Carrier roller and coating machine

Abstract

The utility model relates to the technical field of coating tools, in particular to a carrier roller and a coating machine. The carrier roller comprises a roller core and a roller body arranged on the roller core in a sleeving mode, step structures are distributed at the positions, corresponding to the tabs, of the roller body, and the radius of each step structure is smaller than that of the roller body. The step structures are arranged at the positions, corresponding to the tabs, of the roller body, so that the tabs are avoided, wrinkles of the tabs are reduced, and the problem that the tabs are prone to wrinkling in the climbing process of pole pieces in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of coating tools, in particular to a roller and a coating machine. Background Art

[0002] With the continuous advancement of coating technology, the application of extrusion coating machines in the lithium battery industry has gradually increased. In the production of multiple pole pieces by high-speed extrusion coating machines, the pole pieces generate transverse internal stress due to tension, wind pressure and thermal deformation during the drying process in the pole piece oven. This transverse internal stress causes the pole pieces to have a tendency to shrink and wrinkle laterally. After leaving the pole piece oven, the pole piece is constrained by flattening rollers, deviation correction rollers, large-diameter coating steel rollers, etc., and the transverse internal stress is suppressed, and the pole piece does not wrinkle significantly. After entering the climbing stage, the roller transmission and the jitter at the end of the climbing entering the second-layer oven cause the pole piece to lose sufficient constraints, and the transverse internal stress is concentrated and released, erupting in the pole ear area that is much thinner than the coating area, causing the pole ear to shrink and wrinkle, and is subjected to multiple roller pressures during the belt conveying stage, causing the recoverable wrinkles to gradually develop into irrecoverable dead wrinkles that produce plastic deformation. Utility Model Content

[0003] In order to solve the problem in the prior art that the pole ear of the pole piece is prone to wrinkling during the climbing process, the utility model provides a roller and a coating machine.

[0004] In a first aspect, an embodiment of the utility model provides a roller, comprising: a roller core and a roller body sleeved on the roller core;

[0005] The roller body is provided with a step structure at positions corresponding to the pole ears, and the radius of the step structure is smaller than the radius of the roller body.

[0006] In some embodiments, three step structures are provided, and the step structures are respectively located at the center of the roller body and at both ends of the roller body.

[0007] In some embodiments, the roller body and the step structure are integrally formed.

[0008] In some embodiments, the difference between the radius of the step structure and the radius of the roller body is R.

[0009] In some embodiments, the size of R is 0.65-0.85 mm.

[0010] In some embodiments, the roller body includes a first half roller and a second half roller;

[0011] The end surface of the roller body is provided with a fixing piece to fix the first half roller and the second half roller, and the roller body is provided with a locking assembly to lock the first half roller and / or the second half roller on the roller core.

[0012] In some embodiments, the fixing member is a clamping sleeve, and the end surfaces of the first half roller and the second half roller are provided with a first half groove and a second half groove that cooperate with each other to form an installation groove, and the clamping sleeve is arranged in the installation groove to achieve the fixation of the first half roller and the second half roller.

[0013] In some embodiments, the expansion sleeve is in the shape of annular, the first half groove and the second half groove are semi-annular grooves; the distance between the two groove walls of the first half groove gradually increases from the bottom of the groove to the groove mouth; the distance between the two groove walls of the second half groove gradually increases from the bottom of the groove to the groove mouth; the expansion sleeve is engaged in the first half groove and the second half groove to achieve the fixation of the first half roller and the second half roller.

[0014] In some embodiments, the locking assembly includes a rubber sleeve and a screw, the first half roller and the second half roller are threadedly connected to the roller core, and the screw passes through the first half roller or the second half roller, the rubber sleeve and the roller core in sequence to lock the first half roller or the second half roller to the roller core.

[0015] In a second aspect, an embodiment of the utility model further provides a coating machine, wherein the coating machine has a roller as described in any of the above embodiments.

[0016] One or more technical solutions provided in the embodiments of the present utility model have at least the following technical effects or advantages:

[0017] A roller provided in an embodiment of the utility model is provided with a step structure at a position corresponding to the pole lug on the roller body so as to avoid the pole lug and reduce the occurrence of the pole lug wrinkles. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 This is a structural schematic diagram of a roller proposed in one embodiment of the utility model;

[0020] Figure 2 This is an exploded view of a roller proposed in one embodiment of the utility model;

[0021] Figure 3 yes Figure 2 A magnified view of the structure of part A;

[0022] 100, roller; 1, roller core; 11, connecting piece; 2, roller body; 21, first half roller; 211, first half groove; 22, second half roller; 221, second half groove; 23, mounting groove; 3, step structure; 4, fixing piece; 5, locking assembly; 51, rubber sleeve; 52, screw. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the concept, specific structure and technical effects of the utility model in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the creation of the utility model can be combined interchangeably without conflicting with each other.

[0024] With the continuous advancement of coating technology, the application of extrusion coating machines in the lithium battery industry has gradually increased. In the production of multiple pole pieces by high-speed extrusion coating machines, the pole pieces generate transverse internal stress due to tension, wind pressure and thermal deformation during the drying process in the pole piece oven. This transverse internal stress causes the pole pieces to have a tendency to shrink and wrinkle laterally. After leaving the pole piece oven, the pole piece is constrained by flattening rollers, deviation correction rollers, large-diameter coating steel rollers, etc., and the transverse internal stress is suppressed, and the pole piece does not wrinkle significantly. After entering the climbing stage, the roller transmission and the jitter at the end of the climbing entering the second-layer oven cause the pole piece to lose sufficient constraints, and the transverse internal stress is concentrated and released, erupting in the pole ear area that is much thinner than the coating area, causing the pole ear to shrink and wrinkle, and is subjected to multiple roller pressures during the belt conveying stage, causing the recoverable wrinkles to gradually develop into irrecoverable dead wrinkles that produce plastic deformation.

[0025] In order to solve the problem in the prior art that the pole ear of the pole piece is prone to wrinkling during the climbing process, the utility model provides a roller and a coating machine.

[0026] See also Figure 1 to Figure 2 , Figure 1 This is a schematic diagram of the structure of a roller proposed in an embodiment of the utility model. Figure 2 It is an exploded view of a roller proposed in one embodiment of the utility model.

[0027] like Figure 1 and Figure 2 As shown, a roller provided in an embodiment of the utility model includes a roller core 1 and a roller body 2.

[0028] The roller core 1 is connected to the driving assembly, and the driving assembly drives the roller core 1 to rotate. In the embodiment of the utility model, the main body of the roller core 1 is a cylinder, and the two ends of the roller core 1 are respectively provided with connecting pieces 11 connected to the coating device, and the connecting piece 11 is a cylinder, and its radius is smaller than the radius of the main body of the roller core 1. The connecting piece 11 is integrally formed with the main body of the roller core 1, and the axis of the connecting piece 11 and the axis of the main body of the roller core 1 are located on the same horizontal line.

[0029] The roller body 2 is sleeved on the roller core 1. The roller body 2 is used to support and transmit the pole piece. When the roller core 1 rotates, the roller body 2 is driven to rotate together. The pole piece placed on the roller body 2 moves along the tangential direction of the roller body 2 under the force of the rotation of the roller body 2. In the embodiment of the utility model, the roller body 2 is a hollow cylinder, whose inner radius is greater than the radius of the main body of the roller core 1, and is sleeved and fixed on the main body of the roller core 1.

[0030] The roller body 2 is provided with a step structure 3 at a position corresponding to the pole ear, and the radius of the step structure 3 is smaller than the radius of the roller body 2. The step structure 3 is provided at a position corresponding to the pole ear on the roller body 2 to avoid the pole ear and reduce the occurrence of the pole ear wrinkling, so as to solve the problem that the pole ear is easy to wrinkle during the climbing process of the pole piece in the prior art.

[0031] Furthermore, the roller body 2 and the step structure 3 are integrally formed, and the surface of the roller body 2 is smoothly transitioned and recessed to form the step structure 3. Through the integral forming setting, it is ensured that the radius difference between the roller body 2 and the step structure 3 is within a suitable error range, so as to avoid the influence of the radius difference data between the roller body 2 and the step structure 3 due to production and assembly, etc., which may cause the pole piece to have wrinkles on the pole ear during the climbing process.

[0032] Furthermore, the radius difference between the step structure 3 and the roller body 2 is R. In the embodiment of the utility model, the size of R is 0.65-0.85 mm. According to multiple tests, R of 0.75 mm is the best radius difference between the step structure 3 and the roller body 2. Under this radius difference, the pole piece is not easy to wrinkle during the climbing process.

[0033] Specifically, in the embodiment of the utility model, three step structures 3 are provided on the roller body 2, which are respectively provided at the two ends of the roller body 2 and the center of the roller body 2. The step structures 3 provided at the two ends of the roller body 2 have the same length. It can be understood that the number, position and length of the step structures 3 are set according to the position and transmission condition of the pole lugs of the pole piece during the climbing process.

[0034] The specifications of the rollers correspond to the production specifications of the pole pieces. The rollers in the prior art are usually integrally formed, which makes replacement difficult.

[0035] In order to facilitate the adaptation to the production specifications of different pole pieces, the utility model embodiment proposes a roller, the roller body 2 includes a first half roller 21 and a second half roller 22, and the first half roller 21 and the second half roller 22 cooperate with each other to form the roller body 2. When the specifications of the roller need to be changed to adapt to the production specifications of different pole pieces, it is only necessary to dismantle the fixation between the first half roller 21 and the second half roller 22 and the connection between the first half roller 21 and the second half roller 22 and the roller core 1, and then the first half roller 21 and the second half roller 22 can be removed. The first half roller 21 and the second half roller 22 of the roller of another specification are installed and fixed on the roller core 1 to cooperate to form a roller of another specification, which solves the problem of inconvenient disassembly and replacement of rollers in the prior art.

[0036] In the embodiment of the utility model, the first half roller 21 has the same shape as the second half roller 22. Taking the first half roller 21 as an example, the first half roller 21 is recessed to form a groove for placing the roller core 1, and the groove is a semicircular groove, and its radius is greater than the radius of the roller core 1 body.

[0037] The end surface of the roller body 2 is provided with a fixing member 4 to fix the first half roller 21 and the second half roller 22 , and the roller body 2 is provided with a locking assembly 5 to lock the first half roller 21 and / or the second half roller 22 on the roller core 1 .

[0038] Furthermore, the fixing member 4 is a clamping sleeve, which is a device for mechanical connection, and can expand in the axial direction to apply radial pressure to the internal or external components to fix or connect the two components. The end surfaces of the first half roller 21 and the second half roller 22 are provided with a first half groove 211 and a second half groove 221 that cooperate with each other to form a mounting groove 23, and the clamping sleeve is arranged in the mounting groove 23 to achieve the fixing of the first half roller 21 and the second half roller 22.

[0039] In the embodiment of the utility model, both side end faces of the first half roller 21 are provided with first half grooves 211, and both side end faces of the second half roller 22 are provided with second half grooves 221. The first half grooves 211 and the second half grooves 221 on both side end faces cooperate with each other to form mounting grooves 23 on both side end faces of the roller body 2. The roller body 2 is fixed on both sides by placing expansion sleeves in the mounting grooves 23 on both side end faces of the roller body 2. The expansion sleeve is annular in shape, and the first half groove 211 and the second half groove 221 are semicircular grooves with the same structure. The mounting groove 23 formed by the cooperation between the first half groove 211 and the second half groove 221 is a circular groove, the size of which is consistent with the size of the expansion sleeve, and can just accommodate the expansion sleeve to fix the first half roller 21 and the second half roller 22.

[0040] Further, refer to Figure 3, the spacing between the two groove walls of the first half groove 211 gradually increases from the groove bottom to the groove opening; the spacing between the two groove walls of the second half groove 221 gradually increases from the groove bottom to the groove opening; that is, the two groove walls of the first half groove 211 and the second half groove 221 are arranged horizontally and tilted, and the cross-sections of the first half groove 211 and the second half groove 221 are both inverted trapezoids; when the expansion sleeve is embedded into the installation groove 23 from the groove opening, force is applied to the expansion sleeve to make the expansion sleeve expand in the installation groove 23, and the expanded expansion sleeve is interference fit with the first half groove 211 and the second half groove 221, thereby realizing the fixation of the first half roller 21 and the second half roller 22.

[0041] Furthermore, the locking assembly 5 includes a rubber sleeve 51 and a screw 52. The first half roller 21 and the second half roller 22 are threadedly connected to the roller core 1. The screw 52 passes through the first half roller 21 or the second half roller 22 and the rubber sleeve 51 in turn and is connected to the roller core 2 to lock the first half roller 21 or the second half roller 22 on the roller core 1.

[0042] Specifically, the locking assembly 5 is used to lock the first half roller 21 and / or the second half roller 22 on the roller core 1. In the embodiment of the utility model, two sets of locking assemblies 5 are provided, which are used to lock the first half roller 21 and the second half roller 22 on the roller core 1 respectively.

[0043] The principle of the locking assembly 5 applied to the first half roller 21 and the second half roller 22 is the same, and the first half roller 21 is taken as an example for detailed description below. The locking assembly 5 includes a rubber sleeve 51 and a screw 52. The first half roller 21 is provided with a mounting hole, and the corresponding position of the roller core 1 is provided with a threaded hole or a threaded groove. The screw 52 passes through the mounting hole on the first half roller 21, the rubber sleeve 51 and the threaded hole or the threaded groove on the roller core 1 in sequence to achieve the locking between the first half roller 21 and the roller core 1. Since the radius of the roller core 1 is smaller than the radius of the first half roller 21, there is a certain movable space between the roller core 1 and the first half roller 21. In order to avoid the first half roller 21 from deforming when the first half roller 21 is installed on the roller core 1, the rubber sleeve 51 is arranged to abut between the first half roller 21 and the roller core 1.

[0044] In addition, an embodiment of the utility model also provides a coating machine, which has the rollers described in any of the above embodiments.

[0045] In summary, the roller provided in the embodiment of the utility model has at least the following beneficial effects compared with the prior art:

[0046] Firstly, a roller provided in an embodiment of the utility model is provided with a step structure at a position corresponding to the pole lug on the roller body to avoid the pole lug and reduce the occurrence of the pole lug wrinkles.

[0047] Secondly, a roller proposed in an embodiment of the utility model is arranged to cooperate with each other to form a first half roller and a second half roller to form a roller body, so as to facilitate the disassembly and replacement of the specifications of the roller to adapt to coatings of different specifications, thereby solving the problem of inconvenient disassembly and replacement of rollers in the prior art.

[0048] The above is a specific description of the preferred implementation of the utility model, but the invention of the utility model is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A roller, characterized in that: include: A roller core and a roller body sleeved on the roller core; The roller body is provided with a step structure at positions corresponding to the pole lugs, and the radius of the step structure is smaller than the radius of the roller body; The roller body and the step structure are integrally formed.

2. The roller according to claim 1, characterized in that: The step structures are provided with three steps, and the step structures are respectively located at the center of the roller body and at two ends of the roller body.

3. The roller according to claim 1, characterized in that: The difference between the radius of the step structure and the radius of the roller body is R.

4. The roller according to claim 3, characterized in that: The size of R is 0.65-0.85 mm.

5. The roller according to any one of claims 1 to 4, characterized in that: The roller body comprises a first half roller and a second half roller; The end surface of the roller body is provided with a fixing piece to fix the first half roller and the second half roller, and the roller body is provided with a locking assembly to lock the first half roller and / or the second half roller on the roller core.

6. The roller according to claim 5, characterized in that: The fixing member is a clamping sleeve, and the end surfaces of the first half roller and the second half roller are provided with a first half groove and a second half groove that cooperate with each other to form a mounting groove, and the clamping sleeve is arranged in the mounting groove to achieve the fixation of the first half roller and the second half roller.

7. The roller according to claim 6, characterized in that: The shape of the expansion sleeve is annular, and the first half groove and the second half groove are semi-annular grooves; The distance between the two groove walls of the first half groove gradually increases from the groove bottom to the groove mouth; The distance between the two groove walls of the second half groove gradually increases from the groove bottom to the groove mouth; The expansion sleeve is engaged in the first half groove and the second half groove to fix the first half roller and the second half roller.

8. The roller according to claim 5, characterized in that: The locking assembly includes a rubber sleeve and a screw. The first half roller and the second half roller are threadedly connected to the roller core. The screw passes through the first half roller or the second half roller and the rubber sleeve in sequence and is connected to the roller core to lock the first half roller or the second half roller on the roller core.

9. A coating machine, characterized in that: The coating machine has the support roller according to any one of claims 1 to 8.

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