A drum-type ultrasonic device

Abstract

This invention provides a drum-type ultrasonic device, including a cleaning unit. The cleaning unit includes a cleaning section, an adjustment section, and an oil supply section. The cleaning section includes a cleaning rotating component, which is configured to rotate along with the ultrasonic welding head. The rotation direction of the cleaning rotating component is the same as or opposite to the rotation direction of the rotating drum, and the rotation speed of the cleaning rotating component is different from that of the rotating drum. When the ultrasonic welding head rotates with the rotating drum to the position of the cleaning unit, and the cleaning component rotates to correspond with the ultrasonic welding head, the cleaning component abuts against the ultrasonic welding head. The oil supply section is used to supply lubricating oil to the cleaning component. The adjustment section is used to adjust the cleaning section so that the cleaning component abuts against or moves away from the ultrasonic welding head. This invention utilizes the speed difference to clean the ultrasonic welding head through an oil supply method, improving the welding strength and welding pattern effect of continuous sheets.

Description

Technical Field

[0001] This invention relates to the field of disposable hygiene product manufacturing equipment technology, and more particularly to baby pull-up diapers, adult pull-up diapers, and women's sanitary trousers, especially a drum-type ultrasonic device. Background Technology

[0002] It is known that disposable diapers typically consist of a front abdomen section that sits on the wearer's abdomen, a back section that sits on the wearer's buttocks, and a crotch section that extends from the front abdomen to the back. In disposable diapers, the two side edges of the front abdomen and the two side edges of the back are fused together to close the diaper, forming a pant-like shape with one waist opening and two leg openings.

[0003] The welding of the two sides of the front abdomen and the two sides of the back of the disposable diaper is usually done using an ultrasonic device. One existing drum-type ultrasonic device has an ultrasonic welding head and an anvil. With the two sides of the front abdomen and the two sides of the back of the disposable diaper clamped between the anvil and the ultrasonic welding head, the anvil moves back and forth on the ultrasonic welding head, and the two sides of the front abdomen and the two sides of the back of the disposable diaper are welded by applying ultrasonic vibration to the ultrasonic welding head.

[0004] However, because the ultrasonic welding head does not rotate relative to the anvil in this ultrasonic method, foreign objects such as fiber residue, dust, etc., remain on the ultrasonic welding head during the welding process. This greatly reduces the energy released by the ultrasonic welding head and affects the welding strength and welding pattern effect of the two sides of the front abdomen and the two sides of the back of the disposable diaper. Summary of the Invention

[0005] This invention provides a drum-type ultrasonic device to solve the technical problem that the ultrasonic welding head of the drum-type ultrasonic device is prone to leaving fiber residues, dust and other foreign objects in the welded material.

[0006] The technical solution provided by this invention is as follows:

[0007] This invention provides a drum-type ultrasonic device for fusing the two sides of the front abdomen and the two sides of the back of a disposable diaper in a continuous sheet together along the longitudinal direction of the continuous sheet perpendicular to the flow direction to form a fusion section. The continuous sheet is a semi-finished product in the disposable diaper production process and has been configured with an absorbent body and has a leg opening. The absorbent body is arranged adjacent to the leg opening.

[0008] The drum-type ultrasonic device includes a rotating drum and a plurality of welded components connected to the rotating drum and distributed along the circumference of the rotating drum. The plurality of welded components are configured to rotate together with the rotating drum; the plurality of welded components distributed along the circumference of the rotating drum form an ultrasonic transmission path.

[0009] The welding assembly includes an ultrasonic welding head and an anvil. The continuous sheet is disposed between the ultrasonic welding head and the anvil along the ultrasonic transmission path. The anvil is configured to reciprocate between a non-welding range and a welding range along the longitudinal direction of the continuous sheet. In the welding range, the anvil runs on the surface of the ultrasonic welding head. In the non-welding range, the anvil is away from the ultrasonic welding head.

[0010] The drum-type ultrasonic device further includes a cleaning unit, which includes a cleaning section, an adjustment section, and an oil supply section. The cleaning section includes a cleaning rotating component, and the cleaning rotating component is intermittently provided with cleaning components corresponding to one of the ultrasonic welding heads.

[0011] The oil supply unit is connected to the cleaning unit and is used to supply lubricating oil to the cleaning component; the adjustment unit is connected to the cleaning unit and is used to adjust the cleaning unit so that the cleaning component abuts against or moves away from the ultrasonic welding head.

[0012] The cleaning rotating component is configured to drive the cleaning component to rotate together, the rotation direction of the cleaning rotating component is the same as or opposite to the rotation direction of the rotating drum, and the rotation speed of the cleaning rotating component is different from the rotation speed of the rotating drum.

[0013] As the cleaning component rotates with the cleaning rotating component, when the ultrasonic welding head rotates with the rotating drum to the position of the cleaning unit and the cleaning component rotates to correspond with the ultrasonic welding head, the cleaning component abuts against the ultrasonic welding head to perform oil cleaning on the ultrasonic welding head; when the cleaning component rotates to the position of the oil supply part, the oil supply part provides lubricating oil to the cleaning component.

[0014] In a preferred embodiment, the cleaning unit further includes a servo motor and a rotating shaft, the cleaning rotating component is fixed to the rotating shaft, and the servo motor drives the rotating shaft to rotate, thereby causing the cleaning rotating component to rotate.

[0015] In a preferred embodiment, the cleaning unit further includes a fixing frame connected to the rotating shaft, and the rotating shaft rotates relative to the fixing frame;

[0016] An oil groove is provided inside the fixed frame, and an oil supply component is connected to the oil groove; when the cleaning component rotates with the cleaning rotating component to the position of the oil supply component, the oil supply component transmits lubricating oil to the cleaning component, providing lubricating oil to the cleaning component.

[0017] In a preferred embodiment, the cleaning component is made of sponge material or a brush roller structure.

[0018] In a preferred embodiment, the oil supply unit further includes an oil supply connector, an oil supply pipeline, and an automatic oil supply device.

[0019] The automatic oil supply device is connected to the oil supply pipeline, the oil supply pipeline is connected to the oil supply connector, and the oil supply connector is connected to the oil tank.

[0020] In a preferred embodiment, the adjustment unit includes a cylinder and a mounting bracket.

[0021] The cylinder body is fixed to the mounting bracket, the output shaft of the cylinder is connected to the cleaning part, and the cylinder drives the cleaning part to reciprocate, so that the cleaning part abuts against or moves away from the ultrasonic welding head.

[0022] In a preferred embodiment, the cleaning unit further includes a sensor; the sensor senses a position in the circumferential direction of the rotation axis for detecting the origin return of the cleaning component.

[0023] In a preferred embodiment, the drum-type ultrasonic device further includes an inlet roller and an outlet roller, the inlet roller being disposed at the inlet of the ultrasonic transmission path, the outlet roller being disposed at the outlet of the ultrasonic transmission path, and the cleaning unit being arranged between the inlet roller and the outlet roller.

[0024] In a preferred embodiment, the drum-type ultrasonic device further includes a plurality of first conveyor rollers and a plurality of second conveyor rollers, as well as a first conveyor belt and a second conveyor belt; the first conveyor rollers are arranged along the outer periphery of the ultrasonic transmission path, and the second conveyor rollers are arranged above the inlet roller and the outlet roller.

[0025] The first conveyor belt sequentially wraps around the outer circumference of a plurality of second conveyor rollers, the inlet roller, the ultrasonic transmission path, and the outlet roller; the second conveyor belt sequentially wraps around the outer circumference of the inlet roller, the ultrasonic transmission path, the outlet roller, and the plurality of first conveyor rollers.

[0026] Furthermore, along the flow path of the inlet roller, the ultrasonic transmission path, and the outlet roller, the first conveyor belt overlaps with the second conveyor belt to hold the position of the absorber of the continuous sheet conveyed along the flow path of the inlet roller, the ultrasonic transmission path, and the outlet roller.

[0027] In a preferred embodiment, the anvil is a circular structure with a uniformly distributed floral pattern on its circumferential surface, which can correspondingly form the welded portion of the welding pattern on the continuous sheet.

[0028] In a preferred embodiment, the welding assembly includes sheet support members on both sides of the ultrasonic welding head to support the continuous sheet being transmitted along the ultrasonic transmission path.

[0029] The above-described technical solution of the present invention has at least the following beneficial effects compared with the prior art:

[0030] This invention provides a drum-type ultrasonic device that uses the speed difference between the cleaning unit's rotating component and the rotating drum to clean the ultrasonic welding head. Compared to cleaning at the same speed, this method cleans more thoroughly.

[0031] In addition, a cleaning unit is installed on the rotating cleaning component, and an oil supply unit is provided for automatic oil supply to the cleaning unit. When the ultrasonic welding head rotates with the rotating drum to the position of the cleaning unit, and the cleaning component rotates to correspond with the ultrasonic welding head, the cleaning component cleans the ultrasonic welding head by supplying oil. When the cleaning component rotates to the position of the oil supply component, the oil supply component delivers lubricating oil to the cleaning component, thereby ensuring the circulation of this oil supply cleaning method. This prevents fiber residues, dust, and other foreign objects from adhering to the ultrasonic welding head due to the application of lubricating oil, thereby improving the welding strength and welding pattern effect on the two sides of the front abdomen and the two sides of the back of the continuous sheet. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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.

[0033] Figure 1 This is a flowchart illustrating the manufacturing process of disposable diapers.

[0034] Figure 2 This is a schematic diagram of the structure of a drum-type ultrasonic device according to the present invention.

[0035] Figure 3 This is a schematic diagram of the welding assembly of the present invention along the longitudinal direction of the continuous sheet.

[0036] Figure 4 This is a schematic diagram of the first transmission belt and the second transmission belt clamping and conveying a continuous sheet along the ultrasonic transmission path of the present invention.

[0037] Figure 5 This is a schematic diagram illustrating the process of fusing the two sides of the front abdomen and the two sides of the back of the continuous sheet of the present invention together along the longitudinal direction of the continuous sheet.

[0038] Figure 6This is a schematic diagram of the cleaning unit of the present invention, mainly showing the structure of the adjustment part and the cleaning part.

[0039] Figure 7 yes Figure 6 Side view.

[0040] Figure 8 This is a schematic diagram showing the structure and connection of the cleaning unit and the oil supply unit of the cleaning unit of the present invention.

[0041] Figure 9 This is a schematic diagram of the cleaning component rotating with the cleaning rotating component according to the present invention.

[0042] Figure 10 This is a side view of the cleaning component of the present invention rotating with the cleaning rotating component to the position of the oiling component. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0044] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an,” “a,” or “the,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising,” “including,” or “including,” and similar terms mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. The terms “connected,” “linked,” or “connected,” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0045] It should be noted that the terms "up", "down", "left", "right", "front", and "back" used in this invention are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0046] like Figure 1 The diagram shows the manufacturing process of disposable diapers. The disposable diaper S includes an outer body S2 and an absorbent body S1 disposed inside the outer body S2. The absorbent body S1 is the main carrier for absorbing excrement.

[0047] The outer body S2 is a continuous sheet W composed of inner and outer non-woven fabrics and an elastic component disposed between the inner and outer non-woven fabrics. The elastic component can be spandex filaments (elastic bands), elastic films, elastic composite films, or other elastic materials. The continuous sheet W is a semi-finished product in the production process of disposable diapers S, and it already has an absorbent core S1 and leg openings K, which are adjacent to each other. Since the continuous sheet W is still in the process of processing, it is in a continuous state here.

[0048] The outer garment S2 can be divided into the front abdomen S21 and the back S22 according to the wearing location. When the disposable diaper S is worn, the front abdomen S21 corresponds to the abdominal area of ​​the human body, and the back S22 corresponds to the buttock area of ​​the human body. In the manufacturing process of the disposable diaper S, along the flow direction (e.g. Figure 1 (As shown) includes the conveying process P1, the leg opening process P2, the absorbent joining process P3, the folding process P4, the welding process P5, and the cutting process P6.

[0049] The conveying process P1 involves conveying the continuous sheet W formed upstream along the flow direction. The leg opening process P2 forms a leg opening K at the center of the continuous sheet W in the longitudinal direction a. The absorbent body joining process P3 joins the absorbent body S1 between the two leg openings K in the continuous sheet W. The folding process P4 folds the continuous sheet W with the absorbent body S1 joined in the longitudinal direction a, overlapping the front abdomen S21 and the back S22. The welding process P5 welds the two side edges of the front abdomen S22 and the two side edges of the back S22 together along the longitudinal direction a, forming a welded section A. The cutting process P6 cuts the continuous sheet W along a cutting line extending in the longitudinal direction a at the center of the welded section A formed in the welding process P5, forming a single disposable diaper S. Here, the longitudinal direction a is perpendicular to the flow direction.

[0050] The present invention provides a drum-type ultrasonic device located in the welding process P5, used to weld the two sides of the front abdomen S21 and the two sides of the back S22 of the corresponding disposable diaper S in the continuous sheet W together along the longitudinal direction a of the continuous sheet W to form a welded part A, so that it is in a closed state, so that after the cutting process P6, a single piece of disposable diaper S is formed with a trouser shape with one waist opening and two leg openings.

[0051] like Figure 2The diagram shows a schematic representation of a drum-type ultrasonic device according to the present invention. According to an embodiment of the present invention, the drum-type ultrasonic device has a drum structure, including a rotating drum 1 and multiple welded components 2 connected to the rotating drum 1 and distributed along the circumference of the rotating drum 1. The multiple welded components 2 are configured to rotate together with the rotating drum 1. The multiple welded components 2 distributed along the circumference of the rotating drum 1 form an ultrasonic transmission path L.

[0052] Specifically, the rotating drum 1 is fixed to a drive shaft (not shown in the figure). The drive shaft is connected to a drive component, providing driving force for the rotation of the rotating drum 1, causing the rotating drum 1 to rotate. The direction of rotation of the rotating drum 1 is as follows: Figure 2 As indicated by arrow b. In this embodiment, the exemplary rotating drum 1 rotates clockwise. In some embodiments, the rotating drum 1 may also rotate counterclockwise, depending on the actual process direction.

[0053] The welding assembly 2 includes an ultrasonic welding head 21 and an anvil 22. The continuous sheet W is disposed between the ultrasonic welding head 21 and the anvil 22 along the ultrasonic transmission path L. The ultrasonic welding head 21 and the anvil 22 weld the continuous sheet W by clamping it.

[0054] The ultrasonic welding head 21 is positioned along the longitudinal direction a of the continuous sheet W in the length direction. The ultrasonic welding head 21 corresponds to the position of the anvil 22, and the anvil 22 is configured to reciprocate between a non-welding range E2 (E3) and a welding range E1 along the longitudinal direction a of the continuous sheet W. Within the welding range E1, the anvil 22 moves on the surface of the ultrasonic welding head 21; within the non-welding range E2 (E3), the anvil 22 moves away from the ultrasonic welding head 21. Figure 3 The diagram shown is a schematic representation of the welding assembly 2 of the present invention along the longitudinal direction a of the continuous sheet W, and in conjunction with... Figure 4 Schematic diagram of the welding range E2 (E3) and welding range E1 between China and Africa.

[0055] According to an embodiment of the present invention, the drum-type ultrasonic device further includes an inlet roller 6, an outlet roller 7, a plurality of first conveyor rollers 8, a plurality of second conveyor rollers 9, and a first conveyor belt 10 and a second conveyor belt 11. The inlet roller 6 is disposed at the inlet of the ultrasonic transmission path L, and the outlet roller 7 is disposed at the outlet of the ultrasonic transmission path L. The first conveyor rollers 8 are arranged along the outer periphery of the ultrasonic transmission path L, and the second conveyor rollers 9 are arranged above the inlet roller 6 and the outlet roller 7.

[0056] The first conveyor belt 10 is sequentially wrapped around the outer circumference of multiple second conveyor rollers 9, inlet roller 6, ultrasonic transmission path L and outlet roller 7, and the second conveyor belt 11 is sequentially wrapped around the outer circumference of inlet roller 6, ultrasonic transmission path L, outlet roller 7 and multiple first conveyor rollers 8.

[0057] The inlet roller 6 is used to introduce the continuous sheet W with the absorber S1 attached into the drum ultrasonic device for welding, and the outlet roller 7 is used to outlet the continuous sheet W formed by welding the two sides of the front abdomen S22 and the two sides of the back S22 to form the welded part A from the drum ultrasonic device.

[0058] In welding assembly 2, sheet support members 4 are provided on both sides of ultrasonic welding head 21. Along the flow path of inlet roller 6, ultrasonic transmission path L, and outlet roller 7, the first conveyor belt 10 and the second conveyor belt 11 overlap to clamp the absorber S1 of the continuous sheet W conveyed along the flow path of inlet roller 6, ultrasonic transmission path L, and outlet roller 7, continuously pulling the continuous sheet W, as shown. Figure 4 The diagram shows a continuous sheet W being clamped and conveyed along the ultrasonic transmission path L by the first transmission belt 10 and the second transmission belt 11 of the present invention.

[0059] Because the absorber S1 has a certain thickness and rigidity, the first conveyor belt 10 and the second conveyor belt 11 overlap along the flow path of the inlet roller 6, the ultrasonic transmission path L and the outlet roller 7, clamping part of the absorber S1 of the continuous sheet W conveyed along the flow path of the inlet roller 6, the ultrasonic transmission path L and the outlet roller 7, so that the continuous sheet W can be fixed better during the welding process, thereby ensuring the accuracy and stability of the welding position of the continuous sheet W.

[0060] The sheet support 4 is used to support the continuous sheet W transmitted along the ultrasonic transmission path L. That is, the sheet support 4 plays a supporting role before and after the continuous sheet W is fused.

[0061] like Figure 3 As shown, the anvil 22 is connected to the moving mechanism 221. Under the action of the moving mechanism 221, while the continuous sheet W rotates with the rotating drum 1, the anvil 22 reciprocates on the surface of the ultrasonic welding head 21 along the longitudinal direction a of the continuous sheet W, and welds the continuous sheet W by applying ultrasonic vibration to the ultrasonic welding head 21.

[0062] In other words, while the anvil 22 rotates with the rotating drum 1, it reciprocates along the longitudinal direction a of the continuous sheet W relative to the surface of the ultrasonic welding head 21, so that the outer peripheral surface of the anvil 22 always abuts against the continuous sheet W during the reciprocating motion of the anvil 22 on the surface of the ultrasonic welding head 21.

[0063] like Figure 5 The diagram shows the process of welding the two sides of the front abdomen and the two sides of the back of the continuous sheet W together along the longitudinal direction a of the continuous sheet W. The anvil 22 is a circular structure with flower patterns 222 evenly distributed on its circumference, which can reliably form the welding pattern A on the continuous sheet W.

[0064] Combination Figure 4 and Figure 5 From the perspective of the continuous sheet W, the anvil 22 moves back and forth between the first non-welding range E2, the welding range E1, and the second non-welding range E3 (e.g., Figure 5 As shown by arrow c), the welding of the continuous sheet W reliably forms a welded portion A on the continuous sheet W with a welding pattern corresponding to the flower pattern 222.

[0065] In the present invention, the anvil 22 and ultrasonic welding head 21 of the drum-type ultrasonic device rotate together with the rotating drum 1. The ultrasonic welding head 21 does not rotate relative to the anvil 22. Therefore, it is very easy for foreign objects such as fiber residue, dust and so on to be left on the ultrasonic welding head 21. These foreign objects greatly reduce the energy released by the ultrasonic welding head 21. Moreover, these foreign objects are difficult to clean and require manual removal after stopping the machine, which affects production efficiency.

[0066] like Figure 6 The diagram shown is a structural schematic of the cleaning unit of the present invention, mainly illustrating the structure of the adjustment section and the cleaning section. Figure 7 for Figure 6 Side view, Figure 8 The diagram shown illustrates the structure and connection of the cleaning unit and the oil supply unit of the cleaning unit of the present invention. Figure 9 The diagram shown is a schematic representation of the cleaning component rotating with the cleaning rotating component according to the present invention. Figure 10 The image shown is a side view of the cleaning component of the present invention rotating with the cleaning rotating component to the position of the oiling component. According to an embodiment of the present invention, the drum ultrasonic device further includes a cleaning unit 5, which is arranged between the inlet roller 6 and the outlet roller 7.

[0067] The cleaning unit 5 includes a cleaning section 51, an adjustment section 52, and an oil supply section 53. The cleaning section 51 is used to clean foreign objects from the ultrasonic welding head 21.

[0068] The cleaning unit 51 includes a cleaning rotating component 511, a servo motor 513, a rotating shaft 512, and a fixing frame 514. The cleaning rotating component 511 is intermittently provided with cleaning components 511' corresponding to an ultrasonic welding head 21. The cleaning rotating component 511 is fixed to the rotating shaft 512. The servo motor 513 drives the rotating shaft 512 to rotate, thereby causing the cleaning rotating component 511 to rotate.

[0069] The fixed frame 514 is connected to the rotating shaft 512, and the rotating shaft 512 rotates relative to the fixed frame 514. For example, the rotating shaft 512 and the fixed frame 514 are connected by bearings, and the cleaning rotating member 511 is mounted on the rotating shaft 512 and rotates together with the rotating shaft 512. An oil groove 515 is provided in the fixed frame 514, and an oil supply component 516 communicates with the oil groove 515. When the cleaning member 511' rotates with the cleaning rotating member 511 to the position of the oil supply component 516, the oil supply component 516 transmits lubricating oil to the cleaning member 511', supplying oil to the cleaning member 511'.

[0070] Furthermore, the cleaning unit 51 also includes a sensor 517. The sensor 517 senses a position in the circumferential direction of the rotating shaft 512 to detect the origin return of the cleaning component 511' (origin return means that when the equipment is restarted, each component needs to be returned to its initial position). Since the cleaning component 511' is intermittently positioned (not a full circle) on the rotating shaft 512, origin return needs to be set, which is the reference for equipment startup.

[0071] According to an embodiment of the present invention, the cleaning rotating member 511 is configured to drive the cleaning member 511' to rotate together, and the rotation direction of the cleaning rotating member 511 is the same as or opposite to the rotation direction of the rotating drum 1, and the rotation speed of the cleaning rotating member 511 is different from the rotation speed of the rotating drum 1.

[0072] During the rotation of the cleaning component 511' along with the cleaning rotating component 511, when the ultrasonic welding head 21 rotates with the rotating drum 1 to the position of the cleaning unit 5, and the cleaning component 511' rotates to correspond with the ultrasonic welding head 21, the cleaning component 511' abuts against the ultrasonic welding head 21 to achieve oil supply cleaning of the ultrasonic welding head 21. When the cleaning component 511' rotates to the position of the oil supply part 53, the oil supply part 53 supplies lubricating oil to the cleaning component 511'.

[0073] Specifically, when the ultrasonic welding head 21 rotates with the rotating drum 1 to the position of the cleaning unit 5, and the cleaning component 511' rotates with the cleaning rotating component 511 to position A1 of the ultrasonic welding head 21, the cleaning component 511' abuts against the ultrasonic welding head 21 (e.g., Figure 9 (As shown).

[0074] In some embodiments, by setting the rotation speed of the rotating drum 1 and the cleaning rotating member 511, the ultrasonic welding head 21 rotates with the rotating drum 1 to the position of the cleaning unit 5, and when the cleaning member 511' rotates with the cleaning rotating member 511 to the position A1 of the ultrasonic welding head 21, the cleaning member 511' abuts against the ultrasonic welding head 21.

[0075] For example, in this embodiment, the rotating drum 1 rotates in a clockwise direction ( Figure 2If the direction indicated by the middle arrow b is specified, then the cleaning rotating component 511 is configured to drive the cleaning component 511' to rotate together, and the rotation direction of the cleaning rotating component 511 is the same as the rotation direction of the rotating drum 1, that is, the cleaning rotating component 511 rotates in a clockwise direction.

[0076] At this time, when the ultrasonic welding head 21 rotates with the rotating drum 1 to the position of the cleaning unit 5, and the cleaning component 511' rotates with the cleaning rotating component 511 to the position A1 of the ultrasonic welding head 21, the ultrasonic welding head 21 and the cleaning component 511' move in opposite directions (the cleaning component 511' moves to the left, and the ultrasonic welding head 21 moves to the right). The cleaning component 511' comes into contact with the ultrasonic welding head 21, thereby enabling the cleaning component 511' to clean the foreign objects on the ultrasonic welding head 21.

[0077] In another embodiment, the rotating drum 1 rotates clockwise. Figure 2 If the direction indicated by the middle arrow b is specified, then the cleaning rotating member 511 is configured to drive the cleaning member 511' to rotate together, and the rotation direction of the cleaning rotating member 511 is opposite to the rotation direction of the rotating drum 1, that is, the cleaning rotating member 511 rotates counterclockwise, but the rotation speed of the cleaning rotating member 511 is different from the rotation speed of the rotating drum 1.

[0078] At this time, when the ultrasonic welding head 21 rotates with the rotating drum 1 to the position of the cleaning unit 5, and the cleaning component 511' rotates with the cleaning rotating component 511 to the position A1 of the ultrasonic welding head 21, the cleaning component 511' comes into contact with the ultrasonic welding head 21. Although the ultrasonic welding head 21 and the cleaning component 511' move in the same direction (the cleaning component 511' moves to the right, and the ultrasonic welding head 21 also moves to the right), there is a speed difference between the ultrasonic welding head 21 and the cleaning component 511' due to their different speeds (circumferential speeds). This allows the cleaning component 511' to clean the foreign objects on the ultrasonic welding head 21.

[0079] The speed at which the cleaning component 511' rotates with the cleaning rotating component 511 is controlled by the speed at which the servo motor 513 drives the rotating shaft 512 to rotate, thereby controlling the speed at which the cleaning rotating component 511 drives the cleaning component 511' to rotate, so that there is a speed difference between the cleaning component 511' and the ultrasonic welding head 21, thereby using the speed difference to achieve better cleaning by the ultrasonic welding head 21.

[0080] According to an embodiment of the present invention, the oil supply unit 53 is connected to the cleaning unit 51 and is used to supply lubricating oil to the cleaning component 511'. The oil supply unit 53 also includes an oil supply connector 531, an oil supply line 532, and an automatic oil supply device 533. The automatic oil supply device 533 is connected to the oil supply line 532, the oil supply line 532 is connected to the oil supply connector 531, and the oil supply connector 531 is connected to the oil tank 515. The automatic oil supply device 533 transmits lubricating oil into the oil tank 515 through the oil supply line 532 and the oil supply connector 531, and the lubricating oil is transmitted to the oil supply component 516 via the oil tank 515.

[0081] According to an embodiment of the present invention, when the cleaning component 511' rotates with the cleaning rotating component 511 to position A2 of the oiling component 516, the oiling component 516 transmits lubricating oil to the cleaning component 511', supplying oil (replenishing lubricating oil) to the cleaning component 511' (e.g., Figure 9 (As shown).

[0082] In this invention, the ultrasonic welding head 21 rotates with the rotating drum 1, and the cleaning component 511' rotates with the cleaning rotating component 511. When the cleaning component 511' rotates with the cleaning rotating component 511 to position A2 of the oil supply component 516, the oil supply component 516 supplies lubricating oil to the cleaning component 511'; when the cleaning component 511' rotates with the cleaning rotating component 511 to position A1 of the ultrasonic welding head 21, the ultrasonic welding head 21 abuts against the cleaning component 511', and the cleaning component 511' performs real-time oil supply and cleaning on the ultrasonic welding head 21.

[0083] The switching method of the cleaning component 511' for cleaning the ultrasonic welding head 21 and replenishing lubricating oil in the cleaning component 511' of the present invention enables the automatic oil supply device 533 to automatically supply lubricating oil to the cleaning component 511' during the operation of the present invention, so as to achieve the purpose of oil supply and cleaning. The lubricating oil effectively prevents foreign objects from adhering to the ultrasonic welding head 21, which would affect the welding strength and welding pattern effect, thereby improving the automation level of the equipment and saving downtime for cleaning, and greatly improving production efficiency.

[0084] The cleaning unit 5 of this invention is arranged between the inlet roller 6 and the outlet roller 7 (upstream of the continuous sheet W during welding). Before welding the continuous sheet W, it cleans the ultrasonic welding head 21 with oil, preventing fiber residue, dust, and other foreign matter from adhering to the ultrasonic welding head 21, thereby improving the welding strength and welding pattern effect of the ultrasonic welding head 21. When the inlet roller 6 guides the continuous sheet W into the welding assembly 2 where welding is to be performed, the anvil 22 moves along the longitudinal direction a of the continuous sheet W to the first non-welding range E2 on the surface of the ultrasonic welding head 21 to avoid interference between the anvil 22 and the cleaning unit 5. The outlet roller 7 at the outlet station is similarly configured.

[0085] In one embodiment, the cleaning component 511' can be made of sponge material or a brush roller structure. Preferably, in order to better perform oil supply cleaning on the ultrasonic welding head 21, the cleaning component 511' is preferably made of sponge material, which can play a good role in absorbing and storing oil.

[0086] In one embodiment, the oil supply component 516 may be configured as a felt or nozzle structure, etc.

[0087] According to an embodiment of the present invention, the adjustment part 52 is connected to the cleaning part 51 and is used to adjust the cleaning part 51 so that the cleaning part 511' abuts against or moves away from the ultrasonic welding head 21.

[0088] The adjustment unit 52 includes a cylinder 521 and a mounting bracket 522. The cylinder 521 body is fixed to the mounting bracket 522, and the output shaft of the cylinder 521 is connected to the cleaning unit 51. The cylinder 521 drives the cleaning unit 51 to reciprocate, causing the cleaning component 511' to come into contact with or move away from the ultrasonic welding head 21.

[0089] When the ultrasonic welding head 21 needs to be cleaned, the adjusting unit 52 adjusts the cleaning unit 51 via the cylinder 521, so that the cleaning part 511' comes into contact with the ultrasonic welding head 21. When the cleaning unit 51 needs to be maintained, the adjusting unit 52 adjusts the cleaning unit 51 via the cylinder 521, so that the cleaning part 511' moves away from the ultrasonic welding head 21.

[0090] The present invention provides a drum-type ultrasonic device that uses the speed difference between the cleaning rotating part 511 of the cleaning unit 5 and the rotating drum 1 to clean the ultrasonic welding head 21. Compared with cleaning at the same speed, this method cleans more thoroughly.

[0091] In addition, the cleaning rotating part 511 is equipped with a cleaning part 511', and the cleaning unit 5 is equipped with an oil supply part 53 for automatic oil supply. When the ultrasonic welding head 21 rotates with the rotating drum 1 to the position of the cleaning unit 5, and the cleaning part 511' rotates to correspond with the ultrasonic welding head 21, the cleaning part 511' cleans the ultrasonic welding head 21 by supplying oil. When the cleaning part 511' rotates to the position of the oil supply part 516, the oil supply part 516 delivers lubricating oil to the cleaning part 511', thereby ensuring that this oil supply cleaning method can be circulated, so that fiber residue, dust and other foreign objects no longer adhere to the ultrasonic welding head 21 due to the application of lubricating oil, thereby improving the welding strength and welding pattern effect of the two sides of the front abdomen S21 and the two sides of the rear back S22 of the continuous sheet W.

[0092] The following points need to be explained:

[0093] (1) The accompanying drawings of the embodiments of the present invention only involve the structures involved in the embodiments of the present invention. Other structures can refer to the general design.

[0094] (2) For clarity, the thickness of layers or regions is enlarged or reduced in the drawings used to describe embodiments of the present invention; that is, these drawings are not drawn to actual scale. It is understood that when an element such as a layer, film, region, or substrate is referred to as being “above” or “below” another element, the element may be “directly” located “above” or “below” the other element, or there may be intermediate elements.

[0095] (3) Where there is no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other to obtain new embodiments.

[0096] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. The scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A drum-type ultrasonic device for fusing the two side edges of the front abdomen and the two side edges of the back of a corresponding disposable diaper in a continuous sheet together along the longitudinal direction of the continuous sheet perpendicular to the flow direction to form a welded section, wherein... The continuous sheet is a semi-finished product in the production process of disposable diapers, and it has already been configured with an absorbent body and has leg openings, wherein the absorbent body and the leg openings are arranged adjacent to each other; the characteristic is that the drum-type ultrasonic device includes: A rotating drum and a plurality of welded components connected to the rotating drum and distributed along the circumference of the rotating drum, the plurality of welded components being configured to: rotate together with the rotating drum; the plurality of welded components distributed along the circumference of the rotating drum forming an ultrasonic transmission path; The welding assembly includes an ultrasonic welding head and an anvil. The continuous sheet is disposed between the ultrasonic welding head and the anvil along the ultrasonic transmission path. The anvil is configured to reciprocate between a non-welding range and a welding range along the longitudinal direction of the continuous sheet. In the welding range, the anvil moves on the surface of the ultrasonic welding head. In the non-welding range, the anvil moves away from the ultrasonic welding head. The drum-type ultrasonic device further includes a cleaning unit, which includes a cleaning section, an adjustment section, and an oil supply section. The cleaning section includes a cleaning rotating component and a rotating shaft. The cleaning rotating component is fixed to the rotating shaft. Cleaning components corresponding to one of the ultrasonic welding heads are intermittently arranged on the cleaning rotating component. The cleaning unit also includes a sensor that senses a position in the circumferential direction of the rotating shaft for detecting the origin return of the cleaning component; The oil supply unit is connected to the cleaning unit and is used to supply lubricating oil to the cleaning component; the adjustment unit is connected to the cleaning unit and is used to adjust the cleaning unit so that the cleaning component abuts against or moves away from the ultrasonic welding head. The cleaning rotating component is configured to drive the cleaning component to rotate together, wherein the rotation direction of the cleaning rotating component is the same as or opposite to the rotation direction of the rotating drum, and the rotation speed of the cleaning rotating component is different from the rotation speed of the rotating drum. As the cleaning component rotates with the cleaning rotating component, when the ultrasonic welding head rotates with the rotating drum to the position of the cleaning unit and the cleaning component rotates to correspond with the ultrasonic welding head, the cleaning component abuts against the ultrasonic welding head to perform oil cleaning on the ultrasonic welding head; when the cleaning component rotates to the position of the oil supply part, the oil supply part provides lubricating oil to the cleaning component.

2. The drum-type ultrasonic device according to claim 1, characterized in that, The cleaning unit also includes a servo motor, which drives the rotating shaft to rotate, thereby causing the cleaning rotating component to rotate.

3. The drum-type ultrasonic device according to claim 1, characterized in that, The cleaning unit also includes a fixing frame, which is connected to the rotating shaft, and the rotating shaft rotates relative to the fixing frame; An oil groove is provided inside the fixed frame, and an oil supply component is connected to the oil groove; when the cleaning component rotates with the cleaning rotating component to the position of the oil supply component, the oil supply component transmits lubricating oil to the cleaning component, providing lubricating oil to the cleaning component.

4. The drum-type ultrasonic device according to claim 1 or 2, characterized in that, The cleaning components are made of sponge material or have a brush roller structure.

5. The drum-type ultrasonic device according to claim 3, characterized in that, The oil supply unit includes an oil supply connector, oil supply pipeline, and automatic oil supply device. The automatic oil supply device is connected to the oil supply pipeline, the oil supply pipeline is connected to the oil supply connector, and the oil supply connector is connected to the oil tank.

6. The drum-type ultrasonic device according to claim 1, characterized in that, The adjustment unit includes a cylinder and a mounting bracket. The cylinder body is fixed to the mounting bracket, the output shaft of the cylinder is connected to the cleaning part, and the cylinder drives the cleaning part to reciprocate, so that the cleaning part abuts against or moves away from the ultrasonic welding head.

7. The drum-type ultrasonic device according to claim 1, characterized in that, The drum-type ultrasonic device further includes an inlet roller and an outlet roller. The inlet roller is disposed at the inlet of the ultrasonic transmission path, and the outlet roller is disposed at the outlet of the ultrasonic transmission path. The cleaning unit is arranged between the inlet roller and the outlet roller.

8. The drum-type ultrasonic device according to claim 7, characterized in that, The drum-type ultrasonic device further includes multiple first conveyor rollers and multiple second conveyor rollers, as well as a first conveyor belt and a second conveyor belt; the first conveyor rollers are arranged along the outer periphery of the ultrasonic transmission path, and the second conveyor rollers are arranged above the inlet roller and the outlet roller. The first conveyor belt sequentially wraps around the outer circumference of a plurality of second conveyor rollers, the inlet roller, the ultrasonic transmission path, and the outlet roller; the second conveyor belt sequentially wraps around the outer circumference of the inlet roller, the ultrasonic transmission path, the outlet roller, and the plurality of first conveyor rollers. Furthermore, along the flow path of the inlet roller, the ultrasonic transmission path, and the outlet roller, the first conveyor belt overlaps with the second conveyor belt to hold the position of the absorber of the continuous sheet conveyed along the flow path of the inlet roller, the ultrasonic transmission path, and the outlet roller.

9. The drum-type ultrasonic device according to claim 1, characterized in that, The anvil is a circular structure with a pattern evenly distributed on its circumference, which can correspondingly form the welding pattern on the continuous sheet body.

10. The drum-type ultrasonic device according to claim 1, characterized in that, In the welding assembly, sheet support members are provided on both sides of the ultrasonic welding head to support the continuous sheet being transmitted along the ultrasonic transmission path.

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