During die casting production process

due to the local high temperature of the mold

sintering and aluminum sticking will occur in the local high temperature hot spot of the mold

which not only affects the appearance quality of the casting

but also destroys the dense layer on the surface of the casting

leading to leakage of casting gas tightness detection or the risk of leakage. In the process of die casting filling

drawing die or serious crack phenomenon often appear due to the direct erosion of liquid aluminum. After shot blasting

the appearance of castings is affected by peeling

which can’t meet customer needs. In view of the above casting appearance problems

the partial coating treatment of the die casting mold was proved to solve the above casting appearance defects with simple operation.