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1. (AU1996074814) A method for making hollow workpieces

Office : Australia
Application Number: 74814/96 Application Date: 30.10.1996
Publication Number: 1996074814 Publication Date: 17.07.1997
Publication Kind : A
Prior PCT appl.: Application Number:US1996017312 ; Publication Number: Click to see the data
IPC:
B21D 22/20
B21D 22/28
B21D 37/16
B22D 11/06
B PERFORMING OPERATIONS; TRANSPORTING
21
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
D
WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING
22
Shaping without cutting, by stamping, spinning, or deep-drawing
20
Deep-drawing
B PERFORMING OPERATIONS; TRANSPORTING
21
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
D
WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING
22
Shaping without cutting, by stamping, spinning, or deep-drawing
20
Deep-drawing
28
of cylindrical articles using consecutive dies
B PERFORMING OPERATIONS; TRANSPORTING
21
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
D
WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING
37
Tools as parts of machines covered by this subclass
16
Heating or cooling
B PERFORMING OPERATIONS; TRANSPORTING
22
CASTING; POWDER METALLURGY
D
CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
11
Continuous casting of metals, i.e. casting in indefinite lengths
06
into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
CPC:
B22D 11/0605
B21D 22/201
B21D 22/28
B21D 22/286
B21D 37/16
Y10T 29/49988
Applicants: Kaiser Aluminum & Chemical Corporation
Inventors: Sun, Tyzh-Chiang
Priority Data: 553080 03.11.1995 US
698503 15.08.1996 US
Title: (EN) A method for making hollow workpieces
Abstract:
(EN) 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 (122) which is drawn and passed through one or more dies to iron the walls of the cup (122) and thereby lengthen the side walls thereof using at least one circular die (120) having a die angle of less than about 6 degrees and a chamfer angle of less than 35 degrees. It has been found that the use of such die angles prevents or minimizes galling and tearoffs.
Also published as:
WO/1997/016269