| 摘要 |
PROBLEM TO BE SOLVED: To injection mold a disk substrate in which the information arrays formed on a stamper are transferred in a small offset. SOLUTION: The fixed mold is provided with a first centering mechanism which rotatively moves the stamper holding member 13 holding the stamper S on the fixed mirror surface block 14 and a second centering mechanism which linearly moves the holding member 13 to the radial direction. The first centering mechanism is so constituted that the teeth, formed in the form of a ring along the outer peripheral face of the holding member 13, are meshed with the worm gear arranged in a proper place in the mold. The second centering mechanism linearly moves the holding member 13 to the radial direction by free slidably inserting the capsule-like protrusion member 17 into the through hole which is formed in the sleeve 12 to the radial direction, making a sprue bushing 11 whose outer peripheral face has the inclined face ascend to the sleeve and pressing the protrusion member 17 by the inclined face. By the above constitutions the stamper can accurately be set to a proper position in the mold cavity. COPYRIGHT: (C)2006,JPO&NCIPI |
