Ceramic anilox roller for ultra-dilute slurry transfer

Abstract

The utility model relates to a kind of ceramic anilox roll for ultra-sparse slurry transfer, belong to coating technical field, including roll body and ceramic layer, wherein: the roll body is equipped with the ceramic layer, multiple ink holes are equipped on the ceramic layer, the cross-sectional shape of the ink hole is octagon, isolation rib is equipped between adjacent ink hole, the width of the isolation rib is 10 μm ‑35 μm.The above structure, by the width of isolation rib is 10 μm ‑35 μm, the condition that continuous liquid membrane and liquid bridge are formed to ultra-sparse slurry is destroyed, so that doctor can more cleanly remove the slurry of non-net hole area, fundamentally avoids dripping and hanging material phenomenon, and polygonal net hole opening forms the geometric structure that is beneficial to slurry release.

Description

Technical Field

[0001] This utility model belongs to the field of coating technology, and specifically relates to a ceramic anilox roller for transferring ultra-sparse slurry. Background Technology

[0002] Ceramic anilox rollers are key components in precision coating equipment, using their regularly spaced micro-dimples (cells) to quantitatively carry and transfer slurry. In fields such as new energy and specialty electronic materials, ultra-sparse slurries with extremely low solid content, low viscosity, and good flowability are often required (e.g., certain specialty ceramic slurries, graphene dispersions, etc.). In existing technologies, ceramic anilox rollers used for conventional slurries often employ pyramidal or lattice-shaped meshes, resulting in high cell density and relatively large opening ratios. When these rollers are used for ultra-sparse slurries, the excessive sparseness and low surface tension of the slurry cause "liquid bridges" to form between the cells, preventing effective scraping by the doctor blade. During roller rotation, unscraped slurry easily drips from the cells or forms residue in non-coating areas, causing contamination and waste.

[0003] Therefore, in order to address the problem that when anilox rollers are used for ultra-thin slurries, the slurry forms "liquid bridges" between the cells and cannot be effectively scraped off by the scraper, a ceramic anilox roller for transferring ultra-thin slurries is needed. Utility Model Content

[0004] This invention provides a ceramic anilox roller for transferring ultra-thin slurries, addressing the problem in existing anilox rollers where the slurry forms "liquid bridges" between the cells of the anilox roller when used with ultra-thin slurries, making it impossible for the scraper to effectively remove the slurry.

[0005] This utility model is achieved through the following technical solution: a ceramic anilox roller for transferring ultra-sparse slurry, comprising a roller body and a ceramic layer, wherein: The roller body is provided with the ceramic layer, and the ceramic layer is provided with a plurality of ink-receiving holes. The cross-sectional shape of the ink-receiving holes is octagonal, and the isolation ribs are provided between adjacent ink-receiving holes. The width of the isolation ribs is 10μm-35μm.

[0006] To better realize this utility model, the above structure is further optimized, and the depth of the ink-absorbing hole is 15μm - 40μm.

[0007] To better realize this utility model, the above structure is further optimized, and the area of ​​all the ink-absorbing holes accounts for 18% - 35% of the area of ​​the ceramic layer.

[0008] To better realize this utility model, the above structure is further optimized, and the sidewall of the ink-absorbing hole has a taper of 5° - 25°.

[0009] To better realize this utility model, the above structure is further optimized by making the bottom surface of the ink-absorbing hole flat.

[0010] To better realize this utility model, the above structure is further optimized by making the bottom surface of the ink-absorbing hole a circular arc surface.

[0011] To better realize this utility model, the above structure is further optimized, and the ratio of the area of ​​all the isolation ribs to the area of ​​the ceramic layer is 22% - 30%.

[0012] To better realize this utility model, the above structure is further optimized, and the line count of the ceramic anilox roller is 80 lines / inch to 180 lines / inch.

[0013] Compared with the prior art, this utility model has the following advantages: A ceramic anilox roller for transferring ultra-sparse slurry includes a roller body and a ceramic layer, wherein: the ceramic layer is provided on the roller body, the ceramic layer is provided with a plurality of ink-receiving holes, the cross-sectional shape of the ink-receiving holes is octagonal, and the isolation ribs are provided between adjacent ink-receiving holes, the width of the isolation ribs being 10μm-35μm.

[0014] The above structure, by setting the width of the isolation ribs to 10μm-35μm, disrupts the conditions for the formation of continuous liquid film and liquid bridge in ultra-sparse slurry, allowing the scraper to more cleanly remove slurry from non-cell areas, fundamentally avoiding dripping and material sticking. The polygonal cell openings form a geometric structure that is conducive to slurry release. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a front view of the ceramic anilox roller for transferring ultra-sparse slurry according to this utility model; Figure 2 This is a front view of the ink-collecting holes and isolation ribs of the ceramic anilox roller for ultra-sparse slurry transfer in this utility model.

[0017] In the picture: 1-Roller body; 2-Ceramic layer; 3-Ink application hole; 4-Isolation rib. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] In the description of this utility model, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] Example 1: This application provides a ceramic anilox roller for transferring ultra-sparse slurries, comprising a roller body 1 and a ceramic layer 2, wherein: The roller body 1 is provided with a ceramic layer 2, and the ceramic layer 2 is provided with multiple ink holes 3. The cross-sectional shape of the ink holes 3 is octagonal, and the isolation ribs 4 are provided between adjacent ink holes 3. The width of the isolation ribs 4 is 10μm-35μm.

[0022] In practical applications, the ceramic layer 2 can be understood as a functional coating covering the surface of the roller 1, whose main function is to provide high wear resistance and chemical stability. The ceramic layer 2 can be formed by thermal spraying, plasma spraying, or chemical vapor deposition, for example, using alumina, zirconium oxide, or other ceramic materials as coating materials, mainly to maintain structural integrity during long-term use.

[0023] Furthermore, the octagonal cross-sectional shape of the ink-collecting orifice 3 can be understood as an optimized geometric structure aimed at reducing the adhesion resistance of the slurry in the corner areas. Specifically, the octagonal corner transitions reduce the possibility of slurry residue compared to traditional sharp-cornered cell structures. In addition, the cross-sectional shape of the ink-collecting orifice 3 can also employ other polygonal structures, such as hexagons or dodecagons, to achieve a similar slurry release effect.

[0024] The design of the isolation ribs 4, with a width of 10μm to 35μm, can be understood as a physical separation method. Its main function is to prevent the slurry from forming a continuous liquid film or liquid bridge between adjacent ink-receiving holes 3. As a preferred embodiment, the width of the isolation ribs 4 can be adjusted according to the viscosity and surface tension characteristics of the slurry. For example, isolation ribs 4 of different widths can be formed by laser engraving or machining to adapt to different slurry transfer requirements.

[0025] The innovation of this application lies in significantly increasing the physical spacing between cells by optimizing the microstructure design of the anilox roller, thereby disrupting the conditions for the formation of liquid bridges in the ultra-sparse slurry. This design allows the doctor blade to more thoroughly remove slurry from non-cell areas, fundamentally preventing dripping and material accumulation. Simultaneously, the octagonal ink-collecting hole 3 cross-sectional shape combined with the wider isolation ribs 4 effectively solves the problem of abnormal flow of ultra-sparse slurry on the ceramic anilox roller due to low surface tension.

[0026] The working principle of this embodiment is as follows: The ceramic layer 2 on the roller body 1 serves as a basic carrier, providing high wear resistance and chemical stability, ensuring the structural integrity of the anilox roller during long-term operation. Multiple ink holes 3 distributed on the ceramic layer 2 are used to quantitatively carry the slurry. The cross-sectional shape of the ink holes 3 is designed as an octagon, which allows for more uniform release of the slurry during transfer. Specifically, the octagonal corner transitions reduce the adhesion resistance of the slurry at the corners, avoiding the residue problems caused by sharp corners in traditional anilox rollers. Isolation ribs 4 between adjacent ink holes 3 physically separate the cells, preventing lateral diffusion of the slurry. Furthermore, the width of the isolation ribs 4 is set to 10μm to 35μm, significantly increasing the physical spacing between cells. This directly addresses the low surface tension characteristics of ultra-sparse slurry, disrupting the continuous conditions for liquid bridge formation. Therefore, the doctor blade can thoroughly remove the slurry from non-cell areas, effectively solving the problem of ultra-sparse slurry forming liquid bridges on the ceramic anilox roller, which cannot be effectively scraped off by the doctor blade, leading to dripping and material accumulation. As a preferred embodiment, this design not only improves the transfer efficiency of the slurry, but also ensures the uniformity and stability of the coating.

[0027] This application further proposes that the depth of the ink pore 3 is 15μm - 40μm.

[0028] Specifically, the depth of the ink-receiving aperture 3 refers to the distance the cells extend inward from the surface of the ceramic layer 2. This depth can be achieved by using laser engraving technology to form grooves of precise depth on the ceramic layer 2. The selection of this depth range aims to optimize the slurry carrying capacity and transfer efficiency, ensuring that the ultra-sparse slurry can be stably retained in the cells and effectively transferred to the substrate, while avoiding uneven coating problems caused by being too deep or too shallow.

[0029] In detail, the aforementioned depth range design is based on the flowability and surface tension characteristics of ultra-sparse slurries. By controlling the depth of the ink-receiving holes 3 between 15 μm and 40 μm, the filling and release process of the slurry in the cells can be significantly improved. When the anilox roller contacts the substrate, the slurry can be transferred more smoothly from the cells to the substrate surface, thereby improving the uniformity and transfer efficiency of the coating. Furthermore, this design, combined with the octagonal ink-receiving holes 3 on the ceramic layer 2 and the width of the isolation ribs 4, achieves the technical effects of preventing dripping, material buildup, and adapting to ultra-thin coatings. This structural design not only improves the performance of the anilox roller in ultra-sparse slurry applications but also extends its service life.

[0030] This application further proposes that the area of ​​all ink holes 3 accounts for 18% - 35% of the area of ​​the ceramic layer 2.

[0031] Specifically, the area ratio of the ink-receiving holes 3 refers to the proportion of the total area of ​​all ink-receiving holes 3 on a unit area of ​​ceramic layer 2. In practical applications, this ratio can be achieved by adjusting the size, density, or distribution of the ink-receiving holes 3. For example, laser engraving technology can be used to precisely process ink-receiving holes 3 of the required size and distribution on ceramic layer 2. The purpose is to optimize the opening ratio of the anilox roller to meet the micro-coating requirements of ultra-sparse slurries.

[0032] In detail, by limiting the area of ​​the ink-collecting holes 3 to the area of ​​the ceramic layer 2 to between 18% and 35%, the material loading per unit area can be effectively controlled, avoiding the problem of excessive coating thickness caused by excessively high opening ratio. Based on this, the combination of octagonal cross-sectional ink-collecting holes 3 and isolation ribs 4 of a specific width forms a geometric structure conducive to precise slurry transfer. This design not only disrupts the conditions for the formation of continuous liquid films and liquid bridges in ultra-sparse slurries, but also ensures smoother transfer of the slurry from the cells to the substrate, thereby achieving higher transfer efficiency and a more uniform coating. Furthermore, this ratio range, combined with ink-collecting holes 3 of a specific depth, better meets the stable coating requirements for ultra-thin coatings in the fields of new energy and special electronic materials.

[0033] The above technical solution enables precise control of coating of ultra-sparse slurry, solves the problem of excessive coating thickness caused by excessive opening ratio in the existing technology, and improves the performance of anilox roller in micro-coating applications.

[0034] This application further proposes that the sidewall of the ink hole 3 has a taper of 5°-25°.

[0035] Specifically, the ink-receiving holes 3 refer to multiple recessed structures on the ceramic layer 2 designed to accommodate the ink paste. The sidewalls of these recesses can be laser-engraved to create the required taper. The taper angle ranges from 5° to 25°, a range chosen to balance ink flowability and structural stability. This angled design results in larger openings and smaller bottoms in the cells, facilitating ink slippage during transfer and reducing ink adhesion to the sidewalls.

[0036] In detail, the tapered design, combined with the octagonal cross-section ink-receiving holes 3, forms a geometry that facilitates slurry release. As the anilox roller rotates, the slurry flows smoothly along the inclined sidewalls under the influence of centrifugal force and gravity, preventing slurry residue in the cells. Simultaneously, this structural design ensures that the cells maintain their shape integrity during long-term use, preventing structural deformation or slurry retention due to excessive angles. Furthermore, the 410μm - 35μm width design of the isolation ribs further optimizes the slurry flow characteristics, allowing the doctor blade to more cleanly remove slurry from non-cell areas, resulting in higher transfer efficiency and a more uniform coating.

[0037] The above technical solution not only solves the problem of slurry adhesion in the mesh cells leading to poor release, but also achieves more efficient slurry transfer and a more uniform coating effect.

[0038] This application further proposes that the bottom surface of the ink hole 3 is a plane.

[0039] Specifically, the bottom surface of the ink-receiving hole 3 refers to the bottom area inside the cell that is in direct contact with the ink paste. It can be achieved using a completely flat geometric surface, the purpose of which is to provide a support structure without depressions or protrusions, thereby ensuring that the ink paste can flow out smoothly during the transfer process and avoiding residue caused by irregular bottom surface shape.

[0040] In detail, the aforementioned ceramic anilox roller, by setting the bottom surface of the ink-receiving orifice 3 to a flat plane, allows for a more uniform distribution of the slurry within the cells and enables it to flow out more completely from the cells during transfer. The flat bottom surface design effectively avoids the problem of slurry residue in the central area caused by complex bottom surface shapes (such as curved surfaces), thereby improving the overall slurry transfer efficiency and coating uniformity. Simultaneously, this design, combined with the octagonal cross-section of the ink-receiving orifice 3 and the tapered sidewalls, forms a geometric structure conducive to slurry release, further optimizing slurry transfer performance. Furthermore, the flat bottom surface design enhances the mechanical stability of the cell structure, better maintaining its shape integrity during laser engraving and long-term use, thus extending the service life of the anilox roller.

[0041] This application further proposes the above-mentioned ceramic anilox roller, wherein the bottom surface of the ink hole 3 is an arc surface.

[0042] Specifically, the ink-receiving hole 3 refers to the tiny pit structure used to carry and transfer the ink. Its bottom surface adopts a rounded design to effectively reduce the dead corner area at the bottom of the cells. In practical applications, the rounded surface can be achieved through precision laser engraving technology or special grinding process. The purpose is to promote the smooth flow of ink during the transfer process and avoid ink stagnation at the bottom of the cells.

[0043] In detail, by setting the bottom surface of the ink orifice 3 to an arc shape, the slurry can flow and be released more naturally within the cells. When the anilox roller contacts the substrate, the geometry of the arc shape helps the slurry transfer smoothly along the curved surface, reducing residue problems that may be caused by a flat bottom surface. This design is particularly suitable for the transfer of ultra-sparse slurries, ensuring that the slurry is transferred more completely from the cells to the substrate, thereby significantly improving transfer efficiency and coating uniformity. At the same time, the arc shape, combined with the tapered sidewalls of the ink orifice 3, forms a more favorable slurry release structure, further optimizing the slurry transfer performance.

[0044] This application further proposes that the ratio of the area of ​​all the isolation ribs 4 to the area of ​​the ceramic layer 2 is 22% - 30%.

[0045] Specifically, the isolation rib 4 refers to the structure set between adjacent ink-receiving holes 3. Its main function is to separate the ink-receiving holes 3 and prevent the slurry from forming liquid bridges. In practical applications, the isolation rib 4 can be formed on the ceramic layer 2 by laser engraving or machining. Setting the area ratio of the isolation rib 4 between 22% and 30% aims to optimize the structural design of the ceramic anilox roller, ensuring that the isolation rib 4 has sufficient area to provide an effective physical separation barrier, while avoiding occupying too much space in the ceramic layer 2.

[0046] In detail, by controlling the area ratio of the isolation ribs 4 within the range of 22% to 30%, the conditions for the formation of continuous liquid bridges between the cells of the ultra-sparse slurry can be effectively disrupted. This ratio range ensures that the isolation ribs 4 have sufficient width to achieve physical separation while ensuring that the ink-receiving holes 3 can maintain a reasonable distribution density and material loading capacity. On this basis, when the anilox roller contacts the substrate, the slurry can be transferred more smoothly and completely from the ink-receiving holes 3 to the substrate, thereby obtaining higher transfer efficiency and a more uniform coating. In addition, this ratio range is also coordinated with parameters such as the depth and sidewall taper of the ink-receiving holes 3 to achieve a stable and controllable micro-coating effect.

[0047] The above technical solution not only solved the coating problem caused by improper ratio of the isolation ribs 4, but also improved the overall performance of the ceramic anilox roller in the ultra-sparse slurry transfer scenario.

[0048] This application further proposes that the ceramic anilox roller has a line count of 80 lines / inch to 180 lines / inch.

[0049] Specifically, the line count refers to the number of cells arranged per inch of length, which can be achieved by forming a regularly distributed network of cells on the ceramic layer 2 using laser engraving technology. By controlling the laser engraving parameters, such as pulse frequency and movement speed, the cell density can be precisely adjusted. The purpose of introducing this feature is to optimize the cell layout, ensuring sufficient material loading and uniform slurry transfer performance while avoiding the formation of liquid bridges in ultra-sparse slurry.

[0050] In detail, by limiting the line count of the ceramic anilox roller to between 80 lines / inch and 180 lines / inch, liquid bridging caused by excessively dense cells is prevented, while insufficient material loading caused by excessively sparse cells is avoided. Based on this, combined with the octagonal cross-sectional shape of the ink-receiving orifice 3, the width of the isolation ribs 4, and the aperture ratio, a complete cell structure system is formed. This design is particularly suitable for the characteristics of ultra-sparse slurries, enabling stable and controllable micro-coating while ensuring effective doctor blade cleaning. Furthermore, this line count range, combined with the specific depth of the ink-receiving orifice 3 and the sidewall taper, helps improve slurry transfer efficiency and achieve a more uniform coating effect.

[0051] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A ceramic anilox roller for transferring ultra-sparse slurry, characterized in that: Includes a roller body and a ceramic layer, wherein: The roller body is provided with the ceramic layer, and the ceramic layer is provided with a plurality of ink-receiving holes. The cross-sectional shape of the ink-receiving holes is octagonal, and the isolation ribs are provided between adjacent ink-receiving holes. The width of the isolation ribs is 10μm-35μm.

2. A ceramic anilox roller for transferring ultra-sparse slurry according to claim 1, characterized in that: The depth of the ink-absorbing pore is 15μm - 40μm.

3. A ceramic anilox roller for transferring ultra-sparse slurry according to claim 1, characterized in that: The area of ​​all the ink-absorbing holes accounts for 18% - 35% of the area of ​​the ceramic layer.

4. A ceramic anilox roller for transferring ultra-sparse slurry according to claim 1, characterized in that: The sidewalls of the ink-absorbing hole have a taper of 5° to 25°.

5. A ceramic anilox roller for transferring ultra-sparse slurry according to claim 1, characterized in that: The bottom surface of the ink-receiving hole is a plane.

6. A ceramic anilox roller for transferring ultra-sparse slurry according to claim 1, characterized in that: The bottom surface of the ink-receiving hole is an arc surface.

7. A ceramic anilox roller for transferring ultra-sparse slurry according to claim 1, characterized in that: The ratio of the area of ​​all the aforementioned insulating ribs to the area of ​​the ceramic layer is 22% - 30%.

8. A ceramic anilox roller for transferring ultra-sparse slurry according to claim 1, characterized in that: The ceramic anilox roller has a line count of 80 lines / inch to 180 lines / inch.

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