Iron mold casting with Sand casting is a casting process in which a thin layer of molding sand is coated on the inner cavity of the metal mold (called iron mold) to form a casting mold. Due to the relatively thin sand layer (4-8mm), using expensive molding materials is also economically reasonable, resulting in a significant reduction in casting quality and scrap; Due to the good rigidity of the iron mold coated with sand, the dimensional accuracy and density of the casting have been significantly improved.

The technological design and actual production of Sand casting of iron mold mainly solve the following problems:

1. The thickness of the iron mold wall and the thickness of the sand layer, as well as their combination, to meet the different requirements for solidification and cooling of castings with different wall thicknesses and materials;

2. Convenient and economical sand covering molding method to meet the surface quality and dimensional accuracy requirements of different castings;

3. Process parameters. Determination of pouring system, sand shooting system, exhaust system, etc;

4. Implementation of mass production. For example, the design and finalization of the production line and the main and auxiliary machines for sand covering;

5. Formulation of process procedures, such as pouring, cooling, and unpacking procedures, as well as adjustment of casting composition.