Non-woven fabric film covering device with positioning function

Abstract

The utility model relates to the technical field of non-woven fabric processing, in particular to a non-woven fabric laminating device with a positioning function, which comprises a processing table, one end of the processing table is rotatably connected with a fabric unwinding frame and a protective film unwinding frame respectively, and the other end of the processing table is rotatably connected with a winding frame. First conveying rollers are rotationally connected between the cloth unwinding frame and the processing table, a first tensioning roller is rotationally connected between the first conveying rollers, and a spraying frame is connected to the surface of the processing table through bolts. According to the improved film laminating device, the limiting pieces sleeving the outer walls of the first conveying roller and the second conveying roller are matched with the scales on the surfaces of the roller bodies, the edges can be accurately positioned according to material specifications, material deviation is effectively avoided, and it is ensured that the positions of materials are accurate in the whole process from unwinding to winding; the cloth unwinding frame, the protective film unwinding frame and the winding frame are connected with the driving disc and the driven disc conveniently through the sleeving shaft, no complex tool is needed, the downtime is greatly shortened, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of nonwoven fabric processing technology, specifically to a nonwoven fabric coating device with positioning function. Background Technology

[0002] Nonwoven fabric, also known as non-woven cloth, is a type of fabric that does not require spinning or weaving. It is made by directly using polymer chips, short fibers, or filaments to form a web through airflow or mechanical means, and then reinforcing it through methods such as hydroentangling, needle punching, thermal rolling, chemical bonding, thermal bonding, or stitch weaving.

[0003] Since the strength and abrasion resistance of non-woven fabrics may be limited in some applications, it is necessary to form a protective film on the surface of the non-woven fabric through lamination to effectively isolate external factors from damaging the non-woven fabric and extend its service life. The laminating machine mainly uses mechanical transmission, heating, and pressure to tightly adhere the film to the surface of the material to be covered.

[0004] In the process of realizing this utility model, the inventors discovered the following problems with the existing technology: 1. However, most current laminating equipment lacks a limiting structure at both ends of the rollers during unwinding and rewinding in order to facilitate material loading and unloading. Consequently, it is impossible to accurately position the ends of the processed products, making it difficult to ensure that there will be no displacement during the conveying process; 2. Furthermore, in most current processing methods, the film comes into contact with the fabric under heating and pressure. However, due to the short time, the hot melt adhesive or softened film material of the film does not have enough time to fully wet the surface of the fabric, resulting in weak adhesion. Utility Model Content

[0005] The purpose of this invention is to provide a nonwoven fabric coating device with positioning function, so as to solve the problems mentioned in the background art, which are that the roller body lacks a limiting structure at both ends, resulting in material deviation during processing, and that the hot melt adhesive or softened film material of the film body does not have enough time to fully wet the fabric surface due to the short time, resulting in weak adhesion. To achieve the above objectives, this utility model provides the following technical solution: a nonwoven fabric coating device with positioning function, comprising a processing table, one end of which is rotatably connected to a fabric unwinding frame and a protective film unwinding frame, and the other end of which is rotatably connected to a take-up frame. A first conveying roller is rotatably connected between the fabric unwinding frame and the processing table, and a first tensioning roller is rotatably connected between the first conveying rollers. A spraying frame is bolted to the surface of the processing table, and a second conveying roller is rotatably connected to both ends of the spraying frame. A second tensioning roller and a third tensioning roller are rotatably connected to the surface of the processing table, and the second and third tensioning rollers are respectively located on one side of the corresponding second conveying roller, with the second tensioning roller located directly above the first tensioning roller. Limiting components are sleeved on the outer walls of the first and second conveying rollers. An upper extrusion roller and a lower extrusion roller are rotatably connected between the third tensioning roller and the take-up frame. A screw is threadedly connected to the surface of the processing table through an L-shaped upright, and a pressure plate is rotatably connected to the bottom shaft of the screw.

[0006] The protective film unwinding frame consists of an active plate and a driven plate. The active plate and the driven plate are rotatably connected to the inner wall of opposite sides of the frame. The active plate and the driven plate are connected by a sleeve shaft through a quick-release bolt threaded connection.

[0007] The spraying frame is internally rotatably connected to a reciprocating screw, and a moving platform is slidably connected to the surface of the spraying frame. The bottom of the moving platform extends into the interior of the spraying frame and is sleeved on the outer wall of the reciprocating screw. A storage tank and a high-pressure nozzle are fixedly connected to the top of the moving platform, and the high-pressure nozzle and the storage tank are connected by a pipe.

[0008] More preferably, the first conveying rollers and the second conveying rollers are connected by a sprocket assembly, and the sprocket assembly rotates on one side of the outer wall of the frame of the first and second conveying rollers. The sprocket assembly consists of two sets of sprockets and chains meshing on the outside of the sprockets. At the same time, the sprockets are fixedly connected to the shaft heads of their corresponding first and second conveying rollers. The moving platform reciprocates between the second conveying rollers, and a vision module is fixedly connected between the storage tank and the high-pressure nozzle.

[0009] More preferably, the height of the first conveying roller is higher than that of the fabric unwinding frame and the first tensioning roller, and the fabric unwinding frame, the first conveying roller and the first tensioning roller constitute a first conveying system, and the height of the second conveying roller and the second tensioning roller is higher than that of the spraying frame, and the protective film unwinding frame, the second conveying roller and the second tensioning roller constitute a second conveying system.

[0010] More preferably, cylinders are fixedly connected to the surfaces of the first tensioning roller, the second tensioning roller, the third tensioning roller, and the upper extrusion roller, and the cylinders on the surfaces of the second tensioning roller, the third tensioning roller, and the upper extrusion roller are distributed in the same direction, with the power output end pointing from top to bottom, and the first tensioning roller and the second tensioning roller move relative to each other via the cylinders.

[0011] More preferably, the pressure plate is located between the second tensioning roller and the spraying frame and between the second conveying roller and the third tensioning roller. The outer walls of the second conveying roller and the first conveying roller are fitted with a structure that is consistent with the structure of the limiting member, but with an inner diameter consistent with the diameter of the second conveying roller and the first conveying roller. The limiting member is composed of two semi-circular metal parts connected at one end by a hinge and at the other end by a quick-release bolt threaded connection. At the same time, the inner walls of the two semi-circles are covered with a rubber layer.

[0012] More preferably, the shafts of the third tension roller, the upper extrusion roller, and the lower extrusion roller are hollow, and the heating modules are distributed in a ring inside the hollow cavity. Furthermore, servo motors are provided on one side of the outer wall of the upper extrusion roller and the lower extrusion roller, and relative motion is achieved through the servo motors.

[0013] More preferably, the fabric unwinding frame and the rewinding frame have the same internal structure as the protective film unwinding frame, and the surfaces of the driving disc and the driven disc are both provided with slots for inserting and connecting the sleeve shaft, and the outer walls of the sleeve shaft, the first conveying roller and the second conveying roller are all engraved with scales.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] In this invention, the limiting components sleeved on the outer walls of the first and second conveying rollers cooperate with the scale on the roller surface to accurately position the edges according to the material specifications, effectively preventing material deviation and ensuring accurate material positioning throughout the entire process from unwinding to rewinding. At the overlap point, the third tensioning roller, combined with a cylinder, precisely controls the pressure to initially bond the fabric and film. Subsequently, the upper and lower extrusion rollers, using a heating module and working in conjunction with the external control unit, further ensure tight bonding, reduce defects such as bubbles and wrinkles, and greatly improve the accuracy and quality stability of the coating.

[0016] In this invention, the fabric unwinding frame, protective film unwinding frame, and winding frame utilize a convenient connection method between the sleeve shaft and the driving and driven discs, eliminating the need for complex tools, significantly reducing downtime, and improving production efficiency. Adjusting the pressure plate with a screw and controlling the height of the tension roller with a cylinder reduces the skill requirements for operators, facilitating personnel training and daily maintenance. Furthermore, after initial manual operation, automated conveying and winding can be achieved. The coordinated operation of all components ensures a highly efficient and smooth production process, further enhancing production efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the distribution structure of the first conveying roller of this utility model;

[0019] Figure 3 This is a schematic diagram of the distribution structure of the second conveying roller of this utility model;

[0020] Figure 4 This is a schematic diagram of the winding rack structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the internal structure of the spray painting frame of this utility model;

[0022] Figure 6 This is a schematic diagram of the protective film unwinding frame structure of this utility model.

[0023] In the diagram: 1. Processing table; 2. Fabric unwinding frame; 3. Protective film unwinding frame; 301. Driven disc; 302. Driven disc; 303. Connecting shaft; 4. Rewinding frame; 5. First conveying roller; 6. First tensioning roller; 7. Spraying frame; 701. Reciprocating screw; 702. Moving platform; 703. Storage box; 704. High-pressure nozzle; 8. Second conveying roller; 9. Second tensioning roller; 10. Third tensioning roller; 11. Limiting component; 12. Upper extrusion roller; 13. Lower extrusion roller; 14. Screw; 15. Pressure plate; 16. Sprocket assembly; 17. Cylinder. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1 to 6This utility model provides a technical solution: a non-woven fabric coating device with positioning function, including a processing table 1. One end of the processing table 1 is rotatably connected to a fabric unwinding frame 2 and a protective film unwinding frame 3, respectively. The other end of the processing table 1 is rotatably connected to a winding frame 4. A first conveying roller 5 is rotatably connected between the fabric unwinding frame 2 and the processing table 1. A first tensioning roller 6 is rotatably connected between the first conveying rollers 5. A spraying frame 7 is bolted to the surface of the processing table 1. Both ends of the spraying frame 7 are rotatably connected to second conveying rollers 8. The surface of the processing table 1 is rotatably connected to a second conveying roller 8. A second tension roller 9 and a third tension roller 10 are connected. The second tension roller 9 and the third tension roller 10 are located on one side of the corresponding second conveyor roller 8, and the second tension roller 9 is located directly above the first tension roller 6. Limiting parts 11 are sleeved on the outer walls of the first conveyor roller 5 and the second conveyor roller 8. The third tension roller 10 is rotatably connected to the winding frame 4 by an upper extrusion roller 12 and a lower extrusion roller 13. The surface of the processing table 1 is penetrated by an L-shaped upright and threaded with a screw 14. A pressure plate 15 is rotatably connected to the bottom shaft of the screw 14.

[0026] The protective film unwinding frame 3 consists of an active plate 301 and a driven plate 302. The active plate 301 and the driven plate 302 are rotatably connected to the inner wall of opposite sides of the frame. The active plate 301 and the driven plate 302 are connected by a sleeve shaft 303 through a quick-release bolt threaded connection.

[0027] The spray frame 7 is internally rotatably connected to a reciprocating screw 701, and the surface of the spray frame 7 is slidably connected to a moving platform 702. The bottom of the moving platform 702 extends into the interior of the spray frame 7 and is sleeved on the outer wall of the reciprocating screw 701. The top of the moving platform 702 is fixedly connected to a storage box 703 and a high-pressure nozzle 704, and the high-pressure nozzle 704 and the storage box 703 are connected by a pipe.

[0028] In this embodiment, as Figure 1As shown, the first conveyor rollers 5 and the second conveyor rollers 8 are connected by a sprocket assembly 16. The sprocket assembly 16 rotates on one side of the outer wall of the frame of the first conveyor rollers 5 and the second conveyor rollers 8. The sprocket assembly 16 consists of two sets of sprockets and chains meshing on the outside of the sprockets. The sprockets are fixedly connected to the shaft heads of their corresponding first conveyor rollers 5 and second conveyor rollers 8. The moving platform 702 reciprocates between the second conveyor rollers 8. A vision module is fixedly connected between the storage box 703 and the high-pressure nozzle 704. Roller 5 and the second conveying roller 8 both form a transmission structure through the sprocket assembly 16 and respectively serve as components for guiding the conveying of the film and the fabric. The high-pressure nozzle 704 can spray the adhesive in the storage tank 703 at a certain pressure. Combined with the vision module and the external control unit, the spraying range is precisely controlled. Compared with the traditional method of directly heating the film to make it heat-melt and adhere, this uniformly distributed adhesive can better fill the tiny pores and uneven areas on the surface of the fabric. After that, the rolling process helps to reduce air bubbles and wrinkles between the film and the fabric.

[0029] In this embodiment, as Figure 1 and Figure 2 As shown, the height of the first conveying roller 5 is higher than that of the fabric unwinding frame 2 and the first tensioning roller 6, and the fabric unwinding frame 2, the first conveying roller 5 and the first tensioning roller 6 together constitute the first conveying system. The height of the second conveying roller 8 and the second tensioning roller 9 is higher than that of the spraying frame 7, and the protective film unwinding frame 3, the second conveying roller 8 and the second tensioning roller 9 together constitute the second conveying system. Since the film and the fabric may have different physical properties, two independent conveying systems are set up, and the tension is adjusted separately by using the roller structure with different heights and their respective characteristics. They mesh at the overlap point under appropriate tension, thereby achieving more precise application.

[0030] In this embodiment, as Figure 1 , Figure 2 and Figure 4 As shown, cylinders 17 are fixedly connected to the surfaces of the first tensioning roller 6, the second tensioning roller 9, the third tensioning roller 10, and the upper extrusion roller 12. The cylinders 17 on the surfaces of the second tensioning roller 9, the third tensioning roller 10, and the upper extrusion roller 12 are distributed in the same direction, with their power output ends pointing from top to bottom. The first tensioning roller 6 and the second tensioning roller 9 move relative to each other via the cylinders 17. By setting cylinders 17 on the frames of the first tensioning roller 6, the second tensioning roller 9, and the third tensioning roller 10, the tension of the fabric and the film can be adjusted separately. The first tensioning roller 6 is located between the first conveying rollers 5 and acts as a structure for tensioning the fabric. The second tensioning roller 9 is located between the protective film unwinding frame 3 and the second conveying roller 8 and acts as a film tensioning structure. The third tensioning roller 10 is located at the point where the fabric and the film overlap, and can apply appropriate pressure to the fabric and the film that have already begun to bond, further ensuring their tight bonding.

[0031] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, the pressure plate 15 is correspondingly located between the second tension roller 9 and the spray frame 7, and between the second conveyor roller 8 and the third tension roller 10. The outer walls of the second conveyor roller 8 and the first conveyor roller 5 are fitted with a structure identical to the limiting member 11, but with an inner diameter identical to the diameters of the second conveyor roller 8 and the first conveyor roller 5. The limiting member 11 consists of two semi-circular metal parts connected at one end by a hinge, and the other end is connected by a quick-release bolt. The inner walls of both semi-circles are covered with a rubber layer. The pressure plate 15 is placed in key areas through which the fabric passes, especially in the area between the spray frame 7 and the third tension roller 10, effectively limiting the lateral movement of the fabric. Made of a relatively smooth material with a low coefficient of friction with the fabric, it ensures stable fabric transport while providing sufficient constraint. Compared to most simple rollers, this additional feature can be opened and fitted onto the surface of the roller used for conveying materials. Depending on the material specifications, the edges of the material are tightly fixed at the appropriate positions at both ends, effectively preventing the material from shifting on the roller surface when unwinding and causing misalignment at subsequent bonding points. The limiting component 11 enables precise material positioning and constraint, making the entire production process more stable and reliable. Furthermore, its openable structure makes loading and unloading very convenient.

[0032] In this embodiment, as Figure 4 As shown, the shafts of the third tension roller 10, the upper extrusion roller 12, and the lower extrusion roller 13 are hollow, and the heating modules are distributed in a ring inside the hollow cavity. Servo motors are installed on one side of the outer wall of the upper extrusion roller 12 and the lower extrusion roller 13, and relative motion is formed by the servo motors. After the film and fabric are initially bonded by the third tension roller 10, the adhesive on the fabric surface plays a better role when passing through the upper extrusion roller 12 and the lower extrusion roller 13. By spraying adhesive on the fabric in advance, the adhesive provides more favorable reaction conditions for the adhesive based on the synergistic effect of heating and extrusion, as well as the combined roller structure with high and low distribution, which greatly improves the stability and consistency of the coating quality. This allows the bonded material to be smoothly wound up by the winding frame 4. At the same time, the upper extrusion roller 12 is height-adjusted by the cylinder 17, thereby adjusting the distance between it and the lower extrusion roller 13 to adapt to the combination of film and fabric of different thicknesses.

[0033] In this embodiment, as Figure 6As shown, the internal structure of the fabric unwinding frame 2 and the rewinding frame 4 is identical to that of the protective film unwinding frame 3. Both the active disc 301 and the driven disc 302 have slots through which the connecting sleeve shaft 303 is inserted. Furthermore, the outer walls of the connecting sleeve shaft 303, the first conveying roller 5, and the second conveying roller 8 are all engraved with scales. Currently, the limiting structures on the surface of the rollers conveying the material in laminating machines are either fixed or movable. Fixed structures have limited versatility, while movable structures, when adjusted, can lead to inconsistent adjustment positions due to the lack of reference, affecting subsequent processing quality. In contrast, the surfaces of each roller conveying the fabric and film are engraved with scales. When used in conjunction with the limiting component 11, which is adjustable to accommodate fabrics and films of different widths, and with a ruler as a reference, the position of the limiting component 11 can be accurately adjusted according to the ruler regardless of the width of the material, thus fulfilling the function of material positioning. At the same time, since the fabric unwinding frame 2, the protective film unwinding frame 3, and the winding frame 4 are used for installing and removing materials, the connection method between the connecting sleeve shaft 303 and the driving disc 301 and the driven disc 302 provides convenience for loading and unloading. It does not require complicated special tools and can quickly install new fabric rolls, thereby improving the overall production efficiency.

[0034] The method of use and advantages of this utility model: The working process of this non-woven fabric coating device with positioning function is as follows:

[0035] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, firstly, the fabric material and film material are installed on the fabric unwinding frame 2 and the protective film unwinding frame 3, respectively. Simultaneously, the core for winding the finished product is installed on the winding frame 4. During installation, the operation method is consistent: the surfaces of the driving disc 301 and driven disc 302 are disassembled from the quick-release bolts of the connecting shaft 303. The material is then fitted onto its outside. The positions of the limiting members 11 at both ends are adjusted according to the material specifications, and the limiting members 11 at different positions are adjusted according to the scale on the corresponding roller surface. Firstly, the operator manually draws the fabric from the fabric unwinding frame 2, allowing it to pass through the first conveyor at the adjacent end. The fabric is first bonded to the top of roller 5, then guided to the bottom of the first tensioning roller 6, and then stretched from the surface of another set of first conveyor rollers 5 to the position of processing table 1. Afterwards, the position of pressure plate 15 is adjusted using screw 14 to fix the fabric in place, preventing lateral shifting during subsequent conveying. Simultaneously, the operator manually stretches the film from the protective film unwinding frame 3, bonding it from below the second tensioning roller 9, and then from the top of the two sets of second conveyor rollers 8. When the fabric is manually stretched to below the spray frame 7, the high-pressure nozzle 704 sprays the adhesive from the storage box 703 at a certain pressure. Simultaneously, the high-pressure nozzle 704 reciprocates and sprays the fabric surface via the moving platform 702, forming a uniform adhesive layer on the fabric surface. The vision module is connected to the external control unit to precisely control the spraying range, ensuring that the adhesive is evenly distributed on the fabric surface. Under manual stretching by the operator, the sprayed fabric is pulled to the surface of the lower extrusion roller 13. At the same time, the film on the surface of the second conveying roller 8 is inserted and introduced into the lower extrusion roller 13 and adhered to the fabric with adhesive on its surface. At this time, the third tensioning roller 10 is located at the overlap point of the fabric and the film, and the cylinder 17 on its frame can drive the third tensioning roller 10 to reciprocate. The three tension rollers 10 descend, applying appropriate pressure to the fabric and film that have already begun to bond, further ensuring their tight adhesion and completing the initial bonding. The film and fabric pass between the upper extrusion roller 12 and the lower extrusion roller 13, where the heating module allows the adhesive to function better under the synergistic effect of heating and extrusion. The first bonded end is manually wound onto the winding frame 4. Subsequently, with the synergistic action of various rollers, sprocket assembly 16, and other components, automated conveying and winding can be achieved. At the same time, the tension of the corresponding rollers is adjusted by the cylinder 17 according to the state of the fabric and film during the processing.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A nonwoven fabric coating device with positioning function, comprising a processing table (1), characterized in that: One end of the processing table (1) is rotatably connected to a fabric unwinding frame (2) and a protective film unwinding frame (3), and the other end of the processing table (1) is rotatably connected to a winding frame (4). A first conveying roller (5) is rotatably connected between the fabric unwinding frame (2) and the processing table (1), and a first tensioning roller (6) is rotatably connected between the first conveying rollers (5). A spraying frame (7) is bolted to the surface of the processing table (1), and a second conveying roller (8) is rotatably connected to both ends of the spraying frame (7). A second tensioning roller (9) and a third tensioning roller (10) are rotatably connected to the surface of the processing table (1). The second tension roller (9) and the third tension roller (10) are located on one side of the corresponding second conveying roller (8), and the second tension roller (9) is located directly above the first tension roller (6). The outer walls of the first conveying roller (5) and the second conveying roller (8) are fitted with limiters (11). The third tension roller (10) and the winding frame (4) are rotatably connected by an upper extrusion roller (12) and a lower extrusion roller (13). The surface of the processing table (1) is penetrated by an L-shaped upright and threaded with a screw (14). The bottom shaft of the screw (14) is rotatably connected to a pressure plate (15). The protective film unwinding frame (3) consists of an active plate (301) and a driven plate (302). The active plate (301) and the driven plate (302) are rotatably connected to the inner wall of opposite sides of the frame. The active plate (301) and the driven plate (302) are connected by a sleeve shaft (303) through a quick-release bolt. The spray frame (7) is rotatably connected to a reciprocating screw (701) inside, and a moving platform (702) is slidably connected to the surface of the spray frame (7). The bottom of the moving platform (702) extends into the interior of the spray frame (7) and is sleeved on the outer wall of the reciprocating screw (701). A storage tank (703) and a high-pressure nozzle (704) are fixedly connected to the top of the moving platform (702), and the high-pressure nozzle (704) and the storage tank (703) are connected by a pipe.

2. The nonwoven fabric coating device with positioning function according to claim 1, characterized in that: The first conveying rollers (5) and the second conveying rollers (8) are connected by a sprocket assembly (16). The sprocket assembly (16) rotates on one side of the outer wall of the frame of the first conveying rollers (5) and the second conveying rollers (8). The sprocket assembly (16) consists of two sets of sprockets and a chain meshing with the outside of the sprockets. The sprockets are fixedly connected to the shaft heads of their corresponding first conveying rollers (5) and second conveying rollers (8). The moving platform (702) reciprocates between the second conveying rollers (8). A vision module is fixedly connected between the storage box (703) and the high-pressure nozzle (704).

3. The nonwoven fabric coating device with positioning function according to claim 1, characterized in that: The height of the first conveying roller (5) is higher than that of the fabric unwinding frame (2) and the first tensioning roller (6), and the fabric unwinding frame (2), the first conveying roller (5) and the first tensioning roller (6) constitute a first conveying system. The height of the second conveying roller (8) and the second tensioning roller (9) is higher than that of the spraying frame (7), and the protective film unwinding frame (3), the second conveying roller (8) and the second tensioning roller (9) constitute a second conveying system.

4. The nonwoven fabric coating device with positioning function according to claim 1, characterized in that: Cylinders (17) are fixedly connected to the frame surfaces of the first tension roller (6), the second tension roller (9), the third tension roller (10), and the upper extrusion roller (12). The cylinders (17) on the surfaces of the second tension roller (9), the third tension roller (10), and the upper extrusion roller (12) are distributed in the same direction, and the direction of their power output ends is from top to bottom. The first tension roller (6) and the second tension roller (9) are in relative motion via the cylinders (17).

5. A nonwoven fabric coating device with positioning function according to claim 1, characterized in that: The pressure plate (15) is located between the second tension roller (9) and the spray frame (7) and between the second conveying roller (8) and the third tension roller (10). The outer walls of the second conveying roller (8) and the first conveying roller (5) are fitted with a structure that is consistent with the structure of the limiting member (11), but the inner diameter is consistent with the diameter of the second conveying roller (8) and the first conveying roller (5). The limiting member (11) is composed of two semi-circular metal parts connected at one end by a hinge and the other end is connected by a quick-release bolt thread. At the same time, the inner walls of the two semi-circles are covered with a rubber layer.

6. A nonwoven fabric coating device with positioning function according to claim 1, characterized in that: The shafts of the third tension roller (10), the upper extrusion roller (12) and the lower extrusion roller (13) are hollow, and the heating modules are distributed in a ring inside the hollow cavity. A servo motor is provided on one side of the outer wall of the upper extrusion roller (12) and the lower extrusion roller (13), and relative motion is formed by the servo motor.

7. A nonwoven fabric coating device with positioning function according to claim 1, characterized in that: The fabric unwinding frame (2) and rewinding frame (4) have the same internal structure as the protective film unwinding frame (3), and the surfaces of the active disc (301) and the driven disc (302) are both provided with slots for inserting and connecting the sleeve shaft (303), and the outer walls of the sleeve shaft (303), the first conveying roller (5) and the second conveying roller (8) are all engraved with scales.

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