Method of manufacturing cylindrical container

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 plurality of groove-formed areas having a plurality of grooves which are arranged along a radial direction on a surface thereof, the plurality of groove-formed areas having the plurality of grooves being formed in an area corresponding to a plurality of sides of the blank having the hexagonal shape,
• 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 plurality of groove-formed areas having the plurality of grooves and the plurality of sides of the blank is in a position that corresponds to the plurality of groove-formed areas having the plurality of grooves.