摘要
利用Moldflow模拟某自动制氧机叶轮的注塑成型过程,探究安装面圆柱度及扇叶端面圆柱度参数的优化方案,以提升叶轮动平衡性能。依据流动阻力及浇口匹配性结果确定最佳的浇口位置,构建浇注系统。初始工艺下的目标变量值不满足设计要求,通过正交试验得到最优工艺组合参数。结果表明:对于安装面圆柱度,熔体温度和模具温度具有显著影响,注射压力和保压压力无显著影响。对于扇叶端面圆柱度,注射压力和保压压力具有显著影响,熔体温度和模具温度无显著影响。综合分析最优工艺参数为:熔体温度395℃,模具温度205℃,注射压力85 MPa,保压压力84 MPa。优化工艺下仿真模拟表明:安装面圆柱度为0.238 mm,比优化前降低26.5%;扇叶端面圆柱度为0.265 mm,比优化前降低37.1%,满足设计指标要求。模拟分析与试模验证叶轮外观状态良好,形状尺寸满足要求。
Moldflow was used to simulate the injection molding process of the impeller of an automatic oxygen erator,and the optimization scheme of the cylindricity parameters of the installation surface and the fan blade terminal face was explored to improve the dynamic balance performance of the impeller. The optimal gate location was determined according to the flow resistance and gate matching results, and the gating system was constructed. The target variable value under the initial process does not meet the design requirements, and the optimal process combination parameters are obtained by orthogonal test. The results show that melt temperature and mold temperature have significant effects on the cylindricity of the installation surface, while injection pressure and holding pressure have no significant effects. Injection pressure and holding pressure have a significant effect on the cylindricity of the fan blade terminal face, but melt temperature and mold temperature have no significant effect. Comprehensive analysis of optimal process parameters: melt temperature is 395 ℃, mold temperature is 205 ℃, injection pressure is 85 MPa, holding pressure is 84 MPa. The simulation under the optimized process shows that the cylindricity of the installation surface is 0.238 mm, which is 26.5%lower than that before optimization. The cylindricity of the fan blade terminal face is 0.265 mm, which is 37.1% lower than that before optimization, meeting the design index requirements. The simulation analysis and test verification show that the impeller has good appearance and meets the requirements of shape and size.
作者
王清
袁霞
铁锐
WANG Qing;YUAN Xia;TIE Rui(Wuxi Vocational Institute of Commerce,Wuxi 214153,China;Shanghai Chuanggu Fastener Manufacturing Co.,Ltd.,Shanghai 201507,China)
出处
《塑料科技》
CAS
北大核心
2021年第10期65-69,共5页
Plastics Science and Technology
关键词
制氧机叶轮
正交试验
圆柱度
参数优化
Oxygenerator impeller
Orthogonal test
Cylindricity
Parameter optimization
