| 摘要 |
PURPOSE:To contrive an improvement in productivity by shortening a heating or cooling period of time, by a method wherein a stamper is heated by a noncontacting heating device under a state wherein a stationary mold and movable mold are broken and molten resin is injected and the stamper is filled with the molten resin. CONSTITUTION:A stamper 30 is heated by a noncontacting heating device 40 under a state wherein a movable mold 20 is separated from a stationary mold 10. As for the heating device 40, a device such as hot air supply or heat radiation is used. Then the heating device 40 is removed from a space between the stationary mold 10 and movable mold 20, directly after which the movable mold 20 and the stationary mold 10 are clamped by moving the movable mold 20 in the direction of the stationary mold 10, molten resin is injected into a cavity 35 formed between these molds 10, 20 through a sprue 11 and the cavity 35 is filled with the molten resin. With this construction, as a fine spiral groove of the stamper 30 is filled with the resin a base for a high precision optical disc can be obtained easily. |
