Bar frame sealed vacuum glass and manufacturing method thereof

Abstract

The invention relates to bar frame sealed vacuum glass. The bar frame sealed vacuum glass comprises upper glass and lower glass, wherein the periphery of the upper glass and the periphery of the lower glass are connected together through an edge banding bar frame and two or multiple sealing materials in a sealing manner, each sealing material comprises glass solder, metal solder and an adhesive, a closed vacuum layer is formed between the upper glass and the lower glass, the upper glass and the lower glass are convex glass or flat glass, and the convex surface of the convex glass faces to the outer side. A manufacturing method for the vacuum glass disclosed by the invention is simple in process, the manufactured vacuum glass and tempered vacuum glass can overcome the shortages in the prior art, the air tightness and service life of the vacuum glass can be effectively guaranteed, and mechanized, automated and large-scale production can be achieved.

Description

technical field [0001] The invention relates to the technical field of glass deep processing, in particular to a vacuum glass and a manufacturing method thereof. Background technique [0002] Existing vacuum glass is generally composed of two pieces of flat glass. The glass is sealed with low-temperature glass solder around the glass, and there is a tiny support in the middle. A thin vacuum layer with a thickness of 0.1-0.2mm is formed between the two pieces of glass by vacuuming. Since there is no heat transfer and sound transfer of gas, and the inner surface of the glass can have a transparent low-emissivity film, the vacuum glass has good heat insulation and sound insulation effects, and is one of the best performance energy-saving glasses; because the vacuum layer is very Thin, so it has advantages compared with other energy-saving glass in terms of weight and thickness. [0003] After decades of research and development, there are a variety of vacuum glass production...

AI Technical Summary

Problems solved by technology

The two-step process is a relatively mature technology. The existing commercially available vacuum glass is produced by the two-step process, that is, the production process of sealing the edge with low-temperature glass solder, then evacuating through the suction port, and finally sealing the suction port; but Due to the complex structure of the produced vacuum glass, cumbersome process, high cost, low production capacity, and the inability to produce fully tempered vacuum glass, the production and application of vacuum glass have been greatly restricted; Without the high-temperature exhaust process, the airtightness of the organic adhesive is poor, making it difficult to maintain the vacuum, so it is identified as a pseudo-vacuum glass

The one-step production process of directly sealing the edge in the vacuum furnace is the main means of low-cost and mass-produced vacuum glass. The current technology is to use glass solder or metal solder to seal the edge; the existing problem is: when using glass solder to seal the edge , due to the high welding temperature, it is not easy to produce fully tempered vacuum glass. The bigger problem is that the glass solder is prone to outgassing when it is melted in a vacuum, which not only causes many bubbles in the glass solder itself, but also changes the properties of the glass solder, thus It affects the bonding strength and air tightness, and it is difficult to produce long-life, high-quality vacuum glass; when using metal solder for edge sealing, because the molten metal solder will volatilize under vacuum, the volatilized metal gas molecules will be deposited on the glass On the surface, or react with the residual air in the vacuum to form compounds and then deposit on the glass surface, similar to vacuum coating, not only affects the appearance of the vacuum glass, but also affects the light transmission of the vacuum glass, so it is impossible to obtain a satisfactory vacuum glass Therefore, although metal solder can reduce the sealing temperature and thus can produce tempered vacuum glass, flexible edge sealing can effectively reduce stress and reduce damage rate, lead-free sealing can eliminate heavy metal pollution, etc., but so far there is no vacuum glass with metal edge sealing

In summary, the three materials of glass solder, metal solder and organic adhesive cannot be directly applied to seal vacuum glass under vacuum.

In addition, in order to reduce the heat transfer and sound transmission of the support and the impact on visibility, the smaller the size of the support, the better. The smaller the size of the support, the greater the pressure on the support and the glass in contact. , the more likely the support and the glass are broken, the worse the impact resistance of the vacuum glass

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