Investment precision casting is developed on the basis of ancient wax casting. As an ancient civilizations country, China is one of the countries using the technology earlier. Long before hundreds of years, the ancient working people of our country created the lost wax casting technique, for casting various fine bell,tripod and vessels with decorative pattern and words, such as the honor plate found in Zenghouyi tomb of Spring and Autumn Period etc. The base of honor plate in Zenghouyi tomb has multiple mutual winding dragons,which are end to end, fluctuation crisscross, forming middle hollow-out the multilayer moire shape design.These designs for common casting is too hard to make out, but with
lost wax casting method, because wax has no strength and it is easy to carve characteristics, using common tools it is able to get the wax handicraft carved same as the honor plate from Zenghouyi tomb. And then with additional gating system, coating, dewaxing and pouring, you'll get a fine honor plate of Zenghouyi tomb.
The practical application of modern investment casting method in industrial production is in the 1940s. With the development of air jet engine,it requests manufacturing like vane, impeller, nozzle etc with complex shape, precise size and smooth surface heat resistant alloy parts. Due to the heat resistant alloy material is difficult to do mechanical processing, and the parts have complex shape, so that it cannot or difficult to use other methods for manufacturing. Therefore, it needs to find a new precision molding process So taking the ancient survived lost wax casting as reference and improving the material and process, the modern investment casting method has obtained important development on the basis of ancient technology. So, the development of aviation industry promotes the applications of investment casting and the continuous improvement and perfection of investment casting creates the favorable conditions for aviation industry to improve further performance.
Our country starts in the 1950s and 1960s to apply investment casting to industrial production. Thereafter this advanced casting technology has been getting a great development and in succession widely used in manufacturing industry such as aviation, automotive, machine tool, ship, internal combustion engines, gas turbine, telecommunications equipment, weapons, medical equipment and cutter etc, as well as used in the manufacture of arts and crafts.
