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, A casting is obtained by pouring molten metal into it.
The products obtained by investment precision casting are precise and complex, close to the final shape of the parts, and can be directly used without processing or very little processing. It is an advanced technology of near-net shape formation. It is an excellent technology in the casting industry, and it is widely used. It is not only suitable for a variety of types, all kinds of alloy casting, and the production of casting dimensional accuracy, surface quality is higher than other casting methods, and even other casting methods are difficult to cast complex, high temperature resistance, not easy to process the casting, can be used investment precision casting.
At present, the world's investment precision casting process develops rapidly and is 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 products. The traditional investment casting is only used as blank, which is no longer suitable for the rapid strain of the market. The complexity and quality of parts and components are getting higher and higher, the means of research and development are getting stronger and stronger, and the professional cooperation begins to appear. The application of CAD, CAM and CAE has become the main technology of parts and components product development.
From the analysis of the current development situation, the application of investment precision casting technology is very wide, and its future development prospect is broad.