SGH Moulds Ltd: British Precision, End-to-End Plastics Manufacturing, and a Cleaner Supply Chain

For more than 40 years, SGH Moulds Ltd has been designing, manufacturing, and assembling plastic components and products in the UK. As proud GTMA members, we combine a fully staffed, UK-based toolroom with Class 8 cleanroom production, injection moulding from 22 to 650 tonnes, and finished-goods assembly—giving customers a single, accountable partner from concept to carton. Today, as Scope 3 emissions reporting tightens across global supply chains, we’re helping OEMs bring work home from India and China, shortening logistics, lowering risk, and cutting the hidden carbon that sits between factory and end user.

Why “Made in Britain” Matters More Than Ever

Repatriating tooling and moulded part production isn’t only about patriotic preference—it’s a strategic lever. Extended shipping routes, multi-tier suppliers, and long change cycles have created fragility and inflated Scope 3 footprints. Manufacturing in the UK with SGH means fewer miles, faster iterations, and clearer provenance. Our customers gain predictable lead times, tighter IP control, and a direct line to the engineers who design and maintain their tools. The result is a supply chain that’s leaner, cleaner, and easier to audit—ready for the regulatory and customer-driven sustainability thresholds expected from 2026 onward.

A Fully Equipped, UK-Based Toolroom

At the heart of SGH is our in-house toolroom—manned by seasoned toolmakers and process engineers who understand the realities of production, not just the theory of design. We deliver:

•  New tool design and manufacture for prototype, bridge, and full-production moulds
•  Complex tooling including multi-cavity, family tools, and complex mechanisms
•  Preventive maintenance and repair with rapid turnaround to protect uptime
•  Tool transfer projects—auditing, refurbishing, and validating inherited tools

Because design, machining, metrology, and try-outs are under one roof, we close the loop quickly. Issues are solved at source, not shipped across continents. That translates into fewer compromises, steadier cycle times, and parts that meet spec from day one.

Scalable Injection Moulding: 22–650 Tonnes

Our press range spans 22 to 650 tonnes, allowing us to run everything from micro-components to sizeable structural parts across commodity and engineering polymers. Scientific moulding disciplines underpin our setups and validations, ensuring repeatability and efficient cycle times. You can expect:

•  Process windows built on data, not guesswork
•  Automated handling to reduce touchpoints and improve consistency
•  In-line inspection keyed to critical-to-quality features
•  Decoupled moulding and robust change control for every job

For regulated sectors, we back this with full batch traceability and documented process control, so quality evidence travels with every shipment—not just the parts.

Clean by Design: Class 8 Cleanroom Production

Many programmes today straddle standard and controlled environments. SGH’s ISO Class 8 cleanroom provides the headroom for medical, healthcare, and other sensitive applications without adding complexity to your supplier base. We can mould, sub-assemble, inspect, and pack within controlled conditions, aligning cleanliness with your product’s risk profile. Whether you need sterile-barrier packaging support or simply bioburden-controlled parts, our team builds the right SOPs and validation plan to match.

From Components to Complete Products: Finished-Goods Assembly

SGH doesn’t stop at the machine door. Our assembly lines and skilled operatives deliver value-added operations that compress timelines and reduce multi-vendor coordination:

•  Ultrasonic welding, heat staking, and adhesive bonding
•  Mechanical and electro-mechanical assemblies
•  Kitting, labelling, and retail-ready or hospital-ready packaging
•  Functional testing and verification to customer-defined standards

By pairing moulding with assembly, we eliminate logistics handoffs, shrink WIP, and keep quality ownership clear. Customers often see faster ramp-ups and fewer non-conformances because design, tooling, and assembly teams solve problems together.

Certified Quality Today, Environmental Management Tomorrow

Operational excellence is non-negotiable. SGH is ISO 9001 accredited, underpinning our approach to risk-based thinking, CAPA, and continuous improvement. We’re also on track to achieve ISO 14001 by April 2026, formalising the environmental practices we’ve been building for years—energy monitoring, waste minimisation, and material stewardship. As Scope 3 accounting becomes mainstream, our environmental management system will give customers auditable data and practical routes to footprint reduction: shorter supply chains, optimised batch sizes, and material choices guided by both performance and impact.

Competing with Overseas Manufacturing—On Total Cost, Not Just Piece Price

We recognise the pressure of unit pricing, especially when benchmarks come from high-volume facilities overseas. Our stance is simple: compete on total cost and total value. When you model expedited freight, buffer stock, long-distance communication overhead, IP risks, and the cost of variability, UK manufacturing with SGH often beats the offshore alternative—while giving you faster engineering loops and lower carbon miles. For many programmes, we can phase work to prove the economics: start with a tool transfer or a subset of SKUs, validate quality and lead time, then scale with confidence.

Sectors We Serve—and How We De-Risk Them

SGH supports healthcare and medical, government and utilities, construction products, aerospace interiors, and industrial applications. Across these verticals, we tailor our approach:

•  Healthcare & Medical: Cleanroom moulding, biocompatible materials guidance, DHR/lot traceability, and validated assembly processes.
•  Aerospace Interiors: Weight and flame/smoke/tox performance managed through material selection and repeatable moulding discipline.
•  Construction & Utilities: Rugged, UV-stable, and weather-resistant components, with design tweaks to simplify assembly in the field.
•  Industrial: Robust tooling strategies that focus on uptime, maintenance access, and consistent Cp/Cpk over long runs.

Our teams produce around a million components annually, which means we’re large enough to invest in technology and small enough to stay responsive. You’ll always know who to call—and they’ll know your programme in detail.

Designed for Manufacturability from Day One

Great outcomes start early. SGH’s engineers collaborate on DFM and DFA to stabilise part geometry, gate locations, wall sections, and draft angles. We simulate risk areas, plan cooling, and design tooling for maintainability. This preparation pays dividends at SOP: fewer shorts or sinks, better venting, stable ejection, and predictable cosmetics. When the realities of the market demand a change—material substitution, aesthetic refresh, or performance tweak—we iterate quickly because the toolroom, moulding, and assembly are aligned.

A Practical Partner for 2026 and Beyond

Regulations are tightening, customers are asking tougher questions, and resilience is now a board-level metric. If you’re looking to reshore tooling, localise injection moulding, or consolidate assembly with a single UK partner, SGH is ready. We bring four decades of British manufacturing heritage, ISO 9001 rigour, a committed path to ISO 14001 by April 2026, Class 8 cleanroom capability, and a press fleet from 22 to 650 tonnes—all backed by a fully staffed UK toolroom that keeps your programme running day in, day out. “Bringing tooling and moulding back to Britain isn’t nostalgia—it’s smarter economics, sharper quality, and a lighter Scope 3 footprint. That’s the SGH standard