多層押出ブロー成形のピンチオフ工程におけるパリソン形状の定量解析

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タイトル別名
  • Shape Analysis of Multi-layer Parison at the Pinch-off Process in Extrusion Blow Molding
  • タソウ オシダシ ブロー セイケイ ノ ピンチオフ コウテイ ニ オケル パリソン ケイジョウ ノ テイリョウ カイセキ

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抄録

The shape of a multi-layer parison at the pinch-off process in extrusion blow molding was experimentally and quantitatively analyzed by a rapid cooling method. The multi-layers used in this study were composed of HDPE as inner and outer layers and LDPE with lower viscosity by five times than HDPE as a middle layer. The results obtained in this study are as follows;<BR>1) The land region of a mold has no effects on the parison shape at the pinch-off process.<BR>2) The clearance between knives for pinch-off has significant influence on the parison shape. In particular the clearance from 0 mm to 0.1 mm shows remarkable effects on each layer thickness of the parison.<BR>3) In proportion to the decrease of the clearance, the thickness ratio of the middle layer increases owing to the fluidity difference between HDPE and LDPE.

収録刊行物

  • 成形加工

    成形加工 21 (4), 217-222, 2009

    一般社団法人 プラスチック成形加工学会

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