Precision casting industry conditions and process characteristics

1. Scale precision casting industry in mainland China
Although mainland China precision casting industry has been established in the mid-1950s, and gradually promote the use of the rapid development of the real but it is 12 years since the early 1990s, especially in recent years. Investment casting process, China Investment Casting process of two types of levels, first-class enterprise in temperature mold material molding and sol or ethyl silicate binder system shell investment casting process, that is internationally accepted . The second category is the low temperature mold material and sodium silicate binder system shell process, casting dimensional accuracy and surface roughness is worse than the first category, amounting to less than investment casting level. According to the continent, as well as the temperature or cryogenic mold material molding, the surface layer using the sol layer of reinforcement using waterglass made ??shell composite process, and can ensure a high dimensional accuracy and surface quality, lower costs.
2. Process level, casting quality and product category from the level of use and the quality
Has made substantial progress in all aspects of the investment casting process, have a greater impact on the development of investment casting new materials, new processes, new equipment are also many, such as water-soluble core and ceramic core, metal material improvements, large-scale casting, investment casting technology, titanium investment casting directionally solidified and single crystal casting filtering technologies, hot isostatic pressing, rapid prototyping technology, computer applications, as well as mechanization and automation technology development in the investment casting investment casting can not only produce small castings, but also the production of larger castings, the outline dimensions of the largest investment castings for almost 2m, the minimum wall thickness is less 2mm. Castings has become more sophisticated, in addition to linear tolerance, the parts can achieve high geometric tolerance. Castings are getting smaller and smaller, the surface roughness values ??can reach Ra0.4um.
3. Supporting business gradually complete
Due to the rapid development of precision casting industry, driven by supporting the rapid development of the business. Mainly in mold processing, equipment manufacturing, raw and auxiliary materials production. According to preliminary statistics, the main processing equipment manufacturing investment casting mold professional factory, has been concentrated areas of the casting plant, such as Guangdong, Shandong and Wuhan formation of special equipment factory buildings; precision casting raw and auxiliary materials production factory and suppliers has developed nearly one hundred and first class of investment casting process to produce the desired pattern materials, zircon powder, belt and other accessories and advanced equipment not yet domestic production, and every year the number of imports from abroad thousands of tons of raw and auxiliary materials. But because of China's basic industries and resource conditions are much better compared with other developing countries, therefore, the development of precision casting services industry, will also extend to the Southeast Asian countries and the world as a whole and develop their market.
4. The gap between the industry and the international level and advantages compared with the level of international investment casting
Precision casting industry applications, process production of aviation precision castings and low production, high-quality precision castings, not many, most of the production less precision fittings, hardware, harness and vehicle parts, alloy types single, especially the proportion of high-temperature alloys and non-ferrous alloys is too small, the level of China's precision casting is still very backward.
However, lower labor costs, abundant raw materials account for a large advantage in product prices, there is still much to improve the quality of the product, in the international competitiveness. Meanwhile, the rise of the domestic high-tech industry, the machinery industry have been put forward to the precision, miniaturization, as well as the construction industry regulations and local laws and regulations instead of cast iron pipe fittings, cast copper and stainless steel castings, provides unprecedented opportunities for the investment casting industry .