Self-discharging point coating plate roller

Abstract

The invention relates to the technical field of plate rollers, and provides a self-discharging point-coating plate roller which comprises a roller body, a roller cover, a roller cover, a roller cover and a roller cover, and is characterized in that the roller body is provided with an accommodating cavity; the multiple protruding points are evenly arranged on the outer wall of the roller body, through holes are formed in the protruding points, and the through holes communicate with the containing cavity. According to the technical scheme, the problem that in the prior art, printing roller coating needs to be limited by an anilox roller is solved.

Description

Technical Field

[0001] The invention relates to the technical field of plate rollers, and in particular to a self-discharging point-coating plate roller. Background Art

[0002] At present, the application of roller coating and spraying is relatively mature in the production process of diaphragms. The thickness of the diaphragms produced by the roller coating process is uniform and controllable, but its air permeability is relatively large, which will cause the internal resistance of the battery to increase and have an adverse effect on the battery cycle performance. Compared with roller coating, the spraying process has the advantages of low air permeability, saving raw materials and reducing costs. However, spraying has defects such as random distribution of spray points and difficulty in controlling the size and shape of the spray points.

[0003] As an emerging coating process, spot coating can not only control the morphology of each convex dot, but also accurately control the coverage of the diaphragm. The thickness of the diaphragm can also be adjusted with the help of parameters such as the plate roller, anilox roller, and vehicle speed, so as to better meet the various requirements of the battery for the diaphragm.

[0004] In the existing spot coating technology, the main method is to make the convex points of the plate roller contact with the anilox roller, and transfer the slurry to the convex points of the plate roller by virtue of the tension difference between the slurry and the material, and then transfer the slurry to the diaphragm by the plate roller to achieve coating. However, in this method, the amount of liquid on the plate roller depends largely on the anilox roller, which is subject to many restrictions of the anilox roller, resulting in a series of problems such as low liquid amount on the plate roller, deformation of convex points, adhesion of convex points, and low convex point height. In addition, during the production process, it is impossible to install a protective device between the plate roller and the anilox roller, which poses a certain safety risk. Summary of the invention

[0005] The present invention provides a self-discharging point coating roller, which solves the problem in the related art that the coating of the plate roller needs to be restricted by the anilox roller.

[0006] The technical solution of the present invention is as follows: A self-discharging point coating roller, comprising: A roller body having a receiving cavity, wherein the receiving cavity has an inlet and an outlet; There are a plurality of convex points which are evenly arranged on the outer wall of the roller body. The convex points are provided with through holes which are communicated with the accommodating cavity.

[0007] Optionally, there are a plurality of accommodating cavities, and the plurality of accommodating cavities are arranged at circumferential intervals.

[0008] Optionally, the roller body comprises: An inner cylinder, the accommodating cavity is located on the inner cylinder, and a plurality of the accommodating cavities are circumferentially spaced apart on the inner cylinder; The outer cylinder is rotatably sleeved on the outer wall of the inner cylinder, and the protrusion is arranged on the outer wall of the outer cylinder. After the outer cylinder rotates, the through hole is connected with the accommodating cavity or the connection is cancelled.

[0009] Optionally, the accommodating cavity has a plurality of glue outlets, the through hole is connected to the accommodating cavity through the glue outlets, and the through hole has a sealing groove at one end close to the glue outlet, and further includes: A sealing protrusion is arranged at the glue outlet, and after the outer cylinder rotates, the sealing protrusion enters or leaves the sealing groove.

[0010] Optionally, each of the accommodating chambers has two outlets, and further comprises: A scraper is slidably arranged in the accommodating cavity, the scraper abuts against the inner wall of the accommodating cavity, and is used to block one of the outlets after sliding.

[0011] Optionally, one of the outlets is located on the side wall of the accommodating chamber, and the other outlet is located at one end of the accommodating chamber, and the scraper is used to block the outlet located at one end of the accommodating chamber after sliding.

[0012] Optionally, also include: A baffle is rotatably disposed on the inner cylinder, and the baffle is used to cover the outlet on the side wall of the accommodating chamber.

[0013] Optionally, the accommodating cavity and the scraper are both circular.

[0014] Optionally, also include: There are two end covers, which are respectively arranged on both sides of the inner cylinder. The two end covers and the inner cylinder form two temporary storage spaces respectively. The inlet and the outlet are respectively connected to the two temporary storage spaces. The end covers are provided with a liquid inlet.

[0015] Optionally, the end cover and the outer cylinder are rotatably abutted.

[0016] The working principle and beneficial effects of the present invention are: In the present invention, efficient and accurate spot coating can be achieved only by the plate roller itself without relying on the anilox roller. When spot coating is required, a proper amount of glue liquid is first injected into the receiving cavity from the inlet. Then, the driving mechanism drives the plate roller to rotate. During the rotation of the plate roller, the glue liquid in the receiving cavity flows out from the through hole under the combined action of centrifugal force and internal pressure.

[0017] Since the convex points are evenly distributed on the outer wall of the roller, as the roller continues to rotate, when the convex points come into contact with the object to be coated, the glue is evenly coated on the surface of the object, thereby completing a precise coating operation.

[0018] Compared with the traditional spot coating method that relies on anilox rollers, the plate roller can achieve spot coating by itself, and there is no need to worry about the convex points not being able to adhere to the glue liquid after the glue output is too small, thus failing to achieve spot coating. The convex points produce glue by themselves, and the spot coating effect is better. By adjusting the rotation speed of the driving mechanism and the glue liquid pressure in the accommodating cavity, the speed and amount of the glue liquid flowing out of the through hole can be accurately controlled to achieve perfect satisfaction of different spot coating requirements. The anilox roller is abandoned, the equipment structure is simplified, the cost is reduced, the probability of failure is reduced, and the efficiency and stability of the spot coating operation are improved. In the present invention, the driving mechanism and the glue liquid pressure adjustment are both conventionally used in the prior art and will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0020] Figure 1 A cross-sectional view of an embodiment of the present invention; Figure 2 for Figure 1 Enlarged view of point B in the middle; Figure 3 for Figure 1 An axial cross-sectional view of an embodiment; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 is an axial cross-sectional view of another embodiment; Figure 6 is an axial cross-sectional view of other embodiments; Figure 7 for Figure 6 A cross-sectional view of an embodiment; In the figure: 1. roller body, 2. accommodating cavity, 3. inlet, 4. outlet, 5. convex point, 6. through hole, 7. inner cylinder, 8. outer cylinder, 9. glue outlet, 10. sealing protrusion, 11. scraper, 12. baffle, 13. end cover, 14. temporary storage space, 15. liquid inlet. DETAILED DESCRIPTION In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0021] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0022] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0024] Reference Figure 1 to Figure 7 , which is the first embodiment of the present invention, proposes a self-discharging point coating roller, including: a roller body 1 has a accommodating cavity 2, the accommodating cavity 2 has an inlet 3 and an outlet 4; there are a plurality of convex points 5, which are evenly arranged on the outer wall of the roller body 1, and the convex points 5 have through holes 6, which are connected to the accommodating cavity 2.

[0025] In this embodiment, efficient and accurate spot coating can be achieved only by the plate roller itself without relying on the anilox roller. When spot coating is required, firstly, an appropriate amount of glue liquid is injected into the receiving chamber 2 from the inlet 3. Then, the driving mechanism drives the plate roller to rotate. During the rotation of the plate roller, the glue liquid in the receiving chamber 2 flows out from the through hole 6 under the combined action of centrifugal force and internal pressure.

[0026] Since the convex points 5 are evenly distributed on the outer wall of the roller body 1, as the roller continues to rotate, when the convex points 5 come into contact with the object to be dotted (such as a diaphragm), the glue is evenly coated on the surface of the object, thereby completing a precise dot coating operation.

[0027] Compared with the traditional spot coating method that relies on the anilox roller, the plate roller can achieve spot coating by itself, and there is no need to worry about the convex point 5 not being able to adhere to the glue liquid after the glue output is too small, thus failing to achieve spot coating. The convex point 5 produces glue by itself, and the spot coating effect is better. By adjusting the rotation speed of the driving mechanism and the glue liquid pressure in the accommodating chamber 2, the speed and amount of the glue liquid flowing out of the through hole 6 can be accurately controlled to achieve perfect satisfaction of different spot coating requirements. The anilox roller is abandoned, the equipment structure is simplified, the cost is reduced, the probability of failure is reduced, and the efficiency and stability of the spot coating operation are improved. In this embodiment, the driving mechanism and the glue liquid pressure adjustment are both conventionally used in the prior art and are not described in detail here.

[0028] Reference Figure 1 to Figure 6 Optionally, there are several accommodating cavities 2, and the several accommodating cavities 2 are arranged at circumferential intervals.

[0029] In this embodiment, when the dot coating operation is performed, a more uniform and stable supply of glue can be achieved through a plurality of circumferentially spaced receiving cavities 2. Each receiving cavity 2 is connected to the inlet 3, ensuring that the pressure inside the plurality of receiving cavities 2 is the same. Because the plate roller is circular and the receiving cavities 2 are arranged circumferentially, a plurality of convex points 5 can be separately connected to different receiving cavities 2. Although different convex points 5 are connected to different receiving cavities 2, the pressure of the receiving cavities 2 is the same, so the glue output is the same, avoiding uneven glue output from different convex points 5.

[0030] When applying a larger area of ​​the diaphragm, multiple accommodating chambers 2 work together to ensure uniformity and consistency of the adhesive coating. In addition, this design can also reduce the liquid supply pressure of a single accommodating chamber 2 and reduce the requirements for the liquid supply system.

[0031] Optionally, the roller body 1 includes: an inner cylinder 7 containing cavity 2 located on the inner cylinder 7, and a plurality of containing cavities 2 are circumferentially spaced on the inner cylinder 7; an outer cylinder 8 is rotatably sleeved on the outer wall of the inner cylinder 7, and a protrusion 5 is arranged on the outer wall of the outer cylinder 8. After the outer cylinder 8 rotates, the through hole 6 is connected with the containing cavity 2 or the connection is cancelled.

[0032] After the dot coating is completed, a part of the glue will remain in the accommodating chamber 2 and the through hole 6, which needs to be cleaned in time. The general cleaning process is to directly pass clean water and clean it with clean water, but because the through holes 6 are all open, high pressure cannot be formed. In this embodiment, when it is necessary to clean the residual glue, first rotate the outer cylinder 8 so that the through hole 6 and the accommodating chamber 2 are not connected, and then pass clean water or cleaning liquid. As it is continuously passed, the pressure in the accommodating chamber 2 will increase (close the outlet 4 when passing clean water or cleaning liquid). When the pressure increases to a certain extent (it can be judged according to the user's experience or increase the pressure gauge to detect the pressure), then rotate the outer cylinder 8 so that the through hole 6 and the accommodating chamber 2 are connected, and the clean water or cleaning liquid is sprayed out from the through hole 6. The through hole 6 can be cleaned during the spraying process. When the through hole 6 is cleaned, the outlet 4 can be opened to discharge the excess clean water or cleaning liquid, and in the process of discharge, since the inlet 3 is under pressure, the residual glue in the accommodating chamber 2 can also be cleaned out.

[0033] Optionally, the accommodating chamber 2 has a plurality of glue outlets 9, and the through hole 6 is connected to the accommodating chamber 2 through the glue outlet 9. The through hole 6 has a sealing groove at one end close to the glue outlet 9, and also includes: a sealing protrusion 10 is arranged at the glue outlet 9, and after the outer cylinder 8 rotates, the sealing protrusion 10 enters or leaves the sealing groove.

[0034] In this embodiment, in order to prevent the glue or other liquid from leaking from the position where the through hole 6 and the accommodating chamber 2 are connected, the sealing protrusion 10 and the sealing groove cooperate to achieve sealing between the two. Preferably, the sealing protrusion 10 can be made of rubber material and has an interference fit with the sealing groove (a suitable size can be selected according to actual conditions). When rotation is required, the sealing groove and the sealing protrusion 10 can be separated and matched by turning the outer cylinder 8 with force.

[0035] Optionally, each accommodating chamber 2 has two outlets 4, and further includes: a scraper 11 slidably disposed in the accommodating chamber 2, the scraper 11 abuts against the inner wall of the accommodating chamber 2, and the scraper 11 is used to block one outlet 4 after sliding. One of the outlets 4 is located on the side wall of the accommodating chamber 2, and the other outlet 4 is located at one end of the accommodating chamber 2, and the scraper 11 is used to block the outlet 4 located at one end of the accommodating chamber 2 after sliding.

[0036] In this embodiment, in order to better clean the residual glue in the accommodating chamber 2, a scraper 11 is slidably arranged in the accommodating chamber 2. The specific process is: first clean the glue in the through hole 6, and after cleaning, introduce clean water or cleaning liquid from the outlet 4, and the scraper 11 slides under the push of the clean water or cleaning liquid, so that the residual glue on the side wall of the inner cavity can be scraped off. After the scraper 11 moves to the position of the inlet 3, introduce clean water or cleaning liquid from the inlet 3, push the scraper 11 to the original position, and under the action of the clean water or cleaning liquid, the glue on the scraper 11 will also fall off.

[0037] Moreover, in order to prevent the scraper 11 from blocking the outlet 4, the accommodating chamber 2 has two outlets 4. After the scraper 11 moves, the outlet 4 located on the axis (that is, the outlet 4 located at one end of the accommodating chamber 2) can be blocked, and the outlet 4 located on the side wall can still discharge liquid normally. When cleaning is required, clean water or cleaning liquid can be introduced into the two outlets 4 at the same time, or the outlet 4 located on the axis can be introduced into clean water or cleaning liquid.

[0038] Optionally, it also includes: a baffle 12 rotatably disposed on the inner cylinder 7 , and the baffle 12 is used to cover the outlet 4 on the side wall of the accommodating chamber 2 .

[0039] In this embodiment, in order to better drive the scraper 11 to slide, a baffle 12 is provided at the outlet 4 of the side wall of the accommodating chamber 2. Specifically, when the scraper 11 needs to slide to scrape off the glue, clean water or cleaning liquid is introduced from the outlet 4. Under the action of the clean water or cleaning liquid, the baffle 12 will block the outlet 4 on the side wall, so the clean water or cleaning liquid can only enter the accommodating chamber 2 from the outlet 4 on the axis, and can directly push the scraper 11 to move. When the clean water or cleaning liquid enters from the inlet 3, the scraper 11 will be pushed to the outlet 4 on the axis, and the baffle 12 will be pushed to rotate, and the clean water or cleaning liquid will be discharged from the outlet 4 on the side. Moreover, during normal use, the scraper 11 is located at the outlet 4 on the axis, and the glue pushes the baffle 12 to rotate, opening the outlet 4, and the glue is discharged from the outlet 4 on the side. Using different outlets 4 in the two working states can keep the scraper 11 in the accommodating chamber 2, avoid disassembly and installation of the scraper 11, and improve the cleaning speed.

[0040] Optionally, the accommodating cavity 2 and the scraper 11 are both circular.

[0041] In this embodiment, in order to prevent impurities from being retained in the accommodating chamber 2, the accommodating chamber 2 and the scraper 11 are both circular, and the glue or clean water can be accumulated at the bottom, and the scraper 11 can scrape it away when it moves.

[0042] Optionally, it also includes: two end covers 13, which are respectively arranged on both sides of the inner cylinder 7, the two end covers 13 and the inner cylinder 7 form two temporary storage spaces 14, the inlet 3 and the outlet 4 are respectively connected to the two temporary storage spaces 14, and the end cover 13 has a liquid inlet 15.

[0043] In this embodiment, by forming a temporary storage space 14 between the end cover 13 and the inner cylinder 7, a plurality of accommodating chambers 2 can be connected and the pressure in each accommodating chamber 2 can be ensured to be the same.

[0044] Optionally, the end cover 13 and the outer cylinder 8 are rotatably abutted.

[0045] In this embodiment, in order to prevent the outer cylinder 8 from axial movement, the outer cylinder 8 is limited by the end cover 13.

[0046] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A self-discharging point coating roller, characterized in that: include: The roller body (1) has a receiving cavity (2), wherein the receiving cavity (2) has an inlet (3) and an outlet (4); There are a plurality of convex points (5) uniformly arranged on the outer wall of the roller body (1); the convex points (5) have through holes (6), and the through holes (6) are connected to the accommodating cavity (2).

2. A self-discharging point coating roller according to claim 1, characterized in that: There are a plurality of the accommodating cavities (2), and the plurality of the accommodating cavities (2) are arranged at intervals on the circumference.

3. A self-discharging point coating roller according to claim 2, characterized in that: The roller body (1) comprises: An inner cylinder (7), the accommodating cavity (2) being located on the inner cylinder (7), and a plurality of the accommodating cavities (2) being arranged at circumferential intervals on the inner cylinder (7); The outer cylinder (8) is rotatably sleeved on the outer wall of the inner cylinder (7), and the protrusion (5) is arranged on the outer wall of the outer cylinder (8). After the outer cylinder (8) rotates, the through hole (6) is connected to the accommodating chamber (2) or is disconnected.

4. A self-discharging point coating roller according to claim 3, characterized in that: The accommodating cavity (2) has a plurality of glue outlets (9), the through hole (6) is connected to the accommodating cavity (2) via the glue outlets (9), and the through hole (6) has a sealing groove at one end close to the glue outlet (9), and further comprises: A sealing protrusion (10) is arranged at the glue outlet (9), and after the outer cylinder (8) rotates, the sealing protrusion (10) enters or leaves the sealing groove.

5. The self-discharging point coating roller according to claim 3, characterized in that: Each of the accommodating chambers (2) has two outlets (4) and further comprises: A scraper (11) is slidably disposed in the accommodating chamber (2), the scraper (11) abutting against an inner wall of the accommodating chamber (2), and the scraper (11) is used to block one of the outlets (4) after sliding.

6. A self-discharging point coating roller according to claim 5, characterized in that: One of the outlets (4) is located on the side wall of the accommodating chamber (2), and the other outlet (4) is located at one end of the accommodating chamber (2). The scraper (11) is used to block the outlet (4) located at one end of the accommodating chamber (2) after sliding.

7. A self-discharging point coating roller according to claim 5, characterized in that: Also includes: A baffle (12) is rotatably disposed on the inner cylinder (7), and the baffle (12) is used to shield the outlet (4) on the side wall of the accommodating chamber (2).

8. A self-discharging point coating roller according to claim 7, characterized in that: The accommodating cavity (2) and the scraper (11) are both circular.

9. The self-discharging point coating roller according to claim 7, characterized in that: Also includes: There are two end covers (13), which are respectively arranged on both sides of the inner cylinder (7); the two end covers (13) and the inner cylinder (7) respectively form two temporary storage spaces (14); the inlet (3) and the outlet (4) are respectively connected to the two temporary storage spaces (14); and the end covers (13) have a liquid inlet (15).

10. A self-discharging point coating roller according to claim 9, characterized in that: The end cover (13) and the outer cylinder (8) are in rotational abutment with each other.

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