A packaging paper printing detection device

Abstract

The application discloses a kind of packaging paper printing detection device, it is related to packaging paper printing field, it includes conveying belt, the surface side of conveying belt is fixedly connected with support frame, the inboard of support frame is fixedly connected with auxiliary plate, the outside of support frame and auxiliary plate is provided with adjusting assembly for preventing printing shadow from affecting detection result, the detection height of defect detection equipment is realized by motor drive ball screw rotation to make ball screw slide in the inside of limiting groove, to adapt to different sizes of packaging paper and printing size, when ball screw adjusts the height of defect detection equipment, the angle of light supplementing lamp is automatically synchronous deflection, real-time optimization incident light direction, eliminate local shadow, for example, when detecting edge raised area, light supplementing lamp is automatically pressed down, to low angle side light fills in recessed place shadow, so that surface texture is clearly visible.

Description

Technical Field

[0001] This application relates to the field of packaging paper printing, and in particular to a packaging paper printing inspection device. Background Technology

[0002] Packaging paper printing inspection equipment is a device that uses machine vision technology to automatically control the quality of printed packaging paper. The printing press transfers the designed pattern onto the packaging material using gravure, flexographic or digital printing technology. During the process, it is necessary to precisely control the ink color, registration accuracy and drying parameters. Subsequently, the inspection device uses a high-resolution industrial camera to capture images of the printed surface and combines AI algorithms to analyze defects such as color deviation, registration error, stains or scratches, and sorts good products from defective products in real time.

[0003] With the diversification of packaging materials (such as metal foil, matte paper, transparent film, etc.) and the increasing complexity of printing processes (such as 3D hot stamping, UV spot varnishing), existing fixed light source inspection equipment can hardly meet the requirements of high precision and high efficiency quality control. Especially when there are thickness differences in packaging paper (such as edge indentations, ink accumulation, or uneven material lamination), local shadows will cause blind spots in the inspection, significantly reducing the defect detection rate. Utility Model Content

[0004] To address the issue of blind spots caused by shadows resulting from printing thickness, this application provides a packaging paper printing inspection device.

[0005] The packaging paper printing inspection device provided in this application adopts the following technical solution:

[0006] A packaging paper printing inspection device includes a conveyor belt, a support frame fixedly connected to one side of the surface of the conveyor belt, an auxiliary plate fixedly connected to the inner side of the support frame, and an adjustment component for preventing printing shadows from affecting the inspection results provided on the outside of the support frame and the auxiliary plate.

[0007] By adopting the above technical solution, the height of the detection equipment can be automatically adjusted by adjusting the components, reducing manual intervention and improving adjustment efficiency. When adjusting the height of the defect detection equipment, the angle of the supplementary light automatically and synchronously deflects, achieving automatic matching of the optimal illumination angle at different heights.

[0008] Preferably, the adjustment assembly includes a ball screw with both ends rotatably connected to the support frame and the auxiliary plate respectively. One end of the ball screw located inside the auxiliary plate is fixedly connected to an anti-shifting column rotatably connected to the auxiliary plate. The outside of the ball screw is symmetrically fixedly connected to a fixing column that slidably connects to the auxiliary plate. A defect detection device is fixedly connected to one side of the surface of the fixing column.

[0009] By adopting the above technical solution, the cooperation between the ball screw and the limiting groove converts the rotational motion into the linear motion of the fixed column, ensuring the stable lifting and lowering of the testing equipment.

[0010] Preferably, the ball screw is externally fixedly connected to a limiting post that is fixedly connected to the outer surface of the moving column, and a fixing plate is fixedly connected between the auxiliary plate and the surface of the support frame. A limiting groove that is slidably connected to the limiting post is provided on one side of the surface of the fixing plate.

[0011] By adopting the above technical solution, the sliding fit between the limiting post and the limiting groove restricts the stroke of the ball screw, improves the linear motion accuracy of the fixed post, and reduces the impact of shaking on the detection.

[0012] Preferably, a motor is fixedly connected to one side of the surface of the support frame, and the drive end of the motor is fixedly connected to one end of the ball screw located inside the support frame.

[0013] By adopting the above technical solution, the moving speed of the detection equipment can be precisely adjusted by controlling the motor speed to adapt to different detection rhythm requirements.

[0014] Preferably, a fixing block is fixedly connected to one side of the surface of the defect detection device, and an auxiliary groove is opened on one side of the surface of the fixing block. A second cylinder and a first cylinder passing through the auxiliary groove are rotatably connected inside the fixing block, and a supplementary light is fixedly connected to the outer surface of the first cylinder located in the auxiliary groove.

[0015] By adopting the above technical solution, the light moves synchronously with the detection equipment, ensuring that the illumination angle always matches the detection position and eliminating shadow interference.

[0016] Preferably, the support frame has a first sliding groove and a second sliding groove that are parallel to each other on both sides, and a first cylinder and a second cylinder are slidably connected inside the first sliding groove and the second sliding groove, respectively.

[0017] By adopting the above technical solution, the first slide groove and the second slide groove are arranged in parallel to ensure that the first cylinder and the second cylinder move downward synchronously.

[0018] Preferably, a first gear is fixedly connected to one side of the surface of the second cylinder, and a rack fixedly connected to the inner wall of the support frame is meshed with the outer side of the first gear.

[0019] By adopting the above technical solution, the rack is used to make the first gear rotate, thereby realizing the angle adjustment of the supplementary light.

[0020] Preferably, a third gear is fixedly connected to the end of the second cylinder away from the first gear, and the outer side of the third gear is meshed with a second gear fixedly connected to one side of the surface of the first cylinder.

[0021] By adopting the above technical solution, the first gear, the second gear, and the third gear realize the conversion of the long distance of the supplementary light following the up and down movement of the defect detection equipment into a small deflection of the supplementary light.

[0022] Preferably, the first gear, the second gear, and the third gear are all located inside the support frame.

[0023] By adopting the above technical solution, the support frame is used to prevent the first gear, the second gear and the third gear from being disturbed by external forces.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. By driving the ball screw to rotate via a motor, the ball screw slides inside the limiting groove, thereby adjusting the detection height of the defect detection equipment to accommodate different sizes of packaging paper and printing sizes.

[0026] 2. When the ball screw adjusts the height of the defect detection equipment, the angle of the supplementary light automatically deflects synchronously, optimizing the incident light direction in real time and eliminating local shadows. For example, when detecting raised areas on the edge, the supplementary light automatically presses down to fill the shadows in the depressions with low-angle side light, making the surface texture clearly visible. This achieves automatic matching of the best lighting angle at different heights and improves color reproduction. Attached Figure Description

[0027] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this application;

[0028] Figure 2 This is a schematic diagram of the adjustment component structure of this application;

[0029] Figure 3 This is a side view of the adjustment component of this application;

[0030] Figure 4 This is a schematic diagram of the rack position structure in this application;

[0031] Figure 5 This is a partial structural diagram of the adjustment component of this application.

[0032] Reference numerals: 1. Conveyor belt; 2. Support frame; 3. Auxiliary plate;

[0033] 4. Adjustment assembly; 41. Ball screw; 42. Anti-shifting column; 43. Fixing column; 44. Limiting column; 45. Fixing plate; 46. Limiting groove; 47. Motor;

[0034] 48. Defect detection equipment; 49. First chute; 410. Second chute; 411. Fixing block; 412. Auxiliary groove; 413. First cylinder; 414. Second cylinder;

[0035] 415. First gear; 416. Rack; 417. Second gear; 418. Third gear; 419. Fill light. Detailed Implementation

[0036] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail.

[0037] This application discloses a packaging paper printing inspection device.

[0038] Reference Figure 1 , Figure 2 A packaging paper printing inspection device includes a conveyor belt 1. The middle of the two supports at both ends of the upper surface of the conveyor belt 1 is fixedly connected to the bottom of the support frame 2. The inner side of both ends of the support frame 2 and the surface between the upper parts are fixedly connected to both ends of the auxiliary plate 3. An adjustment component 4 is provided on the outside of the support frame 2 and the auxiliary plate 3. The adjustment component 4 is used to prevent the printing thickness from causing shadows and resulting in blind spots in the inspection.

[0039] The printed packaging paper is conveyed to the bottom of the defect detection device 48 via conveyor belt 1. The defect detection device 48 captures images of the printed surface and analyzes defects such as color deviation, registration error, stains or scratches using AI algorithms. Good products and defective products are sorted in real time. Through synchronous light source and high-speed image processing, the stability and consistency of printing quality are ensured.

[0040] Reference Figure 3 , Figure 2The adjusting assembly 4 includes a ball screw 41 with both ends rotatably connected to the support frame 2 and the auxiliary plate 3 respectively. The ball screw 41 consists of a screw shaft and a nut seat. The bottom of the screw shaft of the ball screw 41 is fixedly connected to an anti-shift post 42. The anti-shift post 42 is located inside the auxiliary plate 3 and rotatably connected to the auxiliary plate 3. The anti-shift post 42 has one side larger than the size of the screw shaft of the ball screw 41, so that the ball screw 41 is restricted from moving up and down when rotating. The outer surfaces of the nut seat of the ball screw 41 are fixedly connected to two fixed posts 43 on both sides, and the two fixed posts 43 are slidably connected inside the auxiliary plate 3. One side of the surface of the fixed post 43 is fixedly connected to the mounting end of the defect detection device 48. The defect detection device 48 is mounted on the fixed post 43. 3. The camera part of the defect detection device 48 is positioned away from the motor 47 and is perpendicular to the top of the conveyor belt 1, so that it can directly illuminate the printed area of ​​the packaging paper. The outer surface of the nut seat of the ball screw 41 is fixedly connected to the limiting post 44. The inner top surface of the auxiliary plate 3 and the upper surface of the support frame 2 are respectively fixedly connected to the top and bottom of the fixed plate 45. A limiting groove 46 is opened on the side of the fixed plate 45 near the ball screw 41. The end of the limiting post 44 away from the ball screw 41 slides inside the limiting groove 46. The limiting groove 46 is vertical and restricts the movement direction of the fixed post 43, so that the fixed post 43 can only move up and down. The middle part of the upper surface of the support frame 2 is connected to the fixed end of the motor 47. The drive end of the motor 47 is fixedly connected to the top of the ball screw 41 through a coupling.

[0041] When the size of the printed packaging paper changes, the height of the defect detection equipment 48 needs to be adjusted to improve the accuracy and adaptability of the detection. The operator starts the motor 47 through the controller, which drives the ball screw 41 to rotate. The rotation of the ball screw 41 causes the limiting post 44 to slide inside the limiting groove 46. The rotation of the ball screw 41 drives the limiting post 44 downward along the limiting groove 46. The movement of the limiting post 44 drives the fixed post 43 to move. The movement of the fixed post 43 drives the defect detection equipment 48 to adjust its height, thus achieving automated and high-precision height adjustment.

[0042] Reference Figure 4The defect detection device 48 is fixedly connected to the surface of the fixing block 411 on the side near the fixing plate 45. An auxiliary groove 412 is provided on the side of the fixing block 411 away from the defect detection device 48. The auxiliary groove 412 is used to prevent the fixing block 411 from restricting the rotation direction of the supplementary light 419. A first cylinder 413 and a second cylinder 414 are rotatably connected through the interior of the fixing block 411. The first cylinder 413 extends into the interior of the auxiliary groove 412. A mounting base is provided on the outer surface of the first cylinder 413. The outer surface of the first cylinder 413 is mounted to the fixed end of the supplementary light 419 via the mounting base. The supplementary light 419 is mounted on the first cylinder 413. The surface located inside the auxiliary groove 412 is illuminated by the supplementary light 419 in its initial state to the surface of the packaging paper inspected by the defect detection device 48. The support frame 2 has a first slide groove 49 and a second slide groove 410 on both sides. The first slide groove 49 and the second slide groove 410 penetrate the inner side of the support frame 2 and are parallel to each other. The interior of the first slide groove 49 is slidably and rotatably connected to the first cylinder 413, and the interior of the second slide groove 410 is slidably and rotatably connected to the second cylinder 414. In this way, the first cylinder 413 and the second cylinder 414 move up and down and rotate during the height adjustment process of the defect detection device 48.

[0043] As the defect detection device 48 moves up and down to adjust its height, it also drives the fixed block 411 to move up and down. When the fixed block 411 moves up and down, it can drive the supplementary light 419 to move up and down. Since the supplementary light 419 also needs to change a certain angle after the defect detection device 48 adjusts its height, it can still keep illuminating the surface irradiated by the defect detection device 48. When the fixed block 411 moves, it drives the first cylinder 413 and the second cylinder 414 to slide inside the first slide groove 49 and the second slide groove 410.

[0044] Reference Figure 5 , Figure 4 One end of the second cylinder 414 located inside the support frame 2 is fixedly connected to the first gear 415, and the other end of the second cylinder 414 located inside the support frame 2 is fixedly connected to the third gear 418. The inner wall of the support frame 2 is fixedly connected to the side of the rack 416 near the fixed block 411. The first gear 415 is meshed with the rack 416. In this way, when the first gear 415 moves, it rolls on the surface of the rack 416, thereby driving the first gear 415 to rotate. The side of the third gear 418 near the first slide groove 49 is meshed with the outer side of the second gear 417. The center of the second gear 417 is fixedly connected to one end of the first cylinder 413 located inside the support frame 2.

[0045] During the up-and-down movement of the first cylinder 413 and the second cylinder 414, the second gear 417, the first gear 415, and the third gear 418 are driven to move up and down. When the first gear 415 moves, it rotates by meshing with the rack 416. The rotation of the first gear 415 drives the second cylinder 414 to rotate. The rotation of the second cylinder 414 drives the third gear 418 to rotate. The rotation of the third gear 418 drives the second gear 417 to rotate. When the supplementary light 419 moves downward, the second gear 417, through the third gear 418, causes the supplementary light 419 to rotate towards the defect detection equipment 48. When the supplementary light 419 moves upward, the second gear 417, through the third gear 418, causes the supplementary light 419 to rotate away from the defect detection equipment 48.

[0046] It should be noted that the number of gears in the second gear 417 and the first gear 415 is at least twice the number of gears in the third gear 418. The number of teeth in the rack 416 is set according to the moving distance of the defect detection device 48. The tooth sizes of the first gear 415, rack 416, second gear 417, and third gear 418 are all equal. This is so that the long distance that the supplementary light 419 moves up and down with the defect detection device 48 can be converted into a small deflection of the supplementary light 419.

[0047] Among them, the motor 47, the defect detection device 48, and the supplementary light 419 are all existing technologies, and their structural principles will not be described in detail. The motor 47 is specifically a self-locking geared motor 47, such as the JGY-370 worm gear reducer motor 47. The defect detection device 48 is specifically a Keyence CA series image sensor. The supplementary light 419 is specifically an LED supplementary light 419. The power cord of the defect detection device 48 is connected to an external power supply. The length of the power cord of the defect detection device 48 is sufficient for the height adjustment of the defect detection device 48. The wire of the supplementary light 419 passes through the center of the first cylinder 413 and is connected to the external power supply. The angle adjustment of the supplementary light 419 will not affect the connection of the wire. The defect detection device 48 and the supplementary light 419 can be used by turning on the power switch. The self-locking geared motor 47 is connected to the driver. The driver receives PWM pulse signals and direction signals from the control module. The power module supplies power to the motor 47 and the driver, and at the same time detects the upper and lower limit positions of the camera movement through limit switches and feeds them back to the controller. Upon startup, the controller sends a pulse sequence based on preset height parameters. The driver converts the signal into rotation of motor 47, which drives ball screw 41 via a coupling, converting the rotational motion into linear lifting and lowering of the defect detection device 48. The electromagnetic brake automatically locks the motor 47 shaft in the event of a power outage to prevent accidental displacement. The entire system achieves ±0.1mm level precision adjustment through closed-loop control and integrates overcurrent protection and emergency stop circuits to ensure safe operation.

[0048] The implementation principle of the packaging paper printing inspection device in this application embodiment is as follows: In the initial state, both the defect detection device 48 and the supplementary light 419 illuminate the packaging paper. The printed packaging paper is conveyed to the area below the defect detection device 48 by the conveyor belt 1. The defect detection device 48 captures the image of the printed surface and analyzes defects such as color deviation, registration error, stains or scratches by combining AI algorithms. Good products and defective products are sorted in real time. After the size of the printed packaging paper is changed, the adjustment personnel control the motor 47 to start through the controller. The motor 47 drives the ball screw 41 to rotate. The rotation of the ball screw 41 slides through the limit post 44 inside the limit groove 46, causing the fixed post 43 to drive the defect detection device 48 to move up and down, thereby adjusting the detection height of the defect detection device 48 to adapt to different sizes of packaging paper and printing sizes.

[0049] Meanwhile, as the defect detection equipment 48 moves up and down, the fixing block 411 drives the supplementary light 419 to follow the up and down movement of the defect detection equipment 48. Since the angle of the supplementary light 419 needs to be changed after the height of the defect detection equipment 48 changes, the fixing block 411 moves up and down, driving the first cylinder 413 and the second cylinder 414 to move. The first cylinder 413 and the second cylinder 414 use the first gear 415, rack 416, second gear 417 and third gear 418 to achieve a small-amplitude adjustment of the angle of the supplementary light 419, so that the angle of the supplementary light 419 can be automatically and synchronously deflected, avoiding repeated manual adjustments. When the ball screw 41 adjusts the height of the defect detection equipment 48, the angle of the supplementary light 419 automatically and synchronously deflects, optimizing the incident light direction in real time and eliminating local shadows. For example, when detecting the raised edge area, the supplementary light 419 automatically presses down, filling the shadow of the depression with low-angle side light, making the surface texture clearly visible, realizing automatic matching of the best lighting angle at different heights and improving color reproduction.

[0050] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A packaging paper printing inspection device, characterized in that: Includes a conveyor belt (1), a support frame (2) is fixedly connected to one side of the surface of the conveyor belt (1), an auxiliary plate (3) is fixedly connected to the inner side of the support frame (2), and an adjustment component (4) is provided on the outside of the support frame (2) and the auxiliary plate (3) to prevent printing shadows from affecting the detection results.

2. The packaging paper printing detection device according to claim 1, characterized in that: The adjustment assembly (4) includes a ball screw (41) with both ends rotatably connected to the support frame (2) and the auxiliary plate (3), respectively. One end of the ball screw (41) located inside the auxiliary plate (3) is fixedly connected to an anti-slip column (42) rotatably connected inside the auxiliary plate (3). A fixed column (43) symmetrically fixedly connected to the outside of the ball screw (41) is slidably connected inside the auxiliary plate (3). A defect detection device (48) is fixedly connected to one side of the surface of the fixed column (43).

3. The packaging paper printing detection device according to claim 2, characterized in that: The ball screw (41) is externally fixedly connected to a limiting post (44), and a fixing plate (45) is fixedly connected between the surface of the auxiliary plate (3) and the support frame (2). A limiting groove (46) that is slidably connected to the limiting post (44) is provided on one side of the surface of the fixing plate (45).

4. The packaging paper printing detection device according to claim 1, characterized in that: A motor (47) is fixedly connected to one side of the surface of the support frame (2), and the driving end of the motor (47) is fixedly connected to one end of the ball screw (41) located inside the support frame (2).

5. The packaging paper printing detection device according to claim 2, characterized in that: A fixing block (411) is fixedly connected to one side of the surface of the defect detection device (48). An auxiliary groove (412) is provided on one side of the surface of the fixing block (411). A second cylinder (414) and a first cylinder (413) are rotatably connected through the inside of the fixing block (411) and through the auxiliary groove (412). A supplementary light (419) is fixedly connected to the outer surface of the first cylinder (413) located in the auxiliary groove (412).

6. The packaging paper printing detection device according to claim 5, characterized in that: The support frame (2) has a first sliding groove (49) and a second sliding groove (410) that are parallel to each other on both sides. The first sliding groove (49) and the second sliding groove (410) are respectively slidably connected to a first cylinder (413) and a second cylinder (414).

7. The packaging paper printing detection device according to claim 6, characterized in that: A first gear (415) is fixedly connected to one side of the surface of the second cylinder (414), and a rack (416) is fixedly connected to the outer side of the first gear (415) and is engaged with the inner wall of the support frame (2).

8. The packaging paper printing detection device according to claim 6, characterized in that: The end of the second cylinder (414) away from the first gear (415) is fixedly connected to a third gear (418), and the outer side of the third gear (418) is meshed with a second gear (417) fixedly connected to one side of the surface of the first cylinder (413).

9. The packaging paper printing detection device according to claim 8, characterized in that: The first gear (415), the second gear (417) and the third gear (418) are all located inside the support frame (2).

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