基于灰色关联-熵权法的置物架注塑工艺参数多目标优化  

Multi-objective Optimizations of Shelf Injection Molding Process Parameters based on the Grey Correlation-Entropy Weight Method

作　　者：谷婷婷 王星星 张庆稹 祁畅 仲邵彬 卢奕宁 潘海成 GU Tingting;WANG Xingxing;ZHANG Qingzhen;QI Chang;ZHONG Shaobin;LU Yining;PAN Haicheng(School of Mechanical and Electrical Engineering,Suqian College,Suqian 223800,China)

机构地区：[1]宿迁学院机电工程学院,江苏宿迁223800

出　　处：《塑料工业》2024年第12期96-102,共7页China Plastics Industry

基　　金：宿迁市科技计划项目(Z2021139和K202210);江苏省高校自然基金项目资助(22KJB460008)。

摘　　要：以动感单车置物架为研究对象,开展塑件多目标工艺参数的优化分析。通过初步模流分析确定以缩痕估算、缩痕指数、顶出体积收缩率为优化目标,通过Minitab软件基于田口法建立5因素5水平的正交试验,使用Moldflow软件模拟仿真。所得实验数据进行信噪比处理,通过熵权法计算出各个优化指标的权重,最终得到灰色关联度,实现了多目标工艺参数优化,确定了最优工艺参数组合:模具温度为65℃,熔体温度调整至240℃,注射时间缩短为0.2 s,保压时间延长至11 s,并设定保压压力为80 MPa。针对此优化参数组合进行模拟仿真分析后,获得了显著的改善效果:缩痕估算最大值降低至0.0548 mm,较原始参数减少了41.949%;缩痕指数最大值下降至3.510%,下降了1.531个百分点;顶出体积收缩率最大值也显著降低至5.413%,下降了1.542个百分点。Taking the spinning bike shelf as the research object,the optimization analysis of multi-objective process parameters of plastic parts was carried out.Through the preliminary mold flow analysis,the estimation of sink marks,the shrink mark index and the volume shrinkage at ejection were determined as the optimization goals,and the orthogonal test of five factors and five levels was established by Minitab software based on the Taguchi method,and the simulation was simulated by Moldflow software.The obtained experimental data were processed by the signal-to-noise ratio,the weights of each optimization index were calculated by the entropy weight method,and the gray correlation degree was finally obtained,which realized the optimization of multi-objective process parameters.The optimal combination of process parameters is shown as follows:the mold temperature is 65℃,the melt temperature is adjusted to 240℃,the injection time is shortened to 0.2 s,the holding pressure time is extended to 11 s,and the holding pressure is set to 80 MPa.After the simulation analysis of this combination of optimization parameters,a significant improvement effect was obtained.The results show that the maximum value of the estimated sink mark is reduced to 0.0548 mm,which is 41.949%lower than that of the original parameters.The maximum value of the sink mark index decreases to 3.510%,exhibiting a percent point decrease of 1.531.At the same time,the maximum volume shrinkage at ejection is also significantly reduced to 5.413%,exhibiting a percent point decrease of 1.542.

关 键 词：灰色关联度 熵权法 MOLDFLOW 田口实验法 

分 类 号：TQ320.63[化学工程—合成树脂塑料工业]