Low-pressure casting refers to placing the mold above a sealed crucible, and then introducing compressed air into the crucible to generate low pressure on the surface of the molten metal (0.06~0.15MPa), so that the molten metal rises from the crucible. The riser tube fills the mold and controls the solidification casting method. This casting method has a good feed and a compact structure. Large thin-walled complex castings without risers are easy to cast, and the metal recovery rate can reach 95%. No pollution, easy to realize automation. However, the equipment cost is high and the production efficiency is low. Usually used for casting non-ferrous alloys.

But at present some people still do not understand low pressure casting. Casting processes can generally be divided into two categories: high-pressure casting and low-pressure casting, and there are many differences between them. But what is certain is that whether it is high-pressure casting or low-pressure casting, it has more advantages than other casting methods. Let's take a look at it briefly.

Through the comparison of different castings, it can be found that the quality of the castings obtained by low-pressure casting is good, not only the surface finish can reach a high level, but also the strength and hardness of the castings are also high. In addition, the castings formed in the pressure casting process have high dimensional accuracy and good interchangeability.

With these advantages, low-pressure casting can meet the requirements of manufacturing thin-walled complex castings. In addition to the quality of the die casting, there is no need to worry about it, and its production efficiency has also been recognized. Coupled with the long life of the die-casting mold, it is easy to realize mechanized and automated production.

The castings formed by low-pressure casting can be used directly without other mechanical processing, which not only shortens the time and improves the efficiency, but also reduces the waste of metal materials to a certain extent.

Low pressure casting is a kind of pressure casting. This is a casting technique done at low pressure. The low pressure environment allows the liquid or semi-liquid metal to fill the die casting cavity at a high rate and form and solidify under pressure to obtain the desired casting. In this process, the casting pressure and speed can be adjusted, so it is more suitable for various casting molds, as well as casting various alloys and castings of various sizes.