Disposable sanitary product servo drive production apparatus and negative pressure transmission assembly thereof

Abstract

The application discloses a kind of disposable sanitary article servo drive production equipment and its negative pressure transmission component, it is related to transmission equipment field, including the first slot body and the second slot body of corresponding die wheel distribution in the first direction in turn, first position and second position are sequentially arranged between the die wheel and the second slot body along the first direction, and part of the area of first position is located in die wheel;The first slot body is connected with the second slot body by telescopic part, the telescopic part includes the drive part respectively arranged on the second slot body and the telescopic part on the first slot body, the drive part switching state, by the telescopic part of moving along the first direction, make the first slot body switch between first position and second position, the length adjustment of telescopic part makes the first slot body move along the first direction at first position.The application solves the problem of die changing efficiency and adjustment accuracy.

Description

Technical Field

[0001] This invention relates to the field of transmission equipment, and more particularly to a servo-driven production equipment for disposable hygiene products and its negative pressure transmission component. Background Technology

[0002] In the production of disposable hygiene products, such as sanitary napkins, diapers, and nursing pads, release paper is typically used to protect the adhesive layer or temporarily separate materials. Therefore, the release paper needs to be continuously and stably conveyed on the production line via a transport device. To prevent the release paper from warping, shifting, or shaking during transport, existing production equipment typically employs a negative pressure conveyor belt system. By setting a negative pressure chamber beneath the conveyor belt and using vacuum extraction to create an adsorption effect, the release paper adheres to the conveyor belt surface during transport, thus maintaining its positional stability and ensuring the processing accuracy of subsequent processes.

[0003] In disposable hygiene product manufacturing equipment, to adapt to the rapid switching needs of different product specifications, the conveying unit is often designed as a movable structure to free up operating space when changing molding dies. In existing technologies, movable conveying units mostly use cylinder drives combined with linear guides to achieve automated forward and backward movement, or use manual push-pull followed by bolt locking. However, these structures suffer from low mold-changing efficiency and poor adjustment accuracy in practical applications. While cylinder drives achieve automated control, their ability to maintain stability at the stop position is weak. When the equipment operates at high speed, the conveying unit's own vibration and external interference can easily cause slight displacement of its head, leading to changes in the gap between the conveyor belt and the mold receiving point, affecting the stability of material transfer. Although manual bolt locking requires no additional power source and has a simple structure, the locking and releasing operations require tools to tighten or loosen multiple bolts one by one, making the operation cumbersome and time-consuming. Especially when adjusting the extension of the conveying unit according to changes in mold specifications, the bolts must be completely loosened before movement, and after adjustment, they must be re-locked and re-verified, severely impacting mold-changing efficiency.

[0004] Therefore, a servo-driven production equipment for disposable hygiene products and its negative pressure transmission component are proposed to solve the problems of low mold changing efficiency and poor adjustment accuracy. Summary of the Invention

[0005] The purpose of this invention is to provide a servo-driven production equipment for disposable hygiene products and its negative pressure transmission component, which solves the problems of low mold-changing efficiency and poor adjustment accuracy in terms of adaptability of the equipment.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A servo-driven production equipment for disposable hygiene products and its negative pressure transmission component include a first groove and a second groove that are sequentially distributed along a first direction corresponding to a mold wheel. A first position and a second position are sequentially provided between the mold wheel and the second groove along the first direction, and a portion of the first position is located inside the mold wheel.

[0008] The first groove is connected to the second groove via a telescopic member. The telescopic member includes a driving part on the second groove and a telescopic part on the first groove. The driving part switches states, and the first groove switches between a first position and a second position by moving the telescopic part along a first direction. The length of the telescopic part is adjusted to move the first groove at the first position along the first direction.

[0009] The drive unit includes a guide block, a support arm, and a handle arm. The guide block is disposed on the second groove. The telescopic part is inserted into the guide block along a first direction. One end of the support arm is hinged to the guide block, and the other end is hinged to the handle arm. The handle arm is hinged to the telescopic part. The support arm and the handle arm rotate to move the telescopic part within the guide block along the first direction.

[0010] The telescopic part includes a connecting rod, a screw, a nut, and a connecting block. The connecting block is disposed on the first groove, and the screw is disposed on the connecting block along a first direction. The connecting rod is inserted into the guide block. The end of the connecting rod near the screw is rotatably connected to the nut, and the end of the connecting rod has a groove along the first direction. The end of the screw away from the connecting block passes through the nut and extends into the groove. The nut is threadedly connected to the screw. The rotation of the nut causes the first groove to move along the first direction at a first position through the screw.

[0011] When the first trough is in the first position, a telescopic zone is formed between the first trough and the second trough. Rollers are provided on both the first trough and the second trough. The rollers are connected to the conveyor belt. The conveyor belt covers the first trough, the second trough and the telescopic zone. The negative pressure intensity in the first trough and the second trough is the same. The second trough is connected to the telescopic zone, so that the negative pressure intensity at the corresponding parts of the conveyor belt is the same. The conveyor belt adsorbs the material being transported on the conveyor belt through negative pressure.

[0012] An air guide cylinder is provided on the first trough along the first direction at the telescopic zone. The air guide cylinder is in contact with the conveyor belt, and an air guide hole is opened on the side of the air guide cylinder near the conveyor belt. The air guide hole communicates with the internal space of the second trough through the internal space of the air guide cylinder. The end of the air guide cylinder away from the first trough extends through and into the second trough. The internal space of the air guide cylinder is in communication with the internal space of the second trough, and the negative pressure intensity of the air guide cylinder is the same as the negative pressure intensity of the internal space of the second trough. The length of the air guide cylinder in the second trough is greater than the distance that the first trough moves at the first position.

[0013] The first groove is provided with a guide post along the first direction, and the second groove is provided with a sliding sleeve, with the guide post inserted into the sliding sleeve.

[0014] The second tank has an opening a, and a sealing plate and a second air pipe are provided at the corresponding position on the second tank. The second air pipe draws air through the opening a to create negative pressure in the second tank. The sealing plate moves to open or close the opening a.

[0015] The second air tube is provided with a U-shaped first mounting plate at the suction end. The sealing plate is inserted into the first mounting plate. The second groove is provided with a U-shaped second mounting plate at the corresponding opening a. The first mounting plate is connected to the second mounting plate. The internal spaces of the first mounting plate and the second mounting plate form a connecting space, connecting the second air tube to the opening a. When the sealing plate is inserted into the first mounting plate, the sealing plate seals the connecting space.

[0016] The second tank has an opening b, and an air intake plate is provided on the second tank at the position corresponding to the opening b. An adjustment plate is rotatably connected to the air intake plate. The air intake plate and the adjustment plate have air intake holes a and b respectively. When the air intake holes a and b are aligned, an air intake channel is formed. External air enters the second tank through the air intake channel. When the distance between the air intake holes a and b increases, the cross-section of the air intake channel decreases.

[0017] A servo-driven production equipment for disposable hygiene products, the servo-driven production equipment for disposable hygiene products including the negative pressure transmission component as described above.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This invention provides a servo-driven production equipment for disposable hygiene products and its negative pressure transmission component. The transmission component is configured as a first groove and a second groove sequentially distributed along a first direction corresponding to a mold wheel. A first position and a second position are set between the mold wheel and the second groove along the first direction, allowing a portion of the first position to extend into the mold wheel for material transfer. Simultaneously, a telescopic component connects the first groove and the second groove, with a drive unit and a telescopic unit respectively disposed within the telescopic component. This allows the operator to switch the state of the drive unit to move the telescopic unit along the first direction, rapidly switching the first groove between the first and second positions. This facilitates mold changes. By providing ample operating space, the problem of low mold-changing efficiency caused by the need to tighten or loosen multiple bolts one by one using tools in the existing manual bolt tightening method is solved. On this basis, when the first groove is in the first position, by adjusting the length of the telescopic part to move it slightly in the first direction, the fit clearance between the first groove and the mold wheel can be precisely controlled to adapt to different mold specifications or compensate for deviations caused by wear. This solves the problem that the existing cylinder drive method is prone to slight displacement of the conveying unit head due to equipment vibration, which affects the stability of material transfer. Finally, while ensuring the stability of the working position, the mold-changing efficiency and adjustment accuracy are improved simultaneously. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0022] Figure 1 This is a schematic diagram showing the overall layout of the invention;

[0023] Figure 2 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 3 This is a top view of the structure of the first groove in this invention;

[0025] Figure 4 This is a front view structural diagram of the first groove in this invention;

[0026] Figure 5 This is a schematic diagram of the internal structure of the first tank in this invention;

[0027] Figure 6 This is a schematic diagram of the connection structure between the connecting rod and the guide block in this invention;

[0028] Figure 7 This is a cross-sectional view of the connecting rod in this invention;

[0029] Figure 8 This is a schematic diagram of the disassembled structure of the air intake plate and the control plate in this invention.

[0030] Illustration: 1. First trough; 11. First position; 12. Second position; 2. Second trough; 21. Through port a; 211. Second air pipe; 212. Sealing plate; 213. First mounting plate; 214. Second mounting plate; 22. Through port b; 221. Air inlet plate; 222. Air inlet a; 223. Control plate; 224. Air inlet b; 3. Mold wheel; 4. Telescopic component; 41. Drive unit; 411. Guide block; 412. Support arm; 413. Handle arm; 42. Telescopic part; 421. Connecting rod; 422. Groove; 423. Screw; 424. Nut; 425. Connecting block; 5. Telescopic area; 51. Air guide cylinder; 52. Air guide hole; 6. Roller; 7. Conveyor belt; 8. Guide column; 9. Sliding sleeve. Detailed Implementation

[0031] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0032] In the description of this invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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 be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component positioned centrally in the connection.

[0033] Example 1:

[0034] Please see Figures 1-8The negative pressure transmission component of a disposable hygiene product servo drive production equipment in this embodiment includes a first groove 1 and a second groove 2 that are sequentially distributed along a first direction corresponding to a mold wheel 3. A first position 11 and a second position 12 are sequentially provided between the mold wheel 3 and the second groove 2 along the first direction, and a portion of the first position 11 is located inside the mold wheel 3.

[0035] The first groove 1 is connected to the second groove 2 via a telescopic member 4. The telescopic member 4 includes a driving part 41 disposed on the second groove 2 and a telescopic part 42 disposed on the first groove 1. The driving part 41 switches states and the first groove 1 is switched between a first position 11 and a second position 12 by the telescopic part 42 moving along a first direction. The length adjustment of the telescopic part 42 causes the first groove 1 to move along the first direction at the first position 11.

[0036] The efficient switching and precise adjustment of the conveying unit position are achieved through the cooperation of the first trough 1 and the second trough 2. Specifically, the drive unit 41 switches the state to move the telescopic part 42 along the first direction, driving the first trough 1 to move from the first position 11 that extends into the mold wheel 3 to the second position 12 that is completely separated from the mold wheel 3, thereby making enough space for mold changing. After the mold is changed, the drive unit 41 resets the first trough 1 to the first position 11, ensuring that the conveyor belt can extend into the mold to achieve non-destructive material transfer. Based on this, when the mold wheel 3 is replaced and the first groove 1 is in the first position 11, the length of the telescopic part 42 can be adjusted to make it move slightly along the first direction, thereby precisely controlling the fit clearance between the first groove 1 and the mold wheel 3 to adapt to different mold specifications or compensate for deviations caused by wear. Under the action of the above components, the problems of low mold changing efficiency and poor adjustment accuracy are effectively solved. Specifically, compared with the cylinder drive method, its mechanical switching and locking structure can avoid the displacement of the first groove 1 caused by the vibration generated by the high-speed operation of the equipment, thereby ensuring the long-term stability of the working position. Compared with the manual bolt locking method, it can complete the quick switching without the aid of tools, and can be fine-tuned in the locked state, saving the tedious steps of repeatedly loosening, locking and checking, and significantly improving the mold changing efficiency and the precision of adjustment.

[0037] The first groove 1 and the second groove 2 are sequentially distributed along the first direction corresponding to the mold wheel 3, and a portion of the first position 11 is located within the mold wheel 3. This layout establishes two distinct positional states for the transmission component between extending into the mold for material transfer and retracting to create space for mold changing. The first groove 1 is connected to the second groove 2 via the telescopic component 4, enabling relative movement between the two and providing a motion basis for position switching. The drive unit 41 and the telescopic component 42 are respectively disposed on the second groove 2 and the first groove 1. By switching the state of the drive unit 41, the telescopic component 42 moves along the first direction, achieving coarse positioning switching of the first groove 1 between the first position 11 and the second position 12. Simultaneously, adjusting the length of the telescopic component 42 allows the first groove 1 to move along the first direction at the first position 11, achieving fine correction of the clearance with the mold.

[0038] By employing two independent, separate structures—the first tank 1 and the second tank 2—the contradiction between the precision of the movable transfer component and the mold, as well as the continuity of negative pressure, is resolved. In the disposable hygiene product production line, the transfer component needs to extend into the mold wheel 3 to achieve non-destructive material transfer. However, when changing the mold, the entire component must be retracted to make room for operation. If a single, integral tank is used, the weight of the moving part would be too large, leading to increased load on the drive mechanism, difficulty in controlling the inertia, and significant positioning deviations due to frequent forward and backward movements, affecting reset accuracy. By dividing the transfer component into the first tank 1 and the second tank 2, and making the first tank 1 an independent moving part connected to the second tank 2 via a telescopic component 4, the first tank 1 can be kept lightweight while the second tank 2 remains fixed and stably connected to the external negative pressure pipeline, thus maintaining the continuity of the negative pressure system during movement. In addition, when the first groove 1 extends into the mold wheel 3, it needs to be precisely adjusted in position according to the mold specifications. The second groove 2, as a fixed reference, can provide stable support for the telescopic part 4, avoiding reference drift caused by overall movement, and making the fine adjustment operation have higher repeatability.

[0039] In a specific embodiment, such as Figure 5 As shown, a guide post 8 is provided on the first groove 1 along the first direction, and a sliding sleeve 9 is provided on the second groove 2, with the guide post 8 inserted into the sliding sleeve 9.

[0040] By setting guide posts 8 along the first direction on the first groove 1 and correspondingly setting sliding sleeves 9 on the second groove 2, the guide posts 8 are slidably inserted into the sliding sleeves 9, thereby forming a guiding mechanism for the first groove 1 to move relative to the second groove 2. Specifically, when the drive unit 41 switches states to cause the telescopic unit 42 to drive the first groove 1 to move between the first position 11 and the second position 12, or when the length of the telescopic unit 42 is adjusted to cause the first groove 1 to move slightly at the first position 11, the guide posts 8 always slide along the first direction within the sliding sleeves 9, restricting the degree of freedom of the first groove 1 in other directions, and ensuring the straightness of its movement trajectory and the stability of its posture. The above structure, through the cooperation of the guide posts 8 and the sliding sleeves 9, ensures that the first groove 1 always maintains an accurate direction of movement when switching positions, and will not deviate even with frequent movement, thereby simplifying the reset operation and shortening the mold change time, and avoiding adjustment errors caused by deviations in the movement trajectory.

[0041] Example 2:

[0042] The basic content is the same as in Example 1, except that:

[0043] Please see Figure 6 and Figure 7 In this embodiment, the driving unit 41 includes a guide block 411, a support arm 412, and a handle arm 413. The guide block 411 is disposed on the second groove 2. The telescopic part 42 is inserted into the guide block 411 along a first direction. One end of the support arm 412 is hinged to the guide block 411, and the other end is hinged to the handle arm 413. The handle arm 413 is hinged to the telescopic part 42. The support arm 412 and the handle arm 413 rotate to move the telescopic part 42 within the guide block 411 along the first direction.

[0044] The drive unit uses a linkage transmission mechanism to switch the position of the first slot 1. Its specific structure includes a guide block 411, a support arm 412, and a handle arm 413 set on the second slot 2. The telescopic part 42 is inserted into the guide block 411 along the first direction to obtain movement guidance. One end of the support arm 412 is hinged to the guide block 411 and the other end is hinged to the handle arm 413. At the same time, the handle arm 413 is hinged to the telescopic part 42. When the operator moves the handle arm 413, the support arm 412 and the handle arm 413 rotate relative to each other around the hinge point, converting the rotational motion into the linear movement of the telescopic part 42 in the guide block 411 along the first direction, thereby driving the first slot 1 to switch quickly between the first position 11 and the second position 12. Compared to the cumbersome operation of manually tightening bolts by using tools to tighten or loosen multiple bolts one by one, the above structure can complete the locking and releasing with a single handle, greatly simplifying the operation steps. Moreover, the linkage mechanism can form a self-locking mechanism when rotating to the limit position, ensuring that the first groove 1 is stable and reliable in the working position, without worrying about loosening due to equipment vibration. At the same time, since the switching process does not require complete separation of the telescopic part 42 and the guide block 411, there is no need to realign during reset, further shortening the mold changing time. Thus, efficient switching of the conveying unit is achieved while ensuring the reliability of locking.

[0045] The drive unit consists of a linkage mechanism composed of a guide block 411, a support arm 412, and a handle arm 413. This mechanism reduces manufacturing difficulty and keeps costs under control. The assembly process is simple and quick. If wear occurs during use, only the corresponding parts need to be replaced for repair. Maintenance costs are low and no professional technicians are required. Furthermore, the state of this mechanism corresponds one-to-one with the position of the handle arm 413. Operators can intuitively determine whether the first groove 1 is locked or released by observing the angle of the handle arm 413, without the need for additional detection components, thus avoiding safety hazards caused by misoperation. Meanwhile, the rotational motion is efficiently converted into linear motion of the telescopic part 42 through the hinge, making the operation smooth, direct and responsive. It can achieve a large stroke of motion transmission in a limited space, avoiding the large installation space required by using long-stroke cylinders or linear motors, which is conducive to the overall compact design of the equipment. In addition, the reasonable length ratio of the support arm 412 to the handle arm 413 can achieve a significant force amplification effect, so that the operator can easily push the first tank 1 and its accessories even when facing a certain weight. It fully considers the requirements of ergonomics. When the support arm 412 and the handle arm 413 are rotated to a specific angle, the drive part 41 can generate a self-locking effect to ensure that the first tank 1 remains stable when subjected to the vibration of the equipment operation in the working position, without the need to add additional locking elements.

[0046] The telescopic part 42 includes a connecting rod 421, a screw 423, a nut 424, and a connecting block 425. The connecting block 425 is disposed on the first groove 1. The screw 423 is disposed on the connecting block 425 along a first direction. The connecting rod 421 is inserted into the guide block 411. The end of the connecting rod 421 near the screw 423 is rotatably connected to the nut 424, and the end of the connecting rod 421 has a groove 422 along the first direction. The end of the screw 423 away from the connecting block 425 passes through the nut 424 and extends into the groove 422. The nut 424 is threadedly connected to the screw 423. The rotation of the nut 424 causes the first groove 1 to move along the first direction at the first position 11 via the screw 423.

[0047] The telescopic part 42, through the cooperation of the connecting rod 421, screw 423, nut 424 and connecting block 425, realizes the micro-movement function of the first groove 1 at the first position 11. When the operator rotates the nut 424, the connecting rod 421 is restricted by the guide block 411 and can only slide along the first direction and cannot rotate. The rotational movement of the nut 424 is converted into the linear movement of the screw 423 along the first direction, which in turn drives the first groove 1 to move synchronously through the connecting block 425, realizing the precise displacement adjustment of its first position 11. The above structure effectively solves the problem of poor adjustment accuracy. Specifically, in the manual bolt locking method, if it is necessary to fine-tune the fit gap between the conveying unit and the mold, the locking bolt must be completely loosened. The movable unit of the bolt is prone to slight displacement due to the locking force when it is adjusted and re-locked, making it difficult to accurately control the final gap. However, this structure uses a threaded transmission mechanism composed of nut 424 and screw 423, which allows the operator to achieve micro-feed adjustment by rotating nut 424 while the first groove 1 is kept locked. The adjustment process is smooth and controllable, and the adjustment amount can be accurately sensed. At the same time, the design of the groove 422 provides clearance for the movement of screw 423, avoiding motion interference. The cooperation between connecting rod 421 and guide block 411 ensures the straightness of the movement direction of the first groove 1 during the adjustment process. Finally, it achieves the technical effect of high-precision position correction without loosening the lock.

[0048] The telescopic part 42 is composed of a connecting rod 421, a screw 423, a nut 424, and a connecting block 425. The connecting rod 421 is inserted into the guide block 411 for guidance, and the connecting block 425 is positioned on the first groove 1 as a fixed fulcrum, so that the screw 423 is fixed to the connecting block 425 along the first direction. Simultaneously, the end of the connecting rod 421 near the screw 423 is rotatably connected to the nut 424, and this end has a groove 422 along the first direction for the screw 423 to extend into, thus forming a compact threaded adjustment system. In this structure, when the operator rotates the nut 424, since the nut 424 is rotatably connected to the end of the connecting rod 421 and threadedly engaged with the screw 423, the screw 423 generates an axial displacement relative to the nut 424 under the thread drive. This displacement, in turn, drives the first groove 1 to move slightly along the first direction through the connecting block 425. During this process, the groove 422 provides space for the extension and retraction of the screw 423, ensuring that the end of the screw 423 does not interfere with the connecting rod 421 during the adjustment process, thus making the adjustment smooth and unobstructed. This threaded adjustment method enables stepless fine adjustment. Operators can precisely control the displacement of the first groove 1 by controlling the rotation angle of the nut 424, ensuring the ideal fit clearance between the first groove 1 and the mold wheel 3. Its adjustment accuracy is far superior to adjustments relying on tapping or rough pushing and pulling. Furthermore, due to the self-locking characteristic of the threaded fit, the nut 424 remains stationary after adjustment, preventing loosening due to equipment vibration and ensuring the long-term stability of the first groove 1 in its working position. In addition, the linkage mechanism between the telescopic part 42 and the drive part 41 works independently yet collaboratively. When the first groove 1 is in the first position 11, the operator does not need to loosen the nut. With the drive unit 41 locked, the nut 424 can be directly rotated for fine-tuning, avoiding the tedious operation of repeatedly loosening and tightening, significantly improving debugging efficiency. At the same time, the structure is mainly composed of standard threaded parts such as connecting rod 421, screw 423, and nut 424. The parts are highly interchangeable, the processing and assembly are simple, and the manufacturing cost is low. If thread wear occurs during use, the accuracy can be restored simply by replacing the corresponding screw 423 or nut 424, making maintenance convenient. It realizes precise control of the insertion amount of the first groove 1 in the working position, effectively solving the problem of working gap compensation caused by differences in mold specifications or wear, and ensuring the stability and reliability of material transfer.

[0049] Example 3:

[0050] The basic content is the same as in Examples 1 and 2, except that:

[0051] Please see Figure 3 and Figure 5In this embodiment, when the first trough 1 is located at the first position 11, a telescopic zone 5 is formed between the first trough 1 and the second trough 2. Rollers 6 are provided on both the first trough 1 and the second trough 2. The rollers 6 are connected to the conveyor belt 7. The conveyor belt 7 covers the first trough 1, the second trough 2 and the telescopic zone 5. The negative pressure intensity in the first trough 1 and the second trough 2 is the same. The second trough 2 is connected to the telescopic zone 5, so that the negative pressure intensity at the corresponding parts of the conveyor belt 7 is the same. The conveyor belt 7 adsorbs the material conveyed on the conveyor belt 7 through negative pressure.

[0052] When the first groove 1 is in the first position 11 of the mold wheel 3, a gap naturally forms between the first groove 1 and the second groove 2 due to the movement requirement, serving as the expansion zone 5. The conveyor belt 7, driven by the roller 6, continuously covers the area above the first groove 1, the expansion zone 5, and the second groove 2. Since the internal space of the second groove 2 is connected to the expansion zone 5, the negative pressure inside the second groove 2 can extend to the corresponding position of the expansion zone 5, thereby giving the conveyor belt 7 above the expansion zone 5 the same adsorption force as the first groove 1 and the second groove 2. Ultimately, the conveyor belt 7 uses uniform negative pressure to stably adsorb the material onto the surface for transport. This structure effectively solves the problems of low mold changing efficiency and poor adjustment accuracy. Specifically, in the prior art, if a mobile conveyor is used… In this unit, when the first tank 1 retracts to make room for mold changing and then resets, there is often a problem of negative pressure attenuation or discontinuous adsorption force at the joint between it and the second tank 2. This causes the material to tilt or shift when crossing this area, affecting the stability of the transmission. This structure connects the telescopic zone 5 with the second tank 2, ensuring that the negative pressure intensity of the telescopic zone 5 corresponding to the conveyor belt 7 remains consistent with both sides, regardless of whether the first tank 1 is in the first position 11 or after a slight change in position after fine adjustment. This eliminates the adsorption blind zone caused by the moving gap, allowing the material to be uniformly and stably adsorbed along the entire transmission path. This not only ensures the conveying accuracy under high-speed operation, but also provides a reliable working premise for the rapid switching and precise fine adjustment of the first tank 1.

[0053] By covering the entire telescopic zone 5 with the conveyor belt 7, continuous material transport is ensured when crossing the gap between the first trough 1 and the second trough 2, avoiding material accumulation or pulling caused by interruptions. Simultaneously, by connecting the second trough 2 to the telescopic zone 5, the continuity of negative pressure is achieved, ensuring that the corresponding section of the conveyor belt 7 in the telescopic zone 5 also possesses adsorption capacity. When material enters the telescopic zone 5 from the area of ​​the first trough 1 and transitions to the area of ​​the second trough 2, it is always subjected to uniform negative pressure adsorption, preventing tilting or displacement due to interruption of negative pressure, thus ensuring the positional stability of the material throughout the entire transport path. Furthermore, because the negative pressure intensity is the same in the first trough 1 and the second trough 2, and the telescopic zone 5 is connected to the second trough 2, the adsorption force of the conveyor belt 7 is consistent across all areas, ensuring that the material... The force is uniform during transmission, avoiding local deformation or stretching caused by differences in adsorption force. When the first tank 1 switches between the first position 11 and the second position 12, the length of the telescopic zone 5 will change. However, since the conveyor belt 7 always maintains coverage and the negative pressure is continuous, the movement of the first tank 1 will not affect the stable conveying of materials. Even if the first tank 1 is slightly adjusted under the drive of the telescopic part 42, the negative pressure adsorption function in the telescopic zone 5 will still operate normally, ensuring that the materials will not fall off the conveyor belt 7 during the adjustment process. This achieves the technical effect of maintaining the continuity and uniformity of negative pressure adsorption in the movable transmission component, avoiding the problem of adsorption interruption or material instability caused by the movement of the tank. It provides a reliable guarantee for the stable operation of the first tank 1 at the material receiving position of the mold wheel 3.

[0054] Furthermore, an air guide cylinder 51 is provided on the first trough 1 along the first direction at the telescopic zone 5. The air guide cylinder 51 is in contact with the conveyor belt 7, and an air guide hole 52 is opened on the side of the air guide cylinder 51 close to the conveyor belt 7. The air guide hole 52 communicates with the internal space of the second trough 2 through the internal space of the air guide cylinder 51. The end of the air guide cylinder 51 away from the first trough 1 passes through and extends into the second trough 2. The internal space of the air guide cylinder 51 communicates with the internal space of the second trough 2, and the negative pressure intensity of the air guide cylinder 51 is the same as the negative pressure intensity of the internal space of the second trough 2. The length of the air guide cylinder 51 in the second trough 2 is greater than the distance that the first trough 1 moves at the first position 11.

[0055] By installing an air guide cylinder 51 on the first trough 1, the problem of interruption or attenuation of negative pressure in the telescopic zone 5 during movement is solved. Specifically, the air guide cylinder 51 is fixed to the first trough 1 and extends along the first direction. One end is located at the telescopic zone 5 and fits against the conveyor belt 7, with an air guide hole 52. The other end penetrates and extends into the interior of the second trough 2, keeping the interior space of the air guide cylinder 51 connected to the interior space of the second trough 2. When the second trough 2 generates negative pressure through air extraction, the negative pressure is transmitted through the interior of the air guide cylinder 51 to the air guide hole 52, so that the part of the conveyor belt 7 corresponding to the telescopic zone 5 obtains the same negative pressure intensity as the interior of the second trough 2. At the same time, the length of the air guide cylinder 51 inside the second trough 2 is designed to be greater than that of the first trough 1. The maximum distance moved at the first position 11 ensures that the air guide tube 51 remains connected to the second tank 2 regardless of how the first tank 1 moves within the fine-tuning range. This structure avoids the need for reconnection or leakage of the negative pressure pipeline in the telescopic zone 5 due to position adjustments of the transmission components in the traditional manual bolt tightening method, which affects the stability of material adsorption. Through the follow-up design and length redundancy of the air guide tube 51, this structure ensures that the negative pressure adsorption force at the telescopic zone 5 remains constant when the first tank 1 is quickly switched or slightly adjusted, avoiding material offset or conveying interruption caused by negative pressure fluctuations. Thus, while achieving efficient mold changing and precise fine-tuning, it ensures the continuity of the production process and product consistency.

[0056] By attaching the air guide cylinder 51 to the conveyor belt 7 and opening air guide holes 52 on the bonding surface, the negative pressure can be directly applied to the part of the conveyor belt 7 corresponding to the telescopic zone 5. This avoids the attenuation of adsorption force caused by the gap between the conveyor belt 7 and the trough. At the same time, since the internal space of the air guide cylinder 51 is directly connected to the internal space of the second trough 2, the negative pressure intensity in the air guide cylinder 51 is completely consistent with that in the second trough 2. This ensures that the adsorption force at the part of the conveyor belt 7 corresponding to the telescopic zone 5 is the same as that in the area of ​​the second trough 2. This allows the material to be uniformly and sufficiently adsorbed by negative pressure when passing through the telescopic zone 5, preventing it from tilting or shifting due to insufficient adsorption force. In addition, one end of the air guide cylinder 51 is inserted into the second trough 2, and its length within the second trough 2 is greater than that of the first trough 1. The distance of movement; when the first tank 1 is slightly adjusted at the first position 11 under the drive of the telescopic part 42, the part of the air guide tube 51 located in the second tank 2 always maintains a sufficient length to ensure that the communication between the air guide tube 51 and the second tank 2 is not interrupted due to the movement of the first tank 1. Even if the distance of the first tank 1 is switched between the first position 11 and the second position 12, the air guide tube 51 will not fall out of the second tank 2, ensuring that the telescopic area 5 always maintains communication with the second tank 2 and maintains the same negative pressure intensity in any working state. This achieves the technical effect of maintaining continuous and stable negative pressure adsorption of the telescopic area 5 in the movable transmission component without being affected by movement, providing a reliable guarantee for the stable transmission of materials when crossing the gap between tanks.

[0057] It should be noted that the conveyor belt 7 has evenly distributed air holes and has elastic force; when the first trough 1 is displaced at the first position 11, the elastic force of the conveyor belt 7 can make the conveyor belt 7 stably adhere to the first trough 1, the second trough 2 and the air guide cylinder 51 when it is driven by the roller body 6.

[0058] Example 4:

[0059] The basic content is the same as in Example 1, except that:

[0060] Please see Figure 5 and Figure 7 In this embodiment, the second tank 2 is provided with an opening a21. A sealing plate 212 and a second air pipe 211 are provided on the second tank 2 at the position corresponding to the opening a21. The second air pipe 211 draws air through the opening a21 to generate negative pressure in the second tank 2. The sealing plate 212 moves to open or close the opening a21.

[0061] By opening an opening a21 in the second tank 2 and installing a sealing plate 212 and a second air pipe 211 at the corresponding positions, independent control of the generation and cutoff of negative pressure is achieved. The second air pipe 211 continuously draws air through the opening a21 to create a negative pressure environment inside the second tank 2. The sealing plate 212 can selectively open or close the opening a21 by moving. When the sealing plate 212 closes the opening a21, the air extraction path is blocked, and the negative pressure inside the second tank 2 disappears. When the sealing plate 212 opens the opening a21, the air extraction path is restored, and the negative pressure is re-established. This structure achieves independent control through the sealing plate 212. The negative pressure can be quickly cut off before mold changing, so that the internal pressure of the first tank 1 and the second tank 2 can be restored to normal, thereby eliminating the binding of the transmission components by the negative pressure adsorption. This allows the operator to easily push the first tank 1 back to the second position 12, significantly improving the smoothness and efficiency of the mold changing operation. At the same time, when the first tank 1 is reset and made with minor adjustments, the state of the sealing plate 212 can be controlled to avoid the negative pressure fluctuation from interfering with the adjustment accuracy, ensuring that the fit gap between the first tank 1 and the mold wheel 3 can be stably maintained within the ideal range. Ultimately, this improves the convenience of operation while ensuring the accuracy and reliability of the equipment operation.

[0062] The reason for moving the opening and closing port a21 by the sealing plate 212 is based on the consideration of maintaining the negative pressure stability of the second tank 2. If the air extraction source of the second air pipe 211 is directly closed, the negative pressure inside the entire second tank 2 will completely disappear, and the material adsorption function of its corresponding transmission area will be lost. In actual production, the first tank 1 may need to be moved frequently due to mold changing or adjustment, but the second tank 2, as an independent negative pressure area, usually still needs to maintain normal working status to continue to transport materials. Therefore, the negative pressure stability of the second tank 2 itself should not be affected by the switching needs of the first tank 1.

[0063] Furthermore, the second air pipe 211 is provided with a U-shaped first mounting plate 213 at the air extraction end, and the sealing plate 212 is inserted into the first mounting plate 213. The second groove 2 is provided with a U-shaped second mounting plate 214 at the corresponding opening a21. The first mounting plate 213 and the second mounting plate 214 are connected, and the internal spaces of the first mounting plate 213 and the second mounting plate 214 form a connecting space, connecting the second air pipe 211 with the opening a21. When the sealing plate 212 is inserted into the first mounting plate 213, the sealing plate 212 seals the connecting space.

[0064] By setting a U-shaped first mounting plate 213 at the air extraction end of the second air pipe 211 and inserting a sealing plate 212 into the first mounting plate 213, and setting a U-shaped second mounting plate 214 at the corresponding opening a21 on the second groove 2, the first mounting plate 213 and the second mounting plate 214 are connected to each other, and their internal spaces together form a connecting space, thereby connecting the second air pipe 211 with the opening a21. When the sealing plate 212 is inserted into the first mounting plate 213, the sealing plate 212 just blocks the connecting space, blocking the airflow channel between the second air pipe 211 and the opening a21. Conversely, pulling out the sealing plate 212 restores the connection space. By controlling the opening and closing of the pluggable sealing plate 212, the negative pressure inside the second groove 2 can be opened and closed. The independently designed sealing plate 212 can quickly cut off the negative pressure before the first tank 1 moves, preventing the negative pressure from affecting the smoothness of the movement operation. At the same time, the cooperation between the U-shaped first mounting plate 213 and the U-shaped second mounting plate 214 forms a stable sealed connection space, making the insertion and removal of the sealing plate 212 simple and quick. The negative pressure switching can be completed without the aid of tools, thereby reducing the auxiliary operation steps in the mold changing process. In addition, the sealing plate 212 inserted into the first mounting plate 213 ensures the accuracy of the sealing position and the reliability of the seal, avoiding the problem of unstable subsequent adsorption effect due to negative pressure leakage. Ultimately, while improving the mold changing efficiency, it also ensures the controllability and working stability of the negative pressure system.

[0065] When the sealing plate 212 is inserted into the first mounting plate 213, the sealing plate 212 seals the connection space, blocking the air passage between the second air pipe 211 and the port a21. When the sealing plate 212 is pulled out, the connection space is restored to unobstructed flow, and the second air pipe 211 draws air into the second tank 2 through the port a21. This structure, through the cooperation of the U-shaped mounting plate and the U-shaped mounting plate, achieves rapid on / off control of the air passage without disassembling the pipeline. The way the sealing plate 212 is inserted into the U-shaped mounting plate makes the operation extremely simple, requiring only an insertion and removal action to complete the switching, avoiding the rotation or levering operation required by valve control. At the same time, the U-shaped structure limits and guides the sealing plate 212, ensuring that it can accurately seal the connection space after insertion. The U-shaped second mounting plate 214 provides a stable sealing boundary for the connection space, preventing gas leakage from the mounting plate connection. The sealing plate 212 structure at the inlet a21 is mainly used to control the opening and closing of the negative pressure. It is suitable for scenarios where the negative pressure needs to be completely cut off or connected, such as when the equipment is stopped or when a specific workstation needs to pause adsorption.

[0066] Furthermore, the second groove 2 has an opening b22, and an air inlet plate 221 is provided on the second groove 2 at the position corresponding to the opening b22. An adjustment plate 223 is rotatably connected to the air inlet plate 221. The air inlet plate 221 and the adjustment plate 223 have air inlet holes a222 and b224 respectively. When the air inlet holes a222 and b224 are aligned, an air intake channel is formed. External air enters the second groove 2 through the air intake channel. When the distance between the air inlet holes a222 and b224 increases, the cross-section of the air intake channel decreases.

[0067] When it is necessary to adjust the negative pressure intensity inside the second tank 2, the operator rotates the control plate 223 to change the position of the air inlet b224 relative to the air inlet a222. When the air inlet a222 and the air inlet b224 are fully aligned, they form the air intake channel with the largest cross-section. External air enters the second tank 2 through this channel, thereby reducing the negative pressure intensity inside the tank. As the control plate 223 continues to rotate, increasing the relative distance between the air inlet a222 and the air inlet b224, the cross-section of the air intake channel gradually decreases, and the amount of air entering decreases accordingly, thereby gradually increasing the negative pressure intensity inside the second tank 2. By controlling the rotation angle of the control plate 223, stepless adjustment of the negative pressure intensity can be achieved. In the prior art, the negative pressure intensity of the conveying unit... Typically, negative pressure is controlled by external valves, making it impossible to quickly adjust localized negative pressure according to different mold specifications or material characteristics. Changing the negative pressure requires stopping the machine, severely impacting mold changing efficiency. This new structure, through the cooperation of the air inlet plate 221 and the control plate 223, allows operators to directly rotate the control plate 223 while the equipment is running to quickly adjust the air intake at the inlet b22, thereby changing the negative pressure intensity in the corresponding area inside the second tank 2 to adapt to the material connection stability requirements of different molds. At the same time, the rotation adjustment method enables precise control of negative pressure intensity, avoiding material deformation due to excessive negative pressure or unstable adsorption due to insufficient negative pressure. Ultimately, while ensuring transmission stability, it improves the equipment's adaptability to different product specifications and its debugging efficiency.

[0068] When the control plate 223 rotates to fully align the air inlet a222 with the air inlet b224, they form the air intake channel with the largest cross-section. External air enters the second tank 2 through this channel, reducing the negative pressure intensity inside the second tank 2. As the control plate 223 continues to rotate, increasing the relative distance between the air inlet a222 and the air inlet b224, the cross-section of the air intake channel gradually decreases, and the amount of air entering decreases accordingly, thereby gradually increasing the negative pressure intensity. This structure achieves stepless adjustment of the air intake volume by rotating the control plate 223. The adjustment method is intuitive and continuous. The operator can precisely control the magnitude of the negative pressure intensity by controlling the rotation angle of the control plate 223. Both the air inlet plate 221 and the control plate 223 are flat structures, which are simple to process and manufacture and have low cost. The relative position of the two is changed by rotating the connection, avoiding the complex internal flow channels and precision fitting parts required by using needle valves or proportional valves. At the same time, the adjustment method of aligning the openings makes the change in air intake volume correspond to the rotation angle, which makes it easy for the operator to quickly adjust to the required position based on experience or calibration scale. The control plate 223 structure at the port b22 is used for fine adjustment of negative pressure intensity, and is suitable for scenarios where the adsorption force needs to be adjusted according to different material characteristics or mold specifications.

[0069] By setting a sealing plate 212, an air inlet plate 221, and a regulating plate 223 at inlets a21 and b22, operators can flexibly control the negative pressure state inside the second tank 2 according to actual needs. This achieves both rapid on / off switching of negative pressure and continuous adjustment of negative pressure intensity, ultimately providing a reliable guarantee for the stable adsorption of materials during the transmission process. At the same time, it avoids the structural complexity and operational cumbersomeness caused by setting multiple independent valves to meet different adjustment needs.

[0070] It should be noted that the first air pipe is synchronously provided on the first tank 1 corresponding to the second air pipe 211 on the second tank 2, and the first tank 1 and the second tank 2 are respectively formed by the independent air extraction of the first air pipe and the second air pipe 211 to create negative pressure.

[0071] Example 5:

[0072] In this embodiment, the disposable hygiene product servo drive production equipment includes the negative pressure transmission components of embodiments 1, 2, 3, and 4.

[0073] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A negative pressure transmission component for a servo-driven production equipment for disposable hygiene products, characterized in that, It includes a first groove (1) and a second groove (2) that are sequentially distributed along the first direction corresponding to the mold wheel (3). A first position (11) and a second position (12) are sequentially provided between the mold wheel (3) and the second groove (2) along the first direction, and a part of the first position (11) is located inside the mold wheel (3). The first groove (1) is connected to the second groove (2) via a telescopic member (4). The telescopic member (4) includes a drive part (41) on the second groove (2) and a telescopic part (42) on the first groove (1). The drive part (41) switches states and the first groove (1) switches between a first position (11) and a second position (12) by the telescopic part (42) moving along a first direction. The length of the telescopic part (42) is adjusted so that the first groove (1) moves along a first direction at the first position (11). When the first trough (1) is in the first position (11), a telescopic zone (5) is formed between the first trough (1) and the second trough (2). Rollers (6) are provided on both the first trough (1) and the second trough (2). The rollers (6) are connected to the conveyor belt (7). The conveyor belt (7) covers the first trough (1), the second trough (2) and the telescopic zone (5). The negative pressure intensity in the first trough (1) and the second trough (2) is the same. The second trough (2) is connected to the telescopic zone (5), so that the negative pressure intensity at the corresponding parts of the conveyor belt (7) is the same. The conveyor belt (7) adsorbs the material transported on the conveyor belt (7) through negative pressure. An air guide cylinder (51) is provided on the first trough (1) along the first direction at the telescopic area (5). The air guide cylinder (51) is in contact with the conveyor belt (7), and an air guide hole (52) is opened on the side of the air guide cylinder (51) close to the conveyor belt (7). The air guide hole (52) is connected to the internal space of the second trough (2) through the internal space of the air guide cylinder (51). The end of the air guide cylinder (51) away from the first trough (1) extends through and into the second trough (2). The internal space of the air guide cylinder (51) is connected to the internal space of the second trough (2), and the negative pressure intensity of the air guide cylinder (51) is the same as the negative pressure intensity of the internal space of the second trough (2). The length of the air guide cylinder (51) in the second trough (2) is greater than the distance that the first trough (1) moves at the first position (11).

2. The negative pressure transmission component of the disposable hygiene product servo drive production equipment according to claim 1, characterized in that, The drive unit (41) includes a guide block (411), a support arm (412), and a handle arm (413). The guide block (411) is disposed on the second groove (2). The telescopic part (42) is inserted into the guide block (411) along the first direction. One end of the support arm (412) is hinged to the guide block (411), and the other end is hinged to the handle arm (413). The handle arm (413) is hinged to the telescopic part (42). The support arm (412) and the handle arm (413) rotate to make the telescopic part (42) move along the first direction within the guide block (411).

3. The negative pressure transmission component of the disposable hygiene product servo drive production equipment according to claim 2, characterized in that, The telescopic part (42) includes a connecting rod (421), a screw (423), a nut (424), and a connecting block (425). The connecting block (425) is disposed on the first groove (1). The screw (423) is disposed on the connecting block (425) along the first direction. The connecting rod (421) is inserted into the guide block (411). The end of the connecting rod (421) near the screw (423) is rotatably connected to the nut (424), and the end of the connecting rod (421) is provided with a groove (422) along the first direction. The end of the screw (423) away from the connecting block (425) passes through the nut (424) and extends into the groove (422). The nut (424) is threadedly connected to the screw (423). The nut (424) rotates through the screw (423) to move the first groove (1) at the first position (11) along the first direction.

4. The negative pressure transmission component of the disposable hygiene product servo drive production equipment according to claim 1, characterized in that, The first groove (1) is provided with a guide post (8) along the first direction, and the second groove (2) is provided with a sliding sleeve (9), and the guide post (8) is inserted into the sliding sleeve (9).

5. The negative pressure transmission component of the disposable hygiene product servo drive production equipment according to claim 1, characterized in that, The second tank (2) has an opening a (21). A sealing plate (212) and a second air pipe (211) are provided on the second tank (2) at the location corresponding to the opening a (21). The second air pipe (211) draws air through the opening a (21) to generate negative pressure in the second tank (2). The sealing plate (212) moves to open or close the opening a (21).

6. The negative pressure transmission component of the disposable hygiene product servo drive production equipment according to claim 5, characterized in that, The second air pipe (211) is provided with a U-shaped first mounting plate (213) at the air extraction end. The sealing plate (212) is inserted into the first mounting plate (213). The second groove (2) is provided with a U-shaped second mounting plate (214) at the corresponding opening a (21). The first mounting plate (213) and the second mounting plate (214) are connected. The internal space of the first mounting plate (213) and the second mounting plate (214) forms a connecting space, connecting the second air pipe (211) with the opening a (21). When the sealing plate (212) is inserted into the first mounting plate (213), the sealing plate (212) seals the connecting space.

7. The negative pressure transmission component of the disposable hygiene product servo drive production equipment according to claim 5, characterized in that, The second groove (2) has an opening b (22), and an air inlet plate (221) is provided at the position corresponding to the opening b (22) on the second groove (2). An adjustment plate (223) is rotatably connected to the air inlet plate (221). An air inlet hole a (222) and an air inlet hole b (224) are respectively provided on the air inlet plate (221) and the adjustment plate (223). When the air inlet hole a (222) and the air inlet hole b (224) are aligned, an air inlet channel is formed. External air enters the second groove (2) through the air inlet channel. When the distance between the air inlet hole a (222) and the air inlet hole b (224) increases, the cross-section of the air inlet channel decreases.

8. A servo-driven production equipment for disposable hygiene products, characterized in that, The disposable hygiene product servo drive production equipment includes a negative pressure transmission component as described in any one of claims 1-7.

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