Issues that should be paid attention to in aluminum alloy low-pressure casting process
1. Slag inclusion oxidation
The reason for the occurrence of oxidized slag inclusions is generally that the charge is not clean, or the charge is used too many times during use. The low pressure pouring wheel is poorly designed and improperly set during filling.
2. Stomata and contraction
Porosity problem is the most common problem in low pressure casting process. It is generally caused by poor venting of the mold, poor spraying of the mold coating system, and improper setting of the cooling ring, which can also lead to the occurrence of pores and shrinkage cavities.
3. Cracks
During the low pressure casting process, cracks are very common. The mold design is unreasonable. Sharp corners and differences in wall thickness can cause cracks. In order to eradicate cracks, the structural design of low-pressure die-casting molds must inevitably be improved. Only a reasonable design of the mold can help solve the problem.