A coating device and a coating method

Abstract

The present invention discloses a coating device and a coating method. The coating device includes a first conveyor belt, a second conveyor belt, a suction cup, and a driving assembly. The first conveyor belt is used to receive a substrate. The second conveyor belt is used to drive the substrate to a material receiving position. The suction cup is provided with an adsorption surface for adsorbing the substrate and a relief groove formed by recessing from the adsorption surface. The relief groove is used to accommodate the first conveyor belt and the second conveyor belt, and the depth of the relief groove is greater than or equal to the maximum height of the first conveyor belt and the second conveyor belt. The driving assembly is used to drive the adsorption surface of the suction cup to rise from the bottom of the first conveyor belt to pass through the first conveyor belt to adsorb the substrate to be coated, or drive the adsorption surface of the suction cup to descend from the upper part of the second conveyor belt to place the coated substrate on the second conveyor belt. The coating device and coating method of the present invention are used to realize the suction cup to vertically transfer the substrate on the conveyor belt or place the substrate on the conveyor belt, reduce the volume of the coating device and reduce the load of the driving assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of slot coating, and particularly to a coating device. Background Art

[0002] Coating devices are widely used in fields such as the preparation of solar cells. A coating device is used to coat a liquid film on a substrate. Existing coating devices generally include a coating head and a transfer assembly. The transfer assembly is used to drive the substrate to move, and the coating head is used to coat a liquid film on the surface of the substrate. By continuously driving different substrates to move under the coating head through the transfer assembly, the coating head can perform coating operations on different substrates, and the transfer assembly removes the substrate after coating is completed, so that the coating device can perform coating processing on a batch of substrates.

[0003] In existing coating devices, the transfer assembly includes a conveyor belt for moving the substrate onto a suction cup, and an output conveyor belt for moving the coated substrate to a receiving position. The conveyor belt includes an upper conveyor belt and a lower conveyor belt. The substrate is placed on the upper conveyor belt and is driven by the upper conveyor belt to move above the lower conveyor belt. Then, the upper conveyor belt moves downward so that the substrate is placed on the lower conveyor belt, and the lower conveyor belt conveys the substrate to the suction cup. The output conveyor belt has the same structure as the conveyor belt. This driving method requires the conveyor belt to move up and down to complete the movement of the substrate. However, the conveyor belt has a large volume, and the space required for the conveyor belt to move up and down is large, resulting in a large volume of the coating device; moreover, the load of the driving device for driving the conveyor belt to move is also large. Summary of the Invention

[0004] The purpose of the present invention is to provide a coating device and a coating method for realizing that a suction cup vertically picks up a substrate on a conveyor belt or places the substrate on the conveyor belt, reducing the volume of the coating device and the load of the driving assembly.

[0005] The purpose of the present invention is achieved by the following technical solutions:

[0006] A coating device includes:

[0007] A first conveyor belt for receiving a substrate to be coated;

[0008] A second conveyor belt for driving the coated substrate to a receiving position;

[0009] A suction cup provided with an adsorption surface for adsorbing the substrate and an avoidance groove recessed from the adsorption surface. The avoidance groove is used to accommodate the first conveyor belt and the second conveyor belt, and the depth of the avoidance groove is greater than or equal to the maximum height of the first conveyor belt and the second conveyor belt;

[0010] A driving assembly is used to drive the adsorption surface of the suction cup to rise from the bottom of the first conveyor belt through the first conveyor belt to adsorb the substrate to be coated, or drive the adsorption surface of the suction cup to descend from the upper part of the second conveyor belt to place the coated substrate on the second conveyor belt.

[0011] Preferably, the avoidance groove penetrates through the suction cup in the horizontal direction;

[0012] And / or, the height of the first conveyor belt is the same as that of the second conveyor belt, and the depth of the avoidance groove is greater than the heights of the first conveyor belt and the second conveyor belt.

[0013] Preferably, a plurality of the suction cups and the driving assemblies are respectively provided, and each suction cup is driven by a corresponding driving assembly; the driving assembly drives the suction cups to move cyclically between the first conveyor belt, the coating position, and the second conveyor belt to form a cyclic path, and a plurality of the suction cups are sequentially arranged on the cyclic path.

[0014] Preferably, it further includes a carrier for supporting the suction cup, and the suction cup is connected to the driving assembly through the carrier; the driving assembly drives the carrier and the suction cup, and the maximum displacement in the vertical direction is greater than the height of the overall formed by the suction cup and the carrier.

[0015] Preferably, it further includes a guide rail extending in the first direction, the driving assembly includes a first driving group and a second driving group, the first driving group includes a slider connected to the guide rail and a driving member for driving the slider to move in the first direction; the second driving group is respectively connected to the slider and the suction cup, and the second driving group is used to drive the suction cup to move in the second direction;

[0016] Wherein, the first direction is the horizontal direction and the second direction is the vertical direction; or, the first direction is the vertical direction and the second direction is the horizontal direction.

[0017] Preferably, the coating equipment further includes a positioning assembly, the positioning assembly is arranged above the first conveyor belt, and the positioning assembly is used to position the position of the substrate.

[0018] Preferably, the positioning assembly includes a horizontal alignment group and a vertical alignment group, the horizontal alignment group is used to position the position of the substrate on the suction cup, and the vertical alignment group is used to position the height of the substrate and the suction cup.

[0019] A coating method, the coating method is executed by using any one of the above coating equipment, and the coating method includes:

[0020] Step S01: The feeding assembly supplies the substrate to be coated to the first conveyor belt;

[0021] Step S02: The driving component drives the adsorption surface of the suction cup to rise from below the first conveyor belt to pass through the first conveyor belt, and the suction cup adsorbs and fixes the substrate to be coated.

[0022] Step S03: The driving component drives the suction cup to move to the coating position and coat the substrate to be coated.

[0023] Step S04: The driving component drives the adsorption surface of the suction cup to be flush with or higher than the upper surface of the second conveyor belt, and the driving component drives the suction cup to move down and release the adsorption fixation of the suction cup, so that the suction cup is placed on the second conveyor belt.

[0024] Step S05: The second conveyor belt conveys the coated substrate to the receiving position.

[0025] Preferably, the step S02 specifically includes:

[0026] The driving component drives the adsorption surface of the suction cup to pass through the first conveyor belt and lift the substrate to be coated, and the positioning component positions the substrate to be coated, and the suction cup adsorbs and fixes the substrate to be coated.

[0027] Preferably, the two suction cups are simultaneously driven by the driving component to pass through the first conveyor belt and lift the substrate to be coated, and the positioning component simultaneously positions the substrates to be coated on the two suction cups.

[0028] Preferably, a plurality of suction cups are provided, and the plurality of suction cups respectively execute steps S01 to S05 in a cycle, and the plurality of suction cups sequentially move to the coating position, and the coating head continuously coats the substrates on the plurality of suction cups.

[0029] Preferably, the plurality of suction cups include a first suction cup, a second suction cup, a third suction cup and a fourth suction cup. The substrates on the first suction cup and the substrates on the second suction cup synchronously execute step S02 during the coating process, and the substrates on the third suction cup and the substrates on the fourth suction cup synchronously execute step S02 during the coating process.

[0030] Preferably, when the substrate on the first suction cup executes step S03 during the coating process, the second suction cup moves towards the first suction cup and abuts against the first suction cup. After the substrate on the first suction cup executes step S03 during the coating process, the substrate on the second suction cup executes step S03 during the coating process;

[0031] When the substrate on the second suction cup executes step S03 during the coating process, the third suction cup moves towards the second suction cup and abuts against the second suction cup. After the substrate on the second suction cup executes step S03 during the coating process, the substrate on the third suction cup executes step S03 during the coating process;

[0032] When the substrate on the third suction cup executes step S03 during the coating process, the fourth suction cup moves towards the third suction cup and abuts against the third suction cup. After the substrate on the third suction cup executes step S03 during the coating process, the substrate on the fourth suction cup executes step S03 during the coating process;

[0033] When the substrate on the fourth suction cup executes step S03 during the coating process, the first suction cup moves towards the fourth suction cup and abuts against the fourth suction cup. After the substrate on the fourth suction cup executes step S03 during the coating process, the substrate on the first suction cup executes step S03 during the coating process.

[0034] Compared with the prior art, the beneficial effects of the present invention at least include:

[0035] By providing a suction cup with an avoidance groove, the adsorption surface of the suction cup can move relative to the first conveyor belt or the second conveyor belt in the vertical direction from bottom to top or from top to bottom, so that the relative movement of the first conveyor belt and the second conveyor belt relative to the suction cup in the vertical direction can be realized by driving the suction cup, and the adsorption of the substrate to be coated by the suction cup and the placement of the substrate after coating can be realized; Therefore, the coating equipment does not need to reserve space for the up and down movement of the first conveyor belt and the second conveyor belt, and the volume of the suction cup is small, so that the volume of the coating equipment can be effectively reduced, and the load when driving the suction cup to move is much smaller than the load when driving the first conveyor belt and the second conveyor belt to move, reducing the driving intensity of the driving component. Description of the Drawings

[0036] Figure 1 is a schematic structural diagram of the coating equipment according to an embodiment of the present invention;

[0037] Figure 2 is a schematic structural diagram of the coating equipment according to an embodiment of the present invention from another perspective;

[0038] Figure 3 is a cross-sectional view of the coating equipment according to an embodiment of the present invention;

[0039] Figure 4 is a partial schematic structural diagram of the coating equipment according to an embodiment of the present invention;

[0040] Figure 5 is another partial schematic structural diagram of the coating equipment according to an embodiment of the present invention;

[0041] Figure 6 is still another partial schematic structural diagram of the coating equipment according to an embodiment of the present invention.

[0042] In the figure: 100, substrate; 1, first conveyor belt; 2, second conveyor belt; 3, suction cup; 31, avoidance groove; 32, adsorption surface; 33, carrier; 34, first suction cup; 35, second suction cup; 36, third suction cup; 37, fourth suction cup; 4, drive assembly; 41, first drive group; 411, slider; 42, second drive group; 5, guide rail; 6, positioning assembly; 61, horizontal alignment group; 611, alignment member; 62, vertical alignment group; 7, coating head. Detailed implementation manner

[0043] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this invention will be more complete and comprehensive, and will fully convey the concept of the example embodiments to those skilled in the art. Like reference numerals in the figures denote the same or similar structures, and thus their repetitive description will be omitted.

[0044] In the present invention, the words describing positions and directions are all illustrated by taking the accompanying drawings as examples, but can also be changed according to needs, and all the changes made are included in the protection scope of the present invention.

[0045] As Figures 1 to 6 shown, the present invention provides a coating device, including a coating head 7, a first conveyor belt 1, a second conveyor belt 2, a drive assembly 4, and a suction cup 3. It may also include a guide rail 5, a positioning assembly 6, and a carrier 33 for carrying the suction cup 3.

[0046] Referring to Figure 3 and Figure 5 , the first conveyor belt 1 is used to connect with a feeding device to receive the substrate 100 provided by the feeding device. A plurality of first conveyor belts 1 may be provided. For example, two first conveyor belts 1 are provided, and the two first conveyor belts 1 are spaced apart from each other. The two first conveyor belts 1 may be driven by the same drive device so that the two first conveyor belts 1 can move synchronously. The two first conveyor belts 1 can be jointly used to receive and support the substrate 100 provided by the feeding device, and the two first conveyor belts 1 can convey the substrate 100. Among them, the feeding device has been widely used in the coating device, so it will not be elaborated herein. The substrate 100 may specifically be a glass substrate. The first conveyor belt 1 can convey the substrate 100 in the direction towards the coating head 7.

[0047] Referring to Figure 1, the second conveyor belt 2 is used to connect with the blanking device so that the second conveyor belt 2 can transport the coated substrate 100 to the receiving position and be received by the blanking device. Multiple second conveyor belts 2 can be provided. For example, two second conveyor belts 2 are provided, and the two second conveyor belts 2 are spaced apart from each other. The two second conveyor belts 2 can be driven by the same driving device so that the two second conveyor belts 2 can move synchronously. The two second conveyor belts 2 can be jointly used to receive the substrate 100 after coating processing, and the two second conveyor belts 2 can transport the substrate 100. Among them, the blanking device has been widely used in coating equipment, so it will not be elaborated here. The second conveyor belt 2 can transport the substrate 100 in the direction towards the blanking device.

[0048] A coating position in the coating equipment is formed below the coating head 7. When the substrate 100 is located at the coating position below the coating head 7, the coating head 7 can coat the slurry on the surface of the substrate 100 to form a liquid film on the surface of the substrate 100. Among them, the coating head 7 can specifically coat perovskite slurry to form a perovskite layer on the surface of the substrate 100. The coating head 7 can be coated by means of slot coating. The coating length of the coating head 7 can exceed the substrate 100 to ensure the uniformity of the liquid film on the surface of the substrate 100. The part of the slurry that is not coated on the substrate 100 by the coating head 7 can also be received by a mask roller. The mask roller can adopt an existing common mask structure, so it will not be elaborated here.

[0049] Refer to Figure 5 , the suction cup 3 can adsorb and fix the substrate 100. For example, an adsorption surface 32 is formed on the top surface of the suction cup 3, and a number of adsorption holes are formed in the adsorption surface 32. The suction cup 3 is connected to a vacuum pumping device so that the vacuum pumping device can be connected to the adsorption holes to generate suction at the adsorption holes and thus adsorb and fix the substrate 100.

[0050] Refer to Figure 2 and Figure 4, the suction cup 3 can move cyclically between the first conveyor belt 1, the coating position, and the second conveyor belt 2 under the drive of the drive assembly 4 to form a circulation path. The suction cup 3 can move to the first conveyor belt 1 to adsorb and fix the substrate 100 on the first conveyor belt 1. Then, the suction cup 3 can drive the substrate 100 to move to the coating position for coating operations. After coating, the substrate 100 is driven by the suction cup 3 to move onto the second conveyor belt 2. The suction cup 3 releases the adsorption of the substrate 100, and the substrate 100 is conveyed to the receiving position by the second conveyor belt 2 to be received by the blanking device. Each time the suction cup 3 completes a circulation path, a coating operation on one substrate 100 can be achieved. Among them, the suction cup 3 can specifically be connected to the drive assembly 4 through the carrier 33, so that the drive assembly 4 can drive the suction cup 3 to move; specifically, the suction cup 3 is placed on the carrier 33 and remains relatively fixed in position with the carrier 33. The carrier 33 is connected to the drive assembly 4, and the carrier 33 can move under the drive of the drive assembly 4, thereby driving the suction cup 3 to move synchronously.

[0051] Referring to Figure 5 , the suction cup 3 can also be provided with an avoidance groove 31 for avoiding the conveyor belt. The avoidance groove 31 is recessed from the adsorption surface 32 of the suction cup 3, and the depth of the avoidance groove 31 is greater than or equal to the maximum height of the first conveyor belt 1 and the second conveyor belt 2. When the suction cup 3 moves to the first conveyor belt 1, the adsorption surface 32 of the suction cup 3 can pass through the first conveyor belt 1 from below the first conveyor belt 1 to move above the first conveyor belt 1 or be flush with the first conveyor belt 1. The avoidance groove 31 of the suction cup 3 is used to accommodate the first conveyor belt 1 to prevent interference between the suction cup 3 and the first conveyor belt 1. Among them, when the heights of the first conveyor belt 1 and the second conveyor belt 2 are the same, the depth of the avoidance groove 31 is greater than or equal to the heights of the first conveyor belt 1 and the second conveyor belt 2; specifically, when the height of the first conveyor belt 1 is greater than the height of the second conveyor belt 2, the depth of the avoidance groove 31 is greater than or equal to the height of the first conveyor belt 1; when the height of the second conveyor belt 2 is greater than the height of the first conveyor belt 1, the depth of the avoidance groove 31 is greater than or equal to the height of the second conveyor belt 2.

[0052] When the depth of the avoidance groove 31 of the suction cup 3 is equal to the height of the first conveyor belt 1, the adsorption surface 32 of the suction cup 3 moves to be flush with the first conveyor belt 1, and the adsorption surface 32 can contact the substrate 100 on the first conveyor belt 1. The suction cup 3 adsorbs and fixes the substrate 100 so that the suction cup 3 can pick up the substrate 100 on the first conveyor belt 1.

[0053] When the depth of the avoidance groove 31 of the suction cup 3 is greater than the height of the first conveyor belt 1, the adsorption surface 32 of the suction cup 3 moves to exceed the upper surface of the first conveyor belt 1, and the adsorption surface 32 can lift the substrate 100 on the first conveyor belt 1. The suction cup 3 adsorbs and fixes the substrate 100 so that the suction cup 3 can pick up the substrate 100 on the first conveyor belt 1.

[0054] When the depth of the avoidance groove 31 of the suction cup 3 is greater than or equal to the height of the second conveyor belt 2, the adsorption surface 32 of the suction cup 3 moves to be flush with the second conveyor belt 2. The adsorption surface 32 of the suction cup 3 can move to be flush with the upper surface of the second conveyor belt 2, and the substrate 100 on the suction cup 3 can then contact the second conveyor belt 2. The suction cup 3 releases the adsorption force on the substrate 100 and moves downward. At this time, the substrate 100 can be received by the second conveyor belt 2 and transported to the material receiving position.

[0055] As a preferred embodiment, the heights of the first conveyor belt 1 and the second conveyor belt 2 are the same, and the depth of the avoidance groove 31 of the suction cup 3 is greater than the heights of the first conveyor belt 1 and the second conveyor belt 2. In addition, the avoidance groove 31 can penetrate through the suction cup 3 in the horizontal direction.

[0056] By providing the avoidance groove 31 on the suction cup 3, the suction cup 3 can be driven to pass through the first conveyor belt 1 and the second conveyor belt 2 in the vertical direction to adsorb and fix the substrate 100 on the first conveyor belt 1 or place the substrate 100 on the second conveyor belt 2. The first conveyor belt 1 and the second conveyor belt 2 do not need to move. Therefore, the coating equipment does not need to reserve space for the up and down movement of the first conveyor belt 1 and the second conveyor belt 2. Moreover, the volume of the suction cup 3 is small, so that the volume of the coating equipment can be effectively reduced, and the load when driving the suction cup 3 to move is much smaller than the load when driving the first conveyor belt 1 and the second conveyor belt 2 to move, reducing the driving intensity of the driving assembly 4.

[0057] In addition, the suction cup 3 can realize cyclic movement among the first conveyor belt 1, the coating position, and the second conveyor belt 2 through horizontal movement and vertical movement. The suction cup 3 keeps its front side upward without being inverted, and the movement of the suction cup 3 is more stable and the structure of the driving assembly 4 for driving the suction cup 3 to move is also relatively simple.

[0058] To improve the continuity of the coating operation, multiple suction cups 3 and driving assemblies 4 can be respectively provided. Each suction cup 3 is connected to a corresponding driving assembly 4, and each suction cup 3 can move under the drive of the corresponding driving assembly 4. Specifically, multiple carrier platforms 33 are also provided. Each suction cup 3 is supported by a corresponding carrier platform 33 and is connected to the corresponding driving assembly 4 through the carrier platform 33. During the coating operation, multiple suction cups 3 can be sequentially arranged on the cyclic path. When the substrate 100 on one suction cup 3 is completed with coating, the next suction cup 3 can move to the lower part of the coating head 7 to continue the coating operation. Multiple suction cups 3 move sequentially along the cyclic path, so that the substrates 100 on multiple suction cups 3 move to the coating position successively, and the coating head 7 can continuously perform the coating operation, improving the efficiency of the coating equipment.

[0059] In a coating device, the first conveyor belt 1 is located above, and the second conveyor belt 2 is located below. When the suction cup 3 adsorbs the substrate 100 on the first conveyor belt 1 and moves towards the coating position, the suction cup 3 moves above; while when the suction cup 3 places the substrate 100 on the second conveyor belt 2 and moves towards the first conveyor belt 1, the suction cup 3 moves below. When there are multiple suction cups 3, it is possible that some suction cups 3 move above while some suction cups 3 move below. To avoid interference between the upper and lower layers of suction cups 3 during movement, the driving assembly 4 drives the suction cup 2 to have a maximum displacement in the vertical direction greater than the height of the suction cup 2 and the corresponding carrier 33 forming an integral body. Therefore, the suction cup 2 and the corresponding carrier 33 located above can be vertically spaced from the suction cup 2 and the corresponding carrier 33 located below. At this time, the horizontal movement of the suction cups 3 in the upper and lower layers can be undisturbed, avoiding interference during the movement of the suction cups 3 in the up and down directions.

[0060] Referring to Figure 2 and Figure 4 , the driving assembly 4 may specifically include a first driving group 41 and a second driving group 42. The first driving group 41 includes a slider 411 slidably engaged with a guide rail 5 and a driving member for driving the slider 411 to move. The driving member drives the slider 411 to slide relative to the extending direction of the guide rail 5, and the guide rail 5 may specifically extend along the first direction. The second driving group 42 is mounted on the slider 411 of the first driving group 41 so that the second driving group 42 can move synchronously with the slider 411. The second driving group 42 is connected to the carrier 33 and is used to drive the carrier 33 to move in the second direction. Therefore, the carrier 33 and the suction cup 3 can be driven by the driving assembly 4 to move in the first direction and the second direction. Among them, the first direction is the horizontal direction, and the second direction is the vertical direction; or, the first direction is the vertical direction, and the second direction is the horizontal direction. In this embodiment, the first direction is specifically the horizontal direction, and the second direction is specifically the vertical direction. The driving method of the driving member in the first driving group 41 driving the slider 411 to move and the second driving group 42 driving the carrier 33 to move is a common existing driving method, so it will not be elaborated here.

[0061] When there are multiple suction cups 3, multiple driving assemblies 4 are correspondingly provided, and the sliders 411 in the multiple driving assemblies 4 can be slidably engaged with one guide rail 5. Or, there are two guide rails 5, and the sliders 411 in some of the driving assemblies 4 are slidably engaged with one guide rail 5, and the sliders 411 in the remaining driving assemblies 4 are slidably engaged with the other guide rail 5. In this embodiment, to avoid mutual interference during the movement when multiple driving assemblies 4 cooperate with the same guide rail 5, multiple driving assemblies 4 cooperate with two guide rails 5.

[0062] Referring to Figure 2 and Figure 6, to ensure that the substrate 100 can be accurately moved to the coating position, the substrate 100 is positioned by a positioning assembly 6 before being moved to the coating position. The positioning assembly 6 can be arranged above the first conveyor belt 1, and the positioning assembly 6 can include a horizontal alignment group 61 and a vertical alignment group 62. When the suction cup 3 moves to the first conveyor belt 1 and lifts the substrate 100 on the first conveyor belt 1, the suction cup 3 can stop generating the adsorption force. At this time, the horizontal alignment group 61 aligns the horizontal position of the substrate 100 on the suction cup 3. After the horizontal alignment of the substrate 100, the suction cup 3 can adsorb and fix the substrate 100, and the vertical alignment group 62 positions the height of the substrate 100 and the suction cup 3. Then, the suction cup 3 moves towards the coating position driven by the driving assembly 4. Among them, the suction cup 3 can also not adsorb after the horizontal alignment of the substrate 100. After the horizontal and vertical alignment of the substrate 100, the suction cup 3 fixes the substrate 100.

[0063] The horizontal alignment group 61 can include a plurality of alignment members 611. When the suction cup 3 lifts the substrate 100 on the first conveyor belt 1, the plurality of alignment members 611 are arranged around the substrate 100, and the plurality of alignment members 611 can move towards the substrate 100 to push the substrate 100 to a predetermined position, thereby completing the horizontal alignment of the substrate 100. Among them, the alignment member 611 can be a roller or a baffle.

[0064] The vertical alignment group 62 can include a plurality of laser rangefinders. The plurality of laser rangefinders measure the position of the upper surface of the substrate 100, and adjust the height of the suction cup 3 according to the data measured by the laser rangefinders, so that the upper surface of the substrate 100 on the suction cup 3 reaches the predetermined coating plane height.

[0065] The positioning assembly 6 can position the substrate 100 on only one suction cup 3 at a time, or the positioning assembly 6 can position the substrates 100 on multiple suction cups 3 at a time. In this embodiment, the positioning assembly 6 positions the substrates 100 on two suction cups 3 at a time. That is, the alignment members 611 are arranged around the whole formed by the two substrates 100, so that the horizontal alignment group 61 can horizontally align the two substrates 100 at the same time. Laser rangefinders are arranged above both of the two substrates 100, so that the vertical alignment group 62 can vertically align the two substrates 100. Among them, the positioning assembly 6 can also be provided with a partition, and the partition is used to be arranged between adjacent substrates 100 to control the distance between adjacent substrates 100.

[0066] The present invention also provides a coating method, which is executed by the above coating equipment, and the coating method includes steps S01 to S05.

[0067] Step S01: The feeding assembly supplies the substrate 100 to be coated to the first conveyor belt 1.

[0068] Step S02: The driving component 4 drives the adsorption surface 32 of the suction cup 3 to rise from below the first conveyor belt 1 until it passes through the first conveyor belt 1, and the suction cup 3 adsorbs and fixes the substrate 100 to be coated. Among them, the adsorption surface 32 of the suction cup 3 can rise just through the first conveyor belt 1 so that the adsorption surface 32 of the suction cup 3 is flush with the upper surface of the first conveyor belt 1, or the adsorption surface 32 of the suction cup 3 rises above the first conveyor belt 1 so that the suction cup 3 can lift the substrate 100 on the first conveyor belt 1.

[0069] Step S03: The driving component 4 drives the suction cup 3 to move to the coating position and coats the substrate 100 to be coated.

[0070] Step S04: After the coating of the substrate 100 on the suction cup 3 is completed, the driving component 4 drives the suction cup 3 to move to the second conveyor belt 2. The driving component 4 drives the adsorption surface 32 of the suction cup 3 to be flush with or higher than the upper surface of the second conveyor belt 2. The driving component 4 drives the suction cup 3 to move down and releases the adsorption and fixation of the suction cup 3 so that the suction cup 3 is placed on the second conveyor belt 2.

[0071] Step S05: The second conveyor belt 2 conveys the coated substrate 100 to the material receiving position, and the suction cup 3 moves below the first conveyor belt 1.

[0072] In step S02, the driving component 4 specifically drives the adsorption surface 32 of the suction cup 3 to pass through the first conveyor belt 1 and lift the substrate 100 to be coated. The positioning component 6 is used to position the substrate 100 to be coated, and the suction cup 3 adsorbs and fixes the substrate 100 to be coated. Among them, the positioning component 6 positions the horizontal position and the vertical position of the substrate 100. The positioning component 6 can use the above-mentioned horizontal alignment group 61 to perform horizontal alignment on the substrate 100 and use the above-mentioned vertical alignment group 62 to position the vertical position of the substrate 100. After the horizontal alignment of the substrate 100 is completed, the suction cup 3 adsorbs and fixes the substrate 100, or after the horizontal alignment and vertical alignment of the substrate 100 are completed, the suction cup 3 adsorbs and fixes the substrate 100.

[0073] The positioning component 6 can simultaneously position multiple suction cups 3. For example, two suction cups 3 are simultaneously driven by the driving component 4 to pass through the first conveyor belt 1 and lift the substrate 100 to be coated, and the positioning component 6 simultaneously positions the substrates 100 to be coated on the two suction cups 3.

[0074] In step S03, the coating head 7 can coat the perovskite slurry on the substrate 100 by means of slot coating to coat a perovskite layer on the substrate 100. During the coating process, the coating head 7 remains fixed, and the suction cup 3 moves uniformly relative to the coating head 7 under the drive of the corresponding driving component 4 so that a complete and uniform liquid film can be coated on the upper surface of the substrate 100 on the suction cup 3.

[0075] In step S04, after the coating of the substrate 100 on the suction cup 3 is completed, the driving component 4 can drive the adsorption surface 32 of the suction cup 3 to be slightly higher than the upper surface of the second conveyor belt 2, and the lowest point of the second conveyor belt 2 is higher than the lowest point of the avoidance groove 31 in the suction cup 3. The driving component 4 drives the suction cup 3 to horizontally move from one side of the second conveyor belt 2 to the position where the second conveyor belt 2 penetrates into the avoidance groove 31. When the substrate 100 on the suction cup 3 is completely above the second conveyor belt 2, the suction cup 3 releases the adsorption of the substrate 100, and the suction cup 3 moves downward, and the substrate 100 falls onto the second conveyor belt 2.

[0076] The above coating method can use only one suction cup 3 to circulate and move at the first conveyor belt 1, the coating position, and the second conveyor belt 2. As a preferred method, in order to enable the coating equipment to perform continuous coating, multiple suction cups 3 can circulate and move in the above coating method. Each suction cup 3 can circulate and move under the drive of the corresponding driving component 4, and multiple suction cups 3 are arranged in sequence along the circulation path.

[0077] Each substrate 100 will execute the above steps S01 to S05 in a cycle during the coating process. Under the action of multiple suction cups 3, multiple substrates 100 can be sequentially moved to the coating position, that is, when the coating head 7 finishes coating the substrate 100 on one suction cup 3, the substrate 100 on the next suction cup 3 will move to the coating position for coating. Therefore, the coating head 7 can perform continuous coating, and the coating equipment can achieve continuous operation with high efficiency.

[0078] Refer to Figure 3 and Figure 4 In this embodiment, specifically, four suction cups 3 can be provided, namely the first suction cup 34, the second suction cup 35, the third suction cup 36, and the fourth suction cup 37. Among them, when each substrate 100 executes step S02 during the coating process, it can be carried out separately, or multiple substrates 100 can synchronously execute step S02 during the coating process. Specifically, the feeding component needs to supply multiple substrates 100 to the first conveyor belt 1, multiple suction cups 3 rise simultaneously, and each suction cup 3 lifts a corresponding substrate 100, and multiple substrates 100 on multiple suction cups 3 are positioned simultaneously. In this embodiment, two substrates 100 can synchronously execute step S02 during the coating process. The first suction cup 34 and the second suction cup 35 rise simultaneously and are used to lift two substrates 100, or the third suction cup 36 and the fourth suction cup 37 rise simultaneously and are used to lift two substrates 100. Among them, the driving components 4 corresponding to the first suction cup 34 and the second suction cup 35 are matched with one guide rail 5, and the driving components 4 corresponding to the third suction cup 36 and the fourth suction cup 37 are matched with another guide rail 5.

[0079] When performing the coating operation, the first suction cup 34 and the second suction cup 35 move below the first conveyor belt 1. The feeding assembly supplies the substrate 100 to be coated to the first conveyor belt 1, and ensures that there are at least two substrates 100 to be coated on the first conveyor belt 1. The first suction cup 34 and the second suction cup 35 rise synchronously and respectively lift a substrate 100 to be coated. Then, the substrates 100 on the first suction cup 34 and the second suction cup 35 are simultaneously positioned by the positioning assembly 6. After positioning is completed, the first suction cup 34 moves to the coating position. Then, the first suction cup 34 moves at a constant speed so that the coating head 7 coats the substrate 100 on the first suction cup 34. The second suction cup 35 gradually moves closer to the first suction cup 34 and moves at the same speed as the first suction cup 34. When the substrate 100 on the first suction cup 34 is being coated, the third suction cup 36 and the fourth suction cup 37 start to execute step S02 and subsequent steps, that is, the third suction cup 36 and the fourth suction cup 37 move below the first conveyor belt 1. The feeding assembly supplies the substrate 100 to be coated to the first conveyor belt 1, and ensures that there are at least two substrates 100 to be coated on the first conveyor belt 1. The third suction cup 36 and the fourth suction cup 37 rise synchronously and respectively lift a substrate 100 to be coated. Then, the substrates 100 on the third suction cup 36 and the fourth suction cup 37 are simultaneously positioned by the positioning assembly 6.

[0080] After the coating of the substrate 100 on the first suction cup 34 is completed, it moves to the second conveyor belt 2. And the second suction cup 35 moves to the coating position for coating. After positioning is completed, the third suction cup 36 gradually moves closer to the second suction cup 35 and moves at the same speed as the second suction cup 35. After the coating of the substrate 100 on the second suction cup 35 is completed, it moves to the second conveyor belt 2. And the third suction cup 36 moves to the coating position for coating. After positioning is completed, the fourth suction cup 37 gradually moves closer to the third suction cup 36 and moves at the same speed as the third suction cup 36. After the first suction cup 34 places the coated suction cup 3 on the second conveyor belt 2, it moves below the first conveyor belt 1. After the second suction cup 35 places the coated suction cup 3 on the second conveyor belt 2, it moves below the first conveyor belt 1.

[0081] The first suction cup 34 and the second suction cup 35 can rise synchronously and respectively lift a substrate 100 to be coated, and the positioning assembly 6 positions the substrate 100 on the first suction cup 34 and the second suction cup 35. When the substrate 100 on the fourth suction cup 37 is being coated, after the substrate 100 on the first suction cup 34 is positioned, it gradually moves close to the substrate 100 on the fourth suction cup 37 and moves at a uniform speed at the same speed as the fourth suction cup 37. After the substrate 100 on the fourth suction cup 37 is coated, it moves to the second conveyor belt 2, and the first suction cup 34 moves to the coating position for coating. After the second suction cup 35 is positioned, it gradually moves close to the first suction cup 34 and moves at a uniform speed at the same speed as the first suction cup 34. After the third suction cup 36 places the coated suction cup 3 on the second conveyor belt 2, it moves under the first conveyor belt 1; after the fourth suction cup 37 places the coated suction cup 3 on the second conveyor belt 2, it moves under the first conveyor belt 1.

[0082] The above steps are cyclically repeated so that the coating equipment can perform continuous coating operations.

[0083] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Without departing from the principle and purpose of the present invention, those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the invention, and all these changes should fall within the protection scope of the claims of the present invention.

Claims

1. A coating device, characterized in that: include: A first conveyor belt (1) for receiving a substrate (100) to be coated; A second conveyor belt (2) is used to drive the coated substrate (100) to a receiving position; a positioning component (6), the positioning component (6) being arranged above the first conveyor belt (1), the positioning component (6) being used to position the substrate (100); the positioning component (6) comprising a horizontal alignment group (61), the horizontal alignment group (61) being used to position the substrate (100) on the suction cup (3); A suction cup (3) provided with an adsorption surface (32) for adsorbing the substrate (100) and an avoidance groove (31) formed by being recessed from the adsorption surface (32), wherein the avoidance groove (31) is used to accommodate the first conveyor belt (1) and the second conveyor belt (2), and the depth of the avoidance groove (31) is greater than or equal to the maximum height of the first conveyor belt (1) and the second conveyor belt (2); The driving assembly (4) is used to drive the adsorption surface (32) of the suction cup (3) to rise from the bottom of the first conveyor belt (1) to pass through the first conveyor belt (1) to lift the substrate (100) to the positioning assembly (6) for positioning, and then the suction cup (3) adsorbs the substrate (100) to be coated, and is used to drive the suction cup (3) to move from one side of the second conveyor belt (2) toward the second conveyor belt (2), and to make the adsorption surface (32) of the suction cup (3) descend from the upper part of the second conveyor belt (2) to place the coated substrate (100) on the second conveyor belt (2); wherein the suction cup (3) is arranged in a forward direction during the movement, and the suction cup (3) is driven by the driving assembly (4) to circulate between the first conveyor belt (1), the coating position, and the second conveyor belt (2) to form a circulation path, and a plurality of suction cups (3) are arranged in sequence on the circulation path.

2. The coating device according to claim 1, characterized in that: The avoidance groove (31) passes through the suction cup (3) in the horizontal direction; And / or, the height of the first conveyor belt (1) is the same as that of the second conveyor belt (2), and the depth of the avoidance groove (31) is greater than the height of the first conveyor belt (1) and the second conveyor belt (2).

3. The coating device according to claim 1, characterized in that: The suction cup (3) and the drive assembly (4) are respectively provided in plurality, and each suction cup (3) is driven by a corresponding drive assembly (4).

4. The coating device according to claim 3, characterized in that: It also comprises a carrier (33) for supporting the suction cup (3), the suction cup (3) being connected to the driving assembly (4) via the carrier (33); the driving assembly (4) driving the carrier (33) and the suction cup (3) to achieve a maximum displacement in the vertical direction that is greater than the height of the whole formed by the suction cup (3) and the carrier (33).

5. The coating device according to claim 1, characterized in that: The device further comprises a guide rail (5) extending in a first direction, the drive assembly (4) comprising a first drive group (41) and a second drive group (42), the first drive group (41) comprising a slider (411) connected to the guide rail (5) and a drive member for driving the slider (411) to move in the first direction; the second drive group (42) is respectively connected to the slider (411) and the suction cup (3), and the second drive group (42) is used to drive the suction cup (3) to move in the second direction; The first direction is a horizontal direction, and the second direction is a vertical direction; or the first direction is a vertical direction, and the second direction is a horizontal direction.

6. The coating device according to claim 1, characterized in that: The positioning assembly (6) comprises a vertical alignment group (62), and the vertical alignment group (62) is used to position the height of the substrate (100) and the suction cup (3).

7. A coating method, characterized in that: The coating method is performed using the coating device according to any one of claims 1 to 6, and the coating method comprises: Step S01: The loading component supplies the substrate to be coated to the first conveyor belt (1); Step S02: the driving component (4) drives the adsorption surface (32) of the suction cup (3) to rise from below the first conveyor belt (1) to pass through the first conveyor belt (1), and the suction cup (3) adsorbs and fixes the substrate to be coated; Step S03: the driving component (4) drives the suction cup (3) to move to the coating position and coats the substrate to be coated; Step S04: the driving component (4) drives the adsorption surface (32) of the suction cup (3) to be flush with or higher than the upper surface of the second conveyor belt (2), and the driving component (4) drives the suction cup (3) to move from one side of the second conveyor belt (2) toward the second conveyor belt (2), so that the suction cup (3) moves downward and releases the adsorption and fixation of the substrate (100), so that the substrate (100) is placed on the second conveyor belt (2); Step S05: The second conveyor belt (2) transports the coated substrate to a receiving position.

8. The coating method according to claim 7, characterized in that: The step S02 specifically includes: The driving component (4) drives the adsorption surface (32) of the suction cup (3) to pass through the first conveyor belt (1) and lift up the substrate to be coated, the positioning component (6) is used to position the substrate to be coated, and the suction cup (3) adsorbs and fixes the substrate to be coated.

9. The coating method according to claim 8, characterized in that: The two suction cups (3) are simultaneously driven by the driving component (4) and pass through the first conveyor belt (1) and lift up the substrate to be coated, and the positioning component (6) simultaneously positions the substrate to be coated on the two suction cups (3).

10. The coating method according to claim 7, characterized in that: The suction cups (3) are provided in plurality, and the plurality of suction cups (3) respectively and cyclically execute steps S01 to S05, the plurality of suction cups (3) are moved to the coating position in sequence, and the coating head (7) continuously coats the substrates on the plurality of suction cups (3).

11. The coating method according to claim 10, characterized in that: The plurality of suction cups (3) include a first suction cup (34), a second suction cup (35), a third suction cup (36) and a fourth suction cup (37); the substrate on the first suction cup (34) and the substrate on the second suction cup (35) synchronously execute step S02 during the coating process; and the substrate on the third suction cup (36) and the substrate on the fourth suction cup (37) synchronously execute step S02 during the coating process.

12. The coating method according to claim 11, characterized in that: When the substrate on the first suction cup (34) performs step S03 during the coating process, the second suction cup (35) moves toward the first suction cup (34) and is close to the first suction cup (34), and after the substrate on the first suction cup (34) performs step S03 during the coating process, the substrate on the second suction cup (35) performs step S03 during the coating process; When the substrate on the second suction cup (35) performs step S03 during the coating process, the third suction cup (36) moves toward the second suction cup (35) and is close to the second suction cup (35), and after the substrate on the second suction cup (35) performs step S03 during the coating process, the substrate on the third suction cup (36) performs step S03 during the coating process; When the substrate on the third suction cup (36) performs step S03 during the coating process, the fourth suction cup (37) moves toward the third suction cup (36) and is close to the third suction cup (36), and after the substrate on the third suction cup (36) performs step S03 during the coating process, the substrate on the fourth suction cup (37) performs step S03 during the coating process; When the substrate on the fourth suction cup (37) performs step S03 during the coating process, the first suction cup (34) moves toward the fourth suction cup (37) and is close to the fourth suction cup (37). After the substrate on the fourth suction cup (37) performs step S03 during the coating process, the substrate on the first suction cup (34) performs step S03 during the coating process.

Images