Experimental Analysis on In-mold Breakage Process of Carbon Fibers in Injection Molding

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  • 射出成形における金型内の炭素繊維折損挙動解析
  • シャシュツ セイケイ ニ オケル カナガタ ナイ ノ タンソ センイ セッソン キョドウ カイセキ

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Abstract

To date, very few studies have been done to quantitatively evaluate in-mold flow behavior and fiber breakage phenomenon in injection molding using long carbon fiber reinforced material. This study therefore aimed to clarify the correlation between resin flow behavior and fiber breakage behavior by focusing on fiber breakage phenomenon inside the mold. The length of fibers remaining in the long carbon fiber reinforced material which had passed through the flow channels inside the mold was evaluated. And fiber orientation was observed using an X ray CT device especially for channels with progressing breakage. The results clarified that at the entrance of the sprue, fiber breakage progresses the most when fibers orientating in a corrugated pattern are crushed due to the velocity gradient inside the sprue.

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  • SEISAN KENKYU

    SEISAN KENKYU 65 (6), 835-838, 2013

    Institute of Industrial Science The University of Tokyo

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