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

1977-08-09

Spicer, Jr., Robert L.

Plastic article or earthenware shaping or treating: apparatus

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

Feed control of material en route to shaping area

425166, 425171, B29F 100

Patent

active

040407764

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: 2838140 (1958-06-01), Rasmusson et al.
patent: 3176801 (1965-04-01), Huff
patent: 3632251 (1972-01-01), Henry
patent: 3642405 (1972-02-01), Eggenberger et al.
patent: 3647309 (1972-03-01), Thompson
patent: 3840313 (1974-10-01), Grundmann
patent: 3897680 (1975-08-01), Grundman et al.

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