Preparation method of curved glass

A curved glass and glass technology, which is applied in glass pressing, glass manufacturing equipment, glass molding, etc., can solve the problems of poor heat dissipation of plastics, difficulty in opening holes, and large internal stress

Inactive Publication Date: 2017-06-13
WGTECH JIANGXI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, plastics have disadvantages such as poor heat dissipation, serious environmental pollution, and being easily eroded by organic solvents, yellowing, signal shielding or attenuation under ultraviolet rays, etc., which are not suitable for market trends.
The corrosion resistance of metal is poor, and aluminum fluoride will volatilize a large amount to produce PFCs gas, which will cause destructive effects on atmospheric ozone. It does not support the concept of green and low carbon, and it is difficult to open holes, which has a certain impact on mobile phone signals.
[0003] The use of glass housings can well solve the above-mentioned problems of plastic housings and metal housings. However, due to the fragile glass and limited elasticity, its application is limited, and almost all of them are planar designs. If it is designed as a curved surface, the internal stress at the bend Large, low compressive strength, prone to micro-cracks at bends

Method used

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  • Preparation method of curved glass
  • Preparation method of curved glass
  • Preparation method of curved glass

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preparation example Construction

[0028] see figure 1 , The method for preparing curved glass according to one embodiment includes the following steps S110-S150.

[0029] S110. Molding the melted glass clot to form a curved glass original sheet. The curved glass original sheet includes a main body and a curved portion, and the curved portion is formed by bending at least one side of the main body.

[0030] Specifically, the operation of molding the melted glass gob to form a curved glass original sheet specifically includes: using a press mold to press the glass gob under a protective gas atmosphere; and removing the press mold, and blowing the formed glass gob with airflow , to obtain the curved glass original sheet. The combination of compression molding and air blowing molding enables the glass clot to form various required shapes, and the air blowing can further stabilize the formed glass clot and reduce the occurrence of cracks. The stamping pressure of the pressing die is 7.5Mpa to 8.5Mpa, and the pres...

Embodiment 1

[0063] Under the atmosphere of nitrogen protection gas, the glass clot was pressed and formed by using a pressing mold, the stamping pressure of the pressing mold was 8Mpa, and the pressing time was 30s. The pressing mold is removed, and the formed glass clot is blown by air flow to obtain a curved glass original sheet. Use CNC engraving machine to chamfer the edge of the curved glass original piece. Place the original curved glass sheet in a polishing solution containing cerium oxide particles for grinding. The particle size of the cerium oxide particles is 1.5 μm and 3 μm. The solvent of the polishing solution is water, and the mass ratio of the cerium oxide particles to the polishing solution is 2 :100. Cerium oxide particles are used as abrasives to move relative to the surface of the curved glass to eliminate flaws and scratches on the glass surface. After running-in in the polishing solution, the curved glass original sheet was scrubbed with a 5% NaOH aqueous solution,...

Embodiment 2

[0065] Under the atmosphere of nitrogen protection gas, the glass clot was pressed into shape by using a pressing mold, the stamping pressure of the pressing mold was 7.5Mpa, and the pressing time was 40s. The pressing mold is removed, and the formed glass clot is blown by air flow to obtain a curved glass original sheet. Use CNC engraving machine to chamfer the edge of the curved glass original piece. Place the original curved glass sheet in a polishing solution containing cerium oxide particles for grinding. The particle size of the cerium oxide particles is 1.5 μm and 3 μm. The solvent of the polishing solution is water, and the mass ratio of the cerium oxide particles to the polishing solution is 1. :100. Cerium oxide particles are used as abrasives to move relative to the surface of the curved glass to eliminate flaws and scratches on the glass surface. After running-in in the polishing solution, scrub the curved glass original sheet with a 2% NaOH aqueous solution, and...

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Abstract

The invention discloses a method for preparing curved glass. The melted glass clot is molded to form a curved glass original sheet, and then the curved glass original sheet is softened at a preset temperature. Cooling after softening can eliminate internal stress and reduce crack. After the original curved glass sheet is cooled, it is soaked in potassium salt solution for strengthening. After that, an acid-resistant film is attached to the surface of the main body and the curved part is exposed. The curved part can react with the acid solution to form silicate, so that the curved part of the curved glass can reach the purpose of reinforcement. Then cover the raw material of the protective layer on the surface of the original curved glass sheet, which can prevent static electricity and protect the surface of the curved glass, further preventing the occurrence of micro-cracks. Experiments have shown that the curved glass prepared by the above-mentioned method for preparing curved glass can withstand the tests of abrasion resistance, acid and alkali resistance, etc., has high compressive strength, and is not prone to microcracks at the bend.

Description

technical field [0001] The invention relates to the technical field of glass preparation, in particular to a method for preparing curved glass. Background technique [0002] In the past, the main competition of electronic products such as mobile phones and tablet PCs focused on the size of the screen and the specifications of semiconductors. However, since the development of electronic products, they have begun to lack the "uniqueness" differences that can attract consumers to buy. However, the specifications of electronic products are similar, and the main thing is to improve the material to achieve different shape designs. The material of the casing of general electronic products is mainly plastic or metal. However, plastics have disadvantages such as poor heat dissipation, serious environmental pollution, being easily eroded by organic solvents, yellowing under ultraviolet light, signal shielding or attenuation, etc., which are not suitable for market trends. The corro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B25/00C03C21/00C03C23/00C03C17/00C03B11/00
CPCC03B25/00C03B11/00C03C17/007C03C17/009C03C21/002C03C23/0095C03C2217/445C03C2217/475C03C2217/476C03C2217/485C03C2218/112
Inventor 易伟华张迅周慧蓉张伯伦
Owner WGTECH JIANGXI
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