Clamping mechanism for an injection molding machine

Details Clamping mechanism for an injection molding machine Clamping mechanism for an injection molding machine

2006-09-26

2006-09-26

Mackey, James P. (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

With means to close mold

C425S595000, C425S451700

Reexamination Certificate

active

07112058

ABSTRACT:
A clamping mechanism for a clamping unit of an injection molding machine includes a drive unit which moves a first platen linearly relative to a fixed second platen and is linked to the first platen for limited movement. A force-application unit builds up a clamping force, when the first platen assumes a closing position. Disposed between the force application unit and the first platen is a locking device which transmits the clamping force and includes a screw mechanism which operates in synchronism with the drive unit and has a screw shaft and a locking nut constructed to normally connect with clearance to the screw shaft via a thread connection and to interact with the screw shaft for transmitting a load, when the clamping force is applied, whereby the threaded connection is forced to self-lock to secure the locking nut on the screw shaft and prevent reverse rotation of the locking nut.

REFERENCES:
patent: 3191235 (1965-06-01), Rougement
patent: 3604058 (1971-09-01), Fischbach
patent: 3704973 (1972-12-01), Renfrew et al.
patent: 4984980 (1991-01-01), Ueno
patent: 2004/0091570 (2004-05-01), Wohlrab et al.
patent: 101 03 983 (2002-04-01), None

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