| 摘要 |
PURPOSE: To mold a thin-walled disk generating no deformation by providing a plurality of fine holes to the first wall surface attaching the disk original plate becoming the mold of one surface of a thin-walled disc of a circumferential wall surface forming a space and applying negative pressure to the disk original plate through the fine holes. CONSTITUTION: In a mold 40, the center hole of a stamper 11 is set so as to be fitted to the first core 42 of a fixed mold half body 41 and a negative pressure source applying negative pressure to the respective fine holes 42B of a fixed mirror 42 is driven to suck and fix the stamper 11 to the mirror surface 42A of the fixed mirror 42. In this case, since the stamper 11 can be received only by the mirror surface 42A of the fixed mirror 42 in the mold 40, the deformation caused by the thermal expansion or contraction of a disk original plate can be prevented and a mold capable of forming a thin-walled disk free from deformation as a molded product and having a wide signal recording region can be realized. |
