Borke Mold Specialists: Mastering the Craft of Compression Molding

In the realm of thermosetting plastic part production, compression molding stands as a venerable and widely embraced technique. The process hinges on the utilization of compression molding machines, comprising platens to which the two halves of a mold are affixed. The raw material, christened as a “charge,” forms the basis of this procedure.

The orchestration unfolds as follows:

  • A precisely measured charge, whether in liquid, pellet, or powder form, undergoes heating and is subsequently deposited into the lower half of the mold.
  • Both mold halves undergo preheating in preparation for the critical step.
  • Assisted by a hydraulic system, the mold securely closes, thereby shaping the material to mirror the mold cavity.
  • A period of rest follows, enabling polymerization to occur. This process transmutes the raw material into the durable, solid end product.
  • Subsequently, the mold is unsealed, and the finished part is extracted.

Materials for Compression Molding: While compression molding primarily caters to thermosetting polymers, its versatility extends to encompass elastomers, certain composites, and a restricted array of thermoplastics.

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