Gemini are experts in custom plastic injection moulding of complex components in a variety of materials for industries in the UK and worldwide. Our injection moulding services run from prototype to production, with finishing and assembly under the same roof so a single part can go from first-off to boxed dispatch without leaving the site.
What Gemini
For a step-by-step walkthrough of the process, read our guide to the injection moulding process.
Our Process
From the first sketch to the final boxed part, every stage runs in our own UK facilities. Nothing is subcontracted, one team, one site, and full accountability from enquiry to dispatch.
We refine your concept with in-house CAD and design-for-manufacture, then cut and prove the tooling on site, before a single part is made.
Your part is injection moulded in our own UK facilities, from first-off samples through to full production volumes, on our own presses.
Finishing, decoration, sub-assembly and packing all happen under the same roof, leaving us ready to dispatch a complete, inspected product.
In-House Capability
Material Selection
Material choice shapes how a part performs, how it looks and what it costs. These are the five factors we weigh with you before a tool is cut, mapped to the plastics we mould most.
These five factors are covered in more depth, material by material, in our guide to injection moulding materials.
Five materials have a page of their own, covering typical properties, limitations and what to watch on the machine: ABS injection moulding, acrylic moulding, nylon injection moulding, polycarbonate injection moulding and polypropylene injection moulding.
Send us details about your part and we'll get back to you within 24 hours.
Industries We Serve
Inside Gemini
Case Studies
The nominally prototype parts were treated by Toyota as if they were actual production parts, and performed very well throughout test and validation. The overall quality and timing have been very strong.
FAQ
A manufacturing process in which molten plastic is injected under pressure into a mould tool, cooled until it solidifies and then ejected as a finished part. It produces accurate, repeatable components, from complex parts made in small numbers to large production runs.
Yes. Prototype runs of 5 to 500 parts are moulded on aluminium and bridge tooling, so a part can be proved in the real production material before committing to hardened steel, with a clean route into full production on the same site.
Thermoplastics from commodity polymers to engineering and high-performance grades, including ABS, acetal (POM), acrylic (PMMA), HDPE, nylon (PA), polycarbonate (PC), polyethylene (PE) and polypropylene (PP).
We do. For as long as you manufacture with us, we maintain and replace your mould tool free of charge.
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