Material handling equipment may be done manually when the punches moves up on the return stroke, the strip is raised enough to clear the pin and allow the strip to advance to the next position. The operator must apply pressure on the strip in the direction of feed.
Manual feeding is satisfactory for low production or with presses having a low stroke-per-minute capability, but modern presses as a rule operate at 200 to 300 strokes per minute, with exceptions running at 500 strokes per minute and over.
Automatic feeding devices are the answer to high speed press production. They enable steel mills to prepare strip in large coils especially for use with punch presses.
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