| 摘要 |
PURPOSE:To realize the parts separation by which the minimum joined part can be separated easily and efficiently, by placing alternately at least three pieces of rollers on the surface and the reverse side of a base material plate so that a bending stress is applied to the base material, and also, a bending stress is not applied to a parts part. CONSTITUTION:A pressure roller 4 has a uniform diameter extending over the overall length in the width direction of a metallic plate 1, and forced rollers 51, 52 have a large diameter in the end part in the width direction, and a small diameter in the center part. When the metallic plate 1 is allowed to pass through between the pressure roller 4 and the forced rollers 51, 52, the metallic plate 1 receives a bending force so that it becomes projection downward and deformed. In this case, since the forced rollers 51, 62 have a large diameter in the end part of the metallic plate 1 and a small diameter in the center part, the deformation of the metallic plate 1 is limited to only the end part, and the center parts in which parts 2 are positioned receives no bending force. Accordingly, the minimum joined part 3 becomes a boundary in which the bending force is applied or not, ruptured by receiving a sharing force, and the parts 2 are separated from the metallic plate 1.
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