注气压力对塑料微管挤出成型影响分析  

Influences of Gas Injection Pressure on Plastic Microtube Extrusion Molding

作　　者：傅志红[1] 尹业刚 王志伟[1] 姚晨[1] 

机构地区：[1]中南大学机电工程学院,高性能复杂制造国家重点实验室,湖南长沙410083

出　　处：《塑料工业》2015年第4期53-56,60,共5页China Plastics Industry

基　　金：长沙市科技计划项目(K1303004-11)

摘　　要：针对聚丙烯(PP)进行毛细管流变实验,利用Origin软件拟合得出了Bird-Carreau黏度模型特性参数。使用Polyflow软件对塑料微管挤出成型进行数值模拟,分析了注气压力对微管截面尺寸、压力场、速度场的影响,并确定了合理的注气压力范围。结果表明,随着注气压力的增加,微管管径增加,壁厚减小。The rheology testing of polypropylene （PP） with the capillary rheometer was conducted, and characteristic parameters of Bird-Carreau viscosity model were fitted out by Origin software. The numerical simulation for plastic microtube extrusion molding was carried out by use of Polyflow software. Effects of the gas injection pressure on the section size of microtube, pressure field and velocity field were analyzed, so the reasonable range of gas injection pressure was determined. Results showed that with the increasing gas injection pressure, the section size of microtube increased and the wall thickness of microtube decreased.

关 键 词：流变实验 黏度模型 数值模拟 注气压力 

分 类 号：TQ320.663[化学工程—合成树脂塑料工业]