Wine packaging box surface printing quality detection device

Abstract

The invention relates to the technical field of packaging box quality detection, in particular to a wine packaging box surface printing quality detection device which comprises a workbench, a conveyor and a computer, the conveyor is installed on the upper surface of the workbench and conveys a packaging box from left to right, and the computer is installed on the front side of the upper surface of the workbench. A plurality of printing quality recognition mechanisms are installed on the rear side of the upper surface of the workbench from left to right, packaging box printing images are extracted through the printing quality recognition mechanisms, the surface flatness is tested, and a discharging mechanism is installed at the right end of the bottom of the workbench. The full coverage of the printing quality of the packaging box is ensured, manual intervention is reduced, errors caused by manual operation are avoided, the detection accuracy is remarkably improved, the process of multiple times of detection of traditional equipment is omitted, manpower and material resources are saved, the detection efficiency is greatly improved, and the efficient and accurate quality control requirement is met.

Description

Technical Field

[0001] This invention relates to the field of packaging box quality inspection technology, specifically to a device for inspecting the surface printing quality of wine packaging boxes. Background Technology

[0002] Wine packaging boxes play multiple crucial roles in the wine industry chain, including protecting wines from damage during transportation and storage, conveying brand image and cultural connotations, and assisting in anti-counterfeiting functions. For high-end wines, the quality of the packaging box is an important factor that indirectly reflects the quality of the wine, and its appearance and craftsmanship directly affect consumers' perception and trust in the product.

[0003] The packaging box manufacturing process involves multiple steps, including cutting, printing, creasing, folding, and assembly. To maintain brand image and ensure consistent product quality, the printing quality of the packaging boxes must be rigorously inspected after completion. Currently, automated visual inspection is the mainstream method, where CCD cameras extract image information from the packaging box surface, and analysis of this information determines whether the printing quality is up to standard.

[0004] However, existing testing equipment has some obvious limitations. First, it mainly tests one side of the packaging box. If multiple sides need to be tested, the orientation of the packaging box needs to be adjusted manually or mechanically, making it difficult to achieve a comprehensive test at once and easily leading to missed detections. Second, it can only test the printing quality and cannot simultaneously complete the test of the flatness of the packaging box surface. It needs to be achieved through multiple testing processes, which not only wastes manpower and resources but also reduces testing efficiency. Summary of the Invention

[0005] The purpose of this invention is to solve the problems of incomplete printing quality inspection and lack of flatness inspection in existing printing methods.

[0006] The present invention achieves the above-mentioned objectives through the following technical solution: a device for detecting the surface printing quality of wine packaging boxes, comprising a workbench, a conveyor, and a computer. The conveyor is installed on the upper surface of the workbench and transports the packaging boxes from left to right. The computer is installed on the front side of the upper surface of the workbench for identifying the printing quality of the packaging boxes. Several printing quality identification mechanisms are installed from left to right on the rear side of the upper surface of the workbench to extract the printing images of the packaging boxes and test the surface flatness. A feeding mechanism is installed at the bottom right end of the workbench to sort the packaging boxes. The printing quality identification mechanism includes a support, a rotating component, and an image extraction component. The support is installed on the rear side of the worktable surface, the rotating component is installed on the upper surface of the support, and the image extraction component is installed at the output end of the rotating component. The rotating component drives the image extraction component to rotate intermittently, allowing the image extraction component to extract the printed patterns on the four sides of the packaging box.

[0007] Specifically, the rotating assembly includes a housing mounted on the upper surface of the bracket. A first motor electrically connected to a computer is mounted on the upper surface of the housing. A disk is mounted on the output end of the first motor. A notched dial that rotates coaxially is mounted on the lower surface of the disk. A cylindrical pin is mounted on the lower surface of the disk at a position opposite to the notch of the notched dial. A rotating shaft is mounted on the right side of the inner cavity of the housing via a bearing. A grooved wheel and a rotating rod are respectively mounted on the upper and lower ends of the outer wall of the rotating shaft. When the notched dial contacts the grooved wheel, the grooved wheel is braked. When the notched dial engages with the grooved wheel, the grooved wheel is stationary. When the cylindrical pin enters the grooved wheel, it drives the grooved wheel to rotate. As the dial continues to rotate, the shaft rotates intermittently.

[0008] Specifically, the grooved wheel has four grooves that are 90 degrees apart.

[0009] Specifically, the axis of the rotating shaft is on the same straight line as the center line of the conveyor.

[0010] Specifically, the image extraction component includes a base plate vertically mounted on the other end of a rotating rod. A CCD camera electrically connected to a computer is mounted at the center of the base plate. The CCD camera takes pictures of the packaging box and transmits the image information to the computer. Sprockets are mounted on both the upper and lower ends of the inner cavity of the base plate via pins. A second motor electrically connected to the computer is mounted on the rear side of the base plate, and the second motor can drive the sprockets to rotate. A chain is connected to the outer wall of the sprockets. A flatness testing unit is mounted on the front side of the inner cavity of the base plate. The flatness testing unit is driven to move via a chain.

[0011] Specifically, the flatness testing unit includes two slide rods vertically installed on the left and right sides of the inner cavity of the substrate. A lifting plate is sleeved on the outer wall of the slide rod. A slide rail is opened horizontally in the center of the lifting plate. A slider connected to the chain via a pin is inserted into the inner cavity of the slide rail. A rangefinder electrically connected to a computer is installed on the front of the lifting plate. The slider moves along a chain track, dragging the lifting plate up and down to check the flatness of the packaging box.

[0012] Specifically, the lifting plate is located in front of the CCD camera.

[0013] Specifically, the distance the slider slides within the track is greater than the width of the chain.

[0014] The beneficial effects of this invention are: 1. This invention uses a first motor to drive a disc, which in turn drives a notched dial and a cylindrical pin to rotate synchronously. By utilizing the meshing braking characteristics of the notched dial and the grooved wheel, and in conjunction with the intermittent actuation of the grooved wheel by the cylindrical pin, the rotating rod rotates intermittently. This causes the printing quality identification mechanism to sequentially align with the four sides of the packaging box for inspection, ensuring comprehensive coverage of the printing quality of the packaging box, reducing manual intervention, avoiding errors caused by human operation, and significantly improving the accuracy of inspection.

[0015] 2. By capturing images of the packaging box surface using a CCD camera, accurate detection of printed patterns is achieved. Simultaneously, a second motor drives a sprocket to rotate, and a chain pulls a slider to move a lifting plate up and down along a slide bar. In conjunction with a rangefinder, distances are measured at multiple points on the packaging box surface. Flatness is determined by changes in the distance. This eliminates the need for multiple inspections required by traditional equipment, saving manpower and resources, significantly improving inspection efficiency, and meeting the requirements for efficient and accurate quality control. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the printing quality identification mechanism of the present invention; Figure 3 Exploded view of the rotating component; Figure 4 This is a bottom-view cross-sectional view of the rotating component; Figure 5 This is a schematic diagram of the image extraction component structure; Figure 6 Exploded view of the image extraction component; Figure 7 for Figure 6 Enlarged view of point A in the middle; Figure 8 This is a schematic diagram of the feeding mechanism.

[0017] In the diagram: 1. Workbench; 2. Conveyor; 3. Computer; 4. Printing quality identification mechanism; 5. Unloading mechanism; 41. Support; 42. Rotating component; 43. Image extraction component; 421. Box body; 422. First motor; 423. Disc; 424. Notched dial; 425. Cylindrical pin; 426. Shaft; 427. Grooved wheel; 428. Rotating rod; 431. Base plate; 432. CCD camera; 433. Sprocket; 434. Second motor; 435. Chain; 436. Flatness testing unit; 4361. Slide bar; 4362. Lifting plate; 4363. Slide rail; 4364. Slider; 4365. Rangefinder; 51. Support plate; 52. Third motor; 53. Guide plate. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of the present invention easier to understand, the preferred embodiments of the present invention are further described below in conjunction with specific embodiments and accompanying drawings.

[0019] Please see Figure 1-8 This invention provides a device for detecting the printing quality of wine packaging boxes, including a workbench 1, a conveyor 2, and a computer 3. The conveyor 2 is installed on the upper surface of the workbench 1 and transports the packaging boxes from left to right. The computer 3 is installed on the front side of the upper surface of the workbench 1 and is used to identify the printing quality of the packaging boxes. The computer 3 is also equipped with a PLC controller for controlling the start and stop of the printing quality identification mechanism 4 and the unloading mechanism 5. Several printing quality identification mechanisms 4 are installed from left to right on the rear side of the upper surface of the workbench 1. The printing quality identification mechanism 4 extracts the printing image of the packaging box and tests the surface flatness. The unloading mechanism 5 is installed at the bottom right end of the workbench 1 to sort the packaging boxes. The printing quality identification mechanism 4 includes a support 41, a rotating component 42, and an image extraction component 43. The support 41 is installed on the rear side of the upper surface of the worktable 1, the rotating component 42 is installed on the upper surface of the support 41, and the image extraction component 43 is installed at the output end of the rotating component 42. The rotating component 42 drives the image extraction component 43 to rotate intermittently, so that the image extraction component 43 can extract the printed pattern on the surface of the packaging box.

[0020] As a preferred embodiment, the rotating assembly 42 further includes a box 421 mounted on the upper surface of the bracket 41. A first motor 422 electrically connected to the computer 3 is mounted on the upper surface of the box 421. A disc 423 is mounted on the output end of the first motor 422. A notched dial 424 with coaxial rotation is mounted on the lower surface of the disc 423. A cylinder 425 is mounted on the lower surface of the disc 423 at a position opposite to the notch of the notched dial 424. A rotating shaft 426 is mounted on the right side of the inner cavity of the box 421 via a bearing. The axis of the rotating shaft 426 is collinear with the centerline of the conveyor 2, allowing the printing quality identification mechanism 4 to rotate with the center of the packaging box as the center. To avoid missed detections due to excessive changes in the distance between the packaging box and the printing quality identification mechanism 4, the upper and lower ends of the outer wall of the rotating shaft 426 are respectively equipped with a grooved wheel 427 and one end of the rotating rod 428. When the notched dial 424 contacts the grooved wheel 427, it brakes the grooved wheel 427. The grooved wheel 427 has four grooves that are 90 degrees apart. When the cylindrical pin 425 moves the grooved wheel 427, it can rotate 90 degrees each time. Through the cooperation between the cylindrical pin 425 and the grooved wheel 427, the image extraction component 43 moves intermittently, so that the image extraction component 43 can sequentially detect the four sides of the packaging box, avoiding missed detections and ensuring the stability and accuracy of the detection process.

[0021] The working process of the rotating component 42: When the computer 3 issues a detection command, the first motor 422 starts and drives the disc 423 to rotate. The disc 423 synchronously drives the notched dial 424 and the cylindrical pin 425 to rotate. When the arc-shaped surface of the notched dial 424 contacts the outer circular surface of the grooved wheel 427, the grooved wheel 427 is braked. At this time, the image extraction component 43 remains stationary and can stably extract the printed image of the current side of the packaging box. As the disc 423 continues to rotate, when the notch of the notched dial 424 is opposite to the grooved wheel 427, the cylindrical pin 425 enters the groove of the grooved wheel 427. Under the action of the cylindrical pin 425, the grooved wheel 427 drives the rotating shaft 426 and the rotating rod 428 to rotate 90 degrees. After that, the disc 423 continues to rotate, the notched dial 424 contacts the grooved wheel 427 again, the grooved wheel 427 is braked, the image extraction component 43 is stationary and extracts the printed image of the next side of the packaging box. Through the above cycle, the image extraction component 43 sequentially detects the four sides of the packaging box, avoiding missed detections and ensuring the stability and accuracy of the detection process.

[0022] As a preferred embodiment, the image extraction component 43 further includes a substrate 431 vertically mounted on the other end of the rotating rod 428. A CCD camera 432 electrically connected to the computer 3 is mounted at the center of the substrate 431. The CCD camera 432 takes a picture of the packaging box and transmits the image information to the computer 3. The computer 3 compares the standard pattern with the pattern in the image to determine the printing quality of the packaging box. Sprockets 433 are mounted on both the upper and lower ends of the inner cavity of the substrate 431 via pins. A second motor 434 electrically connected to the computer 3 is mounted on the rear side of the substrate 431, and the second motor 434 can drive the sprockets 433 to rotate. A chain 435 is chained to the outer wall of the sprockets 433. A flatness testing unit 436 is mounted on the front side of the inner cavity of the substrate 431. The CCD camera 432 is used for printing quality inspection of the packaging box. Through the transmission of the sprockets 433 and the chain 435, it provides driving force to the flatness testing unit 436 to measure the distance of the packaging box, achieving the dual purpose of printing quality and flatness inspection.

[0023] The working process of the image extraction component 43 is as follows: When the rotating component 42 drives the substrate 431 to rotate and align with a certain side of the packaging box, the CCD camera 432 is activated, captures the printed image of that side and transmits it to the computer 3. The image analysis module of the computer 3 compares the captured image with the standard image to determine whether the printing quality is qualified, such as whether there are problems such as missing colors, misregistration, or blurred text. At the same time, the second motor 434 is activated, driving the sprocket 433 to rotate, and the chain 435 moves in a cycle. The chain 435 drives the slider 4364 to slide in the slide rail 4363, thereby pulling the lifting plate 4362 to slide up and down along the slide rod 4361. The lifting plate 4362 drives the rangefinder 4365 to move up and down synchronously. During the movement, the rangefinder 4365 continuously measures the distance to the surface of the packaging box and transmits the distance data to the computer 3. The data processing module of the computer 3 analyzes the distance data. If the fluctuation range of the distance data exceeds the preset flatness standard value, the flatness of the packaging box surface is determined to be unqualified.

[0024] As a preferred embodiment, the flatness testing unit 436 further includes two slide rods 4361 vertically installed on the left and right sides of the inner cavity of the substrate 431. A lifting plate 4362 is sleeved on the outer wall of each slide rod 4361. The lifting plate 4362 is positioned in front of the CCD camera 432 to prevent it from impacting the CCD camera 432 during lifting and lowering, thus protecting the CCD camera 432. A slide rail 4363 is laterally formed in the center of the lifting plate 4362. A slider 4364, connected to the chain 435 via a pin, is inserted into the inner cavity of the slide rail 4363. The slider 4364 slides... The sliding distance within track 4363 is greater than the width of chain 435 to prevent slider 4364 from restricting the movement of chain 435. A rangefinder 4365 electrically connected to computer 3 is installed on the front of lifting plate 4362. The rangefinder 4365 measures the distance between the rangefinder and the surface of the packaging box. If the distance between each point exceeds the flatness standard, it indicates that the flatness of the packaging box is unqualified. The flatness testing unit 436 can efficiently complete the flatness test of the packaging box surface while checking the printing quality. The movement process is stable and will not interfere with other components, further improving the integrated testing capability of the device.

[0025] The flatness testing unit 436 is powered by the second motor 434 in the image extraction component 43, which achieves lifting and lowering motion through the transmission of the chain 435, thereby completing the flatness detection. The specific process is as follows: When computer 3 issues a flatness detection command, the second motor 434 starts and drives the upper sprocket 433 to rotate. The sprocket 433 drives the chain 435 to circulate along the closed trajectory formed by the upper and lower sprockets 433. The slider 4364, which is hinged to the chain 435, moves synchronously with the chain 435. When the chain 435 moves vertically, the slider 4364 remains relatively stationary in the slide rail 4363, directly pulling the lifting plate 4362 to rise or fall vertically along the slide bar 4361. When the chain 435 moves to the arc-shaped turning section of the sprocket 433, the slider 4364 slides laterally along the slide rail 4363 to counteract the lateral displacement of the chain 435, ensuring that the lifting plate 4362 moves only in the vertical direction without any lateral deviation.

[0026] The lifting plate 4362 drives the rangefinder 4365 to move vertically along the surface of the packaging box (in this embodiment, the single detection stroke is 100mm, covering the full height of the side of the packaging box). The rangefinder 4365 continuously measures the real-time distance to the surface of the packaging box at a frequency of 100Hz and transmits the data to the computer 3. The data processing module of computer 3 first sets the flatness standard threshold (e.g., ±0.1mm, which can be adjusted according to the quality requirements of the wine packaging box). After filtering the collected distance data to remove interference signals, the deviation between each measurement point and the reference distance (i.e., the distance from the theoretical plane of the packaging box surface to the rangefinder) is calculated. If the deviation values ​​of all measurement points are within the standard threshold range, the flatness of the packaging box surface is deemed to be qualified; if the deviation value of any measurement point exceeds the standard threshold (i.e., the spacing fluctuation exceeds the standard), the flatness is deemed to be unqualified, and the coordinates of the unqualified point are recorded for subsequent quality traceability.

[0027] The flatness testing unit 436 operates synchronously with the printing image acquisition process of the CCD camera 432: when the rotating component 42 drives the image extraction component 43 to stand still and align with a certain side of the packaging box, the CCD camera 432 captures the printing image of that side, and at the same time, the rangefinder 4365 starts the lifting detection. The detection data of both are transmitted synchronously to the computer 3, realizing "one-time positioning, dual detection", without the need for additional detection procedures, and greatly improving detection efficiency.

[0028] As a preferred embodiment, the feeding mechanism 5 further includes a support plate 51, a third motor 52, and a guide plate 53. The support plate 51 is installed on the right end of the lower surface of the workbench 1, the third motor 52 is installed on the lower surface of the support plate 51, and the third motor 52 is electrically connected to the computer 3. The output end of the third motor 52 is equipped with the guide plate 53. The guide plate 53 is pulled back and forth by the third motor 52 to change the feeding position and separate the packaging boxes of different qualities.

[0029] Working principle: Step 1: After the packaging box is printed, it is transferred to conveyor 2. Conveyor 2 transports the packaging box from left to right to the test location. Step two: The first motor 422 drives the disc 423 to rotate, and the notched dial 424 and the cylindrical pin 425 rotate synchronously. When the notched dial 424 contacts the grooved wheel 427, the grooved wheel 427 is stationary. When the notched dial 424 disengages from the grooved wheel 427, the cylindrical pin 425 enters the grooved wheel 427, causing the grooved wheel 427 to rotate 90 degrees and then separate. The notched dial 424 then contacts the grooved wheel 427, thereby realizing the intermittent rotation of the rotating rod 428, allowing the substrate 431 to rotate intermittently at a rotation angle of 90 degrees. Step 3: CCD camera 432 takes pictures of each side of the packaging box, computer 3 analyzes the image data and tests the printing quality of the packaging box surface. In addition, second motor 434 drives sprocket 433 to rotate, so that chain 435 pulls slider 4364 to move. Under the movement of slider 4364, lifting plate 4362 can move up and down along slide bar 4361. Rangefinder 4365 measures the distance between each point on the surface of packaging box. Once the distance fluctuates, it indicates that the surface of packaging box is uneven. Step four: The third motor 52 can drive the guide plate 53 to swing back and forth, adjust the feeding position, and separate the packaging boxes of different qualities.

[0030] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A device for inspecting the printing quality of wine packaging boxes, comprising a workbench (1), a conveyor (2), and a computer (3), wherein the conveyor (2) is installed on the upper surface of the workbench (1) and conveys the packaging boxes from left to right; the computer (3) is installed on the front side of the upper surface of the workbench (1) for identifying the printing quality of the packaging boxes, characterized in that, The workbench (1) has several printing quality identification mechanisms (4) installed from left to right on the rear side of the upper surface. The printing quality identification mechanism (4) extracts the printed image of the packaging box and tests the surface flatness. The workbench (1) has a feeding mechanism (5) installed at the bottom right end to sort the packaging boxes. The printing quality identification mechanism (4) includes a support (41), a rotating component (42), and an image extraction component (43). The support (41) is installed on the rear side of the upper surface of the workbench (1). The rotating component (42) is installed on the upper surface of the support (41). The image extraction component (43) is installed at the output end of the rotating component (42). The rotating component (42) drives the image extraction component (43) to rotate intermittently, so that the image extraction component (43) can extract the printed pattern on the surface of the packaging box.

2. The device for detecting the surface printing quality of wine packaging boxes according to claim 1, characterized in that, The rotating assembly (42) includes a housing (421) mounted on the upper surface of the bracket (41). A first motor (422) electrically connected to the computer (3) is mounted on the upper surface of the housing (421). A disc (423) is mounted on the output end of the first motor (422). A notched dial (424) that rotates coaxially is mounted on the lower surface of the disc (423). A cylindrical pin (425) is mounted on the lower surface of the disc (423) at a position opposite to the notch of the notched dial (424). A rotating shaft (426) is mounted on the right side of the inner cavity of the housing (421) via a bearing. A grooved wheel (427) and one end of a rotating rod (428) are respectively mounted on the upper and lower ends of the outer wall of the rotating shaft (426). When the notched dial (424) contacts the grooved wheel (427), the grooved wheel (427) is braked.

3. The device for detecting the surface printing quality of wine packaging boxes according to claim 2, characterized in that, The grooved wheel (427) has four grooves that are 90 degrees apart.

4. The device for detecting the surface printing quality of wine packaging boxes according to claim 3, characterized in that, The axis of the rotating shaft (426) is on the same straight line as the center line of the conveyor (2).

5. The device for detecting the surface printing quality of wine packaging boxes according to claim 4, characterized in that, The image extraction component (43) includes a base plate (431) vertically mounted on the other end of a rotating rod (428). A CCD camera (432) electrically connected to a computer (3) is mounted at the center of the base plate (431). The CCD camera (432) takes pictures of the packaging box and transmits the image information to the computer (3). Sprockets (433) are mounted on both the upper and lower ends of the inner cavity of the base plate (431) via pins. A second motor (434) electrically connected to the computer (3) is mounted on the rear side of the base plate (431), and the second motor (434) can drive the sprockets (433) to rotate. A chain (435) is connected to the outer wall of the sprockets (433). A flatness testing unit (436) is mounted on the front side of the inner cavity of the base plate (431).

6. The device for detecting the surface printing quality of wine packaging boxes according to claim 5, characterized in that, The flatness testing unit (436) includes two slide rods (4361) vertically installed on the left and right sides of the inner cavity of the substrate (431). A lifting plate (4362) is sleeved on the outer wall of the slide rod (4361). A slide rail (4363) is opened horizontally in the center of the lifting plate (4362). A slider (4364) connected to the chain (435) via a pin is inserted into the inner cavity of the slide rail (4363). A rangefinder (4365) electrically connected to the computer (3) is installed on the front of the lifting plate (4362).

7. The device for detecting the surface printing quality of wine packaging boxes according to claim 6, characterized in that, The lifting plate (4362) is located in front of the CCD camera (432).

8. The device for detecting the surface printing quality of wine packaging boxes according to claim 7, characterized in that, The distance that the slider (4364) slides within the slide rail (4363) is greater than the width of the chain (435).

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