CAD/CAE技术在某电器盖注塑模设计上的应用

为解决不规则盖类塑件模具设计难题，以某电器盖为例，运用CAE技术对单点浇口、双点浇口X向布置和双点浇口Y向布置3种浇注系统方案成型效果进行对比，对动模隔板式冷却水路、定模普通冷却水路进行了冷却效果分析，确定采用单点浇口浇注系统；针对分析中发现的收缩不均匀和应力过大等问题，通过改变塑件局部厚度，调整模具温度、充填时间和保压曲线等成型工艺参数、优化冷却水路布置等方式，确保获得合格的塑件；用CAD软件NX以及MoldWizard模块设计了主分型面、工作零件与固定腔采用斜面定位方式、斜顶侧抽芯机构、小孔用推管推出与塑件主体用推杆推出相结合的脱模机构，完成了三板模标准模架和标准件的加载，提高了模具设计和试模的效率.

Application of CAD / CAE Technology on Injection Mold Design for an Electrical Appliance Cover

To solve several problems in mold design of irregular cover plastic parts, taking an electrical appliance cover as an example, CAE technology was adopted to compare molding effects of three gating system schemes：single point gate, double point gates along X direction and double point gates along Y direction, cooling analysis was conducted to test effect of cooling system with baffled hole system in moving mold side and simple cooling hole in fixed mold side. Single point gate scheme was selected. For problems found in analysis such as uneven shrinkage and excessive stress, by changing local thickness of plastic part model, adjusting molding process parameters such as mold temperature, filling time and packing curve, optimize layout of cooling system, qualified plastic parts were obtained. With CAD software NX and MoldWizard plug-in , mold structure was constructed including main parting surface, inclined plane positioning between mold working parts and place chambers, dowel lifters, ejecting mechanism combining ejector sleeve for small hole and ejector pins for main body of plastic part, standard 3-plate mold base and standard parts. Efficiency of mold design and test was improved.