Injection Moulding for Plastic and Polymer Components 

From component design to repeat production. Explore our information page for custom fastener dimensions, housings, fittings, and functional polymer parts.

Our team will help select the right manufacturing method and material to match your production volume and long-term demand.

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What is injection moulding? 

Injection moulding is a manufacturing process used to produce plastic and polymer components by injecting molten material into a specially designed mould. The material cools and solidifies into the required shape before the mould opens and the finished part is released. This process is well suited to producing repeat quantities of custom components, including housings, fittings, clips and connectors.

Why Choose This Route: The Benefits for Polymer Components 

  • 1. Repeatability

    Reproduce a defined design

    Use the same tool to produce repeated shapes, with process control and inspection agreed for the component.

  • 2. Integrated Features

    Build function into the part 

    Combine ribs, bosses, clips and other mouldable features to reduce the need for separate components.

  • 3. Production Economics

    Plan beyond the first batch 

    Spread tooling cost across production demand. The economic case depends on part complexity, grade and volume.

  • 4. Material Choice

    Match performance to service

    Consider wear, chemical exposure, temperature, stiffness, and electrical requirements when selecting a grade.

Which plastics can be injection moulded?

PEEK, PEI, PPS

These high performance polymers are ideal for producing custom parts for demanding applications 

PP, PE

For general purpose use, these materials are ideal with their high stiffness and environmental suitability. 

POM, PA

To produce components in this material, friction, loading and moisture effects need to be considered to avoid dimensional issues. 

PC

Ideal if a component requires transparency 

PVDF

If corrosion and chemical resistance is required, PVDF can easily be injection moulded. 

Glass Filled Grades: RENY, PEEK GF30, PA66 GF60

RENY is known for its ability to be easily injection moulded. PEEK GF30 requires an elevated mould temperature, but the process is achievable. PA66 GF60 can be injection moulded, and is often used as a metal replacement because of its high stiffness. 

What components can be moulded? 

  • Housings & covers

  • Bushes & spacers

  • Clips & retainers

  • Fittings & connectors

  • Electrical components

  • Custom screws

Injection Moudling Process: 

1. Design Review

We review your component specifications and CAD drawings, as well as your required volume to see if injection molding would be suitable.

2. Material Selection

We help you choose the right material for your performance and cost goals.

3. Precision Injecting

Polymer granules are heated until molten, then pressed into a precisely engineered mold. The polymer cools and solidifies into the required shape, after which the mold opens and the finished component is ejected.

Inspection and Certification

Your component(s) are then fully inspected and sent to you with a CoC.

Get your quotation here in 24 hours: 

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What to include: 

  • Dimensioned drawing and available CAD file
  • Material and grade
  • Thickness or finished dimensions
  • Quantity and repeat demand
  • Critical tolerances and finish
  • Application and delivery date
  • Certification or inspection needs
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Frequently Asked Questions 

It can be, although the cost of dedicated tooling needs to be considered. CNC machining may be more economical for prototypes or smaller quantities, while injection moulding can become attractive as repeat demand increases.

Cost depends on the material, component size and complexity, mould construction, cavity count, production quantity and inspection requirements. Tooling is an initial investment, while the cost per part depends on the production process and order volume.

Achievable tolerances depend on the polymer grade, component geometry, shrinkage, tooling and processing conditions. Critical dimensions and fit requirements should be clearly identified on the drawing and reviewed before tooling begins.

Yes, these features can be incorporated into suitable designs. Some may require additional tooling actions, insert installation or secondary machining, which can affect cost and production time.

Yes, suitable glass-filled grades can be injection moulded to increase stiffness and strength. Fibre orientation can affect shrinkage, warpage, and mechanical properties, so the design and loading conditions need careful consideration.

A mould can usually support repeat production while it remains serviceable and the component specification remains suitable. Tool ownership, storage, maintenance and expected life should be agreed before manufacture.