Used in glass mould, glass is expected to drop into the glass mold cavity temperature about 1100 ℃, cooled to below 780 ℃ from the mold. For this mold temperature should be dropped to below 780 ℃, as soon as possible in order to improve the production efficiency, to meet the requirements of forming speed and the cooling ability of mould is very important.

Due to mold frequently come in contact with the molten glass of 700 ℃ ~ 1100 ℃, under oxidation and thermal fatigue, growth, at the same time, the mould interface by wear due to friction with the glass, glass mold mold material should have good heat resistance, wear-resisting, corrosion resistance, thermal shock, resistance to oxidation, long resistance and thermal fatigue resistance and oxidation resistance is the main performance index. In addition, the mold is also required to be compact, easy to process, thermal conductivity, and low thermal expansion coefficient.