| 摘要 |
PURPOSE:To obtain the high precision cut surface without burr by bonding multiple thermoplastic synthetic resin leathers, sheets or films to each other with high-frequency welding and then cutting them while they still have softness in some degree. CONSTITUTION:A cutter 3 having an edge formed at its lower outside in the inclined form is attached to the outerside of an upper electrode 1. After placing two synthetic resin sheets 5 and 6 on a lower electrode 8 via an insulation sheet 7, the sheets are welded to each other by lowering the upper electrode 1 towards the sheets 5 and 6 and applying the high-frequency voltage thereon while by lowering the cutter 3 together with the upper electrode to form a groove 10 at the outer circumference of the welded part 9. At this time of lowering the upper electrode 1 and cutter 3, the cutter 3 is held at such height by means of a stopper that the cutter will not cut through the sheets at the outerside of the welded part 9. Then, after making the high-frequency voltage off, the sheets 5 and 6 are cut through at the outer circumference of the welded part by lowering the cutter 3 together with the upper electrode 1. |
