Reaction Injection RIM Molding Example

Exothermic Molding, Inc. is a full-service manufacturer of custom plastic parts using Reaction Injection Molding technology. With an on-site machine shop, Exothermic Molding can create custom molds to duplicate fiberglass, urethane, polyurethane, thermoplastic, composite, and metal parts for use in medical, electronics, instrument, and other commercial and industrial uses.

Reaction Injection Molding (RIM) is a thermoset process where two liquid chemicals are mixed immediately before injection into the mold. A low pressure, low temperature, chemical reaction takes place in the mold producing a polyurethane part.

What are the benefits of the RIM Molding process?
  • Very large parts can be molded economically
  • Thick and thin walls can be produced
  • Low cost and short lead time tooling
  • Excellent encapsulation capabilities
  • Composite construction using fibers
  • Excellent surface reproducibility and finish
  • Good physical properties including UL94VO
Exothermic Molding can help by:
  • Designing your part for low cost reaction injection molding
  • Making low cost tooling quickly
  • Molding the part
  • Assembling, painting, silk screening, packing and shipping
 Reaction Injection RIM Molding Design Guide
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Reaction Injection RIM Molding Example

Exothermic Molding is ISO 9002 compliant and has been producing RIM molded parts since 1970.