HJ Plastics

Third Floor Gateway House, Tollgate, Chandlers Ford, SO53 3TG

Sets it apart · Injection Moulding — UK · scanned 2026-08-20— click a claim to see its decomposition

About

HJ Plastics Limited, a UK-based contract manufacturer with over 30 years of experience, specialises in high-precision injection moulding and CNC machining from their Lawford, Manningtree, Essex facility, serving a global customer base from multinational corporations to smaller businesses. Their core capabilities include high-volume, close-tolerance injection moulding of polymers from 1 to 870-gram shot weights using 30 to 270-tonne machines, alongside comprehensive solutions like assembly, hand finishing, and secondary machining. HJ Plastics differentiates itself through stringent project timekeeping, offering standard two-week lead times and 24-hour unattended production, supported by energy-saving machinery for competitive pricing and efficient delivery of diverse products, such as components for uPVC doors and windows and water treatment plants.

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HJ Plastics Limited is a UK-based contract manufacturer with over 30 years of experience, specialising in high-precision injection moulding and CNC machining. Located in Lawford, Manningtree, Essex, the company serves a global customer base, including industry leaders, and caters to clients of all sizes, from multinational corporations to smaller independent businesses.

Their core capabilities lie in high-volume, close-tolerance injection moulding, handling projects with shot weights from 1 to 870 grams using injection moulding machines with capacities from 30 to 270 tonnes. HJ Plastics works with a wide array of polymers, including ABS, Nylon, anti-static and UV additive applications, glass-filled components, and high-temperature materials. The company offers comprehensive moulding solutions extending to assembly, hand finishing, and secondary machining operations at a dedicated offsite CNC machine shop, alongside limited storage for call-off requirements.

HJ Plastics prides itself on stringent project timekeeping, with a standard lead time of two weeks and the capacity for 24-hour unattended production. Their use of energy-saving machinery contributes to eco-friendly solutions and low operating costs, enabling competitive pricing and quick project turnarounds with efficient delivery. The company manufactures a diverse range of products, including components for uPVC doors and windows, and parts for water treatment plants, demonstrating their capability for inter-continental deliveries and consistent service levels across various order sizes and project complexities.

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Press fleet3

Moulding processes
Smallest press (t)
Largest press (t)

Materials2

Material modifiers
ESD-capable

Production2

Batch tiers
Handles volume production

Prototyping & NPD1

DFM support

Identity & contact1

Industries served
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Press fleet: Press count · Press brands · Large-format (≥1,000 t) · Premium press fleet · All-electric presses

Moulding capability: Process specialisms · Micro moulding capable · Min part weight (g) · Max part weight (g) · Cleanroom class · Certified cleanroom · Scientific moulding · Joining methods · Decoration · Product specialisms

Materials: Recycled content offered · Recycled feedstock types

Prototyping & NPD: Prototyping routes · Prototypes in final material · Prototyping offered · Product-design service · Mould-flow simulation

Tooling: In-house toolroom · Tool services · Tooling origin · Tool trials offered

Production: Handles prototypes · Runs 24/7 · Bridge production

Assembly & finishing: Assembly offered · 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