Precision casting is also called wax loss casting, its products are precise, complex, close to the final shape of the parts, can not be processed or rarely processed on the direct use, so the melting die casting is a near net formation of the advanced process. Ancient China: Wang Zixue Ding, copper forbidden, bronze lion and so on, are the masterpieces of melting die casting. Since the 1940s, when molten casting was used in industrial production, it has been developing at a faster rate for half a century. In particular, European and American countries are developing rapidly. Melting casting is used in the aviation and weapons sectors, and is applied to almost all industrial sectors, especially electronics, petroleum, chemical, energy, transportation, light industry, textiles, pharmaceuticals, medical devices, pumps and valves.
In recent years, China's development is also rapid. The development of melting die technology enables molten casting not only to produce small castings, but also to produce larger castings, the contour size of the largest molten die is nearly 2m, while the minimum wall thickness is less than 2mm. At the same time, the molten die castings are also more sophisticated, in addition to linear tolerances, parts can also achieve high geometric tolerances. The surface roughness of the molten die is also getting smaller, which can reach Ra0.4μm.
"Chunquan said.
