The funnel is a cylindrical object which USES new cast iron material including low tin cast iron, copper chromium cast iron, medium silicon thin, medium silicon molybdenum rare earth, low tin creep iron, low aluminum vermicular iron. The addition of copper, chromium, tin and other elements in cast iron can promote the generation of pearlite and improve the hardness of cast iron, so as to improve the ability of anti-chamfering and anti-wear. Add human silicon, aluminum and other elements to form dense Si02 and A1203 surface oxidation film, thus improving the surface antioxidant capacity of the mold.

The key factor of funnel service life is the heat resistance of the material, which is the resistance to oxidation and the ability to resist growth at high temperature. This depends on the matrix and the form of the graphite.