Air knife mechanism for coating machine

Abstract

The utility model provides an air knife mechanism for a coating machine, which comprises a sliding table, an air knife and an adjusting component, two ends of the air knife are connected with the sliding table, and the adjusting component is connected to one side of the sliding table; a first control part is arranged on the sliding table and can drive the air knife to move on the sliding table; the adjusting assembly comprises a second control part and a transmission shaft, one end of the transmission shaft is connected with the second control part, the other end of the transmission shaft is connected with the sliding table, and the second control part can drive the air knife to move through the transmission shaft. According to the air knife mechanism provided by the utility model, the distance and the angle of the air knife are respectively adjusted by arranging the first control part and the second control part, so that the air knife mechanism can adapt to the coating requirements of various different perovskite solutions, and the compatibility is higher; and in addition, the device can adapt to different coating thicknesses, the drying and crystallizing effect on the thin film is better, and defective products are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of coating machine drying equipment, in particular to an air knife mechanism used for a coating machine. Background Art

[0002] Coating equipment is a device that can form a coating on the surface of a substrate, and is commonly used in the fields of chip manufacturing, display manufacturing, solar cell manufacturing, or lithium battery manufacturing. Coating equipment usually uses slit coating, spin coating, or scraping to coat a layer of wet film on the surface of the substrate, and the wet film can form a coating or coating after drying; for example, in the perovskite photovoltaic cell manufacturing industry, a perovskite solution is coated on the substrate by a coating device, and then a high-intensity airflow blown out by a wind knife mechanism forms an air curtain, thereby quickly drying the perovskite solution.

[0003] For example, Chinese patent CN220092017U discloses a perovskite film drying device and a perovskite film preparation system; it mainly achieves the drying of the film by setting a wind knife mechanism above the perovskite film and blowing air to the perovskite film through the air outlet of the wind knife mechanism. However, in this structure, since the position of the wind knife mechanism is relatively fixed, when the coating thickness and coating speed change, it is usually necessary to adaptively adjust the position angle of the wind knife. This fixed structure means that when the angle needs to be changed, it can only be achieved by dismantling the wind knife frame, and the wind knife cannot be adjusted, resulting in poor drying effect and high product defect rate.

[0004] Therefore, it is necessary to improve the existing technology and provide a wind knife mechanism that can adjust the wind knife air outlet angle. Utility Model Content

[0005] In view of the deficiencies of the prior art, the utility model provides an air knife mechanism for a coating machine which has a simple structure and can adjust the air outlet angle and distance of the air knife.

[0006] In order to solve the above-mentioned technical problems, the technical solution used in the utility model is: a wind knife mechanism for a coating machine, comprising a slide, a wind knife and an adjustment component, the two ends of the wind knife are connected to the slide, and the adjustment component is connected to one side of the slide; a first control unit is provided on the slide, and the first control unit can drive the wind knife to move on the slide; the adjustment component comprises a second control unit and a transmission shaft, one end of the transmission shaft is connected to the second control unit, and the other end is connected to the slide, and the second control unit can drive the wind knife to move through the transmission shaft.

[0007] Preferably, the slide includes a base plate, a guide rod and a slide plate connected in sequence, and both ends of the wind knife are connected to the slide plate; the first control part includes a first driving member and a control rod, one end of the control rod is connected to the first driving member, and the other end is connected to the slide plate, the first driving member is arranged on the base plate, and the first driving member can drive the wind knife to slide on the guide rod through the control rod.

[0008] Preferably, the first control part also includes a locking piece, which is arranged between the first driving piece and the control rod, and the locking piece includes a locking block, on which a first through hole is provided, and one end of the control rod passes through the first through hole and is connected to the driving part; the locking block is split at its end to form a first locking block and a second locking block, and an opening connected to the first through hole is provided between the first locking block and the second locking block, and a first locking hole is provided on the first locking block and the second locking block, and the first locking block and the second locking block can be locked through the first locking hole to close the opening, so that the locking piece locks the control rod.

[0009] Preferably, the adjustment component also includes a fixed plate, which is located on both sides of the slide, and the transmission shaft includes a driving shaft and a driven shaft, which are respectively located on both sides of the slide, one end of the driving shaft and the driven shaft are connected to the bottom plate of the slide, and the other ends of the driving shaft and the driven shaft are respectively connected to the fixed plate; the second control unit includes a second driving member, and the end of the driving shaft away from the slide is also connected to the second driving member, and the second driving member can drive the slide and the driven shaft to move in sequence through the driving shaft.

[0010] Preferably, the driving shaft and the driven shaft are also respectively provided with fasteners, the fasteners are fixed to the fixing plate, the fasteners include a fastening block and a fastening bolt, the fastening block is provided with a second through hole, one end of the driving shaft and the driven shaft respectively passes through the second through hole, the fastening block is split at its end to form a first clamping block and a second clamping block, a gap connected to the second through hole is provided between the first clamping block and the second clamping block, a second locking hole is provided on the first clamping block and the second clamping block, the fastening bolt can be inserted into the second locking hole to close the gap, so that the fastener locks the driving shaft and the driven shaft.

[0011] Preferably, an air cavity is provided in the wind knife, and an air inlet and an air outlet are provided on the wind knife, and the air inlet, the air cavity and the air outlet are connected in sequence; the air cavity and the air outlet are both arranged along the length direction of the wind knife.

[0012] Preferably, the wind knife includes a first blade plate and a second blade plate, and a first groove is provided on the inner wall of the first blade plate and the second blade plate. When the first blade plate and the second blade plate are connected, the first grooves of the first blade plate and the second blade plate are connected to form the wind cavity; the air inlet is arranged on the first blade plate, or the air inlet is arranged on the second blade plate.

[0013] Preferably, a second groove is further provided on the inner walls of the first blade plate and the second blade plate, and the first groove is spaced apart from the second groove. When the first blade plate and the second blade plate are connected, the second grooves of the first blade plate and the second blade plate are connected to form a first uniform air chamber, and the first uniform air chamber is located between the air chamber and the air outlet.

[0014] Preferably, a third groove is further provided on the inner walls of the first blade plate and the second blade plate. When the first blade plate and the second blade plate are connected, the third grooves of the first blade plate and the second blade plate are connected to form a second uniform wind chamber, and the second uniform wind chamber is located between the first uniform wind chamber and the air outlet.

[0015] Preferably, the air inlet, the air cavity, the first uniform air cavity, the second uniform air cavity and the air outlet are connected in sequence, and the air cavity, the first uniform air cavity, the second uniform air cavity and the air outlet are all arranged on the same axis.

[0016] The beneficial effects of the utility model are mainly reflected in: the wind knife mechanism provided by the utility model can adjust the distance and angle of the wind knife respectively by setting the first control unit and the second control unit, so it can adapt to the coating requirements of various different perovskite solutions and has greater compatibility; and it can adapt to different coating thicknesses, has a better drying and crystallization effect on the film, and reduces the generation of defective products. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other purposes, features and advantages of the present invention will become more apparent through a more specific description of the preferred embodiments of the present invention shown in the accompanying drawings. The same reference numerals in all the accompanying drawings indicate the same parts, and the drawings are not intentionally scaled to the actual size, but the focus is on illustrating the subject matter of the present invention.

[0018] Figure 1 This is a schematic diagram of the structure of the stroke knife mechanism of the utility model from the first perspective;

[0019] Figure 2 This is a second perspective structural diagram of the stroke knife mechanism of the utility model;

[0020] Figure 3 This is a schematic diagram of the connection mechanism between the wind knife and the slide table in the utility model;

[0021] Figure 4 for Figure 3A schematic diagram of the partially enlarged structure of part A;

[0022] Figure 5 It is a schematic diagram of the explosion mechanism of the stroke knife of the utility model;

[0023] Figure 6 It is a schematic diagram of the cross-sectional structure of the stroke knife of the utility model;

[0024] In the figure: slide 1, base plate 10, guide rod 11, slide plate 12, wind knife 2, wind chamber 21, air inlet 22, air outlet 23, first blade 24, second blade 25, first uniform air chamber 26, second uniform air chamber 27, first groove 201, second groove 202, third groove 203, second control unit 30, second driving member 301, active shaft 310, driven shaft 311, fixing plate 32, fastener 33, first control unit 4, first driving member 40, control rod 41, locking member 42, first locking block 421, second locking block 422, opening 423, first locking hole 424. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings.

[0026] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to another element and integrated therewith, or there may be an intermediate element at the same time. The terms "installed", "one end", "the other end" and similar expressions used herein are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art. The terms used in the specification herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0028] refer to Figure 1-6 The utility model provides a wind knife 2 mechanism for a coating machine, comprising a slide 1, a wind knife 2 and an adjusting component, wherein both ends of the wind knife 2 are connected to the slide 1, and the adjusting component is connected to one side of the slide 1; a first control unit 4 is provided on the slide 1, and the first control unit 4 can drive the wind knife 2 to move on the slide 1; the adjusting component comprises a second control unit 30 and a transmission shaft, wherein one end of the transmission shaft is connected to the second control unit 30, and the other end is connected to the slide 1, and the second control unit 30 can drive the wind knife 2 to move via the transmission shaft.

[0029] The wind knife 2 mechanism provided by the utility model is integrally connected to the two ends of the coating equipment frame, and the two ends of the wind knife 2 are movably connected to the slide 1. When in use, the wind knife 2 can be driven to move up and down on the slide 1 by the first control unit 4, so as to adjust the distance between the wind knife 2 and the film. Specifically, according to the change of the film coating speed or the coating thickness, when the wind knife 2 needs to be closer to the film, the wind knife 2 can be driven to descend by the first control unit 4; and when the distance between the wind knife 2 and the film needs to be farther, the wind knife 2 can be driven to ascend by the first control unit 4 (the descent / ascent referred to here can refer to Figure 1 , from the first perspective, the direction of the coordinate axis Y is rising, and vice versa). In addition, the air outlet angle of the wind knife 2 can be adjusted by the second control unit 30 and the transmission shaft. The second control unit 30 can drive the transmission shaft to rotate, and one end of the transmission shaft is connected to the slide 1. Therefore, when the transmission shaft rotates, it also drives the slide 1 to move, and then drives the wind knife 2 to move forward and backward. Figure 1 The forward and backward movement referred to here refers to the reciprocating motion in the direction of the coordinate axis Z.

[0030] Compared with the existing ones, the wind knife 2 mechanism provided by the utility model has the following beneficial effects:

[0031] By setting the first control unit 4 and the second control unit 30, the distance between the wind knife 2 and the film, as well as the wind outlet angle of the wind knife 2 can be adjusted accordingly according to actual needs, so it can adapt to the coating requirements of a variety of different perovskite solutions, with greater compatibility; and it can adapt to different coating thicknesses, and has a better drying and crystallization effect on the film. In the past, the wind knife 2 could not be controlled in terms of distance and angle, resulting in the film being dried only at one coating speed during the coating process. Now, through improvements, even if the coating speed is increased, the film can be dried quickly by changing the distance or angle of the wind knife 2, further improving production efficiency.

[0032] refer to Figure 3 and 4 In a preferred embodiment, the slide 1 includes a bottom plate 10, a guide rod 11 and a slide plate 12 connected in sequence, and both ends of the wind knife 2 are connected to the slide plate 12; the first control part 4 includes a first driving member 40 and a control rod 41, one end of the control rod 41 is connected to the first driving member 40, and the other end is connected to the slide plate 12. The first driving member 40 is arranged on the bottom plate 10, and the first driving member 40 can drive the wind knife 2 to slide on the guide rod 11 through the control rod 41. Figure 3The first driving member 40 can be a rotating handle, and its output end is connected to the control rod 41. By rotating the rotating handle in the counterclockwise / clockwise direction, the control rod 41 can be controlled to move up and down. When the control rod 41 moves up and down, it also drives the slide plate 12, and then drives the wind knife 2 to move up and down on the guide rod 11. In this embodiment, the driving method of the rotating handle can realize the precise adjustment or fine-tuning of the distance between the wind knife 2 and the film, and the cost is also lower. Of course, a driving source such as a servo motor can also be used, as long as the wind knife 2 can be driven. In a further preferred embodiment, a digital display is also provided on the slide 1, such as Figure 4 As shown, the digital display is arranged between the rotating handle and the locking member 42; for example, before adjusting the distance of the wind knife 2, the initial value on the digital display is recorded first, and after adjusting the distance of the wind knife 2, the current value on the digital display is recorded again, and by comparing the current value with the initial value, the distance moved by the wind knife 2 can be obtained.

[0033] refer to Figure 4 In a preferred embodiment, the first control part 4 also includes a locking piece 42, which is arranged between the driving part and the control rod 41. The locking piece 42 includes a locking block, and a first through hole (not shown) is opened on the locking block. One end of the control rod 41 passes through the first through hole and is connected to the driving part; the locking block is split at its end to form a first locking block 421 and a second locking block 422, and an opening 423 connected to the first through hole is provided between the first locking block 421 and the second locking block 422. The first locking block 421 and the second locking block 422 are both provided with a first locking hole 424, and the first locking block 421 and the second locking block 422 can be locked through the first locking hole 424 to close the opening 423, so that the locking piece 42 locks the control rod 41.

[0034] refer to Figure 4 The first locking block 421 and the first locking block 422 can be locked by a locking bolt. During use, when the distance of the wind knife 2 needs to be adjusted, the bolt can be loosened first to open the opening 423, so that the control rod 41 can move relatively in the first through hole; when the distance adjustment of the wind knife 2 is completed, the locking bolt is tightened to close the opening 423, so that the locking piece 42 locks the control rod 41 to prevent the wind knife 2 from being displaced during operation; and a grip handle is provided on one end of the locking bolt, so that the operator can tighten or loosen the bolt by gripping the handle.

[0035] refer to Figure 1 and 2In a preferred embodiment, the adjustment component also includes a fixed plate 32, which is located on both sides of the slide 1. The transmission shaft includes a driving shaft 310 and a driven shaft 311, which are respectively located on both sides of the slide 1. One end of the driving shaft 310 and the driven shaft 311 are connected to the bottom plate 10 of the slide 1, and the other ends of the driving shaft 310 and the driven shaft 311 are respectively connected to the fixed plate 32; the second control unit 30 includes a second driving member 301, and the end of the driving shaft 310 away from the slide 1 is also connected to the second driving member 301, and the second driving member 301 can drive the slide 1 and the driven shaft 311 to move in sequence through the driving shaft 310.

[0036] In this embodiment, the second driving member 301 can be a handwheel, the slide 1 includes a left slide 1 and a right slide 1, the wind knife 2 is connected between the left slide 1 and the right slide 1, one end of the driving shaft 310 passes through the fixed plate 32 and is connected to the handwheel, and the other end of the driving shaft 310 is rotatably connected to the left slide 1; when in use, the handwheel is rotated clockwise / counterclockwise to drive the driving shaft 310 to rotate, and the driving shaft 310 also drives the slide 1 to move while rotating, thereby driving the wind knife 2 to move back and forth and change the angle. The driven shaft 311 mainly plays the role of balancing and supporting the wind knife 2 and the slide 1; in a further preferred embodiment, one end of the driven shaft 311 can be fixedly connected or rotatably connected to the right slide 1. When one end of the driven shaft 311 is fixedly connected to the right slide 1, the other end is rotatably connected to the fixed plate 32, and the fixed plate 32 is also fixed to the frame; when one end of the driven shaft 311 is rotatably connected to the right slide 1, the other end is fixedly connected to the fixed plate 32; thereby, the handwheel can smoothly drive the wind knife 2 to move back and forth and adjust the angle.

[0037] Similarly, by using a hand wheel as the driving method of the active shaft 310, on the one hand, it is possible to perform precise adjustment or fine-tuning, and on the other hand, the cost is also low; of course, other driving methods (such as servo motors, etc.) can also be used as long as the rotation of the active shaft 310 can be achieved. In a further preferred embodiment, at least one display meter is provided on the fixed plate 32. For example, before adjusting the angle of the wind knife 2, the initial value on the display meter is recorded first, and after adjusting the angle of the wind knife 2, the current value on the display meter is recorded again. By comparing the two recorded values, the rotation angle of the wind knife 2 can be obtained.

[0038] refer to Figure 1 and 2In a preferred embodiment, fasteners 33 are also provided on the driving shaft 310 and the driven shaft 311, respectively. The fasteners 33 are fixed to the fixing plate 32. The fasteners 33 include a fastening block and a fastening bolt. The fastening block is provided with a second through hole. One end of the driving shaft 310 and the driven shaft 311 pass through the second through hole respectively. The fastening block is split at its end to form a first clamping block and a second clamping block. There is a gap between the first clamping block and the second clamping block that is connected to the second through hole. The first clamping block and the second clamping block are both provided with a second locking hole. The fastening bolt can be inserted into the second locking hole to close the gap, so that the fastener 33 locks the driving shaft 310 and the driven shaft 311. The fastener 33 in this embodiment has the same structure as the locking member 42 described above. For the structure of the fastener 33, reference can be made to Figure 4 The structure of the locking member 42 in the middle; the locking methods of the two are also the same and will not be described here. During use, when the angle of the wind knife 2 needs to be adjusted, the fastening bolt can be loosened first, at which time the driving shaft 310 and the driven shaft 311 can move relative to each other in the second through hole, that is, they can rotate normally; after the angle adjustment of the wind knife 2 is completed, the fastening bolt is tightened again, so that the fastener 33 locks the driving shaft 310 and the driven shaft 311, at which time the driving shaft 310 and the driven shaft 311 cannot rotate, thereby avoiding shaking of the wind knife 2 during operation.

[0039] refer to Figure 5 and 6 In a preferred embodiment, an air cavity 21 is provided in the air knife 2, and an air inlet 22 and an air outlet 23 are provided on the air knife 2. The air inlet 22, the air cavity 21, and the air outlet 23 are sequentially connected; the air cavity 21 and the air outlet 23 are arranged along the length direction of the air knife 2. The air inlet 22 is connected to an external hot air device, and the air outlet 23 of the air knife 2 is arranged toward the film, so that the hot air is transported toward the film to dry the solution on the film.

[0040] refer to Figure 5 In a preferred embodiment, the wind knife 2 includes a first blade plate 24 and a second blade plate 25, and the first blade plate 24 and the second blade plate 25 are both provided with a first groove 201 on their inner walls. When the first blade plate 24 and the second blade plate 25 are connected, the first grooves 201 of the first blade plate 24 and the second blade plate 25 are connected to form a wind cavity 21; the air inlet 22 is provided on the first blade plate 24, or the air inlet 22 is provided on the second blade plate 25. In this embodiment, the first blade plate 24 and the second blade plate 25 can be detachably connected to facilitate subsequent maintenance work and convenient disassembly and assembly; or they can be integrally arranged to prevent the hidden danger of air leakage.

[0041] refer to Figure 5 and 6In a preferred embodiment, a second groove 202 is further provided on the inner wall of the first blade plate 24 and the second blade plate 25. The first groove 201 and the second groove 202 are arranged at intervals. When the first blade plate 24 and the second blade plate 25 are connected, the second grooves 202 of the first blade plate 24 and the second blade plate 25 are connected to form a first uniform air chamber 26. The first uniform air chamber 26 is arranged at intervals between the wind chamber 21 and the air outlet 23. There are gaps for gas flow between the wind chamber 21 and the first uniform air chamber 26, and between the first uniform air chamber 26 and the air outlet 23, so that hot air can smoothly reach the first uniform air chamber 26 through the wind chamber 21, and then blown out from the air outlet 23; the air flow can be more uniform by providing the first uniform air chamber 26.

[0042] refer to Figure 5 and 6 In a preferred embodiment, a third groove 203 is further formed on the inner wall of the first blade plate 24 and the second blade plate 25. When the first blade plate 24 and the second blade plate 25 are connected, the third grooves 203 of the first blade plate 24 and the second blade plate 25 are connected to form a second uniform air chamber 27. The second uniform air chamber 27 is located between the first uniform air chamber 26 and the air outlet 23. Similarly, by adding the second uniform air chamber 27 between the first uniform air chamber 26 and the air outlet 23, the uniformity of the airflow is further improved.

[0043] refer to Figure 6 In a preferred embodiment, the air inlet 22, the air cavity 21, the first uniform air cavity 26, the second uniform air cavity 27 and the air outlet 23 are connected in sequence, and the air cavity 21, the first uniform air cavity 26, the second uniform air cavity 27 and the air outlet 23 are all arranged on the same axis.

[0044] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An air knife mechanism for a coating machine, characterized in that: It includes a slide, a wind knife and an adjustment component, wherein both ends of the wind knife are connected to the slide, and the adjustment component is connected to one side of the slide; a first control unit is provided on the slide, and the first control unit can drive the wind knife to move on the slide; the adjustment component includes a second control unit and a transmission shaft, wherein one end of the transmission shaft is connected to the second control unit, and the other end is connected to the slide, and the second control unit can drive the wind knife to move via the transmission shaft.

2. The air knife mechanism according to claim 1, characterized in that: The slide includes a base plate, a guide rod and a slide plate connected in sequence, and both ends of the wind knife are connected to the slide plate; the first control part includes a first driving member and a control rod, one end of the control rod is connected to the first driving member, and the other end is connected to the slide plate, the first driving member is arranged on the base plate, and the first driving member can drive the wind knife to slide on the guide rod through the control rod.

3. The air knife mechanism according to claim 2, characterized in that: The first control part also includes a locking piece, which is arranged between the first driving piece and the control rod, and the locking piece includes a locking block, a first through hole is opened on the locking block, and one end of the control rod passes through the first through hole and is connected to the driving part; the locking block is split at its end to form a first locking block and a second locking block, an opening connected to the first through hole is provided between the first locking block and the second locking block, and a first locking hole is provided on the first locking block and the second locking block, and the first locking block and the second locking block can be locked through the first locking hole to close the opening, so that the locking piece locks the control rod.

4. The air knife mechanism according to claim 1, characterized in that: The adjusting assembly also includes a fixed plate, which is located on both sides of the slide. The transmission shaft includes a driving shaft and a driven shaft, which are respectively located on both sides of the slide. One end of the driving shaft and the driven shaft are connected to the bottom plate of the slide, and the other ends of the driving shaft and the driven shaft are respectively connected to the fixed plate. The second control unit includes a second driving member, and one end of the driving shaft away from the slide is also connected to the second driving member. The second driving member can drive the slide and the driven shaft to move in sequence through the driving shaft.

5. The wind knife mechanism according to claim 4, characterized in that: The driving shaft and the driven shaft are also respectively provided with fasteners, which are fixed to the fixing plate. The fasteners include a fastening block and a fastening bolt. The fastening block is provided with a second through hole, and one end of the driving shaft and the driven shaft pass through the second through hole respectively. The fastening block is split at its end to form a first clamping block and a second clamping block. There is a gap between the first clamping block and the second clamping block that is connected to the second through hole. The first clamping block and the second clamping block are both provided with a second locking hole. The fastening bolt can be inserted into the second locking hole to close the gap, so that the fastener locks the driving shaft and the driven shaft.

6. The wind knife mechanism according to claim 1, characterized in that: An air cavity is arranged in the wind knife, and an air inlet and an air outlet are arranged on the wind knife. The air inlet, the air cavity and the air outlet are connected in sequence; the air cavity and the air outlet are arranged along the length direction of the wind knife.

7. The wind knife mechanism according to claim 6, characterized in that: The wind knife includes a first blade plate and a second blade plate, and a first groove is opened on the inner wall of the first blade plate and the second blade plate. When the first blade plate and the second blade plate are connected, the first grooves of the first blade plate and the second blade plate are connected to form the wind cavity; the air inlet is arranged on the first blade plate, or the air inlet is arranged on the second blade plate.

8. The air knife mechanism according to claim 7, characterized in that: A second groove is also provided on the inner wall of the first blade plate and the second blade plate, and the first groove is spaced apart from the second groove. When the first blade plate and the second blade plate are connected, the second grooves of the first blade plate and the second blade plate are connected to form a first uniform air chamber, and the first uniform air chamber is located between the air chamber and the air outlet.

9. The air knife mechanism according to claim 8, characterized in that: A third groove is also provided on the inner walls of the first blade plate and the second blade plate. When the first blade plate and the second blade plate are connected, the third grooves of the first blade plate and the second blade plate are connected to form a second uniform wind chamber, and the second uniform wind chamber is located between the first uniform wind chamber and the air outlet.

10. The air knife mechanism according to claim 9, characterized in that: The air inlet, the air cavity, the first uniform air cavity, the second uniform air cavity and the air outlet are connected in sequence, and the air cavity, the first uniform air cavity, the second uniform air cavity and the air outlet are all arranged on the same axis.

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