Metal solder-microwave welded and groove-edge-sealed convex vacuum glass and manufacturing method thereof

Abstract

The invention relates to vacuum glass. The vacuum glass is characterized in that each of upper glass and lower glass is convex glass, an edge sealing strip frame is arranged at the welded periphery of the upper glass, an edge sealing groove is arranged at the welded periphery of the lower glass, and the upper glass and the lower glass are welded together by utilizing metal or alloy solder in a microwave oven; and the manufacturing of the vacuum glass is simpler and more convenient, and the matching of the edge sealing strip frame and the edge sealing groove can ensure a good sealing effect. The method has the advantages of simpleness in manufacturing process, low cost, high production efficiency, reliability in sealing and connecting and good sealing effect; the one-step large-batch preparation of the vacuum glass without exhaust ports can be realized by utilizing the technology, and the manufactured vacuum glass is strong in resistance to wind pressure and good in heat insulation and sound insulation; and the method can be used for manufacturing the ordinary vacuum glass and is particularly suitable for manufacturing tempered vacuum glass.

Description

technical field [0001] The invention relates to the processing and manufacturing of vacuum glass, in particular to a method for making vacuum glass and its products. Background technique [0002] Vacuum glass is a new type of energy-saving and environmentally friendly product, which can be widely used in industrial and agricultural fields such as building doors and windows, glass curtain walls, solar products, agricultural greenhouses, refrigerators and refrigerators, and daily necessities for residents. Soundproofing and finishing materials. In the process of making vacuum glass, the structure and technology of edge sealing is the key technology to ensure that the periphery of vacuum glass is not deformed, does not produce excessive stress, does not leak air, and maintains the characteristics of tempered glass. In the patent CN94192667.2 "Method for Manufacturing Vacuum Glass Windows", the edge sealing structure is designed so that the upper glass is slightly smaller than ...

AI Technical Summary

Problems solved by technology

In the patent CN94192667.2 "Method for Manufacturing Vacuum Glass Windows", the edge sealing structure is designed so that the upper glass is slightly smaller than the lower glass in the two glasses, and the low melting point glass solder is placed on the edge steps formed by the two glasses, and the melted glass Solder flows into the gap between two pieces of glass due to capillary phenomenon. This method is the most representative and practical edge sealing technology at present, but it has the disadvantages of large amount of solder, uneven edges and high stress; patent CN95108228.0 "vacuum Flat glass and its manufacturing method" and CN96208977.X "vacuum flat glass", the edge of the glass plate is used to "chamfer" first, and the solder is placed in the chamfering groove. This method has the difficulty of distributing and the low-melting point glass solder is heated. Deficiencies that are easily lost during fusing and sealing; the patent CN02256440.3 "vacuum glass edge sealing structure" is to put auxiliary sealing strips on the upper periphery of the lower flat glass to prevent the loss of solder liquid. Although this method solves the problem of solder liquid's outward loss , but the process is complicated, and the auxiliary sealing strip takes up a large space, and it cannot solve the problem that the solder liquid flows into the glass; the edge sealing method of the vacuum glass proposed in the patent CN200620070302.7 "fully transparent vacuum glass" is to make the edge of the glass together with the glass The disadvantage is that the edge banding is not only expensive to manufacture but also cannot restrict the flow of low-temperature solder to the inside of the glass; patent CN200920314752.X "Edge banding structure of vacuum glass" is based on the glass and the The top glass and / or the base glass between the edge of the glass is made with a geometric filling groove, although it can improve the adhesion of the sealing filler between the base glass and the top glass, but the filling groove of the upper and lower glass is difficult. At the same time, the sealing packing is filled, and the random flow of the sealing packing cannot be restricted; Patent CN201010228110.5 "A Vacuum Glass Edge Sealing Method" is to put glass welding material around the periphery of the vacuum glass original plate, and set a layer inside the glass welding material The inner anti-seepage layer made of powdery or fibrous materials restricts the glass solder liquid from flowing into the vacuum glass. Compared with the existing technology, this method only restricts the glass solder liquid from flowing into the vacuum glass, and fails to overcome other shortcomings

In summary, the main disadvantages of the existing edge sealing methods are: first, the structure and process are complex, not suitable for mechanization, automation and mass production; Not suitable for direct extraction of air from the edge of the glass

[0004] The sealing temperature of the low-temperature glass solder used in the existing vacuum glass edge sealing is generally not less than 400°C. If the glass is heated for a long time at this sealing temperature, the tempered glass will anneal and become ordinary glass. Therefore, the existing production technology is very difficult. Difficult to make tempered vacuum glass

[0005] In the patent application 2012100754353, the applicant of the present invention overcomes the main shortcomings in the existing vacuum glass edge sealing process by setting the edge banding frame at the welding place around the glass, but the disadvantage is that the edge banding frame needs to be sintered at high temperature, and the pressed Edge sealing grooves also require high temperature treatment. For glass that does not need to be tempered, it not only wastes energy but also easily leads to deformation of the glass under high temperature; the etching process of edge sealing grooves is not only not conducive to the physical and mental health of workers, but also not conducive to the environment. protection; in addition, direct use of metal or alloy as solder has poor bonding force with glass

[0006] The edge banding of the existing vacuum glass is generally to weld two pieces of glass together with low-temperature solder in a vacuum edge banding furnace. The disadvantages of conventional heating are long heating time, slow heating rate, slower cooling rate, and High energy consumption, poor heating uniformity, especially when making Low-E vacuum glass in a vacuum state, because there is no convective heat transfer, and the Low-E film seriously restricts radiation heat transfer, so its shortcomings are more prominent

[0007] The existing vacuum glass is generally flat glass, and there are supports in the vacuum layer. The supports not only affect the vision, but also affect the heat insulation and sound insulation performance; in addition, the glass at the support is under great stress, which is easy to cause glass breakage

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