Die set having sealed compliant member

Details Die set having sealed compliant member Die set having sealed compliant member

2008-01-22

2008-01-22

Gupta, Yogendra N. (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

Preform reshaping or resizing means: or vulcanizing means...

By fluid pressure actuated flexible diaphragm

C425S389000, C425S405100, C425S411000, C425S444000, C101S016000

Reexamination Certificate

active

07320584

ABSTRACT:
A press system that reduces contamination of workpieces and/or compliant members used in die assemblies of the press from the pressing process. The die assemblies may utilize annular or hole-less stampers in which the compliant member is sealed in the die assembly. The compliant member may have be annular having a cavity at approximately its center. A gap may be generated at the cavity of the compliant member between a constraint member and the stamper. The gap, for example, may be filled with a plug to prevent significant distortion of the stamper over a hole of a disk shaped workpiece due to the pressure induced force generated by the press system. An outer diameter ring surrounding a workpiece may be used to prevent collapse of the stampers outside the diameter of the workpiece to insure uniform pressing out to the outer diameter of the workpiece.

REFERENCES:
patent: 4266921 (1981-05-01), Murray
patent: 5213600 (1993-05-01), Greschner et al.
patent: 5786003 (1998-07-01), Debbia
patent: 6030576 (2000-02-01), Cassani
patent: 6165391 (2000-12-01), Vedamuttu
patent: 6482742 (2002-11-01), Chou
patent: 2002/0000518 (2002-01-01), Oudshoorn et al.
patent: WO 03/090985 (2003-11-01), None

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