Reaction Injection Molding

Reaction Injection Molding (RIM) is a process for forming products such as automotive panels, turbine housings, and anything requiring a high strength to weight ratio. The process is similar to injection molding, but uses thermosetting polymers which require a curing reaction within the mold. The mixture is injected into a mold under high pressure with an impinging mixer, then allowed to remain in the mold long enough to expand and cure.