基于Moldflow软件的短射法气辅成型数值分析及优化  

Numerical analysis and optimization of short shot gas assisted molding based on Moldflow

作　　者：谭安平[1] 骆静[1] 谭平[1] Tan Anping;Luo Jing;Tan Ping(The Engineering&Technical College of Chengdu University of Technology,Leshan 614000,China)

机构地区：[1]成都理工大学工程技术学院,四川乐山614000

出　　处：《合成树脂及塑料》2023年第3期54-57,71,共5页China Synthetic Resin and Plastics

摘　　要：使用数值成型对短射法气辅成型进行分析及优化。依据经验设计,对塑料扶手设计了3种进气方案,仿真结果表明:设置进气点位于浇口位置附近(方案3),气体虽未能充满所有部位熔体内部,但气道质量最佳。以方案3为基础,优化工艺参数,得到最佳方案为熔体注射量40%,气体延迟时间2.5 s,此时气体充满熔体内部,熔体壁厚减小且壁厚均匀,气道质量较好。以翘曲变形量为考察对象,运用正交试验法继续优化其他工艺参数,得到了最佳工艺方案为:熔体温度240℃,模具温度60℃,保压压力3 MPa,保压时间10 s。Numerical molding was used for analysis and optimization of short shot gas assisted molding.Three air inlet schemes were designed for the plastic handrail according to the experience design.The simulation results show that though the air through the inlet that is near the gate position in scheme 3 doesn’t fill the whole melt,the air inlet quality is the best.Based on scheme 3,the process parameters were optimized,and the best scheme is that the melt injection volume is 40%,and the gas delay time is 2.5 s.At this time,the gas fills the whole interior of the melt,reducing the wall thickness and keeping the uniform thickness of the melt,so the air inlet quality is good.The warpage deformation was used as the object of investigation to optimize other process parameters by the orthogonal experimental method and the optimal process scheme is obtained as follows:melt temperature is 240℃,mold temperature is 60℃,gas holding pressure is 3 MPa,and gas holding time is 10 s.

关 键 词：塑料扶手 短射法 气辅成型 进气点 工艺优化 

分 类 号：TQ320.66[化学工程—合成树脂塑料工业]