摘要
为了研究开有左、右旋螺槽的螺筒结构对单螺杆挤出机熔融段挤出混炼性能的影响,使用POLYFLOW软件,数值模拟了硬质聚氯乙烯(PVC-R)熔体在左旋和右旋螺筒的单螺杆挤出机流道内的三维等温流场和挤出混合过程,研究了螺筒螺棱左右旋向对单螺杆挤出机挤出和混合性能的影响。研究结果表明,与右旋螺筒相比,左旋螺筒挤出熔体的轴向速度可达5 mm/s,左旋结构流道内粒子混合指数大于0.5的区域和拉伸对数也更大,分离尺度更小,因此可提高挤出机挤出输送能力和混合性能。
In order to study the influence of left and right hand helically grooved barrels on extruding and mixing performance of the melting zone of single screw extruder, the 3D isothermal flow fields and mixing process in two single screw extruders with left and right hand helically grooved barrel respectively were numerically simulated by POLYFLOW. The influence of rotating direction of helical groove on extruding and mixing performance of single screw extruder was also studied. The results show that in contrast with that of the right hand helically grooved barrel, the extruding axial velocity of single screw extruder with left hand helically grooved barrel reaches 5 mm/s, the area of which mixing index of particles greater than 0.5 and the logarithm of area stretch are larger, and the segregation scale is smaller, thus the single screw extruder with left hand helically grooved barrel represents better delivery capacity and mixing performance.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2014年第3期124-127,133,共5页
Polymer Materials Science & Engineering
基金
北京理工大学基础研究基金(3100012211304)
关键词
数值模拟
螺筒
挤出
混合
numerical simulation
helically grooved barrel
extrusion
mixing
