Device and method for finely adjusting forming thickness of substrate glass by overflow method

Abstract

The invention discloses an overflow method substrate glass forming thickness fine adjusting device and method. The overflow method substrate glass forming thickness fine adjusting device comprises two heat conduction boxes arranged below an overflow brick and a cooling mechanism. The heat conduction box bodies are located on the two sides of a glass sheet respectively, and the cooling mechanisms are arranged on the heat conduction box bodies respectively. The cooling mechanism comprises a plurality of thickness air pipes and a rotating piece; the thickness air pipe is arranged on the rotating piece, an air inlet of the thickness air pipe is communicated with cooling air, and the other end of the thickness air pipe is arranged in the heat conduction box body; the rotating piece is arranged on the heat conduction box body and used for achieving rotation of the thickness air pipe. According to the application, the thickness air pipe can be adjusted, so that the thickness range and the cooling area of the glass sheet can be finely adjusted by the thickness air pipe, and the processing quality of the glass sheet can be improved.

Description

Technical Field

[0001] The present application belongs to the field of glass manufacturing technology, and in particular relates to a device and method for finely adjusting the thickness of overflow-processed substrate glass molding. Background Art

[0002] In the overflow down-draw process, controlling glass thickness is a critical step in producing high-quality glass substrates. Traditional thickness control methods rely on placing transverse cooling ducts in areas above the glass's softening point where viscosity is low. These ducts direct cool air toward the glass through highly thermally conductive boxes or baffles, creating transverse temperature gradients across the glass ribbon, perpendicular to the flow direction. These temperature gradients affect the local viscosity of the glass and, through the draw force, alter its thickness.

[0003] However, as display technology continues to evolve towards higher definition, thinner dimensions, and larger displays, the requirements for glass substrate thickness uniformity are becoming increasingly stringent, typically requiring thickness tolerances to be controlled within 10μm. Traditional fixed-position air ducts, due to their limited adjustment range and restricted cooling area, struggle to meet this high-precision requirement. Especially when air ducts are spaced far apart, the glass sheet thickness adjustment between the two ducts is ineffective, resulting in out-of-tolerance thickness across the entire panel. Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide an overflow method substrate glass forming fine thickness adjustment device and method thereof to solve the problem mentioned in the background art above that the fixed position of the air duct limits the adjustment range of the glass sheet thickness and the cooling area, making it difficult to achieve fine adjustment of the glass sheet.

[0005] To achieve the above objectives, this application adopts the following technical solutions: In a first aspect, a device for finely adjusting the thickness of glass substrates formed by an overflow method is provided, the device comprising two heat-conducting boxes and a cooling mechanism arranged below an overflow brick; The heat-conducting boxes are respectively located on both sides of the glass sheet, and the cooling mechanisms are respectively arranged on the heat-conducting boxes; The cooling mechanism includes a plurality of thick air ducts and a rotating member; The thickness air duct is arranged on the rotating member, the air inlet of the thickness air duct is connected to the cooling air, and the other end is arranged inside the heat conduction box; The rotating member is arranged on the heat-conducting box body and is used to realize the rotation of the thickness air duct.

[0006] In combination with the first aspect, in a possible implementation, the rotating member is configured as a universal joint.

[0007] In combination with the first aspect, in a possible implementation, the universal joint is detachably connected to the heat conducting box.

[0008] In combination with the first aspect, in a possible implementation, the universal joint is made of a high-temperature resistant material.

[0009] With reference to the first aspect, in a possible implementation, the rotation angle of the universal joint is 0-360°.

[0010] In combination with the first aspect, in a possible implementation, the heat conduction box is provided with an inclined surface, and the inclined surface is arranged parallel to the inclined surface of the overflow brick.

[0011] In combination with the first aspect, in a possible implementation, the device further includes a control system, the control system including a thickness detection sensor, a controller, and an actuator; The thickness detection sensors are distributed on the glass sheet production line and are used to monitor the thickness data of the glass sheet in real time; The controller receives data from the thickness detection sensor and issues control instructions to the actuator according to a preset thickness control algorithm; The actuator accurately controls the rotation angle and cooling air volume of the air ducts of each thickness according to the instructions of the controller, so as to adjust the thickness of the glass sheet.

[0012] In a second aspect, a method for finely adjusting the thickness of a glass substrate formed by an overflow method is provided, the method comprising: When a low thickness point is detected on the glass sheet, the thickness air duct is rotated to correspond to the low thickness point; When the deviation of the thickness low point exceeds a preset threshold, the thickness of the low point is compensated by increasing the adjustment angle of the thickness air duct facing the overflow slope; When there is a deviation between the thickness of the air duct and the position of the lowest thickness point in the lateral direction, the lateral angle of the lowest thickness point is adjusted by rotating the adjacent air ducts to achieve precise adjustment of the thickness at the corresponding position.

[0013] In combination with the second aspect, in one possible implementation, the method adopts a combined adjustment method in the actual adjustment process, that is, according to the thickness deviation and distribution on the glass sheet, the lateral position and height of the air duct are adjusted at the same time to achieve more comprehensive and refined thickness control.

[0014] In combination with the second aspect, in one possible implementation, when a glass sheet has a high point in thickness, the same principle can be used, but the method of outputting hot air through the thickness duct can be adjusted to achieve the corresponding adjustment effect of the high point in thickness of the glass sheet.

[0015] Compared with the prior art, this application has the following beneficial effects: The present application provides a device for finely adjusting the thickness of overflow-processed substrate glass molding. By arranging a cooling mechanism comprising a plurality of thickness ducts and a rotating member under the overflow brick, and the thickness duct is arranged on the rotating member, the direction of the cooling air can be flexibly adjusted. Traditional thickness ducts are often fixed and can only produce a cooling effect on a specific area. The rotating member in the present device allows the thickness duct to rotate, so that the cooling air can change direction as needed, and can more accurately adjust the cooling of different positions of the glass sheet. This greatly improves the flexibility of adjusting the thickness of the glass sheet, avoids the difficulty of local adjustment caused by the fixed position of the cooling air, and can accurately guide the cooling air to the area on the glass sheet where the thickness needs to be adjusted, thereby achieving more refined thickness control.

[0016] In one possible implementation, a universal joint is used as a rotating part, which greatly improves the rotational flexibility of the thickness duct. Compared with a simple rotating part, the universal joint can achieve multi-dimensional rotation, making the angle adjustment of the thickness duct in three-dimensional space more free, thereby being able to more accurately direct the cooling air to the area of ​​the glass sheet that needs to be adjusted, enhancing the controllability of the glass sheet thickness adjustment, and providing a better mechanical structure foundation for achieving fine-grained adjustment.

[0017] In one possible implementation, the 360-degree rotation angle range allows the thickness duct to cover the entire circumference, enabling all-round cooling air adjustment at different positions of the glass sheet, greatly expanding the range of the cooling air. No matter where the thickness deviation occurs on the glass sheet, the thickness duct can be aligned with that area by adjusting the universal joint angle, thereby improving the flexibility and comprehensiveness of the glass sheet thickness adjustment and helping to achieve more precise thickness control.

[0018] In one possible implementation, the control system automates and intelligently adjusts glass sheet thickness. By monitoring glass sheet thickness in real time and automatically adjusting the thickness duct's rotation angle and cooling air volume based on a precise control algorithm, the system can quickly and accurately adjust glass sheet thickness, reducing manual intervention and improving adjustment accuracy and efficiency. This also avoids errors that can arise from manual operation, improving product quality consistency and stability, and reducing labor costs and operational risks.

[0019] This application provides a method for finely adjusting the thickness of overflow-processed substrate glass. Based on the varying thickness deviations present on the glass sheet, the thickness duct is rotated and adjusted to precisely compensate for the lowest thickness point. By aligning the thickness duct with the lowest thickness point and adjusting the angle, the problem of uneven thickness of the glass sheet can be effectively addressed, improving the quality and pass rate of the glass sheet, reducing the scrap rate due to thickness deviations, and increasing production efficiency and economic benefits.

[0020] In one possible implementation, a combined adjustment method can more comprehensively handle complex thickness deviation situations, overcome the limitations of single-direction adjustment, achieve refined control of glass sheet thickness, improve adjustment flexibility and accuracy, and better meet the strict requirements of high-precision, thin, and large-scale substrate glass production for thickness uniformity, improve the overall quality and performance of the product, and reduce the impact of thickness deviation on product quality.

[0021] In one possible implementation, not only can the low points of thickness be adjusted, but the high points of thickness can also be effectively handled. By outputting hot air through the thickness duct, two-way control of the thickness adjustment of the glass sheet is achieved, the adjustment range and capacity of the thickness duct are expanded, the means of adjusting the thickness of the glass sheet are further improved, and the control ability of the glass sheet thickness in the entire production process is improved, thereby ensuring the thickness uniformity of the product and improving the quality and pass rate of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a front view of a device for finely adjusting the thickness of glass substrate formed by an overflow method provided in this application; Figure 2 for Figure 1 Magnified image of; Figure 3 This is a schematic diagram of a method for finely adjusting the thickness of overflow-based substrate glass molding provided in this application.

[0023] Reference numerals in the figure: 1. overflow brick; 2. heat-conducting box; 3. cooling mechanism; 4. thickness air duct; 5. rotating part; 6. glass sheet. DETAILED DESCRIPTION

[0024] The specific implementation of this application is further described in detail below with reference to the accompanying drawings.

[0025] like Figure 1 and Figure 2 As shown, the present application provides a device for finely adjusting the thickness of overflow-processed substrate glass molding, which may include two heat-conducting boxes 2 and a cooling mechanism 3 arranged below the overflow brick 1.

[0026] The heat-conducting box body 2 is located on both sides of the glass sheet 6 , and the cooling mechanism 3 is disposed on the heat-conducting box body 2 .

[0027] The heat-conducting box 2 can be made of a ceramic material with high temperature resistance and high thermal conductivity, such as silicon carbide. According to the size and installation position of the overflow brick 1 and the glass sheet 6, the two heat-conducting boxes 2 are respectively installed on both sides of the glass sheet 6 below the overflow brick 1.

[0028] The cooling mechanism 3 may include a plurality of thick air ducts 4 and a rotating member 5 .

[0029] The thickness air duct 4 is arranged on the rotating member 5 , an air inlet of the thickness air duct 4 is connected to the cooling air, and the other end is arranged inside the heat conduction box 2 .

[0030] The thick air duct 4 can be made of high-temperature resistant material and made into a suitable diameter and length. Its air inlet is connected to the external cooling air supply system through a pipeline to ensure that the cooling air can be supplied continuously and stably.

[0031] The rotating member 5 can be a simple sleeve structure, which is installed on the heat conduction box 2. The thickness air duct 4 is installed on the rotating member 5 so that one end of it can rotate freely inside the heat conduction box 2 and the other end receives cooling air.

[0032] In an embodiment of the present application, a cooling mechanism 3 comprising a plurality of thickness ducts 4 and a rotating member 5 is provided below the overflow brick 1, and the thickness ducts 4 are provided on the rotating member 5, so that the direction of the cooling air can be flexibly adjusted. Conventional thickness ducts 4 are often fixed and can only produce a cooling effect on a specific area, while the rotating member 5 in the present device allows the thickness duct 4 to rotate, so that the cooling air can change direction as needed, and can more accurately adjust the cooling of different positions of the glass sheet 6. This greatly improves the flexibility of adjusting the thickness of the glass sheet 6, avoids the difficulty of local adjustment caused by the fixed position of the cooling air, and thus can accurately guide the cooling air to the area on the glass sheet 6 where the thickness needs to be adjusted, thereby achieving more refined thickness control.

[0033] In a possible embodiment, the rotating member 5 may be configured as a universal joint.

[0034] The universal joint can be a commercially available industrial joint, with dimensions matching those of the thickness air duct 4 and the heat transfer housing 2. The universal joint is mounted on the heat transfer housing 2 to ensure that the thickness air duct 4 is securely mounted on the universal joint and allows for flexible rotation. For example, one end of the universal joint is bolted to a mounting hole in the heat transfer housing 2, and the thickness air duct 4 is connected to the other end of the universal joint via a flange, clamp, or other connection method, allowing the thickness air duct 4 to rotate in various directions.

[0035] In the embodiment of the present application, a universal joint is used as the rotating part 5, which greatly improves the rotation flexibility of the thickness duct 4. Compared with a simple rotating part 5, the universal joint can realize multi-dimensional rotation, so that the angle adjustment of the thickness duct 4 in three-dimensional space is freer, thereby being able to more accurately guide the cooling air to the area of ​​the glass sheet 6 that needs to be adjusted, thereby enhancing the controllability of the thickness adjustment of the glass sheet 6 and providing a better mechanical structure foundation for achieving refined adjustment.

[0036] In a possible embodiment, the universal joint is detachably connected to the heat conducting box 2 .

[0037] When mounting the universal joint on the heat transfer housing 2, a detachable connection method, such as bolts, is used. The heat transfer housing 2 is pre-determined with internally threaded mounting holes, and the universal joint's connection portion is designed with corresponding external threads. The universal joint is secured to the heat transfer housing 2 by tightening the bolts. To maintain or replace the universal joint, simply loosen the bolts to remove it from the heat transfer housing 2.

[0038] In the embodiments of the present application, the detachable connection facilitates maintenance and component replacement. If the universal joint becomes worn or damaged during long-term use, it can be quickly disassembled for repair or replacement without requiring extensive disassembly of the entire device. This reduces overall maintenance costs and time, improves maintainability and service life, and ensures continuous and stable production.

[0039] In a possible embodiment, the universal joint is made of high temperature resistant material.

[0040] Considering the high temperatures encountered during the overflow glass substrate forming process, the universal joint can be made of ceramic material to maintain its structural and performance stability at high temperatures. For example, alumina ceramic material can be used to form a universal joint of the desired shape and size through molding and sintering processes, and then mounted on the heat transfer box 2.

[0041] In the embodiment of the present application, the use of high-temperature resistant materials ensures the stability and reliability of the universal joint in a high-temperature environment, avoids deformation or damage of the universal joint due to high temperature, thereby ensuring that the thickness duct 4 can rotate stably for a long time, ensuring the long-term effective operation of the thickness adjustment device in a high-temperature production environment, extending the service life of the universal joint, and ensuring the reliability of the production of the glass sheet 6 and the stability of the product quality.

[0042] In a possible embodiment, the rotation angle of the universal joint is 0-360°.

[0043] After the universal joint and the thickness air duct 4 are installed, the universal joint can be rotated within the range of 0° to 360° by means of an electric push rod or manual adjustment.

[0044] Therefore, when the thickness of the glass sheet 6 in a certain area needs to be adjusted, the universal joint is rotated to the required precise angle according to the control signal or manual operation.

[0045] In the embodiment of the present application, the 360° rotation angle range enables the adjustment range of the thickness duct 4 to cover the entire circumference, and the array-distributed duct adjustment areas are seamlessly connected, which can perform all-round cooling air adjustment on different positions of the glass sheet 6, greatly expanding the range of action of the cooling air. No matter where the thickness deviation occurs on the glass sheet 6, the thickness duct 4 can be aligned with the area by adjusting the universal joint angle, thereby improving the flexibility and comprehensiveness of the thickness adjustment of the glass sheet 6 and helping to achieve more precise thickness control.

[0046] In a possible embodiment, the heat-conducting box body 2 is provided with an inclined surface, which is arranged parallel to the inclined surface of the overflow brick 1 .

[0047] When manufacturing the heat-conducting box body 2, one side thereof is processed into a bevel. By measuring the bevel angle of the overflow brick 1, the bevel angle of the heat-conducting box body 2 is processed to be parallel thereto.

[0048] In the embodiment of the present application, the inclined surface of the heat conducting box body 2 is arranged parallel to the inclined surface of the overflow brick 1, which helps to guide the flow direction of the cooling air so that it better matches the flow direction of the glass sheet 6, so that the cooling air can act more effectively on the glass sheet 6, thereby improving the utilization efficiency of the cooling air, reducing the energy loss caused by the inconsistency between the wind direction and the flow direction of the glass sheet 6, further optimizing the adjustment effect of the thickness of the glass sheet 6, and improving the accuracy and efficiency of the adjustment.

[0049] In a possible embodiment, a control system is also included, which may include a thickness detection sensor, a controller and an actuator. In the embodiment of the present application, the control system, the thickness detection sensor, the controller and the actuator are all shown.

[0050] The thickness detection sensors are distributed on the glass sheet 6 production line and are used to monitor the thickness data of the glass sheet 6 in real time.

[0051] The controller receives data from the thickness detection sensor and issues control instructions to the actuator according to a preset thickness control algorithm.

[0052] The actuator accurately controls the rotation angle and cooling air volume of each thickness air duct 4 according to the instructions of the controller, so as to adjust the thickness of the glass sheet 6.

[0053] The thickness detection sensors can be high-precision laser displacement sensors, evenly distributed along the glass sheet 6 production line, to measure the thickness of the glass sheet 6 at different locations in real time. The controller, which can be a PLC or industrial computer, receives data from the thickness detection sensors and issues control instructions to the actuator based on a preset thickness control algorithm.

[0054] The actuator may be an electric push rod or a servo motor, which is used to control the rotation angle of the thickness air duct 4. At the same time, an electric regulating valve may be installed on the cooling air supply pipeline to control the cooling air volume.

[0055] When the controller receives the thickness data, it determines whether adjustment is needed based on the algorithm. If adjustment is needed, it sends a rotation angle instruction to the electric push rod or servo motor, and at the same time sends an air volume adjustment instruction to the electric control valve to achieve precise control of the thickness of the air duct 4.

[0056] In the embodiment of the present application, the control system achieves automated and intelligent thickness adjustment of the glass sheet 6. By monitoring the thickness of the glass sheet 6 in real time and automatically adjusting the rotation angle and cooling air volume of the thickness duct 4 according to a precise control algorithm, the thickness of the glass sheet 6 can be adjusted quickly and accurately, reducing manual intervention, improving the accuracy and efficiency of adjustment, and avoiding errors that may be caused by manual operation, thereby improving the consistency and stability of product quality and reducing labor costs and operational risks.

[0057] In a possible embodiment, a method for finely adjusting the thickness of a glass substrate formed by an overflow method includes: When a low point in thickness is detected on the glass sheet 6, the thickness air duct 4 is rotated to correspond to the low point in thickness; When the deviation of the thickness low point exceeds the preset threshold, the thickness of the low point is compensated by increasing the adjustment angle of the thickness air duct 4 facing the overflow slope; When there is a deviation between the thickness of the air duct 4 and the position of the lowest thickness point in the lateral direction, the lateral angle of the lowest thickness point is adjusted by rotating the adjacent air ducts to achieve precise adjustment of the thickness at the corresponding position.

[0058] On the glass sheet 6 production line, the thickness detection sensor continuously monitors the thickness of the glass sheet 6. When a low thickness point is detected in a certain area, the control system sends an instruction to the actuator based on the position information, driving the rotating part 5 to drive the thickness air duct 4 to rotate so that the thickness air duct 4 is aligned with the low thickness point.

[0059] For example, according to the horizontal coordinate of the lowest thickness point of the glass sheet 6, the corresponding thickness duct 4 number is found (for example, thickness detection points 1 to 100 correspond to thickness ducts No. 1 to No. 100, respectively). At the same time, the corresponding angle or air volume of the thickness duct 4 at the corresponding position number is adjusted by control according to the thickness deviation value.

[0060] If the deviation of the thickness low point exceeds the set threshold, for example, the deviation exceeds 5μm, the actuator is further adjusted to increase the rotation angle of the thickness air duct 4 in the direction facing the overflow slope to increase the cooling effect of the area and compensate for the thickness deviation.

[0061] When the thickness duct 4 is not completely aligned with the thickness low point in the transverse direction, the adjacent thickness duct 4 is rotated according to the position deviation information, and the direction of the cooling air is adjusted from a transverse angle to accurately adjust the thickness at that position.

[0062] In the embodiment of the present application, the thickness duct 4 is rotated and adjusted in a targeted manner according to the varying thickness deviations present on the glass sheet 6, achieving precise compensation for the lowest thickness point. By aligning the thickness duct 4 with the lowest thickness point and adjusting the angle, the uneven thickness of the glass sheet 6 can be effectively addressed, improving the quality and pass rate of the glass sheet 6, reducing the scrap rate caused by thickness deviations, and enhancing production efficiency and economic benefits.

[0063] In a possible embodiment, the method adopts a combined adjustment method in the actual adjustment process, that is, according to the thickness deviation and distribution on the glass sheet 6, the lateral position and height of the air duct are adjusted at the same time to achieve more comprehensive and refined thickness control.

[0064] In the actual adjustment process, when multiple thickness deviation points appear on the glass sheet 6, and these deviation points have both lateral and longitudinal deviations, the lateral and longitudinal positions of the thickness duct 4 are adjusted simultaneously according to the size and distribution of the thickness deviations.

[0065] For example, if a certain area of ​​the glass sheet 6 has a low thickness point and the low point deviates from the position directly opposite the thickness air duct 4, it is necessary to increase the adjustment angle of the thickness air duct 4 facing the overflow slope, and rotate the adjacent air ducts for lateral adjustment. The control system calculates reasonable lateral and longitudinal adjustment amounts based on a pre-set algorithm, and sends instructions to the actuator at the same time, so that the thickness air duct 4 performs corresponding combined adjustments.

[0066] In the embodiment of the present application, the combined adjustment method can more comprehensively handle complex thickness deviation situations, overcome the limitations of single-direction adjustment, achieve refined control of the thickness of the glass sheet 6, improve the flexibility and accuracy of adjustment, and better meet the strict requirements of high-precision, thin, and large-scale substrate glass production on thickness uniformity, improve the overall quality and performance of the product, and reduce the impact of thickness deviation on product quality.

[0067] In a possible embodiment, when a high point in thickness appears on the glass sheet 6 , the same principle may be used, but the method of outputting hot air through the thickness air duct 4 may be adjusted to achieve a corresponding adjustment effect on the high point in thickness of the glass sheet 6 .

[0068] When a high point in thickness is detected on the glass sheet 6, the control system switches the cooling air source of the thickness air duct 4 to a hot air source, or converts the original cooling air into hot air by installing a heating device such as a heating wire inside the thickness air duct 4. The temperature and flow rate of the hot air are adjusted according to the deviation of the high point in thickness.

[0069] For example, for a small deviation in the thickness peak, the hot air temperature can be appropriately increased while the hot air flow rate is kept small. For a large deviation in the thickness peak, the hot air temperature and flow rate can be significantly increased to achieve the desired heating effect on the glass in that area, thinning the glass and adjusting the thickness peak.

[0070] In the embodiment of the present application, not only can the low point of thickness be adjusted, but the high point of thickness can also be effectively handled. By outputting hot air to the thickness duct 4, two-way control of the thickness adjustment of the glass sheet 6 is achieved, the adjustment range and capacity of the thickness duct 4 are expanded, the means of adjusting the thickness of the glass sheet 6 are further improved, and the control ability of the thickness of the glass sheet 6 in the entire production process is improved, thereby ensuring the thickness uniformity of the product and improving the quality and pass rate of the product.

[0071] like Figure 2 and Figure 3 As shown, the thickness detection device detects that the glass sheet 6 has a non-flow (lateral) low point in thickness, which is located between the air ducts 31, 32, and 33 in the traditional thickness air duct 4 layout, as shown in positions 13 and 14. At this time, the device of the present invention is used to make adjustments: In one possible embodiment, the lateral position is adjusted: First, the control system sends a control signal to the corresponding universal joint, causing the adjacent thickness air duct 4 to rotate laterally. For example, the thickness air duct 4 at position 32 begins to rotate via its connected universal joint, adjusting the original cooling air direction so that the cooling air is blown accurately to the corresponding thickness low point position 13 or 14. This rotation operation can be precisely controlled by the universal joint angle through the electric actuator, directing the cooling air flow to the area requiring adjustment to compensate for the thickness deficiency in that area.

[0072] The control system calculates the required rotation angle based on a pre-set algorithm and the positional deviation information of the lowest thickness point, and sends the command to the actuator. The actuator drives the universal joint, which rotates the thickness air duct 4 to ensure that the cooling air accurately covers the lowest thickness point, cooling the glass in that area. This increases the viscosity of the glass in this area, thereby achieving the purpose of adjusting the thickness.

[0073] In one possible embodiment, the vertical position is adjusted: At the same time, in order to improve the sensitivity of the adjustment, the angle of the air duct is rotated longitudinally according to the viscosity distribution of the glass during the production process. For example, the thickness air duct 4 is rotated to Figure 2 The upward tilt of the thickness duct 4 brings the cooling area closer to the lower-viscosity area. By adjusting the universal joint connected to the thickness duct 4, the cooling air direction of the duct is adjusted from the original horizontal direction to a direction closer to the overflow brick 1. This allows the cooling air to affect the low-viscosity glass area near the overflow brick 1. By utilizing the temperature sensitivity of the glass in this area, the flow characteristics of the glass are more effectively changed, achieving precise thickness adjustment.

[0074] In actual operation, the rotation angle of the universal joint is measured by a precise angle sensor and fed back to the control system. The control system continuously adjusts the actuator based on the preset target angle and actual feedback information to ensure the accuracy of the air duct angle.

[0075] In more complex production situations, when the thickness deviation is relatively small, a combined adjustment method is used to control the thickness of the glass sheet 6 .

[0076] In the embodiment of the present application, the transverse and longitudinal rotation of the thickness air duct 4 by the universal joint allows cooling air to be accurately directed to the lowest thickness points, particularly to areas not directly adjacent to the lowest thickness points, such as positions 13 and 14, which are difficult to address with conventional technology. This effectively addresses the difficulty in adjusting the air due to duct layout limitations. Directing cooling air to these areas allows precise control of the cooling effect on the glass, enabling precise adjustment of the thickness of the glass sheet 6 and reducing the defective rate caused by thickness deviation.

[0077] The longitudinally rotating air duct brings it close to the low-viscosity area, which can take advantage of the fact that the glass in the low-viscosity area is more sensitive to temperature, and more effectively change the flow and solidification characteristics of the glass, further improving the sensitivity of the thickness adjustment, making the adjustment of the thickness deviation more accurate, which is conducive to achieving refined control of the thickness of the glass sheet 6, meeting the strict requirements of modern substrate glass manufacturing on thickness uniformity, especially in the production of thin and large-scale substrate glass, and can better control the thickness deviation within a very small range.

[0078] In one possible embodiment, the adjustment operation is combined: Suppose a small thickness deviation is detected in a local area of ​​the glass sheet 6. This area is neither directly below a conventional air duct nor exhibits a simple lateral or longitudinal deviation. Based on the size and location of the thickness deviation, the control system comprehensively considers the deviation and sends control signals to the universal joints corresponding to the multiple thickness air ducts 4.

[0079] The partial thickness duct 4 will be rotated to Figure 2 The thickness duct 4 is shown as a position within the vertical range of motion. The angles of adjacent ducts are also adjusted accordingly based on actual needs. For example, one thickness duct 4 can adjust its longitudinal angle to allow its cooling air to penetrate deeper into the low-viscosity area of ​​the glass. Simultaneously, the adjacent thickness duct 4 can adjust its transverse angle to extend the cooling air coverage to the thickness deviation area.

[0080] Based on the specific thickness deviation data, the control system uses a complex algorithm to accurately calculate the required rotation angle of each thickness duct 4, thereby precisely controlling the thickness ducts 4 at different locations. At the same time, based on real-time feedback from the production process, such as actual glass thickness and temperature changes, the control system dynamically adjusts the angle and cooling air volume of each duct to achieve the optimal adjustment effect.

[0081] In the embodiments of the present application, a combined adjustment method is employed to address complex thickness deviations, rather than being limited to adjustment in a single direction. By simultaneously adjusting the horizontal and vertical angles of multiple thickness ducts 4 for thickness deviations of varying locations and magnitudes, and dynamically adjusting according to varying deviations, various complex situations can be flexibly addressed, improving the adaptability and effectiveness of the device.

[0082] This combined adjustment method can make real-time and dynamic adjustments according to different thickness deviations in actual production, avoiding the defect of traditional technology that cannot effectively solve complex thickness deviation problems due to a single adjustment method, ensuring that the thickness of the glass sheet 6 can be effectively controlled under various complex working conditions, and ensuring the consistency and stability of product quality.

[0083] In one possible embodiment, the adjustment of the thickness high point is processed During the production process, when a high thickness point is detected on the glass sheet 6, the device of the present invention will adopt a hot air adjustment method.

[0084] When the monitoring device detects a high point in thickness on the glass sheet 6, the control system switches the thickness air duct 4 from supplying cooling air to supplying hot air. This can be accomplished by installing a heating device at the cooling air source or by installing a heating element such as an electric heating wire inside the thickness air duct 4 to heat the air passing through the thickness air duct 4 to the desired temperature.

[0085] The control system adjusts the hot air temperature and flow rate based on the deviation and location of the peak thickness point. For smaller peak thickness deviations, the hot air temperature can be controlled within an appropriate range, such as increasing from room temperature to around 900°C and blowing at a lower flow rate. For larger peak thickness deviations, the hot air temperature is raised to above 900°C, while the hot air flow rate is increased, and the angle of the thickness duct 4 is rotated according to the thickness variation of the glass sheet 6.

[0086] The hot air blown out will reduce the viscosity of the glass at the corresponding position, and the glass will become thinner under the action of its own gravity and pulling force, thereby achieving the purpose of adjusting the thickness of the highest point. Throughout the adjustment process, the temperature of the hot air is monitored by a temperature sensor to ensure that it is within the set range. At the same time, the flow rate of the hot air is precisely controlled by a flow control valve to ensure accurate adjustment of the thickness of the highest point.

[0087] In the present embodiment, effective adjustment can be made for both high and low points of thickness. By introducing a hot air adjustment method, thickness adjustment is improved. When adjusting high points, heated air is used to change the viscosity of the glass, thinning it. This achieves bidirectional adjustment of the thickness of the glass sheet 6, further improving product quality and performance.

[0088] Compared with the traditional technology that can only adjust the thickness by cooling, the bidirectional adjustment capability of the present invention can better balance the thickness of the glass sheet 6, making the thickness of the produced substrate glass more uniform, reducing product quality problems caused by uneven thickness, improving the product qualification rate and production efficiency, and reducing the production cost caused by thickness problems.

[0089] In summary, these specific embodiments and beneficial effects demonstrate the application methods and advantages of the invention in the overflow method substrate glass forming process. By precisely adjusting the low and high points of the thickness and flexibly handling complex situations, the production efficiency and product quality are improved, demonstrating the unique advantages and value of the invention.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that modifications to the technical solutions described in the aforementioned embodiments, or equivalent replacement of some or all of the technical features therein, do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A device for finely adjusting the thickness of overflow-based glass substrate molding, characterized in that: It comprises two heat-conducting boxes (2) and a cooling mechanism (3) arranged below the overflow brick (1); The heat-conducting box bodies (2) are respectively located on both sides of the glass sheet (6), and the cooling mechanisms (3) are respectively arranged on the heat-conducting box bodies (2); The cooling mechanism (3) comprises a plurality of thick air ducts (4) and a rotating member (5); The thickness air duct (4) is arranged on the rotating member (5), the air inlet of the thickness air duct (4) is connected to the cooling air, and the other end is arranged inside the heat conduction box (2); The rotating member (5) is arranged on the heat-conducting box (2) and is used to realize the rotation of the thickness air duct (4).

2. The device for finely adjusting the thickness of overflow-processed substrate glass molding according to claim 1, characterized in that: The rotating member (5) is configured as a universal joint.

3. The device for finely adjusting the thickness of substrate glass formed by overflow method according to claim 2, characterized in that: The universal joint is detachably connected to the heat-conducting box body (2).

4. The device for finely adjusting the thickness of substrate glass formed by overflow method according to claim 2, characterized in that: The universal joint is made of high temperature resistant material.

5. The device for finely adjusting the thickness of overflow-processed substrate glass molding according to claim 2, characterized in that: The rotation angle of the universal joint is 0-360°.

6. The device for finely adjusting the thickness of overflow-processed substrate glass molding according to claim 1, characterized in that: The heat-conducting box body (2) is provided with an inclined surface, and the inclined surface is arranged parallel to the inclined surface of the overflow brick (1).

7. The device for finely adjusting the thickness of overflow-processed substrate glass molding according to claim 1, characterized in that: Also included is a control system, the control system including a thickness detection sensor, a controller and an actuator; The thickness detection sensors are distributed on the glass sheet (6) production line and are used to monitor the thickness data of the glass sheet (6) in real time; The controller receives data from the thickness detection sensor and issues control instructions to the actuator according to a preset thickness control algorithm; The actuator accurately controls the rotation angle and cooling air volume of each thickness air duct (4) according to the instructions of the controller, so as to adjust the thickness of the glass sheet (6).

8. A method for finely adjusting the thickness of overflow substrate glass molding according to any one of claims 1 to 7, characterized in that: The method comprises: When a low thickness point is detected on the glass sheet (6), the thickness air duct (4) is rotated to correspond to the low thickness point; When the deviation of the thickness low point exceeds a preset threshold, the thickness of the low point is compensated by increasing the adjustment angle of the thickness air duct (4) facing the overflow slope; When there is a deviation between the thickness air duct (4) and the position of the thickness low point in the lateral direction, the lateral angle of the thickness low point is adjusted by rotating the adjacent air ducts to achieve accurate adjustment of the thickness at the corresponding position.

9. The method according to claim 8, characterized in that The method adopts a combined adjustment method in the actual adjustment process, that is, according to the thickness deviation and distribution of the glass sheet (6), the lateral position and height of the air duct are adjusted at the same time to achieve more comprehensive and refined thickness control.

10. The method according to claim 8, characterized in that When the glass sheet (6) has a high point in thickness, the same principle can be used, but the method is adjusted to output hot air through the thickness air duct (4) to achieve a corresponding adjustment effect on the high point in thickness of the glass sheet (6).

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