Air suction type material changing and receiving device for hygienic products

Abstract

The invention discloses an air suction type material changing and receiving device for hygienic products, and belongs to the field of material changing and receiving equipment. Comprising a material changing and receiving assembly, the material changing and receiving assembly comprises two tripods, an adsorption part is installed between the two tripods, first driving parts used for driving the tripods and the adsorption part to move and rotate are arranged on the two sides of the lower end of the material changing and receiving assembly, and the placing assemblies are arranged at the two ends of the material changing and receiving assembly. And coiled materials needing to be replaced are placed on the rack. According to the air suction type material changing and receiving device for the hygienic products, the adsorption pipe of the material changing and receiving assembly generates negative pressure to adsorb coiled materials, air pressure is used for replacing physical contact of a mechanical clamping jaw, adsorption force is evenly distributed on the surfaces of the coiled materials, the negative pressure strength can be controlled, adjustment is conducted according to the material characteristics, the coiled materials can be firmly fixed, and the service life of the coiled materials is prolonged. The thin material cannot be torn, the telescopic performance of the elastic material cannot be damaged due to pulling, and the integrity and the physical performance of the coiled material are effectively protected.

Description

Technical Field

[0001] This invention relates to the field of material changing equipment technology, and more particularly to a suction-type material changing device for hygiene products. Background Technology

[0002] In the automated production process of hygiene products (such as sanitary napkins, diapers, absorbent pads, etc.), the continuous supply of roll materials (such as non-woven fabrics, absorbent cores, etc.) is a key link to ensure production efficiency. When a roll of material is about to run out, it is necessary to quickly and accurately replace the old roll with a new one to avoid production line shutdown.

[0003] When changing materials, the sensor first monitors the remaining amount of the mother roll. Once the threshold is reached, the operator installs the new roll and pre-processes it. Then the production line stops, the tail of the mother roll is cut off and the waste is removed. The head of the new roll is then mechanically pulled to the docking area for positioning. The docking is then completed by pressing or heat bonding. After confirming that there are no errors, the normal speed is resumed. After that, the splicing quality needs to be checked manually. The whole process relies on manual intervention and takes a long time.

[0004] However, traditional material switching devices often rely on mechanical clamping and alignment. Since some materials used in hygiene products are sensitive to thickness and hardness—for example, thin non-woven fabrics (thickness < 0.1mm) are easily damaged by mechanical clamps, and elastic materials (such as spandex fabrics) are easily deformed by stretching—these methods can easily damage the roll joints during switching. For elastic materials like spandex fabrics, which have good elasticity, improper control of the traction force during the traditional mechanical traction process can easily lead to excessive stretching of the material, damaging its elastic properties. This can result in loosening and deformation during product use after splicing, affecting the product's fit and comfort. During the splicing process, the elastic deformation of the material due to mechanical clamping and stretching can cause uneven stress at the joint between the new and old rolls, leading to excessive compression in some areas and loose bonding in others. This can result in insufficient tightness at the joint between the new and old rolls, affecting the quality of the roll switching.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Summary of the Invention

[0006] This invention provides a suction-type material switching device for hygiene products, which solves the problem that some traditional material switching devices use mechanical clamping to clamp and align the connection of the roll material, which can easily pull on the connection of elastic material rolls, thereby causing material deformation and affecting the quality of roll material switching.

[0007] The present invention adopts the following technical solution: a suction-type material exchange device for hygiene products. It includes a material exchange assembly, which includes two tripods, with an adsorption unit installed between the two tripods. Driving units for moving and rotating the tripods and the adsorption unit are provided on both sides of the lower end of the material exchange assembly. Placement components are located at both ends of the material switching assembly and are used to place the roll material to be switched. A cutting assembly is mounted on the tripod. The cutting assembly includes a mounting bracket installed inside the tripod. A second drive unit for driving the mounting bracket to rotate is provided on one side of the tripod. A cutting part for cutting roll material is provided inside the mounting bracket. The transition component, which is located on one side of the material switching component, is used to provide transition tension for the roll material.

[0008] Furthermore, the drive unit includes linear modules mounted on both sides of the tripod. Each linear module has a slider at its upper end, and a connecting seat is mounted on the upper end of each slider. The tripod is rotatably mounted between the two connecting seats to drive the tripod to move left and right in a linear fashion. A first drive motor is mounted on one side of each slider. The output end of the first drive motor passes through the connecting seat and is fixedly connected to the tripod to drive the tripod to rotate and adjust for receiving and changing materials. The drive unit can control the rotation and movement of the tripod to ensure the accuracy of the docking position between the new and old roll materials, making the splice joint tight and the force even, reducing the risk of loosening or deformation.

[0009] Furthermore, the placement assembly includes support frames installed at both ends of the machine body, and each support frame has multiple rollers rotatably mounted on its upper end.

[0010] Furthermore, the second drive unit includes a third drive motor mounted on one side of the tripod. The output end of the third drive motor passes through the tripod and is fixedly connected to the mounting bracket, and is used to drive the cutting unit to adjust the angle.

[0011] Furthermore, the tripod is provided with an adjustment part for adjusting the adsorption width of the adsorption section. The adsorption section includes a first adsorption tube, a second adsorption tube, and a third adsorption tube. The adjustment part includes nested tubes installed on both sides of the inner wall of the first, second, and third adsorption tubes. Each nested tube has a scale line, and guide grooves are formed at the upper and lower ends of the outer wall of each nested tube. Guide blocks are installed at the upper and lower ends of the inner wall of the first, second, and third adsorption tubes. The guide blocks slide inside the guide grooves. First bidirectional... The system includes a lead screw, a second bidirectional lead screw, and a third bidirectional lead screw. The first bidirectional lead screw, the second bidirectional lead screw, and the third bidirectional lead screw respectively pass through the corresponding first adsorption tube, the second adsorption tube, and the third adsorption tube and are threadedly connected to the corresponding nested tube. These lead screws are used to adjust the position of the nested tube within the corresponding first adsorption tube, the second adsorption tube, and the third adsorption tube, thereby adjusting the adsorption width of the first adsorption tube, the second adsorption tube, and the third adsorption tube. Through the adjustment unit, the adsorption width of the first adsorption tube, the second adsorption tube, and the third adsorption tube can be automatically adjusted according to the width of the roll material, adapting to the changing needs of roll materials of different specifications and reducing manual adjustment time.

[0012] Furthermore, a first synchronous pulley is installed at one end of both the first and second bidirectional lead screws, and a first synchronous belt is driven sleeved on the outer wall of the two first synchronous pulleys. A second synchronous pulley is installed at one end of both the second and third bidirectional lead screws, and a second synchronous belt is driven sleeved on the outer wall of the two second synchronous pulleys. A second drive motor is installed on the outer wall of one side of the tripod. The output end of the second drive motor passes through the tripod and is fixedly connected to the second bidirectional lead screw. The second drive motor can drive the first, second, and third bidirectional lead screws to rotate synchronously, thereby realizing synchronous adjustment of each corresponding nested tube.

[0013] Furthermore, the cutting section includes electric push rods installed on both sides inside the mounting frame. Double-sided rack plates are mounted on the output ends of the two electric push rods. First limiting frames are installed on both sides inside the mounting frame. Each double-sided rack plate is slidably connected to its corresponding first limiting frame. A positioning frame is installed at the upper end of the two double-sided rack plates. A heating wire is provided at the upper end of the positioning frame. First guide blocks are installed on both sides of the double-sided rack plates. The first guide blocks are slidably connected to the first limiting frames for cutting the roll material.

[0014] Furthermore, the mounting frame is equipped with a heat insulation component, which includes two heat insulation plates mounted on the mounting frame. The mounting frame is equipped with a transmission part for driving the two heat insulation plates to open and close. The transmission part includes connecting shafts mounted at both ends inside the mounting frame. A first gear is mounted on one end of each connecting shaft, and each first gear meshes with the teeth on both sides of a corresponding double-sided rack plate. A second gear is mounted on the other end of each connecting shaft. Second limiting frames are mounted at both ends inside the mounting frame. A single-sided rack plate is slidably mounted inside each second limiting frame. Each single-sided rack plate meshes with a corresponding second gear. A connecting plate is mounted on the upper end of each single-sided rack plate. The two sides of the two heat insulation plates are fixedly connected to the two corresponding connecting plates. A second guide block is mounted on both sides of each single-sided rack plate. The second guide block is slidably connected to the second limiting frame. The heat insulation component isolates the heating wire.

[0015] Furthermore, the transition assembly includes a mounting plate disposed on one side of the tripod, a movable plate rotatably mounted on the upper end of the mounting plate, a transition roller fixedly mounted on the lower end of the movable plate, and a fourth drive motor mounted on one side of the upper end of the mounting plate. The output end of the fourth drive motor passes through the mounting plate and is fixedly connected to the movable plate for adjusting the position of the transition roller. Through the transition assembly, the tension of the roll material can be adjusted in real time to ensure that the new and old roll materials are in a stable tension state when they are joined, thereby reducing the force deviation at the splice.

[0016] Furthermore, the lower end of the linear module is provided with a guide roller for guiding the conveying of the roll material.

[0017] The above-described at least one technical solution adopted in the embodiments of the present invention can achieve the following beneficial effects: A suction-type material-changing device for hygiene products generates negative pressure to adsorb the roll material through the first, second, and third adsorption tubes of the material-changing assembly. Utilizing air pressure instead of physical contact with mechanical grippers, the adsorption force is evenly distributed on the roll material surface. The negative pressure intensity can be controlled and adjusted according to material characteristics. This ensures the roll material is firmly fixed without tearing thin materials or damaging the elastic properties of elastic materials due to stretching, effectively protecting the integrity and physical properties of the roll material. The adjustable part can drive the nested tubes within the first, second, and third adsorption tubes to adjust the adsorption width. The adsorption width of the first, second, and third adsorption tubes can be automatically adjusted according to the roll material width to accommodate the changing needs of different roll material specifications, reducing manual adjustment time. The heat insulation component effectively prevents the residual heat of the heating wire from affecting the roll material, ensuring that subsequently changed roll materials are not damaged. Attached Figure Description

[0018] The accompanying drawings, which are provided to further illustrate the invention and constitute a part of this invention, are illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention.

[0019] In the attached diagram: Figure 1 This is an overall schematic diagram of a suction-type material exchange device for a sanitary product according to this application; Figure 2 A first working schematic diagram of a suction-type material changing device for a hygiene product; Figure 3 A rear view schematic diagram of a suction-type material exchange device for a hygiene product; Figure 4 This is a second working schematic diagram of a suction-type material changing device for a hygiene product. Figure 5 This is a third working schematic diagram of a suction-type material exchange device for a hygiene product. Figure 6 This is a schematic diagram of the fourth working step of a suction-type material exchange device for a hygiene product. Figure 7 A top view of the cutting component of a suction-type material exchange device for a hygiene product; Figure 8 A side view of the cutting component of a suction-type material exchange device for a hygiene product; Figure 9 An exploded view of the material exchange component and the cutting component of a suction-type material exchange device for a hygiene product. Figure 10 A schematic diagram of the cutting component and heat insulation component of a suction-type material exchange device for a hygiene product; Figure 11 A bottom view of the cutting and heat insulation components of a suction-type material exchange device for a hygiene product. Figure 12 for Figure 11 Enlarged view of point A; Figure label: 1. Material changing assembly; 11. Linear module; 12. Slider; 13. Connecting seat; 14. Triangular frame; 15. First drive motor; 16. Adsorption section; 161. First adsorption tube; 162. Second adsorption tube; 163. Third adsorption tube; 17. First bidirectional lead screw; 18. Second bidirectional lead screw; 19. Third bidirectional lead screw; 110. Nested tube; 111. Scale line; 112. First synchronous pulley; 113. First synchronous belt; 114. Second synchronous pulley; 115. Second synchronous belt; 116. Second drive motor; 2. Component placement; 21. Support frame; 22. Casters; 3. Cutting assembly; 31. Mounting bracket; 32. Third drive motor; 33. Electric push rod; 34. Double-sided rack and pinion plate; 35. Positioning bracket; 36. Heating wire; 37. First limiting frame; 38. First guide block; 4. Thermal insulation component; 41. Connecting shaft; 42. First gear; 43. Second gear; 44. Second limiting frame; 45. Single-sided rack plate; 46. Connecting plate; 47. Thermal insulation plate; 48. Second guide block; 5. Transition assembly; 51. Mounting plate; 52. Movable plate; 53. Transition roller; 54. Fourth drive motor; 6. Guide roller. Detailed Implementation

[0020] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0021] The technical solutions provided by the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0022] The sanitary products described in this invention include, but are not limited to, absorbent pads, sanitary napkins, bandages, dressings, diapers, and other products related to the biomedical engineering industry.

[0023] Reference Figures 1 to 12 As shown, this embodiment of the invention provides a suction-type material exchange device for hygiene products, including a material exchange assembly 1, which includes two tripods 14. The tripods 14 are welded from lightweight high-strength steel, which reduces their own weight, facilitates the movement and rotation of the drive unit, and ensures structural strength when supporting components such as the adsorption unit 16.

[0024] Adsorption units 16 are fixedly installed at the three corners between the two tripods 14. The adsorption units include a first adsorption tube 161, a second adsorption tube 162, and a third adsorption tube 163. The surfaces of the first adsorption tube 161, the second adsorption tube 162, and the third adsorption tube 163 are precision machined to ensure the flatness of the surface. Multiple adsorption holes are opened on each of them, which can stably adsorb the roll of sanitary product replacement material. Each of the first adsorption tube 161, the second adsorption tube 162, and the third adsorption tube 163 has a connecting pipe at its lower end. These connecting pipes are made of corrosion-resistant polyvinyl chloride (PVC) material. One end of each pipe connects to the air cavity inside the corresponding first adsorption tube 161, second adsorption tube 162, and third adsorption tube 163, while the other end connects to an external fan. When the external fan is started, a stable negative pressure is created at the adsorption holes of the first adsorption tube 161, second adsorption tube 162, and third adsorption tube 163 through the connecting pipes, thereby firmly adhering the rolled material to the surfaces of the first adsorption tube 161, second adsorption tube 162, and third adsorption tube 163.

[0025] The lower end of the material changing assembly 1 has two drive units on both sides for moving and rotating the tripod 14. Each drive unit includes linear modules 11 mounted on both sides of the lower end of the material changing assembly 1. The linear modules 11 can be connected to the external machine body (not shown in the figure) via high-strength bolts to ensure no displacement occurs during operation. The linear modules 11 employ a high-precision ball screw drive, offering advantages such as high positioning accuracy, smooth operation, and fast response, enabling precise control of the horizontal movement distance of the tripod 14. The linear modules 11 represent existing mature technology, and the selection and debugging of their internal components, such as motors and guide rails, have established standards; therefore, they will not be described in detail. Each of the two linear modules 11 has a slider 12 at its upper end. The slider 12 and the guide rail of the linear module 11 are precisely fitted with a very small clearance, ensuring the straightness of the slider 12 during movement. The upper ends of the two sliders 12 are fixedly mounted with connecting seats 13 by bolts. The tripod 14 is rotatably mounted between the two connecting seats 13. The connection part uses a high-precision thrust bearing, which not only ensures the flexibility of the tripod 14's rotation but also withstands axial force, ensuring the stability of the tripod 14 during rotation, thereby realizing the horizontal movement of the tripod 14. A first drive motor 15 is fixedly mounted on one side of the slider 12. The first drive motor 15 is a servo motor, which features high control precision, large output torque, and fast response speed. The first drive motor 15 is connected to the tripod 14 through a reducer. The reducer can convert the high-speed rotation of the motor into low-speed, high-torque rotation of the tripod 14, ensuring that the tripod 14 has sufficient power during rotation. Through commands issued by the control system, the first drive motor 15 can precisely control the rotation angle of the tripod 14, thereby adjusting the angle of the tripod 14 to meet the needs of roll material switching.

[0026] The tripod 14 is equipped with an adjustment part for adjusting the adsorption width of the first adsorption tube 161, the second adsorption tube 162, and the third adsorption tube 163. The adjustment part includes a nested tube 110 that is slidably installed on both sides of the inner wall of the first adsorption tube 161, the second adsorption tube 162, and the third adsorption tube 163. The nested tube 110 adopts a tubular structure that is adapted to the inner wall of the first adsorption tube 161, the second adsorption tube 162, and the third adsorption tube 163. One side of the nested tube 110 is open and the other side is closed. Its outer wall is precision polished to ensure that it can closely fit the inner wall of the first adsorption tube 161, the second adsorption tube 162, and the third adsorption tube 163 during sliding, while maintaining a smooth movement trajectory. Each nested tube 110 is provided with a scale line 111 for easy observation of the adjustment distance of the nested tube 110.

[0027] Guide grooves are provided at both the upper and lower ends of the outer wall of the nested tube 110. Guide blocks are fixedly installed at both the upper and lower ends of the inner walls of the first adsorption tube 161, the second adsorption tube 162, and the third adsorption tube 163. The guide blocks slide inside the guide grooves. The guide grooves at both the upper and lower ends of the outer wall of the nested tube 110 are dovetail groove structures, and the corresponding guide blocks are wedge-shaped. This design can not only effectively limit the rotational freedom of the nested tube 110 and prevent it from deviating or getting stuck during movement, but also disperse the friction generated during sliding and extend the service life of the components.

[0028] At the three corners of the two tripods 14, a first bidirectional lead screw 17, a second bidirectional lead screw 18, and a third bidirectional lead screw 19 are rotatably mounted. These lead screws are threadedly connected to their corresponding nested tubes 110. All three lead screws are made of high-strength alloy material and have undergone rust-proofing treatment and precision thread machining. The threads at both ends of the bidirectional lead screws rotate in opposite directions. When the lead screws rotate, the two nested tubes 110 connected to them move relatively linearly in opposite directions under the push of the threads.

[0029] When the lead screw rotates clockwise, the nested tubes 110 on both sides move closer to the middle, gradually closing the adsorption holes in the middle of the first adsorption tube 161, the second adsorption tube 162, and the third adsorption tube 163; when the lead screw rotates counterclockwise, the nested tubes 110 separate at both ends, exposing more adsorption holes and thus expanding the adsorption working width. To ensure the synchronization of the adjustment of the first adsorption tube 161, the second adsorption tube 162, and the third adsorption tube 163, the device adopts a dual synchronous belt drive system. One end of the first bidirectional lead screw 17 and the second bidirectional lead screw 18 are fixedly installed with a first synchronous pulley 112. The outer wall of the two first synchronous pulleys 112 is fitted with a first synchronous belt 113. One end of the second bidirectional lead screw 18 and the third bidirectional lead screw 19 is fixedly installed with a second synchronous pulley 114. The outer wall of the two second synchronous pulleys 114 is fitted with a second synchronous belt 115. A second drive motor 116 is fixedly installed on the outer wall of one side of a tripod 14. The output end of the second drive motor 116 passes through the tripod 14 and is fixedly connected to the second bidirectional lead screw 18.

[0030] The first synchronous pulleys 112 at the ends of the first bidirectional lead screw 17 and the second bidirectional lead screw 18 have the same diameter and are connected by a first synchronous belt 113 made of polyurethane. Similarly, the second bidirectional lead screw 18 and the third bidirectional lead screw 19 are connected to the second synchronous belt 115 through the second synchronous pulley 114, forming a series transmission structure.

[0031] When the second drive motor 116 fixed on one side of the tripod 14 is started, its output end drives the second bidirectional lead screw 18 to rotate. Through the transmission action of the first synchronous belt 113 and the second synchronous belt 115, the first bidirectional lead screw 17 and the third bidirectional lead screw 19 will rotate synchronously at the same speed and direction, thereby ensuring that the adjustment range of the nested tube 110 of the first adsorption tube 161, the second adsorption tube 162 and the third adsorption tube 163 is consistent, and avoiding the uneven force on the roll material due to inconsistent adsorption width, which may cause displacement or wrinkles. Furthermore, the second drive motor 116 is a servo motor with forward and reverse rotation control and speed adjustment capabilities. Combined with the motor controller, it enables automated and precise adjustment of the adsorption width. Operators only need to input the required roll width parameters into the control system, and the motor will drive the lead screw to the corresponding position. The entire adjustment process takes no more than 3 seconds, improving the equipment's changeover efficiency.

[0032] Meanwhile, the encoder integrated inside the motor can provide real-time feedback on the rotation angle, and the actual position of the nested tube 110 is calculated by the control system. When the set width is reached, it automatically stops, and the adjustment error can be controlled within ±0.5 mm, which fully meets the needs of high-precision roll material processing. Both ends of the tripod 14 are equipped with placement components 2. Placement components 2 are the starting point of the material switching process and play an important role in providing a stable supply of roll material for the material switching operation. They can ensure that the roll material to be switched is in the right position and state, laying the foundation for the smooth operation of the subsequent material switching components 1.

[0033] Reference Figures 1 to 3As shown, the placement component 2 includes support frames 21 fixedly installed at both ends of the tripod 14. The support frames 21 are welded from high-quality steel, and the bottom is firmly connected to the external body through expansion bolts, forming a stable overall structure with the body. This ensures that the center of the roll material placed on it is in a reasonable relative position to the center of the adsorption part 16 in the material exchange component 1. Each support frame 21 has multiple rollers 22 installed on its upper end, usually 4-6, symmetrically distributed on both sides of the upper end of the support frame 21. The rollers 22 are made of high-strength wear-resistant rubber.

[0034] Reference Figures 7 to 12 As shown, a cutting assembly 3 is installed inside the tripod 14. The cutting assembly 3 is a key component for separating the roll material during the material switching process. It can accurately cut the roll material at the appropriate time to ensure the smooth switching process. The cutting assembly 3 includes a mounting bracket 31 rotatably installed inside the tripod 14. The mounting bracket 31 is made of aluminum alloy, which is lightweight and structurally robust. It can provide a stable mounting base for the internal components. Its shape is adapted to the internal space of the tripod 14 to ensure that it will not collide with the tripod 14 during rotation.

[0035] A second drive unit is provided on one side of the tripod 14 to drive the mounting frame 31 to rotate. The second drive unit can drive the mounting frame 31 to rotate flexibly to adapt to the needs of cutting roll material at different positions and angles.

[0036] The second drive unit includes a third drive motor 32 fixedly mounted on one side of the tripod 14. This third drive motor 32 is also a servo motor, possessing excellent control precision and stability. It is securely and reliably connected to the tripod 14 via a motor mount. The output end of the third drive motor 32 passes through the tripod 14 and is fixedly connected to the mounting bracket 31. Under the control of the control system, it can precisely drive the mounting bracket 31 to rotate, thereby adjusting the angle of the mounting bracket 31 and placing the cutting assembly 3 in the optimal cutting position. The mounting frame 31 is equipped with a cutting section for cutting rolls of material. The cutting section includes electric push rods 33 that are fixedly installed on both sides inside the mounting frame 31. The cylinder of the electric push rod 33 is firmly connected to the inner wall of the mounting frame 31 by bolts to ensure that it will not loosen during operation.

[0037] Two electric actuators 33 have double-sided rack plates 34 fixedly mounted at their output ends. The rack plates 34 are made of high-strength steel plates with rust-proof treatment, ensuring a long service life. Inside the mounting bracket 31, first limit frames 37 are bolted to both sides. The first limit frames 37 are U-shaped structures made of wear-resistant cast iron, effectively guiding and limiting the movement of the double-sided rack plates 34. Each double-sided rack plate 34 is slidably connected to its corresponding first limit frame 37, ensuring that the double-sided rack plates 34 can only move up and down in a straight line under the push of the electric actuators 33, improving the stability and accuracy of the movement.

[0038] Positioning frames 35 are fixedly installed on the upper ends of the two double-sided toothed plates 34. The positioning frames 35 are made of high-temperature resistant materials and can withstand the high temperatures generated when the heating wire 36 is working. The upper end of the positioning frame 35 is provided with a heating wire 36, which is made of high-resistance alloy material. After being energized, it can quickly generate high temperature and melt the roll material in a short time, resulting in fast cutting speed and neat cut.

[0039] The electric push rod 33 pushes the positioning frame 35 upward, causing the heating wire 36 to contact the roll material and cut it. The entire cutting process is fast and efficient, effectively reducing the time wasted on material changes. Simultaneously, first guide blocks 38 are fixedly installed on both sides of the double-sided rack plate 34. The first guide blocks 38 are made of wear-resistant plastic and are slidably connected to the first limit frame 37, further enhancing the guidance and stability of the double-sided rack plate 34 during movement and preventing it from shifting or jamming. Reference Figures 9 to 12 As shown, a heat insulation component 4 is installed on the mounting frame 31. The heat insulation component 4 is an important part to ensure the quality of the roll material. It can effectively prevent the residual heat of the heating wire 36 from affecting the roll material and ensure that the roll material being replaced later is not damaged. The heat insulation component 4 includes two heat insulation plates 47 installed on the mounting frame 31. The heat insulation plates 47 are made of high-temperature resistant heat insulation material and have good heat insulation performance. Their size is larger than the working range of the heating wire 36 and can cover the area around the heating wire 36.

[0040] The heat insulation board 47 is made of glass fiber reinforced silicate board. This material is made by adding alkali-resistant glass fiber as the reinforcing material, sulfoaluminate cement as the binding material, and adding appropriate auxiliary materials through processes such as mixing, molding, and curing.

[0041] It possesses excellent high-temperature resistance and can be used for extended periods in environments exceeding 200°C, effectively blocking the heat generated by the heating wire 36. Simultaneously, its low thermal conductivity provides significant insulation, drastically reducing heat transfer efficiency. Furthermore, the material exhibits good mechanical strength, resisting deformation and breakage, and its smooth surface prevents scratches or damage to the roll material. The mounting frame 31 is equipped with a transmission mechanism for opening and closing the two heat insulation plates 47, enabling the linkage between the heat insulation plates 47 and the cutting assembly 3. The transmission mechanism includes connecting shafts 41 rotatably mounted at both ends inside the mounting frame 31. The connecting shafts 41 are made of high-strength alloy steel and have undergone surface tempering treatment, giving them high wear resistance and fatigue resistance. Both ends of the shafts are rotatably connected to the mounting frame 31 via bearings to ensure smooth rotation.

[0042] Each connecting shaft 41 has a first gear 42 fixedly installed at one end. The first gear 42 is forged from high-quality steel and the tooth surface is treated with high frequency quenching, resulting in high strength and smooth transmission. Each first gear 42 meshes with the teeth on both sides of the corresponding double-sided rack plate 34. The meshing gap is precisely adjusted to ensure the accuracy of transmission.

[0043] A second gear 43 is fixedly installed at the other end of each connecting shaft 41. The second gear 43 is made of the same material and has the same processing technology as the first gear 42 to ensure that the transmission characteristics of the two are matched. A second limiting frame 44 is fixedly installed at both ends inside the mounting bracket 31. The second limiting frame 44 is a rectangular frame structure.

[0044] Each second limiting frame 44 has a single-sided rack plate 45 slidably installed inside. The single-sided rack plate 45 is made of the same high-strength steel plate as the double-sided rack plate 34, and its surface is also treated with rust prevention. Each single-sided rack plate 45 meshes with the corresponding second gear 43, ensuring precise and reliable transmission. A connecting plate 46 is fixedly installed at the upper end of each single-sided rack plate 45. The connecting plate 46 is made of stainless steel and is firmly connected to the single-sided rack plate 45 and the heat insulation plate 47 by bolts to ensure connection strength.

[0045] The two heat insulation plates 47 are fixedly connected to the two corresponding connecting plates 46 on both sides, so that the heat insulation plates 47 can move synchronously with the single-sided rack plate 45. A second guide block 48 is fixedly installed on both sides of each single-sided rack plate 45. The second guide block 48 is made of wear-resistant plastic and is slidably connected to the second limiting frame 44 to improve the stability of the movement of the single-sided rack plate 45 and to limit the movement of the single-sided rack plate 45. When the electric push rod 33 is driven, it pushes the double-sided rack plate 34 to move upward. Since the double-sided rack plate 34 is meshed with the first gear 42 and the first gear 42 and the second gear 43 are coaxial, the second gear 43 can be driven to rotate. The second gear 43 is meshed with the single-sided rack plate 45, so that the single-sided rack plate 45 can move left and right. Therefore, when the double-sided rack plate 34 moves upward and pushes the heating wire 36 on the positioning frame 35 to rise, it can simultaneously drive the two heat insulation plates 47 to move to both sides, exposing the heating wire 36 for cutting.

[0046] Conversely, after cutting is completed, the electric push rod 33 drives the double-sided toothed plate 34 to move down, and the two heat insulation plates 47 move closer to the center and close, wrapping the heating wire 36 inside, realizing the function of heat insulation and protection for the heating wire 36, preventing the residual heat of the heating wire 36 from affecting the roll material, and ensuring the quality of the roll material.

[0047] Reference Figure 3 As shown, a transition component 5 is provided on one side of the tripod 14. The transition component 5 plays an important role in buffering and tensioning during the roll material transmission process, preventing the roll material from becoming loose or overstretched due to changes in transmission speed, and ensuring the smoothness of the roll material transmission. The transition component 5 includes a mounting plate 51 provided on one side of the tripod 14. The mounting plate 51 is made of thick steel plate and is fixedly connected to the machine body by welding, providing a firm connection and stable support for other components of the transition component 5.

[0048] A movable plate 52 is rotatably mounted on the upper end of the mounting plate 51. The movable plate 52 is made of high-strength alloy material, which has a certain degree of toughness and strength and can rotate flexibly. A transition roller 53 is fixedly mounted on the lower end of the movable plate 52. The surface of the transition roller 53 is chrome-plated, which is smooth and wear-resistant and can reduce the friction between it and the roll material. At the same time, its length is greater than the width of the roll material to ensure that the roll material can be smoothly transitioned.

[0049] A fourth drive motor 54 is fixedly mounted on one side of the upper end of the mounting plate 51. The fourth drive motor 54 is a servo motor with high control precision, which can accurately control the rotation angle of the movable plate 52. The output end of the fourth drive motor 54 passes through the mounting plate 51 and is fixedly connected to the movable plate 52. Under the control of the control system, the position of the movable plate 52 can be precisely adjusted according to the transmission of the roll material, thereby adjusting the position of the transition roller 53 to achieve the best transition tension effect.

[0050] The lower end of the linear module 11 is provided with a guide roller 6. The guide roller 6 uses the same material and processing technology as the transition roller 53. Its axis is perpendicular to the transmission direction of the roll material. It is used to guide the roll material to ensure that the roll material is accurately transmitted along the preset path and to avoid the roll material from deviating during transmission.

[0051] Material changing process: such as Figure 2 As shown, when the tripod 14 is initially in an inverted triangle state, the adsorption part 16 on the upper left side of the tripod 14 is the first adsorption tube 161, the adsorption part 16 on the upper right side of the tripod 14 is the second adsorption tube 162, and the adsorption part 16 at the lower end of the tripod 14 is the third adsorption tube 163. At this time, the roll material passes over the lower end of the transition roller 53 from the right side of the roll, passes through the second adsorption tube 162 and the first adsorption tube 161, then passes through the third adsorption tube 163 below the tripod 14, and then passes through the guide roller 6 to transport the roll material.

[0052] When the material roll on the right side is exhausted, the control system quickly issues a command to activate the linear module 11. The linear module 11 drives the slider 12 to move smoothly using a high-precision ball screw drive, which in turn moves the connecting seat 13 and the tripod 14 to the left. During the movement, the tripod 14 maintains a stable posture until the material roll on the first adsorption tube 161 precisely overlaps with the material roll on the left side. The material roll on the left side is pre-installed with adhesive tape of moderate viscosity, the adhesion of which has been tested to ensure a firm bond with the material roll on the adsorption tube 16.

[0053] After the two rolls of material are overlapped, the external negative pressure generating device connected to the first adsorption tube 161 and the second adsorption tube 162 at the upper end of the tripod 14 is activated. A stable negative pressure is formed at the adsorption holes of the first adsorption tube 161 and the second adsorption tube 162 through the connecting pipes, firmly adsorbing the rolls on the first adsorption tube 161 and the second adsorption tube 162, while simultaneously ensuring tight adhesion to the tape on the left roll. At this time, the roll material remains flat and stable under the action of the first adsorption tube 161 and the second adsorption tube 162 at the upper end of the tripod 14.

[0054] Subsequently, the cutting assembly 3 begins to work. The third drive motor 32 drives the mounting frame 31 to rotate to a suitable angle. The electric push rod 33 pushes the double-sided rack plate 34 to rise along the first limit frame 37, driving the positioning frame 35 and the heating wire 36 to rise. At the same time, under the action of the transmission part, the two heat insulation plates 47 move to both sides. The heating wire 36 contacts the roll material and quickly melts and cuts it. At this time, the guide roller 6 is located at the lower right of the tripod 14 and can be used to guide the roll material. At the same time, the roll material adheres to the first adsorption tube 161 and the third adsorption tube 163, completing the first switching. The whole process is smooth and efficient, with short time consumption, effectively reducing production interruption time. like Figure 4 As shown, when the material roll on the left gradually decreases during production, in order to ensure the stability of the roll conveying, the control system monitors the roll status in real time and starts the linear module 11 to drive the tripod 14 to move continuously to the left. During the movement, the material roll is always tightly overlapped with the first adsorption tube 161 and the third adsorption tube 163 on the left side of the tripod 14 to achieve tensioning of the roll and avoid problems such as loosening or wrinkling of the roll, thus ensuring the stability of the roll conveying.

[0055] When the material roll on the left side is completely used up, the first suction tube 161 and the third suction tube 163 on the left side of the tripod 14 immediately increase the negative pressure, firmly adhering the remaining material to the first suction tube 161 and the third suction tube 163 to prevent the material from falling off. Then, the third drive motor 32 in the cutting assembly 3 is activated, driving the positioning frame 35 to rotate precisely 120°, thereby adjusting the cutting angle of the heating wire 36 to the optimal angle that matches the current position of the material, ensuring a neat cut. After adjustment, the cutting assembly 3 starts according to the preset program, and the electric push rod 33 pushes the heating wire 36 upward, smoothly cutting the material. like Figure 5 As shown, after cutting, the control system coordinates the operation of the linear module 11 and the first drive motor 15. First, the linear module 11 is activated, moving the tripod 14 to the right. Simultaneously, the first drive motor 15 is activated, transmitting power to the tripod 14 via a reducer, causing the tripod 14 to rotate precisely 240°. During this rotation, the tripod 14 remains stable, ensuring accurate positioning of the roll material on the adsorption section 16, ultimately causing the third adsorption tube 163 at the lower end of the tripod 14 to rotate to the upper right side.

[0056] At this time, the third adsorption tube 163 maintains negative pressure adsorption on the roll material, precisely rotating and aligning the adsorbed roll material with the lower end of the right-side roll. The right-side roll is also equipped with adhesive tape of the same specifications as the left-side roll, and the roll on the third adsorption tube 163 adheres firmly to the adhesive tape after contact. like Figure 6 As shown, after docking, the linear module 11 is activated to move the tripod 14 to the left. At the same time, the first drive motor 15 is activated to rotate the tripod 14 in the opposite direction by 240°, so that the third adsorption tube 163 at the upper end of the tripod 14 can rotate smoothly back to the initial position and return to the initial standby position.

[0057] Subsequently, the fourth drive motor 54 is started, driving the movable plate 52 to rotate, so that the transition roller 53 rotates precisely to the lower end of the right side of the roll. The transition roller 53 applies appropriate pressure to the roll material, which plays a tensioning role, ensuring that the roll material maintains appropriate tension during the transmission process and successfully completes the second docking.

[0058] When the material roll on the right side is used up, the fourth drive motor 54 is started to drive the transition roller 53 to rotate, so that the transition roller 53 rotates to the upper part of the middle of the linear module 11, in preparation for the next switching operation, and waits for the next switching command to be issued. The entire material switching cycle is efficient and precise, and can well adapt to the high-speed production needs of the automated production line of hygiene products. Working principle: First, before the device is started, the initial state is confirmed. The tripod 14 is in an inverted triangle posture. There is a first adsorption tube 161 on the left side of the upper end of the tripod 14, a second adsorption tube 162 on the right side, and a third adsorption tube 163 at the lower end. The roll material passes around the lower end of the transition roller 53 from the right side, and passes through the second adsorption tube 162, the first adsorption tube 161, and the third adsorption tube 163 in sequence. Finally, it is conveyed to the downstream by the guide roller 6.

[0059] When the material roll on the right side is used up, the control system triggers a command, and the linear module 11 drives the slider 12 to move the tripod 14 horizontally to the left. During the movement, the tripod 14 maintains a stable posture until the material roll on the first adsorption tube 161 is precisely aligned with the edge of the new material roll on the left side.

[0060] The new material roll on the left side is pre-attached with adhesive tape. After the overlap is completed, the external fan connected to the first adsorption tube 161 and the second adsorption tube 162 is started. A stable negative pressure is formed at the adsorption hole through the connecting pipe, which firmly adsorbs the roll material onto the surface of the adsorption tube, and at the same time makes the roll material tightly bonded to the tape of the material roll on the left side.

[0061] When the cutting assembly 3 is started, the third drive motor 32 drives the mounting bracket 31 to rotate to a perpendicular angle with the roll material, ensuring that the heating wire 36 is aligned with the cutting position.

[0062] The electric push rod 33 pushes the double-sided rack plate 34 to rise along the first limiting frame 37, which in turn drives the positioning frame 35 and the heating wire 36 to rise. At the same time, the transmission part moves synchronously, and the double-sided rack plate 34 meshes with the first gear 42, which drives the connecting shaft 41 and the second gear 43 to rotate, causing the single-sided rack plate 45 to move to both sides along the second limiting frame 44. Finally, the two heat insulation plates 47 open to both sides, exposing the heating wire 36.

[0063] When the heating wire 36 is energized to the preset temperature, which is usually 150-200℃ depending on the material of the roll, it melts the old roll instantly upon contact with it. The cutting time is ≤0.5 seconds, and the cut is neat and burr-free.

[0064] After cutting, the electric push rod 33 drives the double-sided toothed plate 34 to move down, the heating wire 36 returns to its original position, and at the same time the heat insulation plate 47 closes and wraps the heating wire 36 to prevent residual heat from affecting the new roll material.

[0065] After the old roll is cut, the new roll on the left continues to be conveyed through the first adsorption tube 161 and the third adsorption tube 163. The guide roller 6 guides the roll to ensure a stable transmission path, and the device enters the left roll supply state.

[0066] As the material roll on the left side is gradually consumed, in order to avoid the material from loosening or wrinkling, the device maintains stable tension through continuous adjustment. The control system monitors the diameter of the material roll in real time and synchronously drives the linear module 11 to move the tripod 14 slowly to the left through sensor or motor torque feedback, so that the material roll is always tightly attached to the surface of the first adsorption tube 161 and the third adsorption tube 163. The tension of the material roll is maintained by the change in the relative position of the adsorption part 16 and the material roll.

[0067] Once the left-side roll is completely used up, the device switches back to the right-side roll as follows: When the material roll on the left side is used up, the first adsorption tube 161 and the third adsorption tube 163 are immediately activated to firmly adsorb the remaining end of the roll material. At this time, the roll material is supported only by the first adsorption tube 161 and the third adsorption tube 163.

[0068] The third drive motor 32 starts again, driving the mounting bracket 31 to rotate precisely 120°, so that the cutting direction of the heating wire 36 matches the current tilt angle of the roll material. As the position of the tripod 14 moves, the angle of the roll material changes.

[0069] Repeat the cutting process of the first connection. The electric push rod 33 pushes the heating wire 36 up to melt the remaining roll material. After the cutting is completed, the heat insulation plate 47 closes and the heating wire 36 returns to its original position.

[0070] The linear module 11 drives the tripod 14 to move horizontally to the right, while the first drive motor 15 drives the tripod 14 to rotate precisely 240°. During the rotation, the third adsorption tube 163 always maintains negative pressure to adsorb the end of the remaining roll material.

[0071] After the rotation is complete, the third adsorption tube 163 rotates from the bottom to the upper right side, aligning with the edge of the new material roll with the same specification tape pre-attached on the right side. The negative pressure adsorption causes the roll material and the tape to adhere.

[0072] At the same time, the fourth drive motor 54 drives the movable plate 52 to rotate, so that the transition roller 53 presses on the lower end of the right side of the roll, applying a preset pressure to the roll material to achieve tension.

[0073] After the second switching is completed, the device is reset to the initial state to prepare for the next switching. The linear module 11 drives the tripod 14 to move to the left to the initial horizontal position. At the same time, the first drive motor 15 drives the tripod 14 to rotate 240° in the opposite direction, so that the third adsorption tube 163 turns from the upper right side back to the lower end, and the tripod 14 returns to the initial inverted triangle posture.

[0074] The fourth drive motor 54 drives the movable plate 52 to rotate, so that the transition roller 53 moves from the lower end of the right side of the material roll to the middle and above the straight module 11, avoiding the movement path of the tripod 14, and waiting for the next switching command.

[0075] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A suction-type material changing device for hygiene products, characterized in that: include The material exchange assembly (1) includes two tripods (14), an adsorption part (16) is installed between the two tripods (14), and a drive part is provided on both sides of the lower end of the material exchange assembly (1) for driving the tripods (14) and the adsorption part (16) to move and rotate. Placement component (2), which is disposed at both ends of the material exchange component (1), is used to place the roll material to be exchanged; A cutting assembly (3) is mounted on the tripod (14). The cutting assembly (3) includes a mounting bracket (31) installed inside the tripod (14). A driving part for driving the mounting bracket (31) to rotate is provided on one side of the tripod (14). A cutting part for cutting roll material is provided inside the mounting bracket (31). The transition component (5) is disposed on one side of the material switching component (1) and is used to provide transition tension for the roll material.

2. The suction-type material changing device for sanitary products according to claim 1, characterized in that: The drive unit includes linear modules (11) installed on both sides of the tripod (14). Each of the two linear modules (11) has a slider (12) at its upper end. Each of the two sliders (12) has a connecting seat (13) installed at its upper end. The tripod (14) is rotatably installed between the two connecting seats (13) to drive the tripod (14) to move left and right in a straight line. A first drive motor (15) is installed on one side of the slider (12). The output end of the first drive motor (15) passes through the connecting seat (13) and is fixedly connected to the tripod (14) to drive the tripod (14) to rotate and adjust to receive and change materials.

3. The suction-type material changing device for hygiene products according to claim 1, characterized in that: The placement assembly (2) includes support frames (21) arranged on both sides of the tripod (14), and each support frame (21) has multiple rollers (22) mounted on its upper end for relative rotation.

4. The suction-type material changing device for sanitary products according to claim 1, characterized in that: The second drive unit includes a third drive motor (32) installed on one side of the tripod (14). The output end of the third drive motor (32) passes through the tripod (14) and is fixedly connected to the mounting bracket (31) to drive the cutting unit to adjust the angle.

5. The suction-type material changing device for hygiene products according to claim 1, characterized in that: The tripod (14) is provided with an adjustment part for adjusting the adsorption width of the adsorption part (16). The adsorption part (16) includes a first adsorption tube (161), a second adsorption tube (162), and a third adsorption tube (163). The adjustment part includes nested tubes (110) installed on both sides of the inner wall of the first adsorption tube (161), the second adsorption tube (162), and the third adsorption tube (163). Each nested tube (110) is provided with a scale line (111). The upper and lower ends of the outer wall of each nested tube (110) are provided with guide grooves. The upper and lower ends of the inner wall of the first adsorption tube (161), the second adsorption tube (162), and the third adsorption tube (163) are provided with guide grooves. Each end is equipped with a guide block, which slides inside the guide groove. At the three corners between the two tripods (14), a first bidirectional lead screw (17), a second bidirectional lead screw (18), and a third bidirectional lead screw (19) are rotatably installed. The first bidirectional lead screw (17), the second bidirectional lead screw (18), and the third bidirectional lead screw (19) pass through the corresponding first adsorption tube (161), the second adsorption tube (162), and the third adsorption tube (163) respectively and are threadedly connected to the corresponding nested tube (110) to adjust the position of the nested tube (110) in the corresponding first adsorption tube (161), the second adsorption tube (162), and the third adsorption tube (163).

6. The suction-type material changing device for sanitary products according to claim 5, characterized in that: One end of the first bidirectional lead screw (17) and the second bidirectional lead screw (18) is equipped with a first synchronous pulley (112). The outer wall of the two first synchronous pulleys (112) is equipped with a first synchronous belt (113). One end of the second bidirectional lead screw (18) and the third bidirectional lead screw (19) is equipped with a second synchronous pulley (114). The outer wall of the two second synchronous pulleys (114) is equipped with a second synchronous belt (115). The outer wall of one side of the tripod (14) is equipped with a second drive motor (116). The output end of the second drive motor (116) passes through the tripod (14) and is fixedly connected to the second bidirectional lead screw (18). The second drive motor (116) drives the first bidirectional lead screw (17), the second bidirectional lead screw (18) and the third bidirectional lead screw (19) to rotate synchronously.

7. The suction-type material changing device for sanitary products according to claim 1, characterized in that: The cutting section includes electric push rods (33) installed on both sides inside the mounting frame (31). The output ends of the two electric push rods (33) are equipped with double-sided rack plates (34). The two sides inside the mounting frame (31) are equipped with first limiting frames (37). Each double-sided rack plate (34) is slidably connected to the corresponding first limiting frame (37). The upper ends of the two double-sided rack plates (34) are equipped with positioning frames (35). The upper ends of the positioning frames (35) are provided with heating wires (36). The two sides of the double-sided rack plates (34) are equipped with first guide blocks (38). The first guide blocks (38) are slidably connected to the first limiting frames (37) for cutting the roll material.

8. A suction-type material changing device for sanitary products according to claim 7, characterized in that: The mounting frame (31) is provided with a heat insulation component (4), which includes two heat insulation plates (47) mounted on the mounting frame (31). The mounting frame (31) is provided with a transmission part for driving the two heat insulation plates (47) to open and close. The transmission part includes connecting shafts (41) installed at both ends inside the mounting frame (31). A first gear (42) is installed at one end of each connecting shaft (41). Each first gear (42) meshes with the teeth on both sides of the corresponding double-sided rack plate (34). A second gear (43) is installed at the other end of each connecting shaft (41). The mounting frame (31) The inner end is equipped with a second limiting frame (44), and a single-sided rack plate (45) is slidably installed inside each of the second limiting frames (44). Each single-sided rack plate (45) is meshed with a corresponding second gear (43). A connecting plate (46) is installed at the upper end of each single-sided rack plate (45). The two sides of the two heat insulation plates (47) are respectively fixedly connected to the two corresponding connecting plates (46). A second guide block (48) is installed on both sides of each single-sided rack plate (45). The second guide block (48) is slidably connected to the second limiting frame (44). The heat insulation component (4) isolates the heating wire (36).

9. A suction-type material changing device for sanitary products according to claim 1, characterized in that: The transition assembly (5) includes a mounting plate (51) disposed on one side of the tripod (14). A movable plate (52) is rotatably mounted on the upper end of the mounting plate (51). A transition roller (53) is fixedly mounted on the lower end of the movable plate (52). A fourth drive motor (54) is mounted on one side of the upper end of the mounting plate (51). The output end of the fourth drive motor (54) passes through the mounting plate (51) and is fixedly connected to the movable plate (52) for adjusting the position of the transition roller (53).

10. A suction-type material changing device for hygiene products according to claim 2, characterized in that: The lower end of the linear module (11) is provided with a guide roller (6) for guiding the conveying of the roll material.

Images