CN102452801B - A kind of vacuum glass sealing method and products thereof - Google Patents

Abstract

The invention discloses a vacuum glass sealing method. In the method, firstly, a metal layer solidified with the glass plate is prepared on the surface of the glass plate through an ultrasonic welding process; Sealing, or connecting the metal sealing sheet by airtight welding between the metal layers of the two glass plates to be sealed, so as to realize the airtight sealing of the edges of the two glass plates. The invention uses the ultrasonic welding process to set a metal layer on the surface of the glass plate, and based on the metal layer, adopts the welding process to hermetically seal the edges of the two glass plates, thus providing a new technical approach for making vacuum glass. The tempered vacuum glass produced by the method of the present invention not only has the advantages of firm connection of the sealing part, high air tightness, and good thermal shock resistance, but also the sealing structure composed of metal sealing sheets can well adapt to vacuum The temperature deformation of the inner and outer glass plates due to the temperature difference provides a technical guarantee for the safe use of vacuum glass.

Description

A vacuum glass sealing method and product thereof

technical field

The invention relates to a vacuum glass sealing method and its product.

Background technique

Vacuum glass, which is composed of multiple glass plates, has attracted people's attention due to its excellent sound insulation, heat insulation, and thermal insulation properties, and has become a subject of intense research.

Earlier, people used various plastic or resin materials to seal the edges of glass plates to make vacuum glass. For example, some patent documents mention the use of PC, ABS, LDPE, PVC and other plexiglass as sealing materials, and some patent documents use laminated glass materials such as PVB and EVA (EN), and the processing methods are to use the above materials After being placed between two glass plates, it is made into a prefabricated part together with the glass plate, and then the prefabricated part is placed under appropriate conditions for pressing to realize the sealing of the edge of the glass plate. This process is similar to the process of making laminated glass. Although composite sealing between glass plates can be achieved, the gas permeability and moisture permeability of most plastic and resin materials are much greater than those of glass. Moreover, most organic materials It is only physically bonded to the surface of the glass plate, and it is difficult to ensure that the joint does not leak. Once gas (including water vapor) infiltrates, it will directly lead to weakening of the sealing strength, condensation in the interlayer, and mildew of the glass. In addition, as time goes by, the aging problem of organic materials also directly affects the service life of vacuum glass. Therefore, the above method has gradually faded out of the vacuum glass making.

Later, people invented the use of low-melting point glass frit as a sealing material to make vacuum glass, that is: first place low-melting point glass frit on the edge of two adjacent glass plates to be sealed, and then make the low-melting point glass frit seal by flame or electric heat. The glass frit is melted to join the two glass sheets in an airtight manner at the edges. Because the low-melting glass frit used in this process is usually lead-zinc (PbO-ZnO) glass frit, the lead metal in it will endanger the environment and human health. Therefore, there is an environmental risk in long-term use; The heating temperature is generally around 400°C to 500°C. The glass plates sealed by this process will produce edge thermal stress, and proper annealing treatment is required, which greatly reduces production efficiency and increases processing costs.

Contents of the invention

Aiming at the problems existing in the prior art, the object of the present invention is to provide a vacuum glass sealing method with simple process, reliable sealing and firmness. The invention also provides a vacuum glass product processed according to the sealing method of the invention.

In order to achieve the above object, the vacuum glass sealing method of the present invention is specifically:

1) Prepare a metal layer solidified with the glass plate on the surface to be sealed at the edge of the glass plate, the metal layer is made of metal foil, and is welded and fixed on the surface of the glass plate by ultrasonic welding;

2) Using the metal brazing process, directly airtightly weld and connect the metal layers corresponding to each other on the two glass plates to be sealed, so as to realize the airtight sealing of the edges of the two glass plates; or, by The metal sealing sheets are airtightly welded between the metal layers of the two glass plates, so as to realize the airtight sealing of the edges of the two glass plates.

When adopting the metal brazing process to weld and connect the metallized layers on the two glass plates, firstly, a solder metal foil is placed between the corresponding metallized layers on the two glass plates, or at least one of the metallized layers is placed between the two glass plates. The surface of the chemical layer is pre-plated with solder metal, and then the subsequent welding is completed according to the metal brazing process.

Further, the material of the solder metal foil and the solder metal is tin alloy solder.

Further, the metal brazing process is carried out under the protection of an inert gas, or in an H ₂ gas or N ₂ gas environment, or in a vacuum environment.

Further, the brazing temperature of the metal brazing process is ≤350°C.

When the metal sealing sheet is used to hermetically seal the edges of the two glass plates, the metal sealing sheet can be composed of one metal sheet or two metal sheets.

Further, the metal sealing sheet is composed of two metal sheets, and when the edges of the two glass plates are hermetically sealed, the two metal sheets first pass through a metal brazing process, and are alternatively connected to the two sheets to be sealed. The metal layers on the two glass plates are airtightly welded, and then the two metal sheets are airtightly welded to realize the airtight sealing of the edges of the two glass plates.

Further, after the two metal sheets are drawn out of the connected glass plates, they are airtightly welded to each other by metal brazing process, ultrasonic welding process or fusion welding process.

Further, the two metal sheets are led out from between the two sealed glass plates, and the two metal sheets are airtightly welded to the metal layers on the inner surfaces of the sealed two glass plates respectively.

Further, one of the two metal sheets is led out from between the two sealed glass sheets, and is airtightly welded to the metal layer on the inner surface of one of the glass sheets, and the other metal sheet is connected to the other sheet. Said metal layers are hermetically welded on the outer surface of the glass pane.

Further, the two metal sheets are airtightly welded to the metal layers on the outer surfaces of the two glass plates to be sealed.

Further, the metal layer is prepared on the edge of the glass plates to be sealed; the metal sealing sheet is composed of a metal sheet, and the metal sheet is respectively connected to the two sheets to be sealed by a metal brazing process. Said metal layers on the glass plate are hermetically welded.

Furthermore, the metal sealing sheet is composed of a U-shaped metal sheet, and the two sides of the U-shaped metal sheet are airtightly welded to the metal layers on the two glass plates to be sealed.

Further, the U-shaped metal sheet is located between the two sealed glass plates, and its side is airtightly welded to the metal layer through a metal brazing process.

Further, the two sides of the U-shaped metal sheet are located between the two sealed glass plates, and are airtightly welded to the metal layer through a metal brazing process, and the bottom part of the U-shaped section on the metal sheet extends to the two sides. outside the glass pane.

Further, one side of the U-shaped metal sheet is located between the two glass plates to be sealed, and is airtight with the metal layer on the inner surface of one of the glass plates through a metal brazing process or an ultrasonic welding process For welding connection, after the other side of the metal sheet goes around the edge of another glass plate, it is airtightly welded to the metal layer on the outer surface of the glass plate through a metal brazing process or an ultrasonic welding process.

Further, the U-shaped metal sheet covers the edges of the two glass plates to be sealed, and its two sides are respectively airtight with the metal layers on the outer surfaces of the two glass plates through a metal brazing process or an ultrasonic welding process. Solder connection.

A vacuum glass, comprising two or more glass plates combined with each other, the periphery of the vacuum glass is sealed according to the above sealing method.

The invention uses the ultrasonic welding process to set a metal layer on the surface of the glass plate, and based on the metal layer, adopts the welding process to hermetically seal the edges of the two glass plates, thus providing a new technical approach for making vacuum glass. The vacuum glass produced by the method of the present invention not only has the advantages of firm connection of the sealing part, high air tightness, good thermal shock resistance, etc., but also the sealing structure composed of metal sealing sheets can well adapt to vacuum glass The temperature deformation of the inner and outer glass plates due to the temperature difference provides a technical guarantee for the safe use of vacuum glass.

Description of drawings

Fig. 1 is the schematic diagram that the surface of the present invention is prepared with the glass plate of metal layer;

Fig. 2 is a structural schematic diagram of embodiment 1 of the vacuum glass of the present invention;

Fig. 3 is a structural schematic diagram of Embodiment 2 of the present invention;

Fig. 4 is a schematic structural diagram of Embodiment 3 of the present invention;

Fig. 5 is a schematic structural view of the metal sealing sheet 7 in Fig. 4;

Fig. 6 is a schematic structural diagram of Embodiment 4 of the present invention;

Fig. 7 is a schematic structural diagram of Embodiment 5 of the present invention;

Fig. 8 is a schematic structural diagram of Embodiment 6 of the present invention;

Fig. 9 is a schematic structural diagram of Embodiment 7 of the present invention;

Fig. 10 is a schematic structural diagram of Embodiment 8 of the present invention;

Fig. 11 is a schematic structural diagram of Embodiment 9 of the present invention;

Fig. 12 is a schematic structural diagram of Embodiment 10 of the present invention;

Fig. 13 is a schematic structural diagram of Embodiment 11 of the present invention;

Fig. 14 is a schematic structural diagram of Embodiment 12 of the present invention;

Fig. 15 is a schematic structural diagram of Embodiment 13 of the present invention;

Fig. 16 is a schematic structural diagram of Embodiment 14 of the present invention.

In the figure, 1 is the metal layer prepared on the glass plate, 2 is the upper glass plate, 3 is the lower glass plate, 4 is the middle support, 5 is the vacuum space between the two glass plates, and 6 is the middle glass plate , 7 is the metal sealing sheet, 7-1 is the upper side of the U-shaped metal sealing sheet, 7-2 is the lower side of the U-shaped metal sealing sheet, 7a is the upper metal sheet , 7b is the next metal sheet.

detailed description

The present invention will be further described below in conjunction with accompanying drawing.

When making vacuum glass according to the sealing method of the present invention, first, prepare a metal layer solidified with the glass plate on the surface to be sealed at the edge of the glass plate, the metal layer is made of metal foil, and is welded on the glass by ultrasonic welding. On the surface of the plate, the prepared metal layer 1 is as shown in Figure 1; then, the two glass plates 2,3 to be sealed are combined according to the state shown in Figure 2, and are placed on the two glass plates 2,3 Metal brazing solder is set between the two corresponding metal layers 1; finally, the metal brazing process is used to directly connect the metal layers 1 corresponding to each other on the two glass plates by air-tight welding, so as to realize the sealing of the edges of the two glass plates. hermetic seal.

In Fig. 2, 4 is an intermediate support arranged between the two glass plates 2, 3, and 5 is the vacuum space formed between the two glass plates 2, 3 after sealing.

Arranging metal brazing solder between the corresponding metal layers 1 on the two glass plates can be carried out by placing brazing metal foil, or pre-plating brazing metal on the surface of at least one of the metal layers 1, Then, the subsequent welding is completed according to the metal brazing process.

The material of choice for the solder metal foil and pre-plated solder metal can be tin alloy solder.

The above brazing welding process can be carried out under the protection of inert gas, or in H ₂ gas or N ₂ gas environment, and can also be carried out in a vacuum environment, which helps to improve the quality of brazing welding.

Because the metal layers 1 on the two glass plates are welded and connected to each other through the metal brazing process, naturally, the metal material constituting the metal layer should be a metal material suitable for brazing.

In order to avoid the influence of the welding process on the performance of the glass plate, the brazing temperature of the metal brazing process should be controlled to be ≤350°C.

The metal brazing process can adopt various appropriate heating methods such as induction heating, laser heating, and microwave heating.

Shown in Fig. 2 is the vacuum glass that is formed by compounding two glass plates, according to the above-mentioned sealing method of the present invention, also can process the vacuum glass that is compounded by 3 or more than 3 glass plates shown in Fig. 3, The difference from the vacuum glass in Fig. 2 is that in the vacuum glass shown in Fig. 3, metal layers 1 need to be prepared on the upper and lower sides of the glass plate 6 in the middle layer, so as to be in contact with the metal layers on the upper and lower glass plates respectively. Layer 1 solder connection.

In the sealing method of the present invention, after completing the preparation of the metal layer 1 on the surface of the glass plates, in addition to directly welding and connecting the metal layers 1 on the two glass plates using a metal brazing process to seal the edges of the two glass plates, A metal brazing process can be used to airtightly weld and connect the metal sealing sheet between the metal layers 1 of the two glass plates to be sealed, so as to realize the hermetic sealing of the edges of the two glass plates, and the metal sealing The sheet may consist of one metal sheet or two metal sheets.

When the metal sealing sheet is composed of a metal sheet, the metal sheet may be a U-shaped metal sheet. Taking Embodiment 3 in FIG. 4 as an example, the sealing method of sealing the edges of two glass plates with a U-shaped metal sheet will be described below.

First, as described above, the metal layer 1 shown in Figure 1 is prepared on the surface to be sealed at the edge of the glass plate by ultrasonic welding; then, the upper and lower glass plates 2, 3 are combined according to the state shown in Figure 4, Between the metal layers 1 of the two glass plates, a metal sheet 7 with a U-shaped cross-section as shown in Figure 5 is arranged, so that the two side edges 7-1, 7-2 of the metal sheet 7 are respectively connected to the upper and lower two glass plates. The metal layer 1 is opposite, and brazing material is set between the metal sheet sides 7-1, 7-2 and the metal layer 1; finally, the metal sheet 7 two sides 7-1, 7- 2 and the respective corresponding metal layers 1 are airtightly welded to complete the airtight sealing of the edges of the two glass plates 2 and 3 .

Since the metal sheet 7 is connected to the metal layer 1 by brazing, the U-shaped metal sheet 7 should also be made of a metal suitable for brazing.

Figure 6 shows Embodiment 4 of the present invention. In this embodiment, the two sides 7-1 and 7-2 of the U-shaped metal sheet 7 are located between the two upper and lower glass plates that are sealed, and pass through The metal brazing process is airtightly welded and connected with the metal layer 1, and the bottom part of the U-shaped section on the metal sheet 7 protrudes out of the two glass plates. Compared with the embodiment 3 in FIG. 4 , the metal sheet 7 in this embodiment has a larger deformation margin, which can accommodate the larger temperature deformation of the two glass plates relative to each other.

In embodiment 5 shown in FIG. 7 , the metal sheet 7 with a U-shaped cross-section covers the edges of the upper and lower glass plates 2 and 3 that are sealed, and the two sides 7-1, 7- 2 are airtightly welded and connected to the metal layer 1 on the outer surfaces of the two glass plates 2 and 3 respectively.

In Embodiment 6 shown in Figure 8, one of the side edges of the U-shaped metal sheet 7 is located between the two glass plates that are sealed, and is in contact with the metal layer 1 on the inner surface of the lower glass plate. Tight welding connection, the other side of metal sheet 7 walks around the edge of the last glass plate and is connected with the metal layer 1 on the outer surface of the last glass plate by airtight welding.

It should be pointed out that when making the vacuum glass shown in Fig. 7 and Fig. 8, both sides of the metal sheet 7 and the metal layer 1 can be airtightly welded and connected to each other by a metal brazing process, or can be connected by an ultrasonic welding process. Mutual gas-tight welding connection.

The vacuum glass in the above-mentioned embodiments shown in Fig. 4-Fig. 8 is composed of two glass plates, and the metal sheet 7 with a U-shaped cross section is used as the metal sealing sheet, and it is also possible to make a glass containing 3 or more than 3 sheets. Plate of vacuum glass.

In the embodiment 7 shown in Fig. 9, the vacuum glass is formed by compounding three glass plates, and the difference from the vacuum glass compounded by two glass plates is that both sides of the glass plate 6 in the middle are prepared. The metal layer 1 is so as to be hermetically sealed to the two glass plates above and below by the metal sheet 7 having a U-shaped cross section.

As shown in Figure 10, Embodiment 8 of the present invention is shown. When the metal sealing sheet in this embodiment is composed of two metal sheets, the sealing steps are as follows:

First, as mentioned above, the metal layer 1 shown in Figure 1 is prepared on the surface to be sealed at the edge of the glass plate through an ultrasonic welding process; 7a, 7b are airtightly welded to the metal layer 1 on the upper and lower glass plates 2, 3 respectively, and the metal sheet is drawn out of the glass plates to which it is connected; finally, the two glass plates 2, 3 are connected as shown in Fig. The state shown in 10 is combined, and the parts of the two metal sheets 7a, 7b protruding from the two glass plates are airtightly welded to each other, so as to realize the airtight sealing of the edges of the two glass plates 2, 3.

For the connection between the parts of the two metal sheets 7a, 7b protruding outside the glass plate, the two can be airtightly welded to each other by using a metal brazing process, an ultrasonic welding process or a fusion welding process.

Figure 11 shows Embodiment 9 of the present invention, compared with Embodiment 8, the metal sheet 7b in Embodiment 9 is drawn from between two glass plates 2,3, and is connected with the metal layer 1 on the inner surface of the glass plate 3 Gas-tight welding connection, the metal sheet 7a is connected to the metal layer 1 on the outer surface of the glass plate 2 by gas-tight welding.

Fig. 12 shows embodiment 10 of the present invention. In this embodiment, two metal sheets 7a, 7b are airtightly welded to the metal layer 1 on the outer surface of two glass plates 2, 3 respectively.

Fig. 13 shows the embodiment 11 of the present invention, the vacuum glass in this embodiment is compounded by 3 glass plates, as mentioned above, the upper and lower surfaces of the glass plate 6 in the middle will prepare the metal layer 1, so that through The metal sheets 7a, 7b are hermetically sealed to the two glass plates above and below them respectively.

Fig. 14 shows embodiment 12 of the present invention, as a kind of special implementation mode of the present invention, in this embodiment, metal layer 1 is prepared on the edge of glass plates 2,3, and two glass plates 2,3 The edges are sealed by a piece of metal sealing sheet 6, and the metal sealing sheet 6 is airtightly welded and connected to the metal layer 1 on the edge of the two glass plates respectively through a metal brazing process.

In order to enable the metal sealing sheet 6 to adapt to the relatively large expansion and contraction deformation at the edge of the inner and outer glass plates due to the temperature difference, as shown in embodiment 13 in Figure 15, the middle part of the metal sealing sheet 6 in embodiment 12 can be Sets arc connection segments.

The embodiment shown in Fig. 14 and Fig. 15 has simple structure and convenient operation, and is especially suitable for adopting when the thickness of the glass plate is relatively large.

Because the sealing method of the present invention no matter prepares the metal layer on the surface of the glass plate in the early stage or the welding process in the later stage, the heating range of the glass plate is controlled at the edge of the glass plate to be sealed, and the heating time of the glass plate is very short. The impact on the performance is very small, therefore, the sealing method of the present invention can directly use the tempered glass plate to make the tempered vacuum glass without affecting the tempering properties of the tempered glass plate.

Similarly, when the sealing method of the present invention is used to process the curved vacuum glass shown in Figure 16, the shape of the curved glass plate will not be affected, thereby greatly simplifying the processing technology of the curved vacuum glass and improving the processing efficiency.

The above examples are only used to illustrate the present invention, and the embodiments of the present invention are not limited to these examples, and various specific implementations made by those skilled in the art that conform to the idea of the present invention are within the protection scope of the present invention.

Claims (20)

1. A vacuum glass sealing method, characterized in that, the sealing method is specifically: 1) Prepare a metal layer consolidated with the glass plate on the surface to be sealed at the edge of the glass plate, the metal layer is made of metal foil, and is welded on the surface of the glass plate by ultrasonic welding; 2) Using the metal brazing process, the metal layers corresponding to each other on the two glass plates to be sealed are directly airtightly welded to each other, so as to realize the airtight sealing of the edges of the two glass plates; or, by The metal sealing sheets are airtightly welded between the metal layers of the two glass plates, so as to realize the airtight sealing of the edges of the two glass plates. 2. The method according to claim 1, wherein the metal sealing sheet is composed of two metal sheets, and when the edges of the two glass plates are hermetically sealed, the two metal sheets first pass through the metal The brazing process is to alternatively connect the metal layers of the two glass plates to be sealed by airtight welding, and then connect the two metal sheets by airtight welding to realize the sealing of the edges of the two glass plates. hermetic seal. 3 . The method according to claim 2 , wherein the two metal sheets are airtightly welded to each other by a metal brazing process, an ultrasonic welding process or a melting welding process after being led out of the connected glass plates. 4. The method according to claim 3, wherein the two metal sheets are drawn between the two glass plates that are sealed, and the two metal sheets are respectively connected to the inside of the two glass plates that are sealed. The metal layers on the surface are hermetically soldered connected. 5. The method according to claim 3, wherein one of the two metal sheets is drawn out from between the two glass plates to be sealed, and is connected to the metal on the inner surface of one of the glass plates. The other metal sheet is airtightly welded to the metal layer on the outer surface of another glass plate. 6. The method according to claim 3, wherein the two metal sheets are airtightly welded to the metal layers on the outer surfaces of the two glass plates to be sealed. 7. The method according to claim 1, wherein the metal layer is prepared on the edge of the glass plates to be sealed; the metal sealing sheet is made of a metal sheet, and the metal sheet passes through the metal The brazing process is respectively airtightly welded and connected to the metal layers on the two glass plates to be sealed, so as to realize the airtight sealing of the edges of the two glass plates. 8. The method according to claim 7, wherein an arc is arranged between the two parts of the metal sheet that are respectively connected to the metal layers on the two glass plates to be sealed by airtight welding. shape link. 9. The method according to claim 1, wherein the metal sealing sheet is made of a U-shaped metal sheet, and the two sides of the U-shaped metal sheet are respectively connected to the two glass plates to be sealed. Hermetic solder connection on the metal layer. 10. The method according to claim 9, wherein the U-shaped metal sheet is located between the two sealed glass plates, and its side edges are airtightly welded to the metal layer by a metal brazing process . 11. The method according to claim 9, wherein the two sides of the U-shaped metal sheet are located between the two sealed glass plates, and are hermetically welded to the metal layer by a metal brazing process Connection, the bottom part of the U-shaped section on the metal sheet protrudes beyond the two glass sheets. 12. The method according to claim 9, wherein one side of the U-shaped metal sheet is located between the two glass plates to be sealed, and is connected to it by a metal brazing process or an ultrasonic welding process. The metal layer on the inner surface of a glass plate is airtightly welded, and the other side of the metal plate is passed around the edge of another glass plate, and is connected to the outer surface of the glass plate through a metal brazing process or an ultrasonic welding process. The metal layers are hermetically soldered connected. 13. The method according to claim 9, wherein the U-shaped metal sheet covers the edges of the sealed two glass plates, and its two sides are respectively connected to the two glass plates by a metal brazing process or an ultrasonic welding process. The metal layer on the outer surface of the glass pane is hermetically welded. 14. The method according to any one of claims 1-13, characterized in that, when performing the metal brazing process, firstly, between the two metal layers to be welded each other or between the metal layer and the metal layer A brazing filler metal foil is placed between the metal sheets or between two of the metal sheets, or brazing filler metal is pre-plated on at least one of the metal layers or the surface of the metal sheets, and then subsequent welding is completed according to the metal brazing process. 15. The method of claim 14, wherein the material of the solder metal foil and the solder metal is tin alloy solder. 16. The method according to claim 14, wherein the metal brazing process is carried out under the protection of an inert gas, or in an H ₂ gas or N ₂ gas environment, or in a vacuum environment. 17. The method according to claim 14, characterized in that, the welding temperature of the metal brazing process is ≤350°C. 18. A vacuum glass, comprising two or more than two glass plates compounded with each other, characterized in that the periphery of the vacuum glass is sealed according to any one of claims 1-17. 19. A tempered vacuum glass, which is directly composed of two or more than two tempered glass plates, characterized in that the periphery of the tempered vacuum glass is sealed according to any one of claims 1-17 catch. 20. A curved vacuum glass, comprising two or more than two curved glass plates compounded with each other, characterized in that the periphery of the curved vacuum glass is sealed according to any one of claims 1-17.