Bespoke Injection Moulding Solutions

Plastic Injection Moulding Services

Great Central Plastics are UK plastic injection moulders based in Northamptonshire, manufacturing high-quality bespoke plastic products since 1998. From our in-house mould shop we run a range of injection moulding machines from 22 to 160 tonnes, giving us the flexibility to produce a wide variety of components in different sizes, all under one roof.

With fully automated production and 24/7 operation, we handle both low-volume and high-volume runs efficiently, with a minimum order quantity that makes even small bespoke projects viable. This flexibility means competitive pricing, dependable lead times and a genuine one-stop shop for your project, from initial design and toolmaking through to moulding and finishing.

Bespoke Injection Moulding

Bespoke injection moulding is at the heart of what we do. Whether you're bringing an existing design or starting from a concept, we tailor every aspect of the process, tooling, material, colour and finish to your exact requirements. Our experienced team works with you from the first sketch to the finished part, ensuring your product is optimised for manufacture and produced to a consistent, repeatable standard. It's this tailored, end-to-end approach that has made us a trusted bespoke injection moulding partner for over 25 years.

Our Injection Moulding Capabilities

As established plastic moulders, we've built a mould shop designed for flexibility and quality:

Machine range: injection moulding machines from 22 to 160 tonnes, suited to small precision components through to larger bespoke parts.
Volumes: cost-effective low-volume and prototype runs as well as fully automated high-volume production.
24/7 automated production: maximising output, consistency and value.
One-stop service: in-house toolmaking, product design, 3D printing and post-moulding finishing under one roof.
You can view our full machine list on our injection moulding plant list.

Materials for Injection Moulding

We offer an extensive selection of versatile thermoplastic polymers, each grade carefully chosen to deliver optimal performance for your application. Whether you need fully certified food-grade materials, engineering-grade plastics for demanding automotive and industrial parts, or eco-friendly alternatives such as recycled, plant-based and biodegradable plastics, we can specify the right material for the job. For more detail, see our guide to the thermoplastic materials we work with.

To add vibrancy and customisation, we incorporate masterbatch colouring additives, matching to Pantone specifications and offering special effects including glitter, fluorescent, glow-in-the-dark, edge-glow, transparent and pearlescent finishes, helping your product stand out.

Industries We Serve

Our bespoke injection moulding supports customers across a wide range of sectors, including automotive, consumer products, food and drink, promotional products and industrial components. Over the years we've manufactured for some of the UK's best-known brands, a track record that reflects the quality, reliability and consistency we build into every project. Explore examples in our automotive, bespoke and promotional work.

Why Choose Great Central Plastics as Your Injection Moulders

Established 1998: over 25 years as trusted UK plastic injection moulders.
ISO 9001:2015 registered: quality management you can rely on.
Made in Britain: all moulding carried out at our Northamptonshire facility.
Sustainable processing: solar power generates around a third of our energy, and recycled materials are used wherever possible.
One-stop shop: design, tooling, moulding and finishing in-house.

When you choose Great Central Plastics, you gain a reliable partner committed to delivering exceptional results at every step. Contact us today to discover how our plastic injection moulding services can bring your vision to life.

FAQs

Yes. We are a British plastic injection moulder based in Woodford Halse, Northamptonshire, and have been manufacturing in the UK since 1998. All of our injection moulding is carried out here in the UK.

Yes. We provide a fully bespoke injection moulding service, with tooling, materials, and finishes tailored to your requirements. Our flexible minimum order quantities also make low-volume and prototype runs viable, as well as high-volume production.

Injection moulding is the most common method for mass-producing plastic items, thanks to its speed, efficiency, low waste, durability and ability to handle complex parts at scale.

Injection moulding is the process used to produce high-volume plastic parts to a given specification by injecting molten thermoplastic into a tool or mould and allowing it to cool into its solid form.

For a more detailed breakdown of the process, materials, and applications, read our Injection Moulding Explained blog.

“Plastic moulder” is a general term for a company that manufactures plastic products using various moulding processes. An injection moulder specifically uses injection moulding, a process where molten plastic is injected into a mould to form precise, high-volume parts. Great Central Plastics are plastic injection moulders, specialising in this process.

Below is a brief overview of the injection moulding process:

Design the 3D part using CAD.
Manufacture a precision mould tool.
Select the most suitable thermoplastic.
Melt the plastic in the machine barrel.
Inject it under high pressure into the mould cavity.
Cool and solidify.
Eject the finished part.
Repeat for consistent, identical parts.

To explore each stage in more detail, read our Injection Moulding Explained blog for a deeper look at how the process works from design through to production.

It allows intricate shapes, high production efficiency and precise dimensional control across thousands or millions of identical components, making it ideal for everything from small precision parts to larger automotive components.