Coating roller structure and coating equipment

Abstract

The present disclosure relates to a coating roller structure and a coating device, the coating roller structure comprising a first driving assembly, a connecting member and at least two coating roller monomers. At least two coating roller monomers are rotatably connected to one side of the connecting member, at least two coating roller monomers are arranged at intervals along the circumference of the connecting member, the first driving assembly is located on the other side of the connecting member and is transmission-connected to the connecting member to drive the connecting member to rotate, and then drive any one of the coating roller monomers to rotate to a position corresponding to the part to be coated carried on the coating device and to abut against the part to be coated, and the outer contour shape and / or outer diameter of each coating roller monomer is different, that is, the specifications of each coating roller monomer are different, so that coating roller monomers of different specifications can be selected according to the model or thickness of the part to be coated for abutment support, so as to facilitate subsequent coating operations. Not only is the entire structure simple, but also the applicability and flexibility are high.

Description

Technical Field

[0001] The present disclosure relates to the technical field of battery coating, and in particular to a coating roller structure and a coating device. Background Art

[0002] Lithium-ion batteries require a coating process during their manufacturing process. The coating process is the operation of evenly coating the coating slurry on the current collector of the lithium-ion battery. In order to improve the efficiency of the coating process, a coating device can be used to coat the current collector (usually a foil) of the lithium-ion battery.

[0003] Specifically, the coating equipment generally includes a slurry buffer device, a coating roller, a coating tank, and a coating knife. The slurry buffer device is used to store the coating slurry, and the coating roller is used to support the current collector so that the current collector is in a flat state for easy coating. During coating, the coating slurry in the slurry buffer device can flow into the coating tank, and then the coating roller rotates to evenly scrape the coating slurry in the coating tank onto the current collector on the coating roller, thereby realizing automatic coating operation.

[0004] However, the coating roller of the above-mentioned coating equipment has relatively fixed and single specifications and cannot be applied to current collectors of different models or thicknesses, which results in low applicability. Utility Model Content

[0005] In order to solve the above technical problems, the present disclosure provides a coating roller structure and a coating device.

[0006] In a first aspect, the present disclosure provides a coating roller structure, comprising a first driving assembly, a connecting member, and at least two coating roller monomers;

[0007] At least two coating roller monomers are rotatably connected to one side of the connecting member, and at least two coating roller monomers are arranged at intervals along the circumference of the connecting member;

[0008] The first driving assembly is located at the other side of the connecting member and is in driving connection with the connecting member, and is used to drive the connecting member to rotate and drive all coating roller monomers to rotate synchronously, so that any coating roller monomer can rotate to abut against the to-be-coated part on the coating device;

[0009] The outer contour shapes and / or outer diameters of the coating roller units are different.

[0010] In some embodiments, at least two of the coating roller units are arranged in parallel;

[0011] And / or, the output shaft of the first driving assembly is arranged concentrically with the rotation axis of the connecting member;

[0012] The outer diameter of each coating roller unit is not less than 120 mm.

[0013] In some embodiments, the connecting member includes a connecting body and at least two edge bodies connected to the connecting body;

[0014] At least two edge bodies are arranged at intervals along the circumference of the connecting body, the connecting body is transmission-connected to the first driving assembly, and at least two edge bodies are connected to the corresponding coating roller monomers in a one-to-one correspondence.

[0015] In some embodiments, the coating roller structure further includes a second drive assembly, which is disposed on the corresponding edge body and is transmission-connected to the corresponding coating roller unit for driving the corresponding coating roller unit to reciprocate along the direction from the edge body to the connecting body.

[0016] In some embodiments, a first sliding portion extending from the edge body to the connecting body is provided on the edge body, and a second sliding portion is provided on the corresponding coating roller unit at a position corresponding to the first sliding portion, and the first sliding portion and the second sliding portion are slidably matched.

[0017] In some embodiments, one of the first sliding portion and the second sliding portion is a slide groove extending from the edge body to the connecting body, and the other of the first sliding portion and the second sliding portion is a slide rail slidable along the slide groove.

[0018] In some embodiments, at least one of the two coating roller units is a cylindrical coating roller;

[0019] The horizontality error of the cylindrical coating roller along the axial direction of the cylindrical coating roller is not greater than 0.05 mm / m; and / or the cylindricity error of the cylindrical coating roller along the radial direction of the cylindrical coating roller is not greater than 0.05 mm.

[0020] In some embodiments, at least one of the two coating rollers is a threaded coating roller; a plurality of threads are arranged on the outer wall surface of the threaded coating roller, and the plurality of threads are arranged at intervals along the axial direction of the threaded coating roller;

[0021] The dimension of each of the threads along the axial direction of the threaded coating roller ranges from 0.2 mm to 1 mm;

[0022] And / or, the size range between two adjacent threads is 1mm-5mm;

[0023] And / or, the outer diameter of the threaded coating roller is consistent, or the outer diameter of the threaded coating roller gradually increases in the direction from both ends to the center of the threaded coating roller along the axial direction.

[0024] In some embodiments, at least one of the two coating roller units is a curved coating roller, and the outer wall surface of the curved coating roller is convexly arranged in a direction away from the central axis of the curved coating roller;

[0025] The arc height of the curved coating roller ranges from 1 mm to 10 mm.

[0026] In a second aspect, the present disclosure provides a coating device, including a device body and the coating roller structure as described above disposed on the device body.

[0027] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:

[0028] The present invention provides a coating roller structure and a coating device, wherein the coating roller structure comprises a first driving assembly, a connecting member, and at least two coating roller monomers. By rotating and connecting at least two coating roller monomers on one side of the connecting member, and at least two coating roller monomers being arranged at intervals along the circumference of the connecting member, the first driving assembly is located on the other side of the connecting member and is transmission-connected with the connecting member, and is used to drive the connecting member to rotate and drive the coating roller monomers to rotate synchronously, so that any one of the coating roller monomers can be rotated to abut against a piece to be coated on the coating device, and the outer contour shape and / or outer diameter of each coating roller monomer is different, that is, the specifications of each coating roller monomer are different, so that coating roller monomers of different specifications can be selected according to the specifications of the model or thickness of the piece to be coated to abut against and support the piece to be coated, so as to facilitate subsequent coating operations. That is to say, the coating roller structure of the present disclosure sets at least two coating roller units of different specifications on the connecting member, and the coating roller unit of the required specification can be rotated to the position corresponding to the part to be coated by driving the connecting member to rotate through the first driving component, so as to resist and support the part to be coated, and thus it can be applicable to the support and abutment operation of parts to be coated of different specifications, and not only the whole structure is simple, but also the applicability and flexibility are high. In addition, compared with the method of setting a plurality of coating rollers spaced along the length direction of the part to be coated in order to be applicable to parts to be coated of different specifications, the at least two coating roller units of the present disclosure are connected to the connecting member and spaced along the circumference of the first driving component, so the length dimension of the whole coating roller structure can be effectively saved, so as to realize miniaturization and be applicable to a smaller installation environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0031] Figure 1 The structure of the coating roller structure of the embodiment of the present disclosure is shown in FIG. Figure 1 ;

[0032] Figure 2 The structure of the coating roller structure of the embodiment of the present disclosure is shown in FIG. Figure 2 ;

[0033] Figure 3 A schematic structural diagram of a cylindrical coating roller of the coating roller structure according to an embodiment of the present disclosure;

[0034] Figure 4 A schematic structural diagram of a threaded coating roller of the coating roller structure according to an embodiment of the present disclosure;

[0035] Figure 5 It is a structural schematic diagram of a curved coating roller of the coating roller structure described in an embodiment of the present disclosure.

[0036] Reference numerals:

[0037] 1. Coating roller structure; 11. Connecting piece; 111. Edge body; 12. Coating roller unit; 121. Cylindrical coating roller; 122. Threaded coating roller; 123. Thread; 124. Curved coating roller; 2. Coating equipment; 21. Part to be coated; 22. Equipment body. DETAILED DESCRIPTION

[0038] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0039] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0040] Reference Figure 1 and Figure 2 As shown, this embodiment provides a coating roller structure 1, including a first driving assembly, a connecting member 11 and at least two coating roller units 12.

[0041] At least two coating roller monomers 12 are rotatably connected to one side of the connecting member 11 , and at least two coating roller monomers 12 are spaced apart along the circumferential direction of the connecting member 11 .

[0042] The first driving assembly is located at the other side of the connecting member 11 and is in transmission connection with the connecting member 11. The first driving assembly is located at the other side of the connecting member 11 and is in transmission connection with the connecting member 11, and is used to drive the connecting member 11 to rotate and drive all the coating roller monomers 12 to rotate synchronously, so that any coating roller monomer 12 can rotate to abut against the to-be-coated member 21 on the coating device 2. The outer contour shape and / or outer diameter of each coating roller monomer 12 are different.

[0043] In a specific implementation, the coating roller structure 1 may include a first driving component, a connecting member 11 and at least two coating roller monomers 12. The at least two coating roller monomers 12 may be, for example, Figure 1 The three coating roller monomers 12 shown may also be two coating roller monomers or more than three coating roller monomers 12, which can be set according to actual needs. For example, when the coating roller monomers 12 are configured to include three, the three coating roller monomers 12 can be evenly spaced along the circumference of the connecting member 11, that is, the angle between the axes of two adjacent coating roller monomers 12 can be 120°.

[0044] Specifically, at least two coating roller monomers 12 can be rotatably connected to the same side of the connecting member 11 and are arranged at intervals along the circumference of the connecting member 11. The first driving component is located on the other side of the connecting member 11 and cooperates with the connecting member 11 in transmission, so that when the first driving component drives the connecting member 11 to rotate, all the coating roller monomers 12 can be driven to rotate synchronously. Then, according to actual needs, a certain coating roller monomer 12 can be rotated to a position corresponding to the part to be coated 21 on the equipment main body 22, so that the part to be coated 21 can be supported by the coating roller monomer 12 to facilitate subsequent coating operations.

[0045] Since the outer contour shapes and / or outer diameters of all coating roller monomers 12 are different, it can be understood that the specifications of all coating roller monomers 12 are different. Therefore, coating roller monomers 12 of appropriate specifications can be selected according to the specifications of the parts to be coated 21 to support them, so that different specifications of the parts to be coated 21 can be adapted to improve applicability.

[0046] It should be noted that in order to enable the coating roller unit 12 to support the piece to be coated 21 without affecting the movement of the piece to be coated 21 along its length direction to realize the roller operation of the piece to be coated 21, the coating roller unit 12 can be rotatably connected to the connecting member 11, for example, it can be set to be rotatably connected through a rotating shaft or rotatably connected through a rotating hinge.

[0047] Exemplarily, the first driving assembly may include a first motor and a coupling, wherein the coupling is disposed on an output shaft of the first motor and connected to the connecting member 11, so that the connecting member 11 can be driven to rotate when the first motor drives the coupling to rotate.

[0048] The coating roller structure 1 of this embodiment has at least two coating roller monomers 12 of different specifications arranged on the connecting member 11. The coating roller monomer 12 of the required specification can be rotated to the position corresponding to the part to be coated 21 by driving the connecting member 11 to rotate through the first driving component, so as to resist and support the part to be coated 21. Therefore, it can be applicable to the support and abutment operation of the parts to be coated 21 of different specifications. Not only is the whole structure simple, but also the applicability and flexibility are high. In addition, compared with the method of setting a plurality of coating rollers spaced along the length direction of the part to be coated 21 in order to be applicable to the parts to be coated 21 of different specifications in the prior art, at least two coating roller monomers 12 of the coating roller structure 1 of this embodiment are connected to the connecting member 11 and spaced along the circumference of the first driving component. Therefore, the length dimension of the entire coating roller structure 1 can be effectively saved, so as to achieve miniaturization and be applicable to a smaller installation environment.

[0049] Reference Figure 1 As shown, in some embodiments, at least two coating roller units 12 are arranged in parallel, which not only makes the layout of the entire coating roller structure 1 more regular and saves space, but also facilitates better control of the rotation angle of the connecting member 11, so as to rotate a certain coating roller unit 12 to a position corresponding to the part to be coated 21 so as to support the part to be coated 21.

[0050] Alternatively, in other implementations, at least two coating roller units 12 may be arranged with a certain angle therebetween.

[0051] In some embodiments, the output shaft of the first driving assembly is concentrically arranged with the rotation axis of the connecting member 11, so that when the first driving assembly drives the connecting member 11 to rotate to drive all the coating roller monomers 12 to rotate, the distance between all the coating roller monomers 12 and the output shaft of the first driving assembly is consistent during rotation, so as to save space and better control the rotation angle of each coating roller monomer 12. Alternatively, in other implementations, the output shaft of the first driving assembly can also be arranged parallel to the rotation axis of the connecting member 11 and eccentrically arranged.

[0052] Exemplarily, the outer diameter of each coating roller unit 12 is not less than 120 mm, so as to be suitable for effectively supporting the object 21 to be coated.

[0053] Reference Figure 1 As shown, in some embodiments, the connecting member 11 includes a connecting body and at least two edge bodies 111 connected to the connecting body.

[0054] At least two edge bodies 111 are arranged at intervals along the circumference of the connecting body, the connecting body is transmission-connected to the first driving assembly, and at least two edge bodies 111 are connected to corresponding coating roller monomers 12 in a one-to-one correspondence.

[0055] In specific implementation, the number and position of the edge bodies 111 correspond to the number and position of the coating roller monomers 12, that is, one edge body 111 corresponds to one coating roller monomer 12, and all edge bodies 111 are connected to the connecting body, so that when the first driving component drives the connecting body to rotate, all edge bodies 111 are driven to rotate, and then the corresponding coating roller monomers 12 are driven to rotate through the rotation of the edge bodies 111, so that a certain coating roller monomer 12 to be used is rotated to the position corresponding to the part to be coated 21 so as to support the part to be coated 21.

[0056] For example, the connecting body and the edge body 111 can be integrally formed to save manufacturing steps and improve the structural strength of the entire connecting member 11. Alternatively, the connecting body and the edge body 111 can be formed separately and then welded or clamped together.

[0057] In some embodiments, the coating roller structure 1 further includes a second driving assembly, which is disposed on the corresponding edge body 111 and is transmission-connected to the corresponding coating roller monomer 12 for driving the corresponding coating roller monomer 12 to reciprocate along the direction from the edge body 111 to the connecting body.

[0058] That is to say, in addition to driving the connecting member 11 to rotate by the first driving component to drive all the coating roller units 12 to rotate synchronously to adjust the rotation angle or rotation position of the coating roller units 12, the coating roller units 12 can also be driven by the second driving component arranged on the corresponding edge body 111 to move along the direction from the edge body 111 to the connecting body, thereby achieving the position adjustment of the corresponding coating roller units 12.

[0059] For example, when there are three coating roller units 12, three second drive components can be provided, that is, each coating roller unit 12 can be driven by the corresponding second drive component to move to change its position. Alternatively, one or two second drive components can be provided to change the position of one or two coating roller units 12.

[0060] Exemplarily, the second driving component may be, for example, a driving motor or a driving cylinder.

[0061] In some embodiments, a first sliding portion extending from the edge body 111 to the connecting body is provided on the edge body 111, and a second sliding portion is provided on the corresponding coating roller unit 12 at a position corresponding to the first sliding portion, and the first sliding portion and the second sliding portion are slidably matched.

[0062] That is to say, in the process of the second driving component driving the corresponding coating roller monomer 12 to move along the direction from the edge body 111 to the connecting body, in order to avoid the coating roller monomer 12 from moving offset or skew, a first sliding part and a second sliding part can be provided, and since the first sliding part itself extends along the direction from the edge body 111 to the connecting body, in the process of the second driving component driving the corresponding coating roller monomer 12 to move along the direction from the edge body 111 to the connecting body, the first sliding part and the second sliding part can be used to slide and cooperate with each other to guide the coating roller monomer 12 when it moves along the direction from the edge body 111 to the connecting body, so as to avoid offset or skew during movement.

[0063] In some embodiments, one of the first sliding portion and the second sliding portion is a slide groove, which extends in the direction from the edge body 111 to the connecting body, and the other of the first sliding portion and the second sliding portion is a slide rail that can slide along the slide groove, thereby guiding the coating roller unit 12 to accurately reciprocate in the direction from the edge body 111 to the connecting body.

[0064] For example, in one implementation, a slide groove may be provided on the edge body 111 and a slide rail may be provided on the coating roller unit 12. Alternatively, in another implementation, a slide rail may be provided on the edge body 111 and a slide groove may be provided on the coating roller unit 12.

[0065] Reference Figure 3 As shown, in some embodiments, one of the at least two coating roller units 12 is a cylindrical coating roller 121 .

[0066] Specifically, the horizontality error of the cylindrical coating roller 121 along the axial direction of the cylindrical coating roller 121 is not greater than 0.05 mm / m, and the cylindricity error of the cylindrical coating roller 121 along the radial direction of the cylindrical coating roller 121 is not greater than 0.05 mm, so as to ensure that the horizontality of the cylindrical coating roller 121 along its axial direction and the cylindricity in the radial direction are within a preset range, so as to ensure reliable support for the coated part 21.

[0067] Reference Figure 4 As shown, in some embodiments, one of the at least two coating roller units 12 is a threaded coating roller 122. A plurality of threads 123 are disposed on the outer wall surface of the threaded coating roller 122, and the plurality of threads 123 are disposed at intervals along the axial direction of the threaded coating roller 122.

[0068] The size range of each thread 123 along the axial direction of the threaded coating roller 122 is 0.2mm-1mm. By reasonably setting the size range of each thread 123 along the axial direction of the threaded coating roller 122, the threaded coating roller 122 can effectively support the object 21 to be coated.

[0069] For example, the dimension of each thread 123 along the axial direction of the threaded coating roller 122 may be 0.2 mm, or 0.5 mm, or 1 mm.

[0070] Exemplarily, the size range between two adjacent threads 123 is 1 mm-5 mm, for example, 1 mm, 2 mm or 5 mm.

[0071] In some embodiments, the outer diameter of the threaded coating roller 122 is uniform, that is, the threaded coating roller 122 can be formed by setting threads 123 on a cylindrical roller. Alternatively, in other implementations, the outer diameter of the threaded coating roller 122 can be gradually increased in the direction from the axial ends to the center of the threaded coating roller 122, that is, the threaded coating roller 122 can be in a shape that is high in the middle and low on both sides.

[0072] Reference Figure 5 As shown, in some embodiments, one of at least two coating roller units 12 is a curved coating roller 124, and the outer wall surface of the curved coating roller 124 is protruded in a direction away from the central axis of the curved coating roller 124, so as to be suitable for scenarios where a large amount of push is required in the middle of the coated member 21 and a small amount of push is required on both sides of the coated member 21.

[0073] Exemplarily, the arc height of the curved coating roller 124 ranges from 1 mm to 10 mm, for example, 1 mm, 5 mm or 10 mm.

[0074] It should be noted that the arc height refers to the distance between the highest point and the lowest point of the outer wall surface of the curved coating roller 124 .

[0075] Reference Figures 1 to 5 As shown, this embodiment further provides a coating device 2, including a device body 22 and a coating roller structure 1 as described in the above embodiment and arranged on the device body 22.

[0076] The specific structure and implementation principle of the coating roller structure 1 in this embodiment are the same as those of the coating roller structure 1 provided in the above embodiment, and can bring the same or similar technical effects, which will not be described one by one here, and the details can be referred to the description of the above embodiment.

[0077] Specifically, the equipment body 22 is provided with a coating knife, a slurry buffer device, etc.

[0078] The coating knife is rotatably connected to the equipment body 22 , and is located at the bottom of the slurry buffer device to scrape the coating slurry discharged from the slurry buffer device onto the workpiece 21 to be coated.

[0079] In a specific implementation, the coating knife may be in the shape of a commonly used comma knife. In addition, a baffle may be provided on the device body 22, the baffle being located at the bottom of the slurry buffer device and forming a material trough on the baffle, so that the coating slurry flowing out of the slurry buffer device may fall into the material trough. The coating knife is located on one side of the material trough and may rotate to evenly scrape the coating slurry in the material trough onto the to-be-coated member 21 carried on the coating roller structure 1, thereby completing the entire coating operation.

[0080] Exemplarily, the coating member 21 may be a current collector of a lithium-ion battery, which is made of a foil material. Specifically, the positive electrode current collector of the lithium-ion battery may be made of aluminum foil, and the negative electrode current collector may be made of copper foil. The coating operation of aluminum foil and copper foil may refer to the above-mentioned coating operation.

[0081] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0082] The above description is only a specific embodiment of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A coating roller structure, characterized in that: It includes a first driving assembly, a connecting member and at least two coating roller units; At least two coating roller monomers are rotatably connected to one side of the connecting member, and at least two coating roller monomers are arranged at intervals along the circumference of the connecting member; The first driving assembly is located at the other side of the connecting member and is in driving connection with the connecting member, and is used to drive the connecting member to rotate and drive all the coating roller units to rotate synchronously, so that any of the coating roller units can rotate to abut against the to-be-coated part on the coating device; The coating rollers have different outer contour shapes and / or outer diameters.

2. The coating roller structure according to claim 1, characterized in that: All the coating rollers are arranged in parallel. And / or, the output shaft of the first driving assembly is arranged concentrically with the rotation axis of the connecting member; And / or, the outer diameter of each coating roller unit is not less than 120 mm.

3. The coating roller structure according to claim 1, characterized in that: The connecting member comprises a connecting body and at least two edge bodies connected to the connecting body; At least two edge bodies are arranged at intervals along the circumference of the connecting body, the connecting body is transmission-connected to the first driving assembly, and at least two edge bodies are connected to at least two coating roller monomers in a one-to-one correspondence.

4. The coating roller structure according to claim 3, characterized in that: The coating roller structure also includes at least two second drive components, and the at least two second drive components correspond one-to-one to the at least two edge bodies. The second drive components are arranged on the corresponding edge bodies and are transmission-connected to the corresponding coating roller monomers, and are used to drive the corresponding coating roller monomers to reciprocate along the direction from the edge body to the connecting body.

5. The coating roller structure according to claim 3, characterized in that: The edge body is provided with a first sliding part extending from the edge body to the connecting body, and the corresponding coating roller monomer is provided with a second sliding part at a position corresponding to the first sliding part, and the first sliding part and the second sliding part are slidably matched.

6. The coating roller structure according to claim 5, characterized in that: One of the first sliding part and the second sliding part is a slide groove extending from the edge body to the connecting body, and the other of the first sliding part and the second sliding part is a slide rail slidable along the slide groove.

7. The coating roller structure according to claim 1, characterized in that: At least one of the two coating roller units is a cylindrical coating roller; The horizontality error of the cylindrical coating roller along the axial direction of the cylindrical coating roller is not greater than 0.05 mm / m; and / or the cylindricity error of the cylindrical coating roller along the radial direction of the cylindrical coating roller is not greater than 0.05 mm.

8. The coating roller structure according to claim 1, characterized in that: At least one of the two coating rollers is a threaded coating roller; a plurality of threads are arranged on the outer wall surface of the threaded coating roller, and the plurality of threads are arranged at intervals along the axial direction of the threaded coating roller; The dimension of each of the threads along the axial direction of the threaded coating roller ranges from 0.2 mm to 1 mm; And / or, the size range between two adjacent threads is 1mm-5mm; And / or, the outer diameter of the threaded coating roller is consistent, or the outer diameter of the threaded coating roller gradually increases in the direction from the axial ends to the center of the threaded coating roller.

9. The coating roller structure according to claim 1, characterized in that: At least one of the two coating roller units is a curved coating roller, and the outer wall surface of the curved coating roller is convexly arranged in a direction away from the central axis of the curved coating roller; The arc height of the curved coating roller ranges from 1 mm to 10 mm.

10. A coating device, characterized in that: The invention comprises an equipment body and a coating roller structure as claimed in any one of claims 1 to 9 arranged on the equipment body.

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