Anti-counterfeit printing device and method

A technology of anti-counterfeiting printing and printing table, applied in printing, printing machine, printing process and other directions, can solve the problems of affecting the quality of printing, unable to print continuously, low work efficiency, etc., to improve drying speed, improve printing quality, The effect of improving accuracy

Inactive Publication Date: 2018-01-09
合肥汇融文印有限责任公司
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AI-Extracted Technical Summary

Problems solved by technology

Bills are generally packaged in rolls, and they need to be unfolded for anti-counterfeiting printing. The unfolded bills tend to be bent under the action of stress, which affects the quality of printing in an uneven state, and easily causes overlapping printing content and skewe...
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Method used

Printing table 1 is provided with positioning block 5, the position of fixing printing paper 3, improves the accuracy rate of printing press printing, simultaneously fixing block 5 cooperates with the first pressure roller 4, makes printing paper 3 smoother, can not Curling occurs to improve the printing quality; the right side of the printing machine 6 is provided with a photoelectric sensor 7, which can effectively obtain the transmission speed of the printing paper 3, and then by adjusting the speed of the driving motor connected to the paper feed roller 2 and the roll roller 11, it can Avoid the impact on the printing quality due to the excessive speed of the paper feed roller 2 or the roll roll 11; before the roll is formed, it passes through the drying chamber 8, which improves the drying speed of the ink on the printing paper 3, and avoids the impact on the printing quality during the roll. When the ink is not dry, the adhesion phenomenon occurs. A partition 83 is arranged under the fan 81, and a through hole 82 is arranged on the partition 83, so that the wind blows in vertically to the printing paper 3, which can improve the quality of the printed pattern and ensure t...
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Abstract

The invention discloses an anti-counterfeiting printing device, comprising a printing table, a paper feed roller is connected to the entrance of the printing table, a first pressure roller is arranged at the entrance of the printing table, and a positioning block is arranged on the right side of the first pressure roller , the positioning block is provided with screws, the printing table is provided with screw holes corresponding to the screws, a printing machine is provided above the positioning block, a photoelectric sensor is provided on the right side of the positioning block, and the photoelectric sensor There is a drying chamber on the right side of the drying chamber, a fan is provided on the top of the drying chamber, a partition is provided at the lower end of the fan, a through hole is provided on the partition, and a proofreading room is provided on the right side of the drying chamber. , the interior of the pair of chambers is provided with an ultraviolet lamp and a high-speed camera, the right side of the proofreading room is provided with a punching device, the right side of the punching device is provided with a second pressure roller, and the exit of the printing table is connected with a roll roll. The invention can improve the printing efficiency of bills, and conveniently remove problematic bills.

Application Domain

Pattern printingInks +2

Technology Topic

Agricultural engineeringPrinting press +3

Image

  • Anti-counterfeit printing device and method
  • Anti-counterfeit printing device and method
  • Anti-counterfeit printing device and method

Examples

  • Experimental program(3)

Example Embodiment

[0026] Example 1
[0027] A method of anti-counterfeiting printing. The ink used by the printer is ultraviolet-induced color-changing anti-counterfeiting ink. Its components include: 35 parts of epoxy resin, 10 parts of phenolic resin, 12 parts of ultraviolet phosphor, 6 parts of dispersant, 4 parts of defoamer , 8 parts of calcium carbonate, 13 parts of ethyl acetate, and 12 parts of isopropanol; the preparation method of anti-counterfeiting ink includes the following steps: a) weighing, weighing the materials according to the proportion of each component described in claim 2 for use; b ) Stir, stir the epoxy resin, phenolic resin, ethyl acetate and isopropanol evenly, and stir at 500r/min for 40min; c) Conditioning, add ultraviolet phosphor, dispersant, defoamer, and calcium carbonate to the step b) In the obtained material, stir for 50min at 1000r/min to obtain the finished ink.

Example Embodiment

[0028] Example 2:
[0029] The method steps are the same as in Example 1, and the different process parameters are as follows:
[0030] 40 parts epoxy resin, 15 parts phenolic resin, 15 parts ultraviolet phosphor, 8 parts dispersant, 5 parts defoamer, 10 parts calcium carbonate, 15 parts ethyl acetate, 15 parts isopropanol;

Example Embodiment

[0031] Example 3:
[0032] The method steps are the same as in Example 1, and the different process parameters are as follows:
[0033] 30 parts of epoxy resin, 5 parts of phenolic resin, 8 parts of ultraviolet phosphor, 3 parts of dispersant, 2 parts of defoamer, 4 parts of calcium carbonate, 10 parts of ethyl acetate, 8 parts of isopropanol;
[0034] The printing table 1 is provided with a positioning block 5 to fix the position of the printing paper 3 to improve the printing accuracy of the printing press. At the same time, the fixing block 5 cooperates with the first pressing roller 4 to make the printing paper 3 smoother without curling , Improve the printing quality; the right side of the printing machine 6 is equipped with a photoelectric sensor 7, which can effectively obtain the conveying speed of the printing paper 3, and then by adjusting the speed of the driving motor connected to the paper feeding roller 2 and the roll 11, it can avoid The speed of the paper roller 2 or the roll 11 is too large to affect the printing quality; it passes through the drying chamber 8 before rolling, which improves the drying speed of the ink on the printing paper 3 and avoids the problem of ink Adhesion occurs when it is not dry. A partition 83 is provided under the fan 81, and a through hole 82 is provided on the partition 83, so that the wind blows into the printing paper 3 vertically, which can improve the quality of the printed pattern and ensure that the printing paper 3 is evenly exposed to the wind , There will be no partial non-drying phenomenon; the drying room 8 is equipped with a proofing room 9 on the right side, and the proofing room 9 is equipped with a UV lamp 91 and a high-speed camera 92. Because the printing machine 6 uses UV-activated color-changing anti-counterfeiting ink to carry out the printing paper 3 Printing, when the dried printing paper 3 is irradiated by the ultraviolet lamp 91, the correctly printed bill will appear discoloration, which can be recorded by the high-speed camera 91 and transmitted to the remote control terminal to facilitate the determination of errors in the printing paper 3 At the same time, a punching device 14 is provided at the exit of the proofreading room 9 for printed and missed bills. When a misprinted or missed bill occurs, the remote control terminal controls the punching device 14 to punch holes on the bills that have problems. It is convenient for the subsequent removal of wrong bills; the second pressing roller 10 is arranged on the left side of the roll 11, which can make the printing paper 3 smoother, and can make the printing paper 3 more tightly wound on the roll 11.
[0035] Working principle: At the beginning of printing, the printing paper 3 is conveyed by the paper feeding roller, first passes through the first pressing roller, so that the printing paper 3 is conveyed close to the printing table 1, and then enters the positioning block 5. Because the printing table 1 is equipped with multiple and positioning The screw holes 13 on the block 5 that match the screws 12 can adjust the distance between the positioning blocks 5 according to the different widths of the printing paper 3, so that the printing paper 3 can be better fixed, and it is convenient for the printing press 6 located above the positioning block 5 to print For the printing quality on paper 3, a photoelectric sensor 7 is installed on the right side of the printing machine 6 to measure the time required for the heads of two adjacent bills to pass the photoelectric sensor 7, and then transmit the result to the remote control terminal to determine the printing machine According to the printing rate, the remote control terminal controls the rotation speed of the drive motors of the paper feeding roller 2 and the roll forming roller 11, so that the paper feeding, printing and roll forming speeds of the printing paper 3 are kept the same without causing printing The paper 3 is too tight or too loose during the transmission process, which affects the printing result. The printing paper 3 passing through the photoelectric sensor 7 enters the drying chamber 8 for drying. The fan on the top of the drying chamber 8 blows downwards, and the wind blows from the partition 83 The through holes 82 are blown vertically on the printing paper 3, so that the printing paper 3 is evenly exposed to the wind, and there will be no partial dryness. The dried printing paper 3 enters the proofing room 9, and the UV lamp 91 in the proofing room 9 illuminates The printing paper 3 causes the UV-induced discoloration and anti-counterfeiting ink on the printing paper 3 to change color, which is recorded by the high-speed camera 92 in the proofreading room 9 and transmitted to the remote control terminal. When there are errors or missing printing, the high-speed camera The result recorded in 92 is inconsistent with the expected pattern. At this time, the remote control terminal sends an instruction to control the punching device 14 on the right side of the proofreading room 9 to work, and leave a mark on the problematic bill to facilitate subsequent removal of the problematic bill , The printing paper 3 in the proofreading room 9 comes out of the exit of the printing station 1 for rolling operation.

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Description & Claims & Application Information

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