CN113367895A

CN113367895A - Manufacturing device of composite sheet

Info

Publication number: CN113367895A
Application number: CN202110684333.0A
Authority: CN
Inventors: 李大柱; 何长青
Original assignee: Huangshan Futian Precision Manufacturing Co Ltd
Current assignee: Huangshan Futian Precision Manufacturing Co Ltd
Priority date: 2021-06-21
Filing date: 2021-06-21
Publication date: 2021-09-10

Abstract

The invention relates to the field of manufacturing disposable sanitary products, and discloses a manufacturing device of a composite sheet, which comprises a welding part and a control part, wherein the welding part is arranged in a continuous production line for conveying the composite sheet, so that the sheets of the composite sheet at a specified position are combined with each other. The welding part is provided with an ultrasonic unit which can rotate around a first axis, and a welding bottom roller which is matched with the ultrasonic unit and can rotate synchronously with the composite sheet around a second axis parallel to the first axis, and the ultrasonic unit is provided with an ultrasonic welding head which is in contact with the composite sheet and can reduce sliding friction with the composite sheet. The rolling ultrasonic welding head can not scrape the composite sheet which is in contact with the ultrasonic welding head, so that the sliding friction between the rolling ultrasonic welding head and the composite sheet is reduced, the folds of the composite sheet and the cotton wool accumulation at the ultrasonic welding head are avoided, meanwhile, the rolling ultrasonic welding head can not continuously extrude the composite sheet, and the glue leakage of the sheet is avoided.

Description

Manufacturing device of composite sheet

Technical Field

The invention relates to the field of manufacturing of disposable sanitary products, in particular to a manufacturing device of a composite sheet.

Background

At present, in the field of production of disposable sanitary products, the composite sheet mostly adopts plane ultrasonic waves to weld materials.

For example, chinese patent application No. 2020202158434 discloses a manufacturing apparatus for disposable wearing articles, which comprises an ultrasonic welding machine fixedly arranged on the conveying path of the disposable wearing article, and comprises an ultrasonic welding head acting on the surface of the disposable wearing article, a welding roller cooperating with the ultrasonic welding head to realize the welding of the disposable wearing article and capable of rotating around the self-axis, wherein the disposable wearing article passes through the middle between the ultrasonic welding head and the welding roller, and the ultrasonic welding head and the welding roller act on the disposable wearing article with certain pressure to realize the welding of the disposable wearing article. The device welds the composite sheet material through the cooperation of the ultrasonic welding head and the anvil on the roller.

However, this device has the following problems: when the composite sheet passes through the ultrasonic welding head along the flow direction, the ultrasonic welding head which is relatively static can scrape the composite sheet which is in contact with the composite sheet, sliding friction is generated between the ultrasonic welding head and the sheet, and based on the friction, the movement of a welding area on the composite sheet is more delayed compared with that of other areas, so that the composite sheet has the defects of deflection and folding, cotton wool accumulation at the welding head, glue seepage and the like.

For another example, chinese patent application No. 201921478700.6 discloses a disposable hygienic article manufacturing system, including a pressing unit, a drawing unit, a sealing unit, a cutting unit, a conveying unit and a direction-adjusting conveying unit, which are sequentially disposed along a sheet conveying path of a disposable hygienic article; the sealing unit comprises a rotary supporting part and a group of welding units which are arranged along the circumferential direction of the rotary supporting part and rotate along with the rotary supporting part. Although the welding unit in the device adopts a roller type structure, and welding is completed by reciprocating the ultrasonic vibrator on the welding anvil and rolling the ultrasonic vibrator along the axis direction of the ultrasonic vibrator during welding, the reciprocating linear motion direction of the ultrasonic vibrator is not consistent with the motion direction of the material, and the device is suitable for welding at discontinuous positions of the material and cannot continuously weld the material along the flow direction.

In view of the above, the present application aims to provide a manufacturing apparatus for composite sheets, so as to solve the above problems in the prior art.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a manufacturing device of a composite sheet, which solves the problems of skew and fold, cotton wool accumulation and glue permeation of the composite sheet caused by sliding friction between a traditional ultrasonic unit and the sheet.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: a composite sheet manufacturing apparatus includes a welding portion provided in a continuous production line for conveying composite sheets so that the sheets of the composite sheets at predetermined positions are joined to each other. The welding part is provided with an ultrasonic unit which can rotate around a first axis, and a welding bottom roller which is matched with the ultrasonic unit and can rotate synchronously with the composite sheet around a second axis parallel to the first axis, and the ultrasonic unit is provided with an ultrasonic welding head which is in contact with the composite sheet and can reduce sliding friction with the composite sheet. When the ultrasonic welding head works, the sheets are welded through the high-frequency vibration of the ultrasonic welding head. Because the sliding friction force between the ultrasonic unit and the composite sheet is reduced, the material is particularly suitable for ultrasonic continuous welding under a high-speed working condition, wrinkles are prevented from appearing on the material, the welding strength is enhanced, and the welding speed is increased.

Further, the shape of the ultrasonic horn is a flat cylinder. Furthermore, the ultrasonic welding head is circular in cross section perpendicular to the second axis, the diameter of the ultrasonic welding head expands and contracts in a high frequency within a certain range during operation, and sheets are welded by extruding the welding bottom roller.

Because the ultrasonic horn has a limited length in the direction along the second axis, at least two ultrasonic units can be selected when the welding area of the welding bottom roller is large.

Further, the upstream side of welding part still is equipped with the guide part, and this guide part makes composite sheet carry with invariable tension with the cladding on the welding backing roll of certain angle, and then guarantees welded roughness.

Further, the ultrasonic unit comprises a driving part which is used for providing power for rotating the ultrasonic unit along the second axis.

The ultrasonic unit further comprises the following structure: the ultrasonic unit is provided with the ultrasonic welding head, an amplitude transformer and an energy converter, wherein the ultrasonic welding head, the amplitude transformer and the energy converter form a triple group, and the triple group can rotate around a second axis under the action of the driving part. In addition, the ultrasonic unit has a cooling assembly for cooling the transducer.

The driving unit may drive the ultrasonic unit by further including a pulley connected to the driving unit via a transmission member, such as a belt or a link. Preferably, when two sets of ultrasonic units are provided, the ultrasonic units can be driven synchronously by a driving part.

Compared with the prior art, the invention provides a processing device of a composite sheet, which has the following beneficial effects:

because the ultrasonic bonding tool can keep rotatory around the first axis parallel in the second axis, utilize the diameter of bonding tool to expand and contract at certain extent high frequency simultaneously, the welding of sheet is realized to the extrusion of welding backing roll, make and the ultrasonic bonding tool can not take place the scraping with between the composite sheet of contact, make sliding friction alleviate between its and the composite sheet, the fold of having avoided the composite sheet and the cotton fibre of ultrasonic bonding tool department are piled up, and simultaneously, rolling ultrasonic bonding tool can not cause the extrusion of continuity to the composite sheet, the sheet oozing glue has been avoided.

In conclusion, the ultrasonic continuous welding device has the characteristics of high welding strength and high welding speed, and can adapt to ultrasonic continuous welding under a high-speed working condition.

Drawings

The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings, in which:

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic structural view of an ultrasound unit of the present invention;

fig. 3 is a schematic view of the arrangement of the welding base roll and the ultrasonic unit of the present invention.

Wherein: 1. an ultrasonic unit; 2. welding a bottom roller; 3. a support frame; 4. a drive section; 5. a composite sheet; 6. a synchronous belt; 7. a guide roller; 8. an ultrasonic horn; 9. an amplitude transformer; 10. a transducer; 11. a fan; 12. a pulley; 13. a mounting frame; 14. a first axis; 15. a second axis; 16. cross section.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

As shown in fig. 1 to 3, a manufacturing apparatus of a composite sheet includes a welding portion provided in a continuous production line that carries the composite sheet so that sheets of the composite sheet at a prescribed position are bonded to each other; wherein the content of the first and second substances,

the welding part is provided with an ultrasonic unit 1 capable of rotating around a first axis 14, and a welding backing roll 2 which is matched with the ultrasonic unit 1 and can rotate synchronously with the composite sheet 5 around a second axis 15 parallel to the first axis 14.

The ultrasonic unit 1 and the welding bottom roller 2 of the welding part are respectively arranged on a support frame which is a square support frame 3 and has enough structural strength.

The specific structure of the ultrasonic unit is described in detail below.

The ultrasonic unit 1 includes an ultrasonic horn 8 that is in contact with the composite sheet 5 and can reduce sliding friction with the composite sheet 5, and the ultrasonic horn 8 has a flat cylindrical shape and a circular cross section 16 perpendicular to the second axis 15. In the ultrasonic welding process, convert the high-frequency electric signal into the high-frequency vibration of ultrasonic bonding tool 8 through transducer 10, the diameter of ultrasonic bonding tool 8 is the high-frequency breathing in certain extent, the extrusion through to welding backing roll 2 is welded the sheet, make and take place the scraping between the composite sheet 5 that ultrasonic bonding tool 8 can not contact, make sliding friction alleviate between its and the composite sheet 5, because the sliding friction power between ultrasonic unit and the composite sheet alleviates, make the material especially adapted to the ultrasonic continuous welding under the high-speed operating mode, the fold of having avoided composite sheet 5 and the cotton fibre of ultrasonic bonding tool 8 department are piled up, the welding strength has been strengthened, the welding speed has been improved, and simultaneously, rolling ultrasonic bonding tool 8 can not cause the extrusion of continuity to composite sheet 5, the sheet oozing glue has been avoided.

Ultrasonic unit 1 still has amplitude transformer 9, transducer 10, cooling module, band pulley 12 and mounting bracket 13, and wherein ultrasonic horn 8, amplitude transformer 9 and transducer 10 constitute the triplex group, and this triplex group can rotate around second axis 15 under the effect of drive division 4, and wherein cooling module possesses fan 11 and is used for cooling down the transducer, guarantees the long-time work of equipment.

The driving part 4 is installed above the supporting frame 3, and drives the belt wheel 12 on the ultrasonic unit 1 to rotate around the self axial direction through the synchronous belt 6, so as to drive the ultrasonic welding head 8 and the transducer 10 to rotate. Further, a guide portion including a guide roller 7 for feeding the composite sheet 5 at a constant tension by coating the composite sheet 5 on the welding base roller 2 at a predetermined angle is provided on the upstream side of the welding portion.

Since the ultrasonic horn 8 has a limited length in the direction along the second axis 15, two ultrasonic units 1 can be selected when the range of the welding area for welding the base roller 2 is large.

The invention is described above with reference to the accompanying drawings. It is to be understood that the specific implementations of the invention are not limited in this respect. Various insubstantial improvements are made by adopting the method conception and the technical scheme of the invention; the present invention is not limited to the above embodiments, and can be modified in various ways.

Claims

1. An apparatus for manufacturing a composite sheet, characterized by comprising:

a welding part which is arranged in a continuous production line for conveying the composite sheet so as to enable the sheets on the specified position of the composite sheet to be combined with each other; wherein the content of the first and second substances,

the welding part is provided with an ultrasonic unit which can rotate around a first axis, and a welding bottom roller which is matched with the ultrasonic unit and can rotate synchronously with the composite sheet around a second axis parallel to the first axis, and the ultrasonic unit is provided with an ultrasonic welding head which is in contact with the composite sheet and can reduce sliding friction with the composite sheet.

2. The apparatus for manufacturing a composite sheet according to claim 1, wherein: the ultrasonic welding head is flat and cylindrical.

3. The manufacturing apparatus of a composite sheet according to claim 1 or 2, wherein: the ultrasonic welding head is circular on the section perpendicular to the second axis, the diameter of the ultrasonic welding head expands and contracts in a high frequency within a certain range during working, and sheets are welded through extrusion of the welding bottom roller.

4. The apparatus for manufacturing a composite sheet according to claim 1, wherein: the ultrasonic unit is provided with two at least.

5. The apparatus for manufacturing a composite sheet according to claim 1, wherein: the upstream side of the welding part is also provided with a guide part, and the guide part coats the composite sheet on the welding bottom roller at a certain angle so that the composite sheet is conveyed at a constant tension.

6. The manufacturing apparatus of a composite sheet according to claim 1 or 4, wherein: the ultrasonic generator further comprises a driving part which is used for providing power for the ultrasonic unit to rotate along the second axis.

7. The apparatus for manufacturing a composite sheet according to claim 6, wherein: the ultrasonic unit is also provided with an amplitude transformer and a transducer, and the ultrasonic welding head, the amplitude transformer and the transducer form a triple group which can rotate around a second axis under the action of the driving part.

8. The apparatus for manufacturing a composite sheet according to claim 7, wherein: the ultrasonic unit also has a cooling assembly for cooling the transducer.