Method for sealing edge of vacuum glass

Abstract

The invention provides a method for sealing edge of vacuum glass. The method is characterized in that: a glass soldering material is put on the periphery of a vacuum glass raw sheet; and an inner impermeable layer is arranged at the inner side of the glass soldering material so that the glass solder liquid is limited to flowing into the inner cavity of the vacuum glass raw sheet, wherein the inner impermeable layer is made from powdery or fibrous materials.

Description

technical field [0001] The invention belongs to the technical scope of vacuum sealing of glass, and in particular relates to a vacuum glass edge sealing method. Background technique [0002] In the vacuum glass sealing technology, the design of the edge sealing structure is the key technology to ensure that the periphery of the flat vacuum glass is not deformed, does not produce excessive stress, and does not leak air. In Chinese patent ZL94192667.2 "Method for manufacturing vacuum glass windows" Among them, the edge sealing structure is designed so that two pieces of glass are of different sizes, and the low melting point glass solder is placed on the edge steps. The melted glass solder flows into the gap between the glass plates due to capillary phenomenon. This method requires a large amount of solder, and the edges of the vacuum glass are uneven. When the two glasses are installed vertically, the force is uneven, the mechanical strength is not high, and the stress of the...

AI Technical Summary

Problems solved by technology

The melted glass solder flows into the gap between the glass plates due to capillary phenomenon. This method requires a large amount of solder, and the edges of the vacuum glass are uneven. When the two glasses are installed vertically, the force is uneven, the mechanical strength is not high, and the stress of the low-melting point glass solder is relatively large. Disadvantages. In the Chinese patent zL95108228.0 "vacuum flat glass and its manufacturing method" and zL96208977.X "vacuum flat glass", the edge of the glass plate is first "chamfered" and the solder is placed in the chamfering groove. To solve the above problems, but there is difficulty in distributing powder and low-melting point glass brazing material is easy to lose and not easy to enter the gap between glass plates when heating and sealing, and it is easy to cause the problem of poor air tightness

Chinese patent zL02256440.3 "Edge Sealing Structure of Vacuum Glass" proposes to put auxiliary sealing strips on the upper periphery of the lower flat glass to prevent the loss of solder liquid. None of the inward flows mentioned

But when the distance between the upper and lower layers of glass is greater than 0.5mm, the flow resistance is small, or the temperature of the welding glass melt is high and the viscosity is low, in this case the welding glass melt is easy to flow into the inner cavity of the vacuum glass original plate, patent CN1676481A and patent Application number 022564403 cannot produce vacuum glass

My application number is 2006101390039 "One-Step Forming Vacuum Glass and Its Manufacturing Method and Equipment" is a one-time forming vacuum glass. Because of one-time forming vacuum glass, there is no air extraction hole on the vacuum glass, and the gas in the middle of the original vacuum glass plate is passed through the anti-seepage layer and The welding glass powder is drawn out, which requires the anti-seepage layer to have good air permeability before the welding glass powder is melted, and the glass strip is a dense solid airtight, so it is very difficult to pump the anti-seepage layer made of glass strips

In the vacuum furnace, a large amount of gas will overflow from the molten glass powder during the melting process of the welding glass powder, which reduces the viscosity of the molten glass powder, and the molten glass powder can easily flow into the middle area of ​​the original vacuum glass plate. cause seal failure

Images