Tempered glass substrate production line for curved vacuum glass

Abstract

The utility model relates to the field of curved tempered vacuum glass, and discloses a production line of a tempered glass substrate for curved vacuum glass, which comprises a first sub-production line and a second sub-production line, the first sub-production line comprises a first mold for bending and cooling a first glass substrate and a first cooling device, and the second sub-production line comprises a second mold for bending and cooling a second glass substrate. The second sub-production line comprises a second mold and a second cooling device, the second mold is used for bending and cooling a second glass substrate, the first mold is provided with a first forming surface which is concave downwards, the second mold is provided with a second forming surface which is convex upwards, and the bending degree of the first forming surface is matched with the bending degree of the second forming surface. According to the utility model, the two tempered glass substrates of the curved vacuum glass are respectively manufactured through the two sub-production lines, so that the two glass substrates of the curved vacuum glass are smoothly bent, formed and tempered, and the two curved glass substrates which are matched in shape and can be combined are obtained.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of curved surface toughened vacuum glass, especially to a curved surface toughened vacuum glass substrate production line. BACKGROUND

[0002] Toughened vacuum glass is an upgraded product of vacuum glass, which not only inherits all the characteristics of vacuum glass but also has the main feature that the glass is a safety glass after toughening, and can be widely used in buildings, vehicle and ship doors and windows, heat preservation boxes and cabinets and other fields requiring transparent and heat insulation materials. In many use scenarios of vacuum glass, not only flat toughened vacuum glass is needed, but also curved surface toughened vacuum glass is in great demand.

[0003] The production process of the prior art for the flat vacuum glass using metal sealing is to first apply metal sealing material to the four peripheral edge parts of two flat glass substrates respectively, then put the two flat glass substrates into a heating furnace for overall heating to high temperature, so that the metal sealing material is fully attached to the flat glass substrates, and then cooled to form two flat toughened glass substrates. The metal sealing material is heated to melt, so as to seal the two flat glass substrates to form a flat vacuum glass.

[0004] However, since a hard support is arranged in the vacuum layer between the two glass substrates of the vacuum glass, the curved surface matching degree and profile degree of the two curved surface glass substrates are required to be very high. Moreover, since the metal sealing material is applied to the glass substrates before the glass substrates are bent and toughened, how to ensure the quality of the metal sealing material during the bending and toughening of the glass substrates is also a difficulty in the production of curved surface vacuum glass.

[0005] Due to the particularity of the curved surface toughened vacuum glass, its production is difficult, and there is no corresponding production line for the process of making curved surface vacuum glass by using two curved surface toughened glass substrates in the industry at present. UTILITY MODEL CONTENTS

[0006] In view of the problems existing in the prior art, the prior art cannot meet the requirements of the curved surface matching degree and profile degree of the two curved surface glass substrates for the curved surface toughened vacuum glass, and the purpose of the utility model is to provide a curved surface toughened vacuum glass substrate production line, which can make two toughened glass substrates for curved surface vacuum glass through two sub-production lines, can make the two glass substrates of the curved surface vacuum glass successfully bend and form and be toughened under the premise of ensuring the quality of the metal sealing material, and obtain two curved surface glass substrates with matched shapes, which can be combined.

[0007] To achieve the above purpose, the technical scheme of the utility model is as follows:

[0008] A tempered glass substrate production line for curved vacuum glass, wherein the curved vacuum glass includes a first glass substrate and a second glass substrate, and the tempered glass substrate production line includes a first sub-production line and a second sub-production line.

[0009] The first sub-production line includes a first mold and a first cooling device. The first mold is used to bend a first glass substrate, and the first cooling device is used to cool the bent first glass substrate. The second sub-production line includes a second mold and a second cooling device. The second mold is used to bend a second glass substrate, and the second cooling device is used to cool the bent second glass substrate.

[0010] The first mold includes a first lower mold, on which a first molding surface is recessed downwards, and the first glass substrate is bent to fit the first molding surface. The second mold includes a second lower mold, on which a second molding surface is protruding upwards, and the second glass substrate is bent to fit the second molding surface. The degree of bending of the first molding surface is adapted to the degree of bending of the second molding surface.

[0011] The present invention is further configured such that: the curvature of the first forming surface is greater than the target curvature of the curved vacuum glass, the curvature of the second forming surface is greater than the target curvature of the curved vacuum glass, and the curvature of the first forming surface is greater than the curvature of the second forming surface.

[0012] The present invention is further configured such that: the first sub-production line further includes a first flexible conveyor belt, and the second sub-production line further includes a second flexible conveyor belt, the first flexible conveyor belt is located above the first lower mold and the second flexible conveyor belt is located above the second lower mold, the first flexible conveyor belt is used to carry and transport the first glass substrate, and the second flexible conveyor belt is used to carry and transport the second glass substrate.

[0013] The present invention is further configured such that: the length direction of the two sides of the first forming surface with a greater degree of curvature on the horizontal plane is consistent with the conveying direction of the first flexible conveyor belt, and the length direction of the two sides of the second forming surface with a greater degree of curvature on the horizontal plane is consistent with the conveying direction of the second flexible conveyor belt.

[0014] The present invention is further configured such that: the first mold further includes a first upper mold, the second mold further includes a second upper mold, both the first upper mold and the second upper mold are provided with a vacuum adsorption mechanism and a lifting mechanism, and both the first mold and the second mold are full-surface molds.

[0015] The present invention is further configured such that: the first cooling device includes a first contoured air grating, the curved surface formed by the air outlet of the first contoured air grating is adapted to the target curved surface of the first glass substrate; the second cooling device includes a second contoured air grating, the curved surface formed by the air outlet of the second contoured air grating is adapted to the target curved surface of the second glass substrate.

[0016] The present invention is further configured such that: the two sides of the curved surface with a greater degree of curvature formed by the air outlet of the first contoured air grille have the same length direction on the horizontal plane as the conveying direction of the first flexible conveyor belt, and the first contoured air grille is located at the downstream station of the first mold; the two sides of the curved surface with a greater degree of curvature formed by the air outlet of the second contoured air grille have the same length direction on the horizontal plane as the conveying direction of the second flexible conveyor belt, and the second contoured air grille is located at the downstream station of the second mold; the conveying direction of the first glass substrate from the first mold to the first contoured air grille is perpendicular to the conveying direction of the first flexible conveyor belt, and the conveying direction of the second glass substrate from the second mold to the second contoured air grille is perpendicular to the conveying direction of the second flexible conveyor belt.

[0017] The present invention is further configured to include a first conveying device and a second conveying device. The first conveying device is provided with a first annular arm for carrying the first glass substrate. The first annular arm has an upper surface adapted to the target curved surface of the first glass substrate. The first annular arm can reciprocate along the conveying direction of the first glass substrate from the first mold to the first contoured air grating. The second conveying device is provided with a second annular arm for carrying the second glass substrate. The second annular arm has an upper surface adapted to the target curved surface of the second glass substrate. The second annular arm can reciprocate along the conveying direction of the second glass substrate from the second mold to the second contoured air grating.

[0018] The present invention is further configured to include a heating device for heating the first glass substrate and the second glass substrate, the heating device being disposed at an upstream station of the first mold and the second mold, the conveying direction of the first glass substrate from the heating device to the first mold being consistent with the conveying direction of the first flexible conveyor belt, and the conveying direction of the second glass substrate from the heating device to the second mold being consistent with the conveying direction of the second flexible conveyor belt.

[0019] The present invention is further configured such that: the first sub-production line further includes a first sub-heating device for heating the first glass substrate, the first sub-heating device is disposed at an upstream station of the first mold, and the conveying direction of the first glass substrate from the first sub-heating device to the first mold is consistent with the conveying direction of the first flexible conveyor belt; the second sub-production line further includes a second sub-heating device for heating the second glass substrate, the second sub-heating device is disposed at an upstream station of the second mold, and the conveying direction of the second glass substrate from the second sub-heating device to the second mold is consistent with the conveying direction of the second flexible conveyor belt.

[0020] In summary, the beneficial effects achieved by this utility model are as follows:

[0021] (1) Two tempered glass substrates for curved vacuum glass are made by two sub-production lines respectively, and the molds for bending the glass substrates in the two sub-production lines are compatible, so that the two glass substrates are bent and tempered by the subsequent cooling device, and the shapes of the two glass substrates fit together, satisfying the requirements of the lamination process for the contour and fit of the two glass substrates.

[0022] (2) The first mold is designed such that the curvature of the first forming surface is greater than the target curvature of the curved vacuum glass, and the curvature of the second forming surface is greater than the target curvature of the curved vacuum glass. The curvature of the first forming surface is greater than the curvature of the second forming surface, thereby offsetting the curvature deformation of the first and second glass substrates generated during the cooling and tempering process after bending. This ensures that the two glass substrates can meet the requirements of the curved vacuum glass for the contour and fit of the two glass substrates after cooling and tempering, thus ensuring the smooth progress of the lamination process.

[0023] (3) Both the first mold and the second mold are full-surface molds to ensure that the two glass substrates have good surface fit and surface profile.

[0024] (4) In a continuous production line, the glass substrate can be bent quickly after being heated by the heating device, and can be cooled quickly after bending, thus ensuring that the glass substrate has good tempering properties and high strength. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the specification will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0026] Figure 1 This is a schematic diagram of the curved tempered vacuum glass in this utility model;

[0027] Figure 2 This is a schematic diagram of the composition structure of the tempered glass substrate production line for curved vacuum glass in Embodiment 1 of this utility model;

[0028] Figure 3 A is a structural schematic diagram of the first mold in the first sub-production line;

[0029] Figure 3 B is a schematic diagram of the structure of the first cooling device in the first sub-production line;

[0030] Figure 3 C is a schematic diagram of the structure of the first ring arm in the first sub-production line;

[0031] Figure 3 D is a schematic diagram of the structure of the second mold in the second sub-production line;

[0032] Figure 3 E is a schematic diagram of the second cooling device in the second sub-production line;

[0033] Figure 3 F is a schematic diagram of the structure of the second ring arm in the second sub-production line;

[0034] Figure 4 A is a front view of the cooling device in the first sub-production line;

[0035] Figure 4 B is a front view of the cooling device in the second sub-production line;

[0036] Figure 5 A is a schematic diagram of the ring arm in the first sub-production line;

[0037] Figure 5 B is a schematic diagram of the ring arm in the second sub-production line;

[0038] Figure 6 A schematic diagram showing the degree of curvature of the first molding surface, the second molding surface, and the target curved surface of the glass substrate;

[0039] Figure 7 This is a schematic diagram of the composition structure of the tempered glass substrate production line for curved vacuum glass in Embodiment 2 of this utility model;

[0040] Figure 8 This is a schematic diagram of the composition structure of the tempered glass substrate production line for curved vacuum glass in Embodiment 3 of this utility model;

[0041] Figure 9 This is a schematic diagram of the composition structure of the tempered glass substrate production line for curved vacuum glass in Embodiment 4 of this utility model.

[0042] In the diagram: 1. First sub-production line; 11. First mold; 111. First upper mold; 112. First lower mold; 1121. First forming surface; 12. First cooling device; 13. First ring arm; 14. First flexible conveyor belt; 2. Second sub-production line; 21. Second mold; 211. Second upper mold; 212. Second lower mold; 2121. Second forming surface; 22. Second cooling device; 23. Second ring arm; 24. Second flexible conveyor belt; 3. Heating device; 31. First sub-heating device; 32. Second sub-heating device; 4. First glass substrate; 5. Second glass substrate; 6. Metal sealing material; 7. Target curved surface of curved vacuum glass. Detailed Implementation

[0043] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. For ease of explanation, the terms "vertical", "horizontal", "left", "right", "upper", "lower", "inner", "outer", "bottom", etc., used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0044] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0045] Example 1

[0046] As attached Figure 1 As shown, the curved tempered vacuum glass includes a first glass substrate 4 and a second glass substrate 5. Metal sealing material 6 is provided on the four edges of the first glass substrate 4 and the second glass substrate 5. The two glass substrates are sealed together by the metal sealing material 6 to form a curved vacuum glass with a vacuum layer. A support is also provided in the vacuum layer of the curved vacuum glass.

[0047] As attached Figures 2-5 As shown, a production line for tempered glass substrates for curved vacuum glass includes a heating device 3, a first sub-production line 1, and a second sub-production line 2. The first sub-production line 1 is used for bending and tempering a first glass substrate 4, and the second sub-production line 2 is used for bending and tempering a second glass substrate 5.

[0048] The first sub-production line 1 includes a first mold 11 and a first cooling device 12.

[0049] The heating device 3 is located upstream of the first mold 11 and the second mold 21. The heating device 3 can employ a commonly used radiant heating furnace or a convection heating furnace to heat the glass substrate. The first glass substrate 4, after being heated by the heating device 3, is conveyed toward the first mold 11, and the second glass substrate 5, after being heated by the heating device 3, is conveyed toward the second mold 21. In this embodiment, the conveying direction of the glass substrates from the heating device 3 to the first mold 11 and the second mold 21 is denoted as the Y direction.

[0050] The first mold 11 includes a first upper mold 111 and a first lower mold 112. The first glass substrate 4 is bent and shaped under the combined extrusion of the first upper mold 111 and the first lower mold 112. The upper surface of the first lower mold 112 is a downwardly recessed first forming surface 1121, and the lower surface of the first upper mold 111 is a forming surface that matches the first forming surface 1121. The matching of the forming surface of the first upper mold 111 and the first forming surface 1121 means that their bending directions and bending degrees are the same.

[0051] Specifically, as shown in the appendix Figure 6 As shown, the curvature of the first forming surface 1121 is greater than that of the target curved surface 7 of the curved vacuum glass. Visually, this means the first forming surface 1121 has a greater arch height than the target curved surface 7 of the curved vacuum glass. During the research process, the applicant discovered that the curved surface of the first glass substrate 4 after being bent by the first mold 11 will be consistent with the first forming surface 1121. However, after cooling by the first cooling device 12, the middle part of the first glass substrate 4 will spring back upwards and the edges will spring back downwards. The first glass substrate 4 as a whole has a deformation that springs back towards the direction of the flat glass substrate. Therefore, making the curvature of the first forming surface 1121 greater than that of the target curved surface 7 of the curved vacuum glass allows the first glass substrate 4 to reach or more closely approximate the target curved surface 7 of the curved vacuum glass after springing back. This results in the first glass substrate 4 having better contours after cooling and tempering, ensuring smooth subsequent lamination processes.

[0052] The first mold 11 is a full-surface mold, meaning that both the first upper mold 111 and the first lower mold 112 are full-surface molds. A full-surface mold is a mold that can completely form the entire outer surface of the product. The fact that both the first upper mold 111 and the first lower mold 112 are full-surface molds ensures the bending and forming accuracy of the first glass substrate 4 and guarantees the curvature of the first glass substrate 4.

[0053] The first sub-production line 1 also includes a first flexible conveyor belt 14, which is located above the first lower mold 112 and is a high-temperature resistant flexible conveyor belt. The first flexible conveyor belt 14 is used to carry and transport the first glass substrate 4 heated by the heating device 3 along the Y direction. Furthermore, the first flexible conveyor belt 14 can serve as a pad for the first lower mold 112 when the first glass substrate 4 is bent and formed.

[0054] The high-temperature resistant first flexible conveyor belt 14 is made of stainless steel fiber, glass fiber, Teflon, aramid, or PBO fiber. Alternatively, the first flexible conveyor belt 14 is a flexible conveyor belt coated with Teflon or high-temperature resistant resin. The use of the flexible conveyor belt solves the problem of glass transportation. During the process of transporting the first glass substrate 4 from the heating device 3 to the first mold 11, continuous transportation and forming can be achieved through the flexible conveyor belt, which improves transportation efficiency, reduces transportation time, reduces the influence of the environment on glass temperature, and thus improves the quality of glass bending and tempering.

[0055] Both the lower die 112 and the upper die 111 are preferably made of metal, thus having a longer service life. The forming surface of the upper die 111 is also covered with a high-temperature resistant flexible cloth, which is made of stainless steel fiber, glass fiber, Teflon, aramid, or PBO fiber. Alternatively, the flexible high-temperature resistant cloth is a flexible cloth coated with Teflon or high-temperature resistant resin. During the process of the upper die 111 and the lower die 112 extruding and bending the first glass substrate 4, the flexible cloth and the first flexible conveyor belt 14 prevent direct contact between the first glass substrate 4 and the metal surfaces of the upper die 111 and the lower die 112, reducing damage to the surface of the first glass substrate 4, especially to the metal sealing material 6 on the surface of the first glass substrate 4. At the same time, it prevents the first glass substrate 4 from dissipating heat too quickly, which would affect the effect of the subsequent cooling and tempering.

[0056] The first upper mold 111 is also equipped with a vacuum adsorption mechanism and a lifting mechanism, both of which are common structures in the prior art.

[0057] The vacuum adsorption mechanism includes a vacuum pipeline and a vacuum pumping component. The vacuum pipeline is located inside the first upper mold 111, and the vacuum pipeline has a vacuum port on the forming surface of the first upper mold 111. The vacuum pipeline is connected to the vacuum pumping component. After the first glass substrate 4 is bent and formed, the vacuum pumping component operates, causing the first glass substrate 4 to be adsorbed below the forming surface of the first upper mold 111. This makes the first glass substrate 4 fit more closely to the first upper mold 111, thus improving the forming accuracy of the first glass substrate 4. On the other hand, it can cooperate with the lifting mechanism to facilitate the transfer of the first glass substrate 4.

[0058] The lifting mechanism can be a commonly used lifting mechanism such as a pneumatic cylinder telescopic rod, an electric lead screw, or a hydraulic telescopic rod; the specific structure will not be described in detail. The lifting mechanism can drive the first upper mold 111 to move up and down, thereby moving it closer to or away from the first lower mold 112. The lifting mechanism allows the first upper mold 111 to move downward to press the first glass substrate 4 to form it, and after forming, the lifting mechanism can carry the first glass substrate 4 upward, away from the first lower mold 112, facilitating the next step of transfer.

[0059] Preferably, both the first upper mold 111 and the first lower mold 112 are provided with heating mechanisms, which can be common heating mechanisms such as electric heating wires. The heating mechanisms can heat the first upper mold 111 and the first lower mold 112, keeping them at a high temperature during the process of the first upper mold 111 and the first lower mold 112 extruding and bending the first glass substrate 4, and during the process of the first upper mold 111 adsorbing the first glass substrate 4, thus preventing the first glass substrate 4 from cooling too quickly and affecting the tempering effect of the first glass substrate 4.

[0060] The two sides of the first molding surface 1121 with greater curvature have their length directions on the horizontal plane aligned with the Y direction. Taking a rectangular glass substrate as an example, when the first glass substrate 4 is unidirectionally curved, that is, two opposite straight edges of the first glass substrate 4 are curved, while the other two straight edges are not curved. In this case, the two curved edges are the two edges with greater curvature. At this time, the length direction on the horizontal plane of the two curved edges is aligned with the Y direction, while the direction of the two uncurved straight edges is perpendicular to the Y direction. When the first glass substrate 4 is bidirectionally curved, that is, all four sides of the first glass substrate 4 are curved, but two opposite edges are curved to a greater degree and have a higher arch height, while the other two edges are curved to a lesser degree and have a lower arch height. In this case, the length direction on the horizontal plane of the two edges with greater curvature is aligned with the Y direction, while the length direction on the horizontal plane of the two edges with less curvature is perpendicular to the Y direction. Because the first flexible conveyor belt 14 has better flexibility in the conveying direction, i.e. the Y direction, the direction in which the first forming surface 1121 has a larger degree of curvature is consistent with the Y direction, it can ensure that the first flexible conveyor belt 14 is less damaged during the process of continuous bending and repeated deformation, thereby improving the service life of the first flexible conveyor belt 14.

[0061] The first cooling device 12 is located downstream of the first mold 11. In this embodiment, the first cooling device 12 is preferably a first contoured air grille. Let the direction perpendicular to the Y direction in the horizontal plane be denoted as the X direction. The first contoured air grille is then positioned downstream of the first mold 11 in the X direction.

[0062] The curved surface formed by the air outlets of the first contoured air grille is adapted to the target curved surface of the first glass substrate 4. The first contoured air grille includes a first upper contoured air grille and a first lower contoured air grille. The first upper contoured air grille includes multiple upper air outlets, and the curved surface formed by the multiple upper air outlets is adapted to the upper surface of the first glass substrate 4, so that the distance between all the upper air outlets on the first upper contoured air grille and the upper surface of the first glass substrate 4 is consistent, thereby making the airflow on the upper surface of the first glass substrate 4 more uniform. The first lower contoured air grille includes multiple lower air outlets, and the curved surface formed by the multiple lower air outlets is adapted to the lower surface of the first glass substrate 4, so that the distance between all the lower air outlets on the first lower contoured air grille and the lower surface of the first glass substrate 4 is consistent, thereby making the airflow on the lower surface of the first glass substrate 4 more uniform. Preferably, the direction of the curvature of the surface formed by the air outlet of the first contoured air grille is consistent with the Y direction, that is, the direction of the surface formed by the air outlet of the first contoured air grille is consistent with the direction of the first forming surface 1121, so as to further ensure that the cooling of the first glass substrate is more uniform.

[0063] Preferably, a vertically arranged partition is provided between the first cooling device 12 and the first mold 11 to prevent the cold air from the first cooling device 12 from blowing onto the first mold 11, causing the first glass substrate 4 to cool too quickly and affecting the bending and tempering effect of the first glass substrate 4.

[0064] The first sub-production line 1 also includes a first trolley for transporting the first glass substrate 4, and the first trolley is provided with a first annular arm 13 for carrying the first glass substrate 4.

[0065] The first annular arm 13 is a hollow annular metal arm, on which a high-temperature resistant flexible mesh is fitted. The flexible mesh is made of stainless steel fiber, glass fiber, Teflon, aramid, or PBO fiber, or alternatively, the flexible mesh is coated with Teflon or a high-temperature resistant resin. Preferably, the annular metal arm also has holes. The first annular arm 13 has an upper surface adapted to the target curved surface of the first glass substrate 4, so that the lower surface of the first glass substrate 4 fits against the upper surface of the first annular arm 13. The first trolley is also provided with a drive mechanism, which is connected to the first annular arm 13 to drive the first annular arm 13 to transport glass between the first mold 11 and the first cooling device 12 along the X direction, and to drive the first annular arm 13 to reciprocate within the first cooling device 12 along the X direction to cool the glass. The drive mechanism can be a commonly used motor screw structure or a motor shaft conveyor belt structure. The first annular arm 13 is a hollow annular metal arm, with a flexible high-temperature resistant mesh and ventilation holes provided on the metal arm to minimize the interference of the first annular arm 13 on the first glass substrate 4 during the cooling process. The flexible high-temperature resistant mesh can prevent the first glass substrate 4 from directly contacting the metal, thereby avoiding uneven cooling between the outer periphery and the middle part of the first glass substrate 4.

[0066] The working process of the first sub-production line 1 is as follows:

[0067] The first glass substrate 4, on which the metal sealing material 6 is disposed, is fed into the heating device 3 with the surface of the glass substrate containing the metal sealing material 6 facing upward. Heating causes the metal sealing material 6 to fully adhere to the first glass substrate 4 and softens the first glass substrate 4. The first glass substrate 4 is transported along the Y direction to above the first lower mold 112 via a high-temperature resistant first flexible conveyor belt 14. The first upper mold 111 is lowered by a lifting mechanism to press and bend the first glass substrate 4. The vacuum adsorption mechanism is activated to adsorb the first glass substrate 4 onto the forming surface of the first upper mold 111. The lifting mechanism drives the first upper mold 111 to move upward, thereby causing the first glass substrate 4 to leave the first lower mold 112. The drive mechanism of the first trolley drives the first ring arm 13 to move along the X direction to below the first upper mold 111. The vacuum adsorption mechanism of the first mold 11 stops, and the first glass substrate 4 falls onto the first ring arm 13 under the action of gravity. The drive mechanism of the first trolley drives the first ring arm 13 to move along the X direction into the interior of the first contour air grating, and moves back and forth along the X direction inside the first contour air grating until the first glass substrate 4 is cooled and tempered.

[0068] The second sub-production line 2 is similar to the first sub-production line 1 in terms of components and working principle. The second sub-production line 2 includes a second mold 21 and a second cooling device 22.

[0069] The second mold 21 includes a second upper mold 211 and a second lower mold 212. The second glass substrate 5 is bent and shaped under the combined extrusion of the second upper mold 211 and the second lower mold 212. The upper surface of the second lower mold 212 is an upwardly protruding second forming surface 2121, and the lower surface of the second upper mold 211 is a forming surface that matches the second forming surface 2121. The matching of the forming surface of the second upper mold 211 and the second forming surface 2121 means that their bending directions and bending degrees are the same.

[0070] The curvature of the first molding surface 1121 is adapted to the curvature of the second molding surface 2121 so that the first glass substrate 4 and the second glass substrate 5 can be smoothly laminated after bending and tempering. Those skilled in the art will understand that the curvature of the first glass substrate 4 after bending and tempering needs to be the same as or similar to the curvature of the second glass substrate 5 after bending and tempering to ensure smooth subsequent lamination of the first glass substrate 4 and the second glass substrate 5. Typically, the surface fit between the first glass substrate 4 and the second glass substrate 5 after bending and tempering needs to be within 0.5 mm to ensure smooth lamination. Therefore, according to the content of this utility model, the adaptation of the curvature of the first molding surface 1121 and the second molding surface 2121 does not mean that they are the same, but that they are similar, so that the first glass substrate 4 and the second glass substrate 5 can be smoothly laminated after bending and tempering.

[0071] Specifically, as shown in the appendix Figure 6 As shown, attached Figure 6 To clearly express the curvature of the second forming surface 2121, the upwardly convex second forming surface 2121 was flipped, making it downwardly concave. The curvature of the second forming surface 2121 is also greater than that of the target curved surface 7 of the curved vacuum glass, which is visually represented by the second forming surface 2121 having a greater arch height than the target curved surface 7 of the curved vacuum glass. During the research process, the applicant found that the curved surface of the second glass substrate 5 after being bent and formed by the second mold 21 is consistent with the second forming surface 2121, but after being cooled by the second cooling device 22, the middle part of the second glass substrate 5 will spring upward and the edge will spring downward (the description of the springback direction of the second glass substrate 5 here is based on the attached...). Figure 6 The direction of the second forming surface 2121 after flipping, that is, the second glass substrate 54 as a whole has a springback deformation towards the flat glass substrate, so that the curvature of the second forming surface 2121 is greater than the curvature of the target curved surface 7 of the curved vacuum glass, so that the second glass substrate 5 can reach or be closer to the target curved surface 7 of the curved vacuum glass after springback, thereby making the second glass substrate 5 have better contour after cooling and tempering, ensuring the smooth progress of the subsequent lamination process.

[0072] Meanwhile, during the research process, the applicant discovered that after the first glass substrate 4 and the second glass substrate 5 were bent in the first mold 11 and the second mold 21 respectively, they bent in different directions. Due to the influence of the weight of the glass substrates themselves and the metal sealing material 6 on the glass substrates, the springback amounts of the first glass substrate 4 and the second glass substrate 5 towards the planar glass substrate were different. In the next cooling process, the surface of the glass substrate with the metal sealing material 6 cooled at a lower rate than the surface without the metal sealing material 6, meaning the upper surface of the first glass substrate 4 and the second glass substrate 5 cooled less. Since the first glass substrate 4 was bent downwards, there was a springback force towards the planar glass substrate after bending, and the lower surface of the first glass substrate 4 cooled faster. The stress direction generated by the different cooling rates of the upper and lower surfaces of the first glass substrate 4 was the same as the direction of the springback force towards the planar glass substrate. The superposition of these two forces increased the deformation of the first substrate 3 in the direction of springback towards the planar glass substrate. The second glass substrate 5 is convex and bent upwards. After bending, it experiences a springback force towards the planar glass substrate. Furthermore, the lower surface of the second glass substrate 5 cools faster. The stress direction generated by the different cooling rates of the upper and lower surfaces of the second glass substrate 5 is opposite to the direction of the springback force towards the planar glass substrate. These two forces partially cancel each other out, thereby reducing the deformation of the second glass substrate 5 in the direction of springback towards the planar glass substrate. Therefore, by making the curvature of the first molding surface 1121 greater than that of the second molding surface 2121, the cooled and strengthened surfaces of the first substrate 3 and the second substrate 4 can more closely approximate the target curved surface 7 of the curved vacuum glass.

[0073] The second mold 21 is a full-surface mold, that is, the second upper mold 211 and the second lower mold 212 are both full-surface molds. The use of full-surface molds for the second upper mold 211 and the second lower mold 212 can ensure the bending and forming accuracy of the second glass substrate 5 and the curvature of the second glass substrate 5.

[0074] The second sub-production line 2 also includes a second flexible conveyor belt 24, which is located above the second lower mold 212 and is a high-temperature resistant flexible conveyor belt. The second flexible conveyor belt 24 is used to carry and transport the heated second glass substrate 5 along the Y direction. Furthermore, the second flexible conveyor belt 24 can serve as a pad for the second lower mold 212 during the bending and forming of the second glass substrate 5.

[0075] The high-temperature resistant second flexible conveyor belt 24 is made of stainless steel fiber, glass fiber, Teflon, aramid, or PBO fiber. Alternatively, the second flexible conveyor belt 24 is a flexible conveyor belt coated with Teflon or high-temperature resistant resin. The use of the flexible conveyor belt solves the problem of glass transportation. During the process of transporting the second glass substrate 5 from the heating furnace to the second mold 21, continuous transportation and forming can be achieved through the flexible conveyor belt, which improves transportation efficiency, reduces transportation time, reduces the influence of the environment on glass temperature, and thus improves the quality of glass bending and tempering.

[0076] Both the lower mold 212 and the upper mold 211 are preferably made of metal, thus having a longer service life. The forming surface of the upper mold 211 is also covered with a high-temperature resistant flexible cloth, which is made of stainless steel fiber, glass fiber, Teflon, aramid, or PBO fiber, or a flexible cloth coated with Teflon or a high-temperature resistant resin. During the process of extruding and bending the second glass substrate 5 by the upper mold 211 and the lower mold 212, the flexible cloth and the second flexible conveyor belt 24 prevent direct contact between the second glass substrate 5 and the metal surfaces of the upper mold 211 and the lower mold 212, reducing damage to the surface of the second glass substrate 5, especially to the metal sealing material 6 on the surface of the second glass substrate 5. At the same time, it prevents the second glass substrate 5 from dissipating heat too quickly, which would affect the effect of the subsequent cooling and tempering.

[0077] The second upper mold 211 is also equipped with a vacuum adsorption mechanism and a lifting mechanism, both of which are common structures in the prior art.

[0078] The vacuum adsorption mechanism includes a vacuum pipeline and a vacuum pumping component. The vacuum pipeline is located inside the second upper mold 211, and the vacuum pipeline has a vacuum port on the forming surface of the second upper mold 211. The vacuum pipeline is connected to the vacuum pumping component. After the second glass substrate 5 is bent and formed, the vacuum pumping component operates, causing the second glass substrate 5 to be adsorbed below the forming surface of the second upper mold 211. This makes the second glass substrate 5 fit more closely to the second upper mold 211, thus improving the forming accuracy of the second glass substrate 5. On the other hand, it can cooperate with the lifting mechanism to facilitate the transfer of the second glass substrate 5.

[0079] The lifting mechanism can be a commonly used lifting mechanism such as a pneumatic cylinder telescopic rod, an electric lead screw, or a hydraulic telescopic rod; the specific structure will not be described in detail. The lifting mechanism can move the second upper mold 211 up and down, thus moving it closer to or further away from the second lower mold 212. The lifting mechanism allows the second upper mold 211 to move downwards to press the second glass substrate 5 into shape, and after shaping, the lifting mechanism can move the second glass substrate 5 upwards, away from the second lower mold 212, facilitating subsequent transfer.

[0080] Preferably, both the second upper mold 211 and the second lower mold 212 are equipped with heating mechanisms, which can be common heating mechanisms such as electric heating wires. The heating mechanisms can heat the second upper mold 211 and the second lower mold 212, maintaining a high temperature during the process of the second upper mold 211 and the second lower mold 212 pressing and bending the second glass substrate 5, and during the process of the second upper mold 211 adsorbing the second glass substrate 5. This prevents the second glass substrate 5 from cooling too quickly, which would affect the tempering effect of the second glass substrate 5.

[0081] The two sides of the second molding surface 2121 with greater curvature have their length directions on the horizontal plane aligned with the Y direction. Taking a rectangular glass substrate as an example, when the second glass substrate 5 is unidirectionally curved, that is, two opposite straight edges of the second glass substrate 5 are curved, while the other two straight edges are not curved. In this case, the two curved edges are the two edges with greater curvature. At this time, the length direction on the horizontal plane of the two curved edges is aligned with the Y direction, while the direction of the two uncurved straight edges is perpendicular to the Y direction. When the second glass substrate 5 is bidirectionally curved, that is, all four sides of the second glass substrate 5 are curved, but two opposite edges are curved to a greater degree and have a higher arch height, while the other two edges are curved to a lesser degree and have a lower arch height. In this case, the length direction on the horizontal plane of the two edges with greater curvature is aligned with the Y direction, while the length direction on the horizontal plane of the two edges with less curvature is perpendicular to the Y direction. Because the second flexible conveyor belt 24 has better flexibility in the conveying direction, i.e. the Y direction, the direction in which the second forming surface 2121 has a larger degree of curvature is consistent with the Y direction, it can ensure that the second flexible conveyor belt 24 is less damaged during the process of continuous bending and repeated deformation, thereby improving the service life of the second flexible conveyor belt 24.

[0082] The second cooling device 22 is located downstream of the second mold 21. In this embodiment, the second cooling device 22 is preferably a second contour air grille. The second contour air grille is arranged downstream of the second mold 21 in the X direction.

[0083] The curved surface formed by the air outlets of the second contoured air grille is adapted to the target curved surface of the second glass substrate 5. The second contoured air grille includes a second upper contoured air grille and a second lower contoured air grille. The second upper contoured air grille includes multiple upper air outlets, and the curved surface formed by the multiple upper air outlets is adapted to the upper surface of the second glass substrate 5, so that the distance between all the upper air outlets on the second upper contoured air grille and the upper surface of the second glass substrate 5 is consistent, thereby making the airflow on the upper surface of the second glass substrate 4 more uniform. The second lower contoured air grille includes multiple lower air outlets, and the curved surface formed by the multiple lower air outlets is adapted to the lower surface of the second glass substrate 5, so that the distance between all the lower air outlets on the second lower contoured air grille and the lower surface of the second glass substrate 4 is consistent, thereby making the airflow on the lower surface of the second glass substrate 4 more uniform. Preferably, the direction of the curvature of the surface formed by the air outlet of the second contoured air grille is consistent with the Y direction, that is, the direction of the surface formed by the air outlet of the second contoured air grille is consistent with the direction of the second forming surface 2121, so as to further ensure that the cooling of the first glass substrate is more uniform.

[0084] Preferably, a vertically arranged partition is provided between the second cooling device 22 and the second mold 21 to prevent the cold air from the second cooling device 22 from blowing onto the second mold 21, causing the second glass substrate 5 to cool too quickly and affecting the bending and tempering effect of the second glass substrate 5.

[0085] The second sub-production line 2 also includes a second trolley for transporting the second glass substrate 5, and the second trolley is provided with a second annular arm 23 for carrying the second glass substrate 5.

[0086] The second annular arm 23 is a hollow annular metal arm, on which a high-temperature resistant flexible mesh is fitted. The flexible mesh is made of stainless steel fiber, glass fiber, Teflon, aramid, or PBO fiber; alternatively, the flexible mesh is coated with Teflon or a high-temperature resistant resin. Preferably, the annular metal arm also has holes. The second annular arm 23 has an upper surface adapted to the target curved surface of the second glass substrate 5, so that the lower surface of the second glass substrate 5 fits against the upper surface of the second annular arm 23. The second trolley is also provided with a drive mechanism, which is connected to the second annular arm 23 to drive the second annular arm 23 to transport glass between the second mold 21 and the second cooling device 22 along the X direction, and to drive the second annular arm 23 to reciprocate along the X direction inside the second cooling device 22 to cool the glass. The drive mechanism can be a commonly used motor screw structure or a motor shaft conveyor belt structure. The second annular arm 23 is a hollow annular metal arm with a flexible mesh and ventilation holes to minimize the interference of the second annular arm 23 on the second glass substrate 5 during the cooling process. The flexible mesh prevents the second glass substrate 5 from directly contacting the metal, thereby avoiding uneven cooling between the outer and middle parts of the second glass substrate 5.

[0087] The working process of the second sub-production line 2 is as follows:

[0088] The second glass substrate 5, on which the metal sealing material 6 is disposed, is fed into the heating device 3 with the surface of the glass substrate containing the metal sealing material 6 facing upward. Heating causes the metal sealing material 6 to fully adhere to the second glass substrate 5 and softens the second glass substrate 5. The second glass substrate 5 is transported along the Y direction to above the second lower mold 212 via a high-temperature resistant second flexible conveyor belt 24. The second upper mold 211 is lowered by a lifting mechanism to press and bend the second glass substrate 5. The vacuum adsorption mechanism is activated, adsorbing the second glass substrate 5 onto the forming surface of the second upper mold 211. The lifting mechanism drives the second upper mold 211 upward, causing the second glass substrate 5 to leave the second lower mold 212. The drive mechanism of the second trolley drives the second ring arm 23 to move along the X direction to below the second upper mold 211. The vacuum adsorption mechanism of the second mold 21 stops, and the second glass substrate 5 falls onto the second ring arm 23 under gravity. The drive mechanism of the second trolley drives the second ring arm 23 to move along the X direction into the interior of the second contour air grating, and moves back and forth along the X direction inside the second contour air grating until the second glass substrate 5 is cooled and tempered.

[0089] This embodiment employs two sub-production lines to fabricate two tempered glass substrates for curved vacuum glass. Throughout the entire fabrication process, the surface of the glass substrate containing the metal sealing material 6 does not come into contact with the glass conveyor surface, avoiding damage to the quality of the metal sealing material 6. This allows the two glass substrates of the curved vacuum glass to be smoothly bent, shaped, and tempered while ensuring the quality of the metal sealing material 6. The use of full-surface molds ensures good surface fit and contour accuracy between the two glass substrates. Flexible, high-temperature resistant conveyor belts and trolleys ensure continuous and efficient production during the glass substrate tempering process, thereby guaranteeing good tempering characteristics. A contoured air duct with a specific orientation ensures more uniform airflow during cooling of the glass substrate, guaranteeing excellent tempering quality.

[0090] Those skilled in the art will understand from the content of this embodiment that the difference between the first sub-production line 1 and the second sub-production line 2 in this embodiment lies only in the different first mold 11 and the second mold 21, and the different first contoured air grating and the second contoured air grating. During production, the first sub-production line 1 can be used to manufacture the first glass substrate 4. After the first glass substrate 4 is manufactured, the first mold 11 is replaced with the second mold 21, and the first contoured air grating is replaced with the second contoured air grating. This effectively converts the first sub-production line 1 into the second sub-production line 2, thereby continuing the production of the second glass substrate 5. This production method also uses the first sub-production line 1 and the second sub-production line 2 to produce the first glass substrate 4 and the second glass substrate 5, except that the first sub-production line 1 and the second sub-production line 2 produce the glass substrates at different times; therefore, it also falls within the scope of protection of this utility model.

[0091] Example 2

[0092] As attached Figure 7 As shown, this utility model discloses a production line for tempered glass substrates for curved vacuum glass. Unlike Embodiment 1, a uniform heating device 3 is no longer provided. Instead, a first sub-heating device 31 is provided upstream of the first mold 11 in the first sub-production line 1, and a second sub-heating device 32 is provided upstream of the second mold 21 in the second sub-production line 2. Both the first sub-heating device 31 and the second sub-heating device 32 transport the glass substrate along the Y direction.

[0093] Example 3

[0094] As attached Figure 8 As shown, this utility model discloses a tempered glass substrate production line for curved vacuum glass. Unlike Embodiment 1, the first sub-production line 1 and the second sub-production line 2 are respectively arranged on both sides of the heating device 3. When the first sub-production line 1 is used to produce the first glass substrate 4, the second sub-production line 2 can only serve as a loading device for the first glass substrate 4, without participating in the bending and cooling of the first glass substrate 4; when the second sub-production line 2 is used to produce the second glass substrate 5, the first sub-production line 1 can only serve as a loading device for the second glass substrate 5, without participating in the bending and cooling of the second glass substrate 5.

[0095] Example 4

[0096] As attached Figure 9As shown, this utility model discloses a production line for tempered glass substrates for curved vacuum glass. The difference between this embodiment and Embodiment 1 is that the first cooling device 12 and the second cooling device 22 use ordinary flat air grates instead of contoured air grates. In this embodiment, the flat air grates have no special directional restrictions, so they can be directly set downstream of the mold, ensuring that the heating device, mold, and flat air grates are all on a straight line in the Y direction. Furthermore, this embodiment no longer uses a trolley; instead, a conveyor roller track is set inside the flat air grates. The conveyor roller track connects to a high-temperature resistant flexible conveyor belt. After the glass substrate is bent and formed, it is directly conveyed by the flexible conveyor belt to the conveyor roller track of the flat air grates and cooled and tempered inside the flat air grates. This embodiment has higher conveying efficiency for the glass substrate, and the glass substrate can be cooled and tempered faster after bending and forming, resulting in higher tempering strength. However, a disadvantage of this embodiment compared to Embodiment 1 is that the plane formed by the air outlet of the flat air grates is inconsistent with the curved surface of the glass substrate, leading to uneven cooling of the glass substrate.

[0097] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the present invention. Clearly, those skilled in the art can make various alterations and modifications to the present invention without departing from its spirit and scope. Thus, if such modifications and modifications fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include such modifications and modifications.

Claims

1. A production line for tempered glass substrates for curved vacuum glass, wherein the curved vacuum glass comprises a first glass substrate (4) and a second glass substrate (5), characterized in that, The tempered glass substrate production line includes a first sub-production line (1) and a second sub-production line (2). The first sub-production line (1) includes a first mold (11) and a first cooling device (12). The first mold (11) is used to bend the first glass substrate (4), and the first cooling device (12) is used to cool the bent first glass substrate (4). The second sub-production line (2) includes a second mold (21) and a second cooling device (22). The second mold (21) is used to bend the second glass substrate (5), and the second cooling device (22) is used to cool the bent second glass substrate (5). The first mold (11) includes a first lower mold (112), on which a first molding surface (1121) is provided that is recessed downwards. When the first glass substrate (4) is bent, it fits against the first molding surface (1121). The second mold (21) includes a second lower mold (212), on which a second molding surface (2121) is provided that is raised upwards. When the second glass substrate (5) is bent, it fits against the second molding surface (2121). The degree of bending of the first molding surface (1121) is adapted to the degree of bending of the second molding surface (2121).

2. The production line for tempered glass substrates for curved vacuum glass according to claim 1, characterized in that, The curvature of the first forming surface (1121) is greater than the target curvature of the curved vacuum glass, the curvature of the second forming surface (2121) is greater than the target curvature of the curved vacuum glass, and the curvature of the first forming surface (1121) is greater than the curvature of the second forming surface (2121).

3. The production line for tempered glass substrates for curved vacuum glass according to claim 1, characterized in that, The first sub-production line (1) further includes a first flexible conveyor belt (14), and the second sub-production line (2) further includes a second flexible conveyor belt (24). The first flexible conveyor belt (14) is located above the first lower mold (112), and the second flexible conveyor belt (24) is located above the second lower mold (212). The first flexible conveyor belt (14) is used to carry and transport the first glass substrate (4), and the second flexible conveyor belt (24) is used to carry and transport the second glass substrate (5).

4. The production line for tempered glass substrates for curved vacuum glass according to claim 3, characterized in that, The length direction of the two sides of the first forming surface (1121) with a larger degree of curvature on the horizontal plane is consistent with the conveying direction of the first flexible conveyor belt (14), and the length direction of the two sides of the second forming surface (2121) with a larger degree of curvature on the horizontal plane is consistent with the conveying direction of the second flexible conveyor belt (24).

5. The production line for tempered glass substrates for curved vacuum glass according to claim 1, characterized in that, The first mold (11) further includes a first upper mold (111), and the second mold (21) further includes a second upper mold (211). Both the first upper mold (111) and the second upper mold (211) are provided with a vacuum adsorption mechanism and a lifting mechanism. Both the first mold (11) and the second mold (21) are full-surface molds.

6. The production line for tempered glass substrates for curved vacuum glass according to claim 3, characterized in that, The first cooling device (12) includes a first contoured air grating, the curved surface formed by the air outlet of the first contoured air grating is adapted to the target curved surface of the first glass substrate (4); the second cooling device (22) includes a second contoured air grating, the curved surface formed by the air outlet of the second contoured air grating is adapted to the target curved surface of the second glass substrate (5).

7. The production line for tempered glass substrates for curved vacuum glass according to claim 6, characterized in that, The length direction of the two sides of the curved surface formed by the air outlet of the first contoured air grating with a larger degree of curvature on the horizontal plane is consistent with the conveying direction of the first flexible conveyor belt (14), and the first contoured air grating is set at the downstream station of the first mold (11); the length direction of the two sides of the curved surface formed by the air outlet of the second contoured air grating with a larger degree of curvature on the horizontal plane is consistent with the conveying direction of the second flexible conveyor belt (24), and the second contoured air grating is set at the downstream station of the second mold (21); the conveying direction of the first glass substrate (4) from the first mold (11) to the first contoured air grating is perpendicular to the conveying direction of the first flexible conveyor belt (14), and the conveying direction of the second glass substrate (5) from the second mold (21) to the second contoured air grating is perpendicular to the conveying direction of the second flexible conveyor belt (24).

8. The production line for tempered glass substrates for curved vacuum glass according to claim 7, characterized in that, It also includes a first conveying device and a second conveying device. The first conveying device is provided with a first annular arm (13) for carrying the first glass substrate (4). The first annular arm (13) has an upper surface adapted to the target curved surface of the first glass substrate (4). The first annular arm (13) can reciprocate along the conveying direction of the first glass substrate (4) from the first mold (11) to the first contoured air grating. The second conveying device is provided with a second annular arm (23) for carrying the second glass substrate (5). The second annular arm (23) has an upper surface adapted to the target curved surface of the second glass substrate (5). The second annular arm (23) can reciprocate along the conveying direction of the second glass substrate (5) from the second mold (21) to the second contoured air grating.

9. The production line for tempered glass substrates for curved vacuum glass according to claim 3, characterized in that, It also includes a heating device (3) for heating the first glass substrate (4) and the second glass substrate (5), the heating device (3) being disposed at an upstream station of the first mold (11) and the second mold (21), the conveying direction of the first glass substrate (4) from the heating device (3) to the first mold (11) being consistent with the conveying direction of the first flexible conveyor belt (14), and the conveying direction of the second glass substrate (5) from the heating device (3) to the second mold (21) being consistent with the conveying direction of the second flexible conveyor belt (24).

10. The production line for tempered glass substrates for curved vacuum glass according to claim 3, characterized in that, The first sub-production line (1) further includes a first sub-heating device (31) for heating the first glass substrate (4). The first sub-heating device (31) is located at the upstream station of the first mold (11). The conveying direction of the first glass substrate (4) from the first sub-heating device (31) to the first mold (11) is consistent with the conveying direction of the first flexible conveyor belt (14). The second sub-production line (2) further includes a second sub-heating device (32) for heating the second glass substrate (5). The second sub-heating device (32) is located at the upstream station of the second mold (21). The conveying direction of the second glass substrate (5) from the second sub-heating device (32) to the second mold (21) is consistent with the conveying direction of the second flexible conveyor belt (24).

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