| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a bottomed cylindrical body for an aluminum-made bottle can for beverage in which chemical conversion treatment with less damage even in the working of a curled portion is provided without any leakage and corrosion in the bottle can, the bottle can using the same, a bottomed cylindrical body manufacturing method and a chemical conversion device therefor. <P>SOLUTION: In the bottle can manufacturing method for the aluminum-alloy-made bottle can with chemical conversion film and the device therefor in which a bottomed cylindrical body is formed by drawing or ironing an aluminum alloy plate, a cap mounting part is formed on the bottomed cylindrical body by necking, and a screw part is formed on the cap mounting part, a insoluble chemical conversion film is formed over the entire surface inside and outside the bottomed cylindrical body before the necking. A means to immediately stop or delay the progress of the reaction of an inner face of an upper end of the bottomed cylindrical body (a portion forming the outside and the top side of the curl of a bottle mouth part after the screw working of the bottle can) by the chemical conversion solution is applied. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
