摘要
研究了聚合物挤出过程拉伸作用对口模出口处流体体系的形态、流变性能的影响。利用Polyfow软件对微管挤出成型过程进行数值模拟,分析了牵引拉伸作用对压力场、速度场及挤出胀大、边界位置变化的影响。结果表明,随着牵引速度的增大,入口压力降低;牵引速度对口模内速度场及挤出胀大影响较小,而对制品在挤出过程中截面尺寸的变化有明显影响。
The influence of drawing on the morphological and rheological property of polymer fluid system near the die exit during extrusion was studied. Numerical simulation of micro-tube extrusion was carried out using software POLYFLOW for analyzing the pressure field, velocity field, the extrusion swelling, and the change of boundary position. The study also showed that as the drawing velocity increased, the inlet pressure reduced, the shape of cross-section of the extrudate was affected significantly, however, the velocity field inside the die and extrusion swelling were little affected.
出处
《中国塑料》
CAS
CSCD
北大核心
2013年第1期87-91,共5页
China Plastics
基金
长沙市科技计划项目(K1003042-11)
关键词
牵引速度
微挤出成型
挤出胀大
数值分析
drawing velocity micro-extrusion extrusion swellingl numerical analysis
