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1. (WO1997016269) A METHOD FOR MAKING HOLLOW WORKPIECES
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1997/016269 International Application No.: PCT/US1996/017312
Publication Date: 09.05.1997 International Filing Date: 30.10.1996
Chapter 2 Demand Filed: 15.05.1997
IPC:
B21D 22/20 (2006.01) ,B21D 22/28 (2006.01) ,B21D 37/16 (2006.01) ,B22D 11/06 (2006.01)
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
Applicants:
KAISER ALUMINUM & CHEMICAL CORPORATION [US/US]; 6177 Sunol Boulevard Pleasanton, CA 94566, US (AllExceptUS)
SUN, Tyzh-Chiang [US/US]; US (UsOnly)
Inventors:
SUN, Tyzh-Chiang; US
Agent:
ROCKEY, Keith, V. ; Dressler, Rockey, Milnamow & Katz, Ltd. Two Prudential Plaza Suite 4700 180 North Stetson Steet Chicago, IL 60601, US
COOPER, George, M.; Jones, Tullar & Cooper, P.C. Suite 1002 2001 Jefferson Davis Highway Arlington, VA 22202, US
Priority Data:
08/553,08003.11.1995US
08/698,50315.08.1996US
Title (EN) A METHOD FOR MAKING HOLLOW WORKPIECES
(FR) PROCEDE DE REALISATION DE PIECES D'OUVRAGE CREUSES
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.
(FR) Procédé de réalisation de pièces d'ouvrage creuses, telles que des contenants de boisson, à l'aide d'une matrice circulaire dans laquelle un alliage d'aluminium est coulé en bandes dans des conditions telles que cet alliage se solidifie rapidement, sans précipitation appréciable. Ensuite, l'alliage d'aluminium est embouti de manière à revêtir la forme d'un bol (122) qui passe par une ou plusieurs matrices afin que les parois du bol (122) soient étirées, de manière à être allongées, en utilisant au minimum une matrice circulaire (120) présentant un angle inférieur à environ 6° et un angle de chanfrein inférieur à 35°. On constate que l'utilisation de tels angles de matrice prévient ou réduit au minimum les phénomènes de grippage et de déchirement.
Designated States: AL, AM, AT, AU, AZ, BB, BG, BR, BY, CA, CH, CN, CZ, DE, DK, EE, ES, FI, GB, GE, HU, IS, JP, KE, KG, KP, KR, KZ, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, TJ, TM, TR, TT, UA, UG, US, UZ, VN
African Regional Intellectual Property Organization (ARIPO) (KE, LS, MW, SD, SZ, UG)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
AU1996074814