A kraft paper composite bubble wrap tensioning device

Abstract

This utility model discloses a kraft paper composite bubble wrap tensioning device, relating to the field of bubble wrap production technology. It includes a fixed frame with pressure rollers rotatably connected to both ends. An electric push rod is fixedly mounted on the fixed frame, and a tensioning frame is connected to the output end of the electric push rod. A tensioning roller is rotatably connected to the tensioning frame, and side rollers are connected to both sides of the tensioning roller via adjusting components. An arc-shaped plate is connected to the tensioning roller and the side rollers via a buffer mechanism, and a pressure sensor is mounted on the arc-shaped plate. A correction roller is connected to the tensioning frame via a correction mechanism. The pressure sensor of this utility model monitors the film tension distribution in real time and acquires tension data. When the system detects that the tension in the edge area is reduced by more than 25% compared to the center area, it quickly increases the driving torque of the side rollers through a torque compensation mechanism to achieve adaptive tension adjustment, strictly controlling the tension difference within ±5% to ensure uniform and stable film tension.

Description

Technical Field

[0001] This utility model relates to the field of bubble wrap production technology, specifically to a kraft paper composite bubble wrap tensioning device. Background Technology

[0002] In the packaging material manufacturing industry, kraft paper composite bubble wrap is widely used for packaging fragile items such as electronic products, glassware, and ceramics due to its combination of the high strength and good printability of kraft paper and the cushioning and shock absorption properties of bubble wrap. During its production and processing, the tensioning process is a crucial step in ensuring product quality.

[0003] Referring to the existing Chinese patent with publication number CN215248531U, a tensioning device for bubble wrap production is disclosed, including a base plate, two fixed plates, an upper limit wheel, a lower limit wheel, and an adjusting wheel. Both ends of the bottom sides of the base plate are movably connected to traveling wheels, and both ends of the top sides of the base plate are fixedly connected to electric telescopic columns. The top of the electric telescopic column is fixedly connected to one side of the bottom of the fixed plate. A connecting rod is fixedly connected to the top left side of the fixed plate, and the other end of the connecting rod is movably connected to the middle of one end of the pressure roller. Another connecting rod is movably connected to the middle of the other end of the pressure roller.

[0004] The aforementioned tensioning equipment for bubble wrap production uses two motors to adjust the height of the adjusting wheel. The control system dynamically adjusts the bubble wrap's movement distance based on pressure sensed by a pressure sensor, indirectly controlling the bubble wrap's tension and facilitating its winding. However, this equipment still has some drawbacks. For example, due to the significant differences in material properties between kraft paper and bubble wrap (kraft paper has a surface roughness of Ra 0.8-1.6μm, while bubble wrap has a surface friction coefficient of 0.3-0.5), the inherent difference in frictional characteristics makes it difficult to design the equipment's contact surface to accommodate both requirements. In actual production, the composite layer is prone to slippage and misalignment during tensioning and conveying. As the production length increases, the misalignment error accumulates, reaching ±3mm per meter, severely affecting the precision and quality stability of the finished composite bubble wrap and hindering the large-scale production of high-quality packaging materials. Utility Model Content

[0005] The purpose of this invention is to provide a kraft paper composite bubble wrap tensioning device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A kraft paper composite bubble wrap tensioning device includes:

[0008] A fixed frame, with pressure rollers rotatably connected to both ends of the fixed frame;

[0009] An electric push rod is fixedly installed on the fixed frame. The output end of the electric push rod is connected to a tensioning frame. A tensioning roller is rotatably connected to the tensioning frame. Side rollers are connected to both sides of the tensioning roller through an adjustment component. An arc-shaped plate is connected to the tensioning roller and the side rollers through a buffer mechanism. A pressure sensor is installed on the arc-shaped plate.

[0010] The tensioning frame is connected to a correction roller via a correction mechanism.

[0011] Preferably, the adjustment assembly includes a servo motor and a rotating rod. The side roller is rotatably connected to the tensioning frame via the rotating rod. The servo motor is mounted on the tensioning frame, and the output end of the servo motor is connected to the extension end of the rotating rod that passes through the tensioning frame.

[0012] Preferably, a mounting bracket is fixedly installed on the tensioning frame, and a vision sensor is fixedly installed on the mounting bracket.

[0013] Preferably, the buffer mechanism includes a buffer spring and a limiting block, one end of the buffer spring is connected to the tension roller and the side roller, and the other end of the buffer spring is connected to the arc plate.

[0014] Preferably, the limiting block is fixedly connected to both sides of the arc-shaped plate, the tension roller and the side roller are provided with limiting grooves, and the limiting block is slidably connected in the limiting groove.

[0015] Preferably, the correction mechanism includes a servo electric cylinder and two connecting rods. The two connecting rods are fixedly connected to both sides of the correction roller. The tensioning frame has through holes, and the connecting rods pass through the through holes. The servo electric cylinder is fixedly installed on the tensioning frame, and the output end of the servo electric cylinder is connected to one of the connecting rods.

[0016] Preferably, a controller is installed on the mounting bracket, and the controller is electrically connected to the electric push rod, pressure sensor, servo motor, vision sensor and servo electric cylinder respectively.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This utility model uses an electric push rod to drive the tension roller to achieve vertical height adjustment, thereby dynamically adjusting the tension of the kraft paper composite bubble film. The pressure sensor monitors the tension distribution of the film material in real time and obtains high-precision tension data. When the system detects that the tension in the edge area is reduced by more than 25% compared with the center area, the intelligent adjustment component responds immediately and quickly increases the driving torque of the side roller through the torque compensation mechanism to achieve adaptive tension adjustment. The tension difference is strictly controlled within a high-precision range of ±5%, ensuring uniform and stable film tension.

[0019] 2. This utility model uses a visual sensor to monitor the edge position and running trajectory of the kraft paper composite bubble film in real time. Once the deviation exceeds the preset threshold, the correction mechanism precisely controls the correction roller to make lateral displacement or angle fine adjustment. Through the dynamic compensation mechanism, the running path of the film material is corrected, realizing real-time correction with micron-level precision, effectively ensuring the flat conveying and processing quality of the composite film material. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a kraft paper composite bubble wrap tensioning device according to an embodiment of this application;

[0021] Figure 2 This is a cross-sectional view of a kraft paper composite bubble wrap tensioning device according to an embodiment of this application;

[0022] Figure 3 This is a schematic cross-sectional view of the correction roller structure of a kraft paper composite bubble film tensioning device in an embodiment of this application;

[0023] Figure 4 This is a schematic cross-sectional view of the limiting groove structure of a kraft paper composite bubble film tensioning device in an embodiment of this application;

[0024] Figure 5 This is a cross-sectional view of the tensioning roller of a kraft paper composite bubble film tensioning device according to an embodiment of this application.

[0025] In the diagram: 1. Fixed frame; 2. Pressure roller; 3. Electric push rod; 4. Tensioning frame; 5. Tensioning roller; 6. Side roller; 7. Curved plate; 8. Pressure sensor; 9. Correcting roller; 10. Servo motor; 11. Rotating rod; 12. Mounting frame; 13. Vision sensor; 14. Buffer spring; 15. Limit block; 16. Limit groove; 17. Servo electric cylinder; 18. Connecting rod; 19. Through hole; 20. Controller. Detailed Implementation

[0026] 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.

[0027] Please see Figures 1-5 This utility model provides a technical solution:

[0028] A kraft paper composite bubble wrap tensioning device includes:

[0029] Fixed frame 1, with pressure rollers 2 rotatably connected to both ends of fixed frame 1;

[0030] An electric push rod 3 is fixedly installed on the fixed frame 1. The output end of the electric push rod 3 is connected to the tension frame 4. A tension roller 5 is rotatably connected to the tension frame 4. Side rollers 6 are connected to both sides of the tension roller 5 through an adjustment assembly. The adjustment assembly includes a servo motor 10 and a rotating rod 11. The side rollers 6 are rotatably connected to the tension frame 4 through the rotating rod 11. The servo motor 10 is installed on the tension frame 4, and the output end of the servo motor 10 is connected to the extension end of the rotating rod 11 that passes through the tension frame 4.

[0031] The operator places the kraft paper composite bubble wrap between the pressure rollers 2 at both ends of the fixed frame 1 and sets the initial tension parameters through the controller 20. After starting the equipment, the controller 20 sends a command to the electric push rod 3, which pushes the tension frame 4 to rise and fall vertically, thereby adjusting the tension roller 5 to the preset height and applying initial tension force to the bubble wrap.

[0032] An arc-shaped plate 7 is connected to the tension roller 5 and the side roller 6 via a buffer mechanism. The buffer mechanism includes a buffer spring 14 and a limiting block 15. One end of the buffer spring 14 is connected to the tension roller 5 and the side roller 6, and the other end of the buffer spring 14 is connected to the arc-shaped plate 7. The limiting block 15 is fixedly connected to both sides of the arc-shaped plate 7. The tension roller 5 and the side roller 6 are provided with limiting grooves 16. The limiting block 15 is slidably connected in the limiting grooves 16. A pressure sensor 8 is installed on the arc-shaped plate 7.

[0033] When the bubble wrap is running on the tension roller 5 and the side roller 6, the pressure sensor 8 collects the pressure data between the arc plate 7 and the tension roller 5 and the side roller 6 in real time, converts it into a tension value and transmits it to the controller 20. When the controller 20 analyzes and finds an abnormal tension, such as insufficient overall tension or uneven distribution, it will adjust the electric push rod 3 to further raise and lower the tension roller 5. If the edge tension is 25% lower than the center area, the controller 20 immediately sends a signal to the servo motor 10 of the adjustment component. The servo motor 10 drives the rotating rod 11 to rotate, adjust the angle and pressure of the side roller 6, increase the torque in the edge area, and control the tension difference within ±5%.

[0034] A mounting bracket 12 is fixedly installed on the tensioning frame 4, and a vision sensor 13 is fixedly installed on the mounting bracket 12. A correction roller 9 is connected to the tensioning frame 4 through a correction mechanism. The correction mechanism includes a servo electric cylinder 17 and two connecting rods 18. The two connecting rods 18 are fixedly connected to both sides of the correction roller 9. A through hole 19 is opened on the tensioning frame 4, and the connecting rod 18 passes through the through hole 19. The servo electric cylinder 17 is fixedly installed on the tensioning frame 4, and the output end of the servo electric cylinder 17 is connected to one of the connecting rods 18. A silicone layer is provided on the outer side of the correction roller 9.

[0035] The vision sensor 13 on the mounting bracket 12 continuously scans the edge position of the bubble wrap, capturing images at a frequency of thousands of frames per second and transmitting them to the controller 20. The controller 20 compares the preset reference position with the built-in algorithm. When it detects that the bubble wrap offset exceeds the threshold (such as ±0.5mm), it immediately sends a command to the servo cylinder 17 of the correction mechanism. The servo cylinder 17 pushes the connecting rod 18, which drives the correction roller 9 to move laterally. By using the friction between the outer silicone layer and the bubble wrap, the running trajectory of the bubble wrap is corrected in real time.

[0036] In the above embodiment, a controller 20 is installed on the mounting bracket 1. The controller 20 is electrically connected to the electric push rod 3, the pressure sensor 8, the servo motor 10, the vision sensor 13, and the servo electric cylinder 17.

[0037] 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 kraft paper composite bubble wrap tensioning device, characterized in that, include: A fixed frame (1) is provided, with pressure rollers (2) rotatably connected to both ends of the fixed frame (1); An electric push rod (3) is fixedly installed on the fixed frame (1). The output end of the electric push rod (3) is connected to a tensioning frame (4). A tensioning roller (5) is rotatably connected to the tensioning frame (4). Side rollers (6) are connected to both sides of the tensioning roller (5) through an adjustment component. An arc plate (7) is connected to the tensioning roller (5) and the side rollers (6) through a buffer mechanism. A pressure sensor (8) is installed on the arc plate (7). The tensioning frame (4) is connected to a correction roller (9) via a correction mechanism.

2. The kraft paper composite bubble wrap tensioning device according to claim 1, characterized in that: The adjustment assembly includes a servo motor (10) and a rotating rod (11). The side roller (6) is rotatably connected to the tension frame (4) via the rotating rod (11). The servo motor (10) is mounted on the tension frame (4), and the output end of the servo motor (10) is connected to the extension end of the rotating rod (11) that passes through the tension frame (4).

3. The kraft paper composite bubble wrap tensioning device according to claim 2, characterized in that: A mounting bracket (12) is fixedly installed on the tensioning frame (4), and a vision sensor (13) is fixedly installed on the mounting bracket (12).

4. The kraft paper composite bubble wrap tensioning device according to claim 1, characterized in that: The buffer mechanism includes a buffer spring (14) and a limiting block (15). One end of the buffer spring (14) is connected to the tension roller (5) and the side roller (6), and the other end of the buffer spring (14) is connected to the arc plate (7).

5. The kraft paper composite bubble wrap tensioning device according to claim 4, characterized in that: The limiting block (15) is fixedly connected to both sides of the arc plate (7), and the tension roller (5) and the side roller (6) are provided with limiting grooves (16), and the limiting block (15) is slidably connected in the limiting grooves (16).

6. The kraft paper composite bubble wrap tensioning device according to claim 3, characterized in that: The correction mechanism includes a servo electric cylinder (17) and two connecting rods (18). The two connecting rods (18) are fixedly connected to both sides of the correction roller (9). The tensioning frame (4) has a through hole (19). The connecting rod (18) passes through the through hole (19). The servo electric cylinder (17) is fixedly installed on the tensioning frame (4), and the output end of the servo electric cylinder (17) is connected to one of the connecting rods (18).

7. The kraft paper composite bubble wrap tensioning device according to claim 6, characterized in that: A controller (20) is installed on the fixed frame (1), and the controller (20) is electrically connected to the electric push rod (3), pressure sensor (8), servo motor (10), vision sensor (13) and servo electric cylinder (17).

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