| 摘要 |
PURPOSE:To form a can having different diameters, capable of meeting the needs for the diversifying shapes of a can, by containing a forming process for bulging a part in the axial direction of a can body having a basic diam. and a forming process for beading a part of the other part in the axial direction of the basic-diam. part. CONSTITUTION:A rectangular blank material of can-body is rounded into a cylindrical shape, and a side seam is formed by sealing both side-ends, and a straight cylindrical can-body 12 having a basic diam. DO larger than the minimum diam. D1 is formed. Next, a part of h2-a in the lengthwise direction is bulged by using segmental dies, rubber, or hydraulic pressure, to obtain a bulged can-body 12b. Next, a part of o-h2 in the lengthwise direction is radially reduced by beading into a prescribed shape whose minimum diam. is D1, to obtain a can-body 12C. The body 12C is provided with a bottom 13 or a cover 14 by crimpling, to complete a can having different diameters. |
