| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a punching device with simple configuration which can reduce detachment of a coated film on a workpiece, dust generation, and bending of metal foils constituting a current collector, and also to provide a method using the same. <P>SOLUTION: The punching method comprises punching the workpiece 9 fixed to a die with a punch using a punching die 1 equipped with the die 5, 7 and the punch 3, and the device using the same is provided. The workpiece is punched with the punch through a sheet member 17, so that working force applied to the workpiece is reduced and generation of bending of the foils on a cut surface of the workpiece is prevented. In addition the detachment of the coated film on the workpiece is prevented and dust or the like caused by the punching is prevented from adhering to the die. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
