Fine forging, also known as lost wax forging, the product is fine, messy, close to the final shape of the parts, can not be processed or rarely used directly, so the investment casting forging is a near net shape of advanced technology.
      China: afternoon, ancient Prince Ding copper ban, bronze and so on, are melting forging works. In the half century since the 1940s, the investment casting has been used in industrial production. Especially the rapid development of European and American countries. Mould forging used in aviation, weapons department, was used in all industrial sectors, especially in electronics, petroleum, chemical, energy, transportation, light industry, textile, pharmaceutical, medical equipment, pumps and valves and other departments. China has developed rapidly in recent years.
      The development of the investment casting technology of the melting forging can not only produce small castings, and the production of large castings, large scale profile castings have been nearly 2m, while the smaller thickness is less than 2mm. with investment casting has become more sophisticated, in addition to alignment tolerances, the parts can reach higher number of Gongyi. Investment casting surface roughness is smaller, can reach Ra0.4 M.