Online coating deviation rectifying device for multilayer composite film

Abstract

The utility model relates to the technical field of deviation rectifying devices, in particular to an online coating deviation rectifying device for a multilayer composite film, which is characterized in that a hollow sleeve is fixedly connected in a sliding table, a T-shaped sliding ring is connected in the hollow sleeve in a sliding manner, and three cambered surface positioning blocks are arranged on the outer surface of the T-shaped sliding ring; a set of connecting rods are rotationally connected into the hollow sleeve and the T-shaped sliding ring correspondingly, a threaded rod is rotationally connected into the hollow sleeve, when the deviation rectifying roller installation base is installed, the surface of the threaded rod is held and screwed, and the threaded rod drives the T-shaped sliding ring in threaded connection with the threaded rod to slide downwards when rotating. The T-shaped sliding ring slides to extrude the three cambered surface positioning blocks to be opened, the cambered surface positioning blocks are connected with the hollow sleeve and the T-shaped sliding ring through the two sets of connecting rods, the movement track of the cambered surface positioning blocks is limited through the two sets of connecting rods, centering clamping positioning is achieved through the three cambered surface positioning blocks synchronously opened outwards, and therefore the convenience of positioning operation is improved.

Description

Technical Field

[0001] This utility model relates to the field of correction device technology, and in particular to a multilayer composite film online coating correction device. Background Technology

[0002] Multilayer composite film coating machines play a crucial role in numerous fields such as packaging, electronics, and medical. They are primarily used to uniformly coat the surface of multilayer composite films with various functional coating materials, thereby endowing the composite films with special functions such as barrier properties, conductivity, and optical properties, meeting the diverse needs of different industries. In the packaging field, coated composite films can better protect products and extend shelf life; in the electronics field, they can provide electronic components with insulation and conductivity properties; in the medical field, they help achieve antibacterial and breathable functions in composite films. Currently, multilayer composite film coating machines typically require the following technologies in practical applications:

[0003] 1. A high-precision coating head system ensures that the coating material can be uniformly and accurately coated on the composite film, guaranteeing the consistency and stability of the coating thickness;

[0004] 2. A stable composite membrane delivery system ensures smooth operation of the composite membrane during the coating process, avoiding problems such as shaking and deviation;

[0005] 3. A precise tension control system maintains appropriate tension on the composite film during coating, preventing deformation or poor coating quality due to uneven tension;

[0006] 4. A highly efficient drying system quickly dries the coated composite film, improving production efficiency while ensuring the curing effect of the coating.

[0007] Currently, various types of coating machines and coating methods are used to achieve stable delivery of multilayer composite films. Some coating machines employ adjustable correction rollers for online correction, using the displacement of the correction rollers to correct any misalignment of the composite film.

[0008] However, the above method has a prominent problem: when installing the straightening roller, the device usually lacks a centering and positioning mechanism. During the installation of the straightening roller, the mounting base needs to be aligned with the bolt holes of the base so that they are in the same position. Manually aligning the bolt holes requires repeatedly adjusting the position of the mounting base, relying on experience and multiple attempts to judge whether it is aligned. The process is tedious and time-consuming. Utility Model Content

[0009] To address the shortcomings of existing technologies, this utility model provides an online coating and correction device for multilayer composite films. It solves the technical problem that when installing the correction roller, the device usually lacks a centering and positioning mechanism. During the installation of the correction roller, it is necessary to align the mounting base with the bolt holes of the base to make them in the same position. Manually aligning the bolt holes requires repeated adjustments of the mounting base position, relying on experience and multiple attempts to determine whether it is aligned, which is a cumbersome and time-consuming process.

[0010] To achieve the above objectives, this utility model provides the following technical solution:

[0011] A multilayer composite film online coating and correction device includes a slide table, a hollow sleeve fixedly connected inside the slide table, a T-shaped sliding ring slidably connected inside the hollow sleeve, three arc-shaped positioning blocks on the outer surface of the T-shaped sliding ring, a set of connecting rods rotatably connected inside both the hollow sleeve and the T-shaped sliding ring, and two sets of connecting rods rotatably connected inside the two arc-shaped positioning blocks respectively, a threaded rod rotatably connected inside the hollow sleeve, and the T-shaped sliding ring threadedly connected to the outer surface of the threaded rod, and a correction roller mounting seat provided at the upper end of the slide table.

[0012] Preferably, the straightening roller body is rotatably connected inside the straightening roller mounting base, and a round rod support platform is slidably connected to the outer surface of the slide table.

[0013] Preferably, a cylinder is fixedly connected to the upper end of the round rod support platform, and the cylinder is disposed on the outer surface of the slide table.

[0014] Preferably, a coating machine is fixedly connected to the lower end of the round rod support platform, and a photoelectric sensor body is fixedly connected to the inner surface of the coating machine.

[0015] Preferably, a set of guide rollers is rotatably connected to the inner surface of the coating machine, and a gravure roller is rotatably connected to the inner surface of the coating machine.

[0016] Preferably, the coating machine has two air shafts rotatably connected inside, and a control box is fixedly connected to the outer surface of the coating machine.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. When installing the alignment roller mounting base, insert the mounting base into the outer ring of the three arc-shaped positioning blocks. Hold the threaded rod and screw it. As the threaded rod rotates, it will cause the T-shaped sliding ring connected to it to slide downward. The T-shaped sliding ring slides and squeezes the three arc-shaped positioning blocks to open. The arc-shaped positioning blocks are connected to the hollow sleeve and the T-shaped sliding ring through two sets of connecting rods, and their movement trajectory is restricted by the two sets of connecting rods. The three arc-shaped positioning blocks that open outward synchronously achieve centering and clamping positioning, thereby improving the convenience of positioning operation.

[0019] 2. When the photoelectric sensor detects a deviation, it sends an electrical signal to the control box, allowing the control box to monitor the lateral position of the composite film in real time. Once a deviation from the preset position is detected, a correction command is issued promptly, controlling the cylinder output shaft to extend and retract. Two round rod support platforms are installed inside the coating machine, with two sliding tables on their surfaces. The cylinder output shaft drives one sliding table to slide, causing the other sliding table to slide as well. The sliding trajectories of the two sliding tables form a figure-eight shape when compared to the coating machine. The two sliding tables drive the correction roller to shift, adjusting the conveying position of the multilayer composite film, thereby achieving online real-time correction control, ensuring the uniformity of the final winding position, and thus improving product quality. Attached Figure Description

[0020] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a connection structure diagram of the photoelectric sensor body of this utility model;

[0023] Figure 3 This is a structural diagram of the alignment roller body connection of this utility model;

[0024] Figure 4 This is an exploded view of the hollow sleeve connection of this utility model.

[0025] Legend: 11. Slide table; 12. Hollow sleeve; 13. T-shaped sliding ring; 14. Arc-shaped positioning block; 15. Connecting rod; 16. Threaded rod; 17. Correcting roller mounting base; 18. Correcting roller body; 19. Round rod support platform; 21. Cylinder; 22. Coating machine; 23. Photoelectric sensor body; 24. Guide roller; 25. Gravure roller; 26. Air shaft; 27. Control box. Detailed Implementation

[0026] This application provides an online coating correction device for multilayer composite films, effectively solving the problem that the device usually lacks a centering and positioning mechanism when installing the correction roller. During the installation operation, the mounting base needs to be aligned with the bolt holes of the base to ensure that they are in the same position. Manual alignment of the bolt holes requires repeated adjustments of the mounting base position, relying on experience and multiple attempts to determine whether it is aligned, which is tedious and time-consuming. When installing the correction roller mounting base, the mounting base is inserted into the outer ring of three arc-shaped positioning blocks. At this time, the threaded rod is held and screwed. When the threaded rod rotates, it drives the T-shaped sliding ring connected to it to slide downward. The T-shaped sliding ring slides and squeezes the three arc-shaped positioning blocks to open. The arc-shaped positioning blocks are connected to the hollow sleeve and the T-shaped sliding ring through two sets of connecting rods, and their movement trajectory is restricted by the two sets of connecting rods. The three arc-shaped positioning blocks that open outward simultaneously achieve centering and clamping positioning, thereby improving the convenience of the positioning operation. Example

[0027] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the technical solution in this application embodiment effectively solves the technical problem that when installing the correction roller, the device usually lacks a centering and positioning mechanism. During the installation operation, the mounting base needs to be aligned with the bolt holes of the base to ensure they are in the same position. Manual alignment of the bolt holes requires repeated adjustments of the mounting base position, relying on experience and multiple attempts to determine alignment, which is cumbersome and time-consuming. The overall idea is as follows: A multi-layer composite film online coating correction device includes a slide table 11, with a hollow sleeve 12 fixedly connected inside the slide table 11. A T-shaped sliding ring 13 is slidably connected inside the hollow sleeve 12. Three arc-shaped positioning blocks 14 are provided on the outer surface of the T-shaped sliding ring 13. A set of connecting rods 15 is rotatably connected inside both the hollow sleeve 12 and the T-shaped sliding ring 13. The two sets of connecting rods 15 are rotatably connected inside the two arc-shaped positioning blocks 14 respectively. A threaded rod 16 is rotatably connected inside the hollow sleeve 12. The sliding ring 13 is threadedly connected to the outer surface of the threaded rod 16. The upper end of the slide table 11 is provided with a correction roller mounting seat 17. The correction roller body 18 is rotatably connected inside the correction roller mounting seat 17. The correction roller body 18 is installed in the correction roller mounting seat 17 and is rotatably connected to it. When installing the correction roller mounting seat 17, the correction roller mounting seat 17 is inserted into the outer ring of the three arc-shaped positioning blocks 14. At this time, the surface of the threaded rod 16 is held and screwed. When the threaded rod 16 rotates, it will drive the T-shaped sliding ring 13 threadedly connected to it to slide downward. The T-shaped sliding ring 13 slides and squeezes the three arc-shaped positioning blocks 14 to open. The arc-shaped positioning blocks 14 are connected to the hollow sleeve 12 and the T-shaped sliding ring 13 through two sets of connecting rods 15, and their movement trajectory is restricted by the two sets of connecting rods 15. The three arc-shaped positioning blocks 14 that open outward synchronously achieve centering and clamping positioning, thereby improving the convenience of positioning operation.

[0028] A round rod support platform 19 is slidably connected to the outer surface of the slide table 11. A cylinder 21 is fixedly connected to the upper end of the round rod support platform 19, and the cylinder 21 is located on the outer surface of the slide table 11. A coating machine 22 is fixedly connected to the lower end of the round rod support platform 19. A photoelectric sensor body 23 is fixedly connected to the inner surface of the coating machine 22. A set of guide rollers 24 are rotatably connected to the inner surface of the coating machine 22. A gravure roller 25 is rotatably connected to the inner surface of the coating machine 22. Two air expansion shafts 26 are rotatably connected inside the coating machine 22. The two air expansion shafts 26 are used to install and unwind the film roll, respectively. The winding end is driven to rotate by the output shaft of the motor. The machine is installed in the coating machine 22. The air shaft 26 rotates to pull the multi-layer composite film in the unwound film roll to one end for winding. During the winding process, a set of guide rollers 24 plays a guiding role. During the winding process, the gravure roller 25 coats the surface of the multi-layer composite film. The surface of the gravure roller 25 is engraved with cells of a specific shape and depth. The cells are filled with paint. The paint is injected into the gravure roller 25 through a pipeline. When the gravure roller 25 rotates, it contacts the composite film and transfers the paint in the cells to the surface of the composite film. By controlling the shape, size and depth of the cells, the coating amount can be precisely controlled. A drying device can be set up before winding to ensure the dryness of the paint.

[0029] A control box 27 is fixedly connected to the outer surface of the coating machine 22. During the winding process, the multilayer composite film passes through the photoelectric sensor body 23. The photoelectric sensor body 23 is a reflective photoelectric sensor. Light is emitted through the photoelectric sensor body 23. When the light shines on the edge of the composite film, the intensity of the reflected or transmitted light changes. The reflection characteristics of the composite film surface are different from those of air. There is a sudden change in the intensity of reflected light at the edge. The sensor detects this change and thus determines the edge position of the composite film. When the photoelectric sensor body 23 detects a deviation, it will send an electrical signal to the control box 27, so that the control box 27 can monitor the composite film in real time. During the coating process, if the lateral position deviates from the preset position, a correction command is issued in time, controlling the output shaft of cylinder 21 to extend and retract. Two round rod support platforms 19 are installed inside the coating machine 22, and two slide tables 11 slide on the surface of the two round rod support platforms 19. The output shaft of cylinder 21 drives one slide table 11 to slide, and at the same time, the other slide table 11 is pushed and slides. The sliding trajectory of the two slide tables 11 is V-shaped when compared with the coating machine 22. The two sliding slide tables 11 drive the correction roller body 18 to move to adjust the conveying position of the multilayer composite film, thereby realizing online real-time correction control, ensuring the uniformity of the final winding position, and thus improving product quality.

[0030] To address the problems existing in the prior art, this utility model provides a multi-layer composite film online coating correction device. When installing the correction roller mounting base 17, the correction roller mounting base 17 is inserted into the outer ring of three arc-shaped positioning blocks 14. At this time, the threaded rod 16 is held and screwed. When the threaded rod 16 rotates, it will drive the T-shaped sliding ring 13 connected to it to slide downward. The T-shaped sliding ring 13 slides and squeezes the three arc-shaped positioning blocks 14 to open. The arc-shaped positioning blocks 14 are connected to the hollow sleeve 12 and the T-shaped sliding ring 13 through two sets of connecting rods 15, and their movement trajectory is restricted by the two sets of connecting rods 15. The three arc-shaped positioning blocks 14 that open outward synchronously achieve centering and clamping positioning, thereby improving the convenience of positioning operation.

[0031] Slide 11: As an important support and moving component of the device, it is internally fixedly connected to the hollow sleeve 12, providing installation space for the hollow sleeve 12 and its internal structure;

[0032] Hollow sleeve 12: provides installation and movement space for T-shaped sliding ring 13, connecting rod 15 and threaded rod 16, and controls the movement of arc-shaped positioning block 14 by cooperating with these components; together with T-shaped sliding ring 13, it connects to arc-shaped positioning block 14 through connecting rod 15, restricts the movement trajectory of arc-shaped positioning block 14, and assists in centering and clamping positioning of the correction roller mounting seat 17;

[0033] T-shaped sliding ring 13: threaded connection to the outer surface of threaded rod 16. When threaded rod 16 rotates, T-shaped sliding ring 13 slides up and down along threaded rod 16, thereby squeezing or releasing arc-shaped positioning block 14, realizing the clamping and releasing of the correction roller mounting seat 17. In conjunction with hollow sleeve 12, connecting rod 15 and arc-shaped positioning block 14, the centering and positioning operation of correction roller mounting seat 17 is completed.

[0034] Arc-shaped positioning block 14: It is rotatably connected to the hollow sleeve 12 and the T-shaped sliding ring 13 through two sets of connecting rods 15. Under the action of the T-shaped sliding ring 13, it can open outward or contract inward simultaneously. When the correction roller mounting seat 17 is sleeved into its outer ring, it opens outward simultaneously to achieve centering and clamping positioning of the correction roller mounting seat 17, ensuring the accuracy of the installation position of the correction roller mounting seat 17, and thus ensuring the installation accuracy of the correction roller body 18.

[0035] Link 15: It serves as a connection and transmission mechanism, transmitting the sliding motion of the T-shaped sliding ring 13 to the arc-shaped positioning block 14, while restricting the movement trajectory of the arc-shaped positioning block 14. Under the action of the T-shaped sliding ring 13, the arc-shaped positioning block 14 can synchronously open outward or retract inward according to a predetermined trajectory, assisting in achieving the centering and positioning of the correction roller mounting seat 17.

[0036] Threaded rod 16: By rotating, it drives the T-shaped sliding ring 13 to slide along its axial direction, thereby controlling the movement of the arc-shaped positioning block 14; the operator holds the surface of the threaded rod 16 and screws it to clamp or release the arc-shaped positioning block 14, which facilitates the installation and disassembly of the alignment roller mounting seat 17 and improves the convenience of positioning operation.

[0037] Correction roller mounting base 17: provides a support structure for the installation and rotation of the correction roller body 18, ensuring that the correction roller body 18 can accurately perform correction operation on the multilayer composite film under the drive of the slide table 11; cooperates with the arc surface positioning block 14, and is positioned by the centering clamp of the arc surface positioning block 14 during installation to ensure the accuracy of its own installation position, thereby ensuring the installation accuracy and correction effect of the correction roller body 18;

[0038] Correction roller body 18: Rotatably connected inside the correction roller mounting base 17, and driven by the slide table 11, it adjusts the conveying position of the multilayer composite film by changing its own position, thereby realizing online real-time correction control of the multilayer composite film.

[0039] Round rod support platform 19: The upper end is fixedly connected to the cylinder 21, and the lower end is fixedly connected to the coating machine 22. It plays a connecting and supporting role, transmits the power of the cylinder 21 to the slide table 11, and connects the slide table 11 and related components to the coating machine 22 as a whole, so that the entire correction device can be stably installed on the coating machine 22 and work normally.

[0040] Cylinder 21: Receives the correction command from the control box 27, and drives the slide table 11 to slide on the round rod support table 19 through the extension and retraction of the output shaft; cooperates with the slide table 11 and the round rod support table 19 to adjust the position of the correction roller body 18, thereby realizing the correction operation of the multilayer composite film, and is one of the power sources to realize the correction action.

[0041] Coating machine 22: The inner surface is rotatably connected to a set of guide rollers 24, gravure rollers 25 and two air shafts 26, which respectively realize the guiding, coating and unwinding functions of the multilayer composite film; the outer surface is fixedly connected to the control box 27, which provides an installation position for the control box 27 and serves as the support structure for the entire device, integrating various components to work together to complete the coating and correction operations of the multilayer composite film.

[0042] Photoelectric sensor body 23: When light shines on the edge of the composite film, the intensity of the reflected light changes abruptly. The sensor detects this change and determines the position of the edge of the composite film. Once a deviation of the composite film is detected, an electrical signal will be sent and output to the control box 27 to provide the control box 27 with the position information of the composite film, so that the control box 27 can issue a correction command to realize online real-time correction control of the multilayer composite film.

[0043] Guide roller 24: guides the multilayer composite film to move along a predetermined path, ensuring that the multilayer composite film maintains a stable running direction during the winding and coating process, avoiding problems such as offset and wrinkles during the movement of the composite film, and helping to ensure coating and winding quality;

[0044] Gravure roller 25: During the winding process of multilayer composite film, it comes into contact with the composite film and transfers the coating in the cells to the surface of the composite film. By controlling the shape, size and depth of the cells, the coating amount is precisely controlled to complete the coating process of the multilayer composite film and give the multilayer composite film a specific function or appearance.

[0045] Air shaft 26: The winding end is driven to rotate by the output shaft of the motor, which pulls the multilayer composite film in the unwound film roll to one end to wind it up, realizing the winding and unwinding function of the multilayer composite film. It is one of the power sources for the movement of the multilayer composite film in the coating machine 22. It works in conjunction with components such as guide roller 24 and gravure roller 25 to complete the coating and winding operations of the multilayer composite film.

[0046] Control box 27: Once the composite film is found to deviate from the preset position, it promptly issues a correction command and controls the output shaft of cylinder 21 to extend and retract, thereby realizing online real-time correction control of the multilayer composite film; as the control core of the entire correction system, it coordinates the work between various components to ensure the accurate position of the multilayer composite film during coating and winding processes, and guarantees product quality.

[0047] Working principle:

[0048] In the first step, two rotating air shafts 26 inside the coating machine 22 are used to mount and unwind the film rolls. The winding end is driven to rotate by the output shaft of a motor installed in the coating machine 22. The rotation of the air shafts 26 pulls the multilayer composite film in the unwinding roll towards one end for winding. During the winding process, a set of guide rollers 24 plays a guiding role. During the winding process, the gravure roller 25 coats the surface of the multilayer composite film. The surface of the gravure roller 25 is engraved with cells of a specific shape and depth. The cells are filled with paint. The paint is injected into the gravure roller 25 through a pipeline. When the gravure roller 25 rotates, it contacts the composite film and transfers the paint in the cells to the surface of the composite film. By controlling the shape, size and depth of the cells, the coating amount can be precisely controlled. A drying device can be set up before winding to ensure the dryness of the paint.

[0049] In the second step, during the winding process, the multilayer composite film passes through the photoelectric sensor body 23. The photoelectric sensor body 23 is a reflective photoelectric sensor. Light is emitted through the photoelectric sensor body 23. When the light shines on the edge of the composite film, the intensity of the reflected or transmitted light changes. The reflective characteristics of the composite film surface differ from those of air, resulting in a sudden change in reflected light intensity at the edge. The sensor detects this change, thus determining the edge position of the composite film. When the photoelectric sensor body 23 detects a deviation, it sends an electrical signal to the control box 27, allowing the control box 27 to monitor the lateral position of the composite film in real time. Once a deviation from the preset position is detected, a correction command is promptly issued, controlling the output shaft of the cylinder 21 to extend or retract. Two round rod support platforms 19 are installed inside the coating machine 22. Two sliding tables 11 slide on the surfaces of the two round rod support platforms 19. The output shaft of the cylinder 21 drives one sliding table 11 to slide, causing the other sliding table 11 to slide as well. 1. The sliding trajectory of the coating machine 22 is figure-eight shaped. The two sliding slides 11 drive the displacement of the correction roller body 18 to adjust the conveying position of the multilayer composite film, thereby realizing online real-time correction control, ensuring the uniformity of the final winding position, and thus improving product quality. The correction roller body 18 is installed in the correction roller mounting seat 17 and is rotatably connected to it. When installing the correction roller mounting seat 17, the correction roller mounting seat 17 is inserted into the outer ring of the three arc-shaped positioning blocks 14. At this time, the threaded rod 16 is held and screwed. When the threaded rod 16 rotates, it will drive the T-shaped sliding ring 13 connected to it to slide downward. The T-shaped sliding ring 13 slides and squeezes the three arc-shaped positioning blocks 14 to open. The arc-shaped positioning blocks 14 are connected to the hollow sleeve 12 and the T-shaped sliding ring 13 through two sets of connecting rods 15, and their movement trajectory is restricted by the two sets of connecting rods 15. The three arc-shaped positioning blocks 14 that open outward synchronously achieve centering and clamping positioning, thereby improving the convenience of positioning operation.

[0050] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A multilayer composite film online coating and correction device, comprising a slide table (11), wherein a hollow sleeve (12) is fixedly connected inside the slide table (11), characterized in that, The hollow sleeve (12) is slidably connected to a T-shaped sliding ring (13). The outer surface of the T-shaped sliding ring (13) is provided with three arc-shaped positioning blocks (14). Both the hollow sleeve (12) and the T-shaped sliding ring (13) are rotatably connected to a set of connecting rods (15). The two sets of connecting rods (15) are rotatably connected to the two arc-shaped positioning blocks (14) respectively. The hollow sleeve (12) is rotatably connected to a threaded rod (16). The T-shaped sliding ring (13) is threadedly connected to the outer surface of the threaded rod (16). The upper end of the slide (11) is provided with a correction roller mounting seat (17).

2. The online coating and correction device for multilayer composite films as described in claim 1, characterized in that, The correction roller mounting base (17) is rotatably connected to the correction roller body (18). The outer surface of the slide (11) is slidably connected to a round rod support platform (19).

3. The online coating and correction device for multilayer composite films as described in claim 2, characterized in that, A cylinder (21) is fixedly connected to the upper end of the round rod support platform (19). The cylinder (21) is disposed on the outer surface of the slide (11).

4. The online coating and correction device for multilayer composite films as described in claim 3, characterized in that, The lower end of the round rod support platform (19) is fixedly connected to a coating machine (22). The inner surface of the coating machine (22) is fixedly connected to a photoelectric sensor body (23).

5. The online coating and correction device for multilayer composite films as described in claim 4, characterized in that, A set of guide rollers (24) are rotatably connected to the inner surface of the coating machine (22). The inner surface of the coating machine (22) is rotatably connected to a gravure roller (25).

6. The online coating and correction device for multilayer composite films as described in claim 5, characterized in that, The coating machine (22) has two air shafts (26) rotatably connected inside. The coating machine (22) has a control box (27) fixedly connected to its outer surface.

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