Packaging film toughness testing device

Abstract

The invention discloses a packaging film toughness testing device, and belongs to the technical field of packaging film testing. The device mainly comprises a test board; a feeding assembly; a top cover is rotatably mounted on one side of the top of the fixed table, and a first motor is mounted on the fixed table; the puncturing assembly comprises a base, a first air cylinder is installed at the top of the base, a connecting base is installed at the output end of the first air cylinder, and a punch is installed in the connecting base; the connecting assembly comprises a fixing device which is arranged at the bottom, close to the second end, of the top cover; the material pushing device is suitable for pushing the materials on the first end to the second end, so that the two groups of materials are overlapped; and the binding device is located at the top of the top cover, and the binding device is suitable for fixedly connecting the two sets of materials. According to the packaging film toughness testing device, the connecting assembly is arranged, so that the two groups of broken packaging films are rapidly connected together, and the stability in the packaging film testing process is improved.

Description

Technical Field

[0001] The present application relates to the field of visual inspection technology, and in particular to a packaging film toughness testing device. Background Art

[0002] The packaging film toughness testing device is designed based on the principles of material mechanics. It simulates the external forces such as stretching and tearing that the packaging film may be subjected to during actual use, and uses a camera for visual inspection to accurately image the stress-bearing parts of the packaging film and output the image to an external receiving platform. This allows staff to accurately measure the deformation and fracture of the packaging film under these external forces, and then evaluate its toughness performance.

[0003] For example, the patent with publication number CN216247733U specifically discloses a damage detection mechanism for geomembrane. Through the arrangement of a winding roller, a baffle, a tensioning mechanism, an extrusion roller, a driving mechanism, an automatic detector and a camera, it has the advantage of being able to roll up the geomembrane and put the geomembrane in a tensioned state, so that the geomembrane can be photographed and the damage of the geomembrane can be automatically detected. It solves the problem that the current method of detecting geomembrane damage is generally through manual inspection, marking and cutting the damaged position, manual marking is time-consuming and labor-intensive, and the detection is not accurate enough. It can effectively improve the efficiency of geomembrane detection.

[0004] In the above patent, the two sets of devices perform real-time detection of the damaged parts of the geomembrane by setting up visual detection cameras, and then quickly detect whether there is damage, but no effective countermeasures are taken for the damage. At this time, if the degree of damage is large, during the winding process, as the reel rotates, the geomembrane is subjected to continuous tension, and the larger hole can easily become a stress concentration point. Once the tension exceeds the bearing limit of the remaining material at the hole, the geomembrane will break at this position, thereby affecting the test process. Therefore, it is necessary to provide a packaging film toughness testing device that can connect the damaged packaging film to solve the above problem.

[0005] It should be noted that the above information disclosed in this Background section is only for understanding the background technology of the present application concept, and therefore, it may contain information that does not constitute prior art. Summary of the Invention

[0006] Based on the above problems existing in the prior art, the problem to be solved by the present application is: to provide a packaging film toughness testing device that can quickly connect damaged packaging films without affecting the winding efficiency.

[0007] The technical solution adopted by the present application to solve its technical problems is: a packaging film toughness testing device, including a test bench; a feeding assembly, the feeding assembly including a unwinding roller and a winding roller; a fixing assembly, the fixing assembly including a fixing table, a top cover is rotatably installed on one side of the top of the fixing table, a first motor is installed on the fixing table, and the output end of the first motor is connected to the top cover; the end of the top of the fixing table near the unwinding roller is set as the first end, and the end of the top of the fixing table near the winding roller is set as the second end; a puncture assembly, the puncture assembly including a base, a first cylinder is installed on the top of the base, the output end of the first cylinder passes through the base and is installed with a connecting seat, and a punch is installed inside the connecting seat; the connecting assembly includes a fixing device arranged on the bottom of the top cover near the second end, the fixing device is suitable for fixing the material on the top of the second end; a pushing device, the pushing device is suitable for pushing the material on the first end to the second end so that the two groups of materials overlap; a binding device, the binding device is located on the top of the top cover, and the binding device is suitable for fixedly connecting the two groups of materials.

[0008] Furthermore, the connecting assembly includes a second cylinder installed on the fixed platform close to the unwinding roller, the output end of the second cylinder passes through the fixed platform and is installed with a push rod, the push rod is hinged with a connecting rod on the side away from the fixed platform, a third motor is provided at the connection between the connecting rod and the push rod, and a roller is installed on the end of the connecting rod away from the push rod.

[0009] Furthermore, a negative pressure suction cup is provided at the bottom of the top cover near the second end.

[0010] Furthermore, a slope is provided on a side of the second end close to the roller.

[0011] Furthermore, the roller is made of rubber.

[0012] Furthermore, two sets of binding machines are fixedly installed on the top of the top cover near the second end, the bottom of the binding machine has an opening for releasing the staples, and the top cover is provided with holes adapted to the binding machine.

[0013] Furthermore, a recess is provided on the top of the second end, and the recess is adapted to fit the binding machine.

[0014] Furthermore, a conveying device is provided between the unwinding roller and the fixed table, and the conveying device includes two groups of vertical plates installed on the top of the test table, and two groups of feed rollers are rotatably installed between the two groups of vertical plates. A second motor is installed on one side of one group of the vertical plates, and the output end of the second motor is connected to one group of the feed rollers, and gears are installed on the side of the two groups of feed rollers away from the second motor.

[0015] Furthermore, a plurality of air nozzles are provided at the bottom of the roller.

[0016] Furthermore, a camera for visual inspection is provided on one side of the bottom of the base close to the punch.

[0017] The beneficial effect of the present application is that the present application provides a packaging film toughness testing device, which, by setting a connecting component, allows two groups of packaging films with holes to be quickly connected together, thereby solving the problem of winding breakage that may be caused by holes in the packaging film after testing, and improving the stability and reliability of the packaging film testing and production process.

[0018] In addition to the above-described purposes, features and advantages, the present application also has other purposes, features and advantages. The present application will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings that constitute part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation on this application. In the drawings: Figure 1 This is an overall schematic diagram of a packaging film toughness testing device in this application; Figure 2 for Figure 1 A magnified schematic diagram of point A in the middle; Figure 3 for Figure 1 Schematic diagram of the structure of the fixed component; Figure 4 for Figure 3 A magnified schematic diagram of point B in the middle; Figure 5 for Figure 1 Schematic diagram of the structure of the feeding component; Figure 6 for Figure 5 Installation diagram of the connecting components; Figure 7 for Figure 6 Schematic diagram of the specific structure of the connection components; Figure 8 This is a schematic diagram of the installation of the binding machine; Figure 9 for Figure 8 Enlarged schematic diagram of point C in the middle; Figure 10 for Figure 8 The enlarged schematic diagram of point D in the middle; Among them, the reference numerals in the figures are: 1. Test bench; 2. Feeding assembly; 21. Unwinding roller; 22. Rewinding roller; 3. Fixing assembly; 31. Fixing platform; 32. Top cover; 33. First motor; 4. Puncture assembly; 41. Base; 42. First cylinder; 43. Connecting seat; 44. Punch; 5. Connecting assembly; 51. Second cylinder; 52. Push rod; 521. Connecting rod; 53. Roller; 531. Air nozzle; 54. Negative pressure suction cup; 6. Binding machine; 61. Depression; 7. Incline; 8. Conveying device; 81. Vertical plate; 82. Feed roller; 83. Gear. DETAILED DESCRIPTION

[0020] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0021] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0022] Example 1: This example specifically describes the basic structure and working principle of a packaging film toughness testing device, specifically: like Figure 1-Figure 3 As shown, the present application provides a packaging film toughness testing device, including a test bench 1, which is set in a packaging film processing plant and is used to test the toughness of the packaging film after production, providing workers with detailed and accurate packaging film performance data, controlling product quality, and optimizing production processes; A feeding assembly 2 is provided on the top of the test bench 1, and the feeding assembly 2 includes a unwinding roller 21. The unwinding roller 21 is fixedly mounted on one side of the top of the test bench 1, and a rolled packaging film is wound on the unwinding roller 21. During the test, the unwinding roller 21 will rotate slowly to smoothly release the packaging film to provide material for the test. At the same time, a winding roller 22 is provided on the other side of the top of the test bench 1. The winding roller 22 is used to wind up the packaging film that has completed the test in an orderly manner to avoid the packaging film from being scattered and piled up in the test area, keeping the test environment clean and orderly, and providing convenience for subsequent processing or secondary utilization. In addition, the unwinding roller 21 and the winding roller 22 are both suitable for rotating under the control of the PLC control system to ensure the continuity and stability of the entire test process.

[0023] At the same time, a fixing assembly 3 is provided between the unwinding roller 21 and the winding roller 22. The fixing assembly 3 includes a fixing platform 31. The interior of the fixing platform 31 is hollow. At the same time, a top cover 32 is rotatably mounted on one side of the top of the fixing platform 31. The top cover 32 also has an opening. When the test is in progress, the packaging film will be clamped and fixed between the top cover 32 and the fixing platform 31, preventing the packaging film from moving or shaking during the test, thereby ensuring the accuracy and reliability of the test results. like Figure 4 As shown, in order to realize the automatic operation of the top cover 32, a first motor 33 is fixedly installed on one side of the fixed platform 31, and the output end of the first motor 33 is fixedly connected to the rotating shaft at the bottom of the top cover 32, so that the top cover 32 is suitable for rotating under the drive of the first motor 33. When the packaging film needs to be fixed, the first motor 33 drives the top cover 32 to rotate to a position tightly closed with the fixed platform 31, thereby completing the firm fixation of the packaging film. After the test is completed, the first motor 33 can drive the top cover 32 to rotate in the opposite direction to loosen the packaging film, so that the packaging film can smoothly enter the subsequent winding link.

[0024] like Figure 1-Figure 2 As shown, a puncture assembly 4 is provided on one side of the fixed platform 31. The puncture assembly 4 includes a base 41. A first cylinder 42 is fixedly installed on the top of the base 41. The output end of the first cylinder 42 passes through the base 41 and is fixedly installed with a connecting seat 43. When the first cylinder 42 is started, it can drive the connecting seat 43 to reciprocate up and down. At the same time, a punch 44 is detachably installed inside the connecting seat 43. During the test process, the staff can quickly replace the punch 44 of different sizes, shapes or materials according to different test requirements to simulate the puncture force that the packaging film may be subjected to in various actual use scenarios, thereby obtaining more comprehensive and accurate test data. The bottom surface of the punch 44 is arc-shaped. This rounded shape can better contact the surface of the packaging film, so that the puncture force is evenly distributed, avoiding interference with the test results due to local stress concentration; A pressure sensor is also provided inside the connecting seat 43. When the punch 44 contacts the packaging film and continues to press down until a hole is formed in the packaging film, the pressure exerted on the punch 44 can be detected in real time, and the test data can be accurately transmitted to an external data processing system or display device, providing a basis for subsequent data analysis and quality assessment.

[0025] When it is necessary to perform a toughness test on the packaging film, the packaging film is first fixed on the fixing platform 31 through the top cover 32 in the fixing component 3 to ensure that the packaging film will not be displaced or shaken during the test. Then the first cylinder 42 is started, and the first cylinder 42 drives the connecting seat 43 to move downward, so that the punch 44 contacts the packaging film. As the first cylinder 42 continues to push, the pressure applied by the punch 44 to the packaging film gradually increases until a hole is formed in the packaging film. During this process, the pressure sensor inside the connecting seat 43 will record the pressure changes exerted on the punch 44, and by analyzing these pressure data, the staff can quickly detect the toughness index of the packaging film, thereby realizing a rapid test of the quality of the packaging film.

[0026] Example 2: Since the packaging film may have holes after the test, if the holes are large, they may break during the subsequent winding process, thereby affecting the testing process. Therefore, improvements are made to the fixing component 3, specifically: like Figure 1 、 Figure 5-Figure 7 As shown, when the punch 44 applies pressure to the packaging film, a hole will first appear in the center of the packaging film. If the packaging film continues to be wound at this time, the connection strength at the hole in the packaging film will be reduced, which may easily cause the packaging film to break during the winding process. For this reason, the top of the fixing platform 31 is defined as the two ends for placing the packaging film, wherein the end close to the unwinding roller 21 is set as the first end, and the end close to the winding roller 22 is set as the second end. In order to achieve real-time monitoring of the status of holes in the packaging film, a visual inspection camera (not shown) is installed at the bottom of the base 41 near the side of the punch 44. The visual inspection camera can clearly capture the status of the packaging film during and after the punch 44 applies pressure to the packaging film, especially accurately imaging whether there is a hole in the center of the packaging film. Once a hole in the packaging film is detected, the system will make a corresponding judgment based on the size and status of the hole to decide whether to initiate subsequent reinforcement operations: if the hole is small, it will not have a significant impact on the winding effect, and the winding operation can be continued. If the detected hole is large, continuing to wind may cause the packaging film to break, and the packaging film at both ends of the hole needs to be reinforced. In order to quickly and effectively connect the two ends of the packaging film with a large hole and reduce the pressure and failure that may occur during the subsequent winding process, a connecting component 5 is provided on the fixing table 31; like Figure 6-Figure 9As shown, the connecting assembly 5 includes a fixing device arranged at the bottom of the top cover 32, and the fixing device includes a negative pressure suction cup 54 arranged at the bottom of the top cover 32 near the second end. The negative pressure suction cup 54 is connected to an external air pump (not shown in the figure). The negative pressure generated by the air pump can adsorb the packaging film on the side of the fixing platform 31 near the winding roller 22. When the top cover 32 is opened, the packaging film on the second end will be adsorbed by the negative pressure suction cup 54 and lifted upward to prepare for the subsequent connection operation. It should be noted that at the beginning of each test, the size of the hole in the packaging film is detected by a visual inspection camera. When the hole size exceeds the rated value, so that the subsequent stretching may tear the packaging film, the PLC control system will control the unwinding roller 21 to unwind a certain length of packaging film. The unwinding length is half the size of the packaging film inside the fixed platform 31. The delivery of this extra length of packaging film ensures that the connecting component 5 has sufficient material for the connecting operation. After unwinding, the excess packaging film inside the fixed platform 31 is in a hanging state. like Figure 5 As shown, at the same time, since the winding roller 22 stops working while the unwinding roller 21 is still unwinding, the newly delivered packaging film may hang down between the unwinding roller 21 and the fixed platform 31. These hanging packaging films are difficult to move to the top of the fixed platform 31 by themselves. For this reason, a conveying device 8 is provided between the unwinding roller 21 and the fixed platform 31. The conveying device 8 includes two sets of vertical plates 81 fixedly installed on the top of the test platform 1. Two sets of feed rollers 82 are rotatably installed between the two sets of vertical plates 81. The size between the two sets of feed rollers 82 is adapted to the size of the packaging film, and the packaging film is located between the two sets of feed rollers 82. At the same time, a second motor (not shown in the figure) is fixedly installed on one side of one group of vertical plates 81, and the output end of the second motor is fixedly connected to one group of feed rollers 82, so that it is easy to drive the feed rollers 82 to rotate. At the same time, two groups of gears 83 are meshed and installed on the side of the two groups of feed rollers 82 away from the second motor, so that when one group of feed rollers 82 rotates, the gears 83 will drive the other group of feed rollers 82 to rotate in the opposite direction, and then the rotation of the second motor can drive the two groups of feed rollers 82 to rotate in the opposite direction, and the packaging film hanging between the unwinding roller 21 and the fixed platform 31 is accurately transferred to the top of the fixed platform 31, providing a strong guarantee for subsequent connection operations.

[0027] like Figure 7-10As shown, the connecting assembly 5 also includes a pushing device arranged on the fixed platform 31, which includes a second cylinder 51 fixedly mounted on the fixed platform 31 near the first end. The output end of the second cylinder 51 passes through the fixed platform 31 and is fixedly mounted with a push rod 52. At the same time, a connecting rod 521 is hinged on the side of the push rod 52 away from the fixed platform 31. A third motor (not shown in the figure) is provided at the connection between the connecting rod 521 and the push rod 52, and an infrared detector is provided on the side near the second end of the fixed platform 31. The infrared detector is used to cooperate with the third motor. At the same time, a roller 53 is fixedly mounted on the other end of the connecting rod 521. The roller 53 is suitable for contacting and lifting the packaging film in the suspended state, so that the roller 53 is suitable for rotating under the drive of the third motor. In order to increase friction and prevent the packaging film from falling, the material of the roller 53 is set to a rubber material with greater friction, and a plurality of air nozzles 531 are provided at the bottom of the roller 53. The air nozzles 531 are connected to an external air pump. In order to ensure that the packaging film can be transferred to the top of the second end without obstruction, an inclined surface 7 is provided on the side of the second end near the roller 53. In the initial state, the packaging film naturally hangs on the inner side of the fixed platform 31. Then, the roller 53 is extended forward by the second cylinder 51 and contacts the packaging film. At this time, the packaging film is located at the front end of the roller 53. At the same time, the external air pump causes the air nozzle 531 to suck air, so that the packaging film is temporarily adsorbed on the roller 53 by the air nozzle 531. Then, the packaging film is moved to the side of the second end by the second cylinder 51. When the roller 53 reaches the vicinity of the inclined surface 7, the infrared detector cooperates with the third motor, causing the third motor to drive the roller 53 to rotate upward with the connection with the push rod 52 as the center, so that the packaging film is lifted by the roller 53 and quickly moved to the top of the second end. At this time, there is a gap between the roller 53 and the inclined surface 7. When a lot of packaging film hangs on the top of the roller 53, as the roller 53 moves, the packaging film at the front end of the roller 53 will temporarily enter the gap between the roller 53 and the inclined surface 7 to prevent the packaging film from being clamped between the roller 53 and the inclined surface 7. Then the roller 53 continues to move and drives the packaging film to cross the inclined surface 7 and reach the top of the second end. At this time, the packaging film will break away from the gap and be driven to the top of the second end by the roller 53. When the roller 53 moves the packaging film to the connection position at the top of the second end, the air nozzle 531 stops sucking air. To prevent the packaging film from sticking to the roller 53, when the roller 53 retreats, multiple groups of air nozzles 531 will blow air simultaneously under the drive of the air pump, so that the packaging film is separated from the roller 53 and the hanging packaging film is blown to the top of the second end. The roller 53 will then return to its initial state under the action of the third motor to prepare for the next transportation. The design of the inclined surface 7 enables the packaging film to reach the second end more smoothly, ensuring that the two ends are accurately aligned. After the transportation is completed, the top cover 32 will fall again, so that the two ends of the hole in the packaging film will be folded and overlapped. When a hole appears in the packaging film after the stamping test, the camera will determine the state of the hole. If the hole is small, it will not have a significant impact on the winding effect. The top cover 32 will be lifted according to the normal procedure and will not impose additional restrictions on the packaging film. At this time, the packaging film can be wound normally. When the hole is large and may affect the winding effect, the winding roller 22 will stop rotating, and the unwinding roller 21 will continue to transport the packaging film forward for a distance to provide sufficient material for subsequent connection operations. At the same time, the negative pressure suction cup 54 will adsorb the packaging film at the bottom of the second end, and then the top cover 32 will be driven by the first motor 33 and drive the packaging film to rise slowly for a short distance. At this time, since the unwinding roller 21 is continuously unwinding, the packaging film will not be broken due to the action of the top cover 32, and then the packaging film can be quickly transported to the second end through the roller 53. Finally, the top cover 32 will fall again, so that the two ends of the hole in the packaging film will fold and overlap together.

[0028] like Figures 8-10 As shown, a binding device is provided on the top cover 32, which includes two sets of binding machines 6 fixedly installed on the top near the second end. The bottom of the binding machine 6 has an opening for releasing the nails, and the top cover 32 is provided with holes adapted to the binding machine 6, so that the binding machine 6 can release the nails to the packaging film. When the two ends of the packaging film are folded and overlapped, the binding machine 6 will release the nails to the packaging film through the holes, and the two sets of overlapping packaging films will be firmly bound together. A pit 61 is also provided on the top of the second end, and when the roller 53 feeds the hanging packaging film to the top of the second end, it will pass over the pit 61, thereby driving the part with the hole at the front end of the hanging packaging film to pass over the pit 61, and the part at the bottom end of the hanging packaging film will enter the inside of the pit 61. When the nail penetrates the packaging film, it will enter the pit 61. Due to the space limitation of the pit 61, the nail will bend therein, which not only enhances the connection strength between the nail and the packaging film, but also enables the nail to better fit the surface of the packaging film, avoiding the protrusion of the nail causing interference with subsequent winding, transportation and other links. This binding method not only has a firm connection, but is also simple and quick to operate, which can greatly improve production efficiency.

[0029] In summary, this device sets the connecting component 5 so that the two groups of packaging films with holes can be quickly connected together, solving the problem of winding breakage caused by holes in the packaging film after testing, improving the stability and reliability of the packaging film testing and production process, and providing strong guarantees for the company's production.

[0030] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A packaging film toughness testing device, characterized by: include: Testbench (1); A feeding assembly (2), the feeding assembly (2) comprising a unwinding roller (21) and a winding roller (22); A fixing assembly (3), the fixing assembly (3) comprising a fixing platform (31), a top cover (32) being rotatably mounted on one side of the top of the fixing platform (31), a first motor (33) being mounted on the fixing platform (31), and an output end of the first motor (33) being connected to the top cover (32); An end of the top of the fixed platform (31) close to the unwinding roller (21) is set as a first end, and an end of the top of the fixed platform (31) close to the winding roller (22) is set as a second end; A puncture assembly (4), comprising a base (41), a first cylinder (42) being mounted on the top of the base (41), an output end of the first cylinder (42) passing through the base (41) and being mounted with a connecting seat (43), and a punch (44) being mounted inside the connecting seat (43); A connecting assembly (5), the connecting assembly (5) comprising a fixing device provided on the bottom of the top cover (32) near the second end, the fixing device being suitable for fixing the material on the top of the second end; a material pushing device adapted to push the materials on the first end to the second end so that the two groups of materials overlap; A binding device is located on the top of the top cover (32), and the binding device is suitable for fixedly connecting two groups of materials.

2. A packaging film toughness testing device according to claim 1, characterized in that: The connecting assembly (5) comprises a second cylinder (51) mounted on the fixed platform (31) near the unwinding roller (21), an output end of the second cylinder (51) passing through the fixed platform (31) and being mounted with a push rod (52), a connecting rod (521) being hingedly connected to a side of the push rod (52) away from the fixed platform (31), a third motor being provided at a connection between the connecting rod (521) and the push rod (52), and a roller (53) being mounted on an end of the connecting rod (521) away from the push rod (52).

3. The packaging film toughness testing device according to claim 2, characterized in that: A negative pressure suction cup (54) is provided at the bottom of the top cover (32) near the second end.

4. The packaging film toughness testing device according to claim 3, characterized in that: A slope (7) is provided on the side of the second end close to the roller (53).

5. The packaging film toughness testing device according to claim 4, characterized in that: The supporting roller (53) is made of rubber.

6. The packaging film toughness testing device according to claim 5, characterized in that: Two sets of binding machines (6) are fixedly mounted on the top of the top cover (32) near the second end. The bottom of the binding machine (6) has an opening for releasing the staples. The top cover (32) is provided with holes adapted to the binding machine (6).

7. The packaging film toughness testing device according to claim 6, characterized in that: A recess (61) is also provided on the top of the second end, and the recess (61) is adapted to the binding machine (6).

8. The packaging film toughness testing device according to claim 1, characterized in that: A conveying device (8) is provided between the unwinding roller (21) and the fixed platform (31), and the conveying device (8) comprises two groups of vertical plates (81) installed on the top of the test platform (1), and two groups of feeding rollers (82) are rotatably installed between the two groups of vertical plates (81), a second motor is installed on one side of one group of the vertical plates (81), and the output end of the second motor is connected to one group of the feeding rollers (82), and a gear (83) is installed on the side of the two groups of feeding rollers (82) away from the second motor.

9. The packaging film toughness testing device according to claim 5, characterized in that: A plurality of groups of air nozzles (531) are provided at the bottom of the roller (53).

10. The packaging film toughness testing device according to claim 1, characterized in that: A camera for visual inspection is provided on one side of the bottom of the base (41) close to the punch (44).

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