| 摘要 |
PROBLEM TO BE SOLVED: To prevent the generation of gate clogging and to realize the enhancement of a material yield in an injection mold for ejecting a runner part 23 and the undercut-shaped gate part 24 integrally molded along therewith to release them. SOLUTION: An escape space 25, which makes the runner part 23 movable in a direction permitting the undercut-shaped gate part 24 to get out of the gate 6 of the mold 1, is formed simultaneously with the molding of a molded product 21. When the undercut-shaped gate parts 24 are integrally molded to both ends of the runner part 23, the escape space 25 is formed to the runner part 23 as a slit.
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