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Transfer moulding differs from compression moulding in that the charge is

  • A.cooled before the mould is closed
  • B.cured outside the mould and then shaped
  • C.plasticised in a separate chamber and injected
  • D.placed directly in the mould cavity

Answer: C

Correct answer: plasticised in a separate chamber and injected

In compression moulding the charge is placed in the open cavity and the mould closes on it. In transfer moulding it is softened in a separate pot and then forced through runners into a closed cavity, which gives better dimensional control, permits thin sections and delicate inserts, and reduces flash. Both cure a thermoset in a heated mould; only the way the material reaches the cavity differs.

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