The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 28, 1991
Filed:
May. 17, 1990
Manfred Miese, Ettlingen, DE;
Ernst Mai, Riesweiler, DE;
Battenfeld GmbH, , DE;
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.