Intelligent coating die head, coating device and coating method thereof

Abstract

The present invention discloses an intelligent coating die head, a coating device and a coating method thereof. The coating die head comprises a first die head, a second die head and a plurality of thickness measuring components, wherein the second die head is connected and fixed to the first die head; the thickness measuring components are arranged at intervals on the first die head or the second die head, and each thickness measuring component is suitable for being arranged downstream of a backing roller component to measure the thickness of a coating applied on a substrate. The present invention improves the structure of the coating die head, effectively improves the control accuracy of the coating thickness, and thereby improves the uniformity of the coating.

Description

Technical Field

[0001] The present invention relates to the technical field of coating machines, and in particular to an intelligent coating die head, a coating device and a coating method thereof. Background Art

[0002] At present, the coating die head provides the function of spraying active substances during the coating process. The spraying slit size can be adjusted manually during the spraying process, and the coating thickness can also be adjusted by the electric actuator in a cut-off manner. During the adjustment process, the closed-loop adjustment function is generally achieved by manually observing the thickness measuring device or automatically sending the thickness measuring data to the control system.

[0003] In the prior art, the coating die head and the thickness measuring device are independently arranged. The thickness measuring device uses a thickness measuring sensor device installed above and below the coated thin material, and reciprocates to detect the thickness or surface density data of the thin material coated with the active substance for closed-loop adjustment of the thickness or surface density.

[0004] However, the sampling coverage of the existing reciprocating thickness measuring equipment is less than 5% when the coating speed is higher than 30m / min, and the sampling coverage will further decrease as the coating speed increases. The communication link between the thickness measuring equipment and the coating adjustment die is too long, which further limits the response time of the coating adjustment. In addition, since the thickness measuring device is fixed behind the back roller and is used to measure the thickness of the wet film after coating, the tape path from the coating position to the thickness measuring device is long. Each adjustment needs to go through the process of measurement-communication-calculation-adjustment-waiting time for tape to the thickness measuring position-measurement, which increases the waiting time for tape and communication during the debugging process, and increases the response time of the system debugging. This causes a lag in the coating die's action of adjusting the coating thickness, and the coating die's coating thickness adjustment control accuracy is low, and there is still a problem of poor coating uniformity. Summary of the invention

[0005] The main purpose of the present invention is to provide an intelligent coating die head, a coating device and a coating method thereof, aiming to improve the control accuracy of coating thickness and thus improve the uniformity of coating.

[0006] To achieve the above object, the present invention provides an intelligent coating die head, comprising:

[0007] The first die head;

[0008] A second die head, connected and fixed to the first die head; and

[0009] The thickness measuring assembly is arranged at intervals on the first die head or the second die head, and each of the thickness measuring assemblies is suitable for being arranged close to the downstream of the backing roller assembly to measure the thickness of the coating coated on the substrate.

[0010] Optionally, the thickness measuring component comprises:

[0011] A laser sensor, wherein the first die head is provided with a mounting hole for mounting the laser sensor, and the laser sensor is suitable for signal connection with a control component; and

[0012] A light-transmitting member is installed at the end of the installation hole and is located on the monitoring path of the laser sensor, or the light-transmitting member is integrally formed with the laser sensor.

[0013] Optionally, the thickness measuring component further includes:

[0014] A position adjusting member is arranged on the first die head and connected to the laser sensor so as to adjust the position of the laser sensor.

[0015] Optionally, the first die head is further provided with a sealing cover, the sealing cover is provided on the mounting hole, and the sealing cover is provided with a wire passing hole for a signal wire of the laser sensor to pass through.

[0016] Optionally, at least one die is disposed between the first die and the second die to form at least two coating slits.

[0017] Optionally, the first die head is provided with a receiving groove, and a first gasket is sandwiched between the first die head and the second die head to form a first coating slit, and the first coating slit is connected to the receiving groove;

[0018] The coating die also includes:

[0019] An electric adjustment mechanism is inserted into the accommodating groove and extends into the coating slit. The electric adjustment mechanism is suitable for being connected to a control component signal to adjust the discharge amount of the coating slit.

[0020] Optionally, there are multiple electric adjustment mechanisms, and the multiple electric adjustment mechanisms are inserted into the receiving groove;

[0021] Each of the electric adjustment mechanisms comprises a linear motor and an adjustment block drivingly connected to the linear motor, and the adjustment block extends into the coating slit to change the coating surface density.

[0022] Optionally, the coating die head further comprises a third die head, the third die head is connected and fixed to the second die head, and a second gasket is sandwiched between the second die head and the third die head to form a second coating slit.

[0023] In order to achieve the above object, the present invention further provides a coating device, comprising:

[0024] A back roller assembly, used to drive the substrate wound thereon to move;

[0025] A coating die, the coating die being the coating die as described above, the coating die being used for coating the slurry onto the substrate on the backing roll assembly; and

[0026] A control component is connected to the thickness measuring component signal to control the coating die head according to the coating thickness signal; wherein the coating die head comprises:

[0027] The first die head;

[0028] A second die head, connected and fixed to the first die head; and

[0029] The thickness measuring component is arranged in the first die head or the second die head to measure the thickness of the coating applied on the substrate.

[0030] Optionally, the coating die is fixed on a die support;

[0031] The back roller assembly comprises:

[0032] A coating roller, wherein the coating lip of the coating die head presses against the coating roller passing around the substrate and applies the coating inside the coating roller to the substrate, and the coating roller is fixed to the die head bracket through a bearing;

[0033] A driving member, connected to the coating roller driving and connected to the control component signal; and

[0034] An encoder is fixed on the die head bracket and connected to one end of the coating roller via a coupling. The encoder is connected to the control component signal to detect the rotation angle of the drive member and output a coating roller position signal to the control component. The control component is also used to control the operation of the coating die head according to the coating roller position signal.

[0035] In order to achieve the above object, the present invention further proposes a coating method, based on the coating device as described above, the coating method comprises the following steps:

[0036] S10, measuring the coating distance between the substrate on the coating roller and the coating die head;

[0037] S20, detecting the current rotation angle of the driving member, and determining the current reference size corresponding to the current rotation angle according to the rotation angle-reference size relationship table;

[0038] S30, calculating the current coating thickness according to the current reference size, the coating spacing and the preset substrate thickness;

[0039] S40, controlling the electric adjustment mechanism to operate according to the current coating thickness, so as to adjust the current coating thickness to a target coating thickness.

[0040] Optionally, before step S10, the method further includes:

[0041] S07, when the substrate is not wound around the coating roller, controlling the driving member to drive the coating roller to rotate;

[0042] S08, detecting and recording the reference dimensions between each position on the coating roller surface and the coating die head at different rotation angles of the driving member;

[0043] S09, associating the rotation angle with the corresponding rotation angle to obtain the rotation angle-reference dimension relationship table.

[0044] Optionally, in step S30, the coating thickness is defined as d, the coating interval is defined as a, the current reference size is defined as b, and the preset substrate thickness is defined as c, which satisfies the relationship: d=abc.

[0045] In the technical solution of the present invention, the coating die head includes a first die head, a second die head and a plurality of thickness measuring components, the second die head is connected and fixed to the first die head; the plurality of thickness measuring components are arranged at intervals on the first die head or the second die head, and each thickness measuring component is suitable for being arranged downstream of the back roller component, so as to measure the thickness of the coating applied on the substrate. It can be understood that the present invention improves the structure of the coating die head, arranges the thickness measuring component on the coating die head and arranges it downstream of the back roller component, and the thickness measuring component is connected to the intelligent closed-loop control system through a signal cable or wireless communication, etc., which can reduce the tape path from the coating position to the thickness measuring position, improve the response speed of debugging and reduce the response time, effectively improve the control accuracy of the coating thickness, and thus improve the uniformity of the coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0047] Figure 1 This is a schematic structural diagram of an embodiment of an intelligent coating die head of the present invention;

[0048] Figure 2 A cross-sectional view of an embodiment of the intelligent coating die head of the present invention;

[0049] Figure 3 A first cross-sectional view of a coating die head and a backing roller assembly in one embodiment of a coating device of the present invention;

[0050] Figure 4 A second cross-sectional view of a coating die head and a backing roller assembly in one embodiment of a coating device of the present invention;

[0051] Figure 5 It is a schematic structural diagram of a coating die head and a backing roller assembly in one embodiment of a coating device of the present invention;

[0052] Figure 6 FIG. 4 is a schematic diagram of a process of a coating method according to an embodiment of the present invention.

[0053] Description of Figure Numbers:

[0054] 1. substrate; 100. coating die; 200. back roller assembly; 10. first die; 20. second die; 30. thickness measuring assembly; 31. laser sensor; 32. light-transmitting member; 33. position adjusting member; 311. first fixing member; 321. second fixing member; 34. sealing cover; 312. signal line; 40. first gasket; 20a. coating dispensing chamber; 50. electric adjustment mechanism; 51. linear motor; 52. adjustment block; 53. fixed base; 101. die bracket; 210. coating roller; 220. driving member; 230. encoder; 231. fixed bracket; 240. coupling.

[0055] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0058] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0059] The present invention proposes an intelligent coating die head, which can be used for a single-layer coating device or a double-layer coating device, especially a high-temperature slurry coating device, and the coating can be an active substance such as a slurry or a powder, which is not limited here. The application scenario of the coating die head of the present invention is not limited to battery pole piece coating, but can also be applied to substrate-free cast coating scenarios.

[0060] Reference Figures 1 to 4 In one embodiment of the present invention, the intelligent coating die 100 includes a first die 10, a second die 20 and a plurality of thickness measuring components 30, wherein the second die 20 is connected and fixed to the first die 10; the plurality of thickness measuring components 30 are arranged at intervals on the first die 10 or the second die 20, and each thickness measuring component is suitable for being arranged downstream of the back roller component 200 to measure the thickness of the coating applied on the substrate 1.

[0061] In this embodiment, the first die head 10 can be an upper die head, and the second die head 20 can be a lower die head; of course, the first die head 10 can also be a lower die head, and the second die head 20 can be an upper die head. That is to say, the thickness measuring assembly 30 in this embodiment can be installed on the upper die head or the lower die head, which is not specifically limited here.

[0062] For ease of understanding, the following will be described in detail by taking the first die head 10 as the upper die head and the second die head 20 as the lower die head as an example.

[0063] Among them, Figure 4 As shown, the substrate 1 is wound on the backing roller, and the rotation of the backing roller drives the substrate 1 thereon from the previous process through the coating die head 100 to the next process, and the downstream of the backing roller is the discharge end of the backing roller. In this embodiment, by arranging the thickness measuring components 30 close to the downstream of the backing roller component 200, the coating thickness can be detected in time and fed back to the control system, and the control system controls the regulating mechanism to adjust the coating surface density, which reduces the response time, effectively improves the control accuracy of the coating thickness, and thus improves the uniformity of the coating.

[0064] In this embodiment, the first die head 10 may be provided with a receiving groove into which the electric adjustment mechanism 50 is inserted, and a gasket is sandwiched between the first die head 10 and the second die head 20 to form a coating slit, and the coating slit is connected to the receiving groove. The electric adjustment mechanism 50 is inserted in the receiving groove and extends into the coating slit to adjust the discharge amount of the coating slit.

[0065] It should be noted that in this embodiment, the thickness measuring component 30 and the electric adjustment mechanism 50 are both connected to the intelligent closed-loop control system signal, and respectively measure the coating thickness and adjust the coating thickness under the control of the intelligent closed-loop control system.

[0066] In this embodiment, the thickness measuring component 30 can be a laser distance measuring sensor, a laser distance measuring sensor, an ultrasonic distance measuring sensor, an infrared distance measuring sensor, etc., which is not limited here.

[0067] In the technical solution of the present invention, the coating die 100 includes a first die 10, a second die 20 and a plurality of thickness measuring components 30, wherein the second die 20 is connected and fixed to the first die 10; the plurality of thickness measuring components 30 are arranged at intervals on the first die 10 or the second die 20, and each thickness measuring component is suitable for being arranged downstream of the back roller component 200, so as to measure the thickness of the coating applied on the substrate 1. It can be understood that the present invention improves the structure of the coating die 100, arranges the thickness measuring component 30 in the coating die 100, and the thickness measuring component 30 is connected to the intelligent closed-loop control system through the signal line 312, which can reduce the tape path from the coating position to the thickness measuring position, improve the response speed of the debugging, reduce the response time, effectively improve the control accuracy of the coating thickness, and thus improve the uniformity of the coating.

[0068] In one embodiment, the coating die 100 may be a double-layer or multi-layer coating die, and the coating die 100 may further include at least one die, and at least one die is disposed at the first die 10 and the second die 20 to form at least two coating slits. In this way, double-layer or multi-layer coating is achieved, which greatly improves the coating efficiency and saves production costs.

[0069] Main references Figure 1 and Figure 2 In one embodiment, the thickness measuring component 30 may include a laser sensor 31 and a light-transmitting member 32. The first die head 10 is provided with a mounting hole for installing the laser sensor 31, and the laser sensor 31 is suitable for signal connection with the control component; the light-transmitting member 32 is installed at the end of the mounting hole and is located on the monitoring path of the laser sensor 31, that is, one side of the light-transmitting member 32 is arranged opposite to the light-emitting side of the laser sensor 31, and the other side of the light-transmitting member 32 is suitable for being arranged opposite to the thickness measuring point of the substrate 1 on the back roller.

[0070] In addition, the light-transmitting member 32 and the laser sensor 31 may also be manufactured in one piece to facilitate assembly of the coating die head.

[0071] In this embodiment, the laser sensor 31 is used to measure the coating thickness. The number of the laser sensor 31 can be one or more. The number of corresponding light-transmitting parts 32, mounting holes and other structures is the same as the number of laser sensors 31. The laser sensor 31 can be fixed in the mounting hole by the first fixing part 311.

[0072] It should be noted that, by providing a plurality of laser sensors 31 to detect the coating thickness, the coverage of the coating thickness measurement can be greatly improved, so as to further improve the measurement accuracy and coating uniformity.

[0073] In this embodiment, the light-transmitting member 32 may be optical glass, which may be fixed to the end of the mounting hole by the second fixing member 321. Its function is, on the one hand, to allow the detection light of the laser sensor 31 to pass through; on the other hand, it has a dust-proof effect to prevent dust from gathering on the laser sensor 31 and affecting the accuracy of thickness measurement.

[0074] It is worth mentioning that, compared with the prior art, the laser sensor 31 of this embodiment can be provided in plurality, and the plurality of laser sensors 31 can be provided side by side inside the coating die head 100, which can greatly improve the coverage of thickness measurement. In addition, compared with the solution of providing the thickness measuring device on the rear side of the backing roller in the prior art, the laser sensor 31 of the present invention is installed on the first die head 10, which can reduce the belt path from the coating position to the thickness measuring position, improve the response speed of debugging, reduce the response time, and help to further improve the coating control accuracy and consistency.

[0075] It should also be noted that the response time of the laser sensor 31 used in the present invention is about 1ms, and the intelligent closed-loop control system can obtain measured thickness data every millisecond, which greatly improves the coverage of thickness sampling and reduces the data sampling response time. The electric adjustment mechanism 50 is controlled to process thickness changes at a millisecond response speed, which can effectively improve the control accuracy of the coating thickness and improve the consistency of the coating.

[0076] In order to improve the accuracy of the thickness measuring component 30 in measuring the coating thickness, Figure 3 and Figure 4 As shown, in one embodiment, the thickness measuring assembly 30 may further include a position adjusting member 33 , which is disposed on the first die head 10 and connected to the laser sensor 31 , so as to adjust the position of the laser sensor 31 .

[0077] In this embodiment, the laser sensor 31 can be set to be threaded. Specifically, the position adjustment member 33 can be set to be cylindrical, the laser sensor 31 is fixed in the position adjustment member 33, and the outer wall of the position adjustment member 33 is provided with an external thread matching the internal thread in the fixing hole of the laser sensor 31. By rotating the position adjustment member 33, the laser sensor 31 can be screwed in or out, and the position of the laser sensor 31 can be adjusted.

[0078] When the first fixing member 311 is disposed in the mounting hole, the first fixing member 311 may be provided with an internal thread, and the position adjusting member 33 may be provided with an external thread adapted thereto to achieve position adjustment.

[0079] In addition, the laser sensor 31 can also be configured to be fixed by a clamping method. Specifically, the position adjustment member 33 is configured to be cylindrical, the laser sensor 31 is fixed in the position adjustment member 33, a plurality of convex rings are provided on the outer wall of the position adjustment member 33, a plurality of annular grooves are provided in the mounting hole of the first die head 10, the annular grooves match the convex rings, and the position adjustment member 33 is pushed in or pushed out to drive the laser sensor 31 therein to adjust its position.

[0080] It should be noted that, in this embodiment, the position adjustment method of the laser sensor 31 is not limited to the above-mentioned solution, and no specific limitation is made here. As long as the structure can realize the movement and locking of the position adjustment member 33 in the installation hole, it can be used.

[0081] refer to Figure 2 In one embodiment, the first die head 10 is further provided with a sealing cover 34, and the sealing cover 34 is provided on the mounting hole. In this way, the stability of the side thickness component installation can be improved, and liquids such as slurry or water can be prevented from flowing into the mounting hole to damage the laser sensor 31, thereby extending the service life of the laser sensor 31.

[0082] Furthermore, in this embodiment, a wire hole for passing the signal wire 312 of the laser sensor 31 may be provided on the sealing cover 34. In this way, it is convenient for the optical fiber and other cables of the laser sensor 31 to pass through.

[0083] Of course, in some other embodiments, a wireless communication module can also be used to transmit data. The wireless communication module can be installed in the mounting hole and electrically connected to the laser sensor 31, and establish wireless communication with the intelligent closed-loop control system. In this case, there is obviously no need to open a wire hole on the sealing cover 34.

[0084] In order to significantly increase the coverage of thickness measurement and improve the control accuracy of coating thickness, refer to Figure 1 In some embodiments, there may be multiple laser sensors 31 , the number of mounting holes is the same as the number of laser sensors 31 , and multiple laser sensors 31 are arranged side by side in a one-to-one manner in the multiple mounting holes.

[0085] refer to Figures 1 to 4 In one embodiment, the coating die head 100 is a single-layer coating die head 100, the first die head 10 may be provided with a receiving groove, a first gasket 40 is sandwiched between the first die head 10 and the second die head 20 to form a first coating slit, the first coating slit is connected to the receiving groove; the second die head 20 is provided with a feed port and a coating dispensing chamber 20a connected to the feed port, the coating dispensing chamber 20a is connected to the coating slit. The coating die head 100 may also include an electric adjustment mechanism 50, the electric adjustment mechanism 50 is inserted into the receiving groove and extends into the coating slit, the electric adjustment mechanism 50 is suitable for being connected to the control component signal to adjust the discharge amount of the coating slit.

[0086] It can be understood that in this embodiment, the intelligent closed-loop control system can obtain the thickness data measured by the thickness measuring component 30 every millisecond, and then control the electric adjustment mechanism 50 to process the thickness change at a millisecond response speed, which can effectively improve the control accuracy of the coating thickness and further improve the consistency of the coating.

[0087] Furthermore, in this embodiment, there are multiple electric adjustment mechanisms 50, which are inserted into the receiving groove; each electric adjustment mechanism 50 includes a linear motor 51 and an adjustment block 52 connected to the linear motor 51, and the linear motor 51 can be fixed to the first die head 10 through a fixed base 53, and the adjustment block 52 extends into the coating slit to change the coating surface density. In this way, the coating thickness control accuracy can be further improved.

[0088] The present invention also proposes a coating device, which can be a single-layer coating device or a double-layer coating device, and its coating can be an active substance such as a slurry or a powder, especially a high-temperature slurry coating device, which is not limited here. In addition, the present invention can be applied to the application of the cast coating scene without a substrate. In this scene, the interference of the substrate on the measurement of thickness can be eliminated, and the accuracy of measurement and control can be improved.

[0089] refer to Figures 3 to 5 In one embodiment of the present invention, the coating device includes a coating die 100, a back roller assembly 200 and a control assembly, wherein the back roller assembly 200 is used to drive the substrate 1 wound thereon to move; the coating die 100 is the coating die 100 as described above, and the coating die 100 is used to coat the slurry to the substrate 1 on the back roller assembly 200; the control assembly is connected to the thickness measuring assembly 30 by signal, so as to control the operation of the coating die 100 according to the coating thickness signal.

[0090] Since the coating device includes a coating die 100, the specific structure of the coating die 100 refers to the above-mentioned embodiment. Since the coating device proposed in the present invention includes all schemes of all embodiments of the above-mentioned coating die 100, it has at least the same technical effect as the coating die 100, which will not be elaborated here one by one.

[0091] Main reference Figure 5 In one embodiment, the coating die 100 is fixed on the die support 101; the back roller assembly 200 may include a coating roller 210, a driving member 220 and an encoder 230. The coating lip of the coating die 100 presses against the coating roller 210 that passes around the substrate 1, and applies the coating inside it to the substrate 1. The coating roller 210 is fixed to the die support 101 through a bearing; the driving member 220 is connected to the coating roller 210 by driving and connected to the control component signal; the encoder 230 can be fixed to the die support 101 through a fixed bracket 231, and the encoder 230 is connected to one end of the coating roller 210 through a coupling 240. The encoder 230 is connected to the control component signal to detect the rotation angle of the driving member 220 and output the coating roller 210 position signal to the control component. The control component is also used to control the operation of the coating die 100 according to the coating roller 210 position signal.

[0092] In this embodiment, the encoder 230 can record the rotation position of the motor, that is, the rotation position of the coating roller 210. During the calibration process, the encoder 230 cooperates with the laser sensor 31 to record the dimensions of the coating roller 210 at different circumferential positions and store them in the control system. The control system adjusts the operation of the electric adjustment mechanism 50 according to the real-time measured data and the system cache data, and then adjusts the coating thickness in time, which can greatly improve the control accuracy of the coating thickness and effectively improve the uniformity of the coating.

[0093] The present invention also provides a coating method, based on the coating device as described above, referring to Figure 6 , the coating method comprises the following steps:

[0094] S10, measuring the coating distance between the substrate on the coating roller and the coating die head;

[0095] S20, detecting the current rotation angle of the driving member, and determining the current reference size corresponding to the current rotation angle according to the rotation angle-reference size relationship table;

[0096] S30, calculating the current coating thickness according to the current reference size, the coating spacing and the preset substrate thickness;

[0097] S40, controlling the electric adjustment mechanism to operate according to the current coating thickness, so as to adjust the current coating thickness to a target coating thickness.

[0098] During normal coating, the size of the coated wet film (i.e. the coating spacing mentioned above) is measured and the thickness of the preset coated substrate and the back roller size data recorded in the calibration procedure are subtracted to obtain the accurate thickness data of the wet film at the current position for use in adjusting the coating thickness by the electric adjustment mechanism.

[0099] In other words, in step S30, the coating thickness is defined as d, the coating interval is defined as a, the current reference size is defined as b, and the preset substrate thickness is defined as c, which satisfies the relationship: d=abc.

[0100] It should be noted that the response time of the laser displacement sensor used in the present invention is about 1ms, and the intelligent closed-loop control system can obtain measured thickness data every millisecond, which can greatly improve the coverage of thickness sampling, reduce the data sampling response time, and control the electric adjustment mechanism to process thickness changes at a millisecond response speed, which can effectively improve the control accuracy of coating thickness and help to further improve the consistency of coating.

[0101] In this embodiment, the working process of the coating device can be simplified as follows: 1. Start the coating system; 2. Thickness measurement (millisecond multi-channel sampling); 3. Calculation (millisecond calculation processing capability); 4. Adjust output (quick start adjustment).

[0102] During the adjustment process, the thickness measurement data is continuously measured, and the relationship between the adjustment position and the thickness change is analyzed. The adjustment parameters are adjusted in real time according to the changes in thickness and position to achieve the goal of high-speed intelligent adjustment.

[0103] Furthermore, in one embodiment, before step S10, the following steps are further included:

[0104] S07, when the substrate is not wound around the coating roller, controlling the driving member to drive the coating roller to rotate;

[0105] S08, detecting and recording the reference dimensions between each position on the coating roller surface and the coating die head at different rotation angles of the driving member;

[0106] S09, associating the rotation angle with the corresponding rotation angle to obtain the rotation angle-reference dimension relationship table.

[0107] In this embodiment, after the coating die head is installed on the coating device, the reference size of the coating back roller can be detected through a calibration program, and associated with the position recorded by the encoder on one side of the back roller, and the dimensions of the back roller at different circumferential positions (i.e., the above-mentioned rotation angle-reference size relationship table) can be stored in the control system.

[0108] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A coating die head (100), characterized in that: include: A first die head (10); A second die head (20) is connected and fixed to the first die head (10), and a gasket (40) is sandwiched between the first die head (10) and the second die head (20) to form a coating slit; the second die head (20) is provided with a feed port and a coating dispensing cavity (20a) connected to the feed port, and the coating dispensing cavity (20a) is connected to the coating slit; as well as A plurality of thickness measuring components (30) are arranged at intervals on the first die head (10) or the second die head (20), and each of the thickness measuring components (30) is suitable for being arranged downstream of a backing roller component to measure the thickness of a coating applied on a substrate (1).

2. The coating die head (100) according to claim 1, characterized in that: The thickness measuring assembly (30) comprises: A laser sensor (31), the first die head (10) is provided with a mounting hole for mounting the laser sensor (31), and the laser sensor (31) is suitable for signal connection with a control component; and A light-transmitting member (32) is mounted on the end of the mounting hole and is located on the monitoring path of the laser sensor (31); or the light-transmitting member (32) and the laser sensor (31) are integrally formed.

3. The coating die head (100) according to claim 2, characterized in that: The thickness measuring assembly (30) further comprises: A position adjustment member (33) is provided on the first die head (10) and is connected to the laser sensor (31) so as to adjust the position of the laser sensor (31).

4. The coating die head (100) according to claim 3, characterized in that: The first die head (10) is further provided with a sealing cover (34), the sealing cover (34) being arranged on the mounting hole, and the sealing cover (34) being provided with a wire passing hole for a signal wire (312) of the laser sensor (31) to pass through.

5. The coating die head (100) according to claim 1, characterized in that: At least one die is arranged between the first die (10) and the second die (20) to form at least two coating slits.

6. The coating die head (100) according to claim 1, characterized in that: The first die head (10) is provided with a receiving groove, and the coating slit is connected to the receiving groove; The coating die (100) further comprises: An electric adjustment mechanism (50) is inserted into the accommodating groove and extends into the coating slit. The electric adjustment mechanism (50) is suitable for being connected to a control component signal to adjust the discharge amount of the coating slit.

7. The coating die head (100) according to claim 6, characterized in that: The number of the electric adjustment mechanisms (50) is plural, and the plural electric adjustment mechanisms (50) are inserted into the accommodating groove; Each of the electric adjustment mechanisms (50) comprises a linear motor (51) and an adjustment block (52) drivingly connected to the linear motor (51); the adjustment block (52) extends into the coating slit to change the coating surface density.

8. A coating device, characterized in that: include: A back roller assembly (200) for driving a substrate (1) wound thereon to move; A coating die (100), wherein the coating die (100) is the coating die (100) according to any one of claims 1 to 7, and the coating die (100) is used for coating the slurry onto the substrate (1) on the backing roller assembly (200); as well as A control component is connected to the thickness measuring component (30) by signal, so as to control the operation of the coating die head (100) according to the coating thickness signal.

9. The coating device according to claim 8, characterized in that The coating die (100) is fixed on a die support (101); The back roller assembly (200) comprises: a coating roller (210), wherein the coating lip of the coating die head (100) is pressed against the coating roller (210) passing around the substrate (1), and the coating inside the coating roller is applied to the substrate (1); the coating roller (210) is fixed to the die head support (101) via a bearing; A driving member (220) is connected to the coating roller (210) in a driving manner and is connected to the control component in a signal manner; and An encoder (230), wherein the encoder (230) is fixed on the die head bracket (101), and the encoder (230) is connected to one end of the coating roller (210) via a coupling (240), and the encoder (230) is connected to the control component signal to detect the rotation angle of the driving member (220) and output the coating roller (210) position signal to the control component, and the control component is also used to control the operation of the coating die head (100) according to the coating roller (210) position signal.

10. A coating method, characterized in that: Based on the coating device according to claim 8 or 9, the coating method comprises the following steps: S10, measuring the coating distance between the substrate on the coating roller and the coating die head; S20, detecting the current rotation angle of the driving member, and determining the current reference size corresponding to the current rotation angle according to the rotation angle-reference size relationship table; S30, calculating the current coating thickness according to the current reference size, the coating spacing and the preset substrate thickness; S40, controlling the electric adjustment mechanism to operate according to the current coating thickness, so as to adjust the current coating thickness to a target coating thickness.

11. The coating method according to claim 10, characterized in that Before step S10, the method further includes: S07, when the substrate is not wound around the coating roller, controlling the driving member to drive the coating roller to rotate; S08, detecting and recording the reference dimensions between each position on the coating roller surface and the coating die head at different rotation angles of the driving member; S09, associating the rotation angle with the corresponding rotation angle to obtain the rotation angle-reference dimension relationship table.

12. The coating method according to claim 10, characterized in that In step S30, the coating thickness is defined as d, the coating interval is defined as a, the current reference size is defined as b, and the preset substrate thickness is defined as c, which satisfies the relationship: d=abc.

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