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A tempered glass cooling method and a tempering 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 increased power consumption, increased cost, increased fan capacity, etc., to reduce air pressure and reduce operation. Cost and effect of reducing installed capacity

Active Publication Date: 2016-04-06
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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  • A tempered glass cooling method and a tempering furnace cooling system
  • A tempered glass cooling method and a tempering furnace cooling system
  • A tempered glass cooling method and a tempering furnace cooling system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: Production of ordinary tempered glass

[0026] This example compares the effects of ordinary tempering and tempering by using 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 liquid nitrogen-cooled tempered glass of the present invention are tested, and the results are compared;

[0028] Tempering conditions and operations:

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

Embodiment 2

[0034] Example 2: Production of thin-layer tempered glass

[0035] For thinner glass, such as 3mm glass, because the glass is thin, it is difficult to form an effective stress layer inside the glass. Therefore, the ordinary wind tempering method has no obvious effect on 3mm glass, and generally does not use wind tempering.

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

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

[0038] Detection: the same as in Example 1, the data obtained by the polarizer stress meter measurement are shown in Table 2.

[0039] Table 2: Strength ...

Embodiment 3

[0043] Example 3: Production of tempered glass

[0044] In this application, over-tempered glass refers to a tempered glass with an additional strength of more than 105 MPa for 12mm glass based on the strength of the original glass sheet through a physical toughening process. The ordinary wind tempering method cannot produce tempered glass due to the insufficient cooling capacity of the equipment.

[0045] In this example, a group of samples of 12 mm glass were tempered by the method of the present invention, and tempered glass was produced.

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

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

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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 particularly relates to a cooling system and method for tempered glass. Background technique: [0002] Tempered glass products have been widely used in construction, aviation, automobiles, ships, locomotives, electronic display devices and many other fields. Tempered glass was first patented in France in 1870, followed by several patents in the nineteenth century and industrial application in 1892. After that, a series of products such as flat tempered glass and curved tempered glass were developed. By the 1980s, with the increase of new types of glass, the tempered glass manufacturing industry has carried out the development and research of new products, which are in the low-end building energy-saving windows. Radiation glass tempering, large-scale and heterosexual glass tempering of automobile glass have made great progress. [0003] Physically tempered glass is to form a compressive stres...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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