Hydraulic vulcanizing press

Details Hydraulic vulcanizing press Hydraulic vulcanizing press

1983-06-24

1984-05-22

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

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

Molding pressure control means responsive to pressure at...

425151, B30B 1522, B30B 1500

Patent

active

044499175

ABSTRACT:
For the purpose of pressurizing and holding the pressure in a pressurizing hydraulic cylinder is a hydraulic vulcanizing press, a pneumatic booster (more particularly, a pneumatically operated hydraulic pressure booster) for supplying a desired hydraulic pressure to the hydraulic cylinder is provided in a hydraulic circuit on a pressurizing actuation side of the pressurizing hydraulic cylinder. In addition, in the pneumatic input circuit for the pneumatic booster is provided a switching device for switching a pressurized air fed to the pneumatic booster between a high pressure air for boosting a hydraulic pressure to a desired hydraulic pressure and a low pressure air for holding the desired hydraulic pressure after the desired hydraulic pressure has been attained.

REFERENCES:
patent: 2449257 (1948-09-01), Tucker
patent: 2552458 (1951-05-01), Reiskind et al.
patent: 3509600 (1970-05-01), Noble
patent: 3635622 (1972-01-01), Wechsler
patent: 3642401 (1972-02-01), Wilson
patent: 3667884 (1972-06-01), Reinfeld
patent: 3728057 (1973-04-01), Grundmann et al.
patent: 3734659 (1973-05-01), Harris

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