Press with die cushion gas monitor

Details Press with die cushion gas monitor Press with die cushion gas monitor

1990-01-19

1991-04-16

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Control means responsive to or actuated by means sensing or...

Means responsive to abnormal condition completely stop...

7245313, 100 53, 100 99, 425151, 425162, 425169, 425406, B30B 1514, B30B 1528

Patent

active

050078178

ABSTRACT:
A press that includes a pair of die sections and a ram for propelling one of the die sections against the other to form a workpiece positioned therebetween. A die cushion is coupled to one of the die sections for cushioning force of engagement of the die sections, and includes at least one gas cylinder and a manifold for feeding gas under pressure to the cylinder. A pressure monitor includes a pressure sensor coupled to the manifold for supplying an electrical pressure signal as a function of gas pressure in the manifold. The pressure signal as compared to a predetermined threshold for supplying an alarm signal when gas pressure in the manifold is less than such threshold, and ram operation is stopped when the manifold gas pressure is less than the preset threshold.

REFERENCES:
patent: 4062914 (1977-12-01), Hinzpeter
patent: 4635466 (1987-01-01), Seki et al.
patent: 4669298 (1987-06-01), Kono et al.
patent: 4939918 (1990-07-01), Schoch

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