Resin transfer mouldingRTM

A variant of resin transfer moulding in which resin is drawn into dry reinforcement under vacuum, typically with a rigid mould face on one side and a flexible film or light shell on the other. The term is often used interchangeably with resin infusion, particularly in North American literature.

A moulding process in which a charge of material, such as sheet moulding compound or a preheated thermoplastic blank, is placed in a heated matched metal mould and formed under press pressure. It offers short cycle times and good surface finish and is widely used for automotive panels and electrical components.

A high-volume process in which molten polymer, often short-fibre reinforced, is injected under high pressure into a closed metal mould, solidified and ejected. It provides tight tolerances and complex geometry at low unit cost once tooling costs are recovered.