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Plastic Moulding - Transfer Moulding

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Transfer Molding involves having a "piston and cylinder"-like device built into the mould so that the rubber may be squirted into the cavity through small holes.

A piece of uncured rubber is placed into a portion of the heated mould called the "pot." The plunger (on the top-most part of the mould) fits snugly into the "pot”. The mould is then closed up and under hydraulic pressure the rubber is forced through the small hole (the "gate") into the cavity. The mould is held closed while the rubber cures. The plunger is raised up and the "transfer pad" material may be removed and thrown away. Mould is opened and the part can be removed. The flash and the gate may need to be trimmed.

Advantages of Transfer Molding

  • Provides more product consistency than compression molding
  • Cycle times are shorter than compression molding
  • Better than compression molding for rubber-to-metal bonding

Disadvantages of Transfer Molding

  • The transfer pad is scrap
  • Product consistency is poorer than injection moulding
  • Cycle time is longer than injection molding

Transfer molding can be used to mould rubber or elastomer parts such as rubber boots and seals which can be extremely small.


Suppliers With This Capability

Romar Engineering
  Sefton NSW
0 out of 50 out of 50 out of 50 out of 50 out of 5

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