| 摘要 |
PROBLEM TO BE SOLVED: To provide a mold for molding a disk substrate without generating vertical burr on the disk substrate. SOLUTION: A stamper positioning cover member 7 is inserted into a hole 5 formed at the center of a stamper 4 arranged on the mirror surface of a fixed mold 1 to be attached to the fixed mold 1. The center of the stamper 4 is positioned with respect to the fixed mold 1 in such a state that a clearance C is provided between the hole 5 and an intermediate part 7C formed into a tapered shape and the vicinity of the inner peripheral edge of the hole 5 is sucked to the mirror surface by sucking air from a gap 36. The clearance C is covered with a flange 7b. Therefore, a molten resin does not enter the clearance C and, therefore, vertical burr is not generated on the disk substrate after the completion of molding. |
