A printing apparatus that automatically adjusts a printing position
By using a combination of lighting and a CCD camera in the printing apparatus to calculate and adjust the printing position, the problem of photoelectric sensors being affected by ambient light is solved, and high-precision printing effects for multi-color printing are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG RONGYANG IND CO LTD
- Filing Date
- 2025-07-16
- Publication Date
- 2026-05-29
AI Technical Summary
The photoelectric sensors in existing printing equipment are easily affected by ambient light and are difficult to adapt to the complex markings in multi-color printing, resulting in reduced printing accuracy.
The system uses an inclined illumination lamp to illuminate the surface of the substrate, a CCD camera to capture images of the printing marks, an image processing system to calculate the positional deviation, and an electric push rod and drive frame to precisely adjust the printing position. The system also uses a ball screw and servo motor to achieve precise control of the moving mechanism.
It improves the printing equipment's adaptability to multi-color printing, ensures the printing accuracy and positional precision of the substrate, and enables precise movement and positioning of the substrate.
Smart Images
Figure CN224296842U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of printing apparatus technology, and in particular to a printing apparatus that automatically adjusts the printing position. Background Technology
[0002] A printing apparatus is a device that transfers information such as text and images onto a substrate using specific techniques and processes.
[0003] Existing printing equipment typically uses photoelectric sensors to detect printing marks and adjusts the position of printing components on the printing equipment through simple mechanical linkage mechanisms.
[0004] However, photoelectric sensors are easily affected by ambient light and are difficult to adapt to the complex markings in multi-color printing, which in turn reduces the printing accuracy of the substrate. Utility Model Content
[0005] Therefore, it is necessary to provide a printing device that automatically adjusts the printing position to address the problem that photoelectric sensors are easily affected by ambient light and have difficulty adapting to complex markings in multi-color printing.
[0006] The system includes: a printing table with a moving mechanism on its upper surface; and a control mechanism comprising a lighting lamp and a CCD camera mounted on the surface of the moving mechanism. An electric push rod is fixedly connected to the end of the printing table, and a drive frame is fixedly connected to the telescopic end of the electric push rod. Two optical sliding plates are slidably connected to the inner wall of the drive frame. The light source emitted by the lighting lamp obliquely illuminates the surface of the substrate, allowing the CCD camera to clearly capture images of the printed marks. The image processing system then calculates the deviation between the current position and the target position, enabling it to adapt to complex marks in multi-color printing. This allows the moving mechanism to precisely control the printing position, ensuring printing accuracy on the substrate. The electric push rod and drive frame work together to adjust the positions of the two smooth plates, thereby limiting the movement of the substrate on the printing table and ensuring precise movement of the substrate to the printing station.
[0007] In one embodiment, the moving mechanism includes a ball screw rotatably connected to the upper end of the inner wall of the printing table, a carriage slidably connected to the upper end of the inner wall of the printing table, the upper end of the inner wall of the carriage being threaded to the surface of the ball screw, a first servo motor fixedly connected to one side of the printing table, the output shaft of the first servo motor fixedly connected to one end of the ball screw, the tops of the lighting lamp and the CCD camera being fixedly connected to the surface of the carriage, and a flexible printing roller rotatably connected to the lower end of the inner wall of the carriage.
[0008] In one embodiment, a blocking plate is provided on the upper surface of the printing table.
[0009] In one embodiment, a plurality of guide rods are fixedly connected to the top of the blocking plate, and the surfaces of the guide rods are slidably connected to the upper end of the inner wall of the printing table.
[0010] In one embodiment, the inner wall of the blocking plate is threaded with two bolts, the threads of which are connected to the upper end of the inner wall of the printing table. By moving the bolts away from the upper end of the inner wall of the printing table, the blocking plate is released from its fixed position on the upper end of the printing table surface, thereby facilitating the maintenance of the ball screw and ensuring that the ball screw can accurately adjust the position of the flexible printing roller, thus ensuring accurate printing of the substrate by the printing device.
[0011] In one embodiment, the inner wall of the smooth plate is rolled with ball bearings.
[0012] In one embodiment, a support rod is fixedly connected to the front end of the printing table, and the inner wall of the smooth plate is slidably connected to the surface of the support rod. The support rod limits the movement of the smooth plate, preventing it from shifting during movement.
[0013] In one embodiment, two limiting rods are fixedly connected to the front end of the printing table, and the inner wall of the drive frame is slidably connected to the surface of the limiting rods. The limiting rods support and limit the movement of the drive frame, preventing it from being suspended in mid-air.
[0014] Beneficial effects
[0015] 1. The light source emitted by the illumination lamp is tilted and illuminates the surface of the substrate, allowing the CCD camera to clearly capture the image of the printed mark. The image processing system then calculates the deviation between the current position and the target position, which can adapt to the complex marks of multi-color printing. This enables the moving mechanism to accurately control the printing position and ensure the printing accuracy of the substrate. Through the cooperation of the electric push rod and the drive frame, the position of the two smooth plates is adjusted, thereby limiting the movement of the substrate on the printing table by the smooth plates and ensuring that the substrate moves accurately to the printing station.
[0016] 2. By moving the bolts away from the inner wall of the printing table, the blockage plate is released from its fixed position on the upper part of the printing table surface, which facilitates the maintenance of the ball screw and ensures that the ball screw can accurately adjust the position of the flexible printing roller, thus ensuring the accurate printing of the substrate by the printing device. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0019] Figure 2 This is a schematic diagram of the moving mechanism and the control mechanism of this utility model;
[0020] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle;
[0021] Figure 4 This is a schematic diagram of the control mechanism structure of this utility model.
[0022] Figure label:
[0023] 100. Printing table; 200. Moving mechanism; 201. Carriage; 202. Flexible printing roller; 203. First servo motor; 204. Ball screw; 300. Control mechanism; 301. CCD camera; 302. Illumination lamp; 303. Drive frame; 304. Electric push rod; 305. Smooth plate; 306. Sliding ball; 307. Support rod; 308. Limiting rod; 309. Blocking plate; 310. Bolt; 311. Guide rod. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0025] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this specification are for illustrative purposes only and do not represent the only possible implementation.
[0026] Furthermore, the terms "first" and "second" 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, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0027] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0028] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this specification belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.
[0029] The following is combined Figures 1-4 This invention describes a printing apparatus for automatically adjusting the printing position.
[0030] In one embodiment, a printing apparatus for automatically adjusting the printing position includes: a printing table 100, a moving mechanism 200 provided on the upper surface of the printing table 100; a control mechanism 300, the control mechanism 300 including an illumination lamp 302 and a CCD camera 301 provided on the surface of the moving mechanism 200, an electric push rod 304 fixedly connected to the end of the printing table 100, a drive frame 303 fixedly connected to the telescopic end of the electric push rod 304, and two optical slide plates 305 slidably connected to the inner wall of the drive frame 303.
[0031] The smooth plate 305 is made of 304 stainless steel. The top of the drive frame 303 has two oblique holes in an "eight" shape. The inner wall of the printing table 100 is rotatably connected to four pulleys. A conveyor belt is connected between the surfaces of the two pulleys. A second servo motor is fixedly connected to one end of each pulley. An impression cylinder is rotatably connected to the inner wall of the printing table 100. A third servo motor is fixedly connected to one end of the impression cylinder. The surfaces of the second and third servo motors are fixedly connected to one side of the printing table 100. A CNC screen is provided on one side of the printing table 100. The surface of the moving mechanism 200 is equipped with an ink fountain and an ink knife.
[0032] A CNC control panel is a device with display and input functions, serving as the interface between the user and the CNC system. Users can input various control commands and parameters through the CNC control panel, while simultaneously viewing the equipment's operating status, processing progress, and other information in real time. This is a relatively common and well-known technology in the field and is not closely related to the technical problem of this application; therefore, it has not been further described.
[0033] The CCD camera 301 is a camera that uses a charge-coupled device (CCD) as its photosensitive element. A CCD is an integrated circuit composed of numerous photosensitive units that convert light into electrical charges, which are then processed into digital image signals. The mirror surface of the CCD camera 301 should be wiped periodically.
[0034] When light shines on the CCD chip, each photosensitive unit absorbs photons and generates a corresponding charge. The number of photons is proportional to the intensity of the light, so the amount of charge generated by each pixel reflects the light intensity at that pixel location. The generated charge is stored in a tiny capacitor corresponding to each pixel. During exposure, the capacitor continuously accumulates charge until the exposure ends. After exposure, by applying a specific clock signal, the charge in the CCD chip is transferred row by row and column by column to the output end in a specific order. This charge transfer is achieved through electric field control between adjacent pixels. The charge transferred to the output end is converted into a voltage signal, which, after amplification and filtering, is then converted from an analog signal to a digital signal by an analog-to-digital converter. Finally, the digital signal is transmitted to the camera's image processing unit for further processing and storage.
[0035] In this embodiment, when printing on cardboard is required, the operator inputs various control commands and parameters on the CNC screen to automatically activate the second servo motor, the third servo motor, the moving mechanism 200, the lighting lamp 302, the CCD camera 301, and the electric push rod 304. The extension end of the electric push rod 304 moves, driving the drive frame 303 to move. After the drive frame 303 moves, it drives the two smooth plates 305 to move to the appropriate position, and then automatically shuts off the electric push rod 304. The output shaft of the second servo motor rotates, driving the corresponding pulley to rotate. The corresponding pulley rotates, driving the conveyor belt to drive the cardboard, placing it on the conveyor belt. At this time, the two smooth plates 305 limit the movement of the cardboard. The light source on the lighting lamp 302 illuminates the cardboard surface at an angle. The CCD camera 301 captures the printing mark image. The image processing system calculates the deviation between the current position and the target position. The image processing system calculates the position deviation and sends it to the control system in the CNC screen. At this time, the moving mechanism 200 is automatically activated to move to the appropriate position. The impression cylinder applies constant pressure to the cardboard to ensure printing quality. The ink fountain continuously supplies ink, thereby accurately printing the carton.
[0036] like Figure 2 and Figure 4 As shown, the moving mechanism 200 includes a ball screw 204 rotatably connected to the upper end of the inner wall of the printing table 100, a slide 201 slidably connected to the upper end of the inner wall of the printing table 100, the upper end of the inner wall of the slide 201 being threadedly connected to the surface of the ball screw 204, a first servo motor 203 fixedly connected to one side of the printing table 100, the output shaft of the first servo motor 203 being fixedly connected to one end of the ball screw 204, the tops of the lighting lamp 302 and the CCD camera 301 being fixedly connected to the surface of the slide 201, and a flexible printing roller 202 rotatably connected to the lower end of the inner wall of the slide 201.
[0037] Corrugated rubber pads are fixedly connected to both sides of the slide 201, and the other side of the corrugated rubber pads is fixedly connected to the upper surface of the printing table 100. A fourth servo motor is fixedly connected to one end of the flexible printing roller 202, and the surface of the fourth servo motor is fixedly connected to one side of the slide 201. The bottom of the ink fountain is installed at the end of the slide 201, and the top of the ink knife is installed at the lower end of the surface of the slide 201.
[0038] The flexible printing roller 202 is made of 45# steel with chrome plating and can be 300mm in diameter; the CCD camera 301 can be a 5-megapixel industrial camera with a resolution of 2448×2048; the first servo motor 203, the second servo motor, the third servo motor and the fourth servo motor are all 400W AC servo motors, equipped with a 17-bit absolute encoder; the ball screw 204 can be a precision ground product with a diameter of 20mm and a lead of 5mm.
[0039] In this embodiment, the first servo motor 203 is automatically turned on. The output shaft of the first servo motor 203 rotates, which drives the ball screw 204 to rotate. The rotation of the ball screw 204 drives the slide 201 and the flexible plate roller 202 to move to a suitable position, so that the flexible plate roller 202 can be accurately positioned at the position to be printed on the top of the cardboard. The first servo motor 203 is automatically turned off. At this time, the ink in the ink fountain is continuously supplied to the surface of the flexible plate roller 202 through the ink knife, so that the flexible plate roller 202 can print the corresponding image on the cardboard.
[0040] like Figure 4 As shown, a blocking plate 309 is provided on the upper surface of the printing table 100. Several guide rods 311 are fixedly connected to the top of the blocking plate 309. The surfaces of the guide rods 311 are slidably connected to the upper end of the inner wall of the printing table 100. Two bolts 310 are threadedly connected to the inner wall of the blocking plate 309. The surfaces of the bolts 310 are threadedly connected to the upper end of the inner wall of the printing table 100.
[0041] In this embodiment, when the surface of the ball screw 204 needs to be inspected, the two bolts 310 are rotated away from the inner wall of the printing table 100, and the blocking plate 309 is pulled to expose the ball screw 204. Lubricating oil can then be applied to the surface of the ball screw 204. After the inspection is completed, the guide rod 311 is slid into the inner wall of the printing table 100 so that the blocking plate 309 accurately seals the printing table 100. The bolts 310 are then screwed into the printing table 100 to fix the blocking plate 309 on the printing table 100.
[0042] like Figure 3 As shown, a ball bearing 306 is rolledly connected to the inner wall of the smooth plate 305, a support rod 307 is fixedly connected to the front end of the printing table 100, the inner wall of the smooth plate 305 is slidably connected to the surface of the support rod 307, two limiting rods 308 are fixedly connected to the front end of the printing table 100, and the inner wall of the drive frame 303 is slidably connected to the surface of the limiting rods 308.
[0043] Working principle: The telescopic end of the electric push rod 304 moves, driving the two smooth plates 305 to a suitable position via the drive frame 303. Then, the electric push rod 304 is automatically turned off, and the cardboard is placed on the conveyor belt. At this time, the two smooth plates 305 limit the movement of the cardboard. The light source on the lighting lamp 302 shines obliquely on the surface of the cardboard. The CCD camera 301 captures the image of the printing mark. The image processing system calculates the deviation between the current position and the target position. The image processing system calculates the position deviation and sends it to the control system in the CNC screen. At this time, the first servo motor 203 is automatically turned on. The output shaft of the first servo motor 203 rotates, driving the carriage 201 and the flexible printing roller 202 to a suitable position via the ball screw 204. Then, the first servo motor 203 is automatically turned off.
[0044] It should be noted that the printing table 100, carriage 201, flexible printing roller 202, first servo motor 203, ball screw 204, CCD camera 301, lighting lamp 302, electric actuator 304, conveyor belt, second servo motor, third servo motor, fourth servo motor, CNC screen, ink fountain and ink knife, etc. mentioned above are all components with relatively mature existing technology. The specific models can be selected according to actual needs. At the same time, the power supply for the first servo motor 203, CCD camera 301, lighting lamp 302, electric actuator 304, second servo motor, third servo motor, fourth servo motor, CNC screen and ink fountain can be powered by the built-in power supply or by AC power. The specific power supply method is selected according to the situation and will not be elaborated here.
[0045] The technical features of the above embodiments can be combined in any way. 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.
[0046] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.
Claims
1. A printing device for automatically adjusting the printing position, characterized in that, include: A printing table (100) is provided with a moving mechanism (200) on the upper surface of the printing table (100). The control mechanism (300) includes a lighting lamp (302) and a CCD camera (301) disposed on the surface of the moving mechanism (200). An electric push rod (304) is fixedly connected to the end of the printing table (100). A drive frame (303) is fixedly connected to the telescopic end of the electric push rod (304). Two optical slide plates (305) are slidably connected to the inner wall of the drive frame (303).
2. The printing apparatus for automatically adjusting the printing position according to claim 1, characterized in that, The moving mechanism (200) includes a ball screw (204) rotatably connected to the upper end of the inner wall of the printing table (100). A carriage (201) is slidably connected to the upper end of the inner wall of the printing table (100). The upper end of the inner wall of the carriage (201) is threadedly connected to the surface of the ball screw (204). A first servo motor (203) is fixedly connected to one side of the printing table (100). The output shaft of the first servo motor (203) is fixedly connected to one end of the ball screw (204). The tops of the lighting lamp (302) and the CCD camera (301) are both fixedly connected to the surface of the carriage (201). A flexible printing roller (202) is rotatably connected to the lower end of the inner wall of the carriage (201).
3. The printing apparatus for automatically adjusting the printing position according to claim 1, characterized in that, The printing table (100) has a blocking plate (309) on its upper surface.
4. The printing apparatus for automatically adjusting the printing position according to claim 3, characterized in that, The top of the blocking plate (309) is fixedly connected to several guide rods (311), and the surface of the guide rods (311) is slidably connected to the upper end of the inner wall of the printing table (100).
5. The printing apparatus for automatically adjusting the printing position according to claim 3, characterized in that, The inner wall of the blocking plate (309) is threaded with two bolts (310), and the surface of the bolts (310) is threaded to the upper end of the inner wall of the printing table (100).
6. The printing apparatus for automatically adjusting the printing position according to claim 1, characterized in that, The inner wall of the smooth plate (305) is connected with ball bearings (306).
7. The printing apparatus for automatically adjusting the printing position according to claim 1, characterized in that, The front end of the printing table (100) is fixedly connected to a support rod (307), and the inner wall of the smooth plate (305) is slidably connected to the surface of the support rod (307).
8. The printing apparatus for automatically adjusting the printing position according to claim 1, characterized in that, The front end of the printing table (100) is fixedly connected to two limiting rods (308), and the inner wall of the drive frame (303) is slidably connected to the surface of the limiting rods (308).