Silver nanowire spraying equipment and spraying method

Abstract

The invention belongs to the technical field of silver nanowire spraying, and provides silver nanowire spraying equipment and a silver nanowire spraying method, a spraying head is arranged on the upper portion in a shell through a three-axis moving shaft, on the basis, a box body and an air compressor are arranged on the lower portion in the shell in a split mode through a multi-degree-of-freedom moving spraying mode of the three-axis moving shaft, and the box body and the air compressor are arranged on the upper portion in the shell. A raw material storage tank is arranged on the box body; a stirrer is arranged on the raw material storage tank; silver nanowire suspension liquid in the raw material storage tank is stirred through the stirrer, the output silver nanowire suspension liquid can be more uniform and stable, and the box body, the air compressor and the shell are arranged in a split mode, so that the influence of vibration of the air compressor and the stirrer on the three-axis moving shaft and the heating base plate is avoided; meanwhile, through the arrangement of the heating substrate and the heating fan close to the heating substrate, the heating fan can enable the surface of the substrate to be heated uniformly, and the spraying uniformity and stability of the silver nanowire suspension liquid on the surface of the substrate are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of silver nanowire spraying, and in particular relates to a silver nanowire spraying device and a spraying method. Background Art

[0002] Silver nanowires have high ductility, high transmittance and excellent electrical properties, and are widely used in flexible electronic products such as touch screens, flexible displays, solar cells and other fields. Silver nanowire spraying technology is an advanced process widely used in the field of flexible electronic device manufacturing. By evenly spraying the silver nanowire suspension on the substrate surface, the preparation of silver nanowire conductive film can be achieved quickly, efficiently and at low cost.

[0003] During the preparation of the silver nanowire conductive film, whether the silver nanowire suspension can be evenly sprayed on the substrate surface determines the quality of the conductive film product. In the current equipment used for silver nanowire spraying, the paint box and power source are all arranged on an integral frame. During the spraying process, the vibration of the paint box and power source will cause the nozzle and the substrate to vibrate slightly, which will affect the spraying uniformity of the silver nanowire suspension on the substrate surface. In addition, during the spraying process, the temperature of different areas on the substrate surface is different and the temperature is uncontrollable, which will also cause the overall uniformity and stability of the silver nanowire suspension on the substrate surface, thereby affecting the quality of the conductive film after spraying. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes a silver nanowire spraying device and a spraying method. Through the separate setting of the box body and the air compressor and the shell, the setting of the agitator, the three-axis movable axis, and the combination of the heating substrate and the heating fan, the uniformity of the silver nanowire suspension during the tank discharge and spraying process is ensured, and the problem of uniformity and stability affected by vibration and uneven heating of the substrate surface during the spraying process is avoided, thereby greatly ensuring the quality of the conductive film after spraying.

[0005] In order to achieve the above-mentioned object, in the first aspect, the present invention provides a silver nanowire spraying device, which adopts the following technical solution:

[0006] A silver nanowire spraying device comprises a shell, a spray head is arranged above the shell through a three-axis movable axis, and a heating substrate for placing a substrate is arranged above the shell, and a heating fan is arranged near the heating substrate;

[0007] A box body and an air compressor are arranged at the lower part of the shell, and the box body and the air compressor are separately arranged from the shell; a raw material storage tank is arranged on the box body, and an agitator is arranged on the raw material storage tank; the raw material storage tank is connected to the nozzle through the air compressor.

[0008] Furthermore, the air compressor is connected to a filter triplex, and the filter triplex is connected to the raw material storage tank via a proportional valve.

[0009] Furthermore, an exhaust hole is provided on the shell; an exhaust fan is installed at the exhaust hole; and a lighting tube is provided in the shell.

[0010] Furthermore, the heating fan includes a motor driver and a motor drive arranged on the motor driver.

[0011] Furthermore, the nozzle of the spray head is configured as a fan-shaped nozzle.

[0012] Further, heating fans are arranged on both sides of the heating substrate, and pipe groups connected to the heating fans are installed on the left and right sides of the heating substrate, and a plurality of air outlet holes are opened on the pipes; two pipe groups are vertically arranged on both sides of the heating substrate, and the pipe groups include a plurality of pipes parallel to each other, and the diameters of the plurality of air outlet holes on each pipe gradually increase along the direction of the hot air;

[0013] A plurality of temperature sensors are arranged in the vertical direction in the shell, and after calculating the temperature difference detected by every two adjacent temperature sensors, the temperature difference average of all temperature differences is obtained; when the temperature difference average is greater than a preset value, the air volume output per unit time of the heating fan is increased until the temperature difference average is less than or equal to the preset value, and the air volume output per unit time of the heating fan is restored.

[0014] Further, the three-axis movable axis includes an X-axis movable axis, a Y-axis movable axis and a Z-axis movable axis; the X-axis movable axis is connected to an X-axis motor driver, and limiters are provided at both ends of the X-axis movable axis; the Y-axis movable axis is connected to a Y-axis motor driver, and limiters are provided at both ends of the Y-axis movable axis, and the Z-axis movable axis is connected to a Z-axis motor driver; the nozzle is arranged on the Z-axis movable axis;

[0015] A display screen is arranged on the shell through the display, and a controller is arranged in the display, and the controller is connected with the display screen, the X-axis motor driver, the Y-axis motor driver and the Z-axis motor driver; a temperature sensor, a humidity sensor and an air pressure sensor are arranged in the shell; the temperature sensor, the humidity sensor and the air pressure sensor are connected with the controller.

[0016] Furthermore, a buffer structure is provided at the end of each axis of the three-axis movable axis, and the buffer structure includes a base, a buffer axis slidably arranged in a preset sliding hole on the base, and a spring sleeved on the buffer axis. When the axis of the three-axis movable axis moves to the inflection point, the spring is compressed or stretched, thereby avoiding vibration when the direction of the nozzle changes or an instantaneous change in the spraying speed.

[0017] Furthermore, the controller is used to control the position of the nozzle in real time through the X-axis motor driver, the Y-axis motor driver and the Z-axis motor driver, and to detect the temperature, humidity and air pressure in the shell in real time through the temperature sensor, the humidity sensor and the air pressure sensor.

[0018] In order to achieve the above object, in a second aspect, the present invention also provides a silver nanowire spraying method, which adopts the following technical solution:

[0019] A silver nanowire spraying method, using the silver nanowire spraying device as described in the first aspect, comprising: using the stirrer to stir the silver nanowire suspension in the raw material storage tank; transporting the silver nanowire suspension in the raw material storage tank to the spray head by the air compressor;

[0020] The substrate surface on the heating substrate is uniformly heated by the heating substrate and the heating fan; the nozzle is driven to move by the three-axis moving shaft, and the nozzle sprays the silver nanowire suspension on the substrate surface on the heating substrate.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. In the present invention, a nozzle is arranged at the top of the shell through a three-axis movable shaft, and the multi-degree-of-freedom movable spraying mode of the three-axis movable shaft can make the silver nanowire suspension evenly sprayed on the entire surface of the substrate; on this basis, a box and an air compressor are arranged at the bottom of the shell in a split manner, a raw material storage tank is arranged on the box, and a stirrer is arranged on the raw material storage tank; the silver nanowire suspension in the raw material storage tank is stirred by the stirrer, so that the output silver nanowire suspension can be made more uniform and stable, and the spraying uniformity and stability of the silver nanowire suspension on the substrate surface are improved, and the separate arrangement of the box and the air compressor from the shell avoids the influence of the vibration of the air compressor and the stirrer on the three-axis movable shaft and the heating substrate, and further ensures the uniformity and stability of the silver nanowire suspension; at the same time, by heating the substrate and arranging a heating fan near the heating substrate, on the basis of ensuring the spraying stability of the silver nanowire suspension on the substrate surface, the heating fan can make the substrate surface heated evenly, and improve the spraying uniformity and stability of the silver nanowire suspension on the substrate surface. In summary, the present invention ensures the uniformity of the silver nanowire suspension during the process of discharging from the tank and spraying through the separate arrangement of the box body and the air compressor and the shell, the arrangement of the agitator, the three-axis movable shaft, and the combination of the heating substrate and the heating fan, and avoids the problem of uniformity and stability affected by vibration and uneven heating of the substrate surface during the spraying process, thereby ensuring the quality of the conductive film after spraying to a great extent.

[0023] 2. In the present invention, two pipe groups are vertically arranged on both sides of the heating substrate, and the pipe groups include a plurality of pipes parallel to each other, so that the hot air blown out by the two heating fans is evenly blown to the upper space of the heating substrate, so that the temperature uniformity in the upper environment of the heating substrate is higher; on this basis, the diameters of the multiple air outlets on each pipe gradually increase along the direction of the hot air, and by increasing the air outlet away from the heating fan, the problem of the environment temperature rising faster near the heating fan and the environment temperature rising slower away from the heating fan is avoided, thereby improving the uniformity of the temperature in the environment and ensuring the quality of the conductive film after spraying.

[0024] 3. The present invention considers the influence of the pipe group and the air outlet on the temperature inside the shell, sets a plurality of temperature sensors in the vertical direction inside the shell, calculates the temperature difference detected by each two adjacent temperature sensors, and then finds the average temperature difference of all temperature differences. When the average temperature difference is greater than the preset value, it means that the temperature inside the shell is uneven. At this time, the air volume per unit time of the heating fan is appropriately increased, and the uniformity of the overall ambient temperature inside the shell is improved by increasing the circulating air in the shell until the average temperature difference is less than or equal to the preset value, and the air volume per unit time of the heating fan is restored, so that the temperature inside the shell reaches the purpose of overall uniformity in a short time, thereby improving the quality of the conductive film after spraying. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings in the specification that constitute a part of this embodiment are used to provide a further understanding of this embodiment. The schematic embodiments of this embodiment and their descriptions are used to explain this embodiment and do not constitute improper limitations on this embodiment.

[0026] Figure 1 This is a schematic diagram of the structure of the device of Example 1 of the present invention;

[0027] Figure 2 It is a left side structural diagram of the device of embodiment 1 of the present invention;

[0028] Figure 3 This is a structural diagram of a raw material storage tank of the equipment of Example 1 of the present invention;

[0029] Figure 4 This is a structural diagram of the gas supply system of the device of Example 1 of the present invention;

[0030] Figure 5 This is a structural diagram of an exhaust system of an apparatus according to Embodiment 1 of the present invention;

[0031] Figure 6 This is a structural diagram of a heating fan of a device according to Embodiment 1 of the present invention;

[0032] Figure 7 This is a structural diagram of a pipeline group according to Embodiment 1 of the present invention;

[0033] Figure 8 This is a structural diagram of the air outlet of Example 1 of the present invention;

[0034] Fig. 9 A structural diagram of a three-axis movable axis of a device according to Embodiment 1 of the present invention;

[0035] Fig.10 This is a schematic diagram of a buffer structure according to Embodiment 1 of the present invention;

[0036] Fig.11 This is a structural diagram of a nozzle of a device according to Embodiment 1 of the present invention;

[0037] Fig.12 This is a schematic diagram of a display screen of a device according to Embodiment 1 of the present invention;

[0038] Among them, 1. shell; 2. upper hatch; 3. lower hatch; 4. wheels; 5. box; 6. raw material storage tank; 7. water tank; 8. tank cover switch; 9. agitator; 10. air compressor; 11. terminal; 12. exhaust port; 13. exhaust fan; 14. heating substrate; 1401. pipeline group; 1402. air outlet; 15. heating fan; 16. nozzle; 17. three-axis moving shaft; 18. button; 19. display screen; 20. gas storage tank; 21. proportional valve; 22. filter triplex; 23. , air pressure sensor; 24, solenoid valve; 25, axis motor driver; 26, lighting tube; 27, temperature sensor; 28, exhaust fan motor driver; 29, humidity sensor; 30, gas sensor; 31, fan blade; 32, heating fan motor driver; 33, X-axis moving axis; 34, Y-axis moving axis; 35, Z-axis moving axis; 36, X-axis motor driver; 37, Y-axis motor driver; 38, Z-axis motor driver; 39, X-axis limiter; 40, Y-axis limiter; 41, nozzle. DETAILED DESCRIPTION

[0039] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0040] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0041] Embodiment 1:

[0042] like Figure 1As shown, this embodiment provides a silver nanowire spraying device, including a housing 1, a raw material storage system component, an air supply system component, an exhaust system component, a temperature control system component, a spraying system component, and a control system component. The bottom of the housing 1 is provided with wheels 4 to facilitate the movement of the device. The housing 1 is composed of an upper and lower part, respectively having an upper hatch 2 and a lower hatch 3, which is convenient for the staff to operate. The top of the housing 1 is provided with an exhaust port 12 for connecting an external exhaust pipe to exhaust the gas in the cavity.

[0043] like Figure 1 and Figure 3 As shown, the raw material storage system components include a raw material storage tank 6, a water tank 7, a tank cover switch 8, and a stirrer 9. The raw material storage tank 6 is placed on a box 5, and the box 5 is a movable box, which is convenient for replacing raw materials. The raw material storage tank 6 can be opened by the tank cover switch 8, and the raw materials are poured into it. After that, the tank cover is closed, and the stirrer 9 can be used to fully stir the raw materials.

[0044] Specifically, running wheels are arranged under the box body 5, the box body 5 is not in contact with the lower part of the shell 1, and the raw material storage tank 6 and the stirrer 9 are separately arranged from the heating plate 14 and the nozzle 16 above the shell 1, thereby avoiding the influence of the vibration of the raw material storage tank 6 itself and the vibration generated by the stirrer 9 when working on the heating plate 14 and the nozzle 16, avoiding the problem of uneven spraying of the silver nanowire suspension on the surface of the substrate, and ensuring the quality of the conductive film after spraying.

[0045] The lid of the raw material storage tank 6 can be set to a manual opening mode or an automatic opening mode; when set to a manual opening mode, the lid switch 8 can be implemented using a structure such as a caliper or a buckle, which can fix the lid at the opening of the raw material storage tank 6 and open the lid on the raw material storage tank 6.

[0046] The water tank 7 can be connected to the raw material storage tank 6 through a pipeline, a pump, etc., and is used to adjust the solubility of the suspension solution in the raw material storage tank 6 and flush the raw material storage tank 6 after spraying.

[0047] The stirrer 9 can adopt a stirring rod mechanism driven by a motor. Optionally, the motor of the stirrer 9 is arranged on the filling cover or other structural components of the raw material storage tank 6, and the stirring rod is located inside the raw material storage tank 6. When the motor drives the stirring rod to rotate, the silver nanowire suspension in the raw material storage tank 6 can be fully stirred, so that the output silver nanowire suspension is more uniform and stable, and the uniformity and stability of the spraying of the silver nanowire suspension on the substrate surface are improved. At the same time, the raw material storage tank 6 is placed on the box body 5, and the box body 5 is separately arranged from the shell 1, so as to avoid the influence of the vibration generated during the stirring process on the heating plate 14 and the nozzle 16, and can avoid the problem of uneven spraying of the silver nanowire suspension on the substrate surface, and further improve the quality of the conductive film after spraying.

[0048] like Figure 1 and Figure 4 As shown, the air supply system components include an air compressor 10, an air storage tank 20, a proportional valve 21, a triplet 22, an air pressure sensor 23, and a solenoid valve 24. The air storage tank 20 can be understood as a raw material storage tank 6.

[0049] Specifically, the air compressor 10 is connected to the filter triplet 22, and the filter triplet 22 is connected to the air storage tank 20 through the proportional valve 21. The output pressure can be controlled by adjusting the proportional valve 21. The air pressure sensor 23 is located at the proportional valve 21, and is used to detect the pressure and display it in real time through the display screen 19.

[0050] like Figure 1 and Figure 5 As shown, the exhaust system components include an exhaust hole 12 , an exhaust fan 13 , a motor driver 28 and a lighting tube 26 .

[0051] Specifically, the exhaust hole 12 is opened at the top of the shell 1, and is used to connect an external pipeline to transport gas; the exhaust fan 13 is installed at the exhaust hole 12, and the exhaust fan 13 is driven by the motor driver 28 to speed up the exhaust efficiency; the lighting tube 26 is installed above the inside of the shell 1 for lighting, so that the staff can clearly observe the internal situation of the equipment.

[0052] like Figure 1 and Figure 6 As shown, the temperature control system assembly includes a heating base plate 14 and a heating fan 15 .

[0053] Specifically, the heating substrate 14 is located at the bottom of the upper half of the shell 1, and is heated by an aluminum hot plate. It supports adjusting the temperature of the hot plate to 100°C within two minutes, with a maximum temperature of 180°C and a stable and adjustable temperature. The size of the heating substrate is 600mm×600mm; the heating fan 15 includes fan blades 31 and a motor driver 32, supports heating the space inside the device, and the temperature is stable and adjustable within the range of 15°C to 50°C, and is located at the corners of the upper half of the device.

[0054] In some embodiments, optionally, Figure 7 and Figure 8 As shown, an aluminum hot plate is installed at the bottom of the heating substrate 14 to evenly heat the heating substrate 14. Heating fans 15 are installed on both sides of the heating substrate 14 to heat the entire space environment. Correspondingly, pipe groups 1401 are installed on the left and right sides of the heating substrate 14 to guide the hot air to evenly diffuse in the entire space; optionally, a plurality of air outlet holes 1402 are opened on the pipe 1401 to facilitate heat diffusion.

[0055] Optionally, two pipe groups 1401 are vertically arranged on both sides of the heating substrate 14, and the pipe group 1401 includes a plurality of parallel pipes, so that the hot air blown out by the two heating fans 15 is evenly blown to the upper space of the heating substrate 14, so that the temperature uniformity in the upper environment of the heating substrate 14 is higher; on this basis, the diameters of the multiple air outlets 1402 on each pipe gradually increase along the direction of the hot air, and by increasing the air outlet away from the heating fan 15, the problem of the rapid increase in ambient temperature near the heating fan 15 and the slow increase in ambient temperature away from the heating fan 15 is avoided, thereby improving the uniformity of the temperature in the environment and ensuring the quality of the conductive film after spraying.

[0056] like Fig. 9 and Fig.10 As shown, the spraying system assembly includes a spray head 16 and a three-axis moving shaft 17 .

[0057] Specifically, the bottom nozzle of the nozzle 16 is a fan-shaped nozzle 41, which further improves the overall uniformity of the silver nanowire suspension sprayed on the substrate surface. The nozzle 16 is fixed below the Z-axis moving axis 35, and its Z-axis position can be adjusted at will; the three-axis moving axis 17 includes an X-axis moving axis 33, a Y-axis moving axis 34 and a Z-axis moving axis 35; the X-axis moving axis 33 realizes the controllable movement of the nozzle in the X-axis through the X-axis motor driver 36, and limiters 39 are provided at both ends of the X-axis moving axis. The Y-axis moving axis 34 realizes the controllable movement of the nozzle 41 in the Y-axis through the Y-axis motor driver 37, and limiters 40 are provided at both ends of the Y-axis moving axis 35. The Z-axis moving axis 35 realizes the controllable movement of the nozzle in the Z-axis through the Z-axis motor driver 38. Optionally, the X-axis moving axis 33, the Y-axis moving axis 34 and the Z-axis moving axis 35 can be realized by linear motors and other equipment. The limiter 39 and the limiter 40 can be a limit plate or a limit switch.

[0058] Optional, such as Fig.11 As shown, the three-axis movable shaft 17 adopts a servo motor and a servo driver to achieve precise control of the shaft body, and the motor runs stably to keep the shaft body and the nozzle moving at a uniform speed. The end of each shaft of the three-axis movable shaft 17 is provided with a buffer structure 1701 to maintain the stability of the nozzle during operation; the buffer structure 1701 is a spring buffer, and the buffer structure 1701 includes a base 1702, a buffer shaft 1703 slidably arranged in a preset sliding hole 1703 on the base 1702, and a spring 1704 sleeved on the buffer shaft 1703. When the shaft body of the three-axis movable shaft 17 moves to the inflection point, the spring 1704 is compressed or stretched, thereby avoiding vibration when the nozzle direction changes or instantaneous change in the spraying speed, and maintaining the stability of the nozzle operation.

[0059] Optionally, the nozzle 16 includes a spray width adjustment knob, a liquid output adjustment knob, and an atomization adjustment knob, and the spraying process is precisely controlled by adjusting the knobs. The liquid output adjustment knob is used to control the liquid output amount. The atomization adjustment knob is used to control the strength of the liquid atomization amount. The spray width adjustment knob is used to control the fan-shaped surface size of the liquid spray width.

[0060] like Figure 1 and Fig.12 As shown, the control system components include a display screen 19 , a control button 18 , an X-axis motor driver 36 , a Y-axis motor driver 37 , a Z-axis motor driver 38 , an air pressure sensor 30 , a temperature sensor 27 and a humidity sensor 29 .

[0061] Specifically, the display screen 19 is located on the side of the shell 1, and can display various controllable conditions in real time. The control button 18 is used to control the switches of various power supplies; the display screen 19 is set on the display, and a controller is set in the display. The controller and the display screen 19 control and display the position of the nozzle in real time through the X-axis motor driver 36, the Y-axis motor driver 37 and the Z-axis motor driver 38, and display the air pressure, temperature, humidity and other indicators in the shell 1 in real time through the air pressure sensor 30, the temperature sensor 27, and the humidity sensor 29, thereby realizing precise control of the spraying conditions.

[0062] Optionally, as the air pressure and temperature in the shell 1 increase, the distance between the nozzle 16 and the substrate surface is increased, and the spraying speed of the nozzle 16 is increased by controlling the X-axis motor driver 36, the Y-axis motor driver 37, and the Z-axis motor driver 38, thereby improving the spraying efficiency; on the contrary, as the air pressure and temperature in the shell 1 decrease, the distance between the nozzle 16 and the substrate surface is reduced, and the spraying speed of the nozzle 16 is reduced by controlling the X-axis motor driver 36, the Y-axis motor driver 37, and the Z-axis motor driver 38, thereby ensuring the spraying effect. As the humidity in the shell 1 increases, the distance between the nozzle 16 and the substrate surface is reduced, and the spraying speed of the nozzle 16 is reduced; on the contrary, as the humidity in the shell 1 decreases, the distance between the nozzle 16 and the substrate surface is increased, and the spraying speed of the nozzle 16 is increased.

[0063] In other embodiments, the temperature, humidity and air pressure in the housing 1 are optionally detected, and the spraying rate, spraying distance, liquid output and other parameters are further regulated by detecting the temperature, humidity and air pressure in the housing 1 to maintain a consistent spraying effect. If it is detected that the ambient temperature rises, the humidity increases, and the spraying pressure increases, the spraying rate is accelerated, the spraying distance is increased, and the liquid output is increased. Conversely, if it is detected that the ambient temperature decreases, the humidity decreases, and the spraying pressure decreases, the spraying rate is slowed down, the spraying distance is reduced, and the liquid output is reduced.

[0064] In other embodiments, considering the influence of the pipe group 1401 and the air outlet 1402 on the temperature inside the shell 1, multiple temperature sensors are arranged in the vertical direction inside the shell 1, and after calculating the temperature difference detected by each two adjacent temperature sensors, the temperature difference average of all temperature differences is calculated. When the temperature difference average is greater than the preset value, it means that the temperature inside the shell 1 is uneven. At this time, the air volume per unit time of the heating fan 15 is appropriately increased, and the uniformity of the overall ambient temperature inside the shell 1 is improved by increasing the circulating air inside the shell 1, until the temperature difference average is less than or equal to the preset value, and the air volume per unit time of the heating fan 15 is restored, so that the temperature inside the shell 1 reaches the purpose of overall environmental uniformity in a short time, thereby improving the quality of the conductive film after spraying.

[0065] In other embodiments, the temperature, humidity and air pressure in the housing 1 are weighted and summed, the weights of temperature and air pressure are positive, and the weight of humidity is negative, and the weights can be obtained through experience or experiment. As the weighted sum value increases, the distance between the nozzle 16 and the substrate surface is increased by controlling the X-axis motor driver 36, the Y-axis motor driver 37 and the Z-axis motor driver 38, and the spraying speed of the nozzle 16 is increased; on the contrary, as the weighted sum value decreases, the distance between the nozzle 16 and the substrate surface is reduced by controlling the X-axis motor driver 36, the Y-axis motor driver 37 and the Z-axis motor driver 38, and the spraying speed of the nozzle 16 is reduced.

[0066] Embodiment 2:

[0067] This embodiment provides a silver nanowire spraying method, using the silver nanowire spraying equipment as described in Example 1, including: using the stirrer 9 to stir the silver nanowire suspension in the raw material storage tank 6; transporting the silver nanowire suspension in the raw material storage tank 6 to the spray head 16 through the air compressor 10;

[0068] The substrate surface on the heating substrate 14 is uniformly heated by the heating substrate 14 and the heating fan 15 ; the nozzle 16 is driven to move by the three-axis moving shaft 17 , and the nozzle 16 sprays the silver nanowire suspension on the substrate surface on the heating substrate 14 .

[0069] The above description is only a preferred embodiment of the present embodiment and is not intended to limit the present embodiment. For those skilled in the art, the present embodiment may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present embodiment shall be included in the protection scope of the present embodiment.

Claims

1. A silver nanowire spraying device, characterized in that: It comprises a shell (1), a nozzle (16) is arranged on the upper part of the shell (1) via a three-axis movable shaft (17), and a heating substrate (14) for placing a substrate is arranged on the upper part of the shell (1), and a heating fan (15) is arranged near the heating substrate (14); A box body (5) and an air compressor (10) are arranged at the lower part of the shell (1), and the box body (5) and the air compressor (10) are arranged separately from the shell (1); a raw material storage tank (6) is arranged on the box body (5), and an agitator (9) is arranged on the raw material storage tank (6); the raw material storage tank (6) is connected to the nozzle (16) through the air compressor (10).

2. A silver nanowire spraying device as claimed in claim 1, characterized in that: The air compressor (10) is connected to a filter triplex (22), and the filter triplex (22) is connected to the raw material storage tank (6) via a proportional valve (21).

3. The silver nanowire spraying device according to claim 1, characterized in that: An exhaust hole (12) is provided on the shell (1); an exhaust fan (13) is installed at the exhaust hole (12); and a lighting tube (26) is provided in the shell (1).

4. The silver nanowire spraying device according to claim 1, characterized in that: The heating fan (15) includes a motor driver (32) and (31) arranged on the motor driver (32).

5. The silver nanowire spraying device according to claim 1, characterized in that: The nozzle (41) of the spray head (16) is configured as a fan-shaped nozzle.

6. The silver nanowire spraying device according to claim 1, characterized in that: Heating fans (15) are arranged on both sides of the heating substrate (14); pipe groups (1401) connected to the heating fans (15) are installed on the left and right sides of the heating substrate (14); and a plurality of air outlet holes (1402) are opened on the pipes (1401); two pipe groups (1401) are arranged vertically on both sides of the heating substrate (14); the pipe groups (1401) include a plurality of pipes parallel to each other; and the diameters of the plurality of air outlet holes (1402) on each pipe gradually increase along the direction of the hot air; A plurality of temperature sensors are arranged in the vertical direction in the housing (1), and after calculating the temperature difference detected by every two adjacent temperature sensors, the temperature difference average of all the temperature differences is calculated; When the mean temperature difference is greater than a preset value, the air volume per unit time of the heating fan (15) is increased until the mean temperature difference is less than or equal to the preset value, and the air volume per unit time of the heating fan (15) is restored.

7. The silver nanowire spraying device according to claim 1, characterized in that: The three-axis movable axis (17) comprises an X-axis movable axis (33), a Y-axis movable axis (34) and a Z-axis movable axis (35); the X-axis movable axis (33) is connected to an X-axis motor driver (36), and stoppers (39) are provided at both ends of the X-axis movable axis (33); the Y-axis movable axis (34) is connected to a Y-axis motor driver (37), and stoppers (40) are provided at both ends of the Y-axis movable axis (34); and the Z-axis movable axis (35) is connected to a Z-axis motor driver (38); and the nozzle (16) is arranged on the Z-axis movable axis (35); A display screen (19) is arranged on the shell (1) through a display, and a controller is arranged in the display, and the controller is connected to the display screen (19), the X-axis motor driver (36), the Y-axis motor driver (37) and the Z-axis motor driver (38); a temperature sensor (27), a humidity sensor (29) and an air pressure sensor (30) are arranged in the shell (1); the temperature sensor (27), the humidity sensor (29) and the air pressure sensor (30) are connected to the controller.

8. The silver nanowire spraying device according to claim 7, characterized in that: The end of each axis of the three-axis movable axis (17) is provided with a buffer structure (1701), and the buffer structure (1701) comprises a base (1702), a buffer axis (1703) slidably arranged in a preset sliding hole (1703) on the base (1702), and a spring (1704) sleeved on the buffer axis (1703). When the axis of the three-axis movable axis (17) moves to an inflection point, the spring (1704) is compressed or stretched, thereby preventing vibration or instantaneous change in spraying speed when the direction of the nozzle (16) changes.

9. The silver nanowire spraying device according to claim 8, characterized in that: The controller is used to control the position of the nozzle (16) in real time through the X-axis motor driver (36), the Y-axis motor driver (37) and the Z-axis motor driver (38), and to detect the temperature, humidity and air pressure in the shell (1) in real time through the temperature sensor (27), the humidity sensor (29) and the air pressure sensor (30).

10. A method for spraying silver nanowires, characterized in that: The silver nanowire spraying device according to any one of claims 1 to 9 is used, comprising: using the stirrer (9) to stir the silver nanowire suspension in the raw material storage tank (6); transporting the silver nanowire suspension in the raw material storage tank (6) to the spray head (16) through the air compressor (10); The surface of the substrate on the heating substrate (14) is uniformly heated by the heating substrate (14) and the heating fan (15); the spray head (16) is driven to move by the three-axis moving shaft (17), and the spray head (16) sprays the silver nanowire suspension on the surface of the substrate on the heating substrate (14); When the ambient temperature rises, the humidity increases, and the spraying pressure increases, the spraying rate will be accelerated, the spraying distance will be increased, and the liquid output will be increased. Conversely, if the ambient temperature decreases, the humidity decreases, and the spraying pressure decreases, the spraying rate will be slowed down, the spraying distance will be reduced, and the liquid output will be reduced.

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