纺丝箱用衣架型模头的流变学结构优化设计  

Rheological structure optimization design of coat-hanger die for spinning box

作　　者：姜帅 吴治国 章艳 戴惠良[1] JIANG Shuai;WU Zhiguo;ZHANG Yan;DAI Huiliang(College of Mechanical Engineering,Donghua University,Shanghai 201620,China;Shanghai Songjiang Open University,Shanghai 201620,China)

机构地区：[1]东华大学机械工程学院,上海201620 [2]上海松江开放大学,上海201620

出　　处：《东华大学学报（自然科学版）》2023年第2期85-91,共7页Journal of Donghua University(Natural Science)

基　　金：上海市自然科学基金资助项目(19ZR1401500)。

摘　　要：为提高熔喷装备纺丝箱均匀分配熔体的性能,同时兼顾纺丝箱腔体制造技术与成本的要求,提出一种使用矩形截面歧管的衣架型模头设计方法。该方法基于Carreau-Yasuda黏度模型,保证了较低或较高流体剪切速率下设计方法的普适性,同时引入特征距离和形状因子概念,将以往具有渐缩圆形截面的分流歧管替换为具有恒定深度的矩形截面歧管,从生产制造角度实现对衣架型模头流道结构的优化。利用CFD软件PolyFlow进行仿真试验,结果表明:以该方法设计的纺丝箱模头能够获得整个幅宽范围内更为均匀的熔体出口速度,满足衣架型模头设计要求。A design method for coat-hanger die with rectangular section manifold is proposed to improve the performance of evenly distributing melt in the spinning box of melt-blown equipment,and to meet the requirements of the manufacturing technology and cost of the spinning box cavity system.The method is based on the Carreau-Yasuda viscosity model,which ensures the universality of the design method at lower or higher fluid shear rates.The method also introduces the concepts of characteristic distance and shape factor,replacing the previous manifold with rectangular-section manifolds with constant depth.The flow path structure of the coat-hanger die is optimized from a manufacturing perspective.The simulation results with CFD software PolyFlow show that the coat-hanger die of spinning box designed by this method can obtain more uniform melt outlet velocity in the whole width range,and meet the design goal of coat-hanger die.

关 键 词：流变学 熔喷装备 纺丝箱 衣架型模头 Carreau-Yasuda模型 POLYFLOW 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]