METHOD OF MANUFACTURING CYLINDRICAL CONTAINER

摘要

There is provided a method of manufacturing a cylindrical container using a metal sheet on at least one surface of which the metal is exposed. The method includes: obtaining a blank having a hexagonal shape from the metal sheet; and processing the blank into a cylindrical shape by pressing a central part of the blank with a punch in a state in which a peripheral part of the blank is clamped between a die for drawing process and a blank holder. The method is characterized by the following features. At least one of the die for drawing process and the blank holder has a groove-formed area at a portion of a surface thereof. The portion corresponds to a side of the blank. The groove-formed area is formed with a plurality of grooves along the circumferential direction. The blank is processed into the cylindrical shape by clamping the peripheral part of the blank between the die for drawing process and the blank holder so that the surface of the blank on which the metal is exposed is in a state of facing the groove-formed area and the side of the blank is in a position that corresponds to the groove-formed area.

主权项

1. A method of manufacturing a cylindrical container using a metal sheet on at least one surface of which the metal is exposed, comprising:
obtaining a blank having a hexagonal shape from the metal sheet; and processing the blank into a cylindrical shape by pressing a central part of the blank with a punch in a state in which a peripheral part of the blank is clamped between a die for drawing process and a blank holder, wherein at least one of the die for drawing process and the blank holder has a recessed part in an area of a surface thereof, the area corresponding to a side of the blank, wherein the blank is processed into the cylindrical shape by clamping the peripheral part of the blank between the die for drawing process and the blank holder so that the surface of the blank on which the metal is exposed is in a state of facing the recessed part and the side of the blank is in a position that corresponds to the recessed part.