Air permeability detection device and detection method for textile fabrics

Abstract

This invention relates to the field of textile fabric manufacturing technology, and particularly to a device and method for testing the air permeability of textile fabrics. It includes an exit end and a take-up end, with a testing frame positioned between them. Several sets of air permeability testing units are arranged at equal intervals on the testing frame, and a flattening unit is provided between each adjacent set of air permeability testing units. Each air permeability testing unit includes a first electric slide, with a lifting plate mounted on its output end. Two sets of material-stopping mechanisms are symmetrically arranged at the upper and lower edges of the lifting plate. Compared with traditional static sampling tests, this invention can perform air permeability tests on all parts of the entire roll of fabric, and simulates the actual compression or folding of the fabric by human movement when wearing clothing made from this fabric through a corrugated motion, thus improving both the comprehensiveness and realism of the test.

Description

Technical Field

[0001] This invention belongs to the field of textile fabric manufacturing technology, and specifically relates to a device and method for testing the air permeability of textile fabrics. Background Technology

[0002] The breathability of textile fabrics has always been an important standard for measuring their quality. In order to know how breathable the fabric is, it is necessary to conduct breathability testing.

[0003] A search revealed a patent document with publication number CN118961548B, published on December 20, 2024, entitled "A Test Device for the Air Permeability of Textile Fabrics." This document includes a test chamber with interconnected upper and lower cavities. The layered design of the test chamber facilitates air permeability testing within a relatively enclosed space. A load-bearing bracket is fixedly installed at the lower end of the lower cavity, and a drive motor is fixedly mounted on the load-bearing bracket. The test chamber is equipped with a first limiting mechanism for fixing the fabric from both sides via the drive motor. The first limiting mechanism includes a ball screw rotatably mounted in the lower cavity and fixedly connected to the output end of the drive motor, with a lifting nut fitted onto the ball screw. In this embodiment, the ball screw and lifting nut pull on a guide block and a guide rod, causing the guide rod to support the left-right movement of the limiting clamp. Simultaneously, a limiting pressure element within the limiting clamp achieves limiting fixation, thereby clamping and limiting the fabric from both sides.

[0004] However, the above embodiments still have the following drawbacks:

[0005] The above embodiments can only sample a portion of the fabric for testing, failing to provide a comprehensive inspection of the entire fabric. This leads to blind spots in the inspection and reduces its accuracy. Furthermore, since the fabric is stationary during testing, it cannot simulate the actual compression or folding of the fabric caused by movement when a person wears clothing made from it. This not only reduces the comprehensiveness of the inspection but also diminishes its realism. Summary of the Invention

[0006] To address the above problems, the present invention provides an air permeability testing device for textile fabrics, including an exit end and a take-up end, a testing frame is provided between the exit end and the take-up end, and several sets of air permeability testing units are arranged at equal intervals on the testing frame, and a set of flattening unit is provided between each two adjacent sets of air permeability testing units.

[0007] The air permeability testing unit includes a first electric slide table, on the output end of which a lifting plate is installed. Two sets of material-stopping mechanisms are symmetrically arranged at the upper and lower edges of the lifting plate. Air-jet mechanisms and image acquisition components are symmetrically arranged on the outer walls of both sides of the material-stopping mechanisms. The upper set of air-jet mechanisms and image acquisition components correspond to the lower set of image acquisition components and air-jet mechanisms.

[0008] The fabric passes through the two sets of material-blocking mechanisms in each group of breathability test units in sequence. The first electric slide of each group drives the material-blocking mechanisms to rise and fall at a uniform speed, simulating the simultaneous swinging of the fabric at multiple points in actual use.

[0009] Furthermore, several sets of vertical sliding grooves are arranged at equal intervals on one side wall of the testing frame, and several sets of fixed pipe clamping grooves are arranged at equal intervals along the vertical direction on the inner wall of the vertical sliding grooves. The number of vertical sliding grooves is the same as that of the leveling unit.

[0010] Furthermore, a lifting plate is installed on the output end of the first electric slide table, and two sets of movable mounting blocks are symmetrically arranged at the upper and lower edges of the lifting plate. A fixing strip is installed on the side of the movable mounting block away from the lifting plate in the horizontal direction; the two sets of material-blocking mechanisms are respectively installed on the two side walls of the two sets of fixing strips symmetrically opposite each other.

[0011] Furthermore, the material-supporting mechanism includes a material-supporting cylinder, the direction of which is the same as that of the fixing bar. A set of supporting rings are respectively sleeved at the two ends of the material-supporting cylinder. A sensing groove is opened on the supporting ring, and a pressure sensor is installed in the sensing groove. The input end of the pressure sensor is flush with the opening height of the sensing groove. Several sets of openings are arranged at equal intervals along the length of the material-supporting cylinder.

[0012] Furthermore, a first rotating rod is rotatably connected inside the material-supporting cylinder. Several sets of feeding wheels, the same number as the number of openings, are arranged at equal intervals on the first rotating rod. The sidewall of each set of feeding wheels extends to the outside of the material-supporting cylinder through a corresponding set of openings, and the edge is flush with the material-supporting ring.

[0013] Furthermore, the leveling unit includes a load-bearing block, which is installed on the side wall of the detection frame away from the vertical slide groove. A vertical plate is installed on the load-bearing block, and a second electric slide is provided on the vertical plate along the vertical direction. A set of servo motors is installed on the output end of the second electric slide and at the bottom edge of the vertical plate. A set of material leveling mechanism is drivenly connected to the output end of the two sets of servo motors, and the two sets of material leveling mechanisms are arranged symmetrically to each other.

[0014] Furthermore, the end of the material leveling mechanism away from the servo motor is rotatably connected to a sealed bearing seat, and the other end of the sealed bearing seat is equipped with a heat inlet pipe. The other end of the heat inlet pipe extends to the outside of the detection frame through a corresponding set of vertical sliding grooves; the pipe body of the heat inlet pipe is snapped into any set of fixed pipe slots.

[0015] Furthermore, the material leveling mechanism includes a second rotating rod, one end of which is connected to the output end of a servo motor, and the other end is connected to a heat inlet pipe through a sealed bearing seat; a first set of rollers and a second set of rollers are sleeved on the second rotating rod, and the first set of rollers and the second set of rollers are symmetrically arranged with the horizontal center line of the second rotating rod as the axis.

[0016] Furthermore, the first set of rollers has a first threaded groove, and the second set of rollers has a second threaded groove, with the thread directions of the first threaded groove and the second threaded groove being opposite; the second rotating rod, the first set of rollers, and the second set of rollers are all made of heat-conducting material.

[0017] A method for testing the air permeability of textile fabrics using a testing device, the method comprising:

[0018] The fabric roll wrapped with the fabric is attached to the exit end, and then the exposed end of the fabric is passed through the gap between the two sets of material-stopping mechanisms on each set of air permeability test units and each set of flattening units in turn, and finally fixed on a set of fabric rolls on the take-up end.

[0019] Turn on the switch at the take-up end to allow the fabric to move from the feed end to the take-up end.

[0020] At the same time, the first electric slide of each group is activated, and each first electric slide drives its corresponding set of material-blocking mechanisms to rise and fall at a uniform speed, so that the fabric moves in a wavy shape during the winding process.

[0021] When the fabric bulges, a set of jetting mechanisms below works to spray steam, and a set of image acquisition components below captures images of the steam passing through the fabric, thereby determining the fabric's breathability.

[0022] As the fabric descends, a set of jetting mechanisms above sprays steam, which is observed by a set of image acquisition components below. This process is repeated to simulate the real environment when a person wears clothing made of this fabric, and the fabric is squeezed or folded due to movement.

[0023] After the fabric test is completed, the wrinkled fabric is spread out evenly using the flattening unit, and the residual steam on the surface is dried.

[0024] The testing is completed after the fabric has passed through all the breathability test units and the flattening unit, and is finally wound onto the take-up end.

[0025] The beneficial effects of this invention are:

[0026] 1. During fabric winding, several sets of breathability test units are arranged at equal intervals along the winding path. Utilizing the characteristic that two sets of material-supporting mechanisms within each unit can rise and fall at a uniform speed, causing the fabric to bulge or concave, the winding path of the fabric exhibits a regular wavy motion. Simultaneously, two sets of upper and lower jet spray mechanisms alternately inject steam. Then, two corresponding image acquisition components detect the steam passing through the fabric from the other side, thus achieving the purpose of breathability testing. Compared to traditional static sampling tests, breathability testing can be performed on all parts of the entire roll of fabric. Furthermore, the wavy motion simulates the real-world compression or folding of the fabric caused by human movement when wearing clothing made from this fabric, improving both the comprehensiveness and realism of the test.

[0027] 2. Several sets of high-pressure nozzles on the surface of the jet pipe are arranged at equal intervals, and the tilt angle increases from the middle set to the sides. This makes the side view of each set of high-pressure nozzles form a fan-shaped annular structure. The steam they spray is also sprayed radially onto the fabric, thereby increasing the contact area between the steam and the fabric, reducing blind spots in the test, and improving the accuracy of the test.

[0028] 3. After the fabric passes through a set of breathability testing units near the exit end during movement, it arrives between two sets of evenly spaced mechanisms. Since the threads of the first and second threaded grooves are opposite, the fabric with wrinkles in the center can be evenly spread to both sides by the thread guidance of the first and second threaded grooves, thus smoothing out the wrinkles on the fabric surface. This will not affect subsequent breathability testing or the final winding work, and no additional fabric finishing work is required. While ensuring the smoothness of fabric testing and winding work, it also shortens the working time and improves efficiency.

[0029] 4. Since the second rotating rod, the first set of rollers and the second set of rollers are all made of heat-conducting materials and are heated by an external heat source, the first set of rollers and the second set of rollers can heat and dry the residual steam on the fabric surface when they come into contact with the fabric. This ensures that the fabric is dry while achieving the breathability test, and avoids damage to the fabric caused by moisture condensed by steam, thereby ensuring the quality of the fabric.

[0030] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 A schematic diagram of the detection device according to an embodiment of the present invention is shown.

[0033] Figure 2 A schematic diagram of the structure of an air permeability testing unit according to an embodiment of the present invention is shown.

[0034] Figure 3 A schematic diagram showing the connection between the material-blocking mechanism and the fixing bar according to an embodiment of the present invention is provided.

[0035] Figure 4 A cross-sectional schematic diagram of the feeding mechanism according to an embodiment of the present invention is shown.

[0036] Figure 5 A schematic diagram of the jet mechanism according to an embodiment of the present invention is shown.

[0037] Figure 6 A schematic diagram of the structure of a paving unit according to an embodiment of the present invention is shown.

[0038] Figure 7 A schematic diagram showing the connection between the heat inlet pipe and the vertical sliding groove according to an embodiment of the present invention is shown.

[0039] Figure 8 A schematic diagram of the material leveling mechanism according to an embodiment of the present invention is shown.

[0040] Figure 9 A top view schematic diagram of the first and second sets of rollers according to an embodiment of the present invention is shown.

[0041] In the diagram: 100, Exit end; 200, Rewind end; 300, Inspection frame; 400, Air permeability test unit; 410, First electric slide; 411, Lifting plate; 420, Movable mounting block; 421, Fixing strip; 430, Material-stopping mechanism; 431, Material-stopping cylinder; 432, Material-supporting ring; 433, Induction groove; 434, Through port; 435, First rotating rod; 436, Feeding wheel; 440, Side support; 450, Air-jet mechanism; 451, Air-jet pipe; 452 453. Air inlet valve; 460. High-pressure nozzle; 500. Image acquisition component; 510. Leveling unit; 520. Load-bearing block; 521. Vertical plate; 522. Second electric slide table; 530. Servo motor; 540. Material leveling mechanism; 541. Second rotating rod; 542. First set of rollers; 543. Second set of rollers; 544. First threaded groove; 545. Second threaded groove; 550. Sealed bearing seat; 560. Heat inlet pipe; 600. Vertical sliding groove; 610. Fixed pipe clamping groove. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, 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.

[0043] This invention provides an air permeability testing device for textile fabrics, exemplarily, such as... Figure 1 As shown, it includes an exit end 100, and a take-up end 200 is arranged parallel to one side of the exit end 100.

[0044] An inspection frame 300 is provided between the exit end 100 and the take-up end 200. Several sets of vertical sliding grooves 600 are arranged at equal intervals on one side wall of the inspection frame 300, and several sets of fixed tube slots 610 are arranged at equal intervals along the vertical direction on the inner wall of the vertical sliding grooves 600. A roll of fabric is fitted onto the exit end 100, and then one end is fitted onto the take-up end 200. The take-up end 200 is controlled to rotate, allowing the fabric to pass through the inspection frame 300 sequentially during the winding process.

[0045] The detection frame 300 has an open structure at both ends near the unwinding end 100 and the rewinding end 200.

[0046] The testing frame 300 is equipped with several sets of air permeability testing units 400, which are arranged at equal intervals in the horizontal direction from the side near the unwinding end 100 to the side near the rewinding end 200. The air permeability testing units 400 are used to perform uniform lifting and lowering while testing the air permeability of the fabric, so as to simulate the shaking during actual use.

[0047] A flattening unit 500 is provided between each pair of adjacent air permeability testing units 400. The input end of the flattening unit 500 extends to the outside of the testing frame 300 through a vertical sliding groove 600, and the input end of the flattening unit 500 is movably engaged in any set of fixed tube slots 610. The flattening unit 500 is used to lay the fabric surface flat and dry any residual steam on the fabric surface.

[0048] Furthermore, the testing frame 300 is also provided with a steam generation component and a heat output component on one side.

[0049] For example, such as Figure 2 and Figure 3 As shown, the air permeability testing unit 400 includes a first electric slide 410. A lifting plate 411 is installed on the output end of the first electric slide 410. Two sets of movable mounting blocks 420 are symmetrically arranged at the upper and lower edges of the lifting plate 411. A fixing strip 421 is installed on the side of the movable mounting block 420 away from the lifting plate 411 in the horizontal direction.

[0050] For example, two sets of abutment mechanisms 430 are symmetrically arranged on opposite side walls of the two sets of fixing bars 421. Two sets of side supports 440 are symmetrically arranged on the outer side walls of the abutment mechanisms 430. An air jet mechanism 450 and an image acquisition component 460 are respectively mounted on the two sets of side supports 440. The upper set of air jet mechanisms 450 is located directly above the lower set of image acquisition components 460, and the upper set of image acquisition components 460 is located directly above the lower set of air jet mechanisms 450.

[0051] For example, such as Figure 4 As shown, the material-supporting mechanism 430 includes a material-supporting cylinder 431, which runs in the same direction as the fixing strip 421. A set of supporting rings 432 are respectively fitted onto the edges of both ends of the material-supporting cylinder 431. A sensing groove 433 is provided on the supporting ring 432, and a pressure sensor is installed inside the sensing groove 433. The input end of the pressure sensor is flush with the opening height of the sensing groove 433. Several sets of through-holes 434 are arranged at equal intervals along the length of the material-supporting cylinder 431.

[0052] For example, a first rotating rod 435 is rotatably connected inside the material-supporting cylinder 431. Several sets of feeding wheels 436 are arranged at equal intervals on the first rotating rod 435, the same number as the number of openings 434. The sidewall of each set of feeding wheels 436 extends to the outside of the material-supporting cylinder 431 through a corresponding set of openings 434, and the edge is flush with the material-supporting ring 432.

[0053] For example, such as Figure 5 As shown, the jet mechanism 450 includes a horizontally arranged jet pipe 451. One end of the jet pipe 451 is connected to an air intake valve 452, and the input end of the air intake valve 452 is connected to a steam generating component. Several sets of high-pressure nozzles 453 are arranged at equal intervals at the top of the jet pipe 451. The inclination angle of the sets of high-pressure nozzles 453 increases sequentially from the middle set to both sides, and the sets of high-pressure nozzles 453 are combined to form a radial structure.

[0054] First, the fabric roll wrapped with the fabric is fitted onto the exit end 100. Then, the exposed end of the fabric is sequentially passed through the gap between the two sets of abutment cylinders 431 on each set of air permeability test units 400, and finally fixed onto a set of fabric rolls on the take-up end 200. The take-up end 200 is started, and through the rotation of the take-up end 200, the fabric on the exit end 100 can be wound onto the fabric roll of the take-up end 200 at a uniform speed. At the same time as the fabric moves, each set of first electric slides 410 is started, and each set of first electric slides 410 drives its corresponding set of lifting plates 411 to rise and fall at a uniform speed, so that the fabric can exhibit a wavy shaking when moving. When the lifting plate 411 rises, the lower set of abutment cylinders 431 rises to contact the fabric, causing the joint to bulge. The rising fabric also compresses the support rings 432 on both sides, applying pressure to the pressure sensor in the sensing groove 433. The pressure sensor senses the pressure and sends a signal via its communication module to the air intake valve 452 control module of the lower set of jet pipes 451, allowing steam to enter the lower set of jet pipes 451 and be radially sprayed by each set of high-pressure nozzles 453. Then, the upper set of image acquisition components 460 captures images of the steam penetrating the fabric to determine its breathability. When the lifting plate 411 descends, the upper set of abutment cylinders 431 descends, and the upper set of jet pipes 451 sprays steam, which is observed by the lower set of image acquisition components 460. This causes the fabric to be repeatedly folded in two directions during movement, simulating the continuous movement of a person wearing clothing made of this fabric.

[0055] For example, such as Figure 6 and Figure 7As shown, the leveling unit 500 includes a load-bearing block 510, which is installed on the side wall of the detection frame 300 away from the vertical slide groove 600. A vertical plate 520 is installed on the load-bearing block 510, and a second electric slide 521 is provided on the vertical plate 520 along the vertical direction. A set of servo motors 530 is installed on the output end of the second electric slide 521 and at the bottom edge of the vertical plate 520. A set of material leveling mechanisms 540 is drivenly connected to the output ends of the two sets of servo motors 530, and the two sets of material leveling mechanisms 540 are arranged symmetrically to each other.

[0056] For example, the end of the material leveling mechanism 540 away from the servo motor 530 is rotatably connected to a sealed bearing seat 550, and the other end of the sealed bearing seat 550 is equipped with a heat inlet pipe 560. The other end of the heat inlet pipe 560 extends horizontally to the outside of the detection frame 300 through a corresponding set of vertical sliding grooves 600 and communicates with the heat output component. The pipe body of the heat inlet pipe 560 is movably engaged on any set of fixed pipe slots 610.

[0057] For example, such as Figure 8 and Figure 9 As shown, the material leveling mechanism 540 includes a second rotating rod 541. One end of the second rotating rod 541 is connected to the output end of the servo motor 530, and the other end is connected to the heat inlet pipe 560 through a sealed bearing seat 550. A first roller 542 and a second roller 543 are sleeved on the second rotating rod 541. The first roller 542 and the second roller 543 are symmetrically arranged about the horizontal centerline of the second rotating rod 541. A first threaded groove 544 is formed on the first roller 542, and a second threaded groove 545 is formed on the second roller 543. The thread directions of the first threaded groove 544 and the second threaded groove 545 are opposite. The second rotating rod 541, the first roller 542, and the second roller 543 are all made of thermally conductive material.

[0058] During fabric testing, repeated compression from both sides can easily cause edge curling. Therefore, a flattening unit 500 is installed between each pair of adjacent breathability test units 400. Before testing, the fabric is passed through the gap between the two leveling mechanisms 540 in each breathability test unit 400 and each flattening unit 500. Then, the second electric slide 521 is activated, which drives the upper leveling mechanism 540 to descend until both leveling mechanisms 540 can simultaneously adhere to the fabric from both sides. The heat is then transferred through the heat inlet pipe 560 to the second rotating rod 541 via the sealed bearing seat 550, thus heating both the first roller 542 and the second roller 543.

[0059] During the winding process at the take-up end 200, two sets of servo motors 530 are activated. The two sets of servo motors 530 drive the two sets of second rotating rods 541 to rotate in opposite directions. When the fabric passes through a set of breathability test units 400 near the exit end 100 during the movement, it comes between the two sets of evenly spaced mechanisms 540. Since the threads of the first thread groove 544 and the second thread groove 545 are opposite, the fabric with wrinkles at the center can be evenly spread to both sides by the thread guidance of the first thread groove 544 and the second thread groove 545, thereby smoothing out the wrinkles on the fabric surface and not affecting the subsequent breathability test and the final winding work. Meanwhile, since the second rotating rod 541, the first set of rollers 542 and the second set of rollers 543 are all made of heat-conducting materials and are heated by an external heat source, the first set of rollers 542 and the second set of rollers 543 can heat and dry the residual steam on the fabric surface when they come into contact with the fabric. This not only achieves the air permeability test, but also ensures the dryness of the fabric and avoids damage to the fabric due to moisture condensed by steam, thereby improving the winding effect of the fabric.

[0060] The above embodiments have the following beneficial effects:

[0061] 1. During fabric winding, several sets of breathability test units 400 are arranged at equal intervals along the winding path. Utilizing the characteristic that two sets of material-supporting mechanisms 430 within each breathability test unit 400 can rise and fall at a uniform speed, causing the fabric to bulge or concave, the winding path of the fabric exhibits a regular wavy motion. Simultaneously, two sets of upper and lower jet spraying mechanisms 450 alternately spray steam. Then, two corresponding image acquisition components 460 detect the steam passing through the fabric from the other side, thus achieving the purpose of breathability testing. Compared to traditional static sampling tests, breathability testing can be performed on all parts of the entire roll of fabric. Furthermore, the wavy motion simulates the real-world compression or folding of the fabric caused by human movement when wearing clothing made from this fabric, improving both the comprehensiveness and realism of the test.

[0062] 2. Several sets of high-pressure nozzles 453 on the surface of the jet pipe 451 are arranged at equal intervals, and the tilt angle increases from the middle set to both sides. This makes the side view cross section of each set of high-pressure nozzles 453 have a fan-shaped annular structure. The steam it sprays is also sprayed radially onto the fabric, thereby increasing the contact area between the steam and the fabric, reducing test dead zones, and improving the accuracy of the test.

[0063] 3. After the fabric passes through a set of breathability testing units 400 near the exit end 100 during movement, it comes between two sets of evenly spaced mechanisms 540. Since the threads of the first thread groove 544 and the second thread groove 545 are opposite, the fabric with wrinkles at the center can be evenly spread to both sides by the thread guidance of the first thread groove 544 and the second thread groove 545, thereby smoothing out the wrinkles on the fabric surface. This will not affect the subsequent breathability test or the final winding work. No additional fabric finishing work is required. While ensuring the smoothness of fabric testing and winding work, it also shortens the working time and improves efficiency.

[0064] 4. Since the second rotating rod 541, the first set of rollers 542 and the second set of rollers 543 are all made of heat-conducting materials and are heated by an external heat source, the first set of rollers 542 and the second set of rollers 543 can heat and dry the residual steam on the fabric surface when they come into contact with the fabric. This ensures that the fabric is dry while achieving the air permeability test, and avoids damage to the fabric caused by moisture condensed from the steam, thus ensuring the quality of the fabric.

[0065] Based on the aforementioned air permeability testing device for textile fabrics, this invention also proposes a testing method for the device. Exemplarily, the testing method includes:

[0066] The fabric roll with the fabric wound around it is attached to the exit end. Then, the exposed end of the fabric is passed through the gap between the two sets of material-stopping mechanisms on each group of air permeability test units and the gap between the two sets of material-eventing mechanisms on each group of flattening units, and finally fixed on a set of fabric rolls on the take-up end.

[0067] Turn on the switch at the take-up end to allow the fabric to move from the feed end to the take-up end.

[0068] At the same time, the first electric slide of each group is activated, and each first electric slide drives its corresponding set of material-blocking mechanisms to rise and fall at a uniform speed, so that the fabric moves in a wavy shape during the winding process.

[0069] When the fabric bulges, a set of jetting mechanisms below works to spray steam, and a set of image acquisition components below captures images of the steam passing through the fabric, thereby determining the fabric's breathability.

[0070] As the fabric descends, a set of jetting mechanisms above sprays steam, which is observed by a set of image acquisition components below. This process is repeated to simulate the real environment when a person wears clothing made of this fabric, and the fabric is squeezed or folded due to movement.

[0071] After the fabric test is completed, as the movement continues, it arrives at the adjacent set of flattening units. Through the two sets of second rotating rods rotating in opposite directions, the first set of rollers and the second set of rollers spread the fabric folded in the center evenly to both sides.

[0072] Simultaneously, the first and second sets of rollers are heated so that the heat energy dries the residual steam on the fabric surface.

[0073] The testing is completed after the fabric has passed through all the breathability test units and the flattening unit, and is finally wound onto the take-up end.

[0074] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for testing the air permeability of textile fabrics, comprising an exit end (100) and a take-up end (200), characterized in that: A testing frame (300) is provided between the unwinding end (100) and the rewinding end (200). Several sets of air permeability test units (400) are arranged at equal intervals on the testing frame (300). A flattening unit (500) is provided between each pair of adjacent sets of air permeability test units (400). The air permeability testing unit (400) includes a first electric slide (410), and a lifting plate (411) is installed on the output end of the first electric slide (410). Two sets of material-stopping mechanisms (430) are symmetrically arranged at the upper and lower edges of the lifting plate (411). Air-jet mechanisms (450) and image acquisition components (460) are symmetrically arranged on the outer walls of both sides of the material-stopping mechanisms (430). The upper set of air-jet mechanisms (450) and image acquisition components (460) correspond to the lower set of image acquisition components (460) and air-jet mechanisms (450). The material-supporting mechanism (430) includes a material-supporting cylinder (431), and a set of material-supporting rings (432) are respectively sleeved at the two ends of the material-supporting cylinder (431). A sensing groove (433) is opened on the material-supporting ring (432), and a pressure sensor is provided in the sensing groove (433). The input end of the pressure sensor is flush with the opening height of the sensing groove (433). A first rotating rod (435) is rotatably connected inside the material-supporting cylinder (431). Several sets of feeding wheels (436) are arranged at equal intervals on the first rotating rod (435) and the through-hole (434). The sidewall of each set of feeding wheels (436) extends to the outside of the material-supporting cylinder (431), and the edge is flush with the material-supporting ring (432). The leveling unit (500) includes a material leveling mechanism (540), which includes a second rotating rod (541). A first roller (542) and a second roller (543) are sleeved on the second rotating rod (541). The first roller (542) and the second roller (543) are symmetrically arranged about the horizontal center line of the second rotating rod (541). A first threaded groove (544) is opened on the first roller (542), and a second threaded groove (545) is opened on the second roller (543). The thread directions of the first threaded groove (544) and the second threaded groove (545) are opposite. The fabric passes through the two sets of abutment mechanisms (430) of each group of breathability test units (400) in sequence. The first electric slide (410) of each group drives the abutment mechanism (430) to rise and fall at a constant speed, simulating the simultaneous swing of the fabric at multiple points in actual use.

2. The air permeability testing device for textile fabrics according to claim 1, characterized in that: The detection frame (300) has several sets of vertical sliding grooves (600) arranged at equal intervals on one side wall. The vertical sliding grooves (600) have several sets of fixed pipe slots (610) arranged at equal intervals along the vertical direction on the inner wall of the vertical sliding grooves (600). The number of vertical sliding grooves (600) is the same as that of the leveling unit (500).

3. The air permeability testing device for textile fabrics according to claim 1, characterized in that: A lifting plate (411) is installed on the output end of the first electric slide (410). Two sets of movable mounting blocks (420) are symmetrically arranged at the upper and lower edges of the lifting plate (411). A fixing strip (421) is installed on the side of the movable mounting block (420) away from the lifting plate (411) in the horizontal direction. The two sets of material-blocking mechanisms (430) are respectively installed on the two side walls of the two sets of fixing strips (421) symmetrically.

4. The air permeability testing device for textile fabrics according to claim 3, characterized in that: The direction of the material support cylinder (431) is the same as that of the fixing bar (421), and a number of openings (434) are arranged at equal intervals along its own length direction on the material support cylinder (431).

5. The air permeability testing device for textile fabrics according to claim 4, characterized in that: The number of feeding wheels (436) and openings (434) is the same, and the sidewall of each set of feeding wheels (436) extends to the outside of the feed cylinder (431) through a corresponding set of openings (434).

6. The air permeability testing device for textile fabrics according to claim 2, characterized in that: The leveling unit (500) includes a load-bearing block (510), which is installed on the side wall of the detection frame (300) away from the vertical slide groove (600). A vertical plate (520) is installed on the load-bearing block (510). A second electric slide (521) is provided on the vertical plate (520) along the vertical direction. A set of servo motors (530) are installed on the output end of the second electric slide (521) and at the bottom edge of the vertical plate (520). The two sets of material leveling mechanisms (540) are respectively connected to the output ends of the two sets of servo motors (530). The two sets of material leveling mechanisms (540) are symmetrically arranged.

7. The air permeability testing device for textile fabrics according to claim 6, characterized in that: The material leveling mechanism (540) is rotatably connected to a sealed bearing seat (550) at one end away from the servo motor (530). A heat inlet pipe (560) is installed at the other end of the sealed bearing seat (550). The other end of the heat inlet pipe (560) extends to the outside of the detection frame (300) through a corresponding set of vertical sliding grooves (600). The pipe body of the heat inlet pipe (560) is snapped onto any set of fixed pipe slots (610).

8. The air permeability testing device for textile fabrics according to claim 7, characterized in that: One end of the second rotating rod (541) is connected to the output end of the servo motor (530), and the other end is connected to the heat inlet pipe (560) through the sealed bearing seat (550).

9. The air permeability testing device for textile fabrics according to claim 8, characterized in that: The second rotating rod (541), the first set of rollers (542), and the second set of rollers (543) are all made of heat-conducting material.

10. A testing method for the air permeability testing device for textile fabrics according to any one of claims 1-9, characterized in that: The detection method includes: The fabric roll wrapped with the fabric is attached to the exit end, and then the exposed end of the fabric is passed through the gap between the two sets of material-stopping mechanisms on each set of air permeability test units and each set of flattening units in turn, and finally fixed on a set of fabric rolls on the take-up end. Turn on the switch at the take-up end to allow the fabric to move from the feed end to the take-up end. At the same time, the first electric slide of each group is activated, and each first electric slide drives its corresponding set of material-blocking mechanisms to rise and fall at a uniform speed, so that the fabric moves in a wavy shape during the winding process. When the fabric bulges, a set of jetting mechanisms below works to spray steam, and a set of image acquisition components below captures images of the steam passing through the fabric, thereby determining the fabric's breathability. As the fabric descends, a set of jetting mechanisms above sprays steam, which is observed by a set of image acquisition components below. This process is repeated to simulate the real environment when a person wears clothing made of this fabric, and the fabric is squeezed or folded due to movement. After the fabric test is completed, the wrinkled fabric is spread out evenly using the flattening unit, and the residual steam on the surface is dried. The testing is completed after the fabric has passed through all the breathability test units and the flattening unit, and is finally wound onto the take-up end.

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