Coating device

Abstract

The utility model relates to a coating device, which belongs to the field of coating devices and comprises a coating roller and a coating groove, the top of the coating groove is open, the coating roller is inserted into the opening of the coating groove, the top of the coating roller is positioned above the coating groove, one end of the coating roller is provided with a rotary supporting seat, and the other end of the coating roller is provided with a rotating shaft. The other end of the coating roller is connected with a driving source; a gas tank is arranged at the bottom of the coating tank, one side of the gas tank is connected with a gas inlet pipe, the other side of the gas tank is connected with a gas outlet pipe, and the gas inlet pipe is connected with a gas supply system; and one side of the coating groove is connected with a scraper. During the substrate coating process, the coating position of the substrate is arranged downwards, the influence of falling dust is reduced, air acts on the bottom of the substrate, the influence of impurities on the coating effect can be avoided, the thickness of coating liquid on the coating roller is controlled through the scraper, and the coating effect of the substrate can be ensured.

Description

Technical Field

[0001] This utility model relates to a coating device and belongs to the field of coating devices. Background Art

[0002] With the rapid development of new energy sources, perovskite solar cells, as a new type of solar cell with high efficiency and low cost, have been widely used in photovoltaic power generation, optoelectronic devices, optoelectronic sensors and other fields.

[0003] In the fabrication process of perovskite solar cells, a coating device is required to apply the coating liquid onto the substrate. However, existing coating devices require the substrate film to face upwards, which places very high demands on the cleanliness of the production environment. If dust falls onto the substrate during the fabrication process, it can lead to perovskite film defects, affecting the appearance and performance of the device.

[0004] Therefore, a coating device is needed to reduce the impact of dust on the quality of the film. Summary of the Invention

[0005] The technical problem to be solved by this utility model is: to overcome the shortcomings of the prior art and provide a coating device that reduces the impact of dust on the quality of the film.

[0006] The technical solution adopted by this utility model to solve the above problems is as follows: a coating device, including a coating roller and a coating trough, the top of the coating trough is open, the coating roller is inserted into the opening of the coating trough, the top of the coating roller is located above the coating trough, one end of the coating roller is provided with a rotating support seat, and the other end of the coating roller is connected to a drive source.

[0007] An air box is provided at the bottom of the coating tank. An air inlet pipe is connected to one side of the air box, and an air outlet pipe is connected to the other side of the air box. The air inlet pipe is connected to the air supply system.

[0008] A scraper is connected to one side of the coating tank.

[0009] Preferably, the driving source is a coating motor.

[0010] Preferably, both the rotating support and the coating motor are equipped with coating lifters, which drive the rotating support and the coating motor to move up and down synchronously.

[0011] Preferably, both ends of the coating tank are provided with end caps, and the end caps and the coating tank enclose the coating roller.

[0012] Preferably, multiple air outlet pipes are provided, and the multiple air outlet pipes are distributed along the length direction of the coating roller.

[0013] Preferably, the air outlet pipe is arranged at an angle.

[0014] Preferably, two support rods are fixed on the coating tank, arranged side by side, and each support rod is fitted with a slider. The slider is locked to the support rod by screws, and the slider is fixedly connected to the scraper.

[0015] Preferably, the air supply system is an air pump.

[0016] Preferably, the doctor blade is located below the axis of the coating roller.

[0017] Preferably, the system also includes a storage tank and a supply device. The storage tank is connected to the supply device. The storage tank is used to store the coating liquid. When the coating liquid needs to be added to the coating tank, the supply device delivers the coating liquid from the storage tank to the coating tank.

[0018] Compared with the prior art, the advantages of this utility model are:

[0019] This utility model discloses a coating device in which the coating position of the substrate is arranged downwards during substrate coating, reducing the impact of falling dust. Secondly, by applying air to the bottom of the substrate, impurities can be avoided from affecting the coating effect. Furthermore, by controlling the thickness of the coating liquid on the coating roller through the doctor blade, the substrate coating effect can be ensured. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a coating device according to the present invention;

[0021] Figure 2 A schematic diagram showing the connection structure of the coating tank, air box, and doctor blade;

[0022] Figure 3 for Figure 2 A sectional view;

[0023] Figure 4 for Figure 2 Enlarged view of part A.

[0024] The components include: coating roller 221, coating trough 222, rotating support base 223, coating motor 224, coating lifter 225, end cap 226, air box 227, air inlet pipe 228, air outlet pipe 229, doctor blade 230, support rod 231, slider 232, and screw 233. DETAILED DESCRIPTION

[0025] like Figure 1-4As shown, a coating apparatus in this embodiment includes a coating roller 221 and a coating trough 222. The top of the coating trough 222 is open, and the coating roller 221 is inserted into the opening of the coating trough 222. The top of the coating roller 221 is located above the coating trough 222. One end of the coating roller 221 is provided with a rotating support 223, and the other end of the coating roller 221 is connected to a drive source, wherein the drive source is a coating motor 224. Both the rotating support 223 and the coating motor 224 are equipped with coating lifters 225. The coating lifters 225 drive the rotating support 223 and the coating motor 224 to move up and down synchronously, thereby realizing the raising and lowering of the coating roller 221. During coating, coating liquid is injected into the coating trough 222, and... The bottom of the coating roller 221 is immersed in the coating liquid. When the substrate is transported above the coating roller 221, the coating lifter 225 drives the rotating support 223 and the coating motor 224 to rise, so that the top of the coating roller 221 abuts against the bottom of the substrate. Then, the coating motor 224 starts, causing the coating roller 221 to rotate. When the coating roller 221 rotates, the coating liquid is applied to the bottom of the substrate to achieve coating. In addition, during the rotation of the coating roller 221, the substrate moves, and the linear velocity of the coating roller 221 and the substrate contact position is consistent. After coating is completed and the substrate is separated from the coating roller 221 by the movement of the substrate, the rotating support 223 and the coating motor 224 are driven to descend, so that the coating roller 221 descends to achieve reset.

[0026] Both ends of the coating tank 222 are provided with end caps 226. The end caps 226 and the coating tank 222 enclose the coating roller 221 to prevent the coating liquid on the coating roller 221 from leaking from both ends of the coating tank 222 during the coating process.

[0027] An air box 227 is provided at the bottom of the coating tank 222. An air inlet pipe 228 is connected to one side of the air box 227, and an air outlet pipe 229 is connected to the other side of the air box 227. Multiple air outlet pipes 229 are provided and distributed along the length of the coating roller 221. The air inlet pipe 228 is connected to an air supply system, which can be an air pump. During coating, clean air is delivered from the air inlet pipe 228 to the air box 227 through the air supply system. The air in the air box 227 is then discharged from the air outlet pipe 229 and acts on the bottom of the substrate. The air acts on the uncoated part of the substrate. Under the action of the airflow, impurities on the substrate are blown away to prevent impurities from affecting the coating effect of the substrate.

[0028] The air outlet pipe 229 is arranged at an angle. The air outlet pipe 229 is arranged at an angle to discharge air, and the air flow direction acting on the substrate is opposite to the substrate conveying direction, so as to avoid the airflow affecting the coating effect.

[0029] A scraper 230 is connected to one side of the coating tank 222;

[0030] Two support rods 231 are fixed on the coating tank 222. The two support rods 231 are arranged side by side and are parallel to the conveying direction of the substrate. Each support rod 231 is fitted with a slider 232. The slider 232 is locked to the support rod 231 by a screw 233. The slider 232 is fixedly connected to the doctor blade 230. During coating, the rotation of the coating roller 221 causes the doctor blade 230 to scrape off excess coating liquid, thus preventing excessive coating liquid on the coating roller 221 from affecting the coating effect. Of course, when it is necessary to adjust the thickness of the coating liquid on the coating roller 221, the screw 233 is loosened, and the slider 232 moves on the support rod 231, thereby adjusting the distance between the doctor blade 230 and the coating roller 221, thereby adjusting the thickness of the coating liquid on the coating roller 221. Of course, in order to facilitate the doctor blade 230 to scrape off excess coating liquid, the doctor blade 230 is located below the axis of the coating roller 221.

[0031] In addition, it also includes a liquid storage tank and a liquid supply device (not shown in the figure). The liquid storage tank is connected to the liquid supply device. The liquid storage tank is used to store coating liquid. When coating liquid needs to be added to the coating tank, the liquid supply device delivers the coating liquid in the liquid storage tank to the coating tank.

[0032] In summary, during substrate coating, the substrate is positioned downwards to reduce the impact of falling dust. Secondly, by applying air to the bottom of the substrate, impurities can be prevented from affecting the coating effect. Furthermore, by controlling the thickness of the coating liquid on the coating roller 221 through the doctor blade 230, the substrate coating effect can be ensured.

[0033] In addition to the above embodiments, this utility model also includes other implementation methods. All technical solutions formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of this utility model.

Claims

1. A coating apparatus, characterized in that: It includes a coating roller (221) and a coating trough (222), the top of the coating trough (222) is open, the coating roller (221) is inserted into the opening of the coating trough (222), the top of the coating roller (221) is located above the coating trough (222), one end of the coating roller (221) is provided with a rotating support (223), and the other end of the coating roller (221) is connected to a drive source; The bottom of the coating tank (222) is provided with an air box (227), one side of the air box (227) is connected to an air inlet pipe (228), the other side of the air box (227) is connected to an air outlet pipe (229), and the air inlet pipe (228) is connected to an air supply system. A scraper (230) is connected to one side of the coating tank (222).

2. The coating apparatus according to claim 1, characterized in that: The driving source is a coating motor (224).

3. The coating apparatus according to claim 2, characterized in that: Both the rotating support base (223) and the coating motor (224) are equipped with coating lifters (225), which drive the rotating support base (223) and the coating motor (224) to move up and down synchronously.

4. The coating apparatus according to claim 1, characterized in that: Both ends of the coating tank (222) are provided with end caps (226), and the end caps (226) and the coating tank (222) enclose the coating roller (221).

5. A coating apparatus according to claim 1, characterized in that: Multiple air outlet pipes (229) are provided, and the multiple air outlet pipes (229) are distributed along the length direction of the coating roller (221).

6. The coating apparatus according to claim 1, characterized in that: The air outlet pipe (229) is arranged at an angle.

7. The coating apparatus according to claim 1, characterized in that: Two support rods (231) are fixed on the coating tank (222). The two support rods (231) are arranged side by side. Each support rod (231) is fitted with a slider (232). The slider (232) is locked to the support rod (231) by screws (233). The slider (232) is fixedly connected to the scraper (230).

8. A coating apparatus according to claim 1, characterized in that: The gas supply system is an air pump.

9. A coating apparatus according to claim 1, characterized in that: The doctor blade (230) is located below the axis of the coating roller (221).

10. A coating apparatus according to any one of claims 1-9, characterized in that: It also includes a storage tank and a supply device. The storage tank is connected to the supply device. The storage tank is used to store coating liquid. When coating liquid needs to be added to the coating tank, the supply device delivers the coating liquid from the storage tank to the coating tank.

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