Stef Plastics
Unit 3 Hedingham Road, Wethersfield, Braintree, CM7 4EQ
About
Stef Plastics Limited, a UK-based plastic injection moulding company established in 1984, specialises in the precision moulding of commodity and engineering thermoplastics. Their comprehensive service includes in-house design and toolmaking, utilising five Boy Machines with clamping forces from 22 to 50 tonnes and shot weights up to 140 grams, employing both single impression and hot runner systems. Serving diverse sectors such as construction, electronics, leisure, furniture, building, automotive, and model railways, Stef Plastics differentiates itself through strict quality control, prompt turnaround times, and extensive support including component and tooling design, material selection, and post-moulding operations like trimming and assembly.
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Stef Plastics Limited is a well-established UK-based plastic injection moulding company with a history dating back to 1984. They specialise in the precision moulding of a broad spectrum of commodity and engineering grade thermoplastics, offering a comprehensive service from their dedicated facility.
Their core capabilities include injection moulding, supported by in-house design and toolmaking services. Stef Plastics operates five Boy Machines with clamping forces from 22 to 50 tonnes, capable of handling shot weights from 0 to 140 grams, utilising both single impression and hot runner systems. They cater to a diverse range of industries, including construction, electronics, leisure, furniture, building, automotive, and model railways.
Stef Plastics prides itself on strict quality control, prompt turnaround times, and a highly experienced team. They offer extensive support, including component and tooling design, material selection, and post-moulding operations such as trimming and assembly, all within a quality-controlled environment.
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Press fleet6
- Moulding processes
- Injection moulding
- Smallest press (t)
- 22
- Largest press (t)
- 50
- Press count
- 5
- Press brands
- BOY
Moulding capability4
- Process specialisms
- Insert moulding
- Max part weight (g)
- 140
- Joining methods
- Insert fitting
- Product specialisms
- Automotive components, Construction fittings
Production1
- Batch tiers
- Low volume
Prototyping & NPD1
- DFM support
- Yes
Tooling2
- In-house toolroom
- Yes
- Tool services
- Design & build
Assembly & finishing1
- Assembly offered
- Yes
Identity & contact1
- Industries served
- Construction, Electronics & electrical, Leisure & sport, Furniture
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Press fleet: Large-format (≥1,000 t) · All-electric presses
Moulding capability: Micro moulding capable · Min part weight (g) · Cleanroom class · Certified cleanroom · Scientific moulding · Decoration
Materials: Material modifiers · Recycled content offered · Recycled feedstock types · ESD-capable
Prototyping & NPD: Prototyping routes · Prototypes in final material · Prototyping offered · Product-design service · Mould-flow simulation
Tooling: Tooling origin · Tool trials offered
Production: Handles prototypes · Handles volume production · Runs 24/7 · Bridge production
Assembly & finishing: Assembly capabilities
Machining: Contract machining
Quality & inspection: FAI methodology · CMM · Inspection stages · SPC / Cpk · Automated vision QC
Certifications & accreditations: ISO 9001 · ISO 14001 · ISO 13485 · IATF 16949 · BRCGS Packaging · AS9100 · Cyber Essentials · Food-contact compliance · UL listing · Trade bodies