通过正交试验和方差分析表明 ,芯砂的强度和灼烧减量 ,随树脂加入量的增加而增加 ,影响显著 ;随再生砂加入量的增加 ,强度降低 ,灼烧减量增加 ,但都比较平缓。通过试验得出了合适的配方和工艺 ,利用所得配方和工艺 ,在工厂进行了批量生产试验 ,取得了满意的效果。表明再生砂在汽车缸盖型芯上应用是完全可行的。 Orthogonal test and analysis of variance showed that the strength and ignition loss of core sand increased with the increase of resin loading, and the effect was significant. With the addition of recycled sand, the strength decreased and ignition loss decreased, but both More gentle. Through the experiment, the suitable formula and technology are obtained. With the obtained formula and technology, batch production test is carried out in the factory, and satisfactory results are obtained. Recycled sand shows that the application of the cylinder head on the car is entirely feasible.