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Toughened glass cooling method and toughening furnace cooling system

A technology of tempered glass and cooling method, applied in the direction of tempering glass, glass manufacturing equipment, manufacturing tools, etc., can solve the problems of increasing fan capacity, increasing cost, increasing power consumption, etc., reducing installed capacity, reducing Operating cost, effect of reducing air pressure

Active Publication Date: 2013-03-20
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in view of the fact that the cooling medium used in wind tempering is air, and the temperature and heat capacity of the air itself lead to its limited cooling capacity, even if the wind pressure is increased, it cannot be applied to tempered thin glass (such as glass with a thickness less than or equal to 3mm) and special requirements. tempered glass
At the same time, increasing the wind pressure means increasing the capacity of the fan, a rapid increase in power consumption, and a substantial increase in cost

Method used

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  • Toughened glass cooling method and toughening furnace cooling system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: Production of ordinary tempered glass

[0026] This embodiment compares the effects of ordinary tempering and tempering with the cooling system of the present invention.

[0027] Sample: 6mm glass, the corresponding labels of the same glass are divided into 2 groups, a total of 12 pieces of glass are divided into 2 groups for testing, and the strength of ordinary air-cooled tempered glass and the strength of liquid nitrogen cooled tempered glass of the present invention are tested, and the results are compared;

[0028] Tempering conditions and operation:

[0029] In a small tempering furnace, the installed capacity of the fan is 30KW, and the temperature at the air inlet of the tempering furnace is 35°C in summer. A liquid nitrogen tank with a volume of 20 liters is installed at the upper part of the air collecting box at the back of the tempering furnace fan, and it is filled with liquid nitrogen before the air cooling is started and sealed. 5 seconds ...

Embodiment 2

[0034] Embodiment 2: Production of thin tempered glass

[0035] For thinner glass, such as 3mm glass, it is difficult to form an effective stress layer inside the glass due to the thinner glass. Therefore, the effect of ordinary wind tempering methods on 3mm glass is not obvious, and wind tempering is generally not used.

[0036] In this embodiment, the corresponding 3mm glass sample is tempered by using the method of the present invention and the common tempering method.

[0037] Tempering conditions and operations are the same as those in Example 1, wherein the blower blowing speed is 10m 3 / S, the injection volume of liquid nitrogen is 20 liters, and the injection is completed in 10 seconds; the temperature of the mixed cooling medium at the air inlet of the tempering furnace is minus 20°C, and the mixed cooling wind speed is 12m 3 / second.

[0038] Detection: Same as in Example 1, the data obtained by the polarizer strain gauge are shown in Table 2.

[0039] Table 2: St...

Embodiment 3

[0043] Embodiment 3: Production of tempered glass

[0044] In this application, over-tempered glass refers to tempered glass with an additional strength exceeding 105MPa obtained through physical tempering on the basis of the strength of the original glass sheet for 12mm glass. The common air tempering method cannot produce tempered glass due to insufficient cooling capacity of the equipment.

[0045] In this embodiment, a group of 12mm glass samples are tempered by the method of the present invention to produce tempered glass.

[0046] Tempering conditions and operations are the same as those in Example 1, wherein the blower blowing speed is 100m 3 / S, the injection volume of liquid nitrogen is 20 liters, and the injection is completed in 10 seconds; the temperature of the mixed cooling medium at the air inlet of the tempering furnace is minus -20°C, and the mixed cooling wind speed is 12m 3 / second.

[0047] Detection: Use a polarizer stress meter to detect the surface st...

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Abstract

The invention relates to a toughened glass cooling method and a toughening furnace cooling system. The toughening furnace cooling system comprises a blower for supplying air into a toughening furnace, an air collection box and an air supply channel and further comprises a liquid nitrogen container which is mounted on the air collection box or the air supply channel and used for containing liquid nitrogen, wherein in a glass quenching stage, liquid nitrogen is filled into the air collection box connected with the blower within a short time to perform a quenching process while air is supplied by the blower, so that a mixed cooling medium of air and gasified liquid nitrogen can be formed in the air collection box, and the mixed cooling medium is supplied into the toughening furnace through the air supply channel to quench high-temperature glass in the toughening furnace. According to the invention, the temperature of the traditional cooling medium air in air glass toughening can be greatly lowered, and the installed capacity of the blower can be reduced. Thus, the invention can be used for toughening float glass having a thickness less than 3 mm or producing over-toughened glass.

Description

Technical field: [0001] The invention belongs to the field of glass tempering, and in particular relates to a cooling system and method for tempered glass. Background technique: [0002] Tempered glass products have been widely used in many fields such as construction, aviation, automobiles, ships, locomotives, and electronic display devices. Since the first patent of tempered glass was obtained in France in 1870, several patents were obtained in the 19th century, and it was applied industrially in 1892. Later, a series of products such as flat tempered glass and curved tempered glass were developed. In the 1980s, with the increase of new types of glass, the tempered glass manufacturing industry carried out new product development and research. Radiation glass tempering, large-scale automotive glass and heterosexual glass tempering have made great progress. [0003] Physically tempered glass is to form a compressive stress layer on the surface of the glass, so that it adds...

Claims

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Application Information

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IPC IPC(8): C03B27/04
Inventor 吴云龙左岩杨磊张保军赵芳红傅国英
Owner CHINA BUILDING MATERIALS ACAD
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