mold.
  5. Demolding: The mold is opened and the product is removed.
  6. Post-processing: removal of impurities, trimming, cleaning, inspection and packaging.

What are the common applications of injection molding?

  1. Automotive field: manufacture parts such as instrument panel, door handle, etc.
  2. Electronic industry: manufacturing electronic product shells, brackets and other tiny parts.
  3. Medical Devices: Manufacture medical instruments such as syringes, infusion sets, etc.
  4. Home Appliances: Manufacture products such as chairs, televisions, washing machines, etc.
  5. Consumer Products: Manufacture of plastic bottles, toys, tableware, and other daily necessities.
  6. Aerospace: Manufacture airplane seats, pipes and other components.

Plastic injection molding is an industrial production method, mainly by heating a thermoplastic particle or powder material to a molten state, and then using pressure to inject the molten plastic into a pre-designed mold cavity, to cool and cure the plastic to form the desired shape and size of the plastic product process. The process is widely used in the mass production of a variety of complex, precision, with high consistency of plastic parts, such as electronic equipment shell, automotive parts, daily consumer packaging, toys, furniture accessories and so on.

The whole injection moulding process usual lasts from 2 seconds to 2 minutes. There are four stages in the cycle. These stages are the clamping, injection, cooling and ejection stages.

Tolerances are crucial in injection molding; without proper specification and control, assembly issues can arise. At Machmaster, we adhere to the ISO 2068-c standard for molding tolerances, but can accommodate tighter specifications if needed.

Once you have developed the moulds, the process is extremely fast with cycle times as short as 10 seconds. It is excellent for medium and high-volume production runs for anything from 10,000 parts to well over 100,000 depending on what moulds you use.

It is a widely used plastic product production process. In this process, the thermoplastic is first heated and melted into a state of good fluidity, and then injected into a pre-designed and manufactured mold cavity through the nozzle of an injection molding machine under high pressure. When the plastic has cooled and solidified, the mold is opened and the molded plastic product is removed.

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