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+(351) 212 071 267Email:
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Mon - Fri: 08:30H - 13:00H 14:00H - 17:30HReaction Injection Moulding (RIM) was developed in Europe by Bayer AG in the late 1960s as an alternative to thermoplastic injection moulding. Unlike traditional methods, which use melted plastic pellets pressed into a steel mould under high temperature and pressure, RIM involves the mixing of two low-viscosity liquids—an isocyanate and a polyol—and injecting them into a lightweight aluminium mould under low pressure and temperature.
Within the mould, these liquids undergo an exothermic chemical reaction, generating heat and polymerizing into polyurethane. This lower-viscosity mixture requires less clamping force, resulting in smaller equipment and ultimately reducing the capital expenditures associated with moulding. Another advantage of RIM is that it forms a high-density skin with a lower-density core, creating durable and robust parts.
For many years, Reaction Injection Moulding has seen widespread application in Europe and the American automotive industry, where it is used extensively for both interior and exterior body components. As more industrial designers have recognized the design flexibility that RIM offers, its applications have expanded into other industries, including medical equipment and electronics enclosures.