RIM

(Reaction Injection Molding)

 

 

 

Large Complex Shapes               Structural and Aesthetic                                 Pleasing Curved Surfaces

 

 

What is RIM?

 

Polyurethane reaction injection molding (RIM) technology was developed in the late 1960s.  Like thermoplastic injection molding, RIM is a plastics-forming process that uses molds to form parts. However, the similarity ends there.  It is helpful to view RIM not as a specific resin with narrowly defined properties, but as a process capable of achieving a broad range of properties. As its name implies, the polyurethane RIM process uses polyurethanes to produce molded parts. The polyurethanes begin as two liquid components, compared with the pellet form of most thermoplastics. These liquid components - an isocyanate and a polyol - are developed in two-part formulations, which are often called polyurethane RIM systems.

                     

Inserts                             Rim Overmold – Metal Casting                                             Multi-Densities

 

                       

               

        Curvaceous                          Encapsulated                      Multi-Densities                  Weather Sealed                 Very Large

 

Depending on how the polyurethane RIM system is formulated, the parts molded with it can be a foam or a solid, and they can vary from flexible to extremely rigid. Thus, polyurethane RIM processing can produce virtually anything from a very flexible foam-core part to a rigid solid part. Part density can vary widely, too, with specific gravities ranging from 0.2 to 1.6.

Molds can be resin, spray metal, cast aluminum or machined aluminum.

 

 

Very Complex Shapes with Multiple Inserts – Low Vlumes

 

 

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