CN110091510B - Ultrasonic welding device - Google Patents
Ultrasonic welding device Download PDFInfo
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- CN110091510B CN110091510B CN201910459918.5A CN201910459918A CN110091510B CN 110091510 B CN110091510 B CN 110091510B CN 201910459918 A CN201910459918 A CN 201910459918A CN 110091510 B CN110091510 B CN 110091510B
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- 238000003466 welding Methods 0.000 title claims abstract description 112
- 239000000463 material Substances 0.000 claims abstract description 37
- 238000010276 construction Methods 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000003825 pressing Methods 0.000 claims description 51
- 230000007246 mechanism Effects 0.000 claims description 34
- 238000011144 upstream manufacturing Methods 0.000 claims description 8
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 230000006835 compression Effects 0.000 abstract description 4
- 238000007906 compression Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 9
- 229920001169 thermoplastic Polymers 0.000 description 4
- 239000004416 thermosoftening plastic Substances 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 210000001015 abdomen Anatomy 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000003187 abdominal effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002175 menstrual effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The invention discloses an ultrasonic welding device, which is provided with an ultrasonic welding head and an anvil roller matched with the ultrasonic welding head, wherein the anvil roller is provided with a rotation center, and the ultrasonic welding head is provided with an end surface for endowing welding energy to materials; the ultrasonic horn also comprises a first construction intersection line which passes through the rotation center and is perpendicular to the end face of the ultrasonic horn, and a second construction intersection line which is positioned at the middle position of the end face of the ultrasonic horn and is perpendicular to the end face of the ultrasonic horn, wherein the first construction intersection line and the second construction intersection line are mutually parallel, and the first construction intersection line is offset towards the downstream side relative to the second construction intersection line. The invention makes proper deviation of the anvil roll position relative to the central line of the ultrasonic welding head, so that when the material passes through the gap between the ultrasonic welding head and the anvil roll, the material has larger initial compression gap at the inlet, effectively prevents the cutting risk of the material in the welding process, simultaneously is beneficial to improving the welding strength and reducing the shutdown rate of equipment.
Description
Technical Field
The invention relates to the field of manufacturing of disposable sanitary equipment, in particular to an ultrasonic welding device for preventing materials from being cut off.
Background
Conventionally, as a disposable sanitary article, for example, a disposable sanitary article having a front abdomen, a back and a crotch, and in which the front abdomen and the back are ultrasonically welded by a pair of side seals (or welded portions) is known. In forming the side seal, a thermoplastic sheet for constituting the front abdominal portion and the back portion is continuously supplied to an anvil roll rotatable about a predetermined axis, and is disposed between ultrasonic horn members disposed so as to face the outer peripheral surface of the anvil roll in cooperation with the anvil roll. The thermoplastic sheets are supplied between the anvil roll and the ultrasonic horn in a state of being opposed to each other, and when the thermoplastic sheets continuously supplied between the anvil roll and the ultrasonic horn are intermittently subjected to ultrasonic welding at a cycle in which the anvil roll approaches the ultrasonic horn. Accordingly, a welded portion is formed in which thermoplastic sheets facing each other are welded to each other.
Since the conventional ultrasonic horn is arranged concentrically with the anvil, specifically, if a perpendicular line L1 is drawn in the direction of the end face of the ultrasonic horn from the rotation center O1 of the anvil, the perpendicular line L1 coincides with the center line L2 of the end face of the ultrasonic horn, and since the gap B1 between the ultrasonic horn and the anvil is smaller (as shown in fig. 9), the risk of cutting off the material during welding is greatly increased, resulting in an increase in the downtime of the apparatus.
Meanwhile, the problem of product code changing is often involved in the production process, and the common practice is as follows: the diameter of the welding mechanism of the welding device is changed to enlarge or reduce the circumferential arc length so as to achieve the purpose of changing the size, and therefore the whole welding mechanism of the welding device is required to be changed, namely, the welding mechanism with various types corresponding to products with different sizes is provided, so that the traditional device has the defects of high manufacturing cost, long time consumption, influence on field production efficiency and the like.
In addition, in the conventional ultrasonic welding apparatus, since there is no material clamping mechanism before and after the welding station, the ultrasonic energy load applied to the anvil roll when the ultrasonic horn is in operation is large, and the material to be welded is liable to shake, which results in a decrease in the accuracy of the welding position and a decrease in the quality of the welded portion.
Disclosure of Invention
In order to overcome the problems, the invention provides an ultrasonic welding device, which solves the problems of high equipment outage rate caused by easy cutting of materials in the traditional device.
The technical scheme adopted for solving the technical problems is as follows: an ultrasonic welding device for intermittently welding a plurality of pre-welding areas arranged at equal intervals on a sheet material strip, the ultrasonic welding device comprising an ultrasonic welding head and an anvil roll cooperating with the ultrasonic welding head, wherein the sheet material strip is continuously conveyed from an upstream side to a downstream side to a gap between the ultrasonic welding head and the anvil roll so as to be welded with each other, the anvil roll is provided with a rotation center, and the ultrasonic welding head is provided with an end face for applying welding energy to a material; the ultrasonic horn also comprises a first construction intersection line which passes through the rotation center and is perpendicular to the end face of the ultrasonic horn, and a second construction intersection line which is positioned at the middle position of the end face of the ultrasonic horn and is perpendicular to the end face of the ultrasonic horn, wherein the first construction intersection line and the second construction intersection line are mutually parallel, and the first construction intersection line is offset towards the downstream side relative to the second construction intersection line. By adopting the technical scheme, the first construction intersection line is offset towards the downstream side direction relative to the second construction intersection line, so that the initial compression gap when welding materials enter the welding area is increased, the cutting risk of the materials in the welding process is effectively prevented, the welding strength is improved, and the shutdown rate of equipment is reduced.
Further, the first formation intersection has an offset feature relative to the second formation intersection in a direction of travel of the sheet web and offset by a distance of 2-5mm. In addition, the anvil roll has a slight gap from the end face of the ultrasonic horn, and the distance of the gap is 0.01-0.1mm.
In order to solve the problems of high code changing cost and time and labor waste of the traditional device, N pattern parts are correspondingly arranged on the anvil roll, the pattern parts are matched with the ultrasonic welding heads to weld the pre-welding areas of the sheet material strips to each other, and the device also comprises a servo driving mechanism for driving the anvil roll to rotate at a constant speed or periodically at a variable speed; when the pattern on the anvil roll passes through the end face of the ultrasonic welding head, the surface linear speed of the anvil roll is equal to the travelling linear speed of the sheet material strip under the action of the servo driving mechanism. By adopting the technical scheme, when the product is changed in size, ultrasonic welding of a plurality of product sizes can be realized by adopting one anvil roll through adopting the periodical speed-changing design of the servo driving mechanism, so that the manufacturing cost and the labor intensity of workers are greatly reduced. The above N may be any integer of 1, 2, 3 … ….
Further, the servo driving mechanism comprises a servo motor, a speed reducer and a coupler, and the servo motor is connected with the anvil roll through the speed reducer and the coupler, so that the anvil roll performs constant-speed or periodical variable-speed rotary motion.
Further, when the anvil roll rotates in a periodic variable speed manner, the anvil roll rotates for one turn, the anvil roll performs N variable speed cycles, each variable speed cycle comprises a constant speed interval and a variable speed interval, and the angle of the constant speed interval is 20-50 degrees. Further, the angular bisector of the uniform velocity section coincides with the first structural intersection.
Further, the circumference of one rotation of the anvil roll is S0, and the interval between adjacent pre-welding areas is S1; when S0/N=S1, the anvil roll rotates at a constant speed, and when S0/N is not equal to S1, the anvil roll rotates at a periodic variable speed. Specifically, when S0/N > S1, the anvil roll rotates once, the anvil roll carries out N speed change cycles, each speed change cycle comprises a low-speed uniform speed interval and a speed change interval, the pattern part passes through the end face of the ultrasonic welding head at the low-speed uniform speed interval in the speed change cycle, the angle g1 of the low-speed uniform speed interval is 20-50 degrees, and the angle of the speed change interval is 360 degrees/N-g 1. When S0/N < S1, the anvil roll rotates once, the anvil roll carries out N speed change cycles, each speed change cycle comprises a high-speed uniform speed section and a speed change section, the pattern part passes through the end face of the ultrasonic welding head at the high-speed uniform speed section in the speed change cycle, the angle g1 of the high-speed uniform speed section is 20-50 degrees, and the angle of the speed change section is 360 degrees/N-g 1.
Further, the number of speed change cycles experienced by one revolution of the anvil roll is equal to the number of pattern portions on the anvil roll. The welded product is disposable sanitary product, such as baby pull-up pants, adult pull-up pants, menstrual pants, etc.
In order to solve the problems of easy shaking of materials, low welding position precision and low quality of the traditional device, the ultrasonic welding device is provided with a welding station consisting of the ultrasonic welding head and an anvil roll and a clamping station for holding the sheet material strip. The clamping stations are respectively arranged at the upstream side and the downstream side of the welding station, and are provided with belt pressing and conveying mechanisms for ensuring the flatness and the tension of the sheet-shaped object strips.
Further, the belt pressing and conveying mechanism comprises an upper pressing belt and a lower pressing belt, the upper pressing belt and the lower pressing belt are driven by power, and the surface linear speeds of the upper pressing belt and the lower pressing belt are the same. For the same group of belt pressing and conveying mechanisms, the upper pressing belt and the lower pressing belt can be respectively connected with a driving motor, and the surface linear speeds of the upper pressing belt and the lower pressing belt are consistent by controlling the rotating speed of the driving motor; the upper pressing belt and the lower pressing belt can be connected with a synchronous mechanism, and the aim is achieved through one motor.
In order to more effectively prevent the bad influence of product shake and fold problem on ultrasonic welding, the upper pressing belt and the lower pressing belt preferably adopt sponge belts, so that the tension of materials can be absorbed, the welding effect is ensured, and meanwhile, the appearance of the product is improved. Further, the upper pressing belt can move up and down in a vertical plane relative to the lower pressing belt, and in the working process, the upper pressing belt applies a pressure to the lower pressing belt, and the pressure is adjustable. The upward-pressing belt moves up and down in the vertical plane relative to the downward-pressing belt, so that the pressure value can be correspondingly adjusted according to specific working conditions.
As a further preferred aspect of the present invention, the belt pressing mechanism is provided with two sets including a first belt pressing mechanism located on the upstream side of the welding station and a second belt pressing mechanism located on the downstream side of the welding station. The belt surface line speed of the second belt pressing mechanism is greater than or equal to the belt surface line speed of the first belt pressing mechanism.
The invention has the beneficial effects that:
1. the invention makes proper deviation of the anvil roll position relative to the central line of the ultrasonic welding head, so that when the material passes through the gap between the ultrasonic welding head and the anvil roll, the material has larger initial compression gap at the inlet, effectively prevents the cutting risk of the material in the welding process, simultaneously is beneficial to improving the welding strength and reducing the shutdown rate of equipment.
2. The invention changes the rotation speed of the anvil roller through the servo driving mechanism, thereby realizing that the anvil roller designed according to a certain diameter can be matched with the production speed of products with different sizes, being suitable for the welding production of products with multiple sizes, greatly reducing the labor intensity of workers and reducing the manufacturing cost of the device.
3. The invention can ensure that the product has good flatness and tension characteristics when passing through an ultrasonic welding station, thereby ensuring that the sheet material strip is more beneficial to the implementation of ultrasonic welding, improving the aesthetic degree of the product and preventing the adverse effect of the product shake and fold on the ultrasonic welding.
Drawings
Fig. 1 is a schematic diagram of the structure of the present invention.
Fig. 2 is a schematic diagram of the present invention.
Fig. 3 is a schematic structural view of the present invention.
Fig. 4 is an enlarged view of a portion of the present invention illustrating the offset of the first construction intersection relative to the second construction intersection.
Fig. 5 is a graph of angular displacement versus time for the anvil roll of example 1.
Fig. 6 is a graph of angular velocity versus time for the anvil roll of example 1.
Fig. 7 is a graph of angular displacement versus time for the anvil roll of example 2.
Fig. 8 is a graph of angular velocity versus time for the anvil roll of example 2.
Fig. 9 is a schematic view of a conventional apparatus material entering between an ultrasonic horn and an anvil roll.
Fig. 10 is a schematic view of the improved entry of the inventive material between an ultrasonic horn and an anvil roll.
Detailed Description
The present invention will be described below with reference to the drawings of embodiments of the present invention.
As shown in fig. 1 to 2, an ultrasonic welding apparatus for intermittently welding a plurality of pre-welding areas 102 arranged at equal intervals on a plurality of kinds of sheet strips 101 has an ultrasonic horn 1 and an anvil roll 2 fitted thereto, N pattern portions 3 are provided on the anvil roll 2, and the sheet strips 101 are continuously conveyed from an upstream side MD1 to a downstream side MD2 to a gap between the ultrasonic horn 1 and the pattern portions 3 of the anvil roll 2 to be welded to each other. The arrow in fig. 1 illustrates the direction of travel of the material.
A servo driving mechanism for driving the anvil roll 2 to rotate at a constant speed or periodically variable speed is also arranged on the anvil roll 2, and comprises a servo motor 4, a speed reducer 5 and a coupler 6, wherein the servo motor 4 is connected with the anvil roll 2 through the speed reducer 5 and the coupler 6.
When the pattern 3 on the anvil roll 2 passes through the end face 7 of the ultrasonic horn 1, the linear velocity of the surface of the anvil roll 2 is equal to the linear velocity of the sheet strip 101 under the action of the servomotor 4.
The circumferential length of one rotation of the anvil roll 2 is S0, and the pitch between adjacent pre-welding areas 102 is S1.
1) When S0/n=s1, the anvil roll 2 rotates at a constant speed.
2) When S0/N is not equal to S1, the anvil roll 2 rotates periodically at variable speed, at this time, the anvil roll 2 performs N variable speed cycles each time the anvil roll 2 rotates once, each variable speed cycle comprises a constant speed section g1 and a variable speed section, the angle of the constant speed section g1 is 20-50 degrees, and the angle of the variable speed section is 360 degrees/N-g 1.
Specifically, when S0/N > S1, the anvil roll rotates once, the anvil roll carries out N speed change cycles, each speed change cycle comprises a low-speed uniform speed interval and a speed change interval, the pattern part passes through the end face of the ultrasonic welding head at the low-speed uniform speed interval in the speed change cycle, the angle g1 of the low-speed uniform speed interval is 20-50 degrees, and the angle of the speed change interval is 360 degrees/N-g 1;
when S0/N < S1, the anvil roll rotates once, the anvil roll carries out N speed change cycles, each speed change cycle comprises a high-speed uniform speed section and a speed change section, the pattern part passes through the end face of the ultrasonic welding head at the high-speed uniform speed section in the speed change cycle, the angle g1 of the high-speed uniform speed section is 20-50 degrees, and the angle of the speed change section is 360 degrees/N-g 1.
More specifically, as shown in fig. 4 and 10, an ultrasonic welding apparatus is provided for intermittently welding a plurality of equally spaced pre-welding areas 102 on a sheet strip 101. Wherein the anvil roll 2 has a centre of rotation O1 and the ultrasonic horn has an end face 7 for imparting welding energy to the material. The device also comprises: a first structural intersection line L1 passing through the rotation center O1 and perpendicular to the ultrasonic horn end surface 7, and a second structural intersection line L2 located at the intermediate position O3 of the ultrasonic horn end surface 7 and perpendicular to the ultrasonic horn end surface 7, the first structural intersection line L1 and the second structural intersection line L2 being parallel to each other, and the first structural intersection line L1 being offset in the downstream side direction with respect to the second structural intersection line L2. Through offset setting of first structure intersection L1 for second structure intersection L2 towards the low reaches side direction, increased initial compression clearance B2 when welding material gets into the welded zone, and B2> B1, and then effectively prevented the material and cut off the risk in the welding process, help improving welding strength simultaneously.
The first construction intersection line L1 is offset from the second construction intersection line L2 by a distance X of 2-5mm. The distance Y from the anvil roll 2 to the end face of the ultrasonic horn 1 is 0.01-0.1mm.
The angular bisector of the uniform velocity section g1 coincides with the first structural intersection line L1. The uniform velocity section g1 is symmetrically distributed with the first structure intersection line L1 as a symmetry line. When the first structural intersection line L1 coincides with the second structural intersection line L2, the rotation center O1 of the anvil roll, the pattern portion midpoint O2, and the midpoint O3 of the ultrasonic horn end face 7 are on the same line, and in this way, although welding can be completed, there is a risk of material cutting during welding. Therefore, it is preferable that the first structural intersection line L1 is offset with respect to the second structural intersection line L2.
In order to prevent the adverse effects of product shake and wrinkling on ultrasonic welding, belt pressing mechanisms are further provided before and after the welding station of the sheet material strip 101, respectively, and the sheet material strip sequentially passes through the belt pressing mechanism at the inlet side, then passes through the ultrasonic welding station, and then is output through the belt pressing mechanism at the outlet side in the advancing process.
The ultrasonic welding apparatus will be further described with reference to fig. 3.
As shown in fig. 3, an ultrasonic welding apparatus for intermittently welding a plurality of equally spaced pre-welding areas 102 on a sheet strip 101 has a welding station 103 and a clamping station 104 for holding the sheet strip.
The clamping station is described in detail below.
The clamping stations 104 are respectively arranged on the upstream side and the downstream side of the welding station 103, and are provided with belt pressing and conveying mechanisms for ensuring flatness and tension of the sheet material belt 101, the belt pressing and conveying mechanisms comprise an upper pressing belt 8 and a lower pressing belt 9, the upper pressing belt 8 and the lower pressing belt 9 are driven by power, and the surface linear speeds of the upper pressing belt 8 and the lower pressing belt 9 are the same. The upper press belt 8 is movable up and down in a vertical plane relative to the lower press belt 9, and the upper press belt 8 applies a pressure to the lower press belt 9 during operation, and the magnitude of the pressure is adjustable.
The belt press mechanisms are provided in two groups, including a first belt press mechanism 105 located on the upstream side of the welding station 103, and a second belt press mechanism 106 located on the downstream side of the welding station. Wherein the belt surface linear velocity of the second belt press mechanism 106 is greater than or equal to the belt surface linear velocity of the first belt press mechanism 105.
In the case of example 1,
taking the number n=2 of pattern portions on the surface of the anvil roll, the circumference s0=800 mm of one revolution of the anvil roll, the pre-welding area spacing s1=300 mm of the sheet strip surface, g1=40°, the angular displacement-time curve and the angular velocity-time curve required for anvil roll speed change at a production speed of 600 sheets per minute are shown in fig. 5 to 6.
In the case of example 2,
the weld zone spacing s1=500 mm of the sheet strip surface was taken and the remaining parameters were the same as in example 1, with the angular displacement versus time profile and angular velocity versus time profile required for anvil roll shifting being shown in fig. 7-8.
The foregoing description and the drawings illustrate only the preferred embodiments of the present invention, but the scope of the present invention is not limited thereto, and it should be understood that the technical scheme and the inventive concept according to the present invention are equivalent or changed within the scope of the present invention by those skilled in the art to which the present invention pertains.
Claims (6)
1. An ultrasonic welding device for intermittently welding a plurality of pre-welding areas arranged at equal intervals on a sheet material strip, the ultrasonic welding device comprising an ultrasonic welding head and an anvil roll cooperating with the ultrasonic welding head, wherein the sheet material strip is continuously conveyed from an upstream side to a downstream side to a gap between the ultrasonic welding head and the anvil roll so as to be welded with each other, the anvil roll is provided with a rotation center, and the ultrasonic welding head is provided with an end face for applying welding energy to a material; the method is characterized in that: the ultrasonic welding head also comprises a first construction intersection line which passes through the rotation center and is perpendicular to the end face of the ultrasonic welding head, and a second construction intersection line which is positioned at the middle position of the end face of the ultrasonic welding head and is perpendicular to the end face of the ultrasonic welding head, wherein the first construction intersection line and the second construction intersection line are mutually parallel, and the first construction intersection line is offset towards the downstream side relative to the second construction intersection line; the offset distance of the first construction intersection line relative to the second construction intersection line is 2-5mm;
the anvil roll is correspondingly provided with N pattern parts and further comprises a servo driving mechanism for driving the anvil roll to rotate at a constant speed or periodically at a variable speed; when the pattern part on the anvil roll passes through the end face of the ultrasonic welding head, under the action of a servo driving mechanism, the surface linear speed of the anvil roll is equal to the travelling linear speed of the sheet material strip;
the circumference of the anvil roll rotating for one circle is S0, and the interval between adjacent pre-welding areas is S1; when S0/N=S1, the anvil roll rotates at a constant speed, when S0/N is not equal to S1, the anvil roll periodically rotates at variable speed, and when the anvil roll rotates for one circle, the anvil roll performs N variable speed cycles, each variable speed cycle comprises a constant speed interval and a variable speed interval, the angle of the constant speed interval is 20-50 degrees, and the angle of the variable speed interval is 360 degrees/N-g 1; and the angular bisector of the uniform speed interval coincides with the first construction intersection line.
2. The ultrasonic welding apparatus of claim 1, wherein: the distance from the anvil roll to the end face of the ultrasonic welding head is 0.01-0.1mm.
3. The ultrasonic welding apparatus of claim 1, wherein: the servo driving mechanism comprises a servo motor, a speed reducer and a coupler, and the servo motor is connected with the anvil roll through the speed reducer and the coupler.
4. The ultrasonic welding apparatus of claim 1, wherein: the ultrasonic welding device is provided with a welding station consisting of an ultrasonic welding head and an anvil roll, and a clamping station for holding a sheet-shaped object strip; the clamping stations are respectively arranged at the upstream side and the downstream side of the welding station, and are provided with belt pressing and conveying mechanisms for ensuring the flatness and the tension of the sheet-shaped object strips.
5. The ultrasonic welding apparatus of claim 4, wherein: the belt pressing and conveying mechanism comprises an upward pressing belt and a downward pressing belt, wherein the upward pressing belt and the downward pressing belt are driven by power, and the surface linear speeds of the upward pressing belt and the downward pressing belt are the same.
6. The ultrasonic welding apparatus of claim 5, wherein: the upper pressing belt can move up and down in a vertical plane relative to the lower pressing belt, and in the working process, the upper pressing belt applies a pressure to the lower pressing belt, and the pressure is adjustable.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910459918.5A CN110091510B (en) | 2019-05-30 | 2019-05-30 | Ultrasonic welding device |
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|---|---|---|---|
| CN201910459918.5A CN110091510B (en) | 2019-05-30 | 2019-05-30 | Ultrasonic welding device |
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| CN110091510A CN110091510A (en) | 2019-08-06 |
| CN110091510B true CN110091510B (en) | 2024-02-13 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111361168A (en) * | 2020-03-20 | 2020-07-03 | 深圳市博泰数码智能技术有限公司 | Positioning welding mask machine |
| CN111664222B (en) * | 2020-05-27 | 2021-11-30 | 上海久罗机电设备有限公司 | Chicken manure conveyer belt welding machine |
| CN112872575B (en) * | 2021-02-25 | 2022-05-10 | 福建恒安集团有限公司 | Ultrasonic double-head sealing device and sealing process thereof |
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Address after: 18 No. 245000, Penglai Road, Huangshan City Economic Development Zone, Anhui Applicant after: Huangshan Futian Precision Manufacturing Co.,Ltd. Address before: 18 No. 245000, Penglai Road, Huangshan City Economic Development Zone, Anhui Applicant before: HUANGSHAN FUTIAN MACHINERY Co.,Ltd. |
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