| 摘要 |
PROBLEM TO BE SOLVED: To provide a press working method by which the opening part can be accurately formed by preventing the collapse and the peeling of a resin layer to a metal sheet having the resin layer at least. SOLUTION: By dividing an opening part 55c of a reservoir between the opening parts 55c, 55d of the reservoir into two regions of an approaching region 66 including an approaching part 65 which locally approaches the both neighboring opening parts 55b, 55d and the rest region 67 other than that approaching region 66 and simultaneously punching a portion of the base material 59 of an adhesive film corresponding to the approaching part 66 and a portion corresponding to the opening parts 55b, 55d of the reservoir in the same stage; the approaching region 66 and the opening parts 55b, 55d are formed. Also, by punching the portion corresponding to the rest region 67 in the base material 59 of the adhesive film in a different stage from the approaching region 66 and the opening parts 55b, 55d of the reservoir and connecting the approaching region 66 and the rest region 67 into a series; the opening part 55 of the reservoir is formed. COPYRIGHT: (C)2008,JPO&INPIT
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