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Air-exhaust port sealing structure and manufacturing method thereof

A technology of sealing structure and air extraction port, which is used in manufacturing tools, glass molding, glass remolding, etc., can solve the problems of weakening the air tightness of solder performance, not necessarily good economic benefits, complicated vacuuming process, etc. Long service life, simple structure and good air tightness

Inactive Publication Date: 2015-01-21
戴长虹
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the first method is that the vacuuming process is complicated and the production efficiency is very low: because the suction pipe is very thin, the vacuum layer is very thin, the suction resistance is large, the speed is small, and single-chip extraction is required, so the production efficiency is very low; The two methods can solve the shortcomings of the first method, but because the low-temperature glass solder is made of a variety of oxides, under high temperature and vacuum, the air and moisture absorbed by the solder, volatile substances in the solder, and the solder during production The gas dissolved in the process and the decomposition of some oxides in the solder will cause a large number of bubbles in the solder, which will greatly weaken the performance of the solder, especially the air tightness, which will greatly affect the feasibility of this method.
Another method is between the above two methods, that is, prefabricating the air extraction port on the glass, then vacuumizing after sealing the edge at high temperature, and finally using solder to seal and weld the metal sheet on the air extraction port; The disadvantage is that if you use glass solder, you will encounter the same difficulties as the second method. If you use metal solder for brazing, you will encounter great difficulties in how to achieve airtight welding of small and light metal sheets under vacuum conditions. Its economic benefits are not necessarily better than the first way

Method used

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  • Air-exhaust port sealing structure and manufacturing method thereof
  • Air-exhaust port sealing structure and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0059] Embodiment 1: see figure 1 , the vacuum glass is composed of upper glass 1 and lower glass 2, a through hole is drilled on the upper glass 1 to form an air inlet, and the glass is coated or printed on the lower surface of the upper glass 1 and the upper surface of the lower glass 2. Paste or metal paste printing are respectively made into an upper insert 4 and two lower joints 5 concentric with the air inlet, the upper insert 4 of the upper glass 1 can be inserted between the two lower joints 5 of the lower glass 2, and the upper There is an air extraction channel between the insert 4 and the lower joint 5; send the upper and lower glasses into a high-temperature furnace or tempering furnace to sinter the upper insert 4 and the lower joint 5 on the upper and lower glass, and then use low-temperature glass solder in the normal-pressure high-temperature furnace In the middle, edge sealing is carried out on the upper and lower glass after assembling. After the glass after ...

Embodiment 2

[0060] Example 2: see figure 2 , the vacuum glass is made up of upper glass 1 and lower glass 2, on the upper glass 1, a through hole with a large upper opening and a smaller lower opening is drilled to form an air extraction port, and a metal or glass tube with an edge is prepared as the upper insert 4, the upper The edge of the insert 4 and the upper glass 1 are welded together by glass solder or metal paste, and the top of the upper insert 4 is lower than the upper surface of the upper glass 1; a metal or glass tube with a bottom is prepared as the lower joint 5, and the lower Connector 5 and upper insert 4 are connected together or directly placed on the lower glass or placed in the pit on the lower glass; when upper insert 4 adopts a metal tube, preferably a metal with a thermal expansion coefficient close to the glass such as Kovar alloy, the upper insert 4 and When the lower joint 5 adopts glass tube, it is preferable to apply metal paste at the junction to strengthen ...

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Abstract

The invention relates to an air-exhaust port sealing structure which is characterized in that upper glass of vacuum glass is perforated, such that an air-exhaust port is formed; an upper insertion part and a lower accommodation part are manufactured, wherein the upper insertion part is connected with the upper glass in a sealed manner, the lower accommodation part can retain liquid, and the upper insertion part is inserted into the lower accommodation part; after edge-sealing of the upper and lower glass, a metal solder is placed into the air-exhaust port or the upper insertion part; the air-exhaust port is vacuumed and heated, such that the metal solder is molten into liquid; the liquid is retained in the lower accommodation part, and the upper insertion part or the lower end thereof is also immersed in the liquid; according to a liquid sealing principle, the air-exhaust port is automatically sealed; when the temperature is reduced, the liquid is solidified, such that air-tight sealing of the air-exhaust port is realized. The method provided by the invention can be used in mass productions. With the method, vacuum glass production efficiency and qualification rate can be greatly improved, and production cost can be reduced.

Description

technical field [0001] The invention belongs to the field of vacuum glass, and in particular relates to a sealing structure of an air suction port and a manufacturing method thereof. [0002] Background technique [0003] The existing vacuum glass is generally composed of two or three pieces of flat glass. The glass is sealed with low-temperature glass solder around the edges, and there is a tiny support in the middle. A thin layer of 0.1-0.2mm thickness is formed between the two pieces of glass by pumping air. Vacuum layer. Since there is no heat and sound transmission of gas, and the inner surface of the glass can have a transparent low-heat radiation film, the vacuum glass has good heat insulation and sound insulation effects, and is one of the best performance energy-saving glasses. [0004] The key technologies of the existing vacuum glass include: one is edge sealing, the other is the placement of supports, and the third is the acquisition and maintenance of vacuum. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B23/24
CPCY02P40/57
Inventor 戴长虹
Owner 戴长虹
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