| 摘要 |
PROBLEM TO BE SOLVED: To scarcely generate a strain by forming an end face of a compression core in a shape having a smooth top protruding at its center from its periphery. SOLUTION: At the time point of completing an injection, a small uncharged part for pressing and compressing is retained in a mold cavity. Then, a pressing pole is projected forward, a compression core 10 is pressed, its convex-like spherical surface 10c formed at an end of a leg 10a is brought into contact with a local part of molten resin (r) in the cavity, and further pressed. At this time, the compressed resin (r) can be released to a periphery along the surface 10c. Accordingly, a concentration of a stress at a compressed part is avoided and made uniform. And, a thin plate-like molding material is solidified while this state is maintained as it is. |
