Press molder and cushion ring

Details Press molder and cushion ring Press molder and cushion ring

2005-07-22

2009-06-02

Gupta, Yogendra (Department: 1791)

Plastic article or earthenware shaping or treating: apparatus

Distinct means to feed, support or manipulate preform stock...

And means to form or reshape preform

C425S125000, C425S193000, C425S344000, C425S352000, C425S468000

Reexamination Certificate

active

07540734

ABSTRACT:
The problem of a conventional press molder is insufficient rigidity of an annular cushion ring receiving inward force, which cannot prevent a lower portion of the cushion ring from deforming, i.e., bending and expanding outward. A press molder (1) according to the present invention comprises a die (2), a punch (3) and a cushion ring (5). The cushion ring (5) has a rib (51) which is a reinforcing structure so as to be prevented from being bent at the time of press molding, and the punch (3) is formed therein with a recess (31) which is a reinforcing structure a escape part so as to prevent the punch3from interfering with the rib (51) of the cushion ring (5).

REFERENCES:
patent: 2707307 (1955-05-01), Brumbach
patent: 3611517 (1971-10-01), Giersberg et al.
patent: 4534725 (1985-08-01), Hemmelgarn et al.
patent: 6648624 (2003-11-01), Foor et al.
patent: 07-051796 (1995-02-01), None
patent: 2002-086219 (2002-03-01), None
patent: 2002-219528 (2002-08-01), None
patent: 2002-219529 (2002-08-01), None

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