Adjusting device for the gap between an extrusion head and a coating roller

Abstract

The application discloses a kind of adjusting device of extrusion head and coating roller gap, belong to coating machine technical field, including second bearing metal plate, the upper portion of second bearing metal plate is provided with distance adjustment mechanism, the upper surface of second bearing metal plate both ends is provided with a plurality of first bearing metal plate for supporting and fixing distance adjustment mechanism to play the role, distance adjustment mechanism includes the distance adjustment component for the position adjustment effect of extrusion head, the power output component for the support and driving effect of distance adjustment component, adjustable fixing component for cooperating power output component to distance adjustment component play the role of fixed and position adjustment;Through the cooperation of multiple structures, user can carry out high-precision fine adjustment to the position of extrusion head by adjusting device, so that the adjustment accuracy of adjusting device is higher, secondly, the application can be suitable for different models of extrusion head, so that the application range of adjusting device is more extensive.

Description

Technical Field

[0001] This invention belongs to the field of coating machine technology, specifically relating to an adjustment device for the gap between the extrusion head and the coating roller. Background Technology

[0002] Coating machines are mainly used for surface coating processes of films, paper, etc. This machine coats a roll of substrate with a layer of adhesive, paint or ink with a specific function, and after drying, cuts it into sheets or rolls it up. When adjusting the gap between the extrusion head and the coating roller on the coating machine, a corresponding adjustment device is used.

[0003] Traditional adjustment devices include a servo motor, a longitudinal push cylinder, a motor mounting plate, a coupling, a ball screw, a transverse roller guide, an oblique roller guide, a fine-tuning block, a linear guide, and a limiting mechanism. The advantage of this adjustment device is that it can adjust the position of the extrusion head.

[0004] However, traditional adjustment devices have relatively simple adjustment structures, resulting in poor adjustment accuracy. This makes it impossible for users to make high-precision fine adjustments to the position of the extrusion head according to actual usage needs, and there is an urgent need for improvement. Summary of the Invention

[0005] The purpose of this invention is to provide an adjustment device for the gap between the extrusion head and the coating roller, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an adjustment device for the gap between an extrusion head and a coating roller, comprising a second bearing metal plate, a distance adjustment mechanism being disposed above the second bearing metal plate, and a plurality of first bearing metal plates being disposed at both ends of the upper surface of the second bearing metal plate for supporting and fixing the distance adjustment mechanism. The distance adjustment mechanism includes a distance adjustment component for adjusting the position of the extrusion head, a power output component for supporting and driving the distance adjustment component, and an adjustable fixing component for cooperating with the power output component to fix and adjust the position of the distance adjustment component. The distance adjustment component is sleeved on the power output component, and the adjustable fixing components are disposed at both ends of the distance adjustment component.

[0007] As a further aspect of the present invention: the power output component includes a hollow liquid storage tube, the interior of which is filled with transmission fluid for transmission, a plurality of pressure relief holes are provided in the middle of the hollow liquid storage tube, a fourth bearing metal plate is provided at both ends of the hollow liquid storage tube, the fourth bearing metal plate is fixedly connected to the hollow liquid storage tube, and a retractable driving component corresponding to the hollow liquid storage tube is provided at the bottom of the fourth bearing metal plate, the telescopic end of the retractable driving component is fixedly connected to a second adjustable sealing plug that is slidably and sealingly connected to the hollow liquid storage tube.

[0008] As a further embodiment of the present invention: both ends of the hollow liquid storage tube are provided with annular seals corresponding to the retractable drive component. The annular seals are fixedly connected to the retractable drive component. Several sound-emitting air supply pipes for conveying air and providing warning are provided on the annular seals. The sound-emitting air supply pipes pass through the annular seals.

[0009] As a further embodiment of the present invention: the distance adjustment component includes a limiting pressure dividing cylinder, and a plurality of limiting support cylinders are provided at both ends of the limiting pressure dividing cylinder. The limiting support cylinders are provided through the side wall of the limiting pressure dividing cylinder and are fixedly connected to the limiting pressure dividing cylinder. A transmission piston rod is slidably connected to the bottom of the limiting support cylinder, and an adjustable metal plate is provided at the end of the transmission piston rod away from the limiting pressure dividing cylinder.

[0010] As a further embodiment of the present invention: a third bearing metal plate is provided on the side of the limiting support cylinder away from the limiting pressure dividing cylinder, and a limiting metal track that is slidably connected to the side of the third bearing metal plate facing the transmission piston rod is fixedly connected to the side of the third bearing metal plate, and a number of fastening screws corresponding to the limiting metal track are threadedly connected to the adjustable metal plate.

[0011] As a further embodiment of the present invention: a limiting pressure relief cylinder is provided at one end of the limiting pressure relief cylinder away from the second bearing metal plate, and a sound-relieving pressure pipe is provided at the other end of the limiting pressure relief cylinder away from the limiting pressure relief cylinder. The sound-relieving pressure pipe is provided through the side wall of the limiting pressure relief cylinder and is fixedly connected to the limiting pressure relief cylinder. A first adjustable sealing plug is slidably connected inside the limiting pressure relief cylinder, and a retractable limiting member is provided inside the limiting pressure relief cylinder for driving the first adjustable sealing plug to move away from the sound-relieving pressure pipe.

[0012] As a further embodiment of the present invention: the retractable limiting member is a spring or a metal sheet, one end of the retractable limiting member is fixedly connected to the first adjustable sealing plug, and the other end of the retractable limiting member is fixedly connected to the limiting pressure relief cylinder.

[0013] As a further embodiment of the present invention: the adjustable fixing component includes an adjustable fixing tube, which is fixedly connected to a limiting pressure dividing cylinder, and is slidably connected to a hollow liquid storage tube. A limiting fixing cylinder is fixedly connected to one end of the adjustable fixing tube away from the limiting pressure dividing cylinder, and a plurality of transmission screws are threaded onto the limiting fixing cylinder.

[0014] As a further embodiment of the present invention: a deformable mounting tube is provided inside the limiting and fixing cylinder, the deformable mounting tube is rotatably connected to the limiting and fixing cylinder, and an elastic reinforcing tube corresponding to the hollow liquid storage tube is fixedly connected inside the deformable mounting tube, the elastic reinforcing tube is fixedly connected to the deformable mounting tube.

[0015] Compared with the prior art, the beneficial effects of the present invention are: the present invention has a simple structure and is easy to use. Through the cooperation of multiple structures, users can make high-precision fine adjustments to the position of the extrusion head through the adjustment device, making the adjustment accuracy of the adjustment device higher. Secondly, the present invention can be applied to different models of extrusion heads, making the application range of the adjustment device wider. In addition, the present invention has buffer protection and warning functions, which can effectively avoid over-adjustment of the extrusion head, making the function of the adjustment device more abundant. It is worth promoting and using. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a device for adjusting the gap between an extrusion head and a coating roller.

[0017] Figure 2 This is a schematic diagram of the distance adjustment mechanism in a device for adjusting the gap between an extrusion head and a coating roller;

[0018] Figure 3 This is a schematic diagram of the distance adjustment component in a device for adjusting the gap between an extrusion head and a coating roller;

[0019] Figure 4 This is a schematic diagram of the power output component in an adjustment device for the gap between an extrusion head and a coating roller.

[0020] Figure 5 This is a schematic diagram of the adjustable fixing component in an adjustment device for the gap between an extrusion head and a coating roller.

[0021] Figure 6 This is a schematic diagram of the limiting and fixing cylinder in an adjustment device for the gap between an extrusion head and a coating roller;

[0022] In the diagram: 1-First bearing metal plate, 2-Second bearing metal plate, 3-Distance adjustment mechanism, 31-Distance adjustment assembly, 33-Power output assembly, 35-Adjustable fixing assembly, 310-Transmission piston rod, 311-First adjustable sealing plug, 312-Limiting pressure relief cylinder, 313-Limiting pressure dividing cylinder, 314-Limiting metal track, 315-Third bearing metal plate, 316-Adjustable metal plate, 317-Retractable limiting component, 318-Sound vent Pressure tube, 319-Fasting screw, 320-Limiting support cylinder, 330-Hollow liquid storage tube, 331-Pressure relief hole, 332-Transmission fluid, 333-Extendable drive component, 334-Second adjustable sealing plug, 335-Fourth bearing metal plate, 336-Annular seal, 337-Sounding air supply tube, 350-Deformable installation tube, 351-Elastic reinforcing tube, 352-Limiting fixing cylinder, 353-Transmission screw, 354-Adjustable fixing tube. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "connection", "linking", and "setting" should be interpreted broadly. For example, they can refer to fixed connection or setting, detachable connection or setting, or integral connection or setting.

[0025] Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0026] Please see Figure 1 and Figure 2 This embodiment provides an adjustment device for the gap between the extrusion head and the coating roller, including a second supporting metal plate 2. A distance adjustment mechanism 3 is provided above the second supporting metal plate 2. Several first supporting metal plates 1 are provided at both ends of the upper surface of the second supporting metal plate 2 for supporting and fixing the distance adjustment mechanism 3. The distance adjustment mechanism 3 includes a distance adjustment component 31 for adjusting the position of the extrusion head, a power output component 33 for supporting and driving the distance adjustment component 31, and an adjustable fixing component 35 for cooperating with the power output component 33 to fix and adjust the position of the distance adjustment component 31. The distance adjustment component 31 is sleeved on the power output component 33, and the adjustable fixing component 35 is provided at both ends of the distance adjustment component 31.

[0027] Please see Figure 1 , Figure 2 and Figure 4In one embodiment, to make the use of the power output assembly 33 more reliable, preferably, the power output assembly 33 includes a hollow liquid storage tube 330, the interior of which is filled with a transmission fluid 332 for transmission. The transmission fluid 332 is hydraulic oil. Several pressure relief holes 331 are provided in the middle of the hollow liquid storage tube 330. Fourth supporting metal plates 335 are provided at both ends of the hollow liquid storage tube 330, and the fourth supporting metal plates 335 are fixedly connected to the hollow liquid storage tube 330. The bottom of the fourth supporting metal plates 335 is provided with a connection to the hollow liquid storage tube 330. The telescopic drive component 333 corresponds to 30. The telescopic drive component 333 is an electric telescopic rod. The telescopic end of the telescopic drive component 333 is fixedly connected to a second adjustable sealing plug 334 that is slidably connected to the hollow liquid storage tube 330. Both ends of the hollow liquid storage tube 330 are provided with annular seals 336 corresponding to the telescopic drive component 333. The annular seals 336 are fixedly connected to the telescopic drive component 333. Several sound-emitting air supply pipes 337 are provided on the annular seals 336 for the purpose of air supply and warning. The sound-emitting air supply pipes 337 pass through the annular seals 336.

[0028] In another embodiment, the power output assembly 33 includes a hollow liquid storage tube 330, the interior of which is filled with a transmission fluid 332 for transmission purposes. The transmission fluid 332 is mineral oil. Several pressure relief holes 331 are provided in the middle of the hollow liquid storage tube 330. Fourth supporting metal plates 335 are provided at both ends of the hollow liquid storage tube 330 and are fixedly connected to the hollow liquid storage tube 330. A retractable drive member 3 corresponding to the hollow liquid storage tube 330 is provided at the bottom of the fourth supporting metal plate 335. 33. The retractable drive component 333 is a hydraulic cylinder. The telescopic end of the retractable drive component 333 is fixedly connected to a second adjustable sealing plug 334 that is slidably connected to the hollow liquid storage tube 330. Both ends of the hollow liquid storage tube 330 are provided with annular seals 336 corresponding to the retractable drive component 333. The annular seals 336 are fixedly connected to the retractable drive component 333. Several sound-emitting air supply pipes 337 are provided on the annular seals 336 for the purpose of air supply and warning. The sound-emitting air supply pipes 337 pass through the annular seals 336.

[0029] Please see Figure 1 , Figure 2 and Figure 3In one embodiment, to make the use of the distance adjustment component 31 more reliable, the distance adjustment component 31 preferably includes a limiting pressure dividing cylinder 313. Several limiting support cylinders 320 are provided at both ends of the limiting pressure dividing cylinder 313. The limiting support cylinders 320 penetrate the side wall of the limiting pressure dividing cylinder 313 and are fixedly connected to the limiting pressure dividing cylinder 313. A transmission piston rod 310 is slidably connected to the bottom of the limiting support cylinder 320. An adjustable metal plate 316 is provided at the end of the transmission piston rod 310 away from the limiting pressure dividing cylinder 313. A third bearing metal plate 315 is provided on the side of the limiting support cylinder 320 away from the limiting pressure dividing cylinder 313. A limiting metal rail 314, which is slidably connected to the adjustable metal plate 316, is fixedly connected to the side of the third bearing metal plate 315 facing the transmission piston rod 310. Several fastening screws 319 corresponding to the limiting metal rail 314 are threaded onto the adjustable metal plate 316.

[0030] Please see Figure 3 In one embodiment, to enrich the functionality of the distance adjustment component 31, preferably, a pressure relief cylinder 312 is provided at the end of the pressure relief cylinder 313 away from the second bearing metal plate 2, and a sound relief pipe 318 is provided at the end of the pressure relief cylinder 312 away from the pressure relief cylinder 313. The sound relief pipe 318 penetrates the side wall of the pressure relief cylinder 312 and is fixedly connected to the pressure relief cylinder 312. A first adjustable sealing plug 311 is slidably connected inside the pressure relief cylinder 312. A retractable limiting member 317 is provided inside the pressure relief cylinder 312 to drive the first adjustable sealing plug 311 to move away from the sound relief pipe 318. The retractable limiting member 317 is a spring, one end of the retractable limiting member 317 is fixedly connected to the first adjustable sealing plug 311, and the other end of the retractable limiting member 317 is fixedly connected to the pressure relief cylinder 312.

[0031] In another embodiment, the distance adjustment assembly 31 includes a limiting pressure dividing cylinder 313. Several limiting support cylinders 320 are provided at both ends of the limiting pressure dividing cylinder 313. The limiting support cylinders 320 penetrate the side wall of the limiting pressure dividing cylinder 313 and are fixedly connected to the limiting pressure dividing cylinder 313. A transmission piston rod 310 is slidably connected to the bottom of the limiting support cylinder 320. An adjustable metal plate 316 is provided at the end of the transmission piston rod 310 away from the limiting pressure dividing cylinder 313. A limiting pressure relief cylinder 312 is provided at the end of the limiting pressure dividing cylinder 313 away from the second bearing metal plate 2. A sound-relieving pressure relief pipe 318 is provided, which penetrates the side wall of the limiting pressure relief cylinder 312. The sound-relieving pressure relief pipe 318 is fixedly connected to the limiting pressure relief cylinder 312. The limiting pressure relief cylinder 312 is internally sealed and slidably connected to a first adjustable sealing plug 311. The limiting pressure relief cylinder 312 is internally provided with a retractable limiting member 317 for driving the first adjustable sealing plug 311 to move away from the sound-relieving pressure relief pipe 318. The retractable limiting member 317 is a metal spring. One end of the retractable limiting member 317 is fixedly connected to the first adjustable sealing plug 311, and the other end of the retractable limiting member 317 is fixedly connected to the limiting pressure relief cylinder 312.

[0032] Please see Figure 1 , Figure 2 , Figure 5 and Figure 6 In one embodiment, to make the use of the adjustable fixing component 35 more reliable, the adjustable fixing component 35 preferably includes an adjustable fixing tube 354, which is fixedly connected to the limiting pressure dividing cylinder 313 and is slidably connected to the hollow liquid storage tube 330. A limiting fixing cylinder 352 is fixedly connected to one end of the adjustable fixing tube 354 away from the limiting pressure dividing cylinder 313. Several transmission screws 353 are threaded on the limiting fixing cylinder 352. A deformable installation tube 350 is provided inside the limiting fixing cylinder 352. The deformable installation tube 350 is a plastic tube and is rotatably connected to the limiting fixing cylinder 352. An elastic reinforcing tube 351 corresponding to the hollow liquid storage tube 330 is fixedly connected inside the deformable installation tube 350. The elastic reinforcing tube 351 is a rubber tube and is fixedly connected to the deformable installation tube 350.

[0033] In another embodiment, the adjustable fixing component 35 includes an adjustable fixing tube 354, which is fixedly connected to the limiting pressure dividing cylinder 313. The adjustable fixing tube 354 is also sealed and slidably connected to the hollow liquid storage tube 330. A limiting fixing cylinder 352 is fixedly connected to one end of the adjustable fixing tube 354 away from the limiting pressure dividing cylinder 313. Several transmission screws 353 are threaded onto the limiting fixing cylinder 352. A deformable mounting tube 350, which is an aluminum tube, is provided inside the limiting fixing cylinder 352. An elastic reinforcing tube 351, which is corresponding to the hollow liquid storage tube 330, is fixedly connected inside the deformable mounting tube 350. The elastic reinforcing tube 351 is a silicone tube and is fixedly connected to the deformable mounting tube 350.

[0034] The working principle and usage process of this invention: Before use, the second bearing metal plate 2 is installed and fixed, and then the transmission screw 353 is loosened. At this time, the adjustable fixing tube 354 can rotate 360° relative to the hollow liquid storage tube 330 (the adjustable fixing tube 354 can also move laterally relative to the hollow liquid storage tube 330), thereby allowing the limiting pressure dividing cylinder 313 to rotate 360° relative to the hollow liquid storage tube 330. This makes it easier for users to adjust the adjustment device according to actual installation requirements (different relative positions of the adjustment device and the extrusion head result in different driving directions of the adjustment device to the extrusion head, so targeted adjustment is required), making the application range of the adjustment device wider.

[0035] Loosen the fastening screw 319 with a wrench, and then adjust the spacing between the two third bearing metal plates 315 to suit different models of extrusion heads. After adjustment, tighten the fastening screw 319 and fix the extrusion head to the third bearing metal plate 315 with bolts to achieve suitable installation of the adjustment device.

[0036] When it is necessary to reduce the gap between the extrusion head and the coating roller, the telescopic drive 333 is extended. At this time, the second adjustable sealing plug 334 moves closer to each other. At this time, external air enters the end of the hollow liquid storage tube 330 through the sound supply pipe 337, causing the sound supply pipe 337 to emit a warning sound due to the air flow, thereby alerting nearby personnel. At the same time, the movement of the two second adjustable sealing plugs 334 compresses the transmission fluid 332 in the hollow liquid storage tube 330, causing part of the transmission fluid 332 in the hollow liquid storage tube 330 to pass through the pressure relief hole 331 into the limiting pressure dividing cylinder 313. Since the limiting pressure dividing cylinder 313 itself is filled with transmission fluid 332, the excess transmission fluid 332 drives the transmission piston rod 310 to move away from the hollow liquid storage tube 330, thereby reducing the gap between the extrusion head and the coating roller. Similarly, when the telescopic drive 333 is retracted, the gap between the extrusion head and the coating roller increases.

[0037] Secondly, since the diameter of the limiting support cylinder 320 is larger than the diameter of the hollow liquid storage tube 330, the transmission piston rod 310 can be moved slightly by the large displacement of the second adjustable sealing plug 334, which makes it convenient for users to make high-precision fine adjustments.

[0038] In addition, when the extrusion head is over-adjusted, causing it to be subjected to excessive pressure against the coating roller, the hydraulic pressure in the limiting pressure cylinder 313 becomes too high. At this time, the first adjustable sealing plug 311 moves towards the sound relief pipe 318 under the drive of the transmission fluid 332 to relieve pressure, thereby ensuring that no large force is generated between the extrusion head and the coating roller. Furthermore, the movement of the first adjustable sealing plug 311 allows gas to pass through the sound relief pipe 318 to produce a warning sound, thereby alerting the operator to stop the current improper operation as soon as possible.

[0039] Thus, through the cooperation of multiple structures, users can make high-precision fine adjustments to the position of the extrusion head through the adjustment device, making the adjustment accuracy of the device higher and issuing warnings during the adjustment process. Secondly, the invention can be applied to different models of extrusion heads, making the application range of the adjustment device wider. In addition, the invention has buffer protection and warning functions, which can effectively avoid over-adjustment of the extrusion head, making the function of the adjustment device more comprehensive. Furthermore, the invention has a simple structure and is easy to use, making it worthy of promotion and use.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0041] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An adjustment device for the gap between an extrusion head and a coating roller, comprising a second supporting metal plate, characterized in that: A distance adjustment mechanism is provided above the second supporting metal plate. Several first supporting metal plates are provided at both ends of the upper surface of the second supporting metal plate to support and fix the distance adjustment mechanism. The distance adjustment mechanism includes a distance adjustment component for adjusting the position of the extrusion head, a power output component for supporting and driving the distance adjustment component, and an adjustable fixing component that cooperates with the power output component to fix and adjust the position of the distance adjustment component. The distance adjustment component is sleeved on the power output component, and the adjustable fixing component is located on both sides of the distance adjustment component. The power output assembly includes a hollow liquid storage tube filled with transmission fluid for transmission. Several pressure relief holes are located in the middle of the hollow liquid storage tube. Fourth bearing metal plates are fixedly connected to both ends of the hollow liquid storage tube. A retractable driving component corresponding to the hollow liquid storage tube is located at the bottom of the fourth bearing metal plate. A second adjustable sealing plug, which is slidably connected to the retractable driving component, is fixedly connected to the retractable end of the retractable driving component. The distance adjustment assembly includes a limiting pressure-dividing cylinder with several limiting... A positioning support cylinder is installed through the side wall of a positioning pressure-dividing cylinder, and is fixedly connected to the positioning pressure-dividing cylinder. A transmission piston rod is slidably connected to the bottom of the positioning support cylinder. An adjustable metal plate is installed at the end of the transmission piston rod away from the positioning pressure-dividing cylinder. The diameter of the positioning support cylinder is larger than the diameter of the hollow liquid storage tube, so that when the second adjustable sealing plug makes a large displacement, the transmission piston rod moves accordingly with a small amplitude. A positioning pressure relief cylinder is installed at the end of the positioning pressure-dividing cylinder away from the second bearing metal plate, and a sound-relieving pressure relief pipe is installed at the end of the positioning pressure-dividing cylinder away from the positioning pressure-dividing cylinder. The pressure relief tube is installed through the side wall of the pressure relief cylinder. The sound relief tube is fixedly connected to the pressure relief cylinder. The pressure relief cylinder has a first adjustable sealing plug that is slidably connected inside. The pressure relief cylinder has a retractable limiting component inside for driving the first adjustable sealing plug to move away from the sound relief tube. The adjustable fixing component includes an adjustable fixing tube that is fixedly connected to the pressure relief cylinder and slidably connected to the hollow liquid storage tube. The end of the adjustable fixing tube away from the pressure relief cylinder is fixedly connected to the pressure relief cylinder. The pressure relief cylinder has several transmission screws threaded on it.

2. The device for adjusting the gap between the extrusion head and the coating roller according to claim 1, characterized in that: Both ends of the hollow liquid storage tube are provided with annular seals corresponding to the retractable drive component. The annular seals are fixedly connected to the retractable drive component. Several sound-emitting gas pipes for gas delivery and warning functions are provided on the annular seals, and the sound-emitting gas pipes pass through the annular seals.

3. The device for adjusting the gap between the extrusion head and the coating roller according to claim 2, characterized in that: A third bearing metal plate is provided on the side of the limiting support cylinder away from the limiting pressure dividing cylinder. The extrusion head is fixed to the third bearing metal plate by bolts. A limiting metal track that is slidably connected to the side of the third bearing metal plate facing the transmission piston rod is fixedly connected to the side of the adjustable metal plate. Several fastening screws corresponding to the limiting metal track are threadedly connected to the adjustable metal plate.

4. The device for adjusting the gap between the extrusion head and the coating roller according to claim 3, characterized in that: The retractable limiting component is a spring or a metal sheet. One end of the retractable limiting component is fixedly connected to the first adjustable sealing plug, and the other end of the retractable limiting component is fixedly connected to the limiting pressure relief cylinder.

5. The device for adjusting the gap between the extrusion head and the coating roller according to claim 4, characterized in that: The limiting and fixing cylinder is provided with a deformable installation tube inside. The deformable installation tube is rotatably connected to the limiting and fixing cylinder. An elastic reinforcing tube corresponding to the hollow liquid storage tube is fixedly connected inside the deformable installation tube. The elastic reinforcing tube is fixedly connected to the deformable installation tube.

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