| 摘要 |
PROBLEM TO BE SOLVED: To provide an injection molding method excellent in mold release properties while a molding is prevented from being stuck to a fixed-side mold in injection molding using a mold in which surface roughness is set very finely, for example, by applying mirror polishing on the decorative surface of the fixed-side mold. SOLUTION: The fixed-side mold 3 having a mirror finished core which is mirror-finished at least at #8,000 and a movable-side mold 4 which is arranged facing the fixed-side mold 3 at a parting plane 3a and has a cavity 4b and a slide core 4c are provided. The cavity 4b has a main cavity part 4d and a brim part-forming cavity part 4e. In the slide core 4c, a hollow 4f for forming a fitting part 2b in the brim part 2a is formed. The slide core 4c is moved as mold opening progresses to release the engagement of the fitting part 2b by the slide core 4c. COPYRIGHT: (C)2008,JPO&INPIT |
