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 Reaction
injection molding (RIM) is a molding process to manufacture plastic
molded parts. Polyolefin and Isocyanides (as well as some other
ingredients) are mixed in a mixing device in a fluid state and then
injected as a liquid mass into a mold. The solidification of the liquid
mass occurs in the mold as the mixed liquids react with the heated
surface of the tool surface. The advantage of this process is a low
clamping force needed for the mold, long material travel paths and the
low pressure conditions of the molding process. The necessary molds can
be manufactured quickly and cost effectively using aluminium. Molded
parts produced in the RIM process compete with parts from injection
molding, thermo forming and fibreglass lay up. The liquid masses of the
RIM process have a more advantageous flow behaviour in comparison to
injection molding due to the low viscosity of the material since they
are not a thermo plastic. Therefore, much longer flow paths can be
achieved with the same wall thickness than other traditional molding
processes..
Thieme has been producing RIM plastic parts for more than 30 years. Over
4000 different customer-specific parts have been realized by Thieme.
More information about RIM (Reaction Injection Molding)
here
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