Micro-gravure coating blade coating device and blade coating method

Abstract

The device comprises a support, a Y-direction movable sliding table and an X-direction movable sliding table are arranged on the support, a through hole long shaft is connected between the two sliding tables, a scraper blade is installed in the through hole long shaft, and coating is achieved by matching with a coating roller, a pressing roller and a glue groove which are arranged in parallel. The method comprises the steps that the scraper blade is adjusted to make contact with the coating roller through the double-shaft sliding table, the digital displacement and stress sensor collects data and transmits the data to the computer, parameters are recorded according to the rotation period of the coating roller, threshold values are set, and when the parameters break through, the sliding table is driven through the lead screw till the data are stable. Micron-scale positioning of the scraper blade is achieved through segmented adjustment of the double-shaft sliding table and the lead screw, closed-loop control is formed by the sensor and the computer, the problems of extensive traditional pneumatic adjustment and the like are solved, fluctuation of the thickness of an adhesive layer is reduced, and the uniformity and yield of high-precision coated products are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of scraping equipment, and in particular relates to a micro-concave coating scraping device and a micro-concave coating scraping method. Background Art

[0002] In coating equipment, the coating scraping unit device is the core of the coating product production equipment. The stability of the scraper unit of the coating equipment during the scraping process determines the uniformity of the film thickness of the coated product. The stability of the scraper unit directly determines the uniformity of the film thickness of the coated product. The existing technology mostly uses cylinder pressure to drive the scraper, which has problems such as complex pneumatic control structure, poor stability caused by air source fluctuation, debugging relying on manual experience, lack of real-time data monitoring, etc., and it is difficult to meet the precision requirements of high-performance coating products such as optical films and lithium battery electrodes. Therefore, there is an urgent need for a scraping device and scraping method with a simple structure, precise control and intelligent monitoring function to achieve visual control and efficient debugging of the scraping process. Summary of the Invention

[0003] The first purpose of the present invention is to provide a micro-concave coating scraping device, which solves the technical problem of poor stability caused by the complex pneumatic control structure and air source fluctuation in the prior art using a cylinder pressurized to drive the scraper.

[0004] A second object of the present invention is to provide a micro-dimpled coating blade coating method.

[0005] The first technical solution adopted by the present invention is a micro-concave coating and scraping device, including a support M and a support G, both of which are provided with a Y-direction movable slide, and an X-direction movable slide is provided on the top surface of the Y-direction movable slide, and a through-hole long axis is provided between the two X-direction movable slides, and a scraper blade is provided in the through-hole long axis; it also includes a coating roller and two pressing rollers arranged parallel to the through-hole long axis; the coating roller is located at the bottom between the two pressing rollers, the through-hole long axis is flush with the height of the coating roller, a glue groove is provided at the bottom of the coating roller, and glue liquid is provided in the glue groove, and the coating roller is partially immersed in the glue liquid.

[0006] The first technical solution of the present invention is also characterized in that: The end of the coating roller is connected to a coating roller transmission mechanism, and slide rails are installed on the support M and the support G, and the two pressure rollers are installed between the two slide rails.

[0007] Digital displacement sensors are installed next to the sliding guide rails of the Y-axis moving slide and the X-axis moving slide respectively, and stress sensors are symmetrically embedded on the contact surfaces of the upper back plate, the lower back plate and the long axis of the through hole. The digital displacement sensors and stress sensors are connected to the computer through data cables.

[0008] The stress sensor is a sheet structure, which is respectively nested between the top of the upper back plate and the top surface of the inner wall of the long axis of the through hole, and between the bottom of the lower back plate and the bottom surface of the inner wall of the long axis of the through hole, and the sensing surface of the stress sensor is completely in contact with the contact surfaces of the upper back plate and the lower back plate.

[0009] The middle part of the two X-axis movable slides is connected to the through-hole long axis through the guide roller support M and the guide roller support G. The two ends of the through-hole long axis are rotatably connected to the guide roller support M and the guide roller support G through the shaft. The two ends of the through-hole long axis are sleeved on the middle part of the shaft and fixed by key connection. A scraper blade notch is axially opened inside the long axis of the through hole. An upper back plate and a lower back plate are stacked up and down in the scraper blade notch. The upper back plate and the lower back plate clamp the scraper blade.

[0010] A rotating handle 24 is fixedly attached to the outer wall of the shaft 28. A coarse adjustment gear 29 and a fine adjustment gear 30 are coaxially mounted on the outer side of the shaft 28. The coarse adjustment gear 29 and the fine adjustment gear 30 selectively engage with the shaft 28 via a clutch. A Y-axis screw is disposed at the bottom of the Y-axis movable slide. The ends of the Y-axis screw are mounted between the supports M and G via bearing blocks. One end of the Y-axis screw is coaxially connected to the Y-axis handwheel. An X-axis screw is disposed at the bottom of the X-axis movable slide. The ends of the X-axis screw are mounted to the upper surface of the Y-axis movable slide via bearing blocks. One end of the X-axis screw is coaxially connected to the X-axis handwheel. The X-axis movable slide and the Y-axis movable slide are connected to the screw drive via a screw nut.

[0011] A locking buckle is provided on the outer side wall of the X-axis movable slide corresponding to the end of the long axis of the through hole, which is used to limit the rotation of the long axis of the through hole.

[0012] The through hole long axis is symmetrically provided with a rubber baffle mounting opening on both sides of the scraper blade. The rubber baffle mounting opening is a rectangular groove passing through the side wall of the through hole long axis. The rubber baffle is fixed in the rubber baffle mounting opening by bolts, and the inner edge of the rubber baffle is flush with the side of the scraper blade.

[0013] The second technical solution adopted by the present invention is: The second technical solution of the present invention is also characterized in that the micro-concave coating scraping method adopts the above-mentioned micro-concave coating scraping device and is specifically implemented according to the following steps: The scraper blade is clamped to the long axis of the through-hole through the upper and lower back plates and mounted on the X-axis slide. The contact between the scraper blade and the coating roller is adjusted by the Y-axis movable slide and the X-axis movable slide. The digital displacement sensor and stress sensor collect displacement and stress data and transmit them to the computer. The parameters are recorded according to the rotation period of the coating roller. The average value is calculated by taking 1%-1‰ data points and setting a 70%-80% threshold. When the parameter exceeds the threshold, the slide is driven by the screw rod to translate until the data stabilizes.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention realizes micron-level precise control of the scraper blade position through an X-axis movable slide, a Y-axis movable slide and a screw segmented adjustment mechanism, which is more stable than the rough adjustment of the pneumatic drive in the prior art; the digital displacement sensor and the stress sensor collect data in real time and transmit it to the computer to form a closed-loop control, which solves the problem that the traditional process relies on manual experience for debugging; the locking buckle and the guide roller support constitute a rigid constraint to prevent position deviation caused by vibration during scraping, and cooperate with the glue baffle to avoid splashing of glue, so as to reduce the fluctuation of the glue layer thickness, and significantly improve the uniformity and yield of high-precision coating products such as optical films and lithium battery electrodes. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the structure of the micro-concave coating device of the present invention; Figure 2 Schematic diagram of the structure of the long axis of the through hole in the micro-concave coating device of the present invention; Figure 3 Schematic diagram of the installation position of the coating roller and the pressure roller in the micro-concave coating device of the present invention; Figure 4 Schematic diagram of the moving direction of the material film and the rotating direction of the coating roller in the micro-concave coating device of the present invention; Figure 5 Schematic diagram of the angle adjustment structure of the scraper blade in the micro-dimpled coating device of the present invention; Figure 6 Schematic diagram of the coarse adjustment and fine adjustment structure of the doctor blade angle in the micro-concave coating device of the present invention; In the figure, 1. Support M, 2. Support G, 3. Y-axis movable slide, 4. X-axis movable slide, 5. Digital displacement sensor, 6. Locking buckle, 7. Through-hole long shaft, 8. Upper back plate, 9. Lower back plate, 10. Scraper blade, 11. Stress sensor, 12. Data cable, 13. Computer, 14. Glue baffle, 15. Coating roller, 16. Pressure roller, 17. Guide roller support M, 18. Guide roller support G, 19. Glue groove, 20. Glue, 21. Material film, 22. Screw, 23. Handwheel, 24. Rotating handle, 25. Scraper blade notch, 26. Pre-tightening adjustment bolt, 27. Glue baffle mounting port, 28. Shaft, 29. Coarse adjustment gear, 30. Fine adjustment gear, 31. Coating roller transmission mechanism, 32. Slide rail. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0017] Example 1 like Figure 1-6 As shown, the micro-concave coating and scraping device disclosed in this embodiment includes a support M1 and a support G2, and the support M1 and the support G2 are both provided with a Y-direction movable slide 3, and the top surface of the Y-direction movable slide 3 is provided with an X-direction movable slide 4, and a through-hole long axis 7 is provided between the two X-direction movable slides 4, and a scraper blade 10 is provided in the through-hole long axis 7; it also includes a coating roller 15 and two pressing rollers 16 arranged parallel to the through-hole long axis 7; the coating roller 15 is located at the bottom between the two pressing rollers 16, and the through-hole long axis 7 is flush with the height of the coating roller 15, and a glue groove 19 is provided at the bottom of the coating roller 15, and a glue liquid 20 is provided in the glue groove 19, and the coating roller 15 is partially immersed in the glue liquid 20.

[0018] In this embodiment, the support M1 and the support G2 serve as the basic support of the device and are fixed to the equipment frame by bolts, providing an installation reference for the Y-direction movable slide 3, and relying on its own rigidity to withstand the mechanical load during the scraping process. The Y-direction movable slide 3 is installed on the top of the support, and has a built-in linear guide rail and slider mechanism. It slides along the Y direction (horizontally) by manual or electric drive to adjust the lateral position of the X-direction movable slide 4. The X-direction movable slide 4 is stacked on top of the Y-direction movable slide 3. Its structure is similar to that of the Y-direction slide. It slides along the X direction (longitudinal) and together with the Y-direction movable slide 3 constitutes a dual-axis adjustment platform to achieve two-dimensional position adjustment of the through-hole long axis 7. The through-hole long axis 7 is horizontally mounted between the two X-direction movable slides 4, and an axial slot is provided inside to install the scraper blade 10, which serves as a rigid carrier of the scraper blade 10, transmitting the scraping pressure and ensuring the straightness of the cutting edge. The scraper blade 10 is embedded in the notch of the through-hole axis 7, with its cutting edge facing the coating roller 15. It scrapes away excess glue 20 by contacting the surface of the coating roller 15, thereby controlling the thickness of the adhesive layer. The coating roller 15 is arranged parallel to the through-hole axis 7 and partially immersed in the glue 20 in the glue tank 19. Its rotation transfers the glue 20 to the surface, providing a source of glue for the material film 21. In actual operation, the rotation direction of the coating roller 15 is opposite to the movement direction of the material film 21, which facilitates better scraping. Two pressure rollers 16 are symmetrically mounted above the coating roller 15. By squeezing the material film 21 with the coating roller 15, the coating angle is adjusted to ensure uniform contact between the glue 20 and the material film 21. The glue tank 19 is fixed below the coating roller 15 and contains the glue 20, which is replenished by the glue supply system. As the coating roller 15 rotates, the glue is displaced due to surface adhesion. The Y-axis slide 3 and the X-axis slide 4 coordinate to adjust the position of the through-hole's long axis 7, maintaining a set gap between the blade edge of the scraper blade 10 and the surface of the coating roller 15. The coating roller 15 rotates, driving the adhesive 20 upward. The pressure roller 16 squeezes the material film 21 to form a stable wrap angle, and the scraper blade 10 simultaneously scrapes away excess adhesive, achieving quantitative coating. This solves the problem of uneven adhesive layer thickness caused by insufficient slide adjustment precision and unstable adhesive transfer from the coating roller in traditional pneumatic scraping devices. The dual-axis slide precisely controls the scraping position, and the pressure roller and coating roller work together to ensure uniform adhesive transfer.

[0019] Example 2 On the basis of Example 1, the end of the coating roller 15 is connected to a coating roller transmission mechanism 31 , the support M1 and the support G2 are both mounted with slide rails 32 , and the two pressure rollers 16 are both mounted between the two slide rails 32 .

[0020] In this embodiment, the coating roller drive mechanism 31 is mounted at the end of the coating roller 15 and includes a servo motor and a reduction gearbox. Frequency conversion control is used to achieve stepless adjustment of the coating roller 15's speed from 0 to 1000 rpm. A slide rail 32 is fixed to the top of supports M1 and G2, and cooperates with the slider at the bottom of the pressure roller 16, allowing the pressure roller 16 to move vertically within an adjustment range of 0 to 50 mm. The drive mechanism 31 drives the coating roller 15 to rotate at a set speed, while the slide rail 32 adjusts the downward pressure of the pressure roller 16, changing the wrap angle (30° to 120°) between the film 21 and the coating roller 15, thereby controlling the amount of glue applied. Manual rotation drives the through-hole long axis 7 around its own axis, thereby adjusting the scraping angle of the scraper blade 10 to accommodate the cutting edge angle requirements of different coating processes. Specifically, the rotating handle 24 serves as the point of force application, and the angle adjustment is made more convenient by increasing the operating torque. Especially when it is necessary to fine-tune the contact angle between the scraper blade and the coating roller 15, manual fine-tuning within the range of ±15° can be achieved. After the angle is fixed with the locking buckle 6, the angle can be ensured to be stable during the scraping process, avoiding uneven thickness of the glue layer or edge defects due to angle deviation.

[0021] Example 3 On the basis of Example 1, digital displacement sensors 5 are respectively installed next to the sliding guide rails of the Y-axis movable slide 3 and the X-axis movable slide 4, and stress sensors 11 are symmetrically embedded on the contact surfaces of the upper back plate 8, the lower back plate 9 and the long axis of the through hole 7. The digital displacement sensor 5 and the stress sensor 11 are connected to the computer 13 via a data cable 12.

[0022] In this embodiment, the digital displacement sensor 5 is installed next to the guide rails of the Y-axis movable slide 3 and the X-axis movable slide 4. It uses grating ruler technology to collect slide displacement data in real time with a resolution of 1μm. The stress sensor 11 is embedded in the contact surface between the upper back plate 8 and the lower back plate 9 and the long axis 7 of the through hole. It converts the scraping pressure into an electrical signal based on the piezoresistive effect, with a range of 0-50N. The data line 12 transmits the sensor signal, and the computer 13 has a built-in algorithm to display the displacement-stress curve in real time and supports threshold setting. The digital displacement sensor 5 and the stress sensor 11 transmit data to the computer 13. When the pressure fluctuation exceeds the threshold, the computer 13 issues an early warning and moves the slide to form a closed-loop control.

[0023] Furthermore, the stress sensor 11 is a sheet-like structure, which is nested between the top of the upper back plate 8 and the top surface of the inner wall of the through-hole long axis 7, and between the bottom of the lower back plate 9 and the bottom surface of the inner wall of the through-hole long axis 7, and the sensing surface of the stress sensor 11 is completely in contact with the contact surfaces of the upper back plate 8 and the lower back plate 9.

[0024] In this embodiment, the stress sensor 11 adopts a 0.1mm ultra-thin sheet structure, which is nested between the top of the upper back plate 8 and the top surface of the inner wall of the through-hole long axis 7, and between the bottom of the lower back plate 9 and the bottom surface of the inner wall of the through-hole long axis 7. The sensing surface is completely fitted with the back plate to ensure that the stress signal is transmitted without attenuation.

[0025] Example 4 On the basis of Example 3, the middle parts of the two X-axis movable slides 4 are connected to the through-hole long axis 7 through the guide roller support M17 and the guide roller support G18. The two ends of the through-hole long axis 7 are rotatably connected to the guide roller support M17 and the guide roller support G18 through the shaft 28. The two ends of the through-hole long axis 7 are sleeved in the middle part of the shaft 28 and fixed by a key connection. A scraper blade notch 25 is axially opened inside the through-hole long axis 7 , and an upper back plate 8 and a lower back plate 9 are stacked up and down in the scraper blade notch 25 . The upper back plate 8 and the lower back plate 9 clamp the scraper blade 10 .

[0026] In this embodiment, the guide roller support M17 and the guide roller support G18 are fixed to the middle of the X-axis slide 4, with bearings installed inside to support the shaft 28 and allow the through-hole long axis 7 to rotate about the shaft 28. The ends of the shaft 28 are interference fit with the bearings of the guide roller support M17 and the guide roller support G18, and the middle is fixed to the through-hole long axis 7 by a flat key. The scraper blade notch 25 is opened at the axial center of the through-hole long axis 7 and has a rectangular cross-section. The upper back plate 8 and the lower back plate 9 are stacked on top of each other in the scraper blade notch 25 to clamp the scraper blade 10. The guide roller support M17 and the guide roller support G18 form a rotating pair with the shaft 28, allowing the through-hole long axis 7 to adjust the scraping angle. The upper back plate 8 and the lower back plate 9 evenly transmit pressure to the scraper blade 10. In actual assembly, a preload adjustment bolt 26 is provided, acting on the upper back plate 8 or the lower back plate 9, to adjust the clamping force of the scraper blade 10. Specifically, the preload adjustment bolt 26 is provided on the side wall of the scraper blade notch 25 of the through-hole major axis 7, with the end of the preload adjustment bolt 26 resting against the upper back plate 8 or the lower back plate 9. By rotating the preload adjustment bolt 26, the back plate is pushed to apply pressure to the scraper blade 10, achieving fine-tuning of the clamping force. The preload adjustment bolt 26 can be equipped with a lock nut to prevent loosening after adjustment.

[0027] Furthermore, a rotating handle 24 is fixedly connected to the outer wall of the shaft 28 , and a coarse adjustment gear 29 and a fine adjustment gear 30 are coaxially mounted on the outer side of the shaft 28 . The coarse adjustment gear 29 and the fine adjustment gear 30 are selectively engaged with the shaft 28 through a clutch.

[0028] In this embodiment, the rotating handle 24 is bolted or welded to the outer wall of the shaft 28, forming a rigid connection that ensures synchronous rotation of the shaft 28 when manual force is applied. A coarse-adjustment gear 29 and a fine-adjustment gear 30 are coaxially mounted on the outside of the shaft 28, allowing both to rotate freely about the shaft 28. The inner sides of the gears selectively engage with the shaft 28 via a tooth clutch, with only one clutch engaged at a time to prevent transmission interference. The shaft 28 serves as the rotation center of the through-hole long axis 7, supporting the through-hole long axis 7 and transmitting rotational torque, enabling the through-hole long axis 7 to adjust the scraping angle of the scraper blade 10 around the shaft 28 (with an adjustment range of ±15°). The coarse-adjustment gear 29 drives the large gear to engage with the small gear on the shaft 28. One rotation results in a larger rotation angle of the shaft 28, suitable for rapid positioning. The fine-adjustment gear 30 drives the small gear to engage with the large gear on the shaft 28. One rotation results in a smaller rotation angle of the shaft 28, suitable for fine adjustment. In this embodiment, there are three ways to adjust the scraping angle of the scraper blade 10: 1. Manually rotate the rotating handle 24 → directly rotate the shaft 28 → the long axis 7 of the through hole rotates around the shaft 28 → the angle of the scraper blade 10 changes; rotate the coarse adjustment gear 29 → engage the first clutch → the large transmission ratio gear group drives the shaft 28 to rotate quickly → the angle of the scraper blade 10 is coarsely adjusted; rotate the fine adjustment gear 30 → engage the second clutch → finely rotate the small transmission ratio gear group drive shaft 28 → finely adjust the angle of the scraper blade 10.

[0029] Example 5 On the basis of Example 4, a Y-direction screw rod 22 is provided at the bottom of the Y-direction movable slide 3, and both ends of the Y-direction screw rod 22 are installed between the support M1 and the support G2 through bearing seats, and one end of the Y-direction screw rod 22 is coaxially connected to the Y-direction handwheel 23; an X-direction screw rod 22 is provided at the bottom of the X-direction movable slide 4, and both ends of the X-direction screw rod 22 are installed on the upper surface of the Y-direction movable slide 3 through bearing seats, and one end of the X-direction screw rod 22 is coaxially connected to the X-direction handwheel 23, and the X-direction movable slide 4 and the Y-direction movable slide 3 are connected to the screw rod 22 through a screw nut; wherein, the handwheel 23 is connected to a rotating handle 24.

[0030] In this embodiment, the screw 22 utilizes a trapezoidal thread with a pitch divided into coarse and fine adjustment sections. A screw-nut pair converts rotary motion into linear motion for the Y-axis slide 3 and the X-axis slide 4. The handwheel 23 features a knurled edge for anti-slip operation, and a rotating handle 24 increases the operating lever arm and reduces adjustment torque. A bearing block, secured to the support or slide surface, houses built-in deep-groove ball bearings that support both ends of the screw 22. Rotating the handwheel 23 drives the slide via the screw 22. The coarse adjustment section allows for rapid positioning, while the fine adjustment section allows for precise calibration. The rotating handle 24 provides a lever that reduces effort.

[0031] Example 6 On the basis of Examples 1-5, a locking buckle 6 is provided on the outer side wall of the X-axis movable slide 4 corresponding to the end of the through hole long axis 7 to limit the rotation of the through hole long axis 7.

[0032] In this embodiment, the locking buckle 6 adopts a U-shaped stainless steel claw, one end of which is hinged to the side wall of the X-axis movable slide 4 and the other end is locked by a bolt. A rubber pad is attached to the inside to clamp the end of the through-hole long axis 7 to limit rotation.

[0033] Example 7 On the basis of Examples 1-6, the rubber baffle plate mounting openings 27 are symmetrically opened along both sides of the scraper blade 10 along the long axis 7 of the through hole. The rubber baffle plate mounting openings 27 are rectangular grooves that pass through the side walls of the long axis 7 of the through hole. The rubber baffle plate 14 is fixed in the rubber baffle plate mounting openings 27 by bolts, and the inner edge of the rubber baffle plate 14 is flush with the side of the scraper blade 10.

[0034] In this embodiment, the rubber baffle mounting openings 27 are symmetrically opened on both sides of the long axis 7 of the through hole, and threaded holes are provided on the rectangular groove wall for fixing the rubber baffle 14 .

[0035] The glue blocking plate 14 is made of a polytetrafluoroethylene plate, and its inner edge is flush with the side surface of the scraper blade 10 to block the glue liquid 20 from flowing to both sides.

[0036] The present invention also discloses a micro-concave coating method, which is implemented by using the micro-concave coating device of Example 5 and specifically following the steps below: The scraper blade 10 is clamped to the long axis of the through hole 7 through the upper back plate 8 and the lower back plate 9 and mounted on the X-axis slide 4; the contact between the scraper blade 10 and the coating roller 15 is adjusted by the Y-axis movable slide 3 and the X-axis movable slide 4; the digital displacement sensor 5 and the stress sensor 11 collect displacement and stress data and transmit them to the computer 13, and the parameters are recorded according to the rotation period of the coating roller. The average value is calculated by taking 1%-1‰ data points and setting a 70%-80% threshold; when the parameter exceeds the threshold, the slide is driven to translate by the screw rod 22 until the data is stable.

[0037] The scraper blade 10 is clamped to the through-hole long axis 7 via the upper and lower backing plates 8 and 9. The angle is adjusted using the guide roller supports M17 and G18 and the shaft 28, and the locking buckle 6 secures the position. The digital displacement sensor 5 and the stress sensor 11 collect data, which is transmitted to the computer 13 via the data line 12. The parameters are recorded over the rotation period of the coating roller 15. When the parameters exceed the threshold, the fine adjustment gear 30 switches to the fine pitch section of the screw rod 22, adjusting the slide position until the data stabilizes.

[0038] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0039] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0040] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Micro-concave coating device, characterized in that: The invention comprises a support M (1) and a support G (2), wherein the support M (1) and the support G (2) are both provided with a Y-direction movable slide (3), and the top surface of the Y-direction movable slide (3) is provided with an X-direction movable slide (4), a through-hole long axis (7) is provided between the two X-direction movable slides (4), and a scraper blade (10) is provided in the through-hole long axis (7); and further comprises a coating roller (15) and two pressing rollers (16) arranged parallel to the through-hole long axis (7); the coating roller (15) is located at the bottom between the two pressing rollers (16), the through-hole long axis (7) is flush with the coating roller (15), a glue groove (19) is provided at the bottom of the coating roller (15), a glue liquid (20) is provided in the glue groove (19), and the coating roller (15) is partially immersed in the glue liquid (20).

2. The micro-concave coating device according to claim 1, characterized in that: The end of the coating roller (15) is connected to a coating roller transmission mechanism (31), and the support M (1) and the support G (2) are both installed with slide rails (32), and the two pressure rollers (16) are both installed between the two slide rails (32).

3. The micro-concave coating device according to claim 1, characterized in that: Digital displacement sensors (5) are installed beside the sliding guide rails of the Y-axis movable slide (3) and the X-axis movable slide (4), respectively. Stress sensors (11) are symmetrically embedded on the contact surfaces of the upper back plate (8), the lower back plate (9) and the long axis of the through hole (7). The digital displacement sensor (5) and the stress sensor (11) are connected to the computer (13) via a data line (12).

4. The micro-concave coating device according to claim 3, characterized in that: The stress sensor (11) is a sheet-like structure, and is respectively nested between the top of the upper back plate (8) and the top surface of the inner wall of the long axis of the through hole (7), and between the bottom of the lower back plate (9) and the bottom surface of the inner wall of the long axis of the through hole (7), and the sensing surface of the stress sensor (11) is completely in contact with the contact surfaces of the upper back plate (8) and the lower back plate (9).

5. The micro-concave coating device according to claim 3, characterized in that: The middle parts of the two X-direction movable slides (4) are connected to the through-hole long axis (7) through the guide roller support M (17) and the guide roller support G (18), and the two ends of the through-hole long axis (7) are rotatably connected to the guide roller support M (17) and the guide roller support G (18) through the shaft (28), and the two ends of the through-hole long axis (7) are sleeved in the middle part of the shaft (28) and fixed by a key connection; a scraper blade notch (25) is opened in the axial direction inside the through-hole long axis (7), and an upper back plate (8) and a lower back plate (9) are stacked up and down in the scraper blade notch (25), and the upper back plate (8) and the lower back plate (9) clamp the scraper blade (10).

6. The micro-concave coating device according to claim 5, characterized in that: A rotating handle (24) is fixedly connected to the outer wall of the shaft (28), and a coarse adjustment gear (29) and a fine adjustment gear (30) are coaxially mounted on the outer side of the shaft (28). The coarse adjustment gear (29) and the fine adjustment gear (30) are selectively engaged with the shaft (28) through a clutch.

7. The micro-concave coating device according to claim 5, characterized in that: A Y-direction screw rod (22) is provided at the bottom of the Y-direction movable slide (3), and both ends of the Y-direction screw rod (22) are installed between the support M (1) and the support G (2) through bearing seats, and one end of the Y-direction screw rod (22) is coaxially connected to the Y-direction hand wheel (23); an X-direction screw rod (22) is provided at the bottom of the X-direction movable slide (4), and both ends of the X-direction screw rod (22) are installed on the upper surface of the Y-direction movable slide (3) through bearing seats, and one end of the X-direction screw rod (22) is coaxially connected to the X-direction hand wheel (23), and the X-direction movable slide (4) and the Y-direction movable slide (3) are connected to the screw rod (22) through a screw nut.

8. The micro-dimpled coating device according to any one of claims 1 to 7, characterized in that: A locking buckle (6) is provided on the outer side wall of the X-direction movable slide (4) corresponding to the end of the through hole long axis (7) for limiting the rotation of the through hole long axis (7).

9. The micro-dimpled coating device according to any one of claims 1 to 6, characterized in that: The through hole long axis (7) is symmetrically provided with a rubber baffle mounting opening (27) along both sides of the scraper blade (10). The rubber baffle mounting opening (27) is a rectangular groove penetrating the side wall of the through hole long axis (7). The rubber baffle (14) is fixed in the rubber baffle mounting opening (27) by bolts, and the inner edge of the rubber baffle (14) is flush with the side surface of the scraper blade (10).

10. A micro-concave coating method using the micro-concave coating device according to claim 7, characterized in that: Please follow the steps below to implement it: The scraper blade (10) is clamped to the long axis of the through hole (7) through the upper back plate (8) and the lower back plate (9) and mounted on the X-axis slide (4); the scraper blade (10) is adjusted to contact with the coating roller (15) through the Y-axis movable slide (3) and the X-axis movable slide (4); the digital displacement sensor (5) and the stress sensor (11) collect displacement and stress data and transmit them to the computer (13), and the parameters are recorded with the rotation period of the coating roller, and the average value is calculated by taking 1%-1‰ data points and setting a 70%-80% threshold; when the parameter exceeds the threshold, the slide is driven to translate through the screw rod (22) until the data is stable.

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