The small formation holes in the brush cover was constructed with the mold core in moving and static container,and center ingate was employed to the gating system.

• 针对电刷端盖压铸件结构及工艺要求,选择端盖口部大端面为动静模分型面,铸件上各成形小孔由动静模型芯对接组成,浇注系统采用中心浇道。