Low pressure casting is a casting method in which liquid alloy is pressed into the mold cavity from bottom to top under pressure and solidified under pressure to obtain castings. Let's learn more about it!
The principle of low-pressure casting is that dry compressed air or inert gas is introduced into the sealed crucible to make the metal liquid smoothly fill the mold from bottom to top along the riser through the sprue with the help of the pressure acting on the metal liquid level. The filling pressure is generally 20 ~ 60kpa.
Low pressure casting production process includes the following four basic processes:
1. Metal melting and preparation of molds or molds.
2. Preparation before pouring: including sealing of crucible, slag removal in liquid riser, measurement of liquid level height, sealing test, mold matching, fastening of mold or mold, etc.
3. Pouring: including liquid lifting, mold filling, pressurization, solidification, pressure relief and cooling, etc.
4. Demoulding: including loose mold demoulding and casting removal.
The above content is the principle and production process of low-pressure casting. During the casting process, the staff must follow the normal operation mode to ensure personal safety.
