A calibration method, system and coating equipment

Abstract

The present invention discloses a calibration method, system and coating equipment. The calibration method includes: placing a standard block between each coating hole and the corresponding mask roller, and facing the first surface of the standard block to the coating hole, and facing the second surface of the standard block to the mask roller; making the highest point of the mask roller directly below the standard block, adjusting the posture of the mask roller so that the distance between the highest point of each mask roller and the corresponding second surface is equal to the second preset value; adjusting the posture of the coating head so that the distance between each coating hole and the corresponding first surface is equal to the third preset value; removing the standard block, and moving the coating head downward by the thickness of the standard block, so that the distance between each coating hole and the highest point of the corresponding mask roller is the first preset value. The present invention can quickly adjust the posture of the mask roller and the coating head so that the distance between each coating hole and the mask roller reaches the preset first preset value.

Description

Technical Field

[0001] The present invention relates to the field of calibration technology, and in particular to a calibration method, system and coating equipment. Background Art

[0002] In the fields of solar cells, electronic display panels, functional films, etc., slit coating technology is favored for its high precision, high uniformity and high efficiency. As a key tool to realize this technology, the accuracy and stability of the coating head, the core component of slit coating equipment, are crucial to the coating quality. However, in actual applications, the relative position relationship between the coating head and the mask roller (also known as the template roller, which is one of the components in the slit coating equipment, usually with a specific pattern or shape, used to mask or cover specific areas on the substrate during the coating process, thereby accurately controlling the coating range and shape of the coating.) is often difficult to accurately control, which directly affects the thickness uniformity and accuracy of the coating layer.

[0003] Traditional coating equipment calibration methods mostly rely on manual operation and simple measuring tools, which have problems such as complex operation, low precision, and poor repeatability. These problems are particularly prominent when dealing with coating tasks with multiple coating holes and high precision requirements. In addition, due to the lack of a fixed and stable calibration reference, a slight position deviation between the coating head and the mask roller may lead to a significant decrease in coating quality.

[0004] To solve this problem, the industry has begun to explore more accurate and efficient calibration methods. However, most existing calibration methods can only calibrate a single coating hole, and often ignore the overall coordination and parallelism requirements between the coating head and the mask roller. As a result, in actual applications, even if the calibration accuracy of a single coating hole is high, the overall coating quality is still difficult to guarantee.

[0005] Therefore, the present application proposes a calibration method, system and coating equipment. Summary of the invention

[0006] The object of the present invention is to provide a calibration method, system and coating equipment, which can simplify the operation process, reduce the difficulty of operation, and quickly adjust the posture of the mask roller and the coating head so that the distance between each coating hole and the mask roller reaches a preset first preset value.

[0007] The purpose of the present invention is achieved by the following technical solutions:

[0008] In a first aspect, the present invention provides a calibration method, which is applicable to the calibration of a coating head, wherein at least two coating holes are provided on the coating head, and a mask roller is provided under each coating hole, and the calibration method comprises the following steps:

[0009] A standard block is placed between each coating hole and the corresponding mask roller, and the first surface of the standard block is facing the coating hole, and the second surface of the standard block is facing the mask roller, wherein the first surface and the second surface are arranged opposite to each other;

[0010] The highest point of the mask roller is located directly below the standard block, and the position of the mask roller is adjusted so that the distance between the highest point of each mask roller and the corresponding second surface is equal to a second preset value;

[0011] Adjusting the posture of the coating head so that the distance between each coating hole and the corresponding first surface is equal to a third preset value;

[0012] The standard block is removed, and the coating head is moved downward by a distance equal to the thickness of the standard block, so that the distance between each coating hole and the highest point of the corresponding mask roller is the first preset value.

[0013] The beneficial effects of the above scheme are as follows: through the use of standard blocks, the operation process can be simplified, the operation difficulty can be reduced, and the posture of the mask roller and the coating head can be quickly adjusted so that the distance between each coating hole and the mask roller reaches a preset first preset value, which significantly reduces the error in the subsequent coating process and improves the coating accuracy and consistency.

[0014] Furthermore, the step of making the distance between each coating hole and the highest point of the corresponding mask roller equal to a first preset value includes:

[0015] After removing the standard block and moving the coating hole downward by using the second lifting device, the distance between the coating hole and the highest point of the mask roller is measured, and the size relationship between the distance between the coating hole and the highest point of the mask roller and the first preset value is compared;

[0016] When the distance between the coating hole and the highest point of the mask roller is not equal to the first preset value, the posture of the mask roller and the coating head is corrected so that the distance between each coating hole and the corresponding highest point of the mask roller is the first preset value.

[0017] The beneficial effect of the above scheme is that the present invention can timely discover and correct the deviation by comparing the difference between the actual distance and the first preset value, thereby ensuring the precise distance between the coating hole and the mask roller, thereby improving the stability and reliability of the coating quality.

[0018] Furthermore, the correction of the posture of the mask roller and the coating head includes:

[0019] According to the difference between D1 and the first preset value, the mask roller is adjusted by using the second lifting device and the second leveling device;

[0020] According to the difference between D1 and the first preset value, the coating head is adjusted by using the third lifting device and the third leveling device;

[0021] Record the coating hole and mask roller posture parameters before and after each adjustment, as well as the adjustment amount of the adjustment device, to form a calibration log;

[0022] Wherein, D1 is the distance between the coating hole and the highest point of the mask roller.

[0023] The beneficial effects of the above scheme are as follows: the present invention not only performs posture correction, but also records the position and adjustment amount before and after each adjustment to form a calibration log, which helps to track and adjust the process, improve the accuracy and traceability of calibration, and also provides valuable data support for subsequent equipment maintenance and optimization.

[0024] Furthermore, the posture correction of the mask roller and the coating head also includes:

[0025] Based on the calibration log, according to the difference between D1 and the first preset value, the mask roller is adjusted using the second lifting device and the second leveling device;

[0026] Based on the calibration log, the coating head is adjusted using the third lifting device and the third leveling device according to the difference between D1 and the first preset value.

[0027] The beneficial effect of the above scheme is that the present invention uses the data in the calibration log to perform more accurate and efficient posture correction. By referring to historical data, the best adjustment scheme can be found more quickly, reducing adjustment time and cost.

[0028] Furthermore, the first preset value is less than or equal to the sum of the second preset value and the third preset value.

[0029] Beneficial effect of the above solution: the present invention limits the first preset value to be less than or equal to the sum of the second preset value and the third preset value, thereby ensuring a reasonable distance between the coating hole and the mask roller.

[0030] Furthermore, the method of making the distance between each coating hole and the highest point of the corresponding mask roller equal to a first preset value further includes:

[0031] After the standard block is removed and the coating head is moved downward, the mask roller is replaced by the substrate to be coated, and the distance between the coating hole and the substrate to be coated is detected, and the size relationship between the distance between the coating hole and the substrate to be coated and the fourth preset value is compared;

[0032] When the distance between the coating hole and the substrate to be coated is not equal to the fourth preset value, the posture of the coating head is corrected so that the distance between each coating hole and the corresponding substrate to be coated is the fourth preset value.

[0033] The beneficial effects of the above scheme are as follows: the present invention replaces the mask roller with the substrate to be coated, detects the distance between the coating hole and the substrate to be coated, and performs correction to ensure the accurate distance between the coating hole and the substrate to be coated, thereby improving the coating accuracy and consistency. At the same time, it also provides more accurate parameter settings for the coating operation in actual production.

[0034] Furthermore, the fourth preset value includes the following formula:

[0035] A4=A2+A3+(H1-H2);

[0036] A4>0;

[0037] Among them, A4 is the fourth preset value, A2 is the second preset value, A3 is the third preset value, H1 is the height of the mask roller, and H2 is the height of the substrate to be coated.

[0038] Beneficial effects of the above solution: The present invention takes into account the height difference between the mask roller and the substrate to be coated, and ensures a reasonable distance between the coating hole and the substrate.

[0039] Furthermore, after replacing the mask roller with the substrate to be coated, the method further comprises:

[0040] Detecting the parallelism between the substrate to be coated and the coating head, and comparing the relationship between the parallelism and a preset threshold;

[0041] When the parallelism is not equal to the preset threshold, the posture of the substrate to be coated is adjusted so that the parallelism between the substrate to be coated and the coating head is equal to the preset threshold.

[0042] Beneficial effects of the above scheme: The present invention helps to improve coating accuracy and uniformity, reduce coating problems caused by equipment deviation, and ensure the stability and consistency of coating operations by detecting the parallelism between the substrate to be coated and the coating head and making adjustments.

[0043] In a second aspect, the present invention further provides a calibration system, which is suitable for calibrating a coating head, wherein at least two coating holes are provided on the coating head, and a mask roller is provided under each coating hole, and the calibration system comprises:

[0044] An initialization module, used for placing a standard block between each coating hole and the corresponding mask roller, and placing a first surface of the standard block toward the coating hole and a second surface of the standard block toward the mask roller, wherein the first surface and the second surface are arranged opposite to each other;

[0045] A mask roller adjustment module, used to make the highest point of the mask roller be located directly below the standard block, and to adjust the posture of the mask roller so that the distance between the highest point of each mask roller and the corresponding second surface is equal to a second preset value;

[0046] A coating head adjustment module, used for adjusting the position and posture of the coating head so that the distance between each coating hole and the corresponding first surface is equal to a third preset value;

[0047] The calibration module is used to remove the standard block and move the coating head downward by a distance equal to the thickness of the standard block, so that the distance between each coating hole and the highest point of the corresponding mask roller is the first preset value.

[0048] The beneficial effects of the above scheme: the present invention can accurately adjust the positional relationship between the coating head and the mask roller through the coordinated work of the initialization module, the mask roller adjustment module, the coating head adjustment module and the calibration module, thereby realizing automatic calibration of the coating head and reducing labor costs and time costs.

[0049] In a third aspect, the present invention provides a coating device for a calibration system, wherein the calibration system is the calibration system described above;

[0050] The coating device comprises a processor, a memory and a calibration control program stored in the memory, and the processor executes the calibration control program to implement the steps of the above calibration method.

[0051] The beneficial effects of the above scheme are as follows: the present invention executes the calibration control program through the processor, which not only realizes the precise calibration of the coating head, but also reduces the operation difficulty and labor cost.

[0052] Compared with the prior art, the beneficial effects of the present invention include at least:

[0053] The present invention simplifies the operation process, reduces the difficulty of operation, and realizes rapid adjustment of the posture of the mask roller and the coating head through the use of standard blocks, so that the distance between each coating hole and the mask roller reaches a preset first preset value, significantly reducing errors in subsequent coating processes and improving coating accuracy and consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a flow chart of a calibration method according to an embodiment of the present invention.

[0055] Figure 2 4 is another flow chart of the calibration method according to the embodiment of the present invention.

[0056] Figure 3 4 is a top view of the calibration device according to an embodiment of the present invention.

[0057] Figure 4 It is a side view of the calibration device according to the embodiment of the present invention.

[0058] Figure 5 It is a structural schematic diagram of the first bracket of an embodiment of the present invention.

[0059] Figure 6 It is a structural schematic diagram of the positional relationship between the coating head and the mask roller in an embodiment of the present invention.

[0060] In the figure: 1. standard block; 2. base; 21. side; 22. top; 23. bottom; 24. mounting hole; 3. adjustment assembly; 31. adjustment assembly; 311. adjustment screw; 32. leveling assembly; 321. leveling screw; 51. first bracket; 511. first ear; 512. second ear; 513. groove structure; 52. second bracket; 6. coating head; 61. coating hole; 71. first sensor; 72. second sensor; 8. mask roller. DETAILED DESCRIPTION

[0061] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete and to fully convey the concepts of example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0062] The words expressing positions and directions described in the present invention are all explained with reference to the accompanying drawings as examples, but they can be changed as needed, and all such changes are included in the protection scope of the present invention.

[0063] The thickness and uniformity of the coating layer are not only related to the flow rate of the coating liquid, the temperature of the coating liquid and the flatness of the coating slit, but also to the calibration accuracy of the coating head 6 and the mask roller 8. However, accurate calibration of the coating head 6 and the mask roller 8 is a prerequisite for ensuring that the thickness and uniformity of the coating layer meet the requirements. The coating head 6 of the present invention has a plurality of coating holes 61, and mask rollers 8 are arranged under these coating holes 61. In order to ensure that the distance between each coating hole 61 and the corresponding mask roller 8 meets the predetermined requirements, thereby improving the accuracy, uniformity and efficiency of the coating, the present invention introduces a calibration method, system and coating equipment. Among them, the coating equipment is a slit coating equipment. The calibration method of the present invention is suitable for the calibration of the coating head 6, and the coating head 6 is provided with at least two coating holes 61, and a mask roller 8 is arranged under each coating hole 61. For details, refer to Figure 1 , the calibration method of the present invention comprises steps S1 to S4.

[0064] Step S1: placing a standard block 1 between each coating hole 61 and the corresponding mask roller 8, with the first surface of the standard block 1 facing the coating hole 61 and the second surface of the standard block 1 facing the mask roller 8, wherein the first surface and the second surface are arranged opposite to each other.

[0065] When applied, prepare the same number of standard blocks 1 as the coating holes 61, and place each standard block 1 between the corresponding coating hole 61 and the mask roller 8. In addition, the thickness of each standard block 1 should be accurate and consistent to ensure the accuracy of calibration. Specifically, the size of the standard block 1 can be pre-calibrated to ensure that the thickness between the first surface and the second surface of the standard block 1 is uniform and meets the preset standard. Use a high-precision measuring tool to measure the thickness of the standard block 1, and record the measured value so that the relative position adjustment between the coating hole 61 and the mask roller 8 can be accurately calculated during the calibration process.

[0066] In actual application, the coating head 6 is fixed on the gantry crane, and the standard block 1 is placed on a calibration device to provide a calibration reference surface. Step S2: The highest point of the mask roller 8 is located directly below the standard block 1, and the posture of the mask roller 8 is adjusted so that the distance between the highest point of each mask roller 8 and the corresponding second surface is equal to the second preset value.

[0067] During application, a measuring tool, such as a micrometer, a laser rangefinder or a contact measuring sensor, is used to check whether the highest point of the mask roller 8 is located directly below the standard block 1. If not, the support structure or driving mechanism of the mask roller 8 is adjusted so that the highest point of the mask roller 8 is located directly below the standard block 1. Next, the height and / or tilt angle of the mask roller 8 are finely adjusted so that the distance between the highest point of each mask roller 8 and the corresponding second surface of the standard block 1 is equal to the second preset value.

[0068] In practical application, the position parameters of the mask roller 8 and the adjustment amount of the adjustment device before and after each adjustment can be recorded and written into the calibration log of the mask roller 8. Then, the adjustment parameters are optimized according to the calibration log to improve the adjustment efficiency.

[0069] Step S3: adjusting the position and posture of the coating head 6 so that the distance between each coating hole 61 and the corresponding first surface is equal to a third preset value.

[0070] When applied, a measuring tool, such as a micrometer, a laser rangefinder or a contact measuring sensor, is used to measure the distance between each coating hole 61 and the corresponding first surface of the standard block 1. If the distance is not equal to the third preset value, the support structure or the driving mechanism of the coating head 6 is adjusted to adjust the height and / or the tilt angle of the coating head 6 until the distance between each coating hole 61 and the corresponding first surface of the standard block 1 is equal to the third preset value.

[0071] Step S4: remove the standard block 1 and move the coating head 6 downward by a distance equal to the thickness of the standard block 1, so that the distance between each coating hole 61 and the highest point of the corresponding mask roller 8 is a first preset value, wherein the first preset value is less than or equal to the sum of the second preset value and the third preset value.

[0072] When applied, in step S4, making the distance between each coating hole 61 and the highest point of the corresponding mask roller 8 the first preset value includes steps S411-S412, or steps S421-S422. In addition, when in step S4, making the distance between each coating hole 61 and the highest point of the corresponding mask roller 8 the first preset value includes steps S421-S422, further, steps S423-S424 may be included.

[0073] Step S411: remove the standard block 1, and use the second lifting device to move the coating hole 61 downward, measure the distance between the coating hole 61 and the highest point of the mask roller 8, and compare the distance between the coating hole 61 and the highest point of the mask roller 8 with the first preset value.

[0074] When used, a measuring tool is used to measure the distance between each coating hole 61 and the corresponding highest point of the mask roller 8, and the size relationship between the measurement result and the first preset value is compared to determine whether further adjustment is required. If the measurement result is equal to the first preset value, no further adjustment is required; if the measurement result is not equal to the first preset value, further adjustment is required.

[0075] Step S412: When the distance between the coating hole 61 and the highest point of the mask roller 8 is not equal to the first preset value, correct the posture of the mask roller 8 and the coating head 6 so that the distance between each coating hole 61 and the corresponding highest point of the mask roller 8 is the first preset value.

[0076] When used, first check whether the second lifting device has accurately moved the coating head 6 down to the predetermined position. If the second lifting device is wrong, make fine adjustments. If the second lifting device is correct, check the posture of the mask roller 8. By adjusting the support structure or drive mechanism of the mask roller 8, fine-tune the height and / or tilt angle of the mask roller 8 so that the distance between each coating hole 61 and the highest point of the corresponding mask roller 8 is close to or equal to the first preset value. If the distance between each coating hole 61 and the highest point of the corresponding mask roller 8 cannot be the first preset value by adjusting the mask roller 8, further adjust the posture of the coating head 6. By adjusting the support structure or drive mechanism of the coating head 6, fine-tune the position and / or tilt angle of the coating head 6. So that the distance between each coating hole 61 and the highest point of the corresponding mask roller 8 is closer to or even equal to the first preset value. When adjusting the posture of the mask roller 8 and the coating head 6, the principle of small step fast adjustment should be followed, that is, the adjustment amount each time should not be too large, so as to reach the predetermined position faster.

[0077] In actual application, in step S412, calibrating the posture of the mask roller 8 and the coating head 6 includes: step S4121-step S4123, or step S4124-step S4125.

[0078] When calibrating the coating head 6 for the first time, steps S4121 to S4123 may be used to calibrate the positions of the mask roller 8 and the coating head 6 .

[0079] Step S4121 : according to the difference between D1 and the first preset value, the mask roller 8 is adjusted by using the second lifting device and the second leveling device; wherein D1 is the distance between the coating hole 61 and the highest point of the mask roller 8 .

[0080] When in use, the second lifting device is used to adjust the height of the mask roller 8 ; the second leveling device is used to adjust the inclination angle of the mask roller 8 to ensure that it is parallel to the coating head 6 .

[0081] In actual application, the amount to be adjusted is determined according to the difference between D1 and the first preset value, and the height of the mask roller 8 is adjusted by the second lifting device so that the highest point of the mask roller 8 moves upward or downward to approach the first preset value. At the same time, the inclination angle of the mask roller 8 is adjusted by the second leveling device to ensure that it remains parallel to the coating head 6. After adjustment, D1 is measured again to confirm whether it has reached the first preset value or is close to an acceptable range.

[0082] Step S4122: according to the difference between D1 and the first preset value, the coating head 6 is adjusted by using the third lifting device and the third leveling device.

[0083] When in use, the third lifting device is used to adjust the height of the coating head 6 ; the third leveling device is used to adjust the inclination angle of the coating head 6 to ensure that it is parallel to the mask roller 8 .

[0084] In actual application, if D1 still does not reach the first preset value after adjustment in step S4121, the coating head 6 is adjusted. Specifically, the amount to be adjusted is determined according to the difference between D1 and the first preset value, and the height of the coating head 6 is adjusted by the third lifting device to move the coating hole 61 upward or downward so that D1 is closer to the first preset value. At the same time, the third leveling device is used to adjust the inclination angle of the coating head 6 to ensure that it remains parallel to the mask roller 8. After adjustment, D1 is measured again to confirm whether it has reached the first preset value.

[0085] Step S4123: Record the position parameters of the coating hole 61 and the mask roller 8 before and after each adjustment and the adjustment amount of the adjustment device to form a calibration log.

[0086] When applied, the posture parameters include height and tilt angle. Record the adjustment amounts of the second lifting device, the second leveling device, the third lifting device, and the third leveling device.

[0087] When calibrating the coating head 6 for the Nth time, steps S4124 and S4125 may be used to calibrate the postures of the mask roller 8 and the coating head 6, where N is greater than 1.

[0088] Step S4124: Based on the calibration log, according to the difference between D1 and the first preset value, the mask roller 8 is adjusted by using the second lifting device and the second leveling device.

[0089] When applying, first, check the previous calibration log to understand the historical data of the distance (D1) between the coating hole 61 and the mask roller 8 and the previous adjustment records. Then, according to the difference between the currently measured D1 value and the first preset value, analyze the direction and amount of adjustment of the mask roller 8. If D1 is greater than the first preset value, it means that the mask roller 8 needs to be adjusted upward; if D1 is less than the first preset value, it means that the mask roller 8 needs to be adjusted downward. Then, use the second lifting device to adjust the height of the mask roller 8 according to the analyzed adjustment amount. At the same time, use the second leveling device to ensure that the mask roller 8 remains parallel to the coating head 6 after adjustment, which can be achieved using a special leveling tool. After the adjustment is completed, measure the D1 value again.

[0090] Step S4125: Based on the calibration log, according to the difference between D1 and the first preset value, the coating head 6 is adjusted by using the third lifting device and the third leveling device.

[0091] During application, if the D1 value still does not reach the first preset value after adjustment in step S4124, the coating head 6 needs to be adjusted. According to the difference between the re-measured D1 value and the first preset value, the direction and amount of adjustment of the coating head 6 are analyzed. Then, the height of the coating head 6 is adjusted according to the analyzed adjustment amount using the third lifting device. At the same time, the third leveling device is used to ensure that the coating head 6 remains parallel to the mask roller 8 after adjustment. After the adjustment is completed, the D1 value is measured again to ensure that the difference between it and the first preset value is within an acceptable range. If there is still a deviation, repeat step S4125 until the requirement is met.

[0092] In actual application, after each adjustment of the mask roller 8 and the coating head 6, the calibration log is updated to record the new coating hole 61, the position parameters of the mask roller 8 and the adjustment amount of the adjustment device.

[0093] Step S421: After removing the standard block 1 and moving the coating head 6 downward, replace the mask roller 8 with the substrate to be coated, detect the distance between the coating hole 61 and the substrate to be coated, and compare the distance between the coating hole 61 and the substrate to be coated with the fourth preset value.

[0094] When applied, the coating hole 61 is moved downward by the second lifting device. In addition, the fourth preset value includes: A4=A2+A3+(H1-H2), and A4>0. Among them, A4 is the fourth preset value, A2 is the second preset value, A3 is the third preset value, H1 is the height of the mask roller 8, and H2 is the height of the substrate to be coated.

[0095] Step S422: when the distance between the coating hole 61 and the substrate to be coated is not equal to the fourth preset value, correct the posture of the coating head 6 so that the distance between each coating hole 61 and the corresponding substrate to be coated is the fourth preset value.

[0096] When in use, the coating head 6 is adjusted using the third lifting device and the third leveling device. The third lifting device is used to fine-tune the height of the substrate to be coated; the third leveling device is used to adjust the tilt angle of the coating head 6 to ensure that it is horizontal or parallel to the substrate to be coated.

[0097] Step S423: After replacing the mask roller 8 with the substrate to be coated, detecting the parallelism between the substrate to be coated and the coating head 6, and comparing the relationship between the parallelism and a preset threshold.

[0098] When applied, a parallelism measuring instrument is used to detect the parallelism between the substrate to be coated and the coating head 6. If the parallelism is equal to a preset threshold, no adjustment is required; if the parallelism is not equal to the preset threshold, further adjustment is required.

[0099] Step S424: when the parallelism is not equal to the preset threshold, the posture of the substrate to be coated is adjusted so that the parallelism between the substrate to be coated and the coating head 6 is equal to the preset threshold.

[0100] When in use, the fourth lifting device and the fourth leveling device are used to adjust the substrate to be coated. The fourth lifting device is used to fine-tune the height of the substrate to be coated; the fourth leveling device is used to adjust the tilt angle of the coating head 6 to ensure that it is horizontal or parallel to the substrate to be coated.

[0101] In practical applications, the adjusted substrate to be coated can also be positioned and calibrated to ensure that the substrate to be coated is in a predetermined position and accurately positioned relative to the coating head 6. For example, the edge or specific mark of the substrate to be coated is detected by a positioning sensor, and the position of the substrate to be coated is adjusted according to the detection result until the preset positioning accuracy is reached.

[0102] Preferably, reference Figure 6 After the above static calibration is completed, the first sensor 71 and the second sensor 72 are removed, the coating liquid is injected into the coating head, and coating begins. In addition, during the coating process, dynamic calibration can also be performed: the temperature of the coating head 6 is monitored in real time, and the temperature control system is adjusted according to the temperature change to maintain the coating head 6 within a preset temperature range; through temperature control, the physical properties of the coating material such as viscosity and fluidity are ensured to remain stable, thereby improving the coating quality and calibration accuracy.

[0103] In summary, during the coating process, the distance between the coating hole 61 and the mask roller 8 or the substrate to be coated is very small and needs to be precisely controlled within the micron range. In order to calibrate the positions of multiple coating holes 61 and the corresponding mask roller 8 at the same time, avoid the knife head of the coating head 6 from colliding with the mask roller 8 during the calibration process to damage the coating head 6 and the mask roller 8, the present invention introduces a standard block 1 to perform multiple calibrations on the coating holes 61 and the mask roller 8 to achieve preliminary calibration, rough calibration and fine calibration of the coating holes 61 and the mask roller 8, thereby ensuring that the distance between each coating hole 61 and the corresponding mask roller 8 meets the predetermined requirements, thereby improving the accuracy, uniformity and efficiency of coating.

[0104] Since the existing coating workshop is equipped with a coating loop, in order to avoid increasing the load of the loop, avoid increasing the size of the loop, and ensure the portability of the loop, the above calibration method can also be implemented by the following calibration device. Figure 6 After using the calibration device for static calibration, remove the calibration device, inject the coating liquid into the coating head, and start coating.

[0105] The calibration device includes a base 2, a standard block 1, two sets of sensor components and an adjustment component 3. Figure 3 and Figure 4 The base 2 is arranged between the coating head 6 and the mask roller 8. The base 2 includes a side surface 21 and a top surface 22 and a bottom surface 23 that are arranged opposite to each other. The top surface 22 faces the coating head 6, and the top surface 22 is connected to the second surface of the standard block 1. The bottom surface 23 faces the mask roller 8. At least two mounting holes 24 are provided on the base 2.

[0106] Each set of sensor components includes a first bracket 51, a second bracket 52, a first sensor 71, a second sensor 72 and a third sensor, and all three sensors are cylinder-type displacement sensors. The first bracket 51 is used to install the first sensor 71, the second bracket 52 is used to install the second sensor 72, the first sensor 71 is used to detect the coordinates of the first surface, the second sensor 72 is used to detect the coordinates of the second surface, and the third sensor is used to detect the coordinates of the coating head 6. Figure 5, in order to stagger the installation heights of the first sensor 71 and the second sensor 72 in a limited space and thus expand the detection range of the sensor assembly, the first bracket 51 includes: a groove structure 513, a first ear 511 and a second ear 512. The groove structure 513 is arranged in the mounting hole 24, and one end of the groove structure 513 is connected to the first ear 511, and the other end of the groove structure 513 is connected to the second ear 512, and the first ear 511 and the second ear 512 are both connected to the top surface 22. A first fixing hole is provided at the bottom of the groove structure 513, and the first fixing hole is used to install the cylinder of the first sensor 71. In addition, the second bracket 52 includes: a convex groove structure, a third ear and a fourth ear. The convex groove structure is arranged in the mounting hole 24, and one end of the convex groove structure is connected to the third ear, and the other end of the convex groove structure is connected to the fourth ear, and the third ear and the fourth ear are both connected to the bottom surface 23. A second fixing hole is provided at the top of the convex groove structure, and the second fixing hole is used to install the cylinder of the second sensor 72.

[0107] The adjustment assembly 3 includes an adjustment assembly 31 and a leveling assembly 32. The adjustment assembly 31 includes an adjustment screw 311, which is connected to the side 21 to adjust the position of the base 2 so that the first sensor 71 corresponds to and detects the highest point of the mask roller 8. The leveling assembly 32 includes a plurality of leveling screws 321 connected to the base 2, and the plurality of leveling screws 321 are arranged in a triangle to ensure stability and leveling accuracy in three-dimensional space.

[0108] refer to Figure 2 The specific implementation steps of the calibration device may also include: step A-step J.

[0109] Step A: Place the standard block 1 on the base 2 and reset each sensor to zero. At the same time, ensure that the first sensor 71 detects the coordinates of the first surface and the second sensor 72 detects the coordinates of the second surface.

[0110] Step B: Place the calibration device between the coating head 6 and the mask roller 8, measure with a level meter, and adjust the leveling screw 321 to adjust the level of the standard block 1.

[0111] Step C: adjusting the position of the first sensor 71 above the mask roller 8 by adjusting the adjusting screw 311 to ensure that the first sensor 71 can measure the coordinates of the highest point of the mask roller 8 .

[0112] Step D: By adjusting the height of the mask roller 8, the coordinates of the highest point of the mask roller 8 detected by each first sensor 71 are equal. In application, the measured values ​​of each first sensor 71 are equal, for example, all are a. In actual application, at this time, the surface where the highest point of the mask roller 8 is located is parallel to the reference block.

[0113] Step E: Lower the coating head 6 to the vicinity of the first surface of the standard block 1 .

[0114] Step F: Use the second sensor 72 to measure the coordinates of the coating hole 61 on the coating head 6, and finely adjust the height of the coating head 6 so that the measured values ​​of each second sensor 72 are equal, for example, all are b. When applied, b=0.3mm. In actual application, the coating head 6 is parallel to the reference block at this time.

[0115] Step G: Use the third sensor to measure the coordinates of the standard block 1. When applied, the measured values ​​of each third sensor are equal, for example, all are c, to verify that the coating head 6 is parallel to the reference block.

[0116] Step H: Remove the calibration device, lower the coating head 6, and make the coating head 6 move down a distance equal to the thickness of the standard block 1. When used, the distance between the coating hole 61 and the highest point of the mask roller 8 is a+b.

[0117] Step I: Replace the mask roller 8 with the substrate to be coated, and adjust the substrate to be coated so that the height of the substrate to be coated is equal to the height of the highest point of the mask roller 8 .

[0118] Step J: adjusting the posture of the coating head 6 and the substrate to be coated so that the gap between the coating hole 61 and the substrate to be coated is a preset value.

[0119] The calibration system of the present invention is suitable for calibrating a coating head 6, wherein at least two coating holes 61 are formed on the coating head 6, and a mask roller 8 is disposed below each coating hole 61. Specifically, the calibration system comprises: an initialization module, a mask roller 8 adjustment module, a coating head 6 adjustment module, and a calibration module.

[0120] The initialization module is used to place a standard block 1 between each coating hole 61 and the corresponding mask roller 8, and the first surface of the standard block 1 is facing the coating hole 61, and the second surface of the standard block 1 is facing the mask roller 8, wherein the first surface and the second surface are arranged opposite to each other. The mask roller 8 adjustment module is used to make the highest point of the mask roller 8 directly below the standard block 1, and adjust the posture of the mask roller 8 so that the distance between the highest point of each mask roller 8 and the corresponding second surface is equal to the second preset value. The coating head 6 adjustment module is used to adjust the posture of the coating head 6 so that the distance between each coating hole 61 and the corresponding first surface is equal to the third preset value. The calibration module is used to remove the standard block 1 and move the coating head 6 downward by the thickness of the standard block 1, so that the distance between each coating hole 61 and the highest point of the corresponding mask roller 8 is the first preset value.

[0121] The coating apparatus of the present invention is used in the above-mentioned calibration system.

[0122] The coating device for calibration system of the present invention comprises a processor, a memory and a calibration control program stored in the memory, wherein the processor executes the calibration control program to implement the steps of the calibration method.

[0123] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, substitute and modify the above embodiments within the scope of the invention without departing from the principles and purpose of the present invention. All such changes should fall within the scope of protection of the claims of the present invention.

Claims

1. A calibration method, characterized in that: The calibration method is applicable to the calibration of a coating head, wherein at least two coating holes are provided on the coating head, and a mask roller is provided under each coating hole. The calibration method comprises the following steps: A standard block is placed between each coating hole and the corresponding mask roller, and the first surface of the standard block is facing the coating hole, and the second surface of the standard block is facing the mask roller, wherein the first surface and the second surface are arranged opposite to each other; The highest point of the mask roller is located directly below the standard block, and the position of the mask roller is adjusted so that the distance between the highest point of each mask roller and the corresponding second surface is equal to a second preset value; Adjusting the posture of the coating head so that the distance between each coating hole and the corresponding first surface is equal to a third preset value; The standard block is removed, and the coating head is moved downward by a distance equal to the thickness of the standard block, so that the distance between each coating hole and the highest point of the corresponding mask roller is the first preset value.

2. The calibration method according to claim 1, characterized in that: The method of making the distance between each coating hole and the highest point of the corresponding mask roller equal to a first preset value comprises: After removing the standard block and moving the coating hole downward by using the second lifting device, the distance between the coating hole and the highest point of the mask roller is measured, and the size relationship between the distance between the coating hole and the highest point of the mask roller and the first preset value is compared; When the distance between the coating hole and the highest point of the mask roller is not equal to the first preset value, the posture of the mask roller and the coating head is corrected so that the distance between each coating hole and the corresponding highest point of the mask roller is the first preset value.

3. The calibration method according to claim 2, characterized in that: The posture correction of the mask roller and the coating head includes: According to the difference between D1 and the first preset value, the mask roller is adjusted by using the second lifting device and the second leveling device; According to the difference between D1 and the first preset value, the coating head is adjusted by using the third lifting device and the third leveling device; Record the coating hole and mask roller posture parameters before and after each adjustment, as well as the adjustment amount of the adjustment device, to form a calibration log; Wherein, D1 is the distance between the coating hole and the highest point of the mask roller.

4. The calibration method according to claim 3, characterized in that: The posture correction of the mask roller and the coating head also includes: Based on the calibration log, according to the difference between D1 and the first preset value, the mask roller is adjusted using the second lifting device and the second leveling device; Based on the calibration log, the coating head is adjusted using the third lifting device and the third leveling device according to the difference between D1 and the first preset value.

5. The calibration method according to claim 2, characterized in that: The first preset value is less than or equal to the sum of the second preset value and the third preset value.

6. The calibration method according to claim 1, characterized in that: The method of making the distance between each coating hole and the highest point of the corresponding mask roller equal to a first preset value further includes: After the standard block is removed and the coating head is moved downward, the mask roller is replaced by the substrate to be coated, and the distance between the coating hole and the substrate to be coated is detected, and the size relationship between the distance between the coating hole and the substrate to be coated and the fourth preset value is compared; When the distance between the coating hole and the substrate to be coated is not equal to the fourth preset value, the posture of the coating head is corrected so that the distance between each coating hole and the corresponding substrate to be coated is the fourth preset value.

7. The calibration method according to claim 6, characterized in that: The fourth preset value includes the following formula: A4=A2+A3+(H1-H2); A4＞0； Among them, A4 is the fourth preset value, A2 is the second preset value, A3 is the third preset value, H1 is the height of the mask roller, and H2 is the height of the substrate to be coated.

8. The calibration method according to claim 6, characterized in that: After replacing the mask roller with the substrate to be coated, the method further comprises: Detecting the parallelism between the substrate to be coated and the coating head, and comparing the relationship between the parallelism and a preset threshold; When the parallelism is not equal to the preset threshold, the posture of the substrate to be coated is adjusted so that the parallelism between the substrate to be coated and the coating head is equal to the preset threshold.

9. A calibration system, characterized in that: The calibration system is suitable for calibrating a coating head, wherein at least two coating holes are provided on the coating head, and a mask roller is provided under each coating hole. The calibration system comprises: An initialization module, used for placing a standard block between each coating hole and the corresponding mask roller, and placing a first surface of the standard block toward the coating hole and a second surface of the standard block toward the mask roller, wherein the first surface and the second surface are arranged opposite to each other; A mask roller adjustment module, used to make the highest point of the mask roller be located directly below the standard block, and to adjust the posture of the mask roller so that the distance between the highest point of each mask roller and the corresponding second surface is equal to a second preset value; A coating head adjustment module, used for adjusting the posture of the coating head so that the distance between each coating hole and the corresponding first surface is equal to a third preset value; The calibration module is used to remove the standard block and move the coating head downward by a distance equal to the thickness of the standard block, so that the distance between each coating hole and the highest point of the corresponding mask roller is the first preset value.

10. A coating device for a calibration system, characterized in that: The calibration system is the calibration system according to claim 9; The coating device comprises a processor, a memory and a calibration control program stored in the memory, and the processor executes the calibration control program to implement the steps of the calibration method according to any one of claims 1 to 8.

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