Explanation of terms:
RIM: Reaction Injection Moulding:
It is a variation of the basic injection moulding process
involving high pressure impingement (impact) mixing of two or more reactive
thermoplastic or thermoset liquid component (either cold or warm) in a mixing
head. After mixing, the liquid stream is injected into a closed, warm mould, at
low pressure, where the reaction continues and the mixture solidifies. The finished
parts can be cellular or solid elastomer, with a wide range of hardness and
modulus.
LIM: Liquid Injection Moulding:
It is another term used for the same process – RIM
HPIM: High Pressure Impingement Mixing:
It is used especially with urethanes, which is a
most important one in the overall moulding process.
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