Plate glass and forming method and forming device thereof

• Main Authors: YANG PENGHUI, WANG YANXING, TANG MENGDI, LI XIANZI, WANG QI, ZU CHENGKUI, HAN TAO
• Format: Patent
• Language: Chinese; English
• Published: 05.07.2022
• Subjects: CHEMISTRY; GLASS; MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES; METALLURGY; MINERAL OR SLAG WOOL

The invention relates to plate glass as well as a forming method and a forming device thereof. The forming method uses tin liquid as a bearing platform, and comprises the following steps: melting and homogenizing raw materials for forming glass to obtain glass liquid; n2 with the volume ratio of 99% and H2 with the volume ratio of 1% are used as protective atmospheres; the molten glass is drained into the annular mold to be self-leveled; cooling in situ to cure the self-leveling glass liquid to obtain a semi-finished plate glass product; and annealing the plate glass semi-finished product to obtain the plate glass. The technical problem to be solved is how to provide the plate glass of which the equal thickness difference is-0.6 mm to 0.6 mm, the fringe degree is A, the stress birefringence is less than or equal to 6nm/cm and the optical uniformity is less than or equal to 1.5 * 10 <-5 >, and the thickness can reach more than 25mm so as to meet the application requirements of special equipment such as airplan