Low-pressure casting is widely used in metal processing technology and plays a huge role in China's modern industry. With the widespread use of low-pressure casting in China, its drawbacks are also exposed.
I. Oxidation slag
The reason for the occurrence of oxidative slag is generally because the charge is not clean, or the use of the charge is too much during use, and there is another reason that can cause oxidative slag during the low-pressure casting process, that is, the casting system Poor design, improper setting when filling.
Second, the pores, shrinkage holes
The problem of porosity is the most common in the process of low-pressure casting. It is generally caused by poor exhaust of the mold tool, poor spraying of the mold coating system, improper setting of the cooling ring, and can also result in the generation of pores and shrinkage holes.
Third, the crack
In the process of low-pressure casting, it is very common to have cracks. The design of the mold is unreasonable. The sharp angle and the difference in the thickness of the wall will lead to the crack phenomenon. To eliminate the crack phenomenon, it is inevitable to improve the structural design of the mold. The choice of the mold is only reasonable, and it will help solve the problem.
Low-pressure casting technology is widely used in China's processing technology. With the development of technology, the drawbacks are increasingly apparent. We can only solve the problem by analyzing the root causes of the problem.