Low-pressure casting machines generally use permanent metal molds,and the materials are generally 40Cr, 38Cr, H13, HM3, and the like.
In addition, low-pressure casting machines can also use sand mold, gypsum mold, graphite mold, investment shell molds and so on.
The mold should be preheated to 300 degrees Celsius before use, and the mold temperature should be maintained between 200-400 degrees Celsius throughout the casting process.