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A sealing method of flat vacuum glass

A technology for vacuum glass and flat glass, applied in the field of flat vacuum glass sealing, can solve the problems of low yield, many types of equipment, structural failure, etc., to achieve high yield, improve production efficiency, and avoid stress concentration.

Active Publication Date: 2022-04-22
深圳理大科技产业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] (1) The existing vacuum glass manufacturing technology divides sealing and vacuuming into two processes, which require many types of equipment and low efficiency;
[0018] (2) Due to technological limitations, the existing vacuum products are all designed with a suction port (front or side), and the location of the suction port will produce a stress concentration point due to the discontinuous structure, which may be affected by external wind pressure or thermal stress during long-term use Fragmentation occurs
[0019] (3) In the existing sealing process of vacuum glass, because the existing heat sealing method cannot accurately control the thickness uniformity of the sealing layer, internal stress will be generated during the subsequent vacuuming process. If the stress exceeds the strength limit of the material, then Will make the structure fail, so the yield is not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Use 3mm thick float sodium calcium glass as the glass substrate; use tinned copper strip as the sealing metal material, its width is 5mm, thickness is 0.4mm, coating thickness is 40μm, and the specific tinning material is SnAg3.5; The high-temperature sintering type connecting silver paste is a metallized layer, which is applied to the sealing position by screen printing, and fixed by sintering at 700°C for 60s (with glass tempering) to form a metallized layer with a thickness of 20 μm and a width of 6 mm; 304 stainless steel is turned into 0.4mm high, 0.8mm diameter non-chamfered cylinders as support columns, and arranged into a matrix with a spacing of 40mm by automatic machinery.

[0082] Then carry out manual pre-assembly, and the wavy tinned copper strips formed by assembly have a gap of no more than 0.05mm and are randomly arranged. It is then sent into a vacuum processing chamber that is compressed with air bags. The vacuum chamber is made of 304 stainless steel...

Embodiment 2

[0086] Use 5mm thick float soda lime glass as the glass substrate; use tin-lead (SnPb40Ag1) metal material to make high-density square frame preforms with a width of 4mm and a thickness of 0.5mm; use high-temperature sintered silver-containing paste Material (for the metallization layer, applied to the sealing position by screen printing to form a wet film with a width of 6mm and a thickness of 20 microns, and dried at 150°C for 10 minutes, then sintered at 700°C for 3 minutes (with glass tempering) Fixed to form a metallized layer with a thickness of 14 μm and a width of 6 mm; 304 stainless steel is used to turn and process a non-chamfered cylinder with a height of 0.4 mm and a diameter of 0.8 mm as a supporting column, and arrange it into a matrix with a spacing of 40 mm by automatic machinery.

[0087] Then pre-assembled to form a structure of glass-metallized layer-pre-assembled part-metalized layer-glass to ensure the flatness of the pre-assembled part, and set a horizonta...

Embodiment 3

[0091] Use 5mm thick float soda lime glass as the glass substrate; use low melting point glass powder (85wt%) to mix terpineol (14.5wt%) and ethyl cellulose (0.5wt%) to make a viscous slurry through a three-roll mill material. Apply the paste to the sealing area around the glass plate to form a wet film with a width of 6mm and a thickness of 0.6mm. Then, 304 stainless steel was turned into a non-chamfered cylinder with a height of 0.4mm and a diameter of 0.8mm as a support column, which was arranged into a matrix with a pitch of 40mm by automatic machinery, and the upper cover glass was aligned and combined.

[0092] Set horizontal limit fixtures on the outside of the combined glass to avoid glass movement caused by air flow during the vacuuming process. It is then sent into a vacuum processing chamber that is compressed with air bags. The vacuum chamber is made of 304 stainless steel, equipped with a mechanical pump and a molecular pump unit for vacuuming, and the ultimate ...

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Abstract

A method for sealing flat vacuum glass, comprising: in a vacuum chamber, heating a pre-assembled part including flat glass, a sealing material and a support, and simultaneously evacuating the vacuum chamber to remove gas inside the pre-assembled part , and then apply pressure perpendicular to the horizontal direction of the glass to the pre-assembled parts to achieve sealing, and finally cool and solidify to obtain a sealed flat vacuum glass. This method is a one-step process. Pressure is applied in the vacuum chamber to make the material flow to form a stable structure and heat to seal, so that the sealing and vacuuming can be carried out at the same time. Compared with the traditional technology, the production efficiency is improved. When the sealing material is softened, the hot pressing process is used to make the material flow to a certain extent to form a stable structure that avoids stress concentration, and the yield is higher than that of traditional technology.

Description

technical field [0001] The invention relates to the technical field of vacuum glass manufacturing, in particular to a method for sealing flat vacuum glass. Background technique [0002] Flat vacuum glass is a glass deep-processing product that forms a vacuum-tight layer between two parallel flat glasses to achieve heat and sound insulation. Among them, the vacuum sealing layer realizes airtightness by sealing its surroundings with specific materials, and a specific arrangement of supports (such as support columns) is arranged in the sealing layer to support the external atmospheric pressure to maintain the shape of the vacuum layer. [0003] Hermetic sealing of vacuum glass is the key technology of vacuum glass. Sealing refers to the process of forming an airtight sealing layer with a certain mechanical strength by using a specific material to connect with flat glass. At present, the production of vacuum glass has the following sealing technology routes according to the se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C27/10
CPCC03C27/10C03C27/08
Inventor 宋驁天杜争叶岩曹雪峰王墨涵郑剑锋
Owner 深圳理大科技产业有限公司
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