Blade coating machine with spraying function and blade coating system

Abstract

The utility model relates to the technical field of pole piece production, and particularly discloses a blade coating machine with a spraying function and a blade coating system. The blade coater with the spraying function comprises a supporting piece, a sprayer and a scraper, the scraper and the sprayer are arranged on the supporting piece; the scraper is used for scraping a coating on the material belt; the sprayer is located on the upstream or the downstream of the scraper in the moving direction of the scraper relative to the material belt. According to the scheme, the sprayer and the scraper are installed at the adjacent positions on the same path, the sprayer can soak the scraping area in advance or conduct coating on the area scraped by the scraper, the problem that a coating falls off is solved, and independent coating equipment or an independent coating process does not need to be additionally arranged; the production efficiency can be improved, and the equipment cost is saved.

Description

Technical Field

[0001] This application relates to the field of electrode production technology, and in particular to a coating machine and coating system with spraying function. Background Technology

[0002] In electrode production, the coating process involves uniformly applying a slurry to the current collector and then drying it to remove the organic solvents. The coating effect impacts multiple performance indicators of the battery, including capacity, internal resistance, cycle durability, and overall safety. Therefore, after coating, it is necessary to test its uniformity, thickness, and dimensions to avoid defects in the coating layer.

[0003] Among the aforementioned defects, the gaps or grooves reserved in the electrode coating to meet the needs of subsequent manufacturing processes are often created after coating. After coating, the electrode is usually a dry roll material. If grooves or gaps are then created, the dried active layer may not peel off easily or may not peel off according to the intended area.

[0004] To avoid the aforementioned defects or as required by the process, a doctor blade is used to locally scrape off the coating surface after coating. If coating peels off during the scraping process, it is necessary to apply other materials to the corresponding areas. This requires an additional coating process and equipment, increasing costs. Utility Model Content

[0005] In view of this, the purpose of this application is to provide a scraper coating machine and scraper coating system with spraying function, so as to solve the problem that the scraper coating process requires separate coating equipment and process, resulting in high cost.

[0006] To achieve the above-mentioned technical objectives, the first aspect of this application provides a scraper with spraying function, comprising: a support member, a sprayer, and a scraper.

[0007] The scraper and the sprayer are disposed on the support member;

[0008] The scraper is used to scrape off the coating on the material strip;

[0009] The scraper and the sprayer are arranged adjacent to each other along a preset track on the material belt.

[0010] Furthermore, the sprayer and the scraper are mounted on the support with their respective axes aligned.

[0011] Furthermore, it also includes spray-painted protective covers;

[0012] The spray shield is positioned adjacent to the nozzle of the sprayer;

[0013] The spraying shield is provided with a through hole, which is used for the paint sprayed by the sprayer to pass through so that the paint is sprayed on a preset area.

[0014] Furthermore, the central axis of the through hole coincides with the central axis of the nozzle of the sprayer.

[0015] Furthermore, the through hole is elongated, and the axis of the through hole is aligned with the axis of the scraper.

[0016] Furthermore, the support member is provided with protrusions;

[0017] The spray coating shield is disposed on the protrusion so that the spray coating shield and the scraper are arranged adjacent to each other along a preset trajectory on the material strip.

[0018] Furthermore, the support member is provided with a first slide rail and a first driving member;

[0019] The sprayer is slidably mounted on the first slide rail;

[0020] The output end of the first drive unit is connected to the sprayer, which is used to drive the sprayer to slide along the first slide rail to move closer to or away from the material belt.

[0021] Furthermore, the support member is provided with a second slide rail and a second driving member;

[0022] The scraper is slidably mounted on the second slide rail;

[0023] The output end of the second drive unit is connected to the scraper, which drives the scraper to slide along the second slide rail to move closer to or away from the material strip.

[0024] Furthermore, it also includes dust removal components;

[0025] The dust removal assembly includes a brush that abuts against the scraper and a suction port facing the scraper.

[0026] A second aspect of this application provides a coating system, comprising: a drying component and a coating machine as described in any of the preceding claims;

[0027] The drying assembly is located between the coating machine and the winding mechanism.

[0028] As can be seen from the above technical solutions, this application provides a scraper with spraying function and a scraper system; wherein, the scraper with spraying function includes: a support member, a sprayer and a scraper blade; the scraper blade and the sprayer are disposed on the support member; the scraper blade is used to scrape off the coating on the material strip; the scraper blade and the sprayer are arranged adjacent to each other along a preset trajectory on the material strip.

[0029] In this solution, the sprayer is located upstream or downstream of the scraper relative to the material conveyor belt's travel direction. Taking upstream as an example, the sprayer can pre-wet the area to be scraped by the scraper. By installing the sprayer and scraper at adjacent positions on the same path, the area to be scraped can be pre-wetted, effectively preventing the wetted area from drying too quickly. The coating is scraped off by utilizing the time difference in the drying process of the wetting liquid, preventing the coating from detaching beyond the predetermined area. This allows for rapid coating removal, thus solving the problem of coating peeling without the need for additional separate coating equipment or processes, thereby improving production efficiency and saving equipment costs. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 A perspective view of a scraper with spraying function provided for an embodiment of this application;

[0032] Figure 2 A side cross-sectional view of a scraper with spraying function provided for an embodiment of this application;

[0033] Figure 3 A schematic diagram of a sprayer for a scraper coating machine with spraying function provided for an embodiment of this application;

[0034] Figure 4 Another perspective view of a scraper with spraying function provided for an embodiment of this application;

[0035] In the figure: 10, support component; 11, protrusion; 12, first slide rail; 13, first drive component; 14, second slide rail; 15, second drive component; 20, sprayer; 21, spray cover; 22, through hole; 30, scraper; 40, dust removal assembly; 41, brush; 42, suction port. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments in this application specification, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection claimed in this application.

[0037] In the description of the embodiments of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application 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. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a replaceable 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0039] Please see Figures 1 to 4 In a first aspect of this application, a scraper coating machine with spraying function is provided, comprising: a support member 10, a sprayer 20, and a scraper 30. The scraper 30 and the sprayer 20 are disposed on the support member 10.

[0040] The scraper 30 is used to scrape off the coating on the material strip; along the moving direction of the scraper 30 relative to the material strip, the sprayer 20 is located upstream or downstream of the scraper 30, that is, the scraper 30 and the sprayer 20 are arranged adjacent to each other along a preset track on the material strip.

[0041] In this embodiment, the scraper 30 is used to move relative to the material strip to locally scrape off the coating on the strip. In practical applications, the relative movement can be such that the material strip is stationary while the scraper 30 moves along the length of the material strip, or the scraper 30 is stationary while the material strip moves. Regardless of the movement method, the scraper 30 and the material strip will experience relative movement.

[0042] In this embodiment, the direction of movement of the scraper 30 relative to the material strip can be as follows: Figure 2 As shown in the X-axis direction; with the scraper 30 fixed, the length direction of the material strip is the X-axis direction, and the material strip moves in the negative direction of the X-axis.

[0043] Taking the sprayer 20 located downstream of the scraper 30 as an example, the sprayer 20 can coat the area scraped by the scraper 30, thereby timely recoating the peeling coating, without the need for separate equipment and separate coating process, saving process flow to improve production efficiency and save equipment costs.

[0044] Taking the sprayer 20 located upstream of the scraper 30 as an example, the sprayer 20 can pre-wet the area that the scraper 30 is about to scrape, effectively preventing the wetted area from drying quickly. By utilizing the time difference in the drying process of the wetting liquid to scrape off the coating, it can prevent the coating from detaching beyond the predetermined area, allowing the scraper to quickly scrape off the coating and avoid the problem of coating peeling off.

[0045] The sprayer 20 is equipped with a drive unit that controls its start and stop; when the drive unit is turned on, the sprayer 20 can spray paint through the nozzle; when the drive unit is turned off, the sprayer 20 stops spraying.

[0046] In one implementation, the sprayer 20 can be kept open to coat the entire area before and after scraping by the scraper 30.

[0047] As one implementation method, taking the sprayer 20 located downstream of the scraper 30 as an example, the sprayer 20 can be used in conjunction with a vision inspection system or other detection mechanism to achieve automated start-stop control. Specifically, the scraper can be equipped with a vision inspection system to detect whether the coating has peeled off after scraping. If so, the sprayer is started to spray. The method by which the vision inspection system detects whether the coating has peeled off after the scraper passes is existing technology; for example, it can be identified through color difference comparison, etc., which will not be elaborated in this embodiment.

[0048] Besides the need for a sprayer due to coating peeling, the inventors have discovered that after partially scraping away the dried coating with a scraper, edge defects such as jagged edges or over-scraping can occur, which also affect the electrode performance. Therefore, the scraper with spraying function provided in this embodiment, in addition to starting when coating peeling is detected, can also remain constantly open according to process requirements. This allows for coating the edges of the scraped coating or pre-wetting the area to be scraped by the scraper 30, avoiding jagged edges or over-scraping after the scraper removes the coating.

[0049] In one embodiment, the sprayer 20 is aligned with the center of the scraper 30. Specifically, the central axis of the nozzle of the sprayer 20 is aligned with the central axis of the scraper 30, so that the sprayer 20 can achieve a uniform spraying effect on the area scraped by the scraper.

[0050] In this embodiment, the support member 10 can be plate-shaped. The line connecting the central axis of the nozzle of the sprayer 20 and the central axis of the scraper 30 is parallel to the normal of the support member 10.

[0051] In one embodiment, a spray shield 21 is also included; the spray shield 21 is located in front of the nozzle spraying direction of the sprayer 20, that is, the spray shield 21 is adjacent to the nozzle of the sprayer 20; a through hole 22 is provided in the spray shield 21, the through hole 22 is used for the paint sprayed by the sprayer 20 to pass through so that the paint is sprayed on a preset area.

[0052] The spray cover 21 can collect the paint, ensuring that the paint sprayed by the sprayer 20 is concentrated in the preset area, thereby ensuring the spraying effect.

[0053] Optionally, the central axis of the through hole 22 coincides with the central axis of the nozzle of the sprayer 20, that is, the central axis of the through hole 22 is aligned with the center of the scraper 30, so that the through hole 22 is located directly behind the scraper 30 along the X-axis direction.

[0054] In this embodiment, the paint sprayed from the nozzle of the sprayer 20 passes through the spraying shield 21 along the central axis of the through hole 22 and lands on the area scraped by the scraper 30, thereby ensuring that the paint accurately covers the scraped area, effectively avoiding coating edge defects and improving the overall performance of the electrode.

[0055] In one embodiment, the through hole 22 is elongated, and its length direction is parallel to the spraying direction of the sprayer 20. Specifically, the axis of the through hole 22 is aligned with the axis of the scraper 30.

[0056] The elongated through-holes 22 help to collect the paint and prevent it from spreading to non-preset areas, thus ensuring the spraying effect.

[0057] In one embodiment, the support member 10 is provided with a protrusion 11; the spraying cover 21 is provided on the protrusion 11 so that the spraying cover 21 and the scraper 30 are arranged adjacent to each other along a preset track on the material strip.

[0058] Specifically, the protrusion 11 protrudes along the normal direction of the support member 10 so that the spray cover 21 and the scraper 30 can be positioned back and forth along the X-axis direction.

[0059] In one embodiment, the support member 10 is provided with a first slide rail 12 and a first drive member 13; the sprayer 20 is slidably disposed on the first slide rail 12; the output end of the first drive member 13 is connected to the sprayer 20 and is used to drive the sprayer 20 to slide along the first slide rail 12 to approach or move away from the material belt.

[0060] In another embodiment, the support member 10 is provided with a second slide rail 14 and a second drive member 15; the scraper 30 is slidably disposed on the second slide rail 14; the output end of the second drive member 15 is connected to the scraper 30, and is used to drive the scraper 30 to slide along the second slide rail 14 to approach or move away from the material belt.

[0061] The sprayer 20 can slide via the first slide rail 12; the scraper 30 can slide via the second slide rail 14, thereby adjusting the distance between the sprayer 20 and the scraper 30 and the material belt, and thus adjusting the spraying and scraping effects.

[0062] In one embodiment, a dust removal assembly 40 is also included; the dust removal assembly 40 includes a brush 41 that abuts against the scraper 30 and a suction port 42 facing the scraper 30.

[0063] The brush 41 is used to remove residue from the surface of the scraper 30, and the suction port 42 can suck in the dust generated during the scraping process and the cleaning process of the brush 41.

[0064] In one implementation, the suction port 42 can be configured to surround the outer periphery of the scraper 30 to ensure effective suction. The brush 41 can be connected to a driving component such as a cylinder to move along the length of the scraper 30 and clean the surface of the scraper 30.

[0065] A second aspect of this application provides a coating system, comprising: a drying component and a coating machine according to any one of the above; the drying component is disposed between the coating machine and a winding mechanism.

[0066] The drying unit is used to dry the sprayed material to prevent the material tape from sticking together after winding.

[0067] In this embodiment, the drying process performed by the drying mechanism is set as the next process after the coating machine.

[0068] The above are merely preferred embodiments of this application and are not intended to limit the present invention. Although the present application has been described in detail with reference to examples, those skilled in the art can still modify the technical solutions described in the foregoing examples or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A scraper coating machine with spraying function, characterized in that, include: Support (10), sprayer (20) and scraper (30); The scraper (30) and the sprayer (20) are disposed on the support (10); The scraper (30) is used to scrape off the coating on the material strip; The scraper (30) and the sprayer (20) are arranged adjacent to each other along a preset trajectory on the material strip.

2. The coating machine with spraying function according to claim 1, characterized in that, The sprayer (20) and the scraper (30) are mounted on the support (10) with their respective axes aligned.

3. The coating machine with spraying function according to claim 1, characterized in that, It also includes a spray-coated protective cover (21); The spray shield (21) is located adjacent to the nozzle of the sprayer (20); The spraying cover (21) is provided with a through hole (22), which is used for the paint sprayed by the sprayer (20) to pass through so that the paint is sprayed on a preset area.

4. The coating machine with spraying function according to claim 3, characterized in that, The central axis of the through hole (22) coincides with the central axis of the nozzle of the sprayer (20).

5. The coating machine with spraying function according to claim 3, characterized in that, The through hole (22) is elongated, and the axis of the through hole (22) is aligned with the axis of the scraper (30).

6. The coating machine with spraying function according to claim 3, characterized in that, The support member (10) is provided with a protrusion (11); The spraying shield (21) is disposed on the protrusion (11) so that the spraying shield (21) and the scraper (30) are disposed adjacent to each other along a preset trajectory on the material strip.

7. The coating machine with spraying function according to claim 1, characterized in that, The support member (10) is provided with a first slide rail (12) and a first drive member (13); The sprayer (20) is slidably mounted on the first slide rail (12). The output end of the first drive unit (13) is connected to the sprayer (20) to drive the sprayer (20) to slide along the first slide rail (12) to move closer to or away from the material strip.

8. The coating machine with spraying function according to claim 1, characterized in that, The support member (10) is provided with a second slide rail (14) and a second drive member (15). The scraper (30) is slidably disposed on the second slide rail (14); The output end of the second drive unit (15) is connected to the scraper (30) to drive the scraper (30) to slide along the second slide rail (14) to move closer to or away from the material belt.

9. The coating machine with spraying function according to claim 1, characterized in that, It also includes a dust removal component (40); The dust removal assembly (40) includes a brush (41) that abuts against the scraper (30) and a suction port (42) facing the scraper (30).

10. A coating system, characterized in that, include: The drying assembly and the scraper as described in any one of claims 1 to 9; The drying assembly is located between the coating machine and the winding mechanism.

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