Cloth air permeability detection device and method for garment processing

Abstract

The invention discloses a cloth air permeability detection device and method for garment processing, and relates to the technical field of cloth detection.The cloth air permeability detection device comprises a case, a pump machine is arranged at the bottom of an inner cavity of the case, a shell is arranged at the upper end of the pump machine, and an air control mechanism used for guiding the air flow direction is arranged at the bottom of an inner cavity of the shell; and a flow channel control mechanism is arranged on the outer surface of the air control mechanism. The air permeability of the same cloth under different mechanical conditions is compared and measured, initial positioning is completed in a natural relaxation state, uniform tension is cooperatively applied through the pressing mechanism and the sealing and pressing mechanism, so that the cloth enters a standard tensioning state, local stretching distortion caused by rigid clamping is avoided, and the air permeability of the cloth is improved. The first air permeability detection carried out in the state can more truly reflect the basic air permeability of the cloth in conventional wearing or processing, and is especially suitable for quality evaluation of elastic fabrics.

Description

Technical Field

[0001] This invention relates to the field of fabric testing technology, and in particular to a device and method for testing the air permeability of fabrics used in garment processing. Background Technology

[0002] For example, patent CN120369572A, entitled "A Textile Fabric Air Permeability Testing Device," relates to the field of fabric air permeability testing technology. It solves the problem that stretching the fabric leads to excessively high air permeability test results, making them unreliable. By controlling the heating module inside the warm air box and the blowing speed of the blower through an external circuit, the device blows air onto the fabric to simulate air permeability testing under normal wearing conditions. This avoids excessive stretching of the fabric, thus preventing the air permeability test results from being inflated and ensuring that the test results are authentic and directly referable.

[0003] However, in existing breathability testing of elastic or lightweight fabrics, measurement distortion often occurs due to improper clamping methods. In addition, the standard tests mentioned above can only reflect the breathability of the fabric in a static, flat state and cannot assess the changes in pore structure caused by stretching during movement. Furthermore, a single testing mode is difficult to take into account the needs of different material properties and diverse application scenarios. Therefore, this application provides a fabric breathability testing device and method for garment processing to meet the requirements. Summary of the Invention

[0004] The purpose of this application is to provide a fabric air permeability testing device and method for garment processing, which can effectively solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this application provides the following technical solution: a fabric breathability testing device for garment processing, comprising a housing, a pump being provided at the bottom of the inner cavity of the housing, a housing being provided at the top of the pump, a wind control mechanism for guiding the gas flow being provided at the bottom of the inner cavity of the housing, and a flow channel control mechanism being provided on the outer surface of the wind control mechanism. The outer surface of the flow channel control mechanism is provided with a stretching mechanism for stretching the fabric and causing it to deform, and the outer surface of the stretching mechanism is provided with a sealing mechanism, which is used to constrain the fabric to perform air permeability testing under two different mechanical states. The outer surface of the sealing mechanism is provided with a binding mechanism, which works with the stretching mechanism to constrain and deform the fabric. A control screen is provided on one side of the upper end of the machine box, and a pressing mechanism is provided inside the control screen. The pressing mechanism is used to work with the sealing mechanism to adjust and constrain the clamping state of the fabric.

[0006] The pressing mechanism includes a pressure rod, one end of which is installed inside the control panel. A sleeve is connected to one end of the pressure rod. A tablet pressing tube is slidably installed at the lower end of the sleeve, and a spring is provided between the tablet pressing tube and the sleeve. A first monitor is provided on the inner wall of the tablet pressing tube, and a first compression ring is provided at the lower end of the tablet pressing tube.

[0007] The air control mechanism includes an air duct, which is fixedly installed on the upper end of the outer shell. The outer surface of the air duct has air holes. An air intake head is provided inside the air duct, and one end of the air intake head is installed inside the air hole. An air outlet pipe communicating with the pump is provided at the bottom of the air duct. An air cavity shell is provided on the upper part of the inner wall of the air duct, and one end of the air outlet pipe extends through the air cavity shell into its interior.

[0008] The inner wall of the air cavity shell is provided with a flow control plate, the upper end of the flow control plate is provided with a flow guide ring, the lower end of the flow control plate is provided with an annular groove, and the upper end of the annular groove is provided with a plurality of vertically penetrating air blowing holes.

[0009] The flow channel control mechanism includes a mounting plate, an inner cover, and an outer cover. Both the inner and outer covers are fixedly installed on the inner wall of the air duct. A sealing ring is provided at the upper end of the inner cover. A second monitor is provided on the inner wall of the inner cover. The outer cover covers the outside of the air vent. The mounting plate is fixedly installed on the outer surface of the outer cover.

[0010] The stretching mechanism includes a cover, the inner wall of which is provided with an inner sealing ring, and the inner sealing ring is installed on the upper end of the sealing ring. The cover covers the upper end of the mounting piece, and the outer surface of the cover has a plurality of covering holes arranged in a ring array. The outer surface of the cover also has a retaining ring groove.

[0011] The sealing mechanism includes a rubber ring and a test fabric. The rubber ring covers the upper end of the cover, and the test fabric covers the outer surface of the cover.

[0012] The sealing mechanism includes a perforated plate, with pressure ribs at both ends of the upper end of the perforated plate, and a pressure edge ring on the outer surface of the perforated plate that cooperates with the rubber ring to hold the test fabric.

[0013] The binding mechanism includes a cover ring, a second compression ring at the lower end of the cover ring, a ring hoop on the outer surface of the second compression ring, and a plurality of friction blocks arranged in a ring array on the inner wall of the cover ring. The second compression ring cooperates with the retaining ring groove to clamp and stretch the test fabric.

[0014] This invention also provides a method for testing the air permeability of fabrics used in garment processing. The specific air permeability testing method is as follows: Step 1: First, the fabric to be tested is installed on the upper part of the stretching mechanism through the sealing mechanism. At this time, the fabric is in a naturally relaxed state. Then, the pressing mechanism moves down to apply pressure to the sealing mechanism, so that the sealing mechanism and the stretching mechanism work together to tension and clamp the fabric.

[0015] Step 2: After the pressing mechanism completes clamping the fabric inside the sealing mechanism, the binding mechanism is activated to apply a controllable tensile force to the fabric and fix it to the outer surface of the stretching mechanism. At this time, the fabric clamped by the pressing mechanism and the sealing mechanism is in a taut state, and the air permeability of the fabric in the taut state is tested by the air control mechanism.

[0016] Step 3: For the fabric stretched by the binding mechanism, its pore structure changes nonlinearly with the degree of stretching. The deformed fabric is stably fixed on the surface of the stretching mechanism. Then, the air permeability of the fabric in the extended deformation state is tested by the flow channel control mechanism in conjunction with the stretching mechanism.

[0017] In summary, the technical effects and advantages of this invention are as follows: 1. This invention compares the breathability of the same fabric under different mechanical conditions. First, the initial positioning is completed in a natural relaxed state. Then, a uniform tension is applied in coordination by the pressing mechanism and the sealing mechanism to bring the fabric into a standard tension state, avoiding local stretching distortion caused by rigid clamping. The first breathability test under this state can more realistically reflect the basic breathability performance of the fabric in normal wear or processing, and is especially suitable for the quality assessment of elastic fabrics.

[0018] 2. This invention uses a ring array of air holes in conjunction with a guide ring and a ring groove to rectify the airflow, allowing the airflow to penetrate the test fabric vertically and uniformly, avoiding turbulence or local impact caused by traditional single-point air intake. It is especially suitable for materials that are prone to vibration, such as ultra-lightweight yarn and chiffon. It also combines a first monitor and a second monitor to monitor the pressure difference between the two sides of the fabric in real time.

[0019] 3. This invention achieves controllable, uniform, and repeatable active stretching of the test fabric through the synergistic action of the cover ring, friction block, and second compression ring. Friction pulls the fabric downwards, and the second compression ring, embedded in a retaining ring groove, mechanically locks it in place. This ensures the fabric is flat and adheres to the cover surface in its stretched state, simulating the localized deformation of clothing caused by limb movement during actual wear. Simultaneously, the ring further enhances locking reliability, ensuring no loosening or slippage occurs during testing, thus accurately reflecting the porosity changes and breathability of elastic fabrics under dynamic strain. In this stretched state, a negative pressure suction testing mode is employed. The suction head draws gas from between the outer and inner covers through air holes. Utilizing the connecting cavity formed by the cover and sealing ring, the airflow passes vertically through the covered holes into the stretched test fabric, avoiding the fabric bulging or vibration problems easily caused by positive pressure blowing. This method is suitable for highly permeable, lightweight materials. Combined with measurements of flow rate and the pressure difference between the inside and outside of the cover, accurate breathability data under deformation can be obtained. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application 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 only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A first-view three-dimensional structural diagram of the fabric breathability testing device; Figure 2 A second-view three-dimensional structural diagram of the fabric breathability testing device; Figure 3 A third-view stereoscopic structural diagram of a fabric breathability testing device; Figure 4 A fourth-view three-dimensional structural diagram of the fabric breathability testing device; Figure 5 A schematic diagram of the three-dimensional connection structure between the pressing mechanism and the control panel; Figure 6 An exploded view of the three-dimensional connection structure of the pressing mechanism; Figure 7 This is a schematic diagram of the three-dimensional connection structure of the outer shell, the sealing mechanism, and the sealing mechanism. Figure 8 A first-person perspective three-dimensional connection structure diagram of the outer shell, tensioning mechanism, and wind control mechanism; Figure 9 A second-view three-dimensional connection structure diagram of the outer shell, tensioning mechanism, and wind control mechanism; Figure 10 A schematic diagram of the three-dimensional connection structure of the pump, tensioning mechanism, and air control mechanism; Figure 11 A schematic diagram of the three-dimensional connection structure between the pump and the air control mechanism; Figure 12 A schematic diagram of the three-dimensional connection structure of the risk control mechanism; Figure 13 This is a schematic diagram of the three-dimensional connection structure of the air cavity shell and the air cavity shell; Figure 14 This is a cross-sectional view of the three-dimensional connection structure of the flow control plate; Figure 15 A schematic diagram of the three-dimensional connection structure between the flow channel control mechanism and the pump. Figure 16 A schematic diagram of the three-dimensional connection structure between the risk control mechanism and the flow channel control mechanism; Figure 17 This is a schematic diagram of the three-dimensional connection structure of the tensioning mechanism; Figure 18 This is a three-dimensional sectional view of the connection structure of the tensioning mechanism; Figure 19 A schematic diagram of the three-dimensional connection structure between the sealing mechanism and the binding mechanism; Figure 20 An exploded view of the three-dimensional connection structure of the sealing mechanism; Figure 21 This is a three-dimensional sectional view of the sealing mechanism's connection structure. Figure 22 A schematic diagram of the three-dimensional connection structure of the strapping mechanism; Figure 23 This is a three-dimensional sectional view of the connection structure of the bundling mechanism.

[0022] In the diagram: 1. Chassis; 2. Control panel; 3. Pressing mechanism; 31. Pressure rod; 32. Sleeve; 33. Pressing tube; 34. First monitor; 35. Spring; 36. First compression ring; 4. Sealing mechanism; 41. Rubber ring; 42. Test fabric; 43. Perforated plate; 44. Pressing rib ring; 45. Pressing edge ring; 5. Binding mechanism; 51. Second compression ring; 52. Friction block; 53. Ring clamp; 54. Cover ring; 6. Tensioning mechanism; 61. Cover; 62. Snap ring groove; 63. Cover hole; 64. Inner sealing ring; 7. Air control mechanism; 71. Air duct; 72. Air hole; 73. Flow control plate; 74. Intake pipe head; 75. Air outlet duct; 76. Air chamber shell; 77. Flow guide ring; 78. Air blowing hole; 79. Ring groove; 8. Flow channel control mechanism; 81. Mounting plate; 82. Second monitor; 83. Inner cover; 84. Outer cover; 85. Sealing ring; 9. Pump; 10. Outer shell. Detailed Implementation

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

[0024] Example 1, Reference Figures 1 to 23 The device shown is a fabric air permeability testing device for garment processing, including a housing 1, a pump 9 is provided at the bottom of the inner cavity of the housing 1, a housing 10 is provided at the top of the pump 9, a wind control mechanism 7 for guiding the gas flow is provided at the bottom of the inner cavity of the housing 10, and a flow channel control mechanism 8 is provided on the outer surface of the wind control mechanism 7. The outer surface of the flow control mechanism 8 is provided with a stretching mechanism 6 for stretching the fabric and causing it to deform. The outer surface of the stretching mechanism 6 is provided with a sealing mechanism 4, which is used to constrain the fabric to perform air permeability testing under two different mechanical states. The outer surface of the sealing mechanism 4 is provided with a binding mechanism 5. The binding mechanism 5 works with the stretching mechanism 6 to constrain and deform the fabric. A control panel 2 is provided on one side of the upper end of the machine box 1. A pressing mechanism 3 is provided inside the control panel 2. The pressing mechanism 3 is used to work with the sealing mechanism 4 to adjust and constrain the clamping state of the fabric.

[0025] It is worth noting that the fabric to be tested is first installed on the upper part of the stretching mechanism 6 through the sealing mechanism 4. At this time, the fabric is in a naturally relaxed state. Then, the pressing mechanism 3 moves downward to apply pressure to the sealing mechanism 4, so that the sealing mechanism 4 and the stretching mechanism 6 work together to tension and clamp the fabric.

[0026] After the pressing mechanism 3 completes the clamping of the fabric in the sealing mechanism 4, the binding mechanism 5 is activated to apply a controllable tensile force to the fabric and fix it to the outer surface of the stretching mechanism 6. At this time, the fabric clamped by the pressing mechanism 3 and the sealing mechanism 4 is in a tensile state, and the air permeability of the fabric in the tensile state is tested by the air control mechanism 7.

[0027] Among them, the comparative measurement of the breathability of the same fabric under different mechanical conditions is first completed in the natural relaxed state. Then, the pressing mechanism 3 and the sealing mechanism 4 work together to apply uniform tension so that the fabric enters the standard tension state, avoiding local stretching distortion caused by rigid clamping. The first breathability test in this state can more realistically reflect the basic breathability performance of the fabric in normal wear or processing, and is especially suitable for the quality assessment of elastic fabrics.

[0028] For the fabric stretched by the binding mechanism 5, its pore structure changes nonlinearly with the degree of stretching. The deformed fabric is stably fixed on the surface of the stretching mechanism 6. Then, the air permeability of the fabric in the extended deformation state is tested by the flow channel control mechanism 8 in conjunction with the stretching mechanism 6.

[0029] Furthermore, by applying controllable and repeatable stretching deformation to the clamped fabric through the binding mechanism 5, the actual stretching conditions during human movement, sewing tension, or use are simulated. Since the pore structure of elastic fabrics changes non-linearly with the degree of stretching, such as pore expansion when stretched slightly and fiber densification when stretched excessively, this design can capture the response characteristics of breathability under dynamic deformation, thereby revealing performance inflection points or degradation risks that cannot be found by a single static test, and providing key data support for material selection and structural design of functional clothing.

[0030] Example 2: This example provides further technical solutions for the pressing mechanism 3, the air control mechanism 7, and the sealing mechanism 4.

[0031] The pressing mechanism 3 includes a pressure rod 31. One end of the pressure rod 31 is installed inside the control panel 2. One end of the pressure rod 31 is connected to a sleeve 32. A tablet pressing tube 33 is slidably installed at the lower end of the sleeve 32. A spring 35 is provided between the tablet pressing tube 33 and the sleeve 32. A first monitor 34 is provided on the inner wall of the tablet pressing tube 33. A first compression ring 36 is provided at the lower end of the tablet pressing tube 33.

[0032] The sealing mechanism 4 includes a rubber ring 41 and a test cloth 42. The rubber ring 41 covers the upper end of the cover 61, and the test cloth 42 covers the outer surface of the cover 61.

[0033] The sealing mechanism 4 includes a perforated plate 43. Both ends of the upper end of the perforated plate 43 are provided with pressing rib rings 44. The outer surface of the perforated plate 43 is provided with a pressing edge ring 45 that cooperates with the rubber ring 41 to hold the test fabric 42.

[0034] It is worth noting that the test fabric 42 is clamped between the rubber ring 41 and the perforated plate 43, and the pressure ring 45 secures the test fabric 42 to the outer ring of the rubber ring 41. When it is necessary to fix the test fabric 42 for air permeability testing, the pressure rod 31 drives the sleeve 32 to move downward. The movement of the sleeve 32 synchronously drives the pressure tube 33 to move downward, and causes the spring 35 to be compressed and contracted. At the same time, the pressure tube 33 drives the first extrusion ring 36 to press against the upper surface of the perforated plate 43. Under the continuous action of the first extrusion ring 36, the perforated plate 43 moves downward, thereby pushing the pressure rib ring 44 to apply pressure to the rubber ring 41. Through the synergistic action of the pressure rib ring 44 and the pressure ring 45, the test fabric 42 is reliably clamped and kept in a taut state, so that it will not deform due to external force during subsequent testing.

[0035] The air control mechanism 7 includes an air duct 71, which is fixedly installed on the upper end of the outer casing 10. An air hole 72 is opened on the outer surface of the air duct 71. An air intake head 74 is provided inside the air duct 71, and one end of the air intake head 74 is installed inside the air hole 72. An air outlet duct 75 communicating with the pump 9 is provided at the bottom of the air duct 71. An air cavity shell 76 is provided on the upper part of the inner wall of the air duct 71, and one end of the air outlet duct 75 extends through the air cavity shell 76 into its interior.

[0036] The inner wall of the air cavity shell 76 is provided with a flow control plate 73, the upper end of the flow control plate 73 is provided with a flow guide ring 77, the lower end of the flow control plate 73 is provided with an annular groove 79, and the upper end of the annular groove 79 is provided with a number of vertically penetrating air holes 78.

[0037] When the perforated plate 43 presses down on the rubber ring 41, the rubber ring 41 further presses the tensioning mechanism 6, thereby sealing the cavity between the air chamber shell 76 and the test fabric 42. At this time, the pump 9 sprays airflow into the air outlet pipe 75. The airflow is guided by the annular groove 79 at the bottom of the flow control plate 73, enters the air blowing hole 78 and is discharged. The guide ring 77 rectifies the airflow to ensure that it flows vertically upward and uniformly. The air blowing holes 78 are distributed in a ring array, which effectively ensures the uniformity and stability of the air pressure field, thereby providing a reliable airflow environment for the measurement of the air permeability of the test fabric 42.

[0038] The air permeability of fabric 42 is tested by detecting the pressure difference on both sides of it together by the first monitor 34 and the second monitor 82. This testing method is existing technology.

[0039] The multi-stage linkage mechanism driven by the pressure rod 31 includes a sleeve 32, a pressing tube 33, and a first extrusion ring 36. It evenly transmits the clamping force to the perforated plate 43 and the rubber ring 41. With the internal and external coordination of the pressing rib ring 44 and the pressing edge ring 45, the test fabric 42 is kept taut while avoiding local stretching distortion. At the same time, the rubber ring 41 is tightly fitted with the stretching mechanism 6 after being compressed, ensuring that a reliable seal is formed between the air chamber shell 76 and the fabric, fundamentally eliminating measurement errors caused by air leakage.

[0040] In addition, the airflow is rectified by the air blowing holes 78 distributed in a ring array, in conjunction with the guide ring 77 and the ring groove 79, so that the airflow penetrates the test fabric 42 vertically and uniformly, avoiding the turbulence or local impact caused by traditional single-point air intake. It is especially suitable for materials that are prone to vibration, such as ultra-light yarn and chiffon. Combined with the first monitor 34 and the second monitor 82, the pressure difference between the two sides of the fabric is monitored in real time.

[0041] Example 3: This example provides further technical solutions for the flow channel control mechanism 8, the stretching mechanism 6, and the binding mechanism 5.

[0042] The stretching mechanism 6 includes a cover 61, the inner wall of which is provided with an inner sealing ring 64, and the inner sealing ring 64 is mated and installed on the upper end of the sealing ring 85. The cover 61 covers the upper end of the mounting piece 81. The outer surface of the cover 61 is provided with a plurality of covering holes 63 arranged in a ring array, and the outer surface of the cover 61 is provided with a retaining ring groove 62.

[0043] The binding mechanism 5 includes a cover ring 54, a second compression ring 51 is provided at the lower end of the cover ring 54, a ring hoop 53 is sleeved on the outer surface of the second compression ring 51, and a number of friction blocks 52 arranged in a ring array are provided on the inner wall of the cover ring 54. The second compression ring 51 cooperates with the retaining ring groove 62 to clamp and stretch the test fabric 42.

[0044] It is worth noting that after the test fabric 42 is clamped and fixed by the perforated plate 43, the part of the fabric not covered by the perforated plate 43 is naturally covered on the outer surface of the cover 61. Then, the cover ring 54 is sleeved on the outside of the test fabric 42. When the cover ring 54 is pressed down, it drives the friction block 52 to slide downward along the axis. The friction block 52 relies on the friction between its surface and the test fabric 42 to apply a downward pulling force to the fabric, thereby forcibly stretching the test fabric 42, causing its pore structure to change nonlinearly with the degree of stretching.

[0045] As the cover ring 54 continues to move downward, the second compression ring 51, driven by the cover ring 54, works in conjunction with the friction block 52 to further stretch the test fabric 42 synchronously. When the second compression ring 51 moves into the retaining ring groove 62, the stretched test fabric 42 is flatly fixed and adheres to the surface of the cover 61. In addition, the ring 53 is sleeved on the outer periphery of the second compression ring 51 to enhance its fastening performance and ensure that the tensile state is stable and reliable.

[0046] The flow control mechanism 8 includes a mounting plate 81, an inner cover 83, and an outer cover 84. Both the inner cover 83 and the outer cover 84 are fixedly installed on the inner wall of the air duct 71. A sealing ring 85 is provided at the upper end of the inner cover 83. A second monitor 82 is provided on the inner wall of the inner cover 83. The outer cover 84 covers the outside of the air hole 72. The mounting plate 81 is fixedly installed on the outer surface of the outer cover 84.

[0047] During the testing of the test fabric 42, the suction head 74 draws air from between the outer cover 84 and the inner cover 83. At this time, the cover 61 covers the surface of the sealing ring 85, so that the cavity inside the cover 61 is connected to the annular cavity between the outer cover 84 and the inner cover 83. When the suction head 74 draws air through the air hole 72, the airflow passes through the cover hole 63 and simultaneously draws out the air below the area covered by the test fabric 42. By measuring the flow rate of the drawn gas and combining it with the air pressure difference inside and outside the cover 61, the air permeability of the test fabric 42 can be determined.

[0048] The controlled, uniform, and repeatable active stretching of the test fabric 42 is achieved through the synergistic action of the cover ring 54, friction block 52, and second compression ring 51. The fabric is pulled downward by friction and mechanically locked by the second compression ring 51 embedded in the retaining ring groove 62. This allows the fabric to be flat and adhered to the surface of the cover 61 in the stretched state, simulating the local deformation of clothing caused by limb movement during actual wear. At the same time, the ring 53 further enhances the locking reliability, ensuring that the stretched state does not loosen or slip during the test, thus truly reflecting the porosity change and breathability of the elastic fabric under dynamic strain.

[0049] Under this stretched state, a negative pressure suction detection mode is adopted. The suction head 74 draws the gas between the outer shell 84 and the inner shell 83 through the air hole 72. With the help of the connecting cavity formed by the cover 61 and the sealing ring 85, the airflow passes vertically through the cover hole 63 through the stretched test fabric 42, avoiding the fabric bulging or fluttering problems that are easily caused by positive pressure blowing. It is suitable for high-permeability and lightweight materials. By combining the measurement of flow rate and the air pressure difference inside and outside the cover, the air permeability data under deformation state can be accurately obtained.

[0050] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fabric breathability testing device for garment processing, comprising a housing (1), characterized in that: A pump (9) is provided at the bottom of the inner cavity of the casing (1), and a housing (10) is provided at the top of the pump (9). A wind control mechanism (7) for guiding the gas flow is provided at the bottom of the inner cavity of the housing (10), and a flow channel control mechanism (8) is provided on the outer surface of the wind control mechanism (7). The outer surface of the flow channel control mechanism (8) is provided with a stretching mechanism (6) for stretching the fabric and causing it to deform. The outer surface of the stretching mechanism (6) is provided with a sealing mechanism (4). The sealing mechanism (4) is used to constrain the fabric to perform air permeability testing under two different mechanical states. The outer surface of the sealing mechanism (4) is provided with a binding mechanism (5). The binding mechanism (5) works with the stretching mechanism (6) to constrain and deform the fabric. A control screen (2) is provided on one side of the upper end of the machine box (1). A pressing mechanism (3) is provided inside the control screen (2). The pressing mechanism (3) works with the sealing mechanism (4) to adjust and constrain the clamping state of the fabric.

2. The fabric breathability testing device for garment processing according to claim 1, characterized in that: The pressing mechanism (3) includes a pressure rod (31), one end of which is installed inside the control panel (2). One end of the pressure rod (31) is connected to a sleeve (32). A tablet compression tube (33) is slidably installed at the lower end of the sleeve (32), and a spring (35) is provided between the tablet compression tube (33) and the sleeve (32). A first monitor (34) is provided on the inner wall of the tablet compression tube (33), and a first compression ring (36) is provided at the lower end of the tablet compression tube (33).

3. The fabric breathability testing device for garment processing according to claim 1, characterized in that: The air control mechanism (7) includes an air duct (71), which is fixedly installed on the upper end of the outer shell (10). An air hole (72) is provided on the outer surface of the air duct (71). An air intake head (74) is provided inside the air duct (71), and one end of the air intake head (74) is installed inside the air hole (72). An air outlet pipe (75) communicating with the pump (9) is provided at the bottom of the air duct (71). An air chamber shell (76) is provided on the upper part of the inner wall of the air duct (71), and one end of the air outlet pipe (75) extends through the air chamber shell (76) into its interior.

4. The fabric breathability testing device for garment processing according to claim 3, characterized in that: The inner wall of the air cavity shell (76) is provided with a flow control plate (73), the upper end of the flow control plate (73) is provided with a flow guide ring (77), the lower end of the flow control plate (73) is provided with an annular groove (79), and the upper end of the annular groove (79) is provided with a plurality of vertically penetrating air holes (78).

5. The fabric breathability testing device for garment processing according to claim 1, characterized in that: The flow channel control mechanism (8) includes a mounting plate (81), an inner cover (83), and an outer cover (84). The inner cover (83) and the outer cover (84) are both fixedly installed on the inner wall of the air duct (71). A sealing ring (85) is provided at the upper end of the inner cover (83). A second monitor (82) is provided on the inner wall of the inner cover (83). The outer cover (84) covers the outside of the air hole (72). The mounting plate (81) is fixedly installed on the outer surface of the outer cover (84).

6. The fabric breathability testing device for garment processing according to claim 1, characterized in that: The stretching mechanism (6) includes a cover (61), the inner wall of which is provided with an inner sealing ring (64), and the inner sealing ring (64) is installed on the upper end of the sealing ring (85). The cover (61) covers the upper end of the mounting piece (81). The outer surface of the cover (61) is provided with a plurality of covering holes (63) arranged in a ring array. The outer surface of the cover (61) is provided with a retaining ring groove (62).

7. The fabric breathability testing device for garment processing according to claim 6, characterized in that: The sealing mechanism (4) includes a rubber ring (41) and a test fabric (42), the rubber ring (41) covering the upper end of the cover (61) and the test fabric (42) covering the outer surface of the cover (61).

8. A fabric breathability testing device for garment processing according to claim 7, characterized in that: The sealing mechanism (4) includes a perforated plate (43), and both ends of the upper end of the perforated plate (43) are provided with pressing rib rings (44). The outer surface of the perforated plate (43) is provided with a pressing edge ring (45) that cooperates with the rubber ring (41) to hold the test fabric (42).

9. A fabric breathability testing device for garment processing according to claim 6, characterized in that: The binding mechanism (5) includes a cover ring (54), and a second compression ring (51) is provided at the lower end of the cover ring (54). A ring hoop (53) is sleeved on the outer surface of the second compression ring (51). A number of friction blocks (52) arranged in a ring array are provided on the inner wall of the cover ring (54). The second compression ring (51) cooperates with the retaining ring groove (62) to clamp and stretch the test fabric (42).

10. A method for testing the air permeability of fabrics used in garment processing, employing the fabric air permeability testing device for garment processing as described in any one of claims 1-9, characterized in that, The specific ventilation testing method is as follows: Step 1: First, the fabric to be tested is installed on the upper part of the stretching mechanism (6) through the sealing mechanism (4). At this time, the fabric is in a naturally relaxed state. Then, the pressing mechanism (3) moves downward to apply pressure to the sealing mechanism (4), so that the sealing mechanism (4) and the stretching mechanism (6) work together to tension and clamp the fabric. Step 2: After the pressing mechanism (3) clamps the fabric inside the sealing mechanism (4), the binding mechanism (5) is activated to apply a controllable tensile force to the fabric and fix it to the outer surface of the stretching mechanism (6). At this time, the fabric clamped by the pressing mechanism (3) and the sealing mechanism (4) is in a tensile state, and the air permeability of the fabric in the tensile state is tested by the air control mechanism (7). Step 3: For the fabric stretched by the binding mechanism (5), its pore structure changes nonlinearly with the degree of stretching. The deformed fabric is stably fixed on the surface of the stretching mechanism (6). Then, the air permeability of the fabric in the extended deformation state is tested by the flow channel control mechanism (8) in conjunction with the stretching mechanism (6).

Images