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Reaction Injection Moulding (RIM)

Why RIM?

When you need medium to large, durable, flexible (or rigid), lightweight parts with thin walls and intricate detailing, reaction injection moulding (RIM) provides a flexible and cost-efficient solution.

Unlike the more conventional thermoplastic process of injection molding, RIM utilises low-viscosity liquid polymers in thermoset processes. The polymers are injected into a heated mould, where they expand, thicken and harden. This process allows for fine detailing in design to be accommodated; and surface finishes are so good, part finishing times are drastically reduced. Moulds and tools can be created using reinforced silicones, epoxy resins, GRP, or machined from composite materials. The processes allow for over-moulding.

Using our RIM facility for producing high quantities of niche parts gives you access to an experienced team dedicated to delivering unrivalled levels of service and perfect parts on time, every time.

Materials (click for basic data sheet)

RIM Materials 1

PU 3827

An impact-resistant, slightly flexible polyurethane suitable for parts with very thin walls (10mm>x< 2mm).

RIM Materials 2

MG453 GF

Glass fibre re-enforced polyurethane resin with a high heat resistance. Ideal for functional parts, cladding and prototyping applications.

RIM Materials 3

PU 3828s

Polypropylene simulant for high temperature applications such as under-bonnet uses. Available in neutral or black. Can be coloured.


Metermix Par 50 (3 Machines)

Lead time: 2 to 6 weeks, depending upon tooling requirements

Wall thickness: Varies

Part quantities: Can produce 100 parts per day

2KM PGM101 (1 Machine)

Lead time: 2 – 6 weeks

Wall thickness: Variable

Part quantities: 100 parts per day

Case studies

AEuk19 Bumper

Bumper Production

A 50 off monthly order for a major motorsports provider

Turnkey Solutions

All business units contribute to a major VB pre-production run of 500 sets

RIM JCB Wheel Arches

JCB Wheel Arches

Supporting JCB with production runs for their FastTrack prototypes