MOLDING METHOD, INJECTION MOLDING MACHINE, INJECTION COMPRESSION MOLDING MACHINE, MOLD, OPTICAL DISK ORIGINAL BOARD, AND OPTICAL DISK

摘要

PROBLEM TO BE SOLVED: To obtain a molded article having a good shape quality by preventing the molded article from being deformed by a pressure change of a material resin filled into a cavity and achieving a mechanism directly working on the pressure change without complication of the employed mold. SOLUTION: A convex slide cavity wall 17 is formed in a fixed mold 1 to make the cavity 3 a closed space during moving a movable mold 2. The thickness of the cavity is broadened by a mold opening amount 12 from a predetermined thickness 15 using a mold clamping mechanism, and a predetermined amount of the material resin 4 is injected and filled while keeping the stopping state. The cavity forming portion of the movable mold 2 is advanced by a compressing amount 16 decided by the predetermined cavity thickness 15 to a position where the cavity thickness becomes thin to compress the material resin 4 injected and filled into the cavity 3. The material resin 4 is cooled and solidified in the cavity 3. Then the molded article 8 is taken out by retreating the movable mold 2 and opening the cavity 3. COPYRIGHT: (C)2005,JPO&NCIPI