| 摘要 |
PURPOSE:To prevent the occurrence of the trouble of mold breakage by contacting a protective part with an operating lever to prevent a mold from closing when an open mold is closed under the condition where a sliding core is being gone back. CONSTITUTION:When a rotor 1 is taken out, safety doors 25, 25 are slid to the arrow direction to open. When a circular ring 19 is rotated by means of an operating lever 23 counter-clockwise toward the retreated position B of a sliding core, each long hole of circular arc 20 of the circular ring 19 moves to the same direction and each driving pin 22 moves to the outer direction of the mold. Each sliding core 18 goes back along each straight groove 17, and is separated from the blade part 2 of the rotor 1. An undercut can be thereby pulled out. The top force 12 and the bottom force 13 are thereafter separated and the rotor 1 is taken out. In this case, as the operating lever 23 sticks itself out of the position where the safety doors 25, 25 are closed together, the safety door 25, 25 can not be closed owing to the existence of the operating lever 23. It is thereby possible to prevent the breakage of the mold due to the operation miss of the sliding core after the molding is taken out.
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