Sand coated iron mold casting is a casting process in which the inner cavity of metal mold (called iron mold) is covered with a thin layer of molding sand to form a mold.
Because the sand layer is relatively thin (4 ~ 8mm), it is economically reasonable to use expensive high-quality molding materials. As a result, the casting quality is greatly improved and the waste products are significantly increased; Because the iron mold covered with sand has good rigidity, the dimensional accuracy and graininess of the casting are obviously improved.
The characteristic of metal mold precision casting is that the casting will not damage the mold in the process of taking out. The mold can be reused to produce a large number of the same castings.
Compared with coated sand casting, the castings produced by metal mold precision casting have finer grain structure and higher mechanical properties.