| 摘要 |
PROBLEM TO BE SOLVED: To avoid the silver streaking of a molded article by preventing, resin leakage on separation of a molding machine nozzle from a hot runner sprue and resultant bubble interfusion to the runner. SOLUTION: A seal member 66 receives a back flow pressure exceeding atmospheric pressure of a resin in a resin supply route 50, when pressurizing from outside to the resin in the resin supply route 50 is stopped by the separation of a molding machine nozzle 36 from a nozzle touch surface 42a of a hot runner sprue 36; and an opening 42b of the resin supply route 50 is plugged by the seal member 66 from inside the resin supply route 50. Therefore, resin leakage from the hot runner sprue 34 is stemmed and bubble interfusion to the resin in the runner 30 is prevented. COPYRIGHT: (C)2007,JPO&INPIT
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