| 摘要 |
PROBLEM TO BE SOLVED: To prevent plasticized resin from being carbonized by preventing the resin from adhering to the interior of a plasticization part and an injection part. SOLUTION: An ultrasonic wave is made to act upon the plasticization part 21 which plasticizes the thermoplastic resin and/or the injection part 22 which injects the plasticized resin at least after the injection of the resin into a mold.
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