METHOD FOR MANUFACTURING TWO-PIECE CAN, CAN BODY, AND METAL PLATE
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United States of America Patent
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Feb 8, 2024
app pub date -
Sep 13, 2019
filing date -
Sep 13, 2019
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Abstract
A method for manufacturing a two-piece can includes punching a metal plate into a disk shape, the metal plate including a Sn-plated layer of 100 mg/m2 or more and 1500 mg/m2 or less provided on a base material made of steel, a Cr-plated layer of 6 mg/m2 or more and 100 mg/m2 or less provided on the Sn-plated layer, and a coating layer laminated on the Cr-plated layer; and shaping by performing drawing and ironing on the metal plate having the disk shape into a can body having a bottomed cylindrical shape, wherein in the shaping, the drawing and ironing is performed so that ((Tb−Tw)/Tb)×100, which is a plate thickness reduction rate from the metal plate having the disk shape to the can body, is set as 35%≤((Tb−Tw)/Tb)×100(%)≤60%.
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