What is Reaction Injection Moulding?
Reaction Injection Moulding (RIM) is a manufacturing process used to create lightweight, durable plastic parts by injecting two reactive liquid components into a mould, where they chemically react and cure into a solid shape.
The process involves mixing two low-viscosity liquids—typically a polyol and an isocyanate—which are then injected at low pressure into a closed mould. Inside the mould, the materials chemically react and expand, quickly forming the final part. Once cured, the mould opens, and the part is removed, ready for finishing.
RIM is commonly used for:
- Automotive body panels.
- Housings & enclosures.
