The development of precision casting

precision casting is also called Lost wax casting. Its products are precise, complex, and close to the final shape of the part, and can be used directly without processing or with little processing. Therefore, investment casting is an advanced process with near-net shape.

Ancient my country: Prince Wuding, Bronze Ban, Bronze Lion, etc. are all masterpieces of investment casting. Since investment casting was used in industrial production in the 1940s, it has been developing at a rapid rate for half a century. In particular, European and American countries are developing rapidly. Investment casting is used in almost all industrial sectors, especially in electronics, petroleum, chemical, energy, transportation, light industry, textiles, pharmaceuticals, medical equipment, pumps and valves. In recent years, my country has developed rapidly.

The development of investment technology enables investment casting to produce not only small castings, but also larger castings. The outline size of the largest investment casting is nearly 2m, while the minimum wall thickness is less than 2mm. At the same time, investment castings are also becoming more precise. In addition to linear tolerances, parts can also achieve higher geometric tolerances. The surface roughness of investment castings is also getting smaller and smaller, which can reach Ra0.4μm.