Method for making hollow workpieces

Details Method for making hollow workpieces Method for making hollow workpieces

1995-11-03

1999-01-26

Arbes, Carl J.

Metal working

Method of mechanical manufacture

Combined manufacture including applying or shaping of fluent...

29 33C, 295275, 72349, 164481, B21B 146

Patent

active

058625828

ABSTRACT:
A method for making hollow workpieces such as beverage containers with a circular die in which an aluminum alloy is strip cast whereby the alloy is solidified rapidly without substantial precipitation. Thereafter, the aluminum alloy is formed into a cup which is drawn and passed through one or more dies to iron the walls of the cup and thereby lengthen the side walls thereof using at least one circular die having a die angle of less than about 6.degree.. It has been found that the use of such small die angles prevents or minimizes galling and tearoffs.

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