| 摘要 |
PURPOSE: To prevent the generation of mold release inferiority between an upper fixed mold and a molded product by providing the wall part of the cavity for forming the outer peripheral part of the molded product to a movable mold part and forming an undercut part to the wall part. CONSTITUTION: An undercut part 29A is formed to the circumferential part of a disc-shaped cavity 30B, that is, the circumferential wall of the circumferential part 29 of a movable mold 20. Therefore, a projection part 40A is formed to the circumferential part of the molded product 40 molded in the disk-shaped cavity 30B corresponding to the undercut part 29A and chamferring parts 40B are formed on both sides of the projection part 40A. The projection part 40A of the molded product 40 is engaged with the undercut part 29A of the circumferential part 29 of the movable mold 20. When the lower movable mold 20 is moved, that is, a disc part 27 and the circumferential part 29 are moved by this engagement, the molded product 40 is moved along with them and demolded from a stamper 35. |
