| 摘要 |
PROBLEM TO BE SOLVED: To form a barrel portion which is thin-walled in a cylindrical shape into a non-cylindrical (substantially prismatic) barrel portion having a plurality of panel wall parts by drawing or ironing without any breakage in a metal can body having the thin-walled barrel portion. SOLUTION: Each panel wall part 41 having a predetermined uneven shape is molded in a part between connection parts 42 so as to leave a connection part 42 of an arc-shaped section with a predetermined interval in the circumferential direction of a cylindrical barrel portion 4 as a part to connect the panel wall parts 41 to each other without substantially changing the wall thickness of a barrel portion 2 by an inner die 11 having an uneven shape corresponding to an inner surface side of the panel wall part 41 and an outer die 12 having an uneven shape corresponding to an outer surface side of the panel wall part 41. COPYRIGHT: (C)2004,JPO
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