Injection Moulding
At Cranfield Group, plastic injection moulding is at the heart of what we do – but it’s our ‘leave it with us’ approach that sets us apart. We don’t just mould parts; we take complete ownership of your manufacturing challenges, finding solutions that work for your business.
Our state-of-the-art facilities feature injection moulding machines ranging from 55T to 550T clamp force, capable of producing everything from intricate micro-components to substantial industrial parts. But it’s how we flex to meet your needs that makes the difference. Whether you require high-performance technical thermoplastics or standard commodity grades, contract moulding or complete outsourced manufacturing, we listen, learn and deliver solutions that exceed expectations.
Why Choose Cranfield Group
Two Sites, One Group, & Decades of Proven Manufacturing Experience
- Full-Service Manufacturing – From design optimisation and toolmaking through to assembly and distribution, we manage every stage internally for seamless communication and complete quality control.
- Technical Expertise – Our engineers specialise in complex, high-performance materials and challenging applications, meeting stringent standards for automotive, medical, defence and other demanding sectors.
- Flexible Production – Our 24-hour facilities handle everything from prototype runs to high-volume manufacturing, maintaining consistent quality whether producing 100 or 100,000 parts.
- Quality Assurance – ISO 9001:2015 certified processes with rigorous inspection and documentation ensure every component meets specifications with perfect repeatability.
What Is Injection Moulding?
Injection moulding is a manufacturing process where molten plastic material is injected under pressure into a precision-engineered mould cavity. Once cooled and solidified, the mould opens to release a finished plastic component that exactly matches the cavity’s specifications.
This versatile process creates everything from tiny electronic connectors to large automotive panels. It offers exceptional repeatability, making it ideal for producing identical components in volumes ranging from hundreds to millions. The process works with virtually any thermoplastic material, from basic polypropylene to high-performance engineering polymers.
Common applications include:
- Automotive components and assemblies
- Medical device housings and components
- Electronic enclosures and connectors
- Industrial equipment parts
- Consumer product components
- Technical components requiring tight tolerances
Industries we serve
Our plastic injection moulding expertise extends across diverse sectors, each with unique requirements and standards. From high-volume consumer goods to precision technical components, we adapt our processes to meet your specific industry needs:
Reliable, high-tolerance parts for demanding interior, exterior, and under-bonnet applications.
Precise mouldings for pumps, valves, and liquid handling systems requiring repeatable performance.
Technical housings, clips, and connectors manufactured using flame-retardant and ESD-safe materials.
Bright, durable components used in signage, PPE accessories, and workplace safety products.
Engineered plastic parts designed to reduce weight and cost without compromising strength or stability.
Custom rubber components manufactured to tight tolerances using natural, synthetic, or silicone rubbers.
Plastic mouldings for communication equipment, including enclosures and structural components.
Flexible, reliable moulding services for manufacturers needing additional capacity or project support.
Ready to discuss your injection moulding requirements? Our technical team can advise on materials, design optimisation and the most cost-effective route to manufacture. Contact us to start your project.
Quality Control
Our commitment to quality goes beyond certification. With ISO 9001:2015 accreditation across our facilities, we maintain rigorous quality management systems that ensure every component meets or exceeds your specifications.
Our quality processes include:
- First article inspection and approval
- In-process quality monitoring
- Statistical process control
- Full material traceability
- Documented inspection procedures
- Customer-specific quality requirements
We work with some of the world’s most demanding brands, maintaining their exacting standards through systematic quality control at every production stage. Our comprehensive quality management ensures perfect repeatability and full traceability across all production runs.
Additional Services
Complete Manufacturing Solutions From Cranfield Group
Beyond plastic injection moulding, we offer comprehensive services that transform raw materials into finished products ready for market. Our integrated capabilities mean fewer suppliers, simplified logistics and consistent quality:
Expert engineering support to optimise components for efficient manufacture and superior performance.
Rapid prototype production and testing to validate designs before committing to production tooling.
Specialist manufacturing of rubber components using dedicated thermoset processing equipment.
Complete mould tool solutions from design through manufacture, maintenance and lifetime support.
Value-added processes including printing, welding, and kitting. Turn basic mouldings into complete, market-ready products.
Complete assembly services transforming components into finished products. From simple two-part assemblies to complex multi-component builds.
Custom packaging design and flexible logistics solutions. From bulk packaging to JIT delivery supporting your production schedules.
Not sure which services you need? Our technical team can guide you through the options and develop the right solution for your project.
Frequently Asked Questions
Your Injection Moulding Questions Answered
What information do you need to provide a quotation?
Ideally, CAD data along with annual volumes, material requirements and any special specifications. If CAD isn’t available, we can work from samples, drawings or even sketches to develop your requirements.
Do you sign non-disclosure agreements?
Absolutely. We regularly work on confidential projects and are happy to sign your NDA before discussing any project details.
Can you work with existing tools?
Yes, we frequently take on tool transfers from other moulders. We’ll assess your tools, perform any necessary refurbishment and optimise the moulding process for our equipment.
How quickly can you deliver production parts?
Lead times vary by project complexity, but our 24-hour production capability enables rapid turnaround. We’ll provide accurate timescales during quotation.
Whether you’re developing a new product or seeking a reliable UK manufacturing partner, Cranfield Group delivers the technical expertise and production capability you need. Contact our team today to discuss how we can support your injection moulding requirements.