Question

Explain mechanical expression device of screw press?​

Answer 1

Answer:

A screw press is a type of machine press in which the ram is driven up and down by a screw. A press for metalworking is a machine tool used to shape or cut metal by deforming it with a die. It is frequently used to punch holes in sheet metal in one operation, rather than by cutting the hole or drilling.

The screw press, probably invented in Greece in the 1st or 2nd century bc, has been used since the days of the Roman Empire for pressing clothes. In the 1st century ad, wooden screws were used in wine and olive-oil presses, and cutters (taps) for cutting internal threads were in use.