多模腔卡扣注塑残余应力分析及参数优化  

Residual Stress Analysis and Parameter Optimization of Multi Cavity Clasp

作　　者：宋亮 王培安 SONG Liang;WANG Peian(School of Mathematics and Statistics,Nanyang Institute of Technology,Nanyang,Henan 473004,China;School of Mechanical Engineering,Shangqiu Institute of Technology,Shangqiu,Henan 476000,China)

机构地区：[1]南阳理工学院,数学与统计学院,河南南阳473004 [2]商丘工学院,机械工程学院,河南商丘476000

出　　处：《塑料》2021年第4期81-86,共6页Plastics

摘　　要：将汽车坐垫卡扣作为研究对象,解决实际加工中生产效率较低和使用过程中易断裂的问题。为提高卡扣.的生产效率,采用一模六腔的浇注系统,由数值模拟结果可知,卡扣整体填充较好,料流流动均匀,压力完全可以保证卡扣型腔填充饱满及保压补缩顺利,但是,在距离浇口较近的留缝处的逆向一侧,残余应力的最大值超过许用强度要求,易造成卡扣在使用过程中发生断裂;为提高卡扣的使用强度,基于正交试验以卡扣残余应力作为单一目标的最优参数组合为熔体温度为250℃、填充时间为2.0s、保压压力为70 MPa、模具温度为80℃。结果表明,优化后最大残余应力为48.32 MPa,与优化前最大残余应力(63.89 MPa)相比,降低了24.37%,同时,该结果通过响应曲面验证了可行性,解决了卡扣的生产效率较低和使用过程易发生断裂的问题。The car seat buckle was taken as the research object,and the problems of low production efficiency and easy breakage during use had been solved. The production efficiency of the buckle was improved. A six-cavity pouring system was adopted. The numerical simulation results showed that the buckle was well filled as a whole,the material flow was uniform,and the pressure could completely fill the buckle cavity. And to ensure that the pressure packing was smooth,but the allowable strength requires that the maximum residual stress on the reverse side of the gate closer to the gap exceeds the maximum,causing the buckle to break during use;mentioning the use of high buckle The strength,melt temperature was250 ℃,filling time was 2. 0 s,holding pressure was 70 MPa,mold temperature was 80 ℃,were based on the orthogonal test with the residual parameter of the snap as the single target optimal parameter combination,the results showed that the maximum residual stress after optimization was 48. 32 MPa,which was 24. 37% lower than the maximum residual stress before optimization( 63. 89 MPa). This result was verified by the response surface. The above results solved the production efficiency of the buckle and the problem of easy fracture during use.

关 键 词：注塑成形 浇注系统 残余应力 正交试验 响应曲面 

分 类 号：TQ320.66[化学工程—合成树脂塑料工业]