What is Compression Molding? Compression molding is the process where a heated rubber material is placed in one side of a mold, then the other side of the mold is clamped down, and the rubber material is compressed into the desired shape. The mold must also be heated, as the combined compression and heat is what causes the rubber to take its new shape. The mold also has to be designed to meet certain accommodations. For example, the mold needs…