Investment casting refers to making a fusible model with fusible materials, coating several layers of special refractory coating on it, forming an integral shell after drying and hardening, then melting the model from the shell with steam or hot water, then placing the mold shell in the sand box, filling the mold with dry sand, and finally putting the mold into the baking furnace for high-temperature roasting After roasting, the molten metal is poured into it to obtain the casting.

The product obtained by investment casting is precise and complex, which is close to the final shape of the parts. It can be directly used without machining or little processing. It is an advanced process of near net shape formation and an excellent technology in the casting industry, which is widely used. It is not only suitable for casting various types and alloys, but also can produce castings with higher dimensional accuracy and surface quality than other casting methods, and even the complex, high temperature resistant and difficult to process castings that are difficult to be cast by other casting methods can be cast by Investment precision casting.

At present, the investment casting process in the world is developing rapidly and widely used. From the current situation, the future development trend of the process is that the casting products are more and more close to the parts and components products, and the traditional investment castings are only used as blanks, which can not adapt to the rapid changes of the market. The complexity and quality level of parts and components products are getting higher and higher, and the research and development means are becoming stronger and stronger. The application of CAD, cam and CAE has become the main technology of parts product development.

From the analysis of the current development situation, the application of investment casting technology is very wide, and its future development prospects want to be broad.