A vacuum pumping box for mass-producing vacuum glass and a vacuum glass production process

Abstract

The present invention discloses a vacuum pumping box for producing vacuum glass, which is characterized in that: it includes a bottom box pressing plate and an upper cover; a vacuum pumping hole is provided on the side wall of the bottom box; the pressing plate includes an upper pressing plate and a lower pressing plate, the upper pressing plate and the lower pressing plate are pressed against both end faces of the substrate vacuum glass, and the pressing surfaces of the upper pressing plate and the lower pressing plate in contact with the corresponding side end faces of the vacuum glass are adapted to the shapes of the end faces of the corresponding sides of the vacuum glass; the upper cover can be covered on the bottom box. At the same time, a production process of vacuum glass using the vacuum pumping box is disclosed. By designing a vacuum pumping box, the present invention makes full use of the internal volume of the heating furnace, eliminates the waiting time for cooling during the production process, improves the production efficiency, and makes the vacuum glass heat more evenly and have better stability while the pressing plate presses the vacuum glass.

Description

Technical Field

[0001] The present invention belongs to the technical field of vacuum glass production, and particularly relates to a vacuum pumping box for producing vacuum glass and a vacuum glass production process using the vacuum pumping box. Background Art

[0002] Vacuum glass is a new type of glass deep-processing product, which is developed based on the principle of a thermos flask. The structure of vacuum glass is similar to that of insulating glass, but the difference is that the gas in the cavity of vacuum glass is very thin, almost approaching a vacuum. Vacuum glass is formed by hermetically sealing the four sides of two flat glass plates, evacuating the gap between them to a vacuum and sealing the exhaust holes. The gap between the two glasses is 0.3 - 0.5 mm. Generally, at least one of the two glasses of vacuum glass is a low-emissivity glass, so that the heat dissipated through conduction, convection, and radiation through the vacuum glass is reduced to the lowest level. Its working principle is the same as the heat insulation principle of a glass thermos flask.

[0003] The existing technology is to put vacuum glass into a vacuum autoclave for processing. Most of the existing vacuum autoclaves are designed as cylinders. As Figure 1 shown, when heating, the vacuum glass is placed vertically and parallel. To make full use of the volume inside the vacuum autoclave, vacuum glass of different sizes needs to be placed. This will cause space waste when mass-producing vacuum glass of the same size, and it is also difficult to position and press when heating curved vacuum glass. At the same time, since the heating is carried out in a vacuum environment, the traditional heat convection method cannot be used to heat inside the vacuum furnace, and only radiation heating can be carried out through heating rods installed on the inner wall of the vacuum furnace. Therefore, in actual heating, the energy on the outer circle radiates inward, resulting in a higher temperature on the outer circle, while the temperature inside rises slowly. It is difficult to balance and stabilize the overall furnace temperature, the heating speed cannot be increased quickly, and the heating efficiency is slow. Moreover, after the existing vacuum autoclave finishes heating, it is necessary to wait for the internal temperature to gradually drop before the finished vacuum glass can be taken out, and a new batch of base material tempered glass needs to be put in for reheating, resulting in poor production efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a vacuum pumping box for producing vacuum glass and a vacuum glass production process, so as to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A vacuum pumping box for producing vacuum glass, characterized in that: it includes a bottom box 1, a pressing plate 2 and an upper cover 3; a vacuum pumping hole 4 is provided on the side wall of the side of the bottom box 1; the pressing plate 2 includes an upper pressing plate 5 and a lower pressing plate 6, the upper pressing plate 5 and the lower pressing plate 6 are pressed against both side end faces of the base material vacuum glass 9, and the pressing surfaces of the upper pressing plate 5 and the lower pressing plate 6 in contact with the corresponding side end faces of the vacuum glass are adapted to the shapes of the end faces of the corresponding sides of the vacuum glass; the upper cover 3 can be covered on the bottom box 1;

[0007] Further, the pressing plate 2 is elastically supported in the vacuum pumping box 10, and the upper pressing plate 5 and the lower pressing plate 6 are elastically pressed against both side end faces of the vacuum glass in opposite directions.

[0008] Further, a plurality of springs 7 are provided on the outer end faces of the pressing plate 2 on the side opposite to the shaping surface, and the pressing plate 2 is elastically supported in the vacuum pumping box 10 through the springs 7.

[0009] Further, the upper pressing plate 5 and the lower pressing plate 6 are provided with fixing holes 8, and the number of fixing holes 8 on the upper pressing plate 5 and the lower pressing plate 6 is the same and the positions correspond to each other, and fixing columns can be inserted, which can play a fixing role when producing vacuum glass of smaller sizes.

[0010] Further, the spring 7 is a constant pressure spring, and when the pressing plate 2 is placed statically in the bottom box 1, the heights of the tops of the springs 7 on the upper pressing plate are the same.

[0011] Further, a sealing ring is provided at the joint where the upper cover 3 is covered with the bottom box 1.

[0012] A vacuum glass production process using the above-mentioned vacuum pumping box, characterized by including the following steps:

[0013] 1) Prepare the base material tempered glass;

[0014] 2) Put the prepared base material tempered glass into a sealing edge coating machine, and coat a sealing edge material on the edge of the base material tempered glass;

[0015] 3) Put the glass coated with the sealing edge material into a sintering furnace to bake and cure the sealing edge material, and obtain the sealed edge glass;

[0016] 4) Paste a support on one side surface of the sealed edge glass, press two sealed edge glasses with the same shape against each other, and ensure that the support is placed between the two sealed edge glasses to obtain the base material vacuum glass 9;

[0017] 5) Press the base material vacuum glass 9 with the pressing plate 2, place it in the bottom box 1, and cover the upper cover 3;

[0018] 6) Send multiple evacuation boxes 10 containing the base material vacuum glass 9 into the sintering equipment, evacuate and heat the evacuation boxes synchronously. After the vacuum value reaches the standard and the heating is completed, move the evacuation box 10 to the cooling area;

[0019] 7) In the cooling area, perform the operations of boosting pressure and cooling the evacuation box. After returning to normal temperature and pressure, the finished vacuum glass can be obtained.

[0020] Further, the base material tempered glass is flat tempered glass. The process of preparing flat tempered glass is as follows: Cut, grind the edges, temper and then clean two pieces of flat glass to obtain the base material flat tempered glass;

[0021] Further, the base material tempered glass is curved tempered glass. The process of preparing curved tempered glass is as follows: Cut, grind the edges, and clean two pieces of flat glass, then perform curved bending and tempering according to the designed curved surface requirements to obtain the base material curved tempered glass;

[0022] Further, in step 4), the two edge-sealing glasses that are mutually pressed are: two edge-sealing glasses both pasted with supports; Fit the two edge-sealing glasses pasted with supports to each other, and ensure that the supports of the two edge-sealing glasses are placed between the two edge-sealing glasses.

[0023] Or, the two edge-sealing glasses that are mutually pressed are: One edge-sealing glass pasted with a support is fitted with an edge-sealing glass without a pasted support, and ensure that the support is placed between the two edge-sealing glasses;

[0024] Advantages of the present invention:

[0025] The present invention designs an evacuation box with a simple structure and low production cost. It can be customized with corresponding sizes according to production requirements, or multiple pieces of base material glass can be placed in one bottom box 1 to make full use of the internal volume of the bottom box 1 to improve production efficiency. During the heating process, the upper and lower surfaces of the evacuation box are parallel to the glass, and the sintering equipment can heat the upper and lower sides of the evacuation box simultaneously. The heat conduction performance of the pressing plate can also make the surface heat of the base material glass more uniform. When heating the curved vacuum glass, the pressing fixture can prevent the curved vacuum glass from deforming when the temperature rises through pressing. After the heating is completed, the evacuation box in the sintering equipment can be directly transferred to the cooling area for cooling treatment, and at the same time, a new batch of base material glass can be loaded into the sintering furnace for heating, saving the waiting time in the process of cooling and boosting pressure in the prior art and improving the production efficiency of the production line. Description of the drawings

[0026] Figure 1 It is a schematic diagram of placing vacuum glass in an existing vacuum autoclave

[0027] Figure 2 It is a structural diagram of the evacuation box

[0028] Figure 3 Schematic diagram of laminating a curved substrate vacuum glass with a laminating plate 2

[0029] Figure 4 Schematic diagram of a tunnel furnace heating and vacuum pumping box

[0030] The meanings represented by the reference numerals in the drawings are as follows:

[0031] 1 - bottom box, 2 - laminating plate, 3 - upper cover, 4 - vacuum pumping hole, 5 - upper laminating plate, 6 - lower laminating plate, 7 - spring, 8 - fixing hole, 9 - substrate vacuum glass, 10 - vacuum pumping box, 11 - radiation rod, 13 - driving roller Specific implementation mode

[0032] The present invention will be further described below with reference to the drawings.

[0033] A vacuum pumping box for producing vacuum glass, comprising a bottom box 1, a laminating plate 2 and an upper cover 3; a vacuum pumping hole 4 is provided on the side wall of the bottom box 1, and the vacuum pumping hole 4 is a one-way valve, which can be a vacuum joint or a vacuum interface and other structures; the laminating plate 2 includes an upper laminating plate 5 and a lower laminating plate 6, and the upper laminating plate 5 and the lower laminating plate 6 are specifically heat-conducting mesh plates with good heat-conducting performance. The upper laminating plate 5 and the lower laminating plate 6 are pressed on both side end faces of the substrate vacuum glass 9, and the laminating surfaces of the upper laminating plate 5 and the lower laminating plate 6 in contact with the corresponding side end faces of the vacuum glass are adapted to the shapes of the corresponding side end faces of the vacuum glass. The length of a pair of side edges on the top view of the laminating plate 2 is slightly less than the length of the short side of the top view of the bottom box 1, and the length of the long side of the top view of the bottom box 1 is slightly greater than an integer multiple of the length of the other pair of side edges of the top view of the laminating plate 2; when producing flat vacuum glass, the corresponding side end face is a plane, and when producing curved vacuum glass, the corresponding side end face is a curved surface adapted to the surface of the curved vacuum glass. Before the substrate vacuum glass is heated, the gap between the upper and lower glass sheets of the substrate vacuum glass is between 0.5 and 1.0 mm. After continuous heating, the edge-sealing glue gradually melts and is gradually compressed to between 0.3 and 0.5 mm by the pressing of the upper and lower laminating plates. While heating, the upper and lower glass sheets of the substrate vacuum glass are pressurized to realize the function of glass lamination; the upper cover 3 can be covered on the bottom box 1, and the airtightness in the vacuum pumping box can be maintained after covering.

[0034] The laminating plate 2 is elastically supported in the vacuum pumping box 10, and the upper laminating plate 5 and the lower laminating plate 6 are elastically pressed against both side end faces of the vacuum glass in opposite directions.

[0035] A number of springs 7 are provided on the outer end face of the laminating plate 2 on the side opposite to the shaping surface. The laminating plate 2 is elastically supported in the vacuum pumping box 10 through the springs 7. The springs 7 have elastic columns and damping and shock-absorbing structures to avoid shaking or oscillation during the transmission process.

[0036] The upper pressing plate 5 and the lower pressing plate 6 are provided with fixing holes 8. The number of fixing holes 8 on the upper pressing plate 5 and the lower pressing plate 6 is the same and the positions correspond to each other. Fixing columns can be inserted. The height of the fixing columns is higher than the height of the fixing holes 8 on the upper pressing plate and less than the height of the side wall of the bottom box 1. When producing vacuum glass with a smaller size, inserting the fixing columns into the appropriate fixing holes can play a role in fixing the vacuum glass.

[0037] The spring 7 is a constant-pressure spring. When the pressing plate 2 is placed statically in the bottom box 1, the heights of the tops of the springs 7 located on the upper pressing plate are the same and higher than the height of the side wall of the bottom box 1. When the upper cover 3 is closed on the bottom box 1, the frictional force between the upper cover 3 and the side wall of the bottom box 1 is greater than the elastic force of the spring 7 on the upper cover 3. Forms such as snap-fasteners can also be adopted to make the upper cover 3 close more firmly.

[0038] A sealing ring is provided at the joint where the upper cover 3 and the bottom box 1 are closed, which can further improve the airtightness of the evacuated box after the upper cover 3 is closed.

[0039] Temperature sensors and pressure sensors can be installed on the inner wall of the evacuated box, which are wirelessly connected to an external display device to display the pressure and temperature states inside the evacuated box in real time.

[0040] A vacuum glass production process using the above-mentioned evacuated box is characterized by including the following steps:

[0041] 1) Prepare the base material tempered glass;

[0042] 2) Put the prepared base material tempered glass into an edge-sealing coater and coat an edge-sealing material on the edge of the base material tempered glass;

[0043] 3) Put the glass coated with the edge-sealing material into a sintering furnace to bake and cure the edge-sealing material, and obtain edge-sealed glass;

[0044] 4) Paste supports on one side of the edge-sealed glass, press two edge-sealed glasses with the same shape against each other, and ensure that the supports are placed between the two edge-sealed glasses to obtain the base material vacuum glass 9;

[0045] 5) Press the base material vacuum glass 9 with the pressing plate 2, place it in the bottom box 1, and cover the upper cover 3;

[0046] 6) Send multiple evacuated boxes 10 containing the base material vacuum glass 9 into a sintering device, synchronously evacuate and heat the evacuated boxes. After the vacuum value reaches the standard and the heating is completed, move the evacuated boxes 10 to a cooling area;

[0047] 7) Perform a pressure-increasing and temperature-reducing operation on the evacuated boxes in the cooling area. After returning to normal temperature and pressure, the finished vacuum glass can be obtained.

[0048] In step 1, the substrate tempered glass is prepared as a flat tempered glass. The process of preparing the flat tempered glass is as follows: two pieces of flat glass are cut, edged, tempered, and then cleaned to obtain the substrate tempered flat glass;

[0049] In step 1, the substrate tempered glass is prepared as curved tempered glass. The process of preparing the curved tempered glass is as follows: two pieces of flat glass are cut, edged, and cleaned, and then curved and tempered according to the designed curved surface requirements to obtain the substrate curved tempered glass.

[0050] In step 2, the edge sealing material is glass powder.

[0051] In step 3, the edge sealing material is baked and solidified through a cyclic sintering process.

[0052] In step 4, the two pieces of edge-sealed glass that are pressed together are: two pieces of edge-sealed glass with supports attached; the two pieces of edge-sealed glass with supports attached are attached to each other, and the supports of the two edge-sealed glasses are placed between the two edge-sealed glasses.

[0053] Alternatively, the two pieces of edge-sealed glass pressed together are: a piece of edge-sealed glass with a support attached and a piece of edge-sealed glass without a support attached, and the support is ensured to be placed between the two edge-sealed glasses.

[0054] In step 5, according to the size of the substrate vacuum glass, multiple pressing plates 2 pressed with substrate vacuum glass 9 can be placed in the same vacuum box. Since the long side of the top view of the bottom box 1 is slightly larger than an integer multiple of the length of one side of the top view of the pressing plate 2, the gaps between the multiple pressing plates 2 are small after being placed in, and the pressing plates will not slide.

[0055] In step 6, the sintering equipment can be a track heating furnace, such as Figure 4 As shown, a plurality of vacuum boxes 10 are conveyed into the track heating furnace by the transmission roller 13, and the vacuum quick-connect sockets are automatically connected to the vacuum hole 4 for vacuuming. At the same time, the upper and lower sides of the vacuum boxes are heated simultaneously by the radiation rod 11. After the vacuum value reaches the standard, the vacuum quick-connect sockets are disengaged. After heating to the temperature that meets the standard, the group of vacuum boxes is conveyed to the cooling area, and a new group of vacuum boxes is conveyed into the track heating path for heating.

[0056] Since the vacuum box has a certain thickness and fast heat conduction, it can achieve a certain temperature buffering effect. In this way, even in the case of uneven external heating, the vacuum box can first form a relatively uniform temperature, and then the secondary temperature uniformity of the pressing plate 2 can be used to make the substrate vacuum glass heated more evenly. Therefore, the production process of this technical solution can also be applied to other types of sintering equipment.

[0057] In step 7, the cooling operation of the vacuum box is natural cooling.

[0058] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, several improvements can be made without departing from the principle of the present invention, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. A vacuum pumping box for mass-producing vacuum glass, characterized in that: It includes a bottom box (1), a pressing plate (2) and an upper cover (3); a vacuum extraction hole (4) is provided on the side wall of the side of the bottom box (1); the pressing plate (2) includes an upper pressing plate (5) and a lower pressing plate (6), the upper pressing plate (5) and the lower pressing plate (6) are pressed against both side end faces of the base vacuum glass (9), and the pressing surfaces of the upper pressing plate (5) and the lower pressing plate (6) in contact with the corresponding side end faces of the vacuum glass are adapted to the shapes of the corresponding side end faces of the vacuum glass; the upper cover (3) can be covered on the bottom box (1); the lengths of a pair of side edges of the top view of the pressing plate (2) are less than the length of the short side of the top view of the bottom box (1), and the length of the long side of the top view of the bottom box (1) is greater than an integer multiple of the lengths of the other pair of side edges of the top view of the pressing plate (2); the upper pressing plate (5) and the lower pressing plate (6) are provided with fixing holes (8), the number of the fixing holes (8) on the upper pressing plate (5) and the lower pressing plate (6) is the same and the positions correspond to each other, and fixing columns can be inserted, which can play a fixing role when producing vacuum glass of a smaller size.

2. The evacuated box according to claim 1, wherein: The pressing plate (2) is elastically supported in the vacuum extraction box (10), and the upper pressing plate (5) and the lower pressing plate (6) are elastically pressed against both side end faces of the vacuum glass in opposite directions.

3. The evacuated box according to claim 2, characterized in that: A plurality of springs (7) are provided on the outer end face of the pressing plate (2) on the side opposite to the shaping surface, and the pressing plate (2) is elastically supported in the vacuum extraction box (10) through the springs (7).

4. The evacuated box according to claim 3, wherein: The spring (7) is a constant-pressure spring. When the pressing plate (2) is placed statically in the bottom box (1), the heights of the tops of the springs (7) on the upper pressing plate are the same.

5. The evacuated box according to claim 1, wherein: A sealing ring is provided at the covering position of the upper cover (3) and the bottom box (1).

6. A vacuum glass production process using the evacuation box described in claim 1, characterized in that It includes the following steps: 1) Prepare base tempered glass. 2) Put the prepared base tempered glass into an edge sealing coater, and coat an edge sealing material on the edge of the base tempered glass. 3) Put the glass coated with the edge sealing material into a sintering furnace to bake and cure the edge sealing material, and obtain edge-sealed glass. 4) Paste a support on one side surface of the edge-sealed glass, press two edge-sealed glasses with the same shape against each other, and ensure that the support is placed between the two edge-sealed glasses to obtain the base vacuum glass (9). 5) Press the base vacuum glass (9) with the pressing plate (2), place it in the bottom box (1), and cover the upper cover (3). 6) Send a plurality of vacuum extraction boxes (10) containing the base vacuum glass (9) into a sintering device, synchronously evacuate and heat the vacuum extraction boxes (10), and after the vacuum value reaches the standard and the heating is completed, move the vacuum extraction boxes (10) to a cooling area. 7) Perform a pressure increasing and temperature decreasing operation on the vacuum extraction boxes (10) in the cooling area, and the finished vacuum glass can be obtained after returning to normal temperature and pressure.

7. A vacuum glass production process according to claim 6, characterized in that: The preparation of the base tempered glass is flat tempered glass. The process of preparing flat tempered glass is as follows: Cut, grind the edges, temper and then clean two flat glass plates to obtain the base tempered flat glass.

8. A vacuum glass production process according to claim 6, characterized in that: The preparation of the base tempered glass is curved tempered glass. The process of preparing curved tempered glass is as follows: Cut, grind the edges, clean two flat glass plates, perform curved bending and tempering according to the designed curved surface requirements to obtain the base curved tempered glass.

9. A vacuum glass production process according to claim 6, characterized in that: In step 4), the two edge-sealing glasses pressed against each other are: two edge-sealing glasses each pasted with a support; the two edge-sealing glasses pasted with supports are fitted together, and it is ensured that the supports of the two edge-sealing glasses are placed between the two edge-sealing glasses. Alternatively, the two edge-sealing glasses pressed against each other are: an edge-sealing glass pasted with a support and an edge-sealing glass without a pasted support are fitted together, and it is ensured that the support is placed between the two edge-sealing glasses.

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