A precise overprinting device for varnish printing machine
By designing an accurate overprinting device in the mirror printing press, and using the benchmark paper jam adjustment component and the light-chasing camera for proofreading and correcting, the overprint inaccuracy caused by the lack of overprintable punctuation in mirror printing is solved, which improves printing accuracy and reduces the defective rate.
Patent Information
- Application Number
- CN202510203138.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-24
- Publication Date
- 2025-04-04
AI Technical Summary
During the printing process, the embossing printing press lacks color punctuation that can be traced to overprint, resulting in inaccurate overprinting, resulting in deviations in the printing paper position and defective products.
A precise overprinting device for a mimeograph printing machine is designed, including a support frame, a guide rod, a light-chasing camera, an adjustment roller and a benchmark paper jam adjustment component. By setting the marker paper jam adjustment component, it provides proof marks, light-chasing cameras for image acquisition, and deviation correction motors for deviation correction to ensure accurate alignment of the printing paper.
It improves the accuracy of polished printing, reduces the generation of defective products, and reduces production costs.
Smart Images
Figure CN119749057A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of precise overprinting for varnish printing machines, and in particular to a precise overprinting device for varnish printing machines. Background Art
[0002] The precise overprinting device of the varnish printing machine is to ensure that the images of different colors or different printing units can be accurately aligned and overprinted during the printing process, so as to achieve the expected printing effect. The precise overprinting device of the varnish printing machine is an important calibration and detection component used when the varnish printing machine is used. This device plays a vital role in the printing industry, especially in occasions that require high-precision overprinting, such as color printing, packaging printing, etc. In the existing printing process, varnish printing is placed at the last stage. Since varnish has no color, there is no color mark point that can be overprinted and tracked during printing, which will cause inaccurate overprinting, resulting in deviation in the position of the printing paper, and thus making the printed product defective. Summary of the invention
[0003] In view of the deficiencies in the prior art, the present invention provides a precise overprinting device for a varnish printing machine, which solves the technical problem of having no overprintable tracking color mark points during printing, thereby achieving the purpose of improving the accuracy of varnish printing.
[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a precise overprinting device for a varnish printing machine, comprising a support frame as a supporting base, a guide rod is fixedly connected between the support frames, two light-chasing cameras are slidably connected to the outer sides of the guide rod, an adjustment roller is arranged between the two support frames below the guide rod, and both sides of the adjustment roller are provided with a marking card adjustment component for assisting the light-chasing camera in image acquisition; The alignment cardboard adjustment component includes a probe groove opened on both sides of the adjustment roller, a plurality of splicing slide grooves are opened equidistantly on both sides of the adjustment roller, a closed transfer rod seat is fixedly connected to both sides of the adjustment roller by bolts, a plurality of filling blocks are slidably connected to the inner sides of the splicing slide grooves, one side of the filling block is slidably connected to the inner side of the splicing slide groove, a plurality of support frames are slidably connected to the inner sides of the probe grooves, and the ends of the support frames are respectively connected to the adjacent filling blocks, cardboard grooves are opened on the inner wall of the adjustment roller and the plurality of closed frames, observation windows are equidistantly opened on the outer sides of the closed frames and the outer sides of the adjustment roller, and an alignment paper ring is slidably connected to the inner sides of the cardboard grooves.
[0005] Preferably, a splicing limit assembly for limiting and fixing the marking paper ring and the filling block is provided inside the marking card paper adjustment assembly; The splicing limit assembly includes a limit slide groove opened on the inner side of the probe groove, a limit screw is fixedly connected in the middle of the inner side of the probe groove, a closed circular plate is sleeved on the outer side of the limit screw, and a rotating slide groove is opened on one end of the closed circular plate close to the closed transfer rod seat adjacent to it, a connecting slide rod is slidably connected to the inner side of the rotating slide groove, and the end of the connecting slide rod is fixedly connected to the limit seat, a marking paper limit bolt is spirally connected to one side of the limit seat, and a fastening limiter is spirally connected to one end of the closed circular plate close to the closed transfer rod seat on the outer side of the limit screw.
[0006] Preferably, the depth of the paper jam slot opened on the tube wall of the adjusting roller is less than the depth of the paper jam slot opened on the closing frame.
[0007] Preferably, the observation window and the limiting slide groove are both connected to the paper jam groove, and the observation windows equidistantly arranged on the tube wall of the adjusting roller are equidistantly distributed toward the middle part of the adjusting roller.
[0008] Preferably, the fastening limiter is a bolt limiter, and the end of the fastening limiter extends into the interior of the limiting slide groove.
[0009] Preferably, a docking rotating assembly for supporting printing paper is provided at the bottom end of one of the two support frames; The docking rotation assembly includes a connecting rod rotatably connected to the bottom end of the support frame, an end of the connecting rod is rotatably connected to a transfer seat, and an end of the transfer seat is rotatably connected to a deviation correction rod.
[0010] Preferably, a side support plate is fixedly connected to the opposite end of the other support frame, and a correction component for adjusting the angle of the docking rotation component is provided on the top of the side support plate; The correction component includes a correction motor installed on the top of the side support plate through a base, a transmission screw connected to the transmission end of the correction motor, a transmission connecting seat spirally connected to the outer side of the transmission screw, a rotating rod rotatably connected to the end of the transmission connecting seat, and a correction rod rotatably connected to the end of the rotating rod through a rotating shaft.
[0011] Preferably, the middle of the deflection correcting rod and the rotating rod are connected to the side support plate through a rotating shaft, and the end of the deflection correcting rod is rotatably connected to the end of the deflection correcting rod away from the connecting rod.
[0012] Preferably, the signal output end of the light-chasing camera is connected to the signal input end of the deviation-correcting motor through a control terminal.
[0013] Preferably, the two ends of the closed transfer rod seats are rotatably connected between adjacent support frames, and the outer diameter of the closed transfer rod seat is the same as the outer diameter of the adjustment drum.
[0014] By means of the above technical solution, the present invention provides a precise overprinting device for a varnish printing machine, which has at least the following beneficial effects: 1. Due to the setting of the alignment card paper adjustment component of the present invention, the paper card printed with the alignment mark can be embedded on both sides of the adjustment roller. Without changing the basic structure of the adjustment roller, there can be a calibration mark on the adjustment roller to facilitate the tracking camera to observe whether the paper on the adjustment roller is offset.
[0015] 2. Due to the setting of the splicing limit assembly, the present invention can change the position of the proofreading mark according to the width of the printed paper, and can limit and fix the splicing-installed alignment card paper adjustment assembly, and can limit and fix the paper printed with proofreading marks.
[0016] 3. Due to the setting of the deviation correction motor, the present invention can adjust the position of the paper to be printed after the tracking camera finds that the paper has deviated, thereby preventing the printing deviation from continuing to occur, reducing the number of defective products, and thus reducing the investment in production costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.
[0018] In the attached picture: Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the installation structure of the adjustment roller of the present invention; Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure at point A; Figure 4 For the present invention Figure 2 A schematic diagram of the enlarged structure at B; Figure 5 It is a schematic diagram of the installation structure of the closed transfer rod seat of the present invention; Figure 6 It is a schematic diagram of the installation structure of the closed frame of the present invention; Figure 7 It is a schematic diagram of the installation structure of the closed frame of the present invention; Figure 8 For the present invention Figure 6 A schematic diagram of the enlarged structure at C; Fig. 9 It is a schematic diagram of the installation structure of the fastening limiter of the present invention.
[0019] In the figure: 1. Support frame; 2. Guide rod; 3. Adjustment roller; 4. Alignment paper jam adjustment assembly; 41. Probe slot; 42. Splicing slide; 43. Closed transfer rod seat; 44. Filling block; 45. Closed frame; 46. Support frame; 47. Paper jam slot; 48. Observation window; 49. Alignment paper ring; 5. Splicing limit assembly; 51. Limit slide; 52. Limit screw; 53. Closed circular plate; 54. Rotating slide; 55. Connecting slide; 56. Limit seat; 57. Limit bolt for marking paper; 58. Fastening limiter; 6. Docking rotating assembly; 61. Connecting rod; 62. Adapter; 63. Correction rod; 7. Side support plate; 8. Correction assembly; 81. Correction motor; 82. Transmission screw; 83. Transmission connector; 84. Rotating rod; 85. Correction rod; 9. Light tracking camera. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0021] Embodiment 1:
[0022] In the existing printing process, varnish printing is placed at the last stage. Since varnish has no color, there is no color mark point that can be overprinted and tracked during printing, which will cause inaccurate overprinting and deviation in the position of the printing paper, resulting in defective printed products. Please refer to Figure 1-Figure 9 , a precise overprinting device for a varnish printing machine is provided for this embodiment, which solves the technical problem that the printing oil has no overprintable tracking color mark points. The device includes a support frame 1 as a supporting base, a guide rod 2 is fixedly connected above the support frames 1, and two light-chasing cameras 9 are slidably connected to the outer sides of the guide rod 2. An adjustment roller 3 is provided between the two support frames 1 below the guide rod 2, and both sides of the adjustment roller 3 are provided with a marking cardboard adjustment component 4 for assisting the light-chasing camera 9 in image acquisition. The printing paper being transmitted during printing is limited by the adjustment roller 3, and the marking cardboard adjustment component 4 is used to check whether the transmitted printing paper is offset. The light-chasing camera 9 observes whether the printing paper covers the marking cardboard adjustment component 4, thereby judging whether the printing paper is offset.
[0023] In the existing printing process, varnish printing is placed in the last stage. Since varnish has no color, there is no color mark point that can be overprinted and tracked during printing, which will cause inaccurate overprinting and deviation in printing position. In order to solve such problems, a marking cardboard adjustment component 4 is specially proposed. The marking paper jam adjustment component 4 includes an insertion groove 41 opened on both sides of the adjustment roller 3, a plurality of splicing grooves 42 are equidistantly opened on both sides of the adjustment roller 3, closed transfer rod seats 43 are fixedly connected to both sides of the adjustment roller 3 by bolts, a plurality of splicing grooves 42 are slidably connected to the inner sides of the plurality of splicing grooves, a closed frame 45 is slidably connected to one side of the filling block 44, a plurality of insertion grooves 41 are slidably connected to the inner sides of the splicing grooves 42, and a plurality of support frames 46 are slidably connected to the inner sides of the plurality of support frames 46, and the ends of the support frames 46 are respectively connected to the adjacent filling blocks 44, paper jam grooves 47 are opened on the inner wall of the adjustment roller 3 and the plurality of closed frames 45, observation windows 48 are equidistantly opened on the outer sides of the closed frames 45 and the outer sides of the adjustment roller 3, a marking paper ring 49 is slidably connected to the inner sides of the paper jam grooves 47, the ends of the two closed transfer rod seats 43 are rotatably connected between the adjacent support frames 1, and the outer diameter of the closed transfer rod seat 43 is the same as the outer diameter of the adjustment roller 3.
[0024] During the operation of the alignment card paper adjustment component 4, since the alignment card paper adjustment component 4 is installed in a splicing manner, in order to limit and fix the filling block 44. A splicing limit component 5 for limiting and fixing the alignment paper ring 49 and the filling block 44 is arranged on the inner side of the alignment card paper adjustment component 4. The splicing limit component 5 includes a limit slide groove 51 provided on the inner side of the probe groove 41, and a limit screw 52 is fixedly connected to the middle of the inner side of the probe groove 41. A closed circular plate 53 is sleeved on the outer side of the limit screw 52. A rotating slide groove 54 is provided on one end of the closed circular plate 53 close to the closed transfer rod seat 43. A connecting slide rod 55 is slidably connected to the inner side of the rotating slide groove 54. The end of the connecting slide rod 55 is fixedly connected to the limit seat 56. One side of the limit seat 56 A marking paper limit bolt 57 is spirally connected, and one end of the closed circular plate 53 close to the closed transfer rod seat 43 is located on the outside of the limit screw 52 and is spirally connected with a fastening limiter 58. The depth of the paper jam groove 47 opened on the tube wall of the adjusting roller 3 is less than the depth of the paper jam groove 47 opened on the closing frame 45. The observation window 48 and the limiting slide groove 51 are both connected to the paper jam groove 47. The observation windows 48 equidistantly opened on the tube wall of the adjusting roller 3 are equidistantly distributed toward the middle part of the adjusting roller 3. The fastening limiter 58 is a bolt limiter, and the end of the fastening limiter 58 extends into the interior of the limiting slide groove 51.
[0025] During the operation of the printing press, since varnish has no color, it is impossible to determine whether the varnish printing is offset. In order to solve this problem, colored calibration marks are sprayed on both sides of the adjustment roller 3. However, the polishing of the printing paper will quickly wear out the sprayed calibration marks. In order to make the marks usable for a long time, the calibration mark lines can be printed on the paper and the paper is pasted on the outside of the two ends of the adjustment roller 3. However, after the paper is pasted, it will become ineffective due to wear and tear, and the lamination process of the paper relative to the adjustment roller 3 must also be calibrated. In order to make the process faster and use it for a longer time, the operator can adjust the adjustment roller according to the width of the printed paper. 3 is adjusted, and the support frame 46 fixedly connected with the filling block 44 is slidably connected to the inside of the probe groove 41. During this period, the filling block 44 will slide and embed in the splicing slide groove 42. When the width extended by the number of stacked filling blocks 44 is greater than the width of the printing paper, the operation can be stopped. Then the operator slides the closing frame 45 to the inside of the probe groove 41, and then slides the closing circular plate 53 to the outside of the limiting screw 52 on the inside of the probe groove 41, and then screws the fastening limiter 58 to the outside of the limiting screw 52, so as to fix the closing circular plate 53. By fixing the closing circular plate 53, the stacked filling blocks 44 are limited and fixed. After the limit is completed, the operator slides the connecting slide rod 55 slidably connected inside the rotating slide groove 54 opened at one end of the closed circular plate 53 until the limit seat 56 at the end of the connecting slide rod 55 corresponds to the limit slide groove 51, and then rotates the marking paper limit bolt 57 spirally connected to one side of the limit seat 56 until the marking paper limit bolt 57 hits the marking paper ring 49 slidably connected inside the paper jam groove 47. After the marking paper ring 49 is fixed, the marking paper ring 49 inside the paper jam groove 47 can be observed through the observation window 48 opened on the adjustment roller 3 and the closing frame 45. When the printing paper passing through the adjustment roller 3 is offset, the paper will cover the observation window 48, thereby adjusting the marking paper ring 49. The marking paper ring 49 is blocked, and the tracking camera 9 will detect the marking mark printed on the marking paper ring 49 and send the collected image signal to the control terminal, so that the control terminal determines whether the printing paper is offset. In this way, the marking paper ring 49 can be slid and embedded in the paper jam slot 47 on the adjusting roller 3, so that the marking paper ring 49 does not directly contact the printing paper, which can avoid the marking paper ring 49 being damaged due to grinding. At the same time, it can also avoid the grinding consumption caused by direct printing on the adjusting roller 3 too quickly, and the marking position can be adjusted according to the paper width, which can also save the calibration time consumed when the marking paper ring 49 is pasted on the outside of the adjusting roller 3.
[0026] Embodiment 2:
[0027] On the basis of Example 1, Example 1 solves the technical problem that the printing oil has no overprintable tracking color mark point, but there is still the problem that the offset paper cannot be corrected. Figure 1-Figure 9 As shown, the specific implementation process is as follows: In order to cooperate with the adjustment roller 3 to clamp and fix the printing paper, a docking rotating assembly 6 for supporting the printing paper is arranged at the bottom end of one of the two support frames 1, and the docking rotating assembly 6 includes a connecting rod 61 rotatably connected to the bottom end of the support frame 1, and the end of the connecting rod 61 is rotatably connected to a transfer seat 62, and the end of the transfer seat 62 is rotatably connected to a correction rod 63.
[0028] After the light-chasing camera 9 detects that the paper is offset, it is necessary to correct the deviation of the paper. In order to achieve the correction operation, a correction component 8 is specially proposed. The other support frame 1 is fixedly connected to the side support plate 7 at the opposite end. The top of the side support plate 7 is provided with a correction component 8 for adjusting the angle of the docking rotation component 6. The correction component 8 includes a correction motor 81 installed on the top of the side support plate 7 through a base, a transmission screw 82 connected to the transmission end of the correction motor 81, and a transmission connecting seat 83 is spirally connected to the outer side of the transmission screw 82. The end of the transmission connecting seat 83 is rotatably connected to a rotating rod 84, and the end of the rotating rod 84 is rotatably connected to a correction rod 85 through a rotating shaft. The middle of the correction rod 85 and the rotating rod 84 are connected to the side support plate 7 through a rotating shaft, and the end of the correction rod 85 is rotatably connected to the end of the correction rod 63 away from the connecting rod 61.
[0029] In order to control the correction motor 81 to drive the correction assembly 8 to operate after the light-chasing camera 9 detects the deviation of the paper, so as to correct the deviation of the paper, the signal output end of the light-chasing camera 9 is connected to the signal input end of the correction motor 81 through the control terminal.
[0030] When the paper is offset, the control terminal will start the correction motor 81 through the control terminal according to the data observed by the tracking camera 9. At that time, the correction motor 81 will drive the transmission screw 82 connected to its transmission end to rotate, and the transmission connecting seat 83 spirally connected to the outer side of the transmission screw 82 will move, and the rotating rod 84 rotatably connected to the end of the transmission connecting seat 83 will rotate around its supporting shaft at the top of the side support plate 7, and the rotating rod 84 will drive the correction rod 85 rotatably connected to it to rotate, and the correction rod 85 will drive the correction rod 63 connected thereto to move. During this period, the adapter seat 62 rotatably connected to the other end of the correction rod 63 will rotate at the end of the connecting rod 61 connected thereto, and the output direction of the paper clamped by the correction rod 63 and the adjustment roller 3 is adjusted by rotating the correction rod 63, thereby achieving paper correction.
[0031] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.
[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A precision overprinting device for a varnish printing machine, comprising a support frame (1) as a supporting base, characterized in that: A guide rod (2) is fixedly connected above the support frames (1), two light-chasing cameras (9) are slidably connected to the outside of the guide rod (2), an adjustment roller (3) is provided below the guide rod (2) and between the two support frames (1), and both sides of the adjustment roller (3) are provided with a marking card adjustment component (4) for assisting the light-chasing camera (9) in image acquisition; The alignment cardboard adjustment component (4) comprises an insertion groove (41) provided on both sides of the adjustment roller (3), a plurality of splicing grooves (42) are equidistantly provided on both sides of the adjustment roller (3), a closed transfer rod seat (43) is fixedly connected to both sides of the adjustment roller (3) by bolts, a filling block (44) is slidably connected to the inner side of a plurality of the splicing grooves (42), a closed frame (45) is slidably connected to one side of the filling block (44) located inside the splicing groove (42), a plurality of support frames (46) are slidably connected to the inner side of a plurality of the insertion grooves (41), and ends of the support frames (46) are respectively connected to adjacent filling blocks (44), cardboard grooves (47) are provided on the inner wall of the adjustment roller (3) and the plurality of closed frames (45), observation windows (48) are equidistantly provided on the outer side of the closed frame (45) and the outer side of the adjustment roller (3), and an alignment paper ring (49) is slidably connected to the inner side of the cardboard groove (47).
2. The precise overprinting device for a varnish printing machine according to claim 1, characterized in that: A splicing limit assembly (5) for limiting and fixing the marking paper ring (49) and the filling block (44) is arranged inside the marking card paper adjustment assembly (4); The splicing limit assembly (5) comprises a limit slide groove (51) provided inside the probe groove (41), a limit screw (52) being fixedly connected to the middle of the inside of the probe groove (41), a closed circular plate (53) being sleeved on the outside of the limit screw (52), a rotating slide groove (54) being provided at one end of the closed circular plate (53) close to the closed transfer rod seat (43) adjacent thereto, a connecting slide rod (55) being slidably connected to the inside of the rotating slide groove (54), an end of the connecting slide rod (55) being fixedly connected to a limit seat (56), a marking paper limit bolt (57) being spirally connected to one side of the limit seat (56), and a fastening limiter (58) being spirally connected to one end of the closed circular plate (53) close to the closed transfer rod seat (43) adjacent thereto, which is located outside the limit screw (52).
3. The precise overprinting device for a varnish printing machine according to claim 1, characterized in that: The depth of the paper jam slot (47) provided on the tube wall of the regulating roller (3) is smaller than the depth of the paper jam slot (47) provided on the closing frame (45).
4. The precise overprinting device for a varnish printing machine according to claim 2, characterized in that: The observation window (48) and the limiting slide groove (51) are both connected to the paper jam groove (47), and the observation windows (48) are evenly spaced and arranged around the tube wall of the adjusting roller (3) and are evenly spaced and distributed toward the middle part of the adjusting roller (3).
5. The precise overprinting device for a varnish printing machine according to claim 2, characterized in that: The fastening stopper (58) is a bolt stopper, and the end of the fastening stopper (58) extends into the interior of the limiting sliding groove (51).
6. The precise overprinting device for a varnish printing machine according to claim 1, characterized in that: A docking rotating assembly (6) for supporting printing paper is disposed at the bottom end of one of the two support frames (1); The docking rotation assembly (6) comprises a connecting rod (61) rotatably connected to the bottom end of the support frame (1), the end of the connecting rod (61) is rotatably connected to a transfer seat (62), and the end of the transfer seat (62) is rotatably connected to a deviation correction rod (63).
7. The precise overprinting device for a varnish printing machine according to claim 6, characterized in that: The other supporting frame (1) is fixedly connected to a side supporting plate (7) at its opposite end, and a deviation correction component (8) for adjusting the angle of the docking rotating component (6) is provided at the top end of the side supporting plate (7); The deflection correction component (8) comprises a deflection correction motor (81) mounted on the top of the side support plate (7) via a base, a transmission screw (82) connected to the transmission end of the deflection correction motor (81), a transmission connection seat (83) being spirally connected to the outer side of the transmission screw (82), a rotational rod (84) being rotationally connected to the end of the transmission connection seat (83), and a deflection correction rod (85) being rotationally connected to the end of the rotation rod (84) via a rotation shaft.
8. The precise overprinting device for a varnish printing machine according to claim 7, characterized in that: The middle of the deflection correcting rod (85) and the rotating rod (84) are connected to the side support plate (7) via a rotating shaft, and the end of the deflection correcting rod (85) is rotatably connected to the end of the deflection correcting rod (63) away from the connecting rod (61).
9. The precise overprinting device for a varnish printing machine according to claim 7, characterized in that: The signal output end of the light-chasing camera (9) is connected to the signal input end of the deviation-correcting motor (81) via a control terminal.
10. The precise overprinting device for a varnish printing machine according to claim 1, characterized in that: The ends of the two closed transfer rod seats (43) are rotatably connected between adjacent support frames (1), and the outer diameter of the closed transfer rod seat (43) is the same as the outer diameter of the adjustment roller (3).