Production method and production device of curved tempered glass

Abstract

The invention discloses a production method and a production device of curved tempered glass. The production method comprises the following steps: heating; a forming step: arranging the plurality of conveying wheel groups for forming the tempered grid in the production process direction, and lifting the plurality of conveying wheel groups according to the preset curved surface of the glass under the lifting action of a conveying wheel lifting assembly; glass enters the forming tempered grid and is sequentially received by the conveying wheel sets, all the glass sections Ln are sequentially conveyed by the conveying wheel sets in the production process direction according to the sequence that the glass enters the forming tempered grid, the conveying wheel sets are sequentially and gradually formed in the conveying process, the glass sections are gradually changed into glass sections Sn after forming time, and forming is completed; n is 0 and a natural number; the curved surface is formed by fitting the upper surfaces of the conveying wheel sets for forming the tempered grid; and tempering. The invention discloses a curved tempered glass production device. The curved tempered glass can be gradually formed, and the production quality of the curved tempered glass is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of curved tempered glass production, and in particular to a curved tempered glass production method and production device. Background Art

[0002] Currently, the horizontal roller type three-dimensional curved tempered glass production process, such as Figure 1 、 Figure 2 As shown, glass 1 is first heated in heating furnace I to a softened or near-softened state, then fed into forming and tempering grid II for forming and tempering to obtain the product. Glass 1 is heated on a set of horizontally arranged conveyor rollers 11 within heating furnace I. Forming and tempering grid II primarily consists of several conveyor wheels 21 arranged in a formation and several air nozzles 22. The conveyor wheels 21 transport the glass 1 as it enters forming and tempering grid II and during its forming and tempering process. These conveyor wheels 21 can be adjusted to form a curved surface C that is identical to the lower surface of the three-dimensional curved tempered glass 1 product. Once the glass 1 fully enters forming and tempering grid II, it adheres to this curved surface for a certain period of time under the action of gravity or auxiliary pressure from above, completing the forming process. Air nozzles arranged on both sides of the curved surface cool the glass to complete the tempering process, resulting in the product.

[0003] See also Figure 1 , Figure 1 - (a) indicates heating of glass 1; Figure 1 - (b) shows the glass 1 entering the forming tempered grid II; Figure 1 - (b) indicates that the glass 1 reaches the predetermined position within the formed tempered grid II; Figure 1 - (d) indicates that the glass 1 is completed; Figure 1 - (e) indicates that the glass 1 begins to cool and temper until it is completed.

[0004] and Figure 2 Indicates the various states of glass during the forming process, that is, Figure 2 Before time 0, the glass is heated in heating furnace I, the time period from 0 to T1 is when the glass is taken out of the furnace, the time period from T1 to T2 is when the glass is formed, and the time period from T2 to T2+Tx is when the tempered glass is cooled after forming.

[0005] Depend on Figure 1 as well as Figure 2As shown, the glass 1, heated to a softened or nearly softened state, begins forming after fully entering the forming tempering grid II. If the glass 1 is short, for example, no longer than 5 meters, the time T1 spent in the forming tempering grid II is short, resulting in less heat loss and maintaining the necessary forming temperature, allowing for complete forming. However, if the glass 1 is long, for example, longer than 5 meters, the time T1 spent in the forming tempering grid II is long, resulting in greater heat loss, causing the glass to harden and fail to maintain the necessary forming temperature. Forming, therefore, becomes impossible or difficult, and product production becomes impossible or difficult.

[0006] Sometimes, in order to obtain a longer product, the glass 1 can be overheated to forcibly increase the heating temperature of the glass 1. The glass 1 can be barely formed. However, since the glass 1 is too soft after being overheated, it will collapse to varying degrees on the conveyor roller 11 before it leaves the heating furnace Ⅰ and enters the forming tempered grid Ⅱ through the non-planar three-dimensional curved surface. The glass 1 will have serious abnormal deformation and pitting, resulting in poor product shape and poor optical quality.

[0007] The curved surface is a non-planar, three-dimensional curved surface, and its adjusted shape remains unchanged throughout the entire production process. As the glass 1, heated to a softened or nearly softened state, enters the forming tempered grid II, the curved surface's support for the unformed, essentially flat lower surface of the glass 1 is localized, uneven, and constantly changing. The lower surface of the glass 1 is easily damaged during this process, resulting in surface defects on the product.

[0008] During the process of tempering the glass 1 after it is formed, the glass 1 and the curved surface are three-dimensional shapes that match each other. It is difficult for the glass 1 to move its position or it can only move slightly when driven by the conveying wheel 21. This will form serious point-shaped tempering spots when cooled by the cooling air from the point-shaped air outlet of the air nozzle 22.

[0009] In some production processes, the nozzles 22 are adjusted and arranged to match the shape of the glass 1 so that the nozzles 22 are at the same distance from the surface of the glass 1. However, during tempering, the glass 1 moves under the drive of the conveying wheel 21, causing the adjusted distance to change. In this way, the inconsistent distance will cause uneven stress during tempering.

[0010] Therefore, the current horizontal roller type three-dimensional curved tempered glass production process has the following problems: 1. It is impossible or difficult to produce three-dimensional curved tempered glass products with a length of longer than 5 meters; or glass products with a slightly longer length have poor shape and optical quality; 2. The surface of the three-dimensional curved tempered glass product is damaged; 3. There are serious tempered spots on the surface of three-dimensional curved tempered glass products; 4. The stress of three-dimensional curved tempered glass products is uneven. Summary of the Invention

[0011] In order to overcome at least one of the defects of the above-mentioned prior art, the present invention provides a method and a production device for curved tempered glass, which can gradually shape curved tempered glass and improve the production quality of curved tempered glass.

[0012] The technical solution adopted by the present invention to solve the problem is: A method for producing curved tempered glass, comprising: a heating step of heating the glass to a softened state; In the forming step, multiple conveying wheel groups for forming the tempered glass are arranged in the production process direction, and under the lifting action of the conveying wheel lifting assembly, the conveying wheel groups are lifted and lowered according to the predetermined curved surface of the glass, and after the multiple conveying wheel groups are lifted and lowered in the production process direction, a curved forming surface is formed; the flat glass is defined as a plurality of glass segments L continuously distributed in the production process direction. n Formation; The glass enters the forming tempered grid and is received in sequence by multiple conveying wheel groups, each glass segment L n According to the order in which the glass enters the forming tempered grid, it is sequentially conveyed by multiple conveying wheel groups in the production process direction, and gradually formed in the conveying process by multiple conveying wheel groups, and gradually becomes glass segment S after the forming time. n , complete the molding; n is 0 and a natural number; The curved surface formed by the upper surface of the conveying wheel group of the formed tempered grid is formed from the glass section L in the production process direction. n Start to enter the forming tempered grid in sequence, complete the forming and tempering, until the product S is obtained n , always supporting the glass; Tempering step: the formed glass is cooled and tempered.

[0013] A curved tempered glass production device, characterized in that it is used to implement the curved tempered glass production method, comprising the shaped tempered grid; The forming tempered glass grid is provided with a plurality of conveying wheel groups arranged in the production process direction, wherein the plurality of conveying wheel groups include a plurality of conveying wheels arranged perpendicular to the production process direction; the surfaces of the plurality of conveying wheels jointly form a curved forming surface, and the curved forming surface is used to receive the heated glass so as to gradually form the glass; a transmission assembly, the transmission assembly being used to drive the conveying wheel to rotate to convey the glass; A conveying wheel lifting assembly, the conveying wheel lifting assembly is used to drive the conveying wheel to move up and down in the height direction; A plurality of air nozzles are used to cool and temper the formed glass.

[0014] In summary, the present invention has the following technical effects: The softened glass heated in the heating furnace can be formed into a molding surface by multiple conveyor wheels distributed in the production process direction by the conveying assembly, and each group of multiple conveyor wheels can form different curved molding surfaces under the action of the conveyor wheel lifting assembly. After the glass is output from the heating furnace, the softened glass passes through multiple conveyor wheels at different positions in the production process direction and is gradually formed in sequence. During the glass output process, the glass molding action has begun, which significantly shortens the glass molding time. When the softened glass is output from the heating furnace, there is a molding surface section to shape the softened glass, that is, it can be molded without waiting for the softened glass to all move to the molding station, reducing the problem of hardening of the softened glass due to heat loss during the molding process, thereby improving the glass molding quality, and the glass molding has a good shape and high optical quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the production method of the prior art; Figure 2 A schematic diagram of the production status of each cross-section of glass along the production process direction according to the production method of the prior art; Figure 3 A schematic diagram of a state of the production method of the present invention; Figure 4 Schematic diagram of another state of the production method of the present invention; Figure 5 for Figure 3 as well as Figure 4 Schematic diagram of the production status structure of each cross-section of glass along the production process direction during the production process; Figure 6 Schematic diagram of another state of the production method of the present invention; Figure 7 for Figure 6 Schematic diagram of the production status structure of each cross-section of glass along the production process direction during the production process; Figure 8 Schematic diagram of another state of the production method of the present invention; Figure 9 for Figure 8 Schematic diagram of the production status structure of each cross-section of glass along the production process direction during the production process.

[0016] The reference numerals have the following meanings: Ⅰ, heating furnace; Ⅱ, forming tempered grid; 1, glass; 11, conveyor roller; 21, conveyor wheel; 22, air nozzle; 23, pressure wheel; 24, conveyor flexible shaft; 25, conveyor wheel lifting assembly; D, production process direction; Figure 2 、 Figure 5 、 Figure 7 as well as Figure 9In the figure, the horizontal axis represents the distribution position of each cross-sectional segment (L, S) in the longitudinal direction of the glass, with the front cross-sectional segment L0 of the glass as the zero point; the vertical axis represents the process time (T), with the front cross-sectional segment L0 of the glass entering the forming tempering grid as the zero point, Tx is the cooling time, and Ts is the time when the front cross-sectional segment L0 of the glass is deformed to S0; the shaded area AH represents heating, the shaded area AF represents forming, and the shaded area AC represents tempering. DETAILED DESCRIPTION

[0017] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0018] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0020] Example 1, See Figure 3-Figure 9 The present invention discloses a method for producing curved tempered glass, comprising a heating step of heating glass 1 to a softened state. Glass 1 can be heated to a softened state or a state close to a softened state in a heating furnace I.

[0021] In the forming step, multiple conveyor wheel assemblies for forming the tempered grating II are arranged in the production process direction D. Under the lifting action of the conveyor wheel lifting assembly 25, the multiple conveyor wheel assemblies are lifted and lowered according to the predetermined gradual curved surface of the glass 1. After the multiple conveyor wheel assemblies are lifted and lowered in the production process direction D, they cooperate to form a gradually curved forming surface; Define the flat state of glass 1 before forming as L, the formed state of glass 1 after forming as S, and define a whole piece of flat glass as having multiple glass segments L distributed in sequence in the production process direction. n , that is, the cross-section of the glass 1 in the plane state along the thickness direction of the glass 1 itself (also known as the glass section) is L n ; Glass 1 enters the tempered grid II and is received in sequence by multiple conveyor wheels, each cross-section L nAccording to the order in which the glass 1 enters the forming tempered grid II, it is sequentially conveyed by multiple conveying wheel groups in the production process direction D, and is gradually formed in the conveying process by multiple conveying wheel groups, and gradually becomes a glass segment S after a forming time. n , complete the molding; n is 0 and a natural number; The curved surface formed by the upper surface of the conveying wheel group of the formed tempered grid II is formed from the front glass section L of the glass 1 in the production process direction D n Start to enter the molding tempered grid II, complete molding and tempering, until the product S is obtained n , always supporting glass 1; In the tempering step, the formed glass 1 is cooled and tempered.

[0022] Specifically, in the forming step, the forming tempered grid II includes a conveying assembly, a transmission assembly, and a conveying wheel lifting assembly 25. Specifically, the conveying assembly includes a plurality of conveying wheels 21, and the plurality of conveying wheels 21 are arranged in a formation on the forming tempered grid II in the production process direction D (the same as the length direction of the glass 1 in this embodiment) and perpendicular to the production process direction (the width direction of the glass 1 in this embodiment), and the conveying wheels 21 can be directly rotated under the action of the transmission assembly, and the glass 1 is conveyed during the rotation of the plurality of conveying wheels 21.

[0023] The softened or nearly softened glass 1 heated in the heating furnace I can be received by the multiple conveying wheels 21 of the forming tempered grid II. The surfaces of the multiple conveying wheels 21 can jointly form a forming surface that matches the shape of the glass 1 to be formed.

[0024] The conveyor wheel lifting assembly 25 can drive the conveyor wheels 21 to move upward and downward, and the heights of the conveyor wheels 21 can be varied. For example, the height of a corresponding group of conveyor wheels 21 in the width direction of the glass 1 can gradually increase from the center to the sides. For example, the height of a corresponding group of conveyor wheels 21 in the width direction of the glass 1 can be gradually reduced from the center to the sides by conveyor wheels 21 at different positions. For another example, the height of a corresponding group of conveyor wheels 21 in the width direction of the glass 1 can gradually increase or decrease from one side to the other, while the heights formed by each group of conveyor wheels 21 in the length direction of the glass 1 can be the same or different. In this way, different molding surfaces can be formed according to the actual molding shape of the glass 1.

[0025] During molding, since the multiple conveying wheels of the transmission assembly can be controlled by the conveying wheel lifting assembly, they can be raised and lowered according to the specifications of the glass molding curved surface of the control system. The heights in the production process direction D (the length direction of the glass) can be inconsistent, and the heights of the conveying wheels perpendicular to the production process direction (the width direction of the glass) can also be inconsistent. For example, after the multiple conveying wheels perpendicular to the production process direction are raised and lowered by the conveying wheel lifting assembly, a molding surface segment is formed in the production process direction. A plurality of conveying wheels arranged perpendicular to the production process direction are formed into a group of conveying wheel groups, and a plurality of conveying wheel groups are arranged in the production process direction. The lifting heights of the plurality of conveying wheel groups in the glass production process direction can be different. In this way, the multiple molding surface segments arranged in the glass production process direction are fitted together to form a curved molding surface. In the continuous L n During the moving process, the forming surface segments continuously distributed on the curved forming surface can be gradually formed in sequence.

[0026] The transmission assembly in this embodiment can be driven to rotate directly by a motor, or can be driven to rotate indirectly by the motor in conjunction with a transmission mechanism, a speed reduction mechanism, etc.

[0027] Specifically, during the forming process, glass 1 is first heated in heating furnace I until it is softened or nearly softened (in this embodiment, the nearly softened state refers to the state in which the glass 1 is heated to the point where it can deform under its own weight or under external pressure). Multiple conveyor rollers are arranged in the direction of the production process within heating furnace I. As the glass 1 is heated, it is supported and heated by the multiple conveyor rollers. After heating is complete, the glass 1 is transported via the multiple conveyor rollers to the forming and tempering grid II, where it is formed and tempered to produce the curved glass 1 product. Specifically, during molding, the softened or nearly softened glass 1 can be molded on the curved molding surface under the action of gravity or auxiliary pressure from above; the air nozzles 22 arranged on both sides of the curved surface blow air to cool the glass 1 to complete the tempering.

[0028] The glass 1 in a plane state before being formed is L, the glass 1 in a formed state after being formed is S, and the cross section of the glass 1 in a plane state along the thickness direction of the glass 1 itself is L n (i.e. the aforementioned glass segments), which are arranged in the reverse direction of the production process as L0, L1, L2, ..., L n-1 、L n 、L n+1 、……、L N-2 、L N-1 、L N ; And on the curved tempered glass 1, there is a corresponding cross-section S along the thickness direction of the glass 1 itself in the process direction i , arranged in reverse process direction as S0, S1, S2, ..., Sn-1 、S n 、S n+1 ,……,S N-2 、S N-1 、S N ;L n With S n One-to-one correspondence; where N and n are 0 and natural numbers, and 0≤n≤N.

[0029] See also Figure 2 as well as Figure 5 , in the figure, the forming time T is defined F It is the necessary time for a part of glass 1 to gradually harden after it comes out of heating furnace I and dissipates heat until it can still be formed; the starting cooling time T is defined as Q It is the time from the time when a part of glass 1 comes out of heating furnace I, undergoes forming and continuous heat dissipation, to the time when it must start cooling, otherwise the tempering will not be completed; the cooling time is defined as T C It is the time necessary for the local tempering of glass 1 to be completed; T F 、T C 、T Q are all process parameters that can be set, and T F ≤T Q .

[0030] See also Figure 2 In the production and molding device of the prior art, the time period 0-T1 is the process of glass 1 being taken out of the furnace. During this process, the unheated part of the glass 1 is continuously heated, and the heat is continuously dissipated from the already heated part. After the glass 1 is completely taken out of the furnace, molding begins at time T1. If this T1 is exceeded, F During this period, if the forming process has not yet started, there may be a situation where part of the glass 1 cannot be formed or the forming accuracy of the glass 1 is poor due to heat loss. Figure 2 It can be seen that in T1-T F Only part of the length of glass 1 has been formed, and at time T2, the entire length of glass 1 is formed. That is, when glass 1 is long, glass 1 is completely output from heating furnace I. Then, the glass 1 furnace that starts to output heating furnace I first will experience a period of time in which a large section of glass 1 exceeds T F It has not been formed yet, which will cause the entire glass 1 to be unable to be formed or the forming accuracy to be poor due to excessive heat loss.

[0031] See also Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 as well as Figure 9In the production and molding device of this embodiment, 0-T1 is the process of glass 1 being taken out of the furnace, which is also the process of glass 1 being molded. In this process, the unfired portion of glass 1 is continuously heated, and the fired portion begins to be molded. At the moment when glass 1 begins to be taken out of the furnace, that is, at any cross-section L of glass 1, n From the moment it comes out of the oven, it begins to gradually transform into section S according to its own forming steps. n The heating and forming processes are seamlessly connected with no downtime. During this process, the glass 1 is supported by multiple sets of conveyor wheels 21 arranged in the production process direction D within the forming tempering grid II, which have been raised and lowered according to the control system. As the glass 1 within the heating furnace I is gradually discharged, it is continuously conveyed and gradually formed by the multiple sets of conveyor wheels 21 in the production process direction D.

[0032] See also Figure 5 、 Figure 7 as well as Figure 9 In the time period 0-T1, the glass 1 at the rear end of the production process direction D is being heated, while the glass 1 at the front output heating furnace Ⅰ is being heated at T S At this time point, molding has begun. As can be seen from the figure, the heating period and the molding period have an overlapping period 0-T1. At the same time, molding has been completely completed at the time point T2, and S0-S n In T S - The T2 time period is continuously distributed, compared with the existing technology Figure 2 The S0-S after molding in the molding method n All are distributed at the time point T2. S The glass 1 that has been formed at this time point can also begin to be cooled and tempered.

[0033] It can be seen from this that in this embodiment, at T F The glass 1 has already begun to be shaped before the time necessary for the local part of the glass 1 to be shaped after it leaves the heating furnace I. Q The time T when the glass 1 is partially tempered after leaving the heating furnace I, undergoes forming and continuous heat dissipation, and must start to cool down, otherwise the tempering will not be completed. Q Before this time, the glass 1 has been completely formed and has started to cool, so the forming quality will not be affected by heat dissipation and hardening.

[0034] The multiple conveying wheels 21 of the forming tempering grid II can rotate independently, in groups, or all together, and are indirectly driven by several servo motors or other power sources so that their height direction can be instantly controlled. Their upper surfaces are fitted together to form a curved forming surface whose shape can be instantly changed according to control instructions. During the tempering process, when the glass 1 moves continuously along the production process direction, the air nozzles 22 distributed on both sides of the curved surface are indirectly driven by several servo motors or other power sources to instantly control their height. Each nozzle maintains the same distance from the curved surface as the shape of the curved surface changes. At the same time, each air nozzle 22 blows air to cool the glass 1 according to the control instructions to complete the tempering.

[0035] The curved surface formed by the upper surfaces of the conveying wheels 21 of the forming and tempering grid II supports the glass 1 from the front cross-section L0 of the heated and softened or nearly softened state, entering the forming and tempering grid II, completing the forming and tempering process until the product is obtained, and changes with the established process shape of the glass 1 during the forming and tempering process. The glass 1 is driven by several conveying wheels 21 and is transported continuously in the production process direction D after entering the forming and tempering grid II. During the tempering process, each nozzle 22 blows air to cool the glass 1 according to the established process to complete the tempering.

[0036] In summary, in this embodiment, the glass 1 heated to a softened or nearly softened state does not begin to be formed after completely entering the forming tempered grid II. Instead, the glass 1 begins to be formed during the process of entering the forming tempered grid II. The glass 1 is formed in sequence with the order in which the various parts of the glass 1 enter. There is no problem that the glass 1 is too long and takes a long time to enter, resulting in severe heat dissipation and being unable to be formed. In other words, there is no restriction on the length of the glass 1 to complete the forming process.

[0037] The curved surface formed by the upper surfaces of the conveyor wheels 21 of the tempering grid II supports the glass 1 from the moment the front cross-section L0 of the heated, softened, or nearly softened glass 1 enters the tempering grid II, completing its shaping and tempering process until the finished product is obtained. This surface changes with the established process shape of the glass 1 during the forming and tempering process. In other words, the curved surface formed by the upper surfaces of the conveyor wheels 21 of the tempering grid II provides comprehensive and uniform support for the lower surface of the glass 1, ensuring that the lower surface of the glass 1 is always well supported and protected from damage or defects.

[0038] Furthermore, since the glass 1 conveyed to the forming tempered grid II during the forming step is in a softened or nearly softened state, the glass 1 in the softened or nearly softened state can sag under the action of its own weight. Therefore, since the glass 1 in the softened or nearly softened state is supported by the curved forming surface formed by the multiple conveying wheels 21, the driving force for the forming of the glass 1 during the forming step can be the glass 1's own weight combined with the curved forming surface.

[0039] Alternatively, pressure is applied to the top of the glass 1, and the weight of the glass 1 itself is superimposed to form the curved surface. That is, during the shaping of the glass 1, in addition to the weight of the glass 1 itself, pressure is also applied to the top of the glass 1. Specifically, multiple pressure rollers 23, driven by multiple pressure roller lifting devices, can press on the top surface of the glass 1 to assist in shaping the glass 1. The height of the pressure rollers 23 can be adjusted instantly according to control instructions based on the requirements of the glass 1 shaping process.

[0040] The specific conveying wheel lifting assembly 25 and the pressure wheel lifting device can be selected from the linear motion output structures such as the lifting cylinder or the screw drive or the lifting oil cylinder in the prior art. The above-mentioned conveying flexible shaft 24 can be selected from the steel wire flexible shaft in the prior art, or can also be selected from the elastic steel wire.

[0041] Example 2, Furthermore, a plurality of air nozzles 22 are arranged in the above-mentioned production process direction D, and the moment when the plurality of air nozzles 22 start or stop blowing air to cool the glass 1 is controlled by a control system. The control system can select a controller installed on the machine body to control the lifting of the air nozzle 22 by the controller. The lifting of the air nozzle 22 can adopt an air nozzle lifting drive structure (such as an electric push rod, a driving cylinder, a screw transmission structure, etc.), and the controller and the air nozzle lifting drive structure are used for automatic lifting.

[0042] The control system can correspond to curved glass 1 of different specifications and preset production parameters of the curved glass 1. For example, the height of each conveying wheel group in the production process direction D is different, and the corresponding curved surface formed is different, but the air nozzle 22 above each conveying wheel group matches each conveying wheel group, and the distance H between the air nozzle 22 and the conveying wheel group needs to be kept consistent. In this way, when producing the curved glass 1, the blowing distance is consistent, and the wind pressure and wind speed on the surface of the curved glass 1 can be relatively consistent. The tempering effect of each section of the curved glass 1 is relatively consistent, and it is not easy to form wind spots.

[0043] In some embodiments, during the glass 1 tempering step, the control system controls the lifting of the nozzle 22 through the nozzle lifting assembly, so that the distance between the nozzle 22 and the corresponding curved forming surface can be controlled according to actual needs, so that the blowing cooling effect of each part of the glass is consistent, and the stress of the curved tempered glass product is uniform.

[0044] Example 3, See also Figure 4 as well as Figure 5 After the glass 1 enters the tempered grid II, it swings back and forth continuously in the production process direction D; Each cross-section L of glass 1 n According to the order of entry, it gradually becomes the cross section S nAfter forming, the air nozzles 22 start to cool the glass 1 by blowing air, and then stop blowing air after the glass 1 is tempered.

[0045] Figure 4 - (a) indicates that the glass 11 is heated; Figure 4 - (b) indicates that the front portion of the glass 11 has begun to form, while the rear portion is still being heated; Figure 4 - (c) indicates that the glass 11 has been formed and the front formed part of the glass has started to be blown; Figure 4 - (d) indicates that the glass 11 is swung back and forth and cooled by air at the same time until the tempering is completed. Example

[0046] Furthermore, after the glass 1 enters the forming tempered grid II, it reciprocates non-stop in the production process direction D; Each cross-section L of glass 1 n After gradually becoming the cross-section S n After forming, blowing air to cool the glass 1 starts at the same time and stops at the same time after the tempering is completed.

[0047] See also Figure 6 as well as Figure 7 The air nozzle 22 is set in the whole process of forming the tempered grid II, and starts blowing air to cool the tempered glass 1 after the glass 1 is formed.

[0048] Figure 6 - (a) indicates that glass 1 is being heated; Figure 6 - (b) indicates that the front of the glass 1 has begun to form, while the rear is still being heated; Figure 6 - (c) indicates that the glass 1 is formed; Figure 6 - (d) indicates that the glass 1 is cooled by blowing air until the tempering is completed.

[0049] This embodiment is simple to control. After the glass is completely formed, multiple nozzles start blowing air at the same time. This process is suitable for the forming and tempering of shorter glass.

[0050] Example 5, See also Figure 8 as well as Figure 9 After the glass 1 enters the tempered grid II, it swings back and forth continuously in the production process direction D; The multiple air nozzles 22 distributed in the production process direction D are divided into a front section A and a rear section B; The front section L of the glass 1 n After gradually becoming the cross-section S nAfter the forming is completed, the rear nozzle 22 starts blowing air to cool the front end of the glass 1 that has been formed. n After gradually becoming the cross-section S n , the front nozzle 22 starts blowing air, and together with the nozzle 22 in the rear section, blows air to cool, completing the tempering.

[0051] In this way, during the tempering step, multiple nozzles can be controlled in sections. The front end of the glass that is first output from the heating furnace and has been completed by the forming tempering grid can be tempered by the nozzles at the rear end first, without affecting the continued shaping of the rear end of the glass output later. The nozzles at the rear end start to blow air first to cool and temper it. In this way, the already formed glass can be tempered first. After all the glass has been formed, the nozzles at the front end are started and start blowing air together with the nozzles at the rear end.

[0052] Figure 8 - (a) indicates that glass 1 is being heated; Figure 8 - (b) indicates that the front of glass 1 has begun to form, and after forming, the nozzle B section starts to blow air; the rear part is still being heated; Figure 8 - (c) indicates that the glass 1 is formed; Figure 8 - (d) indicates that the glass 1 nozzle section and the nozzle section both start blowing air to cool until the tempering is completed.

[0053] When the glass is long, if the waiting time is too long, more heat will be lost, and the front end of the glass will not be tempered. Therefore, the part of the front end of the glass that comes out first needs to be tempered by air blowing first to prevent the heat loss of the part of the front end of the glass that is formed first due to the long waiting time when the glass is long, resulting in the tempering failure, thereby improving the quality of glass tempering.

[0054] Example 6, After the glass 1 enters the tempered grid II, it continues to move forward in the production process direction D; Each cross-section L of glass 1 n The forming, tempering and splicing are completed in the forming section, tempering section and splicing section of the tempered grating II respectively; The air nozzles 22 distributed in the tempering section continuously blow air, and the tempering is completed after the glass 1 passes through.

[0055] Specifically, the formed tempered grid II is sequentially divided into a forming section, a tempering section, and a connecting section along the production process direction D. The wind screen assembly is located in the tempering section. After entering the formed tempered grid II, the glass 1 moves continuously (in this embodiment, the term "non-stop" includes both reciprocating and continuous forward motion) in a unidirectional manner along the production process direction D.

[0056] See also Figure 3 as well as Figure 5 The molded tempered grid II is divided into three sections along the production process direction D: the molding section F, the tempering section C, the connecting section P, and the cross-sectional sections L of the glass 11. n The forming, tempering and splicing are completed in these three sections respectively. The air nozzle 22 is arranged in the tempering section, and blows air to cool the glass 11 when it passes through to complete the tempering.

[0057] Figure 3 - (a) indicates that the glass 11 is heated; Figure 3 - (b) indicates that the front portion of the glass 11 is tempered in the tempering section C, the middle portion is formed in the forming section F, and the rear portion is still heated in the heating furnace I; Figure 3 - (c) indicates that the front portion of the glass 11 has been tempered in the splicing section P, the middle portion has been tempered in the tempering section C, and the rear portion has been formed in the forming section F; Figure 3 -(d) indicates that the entire glass 11 is within the joint section P and has been tempered.

[0058] This embodiment is suitable for a continuous production process of glass 1 and has high production efficiency.

[0059] It should be noted that, in Examples 3 and 6, since blowing starts when the glass is formed and ends when the blowing ends, the heating time, forming time and tempering time experienced by the glass are the same, and the stress of each cross-section of the glass is the same, so the quality of glass forming is good.

[0060] Example 7, This embodiment provides a curved tempered glass production device for implementing a curved tempered glass production method, specifically comprising forming a tempered grid II; The forming tempered grid II is provided with a plurality of conveying wheel groups arranged in the production process direction D (glass length direction), and the plurality of conveying wheel groups include a plurality of conveying wheels 21 arranged perpendicular to the production process direction (glass width direction); the surfaces of the plurality of conveying wheels 21 jointly form a curved forming surface, which is used to receive the heated glass 1 so as to gradually shape the glass 1; A transmission assembly is used to drive the conveying wheel 21 to rotate to convey the glass 1; The conveying wheel lifting assembly 25 is used to drive the conveying wheel 21 to move up and down in the height direction; The plurality of air nozzles 22 are used to cool and temper the formed glass 1 .

[0061] In this embodiment, for the convenience of description, the conveying wheel groups arranged in the production process direction D (each conveying wheel group includes a plurality of conveying wheels 21 arranged perpendicular to the production process direction) are defined as C0, C1, C2, ..., Cn-1 、C n 、C n+1 ,……,C N2 、C N-1 、C N , so that when the softened glass 1 is output, the first output glass 1 is L0, L1, L2, ..., L n-1 , L n , L n+1 、……、L N-2 , L N-1 , L N Sequentially with C0, C1, C2, ..., C n-1 、C n 、C n+1 ,……,C N-2 、C N-1 、C N For example, L0 is the first glass segment output from the heating furnace I, which is formed by C0 to form S0, and L1 is output next to L0. At this time, L0 is transported to C1 by the conveying wheel 21 and further formed by C1, while L1 is formed by C0, and so on to L N There is a corresponding cross-section S on its product three-dimensional curved tempered glass 1. n , arranged in reverse process direction as S0, S1, S2, ..., S n-1 、S n 、S n+1 ,……,S N-2 、S N-1 、S N , where N is 0 and a natural number and 0≤n≤N; L0 is transformed into S0.

[0062] The forming tempering grid II is arranged with several conveying wheels 21, which can rotate independently, rotate together in groups, or rotate all together, and are indirectly driven by several servo motors or other power structures so that they can be instantly controlled in the height direction. Their upper surfaces are fitted together to form a curved forming surface whose shape can be changed instantly according to control instructions; during the tempering process, when the glass 1 moves continuously along the production process direction, the air nozzles 22 distributed on both sides of the curved surface are indirectly driven by several servo motors or other power structures to instantly control their heights. Each of them maintains the same distance from the curved surface as the shape of the curved surface changes. At the same time, each air nozzle 22 blows air to cool the glass 1 according to the control instructions to complete the tempering.

[0063] The curved surface formed by the upper surfaces of the conveying wheels 21 of the forming and tempering grid II supports the glass 1 from the front cross-section L0 of the heated and softened or nearly softened state, entering the forming and tempering grid II, completing the forming and tempering process until the product is obtained, and changes with the established process shape of the glass 1 during the forming and tempering process. The glass 1 is driven by several conveying wheels 21 and is transported continuously in the production process direction D after entering the forming and tempering grid II. During the tempering process, each nozzle 22 blows air to cool the glass 1 according to the established process to complete the tempering.

[0064] During molding, since the multiple conveying wheels of the transmission assembly can be controlled by the conveying wheel lifting assembly, they can be raised and lowered according to the specifications of the glass molding curved surface of the control system. The heights in the production process direction D (the length direction of the glass) can be inconsistent, and the heights of the conveying wheels perpendicular to the production process direction (the width direction of the glass) can also be inconsistent. For example, after the multiple conveying wheels perpendicular to the production process direction are raised and lowered by the conveying wheel lifting assembly, a molding surface segment is formed in the production process direction. A plurality of conveying wheels arranged perpendicular to the production process direction are formed into a group of conveying wheel groups, and a plurality of conveying wheel groups are arranged in the production process direction. The lifting heights of the plurality of conveying wheel groups in the glass production process direction can be different. In this way, the multiple molding surface segments arranged in the glass production process direction are fitted together to form a curved molding surface, and the continuous L n During the moving process, the forming surface segments continuously distributed on the curved forming surface can be gradually formed in sequence.

[0065] In summary, in this embodiment, the glass 1 heated to a softened or nearly softened state does not begin to be formed after completely entering the forming tempered grid II. Instead, the glass 1 begins to be formed during the process of entering the forming tempered grid II. The glass 1 is formed in sequence with the order in which the various parts of the glass 1 enter. There is no problem that the glass 1 is too long and takes a long time to enter, resulting in severe heat dissipation and being unable to be formed. In other words, there is no restriction on the length of the glass 1 to complete the forming process.

[0066] The curved surface formed by the upper surfaces of the conveyor wheels 21 of the tempering grid II supports the glass 1 from the moment the front cross-section L0 of the heated, softened, or nearly softened glass 1 enters the tempering grid II, completing its shaping and tempering process until the finished product is obtained. This surface changes with the established process shape of the glass 1 during the forming and tempering process. In other words, the curved surface formed by the upper surfaces of the conveyor wheels 21 of the tempering grid II provides comprehensive and uniform support for the lower surface of the glass 1, ensuring that the lower surface of the glass 1 is always well supported and protected from damage or defects.

[0067] As a preferred embodiment, the conveying assembly includes a plurality of conveying flexible shafts 24, and the plurality of conveying flexible shafts 24 are spaced apart in the production process direction D; the axial direction of the conveying flexible shafts 24 is perpendicular to the production process direction, and each of the conveying flexible shafts 24 is rotatably provided with a plurality of conveying wheels 21; The transmission assembly is used to drive the conveying flexible shaft 24 to rotate; the conveying wheel lifting assembly 25 is used to drive the conveying flexible shaft 24 to rise and fall in the height direction.

[0068] The transmission component also includes multiple conveying flexible shafts 24, which are spaced apart in the production process direction D, and the conveying flexible shafts 24 extend perpendicular to the production process direction. Each conveying flexible shaft 24 is provided with multiple conveying wheels 21; the transmission component can drive the conveying flexible shaft 24 to rotate, so that the rotation of the conveying flexible shaft 24 can drive the multiple conveying wheels 21 on the conveying flexible shaft 24 to rotate together, and because the conveying flexible shaft 24 has a certain flexibility, it is driven by the conveying wheel lifting component 25 to drive the conveying flexible shaft 24 to rise and fall, so that the forming surface segment formed by the multiple conveying wheels 21 on the conveying flexible shaft 24 can undergo different curved surface changes during the lifting process of the conveying flexible shaft 24.

[0069] Specifically, multiple conveying wheel lifting assemblies 25 can be set below the conveying flexible shaft 24, and multiple conveying wheel lifting assemblies 25 below the same conveying flexible shaft 24 can be lifted and lowered at different positions perpendicular to the production process direction. If only one conveying wheel lifting assembly 25 is provided, the conveying wheel lifting assembly 25 can be lifted and lowered at one position of the conveying flexible shaft 24, such as being driven at the middle position, so that the curvature change of the forming surface segment can also be achieved, but the curvature change range is small due to the single-point lifting. If two conveying wheel lifting assemblies 25 are provided, the two conveying wheel lifting assemblies 25 can be symmetrically distributed on both sides of the conveying flexible shaft 24 perpendicular to the production process direction. When the curvature of the forming surface segment is switched, both sides can be lifted and lowered synchronously, or one side can be lifted and lowered. In this way, the curvature change range is relatively large. If three or more conveying wheel lifting assemblies 25 are provided, when the conveying flexible shaft 24 is lifted and lowered, multiple conveying wheel lifting assemblies 25 can achieve multi-point lifting positions. The lifting heights of different conveying wheel lifting assemblies 25 are different, and forming surface segments with different curvatures can be fitted to form them, making the curvature change more flexible.

[0070] The specific conveying wheel lifting assembly 25 can be selected from the linear motion output structures such as the lifting cylinder or the screw drive or the lifting oil cylinder in the prior art. The above-mentioned conveying flexible shaft 24 can be selected from the steel wire flexible shaft in the prior art, or can be selected from the elastic steel wire.

[0071] It should be noted that the conveying wheel group formed by the multiple conveying wheels 21 arranged perpendicular to the production process direction can be formed by connecting the conveying flexible shaft 24; in other cases, the conveying wheel group formed by the multiple conveying wheels 21 arranged perpendicular to the production process direction can also be arranged separately, and a conveying wheel lifting assembly is provided under each conveying wheel 21, and each conveying wheel lifting assembly 25 is used to drive the corresponding conveying wheels 21 to rise and fall, so that a single conveying wheel 21 can be lifted and lowered by a single conveying wheel lifting assembly 25, and the forming surface segment formed by a single group of conveying wheel groups can be lifted and lowered at a single point by a single conveying wheel lifting assembly 25, so that the curved surface of the forming surface segment changes at a single point without any linkage.

[0072] Based on any of the above embodiments, as a preferred embodiment, multiple air nozzles 22 and multiple air nozzle lifting assemblies are distributed on both sides of the height direction of the forming surface jointly formed by the surfaces of multiple conveying wheels 21; the air nozzle lifting assemblies are used to drive the air nozzles 22 to rise and fall in the height direction.

[0073] The curved glass 1 production and forming device further includes a plurality of air nozzles 22, which are used to blow air to cool the formed glass 1 to complete the tempering of the glass 1; The nozzle lifting assembly is used to drive the nozzle 22 to move up and down in the height direction.

[0074] During the process of cooling and tempering the glass 1 after it is formed, the curved forming surface formed by the upper surface of the conveying wheel 21 of the forming tempering grid II always adapts to the shape of the glass 1. Therefore, the glass 1 can have a large or unrestricted movement under the drive of the conveying wheel 21. The cooling air from the point-shaped air outlet of the air nozzle 22 will not form serious point-shaped tempering spots under cooling, but will be evenly spread over the moving distance, thereby improving the negative effects of tempering spots.

[0075] During the tempering process, the nozzle 22 can be driven by the nozzle lifting assembly to maintain the same distance from the curved surface as the shape of the curved forming surface formed by the multiple conveying wheels 21 changes, so the consistency of the blowing cooling intensity is better, the stress of the product is more uniform, the safety is better, the wind spots are less obvious, and the optical quality is better.

[0076] The technical means disclosed in the solutions of the present invention are not limited to those disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A method for producing curved tempered glass, characterized in that: include, a heating step of heating the glass to a softened state; In the forming step, multiple conveyor wheel groups for forming the tempered grating are arranged in the production process direction, and under the lifting action of the conveyor wheel lifting assembly, the multiple conveyor wheel groups are lifted and lowered according to the predetermined curved surface of the glass, and the multiple conveyor wheel groups are lifted and lowered in the production process direction to form a curved forming surface; Definition: Flat glass consists of a plurality of glass segments L distributed continuously in the production process direction. n Formation; The glass enters the forming tempered grid and is received in sequence by multiple conveying wheel groups, each glass segment L n According to the order in which the glass enters the forming tempered grid, it is sequentially conveyed by multiple conveying wheel groups in the production process direction, and gradually formed in the conveying process by multiple conveying wheel groups, and gradually becomes glass segment S after the forming time. n , complete the molding; n is 0 and a natural number; The curved surface formed by the upper surface of the conveying wheel group of the formed tempered grid is formed from the front glass section L in the production process direction of the glass n Start to enter the forming tempered grid in sequence, complete the forming and tempering, until the product S is obtained n , always supporting the glass; Tempering step: the formed glass is cooled and tempered.

2. The method for producing curved tempered glass according to claim 1, wherein: In the forming step, the driving force for glass forming is the gravity of the glass itself combined with the curved forming surface.

3. The method for producing curved tempered glass according to claim 1, wherein: In the forming step, pressure is applied on the top of the glass, and the gravity of the glass itself is superimposed to form the curved forming surface.

4. The method for producing curved tempered glass according to any one of claims 1 to 3, characterized in that: A plurality of air nozzles are arranged in the production process direction, and the timing of starting or stopping the air blowing to cool the glass is controlled by a control system; In the glass tempering step, the control system controls the lifting and lowering of the tuyere through the tuyere lifting assembly.

5. The method for producing curved tempered glass according to claim 4, wherein: After the glass enters the tempered grid, it swings back and forth continuously in the direction of the production process; Each glass segment L n According to the order of entry, it gradually becomes glass section S n After forming, the air nozzles start to blow air to cool the glass and then stop blowing air until the glass is tempered as a whole.

6. The method for producing curved tempered glass according to claim 4, wherein: After the glass enters the tempered grid, it swings back and forth continuously in the direction of the production process; Each glass segment L n After gradually becoming glass segment S n After forming, air starts blowing to cool the glass, and stops when tempering is completed.

7. The method for producing curved tempered glass according to claim 4, wherein: After the glass enters the tempered grid, it swings back and forth continuously in the direction of the production process; The multiple air nozzles distributed in the production process direction are divided into a front section and a rear section; The front glass section L n After gradually becoming glass segment S n After the forming is completed, the rear nozzle starts to blow air to cool the front end of the glass that has been formed. n After gradually becoming glass segment S n , the front nozzle starts blowing air, and together with the nozzle in the rear section, it blows air to cool down and complete the tempering.

8. The method for producing curved tempered glass according to claim 4, wherein: After the glass enters the formed tempered grid, it continues to move forward in the direction of the production process; Each glass segment L n The forming, tempering and splicing are completed in the forming section, tempering section and splicing section of the tempered grid respectively; The air nozzles distributed in the tempering section blow air continuously, and the tempering is completed after the glass passes through.

9. A curved tempered glass production device, characterized in that: Used to implement the method for producing curved tempered glass according to any one of claims 1 to 8, Including the molded tempered grid; The forming tempered glass grid is provided with a plurality of conveying wheel groups arranged in the production process direction, the conveying wheel group includes a plurality of conveying wheels arranged perpendicular to the production process direction; the surfaces of the plurality of conveying wheels together form a curved forming surface, and the curved forming surface is used to receive the heated glass so as to gradually shape the glass; a transmission assembly, the transmission assembly being used to drive the conveying wheel to rotate to convey the glass; A conveying wheel lifting assembly, the conveying wheel lifting assembly is used to drive the conveying wheel to move up and down in the height direction; A plurality of air nozzles are used to cool and temper the formed glass.

10. The curved tempered glass production device according to claim 9, characterized in that: On both sides of the height direction of the forming surface jointly formed by the surfaces of the multiple conveying wheels, there are distributed multiple air nozzles and multiple air nozzle lifting assemblies; the air nozzle lifting assemblies are used to drive the air nozzles to rise and fall in the height direction to control the lifting height of each of the conveying wheels.

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