Milk powder can printing detection equipment

Abstract

The utility model relates to milk powder jar printing detection technical field, concretely is milk powder jar printing detection equipment, including feeding conveying line, unloading conveying line and the printing detection equipment box that is located between it. The carousel module is equipped in the box, and the jar body is grabbed through the uniformly distributed milk powder jar clamping mouth in the circumference, and the jar body 360 degree rotation is driven by the rotation driving wheel with synchronous belt, the high -intensity light source and line sweep camera are arranged in the detection tunnel, and the printing surface image is fully covered and gathered under the jar body rotation state. The equipment solves the curved surface printing blind area detection problem, and the single jar detection period reduces, and the defect identification rate improves, and the compatibility different jar diameter is, and the production line automation level is obviously improved.

Description

Technical Field

[0001] This utility model relates to the field of milk powder can printing inspection technology, specifically milk powder can printing inspection equipment. Background Technology

[0002] As the core packaging carrier for infant formula, the printing quality of the outer wall of the milk powder can directly affects brand image and consumer trust. Currently, the industry generally faces three major technological bottlenecks: Manual visual inspection is inefficient and unreliable; Existing production lines largely rely on workers' visual inspection of curved surface printing effects. Because milk powder cans are cylindrical metal structures (typically ≈200mm in height and ≈100mm in diameter), workers must frequently rotate the cans to inspect different areas, with each can taking ≥8 seconds to inspect, resulting in an average efficiency of less than 200 cans per hour. More seriously, visual fatigue from continuous work can cause the missed inspection rate to climb to over 5% (actual measured data), making it particularly difficult to detect defects such as localized color differences, broken character lines, or misregistration ≤0.3mm², posing a risk of misreading food safety labels.

[0003] Automated inspection equipment has inherent blind spots; some companies use fixed CCD camera inspection solutions, but these are limited by the camera's field of view and the tank's curvature. When the camera is shooting vertically, the top / bottom edge area of ​​the tank forms a visual blind spot of ≥15% due to light obstruction. While a multi-camera ring layout can reduce blind spots, it requires the collaboration of more than eight 20-megapixel cameras, resulting in high hardware costs and complex multi-source image stitching algorithms with a high misjudgment rate.

[0004] Poor coordination between different stages of the production line; spraying, printing, and testing processes are usually completed by independent equipment. The can body needs to undergo at least three positioning-clamping-release processes.

[0005] Therefore, in view of the above-mentioned problems, this technical solution proposes a milk powder can printing inspection device. Utility Model Content

[0006] The purpose of this invention is to provide a milk powder can printing inspection device to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: The milk powder can printing inspection equipment includes a feeding conveyor line, a discharging conveyor line, and a printing inspection equipment box. The printing inspection equipment box has an inspection channel in the middle, where the connection between the feeding and discharging conveyors is located. Milk powder cans transported by the feeding and discharging conveyors pass through the inspection channel for printing quality inspection. The inspection channel is equipped with position sensors, a turntable module, and an inspection unit. The turntable module is used for position conversion and rotation of the milk powder cans, transferring them along the path from the output end of the feeding conveyor line, to the inspection unit, and then to the inlet end of the discharging conveyor line, while simultaneously rotating them to perform automated and comprehensive printing quality inspection. Two sets of position sensors are installed at the output end of the feeding conveyor line, the inlet end of the discharging conveyor line, and the connection point with the turntable module, respectively. These sensors automatically determine the distance of the milk powder can from the stop position of the turntable module, and then accurately transfer it between the feeding conveyor line, the turntable module, and the discharging conveyor line.

[0008] As a further embodiment of this utility model: the milk powder can clamping opening is an arc-shaped structure, with clamping rollers symmetrically arranged on both sides of its outer end, and a slide rail for supporting the milk powder can is provided at the bottom of the turntable.

[0009] As a further embodiment of this utility model, the self-rotation drive assembly also includes a self-rotation drive wheel axle connected to the self-rotation drive wheel. The self-rotation drive wheel axle moves through the turntable, and adjacent self-rotation drive wheel axles are connected by a synchronous belt and driven by a drive wheel motor.

[0010] As a further aspect of this invention: lighting is installed inside the detection tunnel.

[0011] As a further embodiment of this utility model, a human-machine interface is provided on one side of the printing inspection equipment box, and the human-machine interface is connected to electrical components.

[0012] Compared with the prior art, the beneficial effects of this utility model are: by rotating the turntable and revolving it, the line scan camera captures 100% of the surface area of ​​the tank, reducing the blind zone rate to 0, and at the same time, the automated transfer detection greatly improves the detection efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a milk powder can printing inspection equipment.

[0014] Figure 2 This is a schematic diagram of the structure of the printing inspection equipment box in the milk powder can printing inspection equipment when the top is unfolded.

[0015] Figure 3 This is a schematic diagram of the rotary module in a milk powder can printing and testing equipment.

[0016] The components include: 10 feeding conveyor line, 11 unloading conveyor line, 12 printing inspection equipment box, 13 human-machine interface, 14 position sensor, 15 turntable module, 16 line scan camera, 17 inspection tunnel, 18 turntable drive motor, 19 drive wheel motor, 20 milk powder can clamping port, 21 self-rotating drive wheel, 22 clamping roller, 23 synchronous belt, 24 self-rotating drive wheel shaft, 25 turntable, and 26 support frame. Detailed Implementation

[0017] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0018] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] Please see Figures 1-3The milk powder can printing inspection equipment includes a feeding conveyor line 10, a discharging conveyor line 11, and a printing inspection equipment box 12. An inspection channel is provided in the middle of the printing inspection equipment box 12. The connection between the feeding conveyor line 10 and the discharging conveyor line 11 is located within the inspection channel. Milk powder cans transported by the feeding conveyor line 10 and the discharging conveyor line 11 undergo printing quality inspection within the inspection channel. The inspection channel is equipped with a position sensor 14, a turntable module 15, and an inspection unit. The turntable module 15 is used for position switching and rotation of the milk powder cans. The milk powder can is transferred along the path from the output end of the feeding conveyor line 10, the detection unit, and the inlet end of the unloading conveyor line 11, while simultaneously rotating 360° to enable automated and comprehensive printing quality inspection. Two sets of position sensors 14 are installed at the transition connection points between the output end of the feeding conveyor line 10, the inlet end of the unloading conveyor line 11, and the turntable module 15, respectively. These sensors are used to automatically determine the stopping position of the milk powder can from the turntable module 15, and then accurately transfer it between the feeding conveyor line 10, the turntable module 15, and the unloading conveyor line 11. The detection unit includes a line scanning camera 16 and a detection tunnel 17. The detection tunnel 17 is set on one side of the moving path of the feeding conveyor line 10, the turntable module 15, and the unloading conveyor line 11. The line scanning camera 16 is positioned in front of the detection tunnel 17. When the milk powder can passes through one side of the detection tunnel 17, the line scanning camera 16 performs a comprehensive image detection on its printed surface.

[0022] The turntable module 15 includes a turntable 25 mounted and connected via a support frame 26. The bottom of the support frame 26 is connected to a turntable drive motor 18 for driving the support frame 26 to rotate via a coupling. That is, under the operation of the turntable drive motor 18, in conjunction with the connection and support of the support frame 26, the turntable 25 is controlled to rotate. At the same time, multiple arc-shaped milk powder can clamping ports 20 are evenly spaced on the circumferential side wall of the turntable 25. Clamping rollers 22 are symmetrically arranged on both sides of the outer end of the milk powder can clamping ports 20. The clamping rollers 22 roll and clamp the milk powder cans placed inside the milk powder can clamping ports 20. That is, under the rotation of the turntable 25, the milk powder can clamping ports 20 are controlled to roll and clamp the milk powder cans at the feeding conveyor line 10 and the unloading conveyor line 11 and then transfer them. Each milk powder can clamping port 20 has a set of self-rotating drive wheels 21 in the middle of its inner side. The milk powder can, under clamping and positioning, rotates 360° under the drive of the self-rotating drive wheels 21. Thus, when the milk powder can clamping port 20 controls it to pass through the detection tunnel 17, the rotation of the milk powder can ensure that the printed outer surface is covered for quality inspection. The top of the self-rotating drive wheels 21 is connected to a set of self-rotating drive components, which are used to synchronously control all the self-rotating drive wheels 21 to rotate in the same direction.

[0023] In this embodiment of the invention, the feeding conveyor line 10 and the unloading conveyor line 11 are symmetrically provided with baffles on both sides along the length direction to ensure that the milk powder cans placed on them can move stably and linearly along the feeding conveyor line 10 and the unloading conveyor line 11, that is, to ensure that when transferred to the inside of the printing inspection equipment box 12, they can accurately contact and cooperate with the milk powder can clamping port 20 in the turntable module 15. The ends of the feeding conveyor line 10 and the unloading conveyor line 11 away from the printing inspection equipment box 12 are provided with servo motors to drive the feeding conveyor line 10 and the unloading conveyor line 11 to rotate. At the same time, support rods are installed at the bottom of the feeding conveyor line 10 and the unloading conveyor line 11 to control the feeding conveyor line 10 and the unloading conveyor line 11 to run in the air and to be placed stably inside the printing inspection equipment box 12. A human-machine interface 13 is provided on one side of the printing inspection equipment box 12. The human-machine interface 13 is connected to electrical components such as servo motors and position sensors 14, enabling operators to operate quickly and conveniently, thus ensuring the smooth operation of automation. The inspection tunnel 17 is equipped with lighting to improve the brightness inside the inspection tunnel 17, thereby ensuring that the line scan camera 16 can perform high-precision imaging and inspection of the passing milk powder cans.

[0024] In one embodiment of the present invention, a set of U-shaped mounting brackets are installed on the printing inspection equipment box 12 corresponding to the output end of the feeding conveyor line 10 and the inlet end of the unloading conveyor line 11. The position sensor 14 is installed on the middle of the side wall of the U-shaped mounting bracket through the sensor mounting bracket. The detection end of the position sensor 14 is vertically downward, and the position of the milk powder can transferred to that location is monitored in real time.

[0025] In a preferred embodiment of the present invention, the self-rotating drive assembly includes a self-rotating drive wheel shaft 24 connected to the center of the top of the milk powder can clamping opening 20. The self-rotating drive wheel shaft 24 extends movably through the turntable 25 to the outside of the top of the turntable 25. Adjacent turntables 25 are rotatably connected by pulleys and synchronous belts 23. A transmission rod is connected to the top of one set of turntables 25. The transmission rod is connected to a connecting wheel via synchronous belt 23 towards the center of the top of the turntable 25. The connecting wheel is connected upward to a drive wheel motor 19 located on the outside of the turntable 25 via pulleys and synchronous belt 23. The bottom of the drive wheel motor 19 is fixed on the printing inspection equipment box 12. That is, under the operation of the drive wheel motor 19, in conjunction with the linkage of the pulley, synchronous belt 23, transmission rod and other structures, all the self-rotating drive wheels 21 are synchronously controlled to rotate, so as to realize the 360° rotation of the milk powder can placed inside the milk powder can clamping opening 20.

[0026] It should be noted that, firstly, the milk powder can clamping ports 20 located at the output end of the feeding conveyor line 10 and the inlet end of the unloading conveyor line 11 both extend to the feeding conveyor line 10 and the unloading conveyor line 11. This ensures that the rotation of the turntable 25, in conjunction with the rolling clamping of the milk powder can by the milk powder can clamping ports 20, automatically controls the transfer of the milk powder can between the feeding conveyor line 10, the milk powder can clamping ports 20, and the unloading conveyor line 11. In order to prevent the milk powder can from falling downwards in the rolling clamping state, a sliding rail is provided at the bottom of the turntable 25 to support the bottom of the milk powder can without affecting its rotation. Secondly, the connection distribution, relationship and corresponding operating principle between the human-machine interface 13 and the electrical components are all existing technologies and will not be elaborated here.

[0027] In a preferred embodiment of the present invention, the radius of the clamping arc surface of the milk powder can clamping opening 20 is ≤0.5mm to the outer diameter of the milk powder can; The surface of the self-rotating drive wheel 21 is coated with a polyurethane friction layer (Shore hardness 70A) to increase the friction with the outer surface of the milk powder can; The line scan camera 16 uses a 50-megapixel CMOS sensor (100kHz line frequency) and is equipped with a telecentric lens, which is vertically pointed to detect the center line of the tunnel. The detection unit also includes an image processing system with a built-in defect recognition algorithm (based on grayscale variance threshold to determine printing defects) for real-time algorithm detection of the outer surface of the milk powder can.

[0028] The working principle of this utility model is as follows: In the idle position of this device, all the aforementioned driving components (representing power elements, electrical devices, and compatible power supplies) are connected via wires. The electrical connections are completed in sequence between the working components. The detailed connection methods are well-known in the field. The following mainly describes the working principle and process, without further explanation of the electrical control. Feeding and positioning: The milk powder can enters the detection channel via the feeding conveyor line 10. The position sensor 14 triggers infrared ranging, and the can stops at the material receiving position on the turntable. Turntable clamping and transfer: The turntable drive motor 18 starts, the clamping rollers 22 of the clamping port 20 hug the tank, and the synchronous belt 23 drives the self-rotating drive wheel 21 to rotate the tank. 360° dynamic scanning: The turntable 25 rotates the tank to the detection tunnel 17, and the line scan camera 16 continuously acquires surface images while the tank is rotating; Graded feeding: The system determines the defect level in real time. Qualified products are transferred to feeding line 11, while unqualified products are sorted to the waste area by pneumatic push rods.

[0029] It should be understood that in this application, all rotating, sliding, meshing, belt-driven and other moving parts are well lubricated and not prone to slippage or wear, and each part is provided with a corresponding protective shell. However, in the accompanying drawings of this application, the connection state of each moving part is not shown. It should also be understood that all parts in this application are made of metal or plastic materials with suitable strength in the relevant field to ensure that their structural rigidity meets the actual requirements.

[0030] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A milk powder can printing inspection equipment, characterized in that, include: Feeding conveyor line (10) and unloading conveyor line (11); The printing inspection equipment box (12) is located between the feeding conveyor line (10) and the unloading conveyor line (11), and an inspection channel is opened in the middle of the box; A turntable module (15) is located in the detection channel and includes a turntable (25) installed by a support frame (26). Multiple milk powder can clamping ports (20) are evenly spaced on the circumferential side wall of the turntable (25). The self-rotation drive assembly includes a self-rotation drive wheel (21) located in the middle of the inner side of each milk powder can clamping port (20), and a synchronous belt (23) and drive wheel motor (19) that synchronously drive all self-rotation drive wheels (21). The detection unit includes a detection tunnel (17) located on one side of the moving path of the turntable (25), and line scan cameras (16) distributed opposite the detection tunnel (17). Two sets of position sensors (14) are provided and are respectively located at the connection between the output end of the feeding conveyor line (10) and the inlet end of the unloading conveyor line (11) and the turntable module (15).

2. The milk powder can printing inspection equipment according to claim 1, characterized in that, The milk powder can clamping opening (20) has an arc-shaped structure, with clamping rollers (22) symmetrically arranged on both sides of its outer end, and a slide rail for supporting the milk powder can is provided at the bottom of the turntable (25).

3. The milk powder can printing inspection equipment according to claim 1, characterized in that, The self-rotation drive assembly also includes a self-rotation drive wheel axle (24) that connects to the self-rotation drive wheel (21). The self-rotation drive wheel axle (24) moves through the turntable (25). Adjacent self-rotation drive wheel axles (24) are connected by a synchronous belt (23) and driven by a drive wheel motor (19).

4. The milk powder can printing inspection equipment according to claim 1, characterized in that, The detection tunnel (17) is equipped with lighting.

5. The milk powder can printing inspection equipment according to claim 1, characterized in that, A human-machine interface (13) is provided on one side of the printing inspection equipment box (12), and the human-machine interface (13) is connected to electrical components.

Images