直线轴承塑料保持架注塑模具设计与工艺优化  

Injection Mold Design and Process Optimization for Plastic Cages of Linear Bearings

作　　者：尹甜甜[1] YIN Tiantian(School of Mechanical and Automotive Engineering,Kaifeng University,Kaifeng 475004,China)

机构地区：[1]开封大学机械与汽车工程学院,河南开封475004

出　　处：《轴承》2023年第9期50-54,共5页Bearing

摘　　要：为保证直线轴承塑料保持架注塑成型的质量,基于CAE技术对其进行了注塑模具设计与工艺优化。通过Moldflow模流分析确定了最佳浇口位置,设计了浇注系统和冷却系统,并以此为参考对塑件进行整体模具结构设计,模具结构采用弯销+滑块的侧抽芯机构设计实现保持架6个异形凹槽的成型;同时,注塑模拟初始分析结果显示翘曲变形量较大,故需进行注塑工艺优化,为确定不同工艺参数对成型质量的影响,以翘曲变形量为分析指标,采用正交试验对注射温度、模具温度、注射压力和保压压力4个工艺参数进行优化,得到最佳的工艺参数组合为注射温度280℃、模具温度100℃、注射压力100 MPa和保压压力90 MPa。最后,通过实际注塑生产验证了模具设计和工艺优化方案的合理性。In order to ensure the quality of injection molding for plastic cages of linear bearings,the injection mold design and process optimization are carried out based on CAE.The optimal gate position is determined by Moldflow analysis,the gating system and cooling system are designed,and the overall mold structure is designed for plastic parts with this as a reference.The mold structure is designed with side-core pulling mechanism of bending pin and slider to realize the molding of six special-shaped grooves of the cages.At the same time,the initial analysis results of injection molding simulation show that the warping deformation is large,so the injection molding process optimization is necessary.In order to determine the impact of different process parameters on molding quality,the warping deformation is taken as analysis index,and the four process parameters,including injection temperature,mold temperature,injection pressure and packing pressure,are optimized by orthogonal test.The optimal combination of process parameters is obtained as follows:injection temperature 280 C,mold temperature 100 C,injection pressure 100 MPa and packing pressure 90 MPa.Finally,the rationality of mold design and process optimization scheme is verified by actual injection molding production.

关 键 词：滚动轴承 直线轴承 保持架 工程塑料 注塑成型 翘曲 正交试验 工艺优化 模具设计 

分 类 号：TH133.33[机械工程—机械制造及自动化] TS943.66[轻工技术与工程—服装设计与工程]