Anti-counterfeit printing device and method

[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.

[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;

[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.