The Characteristics Of Gravity Casting

Casting can divide into gravity casting and pressure casting. Gravity casting is refers to the process that the metal liquid pulled into a mold with the gravity by earth. It is also called casting. Its process are melting, pouring the filling, exhaust, cooling, mold, heat treatment and so on. Sand casting and gravity casting are used most  most commonly and relative in lowest price.
Certainly gravity casting also has its own characteristic. Porosity of castings is little and heat treatment can be carried out. Strength of the product can be improved after heat treatment and even more than die-casting products.
Products in low dense. Its strength is slightly lower, but its elongation is in more low dense. The product surface finish is not high. Casting products is easy to form pit which is similar to blasting after cooling the surface. Usually the mold made by gravity casting is in longer service life and lower cost. The process of gravity casting is also simple. It is not suitable for processing thin wall parts.
Metal casting is made of metal material and it is a process that put the melt metal poured into the mold for casting under the gravity. One piece can pouring hundreds to tens of thousands times. So it is also called permanent mold casting. The metal mold casting is not only suitable for  the aluminum alloy, but also the production of iron and steel metal casting.