B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
113/78
B21D 45/04 (2006.01) B21J 13/14 (2006.01)
Patent
CA 1159721
GAl-3P-6517 WORKPIECE EJECTOR SYSTEM FOR PRESSES Abstract of the Disclosure An improved workpiece ejecting system for presses in- cludes an ejector piston hydraulically driven in response to reciprocation of the press slide in a manner whereby the motion of displacement of the ejector piston corresponds to the motion of displacement of the press slide during the stroke thereof, and the extent of displacement and velocity of the ejector piston are proportional to the corresponding charac- teristics of the slide. Ejector piston displacement is achieved by the flow of hydraulic fluid to and from the ejector piston chamber during reciprocation of the press slide through its total stroke. Ejector pins of various lengths are selectively associated with the press tooling and ejector piston to pro- vide for varying the length of the workpiece ejecting stroke. Displacement of the ejector piston in the ejecting direction can be stopped prior to the slide reaching the end of its return stroke to provide a dwell in elector pin displacement to facilitate workpiece feeding and removal with respect to the press tooling.
388431
Gowling Lafleur Henderson Llp
Gulf & Western Manufacturing Company
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