注塑机注射螺杆熔融段流固耦合分析及优化  

Fluid-Structure Interaction Analysis and Optimization of Injection Screw Melt Section of Injection Molding Machine

作　　者：王昌[1] 魏延峰 张立良 张智铖 WANG Chang;WEI Yanfeng;ZHANG Liliang;ZHANG Zhicheng(School of Mechanical Engineering,Inner Mongolia University of Science and Technology,Baotou,Inner Mongolia 014010,China)

机构地区：[1]内蒙古科技大学,机械工程学院,内蒙古包头014010

出　　处：《塑料》2023年第6期130-135,共6页Plastics

基　　金：内蒙古自然科学基金(2022LHMS05001)。

摘　　要：针对注塑机螺杆长期受到的高黏度熔融塑料流体挤压发生塑性变形,降低螺杆寿命的问题,以1600 k N注塑机螺杆熔融段为研究对象,进行正交试验分析,在提高螺杆寿命的同时,保证了螺杆注射效率。以螺杆导程、棱宽和槽深为变量,以螺杆熔融段轴向流速、最大等效应力、最大变形以及最大容量为评价指标,经过设计正交试验,运用ANSYS Fluent以一种低密度聚乙烯为塑料流体材料进行单向流固耦合分析。结果表明,当螺杆导程为50 mm、棱宽为3.6 mm、槽深为3 mm时的优化效果最佳,与优化前相比,轴向流速提高了6%,等效应力降低了26%,最大变形降低了18%,最大容量提升了3%。优化后,螺杆等效应力和变形较小,流体轴向流速更快、流体最大容量更高。Aiming at the problem that the screw of the injection molding machine was subjected to the long-term plastic deformation of the high viscosity molten plastic fluid extrusion and reduces the screw life,the melting section of the screw of the 1600 k N injection molding machine was used as the research object to carry out orthogonal test analysis to improve the screw life and ensure the screw injection efficiency.Taking the screw lead,prism width and groove depth as the variables,and taking the axial flow rate,maximum isokinetic force,maximum deformation and maximum capacity of the screw melt section as the evaluation index,ANSYS Fluent was used to analyze unidirectional fluid-structure interaction analysis of a low-density polyethylene as a plastic fluid material after design orthogonal tests.The results showed that when the screw lead was 50 mm,the edge width was 3.6 mm,and the groove depth was 3 mm,the optimization effect was the best,compared with the optimization,the axial flow rate was increased by 6%,the equivalent force was reduced by 26%,the maximum deformation was reduced by 18%,and the maximum capacity was increased by 3%.After optimization,the screw had less effect force and deformation,faster axial flow rate of the fluid,and higher maximum fluid capacity.

关 键 词：注塑机 螺杆 熔融段 单向流固耦合 正交试验 

分 类 号：TP391.7[自动化与计算机技术—计算机应用技术]