Precision casting and lost wax casting, its product precision, complex, close to the final shape of the part, not processed or rarely processing is used directly, so the investment casting is a near net form of advanced technology.
Ancient China: Prince Wu Ding, copper ban, bronze and so on, are casting. Since twentieth Century 40 years the investment casting used in industrial production, half a century has been a faster pace. Especially the European and American countries develop rapidly. Now the investment casting used in aviation, Ordnance Department, used in almost all industrial sectors, especially in electronic, petroleum, chemical, energy, transportation, light industry, textile, pharmaceutical, medical equipment, pumps and valves and other departments. In recent years, rapid development in china.