Reaction Injection Molding (RIM) technology is widely used in the manufacturing of low-volume, large plastic parts (machinery covers, medical devices covers, etc.) in a variety of formulations and densities, using polyurethane as the material.
The process involves the injection of two compounds – polyol and isocyanate – that react with each other to form polyurethane. Polyurethane-curing chemical reactions that occur inside a RIM mold normally take place at low temperatures and pressures, comparable with the conditions of plastic Injection Molding. These low-pressure and -temperature working parameters make HP Multi Jet Fusion (MJF) materials very suitable for RIM mold manufacturing.