CN115817004B

CN115817004B - Security printing device for printing securities and printing method thereof

Info

Publication number: CN115817004B
Application number: CN202310140243.4A
Authority: CN
Inventors: 吴伟; 范琦
Original assignee: Nanjing Jianwei Science And Technology Co ltd
Current assignee: Wu Wei
Priority date: 2023-02-21
Filing date: 2023-02-21
Publication date: 2023-05-05
Anticipated expiration: 2043-02-21
Also published as: CN115817004A

Abstract

The invention relates to the technical field of securities printing, in particular to a securities printing device and a printing method thereof, wherein the securities printing device comprises a machine shell, a feeding mechanism, a locking and replacing mechanism, a centering mechanism, a slitting mechanism and an unreeling mechanism, a control board is arranged at the middle part of the machine shell, a first rotating roller is arranged at one end of the machine shell, a second rotating roller is arranged at one side of the first rotating roller, a printing roller is arranged at the middle part of the machine shell, and a pressing plate is arranged at the bottom end of the printing roller. The device is convenient for a user to replace the special printing rod, so that the user can conveniently print different patterns, and can perform centering work, so that the phenomenon that the security paper is deviated in printing can be avoided, the normal operation of subsequent work is ensured, the printed securities can be cut and rolled through the device, the replacement is simple and convenient, the user time and the production cost can be greatly saved, and the working benefit is improved.

Description

Security printing device for printing securities and printing method thereof

Technical Field

The invention relates to the technical field of securities printing, in particular to a securities printing device and a printing method thereof.

Background

Securities, which are a collective term for various economic equity vouchers, also referred to as special kinds of products, are legal vouchers for proving a certain special equity enjoyed by ticket holders, and mainly include capital securities, monetary securities, commodity securities, and the like. The securities in the narrow sense mainly refer to securities products in the securities market, wherein the securities products comprise property market products such as stocks, bond market products such as bonds, derivative market products such as stock futures, options, interest futures and the like, and a common printing device is to print ink on the surface of paper so as to achieve the printing effect, but the printing modes of part of special securities are different, and grooves are required to be pressed on the securities paper for printing so as to achieve the unique printing effect, so that special printing equipment is required to be used for printing;

when the special printing equipment for the existing securities is used, and different patterns are required to be printed, the printing rotary roller is required to be replaced, the replacement is very complicated, and only one side of the special printing equipment can be centered, so that the follow-up printing work is influenced, meanwhile, the printed securities cannot be cut and collected, a great amount of working time is wasted, the production cost of a user is increased, and the benefit is reduced.

Disclosure of Invention

The invention aims to provide a security printing device and a printing method thereof for printing securities, which solve the problems that when the special printing equipment for the existing securities is used, the printing roller needs to be replaced when different patterns need to be printed, the replacement is very complicated, only one side of the printing roller is centered, thus influencing the subsequent work of printing, and meanwhile, the printed securities cannot be cut and collected, thus wasting a large amount of working time, increasing the production cost of users and reducing the benefit.

In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a security printing device and printing method for printing securities, includes casing, feed mechanism, locking change mechanism, centering mechanism, slitting mechanism and unreeling mechanism, the middle part of casing is provided with the control panel, the one end of casing is provided with first roller, one side of first roller is provided with the second roller, the middle part of casing is provided with the printing roller, the bottom of printing roller is provided with the clamp plate, and the both ends of clamp plate all are with casing fixed connection, the one end of clamp plate is connected with the auxiliary roller through the bearing, one side of printing roller is provided with the third roller, one side of third roller is provided with the fourth roller, the top of fourth roller is provided with the fifth roller, the change mouth has been seted up at the middle part of casing, one point of casing is provided with the slitting roller, both ends of casing all are provided with the material roller, the one end of material roller all fixedly connected with first gear, the two ends of the shell are connected with a second gear through bearings, the second gear is meshed with the first gear, one side of the shell is connected with four groups of auxiliary wheels through bearings, one side of the shell is provided with a first motor, one side of the shell is provided with a driving belt, two ends of the first rotating roller and the fifth rotating roller are connected with the shell through bearings, one ends of the second rotating roller, the printing roller, the third rotating roller, the fourth rotating roller and the slitting roller are positioned outside the shell, one ends of the second rotating roller, the third rotating roller, the fourth rotating roller and the slitting roller are connected with the shell through bearings, the surface of the driving belt is attached to one end of the second rotating roller, the printing roller, the fourth rotating roller and the slitting roller, one side of the replacing port is provided with a connecting push groove, the inside sliding connection who connects the push groove has the connection push pedal, change mouthful and printing roller's one end correspondence.

Preferably, the control end of the control board is electrically connected with an external power supply, and the control end of the first motor is electrically connected with the control board, so that a user can conveniently control the device to work.

Preferably, the feed mechanism includes pigment case, dye box, material pipe, measuring pump, dyes cotton and shower nozzle, the inner wall fixedly connected with pigment case on casing top, the middle part fixedly connected with dye box of casing, and the bottom of dye box is close to the surface of printing roller, one side of pigment case is connected with the material pipe, the surface evenly connected with shower nozzle of material pipe, and the bottom of shower nozzle all extends to the inside of dye box, the bottom of dye box is provided with dyes cotton, and dyes cotton and be close to the printing roller, the both ends of material pipe all are provided with the measuring pump, and the control end of measuring pump all with control panel electric connection, be convenient for smear fuel to purpose-made printing rod.

Preferably, the locking and replacing mechanism comprises a dryer, a rotary groove, a fixed rotary piece, a first rotary wheel, fixed teeth, a movable block, a fixed rod, a connecting hinge rod, a first threaded rotary rod, a first sliding groove, a first sliding block, a printing groove, a fixed groove, a special printing rod, a right-angle groove, a guide block and a second threaded rotary rod, wherein the dryer is arranged in the middle of the machine shell, the dryer is arranged between a third rotary roller and a fourth rotary roller, the rotary groove is formed in one end of the printing roller, the fixed rotary piece is arranged at one end of the printing roller, one end of the fixed rotary piece is fixedly connected with the machine shell, one side of the fixed rotary piece is in rotary connection with the rotary groove through a bearing, one side of the fixed rotary piece is connected with the first rotary wheel through the bearing, one end of the fixed tooth is arranged outside the first rotary wheel, the fixed tooth is arranged at one end of the fixed rotary piece, the movable block is arranged inside the fixed rotary rod, one end of the fixed rotary rod is symmetrically in sliding connection with the fixed rod through the rotating shaft, one end of the fixed hinge rod is connected with the connecting hinge rod through the rotating shaft, one end of the connecting hinge rod is in sliding connection with the movable block through the first sliding groove, the two ends of the fixed rotary rod are uniformly arranged at one side of the rotary groove respectively, and the two ends of the fixed rotary rod are in sliding grooves are respectively connected with the corresponding to the first rotary groove, and the inner side of the fixed rotary groove is uniformly passes through the first rotary groove respectively, and the fixed groove is in the fixed groove, the inside of right angle groove all sliding connection has the guide block, and the one end of guide block all is connected with purpose-built stamp pole fixed connection, the one end of fixed slot all has the second screw thread bull stick through threaded connection, and the one end of second screw thread bull stick is laminated with purpose-built stamp pole one end mutually, the control end and the control panel electric connection of drying-machine, the user of being convenient for changes purpose-built stamp pole, can print different patterns.

Preferably, the centering mechanism comprises a bottom plate, a movable groove, a thread bush, a reverse threaded rod, a second motor, a connecting groove, a connecting rod, a second sliding block and a centering plate, wherein the bottom plate is fixedly connected with the middle part of the machine shell, the movable groove is formed in the middle part of the bottom plate, two groups of thread bushes are connected in a sliding mode in the movable groove, the reverse threaded rod is arranged in the movable groove, the reverse threaded rod is connected with the thread bush through threads, the surface threads of the reverse threaded rod are opposite in direction, one end of the bottom plate is provided with the second motor, the output end of the second motor is fixedly connected with one end of the reverse threaded rod, one end of the reverse threaded rod is connected with the inner wall of the movable groove through a bearing, the two ends of the bottom plate are all provided with the second sliding, one end of the connecting groove is all connected with the movable groove, two groups of connecting rods are all fixedly connected in the inside of the connecting groove, two groups of second sliding connection with the two groups of second sliding blocks are all fixedly connected with one another, one end of the second sliding block is opposite to one end of the reverse threaded rod, one end of the second sliding block is fixedly connected with one end of the second sliding plate, one end of the second sliding block is located between two groups of the second sliding roller and the second roller, one end is located between the second roller and the second roller.

Preferably, the slitting mechanism comprises a slitting wheel, a slitting plate, an adjusting groove, an adjusting block, an adjusting rod, scale marks, a pressing and slitting roller and a stepping motor, wherein the slitting plate is arranged at the bottom end of the slitting roller, the two ends of the slitting plate are fixedly connected with a shell, the slitting wheel is uniformly arranged on the surface of the slitting roller, the scale marks are arranged on the surface of the slitting roller, three groups of adjusting grooves are uniformly arranged on the surface of the slitting roller, the adjusting block is slidably connected inside the adjusting groove, one ends of the adjusting block are fixedly connected with the slitting wheel respectively, one ends of the adjusting block are connected with the adjusting rod through threads, one ends of the adjusting rod are abutted against the inner wall of the adjusting groove, the pressing and slitting roller is arranged at one end of the slitting plate, one end of the pressing and slitting roller is connected with the shell through a bearing, the output end of the stepping motor is fixedly connected with one end of the pressing and slitting roller, and the control end of the stepping motor is electrically connected with the control board, and the slitting operation is convenient.

Preferably, the unreeling mechanism comprises a reeling drum, a reeling groove, a retaining plate, a fixing piece, a torsion spring, a propping piece, a third threaded rotating rod, an electric push rod, a fixed arc plate, a second rotating wheel, a third sliding groove, a third sliding block, a guide groove and guide plates, wherein the reeling drum is uniformly arranged on the surface of the material roller, the reeling groove is uniformly formed on the surface of the material roller, the retaining plate is arranged inside the reeling groove, one end of the retaining plate is provided with the fixing piece, two ends of the fixing piece are fixedly connected with the inner wall of the reeling groove, one end of the retaining plate is provided with the torsion spring, two ends of the torsion spring are respectively fixedly connected with the retaining plate and the fixing piece, the material roller is in sliding connection with the propping piece, the middle part of the propping piece is uniformly inclined, two groups of third sliding grooves are formed in two ends of the machine shell, the third sliding groove is in sliding connection with the third sliding block, the guide groove is symmetrically formed in the inner wall of the third sliding groove, one end of the guide groove is in sliding connection with the guide plate, one end of the retaining plate is respectively in sliding connection with the guide groove, one end of the guide groove is respectively, the guide plate is in sliding connection with the third sliding groove, the guide groove is respectively, the guide groove is in sliding connection with the third sliding groove, the guide groove is respectively, the other end is in sliding connection with the third sliding groove is in sliding groove, and the same with the same as the outer groove, and the outer groove is respectively through the same as the threaded roller, and the same as the material roller, and the first end is in threaded roller, and the shape, and the material roller is uniformly passes through the first end and has a threaded end and has a flat shape and has, the release and collection of the security paper are facilitated.

The printing method of the device comprises the following steps:

step one: changing, namely rotating the first threaded rotating rod by a user, enabling the fixing rod to be inserted into the fixing teeth through the first threaded rotating rod and the connecting hinge rod, locking the printing roller, rotating the second threaded rotating rod by the user at the moment, taking down the special printing rod, changing the special printing rod into a needed special printing rod, fixing the special printing rod, unlocking the printing roller through rotating the first threaded rotating rod, and finishing the changing at the moment;

step two: fixing the security paper, wherein a user rotates the third threaded rotating rod to enable the abutting piece to be not abutted against the abutting plate, the abutting plate is received inside the material rollers at the moment, the security paper roll and the winding drum are respectively sleeved on the surfaces of the two groups of material rollers to enable the security paper roll and the winding drum to be in proper positions, then the third threaded rotating rod is rotated to fix the security paper roll and the winding drum, then the user places the material rollers at two ends of the machine shell, and the material rollers are positioned and guided through the third sliding block and the guide plate to enable the material rollers to be meshed with the first gear, and then the fixed arc plate is enabled to ascend until the fixed arc plate is attached to the material rollers;

step three: centering, namely enabling the security paper to pass through the device, enabling one end of the security paper to be fixed with the winding drum, controlling the second motor to work by a user, and centering the security paper through the threaded sleeve, the reverse threaded rod, the connecting rod and the centering plate;

Step four: after the user rotates the adjusting rod, the cutting wheel can be moved, the cutting interval is controlled through the scale marks, and the cutting interval is fixed through rotating the adjusting rod after the adjustment is finished;

step five: printing, the user passes through control panel control this device work, the output of first motor passes through the drive belt, the second gear, first gear and auxiliary wheel drive material roller, the second changes the roller, the printing roller, fourth changes roller and cuts the roller rotation, the security paper moves this moment, the metering pump spouts the pigment of pigment incasement portion to the surface of dying cotton through the shower nozzle, print the purpose-made printing pole of printing roller inside through dying cotton, print the work when carrying out the impression to the security paper through purpose-made printing pole 38, thereby form purpose-made security, the dryer can carry out quick stoving work to pigment, through step motor and step motor can control the interval of pressing the cutting roller cutting, rotatory cutting roller and cutting wheel carry out cutting work, a set of material roller carries out the paper release this moment, another set of material roller carries out the paper receiving work.

Compared with the prior art, the invention has the beneficial effects that:

the user rotates the first screw thread rotating rod, the fixing rod can be inserted into the fixing teeth through the first screw thread rotating rod and the connecting hinge rod, so that the printing roller is locked, at the moment, the user rotates the second screw thread rotating rod, then takes down the special printing rod, changes the special printing rod into a needed special printing rod, then fixes the special printing rod, unlocks the printing roller through rotating the first screw thread rotating rod, at the moment, the replacement is completed, so that the user changes the special printing rod very simply and conveniently, the user rotates the third screw thread rotating rod firstly, so that the abutting piece does not abut against the abutting plate, at the moment, the abutting plate is collected inside the material roller, the surfaces of the paper roll and the rolling barrel are respectively sleeved on the two groups of material rollers, so that the surfaces of the paper roll and the rolling barrel are located at proper positions, then rotates the third screw thread rotating rod, so that the abutting piece abuts against the abutting plate, the paper roll and the rolling barrel are fixed through the abutting plate, and then the material roller is placed at two ends of the machine shell by the user, the third sliding block and the guide plate are used for positioning and guiding, the material roller and the first gear are meshed, then the fixed arc plate is lifted until being attached to the material roller, at the moment, the installation is completed, the user passes the security paper through the device, one end of the security paper is fixed with the winding drum, the user controls the second motor to work, the security paper can be centered through the threaded sleeve, the reverse threaded rod, the connecting rod and the centering plate, so that the situation of deviation is avoided, the follow-up cutting and collecting work is facilitated, the user can conveniently disassemble and assemble the winding drum, then the user readjust the cutting space is adjusted, the user can move the cutting wheel after rotating the adjusting rod, the cutting space is controlled through the scale mark, the adjustment rod is rotated to fix the security paper after the adjustment is completed, the cutting space is conveniently adjusted, the user is ready at the moment, the user controls the device to print through the control board, the output of first motor drives material roller, second transfer roller, printing roller, fourth transfer roller and slitting roller through drive belt, the second transfer roller, printing roller, fourth transfer roller and slitting roller rotate, the security paper moves this moment, the metering pump begins work when the printing roller rotates, the metering pump spouts the pigment of pigment incasement portion to the surface of dying cotton through the shower nozzle, print the purpose-built print pole of printing roller inside through dying cotton, thereby the printing work of purpose-built print pole is convenient for, print the while to the security paper through purpose-built print pole 38, thereby form purpose-built security, the dryer can carry out quick stoving work to the pigment, the output of step motor drives the operation of pressing and cutting roller simultaneously, through step motor's rotational speed can control pressing and cutting roller rotation, cut the operation through cutting roller, a set of material roller is put paper, another set of material roller is carried out the paper collecting operation, this device facilitates the user to change purpose-built print pole, thereby the purpose-built print different patterns of user printing, can carry out the printing work simultaneously, thereby can carry out the purpose-built security paper in offset in the printing device and guarantee that the offset appears in the printing is easy, the subsequent work can be carried out with normal, and the rolling time is easy, the production can be realized, the cost is greatly improved, the user can be finished, the user is convenient, and has good production and can be finished.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic perspective view of the present invention;

FIG. 3 is a schematic perspective view of a casing in the present invention;

FIG. 4 is a schematic perspective view of a feeding mechanism according to the present invention;

FIG. 5 is a schematic perspective view of a transfer slot and a stationary tooth in accordance with the present invention;

FIG. 6 is a schematic perspective view of a first chute and a stationary rotor according to the present invention;

FIG. 7 is a schematic perspective view of a printing roller, a fixed slot and a right angle slot according to the present invention;

FIG. 8 is a schematic perspective view of a cross-section of a base plate and a connecting trough of the present invention;

FIG. 9 is a schematic perspective view of a slitting roller and an adjusting block of the present invention;

FIG. 10 is a schematic perspective view of a material roll and a fixed arc plate in the present invention;

FIG. 11 is a schematic perspective view of a material roll and a receiving tank in the present invention;

fig. 12 is a schematic cross-sectional perspective view of the third chute and the connecting push slot of the present invention.

In the figure: 1. a housing; 2. a control board; 3. a first rotating roller; 4. a second roller; 5. a printing roller; 6. a pressing plate; 7. an auxiliary roller; 8. a third roller; 9. a fourth roller; 10. a fifth roller; 11. a replacement port; 12. a slitting roller; 13. a material roller; 14. a first gear; 15. a second gear; 16. an auxiliary wheel; 17. a first motor; 18. a transmission belt; 19. a pigment box; 20. a dye box; 21. a material pipe; 22. a metering pump; 23. dyeing cotton; 24. a spray head; 25. a dryer; 26. a rotary groove; 27. fixing the rotating piece; 28. a first wheel; 29. a fixed tooth; 30. a movable block; 31. a fixed rod; 32. connecting a hinge rod; 33. a first threaded rotating rod; 34. a first chute; 35. a first slider; 36. a groove is printed; 37. a fixing groove; 38. tailoring the printing rod; 39. a right angle slot; 40. a guide block; 41. a second threaded rotating rod; 42. a bottom plate; 43. a moving groove; 44. a thread sleeve; 45. a reverse threaded rod; 46. a second motor; 47. a connecting groove; 48. a connecting rod; 49. a second slide; 50. a second slider; 51. centering plates; 52. cutting a plate; 53. an adjustment tank; 54. an adjusting block; 55. an adjusting rod; 56. scale marks; 57. a pressing and cutting roller; 58. a stepping motor; 59. winding up a winding drum; 60. a groove is collected; 61. a retaining plate; 62. a fixing member; 63. a torsion spring; 64. a supporting piece; 65. a third threaded rotating rod; 66. an electric push rod; 67. fixing the arc plate; 68. a second wheel; 69. a third chute; 70. a third slider; 71. a guide groove; 72. a guide plate; 73. the connecting pushing groove; 74. the connecting push plate; 75. and (5) cutting the wheel.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1-12, an embodiment of the present invention is provided:

a security printing device for printing securities and a printing method thereof, comprising a shell 1, a feeding mechanism, a locking and replacing mechanism, a centering mechanism, a slitting mechanism and an unreeling mechanism, wherein a control board 2 is arranged in the middle of the shell 1, a first rotary roller 3 is arranged at one end of the shell 1, a second rotary roller 4 is arranged at one side of the first rotary roller 3, a printing roller 5 is arranged in the middle of the shell 1, a pressing plate 6 is arranged at the bottom end of the printing roller 5, both ends of the pressing plate 6 are fixedly connected with the shell 1, one end of the pressing plate 6 is connected with an auxiliary roller 7 through a bearing, a third rotary roller 8 is arranged at one side of the printing roller 5, a fourth rotary roller 9 is arranged at one side of the third rotary roller 8, a fifth rotary roller 10 is arranged at the top end of the fourth rotary roller 9, a replacing opening 11 is arranged in the middle of the shell 1, a slitting roller 12 is arranged at one point of the shell 1, a material roller 13 is arranged at both ends of the shell 1, one end of the material roller 13 is fixedly connected with a first gear 14, two ends of the machine shell 1 are connected with a second gear 15 through bearings, the second gear 15 is respectively meshed with the first gear 14, one side of the machine shell 1 is connected with four groups of auxiliary wheels 16 through bearings, one side of the machine shell 1 is provided with a first motor 17, one side of the machine shell 1 is provided with a transmission belt 18, two ends of the first rotary roller 3 and the fifth rotary roller 10 are connected with the machine shell 1 through bearings, one ends of the second rotary roller 4, the printing roller 5, the third rotary roller 8, the fourth rotary roller 9 and the slitting roller 12 are positioned outside the machine shell 1, one ends of the second rotary roller 4, the third rotary roller 8, the fourth rotary roller 9 and the slitting roller 12 are connected with the machine shell 1 through bearings, and the surface of the transmission belt 18 is connected with the output end of the first motor 17, the rotating shaft of the second gear 15, the surface of the auxiliary wheels 16 and the second rotary roller 4, the printing roller 5, one ends of the fourth rotating roller 9 and the slitting roller 12 are attached, one side of the replacement opening 11 is provided with a connecting pushing groove 73, the inside of the connecting pushing groove 73 is connected with a connecting pushing plate 74 in a sliding manner, and the replacement opening 11 corresponds to one end of the printing roller 5;

Referring to fig. 2, 4, 5, 6 and 7, in the present embodiment, the locking and replacing mechanism includes a dryer 25, a rotary slot 26, a fixed rotary member 27, a first rotary wheel 28, a fixed tooth 29, a movable block 30, a fixed rod 31, a connecting hinge rod 32, a first threaded rotary rod 33, a first sliding slot 34, a first sliding block 35, a printing slot 36, a fixed slot 37, a special printing rod 38, a right angle slot 39, a guide block 40 and a second threaded rotary rod 41, the dryer 25 is disposed in the middle of the casing 1 and between the third rotary roller 8 and the fourth rotary roller 9, a rotary slot 26 is disposed at one end of the printing roller 5, a fixed rotary member 27 is disposed at one end of the printing roller 5, one side of the fixed rotary member 27 is rotatably connected with the rotary slot 26, the first rotary wheel 28 is connected to one side of the fixed rotary member 27 through a bearing, a fixed tooth 29 is disposed at one end of the casing 1, the fixed teeth 29 are positioned outside the first rotating wheel 28, the movable block 30 is arranged in the fixed rotating piece 27, one end of the fixed rotating piece 27 is symmetrically and slidingly connected with the fixed rod 31, one end of the fixed rod 31 is connected with the connecting hinge rod 32 through a rotating shaft, one end of the connecting hinge rod 32 is connected with the movable block 30 through the rotating shaft, one end of the movable block 30 is connected with the first threaded rotating rod 33 through a bearing, one end of the first threaded rotating rod 33 penetrates through the fixed rotating piece 27 to extend to the outside of the machine shell 1, two groups of first sliding grooves 34 are formed in one side of the fixed rotating piece 27, the first sliding grooves 34 are slidingly connected with the first sliding blocks 35, one ends of the first sliding blocks 35 are fixedly connected with the fixed rod 31 respectively, the surface of the printing roller 5 is uniformly provided with printing grooves 36, the inner wall of the printing roller 5 is uniformly and fixedly connected with the fixed grooves 37, and the fixed grooves 37 correspond to the printing grooves 36 respectively, the inside of the fixed slot 37 is connected with a special printing rod 38 in a sliding way, one end of the special printing rod 38 penetrates through the printing slot 36 respectively, a right-angle slot 39 is uniformly formed in the inside of the fixed slot 37, a guide block 40 is connected in a sliding way in the inside of the right-angle slot 39, one end of the guide block 40 is fixedly connected with the special printing rod 38, one end of the fixed slot 37 is connected with a second threaded rotating rod 41 through threads, one end of the second threaded rotating rod 41 is attached to one end of the special printing rod 38, the control end of the dryer 25 is electrically connected with the control board 2, a user rotates the first threaded rotating rod 33, the first threaded rotating rod 33 drives the movable block 30 to move towards the middle of the fixed rotating piece 27, at this time, the fixed rod 31 can move towards one side far away from each other through the first threaded rotating rod 33 and the connecting hinge rod 32, so that the fixed rod 31 is inserted into the inside of the fixed teeth 29, the printing roller 5 is locked, at this time, one end of the second threaded rotating rod 41 is not in contact with the printing rod 38 through threads, the second threaded rotating rod 41 can be replaced by the user, the special rotating rod 38 from the inside of the fixed slot 37, the special rotating rod 38 is replaced by the special rotating rod 38, and the special rotating rod 38 is replaced by the special rotating rod 38 in turn, and the special rotating rod 38 is convenient for the special rotating rod 38 is replaced by the user;

Referring to fig. 2 and 8, in the present embodiment, the centering mechanism includes a bottom plate 42, a moving slot 43, a threaded sleeve 44, a reverse threaded rod 45, a second motor 46, a connecting slot 47, a connecting rod 48, a second slide 49, a second slider 50 and a centering plate 51, wherein the bottom plate 42 is fixedly connected to the middle part of the casing 1, the moving slot 43 is provided in the middle part of the bottom plate 42, two sets of threaded sleeves 44 are slidingly connected to the inside of the moving slot 43, the reverse threaded rod 45 is provided in the moving slot 43, the reverse threaded rod 45 is connected with the threaded sleeve 44 through threads, the surface threads of the reverse threaded rod 45 are opposite, one end of the bottom plate 42 is provided with the second motor 46, the output end of the second motor 46 is fixedly connected with one end of the reverse threaded rod 45, one end of the reverse threaded rod 45 is connected with the inner wall of the moving slot 43 through a bearing, the second slide 49 is provided at both ends of the bottom plate 42, one end of the second sliding block 49 is provided with a connecting groove 47, one end of the connecting groove 47 is connected with the moving groove 43, two groups of connecting rods 48 are fixedly connected inside the connecting groove 47, two groups of second sliding blocks 50 are fixedly connected inside the second sliding block 49, one end of each second sliding block 50 is fixedly connected with the centering plate 51, two ends of each connecting rod 48 are respectively fixedly connected with the threaded sleeve 44 and the second sliding block 50, two groups of second sliding blocks 50 are positioned between the second rotating roller 4 and the pressing plate 6, the other two groups of second sliding blocks 50 are positioned between the third rotating roller 8 and the fourth rotating roller 9, the control end of the second motor 46 is electrically connected with the control plate 2, a user controls the second motor 46 to work, the output end of the second motor 46 drives the reverse threaded rod 45 to rotate, the reverse threaded rod 45 can enable the threaded sleeve 44 to move inside the moving groove 43, the moving groove 43 drives the second sliding block 50 and the centering plate 51 to move through the connecting rods 48, the movable centering plate 51 can center the security paper, so that the situation of deviation of the security paper is avoided, the security paper is ensured to be positioned at the center position, and the normal operation of subsequent work is ensured;

Referring to fig. 2 and 4, in this embodiment, the feeding mechanism includes a pigment box 19, a dye box 20, a material pipe 21, a metering pump 22, cotton-dyed 23 and a spray nozzle 24, wherein the inner wall at the top end of the casing 1 is fixedly connected with the pigment box 19, the middle part of the casing 1 is fixedly connected with the dye box 20, the bottom end of the dye box 20 is close to the surface of the printing roller 5, one side of the pigment box 19 is connected with the material pipe 21, the surface of the material pipe 21 is uniformly connected with the spray nozzle 24, the bottom end of the spray nozzle 24 extends to the inside of the dye box 20, the bottom end of the dye box 20 is provided with the cotton-dyed 23, the cotton-dyed 23 is close to the printing roller 5, the metering pumps 22 are arranged at both ends of the material pipe 21, and the control ends of the metering pumps 22 are electrically connected with the control board 2, the metering pumps 22 spray pigment inside the pigment box 19 to the surface of the cotton-dyed 23 through the spray nozzle 24, and the special printing rod 38 inside the printing roller 5 is coated with the special printing rod 38 through the cotton-dyed 23, thereby facilitating the printing work of the special printing rod 38 to coat fuel;

referring to fig. 2, 3 and 9, in this embodiment, the slitting mechanism includes a slitting wheel 75, a slitting plate 52, an adjusting groove 53, an adjusting block 54, an adjusting rod 55, a scale mark 56, a slitting roller 57 and a stepping motor 58, the slitting plate 52 is disposed at the bottom end of the slitting roller 12, two ends of the slitting plate 52 are fixedly connected with the housing 1, the slitting wheel 75 is uniformly disposed on the surface of the slitting roller 12, the scale mark 56 is disposed on the surface of the slitting roller 12, three groups of adjusting grooves 53 are uniformly disposed on the surface of the slitting roller 12, the adjusting block 54 is slidably connected inside the adjusting groove 53, one end of the adjusting block 54 is fixedly connected with the slitting wheel 75, one end of the adjusting block 54 is connected with the adjusting rod 55 through threads, one end of the adjusting rod 55 is abutted against the inner wall of the adjusting groove 53, one end of the slitting roller 52 is provided with the slitting roller 57 through a bearing, one end of the slitting roller 57 is fixedly connected with one end of the slitting roller 57 through a bearing, the control end of the stepping motor 58 is electrically connected with the control plate 2, the slitting roller 58 can be electrically connected with the control plate 58 through the control plate 55, and the slitting roller 75 can be conveniently rotated by the stepping motor 75 when the user can rotate the slitting roller 75 through the adjusting rod, and the rotating the adjusting rod 55 through the rotating the adjusting rod has a rotating distance between the adjusting rod and the adjusting rod 75;

Referring to fig. 2, 3, 10, 11 and 12, in the present embodiment, the unreeling mechanism includes a winding drum 59, a winding groove 60, a retaining plate 61, a fixing member 62, a torsion spring 63, a supporting member 64, a third threaded rotating rod 65, an electric push rod 66, a fixed arc plate 67, a second rotating wheel 68, a third sliding groove 69, a third sliding block 70, a guiding groove 71 and a guiding plate 72, the winding drum 59 is uniformly disposed on the surface of a group of material rollers 13, the winding groove 60 is uniformly disposed on the surface of the material rollers 13, the retaining plate 61 is disposed inside the winding groove 60, one end of the retaining plate 61 is provided with the fixing member 62, two ends of the fixing member 62 are fixedly connected with the inner wall of the winding groove 60, one end of the retaining plate 61 is provided with the torsion spring 63, two ends of the torsion spring 63 are fixedly connected with the retaining plate 61 and the fixing member 62, the supporting member 64 is slidingly connected inside the material rollers 13, and the middle part of the retaining member 64 is uniformly inclined, two groups of third sliding grooves 69 are formed at two ends of the machine shell 1, a third sliding block 70 is slidably connected inside the third sliding groove 69, guide grooves 71 are symmetrically formed at the inner wall of the third sliding groove 69, guide plates 72 are slidably connected inside the guide grooves 71, one ends of the guide plates 72 are fixedly connected with the third sliding block 70 respectively, two ends of a material roller 13 are connected with the third sliding block 70 through bearings, one end of the material roller 13 is connected with a third threaded rotating rod 65 through a thread, one end of the third threaded rotating rod 65 is connected with one end of a supporting piece 64 through a bearing, the other end of the third threaded rotating rod 65 extends to the outside of the third sliding block 70 through the material roller 13, two groups of electric push rods 66 are arranged at two ends of the machine shell 1, the output of the electric push rods 66 is fixedly connected with a fixed arc plate 67, the fixed arc plate 67 is semicircular, the inside of the fixed arc plate 67 is uniformly connected with a second rotating wheel 68 through a bearing, the surfaces of the second rotating wheels 68 are all attached to the material rollers 13, the control ends of the electric push rods 66 are electrically connected with the control panel 2, a user rotates the third threaded rotary rod 65 again, so that the third threaded rotary rod 65 drives the abutting piece 64 to move, at the moment, the abutting piece 64 does not abut against the abutting piece 61, at the moment, the abutting piece 61 rotates towards the inside of the material rollers 13 under the action of the torsion spring 63, the user sleeves the security paper rolls and the winding drums 59 on the surfaces of the two groups of material rollers 13 respectively, the security paper rolls and the winding drums 13 are located at proper positions, then reversely rotates the third threaded rotary rod 65, at the moment, the inclined surfaces of the abutting piece 64 abut against the abutting piece 61, so that the abutting piece 61 rotates outwards, simultaneously compresses the torsion spring 63 until the abutting piece 61 abuts against the security paper rolls and the winding drums 59, so that the security paper rolls and the winding drums 59 are fixed through the abutting piece 61, then the user places the material rollers 13 at the two ends of the machine shell 1, the third sliding block 70 slides in the inside of the third sliding groove 69, the material rolls 13 and the first gear 14 are located and meshed through the third sliding block 70 and the third sliding block 72, then the material rolls and the first gear 14 are meshed, and the material rolls are mounted and the second gear 14 are meshed, and the material rolls are mounted on the other group 13, and the material rolls are convenient to mount and dismounted, and the material rolls are assembled and released when the material rolls are attached to the 13 and assembled and the work 13 are convenient to use;

It should be noted that, the control end of the control board 2 is electrically connected with an external power supply, and the control end of the first motor 17 is electrically connected with the control board 2, so that a user can conveniently control the device to work;

the printing method of the device comprises the following steps:

step one: changing, the user rotates the first screw thread rotating rod 33, the fixing rod 31 can be inserted into the fixing teeth 29 through the first screw thread rotating rod 33 and the connecting hinge rod 32, so that the printing roller 5 is locked, at the moment, the user rotates the second screw thread rotating rod 41, then the special printing rod 38 is taken down, the special printing rod 38 is replaced by the needed special printing rod 38, then the special printing rod 38 is fixed, the printing roller 5 is unlocked through rotating the first screw thread rotating rod 33, and at the moment, the replacement is finished;

step two: fixing the security paper, firstly, rotating a third threaded rotating rod 65 by a user to enable a supporting piece 64 not to collide with a supporting plate 61, at the moment, collecting the supporting plate 61 inside a material roller 13, respectively sleeving the security paper roll and a winding drum 59 on the surfaces of two groups of material rollers 13 to enable the security paper roll and the winding drum 59 to be in proper positions, then rotating the third threaded rotating rod 65 to fix the security paper roll and the winding drum 59, then placing the material roller 13 at two ends of a machine shell 1 by the user, positioning and guiding the material roller 13 and a first gear 14 through a third sliding block 70 and a guide plate 72, and then enabling a fixed arc plate 67 to ascend until the fixed arc plate is attached to the material roller 13;

Step three: centering, the security paper passes through the device, one end of the security paper is fixed with the winding drum 59, the user controls the second motor 46 to work, and the security paper can be centered through the thread sleeve 44, the reverse threaded rod 45, the connecting rod 48 and the centering plate 51;

step four: after adjusting the slitting interval, a user rotates the adjusting rod 55, the slitting wheel 75 can be moved, the slitting interval is controlled through the scale marks 56, and after the adjustment is finished, the slitting interval is fixed through rotating the adjusting rod 55;

step five: the printing is carried out by controlling the device through a control panel 2, the output of a first motor 17 drives a material roller 13, a second rotary roller 4, a printing roller 5, a fourth rotary roller 9 and a slitting roller 12 to rotate through a transmission belt 18, a second gear 15, a first gear 14 and an auxiliary wheel 16, at this time, the security paper moves, a metering pump 22 sprays pigment in a pigment box 19 onto the surface of a cotton-dyed layer 23 through a spray nozzle 24, a special printing rod 38 in the printing roller 5 is smeared through the cotton-dyed layer 23, the security paper is stamped through the special printing rod 38, printing is carried out at the same time, so that a special security is formed, a dryer 25 can carry out quick drying operation on the pigment, the pressing and cutting interval of a pressing and cutting roller 57 can be controlled through a stepping motor 58 and a stepping motor 58, the slitting roller 12 and a cutting roller 75 rotate, at this time, one group of material rollers 13 carry out paper release, and the other group of material rollers 13 carry out paper collecting operation.

Working principle: when the device is used by a user, the connecting push plate 74 is pushed firstly, then the user passes through the replacement opening 11 until the interior of the printing roller 5, the user rotates the first threaded rotary rod 33, the first threaded rotary rod 33 drives the movable block 30 to move towards the middle part of the fixed rotary piece 27, at the moment, the fixed rod 31 can move towards the side far away from each other through the first threaded rotary rod 33 and the connecting hinge rod 32, so that the fixed rod 31 is inserted into the interior of the fixed teeth 29, the printing roller 5 is locked, at the moment, the user rotates the second threaded rotary rod 41, so that one end of the second threaded rotary rod 41 is not in contact with the special printing rod 38 any more, at the moment, the user can take the special printing rod 38 out of the interior of the fixed groove 37, then the user sequentially takes the special printing rod 38 out, and then the special printing rod 38 is replaced into the required special printing rod 38, and the special printing rod 38 is conveniently positioned and guided through the right-angle groove 39 and the guide block 40, then the second screw thread rotating rod 41 is rotated to fix the printing roller 5, the first screw thread rotating rod 33 is reversely rotated to unlock the printing roller 5, the replacement is completed at the moment, so that the user can replace the special printing rod 38 quite simply and conveniently, the user rotates the third screw thread rotating rod 65 again, so that the third screw thread rotating rod 65 drives the abutting piece 64 to move, the abutting piece 64 does not abut against the abutting piece 61 at the moment, the abutting piece 61 rotates towards the inside of the material roller 13 under the action of the torsion spring 63 at the moment, the user sleeves the securities paper roll and the winding drum 59 on the surfaces of the two groups of material rollers 13 respectively to enable the securities paper roll and the winding drum 13 to be in a proper position, then reversely rotates the third screw thread rotating rod 65, at the moment, the inclined surface of the abutting piece 64 abuts against the abutting piece 61, so that the abutting piece 61 rotates outwards, and compresses the torsion spring 63 until the abutting piece 61 abuts against the securities paper roll and the winding drum 59, the stock paper roll and the winding drum 59 are fixed through the abutting plate 61, then the user places the stock roll 13 at two ends of the machine shell 1, so that the third sliding block 70 slides in the third sliding groove 69, the third sliding block 70 and the guide plate 72 are used for positioning and guiding, so that the stock roll 13 and the first gear 14 are meshed, then the electric push rod 66 is controlled to work, the fixed arc plate 67 is lifted until the stock roll 13 is attached, at the moment, the installation is finished, so that the user can conveniently disassemble and assemble the winding drum 59, the user passes the stock paper through the device, so that the stock paper is positioned between the top end of the first rotating roll 3, the bottom end of the second rotating roll 4, the top end of the auxiliary roll 7, the top end of the third rotating roll 8, the top end of the fourth rotating roll 9 and the fifth rotating roll 10 and the top end of the cutting plate 52, one end of the cutting plate 52 is fixed with the winding drum 59, the user controls the second motor 46 to work, the output end of the second motor 46 drives the reverse threaded rod 45 to rotate, the reverse threaded rod 45 can enable the thread sleeve 44 to move in the moving groove 43, the moving groove 43 drives the second sliding block 50 and the centering plate 51 to move through the connecting rod 48, the moving centering plate 51 can center the certificate paper, so that the situation of deviation is avoided, follow-up slitting and collecting work is facilitated, then a user adjusts the slitting interval again, after rotating the adjusting rod 55, the cutting wheel 75 can be moved, the slitting interval is controlled through the scale mark 56, after adjusting, the slitting interval is fixed through rotating the adjusting rod 55, the slitting interval is convenient to adjust, at the moment, the user controls the device to print through the control board 2, the output of the first motor 17 drives the feed roller 13, the second rotary roller 4, the printing roller 5, the fourth rotary roller 9 and the slitting roller 12 to rotate through the driving belt 18, the second gear 15, the first gear 14 and the auxiliary wheel 16, at this moment, the security paper moves, the printing roller 5 rotates and the metering pump 22 starts to work, the metering pump 22 sprays pigment in the pigment box 19 to the surface of the dyeing cotton 23 through the spray nozzle 24, the special printing rod 38 in the printing roller 5 is smeared through the dyeing cotton 23, thereby facilitating the printing work of the special printing rod 38, during printing, the special printing rod 38 is used for stamping the security paper and simultaneously printing the security paper, thereby forming special securities, the dryer 25 can carry out quick drying work on the pigment, meanwhile, the output end of the stepping motor 58 drives the pressing and cutting roller 57 to work, the rotating slitting roller 12 drives the slitting wheel 75 to rotate, the slitting wheel 75 carries out slitting work, one group of material rollers 13 carries out paper placing, and the other group of material rollers 13 carries out paper collecting work, thereby facilitating the user to replace the special printing rod 38, facilitating the user to print different patterns, simultaneously carrying out centering work, thereby avoiding the phenomenon that the security paper shifts in printing, ensuring the follow-up work to carry out, the slitting work, and the printing device can carry out simple and convenient and rapid printing work, and the production cost is greatly improved, the cost is saved for the user.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a security printing device for printing securities, its characterized in that, including casing (1), feed mechanism, locking change mechanism, centering mechanism, slitting mechanism and unreeling mechanism, the middle part of casing (1) is provided with control panel (2), the one end of casing (1) is provided with first roller (3), one side of first roller (3) is provided with second roller (4), the middle part of casing (1) is provided with printing roller (5), the bottom of printing roller (5) is provided with clamp plate (6), and the both ends of clamp plate (6) all with casing (1) fixed connection, the one end of clamp plate (6) is connected with auxiliary roller (7) through the bearing, one side of printing roller (5) is provided with third roller (8), one side of third roller (8) is provided with fourth roller (9), the top of fourth roller (9) is provided with fifth roller (10), the middle part of casing (1) is provided with changes mouth (11), the one end of cutting of casing (1) is provided with gear (12), both ends (13) are all connected with first roller (13) through the bearing (13), and the second gear (15) is respectively meshed with the first gear (14), one side of the casing (1) is connected with four groups of auxiliary wheels (16) through bearings, one side of the casing (1) is provided with a first motor (17), one side of the casing (1) is provided with a driving belt (18), two ends of the first rotating roller (3) and the fifth rotating roller (10) are connected with the casing (1) through bearings, one ends of the second rotating roller (4), the printing roller (5), the third rotating roller (8), the fourth rotating roller (9) and the slitting roller (12) are positioned outside the casing (1), one ends of the second rotating roller (4), the third rotating roller (8), the fourth rotating roller (9) and the slitting roller (12) are connected with the casing (1) through bearings, the surface of the driving belt (18) is connected with the output end of the first motor (17), the rotating shaft of the second gear (15), the surface of the auxiliary wheels (16) and the second rotating roller (4), the printing roller (5), the fourth rotating roller (9) and the slitting roller (73) are connected with one end of the push plate (73), one side of the push plate (73) is connected with the push plate (73), the replacement port (11) corresponds to one end of the printing roller (5);

The feeding mechanism comprises a pigment box (19), a dye box (20), a material pipe (21), a metering pump (22), dyeing cotton (23) and a spray head (24), wherein the pigment box (19) is fixedly connected to the inner wall of the top end of the machine shell (1), the middle part of the machine shell (1) is fixedly connected with the dye box (20), the bottom end of the dye box (20) is close to the surface of a printing roller (5), one side of the pigment box (19) is connected with the material pipe (21), the surface of the material pipe (21) is uniformly connected with the spray head (24), the bottom end of the spray head (24) extends to the inside of the dye box (20), the bottom end of the dye box (20) is provided with the dyeing cotton (23), the dyeing cotton (23) is close to the printing roller (5), the metering pump (22) is arranged at both ends of the material pipe (21), and the control end of the metering pump (22) is electrically connected with a control board (2).

The locking replacement mechanism comprises a dryer (25), a rotary groove (26), a fixed rotary part (27), a first rotary wheel (28), fixed teeth (29), a movable block (30), a fixed rod (31), a connecting hinge rod (32), a first threaded rotary rod (33), a first sliding groove (34), a first sliding block (35), a printing groove (36), a fixed groove (37), a special printing rod (38), a right angle groove (39), a guide block (40) and a second threaded rotary rod (41), wherein the dryer (25) is arranged in the middle of the shell (1), the dryer (25) is arranged between a third rotary roller (8) and a fourth rotary roller (9), the rotary groove (26) is formed in one end of the printing roller (5), the fixed rotary part (27) is arranged at one end of the printing roller (5), one end of the fixed rotary part (27) is fixedly connected with the shell (1), one side of the fixed rotary part (27) is rotationally connected with the rotary groove (26) through a bearing, the first rotary wheel (28) is connected with one side of the fixed rotary part (27) through the bearing, the fixed rotary wheel (29) is arranged at one end of the printing roller (5), the fixed rotary wheel (29) is provided with the fixed rotary wheel (29) at one end of the fixed rotary wheel (29), one end of the fixed rotating piece (27) is symmetrically and slidingly connected with a fixed rod (31), one end of the fixed rod (31) is connected with a connecting hinge rod (32) through a rotating shaft, one end of the connecting hinge rod (32) is connected with a movable block (30) through the rotating shaft, one end of the movable block (30) is connected with a first threaded rotating rod (33) through a bearing, one end of the first threaded rotating rod (33) penetrates through the fixed rotating piece (27) to extend to the outside of the shell (1), two groups of first sliding grooves (34) are formed in one side of the fixed rotating piece (27), the inside of the first sliding grooves (34) is slidingly connected with a first sliding block (35), one end of the first sliding block (35) is fixedly connected with the fixed rod (31) respectively, printing grooves (36) are uniformly formed in the surface of the printing roller (5), the inner wall of the printing roller (5) is uniformly and fixedly connected with the fixed grooves (37) respectively corresponding to the printing grooves (36), the inside of the fixed grooves (37) are slidingly connected with special printing grooves (38) respectively, right-angle printing grooves (39) are formed in the inside of the fixed grooves (39) respectively, one end of the guide block (40) is fixedly connected with the special printing rod (38), one end of the fixing groove (37) is connected with a second threaded rotating rod (41) through threads, one end of the second threaded rotating rod (41) is attached to one end of the special printing rod (38), and the control end of the dryer (25) is electrically connected with the control board (2);

The centering mechanism comprises a bottom plate (42), a moving groove (43), a thread sleeve (44), a reverse threaded rod (45), a second motor (46), a connecting groove (47), a connecting rod (48), a second sliding (49), a second sliding block (50) and a centering plate (51), wherein the bottom plate (42) is fixedly connected with the middle part of the machine shell (1), the moving groove (43) is formed in the middle part of the bottom plate (42), two groups of thread sleeves (44) are slidably connected in the moving groove (43), the reverse threaded rod (45) is arranged in the moving groove (43), the reverse threaded rod (45) is connected with the thread sleeve (44) through threads, the surface threads of the reverse threaded rod (45) are opposite in direction, one end of the bottom plate (42) is provided with the second motor (46), the output end of the second motor (46) is fixedly connected with one end of the reverse threaded rod (45), one end of the reverse threaded rod (45) is connected with the inner wall of the moving groove (43) through a bearing, two ends of the bottom plate (42) are both provided with the second sliding (49), one ends of the second sliding rod (47) are both connected with the connecting groove (47), two groups of connecting rods (48) are fixedly connected to the inside of the connecting groove (47), two groups of second sliding blocks (50) are fixedly connected to the inside of the second sliding block (49), one ends of the second sliding blocks (50) are fixedly connected to the middle plate (51), two ends of the connecting rods (48) are fixedly connected with the threaded sleeve (44) and the second sliding blocks (50) respectively, two groups of second sliding blocks (50) are located between the second rotating roller (4) and the pressing plate (6), the other two groups of second sliding blocks (50) are located between the third rotating roller (8) and the fourth rotating roller (9), and the control end of the second motor (46) is electrically connected with the control plate (2);

The unreeling mechanism comprises a reeling drum (59), a reeling groove (60), a retaining plate (61), a fixing piece (62), a torsion spring (63), a supporting piece (64), a third threaded rotating rod (65), an electric push rod (66), a fixing arc plate (67), a second rotating wheel (68), a third sliding groove (69), a third sliding block (70), a guide groove (71) and a guide plate (72), wherein the reeling drum (59) is arranged on the surface of the material roller (13), the reeling groove (60) is uniformly formed on the surface of the material roller (13), the retaining plate (61) is arranged in the reeling groove (60), one end of the retaining plate (61) is provided with the fixing piece (62), two ends of the fixing piece (62) are fixedly connected with the inner wall of the reeling groove (60), one end of the retaining plate (61) is provided with the torsion spring (63), two ends of the torsion spring (63) are fixedly connected with the retaining plate (61) and the fixing piece (72) respectively, the inner part (64) is connected in a sliding manner, the inner part (64) of the material roller (13) is uniformly provided with the inner sliding manner, two ends of the retaining plate (64) are uniformly connected with the sliding grooves (69), two ends of the third sliding groove (69) are uniformly connected with the inner sliding groove (70), the inner wall of the third sliding groove (69) is symmetrically provided with a guide groove (71), the inside of the guide groove (71) is slidably connected with a guide plate (72), one end of the guide plate (72) is fixedly connected with a third sliding block (70) respectively, two ends of the material roller (13) are connected with the third sliding block (70) through bearings, one end of the material roller (13) is connected with a third threaded rotating rod (65) through threads, one end of the third threaded rotating rod (65) is connected with one end of a supporting piece (64) through bearings, the other end of the third threaded rotating rod (65) extends to the outside of the third sliding block (70) through the material roller (13), two groups of electric pushing rods (66) are arranged at two ends of the casing (1), the output ends of the electric pushing rods (66) are fixedly connected with fixed arc plates (67), the inside of the fixed arc plates (67) are all semicircular, the fixed arc plates (67) are uniformly connected with second rotating wheels (68) through bearings, the surfaces of the second rotating rods (68) are all attached to the rotating wheels, and the electric pushing rods (13) are attached to the electric control plates (2).

2. A security printing device for printing securities as claimed in claim 1, wherein: the control end of the control board (2) is electrically connected with an external power supply, and the control end of the first motor (17) is electrically connected with the control board (2).

3. A security printing device for printing securities as claimed in claim 1, wherein: the slitting mechanism comprises a slitting wheel (75), a slitting plate (52), an adjusting groove (53), an adjusting block (54), an adjusting rod (55), a scale mark (56), a pressing and cutting roller (57) and a stepping motor (58), wherein the slitting plate (52) is arranged at the bottom end of the slitting roller (12), the two ends of the slitting plate (52) are fixedly connected with the machine shell (1), the slitting wheel (75) is uniformly arranged on the surface of the slitting roller (12), the scale mark (56) is arranged on the surface of the slitting roller (12), three groups of adjusting grooves (53) are uniformly arranged on the surface of the slitting roller (12), the adjusting block (54) is slidably connected with the inside of the adjusting groove (53), one end of the adjusting block (54) is fixedly connected with the slitting wheel (75) respectively, one end of the adjusting block (54) is provided with the adjusting rod (55) through threaded connection, one end of the adjusting rod (55) is abutted against the inner wall of the adjusting groove (53), one end of the slitting plate (52) is provided with the pressing and cutting roller (57), one end of the pressing roller (57) is connected with the machine shell (58) through the bearing (58), one end of the stepping motor (58) is fixedly connected with the stepping motor (58), the control end of the stepping motor (58) is electrically connected with the control board (2).

4. A printing method for a security printing apparatus for printing securities as claimed in claim 3, characterized in that:

step one: changing, a user rotates the first threaded rotating rod (33), the fixing rod (31) can be inserted into the fixing teeth (29) through the first threaded rotating rod (33) and the connecting hinge rod (32), so that the printing roller (5) is locked, at the moment, the user rotates the second threaded rotating rod (41), then the special printing rod (38) is taken down and replaced by the needed special printing rod (38), then the special printing rod is fixed, and the printing roller (5) is unlocked through rotating the first threaded rotating rod (33), so that the replacement is finished;

step two: fixing the security paper, firstly, rotating a third threaded rotating rod (65) by a user to enable a supporting piece (64) not to be in contact with a supporting plate (61), at the moment, collecting the supporting plate (61) inside a material roller (13), sleeving the security paper roll and a winding drum (59) on the surfaces of two groups of material rollers (13) respectively to enable the security paper roll and the winding drum to be in proper positions, then rotating the third threaded rotating rod (65) to fix the security paper roll and the winding drum (59), then placing the material roller (13) at two ends of a shell (1) by the user, positioning and guiding the material roller (13) and a first gear (14) through a third sliding block (70) and a guide plate (72), and then enabling a fixed arc plate (67) to ascend until the fixed arc plate is attached to the material roller (13);

Step three: centering, namely enabling the security paper to pass through the device, enabling one end of the security paper to be fixed with a winding drum (59), controlling a second motor (46) to work by a user, and centering the security paper through a thread sleeve (44), a reverse threaded rod (45), a connecting rod (48) and a centering plate (51);

step four: after adjusting the slitting interval, a user rotates the adjusting rod (55), the slitting wheel (75) can be moved, the slitting interval is controlled through the scale marks (56), and after adjustment, the slitting interval is fixed by rotating the adjusting rod (55);

step five: printing, the user passes through control panel (2) control this device work, the output of first motor (17) passes through drive belt (18), second gear (15), first gear (14) and auxiliary wheel (16) drive material roller (13), second commentaries on classics roller (4), printing roller (5), fourth commentaries on classics roller (9) and slitting roller (12) rotate, the bond paper moves this moment, metering pump (22) spouts the pigment of pigment case (19) inside to the surface of dyeing cotton (23) through shower nozzle (24), smear through the special printing pole (38) of dyeing cotton (23) to printing roller (5) inside, carry out printing work when carrying out the impression to the bond paper through special printing pole 38, thereby form purpose-made securities, dryer (25) can carry out quick stoving work to pigment, the interval of pressing and cutting roller (57) are cut through control to the rotational speed of step motor (58), cutting roller (12) and slitting roller (75) are cut work this moment, a set of material roller (13) carries out paper feeding, another material roller (13) receive paper work.