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AssigneesToyo Kohan Co., Ltd., Toyo Seikan Co., Ltd.
InventorsShinichi Taya, Masahiro Kai, Junichi Tanabe, Etsuro Tutsumi, Norihito Saiki
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A method of drawn and ironed processing of a resin coated metal sheet, in which in the drawn and ironed processing of resin coated metal sheet, there can be obtained a can body of satisfactorily small wall thickness and at an opening edge part of the can body, the coating resin is free from any defect; and a resin coating drawn and ironed processed can produced thereby. There is provided a method of drawn and ironed processing of a resin coated metal sheet, comprising performing drawn and ironed processing of a resin coated metal sheet composed of a metal sheet having at least one major surface thereof coated with an organic resin with the use of a punch and a die into a can body, characterized in that ironing is conducted with the use of a punch having a small-diameter portion at its rear end so that the ratio of ironing at an opening edge part of the can body after shaping falls within the range of 0 to 15%. Further, there is provided a drawn and ironed processed can of resin coated metal sheet produced through the processing method.
A method of drawing and ironing a resin-coated metal sheet, characterized in that when a resin-coated metal sheet obtained by coating at least one surface of a metal sheet with an organic resin is drawn and ironed into a can body by employing a punch and a die, a punch having a reduced diameter portion toward its rear end is used to perform ironing to form a can body having an ironing ratio of 0 to 15% at its open end.
Dependencies are inferred from the claim text.