Graphite powder has good coating properties as follows: We coat graphite powder on the solid surface to form a smooth film with firm adhesion. The graphite powders often used in casting release agents are: cryptocrystalline graphite powder (earth graphite powder, other names are black lead powder, microcrystalline graphite powder).
Casting is generally determined according to the surface requirements of the castings, and can be divided into the following two types: ordinary casting and precision casting. Casting refers to a method of smelting metal, making a mold, and then pouring the molten metal into the mold. After solidification, a metal part blank with a certain size, shape and performance will be obtained.
Casting is a process in which metal is smelted into a liquid that meets certain requirements and poured into a mold, then cooled, solidified, and cleaned to obtain a casting with a certain size, shape and performance. Casting is one of the basic processes of modern device manufacturing industry.
The metals to be cast include: aluminum, tin, lead, copper, iron, etc. The materials of ordinary castings are resin, water glass, clay, raw sand and other auxiliary materials. Special casting molds include: ceramic mold casting, metal mold casting, lost foam casting, investment casting, etc. Graphite powder has a good lubricating effect, which improves the compact fluidity of the molding sand, reduces the air permeability, reduces the ejection resistance of the sample, and improves the mold release performance of the molding sand.