Status And Technological Characteristics Of Precision Casting Industry In China

- Dec 22, 2017-

The scale of precision casting industry in China mainland China has been established in the the mid 1950s, and gradually popularized, but the real rapid development in the more than 10 years since the early 1990s, especially in recent years. At present, China's investment casting has two kinds of level of technology, the first type of enterprises using medium-WENMO material mold and silica sol or ethyl silicate binder shell of the investment casting process, that is, the international general investment casting process. The second type is to adopt low-temperature mold material and water glass binder shell process, the casting size accuracy and surface roughness is worse than the first type, and the international investment casting level is not reached. According to the situation of the mainland, there is also the use of medium or low temperature mold material, surface layer using silica sol, strengthening layer using water glass shell composite process, can ensure higher dimensional accuracy and surface quality of the case to reduce costs.