Compression molding is a process used to make stock shape materials that are both thermoplastic and thermoset. It is achieved by placing a plastic material in a mold cavity that is formed through adding heat and pressure. These two in combination force the materials into the mold. The cycle of heat and pressure hardens the material and it can then be removed from the mold.

Thermoset BMC compression molds

Plastic part: Industrial switch of EATON brand

Part material: Bulk Molding Compound(BMC); thermosetting plastics