中国塑料2026，Vol.40Issue(8)：120-125,6.DOI:10.19491/j.issn.1001-9278.2026.08.019
基于有限元计算的塑料双腔导管气辅挤出口模优化设计
Optimization design of a plastic double-lumen catheter extrusion die based on finite element simulation
摘要
Abstract
In this study,a three-dimensional viscoelastic extrusion flow model for plastic double-lumen catheters was es-tablished based on the PTT constitutive equation,and stable numerical solutions were obtained via the finite element method.The flow field distributions of velocity,shear rate,and first normal stress difference were analyzed under four different gas-assisted section lengths.The simulation results indicate that an extended gas-assisted section contributes to improved forming quality of catheter products.Combined with practical production requirements,a gas-assisted section length of 5 mm was determined as the optimal structural parameter.Furthermore,the realizable k-ε turbulence model was adopted to investigate the gas flow velocity distribution under different inlet angles.The results reveal that a smaller inlet angle optimizes the internal gas flow condition,which further enhances the overall product quality.Considering on-site operational feasibility,30° was selected as the optimal inlet angle.Based on the finite element simulation results of gas-assisted section length and inlet angle,the structural parameters of the double-lumen catheter extrusion die were opti-mized.The reliability of the proposed optimization method was further validated through experimental tests.关键词
塑料双腔导管/气辅挤出/气辅段长度/进气角度Key words
plastic double-lumen catheter/gas-assisted extrusion/length of gas-assisted section/inlet angle分类
化学化工引用本文复制引用
单义杰,刘强,纪海波,肖兵,邓小珍,张伟,祝志芳..基于有限元计算的塑料双腔导管气辅挤出口模优化设计[J].中国塑料,2026,40(8):120-125,6.基金项目
江西水利电力大学国家级大学生创新创业训练计划资助项目(202511319008) （202511319008）
南昌工程学院省级大学生创新创业训练计划资助项目(S202411319014) （S202411319014）
国家自然科学基金青年项目(52303038) （52303038）
江西省自然科学基金面上项目(20252BAC240139) （20252BAC240139）
