Coating die head capable of realizing coarse adjustment and fine adjustment

Abstract

The utility model provides a coating die head capable of realizing coarse adjustment and fine adjustment, which comprises an upper die head, a lower die head and an adjusting component, a gasket is arranged between the upper die head and the lower die head, and the upper die head, the lower die head and the gasket are enclosed to form a coating slit; a first groove is formed in the side, close to the coating lip, of the upper die head, the first groove divides the upper die head into a first base part and a first deformation part, a second groove is formed in the side, close to the coating lip, of the lower die head, and the second groove divides the lower die head into a second base part and a second deformation part. According to the coating die head capable of realizing the coarse adjustment and the fine adjustment, the coarse adjustment is realized through the micro linear servo electric cylinder, the fine adjustment is realized through the giant magnetostrictive core body or the piezoelectric actuator, and the coarse adjustment and the fine adjustment are combined, so that the flow adjustment precision and the flow adjustment speed are effectively improved, the coating quality is stable, and the coating uniformity is improved.

Description

Technical Field

[0001] This utility model relates to the field of coating technology, and more specifically, to a coating die head capable of coarse and fine adjustment. Background Technology

[0002] In the production process of lithium-ion batteries, a coating machine is used to uniformly, continuously, or intermittently coat a prepared viscous paste onto the battery substrate. Slit extrusion coating, as a precision wet coating technology, works by extruding the slurry under a certain pressure and flow rate through the slits of a coating die and transferring it onto the substrate. Compared to other coating methods, it has many advantages, such as fast coating speed, high precision, and uniform wet thickness. Existing coating dies consist of an upper die, a lower die, and a spacer sandwiched between them. The slurry is extruded from the coating slits onto the substrate. During the coating process, due to factors such as slurry temperature or viscosity, the coating thickness is uneven, requiring adjustment.

[0003] However, existing coating thickness adjustment components either have the required adjustment speed but low adjustment accuracy and large adjustment error when adjusting the coating lip, or they can meet the adjustment accuracy requirements but the adjustment speed is slow.

[0004] Therefore, how to design a coating die head that not only has high flow rate adjustment accuracy but also fast adjustment speed is a problem that those skilled in the art need to solve. Summary of the Invention

[0005] To address the aforementioned problems, the purpose of this utility model embodiment is to provide a coating die head capable of both coarse and fine adjustment.

[0006] This utility model embodiment provides a coating die head that can achieve coarse and fine adjustment, including an upper die head, a lower die head and an adjustment component. A shim is provided between the upper die head and the lower die head, and the upper die head, the lower die head and the shim surround to form a coating slit and a coating lip.

[0007] The upper die head has a first groove on the side near the coating lip, which divides the upper die head into a first base and a first deformation part. The lower die head has a second groove on the side near the coating lip, which divides the lower die head into a second base and a second deformation part.

[0008] There are multiple adjustment components. Multiple adjustment components are evenly arranged on the upper and lower mold heads respectively. Under the action of the adjustment components, the deformation of the first deformation part and the second deformation part can be controlled respectively, thereby adjusting the opening and closing degree of the coating lip.

[0009] Furthermore, the adjustment assembly includes a fixed frame, a miniature linear servo cylinder, a fine-tuning mechanism, and an adjustment rod. The fixed frame includes a placement part and a tightening part. One end of the miniature linear servo cylinder is placed in the placement part and then fixed to the fixed frame by the tightening part and screws. The output end of the miniature linear servo cylinder is fixedly connected to the upper end face of the fine-tuning mechanism. One end of the adjustment rod is detachably connected to the output end of the fine-tuning mechanism by threads. The other end of the adjustment rod is provided with a limit part, and the adjustment rod and the limit part form a "T" shape.

[0010] Furthermore, the fine-tuning mechanism includes an outer cylinder, the upper outer end face of which is fixedly connected to the output end of a miniature linear servo cylinder. An outer cylinder end cap is detachably mounted on the bottom end face of the outer cylinder. Inside the outer cylinder, a magnetostrictive assembly, a moving part, and spring A are sequentially arranged.

[0011] The moving part includes a force plate and a connecting rod. One end of the connecting rod is fixedly connected to the middle part of the force plate, and the other end of the connecting rod passes through the outer cylinder end cap and can move up and down along the through hole. Spring A is located between the force plate and the outer cylinder end cap and is sleeved on the outside of the connecting rod.

[0012] Furthermore, the super magnetostrictive assembly includes a magnetic shielding sleeve. The upper end face and peripheral side face of the magnetic shielding sleeve are connected to the inner top face and inner peripheral side face of the outer cylinder, respectively. A magnetic shielding sleeve end cap is detachably provided on the bottom end face of the magnetic shielding sleeve. Inside the magnetic shielding sleeve, from the middle to the outside, a super magnetostrictive core, a permanent magnet, a coil frame, and an excitation coil are arranged in sequence. The outer peripheral side of the super magnetostrictive core is connected to the hollow inner wall of the permanent magnet, and the outer peripheral side of the permanent magnet is connected to the hollow inner wall of the coil frame. The excitation coil is wound around the coil frame. One end of the super magnetostrictive core is in contact with the inner top face of the magnetic shielding sleeve, and the other end of the super magnetostrictive core passes through the magnetic shielding sleeve end cap and is in contact with the upper end face of the force-bearing plate.

[0013] Furthermore, the fine-tuning mechanism includes a piezoelectric actuator, the upper end face of which is fixedly connected to the inner top end face of the outer cylinder, and the other end of the piezoelectric actuator is provided with a movable end, which contacts the upper end face of the force plate.

[0014] Furthermore, the upper mold head is also provided with a first mounting hole, a first limiting groove, and a mounting groove. The first mounting hole is connected to the first limiting groove, and the first limiting groove is located below the first groove. The mounting groove is used to install the fixing bracket. One end of the adjusting rod connected to the limiting part passes through the first mounting hole and extends into the first limiting groove. The limiting part matches the first limiting groove. Opening the adjusting component can control the adjusting rod to reciprocate along the first mounting hole. Thus, under the action of the limiting part, the first deformable part deforms, thereby adjusting the opening and closing degree of the coating lip.

[0015] Furthermore, the lower die head is also provided with a second mounting hole and a second limiting groove. The second mounting hole and the second limiting groove are connected. The second limiting groove is located on the right side of the second groove. One end of the adjusting rod connected to the limiting part passes through the second mounting hole and extends into the second limiting groove. The limiting part matches the second limiting groove. The opening of the adjusting component can control the adjusting rod to reciprocate along the second mounting hole. Thus, under the action of the limiting part, the second deformable part deforms, thereby adjusting the opening degree of the coating lip.

[0016] Furthermore, one end of the adjusting rod is detachably connected to the connecting rod via a thread, and the adjusting rod and the limiting part are integrally formed or detachably connected.

[0017] Furthermore, the lower die head is also provided with a distribution cavity and a feeding channel. One end of the feeding channel is connected to the outside, and the other end is connected to the distribution cavity. The coating lip is connected to the distribution cavity through the coating slit. The liquid slurry enters the feeding channel from the outside, passes through the feeding channel and the distribution cavity in sequence, enters the coating slit, and finally flows out through the coating lip.

[0018] Furthermore, both the first mounting hole and the second mounting hole are rectangular holes with a size that matches the limiting part; there are multiple first mounting holes and multiple second mounting holes, and each first mounting hole and each second mounting hole is provided with an adjustment component.

[0019] The beneficial effects of this application are:

[0020] 1. This application achieves coarse adjustment through a miniature linear servo electric cylinder and fine adjustment through a super magnetostrictive core or a piezoelectric actuator. The combination of coarse and fine adjustment not only effectively improves the accuracy and speed of flow regulation, but also ensures stable coating quality and improves coating uniformity.

[0021] 2. The structure of this application is reasonably designed, and the fine-tuned structure is integrated and modular, which facilitates installation and replacement.

[0022] 3. The limiting part of this application has a chamfered design on the two edges away from the end face of the adjusting rod, or a chamfer is provided at the entrance of the first mounting hole or the second mounting hole (not shown in the figure), so that the limiting part and the adjusting rod play a guiding role when entering the first mounting hole or the second mounting hole, which facilitates alignment and entry. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1This is a schematic diagram of the planar structure of Embodiment 1 of the present invention;

[0025] Figure 2 This is a partial cross-sectional view of Embodiment 1 of the present invention;

[0026] Figure 3 This is Embodiment 1 of the present invention. Figure 2 A magnified view of a portion of point A;

[0027] Figure 4 This is a three-dimensional structural schematic diagram of the adjustment component according to Embodiment 1 of the present invention;

[0028] Figure 5 This is a three-dimensional structural diagram of the fixing frame according to Embodiment 1 of the present invention;

[0029] Figure 6 This is a partial cross-sectional view of the fine-tuning mechanism according to Embodiment 1 of the present invention;

[0030] Figure 7 This is a three-dimensional structural schematic diagram of the adjusting rod according to Embodiment 1 of the present invention;

[0031] Figure 8 This is a partial cross-sectional view of the fine-tuning mechanism in Embodiment 2 of the present invention.

[0032] Figure label:

[0033] 1. Upper die head; 11. First groove; 12. First mounting hole; 13. First limiting groove; 14. Mounting groove; 15. First base; 16. First deformation part; 2. Lower die head; 21. Second groove; 22. Second mounting hole; 23. Second limiting groove; 24. Second base; 25. Second deformation part; 3. Adjustment assembly; 31. Fixing bracket; 311. Placement part; 312. Tightening part; 32. Miniature linear servo electric cylinder; 33. Precision... Adjustment mechanism, 331, outer cylinder, 332, magnetic shielding sleeve, 333, excitation coil, 334, coil frame, 335, super magnetostrictive core, 336, permanent magnet, 337, moving part, 3371, force plate, 3372, connecting rod, 338, magnetic shielding sleeve end cap, 339, outer cylinder end cap, 33A, spring, 34, adjusting rod, 341, limiting part, 4, piezoelectric actuator, 41, moving end, 5, feeding channel, 6, distribution chamber. Detailed Implementation

[0034] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; 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 this utility model according to the specific circumstances.

[0037] Currently, existing coating thickness adjustment components either achieve the required adjustment speed but have low adjustment accuracy and large adjustment errors, or they achieve the required adjustment accuracy but have a slow adjustment speed.

[0038] Based on this, this application proposes a coating die head that can achieve both coarse and fine adjustment. Coarse adjustment is achieved by a micro linear servo electric cylinder, and fine adjustment is achieved by a super magnetostrictive core or piezoelectric actuator. The combination of coarse and fine adjustment not only effectively improves the accuracy and speed of flow regulation, but also stabilizes the coating quality and improves the uniformity of coating.

[0039] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and embodiments. Example

[0040] See Figure 1 The schematic diagram of the planar structure of this utility model is shown below. Figure 2 The partial sectional view shown is as follows. Figure 3 shown Figure 2A magnified view of part A. A coating die head capable of coarse and fine adjustment includes an upper die head 1, a lower die head 2, and an adjustment component 3. A shim is provided between the upper die head 1 and the lower die head 2. The upper die head 1, the lower die head 2, and the shim together form a coating slit and a coating lip.

[0041] The upper die head 1 has a first groove 11 on the side near the coating lip, which divides the upper die head 1 into a first base 15 and a first deformation part 16. The lower die head 2 has a second groove 21 on the side near the coating lip, which divides the lower die head 2 into a second base 24 and a second deformation part 25.

[0042] There are multiple adjustment components 3. Multiple adjustment components 3 are evenly arranged on the upper mold head 1 and the lower mold head 2 respectively. Under the action of the adjustment components 3, the first deformation part 16 and the second deformation part 25 can be deformed respectively, thereby adjusting the opening and closing degree of the coating lip.

[0043] See Figure 4 The diagram shows a three-dimensional structure of the adjustment component. Figure 5 The diagram shows a three-dimensional structure of the fixing frame. Figure 6 The partial cross-sectional view of the fine-tuning mechanism shown shows that the adjustment component 3 includes a fixed frame 31, a miniature linear servo cylinder 32, a fine-tuning mechanism 33, and an adjustment rod 34. The fixed frame 31 includes a placement part 311 and a cover part 312. One end of the miniature linear servo cylinder 32 is placed in the placement part 311 and then fixed to the fixed frame 31 by screws through the cover part 312. The output end of the miniature linear servo cylinder 32 is fixedly connected to the upper end face of the fine-tuning mechanism 33.

[0044] The fine-tuning mechanism 33 includes an outer cylinder 331. The upper outer end face of the outer cylinder 331 is fixedly connected to the output end of the miniature linear servo cylinder 32. The bottom end face of the outer cylinder 331 is detachably provided with an outer cylinder end cap 339. Inside the outer cylinder 331, there are a super magnetostrictive assembly, a moving part 337, and a spring 33A. The moving part 337 includes a force plate 3371 and a connecting rod 3372. One end of the connecting rod 3372 is fixedly connected to the middle part of the force plate 3371. The other end of the connecting rod 3372 passes through the outer cylinder end cap 339 and can move up and down along the through hole. The spring 33A is located between the force plate 3371 and the outer cylinder end cap 339 and is sleeved on the outside of the connecting rod 3372.

[0045] One end of the adjusting rod 34 is detachably connected to the connecting rod 3372 by a thread, and the other end of the adjusting rod 34 is provided with a limiting part 341. The adjusting rod 34 and the limiting part 341 are integrally formed or detachably connected, and the adjusting rod 34 and the limiting part 341 form a "T" shape.

[0046] The super magnetostrictive assembly includes a magnetic shielding sleeve 332. The upper end face and peripheral side face of the magnetic shielding sleeve 332 are connected to the inner top end face and inner peripheral side face of the outer cylinder 331, respectively. A magnetic shielding sleeve end cap 338 is detachably provided on the bottom end face of the magnetic shielding sleeve 332. Inside the magnetic shielding sleeve 332, from the middle to the outside, a super magnetostrictive core 335, a permanent magnet 336, a coil frame 334, and an excitation coil 333 are arranged in sequence. The outer peripheral side of the super magnetostrictive core 335 is connected to the hollow inner wall of the permanent magnet 336. The outer peripheral side of the permanent magnet 336 is connected to the hollow inner wall of the coil frame 334. The excitation coil 333 is wound around the coil frame 334. One end of the super magnetostrictive core 335 is in contact with the inner top end face of the magnetic shielding sleeve 332. The other end of the super magnetostrictive core 335 passes through the magnetic shielding sleeve end cap 338 and is in contact with the upper end face of the force plate 3371.

[0047] The upper mold head 1 is provided with a first mounting hole 12, a first limiting groove 13, and a mounting groove 14. The first mounting hole 12 is connected to the first limiting groove 13. The first limiting groove 13 is located below the first groove 11. The mounting groove 14 is used to install the fixing bracket 31. One end of the adjusting rod 34 connected to the limiting part 341 passes through the first mounting hole 12 and extends into the first limiting groove 13. The limiting part 341 matches the first limiting groove 13. Specifically, the first mounting hole 12 is a hole with a rectangular cross-section, and its size matches that of the limiting part 321. There are multiple first mounting holes 12, and each first mounting hole 12 is provided with an adjusting component 3.

[0048] When installing the T-shaped adjusting rod 34 and the limiting part 341, the adjusting rod 34 is inserted vertically into the first limiting groove 13 through the first mounting hole 12, while the limiting part 341 is inserted horizontally into the first mounting hole 12. Since the first mounting hole 12 is a rectangular hole, the horizontal limiting part 341 can reach the first limiting groove 13 through the first mounting hole 12. After the limiting part 341 reaches the first limiting groove 13, the adjusting rod 34 is rotated. After the adjusting rod 34 drives the limiting part 341 to rotate, the direction of the limiting part 341 in the first limiting groove 13 changes, causing the limiting part 34 to be stuck in the first limiting groove 13. Pulling the adjusting rod 34 outward cannot make the limiting part 341 be pulled out along the first limiting groove 13 and the first mounting hole 12. At this time, the opening of the adjustment component 3 can control the adjustment rod 34 to reciprocate along the first mounting hole 12, so that under the action of the limiting part 341, the first deformation part 16 deforms to adjust the opening and closing degree of the coating lip.

[0049] The lower die head 2 is also provided with a second mounting hole 22 and a second limiting groove 23. The second mounting hole 22 and the second limiting groove 23 are connected. The second limiting groove 23 is located on the right side of the second groove 21. One end of the adjusting rod 34 connected to the limiting part 341 passes through the second mounting hole 22 and extends into the second limiting groove 23. The limiting part 341 matches the second limiting groove 23. Specifically, the second mounting hole 22 is a hole with a rectangular cross-section, and its size matches that of the limiting part 321. There are multiple second mounting holes 22, and each second mounting hole 22 is provided with an adjusting component 3.

[0050] Similarly, when installing the T-shaped adjusting rod 34 and the limiting part 341, the adjusting rod 34 is inserted vertically into the second limiting groove 23 through the second mounting hole 22, while the limiting part 341 is inserted horizontally into the second mounting hole 22. Since the second mounting hole 22 is a rectangular hole, the horizontal limiting part 341 can reach the second limiting groove 23 through the second mounting hole 22. After the limiting part 341 reaches the second limiting groove 23, the adjusting rod 34 is rotated. After the adjusting rod 34 drives the limiting part 341 to rotate, the direction of the limiting part 341 in the second limiting groove 23 changes, causing the limiting part 341 to be stuck in the second limiting groove 23. Pulling the adjusting rod 34 outward cannot make the limiting part 341 be pulled out along the second limiting groove 23 and the second mounting hole 22. At this time, opening the adjustment component 3 can control the adjustment rod 34 to reciprocate along the second mounting hole 22, so that under the action of the limiting part 341, the second deformation part 25 deforms and adjusts the opening and closing degree of the coating lip.

[0051] The lower die head 2 is also provided with a distribution cavity 6 and a feeding channel 5. One end of the feeding channel 5 is connected to the outside, and the other end is connected to the distribution cavity 6. The coating lip is connected to the distribution cavity 6 through the coating slit. The liquid slurry enters the feeding channel 5 from the outside, passes through the feeding channel 5 and the distribution cavity 6 in sequence, enters the coating slit, and finally flows out through the coating lip.

[0052] In order to facilitate processing, the first limiting groove 13 and the second limiting groove 23 respectively penetrate the two end faces of the upper mold head 1 and the lower mold head 2.

[0053] See Figure 7 The schematic diagram of the three-dimensional structure of the adjusting rod shown shows that the two edges of the limiting part 341 away from the end face of the adjusting rod 34 have a chamfer design, or a chamfer is provided at the entrance of the first mounting hole 12 or the second mounting hole 22 (not shown in the figure). This allows the limiting part 341 and the adjusting rod 34 to act as a guide when entering the first mounting hole 12 or the second mounting hole 22, making it easier to align and enter.

[0054] Among them, the miniature linear servo electric cylinder 32 and the excitation coil 333 are electrically connected to the control module (not shown in the figure).

[0055] During operation, when it is necessary to reduce the opening degree of the coating die lip, the output end of the micro linear servo cylinder 32 is first controlled to move. The micro linear servo cylinder 32 drives the fine adjustment mechanism 33, the adjusting rod 34, and the limiting part 341 to synchronously push the deformation part to achieve coarse adjustment. After the change, the current output to the excitation coil 333 is increased, thereby increasing the magnitude of the magnetic field around the supermagnetostrictive core 335. The supermagnetostrictive core 335 will gradually extend and, through the connecting rod 3372 and the adjusting rod 34, push the limiting part 341 to continue driving the deformation part to achieve fine adjustment. When it is necessary to increase the opening degree of the coating die lip, First, the micro linear servo cylinder 32 is driven in reverse to control the micro linear servo cylinder 32 to drive the fine adjustment mechanism 33, the adjusting rod 34, and the limit part 341 to pull the deformation part synchronously to achieve coarse adjustment. Then, the current output to the excitation coil 333 is reduced, and the connecting rod 3372 will be reset under the action of the spring, driving the adjusting rod 34 and the push limit part 341 to continue to pull the deformation part, further increasing the opening and closing degree of the coating die lip to achieve fine adjustment. In use, fine adjustment can also be performed first to see if it meets the adjustment requirements. If it does, coarse adjustment is not required; if it does not, coarse adjustment and fine adjustment can be combined.

[0056] This combination of coarse and fine adjustment not only effectively improves the accuracy and speed of flow regulation, but also ensures stable coating quality and improves coating uniformity. Example

[0057] See Figure 8 The partial cross-sectional view of the fine-tuning mechanism shown shows that the fine-tuning mechanism 33 includes a piezoelectric actuator 4, which replaces the super magnetostrictive assembly. The upper end face of the piezoelectric actuator 4 is fixedly connected to the inner top end face of the outer cylinder 331. The other end of the piezoelectric actuator 4 is provided with a movable end 41, which contacts the upper end face of the force plate 3371.

[0058] Among them, the piezoelectric actuator 4 is electrically connected to the control module (not shown in the figure).

[0059] During operation, when it is necessary to reduce the opening degree of the coating die lip, the output end of the micro linear servo cylinder 32 is first controlled to move. The micro linear servo cylinder 32 drives the fine adjustment mechanism 33, the adjusting rod 34, and the limiting part 341 to synchronously push the deformation part to achieve coarse adjustment. After the change, the voltage output to the piezoelectric actuator 4 is increased. The piezoelectric actuator 4 extends and, through the connecting rod 3372 and the adjusting rod 34, pushes the limiting part 341 to continue driving the deformation part to achieve fine adjustment. When it is necessary to increase the opening degree of the coating die lip, the micro linear servo cylinder is first driven in reverse. 32. The micro linear servo cylinder 32 drives the fine adjustment mechanism 33, the adjusting rod 34, and the limiting part 341 to pull the deformation part synchronously to achieve coarse adjustment. Then, the voltage output to the piezoelectric actuator 4 is reduced, and the connecting rod 3372 will be reset under the action of the spring, driving the adjusting rod 34 and the pushing limiting part 341 to continue to pull the deformation part, further increasing the opening and closing degree of the coating die lip to achieve fine adjustment. In use, fine adjustment can be performed first to see if it meets the adjustment requirements. If it does, coarse adjustment is not required; if it does not, coarse adjustment and fine adjustment can be combined.

[0060] In summary, the embodiments of this application propose a coating die head capable of both coarse and fine adjustment. Coarse adjustment is achieved through a micro linear servo electric cylinder, and fine adjustment is achieved through a super magnetostrictive core or a piezoelectric actuator. The combination of coarse and fine adjustment not only effectively improves the accuracy and speed of flow regulation, but also ensures stable coating quality and improves coating uniformity.

[0061] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A coating die capable of coarse and fine adjustment, characterized by: It includes an upper die head (1), a lower die head (2) and an adjustment component (3). A gasket is provided between the upper die head (1) and the lower die head (2). The upper die head (1), the lower die head (2) and the gasket form a coating slit and a coating lip. The upper die head (1) has a first groove (11) on the side near the coating lip, which divides the upper die head (1) into a first base (15) and a first deformation part (16). The lower die head (2) has a second groove (21) on the side near the coating lip, which divides the lower die head (2) into a second base (24) and a second deformation part (25). There are multiple adjustment components (3). Multiple adjustment components (3) are evenly arranged on the upper mold head (1) and the lower mold head (2). Under the action of the adjustment components (3), the first deformation part (16) and the second deformation part (25) can be controlled to deform respectively, thereby adjusting the opening and closing degree of the coating lip.

2. The coating die capable of achieving coarse and fine adjustments of claim 1, wherein: The adjustment assembly (3) includes a fixed frame (31), a miniature linear servo cylinder (32), a fine adjustment mechanism (33), and an adjustment rod (34). The fixed frame (31) includes a placement part (311) and a cover part (312). One end of the miniature linear servo cylinder (32) is placed in the placement part (311) and then fixed to the fixed frame (31) by the cover part (312) and screws. The output end of the miniature linear servo cylinder (32) is fixedly connected to the upper end face of the fine adjustment mechanism (33). One end of the adjustment rod (34) is threadedly detachably connected to the output end of the fine adjustment mechanism (33). The other end of the adjustment rod (34) is provided with a limit part (341). The adjustment rod (34) and the limit part (341) form a "T" shape.

3. The coating die capable of achieving coarse and fine adjustment according to claim 2, characterized in that: The fine-tuning mechanism (33) includes an outer cylinder (331), the upper outer end face of which is fixedly connected to the output end of a miniature linear servo cylinder (32), and an outer cylinder end cap (339) is detachably provided on the bottom end face of the outer cylinder (331). Inside the outer cylinder (331) are arranged a super magnetostrictive assembly, a moving part (337), and a spring (33A). The movable part (337) includes a force plate (3371) and a connecting rod (3372). One end of the connecting rod (3372) is fixedly connected to the middle part of the force plate (3371). The other end of the connecting rod (3372) passes through the outer cylinder end cap (339) and can move up and down along the through hole. The spring (33A) is located between the force plate (3371) and the outer cylinder end cap (339) and is sleeved on the outside of the connecting rod (3372).

4. The coating die head capable of coarse and fine adjustment according to claim 3, characterized in that: The magnetostrictive assembly includes a magnetic shielding sleeve (332), the upper end face and the peripheral side face of the magnetic shielding sleeve (332) are connected to the inner top end face and the inner peripheral side face of the outer cylinder (331), respectively. A magnetic shielding sleeve end cap (338) is detachably provided on the bottom end face of the magnetic shielding sleeve (332). Inside the magnetic shielding sleeve (332), from the middle to the outside, are arranged a magnetostrictive core (335), a permanent magnet (336), a coil frame (334), and an excitation coil (333). The outer periphery of the shrinking core (335) is connected to the hollow inner wall of the permanent magnet (336), the outer periphery of the permanent magnet (336) is connected to the hollow inner wall of the coil frame (334), the excitation coil (333) is wound around the coil frame (334), one end of the super magnetostrictive core (335) is in contact with the inner top surface of the magnetic shielding sleeve (332), and the other end of the super magnetostrictive core (335) passes through the end cap (338) of the magnetic shielding sleeve and is in contact with the upper surface of the force plate (3371).

5. The coating die capable of achieving coarse and fine adjustment according to claim 2, characterized in that: The fine adjustment mechanism (33) includes a piezoelectric actuator (4), the upper end face of which is fixedly connected to the inner top end face of the outer cylinder (331), and the other end of the piezoelectric actuator (4) is provided with a movable end (41), which is in contact with the upper end face of the force plate (3371).

6. The coating die capable of achieving coarse and fine adjustments of claim 1, wherein: The upper mold head (1) is also provided with a first mounting hole (12), a first limiting groove (13), and a mounting groove (14). The first mounting hole (12) is connected to the first limiting groove (13). The first limiting groove (13) is located below the first groove (11). The mounting groove (14) is used to install the fixing bracket (31). One end of the adjusting rod (34) connected to the limiting part (341) passes through the first mounting hole (12) and extends into the first limiting groove (13). The limiting part (341) matches the first limiting groove (13). The opening of the adjusting component (3) can control the adjusting rod (34) to reciprocate along the first mounting hole (12). Thus, under the action of the limiting part (341), the first deformation part (16) deforms to adjust the opening degree of the coating lip.

7. The coating die capable of achieving coarse and fine adjustments of claim 1, wherein: The lower die head (2) is also provided with a second mounting hole (22) and a second limiting groove (23). The second mounting hole (22) and the second limiting groove (23) are connected. The second limiting groove (23) is located on the right side of the second groove (21). One end of the adjusting rod (34) connected to the limiting part (341) passes through the second mounting hole (22) and extends into the second limiting groove (23). The limiting part (341) matches the second limiting groove (23). The opening of the adjusting component (3) can control the adjusting rod (34) to reciprocate along the second mounting hole (22). Thus, under the action of the limiting part (341), the second deformation part (25) deforms to adjust the opening degree of the coating lip.

8. The coating die capable of achieving coarse and fine adjustment according to claim 3, characterized in that: One end of the adjusting rod (34) is threadedly detachably connected to the connecting rod (3372), and the adjusting rod (34) and the limiting part (341) are integrally formed or detachably connected.

9. The coating die capable of achieving coarse and fine adjustments of claim 1, wherein: The lower die head (2) is also provided with a distribution cavity (6) and a feeding channel (5). One end of the feeding channel (5) is connected to the outside, and the other end is connected to the distribution cavity (6). The coating lip is connected to the distribution cavity (6) through the coating slit. The liquid slurry enters the feeding channel (5) from the outside, passes through the feeding channel (5) and the distribution cavity (6) in sequence, enters the coating slit, and finally flows out through the coating lip.

10. The coating die capable of achieving coarse and fine adjustment according to claim 6 or 7, characterized in that: Both the first mounting hole (12) and the second mounting hole (22) are rectangular holes with a cross-section, and their size matches that of the limiting part (341). There are multiple first mounting holes (12) and second mounting holes (22), and each first mounting hole (12) and second mounting hole (22) is provided with an adjustment component (3).

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