Spray coating mechanism for manufacturing large-size curved-surface display

By introducing a limit frame and photoelectric sensor into the spray coating equipment, the problem of substrate skew is solved, and precise control and efficient production of the spraying process are achieved.

CN222568123UActive Publication Date: 2025-03-07HEESUNG ELECTRONICS (GUANGZHOU) CO LTD
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Patent Information

Application Number
CN202421046727.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-14
Publication Date
2025-03-07
Estimated Expiration
2034-05-14

AI Technical Summary

Technical Problem

The existing spray coating equipment does not have deviation correction equipment. When the substrate is deflected, the user cannot know in time to adjust the substrate, and the use effect is not ideal.

Method used

A spray coating mechanism prepared by a large-size curved surface display is designed, including a limit frame, a base material, a shell and a nozzle. A limit frame is installed in the shell, and a slot and a limit slot are provided on the limit frame. The photoelectric sensor is used to monitor the position of the substrate to prevent deflection.

Benefits of technology

Through real-time monitoring of photoelectric sensors, the deflection of the substrate can be discovered and corrected in a timely manner, ensuring accuracy and consistency during the spraying process, and improving production efficiency and product quality.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of curved surface display preparation, in particular to a jet coating mechanism for preparing a large-size curved surface display. According to the technical scheme, the spray coating mechanism for preparing the large-size curved-surface displayer comprises a limiting frame, a base material, a shell and a spray pipe, the limiting frame is installed in the shell, a notch is formed in the limiting frame, a limiting groove is formed in the limiting frame, the base material is placed on the limiting frame in a limiting mode through the limiting groove, and the spray pipe is arranged on the base material. A spraying pipe is arranged on one side of the shell, spraying heads are evenly arranged on the spraying pipe, a photoelectric sensor is installed on the side, away from the spraying heads, of the limiting frame, and a liquid collecting groove is formed in the bottom end of the shell. The spraying device has the advantages of being accurate and uniform in spraying, material-saving, simple and convenient to operate and the like, is suitable for the preparation process of the large-size curved-surface display, and is beneficial to improving the product quality and the production efficiency.
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Description

Technical Field

[0001] The utility model relates to the technical field of preparation of curved surface displays, in particular to a spray coating mechanism for preparation of large-size curved surface displays. Background Art

[0002] A curved display is a display device that uses a curved design on the screen surface. Compared with traditional flat-panel displays, curved displays can better wrap the user's field of vision and provide a more immersive viewing experience. Its design inspiration usually comes from the human eye's perception of the surrounding environment. For example, the human visual system is curved, so the curved display can better simulate the natural perception of the human eye. This design can enhance the depth and three-dimensional sense of the image and increase the user's immersion in the screen content. In the manufacture of liquid crystal displays, spray coating is usually used to apply liquid crystal materials, alignment layers, protective layers, etc. Spray coating can achieve high-speed and high-precision coating, while ensuring that the coating is evenly distributed on the substrate, and can achieve cost-effectiveness in large-scale production. However, the existing spray coating equipment does not have a correction device. When the substrate is deflected, the user cannot know in time to adjust the substrate, and the use effect is not ideal. Utility Model Content

[0003] The utility model provides a spray coating mechanism for preparing a large-size curved display, which solves the above-mentioned technical problems.

[0004] The utility model solves the above-mentioned technical problems as follows:

[0005] A spray coating mechanism for preparing a large-size curved display comprises a limit frame, a substrate, a shell and a nozzle, wherein a limit frame is installed inside the shell, a notch is opened on the limit frame, a limit groove is arranged inside the limit frame, a substrate is placed on the limit frame through the limit groove, a nozzle is arranged on one side of the shell, nozzles are evenly arranged on the nozzle, a photoelectric sensor is installed on the side of the limit frame away from the nozzle, and a liquid collecting tank is arranged at the bottom end of the shell.

[0006] On the basis of the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, a through hole is formed through the shell, and the substrate passes through the through hole of the shell.

[0008] The beneficial effects of adopting the above further scheme are:

[0009] Direct access to substrate: The through-hole design allows the substrate to pass directly through the housing so that the spray equipment can directly access the substrate surface. This direct access allows the spray head to spray on the substrate without being hindered by the housing during the spray process.

[0010] Precise spray control: Since the substrate passes directly through the through-hole, the nozzle can spray the substrate more accurately. The nozzle can move freely around the through-hole to adjust the spray angle and position, thereby achieving precise coating on the substrate surface, improving the accuracy and consistency of spraying.

[0011] Avoid spraying resistance: The through-hole design avoids friction and resistance between the substrate and the shell, making the spraying process smoother. This ensures that the spraying material is evenly covered on the surface of the substrate, avoiding uneven coating or damage caused by friction.

[0012] Improve production efficiency: Spraying the substrate directly through the nozzle inside the shell can improve production efficiency. The nozzle can spray the substrate directly without additional operation steps or equipment, saving production time and cost and improving production efficiency.

[0013] Convenient operation: The through-hole design makes loading and unloading of substrates easier and more convenient. Operators can easily insert or remove the substrate through the through-hole without having to disassemble or adjust the spraying mechanism significantly, saving operation time and improving operation efficiency.

[0014] Furthermore, the nozzles are evenly distributed on the nozzle pipe, and the positions of the nozzles correspond to the positions of the substrate.

[0015] The beneficial effects of adopting the above further scheme are:

[0016] Uniform spraying: The nozzles are evenly distributed on the nozzle, ensuring that the spray material can evenly cover the entire substrate surface. This design can avoid uneven spraying or missed spraying, and improve the quality and consistency of spraying.

[0017] Save spraying materials: Evenly distributed nozzles ensure the effective use of spraying materials. The position of each nozzle corresponds to the position of the substrate, and the spraying material can be accurately sprayed to the target area of ​​the substrate, reducing the waste of spraying materials and saving production costs.

[0018] Improve production efficiency: The nozzles are evenly distributed and correspond to the position of the substrate, making the entire spraying process more efficient. Operators do not need to adjust the nozzle position or spraying parameters too much, which reduces operation time and improves production efficiency.

[0019] Accurate spraying position: The position of the nozzle corresponds to the position of the substrate, ensuring that the spray material is accurately sprayed on the target area of ​​the substrate. This design ensures the accuracy of spraying, avoids spraying deviation or misalignment, and improves the quality and consistency of the product.

[0020] Reduce manual intervention: The evenly distributed nozzles and the design corresponding to the position of the substrate reduce the need for manual intervention. Once the spraying parameters are set, the operator can easily perform the spraying operation, reducing the impact of human factors on the production process and improving the stability and reliability of production.

[0021] Furthermore, the notch is located on a side of the limiting frame away from the nozzle, so as to facilitate the spraying material gathered in the limiting frame to flow to the liquid collecting tank.

[0022] The beneficial effects of adopting the above further scheme are:

[0023] Material recovery and reuse: The notch on the side of the limit frame away from the nozzle helps to flow the unsprayed material to the sump. This design can effectively recover and collect the unused spraying materials during the spraying process for reuse. In this way, material waste can be reduced, production costs can be reduced, and it is environmentally friendly.

[0024] Keep the working environment clean: During the spraying process, some spray materials may scatter into the machine or the surrounding environment. If not cleaned up in time, it may affect the normal operation of the equipment and even cause safety hazards. By setting the notch on the side away from the nozzle, most of the spray materials can be concentrated to the liquid collection tank, which helps to keep the working environment clean and tidy.

[0025] Reduced maintenance costs: Avoiding the accumulation of spray material inside the equipment helps reduce equipment failure and damage. Regularly cleaning the spray material in the sump can keep the equipment in good condition, extend the service life of the equipment, and reduce maintenance costs and repair time.

[0026] Improve spraying quality: By collecting unused spraying materials in a timely manner, the spraying area can be kept clean and impurities can be avoided, thereby improving the quality and consistency of the spraying. This helps ensure that the appearance and performance of the final product meet the expected standards.

[0027] Furthermore, a connecting pipe is provided at the liquid collecting tank, and the spraying material in the liquid collecting tank flows back to the spraying equipment through the connecting pipe so as to be reused.

[0028] The beneficial effects of adopting the above further scheme are:

[0029] Effective use of resources: Returning the unused spraying materials during the spraying process to the spraying equipment can effectively utilize resources. This recycling practice reduces material waste, reduces production costs, and reduces the demand for raw materials, which is conducive to resource conservation and sustainable utilization.

[0030] Environmentally friendly: By returning unused spraying materials to the spraying equipment for reuse, waste generation can be reduced, reducing the negative impact on the environment. This helps reduce pollution and resource consumption, protects the environment, and is in line with the concept of sustainable development.

[0031] Reduce production costs: The cost of spray materials usually accounts for a considerable proportion of the production process. By recycling and reusing unused spray materials, the cost of purchasing raw materials can be saved. In addition, reducing the cost of waste disposal can also help reduce production costs and improve the competitiveness of enterprises.

[0032] Improve production efficiency: Instead of frequently changing the spraying material, the unused material can be used by reflow, which helps to improve production efficiency. This can reduce downtime, improve equipment utilization, increase production output, and improve the operating efficiency of the production line.

[0033] Simplify the management process: The recycling of spray materials simplifies the process of waste disposal and cleaning. Managers do not have to spend extra time and energy to deal with waste, but can focus more resources on production activities, improving management efficiency.

[0034] Furthermore, the photoelectric sensor is used to monitor the substrate at the inner edge of the limiting groove of the limiting frame, thereby monitoring the position of the substrate to prevent the substrate from deflecting.

[0035] The beneficial effects of adopting the above further scheme are:

[0036] Accurate position monitoring: The photoelectric sensor can accurately monitor the position of the substrate at the edge of the limit groove of the limit frame. Such monitoring can obtain the position information of the substrate in real time, ensuring that the substrate maintains the correct position during the spraying process, thereby ensuring the accuracy and consistency of the spraying.

[0037] Prevent substrate deflection: If the substrate deflects during the spraying process, it may cause uneven distribution of the spray material, thus affecting the quality and appearance of the coating. By monitoring the position of the substrate with a photoelectric sensor, the deflection of the substrate can be detected and corrected in time, preventing quality problems caused by it and improving production efficiency and product quality.

[0038] Reduce errors in production: Real-time monitoring of the substrate position by photoelectric sensors can avoid substrate deflection caused by human negligence or misoperation, reduce possible errors in the production process, and improve production reliability and stability.

[0039] Improve equipment utilization: By preventing the substrate from deflecting, the stability and accuracy of the substrate during the spraying process can be ensured, thereby avoiding spraying waste and production downtime caused by substrate deflection. This helps to improve equipment utilization, increase production efficiency and output.

[0040] The beneficial effects of the utility model are:

[0041] Precise spraying position control: The spraying position is crucial for the preparation of displays. Through the combination of the limit frame, the limit slot and the photoelectric sensor, the mechanism can accurately control the position of the substrate. The limit frame is provided with a limit slot, the substrate is placed in the limit slot, and the photoelectric sensor monitors the edge position of the substrate in the limit slot. This design ensures that the substrate maintains an accurate position during the spraying process, avoiding inaccurate or misaligned spraying due to position offset.

[0042] Uniform distribution of nozzles: Uniform distribution of nozzles is one of the key factors to ensure that the spray material evenly covers the surface of the substrate. In this mechanism, nozzles are evenly arranged on the nozzle pipe, and the positions of these nozzles correspond to the positions of the substrate. This design can ensure that the spray material is evenly released at the nozzle, so that the coating forms a uniform thickness and quality on the surface of the substrate, improving the visual effect and performance stability of the display.

[0043] Recycling of spray materials: During the spraying process, some of the spray materials are often not used. If these materials are wasted, it will increase production costs and have a negative impact on the environment. Therefore, the design with a sump and a connecting pipe can effectively recycle the unused spray materials during the spraying process. These materials flow back to the spraying equipment through the connecting pipe for reuse, thereby reducing material waste, reducing production costs, and benefiting environmental protection.

[0044] Simple and compact structure: The mechanism is simple and compact in design, with a clear structure and easy installation and maintenance. The key components such as the limit frame, nozzle, nozzle, photoelectric sensor, etc. are reasonably arranged and easy to operate, allowing operators to easily adjust and maintain the equipment. This simple and compact structural design helps to improve production efficiency and work efficiency, and reduces equipment failures and maintenance time during operation.

[0045] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiment of the utility model with the accompanying drawings. The specific implementation method of the utility model is given in detail by the following embodiments and their drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0047] In the attached picture:

[0048] Figure 1 It is a side view schematic diagram of the utility model;

[0049] Figure 2 This is a schematic diagram of the axial side appearance of the housing of the utility model;

[0050] Figure 3 This is a schematic diagram of the rear view of the limiting frame of the utility model;

[0051] Figure 4 It is a schematic diagram of the axial side appearance of the limiting frame of the utility model.

[0052] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0053] 1. Limiting groove; 2. Limiting frame; 3. Through hole; 4. Base material; 5. Photoelectric sensor; 6. Housing; 7. Nozzle; 8. Nozzle; 9. Liquid collecting tank; 10. Notch. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0055] See also Figures 1 to 4 As shown, the embodiments provided by the utility model:

[0056] Embodiment 1

[0057] A spray coating mechanism for preparing a large-size curved display comprises a limit frame 2, a substrate 4, a shell 6 and a nozzle 8. The limit frame 2 is installed inside the shell 6, and a notch 10 is provided on the limit frame 2. The notch 10 is located on the side of the limit frame 2 away from the nozzle 7, so that the spray material gathered in the limit frame 2 can flow to the liquid collecting tank 9. The notch 10 arranged on the side of the limit frame 2 away from the nozzle 7 helps to flow the unsprayed material to the liquid collecting tank 9. Such a design can effectively recycle and collect the unused spray material in the spraying process for reuse. In this way, material waste can be reduced, production costs can be reduced, and it is environmentally friendly. During the spraying process, some spray materials may be scattered inside the machine or in the surrounding environment. If they are not cleaned up in time, they may affect the normal operation of the equipment and even cause safety hazards. By setting the notch 10 on the side away from the nozzle 7, most of the spray materials can be concentrated to flow to the liquid collecting tank 9, which helps to keep the working environment clean and tidy. The accumulation of spraying materials inside the equipment is avoided, which helps to reduce equipment failures and damage. Regularly cleaning the spraying materials in the liquid collecting tank 9 can keep the equipment in good condition, extend the service life of the equipment, and reduce maintenance costs and repair time. By collecting unused spraying materials in a timely manner, the spraying area can be kept clean and impurities can be avoided, thereby improving the quality and consistency of the spraying. This helps to ensure that the appearance and performance of the final product meet the expected standards. A limiting groove 1 is provided in the limiting frame 2. The limiting frame 2 is limited by the limiting groove 1 to place the substrate 4. A through hole 3 is opened on the shell 6. The substrate 4 passes through the through hole 3 of the shell 6. The through hole 3 is designed to allow the substrate 4 to pass directly through the shell 6, so that the spraying equipment can directly access the surface of the substrate 4. This direct access method allows the nozzle 7 to spray on the substrate 4 without obstacles without being hindered by the shell 6 during the spraying process. Since the substrate 4 directly passes through the through hole 3, the nozzle 7 can spray the substrate 4 more accurately. The nozzle 7 can move freely around the through hole 3 to adjust the spraying angle and position, so as to achieve precise coating on the surface of the substrate 4, and improve the accuracy and consistency of the spraying. The design of the through hole 3 avoids the friction and resistance between the substrate 4 and the shell 6, making the spraying process smoother. This ensures that the spraying material is evenly covered on the surface of the substrate 4, avoiding uneven coating or damage caused by friction. The substrate 4 is directly sprayed by the nozzle 7 in the shell 6, which can improve production efficiency. The nozzle 7 can directly spray the substrate 4 without additional operating steps or equipment, saving production time and cost and improving production efficiency. The through hole 3 design makes the loading and unloading of the substrate 4 simpler and more convenient.The operator can easily insert or remove the substrate 4 through the through hole 3 without significantly disassembling or adjusting the spraying mechanism, which saves operation time and improves operation efficiency. A nozzle 8 is provided on one side of the shell 6, and nozzles 7 are evenly provided on the nozzle 8. The nozzles 7 are evenly distributed on the nozzle 8, and the position of the nozzles 7 corresponds to the position of the substrate 4. The nozzles 7 are evenly distributed on the nozzle 8, ensuring that the spraying material can evenly cover the entire surface of the substrate 4. Such a design can avoid uneven spraying or leakage, and improve the quality and consistency of spraying. The evenly distributed nozzles 7 ensure the effective use of the spraying material. The position of each nozzle 7 corresponds to the position of the substrate 4, and the spraying material can be accurately sprayed to the target area of ​​the substrate 4, reducing the waste of the spraying material and saving production costs. The nozzles 7 are evenly distributed and correspond to the position of the substrate 4, making the entire spraying process more efficient. The operator does not need to adjust the position of the nozzle 7 or the spraying parameters too much, which reduces the operation time and improves production efficiency. The position of the nozzle 7 corresponds to the position of the substrate 4, ensuring that the spray material is accurately sprayed on the target area of ​​the substrate 4. This design ensures the accuracy of spraying, avoids spraying deviation or dislocation, and improves the quality and consistency of the product. The uniformly distributed nozzles 7 and the design corresponding to the position of the substrate 4 reduce the need for manual intervention. Once the spraying parameters are set, the operator can easily perform the spraying operation, reducing the impact of human factors on the production process and improving the stability and reliability of production. The side of the limit frame 2 away from the nozzle 7 is equipped with a photoelectric sensor 5. The photoelectric sensor 5 is used to monitor the substrate 4 at the inner edge of the limit groove 1 of the limit frame 2, and then monitor the position of the substrate 4 to prevent the substrate 4 from deflecting. The photoelectric sensor 5 can accurately monitor the substrate 4 at the inner edge of the limit groove 1 of the limit frame 2. Such monitoring can obtain the position information of the substrate 4 in real time, ensuring that the substrate 4 maintains the correct position during the spraying process, thereby ensuring the accuracy and consistency of the spraying. If the substrate 4 deflects during the spraying process, it may cause uneven distribution of the spray material, thereby affecting the quality and appearance of the coating. By monitoring the position of the substrate 4 through the photoelectric sensor 5, the deflection of the substrate 4 can be discovered and corrected in time, quality problems caused by it can be prevented, and production efficiency and product quality can be improved. By monitoring the position of the substrate 4 in real time through the photoelectric sensor 5, the deflection of the substrate 4 caused by human negligence or misoperation can be avoided, the errors that may occur in the production process can be reduced, and the reliability and stability of production can be improved. By preventing the substrate 4 from deflecting, the stability and accuracy of the substrate 4 during the spraying process can be ensured, thereby avoiding the waste of spraying and production downtime caused by the deflection of the substrate 4.This helps to improve the utilization rate of the equipment, increase production efficiency and output. A liquid collecting tank 9 is provided at the bottom end of the shell 6, and a connecting pipe is provided at the liquid collecting tank 9. The spraying material in the liquid collecting tank 9 flows back to the spraying equipment through the connecting pipe for reuse. The unused spraying material in the spraying process flows back to the spraying equipment, which can effectively utilize resources. This recycling and reuse practice reduces material waste, reduces production costs, and reduces the demand for raw materials, which is conducive to resource conservation and sustainable utilization. By returning the unused spraying material to the spraying equipment for reuse, the generation of waste can be reduced and the negative impact on the environment can be reduced. This helps to reduce pollution and resource consumption, protect the environment, and conform to the concept of sustainable development. The cost of spraying materials usually accounts for a considerable proportion of the production process. By recycling and reusing unused spraying materials, the procurement cost of raw materials can be saved. In addition, reducing the cost of waste disposal also helps to reduce production costs and improve the competitiveness of enterprises. There is no need to frequently replace the spraying material, but the unused material can be continued to be used by reflux, which helps to improve production efficiency. This can reduce downtime, improve equipment utilization, increase production output, and improve the operating efficiency of the production line. The reflow and reuse of spray materials simplifies the process of waste disposal and cleaning. Managers do not have to spend extra time and energy on waste disposal, but can focus more resources on production activities, improving management efficiency.

[0058] When the spray coating mechanism prepared for a large-size curved display based on Example 1 is used:

[0059] Precise spraying position control: The spraying position is crucial for the preparation of displays. Through the combination of the limit frame 2, the limit groove 1 and the photoelectric sensor 5, the mechanism can accurately control the position of the substrate 4. The limit frame 2 is provided with a limit groove 1, and the substrate 4 is placed in the limit groove 1, while the photoelectric sensor 5 monitors the edge position of the substrate 4 in the limit groove 1. This design ensures that the substrate 4 maintains an accurate position during the spraying process, avoiding inaccurate or misaligned spraying caused by position offset.

[0060] Uniform distribution of nozzles 7: Uniform distribution of nozzles 7 is one of the key factors to ensure that the spraying material uniformly covers the surface of the substrate 4. In this mechanism, nozzles 7 are evenly arranged on the nozzle pipe 8, and the positions of these nozzles 7 correspond to the positions of the substrate 4. This design can ensure that the spraying material is evenly released at the nozzles 7, so that the coating forms a uniform thickness and quality on the surface of the substrate 4, improving the visual effect and performance stability of the display.

[0061] Recycling of spraying materials: During the spraying process, a portion of the spraying materials are often not used. If these materials are wasted, it will increase production costs and have a negative impact on the environment. Therefore, the design of the liquid collecting tank 9 and the connecting pipe can effectively recycle the unused spraying materials during the spraying process. These materials flow back to the spraying equipment through the connecting pipe for reuse, thereby reducing material waste, reducing production costs, and being beneficial to environmental protection.

[0062] Simple and compact structure: The mechanism is simple and compact in design, with a clear structure and is easy to install and maintain. The key components such as the limit frame 2, the nozzle 7, the nozzle 8, and the photoelectric sensor 5 are reasonably arranged and easy to operate, so that the operator can easily adjust and maintain the equipment. This simple and compact structural design helps to improve production efficiency and work efficiency, and reduces failures and maintenance time during equipment operation.

[0063] The above description is only a preferred embodiment of the utility model and does not impose any form of limitation on the utility model. Any ordinary technician in the industry can smoothly implement the utility model as shown in the drawings of the specification and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the utility model using the technical content disclosed above are all equivalent embodiments of the utility model. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the utility model are still within the protection scope of the technical solution of the utility model.

Claims

1. A spray coating mechanism for preparing a large-size curved display, characterized in that: The invention comprises a limiting frame (2), a substrate (4), an outer shell (6) and a nozzle (8), wherein the limiting frame (2) is installed inside the outer shell (6), a notch (10) is provided on the limiting frame (2), a limiting groove (1) is provided inside the limiting frame (2), a substrate (4) is placed on the limiting frame (2) through the limiting groove (1), a nozzle (8) is provided on one side of the outer shell (6), nozzles (7) are evenly provided on the nozzle (8), a photoelectric sensor (5) is installed on the side of the limiting frame (2) away from the nozzle (7), and a liquid collecting tank (9) is provided at the bottom end of the outer shell (6).

2. A spray coating mechanism for preparing a large-size curved display according to claim 1, characterized in that: The shell (6) is provided with a through hole (3), and the substrate (4) passes through the through hole (3) of the shell (6).

3. The spray coating mechanism for preparing a large-size curved display according to claim 1, characterized in that: The nozzles (7) are evenly distributed on the nozzle pipe (8), and the positions of the nozzles (7) correspond to the positions of the substrate (4).

4. The spray coating mechanism for preparing a large-size curved display according to claim 1, characterized in that: The notch (10) is located on the side of the limiting frame (2) away from the spray head (7), so as to facilitate the spraying material gathered in the limiting frame (2) to flow to the liquid collecting tank (9).

5. The spray coating mechanism for preparing a large-size curved display according to claim 1, characterized in that: The liquid collecting tank (9) is provided with a connecting pipe, and the spraying material in the liquid collecting tank (9) flows back to the spraying equipment through the connecting pipe so as to be reused.

6. The spray coating mechanism for preparing a large-size curved display according to claim 1, characterized in that: The photoelectric sensor (5) is used to monitor the substrate (4) being located at the inner edge of the limiting groove (1) of the limiting frame (2), thereby monitoring the position of the substrate (4) to prevent the substrate (4) from being deflected.