Reaction Injection Moulding & Polyurethane Casting Berkshire

Reaction Injection Moulding – or RIM for short, offers many of the benefits of traditional injection moulding whilst allowing for rapid design iterations and shorter production runs. RIM materials offer outstanding mechanical characteristics with predictable behavior in a wide range of operating environments, making them perfectly suited to not only functional prototypes but production components.


Polyurethane Casting

Prototype RIM components

RIM resins comprise of addition cure polyurethane resins, mixed upon entry and injected into a cavity mould. The resins are carefully formulated to exhibit controlled mechanical characteristics commonly reflecting that of ABS and Polypropylene, although many other behaviours can be accurately replicated. RIM parts are fully paintable and exhibit isotropic characteristics allowing for predictable geometry.

By utilizing a range of advanced material technologies we’re able to make cost effective moulds suitable for individual or small runs of parts. Many of our clients appreciate the ability to produce evaluation models exhibiting end-product characteristics whilst maintaining the flexibility of rapid design iterations. Revised moulds can be produced in under 24 hours allowing for an uninterrupted prototype workflow.

Batch production RIM components

When larger production quantities are required, our engineers will elect to manufacture tooling from more resilient moulding materials which permit multiple components to be made whilst maintaining stringent dimensional tolerances. Certain applications allow for multiple mould cavities to be integrated into an array which streamlines production by moulding a number of components simultaneously.

Mould master forms

Master forms are manufactured to exacting tolerances by combining modern manufacturing techniques achieving superb surface geometry and longevity. Materials are selected on application and forms range in size from 1mm up to 2.4m in length with larger patterns available on request.

Vacuum & composite layup forms

Typically machined from PU or Epoxy Toolboard – vacuum forms can take on a range of complex geometry including hard angles and contoured organic surfaces. Forms are CNC machined to exacting tolerances and hand finished to defined specifications. High wear areas can be supplemented with machined Aluminium or Steel inserts, prolonging tool life whilst lowering overall pattern costs. Moulds can be manufactured from materials allowing for hundreds of parts to be made before reaching the end of their service life, whilst softer materials can be used where only a few parts require production.

Aluminium & Steel mould cavities

Used regularly in RIM components and for more stringently toleranced parts requiring higher production cycles – we CNC machine moulds from harder materials such as Aluminium & Steel allowing for far greater service life.