Mold-closing device for an injection-molding machine

Details Mold-closing device for an injection-molding machine Mold-closing device for an injection-molding machine

1979-12-03

1981-02-10

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

Mold opening and closing means and segmented female mold

Varying pressure and/or speed closing

425590, B29F 106

Patent

active

042498805

ABSTRACT:
A mold-closing device for an injection-molding machine has a main piston connected to the mold-carrying plate of a movable mold half and is provided with a pressure-multiplying piston which closes a passage between sides of the main piston to render effective the differential action of the multiplier piston. The multiplier piston can be shifted prior to the main piston by a time-delay device in the pressure lines and/or by a mechanical element.

REFERENCES:
patent: 3263277 (1966-08-01), Ohlendorf et al.
patent: 3270372 (1966-09-01), Hesse
patent: 3677685 (1972-07-01), Aoki
patent: 4013392 (1977-03-01), Smith
patent: 4017236 (1977-04-01), Penkman et al.
patent: 4032277 (1977-06-01), Linde et al.
patent: 4158327 (1979-06-01), Aoki

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