Facial mask non-woven fabric air permeability detection equipment

Abstract

The invention relates to the technical field of non-woven fabric performance detection, and particularly provides mask non-woven fabric air permeability detection equipment. Comprising a detection machine body for detecting the air permeability of the non-woven fabric and a stretching feeder matched with the detection machine body; the expansion feeder comprises a transfer platform, an elastic supporting seat assembled on the transfer platform, a turnover mechanism assembled on the elastic supporting seat and an expansion mechanism assembled on the turnover mechanism, the expansion feeder is assembled on the turnover frame, and the expansion mechanism comprises a clamping assembly and an expansion execution part; the to-be-detected non-woven fabric is clamped by the clamping assembly, and when the relaxation execution piece moves vertically downwards, the relaxation execution piece generates vertically-downward pre-tensioning force on the non-woven fabric and conducts flattening treatment on the two faces of the non-woven fabric; according to the equipment provided by the invention, the test efficiency is improved, the repeatability of multiple times of detection is ensured, the random operation error is reduced, and the test precision is improved.

Description

Technical Field

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

[0002] Facial mask nonwoven fabric is a material commonly used in making facial masks. Nonwoven fabric, or non-woven fabric, is different from traditional woven fabrics. It is a kind of fabric made directly from fibers through physical, chemical or thermal methods. The use of nonwoven fabrics in facial mask products mainly utilizes the characteristics of good air permeability, softness and fit, which can effectively carry and transfer essence to the skin. In addition, nonwoven fabrics also have good water absorption and moisturizing properties, which can improve the use effect of facial masks.

[0003] In the production process of non-woven fabrics for facial masks, in order to ensure that each batch of non-woven fabrics can meet the air permeability requirements of non-woven fabrics for facial masks, it is necessary to conduct air permeability testing on non-woven fabrics for facial masks to verify whether they meet the requirements. Under existing technologies, professional air permeability testing equipment is often used to test the air permeability of non-woven fabrics. During the actual testing process, the two sides of the non-woven fabric are pressed together by specially set upper and lower pressure plates, and the equipment automatically forms a pressure difference between the upper and lower sides of the non-woven fabric. Usually, the area below the non-woven fabric is a low-pressure area. Therefore, under the pressure difference, air automatically passes through the non-woven fabric from the top to the bottom to verify the air permeability of the material.

[0004] In the existing testing operation process, the test sample material is usually placed and clamped between the upper and lower pressure plates manually. The mask non-woven fabric itself is thin and soft, and the manual placement and clamping of the non-woven fabric test sample is quite arbitrary, and it is easy to operate in an irregular manner, resulting in the test sample not being completely spread out, and the test sample material having local wrinkles, folds or looseness, thereby causing the effective test area of ​​the test sample to be reduced and the pore structure to change. In actual testing, multiple test samples need to be repeatedly tested. The irregular and non-uniform manual operations increase the random errors of repeated tests, thereby affecting the repeatability of the test. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a mask non-woven fabric air permeability detection device, which is used to solve the problems mentioned in the above background technology.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme to achieve: a mask non-woven fabric air permeability detection device, including a detection machine body for air permeability detection of non-woven fabrics and a stretch feeder matched with the detection machine body; the detection machine body is provided with a clamp assembly including an upper pressure part and a lower pressure part and clamping the two sides of the non-woven fabric; the stretch feeder includes: a transfer platform, which is assembled on the table of the detection machine body; an elastic support seat, which is assembled on the moving end face of the mobile platform for realizing passive lifting; a flip mechanism, including a horizontal hinge A flip frame connected to the top surface of the elastic support seat, the flip frame flips between horizontal and vertical position states; and a relaxation mechanism, assembled on the flip frame, the relaxation mechanism includes a clamping assembly and a relaxation actuator; when the flip frame is flipped to a vertical state, the clamping assembly is located above the relaxation actuator, and the relaxation actuator can move vertically on the flip frame, the non-woven fabric to be tested is clamped by the clamping assembly, and when the relaxation actuator moves vertically downward, the relaxation actuator generates a vertical downward pre-tensioning force on the non-woven fabric, and flattens both sides of the non-woven fabric.

[0007] After the non-woven fabric is stretched by the stretching mechanism, the flip frame flips to a 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 process of the upper pressing part, the upper pressing part touches the flip frame to make the elastic support seat passively descend, and the non-woven fabric is then pressed tightly between the upper pressing part and the lower pressing part.

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

[0009] Preferably, the clamping assembly includes: two clamping strips, which are installed on the flip frame for relative sliding, and are used to clamp the two sides of the non-woven fabric; two rows of clamping springs, which are assembled on the two clamping strips one by one, and one end of the clamping spring is fixedly connected to the side end surface of the clamping strip facing away from the clamping end; and two connecting plates, which are both fixed on the flip frame and are arranged in a one-to-one correspondence with the two rows of clamping springs, and the other end of the clamping spring is fixedly connected to the connecting plate that matches 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 fitted with the clamping bars in the same direction and are installed on the flipping frame; the relaxation actuator includes: two sliders, which are oppositely arranged and slidably fitted on the flipping frame. When the flipping frame is in the 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 and the synchronous guide frames are arranged to slide in the same direction; 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 making flexible clamping contact with 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 rails, 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 surface of the elastic support seat through the two guide rails; 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; two connecting plates are both fixed on the window plate; the two sliders are slidably installed on the two guide rails one by one, and the two synchronous guide frames on the same group of roller seats are slidably installed on the adjacent guide rails.

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

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

[0014] A support base, which is vertically slidably installed on the plurality of guide posts; the guide rail 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 moving 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 member fitted and installed on one of the guide rails; the flipping drive member includes a flipping cylinder hinged on the upper end surface of the support base and a connecting block fixed on the guide rail, and the output end of the flipping cylinder is hinged on the connecting block.

[0017] Preferably, a side push rod is fixed to the same side end of the two clamping strips, and the two side push rods pass through the adjacent guide rail beams to the outside.

[0018] The above technical scheme has the following advantages or beneficial effects: the present invention provides a mask non-woven fabric air permeability detection device, which is equipped with a relaxation feeder on the basis of the existing air permeability detection device. The relaxation feeder can be used to smooth the surface of the non-woven fabric sample in a vertical state and pre-tension it within a reasonable tension range, and the non-woven fabric can be automatically transported for inspection and automatically laid flat relative to the detection end of the existing detection device in a horizontal state, which solves the problem that the existing detection equipment needs to use manual laying of test samples, but has irregular and inconsistent operations, so that the test samples are not completely spread out, but have local wrinkles, folds or looseness, which in turn causes the effective test area of ​​the test sample to be reduced and the pore structure to change, ultimately affecting the test accuracy and test results; when simply repeating the test multiple times, the test efficiency is improved, the repeatability of multiple tests is guaranteed, random operation errors are reduced, and the test accuracy is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention and its features, configurations and advantages will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings. The same reference numerals indicate the same parts throughout the drawings, which are not drawn to scale, with emphasis on illustrating the subject matter of the present invention.

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

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

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

[0023] Figure 4 yes Figure 3 A partial enlarged view of point A in the middle.

[0024] Figure 5 It is a three-dimensional structural diagram of the diastolic feeder.

[0025] Figure 6 It is a top view of the diastolic feeder.

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

[0027] Figure 8 It is a three-dimensional structural diagram of the expansion mechanism assembled on the flip frame.

[0028] In the figure: 1. Inspection machine body; 11. Clamp assembly; 111. Lower pressure plate seat; 112. Washer; 113. Pressure arm; 114. Upper pressure plate seat; 115. Lower pressure plate; 116. Upper pressure plate; 117. Touch plate; 2. Diastrate feeder; 3. Transfer platform; 31. Slide rail; 32. Transfer base; 4. Elastic support seat; 41. Guide column; 42. Support base; 43. Support spring; 5. Turnover mechanism; 5 1. Flip frame; 511. Window plate; 512. Guide rail beam; 513. Pressure plate; 52. Flip drive member; 521. Flip cylinder; 522. Connecting block; 6. Relaxation mechanism; 61. Clamping assembly; 611. Clamping strip; 612. Clamping spring; 613. Connecting plate; 614. Synchronous guide frame; 615. Side push rod; 62. Relaxation actuator; 621. Sliding block; 622. Clamping roller seat; 623. Clamping roller. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

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

[0031] like Figure 1 and Figure 2 As shown, a mask non-woven fabric air permeability testing device includes a testing machine body 1 for testing the air permeability of the non-woven fabric and a stretch feeder 2 matched with the testing machine body 1; during the air permeability testing of the non-woven fabric, the stretch feeder 2 is used to smooth and comb the surface of the tested non-woven fabric and pre-tension it, and automatically transport it to the testing end of the testing machine body 1 for air permeability testing.

[0032] like Figure 1 , Figure 3 and Figure 4The detection machine body 1 shown is a detection device used in the prior art. The detection end on the detection machine body 1 is specifically a clamp assembly 11 for clamping the two sides of the non-woven fabric. The clamp assembly 11 is located on the table of the detection machine body 1. The clamp assembly 11 includes a lower pressure plate seat 111 fixed on the table, a pressure arm 113 for performing downward pressure, and an upper pressure plate seat 114 fixed to the end of the pressure arm 113. The upper pressure plate seat 114 and the lower pressure plate seat 111 are both an annular disk structure with a circular hole in the center, and the upper end surface of the lower pressure plate seat 111 and the upper The lower end surface of the pressure plate seat 114 is provided with a circular groove, the groove of the lower pressure plate seat 111 is used to embed the lower pressure plate 115, and a rubber gasket 112 is usually placed under the lower pressure plate 115, and the groove of the upper pressure plate seat 114 is used to embed the upper pressure plate 116. The upper pressure plate seat 114 is generally magnetic, so as to be used for magnetic adsorption and fixing the upper pressure plate 116; the upper pressure plate 116 and the lower pressure plate 115 are a pressure plate group for cooperating to press the non-woven fabric, and the centers of the upper pressure plate 116 and the lower pressure plate 115 are also provided with A central circular hole is provided; in the fixture assembly 11, the lower pressure plate seat 111, the gasket 112 and the lower pressure plate 115 together constitute the lower pressure part, and the pressure arm 113, the upper pressure plate seat 114 and the upper pressure plate 116 together constitute the upper pressure part. The above-mentioned detection machine body 1 is a detection device that uses a pressure difference method to detect air permeability. The bottom end of the lower pressure plate seat 111 is sealed and fixedly connected to an air channel, and a test orifice plate is inserted and pressed in the air channel. It should be noted that, as a prior art, the air channel and the test orifice plate are not shown in the accompanying drawings; the test The orifice plate is a plate with a standard opening size selected according to the test standard. During the test, after the pressure difference is formed, the air passes through the central circular hole of the upper pressure plate 116, the non-woven fabric and the central circular hole of the lower pressure plate 115 in turn, and enters the air channel, and finally passes through the opening of the test orifice plate. The opening size of the test orifice plate defines the standard air passage area. The air permeability value finally measured by the equipment shows the air passage amount of the test sample per unit time and per unit passage area. The commonly used unit is m³ / m²·s, which is used to characterize the gas permeability.

[0033] like Figure 5 and Figure 7 As shown, the expansion feeder 2 includes a transfer platform 3, which includes two slide rails 31 horizontally welded on the table top of the detection 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 (the cylinder is not shown in the accompanying drawings) can be selectively installed horizontally on the table top of the detection 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] like Figure 5 and Figure 7As shown in the figure, an elastic support seat 4 that moves passively 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 in the figure, 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 correspondingly 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 contact plates 117 corresponding to and pressing against the two bearing plates 513 are horizontally welded to the top end of the upper pressing plate seat 114.

[0036] In addition, as Figure 5 shown in the figure, 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 a reference, inside the flipping frame 51, guide rails vertically guiding 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 mounted on the flip frame 51, and the relaxation mechanism 6 includes a clamping assembly 61 and a relaxation actuator 62; when the flip frame 51 is flipped to a vertical state, the clamping assembly 61 is located above the relaxation actuator 62; for the sake of uniformity of description, the following detailed description of each component structure in the relaxation mechanism 6 is based on the flip frame 51 being in a horizontal state.

[0038] like Figure 5 and Figure 8 As shown, the clamping assembly 61 includes two clamping strips 611, which are located in the frame of the flip frame 51 and are relatively slidably installed on the vertical guide rails at both ends of the window plate 511. A rectangular window for allowing the non-woven fabric to pass through is opened between the two clamping strips 611 on the window plate 511; connecting plates 613 are horizontally welded on the inner wall of the window plate 511 near the upper and lower ends, and a row of clamping springs 612 are installed between the connecting plate 613 and the adjacent clamping strips 611. Multiple clamping springs 612 in one row are evenly arranged and distributed along the length direction of the clamping strip 611, and one end of the clamping spring 612 is embedded and welded on the clamping strip 611, and the other end is welded on the connecting plate 613. Two synchronous guide frames 614 are welded to the two clamping strips 611, and the two synchronous guide frames 614 on the same clamping strip 611 are close to the horizontal ends of the clamping strip 611, and the two synchronous guide frames 614 on the same clamping strip 611 are slidably mounted on the vertical guide rails of the two guide rail beams 512 in a one-to-one correspondence. In order to facilitate opening the clamping gap of the two clamping strips 611, side push rods 615 are welded to the same side ends of the two clamping strips 611, and the two side push rods 615 pass through the adjacent guide rail beams 512 to the outside.

[0039] like Figure 5 and Figure 8 As shown, the relaxation actuator 62 includes two horizontally oppositely arranged sliders 621, and the two sliders 621 are slidably mounted one by one on the guide rails extending along the length direction on the two guide beams 512; each of the two sliders 621 is equipped with a group of clamping roller seats 622, each group includes two clamping roller seats 622, and each group of two clamping roller seats 622 are vertically relatively slidably mounted on the sliders 621, and the two clamping roller seats 622 located at opposite positions in the two groups of clamping roller seats 622 are slidably mounted one by one on the two synchronous guide frames 614 on the same clamping strip 611, and the clamping roller seats 622 are arranged in the same direction as the sliding direction of the synchronous guide frame 614 and the sliding direction of the slider 621; a clamping roller 623 is horizontally rotatably mounted between the two clamping roller seats 622 located at opposite positions in the two groups of clamping roller seats 622, and the roller surface of the clamping roller 623 is a rubber layer.

[0040] like Figure 5 and Figure 8As shown, the two clamping rollers 623 are both horizontally rotatably mounted on the two clamping roller seats 622, and the two groups of clamping roller seats 622 are both slidably mounted on the two sliders 621, so the two groups of sliders 621 can make the two clamping rollers 623 move synchronously along the length direction of the guide beam 512. In this embodiment, a cylinder (the cylinder is not shown in the figure) can be installed on one of the guide beams 512, and the slider 621 on the same side is fixedly connected to the output end of the cylinder, thereby driving the slider 621 to move; in addition, in order to enable the clamping roller 623 to rotate autonomously, a micro motor can be installed on the clamping roller seat 622 at one end of the clamping roller 623, and the clamping roller 623 is driven to rotate by the micro motor. Because the clamping roller seats 622 at both ends of the clamping 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 extended, the clamping gap of the two clamping strips 611 can be increased, and the clamping gap between the two clamping rollers 623 can be increased synchronously, and the two clamping strips 611 and the two clamping rollers 623 are arranged in a linkage and coordinated clamping arrangement.

[0041] When conducting air permeability testing on non-woven fabrics from the same production batch, non-woven fabric products produced in the same batch can be randomly cut and selected to obtain multiple non-woven fabric test samples to be tested.

[0042] During the preparation stage, according to the test standards, as well as the material composition and thickness of the non-woven fabric, select the corresponding upper pressure plate 116, lower pressure plate 115 and test hole plate, adsorb and fix the upper pressure plate 116 on the upper pressure plate seat 114, place the lower pressure plate 115 on the lower pressure plate seat 111, insert and press the test hole plate into the air channel, and set the corresponding test parameters for the test machine body, and put it in a state to be tested.

[0043] During the inspection, the flip frame is in a vertical state, and the two clamping rollers 623 are in the highest position, close to the two clamping strips 611 above and below; the gaps between the two clamping strips 611 and the two clamping rollers 623 are opened synchronously by manually extending the two side push rods 615, and 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 clamping rollers 623 in turn. After being lowered to the required length, the two side push rods 615 are released, and under the elastic force of the clamping spring 612, the two clamping strips 611 and the two clamping 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 clamping and fixing of one side of the non-woven fabric is achieved by clamping, while the two clamping rollers 623 are in flexible clamping contact with the non-woven fabric.

[0044] After the non-woven fabric is clamped, the stretch feeder 2 will automatically complete the non-woven fabric sorting and inspection and transportation. Specifically, the flip frame 51 is in a vertical state, and the two clamping rollers 623 start to rotate synchronously, and move downward synchronously with the slider 621. From the perspective that the two clamping rollers 623 are on the left and right sides of the non-woven fabric, the clamping roller 623 on the left side of the non-woven fabric rotates clockwise, and the clamping roller 623 on the right side of the non-woven fabric rotates counterclockwise. With the counter-rotating cooperation and synchronous downward movement of the two clamping rollers 623, the two clamping rollers 623 generate a downward pre-tensioning force on the non-woven fabric, and the two clamping rollers 623 roll along the two sides of the non-woven fabric, thereby smoothing and combing the non-woven fabric, eliminating possible local wrinkles, folds and loose material surface problems, and the non-woven fabric can be stretched and opened.

[0045] Subsequently, while the stretching mechanism 6 keeps the non-woven fabric in tension, the non-woven fabric flips to a horizontal state along with the flip frame 51. Then, the transfer base 32 approaches the clamp assembly 11 along the slide rail 31, and drives the non-woven fabric to move closer to the clamp assembly 11. Subsequently, the two clamping rollers 623 pass 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 to descend synchronously together with the upper pressure plate 116. During the descent, the two contact blocks will first contact and press on the two pressure plates 513 accordingly, so that the support spring 43 is compressed, the support base 42 is passively descended, and the non-woven fabric is synchronously descended. As it continues to descend, the non-woven fabric will be laid flat on the lower pressure plate 115, and pressed up and down between the upper pressure plate 116 and the lower pressure plate 115, so that the clamp assembly 11 can clamp the test sample. It should be added here that when the non-woven fabric is laid flat and pressed against the lower pressure plate 115, the non-woven fabric is slightly lower around the sides relative to the middle, and there is a tendency to increase the tension, but the two clamping rollers 623 do not completely clamp the non-woven fabric, so the two clamping rollers 623 can roll adaptively to actively release and reduce the tension, which can avoid the deformation of the non-woven fabric and cause the pores to increase, and the non-woven fabric is flattened and combed in a vertical state to achieve pre-tensioning. The above effect is also achieved to avoid excessive tension; in addition, in order to make the non-woven fabric smoothly transition around and press against the lower pressure plate 115, 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 is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 understood as a limitation on the present invention.

[0050] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0051] The above describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can make many possible changes and modifications without departing from the technical solution of the present invention, or modify them into equivalent embodiments with equivalent changes, which does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still 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 comprises a detection machine body (1) and a relaxation feeder (2) matched with the detection machine body (1); the detection machine body (1) is provided with a clamp assembly (11) comprising an upper pressing part and a lower pressing part and clamping both sides of the non-woven fabric; The diastolic feeder (2) comprises: The transfer platform (3) is mounted on the table of the detection machine body (1); An elastic support seat (4) is mounted on the moving end surface of the moving platform to realize passive lifting; The flip mechanism (5) comprises a flip frame (51) horizontally hinged on the top surface of the elastic support seat (4), and the flip frame (51) flips between horizontal and vertical positions; and a relaxation mechanism (6) mounted on the flip frame (51), the relaxation mechanism (6) comprising a clamping assembly (61) and a relaxation actuator (62); when the flip frame (51) is flipped to a vertical state, the clamping assembly (61) is located above the relaxation actuator (62), and the relaxation actuator (62) can move vertically on the flip frame (51), and the non-woven fabric to be tested is clamped by the clamping assembly (61); when the relaxation actuator (62) moves vertically downward, the relaxation actuator (62) generates a vertical downward pre-tensioning force on the non-woven fabric, and flattens both sides of the non-woven fabric; After the non-woven fabric is stretched by the stretching mechanism (6), the flip frame (51) flips to a horizontal state, and the non-woven fabric is transferred to between the upper pressing part and the lower pressing part through the transfer platform (3). During the downward pressing process of the upper pressing part, the upper pressing part contacts the flip frame (51), causing the elastic support seat (4) to passively descend, and the non-woven fabric is then pressed tightly between the upper pressing part and the lower pressing part.

2. The air permeability detection device for nonwoven fabrics for facial masks according to claim 1, characterized in that: The clamping assembly (61) and the relaxation actuator (62) are arranged in a linked clamping manner. When the clamping assembly (61) clamps the non-woven fabric, the relaxation actuator (62) clamps the non-woven fabric synchronously therewith. When the clamping assembly (61) is released, the relaxation actuator (62) is released synchronously therewith.

3. The air permeability detection device for nonwoven fabrics for facial masks according to claim 2, characterized in that: The clamping assembly (61) comprises: Two clamping strips (611) are relatively slidably mounted on the turning frame (51) and are used to clamp the two sides of the non-woven fabric; Two rows of clamping springs (612) are mounted on the two clamping strips (611) in a one-to-one correspondence, and one end of the clamping spring (612) is fixedly connected to the side end surface of the clamping strip (611) facing away from the clamping end; And two connecting plates (613) are fixed on the flip frame (51) and are arranged in a one-to-one correspondence with the two rows of clamping springs (612). The other end of the clamping spring (612) is fixedly connected to the connecting plate (613) matched therewith.

4. The air permeability detection device for nonwoven fabrics for facial masks according to claim 3, characterized in that: The clamping assembly (61) further comprises four synchronous guide frames (614), and the two clamping strips (611) are respectively and correspondingly fixedly connected with two synchronous guide frames (614), and the synchronous guide frames (614) and the clamping strips (611) are slidably mounted on the flip frame (51) in the same direction; The relaxation actuator (62) comprises: Two sliding blocks (621) are arranged opposite to each other and are slidably mounted on the flip frame (51). When the flip frame (51) is in a vertical state, the sliding blocks (621) slide in a vertical direction. Two groups of pinch roller seats (622) are correspondingly arranged on two sliders (621); one group of pinch roller seats (622) located on the slider (621) contains two, and the two pinch roller seats (622) are slidably installed on the slider (621) relatively, and the pinch roller seats (622) and the synchronous guide frame (614) are arranged to slide in the same direction; two pinch roller seats (622) in the two groups of pinch roller seats (622) located in the relative positions are slidably installed on two synchronous guide frames (614) on the same pinch bar (611) correspondingly, and the sliding direction of the pinch roller seats (622) along the synchronous guide frame (614) is the same as the sliding direction of the slider (621). And two pinch rollers (623) are used for making flexible clamping contact with both sides of the non-woven fabric; the pinch rollers (623) are horizontally rotatably installed between two pinch roller seats (622) in the two groups of pinch roller seats (622) located in the relative positions.

5. The air permeability detection device for nonwoven fabrics for facial masks according to claim 4, characterized in that: The flipping frame (51) includes: A window plate (511); And two guide rail beams (512) are correspondingly fixed at both ends of the window plate (511) so that the flipping frame (51) has a U-shaped frame structure; the flipping frame (51) is horizontally rotatably installed on the top end surface of the elastic support base (4) through the two guide rail beams (512). Two pinch bars (611) are slidably installed on the window plate (511) relatively, and the two pinch bars (611) are located inside the frame of the flipping frame (51), and a window for the non-woven fabric to pass through is opened between the two pinch bars (611) relatively on the window plate (511); two connecting plates (613) are both fixed on the window plate (511). Two sliders (621) are slidably installed on the two guide rail beams (512) correspondingly, and two synchronous guide frames (614) on the same group of pinch roller seats (622) are slidably installed on the adjacent guide rail beams (512).

6. The air permeability detection device for nonwoven fabrics for facial masks according to claim 5, characterized in that: At least one bearing plate (513) is fixed on one of the guide rail beams (512), and when the flipping frame (51) is in a horizontal state, the bearing plate (513) is located at the top end of the guide rail beam (512); a touch plate (117) corresponding to press down and contact with the bearing plate (513) is arranged on the upper pressing part.

7. The air permeability detection device for nonwoven fabrics for facial masks according to claim 5, characterized in that: The elastic support base (4) includes: A plurality of guide posts (41) are all vertically fixed on the mobile end surface of the transfer platform (3); A support base (42) is vertically slidably installed on the plurality of guide posts (41); the guide rail beam (512) is hinged on the upper end surface of the support base (42); And a plurality of support springs (43) are correspondingly sleeved on the plurality of guide posts (41), and the two ends are respectively fixed on the mobile end surface of the transfer platform (3) and the bottom end surface of the support base (42).

8. The air permeability detection device for nonwoven fabrics for facial masks according to claim 7, characterized in that: The flipping mechanism (5) further includes at least one flipping driving part (52) installed on one of the guide rail beams (512) in a matching manner; the flipping driving part (52) includes a flipping cylinder (521) hinged on the upper end surface of the support base (42) and a connecting block (522) fixed on the guide rail beam (512), and the output end of the flipping cylinder (521) is hinged on the connecting block (522).

9. The air permeability detection device for nonwoven fabrics for facial masks according to claim 5, characterized in that: A side push rod (615) is fixed to the same side end of the two clamping strips (611), and the two side push rods (615) pass through the adjacent guide rail beams (512) to the outside.

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