工艺参数对溢流法水辅注塑残余壁厚的影响  

Effect of Process Parameters on Residual Wall Thickness in Overflow Water-Assisted Injection Molding

作　　者：周海迎 柳和生[1,2] 江青松[2] 李为平 ZHOU Haiying;LIU Hesheng;JIANG Qingsong;LI Weiping(School of Mechanical and Electrical Engineering,Nanchang University,Nanchang,Jiangxi 330031,China;Jiangxi Province Key Laboratory of Polymer Micro/Nano Manufacturing and Devices,East China University of Technology,Nanchang,Jiangxi 330013,China)

机构地区：[1]南昌大学,机电工程学院,江西南昌330031 [2]东华理工大学,江西省聚合物微纳制造与器件重点实验室,江西南昌330013

出　　处：《塑料》2020年第3期47-51,共5页Plastics

基　　金：国家自然科学基金(21664002);江西省科技厅重点研发计划(20161BBE50073)。

摘　　要：残余壁厚是影响短纤维增强复合材料水辅助注射成型塑件力学性能的重要指标,与工艺参数存在非线性关系。对溢流法水辅助注射成型进行了数值模拟,中心复合设计方法进行实验设计并获取了残余壁厚的样本数据,采用线性回归方法建立残余壁厚与工艺参数间的响应面多元二次代理模型,通过方差分析研究了残余壁厚对熔体温度、模具温度、延迟时间、注水压力及注水温度的敏感性,并分析参数交互作用对残余壁厚的影响。研究结果表明,注水压力、延迟时间及注水温度是影响残余壁厚的主要参数;随着注水压力的增大,残余壁厚值逐渐减小,但是,随着延迟时间的延长和注水温度的升高,残余壁厚值逐渐增大。Residual wall thickness(RWT)is an important index affecting the mechanical properties of short-fiberreinforced composites water-assisted injection molded parts,and has a nonlinear relationship with process parameters.The sample data of RWT were obtained by the simulation of overflow water-assisted injection molding,as well as the methods of central composite experimental design.The response surface multivariate quadratic model between the process parameters and RWT was constructed using the linear regression method.The sensitivities of RWT to the process parameters(melt temperature,mold temperature,delay time,water injection pressure and water injection temperature)were investigated using variance analysis,and the interaction effects of the significant process parameters on RWT were analyzed as well.The results showed that the water injection pressure,delay time and water injection temperature are the predominant factors for RWT;the value of RWT decreased as the water injection pressure rose,and increased with the increasing delay time and water injection temperature.

关 键 词：残余壁厚 工艺参数 水辅注塑 短纤维 响应面法 

分 类 号：TQ320.6[化学工程—合成树脂塑料工业] TP391.7[自动化与计算机技术—计算机应用技术]