The advantages and disadvantages of traditional foundry techn

Casting is an industrial technology that shapes liquid metal. In China's traditional foundry industry, the most common foundry technology is sand casting. Sand casting is the casting is generated in the sand, sand casting can produce the most common metal castings such as steel, iron sand casting with low prices, easy access to materials, manufacturing methods of casting models is simple and convenient, etc., Castings or large quantities of mass production, must be well adapted Since the rise of the foundry industry, sand casting has been foundry production in the basic traditional processes. However, each sand mold can only be cast once, after the mold is formed, the mold is damaged and scrapped. Therefore, the production efficiency is relatively low, and the mold needs to be re-made continuously. Because the texture of the sand is very soft and the holes are large, the precision of the castings to be formed Low, and the surface finish is relatively poor, rough and difficult for the aerospace, aerospace and high-end automotive industry, precision castings are difficult to process Therefore, in order to improve the quality of castings, reduce processing costs, to meet aerospace, aerospace and high-end automotive industry for high-end casting needs, Emerging casting process, so the special casting of emerging casting technology came into being.