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

被引：37

作者：

Nakayama, Yasuya ^{[1
]}

Takeda, Eiji ^{[1
]}

Shigeishi, Takashi ^{[2
]}

Tomiyama, Hideki ^{[2
]}

Kajiwara, Toshihisa ^{[1
]}

机构：

[1] Kyushu Univ, Dept Chem Engn, Fukuoka 8190395, Japan

[2] Japan Steel Works Ltd, Hiroshima Plant, Hiroshima 7368602, Japan

来源：

CHEMICAL ENGINEERING SCIENCE | 2011年 / 66卷 / 01期

关键词：

Polymer processing; Twin-screw extruder; Numerical simulation; Dispersive mixing; Distributive mixing; FLOW-FIELD ANALYSIS; NUMERICAL-SIMULATION; NONISOTHERMAL FLOW; EXPERIMENTAL VALIDATION; NEWTONIAN FLUIDS; FINITE-ELEMENT; PERFORMANCE; DISCS; MECHANISMS; EFFICIENCY;

D O I：

10.1016/j.ces.2010.10.022

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

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 characterisitics, 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. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：103 / 110

页数：8

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