| 摘要 |
PROBLEM TO BE SOLVED: To provide an injection molding tool for manufacturing a disk-shaped information medium excellent in the process stability, quality of molded articles and reduced in waiting time at the start of operation. SOLUTION: The injection molding tool (10) constituting an injection mold (25) includes a first and second mirror surface plates (11, 12) relatively and mutually movable for opening and closing a mold opposing against each other, and a mold ring (20) surrounding the first mirror surface plate (11) concentrically, separating the injection mold (25) to the outer edge and movable relative to the fist mirror plate (11). In the injection molding tool for manufacturing a disk-shaped molded articles of information medium particularly in the form of a CD and/or DVD, the excellent process stability, quality of molded articles and reduction in the waiting time at the start of operation are realized by provision of an active temperature adjustment means (26) for the mold ring (20). COPYRIGHT: (C)2004,JPO |
