Plastic article or earthenware shaping or treating: apparatus – Mold opening and closing means and segmented female mold – Varying pressure and/or speed closing
Patent
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.
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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
Flint, Jr. J. Howard
Krauss-Maffei Aktiengesellschaft
Ross Karl F.
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