Spraying film-forming device and method for substrate

Abstract

The embodiment of the invention provides a spraying and film-forming device and method for a substrate. The device comprises a spraying device with an inner cavity; the two groups of lifting doors are vertically arranged in an inner cavity of the spraying device and divide the inner cavity of the spraying device into a preheating buffer section, a medium-temperature spraying section and a heat preservation buffer section in sequence; the first roller conveying line is horizontally arranged in the preheating buffer section; the second roller conveying line is horizontally arranged in the medium-temperature spraying section; the third roller conveying line is horizontally arranged in the heat preservation buffering section; the infrared heating devices are respectively arranged in the preheating buffer section and the heat preservation buffer section; the oil bath heating plate is arranged above the second roller conveying line; the spraying and aerial fog collecting device is arranged above the oil bath heating plate; the horizontal pushing device is arranged in the inner cavity of the spraying device; the method can ensure that the temperature of the substrate is stable and consistent when the substrate enters and exits from the medium-temperature spraying section, and the coating quality problem caused by temperature fluctuation is avoided.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of spraying or atomization technology, and more particularly to a device and method for spraying and forming a film on a substrate. Background Art

[0002] In the production process of photovoltaic panels, in order to improve the photovoltaic conversion efficiency and weather resistance of the panels, it is usually necessary to coat the surface of the substrate. Traditional spin coating and inkjet printing methods have problems with inaccurate temperature control and poor spraying uniformity during large-scale production. It is often difficult to ensure the uniformity of the coating, resulting in problems such as inconsistent film thickness, low material utilization, and low production efficiency. Equipment with ultrasonic spraying function cannot operate stably in high-temperature environments, resulting in unstable adhesion and quality of the coating; some equipment is prone to nozzle clogging and inconsistent spraying thickness during the spraying process, affecting the consistency and reliability of the product; moreover, the existing spraying process often results in a large amount of paint waste, increasing production costs. Summary of the Invention

[0003] The technical problem to be solved by the embodiments of the present invention is to provide a spray film forming device and method for a substrate, which can ensure that the temperature of the substrate is stable and consistent when entering and exiting the medium-temperature spraying section, thereby avoiding coating quality problems caused by temperature fluctuations.

[0004] To solve the above technical problems, the technical solutions of the embodiments of the present invention are as follows:

[0005] A spray film forming device for a substrate, comprising:

[0006] A spraying device having an inner cavity;

[0007] Two sets of lifting doors are vertically arranged in the inner cavity of the spraying device, and the lifting doors divide the inner cavity of the spraying device into a preheating buffer section, a medium-temperature spraying section and a heat preservation buffer section in sequence;

[0008] A first roller conveyor line is horizontally arranged in the preheating buffer section;

[0009] The second roller conveyor line is horizontally arranged in the medium temperature spraying section;

[0010] A third roller conveyor line is horizontally arranged in the heat preservation buffer section;

[0011] Infrared heating devices are respectively arranged in the preheating buffer section and the heat preservation buffer section, for performing preheating buffer and heat preservation buffer on the substrate;

[0012] An oil bath heating plate provided above the second roller conveyor line is used to uniformly heat the substrate;

[0013] A spraying and aerosol collecting device is provided above the oil bath heating plate, for spraying the solution on the substrate and collecting the aerosol generated by the spraying;

[0014] A horizontal pushing device provided in the inner cavity of the spraying device is used to push the substrate horizontally;

[0015] A controller electrically connected to the first roller conveyor line, the second roller conveyor line, the third roller conveyor line and the horizontal pushing device is used to determine the start and stop times of the first roller conveyor line, the second roller conveyor line and the third roller conveyor line according to the pushing speed of the horizontal pushing device, the position of the oil bath heating plate and the lengths of the preheating buffer section, the medium temperature spraying section and the insulation buffer section.

[0016] Optionally, the infrared heating device comprises:

[0017] A first infrared heating device provided above the first roller conveyor line is used to preheat and buffer the substrate from the top;

[0018] The second infrared heating device is provided below the first roller conveyor line and is used to preheat and buffer the substrate from the bottom;

[0019] The third infrared heating device is located above the third roller conveyor line and is used to keep the substrate warm from the top.

[0020] The fourth infrared heating device is arranged below the third roller conveyor line and is used for heat preservation and buffering of the substrate from the bottom.

[0021] Optionally, the infrared heating device comprises:

[0022] Fixing the first infrared heating device to a first hanging rope on the top of the spraying device;

[0023] Fixing the second infrared heating device to the first bracket at the bottom of the spraying device;

[0024] Fixing the third infrared heating device to the second hanging rope on the top of the spraying device;

[0025] The fourth infrared heating device is fixed to the second bracket at the bottom of the spraying device.

[0026] Optionally, the oil bath heating plate is provided with a plurality of sliding balls for cooperating with the horizontal pushing device to push the substrate on the oil bath heating plate;

[0027] Wherein, the oil bath heating plate is connected to the liquid storage tank through multiple pipelines.

[0028] Optionally, connecting plates are provided at both ends of the oil bath heating plate, respectively, for cooperating with the horizontal pushing device to push the substrate onto and off the oil bath heating plate.

[0029] Optionally, the spraying and aerosol collecting device comprises:

[0030] A collecting hood provided above the oil bath heating plate, for collecting the aerosol generated by spraying;

[0031] a first telescopic rod vertically arranged between the collecting hood and the top of the spraying device, for driving the collecting hood toward or away from the oil bath heating plate;

[0032] An exhaust hose vertically arranged between the collection hood and the top of the spraying device, for discharging the collected aerosol;

[0033] The nozzle provided in the collecting hood is used to spray the solution onto the substrate on the oil bath heating plate;

[0034] A liquid-conducting hose vertically arranged between the collecting hood and the top of the spraying device is used to convey the solution to the spray head;

[0035] The nozzle comprises a plurality of rows of nozzles, a nozzle bracket for mounting the nozzles and a nozzle mounting seat for mounting the nozzle bracket. The nozzle mounting seat drives the nozzles to move vertically, and the nozzle bracket drives the nozzles to move horizontally.

[0036] Optionally, the horizontal pushing device includes:

[0037] Two sets of guide rails are horizontally arranged at the bottom of the inner cavity of the spraying device, and the two sets of guide rails are respectively arranged close to the edge of the inner cavity of the spraying device;

[0038] A slider provided on the guide rail, used for sliding horizontally on the guide rail;

[0039] A sliding bracket vertically arranged on the two sliding blocks, the sliding bracket comprising two vertically arranged support plates and a connecting plate horizontally arranged to connect the two support plates;

[0040] The connecting plate is provided with a plurality of contact points for contacting the substrate;

[0041] The guide rail drives the slider to drive the sliding bracket to move horizontally, and the contact point pushes the substrate to move horizontally.

[0042] Optionally, the lifting door includes:

[0043] A first door panel provided at the upper half of the inner cavity of the spraying device, for sealing the upper half of the inner cavity of the spraying device;

[0044] A second door panel is provided at the lower half of the inner cavity of the spraying device, and a passage space is left between the second door panel and both sides of the inner cavity of the spraying device and the first door panel to allow the horizontal pushing device and the substrate to pass through;

[0045] a second telescopic rod vertically disposed on the back of the first door panel, wherein the tail end of the second telescopic rod is fixedly connected to the back of the first door panel;

[0046] a movable door panel provided on the back of the first door panel, the movable door panel being fixedly connected to the head end of the second telescopic rod;

[0047] The second telescopic rod is extended and retracted to drive the movable door panel, thereby sealing the passage space between the second door panel and the first door panel.

[0048] Optionally, a plurality of bases are provided at the bottom of the spraying device.

[0049] An embodiment of the present invention further provides a method for spraying and forming a film on a substrate, which is applied to the spraying device described above, and the method includes:

[0050] Obtain the pushing speed of the horizontal pushing device, the position of the oil bath heating plate, and the lengths of the preheating buffer section, the medium-temperature spraying section, and the insulation buffer section;

[0051] Determining the conveying speeds of the first roller conveyor line, the second roller conveyor line, and the third roller conveyor line according to the pushing speed of the horizontal pushing device;

[0052] determining the start and stop times of the first roller conveyor line according to the length of the preheating buffer section and the conveying speed of the first roller conveyor line;

[0053] Determine the start and stop time of the second roller conveyor line according to the length of the medium-temperature spraying section, the position of the oil bath heating plate, the expected spraying time and the conveying speed of the second roller conveyor line;

[0054] The start and stop times of the third roller conveyor line are determined according to the length of the heat-insulating buffer section and the conveying speed of the third roller conveyor line.

[0055] The above solution of the embodiment of the present invention has at least the following beneficial effects:

[0056] The above-mentioned solution of the embodiment of the present invention, by providing independent preheating and insulation buffer sections, combined with an infrared heating device, can precisely preheat and maintain the substrate temperature, ensuring a stable and consistent substrate temperature as it enters and exits the medium-temperature spraying section, thus avoiding coating quality issues caused by temperature fluctuations, which is difficult to achieve with traditional spin coating and inkjet printing methods. Furthermore, the large, integrated oil bath heating plate, with its large cross-sectional oil path area, high density, and excellent flatness, provides uniform contact with the substrate, further ensuring temperature consistency during the spraying process.

[0057] The spraying and aerosol collection device can accurately control the spraying process to ensure uniform coating on the substrate surface.

[0058] Three sets of roller conveyor lines and horizontal pushing devices are set up, and the start and stop time of the roller conveyor line is determined by the controller according to the pushing speed, the position of the oil bath heating plate and the length of each section, realizing the automatic and precise transportation of the substrate, greatly improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 1 is a schematic structural diagram of a spray film forming device for a substrate according to an embodiment of the present invention;

[0060] Figure 2 1 is a schematic side structural diagram of a substrate spray film forming device according to an embodiment of the present invention;

[0061] Figure 3 Schematic diagram of the structure of a nozzle of a spray coating device for forming a film on a substrate according to an embodiment of the present invention;

[0062] Figure 4 It is a flow chart of a method for spraying film formation on a substrate according to an embodiment of the present invention.

[0063] Among them, 1. Preheating buffer section; 11. First roller conveyor line; 121. First infrared heating device; 122. Second infrared heating device; 13. First hanging rope; 14. First bracket; 2. Medium temperature spraying section; 21. Second roller conveyor line; 22. Oil bath heating plate; 23. Sliding ball; 24. Collecting cover; 25. First telescopic rod; 26. Exhaust hose; 27. Liquid guide hose; 28. Nozzle; 281. Nozzle mounting seat; 282. Nozzle bracket; 283. Nozzle; 2 9. Connecting plate; 3. Insulation buffer section; 31. Third roller conveyor line; 321. Third infrared heating device; 322. Fourth infrared heating device; 33. Second hanging rope; 34. Second bracket; 41. First lifting door; 411. First door panel; 412. Second door panel; 413. Movable door panel; 414. Second telescopic rod; 415. Passing space; 42. Second lifting door; 5. Base plate; 6. Guide rail; 7. Slider; 8. Sliding bracket; 9. Contact point; 10. Base. DETAILED DESCRIPTION

[0064] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0065] like Figure 1 、 Figure 2 As shown, an embodiment of the present invention provides a spray film forming device for a substrate, comprising:

[0066] A spraying device having an inner cavity;

[0067] Two sets of lifting doors (a first lifting door 41 and a second lifting door 42) are vertically arranged in the inner cavity of the spraying device, and the lifting doors divide the inner cavity of the spraying device into a preheating buffer section 1, a medium-temperature spraying section 2, and a heat preservation buffer section 3 in sequence;

[0068] A first roller conveyor line 11 is horizontally arranged in the preheating buffer section 1;

[0069] A second roller conveyor line 21 is horizontally arranged in the medium-temperature spraying section 2;

[0070] A third roller conveyor line 31 is horizontally arranged in the heat preservation buffer section 3;

[0071] Infrared heating devices are respectively provided in the preheating buffer section 1 and the heat preservation buffer section 3, for performing preheating buffering and heat preservation buffering on the substrate 5;

[0072] An oil bath heating plate 22 provided above the second roller conveyor line 21 is used to uniformly heat the substrate 5;

[0073] The spraying and aerosol collecting device is provided above the oil bath heating plate 22, and is used to spray the solution onto the substrate 5 and collect the aerosol generated by the spraying;

[0074] A horizontal pushing device provided in the inner cavity of the spraying device is used to push the substrate 5 horizontally;

[0075] The controller electrically connected to the first roller conveyor line 11, the second roller conveyor line 21, the third roller conveyor line 31 and the horizontal pushing device is used to determine the start and stop time of the first roller conveyor line 11, the second roller conveyor line 21 and the third roller conveyor line 31 according to the pushing speed of the horizontal pushing device, the position of the oil bath heating plate 22 and the length of the preheating buffer section 1, the medium temperature spraying section 2 and the insulation buffer section 3.

[0076] Specifically, the substrate 5 may include a rigid planar substrate (such as a glass substrate), a flexible substrate, or a slightly curved substrate.

[0077] In this example, by providing independent preheating buffer sections 1 and insulation buffer sections 3, in conjunction with an infrared heating device, substrate 5 can be accurately preheated and insulation buffered, ensuring that the substrate 5 maintains a stable and consistent temperature when entering and exiting the medium-temperature spraying section 2, thus avoiding coating quality issues caused by temperature fluctuations, which is difficult to achieve with traditional spin coating and inkjet printing methods. At the same time, the large-area integral oil bath heating plate 22 has a large oil path cross-sectional area, high arrangement density, and excellent flatness, and is in uniform contact with the substrate 5, which can further ensure the temperature consistency of the substrate 5 during the spraying process.

[0078] The spraying and aerosol collecting device can accurately control the spraying process to ensure that the surface coating of the substrate 5 is uniform.

[0079] Three sets of roller conveyor lines and horizontal pushing devices are set up, and the start and stop time of the roller conveyor line is determined by the controller according to the pushing speed, the position of the oil bath heating plate 22 and the length of each section, thereby realizing the automatic and precise conveying of the substrate 5 and greatly improving the production efficiency.

[0080] In an optional embodiment of the present invention, the infrared heating device includes:

[0081] The first infrared heating device 121 provided above the first roller conveyor line 11 is used to preheat and buffer the substrate 5 from the top;

[0082] The second infrared heating device 122 provided below the first roller conveyor line 11 is used to preheat and buffer the substrate 5 from the bottom;

[0083] The third infrared heating device 321 provided above the third roller conveyor line 31 is used to provide thermal insulation and buffering for the substrate 5 from the top;

[0084] The fourth infrared heating device 322 provided below the third roller conveyor line 31 is used to provide thermal insulation and buffering for the substrate 5 from the bottom.

[0085] The infrared heating device comprises:

[0086] Fixing the first infrared heating device 121 to the first hanging rope 13 on the top of the spraying device;

[0087] Fix the second infrared heating device 122 to the first bracket 14 at the bottom of the spraying device;

[0088] Fix the third infrared heating device 321 to the second hanging rope 33 on the top of the spraying device;

[0089] The fourth infrared heating device 322 is fixed to the second bracket 34 at the bottom of the spraying device.

[0090] In this example, a first infrared heating device 121 and a second infrared heating device 122 are respectively positioned above and below the first roller conveyor line 11, enabling simultaneous preheating and buffering of the substrate 5 from both the top and bottom. Similarly, a third infrared heating device 321 above the third roller conveyor line 31 and a fourth infrared heating device 322 below the third roller conveyor line 31 provide comprehensive thermal insulation and buffering for the substrate 5. This synchronized top-to-bottom heating method significantly improves the uniformity of heating of the substrate 5. Compared to heating from only one side, it more effectively avoids deformation or temperature inconsistency of the substrate 5 due to uneven heating, further improving the accuracy of temperature control and thus better ensuring coating quality.

[0091] The hanging rope design allows for flexible installation of the top infrared heating device, facilitating precise alignment and heating of the substrate 5 while also minimizing overhead space usage. The bracket mounting system provides stable support for the bottom infrared heating device, preventing it from shifting due to vibrations during operation. This ensures stable and continuous heating, thereby enhancing the reliability of the entire spraying system.

[0092] In an optional embodiment of the present invention, the oil bath heating plate 22 is provided with a plurality of sliding balls 23 for cooperating with the horizontal pushing device to push the substrate 5 on the oil bath heating plate 22;

[0093] The oil bath heating plate 22 is connected to the liquid storage tank via multiple pipelines, and the required pipelines can be switched according to needs.

[0094] Connecting plates 29 are respectively provided at both ends of the oil bath heating plate 22 for cooperating with the horizontal pushing device to push the substrate 5 onto and off the oil bath heating plate 22 .

[0095] In this example, the multiple sliding balls 23 provided on the oil bath heating plate 22 significantly reduce the friction between the substrate 5 and the oil bath heating plate 22. When the horizontal pushing device pushes the substrate 5, the sliding balls 23 enable the substrate 5 to move more smoothly on the oil bath heating plate 22, reducing resistance during the pushing process. This not only improves pushing efficiency but also reduces the risk of scratches or wear on the surface of the substrate 5 that may be caused by excessive friction, further ensuring the quality of the substrate 5 and providing a better foundation for subsequent coating processing.

[0096] The connecting plates 29 at both ends of the oil bath heating plate 22 serve as a transition and guide. When the horizontal pushing device pushes the substrate 5 onto the oil bath heating plate 22, the connecting plates 29 enable the substrate 5 to smoothly transition from other conveying structures to the oil bath heating plate 22, preventing the substrate 5 from getting stuck or tilting due to height differences or positional deviations. Similarly, when pushing the substrate 5 off the oil bath heating plate 22, the connecting plates 29 ensure that the substrate 5 is smoothly pushed down and enters the subsequent conveying process, greatly improving the stability of the substrate 5 throughout the pushing process and ensuring the smoothness and reliability of the equipment operation.

[0097] The sliding ball 23 and the connecting plate 29 cooperate with the horizontal pushing device to better integrate the oil bath heating plate 22 into the entire substrate 5 transportation and processing process.

[0098] like Figure 3 As shown, in an optional embodiment of the present invention, the spraying and aerosol collection device includes:

[0099] A collecting hood 24 is provided above the oil bath heating plate 22 for collecting the aerosol generated by spraying;

[0100] A first telescopic rod 25 is vertically provided between the collecting hood 24 and the top of the spraying device, and is used to drive the collecting hood 24 toward or away from the oil bath heating plate 22;

[0101] An exhaust hose 26 is vertically arranged between the collection hood 24 and the top of the spraying device, and is used to discharge the collected mist;

[0102] The nozzle 28 provided in the collecting cover 24 is used to spray the solution onto the substrate 5 on the oil bath heating plate 22;

[0103] A liquid-conducting hose 27 is vertically arranged between the collecting cover 24 and the top of the spraying device, and is used to convey the solution to the spray head 28;

[0104] The nozzle 28 includes multiple rows of nozzles 283, a nozzle bracket 282 for mounting the nozzles 283, and a nozzle mounting base 281 for mounting the nozzle bracket 282. The nozzle mounting base 281 drives the nozzles 283 to move vertically, and the nozzle bracket 282 drives the nozzles 283 to move horizontally.

[0105] Specifically, the nozzle 28 may be a highly atomized glass nozzle, the exhaust hose 26 may be connected to an exhaust fan and an exhaust gas treatment device, and the liquid guiding hose 27 may be connected to a solution supply device.

[0106] In this example, the use of a high-atomization glass nozzle significantly improves the atomization effect, allowing the solution to be sprayed more evenly onto the surface of substrate 5, ensuring the uniformity and quality of the coating. The nozzle 28 is installed within the collection hood 24, allowing spraying to be performed in a relatively closed environment, reducing external factors from interfering with the spraying process and further ensuring the stability of the spraying effect.

[0107] The collection hood 24, in conjunction with the exhaust hose 26, effectively collects the aerosol generated during the spraying process. The exhaust hose 26, connected to an exhaust fan and an exhaust gas treatment device, promptly discharges and treats the collected aerosol, preventing its accumulation within the equipment and potentially corroding it. It also prevents leakage of the aerosol from harming the environment and the health of operators, thus complying with environmental protection and safe production requirements.

[0108] The arrangement of the first telescopic rod 25 enables the collection hood 24 to be moved closer to or further away from the oil bath heating plate 22 as needed. When spraying substrates 5 of different sizes or performing equipment maintenance, the position of the collection hood 24 can be flexibly adjusted, thereby improving the adaptability and operational convenience of the equipment.

[0109] The liquid-conducting hose 27 is connected to the solution supply device, which can stably deliver solution to the spray head 28, ensuring the continuity of the spraying process. This design ensures that the spray head 28 always has sufficient solution for spraying during long production processes, avoiding spraying interruptions or coating quality issues caused by insufficient solution supply, further improving production efficiency and product quality.

[0110] In an optional embodiment of the present invention, the horizontal pushing device includes:

[0111] Two sets of guide rails 6 are horizontally arranged at the bottom of the inner cavity of the spraying device, and the two sets of guide rails 6 are respectively arranged close to the edge of the inner cavity of the spraying device;

[0112] A slider 7 provided on the guide rail 6, for sliding horizontally on the guide rail 6;

[0113] A sliding bracket 8 vertically arranged on the two sliders 7, the sliding bracket 8 comprising two vertically arranged support plates and a connecting plate horizontally arranged to connect the two support plates;

[0114] The connecting plate is provided with a plurality of contact points 9 for contacting the substrate 5;

[0115] The guide rail 6 drives the slider 7 to drive the sliding bracket 8 to move horizontally, and the contact point 9 pushes the substrate 5 to move horizontally.

[0116] In this example, the horizontal pushing device, through the cooperation of two sets of guide rails 6 and sliders 7, provides a stable and precise movement track for the sliding bracket 8. The guide rails 6 drive the sliders 7 to drive the sliding bracket 8 horizontally, making the pushing process of the substrate 5 smooth and controllable, effectively avoiding deviation or jamming during the pushing process, ensuring that the substrate 5 can move accurately within the device according to the predetermined path, and improving the stability and reliability of the entire production process.

[0117] The connecting plate is provided with multiple contact points 9 for contact with the substrate 5. Compared with a large-area contact, the contact area between the pushing device and the substrate 5 is greatly reduced. This not only reduces the heat transfer caused by contact during the pushing process, reducing the impact on the temperature uniformity of the substrate 5, but also reduces the risk of damage to the substrate 5 surface due to contact friction, helping to maintain the quality of the substrate 5 during the processing process.

[0118] The two groups of guide rails 6 are arranged close to the edge of the inner cavity of the spraying device, which cleverly utilizes the edge space inside the device. It does not affect the normal operation of other components such as the roller conveyor line, the oil bath heating plate 22, etc., and provides installation space for the horizontal pushing device, making the internal layout of the entire spraying device more reasonable and compact, enhancing the compatibility between the various devices, and helping to improve the operating efficiency of the overall equipment.

[0119] In an optional embodiment of the present invention, the lifting door includes:

[0120] A first door panel 411 provided at the upper half of the inner cavity of the spraying device is used to seal the upper half of the inner cavity of the spraying device;

[0121] A second door panel 412 is provided at the lower half of the inner cavity of the spraying device. A passage space 415 is left between the second door panel 412 and both sides of the inner cavity of the spraying device and the first door panel 411 to allow the horizontal pushing device and the substrate 5 to pass through.

[0122] A second telescopic rod 414 is vertically provided on the back of the first door panel 411, and the tail end of the second telescopic rod 414 is fixedly connected to the back of the first door panel 411;

[0123] A movable door panel 413 is provided on the back of the first door panel 411, and the movable door panel 413 is fixedly connected to the head end of the second telescopic rod 414;

[0124] The second telescopic rod 414 is telescopically moved to drive the movable door panel 413 to seal the passage space 415 between the second door panel 412 and the first door panel 411 .

[0125] In this example, the unique structural design of the lifting door effectively utilizes the space in the inner cavity of the spray device through the cooperation of the first door panel 411 and the second door panel 412. The passage space 415 reserved between the second door panel 412 and the two sides of the inner cavity of the spray device and the first door panel 411 can facilitate the smooth passage of the horizontal pushing device and the substrate 5. At the same time, when not transporting, the first door panel 411 can seal the upper half of the inner cavity of the spray device to reduce heat loss and external interference. When the substrate 5 is transported, the second telescopic rod 414 drives the movable door panel 413 to flexibly seal or open the passage space 415 between the second door panel 412 and the first door panel 411. It opens when the substrate 5 passes through to ensure its smooth passage; it is sealed after passing through to maintain the independence of each chamber, prevent heat, aerosol, etc. from running around between different functional sections, and help maintain the stability of the respective environments of the preheating buffer section 1, the medium-temperature spraying section 2 and the insulation buffer section 3, thereby improving the quality and stability of the entire coating treatment process.

[0126] This lift-door structure ensures better sealing of all areas within the spraying apparatus. During spraying operations in the medium-temperature spray section 2, the well-sealed chamber effectively prevents solution mist from escaping to other areas. This not only protects other equipment components from aerosol corrosion, extending the equipment's service life, but also prevents aerosol from affecting the temperature environment of the preheating buffer section 1 and the insulation buffer section 3. This ensures stable operation of each functional section, improves the reliability and stability of the equipment, and provides a stable environment for high-quality substrate 5 coating.

[0127] Since the lifting door can flexibly adjust the sealing state of the through space 415, the device has better versatility for substrates 5 of different sizes. When facing size changes, the transportation requirements of substrates 5 of different specifications can be met by adjusting the opening and closing timing and state of the movable door plate 413.

[0128] Specifically, a plurality of bases 10 are provided at the bottom of the spraying device.

[0129] In this embodiment of the present invention, infrared heating devices are installed above and below the first and third roller conveyor lines 31, respectively, to simultaneously preheat and maintain the substrate 5 from the top and bottom. This synchronized heating method significantly improves the uniformity of heating on the substrate 5, preventing deformation or temperature inconsistencies caused by uneven heating, improving temperature control accuracy, and ensuring coating quality.

[0130] The multiple sliding balls 23 on the oil bath heating plate 22 significantly reduce the friction between the substrate 5 and the oil bath heating plate 22. When the horizontal pushing device pushes the substrate 5, the sliding balls 23 make the substrate 5 move more smoothly, reduce pushing resistance, improve pushing efficiency, and reduce the risk of scratching or wearing the surface of the substrate 5 due to excessive friction, laying a good foundation for subsequent coating processing.

[0131] The connecting plates 29 at both ends of the oil bath heating plate 22 serve as a transition and guide. When the horizontal pushing device pushes the substrate 5 onto or off the oil bath heating plate 22, the connecting plates 29 allow the substrate 5 to transition smoothly, avoiding jamming or tilting due to height differences or positional deviations. This improves the stability of the substrate 5 throughout the pushing process, ensuring smooth and reliable operation of the equipment.

[0132] The sliding ball 23 and the connecting plate 29 work in conjunction with the horizontal push mechanism to better integrate the oil bath heating plate 22 into the conveying and handling process of the substrate 5. This optimizes the transfer process of the substrate 5 between different areas, allowing each component of the device to work more closely together, improving the operating efficiency and stability of the entire spraying device, and contributing to efficient and high-quality coating of the substrate 5.

[0133] The use of a high-atomization glass nozzle significantly improves the atomization effect, allowing the solution to be evenly sprayed onto the surface of the substrate 5, ensuring coating uniformity and quality. The nozzle 28 is installed within the collection hood 24, spraying in a relatively closed environment, reducing external factors from interfering with the spraying process and ensuring the stability of the spraying effect.

[0134] The collection hood 24 works in conjunction with the exhaust hose 26 to effectively collect the aerosol generated by the spraying process. The exhaust hose 26 is connected to an exhaust fan and an exhaust gas treatment device to promptly discharge and treat the aerosol, preventing aerosol accumulation and corrosion inside the equipment and preventing aerosol leakage that could harm the environment and operator health, thus complying with environmental protection and production safety requirements.

[0135] The first telescopic rod 25 can move the collecting hood 24 closer to or farther from the oil bath heating plate 22 as needed. When spraying substrates 5 of different sizes or performing equipment maintenance, the position of the collecting hood 24 can be flexibly adjusted, thereby improving the adaptability and operational convenience of the equipment.

[0136] The horizontal pushing device, which works with two sets of guide rails 6 and sliders 7, provides a stable and precise path for the sliding bracket 8. The guide rails 6 drive the sliders 7, which in turn drives the sliding bracket 8 horizontally. This ensures a smooth and controllable pushing process for the substrate 5, preventing deviation or jamming. This ensures that the substrate 5 moves accurately within the device along the predetermined path, enhancing the stability and reliability of the entire production process.

[0137] Multiple contact points 9 on the connecting plate contact the substrate 5, significantly reducing the contact area between the pushing device and the substrate 5 compared to a larger contact area. This reduces heat transfer during the pushing process, minimizing the impact on the temperature uniformity of the substrate 5, and reducing the risk of damage to the substrate 5 surface due to contact friction, thereby maintaining the quality of the substrate 5 during processing.

[0138] The two groups of guide rails 6 are arranged near the edge of the inner cavity of the spraying device, cleverly utilizing the internal edge space of the device, which neither affects the normal operation of other components nor provides installation space for the horizontal pushing device, making the internal layout of the entire spraying device more reasonable and compact, enhancing the compatibility between the various devices, and improving the overall equipment operation efficiency.

[0139] The lifting door cooperates with the first door panel 411 and the second door panel 412 to effectively utilize the inner cavity space of the spray device. The passage space 415 reserved between the second door panel 412 and the two sides of the inner cavity of the spray device and the first door panel 411 facilitates the smooth passage of the horizontal pushing device and the substrate 5. When not transporting, the first door panel 411 seals the upper half of the inner cavity of the spray device to reduce heat loss and external interference. When the substrate 5 is transported, the second telescopic rod 414 drives the movable door panel 413 to flexibly seal or open the passage space 415 between the second door panel 412 and the first door panel 411 to ensure the smooth passage of the substrate 5, maintain the independence of each chamber, prevent heat and aerosol from running around in different functional sections, and improve the quality and stability of the coating treatment process.

[0140] The lift-door structure ensures the tightness of all areas within the spraying apparatus. During spraying operations in the medium-temperature spray section 2, the well-sealed chamber effectively prevents solution mist from escaping to other areas, protecting other equipment components from mist corrosion, extending the equipment's service life, and preventing mist from affecting the temperature environment of the preheating buffer section 1 and the insulation buffer section 3. This ensures the stable operation of each functional section and provides a stable environment for high-quality coating of substrates 5.

[0141] like Figure 4As shown, an embodiment of the present invention further provides a method for spraying and forming a film on a substrate, which is applied to the spraying device as described above, and the method includes:

[0142] Step 301, obtaining the pushing speed of the horizontal pushing device, the position of the oil bath heating plate 22, and the lengths of the preheating buffer section 1, the medium temperature spraying section 2, and the heat preservation buffer section 3;

[0143] Step 302, determining the conveying speeds of the first roller conveyor line 11, the second roller conveyor line 21, and the third roller conveyor line 31 according to the pushing speed of the horizontal pushing device;

[0144] Step 303, determining the start and stop time of the first roller conveyor line 11 according to the length of the preheating buffer section 1 and the conveying speed of the first roller conveyor line 11;

[0145] Step 304 , determining the start and stop times of the second roller conveyor line 21 based on the length of the medium-temperature spraying section 2 , the position of the oil bath heating plate 22 , the expected spraying time, and the conveying speed of the second roller conveyor line 21 ;

[0146] Step 305 , determining the start and stop time of the third roller conveyor line 31 according to the length of the heat-insulating buffer section 3 and the conveying speed of the third roller conveyor line 31 .

[0147] Specifically, the method includes:

[0148] Step 3001, obtain the pushing speed v of the horizontal pushing device push , the position d of the oil bath heating plate 22 and the length L1 of the preheating buffer section 1, the length L2 of the medium temperature spraying section 2 and the length L3 of each section of the heat preservation buffer section 3;

[0149] Step 3002, according to v1=v2=v3=v push Determine the conveying speeds of the first roller conveyor line 11, the second roller conveyor line 21 and the third roller conveyor line 31,

[0150] Among them, v1 is the conveying speed of the first roller conveyor line 11, v2 is the conveying speed of the second roller conveyor line 21, v3 is the conveying speed of the third roller conveyor line 31, and v push is the pushing speed of the horizontal pushing device;

[0151] Step 3003, set the start time t of the first roller conveyor line 11 1-start =0;

[0152] Step 3004, according to t 1-stop = L1 / v1 determines the stopping time of the first roller conveyor line 11,

[0153] Among them, t 1-stopis the stopping time of the first roller conveyor line 11, L1 is the length of the preheating buffer section 1, and v1 is the conveying speed of the first roller conveyor line 11;

[0154] Step 3005, according to t 2-start =t 1-stop Determine the start time of the second roller conveyor line 21,

[0155] Among them, t 2-start is the start time of the second roller conveyor line 21, t 1-stop is the stop time of the first roller conveyor line 11;

[0156] Step 3006, according to t 2-stop =t 2-start +d / v2+t do +(L2-d) / v2 determines the stop time of the second roller conveyor line 21,

[0157] Among them, t 2-stop is the stopping time of the second roller conveyor line 21, t 2-start is the start time of the second roller conveyor line 21, d is the position of the oil bath heating plate 22, v2 is the conveying speed of the second roller conveyor line 21, t do is the expected spraying time, L2 is the length of the medium-temperature spraying section 2;

[0158] Step 3007, according to t 3-start =t 2-stop Determine the start time of the third roller conveyor line 31,

[0159] Among them, t 3-start is the start time of the third roller conveyor line 31, t 2-stop is the stop time of the second roller conveyor line 21;

[0160] Step 3008, according to t 3-stop =t 3-start +L3 / v3 determines the stop time of the third roller conveyor line 31,

[0161] Among them, t 3-stop is the stopping time of the third roller conveyor line 31, t 3-start is the start-up time of the third roller conveyor line 31 , L3 is the length of each section of the heat preservation buffer section 3 , and v3 is the conveying speed of the third roller conveyor line 31 .

[0162] In this example, the spray coating method accurately determines the conveying speed and start / stop times of the three roller conveyor lines based on the horizontal pusher speed, the position of the oil bath heating plate 22, and the length of each functional section. This coordinated operation of the roller conveyor lines and the horizontal pusher prevents substrates 5 from jamming, piling up, or becoming disconnected during conveyance, significantly improving the overall operating efficiency and stability of the equipment.

[0163] By precisely calculating the start and stop times of each roller conveyor line, the substrate 5 is guaranteed sufficient time to reach a stable temperature in the preheating buffer section 1, laying a solid foundation for subsequent spraying. In the medium-temperature spraying section 2, the start and stop times of the second roller conveyor line 21 are determined based on the position of the oil bath heating plate 22 and the expected spraying time. This allows the substrate 5 to be sprayed under optimal conditions, ensuring coating uniformity and quality. In the heat-insulating buffer section 3, appropriate start and stop times are set to maintain a stable temperature for the substrate 5, preventing coating defects caused by sudden temperature fluctuations.

[0164] Precise conveying speed and start-stop control reduce mechanical wear on roller conveyor lines and related equipment. This prevents equipment impacts caused by speed mismatches or frequent starts and stops, extending equipment life and reducing maintenance costs. In actual production, improved equipment reliability means fewer equipment failures, reduced production interruptions due to equipment maintenance, ensuring production continuity, and reducing production risks for the company.

[0165] The calculation logic in the method is highly flexible. When replacing substrates 5 of different specifications or adjusting the production process, it is only necessary to input new parameters such as the horizontal pushing speed and the length of each functional section to quickly replan the operating parameters of the roller conveyor line to adapt to diverse production needs.

[0166] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "example," "specific implementation," or "some implementations" means that a particular feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. Throughout this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0167] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A spray film forming device for a substrate, characterized in that: include: A spraying device having an inner cavity; Two sets of lifting doors are vertically arranged in the inner cavity of the spraying device, and the lifting doors sequentially separate the inner cavity of the spraying device into a preheating buffer section (1), a medium-temperature spraying section (2), and a heat preservation buffer section (3); A first roller conveyor line (11) is horizontally arranged in the preheating buffer section (1); a second roller conveying line (21) horizontally arranged in the medium-temperature spraying section (2); a third roller conveyor line (31) horizontally arranged in the heat-insulating buffer section (3); Infrared heating devices are respectively arranged in the preheating buffer section (1) and the heat preservation buffer section (3), and are used to perform preheating buffering and heat preservation buffering on the substrate (5); An oil bath heating plate (22) provided above the second roller conveyor line (21) is used to uniformly heat the substrate (5); A spraying and mist collecting device is provided above the oil bath heating plate (22), and is used for spraying the solution on the substrate (5) and collecting the mist generated by the spraying; A horizontal pushing device provided in the inner cavity of the spraying device, for horizontally pushing the substrate (5); A controller electrically connected to the first roller conveyor line (11), the second roller conveyor line (21), the third roller conveyor line (31) and the horizontal pushing device is used to determine the start and stop times of the first roller conveyor line (11), the second roller conveyor line (21) and the third roller conveyor line (31) according to the pushing speed of the horizontal pushing device, the position of the oil bath heating plate (22) and the lengths of the preheating buffer section (1), the medium temperature spraying section (2) and the heat preservation buffer section (3).

2. The substrate spray film forming device according to claim 1, characterized in that: The infrared heating device comprises: A first infrared heating device (121) provided above the first roller conveyor line (11) is used for preheating and buffering the substrate (5) from the top; A second infrared heating device (122) provided below the first roller conveyor line (11) is used for preheating and buffering the substrate (5) from the bottom; A third infrared heating device (321) is provided above the third roller conveyor line (31) and is used to provide thermal insulation and buffering for the substrate (5) from the top; The fourth infrared heating device (322) is arranged below the third roller conveyor line (31) and is used to perform thermal insulation and buffering on the substrate (5) from the bottom.

3. The substrate spray film forming device according to claim 2, characterized in that: The infrared heating device comprises: Fixing the first infrared heating device (121) to a first hanging rope (13) on the top of the spraying device; Fixing the second infrared heating device (122) to the first bracket (14) at the bottom of the spraying device; Fixing the third infrared heating device (321) to the second hanging rope (33) on the top of the spraying device; The fourth infrared heating device (322) is fixed to the second bracket (34) at the bottom of the spraying device.

4. The substrate spray film forming device according to claim 1, characterized in that: The oil bath heating plate (22) is provided with a plurality of sliding balls (23) for cooperating with the horizontal pushing device to push the substrate (5) on the oil bath heating plate (22); Wherein, the oil bath heating plate (22) is connected to the liquid storage tank through multiple pipelines.

5. The substrate spray film forming device according to claim 4, characterized in that: Connecting plates (29) are respectively provided at both ends of the oil bath heating plate (22) for cooperating with a horizontal pushing device to push the substrate (5) up and down the oil bath heating plate (22).

6. The substrate spray film forming device according to claim 1, characterized in that: The spraying and aerosol collecting device comprises: A collecting hood (24) is provided above the oil bath heating plate (22) and is used to collect the aerosol generated by spraying; a first telescopic rod (25) vertically arranged between the collecting cover (24) and the top of the spraying device, for driving the collecting cover (24) to move closer to or away from the oil bath heating plate (22); an exhaust hose (26) vertically arranged between the collecting hood (24) and the top of the spraying device, for discharging the collected mist; A spray head (28) disposed in the collecting cover (24) is used to spray the solution onto the substrate (5) on the oil bath heating plate (22); a liquid-conducting hose (27) vertically arranged between the collecting cover (24) and the top of the spraying device, for conveying the solution to the spray head (28); The nozzle (28) comprises a plurality of rows of nozzles (283), a nozzle bracket (282) for mounting the nozzles (283), and a nozzle mounting seat (281) for mounting the nozzle bracket (282); the nozzle mounting seat (281) drives the nozzles (283) to move vertically, and the nozzle bracket (282) drives the nozzles (283) to move horizontally.

7. The substrate spray film forming device according to claim 1, characterized in that: The horizontal pushing device comprises: Two sets of guide rails (6) are horizontally arranged at the bottom of the inner cavity of the spraying device, and the two sets of guide rails (6) are respectively arranged close to the edge of the inner cavity of the spraying device; A slider (7) provided on the guide rail (6) and configured to slide horizontally on the guide rail (6); A sliding bracket (8) vertically arranged on the two sliders (7), the sliding bracket (8) comprising two vertically arranged support plates and a connecting plate horizontally arranged and connected to the two support plates; The connecting plate is provided with a plurality of contact points (9) for contacting the substrate (5); The guide rail (6) drives the slider (7) to drive the sliding bracket (8) to move horizontally, and the contact point (9) pushes the base plate (5) to move horizontally.

8. The substrate spray film forming device according to claim 1, characterized in that: The lifting door comprises: A first door panel (411) provided on the upper half of the inner cavity of the spraying device, used for sealing the upper half of the inner cavity of the spraying device; A second door panel (412) is provided at the lower half of the inner cavity of the spraying device, and a passage space (415) is reserved between the second door panel (412) and both sides of the inner cavity of the spraying device and the first door panel (411) to allow the horizontal pushing device and the substrate (5) to pass through; a second telescopic rod (414) vertically arranged on the back of the first door panel (411), wherein the tail end of the second telescopic rod (414) is fixedly connected to the back of the first door panel (411); A movable door panel (413) is provided on the back of the first door panel (411), wherein the movable door panel (413) is fixedly connected to the head end of the second telescopic rod (414); The second telescopic rod (414) is telescopically driven to drive the movable door panel (413), thereby sealing the passage space (415) between the second door panel (412) and the first door panel (411).

9. The substrate spray film forming device according to claim 1, characterized in that: A plurality of bases (10) are provided at the bottom of the spraying device.

10. A method for spraying film formation on a substrate, characterized in that: Applied to the spraying device according to any one of claims 1 to 9, the method comprises: Obtaining the pushing speed of the horizontal pushing device, the position of the oil bath heating plate (22), and the lengths of the preheating buffer section (1), the medium-temperature spraying section (2), and the heat preservation buffer section (3); Determining the conveying speeds of the first roller conveyor line (11), the second roller conveyor line (21), and the third roller conveyor line (31) according to the pushing speed of the horizontal pushing device; Determining the start and stop times of the first roller conveyor line (11) based on the length of the preheating buffer section (1) and the conveying speed of the first roller conveyor line (11); Determining the start and stop times of the second roller conveyor line (21) based on the length of the medium-temperature spraying section (2), the position of the oil bath heating plate (22), the expected spraying time, and the conveying speed of the second roller conveyor line (21); The start and stop times of the third roller conveyor line (31) are determined according to the length of the heat-insulating buffer section (3) and the conveying speed of the third roller conveyor line (31).

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