Title:
CAN BODY FOR TWO-PIECE CAN MADE OF LAMINATE STEEL SHEET AND METHOD FOR MANUFACTURE THEREOF
Document Type and Number:
WIPO Patent Application WO/2007/020946
Kind Code:
A1
Abstract:
A method for manufacture of a can body for use in a two-piece can by performing a
multi-stage molding of a disc-shaped laminate steel sheet having a radius (R0),
the method comprising the steps of: producing a molded article at least once using
a laminate steel sheet having a polyester resin coated thereon, where the polyester
resin has a planer orientation coefficient of 0.06 or less and the molded article
has the height (h), the maximum radius (r) and the minimum radius (d) satisfying
the following requirements: d≤r, 0.2≤d/R≤0.5 and 1.5≤h/(R-r)≤2.5
wherein R represents the radius of a laminate steel sheet having a weight equivalent
to that of the finished molded article; heating the molded article at least once
at a temperature equal to or higher than 150˚C and equal to or lower than
the melting temperature of the polyester resin; and processing the molded article
into a molded article satisfying the following requirements: d≤r, 0.1≤d/R≤0.25
and 1.5≤h/(R-r)≤4. The method can manufacture a can body for
a two-piece can which is made of a laminate steel sheet and is free from the detachment
or fracture of a resin layer, readily at a low cost.
Inventors:
KUBO HIROSHI (JP)
KOJIMA KATSUMI (JP)
NISHIHARA YUKA (JP)
YASUE YOSHIHIKO (JP)
IWASA HIROKI (JP)
KOJIMA KATSUMI (JP)
NISHIHARA YUKA (JP)
YASUE YOSHIHIKO (JP)
IWASA HIROKI (JP)
Application Number:
PCT/JP2006/316114
Publication Date:
February 22, 2007
Filing Date:
August 10, 2006
Export Citation:
Assignee:
JFE STEEL CORP (JP)
KUBO HIROSHI (JP)
KOJIMA KATSUMI (JP)
NISHIHARA YUKA (JP)
YASUE YOSHIHIKO (JP)
IWASA HIROKI (JP)
KUBO HIROSHI (JP)
KOJIMA KATSUMI (JP)
NISHIHARA YUKA (JP)
YASUE YOSHIHIKO (JP)
IWASA HIROKI (JP)
International Classes:
B21D51/26; B65D1/00
Foreign References:
| JPH08309465A | 1996-11-26 | |||
| JP2004148324A | 2004-05-27 | |||
| JP2001246695A | 2001-09-11 | |||
| JPS5935344B2 | 1984-08-28 | |||
| JPH07106394B2 | 1995-11-15 | |||
| JP2526725B2 | 1996-08-21 | |||
| JP2004148324A | 2004-05-27 | |||
| JPS5935344B2 | 1984-08-28 | |||
| JPS6122626B2 | 1986-06-02 |
Other References:
See also references of EP 1914024A4
Attorney, Agent or Firm:
OCHIAI, Kenichiro (JFE Techno-Research Corporation 7th Floor, Yanagiya Building, 1-10, Nihonbashi 2-chome, Chuo-k, Tokyo 27, JP)
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