The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 31, 2001
Filed:
Apr. 01, 1999
Keiichi Shimizu, Yamaguchi-ken, JP;
Shinji Shirai, Yamaguchi-ken, JP;
Yasayuki Ikeda, Yamaguchi-ken, JP;
Ayumu Taniguchi, Tokyo, JP;
Jun-Ichi Tanabe, Yamaguchi-ken, JP;
Fumio Kunishige, Yamaguchi-ken, JP;
Masao Komai, Yamaguchi-ken, JP;
Toyo Kohan Co., Ltd., Tokyo, JP;
Abstract
A method of manufacturing a resin-coated aluminum alloy sheet for drawn and ironed cans, which can be formed into a drawn and ironed can free from its wall breaking and having enough strength as a can, when it is formed through a composite forming process, the process including a bending and bending back operation at a die shoulder rounded portion of a small shoulder radius and a subsequent ironing operation, under dry condition; which comprises the steps of homogenization heat treating an aluminum alloy ingot containing essentially 0.5 to 2.0 wt % of Mn, 0.2 to 2.0 wt % of Mg, 0.05 to 0.4 wt % of Si and not more than 0.7 wt % of Fe as inevitable impurities, wherein (Si+Fe)≦0.9 wt %, and subjecting the aluminum alloy ingot to hot rolling to obtain an aluminum alloy sheet to continuous annealing or box annealing, cold rolling, and a surface treatment, heating the resultant sheet, and then coating both surfaces of the sheet with a thermoplastic resin at a predetermined temperature, and immediately quenching the sheet.