Trial coating device of coating die head

Abstract

The invention belongs to the technical field of coating, and discloses a coating die head trial coating device, which comprises a bearing frame and a coating die head main body, the coating die head main body is arranged at the side part of the bearing frame, and the coating die head trial coating device also comprises a trial coating assembly, and the trial coating assembly is arranged on the bearing frame. Slurry is uniformly sprayed to a plurality of areas outside a coating base material through the coating die head body, actual coating production steps are simulated through rotation of the coating base material, the slurry is uniformly attached to the outside of the coating base material, and the output amount of the slurry in the area corresponding to the discharge port of the coating die head body can be judged by observing the volume of the collected slurry. And if the slurry capacity of one area is lower than the slurry capacity of the other areas, the discharging amount of the discharging port of the corresponding area of the coating die head main body is lower than the discharging flow of the other areas, so that the coating die head main body can be maintained and debugged, and the accuracy of trial coating detection data of the coating die head main body is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of coating, and specifically relates to a coating die trial coating device. Background Art

[0002] Coating is a process of uniformly covering a substrate (such as a film, metal foil, paper, etc.) with a liquid, paste or molten material by mechanical or chemical means. Its core objective is to form a thin layer with specific functions to meet the requirements of conductivity, protection, optics, adhesion, etc.; the trial coating of the coating die is a key link in the coating process, and its main purpose is to verify and optimize various parameters of the coating process through small-scale or experimental operations to ensure the quality and efficiency of subsequent large-scale production. At present, with long-term operation, the coating die is prone to uneven material discharge, which will affect the production quality of the product. However, most of the existing coating die detections rely on manual visual inspection or off-line thickness gauges, which cannot provide real-time feedback of thickness data and rely on subjective human judgment, resulting in poor consistency. Moreover, high-precision sensors are costly and difficult to integrate into existing production lines. Therefore, a coating die trial coating device is proposed. Summary of the Invention

[0003] To solve the problems raised in the above background art, the present invention provides a coating die trial coating device, which solves the problems that most of the existing coating die detections rely on manual visual inspection or off-line thickness gauges, cannot provide real-time feedback of thickness data, and rely on subjective human judgment, resulting in poor consistency.

[0004] To achieve the above object, the present invention provides the following technical solution: A coating die trial coating device, including a receiving frame and a coating die body, the coating die body is arranged on the side of the receiving frame, and further includes: A trial coating component, the trial coating component is arranged on the receiving frame; A collection component, the collection component is installed on the side of the receiving frame and is located between the coating die body and the receiving frame; A transmission component, the transmission component is installed on the top of the receiving frame, and a detection component is fixedly installed outside the transmission component; Among them, the trial coating component includes a first transmission roller and a second transmission roller arranged on the receiving frame. A coating substrate is sleeved outside the first transmission roller and the second transmission roller, and separation rings are fixedly installed at equal intervals outside the coating substrate; The separation rings divide the outside of the coating substrate into multiple coating areas; The collection component includes a docking plate fixedly installed on the side of the receiving frame. Separation plates are fixedly installed at equal intervals inside the docking plate. The separation plates correspond to the separation rings, and the upper and lower ends of the separation plates are clamped outside the separation rings; The partition plate divides the discharge port of the coating die body into multiple regions, and the multiple coating regions of the coating substrate are consistent with the multiple regions of the discharge port of the coating die body.

[0005] Preferably, a driving motor for driving the first driving roller and the coating substrate to rotate is arranged outside the receiving frame; The coating substrate is made of a metal thin sheet material, and the slurry ejected from the coating die body is guided by the partition plate and evenly sprayed onto the surface of the rotating first driving roller, and multiple coating regions are formed on the coating substrate.

[0006] Preferably, the collecting assembly further includes a collecting piece fixedly installed between two adjacent partition plates through a connecting frame, and the top end of the collecting piece is in contact with the coating substrate; The collecting pieces are sequentially arranged in multiple regions outside the coating substrate, and both sides of the collecting piece are in contact with the opposite sides of two adjacent partition rings.

[0007] Preferably, a detachable storage tank is arranged at the bottom of the collecting piece, and scale lines are arranged on the storage tank for observing the capacity.

[0008] Preferably, the transmission assembly includes a first support frame fixedly installed on the top of the receiving frame, a transmission rod is movably installed on the first support frame through a lifting structure, docking pieces are fixedly installed at equal intervals outside the transmission rod, and detection needles are arranged in an annular array outside the docking pieces; A vertical rectangular through groove is formed in the middle of the first support frame, and the transmission rod passes through the vertical rectangular through groove.

[0009] Preferably, second transmission gears are fixedly installed at both ends of the transmission rod, first transmission gears are fixedly installed at both ends of the first driving roller, and when the transmission rod is located at the lower end of the vertical rectangular through groove, the second transmission gears are meshed with the first transmission gears; The docking pieces correspond to multiple coating regions of the coating substrate, and when the detection needles are perpendicular to the coating substrate, the detection needles do not contact the coating substrate.

[0010] Preferably, the detection assembly includes a second support frame fixedly installed between the two first support frames, and a high-definition camera is fixedly installed on the side of the second support frame.

[0011] Preferably, a detachable sponge cleaning piece is installed on the other side of the second support frame, and a cleaning gap corresponding to the detection needle is formed at one end of the sponge cleaning piece.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention evenly sprays the slurry onto multiple areas outside the coating substrate through the coating die body, and simulates the actual coating production steps by rotating the coating substrate, so that the slurry is evenly attached to the outside of the coating substrate. Then, by separately collecting and comparing the slurries in multiple areas outside the coating substrate, observing the volume of the collected slurry can determine the output of the slurry in the area corresponding to the discharge port of the coating die body. If the volume of the slurry in one area is lower than that in other areas, it means that the discharge volume of the discharge port in the corresponding area of the coating die body is lower than the flow rate of the discharge in other areas. Furthermore, the coating die body can be repaired and debugged to ensure the accuracy of the test coating detection data of the coating die body; The present invention sprays the slurry onto the rotating coating substrate through the coating die body. During the coating process, the slurry is guided by the partition plate, so that the slurry gathers in each coating area on the coating substrate, thereby increasing the coating thickness of each area of the coating substrate. After the test coating of the coating substrate is completed, the lifting structure rotates in the reverse direction to engage the second transmission gear with the first transmission gear. By rotating the first transmission roller in the reverse direction with the coating substrate, the transmission rod, the docking member and the detection needle can be driven to rotate. During the rotation of the detection needle, it is inserted into the surface coating of the coating substrate in sequence, and the coating will adhere to the detection needle. The coating substrate is detected in multiple coating areas through multiple groups of docking members and detection needles, and then the data is compared and analyzed by the detection component to determine whether the coating thickness in multiple areas is uniform. Description of the Drawings

[0013] Figure 1 is a schematic plan view of the present invention; Figure 2 is a schematic disassembled structure view of the test coating component and the collection component of the present invention; Figure 3 is a schematic sectional structure view of the test coating component of the present invention; Figure 4 is of the present invention Figure 3 is an enlarged structure view of part A in the present invention; Figure 5 is of the present invention Figure 3 is an enlarged structure view of part B in the present invention; Figure 6 is a schematic sectional structure view of the transmission component and the detection component of the present invention; Figure 7 is a schematic disassembled structure view of the test coating component, the transmission component and the detection component of the present invention; Figure 8 is a schematic disassembled structure view of the transmission component and the detection component of the present invention.

[0014] In the figure: 1. Supporting frame; 2. Trial coating assembly; 21. First driving roller; 22. Coating substrate; 23. Partition ring; 24. First driving gear; 25. Second driving roller; 3. Collection assembly; 31. Docking plate; 32. Partition plate; 33. Collector; 34. Storage tank; 35. Connecting frame; 4. Coating die head body; 5. Driving assembly; 51. First support frame; 52. Lifting structure; 53. Docking piece; 54. Detection needle; 55. Driving rod; 6. Detection assembly; 61. Second support frame; 62. Sponge cleaning piece; 63. High-definition camera; 64. Second driving gear. Detailed implementation manner

[0015] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0016] As Figures 1 to 8 shown, the present invention provides a trial coating device for a coating die head, including a supporting frame 1 and a coating die head body 4. The coating die head body 4 is arranged on the side of the supporting frame 1, and further includes: A trial coating assembly 2, which is arranged on the supporting frame 1; A collection assembly 3, which is installed on the side of the supporting frame 1 and is located between the coating die head body 4 and the supporting frame 1; A driving assembly 5, which is installed on the top of the supporting frame 1, and a detection assembly 6 is fixedly installed outside the driving assembly 5; Among them, the trial coating assembly 2 includes a first driving roller 21 and a second driving roller 25 arranged on the supporting frame 1. The outside of the first driving roller 21 and the second driving roller 25 is sleeved with a coating substrate 22, and partition rings 23 are fixedly installed at equal intervals on the outside of the coating substrate 22; The partition rings 23 divide the outside of the coating substrate 22 into multiple coating areas; The collection assembly 3 includes a docking plate 31 fixedly installed on the side of the supporting frame 1. Partition plates 32 are fixedly installed at equal intervals in the docking plate 31. The partition plates 32 correspond to the partition rings 23, and the upper and lower ends of the partition plates 32 are clamped outside the partition rings 23; The partition plates 32 divide the discharge port of the coating die head body 4 into multiple areas, and the multiple coating areas of the coating substrate 22 are consistent with the multiple areas of the discharge port of the coating die head body 4; A driving motor for driving the first driving roller 21 and the coating substrate 22 to rotate is arranged outside the supporting frame 1, and the first driving roller 21 and the coating substrate 22 are driven by means of gears, chains, etc.; The coated substrate 22 is made of a metal sheet material. The slurry ejected from the coating die body 4 is guided by the partition plate 32 and evenly sprayed onto the surface of the rotating coated substrate 22, and a plurality of coating areas are formed on the coated substrate 22. The collecting assembly 3 further includes a collecting member 33 fixedly installed between two adjacent partition plates 32 through a connecting frame 35, and the top end of the collecting member 33 is in contact with the coated substrate 22. The collecting members 33 are sequentially arranged in a plurality of areas outside the coated substrate 22, and both sides of the collecting member 33 are in contact with the opposite sides of two adjacent partition rings 23.

[0017] A detachable storage tank 34 is arranged at the bottom of the collecting member 33, and a scale line is arranged on the storage tank 34 for observing the capacity.

[0018] The slurry ejected from the coating die body 4 is guided by the partition plate 32 and evenly sprayed onto the outside of the coated substrate 22. The driving motor drives the first driving roller 21 and the coated substrate 22 to rotate, so that the slurry ejected from the coating die body 4 is evenly attached to a plurality of areas outside the coated substrate 22. The rotation of the coated substrate 22 can simulate the actual production coating process. After the coating die body 4 finishes the trial coating on the coated substrate 22, the driving motor drives the first driving roller 21 and the coated substrate 22 to rotate in the reverse direction. Since the top end of the collecting member 33 abuts against the coated substrate 22, during the reverse rotation of the coated substrate 22, the externally attached coating is guided by the collecting member 33 and collected inside the storage tank 34. The coating externally attached to the coated substrate 22 is completely collected inside the storage tank 34. The capacity of the collected slurry is observed through the scale arranged outside the storage tank 34. Furthermore, the capacity of the sprayed slurry in one area of the coated substrate 22 can be observed. By comparing the slurries collected in a plurality of storage tanks 34, the discharge port of the coating die body 4 can be divided into a plurality of areas, and the discharge amounts of the plurality of areas can be compared and detected. If the slurry capacity in one of the storage tanks 34 is lower than the slurry capacity in other storage tanks 34, it indicates that the discharge amount of the discharge port of the coating die body 4 in the corresponding area is lower than the flow rate of the discharge in other areas.

[0019] Here, it is stated that the number of the partition plates 32 and the coated substrate 22 can be increased or decreased according to actual needs, so as to improve the accuracy of detecting the discharge amount of the discharge port of the coating die body 4.

[0020] The trial coating material of the coating die in this application is a non-instant drying material, including a high-boiling solvent system: such as lithium battery slurry (NMP solvent has a high boiling point), which needs to be dried in sections in an oven at 80-120 °C, and the time-consuming is several minutes to several hours.

[0021] Coating process of lithium battery slurry (NMP solvent): I. Preparation before coating 1. Slurry pretreatment Degassing treatment: Vacuum stirring (-95kPa, 30-60 minutes) to remove slurry bubbles and avoid coating pinholes.

[0022] Viscosity adjustment: Controlled to 3,000-10,000 cP (25°C), adjusted by the amount of NMP added to ensure leveling.

[0023] Filtration: 5-20μm metal filter to remove particulate impurities (such as undispersed conductive agent agglomerates).

[0024] 2. Substrate treatment Copper / aluminum foil cleaning: plasma treatment or alcohol wiping to increase surface energy (up to 40-50 mN / m).

[0025] Tension control: substrate unwinding tension is 10-30N to prevent wrinkles (extremely thin foil requires <15N).

[0026] 2. Coating stage 1. Equipment configuration Die type: Slot coating die (gap 100-300μm, lip angle 45°).

[0027] Temperature control system: The die head is kept at a constant temperature of 40-50°C (to prevent NMP from volatilizing and crystallizing and clogging the slit).

[0028] 2. Coating method Single-sided coating: After the first coating, let it stand for 5-10 seconds to prevent it from flowing.

[0029] 3. Drying process 1. Sectional drying The first stage: 80-100 ° C (2-3 minutes), remove 80% of free NMP.

[0030] The second stage: 120-130℃ (5-8 minutes) to completely evaporate the residual solvent.

[0031] The third stage: tempering at 60℃ (2 minutes) to release internal stress and prevent curling.

[0032] At the same time, this application is used for trial coating of the coating touch head, which does not require continuous coating and can meet the needs of trial coating and testing. After the lithium battery slurry (NMP solvent has a high boiling point) is coated, it needs to be dried in an oven to solidify. During the trial coating process, there is no need to dry it, and the coating material can be collected.

[0033] like Figures 5 - 8 As shown, the transmission assembly 5 includes a first support frame 51 fixedly mounted on the top of the receiving frame 1, a transmission rod 55 is movably mounted on the first support frame 51 through a lifting structure 52, a docking piece 53 is fixedly mounted equidistantly on the outside of the transmission rod 55, and a detection needle 54 is arranged in an annular array on the outside of the docking piece 53; A vertical rectangular through - slot is provided in the middle of the first support frame 51, and the transmission rod 55 passes through the vertical rectangular through - slot; At both ends of the transmission rod 55, second transmission gears 64 are fixedly installed. At both ends of the first transmission roller 21, first transmission gears 24 are fixedly installed. When the transmission rod 55 is located at the lower end of the vertical rectangular through - slot, the second transmission gears 64 are meshed with the first transmission gears 24; The docking member 53 corresponds to multiple coating areas of the coated substrate 22. When the detection needle 54 is perpendicular to the coated substrate 22, the detection needle 54 does not contact the coated substrate 22.

[0034] By rotating the lifting structure 52 to drive the transmission rod 55 to move upward along the vertical rectangular through - slot, the second transmission gears 64 are disengaged from the meshing with the first transmission gears 24. At this time, the slurry is sprayed onto the rotating coated substrate 22 through the coating die head body 4. During the coating process, the slurry is guided by the partition plate 32, so that the slurry gathers in each coating area on the coated substrate 22, thereby increasing the coating thickness of each area of the coated substrate 22. After the trial coating of the coated substrate 22 is completed, the lifting structure 52 is rotated in the reverse direction to make the second transmission gears 64 meshed with the first transmission gears 24. By the reverse rotation of the first transmission roller 21 and the coated substrate 22, the transmission rod 55, the docking member 53 and the detection needle 54 can be driven to rotate. During the rotation of the detection needle 54, it is inserted into the surface coating of the coated substrate 22 in sequence, and the coating will adhere to the detection needle 54. The multiple coating areas of the coated substrate 22 are detected by multiple groups of docking members 53 and detection needles 54, and then the data is compared and analyzed by the detection component 6, so as to judge whether the coating thickness of multiple areas is uniform.

[0035] As Figures 5 - 8 shown, the detection component 6 includes a second support frame 61 fixedly installed between two first support frames 51, and a high - definition camera 63 is fixedly installed on the side of the second support frame 61; On the other side of the second support frame 61, a detachable sponge cleaning member 62 is installed. One end of the sponge cleaning member 62 is provided with a cleaning gap corresponding to the detection needle 54.

[0036] By rotating the detection needle 54 and inserting it into each coating area of the coated substrate 22, the slurry in each area adheres to the detection needle 54. When the detection needle 54 rotates to the vertical state, a high - definition camera image of the detection needle 54 is taken through the high - definition camera 63. Through the image, the height of the slurry adhering to the multiple detection needles 54 can be visually reflected, and then it can be judged whether the coating thickness on the coated substrate 22 is consistent. By continuously rotating the detection needle 54 through the cleaning gap, the slurry adhering to the surface of the detection needle 54 is cleaned by the sponge cleaning member 62, and then it can be recycled.

[0037] The working principle and usage process of the present invention: The slurry separator plate 32 is ejected through the coating die head body 4 to guide and evenly spray it onto the outside of the coating substrate 22. The driving motor drives the first driving roller 21 and the coating substrate 22 to rotate, so that the slurry ejected from the coating die head body 4 is evenly attached to multiple areas outside the coating substrate 22. The rotation of the coating substrate 22 can simulate the actual production coating process. After the coating die head body 4 finishes the trial coating on the coating substrate 22, the driving motor drives the first driving roller 21 and the coating substrate 22 to rotate in the reverse direction. Since the top of the collecting member 33 abuts against the coating substrate 22, during the reverse rotation of the coating substrate 22, the coating attached to the outside is guided by the collecting member 33 and collected inside the storage tank 34. The coating attached to the outside of the coating substrate 22 is completely collected inside the storage tank 34. By observing the scale set outside the storage tank 34, the capacity of the collected slurry can be observed, and then the capacity of the slurry sprayed on one area of the coating substrate 22 can be observed. By comparing the slurries collected in multiple storage tanks 34, the discharge port of the coating die head body 4 can be divided into multiple areas, and the discharge amounts of multiple areas can be compared and detected; If the slurry capacity in one of the storage tanks 34 is lower than the slurry capacity in other storage tanks 34, it means that the discharge amount of the discharge port in the corresponding area of the coating die head body 4 is lower than the flow rate of the discharge in other areas; By rotating the lifting structure 52 to drive the transmission rod 55 to move upward along the vertical rectangular through groove, the second transmission gear 64 disengages from the first transmission gear 24. At this time, the slurry is sprayed onto the rotating coating substrate 22 through the coating die head body 4. During the coating process, the slurry is guided by the separator plate 32, so that the slurry gathers in each coating area on the coating substrate 22, thereby increasing the coating thickness of each area of the coating substrate 22. After the trial coating of the coating substrate 22 is completed, the lifting structure 52 is rotated in the reverse direction to make the second transmission gear 64 engage with the first transmission gear 24. By rotating the first driving roller 21 and the coating substrate 22 in the reverse direction, the transmission rod 55, the docking member 53 and the detection needle 54 can be driven to rotate. During the rotation of the detection needle 54, it is inserted into the surface coating of the coating substrate 22 in turn, and the coating will adhere to the detection needle 54. Multiple coating areas of the coating substrate 22 are detected by multiple groups of docking members 53 and detection needles 54. By rotating the detection needle 54 and inserting it into each coating area of the coating substrate 22, the slurry in each area adheres to the detection needle 54. When the detection needle 54 rotates to the vertical state, a high-definition camera 63 takes a high-definition camera picture of the detection needle 54. Through the picture, the height of the slurry attached to multiple detection needles 54 can be intuitively reflected, and then it can be judged whether the coating thickness on the coating substrate 22 is consistent. By continuously rotating the detection needle 54 through the cleaning gap, the slurry attached to the surface of the detection needle 54 is cleaned by the sponge cleaning member 62, and then it can be recycled.

[0038] It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0039] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coating die trial coating device, comprising a receiving frame (1) and a coating die body (4), wherein the coating die body (4) is arranged on the side of the receiving frame (1), characterized in that: Also includes: A trial coating component (2), wherein the trial coating component (2) is arranged on the receiving frame (1); A collecting assembly (3), the collecting assembly (3) being mounted on a side of the receiving frame (1) and being located between the coating die head body (4) and the receiving frame (1); A transmission assembly (5), the transmission assembly (5) being mounted on the top of the receiving frame (1), and a detection assembly (6) being fixedly mounted on the outside of the transmission assembly (5); The test coating assembly (2) comprises a first transmission roller (21) and a second transmission roller (25) which are arranged on the receiving frame (1); the first transmission roller (21) and the second transmission roller (25) are sleeved with a coating substrate (22) on the outside; and the coating substrate (22) is fixedly provided with a separation ring (23) at equal intervals on the outside; The separation ring (23) separates the outside of the coating substrate (22) into a plurality of coating areas; The collecting assembly (3) comprises a docking plate (31) fixedly mounted on the side of the receiving frame (1), and partition plates (32) are fixedly mounted in the docking plate (31) at equal intervals, the partition plates (32) correspond to the partition ring (23), and the upper and lower ends of the partition plates (32) are engaged with the outside of the partition ring (23); The partition plate (32) divides the discharge port of the coating die head body (4) into a plurality of regions, and the plurality of coating regions of the coating substrate (22) are consistent with the plurality of regions of the discharge port of the coating die head body (4).

2. The coating die head trial coating device according to claim 1, characterized in that: A driving motor for driving the first transmission roller (21) and the coating substrate (22) to rotate is arranged outside the receiving frame (1); The coating substrate (22) is made of a metal sheet material, and the slurry sprayed from the coating die head body (4) is guided by a partition plate (32) to be evenly sprayed onto the surface of the rotating coating substrate (22), thereby forming a plurality of coating areas on the coating substrate (22).

3. The coating die head trial coating device according to claim 2, characterized in that: The collecting assembly (3) further comprises a collecting member (33) fixedly mounted between two adjacent partition plates (32) via a connecting frame (35), wherein a top end of the collecting member (33) is in contact with the coating substrate (22); The collecting member (33) is sequentially arranged in a plurality of coating areas outside the coating substrate (22), and two sides of the collecting member (33) are in contact with opposite sides of two adjacent separation rings (23).

4. The coating die head trial coating device according to claim 3, characterized in that: A detachable storage tank (34) is provided at the bottom of the collecting member (33), and scale lines are provided on the storage tank (34) for observing the capacity.

5. The coating die head trial coating device according to claim 1, characterized in that: The transmission assembly (5) comprises a first support frame (51) fixedly mounted on the top of the receiving frame (1); a transmission rod (55) is movably mounted on the first support frame (51) via a lifting structure (52); docking pieces (53) are fixedly mounted at equal intervals on the outside of the transmission rod (55); and detection needles (54) are arranged in an annular array on the outside of the docking pieces (53); A vertical rectangular through slot is provided in the middle of the first support frame (51), and the transmission rod (55) passes through the vertical rectangular through slot.

6. The coating die head trial coating device according to claim 5, characterized in that: The transmission rod (55) is fixedly provided with a second transmission gear (64) at both ends, and the first transmission roller (21) is fixedly provided with a first transmission gear (24) at both ends; when the transmission rod (55) is located at the lower end of the vertical rectangular through slot, the second transmission gear (64) meshes with the first transmission gear (24); The docking piece (53) keeps corresponding to a plurality of coating areas of the coated substrate (22); when the detection needle (54) keeps perpendicular to the coated substrate (22), the detection needle (54) does not contact the coated substrate (22).

7. The coating die head trial coating device according to claim 6, characterized in that: The detection assembly (6) comprises a second support frame (61) fixedly mounted between the two first support frames (51), and a high-definition camera (63) is fixedly mounted on the side of the second support frame (61).

8. The coating die head trial coating device according to claim 7, characterized in that: A detachable sponge cleaning piece (62) is mounted on the other side of the second support frame (61), and a cleaning gap corresponding to the detection needle (54) is formed at one end of the sponge cleaning piece (62).

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