Air nozzle structure and coating machine

Abstract

The utility model provides an air nozzle structure and a coating machine, and relates to the technical field of pole piece processing. A tuyere structure comprises a tuyere body, a sealing cover part and a fixing mechanism. An air guide cavity is defined by the tuyere body, an air inlet, an air outlet and a tuyere opening which are communicated with the air guide cavity are formed in the tuyere body, and the air outlet and the tuyere opening are formed in the air outlet side of the tuyere body; the sealing cover part is movably arranged on the air outlet side of the tuyere main body, the sealing cover part shields the tuyere opening and the air outlet in a preset area, and the sealing cover part stretches across the tuyere main body in the width direction of the air outlet side; and the fixing mechanism is configured to enable the sealing cover part to be fixed at different positions in the length direction of the tuyere main body. The drying speed of the coating and thinning area can be reduced through the sealing cover part, so that the drying speed of the coating and thinning area tends to be consistent with the drying speed of the normal coating area, the cracking risk is reduced, and the yield of the pole piece is improved.

Description

Technical Field

[0001] This utility model relates to the field of electrode processing technology, specifically to a nozzle structure and a coating machine. Background Technology

[0002] With the rapid development of the new energy industry and the continuous improvement of battery technology, the market is placing increasingly higher demands on battery capacity and cycle performance. The battery technology field also requires higher energy density, leading to higher requirements for the coating density of the positive and negative electrodes. However, this increased coating density also presents new challenges to the manufacturing process. The coating edges, located near the foil edges, are thinned at the edges, resulting in faster drying and making them more prone to cracking in the positive and negative electrode coatings.

[0003] The coating process mainly involves applying the slurry onto the electrode sheet, followed by drying the coated area using specific oven parameters and curves. Oven drying primarily utilizes hot air from a heating pack, which acts on the film area through the oven body and nozzles. Currently, the nozzle design is a generic design, and the drying process is a comprehensive drying process. This can cause cracking in areas with thin coating density or surface areas due to the rapid drying rate. Utility Model Content

[0004] In view of the problems existing in the prior art, the present invention provides a nozzle structure and a coating machine to improve the problem of cracking caused by the fast drying rate in areas with thin coating density.

[0005] To achieve the above and other related objectives, the first aspect of this utility model provides a nozzle structure, including a nozzle body, a cover, and a fixing mechanism. The nozzle body forms an air guide cavity, and the nozzle body is provided with an air inlet, an air outlet, and a nozzle opening communicating with the air guide cavity. The air outlet and the nozzle opening are located on the air outlet side of the nozzle body. The cover is movably disposed on the air outlet side of the nozzle body, and the cover covers the nozzle opening and the air outlet in a predetermined area. The cover spans the nozzle body across the width direction of the air outlet side. The fixing mechanism is configured to fix the cover at different positions along the length direction of the nozzle body.

[0006] In an exemplary embodiment of this application, the cover includes a plurality of air nozzle plugs, the air nozzle plugs being disposed on the side of the cover facing the air nozzle opening, the air nozzle plugs matching the air nozzle opening to block the air nozzle opening.

[0007] In an exemplary embodiment of this application, the cover includes an elastic region, which is at least disposed in the area of ​​the cover that blocks the nozzle opening, and the nozzle plug is disposed in the elastic region.

[0008] In an exemplary embodiment of this application, the fixing mechanism includes two slide rails and a movable block. The two slide rails are disposed on both sides of the nozzle body and extend along the length direction of the nozzle body; the movable block matches the slide rails and is disposed at both ends of the cover portion.

[0009] In an exemplary embodiment of this application, the fixing mechanism includes a tightening nut and a tightening shaft. The tightening nut is disposed on the nozzle body and / or the slide rail, and a plurality of the tightening nuts are arranged along the length direction of the nozzle body; the tightening shaft is movably disposed on the cover portion and / or the moving block, and the tightening shaft cooperates with the tightening nut to fix the cover portion to the nozzle body.

[0010] In an exemplary embodiment of this application, the fixing mechanism includes a limiting hole and a limiting shaft. The limiting hole is disposed on the slide rail and / or the nozzle body, and a plurality of the limiting holes are arranged along the length direction of the nozzle body; the limiting shaft is disposed on the moving block and / or the cover portion, the limiting shaft is movably connected to the moving block, and the limiting shaft cooperates with the limiting hole to fix the cover portion to the nozzle body.

[0011] In an exemplary embodiment of this application, the preset area is matched with the coating thinning area.

[0012] In an exemplary embodiment of this application, the nozzle structure includes a filter screen disposed within the air guide cavity and parallel to the air outlet side.

[0013] In an exemplary embodiment of this application, the cover portion includes a handle portion, which is disposed at both ends of the cover portion.

[0014] A second aspect of this utility model provides a coating machine, including the nozzle structure described in any one of the above descriptions.

[0015] In combination with existing technologies, the beneficial effects of this application are as follows:

[0016] Existing oven nozzles use a universal design, with the same airflow velocity across all zones. The coating thinning zone dries quickly due to the thinner coating powder, while the normal coating zone dries more slowly due to the normal coating powder. This inconsistent drying speed leads to cracking. The nozzle structure of this application includes a nozzle body, a sealing part, and a fixing mechanism. The nozzle body has an air outlet and a nozzle opening on its air outlet side. The sealing part is located on the air outlet side of the nozzle body, thus blocking the air outlet and nozzle opening of a preset zone, thereby reducing the airflow in the preset zone and lowering the drying speed of that zone. By reducing the drying speed of the coating thinning zone through the sealing part, the drying speed of the coating thinning zone and the normal coating zone becomes more consistent, reducing the risk of cracking and improving the electrode yield.

[0017] The coating thinning zone penetrates the electrode sheet and crosses the nozzle body along the width direction of the nozzle body through the capping part, so that the preset area blocked by the capping part is consistent with the coating thinning zone, effectively making the drying rate of the coating thinning zone and the normal coating zone tend to be consistent.

[0018] Depending on the specifications of the electrode, the position of the coating thinning zone in the oven is also different. The sealing part can be fixed at different positions along the length of the air nozzle body by the fixing mechanism, thereby meeting the drying needs of the coating thinning zone at different positions, improving the application range of the sealing part, and meeting the drying needs of different electrode coatings. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a side view schematic diagram of an exemplary nozzle structure of this utility model;

[0021] Figure 2 This is a cross-sectional front view of another exemplary nozzle structure of this utility model.

[0022] Component designation explanation:

[0023] 100. Air nozzle body; 110. Air guide cavity; 120. Air outlet; 130. Air nozzle opening; 140. Air outlet side;

[0024] 200. Cover section; 210. Nozzle plug; 220. Elastic zone;

[0025] 300. Fixing mechanism; 310. Slide rail; 320. Moving block; 330. Tightening nut; 340. Tightening shaft; 350. Limiting hole; 360. Limiting shaft;

[0026] 400. Filter screen;

[0027] 500, Coating thinning zone. Detailed Implementation

[0028] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. It should also be understood that the terminology used in the embodiments of this utility model is for describing specific implementation schemes and not for limiting the scope of protection of this utility model. Test methods in the following embodiments that do not specify specific conditions are generally performed under conventional conditions or according to the conditions recommended by the respective manufacturers.

[0029] When numerical ranges are given in the embodiments, it should be understood that, unless otherwise specified in this invention, both endpoints of each numerical range and any value between the two endpoints may be selected. Unless otherwise defined, all technical and scientific terms used in this invention, as well as the prior art known to those skilled in the art and the description of this invention, may be implemented using any prior art methods, equipment, and materials similar to or equivalent to those in the embodiments of this invention.

[0030] It should be noted that the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Any changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of implementation of this utility model.

[0031] Please see Figures 1 to 2 The first aspect of this utility model provides a nozzle structure, which includes a nozzle body 100, a cover portion 200, and a fixing mechanism 300. The nozzle body 100 forms an air guiding cavity 110. The nozzle body 100 is provided with an air inlet, an air outlet 120, and a nozzle opening 130 communicating with the air guiding cavity 110. The air inlet is used to deliver air into the air guiding cavity 110, and the air outlet 120 and the nozzle opening 130 blow air out of the air guiding cavity 110. The air outlet 120 and the nozzle opening 130 are located on the air outlet side 140 of the nozzle body 100, which is the side of the nozzle body 100 closest to the electrode sheet, for coating and drying the electrode sheet. A cover portion 200 is movably disposed on the air outlet side 140 of the nozzle body 100. The cover portion 200 covers the nozzle opening 130 and the air outlet 120 in a predetermined area. The cover portion 200 spans the nozzle body 100 along the width direction of the air outlet side 140. The fixing mechanism 300 fixes the cover portion 200 at different positions along the length direction of the nozzle body 100.

[0032] The sealing portion 200 of this application is disposed on the air outlet side 140 of the nozzle body 100, thereby blocking the air outlet 120 and the nozzle opening 130 of the preset area, thereby reducing the air volume in the preset area and reducing the drying speed of the area corresponding to the preset area. By reducing the drying speed of the coating thinning area 500 through the sealing portion 200, the drying speed of the coating thinning area 500 is made to be more consistent with that of the normal coating area, reducing the risk of cracking and improving the electrode yield.

[0033] The coating thinning zone 500 penetrates the electrode sheet and crosses the nozzle body 100 along the width direction of the nozzle body 100 through the capping part 200, so that the preset area covered by the capping part 200 is consistent with the coating thinning zone 500, effectively making the drying rate of the coating thinning zone 500 and the normal coating zone tend to be consistent.

[0034] Depending on the specifications of the electrode, the position of the coating thinning zone 500 in the oven is also different. The sealing part 200 can be fixed at different positions along the length of the air nozzle body 100 by the fixing mechanism 300, thereby meeting the drying needs of the coating thinning zone 500 at different positions, improving the application range of the sealing part 200, and meeting the drying needs of different electrode coatings.

[0035] Multiple air nozzles 130 are provided. For example, the air nozzles 130 are arranged in a straight array along the length of the air nozzle body 100 or along the width of the air nozzle body 100, so as to ensure the uniformity and stability of air volume in each area and ensure the uniformity of drying.

[0036] Please see Figure 1 and Figure 2 The cover 200 blocks multiple air nozzles 130 within a preset area. The cover 200 spans the air nozzle body 100 along the width direction of the air outlet side 140, so the cover 200 can block one or more rows of air nozzles 130 in the width direction of the air outlet side 140.

[0037] Please see Figure 2 Air outlets 120 are located on both sides of the nozzle 130 and extend along the length of the air guide cavity 110. Air outlets 120 discharge air from both sides of the air outlet side 140. The cover 200 blocks the air outlet 120 area within the preset area to reduce the air discharge from the air outlet 120 area.

[0038] Please see Figure 2In one embodiment, the sealing portion 200 includes a plurality of air nozzle plugs 210. The air nozzle plugs 210 are disposed on the side of the sealing portion 200 facing the air nozzle opening 130, and the air nozzle plugs 210 match the air nozzle opening 130 to seal it. When the sealing portion 200 does not fit tightly with the air outlet side 140, air from the air nozzle opening 130 in the blocked area will be blown out through the gap between the sealing portion 200 and the air outlet side 140, thereby increasing the airflow on both sides of the blocked area and causing the drying speed to be too fast. By sealing the air nozzle opening 130 with the air nozzle plugs 210, airflow from the air nozzle opening 130 can be effectively prevented, thus avoiding the increase in airflow on both sides of the blocked area, ensuring that the drying efficiency of each drying area is consistent or substantially consistent, and reducing the risk of coating cracking.

[0039] Please see Figure 2 In one embodiment, the nozzle plug 210 is plugged into the nozzle opening 130. The nozzle opening 130 is sealed by inserting the nozzle plug 210 into it, thus ensuring the sealing effect.

[0040] The nozzle plug 210 can be made of rubber, silicone, plastic, or other materials with elastic deformation. On the one hand, it can ensure the sealing effect of the nozzle plug 210 on the nozzle opening 130 and improve the sealing performance of the nozzle plug 210 on the nozzle opening 130. On the other hand, the interference fit between the elastically deformable nozzle plug 210 and the nozzle opening 130 can increase the friction between the nozzle plug 210 and the nozzle opening 130 and reduce the occurrence of the wind blowing the nozzle plug 210 out of the nozzle opening 130.

[0041] Of course, as some alternatives, the nozzle plug 210 can also be made of hard materials such as metal or hard plastic, with a rubber sealing ring or other sealing element with sealing effect on the outer periphery, so as to ensure the sealing effect of the nozzle plug 210 on the nozzle opening 130, while ensuring the tightness of the fit between the nozzle plug 210 and the nozzle opening 130, and reducing the risk of the nozzle plug 210 coming off.

[0042] Please see Figure 2In one embodiment, the cover portion 200 includes an elastic region 220, which is at least disposed in the area of ​​the cover portion 200 that covers the nozzle opening 130, and the nozzle plug 210 is disposed in the elastic region 220. The nozzle openings 130 are arranged in a relatively regular manner, and the distance between the nozzle openings 130 remains stable. However, due to the influence of processing precision, or the influence of wear and deformation caused by long-term use, or the influence of wear on the fixed area between the cover portion 200 and the nozzle body 100, the nozzle plug 210 and the nozzle opening 130 cannot be completely matched. Some nozzle plugs 210 are slightly misaligned with the nozzle opening 130, causing the nozzle plug 210 to fail to accurately seal on the nozzle opening 130. By setting the elastic zone 220 and placing the nozzle plug 210 in the elastic zone 220, the distance between the nozzle plugs 210 can be adjusted during use, so that the nozzle plug 210 can accurately match the nozzle opening 130, thereby sealing the nozzle opening 130 with the nozzle plug 210, ensuring accurate alignment and good sealing.

[0043] The elastic region 220 can achieve elastic deformation through the material itself, such as rubber or polymer materials with elastic deformation. The elastic region 220 can also achieve elastic deformation through its structure, such as a mesh structure or other structures capable of tensile deformation. To ensure that the elastic region 220 can expand and contract, the relative position of the nozzle plug 210 changes, allowing the nozzle plug 210 to fit into the nozzle opening 130.

[0044] Other areas of the cover portion 200 can be elastically deformable areas or inelastically deformable areas. The cover portion 200 needs to meet the requirements of blocking the air outlet 120 and being relatively fixed to the air nozzle body 100.

[0045] Please see Figure 1 In one embodiment, the fixing mechanism 300 includes two slide rails 310 and a moving block 320.

[0046] Two slide rails 310 are disposed on both sides of the nozzle body 100, and the slide rails 310 extend along the length direction of the nozzle body 100.

[0047] The slide rail 310 can be in various forms, such as a slide rail 310 with a concave cross section, an I-shaped slide rail 310, or a column-shaped slide rail 310.

[0048] The slide rail 310 can be fixed to the nozzle body 100 by bolt connection, welding connection, or other fixed connection methods.

[0049] The movable block 320 is matched with the slide rail 310. For example, when the slide rail 310 is an I-shaped slide rail 310, the movable block 320 has a square structure with a groove inside the square structure that is adapted to the I-shaped slide rail 310, so that the movable block 320 can slide smoothly along the slide rail 310; when the slide rail 310 is a concave slide rail 310, the movable block 320 has a shape that is adapted to the concave shape, so that the movable block 320 can slide smoothly along the slide rail 310.

[0050] The movable block 320 slides along the slide rail 310, thereby adjusting the position of the cover part 200 on the nozzle body 100, realizing the positional change of the cover part 200 along the length direction of the nozzle body 100. This satisfies the need to block different air outlet areas 140, meets the drying needs of different specifications of electrode sheets with different thinning areas, reduces the risk of cracking, improves the yield of electrode sheets, and improves the adaptability of the nozzle structure.

[0051] The movable blocks 320 are disposed at both ends of the cover portion 200, so that both ends of the cover portion 200 can move, which facilitates the cover portion 200 to move along the length direction of the nozzle body 100.

[0052] Of course, as some alternatives, the fixing structure may not include the slide rail 310 and the moving block 320, as long as the cover part 200 can be fixed at different positions along the length of the nozzle body 100. The movement path of the cover part 200 is not limited. For example, the cover part 200 can be detached from the nozzle body 100, moved to a suitable position, and then fixed.

[0053] Please see Figure 2 In one embodiment, the fixing mechanism 300 includes a tightening nut 330 and a tightening shaft 340. The tightening shaft 340 is threadedly connected to the tightening nut 330. The relative fixing of the cover part 200 and the nozzle body 100 is achieved through the cooperation of the tightening shaft 340 and the tightening nut 330.

[0054] Please see Figure 2 In one embodiment, a tightening nut 330 is disposed on the nozzle body 100. The tightening nut 330 includes a plurality of nuts, which are arranged along the length direction of the nozzle body 100 so that the cap portion 200 is fixed at different positions along the length direction of the nozzle body 100.

[0055] The tightening nut 330 can be located on the air outlet side 140 of the nozzle body 100, on the outside of the air outlet 120, so that after the cover part 200 is fixed to the nozzle body 100, the cover part 200 can cover the air outlet 120 and the air nozzle opening 130. Alternatively, the tightening nut 330 can be located on both sides of the nozzle body 100, on the sides adjacent to the air outlet side 140, so that after the cover part 200 is fixed to the nozzle body 100, it can cover the air outlet 120 and the air nozzle opening 130.

[0056] The tightening shaft 340 is disposed on the cover portion 200 and is movably connected to the cover portion 200 so that the tightening shaft 340 is screwed into the tightening nut 330, thereby fixing the cover portion 200 and the nozzle body 100.

[0057] Furthermore, the tightening shaft 340 is provided with a grip to facilitate the operator to hold and turn the tightening shaft 340. For example, the grip is provided at the end of the tightening shaft 340 away from the tightening nut 330, and the grip is ear-shaped to facilitate the operator to turn the tightening shaft 340.

[0058] In another embodiment, a tightening nut 330 is disposed on a slide rail 310, and multiple tightening nuts 330 are arranged along the length of the slide rail 310. A tightening shaft 340 is movably disposed on a movable block 320, and the tightening shaft 340 cooperates with the tightening nut 330 to fix the movable block 320 at different positions on the slide rail 310, thereby fixing the cover portion 200 to the nozzle body 100.

[0059] In other embodiments, the tightening nuts 330 can also be respectively set on the nozzle body 100 and the slide rail 310, so that the tightening nuts 330 are staggered, thereby facilitating the setting of more tightening nuts 330, reducing the spacing between the tightening nuts 330, and further facilitating the position adjustment of the cover part 200 and the nozzle body 100.

[0060] Correspondingly, the tightening shaft 340 is movably mounted on the cover portion 200 and the movable block 320 to cooperate with the tightening nut 330. In order to reduce the number of tightening shafts 340, through holes are provided on the cover portion 200 and the movable block 320. The tightening shaft 340 is inserted into the through holes to cooperate with the tightening nut 330, so that the relative fixation of the cover portion 200 and the nozzle body 100 can be completed by setting one tightening shaft 340 at each end of the cover portion 200.

[0061] Of course, as some alternatives, a tightening shaft 340 can also be provided on the slide rail 310 and / or the nozzle body 100. Multiple rotating shafts are arranged along the length of the nozzle body 100. The moving block 320 and / or the cover part 200 are provided with through holes. The tightening nut 330 cooperates with the tightening shaft 340 through the through hole so that the cover part 200 is fixed to the nozzle body 100.

[0062] Please see Figure 1 In one embodiment, the fixing mechanism 300 includes a limiting hole 350 and a limiting shaft 360. The limiting hole 350 is directly or indirectly disposed on the nozzle body 100, and the limiting shaft 360 is directly or indirectly movably disposed on the cover part 200. The relative fixation of the cover part 200 and the nozzle body 100 is achieved by inserting the limiting shaft 360 into the limiting hole 350.

[0063] In one embodiment, a limiting hole 350 is provided on the nozzle body 100, and a limiting shaft 360 is movably provided on the cover part 200. When the cover part 200 moves to a suitable position, the limiting shaft 360 is inserted into the limiting hole 350, so that the cover part 200 and the nozzle body 100 are relatively fixed.

[0064] The limiting hole 350 can be provided on the air outlet side 140 of the nozzle body 100, and the limiting hole 350 is provided on the outside of the air outlet 120, so that after the cover part 200 is fixed to the nozzle body 100, the cover part 200 can cover the air outlet 120 and the air nozzle opening 130. The limiting hole 350 can also be provided on both sides of the nozzle body 100, and the limiting hole 350 is provided on the side of the nozzle body 100 adjacent to the air outlet side 140, so that after the cover part 200 is fixed to the nozzle body 100, the air outlet 120 and the air nozzle opening 130 can be covered.

[0065] Furthermore, a reset member is provided between the limiting shaft 360 and the cover portion 200. When the limiting shaft 360 disengages from the limiting hole 350, the reset member applies a force to the limiting shaft 360 in the direction of the limiting hole 350 to facilitate the insertion of the limiting shaft 360 into the limiting hole 350 and ensure the stability of the fixing of the cover portion 200 and the nozzle body 100.

[0066] For example, the reset component is a spring, the limiting shaft 360 passes through the cover portion 200, the spring is sleeved outside the limiting shaft 360 and fixed to the cover portion 200. When the limiting shaft 360 moves in the direction of disengaging from the cover portion 200, the spring is stretched, and the elastic force of the spring acts on the limiting shaft 360, causing the limiting shaft 360 to tend to reset.

[0067] Please see Figure 1In another embodiment, the limiting hole 350 is provided on the slide rail 310, and the limiting shaft 360 is movably provided on the moving block 320. When the moving block 320 moves along the slide rail 310 to a suitable position, the limiting shaft 360 is inserted into the limiting hole 350, so that the moving block 320 and the slide rail 310 are relatively fixed, thereby making the cover part 200 and the nozzle body 100 relatively fixed.

[0068] In other embodiments, limiting holes 350 can be offset on the nozzle body 100 and the slide rail 310 to reduce the distance between adjacent limiting holes 350 in the length direction of the nozzle body 100, thereby allowing for more precise adjustment of the position of the cap 200 on the nozzle body 100 to meet the coating and drying needs of electrode sheets of different specifications.

[0069] Of course, as some alternatives, a limiting shaft 360 can be provided on the nozzle body 100 and / or the slide rail 310, and a limiting hole 350 can be provided on the cover part 200 and / or the moving block 320. The relative fixation of the cover part 200 and the nozzle body 100 can be achieved through the cooperation of the limiting hole 350 and the limiting shaft 360, thereby realizing the position adjustment of the cover part 200 on the nozzle body 100, meeting the drying needs of coating electrode sheets of different specifications, and improving the applicability of the nozzle structure.

[0070] In one embodiment, the preset area is matched with the coating thinning area 500, thereby more precisely adjusting the air volume at the coating thinning area 500, reducing the drying speed of the coating thinning area 500, and making the drying speed of the normal coating area the same or basically the same as that of the coating thinning area 500.

[0071] Furthermore, the capping part 200 is provided with various specifications. The appropriate capping part 200 is selected according to the width of the coating thinning zone 500 to obtain a preset area that is compatible with the coating thinning zone 500. The air volume of the coating thinning zone 500 is precisely adjusted so that the drying speed of the normal coating area and the coating thinning zone 500 is the same or basically the same, reducing the risk of cracking and improving the yield.

[0072] Please see Figure 2 In one embodiment, the nozzle structure includes a filter 400 disposed within the air guide cavity 110, parallel to the air outlet side 140. The filter 400 filters impurities and also evenly distributes hot steam within the area between the filter 400 and the air outlet side 140, thereby improving the uniformity of airflow from the nozzle openings 130 and ensuring the uniformity of drying in the coating area.

[0073] In one embodiment, the cover portion 200 includes a handle portion disposed at both ends of the cover portion 200. The handle portion facilitates movement of the cover portion 200, thereby enabling it to be moved to different positions on the nozzle body 100.

[0074] In one embodiment, the hand-held portion is a groove on the cover portion 200, so that the operator can insert his hand into the groove to hold it.

[0075] In another embodiment, the handle is a protrusion extending outward from the cover portion 200 to facilitate gripping by the operator.

[0076] Of course, as some alternatives, the handle can also be other structures, such as a door handle structure.

[0077] The second aspect of this utility model provides a coating machine, which includes an oven, and the oven includes the nozzle structure described above. The air outlet 120 and the nozzle opening 130 are blocked by the sealing part 200 of the nozzle structure, thereby adjusting the airflow of the coating thinning zone 500, and thus reducing the drying speed of the coating thinning zone 500. This makes the drying speed of the normal coating zone and the coating thinning zone 500 the same or substantially the same, thereby reducing the risk of cracking and improving the electrode yield.

[0078] In one embodiment of the coating machine, the oven is equipped with two air nozzle structures, which are located on the upper and lower sides of the electrode sheet to quickly dry the electrode sheet.

[0079] The two air nozzles are offset by 130°, which improves the uniformity of drying in different areas of the electrode, reduces the risk of cracking, and increases the yield of electrode products.

[0080] The nozzle structure and coating machine of this application reduce the airflow in the preset area by blocking the air outlet 120 and nozzle opening 130 of the preset area with the sealing part 200. This reduces the drying speed of the corresponding area, thereby making the drying speed of the coating thinning area 500 more consistent with that of the normal coating area, reducing the risk of cracking and improving the electrode yield. The fixing mechanism 300 can fix the sealing part 200 at different positions along the length of the nozzle body 100, thus meeting the drying needs of the coating thinning area 500 at different locations, expanding the application range of the sealing part 200, and meeting the drying needs of different electrode coatings. Therefore, this utility model effectively overcomes some practical problems in the prior art and has high utilization value and significance.

[0081] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A nozzle structure, characterized in that, include: The nozzle body is surrounded by an air guide cavity. The nozzle body is provided with an air inlet, an air outlet and a nozzle opening that communicate with the air guide cavity. The air outlet and the nozzle opening are located on the air outlet side of the nozzle body. A cover portion is movably disposed on the air outlet side of the nozzle body. The cover portion blocks the nozzle opening and the air outlet in a preset area. The cover portion spans the nozzle body along the width direction of the air outlet side. A fixing mechanism is configured to fix the cover at different positions along the length of the nozzle body.

2. The nozzle structure according to claim 1, characterized in that, The capping portion includes: Several air nozzle plugs are disposed on the side of the cover facing the air nozzle opening, and the air nozzle plugs are matched with the air nozzle opening to block the air nozzle opening.

3. The nozzle structure according to claim 2, characterized in that, The capping portion includes: An elastic zone is provided at least in the area where the cover portion blocks the nozzle opening, and the nozzle plug is provided in the elastic zone.

4. The nozzle structure according to claim 1, characterized in that, The fixing mechanism includes: Two slide rails are provided on both sides of the nozzle body, and the slide rails extend along the length direction of the nozzle body; A movable block, which matches the slide rail, is disposed at both ends of the cover portion.

5. The nozzle structure according to claim 4, characterized in that, The fixing mechanism includes: Tightening nuts are provided on the nozzle body and / or the slide rail, and a plurality of the tightening nuts are arranged along the length direction of the nozzle body; A tightening shaft is movably disposed on the cover portion and / or the movable block. The tightening shaft cooperates with the tightening nut to fix the cover portion to the nozzle body.

6. The nozzle structure according to claim 4, characterized in that, The fixing mechanism includes: Limiting holes are provided on the slide rail and / or the nozzle body, and a plurality of the limiting holes are arranged along the length direction of the nozzle body; A limiting shaft is provided on the moving block and / or the sealing part. The limiting shaft is movably connected to the moving block, and the limiting shaft cooperates with the limiting hole to fix the sealing part to the nozzle body.

7. The nozzle structure according to claim 1, characterized in that, The preset area is matched with the coating thinning area.

8. The nozzle structure according to claim 1, characterized in that, The nozzle structure includes: A filter screen is disposed inside the air guide cavity, and the filter screen is parallel to the air outlet side.

9. The nozzle structure according to claim 1, characterized in that, The capping portion includes: Hand-held portions are located at both ends of the cover portion.

10. A coating machine, characterized in that, The nozzle structure includes any one of claims 1 to 9.

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