| 摘要 |
PROBLEM TO BE SOLVED: To provide a seamless aluminum square can having superior resistance against flange cracking, moldability, and pressure resistance to prevent a crack on a flange corner even if a neck and a flange are formed at openings of the square can by necking/flanging. SOLUTION: According to the seamless aluminum square can, the neck 1n and the flange 1f are formed at the openings of a side seamless square body 1 by necking/flanging, and a top lid 2 and a bottom lid 3 are fitted to both end openings, respectively, through an organic compound 2b by double seaming. Flange corners 1fc are formed by subjecting the openings of the rectangular trunk 1 to necking/flanging, and each flange corner 1fc has a radius (R) of 5 to 10 mm. The hardness (Hv) of the aluminum plate before processed is 35 to 75, and that after processd is 45 to 75. COPYRIGHT: (C)2007,JPO&INPIT
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