Heat sealing edge structure for air bubble film bag making

Abstract

The utility model discloses an air bubble film bag heat sealing structure which comprises a bag making machine and a heat sealing plate, the heat sealing plate is installed on the top of the bag making machine, stress relieving assemblies used for relieving internal stress of an air bubble film are symmetrically installed in the bag making machine, one end of each stress relieving assembly extends to the outside of the heat sealing plate, and the other end of each stress relieving assembly extends to the outside of the heat sealing plate. According to the utility model, through the cooperation of the stress relieving assembly and the ultrasonic vibration assemblies, the phenomena of wrinkling and deformation of the air bubble film caused by stress concentration during heat sealing are fundamentally eliminated, pressure is accurately applied to the air bubble film, and the air bubble film is prevented from being damaged. When the air bubble film is heated and pressed, the stress accumulated in the air bubble film is released, so that the air bubble film can be uniformly heated and pressed in the heat sealing process, the heat and the pressure of the heat sealing plate can be effectively transferred, the flatness, smoothness and firmness of a heat sealing edge are realized, and the heat sealing efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of heat-sealing edge structure for bubble wrap bag making, specifically a heat-sealing edge structure for bubble wrap bag making. Background Technology

[0002] In the packaging industry, bubble wrap bag making machines are key equipment for producing various cushioning packaging products. With the booming development of e-commerce, logistics and manufacturing, the demand for bubble wrap packaging bags continues to rise, which has prompted continuous innovation in bubble wrap bag making technology.

[0003] Chinese Patent No. CN220864905U discloses a heat-sealing structure for a bubble wrap bag-making machine. The structure includes a machine body and a first vertical plate. A first roller is rotatably connected between adjacent first vertical plates. Connecting devices are installed at both ends of the upper part of the machine body, and a heat-sealing device is installed on the inner upper side of the connecting devices. The bubble wrap to be heat-sealed passes through the second rollers on both sides, with one end connected to the outer winding structure. Then, rotating the first handle drives the first screw to rotate. The first screw, in conjunction with a first concave plate, moves the second concave plate, which in turn moves the third roller. Adjusting the distance between the third and second rollers supports and tensions the bubble wrap, preventing wrinkles during movement and improving the quality of the heat-sealed product.

[0004] The aforementioned patent also has some shortcomings. It does not take into account the internal stress accumulated in the bubble wrap during production, transportation and pre-processing. During heat sealing, these stresses may cause wrinkles and deformation of the bubble wrap, affecting the heat sealing quality and the overall performance of the packaging bag. Therefore, we need to propose a heat sealing edge structure for bubble wrap bag making. Utility Model Content

[0005] The purpose of this invention is to provide a heat-sealing structure for bubble wrap bag making to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a heat-sealing structure for bubble wrap bag making, comprising the heat-sealing plate installed on the top of a bag making machine;

[0007] The bag making machine is symmetrically equipped with stress relief components for eliminating internal stress in the bubble film, and one end of each stress relief component extends to the outside of the heat sealing plate.

[0008] The bag making machine is symmetrically equipped with ultrasonic vibration components to assist the stress relief components.

[0009] The bag-making machine is equipped with a tensioning assembly for tensioning the bubble wrap.

[0010] Preferably, the stress relief assembly includes a pusher plate, a micro gear pump, a hydraulic cylinder, and a micro elastic pin. The interior of the heat-sealing plate is hollow, and the pusher plate is disposed inside the heat-sealing plate. The top end of the pusher plate is fixedly connected to the output end of the hydraulic cylinder.

[0011] Preferably, the micro gear pump is connected to the hydraulic cylinder via a high-pressure oil pipe, the bottom end of the push plate is connected to the top of the micro elastic pin, one end of the micro elastic pin extends to the outside of the heat-sealing plate, and a guide hole is provided on the heat-sealing plate at the position corresponding to the micro elastic pin, the inner diameter of the guide hole being adapted to the outer diameter of the micro elastic pin.

[0012] Preferably, the ultrasonic vibration assembly includes an ultrasonic generator, a transducer, and an amplitude transformer. The ultrasonic generator is installed on the inner wall of the bag making machine. The side of the ultrasonic generator near the heat sealing plate is connected to the transducer. The end of the transducer away from the ultrasonic generator is connected to the amplitude transformer via a thread. The other end of the amplitude transformer is connected to one side of the heat sealing plate.

[0013] Preferably, the tensioning assembly includes a servo motor, an electric push rod, a fixed block, a driving roller, and a driven roller. A groove is formed on one inner wall of the bag making machine, and a ball groove is formed on the other inner wall of the bag making machine. The servo motor is mounted on the outside of the bag making machine through the fixed block. The electric push rod is mounted in the groove. The output shaft of the servo motor is connected to the input shaft of the electric push rod. The driving roller is mounted inside the bag making machine.

[0014] Preferably, a connecting block is installed on the electric push rod, a connecting column is installed on the surface of the connecting block, one end of the connecting column away from the connecting block is connected to one end of the driven roller, the other end of the driven roller is connected to a rolling ball, the rolling ball is adapted to the ball groove, and the driving roller is fixedly clamped to the inner walls of both sides of the bag making machine.

[0015] Preferably, the top of the bag making machine is provided with a square groove, an electric slide is installed inside the square groove, a circular column is slidably connected to the surface of the electric slide, the end of the circular column away from the electric slide is connected to the top of the heat sealing plate, a strain gauge pressure sensor and a temperature sensor are installed on the top of the push plate, and a controller is installed on the top of the bag making machine, the controller being electrically connected to the strain gauge pressure sensor and the temperature sensor respectively.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This invention fundamentally eliminates the wrinkling and deformation of bubble film caused by stress concentration during heat sealing by combining a stress relief component and an ultrasonic vibration component. It precisely applies pressure to the bubble film, releasing the stress accumulated inside, so that the bubble film can be heated and compressed evenly during the heat sealing process. The heat and pressure of the heat sealing plate are effectively transferred, thereby achieving a flat, smooth and firm heat-sealed edge and improving heat sealing efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the internal cross-sectional structure of the bag-making machine of this utility model;

[0020] Figure 3 This is a schematic diagram of the heat-sealing plate structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the stress relief component structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the internal cross-sectional structure of the heat-sealing plate of this utility model.

[0023] In the diagram: 1. Bag making machine; 2. Heat sealing plate; 3. Push plate; 4. Miniature gear pump; 5. Hydraulic cylinder; 6. Miniature elastic ejector pin; 7. Ultrasonic generator; 8. Transducer; 9. Amplitude bar; 10. Servo motor; 11. Electric push rod; 12. Fixed block; 13. Driving roller; 14. Driven roller; 15. Groove; 16. Ball groove; 17. Connecting column; 18. Connecting block; 19. Rolling ball; 20. Square groove; 21. Electric slide table; 22. Circular column; 23. Strain gauge pressure sensor; 24. Temperature sensor; 25. Controller. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-5 This utility model provides a technical solution: a heat-sealing structure for bubble wrap bag making, including a bag making machine 1 and a heat-sealing plate 2. The heat-sealing plate 2 is installed on the top of the bag making machine 1. The bag making machine 1 is a bubble wrap bag making machine mainly used to make bubble wrap into packaging bags of various specifications. The heat-sealing plate 2 can perform heat sealing operation on the bubble wrap, so that the bubble wrap forms the seal of the bag.

[0026] The bag making machine 1 is symmetrically equipped with stress relief components for eliminating internal stress of the bubble film. One end of each stress relief component extends to the outside of the heat sealing plate 2. The stress relief components include a push plate 3, a micro gear pump 4, a hydraulic cylinder 5, and a micro elastic pin 6. The interior of the heat sealing plate 2 is hollow. The push plate 3 is located inside the heat sealing plate 2. The micro gear pump 4 provides a power source for the hydraulic cylinder 5 and delivers high-pressure oil to the hydraulic cylinder 5 through a high-pressure oil pipe to control the movement of the hydraulic cylinder 5. The hydraulic cylinder 5 converts hydraulic energy into mechanical energy to push the push plate 3 to move. The top end of the push plate 3 is fixedly connected to the output end of the hydraulic cylinder 5. The micro gear pump 4 is connected to the hydraulic cylinder 5 through a high-pressure oil pipe.

[0027] The bottom end of the push plate 3 is connected to the top of the micro elastic pin 6. One end of the micro elastic pin 6 extends to the outside of the heat-sealing plate 2. The push plate 3 is set inside the heat-sealing plate 2, and its top end is fixedly connected to the output end of the hydraulic cylinder 5. When the hydraulic cylinder 5 works, the output thrust drives the push plate 3 to move up and down inside the heat-sealing plate 2, thereby driving the micro elastic pin 6 connected to it to move. A guide hole is provided on the heat-sealing plate 2 at the position corresponding to the micro elastic pin 6. The inner diameter of the guide hole is adapted to the outer diameter of the micro elastic pin 6. One end of the micro elastic pin 6 is connected to the bottom end of the push plate 3, and the other end extends to the outside through the guide hole on the heat-sealing plate 2. When the push plate 3 moves downward under the drive of the hydraulic cylinder 5, the micro elastic pin 6 extends downward, contacts the bubble film and applies pressure. When the push plate 3 moves upward, the micro elastic pin 6 retracts into the heat-sealing plate 2. Its elastic design can adapt to bubble films of different thicknesses and materials, ensuring that the applied pressure is uniform and appropriate.

[0028] The bag making machine 1 is symmetrically equipped with ultrasonic vibration components to assist the stress relief component. The ultrasonic vibration component includes an ultrasonic generator 7, a transducer 8, and an amplitude transformer 9. The ultrasonic generator 7 is installed on the inner wall of the bag making machine 1. The ultrasonic generator 7 generates a high-frequency electrical signal to provide the electrical energy required for the operation of the transducer 8. The transducer 8 converts the high-frequency electrical signal generated by the ultrasonic generator 7 into mechanical vibration. The amplitude transformer 9 amplifies the mechanical vibration generated by the transducer 8. According to the principle of transmission and amplification of mechanical vibration, the smaller amplitude vibration output by the transducer 8 is converted into a larger amplitude vibration, which enhances the effect on the bubble film and assists the stress relief component in better eliminating the internal stress of the bubble film. At the same time, it helps the bubble film to fuse during the heat sealing process and improves the heat sealing quality. The side of the ultrasonic generator 7 closest to the heat sealing plate 2 is connected to the transducer 8. The end of the transducer 8 away from the ultrasonic generator 7 is connected to the amplitude transformer 9 through a thread. The other end of the amplitude transformer 9 is connected to one side of the heat sealing plate 2.

[0029] The bag making machine 1 is equipped with a tensioning assembly for tensioning bubble wrap. The tensioning assembly includes a servo motor 10, an electric push rod 11, a fixing block 12, a drive roller 13, and a driven roller 14. The servo motor 10 provides power input to the electric push rod 11 and controls the speed and position of the electric push rod 11. The electric push rod 11 adjusts the position of the driven roller 14, thereby changing the tension of the bubble wrap between the drive roller 13 and the driven roller 14. The fixing block 12 securely mounts the servo motor 10 on the outside of the bag making machine 1 to ensure the stability of the servo motor 10 during operation and to connect the servo motor 10 with the electric push rod 11. A groove 15 is provided on one inner wall of the bag making machine 1.

[0030] A ball groove 16 is provided on the inner wall of the other side of the bag making machine 1. The servo motor 10 is installed on the outside of the bag making machine 1 via a fixing block 12. The electric push rod 11 is installed in a groove 15. The groove 15 is located on one side of the inner wall of the bag making machine 1, and its shape and size are adapted to the electric push rod 11, so that the electric push rod 11 can be tightly installed in the groove 15. The groove wall of the groove 15 plays a positioning and guiding role for the electric push rod 11, ensuring that the electric push rod 11 can only move in a straight line in a preset direction during operation. The output shaft of the servo motor 10 is connected to the input shaft of the electric push rod 11. The drive roller 13 is installed inside the bag making machine 1 and is fixedly clamped to the inner walls on both sides of the bag making machine 1. When the bubble film is placed between the drive roller 13 and the driven roller 14, the rotation of the drive roller 13 drives the bubble film forward. At the same time, it works together with the driven roller 14 to ensure the stability of the bubble film during the conveying process. The electric push rod 11 A connecting block 18 is installed on the upper part of the bag making machine 1. A connecting column 17 is installed on the surface of the connecting block 18. The end of the connecting column 17 away from the connecting block 18 is connected to one end of the driven roller 14. The connecting block 18 connects the electric push rod 11 and the connecting column 17, transmitting the linear motion of the electric push rod 11 to the connecting column 17, thereby driving the driven roller 14 to move. The other end of the driven roller 14 is connected to a rolling ball 19. The rolling ball 19 is adapted to the ball groove 16. The ball groove 16 is opened on the inner wall of the other side of the bag making machine 1. Its arc-shaped groove surface is adapted to the spherical shape of the rolling ball 19. The rolling ball 19 can roll freely in the ball groove 16. When the electric push rod 11 pushes the driven roller 14 to move, the rolling ball 19 rolls in the ball groove 16, providing low-friction support for the movement of the driven roller 14, ensuring that the driven roller 14 can be smoothly adjusted in position, and achieving precise adjustment of the bubble film tension. The driving roller 13 is fixedly clamped on the inner walls of both sides of the bag making machine 1.

[0031] The top of the bag-making machine 1 has a square groove 20, and an electric slide table 21 is installed inside the square groove 20. A circular column 22 is slidably connected to the surface of the electric slide table 21. The end of the circular column 22 away from the electric slide table 21 is connected to the top of the heat-sealing plate 2. The electric slide table 21 is installed in the square groove 20 and drives the circular column 22 and the heat-sealing plate 2 connected to it to move horizontally. The position of the heat-sealing plate 2 can be adjusted according to the bag-making requirements. One end of the circular column 22 is fixedly connected to the slider of the electric slide table 21, and the other end is connected to the top of the heat-sealing plate 2. When the electric slide table 21 is working, the horizontal movement of its slider drives the heat-sealing plate 2 through the circular column 22. The sealing plate 2 moves horizontally to ensure that the heat sealing plate 2 can accurately reach the predetermined position for heat sealing operation. The top of the push plate 3 is equipped with a strain gauge pressure sensor 23 and a temperature sensor 24. The top of the bag making machine 1 is equipped with a controller 25. The controller 25 is electrically connected to the strain gauge pressure sensor 23 and the temperature sensor 24 respectively. The strain gauge pressure sensor 23 is installed on the top of the push plate 3. When the push plate 3 is subjected to the thrust from the hydraulic cylinder 5 or the reaction force when working in conjunction with the micro elastic pin 6, the strain gauge inside the strain gauge pressure sensor 23 will deform, causing its resistance value to change. By measuring the change in resistance, the magnitude of the pressure can be calculated, and the pressure signal is converted into a standard electrical signal and output to the controller 25. The temperature sensor 24 can monitor the temperature of the heat-sealing plate 2 in real time and feed the temperature signal back to the controller 25, so that the control system can accurately control the heating temperature of the heat-sealing plate 2 according to the heat-sealing requirements to ensure the heat-sealing effect. The controller 25, as the control core of the entire equipment, receives the signals fed back by the strain gauge pressure sensor 23 and the temperature sensor 24, and controls the components to work together according to the preset program and parameters to achieve precise control of stress relief, heat sealing, tensioning and other operations in the bubble wrap bag making process.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heat-sealed edge structure for bubble film bag making, comprising a bag making machine (1) and a heat-sealing plate (2), characterized in that: The heat sealing plate (2) is installed on the top of the bag making machine (1); The stress relief assembly for eliminating the internal stress of the bubble film is symmetrically installed in the bag making machine (1), and one end of the stress relief assembly extends to the outside of the heat sealing plate (2); The ultrasonic vibration assembly for assisting the stress relief assembly is symmetrically installed in the bag making machine (1); The tensioning assembly for tensioning the bubble film is installed in the bag making machine (1).

2. The heat seal edge structure for bubble film bag making according to claim 1, characterized in that: The stress relief assembly comprises a push plate (3), a micro gear pump (4), a hydraulic cylinder (5) and a micro elastic ejector pin (6), the inside of the heat sealing plate (2) is hollow, the push plate (3) is arranged in the inside of the heat sealing plate (2), and the top end of the push plate (3) is fixedly connected with the output end of the hydraulic cylinder (5).

3. A heat seal edge structure for bubble film bag making according to claim 2, characterized in that: The micro gear pump (4) is connected with the hydraulic cylinder (5) through a high-pressure oil pipe, the bottom end of the push plate (3) is connected with the top of the micro elastic ejector pin (6), one end of the micro elastic ejector pin (6) extends to the outside of the heat sealing plate (2), a guide hole is arranged on the heat sealing plate (2) corresponding to the position of the micro elastic ejector pin (6), and the inner diameter of the guide hole is matched with the outer diameter of the micro elastic ejector pin (6).

4. A heat seal edge structure for bubble film bag making according to claim 3, characterized in that: The ultrasonic vibration assembly comprises an ultrasonic generator (7), a transducer (8) and an amplitude transformer (9), the ultrasonic generator (7) is installed on the inner wall of the bag making machine (1), one side of the ultrasonic generator (7) close to the heat sealing plate (2) is connected with the transducer (8), one end of the transducer (8) away from the ultrasonic generator (7) is connected with the amplitude transformer (9) through threads, and the other end of the amplitude transformer (9) is connected with one side of the heat sealing plate (2).

5. The heat seal edge structure for bubble film bag making according to claim 1, characterized in that: The tensioning assembly comprises a servo motor (10), an electric push rod (11), a fixed block (12), a driving roller (13) and a driven roller (14), a groove (15) is formed in the inner wall of one side of the bag making machine (1), a ball groove (16) is formed in the inner wall of the other side of the bag making machine (1), the servo motor (10) is installed outside the bag making machine (1) through the fixed block (12), the electric push rod (11) is installed in the groove (15), the output shaft of the servo motor (10) is connected with the input shaft of the electric push rod (11), and the driving roller (13) is installed in the inside of the bag making machine (1).

6. A heat seal edge structure for bubble film bag making according to claim 5, characterized in that: A connecting block (18) is installed on the electric push rod (11), a connecting column (17) is installed on the surface of the connecting block (18), one end of the connecting column (17) away from the connecting block (18) is connected with one end of the driven roller (14), the other end of the driven roller (14) is connected with a rolling ball (19), the rolling ball (19) is matched with the ball groove (16), and the driving roller (13) is fixedly connected on the inner walls of the two sides of the bag making machine (1).

7. The heat seal edge structure for bubble film bag making according to claim 2, characterized in that: The top of the bag making machine (1) is provided with a square groove (20), the inside of the square groove (20) is provided with an electric sliding table (21), the surface of the electric sliding table (21) is slidably connected with a circular column (22), the end, away from the electric sliding table (21), of the circular column (22) is connected with the top of the heat sealing plate (2), the top of the push plate (3) is provided with a strain gauge pressure sensor (23) and a temperature sensor (24), the top of the bag making machine (1) is provided with a controller (25), and the controller (25) is electrically connected with the strain gauge pressure sensor (23) and the temperature sensor (24) respectively.

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