Lost wax method precision casting is introduced

lost wax precision casting investment casting, investment casting process

Now known as lost wax precision casting investment casting, a little cutting or cutting precision casting process, is a superior technology in precision casting industry, its application is very extensive. It applies not only to all types of various precision casting alloys, casting dimensional accuracy, surface quality produce is higher than other precision casting method, and even other precision casting methods difficult to cast complex, high temperature resistant, not easy in processing casting, investment casting can be used to cast.
Investment Casting is developed on the basis of the ancient wax casting. As ancient civilizations, China is using this technology earlier one, far away in the centuries BC, the working people of ancient China created the lost wax precision casting technology for precision casting with a variety of fine patterns and text the tripods and utensils products, such as the Spring and Autumn Period tomb statue disk and so on. Tomb statue sites chassis of intertwined dragon them end to end, staggered up and down, the formation of the intermediate hollow multilayer moire-like pattern, these patterns using conventional precision casting process is difficult to manufacture, but with the lost wax method precision casting process can make use of paraffin strength, easy-carved features like the tomb statue disc to get paraffin arts and crafts materials, with ordinary tools can be carved out, and then additional gating system, paint, dewaxing, casting, you can get a beautiful tomb statue disk.
The practical application of modern investment casting method in industrial production in the 1940s. At that time, the development of aviation jet engines, requiring the manufacture of heat-resistant alloy parts like blades, impeller, nozzle shape complexity, size, precision and smooth surface. Due to the complex shape of the heat-resistant alloy machining difficult, parts, impossible or difficult to use other methods of manufacture, therefore, need to find a new precision molding process, so handed down from ancient lost wax casting, after materials and process improvements, modern investment casting method important development on the basis of the ancient craft. Therefore, the development of the aviation industry to promote the application of investment casting, Investment Casting continuous improvement and perfection, but also created favorable conditions for the aviation industry to further improve performance.
The so-called investment casting process, it simply is to use fusible material (for example made ??of wax or plastic) the fusible model (referred to as the melting mold or model), on which coated with several layers of a special fire-resistant coating, drying andhardened to form a whole shell, and then steam or hot water from the mold shell melted model, type shell is then placed in a sand box, filled with dry sand around in its shape, and finally cast into the roaster inhigh temperature roasting (such as the use of high-strength shell, it can not form and after the release of the shell directly roasting), mold or shell after roasting, after which the pouring of molten metal get castings.