Can tooling components

Details Can tooling components Can tooling components

1992-09-04

1995-03-14

Larson, Lowell A.

Metal deforming

By use of closed-die and coacting work-forcer

Cup or shell drawing

72467, 413 69, B21D 2228, B21C 302

Patent

active

053967887

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
Vinod Sharma, Kenneth S. Vecchio, and S. Nemat-Nasser, "Damage Evolution in Silicon Nitride Under Repeated Dynamic Loading", 1991, paper presented at the Proceedings of the 49th Annual Meeting of the Electron Microscopy Society of America, 2 pages.

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