Plastic article or earthenware shaping or treating: apparatus – Mold opening and closing means and segmented female mold
Patent
1990-05-17
1991-05-28
Hoag, Willard E.
Plastic article or earthenware shaping or treating: apparatus
Mold opening and closing means and segmented female mold
100269R, 100269B, 100273, 425810, B29C 4567
Patent
active
050189611
ABSTRACT:
A hydraulic closing unit, particularly for injection molding machines which process plastics material. The closing unit includes a mold clamping plate which is slidably guided on guide columns between a stationary support plate and a stationary mold clamping plate. An annular main piston acts on the slidable mold clamping plate with a high mold closing force in mold closing direction. The main piston is axially slidably guided in the stationary support plate and load can be applied to both sides of the main piston. At least two coupling planes are provided between the main piston and the central pressure column. The coupling planes are mounted spaced apart and one behind the other in sliding direction of the slidable mold clamping plate. The main piston and the pressure column are slidable relative to each other over the distance range between the coupling planes. Coupling elements of the main piston and of the pressure column can be placed in and out of supporting engagement only in the region of each coupling plane.
REFERENCES:
patent: 3677685 (1972-07-01), Aoki
patent: 3697212 (1972-10-01), Herbst
patent: 4565116 (1986-01-01), Hehl
patent: 4599063 (1986-07-01), Gutjahr
patent: 4636167 (1987-01-01), Shibata
patent: 4890998 (1990-01-01), Grabener et al.
Mai Ernst
Miese Manfred
Battenfeld GmbH
Hoag Willard E.
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