二軸スクリュ押出機の性能に関する理論的研究第2報 循環流を伴うかみ合い型異方向回転二軸スクリュを用いた三次元流動解析
Theoretical Study on Performance of a Twin Screw ExtruderII. Three Dimensional Flow Analysis in an Intermeshing Counter-rotating Twin Screw Extruder with Circulation Flow
劉 麗潔・東 久光・長嶋勇希・梶原稔尚・船津和守
Liu, Lijie / Higashi, Hisamitsu / Nagashima, Yuki / Kajiwara, Toshihisa / Funatsu, Kazumori
We have developed a prediction technique for the three-dimensional flow field in the melt conveying zone in intermeshing counter-rotating twin screw extruders with circulation flow by the finite element method. We obtained the details of the velocity and stress fields for the full flight screw and the relationship between circulation flow rates and the screw configurations. It was found that circulation flow rates become large with increasing flight width and decreasing calender gap. We also obtained the spatial distribution, residence time distribution and history of maximum shear stress using a numerical tracer experiment.
Key words: Twin screw extruder / Three dimensional flow analysis / Non-Newtonian flow / Finite element method