Common problems in the low pressure casting process

Low-pressure casting is widely used in metal processing technology and plays a huge role in my country’s modern industry. With the widespread use of low-pressure casting in my country, its drawbacks have also been exposed.

1.Oxidation slag inclusion

The reason for the occurrence of oxidized slag inclusion is generally due to the uncleanness of the charge, or the charge is used too many times during use, and there is another reason that can lead to oxidized slag inclusion in the low-pressure casting process, that is, the casting system Poor design, improper setting during filling.

2. Stomas, shrinkage holes

Porosity problem is the most common in the low pressure casting process. It is usually caused by poor exhaust of the mold tool, poor spraying of the mold coating system, and improper setting of the cooling ring, which can also lead to the generation of pores and shrinkage.


In the process of low-pressure casting, cracks are very common. Unreasonable mold design, sharp corners, and differences in wall thickness will most likely lead to cracks. If you want to eradicate cracks, it is inevitable to improve the structural design of the mold. The choice of the mold is only helpful to the solution of the problem if the design of the mold is reasonable.

Low-pressure casting technology is very common in our country’s processing technology. With the development of technology, its drawbacks have become increasingly apparent. Only by analyzing the root cause of the problem can we better solve the problem.

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