| 摘要 |
PROBLEM TO BE SOLVED: To injection-mold a sound plastic product free from voids by a simple mold structure without requiring great expense. SOLUTION: In the injection mold 1 for injection-molding a plastic product by injecting a molten resin in a cavity 7 from the valve gate port 21a formed to a second mold 5 through the recessed runner 9 formed to the parting face 3a with the second mold 5 of a first mold 3, a plurality of gas escape grooves 33 communicating with the runner at one ends thereof to discharge the gas in the runner 9 to the outside of the mold 1 are provided to the mold parting face 3a with the second mold 5 of a first mold 3.
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