Gravure online code spraying device

Abstract

The utility model discloses a gravure online code spraying device, which comprises a conveying mechanism, a printing mechanism, a drying oven, a jet printing mechanism, a UV (ultraviolet) curing mechanism and a control system, and is characterized in that the printing mechanism, the drying oven, the jet printing mechanism and the UV curing mechanism are sequentially arranged from front to back along the conveying direction of the conveying mechanism; signal input ends of the conveying mechanism, the jet printing mechanism and the UV curing mechanism are electrically connected with corresponding signal output ends of the control system respectively; the jet printing device is characterized in that the UV curing mechanism comprises a curing mechanism support and at least one UV curing unit, and the curing mechanism support is provided with a position adjusting device capable of adjusting the distance between the UV curing unit and the jet printing mechanism. According to the gravure online code spraying device, the distance between the UV curing mechanism and the jet printing mechanism can be adjusted according to the actual jet printing condition, so that the ink after jet printing has proper leveling time before curing, and the jet printing quality is ensured.

Description

Technical Field

[0001] The utility model relates to printing equipment, in particular to an intaglio printing on-line ink jet coding device. Background Art

[0002] As a data carrier, a two-dimensional code has both data storage function and anti-counterfeiting function, and is currently widely used on packaging boxes. One is for data traceability, and the other is to ensure the integrity of the data chain. At present, there are many types of two-dimensional code ink jet coding devices on the market, including off-line and on-line methods. The off-line method separates the printing of the basic patterns and texts on the paper from the ink jet printing of the two-dimensional code on different devices. The on-line method is to connect intaglio printing and ink jet coding, so that the paper can complete printing and ink jet coding on the same device. Although the on-line method has higher efficiency, in the current ink jet coding devices, since the distance between the ink jet printing mechanism and the UV curing mechanism is fixed, and the production speeds of different products are not the same, there are often defects such as white showing or blurring of the two-dimensional code caused by too long or too short leveling time of the ink jet printing ink for some products. Therefore, in the same intaglio printing on-line ink jet coding device, for products with different production speeds, the quality of the ink jet printed two-dimensional code will also have a large difference, and it is difficult to ensure the printing quality. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide an intaglio printing on-line ink jet coding device, which can adjust the distance between the UV curing mechanism and the ink jet printing mechanism according to the actual ink jet printing situation, so that the ink after ink jet printing has a suitable leveling time before curing, and ensure the printing quality.

[0004] In order to solve the above technical problems, the following technical solutions are adopted:

[0005] An intaglio printing on-line ink jet coding device includes a conveying mechanism, a printing mechanism, an oven, an ink jet printing mechanism, a UV curing mechanism and a control system. Along the conveying direction of the conveying mechanism, the printing mechanism, the oven, the ink jet printing mechanism and the UV curing mechanism are arranged in sequence from front to back. The signal input ends of the conveying mechanism, the ink jet printing mechanism and the UV curing mechanism are respectively electrically connected to the corresponding signal output ends of the control system. It is characterized in that: the UV curing mechanism includes a curing mechanism bracket and at least one UV curing unit, and a position adjusting device capable of adjusting the distance between the UV curing unit and the ink jet printing mechanism is arranged on the curing mechanism bracket.

[0006] When the above intaglio in-line inkjet coding device is working, the paper is printed with basic patterns and texts on the printing mechanism, and is conveyed to the inkjet printing mechanism after being dried in the oven; when the paper is conveyed to the inkjet printing mechanism, the inkjet printing mechanism sprays a two-dimensional code on the corresponding position of the paper (spraying with UV-curable ink); after the spraying is completed, the paper is conveyed to the UV curing mechanism, and the UV curing mechanism cures the two-dimensional code sprayed on the paper; finally, the paper is sent out after the two-dimensional code is cured. Before processing the paper, the leveling time required when different inks are sprayed on different papers can be calculated first; then the required leveling distance can be obtained from the conveying speed of the paper and the leveling time; the position of the UV curing unit is adjusted by the position adjusting device until the distance between the UV curing unit and the inkjet printing mechanism is the required leveling distance. This intaglio in-line inkjet coding device can adjust the distance between the UV curing mechanism and the inkjet printing mechanism according to the actual printing situation, so that the sprayed ink has a suitable leveling time, ensuring that the sprayed two-dimensional code is neither white nor blurred, ensuring the printing quality and not causing waste products.

[0007] In a preferred solution, the signal input end of the position adjusting device is electrically connected to the corresponding signal output end of the control system. The position adjusting device adopts an automatic adjusting device, and the control system controls the position adjusting device to adjust the position of the UV curing unit. In the above control system, a matching data table between various papers and various inks (that is, the leveling time required when different inks are sprayed on different papers) is usually preset. When in use, only the paper conveying speed needs to be input, and the types of paper and ink are selected, and the control system can select the corresponding leveling time according to the matching data table and automatically calculate the required leveling distance.

[0008] The above position adjusting device can also be adjusted manually. The staff moves the UV curing unit to a suitable position through the position adjusting device according to the obtained leveling distance; in the case of manual adjustment, the position adjusting device can adopt a combination of a mounting frame, a slider and a slide rail. The UV curing unit is installed on the mounting frame, the slider is installed on the mounting frame, the slide rail is installed on the curing mechanism bracket, the slider is movably arranged on the slide rail, and a scale is provided on the slide rail.

[0009] In a further preferred solution, the position adjustment device includes a mounting frame, a driving mechanism and at least two guide rails. The UV curing unit and the driving mechanism are respectively mounted on the mounting frame. Each guide rail is arranged on the curing mechanism bracket and is parallel to each other, and the guide rail is parallel to the conveying direction of the conveying mechanism. At least two guide wheels respectively in rolling cooperation with each guide rail are arranged on the mounting frame, and at least one of the guide wheels is in transmission connection with the power output end of the driving mechanism. The signal input end of the driving mechanism is electrically connected to the corresponding signal output end of the control system. During adjustment, the driving mechanism (a servo motor with a self-locking function can be adopted) drives the guide wheel to rotate, so that the mounting frame moves horizontally along the guide rail. Generally, the part of the conveying mechanism corresponding to the guide rail is a straight section.

[0010] In another further preferred solution, the position adjustment device includes a mounting frame, a conveying motor, a driving roller, a driven roller and two synchronous belts. The UV curing unit is mounted on the mounting frame. The driving roller and the driven roller are rotatably mounted on the curing mechanism bracket, the conveying motor is mounted on the curing mechanism bracket, the driving roller is in transmission connection with the power output shaft of the conveying motor. One of the synchronous belts is tensioned on one end of the driving roller and the driven roller, and the other synchronous belt is tensioned on the other end of the driving roller and the driven roller, and both synchronous belts are parallel to the conveying direction of the conveying mechanism. Both sides of the mounting frame are respectively connected to the advancing sections of the two synchronous belts. The signal input end of the conveying motor is electrically connected to the corresponding signal output end of the control system. During adjustment, the conveying motor drives the driving roller to drive the synchronous belt, so that the mounting frame moves back and forth along with the advancing section of the synchronous belt.

[0011] In another further preferred solution, a rack and two guide rails are arranged on the curing mechanism bracket, and the rack and the two guide rails are parallel to the conveying direction of the conveying mechanism. The position adjustment device includes a mounting frame, a servo motor, a gear and two sliders. The servo motor and the two sliders are both mounted on the mounting frame. The two sliders correspond to the two guide rails one by one, and the slider is in sliding cooperation with the corresponding guide rail. The gear is rotatably mounted on the mounting frame, the gear is respectively in transmission connection with the power output end of the servo motor, and the gear meshes with the rack. During adjustment, the servo motor (a servo motor with a self-locking function can be adopted) drives the gear to rotate, so that the mounting frame moves horizontally along the guide rail.

[0012] In a further preferred solution, the number of the UV curing units is multiple, and each UV curing unit is arranged side by side on the mounting frame. The number of the UV curing units can be configured according to the requirements of the product. When performing two-dimensional code spraying on multiple areas on the same piece of paper, the corresponding number of UV curing units can be set to cure the two-dimensional codes in each area respectively. The above-mentioned UV curing unit can adopt a UV lamp.

[0013] In a preferred embodiment, the gravure in-line coding device further includes a coaxial encoder and a color mark sensor. The conveying mechanism includes a plurality of guide rollers, and the guide rollers are arranged in sequence along the conveying direction. The coaxial encoder is coaxially installed on the guide roller in front of the printing mechanism, and the color mark sensor is located above this guide roller. The signal output end of the color mark sensor is electrically connected to the signal input ends corresponding to the control system and the coaxial encoder respectively, and the signal output end of the coaxial encoder is electrically connected to the signal input end corresponding to the control system.

[0014] When the color mark sensor detects the color mark on the paper (the paper is printed with color marks for positioning), the color mark sensor simultaneously sends information to the control system and the coaxial encoder. At this time, the coaxial encoder counts (counts the paper feeding distance according to the rotation speed of the guide roller). When the preset paper feeding distance is reached, the coaxial encoder sends a signal to the control system, and the control system controls the printing mechanism to print on the paper. At this time, the printing position is the area to be printed on the paper. By using the cooperation method of the coaxial encoder and the color mark sensor, the accuracy of the position during printing can be guaranteed. At the same time, after the color mark sensor detects the color mark, it directly sends information to the coaxial encoder to make the coaxial encoder directly count. Compared with the method of controlling the coaxial encoder to count through the control system, it can reduce the delay problem of intermediate signal transmission and further improve the accuracy. After the color mark sensor detects the color mark, it also sends information to the control system for the convenience of the staff for background monitoring.

[0015] In a preferred embodiment, the gravure in-line coding device further includes a vision detection system. Along the conveying direction of the conveying mechanism, the vision detection system is located behind the UV curing mechanism. The signal output end of the vision detection system is electrically connected to the signal input end corresponding to the control system. The vision detection system can detect the two-dimensional code printed and cured on the paper to judge whether the two-dimensional code is qualified, which is convenient for removing defective products in subsequent processes.

[0016] In a preferred embodiment, the gravure in-line coding device further includes a cooling roller. Along the conveying direction of the conveying mechanism, the cooling roller is arranged behind the oven. The cooling roller can cool down the paper after drying to make the paper more flat when it reaches the printing mechanism.

[0017] The above-mentioned printing mechanism, oven, cooling roller, and printing mechanism can all adopt existing technologies and will not be elaborated here. The above-mentioned control system can adopt a computer. The above-mentioned vision detection system can adopt a camera.

[0018] The beneficial effect of the present invention is that this gravure in-line coding device can adjust the distance between the UV curing mechanism and the printing mechanism according to the actual printing situation, so that the printed ink has a suitable leveling time before curing, ensuring the printing quality. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the gravure in-line inkjet coding device in Embodiment 1 of the present utility model;

[0020] Figure 2 It is a top view of the UV curing mechanism in Embodiment 1 of the present utility model;

[0021] Figure 3 It is a rear view of the UV curing mechanism in Embodiment 1 of the present utility model;

[0022] Figure 4 It is a top view of the UV curing mechanism in Embodiment 2 of the present utility model;

[0023] Figure 5 It is a side view when the position adjusting device and the UV curing unit cooperate in Embodiment 2 of the present utility model. Detailed implementation manners

[0024] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0025] Embodiment 1, as Figures 1-3 shown, a gravure in-line inkjet coding device includes a conveying mechanism 1, a printing mechanism 2, an oven 3, an inkjet printing mechanism 4, a UV curing mechanism 5 and a control system (not shown in the figure). Along the conveying direction of the conveying mechanism 1, the printing mechanism 2, the oven 3, the inkjet printing mechanism 4 and the UV curing mechanism 5 are arranged in sequence from front to back; the UV curing mechanism 5 includes a curing mechanism bracket 501 and a plurality of UV curing units 502. A position adjusting device 503 capable of adjusting the distance between the UV curing unit 502 and the inkjet printing mechanism 4 is provided on the curing mechanism bracket 501; the signal input ends of the conveying mechanism 1, the inkjet printing mechanism 4 and the position adjusting device 503 are respectively electrically connected to the corresponding signal output ends of the control system.

[0026] When the above-mentioned gravure inline coding device is working, the basic pattern and text are printed on the paper on the printing mechanism 2, and the paper is transported to the printing mechanism 4 after being dried in the oven 3; when the paper is transported to the printing mechanism 4, the printing mechanism 4 prints the two-dimensional code on the corresponding position on the paper (using UV curing ink for printing); after the printing is completed, the paper is transported to the UV curing mechanism 5, and the UV curing mechanism 5 cures the two-dimensional code printed on the paper; finally, the paper is sent out after the two-dimensional code is cured. Before processing the paper, the required leveling time when different inks are printed on different papers can be calculated first; then the required leveling distance can be obtained through the paper conveying speed and the leveling time; the control system adjusts the position of the UV curing unit 502 by controlling the position adjustment device 503 until the distance between the UV curing unit 502 and the printing mechanism 4 is the required leveling distance; in the above control system, there is usually a preset matching data table between various papers and various inks (i.e., the required leveling time when different inks are printed on different papers). When using, only the paper conveying speed and the type of paper and ink need to be input, and the control system can select the corresponding leveling time according to the matching data table and automatically calculate the required leveling distance. This gravure inline coding device can adjust the distance between the UV curing mechanism 5 and the printing mechanism 4 according to the actual printing situation, so that the ink after printing has a suitable leveling time, ensuring that the two-dimensional code after printing is neither white nor blurred, ensuring the printing quality, and not causing waste.

[0027] The position adjustment device 503 includes a mounting frame 5031, a driving mechanism 5032 and two guide rails 5033. Each UV curing unit 502 and the driving mechanism 5032 are respectively mounted on the mounting frame 5031, and each UV curing unit 502 is arranged side by side; each guide rail 5033 is arranged on the curing mechanism bracket 501 and is parallel to each other, and the guide rail 5033 is parallel to the conveying direction of the conveying mechanism 1; the mounting frame 5031 is provided with two guide wheels 5034 respectively rollingly matched with each guide rail 5033, and one of the guide wheels 5034 is connected to the power output end of the driving mechanism 5032. During adjustment, the driving mechanism 5032 (using a servo motor) drives the guide wheel 5034 to rotate, so that the mounting frame 5031 is translated along the guide rail 5033. The portion of the conveying mechanism 1 corresponding to the guide rail 5033 is a straight section. The number of UV curing units 502 can be configured according to product requirements. When printing two-dimensional codes in multiple regions on the same paper, a corresponding number of UV curing units 502 can be set to cure the two-dimensional codes in each region. The UV curing unit 502 uses a UV lamp.

[0028] The gravure in-line inkjet coding device further includes a coaxial encoder 6 and a color mark sensor 7. The conveying mechanism 1 includes a plurality of guide rollers 101, and the guide rollers 101 are arranged in sequence along the conveying direction. The coaxial encoder 6 is coaxially installed on the guide roller 101 in front of the inkjet printing mechanism 4, and the color mark sensor 7 is located above the guide roller 101. The signal output end of the color mark sensor 7 is electrically connected to the signal input ends corresponding to the control system and the coaxial encoder 6 respectively, and the signal output end of the coaxial encoder 6 is electrically connected to the signal input end corresponding to the control system.

[0029] When the color mark sensor 7 detects the color mark on the paper (the paper is printed with a color mark for positioning), the color mark sensor 7 simultaneously sends information to the control system and the coaxial encoder 6. At this time, the coaxial encoder 6 counts (counts the paper feeding distance according to the rotation speed of the guide roller 101). When the preset paper feeding distance is reached, the coaxial encoder 6 sends a signal to the control system, and the control system controls the inkjet printing mechanism 4 to print on the paper. At this time, the printing position is the area to be printed on the paper. By using the cooperation method of the coaxial encoder 6 and the color mark sensor 7, the accuracy of the position during printing can be guaranteed. At the same time, after the color mark sensor 7 detects the color mark, it directly sends information to the coaxial encoder 6 to make the coaxial encoder 6 directly count. Compared with the method of controlling the coaxial encoder 6 to count through the control system, it can reduce the delay problem of intermediate signal transmission and further improve the accuracy. After the color mark sensor 7 detects the color mark, it also sends information to the control system for the convenience of the staff for background monitoring.

[0030] The gravure in-line inkjet coding device further includes a vision detection system 8. Along the conveying direction of the conveying mechanism 1, the vision detection system 8 is located behind the UV curing mechanism 5. The signal output end of the vision detection system 8 is electrically connected to the signal input end corresponding to the control system. The vision detection system 8 can detect the two-dimensional code printed and cured on the paper to judge whether the two-dimensional code is qualified, which is convenient for removing waste products in subsequent processes.

[0031] The gravure in-line inkjet coding device further includes a cooling roller 9. Along the conveying direction of the conveying mechanism 1, the cooling roller 9 is arranged behind the oven 3. The cooling roller 9 can cool down the paper after drying to make the paper smoother when it reaches the inkjet printing mechanism 4.

[0032] The above printing mechanism 2, oven 3, cooling roller 9, and inkjet printing mechanism 4 all adopt existing technologies and will not be elaborated here. The above control system adopts a computer. The above vision detection system 8 adopts a camera.

[0033] Embodiment 2. The difference between this embodiment and Embodiment 1 is that as Figures 4-5As shown, the position adjusting device 503' includes a mounting frame 5031', a conveying motor 5032', a driving roller 5033', a driven roller 5034' and two synchronous belts 5035'. The UV curing unit 502' is mounted on the mounting frame 5031'. The driving roller 5033' and the driven roller 5034' are rotatably mounted on the curing mechanism bracket 501'. The conveying motor 5032' is mounted on the curing mechanism bracket 501'. The driving roller 5033' is in transmission connection with the power output shaft of the conveying motor 5032'. One of the synchronous belts 5035' is tensioned on one end of the driving roller 5033' and the driven roller 5034', and the other synchronous belt 5035' is tensioned on the other end of the driving roller 5033' and the driven roller 5034'. And the two synchronous belts 5035' are both parallel to the conveying direction of the conveying mechanism. Both sides of the mounting frame 5031' are respectively connected to the forward sections of the two synchronous belts 5035'. During adjustment, the conveying motor 5032' drives the driving roller 5033' to drive the synchronous belt 5035', so that the mounting frame 5031' moves back and forth along with the forward section of the synchronous belt 5035'.

[0034] Embodiment 3. The difference between this embodiment and Embodiment 1 is that: a rack and two guide rails are provided on the curing mechanism bracket. The rack and the two guide rails are parallel to the conveying direction of the conveying mechanism. The position adjusting device includes a mounting frame, a servo motor, a gear and two sliders. The servo motor and the two sliders are both mounted on the mounting frame. The two sliders correspond to the two guide rails one by one. The slider is in sliding fit with the corresponding guide rail. The gear is rotatably mounted on the mounting frame. The gear is respectively in transmission connection with the power output end of the servo motor, and the gear meshes with the rack. During adjustment, the servo motor (a servo motor with a self-locking function can be used) drives the gear to rotate, so that the mounting frame moves horizontally along with the guide rail accordingly.

Claims

1. A gravure inline inkjet device, comprising a conveying mechanism, a printing mechanism, an oven, a printing mechanism, a UV curing mechanism and a control system, wherein the printing mechanism, the oven, the printing mechanism and the UV curing mechanism are arranged in sequence from front to back along the conveying direction of the conveying mechanism, and the signal input ends of the conveying mechanism, the printing mechanism and the UV curing mechanism are electrically connected to the corresponding signal output ends of the control system respectively; characterized in that: The UV curing mechanism comprises a curing mechanism bracket and at least one UV curing unit. The curing mechanism bracket is provided with a position adjustment device capable of adjusting the distance between the UV curing unit and the printing mechanism.

2. A gravure inline inkjet device as claimed in claim 1, characterized in that: The signal input end of the position adjustment device is electrically connected to the corresponding signal output end of the control system.

3. A gravure inline inkjet device as claimed in claim 2, characterized in that: The position adjustment device includes a mounting frame, a driving mechanism and at least two guide rails, wherein the UV curing unit and the driving mechanism are respectively mounted on the mounting frame; each guide rail is arranged on a curing mechanism bracket and is parallel to each other, and the guide rail is parallel to the conveying direction of the conveying mechanism; the mounting frame is provided with at least two guide wheels respectively rollingly matched with each guide rail, wherein at least one guide wheel is transmission-connected to the power output end of the driving mechanism; and the signal input end of the driving mechanism is electrically connected to the signal output end corresponding to the control system.

4. A gravure inline inkjet device as claimed in claim 2, characterized in that: The position adjustment device comprises a mounting frame, a conveying motor, an active roller, a driven roller and two synchronous belts, wherein the UV curing unit is mounted on the mounting frame; the active roller and the driven roller can be rotatably mounted on a curing mechanism bracket, the conveying motor is mounted on the curing mechanism bracket, the active roller is drivingly connected to a power output shaft of the conveying motor, one synchronous belt is tensioned on one end of the active roller and the driven roller, the other synchronous belt is tensioned on the other end of the active roller and the driven roller, and both synchronous belts are parallel to the conveying direction of the conveying mechanism; both sides of the mounting frame are respectively connected to the forward sections of the two synchronous belts; the signal input end of the conveying motor is electrically connected to the signal output end corresponding to the control system.

5. A gravure inline inkjet device as claimed in claim 2, characterized in that: A rack and two guide rails are provided on the curing mechanism bracket, and the rack and the two guide rails are parallel to the conveying direction of the conveying mechanism; the position adjustment device includes a mounting frame, a servo motor, a gear and two sliders, the servo motor and the two sliders are mounted on the mounting frame, the two sliders correspond to the two guide rails one by one, the sliders slide in cooperation with the corresponding guide rails, the gears are rotatably mounted on the mounting frame, the gears are respectively connected to the power output end of the servo motor, and the gears are meshed with the racks.

6. A gravure inline inkjet printer as claimed in any one of claims 3 to 5, characterized in that: There are multiple UV curing units, and each UV curing unit is installed side by side on the mounting frame.

7. The gravure inline inkjet device according to claim 1, characterized in that: The gravure in-line inkjet coding device also includes a coaxial encoder and a color mark sensor. The conveying mechanism includes a plurality of guide rollers, each of which is arranged in sequence along the conveying direction. The coaxial encoder is coaxially mounted on the guide roller in front of the printing mechanism, and the color mark sensor is located above the guide roller. The signal output end of the color mark sensor is electrically connected to the control system and the signal input end corresponding to the coaxial encoder, respectively, and the signal output end of the coaxial encoder is electrically connected to the signal input end corresponding to the control system.

8. The gravure inline inkjet device according to claim 1, characterized in that: The gravure inline coding device also includes a visual detection system, which is located behind the UV curing mechanism along the conveying direction of the conveying mechanism, and the signal output end of the visual detection system is electrically connected to the corresponding signal input end of the control system.

9. The gravure inline inkjet device according to claim 1, characterized in that: The gravure inline inkjet coding device also includes a cooling roller, which is arranged behind the oven along the conveying direction of the conveying mechanism.

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