METHOD FOR MANUFACTURING SPECIAL-SHAPED CAN, EXPANDING DIE, AND SPECIAL-SHAPED CAN

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing special-shaped cans capable of improving decorative effects of the cans, and capable of reducing the influence of deformation apt to occur during molding on the opened end of the can body.;SOLUTION: The method for manufacturing the special-shaped cans comprises the steps of expanding part of a cylindrical can member 10 to form a diameter expanded part 16 of the can body with a diameter larger than the diameter of the upper part 14a of the can body and a lower part 14b of the can body. In the expanding process of expanding the can member 10, an upper nearly hoop-like projecting part 22a provided over the entire periphery of a part becoming the upper part of the diameter expanding part 16 of the can body of the can member 10 and a lower nearly hoop-like projecting part 22b provided over the entire periphery of a part becoming the lower part of the diameter expanding part 16 of the can body have an expanded diameter larger than the diameter of an inclined recessed pattern 26 of an inclined uneven pattern 24 provided inclinedly to the circumferential direction of the can body 14 between the upper nearly hoop-like projecting part 22a and the lower nearly hoop-like projecting part 22b.;COPYRIGHT: (C)2005,JPO&NCIPI