Device for limiting the pressing force to a pre-established valu

Details Device for limiting the pressing force to a pre-established valu Device for limiting the pressing force to a pre-established valu

1974-02-11

1976-02-17

Spicer, Jr., Robert L.

Plastic article or earthenware shaping or treating: apparatus

Means for molding powdered metal

425406, B29C 300

Patent

active

039389200

ABSTRACT:
The specification describes a device for limiting the pressing force to a pre-established value in mechanical presses with an upper punch, which is mounted on the upper tup via a hydraulic cushion, which is connected via an overpressure valve and a pump with a pressure medium supply held in a pressureless condition. At the connection between the hydraulic cushion and the excess pressure valve, a duct is connected which opens in a pressureless manner and this duct is closed by valve whose closing pressure can be adjusted.

REFERENCES:
patent: 2805447 (1957-09-01), Voges
patent: 3202737 (1965-08-01), Isuda

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