Permeability detection machine for curtain fabric production

Abstract

The invention discloses a permeability detection machine for curtain fabric production, which comprises a rack, a clamping plate and a first cross beam are fixedly connected in the rack, a material clamping frame is slidably connected to the cross beam, a longitudinal slicking mechanism and a transverse flattening mechanism are arranged on the material clamping frame, a clamping mechanism is arranged on the first cross beam, the clamping mechanism comprises a clamping column, and the clamping column is provided with a clamping groove. The longitudinal slicking mechanism is used for being abutted against the surface of the fabric to tightly clamp the fabric on the clamping plate and simultaneously slicking the fabric downwards; the transverse flattening mechanism is used for abutting against the surface of the fabric, clamping the fabric on the clamping plate and flattening the fabric towards the two sides at the same time. The linear driving device is used for driving the material clamping frame to move, so that the first flattening rod automatically flattens the fabric downwards while clamping the fabric, meanwhile, the transverse flattening action is performed, automatic clamping and flattening operation on the fabric sample is realized, and the situation that the accuracy of a detection result is influenced by surface wrinkles of the fabric sample is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of air permeability detection equipment, and particularly relates to a permeability detector for curtain fabric production. Background Art

[0002] The permeability of a fabric generally refers to the ability of a gas (such as air, water vapor) or a liquid (such as water) to penetrate through the material. Permeability detection equipment is a key detection tool in the fields of materials science, packaging industry, textile manufacturing, and medical protection, etc., and is mainly used to quantitatively evaluate the gas or liquid permeability of fabric materials. In the production of curtain fabrics, waterproof permeability detection of curtain fabrics for different uses is required according to different application scenarios, providing a basis for material selection in design.

[0003] When the existing fabric permeability detection equipment detects, the fabric is placed on a rack, and water is sprayed on the fabric to detect the fabric permeability. For example, a textile rain permeability tester disclosed in Chinese Patent Publication No. CN104155228A in the prior art includes a spraying device, a control panel, a chassis, a waterproof splash cover, a specimen fixing device, and a water receiving box. The spraying device is provided at the top inside the chassis, the control panel is provided on one side of the top of the chassis, the specimen fixing device is provided at the bottom of the chassis, the water receiving box is provided below the specimen fixing device, and the waterproof splash cover is provided outside the specimen fixing device and the water receiving box. The control panel is electrically connected to the spraying device and the specimen fixing device respectively, and the spraying device, the specimen fixing device, and the water receiving box are in a straight line. It provides two detection methods for selection, improves the detection accuracy of the rain permeability of textiles, can make data detection for the rain permeability index of textiles, and provides a basis for improving the overall performance of textiles. However, in such disclosed devices, the test samples are clamped on the test clamping plates, and the detected fabric is prone to generate horizontal and vertical wrinkles, and water is likely to accumulate in the wrinkles. In the case of water accumulation in the wrinkles, the detection results of the same fabric are inconsistent, affecting the fabric determination results; and it is necessary to clamp the upper and lower ends of the fabric separately, and the operation is cumbersome. Summary of the Invention

[0004] The purpose of the present invention is to solve the above technical problems and provide a permeability detector for curtain fabric production.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions to be implemented:

[0006] A permeability detector for curtain fabric production, comprising a frame. Inside the frame, there are fixedly connected clamping plates and a first crossbeam. The clamping plates are arranged vertically, and the first crossbeam is located above the clamping plates. A material clamping frame is slidably connected to the crossbeam. A longitudinal leveling mechanism and a transverse flattening mechanism are arranged on the material clamping frame. A clamping mechanism is arranged on the first crossbeam. The clamping mechanism includes a clamping column. The lower end of the clamping column faces the upper edge of the clamping plate to clamp the upper edge of the fabric on the clamping plate. The longitudinal leveling mechanism is used to abut against the fabric surface to clamp the fabric on the clamping plate and simultaneously level the fabric downward. The transverse flattening mechanism is used to abut against the fabric surface to clamp the fabric on the clamping plate and simultaneously flatten the fabric to both sides. A water spray nozzle is installed on the material clamping frame, and the water spraying end of the water spray nozzle faces the clamping plate. A linear driving device is installed on the material clamping frame, and the driving end of the linear driving device is fixedly connected to the material clamping frame to drive the material clamping frame to move towards the direction close to the clamping plate. Specifically, the linear driving device adopts one of a hydraulic cylinder, a pneumatic cylinder or an electric push rod. The water spray nozzle is connected to an external water source to provide the water spraying water source required for detection.

[0007] Further, the longitudinal leveling mechanism includes a first flattening rod hinged on the material clamping frame. The first flattening rod swings up and down around the hinge point with the material clamping frame, and the end of the first flattening rod far from the material clamping frame is inclined downward. A first spring is arranged between the first flattening rod and the material clamping frame. The first spring provides an elastic force to keep the first flattening rod close to the clamping plate and makes the first flattening rod swing upward to reset when it disengages from the clamping plate. A leveling rod is arranged at the end of the first flattening rod far from the material clamping frame. The leveling rod is arranged horizontally, and bristles are arranged on the leveling rod. The bristles are used to fit and move on the surface of the fabric sample to smooth the fabric sample.

[0008] Further, the lower end of the first flattening rod is set as a circular end head, and the circular end head is used to abut against the position close to the two side edges of the fabric sample and slide along the surface of the fabric sample.

[0009] Further, the transverse flattening mechanism includes a connecting rod fixed on the material clamping frame. A second flattening rod is hinged to the connecting rod. The end of the second flattening rod abuts against the clamping plate. A second spring is arranged between the second flattening rod and the connecting rod. The second spring provides an elastic force to make the end of the second flattening rod far from the connecting rod keep abutting against the clamping plate while clamping the fabric.

[0010] Further, a first rack is fixedly connected to the material clamping frame, a first gear is rotatably connected to the first cross beam, the first gear meshes with the first rack on the material clamping frame, a second rack is arranged on the first cross beam, the second rack is vertically arranged and is in vertical sliding fit with the first cross beam, the second rack meshes with the first gear to form a gear-rack drive, a sleeve is fixedly connected to the lower end of the second rack, the upper end of the clamping column is inserted into the sleeve, and a third spring is arranged in the sleeve, and the third spring abuts against the upper end of the clamping column.

[0011] Further, a hanging nail is fixedly connected to the upper end of the clamping plate, the hanging nail is used for hanging a fabric sample, and the hanging nail is located on the side of the clamping column away from the material clamping frame.

[0012] Further, a water collecting tank is arranged in the machine frame, the water collecting tank is located below the clamping plate, the water collecting tank is internally provided with a containing cavity for containing water and the upper end of the water collecting tank is of an open structure, and a drain pipe is connected to the bottom of the water collecting tank.

[0013] Further, an observation notch is formed in the middle of the clamping plate, and a transparent plate is arranged in the observation notch. Specifically, the transparent plate is a transparent glass plate or an acrylic plate.

[0014] Further, an industrial camera is arranged in the machine frame, the industrial camera is located on the side of the clamping plate away from the longitudinal leveling mechanism, and the imaging end of the industrial camera faces the middle of the clamping plate.

[0015] Further, a limiting block is fixedly connected in the machine frame, and the limiting block is located between the clamping plate and the material clamping frame.

[0016] A permeability detector for curtain fabric production provided by the present invention has the following beneficial effects: the test fabric is placed through the clamping plate, and the transverse leveling mechanism and the longitudinal leveling mechanism act on the fabric together, clamping the fabric on the clamping plate and tightening and smoothing the fabric at the same time, so as to avoid wrinkles on the surface of the test fabric sample during testing; the permeability of the fabric on the clamping plate is detected by spraying water through a water spraying nozzle; the material clamping frame is driven to move by a linear driving device, so that while the first flattening rod clamps the fabric, the fabric is automatically smoothed downward, and the second flattening rod is automatically driven to perform a transverse flattening action at the same time, realizing the automatic clamping and smoothing operations of the fabric sample, and avoiding the influence of wrinkles on the surface of the fabric sample on the accuracy of the detection result. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following further describes in detail the specific embodiments of the present invention with reference to the drawings:

[0018] Figure 1Schematic diagram of the structure of a permeability detector for curtain fabric production provided by the present invention in the state where the fabric is flattened;

[0019] Figure 2 For Figure 1 Partial structure schematic diagram of part A in [the figure];

[0020] Figure 3 For Figure 1 Partial structure schematic diagram of part B in [the figure];

[0021] Figure 4 Partial top view schematic diagram of the longitudinal flattening mechanism part in a permeability detector for curtain fabric production provided by the present invention;

[0022] Figure 5 Partial top view schematic diagram of the transverse flattening mechanism part in a permeability detector for curtain fabric production provided by the present invention;

[0023] Figure 6 Side view structure schematic diagram of the clamping plate in a permeability detector for curtain fabric production provided by the present invention;

[0024] Figure 7 Schematic diagram of the structure of a permeability detector for curtain fabric production provided by the present invention in the state where the fabric is not flattened.

[0025] Explanation of the reference numerals in the figure: 1, frame; 11, water collecting tank; 12, drain pipe; 13, industrial camera; 14, limit block; 2, clamping plate; 21, hanging nail; 22, transparent plate; 3, first cross beam; 4, material clamping frame; 41, water spraying nozzle; 5, longitudinal flattening mechanism; 51, first flattening rod; 52, first spring; 53, flattening rod; 54, brush hair; 55, circular end; 6, transverse flattening mechanism; 61, connecting rod; 62, second flattening rod; 63, second spring; 7, clamping mechanism; 71, clamping column; 72, first rack; 73, first gear; 74, second rack; 75, sleeve; 76, third spring; 8, linear driving device; 9, fabric. Detailed implementation manners

[0026] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0028] It should be noted that all the directional indicators (such as up-down-left-right-front-back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the attached drawings). If this specific posture changes, the directional indicators will also change accordingly. The connection mentioned above can be a direct connection or an indirect connection.

[0029] As Figures 1-7 shown, a permeability detector for curtain fabric production includes a frame 1. Inside the frame 1, a clamping plate 2 and a first cross beam 3 are fixedly connected. The clamping plate 2 is arranged vertically, and the first cross beam 3 is located above the clamping plate 2. A material clamping frame 4 is slidably connected to the cross beam. A longitudinal flattening mechanism 5 and a transverse flattening mechanism 6 are arranged on the material clamping frame 4. A clamping mechanism 7 is arranged on the first cross beam 3. The clamping mechanism 7 includes a clamping column 71. The lower end of the clamping column 71 faces the upper edge of the clamping plate 2 to clamp the upper edge of the fabric 9 on the clamping plate 2. The longitudinal flattening mechanism 5 is used to abut against the surface of the fabric 9 to clamp the fabric 9 on the clamping plate 2 and flatten the fabric downward at the same time. The transverse flattening mechanism 6 is used to abut against the surface of the fabric 9 to clamp the fabric 9 on the clamping plate 2 and flatten the fabric 9 to both sides at the same time. A water spray nozzle 41 is installed on the material clamping frame 4. The water spraying end of the water spray nozzle 41 faces the clamping plate 2. A linear driving device 8 is installed on the material clamping frame 4. The driving end of the linear driving device 8 is fixedly connected to the material clamping frame 4 to drive the material clamping frame 4 to move towards the direction close to the clamping plate 2. Specifically, the linear driving device 8 adopts one of a hydraulic cylinder, a pneumatic cylinder or an electric push rod. The water spray nozzle 41 is connected to an external water source to provide the water spraying water source required for detection.

[0030] Adopting the above technical solution, the detection fabric is placed by the clamping plate 2, and the transverse flattening mechanism and the longitudinal flattening mechanism 5 act on the fabric 9 together to clamp and tighten and flatten the fabric 9 on the clamping plate 2, so as to avoid the generation of wrinkles on the surface of the detection fabric 9 sample during the test. The water spray nozzle 41 sprays water on the fabric 9 on the clamping plate 2 to detect the permeability of the fabric 9.

[0031] Specifically, the longitudinal leveling mechanism 5 includes a first leveling rod 51 hinged to the material clamping frame 4. The first leveling rod 51 swings up and down around the hinge point with the material clamping frame 4, and the end of the first leveling rod 51 away from the material clamping frame 4 is inclined downward so that it automatically swings downward when pressing against the fabric. A first spring 52 is arranged between the first leveling rod 51 and the material clamping frame 4. The first spring 52 provides elastic force to keep the first leveling rod 51 close to the clamping plate 2 and makes the first leveling rod 51 swing upward to reset when it disengages from the clamping plate 2. A leveling rod 53 is arranged at the end of the first leveling rod 51 away from the material clamping frame 4. The leveling rod 53 is horizontally arranged, and bristles 54 are arranged on the leveling rod 53. The bristles 54 are used to move along the surface of the fabric sample to smooth the fabric sample. During use, the linear driving device 8 drives the material clamping frame 4 to move towards the clamping plate 2, so that the leveling rod 53 abuts against the fabric sample on the clamping plate 2. The first spring 52 provides elastic force to make the leveling rod 53 close to the fabric surface. The material clamping frame 4 continues to move towards the clamping plate 2, so that the first leveling rod 51 swings around the hinge point, making the leveling rod 53 move downward along the fabric surface. During the downward movement of the leveling rod 53, the bristles 54 are driven to move downward, and the fabric is smoothed by the friction force of the bristles 54.

[0032] Specifically, the lower end of the first leveling rod 51 is provided with a round end 55. The round end 55 is used to abut against the positions near the two side edges of the fabric sample and slide along the surface of the fabric sample. By sliding the round end 55 along the fabric surface, while leveling the fabric downward, the damage to the fabric is reduced, unnecessary pulling or tearing will not occur, and the integrity of the fabric is maintained.

[0033] Specifically, the horizontal flattening mechanism 6 includes a connecting rod 61 fixed to the material clamping frame 4. A second flattening rod 62 is hingedly connected to the connecting rod 61. The end of the second flattening rod 62 abuts against the clamping plate 2. A second spring 63 is arranged between the second flattening rod 62 and the connecting rod 61. The second spring 63 provides an elastic force so that the end of the second flattening rod 62 away from the connecting rod 61 remains in contact with the clamping plate 2 while clamping the fabric. During use, the linear driving device 8 drives the material clamping frame 4 to move towards the clamping plate 2, driving the second flattening rod 62 to move to the surface of the fabric sample in contact with the clamping plate 2. The material clamping frame 4 continues to move towards the clamping plate 2, and the end of the second flattening rod 62 away from the connecting rod 61 turns outwards. And the second flattening rod 62 is pressed against the fabric surface under the action of the second spring 63, so that the second flattening rod 62 flattens the fabric to both sides; the outward turning action of the second flattening rod 62 effectively avoids the generation of wrinkles at the edge of the fabric, ensuring the flatness of the fabric sample during the detection process; by adjusting the spring force on the second flattening rod 62, fabrics of different thicknesses and materials can be adapted to achieve the best flattening effect. Through the above structure, the linear driving device 8 drives the material clamping frame 4 to move, so that while the first flattening rod 51 clamps the fabric, the fabric is automatically smoothed downwards, and the second flattening rod 62 is automatically driven to perform a horizontal flattening action at the same time, realizing the automatic clamping and smoothing operations of the fabric sample, and avoiding the influence of wrinkles on the surface of the fabric sample on the accuracy of the detection result.

[0034] Specifically, a first rack 72 is fixedly connected to the material clamping frame 4. A first gear 73 is rotatably connected to the first cross beam 3. The first gear 73 meshes with the first rack 72 on the material clamping frame 4. A second rack 74 is arranged on the first cross beam 3. The second rack 74 is vertically arranged and is in sliding fit with the first cross beam 3 up and down. The second rack 74 meshes with the first gear 73 to form a gear-rack transmission. The lower end of the second rack 74 is fixedly connected with a sleeve 75. The upper end of the clamping column 71 is inserted into the sleeve 75, and a third spring 76 is arranged in the sleeve 75. The third spring 76 abuts against the upper end of the clamping column 71. When the linear driving device 8 pushes the material clamping frame 4 to move, it synchronously and automatically drives the first rack 72 to move, and then drives the first gear 73 to rotate accordingly, ensuring the smooth movement of the material clamping frame 4; and when the linear driving device 8 pushes the material clamping frame 4 to move to drive the first rack 72 to move and then drives the first gear 73 to rotate, the second rack 74 also rotates accordingly, so that the sleeve 75 and the clamping column 71 move downwards synchronously, so that the lower end of the clamping column 71 abuts against the edge of the fabric at the upper end of the clamping plate 2, and the third spring 76 is compressed accordingly, providing a pressure to ensure that the clamping column 71 stably presses the fabric sample and prevents slippage during the detection process, ensuring the flatness of the fabric sample during the detection process.

[0035] Specifically, a hanging nail 21 is fixedly connected to the upper end of the clamping plate 2. The hanging nail 21 is used for hanging fabric samples. The hanging nail 21 is located on the side of the clamping column 71 away from the material clamping frame 4, so that the hanging nail 21 is staggered from the clamping column 71, and the upper edge of the fabric can be clamped on the upper end of the clamping plate 2 when the clamping column 71 moves downward. During use, the upper edge of the test fabric is hung on the hanging nail 21, and the hanging nail 21 passes through the fabric to initially place the test fabric, facilitating the initial positioning of the test fabric; then, the linear driving device 8 is used to drive the material clamping frame 4 to move, thereby clamping and leveling the fabric.

[0036] Specifically, a water collecting tank 11 is arranged in the frame 1. The water collecting tank 11 is located below the clamping plate 2. The water collecting tank 11 is provided with a receiving cavity for holding water and the upper end of the water collecting tank 11 is of an open structure. A drain pipe 12 is connected to the bottom of the water collecting tank 11. The water collecting tank 11 is provided to collect the water that falls after spraying onto the sample surface and discharge it through the drain pipe 12; collecting and discharging the excess water helps to maintain a dry environment inside the device.

[0037] Specifically, an observation notch is formed in the middle of the clamping plate 2, and a transparent plate 22 is arranged in the observation notch. Specifically, the transparent plate 22 is a transparent glass plate or acrylic plate. The transparent plate 22 in the observation notch allows light to penetrate, facilitating the operator to observe the state of the fabric sample during the detection process and timely adjust the clamping and smoothing forces.

[0038] Specifically, an industrial camera 13 is arranged in the frame 1. The industrial camera 13 is located on the side of the clamping plate 2 away from the longitudinal leveling mechanism 5, and the imaging end of the industrial camera 13 faces the middle of the clamping plate 2. The industrial camera 13 is used to capture images of the fabric sample in real time. After water penetrates into the fabric, the color of the fabric will become darker. By analyzing the fabric sample image, the area of the fabric penetrated by water can be obtained, accurately judging the permeability of the fabric. The larger the area of the fabric penetrated by water, the larger the permeability index and the poorer the waterproofness of the material. The smaller the area of the fabric penetrated by water, the better the waterproofness. With the assistance of the industrial camera 13 for detection, the accuracy of the test results is ensured, and the efficiency and accuracy of fabric performance evaluation are improved.

[0039] Specifically, a limiting block 14 is fixedly connected in the frame 1. The limiting block 14 is located between the clamping plate 2 and the material clamping frame 4. The movement distance of the material clamping frame 4 is restricted by the limiting block 14 to prevent mechanical damage caused by excessive movement of the material clamping frame 4; and the setting of the limiting block 14 ensures that the material clamping frame 4 stops at the same position, thereby guaranteeing the consistency of the detection.

[0040] The working principle of a permeability detector for curtain fabric production provided by the present invention is as follows: When in use, hang the fabric 9 sample on the hanging nail 21 so that the fabric 9 sample covers the transparent plate 22 on the side of the clamping plate 2. Drive the clamping frame 4 to move towards the clamping plate 2 through the linear driving device 8. During the process of the clamping frame 4 moving towards the clamping plate 2, the clamping column 71 gradually moves downward, clamping the upper edge of the fabric 9 sample at the upper end of the clamping plate 2. At the same time, the first flattening rod 51 approaches the fabric to clamp the fabric 9. As the clamping frame 4 continues to move towards the clamping plate 2, under the reaction force of the first flattening rod 51 pressing on the fabric 9 sample, the first flattening rod 51 rotates, and the lower end of the first flattening rod 51 moves downward, driving the scraping rod 53 to drive the bristles 54 to move downward, and flattening the fabric through the bristles 54. When the scraping rod 53 moves downward to below the second flattening rod 62, the second flattening rod 62 approaches the fabric sample and abuts against the fabric surface, clamping the fabric 9 on the clamping plate 2. When the clamping frame 4 continues to move towards the clamping plate 2, the second flattening rod 62 rotates outward, causing the fabric 9 sample to be flattened and clamped on the clamping plate 2 on both sides, thereby keeping the surface of the fabric 9 flat. After the clamping frame 4 moves to the set position, the spraying system of the device is started, and the water spray nozzle 41 evenly sprays a specific amount of water on the surface of the fabric sample to simulate the impact of rain on the material. After the spraying system stops, the excess water is collected through the water collecting tank 11 and discharged through the drain pipe 12. At this time, the industrial camera 13 starts to work, captures the image of the fabric 9 sample in the wet state after spraying water, and analyzes the water penetration effect. When analyzing the image of the fabric 9 sample, the industrial camera 13 automatically identifies the area of the fabric 9 penetrated by water through software processing and calculates the area of the penetration area, thereby giving an accurate permeability index.

[0041] For the parts not involved in this technical solution, the prior art can be adopted for implementation.

[0042] The above shows and describes the basic principles, main features and characteristics of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed includes the appended claims and their equivalents.

Claims

1. A permeability testing machine for curtain fabric production, characterized by: The invention comprises a frame (1), wherein a clamping plate (2) and a first crossbeam (3) are fixedly connected inside the frame (1), wherein the clamping plate (2) is arranged vertically, and the first crossbeam (3) is located above the clamping plate (2), and a material clamping frame (4) is slidably connected to the crossbeam, and the material clamping frame (4) is provided with a longitudinal scraping mechanism (5) and a transverse flattening mechanism (6), and the first crossbeam (3) is provided with a clamping mechanism (7), and the clamping mechanism (7) comprises a clamping column (71), and the lower end of the clamping column (71) faces the upper edge of the clamping plate (2) and is used to clamp the upper edge of the fabric on the clamping plate (2). The longitudinal flattening mechanism (5) is used to contact the surface of the fabric to clamp the fabric on the clamping plate (2) and scrape the fabric downward; the transverse flattening mechanism (6) is used to contact the surface of the fabric to clamp the fabric on the clamping plate (2) and flatten the fabric to both sides. A water spray nozzle (41) is installed on the material clamping frame (4), and the water spray end of the water spray nozzle (41) is facing the clamping plate (2); a linear drive device (8) is installed on the material clamping frame (4), and the drive end of the linear drive device (8) is fixedly connected to the material clamping frame (4) to drive the material clamping frame (4) to move in a direction close to the clamping plate (2).

2. The permeability testing machine for curtain fabric production according to claim 1 is characterized by: The longitudinal leveling mechanism (5) comprises a first leveling rod (51) hinged on the clamping frame (4), the first leveling rod (51) swings up and down around the hinge point with the clamping frame (4), and the end of the first leveling rod (51) away from the clamping frame (4) is tilted downward, a first spring (52) is arranged between the first leveling rod (51) and the clamping frame (4), the first spring (52) provides elastic force to keep the first leveling rod (51) close to the clamping plate (2) and to swing the first leveling rod (51) upward to reset when leaving the clamping plate (2), a leveling rod (53) is arranged at the end of the first leveling rod (51) away from the clamping frame (4), the leveling rod (53) is arranged horizontally, and bristles (54) are arranged on the leveling rod (53), and the bristles (54) are used to move in contact with the surface of the fabric sample to smooth the fabric sample.

3. The permeability testing machine for curtain fabric production according to claim 2 is characterized by: The lower end of the first flattening rod (51) is arranged as a circular end head (55), and the circular end head (55) is used to abut against the edges of the fabric sample on both sides and slide along the surface of the fabric sample.

4. The permeability testing machine for curtain fabric production according to claim 2 is characterized by: The transverse flattening mechanism (6) comprises a connecting rod (61) fixed on the material clamping frame (4), a second flattening rod (62) being hingedly connected to the connecting rod (61), an end of the second flattening rod (62) abutting against the clamping plate (2), a second spring (63) being arranged between the second flattening rod (62) and the connecting rod (61), the second spring (63) providing elastic force so that the end of the second flattening rod (62) away from the connecting rod (61) remains abutting against the clamping plate (2) while clamping the fabric.

5. The permeability testing machine for curtain fabric production according to claim 2 is characterized by: A first rack (72) is fixedly connected to the clamping frame (4), and a first gear (73) is rotatably connected to the first crossbeam (3). The first gear (73) meshes with the first rack (72) on the clamping frame (4). A second rack (74) is provided on the first crossbeam (3). The second rack (74) is vertically arranged and slidably cooperates with the first crossbeam (3) up and down. The second rack (74) meshes with the first gear (73) to form a gear-rack transmission. A sleeve (75) is fixedly connected to the lower end of the second rack (74). The upper end of the clamping column (71) is inserted into the sleeve (75), and a third spring (76) is provided in the sleeve (75). The third spring (76) abuts against the upper end of the clamping column (71).

6. The permeability testing machine for curtain fabric production according to claim 2 is characterized by: The upper end of the clamping plate (2) is fixedly connected with a hanging nail (21), and the hanging nail (21) is used to hang the fabric sample. The hanging nail (21) is located on the side of the clamping column (71) away from the clamping frame (4).

7. The permeability testing machine for curtain fabric production according to claim 2 is characterized by: A water collecting trough (11) is provided in the frame (1), the water collecting trough (11) is located below the clamping plate (2), a receiving cavity for receiving water is provided in the water collecting trough (11), the upper end of the water collecting trough (11) is an open structure, and the bottom of the water collecting trough (11) is connected to a drainage pipe (12).

8. The permeability testing machine for curtain fabric production according to claim 2 is characterized by: An observation notch is provided in the middle of the clamping plate (2), and a transparent plate (22) is arranged in the observation notch.

9. The permeability testing machine for curtain fabric production according to claim 8, characterized in that: An industrial camera (13) is arranged in the frame (1), and the industrial camera (13) is located on a side of the clamping plate (2) away from the longitudinal scraping mechanism (5), and the camera end of the industrial camera (13) faces the middle of the clamping plate (2).

10. The permeability testing machine for curtain fabric production according to claim 2, characterized in that: A limit block (14) is fixedly connected inside the frame (1), and the limit block (14) is located between the clamping plate (2) and the material clamping frame (4).

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