| 摘要 |
PROBLEM TO BE SOLVED: To provide a mold structure and a method thereof for replacing a stamper securely and with high accuracy, safely and efficiently without replacing a mold. SOLUTION: In a mold for molding a surface illuminant light guide, an ejector block 11 provided with the gradient of same angle of a light guide plate end face 15 is brought into contact with the light guide plate end face 15, and also the light guide plate 14 is molded as a part of an end face forming cavity 5 when the light guide plate 14 is molded by the cavity. When the molding is completed and mold opening is started, the ejector block 11 is protruded forward, and the light guide plate end face 15 is extruded on an ejector block inner side face 12 being brought into contact with the light guide plate end face 15 to release the light guide plate 14 from the cavity. The ejector block 11 is provided with a hook-shaped section 13 and the stamper 17 is clamped between the hook-shaped section 13 and end face forming cavities 6a and 6b. |
