The process of sodium silicate shell has been produced for nearly 50 years in China. Through the unremitting efforts of colleagues in the investment casting industry for half a century, the application and research of sodium silicate shell process have reached a very high level. Over the years, the strength of sodium silicate shell has doubled due to the improvement of the refractory for the back shell and the popularization and application of new hardeners. Low cost, short production cycle, excellent shelling performance and high permeability are still the advantages of any other shell molding process.

The principle and steps of water glass precision casting. Water glass is a common raw material in the investment casting industry, and also a common process of precision casting in major investment casting factories and enterprises. The principle and detailed steps of sodium silicate investment casting industry are introduced as follows: melt the glass and mold it. Generally, after the mold is manufactured, the glass melt is injected into the mold or the glass fragments are stacked in the mold with the mold made in advance, and the mold is put into the furnace for melting, and the mold with glass area is annealed after matching.