散热器铸件结构如图1所示，外形尺寸为350X300X40（mm），齿条壁厚为4mm，毛坯重7kg，材料为ZL104。齿条要求平直、轮廓清晰，底部平面41个M3螺纹孔不允许有气孔、缩松、夹渣等缺陷。由于该铸件齿条、底面要求都较高，故其铸造难度较大。鉴于此，我们对该件进行了详细分析，特 Radiator casting structure shown in Figure 1, the external dimensions of 350X300X40 (mm), rack wall thickness of 4mm, rough weight 7kg, the material is ZL104. Rack requirements straight, clear outline, the bottom plane 41 M3 threaded hole does not allow holes, shrinkage, slag and other defects. Due to the castings rack and bottom requirements are higher, so the casting difficult. In view of this, we conducted a detailed analysis of the item, especially