초록 ▼

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

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.

대표청구항 ▼

[ What is claimed is:] [1.] A method for making hollow workpieces with a circular die comprising:(a) strip casting aluminum alloy to rapidly solidify the alloy without substantial precipitation of alloying elements and forming a cast strip;(b) forming the strip into a cup for the manufacture of a ho

[ What is claimed is:] [1.] A method for making hollow workpieces with a circular die comprising:(a) strip casting aluminum alloy to rapidly solidify the alloy without substantial precipitation of alloying elements and forming a cast strip;(b) forming the strip into a cup for the manufacture of a hollow workpiece; and(c) passing the cup through one or more dies to iron the walls of the cup and thereby lengthen the side wall of the cup to form a hollow workpiece, at least one of the dies having a die angle of less than about 6.degree..