Producing Cups from Wood by Extrusion Using Flow Phenomenon of Bulk Wood

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  • YAMASHITA Osamu
    Graduate School of Bioagricultural Sciences, Nagoya University
  • YOKOCHI Hideyuki
    Graduate School of Bioagricultural Sciences, Nagoya University
  • MIKI Tsunehisa
    産業技術総合研究所サステナブルマテリアル研究部門
  • KANAYAMA Kozo
    産業技術総合研究所サステナブルマテリアル研究部門

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Other Title
  • 木材のバルク状態における流動現象を利用した押出し成形による深底容器の製作
  • モクザイ ノ バルク ジョウタイ ニ オケル リュウドウ ゲンショウ オ リヨウシタ オシダシ セイケイ ニ ヨル シンテイ ヨウキ ノ セイサク

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Abstract

In order to examine the feasibility of using wood as a plastic substitute, we studied the possibility of producing cups from wood by extrusion. It is common to use powdered wood in the same kind of studies. Whereas in this study, we didn't powdered raw materials and used wood in bulk state. The formability depended strongly on the moisture content of raw materials. We failed to obtain enough fluidity to fill a die cavity with air-dried wood specimens (moisture content : 11%). Whereas it was possible to fill the die cavity both with high moisture content wood specimens (moisture content : 25%) and water saturated wood specimens (moisture content : 90%). However, the states of molded products were quite different between the two. The cups produced from high moisture content wood specimens had cracks. On the other hand, the cups produced from water saturated wood specimens were well formed. The original fiber orientation had much influence on the deformation process and the resulting fiber orientation.

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