Overflow method substrate glass forming thickness compensation adjusting device

Abstract

The utility model discloses an overflow method substrate glass forming thickness compensation adjusting device which comprises two soaking box bodies and thickness compensation mechanisms, the soaking box bodies are arranged on the two sides of a glass sheet respectively, and the thickness compensation mechanisms are arranged on the soaking box bodies respectively. The thickness compensation mechanism comprises an air inlet pipe, a heating assembly and an air outlet pipe which are connected in sequence; the air inlet pipe is used for receiving input cooling air; the heating assembly is used for heating the input cooling air, so that the temperature of the heated air reaches the softening point of the glass sheet or above; the air outlet pipe penetrates through the soaking box body, and the end, away from the heating assembly, of the air outlet pipe is used for inputting heated cooling air into the soaking box body. According to the invention, the thickness of the glass sheet can be controlled more accurately and flexibly, so that the thickness of the glass sheet can be compensated and adjusted more effectively.

Description

Technical Field

[0001] This application belongs to the field of glass manufacturing technology, and specifically relates to an overflow method substrate glass forming thickness compensation and adjustment device. Background Technology

[0002] In the overflow-draw glass substrate manufacturing process, precise thickness control is crucial. Traditional processes adjust thickness by using laterally arranged cooling ducts located above the glass's softening point in areas of lower viscosity. These ducts generate a lateral temperature gradient by blowing cooling air, thus influencing the local viscosity of the glass and adjusting its thickness. However, as display technology continues to evolve towards higher resolution, thinner profiles, and larger sizes, the requirements for glass substrate thickness uniformity are becoming increasingly stringent, with thickness variations required to be within 5-10 μm.

[0003] Especially when dealing with uneven thickness distribution in certain areas, such as when the glass sheet is thicker in the middle and thinner on both sides, traditional cooling ducts are difficult to meet the needs of fine-tuning the thickness due to their small spacing, small installation hole diameter, and limited heating capacity. Utility Model Content

[0004] The purpose of this application is to provide an overflow method substrate glass forming thickness compensation and adjustment device. This addresses the aforementioned background technology requirements for high-definition, thin, and large-scale glass sheets, thereby achieving more precise and flexible control over the glass sheet thickness and more effective thickness compensation and adjustment.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] An overflow method substrate glass forming thickness compensation and adjustment device, which includes two heat exchange chambers and a thickness compensation mechanism;

[0007] The thickness compensation mechanism includes an air inlet pipe, a heating component, and an air outlet pipe connected in sequence.

[0008] The heat exchange chambers are respectively disposed on both sides of the glass plate, and the thickness compensation mechanisms are respectively disposed on the heat exchange chambers.

[0009] The air inlet duct is used to receive the incoming cooling air;

[0010] The heating component is used to heat the input cooling air so that the heated air temperature reaches above the softening point of the glass sheet.

[0011] The air outlet duct is installed through the heat exchange chamber, and the end of the air outlet duct away from the heating component is used to input heated cooling air into the heat exchange chamber.

[0012] In one possible implementation, the heating assembly includes a heating tube and a first heating wire;

[0013] One end of the heating element is connected to the air inlet pipe, and the other end is connected to the air outlet pipe;

[0014] The first heating wire is spirally wound inside the heating tube and connected to an external power source to heat the cooling air entering the heating tube.

[0015] In one possible implementation, a second heating wire is also included;

[0016] The second heating wire is spirally wound inside the heating tube and sleeved on the outside of the first heating wire. One end of the second heating wire is connected to an external power source.

[0017] In one possible implementation, an insulating tube disposed inside the heating tube is also included;

[0018] The heating tube is sleeved on the outside of the insulating tube, and the insulating tube is used to separate the first heating wire and the second heating wire.

[0019] In one possible implementation, the ratio of the inner diameter D of the heating tube to the diameter D1 of the air inlet and outlet pipes is greater than 4:1.

[0020] In one possible implementation, adapters are provided between the heating element and the air inlet pipe, and between the heating element and the air outlet pipe.

[0021] In one possible implementation, the ends of the two adapters that communicate with the heating tube are tapered openings, and the bottoms of the two tapered openings are positioned close to each other.

[0022] In one possible implementation, a diverter plate is provided at the tapered opening of the adapter, the diverter plate is located close to the air inlet pipe, and the diverter plate has multiple diverter holes.

[0023] In one possible implementation, sealing rings are provided at the connection points of the air inlet pipe, air outlet pipe, and adapter.

[0024] In one possible implementation, the heat exchange chamber is provided with a support plate for supporting the air outlet duct.

[0025] Compared with the prior art, this application has the following beneficial effects:

[0026] This application provides an overflow method substrate glass forming thickness compensation and adjustment device. By setting a heating component between the air inlet pipe and the air outlet pipe, when a continuous out-of-tolerance condition of the glass sheet is detected, the heating component is controlled to heat the cooling air input therein, so that the temperature of the cooling air is rapidly raised above the softening point of the glass sheet. Then, the heated air is input into the heat exchange chamber through the air outlet pipe to increase the temperature of the corresponding area of ​​the glass sheet, thereby reducing its viscosity. During the gradual cooling process, thickness uniformity compensation and adjustment are achieved, thus achieving the purpose of adjusting thickness uniformity. The device is simple to install, flexible to operate, and effectively improves the quality of the glass sheet and the compensation efficiency.

[0027] In one possible implementation, by introducing a combination design of heating tube and first heating wire, efficient and precise heating of cooling air is achieved, which significantly improves the thickness compensation effect of glass sheet and provides a strong guarantee for high-quality production of glass sheet.

[0028] In one possible implementation, a spirally wound second heating wire is installed inside the heating tube. Power can be supplied to the second heating wire and the first heating wire simultaneously to improve heating efficiency and quickly heat the cooling air to above the softening point of the glass sheet. At the same time, through the coordinated control of the first heating wire and the second heating wire, when different temperature compensation is required at different positions of the glass sheet, the power of the first heating wire and the second heating wire can be adjusted to achieve more precise thickness compensation of the glass sheet.

[0029] In one possible implementation, the design of the heating assembly is further optimized by introducing an insulating tube, which improves electrical safety performance, temperature control stability, and the service life of the heating wire, thus ensuring high-quality production of glass sheets.

[0030] In one possible implementation, the space of the small diameter of the air inlet and outlet pipes is fully utilized. By adjusting the pipe diameter ratio to reduce the airflow velocity, the heating power can be increased. This approach offers advantages such as uniform and sufficient heating, high outlet air temperature, convenient installation and replacement, and safety and reliability.

[0031] In one possible implementation, by introducing an adapter, the connection between the heating tube and the air inlet and outlet tubes is optimized, improving the flexibility, stability and ease of maintenance of the connection, thus ensuring the high-quality production of glass sheets.

[0032] In one possible implementation, the shape of the adapters is specifically designed, with the ends of the two adapters connected to the heating tubes having tapered openings, and the bottoms of the two tapered openings being positioned close to each other. This design optimizes airflow distribution, improves heating efficiency, and allows the heating temperature to reach the required temperature rapidly.

[0033] In one possible implementation, the design of the flow divider plate and flow divider orifice allows the airflow to be distributed more evenly within the heating tube as it passes through the adapter, avoiding problems such as localized overheating or underheating. This helps improve heating efficiency and the accuracy of temperature control. Attached Figure Description

[0034] Figure 1 A schematic diagram of the overall structure of an overflow method substrate glass forming thickness compensation and adjustment device provided in this application;

[0035] Figure 2 An enlarged view of an overflow method substrate glass forming thickness compensation and adjustment device provided in this application;

[0036] Figure 3 A schematic diagram of one perspective for thickness compensation adjustment provided in this application;

[0037] Figure 4 A schematic diagram illustrating another perspective of the thickness compensation adjustment provided in this application;

[0038] The attached figures are labeled as follows: 1. Heat exchanger box; 2. Thickness compensation mechanism; 21. Air inlet pipe; 22. Heating assembly; 221. Heating tube; 222. First heating wire; 223. Second heating wire; 224. Insulating tube; 23. Air outlet pipe; 24. Adapter; 25. Diverter plate; 26. Sealing ring; 3. Support plate; 4. Glass plate. Detailed Implementation

[0039] The specific embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0040] like Figure 1 and Figure 2 As shown, this application discloses an overflow method substrate glass forming thickness compensation and adjustment device, which may include two heat exchange chambers 1 and a thickness compensation mechanism 2.

[0041] The heat exchange chamber 1 is respectively installed on the left and right sides of the glass plate 4, and the thickness compensation mechanism 2 is respectively installed on the heat exchange chamber 1.

[0042] The thickness compensation mechanism 2 may include an air inlet pipe 21, a heating component 22, and an air outlet pipe 23 connected in sequence.

[0043] Optionally, the air inlet duct 21 can be made of corundum ceramic with a temperature resistance greater than 1400℃, for receiving the input cooling air.

[0044] When the glass plate 4 is detected to be continuously out of tolerance, the heating component 22 is adjusted so that the heating component 22 heats the input cooling air. Under the action of the heating component 22, the temperature of the heated air can quickly reach above the softening point of the glass plate 4, that is, the air temperature range is between 900-1000℃, and the air temperature can be 950℃.

[0045] The air outlet duct 23 is installed through the heat exchange chamber 1. A support plate 3 is installed on the heat exchange chamber 1. The end of the air outlet duct 23 near the heating component 22 is installed through the support plate 3, and the end of the air outlet duct 23 away from the heating component 22 is used to input the heated cooling air into the heat exchange chamber 1.

[0046] Optionally, the air outlet duct 23 is made of corundum ceramic with a heat resistance temperature greater than 1400℃, and is used to output air to the interior of the heat exchange box 1.

[0047] In this embodiment, a heating component 22 is installed between the air inlet pipe 21 and the air outlet pipe 23. When continuous out-of-tolerance conditions are detected in the glass sheet 4, the heating component 22 is controlled to heat the cooling air input therein, so that the temperature of the cooling air is rapidly raised above the softening point of the glass sheet 4. Then, the heated air is input into the heat exchange chamber 1 through the air outlet pipe 23 to increase the temperature of the glass sheet 4 in the corresponding area, thereby reducing its viscosity. During the gradual cooling process, thickness uniformity compensation adjustment is achieved, thus achieving the purpose of adjusting thickness uniformity. The installation is simple, the operation is flexible, and the quality and compensation efficiency of the glass sheet 4 are effectively improved.

[0048] In one possible embodiment, the heating assembly 22 may include a heating tube 221 and a first heating wire 222.

[0049] One end of the heating tube 221 is connected to the air inlet pipe 21 to ensure that the cooling air can enter smoothly, and the other end is connected to the air outlet pipe 23 to deliver the heated air to the interior of the heat exchange box 1.

[0050] The heating element 221 can be made of corundum ceramic, with a temperature resistance greater than 1400℃, and is used to receive the input cooling air.

[0051] The first heating wire 222 is spirally wound and distributed inside the heating tube 221 and connected to an external power source to heat the cooling air entering the heating tube 221.

[0052] Optionally, the material of the first heating wire 222 can be set as iron-chromium-aluminum or other high-temperature resistant heating materials, with a maximum temperature resistance greater than 1400℃.

[0053] In this embodiment, by introducing a combination design of heating tube 221 and first heating wire 222, efficient and precise heating of cooling air is achieved, significantly improving the thickness compensation effect of glass sheet 4 and providing a strong guarantee for the high-quality production of glass sheet 4.

[0054] In one possible embodiment, a second heating wire 223 may also be included.

[0055] The second heating wire 223 is spirally wound inside the heating tube 221 and sleeved on the outside of the first heating wire 222. The second heating wire 223 maintains a certain gap with the inner wall of the heating tube 221. One end of the second heating wire 223 is connected to an external power source to form an independent circuit.

[0056] Optionally, the material of the first heating wire 222 is the same as that of the first heating wire 222, and the maximum temperature resistance of the first heating wire 222 is greater than 1400℃.

[0057] In this embodiment, a spirally wound second heating wire 223 is provided inside the heating tube 221. Power can be supplied to the second heating wire 223 and the first heating wire 222 simultaneously, improving heating efficiency and enabling the cooling air to be heated to above the softening point of the glass sheet 4 quickly. At the same time, through the coordinated control of the first heating wire 222 and the second heating wire 223, when different temperature compensation is required at different positions of the glass sheet 4, the power of the first heating wire 222 and the second heating wire 223 can be adjusted to achieve more precise thickness compensation for the glass sheet 4.

[0058] In one possible embodiment, an insulating tube 224 disposed inside the heating tube 221 may also be included.

[0059] The heating tube 221 is sleeved on the outside of the insulating tube 224, and the insulating tube 224 is used to separate the first heating wire 222 and the second heating wire 223.

[0060] Optionally, the insulating tube 224 is made of a high-insulation material, such as ceramic or special plastic, to prevent direct contact between the first heating wire 222 and the second heating wire 223, which could lead to a short circuit or current interference.

[0061] In this embodiment, the design of the heating assembly 22 is further optimized by introducing the insulating tube 224, which improves electrical safety performance, temperature control stability and heating wire lifespan, thus ensuring high-quality production of the glass sheet 4.

[0062] In one possible embodiment, the ratio of the inner diameter D of the heating tube 221 to the diameter D1 of the air inlet pipe 21 and the air outlet pipe 23 is greater than 4:1.

[0063] In this embodiment, the space of the small diameter of the air inlet pipe 21 and the air outlet pipe 23 is fully utilized. By adjusting the pipe diameter ratio to reduce the air flow rate, the heating power can be improved. It has the advantages of uniform and sufficient heating, high air outlet temperature, convenient installation and replacement, and safety and reliability.

[0064] In one possible embodiment, adapters 24 are provided between the heating tube 221 and the air inlet pipe 21, and between the heating tube 221 and the air outlet pipe 23.

[0065] The air inlet pipe 21, adapter 24, heating pipe 221, air outlet pipe 23, and support plate 3 are all bonded together with high-temperature resistant ceramic adhesive.

[0066] Optionally, the cross-sectional shape of the adapter 24 can be designed according to the diameter of the heating pipe 221, the air inlet pipe 21 and the air outlet pipe 23, and the material of the adapter 24 can be set as corundum ceramic with a temperature resistance greater than 1400℃, for conveying cooling air.

[0067] In this embodiment, by introducing an adapter 24, the connection between the heating tube 221 and the air inlet pipe 21 and the air outlet pipe 23 is optimized, which improves the flexibility, stability and ease of maintenance of the connection, and provides a guarantee for the high-quality production of the glass sheet 4.

[0068] In one possible embodiment, the ends of the two adapters 24 that communicate with the heating tube 221 are tapered openings, and the bottoms of the two tapered openings are positioned close to each other.

[0069] In this embodiment, the shape of the adapter 24 is specifically designed. The ends of the two adapters 24 that connect to the heating tube 221 have tapered openings, and the bottoms of the two tapered openings are positioned close to each other. This design optimizes airflow distribution, improves heating efficiency, and enables the heating temperature to reach the required temperature quickly.

[0070] In one possible embodiment, the tapered opening of the adapter 24 is provided with a diverter plate 25, which is located near the air inlet pipe 21, and the diverter plate 25 is provided with a plurality of diverter holes, which are not shown.

[0071] In this embodiment, the design of the flow divider 25 and the flow divider orifice allows the airflow to be more evenly distributed within the heating tube 221 when passing through the adapter 24, avoiding the problem of localized overheating or insufficient airflow. This helps to improve heating efficiency and the accuracy of temperature control.

[0072] In one possible embodiment, a sealing ring 26 is provided at the connection between the air inlet pipe 21, the air outlet pipe 23 and the adapter 24.

[0073] Optionally, the sealing ring 26 may be configured as a high-temperature resistant sealing ring 26.

[0074] In this embodiment, the sealing ring 26 improves the overall sealing performance and stability, avoiding energy loss and safety hazards caused by gas leakage. At the same time, the sealing ring 26 is easy to maintain and replace, and has strong applicability.

[0075] like Figure 3 and Figure 4 As shown, when glass sheet 4 is pulled down, the thickness detection results shown in the figure appear, that is, the thickness values ​​d1\d2\d3\d4\d5 corresponding to the longitudinal positions a\b\c\d\e of glass sheet 4. Among them, the thickness of d1\d3\d5 is too thick and exceeds the tolerance, while the thickness of the interval d2 / d4 is too thin.

[0076] If cooling air is blown onto the positions corresponding to d2 and d4, the thickness of glass sheet 4 corresponding to d1, d3 and d5 will continue to deteriorate.

[0077] Therefore, by simultaneously supplying power to the first heating wire 222 and the second heating wire 223, the cooling air inside the heating tube 221 can be rapidly heated to above the softening point of the glass plate 4.

[0078] The cooling air at positions a / c / e corresponding to positions d1, d3, and d5 in the diagram will be replaced with hot air that meets the softening point of the glass plate and is above 4, so that its temperature is higher than 900℃.

[0079] Therefore, the viscosity and surface tension of the glass sheet 4 in the corresponding area decrease, and the thickness at the corresponding position is significantly improved due to the influence of surface tension during the continuous downward pulling process.

[0080] In addition, during the pull-down process, the glass sheet 4 may exhibit continuous low points, continuous high points, or a combination of continuous low points and continuous high points. In all these cases, the overflow method for substrate glass forming thickness compensation adjustment described above can be used to adjust the glass sheet 4 until the thickness of the corresponding position of the glass sheet 4 is significantly improved.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them; although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications to the technical solutions described in the foregoing embodiments, or equivalent substitutions for some or all of the technical features, do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A thickness compensation and adjustment device for overflow method substrate glass forming, characterized in that, It comprises two soaking boxes (1) and thickness compensation mechanisms (2). The soaking boxes (1) are arranged on both sides of the glass sheet (4) respectively, and the thickness compensation mechanisms (2) are arranged on the soaking boxes (1) respectively. The thickness compensation mechanism (2) comprises an air inlet pipe (21), a heating assembly (22) and an air outlet pipe (23) connected in sequence. The air inlet pipe (21) is used for receiving the input cooling air. The heating assembly (22) is used for heating the input cooling air, so that the temperature of the heated air reaches above the softening point of the glass sheet. The air outlet pipe (23) is arranged through the soaking box (1), and one end of the air outlet pipe (23) away from the heating assembly (22) is used for inputting the heated cooling air into the soaking box (1).

2. The overflow method substrate glass thickness compensation adjusting apparatus according to claim 1, characterized by, The heating assembly (22) comprises a heating pipe (221) and a first heating wire (222). One end of the heating pipe (221) is in communication with the air inlet pipe (21), and the other end is in communication with the air outlet pipe (23). The first heating wire (222) is spirally wound and arranged in the inside of the heating pipe (221) and connected with an external power source, and is used for heating the cooling air entering the heating pipe (221).

3. The overflow method substrate glass thickness compensation adjusting apparatus according to claim 2, characterized by, It also comprises a second heating wire (223). The second heating wire (223) is spirally wound and arranged in the inside of the heating pipe (221) and sleeved on the outside of the first heating wire (222), and one end of the second heating wire (223) is connected with an external power source.

4. The overflow method substrate glass thickness compensation adjusting apparatus according to claim 2 or 3, characterized by It also comprises an insulating pipe (224) arranged in the inside of the heating pipe (221). The heating pipe (221) is sleeved on the outside of the insulating pipe (224), and the insulating pipe (224) is used for separating the first heating wire (222) and the second heating wire (223).

5. The overflow method substrate glass thickness compensation adjusting apparatus according to claim 2, wherein The ratio of the inner diameter D of the heating pipe (221) to the pipe diameter D1 of the air inlet pipe (21) and the air outlet pipe (23) is greater than 4:

1.

6. The overflow method substrate glass thickness compensation adjusting apparatus according to claim 2, wherein The heating pipe (221) and the air inlet pipe (21) and the air outlet pipe (23) are provided with an adapter (24).

7. The overflow process substrate glass thickness compensation adjustment apparatus according to claim 6, characterized by, One end of the two adapters (24) in communication with the heating pipe (221) is a tapered opening, and the bottoms of the two tapered openings are arranged close to each other.

8. The overflow method substrate glass thickness compensation adjusting apparatus according to claim 7, wherein The tapered opening of the adapter (24) is provided with a flow dividing disc (25), the flow dividing disc (25) is arranged close to the air inlet pipe (21), and a plurality of flow dividing holes are formed in the flow dividing disc (25).

9. The overflow method substrate glass thickness compensation adjusting apparatus according to claim 7, wherein The air inlet pipe (21), the air outlet pipe (23) and the adapter (24) are provided with a sealing ring (26) at the connection position.

10. The overflow method substrate glass thickness compensation adjusting apparatus according to claim 7, wherein The soaking box (1) is provided with a support plate (3) for supporting the air outlet pipe (23).

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