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A body that is too stiff for extrusion is usually corrected by

  • A.increasing the water content slightly
  • B.raising the extrusion pressure sharply
  • C.reducing the size of the die opening
  • D.cooling the body before it enters

Answer: A

Correct answer: increasing the water content slightly

Water is what makes the body plastic, so a stiff body wants a little more of it. Raising the pressure instead forces a body that will not flow properly and produces laminations and die wear, and a smaller die makes the problem worse rather than better.

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