A kind of soft printing packaging bag detection device and its detection method

Abstract

The application relates to the technical field of intelligent detection, in particular to a detection device for flexible printing packaging bags and a detection method thereof, which comprises a detection device base, a caterpillar type conveying belt and a moving placement frame. A second ball bearing is rotationally installed on the inner wall of the moving placement frame, the outer wall of the second ball bearing is fixedly connected with a first square sleeve rod, the outer wall of the first square sleeve rod is slidably sleeved with a second square sleeve rod. With the continuous movement of the moving placement frame, one side of the packaging bag is upwardly deflected, so that the uneven part of the side surface of the packaging bag is detected by the intelligent visual sensor. When the moving placement frame continues to move, the third ball bearing swings downwardly with the clamping frame as a whole, one side of the packaging bag swings downwardly, so that more visual angles are exposed to the intelligent visual sensor for detection. The movement of the packaging bag can be accompanied by directional deflection in the upward and downward directions, so that the packaging bag can be more uniformly detected.

Description

Technical Field

[0001] This invention relates to the field of intelligent detection technology, specifically to a detection device and method for flexographic printing packaging bags. Background Technology

[0002] Flexographic printing packaging bags refer to flexible packaging bags made by printing patterns and text using flexible letterpress printing technology and then forming the bags. After production, these packaging bags usually need to be sampled for intelligent visual inspection to ensure that the printed patterns and fonts on the packaging bags are clear and effective enough. The inspection usually requires the use of intelligent visual sensors.

[0003] Currently available flexographic printing packaging bag inspection devices have limitations. Because packaging bags are relatively soft, they cannot be inspected as flatly as hard objects. Uneven surfaces create blind spots and are prone to misjudgment, requiring staff to repeatedly remove the bags for multi-angle inspection, which is particularly inconvenient. Furthermore, printed packaging bags undergo water spray testing. Due to their softness and unevenness when held, water spraying from above causes water to slide down the raised areas, preventing even coverage. Additionally, some water remains on the surface, leading to inaccurate test data. Summary of the Invention

[0004] The purpose of this invention is to provide a testing device and method for flexographic printing packaging bags, in order to solve the problems mentioned in the background art, such as the need for workers to remove the packaging bags multiple times for multi-angle testing, water flowing down along the protrusions and failing to effectively and evenly cover the packaging bags, and water droplets remaining on the surface of the packaging bags after spraying, which can easily lead to inaccurate test data.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a detection device and method for flexographic printing packaging bags, comprising a detection device base, a conveyor belt, and a movable placement frame. A second ball bearing is rotatably mounted on the inner wall of the movable placement frame. A first square sleeve rod is fixedly connected to the outer wall of the second ball bearing. A second square sleeve rod is slidably mounted on the outer wall of the first square sleeve rod. A return spring is fixedly connected to the inner wall of the second square sleeve rod. One end of the return spring is fixedly connected to the end of the first square sleeve rod. A bending spring is mounted on the first square sleeve rod. One end of the bending spring is fixedly connected to the inner wall of the movable placement frame. The other end of the bending spring is fixedly connected to a clamping frame. One end of the second square sleeve rod is fixedly connected to the outer wall of the clamping frame. A second guide rod is fixedly connected to the outer wall of the clamping frame. A third ball bearing is rotatably mounted on one end of the second guide rod. A transmission gear is fixedly connected to the outer wall of the second guide rod.

[0006] Preferably, the inner wall of the clamping frame is threaded with a fixing bolt, one end of the fixing bolt is rotatably mounted with a pressure plate, and the inner wall of the clamping frame is fixedly connected with a fixing plate.

[0007] Preferably, the outer wall of the base of the detection device is fixedly installed with the outer shell of the detection device, the inner wall of the outer shell of the detection device is fixedly connected with a guide plate, the outer wall of the guide plate is fixedly connected with a transmission rack, the movement path of the transmission gear can mesh with the transmission rack, and a sliding groove is provided through the movable placement frame, and the second guide rod slides in the sliding groove.

[0008] Preferably, the guide plate has a first track groove, a second track groove, a third track groove, and a fourth track groove, which are interconnected. The first and fourth track grooves are straight grooves, while the second and third track grooves are curved grooves. The movement path of the third ball can slide into the first track groove. The inner wall of the fourth track groove is fixedly connected with a plurality of evenly distributed second abutment blocks, which are spherical blocks.

[0009] Preferably, an intelligent vision sensor is fixedly installed on the inner wall of the outer shell of the detection device, and a feed inlet is provided on the outer wall of the outer shell of the detection device.

[0010] Preferably, a drive motor is fixedly installed on the inner wall of the outer shell of the detection device. A drive rod is fixedly connected to the output end of the drive motor. A rotating block is fixedly connected to one end of the drive rod. A rotating rod is fixedly connected to the inner wall of the rotating block. A fixed frame is rotatably connected to the end of the rotating rod. A torsion spring is sleeved on the rotating rod. One end of the torsion spring is fixedly connected to the inner wall of the fixed frame. The other end of the torsion spring is fixedly connected to the outer wall of the rotating block. A water storage tray is fixedly connected to the outer wall of the fixed frame. Multiple evenly distributed spray heads are fixedly connected to the outer wall of the water storage tray.

[0011] Preferably, a rotating ring is rotatably mounted on the outer wall of the water storage pan, the rotating ring is in communication with the inner wall of the water storage pan, and a water supply pipe is fixedly connected to the outer wall of the rotating ring.

[0012] Preferably, a first guide rod is fixedly connected to the outer wall of the water storage pan, and a first ball bearing is rotatably installed at the end of the first guide rod. A plurality of first abutment blocks are fixedly connected to the outer wall of the transmission motor, and the first abutment blocks are configured as spherical blocks.

[0013] Preferably, a control button is fixedly installed on the outer wall of the base of the detection device, a bracket is fixedly connected to the outer wall of the tracked conveyor belt, and the movable placement frame is fixedly connected to the moving end of the tracked conveyor belt.

[0014] This invention also discloses a method for using an inspection device for flexographic printing packaging bags, comprising the following steps: S1. Place the packaging bag to be tested into the mobile placement box for clamping and fixing. Then start the tracked conveyor belt. The tracked conveyor belt moves and carries the packaging bag clamped in the mobile placement box into the testing stage. S2. During detection, the sensor takes a wide-angle picture of the packaging bag and performs visual inspection on the printed material on the surface of the packaging bag. S3. During the conveying of the packaging bag, the clamping frame adjusts the orientation of the packaging bag to make the detection angle more comprehensive and the accuracy higher. S4. After conducting a comprehensive spray test on the packaging bag to test its printing quality after contact with water, the bag is then photographed and identified. After the spray test is completed, the packaging bag is flipped over and a new round of intelligent visual inspection is performed on the back of the packaging bag.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, as the moving placement frame continues to move, one side of the packaging bag deflects upward, so that the uneven part of the side of the packaging bag is detected by the intelligent vision sensor. When the moving placement frame continues to move, the third ball causes the clamping frame to swing downward, and one side of the packaging bag swings downward, so that more angles are exposed to the intelligent vision sensor for detection. The movement of the packaging bag can be accompanied by directional deflection in the up and down direction, so that the packaging bag can be detected more evenly.

[0016] 2. In this invention, multiple spray heads can rotate in a circular motion to spray water more evenly onto the packaging bag below. As the rotating ring rotates, multiple first contact blocks are provided, causing the water storage tray to swing down and then reset repeatedly during rotation, resulting in a circular wavy spray trajectory that more evenly covers the uneven surface of the packaging bag below. After spraying water, the intelligent vision sensor can continue to photograph the state of the sprayed surface to determine the impact of the spraying on its printing.

[0017] 3. In this invention, during the flipping process, the third ball slides along the fourth track groove. Since there are multiple second abutment blocks, the packaging bag will vibrate back and forth, causing the water droplets on the surface to fall off during the flipping process. At this time, the intelligent vision sensor can continue to detect during the flipping process, thus solving the problem of water droplets affecting the detection. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the overall front view of the present invention; Figure 3 This is a schematic diagram of the water storage pan and its surrounding structure according to the present invention; Figure 4 This is a bottom view of the water storage tray and its surrounding structure according to the present invention; Figure 5 This is a schematic diagram of the overall front cross-sectional structure of the present invention; Figure 6 This is a schematic diagram of the movable placement frame and its surrounding structure according to the present invention; Figure 7 This is a schematic diagram of the cross-sectional structure of the movable placement frame and its surrounding area according to the present invention; Figure 8 For the present invention Figure 7 Enlarged structural diagram at point A in the middle.

[0019] In the attached diagram, the components represented by each number are as follows: 1. Detection device base; 2. Control button; 3. Bracket; 4. Tracked conveyor belt; 5. Detection device housing; 6. Feed inlet; 7. Moving placement frame; 8. Drive motor; 9. Drive rod; 10. Rotating rod; 11. Rotating block; 12. Torsion spring; 13. Fixed frame; 14. Rotating ring; 15. Water supply pipe; 16. Water storage tray; 17. Spray head; 18. First guide rod; 19. First ball bearing; 20. First contact block; 21. Intelligent vision sensor; 22. Guide plate; 23. First track groove; 24. Second track groove; 25. Third track groove; 26. Fourth track groove; 27. Second abutment block; 28. Transmission rack; 29. ​​Second ball bearing; 30. First square sleeve rod; 31. Second square sleeve rod; 32. Bending spring; 33. Return spring; 34. Clamping frame; 35. Second guide rod; 36. Transmission gear; 37. Third ball bearing; 38. Fixing bolt; 39. Pressure plate; 40. Fixing plate; 41. Sliding groove. Detailed Implementation

[0020] 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.

[0021] This invention provides a technical solution: such as Figure 1 - Figure 8The invention disclosed is a testing device and method for flexographic printing packaging bags, comprising a testing device base 1, a conveyor belt 4, and a movable placement frame 7. A second ball bearing 29 is rotatably mounted on the inner wall of the movable placement frame 7. A first square sleeve rod 30 is fixedly connected to the outer wall of the second ball bearing 29. A second square sleeve rod 31 is slidably mounted on the outer wall of the first square sleeve rod 30. A return spring 33 is fixedly connected to the inner wall of the second square sleeve rod 31. One end of the return spring 33 is fixedly connected to the end of the first square sleeve rod 30. A bending spring 32 is mounted on the first square sleeve rod 30. One end of the bending spring 32 is fixedly connected to the inner wall of the movable placement frame 7, and the other end of the bending spring 32 is fixedly connected to a clamping frame 34. One end of the second square sleeve rod 31 is fixedly connected to the outer wall of the clamping frame 34. A second guide rod 35 is fixedly connected to the outer wall of the clamping frame 34. A third ball bearing 37 is rotatably mounted on one end of the second guide rod 35, and a transmission gear 36 is fixedly connected to the outer wall of the second guide rod 35.

[0022] The inner wall of the clamping frame 34 is threaded with a fixing bolt 38, and a pressure plate 39 is rotatably installed on one end of the fixing bolt 38. The inner wall of the clamping frame 34 is fixedly connected with a fixing plate 40.

[0023] The outer wall of the detection device base 1 is fixedly installed with the detection device housing 5. The inner wall of the detection device housing 5 is fixedly connected with the guide plate 22. The outer wall of the guide plate 22 is fixedly connected with the transmission rack 28. The moving path of the transmission gear 36 can mesh with the transmission rack 28. A sliding groove 41 is opened through the moving placement frame 7. The second guide rod 35 slides in the sliding groove 41.

[0024] The guide plate 22 has a first track groove 23, a second track groove 24, a third track groove 25 and a fourth track groove 26. The first track groove 23, the second track groove 24, the third track groove 25 and the fourth track groove 26 are interconnected. The first track groove 23 and the fourth track groove 26 are straight grooves, and the second track groove 24 and the third track groove 25 are curved grooves. The movement path of the third ball 37 can slide into the first track groove 23. The inner wall of the fourth track groove 26 is fixedly connected with a plurality of evenly distributed second abutment blocks 27, which are spherical blocks.

[0025] A smart vision sensor 21 is fixedly installed on the inner wall of the outer casing 5 of the detection device, and a feed inlet 6 is opened on the outer wall of the outer casing 5 of the detection device.

[0026] A drive motor 8 is fixedly installed on the inner wall of the outer casing 5 of the detection device. A drive rod 9 is fixedly connected to the output end of the drive motor 8. A rotating block 11 is fixedly connected to one end of the drive rod 9. A rotating rod 10 is fixedly connected to the inner wall of the rotating block 11. A fixed frame 13 is rotatably connected to the end of the rotating rod 10. A torsion spring 12 is sleeved on the rotating rod 10. One end of the torsion spring 12 is fixedly connected to the inner wall of the fixed frame 13. The other end of the torsion spring 12 is fixedly connected to the outer wall of the rotating block 11. A water storage tray 16 is fixedly connected to the outer wall of the fixed frame 13. Multiple evenly distributed spray heads 17 are fixedly connected to the outer wall of the water storage tray 16.

[0027] A rotating ring 14 is rotatably mounted on the outer wall of the water storage pan 16. The rotating ring 14 is connected to the inner wall of the water storage pan 16. A water supply pipe 15 is fixedly connected to the outer wall of the rotating ring 14.

[0028] A first guide rod 18 is fixedly connected to the outer wall of the water storage pan 16. A first ball bearing 19 is rotatably installed at the end of the first guide rod 18. A plurality of first contact blocks 20 are fixedly connected to the outer wall of the drive motor 8. The first contact blocks 20 are configured as spherical blocks.

[0029] A control button 2 is fixedly installed on the outer wall of the base 1 of the detection device, a bracket 3 is fixedly connected to the outer wall of the tracked conveyor belt 4, and a movable placement frame 7 is fixedly connected to the moving end of the tracked conveyor belt 4.

[0030] Working principle: When using this flexographic printing packaging bag detection device, the sampled packaging bag is first placed between the inner wall of the clamping frame 34 and the fixing plate 40. Then, the fixing bolt 38 is rotated. The fixing bolt 38 moves down through the threaded connection with the clamping frame 34. During the downward movement, the pressure plate 39 moves down synchronously, and finally the pressure plate 39 presses the corners of the packaging bag between the fixing plate 40 and the pressure plate 39 to fix it. Then the tracked conveyor belt 4 is started. After the tracked conveyor belt 4 is started, its tracked part begins to move, and the moving placement box 7 moves synchronously. The moving placement box 7 moves into the inner shell 5 of the detection device through the feed port 6. At this time, the intelligent vision sensor 21 begins to take pictures of the packaging bag below for intelligent recognition, and can preliminarily determine whether the printing of the packaging bag is defective. As the movable placement frame 7 continues to move, the third ball bearing 37, protruding from the outside of the movable placement frame 7, slides into the first track groove 23 and then slides along the first track groove 23 into the second track groove 24. Since the second track groove 24 is an upwardly curved track groove, the third ball bearing 37 is guided upward by the curved inner wall of the second track groove 24 and subjected to upward force. At this time, the third ball bearing 37, along with the second guide rod 35, the clamping frame 34, the second square sleeve rod 31, the first square sleeve rod 30, and the second ball bearing 29, rotates upward along the rotational connection of the second ball bearing 29, causing one side of the packaging bag to deflect upward, so that the uneven part of the side of the packaging bag is detected by the intelligent vision sensor 21. When the movable placement frame 7 continues to move, the third ball bearing 37 continues to slide along the second track groove 24 into the third track groove 25. Since the third track groove 25 is set as a downwardly curved track groove, the third ball bearing 37, along with the clamping frame 34, swings downward as a whole, and one side of the packaging bag swings downward, so that more angles are exposed to the intelligent vision sensor 21 for detection.

[0031] Having completely inspected one side of the packaging bag, the external pump is now connected to the water supply pipe 15. The external pump continuously pumps pressurized water into the water supply pipe 15, which then enters the rotating ring 14. Since the rotating ring 14 is connected to the water storage tray 16, the water is finally sprayed downwards through the spray nozzles 17. At this point, the drive motor 8 is activated, and its output drives the drive rod 9 to rotate. The drive rod 9 then rotates the entire water storage tray 16, allowing multiple spray nozzles 17 to rotate in a circular motion and spray water more evenly onto the packaging bag below. As the rotating ring 14 rotates, it also causes the first guide rod 18 and the first ball bearing 19 to rotate synchronously. During the circumferential movement of the first ball bearing 19, multiple first contact blocks 20 will collide. This collision causes the first guide rod 18 to exert downward force on one side of the water storage tray 16. The water storage tray 16, along with the fixed frame 13, rotates along the end of the rotating rod 10, causing one side of the water storage tray 16 to swing down. During the swing, the torsion spring 12 is twisted to facilitate subsequent reset. Since there are multiple first contact blocks 20, the water storage tray 16 will reciprocate and vibrate during rotation, resulting in a circular wavy water spray trajectory that more evenly covers the uneven surface of the packaging bag below. After spraying water, the intelligent vision sensor 21 can continue to photograph the state of the sprayed surface to determine the impact of the spray on its printing.

[0032] As the movable placement frame 7 continues to move, the third ball bearing 37 slides from the third track groove 25 into the fourth track groove 26. At this time, the transmission gear 36 meshes with the transmission rack 28. This meshing causes the transmission gear 36 to synchronously rotate the second guide rod 35, the second square sleeve rod 31, the first square sleeve rod 30, and the second ball bearing 29 until the packaging is flipped over. At this point, the intelligent vision sensor 21 can capture and detect the flipped packaging bag. It should be noted that during the flipping process, the third ball bearing 37 slides along the fourth track groove 26 and abuts against the multiple evenly distributed second abutment blocks 27 in the fourth track groove 26. This abutment causes the third ball bearing 37 to move along the second guide rod 35, the second square sleeve rod 31, the first square sleeve rod 30, and the second ball bearing 29. The holding frame 34 and the second square sleeve 31 move toward the first square sleeve 30. Since the first square sleeve 30 cannot move horizontally, the second square sleeve 31 will gradually fit onto the outer wall of the first square sleeve 30 and gradually compress the return spring 33. At this time, the entire clamping frame 34 moves slightly with the packaging bag. When the contact with the second abutment block 27 ends, the return spring 33 resets the clamping frame 34 and the packaging bag. Since there are multiple second abutment blocks 27, the packaging bag will vibrate back and forth, shaking off the water droplets on the surface during the flipping process. At this time, the intelligent vision sensor 21 can continue to detect during the flipping process, solving the problem of water droplets affecting the detection.

[0033] This invention also discloses a method for using an inspection device for flexographic printing packaging bags, comprising the following steps: S1. Place the packaging bag to be tested into the mobile placement box 7 for clamping and fixing. Then start the tracked conveyor belt 4. The tracked conveyor belt 4 moves and carries the packaging bag clamped in the mobile placement box 7 into the testing stage. S2. During detection, the sensor takes a wide-angle picture of the packaging bag and performs visual inspection on the printed material on the surface of the packaging bag. S3. During the conveying of the packaging bag, the clamping frame 34 adjusts the orientation of the packaging bag to make the detection angle more comprehensive and the accuracy higher. S4. After conducting a comprehensive spray test on the packaging bag to test its printing quality after contact with water, the bag is then photographed and identified. After the spray test is completed, the packaging bag is flipped over and a new round of intelligent visual inspection is performed on the back of the packaging bag.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0035] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A detection device for flexographic printing packaging bags, comprising a detection device base (1), a conveyor belt (4), and a movable placement frame (7), characterized in that: The inner wall of the movable placement frame (7) is rotatably mounted with a second ball bearing (29). The outer wall of the second ball bearing (29) is fixedly connected with a first square sleeve rod (30). The outer wall of the first square sleeve rod (30) is slidably fitted with a second square sleeve rod (31). The inner wall of the second square sleeve rod (31) is fixedly connected with a return spring (33). One end of the return spring (33) is fixedly connected with the end of the first square sleeve rod (30). A bending spring (32) is fitted on the first square sleeve rod (30). One end of the bending spring (32) is fixedly connected with the inner wall of the movable placement frame (7). The other end of the bending spring (32) is fixedly connected with a clamping frame (34). One end of the second square sleeve rod (31) is fixedly connected with the outer wall of the clamping frame (34). The outer wall of the clamping frame (34) is fixedly connected with a second guide rod (35). One end of the second guide rod (35) is rotatably mounted with a third ball bearing (37). The outer wall of the second guide rod (35) is fixedly connected with a transmission gear (36).

2. The detection device for flexographic printing packaging bags according to claim 1, characterized in that: The inner wall of the clamping frame (34) is threaded with a fixing bolt (38), and a pressure plate (39) is rotatably installed on one end of the fixing bolt (38). The inner wall of the clamping frame (34) is fixedly connected with a fixing plate (40).

3. The detection device for flexographic printing packaging bags according to claim 1, characterized in that: The outer wall of the base (1) of the detection device is fixedly installed with the outer shell (5) of the detection device. The inner wall of the outer shell (5) of the detection device is fixedly connected with a guide plate (22). The outer wall of the guide plate (22) is fixedly connected with a transmission rack (28). The moving path of the transmission gear (36) can mesh with the transmission rack (28). A sliding groove (41) is provided through the moving placement frame (7). The second guide rod (35) slides in the sliding groove (41).

4. The detection device for flexographic printing packaging bags according to claim 3, characterized in that: The guide plate (22) is provided with a first track groove (23), a second track groove (24), a third track groove (25) and a fourth track groove (26). The first track groove (23), the second track groove (24), the third track groove (25) and the fourth track groove (26) are interconnected. The first track groove (23) and the fourth track groove (26) are set as straight grooves, and the second track groove (24) and the third track groove (25) are set as curved grooves. The movement path of the third ball (37) can slide into the first track groove (23). The inner wall of the fourth track groove (26) is fixedly connected with a plurality of evenly distributed second abutment blocks (27). The second abutment blocks (27) are set as spherical blocks.

5. The detection device for flexographic printing packaging bags according to claim 3, characterized in that: The inner wall of the outer shell (5) of the detection device is fixedly installed with an intelligent vision sensor (21), and the outer wall of the outer shell (5) of the detection device is provided with a feed inlet (6).

6. The detection device for flexographic printing packaging bags according to claim 3, characterized in that: A drive motor (8) is fixedly installed on the inner wall of the outer shell (5) of the detection device. A drive rod (9) is fixedly connected to the output end of the drive motor (8). A rotating block (11) is fixedly connected to one end of the drive rod (9). A rotating rod (10) is fixedly connected to the inner wall of the rotating block (11). A fixed frame (13) is rotatably connected to the end of the rotating rod (10). A torsion spring (12) is sleeved on the rotating rod (10). One end of the torsion spring (12) is fixedly connected to the inner wall of the fixed frame (13). The other end of the torsion spring (12) is fixedly connected to the outer wall of the rotating block (11). A water storage tray (16) is fixedly connected to the outer wall of the fixed frame (13). A plurality of evenly distributed spray heads (17) are fixedly connected to the outer wall of the water storage tray (16).

7. The detection device for flexographic printing packaging bags according to claim 6, characterized in that: A rotating ring (14) is rotatably installed on the outer wall of the water storage pan (16). The rotating ring (14) is connected to the inner wall of the water storage pan (16). A water supply pipe (15) is fixedly connected to the outer wall of the rotating ring (14).

8. The detection device for flexographic printing packaging bags according to claim 7, characterized in that: The outer wall of the water storage pan (16) is fixedly connected to a first guide rod (18), and the end of the first guide rod (18) is rotatably mounted with a first ball bearing (19). The outer wall of the transmission motor (8) is fixedly connected to a plurality of first contact blocks (20), and the first contact blocks (20) are configured as spherical blocks.

9. The detection device for flexographic printing packaging bags according to claim 1, characterized in that: The outer wall of the detection device base (1) is fixedly equipped with a control button (2), the outer wall of the tracked conveyor belt (4) is fixedly connected with a bracket (3), and the movable placement frame (7) is fixedly connected to the movable end of the tracked conveyor belt (4).

10. A method of using a testing device for flexographic printing packaging bags, as described in any one of claims 1-9, characterized in that... Includes the following steps: S1. Place the packaging bag to be tested into the mobile placement box (7) for clamping and fixing, and then start the tracked conveyor belt (4). The tracked conveyor belt (4) moves and carries the packaging bag clamped in the mobile placement box (7) into the testing stage. S2. During detection, the sensor takes a wide-angle picture of the packaging bag and performs visual inspection on the printed material on the surface of the packaging bag. S3. During the transportation of the packaging bag, the clamping frame (34) adjusts the orientation of the packaging bag to make the detection angle more comprehensive and the accuracy higher. S4. After conducting a comprehensive spray test on the packaging bag to test its printing quality after contact with water, the bag is then photographed and identified. After the spray test is completed, the packaging bag is flipped over and a new round of intelligent visual inspection is performed on the back of the packaging bag.

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