MOLDING TOOL FOR OPTICAL DISC BASE, DEVICE FOR ATTACHING AND DETACHING STAMPER USED THEREFOR, AND STAMPER-FITTING METHOD

摘要

PURPOSE: To provide a molding tool for an optical disc base wherein an inner stamper presser component can be easily detached and attached. CONSTITUTION: A fitting recess part 40 in which an inner stamper presser component 46 is fitted is formed on a cavity forming surface 34 to which a stamper 52 is fitted. Besides, an air passage 44 open to an inner surface of the fitting recess part 40 is provided, and the inner stamper presser component 46 is fixed by vacuum-clamping to the cavity forming surface 34 side by negative pressure air.