A coater

Abstract

The utility model relates to the field of coating and provide a kind of coating machine, including rack, lifting mechanism, coating disc, driving roller subassembly, coating roller subassembly, compression roller and pushing device;Driving roller subassembly is located on rack, driving roller subassembly and rack can relatively rotate between;Coating roller subassembly is set on rack, coating roller subassembly and rack can relatively rotate between, coating roller subassembly and driving roller subassembly abut, so that driving roller subassembly drives coating roller subassembly to rotate;Compression roller is set on the movable part of pushing device, and compression roller and the movable part of pushing device can relatively slide between;Pushing device is set on rack, pushing device drives compression roller to move in the direction of approaching or moving away from coating roller subassembly, and compression roller and coating roller subassembly are used for clamping base material between;Lifting mechanism is set on rack, coating disc is set on lifting mechanism, lifting mechanism drives coating disc to move up and down, so that driving roller subassembly can enter into coating disc.

Description

Technical Field

[0001] This utility model relates to the field of coating, and in particular to a coating machine. Background Technology

[0002] The core function of a coating machine is to achieve uniform coating on the surface of a substrate. Current technology generally uses a method of immersing the coating roller assembly into the paint tank, and then using pressure rollers to tightly bond the substrate to the coating roller assembly to complete the coating. This process has a significant drawback: the paint carried by the coating roller assembly is prone to overflow during the pressing process, making it difficult to accurately control the coating amount per unit area of ​​the substrate.

[0003] Furthermore, after coating, packaging container substrates may require additional processing to enhance their aesthetics or ensure the airtightness of the packaging. Therefore, specific processing areas need to be reserved on the substrate surface. Current processes require operators to manually apply protective films to cover these specific processing areas before coating, and then peel them off after the coating process is complete. However, this process is cumbersome when handling long substrates; the longitudinally extending protective film not only increases material waste but also leads to inefficient use of manpower and resources. Additionally, locating these periodically occurring specific processing areas presents challenges. Although segmented coating processes can avoid these specific processing areas, the interruption and restart of the process significantly reduces overall processing efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is to solve at least one of the technical problems mentioned above.

[0005] The solution to the technical problem of this utility model is:

[0006] A coating machine includes a frame, a lifting mechanism, a coating tray, a drive roller assembly, a coating roller assembly, a pressure roller, and a feeding device. The drive roller assembly is mounted on the frame and is rotatable relative to the frame. The coating roller assembly is mounted on the frame and is rotatable relative to the frame. The coating roller assembly and the drive roller assembly abut against each other, causing the drive roller assembly to drive the coating roller assembly to rotate. The pressure roller is mounted on a movable part of the feeding device and is slidable relative to the movable part of the feeding device. The feeding device is mounted on the frame and drives the pressure roller to move towards or away from the coating roller assembly. The pressure roller and the coating roller assembly are used to clamp the substrate. The lifting mechanism is mounted on the frame, and the coating tray is mounted on the lifting mechanism. The lifting mechanism drives the coating tray to move up and down, allowing the drive roller assembly to enter the coating tray.

[0007] As a further improvement to the above technical solution, the coating roller assembly includes a mounting frame, a slide rail, a first slider, and a coating roller body. The slide rail is arranged vertically and fixed on the frame. The first slider is disposed on the slide rail and can slide relative to the slide rail. The mounting frame is fixed on the first slider, and the coating roller body is disposed on the mounting frame. The coating roller body and the mounting frame can rotate relative to each other.

[0008] As a further improvement to the above technical solution, the coating roller body includes a roller body and several rubber sleeves. The roller body has multiple screw holes spaced apart along the axial direction of the roller body. The rubber sleeves are fitted onto the roller body, and the screw holes are used to install screws for positioning the rubber sleeves.

[0009] As a further improvement to the above technical solution, the pushing device includes a first cylinder and a second slider. The mounting frame is provided with a sliding groove. The second slider and the sliding groove are slidably connected. The first cylinder is fixed on the frame. The second slider is disposed on the movable part of the first cylinder. The first cylinder drives the second slider to reciprocate along the length direction of the sliding groove. The pressure roller is disposed on the second slider. The pressure roller and the second slider are rotatably connected.

[0010] As a further improvement to the above technical solution, the rubber sleeve is provided with a blind hole for avoidance.

[0011] As a further improvement to the above technical solution, the pressure roller includes a pressure roller body and a plurality of sleeves fitted on the pressure roller body. The pressure roller body is disposed on the second slider, and the pressure roller body and the second slider can rotate relative to each other.

[0012] As a further improvement to the above technical solution, the lifting mechanism includes a rack, a gear, a mounting base, a connecting rod, and an adjusting component. The mounting base is fixed on the frame and has a first horizontally arranged mounting hole. The gear is disposed in the first mounting hole. The mounting base has a vertically arranged through hole, and the rack passes through the through hole. The first mounting hole and the through hole are connected. The rack and the gear mesh with each other. The rack and the paint disc are fixedly connected. The connecting rod and the gear are coaxially connected. The connecting rod is disposed on the frame and is rotatably connected to the frame. The adjusting component is disposed on the frame and is used to lock or adjust the rotation of the connecting rod.

[0013] As a further improvement to the above technical solution, the adjustment assembly includes a handle, a worm, a connecting seat, and a worm wheel. The connecting seat is fixed on the frame, the handle is fixed on the worm, the worm wheel meshes with the worm, the worm wheel is fixed on the connecting rod, and the worm wheel and the connecting rod are coaxially connected.

[0014] As a further improvement to the above technical solution, the coating machine also includes a scraper, a second cylinder, and a swing frame. The swing frame is mounted on the machine frame and can swing relative to the machine frame. The fixed part of the second cylinder is connected to the machine frame by a hinge, and the movable part of the second cylinder is hinged to the swing frame. The second cylinder drives the swing frame to swing. The scraper is mounted on the swing frame and is used to scrape away the coating on the drive roller assembly.

[0015] As a further improvement to the above technical solution, the frame includes a frame body and two guide rods that extend laterally. The two guide rods are respectively disposed on the frame body. The drive roller assembly, the coating roller assembly, the pushing device, and the lifting mechanism are all disposed on the frame body. The coating machine also includes a second motor, a crank, a rocker arm, and a third slider. The second motor is fixed on the frame. The third slider and the guide rods are slidably engaged. The swing arm is mounted on the third slider. One end of the crank and one end of the rocker arm are hinged together. The other end of the crank is connected to the output end of the second motor, so that the output end of the second motor can drive the crank to rotate.

[0016] As a further improvement to the above technical solution, the mounting bracket is provided with an acute-angled corner, and the mounting bracket is provided with a screw. The screw is threadedly connected to the mounting bracket, and a locking space is formed between the screw and the corner. The coating roller body is inserted into the locking space.

[0017] The beneficial effects of this invention are as follows: The active roller assembly drives the coating tray to move up and down through a lifting mechanism, allowing the active roller assembly to be immersed in the coating tray to carry the coating. It then transfers the coating through contact with the coating roller assembly, replacing the traditional method of directly immersing the coating roller assembly in the coating tank, thus reducing excessive coating. The pushing device drives the pressure roller to move closer to or further away from the coating roller assembly, achieving tighter or loosener clamping of the substrate, which to some extent solves the problem of coating overflow caused by uneven pressure during the pressing process. The active roller assembly and the coating roller assembly abut against each other, transferring the coating between them through rolling friction, forming a uniform coating layer and reducing coating thickness fluctuations. Attached Figure Description

[0018] Figure 1 This is one of the isometric views of one embodiment of this utility model;

[0019] Figure 2 This is the second isometric view of one embodiment of this utility model.

[0020] In the attached diagram: 11-Frame body, 12-Guide rod, 13-Corner, 2-Lifting mechanism, 21-Rack, 22-Gear, 23-Mounting base, 24-Connecting rod, 251-Worm gear, 252-Worm, 253-Handle, 3-Paint disc, 4-Drive roller assembly, 5-Paint roller assembly, 51-Mounting frame, 52-Slide rail, 53-First slider, 541-Roller body, 542-Rubber sleeve, 5421-Blind hole, 6-Pressure roller, 61-Pressure roller body, 62-Sleeve, 7-Pushing device, 71-First cylinder, 72-Second slider, 73-Groove, 8-Scraper, 9-Second cylinder, 10-Swing frame. Detailed Implementation

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments have been briefly explained above. Obviously, the described drawings are only a part of the embodiments of this utility model, not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0022] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connection relationships mentioned herein do not simply refer to direct connection of components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.

[0023] The core function of a coating machine is to achieve uniform coating on the surface of a substrate. Current technology generally uses a method of immersing the coating roller assembly into the paint tank, and then using a pressure roller 6 to tightly bond the substrate to the coating roller assembly to complete the coating. This process has a significant drawback: the paint carried by the coating roller assembly is prone to overflow during the pressing process, making it difficult to accurately control the coating amount per unit area of ​​the substrate.

[0024] Therefore, such as Figures 1 to 2As shown, this utility model provides a coating machine, which includes a frame, a lifting mechanism 2, a coating tray 3, a drive roller assembly 4, a coating roller assembly, a pressure roller 6, and a feeding device 7. The drive roller assembly 4 is mounted on the frame, and the drive roller assembly 4 and the frame are rotatable relative to each other. The coating roller assembly is mounted on the frame, and the coating roller assembly and the frame are rotatable relative to each other. The coating roller assembly and the drive roller assembly 4 abut against each other, so that the drive roller assembly 4 drives the coating roller assembly to rotate. The pressure roller 6 is mounted on the feeding device 7. On the movable part of the device 7, the pressure roller 6 and the movable part of the pushing device 7 can slide relative to each other; the pushing device 7 is mounted on the frame, and the pushing device 7 drives the pressure roller 6 to move closer to or away from the coating roller assembly, and the pressure roller 6 and the coating roller assembly are used to clamp the substrate; the lifting mechanism 2 is mounted on the frame, and the coating tray 3 is mounted on the lifting mechanism 2, and the lifting mechanism 2 drives the coating tray 3 to move up and down, so that the active roller assembly 4 can enter the coating tray 3.

[0025] As described above, the active roller assembly 4, driven by the lifting mechanism 2, moves the coating tray 3 up and down, allowing it to be immersed in the tray 3 to carry coating. The active roller assembly 4 then transfers the coating through contact with the coating roller assembly, replacing the traditional method of directly immersing the coating roller assembly in the coating tank and reducing excessive coating load. The pushing device 7 drives the pressure roller 6 to move closer to or further away from the coating roller assembly, achieving tighter or looser clamping of the substrate, which to some extent solves the problem of coating overflow caused by uneven pressure during the pressing process. The active roller assembly 4 abuts against the coating roller assembly, transferring the coating between them through rolling friction, forming a uniform coating layer and reducing coating thickness fluctuations.

[0026] In addition, the separate design of the paint tray 3 and the active roller assembly 4 supports quick changes in paint type, and the lifting mechanism 2 can be adapted to substrates of different thicknesses, improving the equipment's versatility.

[0027] The coating roller assembly and the drive roller assembly 4 abut against each other, and the coating is transferred between them when they roll relative to each other. In one embodiment, the coating roller assembly includes a mounting frame 51, a slide rail 52, a first slider 53, and a coating roller body. The slide rail 52 is vertically arranged and fixed to the frame. The first slider 53 is disposed on the slide rail 52 and can slide relative to the slide rail 52. The mounting frame 51 is fixed to the first slider 53, and the coating roller body is disposed on the mounting frame 51. The coating roller body and the mounting frame 51 can rotate relative to each other. The first slider 53 and the slide rail 52 can slide relative to each other. The mounting frame 51 is disposed on the first slider 53, the slide rail 52 is vertically arranged, and the coating roller body is mounted on the mounting frame 51, positioned above the drive roller assembly 4. Under the influence of gravity, the first slider 53 slides downward along the slide rail 52, and the coating roller body presses against the drive roller assembly 4. As the drive roller assembly 4 rotates, the coating material on the drive roller assembly 4 is transferred to the coating roller body. In this way, gravity is used to naturally press the coating roller body down, forming contact pressure with the drive roller assembly 4, without the need for an additional power device.

[0028] To facilitate convenient processing of the substrate after coating, in one embodiment, the coating roller body includes a roller body 541 and a plurality of rubber sleeves 542. The roller body 541 has multiple threaded holes spaced axially along its axis. The rubber sleeves 542 are fitted onto the roller body 541, and the threaded holes are used to install screws for positioning the rubber sleeves 542. By employing multiple rubber sleeves 542, a groove is formed between adjacent rubber sleeves 542. This groove allows the coating to avoid contact with the substrate, thus preventing coating from being applied to the substrate. Furthermore, the threaded hole design allows the operator to axially limit the movement of the rubber sleeves 542 by tightening the screws.

[0029] Of course, in actual use, it is preferable that the thickness of the screw head is less than the thickness of the rubber sleeve 542.

[0030] In this embodiment, "a plurality of rubber sleeves 542" refers to one or more rubber sleeves 542.

[0031] To periodically avoid certain substrates, in some embodiments, the rubber sleeve is provided with avoidance blind holes 5421 on its circumferential surface. In actual use, operators can select rubber sleeves with different lengths and shapes of avoidance blind holes 5421 according to the actual situation.

[0032] The feeding device 7 is used to drive the pressure roller 6 to press against the coating roller assembly. In one embodiment, the feeding device 7 includes a first cylinder 71 and a second slider 72. The mounting frame 51 is provided with a slide groove 73. The second slider 72 and the slide groove 73 are slidably connected. The first cylinder 71 is fixed on the frame. The second slider 72 is disposed on the movable part of the first cylinder 71. The first cylinder 71 drives the second slider 72 to reciprocate along the length direction of the slide groove 73. The pressure roller 6 is disposed on the second slider 72. The pressure roller 6 and the second slider 72 are rotatably connected relative to each other. The first cylinder 71 serves as a power source, generating linear reciprocating motion through the compression and release of the gas inside it. The second slider 72 is slidably connected to the slide groove 73, allowing the second slider 72 to move along the length direction of the slide groove 73. The movable part of the first cylinder 71 drives the second slider 72 to move along the slide groove 73, and the pressure roller 6 on the second slider 72 moves accordingly, thereby applying pressure to the coating roller assembly. The pressure roller 6 and the second slider 72 are connected in a way that allows them to rotate relative to each other, so that the pressure roller 6 can rotate while applying pressure, thus meeting the rotation requirements during the coating process.

[0033] Of course, in actual use, in order to accurately control the pressure between the pressure roller 6 and the coating roller assembly, the first cylinder 71 can be replaced with a servo electric cylinder.

[0034] To ensure proper alignment between the rubber sleeves 542 on the pressure roller 6 and the coating roller, in one embodiment, the pressure roller 6 includes a main body and a plurality of sleeves 62 fitted onto the main body. The main body is mounted on the second slider 72, and the main body and the second slider 72 are rotatable relative to each other. The main body of the pressure roller 6 may have elongated slots for mounting bolts. The axial positioning of the sleeves 62 can be achieved through the engagement of the bolts and the elongated slots.

[0035] The lifting mechanism 2 is used to adjust the height of the paint tray 3. In one embodiment, the lifting mechanism 2 includes a rack 21, a gear 22, a mounting base 23, a connecting rod 24, and an adjusting component. The mounting base 23 is fixed on the frame and has a horizontally arranged first mounting hole. The gear 22 is disposed in the first mounting hole. The mounting base 23 has a vertically arranged through hole, and the rack 21 passes through the through hole. The first mounting hole and the through hole are connected. The rack 21 and the gear 22 mesh with each other. The rack 21 and the paint tray 3 are fixedly connected. The connecting rod 24 and the gear 22 are coaxially connected. The connecting rod 24 is disposed on the frame and is rotatably connected to the frame. The adjusting component is disposed on the frame and is used to lock or adjust the rotation of the connecting rod 24. The lifting mechanism 2 adjusts the height of the paint tray 3 through the meshing transmission of the gear 22 and the rack 21. Specifically, gear 22 is installed in the first horizontal mounting hole of mounting base 23 and communicates with the vertical through hole. Rack 21 passes through the vertical through hole and meshes with gear 22. When gear 22 rotates, rack 21 moves vertically, thereby driving the connected connecting rod 24 to rotate. Connecting rod 24 is rotatably connected to the frame, so that the height of paint tray 3 changes when connecting rod 24 rotates. Adjustment assembly is provided on the frame to lock or adjust the rotation of connecting rod 24, thereby fixing or adjusting the height of paint tray 3.

[0036] An adjustment assembly is used to fix or adjust the height of the paint tray 3. In one embodiment, the adjustment assembly includes a handle 253, a worm gear 252, a connecting seat, and a worm wheel 251. The connecting seat is fixed to the frame, the handle 253 is fixed to the worm gear 252, the worm wheel 251 meshes with the worm gear 252, and the worm wheel 251 is fixed to the connecting rod 24. The worm wheel 251 and the connecting rod 24 are coaxially connected. The adjustment assembly achieves fine adjustment of the height of the paint tray 3 by using the worm gear 252 transmission mechanism. The user controls the rotation of the worm gear 252 by rotating the handle 253.

[0037] To control the amount of paint picked up by the active roller assembly 4, in one embodiment, the coating machine further includes a scraper 8, a second cylinder 9, and a swing frame 10. The swing frame 10 is mounted on the frame and can swing relative to the frame. The fixed part of the second cylinder 9 is hinged to the frame, and the movable part of the second cylinder 9 is hinged to the swing frame 10. The second cylinder 9 drives the swing frame 10 to swing. The scraper 8 is mounted on the swing frame 10 and is used to scrape away the paint on the active roller assembly 4. The design of the second cylinder 9 allows the scraper 8 to move closer to or further away from the active roller assembly 4.

[0038] To enable the scraper 8 to swing laterally during operation for uniform scraping, in one embodiment, the frame includes a frame body 11 and two laterally extending guide rods 12, each mounted on the frame body 11. The drive roller assembly 4, the coating roller assembly, the pusher device 7, and the lifting mechanism 2 are all mounted on the frame body 11. The coating machine also includes a second motor, a crank, a rocker arm, and a third slider. The second motor is fixed to the frame. The third slider and the guide rods 12 are slidably coupled. The swing frame 10 is mounted on the third slider. One end of the crank and one end of the rocker arm are hinged together, and the other end of the crank is connected to the output end of the second motor, allowing the output end of the second motor to drive the crank to rotate. The second motor drives the crank to rotate, which in turn drives the rocker arm to reciprocate the third slider, causing the swing frame 10 mounted on the third slider to reciprocate along the guide rods 12.

[0039] To facilitate the installation and replacement of the coating roller body, in one embodiment, the mounting bracket 51 has an acute-angled corner 13. The mounting bracket 51 is equipped with a screw, which is threadedly connected to the mounting bracket 51. A locking space is formed between the screw and the corner 13, and the coating roller body is inserted into this locking space. This structure is simple and easy to install. Through this design, operators can easily install and remove the screw, thus facilitating the replacement of the coating roller body. The coating roller body and the inner wall of the corner 13 can slide relative to each other, allowing the coating roller body to rotate.

[0040] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A coating machine, comprising a frame, characterized in that, The coating machine also includes a lifting mechanism (2), a coating tray (3), a drive roller assembly (4), a coating roller assembly, a pressure roller (6), and a pushing device (7); the drive roller assembly (4) is mounted on the frame, and the drive roller assembly (4) and the frame are rotatable relative to each other; the coating roller assembly is mounted on the frame, and the coating roller assembly and the frame are rotatable relative to each other, the coating roller assembly and the drive roller assembly (4) abut against each other, so that the drive roller assembly (4) drives the coating roller assembly to rotate; the pressure roller (6) is mounted on the movable part of the pushing device (7), and the... The moving parts of the pressure roller (6) and the pushing device (7) can slide relative to each other; the pushing device (7) is set on the frame, and the pushing device (7) drives the pressure roller (6) to move closer to or away from the coating roller assembly. The pressure roller (6) and the coating roller assembly are used to clamp the substrate; the lifting mechanism (2) is set on the frame, and the coating tray (3) is set on the lifting mechanism (2). The lifting mechanism (2) drives the coating tray (3) to move up and down, so that the active roller assembly (4) can enter the coating tray (3).

2. The coating machine according to claim 1, characterized in that, The coating roller assembly includes a mounting frame (51), a slide rail (52), a first slider (53), and a coating roller body. The slide rail (52) is arranged vertically and is fixed on the frame. The first slider (53) is disposed on the slide rail (52) and can slide relative to the slide rail (52). The mounting frame (51) is fixed on the first slider (53), and the coating roller body is disposed on the mounting frame (51). The coating roller body and the mounting frame (51) can rotate relative to each other.

3. The coating machine according to claim 2, characterized in that, The coating roller body includes a roller body (541) and several rubber sleeves (542). The roller body (541) has a plurality of screw holes spaced apart along the axial direction of the roller body (541). The rubber sleeves (542) are fitted onto the roller body (541). The screw holes are used to install screws for positioning the rubber sleeves (542).

4. The coating machine according to claim 2, characterized in that, The feeding device (7) includes a first cylinder (71) and a second slider (72). The mounting frame (51) is provided with a slide groove (73). The second slider (72) and the slide groove (73) are slidably connected. The first cylinder (71) is fixed on the frame. The second slider (72) is located on the movable part of the first cylinder (71). The first cylinder (71) drives the second slider (72) to reciprocate along the length direction of the slide groove (73). The pressure roller (6) is located on the second slider (72). The pressure roller (6) and the second slider (72) are rotatably connected.

5. The coating machine according to claim 3, characterized in that, The rubber sleeve has a blind hole on its circumferential surface to avoid obstacles.

6. The coating machine according to claim 1, characterized in that, The lifting mechanism (2) includes a rack (21), a gear (22), a mounting base (23), a connecting rod (24), and an adjusting component. The mounting base (23) is fixed on the frame. The mounting base (23) has a first mounting hole arranged horizontally. The gear (22) is arranged in the first mounting hole. The mounting base (23) has a through hole arranged vertically. The rack (21) is inserted into the through hole. The first mounting hole and the through hole are connected. The rack (21) and the gear (22) mesh with each other. The rack (21) and the paint disc (3) are fixedly connected. The connecting rod (24) and the gear (22) are coaxially connected. The connecting rod (24) is arranged on the frame. The connecting rod (24) and the frame are rotatably connected. The adjusting component is arranged on the frame. The adjusting component is used to lock or adjust the rotation of the connecting rod (24).

7. The coating machine according to claim 6, characterized in that, The adjustment assembly includes a handle (253), a worm (252), a connecting seat, and a worm wheel (251). The connecting seat is fixed on the frame, the handle (253) is fixed on the worm (252), the worm wheel (251) meshes with the worm (252), the worm wheel (251) is fixed on the connecting rod (24), and the worm wheel (251) and the connecting rod (24) are coaxially connected.

8. The coating machine according to claim 1, characterized in that, The coating machine also includes a scraper (8), a second cylinder (9), and a swing frame (10). The swing frame (10) is mounted on the frame and can swing relative to the frame. The fixed part of the second cylinder (9) is connected to the frame by a hinge, and the movable part of the second cylinder (9) is hinged to the swing frame (10). The second cylinder (9) drives the swing frame (10) to swing. The scraper (8) is mounted on the swing frame (10) and is used to scrape away the coating on the active roller assembly (4).

9. The coating machine according to claim 8, characterized in that, The frame includes a frame body (11) and two guide rods (12) that extend laterally. The two guide rods (12) are respectively disposed on the frame body (11). The active roller assembly (4), the coating roller assembly, the material pushing device (7) and the lifting mechanism (2) are all disposed on the frame body (11). The coating machine also includes a second motor, a crank, a rocker arm and a third slider. The second motor is fixed on the frame. The third slider and the guide rods (12) are slidably engaged. The swing frame (10) is disposed on the third slider. One end of the crank and one end of the rocker arm are hinged together. The other end of the crank is connected to the output end of the second motor, so that the output end of the second motor can drive the crank to rotate.

10. The coating machine according to claim 2, characterized in that, The mounting bracket (51) has an acute-angled corner (13) and a screw is provided on the mounting bracket (51). The screw is threadedly connected to the mounting bracket (51), and a locking space is formed between the screw and the corner (13). The coating roller body is inserted into the locking space.

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