Gravure and printing equipment
By setting up a connected second mesh hole on the mesh wall of the gravure printing equipment, the problem of poor transfer caused by the increase of slurry viscosity is solved, and the uniform distribution of slurry and the stability of the print are achieved.
Patent Information
- Application Number
- CN202422612780.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-10-29
AI Technical Summary
As the special coating becomes thinner, the depth of the mesh hole of the gravure roller becomes shallower, and the solvent volatility increases, resulting in an increase in the viscosity of the slurry, and high viscosity deposits are deposited at the bottom of the mesh hole, affecting the transfer quality.
A second net point connected to the first net point is set on the net wall to increase the amount of solvent within a unit area, promote the fluidity of the slurry, and connect the adjacent first net point through the second net point to promote the mixing of new and old slurries.
Improve the fluidity and uniformity of the slurry, reduce high viscosity deposits, ensure the stability and consistency of the print, and avoid bad appearance such as light-colored dots and foil leakage.
Smart Images
Figure CN223187199U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gravure printing, in particular to a gravure plate and printing equipment. Background Art
[0002] With the growing demand for battery cell capacity in the new energy industry, the pole pieces that make up the battery cells are being designed to be longer and longer. Some battery cells with special requirements will be coated with a thin layer of special coating (generally ≤2um) between the substrate and the positive and negative active layers. This coating uses a micro-gravure roller as a coating carrier and is transferred to the copper / aluminum foil substrate through gravure printing equipment. As the special coating becomes thinner and thinner, in order to adapt to the longer and longer size of the battery cell pole pieces, the gravure roller as a carrier is required to have a shallower mesh depth, a higher number of lines, and a larger plate diameter in design. In this context, the amount of solvent contained in the unit area of the anilox roller is reduced, and the distance from the contact point between the scraper and the micro-gravure roller to the contact point between the micro-gravure roller and the printing substrate, and from the contact point between the micro-gravure roller and the printing substrate to the point where the gravure roller is wetted again becomes longer. The amount of solvent volatilization increases during a single printing cycle, which will aggravate the increase in the solid content and viscosity of the slurry carried in the cell, and it is easy to form a high-viscosity material adsorbed at the bottom of the cell. If the normal new slurry and the high-viscosity old slurry cannot be fully mixed during the second infiltration, the high-viscosity slurry will continue to deposit and solidify at the bottom of the cell, which will affect the transfer of the slurry in the cell in the subsequent production process, resulting in poor product appearance. Utility Model Content
[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. The utility model provides a gravure printing plate and printing equipment, wherein a second cell connected to the first cell is provided on the screen wall, thereby increasing the amount of solvent per unit area and the fluidity of the slurry, so that the plate is not easily dried during the transfer process.
[0004] In order to achieve the above object, the utility model provides an intaglio plate, comprising a plate body, wherein the plate body is provided with a plurality of first cells, and a cell wall is formed between adjacent first cells;
[0005] The mesh wall is provided with second mesh cells, the second mesh cells have the same opening direction as the first mesh cells, and the second mesh cells are respectively connected to the first mesh cells on the peripheral side thereof.
[0006] As a preferred solution, center lines of two adjacent mesh walls intersect, the second mesh cells are arranged between the two adjacent mesh walls, and the second mesh cells are respectively connected to a plurality of the first mesh cells.
[0007] As a preferred solution, the first cell includes a first cell surface and a second cell surface, the first cell surface and the second cell surface intersect to form an angle portion, and the angle portion is connected to the second cell to form a slurry flow channel.
[0008] As a preferred solution, the depth of the first cell is a, and the depth of the second cell is b, satisfying: b<a.
[0009] As a preferred solution, 1 / 3a≤b.
[0010] As a preferred solution, b≤2 / 3a.
[0011] As a preferred embodiment, the plate has a first direction, and the projection of the first cell in the first direction is a regular pattern; the center lines of two adjacent cells intersect and form an intersection center point, the distance between the intersection center points at both ends of any cell wall is L1, and the distance between the cutoff point of the second cell and the cell wall and the intersection center point is L2, wherein L2 / L1≤1 / 4.
[0012] As a preferred embodiment, the edge of the mesh wall has a mesh wall side surface, and the mesh wall side surface extends along the extension direction of the mesh wall; at the outer edge of the same first mesh cell, the planes of two adjacent mesh wall side surfaces intersect to form an intersection line, and the minimum distance from the intersection center point to the intersection line is c, where L2>c.
[0013] As a preferred solution, the first cells are arranged at equal intervals, or the second cells are arranged at equal intervals along the extension direction of the mesh wall, or the first cells are arranged in a matrix.
[0014] A printing device comprises the gravure plate.
[0015] Compared with the prior art, the present invention provides a gravure printing plate and printing equipment with the following beneficial effects: the second cells increase the ink carrying capacity per unit area of the plate, that is, increase the amount of solvent per unit area of the plate, and can mitigate the rapid increase in viscosity and solid content of the slurry in the first cells due to solvent evaporation. The first cells are interconnected through the second cells, allowing the slurries in adjacent first cells to flow between each other, increasing the fluidity of the slurry and preventing it from drying out during the transfer process. At the same time, the secondary infiltrated slurry can enter the first cells through the second cells, increasing the slurry entry channels for the first cells, allowing the residual slurry in the first cells to be secondary infiltrated from multiple angles simultaneously, and promoting the mixing of new and old slurries. The second cells are simultaneously interconnected with multiple first cells, promoting the flow of slurry within the connected first cells, ensuring that the slurry is evenly distributed within the first cells, and can alleviate the poor transfer appearance caused by uneven slurry distribution at the intersection of the mesh walls when the slurry leveling is poor, such as light spots and foil leakage, thereby ensuring the stability and consistency of the printed product quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present utility model.
[0017] Figure 2 It is a top view of embodiment 1 of the present utility model.
[0018] Figure 3 It is a schematic diagram of the overall structure of Example 2 of the present utility model.
[0019] Figure 4 It is a top view of embodiment 3 of the present utility model.
[0020] Figure 5 This utility model Figure 4 Schematic diagram of the enlarged structure at A in FIG.
[0021] Figure 6 It is a cross-sectional structural diagram of Example 3 of the present utility model.
[0022] Figure 7 It is a top view of embodiment 4 of the present utility model.
[0023] Figure 8 This utility model Figure 7 Schematic diagram of the enlarged structure at B in FIG.
[0024] In the picture:
[0025] 10. Typeface;
[0026] 20. First mesh cell; 21. First cell surface; 22. Second cell surface; 23. Slurry flow channel;
[0027] 30. Net wall; 33. Intersection line; 34. Net wall side;
[0028] 40. Second network point; 41. Intersection center point;
[0029] X, first direction. DETAILED DESCRIPTION
[0030] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0031] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used in the present invention to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0032] In the description of the present invention, it should be understood that the terms "connected," "connected," "fixed," etc. used in the present invention should be interpreted broadly. For example, the terms may refer to fixed connection, detachable connection, or integration; mechanical connection, welding connection; direct connection, indirect connection through an intermediate medium, internal communication between two elements, or interaction between two elements, unless otherwise explicitly defined. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.
[0033] like Figures 1 to 8 As shown, a preferred embodiment of the present invention is an intaglio plate, comprising a plate body 10, the plate body 10 is provided with a plurality of first mesh cells 20, and mesh walls 30 are formed between adjacent first mesh cells 20;
[0034] The mesh wall 30 is provided with second cells 40 . The second cells 40 have the same opening direction as the first cells 20 . The second cells 40 are connected to the first cells 20 on the surrounding sides thereof.
[0035] A printing device includes a gravure plate.
[0036] In the gravure printing plate and printing equipment of the present invention, the second cells 40 increase the ink carrying capacity per unit area of the plate 10, thereby increasing the amount of solvent per unit area of the plate 10. This can mitigate the rapid increase in viscosity and solid content of the slurry in the first cells 20 due to solvent evaporation. The first cells 20 are interconnected through the second cells 40, allowing the slurry in adjacent first cells 20 to flow between them, improving the fluidity of the slurry and preventing it from drying out during the transfer process. Furthermore, the secondary infiltrated slurry can enter the first cells 20 through the second cells 40, increasing the slurry flow channels in the first cells 20. This allows residual slurry in the first cells 20 to be re-infiltrated simultaneously from multiple angles, promoting the mixing of new and old slurries. The second cells 40 are interconnected with the plurality of first cells 20, promoting the flow of slurry within the connected first cells 20 and evenly distributing the slurry within the first cells 20. This can alleviate the problem of poor transfer appearance, such as light spots and foil leakage, caused by uneven slurry distribution at the intersection of the mesh walls 30 when the slurry has poor leveling properties, thereby ensuring the stability and consistency of printed quality.
[0037] Further, such as Figures 1 to 8As shown, the centerlines of two adjacent mesh walls 30 intersect, and second cells 40 are positioned between them. Each second cell 40 communicates with multiple first cells 20. The centerlines of adjacent mesh walls 30 intersect, and the second cells 40 are positioned between them. This reduces significant variations in the cell angles of the second cells 40 during the transfer process, ensuring uniform slurry transfer and improving print quality. Furthermore, the second cells 40 can connect with more first cells 20, enhancing their ability to promote slurry flow in the first cells 20.
[0038] Further, such as Figure 1 As shown, the first cell 20 includes a first cell surface 21 and a second cell surface 22. The first cell surface 21 and the second cell surface 22 intersect to form an angle, which is connected to the second cell 40 to form a slurry flow channel 23. The angle within the first cell 20 is prone to blockage due to obstructed slurry flow, which in turn causes slurry unevenness. The angle where the first cell surface 21 and the second cell surface 22 intersect is connected to the second cell 40 to form a slurry flow channel 23. Slurry flows through the angle, promoting slurry flow in the angle within the first cell 20 and improving slurry uniformity within the first cell 20.
[0039] Further, such as Figure 6 As shown, the depth of the first cell 20 is a, and the depth of the second cell 40 is b, satisfying the following relationship: b < a. The first cell 20 is the base cell and has a set depth to ensure that the amount of slurry within the first cell 20 meets the transfer requirements during the transfer process. The second cell 40 is connected to the first cell 20 located on its periphery to promote the flow of slurry within the first cell 20.
[0040] Further, such as Figure 6 As shown, the depth of the first cell 20 is a, and the depth of the second cell 40 is b, satisfying 1 / 3a≤b. The slurry discharge rate within the cells of the gravure roll is generally approximately 30% to 40%. The depth of the second cell 40 is greater than or equal to 1 / 3 of the depth of the first cell 20 to ensure that the slurry in the adjacent first cell 20 can flow through the second cell 40.
[0041] Further, such as Figure 6As shown, the depth of the first cells 20 is a, and the depth of the second cells 40 is b, where b is ≤ 2 / 3a. When the scraper scrapes excess slurry from the anilox roller surface, it exerts a force on the slurry, pushing it to flow. This force causes the slurry to flow in a specific direction between the first cells 20 through the interconnecting second cells 40. This results in inconsistent ink loading in the first cells 20 at the edges and in the center of the anilox roller. The ink loading in the first cells 20 at the edges of the anilox roller is generally greater than that in the center. As a result, the thickness of the applied slurry, or product, at the edges of the anilox roller is greater than that in the center. This leads to a significant thickness accumulation effect at the winding end, known as the "thick edge phenomenon." Setting the second cells 40 within an appropriate depth range ensures slurry flow while exerting a restraining force, maintaining the slurry's fluidity between the first cells 20 within an appropriate range and preventing the thick edge phenomenon.
[0042] Further, such as Figure 2 、 Figure 5 as well as Figure 8 As shown, the plate 10 has a first direction X. The projection of the first cells 20 in the first direction X forms a regular pattern. The centerlines of two adjacent cell walls 30 intersect to form a central intersection 41. The distance between the central intersection 41 at the two ends of any cell wall 30 is L1. The distance between the cutoff point of the second cell 40 and the cell wall 30 and the central intersection 41 is L2, where L2 / L1 ≤ 1 / 4. If L2 / L1 is greater than 1 / 4, the second cells 40 occupy too much space on the cell wall 30, reducing the confinement effect of the cell wall 30 on the slurry in the first cells 20 and the contact area of the slurry in the first cells 20. This results in uncontrollable slurry flow direction and affects the ink carrying capacity of the slurry.
[0043] The cut-off point is located at the intersection of the second cell 20 and the cell wall 30. Figure 2 As shown, the projections of the second cells 20 and the mesh walls 30 in the first direction X intersect to form a straight line, and the straight line is perpendicular to the extension direction of the mesh walls 30. The intersection point of the straight line and the extension direction of the mesh walls 30 is the cut-off point P1.
[0044] like Figure 8 As shown, when the projection of the second cell 20 in the first direction X is a circle, the center of the circle is the intersection center point 41, the circle intersects with the projection of the mesh wall 30 in the first direction X to form an arc, the cutoff point P1 is located on the arc, and L2 is equal to the radius of the circle.
[0045] As one embodiment, Figures 1-8As shown, the plate body 10 has a plate surface perpendicular to a first direction X, wherein first cells 20, second cells 40, and cell walls 30 are respectively arranged on the plate surface. By arranging the first cells 20, second cells 40, and cell walls 30 on the same plate surface, the first cells 20 ensure uniform and stable distribution of the slurry on the plate surface during the transfer process, thereby improving product quality and consistency. The first cells 20 are connected by the second cells 40 to enhance slurry flow between the first cells 20. The cell walls 30 prevent slurry from seeping between the cells during the transfer process, thereby protecting the integrity and stability of the cells. The cooperation of the first cells 20, second cells 40, and cell walls 30 alleviates the drying problem of large-diameter micro-concave rollers. The plate body is arranged axially around the concave roller, with the first cells 20, second cells 40, and cell walls 30 located on the outer circumference of the concave roller.
[0046] As one embodiment, Figures 1-8 As shown, the first cells 20 are regular polygons. Regular polygon structures facilitate the processing of the plate body 10. For example, triangles, rectangles, squares, rhombuses, or hexagons, regular polygon structures facilitate the processing of the plate body 10.
[0047] As one embodiment, the shape of the second cells 40 is not limited.
[0048] As one embodiment, Figure 5 as well as Figure 8 As shown, the second cells 40 are circular or regular polygonal.
[0049] Further, such as Figure 5 as well as Figure 8 As shown, the edge of the mesh wall 30 has a mesh wall side surface 34, which extends along the extension direction of the mesh wall 30. At the outer edge of the same first mesh cell 20, the planes of two adjacent mesh wall side surfaces 34 intersect to form an intersection line 33. The minimum distance between the intersection line 33 and the intersection center 41 is c. That is, an inscribed circle is formed with the intersection center 41 as the center and c as the radius, and the intersection line is located at the edge of the inscribed circle. Among them, L2>c can ensure that the second mesh cell 40 can be fully connected with the first mesh cell 20, thereby ensuring the fluidity of the slurry.
[0050] As one embodiment, Figures 1-8 As shown, the first cells 20 are regular polygons, and opposite side surfaces 34 of the same cell wall 30 are arranged in parallel.
[0051] Further, such as Figures 1-8 As shown, adjacent first cells 20 are arranged at equal intervals to ensure uniformity during the slurry transfer process and to ensure printing quality.
[0052] Further, such as Figures 1-8As shown, adjacent second cells 40 are arranged at equal intervals along the extension direction of the mesh wall 30 to ensure uniformity during the slurry transfer process and to ensure printing quality.
[0053] Further, such as Figures 1-8 As shown, the first cells 20 are arranged in a matrix, which can ensure that each cell can evenly and stably carry a certain amount of slurry during the rotation of the concave roller, which helps to achieve a more consistent coating thickness during the coating process, thereby improving the coating uniformity and quality of the product.
[0054] In summary, the embodiments of the present invention provide a gravure printing plate and printing apparatus. The second cells 40 increase the ink carrying capacity per unit area of the plate 10, that is, increase the amount of solvent per unit area of the plate 10, which can mitigate the rapid increase in viscosity and solid content of the slurry in the first cells 20 due to solvent evaporation. The first cells 20 are interconnected through the second cells 40, allowing the slurry in adjacent first cells 20 to flow between them, increasing the fluidity of the slurry and preventing it from drying out during the transfer process. Furthermore, the secondary infiltrated slurry can enter the first cells 20 through the second cells 40, increasing the number of slurry entry channels in the first cells 20. This allows residual slurry in the first cells 20 to be re-infiltrated simultaneously from multiple angles, promoting the mixing of new and old slurries. The second cells 40 are interconnected with the plurality of first cells 20, promoting the flow of slurry within the connected first cells 20 and evenly distributing the slurry within the first cells 20. This can alleviate the problem of poor transfer appearance, such as light spots and foil leakage, caused by uneven slurry distribution at the intersection of the mesh walls 30 when the slurry has poor leveling properties, thereby ensuring the stability and consistency of printed quality.
[0055] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.
Claims
1. A gravure printing plate, characterized in that: The plate comprises a plate body, wherein the plate body is provided with a plurality of first cells, and a cell wall is formed between adjacent first cells; The mesh wall is provided with second mesh cells, the second mesh cells have the same opening direction as the first mesh cells, and the second mesh cells are respectively connected to the first mesh cells on the peripheral side thereof.
2. The intaglio plate according to claim 1, wherein: Center lines of two adjacent mesh walls intersect, the second mesh cells are arranged between the two adjacent mesh walls, and the second mesh cells are respectively connected with a plurality of the first mesh cells.
3. The intaglio plate according to claim 1, wherein: The first cell includes a first cell surface and a second cell surface. The first cell surface and the second cell surface intersect to form an angle portion. The angle portion is connected to the second cell surface to form a slurry flow channel.
4. The intaglio plate according to claim 1, wherein: The depth of the first cell is a, and the depth of the second cell is b, satisfying: b<a.
5. The intaglio plate according to claim 4, wherein: 1 / 3a≤b.
6. The intaglio plate according to claim 4, wherein: b≤2 / 3a.
7. The intaglio plate according to claim 1, wherein: The plate has a first direction, and the projection of the first cell in the first direction is a regular pattern; the center lines of two adjacent cell walls intersect and form an intersection center point, the distance between the intersection center points at both ends of any cell wall is L1, and the distance between the cutoff point between the second cell and the cell wall and the intersection center point is L2, where L2 / L1≤1 / 4.
8. The intaglio plate according to claim 7, wherein: The edge of the mesh wall has a mesh wall side surface, and the mesh wall side surface extends along the extension direction of the mesh wall; at the outer edge of the same first mesh cell, the planes where two adjacent mesh wall side surfaces are located intersect to form an intersection line, and the minimum distance c from the intersection center point to the intersection line, where L2>c.
9. The intaglio plate according to claim 1, wherein: The first cells are arranged at equal intervals, or the second cells are arranged at equal intervals along the extension direction of the mesh wall, or the first cells are arranged in a matrix.
10. A printing device, characterized in that: The invention comprises the intaglio plate according to any one of claims 1 to 9.