半精密铸造方法的探索与实践

为解决形状复杂、壁薄、尺寸小、表面质量要求高的铝合金铸件快速制作的问题,运用消失模铸造和石膏型铸造相结合的技术,通过实验开发了一种铝合金壳体铸件的半精密铸造工艺.基本方法是:先将泡沫模型组合造型,再以其为模样进行石膏型制作,然后用铝合金对石膏型浇注.结果表明,利用此法实现了对小型复杂薄壁铝合金铸件的半精密铸造.

Experience and Practice on the Method of the Near Precision Casting

In order to solve the problem that the increasing require of rapid manufacturing of the aluminum alloy casting with complex shape, thin wall and finished surface. The paper developed a novel near precision casting process through a series of experiments involving the technologies of evaporative pattern casting and the plaster casting. The experimental process consisted of making of the build-up foam pattern and the gypsum mould and pouring of aluminum alloy fluid into the plaster mould under appropriate temperature. The results of experiments showed that the novel process is a feasible near precision casting process for manufacturing of little aluminum alloy parts.