Coating device

Abstract

The utility model discloses a coating device which comprises a machine frame, a coating roller assembly, a compression roller assembly and a liquid outlet assembly, the coating roller assembly, the compression roller assembly and the liquid outlet assembly are arranged on the machine frame, coating liquid of the liquid outlet assembly is coated on the coating roller assembly, and the compression roller assembly is used for applying pressure to the coating roller assembly. The coating roller assembly and the liquid outlet assembly are each provided with a temperature control device used for preventing viscous condensation of coating liquid, the liquid outlet assembly comprises a liquid bin, a discharging die, a gear pump and a discharging guide part, a discharging channel is formed in the discharging die, an inlet of the discharging channel is communicated with the liquid bin, the gear pump and the material storage cavity are arranged on the discharging channel in the discharging direction, and the gear pump and the material storage cavity are communicated with the discharging guide part. The discharging guide piece is connected to an outlet of the discharging channel of the discharging die and used for guiding the coating liquid, and the coating liquid in the liquid bin flows through the discharging channel and the discharging guide piece to reach the coating roller assembly. According to the utility model, the liquid medicine is extruded through the gear pump, the discharging speed is uniform, and the technical problem of non-uniform extrusion speed caused by higher viscosity and poorer flowability of the medicine corresponding to hot-melt coating is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of coating equipment, in particular to a coating device. Background Art

[0002] In the production of hot-melt patches, coating is an important link. Conventional equipment generally includes a frame, a liquid discharge device, a coating roller, and a pressure roller. The coating roller is wrapped with material, and the liquid medicine comes out of the liquid discharge device and reaches the material on the coating roller. The pressure roller applies pressure to position the material on the coating roller.

[0003] There is a conventional coating machine, which includes a feed bin, a guide plate and a scraper roller group. The guide plate is tilted, with one end located at the outlet of the feed bin and the other end located near the coating roller. After the glue in the feed bin flows out, it reaches the guide plate and then flows to the scraper roller group. The scraper roller on the scraper roller group scrapes the glue on the guide plate. The applicant found that in this technical solution, the scraper roller cannot scrape the glue uniformly. The feed bin and the scraper roller will be heated to ensure the heating effect of the glue, but the guide plate will not be heated. The guide plate is set relatively long, and the glue on the guide plate may solidify or semi-solidify during the flow process, resulting in poor flow of the glue. Therefore, a coating device with uniform and controllable discharge is required. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a coating device with uniform material discharge.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A coating device comprises a frame and a coating roller assembly, a pressure roller assembly and a liquid discharge assembly arranged on the frame, wherein the coating liquid of the liquid discharge assembly is coated on the coating roller assembly, the pressure roller assembly is used to apply pressure to the coating roller assembly, the coating roller assembly and the liquid discharge assembly are respectively provided with temperature control devices for preventing the viscosity of the coating liquid from condensing, the liquid discharge assembly comprises a liquid material bin, a discharge die, a gear pump and a discharge guide, a discharge channel is provided in the discharge die, the inlet of the discharge channel is connected with the liquid material bin, the gear pump and the storage cavity are arranged on the discharge channel along the discharge direction, the discharge guide is connected to the outlet of the discharge channel of the discharge die and is used to guide the coating liquid, and the coating liquid in the liquid material bin flows through the discharge channel and the discharge guide to reach the coating roller assembly.

[0007] The discharge guide is provided with a guide channel, the inlet of the guide channel is connected with the outlet of the discharge channel, and the inlet size of the guide channel is larger than the outlet size of the guide channel.

[0008] The material discharging guide comprises an upper plate and a lower plate, and a gap is provided between the upper plate and the lower plate, and the gap is a guide channel.

[0009] The coating device further comprises a first driving assembly and a limiting assembly, wherein the first driving assembly is connected below the liquid outlet assembly and is slidably connected to the frame, and the first driving assembly is used to drive the liquid outlet assembly to approach or move away from the coating roller assembly, and the limiting assembly is arranged on the frame and located below the liquid outlet assembly;

[0010] The first driving assembly is provided with a first wedge block on a side close to the coating roller assembly, and the limiting assembly includes a second wedge block, the wedge surface of the second wedge block matches the wedge surface of the first wedge block and the second wedge block can move up and down relative to the frame.

[0011] The first driving assembly includes a first mounting seat, a first driving member and a first slide rail, the upper and lower portions of the first slide rail are respectively connected to the first mounting seat and the frame, the first driving member is connected to the frame and is used to drive the first mounting seat to move closer to or away from the coating roller assembly, and the first wedge block is disposed on the first mounting seat.

[0012] The limiting assembly includes a second mounting seat and a first lead screw and a second driving member arranged on the second mounting seat. The second mounting seat is connected to the frame, the first lead screw is arranged in a vertical direction, the second driving member is used to drive the first lead screw to move, and the second wedge block is arranged on the first lead screw.

[0013] The first drive assembly also includes a third drive member and a third gear, the third drive member is used to drive the third gear to move, the liquid outlet assembly also includes a first gear, the first gear is coaxially arranged with a gear in the gear pump, and the first gear is meshed with the third gear for transmission.

[0014] The discharge die comprises an upper die and a lower die, the upper die and the lower die are oppositely provided with grooves, and the gear pump is located in the grooves.

[0015] The first driving assembly also includes a displacement sensor, which is arranged on the frame and is used to detect the horizontal displacement of the first mounting seat.

[0016] The coating roller assembly includes a fourth driving member, a coating roller and a rotating joint. The fourth driving member is used to drive the coating roller to rotate. Roller shafts are provided at both ends of the coating roller. The rotating joint is connected to the roller shaft. A medium flow channel is provided in the coating roller, and the medium flow channel is connected to the rotating joint.

[0017] Compared with the prior art, the advantages of the utility model are:

[0018] The coating device of the utility model arranges the gear pump in the discharge channel of the discharge die. After the medicine is injected into the liquid material bin, it directly enters the discharge channel of the discharge die through the action of gravity, enters the storage cavity through the gear pump, and finally squeezes out the medicine liquid through the discharge guide. Compared with the existing conventional means, the utility model extrude the medicine liquid through the gear pump, and the discharge speed is uniform, which solves the technical problem of uneven extrusion speed caused by the large viscosity and poor fluidity of the medicine corresponding to the hot-melt coating and the excessively long guide plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the coating device of the utility model.

[0020] Figure 2 It is a left view of the coating device of the utility model.

[0021] Figure 3 It is a front view of the coating device of the utility model.

[0022] Figure 4 It is a top view of the coating device of the utility model.

[0023] Figure 5 It is a front view of the first drive assembly of the utility model.

[0024] Figure 6 It is a left view of the first drive assembly of the utility model.

[0025] Figure 7 It is a right side view of the first drive assembly of the utility model.

[0026] Figure 8 It is a top view of the first drive assembly of the utility model.

[0027] Fig. 9 It is a side view of the limit assembly of the utility model.

[0028] Fig.10 It is the front view of the limit assembly of the utility model.

[0029] Fig.11 It is the front view of the liquid outlet component of the utility model.

[0030] Fig.12 yes Fig.11 Section view along line AA.

[0031] Fig.13 It is a structural schematic diagram of the coating roller assembly of the utility model.

[0032] Fig.14 It is a schematic diagram of the medium flow in the coating roller of the utility model.

[0033] Fig.15It is a structural schematic diagram of the pressure roller assembly of the utility model.

[0034] The symbols in the figure represent:

[0035] 1. Frame; 2. Coating roller assembly; 21. Rotary joint; 22. Bearing seat; 23. Coating roller; 231. Roller shaft; 24. Synchronous pulley; 25. Fourth driving member; 3. Pressing roller assembly; 31. Bearing cover; 32. Swing arm; 33. Pressing roller; 34. Rotating shaft; 35. Pressing roller bearing; 36. Rotating arm; 37. Fifth driving member; 4. Liquid discharge assembly; 41. First gear; 42. Liquid material bin; 43. Die head positioning member; 44. Turning member; 45. Discharging die; 451. Upper die; 452. Lower die ; 453, groove; 454, storage chamber; 46, gear pump; 47, discharge guide; 471, upper plate; 472, lower plate; 5, first drive assembly; 51, displacement sensor; 52, first wedge block; 53, first drive member; 54, first mounting seat; 55, first slide rail; 56, fourth gear; 57, third drive member; 58, third gear; 59, fifth gear; 6, limit assembly; 61, second mounting seat; 62, second wedge block; 63, first lead screw; 64, second drive member. DETAILED DESCRIPTION

[0036] The utility model will be described in further detail below. Unless otherwise specified, the instruments or materials used in the utility model are commercially available.

[0037] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0039] In the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] like Figures 1 to 15 As shown, the coating device of this embodiment includes a frame 1 and a coating roller assembly 2, a pressure roller assembly 3, and a liquid discharge assembly 4 arranged on the frame 1. The coating liquid of the liquid discharge assembly 4 is coated on the coating roller assembly 2. The pressure roller assembly 3 is used to apply pressure to the coating roller assembly 2. The coating roller assembly 2 and the liquid discharge assembly 4 are respectively provided with temperature control devices for preventing the viscosity of the coating liquid from condensing. The liquid discharge assembly 4 includes a liquid material bin 42, a discharge mold 45, a gear pump 46 and a discharge guide 47. A discharge channel is provided in the discharge mold 45, and the inlet of the discharge channel is connected to the liquid material bin 42. The gear pump 46 and the storage cavity 454 are arranged on the discharge channel along the discharge direction. The discharge guide 47 is connected to the outlet of the discharge channel of the discharge mold 45 and is used to guide the coating liquid. The coating liquid in the liquid material bin 42 flows through the discharge channel and the discharge guide 47 to reach the coating roller assembly 2.

[0041] The coating device of the utility model arranges the gear pump 46 in the discharge channel of the discharge die 45. After the medicine is injected into the liquid material bin 42, it directly enters the discharge channel of the discharge die 45 by gravity, enters the storage cavity 454 through the gear pump 46, and then the medicine liquid is squeezed out through the discharge guide 47. Compared with the existing conventional means, the utility model extrude the medicine liquid through the gear pump 46, and the extrusion speed is uniform, which solves the technical problem of uneven extrusion speed caused by the large viscosity and poor fluidity of the medicine corresponding to the hot-melt coating and the excessively long guide plate.

[0042] According to different production processes, the liquid material bin 42 can be designed with a jacket structure to realize the heating function of the liquid material bin 42 so that the drug always maintains a certain fluidity; at the same time, the discharge mold 45 is also designed with a flow channel to realize the temperature control requirement of the discharge mold 45.

[0043] like Fig.12 As shown, the discharge guide 47 is provided with a guide channel, the inlet of the guide channel is connected with the outlet of the discharge channel, and the inlet size of the guide channel is larger than the outlet size of the guide channel, so that the glue liquid gradually becomes thinner during the discharge process and the discharge is more uniform.

[0044] The discharge guide 47 includes an upper plate 471 and a lower plate 472 , and there is a gap between the upper plate 471 and the lower plate 472 , and the gap is a guide channel.

[0045] In this embodiment, the gap size near the discharge channel is larger than the gap size on the discharge channel side. In the flow direction of the liquid medicine, the upper surface of the upper plate 471 is tilted upward, and the lower surface of the lower plate 472 is horizontally set, so that the liquid medicine is pushed to flow out of the mold by the gear pump 46. In other embodiments, in the flow direction of the liquid medicine, the upper surface of the upper plate 471 is tilted upward, and the lower plate 472 is tilted downward, or in the flow direction of the liquid medicine, the upper plate 471 is horizontally set, and the lower plate 472 is tilted downward, which can also achieve the same or similar technical effects.

[0046] like Figures 5 to 10 As shown, the coating device also includes a first driving component 5 and a limiting component 6. The first driving component 5 is connected to the bottom of the liquid outlet component 4 and is slidably connected to the frame 1. The first driving component 5 is used to drive the liquid outlet component 4 to approach or move away from the coating roller component 2. The limiting component 6 is arranged on the frame 1 and is located below the liquid outlet component 4. The first driving component 5 is provided with a first wedge block 52 on the side close to the coating roller component 2. The limiting component 6 includes a second wedge block 62. The wedge surface of the second wedge block 62 cooperates with the wedge surface of the first wedge block 52 and the second wedge block 62 can move up and down relative to the frame 1. In this embodiment, the distance adjustment stroke of the liquid outlet component 4 approaching or away from the coating roller component 2 is shortened by the cooperation of the wedge surface and the wedge surface, avoiding the use of a cylinder to drive the screw rod to directly drive the coating steel roller to move for distance adjustment. Due to the large stroke of the screw rod, each adjustment of the distance is large, and the technical problem of not being able to meet the change of the small distance during glue coating is avoided.

[0047] The first driving assembly 5 includes a first mounting seat 54, a first driving member 53 and a first slide rail 55. The upper and lower parts of the first slide rail 55 are respectively connected to the first mounting seat 54 and the frame 1. The first driving member 53 is connected to the frame 1 and is used to drive the first mounting seat 54 to approach or move away from the coating roller assembly 2. The first wedge block 52 is arranged on the first mounting seat 54. The arrangement of the first slide rail 55 makes the movement friction of the first mounting seat 54 smaller and the sliding is smoother.

[0048] like Fig. 9 and 10 As shown, the limiting assembly 6 includes a second mounting seat 61 and a first lead screw 63 and a second driving member 64 arranged on the second mounting seat 61. The second mounting seat 61 is connected to the frame 1, the first lead screw 63 is arranged in the vertical direction, the second driving member 64 is used to drive the first lead screw 63 to move, and the second wedge block 62 is arranged on the first lead screw 63.

[0049] like Figures 5 to 8As shown, the first driving assembly 5 further includes a third driving member 57 and a third gear 58. The third driving member 57 is used to drive the third gear 58 to move. The liquid outlet assembly 4 further includes a first gear 41. The first gear 41 is coaxially arranged with a gear in the gear pump 46. The first gear 41 is meshed with the third gear 58 for transmission. The third driving member 57 drives the third gear 58 to move, thereby driving the first gear 41 to move. The gear of the gear pump 46 coaxially arranged with the first gear 41 will also rotate, thereby driving the glue to move.

[0050] In this embodiment, the first drive assembly 5 also includes a fourth gear 56 and a fifth gear 59. The fourth gear 56 is directly connected to the output end of the third drive member 57, the fifth gear 59 is meshed with the fourth gear 56, the fifth gear 59 is coaxial with the third gear 58 and the fifth gear 59 is located in the first mounting seat 54, the third gear 58 is located outside the first mounting seat 54, and the third drive member 57 and the fourth gear 56 are connected below the first mounting seat 54. With such a multi-gear transmission setting, on the one hand, the spatial layout of the device is more compact and the space utilization rate is higher. On the other hand, it is convenient to observe the rotation of the gear pump 46 and adjust the speed of the glue output.

[0051] like Fig.12 As shown, in this embodiment, the gear pump 46 is two gears meshing with each other, and the two gears are arranged up and down on the discharge channel.

[0052] In this embodiment, the discharge mold 45 includes an upper mold 451 and a lower mold 452, the discharge channel is located between the upper mold 451 and the lower mold 452, the upper mold 451 and the lower mold 452 are relatively provided with grooves 453, the grooves 453 are located on the discharge channel, and the gear pump 46 is located in the grooves 453, and the grooves 453 are located in the upstream direction of the storage cavity 454. Compared with the integral design of the discharge mold 45, the separate design of the upper mold 451 and the lower mold 452 is more convenient for the installation of the gear pump 46, and is also more convenient for the disassembly and cleaning of the inside of the discharge mold 45. At the same time, the gear pump 46 in the groove 453 pushes the glue liquid to the storage cavity 454 for storage and buffering. When the glue liquid in the storage cavity 454 is stored to a certain capacity, the glue liquid begins to move to the outlet of the discharge channel.

[0053] In this embodiment, the third gear 58 is symmetrically arranged, and the gear pump 46 adopts the synchronous driving mode of the third gears 58 on both sides. The liquid outlet assembly 4 is installed on the first drive assembly 5. The first drive assembly 5 positions the entire discharge die 45 and the coating roller 23. During production, the third drive member 57 drives the fourth gear 56 to transmit power to the third gears 58 on both sides through the transition fifth gear 59; the third gear 58 transmits power to the first gear 41 to drive the gear pump 46 so that the drug is continuously delivered to the outlet.

[0054] like Figure 1As shown, the liquid discharge assembly 4 also includes a flip part 44, and the upper mold 451 and the lower mold 452 are connected by a hinge, and the flip part 44 is connected to the hinge. The setting of the flip part 44 makes it easier to disassemble the upper mold 451 and the lower mold 452, and it is convenient to clean the discharge mold 45. When cleaning after the production is completed, the upper liquid material bin 42 is removed, and the connecting screws on the hinge of the upper mold 451 and the lower mold 452 are removed. The upper mold 451 can be easily rotated and flipped up to separate from the lower mold 452 through the flip part 44, without having to dismantle it completely, reducing the entire cleaning work time and disassembly difficulty.

[0055] The liquid discharge assembly 4 further includes a die head positioning member 43 , and the die head positioning member 43 is symmetrically arranged on both sides of the discharge die 45 .

[0056] In this embodiment, the first driving assembly 5 further includes a displacement sensor 51 , which is disposed on the frame 1 and is used to detect the horizontal displacement of the first mounting seat 54 .

[0057] like Fig.13 and 14 As shown, the coating roller assembly 2 includes a fourth driving member 25, a coating roller 23 and a rotary joint 21. The fourth driving member 25 is used to drive the coating roller 23 to rotate. Roller shafts 231 are provided at both ends of the coating roller 23. The rotary joint 21 is connected to the roller shaft 231. A medium flow channel is provided in the coating roller 23, and the medium flow channel is connected to the rotary joint 21. A cold source or a heat source can be introduced through the rotary joint 21 and the medium flow channel to facilitate temperature control of the coating roller 23.

[0058] In this embodiment, the coating roller assembly 2 also includes a bearing seat 22 and a synchronous pulley 24. The roller shaft 231 is installed on the frame 1 through the bearing seat 22. One end of the synchronous pulley 24 is connected to the output end of the fourth driving member 25, and the other end is sleeved on the roller shaft 231.

[0059] The coating roller 23 adopts a jacket double-layer structure design. According to different production processes, the entry and exit of heat sources or cold sources can be increased to achieve control of the temperature of the coating roller 23.

[0060] like Fig.15 As shown, the pressure roller assembly 3 includes a fifth driving member 37, a pressure roller 33, and a rotating shaft 34. The pressure roller 33, the rotating shaft 34, and the coating roller 23 are arranged in parallel. The pressure roller 33 is connected to the rotating shaft 34, and the rotating shaft 34 is connected to the frame 1 and can rotate relative to the frame 1. The fifth driving member 37 is used to drive the rotating shaft 34 to rotate and drive the pressure roller 33 to move closer to or away from the coating roller 23.

[0061] The pressure roller assembly 3 further includes a swing arm 32 , one end of which is connected to the output end of the fifth driving member 37 , and the other end of which is connected to the rotating shaft 34 .

[0062] The pressure roller assembly 3 further includes a pressure roller bearing 35, and the rotating shaft 34 is connected to the frame 1 via the pressure roller bearing 35. In this embodiment, a bearing cover 31 is sleeved on the rotating shaft 34 at one end away from the fifth driving member 37 to isolate external dust.

[0063] The pressure roller assembly 3 further includes a rotating arm 36 , one end of which is hinged to the output end of the fifth driving member 37 , and the other end of which is connected to the rotating shaft 34 , thereby driving the rotating shaft 34 to rotate.

[0064] Each driving member is a driving motor or a driving cylinder.

[0065] The liquid outlet assembly 4 is first installed on the first drive assembly 5. According to the different parameters of the production products, the first drive assembly 5 adjusts the gap with the coating roller assembly 2 to meet the production process requirements. During the entire adjustment process, the first drive member 53 (moving cylinder) is started to push the first mounting seat 54 close to the coating roller 23. When the first wedge block 52 contacts the second wedge block 62, the first drive member 53 will always keep pressure on the entire second wedge block 62; at this time, the second drive member 64 (motor) starts to drive the first lead screw 63 to rotate, and the first lead screw 63 drives the second wedge block 62 to move up and down, because the first wedge block 52 always keeps close to the second wedge block 62. Therefore, the resistance of the first drive member 53 will be overcome here to make the first mounting seat 54 fine-tuned forward and backward until the displacement sensor 51 displays the correct value, and the gap adjustment of the system is completed.

[0066] The limiting assembly 6 is arranged with two sets of corresponding displacement sensors 51 and two sets are also installed. The whole system can realize single-side adjustment and double-side adjustment at the same time, which can well ensure the gap between the liquid outlet assembly 4 and the coating roller assembly 2.

[0067] Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the art can use the above disclosed technical content to make many possible changes and modifications to the technical solution of the present invention without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A coating device, comprising a frame (1) and a coating roller assembly (2), a pressure roller assembly (3), and a liquid outlet assembly (4) arranged on the frame (1), wherein the coating liquid of the liquid outlet assembly (4) is coated on the coating roller assembly (2), and the pressure roller assembly (3) is used to apply pressure to the coating roller assembly (2), characterized in that: The coating roller assembly (2) and the liquid discharge assembly (4) are respectively provided with temperature control devices for preventing the viscosity of the coating liquid from condensing. The liquid discharge assembly (4) comprises a liquid material bin (42), a discharge die (45), a gear pump (46) and a discharge guide (47). A discharge channel is provided in the discharge die (45), and the inlet of the discharge channel is connected to the liquid material bin (42). The gear pump (46) and the material storage chamber (454) are arranged on the discharge channel along the discharge direction. The discharge guide (47) is connected to the outlet of the discharge channel of the discharge die (45) and is used to guide the coating liquid. The coating liquid in the liquid material bin (42) flows through the discharge channel and the discharge guide (47) to reach the coating roller assembly (2).

2. The coating device according to claim 1, characterized in that: The discharge guide (47) is provided with a guide channel, the inlet of the guide channel is connected to the outlet of the discharge channel, and the size of the inlet of the guide channel is larger than the size of the outlet of the guide channel.

3. The coating device according to claim 2, characterized in that: The material discharge guide (47) comprises an upper plate (471) and a lower plate (472), and a gap is provided between the upper plate (471) and the lower plate (472), and the gap serves as a guide channel.

4. The coating device according to claim 1, characterized in that: The coating device further comprises a first driving assembly (5) and a limiting assembly (6); the first driving assembly (5) is connected below the liquid outlet assembly (4) and is slidably connected to the frame (1); the first driving assembly (5) is used to drive the liquid outlet assembly (4) to move closer to or away from the coating roller assembly (2); the limiting assembly (6) is arranged on the frame (1) and is located below the liquid outlet assembly (4); The first driving assembly (5) is provided with a first wedge-shaped block (52) on a side close to the coating roller assembly (2), and the limiting assembly (6) comprises a second wedge-shaped block (62), the wedge-shaped surface of the second wedge-shaped block (62) matches the wedge-shaped surface of the first wedge-shaped block (52), and the second wedge-shaped block (62) can move up and down relative to the frame (1).

5. The coating device according to claim 4, characterized in that: The first driving assembly (5) comprises a first mounting seat (54), a first driving member (53) and a first slide rail (55); the upper and lower parts of the first slide rail (55) are respectively connected to the first mounting seat (54) and the frame (1); the first driving member (53) is connected to the frame (1) and is used to drive the first mounting seat (54) to move closer to or away from the coating roller assembly (2); and the first wedge block (52) is arranged on the first mounting seat (54).

6. The coating device according to claim 5, characterized in that: The limiting assembly (6) comprises a second mounting seat (61), a first lead screw (63) and a second driving member (64) arranged on the second mounting seat (61); the second mounting seat (61) is connected to the frame (1); the first lead screw (63) is arranged in a vertical direction; the second driving member (64) is used to drive the first lead screw (63) to move; and the second wedge block (62) is arranged on the first lead screw (63).

7. The coating device according to claim 5, characterized in that: The first drive assembly (5) further comprises a third drive member (57) and a third gear (58), wherein the third drive member (57) is used to drive the third gear (58) to move. The liquid outlet assembly (4) further comprises a first gear (41), wherein the first gear (41) is coaxially arranged with a gear in the gear pump (46), and the first gear (41) is meshed with the third gear (58) for transmission.

8. The coating device according to claim 7, characterized in that: The discharge die (45) comprises an upper die (451) and a lower die (452); the upper die (451) and the lower die (452) are provided with grooves (453) opposite to each other; and the gear pump (46) is located in the groove (453).

9. The coating device according to claim 7, characterized in that: The first driving assembly (5) further comprises a displacement sensor (51), wherein the displacement sensor (51) is arranged on the frame (1) and is used to detect the horizontal displacement of the first mounting seat (54).

10. The coating device according to any one of claims 1 to 9, characterized in that: The coating roller assembly (2) comprises a fourth driving member (25), a coating roller (23) and a rotary joint (21); the fourth driving member (25) is used to drive the coating roller (23) to rotate; roller shafts (231) are provided at both ends of the coating roller (23); the rotary joint (21) is connected to the roller shaft (231); a medium flow channel is provided in the coating roller (23); and the medium flow channel is connected to the rotary joint (21).

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