| 摘要 |
PROBLEM TO BE SOLVED: To provide an injection compression-molding method of a small-sized light guide plate showing excellent optical performance while shortening a molding cycle time of the small-sized light guide plate in case of molding the small-sized light guide plate by the injection compression-molding. SOLUTION: When the small-sized light guide plate P having a diagonal dimension of 1 inch to 5 inches and the thickest part of 0.25 mm to 1.0 mm is injection compression-molded, a cavity forming surface 62 of a fixed mold 13 and a cavity forming surface 27 of a movable mold 12, and moreover at least one of a sprue bush 56 of the fixed mold 13 or a gate part-forming surface 39 of the movable mold 12 is cooled by cooling medium passages 61, 28, 63, 46 respectively to form the small-sized light guide plate P. COPYRIGHT: (C)2008,JPO&INPIT |
