Plastic article or earthenware shaping or treating: apparatus – With apparatus assembly or dismantling means or with idle part – For extrusion or injection type shaping means
Reexamination Certificate
2006-12-21
2009-02-17
Mackey, James (Department: 1791)
Plastic article or earthenware shaping or treating: apparatus
With apparatus assembly or dismantling means or with idle part
For extrusion or injection type shaping means
C425S451700, C425S593000, C425S595000
Reexamination Certificate
active
07491050
ABSTRACT:
A mold clamping unit includes a mold height adjustment system having a length-adjustable threaded connection, comprised of a threaded spindle and a spindle nut which supports a platen of a molding tool, for stroke transmission and transmitting a locking force in clamping position. A clamping mechanism, which locks the spindle nut in relation to the threaded spindle and is selectively releasable for length adjustment of the threaded connection, includes a clamping nut, connected in fixed rotative engagement with and coupled for slight axial displacement in relation to the spindle nut, and an actuator, switchable between an active position, in which the spindle nut is braced with the clamping nut by a tightening force so that the platen is urged against the spindle nut, and an idle position, in which the actuator is released and which can be implemented irrespective of a stroke position of the drive mechanism. The threaded spindle and the platen are coupled to each other directly via the spindle nut for transmitting the clamping and locking forces, and via the actuator for transmitting an opening force in opposition to the clamping force.
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Dieno Kurt
Kübel Andreas
Day Ursula B.
Demag Ergotech Gmbh
Feiereisen Henry M.
Mackey James
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