Q.

How does the piston in the clamping unit move?

A. hydraulic energy
B. pneumatic energy
C. heat energy
D. suction
Answer» A. hydraulic energy
Explanation: there is a clamping unit employed for holding the two halves together and for the opening and closing of the mold. a moving piston is provided which operates the power press. this piston works on hydraulic energy.
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