injection molding parts

Injection Molding

Injection molding is a molding method that combines injection and molding. The advantages of the injection molding method are that the production speed is fast, the efficiency is high, the operation can be automated, there are many varieties of colors, the shape can be from simple to complex, the size can be from large to small, and the size of the product is accurate, the product is easy to replace, and it can be formed into complex shapes. Parts, injection molding is suitable for mass production and complex shape products and other molding processing fields.

We are a leading provider of professional over-molding, injection molding services in China, JTR specializes in providing quality injection molded parts at reasonable prices for a wide range of industries.

Injection molding for ABS material

Injection Molding Capabilities

Lead Time1-4 weeks
MaterialsMost thermoplastics and some metals (such as aluminum and steel)
Machines AvailableExcellent performance and low scrap rate
Injection molding rangeThermoplastic injection tooling including insert and overmolding capabilities
Mold Cavity Tolerances +/- 0.0127cm ( +/- 0.05 inches)
Mold Life guaranteed for at least 2,000 shots

Why Choose Our Injection Molding Services?

JTR machine is one of the best mold manufacturers in China. We have been continuously providing parts molding solutions for various industries, including medical injection molding, electrical injection molding, automotive injection molding, etc.

To meet the large demand of customers for plastic parts, we continuously upgrade our equipment and technology, and in this way provide customers with more high-quality injection molding services, which can meet all your needs for plastic prototypes and mass production.

Injection molding parts

What is Injection Molding?

Injection molding is a manufacturing process for mass-producing parts. It is most commonly used to mass-produce the same parts and components, usually on a scale of tens of thousands or even millions of times.

Liquid plastic is forced into the mold and cured – sounds simple, but a complex process. The liquids used range from hot glass to various plastics – thermosets and thermoplastics.

Because using a multi-cavity injection mold is capable of producing multiple parts per cycle, injection molding is ideal for producing large numbers of plastic parts.

The advantages of injection molding are high tolerance accuracy, repeatability, a wide choice of processing materials, low labor costs, minimal waste loss, and little post-processing such as polishing after molding.

Some of the disadvantages of this process are expensive up-front tooling investment and process limitations.

Injection Molding

Why Choose Injection Molding?

The main advantage of injection molding is the ability to centrally scale up production. Once the machines and molds are ready, the price per unit of the product during production is very low. Prices also drop sharply as more parts are produced. Other advantages include:

Injection Molding Parts
  • Compared to traditional manufacturing processes such as machining, injection molding produces a low scrap rate and can reduce the majority of the original billet or sheet percentage. But injection molding may have slightly higher scrap rates for additive manufacturing processes such as 3D printing.
  • Injection molding generally uses recyclable thermoplastic materials. Discarded scraps and other waste raw materials can be recycled and added to new raw materials in proportion. (Some performance properties of plastics degrade over and over again). These recycled materials are perfectly fine for low-quality parts that don’t require high-performance features.
  • Injection molding is a highly repeatable process. That is, the entire process of production can be replicated. This way of working allows for good control over product consistency and part reliability in the mass production of parts.

Advantages of Injection Molding

Good dimensional accuracy

Excellent surface finish

Can be mass-produced

Almost no post-processing such as polishing is required after the part is formed

Automated production to save your costs

Excellent repeatability and flexibility

Professional engineers supervise the whole manufacturing process, and the scrap rate is low

It can be formed into complex-shaped parts, suitable for mass production and complex-shaped products and other forming processing fields.

Injection Molding Materials

We can complete injection molding of almost any thermoplastic.

ABS Plastic
  • ABS plastic is a terpolymer of three monomers, acrylonitrile (A), butadiene (B), and styrene (S). The relative content of the three monomers can be arbitrarily changed to make various resins.
  • ABS has the common properties of three components, A makes it resistant to chemical corrosion, heat resistance, and has a certain surface hardness, B makes it have high elasticity and toughness, and S makes it have the processing and molding characteristics of thermoplastics and improve electrical properties.
  • Therefore, ABS plastic is a kind of “tough, hard, and rigid” material with easily available raw materials, good comprehensive performance, low price, and wide application. a wide range of applications.
polycarbonate for injection molding
  • PC (polycarbonate) is also a plastic material commonly used in the manufacture of products
  • PC is scratch-resistant, and it can be mixed with other plastics to form tougher materials.
  • In addition, PC can also be mixed with the synthetic hormone BPA, a hormone-interfering hormone, to increase the PC’s hardness and prevent it from cracking or cracking with heavy use, such as a child’s feeding bottle.
  • PC is very strong, has perfect transparency, adjustable hardness, high-temperature resistance, recyclable. PC plastic can be molded by injection molding, extrusion molding, blow molding, thermoforming, and more.
Nylon For Injection Molding
  • Nylon has a wide range of uses. It is a good material for plastics to replace metals such as steel, iron, and copper. It is an important engineering plastic. Cast nylon widely replaces wear-resistant parts of mechanical equipment and replaces copper and alloys as wear-resistant parts of equipment.
  • Nylon is suitable for making wear-resistant parts, transmission structural parts, household electrical appliances parts, automobile manufacturing parts, screw protection mechanical parts, chemical machinery parts, chemical equipment. Such as turbines, gears, bearings, impellers, cranks, instrument panels, drive shafts, valves, blades, screw rods, high-pressure washers, screws, nuts, seals, shuttles, sleeves, bushing connectors, etc.
PBT plastic for injection molding
  • PBT engineering plastic is a thermoplastic polyester. Compared with other thermoplastic engineering plastics, non-reinforced PBT has better processing properties and electrical properties.
  • The main application fields of PEEK: the transportation industry market such as automobiles (including aviation) accounts for about 50% of the consumption of PEEK resin, semiconductor manufacturing equipment accounts for 20%, general mechanical parts such as compressor valve plates account for 20%, medical equipment, and analysis Instruments and other markets accounted for 10%.
PEI plastic for injection molding
  • PEI is also known as poly(ethyleneimine). A water-soluble high molecular polymer. Colorless or pale yellow viscous liquid, hygroscopic, soluble in water, ethanol, insoluble in benzene.
materials for injection molding
  • In addition to common injection molding materials, JTR also provides more injection molding materials, including POM, PMMA, etc. For more information, please contact us for more information.

Injection Molding Applications

Injection mold is important to process equipment for the production of various industrial products. With the rapid development of the plastic industry and the promotion and application of plastic products in aviation, aerospace, electronics, machinery, ships, automobiles, and other industrial sectors, the requirements of products on molds are also increasing. The higher the age, the more traditional mold design methods have been unable to meet today’s requirements. Compared with traditional mold design, computer-aided engineering (CAE) technology can improve productivity, ensure product quality, or reduce costs and labor intensity. On the other hand, they have great advantages.


Electronic Products




Injection Molding Surface Finishes

Injection-molded parts are available in a variety of surface finishing. Plastic parts and parts made of other materials can have various types of finishes for aesthetic or functional purposes. Different types of injection-molded surfaces are reworked through different processes to create new products with different textures, looks, and feel.

  • Standard Finish

Surface treatment options for mold makers.

  • As Molded

No secondary polishing or grinding. The part will show tooling marks.

  • Laser Engraving

Engrave part numbers, logos, and more onto your parts.

injection molding surface finishes

Injection Molding FAQs

Injection molding is through the creation of plastic or metal parts within a mold. They are then removed from the mold as fully formed parts.
3D printing, on the other hand, is an additive manufacturing process, which means that parts are built layer by layer using processes such as deposition or sintering.
Compared with 3D printing, injection molding is more suitable for the mass production of parts.

Not only plastics can be used for injection molding, but metal (metal injection molding), rubber, etc. can all be processed by injection molding.

How to Get An Online Injection Molding Quote?

When you request an injection molding quote, you not only receive accurate pricing in a short period of time. and receive our manufacturing analysis. Our online quotation platform also provides you with gate and ejector pin layouts and a price curve tool to help you choose the best tool option for your project.

Upload your 2D/3D files

Choose the process

Order your parts online

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