Investment casting precision refers to the process of making a fusible model using fusible materials, coating it with several layers of specially made refractory coatings, drying and hardening it to form a complete shell, then melting the model from the shell with steam or hot water, placing the shell in a sand box, filling it with dry sand around it, and finally placing the mold in a roasting furnace for high-temperature roasting. After roasting, the mold or shell is poured with molten metal to obtain the casting.

The products obtained by investment casting are precise and complex, close to the final shape of the parts, and can be directly used without or with little processing. It is an advanced technology for near net formation and an excellent process technology in the casting industry, with a wide range of applications. It is not only suitable for casting various types and alloys, but also produces castings with higher dimensional accuracy and surface quality than other casting methods. Even complex, high-temperature resistant, and difficult to process castings that are difficult to cast by other casting methods can be cast using investment casting 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 this process is that casting products are becoming closer to component products, and traditional precision castings are only used as blanks, which is no longer suitable for the rapid changes in the market. The complexity and quality level of component products are increasing, and research and development methods are becoming stronger. Professional collaboration is beginning to emerge, and the application of CAD, CAM, and CAE has become the main technology for component product development.