Thermal tempering production method and equipment for thin glass

Abstract

The present invention relates to a thermal tempering method and equipment for a 2-3 mm thickness thin glass for solar cells, solar reflective mirrors, LED display panels, vacuum glasses and the like. According to the present invention, a precise-uniform heating and liquid nitrogen quenching-wind grating annealing tempering method and equipment are adopted to achieve thermal tempering of the thin glass; the thermal tempering equipment for the thin glass mainly comprises three parts such as a glass heating part, a quenching part and a computer center control system; liquid nitrogen is adopted as a glass tempering quenching cold source so as to substantially reduce a temperature of a cooling medium, rapid cooling-heating is performed to achieve the tempering temperature, and then wind grating annealing is performed, such that the thin tempering glass achieves the required tempering degree; precise-uniform heating, ring tooth-shaped quartz ceramic roller use and other technologies are adopted to improve flatness of the thin tempering glass; and a bending strength of the thin tempering glass can be 4-8 times the bending strength of the raw glass sheet, an impact strength is increased by 5-10 times, and the flatness meets use requirements, wherein the bending strength is more than 200-400 MPa.

Description

technical field [0001] The invention relates to a thermal tempering production method and equipment for thin glass, in particular to a thermal tempering method and equipment for thin glass with a glass thickness of 2 mm to 3 mm, which are used for solar cells, solar reflective mirrors, LED display panels and vacuum glass. Background technique [0002] Glass is a brittle material, weak and fragile, and the shards are sharp and harmful. For this reason, after studying the microstructure and properties of glass, glass scientists invented the method of quenching glass to generate permanent residual compressive stress on the surface of glass, which improves the strength of glass, resistance to rapid cooling and heat, and reduces its damage. This glass is called tempered glass, and its production method is called thermal-tempering of glass. [0003] High-tech products such as solar cells, solar reflectors, LED display panels and vacuum glass, which have developed rapidly in recen...

AI Technical Summary

Problems solved by technology

However, since thin glass is more likely to be deformed during heating, for the thermal tempering production of thin glass, the above technology needs to be further improved and enhanced

For example, the study found that the passive control method of the heating element and the entry and exit of the glass caused temperature fluctuations and reaction hysteresis, which affected the precise and uniform heating of the glass; The radiation heat transfer between the rollers and the large amount of contact between the quartz ceramic roller surface and the glass will cause the glass temperature to be uneven

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