A vertical roller coating device and a coating method

Abstract

The application discloses a vertical roller coating device and a coating method, and belongs to the field of roller coating devices. The vertical roller coating device comprises a supporting base, a scraping coating system and a roller fixing device. A lower clamp is arranged on the supporting base and used for clamping the lower end shaft of the roller on the supporting base. An upper clamp is arranged on the roller fixing device and used for clamping the upper end shaft of the roller on the roller fixing device. The scraping coating system comprises a circular ring-shaped scraper and a circular ring-shaped scraper positioning device. The circular ring-shaped scraper is detachably connected with the circular ring-shaped scraper positioning device and is nested on the surface of the roller cylinder together. The circular ring-shaped scraper positioning device drives the circular ring-shaped scraper to slide along the surface of the roller cylinder. According to the application, the circular ring-shaped scraper and the circular ring-shaped scraper positioning device are arranged, the surface of the roller is used as the scraping coating movement reference, the distance between the blade edge of the circular ring-shaped scraper at any position and the surface of the roller is equal, and thus the coating thickness of the surface of the cylindrical roller is kept uniform.

Description

[0001] This application relates to the field of roller coating, specifically to a vertical roller coating device and coating method. Background Technology

[0002] Cylindrical roller molds are widely used in printed product manufacturing due to their high dimensional accuracy. Furthermore, their ability to enable continuous production significantly improves production efficiency and reduces costs, making them popular among businesses. In product manufacturing, a uniform thickness of adhesive is typically applied to the surface of the cylindrical roller to ensure consistent dimensional accuracy. Common devices for applying adhesive to roller surfaces include roller coating machines and spray coating machines, which are more suitable for rollers shorter than one meter. However, the increasing demand for larger products has created a need for larger roller molds. When the roller length is two meters or more, the increased dimensional deviation of the roller itself and the limitations of spray coating equipment make it difficult to achieve a uniform thickness of adhesive on the roller surface using either roller coating or spray coating. Therefore, achieving uniform adhesive application on the surface of large-sized rollers has become a pressing problem for companies. Summary of the Invention

[0003] The purpose of this application is to provide a vertical roller coating apparatus to achieve uniform thickness coating of adhesive on the surface of large-size rollers. In addition, this application also provides a simple, fast, and stable method for applying adhesive of uniform thickness to the surface of large-size rollers.

[0004] The technical solution provided in this application is as follows: A vertical roller coating device, comprising: Support base, coating system and roller fixing device; The support base is provided with a lower clamp for clamping the lower end shaft of the roller; The roller fixing device is equipped with an upper clamp for clamping the upper end shaft of the roller; The coating system includes an annular scraper and an annular scraper positioning device. The annular scraper and the annular scraper positioning device are detachably connected and nested together on the cylindrical surface of the roller. The annular scraper positioning device drives the annular scraper to slide axially along the cylindrical surface of the roller.

[0005] The vertical roller coating device of this application includes a support base, a scraping system, and a roller fixing device. The support base and the roller fixing device are used to fix the lower and upper shafts of the roller, respectively, thereby maintaining the stability of the roller when it is upright. Compared with the horizontal equipment, the roller in this application remains upright, so that the roller itself and the glue on its surface are subjected to a uniform downward gravity, avoiding bending deformation caused by uneven gravity at different positions of the horizontal roller, and uneven thickness caused by uneven force on the glue on the roller surface. This application provides an annular scraper and an annular scraper positioning device, both nested on the cylindrical surface of the roller. The annular scraper positioning device can also drive the annular scraper to slide axially along the cylindrical surface of the roller. By setting the annular scraper positioning device nested on the roller surface, a sliding motion with the roller surface as the positioning reference is formed, thereby causing the annular scraper to also slide with the roller surface as the positioning reference. During the process of the annular scraper sliding and scraping glue on the roller surface, the gap between any position of the annular scraper edge and the roller surface is kept equal, thereby achieving uniform glue coating on the cylindrical surface of the roller.

[0006] In one embodiment, the coating system further includes a drive motor, a first lead screw, and a first slider. The annular scraper positioning device is connected to the first slider, the first slider is nested on the first lead screw, the first lead screw is connected to the drive motor, and the drive motor drives the first slider to move axially along the first lead screw through the first lead screw, thereby driving the annular scraper positioning device and the annular scraper to slide axially along the cylindrical surface of the roller.

[0007] In one embodiment, the scraper positioning device is an air-floating device that does not contact the cylindrical surface of the roller.

[0008] In one embodiment, the scraper positioning device is provided with a roller, which contacts the cylindrical surface of the roller and rolls along the roller axial direction on the roller surface.

[0009] In one embodiment, the vertical roller coating device further includes a glue conveying system, which includes a glue conveying pipe, a glue storage tank, and a second slider. The glue conveying pipe is disposed on the second slider, which is nested on the first lead screw. The glue outlet of the glue conveying pipe is located between the annular scraper and the annular scraper positioning device. The second slider drives the glue conveying pipe to slide along the roller axis, thereby conveying the glue to the roller surface.

[0010] In one embodiment, the distance L1 between the upper end face of the annular scraper and the roller surface is greater than the distance L2 between the lower end face of the annular scraper and the roller surface.

[0011] In an embodiment of this application, the annular scraper is funnel-shaped.

[0012] A vertical roller coating method, implemented based on the vertical roller coating apparatus described in any one of the preceding claims, includes: S1. The roller is hoisted and fixed on the clamp: The roller is hoisted upright, and the lower end shaft and the upper end shaft of the roller are fixed on the lower clamp of the support base and the upper clamp of the roller fixing device, respectively. S2. The annular scraper positioning device and the annular scraper are nested on the surface of the roller, with the annular scraper located at one end of the roller near the support base; S3. Adjust the gap between the annular scraper and the roller surface so that the distance between any position of the annular cutting edge of the annular scraper and the circumferential surface of the roller is equal. S4. Start the scraper system, so that the circular scraper positioning device drives the circular scraper to move at a constant speed from the end near the support base to the end away from the support base, to the set roller coating position, clean the remaining glue on the surface of the circular scraper and / or the roller, remove the roller, and complete the uniform coating of glue on the roller surface.

[0013] In the embodiments of this application, it is only necessary to hoist and fix the roller to the lower clamp of the support base and the upper clamp of the roller fixing device, and turn on the power of each component of the device to automatically complete the coating of the roller with uniform thickness. Therefore, this application provides a simple, fast and stable method for coating a uniform thickness of adhesive on the surface of a large roller.

[0014] In one embodiment, step S0 is included before step S1: pre-coating the roller surface with adhesive.

[0015] In one embodiment, between step S3 and step S4, step S31 is further included: starting the glue supply system and adding glue to the roller surface between the annular scraper and the scraper positioning device. Beneficial effects

[0016] The vertical roller coating device of this application includes a support base, a scraping system, and a roller fixing device. The support base and the roller fixing device are used to fix the lower and upper shafts of the roller, respectively, thereby maintaining the stability of the roller when it is upright. Compared with the horizontal equipment, the roller in this application remains upright, so that the roller itself and the glue on its surface are subjected to a uniform downward gravity, avoiding bending deformation caused by uneven gravity at different positions of the horizontal roller, and uneven thickness caused by uneven force on the glue on the roller surface. This application provides an annular scraper and an annular scraper positioning device, both nested on the cylindrical surface of the roller. The annular scraper positioning device can also drive the annular scraper to slide axially along the cylindrical surface of the roller. By setting the annular scraper positioning device nested on the roller surface, a sliding motion with the roller surface as the positioning reference is formed, thereby causing the annular scraper to also slide with the roller surface as the positioning reference. During the process of the annular scraper sliding and scraping glue on the roller surface, the gap between any position of the annular scraper edge and the roller surface is kept equal, thereby achieving uniform glue coating on the cylindrical surface of the roller.

[0017] The adhesive application method of this application can easily, quickly and stably apply adhesive of uniform thickness to the surface of large-size rollers. Attached Figure Description

[0018] Figure 1 This is a partial structural diagram of a vertical roller coating device according to this application; Figure 2 This is a schematic diagram of a vertical roller coating device according to this application; Figure 3 This is a schematic diagram of the annular scraper positioning device of this application; Figure 4 This is a schematic diagram of the glue delivery system structure of this application; Figure 5 This is a schematic diagram of the dimensions and structure of the annular scraper in this application; Figure 6 This is a schematic diagram of the annular scraper shape structure of this application; Figure 7 This is a flowchart of the adhesive application method of this application.

[0019] The meanings of the reference numerals in the figure are as follows: 1-Support base; 11-Lower clamp; 2-Scraping system; 21-Circular scraper; 22-Circular scraper positioning device; 221-Air hole; 222-Air pipe; 223-Roller; 23-Drive motor; 24-First lead screw; 25-First slider; 3-Roller fixing device; 31-Upper clamp; 4-Roller; 41-Lower shaft; 42-Upper shaft; 51-Glue delivery pipe; 52-Glue storage tank; 53-Second slider. Detailed Implementation

[0020] The terminology used in the implementation section of this application is only for explaining specific embodiments of this application and is not intended to limit this application. The "upper" and "lower" labels in the figures are for the purpose of explaining the installation device in the accompanying drawings of specific embodiments of this application and are not intended to limit this application. Example 1

[0021] like Figure 1 As shown, a vertical roller coating device includes: Support base 1, coating system 2, roller fixing device 3; A lower clamp 11 is provided on the support base 1 to clamp the lower end shaft 41 of the roller 4 onto the support base 1; an upper clamp 31 is provided on the roller fixing device 3 to clamp the upper end shaft 42 of the roller 4 onto the roller fixing device 3. The coating system 2 includes an annular scraper 21 and an annular scraper positioning device 22. The annular scraper 21 and the annular scraper positioning device 22 are detachably connected and nested together on the cylindrical surface of the roller 4. The annular scraper positioning device 22 drives the annular scraper 21 to slide axially along the cylindrical surface of the roller 4 to apply adhesive to the cylindrical surface of the roller 4 with a uniform thickness.

[0022] To further explain, the lower clamp 11 and the upper clamp 31 are general-purpose machine tool clamps such as three-jaw chuck, four-jaw chuck, or flat-jaw vise.

[0023] In one embodiment, a bracket is provided on one side of the support base 1, and the roller fixing device 3 is rotatably connected to the bracket. Rotating the roller fixing device 3 can enable the upper clamp 31 to clamp the upper end shaft 42 of the roller 4 to fix the roller 4, or separate it from the upper end shaft 42 of the roller 4, so that the roller 4 can be removed from the device.

[0024] In one embodiment, a drive motor is added to provide power to the lower clamp 11 on the support base 1 or the upper clamp on the roller fixing device 3, thereby driving the roller to rotate, which plays an auxiliary role in uniform glue application or pre-curing of glue in subsequent processes.

[0025] To further explain, the annular scraper 21 and the annular scraper positioning device 22 can be detachably connected by a screw connection. By making the annular scraper and the annular scraper positioning device detachably connected, it is convenient to replace different models of annular scrapers according to the roller size and coating thickness. The annular scraper positioning device 22 and the annular scraper 21 are nested together on the cylindrical surface of the roller. On the one hand, the annular scraper positioning device can drive the annular scraper to slide along the roller axis. On the other hand, by using the cylindrical surface of the roller as the sliding reference, the sliding of the annular scraper is also based on the cylindrical surface of the roller, thereby maintaining a stable gap between the annular scraper and the cylindrical surface of the roller and ensuring the uniformity of the coating thickness.

[0026] Further explanation: The support base 1 and the roller fixing device 3 are used to fix the lower and upper shafts of the roller, respectively, thereby maintaining the stability of the roller after it is upright. Keeping the roller upright, relative to the transverse roller equipment, allows the roller itself and the glue on its surface to be subjected to a uniform downward gravity, avoiding the bending deformation of the roller surface caused by uneven gravity at different positions of the transverse roller, and the uneven thickness caused by uneven force on the glue on the roller surface. A circular scraper 21 and a circular scraper positioning device 22 are set and nested together on the cylindrical surface of the roller. The circular scraper positioning device can also drive the circular scraper to slide axially along the cylindrical surface of the roller. By setting the circular scraper positioning device nested on the roller surface to form a sliding with the roller surface as the positioning reference, the circular scraper also forms a sliding with the roller surface as the positioning reference. During the process of the circular scraper sliding and scraping glue on the roller surface, the gap between any position of the circular scraper edge and the roller surface is kept equal, thereby achieving uniform glue coating on the cylindrical surface of the roller.

[0027] To further explain, the power for the circular scraper and the circular scraper positioning device to slide along the roller axis in the coating system can be provided by a pneumatic component installed on the circular scraper positioning device; it can also be driven by a motor, lead screw, or slider to move the circular scraper positioning device and the circular scraper; or it can be driven by a motor, traction wheel, and rope to move the circular scraper positioning device and the circular scraper.

[0028] In one implementation, such as Figure 2 As shown, the coating system 2 also includes a drive motor 23, a first lead screw 24, and a first slider 25. The annular scraper positioning device 22 is connected to the first slider 25 via a screw. The first slider 25 is nested on the first lead screw 24. The first lead screw 24 is connected to the drive motor 23. The drive motor 23 drives the first slider 25 to move axially along the first lead screw 24 via the first lead screw 24, thereby driving the annular scraper positioning device 22 and the annular scraper 21 to slide axially along the cylindrical surface of the roller.

[0029] In one implementation, such as Figure 3 As shown in Figure a, the annular scraper positioning device 22 is an air-floating device that does not contact the cylindrical surface of the roller. The device inputs high-pressure air into the air hole 221 through the air pipe 222, forming a high-pressure air layer between the annular scraper positioning device and the roller surface, thereby making the annular scraper positioning device float on the roller surface and forming a stable and uniform gap size with the roller surface.

[0030] In one implementation, such as Figure 3As shown in Figure b, the annular scraper positioning device 22 is equipped with a roller 223. The roller contacts the cylindrical surface of the roller and can roll along the roller axis on the roller surface to form a stable and uniform gap size based on the roller surface.

[0031] In one embodiment, as shown in the figure, the vertical roller coating device further includes a glue conveying system, which includes a glue conveying pipe 51, a glue storage tank 52, and a second slider 53. The glue conveying pipe 51 is disposed on the second slider 53, and the second slider 53 is nested on the first lead screw. The glue outlet of the glue conveying pipe 51 is located between the annular scraper 21 and the annular scraper positioning device 22. The second slider 53 drives the glue conveying pipe 51 to slide along the roller axis, conveying glue to the roller surface.

[0032] To further explain, the second slider 53 can drive the glue delivery tube roller to slide axially, automatically replenishing glue to the roller surface between the annular scraper and the annular scraper positioning device, and then the annular scraper evenly scrapes the glue onto the roller surface.

[0033] To further explain, in one embodiment, the second slider 53 can also be nested separately on the second lead screw (not shown in the figure). The second lead screw is connected to a drive motor, which can be shared with the drive motor of the first lead screw, or a separate drive motor can be added. The drive motor controls the movement of the second slider 53 by rotating the second lead screw, thereby driving the glue delivery tube to move along the roller axis.

[0034] To further explain, one feasible approach is that before the roller is clamped into the vertical roller coating device of this application, the roller surface has already been coated with glue. The vertical roller coating device then scrapes the glue evenly, and the glue delivery system only replenishes the glue in areas on the roller surface where there is insufficient glue. Another feasible approach is that before the roller is clamped into the vertical roller coating device of this application, the roller surface is not coated with glue. The glue is fed onto the roller surface through the glue delivery system, and the glue on the roller surface is scraped evenly by a circular scraper.

[0035] In one embodiment, the vertical roller coating device of this application may also be equipped with a curing device to pre-cure and shape the adhesive on the roller surface.

[0036] In one implementation, such as Figure 5 and Figure 6 As shown, the distance L1 between the upper end face of the annular scraper 21 and the surface of the roller 4 is greater than the distance L2 between the lower end face and the surface of the roller. In the embodiment of this application, the annular scraper 21 is funnel-shaped.

[0037] To further explain, the lower edge of the annular doctor blade forms a precise dimensional gap with the roller surface to ensure even application of the adhesive. The area where the gap widens towards the upper end of the doctor blade is used to store the adhesive scraped by the lower edge of the annular doctor blade. This excess adhesive can replenish areas where insufficient adhesive was applied during the roller surface coating process, reducing waste. It can also be used to store adhesive supplied from the glue dispensing system, which is then evenly coated onto the roller surface by the annular doctor blade.

[0038] In summary, the vertical roller coating device of this application includes a support base 1, a scraping system 2, and a roller fixing device 3. The support base 1 and the roller fixing device 3 are used to fix the lower and upper shafts of the roller, respectively, thereby maintaining the stability of the roller after it is upright. This application keeps the roller upright, and relative to the horizontal equipment, the roller itself and the glue on its surface are subjected to a uniform downward gravity, avoiding bending deformation caused by uneven gravity at different positions of the horizontal roller, and uneven thickness caused by uneven force on the glue on the roller surface. This application provides a circular scraper and a circular scraper positioning device, both nested on the cylindrical surface of the roller. The scraper positioning device can also drive the circular scraper to slide axially along the cylindrical surface of the roller. By setting the circular scraper positioning device nested on the roller surface, a sliding motion with the roller surface as the positioning reference is formed, thereby causing the circular scraper to also slide with the roller surface as the positioning reference. During the process of the circular scraper sliding and scraping glue on the roller surface, the gap between any position of the circular scraper edge and the roller surface is kept equal, thereby achieving uniform glue coating on the cylindrical surface of the roller. Example 2

[0039] This embodiment discloses a vertical roller coating method, which is based on the vertical roller coating device of Embodiment 1. The specific steps are as follows: Figure 7 As shown, it includes: S1. The roller is hoisted and fixed on the clamp: The roller is hoisted upright, and the lower end shaft and the upper end shaft of the roller are fixed on the lower clamp of the support base and the upper clamp of the roller fixing device, respectively. S2. The annular scraper positioning device and the annular scraper are nested on the surface of the roller, with the annular scraper located at one end of the roller near the support base; To further explain, the annular scraper and the annular scraper positioning device can be assembled from multiple semi-circular parts. Thus, even after the shafts at both ends of the roller are fixed by clamps, the semi-circular parts can still be assembled into an annular scraper and an annular scraper positioning device and nested on the roller surface.

[0040] S3. Adjust the gap between the annular scraper and the roller surface so that the distance between any position of the annular cutting edge of the annular scraper and the circumferential surface of the roller is equal. To further explain, the annular scraper fixing device is connected to the first slider via a screw, and the gap between the annular scraper and the roller surface can be adjusted by rotating the screw.

[0041] S4. Start the scraper system, so that the circular scraper positioning device drives the circular scraper to move at a constant speed from the end near the support base to the end away from the support base, to the set roller coating position, clean the remaining glue on the circular scraper or roller surface, remove the roller, and complete the uniform coating of glue on the roller surface.

[0042] In the embodiments of this application, it is only necessary to hoist and fix the roller to the support base and the clamp of the roller fixing device, and turn on the power of each component of the device to automatically complete the coating of the roller with uniform thickness. Therefore, this application provides a simple, fast and stable method for coating the surface of a large roller with uniform thickness.

[0043] In one embodiment, step S2 can be performed simultaneously with step S1. That is, after the roller is hoisted and erected, before the upper and lower shafts are inserted into the upper and lower clamps for fixation, step S2 is performed. Then, the annular scraper positioning device and the arc-shaped scraper are nested on the roller surface, and the lower shaft of the roller is fixed on the lower clamp, and the upper shaft is fixed on the upper clamp. After that, step S3 is performed.

[0044] In one embodiment, step S0 is included before step S1: pre-coating the roller surface with adhesive.

[0045] In one embodiment, between step S3 and step S4, step S31 is further included: starting the glue supply system and adding glue to the roller surface between the annular scraper and the annular scraper positioning device.

[0046] In one embodiment, step S5 is included after step S4: turning on the curing device to pre-cur and shape the adhesive on the roller surface.

[0047] The adhesive application method of this application can easily, quickly and stably apply adhesive of uniform thickness to the surface of large-size rollers.

[0048] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A vertical roller coating device, characterized in that, include: Support base, coating system and roller fixing device; The support base is provided with a lower clamp for clamping the lower end shaft of the roller; The roller fixing device is equipped with an upper clamp for clamping the upper end shaft of the roller; The coating system includes an annular scraper and an annular scraper positioning device. The annular scraper and the annular scraper positioning device are detachably connected and nested together on the cylindrical surface of the roller. The annular scraper positioning device can drive the annular scraper to slide axially along the cylindrical surface of the roller.

2. The vertical roller coating device according to claim 1, characterized in that, The coating system further includes a drive motor, a first lead screw, and a first slider. The annular scraper positioning device is connected to the first slider, the first slider is nested on the first lead screw, the first lead screw is connected to the drive motor, and the drive motor drives the first slider to move along the axial direction of the first lead screw through the first lead screw, thereby driving the annular scraper positioning device and the annular scraper to slide along the axial direction of the roller cylindrical surface.

3. The vertical roller coating device according to claim 1 or 2, characterized in that, The annular scraper positioning device is an air-floating device that does not contact the cylindrical surface of the roller.

4. The vertical roller coating device according to claim 1 or 2, characterized in that, The annular scraper positioning device is equipped with rollers, which contact the cylindrical surface of the roller and roll along the roller axial direction on the roller surface.

5. The vertical roller coating device according to claim 1 or 2, characterized in that, It also includes a glue conveying system, which includes a glue conveying pipe, a glue storage tank, and a second slider. The glue conveying pipe is disposed on the second slider, and the second slider is nested on the first lead screw. The glue outlet of the glue conveying pipe is located between the annular scraper and the annular scraper positioning device. The second slider drives the glue conveying pipe to slide along the roller axis.

6. The vertical roller coating device according to claim 1 or 2, characterized in that, The distance L1 between the upper end face of the annular scraper and the roller surface is greater than the distance L2 between the lower end face of the annular scraper and the roller surface.

7. The vertical roller coating device according to claim 1, characterized in that, The annular scraper is funnel-shaped.

8. A vertical roller coating method, implemented based on the vertical roller coating apparatus according to any one of claims 1-7, characterized in that, include: S1. The roller is hoisted and fixed on the clamp: The roller is hoisted upright, and the lower end shaft and the upper end shaft of the roller are fixed on the lower clamp of the support base and the upper clamp of the roller fixing device, respectively. S2. The annular scraper positioning device and the annular scraper are nested on the surface of the roller, with the annular scraper located at one end of the roller near the support base; S3. Adjust the gap between the annular scraper and the roller surface so that the distance between any position of the annular cutting edge of the annular scraper and the circumferential surface of the roller is equal. S4. Start the scraper system, so that the circular scraper positioning device drives the circular scraper to move at a constant speed from one end close to the support base to the other end away from the support base, to the set roller coating position, clean the remaining glue on the surface of the circular scraper and / or the roller, remove the roller, and complete the uniform coating of glue on the roller surface.

9. The vertical roller coating method according to claim 8, characterized in that, The process includes step S0 before step S1: pre-coating the roller surface with adhesive.

10. The vertical roller coating method according to claim 8, characterized in that, Between step S3 and step S4, step S31 is also included: starting the glue supply system and adding glue to the roller surface between the annular scraper and the annular scraper positioning device.

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