多孔位插头绝缘体注塑模具设计

摘要

The analysis of warpage occurring in the injection molding process for a multi-pin plug insulator was performed by using a Moldflow software to determine maximum number and location of mold gate.On the basis of the characteristics of multi-hole structure,small hole size and high precision of hole position in plastic insulator parts,the injection mold was designed by adopting a series of new techniques including a twice fixing core for mold,a combination process for coreretainer plate and precise positioning for the fixed and movable mold cores to ensure a position accuracy for the holes.The results indicated that the total shrinkage deformation and shrinkage from each direction were optimized when using a side and sub gate with a short edge.It was confirmed by practical production that the designed mould had a reasonable structure and could be used to produce plastic parts with a high quality.%通过Moldflow软件对多孔位插头绝缘体注射成型进行翘曲分析,确定模具最佳浇口的位置和数量;针对塑件孔位多、孔径小及位置精度要求高的特点,模具设计中分别采用定模型芯2次固定,型芯固定板合并加工,动、定模模仁精定位等方法,保证多孔位置精度.结果表明,采用短边单侧潜伏进胶,塑件综合变形及各方向收缩效果最佳;经生产验证,该模具结构设计合理,塑件成型品质高.