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Development of precision casting

pubdate：2016-04-03
  Investment casting is also called lost wax casting. Its products are precise, complex and close to the final shape of parts. It can be used directly without processing or with little processing. Therefore, investment casting is an advanced technology of near net shape formation.
 
  In ancient China, Prince Wu Ding, bronze forbidden, bronze lion and so on are all masterpieces of investment casting. Since investment casting was used in industrial production in 1940s, it has been developing at a rapid speed for half a century. In particular, European and American countries are developing rapidly. Investment casting is used outside the doors of aviation and weapons departments, and is applied to almost all industrial sectors, especially electronic, petroleum, chemical, energy, transportation, light industry, textile, pharmaceutical, medical equipment, pumps and valves. In recent years, China has developed rapidly.
 
  With the development of investment casting technology, investment casting can not only produce small castings, but also produce large castings. The largest investment casting has an outline dimension of nearly 2m, while the smallest wall thickness is less than 2mm. At the same time, the investment casting is also more precise. In addition to the linear tolerance, the parts can also reach a higher geometric tolerance. The surface roughness of investment casting is also getting smaller and smaller, which can reach Ra0.4 μ M.