RIM Process

RIM is a process where two liquid materials, polyol resin and isocyanate are brought together in a mix head and injected into one or more cavities and allowed to cure to a specific shape. In what applications should the rim process by considered? Elastomers and structural foams are found throughout industry and in the private sector. The reaction injection process is used for a variety of parts ranging from bumpers for buses to cases for medical equipment, for automotive interior door panels and is also used in making bowling balls. Parts weighing several pounds and up are well suited for the rim process.

Depending on the choice of materials, the finished part can be as soft as a sponge or as hard as cement. The choice of mold material (steel or aluminum vs. epoxy) and surface finish of the mold cavity regulates the final surface finish on the part. Molded parts can be used as they come from the mold or post painted. Each application should be reviewed and recommendations made after careful consideration of the particular requirements of the finished part.

Our Capabilities The fact that we do not restrict ourselves to one particular type of material sets RIM apart from most other "job shop" reaction injection molders. We offer our customers the following material selections:

Structural Foams rigid, but light weight foam. Examples of parts are spoilers, speaker housings, computer housings, instrument and equipment housing.

Flexible Foams Soft feel. Examples of parts are seating, armrests, headrests, packaging, door panels, dashes, and toys.

Elastomers From soft and pliable to rigid and very tough. Very versatile material. Examples are vehicle fenders and body panels, lawn care and sport implement hoods, tires and tracks, rollers, seals, belts, glass encapsulation, aftermarket restyling packages.

RIM's primary chemical supplier is Bayer MaterialScience. Bayer has a large selection of materials to fit most applications.

RIM personnel are flexible in working with our customer to meet their prototyping and short run production needs.