CN217047517U

CN217047517U - Rotary ultrasonic welding device

Info

Publication number: CN217047517U
Application number: CN202220337094.1U
Authority: CN
Inventors: 夏双印; 蒋庆杰; 陈广岩
Original assignee: SHANGHAI ZHILIAN PRECISION MACHINERY CO Ltd
Current assignee: SHANGHAI ZHILIAN PRECISION MACHINERY CO Ltd
Priority date: 2022-02-20
Filing date: 2022-02-20
Publication date: 2022-07-26
Anticipated expiration: 2032-02-20

Abstract

The embodiment of the utility model provides a rotatory ultrasonic welding device for to being carried out the ultrasonic wave butt fusion by the welding thing in predetermined area, include, welding mechanism include that one rotates the anvil block that sets up and a pair of welding assembly who sets up along anvil block circumference: the anvil block comprises a butting surface, the welding assembly comprises a cylindrical welding head and an ultrasonic generating mechanism connected with the welding head, and the welding head is arranged corresponding to the butting surface; the welding head comprises a welding area positioned on the circumferential surface of the welding head, the pair of welding heads is arranged along the axial direction of the anvil in a staggered mode, the object to be welded comprises a pair of sub-areas, the expansion diagram of each welding area is matched with the shape of one of the sub-areas, and the pair of welding parts are configured to carry out ultrasonic welding on different sub-areas.

Description

Rotary ultrasonic welding device

Technical Field

The utility model relates to a rotatory ultrasonic welding device.

Background

In the disposable sanitary product, a plurality of layers of sheet materials need to be laminated, particularly, a peripheral seal needs to be formed by combining the sheet materials in the edge area of the product, so that the absorber is completely wrapped in the accommodating space formed by the surface layer and the bottom layer.

In the prior art, the peripheral seal embossing is usually formed in the form of heated rollers, but this method is inefficient, consumes high energy, and requires precise temperature control to prevent the high temperature from scalding the material, and ultrasonic welding is very suitable for joining multiple layers of sheet materials used for disposable sanitary products.

Some ultrasonic welding techniques have been used, and the welding devices used in these welding techniques generally comprise a welding head and an anvil, and when the material layer passes between the welding head and the anvil, the material layer is applied with pressure and ultrasonic waves by the welding head or the anvil to form a weld on the material layer, and in this way, the welding on the material layer can only be performed intermittently, and the production efficiency is extremely low, so that an improved technique for this way has been developed, for example, CN105934330A shows that several welding heads are radially arranged on a rotating roller, and in production, the material layer can pass through each welding head in turn, and the welding on the material layer can be completed by the several welding heads in turn.

In addition, there is a continuous welding apparatus, called a full-width ultrasonic welding apparatus, in which a cylindrical horn is included and a material layer is continuously welded by the cylindrical horn, but the welding apparatus is limited by physical rules, and the welding width of the welding apparatus is only 60mm at the maximum, and beyond this size, the welding efficiency is greatly reduced, and even the welding operation cannot be completed, and therefore, the welding apparatus can be used only for welding of a single seam or a small width and a small area.

However, since there are a large number of large-area material layer connections, such as peripheral seals, in disposable sanitary products, there is a need for a rotary ultrasonic welding apparatus that has a simple structure and can efficiently complete the large-area material layer connections.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a rotatory ultrasonic device in order to solve above-mentioned technical problem.

A rotary ultrasonic welding apparatus for ultrasonic welding of an object to be welded in a predetermined region, comprising,

the welding mechanism comprises an anvil block which is arranged in a rotating mode and a pair of welding assemblies which are arranged along the circumferential direction of the anvil block:

the anvil block comprises a butt joint surface, and the welding assembly comprises a cylindrical welding head and an ultrasonic generating mechanism connected with the welding head, wherein the welding head is arranged corresponding to the butt joint surface;

the welding head comprises a welding area positioned on the circumferential surface of the welding head, the pair of welding heads is arranged along the axial direction of the anvil in a staggered mode, the object to be welded comprises a pair of sub-areas, the expansion diagram of each welding area is matched with the shape of one of the sub-areas, and the pair of welding parts are configured to conduct ultrasonic welding on different sub-areas.

Furthermore, the welding mechanism comprises a first welding part and a second welding part, the welding assembly comprises a first welding assembly and a second welding assembly, the first welding assembly comprises a first welding head with a first welding area, the second welding assembly comprises a second welding head with a second welding area, the abutting surface comprises a first abutting area and a second abutting area, the first welding area and the first abutting area are correspondingly arranged and form a first welding part, the second welding area and the second abutting area of the second welding head are correspondingly arranged and form a second welding part, the pair of sub-areas comprises a first area and a second area which are separated by a virtual straight line, the first welding part is used for welding the first area, and the second welding part is used for welding the second area.

Further, the angle between the plane formed by the central axis of the first horn and the axis of rotation of the anvil and a vertical plane passing through the axis of rotation of the anvil is between 30 ° and 75 °.

Further, the second horn is symmetrically disposed with respect to the first horn along a vertical plane passing through the axis of rotation of the anvil.

Furthermore, the first welding head and the second welding head are arranged below the side of the anvil, and the welding mechanism further comprises an adjusting device for adjusting the position of the anvil along the vertical direction.

Furthermore, the frame structure includes a main support for mounting an anvil block, the main support includes a pair of mounting seats movably arranged along a vertical direction, the anvil block is rotatably arranged on the pair of mounting seats through a main shaft, the adjusting device includes an actuating device connected with the mounting seats, the main support includes an upper plate horizontally arranged above the mounting seats, one end of the actuating device is connected with the mounting seats, and the other end of the actuating device is arranged on the upper plate and can drive the mounting seats to move along the vertical direction.

Further, the welding mechanism further comprises a transition wheel which is arranged on a moving path of the welded object from the first welding part to the second welding part and is used for separating the welded object from the anvil.

Further, the object to be welded is configured to enter the first welding portion in the tangential direction of the anvil and enter the second welding portion in the tangential direction after passing through the transition wheel.

Furthermore, welding mechanism still including setting up the first guide roller at first weld part upstream, the second guide roller of second weld part downstream, first guide roller, second guide roller along a vertical plane symmetry setting through the anvil axis of rotation, first guide roller, second guide roller be located the anvil top, the transition wheel is located the anvil below.

Further, the conveying distance between the first welding part and the second welding part is equal to an integral multiple of the predetermined area length.

Has the advantages that: the embodiment of the utility model provides a rotatory ultrasonic welding device for to being carried out the ultrasonic wave butt fusion by the welding thing in predetermined area, include, welding mechanism include that one rotates the anvil block that sets up and a pair of welding assembly who sets up along anvil block circumference: the anvil block comprises an abutting surface, the welding assembly comprises a cylindrical welding head and an ultrasonic generating mechanism, the cylindrical welding head is arranged corresponding to the abutting surface, and the ultrasonic generating mechanism is connected with the welding head; the welding head comprises a welding area positioned on the circumferential surface of the welding head, the pair of welding heads is arranged along the axial direction of the anvil in a staggered mode, the object to be welded comprises a pair of sub-areas, the expansion diagram of each welding area is matched with the shape of one of the sub-areas, and the pair of welding parts are configured to carry out ultrasonic welding on different sub-areas.

Drawings

FIG. 1 is a schematic view of a rotary ultrasonic device according to the present invention;

FIG. 2 is a schematic view of a welding mechanism in the rotary ultrasonic device;

FIG. 3 is a perspective view of a rotary ultrasonic device according to an embodiment of the present invention;

FIG. 4 is a schematic view of the left side of FIG. 3;

fig. 5 is a schematic view of an ultrasonically welded work piece.

Description of the illustrated elements:

a back plate 11; through holes 111,112, 113; a main support 12; an upper plate 121; a mount 122; an actuating device 123;

side brackets

13, 14;

an anvil 20; a first weld 201; a second weld 202;

an abutting surface 21; a first contact region 211; a second abutment region 212;

a main shaft 22;

a first weld assembly 31; a first bonding head 311; a first ultrasonic wave generation mechanism 312; a first bonding region 3110; the

rotary shafts

314, 324;

a second weld assembly 32; a second welding head 321; a second land 3210;

a first guide roller 41; a second guide roller 42; a transition wheel 43; a

deviation rectifier

51, 52;

the object to be welded 60; a predetermined area 61; a first region 611; a second region 612.

Detailed Description

The embodiment of the utility model provides a rotatory ultrasonic welding device for to being welded thing 60 and carrying out ultrasonic welding at predetermined area 61, will combine the figure to further explain this application below.

Meanwhile, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation and operation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

For convenience of description, referring to fig. 5, the object 60 is a laminate of continuous sheet materials, and includes a longitudinal direction and a width direction, the longitudinal direction is an extending direction of the continuous sheet material, the width direction is a direction perpendicular to the extending direction, the width direction is also called a width direction, the longitudinal direction is a vertical direction in fig. 5, and the width direction is a horizontal direction.

The object 60 to be welded is ultrasonically welded in the predetermined area 61 by the rotary ultrasonic welding device, in the present embodiment, the object 60 to be welded is a breast pad composed of a surface layer, an absorption body and a bottom layer, the ultrasonic welding device in the present embodiment needs to weld the surface layer and the bottom layer along the periphery of the absorption body to form a circumferential seal in a substantially annular shape, that is, the predetermined area 61 in the present embodiment is an annular area corresponding to the circumferential seal, it can be understood that the object 60 to be welded in other embodiments may be other products, such as sanitary napkins and diapers, and the predetermined area 61 may have other required shapes.

The predetermined area 61 may be divided into a pair of sub-areas along a virtual straight line parallel to the length direction, specifically, the sub-areas include a right first area 611 and a left second area 612, it is understood that if the length and the width of the predetermined area 61 are L, W, respectively, and the length and the width of the first area 611 are L, W, respectively ₁ ，W ₁ The length and width of the second region 612 are L ₂ ，W ₂ Then, there are, L = L ₁ =L ₂ ，W=W ₁ +W ₂ 。

Referring to fig. 1-2, the present rotary ultrasonic welding apparatus is described, wherein the rotary ultrasonic welding apparatus includes a frame and a welding mechanism disposed on the frame, the welding mechanism includes an anvil 20 rotatably disposed and a pair of welding assemblies disposed along a circumferential direction of the anvil 20, and the welding mechanism includes a pair of welding portions.

The machine frame is used for supporting the welding mechanism and comprises a back plate 11 and a frame structure arranged on the back plate 11, the anvil block 20 is rotatably arranged on the machine frame, the anvil block 20 is cylindrical and comprises an abutting surface 21, the abutting surface 21 comprises a pair of abutting areas sequentially arranged along the axial direction, and it can be understood that the abutting surface 21 is the outer side surface of the anvil block 20, and the abutting areas are annular areas distributed on the abutting surface 21 along the axial direction.

The welding assembly comprises a pair of cylindrical welding heads and an ultrasonic generating mechanism connected with the welding heads, the welding heads are arranged along the axial direction of the anvil block 20 in a staggered mode, and the staggered mode refers to that the projection areas of the welding heads on the horizontal plane are not overlapped or only partially overlapped along the axial direction of the anvil block 20.

The welding head comprises a welding area, the welding area and the abutting area are arranged at intervals correspondingly, a slit is arranged between the welding area and the abutting area, each welding part comprises a pair of the welding area and the abutting area which are arranged correspondingly, and the welding part is configured to carry out ultrasonic welding on a sub-area of one of the pair of sub-areas.

In the present embodiment, the pair of welding assemblies are a first welding assembly 31 and a second welding assembly 32, the pair of welding portions includes a first welding portion 201 corresponding to the first welding assembly 31 and a second welding portion 202 corresponding to the second welding assembly, please refer to fig. 3-4, specifically, the frame structure includes a main support 12 for mounting the anvil 20 and side supports (13, 14) for mounting the welding assemblies, two side supports (13, 14) are provided for respectively fixing the first welding assembly 31 and the second welding assembly 32, the main support 12 includes spaced columns, the anvil 20 includes a main shaft 22 rotating around an axis, the main support 12 includes a pair of mounting seats 122, and two ends of the main shaft 22 are respectively rotatably disposed on the pair of mounting seats 122.

The side brackets (13, 14) are positioned at two sides of the main bracket 12 and respectively comprise a pair of seat plates, and the welding assembly comprises rotating shafts (314, 324) which are rotatably arranged on the seat plates through the rotating shafts (314, 324).

The first welding assembly 31 includes a first welding head 311 in a cylindrical shape, which is rotatably disposed, a circumferential surface of the first welding head 311 is capable of welding the object 60 to be welded, the circumferential surface is provided with a first welding area 3110, the expansion view of the first welding area 3110 is matched with the shape of the first area 611, in this embodiment, the predetermined area 61 is substantially a circular ring, the first zone 611 is a half circular ring, therefore, the first weld zone 3110 is substantially half-circular in shape in its developed view, the first ultrasonic wave generator 312 is connected to the first horn 311, the first ultrasonic wave generator 312 can generate ultrasonic waves and transmit high-frequency vibrations to the object 60 to be welded via the first horn 311 to weld the object 60 to be welded, in this embodiment, the first ultrasonic generating mechanism 312 includes a pair of transducers respectively disposed on both sides of the first welding head 311.

The first welding head 311 is connected to the rotating shafts (314, 324), so that the first welding head 311 can rotate by the rotating shafts (314, 324) and continuously weld the object to be welded 60 passing through the slit by the first welding zone 3110.

It is understood that the second welding assembly 32 includes a second welding head 321, the second welding head 321 includes a second welding zone 3210 in a left semicircular shape, and the object 60 is welded by the first welding portion 201 and the second welding portion 202 in sequence to form a complete circular predetermined area 61.

It is understood that the overall structure of the second welding assembly 32 is substantially the same as the first welding assembly 31 and will not be described in detail herein.

Because the first welding head 311 and the second welding head 321 are arranged at intervals along the circumferential direction of the anvil 20 and are arranged at a position offset along the axial direction of the anvil 20, the first welding part 201 and the second welding part 202 are located at different positions, and the first zone 611 and the second zone 612 can be welded.

The abutting surface 21 includes a first abutting region 211 and a second abutting region 212, wherein the first welding region 3110 of the first welding head 311 is disposed corresponding to the first abutting region 211 to form a first welding portion 201, the second welding region 3210 of the second welding head 321 is disposed corresponding to the second abutting region 212 to form a second welding portion 202 for forming a predetermined shape,

it is understood that first welding portion 201 and second welding portion 202 should weld only first zone 611 and second zone 612, respectively, and cannot weld an area repeatedly, so that welded object 60 forms predetermined area 61 after being welded by first welding portion 201 and second welding portion 202 in sequence.

Further, the first welding head 311 and the second welding head 321 are separated from each other in the axial direction of the anvil 20, so as to prevent the first welding head 311 and the second welding head 321 from repeatedly welding the overlapped area of the two welding heads of the object 60 to be welded, which may damage the object 60 to be welded.

Further, referring to fig. 1, the welding mechanism further includes a first guide roller 41 disposed upstream of the first welding portion 201, a second guide roller 42 disposed downstream of the second welding portion 202, and a transition wheel 43 disposed between the first welding assembly 31 and the second welding assembly 32, wherein the object 60 to be welded enters the first welding portion 201 along a tangential direction of the anvil 20, passes through the transition wheel 43, enters the second welding portion 202 along the tangential direction again, and leaves the welding mechanism along the second guide roller 42, it can be understood that the object 60 to be welded leaves the anvil 20 after passing through the first welding head 311, i.e. the object is only adhered to the first welding head 311 and the anvil 20 at a position corresponding to the first welding portion 201, and similarly, the object is only adhered to the second welding head 321 and the anvil 20 at a position corresponding to the second welding portion 202, thereby avoiding simultaneous welding of the first welding head 311 and the second welding head 321, the welded object 60 is affected by the anvil 20, and at the same time, since the temperature of the anvil 20 and the welded object 60 rises during the welding process, the welded object 60 is separated from the anvil 20 by the transition wheel 43, not only can the anvil 20 have a certain heat dissipation space to keep the temperature constant and stabilize the temperature of the welded object 60 during two or more welding processes, but also the welded object 60 can have a longer moving path by the transition wheel 43, so that the welded object 60 has a certain relaxation space even under the influence of the temperature, and can be aligned with the position of the first zone 611 formed by the first welding part 201 when entering the second welding part 202, thereby forming a complete predetermined zone 61.

Further, a deviation rectifier (51, 52) is provided upstream of the first guide roller 41 and downstream of the second guide roller 42, respectively, so that the object to be welded 60 moves along a predetermined path, so that the first welding portion 201 welds the first zone 611 and the second welding portion 202 welds the second zone 612.

Further, the rotation axis of the transition wheel 43 is located on a vertical plane passing through the rotation axis of the anvil 20, and the rotation axis of the transition wheel 43 is parallel to the rotation axis of the anvil 20.

Further, the first guide roller 41 and the second guide roller 42 are symmetrically disposed along a vertical plane passing through the rotation axis of the anvil 20, and preferably, the first guide roller 41 and the second guide roller 42 are disposed above the anvil 20, and the transition wheel 43 is disposed below the anvil 20.

Further, the angle between the plane formed by the central axis of the first horn 311 and the axis of rotation of the anvil 20 and the vertical plane passing through the axis of rotation of the anvil 20 is 30 ° to 75 °, and preferably, the second horn 321 is arranged symmetrically to the first horn 311 along the vertical plane passing through the axis of rotation of the anvil 20.

Further, the welding mechanism further includes an adjusting device, the mounting seat 122 is movably disposed on the main support 12, the adjusting device includes an actuating device 123 connected to the mounting seat 122, the main support 12 includes an upper plate 121 horizontally disposed above the mounting seat 122, one end of the actuating device 123 is connected to the mounting seat, and the other end of the actuating device 123 is disposed on the upper plate 121, and can drive the mounting seat 122 to move along a vertical direction, so as to adjust a distance between the mounting seat 122 and the upper plate 121, in the present embodiment, the first welding head 311 and the second welding head 321 are disposed below a side of the anvil 20, when the mounting seat 122 moves up and down, the anvil 20 disposed on the main shaft 22 moves up and down, so as to adjust a gap width between the first welding portion 201 and the second welding portion 202, on one hand, by adjusting a gap between the first welding portion 201 and the second welding portion 202, to adapt to welding of objects 60 to be welded with different thicknesses, in the third aspect, when the welding mechanism is in operation, when a material winding phenomenon occurs at the first welding portion 201 or the second welding portion 202, the mounting base is lifted, so as to increase the gap width of the first welding portion 201 or the second welding portion 202, thereby facilitating taking out and cleaning the material winding, in the present embodiment, the actuating device 123 is an air cylinder.

Further, the adjusting device further includes a guiding device disposed between the mounting seat 122 and the main support 12, so that the mounting seat 122 can stably move along a direction defined by the guiding device, in this embodiment, the guiding device includes a guide block disposed on the mounting seat 122 and a guide groove disposed on the main support 12 and matched with the guide block.

Further, a transmission device is arranged between the main shaft 22 and the rotating shafts (314, 324), so that the anvil 20 connected with the main shaft 22 and the first welding head 311 and the second welding head 321 connected with the rotating shafts (314, 324) move synchronously, the welded object 60 entering the slit is welded by the first welding head 311 and the second welding head 321, and simultaneously, the welded object is driven by the first welding head 311, the second welding head 321 and the anvil 20 to move continuously in the downstream direction, and the welded object 60 is continuously welded.

Furthermore, the back plate 11 is provided with through holes (111, 112, 113) corresponding to the main shaft 22 and the rotating shafts (314, 324), so that the frame structure can be easily fixed on the back plate 11, and meanwhile, the main shaft 22 and the rotating shafts (314, 324) have installation spaces.

It can be understood that, in the present embodiment, the welded object 60 is conveyed from the right side to the first welded part 201 via the deviation rectifier (51, 52) and the first guide roller 41, the object 60 to be welded is formed into the form of the first zone 611 by the ultrasonic heating action of the first welding head 311, is conveyed to the second welding part 202 via the transition wheel 43, the welded object 60 is formed into the form of the second zone 612 by the ultrasonic heating action of the second welding head 321 from the second welding zone 3210, it will be appreciated that, given that the transport distance between the first weld 201 and the second weld 202 should be equal to an integer multiple of L, so that the second zone 612 is formed in exactly the same position as the first zone 611, thus forming a complete, predetermined configuration, which, in this way, the ultrasonic welding can be continuously carried out, and meanwhile, the device is relatively simple in structure and easy to adjust.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A rotary ultrasonic welding apparatus for ultrasonically welding an object to be welded in a predetermined region, comprising,

the anvil block comprises a butting surface, the welding assembly comprises a cylindrical welding head and an ultrasonic generating mechanism, the cylindrical welding head is arranged corresponding to the butting surface, and the ultrasonic generating mechanism is connected with the welding head;

2. The rotary ultrasonic welding apparatus of claim 1, wherein the welding mechanism comprises a first weld and a second weld, the weld assembly comprises a first weld assembly and a second weld assembly, the first weld assembly comprises a first horn having a first weld zone, the second weld assembly comprises a second horn having a second weld zone, the abutment surface comprises a first abutment zone and a second abutment zone, the first weld zone is disposed in correspondence with the first abutment zone and forms the first weld, the second weld zone of the second horn is disposed in correspondence with the second abutment zone and forms the second weld, and a pair of sub-zones comprises a first zone and a second zone separated by a virtual line, the first weld is for welding to the first zone, and the second weld is for welding to the second zone.

3. The rotary ultrasonic welding apparatus of claim 2 wherein the angle between the plane formed by the central axis of the first horn and the axis of rotation of the anvil and a vertical plane passing through the axis of rotation of the anvil is between 30 ° and 75 °.

4. The rotary ultrasonic welding apparatus of claim 2, wherein the second horn is disposed symmetrically to the first horn along a vertical plane passing through the axis of rotation of the anvil.

5. The rotary ultrasonic welding apparatus of claim 3 or 4 wherein the first and second horn are disposed laterally below the anvil, and wherein the welding mechanism further comprises means for adjusting the position of the anvil in a vertical direction.

6. The rotary ultrasonic welding apparatus of claim 5, further comprising a frame structure, wherein the frame structure comprises a main frame for mounting an anvil, the main frame comprises a pair of vertically movably disposed mounting seats, the anvil is rotatably disposed on the pair of mounting seats through a main shaft, the adjusting device comprises an actuating device connected to the mounting seats, the main frame comprises an upper plate horizontally disposed above the mounting seats, and one end of the actuating device is connected to the mounting seats while the other end is disposed on the upper plate and can drive the mounting seats to move vertically.

7. The rotary ultrasonic welding apparatus of claim 5 wherein the welding mechanism further comprises a transition wheel disposed on a path of movement of the work piece from the first weld to the second weld for separating the work piece from the anvil.

8. The rotary ultrasonic welding apparatus of claim 7, wherein the work piece is configured to enter the first weld portion tangentially of the anvil and to enter the second weld portion tangentially after passing through the transition wheel.

9. The rotary ultrasonic welding apparatus of claim 7 wherein the welding mechanism further comprises a first guide roller disposed upstream of the first weld and a second guide roller disposed downstream of the second weld, the first and second guide rollers being symmetrically disposed along a vertical plane passing through the axis of rotation of the anvil, the first and second guide rollers being disposed above the anvil and the transition wheel being disposed below the anvil.

10. The rotary ultrasonic welding apparatus of claim 2, wherein the feed distance between the first weld and the second weld is equal to an integral multiple of the predetermined zone length.