| 摘要 |
PROBLEM TO BE SOLVED: To simply mold a molded article having a notch formed to one peripheral wall extending in the rapping direction thereof and having a bead edge becoming an undercut on the side end surface of the notch. SOLUTION: The injection mold 1 is constituted of a fixed mold 2, a movable mold 3 freely movable with respect to the fixed mold 2 and the core 4 provided to the fixed mold 2 so as to be freely movable in the moving direction of the movable mold 3. The mold surface corresponding to the notch 11a is formed by half by the fixed mold 2 and the core 4. The core 4 is urged so as to move from the fixed mold 2 through an elastomer 5 and locked by the ejector pin 6 cooperating with the movement of the movable mold 3. Therefore, when the mold is opened by injection molding, the molded article 10 is ejected by the ejector pin 6 and the core 4 is pushed up in a cooperative state. Thereafter, a resin is shrunk and the undercut accompanied by the die-cut gradient of the bead edge on the side end surface of the notch 11a with the recessed part 4a of the core 4 is eliminated to take out the molded article 10.
|
