1、 I 摘 要 箱体类零件的成形,许多工厂采取铆焊拼接或砂型铸造的方法。前者制造过复杂, 生产成本高,而且延长生产周期。后者尺寸精度低,表面质量差。随着科学技术的不断发 展和生产水平的不断提高以及人类社会生活的需要，对铸造生产提出了一系列新的、更 高的要求，熔模铸造正发挥着越来越重要的作用。熔模铸造就是在蜡模的表面涂多层耐 火材料，待硬化干燥后，加热将蜡模熔去，从而获得具有与蜡模形状相应空腔的型壳， 再经，焙烧之后进行浇注而获得铸件的一种方法。 工艺流程的特点：使用易熔模，无分型面；用涂料浆制型壳，涂层对易熔模复印性 好；热壳浇注金属液充型好。因此，熔模铸造可生产尺寸精确、表面粗糙度低的复杂件，
2、 既适用于大批生产，也适用于小批生产，甚至单件生产。它的产品精密、复杂，接近于 零件最后的形状， 可不加工或很少加工就可直接使用， 被称为近净成型的一种先进工艺。 关键词：箱体类零件；熔模铸造；工艺流程 II Abstract Box part of forming, many factories adopt sand casting splicing or welding method. The former made complex, high production costs, and prolong production cycle. The latter dimension accu
3、racy, low quality of surface. Along with the science and technology unceasing development and production to improve the level of social life and human needs, puts forward a series of casting, new and higher requirements for casting is playing an increasingly important role. Investment casting is in
4、search of the wax models with multilayer fire-proof material, after drying, heat to hardening modulus, wax melting to be obtained with wax mould cavity shape corresponding the shell, after roasting, pouring and a method of castings. The process features: use the fusible mode, no parting surface, Paint, coating slurry system of fusible shell mould good copy, Hot filling liquid metal shell casting. Therefore, the investment casting production size can be accurately, surface roughness low complexi
