Multi-coating device for coating of paper cup

Abstract

The utility model relates to a paper cup coating repeated coating device which comprises a rack, an unwinding mechanism and a winding mechanism, one end of the rack is a feeding end, the other end of the rack is a discharging end, the unwinding mechanism is arranged at the feeding end, the winding mechanism is arranged at the discharging end, the unwinding mechanism is used for unwinding paper materials, and the winding mechanism is used for winding the paper materials. The unwinding mechanism is used for unwinding paper materials, the winding mechanism is used for winding the paper materials, the coating mechanisms are sequentially arranged on the portion, between the unwinding mechanism and the winding mechanism, of the rack, each coating mechanism comprises a coating assembly and a drying assembly, and the coating assemblies are arranged on the portion, between the unwinding mechanism and the winding mechanism, of the rack. A paper material is unwound by the unwinding mechanism and then sequentially passes through the coating assemblies and the drying assemblies of the multiple sets of coating mechanisms, the coating assemblies are used for coating the paper material with paint, and the drying assemblies are used for drying the paper material coated with the paint. The waterproof and / or oil-proof paper cup has the effect of improving the waterproof and / or oil-proof performance of the paper cup.

Description

Technical Field

[0001] The present application relates to the field of paper cup production, and in particular to a device for multiple coating of paper cups. Background Art

[0002] Paper cups are lightweight, environmentally friendly, hygienic, and easy to handle. They are widely used in beverage, coffee, ice cream and other catering industries, as well as in daily gatherings, picnics, events and other occasions. They are convenient for users to carry, use and handle, while reducing pollution to the environment.

[0003] In order to make paper cups perfectly contain different kinds of liquids, the waterproof and oil-proof properties of the paper materials used to produce paper cups are particularly important. In the process of producing paper cups, a coating roller is usually connected to an external coating liquid supply system, and the coating liquid supply system is controlled by a controller to coat the paper material with coating once or multiple times, that is, the paper material that has been initially produced is unrolled, and then the surface of the paper material is coated with coating by a coating roller or multiple coating rollers, and then the coated paper material is dried by a drying mechanism.

[0004] The problem with the above process is that, since the coating itself has a certain viscosity, when the paper material passes through the coating rollers containing different types of coatings in sequence, different types of coatings will mix with each other along the surface of the paper material, thereby reducing the waterproof and / or oil-proof performance of the paper cup. There is room for improvement. Utility Model Content

[0005] In order to improve the water-proof and / or oil-proof performance of paper cups, the present application provides a paper cup coating multiple-time coating device.

[0006] The paper cup coating multiple coating device provided in this application adopts the following technical solution:

[0007] A paper cup coating multiple coating device comprises a frame, a unwinding mechanism and a winding mechanism, one end of the frame is a feeding end, and the other end is a discharging end, the unwinding mechanism is arranged at the feeding end, and the winding mechanism is arranged at the discharging end, the unwinding mechanism is used to unwind paper materials, and the winding mechanism is used to wind up paper materials, and also comprises a coating mechanism, the coating mechanism is provided with a plurality of groups, and the plurality of groups of coating mechanisms are sequentially arranged on the frame between the unwinding mechanism and the winding mechanism, each group of the coating mechanisms comprises a coating component and a drying component, and the paper material is unwound by the unwinding mechanism and then sequentially passes through the coating components and the drying components of the plurality of groups of coating mechanisms, the coating component is used to coat the paper material with coating, and the drying component is used to dry the paper material coated with coating.

[0008] By adopting the above technical scheme, the paper material is unwound by the unwinding mechanism, so that the paper material passes through several groups of coating mechanisms in sequence along the frame. Since any group of coating mechanisms includes a coating component and a drying component, after the coating component applies the coating to the surface of the paper material, the paper material coated with the coating will be dried by the drying component and then enter the next coating mechanism again. By repeating the above process, different types of coatings can be applied to the paper material in sequence. Compared with the method of first applying different types of coatings to the surface of the paper material in sequence and then drying, the present application applies the coating to the paper material in the method of coating→drying→coating→drying→coating→drying..., which reduces the deformation of the paper material when passing through the coating. At the same time, it solves the problem of different types of coatings mixing with each other along the surface of the paper material to a certain extent, and plays a positive guiding role in improving the waterproof and / or oil-proof performance of the paper cup.

[0009] Preferably, the coating assembly includes a coating roller and a pressure roller, the coating roller is rotatably carried on the frame along the width direction of the frame, the coating roller is externally connected to a coating liquid supply system, the pressure roller is arranged above the coating roller, and a gap is formed between the pressure roller and the coating roller for paper material to pass through, and when the paper material passes along the gap, the coating roller applies coating to the surface of the paper material.

[0010] By adopting the above technical solution, when the paper material reaches the gap, the coating liquid supply system starts to input coating to the coating roller, and the coating is coated on the surface of the paper material along the coating roller. At the same time, through the pressing effect of the pressing roller, the coating can be relatively evenly coated on the surface of the paper material.

[0011] Preferably, a lifting assembly is provided on the frame located at the coating roller, and the lifting assembly includes an adjusting screw and a supporting frame. The adjusting screw is rotatably connected to the frame in a vertical direction, and the pressure roller is rotatably supported on the supporting frame. The supporting frame is threadably matched with the adjusting screw. When the adjusting screw rotates, the supporting frame can rise or fall along the adjusting screw.

[0012] By adopting the above technical solution, the height of the carrier frame in the vertical direction can be adjusted by adjusting the screw, thereby realizing the adjustment of the distance between the pressure roller and the coating roller, thereby facilitating the control of the thickness of the coating applied to the surface of the paper material, and also facilitating the coating of paper materials of different thicknesses, and having high practicality.

[0013] Preferably, the lifting assembly also includes a grating ruler, a slide rail and a slider, the slide rail is arranged on the frame away from the adjusting screw in the vertical direction, the base of the slider is fixedly connected to the carrier frame, the slider is slidably arranged on the slide rail, the grating ruler is arranged on the slider, the detection end of the grating ruler faces the slide rail, and the grating ruler is electrically connected to the controller.

[0014] By adopting the above technical solution, through the cooperation of the slide rail and the slider, the end of the carrier away from the adjusting screw is also in a restrained state, thereby reducing the resistance encountered when adjusting the height of the carrier by adjusting the screw. At the same time, through the cooperation of the grating ruler and the controller, the distance between the clamping roller and the coating roller in the vertical direction can be observed, thereby facilitating the adjustment of the distance between the clamping roller and the coating roller by adjusting the screw.

[0015] Preferably, a detection camera is provided on the frame located at the rear end of the coating roller, and the detection end of the detection camera is arranged upward in the vertical direction. When the paper material coated with the paint passes over the detection camera, the detection camera detects the uniformity of the paint applied on the surface of the paper material, and the detection camera is electrically connected to the controller.

[0016] By adopting the above technical solution, the uniformity of the coating applied on the surface of the paper material is detected by a detection camera. When the detection camera detects that the coating applied on the surface of the paper material has holes (indicating that the amount of coating applied to the surface of the paper material along the coating roller is too small), the detection camera sends a detection signal to the controller, and the controller adjusts the working state of the coating liquid supply system, thereby increasing the amount of coating released along the coating roller, so that the coating can be completely coated on the surface of the paper material.

[0017] Preferably, the drying component includes a drying box and a fan, the drying box is configured as an electric drying box, the drying box is disposed on the frame behind the detection camera, the fan is disposed on the drying box, and the air outlet of the fan faces the inside of the drying box, one end of the drying box is a feed end, and the other end is a discharge end, when the paper material coated with paint is transported along the feed end of the drying box to the discharge end, the fan cooperates with the drying box to dry the paper material coated with paint.

[0018] By adopting the above technical solution, when the paper material coated with the coating passes through the drying box, the drying box itself can generate heat, and the fan is in a working state at this time, so that the air in the drying box is in a flowing state, which is convenient for quickly curing the glue coated on the surface of the paper material.

[0019] Preferably, a stress release component is provided on the frame located behind the drying box, and the stress release component includes a first stress release roller and a second stress release roller, the first stress release roller and the second stress release roller are rotatably carried on the frame along the width direction of the frame, and the second stress release roller is located on the side of the first stress release roller away from the drying box, and at the same time, the height of the first stress release roller in the vertical direction is lower than the height of the coating roller in the vertical direction, and the height of the second stress release roller in the vertical direction is higher than the height of the first stress release roller in the vertical direction, and the paper material is wound around the first stress release roller and the second stress release roller.

[0020] By adopting the above technical solution, after the paper material coated with the coating is dried, the paper material passes along the first stress release roller and the second stress release roller in a curved manner, thereby releasing the stress of the paper material, making it easier to coat the paper material with coating later, and reducing the probability of the coating falling off or wrinkling along the surface of the paper material when the paper material is rolled up again after coating due to excessive stress on the paper material.

[0021] Preferably, the components of the several groups of coating mechanisms are the same.

[0022] By adopting the above technical solution, the components of several groups of coating mechanisms are the same, the components are highly adaptable, and there is no need to additionally design multiple components of different sizes, which plays a positive role in reducing the overall cost.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The present invention sequentially applies the coating to the paper material through the method of coating → drying → coating → drying → coating → drying, etc., which reduces the deformation of the paper material when it passes through the coating. At the same time, it solves the problem of different types of coatings mixing with each other along the surface of the paper material to a certain extent, and plays a positive guiding role in improving the waterproof and / or oil-proof performance of the paper cup;

[0025] 2. Through the cooperation of the grating ruler and the controller, the distance between the pressure roller and the coating roller in the vertical direction can be observed, so that the distance between the pressure roller and the coating roller can be adjusted by adjusting the screw;

[0026] 3. The stress of the paper material is released by the first stress release roller and the second stress release roller, which facilitates the subsequent coating. This reduces the probability of the paint falling off or wrinkling along the surface of the paper material when it is rolled up again after the coating is completed due to excessive stress on the paper material. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1It is a schematic diagram of the overall structure of a paper cup coating multiple coating device in an embodiment of the present application.

[0028] Figure 2 It is a partial structural schematic diagram of a paper cup coating multiple coating device in an embodiment of the present application.

[0029] Figure 3 yes Figure 2 A schematic diagram of the structure from another perspective.

[0030] Figure 4 It is a schematic diagram showing the height value, coating liquid supply and real-time picture of the coating on the surface of paper material displayed on the display screen.

[0031] Figure 5 It is a system principle block diagram of a controller, a grating ruler and a coating liquid supply system of a paper cup coating multiple coating device in an embodiment of the present application.

[0032] Explanation of the reference numerals: 1. Frame; 2. Unwinding mechanism; 21. Roller body; 22. Stand; 3. Winding mechanism; 4. Coating mechanism; 41. Coating assembly; 411. Coating roller; 412. Pressing roller; 42. Drying assembly; 421. Drying box; 422. Fan; 5. Lifting assembly; 51. Adjusting screw; 511. Hand wheel; 52. Carrying frame; 53. Grating scale; 54. Slide rail; 55. Slider; 6. Detection camera; 7. Stress release assembly; 71. First stress release roller; 72. Second stress release roller; 8. Support frame; 9. Carrying plate. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-5 This application is described in further detail.

[0034] The present application embodiment discloses a paper cup coating multiple coating device. Figure 1 A paper cup coating multiple coating device includes a frame 1, a unwinding mechanism 2, a winding mechanism 3 and a coating mechanism 4. One end of the frame 1 is a feeding end, and the other end is a discharging end. The unwinding mechanism 2 is used for unwinding paper materials, and the winding mechanism 3 is used for winding paper materials.

[0035] Among them, the components and installation methods of the unwinding mechanism 2 and the rewinding mechanism 3 are the same, and the components and installation methods of the unwinding mechanism 2 are described in detail here. The unwinding mechanism 2 includes a roller body 21, a driving assembly and a stand 22. The roller body 21 is used to unwind the paper material that has been preliminarily processed to the coating mechanism 4. Two stands 22 are provided. The two stands 22 are oppositely installed on the frame 1 along the width direction of the frame 1. The roller body 21 is rotatably carried on the two stands 22, and the driving assembly includes a driving motor (not shown in the figure). The output shaft of the driving motor is coaxially fixed with the roller body 21. When the output shaft of the driving motor rotates, the roller body 21 is driven to rotate along the stand 22 to realize the unwinding operation of the paper material. It should be noted here that the roller body 21 of the unwinding mechanism 2 is used for unwinding the paper material, and the roller body 21 of the rewinding mechanism 3 is used for rewinding the paper material that has been coated by the coating mechanism 4.

[0036] Further, the coating mechanism 4 is provided with several groups, and the several groups of coating mechanisms 4 are sequentially arranged on the frame 1 between the unwinding mechanism 2 and the winding mechanism 3. Each group of coating mechanisms 4 includes a coating component 41 and a drying component 42. After the paper material is unwound by the roller body 21, it sequentially passes through the coating components 41 and the drying components 42 of the several groups of coating mechanisms 4. In this embodiment, since there are three types of coatings applied to the surface of the paper material, three groups of coating mechanisms 4 are synchronously provided. The coating component 41 is used to apply coatings to the paper material, and the drying component 42 is used to dry the paper material coated with coatings.

[0037] The implementation principle of a multiple coating device for paper cups according to an embodiment of the present application is as follows: the paper material is unwound by the unwinding mechanism 2, so that the paper material passes through three groups of coating mechanisms 4 in sequence along the frame 1. Since any group of coating mechanisms 4 includes a coating component 41 and a drying component 42, after the coating component 41 applies the coating to the surface of the paper material, the paper material coated with the coating will be dried by the drying component 42 and then enter the next coating mechanism 4 again. By repeating the above process, different types of coatings can be applied to the paper material in sequence. Compared with the method of first applying different types of coatings to the surface of the paper material in sequence and then drying them, the present application applies the coating to the paper material in the method of coating → drying → coating → drying → coating → drying, thereby reducing the deformation of the paper material when passing through the coating. At the same time, it solves the problem of different types of coatings mixing with each other along the surface of the paper material to a certain extent, and plays a positive guiding role in improving the waterproof and / or oil-proof performance of the paper cup.

[0038] It should be noted that in this embodiment, the components of the three coating mechanisms 4 are the same, and the installation method is consistent, the components are highly adaptable, and there is no need to design a variety of components of different sizes, which plays a positive role in reducing the overall cost. In the following description, one of the coating mechanisms 4 is taken to explain its installation method and components in detail.

[0039] Reference Figure 2 and Figure 3 The coating assembly 41 includes a coating roller 411 and a pressure roller 412. The coating roller 411 is rotatable along the width direction of the frame 1 and is carried on the frame 1. The coating roller 411 is externally connected to a coating liquid supply system. The pressure roller 412 is arranged above the coating roller 411. A gap is formed between the pressure roller 412 and the coating roller 411 for paper material to pass through. When the paper material passes through the gap, the coating roller 411 applies the coating to the surface of the paper material.

[0040] Specifically, the coating roller 411 is a conventional slurry coating component, and a plurality of holes are evenly distributed on the coating roller 411. When the coating liquid supply system starts to work, the coating liquid supply system starts to release the coating into the coating roller 411, so that the coating in the coating roller 411 is squeezed out along the holes. When the paper material passes through the gap, the coating on the surface of the coating roller 411 can be coated onto the surface of the paper material.

[0041] Furthermore, supporting plates 9 are respectively installed at both ends along the width direction of the frame 1, and the coating roller 411 is rotatably supported on the supporting plates 9 to improve the stability of the coating roller 411 rotating along the frame 1 and reduce the swing of the coating roller 411 during rotation.

[0042] Therefore, when the paper material reaches the gap, the coating liquid supply system starts to inject coating into the coating roller 411, and the coating is released along the holes to the surface of the paper material. At the same time, the pressing action of the pressing roller 412 limits the range of movement of the paper material along the gap, so that the coating can be relatively evenly coated on the surface of the paper material.

[0043] Reference Figure 2 and Figure 3 A lifting assembly 5 is provided on the frame 1 located at the coating roller 411. The lifting assembly 5 includes an adjusting screw 51 and a supporting frame 52. The adjusting screw 51 is rotatably connected to the frame 1 along the vertical direction. The pressure roller 412 is rotatably supported on the supporting frame 52. The supporting frame 52 is threadedly matched with the adjusting screw 51. When the adjusting screw 51 rotates, the supporting frame 52 can rise or fall along the adjusting screw 51.

[0044] Specifically, a support frame 8 is provided on the frame 1 located on one side of the coating roller 411. The spatial position relationship of the support frame 8 is vertical to the frame 1. The adjusting screw 51 is movable in the vertical direction and penetrates the frame 1. At this time, the free end of the adjusting screw 51 is rotatably connected to the support frame 8, and a hand wheel 511 is coaxially fixed to the fixed end of the adjusting screw 51. Correspondingly, a threaded hole is provided at one end of the support frame 52 close to the adjusting screw 51, and the threaded hole is threadedly matched with the adjusting screw 51. Therefore, when the operator turns the hand wheel 511, the adjusting screw 51 is rotatably connected to the frame 1, so that the adjusting screw 51 rotates along the frame 1, so that the support frame 52 threadedly matched with the adjusting screw 51 rises or falls along the adjusting screw 51.

[0045] Therefore, the height of the carrier frame 52 in the vertical direction can be adjusted by adjusting the screw 51, thereby realizing the adjustment of the distance between the pressure roller 412 and the coating roller 411, so as to facilitate the control of the thickness of the coating applied to the surface of the paper material, and also facilitate the coating of paper materials of different thicknesses, which is highly practical.

[0046] Reference Figure 2-Figure 5 The lifting assembly 5 also includes a grating ruler 53, a slide rail 54 and a slider 55. The slide rail 54 is arranged on the frame 1 away from the adjusting screw 51 in the vertical direction. The base of the slider 55 is fixedly connected to the carrier frame 52. The slider 55 is slidably arranged on the slide rail 54. The grating ruler 53 is arranged on the slider 55. The detection end of the grating ruler 53 faces the slide rail 54 and the grating ruler 53 is electrically connected to the controller.

[0047] Specifically, the grating ruler 53 is a device for measuring length, displacement or motion, and its working principle is based on optical interference or photoelectric detection technology. At the same time, the controller can be a computer control system with a dedicated application installed inside. The working status of the coating liquid supply system and the working status of the grating ruler 53 can be observed on the screen in real time. This is a prior art, and its specific composition and working principle will not be described in detail here.

[0048] Therefore, through the cooperation of the slide rail 54 and the slider 55, the end of the carrier 52 away from the adjusting screw 51 is also in a restrained state, reducing the resistance encountered when adjusting the height of the carrier 52 by adjusting the screw 51. At the same time, through the cooperation of the grating scale 53 and the controller, the distance between the pressure roller 412 and the coating roller 411 in the vertical direction can be observed, thereby facilitating the adjustment of the distance between the pressure roller 412 and the coating roller 411 by adjusting the screw 51.

[0049] Its specific working method is: for example: when the thickness of the paper material itself is 0.5mm (international unit, millimeter), the required coating thickness is 0.07mm, and the distance between the coating roller 411 and the pressure roller 412 is adjusted according to the indication of the grating scale 53, that is: when the coating roller 411 and the pressure roller 412 are just in contact, the indication of the grating scale 53 on the screen is in the initial state (0.00mm). At this time, the operator can control the support frame 52 to carry the pressure roller 412 away from the coating roller 411 by turning the hand wheel 511. When it is observed that the indication of the grating scale 53 on the screen is 0.57mm (a tolerance of ±0.02mm is allowed), the distance between the coating roller 411 and the pressure roller 412 is 0.57±0.02mm, so that the thickness of the coating applied to the surface of the paper material meets the design requirements.

[0050] Reference Figure 2 and Figure 4 A detection camera 6 is arranged on the frame 1 at the rear end of the coating roller 411, and the detection end of the detection camera 6 is arranged upward in the vertical direction. When the paper material coated with the paint passes over the detection camera 6, the detection camera 6 detects the uniformity of the paint applied on the surface of the paper material, and the detection camera 6 is electrically connected to the controller.

[0051] Specifically, its working principle is that when the paper material coated with paint reaches above the detection camera 6, the detection camera 6 continuously collects images of the surface of the paper material coated with paint and displays them on the display screen. The images collected by the detection camera 6 are compared through the built-in program. If holes appear in the paint coated on the surface of the paper material, it means that the amount of paint coated on the surface of the paper material along the coating roller 411 is too small. At this time, the controller will adjust the working state of the coating liquid supply system connected to the current coating roller 411 to increase the working power of the current coating liquid supply system, thereby increasing the amount of paint flowing out along the holes of the coating roller 411, so that the surface of the paper material can be completely covered with the paint.

[0052] Reference Figure 2 The drying component 42 includes a drying box 421 and a fan 422. The drying box 421 is configured as an electric drying box. The drying box 421 is arranged on the frame 1 behind the detection camera 6. The fan 422 is arranged on the drying box 421, and the air outlet of the fan 422 faces the inside of the drying box 421. One end of the drying box 421 is a feed port, and the other end is a discharge port. When the paper material coated with paint is transported from the feed end of the drying box 421 to the discharge end, the fan 422 cooperates with the drying box 421 to dry the paper material coated with paint.

[0053] Through the above process, when the paper material coated with paint passes along the drying box 421, the drying box 421 itself can generate heat, and the fan 422 is in working state, so that the air in the drying box 421 is in a flowing state, which is convenient for quickly curing the glue coated on the surface of the paper material.

[0054] Further, see Figure 2 A stress release component 7 is provided on the frame 1 located behind the drying box 421. The stress release component 7 includes a first stress release roller 71 and a second stress release roller 72. The first stress release roller 71 and the second stress release roller 72 are rotatably carried on the frame 1 along the width direction of the frame 1, and the second stress release roller 72 is located on the side of the first stress release roller 71 away from the drying box 421. At the same time, the height of the first stress release roller 71 along the vertical direction is lower than the height of the coating roller 411 along the vertical direction, and the height of the second stress release roller 72 along the vertical direction is higher than the height of the first stress release roller 71 along the vertical direction. The paper material is wound around the first stress release roller 71 and the second stress release roller 72.

[0055] Therefore, after the paper material coated with paint is dried, the paper material passes along the first stress release roller 71 and the second stress release roller 72 in a curved manner, thereby releasing the stress of the paper material, making it easier to coat the paper material with paint later, thereby reducing the probability of the paint falling off or wrinkling along the surface of the paper material when the paper material is rolled up again after coating due to excessive stress on the paper material.

[0056] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A paper cup coating multiple coating device, comprising a frame (1), a unwinding mechanism (2) and a rewinding mechanism (3), wherein one end of the frame (1) is a feeding end and the other end is a discharging end, the unwinding mechanism (2) is arranged at the feeding end, and the rewinding mechanism (3) is arranged at the discharging end, the unwinding mechanism (2) is used to unwind paper materials, and the rewinding mechanism (3) is used to rewind paper materials, and is characterized in that: The invention also comprises a coating mechanism (4), wherein the coating mechanism (4) is provided with a plurality of groups, wherein the plurality of groups of coating mechanisms (4) are sequentially arranged on the frame (1) between the unwinding mechanism (2) and the rewinding mechanism (3), wherein each group of coating mechanisms (4) comprises a coating component (41) and a drying component (42), and after being unwound by the unwinding mechanism (2), the paper material sequentially passes through the coating components (41) and the drying components (42) of the plurality of groups of coating mechanisms (4), wherein the coating component (41) is used to apply coating to the paper material, and the drying component (42) is used to dry the paper material coated with coating.

2. A paper cup coating multiple coating device according to claim 1, characterized in that: The coating assembly (41) comprises a coating roller (411) and a pressure roller (412); the coating roller (411) is rotatably supported on the frame (1) along the width direction of the frame (1); the coating roller (411) is externally connected to a coating liquid supply system; the pressure roller (412) is arranged above the coating roller (411); a gap is formed between the pressure roller (412) and the coating roller (411) for paper material to pass through; when the paper material passes through the gap, the coating roller (411) applies coating to the surface of the paper material.

3. The paper cup coating multiple coating device according to claim 2, characterized in that: A lifting assembly (5) is provided on the frame (1) located at the coating roller (411), and the lifting assembly (5) comprises an adjusting screw (51) and a supporting frame (52). The adjusting screw (51) is rotatably connected to the frame (1) in a vertical direction, and the pressing roller (412) is rotatably supported on the supporting frame (52). The supporting frame (52) is threadably matched with the adjusting screw (51). When the adjusting screw (51) rotates, the supporting frame (52) can rise or fall along the adjusting screw (51).

4. The paper cup coating multiple coating device according to claim 3, characterized in that: The lifting assembly (5) also includes a grating ruler (53), a slide rail (54) and a slider (55), wherein the slide rail (54) is arranged on the frame (1) away from the adjusting screw (51) in the vertical direction, the base of the slider (55) is fixedly connected to the supporting frame (52), the slider (55) is slidably arranged on the slide rail (54), the grating ruler (53) is arranged on the slider (55), the detection end of the grating ruler (53) faces the slide rail (54), and the grating ruler (53) is electrically connected to the controller.

5. The paper cup coating multiple coating device according to claim 2, characterized in that: A detection camera (6) is arranged on the frame (1) at the rear end of the coating roller (411), and the detection end of the detection camera (6) is arranged upward in the vertical direction. When a paper material coated with a coating passes over the detection camera (6), the detection camera (6) detects the coating uniformity of the coating applied on the surface of the paper material. The detection camera (6) is electrically connected to a controller.

6. The paper cup coating multiple coating device according to claim 5, characterized in that: The drying component (42) comprises a drying box (421) and a fan (422); the drying box (421) is configured as an electric heating drying box; the drying box (421) is arranged on the frame (1) behind the detection camera (6); the fan (422) is arranged on the drying box (421), and the air outlet of the fan (422) faces the inside of the drying box (421); one end of the drying box (421) is a feeding end, and the other end is a discharging end; when the paper material coated with paint is transported from the feeding end of the drying box (421) to the discharging end, the fan (422) cooperates with the drying box (421) to dry the paper material coated with paint.

7. The paper cup coating multiple coating device according to claim 6, characterized in that: A stress release component (7) is arranged on the frame (1) located behind the drying box (421), and the stress release component (7) comprises a first stress release roller (71) and a second stress release roller (72), the first stress release roller (71) and the second stress release roller (72) are rotatably supported on the frame (1) along the width direction of the frame (1), and the second stress release roller (72) is located on the side of the first stress release roller (71) away from the drying box (421), and at the same time, the height of the first stress release roller (71) along the vertical direction is lower than the height of the coating roller (411) along the vertical direction, and the height of the second stress release roller (72) along the vertical direction is higher than the height of the first stress release roller (71) along the vertical direction, and the paper material is wound around the first stress release roller (71) and the second stress release roller (72).

8. A paper cup coating multiple coating device according to any one of claims 1 to 7, characterized in that: The components of the several groups of coating mechanisms (4) are the same.

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