3-D numerical analysis on the mixing performance for assemblies with filled zone of right-handed and left-handed double-flighted screws and kneading blocks in twin-screw extruders

Kazumori Funatsu, Shin Ichi Kihara, Masaru Miyazaki, Shingo Katsuki, Toshihisa Kajiwara

研究成果: Contribution to journalArticle査読

30 被引用数 (Scopus)

抄録

We have calculated and visualized numerically the mixing performances of four kinds of assemblies in twin-screw extruders that were composed of right-handed or left-handed double-flighted full fight screws and neutral or left-handed stagger angle kneading blocks, taking into consideration industrial usage. We have found that the mixing performance of a kneading block interposed between full flighted screws is strongly influenced by the flow of full flighted screws, in particular that of a neutral kneading block. Furthermore, we have proposed the simple mixing indices, which could describe both uniform mixing and heterogeneous mixing, and also applied them to our marker tracking results of four kinds of assemblies. We found that more uniform mixing is obtained for the assembly that has a neutral kneading block before the right-handed full flight screw, and a more enhanced heterogeneous mixing is obtained for the assembly that has a left-handed kneading block before the left-handed full flight screw. The reason for the latter mixing ability will relate to the quasi-channels of the left-handed kneading block, through which marker clusters flow while elongating.

本文言語英語
ページ(範囲)707-723
ページ数17
ジャーナルPolymer Engineering and Science
42
4
DOI
出版ステータス出版済み - 4 2002

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Polymers and Plastics
  • Materials Chemistry

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