The common method of aluminum die casting is to melt molten aluminum at high temperature,

 

High pressure and high-speed injection molding, but in the process of injection molding, it is easy to form pores, resulting in poor mechanical properties of castings.

 

Nissen door adopts vacuum casting aluminum, that is, vacuum method,

 

During die casting, the gas in the cavity is extracted to form a certain vacuum or negative pressure state,

 

The cavity is filled with liquid metal in vacuum, so that the porosity in the casting is avoided,

 

Improve the mechanical properties of castings,

 

It has the advantages of fine surface lines, high density and high mechanical strength.