DCPD Reaction Injection Molding (RIM) Proces

DCPD Reaction Injection Molding (RIM) Process

DCPD Molding Process IllustrationThermoset DCPD RIM (Reaction Injection Molding) involves a closed tool, low PPM moisture and low PPM oxygen environment.  It is similar to injection molding except thermosetting polymers are used (dicyclopentadiene), which requires curing in the mold. If reinforcing agents (commonly glass fibers or mica) are added, then the process is called reinforced reaction injection molding (RRIM).

A subset of RIM is structural reaction injection molding (SRIM), which uses fiber meshes for the reinforcing agent. The fiber mesh is arranged in the mold and the polymer mixture is injection molded over it.

DCPD RIM can produce strong, flexible, lightweight parts that are easily painted. The bi-component mixture injected into the mold has a much lower viscosity than molten thermoplastic polymers, therefore large, light-weight and thin-walled items can be successfully produced with DCPD RIM.

Common items made with the DCPD RIM include automotive bumpers, air spoilers and fenders.

  • Accommodates highly dimensional parts with a range of wall thicknesses
  • Excellent molded surfaces suitable for Class A painted finishes, good adhesion
  • Lightweight, impact-resistant parts with excellent stiffness and physical properties
  • Easily machined
  • Finished parts will have high impact strength and toughness
  • Based on volume, tooling can be composite, nickel shell, mass cast or aluminum
  • In the range of 200 to 10,000 parts per year*

* Volume recommendations are averages and provided only as a general guideline.  Actual volume efficiencies are a more complex matter requiring detailed statistics about the part to be manufactured.

Resource Typesort descending Description
Mass Reduction With Value-Engineered Composites PDF Guidance for light-weighting (mass reduction) of products using advanced composite materials.
Technical Design Guide for FRP Composite Products and Parts PDF Fiberglass (FRP) composite materials and processes are explained in detail. This design guide outlines various selection criteria with helpful technical data and comparisons to alternative materials.
Guide for Selecting Best FRP Composite Process PDF Guidelines for Selecting the Best FRP Composite Process for Your Project

Snapshot Guide: Shapes, Uses and Considerations

Lightweight and extremely tough. Smooth, paintable surface, excellent fatigue life.