【摘要】 通过ANSYS软件对L型宽幅挤出机头流道三维非等温流场进行数值模拟,分析高分子物料在非等温挤出过程中的流场规律,探讨机头流道壁面温度、进料口压力、阻尼宽度和阻尼高度等参数对机头流道内物料流动的影响规律。结果表明:阻尼宽度对物料具有明显的调压作用;机头流道参数对物料挤出压力和挤出均匀性的影响趋势不同,当壁面温度为338～343 K、进料口压力为15.0～19.6 MPa、阻尼宽度为8 mm、阻尼高度为3 mm时,物料挤出均匀性和稳定性较好,可实现高分子片材挤出质量和挤出产量的平衡。更多还原

【Abstract】 Numerical simulation of the three-dimensional non-isothermal flow field in the flow channel of the L-type wide extrusion die was carried out through ANSYS software,the flow field law of polymer material in the non-isothermal extrusion process was analyzed,and the influence of parameters such as the wall temperature of the die flow channel,feed port pressure,damping width and damping height on the material flow in the die channel was discussed. The results showed that the damping width had a significant pressure regulating effect on the material;the parameters of the flow channel die had different influences on the extrusion pressure and uniformity of the material. When the wall temperature was 338 ～ 343 K,the feed port pressure was 15. 0～19. 6 MPa,the damping width was 8 mm and the damping height was 3 mm,the uniformity and stability of the material extrusion were better,and the extrusion quality and output of the polymer sheet could be balanced.更多还原