Pressure moulding machines and mould parts therefor

Details Pressure moulding machines and mould parts therefor Pressure moulding machines and mould parts therefor

1975-12-03

1977-12-20

Baldwin, Robert D.

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

With means to cause relative movement between mold and charger

164303, 425567, 425590, B29F 102

Patent

active

040638693

ABSTRACT:
In a pressure moulding machine, particularly a die casting machine, detection of locking together of the die parts by the applied pressure is effected by detecting the resulting mechanical stretch in the machine frame; the die parts are opened and closed together by an air motor associated with a hydraulic motor that damps the opening and closing movement of the dies, the die parts being locked together by the hydraulic motor; full closing of the die parts is determined by applying pressurized air to bores therein and to a controlling pressure switch, the pressure switch not being operable if air is leaking from the bores.

REFERENCES:
patent: 1491173 (1924-04-01), Schwartz
patent: 2004959 (1935-06-01), Morin et al.
patent: 2947045 (1960-08-01), Goldhamer
patent: 3071813 (1953-01-01), Lemoine
patent: 3310842 (1967-03-01), Fischbach
patent: 3319702 (1967-05-01), Hartwig et al.
patent: 3388429 (1968-06-01), Barnett et al.
patent: 3538549 (1970-11-01), Hehl
patent: 3583467 (1969-05-01), Bennett
patent: 3677680 (1972-07-01), Etherington
patent: 3830614 (1974-08-01), Kurtz

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