摘要
本次研究的轴承保持架用于汽车领域,采用尼龙PA66 LGF30制造汽车空调运行系统保持架,具有良好的自润滑性、耐热性、耐磨性、耐低温性,机械力学稳定等特点。轴承保持架采用UG软件对塑件进行实体造型,通过MoldFlow软件进行模流分析,初拟成型方案与成型参数,通过实际注射复检,发现塑件存在外观缩水与欠注缺陷,究其原因初判为塑件收缩不均导致。通过正交试验,选取塑件最大翘曲Y向翘曲变形作为试验指标,对模具温度、熔料温度、填充时间、保压时间、冷却时间为试验因素进行4因素5水平正交试验,结合方差分析结果论证,得出最佳组合,通过参数优化,生产验证,塑件表面没有出现明显外观缩水与欠注缺陷,能够满足生产要求,为类似塑件注射工艺参数优化设置提供良好的理论指导。
The bearing cage in this study is used in the automotive field.Nylon PA66 LGF30 is used to make the cage of automotive air conditioning operation system,which has the characteristics of good self-lubricating,heat resistance,wear resistance,low temperature resistance,mechanical stability and so on.The bearing cage adopts UG software to carry out the solid modeling of the product,carries out the mold flow analysis through MoldFlow software,preliminarily draws up the molding scheme and molding parameters,and we found that the product has the defects of appearance shrinkage and under-injection through the actual injection re-inspection.The reason is initially determined to be caused by the uneven shrinkage of the product.Through the orthogonal test,the maximum warpage and Y-direction warpage deformation of plastic parts are selected as the test index.The four factor and five level orthogonal test is carried out with the mold temperature,melt temperature,filling time,pressure holding time and cooling time as the test factors.Combined with the demonstration of the results of analysis of variance,the best combination is obtained.Through parameter optimization and production verification,There are no obvious appearance shrinkage and under injection defects on the part surface,which can meet the production requirements and provide good theoretical guidance for the optimization of injection molding process parameters of similar products.
作者
朱晓东
Zhu Xiaodong(Jiangsu province and Nantong branch of Career Technical College,Nantong,Jiangsu 226011,CHN)
出处
《模具制造》
2023年第2期32-36,共5页
Die & Mould Manufacture
关键词
轴承保持架
模流分析
正交试验
方差分析
bearing cage
MoldFlow analysis
orthogonal test
variance analysis
作者简介
朱晓东,男,1983年生,高级讲师,硕士,研究方向:模具设计与制造。
