| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress scattering of adhesion gas when a mold in an injection molding machine for an optical disk is opened. Ž<P>SOLUTION: The mold includes a fixed mold 23, a movable mold 24 which forms a cavity 31 between it and the fixed mold 23, a stamper 33 arranged in the cavity 31, an outer peripheral ring 36 which is arranged slidably in the movable mold 24 and shapes the outer peripheral part of a molding disk, and a pressurization control mechanism 41 which can set the driving force of the peripheral ring 36 in two stages. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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