Film covering device

By designing a simple film covering device, the use of gas rising shafts and driving components to achieve the surface covering of the product, solve the problem of complex and high cost of the existing device, and achieve efficient and convenient film covering effects.

CN222407144UActive Publication Date: 2025-01-28SUZHOU JWELL MACHINERY
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Patent Information

Application Number
CN202323380382.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2023-12-12
Publication Date
2025-01-28
Estimated Expiration
2033-12-12

AI Technical Summary

Technical Problem

The existing plastic product coating device has complex structure and high cost, making it inconvenient for maintenance and adjustment.

Method used

Design a simple film covering device, including an upper membrane -covered mechanism and a lower membrane agency. Each institution consists of a pair of gas -rising axis set up in front and rear. And adjust the component to implement the film's rolls and regulation.

Benefits of technology

The simple, convenient and efficient surface of the product covered the protective film on the surface, reduced the manufacturing cost, and adapted to various product production lines.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

The utility model discloses a film covering device which comprises a film covering channel allowing products to pass through, an upper film covering mechanism arranged on the upper side of the film covering channel and a lower film covering mechanism arranged on the lower side of the film covering channel, and the upper film covering mechanism comprises a pair of first air swelling shafts arranged side by side front and back; one end of each first air swelling shaft is provided with an upper driving assembly, the upper driving assemblies are in transmission connection with the first air swelling shafts to drive the first air swelling shafts to rotate around the axes of the first air swelling shafts, the other end of each first air swelling shaft is provided with an upper adjusting assembly, and the upper adjusting assemblies are configured to drive the first air swelling shafts to move back and forth along the axes of the first air swelling shafts; the lower film covering mechanism comprises a pair of second air swelling shafts which are arranged side by side front and back; a lower driving assembly is arranged at one end of each second air swelling shaft, and the lower driving assemblies are in transmission connection with the second air swelling shafts so as to drive the second air swelling shafts to rotate around the axes of the second air swelling shafts. The protective film covering device is simple in structure, convenient to assemble, low in manufacturing cost and suitable for production lines of various products needing to be covered with protective films.
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Description

Technical Field

[0001] The present application relates to the technical field of sheet material production equipment, and in particular to a laminating device. Background Art

[0002] In the production of plastic products, in order to prevent the surface of the product from being scratched during transportation, a protective film is applied to the surface of the product. The current coating device has a complex structure, high cost, and is not easy to repair and adjust. Summary of the invention

[0003] In order to solve the above technical problems, the purpose of this application is to provide a simple coating device.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a coating device, comprising: a coating channel for products to pass through, an upper coating mechanism arranged on the upper side of the coating channel, and a lower coating mechanism arranged on the lower side of the coating channel, the upper coating mechanism comprising a pair of first air-expansion shafts arranged side by side in front and back, each of the first air-expansion shafts being wound with a first film covering the upper surface of the product, the upper coating mechanism being configured to unwind the first film from the pair of first air-expansion shafts to the coating channel; an upper drive assembly is arranged at one end of each of the first air-expansion shafts, and the upper drive assembly is transmission-connected to the first air-expansion shaft to drive the first The air-inflating shaft rotates around its own axis, and the other end of each of the first air-inflating shafts is provided with an upper adjustment component, and the upper adjustment component is configured to be able to drive the first air-inflating shaft to move back and forth along its own axis; the lower film-coating mechanism includes a pair of second air-inflating shafts arranged side by side front and back, and each of the second air-inflating shafts is wound with a second film covering the lower surface of the product, and the lower film-coating mechanism is configured to unwind the second film from the pair of second air-inflating shafts to the film-coating channel; one end of each of the second air-inflating shafts is provided with a lower driving component, and the lower driving component is transmission-connected to the second air-inflating shaft to drive the second air-inflating shaft to rotate around its own axis.

[0005] In the above technical solution, it is further preferred that each of the upper driving components includes a first magnetic powder brake and a first long gear transmission-connected to the first magnetic powder brake, and the axis of the first long gear is parallel to the axis of the first pneumatic shaft.

[0006] In the above technical solution, it is further preferred that a first pinion is coaxially sleeved on one end of each of the first pneumatic shafts, the first pinion is fixedly connected to the first pneumatic shaft and meshes with the first long gear, and the length of the first pinion is less than 1 / 2 of the length of the first long gear.

[0007] In the above technical scheme, it is further preferred that the upper adjustment component includes an adjustment plate clamped with the other end of the first gas expansion shaft, an adjustment nut arranged on the adjustment plate, an adjustment screw inserted in the adjustment nut, and an adjustment handwheel coaxially arranged with the adjustment screw, the adjustment screw is threadedly connected to the adjustment nut, the adjustment screw is parallel to the first gas expansion shaft, and the adjustment plate is configured to move back and forth along the adjustment screw with the adjustment nut when the adjustment screw rotates around its own axis.

[0008] In the above technical solution, it is further preferred that the other end of the first inflatable shaft is provided with a first limiting groove engaged with the adjusting plate, and at least a portion of the adjusting plate is engaged with the first limiting groove.

[0009] In the above technical solution, it is further preferred that the upper coating mechanism includes a first frame supporting the pair of first air-expansion shafts, and two pairs of rotatable first bearings are arranged on the first frame. One of the first air-expansion shafts is equipped with a pair of first bearings, and each pair of first bearings is arranged relatively front and back on the lower side of the corresponding first air-expansion shaft and are arranged tangent to the corresponding first air-expansion shaft.

[0010] In the above technical solution, it is further preferred that each of the lower driving components includes a second magnetic powder brake and a second long gear transmission-connected to the second magnetic powder brake, and the axis of the second long gear is parallel to the axis of the second air-expansion shaft.

[0011] In the above technical solution, it is further preferred that a second pinion is coaxially sleeved on one end of each of the second pneumatic shafts, the second pinion is fixedly connected to the second pneumatic shaft and meshes with the second long gear, and the length of the second pinion is less than 1 / 2 of the length of the second long gear.

[0012] In the above technical solution, it is further preferred that the lower coating mechanism also includes a second frame and a moving trolley, at least one of the second air-expanding shafts is rotatably disposed on the second frame, and one of the second air-expanding shafts is equipped with a pair of second bearings, and the pair of second bearings are rotatably disposed on the second frame front and back relative to each other; the moving trolley includes a base, a plurality of moving wheels disposed at the bottom of the base and a handle disposed on the base, and the second frame is fixedly disposed on the base.

[0013] In the above technical solution, it is further preferred that the two ends of each of the second pneumatic shafts are respectively provided with a locking assembly located at the top of the second frame, and the locking assembly is configured to rotatably restrict the second pneumatic shaft to the second frame from the radial direction of the corresponding second pneumatic shaft.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The present application has a simple structure, is easy to assemble, and has a low manufacturing cost, and can be adapted to production lines for a variety of products that need to be covered with a protective film. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a coating device provided in an embodiment of the present application;

[0017] Figure 2 for Figure 1 A front view of the upper laminating mechanism in FIG.

[0018] Figure 3 for Figure 2 A local enlarged schematic diagram of the middle A;

[0019] Figure 4 for Figure 2 A side view of an upper laminating mechanism;

[0020] Figure 5 for Figure 1 A front view of the lower laminating mechanism in FIG.

[0021] Figure 6 for Figure 5 A top view of the lower laminating mechanism in FIG.

[0022] Figure 7 for Figure 6 A partial enlarged schematic diagram of point B in the middle;

[0023] Figure 8 for Figure 5 Side view of the lower laminating mechanism in FIG.

[0024] Among them: 100, laminating device; 10, laminating channel; 20, upper laminating mechanism; 1, first air expansion shaft; 101, first limit slot; 2, upper drive assembly; 21, first magnetic powder brake; 22, first long gear; 3, upper adjustment assembly; 31, adjustment plate; 32, adjustment nut; 33, adjustment screw; 34, adjustment hand wheel; 35, support plate; 36, guide column; 4, first frame; 41, first bearing; 5, first small Gear; 30, lower laminating mechanism; 6, second pneumatic shaft; 7, lower driving assembly; 71, second magnetic powder brake; 72, second long gear; 8, second pinion; 9, second frame; 91, second bearing; 11, moving trolley; 111, base; 112, moving wheel; 113, handle; 12, guide rail; 13, locking assembly; 131, locking block; 132, locking screw; 133, locking handwheel; 134, roller. DETAILED DESCRIPTION

[0025] To describe the technical content, structural features, achieved purpose and effect of the application in detail, the technical solutions in the embodiments of the application will be described below in conjunction with the drawings in the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all of the embodiments. In the following description, for the purpose of explanation, many specific details are set forth to provide a detailed description of various exemplary embodiments or implementations of the invention. However, various exemplary embodiments may also be implemented without these specific details or in the case of one or more equivalent arrangements. In addition, various exemplary embodiments may be different, but not necessarily exclusive. For example, without departing from the inventive concept, the specific shape, structure and characteristics of the exemplary embodiment may be used or implemented in another exemplary embodiment.

[0026] In the following, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0027] The terms “front”, “back”, “upper” and “lower” in this application refer to the attached Figure 1 The front, rear, top and bottom shown in the figure; the "left" and "right" in this application refer to the attached Figure 2 Left and right shown.

[0028] In the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0029] The present application provides a coating device, which is arranged in a product production line and is used to coat the products with protective films from top to bottom. Figure 1 As shown, the laminating device 100 includes a laminating channel 10 for products to pass through, an upper laminating mechanism 20 arranged on the upper side of the laminating channel 10, and a lower laminating mechanism 30 arranged on the lower side of the laminating channel 10. The upper laminating mechanism 20 and the lower laminating mechanism 30 are arranged independently of each other. The upper laminating mechanism 20 is used for unwinding a first film covering the upper surface of the product into the laminating channel 10, and the lower laminating mechanism 30 is used for unwinding a second film covering the lower surface of the product into the laminating channel 10, thereby achieving lamination of the upper and lower surfaces of the product.

[0030] like Figure 2-4 As shown, the upper film coating mechanism 20 includes a pair of first air inflation shafts 1 arranged side by side in front and back, the pair of first air inflation shafts 1 are parallel to each other, each first air inflation shaft 1 has an axis X1 extending in the left-right direction, and an upper driving component 2 is provided at one end of each first air inflation shaft 1, and the upper driving component 2 is transmission-connected with the first air inflation shaft 1 to drive the corresponding first air inflation shaft 1 to rotate around its own axis X1, and an upper adjusting component 3 is provided at the other end of each first air inflation shaft 1, and the upper adjusting component 3 is configured to drive the first air inflation shaft 1 to move back and forth along its own axis X1; the upper film coating mechanism 20 is supported on the upper side of the film coating channel 10 by a first frame 4, and a pair of first air inflation shafts 1 are rotatably mounted on the first frame 4. When the coating device 100 is performing coating operation, one of the pair of first air inflation shafts 1 is selected to unwind, and when one of the first air inflation shafts 1 rotates around its own axis X1 to unwind the first film, the other first air inflation shaft 1 does not rotate. When the unwinding first air inflation shaft 1 is empty, the other first air inflation shaft 1 immediately rotates to continue releasing the first film to the product, and the empty first air inflation shaft 1 stops rotating and is replaced with the full first air inflation shaft 1 to wait for unwinding. The pair of first air inflation shafts 1 are continuously unwound, and the product does not need to stop to wait for the first air inflation shaft 1 to be replaced, thereby ensuring the continuity of product transportation and improving production efficiency.

[0031] Each upper driving assembly 2 includes a first magnetic powder brake 21 and a first long gear 22. The first long gear 22 is coaxially sleeved on the transmission shaft of the first magnetic powder brake 21 and rotates around the axis X2 driven by the first magnetic powder brake 21. The axis X2 of the first long gear 22 is parallel to the axis X1 of the first air shaft 1. A first pinion 5 is coaxially sleeved at one end of each first air shaft 1. The first pinion 5 is coaxially fixedly connected to the first air shaft 1 and meshes with the first long gear 22. When the first long gear 22 rotates, the first pinion 5 drives the first air shaft 1 to rotate around the axis X1. The length of the first pinion 5 is less than 1 / 2 of the length of the first long gear 22, so that the first pinion 5 can adjust its position on the first long gear 22 in the left and right directions.

[0032] Each upper adjustment component 3 includes an adjustment plate 31 that is clamped with the other end of the corresponding first gas expansion shaft 1, an adjustment nut 32 arranged on the adjustment plate 31, an adjustment screw 33 inserted in the adjustment nut 32, and an adjustment handwheel 34 coaxially arranged with the adjustment screw 33. The adjustment screw 33 is threadedly connected with the adjustment nut 32, and the adjustment screw 33 is parallel to the first gas expansion shaft 1. The adjustment handwheel 34 is operated by the user to drive the adjustment screw 33 to rotate. When the adjustment screw 33 rotates around its own axis, the adjustment plate 31 moves back and forth along the adjustment screw 33 with the adjustment nut 32. The upper adjustment assembly 3 also includes a support plate 35, which is connected to the outer side of the first frame 4 through a plurality of guide columns 36, and each guide column 36 is parallel to the adjusting screw rod 33, so that the support plate 35 is maintained at a position perpendicular to the adjusting screw rod 33; the adjusting screw rod 33 is rotatably passed through the support plate 35 and the adjusting plate 31, and is maintained on the outer side of the first frame 4 by the support plate 35; at least one guide column 36 is passed through the adjusting plate 31 to guide the movement of the adjusting plate 31.

[0033] The other end of the first gas expansion shaft 1 is provided with a first limiting groove 101 which is engaged with the adjustment plate 31. The top of the adjustment plate 31 is provided with a receiving groove (not shown in the figure) for receiving at least part of the first gas expansion shaft 1. At least part of the adjustment plate 31 around the receiving groove is inserted into the first limiting groove 101, so that an external force can be applied to the first gas expansion shaft 1 in the axial direction of the first gas expansion shaft 1. When the adjustment plate 31 moves in the left and right directions under the drive of the adjustment screw 33, the adjustment plate 31 can drive the first gas expansion shaft 1 to move in the left and right directions, so as to adjust the unwinding of the first gas expansion shaft 1 in the left and right directions to correct the unwinding direction of the first film. The receiving groove has an opening at the top of the first frame 4 for the first gas expansion shaft 1 to move in and out, so as to facilitate the rewinding of the first gas expansion shaft 1. When the upper adjustment component 3 adjusts the first gas expansion shaft 1 in the left and right directions, the first pinion 5 adjusts its position on the first long gear 22 relative to the first long gear 22. The longer first long gear 22 prevents the first pinion 5 from being separated from the first long gear 22 when adjusting its position.

[0034] Two pairs of rotatable first bearings 41 are arranged on the first frame 4. One first pneumatic shaft 1 is equipped with a pair of first bearings 41. Each pair of first bearings 41 are arranged front to back oppositely and are arranged tangentially to the corresponding first pneumatic shaft 1. The first bearings 41 are used to support the corresponding first pneumatic shaft 1 on the first frame 4, and rotate with the first pneumatic shaft 1 when the first pneumatic shaft 1 rotates, thereby reducing the friction between the first pneumatic shaft 1 and the first frame 4, so that the first pneumatic shaft 1 can rotate freely on the first frame 4.

[0035] like Figure 5-8As shown, the lower film coating mechanism 30 includes a pair of second air inflation shafts 6 arranged side by side in front and back, the pair of second air inflation shafts 6 are parallel to each other, and each second air inflation shaft 6 has an axis X3 extending in the left and right direction; a lower driving assembly 7 is provided at one end of each second air inflation shaft 6, and the lower driving assembly 7 is transmission-connected with the second air inflation shaft 6 to drive the second air inflation shaft 6 to rotate around its own axis X3. Each second air inflation shaft 6 is wound with a second film covering the lower surface of the product, and the pair of second air inflation shafts 6 are rotatably mounted on the second frame 9. The pair of second air inflation shafts 6 are unwound one by one like the pair of first air inflation shafts 1.

[0036] Each lower driving assembly 7 includes a second magnetic powder brake 71 and a second long gear 72 connected to the second magnetic powder brake 71. The axis X4 of the second long gear 72 is parallel to the axis X3 of the second air expansion shaft 6. A second pinion 8 is coaxially sleeved at one end of each second air expansion shaft 6. The second pinion 8 is fixedly connected to the second air expansion shaft 6 and meshes with the second long gear 72. When the second long gear 72 rotates, the second pinion 8 drives the second air expansion shaft 6 to rotate around the axis X3. The length of the second pinion 8 is less than 1 / 2 of the length of the second long gear 72. The first magnetic powder brake 21 and the second magnetic powder brake 71 respectively control the unwinding tension of the first air expansion shaft 1 and the second air expansion shaft 6 to prevent the first film and the second film from being stretched or wrinkled, so that the surface coating of the product is smooth, and the quality and aesthetics of the product are improved.

[0037] The lower coating mechanism 30 also includes a second frame 9 and a movable trolley 11. In the embodiment of the present application, a second pneumatic shaft 6 is configured with a second frame 9 and a movable trolley 11. The second pneumatic shaft 6 is rotatably mounted on the corresponding second frame 9. A pair of rotatable second bearings 91 are provided on the second frame 9. The pair of second bearings 91 are arranged opposite to each other front and back and are both tangentially arranged to the corresponding second pneumatic shaft 6. The second bearings 91 are used to support the corresponding second pneumatic shaft 6 on the second frame 9, so that the second pneumatic shaft 6 can rotate freely on the second frame 9.

[0038] The mobile trolley 11 includes a base 111, a plurality of moving wheels 112 arranged at the bottom of the base 111, and a handle 113 arranged on the base 111. The second frame 9 is fixedly arranged on the base 111. The base 111 can drive the supported second air expansion shaft 6 to move below the film coating channel 10 through the plurality of moving wheels 112. In the embodiment of the present application, a guide rail 12 for guiding the mobile trolley 11 is arranged below the mobile trolley 11. The guide rail 12 extends in the left-right direction. The plurality of moving wheels 112 of the mobile trolley 11 cooperate with the guide rail 12 to move back and forth in the left-right direction. By adjusting the position of the mobile trolley 11 in the left-right direction, the unwinding direction of the second air expansion shaft 6 is corrected to prevent the second film unwinding by the second air expansion shaft 6 from deviating from the coating position.

[0039] like Figure 7 , 8 As shown, the two ends of each second air expansion shaft 6 are respectively provided with a locking assembly 13 located at the top of the second frame 9, the locking assembly 13 includes a locking block 131, a locking screw 132 and a locking handwheel 133, one end of the locking block 131 is hinged on the second frame 9, one end of the locking screw 132 is also hinged to the second frame 9, and the other end of the locking screw 132 can pass through the other end of the locking block 131 and cooperate with the locking handwheel 133 To lock the locking block 131 on the second frame 9, the locking handwheel 133 is threadedly connected to the locking screw 132. When the locking handwheel 133 rotates, the locking handwheel 133 can move back and forth along the locking screw 132; the locking block 131 is provided with a roller 134 parallel to the second air expansion shaft 6. When the locking block 131 locks the second air expansion shaft 6, the roller 134 is tangent to the second air expansion shaft 6 to reduce the friction between the second air expansion shaft 6 and the locking block 131. When the locking handwheel 133 is screwed in to lock the locking block 131 on the second frame 9, the end of the second air expansion shaft 6 is restricted between the locking block 131 and the second frame 9, and the second air expansion shaft 6 cannot radially jump, thereby improving the unwinding stability of the lower laminating mechanism 30; when the locking handwheel 133 of a pair of locking assemblies 13 is screwed out upward, so that the other end of the locking block 131 is disengaged from the locking screw 132, the second air expansion shaft 6 can be removed from the second frame 9 to achieve reel change.

[0040] The present application has a simple structure, is easy to assemble, and has a low manufacturing cost, and can be adapted to production lines for a variety of products that need to be covered with a protective film.

[0041] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present application. Without departing from the spirit and scope of the present application, the present application may have various changes and improvements, and the scope of protection required by the present application is defined by the attached claims, description and their equivalents.

Claims

1. A coating device, characterized in that: include: A coating channel for products to pass through, an upper coating mechanism arranged on the upper side of the coating channel and a lower coating mechanism arranged on the lower side of the coating channel, the upper coating mechanism comprising a pair of first air-expansion shafts arranged side by side in front and back, each of the first air-expansion shafts being wound with a first film covering the upper surface of the product, the upper coating mechanism being configured to unwind the first film from the pair of first air-expansion shafts to the coating channel; an upper driving component is arranged at one end of each of the first air-expansion shafts, the upper driving component is transmission-connected to the first air-expansion shaft to drive the first air-expansion shaft to rotate around its own axis, and each of the first air-expansion shafts is provided with an upper driving component. The other end of the first air-inflating shaft is provided with an upper adjustment component, and the upper adjustment component is configured to drive the first air-inflating shaft to move back and forth along its own axis; the lower film-coating mechanism includes a pair of second air-inflating shafts arranged side by side front and back, each of the second air-inflating shafts is wound with a second film covering the lower surface of the product, and the lower film-coating mechanism is configured to unwind the second film from the pair of second air-inflating shafts to the film-coating channel; one end of each of the second air-inflating shafts is provided with a lower driving component, and the lower driving component is transmission-connected to the second air-inflating shaft to drive the second air-inflating shaft to rotate around its own axis.

2. The coating device according to claim 1, characterized in that: Each of the upper driving components comprises a first magnetic powder brake and a first long gear transmission-connected to the first magnetic powder brake, and the axis of the first long gear is parallel to the axis of the first air-expansion shaft.

3. The coating device according to claim 2, characterized in that: A first pinion is coaxially sleeved on one end of each of the first air expansion shafts. The first pinion is fixedly connected to the first air expansion shaft and meshes with the first long gear. The length of the first pinion is less than 1 / 2 of the length of the first long gear.

4. The coating device according to claim 1, characterized in that: The upper adjustment component includes an adjustment plate clamped with the other end of the first gas expansion shaft, an adjustment nut arranged on the adjustment plate, an adjustment screw inserted in the adjustment nut, and an adjustment handwheel coaxially arranged with the adjustment screw, the adjustment screw is threadedly connected with the adjustment nut, the adjustment screw is parallel to the first gas expansion shaft, and the adjustment plate is configured to move back and forth along the adjustment screw with the adjustment nut when the adjustment screw rotates around its own axis.

5. The coating device according to claim 4, characterized in that: The other end of the first inflatable shaft is provided with a first limiting groove engaged with the adjusting plate, and at least a portion of the adjusting plate is engaged with the first limiting groove.

6. The coating device according to claim 1, characterized in that: The upper coating mechanism includes a first frame supporting a pair of first air-expansion shafts, and two pairs of rotatable first bearings are arranged on the first frame. One first air-expansion shaft is equipped with a pair of first bearings, and each pair of first bearings is arranged relatively front and back on the lower side of the corresponding first air-expansion shaft and are arranged tangent to the corresponding first air-expansion shaft.

7. The coating device according to claim 1, characterized in that: Each of the lower driving components comprises a second magnetic powder brake and a second long gear transmission-connected to the second magnetic powder brake, and the axis of the second long gear is parallel to the axis of the second air-expansion shaft.

8. The coating device according to claim 7, characterized in that: A second pinion is coaxially sleeved on one end of each second air expansion shaft. The second pinion is fixedly connected to the second air expansion shaft and meshes with the second long gear. The length of the second pinion is less than 1 / 2 of the length of the second long gear.

9. The coating device according to claim 1, characterized in that: The lower coating mechanism also includes a second frame and a moving trolley, at least one of the second air-expanding shafts is rotatably arranged on the second frame, and one of the second air-expanding shafts is equipped with a pair of second bearings, and the pair of second bearings are rotatably arranged on the second frame in a front-to-back manner relative to each other; the moving trolley includes a base, a plurality of moving wheels arranged at the bottom of the base and a handle arranged on the base, and the second frame is fixedly arranged on the base.

10. The coating device according to claim 9, characterized in that: The two ends of each of the second gas expansion shafts are respectively provided with locking components located at the top of the second frame, and the locking components are configured to rotatably restrict the second gas expansion shaft on the second frame from the radial direction of the corresponding second gas expansion shaft.