| 摘要 |
PURPOSE: To provide an injection mold which can obtain a plastic lens having excellent eccentric accuracy and small eccentric irregularity at each molding even when a clearance which does not trouble the assembling and operating of the mold is provided between an insert and a sleeve or between a mold plate and the sleeve. CONSTITUTION: A fixed sleeve 3 is fixed to a fixed side mold plate 2, and further a fixed insert 4 is fixed by engaging it with the bore of the sleeve 3. Three positioning members 3a protrude from the sleeve 3 toward a movable mold, and the ends are formed of tapered surfaces 3b formed coaxially with the engaging surface of the insert 4 of the sleeve 3. The holes of clearances 10c, 11c in which a movable insert 9 and a rod 12 fixedly protruding from the insert 9 are easily inserted are provided at a movable side mold plate 10 and a receiving plate 11 fixed to the the plate 10, and the insert 9 and the rod 12 are inserted. |
