Die head cleaning and protecting device and coating die head

Abstract

The utility model relates to the technical field of lithium battery coating equipment, and discloses a die head cleaning and protecting device and a coating die head, the die head cleaning and protecting device comprises a base, a driving piece and a telescopic frame, and the driving piece is used for driving the telescopic frame to stretch out and draw back along a first direction; the scraper is assembled on the telescopic frame, and the scraper is provided with an initial position close to the base and a working position far away from the base in the moving stroke; the protective sleeve is a flexible part, the protective sleeve is assembled on the telescopic frame, and the protective sleeve has an unfolded state when the scraper is located at the working position and a folded state when the scraper is located at the initial position. When a machine is shut down in the coating production process, the driving piece drives the telescopic frame to drive the scraper to move from the initial position to the working position, the scraper clears away residual materials of the lip opening, the protective sleeve can cover the lip opening of the extrusion die head to isolate air, and when coating production is started next time, the telescopic frame drives the scraper to move from the working position to the initial position, and the residual materials can be cleared away again. And meanwhile, the protective sleeve is automatically folded and withdrawn, and coating automation is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery coating equipment, in particular to a die head cleaning and protection device and a coating die head. Background Art

[0002] An important process in the production of power batteries is to coat the positive and negative electrode slurries on the surface of the current collector. The current mainstream method in the industry is slit extrusion coating, which works by applying a certain pressure to the slurry, allowing it to pass through the slit of the die head to form a stable interface at the lip and evenly coat the surface of the high-speed moving foil.

[0003] Currently, when the coating equipment is shut down, the slurry remaining at the lip of the extrusion die will solidify and harden at the lip due to contact with the outside air for a long time. When coating continues, these hardened slurry particles will affect the coating quality and even block the flow channel. This problem can only be solved by disassembling the die and re-cleaning it, which consumes a lot of time and manpower.

[0004] To prevent the slurry remaining on the lip of the extrusion die from hardening, the die is typically withdrawn from the coating roller during equipment shutdown. The lip is then manually sealed with tape to isolate the air and provide protection. When the machine is restarted, the tape is manually removed and the remaining slurry on the lip is wiped with a non-woven fabric. The extrusion die is then driven radially toward the coating roller, and the distance between the two rollers is adjusted before coating is performed. However, thin tape provides limited protection for the lip. Furthermore, applying and removing the tape and wiping the lip still require manual effort, which is time-consuming and difficult to control. Utility Model Content

[0005] The purpose of the utility model is to provide a die cleaning and protection device to solve the problems of limited protection and labor consumption when a thin tape is used to seal the lip of an extrusion die in the prior art; the utility model also provides a coating die using the die cleaning and protection device.

[0006] In order to achieve the above object, the utility model provides a die head cleaning and protection device, comprising:

[0007] a base having a first orientation;

[0008] a driving member, the driving member being assembled on the base;

[0009] a telescopic frame, the telescopic frame being in transmission connection with the driving member, the driving member being used to drive the telescopic frame to extend and retract along a first direction;

[0010] A scraper, the scraper being mounted on the telescopic frame. The scraper has an initial position close to the base and a working position away from the base during its movement. The telescopic frame is used to drive the scraper to reciprocate between the working position and the initial position.

[0011] The protective cover is a flexible member, and the protective cover is assembled on the telescopic frame. The protective cover has an unfolded state when the scraper is in the working position and a folded state when the scraper is in the initial position.

[0012] Preferably, the telescopic frame includes a first telescopic rod and a second telescopic rod, there are multiple first telescopic rods and multiple second telescopic rods, each first telescopic rod and each second telescopic rod are hinged to form a scissors-type telescopic structure, the protective sleeve is assembled at the hinge of the first telescopic rod and the second telescopic rod, the protective sleeve extends along the telescopic center line of the scissors-type telescopic structure, and the scraper is assembled on the center line of the scissors-type telescopic structure.

[0013] Preferably, the driving member includes an upper moving block, a lower moving block, a screw and a motor, the screw is connected to the motor in a transmission manner, the axial ends of the screw are provided with threads with opposite rotation directions, the upper moving block and the lower moving block have threaded holes with opposite rotation directions, the upper moving block and the lower moving block are threadedly assembled on the two ends of the screw, the first telescopic rod is hinged to the upper moving block, and the second telescopic rod is hinged to the lower moving block.

[0014] Preferably, the base includes a bottom plate, a top plate and a vertical plate, the top plate is arranged parallel to the bottom plate and spaced apart, the vertical plate is connected between the bottom plate and the top plate, the motor is assembled on the bottom plate, and the two ends of the screw rod are rotatably assembled with the top plate and the bottom plate respectively.

[0015] Preferably, the scraper comprises a blade body and an ear plate fixedly connected to the blade body, and the ear plate is fixedly assembled with the telescopic frame.

[0016] Preferably, the blade body includes a first blade and a second blade, the length of the first blade is smaller than the length of the second blade, and the first blade is located on a side of the second blade away from the telescopic frame.

[0017] Preferably, there are two groups of the first blades and two groups of the second blades, the two groups of the first blades are arranged symmetrically with the ear plate as the axis, and the two groups of the second blades are arranged symmetrically with the ear plate as the axis.

[0018] Preferably, the blade is a flexible rubber piece.

[0019] Preferably, it further comprises a waste liquid tank, which is arranged at the bottom of the scraper's moving stroke, and the notch of the waste liquid tank is arranged toward the scraper.

[0020] The utility model also provides a coating die, including an extrusion die, a coating roller, a die motion assembly and a die cleaning and protective device. The extrusion die is transmission-connected to the die motion assembly, the die motion assembly is used to drive the extrusion die toward or away from the coating roller, and the die cleaning and protective device is the die cleaning and protective device described in any of the above technical solutions.

[0021] Compared with the prior art, the die cleaning and protection device and the coating die of the embodiment of the utility model have the following beneficial effects: when the coating production process is stopped, the driving part can drive the telescopic frame to telescope along the length direction of the lip of the extrusion die, and the telescopic frame drives the scraper to move from the initial position to the working position, and the scraper can clean up the residual material on the lip of the extrusion die; when the scraper moves to the working position, the telescopic frame drives the protective cover to unfold, and the protective cover can cover the lip of the extrusion die to isolate the air, and automatically protect the lip of the extrusion die; when the coating production is started next time, the telescopic frame drives the scraper to move from the working position to the initial position, and the scraper can clean up the residual material on the lip of the extrusion die again, and at the same time, the protective cover is automatically folded back, replacing the manual cleaning and protection of the lip of the extrusion die, reducing manpower, and realizing coating automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural diagram of the die head cleaning and protection device of the present invention;

[0023] Figure 2 yes Figure 1 A front view of the die head cleaning guard;

[0024] Figure 3 yes Figure 2 Left side view of the die head cleaning guard;

[0025] Figure 4 yes Figure 2 A top view of the die head cleaning guard;

[0026] Figure 5 This is a structural schematic diagram of the die head cleaning and protection device of the present invention when the scraper is in the working position.

[0027] In the figure, 1. base, 11. bottom plate, 12. top plate, 13. vertical plate, 2. driving part, 21. upper moving block, 22. lower moving block, 23. screw, 24. motor, 3. telescopic frame, 31. first telescopic rod, 32. second telescopic rod, 4. scraper, 41. blade, 411. first blade, 412. second blade, 42. ear plate, 5. protective cover, 6. waste liquid tank, 7. extrusion die, 71. lip, 8. coating roller, 9. die moving assembly, X, first direction. DETAILED DESCRIPTION

[0028] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0029] A preferred embodiment of the die head cleaning and protection device of the present utility model is as follows Figures 1 to 5 As shown, the die cleaning and protection device includes a base 1, a driving member 2, a telescopic frame 3, a scraper 4, and a protective sleeve 5. The base 1 serves as the assembly foundation for the die cleaning and protection device. The base 1 is fixedly mounted on one side of the coating die, providing support and assembly space for the driving member 2, the telescopic frame 3, the scraper 4, and the protective sleeve 5. The base 1 has a first direction X. In this embodiment, the first direction X is the extending direction of the rear lip 71 of the die cleaning and protection device when mounted on the coating die.

[0030] The driving member 2 is assembled on the base 1 and is in transmission connection with the telescopic frame 3. The driving member 2 is a power structure for driving the telescopic frame 3 to extend and retract along the first direction X. The length of the telescopic frame 3 after being extended is greater than the length of the lip 71 of the extrusion die 7, so that the telescopic frame 3 can pass through the entire lip 71 of the extrusion die 7 along the first direction X when extending and retracting. When retracted, the telescopic frame 3 is completely located on one side of the lip 71 of the extrusion die 7 and does not interfere with the movement of the extrusion die 7.

[0031] The scraper 4 is mounted on the telescopic frame 3. The telescopic frame 3 drives the scraper 4 to move synchronously during its extension and retraction. The scraper 4 has an initial position and a working position during its travel. In the initial position, the scraper 4 is closer to the base 1, while in the working position, the scraper 4 is further away from the base 1. The telescopic frame 3 drives the scraper 4 to reciprocate between the working and initial positions. The scraper 4 can move along the telescopic frame 3 in a first direction X. After the base 1 is assembled, the scraper 4 abuts the lip 71 of the extrusion die 7. During this reciprocating motion, the scraper 4 removes any residual material from the lip 71 of the extrusion die 7.

[0032] The protective cover 5 is assembled on the telescopic frame 3. The protective cover 5 is a flexible member that allows it to deform. The telescopic frame 3 can cause the protective cover 5 to expand or fold during its telescopic movement. The protective cover 5 has an expanded state and a folded state. When the telescopic frame 3 drives the scraper 4 to the working position, the protective cover 5 is expanded and in the expanded state. When the scraper 4 is in the initial position, the protective cover 5 is folded and contracted and in the folded state. The protective cover 5 is located on the side of the telescopic frame 3 near the extrusion die 7. When the protective cover 5 is in the expanded state, the extrusion die 7 can move toward the protective cover 5 and fit against it, using the protective cover 5 to isolate the air and automatically protect the lip 71 of the extrusion die 7.

[0033] When the die cleaning and protection device is shut down during the coating production process, the driving part 2 can drive the telescopic frame 3 to extend and retract along the length direction of the lip 71 of the extrusion die 7, and the telescopic frame 3 drives the scraper 4 to move from the initial position to the working position. The scraper 4 can clean up the residual material on the lip 71 of the extrusion die 7. When the scraper 4 moves to the working position, the telescopic frame 3 drives the protective cover 5 to unfold. The protective cover 5 can cover the lip 71 of the extrusion die 7 to isolate the air and automatically protect the lip 71 of the extrusion die 7. When the coating production is started next time, the telescopic frame 3 drives the scraper 4 to move from the working position to the initial position. The scraper 4 can clean up the residual material on the lip 71 of the extrusion die 7 again, and the protective cover 5 is automatically folded back, replacing manual cleaning and protection of the lip 71 of the extrusion die 7, reducing manpower and realizing coating automation.

[0034] Preferably, the telescopic frame 3 includes a first telescopic rod 31 and a second telescopic rod 32, and there are multiple first telescopic rods 31 and second telescopic rods 32. Each first telescopic rod 31 and each second telescopic rod 32 are hinged to form a scissors-type telescopic structure. The protective cover 5 is assembled at the hinge between the first telescopic rod 31 and the second telescopic rod 32. The protective cover 5 extends along the telescopic center line of the scissors-type telescopic structure, and the scraper 4 is assembled on the center line of the scissors-type telescopic structure.

[0035] The telescopic frame 3 is a scissor-like telescopic structure formed by a plurality of first telescopic rods 31 and second telescopic rods 32 hinged together. This scissor-like structure offers excellent stability, small footprint, and low installation and cost, providing excellent protection for the lip 71 of the extrusion die 7. A protective cover 5 is mounted at the hinged joint between the first and second telescopic rods 31, 32, with the ends of the protective cover 5 mounted at different hinge points. This allows the protective cover 5 to expand or fold as the telescopic frame 3 extends or contracts. Both the protective cover 5 and the scraper 4 are located on the centerline of the scissor-like telescopic structure, and the centerline of the telescopic frame 3 coincides with the centerline of the lip 71, ensuring that both the protective cover 5 and the scraper 4 move along the first direction X, parallel to the centerline of the lip 71.

[0036] In other embodiments, the telescopic frame 3 may also be a mutually nested tube structure, the scraper 4 is assembled at the end of the tube structure, and the protective cover 5 is assembled on a different sleeve of the tube structure; the telescopic frame 3 may also be a corrugated tube formed by connecting multiple telescopic joints, the scraper 4 is assembled at one end of the corrugated tube, and the protective cover 5 is fixed on different telescopic joints of the corrugated tube.

[0037] Preferably, the driving member 2 includes an upper moving block 21, a lower moving block 22, a screw rod 23 and a motor 24. The screw rod 23 is transmission-connected to the motor 24. The axial ends of the screw rod 23 are provided with threads with opposite rotation directions. The upper moving block 21 and the lower moving block 22 have threaded holes with opposite rotation directions. The upper moving block 21 and the lower moving block 22 are threadedly assembled at both ends of the screw rod 23. The first telescopic rod 31 is hinged to the upper moving block 21, and the second telescopic rod 32 is hinged to the lower moving block 22.

[0038] The upper and lower moving blocks 21, 22 are threadedly assembled onto oppositely threaded threads at both ends of the screw rod 23 through threaded holes having opposite rotation directions. When the motor 24 drives the screw rod 23 to rotate, the upper and lower moving blocks 21, 22 can be synchronously moved closer or farther away, adjusting the angle between the first and second telescopic rods 31, 32, thereby driving the telescopic frame 3 to extend and retract. As the upper and lower moving blocks 21, 22 move, they can always keep the centerline of the telescopic frame 3 and the centerline of the lip 71 of the extrusion die 7 aligned, ensuring stable telescopic movement of the telescopic frame 3.

[0039] Preferably, the base 1 includes a bottom plate 11, a top plate 12 and a vertical plate 13. The top plate 12 is arranged parallel to the bottom plate 11 and spaced apart. The vertical plate 13 is connected between the bottom plate 11 and the top plate 12. The motor 24 is assembled on the bottom plate 11. The two ends of the screw rod 23 are respectively rotatably assembled with the top plate 12 and the bottom plate 11.

[0040] An assembly structure for the assembly screw 23 is formed between the top plate 12 and the bottom plate 11 of the base 1. The upper moving block 21 and the lower moving block 22 are both located between the top plate 12 and the bottom plate 11. The vertical plate 13 connects the top plate 12 and the bottom plate 11 as a whole to ensure the structural strength of the base 1.

[0041] Preferably, the scraper 4 includes a blade body 41 and an ear plate 42 fixedly connected to the blade body 41 , and the ear plate 42 is fixedly assembled with the telescopic frame 3 .

[0042] The scraper 4 is fixed to the telescopic frame 3 via lugs 42. In this embodiment, two lugs 42 are spaced apart, sandwiching the telescopic frame 3 between them. Bolts secure the lugs 42 and the telescopic frame 3, facilitating removal and replacement of the scraper 4. The blade 41 is fixed to the lugs 42. During movement, the blade 41 of the scraper 4 engages with the lip 71 of the extrusion die 7, scraping away any residual slurry from the lip 71.

[0043] Preferably, the blade body 41 includes a first blade 411 and a second blade 412 . The length of the first blade 411 is smaller than that of the second blade 412 . The first blade 411 is located on a side of the second blade 412 away from the telescopic frame 3 .

[0044] The length of the first blade 411 is smaller than that of the second blade 412 . When the scraper 4 moves along the first direction X, the first blade 411 and the second blade 412 successively wipe the lip 71 of the extrusion die 7 to ensure that the residual slurry at the lip 71 is completely removed.

[0045] Preferably, there are two groups of first blades 411 and two groups of second blades 412 . The two groups of first blades 411 are symmetrically arranged with the ear plate 42 as the axis, and the two groups of second blades 412 are symmetrically arranged with the ear plate 42 as the axis.

[0046] There are two groups of first blades 411 and second blades 412 and they are symmetrically arranged. When the first blades 411 and second blades 412 on one side are worn, the first blades 411 and second blades 412 on the other side can be switched for continued use, which reduces costs.

[0047] Preferably, the blade body 41 is a flexible rubber member.

[0048] The blade body 41 is made of flexible rubber material and can be deformed when squeezed by the lip 71 to avoid damaging the lip 71; the connection between the blade body 41 and the telescopic frame 3 is made of wear-resistant plastic material to reduce the generation of metal foreign matter.

[0049] Preferably, a waste liquid tank 6 is further included, which is arranged at the bottom of the moving stroke of the scraper 4 , and the notch of the waste liquid tank 6 is arranged toward the scraper 4 .

[0050] The waste liquid tank 6 is arranged at the bottom of the moving stroke of the scraper 4. The slurry wiped and cleaned by the scraper 4 flows to the waste tank at the bottom under the action of gravity to collect the waste.

[0051] The present utility model also provides a preferred embodiment of a coating die, comprising an extrusion die 7, a coating roller 8, a die motion assembly 9 and a die cleaning and protection device. The extrusion die 7 is transmission-connected to the die motion assembly 9. The die motion assembly 9 is used to drive the extrusion die 7 toward or away from the coating roller 8. The specific structure of the die cleaning and protection device is the same as that of the die cleaning and protection device of any of the above-mentioned technical solutions, and will not be repeated here.

[0052] The working process of the utility model is as follows: the die head cleaning protection device is assembled on one side of the extrusion die head 7, and the debugging is completed so that the extrusion die head 7 can freely approach the coating roller 8 under the drive of the die head movement component 9 when the telescopic frame 3 is extended and retracted, ensuring that there is no interference between the die head cleaning protection device and the extrusion die head 7 and the coating roller 8, and the scraper 4 is on the side of the lip 71 of the extrusion die head 7, and the waste liquid tank 6 is directly below the lip 71; when the coating die head receives the extrusion die head 7 knife retraction completion signal, the motor 24 drives the screw rod 23 to rotate, the upper movement block 21 and the lower movement block 22 are synchronously approached on the screw rod 23, and the angle between the first telescopic rod 31 and the second telescopic rod 32 is adjusted to drive the telescopic rod to extend, and the scraper 4 moves along with the telescopic frame 3 from the initial position. The lip 71 is moved from the initial position to the working position, during which the scraper 4 wipes off the residual slurry at the lip 71; after the telescopic frame 3 is fully unfolded, the protective cover 5 is in the unfolded state, and the die head movement component 9 drives the extrusion die head 7 to move toward the coating roller 8 to the sealing position, and the lip 71 fits the protective cover 5, so that the protective cover 5 is pressed onto the lip 71, isolating the lip 71 from the air and protecting the lip 71 at the same time; when the coating die is inflated again, the die head movement component 9 drives the extrusion die head 7 away from the coating roller 8 to a position fit with the scraper 4, and the telescopic frame 3 contracts to drive the scraper 4 to move from the working position to the initial position, and the scraper 4 wipes off the residual slurry at the lip 71 again. After wiping is completed, the extrusion die head 7 moves toward the coating roller 8 for coating operation.

[0053] In summary, the embodiments of the present invention provide a die cleaning and protection device and a coating die, which, when stopped during the coating production process, can drive the telescopic frame to extend and retract along the length direction of the lip of the extrusion die, and the telescopic frame drives the scraper to move from the initial position to the working position, and the scraper can clean up the residual material on the lip of the extrusion die. When the scraper moves to the working position, the telescopic frame drives the protective cover to unfold, and the protective cover can cover the lip of the extrusion die to isolate the air, and automatically protect the lip of the extrusion die. When the coating production is started next time, the telescopic frame drives the scraper to move from the working position to the initial position, and the scraper can clean up the residual material on the lip of the extrusion die again, and at the same time, the protective cover is automatically folded back, replacing manual cleaning and protection of the lip of the extrusion die, reducing manpower, and realizing coating automation.

[0054] 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 die head cleaning and protection device, characterized in that: include: A base (1), the base having a first direction (X); A driving member (2), wherein the driving member (2) is assembled on the base (1); a telescopic frame (3), the telescopic frame (3) being in transmission connection with the driving member (2), the driving member (2) being used to drive the telescopic frame (3) to telescope along a first direction (X); a scraper (4), the scraper (4) being mounted on the telescopic frame (3), the scraper (4) having an initial position close to the base (1) and a working position away from the base (1) during its movement, the telescopic frame (3) being used to drive the scraper (4) to move back and forth between the working position and the initial position; A protective cover (5) is a flexible member, and is mounted on the telescopic frame (3). The protective cover (5) has an unfolded state in which the scraper (4) is unfolded when the scraper (4) is in a working position, and a folded state in which the scraper (4) is folded and contracted when the scraper (4) is in an initial position.

2. The die head cleaning and protection device according to claim 1, characterized in that: The telescopic frame (3) comprises a first telescopic rod (31) and a second telescopic rod (32), wherein the first telescopic rod (31) and the second telescopic rod (32) are both provided in plurality, and each of the first telescopic rod (31) and the second telescopic rod (32) are hinged to form a scissor-type telescopic structure, and the protective cover (5) is mounted at the hinge between the first telescopic rod (31) and the second telescopic rod (32), and the protective cover (5) extends along the telescopic center line of the scissor-type telescopic structure, and the scraper (4) is mounted on the center line of the scissor-type telescopic structure.

3. The die head cleaning and protection device according to claim 2, characterized in that: The driving member (2) comprises an upper moving block (21), a lower moving block (22), a screw rod (23) and a motor (24); the screw rod (23) is connected to the motor (24) in a transmission manner; the axial ends of the screw rod (23) are provided with threads with opposite rotation directions; the upper moving block (21) and the lower moving block (22) have threaded holes with opposite rotation directions; the upper moving block (21) and the lower moving block (22) are threadedly assembled on the two ends of the screw rod (23); the first telescopic rod (31) is hinged to the upper moving block (21); and the second telescopic rod (32) is hinged to the lower moving block (22).

4. The die head cleaning and protection device according to claim 3, characterized in that: The base (1) comprises a bottom plate (11), a top plate (12) and a vertical plate (13); the top plate (12) and the bottom plate (11) are arranged in parallel and spaced apart; the vertical plate (13) is connected between the bottom plate (11) and the top plate (12); the motor (24) is assembled on the bottom plate (11); and the two ends of the screw rod (23) are rotatably assembled with the top plate (12) and the bottom plate (11) respectively.

5. The die head cleaning and protection device according to any one of claims 1 to 4, characterized in that: The scraper (4) comprises a blade body (41) and an ear plate (42) fixedly connected to the blade body (41), and the ear plate (42) is fixedly assembled with the telescopic frame (3).

6. The die head cleaning and protection device according to claim 5, characterized in that: The blade body (41) comprises a first blade (411) and a second blade (412), the length of the first blade (411) being smaller than the length of the second blade (412), and the first blade (411) being located on a side of the second blade (412) away from the telescopic frame (3).

7. The die head cleaning and protection device according to claim 6, characterized in that: There are two groups of the first blades (411) and the second blades (412). The two groups of the first blades (411) are arranged symmetrically with the ear plate (42), and the two groups of the second blades (412) are arranged symmetrically with the ear plate (42).

8. The die head cleaning and protection device according to claim 5, characterized in that: The blade (41) is a flexible rubber piece.

9. The die head cleaning and protection device according to any one of claims 1 to 4, characterized in that: It also includes a waste liquid tank (6), which is arranged at the bottom of the moving stroke of the scraper (4), and the notch of the waste liquid tank (6) is arranged toward the scraper (4).

10. A coating die head, characterized in that: The invention comprises an extrusion die (7), a coating roller (8), a die motion assembly (9) and a die cleaning and protection device, wherein the extrusion die (7) is transmission-connected to the die motion assembly (9), the die motion assembly (9) is used to drive the extrusion die (7) to approach or move away from the coating roller (8), and the die cleaning and protection device is the die cleaning and protection device according to any one of claims 1 to 9.

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