An ultrasonic welding device

Abstract

The application relates to the technical field of ultrasonic welding, and particularly provides an ultrasonic welding device which comprises an operation table, a driving mechanism, an ultrasonic generator and an anti-adhesion mechanism, the driving mechanism is fixed at the bottom of a rack, the ultrasonic generator is fixedly connected with the driving mechanism, the anti-adhesion mechanism comprises a fixed base, a moving base and a pressing ring, the fixed base is fixedly connected with the end of the driving mechanism, one end of the moving base is vertically and slidingly installed on the fixed base, a U-shaped cover is arranged outside the ultrasonic generator, the pressing ring is fixed at the bottom of the U-shaped cover, when the ultrasonic generator moves downwards, the pressing ring at the bottom of the U-shaped cover first contacts the surface of the paperboard, the surface of the paperboard is fixed, and the surrounding of the welding point is assisted to radiate heat, after the welding is completed, the ultrasonic generator and the U-shaped cover move upwards, the ultrasonic generator first separates from the welding point, and the U-shaped cover is continuously pressed on the surrounding of the welding point by the compression spring, so that the adhesion phenomenon between the welding point and the ultrasonic generator is effectively prevented.

Description

Technical Field

[0001] This invention relates to the field of ultrasonic welding technology, and more particularly to an ultrasonic welding apparatus. Background Technology

[0002] Ultrasonic welding utilizes high-frequency vibrations transmitted to the surfaces of two objects to be welded. Under pressure, the surfaces rub against each other, causing fusion between molecular layers. When ultrasound acts on the contact surfaces of thermoplastic plastics, it generates tens of thousands of high-frequency vibrations per second. This high-frequency vibration, reaching a certain amplitude, transmits ultrasonic energy to the welding area through the upper welding component. Due to the high acoustic impedance at the welding area—the interface between the two materials—localized high temperatures are generated. Furthermore, because plastics have poor thermal conductivity, the heat cannot dissipate quickly and accumulates in the welding area, causing the contact surfaces of the two plastics to melt rapidly. With the application of pressure, they fuse together. After the ultrasound stops, the pressure is maintained for a few seconds to allow solidification, thus forming a strong molecular chain, achieving the welding purpose. The weld strength can approach the strength of the original materials.

[0003] The ultrasonic automatic welding production line for paper covers, disclosed in patent document CN112894119A, includes a support frame and a first conveyor line mounted on its upper end, a paper cover feeding device, a pressing device, and a rejection device. The paper cover feeding device, pressing device, rejection device, and the first conveyor line are all signal-connected to a controller. In this invention, the controller is equipped with a PLC. The PLC controls the paper cover feeding device to transport the paper cover to the first conveyor line. The PLC also controls the paper cover feeding device to assemble the paper cover into the paper cover on the first conveyor line. Then, the pressing device presses the paper cover and the paper cover together into a single structure. The rejection device identifies defective products and removes defective finished products from the first conveyor line. The paper cover production process is automated. However, this patent still has some shortcomings: during ultrasonic welding, heat accumulation at the welding point can easily cause the object to be welded to adhere to the welding head or area outside the welding point, affecting the ultrasonic welding effect. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: in order to solve the problem that heat accumulation at the welding point can easily cause the object to be welded to stick to the welding head or outside the welding point, the present invention provides an ultrasonic welding device to solve the above problem.

[0005] The technical solution adopted by the present invention to solve its technical problem is: an ultrasonic welding device, including an operating table, a frame fixed on the operating table, a driving mechanism, an ultrasonic generator, and an anti-adhesion mechanism. The driving mechanism is fixed to the bottom of the frame, and the ultrasonic generator is fixedly connected to the driving mechanism. The driving mechanism is used to drive the ultrasonic generator to move toward the welding point. The anti-adhesion mechanism includes a fixed seat, a movable seat, and a pressure ring. The fixed seat is fixedly connected to the end of the driving mechanism. One end of the movable seat is vertically slidably mounted on the fixed seat. The other end of the movable seat is fixed with a U-shaped sleeve with an opening facing downwards. The U-shaped sleeve covers the outside of the ultrasonic generator, and the pressure ring is fixed to the bottom of the U-shaped sleeve.

[0006] Preferably, the top of the fixed base and the upper surface of the movable base are fixedly connected by a compression spring, and heat dissipation fins are also fixed on the surfaces of the movable base and the U-shaped sleeve. The depth of the U-shaped sleeve is greater than the thickness of the ultrasonic generator.

[0007] Preferably, a feeding mechanism is also fixed on the operating table. The feeding mechanism includes a material box, a paper pusher, and a paper pusher cylinder. The material box is fixed on the operating table for storing cardboard. The paper pusher is slidably installed on the surface of the operating table. A discharge port is provided on the bottom of the material box near the ultrasonic generator. The paper pusher cylinder is fixed on the operating table and can drive the paper pusher into or out of the discharge port. The paper pusher is used to push the cardboard in the material box from the discharge port to below the ultrasonic generator.

[0008] Preferably, the paper pusher is a U-shaped frame, with the front opening of the paper pusher facing the ultrasonic generator, and a material-pulling rod fixed at the rear end of the paper pusher, one side of which extends to the rear end and forms a slope.

[0009] Preferably, a flap is rotatably installed on the upper edge of the discharge port. The flap is connected to the side wall of the material box by a torsion spring. The upper end of the flap is bent inward to form a clamping head. A through hole is provided on the side of the material box to accommodate the clamping head. The clamping head can be inserted into the through hole and enter the material box. The clamping head can abut against the bottom edge of one side of the cardboard inside the material box.

[0010] Preferably, the bottom of the material box is also provided with a clearance groove for accommodating the material feeding rod.

[0011] Preferably, baffles are fixed on both sides of the paper pusher, and a column head is fixed on the outer side of the baffle near the front end of the paper pusher. A spring is horizontally fixed on the column head, and a push block higher than the baffle is fixed to the end of the spring. A lever is fixed to the lower end of the flip plate. When the paper pusher moves into the material box, the push block can push the lever to move and drive the flip plate to deflect. When the paper pusher moves out of the material box, the push block cannot push the lever to move and can be squeezed to the bottom of the lever by the lever.

[0012] Preferably, the driving mechanism includes a horizontal positioning cylinder and a downward pressing cylinder. The horizontal positioning cylinder is fixed to the bottom of the frame, and a positioning plate is fixed to the front end of the horizontal positioning cylinder. The downward pressing cylinder is vertically fixed to the positioning plate, and the piston rod end of the downward pressing cylinder is set downward and fixed to a mounting plate. The ultrasonic generator and the mounting base are both fixed to the mounting plate.

[0013] The beneficial effects of this invention are as follows: An anti-adhesion mechanism is provided. When the ultrasonic generator moves downwards, the pressure ring at the bottom of the U-shaped sleeve first contacts the cardboard surface to fix it in place. Then, the ultrasonic generator continues to press down for ultrasonic welding. During welding, areas outside the welding point may also be affected by the ultrasonic waves, causing them to heat up. At this time, the pressure ring assists in rapid heat dissipation around the welding point, reducing the impact of the ultrasonic waves on the area around the welding point. As the ultrasonic generator and U-shaped sleeve move upwards, the ultrasonic generator first detaches from the welding point, while the U-shaped sleeve is kept pressed tightly around the welding point by the compression spring, effectively preventing adhesion between the welding point and the ultrasonic generator. When the ultrasonic generator continues to move upwards until the U-shaped sleeve detaches from the cardboard, the compression spring allows the U-shaped sleeve to adhere tightly to the ultrasonic generator. The U-shaped sleeve absorbs the accumulated heat on the ultrasonic generator, which is then dissipated through the heat dissipation fins, preventing the ultrasonic generator from overheating due to prolonged operation and affecting subsequent welding results. Attached Figure Description

[0014] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the preferred embodiment of an ultrasonic welding device according to the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of the mounting plate of an ultrasonic welding device according to the present invention;

[0017] Figure 3 This is a schematic diagram of the pressure ring structure of an ultrasonic welding device according to the present invention;

[0018] Figure 4 This is a schematic diagram of the material box of an ultrasonic welding device according to the present invention;

[0019] Figure 5 This is a schematic diagram of the structure of the paper-pushing cylinder of an ultrasonic welding device according to the present invention;

[0020] Figure 6 This is a schematic diagram of the material feeding rod of an ultrasonic welding device according to the present invention;

[0021] Figure 7 yes Figure 6 Enlarged view of point A in the middle.

[0022] Reference numerals: 1. Operating table; 2. Frame; 3. Drive mechanism; 4. Ultrasonic generator; 5. Anti-adhesion mechanism; 6. Fixed seat; 7. Moving seat; 8. Pressure ring; 9. U-shaped sleeve; 10. Heat dissipation fins; 11. Feeding mechanism; 12. Material box; 13. Paper pusher; 14. Paper pusher cylinder; 15. Paperboard; 16. Feeding rod; 17. Flip plate; 18. Clamping head; 19. Clearance groove; 20. Baffle; 21. Column head; 22. Spring piece; 23. Push block; 24. Lever; 25. Horizontal positioning cylinder; 26. Downward pressing cylinder; 27. Positioning plate; 28. Mounting plate. Detailed Implementation

[0023] 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 embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] The concepts involved in this application will first be described with reference to the accompanying drawings. It should be noted that the following descriptions of various concepts are only for the purpose of making the content of this application easier to understand and do not constitute a limitation on the scope of protection of this application; furthermore, the embodiments and features in the embodiments of this application can be combined with each other unless otherwise specified. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] like Figures 1 to 7As shown, the present invention provides an embodiment of an ultrasonic welding device, including an operating table 1, a frame 2 fixed on the operating table 1, a driving mechanism 3, an ultrasonic generator 4, and an anti-adhesion mechanism 5. The driving mechanism 3 is fixed to the bottom of the frame 2, the ultrasonic generator 4 is fixedly connected to the driving mechanism 3, and the driving mechanism 3 is used to drive the ultrasonic generator 4 to move toward the welding point. The anti-adhesion mechanism 5 includes a fixed seat 6, a movable seat 7, and a pressure ring 8. The fixed seat 6 is fixedly connected to the end of the driving mechanism 3. One end of the movable seat 7 is vertically slidably mounted on the fixed seat 6, and the other end of the movable seat 7 is fixed with a U-shaped sleeve 9 with an opening facing downwards. The U-shaped sleeve 9 covers the outside of the ultrasonic generator 4, and the pressure ring 8 is fixed to the bottom of the U-shaped sleeve 9.

[0026] The top of the fixed seat 6 and the upper surface of the movable seat 7 are fixedly connected by a compression spring. The movable seat 7 and the surface of the U-shaped sleeve 9 are also fixed with heat dissipation fins 10. The depth of the U-shaped sleeve 9 is greater than the thickness of the ultrasonic generator 4.

[0027] The drive mechanism 3 includes a horizontal positioning cylinder 25 and a downward pressing cylinder 26. The horizontal positioning cylinder 25 is fixed to the bottom of the frame 2. A positioning plate 27 is fixed to the front end of the horizontal positioning cylinder 25. The downward pressing cylinder 26 is vertically fixed on the positioning plate 27. The piston rod end of the downward pressing cylinder 26 is set downward and fixed with a mounting plate 28. The ultrasonic generator 4 and the fixed seat 6 are both fixed on the mounting plate 28.

[0028] During ultrasonic welding, the ultrasonic generator 4 is first moved to a position directly above the welding point using the horizontal positioning cylinder 25. Then, the ultrasonic generator 4 is pressed down to the welding point of the cardboard 15 using the downward pressing cylinder 26. As the ultrasonic generator 4 moves downward, the pressure ring 8 at the bottom of the U-shaped sleeve 9 first contacts the surface of the cardboard 15 to fix it. Then, the ultrasonic generator 4 continues to press down to perform ultrasonic welding. During the welding process, areas outside the welding point may also be affected by the ultrasonic waves, causing them to heat up. At this time, the pressure ring 8 helps to quickly dissipate heat around the welding point, reducing the impact of the ultrasonic waves on the area around the welding point.

[0029] After welding is completed, the lower cylinder 26 resets, causing the ultrasonic generator 4 and the U-shaped sleeve 9 to move upward. During the upward movement, the ultrasonic generator 4 first separates from the welding point, while the U-shaped sleeve 9 is pressed tightly around the welding point by the compression spring, effectively preventing the welding point from sticking to the ultrasonic generator 4. When the ultrasonic generator 4 continues to move upward until the U-shaped sleeve 9 separates from the cardboard 15, the compression spring can make the U-shaped sleeve 9 stick tightly to the ultrasonic generator 4. The heat accumulated on the ultrasonic generator 4 is absorbed by the U-shaped sleeve 9 and then dissipated through the heat dissipation fins 10, avoiding the surface heat rise of the ultrasonic generator 4 due to long-term operation, which would affect the subsequent welding effect.

[0030] The operating table 1 is also fixed with a feeding mechanism 11, which includes a material box 12, a paper pusher 13 and a paper pusher cylinder 14. The material box 12 is fixed on the operating table 1 for storing paperboard 15. The paper pusher 13 is slidably installed on the surface of the operating table 1. The bottom of the material box 12 is provided with a discharge port on the side close to the ultrasonic generator 4. The paper pusher cylinder 14 is fixed on the operating table 1. The paper pusher cylinder 14 can drive the paper pusher 13 to enter or exit the discharge port. The paper pusher 13 is used to push the paperboard 15 in the material box 12 from the discharge port to below the ultrasonic generator 4.

[0031] The paper pusher 13 is a U-shaped frame. The front opening of the paper pusher 13 faces the ultrasonic generator 4. The rear end of the paper pusher 13 is fixed with a material-pushing rod 16. One side of the material-pushing rod 16 extends to the rear end and forms a slope. When the material-pushing rod 16 enters the material box 12, the slope on the material-pushing rod 16 can smoothly insert into the bottom of the cardboard 15 and lift the cardboard 15 upward, so that the entire paper pusher 13 can enter under the cardboard 15 in the material box 12. When the paper pusher 13 moves into place, the bottom cardboard 15 can fall to the center of the paper pusher 13. The bottom of the material box 12 is also provided with a relief groove 19 for accommodating the material-pushing rod 16. When the material-pushing rod 16 enters the relief groove 19, it can prevent the edge of the cardboard 15 from overlapping the material-pushing rod 16, so that the edge of the cardboard 15 can fall smoothly in front of the material-pushing rod 16, so that the material-pushing rod 16 can push the cardboard 15 forward when it moves forward.

[0032] A flap 17 is rotatably installed on the upper edge of the discharge port. The flap 17 is connected to the side wall of the material box 12 by a torsion spring. The upper end of the flap 17 is bent inward to form a clip 18. A through hole for accommodating the clip 18 is provided on the side of the material box 12. The clip 18 can be inserted into the through hole and enter the material box 12. The clip 18 can abut against the bottom edge of one side of the cardboard 15 inside the material box 12.

[0033] Baffles 20 are fixed on both sides of the paper pusher 13 to guide the falling paperboard 15 so that the paperboard 15 can fall smoothly into the center of the paper pusher 13. A column head 21 is fixed on the outer side of the baffle 20 near the front end of the paper pusher 13. A spring piece 22 is horizontally fixed on the column head 21. A push block 23 higher than the baffle 20 is fixed to the end of the spring piece 22. A lever 24 is fixed to the lower end of the flip plate 17. When the paper pusher 13 moves into the material box 12, the push block 23 can push the lever 24 to move and drive the flip plate 17 to deflect. When the paper pusher 13 moves out of the material box 12, the push block 23 cannot push the lever 24 to move and can be squeezed to the bottom of the lever 24 by the lever 24.

[0034] Cardboard 15 is stacked at an angle in the material box 12. Push block 23 first pushes lever 24, causing flip plate 17 to deflect. At this time, the clamp 18 at the top of flip plate 17 disengages from the edge of the bottom cardboard 15 and slides to abut against the bottom edge of the next layer of cardboard 15. Then push block 23 disengages from lever 24, and flip plate 17 is reset by the force provided by torsion spring, so that clamp 18 abuts against the bottom of the new cardboard 15. Therefore, when pusher 13 enters material box 12 each time, only the bottom cardboard 15 falls, while the remaining cardboard 15 is limited by clamp 18 and cannot fall completely. This allows pusher 13 to push only one cardboard 15 from the outlet to the bottom of ultrasonic generator 4 for welding at a time, thus realizing the feeding action of cardboard 15. After welding, the subsequent pushed cardboard 15 can push the welded cardboard 15 away from ultrasonic generator 4.

[0035] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. The above are only preferred embodiments of this application. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this application.

Claims

1. An ultrasonic welding apparatus, comprising an operating table (1), wherein a frame (2) is fixed on the operating table (1), characterized in that: It also includes a drive mechanism (3), an ultrasonic generator (4), and an anti-adhesion mechanism (5). The drive mechanism (3) is fixed to the bottom of the frame (2). The ultrasonic generator (4) is fixedly connected to the drive mechanism (3). The drive mechanism (3) is used to drive the ultrasonic generator (4) to move toward the welding point. The anti-adhesion mechanism (5) includes a fixed seat (6), a movable seat (7), and a pressure ring (8). The fixed seat (6) is fixedly connected to the end of the drive mechanism (3). One end of the movable seat (7) is vertically slidably mounted on the fixed seat (6). The other end of the movable seat (7) is fixed with a U-shaped sleeve (9) with its opening facing downward. The U-shaped sleeve (9) covers the outside of the ultrasonic generator (4). The pressure ring (8) is fixed to the bottom of the U-shaped sleeve (9). The top of the fixed seat (6) and the upper surface of the movable seat (7) are fixedly connected by a compression spring. The surfaces of the movable seat (7) and the U-shaped sleeve (9) are also fixed with heat dissipation fins (10). The depth of the U-shaped sleeve (9) is greater than the thickness of the ultrasonic generator (4).

2. The ultrasonic welding apparatus as described in claim 1, characterized in that: The operating table (1) is also fixed with a feeding mechanism (11), which includes a material box (12), a paper pusher (13) and a paper pusher cylinder (14). The material box (12) is fixed on the operating table (1) for storing cardboard (15). The paper pusher (13) is slidably installed on the surface of the operating table (1). The bottom of the material box (12) is provided with a discharge port on the side close to the ultrasonic generator (4). The paper pusher cylinder (14) is fixed on the operating table (1). The paper pusher cylinder (14) can drive the paper pusher (13) to enter or exit the discharge port. The paper pusher (13) is used to push the cardboard (15) in the material box (12) from the discharge port to below the ultrasonic generator (4).

3. The ultrasonic welding apparatus as described in claim 2, characterized in that: The paper pusher (13) is a U-shaped frame. The front opening of the paper pusher (13) is set towards the ultrasonic generator (4). The rear end of the paper pusher (13) is fixed with a material pusher (16). One side of the material pusher (16) extends to the rear end and forms a slope.

4. The ultrasonic welding apparatus as described in claim 2, characterized in that: A flap (17) is rotatably installed on the upper edge of the discharge port. The flap (17) is connected to the side wall of the material box (12) by a torsion spring. The upper end of the flap (17) is bent toward the inside of the material box (12) to form a clip (18). The side of the material box (12) is provided with a through hole for accommodating the clip (18). The clip (18) can be inserted into the through hole and enter the material box (12). The clip (18) can abut against the bottom edge of one side of the cardboard (15) inside the material box (12).

5. The ultrasonic welding apparatus as described in claim 3, characterized in that: The bottom of the material box (12) is also provided with a clearance groove (19) for accommodating the material feeding rod (16).

6. The ultrasonic welding apparatus as described in claim 4, characterized in that: The paper pusher (13) is fixed with baffles (20) on both sides. A column head (21) is fixed on the outer side of the baffle (20) near the front end of the paper pusher (13). A spring piece (22) is fixed horizontally on the column head (21). A push block (23) higher than the baffle (20) is fixed at the end of the spring piece (22). A lever (24) is fixed at the lower end of the flip plate (17). When the paper pusher (13) moves into the material box (12), the push block (23) can push the lever (24) to move and drive the flip plate (17) to deflect. When the paper pusher (13) moves out of the material box (12), the push block (23) cannot push the lever (24) to move and can be squeezed to the bottom of the lever (24) by the lever (24).

7. The ultrasonic welding apparatus as described in claim 1, characterized in that: The drive mechanism (3) includes a horizontal positioning cylinder (25) and a downward pressing cylinder (26). The horizontal positioning cylinder (25) is fixed to the bottom of the frame (2). A positioning plate (27) is fixed to the front end of the horizontal positioning cylinder (25). The downward pressing cylinder (26) is vertically fixed on the positioning plate (27). The piston rod end of the downward pressing cylinder (26) is set downward and fixed with a mounting plate (28). The ultrasonic generator (4) and the fixed seat (6) are both fixed on the mounting plate (28).

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