Vacuum glass with edge sealing structure

Abstract

The utility model provides vacuum glass with an edge sealing structure. The vacuum glass comprises at least two glass sheets, a support and an edge sealing structure, the edge sealing structure is arranged at the peripheral edge position between the two glass sheets, the two glass sheets and the edge sealing structure jointly define a vacuum layer, the supporting object is arranged in the vacuum layer, the edge of each glass sheet is provided with a roughened sealing surface, the roughened sealing surface is provided with an ultrasonic metal layer, and the ultrasonic metal layer is arranged on the edge sealing surface. A sealing metal layer is arranged between the two ultrasonic metal layers on the two glass sheets, and the roughened sealing surface, the ultrasonic metal layers and the sealing metal layer jointly form an edge sealing structure. The utility model can provide the large-size and / or curved-surface vacuum glass with the edge sealing structure, and has the advantages of low production cost, energy conservation, environmental protection and the like.

Description

Technical Field

[0001] The utility model relates to a vacuum glass with an edge sealing structure, belonging to the technical field of vacuum glass. Background Art

[0002] People are paying more and more attention to energy conservation, emission reduction and green environmental protection in life and production. In order to live and work more comfortably, people have become more and more dependent on air conditioning, and glass is an important place where air conditioning loses energy in the process of regulating temperature, whether the glass is in the field of construction or transportation. Therefore, reducing the energy exchange of glass as much as possible can reduce the power consumption of air conditioning, which is more conducive to energy conservation and emission reduction. At present, the glass on the market is mainly flat glass, and there is still a lack of one-piece processing and molding technology in terms of thickness. Glass sealing technology is required to realize the processing and assembly of glass in the thickness direction. Among them, the most typical is vacuum glass, which is a very good energy-saving and sound-insulating material, and is very environmentally friendly. Vacuum glass is a new type of glass product and also a deep-processed glass product. Vacuum glass refers to a glass product in which two or more pieces of glass are separated by supports, sealed around the periphery, and a vacuum layer is formed between the glass. Since vacuum glass needs to build a vacuum layer in the middle of the glass, vacuum glass has very high requirements for edge sealing technology. Because vacuum glass requires the vacuum degree in its cavity to be less than 10 -1 Pa, as long as the edge sealing technology is not good, there will be a little leakage, which will allow external gas to gradually enter the vacuum chamber; once the vacuum degree of the vacuum glass rises and eventually restores 1 atmosphere of pressure, the product will lose the advantages of vacuum glass and become the same as ordinary glass products. Therefore, the edge sealing technology of vacuum glass is very important and critical.

[0003] The mainstream vacuum glass edge sealing processes on the market currently include: ① glass powder high-temperature edge sealing ② multi-layer metal edge sealing ③ laser edge sealing.

[0004] The edge sealing process of vacuum glass using glass powder high temperature edge sealing has obvious disadvantages: the material of glass powder edge sealing has specific requirements, and the difference between its expansion coefficient and the expansion coefficient of vacuum glass must be less than 5%, and the edge sealing temperature is close to 700℃. Glass powder is not easy to fix the shape on flat glass, which makes it difficult to standardize the edge sealing width. Moreover, it is important to note that glass powder edge sealing cannot be used for large-sized curved glass; therefore, this high-temperature glass powder edge sealing technology is limited to flat glass under large equipment.

[0005] Multi-layer metal edge sealing is another technology for vacuum glass edge sealing. It uses multi-layer metal to bond with glass and uses the density of metal to seal the edge of glass. Although this process method gets rid of the problem that glass powder edge sealing cannot process edge sealing areas of fixed size and width, and can barely prepare curved glass, this edge sealing method has great defects. Multiple metals greatly increase the production cost in terms of materials, and the bonding of multi-layer metals complicates the process flow.

[0006] Laser edge sealing is another technology for vacuum glass edge sealing. The edge sealing method is to stick two pieces of glass and glass powder together, and use a special laser (commonly used thermal laser) to make the glass edge form a whole. Laser edge sealing technology avoids the disadvantages of using different materials for the edges and avoids different thermal expansion coefficients, but its main disadvantage is that it cannot efficiently process large-area glass plates, which is also limited by the flatness of large glass plates. The size of vacuum glass is much larger than that of the optoelectronic field, which will also limit the laser edge sealing technology, directly leading to welding failure or reduced strength.

[0007] In view of the above-mentioned defects, it is necessary to develop a new type of vacuum glass with an edge sealing structure. Utility Model Content

[0008] In order to solve the above technical problems, the purpose of the utility model is to provide a vacuum glass with an edge sealing structure. The utility model can provide a large-sized and / or curved vacuum glass with an edge sealing structure, and has the advantages of low production cost, energy saving and environmental protection.

[0009] In order to achieve the above-mentioned purpose, the utility model provides a vacuum glass with an edge sealing structure, which includes: at least two glass sheets, a support and an edge sealing structure; the edge sealing structure is arranged at the edge positions around the two glass sheets, the two glass sheets and the edge sealing structure together form a vacuum layer, and the support is arranged in the vacuum layer; wherein the edge of the glass sheet has a roughened sealing surface, an ultrasonic metal layer is arranged on the roughened sealing surface, a sealing metal layer is arranged between the two ultrasonic metal layers on the two glass sheets, and the roughened sealing surface, the ultrasonic metal layer and the sealing metal layer together constitute the edge sealing structure.

[0010] In the above vacuum glass with edge sealing structure, preferably, the roughness of the roughened sealing surface is 0.1-8 μm. More preferably, the roughness of the roughened sealing surface is 0.5-8 μm.

[0011] In the above-mentioned vacuum glass with an edge sealing structure, preferably, the ultrasonic metal layer is a layer formed by combining a low-melting-point metal with the roughened sealing surface.

[0012] In the above-mentioned vacuum glass with an edge sealing structure, preferably, the low melting point metal includes tin alloy, indium tin alloy, indium tin lead alloy, or indium tin silver gallium alloy.

[0013] In the above-mentioned vacuum glass with an edge sealing structure, preferably, the ultrasonic metal layer is a layer formed by ultrasonic welding to the roughened sealing surface.

[0014] In the above-mentioned vacuum glass with edge sealing structure, preferably, the thickness of the ultrasonic metal layer is 10-500 μm.

[0015] In the above vacuum glass with edge sealing structure, preferably, the metal of the sealing metal layer is a metal compatible with the metal of the ultrasonic metal layer. More preferably, the metal of the sealing metal layer is the same metal as the metal of the ultrasonic metal layer.

[0016] In the above-mentioned vacuum glass with edge sealing structure, preferably, the metal of the sealing metal layer includes tin alloy, indium tin alloy, indium tin lead alloy, indium tin silver gallium alloy or the like.

[0017] In the above-mentioned vacuum glass with edge sealing structure, preferably, the support comprises metal or non-metal. More preferably, the support comprises stainless steel or ceramic.

[0018] In the above-mentioned vacuum glass with an edge sealing structure, preferably, the shape of the support includes a columnar shape or a linear shape.

[0019] In the above-mentioned vacuum glass with an edge sealing structure, preferably, the supports are arranged in the vacuum layer in an array manner.

[0020] In the above-mentioned vacuum glass with an edge sealing structure, preferably, the glass sheet comprises a flat glass sheet or a curved glass sheet.

[0021] In the above-mentioned vacuum glass with an edge sealing structure, preferably, the glass sheet includes an ordinary glass sheet, a semi-tempered glass sheet, a tempered glass sheet, or the like.

[0022] According to a specific embodiment of the present invention, preferably, the vacuum glass with an edge sealing structure further comprises: a protective layer, wherein the protective layer is at least arranged on the surface of the sealing metal layer exposed to the outside.

[0023] In the above-mentioned vacuum glass with an edge sealing structure, preferably, the material of the protective layer includes glue.

[0024] According to a specific implementation of the utility model, preferably, the vacuum glass with the edge sealing structure is a large-sized and / or curved vacuum glass.

[0025] Compared with the prior art, the vacuum glass with edge sealing structure of the utility model has at least the following beneficial effects: the vacuum glass of the utility model adopts simple materials and simple preparation equipment, has low dependence on equipment and materials, has low energy consumption, fast production speed, can save time, has strong operability, and therefore has the advantages of energy saving, environmental protection, and low production cost. In addition, the utility model overcomes the technical difficulty of the prior art that it is difficult to seal the edges of large-sized and / or curved glass, and can provide large-sized and / or curved vacuum glass with edge sealing structure, which has broad application prospects. At the same time, the strength of the edge sealing structure of the vacuum glass of the utility model is sufficient to resist atmospheric pressure and has high strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic structural diagram of a vacuum glass with an edge sealing structure provided for a specific embodiment of the utility model.

[0027] Figure 2 It is a schematic structural diagram of a glass sample for testing in a method for testing the glass-metal bonding strength in a specific embodiment of the utility model.

[0028] Figure 3 This is a schematic diagram of the structure of the vacuum glass with edge sealing structure provided in Example 1.

[0029] Figure 4 This is a schematic structural diagram of the vacuum glass with edge sealing structure provided in Example 2.

[0030] Description of Figure Numbers:

[0031] 1-glass sheet; 2-support; 3-edge sealing structure; 4-vacuum layer; 5-protective layer;

[0032] 101-a first glass sheet; 102-a second glass sheet;

[0033] 301 - roughened sealing surface; 302 - ultrasonic metal layer; 303 - sealing metal layer. DETAILED DESCRIPTION

[0034] In order to have a clearer understanding of the technical features, purposes and beneficial effects of the utility model, the technical solution of the utility model is now described in detail below, but it should not be understood as limiting the applicable scope of the utility model.

[0035] The utility model provides a vacuum glass with an edge sealing structure, such as Figure 1As shown, it includes: at least two glass sheets 1, a support 2 and an edge sealing structure 3; the edge sealing structure 3 is arranged at the edge positions around the two glass sheets 1, the two glass sheets 1 and the edge sealing structure 3 together form a vacuum layer 4, and the support 2 is arranged in the vacuum layer 4; wherein, the edge of the glass sheet 1 has a roughened sealing surface 301, an ultrasonic metal layer 302 is arranged on the roughened sealing surface 301, a sealing metal layer 303 is arranged between the two ultrasonic metal layers 302 on the two glass sheets 1, and the roughened sealing surface 301, the ultrasonic metal layer 302 and the sealing metal layer 303 together constitute the edge sealing structure 3.

[0036] Those skilled in the art can understand that the sizes and positions of the roughened sealing surfaces 301 and the ultrasonic metal layers 302 of the two glass sheets 1 are consistent.

[0037] In some embodiments, there is or there is no overlap between the two glass sheets 1 .

[0038] In some embodiments, the roughness of the roughened sealing surface 301 is 0.1-8 μm, preferably 0.5-8 μm. The present invention designs a roughened sealing surface 301 with a certain roughness, which is 2-3 orders of magnitude higher than the original surface roughness of the glass sheet 1. The width of the roughened sealing surface 301 can be conventionally adjusted by a person skilled in the art.

[0039] In some embodiments, the roughened sealing surface 301 is formed by roughening the edge of the glass sheet 1. The roughening technology used may include physical roughening technology and / or chemical roughening technology. Common physical roughening technologies include mechanical grinding, sandblasting, laser grinding, etc.; mechanical grinding mainly uses the relative motion friction of objects to cause surface roughening, such as using mechanical grinding heads, angle grinders, coarse sand belts, etc.; sandblasting uses high-speed moving gravel to impact the surface to cause roughening; lasers use lasers based on optical principles to create the desired roughness on the surface. Chemical roughening technology uses chemical reactions to roughen the surface, usually including corrosion or abrasive grinding. These physical or chemical roughening technologies can all use existing technologies.

[0040] In some embodiments, the distance between the roughened sealing surface 301 and the edge of the glass sheet 1 is 0-5 mm.

[0041] In some embodiments, the width of the roughened sealing surface 301 is 10-15 mm.

[0042] In some embodiments, the ultrasonic metal layer 302 is a layer formed by combining a low melting point metal with the roughened sealing surface 301 .

[0043] In some embodiments, the ultrasonic metal layer 302 is a layer formed by ultrasonic welding to the roughened sealing surface 301 .

[0044] Specifically, the ultrasonic metal layer 302 is a layer formed by using an ultrasonic welding device to bond a low melting point metal to the roughened sealing surface 301. Preferably, the ultrasonic frequency of the ultrasonic welding device is 20-80 kHz and the temperature is 120-240°C.

[0045] The utility model uses ultrasonic welding equipment to form a dense metal layer of low-melting-point metal on the roughened sealing surface 301, namely, the ultrasonic metal layer 302, which can be effectively combined with the roughened sealing surface 301 of the glass sheet 1 and will not fall off easily. Specifically, the ultrasonic welding equipment is used to combine ultrasonic waves and liquid low-melting-point metal, so that the liquid metal is in a vibrating state. After contacting the roughened sealing surface 301 of the glass sheet 1, the metal cools down and effectively combines with the concave-convex structure on the roughened sealing surface 301.

[0046] The present invention adopts the design of roughened sealing surface 301 and the use of ultrasonic welding equipment to improve the bonding strength between ultrasonic metal layer 302 and glass sheet 1. For example, after using a glass sheet with an original surface roughness of 0.01 μm and forming a metal layer through ultrasonic welding equipment, it is found that the bonding strength between glass and metal is 1 Mpa. After using a glass sheet 1 with a roughened sealing surface 301 and forming an ultrasonic metal layer 302 through ultrasonic welding equipment, it is found that the bonding strength between glass and metal is 4-6 Mpa. It can be seen that the bonding strength is improved by 4-6 times, and the improvement effect is obvious.

[0047] Among them, the test method of the glass-metal bonding strength is carried out in accordance with the method described in GB / T37781-2019 (four-point bending), and a universal testing machine is used to perform the bonding test and calculate the strength. The specific test steps and calculation methods include: (1) preparing a first glass sheet 101 having a roughened sealing surface 301 and a second glass sheet 102 having a roughened sealing surface 301. For the convenience of testing, the roughened sealing surface 301 can be respectively arranged in the middle of the surface of the first glass sheet 101 and the second glass sheet 102; using ultrasonic welding equipment to bond a low-melting-point metal to the two roughened sealing surfaces 301 of the first glass sheet 101 and the second glass sheet 102 to form an ultrasonic metal layer 302, and obtain a glass sample for testing, the structure of which is as follows: Figure 2As shown, the area of ​​the ultrasonic metal layer 302 is the effective area S; (2) the first glass sheet 101 is placed on the test fixture, and a universal testing machine is used to measure and load stress F on the second glass sheet 102, and the loading direction of the stress F is opposite to the position direction of the first glass sheet 101 (that is, the first glass sheet 101 and the second glass sheet 102 are subjected to a tensile force) until the ultrasonic metal layer 302 is separated from the first glass sheet 101 or the second glass sheet 102, and the test is completed; (3) the glass-metal bonding strength f is calculated using the following formula: f = F / S, where f is the glass-metal bonding strength (in MPa), F is the stress loaded when the ultrasonic metal layer 302 is separated from the first glass sheet 101 or the second glass sheet 102 (in N), and S is the effective area (in mm 2 ).

[0048] In some embodiments, the low melting point metal includes tin alloy, indium tin alloy, indium tin lead alloy, indium tin silver gallium alloy, or the like.

[0049] In some embodiments, the distance between the ultrasonic metal layer 302 and the edge of the glass sheet 1 is 0-20 mm.

[0050] In some embodiments, the width of the ultrasonic metal layer 302 is 2-10 mm.

[0051] In some embodiments, the thickness of the ultrasonic metal layer 302 is 10-500 μm.

[0052] In some embodiments, the metal of the sealing metal layer 303 is a metal compatible with the metal of the ultrasonic metal layer 302 , and the difference in melting points between the two metals is usually less than 200° C. The sealing metal layer 303 is preferably the same metal as the metal of the ultrasonic metal layer 302 .

[0053] In some embodiments, the metal of the sealing metal layer 303 includes tin alloy, indium tin alloy, indium tin lead alloy, indium tin silver gallium alloy, or the like.

[0054] In some embodiments, the shape of the metal of the sealing metal layer 303 includes a strip or a belt, etc., which can be adjusted accordingly according to the shape of the glass sheet 1 .

[0055] In some embodiments, the support 2 comprises metal or non-metal. Preferably, the support 2 comprises stainless steel or ceramic.

[0056] In some embodiments, the shape of the support 2 includes a columnar shape or a linear shape, etc. Among them, the columnar shape can be a shape similar to a drum-shaped cylinder.

[0057] In some embodiments, the height of the support 2 is the height of the vacuum layer 4 designed between the two glass sheets 1, which is generally 0.1-0.5 mm.

[0058] In some embodiments, the supports 2 are arranged in an array in the vacuum layer 4 .

[0059] In some embodiments, the vacuum glass with edge sealing structure can be assembled by the following method: arrange the metal of sealing metal layer 303 between two layers of ultrasonic metal layer 302 on two glass sheets 1, arrange the support 2 on the inner side of the metal of sealing metal layer 303; fix the two glass sheets 1 by clamping device, apply pressure on the edge sealing structure 3, the pressure range is generally 1-100kPa, and obtain an assembly; heat the assembly, keep it warm for 20-50min under appropriate pressure, and then slowly cool it down, in this process, the metal of sealing metal layer 303 and the metal of ultrasonic metal layer 302 form mutually soluble metal, and form a whole after cooling, so as to obtain the vacuum glass with edge sealing structure. Wherein, the heating method includes but is not limited to resistance heating, magnetic induction heating, heat conduction heating, etc. The heating temperature needs to be higher than the melting point of the metal of the sealing metal layer 303 and the metal of the ultrasonic metal layer 302. For example, if the metal of the sealing metal layer 303 and the metal of the ultrasonic metal layer 302 are both indium tin alloy, the heating temperature can be set at 130-350°C. In this temperature range, the indium tin alloy melts.

[0060] In some embodiments, the glass sheet 1 includes a flat glass sheet or a curved glass sheet.

[0061] In some embodiments, the glass sheet 1 includes a common glass sheet, a semi-tempered glass sheet, a tempered glass sheet, or the like.

[0062] In some embodiments, the vacuum glass with edge sealing structure further comprises: a protective layer 5, which is at least arranged on the exposed surface of the sealing metal layer 303. The material of the protective layer 5 preferably comprises glue, such as conventional organic glue and / or inorganic glue. By arranging the protective layer 5, the utility model can prevent the exposed surface of the sealing metal layer 303 from being corroded and oxidized by water vapor or oxygen in the environment during use of the vacuum glass.

[0063] In some embodiments, the vacuum glass with the edge sealing structure is a large-sized and / or curved vacuum glass.

[0064] The vacuum glass with an edge sealing structure of the present invention is described below with specific embodiments, but the present invention is not limited to the following embodiments, and can of course be implemented in various ways within the scope of the main points of the present invention.

[0065] Example 1

[0066] This embodiment provides a vacuum glass with an edge sealing structure, such as Figure 3As shown, it includes: two glass sheets 1, a support 2 and an edge sealing structure 3; the edge sealing structure 3 is arranged at the edge positions around the two glass sheets 1, the two glass sheets 1 and the edge sealing structure 3 together form a vacuum layer 4, and the support 2 is arranged in the vacuum layer 4; wherein, the edges around the two glass sheets 1 have a roughened sealing surface 301, an ultrasonic metal layer 302 is arranged on the roughened sealing surface 301, a sealing metal layer 303 is arranged between the two ultrasonic metal layers 302 on the two glass sheets 1, and the roughened sealing surface 301, the ultrasonic metal layer 302 and the sealing metal layer 303 together constitute the edge sealing structure 3.

[0067] The two glass sheets 1 are both physically tempered flat glass sheets. The sizes of the two glass sheets 1 are 510×360 mm and 500×350 mm respectively, and there is an overlap between the two glass sheets 1. The roughness of the roughened sealing surface 301 is 1-2 μm. Figure 3 As shown, the width of the roughened sealing surface 301 of the upper glass sheet 1 is 10 mm, and the width of the roughened sealing surface 301 of the lower glass sheet 1 is 15 mm. The ultrasonic metal layer 302 is a layer formed by bonding a low-melting-point metal to the roughened sealing surface 301 using an ultrasonic welding device. The low-melting-point metal is an indium-tin alloy. The distance between the ultrasonic metal layer 302 and the edge of the upper glass sheet 1 is 0, and the distance between the ultrasonic metal layer 302 and the edge of the lower glass sheet is 5 mm. The width of the ultrasonic metal layer 302 is 10 mm and the thickness is 10-500 μm. The metal of the sealing metal layer 303 is an indium-tin alloy, and its shape is a strip with a width of 3-6 mm and a height of 1-3 mm. The support 2 is a stainless steel column in the shape of a drum-shaped cylinder or a stainless steel coil with a diameter of 0.3 mm. The height of the support 2 is 0.1-0.5 mm. The support 2 can be arranged in the vacuum layer 4 in an array manner. The vacuum glass with edge sealing structure further comprises: a protective layer 5, which is at least arranged on the exposed surface of the sealing metal layer 303. The material of the protective layer 5 is organic sealing glue.

[0068] The original surface roughness of the glass sheet 1 used in this embodiment is 0.01 μm. For comparison, after the indium tin alloy is used to form a metal layer on the surface of the original glass sheet 1 by ultrasonic welding equipment, it is found that the glass-metal bonding strength is 1 MPa. When the glass sheet 1 with a roughened sealing surface 301 (roughness of 1-2 μm) is used in this embodiment and the ultrasonic metal layer 302 is formed by ultrasonic welding equipment, it is found that the glass-metal bonding strength is 4-6 MPa.

[0069] The test method for the glass-metal bonding strength is carried out in accordance with the method described in GB / T37781-2019 (four-point bending), using a universal testing machine to test the bonding strength and calculate the strength. The specific test steps and calculation methods are as described above.

[0070] It can be seen that, when the material of the ultrasonic metal layer 302, the ultrasonic frequency and temperature of the ultrasonic welding equipment, and the thickness and area of ​​the ultrasonic metal layer 302 are the same, the present embodiment adopts the design of the roughened sealing surface 301 and the use of the ultrasonic welding equipment, which increases the bonding strength between the ultrasonic metal layer 302 and the glass sheet 1 by 4-6 times, and the improvement effect is obvious.

[0071] The vacuum glass with edge sealing structure of this embodiment is prepared by the following method:

[0072] First, the edges of the two glass sheets 1 are roughened by physical mechanical grinding, using a grinding belt or a sandblasting machine, with a grinding width of 10 mm and 15 mm, respectively, and a surface roughness of 1-2 μm. The grinding areas of the two glass sheets 1 are aligned to obtain a roughened sealing surface 301;

[0073] Secondly, ultrasonic metallization is performed on the two glass sheets 1 with roughened sealing surfaces 301 respectively. The equipment used is an ultrasonic spot welder. The material used is an indium tin alloy. Ultrasonic metallization is performed on the roughened sealing surface 301. The process conditions include: the ultrasonic frequency of the ultrasonic spot welder can be used in the range of 20-80kHz, the temperature range is 120-240°C, preferably the frequency is 30-40kHz, and the temperature is 180-200°C. An ultrasonic metal layer 302 is formed, and the distance between the ultrasonic metal layer 302 and the edge of the upper glass sheet 1 is 0, and the distance between the ultrasonic metal layer 302 and the edge of the lower glass sheet is 5mm. The ultrasonic metal layer 302 has a width of 10mm and a thickness of 10-500μm.

[0074] Next, one or more circles of metal of the sealing metal layer 303 are arranged between the two ultrasonic metal layers 302 on the two glass sheets 1. The material used is an indium tin alloy, and the shape is a strip with a width of 3-6 mm and a height of 1-3 mm. A support 2 is arranged on the inner side of the metal of the sealing metal 303 layer. The material used is a stainless steel column or a stainless steel coil, and the height is 0.1-0.5 mm.

[0075] Afterwards, the two glass sheets 1 are fixed by a clamping device, and pressure is applied above the edge sealing structure 3, the pressure range is generally 1-100 kPa, preferably 50 kPa, to obtain an assembly; the assembly is heated, and heat conduction heating is selected, and an oven or a furnace is used for heating. The heating temperature needs to be higher than the melting point of the metal of the sealing metal layer 303 and the metal of the ultrasonic metal layer 302. In this embodiment, indium tin alloy is used, and the heating temperature is set in the range of 130-350°C, preferably 180±10°C, and the heat preservation time is 30±10 minutes under appropriate pressure, and then the temperature is slowly reduced and cooled;

[0076] Finally, after the airtightness test is passed, an organic sealing glue is coated on at least the exposed surface of the sealing metal layer 303 to form a protective layer 5 .

[0077] Example 2

[0078] This embodiment provides a vacuum glass with an edge sealing structure, which is basically the same as Embodiment 1, except that: both glass sheets 1 are physically tempered curved glass sheets.

[0079] like Figure 4 As shown ( Figure 4 Only a part of the structure of the vacuum glass with edge sealing structure is shown, the sizes of the two glass sheets 1 are 860×550mm and 850×540mm respectively, and there is an overlap between the two glass sheets 1. The roughness of the roughened sealing surface 301 is 3-4μm. The width of the roughened sealing surface 301 is 10mm. The distance between the roughened sealing surface 301 and the edge of the upper glass sheet 1 is 0, and the distance between the roughened sealing surface 301 and the edge of the lower glass sheet 1 is 5mm. The ultrasonic metal layer 302 is a layer formed by bonding a low-melting-point metal to the roughened sealing surface 301 using ultrasonic welding equipment. The low-melting-point metal is an indium tin alloy. The distance between the ultrasonic metal layer 302 and the edge of the upper glass sheet 1 is 0, and the distance between the ultrasonic metal layer 302 and the edge of the lower glass sheet 1 is 5mm. The width of the ultrasonic metal layer 302 is 10mm and the thickness is 100-500μm. The metal of the sealing metal layer 303 is an indium tin alloy, and its shape is a strip, with a width of 3-6 mm and a height of 1-3 mm. The support 2 is a stainless steel column in the shape of a drum cylinder or a stainless steel coil with a diameter of 0.3 mm. The height of the support 2 is 0.3-0.5 mm. The support 2 can be arranged in the vacuum layer 4 in an array. The vacuum glass with an edge sealing structure further includes: a protective layer 5, which is at least arranged on the surface of the sealing metal layer 303 exposed to the outside. The material of the protective layer 5 is organic sealing glue.

[0080] The original surface roughness of the glass sheet 1 used in this embodiment is 0.01μm. For comparison, after the indium tin alloy is used to form a metal layer on the surface of the original glass sheet 1 through ultrasonic welding equipment, it is found that the glass-metal bonding strength is 1Mpa. However, after the glass sheet 1 with a roughened sealing surface 301 (roughness of 3-4μm) of this embodiment is used and the ultrasonic metal layer 302 is formed through ultrasonic welding equipment, it is found that the glass-metal bonding strength is 4-6Mpa. It can be seen that when the material of the ultrasonic metal layer 302, the ultrasonic frequency and temperature of the ultrasonic welding equipment, and the thickness and area of ​​the ultrasonic metal layer 302 are the same, the roughened sealing surface 301 design and the use of ultrasonic welding equipment in this embodiment increase the bonding strength between the ultrasonic metal layer 302 and the glass sheet 1 by 4-6 times, and the improvement effect is obvious.

[0081] The vacuum glass with edge sealing structure of this embodiment is prepared by the following method:

[0082] First, the edges of the two glass sheets 1 are roughened by physical mechanical grinding, using a grinding belt or a sandblasting machine, with a grinding width of 10 mm and a surface roughness of 3-4 μm. The grinding area of ​​the upper glass sheet 1 starts along the edge of the glass sheet 1, and the grinding area of ​​the lower glass sheet 1 is 5 mm away from the edge of the glass sheet 1, to obtain a roughened sealing surface 301.

[0083] Secondly, ultrasonic metallization is performed on two glass sheets 1 with roughened sealing surfaces 301 respectively. The equipment used is an ultrasonic spot welder. The material used is an indium tin alloy. Ultrasonic metallization is performed on the roughened sealing surface 301. The process conditions include: the ultrasonic frequency of the ultrasonic spot welder can be used in the range of 20-80kHz, the temperature range is 120-240°C, preferably the frequency is 30-40kHz, and the temperature is 180-200°C. An ultrasonic metal layer 302 is formed, and the distance between the ultrasonic metal layer 302 and the edge of the upper glass sheet 1 is 0, and the distance between the ultrasonic metal layer 302 and the edge of the lower glass sheet 1 is 5mm. The ultrasonic metal layer 302 has a width of 10mm and a thickness of 100-500μm.

[0084] Next, one or more circles of metal of the sealing metal layer 303 are arranged between the two ultrasonic metal layers 302 on the two glass sheets 1. The material used is an indium tin alloy, and the shape is a strip with a width of 3-6 mm and a height of 1-3 mm. A support 2 is arranged on the inner side of the metal of the sealing metal layer 303. The material used is a stainless steel column or a stainless steel coil, and the height is 0.3-0.5 mm.

[0085] Afterwards, the two glass sheets 1 are fixed by a clamping device, and pressure is applied above the edge sealing structure 3, the pressure range is generally 1-100 kPa, preferably 30 kPa, to obtain an assembly; the assembly is heated, and heat conduction heating is selected, and an oven or a furnace is used for heating. The heating temperature needs to be higher than the melting point of the metal of the sealing metal layer 303 and the metal of the ultrasonic metal layer 302. In this embodiment, indium tin alloy is used, and the heating temperature is set in the range of 130-350°C, preferably 180±10°C, and the heat preservation time is 30±10 minutes under appropriate pressure, and then the temperature is slowly reduced and cooled;

[0086] Finally, after the airtightness test is passed, an organic sealing glue is coated on at least the exposed surface of the sealing metal layer 303 to form a protective layer 5 .

[0087] In summary, the materials used in the vacuum glass of the utility model are simple, and there is no need to use a variety of metal materials; the preparation equipment is simple, and there is no need to use expensive equipment; the dependence on equipment and materials is low, the energy consumption is low, the production speed is fast, it can save time, and it is highly operable, so it has the advantages of energy saving, environmental protection, and low production cost. In addition, the utility model overcomes the technical difficulties of the prior art that it is difficult to seal the edges of large-sized and / or curved glass, and can provide large-sized and / or curved vacuum glass with an edge sealing structure, which has broad application prospects. At the same time, the strength of the edge sealing structure of the vacuum glass of the utility model is about 5Mpa, which is enough to withstand atmospheric pressure and has high strength.

Claims

1. A vacuum glass with an edge sealing structure, comprising: At least two glass sheets, supports, and edge sealing structures; The edge sealing structure is arranged at the edge positions around the two glass sheets, the two glass sheets and the edge sealing structure together form a vacuum layer, the support is arranged in the vacuum layer, and is characterized in that the edge of the glass sheet has a roughened sealing surface, an ultrasonic metal layer is arranged on the roughened sealing surface, a sealing metal layer is arranged between the two ultrasonic metal layers on the two glass sheets, and the roughened sealing surface, the ultrasonic metal layer and the sealing metal layer together constitute the edge sealing structure.

2. The vacuum glass with edge sealing structure according to claim 1, characterized in that: The roughness of the roughened sealing surface is 0.1-8 μm.

3. The vacuum glass with edge sealing structure according to claim 1, characterized in that: The ultrasonic metal layer is a layer formed by bonding a low melting point metal to the roughened sealing surface.

4. The vacuum glass with edge sealing structure according to claim 3, characterized in that: The low melting point metal includes tin alloy, indium tin alloy, indium tin lead alloy, or indium tin silver gallium alloy.

5. The vacuum glass with edge sealing structure according to claim 1, characterized in that: The ultrasonic metal layer is a layer formed by ultrasonic welding to the roughened sealing surface.

6. The vacuum glass with edge sealing structure according to claim 1, characterized in that: The thickness of the ultrasonic metal layer is 10-500 μm.

7. The vacuum glass with edge sealing structure according to claim 1, characterized in that: The metal of the sealing metal layer is a metal compatible with the metal of the ultrasonic metal layer.

8. The vacuum glass with edge sealing structure according to claim 1, characterized in that: The metal of the sealing metal layer includes tin alloy, indium tin alloy, indium tin lead alloy, or indium tin silver gallium alloy.

9. The vacuum glass with edge sealing structure according to claim 1, characterized in that: The glass sheet includes a flat glass sheet or a curved glass sheet.

10. The vacuum glass with edge sealing structure according to claim 1, characterized in that: The vacuum glass with edge sealing structure further comprises: a protective layer, wherein the protective layer is at least arranged on the surface of the sealing metal layer exposed to the outside.

11. The vacuum glass with edge sealing structure according to claim 1, characterized in that: The vacuum glass with the edge sealing structure is a large-sized and / or curved vacuum glass.

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