A controllable doctor blade coating device

Abstract

The utility model relates to scraper coating applicator control technical field, especially in kind of adjustable formula scraper coating device that avoids coating liquid accumulation, include: the rack that top plate and both side support board constitute, micrometer and manual fine adjustment knob are set up on top plate top, rotating support is set up in top plate bottom, micrometer and rotating support are connected with scraper top, rotating support is connected with manual fine adjustment knob, high accuracy screw thread propelling wire bar is set up in the horizontal sliding slot of both support board inside, support rod is set up in the vertical sliding slot of both support board inside, fixed mounting has fixed bayonet flat plate between the two support rods, coating liquid extruder and automatic control propeller are set up on fixed bayonet flat plate, and its coating liquid extruder can realize separate type installation with fixed bayonet flat plate. The design of the device not only improves the uniformity of coating significantly, but also effectively reduces the solvent evaporation problem caused by coating liquid accumulation.

Description

Technical Field

[0001] This utility model relates to the field of doctor blade coating technology, and in particular to an adjustable doctor blade coating device that avoids coating liquid accumulation. Background Technology

[0002] When operating a doctor blade coater, it must first be placed on a flatbed coater and work in conjunction with the feed bar fixed on the side plate to complete the coating process of various coating liquids on specific materials.

[0003] Currently, traditional doctor blade coating machines have the following technical defects in operation:

[0004] 1. Coating liquid accumulation problem: Excessive coating liquid needs to be applied to the substrate surface in advance, which can easily cause edge accumulation and increased viscosity due to solvent evaporation;

[0005] 2. Poor coating uniformity: Inaccurate adjustment of the gap or angle between the scraper and the substrate leads to uneven flow of the coating liquid, especially uncontrollable penetration into porous or rough substrates;

[0006] 3. Insufficient adaptability: It has weak dynamic control over highly volatile coating solutions, making it difficult to avoid excessive solvent evaporation through real-time adjustments. Utility Model Content

[0007] To address the aforementioned issues, this invention proposes an adjustable scraper coating device that integrates precision adjustment and intelligent control. Through a multi-dimensional control mechanism, it improves coating quality and solves problems such as coating liquid accumulation and uneven coating in existing technologies.

[0008] To achieve the above objectives, this utility model provides the following technology:

[0009] An adjustable doctor blade coating device includes: a frame consisting of a top plate and two side support plates; an adjustment device consisting of a distance adjustment knob, a micrometer, a manual fine-tuning knob, a rotating bracket, and a limit rod; and a coating liquid extrusion device consisting of a coating liquid extruder and an automatic control propeller. The frame is arranged sequentially from front to back as the coating liquid extrusion device, a high-precision threaded feed bar, and a doctor blade. The high-precision threaded feed bar is installed in a horizontal groove inside the support plate. The top and front ends of the two side support plates are respectively equipped with the top plate and the distance adjustment knob. The bottom end of the distance adjustment knob is connected to the high-precision threaded feed bar via a spring in the horizontal groove, thereby adjusting the distance between the high-precision threaded feed bar and the doctor blade and coating liquid extruder. A manual fine-tuning knob and a micrometer are installed on the top plate. The scraper is mounted and connected to the bottom of the micrometer and the rotating bracket. The bottom of the manual fine-tuning knob is connected to the top of the rotating bracket, and the bottom of the rotating bracket is connected to the top of the scraper, thus controlling the angle of the scraper through the manual fine-tuning knob. Furthermore, the bottom of the micrometer is connected to the top of the scraper, allowing for precise adjustment of the distance between the scraper and the flatbed coating machine, thereby effectively controlling the coating thickness.

[0010] In the aforementioned adjustable doctor blade coating device, vertical grooves are provided on the two side support plates, and the bottom ends of two L-shaped support rods are slidably disposed within the vertical grooves, allowing for vertical movement. A fixed bayonet plate is connected between the top ends of the two L-shaped support rods for mounting the coating liquid extrusion device.

[0011] In the aforementioned adjustable doctor blade coating device, a limiting rod is slidably mounted within the vertical grooves of the two side support plates. The screw head of the limiting rod is located on the outer side of the support plate, while the strip nut at the bottom of the limiting rod is positioned on the left side of the vertical groove (i.e., the inner side of the support plate). Furthermore, the bottom of the screw on the limiting rod is fixedly installed with a fixing plate, effectively preventing the screw from separating from the strip nut. Simultaneously, the entire limiting rod can slide freely up and down within the vertical groove. When the limiting rod slides to a predetermined position, the tightness between the support rod and the support plate can be adjusted by rotating the screw in the limiting rod, thereby controlling the height of the support rod and indirectly adjusting the height between the coating liquid extruder and the flatbed coating machine.

[0012] In the aforementioned adjustable scraper coating device, the top of the coating liquid extruder is separately connected to the fixed bayonet plate, and the coating liquid extruder is located at the front end of the high-precision threaded feed bar; the bottom of the automatic control feeder is fixed on the fixed bayonet plate, and the liquid supply is dynamically adjusted by setting the linear speed of the automatic control feeder, thereby effectively avoiding the accumulation of excessive coating liquid and achieving precise extrusion of the coating liquid.

[0013] The aforementioned adjustable scraper coating device further includes a rotating bracket in the adjusting device: a rotating bearing, a steering gear, an electronic steering controller (ECU), and a connecting rod. The rotating bearing is mounted on the top of the scraper, the steering gear is connected to the corresponding rotating bearing via the connecting rod, and the electronic steering controller (ECU) is located between the steering gear and the manual fine-tuning knob.

[0014] The aforementioned adjustable scraper coating device further includes a limiting rod for the adjusting device, comprising: a screw, a strip nut, and a fixing plate. The screw is fitted into the strip nut, and its bottom is fixedly connected to the fixing plate. The strip nut is located outside the vertical slide groove.

[0015] The adjustable doctor blade coating device described above, wherein the coating liquid extruder in the coating liquid extrusion device further includes the following components: a syringe and a slanted hollow body. The syringe is fixed to the slanted hollow body, and a toothed coating liquid extrusion port is provided at the bottom of the slanted hollow body. The side of the bottom of the slanted hollow body is provided with teeth. This structure and the coating liquid outlet at the bottom together constitute a toothed coating liquid extrusion port.

[0016] The aforementioned adjustable doctor blade coating device, wherein the automatic control propeller in the coating liquid extrusion device further comprises the following components: a motor, a stainless steel circular guide rail, a sliding bearing, a lead screw nut, a propulsion plate, a lead screw, and a controller. The motor is fixed by both fixed plates I and II, and fixed plates I and II, and fixed plates III and IV are fixed with screws. The two ends of the stainless steel circular guide rail are respectively fixed to fixed plates II and III. The bottom end of the lead screw is connected to fixed plates III and IV, and the top end is mounted on the motor. The sliding bearing is sleeved on the stainless steel circular guide rail, the lead screw nut is sleeved on the lead screw, the propulsion plate is fixedly connected to the sliding bearing and the lead screw nut, and the controller is connected to the motor.

[0017] The aforementioned adjustable scraper coating device includes a fixed bayonet plate comprising a sliding plate handle and a sliding plate. The sliding plate handle is disposed on the sliding plate, and by operating the sliding plate handle, the size of the opening between the two sliding plates can be adjusted, thereby achieving a separate connection with the coating liquid extruder.

[0018] Beneficial effects:

[0019] This invention, by equipping an automatically controlled propeller and coating liquid extruder, precisely controls the amount of coating liquid used, effectively preventing uneven coating and significant performance differences in different areas caused by excessive accumulation and penetration of coating material over a long period. Simultaneously, by adjusting the distance between the scraper and the high-precision threaded feed bar, as well as the height and angle of the scraper, and in conjunction with a stable and enclosed coating liquid extrusion device, the evaporation of highly volatile solvents in the coating liquid can be effectively prevented, and accumulation during coating and extrusion processes can be avoided, thus ensuring coating quality. Furthermore, the design of the limiting rod makes height adjustment of the coating liquid extruder more convenient. The operator can quickly and accurately adjust it to the ideal position according to actual needs, ensuring uniform extrusion of the coating liquid, thereby significantly improving the uniformity and stability of the coating effect. This height adjustment function not only enhances the flexibility of the device but also greatly improves work efficiency. Attached Figure Description

[0020] The accompanying drawings can further enhance the understanding of the utility model.

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a front view showing the connection relationship between the rotating bracket, the manual fine-tuning knob, and the scraper in this utility model;

[0023] Figure 3 This is a right view showing the connection between the rotating bracket, the manual fine-tuning knob, and the scraper in this utility model.

[0024] Figure 4 This is a top view showing the connection between the rotating bracket, the manual fine-tuning knob, and the scraper in this utility model.

[0025] Figure 5 This is an internal sectional view showing the connection between the rotating bracket, the manual fine-tuning knob, and the scraper in this utility model.

[0026] Figure 6 This is a cross-sectional view of the connection between the medium-distance adjustment knob and the high-precision threaded push rod of this utility model;

[0027] Figure 7 This is a schematic diagram showing the limiting state of the limiting rod on the support rod in this utility model;

[0028] Figure 8 for Figure 7 Right view of the effect of a single limiting rod on the support rod;

[0029] Figure 9 for Figure 7 A top view of the effect of a single limiting rod on the support rod;

[0030] Figure 10 This is a schematic diagram of the bayonet plate of this utility model;

[0031] Figure 11 This is a schematic diagram of the coating extruder of this utility model;

[0032] Figure 12 for Figure 11 The main view;

[0033] Figure 13 for Figure 11 The right view;

[0034] Figure 14 for Figure 11 Rear view;

[0035] Figure 15 This is a front view of the limiting rod in this utility model;

[0036] Figure 16 This is a left view of the limiting rod in this utility model;

[0037] Figure 17 This is a top view of the limiting rod in this utility model;

[0038] Figure 18 This is a front view of the automatic control thruster of this utility model;

[0039] Figure 19 This is a side view of the automatic control thruster of this utility model;

[0040] Figure label:

[0041] In the diagram: 1. High-precision threaded feed bar, 2. Scraper, 3. Support plate, 4. Distance adjustment knob, 5. Top plate, 6. Coating liquid extruder, 7. Micrometer, 8. Manual fine-tuning knob, 9. Rotating bracket, 10. Support rod, 11. Fixed bayonet plate, 12. Limit rod, 13. Automatic control feeder, 14. Motor, 15. Stainless steel circular guide rail, 16. Sliding bearing, 17. Lead screw nut, 18. Feed plate, 19. Lead screw, 20. Controller. 21. Vertical slide rail, 22. Sliding plate handle, 23. Sliding plate, 24. Syringe, 25. Hollow body with oblique cut, 26. Toothed coating liquid extrusion port, 27. Rotary bearing, 28. Steering gear, 29. Electronic steering controller (ECU), 30. Connecting rod, 31. Spring, 32. Horizontal slide rail, 33. Screw, 34. Strip nut, 35. Fixing plate, 36. Fixing plate I, 37. Fixing plate II, 38. Fixing plate III, 39. Fixing plate IV. Detailed Implementation

[0042] To make the technical solution and advantages of this utility model clearer, the embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0043] Example 1

[0044] This invention provides an adjustable doctor blade coating device to prevent the accumulation of coating liquid. Please refer to [link / reference]. Figure 1-19 The device includes a scraper 2, a top plate 5, a micrometer 7 and a manual fine-tuning knob 8 on the top plate 5, and a rotating bracket 9 below. The top of the scraper 2 is connected to the bottom of the micrometer 7. The user can precisely adjust the desired scraper height using the micrometer 7.

[0045] Furthermore, in this invention, a rotating bracket 9 is installed at the top of the scraper 2. The rotating bracket 9 includes a rotating bearing 27, a steering mechanism 28, and an electronic steering controller (ECU) 29. The rotating bearing 27 is directly installed at the top of the scraper 2, and the steering mechanism 28 is connected to the rotating bearing 27 via a connecting rod 30. The electronic steering controller (ECU) 29 is located between the steering mechanism 28 and the manual fine-tuning knob 8, and is responsible for connection and signal conversion functions. In actual use, the operator can rotate the manual fine-tuning knob 8 left and right. The electronic steering controller (ECU) 29 in the rotating bracket 9 transmits the signal from the manual fine-tuning knob 8 to the steering mechanism 28, which controls the rotating bearing 27 to adjust the angle of the scraper 2. In addition, during the coating process, the scraper angle can be adjusted in real time according to the flow of the coating liquid to cope with the blockage of the coating liquid.

[0046] Furthermore, in this invention, a support plate 3 is provided on each side of the top plate 5, and a distance adjustment knob 4 is installed at the front end of each support plate 3. The distance adjustment knob 4 is connected to the high-precision threaded feed bar 1 through a spring 31 in the horizontal groove 32 inside the support plate 3. When the distance adjustment knob 4 is rotated to the right, it pushes the high-precision threaded feed bar 1 to move backward, gradually approaching the scraper 2. When the distance adjustment knob 4 is rotated to the left, the high-precision threaded feed bar 1 is pulled towards one side of the coating liquid extruder 6 under the tension of the spring 31. With this design, during the coating process, the operator can precisely control the distance between the high-precision threaded feed bar 1, the scraper 2, and the coating liquid extruder 6 by rotating the distance adjustment knob 4 according to the degree of solvent evaporation, preventing the evaporation of highly volatile solvents in the coating liquid, thereby ensuring the uniformity and high quality of the coating.

[0047] Furthermore, in this utility model, vertical grooves 21 are provided on the two side support plates 3, and the bottom ends of the two support rods 10 are respectively slidably disposed in the vertical grooves 21 on the support plates 3, allowing the support rods 10 to move up and down within the vertical grooves 21 on the support plates 3. In addition, a limiting rod 12 is provided within the vertical grooves on the support plates. The head of the screw 33 in the limiting rod 12 is located on the right side of the vertical groove 21 (i.e., the outer side of the support plate 3), while the strip nut 34 at the bottom of the limiting rod 12 is placed on the left side of the vertical groove 21 on the support plate 3 (i.e., the inner side of the support plate), and the screw 33 is fitted onto the strip nut 34. The bottom of the screw 33 is fixedly connected to the fixing piece 35, thus preventing the screw 33 from separating from the strip nut 34 during operation. In specific operation, the tightness between the support rod 10 and the support plate 3 can be adjusted by rotating the screw 33 in the limiting rod 12, thereby controlling the height of the support rod.

[0048] Furthermore, in this invention, a fixed bayonet plate 11 is connected between the two support rods 10. The fixed bayonet plate 11 is provided with a sliding plate handle 22 and a sliding plate 23. In specific operation, firstly, the sliding plate 23 is slid outward and pulled open, then the coating liquid extruder 6 is installed on the fixed bayonet plate 11, then the sliding plate 23 is reset, and the coating liquid extruder 6 is ensured to be stable. This design facilitates the disassembly of the coating liquid extruder 6.

[0049] Furthermore, in this utility model, the coating liquid extruder 6 includes: a syringe 24, a slanted hollow body 25, and a toothed coating liquid extrusion port 26. The syringe 24 and the slanted hollow body 25 are fixedly connected, and the toothed coating liquid extrusion port 26 is located at the bottom end of the slanted hollow body 25, forming a whole. In specific use, the coating liquid extruder 6 is first injected into the slanted toothed hollow body 25 through the upper port of the syringe 24, and then the coating liquid extruder 6 is installed on the fixed bayonet plate 11 for subsequent use. During the coating process, the operator can first install the coating liquid extruder 6 filled with coating liquid on the fixed bayonet plate 11, and then adjust the tightness between the support rod 10 and the support plate 3 by rotating the screw 33 in the limiting rod 12, thereby realizing the height control of the support rod 10, and indirectly adjusting the distance between the coating liquid extruder 6 and the flat plate coating machine.

[0050] Furthermore, in this utility model, an automatic control pusher 13 is installed on the fixed buckle plate 11. This automatic control pusher 13 mainly consists of the following components: a motor 14, a stainless steel circular guide rail 15, a sliding bearing 16, a lead screw nut 17, a pusher plate 18, a lead screw 19, and a controller 20. The motor 14 is fixedly mounted on fixed plates I 36 and II 37, and fixed plates III 38 and IV 39 are fixed together with screws. The stainless steel circular guide rail 15 is stably fixed using fixed plates II 37 and III 38. The bottom end of the lead screw 19 is connected to fixed plates III 38 and IV 39, while its top end is mounted on the motor 14. The sliding bearing 16 is sleeved on the stainless steel circular guide rail 15, the lead screw nut 17 is sleeved on the lead screw 19, and the pusher plate 18 is fixedly connected to the sliding bearing 16 and the lead screw nut 17. The controller 20 is connected to the motor 14. The specific operating steps for coating are as follows: First, fix the coating liquid extruder 6, filled with coating liquid, onto the fixed bayonet plate 11 and adjust it to an appropriate height. Then, turn on the power and use the controller 20 to move the push plate 18 upward so that the plunger of the syringe 24 can be inserted into the syringe 24 in the coating liquid extruder 6. Next, use the controller 20 to set the pushing speed and distance, press the start button, and the motor 14 starts working, which drives the lead screw 19 to rotate, causing the lead screw nut 17 and its connected sliding bearing 16 to slide smoothly down the lead screw 19 and the stainless steel circular guide rail 15. Finally, precise control of the push plate 18 is achieved, so that it advances at the preset speed and distance, ensuring that the plunger of the syringe 24 moves evenly and continuously during the extrusion of the coating liquid, thereby significantly improving the quality and consistency of the coating.

[0051] Furthermore, the adjustable doctor blade coating device of this invention needs to be used in conjunction with a flatbed coating machine. Driven by the flatbed coating machine, the doctor blade 2 and the high-precision threaded feed bar 1 in the doctor blade coating device can slide in the horizontal direction to perform a secondary coating on the coating liquid extruded from the coating liquid extrusion device, so as to make the coating more uniform and thus complete the entire coating process.

[0052] The aforementioned flatbed coating machine is a commonly used instrument in existing technology. The adjustable blade coating device works in conjunction with the flatbed coating machine, and the coating process specifically consists of the following five steps:

[0053] Step 1: Equipment Installation and Initialization

[0054] Install the main body of the device at the designated position above the flatbed coating machine; inject the prepared coating liquid into the coating liquid extruder 6 and securely install it on the fixed bayonet plate 11; turn on the power of the equipment and move the push plate 18 upward to the preset height through the controller 20.

[0055] Step 2: Assembly of core components

[0056] The syringe plunger is accurately inserted into the syringe 24 cavity; the controller 20 is operated to slowly move the push plate 18 down until it is mechanically coupled with the syringe plunger.

[0057] Step 3: Precision parameter calibration

[0058] Use a micrometer 7 to precisely adjust the required vertical height of the scraper 2; adjust the angle of the scraper 2 in conjunction with the manual fine-tuning knob 8 and the rotating bracket 9; set the appropriate height of the coating liquid extruder 6 by using the support rod 10 and the limiting rod 12; according to the rheological characteristics of the coating liquid, rotate the distance adjustment knob 4 to precisely position the high-precision threaded feed bar 1 to the appropriate position; set process parameters such as feed speed, distance and extrusion volume on the controller 20 interface.

[0059] Step 4: Coating Operation

[0060] First, after connecting the main power and starting the equipment, the push plate 18 moves downward according to the parameters preset by the controller 20, uniformly extruding the coating liquid from the outlet of the coating liquid extruder 6 and coating it onto the surface of the substrate. Then, driven by the flatbed coating machine, the coating liquid extruder 6, the high-precision threaded push bar 1, and the scraper 2 in the scraper coating device move horizontally forward, uniformly coating the extruded coating liquid onto the surface of the material. During this process, the toothed structure at the outlet of the coating liquid extruder 6 and the self-rotating function of the high-precision threaded push bar 1 effectively prevent the accumulation of coating liquid. Finally, by monitoring the coating status in real time, the angle of the scraper 2 is dynamically adjusted by rotating the manual fine-tuning knob 8 to ensure a more uniform film formation.

[0061] Step 5: Operation terminated

[0062] Once the coating is completed, stop operation and perform equipment cleaning and maintenance according to standard procedures.

Claims

1. An adjustable blade coating device, characterized in that, include: The frame consists of a top plate (5) and two side support plates (3). The adjustment device consists of a distance adjustment knob (4), a micrometer (7), a manual fine adjustment knob (8), a rotating bracket (9), and a limit rod (12). The coating liquid extruder (6) and an automatic control pusher (13) constitute the coating liquid extrusion device. The coating liquid extrusion device, a high-precision threaded push bar (1), and a scraper (2) are arranged sequentially from front to back on the frame. The high-precision threaded push bar (1) is installed in the horizontal slide groove (32) inside the support plate (3). The top and front ends of the two side support plates (3) are respectively installed with... The top plate (5) and the distance adjustment knob (4) are connected to the high-precision threaded feed bar (1) by a spring (31) in the horizontal slide (32). The top plate (5) is equipped with a micrometer (7) and a manual fine adjustment knob (8). The scraper (2) is installed at the bottom of the micrometer (7) and the rotating bracket (9) and connected to them. The bottom of the manual fine adjustment knob (8) is connected to the top of the rotating bracket (9). The bottom of the rotating bracket (9) is connected to the top of the scraper (2). The bottom of the micrometer (7) is connected to the top of the scraper (2).

2. The controllable blade coater according to claim 1, wherein Vertical grooves (21) are provided on the two side support plates (3), and the bottom ends of the two L-shaped support rods (10) are slidably set in the vertical grooves (21). A fixed bayonet plate (11) is connected between the top ends of the two L-shaped support rods (10).

3. The controllable blade coater according to claim 2, wherein A limiting rod (12) is slidably installed in the vertical groove (21) opened in the two side support plates (3), and the head of the limiting rod (12) is located outside the support plate (3).

4. The controllable blade coater according to claim 1, wherein The top of the coating liquid extruder (6) is connected to the fixed bayonet plate (11) separately, and the bottom of the automatic control propeller (13) is fixed on the fixed bayonet plate (11).

5. The controllable blade coater according to claim 1, wherein The rotating bracket (9) in the adjustment device also includes: a rotating bearing (27), a steering gear (28), an electronic steering controller (ECU) (29), and a connecting rod (30). The rotating bearing (27) is installed on the top of the scraper (2). The steering gear (28) is connected to the corresponding rotating bearing (27) through the connecting rod (30). The electronic steering controller (ECU) (29) is located between the steering gear (28) and the manual fine-tuning knob (8).

6. The controllable blade coater according to claim 1, wherein The limiting rod (12) of the adjustment device also includes: screw (33), bar nut (34), and fixing plate (35); the screw (33) is fitted in the bar nut (34), and its bottom is fixedly connected to the fixing plate (35). The bar nut (34) is located outside the vertical slide groove (21).

7. The controllable blade coater according to claim 1, wherein The coating liquid extruder (6) in the coating liquid extrusion device also includes the following components: syringe (24) and oblique cut hollow body (25). The syringe (24) is fixed on the oblique cut hollow body (25). The bottom of the oblique cut hollow body (25) is provided with a toothed coating liquid extrusion port (26). The side of the bottom of the oblique cut hollow body (25) is provided with a tooth. The tooth and the coating liquid outlet at the bottom together constitute the toothed coating liquid extrusion port (26).

8. The controllable blade coater according to claim 1, wherein The automatic control thruster (13) also includes the following components: a motor (14), a stainless steel circular guide rail (15), a sliding bearing (16), a lead screw nut (17), a thrust plate (18), a lead screw (19), and a controller (20). The motor (14) is fixed by a fixing plate I (36) and a fixing plate II (37). The fixing plate I (36) and the fixing plate II (37), and the fixing plate III (38) and the fixing plate IV (39) are fixed by screws. The stainless steel circular guide rail (15) Both ends are fixed to the fixed plate II (37) and the fixed plate III (38) respectively; the bottom end of the lead screw (19) is connected to the fixed plate III (38) and the fixed plate IV (39), and the top end is installed on the motor (14); the sliding bearing (16) is sleeved on the stainless steel circular guide rail (15), the lead screw nut (17) is sleeved on the lead screw (19), the push plate (18) is fixedly connected to the sliding bearing (16) and the lead screw nut (17), and the controller (20) is connected to the motor (14).

9. The controllable blade coater according to claim 2, wherein The fixed bayonet plate (11) includes: a sliding plate handle (22) and a sliding plate (23), wherein the sliding plate handle (22) is disposed on the sliding plate (23).

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