All-cotton sanitary product surface layer, preparation device and preparation method thereof

Abstract

The application discloses a full-cotton sanitary product surface layer, a preparation device and a preparation method thereof, and relates to the technical field of sanitary product preparation. The device comprises a bottom plate, a driving structure and a surface turning structure. The bottom plate, the feeding conveying frame, the discharging conveying frame, the control box and the surface turning structure are combined and arranged in sequence along the material conveying direction. The controller is electrically connected with the driving structure to control the start-stop and operation conditions. The meshing transmission of the worm gear, the worm and the gear one with the transmission rod is matched with the meshing connection of the rack two and the gear one in the surface turning structure, so that the synchronous driving of the clamping, the turning and the discharging actions by a single driving source is realized, the transmission chain is simplified, and the control complexity is reduced.

Description

Technical Field

[0001] This invention relates to the field of hygiene product preparation technology, specifically to the surface layer of all-cotton hygiene products, preparation apparatus, and preparation method. Background Technology

[0002] During the manufacturing process of 100% cotton sanitary products, the front and back sides typically require differentiated treatment (such as applying different functional finishing agents), necessitating a flipping operation between processes. Various devices for flipping sheet materials already exist in the current technology.

[0003] Common sheet material turning devices typically include a conveying mechanism for receiving the material, a clamping mechanism for holding the material, and a turning drive mechanism for driving the entire sheet material to turn. The working process is generally as follows: the material is fed into the clamping station by the conveying mechanism, the clamping mechanism clamps and secures the material, then the turning drive mechanism drives the entire clamping part to turn, completing the turning process. After turning, the clamping mechanism releases the material, and finally, the conveying mechanism delivers the turned material out.

[0004] However, during the clamping stage, the material relies entirely on the pushing force of the external conveying mechanism to enter the clamping station. Once the clamping mechanism closes, the material loses its active conveying force, which can easily lead to problems such as incomplete clamping or material deviation. During the discharge stage, after the clamping mechanism is released, the material needs to rely on the subsequent pushing mechanism or gravity to enter the discharge conveyor belt, resulting in poor discharge smoothness. Summary of the Invention

[0005] The purpose of this invention is to provide a cotton hygiene product surface layer, a preparation device, and a preparation method thereof to solve the problems in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A device for preparing the surface layer of all-cotton sanitary products, characterized in that it includes a base plate, a driving structure, and a flipping structure; Along the material conveying direction, the upper end of the base plate is sequentially equipped with a feeding conveyor, a control box, and a discharging conveyor; the discharging side of the feeding conveyor and the feeding side of the discharging conveyor are respectively connected to the feeding side and the discharging side of the flipping structure; the flipping structure is located on the upper end of the base plate and between the feeding conveyor and the discharging conveyor. The control box contains a controller, which is electrically connected to the drive structure and is used to control the start-up, shutdown, and operating conditions of the drive structure. The drive structure is located at the upper end of the control box and is used to provide the flipping power for the flipping structure; The drive structure includes a motor, a worm gear, a worm, a gear, and a transmission rod; the motor is mounted on the upper end of the control box, the worm gear is fixedly connected to the output end of the motor, the worm is meshed with the worm gear, and the worm and gear are coaxially fixed on the transmission rod; The flipping structure includes a housing component, a transmission component, and a clamping and conveying component; The transmission component includes a rack two, and the gear one meshes with the rack two. The clamping and conveying component is assembled inside the housing component. The clamping and conveying component includes two sets of linkage assemblies symmetrically distributed front and rear and two sets of clamping and transporting assemblies symmetrically distributed top and bottom. The transmission component is slidably assembled on the housing component. One end of the transmission component is connected to the drive structure, and the other end is connected to the two sets of linkage assemblies of the clamping and conveying component.

[0007] Based on the above technical solutions, the present invention also provides the following optional technical solutions: Optionally, the housing component includes a first shell plate, two second shell plates symmetrically distributed front and back, and two third shell plates symmetrically distributed back and forth; The housing component has a sliding opening through the middle of it for a sliding assembly transmission component; Two shell plates are symmetrically fixed on both sides of one end of the shell component, and transverse sliding grooves are provided at the opposite ends of the two shell plates. Each shell plate two is fixed with a shell plate three at the end away from the shell plate one. Both shell plates three are provided with longitudinal sliding grooves at opposite ends. A guide rod is fixed to the inner wall of the two longitudinal sliding grooves on the same side. A rack one is fixed to the inner wall of the other longitudinal sliding groove on the same side. The guide rod and rack one are connected to the clamping and transporting assembly of the clamping and transporting component. Detectors are installed on the opposite sides of the two shell plates three away from shell plate two, and the detectors are electrically connected to the controller inside the control box; contact wheels are installed on the outer walls of the two shell plates three.

[0008] Optionally, the transmission component includes a sliding block, a rack and pinion, and a push plate; The outer wall of the sliding strip is slidably engaged with the inner wall of the sliding opening of the shell plate. One end of the sliding strip extends into the shell component and is fixedly connected to the push plate. The lower end of the sliding strip is provided with an installation groove along its length. The rack two is fixed in the mounting groove, and the height of the rack two is less than the depth of the mounting groove; The front and rear ends of the push plate are respectively fixedly connected to two sliding plates via two connecting shafts. The front and rear ends of the push plate are connected to two sets of connecting rod assemblies that hold the conveying component via two connecting shafts. The sliding plates on each side are correspondingly slidably assembled in the transverse sliding groove on the same side.

[0009] Optionally, two sets of clamping and transporting components are provided between the two sets of linkage assemblies, each set of linkage assemblies including two first links, two second links and two sets of transmission units arranged symmetrically in the upper and lower parts. The same end of each of the two connecting rods is hinged to the connecting shaft connecting the push plate and the sliding plate, and the other side of each of the two connecting rods is respectively hinged to the same end of the corresponding connecting rod; the middle parts of the two connecting rods are hinged to each other. Each transmission unit includes two connecting rods three, with one end of the two connecting rods three hinged together, and the other end of the two connecting rods three respectively hinged to the body of the two connecting rods two via connecting shafts, and located between the middle and end of the connecting rods two.

[0010] Optionally, each set of the clamping and transport assembly includes an active idler roller, a belt, and two driven idler rollers; The belt is sleeved on the outside of the driving idler and the two driven idlers; The driven roller and the driving roller are respectively straddled and assembled between the front and rear sets of connecting rod assemblies, and the two ends of the driven roller are respectively hinged to the two ends of the connecting rods of the two sets of connecting rod assemblies; The active roller is hinged at both ends to the ends of two connecting rods three in two sets of connecting rod assemblies; one end of the active roller extends into the longitudinal sliding groove of a shell plate three and is fixedly connected to a gear two; the other end of the active roller extends into the longitudinal sliding groove of a shell plate three and is rotatably connected to a guide block. The second gear meshes with the first rack in the longitudinal sliding groove; the guide block has a guide groove at one end near the guide rod, and the guide block slides with the guide rod through the guide groove.

[0011] Optionally, the upper end of the control box has two fixed lugs (first type) fixedly distributed on the left and right sides, and the worm gear is rotatably installed between the two fixed lugs (first type); the upper end of the control box has two fixed lugs (second type) fixedly distributed at the front and rear, and the transmission rod is rotatably installed between the two fixed lugs (second type). The motor is electrically connected to the controller inside the control box.

[0012] Optionally, the upper end of the base plate is symmetrically fixed with a discharge limit seat and a feed limit seat. The discharge limit seat is located between the discharge conveyor and the control box, and the feed limit seat is located between the feed conveyor and the control box. Two limiting plates are symmetrically fixed at the upper end of the base plate. Each of the two limiting plates has an arc-shaped opening on its inner side. The arc-shaped opening cooperates with the contact wheel of the housing component. The arc-shaped opening is arranged according to the flipping motion trajectory of the flipping structure.

[0013] The method for preparing the surface layer of all-cotton sanitary products, using the aforementioned apparatus for preparing the surface layer of all-cotton sanitary products, includes the following steps: S1: Feeding step, the cotton sanitary product surface to be turned is conveyed to the feeding side of the turning structure via the feeding conveyor frame, and enters between the two sets of clamping and transporting components of the clamping conveyor; after the detector detects that the material is in place, it transmits the signal to the controller in the control box; S2: Clamping step, the controller starts the drive structure, and the motor drives gear one to rotate in the opposite direction through the worm gear, worm and transmission rod; at this time, rack two is above gear one, and gear one drives rack two to slide the push plate to the left. The push plate drives two sets of clamping and transporting components that are symmetrically distributed up and down to move towards each other through two sets of connecting rod assemblies; at the same time, during the process of the two sets of connecting rod assemblies moving towards each other, gear two meshes with rack one in the longitudinal sliding groove, driving the active idler roller to rotate, so that the belt running direction is the same as the running direction of the feeding conveyor, and further bringing the material into the clamping and transporting components to complete the clamping and fixing; S3: Flipping step. After the push plate slides to the left to the limit position, gear one continues to rotate in the opposite direction. The friction generated by the meshing contact between gear one and rack two drives the entire flipping structure to flip. At the same time, the contact wheel moves along the arc-shaped trajectory of the limiting plate. After the flipping is completed, rack two is located below gear one, completing the flipping action of the cotton sanitary product surface layer. S4: Discharge step. After the flipping is completed, the controller controls the motor to rotate in the forward direction. At this time, rack two is located below gear one. Gear one drives rack two to slide the push plate to the left. The push plate drives two sets of clamping and transporting components that are symmetrically distributed above and below to move away from each other through two sets of linkage assemblies. At the same time, during the separation of the two sets of linkage assemblies, gear two meshes with rack one in the longitudinal sliding groove, driving the active roller to rotate, so that the belt running direction is the same as the running direction of the discharge conveyor, pushing the flipped cotton sanitary product surface to the discharge conveyor for output.

[0014] The all-cotton sanitary product surface layer is obtained by turning over a pure cotton spunlace nonwoven fabric substrate using the aforementioned preparation device.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention utilizes a combination layout of a base plate, a feeding conveyor, a discharging conveyor, a control box, and a flipping structure, which are sequentially connected along the material conveying direction. The controller is electrically connected to the drive structure to control the start-stop and operating conditions. The meshing transmission of the worm gear, worm, gear one, and transmission rod in the drive structure, along with the meshing connection of rack two and gear one in the flipping structure, enables a single drive source to synchronously drive the clamping, flipping, and discharging actions, simplifying the transmission chain and reducing control complexity.

[0016] 2. The internal transmission component of the flipping structure of the present invention is slidably assembled on the housing component. One end of the component is connected to the drive structure, and the other end is connected to two sets of linkage assemblies. The two sets of linkage assemblies drive the upper and lower clamping and transporting components to move towards each other or away from each other. In the clamping and transporting components, the active roller drives the belt to run through the meshing of gear two and rack one. During the clamping stage, the belt runs in the same direction as the feeding conveyor to assist feeding. During the discharging stage, the belt runs in the same direction as the discharging conveyor to assist discharging, thus realizing the integration of clamping and conveying functions.

[0017] 3. This invention drives the overall flipping structure to flip by the relative position change of gear one and rack two. The contact wheel moves along the arc-shaped trajectory of the limiting plate to ensure the flipping path. The self-locking characteristic of the worm gear keeps the posture stable after flipping. With the signal feedback of the detector, the entire process of feeding, clamping, flipping and discharging is automated, which improves the efficiency and consistency of the surface flipping process. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention excluding the limiting plate.

[0019] Figure 2 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 3 This is a schematic diagram of the transmission components of the driving structure and flipping structure of the present invention.

[0021] Figure 4 This is a schematic diagram of the shell component of the flip-up structure of the present invention.

[0022] Figure 5 This is a schematic diagram of the flipping structure of the present invention.

[0023] Figure 6 This is a schematic diagram of the clamping and conveying component of the flipping structure of the present invention.

[0024] Attached diagram annotations: 1. Base plate; 11. Feed conveyor frame; 12. Discharge conveyor frame; 13. Feed limit seat; 14. Discharge limit seat; 15. Control box; 16. Limiting plate; 161. Arc-shaped opening; 2. Drive structure; 21. Motor; 22. Worm gear; 221. Fixed lug one; 23. Worm; 24. Gear one; 25. Transmission rod; 251. Fixed lug two; 3. Flip-over structure; 31. Housing component; 311. Housing plate one; 3111. Sliding port; 312. Housing plate two; 3121. Transverse sliding groove; 313. Housing plate three; 3131. Longitudinal sliding groove; 3132. Guide rod; 3133. Rack one; 3134. Contact wheel; 314. Detector; 32. Transmission component; 321. Sliding bar; 3211. Mounting groove; 322. Rack II; 323. Push plate; 3231. Sliding plate; 33. Clamping conveyor; 331. Connecting rod one; 332. Connecting rod two; 333. Driven idler roller; 334. Connecting rod three; 335. Driven idler roller; 3351. Gear two; 3352. Guide block; 33521. Guide groove; 336. Belt. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0026] In one embodiment, such as Figures 1-6 As shown, the apparatus for preparing the surface layer of all-cotton sanitary products is characterized by comprising a base plate 1, a driving structure 2, and a flipping structure 3. Along the material conveying direction, a feeding conveyor 11, a control box 15, and a discharging conveyor 12 are sequentially installed on the upper end of the base plate 1; the discharging side of the feeding conveyor 11 and the feeding side of the discharging conveyor 12 are respectively connected to the feeding side and the discharging side of the flipping structure 3; the flipping structure 3 is located on the upper end of the base plate 1 and between the feeding conveyor 11 and the discharging conveyor 12; The control box 15 is equipped with a controller, which is electrically connected to the drive structure 2 and is used to control the start-up, stop and operation of the drive structure 2. The drive structure 2 is located at the upper end of the control box 15 and is used to provide the flipping power for the flipping structure 3. The drive structure 2 includes a motor 21, a worm gear 22, a worm 23, a gear 24, and a transmission rod 25; the motor 21 is mounted on the upper end of the control box 15, the worm gear 22 is fixedly connected to the output end of the motor 21, the worm 23 is meshed with the worm gear 22, and the worm 23 and the gear 24 are coaxially fixed on the transmission rod 25. The flipping structure 3 includes a housing 31, a transmission component 32, and a clamping and conveying component 33; The transmission component 32 includes a rack 322, and the gear 24 meshes with the rack 322. The clamping and conveying component 33 is assembled inside the housing component 31. The clamping and conveying component 33 includes two sets of connecting rod assemblies symmetrically distributed front and back and two sets of clamping and transporting assemblies symmetrically distributed top and bottom. The transmission component 32 is slidably assembled on the housing component 31. One end of the transmission component 32 is connected to the drive structure 2, and the other end is connected to the two sets of connecting rod assemblies of the clamping and conveying component 33.

[0027] In this embodiment, when the device is running, the surface to be flipped is fed by the feeding conveyor 11 to the feeding side of the flipping structure 3 and enters between the two sets of clamping and transporting components. The controller starts the motor 21, which drives the first gear 24 to rotate in the reverse direction through the worm gear 22, worm 23 and transmission rod 25. At this time, the second rack 322 is located above the first gear 24. The first gear 24 drives the second rack 322 to slide the push plate 323 to the left. Through the two sets of connecting rods, the two sets of clamping and transporting components move towards each other to clamp the material. After the push plate 323 slides to the limit position, the first gear 24 continues to rotate in the reverse direction. Through the meshing driving force, the entire flipping structure 3 flips. Then the controller controls the motor 21 to rotate in the forward direction. The second rack 322 is located below the first gear 24. The first gear 24 drives the second rack 322 to slide the push plate 323 to the left. Through the two sets of connecting rods, the two sets of clamping and transporting components move away from each other, pushing the flipped material to the discharge conveyor 12 for output. Because the transmission between the worm gear 22 and the worm 23 has a self-locking characteristic, the flipping structure 3 can reliably maintain its flipped posture after flipping.

[0028] In one embodiment, the housing component 31 includes a first housing plate 311, two second housing plates 312 symmetrically distributed front and back, and two third housing plates 313 symmetrically distributed. The housing 31 has a sliding opening 3111 through which the sliding assembly transmission component 32 is provided; Two shell plates 312 are symmetrically fixed on both sides of one end of the shell component 31, and transverse sliding grooves 3121 are provided at the opposite ends of the two shell plates 312. Each shell plate 2 312 has a shell plate 313 fixed at one end away from shell plate 1 311. Both shell plates 313 have longitudinal sliding grooves 3131 at their opposite ends. A guide rod 3132 is fixed to the inner wall of the two longitudinal sliding grooves 3131 on the same side. A rack 1 3133 is fixed to the inner wall of the two longitudinal sliding grooves 3131 on the other side. The guide rod 3132 and rack 1 3133 are connected to the clamping and transporting assembly of the clamping and transporting component 33. A detector 314 is installed on the opposite side of the two shell plates 313 away from the shell plate 312. The detector 314 is electrically connected to the controller inside the control box 15. A contact wheel 3134 is installed on the outer wall of the two shell plates 313.

[0029] The detector 314 is electrically connected to the controller inside the control box 15 and is used to detect whether the material is in place.

[0030] The contact wheel 3134 cooperates with the arc-shaped opening 161 of the limiting plate 16 on the base plate 1, and plays a guiding and limiting role when the flipping structure 3 flips.

[0031] The housing 31 serves as a supporting frame, providing an assembly reference for the transmission component 32 and the clamping and conveying component 33. The transverse sliding groove 3121 on the second housing plate 312 provides a guide track for the sliding plates 3231 at both ends of the push plate 323. The longitudinal sliding groove 3131 on the third housing plate 313 provides a longitudinal motion guide space for the active idler roller 335. The cooperation between the contact wheel 3134 and the arc-shaped opening 161 causes the flipping structure 3 to flip along a predetermined trajectory.

[0032] In one embodiment, the transmission component 32 includes a sliding block 321, a rack 322, and a push plate 323; The outer wall of the sliding block 321 is slidably engaged with the inner wall of the sliding opening 3111 of the shell plate 311. One end of the sliding block 321 extends into the shell component 31 and is fixedly connected to the push plate 323. The lower end of the sliding block 321 is provided with an installation groove 3211 along its length. The rack 322 is fixed in the mounting groove 3211, and the height of the rack 322 is less than the depth of the mounting groove 3211. The front and rear ends of the push plate 323 are respectively fixedly connected to two sliding plates 3231 through two connecting shafts. The front and rear ends of the push plate 323 are connected to two sets of connecting rod assemblies that hold the conveying component 33 through two connecting shafts. The sliding plates 3231 on each side are correspondingly slidably assembled in the transverse sliding groove 3121 on the same side.

[0033] When gear 24 rotates in the reverse direction, rack 322 is positioned above gear 24. Gear 24 drives rack 322 to slide sliding block 321 to the left within sliding opening 3111, thereby pushing push plate 323 to move to the left. Push plate 323, through connecting shaft, pushes two sets of linkage assemblies to bring the two sets of clamping and transporting components closer together. When push plate 323 slides to its limit position, the teeth of gear 24 remain engaged with rack 322. At this point, gear 24 continues to rotate in the reverse direction. Since rack 322 can no longer move to the left, the driving force continuously transmitted between gear 24 and rack 322 is converted into a torque that drives the entire flipping structure 3 to flip. This transmission component 32 has a compact structure, converting the rotational motion of drive structure 2 into the linear motion of push plate 323, and then into the clamping and separating action of clamping and transporting components through linkage assembly. At the same time, the flipping action is achieved by utilizing the relative position change between rack 322 and gear 24, realizing the coordinated operation of multiple actions.

[0034] In one embodiment, two sets of clamping and transporting assemblies are provided between the two sets of linkage assemblies, and each set of linkage assemblies includes two connecting rods 331, two connecting rods 332, and two sets of transmission units arranged symmetrically in the upper and lower dimensions. The two connecting rods 331 are hinged at the same end to the connecting shaft connecting the push plate 323 and the sliding plate 3231, and the other side of the two connecting rods 331 is respectively hinged to the same end of the corresponding connecting rod 332; the two connecting rods 332 are hinged to each other in the middle. Each transmission unit includes two connecting rods 334. One end of the two connecting rods 334 is hinged together, and the other end of the two connecting rods 334 is respectively hinged to the body of the two connecting rods 332 through connecting shafts, and is located between the middle and end of the connecting rods 332.

[0035] Since rack 222 is positioned above gear 24 at this time, gear 24 rotates in the reverse direction, driving rack 222 to slide push plate 323 to the left. The sliding of push plate 323 drives two connecting rods 331 to move via connecting shaft, and the two connecting rods 331 in turn drive the two connecting rods 332 to rotate around their central hinge point. Since the two connecting rods 332 are hinged together at their central points, when push plate 323 slides to the left, one end of the two connecting rods 332 moves closer to each other under the push of connecting rod 331, and the other end also moves closer, thereby driving the upper and lower clamping and conveying components to move towards each other in the vertical direction, thus achieving the clamping of materials. Simultaneously, connecting rod 334, hinged to the body of connecting rod 2 332, also moves. One end of the two connecting rods 334 is hinged to each other and connected to the end of the active roller 335. During the rotation of connecting rod 2 332, the hinged ends of the two connecting rods 334 slide along the longitudinal sliding groove 3131 of shell plate 313, driving the active roller 335 to move up and down within the longitudinal sliding groove 3131. This linkage mechanism allows the two sets of clamping and conveying components to move synchronously and symmetrically together or apart, ensuring that the material is subjected to uniform force during clamping and avoiding material wrinkling or displacement caused by uneven force.

[0036] In one embodiment, each set of the clamping and transporting components includes an active idler roller 335, a belt 336, and two driven idler rollers 333; The belt 336 is sleeved on the outside of the driving idler 335 and the two driven idlers 333; The driven roller 333 and the driving roller 335 are respectively straddled and assembled between the front and rear sets of connecting rod assemblies, and the two ends of the driven roller 333 are respectively hinged to the ends of the connecting rods 332 of the two sets of connecting rod assemblies. The active roller 335 is respectively hinged at both ends to the ends of two connecting rods 334 in two sets of connecting rod assemblies; one end of the active roller 335 extends into the longitudinal sliding groove 3131 of a shell plate 313 and is fixedly connected to the gear 2 3351; the other end of the active roller 335 extends into the longitudinal sliding groove 3131 of a shell plate 313 and is rotatably connected to the guide block 3352. The gear 2 3351 is meshed with the rack 1 3133 in the longitudinal sliding groove 3131; the guide block 3352 has a guide groove 33521 at one end near the guide rod 3132, and the guide block 3352 slides with the guide rod 3132 through the guide groove 33521.

[0037] When the two sets of linkage assemblies approach each other, the upper and lower sets of active rollers 335 move closer to each other in the vertical direction. The gear 2 3351 rotates along the rack 1 3133, causing the active rollers 335 to rotate. This makes the running direction of the belt 336 the same as the running direction of the feeding conveyor 11, further bringing the material into the clamping and conveying assembly. After flipping, when the two sets of linkage assemblies move away from each other, the upper and lower sets of active rollers 335 move away from each other. The gear 2 3351 rolls in the opposite direction, making the running direction of the belt 336 the same as the running direction of the discharge conveyor 12, pushing the flipped material towards the discharge conveyor 12.

[0038] In one embodiment, two fixed lugs 221 are fixedly distributed on the left and right sides of the upper end of the control box 15, and the worm gear 22 is rotatably installed between the two fixed lugs 221; two fixed lugs 251 are fixedly distributed on the front and back of the upper end of the control box 15, and the transmission rod 25 is rotatably installed between the two fixed lugs 251. The motor 21 is electrically connected to the controller inside the control box 15.

[0039] Motor 21 is mounted on the upper part of control box 15 and is electrically connected to the controller inside control box 15. The controller controls the starting, stopping, direction, and speed of motor 21. Motor 21 can be a servo motor to provide angular displacement control and stable speed output, ensuring precise and reliable transitions between different positions of the flipping structure 3. The fixed lug 1 221 and fixed lug 251 provide stable rotational support for worm gear 22 and transmission rod 25, ensuring proper coordination between the components of drive structure 2. Worm gear 22 is fixedly connected to the output end of motor 21. After motor 21 starts, it drives worm gear 22 to rotate, which in turn drives the meshing worm 23 to rotate. The worm 23 transmits power to gear 1 24 via transmission rod 25.

[0040] In one embodiment, the upper end of the base plate 1 is symmetrically fixed with a discharge limiting seat 14 and a feed limiting seat 13. The discharge limiting seat 14 is located between the discharge conveyor frame 12 and the control box 15, and the feed limiting seat 13 is located between the feed conveyor frame 11 and the control box 15. Two limiting plates 16 are symmetrically fixed at the upper end of the base plate 1. Each of the two limiting plates 16 has an arc-shaped opening 161 on its inner side. The arc-shaped opening 161 cooperates with the contact wheel 3134 of the housing 31. The arc-shaped opening 161 is arranged according to the flipping motion trajectory of the flipping structure 3.

[0041] The flipping structure 3 rotates around the axis of gear 24, and the trajectory of the arc-shaped opening 161 follows an arc path centered on the axis of gear 24. During the flipping of the structure 3, the contact wheel 3134 rolls along the arc-shaped opening 161. The shape of the arc-shaped opening 161 restricts the flipping path of the structure 3, ensuring that the flipping action follows a predetermined trajectory, guaranteeing the positional accuracy of the material after flipping, and facilitating subsequent material discharge and conveying.

[0042] In one embodiment, the method for preparing the surface layer of a 100% cotton sanitary product, using the aforementioned apparatus for preparing the surface layer of a 100% cotton sanitary product, includes the following steps: S1: Feeding step, the cotton sanitary product surface to be turned is conveyed to the feeding side of the turning structure 3 via the feeding conveyor 11 and enters between the two sets of clamping and transporting components of the clamping conveyor 33; after the detector 314 detects that the material is in place, it transmits the signal to the controller in the control box 15; the detector 314 can be any one of photoelectric sensor, fiber optic sensor, proximity sensor or ultrasonic sensor. S2: Clamping step, the controller controls the drive structure 2 to start, the motor 21 drives the gear 24 to rotate in the opposite direction through the worm gear 22, worm 23 and transmission rod 25; at this time, the rack 322 is above the gear 24, the gear 24 drives the rack 322 to drive the push plate 323 to slide to the left, the push plate 323 drives the two sets of clamping and transporting components that are symmetrically distributed up and down to move closer together through two sets of connecting rod assemblies; at the same time, during the process of the two sets of connecting rod assemblies moving closer together, the gear 3351 meshes with the rack 3133 in the longitudinal sliding groove 3131, drives the active roller 335 to rotate, so that the running direction of the belt 336 is the same as the running direction of the feeding conveyor 11, and further brings the material into the clamping and transporting components to complete the clamping and fixing; S3: Flipping step, after the push plate 323 slides to the left to the limit position, the gear 1 24 continues to rotate in the opposite direction. The friction generated by the meshing contact between the gear 1 24 and the rack 2 322 drives the entire flipping structure 3 to flip. At the same time, the contact wheel 3134 moves along the arc-shaped opening 161 trajectory of the limiting plate 16. After the flipping is completed, the rack 2 322 is located below the gear 1 24, completing the flipping action of the cotton sanitary product surface layer. S4: Discharge step. After the flipping is completed, the controller controls the motor 21 to rotate in the forward direction. At this time, the rack 22 is located below the gear 124. The gear 124 drives the rack 222 to drive the push plate 323 to slide to the left. The push plate 323 drives the two sets of clamping and transporting components that are symmetrically distributed above and below to move away from each other through two sets of connecting rod assemblies. At the same time, during the separation of the two sets of connecting rod assemblies, the gear 2351 meshes with the rack 133 in the longitudinal sliding groove 3131, driving the active roller 335 to rotate, so that the belt 336 runs in the same direction as the discharge conveyor 12, pushing the flipped cotton sanitary product surface to the discharge conveyor 12 for output.

[0043] The entire preparation process is coherent, and the clamping, flipping and unloading are automated through the same driving source, which improves the efficiency and reliability of the flipping process of the surface layer of cotton hygiene products.

[0044] In one embodiment, the all-cotton sanitary product surface layer is obtained by flipping a pure cotton spunlace nonwoven fabric substrate using the aforementioned preparation device.

[0045] The preparation method of pure cotton spunlace nonwoven fabric is a well-known technology in the field, and typically includes steps such as opening and cleaning, carding, web laying, hydroentangling reinforcement, and drying. After the substrate is turned over by the above-mentioned preparation device, it can enter the subsequent functional finishing process, and perform single-sided or double-sided functional finishing according to actual needs.

[0046] Any aspects of this invention not described in detail are well-known to those skilled in the art.

[0047] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An apparatus for preparing the surface layer of all-cotton sanitary products, characterized in that, It includes a base plate (1), a drive structure (2), and a flipping structure (3); Along the material conveying direction, the upper end of the base plate (1) is sequentially equipped with a feeding conveyor (11), a control box (15), and a discharging conveyor (12); the discharging side of the feeding conveyor (11) and the feeding side of the discharging conveyor (12) are respectively connected to the feeding side and the discharging side of the flipping structure (3); the flipping structure (3) is located at the upper end of the base plate (1) and between the feeding conveyor (11) and the discharging conveyor (12); The control box (15) is equipped with a controller, which is electrically connected to the drive structure (2) and is used to control the start-up, stop and operation of the drive structure (2); The drive structure (2) is located at the upper end of the control box (15) and is used to provide the flipping power for the flipping structure (3); The drive structure (2) includes a motor (21), a worm gear (22), a worm (23), a gear (24), and a transmission rod (25); the motor (21) is mounted on the upper end of the control box (15), the worm gear (22) is fixedly connected to the output end of the motor (21), the worm (23) is meshed with the worm gear (22), and the worm (23) and gear (24) are coaxially fixed on the transmission rod (25); The flipping structure (3) includes a housing (31), a transmission component (32), and a clamping and conveying component (33). The transmission component (32) includes a rack two (322), and the gear one (24) meshes with the rack two (322); The clamping and conveying component (33) is assembled inside the housing component (31). The clamping and conveying component (33) includes two sets of connecting rod assemblies symmetrically distributed front and back and two sets of clamping and transporting assemblies symmetrically distributed top and bottom. The transmission component (32) is slidably assembled on the housing component (31). One end of the transmission component (32) is connected to the drive structure (2) and the other end is connected to the two sets of connecting rod assemblies of the clamping and conveying component (33).

2. The apparatus for preparing the surface layer of all-cotton sanitary products according to claim 1, characterized in that, The shell component (31) includes a shell plate one (311), two shell plates two (312) symmetrically distributed front and back, and two shell plates three (313) symmetrically distributed. The housing part (31) has a sliding port (3111) through which the sliding assembly transmission part (32) is opened. Two shell plates (312) are symmetrically fixed on both sides of one end of the shell component (31), and transverse sliding grooves (3121) are provided at the opposite ends of the two shell plates (312). Each shell plate two (312) is fixed with a shell plate three (313) at one end away from the shell plate one (311). Both shell plates three (313) are provided with longitudinal sliding grooves (3131) at opposite ends. A guide rod (3132) is fixed on the inner wall of the two longitudinal sliding grooves (3131) on the same side. A rack one (3133) is fixed on the inner wall of the other longitudinal sliding groove (3131) on the same side. The guide rod (3132) and rack one (3133) are connected to the clamping and transporting assembly of the clamping and conveying component (33). A detector (314) is installed on the opposite side of the two shell plates three (313) away from the shell plate two (312), and the detector (314) is electrically connected to the controller inside the control box (15); a contact wheel (3134) is installed on the outer wall of the two shell plates three (313).

3. The apparatus for preparing the surface layer of all-cotton sanitary products according to claim 2, characterized in that, The transmission component (32) includes a sliding block (321), a rack (322), and a push plate (323); The outer wall of the sliding block (321) is slidably engaged with the inner wall of the sliding opening (3111) of the shell plate (311). One end of the sliding block (321) extends into the shell component (31) and is fixedly connected to the push plate (323). The lower end of the sliding block (321) is provided with an installation groove (3211) along its length direction. The rack two (322) is fixed in the mounting groove (3211), and the height of the rack two (322) is less than the depth of the mounting groove (3211); The front and rear ends of the push plate (323) are respectively fixedly connected to two sliding plates (3231) through two connecting shafts. The front and rear ends of the push plate (323) are connected to two sets of connecting rod assemblies that hold the conveying component (33) through two connecting shafts. The sliding plates (3231) on each side are correspondingly slidably assembled in the transverse sliding groove (3121) on the same side.

4. The apparatus for preparing the surface layer of all-cotton sanitary products according to claim 3, characterized in that, Two sets of clamping and transporting components are provided between the two sets of linkage assemblies, and each set of linkage assembly includes two connecting rods (331), two connecting rods (332), and two sets of transmission units arranged symmetrically in the upper and lower parts. The same end of the two connecting rods (331) is hinged to the connecting shaft connecting the push plate (323) and the sliding plate (3231), and the other side of the two connecting rods (331) is respectively hinged to the same end of the corresponding connecting rod (332); the middle of the two connecting rods (332) is hinged to each other. Each transmission unit includes two connecting rods (334), with one end of the two connecting rods (334) hinged together, and the other end of the two connecting rods (334) respectively hinged to the body of the two connecting rods (332) via connecting shafts, and located between the middle and end of the connecting rods (332).

5. The apparatus for preparing the surface layer of all-cotton sanitary products according to claim 4, characterized in that, Each clamping and transport assembly includes an active idler (335), a belt (336), and two driven idlers (333). The belt (336) is sleeved on the outside of the driving idler (335) and the two driven idlers (333); The driven roller (333) and the driving roller (335) are respectively straddled between the front and rear sets of connecting rod assemblies, and the two ends of the driven roller (333) are respectively hinged to the ends of the connecting rods (332) of the two sets of connecting rod assemblies; The active roller (335) is hinged at both ends to the ends of two connecting rods (334) in two sets of connecting rod assemblies; one end of the active roller (335) extends into the longitudinal sliding groove (3131) of a shell plate (313) and is fixedly connected to a gear (3351); the other end of the active roller (335) extends into the longitudinal sliding groove (3131) of a shell plate (313) and is rotatably connected to a guide block (3352). The second gear (3351) meshes with the first rack (3133) in the longitudinal sliding groove (3131); the guide block (3352) has a guide groove (33521) at one end near the guide rod (3132), and the guide block (3352) slides with the guide rod (3132) through the guide groove (33521).

6. The apparatus for preparing the surface layer of all-cotton sanitary products according to claim 1, characterized in that, The upper end of the control box (15) has two fixed lugs (221) fixedly distributed on the left and right sides, and the worm gear (22) is rotatably installed between the two fixed lugs (221); the upper end of the control box (15) has two fixed lugs (251) fixedly distributed on the front and back sides, and the transmission rod (25) is rotatably installed between the two fixed lugs (251). The motor (21) is electrically connected to the controller inside the control box (15).

7. The apparatus for preparing the surface layer of all-cotton sanitary products according to claim 2, characterized in that, The bottom plate (1) is symmetrically fixed with a discharge limit seat (14) and a feed limit seat (13) on the upper end. The discharge limit seat (14) is located between the discharge conveyor frame (12) and the control box (15), and the feed limit seat (13) is located between the feed conveyor frame (11) and the control box (15). The bottom plate (1) has two limiting plates (16) fixed symmetrically at the front and back. Both limiting plates (16) have arc-shaped openings (161) on their inner sides. The arc-shaped openings (161) cooperate with the contact wheels (3134) of the housing (31). The arc-shaped openings (161) are arranged according to the flipping motion trajectory of the flipping structure (3).

8. A method for preparing the surface layer of all-cotton sanitary products, characterized in that, The apparatus for preparing the surface layer of all-cotton sanitary products as described in any one of claims 1-7 includes the following steps: S1: Feeding step, the cotton sanitary product surface to be turned is conveyed to the feeding side of the turning structure (3) via the feeding conveyor (11) and enters between the two sets of clamping and transporting components of the clamping conveyor (33); after the detector (314) detects that the material is in place, it transmits the signal to the controller in the control box (15); S2: Clamping step, the controller controls the drive structure (2) to start, the motor (21) drives the gear one (24) to rotate in the opposite direction through the worm gear (22), worm (23) and transmission rod (25); at this time, the rack two (322) is located above the gear one (24), the gear one (24) drives the rack two (322) to drive the push plate (323) to slide to the left, the push plate (323) drives the two sets of clamping and transporting components that are symmetrically distributed up and down to approach each other through the two sets of connecting rod assemblies; at the same time, during the process of the two sets of connecting rod assemblies approaching each other, the gear two (3351) meshes with the rack one (3133) in the longitudinal sliding groove (3131), drives the active roller (335) to rotate, so that the running direction of the belt (336) is the same as the running direction of the feeding conveyor (11), and brings the material further into the clamping and transporting components to complete the clamping and fixing; S3: Flipping step, after the push plate (323) slides to the left to the limit position, the gear one (24) continues to rotate in the opposite direction. The friction generated by the meshing contact between the gear one (24) and the rack two (322) drives the entire flipping structure (3) to flip. At the same time, the contact wheel (3134) moves along the arc-shaped opening (161) of the limiting plate (16). After the flipping is completed, the rack two (322) is located below the gear one (24), completing the flipping action of the cotton sanitary product surface layer; S4: Discharge step. After the flipping is completed, the controller controls the motor (21) to rotate in the forward direction. At this time, rack two (322) is located below gear one (24). Gear one (24) drives rack two (322) to drive push plate (323) to slide to the left. Push plate (323) drives two sets of clamping and transporting components that are symmetrically distributed up and down to move away from each other through two sets of linkage assemblies. At the same time, during the separation of the two sets of linkage assemblies, gear two (3351) meshes with rack one (3133) in the longitudinal sliding groove (3131), driving the active roller (335) to rotate, so that the belt (336) runs in the same direction as the discharge conveyor (12), pushing the flipped cotton sanitary product surface to the discharge conveyor (12) for output.

9. The surface layer of a 100% cotton sanitary product, characterized in that: The surface layer of the all-cotton sanitary product is made by flipping a pure cotton spunlace nonwoven fabric substrate using any of the preparation devices described in claims 1-7.

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