不同进气角度对片材气辅挤出成型的影响  

Effect of Different Air Intake Angles on Gas-assisted Extrusion of Sheet Polymer

作　　者：王瑞喆 柳和生[1,2] 黄兴元[1] 余忠[1,3] 江诗雨 刘同科 WANG Ruizhe;LIU Hesheng;HUANG Xingyuan;YU Zhong;JIANG Shiyu;LIU Tongke(College of Mechanical and Electrical Engineering,Nanchang University,Nanchang 330031,China;School of Chemical Biology and Materials,East China University of Technology,Nanchang 330013,China;Jiangxi Province Key Laboratory of Polymer Preparation and Processing,Shangrao Normal University,Shangrao 334001,China)

机构地区：[1]南昌大学江西省轻质高强结构材料重点实验室,南昌330031 [2]东华理工大学化学生物与材料学院,南昌330032 [3]上饶师范学院江西省塑料制备成型重点实验室,江西上饶334001

出　　处：《中国塑料》2021年第7期80-86,共7页China Plastics

基　　金：国家自然科学基金资助项目(21664002、51863014);江西省重点研发项目(20203BBE53065)。

摘　　要：采用气辅助挤出成型技术,分别以垂直进气和平行进气2种方式进行了片材挤出实验,根据流变学原理建立了片材三维气辅挤出模型,利用有限元方法对0°、15°、30°、45°、60°、90°6个不同进气角度下熔体在口模内的挤出过程进行了数值模拟。结果发现,改变进气角度对片材挤出制品造成了不同的影响,进气角度为90°时熔体在口模内的变形程度最大,随着进气角度的减小,熔体的变形程度减小;15°~30°的进气角度对聚合物片材气辅挤出成型最有利。In this work,a sheet polymer extrusion experiment was conducted on the basis of the vertical and parallel air intake separately though a gas-assisted extrusion technology. A three-dimensional model was established based on rheological principles,and a finite element method was applied to the numerical simulation of gas-assisted extrusion molding under the different air intake angles of 0°,15°,30°,45°,60° and 90°. The experimental results indicated that a change in air intake angle generated different effects on the gas-assisted extruded products. There was a largest degree of deformation in the melt in the die under an air intake angle of 90°. As the air intake angle decreased,the melt deformation was weakened. The air inlet angle of 15°~30° is most beneficial to the gas-assisted extrusion molding of polymer sheets.

关 键 词：气辅助挤出成型 流变学 进气角度 数值模拟 

分 类 号：TQ320.663[化学工程—合成树脂塑料工业]