Preparation process and preparation device of anti-counterfeiting printing ink

Abstract

The application discloses a kind of anti-fake printing oil preparation process and preparation device, it is related to printing oil preparation field, including the following steps: step one, weighing raw materials, step two, raw material grinding, step three, tabletting treatment, step four, furnace firing, step five, embryo sheet impurity removal, step six, embryo sheet post-processing, step seven, printing oil preparation.The printing oil in the application can be seen under 980nm laser irradiation by industrial camera that there is obvious green luminescence on the surface of toner at cross-hatching, that is, the phenomenon that printing oil covers on the surface of toner, the use of this printing oil can better overcome the background light interference of paper, and it is of great significance for judging the timing of ink in document inspection;The printing oil preparation process and preparation device in the application can reduce the impurities in NaYF4:Yb,Er micron fluorescent powder, and the sintered tablet directly enters the sintered sheet impurity removal box after sintering, and is transported by mechanical hand and vacuum suction pen throughout the process, to avoid artificial contact and secondary pollution.

Description

TECHNICAL FIELD

[0001] The present application mainly relates to the technical field of printing ink preparation, and particularly relates to a preparation process of anti-fake printing ink and a preparation device thereof. BACKGROUND

[0002] With the continuous upgrading of the demand for anti-fake of bills, certificates and high-value packaging, the anti-fake printing ink prepared by using rare earth doped up-conversion fluorescent material has become an important technical path for document inspection and brand tracing due to the advantages of single excitation wavelength, pure color emission, invisible to the naked eye but easy to identify by instruments and the like. Among them, the NaYF4:Yb,Er system is widely used due to high quantum efficiency and excellent chemical stability, and the preparation level directly determines the luminescence intensity, dispersion stability and developing ability at the cross stroke of the ink powder of the printing ink.

[0003] The existing process usually simply mixes rare earth fluorides, then high-temperature solid-phase sintering is performed, and then manual crushing, screening and direct stirring with commercial printing ink are performed. The route has the following defects: the surface of the sintered green body piece is adhered with quartz sand, activated carbon and metal oxides, manual impurity removal is not thorough, resulting in high impurity content of the final powder and luminescence quenching; the crushing, screening and cleaning links are open operations, dust escape is serious, the particle size distribution is wide, and the printing ink is prone to sedimentation; there is lack of an online turning mechanism and a broken green piece removing mechanism, two-sided cleaning is difficult to achieve, and broken slag contaminates the subsequent batches; the fluorescent powder and printing ink ratio and dispersion process are extensive, and after stamping, brightness unevenness and serious background fluorescence interference occur under laser irradiation, which affects the accuracy of the ink timing determination.

[0004] Therefore, there is an urgent need for a preparation method capable of continuously preparing high-purity NaYF4:Yb,Er fluorescent powder and automatically removing impurities in a fully closed manner. SUMMARY

[0005] Based on this, the purpose of the present application is to provide an anti-fake printing ink preparation process and a preparation device thereof to solve the technical problems in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: the present application provides an anti-fake printing ink preparation process, which comprises the following steps: step one, weighing raw materials, for preparing Er 3+ ion doping concentration of 2%, Yb 3+The NaYF4 fluorescent powder with ion doping concentration of 20% is prepared by taking NaF, YF3, YbF3 and ErF3 according to the stoichiometric ratio, and all the raw materials are anhydrous fluoride powder; in step two, the raw materials are ground by using a planetary ball mill to grind the NaF, YF3, YbF3 and ErF3 powder respectively, and after grinding, the powder is passed through a 400-mesh sieve; in step three, the tablet processing, the ground NaF, YF3, YbF3 and ErF3 powder is mixed, and after mixing, the mixed powder is placed in a stainless steel mold, and the green compact tablet one is obtained by pressing; in step four, the furnace firing, three to five millimeters of dry quartz sand is laid at the bottom of the small crucible, and after the green compact tablet one is placed, it is buried with quartz sand, and one centimeter of activated carbon particles is laid at the bottom of the large crucible, the small crucible is placed in the large crucible, and the large crucible is placed in the muffle furnace constant temperature zone; in step five, the green compact tablet is removed, the fired green compact tablet one is placed in the sintered tablet placement opening of the sintered tablet removal box, the green compact tablet one is moved to the turning device by the sintered tablet transfer device, the green compact tablet one is sequentially moved to the mechanical stripping device, the ultrasonic cleaning device, the washing device and the drying device for impurity removal, and after the impurity removal, the green compact tablet two is obtained and moved to the sintered tablet placement opening by the sintered tablet transfer device; in step six, the green compact tablet post-processing, the green compact tablet two is ground by using a planetary ball mill, and after grinding, it is passed through a 200-mesh sieve to obtain NaYF4:Yb,Er micron fluorescent powder; in step seven, the printing oil preparation, NaYF4:Yb,Er micron fluorescent powder and printing oil are weighed according to the mass ratio of one to ten, the NaYF4:Yb,Er micron fluorescent powder is added to the printing oil and continuously stirred for 24 hours by using a magnetic stirrer to obtain the anti-fake printing oil.

[0007] According to the technical scheme of the anti-fake printing oil preparation process, a preparation device for the anti-fake printing oil preparation process is also provided, which includes a sintered tablet removal box, a sintered tablet placement opening arranged at one end of the sintered tablet removal box, and a turning device, a breaking detection device, a mechanical stripping device, a washing device, a drying device and an ultrasonic cleaning device arranged in the sintered tablet removal box in sequence away from the sintered tablet placement opening, the turning device includes a horizontal plate, a plurality of rotating frames arranged in linear array and penetrating through the horizontal plate, a plurality of positioning rings arranged in linear array on the rotating frames, two magnetic cover lids symmetrically arranged on the top and bottom of the positioning rings, and a driving component arranged on one side of the horizontal plate and used to simultaneously drive a plurality of rotating frames to rotate; the device also includes a magnetic cover opening component arranged on the side of the horizontal plate away from the driving component and having an execution end extending to the upper part of the horizontal plate, and a cover lid transfer component arranged at the bottom of the sintered tablet removal box.

[0008] According to one embodiment of the present application, the magnetic cover opening component comprises a first linear module arranged on the outer wall of the horizontal plate, an L-shaped moving plate arranged at the execution end of the first linear module, a first driving cylinder arranged on the top of the L-shaped moving plate and penetrating through the L-shaped moving plate at the execution end, a first lifting plate arranged at the execution end of the first driving cylinder, a plurality of positioning frames linearly arranged on the bottom of the first lifting plate, and a plurality of electromagnetic blocks arranged on the bottom of the positioning frames; the cover transfer component is the same in structure as the magnetic cover opening component. In the preferred embodiment, the magnetic cover on the top of the horizontal plate is opened by the magnetic cover opening component, and the magnetic cover on the bottom of the horizontal plate is transferred by the cover transfer component.

[0009] According to one embodiment of the present application, the driving component comprises a first gear arranged at the end of the rotating frame, a second gear arranged on the bottom of the horizontal plate and located between two adjacent first gears, a support frame arranged on the outer wall of the horizontal plate, and a stepping motor arranged on the outer wall of the support frame and used for driving one of the first gears to rotate. In the preferred embodiment, the driving component is used for stably rotating the plurality of rotating frames.

[0010] According to one embodiment of the present application, the sintered sheet transfer device arranged on the inner wall top of the sintered sheet impurity removal box comprises a second linear module arranged on the inner wall top of the sintered sheet impurity removal box, a first moving plate arranged at the execution end of the second linear module, a telescopic cylinder arranged on the top of the first moving plate and penetrating through the first moving plate at the execution end, a first lifting frame arranged at the execution end of the telescopic cylinder, and a plurality of electric vacuum suction pens linearly arranged on the bottom of the first lifting frame. In the preferred embodiment, the sintered sheet transfer device is used for automatically feeding and discharging the sintered sheet.

[0011] According to one embodiment of the present application, the crushing detection device comprises a third linear module horizontally arranged on the inner wall of the sintered sheet impurity removal box, and a camera arranged at the execution end of the third linear module. In the preferred embodiment, the crushing detection device is used for detecting the crushing of the sintered sheet.

[0012] According to one embodiment of the present application, the mechanical stripping device comprises a positioning box arranged on the inner wall of the sintered sheet impurity removal box, a plurality of first clamping pipes linearly arranged on the bottom of the positioning box, a plurality of first toothed discs rotationally connected to the inner wall of the positioning box, a plurality of second toothed discs rotationally connected to the inner wall of the positioning box and located between two adjacent first toothed discs, a power motor arranged on the outer wall of the positioning box and used for driving one of the first toothed discs to rotate, and a brush head located in the first clamping pipe; the brush head top is connected to the first toothed disc bottom through a connecting rod. In the preferred embodiment, the mechanical stripping device is used for conveniently sweeping the impurities on the surface of the sintered sheet.

[0013] According to one embodiment of the present application, the flushing device comprises a positioning plate arranged on the inner wall of the sintered sheet impurity removal box, a plurality of second clamping pipes arranged on the bottom of the positioning plate, an input pipe and an output pipe symmetrically arranged on the top of the positioning plate, a first pipe extending into the second clamping pipe at one end and extending to the second clamping pipe at the other end, and a second pipe extending into the second clamping pipe at one end and extending to the second clamping pipe at the other end; the drying device has the same structure as the flushing device. In the preferred embodiment, the flushing device facilitates the removal of residues on the surface of the sintered sheet.

[0014] According to one embodiment of the present application, the ultrasonic cleaning device comprises a cleaning box arranged on the inner wall of the sintered sheet impurity removal box, a plurality of through holes arranged in a linear array on the bottom of the cleaning box, an ultrasonic generator arranged on the outer wall of the cleaning box, and a liquid inlet pipe and a liquid outlet pipe symmetrically arranged at the two ends of the cleaning box. In the preferred embodiment, the ultrasonic cleaning device facilitates the removal of metal oxides on the surface of the sintered sheet.

[0015] According to one embodiment of the present application, the magnetic cover comprises a pipe body, a magnetic ring arranged on the outer wall of the pipe body, and an elastic sheet arranged on the inner wall of the pipe body. In the preferred embodiment, the magnetic cover realizes the carrying and transportation of the sintered sheet and the fixation during the overturning.

[0016] In summary, the present application has the following advantages:

[0017] The printing oil in the present application can be seen under 980nm laser irradiation through an industrial camera, and the surface of toner at the intersection of the strokes is obviously green, that is, the phenomenon that the printing oil covers the surface of the toner, and the use of the printing oil can better overcome the background light interference of the paper, which is of great significance for the judgment of the ink timing in the file inspection.

[0018] The preparation process and device of the printing oil in the present application can reduce impurities in NaYF4:Yb,Er micron fluorescent powder, and the green body sheet after sintering directly enters the sintered sheet impurity removal box, which is transported by a mechanical hand and a vacuum suction pen throughout the process, thereby avoiding artificial contact and secondary pollution.

[0019] The impurity removal process is completed in one time in the order of "mechanical peeling, 5% citric acid ultrasonic, deionized water / ethanol flushing, and drying", and the green body sheet can be automatically turned over under the monitoring of the broken detection device, and both sides are processed without omission.

[0020] The broken green body sheet is identified in real time and actively poured to prevent particle blockage of the pipeline or cross contamination, and ensure that the final fluorescent powder purity is greater than or equal to 99.5%.

[0021] The control system is open to OPC-UA interface, and can be connected to MES or laboratory LIMS, realizes batch traceability and cloud optimization of process parameters, and reserves space for future capacity expansion or function expansion. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 Process flow chart for the preparation of the present application;

[0023] Figure 2 Effect picture for printing oil inspection of the present application;

[0024] Figure 3 Axonometric view of the overall structure of the device of the present application;

[0025] Figure 4 Axonometric view of the internal structure of the sintered piece impurity removal box of the present application;

[0026] Figure 5 Exploded view of the overall structure of the device of the present application;

[0027] Figure 6 Exploded view of the sintered piece transfer device structure of the present application;

[0028] Figure 7 Exploded view of the turnover transfer device structure of the present application;

[0029] Figure 8 Exploded view of the crushing detection device and mechanical peeling device structure of the present application;

[0030] Figure 9 Axonometric view of the flushing device, drying device and acoustic cleaning device structure of the present application;

[0031] Figure 10 Sectional view of the overall structure of the device of the present application;

[0032] Figure 11 Magnified view of the structure at A of the present application;

[0033] Figure 12 Magnified view of the structure at B of the present application.

[0034] Figure Descriptions: 10. Sintered sheet impurity removal box; 11. Sintered sheet placement port; 20. Turning and transferring device; 21. Horizontal plate; 22. Rotating frame; 23. Positioning ring; 24. Magnetic cover; 241. Tube body; 242. Magnetic ring; 243. Elastic sheet; 25. Driving component; 251. First gear; 252. Second gear; 253. Support frame; 254. Stepper motor; 26. Magnetic cover opening component; 261. First linear module; 262. L-shaped moving plate; 263. First drive cylinder; 264. First lifting plate; 265. Positioning frame; 266. Electromagnetic block; 27. Cover transfer component; 30. Crushing detection device; 31. Third linear module; 32. 40. Camera; 41. Mechanical peeling device; 42. Positioning box; 43. First toothed disc; 44. Second toothed disc; 45. Power motor; 46. Brush head; 57. First retaining pipe; 58. Flushing device; 59. Positioning plate; 50. Second retaining pipe; 51. Input pipe; 52. Output pipe; 53. First pipeline; 54. Second pipeline; 60. Drying device; 71. Acoustic cleaning device; 72. Cleaning box; 73. Through hole; 74. Ultrasonic generator; 75. Liquid inlet pipe; 86. Liquid outlet pipe; 87. Sintered sheet transfer device; 88. Second linear module; 89. First moving plate; 80. Telescopic cylinder; 81. First lifting frame; 82. Electric vacuum suction pen. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0036] The embodiments of the present invention will now be described.

[0037] Please refer to the appendix for details. Figure 1 , 2 As shown, in a preferred embodiment of the present invention, a process for preparing anti-counterfeiting printing ink includes the following steps:

[0038] Step 1: Weigh the raw materials for the preparation of Er 3+ Ion doping concentration of 2 percent, Yb 3+ NaYF4 phosphor with 20% ion doping concentration was prepared by weighing NaF, YF3, YbF3 and ErF3 according to the stoichiometric ratio of the chemical formula. All raw materials were anhydrous fluoride powders.

[0039] Step 2: Grinding raw materials. NaF, YF3, YbF3 and ErF3 powders are ground separately using a planetary ball mill and then passed through a 400-mesh sieve.

[0040] Step three, tabletting process, after grinding NaF, YF3, YbF3 and ErF3 powder mixture, after mixing the mixed powder is placed in a stainless steel mold, compression to get the blank embryo piece one;

[0041] Step four, furnace firing, three to five millimeters of dry quartz sand is laid at the bottom of the small crucible, after putting the blank embryo piece one is buried with quartz sand, one centimeter of activated carbon particles is laid at the bottom of the large crucible, the small crucible is placed in the large crucible, and the large crucible is placed in the muffle furnace constant temperature zone;

[0042] Step five, embryo piece impurity removal, after firing the blank embryo piece one is placed in the sintered piece placing port 11 of the sintered piece impurity removal box 10, the blank embryo piece one is moved to the turning device 20 by the sintered piece transfer device 80, the blank embryo piece one is moved to the mechanical stripping device 40, the ultrasonic cleaning device 70, the washing device 50 and the drying device 60 in turn by the turning device 20 for impurity removal, and the blank embryo piece two is obtained after impurity removal and moved to the sintered piece placing port 11 by the sintered piece transfer device 80;

[0043] Step six, embryo piece post-processing, the blank embryo piece two is ground by using a planetary ball mill, and after grinding, it is passed through a two hundred mesh screen to obtain NaYF4:Yb,Er micron fluorescent powder;

[0044] Step seven, ink preparation, NaYF4:Yb,Er micron fluorescent powder and ink are weighed according to the mass ratio of one to ten, the NaYF4:Yb,Er micron fluorescent powder is added to the ink and continuously stirred for twenty-four hours by using a magnetic stirrer to obtain anti-fake ink.

[0045] It should be noted that in this embodiment, the ink in step seven can be photosensitive ink, such as morning AYZ97509, Dali No.9040, Qixin B3722, or atomic ink, such as morning AYZ97508, Dali No.9873, Qixin B3721;

[0046] The anti-fake ink cover is printed on the laser printed text, under 980 nm laser irradiation, the surface of toner at the intersection of the strokes is obviously green luminescence, that is, the phenomenon that the ink covers the surface of toner, if a filter is added in front of the camera lens, better effect can be achieved. The use of this ink can better overcome the background light interference of paper, which is of great significance for judging the timing of ink in document inspection;

[0047] Further, in step five, the mechanical stripping device 40 can effectively remove the impurities on the surface of the wafer, such as quartz sand, the flushing device 50 uses deionized water and anhydrous ethanol to effectively remove the soluble crystals on the surface of the wafer, the ultrasonic cleaning device 70 uses 5% citric acid to remove the metal oxides on the surface of the wafer, and the drying device 60 can dry the wafer. Through the above steps, the wafer can be effectively cleaned to ensure the purity of the final NaYF4:Yb,Er micron fluorescent powder.

[0048] According to the above embodiments and the accompanying drawings Figure 3 、 4, 5, 6, 7, 10, 11, 12, a counterfeit printing ink preparation process will also be provided, including a sintered sheet degreasing box 10, a sintered sheet placement opening 11 provided at one end of the sintered sheet degreasing box 10, and a turnover device 20, a crushing detection device 30, a mechanical stripping device 40, a flushing device 50, a drying device 60, and an ultrasonic cleaning device 70 provided in the sintered sheet degreasing box 10 in sequence away from the sintered sheet placement opening 11, the turnover device 20 includes a horizontal plate 21, a plurality of rotating frames 22 linearly arranged through the horizontal plate 21, a plurality of positioning rings 23 linearly arranged on the rotating frame 22, two magnetic covers 24 symmetrically arranged on the top and bottom of the positioning ring 23, and a driving component 25 provided on one side of the horizontal plate 21 and used to drive a plurality of rotating frames 22 to rotate simultaneously, further comprising a magnetic cover opening component 26 provided on the side of the horizontal plate 21 away from the driving component 25 and extending to the upper part of the horizontal plate 21, and a cover transfer component 27 provided at the bottom of the sintered sheet degreasing box 10, the magnetic cover opening component 26 includes a first linear module 261 provided on the outer wall of the horizontal plate 21, an L-shaped moving plate 262 provided on the execution end of the first linear module 261, a first drive cylinder 263 provided on the top of the L-shaped moving plate 262 and penetrating through the L-shaped moving plate 262, a first lifting plate 264 provided on the execution end of the first drive cylinder 263, a plurality of positioning frames 265 linearly arranged on the bottom of the first lifting plate 264, and a plurality of electromagnetic blocks 266 provided on the bottom of the positioning frame 265; the cover transfer component 27 has the same structure as the magnetic cover opening component 26, the driving component 25 includes a first gear 251 provided on the end of the rotating frame 22, a second gear 252 provided on the bottom of the horizontal plate 21 and located between two adjacent first gears 251, a support frame 253 provided on the outer wall of the horizontal plate 21, and a stepping motor 254 provided on the outer wall of the support frame 253 and used to drive one of the first gears 251 to rotate, further comprising a sintered sheet transfer device 80 provided on the inner wall top of the sintered sheet degreasing box 10, the sintered sheet transfer device 80 includes a second linear module 81 provided on the inner wall top of the sintered sheet degreasing box 10, a first moving plate 82 provided on the execution end of the second linear module 81, a telescopic cylinder 83 provided on the top of the first moving plate 82 and penetrating through the first moving plate 82, a first lifting frame 84 provided on the execution end of the telescopic cylinder 83, and a plurality of electric vacuum suction pens 85 linearly arranged on the bottom of the first lifting frame 84, the crushing detection device 30 includes a third linear module 31 horizontally provided on the inner wall of the sintered sheet degreasing box 10, and a camera 32 provided on the execution end of the third linear module 31, the magnetic cover 24 includes a tube body 241, a magnetic ring 242 provided on the outer wall of the tube body 241, and a elastic sheet 243 provided on the inner wall of the tube body 241.

[0049] It should be noted that in the present embodiment, when the sintered green sheet is subjected to impurity removal processing, the green sheet to be cleaned is first placed in the groove at the sintered sheet placement opening 11, and the sintered sheet transfer device 80 moves the plurality of green sheets to the turnover transfer device 20;

[0050] The turnover transfer device 20 receives the green sheet, and when receiving, the magnetic cover opening member 26 magnetically attracts and removes the magnetic cover 24 on the upper part of the rotating frame 22, the sintered sheet transfer device 80 moves the green sheet into the positioning ring 23 of the rotating frame 22, and is received by the magnetic cover 24 at the lower part of the rotating frame 22, and after the movement is completed, the magnetic cover opening member 26 drives the magnetic cover 24 to reset;

[0051] When removing impurities, the cover transfer member 27 magnetically attracts the magnetic cover 24 at the lower part of the rotating frame 22, and sequentially moves the magnetic cover 24 carrying the green sheet into the mechanical stripping device 40, the ultrasonic cleaning device 70, the rinsing device 50, and the drying device 60 for impurity removal;

[0052] After the impurities are removed, the magnetic cover opening member 26 magnetically attracts and removes the magnetic cover 24 on the upper part of the rotating frame 22, and the sintered sheet transfer device 80 moves the green sheet after the impurities are removed into the groove at the sintered sheet placement opening 11 to complete the impurity removal process;

[0053] Further, the green sheet moves into the impurity removal process of the mechanical stripping device 40, the rinsing device 50, the ultrasonic cleaning device 70, and the drying device 60, and for example, when the green sheet enters the mechanical stripping device 40 for impurity removal, the cover transfer member 27 magnetically attracts the magnetic cover 24 at the bottom of the rotating frame 22, sequentially moves the magnetic cover 24 carrying the green sheet into the mechanical stripping device 40 for mechanical impurity removal, and after the impurity removal of one side of the green sheet is completed, the cover transfer member 27 moves the magnetic cover 24 carrying the green sheet to the crushing detection device 30, the crushing detection device 30 detects the green sheet, if the green sheet is not broken, the cover transfer member 27 moves the magnetic cover 24 carrying the green sheet to the rotating frame 22, after the magnetic cover 24 carrying the green sheet is magnetically attracted to the positioning ring 23, the driving member 25 drives the rotating frame 22 to rotate one hundred and eighty degrees to turn over the green sheet, after the turning is completed, the cover transfer member 27 magnetically attracts the magnetic cover 24 at the bottom of the rotating frame 22, sequentially moves the magnetic cover 24 carrying the green sheet into the mechanical stripping device 40 to complete the impurity removal of the other side of the green sheet;

[0054] When the broken wafer detection device 30 detects the wafer, if the wafer is broken, the cap transfer component 27 moves the magnetic cap 24 carrying the wafer to the rotating frame 22, and the magnetic cap 24 is magnetically positioned on the positioning ring 23. During this process, the magnetic cap opening component 26 magnetically removes the magnetic cap 24 corresponding to the broken wafer position on the upper part of the rotating frame 22. The driving component 25 drives the rotating frame 22 to rotate by 180 degrees for the first time, so that the broken wafer is poured out. After pouring out, the driving component 25 drives the rotating frame 22 to reset, and the magnetic cap opening component 26 drives the magnetic cap 24 to reset. After resetting, the driving component 25 drives the rotating frame 22 to rotate by 180 degrees for the second time, so as to complete the wafer flipping. After flipping, the cap transfer component 27 magnetically rotates the magnetic cap 24 at the bottom of the rotating frame 22, so as to sequentially move the magnetic cap 24 carrying the wafer into the mechanical stripping device 40, so as to complete the impurity removal of the other side of the wafer.

[0055] The timely removal of the broken wafer can effectively prevent the broken wafer from affecting the normal operation of the device, preventing pipeline blockage, and preventing the broken wafer from polluting other normal wafers.

[0056] Further, when the sintered wafer transfer device 80 is working, the second linear module 81 drives the first moving plate 82 and the telescopic cylinder 83 to move, the telescopic cylinder 83 drives the first lifting frame 84 to lift and the electric vacuum suction pen 85 to lift, and the electric vacuum suction pen 85 is opened to adsorb and fix the wafer.

[0057] Further, the working principle of the cap transfer component 27 and the magnetic cap opening component 26 is consistent, taking the working of the magnetic cap opening component 26 as an example. The first linear module 261 drives the L-shaped moving plate 262 and the first driving cylinder 263 to move, the first driving cylinder 263 drives the first lifting plate 264 to lift, and the electromagnetic block 266 is magnetically attracted to the magnetic cap 24 after being powered on, and the magnetic force disappears after being powered off.

[0058] Further, when the driving component 25 is working, the stepping motor 254 drives one of the first gears 251 to rotate, and the first gear 251 drives the second gear 252 and the other first gears 251 to rotate through the transmission belt, and the first gear 251 drives the rotating frame 22 to rotate.

[0059] Further, when the magnetic cap 24 is working, the tube body 241 can carry the wafer, and the magnetic ring 242 can magnetically position the positioning ring 23.

[0060] Further, when the broken wafer detection device 30 is working, the third linear module 31 drives the camera 32 to move, the camera 32 takes pictures of the wafer, the controller receives the wafer picture information taken by the camera 32, and triggers the magnetic cap opening component 26 to work after analysis.

[0061] With reference to the drawings Figure 8 、 9 In a preferred embodiment of the present application, the mechanical stripping device 40 comprises a positioning box 41 arranged on the inner wall of the sintered sheet impurity removal box 10, a plurality of first clamping pipes 46 arranged in linear array at the bottom of the positioning box 41, a plurality of first toothed discs 42 rotatably connected to the inner wall of the positioning box 41, a plurality of second toothed discs 43 rotatably connected to the inner wall of the positioning box 41 and located between adjacent two first toothed discs 42, a power motor 44 arranged on the outer wall of the positioning box 41 and used to drive one of the first toothed discs 42 to rotate, and a brush head 45 located in the first clamping pipe 46; the top of the brush head 45 is connected to the bottom of the first toothed disc 42 through a connecting rod, the flushing device 50 comprises a positioning plate 51 arranged on the inner wall of the sintered sheet impurity removal box 10, a plurality of second clamping pipes 52 arranged at the bottom of the positioning plate 51, an input pipe 53 and an output pipe 54 symmetrically arranged at the top of the positioning plate 51, a first pipeline 55 having one end communicated with the input pipe 53 and the other end extended into the second clamping pipe 52, and a second pipeline 56 having one end communicated with the output pipe 54 and the other end extended into the second clamping pipe 52; the drying device 60 has the same structure as the flushing device 50, and the ultrasonic cleaning device 70 comprises a cleaning box 71 arranged on the inner wall of the sintered sheet impurity removal box 10, a plurality of through holes 72 arranged in linear array at the bottom of the cleaning box 71, an ultrasonic generator 73 arranged on the outer wall of the cleaning box 71, and a liquid inlet pipe 74 and a liquid outlet pipe 75 symmetrically arranged at the two ends of the cleaning box 71.

[0062] It should be noted that, in the present embodiment, when the mechanical stripping device 40 is working, the magnetic cover 24 carrying the elementary blank sheet is clamped into the mechanical stripping device 40, the power motor 44 drives one of the first toothed discs 42 to rotate, the first toothed disc 42 drives the second toothed discs 43 and the other first toothed discs 42 to rotate through the transmission belt, and the first toothed disc 42 drives the brush head 45 to rotate, so that the brush head 45 brushes the surface of the elementary blank sheet;

[0063] Further, when the flushing device 50 is working, the input pipe 53 is connected to the deionized water and anhydrous ethanol supply system through the pipeline and the electromagnetic valve, the output pipe 54 can be connected to the negative pressure system, after the magnetic cover 24 carrying the elementary blank sheet is clamped into the second clamping pipe 52, the flushing liquid enters the magnetic cover 24 through the input pipe 53 and the first pipeline 55, and the flushing liquid is discharged after flushing the elementary blank sheet through the second pipeline 56 and the output pipe 54;

[0064] The working principle of the drying device 60 is consistent with that of the flushing device 50, the input pipe 53 in the drying device 60 is connected to the drying gas source system, and the output pipe 54 is connected to the negative pressure system;

[0065] Further, when the ultrasonic cleaning device 70 is working, the liquid inlet pipe 74 is connected with the cleaning liquid supply system, and the liquid outlet pipe 75 is connected with the negative pressure system. The cleaning liquid can be 5% citric acid. After the magnetic cover 24 carrying the wafer is clamped into the through hole 72, the cleaning liquid supply system is opened, the cleaning liquid enters the cleaning box 71 through the liquid inlet pipe 74, the ultrasonic generator 73 generates ultrasonic waves, and the cleaning liquid is discharged through the liquid outlet pipe 75 after the cleaning is completed.

[0066] The working principle of the present application is as follows:

[0067] When the sintered wafer is cleaned, the wafer to be cleaned is placed in the groove at the sintered wafer placing opening 11, and the sintered wafer transfer device 80 moves the wafer to the wafer turning transfer device 20.

[0068] The wafer turning transfer device 20 receives the wafer. When receiving the wafer, the magnetic cover opening component 26 magnetically attracts the magnetic cover 24 on the upper part of the rotating frame 22 and removes it. The sintered wafer transfer device 80 moves the wafer into the positioning ring 23 of the rotating frame 22 and is received by the magnetic cover 24 on the lower part of the rotating frame 22. After the wafer is moved in, the magnetic cover opening component 26 drives the magnetic cover 24 to reset.

[0069] When the wafer is cleaned, the cover transfer component 27 magnetically attracts the magnetic cover 24 on the lower part of the rotating frame 22 and moves the magnetic cover 24 carrying the wafer into the mechanical stripping device 40, the ultrasonic cleaning device 70, the flushing device 50, and the drying device 60 in sequence for cleaning.

[0070] After the cleaning is completed, the magnetic cover opening component 26 magnetically attracts the magnetic cover 24 on the upper part of the rotating frame 22 and removes it. The sintered wafer transfer device 80 moves the cleaned wafer into the groove at the sintered wafer placing opening 11 to complete the cleaning process.

[0071] The wafer is moved into the mechanical stripping device 40, the flushing device 50, the ultrasonic cleaning device 70, and the drying device 60 for cleaning. Taking the mechanical stripping device 40 as an example, the cover transfer component 27 magnetically attracts the magnetic cover 24 on the bottom of the rotating frame 22 and moves the magnetic cover 24 carrying the wafer into the mechanical stripping device 40 in sequence for mechanical cleaning. After one side of the wafer is cleaned, the cover transfer component 27 moves the magnetic cover 24 carrying the wafer to the breakage detection device 30. The breakage detection device 30 detects the wafer. If the wafer is not broken, the cover transfer component 27 moves the magnetic cover 24 carrying the wafer to the rotating frame 22. After the magnetic cover 24 magnetically attracts the positioning ring 23, the driving component 25 drives the rotating frame 22 to rotate 180 degrees to turn the wafer over. After the wafer is turned over, the cover transfer component 27 magnetically attracts the magnetic cover 24 on the bottom of the rotating frame 22 and moves the magnetic cover 24 carrying the wafer into the mechanical stripping device 40 in sequence to complete the cleaning of the other side of the wafer.

[0072] When the broken detection device 30 detects the wafer sheet, if the wafer sheet is broken, the cover transfer component 27 moves the magnetic cover 24 carrying the wafer sheet to the rotating frame 22 until the magnetic cover 24 carrying the wafer sheet is magnetically attracted to the positioning ring 23. In this process, the magnetic cover opening component 26 magnetically removes the magnetic cover 24 corresponding to the position of the broken wafer sheet on the upper part of the rotating frame 22. The driving component 25 drives the rotating frame 22 to rotate by one hundred and eighty degrees for the first time, so that the broken wafer sheet is poured out. After pouring out, the driving component 25 drives the rotating frame 22 to reset, and the magnetic cover opening component 26 drives the magnetic cover 24 to reset. After resetting, the driving component 25 drives the rotating frame 22 to rotate by one hundred and eighty degrees for the second time, so as to complete the wafer sheet turnover. After the turnover is completed, the cover transfer component 27 magnetically attracts the magnetic cover 24 at the bottom of the rotating frame 22, so as to sequentially move the magnetic cover 24 carrying the wafer sheet into the mechanical stripping device 40, so as to complete the impurity removal of the other side of the wafer sheet;

[0073] The timely removal of the broken wafer sheet can effectively prevent the broken wafer sheet from affecting the normal work of the device, preventing pipeline blockage, and preventing the broken wafer sheet from polluting other normal wafer sheets;

[0074] When the sintered sheet transfer device 80 works, the second linear module 81 drives the first moving plate 82 and the telescopic cylinder 83 to move. The telescopic cylinder 83 drives the first lifting frame 84 to lift and the electric vacuum suction pen 85 to lift. After the electric vacuum suction pen 85 is turned on, the wafer sheet is adsorbed and fixed.

[0075] The cover transfer component 27 and the magnetic cover opening component 26 have the same working principle. Taking the magnetic cover opening component 26 as an example, the first linear module 261 drives the L-shaped moving plate 262 and the first driving cylinder 263 to move. The first driving cylinder 263 drives the first lifting plate 264 to lift. After the electromagnetic block 266 is powered on, the magnetic cover 24 can be magnetically attracted. After power off, the magnetic force of the electromagnetic block 266 disappears.

[0076] When the driving component 25 works, the stepping motor 254 drives one of the first gears 251 to rotate. The first gear 251 drives the second gear 252 and the other first gears 251 to rotate through the transmission belt. The first gear 251 drives the rotating frame 22 to rotate.

[0077] When the magnetic cover 24 works, the tube body 241 can carry the wafer sheet, and the magnetic ring 242 can magnetically attract the positioning ring 23.

[0078] When the broken detection device 30 works, the third linear module 31 drives the camera 32 to move. The camera 32 takes pictures of the wafer sheet. The controller receives the wafer sheet picture information taken by the camera 32, and triggers the magnetic cover opening component 26 to work after analysis.

[0079] When the mechanical stripping device 40 works, the magnetic cover 24 carrying the wafer sheet is clamped into the mechanical stripping device 40, the power motor 44 is driven to rotate one of the first toothed discs 42, the first toothed disc 42 drives the second toothed disc 43 and the other first toothed discs 42 to rotate through the transmission belt, and the first toothed disc 42 drives the brush head 45 to rotate, so as to brush the surface of the wafer sheet;

[0080] When the flushing device 50 works, the input pipe 53 is connected with the deionized water and anhydrous ethanol supply system through the pipeline and the electromagnetic valve, the output pipe 54 can be connected with the negative pressure system, the magnetic cover 24 carrying the wafer sheet is clamped into the second clamping pipe 52, the flushing liquid enters the magnetic cover 24 through the input pipe 53 and the first pipeline 55, and the wafer sheet is flushed, and then the flushing liquid is discharged through the second pipeline 56 and the output pipe 54;

[0081] The working principle of the drying device 60 is the same as that of the flushing device 50, the input pipe 53 in the drying device 60 is connected with the drying gas source system, and the output pipe 54 is connected with the negative pressure system;

[0082] Further, when the ultrasonic cleaning device 70 works, the liquid inlet pipe 74 is connected with the cleaning liquid supply system, the liquid outlet pipe 75 is connected with the negative pressure system, the cleaning liquid can be 5% citric acid, the magnetic cover 24 carrying the wafer sheet is clamped into the through hole 72, the cleaning liquid supply system is opened, the cleaning liquid enters the cleaning box 71 through the liquid inlet pipe 74, the ultrasonic generator 73 generates ultrasonic waves, and after the cleaning is completed, the cleaning liquid is discharged through the liquid outlet pipe 75.

[0083] Although the embodiments of the present application have been shown and described, the specific embodiments are merely illustrative of the present application, and are not intended to limit the application, and the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner, and those skilled in the art can make modifications, replacements and variations of the embodiments without creative contribution after reading the specification, as long as the principles and purposes of the present application are not deviated, and the application is protected by the patent law as long as it is within the scope of the claims of the present application.

Claims

1. A process for the preparation of a security printing ink, characterized in that, Comprising the following steps: Step one, take the raw materials, for the preparation of Er 3+ ion doping concentration of two percent, Yb 3+ ion doping concentration of twenty percent of NaYF4 fluorescent powder, according to the chemical formula of the amount of NaF, YF3, YbF3 and ErF3 for standby, all raw materials are anhydrous fluoride powder; Step two, raw material grinding, using a planetary ball mill to grind NaF, YF3, YbF3 and ErF3 powder respectively, after grinding, pass through a four hundred mesh screen; Step three, tabletting, mix the ground NaF, YF3, YbF3 and ErF3 powder, after mixing, place the mixed powder in a stainless steel mold, and press to obtain a green sheet one; Step four, furnace firing, lay three to five millimeters of dry quartz sand at the bottom of the small crucible, place the green sheet one, then bury it with quartz sand, lay one centimeter of activated carbon particles at the bottom of the large crucible, place the small crucible in the large crucible, and place the large crucible in the muffle furnace constant temperature zone; Step five, embryo sheet impurity removal, place the fired green sheet one in the sintered sheet placing port (11) of the sintered sheet impurity removal box (10), move the green sheet one to the turnover transport device (20) by the sintered sheet transport device (80), move the green sheet one to the mechanical stripping device (40), the ultrasonic cleaning device (70), the washing device (50) and the drying device (60) in sequence by the turnover transport device (20) for impurity removal, obtain the green sheet two after impurity removal, and move it to the sintered sheet placing port (11) by the sintered sheet transport device (80); Step six, embryo sheet post-processing, use a planetary ball mill to grind the green sheet two, pass through a two hundred mesh screen after grinding to obtain NaYF4:Yb,Er micron fluorescent powder; Step seven, ink preparation, take NaYF4:Yb,Er micron fluorescent powder and printing ink according to the mass ratio of one to ten, add the NaYF4:Yb,Er micron fluorescent powder to the printing ink and continuously stir for twenty-four hours using a magnetic stirrer to obtain anti-fake printing ink; It also includes a sintered sheet impurity removal box (10), a sintered sheet placement port (11) located at one end of the sintered sheet impurity removal box (10), and a flipping and transfer device (20), a breakage detection device (30), a mechanical stripping device (40), a rinsing device (50), a drying device (60), and an acoustic cleaning device (70) arranged sequentially in the sintered sheet impurity removal box (10) in a direction away from the sintered sheet placement port (11). The flipping and transfer device (20) includes a horizontal plate (21), a plurality of rotating frames (22) passing through the horizontal plate (21) and arranged in a linear array, a plurality of positioning rings (23) arranged in a linear array on the rotating frames (22), two magnetic caps (24) symmetrically arranged at the top and bottom of the positioning rings (23), and a driving component (25) located on one side of the horizontal plate (21) for simultaneously driving the plurality of rotating frames (22) to rotate; it also includes a flipping and transfer device (20), a breakage detection device (30), a mechanical stripping device (40), a rinsing device (50), a drying device (60), and an acoustic cleaning device (70) arranged on the horizontal plate (21). 1) A magnetic cap opening component (26) on the side away from the driving component (25) and whose execution end extends to the upper part of the horizontal plate (21), and a cap transfer component (27) provided at the bottom of the sintering sheet impurity removal box (10); the magnetic cap opening component (26) includes a first linear module (261) provided on the outer wall of the horizontal plate (21), an L-shaped moving plate (262) provided at the execution end of the first linear module (261), a first driving cylinder (263) provided at the top of the L-shaped moving plate (262) and whose execution end penetrates through the L-shaped moving plate (262), a first lifting plate (264) provided at the execution end of the first driving cylinder (263), a plurality of positioning frames (265) linearly arrayed at the bottom of the first lifting plate (264), and a plurality of electromagnetic blocks (266) provided at the bottom of the positioning frames (265); the cap transfer component (27) has the same structure as the magnetic cap opening component (26).

2. A process for the preparation of a security ink as claimed in claim 1, wherein, The driving component (25) includes a first gear (251) disposed at the end of the rotating frame (22), a second gear (252) disposed at the bottom of the horizontal plate (21) and located between two adjacent first gears (251), a support frame (253) disposed on the outer wall of the horizontal plate (21), and a stepper motor (254) disposed on the outer wall of the support frame (253) for driving one of the first gears (251) to rotate.

3. A process for the preparation of a security ink as claimed in claim 1, wherein, It also includes a sintered sheet transfer device (80) located on the top of the inner wall of the sintered sheet impurity removal box (10). The sintered sheet transfer device (80) includes a second linear module (81) located on the top of the inner wall of the sintered sheet impurity removal box (10), a first moving plate (82) located at the execution end of the second linear module (81), a telescopic cylinder (83) located on the top of the first moving plate (82) and whose execution end passes through the first moving plate (82), a first lifting frame (84) located at the execution end of the telescopic cylinder (83), and a plurality of electric vacuum suction pens (85) arranged in a linear array at the bottom of the first lifting frame (84).

4. A process for the preparation of a security ink as claimed in claim 1, wherein, The breaking detection device (30) comprises a third linear module (31) horizontally arranged on the inner wall of the sintered sheet impurity removal box (10), and a camera (32) arranged at the execution end of the third linear module (31).

5. A process for the preparation of a security ink as claimed in claim 1, wherein, The mechanical stripping device (40) comprises a positioning box (41) arranged on the inner wall of the sintered sheet impurity removal box (10), a plurality of first clamping pipes (46) linearly arranged at the bottom of the positioning box (41), a plurality of first toothed discs (42) rotationally connected to the inner wall of the positioning box (41), a plurality of second toothed discs (43) rotationally connected to the inner wall of the positioning box (41) and located between adjacent two first toothed discs (42), a power motor (44) arranged on the outer wall of the positioning box (41) and used for driving rotation of one of the first toothed discs (42), and a brush head (45) located in the first clamping pipe (46). The top of the brush head (45) is connected to the bottom of the first toothed disc (42) through a connecting rod.

6. A process for the preparation of a security ink as claimed in claim 1, wherein, The flushing device (50) comprises a positioning plate (51) arranged on the inner wall of the sintered sheet impurity removal box (10), a plurality of second clamping pipes (52) arranged at the bottom of the positioning plate (51), an input pipe (53) and an output pipe (54) symmetrically arranged at the top of the positioning plate (51), a first pipe (55) having one end communicated with the input pipe (53) and the other end extended into the second clamping pipe (52), and a second pipe (56) having one end communicated with the output pipe (54) and the other end extended into the second clamping pipe (52). The drying device (60) has the same structure as the flushing device (50).

7. A process for the preparation of a security ink as claimed in claim 1, wherein, The ultrasonic cleaning device (70) comprises a cleaning box (71) arranged on the inner wall of the sintered sheet impurity removal box (10), a plurality of through holes (72) linearly arranged at the bottom of the cleaning box (71), an ultrasonic generator (73) arranged on the outer wall of the cleaning box (71), and an inlet pipe (74) and an outlet pipe (75) symmetrically arranged at two ends of the cleaning box (71).

8. A process for the preparation of a forgery-proof stamp ink as claimed in claim 1, wherein, The magnetic cover (24) comprises a pipe body (241), a magnetic ring (242) arranged on the outer wall of the pipe body (241), and an elastic sheet (243) arranged on the inner wall of the pipe body (241).

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