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:
Jun. 26, 2001
Filed:
Apr. 28, 1998
Pierre Mailliet, late of Redange, LU;
Bernd Lanfermann, Rees, DE;
Abstract
A closing unit for an injection moulding machine has a movable closing die and a fixed matching die, as well as several hydraulic cylinders mounted on the fixed matching die to generate the closing force. The closing die has a drawbar for each hydraulic cylinder. The piston of each hydraulic cylinder is mechanically linked to a rotary locking bushing. The drawbars extend through hydraulic cylinders and locking bushings. A servo-drive allows the locking bushings to swivel up to a first and second angular position. First locking elements located along a section of the drawbars cooperate with second locking elements in the locking bushings so that in the first angular position the drawbars may be axially pushed through the hydraulic cylinders and the locking bushings, and in the second angular position the closing force may be transmitted from the hydraulic cylinders to the closing die.