Micro-pit coating device

Abstract

The application provides a micro-concave coating device, which comprises a rack, a scraper assembly and an actuating assembly; the scraper assembly is rotationally connected with the rack through a rotating mechanism; the scraper assembly comprises a scraper holder and a scraper arranged on the scraper holder; the rotating mechanism comprises rotating parts arranged at opposite ends of the scraper holder and rotating matching parts arranged on the rack correspondingly, and the rotating parts are rotationally connected with the rotating matching parts; the actuating assembly is connected with the rack and the scraper holder; the two ends of the scraper holder can synchronously rotate relative to the rack, and then the scraper holder can be regarded as a rigid whole, which maintains good rotational consistency; and then during the operation of the scraper, the deformation of the scraper holder in the width direction is very small, the whole maintains high horizontal precision, the structure stability is good, and the coating quality of the product is effectively improved.

Description

Technical Field

[0001] This application relates to the field of coating technology, and in particular to a microgravure coating apparatus. Background Technology

[0002] Microgravure coating is a precise and efficient thin-layer coating technology, particularly suitable for applying very thin and uniform coatings to flexible substrates (such as electrochromic films, brightness enhancement films, diffusion films, ITO conductive films, AR / AG films, protective films, etc.). Its core working principle lies in using a very small diameter roller (coating roller) with precisely engraved micro-cells on its surface to accurately measure and transfer the coating material. A doctor blade on a blade holder serves as the quantitative tool for coating material application. Adjusting the gap between the doctor blade and the coating roller determines the final coating thickness on the substrate surface, which is crucial for microgravure coating. Consequently, the stability of the doctor blade has a significant impact on the quality of the coated product.

[0003] In some existing microgravure coating devices, multiple drive cylinders are arranged sequentially along the length of the tool holder, and the tool holder is driven and supported and adjusted by the coordinated action of each drive cylinder. However, due to the influence of factors such as the air pressure of each cylinder, the synchronization of the cylinder stroke, and the levelness of the connection position between each cylinder and the tool holder, the consistency at both ends of the tool holder cannot be guaranteed, resulting in deviations in the overall levelness of the tool holder. This can easily lead to uneven coating thickness, causing significant quality problems for the product. Utility Model Content

[0004] The purpose of this application is to provide a microgravure coating device, which aims to solve the problems of poor consistency at both ends of the tool holder structure and deviation in overall levelness of existing microgravure coating devices.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: This application provides a microgravure coating apparatus, including a frame, a doctor blade assembly, and an actuation assembly. The doctor blade assembly is rotatably coupled to the frame via a rotating mechanism. The doctor blade assembly includes a blade holder body and a doctor blade disposed on the blade holder body. The rotating mechanism includes rotating portions disposed at opposite ends of the blade holder body and corresponding rotating mating portions disposed on the frame. The rotating portions are rotatably connected to the rotating mating portions. The actuation assembly is connected to the frame and the blade holder body.

[0006] The beneficial effects of the microgravure coating apparatus of this application are as follows: the two ends of the blade holder body are respectively rotatably engaged with the frame, that is, the two ends of the blade holder body can rotate synchronously relative to the frame, so that the two ends of the blade holder body can maintain good rotational consistency; furthermore, the blade holder body can be regarded as a rigid whole, and the blade holder body as a whole can rotate around a unified rotation axis, possessing high torsional and bending strength. As a result, during the operation of the blade, the deformation of the blade holder body in the width direction is very small, the whole body maintains high horizontal accuracy, has good structural stability, and effectively improves the coating quality of the product.

[0007] In some embodiments, the rotating part includes rotating shafts respectively disposed at opposite ends of the tool holder body, and the rotating mating part includes a bearing seat disposed on the frame, the rotating shaft being rotatably connected to the bearing seat.

[0008] In some embodiments, the tool holder body is a column structure, the tool holder body has mounting base surfaces located at opposite ends, and the rotating shaft is disposed on the mounting base surface and protrudes outward.

[0009] In some embodiments, the blade holder body has a first side and a second side connected between two mounting bases, the scraper is disposed on the first side, and one end of the actuation assembly is connected to the second side.

[0010] In some embodiments, the actuation assembly includes an actuator with its two ends hinged to the scraper assembly and the frame, respectively, and the actuator is used for telescopic movement to cause the scraper assembly to rotate relative to the frame.

[0011] In one embodiment, there are multiple actuators, which are spaced apart along the width of the scraper assembly.

[0012] In some embodiments, the micro-grooving coating apparatus further includes a limiting structure, the limiting structure including a limiting link disposed on the rotating shaft and rotating synchronously with the rotating shaft, and a first limiting member and a second limiting member disposed on the shaft seat; the limiting link has a first position abutting against the first limiting member, corresponding to the highest raised position of the scraper; the limiting link has a second position abutting against the second limiting member, corresponding to the lowest lowered position of the scraper.

[0013] In some embodiments, one end of the rotating shaft away from the tool holder body protrudes outward from the shaft seat, and the portion of the rotating shaft protruding beyond the shaft seat is provided with the limiting link; the shaft seat is provided with a limiting mating seat, the first limiting member passes through the limiting mating seat and is used to limit the portion of the limiting link located on one side of the rotating shaft; the second limiting member passes through the limiting mating seat and is used to limit the portion of the limiting link located on the other side of the rotating shaft.

[0014] In some embodiments, the micro-grooving coating apparatus further includes a speed reduction assembly having an input end and an output end. The output end of the speed reduction assembly is connected to the rotating shaft, and the input end of the speed reduction assembly is provided with an adjustment handle. The adjustment handle is rotated n times to drive the rotating shaft to rotate 1 revolution through the speed reduction assembly, where n > 1.

[0015] In some embodiments, the microgravure coating apparatus further includes a coating roller, wherein the width direction of the blade holder body is arranged parallel to the axial direction of the coating roller. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a side view of the doctor blade assembly in contact with the coating roller according to an embodiment of this application; Figure 2 This is a side view of the doctor blade assembly detached from the coating roller according to an embodiment of this application. Figure 3 A three-dimensional structural schematic diagram of a micro-recessed coating apparatus provided in an embodiment of this application; Figure 4 A three-dimensional structural schematic diagram of the micro-concave coating apparatus provided in an embodiment of this application from another angle; Figure 5 This is a side view of the structure of the doctor blade assembly, coating roller and actuation assembly provided in an embodiment of this application; Figure 6 This is a three-dimensional structural diagram of the scraper assembly, actuation assembly, and frame assembly provided in an embodiment of this application; Figure 7 This is a three-dimensional structural diagram of a limiting structure provided in an embodiment of this application; Figure 8 This is a three-dimensional structural diagram of a deceleration component provided in an embodiment of this application.

[0018] The labels for the attached figures are as follows: 1000, Microgravure coating device; 1. Rack; 2. Scraper assembly; 210. Tool holder body; 211. First side; 212. Second side; 201. Mounting base; 220. Scraper; 3. Actuation assembly; 310. Actuator; 4. Rotating mechanism; 410. Rotating part; 411. Rotating shaft; 420. Rotating mating part; 421. Shaft seat; 5. Coating roller; 6. Limiting linkage; 7. Limiting mating seat; 8. First limiting component; 9. Second limiting component; 10. Reduction gear assembly; 11. Adjustment handle; 12. Feed roller; 13. Discharge roller. Detailed Implementation

[0019] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0020] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0021] Furthermore, in the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0022] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0024] In current microgravure coating devices, multiple drive cylinders are sequentially arranged along the length of the tool holder, and the tool holder is driven and supported by the coordinated action of each drive cylinder. However, due to the influence of factors such as the air pressure of each cylinder, the synchronization of the cylinder stroke, and the levelness of the connection position between each cylinder and the tool holder, the consistency at both ends of the tool holder cannot be guaranteed, resulting in deviations in the levelness of the tool holder. This can easily lead to uneven coating thickness, causing significant quality problems for the product.

[0025] Based on this, in order to solve the above problems, this application designs a micro-groove coating device. The two ends of the blade holder body are respectively rotatably engaged with the frame, that is, the two ends of the blade holder body can rotate synchronously relative to the frame, so that the two ends of the blade holder body can maintain good rotational consistency. Furthermore, the blade holder body can be regarded as a rigid whole, and the blade holder body as a whole can rotate around a unified rotation axis, possessing high torsional and bending strength. As a result, during the flipping and coating process, the deformation of the blade holder body in the width direction is very small, maintaining high horizontal accuracy and good structural stability, effectively improving the coating quality of the product.

[0026] refer to Figures 1 to 4 One embodiment of this application provides a microgravure coating apparatus 1000, including a frame 1, a scraper assembly 2, and an actuation assembly 3; the scraper assembly 2 is rotatably engaged with the frame 1 via a rotating mechanism 4, and the scraper assembly 2 includes a blade holder body 210 and a scraper 220 disposed on the blade holder body 210; the rotating mechanism 4 includes rotating portions 410 disposed at opposite ends of the blade holder body 210, and rotating engagement portions 420 correspondingly disposed on the frame, the rotating portions 410 being rotatably connected to the rotating engagement portions 420; the actuation assembly 3 is connected to the frame 1 and the scraper assembly 2.

[0027] Specifically, the frame 1 is provided with rotating mating parts 420 at the corresponding positions at both ends of the blade holder body 210. The two ends of the blade holder body 210 are rotatably connected to the rotating mating parts 420 through the rotating parts 410, that is, the two ends of the blade holder body 210 can rotate synchronously relative to the frame 1, so that the two ends of the blade holder body 210 can maintain good rotational consistency. Furthermore, the blade holder body 210 can be regarded as a rigid whole. The blade holder body 210 as a whole can rotate around a unified rotation axis, and has high torsional and bending strength. As a result, during the flipping and coating process of the doctor blade 220, the deformation of the blade holder body 210 and the doctor blade 220 in the width direction w is very small, and the whole maintains high horizontal accuracy, good structural stability, and effectively improves the coating quality of the product.

[0028] refer to Figure 3 and Figure 4 The width direction of the scraper assembly 2 is the w direction shown in the figure.

[0029] For example, the rotational fit structure between the rotating part 410 and the rotational fit part 420 may specifically adopt, but is not limited to, rotational fit methods such as rotating shaft and bearing seat, rotating shaft and bushing, pin and shaft hole, bolt and nut, so as to ensure that the two ends of the scraper assembly 2 can rotate stably relative to the frame 1.

[0030] It should be noted that the reference Figures 1 to 4 The microgravure coating apparatus 1000 of this application also includes a coating roller 5. The coating roller 5 and the doctor blade assembly 2 work together to precisely measure and transfer the coating material onto the substrate to be coated. The coating roller 5 is a gravure roller with precision cells, and its surface carries excess coating material. The coating roller 5 rotates around its axis. The doctor blade assembly 2 contacts the surface of the coating roller 5 at a certain angle and pressure. The doctor blade assembly 2 is used to thoroughly scrape away excess coating material from the non-cell areas of the coating roller 5 surface. While scraping away excess coating material, the movement of the doctor blade assembly 2 forces the coating material to fully fill the precision cells on the surface of the coating roller 5. The coating roller 5 rotates to transport a measured amount of coating material within the cells to the transfer area in contact with the substrate to be coated, thereby forming a uniform coating on the substrate. Specifically, the use of the coating roller 5 and the doctor blade assembly 2 for coating is well-known in the field of existing microgravure coating technology, and will not be described in detail in this embodiment.

[0031] Understandably, the actuation component 3 is used to drive the doctor blade assembly 2 to rotate relative to the frame 1 and provides controllable and stable pressure for the contact between the doctor blade assembly 2 and the coating roller 5. After the doctor blade assembly 2 contacts the coating roller 5, the driving force of the actuation component 3 is adjusted to precisely control the pressure of the doctor blade assembly 2 on the surface of the coating roller 5, so as to ensure that the doctor blade assembly 2 cleanly scrapes off the excess coating material on the roller surface of the coating roller 5, while ensuring that the coating material in the cells of the coating roller 5 is fully and stably filled, thus ensuring an accurate coating amount.

[0032] Specifically, the actuation component 3 may be, but is not limited to, a cylinder, a servo motor, an electric push rod, a hydraulic cylinder, etc., to provide a stable force to the scraper assembly 2.

[0033] refer to Figure 4 , Figure 5 and Figure 6 In some embodiments, the rotating part 410 includes rotating shafts 411 respectively disposed at opposite ends of the tool holder body 210, and the rotating mating part 420 includes a bearing seat 421 disposed on the frame 1, with the rotating shaft 411 rotatably connected to the bearing seat 421.

[0034] Specifically, the width direction w of the blade holder body 210 is parallel to the axial direction of the coating roller 5. The blade holder body 210 is a support beam structure with high torsional and bending strength. Its two ends are rotatably connected to the frame 1. During rotation and coating, the blade holder body 210 has small deformation in the width direction w and small overall horizontal deviation. The doctor blade 220 is set on the blade holder body 210 along the width direction w. When the blade holder body 210 rotates as a whole, the contact line between the doctor blade 220 and the coating roller 5 always maintains a high parallel fit accuracy with the axis of the coating roller 5, so that the doctor blade 220 can make uniform contact with the coating roller 5 in the width direction w to achieve better coating uniformity.

[0035] Understandably, the length of the blade holder body 210 in the width direction w is close to the length of the coating roller 5, which helps to maintain a high degree of parallelism between the two; the doctor blade 220 is long and narrow, with the end of the doctor blade 220 closest to the coating roller 5 being the cutting edge, and the length of the doctor blade 220 in the width direction w being close to the length of the coating roller 5, which allows for a larger scraping coverage area and helps to maintain a high degree of parallelism between the contact line between the doctor blade 220 and the coating roller 5 and the axis of the coating roller 5.

[0036] refer to Figure 5 and Figure 6 In some embodiments, the tool holder body 210 is a cylindrical structure, and the tool holder body 210 has mounting base surfaces 201 located at opposite ends, and the rotating shaft 411 is provided on the mounting base surface 201 and protrudes outward.

[0037] Understandably, the tool holder structure in the prior art is usually a plate-shaped tool holder or an L-shaped tool holder. To obtain high rigidity, the plate-shaped tool holder must be made very thick, resulting in huge weight, large inertia and slow response. The asymmetry of the L-shaped tool holder results in extremely poor torsional rigidity, and it is very easy to twist and deform under pressure, resulting in uneven coating in the lateral direction during coating.

[0038] In this embodiment, the tool holder body 210 is designed as a column structure, and the mounting base 201 can be or tend to be circular, triangular, trapezoidal, rhomboid, or other shapes. The tool holder body 210 has a better ability to resist torsional deformation and can bear a large axial pressure, thus serving as a stable support reference platform to support the scraper 220.

[0039] In some embodiments, the interior of the tool holder body 210 can be a hollow structure, and stiffeners and reinforcing ribs are provided inside the tool holder body 210 to give the tool holder body 210 sufficient rigidity while achieving structural lightweighting, effectively reducing the inertia of the tool holder body 210 and making its rotation response faster.

[0040] The rotating shaft 411 is vertically mounted on the mounting base 201 of the tool holder body 210, making it easy to process and manufacture the rotating shaft 411.

[0041] refer to Figures 5 to 6 In some embodiments, the blade holder body 210 has a first side 211 and a second side 212 connected between two mounting base surfaces 201, and the scraper 220 is disposed on the first side 211; one end of the actuation component 3 is connected to the second side 212.

[0042] Specifically, the tool holder body 210 has a columnar structure, and the outer periphery of the tool holder body 210 forms a flat first side 211 and a second side 212. The first side 211 is conducive to setting the scraper 220, so that the scraper 220 is parallel to the width direction w of the tool holder body 210, which helps to improve the installation and fitting accuracy.

[0043] The second side 212 facilitates the setting of a connection structure that connects and cooperates with the actuation component 3, which is beneficial for structural assembly.

[0044] For example, the first side 211 and the second side 212 can be two adjacent sides; or, the first side 211 and the second side 212 can be two non-adjacent sides.

[0045] refer to Figure 6 In some embodiments, the actuation assembly 3 includes an actuator 310, the two ends of which are hinged to the tool holder body 210 and the frame 1, respectively. The actuator 310 is used for telescopic movement to cause the tool holder body 210 to rotate relative to the frame 1.

[0046] Specifically, the actuator 310 drives the blade holder body 210 to rotate around the rotation axis through telescopic movement, thereby adjusting the blade 220 to move closer to or further away from the coating roller 5, and adjusting the pressure when the blade 220 contacts or contacts the coating roller 5.

[0047] Understandably, the tool holder body 210 rotates around a fixed axis, while the actuator 310 moves linearly. The actuator 310 is hinged at both ends to the tool holder body 210 and the frame 1, respectively, allowing it to swing freely at a small angle while driving the tool holder body 210 to rotate, thus perfectly matching the arc trajectory of the tool holder body 210. Consequently, the driving force of the actuator 310 is always transmitted along its own linear motion direction and, through the hinge point with the tool holder body 210, is efficiently converted into the rotational torque of the tool holder body 210 along the tangential direction. This makes the force transmission path clear, efficient, and with minimal energy loss.

[0048] Specifically, the actuator 310 can be any one of a cylinder, a servo motor, an electric push rod, or a hydraulic cylinder; preferably, in the embodiments of this application, the actuator 310 is a cylinder.

[0049] In some embodiments, there are multiple actuators 310, which are arranged at intervals along the width direction w of the doctor blade assembly 2. The multiple actuators 310 respectively provide force to the blade holder body 210, so that the contact pressure between the doctor blade assembly 2 and the coating roller 5 is evenly distributed, thereby improving the stability during the coating operation.

[0050] refer to Figure 7 In some embodiments, the micro-grooving coating apparatus 1000 further includes a limiting structure, which includes a limiting link 6 disposed on the rotating shaft 411 and rotating synchronously with the rotating shaft 411, and a first limiting member 8 and a second limiting member 9 disposed on the bearing seat 421 for abutting and limiting the limiting link 6; the limiting link 6 has a first position abutting the first limiting member 8, corresponding to the highest raised position of the scraper 220, and the limiting link 6 has a second position abutting the second limiting member 9, corresponding to the lowest lowered position of the scraper 220.

[0051] Specifically, the rotation of the blade holder body 210 can drive the scraper 220 to rise and fall, thereby adjusting the pressure between the scraper 220 and the coating roller 5. Through the first limiting member 8 and the second limiting member 9, the rotation range of the limiting link 6 can be effectively limited, that is, the rotation angle range of the blade holder body 210 can be limited, so that the scraper 220 can be adjusted within a safe range, avoiding excessive contact between the scraper 220 and the coating roller 5, which would damage the high-precision roller surface.

[0052] Continue to refer to Figure 7One end of the rotating shaft 411 away from the tool holder body 210 protrudes outward from the shaft seat 421. The part of the rotating shaft 411 that protrudes beyond the shaft seat 421 is provided with a limiting link 6. The shaft seat 421 is provided with a limiting mating seat 7. A first limiting member 8 passes through the limiting mating seat 7 and is used to limit the part of the limiting link 6 located on one side of the rotating shaft 411. A second limiting member 9 passes through the limiting mating seat 7 and is used to limit the part of the limiting link 6 located on the other side of the rotating shaft 411.

[0053] Understandably, both the first limiting member 8 and the second limiting member 9 are mounted on the limiting mating seat 7, resulting in a more reasonable structural layout and less space occupation.

[0054] Specifically, by pre-adjusting the depth of the first limiting member 8 and the second limiting member 9 within the limiting mating seat 7, the distance between the first limiting member 8 and the limiting connecting rod 6, as well as the distance between the second limiting member 9 and the limiting connecting rod 6, can be adjusted, thereby achieving precise adjustment of the rotation range of the limiting connecting rod 6. For example, the first limiting member 8 and the second limiting member 9 can be screws, with corresponding threaded holes provided on the limiting mating seat 7. Their positions can be adjusted by screwing on the first limiting member 8 and the second limiting member 9, making adjustment simple and quick.

[0055] refer to Figure 8 In some embodiments, the micro-grooving coating apparatus 1000 further includes a speed reduction assembly 10, which has an input end and an output end. The output end of the speed reduction assembly 10 is connected to the rotating shaft 411. The input end of the speed reduction assembly 10 is provided with an adjustment handle 11. The adjustment handle 11 rotates n times to drive the rotating shaft 411 to rotate 1 time through the speed reduction assembly 10, and n is greater than 1.

[0056] Specifically, the reduction assembly 10 is a precision transmission device used to realize the direct transmission between the adjustment handle 11 and the rotating shaft 411; the rotating shaft 411 is directly mounted on the tool holder body 210, and the adjustment handle 11 drives the rotating shaft 411 to rotate, which in turn directly drives the tool holder body 210 to rotate.

[0057] It should be noted that the speed ratio of the reduction gear 10 is n:1, meaning that for every n rotations of the adjusting handle 11, the rotating shaft rotates 1 revolution. For example, n is an integer, and the speed ratio of the reduction gear 10 can be any value from: 2:1, 3:1, 4:1, 5:1, 10:1, 15:1, 20:1, 25:1, 30:1, 35:1, and 40:1.

[0058] For example, the speed reduction assembly 10 has a rotational speed ratio of 20:1. Therefore, if one rotation of the shaft 411 corresponds to a linear displacement of 1 mm for the scraper 220, then one rotation of the adjusting handle 11 corresponds to a movement of only 0.05 mm (50 μm) for the blade holder. The scale on the handle can even be subdivided to 1° of rotation, corresponding to a displacement change of less than 1 μm. Thus, using the speed reduction assembly 10, the operator can easily make micron-level adjustments to the scraper 220, achieving ultra-fine adjustment.

[0059] Furthermore, the reduction assembly 10 amplifies the output torque while reducing the rotational speed. According to the law of conservation of energy, the reduction ratio is n:1, and theoretically the output torque is n times the input torque. Consequently, the operator only needs to use a small force to turn the adjusting handle 11 to overcome the large static friction and mechanical resistance of the tool holder body 210, achieving smooth and labor-saving adjustment.

[0060] For example, the reduction structure within the reduction assembly 10 may specifically employ, but is not limited to, worm gears, planetary gear reducers, high reduction ratio gear sets, etc.

[0061] In one specific embodiment of this application, a limiting structure is provided at one end of the tool holder body 210, and a deceleration component 10 is provided at the other end of the tool holder body 210 to avoid interference between the two structures; the overall structural layout is more compact and effectively improves space utilization.

[0062] In one embodiment, the adjustment handle 11 is a rotary wheel structure. The rotary wheel supports continuous, stepless rotational motion, which can achieve a smooth adjustment process and make the operation easy and effortless.

[0063] Preferably, the structure inside the reduction assembly 10 of this application is a worm gear structure, wherein the worm is the input end and the worm wheel is the output end, and it has a reverse self-locking characteristic. Once adjusted in place, the position of the entire tool holder body 210 will be firmly locked and will not deflect due to vibration, gravity or changes in the pressure of the scraper 220, which is beneficial to improving machining stability.

[0064] It should be noted that during operation, the adjusting handle 11 and the actuating component 3 work together. The user first controls the adjusting handle 11 to rotate the blade holder body 210, precisely adjusting the doctor blade 220 to maintain a high degree of parallelism with the coating roller 5 (i.e., setting a reference position). Then, the user controls the actuating component 3 to apply a stable and uniform pressure at this reference position, causing the doctor blade 220 to contact the coating roller 5. Subsequently, precise position control is achieved through the adjusting handle 11, and pressure control is achieved through the actuating component 3, resulting in higher operational accuracy.

[0065] In some embodiments, the microgravure coating apparatus 1000 further includes a feed roller 12 and a discharge roller 13 respectively disposed on both sides of the coating roller 5.

[0066] Specifically, the substrate to be coated is conveyed to the coating roller 5 via the feed roller 12, and the scraper assembly 2 scrapes off the excess coating material on the surface of the micro-grooved roller 104. Then, as the coating roller 5 rotates, it conveys a fixed amount of coating material in its cells to the substrate to be coated, forming a uniform coating layer on the surface of the substrate. The coating is then conveyed away from the micro-grooved coating device 1000 via the discharge roller 13, realizing an automated operation process and saving manpower.

[0067] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A microgravure coating apparatus, characterized in that, include: frame; A scraper assembly is rotatably coupled to the frame via a rotating mechanism. The scraper assembly includes a blade holder body and a scraper disposed on the blade holder body. The rotating mechanism includes rotating parts disposed at opposite ends of the blade holder body and rotating mating parts disposed on the frame accordingly. The rotating parts are rotatably connected to the rotating mating parts. An actuation assembly is connected to the frame and the tool holder body.

2. The microgravure coating apparatus according to claim 1, characterized in that, The rotating part includes rotating shafts respectively disposed at opposite ends of the tool holder body, and the rotating mating part includes a bearing seat disposed on the frame, and the rotating shaft is rotatably connected to the bearing seat.

3. The microgravure coating apparatus according to claim 2, characterized in that, The tool holder body is a column structure, and the tool holder body has mounting base surfaces located at opposite ends. The rotating shaft is disposed on the mounting base surface and protrudes outward.

4. The microgravure coating apparatus according to claim 3, characterized in that, The blade holder body has a first side and a second side connected between the two mounting bases, and the scraper is disposed on the first side; one end of the actuation component is connected to the second side.

5. The microgravure coating apparatus according to any one of claims 1-4, characterized in that, The actuation assembly includes an actuator, the two ends of which are respectively hinged to the scraper assembly and the frame. The actuator is used for telescopic movement to cause the scraper assembly to rotate relative to the frame.

6. The microgravure coating apparatus according to claim 5, characterized in that, The number of actuators is multiple, and the multiple actuators are arranged at intervals along the width direction of the scraper assembly.

7. The microgravure coating apparatus according to claim 2, characterized in that, The micro-grooving coating device further includes a limiting structure, which includes a limiting link disposed on the rotating shaft and rotating synchronously with the rotating shaft, and a first limiting member and a second limiting member disposed on the shaft seat; the limiting link has a first position that abuts against the first limiting member, corresponding to the highest raised position of the scraper; the limiting link has a second position that abuts against the second limiting member, corresponding to the lowest lowered position of the scraper.

8. The microgravure coating apparatus according to claim 7, characterized in that, The end of the rotating shaft away from the tool holder body protrudes outward from the shaft seat, and the portion of the rotating shaft protruding beyond the shaft seat is provided with the limiting link; the shaft seat is provided with a limiting mating seat, the first limiting member passes through the limiting mating seat and is used to limit the portion of the limiting link located on one side of the rotating shaft; the second limiting member passes through the limiting mating seat and is used to limit the portion of the limiting link located on the other side of the rotating shaft.

9. The microgravure coating apparatus according to claim 2, characterized in that, The micro-grooving coating device further includes a speed reduction assembly, which has an input end and an output end. The output end of the speed reduction assembly is connected to the rotating shaft, and the input end of the speed reduction assembly is provided with an adjustment handle. The adjustment handle is rotated n times to drive the rotating shaft to rotate 1 revolution through the speed reduction assembly, where n > 1.

10. The microgravure coating apparatus according to claim 2, characterized in that, The micro-grooving coating apparatus also includes a coating roller, and the width direction of the blade holder body is arranged parallel to the axial direction of the coating roller.

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