A polyurethane coating device for a medical polymer splint base cloth

Abstract

The present invention relates to the technical field related to the production of medical polymer splints, and specifically to a polyurethane coating device for a base cloth of a medical polymer splint, which includes a frame, a coating roller rotatably installed on the frame, and a plurality of guide rollers; a hot-melt feeding member is arranged at a position above the coating roller, and a scraper mechanism is arranged at a position on the side end of the coating roller; the scraper mechanism includes a movable member and an adjusting member, the adjusting member is installed on the frame and connected to the movable member, a buffer chamber and a reflux chamber are formed inside the movable member, the buffer chamber is communicated with the inside of the hot-melt feeding member through a communicating pipe, and an extrusion channel is formed on the side of the buffer chamber facing the coating roller; a scraper is further arranged on the side of the movable member facing the coating roller, and the reflux chamber is communicated with a groove formed on one side of the scraper through a reflux channel, which can effectively prevent the phenomenon that the excess molten polyurethane glue accumulates in the groove and causes the molten polyurethane glue to overflow, and at the same time improves the uniformity of the coating of the molten polyurethane glue.

Description

Technical Field

[0001] The invention relates to the technical field related to the production of medical polymer splints, in particular to a polyurethane coating device for a base cloth of a medical polymer splint. Background Art

[0002] Since medical polymer splints are used in the field of medical technology, the production process of medical polymer splints is very rigorous, and hot-melt polyurethane glue needs to be coated on the base fabric of the medical polymer splints.

[0003] China's authorized patent for medical polymer splint base fabric coating device (Announcement No.: CN205183066U) discloses a nozzle and a roller, the roller is a hollow structure, the nozzle is installed on one side of the roller, the nozzle of the nozzle is horizontally distributed, and a trowel is installed on the other side of the roller; it also includes a cantilever bracket, one end of the cantilever bracket is installed on the support frame, and the other end is installed with a spring seat, the spring seat is installed on the cantilever bracket through a length adjustment screw, one end of the trowel is hinged on the cantilever bracket, and the other end is connected to the spring, and the other end of the spring is installed on the spring seat; one end of the roller has a cooling water inlet and the other end has a cooling water outlet. The medical polymer splint base fabric coating device provided by the utility model, the base fabric enters from one side of the nozzle, and the hot melt polyurethane glue is sprayed when passing through the nozzle, and then wrapped on the surface of the roller for pre-cooling by the cooling water in the inner cavity of the roller, and then the polyurethane glue on the surface is smoothed by the trowel, which can effectively reduce the loss of polyurethane glue dripping and improve work efficiency.

[0004] However, although the scraper structure it adopts can realize the function of leveling the polyurethane, the coating is achieved by spraying, which easily leads to uneven distribution of polyurethane on the base fabric, and it is easy for some positions of the base fabric to not be sprayed with polyurethane or the amount of sprayed polyurethane is relatively small, resulting in poor quality of the final product. Summary of the invention

[0005] The object of the present invention is to provide a polyurethane coating device for a medical polymer splint base cloth to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A polyurethane coating device for medical polymer splint base fabric, comprising a frame, a coating roller and a plurality of guide rollers rotatably mounted on the frame, the base fabric to be coated bypasses the coating roller and the plurality of guide rollers to penetrate the frame;

[0008] A hot melt feeding member for extruding molten polyurethane adhesive is arranged above the coating roller, and a scraper mechanism is arranged at the side end of the coating roller;

[0009] The scraper mechanism includes a movable part and an adjusting part, the adjusting part is mounted on the frame and connected to the movable part, a buffer chamber and a reflux chamber are formed on the inner side of the movable part, the buffer chamber is connected to the inner side of the hot melt feeding part through a connecting pipe, and an extrusion channel is formed on the side of the buffer chamber facing the coating roller;

[0010] A scraper is also provided on the side of the movable part facing the coating roller, and the reflux chamber is connected to the side of the scraper through a reflux channel to form a groove.

[0011] The above-mentioned polyurethane coating device for medical polymer splint base fabric: the hot melt feeding member is connected to two thickness adjusting members installed on the frame, and the thickness adjusting members include:

[0012] A fixed frame mounted on the frame and a first sliding block slidably connected to the fixed frame, wherein the first sliding block is fixed to the hot-melt feeding member;

[0013] It also includes a telescopic driving member installed on the fixing frame, and the movable end of the telescopic driving member is connected to the first sliding block.

[0014] The above-mentioned polyurethane coating device for medical polymer splint base fabric: the regulating member comprises:

[0015] A support frame fixed to the frame, wherein a threaded hole is formed on the support frame;

[0016] A threaded rod passes through the threaded hole and is threadedly connected thereto, and the threaded rod is rotatably connected to the movable part.

[0017] The polyurethane coating device for medical polymer splint base fabric as described above: the frame is also provided with a pulling mechanism, and the pulling mechanism is used to automatically smooth the transported base fabric.

[0018] The above-mentioned polyurethane coating device for medical polymer splint base fabric: the pulling mechanism comprises:

[0019] A sliding support plate and a first conveying roller and a second conveying roller rotatably mounted on the sliding support plate, wherein the first conveying roller and the second conveying roller are located at upper and lower sides of the base cloth;

[0020] A driving member, mounted on the sliding support plate, for driving the first conveying roller to rotate;

[0021] Two symmetrically arranged smoothing rollers are arranged at two ends of the first conveying roller, and the axial direction of the smoothing roller and the axial direction of the first conveying roller can be changed.

[0022] The above-mentioned polyurethane coating device for medical polymer splint base fabric: the first conveying roller is rotatably mounted on the first support shaft, the two ends of the first support shaft are hinged with second support shafts, and the smoothing roller is rotatably mounted on the second support shaft;

[0023] One end of the second support shaft away from the first support shaft is inserted into a support sleeve, and the support sleeve is hinged to the frame.

[0024] As described above, the polyurethane coating device for medical polymer splint base fabric: a second bevel gear is fixed to one end of the first conveying roller relative to the smoothing roller, and a first bevel gear is fixed to one end of the smoothing roller facing the first conveying roller, and when the placement angle between the smoothing roller and the first conveying roller changes, the first bevel gear can mesh with the second bevel gear.

[0025] The above-mentioned polyurethane coating device for medical polymer splint base fabric: the driving member comprises:

[0026] A motor mounted on the sliding support plate, wherein a first pulley is fixed on an output shaft of the motor;

[0027] An annular inner groove is formed on the first conveying roller, and a second pulley is fixed in the annular inner groove;

[0028] The first pulley and the second pulley are rotatably connected via a transmission belt.

[0029] The polyurethane coating device for medical polymer splint base fabric as described above: the pulling mechanism also includes at least two second cylinders, the fixed ends of the second cylinders are rotatably connected to the frame, and the movable ends of the second cylinders are rotatably connected to the sliding support plate.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. The scraper is used to scrape off the excess molten polyurethane glue on the base cloth. The scraped molten polyurethane glue enters the tank body and enters the reflux cavity along the reflux channel. Then, the drainage structure can be used to discharge the molten polyurethane glue in the reflux cavity. Of course, in order to prevent the molten polyurethane glue from solidifying or hardening in the reflux cavity, a heating unit can be provided in the reflux cavity. The heating unit includes but is not limited to a heating rod, etc., so as to effectively prevent the excess molten polyurethane glue from accumulating in the tank body and causing the molten polyurethane glue to overflow.

[0032] 2. The buffer cavity is used to receive part of the molten polyurethane glue extruded by the hot melt feeding member, and then the molten polyurethane glue flows into the base fabric through the extrusion channel, so as to supplement the molten polyurethane glue on the base fabric, so as to eliminate the problem of partial loss of the molten polyurethane glue on the base fabric when applying a thin layer of molten polyurethane glue, thereby effectively improving the uniformity of the molten polyurethane glue coating;

[0033] 3. The driving member is arranged to drive the first conveying roller to rotate when working. Since the base cloth is pressed between the first conveying roller and the second conveying roller, the first conveying roller cooperates with the second conveying roller to drive the base cloth to be conveyed when rotating, and the second conveying roller also rotates accordingly. When the axis of the smoothing roller is in line with the axis of the first conveying roller, the smoothing roller is in a free rotation state, so it will not interfere with the movement of the base cloth. When the axial direction of the smoothing roller changes with the axial direction of the first conveying roller, the smoothing roller tilts toward the conveying direction of the base cloth, so that the smoothing roller generates force toward both sides of the base cloth body on the base cloth, thereby realizing the smoothing action on the base cloth. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the structure of a polyurethane coating device for a medical polymer splint base fabric.

[0035] Figure 2 This is a schematic structural diagram of the polyurethane coating device for medical polymer splint base fabric from another angle.

[0036] Figure 3 This is a schematic diagram of the movement direction of the base fabric in the polyurethane coating device for the medical polymer splint base fabric.

[0037] Figure 4 It is a top view of the scraper mechanism and hot melt feeding parts in the polyurethane coating device for medical polymer splint base fabric.

[0038] Figure 5 for Figure 4 Cross-section view along the AA direction.

[0039] Figure 6 This is a schematic diagram of the structure of the pulling mechanism in the polyurethane coating device for the medical polymer splint base fabric.

[0040] Figure 7 It is a schematic diagram of the placement status of the first conveying roller and the second conveying roller in the polyurethane coating device for medical polymer splint base cloth.

[0041] Figure 8 It is a schematic diagram of the placement state of the first conveying roller and the second conveying roller at another angle in the polyurethane coating device for medical polymer splint base cloth.

[0042] Fig. 9It is a top view of the polyurethane coating device for medical polymer splint base fabric when the axes of the first conveying roller and the smoothing roller are collinear.

[0043] Fig.10 It is a top view of the first conveying roller and the smoothing roller in the polyurethane coating device for medical polymer splint base fabric when the axes are tilted.

[0044] In the figure:

[0045] 1- rack;

[0046] 2-thickness adjusting member, 201-first cylinder, 202-fixed frame, 203-first sliding block;

[0047] 3-hot melt feeding piece, 301-connecting pipe;

[0048] 4-scraper mechanism, 401-scraper, 402-buffer chamber, 403-extrusion channel, 404-reflux chamber, 405-reflux channel, 406-support frame, 407-threaded rod, 408-movable part;

[0049] 5- coating roller;

[0050] 6- pulling mechanism, 601- sliding support plate, 602- second cylinder, 603- motor, 604- transmission belt, 605- second sliding block, 606- first conveying roller, 6061- annular embedded groove, 607- smoothing roller, 608- first bevel gear, 609- second bevel gear, 610- second conveying roller, 611- first support shaft, 612- second support shaft, 613- support sleeve;

[0051] 7-guide roller;

[0052] 8- Base fabric. DETAILED DESCRIPTION

[0053] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0054] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0055] In addition, in order to better illustrate the present application, numerous specific details are provided in the specific embodiments below. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, and elements well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0056] Polymer gypsum plywood, also known as "polymer plywood", is composed of multiple layers of polymer fibers impregnated with polyurethane and polyester. It has the characteristics of fast hardening, high strength, and water resistance. The present invention aims to propose a device for polyurethane coating, and the specific implementation method is as follows:

[0057] See also Figure 1-Figure 5 In an embodiment of the present invention, a polyurethane coating device for a medical polymer splint base fabric comprises a frame 1, a coating roller 5 and a plurality of guide rollers 7 rotatably mounted on the frame 1, a base fabric 8 to be coated bypasses the coating roller 5 and the plurality of guide rollers 7 to penetrate the frame 1, a hot melt feeder 3 for extruding molten polyurethane glue is provided at a position above the coating roller 5, and a scraper mechanism 4 is provided at a position at a side end of the coating roller 5, the base fabric 8 to be coated is pulled and transported from one side of the frame 1 to the coating roller 5, bypasses the coating roller 5 and is led out through the guide roller 7, when the base fabric 8 moves to the top of the coating roller 5, the molten polyurethane glue extruded from the hot melt feeder 3 adheres to the base fabric 8, and then the molten polyurethane glue is smoothed by the scraper mechanism 4, and the excess molten polyurethane glue is scraped off to achieve coating.

[0058] It should be noted that a cooling unit is provided at a position between the base fabric 8 after leaving the coating roller 5 and the next guide roller 7. The cooling unit is used to cool the molten polyurethane glue so that the molten polyurethane glue solidifies and eliminates the problem of adhesion between the molten polyurethane glue and the guide roller 7.

[0059] Specifically, see Figure 3-Figure 5 The scraper mechanism 4 includes a movable part 408 and an adjusting part, the adjusting part is installed on the frame 1 and connected to the movable part 408, a buffer chamber 402 and a reflux chamber 404 are formed on the inner side of the movable part 408, the buffer chamber 402 is connected with the inner side of the hot melt feeding part 3 through a connecting pipe 301, and an extrusion channel 403 is formed on the side of the buffer chamber 402 facing the coating roller 5; a scraper 401 is also provided on the side of the movable part 408 facing the coating roller 5, and the reflux chamber 404 forms a groove with one side of the scraper 401 and is connected through a reflux channel 405.

[0060] The length direction of the movable part 408 is parallel to the axial direction of the coating roller 5. When the base cloth 8 with the molten polyurethane glue attached moves to the position of the scraper 401, the scraper 401 scrapes off the excess molten polyurethane glue on the base cloth 8. The scraped molten polyurethane glue enters the tank body and enters the reflux chamber 404 along the reflux channel 405. Then, the drainage structure can be used to discharge the molten polyurethane glue in the reflux chamber 404. Of course, in order to prevent the molten polyurethane glue from solidifying or hardening in the reflux chamber 404, a heating unit can be set in the reflux chamber 404. The heating unit includes but is not limited to a heating rod, etc., so as to effectively prevent the excess molten polyurethane glue from accumulating in the tank body and causing the molten polyurethane glue to overflow.

[0061] It should be noted that the buffer chamber 402 is used to receive part of the molten polyurethane glue extruded by the hot-melt feeder 3, and then the molten polyurethane glue flows into the base fabric 8 through the extrusion channel 403, so as to supplement the molten polyurethane glue on the base fabric 8, so as to eliminate the problem of partial loss of the molten polyurethane glue on the base fabric 8 when applying a thinner layer of molten polyurethane glue, thereby effectively improving the uniformity of the coating of the molten polyurethane glue.

[0062] Furthermore, the adjusting member includes a supporting frame 406 fixed to the frame 1, a threaded hole is formed on the supporting frame 406, and also includes a threaded rod 407 that passes through the threaded hole and is threadedly connected thereto, the threaded rod 407 is rotatably connected to the movable member 408, and a handwheel is fixed to the end of the threaded rod 407 away from the movable member 408, and the threaded rod 407 is driven to rotate by rotating the handwheel. When the threaded rod 407 rotates, the placement position of the movable member 408 is adjusted through the threaded connection between the supporting frame 406 and the threaded rod 407, thereby changing the distance between the scraper 401 and the base cloth 8, and realizing the application of polyurethane glue of different thicknesses.

[0063] At the same time, in order to achieve different thickness of polyurethane adhesive coating, please refer to Figure 2 The hot melt feeding member 3 is connected to the two thickness adjusting members 2 installed on the frame 1, and the thickness adjusting member 2 includes a fixed frame 202 installed on the frame 1 and a first sliding block 203 slidably connected to the fixed frame 202, and the first sliding block 203 is fixed to the hot melt feeding member 3; it also includes a telescopic driving member installed on the fixed frame 202, and the movable end of the telescopic driving member is connected to the first sliding block 203.

[0064] The first sliding block 203 is driven by the telescopic driving member to adjust in the vertical direction, thereby driving the height adjustment of the hot melt feeding member 3, and then changing the distance between the discharge port of the hot melt feeding member 3 and the coating roller 5. The telescopic driving member includes but is not limited to the first cylinder 201, the hydraulic cylinder and the electric telescopic rod.

[0065] As another embodiment of the present invention, in order to eliminate the wrinkles of the base cloth 8 during the conveying process to a certain extent, a pulling mechanism 6 is further provided on the frame 1, and the pulling mechanism 6 is used to automatically smooth the conveyed base cloth 8.

[0066] See also Figure 6-Figure 10 , the pulling mechanism 6 comprises:

[0067] A sliding support plate 601 and a first conveying roller 606 and a second conveying roller 610 rotatably mounted on the sliding support plate 601, wherein the first conveying roller 606 and the second conveying roller 610 are located at the upper and lower sides of the base fabric 8, wherein the sliding support plate 601 is arranged in an inverted U-shaped structure, and a second sliding block 605 is fixed at both ends thereof, and the second sliding block 605 is slidably mounted in a strip-shaped slide groove formed on the frame 1;

[0068] A driving member, mounted on the sliding support plate 601, for driving the first conveying roller 606 to rotate;

[0069] Two symmetrically arranged smoothing rollers 607 are arranged at both ends of the first conveying roller 606 , and the axial direction of the smoothing roller 607 and the axial direction of the first conveying roller 606 can be changed.

[0070] When the driving member is set, it drives the first conveying roller 606 to rotate. Since the base cloth 8 is pressed between the first conveying roller 606 and the second conveying roller 610, the first conveying roller 606 rotates to cooperate with the second conveying roller 610 to drive the base cloth 8 for conveyance, and the second conveying roller 610 also rotates. When the axis of the smoothing roller 607 is colinear with the axis of the first conveying roller 606, the smoothing roller 607 is in a free rotation state, so it will not interfere with the movement of the base cloth 8. When the axial direction of the smoothing roller 607 changes with the axial direction of the first conveying roller 606, the smoothing roller 607 tilts toward the conveying direction of the base cloth 8, so that the smoothing roller 607 generates a force on the base cloth 8 toward the two sides of the base cloth 8 body, thereby realizing the smoothing action on the base cloth 8.

[0071] Specifically, the first conveying roller 606 is rotatably mounted on the first support shaft 611, and the second support shaft 612 is hinged at both ends of the first support shaft 611. The smoothing roller 607 is rotatably mounted on the second support shaft 612, and the end of the second support shaft 612 away from the first support shaft 611 is inserted into the support sleeve 613, and the support sleeve 613 is hinged to the frame 1.

[0072] Among them, it should be noted that the rotation direction of the second support shaft 612 and the support sleeve 613 relative to the first support shaft 611 is parallel to the moving direction of the base cloth 8, and the second support shaft 612 is inserted into the support sleeve 613. When the second support shaft 612 rotates relative to the first support shaft 611, the distance between the end of the second support shaft 612 away from the first support shaft 611 and the side wall of the frame 1 becomes larger, so it will move axially relative to the support sleeve 613, thereby ensuring the effective support of the second support shaft 612 for the smoothing roller 607.

[0073] Furthermore, a second bevel gear 609 is fixed to one end of the first conveying roller 606 relative to the smoothing roller 607, and a first bevel gear 608 is fixed to one end of the smoothing roller 607 facing the first conveying roller 606. When the placement angle of the smoothing roller 607 and the first conveying roller 606 changes, the first bevel gear 608 can mesh with the second bevel gear 609. When the sliding support plate 601 moves toward the conveying direction of the base fabric 8, the driving member, the first conveying roller 606 and the second conveying roller 610 are synchronously driven to move in the same direction. However, due to the limitation of the support sleeve 613, the second support shaft 610 is 12 deflects relative to the first support shaft 611, and the smoothing roller 607 deflects synchronously. When the sliding support plate 601 moves to the end of the stroke (the two ends of the strip slide are the two stroke ends of the sliding support plate 601, and the stroke end mentioned here is the end of the strip slide facing the moving direction of the base cloth 8), the smoothing roller 607 and the second support shaft 612 rotate to the maximum angle. At this time, the first bevel gear 608 is meshed with the second bevel gear 609, and then when the first conveying roller 606 rotates, the smoothing roller 607 is driven to rotate actively, so as to generate a component force towards both sides of the base cloth 8, so as to achieve the effect of smoothing the base cloth 8.

[0074] Exemplarily, in a specific embodiment, the driving member described above includes a motor 603 installed on the sliding support plate 601, and a first pulley is fixed on the output shaft of the motor 603; it also includes an annular embedded groove 6061 formed on the first conveying roller 606, and a second pulley is fixed in the annular embedded groove 6061. The first pulley and the second pulley are rotatably connected by a transmission belt 604. When the motor 603 is working, the first conveying roller 606 is driven to rotate by the action of the transmission belt 604, thereby realizing the driving requirement.

[0075] Furthermore, the pulling mechanism 6 also includes at least two second cylinders 602, the fixed ends of the second cylinders 602 are rotatably connected to the frame 1, and the movable ends of the second cylinders 602 are rotatably connected to the sliding support plate 601. The sliding support plate 601 is driven to move when the second cylinders 602 are telescopically moved. Of course, the second cylinders 602 in this embodiment can also be replaced by an electric telescopic rod or a hydraulic rod, and this embodiment does not make any specific limitations on this.

[0076] It will be apparent to those skilled in the art that the 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 the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0077] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A polyurethane coating device for medical polymer splint base fabric, characterized in that: It includes a frame, a coating roller and a plurality of guide rollers rotatably mounted on the frame, and the base fabric to be coated passes around the coating roller and the plurality of guide rollers to penetrate the frame; A hot melt feeder for extruding molten polyurethane glue is arranged above the coating roller, and a scraper mechanism is arranged at the side end of the coating roller; the scraper mechanism includes a movable part and an adjusting part, the adjusting part is installed on the frame and connected to the movable part, a buffer chamber and a reflux chamber are formed on the inner side of the movable part, the buffer chamber is connected to the inner side of the hot melt feeder through a connecting pipe, and an extrusion channel is formed on the side of the buffer chamber facing the coating roller; a scraper is also arranged on the side of the movable part facing the coating roller, and a groove body formed by the reflux chamber and the scraper side is connected through the reflux channel; The frame is also provided with a pulling mechanism, which is used for automatically smoothing the conveyed base fabric; the pulling mechanism comprises: a sliding support plate and a first conveying roller and a second conveying roller rotatably mounted on the sliding support plate, the first conveying roller and the second conveying roller being located at the upper and lower sides of the base fabric; a driving member, which is mounted on the sliding support plate and is used for driving the first conveying roller to rotate; two symmetrically arranged smoothing rollers, which are arranged at both ends of the first conveying roller, and the axial direction of the smoothing roller and the axial direction of the first conveying roller can be changed; the first conveying roller is rotatably mounted on the first support shaft, the two ends of the first support shaft are hinged with the second support shaft, and the smoothing roller is rotatably mounted on the second support shaft; the second support shaft The end away from the first support shaft is inserted into the support sleeve, and the support sleeve is hinged to the frame; a second bevel gear is fixed to the end of the first conveying roller opposite to the smoothing roller, and a first bevel gear is fixed to the end of the smoothing roller facing the first conveying roller, and when the placement angle of the smoothing roller and the first conveying roller changes, the first bevel gear can engage with the second bevel gear; the hot melt feeding piece is connected to two thickness adjustment pieces installed on the frame, and the thickness adjustment piece includes: a fixed frame installed on the frame and a first sliding block slidably connected to the fixed frame, and the first sliding block is fixed to the hot melt feeding piece; it also includes a telescopic driving piece installed on the fixed frame, and the movable end of the telescopic driving piece is connected to the first sliding block.

2. A polyurethane coating device for medical polymer splint base fabric according to claim 1, characterized in that: Adjustment parts include: A support frame fixed to the frame, with threaded holes formed on the support frame; A threaded rod passes through the threaded hole and is threadedly connected thereto, and the threaded rod is rotationally connected to the movable part.

3. A polyurethane coating device for medical polymer splint base fabric according to claim 2, characterized in that: The drive components include: A motor is mounted on the sliding support plate, and a first pulley is fixed on the output shaft of the motor; An annular inner groove is formed on the first conveying roller, and a second pulley is fixed in the annular inner groove.

4. A polyurethane coating device for medical polymer splint base fabric according to claim 3, characterized in that: The first pulley and the second pulley are rotatably connected via a transmission belt.

5. A polyurethane coating device for medical polymer splint base fabric according to claim 4, characterized in that: The pulling mechanism also includes at least two second cylinders, the fixed ends of the second cylinders are rotatably connected to the frame, and the movable ends of the second cylinders are rotatably connected to the sliding support plate.

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