| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for forming a battery case, capable of appropriately adjust a wrinkle pressing force of a blank holder member of a forming die according to the size, depth, etc. of the shape to be formed, thereby easily performing deep drawing to expand an application range for shapes to be formed, and further performing deep drawing without generating a wrinkle, when deep drawing by press-forming is applied to a forming film material having a specific lamination structure. SOLUTION: A forming film material S contains a resin film layer as an outside layer, a resin film layer as an inside layer, and an aluminum foil layer arranged between both film layers. When forming the material S into a predetermined shape by using a press-forming die comprising a die 2, a punch 1, and a blank holder member 5, the wrinkle pressing force of the blank holder member 5 is given by air pressure. COPYRIGHT: (C)2008,JPO&INPIT
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