Automatic induction code spraying device based on color difference recognition

Abstract

The application provides an automatic induction code spraying device based on color difference recognition, comprising a data processing machine, a monitoring module and a code spraying structure. The color sensor in the color difference monitoring module collects the color difference data of the surface of the carton under the assistance of the supplementary light, and the data processing machine sends instructions to the two independent nozzles of the code spraying structure, respectively adjusts the ink spraying amount and concentration for dark and light cartons, effectively solves the unclear identification problem caused by fixed parameters in the prior art, ensures that the code on the cartons with different color differences is clear and distinguishable, and improves the product identification quality and the enterprise image. Meanwhile, the X-axis moving structure is adjusted along the transmission direction, the Y-axis moving structure is adjusted along the width direction, the Z-axis moving structure is stably lifted through the cooperation of the sliding block and the vertical sliding groove, the code spraying demand of cartons with different sizes can be met, the universality of the device is greatly improved, and the code spraying efficiency is improved through the cooperation of the components.

Description

Technical Field

[0001] This application relates to the field of packaging equipment technology, and in particular to an automatic induction coding device based on color difference recognition. Background Technology

[0002] An inkjet printer is a software-controlled device that marks product surfaces using a non-contact method. Its working principle typically involves using a high-voltage electric field to break ink into tiny, charged droplets. These droplets, under the influence of the deflecting electric field, move along a preset trajectory, ultimately forming clear and accurate characters, patterns, or QR codes on the surface of the object being printed.

[0003] The existing technology has the following problems:

[0004] In practical applications, existing inkjet printing equipment has obvious limitations when printing on cartons. Due to the influence of various factors such as raw materials, processing technology, and storage environment during the production of cartons, there are often certain color differences on the surface of cartons from different batches or even the same batch. Most existing inkjet printing equipment relies on fixed printing parameters. Once these parameters are set, they will not be adjusted according to the actual situation of the carton surface during the printing process.

[0005] When dealing with dark-colored cardboard boxes, the ink sprayed under fixed parameters may lack contrast, resulting in blurry and illegible markings. Conversely, with lighter-colored cardboard boxes, excessive ink spraying may cause smudging and unclear edges. This inability to adapt to color differences on the cardboard box surface not only affects the quality of product markings and lowers the overall product image but may also lead to difficulties in information identification, causing unnecessary losses and troubles for businesses. Utility Model Content

[0006] The purpose of this invention is to provide an automatic induction inkjet printing device based on color difference recognition in order to solve the above-mentioned problems.

[0007] The technical solution of this application is implemented as follows:

[0008] This application provides an automatic induction inkjet printing device based on color difference recognition, including a data processor and a monitoring module. The data processor is electrically connected to the monitoring module, and an inkjet printing structure is fixedly installed in the middle section of the monitoring module.

[0009] The monitoring module includes a frame adapted to mount a conveyor belt. A mounting plate extends along the width of the conveyor belt in its middle section. The coding structure is fixedly mounted above the conveyor belt via the mounting plate. A color difference monitoring module is mounted across the front end of the conveyor belt along its width, and this module is used to collect color difference data on the surface of the carton. A quality inspection module is mounted across the rear end of the conveyor belt along its width, and this module is used to inspect the coding effect. Both the color difference monitoring module and the quality inspection module are connected to the electromechanical signal of the data processing unit.

[0010] In one embodiment, the color difference monitoring module includes a first mounting bracket and a second mounting bracket, which are arranged sequentially along the transmission direction of the conveyor belt. Both are mounted horizontally across the front end of the conveyor belt and erected above the conveyor belt along the width direction of the belt surface. Inside the first mounting bracket, a photoelectric emitter is provided at the bottom left end along the width direction of the belt surface, and a photoelectric receiver is provided at the bottom right end. The two are at the same horizontal height and their optical paths are opposite each other. The photoelectric receiver is connected to the data processing electromechanical signal. Inside the second mounting bracket, a color sensor is fixedly mounted at the top and middle part along the width direction of the belt surface. The detection lens of the color sensor is perpendicular to the conveyor belt surface. A supplementary light is fixedly mounted on the right side of the top inside the second mounting bracket. The color sensor is connected to the data processing electromechanical signal.

[0011] In one embodiment, the quality inspection module includes a third mounting bracket, which is installed across the tail end of the conveyor belt and above the conveyor belt along the width direction of the belt surface. A visual inspection unit is fixedly installed on the top inner side of the third mounting bracket at the middle part along the width direction of the belt surface. The lens of the visual inspection unit is vertically facing the conveyor belt surface, and the visual inspection unit is connected to the data processing electromechanical signal.

[0012] In one embodiment, the coding structure includes at least two mounting brackets, which are fixedly connected to a mounting plate and symmetrically installed on the left and right sides above the conveyor belt. Each mounting bracket has an X-axis moving structure fixedly installed on its top. The extension direction of the X-axis moving structure is parallel to the conveying direction of the conveyor belt. A housing is movably mounted on the X-axis moving structure. A Y-axis moving structure is fixedly installed inside the housing. The extension direction of the Y-axis moving structure is consistent with the width direction of the conveyor belt and it spans across the conveyor belt. A Z-axis moving structure is movably mounted at the front end of the Y-axis moving structure. The extension direction of the Z-axis moving structure is perpendicular to the conveyor belt. The X-axis moving structure, Y-axis moving structure, and Z-axis moving structure are all electrically connected to a data processor.

[0013] In one embodiment, the Z-axis moving structure includes a mounting shell, which is movably disposed at the front end of the Y-axis moving structure. A first motor is disposed at the top of the mounting shell and is connected to the electrical signal of a data processing machine. A connecting block is integrally formed at the bottom of the front end of the mounting shell. A first lead screw is fixedly mounted through the output end of the first motor at the top end of the mounting shell. The end of the first lead screw away from the first motor is rotatably connected to the top of the connecting block through a bearing. A first threaded sleeve is threadedly fitted on the outer side of the first lead screw. Vertical grooves are symmetrically opened on the left and right sides of the front end of the mounting shell. A slider is slidably mounted in the groove. A docking plate is mounted on the front end of the first threaded sleeve and the slider. At least two printheads are fixedly mounted on the front end of the docking plate. Each printhead is connected to a corresponding color ink cartridge through an independent pipeline, and each printhead is connected to the electrical signal of the data processing machine.

[0014] In one embodiment, the Y-axis moving structure includes a second motor, which is electrically connected to a data processor. The second motor is fixedly installed on the right side of the inner side of the housing, and a protective shell is fixedly installed on the left side of the inner side of the housing. The output end of the second motor passes through the protective shell and is fixedly connected to a second lead screw. The axial direction of the second lead screw is consistent with the width direction of the conveyor belt. The end of the second lead screw away from the second motor is rotatably connected to the left side wall of the inner side of the protective shell through a bearing. A second threaded sleeve is threadedly fitted on the outer side of the second lead screw. A mating block is fixedly installed at the front end of the second threaded sleeve, and the front end of the mating block is fixedly connected to the mounting shell.

[0015] In one embodiment, the X-axis moving structure and the Y-axis moving structure have the same transmission structure, both including a drive motor, a lead screw, a threaded sleeve, and a guide assembly, differing only in their installation orientation and moving direction. The drive motor of the X-axis moving structure is electrically connected to the data processing unit, and the lead screw axis is parallel to the transmission direction of the conveyor belt, enabling the housing to adjust its position along the transmission direction. The drive motor of the Y-axis moving structure is electrically connected to the data processing unit, and the lead screw axis is along the width direction of the conveyor belt, enabling the Z-axis moving structure to adjust its position along the width direction.

[0016] Beneficial effects:

[0017] This application discloses an automatic induction inkjet printing device based on color difference recognition. The device collects color difference data on the surface of cartons through a color sensor in the color difference monitoring module under the assistance of a supplementary light. The data processor then sends instructions to two independent printheads in the inkjet printing structure to adjust the ink spray volume and concentration for dark and light-colored cartons respectively. This effectively solves the problem of unclear markings caused by fixed parameters in the prior art, ensuring that the inkjet printing on cartons with different color differences is clearly identifiable, thereby improving the quality of product marking and corporate image.

[0018] Meanwhile, the X-axis, Y-axis, and Z-axis moving structures in this invention form a three-dimensional adjustment system. The X-axis moving structure adjusts along the transmission direction, the Y-axis moving structure adjusts along the width direction, and the Z-axis moving structure achieves smooth lifting and lowering through the cooperation of a slider and a vertical slide. This system can adapt to the coding requirements of cartons of different sizes, greatly improving the versatility of the device. Furthermore, the coordinated operation of each component achieves automated adjustment, reducing manual intervention and improving coding efficiency. This system is more suitable for large-scale assembly line production and avoids the losses and troubles caused by untimely or inaccurate manual adjustments in existing technologies. Attached Figure Description

[0019] The accompanying drawings illustrate exemplary embodiments of the present application and, together with the description thereof, serve to explain the principles of the present application. These drawings are included to provide a further understanding of the present application and are incorporated in and constitute a part of this specification.

[0020] Figure 1 A schematic diagram of the overall structure of an embodiment of this application is shown;

[0021] Figure 2 A schematic diagram of the monitoring module in an embodiment of this application is shown;

[0022] Figure 3 A schematic diagram of the color difference monitoring module according to an embodiment of this application is shown;

[0023] Figure 4 A schematic diagram of the quality inspection module in an embodiment of this application is shown;

[0024] Figure 5 A schematic diagram of the inkjet printing structure according to an embodiment of this application is shown;

[0025] Figure 6 A schematic diagram of the Z-axis moving structure according to an embodiment of this application is shown;

[0026] Figure 7 A partial structural schematic diagram of the Z-axis moving structure according to an embodiment of this application is shown;

[0027] Figure 8 A schematic diagram of the Y-axis moving structure according to an embodiment of this application is shown;

[0028] Figure 9 A partial structural schematic diagram of the Y-axis moving structure according to an embodiment of this application is shown;

[0029] Figure 10 A schematic diagram of the X-axis moving structure according to an embodiment of this application is shown.

[0030] Reference numerals: Data Processor-1, Monitoring Module-2, Inkjet Printing Structure-3, Frame-21, Conveyor Belt-22, Mounting Plate-23, Color Difference Monitoring Module-24, Quality Inspection Module-25, Mounting Bracket-31, X-Axis Moving Structure-32, Housing-33, Y-Axis Moving Structure-34, Z-Axis Moving Structure-35, First Mounting Bracket-241, Second Mounting Bracket-242, Photoelectric Transmitter-243, Photoelectric Receiver-2431, Color... Color sensor-244, supplementary light-245, third mounting bracket-251, vision verification unit-252, second motor-341, protective shell-342, second lead screw-343, second threaded sleeve-344, docking block-345, mounting shell-351, first motor-352, connecting block-353, first lead screw-354, first threaded sleeve-355, slider-356, docking plate-357, nozzle-358. Detailed Implementation

[0031] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While some embodiments of this application are shown in the drawings, it should be understood that this application can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this application. It should be understood that the drawings and embodiments of this application are for illustrative purposes only and are not intended to limit the scope of protection of this application.

[0032] It should be noted that, where there is no conflict, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] It should be understood that the term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc., mentioned in this application are used only to distinguish different devices, modules, or units, and are not intended to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0034] It should be noted that the terms "a" and "several" used in this application are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0035] The names of the messages or information exchanged between multiple devices in the embodiments of this application are for illustrative purposes only and are not intended to limit the scope of these messages or information.

[0036] Reference Figure 1 An automatic induction inkjet printing device based on color difference recognition includes a data processor 1 and a monitoring module 2. In this embodiment, the data processor 1 is an STM32F407IGH6. The monitoring module 2 is used for transmitting cartons, monitoring color differences, and inspecting the inkjet printing effect. The data processor 1 and the monitoring module 2 are electrically connected. An inkjet printing structure 3 is fixedly installed in the middle of the monitoring module 2. As the core control component of the entire device, the data processor 1 can receive signals collected from the monitoring module 2. At the same time, based on these received data and signals, it sends control commands to the inkjet printing structure 3 to achieve precise adjustment of the inkjet printing position and inkjet printing parameters, ensuring that the inkjet printing effect meets the requirements.

[0037] In one embodiment, reference is made to Figure 2 The monitoring module 2 includes a frame 21, which provides the installation foundation and support to ensure the stability of each component during operation. The frame 21 is fitted with a conveyor belt 22, which is mainly used for continuous conveying of cartons. Cartons to be printed are transported from the front end of the conveyor belt 22 to the printing station of the printing structure 3. After printing, they are conveyed to the quality inspection module 25 at the rear end for inspection. A mounting plate 23 extends along the width of the conveyor belt 22 in the middle section. The mounting plate 23 is used to fix the printing structure 3, ensuring the printing structure... The inkjet printing structure 3 is stably positioned above the conveyor belt 22 to ensure smooth inkjet printing operations. The inkjet printing structure 3 is fixedly installed above the conveyor belt 22 via the mounting plate 23. A color difference monitoring module 24 is installed across the front end of the conveyor belt 22 along the width direction of the belt surface. The color difference monitoring module 24 is used to collect color difference data on the surface of the carton. A quality inspection module 25 is installed across the rear end of the conveyor belt 22 along the width direction of the belt surface. It is used to detect the inkjet printing effect. Both the color difference monitoring module 24 and the quality inspection module 25 are electrically connected to the data processor 1.

[0038] During operation, the conveyor belt 22 is used to transport cartons. When a carton moves to the front end of the conveyor belt 22, the color difference monitoring module 24 first sends a carton arrival signal to the data processor 1, then collects color difference data, and prints the carton using the inkjet printing structure 3 based on the collected data. After printing, the carton moves to the quality inspection module 25 driven by the conveyor belt 22. The quality inspection module 25 transmits the printed image to the data processor 1. If the image is qualified, it is sent to the next stage; if it is unqualified, the machine stops and an alarm sounds.

[0039] In one embodiment, reference is made to Figure 3The color difference monitoring module 24 includes a first mounting bracket 241 and a second mounting bracket 242, which are arranged sequentially along the transmission direction of the conveyor belt 22. Both are mounted horizontally across the front end of the conveyor belt 22 and are erected above the conveyor belt 22 along the width direction of the belt surface. The first mounting bracket 241 and the second mounting bracket 242 provide mounting support for the photoelectric transmitter 243, photoelectric receiver 2431, color sensor 244, and supplementary light 245, enabling them to accurately detect cartons on the conveyor belt. Inside the first mounting bracket 241, at the bottom left end along the width direction of the belt surface, is the photoelectric transmitter 243. In this embodiment, the photoelectric transmitter 243 is a model LD242 photoelectric transmitter. Correspondingly, at the bottom right end is the photoelectric receiver 2431, model WSE9-3N2430 photoelectric receiver. Both are at the same horizontal height and their optical paths are opposite each other. The photoelectric receiver 2431 is electrically connected to the data processor 1. The photoelectric transmitter 243 and the photoelectric receiver 2431 work together. When the cardboard box passes by, the light emitted by the photoelectric emitter 243 is blocked by the cardboard box, and the photoelectric receiver 2431 cannot receive the light, thus generating a cardboard box arrival signal. This signal is transmitted to the data processor 1, informing the data processor 1 that the cardboard box has reached the detection position, and prompting the color sensor 244 to prepare to monitor the cardboard box. The color sensor 244 is fixedly installed on the inner top of the second mounting bracket 242, along the middle of the width direction of the belt surface. In this embodiment, the color sensor 244 is model CSS-WBG4C4118AA10Z. The detection lens of the color sensor 244 is perpendicularly facing the belt surface of the conveyor belt 22. A supplementary light 245 is fixedly installed on the right side of the inner top of the second mounting bracket 242. The color sensor 244 is electrically connected to the data processor 1. With the assistance of the supplementary light 245, the color sensor 244 collects the color information of the cardboard box surface perpendicularly facing the belt surface of the conveyor belt 22, thereby obtaining color difference data, and transmitting this data to the data processor 1 to provide a basis for the data processor 1 to adjust the inkjet printing parameters.

[0040] During operation, the conveyor belt 22 transports the carton to be printed. It first passes through the first mounting frame 241. At this time, the photoelectric transmitter 243 at the bottom left side of the first mounting frame 241 emits light. The photoelectric receiver 2431 at the bottom right side can normally receive the light. However, when the carton passes by, the light is blocked. The photoelectric receiver 2431 generates a carton arrival signal and transmits it to the data processor 1 to inform that the carton has reached the detection position.

[0041] The carton is then transferred to the area below the second mounting bracket 242. The color sensor 244 located at the top center of the inner side of the second mounting bracket 242 begins to operate, with its detection lens perpendicularly facing the surface of the carton. At the same time, the supplementary light 245 on the right side illuminates, providing sufficient and stable light to the detection area. With the assistance of the supplementary light 245, the color sensor 244 accurately collects the color information of the carton surface, thereby obtaining color difference data, and transmits this data to the data processor 1 in real time. The data processor 1 adjusts the parameters of the subsequent inkjet printing based on this data to ensure that the inkjet printing is clearly displayed on the carton.

[0042] In one embodiment, reference is made to Figure 4 The quality inspection module 25 includes a third mounting bracket 251, which is installed across the tail end of the conveyor belt 22 and above the conveyor belt 22 along the width of the belt surface. The conveyor belt 22 provides mounting support for the visual inspection unit 252, enabling it to accurately photograph and inspect the printed cartons passing on the conveyor belt. The visual inspection unit 252 is fixedly installed on the top inner side of the third mounting bracket 251 and in the middle along the width of the belt surface. In this embodiment, the visual inspection unit model 252 is MV-CA050-10GC. The lens of the visual inspection unit 252 is perpendicular to the surface of the conveyor belt 22. The visual inspection unit 252 is electrically connected to the data processor 1. The visual inspection unit 252 acquires images of the printed cartons and transmits the acquired image information to the data processor 1. The data processor 1 analyzes the images and determines whether the printing is clear, complete, and meets the requirements. If a problem is found, an early warning is issued in time.

[0043] When the printed carton is conveyed by the conveyor belt 22 to the area below the third mounting frame 251, the vision verification unit 252 is quickly activated to capture images of the printed area on the surface of the carton. The captured image information is transmitted to the data processor 1 in real time. The data processor 1 uses a built-in image analysis algorithm to judge the clarity, completeness, and whether the printed code meets the preset standards. If problems such as blurry printing, missing characters, or positional misalignment are detected, the data processor 1 immediately issues a warning signal and controls the conveyor belt 22 to stop operating. If the printed code meets the requirements, the conveyor belt 22 continues to transport the carton to the subsequent process.

[0044] In one embodiment, reference is made to Figure 5The coding structure 3 includes at least two mounting brackets 31. In this embodiment, four mounting brackets 31 are provided, corresponding to the number of mounting plates 23. The mounting brackets 31 are fixedly connected to the mounting plates 23 and symmetrically installed on the left and right sides above the conveyor belt 22. An X-axis moving structure 32 is fixedly installed on the top of each mounting bracket 31. The mounting bracket 31 provides a mounting base for the X-axis moving structure 32, ensuring the stable operation of the X-axis moving structure 32. The extension direction of the X-axis moving structure 32 is parallel to the transmission direction of the conveyor belt 22. A housing 33 is movably mounted on it for mounting a Y-axis moving structure 34, providing a stable mounting space for the Y-axis moving structure 34, and moving together with the X-axis moving structure 32. A Y-axis moving structure 34 is fixedly installed inside the 33. The extension direction of the Y-axis moving structure 34 is consistent with the width direction of the conveyor belt 22, and it spans across the top of the conveyor belt 22. A Z-axis moving structure 35 is movably installed at the front end of the Y-axis moving structure 34. The Y-axis moving structure 34 is used to drive the Z-axis moving structure 35 to move along the Y-axis direction (i.e., the width direction of the conveyor belt), so as to realize the position adjustment of the inkjet printing structure 3 in this direction, so that the inkjet printing structure 3 can be aligned with the longitudinal position on the carton that needs to be printed. The extension direction of the Z-axis moving structure 35 is perpendicular to the surface of the conveyor belt 22. The X-axis moving structure 32, the Y-axis moving structure 34 and the Z-axis moving structure 35 are all connected to the data processor 1 by electrical signals.

[0045] In one embodiment, reference is made to Figures 6-7The Z-axis moving structure 35 includes a mounting shell 351, which is movably disposed at the front end of the Y-axis moving structure 34. The mounting shell 351 serves as the basic frame of the Z-axis moving structure 35, primarily acting as a mounting carrier. Simultaneously, through its movable connection with the front end of the Y-axis moving structure 34, it enables the Z-axis moving structure 35 to move synchronously with the Y-axis moving structure 34, ensuring the stability of the overall structure. A first motor 352 is disposed at the top of the mounting shell 351. The first motor 352 is electrically connected to the data processor 1, serving as the power source for Z-axis movement and capable of receiving and processing data. The control command issued by the processing unit 1 drives the first lead screw 354 to rotate via forward and reverse rotation, thereby driving the subsequent components to raise and lower the nozzle 358. A connecting block 353 is integrally formed at the bottom front end of the mounting housing 351. The connecting block 353 ensures the stability of the first lead screw 354 during rotation and prevents it from shifting. The output end of the first motor 352 passes through the top of the mounting housing 351 and is fixedly mounted on the first lead screw 354. The end of the first lead screw 354 away from the first motor 352 is rotatably connected to the top of the connecting block 353 via a bearing. A first threaded sleeve 355 is threadedly fitted onto the outer side of the first lead screw 354. Driven by the first motor 352, the first threaded sleeve 355 rotates, converting its rotational motion into the vertical linear motion of the first threaded sleeve 355 through its threaded engagement with the first threaded sleeve 355. This is a key transmission component for raising and lowering the nozzle 358. The mounting housing 351 has symmetrical vertical grooves on its left and right front sides, with sliders 356 slidably installed within these grooves. When the first threaded sleeve 355 moves, the sliders 356 slide along the grooves, guiding and limiting the docking plate 357 to prevent it from rotating with the first lead screw 354, thus ensuring the smoothness of the nozzle 358's raising and lowering process. A docking plate 357 is installed on the front end of the first threaded sleeve 355, the slider 356 and the printhead 358. The docking plate 357 serves as an intermediate component connecting the first threaded sleeve 355, the slider 356 and the printhead 358. It transmits the movement of the first threaded sleeve 355 and the slider 356 to the printhead 358 and provides an installation position for the printhead 358. At least two printheads 358 are fixedly installed on the front end of the docking plate 357. Each printhead 358 is connected to a corresponding color ink cartridge through an independent pipeline. Each printhead 358 is also electrically connected to the data processor 1.Based on the instructions issued by the data processor 1 based on the color difference data of the carton surface, the ink spray volume and concentration can be independently adjusted to print clear and appropriately contrasted markings on the carton surface. In this embodiment, there are two printheads 358, namely printhead A and printhead B. Printhead A is connected to a black ink cartridge through an independent pipeline, and printhead B is connected to a white ink cartridge through an independent pipeline. Both are electrically connected to the data processor 1. When the color difference monitoring module 24 detects that the surface color of the carton conveyed on the conveyor belt 22 is dark, the color sensor 244 transmits the collected color difference data to the data processor 1. After analysis, the data processor 1 sends an instruction to printhead A to increase the spray volume of black ink and adjust the concentration to an appropriate value to ensure that the markings such as production date and batch number printed on the dark carton surface are clearly visible. When the surface color of the carton is detected to be light, the data processor 1 sends an instruction to printhead B to adjust the spray volume and concentration of white ink so that the printed markings form an appropriate contrast with the light-colored carton and are equally clear and distinguishable. The two printheads work independently and precisely coordinate according to the color difference on the surface of the carton, ensuring the quality of the printing on cartons of different colors.

[0046] In one embodiment, reference is made to Figures 8-9 The Y-axis moving structure 34 includes a second motor 341, which is electrically connected to the data processor 1. The second motor 341 serves as the power source for Y-axis movement, receiving control commands from the data processor 1. It drives the second lead screw 343 to rotate via forward and reverse rotation, thereby driving subsequent components to adjust the position of the nozzle 358 in the width direction of the conveyor belt. The second motor 341 is fixedly installed on the right side inside the housing 33. A protective shell 342 is fixedly installed on the left side inside the housing 33. The protective shell 342 protects the second lead screw 343 from external dust, debris, and other interference with its normal rotation. It also provides stable support to the left end of the second lead screw 343, ensuring its coaxiality during rotation. The output end of the second motor 341 passes through the protective shell 342. A second lead screw 343 is fixedly connected, and the axis of the second lead screw 343 is aligned with the width direction of the conveyor belt 22. The end of the second lead screw 343 away from the second motor 341 is rotatably connected to the inner left side wall of the protective shell 342 via a bearing. A second threaded sleeve 344 is threadedly fitted onto the outer side of the second lead screw 343. A mating block 345 is fixedly installed at the front end of the second threaded sleeve 344. The second lead screw 344 rotates under the drive of the second motor 341, and its axis is aligned with the width direction of the conveyor belt 22. Through the threaded engagement with the second threaded sleeve 344, the rotational motion is converted into the transverse linear motion of the second threaded sleeve 344. In turn, the mating block 345 drives the Z-axis moving structure 35 to move synchronously. The front end of the mating block 345 is fixedly connected to the mounting shell 351.

[0047] In one embodiment, reference is made to Figure 10The X-axis moving structure 32 and the Y-axis moving structure 34 have the same transmission structure, both including a drive motor, a lead screw, a threaded sleeve and a guide assembly;

[0048] A consistent transmission structure design helps reduce the design complexity and manufacturing cost of the device. A unified selection of components and structural patterns facilitates production, assembly, debugging, and subsequent maintenance, reducing additional costs and operational difficulties caused by structural differences.

[0049] The X-axis moving structure 32 and the Y-axis moving structure 34 differ only in their installation orientation and moving direction. The drive motor of the X-axis moving structure 32 is electrically connected to the data processor 1, and the lead screw axis is parallel to the transmission direction of the conveyor belt 22, which can drive the housing 33 to adjust its position along the transmission direction. The drive motor of the Y-axis moving structure 34 is electrically connected to the data processor 1, and the lead screw axis is along the width direction of the conveyor belt 22, which can drive the Z-axis moving structure 35 to adjust its position along the width direction.

[0050] Working principle:

[0051] The frame 21 serves as the basic framework of the entire device, providing a stable mounting foundation and support for all components. When the carton is conveyed to the front end by the conveyor belt 22, it first passes through the first mounting bracket 241 of the color difference monitoring module 24. The photoelectric transmitter 243 (model LD242) located at the bottom left end of the inner side of the bracket and the photoelectric receiver 2431 (model WSE9-3N2430) located at the bottom right end are at the same horizontal level and their light paths are opposite. The light emitted by the photoelectric transmitter 243 could originally be received by the photoelectric receiver 2431. However, when the carton passes by, the light... When the blockage is blocked, the photoelectric receiver 2431 generates a cardboard box arrival signal and transmits the signal to the data processor 1, informing the data processor 1 that the cardboard box has reached the detection position. Then, the cardboard box is transferred to the bottom of the second mounting bracket 242. The color sensor 244, model CSS-WBG4C4118AA10Z, which is fixedly installed in the middle of the top of the inner side of the bracket, has its detection lens facing the cardboard box surface vertically with the assistance of the right supplement light 245, accurately collecting the color information of the cardboard box surface to obtain color difference data, and transmitting this data to the data processor 1 in real time.

[0052] After receiving the position signal from the photoelectric receiver 2431 and the color difference data from the color sensor 244, the data processor 1 sends a control command to the inkjet printing structure 3. The drive motor of the X-axis moving structure 32 receives the control command from the data processor 1 and drives the housing 33 to adjust its position along the transmission direction of the conveyor belt 22 through the coordinated action of the lead screw, threaded sleeve and guide assembly, so as to realize the position adjustment of the inkjet printing in the transmission direction. The housing 33 provides a stable installation space for the Y-axis moving structure 34 and moves synchronously with the X-axis moving structure 32.

[0053] The second motor 341 of the Y-axis moving structure 34 receives the instruction from the data processor 1 and drives the second lead screw 343 to rotate. Through the second threaded sleeve 344 and the docking block 345, it drives the Z-axis moving structure 35 to adjust its position along the width direction of the conveyor belt 22, thereby realizing the position adjustment of the inkjet printer in the width direction. The protective shell 342 plays a protective and support role for the second lead screw 343, ensuring its stable rotation.

[0054] The mounting shell 351 of the Z-axis moving structure 35 serves as the basic frame and moves synchronously with the Y-axis moving structure 34. The first motor 352 receives instructions from the data processor 1 to rotate in both directions, driving the first lead screw 354 to rotate. This rotation is achieved through the first threaded sleeve 355, which in turn drives the docking plate 357 to move vertically. The connecting block 353 ensures the stability of the rotation of the first lead screw 354. The slider 356 slides along the vertical groove, guiding and limiting the docking plate 357 to ensure the smooth lifting and lowering of the nozzle 358. The docking plate 357 provides an installation platform for the nozzle 358.

[0055] Two printheads 358, namely printhead A and printhead B, are connected to ink cartridges of corresponding colors through independent pipelines. They receive instructions from data processor 1 based on color difference data and independently adjust the ink spray volume and concentration to print clear and appropriately contrasted markings on the surface of the carton.

[0056] After the inkjet printing is completed, the carton moves to the quality inspection module 25 at the end under the drive of the conveyor belt 22. A vision verification unit 252 is fixedly installed in the middle of the top of the third mounting bracket 251 inside the quality inspection module 25. The lens of the vision verification unit 252 is vertically facing the surface of the conveyor belt 22 and is electrically connected to the data processor 1. It collects images of the inkjet-printed carton and transmits the image information to the data processor 1. The data processor 1 analyzes the image and judges whether the inkjet printing is clear, complete and meets the requirements. If a problem is found, it will issue an early warning and control the conveyor belt 22 to stop operating. If it is qualified, the conveyor belt 22 will transport the carton to the next stage. The whole process is automated through the electrical signal connection between each component and the data processor 1.

[0057] In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0058] Those skilled in the art should understand that the above embodiments are merely for illustrative purposes and are not intended to limit the scope of this application. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of this application.

Claims

1. An automatic induction inkjet printing device based on color difference recognition, characterized in that: It includes a data processor (1) and a monitoring module (2), wherein the data processor (1) and the monitoring module (2) are electrically connected, and a coding structure (3) is fixedly installed in the middle section of the monitoring module (2). The monitoring module (2) includes a frame (21), which is adapted to install a conveyor belt (22). A mounting plate (23) is provided in the middle section of the conveyor belt (22) along the width direction of the belt surface. The inkjet printing structure (3) is fixedly installed above the conveyor belt (22) through the mounting plate (23). A color difference monitoring module (24) is installed across the front end of the conveyor belt (22) along the width direction of the belt surface. The color difference monitoring module (24) is used to collect color difference data on the surface of the carton. A quality inspection module (25) is installed across the rear end of the conveyor belt (22) along the width direction of the belt surface. It is used to detect the inkjet printing effect. Both the color difference monitoring module (24) and the quality inspection module (25) are electrically connected to the data processor (1).

2. The automatic induction inkjet printing device based on color difference recognition according to claim 1, characterized in that: The color difference monitoring module (24) includes a first mounting bracket (241) and a second mounting bracket (242), which are arranged sequentially along the transmission direction of the conveyor belt (22) and are both installed across the front end of the conveyor belt (22) and mounted above the conveyor belt (22) along the width direction of the belt surface. Inside the first mounting bracket (241), a photoelectric transmitter (243) is provided at the bottom left end along the width direction of the belt surface, and a photoelectric receiver (2431) is provided at the bottom right end. The two are at the same horizontal height and their optical paths are opposite each other. The photoelectric receiver (2431) is electrically connected to the data processor (1). At the top inner side of the second mounting bracket (242), a color sensor (244) is fixedly installed in the middle along the width direction of the belt surface. The detection lens of the color sensor (244) is vertically facing the belt surface of the conveyor belt (22). A supplementary light (245) is fixedly installed on the right side of the top inner side of the second mounting bracket (242). The color sensor (244) is electrically connected to the data processor (1).

3. The automatic induction inkjet printing device based on color difference recognition according to claim 1, characterized in that: The quality inspection module (25) includes a third mounting bracket (251), which is mounted across the tail end of the conveyor belt (22) and erected above the conveyor belt (22) along the width direction of the belt surface. A visual inspection unit (252) is fixedly installed on the top inner side of the third mounting bracket (251) along the middle of the width direction of the belt surface. The lens of the visual inspection unit (252) is perpendicular to the belt surface of the conveyor belt (22), and the visual inspection unit (252) is electrically connected to the data processor (1).

4. The automatic induction inkjet printing device based on color difference recognition according to claim 1, characterized in that: The coding structure (3) includes at least two mounting brackets (31). The mounting brackets (31) are fixedly connected to the mounting plate (23) and symmetrically installed on the left and right sides above the conveyor belt (22). Each mounting bracket (31) has an X-axis moving structure (32) fixedly installed on its top. The extension direction of the X-axis moving structure (32) is parallel to the transmission direction of the conveyor belt (22). It has a movably mounted housing (33). A Y-axis moving structure (34) is fixedly installed inside the housing (33). The Y-axis moving structure (34) extends in the same direction as the width of the conveyor belt (22) and spans the top of the conveyor belt (22). A Z-axis moving structure (35) is movably installed at the front end of the Y-axis moving structure (34). The Z-axis moving structure (35) extends in a direction perpendicular to the conveyor belt (22). The X-axis moving structure (32), Y-axis moving structure (34) and Z-axis moving structure (35) are all connected to the data processor (1) by an electrical signal.

5. The automatic induction inkjet printing device based on color difference recognition according to claim 4, characterized in that: The Z-axis moving structure (35) includes a mounting shell (351), which is movably disposed at the front end of the Y-axis moving structure (34). A first motor (352) is disposed at the top of the mounting shell (351). The first motor (352) is electrically connected to the data processor (1). A connecting block (353) is integrally formed at the bottom of the front end of the mounting shell (351). A first lead screw (354) is fixedly installed through the top end of the first motor (352) and the end of the first lead screw (354) away from the first motor (352) is connected to the connecting block (353) via a bearing. 353) Top rotation connection, the first threaded sleeve (355) is fitted on the outside of the first screw (354) by threaded engagement, the front end of the mounting shell (351) is symmetrically provided with vertical sliding grooves on the left and right sides, and the sliding block (356) is slidably installed in the sliding grooves. The front end of the first threaded sleeve (355) and the sliding block (356) are jointly installed with a docking plate (357). The front end of the docking plate (357) is fixedly installed with no less than two printheads (358). Each printhead (358) is connected to the corresponding color ink cartridge through an independent pipeline, and each printhead (358) is electrically connected to the data processor (1).

6. The automatic induction inkjet printing device based on color difference recognition according to claim 5, characterized in that: The Y-axis moving structure (34) includes a second motor (341), which is electrically connected to the data processor (1). The second motor (341) is fixedly installed on the right side of the inner side of the outer casing (33). A protective shell (342) is fixedly installed on the left side of the inner side of the outer casing (33). The output end of the second motor (341) is fixedly connected to a second lead screw (343) through the protective shell (342). The axial direction of the second lead screw (343) is consistent with the width direction of the conveyor belt (22). The end of the second lead screw (343) away from the second motor (341) is rotatably connected to the left side wall of the inner side of the protective shell (342) through a bearing. A second threaded sleeve (344) is threadedly fitted on the outer side of the second lead screw (343). A docking block (345) is fixedly installed at the front end of the second threaded sleeve (344). The front end of the docking block (345) is fixedly connected to the mounting shell (351).

7. The automatic induction coding device based on color difference recognition according to claim 4, characterized in that: The X-axis moving structure (32) and the Y-axis moving structure (34) have the same transmission structure, both including a drive motor, a lead screw, a threaded sleeve and a guide assembly. The only difference is the installation orientation and the direction of movement. The drive motor of the X-axis moving structure (32) is electrically connected to the data processor (1), and the lead screw axis is parallel to the transmission direction of the conveyor belt (22), which can drive the housing (33) to adjust its position along the transmission direction. The drive motor of the Y-axis moving structure (34) is electrically connected to the data processor (1), and the lead screw axis is along the width direction of the conveyor belt (22), which can drive the Z-axis moving structure (35) to adjust its position along the width direction.

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