Ultra-thin glass chemical tempering equipment and tempering method

Abstract

The invention provides ultra-thin glass chemical tempering equipment and a tempering method. According to the tempering equipment, the height of the bottom end of a set glass-ceramic part is lower than the height of the top end of a slot frame, in the actual production process, the bottom end of the glass-ceramic part is immersed in a molten salt solution, an ultra-thin glass part capable of beingcompletely immersed into the molten salt solution, thus complete tempering of the ultra-thin glass part is guaranteed, chemical toughening is even, and the toughening performance and yield of an ultra-thin glass product are improved; moreover, the set slot frame uses materials of stainless steel products, the surface of the slot frame is sprayed and treated with Al2O3 to prevent the slot frame from being oxidized by tempered molten salt, the quality of the molten salt solution is guaranteed, in the process of tempering, the surface of a glass is prevented from being polluted by stain ion of astainless steel support, and thus the effect of tempering is improved; in addition, the equipment is compact in the structure and reasonable in design, the production of high quality tempered ultra-thin glass products can be ensured, and the equipment is suitable for promotion and use in the field of ultra-thin glasses.

Description

technical field [0001] The invention relates to ultra-thin glass chemical tempering equipment and a tempering method, belonging to the technical field of glass production. Background technique [0002] Ultra-thin flat glass generally refers to flat glass with a thickness of less than 1mm. It is mainly used in observation windows, mobile phone screens, medical cover glass, slide glass, and electronic displays. According to its use, it can be divided into liquid crystal substrate glass, cover glass, etc. Plate glass and touch screen glass, etc., the main production and preparation methods include float method, overflow method, slit method and secondary drawing method. [0003] Chemical toughened glass is to change the chemical element composition of the glass surface according to the ion diffusion mechanism, that is, generally use alkali metal ions with a small radius on the glass surface [such as Na + ] Alkali metal ions with larger radius in the molten salt [such as K + an...

AI Technical Summary

Problems solved by technology

[0004] At present, the support frame used in general chemical tempering is generally 0Cr18Ni9 stainless steel. The support frame will be in direct contact with the glass at high temperature, resulting in defects such as watermarks, water marks and rust marks during tempering, which will affect the tempering effect and cannot meet the glass requirements. High requirements with few defects

[0005] At the same time, since the thickness of ultra-thin electronic glass itself is less than 1mm, the thickness of the thinnest ultra-thin electronic glass is 0.05mm [50μm] or even thinner. When ultra-thin glass is chemically tempered, due to the buoyancy and Under the joint action of high temperature [350~460℃] and long time of 0.5-10h, the ultra-thin glass will float in the molten salt, and some parts of the ultra-thin glass may float above the molten salt, which will lead to chemical tempering The floating part of the upper part of the glass is not in contact with the molten salt of potassium nitrate, which leads to uneven chemical tempering, which causes the glass itself to generate greater stress during the chemical tempering process and damage the glass, reducing the performance and yield of ultra-thin glass products

[0006] When the ultra-thin glass is chemically tempered, the bracket in the salt tank is generally made of stainless steel, and the surface of the stainless steel bracket is Al 2 o 3 Spraying treatment to prevent the stainless steel bracket from being oxidized, thereby contaminating the chemical tempering molten salt and affecting the effect of tempering

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