Glue roller adjusting device for finishing and leather finishing equipment

Abstract

This application discloses a coating roller adjustment device and a leather coating equipment, including a rubber roller, a first adjustment mechanism, and a second adjustment mechanism. The first adjustment mechanism is connected to both ends of the rubber roller and is used to drive the rubber roller to move toward or away from the coating roller, thereby adjusting the distance between the rubber roller and the coating roller. The second adjustment mechanism is connected to the first adjustment mechanism and is used to indirectly drive the rubber roller to move toward or away from the coating roller, thereby adjusting the distance between the rubber roller and the coating roller. The reference movement amount of the second adjustment mechanism driving the rubber roller is less than the reference movement amount of the first adjustment mechanism driving the rubber roller. This application utilizes the first and second adjustment mechanisms to jointly adjust the distance between the rubber roller and the coating roller, and the different reference movement amounts of the first and second adjustment mechanisms driving the rubber roller facilitate rapid and high-precision adjustment of the rubber roller movement, thereby effectively improving the adjustment accuracy of the rubber roller.

Description

Technical Field

[0001] This application relates to the field of leather finishing technology, specifically to a finishing roller adjustment device and leather finishing equipment. Background Technology

[0002] Leather is animal hide that has undergone physical and chemical processing such as hair removal and tanning, resulting in a modified, less perishable material. It is composed of tightly woven natural protein fibers in three-dimensional space, with a unique grain layer on its surface, giving it a natural grain and luster, and a comfortable feel. During leather production, the leather is coated with pigments, chemical agents to enhance its shine, or compensating agents to fill in imperfections, in order to meet the different appearance requirements of various types of leather.

[0003] Traditional leather finishing equipment includes a finishing roller, a rubber roller, and a cylinder. The cylinder is connected to the rubber roller, and the finishing roller is positioned above the rubber roller. The cylinder then drives the rubber roller to move toward or away from the finishing roller, thereby adjusting the gap between the finishing roller and the rubber roller to accommodate leather of different thicknesses.

[0004] However, since the distance between the cylinder-adjusted rubber rollers is generally large, it is difficult to precisely control the accuracy between the rubber roller and the coating roller at the centimeter or millimeter level. There may be problems such as the gap between the rubber roller and the coating roller being too large, leading to failure in leather coating, or the gap between the rubber roller and the coating roller being too small, leading to excessive compression of the leather and difficulty in conveying. Utility Model Content

[0005] This application provides a coating roller adjustment device and a leather coating equipment to improve the problem of low accuracy in adjusting the position of the coating roller in traditional leather coating equipment.

[0006] In a first aspect, embodiments of this application provide a coating roller adjusting device, wherein the coating roller adjusting device is disposed opposite to a coating roller, and the coating roller adjusting device includes: Rubber rollers; The first adjustment mechanism is connected to both ends of the rubber roller and is used to drive the rubber roller to move toward or away from the coating roller in order to adjust the distance between the rubber roller and the coating roller. The second adjustment mechanism is connected to the first adjustment mechanism and is used to indirectly drive the rubber roller to move toward or away from the coating roller in order to adjust the distance between the rubber roller and the coating roller. Wherein, the reference movement amount of the second adjustment mechanism driving the rubber roller is less than the reference movement amount of the first adjustment mechanism driving the rubber roller.

[0007] Optionally, the first adjustment mechanism includes two first adjustment components, which are respectively connected to both ends of the rubber roller and are used to adjust the movement of both ends of the rubber roller toward or away from the coating roller.

[0008] Optionally, the first adjustment component includes a cylinder, a first swing arm, and a support shaft. The output end of the cylinder is connected to one end of the first swing arm. The end of the first swing arm away from the cylinder is rotatably sleeved on the support shaft. The first swing arm is connected to one end of the rubber roller. The support shaft is fixed and stationary.

[0009] Optionally, the second adjustment mechanism includes two second adjustment components, which are respectively connected to the ends of the two first adjustment components away from the coating roller, for adjusting the movement of the two first adjustment components toward or away from the coating roller, wherein the reference movement amount of the second adjustment component adjusting the movement of the first adjustment component is less than the reference movement amount of the first adjustment component adjusting the movement of the coating roller.

[0010] Optionally, the second adjusting assembly includes a first motor, a first gearbox, a lead screw, and an adjusting support. The output end of the first motor is connected to the first gearbox, the reduction output end of the first gearbox is connected to the lead screw, and the lead screw is threadedly connected to the adjusting support so that the adjusting support can move in the axial direction of the lead screw as the lead screw rotates. The adjusting support is connected to the first adjusting assembly.

[0011] Optionally, the second adjustment component further includes a fixed guide seat, the fixed guide seat having a guide groove, and the adjustment support slidingly engaging with the guide groove.

[0012] Optionally, the coating roller adjustment device further includes two housings, which are respectively located at both ends of the roller. Each housing contains a part of the first adjustment mechanism and a part of the second adjustment mechanism.

[0013] Optionally, the housing has a guide groove on the side facing the rubber roller, and the part of the first adjustment mechanism that directly drives the rubber roller to move has a guide post. The guide post is inserted into the guide groove to guide the movement trajectory of the rubber roller driven by the first adjustment mechanism.

[0014] Optionally, the coating roller adjustment device further includes a second motor, a second gearbox, and a second swing arm. The output end of the second motor is connected to the second gearbox, and the reduction output end of the second gearbox is connected to one end of the roller to drive the roller to rotate. One end of the second swing arm is fixedly connected to the gearbox, and the other end is rotatably connected to the part of the first adjustment mechanism used to directly drive the roller to move.

[0015] Secondly, embodiments of this application provide a leather finishing apparatus, including a finishing roller, a finishing drive mechanism, and a finishing rubber roller adjusting device as described in the first aspect. The finishing drive mechanism is drivenly connected to the finishing roller, and the rubber roller in the finishing rubber roller adjusting device is arranged opposite to the finishing roller and the distance between the rubber roller and the finishing roller can be adjusted.

[0016] Therefore, the embodiments of this application utilize a first adjustment mechanism and a second adjustment mechanism to jointly adjust the distance between the rubber roller and the coating roller. Furthermore, the reference movement amounts used by the first and second adjustment mechanisms to drive the rubber roller movement are different, meaning their adjustment accuracies differ. This combination facilitates rapid and high-precision adjustment of the rubber roller movement, thereby effectively improving the adjustment accuracy of the rubber roller. Specifically, the first adjustment mechanism is first used to quickly adjust the position of the rubber roller over a large range so that the distance between the rubber roller and the coating roller roughly meets the requirements. Then, the second adjustment mechanism is used to perform a small-range precision adjustment of the rubber roller, allowing it to move finely within a smaller range of reference movement amounts, thus improving the accuracy of the rubber roller position adjustment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a coating roller adjustment device provided in an embodiment of this application; Figure 2 This is a perspective view of the housing in a coating roller adjusting device provided in an embodiment of this application; Figure 3 A schematic diagram of the structure of a coating roller adjusting device provided in this application, showing the first adjusting component and the second adjusting component cooperating from a first perspective; Figure 4A schematic diagram of the structure of a coating roller adjusting device provided in this application, showing the first adjusting component and the second adjusting component cooperating from a second perspective; Figure 5 for Figure 3 An explosion diagram.

[0019] Explanation of reference numerals in the attached figures: 1. Rubber roller; 2. First adjusting mechanism; 21. First adjusting component; 211. Cylinder; 212. First swing arm; 213. Support shaft; 214. Guide column; 3. Second adjusting mechanism; 31. Second adjusting component; 311. First motor; 312. First gearbox; 313. Lead screw; 314. Adjusting support; 315. Fixed guide seat; 3151. Guide groove; 4. Housing; 41. Guide groove; 5. Second motor; 6. Second gearbox; 7. Second swing arm; 8. Hinge seat. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or specifying the number of technical features indicated. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0022] Please see Figures 1 to 5 This application provides a leather finishing apparatus, including a finishing roller, a finishing drive mechanism, and a finishing roller 1 adjustment device. The finishing drive mechanism is driven and connected to the finishing roller. The finishing roller 1 in the finishing roller 1 adjustment device is arranged opposite to the finishing roller and the distance between the roller 1 and the finishing roller can be adjusted so that the distance between the roller 1 and the finishing roller can meet the needs of leather of different thicknesses, ensuring that the leather can be smoothly transported while the leather finishing process is completed.

[0023] In some embodiments, the adjusting device for the coating roller 1 includes a roller 1, a first adjusting mechanism 2, and a second adjusting mechanism 3. The first adjusting mechanism 2 is connected to both ends of the roller 1 and is used to drive the roller 1 to move toward or away from the coating roller, thereby adjusting the distance between the roller 1 and the coating roller. The second adjusting mechanism 3 is connected to the first adjusting mechanism 2 and is used to indirectly drive the roller 1 to move toward or away from the coating roller, thereby adjusting the distance between the roller 1 and the coating roller.

[0024] In this embodiment, the reference movement amount of the second adjusting mechanism 3 driving the rubber roller 1 is less than the reference movement amount of the first adjusting mechanism 2 driving the rubber roller 1. Here, the reference movement amount refers to the minimum movement amount of the rubber roller 1 in each movement; in other words, the reference movement amount reflects the adjustment accuracy of the first adjusting mechanism 2 and the second adjusting mechanism 3. In this embodiment, the accuracy of the second adjusting mechanism 3 is higher than that of the first adjusting mechanism 2, enabling the second adjusting mechanism 3 to achieve more precise movement of the rubber roller 1 compared to the first adjusting mechanism 2. For example, the reference movement amount of the second adjusting mechanism 3 driving the rubber roller 1 can be at the millimeter level, while the reference movement amount of the first adjusting mechanism 2 driving the rubber roller 1 can be at the decimeter level. Of course, the accuracy levels of the first adjusting mechanism 2 and the second adjusting mechanism 3 can also be other levels, without limitation, as long as the accuracy of the second adjusting mechanism 3 is higher than that of the first adjusting mechanism 2, ensuring that the first adjusting mechanism 2 can achieve large-range rapid adjustment, and the second adjusting mechanism 3 can achieve small-range precision adjustment.

[0025] The technical solution provided in this application utilizes a first adjusting mechanism 2 and a second adjusting mechanism 3 to jointly adjust the distance between the rubber roller 1 and the coating roller. Furthermore, the reference movement amounts driven by the first adjusting mechanism 2 and the second adjusting mechanism 3 to move the rubber roller 1 are different, meaning the adjustment accuracies of the first adjusting mechanism 2 and the second adjusting mechanism 3 are different. Their cooperation facilitates rapid and high-precision adjustment of the rubber roller 1's movement, thereby effectively improving the adjustment accuracy of the rubber roller 1. Specifically, firstly, the first adjusting mechanism 2 is used to quickly adjust the position of the rubber roller 1 over a large range so that the distance between the rubber roller 1 and the coating roller roughly meets the requirements. Then, the second adjusting mechanism 3 is used to perform small-range precision adjustment of the rubber roller 1, enabling the rubber roller 1 to make fine movements based on a smaller range of reference movement amounts, thus improving the accuracy of the rubber roller 1's position adjustment.

[0026] In some embodiments, see Figure 1 and Figure 2The coating roller 1 adjustment device also includes two housings 4. The two housings 4 are respectively located at both ends of the roller 1. Each housing 4 contains a part of a first adjustment mechanism 2 and a part of a second adjustment mechanism 3, so that the first adjustment mechanism 2 and the second adjustment mechanism 3 can be housed in the housing 4 and protected by the housing 4, and the contamination of the first adjustment mechanism 2 and the second adjustment mechanism 3 is also reduced.

[0027] In some embodiments, see Figures 3 to 5 The first adjustment mechanism 2 includes two first adjustment components 21, which are respectively connected to both ends of the rubber roller 1. These components are used to adjust the movement of both ends of the rubber roller 1 towards or away from the coating roller. The two first adjustment components 21 are respectively located at both ends of the rubber roller 1, allowing for separate adjustment of both ends or simultaneous adjustment of both ends to adapt to different working conditions. One first adjustment component 21 is housed within one housing 4, and the other first adjustment component 21 is housed within another housing 4.

[0028] Furthermore, the first adjustment assembly 21 includes a cylinder 211, a first swing arm 212, and a support shaft 213. The output end of the cylinder 211 is connected to one end of the first swing arm 212. The end of the first swing arm 212 away from the cylinder 211 is rotatably sleeved on the support shaft 213. The first swing arm 212 is connected to one end of the rubber roller 1. The support shaft 213 is fixed and stationary, and can be fixed to the side of the housing 4 facing the rubber roller 1. The support shaft 213 cannot rotate and mainly serves as a support, acting as a fulcrum for the swing of the first swing arm 212. For example, when the cylinder 211 is activated, driving one end of the first swing arm 212 to move towards the coating roller, the first swing arm 212 simultaneously drives the rubber roller 1 to move towards the coating roller, thereby changing the distance between the coating roller and the rubber roller 1. When the first swing arm 212 moves under the action of the cylinder 211, the end of the first swing arm 212 away from the cylinder 211 rotates on the support shaft 213 to ensure the stability of the movement of the first swing arm 212 and that the movement trajectory meets the requirements of the movement trajectory of the rubber roller 1.

[0029] Furthermore, the first swing arm 212 is hinged to the output end of the cylinder 211 to improve the flexibility of the first swing arm 212 and prevent damage to the first swing arm 212 due to excessive stroke of the cylinder 211. Additionally, a guide groove 41 is provided on the side of the housing 4 facing the rubber roller 1, and a guide post 214 is provided on the part of the first adjusting mechanism 2 that directly drives the movement of the rubber roller 1. Specifically, a guide post 214 is provided on the side of the first swing arm 212 facing the rubber roller 1. The guide post 214 is inserted into the guide groove 41 to guide the trajectory of the first adjusting mechanism 2 driving the rubber roller 1, thereby preventing the movement trajectory of the rubber roller 1 from not meeting requirements due to the increased degree of freedom of the first swing arm 212 caused by the hinge between the first swing arm 212 and the cylinder 211.

[0030] In some embodiments, see Figures 3 to 5 The second adjustment mechanism 3 includes two second adjustment components 31, one of which is housed in one housing 4, and the other in another housing 4. The two second adjustment components 31 are respectively connected to the ends of the two first adjustment components 21 furthest from the coating roller 1, and are used to adjust the movement of the two first adjustment components 21 toward or away from the coating roller. The reference movement amount adjusted by the second adjustment component 31 of the first adjustment component 21 is less than the reference movement amount adjusted by the first adjustment component 21 of the coating roller 1. By using the second adjustment component 31 to adjust the position of the first adjustment component 21 toward the coating roller, the distance between the coating roller 1 and the coating roller is indirectly adjusted. Compared to the first adjustment component 21, the second adjustment component 31 is a fine-tuning component, meaning its adjustment range is smaller, making it suitable for fine position adjustments of the coating roller 1 and improving the accuracy of the coating roller 1's position adjustment.

[0031] Furthermore, the second adjustment assembly 31 includes a first motor 311, a first reduction gearbox 312, a lead screw 313, and an adjustment support 314. The output end of the first motor 311 is connected to the first reduction gearbox 312, and the reduction output end of the first reduction gearbox 312 is connected to the lead screw 313. The lead screw 313 is threadedly connected to the adjustment support 314, so that the adjustment support 314 can move in the axial direction of the lead screw 313 as the lead screw 313 rotates. The adjustment support 314 is connected to the first adjustment assembly 21. When the first motor 311 starts, it transmits the rotational motion of the output shaft of the first motor 311 to the first reduction gearbox 312. The reduction gearbox is an existing device that reduces the rotational motion of the output shaft of the first motor 311 to slow down the rotational speed of the lead screw 313, avoiding direct connection between the first motor 311 and the lead screw 313, which would cause excessive rotation. The lead screw 313 is threadedly connected to the adjusting support 314. When the lead screw 313 rotates, the adjusting support 314 moves along the axial direction of the lead screw 313 due to the action of the thread. Furthermore, by controlling the forward and reverse rotation of the first motor 311, the adjusting support 314 can move towards or away from the first adjusting component 21. The first motor 311 can be a servo motor or a stepper motor; both can achieve precise control of the movement of the adjusting support 314 by controlling the rotation speed, rotation angle, and number of rotations of the first motor 311.

[0032] Furthermore, the second adjustment assembly 31 also includes a fixed guide seat 315. The fixed guide seat 315 has a guide groove 3151, and the adjustment support 314 slides in conjunction with the guide groove 3151. The fixed guide seat 315 is fixed to the inner wall of the housing 4. In addition to guiding the adjustment support 314, it can also completely fix the positions of the first motor 311, the first reduction gearbox 312, and the lead screw 313, preventing the lead screw 313 from moving and affecting the movement of the adjustment support 314.

[0033] In some embodiments, a hinge seat 8 may be provided between the fixed guide seat 315 and the cylinder 211. The fixed guide seat 315 is fixedly connected to the hinge seat 8, and the cylinder 211 is hinged to the hinge seat 8, thereby giving the cylinder 211 the flexibility to move. At the same time, since the first swing arm 212 is limited and guided by the guide groove 41, it can ensure that the rubber roller 1 can move towards or away from the coating roller along a predetermined route, and can also provide a certain margin for the movement of the cylinder 211, reducing the risk of damage to various components due to movement.

[0034] In some embodiments, see Figure 1 and Figure 2The adjusting device for the coating roller 1 also includes a second motor 5, a second reduction gearbox 6, and a second swing arm 7. The output end of the second motor 5 is connected to the second reduction gearbox 6, and the reduction output end of the second reduction gearbox 6 is connected to one end of the roller 1 to drive the roller 1 to rotate. One end of the second swing arm 7 is fixedly connected to the reduction gearbox, and the other end is rotatably connected to the part of the first adjusting mechanism 2 used to directly drive the roller 1, that is, the end of the second swing arm 7 away from the reduction gearbox is connected to the first swing arm 212. By starting the second motor 5, the output shaft of the second motor 5 rotates, transmitting the rotational motion to the second reduction gearbox 6. The second reduction gearbox 6 reduces the original rotational motion and outputs it to the roller 1, enabling the roller 1 to rotate and realize the conveying and continuous coating of leather. When the first swing arm 212 moves under the drive of the cylinder 211 and / or the adjusting support 314, one end of the second swing arm 7 is fixed to the gearbox and rotatably connected to the gearbox, so that the second swing arm 7 can use the end fixed to the gearbox and rotatably connected to the gearbox as the pivot point, and the other end moves with the movement of the first swing arm 212. This ensures the normal movement of the first swing arm 212 without affecting the position changes of the second motor 5 and the second gearbox 6, thus ensuring the stability of the position and operation of the second motor 5 and the second gearbox 6.

[0035] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are suggested in this application, and therefore remain within the spirit and scope of the exemplary embodiments of this application.

[0036] Furthermore, this application uses specific terms to describe embodiments of the application. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0037] Similarly, it should be noted that, in order to simplify the description of the present application and thus aid in the understanding of one or more embodiments, the foregoing description of the embodiments of the present application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of the present application requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

[0038] For each patent, patent application, patent application publication, and other material such as articles, books, specifications, publications, and documents referenced in this application, the entire contents of that patent application are incorporated herein by reference, except for historical application documents that are inconsistent with or conflict with the content of this application, and documents that limit the broadest scope of the claims of this application (currently or subsequently appended to this application). It should be noted that if there are any inconsistencies or conflicts between the descriptions, definitions, and / or terminology used in the supplementary materials of this application and the content of this application, the descriptions, definitions, and / or terminology used in this application shall prevail.

[0039] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A coating roller adjusting device, characterized in that, The coating roller adjusting device is disposed opposite to the coating roller, and the coating roller adjusting device includes: Rubber rollers; The first adjustment mechanism is connected to both ends of the rubber roller and is used to drive the rubber roller to move toward or away from the coating roller in order to adjust the distance between the rubber roller and the coating roller. The second adjustment mechanism is connected to the first adjustment mechanism and is used to indirectly drive the rubber roller to move toward or away from the coating roller in order to adjust the distance between the rubber roller and the coating roller. Wherein, the reference movement amount of the second adjustment mechanism driving the rubber roller is less than the reference movement amount of the first adjustment mechanism driving the rubber roller.

2. The coating roller adjusting device according to claim 1, characterized in that, The first adjustment mechanism includes two first adjustment components, which are respectively connected to both ends of the rubber roller and are used to adjust the movement of both ends of the rubber roller toward or away from the coating roller.

3. The coating roller adjusting device according to claim 2, characterized in that, The first adjustment component includes a cylinder, a first swing arm, and a support shaft. The output end of the cylinder is connected to one end of the first swing arm. The end of the first swing arm away from the cylinder is rotatably sleeved on the support shaft. The first swing arm is connected to one end of the rubber roller. The support shaft is fixed and stationary.

4. The coating roller adjusting device according to claim 2, characterized in that, The second adjustment mechanism includes two second adjustment components, which are respectively connected to the ends of the two first adjustment components away from the coating roller. They are used to adjust the movement of the two first adjustment components toward or away from the coating roller. The reference movement amount of the second adjustment component in adjusting the movement of the first adjustment component is less than the reference movement amount of the first adjustment component in adjusting the movement of the coating roller.

5. The coating roller adjusting device according to claim 4, characterized in that, The second adjustment assembly includes a first motor, a first gearbox, a lead screw, and an adjustment support. The output end of the first motor is connected to the first gearbox, the reduction output end of the first gearbox is connected to the lead screw, and the lead screw is threadedly connected to the adjustment support so that the adjustment support can move in the axial direction of the lead screw as the lead screw rotates. The adjustment support is connected to the first adjustment assembly.

6. The coating roller adjusting device according to claim 5, characterized in that, The second adjustment component also includes a fixed guide seat, which has a guide groove, and the adjustment support slides in the guide groove.

7. The coating roller adjusting device according to claim 1, characterized in that, The coating roller adjustment device also includes two housings, which are respectively located at both ends of the roller. Each housing contains a part of the first adjustment mechanism and a part of the second adjustment mechanism.

8. The coating roller adjusting device according to claim 7, characterized in that, The housing has a guide groove on the side facing the rubber roller. The part of the first adjustment mechanism that directly drives the rubber roller is provided with a guide post. The guide post is inserted into the guide groove to guide the movement trajectory of the rubber roller driven by the first adjustment mechanism.

9. The coating roller adjusting device according to claim 1, characterized in that, The coating roller adjustment device further includes a second motor, a second gearbox, and a second swing arm. The output end of the second motor is connected to the second gearbox, and the reduction output end of the second gearbox is connected to one end of the roller to drive the roller to rotate. One end of the second swing arm is fixedly connected to the gearbox, and the other end is rotatably connected to the part of the first adjustment mechanism used to directly drive the roller to move.

10. A leather finishing device, characterized in that, The device includes a coating roller, a coating drive mechanism, and a coating roller adjustment device as described in any one of claims 1 to 9, wherein the coating drive mechanism is drivenly connected to the coating roller, and the rubber roller in the coating roller adjustment device is disposed opposite to the coating roller and the distance between the rubber roller and the coating roller can be adjusted.

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