机头压缩段结构对熔体流动性能的影响  

Influence of the Structure of the Compression Section of the Head on the Flow Properties of the Melt

作　　者：于玉真 赵金库 王昊 张王康 刘贺 张长森 YU Yuzhen;ZHAO Jinku;WANG Hao;ZHANG Wangkang;LIU He;ZHANG Changsen(School of Mechanical Engineering,Yancheng Institute of Technology,Yancheng,Jiangsu 224051,China;Pudong Zhenhua Vocational and Technical School of Foreign Economics and Technology Afiliated toShanghai Second University of Technology,Shanghai 201209,China)

机构地区：[1]盐城工学院,机械工程学院,江苏盐城224051 [2]上海第二工业大学附属浦东振华外经职业技术学校,上海201209

出　　处：《塑料》2024年第6期150-154,共5页Plastics

基　　金：国家自然科学基金(51672236);盐城工学院博士启动基金(xjr2021011)。

摘　　要：基于工程流体力学理论建立了PP管材直线形和双弧形压缩段挤出机头流道模型,将挤出机头流道压缩段形状设计成直线形和双弧形,运用Ansys Polyflow软件对挤出机头流道内熔体流动性能进行了数值模拟计算,研究了PP熔体在不同压缩段结构下熔体的流动情况,分析不同压缩段结构对机头流道速度场和压力场的影响,结果表明,与直线形相比,双弧形压缩段挤出机头流道内熔体平均流动速度提高了12.5 mm/s;压缩段末端截面处的最大流动速度增大了2.37 mm/s,缩短了熔体在压缩段流道内的停留时间;平均挤出压力提高了2.6 MPa,增强了熔体的塑化性能。Based on the theory of engineering fluid dynamics,linear and double arc compression section extrusion head flow channel models for PP pipes were established.The compression section shape of the extrusion head flow channel was designed to be linear and double arc.Ansys Ployflow software was used to numerically simulate the flow performance of the melt in the extrusion head flow channel.The flow situation of PP melt under different compression section structures was studied,and the influence of different compression section structures on the velocity and pressure fields of the head flow channel was analyzed.The results showed that the average flow velocity of the melt in the double arc extrusion head flow channel was increased by 12.5 mm/s compared to the linear compression section.Compared with the linear section,the maximum flow velocity at the end section of the double arc compression section increased by 2.37 mm/s.Shortened the residence time of the melt in the compression section flow channel.Compared to the straight compression channel,the average extrusion pressure of the melt in the double arc compression section increased by 2.6 MPa,enhancing the plasticization performance of the melt.

关 键 词：挤出机头 双弧形压缩段 流动速度 挤出压力 压缩段流道 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业] TP391.7[自动化与计算机技术—计算机应用技术]