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Injection moulding plastic parts

Direct from the injection moulding manufacturer

Injection moulding is a widely used manufacturing process for producing high volumes of precision plastic components. It involves injecting molten plastic into a custom-designed mould, where it cools and solidifies into the final shape. The advantages of injection moulding are that it's ideal for creating durable, consistent, and cost-effective parts across industries such as automotive, electronics, medical, and consumer goods. igus has over 800 injection moulded machines, producing 245,000 different products in over 1 million variations.

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Other manufacturing capabilities

3D printing

3d printing injection moulding
3d printing injection moulding

Our filaments, powders, and resins are engineered to reduce friction and wear, offering maintenance-free performance with built-in solid lubricants. They deliver longer service life than conventional plastics and match the durability of injection-moulded parts—ideal for FDM, SLS, and DLP printing.

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CNC Machining

cnc machining injection moulding
cnc machining injection moulding

CNC machining is a precision manufacturing process that uses computer-controlled tools to produce complex components with exceptional accuracy. It ensures consistent quality, tight tolerances, and fast turnaround across industries like aerospace, automotive, and engineering.

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Powder Coating

powder coating injection moulding
powder coating injection moulding

Powder coating is a durable finishing process that applies a dry powder to metal surfaces, then cures it under heat to form a tough, protective layer. It offers excellent resistance to corrosion, chemicals, and wear—making it ideal for industrial, automotive, and architectural applications.

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To on demand manufacturing

Injection moulding materials

injection moulding materials

With over 50 core materials, as well as many development materials, our injection moulded machines are busy 24 hours a day! We have materials for

  • high temperature,
  • chemical resistance
  • high loads and many more.

All lubrication free!

View the top igus materials

Injection moulding process step by step

injection moulding manufacturers

Step 1- material preparation

Thermoplastic polymers, typically in the form of small pellets or granules, are selected based on the product's requirements (e.g. strength, flexibility, colour). These pellets are dried to remove moisture, which could affect the quality of the final product. Common materials include polypropylene (PP), acrylonitrile butadiene styrene (ABS), and polycarbonate (PC).

injection moulding manufacturers

Step 2- Melting

The dried pellets are fed into a heated barrel via a hopper.

Inside the barrel, a rotating screw pushes the material forward while heating elements melt it into a uniform molten state. Temperature control is critical to ensure consistent melting without degrading the polymer.

injection moulded plastic parts

Step 3- injection

Once the plastic is molten, the screw acts like a plunger, injecting the material into a steel mould cavity at high pressure. The mould is precision-engineered to form the exact shape of the desired part, including fine details and surface textures.

plastic injection moulding

Step 4- cooling

After injection, the mould remains closed while the plastic cools and solidifies. Cooling channels within the mould circulate water or oil to speed up this process. Proper cooling ensures dimensional accuracy and prevents warping or shrinkage.

injection moulded plastic parts

Step 5- Ejection

When the part has cooled sufficiently, the mould opens and ejector pins push the finished component out of the cavity. The part may then be transferred to a conveyor or robotic arm for further processing, such as trimming or quality inspection.

Injection moulding process step by step

Step 6- Repeat cycle

The mould closes again and the cycle repeats. Injection moulding machines are designed for high-speed, automated operation, making them ideal for producing thousands or even millions of identical parts efficiently.

Frequently asked questions

Injection moulding is a manufacturing process used to produce large volumes of plastic parts by injecting molten material into a mould. It’s ideal for creating complex, durable components with high precision and repeatability, commonly used in industries like automotive, electronics, and consumer goods.

Injection moulding can be expensive upfront due to the cost of designing and manufacturing custom moulds, especially for complex parts. However, it's highly cost-effective for large production runs, as the per-unit cost drops significantly with volume, making it ideal for mass manufacturing.

There are a variation of materials, some of the typically conventional ones are Poypropylene, ABS, Nylon, POM. We have over 50 igus materials which are a blend of filaments, including self lubrication elements.

Injection moulding is used because it allows manufacturers to produce large quantities of complex, high-precision plastic parts quickly and cost-effectively. It offers consistent quality, minimal waste, and is ideal for mass production across industries like automotive, electronics, and consumer goods.

Key advantages of injection moulding in manufacturing:

  1. High Efficiency – Ideal for mass production with fast cycle times.
  2. Consistent Quality – Produces identical parts with tight tolerances.
  3. Low Waste – Excess material can often be recycled and reused.
  4. Design Flexibility – Supports complex shapes and detailed features.
  5. Cost-Effective at Scale – Lower per-unit cost for large volumes.
  6. Material Variety – Compatible with a wide range of plastics and additives.
  7. Durability – Produces strong, long-lasting components.

Injection moulding can be sustainable when managed responsibly. Many manufacturers use recyclable plastics, energy-efficient machinery, and optimise production to reduce waste—making it a viable option for eco-conscious, high-volume manufacturing.

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