Equipment and method for testing permeability in production process of dry and comfortable sanitary napkins with high-molecular water-absorbing factors

Abstract

The invention relates to the technical field of sanitary napkin permeability testing, in particular to permeability testing equipment and method in the production process of dry and comfortable sanitary napkins with macromolecular water-absorbing factors, the permeability testing equipment comprises a support assembly, the support assembly is composed of a bottom plate and a rear side plate, a clamping assembly is arranged on the front side of the rear side plate, and a measuring assembly is arranged on the bottom plate; the clamping assembly comprises a clamping plate structure, a pressing plate and a pressing rod, the clamping plate structure comprises a clamping plate and a connecting cylinder, the measuring assembly comprises a liquid collecting tank, a measuring cylinder and a collecting box, transmission structures are arranged on the two sides of the collecting box, and a piston structure is arranged in the measuring cylinder. According to the device, by arranging the clamping assembly and the measuring assembly, when a sanitary towel is taken down, collected redundant simulation liquid is directly discharged out of the measuring cylinder, operation is convenient and easy, meanwhile, a cleaning ring can clean the inner wall of the measuring cylinder, the situation that the accuracy of next detection is affected by simulation liquid residues is avoided, and meanwhile the device is provided with an angle adjusting structure; the placement angle of the sanitary napkin can be adjusted before detection so as to meet experimental requirements.

Description

Technical Field

[0001] The invention belongs to the technical field of permeability testing of sanitary napkins, in particular to a device and a method for testing permeability of dry sanitary napkins with high molecular weight water absorption factors during production. Background Art

[0002] High-molecular-weight, water-absorbing, and dry sanitary napkins are traditional sanitary napkins that incorporate high-molecular-weight, water-absorbing materials to enhance absorption and dryness. They play a key role in menstrual care. During sanitary napkin production, sampling and testing of the permeability of sanitary napkins is often required, including tests for slippage rate, re-permeation rate, and leakage rate.

[0003] For example, the patent with authorization announcement number CN211318138U discloses a sanitary napkin penetration test device in the field of sanitary napkin penetration test, comprising an arc-shaped base, an arc-shaped pressure plate is arranged above the base, the pressure plate and the base are transitionally matched, and a gap for placing test samples is formed between the pressure plate and the base, vertical pipes are welded on the left and right sides of the base, the top two ends of the pressure plate are horizontally bent outward to form a flat plate part, and an insertion rod is welded at the bottom of the flat plate part, the insertion rod passes downward through the vertical pipe and is threadedly connected to a bottom plate, a plurality of connecting sleeves are annularly arranged on the inner arc surface of the pressure plate, the connecting sleeve passes through the pressure plate, and a water storage pipe is threadedly connected to the inner sleeve, a ball valve is installed at the lower end of the water storage pipe, the water storage pipe has a scale, a groove is penetrated through the inner surface of the base, and a support net is arranged in the groove.

[0004] Combining the above cases with actual conditions, we found the following problems: In the permeability test of sanitary napkins, multiple groups of tests need to be performed on sanitary napkins from the same batch. At the same time, since the amount of simulated liquid used for the test is small and slightly sticky, if a small amount of simulated liquid remains in the measuring vessel, it will have a greater impact on the test results. Therefore, manual cleaning is required, which is troublesome and affects test efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide a permeability performance testing device and method in the production process of high-molecular water-absorbing factor dry sanitary napkins. By setting a clamping component and a measuring component, after the test is completed, it is only necessary to press the pressure rod to make the clamping plate on the upper side of the front end tilt up and pull the first pull rope upward to drive the first rotating plate and the second rotating plate to rotate synchronously, and then the transmission rod causes the transmission rod and the movable plate to slide down and drive the piston to exit the measuring cylinder. When the piston moves downward, the cleaning ring moves downward synchronously to clean the simulated liquid remaining on the inner wall of the measuring cylinder to solve the above-mentioned problems of the prior art.

[0006] To achieve the above-mentioned object, the present invention provides a permeability testing device for a high molecular weight water absorption factor dry sanitary napkin during production, comprising a support assembly, the support assembly comprising a bottom plate and a rear side plate, a clamping assembly being provided on the front side of the rear side plate, and a measuring assembly being provided on the bottom plate; The clamping assembly includes two left and right clamping plate structures, a pressing plate and two pressure rods. The clamping plate structure includes two upper and lower clamping plates and a connecting tube. The rear end of the clamping plate is fixed with an inclined plate, the rear end of the inclined plate is fixed with a connecting plate, and the rear end of the lower connecting plate is slidably connected to a hinge support. The two pressure rods are respectively fixed to the left and right ends of the bottom surface of the pressing plate, and the bottom ends of the pressure rods are hinged to the corresponding hinge supports. In this configuration, by providing a clamping plate structure and a pressing plate, when fixing the sanitary napkin, pressing the pressing plate drives the pressure rods on both sides to press down the connecting plate hinged to it, and under the transmission of the inclined plate, the corresponding clamping plate on the upper front end is tilted to open the clamping plate structure, making it easier to place the sanitary napkin; The measuring assembly includes a liquid collecting tank, a measuring cylinder and a collecting box, a transmission structure is provided on the left and right sides of the collecting box, a piston structure is provided in the measuring cylinder, the transmission structure includes a first rotating plate and a second rotating plate, the inner side of the second rotating plate is rotatably connected to the outer wall of the corresponding side of the collecting box, the inner side of the first rotating plate is coaxially fixedly connected to the outer side of the second rotating plate, a first pull rope is provided on the outer edge of the first rotating plate, one end of the first pull rope is fixed to the outer edge of the first rotating plate, and the other end is fixed to the front end of the top of the splint on the corresponding side, the piston structure includes a movable plate, a piston and a cleaning ring, a transmission rod is fixed on the left and right sides of the movable plate, a second pull rope is provided on the outer edge of the second rotating plate, one end of the second pull rope is fixed to the outer edge of the second rotating plate, and the other end is fixed to the outer wall of the transmission rod on the corresponding side against the top; In this setting, by setting a measuring cylinder, a transmission structure and a piston structure, when the pressure rod is pressed to tilt the clamping plate on the upper side of the front end, the first pull rope will be pulled upward to drive the first rotating plate and the second rotating plate to rotate synchronously, and then the transmission rod will be pulled downward by the second pull rope to make the transmission rod and the movable plate slide down and drive the piston to exit the measuring cylinder, so that the simulated liquid inside the measuring cylinder flows into the collection box. When the piston moves downward, the cleaning ring moves downward synchronously to clean the simulated liquid remaining on the inner wall of the measuring cylinder to avoid simulated liquid residue affecting the accuracy of the next test.

[0007] In the technical solution of the present invention, the rear side panel is vertically fixed to the rear end of the base panel, and side baffles and installation boxes are fixed to the left and right sides of the front side wall of the rear side panel near the top respectively.

[0008] In the technical solution of the present invention, an angle adjustment structure is provided in the installation box, and the angle adjustment structure includes a rotating rod and several regularly distributed flanges. The right end of the rotating rod is rotatably connected to the right inner wall of the installation box, and the left end is rotatably connected to the right wall of the side baffle. The rear end of the connecting tube is a solid structure and a flange hole is provided in the middle part that passes through the left and right parts. The rotating rod passes through the two flange holes in sequence, and the position of the flange corresponds to the position of the flange hole.

[0009] In the technical solution of the present invention, a handwheel is provided on the top surface of the installation box, a worm is coaxially fixed below the handwheel, a worm wheel meshing with each other is provided on the front side of the worm, and the worm wheel is coaxially fixed to the right end of the rotating rod.

[0010] In this setting, by setting up an angle adjustment structure, before the test, the tester turns the handwheel, which drives the rotating rod to rotate through the transmission of the worm and worm gear, and then drives the connecting tube and the splint to rotate counterclockwise with the cooperation of the flange and the flange hole, so that the sanitary napkin is tilted with the front lower and the back higher, so that the poured simulated liquid can slide along the tilt direction to meet the test needs.

[0011] In the technical solution of the present invention, the front end of the connecting tube is a hollow structure, the inclined plate and the connecting plate are both arranged in the connecting tube on the corresponding side, the two inclined plates are arranged in an X-shaped cross, and a shaft rod is horizontally provided at the intersection of the two inclined plates. The shaft rod is rotatably connected to the inclined plate, and a spring spring is sleeved on the middle part of the shaft rod.

[0012] In this setting, by setting an inclined plate, when the pressing plate is pressed, the inclined plate connected to the connecting plate at the bottom will rotate clockwise around the shaft and compress the spring, causing the front splint to tilt up and open. After releasing the hand, the splint is reset by the spring spring.

[0013] In the technical solution of the present invention, the rear end of the upper connecting plate is fixed to the front end of the solid part on the rear side of the connecting tube, the bottom end of the pressure rod passes downward through the corresponding outer wall of the connecting tube and the upper connecting plate in sequence, and a connecting sleeve is fixed to the rear end of the lower connecting plate. The front end of the hinge support is slidably connected to the connecting sleeve, and the bottom end of the pressure rod is hinged to the hinge support.

[0014] In this configuration, a connecting sleeve is provided to avoid a situation in which the distance between the hinge support and the connecting plate cannot be increased when the connecting plate rotates, thereby causing the entire device to be unusable.

[0015] In the technical solution of the present invention, the liquid collection tank is installed in the middle of the bottom plate, the middle of the bottom surface of the liquid collection tank is connected with the top of the measuring cylinder, the bottom end of the measuring cylinder is connected with the middle of the top surface of the collection box, the piston is in the shape of a cone with a small diameter at the upper part and a large diameter at the lower part, the middle diameter of the piston is the same as the inner diameter of the bottom opening of the measuring cylinder, and the bottom surface of the piston is fixed in the middle of the top surface of the movable plate.

[0016] In this setting, the bottom of the measuring cylinder is blocked by a piston to prevent the simulated liquid from flowing into the collection box when the volume is read. It should be noted that a drain port is provided on the rear side wall of the collection box to facilitate the discharge of the collected simulated liquid.

[0017] In the technical solution of the present invention, a vertical rod is fixed above the top surface of the piston, the top end of the vertical rod is fixed to the cleaning ring, the outer wall of the cleaning ring is fitted with the inner wall of the measuring cylinder, a rope ring is fixed on the top surface of the upper splint near the front end, and the upper end of the first pull rope is tied to the corresponding rope ring.

[0018] In this setting, by setting a cleaning ring, when the piston moves down, the cleaning ring moves down synchronously to clean the simulated liquid remaining on the inner wall of the measuring cylinder. This is not only convenient to use, but also avoids the residual simulated liquid from affecting the next test.

[0019] In the technical solution of the present invention, a number of regularly distributed limit rods are provided between the upper and lower top surfaces of the collection box. The limit rods pass through the same movable plate and the two are slidably connected. The outer wall portion of the limit rod located between the inner bottom surface of the collection box and the bottom surface of the movable plate is provided with a spring, and the top end of the transmission rod passes through the top surface of the collection box.

[0020] In this arrangement, the movable plate is pushed up by the elastic force of the spring, thereby driving the piston to tightly press against the bottom opening of the measuring cylinder, and the top end of the transmission rod passes through the top surface of the collection box.

[0021] On the other hand, the present invention also provides a method for testing the permeability of a dry sanitary napkin having a high molecular weight water absorption factor during production, using the above-mentioned device for testing the permeability of a dry sanitary napkin having a high molecular weight water absorption factor during production, comprising the following steps: S1. The tester presses the pressing plate with one hand, and uses the pressure rod to press the hinged connecting plate to lift the upper clamping plate on the front end and open the clamping structure. Then, with the other hand, align the two ends of the sanitary napkin with the clamping structures on both sides and place it; S2. After placement is complete, the tester rotates the handwheel, which drives the rotating rod through the transmission of the worm and worm gear. In turn, the flange and the flange hole cooperate to drive the connecting tube and the clamping plate to rotate counterclockwise, so that the sanitary napkin is tilted with the front lower and the back higher; S3. After adjusting the angle appropriately, the tester pours a volume of simulated liquid, M0, onto the sanitary napkin. Part of the simulated liquid is quickly absorbed by the sanitary napkin, while the rest slides down the liquid collecting groove and flows into the graduated cylinder. The volume of simulated liquid in the graduated cylinder is read as M1. The volume of simulated liquid absorbed, M2, = M0 - M1, and the slippage rate can be obtained. S4. After the test is completed, the tester turns the handwheel to make the sanitary napkin level again, and then presses the pressure rod again to tilt the clamping plate on the upper side of the front end and pulls the first pull rope upward to drive the first rotating plate and the second rotating plate to rotate synchronously, and then pulls the transmission rod downward through the second pull rope to make the transmission rod and the movable plate slide down and drive the piston to exit the measuring cylinder, so that the simulated liquid inside the measuring cylinder flows into the collection box. When the piston moves downward, the cleaning ring moves downward synchronously to clean the simulated liquid remaining on the inner wall of the measuring cylinder.

[0022] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In the present invention, by setting a clamping assembly and a measuring assembly, after the test is completed, the tester turns the handwheel to make the sanitary napkin level again, and then presses the pressure rod again to tilt the clamping plate on the upper side of the front end and pulls the first pull rope upward to drive the first rotating plate and the second rotating plate to rotate synchronously, and then pulls the transmission rod downward through the second pull rope to make the transmission rod and the movable plate slide down and drive the piston to exit the measuring cylinder, so that the simulated liquid inside the measuring cylinder flows into the collection box. When the piston moves downward, the cleaning ring moves downward synchronously to clean the simulated liquid remaining on the inner wall of the measuring cylinder, which is convenient to use and improves the detection efficiency.

[0023] 2. In the present invention, a clamping assembly is provided. During the test, the tester presses the pressing plate with one hand, and presses the connecting plate hinged to it through the pressure rod, so that the splint on the upper side of the front end is tilted up and the splint structure is opened. Then, the tester uses the other hand to align the two ends of the sanitary napkin with the splint structures on both sides. The operation is simple and convenient, and the detection efficiency is further improved.

[0024] 3. In the present invention, by setting an angle adjustment structure, after placement is completed, the tester turns the handwheel, which drives the rotating rod to rotate through the transmission of the worm and worm gear, and then drives the connecting tube and the clamping plate to rotate counterclockwise with the cooperation of the flange and the flange hole, so that the sanitary napkin is tilted with the front lower and the back higher, so that the poured simulated liquid can slide down the sanitary napkin test area. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the clamping assembly of the present invention; Figure 3 This is an exploded view of the angle adjustment structure of the present invention; Figure 4 Schematic diagram of the pressing plate in the present invention; Figure 5 It is a cross-sectional view of the connecting tube in the present invention; Figure 6 This is an exploded view of the splint structure of the present invention; Figure 7 It is a cross-sectional view of the hinge support in the present invention; Figure 8 Schematic diagram of the measurement component in the present invention; Figure 9 A cross-sectional view of a measurement component in the present invention; Figure 10 Schematic diagram of the piston structure in the present invention; Description of reference numerals: 100, bracket assembly; 101, bottom plate; 102, rear side plate; 103, installation box; 104, side baffle; 200, clamping assembly; 201, pressing plate; 202, pressing rod; 203, rope ring; 210, clamping plate structure; 211, clamping plate; 212, connecting tube; 213, flange hole; 214, inclined plate; 215, connecting plate; 216, hinge support; 217, shaft; 218, spring; 219, connecting sleeve; 220, angle adjustment structure; 221, rotating rod; 222, flange; 223, worm gear; 224, worm; 225, handwheel; 300. Measuring assembly; 301. Liquid collecting tank; 302. Measuring cylinder; 303. Collecting box; 310. Transmission structure; 311. First rotating plate; 312. Second rotating plate; 313. First pull rope; 314. Second pull rope; 315. Transmission rod; 320. Piston structure; 321. Movable plate; 322. Piston; 323. Vertical rod; 324. Cleaning ring; 325. Limit rod; 326. Spring. DETAILED DESCRIPTION

[0026] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0027] Unless expressly stated otherwise, throughout the specification, the term “comprise” or variations thereof such as “include” or “comprising” will be understood to include the stated elements or components but not to exclude other elements or components.

[0028] Reference Figures 1-10 As shown, this embodiment provides a technical solution: The permeability testing equipment for high-molecular-water-absorption factor dry sanitary napkins during production includes a support assembly 100, which is composed of a base plate 101 and a rear side plate 102. A clamping assembly 200 is provided on the front side of the rear side plate 102. A measuring assembly 300 is provided on the base plate 101. The clamping assembly 200 is provided to fix the high-molecular-water-absorption factor dry sanitary napkin, and the measuring assembly 300 is used to measure the volume of unabsorbed simulated liquid during testing, thereby testing the slippage rate of the sanitary napkin. The clamping assembly 200 includes two left and right clamping plate structures 210, a pressing plate 201 and two pressure rods 202. The clamping plate structure 210 includes two upper and lower clamping plates 211 and a connecting tube 212. The rear end of the clamping plate 211 is fixed with an inclined plate 214, and the rear end of the inclined plate 214 is fixed with a connecting plate 215. The rear end of the lower connecting plate 215 is slidably connected with a hinge support 216. The two pressure rods 202 are respectively fixed to the left and right ends of the bottom surface of the pressing plate 201 by bolts. The bottom ends of the pressure rods 202 are hinged to the corresponding hinge supports 216. When fixing the sanitary napkin, pressing the pressing plate 201 drives the pressure rods 202 on both sides to press down the connecting plates 215 hinged thereto, and under the transmission of the inclined plate 214, the corresponding upper front end clamping plate 211 is tilted to open the clamping plate structure 210, making it convenient to place the sanitary napkin. The measuring assembly 300 includes a liquid collecting tank 301, a measuring cylinder 302 and a collecting box 303. A transmission structure 310 is provided on the left and right sides of the collecting box 303. A piston structure 320 is provided in the measuring cylinder 302. The transmission structure 310 includes a first rotating plate 311 and a second rotating plate 312. The inner side of the second rotating plate 312 is embedded in the outer wall of the corresponding side of the collecting box 303 and the two are rotatably connected. The inner side of the first rotating plate 311 and the outer side of the second rotating plate 312 are coaxially fixedly connected through a flange. A first pull rope 313 is provided on the outer edge of the first rotating plate 311, and one end of the first pull rope 313 is bonded to the outer edge of the first rotating plate 311. The first pull rope 313 is wound around the outer edge of the first rotating plate 311 so that when the first pull rope 313 is pulled, the first rotating plate 311 can rotate. The piston structure 320 includes a movable plate 321, a piston 322 and a cleaning ring 324. Transmission rods 315 are welded and fixed on the left and right sides of the movable plate 321. A second pull rope 314 is provided on the outer edge of the second rotating plate 312. One end of the second pull rope 314 is bonded and fixed to the outer edge of the second rotating plate 312, and the other end is bonded and fixed to the outer wall of the corresponding side transmission rod 315 near the top. When the pressure rod 202 is pressed to lift the clamping plate 211 on the upper side of the front end, the first pull rope 313 will be pulled upward to drive the first rotating plate 311 and the second rotating plate 312 to rotate synchronously, and then the transmission rod 315 will be pulled downward through the second pull rope 314, so that the transmission rod 315 and the movable plate 321 will slide down and drive the piston 322 to exit the measuring cylinder 302, so that the simulated liquid inside the measuring cylinder 302 flows into the collecting box 303. When the piston 322 moves downward, the cleaning ring 324 moves downward synchronously to clean the simulated liquid remaining on the inner wall of the measuring cylinder 302.

[0029] See also Figure 1-Figure 3As shown, the rear side plate 102 is vertically fixed to the rear end of the bottom plate 101 by bolts, and the front side wall of the rear side plate 102 is fixed to the side baffle 104 and the installation box 103 by bolts on the left and right sides of the top. An angle adjustment structure 220 is provided in the installation box 103, and the angle adjustment structure 220 includes a rotating rod 221 and a plurality of regularly distributed flanges 222. The right end of the rotating rod 221 is embedded in the right inner wall of the installation box 103 and the two are rotatably connected, and the left end is embedded in the right wall of the side baffle 104 and the two are rotatably connected. The rear end of the connecting tube 212 is a solid structure and the middle part is provided with flange holes 213 passing through the left and right. The rotating rod 221 passes through the two flange holes 213 in sequence, and the position of the flange 222 corresponds to the position of the flange hole 213. When the rotating rod 221 drives the flange 222 to rotate, it will drive the connecting tube 212 to rotate synchronously under the cooperation of the flange hole 213, thereby driving the front end splint structure 210 and the sanitary napkin to rotate counterclockwise to the appropriate angle for detection.

[0030] Furthermore, a handwheel 225 is provided on the top surface of the installation box 103, and a worm 224 is coaxially fixed below the handwheel 225. A worm gear 223 that meshes with each other is provided on the front side of the worm 224. The worm gear 223 is coaxially fixed to the right end of the rotating rod 221. When adjusting the angle, the tester drives the worm 224 to rotate by turning the handwheel 225, and drives the rotating rod 221 to rotate counterclockwise through the transmission of the worm gear 223. It should be noted that there is a pointer on the handwheel 225, and a scale is provided on the top surface of the installation box 103 to facilitate the tester to rotate to the appropriate angle.

[0031] See also Figure 4-Figure 7 As shown, the front end of the connecting tube 212 is a hollow structure, and the inclined plate 214 and the connecting plate 215 are both arranged in the corresponding side connecting tube 212. The two inclined plates 214 are arranged in an X-shaped cross shape. A shaft rod 217 is horizontally provided at the intersection of the two inclined plates 214. The shaft rod 217 is rotatably connected to the inclined plate 214, and a spring spring 218 is sleeved on the middle part of the shaft rod 217. When the pressing plate 201 is pressed, the inclined plate 214 connected to the connecting plate 215 at the bottom will rotate clockwise around the shaft rod 217 and compress the spring spring 218, so that the front end splint 211 will tilt up and open. After releasing the hand, the splint 211 is driven to reset by the spring spring 218.

[0032] Specifically, the rear end of the upper connecting plate 215 is welded and fixed to the front end of the solid part of the rear side of the connecting tube 212, and the bottom end of the pressure rod 202 passes downward through the corresponding outer wall of the connecting tube 212 and the upper connecting plate 215 in turn. A connecting sleeve 219 is fixed to the rear end of the lower connecting plate 215, and the front end of the hinge support 216 is slidably connected to the connecting sleeve 219. The bottom end of the pressure rod 202 is hinged to the hinge support 216. When the pressure rod 202 drives the bottom connecting plate 215 to rotate, the hinge support 216 will slide in the connecting sleeve 219. By setting the connecting sleeve 219, it is avoided that when the connecting plate 215 rotates, the distance between the hinge support 216 and the connecting plate 215 cannot be increased, which makes the entire device unusable.

[0033] See also Figures 8-10 As shown, the liquid collecting tank 301 is installed in the middle of the bottom plate 101. The coverage range of the opening of the liquid collecting tank 301 is larger than the test range of the sanitary napkin, which prevents the unabsorbed simulated liquid from falling directly on the periphery and affecting the accuracy of the permeability performance test. The middle of the bottom surface of the liquid collecting tank 301 is connected with the top of the measuring cylinder 302, and the bottom end of the measuring cylinder 302 is connected with the middle of the top surface of the collection box 303. The piston 322 is in the shape of a cone with a small diameter at the upper part and a large diameter at the lower part. The middle diameter of the piston 322 is the same as the inner diameter of the bottom opening of the measuring cylinder 302. The bottom surface of the piston 322 is fixed to the middle of the top surface of the movable plate 321, so that the piston 322 can block the bottom end of the measuring cylinder 302 to prevent the simulated liquid from flowing into the collection box 303 when the volume is read during the test. It should be noted that a drain port is provided on the rear side wall of the collection box 303 to facilitate the discharge of the collected simulated liquid.

[0034] In addition, a vertical rod 323 is welded and fixed above the top surface of the piston 322, and the top of the vertical rod 323 is welded and fixed to the cleaning ring 324. The outer wall of the cleaning ring 324 fits the inner wall of the measuring cylinder 302. A rope ring 203 is welded and fixed to the top surface of the upper clamping plate 211 near the front end. The upper end of the first pull rope 313 is tied to the corresponding rope ring 203. When the piston 322 moves downward, the cleaning ring 324 moves downward synchronously to clean the simulated liquid remaining on the inner wall of the measuring cylinder 302, which is not only convenient to use, but also avoids the residual simulated liquid. It affects the next test. It should be noted that the diameter of the second rotating plate 312 is larger than the diameter of the first rotating plate 311, so that when the first rotating plate 311 rotates a small angle, the second rotating plate 312 can pull the transmission rod 315 downward by the second pull rope 314 to slide a sufficient distance, thereby avoiding the cleaning ring 324 moving too small a distance and failing to completely clean the measuring cylinder 302. At the same time, the distance between the cleaning ring 324 and the piston 322 is greater than or equal to the distance the cleaning ring 324 slides down, thereby avoiding the cleaning ring 324 and the measuring cylinder 302 from separating.

[0035] More specifically, a number of regularly distributed limit rods 325 are provided between the upper and lower top surfaces of the collecting box 303. The limit rods 325 pass through the same movable plate 321 and the two are slidably connected. The outer wall portion of the limit rod 325 between the inner bottom surface of the collecting box 303 and the bottom surface of the movable plate 321 is sleeved with a spring 326. The elastic force of the spring 326 pushes up the movable plate 321, thereby driving the piston 322 to tightly press against the bottom opening of the measuring cylinder 302, and the top end of the transmission rod 315 passes through the top surface of the collecting box 303.

[0036] The present invention also provides a method for testing the permeability of a dry sanitary napkin having a high molecular weight water absorption factor during production, using the above-mentioned device for testing the permeability of a dry sanitary napkin having a high molecular weight water absorption factor during production, comprising the following steps: S1. The tester presses the pressing plate 201 with one hand, and presses the connecting plate 215 hinged to it through the pressing rod 202, so that the clamping plate 211 on the upper side of the front end is tilted up and the clamping structure 210 is opened. Then, with the other hand, the tester aligns the two ends of the sanitary napkin with the clamping structures 210 on both sides and places it; S2. After placement is completed, the tester rotates the hand wheel 225, which drives the rotating rod 221 through the transmission of the worm 224 and the worm gear 223. In turn, the flange 222 and the flange hole 213 cooperate to drive the connecting tube 212 and the clamping plate 211 to rotate counterclockwise, so that the sanitary napkin is tilted with the front lower and the back higher; S3. After adjusting the angle appropriately, the tester pours a volume of simulated liquid, M0, onto the sanitary napkin. A portion of the simulated liquid is quickly absorbed by the sanitary napkin, while the remaining portion slides down into the liquid collecting groove 301 and flows into the graduated cylinder 302. The volume of simulated liquid in the graduated cylinder 302 is read as M1. The absorbed volume of simulated liquid, M2, equals M0 - M1, and the slippage rate is then calculated. S4. After the test is completed, the tester turns the hand wheel 225 to make the sanitary napkin level again, and then presses the pressure rod 202 again to make the clamping plate 211 on the upper side of the front end tilt up and pull the first pull rope 313 upward to drive the first rotating plate 311 and the second rotating plate 312 to rotate synchronously, and then pulls the transmission rod 315 downward through the second pull rope 314 to make the transmission rod 315 and the movable plate 321 slide down and drive the piston 322 to exit the measuring cylinder 302, so that the simulated liquid inside the measuring cylinder 302 flows into the collection box 303. When the piston 322 moves downward, the cleaning ring 324 moves downward synchronously to clean the simulated liquid remaining on the inner wall of the measuring cylinder 302.

[0037] The foregoing descriptions of specific exemplary embodiments of the present invention are for purposes of illustration and description. These descriptions are not intended to limit the invention to the precise forms disclosed, and it is apparent that many variations and modifications are possible in light of the foregoing teachings. The exemplary embodiments have been selected and described for the purpose of explaining the specific principles of the invention and their practical application, thereby enabling those skilled in the art to make and utilize a variety of exemplary embodiments of the invention and various options and modifications. The scope of the invention is intended to be defined by the description and its equivalents.

Claims

1. A device for testing the permeability of a high molecular weight water absorption factor dry sanitary napkin during production, comprising a support assembly (100), the support assembly (100) comprising a bottom plate (101) and a rear side plate (102), characterized in that: A clamping assembly (200) is provided on the front side of the rear side plate (102), and a measuring assembly (300) is provided on the bottom plate (101); The clamping assembly (200) includes two left and right clamping plate structures (210), a pressing plate (201) and two pressure rods (202). The clamping plate structure (210) includes two upper and lower clamping plates (211) and a connecting tube (212). The rear end of the clamping plate (211) is fixed with an inclined plate (214). The rear end of the inclined plate (214) is fixed with a connecting plate (215). The rear end of the lower connecting plate (215) is slidably connected with a hinge support (216). The two pressure rods (202) are respectively fixed to the left and right ends of the bottom surface of the pressing plate (201). The bottom ends of the pressure rods (202) are hinged to the corresponding hinge supports (216). The measuring assembly (300) includes a liquid collecting tank (301), a measuring cylinder (302) and a collecting box (303). The collecting box (303) is provided with a transmission structure (310) on the left and right sides. The measuring cylinder (302) is provided with a piston structure (320). The transmission structure (310) includes a first rotating plate (311) and a second rotating plate (312). The inner side of the second rotating plate (312) is rotatably connected to the outer wall of the corresponding side of the collecting box (303). The inner side of the first rotating plate (311) is coaxially fixedly connected to the outer side of the second rotating plate (312). The outer edge of the first rotating plate (311) is provided with a first pull Rope (313), one end of the first pull rope (313) is fixed to the outer edge of the first rotating plate (311), and the other end is fixed to the front end of the top of the clamping plate (211) on the corresponding side. The piston structure (320) includes a movable plate (321), a piston (322) and a cleaning ring (324). Transmission rods (315) are fixed on the left and right sides of the movable plate (321). A second pull rope (314) is provided on the outer edge of the second rotating plate (312). One end of the second pull rope (314) is fixed to the outer edge of the second rotating plate (312), and the other end is fixed to the outer wall of the transmission rod (315) on the corresponding side near the top.

2. The permeability testing device for the production of high molecular weight dry sanitary napkins according to claim 1, characterized in that: The rear side plate (102) is vertically fixed to the rear end of the bottom plate (101), and side baffles (104) and an installation box (103) are respectively fixed on the left and right sides of the front side wall of the rear side plate (102) near the top.

3. The permeability testing device for the production of high molecular weight dry sanitary napkins according to claim 2, characterized in that: An angle adjustment structure (220) is provided in the installation box (103), and the angle adjustment structure (220) includes a rotating rod (221) and a plurality of regularly distributed flanges (222). The right end of the rotating rod (221) is rotatably connected to the right inner wall of the installation box (103), and the left end is rotatably connected to the right wall of the side baffle (104). The rear end of the connecting tube (212) is a solid structure and a flange hole (213) is provided in the middle thereof, which passes through the two flange holes (213) in sequence. The position of the flange (222) corresponds to the position of the flange hole (213).

4. The permeability testing device for the production of a high molecular weight water absorption factor dry sanitary napkin according to claim 3, characterized in that: A hand wheel (225) is provided on the top surface of the installation box (103), a worm (224) is coaxially fixed below the hand wheel (225), a worm wheel (223) is provided on the front side of the worm wheel (224) and meshes with each other, and the worm wheel (223) is coaxially fixed to the right end of the rotating rod (221).

5. The permeability testing device for the production of high molecular weight dry sanitary napkins according to claim 4, characterized in that: The front end of the connecting tube (212) is a hollow structure. The inclined plate (214) and the connecting plate (215) are both arranged in the connecting tube (212) on the corresponding side. The two inclined plates (214) are arranged in an X-shaped cross pattern. A shaft (217) is horizontally provided at the intersection of the two inclined plates (214). The shaft (217) is rotatably connected to the inclined plates (214). A spring spring (218) is sleeved on the middle of the shaft (217).

6. The permeability testing device for the production of high molecular weight dry sanitary napkins according to claim 5, characterized in that: The rear end of the upper connecting plate (215) is fixed to the front end of the solid part on the rear side of the connecting tube (212), the bottom end of the pressure rod (202) passes downward through the corresponding outer wall of the connecting tube (212) and the upper connecting plate (215) in sequence, and a connecting sleeve (219) is fixed to the rear end of the lower connecting plate (215), the front end of the hinge support (216) is slidably connected to the connecting sleeve (219), and the bottom end of the pressure rod (202) is hinged to the hinge support (216).

7. The permeability testing device for the production of high molecular weight dry sanitary napkins according to claim 6, characterized in that: The liquid collecting tank (301) is installed in the middle of the bottom plate (101), the middle of the bottom surface of the liquid collecting tank (301) is connected to the top of the measuring cylinder (302), and the bottom end of the measuring cylinder (302) is connected to the middle of the top surface of the collecting box (303). The piston (322) is in the shape of a truncated cone with a small diameter at the top and a large diameter at the bottom. The middle diameter of the piston (322) is the same as the inner diameter of the bottom opening of the measuring cylinder (302). The bottom surface of the piston (322) is fixed to the middle of the top surface of the movable plate (321).

8. The permeability testing device for the production of high molecular weight dry sanitary napkins according to claim 7, characterized in that: A vertical rod (323) is fixed above the top surface of the piston (322), the top end of the vertical rod (323) is fixed to the cleaning ring (324), the outer wall of the cleaning ring (324) is in contact with the inner wall of the measuring cylinder (302), a rope ring (203) is fixed to the top surface of the upper clamping plate (211) near the front end, and the upper end of the first pull rope (313) is tied to the corresponding rope ring (203).

9. The permeability testing device for the production of high molecular weight water absorption factor dry sanitary napkins according to claim 8, characterized in that: A plurality of regularly distributed limiting rods (325) are provided between the upper and lower top surfaces of the collection box (303); the limiting rods (325) pass through the same movable plate (321) and the two are slidably connected; a spring (326) is sleeved on the outer wall portion of the limiting rod (325) located between the inner bottom surface of the collection box (303) and the bottom surface of the movable plate (321); and the top end of the transmission rod (315) passes through the top surface of the collection box (303).

10. A method for testing the permeability of a dry sanitary napkin with a high molecular weight water absorption factor during production, using the device for testing the permeability of a dry sanitary napkin with a high molecular weight water absorption factor during production as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1. The tester presses the pressing plate (201) with one hand, and presses the connecting plate (215) hinged to it through the pressing rod (202), so that the clamping plate (211) on the upper side of the front end is tilted up and the clamping plate structure (210) is opened. Then, the tester uses the other hand to align the two ends of the sanitary napkin with the clamping plate structures (210) on both sides and place it; S2. After placement is completed, the tester rotates the hand wheel (225), which drives the rotating rod (221) to rotate through the transmission of the worm (224) and the worm wheel (223), and then drives the connecting tube (212) and the clamping plate (211) to rotate counterclockwise under the cooperation of the flange (222) and the flange hole (213), so that the sanitary napkin is tilted with the front lower and the back higher; S3. After the angle is adjusted appropriately, the tester pours a volume of simulated liquid M0 onto the sanitary napkin. A portion of the simulated liquid is quickly absorbed by the sanitary napkin, and the other portion slides down to the liquid collecting tank (301) and flows into the graduated cylinder (302). The volume of the simulated liquid in the graduated cylinder (302) is read as M1. The volume of the absorbed simulated liquid M2 = M0 - M1, and the slippage rate can be obtained. S4. After the test is completed, the tester rotates the hand wheel (225) to level the sanitary napkin again, and then presses the pressure rod (202) again to tilt the clamping plate (211) on the upper side of the front end and pulls the first pull rope (313) upward to drive the first rotating plate (311) and the second rotating plate (312) to rotate synchronously, and then pulls the transmission rod (315) downward through the second pull rope (314), so that the transmission rod (315) and the movable plate (321) slide down and drive the piston (322) to exit the measuring cylinder (302), so that the simulated liquid inside the measuring cylinder (302) flows into the collection box (303). When the piston (322) moves downward, the cleaning ring (324) moves downward synchronously to clean the simulated liquid remaining on the inner wall of the measuring cylinder (302).

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