What types of casting are available
Casting is a kind of metal thermal processing technology that humans have mastered relatively early. Today, I will introduce to you in detail what types of casting are available.
1. Sand Casting
Using sand as a mold material, sand with different compositions can be subdivided into Green Sand Mold, Dry Sand Mold, etc., but not all sand can be used for casting.
The advantage is that the cost is lower, because the sand used in the mold can be reused; the disadvantage is that the production of the mold is time-consuming, the mold itself cannot be reused, and the finished product can only be obtained after destruction.
2. Die Casting
Use a metal with a higher melting point than the raw material to make a mold. Among them, it is subdivided into gravity casting method, low pressure casting method and high pressure casting method.
Subject to the melting point of the mold, the metal that can be cast is also limited.
3. Lost wax method (Investment Casting, Lost-wax casting)
This method can be the outer film casting method and the solid casting method.
First copy the object to be cast with wax, then immerse it in a ceramic-containing bath and wait to dry, so that the wax replica is covered with a ceramic outer film, and the steps are repeated until the outer film is sufficient to support the casting process (about 1/ 4 inch to 1/8 inch), then melt the wax in the mold and pull out of the mold. After that, the mold needs to be heated many times to increase the hardness before it can be used for casting.