Revestment precision casting is refers to the use of fusible materials meltability model, on which the coated with several layers of special refractory coating, after drying and hardening type to form a whole shell, reoccupy steam or hot water from the melt in the shell model, and then put type shells in the sand, dry sand by filling in all round its modelling, finally will be cast into the furnace after high temperature roasting, cast type or shell after roasting, and are casting in pouring molten metal.

Investment mold precision casting products are precise and complex, close to the final shape of the parts, no or little processing on the direct use, is a near net shape of the advanced technology, is an excellent technology in the casting industry, its application is very wide. It is not only suitable for casting of various types and alloys, but also can produce castings with higher dimensional accuracy and surface quality than other casting methods. It can even be used for complex, high-temperature resistant and difficult-to - process castings that are difficult to be produced by other casting methods.

At present, investment mold precision casting technology develops rapidly and is widely used in the world. From the current situation, the development trend of this technology in the future is that the casting products are more and more similar to the parts products, and the traditional precision casting is only used as blank, which can not adapt to the rapid strain of the market. The complexity and quality of parts and components are getting higher and higher, the research and development means are getting stronger and stronger, and professional cooperation is beginning to emerge. The application of CAD, CAM and CAE has become the main technology for the development of parts and components.

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