Transfer molding can be seen as a combination of compression and injection molding and is great for high-quantity rubber molding needs. This process also allows for metal inserts and other custom options to meet specific needs. In addition to compression and injection molding, transfer molding is a great option to have when considering your manufacturing options. Be sure to talk with your support team at Vip Rubber and Plastic if you need assistance deciding which process is best for your part.

Process of Transfer Molding

A. Uncured rubber is preformed by our team into the specific amount needed for your part

B. The preformed rubber is placed into a portion of the mold (not directly in the cavity)

C. The mold is closed and placed under pressure

D. The rubber is then pushed through a small opening (sprue) where it will fill the cavities

E. The mold remains closed, heated, and under pressure, while the parts cure

F. When ready, the mold is released and parts are removed

G. The process is ready to begin again

H. Excess flash is trimmed by hand or parts are placed in the cryogenic deflasher

Advantages of Transfer Molding

  • Lower Cost Molds
  • Great For Complex Molded Parts
  • Able To Hold Tight Tolerances
  • Reduced Flash
  • Good Part Repeatability On Future Orders

Disadvantages of Transfer Molding

  • Increased need for mold maintenance
  • Costly Initial Mold Start Up Cost
  • Best For Long-Term Jobs
  • Some Material Waste

Ready to see if transfer molding is right for your job? Contact us today.