A mask non-woven fabric air permeability detection device

Abstract

The present invention relates to the technical field of non-woven fabric performance detection, and specifically provides a breathability detection device for facial mask non-woven fabric; it includes a detection machine body for detecting the breathability of the non-woven fabric and a relaxation feeding machine configured in a supporting manner with the detection machine body; the relaxation feeding machine includes a transfer platform, an elastic support seat assembled on the transfer platform, a flipping mechanism assembled on the elastic support seat, and a relaxation mechanism assembled on the flipping mechanism. The relaxation mechanism is assembled on the flipping frame and includes a clamping assembly and a relaxation actuator; the non-woven fabric to be detected is clamped by the clamping assembly. When the relaxation actuator moves vertically downward, the relaxation actuator generates a vertically downward pre-tensioning force on the non-woven fabric and levels both sides of the non-woven fabric; the device provided by the present invention improves the testing efficiency, ensures the repeatability of multiple detections, reduces random operation errors, and improves the testing accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of non-woven fabric performance detection, and specifically provides a device for detecting the air permeability of facial mask non-woven fabric. Background Art

[0002] Facial mask non-woven fabric is a material commonly used in making facial masks. Non-woven fabric, that is, non-woven cloth, is different from traditional woven fabrics and is a kind of fabric directly made from fibers by physical, chemical or thermal methods. When non-woven fabric is used in facial mask products, it mainly utilizes the characteristics of good air permeability, softness and fit of non-woven fabric, which can effectively carry and transfer essence to the skin. In addition, non-woven fabric also has good water absorption and moisture retention properties, which can improve the use effect of facial masks.

[0003] In the production process of facial mask non-woven fabric, in order to ensure that each batch of non-woven fabric can meet the air permeability requirements of facial mask non-woven fabric, it is necessary to detect the air permeability of facial mask non-woven fabric to verify whether the requirements are met. In the prior art, a professional air permeability detection device is often used to detect the air permeability of non-woven fabric. In the actual detection process, the two sides of the non-woven fabric are pressed tightly by specially arranged upper and lower pressure plates. The device automatically forms a pressure difference on the upper and lower sides of the non-woven fabric. Usually, the lower part of the non-woven fabric is a low-pressure area. Therefore, under the pressure difference, air automatically passes through the non-woven fabric from above to below to verify the air permeability of the material.

[0004] In the existing detection operation process, usually, the test sample material is directly placed and clamped between the upper and lower pressure plates by hand. The facial mask non-woven fabric itself is thin and soft, and when manually placing and clamping the non-woven fabric test sample, there is a large degree of randomness, and it is easy to operate non-standardly, resulting in the test sample not being fully spread out flat, and there are problems such as local wrinkles, folds or slack in the test sample material, thus reducing the effective test area of the test sample and changing the pore structure. During actual detection, multiple test samples need to be repeatedly detected. The non-standard and non-uniform operation of manual labor increases the random error of repeated detection, thus affecting the repeatability of detection. Summary of the Invention

[0005] In order to solve the above problems, the present invention provides a device for detecting the air permeability of facial mask non-woven fabric to solve the problems mentioned in the above background art.

[0006] To achieve the above object, the present invention adopts the following technical solutions: A mask non-woven fabric air permeability detection device, including a detection machine body for detecting the air permeability of the non-woven fabric and a relaxation feeding machine configured with the detection machine body; a fixture assembly including an upper pressing part and a lower pressing part and clamping the two sides of the non-woven fabric is provided on the detection machine body; the relaxation feeding machine includes: a transfer platform assembled on the table surface of the detection machine body; an elastic support seat assembled on the mobile end surface of the moving platform for realizing passive lifting; a flipping mechanism including a flipping frame horizontally hinged on the top end surface of the elastic support seat, the flipping frame flipping between two position states of horizontal and vertical; and a relaxation mechanism assembled on the flipping frame, the relaxation mechanism including a clamping component and a relaxation actuator; when the flipping frame flips to the vertical state, the clamping component is located above the relaxation actuator, and the relaxation actuator is vertically movable on the flipping frame, the non-woven fabric to be detected is clamped by the clamping component, and when the relaxation actuator moves vertically downward, the relaxation actuator generates a vertically downward pre-tensioning force on the non-woven fabric and levels the two sides of the non-woven fabric.

[0007] After the non-woven fabric is relaxed by the relaxation mechanism, the flipping frame flips to the horizontal state, and the non-woven fabric is transferred between the upper pressing part and the lower pressing part through the transfer platform. During the downward pressing of the upper pressing part, the upper pressing part touches and presses the flipping frame, causing the elastic support seat to passively descend, and the non-woven fabric is accordingly pressed tightly between the upper pressing part and the lower pressing part.

[0008] Preferably, the clamping component and the relaxation actuator are arranged in a linkage clamping manner. When the clamping component clamps the non-woven fabric, the relaxation actuator synchronously clamps the non-woven fabric, and when the clamping component loosens, the relaxation actuator synchronously loosens.

[0009] Preferably, the clamping component includes: two clamping bars slidably mounted opposite to each other on the flipping frame for clamping the two sides of the non-woven fabric; two rows of clamping springs respectively assembled on the two clamping bars, and one end of the clamping spring is fixedly connected to the side end surface of the clamping bar facing away from the clamping end; and two connecting plates both fixed on the flipping frame and correspondingly cooperating with the two rows of clamping springs, and the other end of the clamping spring is fixedly connected to the connecting plate cooperating with it.

[0010] Preferably, the clamping assembly further includes four synchronous guide frames, and two synchronous guide frames are respectively and fixedly connected to each of the two clamping bars. The synchronous guide frames are slidably installed on the flipping frame in the same direction as the clamping bars; the relaxation actuator includes: two sliders, which are oppositely arranged and slidably installed on the flipping frame. When the flipping frame is in a vertical state, the sliders slide in the vertical direction; two groups of roller seats, which are correspondingly arranged on the two sliders one by one; one group of roller seats located on the slider includes two, and the two roller seats are slidably installed on the slider relatively, and the roller seats are slidably arranged in the same direction as the synchronous guide frames; two of the roller seats located in the relative positions in the two groups of roller seats are slidably installed on the two synchronous guide frames on the same clamping bar one by one, and the sliding direction of the roller seats along the synchronous guide frames is the same as the sliding direction of the sliders; and two rollers, which are used for flexibly clamping and contacting both sides of the non-woven fabric; the rollers are horizontally rotatably installed between the two roller seats located in the relative positions in the two groups of roller seats.

[0011] Preferably, the flipping frame includes: a window plate; and two guide rail beams, which are correspondingly fixed at both ends of the window plate so that the flipping frame has a U-shaped frame structure; the flipping frame is horizontally rotatably installed on the top end surface of the elastic support seat through the two guide rail beams; the two clamping bars are slidably installed on the window plate relatively, and the two clamping bars are located inside the frame of the flipping frame. A window for the non-woven fabric to pass through is provided on the window plate between the two clamping bars relatively; the two connecting plates are both fixed on the window plate; the two sliders are slidably installed on the two guide rail beams one by one, and the two synchronous guide frames on the same group of roller seats are slidably installed on the adjacent guide rail beams.

[0012] Preferably, a bearing plate is fixed on at least one of the guide rail beams. When the flipping frame is in a horizontal state, the bearing plate is located at the top end of the guide rail beam; a touch plate corresponding to the bearing plate for pressing contact is provided on the upper pressing part.

[0013] Preferably, the elastic support seat includes: a plurality of guide posts, which are all vertically fixed on the mobile end surface of the transfer platform.

[0014] A support base, which is vertically slidably installed on the plurality of guide posts; the guide rail beam is hinged on the upper end surface of the support base.

[0015] A plurality of support springs, which are sleeved on the plurality of guide posts one by one, and the two ends are respectively fixed on the mobile end surface of the transfer platform and the bottom end surface of the support base.

[0016] Preferably, the flipping mechanism further includes at least one flipping drive part installed on one of the guide rail beams in a matching manner; the flipping drive part includes a flipping cylinder hinged on the upper end surface of the support base and a connecting block fixed on the guide rail beam, and the output end of the flipping cylinder is hinged on the connecting block.

[0017] Preferably, side push rods are fixed to the same side ends of the two clamping bars, and the two side push rods penetrate through the adjacent guide beams to the outside.

[0018] The above technical solution has the following advantages or beneficial effects: The present invention provides a mask non-woven fabric air permeability detection device. On the basis of the existing air permeability detection device, a relaxation feeding machine is provided. Through the relaxation feeding machine, the non-woven fabric sample can be subjected to material surface leveling and pre-tensioning treatment within a reasonable tension range in the vertical state, and in the horizontal state, it can automatically send the non-woven fabric to the detection end of the existing detection device for testing and automatically lay it flat. This solves the problem that the existing detection device needs to manually place the test sample flat, resulting in non-standard and inconsistent operations. As a result, the test sample is not fully laid flat and opened, with problems such as local wrinkles, folds or slack, which in turn reduces the effective test area of the test sample and changes the pore structure, ultimately affecting the test accuracy and test results. When performing multiple simple repeated tests, the test efficiency is improved, the repeatability of multiple detections is ensured, the random operation error is reduced, and the test accuracy is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, the present invention and its features, shapes and advantages will become more obvious. The same reference numerals indicate the same parts in all the drawings. The drawings are not deliberately drawn to scale, and the focus is on showing the gist of the present invention.

[0020] Figure 1 is a three-dimensional structural diagram of a mask non-woven fabric air permeability detection device provided by the present invention.

[0021] Figure 2 is a front view of a mask non-woven fabric air permeability detection device provided by the present invention.

[0022] Figure 3 is a three-dimensional structural diagram of the detection machine body.

[0023] Figure 4 is Figure 3 a partial enlarged view of part A in

[0024] Figure 5 is a three-dimensional structural diagram of the relaxation feeding machine.

[0025] Figure 6 is a top view of the relaxation feeding machine.

[0026] Figure 7 is a three-dimensional structural diagram of the elastic support seat installed on the transfer base.

[0027] Figure 8 is a three-dimensional structural diagram of the relaxation mechanism assembled on the flipping frame.

[0028] In the figure: 1. Detection machine body; 11. Fixture assembly; 111. Lower pressing plate seat; 112. Washer; 113. Pressing arm; 114. Upper pressing plate seat; 115. Lower pressing plate; 116. Upper pressing plate; 117. Touch pressing plate; 2. Relaxing feeder; 3. Transfer platform; 31. Slide rail; 32. Transfer base; 4. Elastic support seat; 41. Guide post; 42. Support base; 43. Support spring; 5. Flipping mechanism; 51. Flipping frame; 511. Window plate; 512. Guide rail beam; 513. Bearing plate; 52. Flipping driving part; 521. Flipping cylinder; 522. Connecting block; 6. Relaxing mechanism; 61. Clamping assembly; 611. Clamping strip; 612. Clamping spring; 613. Connecting plate; 614. Synchronous guide frame; 615. Side push rod; 62. Relaxing actuator; 621. Slide block; 622. Roller seat; 623. Roller. Specific embodiments

[0029] 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 shall fall within the protection scope of the present invention.

[0030] In order to enable those skilled in the art of this technology to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] As Figure 1 and Figure 2 shown, a mask non-woven fabric air permeability detection device includes a detection machine body 1 for detecting the air permeability of the non-woven fabric and a relaxing feeder 2 arranged in a supporting manner with the detection machine body 1; during the process of detecting the air permeability of the non-woven fabric, the relaxing feeder 2 is used for flattening and pre-tightening the surface of the non-woven fabric to be detected and automatically conveying it to the detection end of the detection machine body 1 for air permeability detection.

[0032] As Figure 1 、 Figure 3 and Figure 4The inspection machine body 1 shown is an inspection device used in the prior art. The inspection end on the inspection machine body 1 is specifically a fixture assembly 11 for clamping both sides of the non-woven fabric. The fixture assembly 11 is located on the tabletop of the inspection machine body 1. The fixture assembly 11 includes a lower pressing plate seat 111 fixed on the tabletop, a pressing arm 113 for performing downward pressing, and an upper pressing plate seat 114 fixed at the end of the pressing arm 113. Both the upper pressing plate seat 114 and the lower pressing plate seat 111 are in the structure of an annular disk with a circular hole in the center. And circular grooves are provided on the upper end surface of the lower pressing plate seat 111 and the lower end surface of the upper pressing plate seat 114. In the groove of the lower pressing plate seat 111, a lower pressing plate 115 is placed in an embedded manner, and a washer 112 made of rubber is usually placed below the lower pressing plate 115. In the groove of the upper pressing plate seat 114, an upper pressing plate 116 is placed in an embedded manner. The upper pressing plate seat 114 generally has magnetism, so as to magnetically adsorb and fix the upper pressing plate 116. The upper pressing plate 116 and the lower pressing plate 115 are a pressing plate group for cooperatively pressing the non-woven fabric. The centers of both the upper pressing plate 116 and the lower pressing plate 115 are also provided with central circular holes. In the fixture assembly 11, the lower pressing plate seat 111, the washer 112, and the lower pressing plate 115 together constitute the lower pressing part, while the pressing arm 113, the upper pressing plate seat 114, and the upper pressing plate 116 together constitute the upper pressing part. The above-mentioned inspection machine body 1 is an inspection device for detecting air permeability by the differential pressure method. The bottom end of the lower pressing plate seat 111 is hermetically fixed and communicated with an air passage, and a test orifice plate is tightly installed in the air passage in an inserted manner. It should be noted that as the prior art, the air passage and the test orifice plate are not shown in the drawings. The test orifice plate is a plate part with a standard opening size selected according to the test standard. During the inspection, after a differential pressure is formed, air sequentially passes through the central circular hole of the upper pressing plate 116, the non-woven fabric, and the central circular hole of the lower pressing plate 115, and then enters the air passage, and finally passes through the opening of the test orifice plate. The opening size of the test orifice plate limits the standard passing area of air. The air permeability value finally measured by the device shows the air passing amount of the test sample per unit time and per unit passing area. The common unit is m³ / m²·s, which is used to characterize the gas permeation ability.

[0033] As Figure 5 and Figure 7 shown, the diastolic feeder 2 includes a transfer platform 3. The transfer platform 3 includes two slide rails 31 horizontally welded on the tabletop of the inspection machine body 1 and a transfer base 32 slidably installed between the two slide rails 31. The two slide rails 31 are distributed on both sides of the fixture assembly 11. A cylinder (not shown in the drawings) can be optionally horizontally installed on the tabletop of the inspection machine body 1, and the output end of the cylinder is connected to the transfer base 32, which can be used to drive the transfer base 32 to slide horizontally along the slide rails 31.

[0034] As Figure 5 and Figure 7As shown in the figure, an elastic support seat 4 with passive lifting is assembled on the transfer base 32; the elastic support seat 4 includes a plurality of guide posts 41 vertically welded to the upper end surface of the transfer base 32, a support base 42 is vertically installed on the plurality of guide posts 41, and a support spring 43 is sleeved on each guide post 41. The two ends of the support spring 43 are respectively welded to the upper end surface of the transfer base 32 and the bottom end surface of the support base 42.

[0035] As Figure 2 , Figure 5 and Figure 6 shown, a flipping mechanism 5 is assembled on the support base 42. The flipping mechanism 5 includes a flipping frame 51 horizontally hinged to the support base 42 and two flipping driving members 52 for driving the flipping frame 51 to flip between a horizontal position state and a vertical position state; the flipping frame 51 includes a window plate 511 and two guide rail beams 512 respectively welded to the horizontal ends of the window plate 511. The window plate 511 and the two guide rail beams 512 make the flipping frame 51 in a C-shaped frame structure; the flipping frame 51 is horizontally rotatably installed on the upper end surface of the support base 42 through the two guide rail beams 512; the two flipping driving members 52 are arranged in one-to-one correspondence with the two guide rail beams 512; the flipping driving member 52 includes a flipping cylinder 521 hinged to the support base 42 and a connecting block 522 welded to the outer side wall of the guide rail beam 512. The output end of the flipping cylinder 521 is hinged to the connecting block 522. In this embodiment, when the extension amount of the telescopic rod of the flipping cylinder 521 is zero, the flipping frame 51 is in a horizontal state, and when the extension amount of the telescopic rod is the largest, the flipping frame 51 is in a vertical state. Two bearing plates 513 are welded on the two guide rail beams 512. When the flipping frame 51 is in a horizontal state, the bearing plates 513 are horizontally located at the top of the guide rail beams 512; two pressure contact plates 117 corresponding to the two bearing plates 513 are horizontally welded to the top end of the upper pressure plate seat 114.

[0036] In addition, as Figure 5 shown, when the flipping frame 51 is in a horizontal state, the length direction of the guide rail beam 512 extends along the direction of the slide rail 31. When the flipping frame 51 is in a vertical state, the window plate 511 is located at the top of the flipping frame 51; with the flipping frame 51 in a horizontal state as the reference, inside the flipping frame 51, vertical guides are welded at positions near both ends on the window plate 511 and at the end positions of the guide rail beam 512 far from the window plate 511. In addition, a guide rail extending along its length direction is also welded on the guide rail beam 512.

[0037] As Figure 6As shown, a relaxation mechanism 6 is assembled on the flipping frame 51. The relaxation mechanism 6 includes a clamping assembly 61 and a relaxation actuator 62. When the flipping frame 51 is flipped to the vertical state, the clamping assembly 61 is located above the relaxation actuator 62. For the sake of description uniformity, the following elaborates on the constituent structures in the relaxation mechanism 6 based on the flipping frame 51 being in the horizontal state.

[0038] As Figure 5 and Figure 8 shown, the clamping assembly 61 includes two clamping bars 611. The two clamping bars 611 are located inside the frame of the flipping frame 51 and are relatively slidably mounted on the vertically guided rails at both ends of the window plate 511. A rectangular window for the non-woven fabric to pass through is provided between the two clamping bars 611 on the window plate 511. At positions near the upper and lower ends on the inner side wall of the window plate 511, connecting plates 613 are horizontally welded. A row of clamping springs 612 is assembled between each connecting plate 613 and the adjacent clamping bar 611. Multiple clamping springs 612 in a row are evenly arranged along the length direction of the clamping bar 611. One end of the clamping spring 612 is embedded and welded on the clamping bar 611, and the other end is welded on the connecting plate 613. Two synchronous guide frames 614 are correspondingly welded on both clamping bars 611. The two synchronous guide frames 614 on the same clamping bar 611 are close to the horizontal two ends of the clamping bar 611, and the two synchronous guide frames 614 on the same clamping bar 611 are slidably mounted on the vertically guided rails of the two guide rail beams 512 in a one-to-one correspondence. To facilitate opening the clamping gap between the two clamping bars 611, side push rods 615 are welded on the same side ends of the two clamping bars 611, and the two side push rods 615 penetrate through the adjacent guide rail beam 512 to the outside.

[0039] As Figure 5 and Figure 8 shown, the relaxation actuator 62 includes two horizontally opposed sliders 621. The two sliders 621 are slidably mounted on the rails extending along the length direction on the two guide rail beams 512 in a one-to-one correspondence. A set of roller holders 622 is assembled on each of the two sliders 621. Each set contains two roller holders 622, and the two roller holders 622 in each set are vertically slidably mounted on the slider 621. The two roller holders 622 in the two sets at the relative positions are slidably mounted on the two synchronous guide frames 614 on the same clamping bar 611 in a one-to-one correspondence, and the sliding direction of the roller holder 622 along the synchronous guide frame 614 is the same as the sliding direction of the slider 621. A roller 623 is horizontally rotatably mounted between the two roller holders 622 in the two sets at the relative positions, and the roller surface of the roller 623 is a rubber layer.

[0040] As Figure 5 and Figure 8As shown, both of the two pinch rollers 623 are horizontally rotatably mounted on two pinch roller seats 622, and the two groups of pinch roller seats 622 are both slidably mounted on two sliders 621. Therefore, the two groups of sliders 621 can cause the two pinch rollers 623 to move synchronously in the length direction of the guide rail beam 512. In this embodiment, a cylinder (not shown in the figure) can be mounted on one of the guide rail beams 512, and the slider 621 at the same side position is fixedly connected to the output end of the cylinder, so as to drive the slider 621 to move. In addition, in order to enable the pinch roller 623 to rotate independently, a micro motor can be mounted on the pinch roller seat 622 at one end of the pinch roller 623, and the pinch roller 623 is driven to rotate by the micro motor. Because the pinch roller seats 622 at both ends of the pinch roller 623 are slidably mounted on two synchronous guide frames 614 on the same clamping strip 611, when the two side push rods 615 are manually spread apart, the clamping gap between the two clamping strips 611 can be increased, and the clamping gap between the two pinch rollers 623 can be synchronously increased. The two clamping strips 611 and the two pinch rollers 623 are arranged in a linkage clamping cooperation.

[0041] When detecting the air permeability of non-woven fabrics of the same production batch, samples can be randomly cut and selected from the non-woven fabric products produced in the same batch, so as to obtain multiple non-woven fabric test samples to be detected.

[0042] In the preparation stage, according to the test standard, as well as according to the material composition and thickness of the non-woven fabric, the corresponding upper pressing plate 116, lower pressing plate 115 and test orifice plate are selected. The upper pressing plate 116 is adsorbed and fixed on the upper pressing plate seat 114, the lower pressing plate 115 is placed on the lower pressing plate seat 111, and the test orifice plate is inserted and pressed tightly in the air passage, and the corresponding test parameters are set for the test machine body, presenting a state to be detected.

[0043] When detecting, the turnover frame is in a vertical state, and the two pinch rollers 623 are in the highest position, adjacent to the two clamping strips 611 up and down; the gaps between the two clamping strips 611 and the two pinch rollers 623 are synchronously opened by manually spreading apart the two side push rods 615. Then, the non-woven fabric is extended into the window of the window plate 511 and passes downward through the gaps between the two clamping strips 611 and the two pinch rollers 623 in sequence. After being lowered to the required length, the two side push rods 615 are released. Under the elastic force of the clamping spring 612, the two clamping strips 611 and the two pinch rollers 623 clamp the non-woven fabric synchronously. It should be noted that in the present invention, the clamping strip 611 is basically in hard clamping contact, and the non-woven fabric is clamped and fixed on one side through clamping, while the two pinch rollers 623 and the non-woven fabric are in flexible clamping contact.

[0044] After the non-woven fabric is clamped, the feeding machine 2 will automatically complete the sorting and inspection conveying of the non-woven fabric. Specifically, when the flipping frame 51 is in the vertical state, the two pinch rollers 623 start to rotate synchronously and move downward synchronously with the slider 621. From the perspective of the two pinch rollers 623 on the left and right sides of the non-woven fabric, the pinch roller 623 on the left side of the non-woven fabric rotates clockwise, and the pinch roller 623 on the right side of the non-woven fabric rotates counterclockwise. Under the reverse rotation and synchronous downward movement of the two pinch rollers 623, the two pinch rollers 623 generate a downward pre-tension force on the non-woven fabric, and the two pinch rollers 623 roll along the two sides of the non-woven fabric, thereby flattening and combing the non-woven fabric, eliminating possible local wrinkles, folds, and slack of the material surface, etc., and the non-woven fabric is stretched and opened.

[0045] Subsequently, while the relaxation mechanism 6 keeps the non-woven fabric in a tensioned state, the non-woven fabric is flipped to the horizontal state with the flipping frame 51. Then, the transfer base 32 moves along the slide rail 31 towards the fixture assembly 11 and drives the non-woven fabric to move closer to the fixture assembly 11. Subsequently, the two pinch rollers 623 pass through between the upper pressure plate 116 and the lower pressure plate 115, so that the non-woven fabric is transferred between the upper pressure plate 116 and the lower pressure plate 115. Then, the pressure arm 113 drives the upper pressure plate seat 114 and the upper pressure plate 116 to descend synchronously. During the descent, the two touch blocks will first touch the two bearing plates 513 correspondingly, so that the support spring 43 is compressed, the support base 42 descends passively, and the non-woven fabric descends synchronously. As it continues to descend, the non-woven fabric will be laid flat on the lower pressure plate 115 and is tightly clamped between the upper pressure plate 116 and the lower pressure plate 115, realizing the clamping of the test sample by the fixture assembly 11. It should be added here that when the non-woven fabric is laid flat and tightly attached to the lower pressure plate 115, the periphery of the non-woven fabric is slightly lower than the middle, having a tendency to increase the tension force. However, the two pinch rollers 623 do not completely clamp the non-woven fabric. Therefore, the two pinch rollers 623 can roll adaptively to actively release and reduce the tension force, which can avoid the increase of pores caused by the deformation of the non-woven fabric, and the same effect is also achieved during the process of flattening and combing the non-woven fabric in the vertical state to achieve pre-tensioning, which can play a role in avoiding excessive tension; in addition, in order to make the periphery of the non-woven fabric smoothly transition and tightly attach to the lower pressure plate 115, therefore, the edge of the lower pressure plate seat 111 is processed with a gentle slope chamfer.

[0046] Subsequently, the detection machine body 1 starts the test and automatically obtains the air permeability-related data of the non-woven fabric sample. After the test is completed, the pressure arm 113 drives the upper pressure plate seat 114 to move upward, and the support base 42 automatically resets. Then, the transfer base 32 drives the relaxation mechanism 6 to remove the clamp assembly 11, and the flip frame 51 flips and resets to a vertical state. When repeating the test of the next non-woven fabric sample, remove the previous non-woven fabric sample, clamp the new non-woven fabric sample on the relaxation mechanism 6, and repeat the test again. After completing repeated testing of multiple non-woven fabric samples, the average of multiple air permeability values ​​can be taken to evaluate the overall air permeability performance of the production batch of non-woven fabrics, and determine whether the performance meets the air permeability requirements of non-woven fabrics for facial masks.

[0047] In the expansion feeder 2 provided by the present invention, the purpose of switching between the horizontal and vertical position states by the flip mechanism 5 is to realize the arrangement and inspection and transportation of non-woven fabric samples. In the vertical state, compared with the horizontal state, under the action of gravity, the non-woven fabric tends to be in a vertical drooping state. When in the horizontal state, under the action of gravity, the middle part of the non-woven fabric will be concave, so the non-woven fabric can better droop and open; thus, on the one hand, it is easier to place the non-woven fabric in the gap between the two clamping strips 611 and the two clamping rollers 623. On the one hand, it facilitates the discharge of materials. On the other hand, it is also convenient to cooperate with the two clamping rollers 623 to smooth and comb the two sides of the non-woven fabric with a relatively uniform clamping force. Here, it should be supplemented that the clamping force of the two clamping rollers 623 on the non-woven fabric is significantly smaller than the clamping force of the two clamping strips 611 on the non-woven fabric. The clamping force of the two clamping rollers 623 can generate a certain pre-tensioning force, so that the non-woven fabric can be stretched and slightly tensioned, but the tensioning force is not enough to cause the non-woven fabric to be stretched and deformed, resulting in an increase in pores, thereby changing the air permeability.

[0048] The present invention provides a mask non-woven fabric air permeability detection device. On the basis of the existing air permeability detection device, a relaxation feeder 2 is arranged in conjunction with the relaxation feeder 2. The non-woven fabric sample material can be smoothed and combed in a vertical state and pre-tensioned within a reasonable tension range through the relaxation feeder 2. The non-woven fabric is automatically transported for inspection and automatically laid flat relative to the detection end of the existing detection device in a horizontal state. The problem that the existing detection equipment needs to manually lay the test sample material and has irregular and inconsistent operations is solved, so that the test sample material is not completely spread out, but has local wrinkles, folds or looseness, which then causes the effective test area of ​​the test sample to be reduced and the pore structure to change, which ultimately affects the test accuracy and the test results. The test efficiency is improved when the test is repeated for many times, the repeatability of multiple tests is guaranteed, the random operation error is reduced, and the test accuracy is improved.

[0049] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0050] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "arranged", "connected", "installed", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific circumstances.

[0051] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and the devices and structures not described in detail should be understood to be implemented in a common manner in the art; any person skilled in the art can make many possible changes and modifications without departing from the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes, which does not affect the essence of the present invention. Therefore, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A facial mask nonwoven fabric air permeability detection device, characterized in that: It includes a detector body and a relaxation feeder configured to match the detector body; a clamp assembly including an upper pressing part and a lower pressing part for clamping both sides of the non-woven fabric is provided on the detector body; The relaxation feeder includes: A transfer platform assembled on the tabletop of the detector body; An elastic support seat assembled on the mobile end face of the moving platform for realizing passive lifting; A flipping mechanism including a flipping frame horizontally hinged to the top end face of the elastic support seat, and the flipping frame flips between two state positions, horizontal and vertical; And a relaxation mechanism assembled on the flipping frame. The relaxation mechanism includes a clamping assembly and a relaxation actuator; when the flipping frame flips to the vertical state, the clamping assembly is located above the relaxation actuator, and the relaxation actuator is vertically movable on the flipping frame. The non-woven fabric to be detected is clamped by the clamping assembly. When the relaxation actuator moves vertically downward, the relaxation actuator generates a vertically downward pre-tensioning force on the non-woven fabric and levels both sides of the non-woven fabric; After the non-woven fabric is relaxed by the relaxation mechanism, the flipping frame flips to the horizontal state, and the non-woven fabric is transferred between the upper pressing part and the lower pressing part through the transfer platform. During the downward pressing of the upper pressing part, the upper pressing part touches and presses the flipping frame, causing the elastic support seat to passively descend, and the non-woven fabric is thereupon pressed tightly between the upper pressing part and the lower pressing part; The clamping assembly includes: Two clamping bars slidably installed opposite to each other on the flipping frame for clamping both sides of the non-woven fabric; The clamping assembly further includes four synchronous guide frames. Two synchronous guide frames are respectively and fixedly connected to each of the two clamping bars, and the synchronous guide frames are slidably installed on the flipping frame in the same direction as the clamping bars; The relaxation actuator includes: Two sliders arranged opposite to each other and slidably installed on the flipping frame. When the flipping frame is in the vertical state, the sliders slide in the vertical direction; Two groups of roller holders arranged in one-to-one correspondence and provided on the two sliders; one group of roller holders located on the slider includes two, and the two roller holders are slidably installed opposite to each other on the slider, and the roller holders and the synchronous guide frames are slidably arranged in the same direction; two roller holders located at opposite positions in the two groups of roller holders are slidably installed on the two synchronous guide frames on the same clamping bar in one-to-one correspondence, and the sliding direction of the roller holders along the synchronous guide frames is the same as the sliding direction of the sliders; And two rollers for making flexible clamping contact with both sides of the non-woven fabric; the rollers are horizontally rotatably installed between two roller holders located at opposite positions in the two groups of roller holders.

2. The air permeability detection device for nonwoven fabrics for facial masks according to claim 1, characterized in that: The clamping assembly and the relaxation actuator are set to be联动夹紧 (co-actuated clamping). When the clamping assembly clamps the non-woven fabric, the relaxation actuator synchronously clamps the non-woven fabric therewith. When the clamping assembly loosens, the relaxation actuator synchronously loosens therewith.

3. The air permeability detection device for nonwoven fabrics for facial masks according to claim 2, characterized in that: The clamping assembly includes: Two rows of clamping springs respectively assembled on the two clamping bars, and one end of the clamping spring is fixedly connected to the side end face of the clamping bar facing away from the clamping end; And two connecting plates both fixed on the flipping frame and arranged in one-to-one correspondence with the two rows of clamping springs. The other end of the clamping spring is fixedly connected to the connecting plate that mates with it.

4. The air permeability detection device for nonwoven fabrics for facial masks according to claim 3, characterized in that: The flipping frame includes: A window plate; And two guide rails fixed to both ends of the window plate correspondingly, making the flipping frame in a C-shaped frame structure; the flipping frame is horizontally rotatably installed on the top end face of the elastic support seat through the two guide rails; Two clamping strips are relatively slidably mounted on the window plate, and the two clamping strips are located in the frame of the flip frame. A window is provided between the two clamping strips on the window plate for the non-woven fabric to pass through; and two connecting plates are fixed on the window plate; The two slide blocks are slidably mounted on the two guide rail beams in a one-to-one correspondence, and the two synchronous guide frames on the same group of clamping roller seats are slidably mounted on the adjacent guide rail beams.

5. The air permeability detection device for nonwoven fabrics for facial masks according to claim 4, characterized in that: A pressure plate is fixed on at least one of the guide rail beams. When the flip frame is in a horizontal state, the pressure plate is located at the top of the guide rail beam. The upper pressure portion is provided with a contact pressure plate that contacts the pressure plate in a corresponding downward pressure manner.

6. The air permeability detection device for nonwoven fabrics for facial masks according to claim 4, characterized in that: The elastic support seat comprises: A plurality of guide pillars are vertically fixed on the moving end surface of the transfer platform; A support base is vertically slidably mounted on a plurality of guide pillars; the guide rail beam is hinged on the upper end surface of the support base; And a plurality of supporting springs are sleeved on the plurality of guide pillars one by one, and the two ends are respectively fixed on the moving end surface of the transfer platform and the bottom end surface of the supporting base.

7. The air permeability detection device for nonwoven fabrics for facial masks according to claim 6, characterized in that: The flipping mechanism also includes at least one flipping driving component mounted on one of the guide rail beams; the flipping driving component includes a flipping cylinder hinged on the upper end surface of the support base and a connecting block fixed on the guide rail beam, and the output end of the flipping cylinder is hinged on the connecting block.

8. The air permeability detection device for nonwoven fabrics for facial masks according to claim 4, characterized in that: A side push rod is fixed to the same side end of the two clamping strips, and the two side push rods penetrate through the adjacent guide rail beams to the outside.

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