Patent ID: 6463776
Filing Date: 2002-10-15
Classification: B21D

Abstract:
A manufacturing method for a bottle-shaped can in which a small diametrical neck portion, a shoulder portion having a sloped face and a large diametrical body portion are integrally shaped, in which a decoration print is applied at least to the outer surface of the body portion and in which a bottom end is fixed on the lower end portion of the body portion, characterized by comprising:a cup shaping step of shaping a covered metallic sheet, as prepared by forming thermoplastic resin covering films on the two surfaces of a metallic sheet and by applying a lubricant to the thermoplastic resin covering films, into a cup shape by punching out the metallic sheet; a can shaping step of shaping the shaped cup further into a bottomed cylindrical can which is reduced in its diameter and thinned at its body portion; a diametrical small cylindrical portion shaping step of shaping the bottom portion of said bottomed cylindrical can and the body portion in the vicinity of the bottom portion of it into said shoulder portion and an unopened small diametrical cylindrical portion; an opening step of cutting and opening the leading end portion of said small diametrical cylindrical portion; a neck portion shaping step of shaping the neck portion by threading the outer circumference of the opened small diametrical cylindrical portion; a lubricant removing step of removing the lubricant from the outer surface of said bottomed cylindrical can, between the step of shaping said bottomed cylindrical can having the thinned body portion and the step of cutting and opening the leading end portion of said small diametrical cylindrical portion; and a decoration step of decoratively printing the outer surface of the body portion of said bottomed cylindrical can cleared of the lubricant, between the step of shaping said bottomed cylindrical can having the thinned body portion and the step of cutting and opening the leading end portion of said small diametrical cylindrical portion.