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Knowledge Base

Insights & Guides

Guides and thinking on prototyping, moulding and getting parts made in the UK.

GuideAn engineer loading an injection mould tool into an injection moulding machine at Gemini
16 October 20268 min read

Injection Mould Tool Design Explained

Injection mould tool design explained: the parts of a tool, aluminium and steel tooling, and the design decisions that affect tooling cost and lead time.

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GuideThe BOY 55A liquid silicone rubber injection moulding machine at Gemini
16 October 20265 min read

Thermoset or Thermoplastic? What It Changes for Your Part

The difference between thermoset and thermoplastic materials, and what specifying a thermoset changes about tooling, recycling and who can mould your part.

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GuideControl panel of the silicone injection moulding machine at Gemini, mid injection cycle
18 September 20266 min read

What is Overmoulding?

Overmoulding explained: how the process works, two-shot against pick-and-place, how the bond between materials is made and how it differs from insert moulding.

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GuidePlastic granules of the kind fed into an injection moulding machine
15 September 202613 min read

Injection Moulding Materials: Properties, Applications and How to Choose

The main injection moulding materials compared: ABS, PP, PC, nylon, acetal, HDPE, acrylic and TPU, with how to choose one for your part. Read the guide.

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GuideLarge JWELL plastic blow moulding machine on the Gemini factory floor
13 August 202612 min read

What Is Blow Moulding? The Process, Types and Applications

How the blow moulding process works, step by step: extrusion, injection and stretch blow moulding, materials, and how it compares with injection moulding.

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GuideEngineer replacing the mould tool inside an injection moulding machine
13 August 202611 min read

The Injection Moulding Process: A Complete Guide

How injection moulding works, step by step: the seven stages of the process, the main moulding types, common materials and the industries that use them.

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