• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    "method for vacuum glass composite sealing". the present invention relates to a composite sealing method for glass plates comprising: preparing a metal paste coating on the surface of each glass plate to be composed in the predefined sealing area; sintering the metal paste coating within the metallized layer connected with the glass plate; welding the metallized layers in the corresponding sealing areas of the glass plates by using metal welding technology to execute the air impermeable joint between the two glass plates. vacuum glass and insulated glass are also provided. the method has the advantage of a firm connection in the sealing positions, an air tightness and a favorable resistance to thermal shock. the annealing of the hardened glass is avoided because the welding temperature is low, therefore providing convenience with regard to the processing of vacuum hardened glass, hardened insulated glass and other hardened composite glass products.
    公开号:BR112012012676B1
    申请号:R112012012676
    申请日:2010-11-02
    公开日:2020-01-21
    发明作者:Li Yanbing
    申请人:Luoyang Landglass Tech Co Ltd；
    IPC主号:
    专利说明:

    Descriptive Report of the Invention Patent for COMPOSITE SEALING METHOD FOR VACUUM GLASS, PERFORMING THE WATERPROOF AIMING BETWEEN COMPOSITE GLASS PLATES IN A PRESET POSITION OF THE GLASS PLATE THROUGH THE USE OF A METAL WELDING TECHNOLOGY.
    Technical Field:
    [0001] The present invention relates to a composite sealing method for vacuum glass, and specifically refers to a method for making a watertight joint between glass plates composed with each other in a predefined position using of a metal brazing technology.
    Background of the Technique.
    [0002] In general, the existing methods for sealing composed of glass plates are as follows:
    (1) Use of frits with a low melting point to be melted for sealing, where the sealing temperature is 400 500 ° C or more or less in general, and by means of flame or electric heating, the frits with a low melting point are fused in such a way as to complete the composite seal between the glass plates. The glass with a low melting point used by the process is usually PbO-ZnO sealing glass and this material is not favorable with respect to long-term environmental protection requirements, since lead is harmful to the environment and bodies humans. Meanwhile, the equipment and processes for making vacuum glass are complicated, and the glass plates after the composite seal can also often generate borderline heat stress. For this reason, an additional appropriate annealing treatment is required that greatly lowers production efficiency. Furthermore, if this process
    Petition 870190105573, of 10/18/2019, p. 6/28
    2/12 is adopted for the sealing of tempered glass, the glass may lose its safety properties due to the annealing of the glass.
    (2) Adopt various resin or plastic materials to perform the composite seal between the glass plates. Some patent documents mention that organic glasses such as PC, ABS, LDPE, PVC and the like are used, other materials such as PVB, EVA (EM) and the like are used in laminated glass are also mentioned in some patent documents. The processing methods are as follows: place the above materials between two glass plates to be made into prefabricated parts, and then press the prefabricated parts under appropriate conditions. This process is similar to the processes for making laminated glass, and can comprise the composite seal between the glass plates. However, it is difficult to guarantee the absence of leakage in the joints due to the gas permeability and the moisture permeability of most plastics and resins is much greater than those of glass and most organic materials are only physically connected with the surface of the glass plates; and decreasing the resistance of the seal, formation of condensation and moistening between the layers will be directly caused in the case of gas permeation (including water vapor). In addition, the aging of the organic material will have a direct influence on the sealing effects and on the life of the composite glass plates over time., (3) In order to eliminate the problem of annealing in the sealing process of tempered glass , many patent documents mention a method of heating compartmentalized into sections, that is, locally heating the sealing position by means of microwave, high frequency, infrared radiation, laser or the like to directly merge the edges of two or more
    Petition 870190105573, of 10/18/2019, p. 7/28
    3/12 glass plates together under conditions to maintain a low temperature of the glass plate bodies; and some documents mention a photosensitive curing method that is used to perform the composite seal between the glass plates. However, these methods are still under evaluation and in the laboratory stage, and no mature technology or products have been brought to the market. In addition, the aging of the bonding material remains even if a light-sensitive material is used for the composite seal between the glass plates.
    Contents of the Invention:
    [0003] Aiming at the defects of the preceding technique, the purpose of the invention is to provide a method of sealing composed of vacuum glass between glass plates and a vacuum glass product processed by it.
    [0004] For this purpose, the composite sealing method for the vacuum glass of the invention refers to a method for making an air-sealed joint between the glass plates composed with each other in a predefined position using of a metal brazing technology, which comprises the following steps:
    (a) Preparing respectively a metallized layer fixedly connected with the body of the glass plate on a surface of predefined area of each glass plate to be composed.
    (b) Welding the metallized layers in the corresponding sealing areas of each two composite glass plates using a metal brazing technology, to perform the air impermeable junction between the two glass plates in the sealing area.
    [0005] Also, the metallized layer is prepared using a sintering technology that comprises the steps that follow
    Petition 870190105573, of 10/18/2019, p. 8/28
    4/12 follows:
    (a1) By preparing a coating of metal paste on the predefined surface of the sealing area of the glass plate, said metal paste is a high temperature sintered metal paste.
    (a2) Heating the glass plate for sintering the metal paste coating within the metallized layer connected with the glass plate body.
    [0006] Furthermore, the coating is prepared on the surface of the glass plate in a manner of dip coating, spray coating, screen printing, manual coating or mechanical coating.
    [0007] In addition, the metal material contained in the metal paste has a good brazing performance.
    [0008] In addition, the materials contained in the metal paste are Ag or a Cu-Ag or Ni alloy or a Ni-Ag alloy [0009] Furthermore, after step (a), first perform the hardening temper or semitempering or heat strengthening on the glass plate according to the known technology and then perform step (b).
    [00010] In addition, the sintering temperature of said sintering technology is in the tempera temperature range of the glass plate, and the glass plate is directly subjected to rapid extinction and cooling after being processed through sintering technology. to complete the tempering treatment of the glass plate [00011] In addition, in step (b) place a brazing filler of metal foil between the metallized layers in the corresponding sealing areas of the two glass plates or preplate a filling brazing metal over the fur surface
    Petition 870190105573, of 10/18/2019, p. 9/28
    5/12 minus a metallized layer, and then finish the welding that follows according to the metal brazing technology.
    [00012] In addition, the filler metal sheet materials
    brazing and the brazing filler metal are alloys tin. [00013] In addition addition, technology in brazing in metal is performed under the protection of an inert gas or in a atmosphere of H2 or N2. [00014] In addition addition, technology in brazing in metal is performed in a vacuum environment.[00015] In addition addition, technology in brazing in metal is
    performed by local heating of the sealing area by means of laser heating, flame heating, heating by electric current, induction heating or heating by microwave.
    [00016] In addition, the brazing temperature for metal brazing is less than or equal to 350 ° C.
    [00017] According to another aspect of the present invention, a vacuum glass formed by the composition of two or more glass plates is provided, with each two adjacent glass plates forming a space that is closed through a sealing structure positioned in the periphery of the glass plates is subjected to a vacuum between them. The periphery of the glass plate is sealed using the composite seal method.
    [00018] The invention makes the air impermeable junction between glass plates through the adoption of metal brazing technology, and thus provides an entirely new technological method for the composite seal between glass plates. This method has the advantages of a firm connection in the seal positions, high impermeability to air, good resistance to thermal shock and
    Petition 870190105573, of 10/18/2019, p. 10/28
    6/12, and avoids the annealing of tempered glass due to the low brazing temperature to be used, thereby providing convenience with respect to vacuum tempered glass processing. In addition, the type of metal paste and the brazing method of the composite sealing method of the invention for vacuum glass can be chosen flexibly according to the actual demands, conditions and types of processed products, thus enabling the method of the invention to achieve the characteristics of high application capacity and a wide field of application.
    Brief Description of the Drawings [00019] Figure 1 is a flow chart of the manufacture of vacuum tempered glass according to the method of the invention [00020] Figure 2 is a cross section of a glass structure composed of two layers [00021] A figure 3 is a top view and a partial cross-sectional view of figure 2.
    [00022] Figure 4 is a cross section of a glass structure composed of multiple layers.
    Detailed Description.
    [00023] The cross sections of the manufactured two-layer composite glass structure are shown in figure 2 and in figure 3 according to the composite sealing method of the invention, a cross section of a three-layer composite glass structure is shown in In figure 4, a cross section of a tempered insulated glass structure is shown in figure 5, and the numbers in the drawings represent the following items, respectively: 1 for the upper glass plate, 4 for the metallized layers formed after the sintering treatment. glass plate, 3 for the brazing filler, 5 for the lowest glass plate, 2 for the
    Petition 870190105573, of 10/18/2019, p. 11/28
    7/12 intermediate glass layer, 6 for the intermediate support and 7 for the metal spacer.
    [00024] Figure 1 shows the main technological process for the composite sealing of tempered glass plates using the composite sealing method of the invention and this technological process will be explained below based on the 2-layer composite glass in the figure
    2.
    1) Cut two glass plates based on dimension requirements and complete the formation of the edges of them and removing them by washing will contaminate them with grease, dust and other impurities.
    2) Define previously an annular sealing area on the periphery of one of the two surfaces of the glass plate, and prepare a coating of metal paste on the surface of the previously defined annular sealing area of the glass plate by adopting one of a high temperature sinter silver paste with a sintering temperature of 580 - 820 ° C and a mechanical coating method, in which the predefined sealing areas on the two glass plates are corresponding to each other.
    3) Perform a sintering treatment on the two glass plates using the known sintering technology, that is, heat the two glass plates to sinter the metal paste coatings prepared on the two glass plates within the connected metallized layers 4 with the respective glass plate bodies through sintering, where the sintering temperature is 580 - 820 ° C.
    4) Perform the tempering treatment on the upper and lower glass plates that have undergone the sintering treatment using known tempering technology, that is, rapid extinction and cooling of the two glass plates to temper
    Petition 870190105573, of 10/18/2019, p. 12/28
    8/12 the top and bottom glass layers.
    5) Place a thin strip of tin alloy filler that is the same as the metallized layer 4 in shape and size on the metallized layer 4 on the periphery of the upper surface of the lower glass plate 5 and arrange the intermediate supports 6 on the surface inside the metallized layer 4.
    6) Laminate the upper and lower glass plates, that is, press down the surface on the side of the metallized layer 4 of the upper glass plate 1 and the lower glass plate 5 and ensure that the metallized layers 4 of the upper glass 1 and the lower glass plate 5 are interlaced with each other and that the strip of the brazing filler is fixed between the upper and lower metallized layers 4 after compression.
    7) Heat the metallized layers 4 and the brazing filler strip using a known induction heating device to weld the metallized layers 4 of the upper and lower glass plates, thus completing the seal with respect to the peripheries of the plates top and bottom glass.
    8) Finally, trim and pack the sealed two-layer composite glass.
    [00025] The metal material added to the existing metal paste varies with the purpose of the metal paste. In the invention, it is necessary to sinter metallized layers on the surface of the two glass plates by sintering and welding the metallized layers to perform the composite sealing of the two glass plates. Thus, in order to ensure sufficient bond strength of the two metallized layers and the glass plates as well as reliable welding of the two metallized layers, the
    Petition 870190105573, of 10/18/2019, p. 13/28
    9/12 metal contained in the used metal paste has a good welding ability. In addition to the high temperature sintering silver paste used in the example above, metal pastes capable of meeting these requirements also comprise Ag metal paste, Cu-Ag alloy metal paste, Ni metal paste, Ni and Ag alloy metal paste and the like.
    [00026] Different metal pastes have different temperature requirements with respect to sintering treatment, and for this reason the metal paste can be chosen based on the subsequent procedures, for the simplification of the entire technological process. For example, a metal paste that has a sintering temperature within the tempering temperature range of the glass plates can be chosen when tempered composite glass is manufactured. In this way, the glass plate can be tempered directly through rapid extinguishing and cooling after the sintering process.
    [00027] It is specifically indicated that being completed the tempering treatment of the glass plate by reheating the glass plate to the tempering temperature and then quickly extinguishing and cooling the glass plate after the sintering process is also allowed in the manufacturing process of tempered composite glass. In this way, more metal pastes can be chosen due to the non-requirement regarding the sintering temperature for the metal paste.
    [00028] In a similar way, a metal paste with an appropriate sintering temperature can be chosen for the purpose of making semi-tempered or heat-reinforced composite glass and semi-tempering or heat-reinforcing the glass plate can be completed directly through extinction and cooling after the sintering process through
    Petition 870190105573, of 10/18/2019, p. 14/28
    10/12 reheating and cooling of the glass plate using known technology after the sintering process.
    [00029] In addition to the mechanical coating method in step (2), the preparation methods for dip coating, spray coating, screen printing, manual coating and the like can also be applied to metal paste coating preparations on the glass plate. In addition, in addition to the conventional metal paste, an ink-type metal paste and a cream-type metal paste can also be used if necessary.
    [00030] The intermediate supports 6 are arranged between the two glass plates in the glass composed of two layers of the example above in order to maintain a predefined interval between the two glass plates, and the interval between the two glass plates can be adjusted by adjusting the sizes of the intermediate supports.
    [00031] With the use of a tin alloy filler as the filler for brazing, a lower welding temperature (less than 250 ° C, in general) for the brazing process can be achieved, avoiding by means of hence the influence of the brazing temperature in relation to the performance of the glass plate itself, which is extremely obvious in relation to the tempered composite glass process. Since the glass plate was already in the tempering state before brazing, the brazing temperature must be controlled to be less than or equal to 350 ° C to prevent the tempered glass plate from being annealed in the brazing process . Similarly, with respect to the glass plate that has already been semi-tempered or reinforced with heat before brazing, the brazing temperature is controlled to be less than or equal to 350 ° C to prevent the plate glass be
    Petition 870190105573, of 10/18/2019, p. 15/28
    11/12 annealed in the brazing process.
    [00032] In order to further improve the quality of the brazing, the brazing process can be carried out in an atmosphere of H2 or N2 or an inert gas or in a vacuum environment.
    [00033] The tin alloy filler can also be pre-plated over the metallized layer, instead of being prefabricated within the sheet or thin strip whose shape is the same as that of the metallized layer in the sealing position.
    [00034] In the example above, induction heating is used in the brazing process of the metallized layer, and the heating method can perform local heating, in such a way that the brazing process can be started from a certain point in the entire annular sealing area and gradually carried along the metallized layer until the welding of the metallized layer in the entire annular sealing area is completed. In addition to the induction heating mode, the brazing process can also be performed by means of flame heating, electric current heating, laser heating or microwave heating, or immersion brazing technology is adopted.
    [00035] The sealing area of the glass plate in the example is positioned on the periphery of the glass plate and is formed in a closed ring, and for this reason, the application of vacuum in the space between the two glass plates on the inner side of the glass plate. Sealing area can form vacuum tempered glass. The vacuum between the upper and lower glass plates can be carried out through the provision of bleeding holes in the upper or lower glass plate and applying the vacuum after brazing the metallized layers, and can also be carried out by laminating the top glass plates
    Petition 870190105573, of 10/18/2019, p. 16/28
    12/12 and below and brazing the metallized layers in a vacuum chamber.
    [00036] The above content is the explanation of the two-layer composite glass sealing process as shown in figure 2 and figure 3. In addition, the invention's composite sealing method can also be applied to the sealing of composite glass from three-layer or multi-layer as shown in figure 4. Compared with the two-layer composite glass, the metallized layers are prepared on the peripheries of the surfaces on both sides of the intermediate glass plate with respect to the three-layer or multilayer glass .
    [00037] These drawings offer only a few detailed descriptions of the invention, the description and drawings are not intended to limit the scope of the present invention. Any other modality based on the design principle of the invention is included in the scope of protection of the invention, which is defined in the embodiments.
    权利要求:
    Claims (8)
    [1]
    1. Composite sealing method for vacuum glass, making the air impermeable junction between composite glass plates in a predefined position of the glass plate (1, 5) through the use of metal brazing technology, comprising the steps of :
    a) prepare respectively a metallized layer (4) connected with the glass plate body (1, 5) on the predefined sealing area surface of each glass plate (1, 5) to be composed, the preparation process being:
    a1) preparing a coating of metal paste on the surface of the glass plate (1, 5) in the predefined sealing area, the metal paste comprising a sintering temperature between 580 ° C and 820 ° C;
    characterized by the fact that it still comprises the following steps:
    a2) heating the glass plate (1, 5) for sintering the metal paste coating within the metallized layer (4) connected with the glass plate body (1, 5);
    (b) tempering or semi-tempering or heat-strengthening the glass plate (1, 5);
    (c) weld the metallized layers (4) in the corresponding sealing areas of each two glass plates (1, 5) composed using the metal brazing technology to make the air impermeable junction between the two glass plates ( 1, 5) in the sealing area, where the sintering temperature of the sintering technology in step (a2) is in the tempering range of the glass plate (1, 5), and the glass plate (1, 5) is subjected directly to rapid extinction and cooling after being processed
    Petition 870190105573, of 10/18/2019, p. 18/28
    [2]
    2/3 using sintering technology to complete the tempering treatment of the glass plate (1, 5), with the welding temperature for metal welding being less than or equal to 350 ° C.
    2. Method according to claim 1, characterized by the fact that the coating is prepared on the surface of the glass plate (1, 5) in a manner of dip coating, spray coating, screen printing, manual coating or mechanical coating.
    [3]
    3. Method according to claim 1, characterized in that the metal paste is an Ag metal paste or a Cu-Ag alloy metal paste or a Ni metal paste or a metal paste of Ni-Ag alloy.
    [4]
    4. Method according to claim 1, characterized by the fact that it still comprises, in step (c), placing a sheet of brazing filler metal (3) between the metallized layers (4) of two glass plates ( 1, 5) in the corresponding sealing areas, or pre-plating a metal filler on the surface of at least one metallized layer (4), and then finishing the subsequent welding according to the metal brazing technology.
    [5]
    Method according to claim 4, characterized in that the materials of the braze filler metal sheet (3) and the braze filler metal (3) are tin alloys.
    [6]
    6. Method according to claim 1, characterized by the fact that the metal brazing technology is carried out under the protection of an inert gas atmosphere or in an atmosphere of H2 or N2.
    [7]
    7. Method, according to claim 1, characterized by the fact that the metal brazing technology is performed in
    Petition 870190105573, of 10/18/2019, p. 19/28
    3/3 a vacuum environment.
    [8]
    8. Method according to claim 1, characterized by the fact that the metal brazing technology is carried out by local heating of the sealing area by means of laser heating, flame heating, heating with electric current, heating by microwave induction or heating.
    类似技术:
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    同族专利:
    公开号 | 公开日
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    JP2014076946A|2014-05-01|
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    AU2010324370B2|2013-04-18|
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    BR112012012676A2|2016-07-26|
    JP2013512164A|2013-04-11|
    CN102079633B|2012-05-30|
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    KR20120083500A|2012-07-25|
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    JP2013512166A|2013-04-11|
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    JP5373202B2|2013-12-18|
    RU2520973C2|2014-06-27|
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    AU2010324370A1|2012-06-14|
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    法律状态:
    2018-04-10| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2018-12-04| B06T| Formal requirements before examination [chapter 6.20 patent gazette]|Free format text: O DEPOSITANTE DEVE RESPONDER A EXIGENCIA FORMULADA NESTE PARECER POR MEIO DO SERVICO DE CODIGO 206 EM ATE 60 (SESSENTA) DIAS, A PARTIR DA DATA DE PUBLICACAO NA RPI, SOB PENA DO ARQUIVAMENTO DO PEDIDO, DE ACORDO COM O ART. 34 DA LPI.PUBLIQUE-SE A EXIGENCIA (6.20). |
    2019-07-23| B07A| Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]|
    2019-12-03| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2020-01-21| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 02/11/2010, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    CN200910250137|2009-11-27|
    PCT/CN2010/078326|WO2011063704A1|2009-11-27|2010-11-02|Compound sealing method for glass plates|
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