Metal deforming – By use of closed-die and coacting work-forcer – Cup or shell drawing
Patent
1995-03-13
1995-12-26
Larson, Lowell A.
Metal deforming
By use of closed-die and coacting work-forcer
Cup or shell drawing
72462, B21D 2228
Patent
active
054777224
ABSTRACT:
The present invention relates to improved materials for fabricating can bodies. In particular, the present invention relates to can tooling components fabricated from whisker-reinforced silicon nitride having from about 5 to about 15 weight percent whiskers with an average diameter of at least about 0.75 micrometers. The material preferably has a thermal expansion coefficient of less than about 3.5.times.10.sup.-6 per .degree.C. and a friction coefficient of from about 0.20 to about 0.24. The present invention also provides a method for reducing the trim height of can bodies formed using a can tooling apparatus.
REFERENCES:
patent: 4777822 (1988-10-01), Uemura et al.
patent: 5095730 (1992-03-01), Lauder
patent: 5396788 (1995-03-01), Dziedzic et al.
Dziedzic Chester J.
Ezis Andre
Talbott Roblee L.
Golden Technologies Company, Inc.
Larson Lowell A.
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