Ultrasonic welding device for pressing edges of sanitary napkins

Abstract

The invention discloses an ultrasonic welding device for sanitary towel edge pressing, and belongs to the field of welding knurling, the ultrasonic welding device comprises a pressing platform, a knurling mechanism is arranged on the pressing platform, a driving mechanism is arranged between the knurling mechanism and the pressing platform, the knurling mechanism comprises a mounting bracket rotationally arranged on the pressing platform, and a circular ring rotating shaft is rotationally arranged on the mounting bracket; a circular ring rotating shaft is arranged on the pressing platform, a circular pulling plate is arranged on the circular ring rotating shaft in a sliding mode, a plug pin is fixedly arranged on the circular pulling plate, an embossing welding roller is detachably installed in the circular ring rotating shaft, the embossing welding roller is fixedly connected with the circular ring rotating shaft through the plug pin, and the embossing welding roller can rotate relative to the installation support; according to the embossing welding roller device, the three sets of embossing welding rollers are arranged to meet different embossing requirements, the overall structure of the device is coherent, the functions are matched with one another, finally, the embossing welding rollers are easily disassembled, and time is saved.

Description

Technical Field

[0001] This invention relates to the field of welding embossing, and in particular to an ultrasonic welding device for pressing the edges of sanitary napkins. Background Technology

[0002] In the actual production process of sanitary napkins, ultrasonic embossing welding is the mainstream processing technology. This process uses an embossing roller and simultaneously completes the two core processes of embossing and welding. The welding head of the ultrasonic welding system cooperates with the embossing roller, which has a preset pattern on its surface. The high-frequency mechanical vibration emitted by the welding head is transmitted to the contact surface of the composite layers of the sanitary napkin. Through the friction effect, local high temperatures are generated, which causes the thermoplastic materials between the layers to fuse quickly and achieve a strong weld. At the same time, the pattern on the surface of the embossing roller is simultaneously imprinted on the product surface or edge sealing position under the combined action of pressure and heat, completing the embossing process.

[0003] In actual production, different types of sanitary napkins typically have different embossing requirements, necessitating the use of different embossing rollers. Common welding equipment usually only has one set of embossing rollers; when different types of embossing are required, the embossing rollers must be removed, a process that is quite cumbersome. Summary of the Invention

[0004] This invention provides an ultrasonic welding device for edge pressing of sanitary napkins, which can solve the problem in the prior art that when different types of embossing are required, the embossing roller needs to be removed, and the removal process is relatively cumbersome.

[0005] An ultrasonic welding device for edge pressing of sanitary napkins includes a pressing platform, an embossing mechanism on the pressing platform, and a driving mechanism between the embossing mechanism and the pressing platform. The embossing mechanism includes a mounting bracket rotatably mounted on a pressing platform, a circular rotating shaft rotatably mounted on the mounting bracket, a circular pull plate slidably mounted on the circular rotating shaft, a pin fixedly mounted on the circular pull plate, and an embossing welding roller detachably mounted inside the circular rotating shaft. The embossing welding roller is fixedly connected to the circular rotating shaft via the pin and can rotate relative to the mounting bracket. The driving mechanism includes a slot and a push plate that are slidably disposed on the pressing platform. The slot is used to pull the circular pull plate, and the push plate is used to push the embossing welding roller.

[0006] Furthermore, the pressing platform includes a first housing, on which a pressing table is fixedly mounted, and a second housing is fixedly mounted at the top of the first housing. The second housing also contains a partition plate with several slots.

[0007] Furthermore, the embossing mechanism includes a first disc, which is rotatably mounted on the first housing, and a first drive source is connected to the first disc. The first drive source drives the first disc to rotate, and the first drive source includes, but is not limited to, a motor drive.

[0008] Furthermore, a mounting bracket is coaxially and fixedly provided on the first disc. The mounting bracket is an isosceles triangular structure. Three sets of embossing and welding rollers are arranged in a circumferential array on the mounting bracket. The three sets of embossing and welding rollers have the same structure. The apex of the triangle of the mounting bracket is the mounting end. A circular rotating shaft is rotatably provided on one side of the mounting end. Several first springs are fixedly provided on the circular rotating shaft. A circular pull plate is fixedly provided at the end of the several first springs. A pin is fixedly provided at the center of the circular pull plate. A first friction wheel is coaxially and fixedly provided on one end of the embossing and welding roller. A mating end is coaxially and fixedly provided on the first friction wheel. The mating end is inserted into the circular rotating shaft. A protruding shaft is fixedly provided on the other end of the embossing and welding roller.

[0009] Furthermore, a second friction wheel that can slide up and down is also provided on the first housing below the first friction wheel.

[0010] Furthermore, the driving mechanism includes a first threaded rod rotatably mounted on the first housing and a first limiting rod fixedly mounted thereon. A movable bracket is threadedly fitted on the first threaded rod, and the movable bracket is slidably fitted with the first limiting rod. A crossbar is fixedly mounted at the top of the movable bracket, and mounting plates are provided at both ends of the crossbar. The mounting plates are provided with slots.

[0011] Furthermore, a first pulley is rotatably mounted on the first housing. The first pulley is coaxial with and fixedly engaged with the first threaded rod. A second pulley is also rotatably mounted on the first housing. A first synchronous belt connects the first pulleys. As shown in the figure, a gearbox is mounted on the first housing. The gearbox has three sets of synchronously rotating output shafts. A drive motor is also installed inside the gearbox. The drive motor realizes the synchronous rotation of the three sets of output shafts. One set of output shafts on the gearbox is coaxial with and fixedly connected to the first pulley.

[0012] Furthermore, a second threaded rod is rotatably provided on the movable bracket, and a second limiting rod is fixedly provided on the movable bracket. A motor housing is threadedly fitted onto the second threaded rod, and the output end of the motor housing is coaxially and fixedly connected to a second friction wheel. When the gearbox is working, the second set of output shafts drives the second threaded rod to rotate.

[0013] Furthermore, a plurality of cylindrical rods are slidably provided on the second housing, a push plate is fixedly provided at one end of the plurality of cylindrical rods, a connecting rod is fixedly provided at the other end of the plurality of cylindrical rods, a first rack is fixedly provided at one end of the connecting rod, and a first gear is rotatably provided on the second housing, and the first rack meshes with the first gear for transmission.

[0014] Furthermore, a third pulley is coaxially and fixedly connected to the third output end of the gearbox, and a fourth pulley is coaxially and fixedly provided on the first gear. The third pulley and the fourth pulley are synchronously connected by a second synchronous belt.

[0015] Beneficial effects

[0016] 1. This invention features three sets of embossing and welding rollers to meet different embossing requirements. It also includes a gearbox with three output shafts, which can drive the second friction wheel upwards, the push plate laterally, and the slot laterally. The upward movement of the second friction wheel allows it to contact the first friction wheel, further rotating it. The lateral movement of the slot pulls a circular pull plate outwards, dislodging the pin from the mating end and separating the embossing and welding roller from the mounting bracket. The lateral movement of the push plate then pushes the embossing and welding roller forward onto the partition, enabling easy removal. The overall structure of the equipment is coherent, and the functions work together seamlessly, ultimately achieving easy disassembly of the embossing and welding roller, avoiding repetitive manual and mechanical disassembly and assembly, saving time, and increasing work efficiency.

[0017] 2. The present invention also drives the designated embossing and welding roller by providing a set of movable second friction wheels. The rotation of the three sets of embossing and welding rollers enables the selection of different embossing and welding rollers to meet different embossing types. The embossing and welding rollers are detachable. When one set of embossing and welding rollers is working, the other two sets of embossing and welding rollers can be repaired or maintained, avoiding downtime for maintenance and achieving continuous production. Attached Figure Description

[0018] Figure 1 This is a front view of the overall structure of the present invention; Figure 2 This is a side view of the embossing mechanism of the present invention; Figure 3 This is a schematic diagram of the embossing mechanism of the present invention; Figure 4 This is an enlarged schematic diagram of part A of the present invention; Figure 5 This is a cross-sectional view of the embossing welding roller of the present invention; Figure 6 This is a schematic diagram of the drive mechanism structure of the present invention; Figure 7 This is an enlarged schematic diagram of part B of the present invention; Figure 8 This is a schematic diagram of the installation of the second friction wheel of the present invention; Figure 9 This is a schematic diagram of the overall structure of the present invention.

[0019] Explanation of reference numerals in the attached figures: 100. Pressing platform; 200. Embossing mechanism; 300. Drive mechanism; 101. First housing; 102. Pressing table; 103. Second housing; 104. Partition plate; 201. First disc; 202. Mounting bracket; 203. Embossing welding roller; 204. First friction wheel; 205. Circular rotating shaft; 206. First spring; 207. Circular pull plate; 208. Pin; 209. Mating end; 210. Protruding shaft; 301. Motor housing; 302. Second friction wheel; 303. Gearbox; 304. 305. Second threaded rod; 306. First limit rod; 307. First threaded rod; 308. Moving bracket; 309. Crossbar; 310. Mounting plate; 311. Groove; 312. First bracket; 313. Connecting plate; 314. Second spring; 315. Push plate; 316. Cylindrical rod; 317. First rack; 318. First gear; 319. Second synchronous belt; 320. Third pulley; 321. Second pulley; 322. First synchronous belt; 323. First pulley; 324. Connecting rod. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figure 1 As shown in the figure, an ultrasonic welding device for edge pressing of sanitary napkins provided in this embodiment of the invention includes a pressing platform 100, an embossing mechanism 200 provided on the pressing platform 100, and a driving mechanism 300 provided between the embossing mechanism 200 and the pressing platform 100. The driving mechanism 300 is used to drive the embossing mechanism 200 to rotate and simultaneously assist in disassembling the embossing mechanism 200. Figure 3 As shown, the pressing platform 100 includes a first housing 101, a pressing table 102 fixedly disposed on the first housing 101, and a second housing 103 fixedly disposed at the top of the first housing 101.

[0022] In the actual production process of sanitary napkins, ultrasonic embossing welding is the mainstream processing technology. This process uses an embossing roller and simultaneously completes the two core processes of embossing and welding. The welding head of the ultrasonic welding system cooperates with the embossing roller, which has a preset pattern on its surface. The high-frequency mechanical vibration emitted by the welding head is transmitted to the contact surface of the composite layers of the sanitary napkin. Through the friction effect, local high temperatures are generated, which causes the thermoplastic materials between the layers to fuse quickly and achieve a strong weld. At the same time, the pattern on the surface of the embossing roller is simultaneously imprinted on the product surface or edge sealing position under the combined action of pressure and heat, completing the embossing process. This simultaneous embossing and welding process has several significant advantages: First, it greatly improves production efficiency by integrating two processes into one step, eliminating the need for separate embossing and secondary positioning welding, effectively shortening the production line length and processing cycle, and adapting to the demands of high-speed mass production. Second, it ensures product quality stability, with precise correspondence between the embossed pattern and welding points, avoiding positioning deviations that may occur during step-by-step processing, resulting in clear and regular embossed patterns and uniform welding strength. Third, it simplifies process control, reducing parameter adjustments required by process splitting, and lowering the defect rate during production. Fourth, it is environmentally friendly, as ultrasonic welding requires no additional adhesives, and combined with the simultaneous embossing process, it further reduces the use of auxiliary materials, meeting the requirements of green production.

[0023] like Figure 2 and Figure 3 As shown, in actual production, different types of sanitary napkins typically have different embossing requirements, necessitating the replacement of different embossing rollers for adaptation. Common welding equipment usually only has one set of embossing rollers. When different types of embossing are required, the embossing rollers need to be removed, a cumbersome process. Therefore, this embodiment provides an embossing mechanism 200 equipped with multiple sets of embossing rollers, allowing selection of different rollers according to the embossing type to meet different production needs. Specifically, the embossing mechanism 200 includes a first disc 201, which is rotatably mounted on the first housing 10. 1. A first driving source is connected to the first disk 201, which drives the first disk 201 to rotate. The first driving source includes, but is not limited to, motor drive. The driving method is a conventional technique known to those skilled in the art, and will not be described in detail here. A mounting bracket 202 is coaxially and fixedly mounted on the first disk 201. In this embodiment, the mounting bracket 202 is an isosceles triangular structure. Three sets of embossing and welding rollers 203 are arranged in a circumferential array on the mounting bracket 202. The three sets of embossing and welding rollers 203 have the same structure. Taking one set of embossing and welding rollers 203 as an example, specifically, as shown... Figure 4 and Figure 5As shown, the apex of the triangle of the mounting bracket 202 is the mounting end. A circular rotating shaft 205 is rotatably mounted on one side of the mounting end. Several first springs 206 are fixedly mounted on the circular rotating shaft 205. A circular pull plate 207 is fixedly mounted at the end of each of the first springs 206. A pin 208 is fixedly mounted at the center of the circular pull plate 207. A first friction wheel 204 is coaxially mounted and fixedly mounted on one end of the embossing and welding roller 203. A mating end 209 is coaxially mounted and fixedly mounted on the first friction wheel 204. The mating end 209 is inserted into the circular rotating shaft 205 and detachably mated with it. A protruding shaft 2 is fixedly mounted on the other end of the embossing and welding roller 203. 10. In use, insert the mating end 209 on the embossing welding roller 203 into the annular rotating shaft 205, and insert the pin 208 on the circular pull plate 207 into the insertion hole of the mating end 209. Under the action of the first spring 206, the pin 208 can achieve a tight fit with the mating end 209. Rotate the embossing welding roller 203 onto the mounting bracket 202. At this time, the embossing welding roller 203 and the annular rotating shaft 205 can achieve synchronous rotation at the pin 208. That is, driving the first friction wheel 204 on the embossing welding roller 203 to rotate will realize the rotation of the embossing welding roller 203, and the circular pull plate 207 will rotate synchronously accordingly. Figure 8 As shown, a second friction wheel 302 that can slide up and down is also provided on the first housing 101 below the first friction wheel 204. When the first disc 201 rotates, it can realize the rotation of several sets of embossing and welding rollers 203 on it. When the lowest embossing and welding roller 203 moves to the welding and pressing position (i.e. above the pressing table 102), it drives the second friction wheel 302 to move upward. The second friction wheel 302 contacts the first friction wheel 204. The rotation of the second friction wheel 302 can realize the rotation of the first friction wheel 204, and further realize the rotation of the designated embossing and welding roller 203, thus realizing the embossing and welding operations.

[0024] like Figure 2 As shown, when one set of embossing and welding rollers 203 rotates above the pressing table 102, the other two sets of embossing and welding rollers 203 are at the same height and located inside the second housing 103, as... Figure 9As shown, the second housing 103 is also provided with a partition 104, which has several slots. At this time, the two sets of embossing and welding rollers 203 are in an unused state. The two sets of embossing and welding rollers 203 can be removed and maintained. The removal method includes manually pulling the circular pull plate 207 to pull the pin 208 out of the mating end 209, separating the embossing and welding roller 203 from the mounting bracket 202, and then manually removing the embossing and welding roller 203 for repair or maintenance. The two sets of embossing and welding rollers 203 need to be manually removed and installed independently. The removal and installation process requires mechanical repetition and is quite cumbersome. Therefore, this embodiment also proposes a drive mechanism 300 to synchronously assist in the removal of the two sets of embossing and welding rollers 203. After the two sets of embossing and welding rollers 203 are separated from the mounting bracket 202, they can be pushed to the slot on the partition 104 for support. The staff only needs to take out the embossing and welding rollers 203 from the slot. Similarly, during installation, the embossing and welding rollers 203 can be automatically installed by simply placing them in the designated position.

[0025] like Figure 6 and Figure 7 As shown, the drive mechanism 300 includes a first threaded rod 307 rotatably mounted on the first housing 101, a first limiting rod 306 fixedly mounted, a movable bracket 308 threadedly fitted onto the first threaded rod 307, the movable bracket 308 slidingly fitted onto the first limiting rod 306, a crossbar 309 fixedly mounted at the top of the movable bracket 308, and mounting plates 310 at both ends of the crossbar 309. Figure 7 As shown, the mounting plate 310 has a slot 311. When the two sets of embossing and welding rollers 203 are at the same height, the circular pull plate 207 is located in the slot 311. The first housing 101 is fixedly equipped with a first bracket 312. Several sliding rods are fixedly equipped on the crossbar 309. The sliding rods slide with the top of the first bracket 312. A connecting plate 313 is fixed between two sliding rods. A second spring 314 is sleeved on both sliding rods. The second spring 314 is located between the crossbar 309 and the first bracket 312. In use, when the two sets of embossing and welding rollers 203 are at the same height, the circular pull plate 207 is located in the slot 311. The horizontal movement of the crossbar 309 enables the synchronous movement of the slot 311 on it. The slot 311 then pulls the circular pull plate 207 to move outward synchronously. The circular pull plate 207 pulls the pin 208 out of the mating end 209, separating the embossing welding roller 203 from the mounting bracket 202. When the embossing welding roller 203 is replaced, the slot 311 is in the initial position and is in a stationary state. Several embossing welding rollers 203 can move within the slot 311, allowing the embossing welding rollers 203 to move freely without interfering with the slot 311. After the rotation is completed, the slot 311 begins to move, realizing the removal of the top embossing welding roller 203.

[0026] like Figure 6As shown, the movement of the movable support 308 is achieved by the rotation of the first threaded rod 307, as... Figure 9 As shown, a first pulley 323 is rotatably mounted on the first housing 101. The first pulley 323 is coaxial with and fixedly fitted to the first threaded rod 307. A second pulley 321 is also rotatably mounted on the first housing 101. A first synchronous belt 322 connects the first pulley 323 and the second pulley 323. Figure 8 As shown, a gearbox 303 is mounted on the first housing 101. The gearbox 303 has three sets of synchronously rotating output shafts. A drive motor is also installed inside the gearbox 303. The drive motor enables the synchronous rotation of the three sets of output shafts, as shown... Figure 9 As shown, one set of output shafts on the gearbox 303 is coaxial with and fixedly connected to the first pulley 323. That is, the gearbox 303 realizes the rotation of the first threaded rod 307, further realizes the lateral movement of the movable bracket 308, and finally realizes the pulling out of the circular pull plate 207.

[0027] like Figure 6 As shown, a second threaded rod 304 is rotatably mounted on the movable bracket 308, and a second limiting rod 305 is fixedly mounted on the movable bracket 308. A motor housing 301 is threaded onto the second threaded rod 304. Figure 8 As shown, the output end of the motor housing 301 is coaxially and fixedly connected to the second friction wheel 302. The motor housing 301 can realize the rotation of the second friction wheel 302. In use, when the gearbox 303 is working, the second set of output shafts drives the second threaded rod 304 to rotate, which can realize the upward movement of the motor housing 301. That is, the motor housing 301 drives the second friction wheel 302 to move upward until the second friction wheel 302 contacts the first friction wheel 204. The second friction wheel 302 can then drive the first friction wheel 204 to rotate, and finally realize the overall rotation of the embossing welding roller 203 to carry out welding embossing work.

[0028] In use, after the embossing and welding roller 203 is separated from the mounting bracket 202, the mating end 209 of the embossing and welding roller 203 is still located inside the annular shaft 205, requiring manual removal. Therefore, this embodiment also includes a movable push plate 315 to push out the embossing and welding roller 203. Figure 9As shown, a plurality of cylindrical rods 316 are slidably arranged on the second housing 103. A push plate 315 is fixedly attached to one end of each cylindrical rod 316, and a connecting rod 324 is fixedly attached to the other end of each cylindrical rod 316. A first rack 317 is fixedly attached to one end of the connecting rod 324. A first gear 318 is rotatably arranged on the second housing 103. The first rack 317 meshes with the first gear 318 for transmission. A third pulley 320 is coaxially and fixedly connected to the third output end of the gearbox 303. A fourth pulley is coaxially and fixedly attached to the first gear 318. The third pulley 320 and the fourth pulley are synchronously connected by a second synchronous belt 319. The wheel box 303 can also rotate the first gear 318 through the second synchronous belt 319. The first rack 317 meshes with the first gear 318 to drive the cylindrical rod 316 to move laterally. The cylindrical rod 316 drives the push plate 315 to move laterally. During the lateral movement of the push plate 315, it will contact the embossing and welding roller 203 and push it towards the partition plate 104. The protruding shaft 210 on the embossing and welding roller 203 is inserted into several slots to clamp the embossing and welding roller 203. The embossing and welding roller 203 is clamped on the partition plate 104. The operator only needs to lift it upwards to remove the embossing and welding roller 203.

[0029] This invention utilizes three sets of embossing and welding rollers 203 to meet different embossing requirements. It also includes a gearbox 303 with three output shafts. The gearbox 303 can drive the second friction wheel 302 upward, the push plate 315 laterally, and the slot 311 laterally. The upward movement of the second friction wheel 302 allows it to contact the first friction wheel 204, further enabling its rotation. The lateral movement of the slot 311 pulls the circular pull plate 207 outward, causing it to pull the pin 208 out of the mating end 209, separating the embossing and welding roller 203 from the mounting bracket 202. The lateral movement of the push plate 315 then pushes the embossing and welding roller 203 forward onto the partition plate 104, allowing for easy removal. The overall structure of the equipment is coherent, and the functions work together seamlessly, ultimately enabling easy disassembly of the embossing and welding roller 203, avoiding repetitive manual and mechanical disassembly and assembly, saving time, and increasing work efficiency.

[0030] In the description of this invention, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on the invention. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "multiple" means two or more.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. An ultrasonic welding device for edge pressing of sanitary napkins, characterized in that, It includes a pressing platform (100), an embossing mechanism (200) on the pressing platform (100), and a driving mechanism (300) between the embossing mechanism (200) and the pressing platform (100). The embossing mechanism (200) includes a mounting bracket (202) rotatably mounted on a pressing platform (100), a circular shaft (205) rotatably mounted on the mounting bracket (202), a circular pull plate (207) slidably mounted on the circular shaft (205), a pin (208) fixedly mounted on the circular pull plate (207), and an embossing welding roller (203) detachably mounted inside the circular shaft (205). The embossing welding roller (203) is fixedly connected to the circular shaft (205) through the pin (208), and the embossing welding roller (203) can rotate relative to the mounting bracket (202). The drive mechanism (300) includes a slot (311) and a push plate (315) slidably disposed on the pressing platform (100). The slot (311) is used to pull the circular pull plate (207), and the push plate (315) is used to push the embossing welding roller (203).

2. The ultrasonic welding device for edge pressing of sanitary napkins as described in claim 1, characterized in that, The pressing platform (100) includes a first housing (101), a pressing table (102) is fixedly provided on the first housing (101), a second housing (103) is fixedly provided at the top of the first housing (101), and a partition (104) is provided inside the second housing (103), with a plurality of slots provided on the partition (104).

3. The ultrasonic welding device for edge pressing of sanitary napkins as described in claim 2, characterized in that, The embossing mechanism (200) includes a first disc (201), which is rotatably mounted on the first housing (101). A first driving source is connected to the first disc (201), which drives the first disc (201) to rotate. The first driving source includes, but is not limited to, a motor drive.

4. The ultrasonic welding device for edge pressing of sanitary napkins as described in claim 3, characterized in that, The first disc (201) is coaxially and fixedly provided with a mounting bracket (202). The mounting bracket (202) is an isosceles triangular structure. Three sets of embossing and welding rollers (203) are arranged in a circular array on the mounting bracket (202). The three sets of embossing and welding rollers (203) have the same structure. The apex of the triangle of the mounting bracket (202) is the mounting end. A circular rotating shaft (205) is rotatably provided on one side of the mounting end. Several first springs (206) are fixedly provided on the circular rotating shaft (205). A circular pull plate (207) is fixedly provided at the end of several first springs (206), and a pin (208) is fixedly provided at the center of the circular pull plate (207). A first friction wheel (204) is coaxially and fixedly provided on one end of the embossing welding roller (203). A mating end (209) is coaxially and fixedly provided on the first friction wheel (204). The mating end (209) is inserted into the circular rotating shaft (205). A protruding shaft (210) is fixedly provided at the other end of the embossing welding roller (203).

5. The ultrasonic welding device for edge pressing of sanitary napkins as described in claim 4, characterized in that, The first housing (101) is also provided with a second friction wheel (302) that can slide up and down below the first friction wheel (204).

6. The ultrasonic welding device for edge pressing of sanitary napkins as described in claim 2, characterized in that, The drive mechanism (300) includes a first threaded rod (307) rotatably mounted on the first housing (101) and a first limiting rod (306) fixedly mounted. A movable bracket (308) is threadedly fitted on the first threaded rod (307). The movable bracket (308) is slidably fitted with the first limiting rod (306). A crossbar (309) is fixedly mounted on the top of the movable bracket (308). Mounting plates (310) are provided at both ends of the crossbar (309). A slot (311) is provided on the mounting plate (310).

7. The ultrasonic welding device for edge pressing of sanitary napkins as described in claim 6, characterized in that, The first housing (101) is rotatably provided with a first pulley (323), which is coaxial with and fixedly engaged with the first threaded rod (307). The first housing (101) is also rotatably provided with a second pulley (321), and a first synchronous belt (322) is connected between the first pulley (323) and the first pulley (323), as shown in Figure (8). The first housing (101) is equipped with a gearbox (303), which is provided with three sets of synchronously rotating output shafts. The gearbox (303) is also provided with a set of drive motors, which realize the synchronous rotation of the three sets of output shafts. One set of output shafts on the gearbox (303) is coaxial with and fixedly connected to the first pulley (323).

8. The ultrasonic welding device for edge pressing of sanitary napkins as described in claim 7, characterized in that, The movable bracket (308) is also rotatably provided with a second threaded rod (304), and a second limiting rod (305) is fixedly provided on the movable bracket (308). A motor housing (301) is threadedly fitted on the second threaded rod (304). The output end of the motor housing (301) is coaxial and fixedly connected to a second friction wheel (302). When the gearbox (303) is working, the second set of output shafts drives the second threaded rod (304) to rotate.

9. The ultrasonic welding device for edge pressing of sanitary napkins as described in claim 8, characterized in that, The second housing (103) is slidably provided with a plurality of cylindrical rods (316), one end of the plurality of cylindrical rods (316) is fixedly provided with a push plate (315), the other end of the plurality of cylindrical rods (316) is fixedly provided with a connecting rod (324), one end of the connecting rod (324) is fixedly provided with a first rack (317), and a first gear (318) is rotatably provided on the second housing (103), and the first rack (317) meshes with the first gear (318) for transmission.

10. The ultrasonic welding device for edge pressing of sanitary napkins as described in claim 7, characterized in that, The gearbox (303) has a third pulley (320) coaxially and fixedly connected to the third output end, and a fourth pulley coaxially and fixedly provided on the first gear (318). The third pulley (320) and the fourth pulley are synchronously connected through a second synchronous belt (319).

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