CLOSING UNIT FOR INJECTION MOULDING MACHINE

A closing unit for an injection moulding machine has a movable closing die (20) and a fixed matching die (14), as well as several hydraulic cylinders (26) mounted on the fixed matching die (14) to generate the closing force. The closing die (20) has a drawbar (22) for each hydraulic cylinder (26). T...

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Bibliographische Detailangaben
Hauptverfasser:	MAILLIET, PIERRE (DECEASED), LANFERMANN, BERND
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	A closing unit for an injection moulding machine has a movable closing die (20) and a fixed matching die (14), as well as several hydraulic cylinders (26) mounted on the fixed matching die (14) to generate the closing force. The closing die (20) has a drawbar (22) for each hydraulic cylinder (26). The piston (28) of each hydraulic cylinder (26) is mechanically linked to a rotary locking bushing (34). The drawbars (22) extend through hydraulic cylinders (26) and locking bushings (34). A servo-drive (70) allows the locking bushings (34) to swivel up to a first and second angular position. First locking means (38) located along a section of the drawbars (22) co-operate with second locking means (36) in the locking bushings (34) so that in the first angular position the drawbars (22) may be axially pushed through the hydraulic cylinders (26) and the locking bushings (34), and in the second angular position the closing force may be transmitted from the hydraulic cylinders (26) to the closing die (20).