Melt-mixing by novel pitched-tip kneading disks in a co-rotating twin-screw extruder

Yasuya Nakayama, Eiji Takeda, Takashi Shigeishi, Hideki Tomiyama, Toshihisa Kajiwara

研究成果: Contribution to journalArticle査読

40 被引用数 (Scopus)


Melt-mixing in twin-screw extruders is a key process in the development of polymer composites. Quantifying the mixing performance of kneading elements based on their internal physical processes is a challenging problem. We discuss melt-mixing by novel kneading elements called "pitched-tip kneading disk (ptKD)". The disk-stagger angle and tip angle are the main geometric parameters of the ptKDs. We investigated four typical arrangements of the ptKDs, which are forward and backward disk-staggers combined with forward and backward tips. Numerical simulations under a certain feed rate and screw revolution speed were performed, and the mixing process was investigated using Lagrangian statistics. It was found that the four types had different mixing characteristics, and their mixing processes were explained by the coupling effect of drag flow with the disk staggering and pitched-tip and pressure flows, which are controlled by operational conditions. The use of a pitched-tip effectively controls the balance of the pressurization and mixing ability.

ジャーナルChemical Engineering Science
出版ステータス出版済み - 2011

All Science Journal Classification (ASJC) codes

  • 化学 (全般)
  • 化学工学(全般)
  • 産業および生産工学


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