Automatic detection equipment for air permeability of microporous air permeable membrane

Abstract

The application relates to a kind of micro-porous breathable film air permeability multi-point automatic detection equipment, including bottom plate and the horizontal moving device and water tank on both sides thereof, horizontal moving device connects membrane clamping mechanism, water tank is equipped with multiple air permeability detection components, including lower cylinder base, water injection cylinder, spring and guide rod, lower cylinder base is equipped with sealing ring and inflation hole, water injection cylinder inner wall is equipped with transparent water pipe, bottom plate side is equipped with pressing assembly and detection camera.The application clamps air permeable film sample by membrane clamping mechanism, horizontal moving device is moved to detection station, pressing assembly pushes water injection cylinder to press sample tightly, inflation after water injection, gas is exuded in water injection cylinder to form bubble from micropore, and detection camera takes a picture to judge air permeability.The application realizes multi-point synchronous automatic detection, and is high in efficiency, objective and accurate in result.

Description

Technical Field

[0001] This invention relates to the field of breathable membrane testing equipment, and more particularly to an automatic multi-point testing device for the breathability of microporous breathable membranes. Background Technology

[0002] Microporous breathable membranes are widely used in medical, electronics, and packaging fields, and their breathability is a key indicator for measuring product quality. Traditional breathability testing methods often employ single-point manual testing, which can only test one point at a time and requires manual observation of bubble formation. This is not only inefficient, but also highly susceptible to human factors, making it difficult to guarantee consistency and accuracy.

[0003] For large-area breathable membranes, the breathability performance may vary in different areas, and single-point testing cannot comprehensively reflect the overall breathability performance of the product. Furthermore, existing testing equipment has shortcomings in membrane clamping and sealing, easily leading to air leakage or incomplete sealing, affecting the reliability of the test results. Therefore, a multi-point automated testing device for the breathability of microporous breathable membranes is needed. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic multi-point detection device for the air permeability of microporous breathable membranes, thereby solving the above-mentioned problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a multi-point automatic detection device for the air permeability of a microporous breathable membrane, comprising a base plate, a transverse moving device and a water tank respectively arranged on both sides of the base plate, a membrane clamping mechanism fixedly connected to the moving end of the transverse moving device, and multiple air permeability detection components fixedly connected inside the water tank. Each air permeability detection component includes a lower cylinder seat, a water injection cylinder, a spring and a guide rod, the guide rod being fixedly connected to the lower cylinder seat, the water injection cylinder being slidably connected to the guide rod, the spring being located between the water injection cylinder and the lower cylinder seat, the lower cylinder seat being provided with a sealing ring and an air inlet, the inner wall of the water injection cylinder being provided with a water pipe, and a pressing component and a detection camera fixedly connected to the base plate next to the water tank, the pressing component including a pressing device and a pressing rod, and the water injection cylinder and water pipe being made of transparent material.

[0006] Furthermore, the diaphragm clamping mechanism includes a main slide, a positioning platform fixedly connected to both ends of the main slide, and a pressing cylinder. A pressure plate is fixedly connected to the piston rod of the pressing cylinder. A positioning groove is opened on the positioning platform, and a positioning column is fixedly connected in the positioning groove. The main slide is fixedly connected to the moving platform of the transverse movement device.

[0007] Furthermore, both the lateral movement device and the clamping device are cylinders.

[0008] Furthermore, the pressure plate is provided with a relief groove corresponding to the positioning post, and the pressure plate is provided with anti-slip texture on both sides of the relief groove.

[0009] Furthermore, the water injection cylinder and water pipe are made of acrylic, and a liquid level sensor is fixedly connected inside the water injection cylinder.

[0010] Furthermore, multiple air permeability detection components are linearly arranged inside the water tank, and there are multiple air inlets, which are distributed in a ring array on the lower cylinder seat.

[0011] Furthermore, the clamping device is fixedly connected to the base plate, and the pressure rod is fixedly connected to the moving end of the clamping device.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] By linearly arranging multiple air permeability testing components within the water tank, air permeability testing can be performed simultaneously at multiple points on the air permeable membrane sample. This method offers high testing efficiency and wide coverage, comprehensively reflecting the differences in air permeability performance across different areas of the membrane. A transverse movement device drives the membrane clamping mechanism to transfer the air permeable membrane sample to the testing station, achieving automatic feeding and positioning.

[0014] In the air permeability testing assembly, the pressing component pushes the water injection cylinder downwards along the guide rod, pressing the air permeable membrane sample tightly onto the sealing ring. The upper side of the air permeable membrane sample forms a sealed cavity with the water injection cylinder, and the lower side forms an inflatable sealed cavity with the lower cylinder seat. After water is injected into the water injection cylinder through the water pipe to the position of the liquid level sensor, air is injected into the inflatable sealed cavity through the air inlet. The gas seeps upwards from the micropores of the air permeable membrane, forming bubbles inside the water injection cylinder. The bubble formation is recorded by taking pictures with a detection camera to determine whether the air permeability is qualified. The test results are objective and accurate.

[0015] The spring between the water injection cylinder and the lower cylinder base provides a reset force after the test, causing the water injection cylinder to automatically rise and reset for the next test. The water injection cylinder and water pipe are made of transparent acrylic material, allowing the test camera to clearly capture the bubble generation process. The air inlets are arranged in a ring array on the lower cylinder base to ensure uniform inflation.

[0016] In the membrane clamping mechanism, the positioning groove and positioning post on the positioning stage precisely position the breathable membrane sample. The clamping cylinder drives the pressure plate to press the sample, preventing displacement during movement and testing. The clearance groove on the pressure plate cooperates with the positioning post, and the anti-slip texture increases the friction with the membrane, ensuring stable and reliable clamping. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the entire invention from a first-person perspective;

[0018] Figure 2 This is a schematic diagram of the entire invention from a second perspective;

[0019] Figure 3 This is a schematic diagram of the diaphragm clamping mechanism of the present invention;

[0020] Figure 4 This is an isometric schematic diagram of the air permeability detection component of the present invention.

[0021] Figure 5 This is a schematic diagram of the detection state of the air permeability detection component of the present invention.

[0022] In the diagram: 1. Base plate; 2. Lateral movement device; 3. Water tank; 4. Diaphragm clamping mechanism; 401. Main slide; 402. Positioning stage; 403. Pressing cylinder; 404. Pressing plate; 405. Positioning column; 5. Air permeability detection component; 501. Lower cylinder seat; 502. Water injection cylinder; 503. Spring; 504. Guide rod; 505. Sealing ring; 506. Inflation hole; 507. Water pipe; 6. Pressing component; 601. Pressing device; 602. Pressing rod; 7. Detection camera. 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] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] Example:

[0026] like Figures 1-5 As shown, the present invention proposes an automatic multi-point detection device for the air permeability of microporous breathable membranes, comprising a base plate 1, with a transverse movement device 2 and a water tank 3 respectively disposed on both sides of the base plate 1. The transverse movement device 2 is specifically a cylinder used to drive the membrane clamping mechanism 4 to move horizontally. Multiple air permeability detection components 5 are fixedly connected inside the water tank 3, and the multiple air permeability detection components 5 are linearly arranged inside the water tank 3, which can simultaneously detect the air permeability of multiple points on the breathable membrane sample.

[0027] The air permeability detection component 5 includes a lower cylinder seat 501, a water injection cylinder 502, a spring 503, and a guide rod 504. The guide rod 504 is fixedly connected to the lower cylinder seat 501, and the water injection cylinder 502 is slidably connected to the guide rod 504, allowing the water injection cylinder 502 to slide up and down along the guide rod 504. The spring 503 is located between the water injection cylinder 502 and the lower cylinder seat 501, providing a reset force to raise and reset the water injection cylinder 502 after detection. The lower cylinder seat 501 is equipped with a sealing ring 505 and multiple inflation holes 506 arranged in a ring array on the lower cylinder seat 501 to ensure uniform inflation. A water pipe 507 is installed on the inner wall of the water injection cylinder 502 for injecting water into it. The water injection cylinder 502 and the water pipe 507 are made of acrylic (a transparent material) for easy observation of bubble formation. A liquid level sensor is fixedly connected inside the water injection cylinder 502 to control the water injection volume to the set water level.

[0028] The membrane clamping mechanism 4 includes a main slide 401, positioning platforms 402 fixedly connected to both ends of the main slide 401, and a pressing cylinder 403. The main slide 401 is fixedly connected to the moving platform of the transverse movement device 2. The positioning platform 402 has a positioning groove, and a positioning post 405 is fixedly connected in the positioning groove for positioning the breathable membrane sample. A pressing plate 404 is fixedly connected to the piston rod of the pressing cylinder 403. The pressing plate 404 has a relief groove corresponding to the positioning post 405, and anti-slip textures are provided on both sides of the relief groove on the pressing plate 404 to increase the friction with the membrane.

[0029] A pressing assembly 6 and a detection camera 7 are fixedly connected to the base plate 1 next to the water tank 3. The pressing assembly 6 includes a clamping device 601 and a pressure rod 602. The clamping device 601 is fixedly connected to the base plate 1, and the pressure rod 602 is fixedly connected to the moving end of the clamping device 601. The clamping device 601 is specifically a cylinder that drives the pressure rod 602 to press down the water injection cylinder 502. Both the lateral movement device 2 and the clamping device 601 are cylinders.

[0030] The working principle of this invention is as follows:

[0031] During testing, the piston rod of the clamping cylinder 403 first extends, and the pressure plate 404 moves upward to make room for the placement of the breathable membrane sample (the breathable membrane sample is elongated, with through holes at both ends corresponding to the positioning posts 405). Next, the breathable membrane sample to be tested is placed on the positioning platform 402 along the positioning groove and positioning post 405, where the positioning post 405 precisely positions the sample. Then, the piston rod of the clamping cylinder 403 retracts, and the pressure plate 404 descends to press the breathable membrane sample firmly, with anti-slip textures preventing the membrane from sliding.

[0032] Next, the piston rod of the transverse moving device 2 extends, driving the main slide 401 to move to the testing position. At this time, the breathable membrane sample is located between the lower cylinder seat 501 and the water injection cylinder 502.

[0033] Then, the piston rod of the clamping device 601 extends, and the pressure rod 602 presses down on the water injection cylinder 502. The water injection cylinder 502 slides downward along the guide rod 504, pressing the air-permeable membrane sample onto the sealing ring 505. At this time, the upper side of the air-permeable membrane sample and the water injection cylinder 502 form a semi-closed water-sealed cavity, and the lower side of the air-permeable membrane sample and the lower cylinder seat 501 form an air-filled sealed cavity.

[0034] Next, water is injected into the water injection cylinder 502 through the water pipe 507 until the water level reaches the sensing position of the liquid level sensor, at which point the water injection stops. Subsequently, air is injected into the air-sealed cavity through the air-injection hole 506. During this process, the gas will seep upward from the micropores of the breathable membrane sample, forming bubbles in the water inside the water injection cylinder 502 and then being discharged.

[0035] After a period of time, the testing camera 7 takes pictures of the water injection cylinder 502, and judges whether the air permeability is qualified based on the generation of bubbles in the pictures. If bubbles are generated evenly and the amount of bubbles is within the qualified range, the air permeability is qualified; otherwise, the air permeability test is unqualified.

[0036] After the test is completed, the liquid in the water injection cylinder is extracted through the water pipe 507. Then, the piston rod of the clamping device 601 retracts, the pressure rod 602 rises to reset, and the water injection cylinder 502 rises to reset along the guide rod 504 under the elastic force of the spring 503, releasing the pressure on the breathable membrane sample. The transverse movement device 2 drives the membrane clamping mechanism 4 to return to its original position, and the operator can remove the tested breathable membrane sample for the next test.

[0037] In this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] The above embodiments are used to further illustrate the present invention, but do not limit the present invention to these specific embodiments. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be understood as falling within the protection scope of the present invention.

Claims

1. An automatic multi-point detection device for the air permeability of a microporous breathable membrane, characterized in that: The device includes a base plate (1), on both sides of which are respectively provided a transverse moving device (2) and a water tank (3). The moving end of the transverse moving device (2) is fixedly connected to a diaphragm clamping mechanism (4). Multiple air permeability detection components (5) are fixedly connected inside the water tank (3). Each air permeability detection component (5) includes a lower cylinder seat (501), a water injection cylinder (502), a spring (503), and a guide rod (504). The guide rod (504) is fixedly connected to the lower cylinder seat (501), and the water injection cylinder (502) slides against the guide rod (504). The spring (503) is located between the water injection cylinder (502) and the lower cylinder seat (501). The lower cylinder seat (501) is provided with a sealing ring (505) and an air inlet (506). The inner wall of the water injection cylinder (502) is provided with a water pipe (507). The pressure assembly (6) and the detection camera (7) are fixedly connected on the bottom plate (1) next to the water tank (3). The pressure assembly (6) includes a pressing device (601) and a pressure rod (602). The water injection cylinder (502) and the water pipe (507) are made of transparent material.

2. The automatic multi-point detection device for the air permeability of a microporous breathable membrane according to claim 1, characterized in that: The diaphragm clamping mechanism (4) includes a main slide (401), a positioning platform (402) fixedly connected to both ends of the main slide (401), and a pressing cylinder (403). A pressing plate (404) is fixedly connected to the piston rod of the pressing cylinder (403). A positioning groove is opened on the positioning platform (402), and a positioning column (405) is fixedly connected in the positioning groove. The main slide (401) is fixedly connected to the moving platform of the transverse moving device (2).

3. The automatic multi-point detection device for the air permeability of a microporous breathable membrane according to claim 1, characterized in that: Both the transverse movement device (2) and the clamping device (601) are cylinders.

4. The automatic multi-point detection device for the air permeability of a microporous breathable membrane according to claim 2, characterized in that: The pressure plate (404) is provided with a relief groove corresponding to the positioning post (405), and the pressure plate (404) is provided with anti-slip texture on both sides of the relief groove.

5. The automatic multi-point detection device for the air permeability of a microporous breathable membrane according to claim 1, characterized in that: The water injection cylinder (502) and water pipe (507) are made of acrylic, and a liquid level sensor is fixedly connected inside the water injection cylinder (502).

6. The automatic multi-point detection device for the air permeability of a microporous breathable membrane according to claim 1, characterized in that: Multiple air permeability detection components (5) are linearly arranged in the water tank (3), and there are multiple air inlets (506), which are arranged in a ring array on the lower cylinder seat (501).

7. The automatic multi-point detection device for the air permeability of a microporous breathable membrane according to claim 1, characterized in that: The pressing device (601) is fixedly connected to the base plate (1), and the pressing rod (602) is fixedly connected to the moving end of the pressing device (601).

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