射出成形品上のフローマーク発現機構の伝熱工学的検討

DOI Web Site 被引用文献4件 参考文献8件
  • 佐藤 勲
    東京工業大学 工学部 機械知能システム学科
  • 黒崎 晏夫
    電気通信大学 電気通信学部 機械制御工学科
  • TREDOUX Louis
    Department of Mechanical and Intelligent Systems Engineering, Tokyo Institute of Technology

書誌事項

タイトル別名
  • Investigation of the Mechanism Dominating the Flow Mark Generation in Polymer Injection Molding from a Thermal Engineering Viewpoint.
  • シャシュツ セイケイヒン ジョウ ノ フローマーク ハツゲン キコウ ノ デン

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抄録

This paper deals with the basic mechanism dominating the wavelike flow mark generation in polymer injection molding. There have been a number of papers describing the relation between molding conditions and flow mark generation in polymer injection moldings, but very limited information about the basic mechanism dominating the flow mark generation has so far been reported. In the present paper, the authors paid attention to the development of the frozen polymer layer adjacent to the mold wall, just behind the melt-mold contact line, so as to evaluate analytically the bending strain in the developing frozen layer due to contraction of the polymer during solidification, and tried to correlate the flow mark generation with the bending strain. The result clearly showed that the aspect ratio of flow marks estimated from the bending strain in the frozen layer agrees well not only with the aspect ratios of the actual flow marks measured by ourselves, but also with the ones reported in the literature. The authors therefore concluded that the basic mechanism dominating the flow mark generation can be attributed to the bending strain in the developing frozen layer due to contraction of polymer during solidification.

収録刊行物

  • 成形加工

    成形加工 10 (9), 732-741, 1998

    一般社団法人 プラスチック成形加工学会

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