| 摘要 |
PROBLEM TO BE SOLVED: To prevent the generation of stringing even if demolding timing is quickened by solidifying the resin of the inlet part of the sprue 2a of an injection mold in an early stage. SOLUTION: A partition plate 4 is mounted at the inlet part of the sprue 2a so as to bisect the cross-section of the sprue 2a and projected parts 4a, 4a are formed on both side surfaces of the central part of the partition plate 4.
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