Compression Molding

Compression Molding is one of three processes used to mold rubber parts. Compression molding is the oldest and simplest way to make rubber products. In some specific applications, compression molding is still the best way.

To put it simply, compression molding involves squishing a chunk of uncured rubber into a pocket in the mold. After time, heat and pressure the rubber cures in the shape of the pocket. The mold can then be opened and the part removed.

Compression Molded Parts

  • Advantages of Compression Molding
    -Lowest cost molds.
    -Little "throw away"material provides advantage on expensive compounds.
    -Often better for large parts.

  • Disadvantages of Compression Molding
    -Offers least product consistency.
    -Difficult to control flash.
    -Not suited for some types of parts.