| 摘要 |
PURPOSE: A method for manufacturing a case of a secondary cell is provided to minimize the deformation of a case, to reduce work for compensating dimension after molding, and to improve the quality of products. CONSTITUTION: A method for manufacturing a rectangular case of a secondary cell using drawing comprises the steps of: molding a board to a rectangular case of which one side is opened through continuous drawing processes; inserting a die(200) in which a concave surface is formed in the center thereof inside the case(100); and forming cut grooves at one side while molding the center of the case in a concave form by beating the outer side of the case using a punch(300), wherein the punch has a convex surface corresponding to the concave surface and has protrusions(310) for forming cut grooves. |
