Coating structure and application of structure in decorative paper coating

Abstract

The invention discloses a coating structure and application of the structure in decorative paper coating, and belongs to the field of coating equipment. The device mainly comprises an unwinding and dipping assembly, a drying assembly, a winding assembly and an online cleaning assembly installed at an inlet of the drying assembly. The online cleaning assembly comprises cleaning mechanisms which are arranged on one sides of the guide carrier rollers and do reciprocating motion in the axial direction of the guide carrier rollers, two cleaning mechanisms are arranged on the side edge of each guide carrier roller side by side, and the cleaning paths coincide. According to the coating structure and the application of the coating structure to decorative paper coating, semi-cured resin glue dirt adhered to the surface of the carrier roller is scraped off in real time through reciprocating scanning motion of the cleaning mechanism, the glue dirt is prevented from being accumulated and cured, and the surface of the carrier roller is always kept bright, clean and flat; according to the structure, the defects of indentation, scratch and the like on the surface of the decorative paper caused by glue scale accumulation are effectively eliminated, manual shutdown for cleaning is avoided, continuous production is realized while the product quality is improved, and the production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of coating equipment technology, and in particular to a coating structure and its application in the coating of decorative paper. Background Technology

[0002] Decorative paper is widely used in laminate flooring, furniture veneers, and fire-resistant boards. Its production process mainly includes unwinding, impregnation, metering and extrusion, drying, and winding and cutting. In existing impregnation coating processes, an impregnation tank combined with extrusion rollers is typically used for sizing. The decorative paper is pulled through an impregnation tank filled with resin, allowing the paper fibers to absorb the resin. It then passes through a pair of opposing extrusion rollers. The extrusion rollers serve two main functions: first, they control the amount of resin on the paper through mechanical pressure between the rollers, removing excess resin from the surface; second, they use the friction of the roller surfaces to drive or guide the wet decorative paper into the subsequent drying oven. This traditional impregnation coating structure is simple, technologically mature, and is currently the mainstream configuration on decorative paper production lines.

[0003] However, in existing high-speed impregnation production lines, there is a defect in the inlet transition section of the drying process. When the wet paper web after impregnation and coating enters the high-temperature oven, the resin adhering to the paper web surface evaporates rapidly upon heating, causing a sudden change in its rheological properties, transforming from a low-viscosity liquid to a high-viscosity semi-cured gel. This resin in this state easily adheres to the surface of the guide rollers at the oven inlet. As production continues, the adhered resin rapidly accumulates and undergoes thermal cross-linking and curing, forming an irregular, hard, sticky layer on the roller surface. This not only damages the cylindricity and flatness of the roller surface but also leads to periodic indentations, scratches, and other quality defects on the surface of the decorative paper. Summary of the Invention

[0004] This invention provides a coating structure and its application in decorative paper coating, in order to solve the technical problem in the prior art that semi-cured resin residue easily accumulates on the surface of the guide rollers at the inlet section of the drying oven, which leads to surface quality defects such as periodic indentations or scratches on the decorative paper.

[0005] The present invention employs the following technical solution: a coating structure and its application in decorative paper coating. It includes an unwinding and impregnation assembly for unwinding and impregnating the base paper with coating; a drying assembly disposed on one side of the unwinding and impregnation assembly for drying the impregnated decorative paper; a winding assembly disposed on the side of the drying assembly away from the unwinding and impregnation assembly for winding the dried finished product; and an online cleaning assembly installed at the inlet of the drying assembly. The online cleaning assembly includes a cleaning mechanism disposed on one side of the guide roller at the inlet of the drying assembly. The cleaning mechanism reciprocates along the axial direction of the guide roller to scrape off adhesive residue from the surface of the guide roller. Two sets of the online cleaning assemblies are symmetrically arranged on one side of each guide roller, and the cleaning blades of the two sets of online cleaning assemblies have overlapping cleaning paths during their reciprocating stroke.

[0006] Furthermore, the online cleaning component also includes: a linear guide box, which is horizontally positioned above the inlet of the drying component; the side wall of the linear guide box has a side slot extending along the length direction, and the bottom of the linear guide box has a bottom slot extending along the length direction; a telescopic cylinder, installed at one end of the linear guide box, and a timer connected to the telescopic cylinder is provided on the outside of the drying component for controlling the telescopic cylinder to perform timed telescopic movements; a movable slider, slidably disposed inside the linear guide box and connected to the output end of the telescopic cylinder; and a suspension bracket, one end of which passes through the side slot and is connected to the movable slider.

[0007] Furthermore, the online cleaning component also includes a cleaning scraper, which is installed at one end of the suspension bracket extending to the guide roller, and the cutting edge of the cleaning scraper abuts against the bottom surface of the guide roller, wherein the contact position between the cleaning scraper and the guide roller avoids the supporting surface of the decorative paper.

[0008] Furthermore, the online cleaning component also includes a floating mechanism that penetrates the bottom slot. The floating mechanism includes: a fixed shaft, which is vertically fixed to the bottom of the movable slider and extends downward through the bottom slot; a floating sleeve, which is vertically slidably sleeved on the fixed shaft; a first step, which is fixedly sleeved on the fixed shaft near the upper end; a second step, which is fixedly sleeved on the floating sleeve; and a buffer spring, which is coaxially sleeved on the outer periphery of the floating sleeve, with its upper end connected to the first step and its lower end connected to the second step.

[0009] Furthermore, the online cleaning component also includes a waste collection mechanism, which includes: a waste receiving trough, which is embedded in the bottom of the drying component and located below the guide roller, and has an inverted concave structure with two protruding ends that extend through the bottom of the drying component to receive waste scraped off by the cleaning scraper; a waste discharge port, which is opened on the waste receiving trough near the bottom of both sides and located on the protruding ends; and a pull-out collection box, which is detachably installed on the side of the protruding ends to collect the discharged waste.

[0010] Furthermore, the online cleaning component also includes a scraping mechanism for cleaning accumulated material inside the waste receiving trough. The scraping mechanism includes: a cleaning scraper connected to the lower end of the floating sleeve rod and located inside the waste receiving trough, the cleaning scraper being adapted to contact the bottom of the waste receiving trough during a specific stroke; and a protective cover fitted over the cleaning scraper and the lower end of the floating sleeve rod, having an inverted bowl-shaped structure.

[0011] Furthermore, a spiral groove structure is provided on the inner wall of the waste receiving trough near the upper end. The spiral groove structure includes a first inclined slide and a second horizontal slide and a slide rod that are interconnected. One end of the slide rod is fixed to the side of the floating sleeve rod, and the other end slides into the spiral groove structure. The end of the slide rod that extends into the spiral groove structure is spherical, which is suitable for switching the trajectory between the first inclined slide and the second horizontal slide.

[0012] Furthermore, both ends of the first inclined slide and the second horizontal slide are provided with one-way steps to form a one-way circulation path. When the movable slider drives the floating sleeve to move towards the waste discharge port, the slide rod falls through the step and slides in the second horizontal slide. At this time, the cleaning scraper remains in a low position and contacts the bottom of the waste receiving trough, scraping the waste towards the waste discharge port. When the movable slider moves in the reverse direction to reset, the slide rod is blocked by the step and slides in the first inclined slide, driving the floating sleeve and the cleaning scraper to lift upward, so that the cleaning scraper is separated from the contact with the bottom of the waste receiving trough.

[0013] Furthermore, the drying assembly includes: a support frame; an oven body mounted on the support frame; a mounting frame disposed inside the oven body; a hot air circulation box disposed on the top of the oven body; and a plurality of guide rollers arranged on the mounting frame inside the oven body, wherein one end of the guide roller located at the inlet is connected to a main drive motor disposed outside the oven via a chain to drive the guide roller to rotate.

[0014] Furthermore, the unwinding and impregnation assembly includes an unwinding frame, a raw paper roll rotatably mounted on the unwinding frame, an electrical control cabinet located on the side of the unwinding frame, an impregnation tank for holding the adhesive liquid, a guide transition roller located in the impregnation tank, and a tension adjusting roller group and a compression metering roller group arranged in sequence; the winding assembly includes a winding frame, a finished winding roll rotatably mounted on the winding frame, and a pressure roller for assisting in winding and leveling.

[0015] The above-described at least one technical solution adopted in the embodiments of the present invention can achieve the following beneficial effects: A coating structure and its application in decorative paper coating are disclosed. By setting an online cleaning component at the inlet of the drying assembly, a cleaning mechanism located on one side of the guide roller performs a reciprocating scanning motion along its axial direction. This allows for real-time and proactive scraping of the high-viscosity semi-cured resin adhering to the surface of the guide roller, effectively blocking the accumulation of adhesive residue and the thermal cross-linking curing process under high-temperature conditions. This maintains the ideal cylindricity and smoothness of the guide roller surface. It eliminates defects such as periodic indentations and scratches on the surface of decorative paper caused by adhesive residue accumulation on the roller surface. Furthermore, by setting two cleaning mechanisms side by side on the side of each guide roller and ensuring that their reciprocating motion has overlapping cleaning paths, it ensures thorough coverage of the entire length of the guide roller. Compared to the existing technology that relies on manual wiping during machine downtime, this invention improves the yield of decorative paper coating while achieving continuous production. Attached Figure Description

[0016] The accompanying drawings, which are provided to further illustrate the invention and constitute a part of this invention, are illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention.

[0017] In the attached diagram: Figure 1 This is an overall schematic diagram of a coating structure and its application in decorative paper coating according to this application. Figure 2 for Figure 1 Schematic diagram of the internal structure of the medium drying oven; Figure 3 for Figure 2 A magnified structural diagram at point A; Figure 4 for Figure 2 Schematic diagram of a partial structure; Figure 5 for Figure 4 A magnified structural diagram at point B; Figure 6 for Figure 5 A magnified structural diagram at point C; Figure 7 for Figure 4A schematic diagram of the bottom structure; Figure label: 1. Unwinding and impregnation assembly; 11. Unwinding frame; 12. Raw paper roll; 13. Electrical control cabinet; 14. Impregnation tank; 15. Guide transition roll; 16. Tension adjusting roll group; 17. Extrusion metering roll group; 2. Drying assembly; 21. Support frame; 22. Drying oven body; 23. Hot air circulation box; 24. Main drive motor; 25. Mounting frame; 26. Guide idler roller; 3. Rewinding assembly; 31. Rewinding frame; 32. Finished product rewinding roll; 33. Pressure roll; 4. Online cleaning assembly; 41. 42. Telescopic cylinder; 42. Linear guide box; 421. Side slot; 422. Bottom slot; 43. Moving slider; 44. Suspension bracket; 45. Cleaning scraper; 46. Fixed shaft; 47. First step; 48. Floating sleeve; 49. Second step; 410. Buffer spring; 411. Protective cover; 412. Cleaning scraper; 413. Waste receiving trough; 414. Waste discharge port; 415. Pull-out collection box; 416. First inclined slide; 417. Second horizontal slide; 418. Slide rod. Detailed Implementation

[0018] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0019] The technical solutions provided by the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0020] like Figures 1-7 As shown, the present invention provides a coating structure and its application in decorative paper coating, mainly including an unwinding and impregnation assembly 1 for unwinding and impregnating decorative paper base paper; a drying assembly 2 disposed on one side of the unwinding and impregnation assembly 1 for drying the impregnated decorative paper; a winding assembly 3 disposed on the side of the drying assembly 2 away from the unwinding and impregnation assembly 1 for winding the dried finished product; and an online cleaning assembly 4 installed at the inlet of the drying assembly 2.

[0021] Specifically, the unwinding and impregnation assembly 1 mainly consists of an unwinding frame 11 forming the main frame. A paper roll 12 is rotatably mounted on the unwinding frame 11. An electrical control cabinet 13 is located on the side of the unwinding frame 11, used to integrate and control the electrical system of the entire machine. An impregnation tank 14 for holding the resin solution is also provided on the unwinding frame 11. A guide roller 15 is installed inside the impregnation tank 14 to guide the decorative paper through the resin solution. A tension regulating roller group 16 and a pressure metering roller group 17 are sequentially arranged on the discharge side of the impregnation tank 14 to control the running tension of the decorative paper and the amount of resin applied, respectively.

[0022] The drying assembly 2 includes a support frame 21 serving as the bottom support structure. An oven body 22 is mounted on the support frame 21, and a hot air circulation box 23 is located at the top of the oven body 22 to provide drying hot air. Inside the oven body 22, a mounting frame 25 is provided, and multiple guide rollers 26 are arranged on the mounting frame 25. One end of each guide roller 26 located inside the oven is connected via a chain to a main drive motor 24 located outside the oven, driving the guide roller 26 to rotate and thus providing auxiliary support for the decorative paper during its movement.

[0023] The winding assembly 3 includes a winding frame 31, on which a finished winding roller 32 is rotatably mounted, and a pressure roller 33 is provided to assist in winding and leveling.

[0024] The core improvement of this invention lies in the online cleaning component 4. For example... Figure 2 and Figure 3 As shown, the online cleaning component 4 includes a cleaning mechanism disposed on one side of the guide roller 26 at the inlet of the drying component 2. The cleaning mechanism reciprocates along the axial direction of the guide roller 26 to scrape off the adhesive residue on the surface of the guide roller 26. To ensure thorough cleaning, two sets of online cleaning components 4 are symmetrically arranged on one side of each of the guide rollers 26 located at the inlet of the oven body 22, and the cleaning scrapers 45 of the two sets of online cleaning components 4 have overlapping cleaning paths during their reciprocating stroke.

[0025] like Figures 4-5 As shown, the specific structure of the online cleaning component 4 includes: a linear guide box 42 horizontally spanning inside the oven body 22 and located on one side of the guide roller 26; a side slot 421 extending along the length direction is provided on the side wall of the linear guide box 42; and a bottom slot 422 extending along the length direction is provided at the bottom of the linear guide box 42. The side slot 421 and the bottom slot 422 are connected.

[0026] In this embodiment, the two sets of online cleaning components 4 corresponding to each guide roller 26 are arranged symmetrically side by side and share a common drive source. Specifically, a unique telescopic cylinder 41 is installed at one end of one of the linear guide boxes 42. The telescopic cylinder 41 is located outside the oven body 22, and a timer (not shown in the figure) connected to the telescopic cylinder 41 is provided on the outside of the oven body 22 to control the telescopic cylinder 41 to perform timed telescopic movements. A movable slider 43 is slidably arranged inside the linear guide box 42. The movable slider 43 is connected to the output end of the telescopic cylinder 41, thereby realizing linear reciprocating motion under the drive of the cylinder. A suspension bracket 44 is connected to the movable slider 43, and one end of the suspension bracket 44 passes through the side slot 421 and is fixedly connected to the movable slider 43.

[0027] It should be noted that, in the initial state, there is a certain gap between the two side-by-side movable sliders 43. In order to achieve linkage, the two movable sliders 43 are fixedly connected by a rigid connecting rod (not shown in the figure); the connecting rod is set along the axis through the ends of the two linear guide boxes 42 on opposite sides, so that when the telescopic cylinder 41 drives the first slider to move, the other slider achieves synchronous linear reciprocating motion in the other linear guide box 42 through the connecting rod.

[0028] To ensure that the cleaning paths of the two sets of components overlap, the extension stroke of the telescopic cylinder 41 is set to be greater than or equal to the distance between the two moving sliders 43 (i.e., the initial distance). This stroke setting ensures that at the extreme position of the reciprocating motion, the cleaning trajectories of the two cleaning scrapers 45 overlap in the middle region of the guide roller 26, thereby achieving thorough cleaning along the entire length of the guide roller 26.

[0029] Furthermore, a cleaning scraper 45 is installed at one end of the suspension bracket 44 extending to the guide roller 26, and the cutting edge of the cleaning scraper 45 abuts against the bottom surface of the guide roller 26. It is worth noting that the contact position between the cleaning scraper 45 and the guide roller 26 is deliberately designed to avoid the supporting surface of the decorative paper (i.e., the area outside the contact area on the back of the decorative paper, or to operate below the decorative paper) to prevent scraped waste from contaminating the decorative paper.

[0030] The online cleaning component 4 also includes a floating mechanism disposed through the bottom slot 422. This floating mechanism includes a fixed shaft 46 vertically fixed to the bottom of the movable slider 43, extending downwards through the bottom slot 422 to below the linear guide box 42. A floating sleeve 48 is vertically slidably sleeved on the fixed shaft 46. A first step 47 is fixedly sleeved near the upper end of the fixed shaft 46, and a second step 49 is fixedly sleeved on the floating sleeve 48. A buffer spring 410 is coaxially sleeved on the outer periphery of the floating sleeve 48, with its upper end connected to the first step 47 and its lower end connected to the second step 49. This structure utilizes the elastic force of the buffer spring 410 to allow the floating sleeve 48 and its lower components to elastically float vertically relative to the movable slider 43.

[0031] To effectively collect and remove scraped waste, the online cleaning component 4 also includes a waste collection mechanism. For example... Figures 5-7As shown, the waste collection mechanism includes a waste receiving trough 413 embedded at the bottom of the drying assembly 2. This trough is located below the guide roller 26 and has an inverted concave structure. The waste receiving trough 413 has two protruding ends that extend through the bottom of the drying assembly 2 to collect waste scraped off by the cleaning scraper 45. Waste discharge ports 414 are provided near the bottom sides of the waste receiving trough 413, and these ports are located on the protruding ends. A pull-out collection box 415 is detachably installed on the side of each protruding end to collect the waste discharged from the discharge ports 414, facilitating regular cleaning by workers.

[0032] To prevent sticky waste from accumulating in the receiving trough, the online cleaning assembly 4 also includes a scraping mechanism for cleaning accumulated material inside the waste receiving trough 413. This scraping mechanism includes a cleaning scraper 412 connected to the lower end of the floating sleeve 48. The cleaning scraper 412 is located inside the waste receiving trough 413 and is adapted to contact the bottom of the waste receiving trough 413 during a specific stroke to scrape away the waste. Simultaneously, a protective cover 411 is fitted over the cleaning scraper 412 and the lower end of the floating sleeve 48. This protective cover 411 has an inverted bowl-shaped structure to prevent waste from splashing and contaminating the moving parts above.

[0033] This invention utilizes a mechanical structure to implement the logic of unidirectional waste scraping. For example... Figure 6 As shown, a loop-shaped groove structure is provided on the inner wall of the waste receiving trough 413 near the upper end. This loop-shaped groove structure includes a first inclined slide 416 and a second horizontal slide 417 that are interconnected, as well as a slide rod 418. One-way steps are provided at both connecting ends of the first inclined slide 416 and the second horizontal slide 417, forming a one-way circulation path. One end of the slide rod 418 is fixed to the side of the floating sleeve rod 48, and the other end of the slide rod 418 slides into the loop-shaped groove structure. The end extending into the loop-shaped groove structure is spherical, suitable for switching tracks between the first inclined slide 416 and the second horizontal slide 417.

[0034] When the movable slider 43 drives the floating sleeve 48 to move towards the waste discharge port 414, the sleeve 418 falls through the one-way step and slides into the second horizontal slide rail 417. Because the second horizontal slide rail 417 is at a lower position, the floating sleeve 48 is in a low position under its own weight or spring force. At this time, the cleaning scraper 412 remains in a low position and is in close contact with the bottom of the waste receiving trough 413, scraping the waste in the trough towards the waste discharge port 414 like a bulldozer, and finally falling into the pull-out collection box 415.

[0035] When the movable slider 43 reverses its reset motion, the slide bar 418 cannot return along its original path due to the obstruction of the one-way step and is forced to slide within the first inclined slide rail 416. The first inclined slide rail 416 has an upward slope, which causes the floating sleeve 48 and the cleaning scraper 412 to lift upward (compressing the buffer spring 410), causing the cleaning scraper 412 to disengage from the bottom of the waste receiving trough 413. In this way, during the return stroke, the cleaning scraper 412 returns suspended in the air, preventing the waste that has just been scraped out from being brought back into the trough.

[0036] When it moves to the waste discharge port 414 again, the slide bar 418 passes the step again and falls into the second horizontal slide rail 417, repeating the above scraping action, thereby completing efficient cyclic cleaning.

[0037] The present invention discloses a coating structure and its application in decorative paper coating. The overall workflow is as follows: First, the decorative paper roll 12 is mounted on the unwinding frame 11. Under traction, the paper passes through the impregnation tank 14 and is guided by the guide transition roller 15 into the resin solution for thorough impregnation. Subsequently, the wet paper strip passes sequentially through the tension regulating roller group 16 and the extrusion metering roller group 17 to achieve stable tension and precise control of the amount of adhesive applied. The coated wet paper enters the drying assembly 2, where, supported by the guide roller 26 driven by the main drive motor 24, it moves smoothly within the drying oven 22 and receives hot air drying from the hot air circulation box 23. After drying, the finished decorative paper is wound up by the winding assembly 3, with the pressure roller 33 assisting in ensuring a flat winding end face.

[0038] In the aforementioned production process, to address the issue of semi-cured resin residue easily accumulating on the surface of the guide roller 26 at the oven inlet, the online cleaning component 4 performs periodic automatic cleaning. Specifically, a timer set on the outside of the oven body 22 sets the cleaning cycle, and the telescopic cylinder 41 is periodically controlled to extend and retract. When the telescopic cylinder 41 is activated, its output end pushes the first movable slider 43, which is directly connected to it, to slide along the linear guide box 42, and simultaneously drives the second movable slider 43 to slide in the same direction within its respective linear guide box 42 via a rigid connecting rod. At this time, the two suspension brackets 44 drive two cleaning scrapers 45 to simultaneously perform segmented scanning movement along the axial direction of the guide roller 26. One scraper is responsible for cleaning the first half of the guide roller 26, and the other scraper is responsible for cleaning the second half. Since the stroke setting of the telescopic cylinder 41 covers the distance between the two sliders, the movement trajectories of the two scrapers overlap in the central area of ​​the roller, ensuring that the entire surface of the guide roller 26 remains smooth and flat, thereby effectively preventing residue buildup from causing indentations or scratches on the decorative paper surface.

[0039] When the waste scraped off by the cleaning scraper 45 falls into the waste receiving trough 413 below, the movement of the telescopic cylinder 41 synchronously drives the two floating mechanisms to operate synchronously, performing the waste discharge action. During the outward stroke (moving towards the waste discharge port 414), the sliding rod 418, fixed to the side of the floating sleeve rod 48, is guided by a one-way step into the lower second horizontal slide rail 417. At this time, the floating sleeve rod 48 is in a low position under the action of the buffer spring 410 and its own weight, causing the cleaning scraper 412 at the bottom to slide close to the bottom of the waste receiving trough 413, forcefully scraping the accumulated waste into the waste discharge port 414 and falling into the pull-out collection box 415. During the return stroke (reverse reset), the sliding rod 418 is blocked by the one-way step and forced to slide into the first inclined slide rail 416 with an upward slope, thereby causing the floating sleeve rod 48 and the cleaning scraper 412 to lift upward and compress the buffer spring 410. At this point, the cleaning scraper 412 returns in a suspended state, effectively preventing the discharged waste from being carried back into the tank, thus realizing a one-way circulation cleaning logic of scraping waste on the outward trip and avoiding obstacles on the return trip.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A coating structure and its application in decorative paper coating, characterized in that: The assembly includes an unwinding and impregnation component (1) for unwinding and impregnating the decorative paper base paper; a drying component (2) disposed on one side of the unwinding and impregnation component (1) for drying the impregnated decorative paper; a winding component (3) disposed on the side of the drying component (2) away from the unwinding and impregnation component (1) for winding the dried finished product; and an online cleaning component (4) installed at the entrance of the drying component (2); the online cleaning component (4) includes a cleaning mechanism disposed on one side of the guide roller (26) at the entrance of the drying component (2), the cleaning mechanism reciprocating along the axial direction of the guide roller (26) to scrape off the glue residue on the surface of the guide roller (26); two cleaning mechanisms are arranged side by side along the axial direction on one side of each guide roller (26), and the cleaning scrapers (45) of the two cleaning mechanisms have overlapping cleaning paths during the reciprocating stroke.

2. The coating structure according to claim 1 and its application in decorative paper coating, characterized in that: The online cleaning component (4) further includes: a linear guide box (42), which is horizontally positioned above the inlet of the drying component (2), the side wall of the linear guide box (42) is provided with a side slot (421) extending along the length direction, and the bottom of the linear guide box (42) is provided with a bottom slot (422) extending along the length direction; a telescopic cylinder (41), which is installed at one end of the linear guide box (42), and a timer connected to the telescopic cylinder (41) is provided on the outside of the drying component (2) for controlling the telescopic cylinder (41) to perform timed telescopic actions; a movable slider (43), which is slidably disposed inside the linear guide box (42) and connected to the output end of the telescopic cylinder (41); and a suspension bracket (44), one end of which passes through the side slot (421) and is connected to the movable slider (43).

3. The coating structure according to claim 2 and its application in decorative paper coating, characterized in that: The online cleaning component (4) further includes a cleaning scraper (45) which is installed at one end of the suspension bracket (44) extending to the guide roller (26), and the cutting edge of the cleaning scraper (45) abuts against the bottom surface of the guide roller (26), and the contact position between the cleaning scraper (45) and the guide roller (26) avoids the supporting surface of the decorative paper.

4. The coating structure according to claim 2 and its application in decorative paper coating, characterized in that: The online cleaning component (4) further includes a floating mechanism that penetrates the bottom slot (422). The floating mechanism includes: a fixed shaft (46) that is vertically fixed at the bottom of the movable slider (43) and extends downward through the bottom slot (422); a floating sleeve (48) that is vertically slidably sleeved on the fixed shaft (46); a first step (47) that is fixedly sleeved on the fixed shaft (46) near the upper end; a second step (49) that is fixedly sleeved on the floating sleeve (48); and a buffer spring (410) that is coaxially sleeved on the outer periphery of the floating sleeve (48), with its upper end connected to the first step (47) and its lower end connected to the second step (49).

5. The coating structure according to claim 4 and its application in decorative paper coating, characterized in that: The online cleaning component (4) also includes a waste collection mechanism, which includes: a waste receiving trough (413), which is embedded in the bottom of the drying component (2) and located below the guide roller (26), and has an inverted concave structure with two protruding ends that extend through the bottom of the drying component (2) to receive waste scraped off from the cleaning scraper (45); a waste discharge port (414), which is opened on the waste receiving trough (413) near the bottom of both sides and located on the protruding ends; and a pull-out collection box (415), which is detachably installed on the side of the protruding ends to collect the discharged waste.

6. The coating structure according to claim 5 and its application in decorative paper coating, characterized in that: The online cleaning component (4) also includes a scraping mechanism for cleaning the accumulated material inside the waste receiving trough (413). The scraping mechanism includes: a cleaning scraper (412), which is connected to the lower end of the floating sleeve (48) and located inside the waste receiving trough (413). The cleaning scraper (412) is adapted to contact the bottom of the waste receiving trough (413) in a specific stroke; and a protective cover (411), which is sleeved on the outside of the cleaning scraper (412) and the lower end of the floating sleeve (48) and has an inverted bowl-shaped structure.

7. The coating structure according to claim 6 and its application in decorative paper coating, characterized in that: The waste receiving trough (413) has a spiral groove structure near the upper end of its inner wall. The spiral groove structure includes a first inclined slide (416) and a second horizontal slide (417) that are interconnected, as well as a slide rod (418). One end of the slide rod (418) is fixed to the side of the floating sleeve rod (48), and the other end slides into the spiral groove structure. The end of the slide rod (418) that extends into the spiral groove structure is spherical, which is suitable for switching the trajectory between the first inclined slide (416) and the second horizontal slide (417).

8. The coating structure according to claim 7 and its application in decorative paper coating, characterized in that: Both ends of the first inclined slide (416) and the second horizontal slide (417) are provided with one-way steps to form a one-way circulation path. When the movable slider (43) drives the floating sleeve (48) to move towards the waste discharge port (414), the slide rod (418) falls into and slides in the second horizontal slide (417) after passing the step. At this time, the cleaning scraper (412) remains in a low position and contacts the bottom of the waste receiving trough (413), scraping the waste towards the waste discharge port (414). When the movable slider (43) moves in the reverse reset motion, the slide rod (418) is blocked by the step and enters the first inclined slide (416) to slide, driving the floating sleeve (48) and the cleaning scraper (412) to lift up, so that the cleaning scraper (412) is separated from the contact with the bottom of the waste receiving trough (413).

9. The coating structure according to claim 1 and its application in decorative paper coating, characterized in that: The drying assembly (2) includes: a support frame (21); an oven body (22) mounted on the support frame (21); a mounting frame (25) located inside the oven body (22); a hot air circulation box (23) located on the top of the oven body (22); and a plurality of guide rollers (26) arranged on the mounting frame (25) inside the oven body (22), wherein one end of the guide roller (26) located at the inlet is connected to the main drive motor (24) located outside the oven via a chain to drive the guide roller (26) to rotate.

10. The coating structure according to claim 1 and its application in decorative paper coating, characterized in that: The unwinding and impregnation assembly (1) includes an unwinding frame (11), a raw paper roll (12) rotatably mounted on the unwinding frame (11), an electrical control cabinet (13) located on the side of the unwinding frame (11), an impregnation tank (14) for holding the adhesive liquid, a guide transition roller (15) located in the impregnation tank (14), and a tension adjusting roller group (16) and a compression metering roller group (17) arranged in sequence; the winding assembly (3) includes a winding frame (31), a finished winding roller (32) rotatably mounted on the winding frame (31), and a pressure roller (33) for assisting in winding and leveling.

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