WO2013166672A1 - Associated printing apparatus - Google Patents

Description

 Joint printing device

 The present invention relates to a joint printing apparatus for security documents (especially securities), which enables simultaneous printing of three printing processes of screen, print magnetic orientation and relief by one printing. Background technique

 Most of the existing security printing equipment can only complete the printing of one printing process. For example: Single-sheet single-sided rotary screen printing equipment can only print in the screen printing process, and the letterpress printing equipment can only realize the printing of the letterpress printing process. When the printing requires a variety of printing processes to complete the printing, it can only be printed sequentially by means of different single-process printing equipment. Therefore, in a production line, it is necessary to prepare a certain number of different printing process equipments such as screen printing and letterpress printing according to the production capacity. Since all kinds of equipments need to be equipped with a sheet transfer device, the production line is long and the required plant is required. The area is large and the production cost is increased.

 Chinese Patent No. 200410084389. 9 discloses a self-adhesive rotary printing machine which is composed of a paper feeding portion, a paper receiving device, a screen printing portion, a satellite letterpress printing portion, etc., and a screen printing unit and a letterpress printing machine. Cooperate, but it can't realize the comprehensive printing of three processes of screen, printed magnetic orientation and letterpress by one paper.

 Chinese Patent No. 200880005435. 8 discloses a "roller body for orienting a magnetic sheet contained in an ink or varnish carrier applied to a sheet-like or web-like substrate, which is known to have a magnetic field. The position between the drum main body 10 and the shaft member in the circumferential direction of the device is relatively determined and synchronously rotated, so that when the printed sheet is transferred to the drum main body 10, it will always be in an adsorbed state, especially during the transfer of the printed sheets. The sheet is also adsorbed on the drum body. Therefore, when the sheet conveying system of the drum main body 10 having the magnetic field generating means in the known structure performs the sheet transfer of the sheet conveying system between the other drums or the apparatus, the accuracy and stability of the adsorption force of the drum main body 10 to the sheet transfer is stable. It will have a certain impact, so the well-known structure in the continuous production process, the transfer of the printed sheet between the drum and the drum is not smooth, the accuracy is poor, affecting the quality of the printed product. Therefore, the drum main body 10 of the known structure is more suitable for use in the printing apparatus shown in Fig. 13 where there is no sheet transfer. Further, in the known structure, the suction hole on the central axis of the magnetic orientation roller can selectively realize the conversion of the suction and non-suction functions by inserting the element, but the structure is relatively long due to the need for timely setting. Complex, increasing the labor intensity in production. Moreover, since the axial position of the magnetic field generating device of the prior art on the annular support portion is not adjustable, the installation position of the annular support portion in the axial direction of the central axis can only be adjusted, which largely limits the position adjustment of the magnetic field generating device. flexibility.

 Since the screen printing ink layer is thick, it needs to be dried to ensure the quality of the printed product. In the existing screen printing equipment, the printing of the printing mostly adopts the combination of hot air drying and infrared drying or UV drying. The combined drying form has a large drying space and not only occupies a large space of equipment. And there is a problem that the printed product cannot be dried in time and affects the quality of the printed product. For this reason, a device capable of drying the ink on the surface of the printed sheet with ultraviolet rays has been developed, in which a printing cylinder having a cooling function is required, and the surface of the printed sheet is cooled while being dried to improve the printing sheet during the drying process. Security. For example, in the "Ultraviolet Infrared Drying Two-Selecting Device for Printing Machines" disclosed in Chinese Patent No. 200820009427. 8, a cooling type conveying flat roll is described, which is disposed in the lower part of the ultraviolet light box, and the inside thereof is Hollow, the cooling water is transported into the cavity of the cooling transport flat roll through the water pipe and the rotating wide assembly. When the printed sheet is dried by the ultraviolet light box, in order to avoid the high temperature of the ultraviolet light box, the film type sheet is contracted and deformed. Open the rotating wide assembly and fill the inside of the cooling conveyor flat roller with cold water to absorb the heat on the surface of the sheet.

The printing process is a complicated process, and the known cooling type conveying flat roller structure can only function to cool the surface of the printing sheet, but when the cooling conveying flat roller does not interface with other paper conveying rollers, the printing sheet floats. It is located on the surface of the conveying flat roller, causing the unevenness of the printed sheet during the transfer. For example, the tail of the printed sheet will drift during the transfer, and the different parts of the printed sheet will not be guaranteed during the transfer. Hold on the same plane and so on.

 In short, existing printing equipment and equipment, for a large number of products, and integrated processing-based printing manufacturers, the current production line can only be configured to achieve a separate printing process or a combination of two printing processes, thus resulting in equipment investment High cost and management costs, long production cycle, and high manual investment. At the same time, the maintenance cost is increased, resulting in higher production costs and affecting market competitiveness. In addition, since screen printing requires a relatively large drying system, the existing printing apparatus having an integrated process also has a large defect in the production line and the warehouse floor.

 In view of the defects of the above-mentioned known technologies, the inventors have developed the joint printing of the present invention capable of realizing three printing processes of screen printing, magnetic orientation of printing, and letterpress printing based on years of experience in production design in the field and related fields. The device solves the problems of whether the printed graphic will be dirty when the printing sheet is transferred between the printing units, whether the printed sheet needs to be turned over, and the transmission route is as short as possible, that is, the invention can meet the printing needs to ensure the printing quality, and greatly Shorten the delivery route and reduce the size of the equipment. Summary of the invention

 It is an object of the present invention to provide a rotary multi-process single-sided printing apparatus, and more particularly to a joint printing apparatus which performs screen printing, print magnetic orientation, and relief printing by one printing.

 Another object of the present invention is to provide a magnetic directional roller which can adapt to different printing needs, is easy to adjust, has a simple structure, and can effectively improve the quality of printed products.

 It is still another object of the present invention to provide a dry transfer cylinder for adsorbing and cooling sheets during sheet or web printing.

 To this end, the joint printing apparatus proposed by the present invention comprises: at least one set of ink photocuring unit and a screen printing unit arranged in sequence, an ink magnetic sheet based magnetic orientation unit, and a letterpress printing unit, each of which passes through The paper system is connected.

 The joint printing device as described above, wherein the ink photocuring unit has a UV drying device and/or an infrared drying device, and a dry transfer roller capable of cooling and adsorbing the printed sheets; the dry transfer roller is a rotary air width The drum body and the mandrel, wherein the drum body is rotatably sleeved on the mandrel, and a gas chamber is formed between the drum body and the mandrel; the mandrel is connected to the air suction device, And the gas in the gas chamber can be sucked; the roller wall of the drum body is provided with a cooling passage connected to the cooling water pipe, and an adsorption air hole capable of being electrically connected to the air chamber.

 The joint printing device as described above, wherein the ink magnetic sheet-based magnetic orientation unit is a magnetic orientation roller, the magnetic orientation roller comprises: a rotary air width, the rotary air width has a core shaft, and is rotatably sleeved on a drum body outside the mandrel, a gas chamber is formed between the drum body and the mandrel; the mandrel is connected to the air suction device, and can suck the gas in the gas chamber; The wall is provided with a through hole that can be electrically connected to the air chamber; an annular support portion, a plurality of the annular support portions are axially disposed outside the drum body, and the outer circumference of each of the annular support portions is embedded a plurality of magnetic field generating devices, and a first adsorption hole communicating with the through hole; a cover plate having a plurality of second adsorption holes uniformly disposed thereon, wherein the cover plate is coated on the plurality of annular supports The exterior of the department.

 Compared with the prior art, the features and advantages of the present invention are:

 The joint printing device of the invention can realize the screen printing and the ink magnetic sheet by one printing on one side of the sheet through the paper feeding portion, the paper feed roller, the first paper conveying roller, the printing portion and the delivery portion. The basic printing process of base magnetic orientation and letterpress printing completes the process from paper feeding to printing to delivery.

In the invention, since the printing sheet is input once in one printing device, the continuous printing operation can be completed through continuous screen printing, magnetic orientation of the printing product, and letterpress printing, and the finished finished product is sent to the delivery section, so Compared with the prior art, the invention can greatly shorten the production cycle, reduce equipment investment, save production and warehouse space occupation, and reduce manual investment. The invention is applicable to, but not limited to, secure printing of security documents and securities. In the present invention, the printed product is dried by a single UV drying form or a single infrared drying or a combination of UV drying and infrared drying, that is, the ink photocuring unit of the present invention has a short drying route and is relatively easy to ensure. The quality of printed products, especially for the printing of magnetically oriented prints, is especially important for drying in time. The invention transmits in the drying process of the printing product through the drying paper conveying roller, and the printing sheet adsorption function on the drying paper conveying roller makes the printing of the printing product more stable and flat during the drying process, and the cooling passage provided thereon ensures the smoothness of the printing sheet. At the same time of transfer, the surface of the printed sheet can be cooled, especially when the printed sheet is dried, the surface temperature of the printed sheet can be effectively reduced, the loss of moisture of the paper can be reduced, the shrinkage deformation of the printed sheet can be avoided, and the drying effect and safety of the printed product can be ensured. Sex.

 In addition, the dry paper transfer roller and the magnetic orientation roller of the invention adopt a rotary air wide structure, and the regions in the circumferential working range of the dry paper transfer roller and the magnetic orientation roller are divided into two regions having an adsorption function and no adsorption function. The suction and non-suction functions can be freely converted, and the structure of the invention is simple compared with the prior art, and the reasonable setting of the transfer position between the rollers ensures that the print transfer process is always in an area where the adsorption function is not provided, thereby The printing sheet intersection error is eliminated, and the stability of the printed product is improved. At the same time, the adsorption force on the surface of the drum reduces the unstable factors such as the sheet flow during the magnetization of the printed product, and improves the quality of the magnetic orientation of the printed pattern.

 Moreover, the dry transfer roller and the magnetic orientation roller of the present invention are each provided with at least one set of gripper rows for the transfer and transfer of the printed sheets during printing or magnetic orientation, thereby ensuring the quality of the printed magnetic orientation pattern.

 The screen plate cylinder of the invention adopts independent servo drive control technology, so that the screen plate cylinder does not need to idle with the main machine without printing, and ensures that the non-image portion of the screen cylinder is stopped in time after the pressure is removed. Directly below the drum, ink leakage and ink squeezing of the screen cylinder are largely avoided, thereby reducing waste generated by restarting after shutdown.

 In the invention, after the screen printing is completed, it is required to complete the multiple transfer to the drying unit between the second paper transfer roller, the magnetic orientation roller and the third paper transfer roller, in order to ensure that the printed graphic during the transfer of the printed sheet is not Dirty, the second transfer roller and the third transfer roller of the present invention both adopt a air-cushion roller, so that the printed sheet is always attached to the air cushion formed by the negative pressure during the transfer process, and the printed surface of the printed sheet and The non-image surface is never in contact with the roller, which ensures the security of the image is not smashed. DRAWINGS

 The following drawings are only intended to illustrate and explain the present invention, and do not limit the scope of the invention. among them,

 Figure 1 is a schematic structural view of a joint printing apparatus of the present invention;

 1A is a structural schematic view of another embodiment of the joint printing apparatus of the present invention, wherein a paper passing system adopts a chain paper conveying mechanism; and FIG. 2 is a structural principle of the magnetic oriented roller in the magnetic magnetic unit based magnetic phase unit of the present invention. Figure

 Figure 3 is a cross-sectional view taken along line M-M of Figure 2;

 Figure 3a is a partial enlarged view of the portion H in Figure 3;

 Figure 3b is a partial enlarged view of the portion J in Figure 3;

 Figure 4 is a schematic view showing the structure of an annular support portion of the magnetic directional roller of the present invention and its connection structure with the drum body, wherein the components disposed in the drum body are not shown in the figure;

 Figure 5 is a schematic structural view of a magnetic field generating device of the present invention;

 Figure 6 is a cross-sectional view taken along line B-B of Figure 5;

 Figure 7 is a schematic view showing the structure of a rotary air wide mandrel of the magnetic directional roller of the present invention;

 Figure 8 is a schematic view showing the structure of an ink photocuring unit of the joint printing device of the present invention;

 Figure 9 is a schematic structural view of a dry transfer roller of the ink photocuring unit of the present invention;

 Figure 10 is a cross-sectional view taken along line D-D of Figure 9;

 Figure 11 is a schematic structural view of a mandrel of the dry transfer cylinder of the present invention;

Figure 12 is a cross-sectional view taken along line CC of Figures 7 and 11; Figure 13 is a side view of a printer having a known magnetically oriented roller. detailed description

 The present invention provides a joint printing apparatus comprising: at least one set of ink photocuring units and a screen printing unit arranged in sequence, an ink magnetic sheet based magnetic orientation unit, a letterpress printing unit, between each of the units Connected by a paper transfer system. The invention can input the printed sheets once in one printing device, and can complete the integrated printing operation through continuous screen printing, magnetic orientation, letterpress printing, and send the finished finished products into the delivery section, thus Compared with technology, the invention can greatly shorten the production cycle, reduce equipment investment, save production and warehouse space occupation, and reduce manual investment. The invention is applicable to, but not limited to, secure printing of security documents and securities.

 In order to more clearly understand the technical features, objects and effects of the present invention, the specific embodiments, structures, features and functions of the combined printing device of the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments. In addition, the technical means and functions of the present invention for achieving the intended purpose can be more specifically understood by the description of the embodiments, but the drawings are only for reference and description, and are not intended to limit the present invention. .

 BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view showing the structure of a joint printing apparatus of the present invention. As shown, the joint printing apparatus 100 of the present invention comprises: at least one set of ink photocuring units 3, and a screen printing unit 4, an ink magnetic sheet based magnetic orientation unit 2, and a letterpress printing unit 1, which are disposed in sequence, each The units are connected by a paper transfer system. Wherein, the paper passing system comprises a paper conveying roller and/or a chain paper conveying mechanism.

 In the joint printing apparatus of the present invention, only one ink photocuring unit 3 may be provided, or two ink photocuring units 3 may be provided.

 When an ink photocuring unit 3 is provided, the ink photocuring unit 3 may be disposed before the relief printing unit 1, that is, between the ink magnetic sheet based magnetic orientation unit and the relief printing unit 1; It may be disposed after the relief printing unit 1, that is, between the relief printing unit 1 and the discharge cylinder 107.

 In a specific embodiment shown in Fig. 1, two ink photocuring units 3 are provided, i.e., the ink photocuring unit 3 is provided before and after the relief printing unit 1, respectively. As shown in Fig. 1, in this particular embodiment, the screen printing unit 4 has a screen impression cylinder 114, at least one set of screen cylinders 115 in contact with the screen impression cylinder 114. The relief printing unit 1 has a relief printing cylinder 106, at least one set of relief cylinders 103 in contact with the relief printing cylinder 106, and an ink magnetic sheet based magnetic orientation unit composed of a magnetic orientation cylinder 20. The ink photocuring unit 3 has a UV drying device 110 which is capable of cooling and adsorbing the dried paper transfer cylinder 30 of the sheet. The magnetic orientation roller 20 and the two dry transfer cylinders 30 are sequentially disposed between the screen impression cylinder 114, the relief printing cylinder 106, and the letterpress impression cylinder 106 and the discharge cylinder 107.

 A second transfer roller 113 is disposed between the screen impression cylinder 114 and the magnetic orientation roller 20, and a third transfer cylinder 111 is disposed between the magnetic orientation roller 20 and the dry transfer cylinder 30. A fourth transfer cylinder 108 is disposed between the dry transfer cylinder 30 and the relief impression cylinder 106.

 As shown in FIG. 1A, in a feasible technical solution, an ink photocuring unit 3 is provided only between the ink magnetic sheet-based magnetic orientation unit and the relief printing unit 1; and the dry transfer cylinder 30 and A chain paper conveying mechanism 108' is disposed between the letterpress printing cylinders 106. The other structures are the same as those shown in FIG. 1, and will not be described again.

 Next, a fourth transfer cylinder 108 is provided between the dry transfer cylinder 30 and the relief impression cylinder 106 as an example.

 In a preferred embodiment, the second transfer cylinder 113, the third transfer cylinder 111, and the fourth transfer cylinder 108 are both air-cushion cylinders. When the sheet reaches the air transfer paper roller, the air cushion roller blows air toward the printing sheet, so that a negative pressure is formed between the printing sheet and the inner surface of the roller, and the non-texture surface is attached to the inner surface of the paper conveying roller under the action of the negative pressure, avoiding The printed graphic was smashed.

2 is a structural schematic view of a magnetic directional roller of a magnetic base unit of an ink magnetic sheet according to the present invention; FIG. 3 is a cross-sectional view taken along line MM of FIG. Figure 3a is a partial enlarged view of the portion of Figure 3; Figure 3b is a partial enlarged view of the portion of the magnetically oriented roller of Figure 3; FIG. 5 is a schematic structural view of the magnetic field generating device; FIG. 6 is a cross-sectional view along line BB of FIG. 5; FIG. 7 is a schematic view of the present invention; Schematic diagram of the magnetically oriented mandrel of the magnetically oriented drum. Figure 12 is a cross-sectional view taken along line CC of Figures 7 and 11.

 As shown in Fig. 2, Fig. 3 and Fig. 4, the magnetic orientation roller 20 includes a rotary air gap 21, an annular support portion 22 and a cover plate 23. The rotary air gap 21 has a core shaft 211 and a roller body 212. The roller body 212 is rotatably sleeved outside the mandrel 211, and a gas is formed between the drum body 212 and the mandrel 211. The core shaft 211 is connected to the air suction device and can extract the gas in the air chamber 213; the cylinder wall of the drum body 212 is provided with a through hole that can be electrically connected to the air chamber 213. 2121, wherein, as shown in FIG. 2, the ends of the mandrel 211 are provided with bearings 241, 242 through which the roller body 212 and the mandrel 211 are rotatably coupled. connection. a plurality of the annular support portions 22 are disposed at an outer distance of the drum body 212 at a distance L from each other, and a plurality of magnetic field generating devices 221 are embedded on the outer circumference of each of the annular support portions 22, and The first adsorption hole 222 through which the through hole 2121 communicates is described. The cover plate 23 is uniformly provided with a plurality of second adsorption holes, and the cover plate 23 is covered on the outside of the plurality of annular support portions 22. By providing the cover 23, the flatness of the surface of the printed sheet during transfer is improved.

 Referring to FIG. 3 together, an optional solution is to provide a plurality of the through holes 2121 in the axial direction on the drum body 212, and preferably the through holes 2121 are evenly distributed in the longitudinal direction of the drum body 212. The distribution is such that the print can be stably adsorbed on the cover 23 outside the magnetically oriented roller.

 Further, referring to FIG. 3, 3b and FIG. 4, the outer circumference of the drum body 212 is provided with two key grooves 2122, 2123 in the axial direction, and a plurality of the same as the annular support portion 22 are provided therein. And a connecting key 2124 corresponding in width, and connecting the annular supporting portion 22 and the connecting key 2124 by a connecting bolt 28 to perform axial direction on the outer circumference of the roller body 212 with respect to the annular supporting portion 22 Fixed with circumferential position and adjustment of axial position.

 Wherein, the key grooves 2122, 2123 are preferably T-shaped grooves, and the inner peripheral wall of the annular support portion 22 is provided with two rectangular grooves 223, 224 at positions corresponding to the T-shaped grooves; the connection key 2124 a T-shaped key that cooperates with the T-shaped groove, the width of the rectangular groove 223, 224 in the circumferential direction matches the vertical end width of the T-shaped key, and the vertical end of the T-shaped key is embedded in the The annular support portion 22 is in the rectangular recesses 223, 224, thereby acting as a circumferential limit on the annular support portion 22. In the present invention, by tightening the connecting bolts 28, the upper ends of the two straight ends of the T-shaped connecting keys 2124 are abutted against the T-shaped keyways 2122, 2123, and the frictional force between the connecting keys 2124 and the keyway is used to achieve the annular support. The portion 22 is axially fixed. When it is necessary to move the annular support portion 22 in the axial direction, the connecting bolt 28 is loosened, the connection key 2124 is disengaged from the contact with the key grooves 2122, 2123, and then the connecting key 2124 and the annular support portion 22 are moved axially in the key groove. After reaching the new position, tighten the connecting bolt 28 again to conveniently fix the annular support portion 22.

 Further, the annular support portion 22 includes a support ring 225 and a pressure plate 226, and the pressure plate 226 and the support ring 225 are fastened by screws. An annular groove 2251 is disposed on both sides of the support ring 225. The magnetic field generating device 221 is disposed in the annular groove 2251, and is respectively disposed by the pressing plate 226 and the plurality of set screws 227. The magnetic field generating means 221 are respectively fixed to the corresponding support rings 225. As shown, the end of the set screw 227 abuts against the magnetic field generating device 221, and the set screw 227 can be tightened to fix the magnetic field generating device 221 at a predetermined position, and the set screw 227 can be loosened by adjusting the tightening screw 227. The magnetic field generating device 221 is in a circumferential position on the support ring, so that the circumferential position adjustment of the magnetic field generating device 221 at the annular support portion 22 can be achieved by the set screw 227 to accommodate the needs of different specifications of the printed product. As shown in FIG. 4, as a preferred embodiment, the support ring 225 is provided with the annular groove 2251 on both sides thereof, and the two annular grooves 2251 form a shoulder 2252 between the two magnetic field generating devices. 221 is evenly disposed in each of the annular grooves 2251, and the first adsorption holes 222 are disposed on the annular grooves 2251 and the shoulders 2252.

Further, as shown in FIG. 3, the inner wall of the annular support portion 22 is provided with a recess 228 in the axial direction. The recess 228 corresponds to the through hole 2121 of the drum body 212, and each of the first adsorption holes 222 is connected to the recess 228. By providing the recess 228, it can be ensured at the annular support portion 22 When moving in the axial direction, the first adsorption hole 222 is always in a through state with the through hole 2121 of the drum body 212.

 As shown in FIG. 3b and FIG. 4, in another feasible embodiment, the pressing plate 226 may be provided with a fitting groove that is engaged with the connecting key 2124, and the connecting bolt 28 passes through the pressing plate 226 and the The connecting keys 2124 are connected to fix the pressure plate 226 on the side of the support ring 225, and the two flat end upper surfaces of the T-shaped connecting keys 2124 are abutted against the T-shaped keyways 2122, 2123 by tightening the connecting bolts 28, with the aid of The friction between the key 2124 and the keyway achieves axial fixation of the annular support portion 22. In this configuration, the axial adjustment of the annular support portion 22 is as described above, and will not be described herein.

 Further, referring to FIG. 3, FIG. 5 and FIG. 6, the magnetic field generating device 221 includes a magnetic block carrier 2211, a magnetic element 2212 and a bottom plate 213. The magnetic element 2212 is received in the magnetic block carrier 2211, and the bottom plate 2213 can The magnetic element 2212 is enclosed in the magnetic block carrier 2211, and the magnetic block carrier 2211 and the bottom plate 2213 are fastened by screws. The magnetic block carrier 2211, the bottom plate 2213, and the cover plate 23 are each made of a weak magnetic material or a non-magnetic conductive material.

 In one possible solution, one end of the cover plate 23 is fixedly connected to the annular support portion 22, and the other end is adjustably fixed in the clamping portion 25, and the clamping portion 25 and the annular support portion 22 are They are connected and can be moved along their circumference to tension the cover plate 23.

 Further, as shown in FIG. 3 and FIG. 3a, the clamping portion 25 further includes a pair of upper and lower pressing plates 251 and 252, and the other end of the cover plate 23 is fixed to the upper and lower pressing plates 251 and 252. The upper and lower pressing plates are disposed in the long grooves formed at the end portions of the annular supporting portion 22, and the lower pressing plate of the clamping portion 25 is fixed to the annular supporting portion 22 by a fastening bolt 261. connection. When it is necessary to adjust the annular support portion 22 or other components, the tension of the cover plate 23 is relaxed by loosening the fastening bolt 261, or the cover plate 23 is disengaged from the upper and lower sides by unscrewing the positioning bolt 262. Clamping of the pressure plate. When the cover plate 23 needs to be tensioned, the lower platen 252 is pulled toward the end of the annular support portion 22 by adjusting the fastening bolt 261, thereby tightening the cover plate 23.

 Referring to FIGS. 7 and 12, the mandrel of the magnetic orientation roller is provided with a hollow gas passage 2111 in the axial direction. The gas passage 2111 is generally disposed coaxially with the mandrel 211, and is disposed on the mandrel 211. A plurality of air holes 2112 communicating with the gas passage 2111 are disposed on the side wall, and two ends of the outer core of the mandrel 211 are respectively provided with an annular shoulder 2113, and the annular shoulder 2113 and the inner wall of the drum body 212 are The gas chamber 213 is formed between the mandrels 211, and the gas in the gas chamber 213 can be sucked through the air holes 2112.

 In order to smoothly transfer the printed product adsorbed on the magnetic directional roller to the next roller to eliminate the print intersection error, it is feasible to further fix two lengths on the outside of the mandrel 211 along the length direction. The radially extending plenum partitions 271, 272, the two plenum partitions 271, 272 have two spaces in the circumferential hollow portion between the mandrel 211 and the drum body 212, wherein One space is a gas chamber 213, and in the space located in the gas chamber 213, the mandrel 211 is provided with a gas hole 2112 communicating with the gas passage 2111. The through hole 2121 in the drum body 212 of the magnetic orientation roller is preferably disposed in a section corresponding to the air chamber 213, because the first adsorption hole 222 of the annular support portion 22 and the through hole 2121 is connected to each other, and a second adsorption hole is evenly distributed on the cover plate 23. As can be seen from the above, during the relative rotation of the roller body 212 and the mandrel 211, the surface of the magnetic orientation roller 20 can be performed. Conversion of adsorption and non-adsorption functions.

 Referring to FIG. 7 and FIG. 12 together, in order to make the connection between the air chamber partitions 271 and 272 and the mandrel 211 more stable, it is preferable to respectively provide two groups in the radial direction on the opposite inner side surfaces of the two shoulders 2113. Corresponding grooves 2114, 2115, two of the plenum partitions 271, 272 are respectively embedded in the grooves 2114, 2115, and are fixedly connected to the mandrel 211 by screws, the drum body 212 The gas chamber 213 is formed between the two shoulders 2113 of the mandrel 11 and the two plenum partitions 271, 272.

Further, the shoulder 2113, each of the air chamber partitions 271, 272 and the drum body 212 form a clearance fit, that is, the outer diameter of the shoulder 2113, each of the air chamber partitions The outer end faces of the plates 271, 272 are slightly smaller than the inner wall radius of the drum body 212, so that the drum body 212 can freely rotate on the mandrel 211 without frictional interference with the air chamber partition. . In order to achieve the above object, after the air chamber partition is fixed to the mandrel 211, each of the air chamber partitions 271, 272 is preferably disposed such that the outer end surface thereof and the inner wall surface of the drum body 212 have a gap of 0. a gap of lmm to 4 mm, an outer peripheral surface of the shoulder 2113 and the drum body Between the inner wall surfaces of the 212, there is also a gap of 0.1 to 4.

 As shown in Fig. 3, the two air chamber partitions 271 272 divide the rotary air gap 21 into a space having an adsorption function (air chamber 213) and no adsorption function. In the A section, since the air hole 2112 is not provided in the mandrel 211, the A section forms a space which does not have an adsorption function. On the other hand, in the region of the angle α (360 ° - Α), since the air hole 2112 is provided in the mandrel 211, a space having an adsorption function is formed in the interval, and the space is formed as the air chamber 213. That is, during the rotation of the drum body 212, when the through hole 2121 provided thereon enters the air chamber 213, the annular support portion 22 corresponding to the partial drum body 212 has an adsorption function, and when the drum body 212 rotates to When the through hole 2121 provided thereon enters the A section from the air chamber 213, the annular support portion 22 corresponding to the partial drum body 212 loses the adsorption function.

 The working principle of the magnetic directional drum 20 is that the mandrel 211 does not rotate, and the drum body 212 is driven to rotate by the driving system, for example, the drum body 212 can be driven to rotate by gear transmission. During the rotation of the drum body 212, when the through hole 2121 of the drum body 212 corresponds to the A section between the two air chamber partitions 271 272, since the core shaft 211 does not have the air hole 2112 in the section, the The magnetic orientation roller 20 does not have an adsorption function; when the roller body 212 is rotated to the through hole 2121 provided thereon into the air chamber 213 between the two air chamber partitions 271 272 (ie, 360 ° -A interval), the cover 23 The upper second adsorption hole, the first adsorption hole 222 of the annular support portion 22, and the through hole 2121 of the roller body 212 are sequentially connected, and the air suction device passes through the gas passage 2111 of the mandrel, the air hole 2112, and the air chamber 213 to the magnetic orientation roller. The surface of 20 is evacuated so that the surface of the magnetic orientation roller 20 has an adsorption function. When the roller body 212 of the rotary air width 1 has a circumferential surface of the through hole 2121 all entering the 360 ° - interval between the two air chamber partitions 271 272, the surface of the roller body 212 has the strongest adsorption force, that is, magnetic orientation. The drum 20 achieves maximum adsorption capacity. As the drum body 2121 rotates continuously, the magnetic directional drum 20 has an adsorption function and two states that do not have an adsorption function alternate with each other. The magnetic directional roller rotates the air wide structure to ensure the stability of the print delivery, and at the same time reduces the unstable factors such as the sheet flow during the magnetization of the print, and improves the quality of the magnetic orientation of the print pattern.

 Further, in the magnetic directional roller, when it is necessary to perform positional adjustment in the axial direction and the circumferential direction of the magnetic field generating device 221 facing the annular support portion 22 according to the plate of the printed product, on the one hand, since each of the annular support portions 22 is spaced apart The distance L is defined (see FIG. 2), and the annular support portion 22 is fixedly coupled to the drum body by the frictional force generated between the connecting key 2124 and the key groove. Therefore, the connecting bolt 28 connecting the annular support portion 22 and the connecting key is loosened, that is, The fixing of the connection key 2124 and the keyway 2122 2123 can be released, so that the connection key 2124 can be axially moved together with the annular support portion 22 in the key groove, thereby achieving axial adjustment of the magnetic field generating device 221, thereby achieving the adjustment of the magnetic field generating device 221. The purpose of the axial position. On the other hand, since the magnetic field generating device 221 is fixed in the annular groove 2251 of the annular support portion 22 by the pressing plate 226 and the set screw 227, the set screw can be loosened when the magnetic field generating device 221 needs to perform the circumferential position adjustment. 227 releases the end face of the magnetic field generating device 221, and moves the magnetic field generating device 221 in the annular groove 2251. When adjusted to an appropriate position, the set screw 227 is tightened to tighten the magnetic field generating device 221, which is convenient for the magnetic field. The generating device 221 performs adjustment of the circumferential position.

 Figure 9 is a schematic structural view of a dry transfer roller of the ink photocuring unit of the present invention; Figure 10 is a cross-sectional view taken along line D-D of Figure 9; Figure 11 is a mandrel of the dry transfer roller of the present invention Schematic diagram of the structure.

 As shown in FIG. 911, the dry paper transfer cylinder 30 includes: a drum body 31 and a mandrel 32. The drum body 31 is a hollow cylinder rotatably sleeved on the mandrel 32. The two ends are respectively provided with an annular shoulder 323, and the drum body 31 forms a gas chamber 33 with the two shoulders 323 of the mandrel 32. As shown in Fig. 9, in the present embodiment, the drum body 31 is supported on the spindle 32 via a bearing 341 342. The mandrel 32 is closed at the end, and the other end is an open end, that is, the mandrel 32 is provided with a hollow gas passage 321 in the axial direction, and the open end of the mandrel is connected to the air suction device, and is disposed through A plurality of air holes 322 communicating with the gas passage 321 on the mandrel 32 to extract gas in the gas chamber 33. The roller wall of the drum body 31 is provided with a cooling passage 311 connected to the cooling water circulation system and an adsorption air hole 312 which can be electrically connected to the air chamber 33.

Referring to FIG. 10, an optional solution is to arrange the cooling passage 311 in the axial direction of the roller wall of the drum body 31. In order It is possible to uniformly cool the entire sheet during the transfer, and it is preferable to uniformly distribute a plurality of the cooling passages 311 at intervals in the circumferential direction of the roller wall of the drum body 31, and a plurality of the cooling passages are connected in series to each other. One end of one of the cooling passages 311 is connected to a water inlet 38, and one end of the other cooling passage is connected to a water outlet (not shown).

 Another alternative is to have a plurality of radially disposed adsorption air holes 312 in the axial direction of the drum body 31. Referring to Figures 9 and 10, the adsorption air holes 312 are disposed in two adjacent two places. Between the cooling passages 311, the adsorption air holes 312 are evenly distributed in the longitudinal direction of the drum body 31, so that the sheets can be stably adsorbed on the dry paper transfer cylinder.

 The dry paper transfer roller of the invention can adsorb the printed sheet on the surface of the roller during the printing process of the single sheet or web, so that the printed sheet can maintain the smoothness during the transfer process, and the cooling passage 311 provided through the drum body can be The sheet is effectively cooled to effectively reduce the surface temperature of the sheet.

 In addition, in order to smoothly transfer the printed sheets adsorbed on the dry transfer roller to the next roller to eliminate the sheet intersection error, it is feasible to fix two protrusions in the radial direction of the mandrel 32. The air chamber partitions 361, 362, the two air chamber partitions 361, 362 divide the drum body 31 and the mandrel 32 into two spaces, one of which is a gas chamber 33, located at In the space of the gas chamber 33, the mandrel 32 is provided with a gas hole 322 communicating with the gas passage 321 . On the drum body 31, the adsorption air holes 312 are provided in a section corresponding to the air chamber 33. In the circumferential direction of the drum body 31, the adsorption air holes 312 are uniformly disposed in the range in which the gripper rows 5 are attached, and the angle α between the two air chamber partitions 361 and 362 is determined by the position where the sheets are transferred before and after the sheets. Therefore, during the rotation of the drum body 31, when the adsorption air hole 312 provided thereon enters the air chamber 33, the partial drum body 31 has the function of adsorbing the printed sheets, and when the drum body 31 is rotated to the adsorption air holes 312, the air chamber is separated from the air chamber. At 33 o'clock, the drum body 31 loses its adsorption function. The cooperation relationship between the air chamber partitions 361 and 362 and the core shaft 32 and the drum body 31 is the same as that of the magnetic orientation roller, and details are not described herein.

 Fig. 8 is a view showing the working state of a specific embodiment of the dry transfer cylinder. At this time, the gripper row 5 is located outside the air chamber 33, and the drum body 31 does not have an adsorption force on the paper thereon. The working principle of the dry transfer cylinder will be described in conjunction with a specific embodiment shown in FIG. Figure 8 illustrates a specific embodiment of a dry transfer cylinder for use in the joint printing apparatus of the present invention. The dry transfer roller 30 is disposed under the UV drying device 110, the third transfer roller 111 is disposed at one side of the dry transfer roller 30, and the fourth transfer roller 108 is disposed at the other of the dry transfer roller 30. On one side, the direction of rotation of each drum is as shown by the arrow in the figure. In the present embodiment, the sheet is conveyed by the third transfer cylinder 111 to the dry transfer cylinder 30, dried by the drying device 110, and then dried by the transfer cylinder. 30 is transferred to the fourth transfer cylinder 108 and sent out of the drying unit.

 The drying paper transfer roller 30 is composed of a drum body 31 and a core shaft 32. A plurality of radially disposed adsorption air holes 312 are uniformly distributed on the circumference of the drum body 31 in the axial direction. The mandrel 32 is axially A plurality of air holes 322 are evenly distributed on the circumference in the range of the predetermined central angle (angle α). Wherein, the adsorption pores 312 are evenly distributed throughout the outer roller body 31 (except for the position where the sheet stack 5 is mounted), and the angle at which the pores 322 are circumferentially distributed in the mandrel 2 is determined by the position of the sheet transfer. In order to stably hold the sheet in the drying process on the surface of the drum body 31, and during the transfer with the third and fourth transfer cylinders 111, 108, the sheet can be smoothly conveyed, and the drum body 31 is reduced. Adsorption force, two air chamber partitions 361, 362 are fixed on the mandrel 32, and the air holes 322 are disposed in the range of the angle α between the two air chamber partitions 361, 362, usually the angle α is less than 360 degrees. More than or equal to 180 degrees. The space between the drum body 31 and the mandrel 32 is divided into two by the two-chamber partition plates 361 and 362, and is divided into a space having an adsorption function (air chamber 33) and having no adsorption function, as shown in FIG. The Α interval is a space that does not have an adsorption function, and the angle α (360 ° - Α) is a space having an adsorption function, and the space is formed as a gas chamber 33. Further, the mandrel 32 and the drum body 31 are supported and connected to each other by bearings 341 and 342 provided outside the shoulder 323, and the roller body 31 is rotated on the mandrel 32 by the gear 37.

 Further, a gripper row 5 can be provided on both the magnetic orientation roller 20 and the dry transfer roller 30 to ensure smooth transfer and accurate transfer of the printed sheets during magnetic orientation or drying.

The working principle of the joint printing device of the present invention is: the printing sheet passes through the paper feeding portion 118, the paper feed roller 117, the first paper transfer roller 116, and the printing The brush portion and the delivery portion 101 can complete the printing process of the screen printing, the magnetic orientation of the ink magnetic substrate, and the letterpress printing by one printing, and complete the process from paper feeding to printing to delivery. The invention is applicable to, but not limited to, secure printing of security documents and securities.

 Specifically, the printed sheet provided by the paper feeding portion 118 enters the screen printing unit 4 through the paper feed roller 117 and the first paper transfer roller 116, and is combined with the screen printing cylinder 115 by the screen printing cylinder 114 to realize the printing sheet. Screen printing. The sheet after the screen printing is completed is passed from the second transfer cylinder 113 into the ink magnetic sheet-based magnetic field directing unit, and when the sheet passes through the magnetic orientation roller 20, the magnetic substrate in the ink is magnetically oriented. The printed sheet then enters the first ink photocuring unit 3 by the third transfer cylinder 111. When the printed sheet passes through the dried transfer cylinder 30, the photocurable ink on the printed sheet is disposed on the side of the dry transfer cylinder 30. It is cured by the action of 110. The dried sheet is conveyed by the fourth transfer cylinder 108 to the letterpress impression cylinder 106 into the letterpress printing unit 1, i.e., when the sheet passes the letterpress impression cylinder 106, the relief cylinder 103 and the relief impression cylinder 106 collectively apply the stamp. Press to complete the letterpress printing on the sheet. The proof-finishing proof sheet is further introduced into the second ink photocuring unit 3 by the fifth transfer cylinder 109. When the sheet passes through the dry transfer cylinder 30, the photocurable ink on the sheet is disposed on the side of the dry transfer cylinder 30. The UV drying device 110 is again cured by the action. Finally, the paper discharge roller 107 enters the delivery section 101.

 In the invention, since the printing sheet is input once in one printing device, the continuous printing operation can be completed through continuous screen printing, magnetic orientation of the printing product, and letterpress printing, and the finished finished product is sent to the delivery section, so Compared with the prior art, the invention can greatly shorten the production cycle, reduce equipment investment, save production and warehouse space occupation, and reduce manual investment.

 In addition, the magnetic directional roller and the dry paper transfer roller of the present invention all adopt a rotary air width, and can smoothly adsorb the printed matter during magnetic orientation treatment or drying process on the magnetic film base in the ink on the surface of the printed product. On the surface of the magnetic orientation roller or the dry transfer roller, and when the magnetic orientation roller or the dry transfer roller is rotated until the print is to be transferred to the third transfer cylinder 111 or the fourth transfer cylinder 108 for handover , so that the print in the intersection area is no longer adsorbed by the magnetic orientation roller or the dry transfer cylinder, that is, in the intersection area, the surface of the drum body having the print is in the A section shown in FIG. The section cylinder body loses the adsorption function, thus eliminating the sheet intersection error existing in the prior art.

 The above description is only illustrative of the specific embodiments of the invention and is not intended to limit the scope of the invention. Any equivalent changes and modifications made by those skilled in the art without departing from the spirit and scope of the invention shall fall within the scope of the invention. In addition, it should be noted that the components of the present invention are not limited to the above-mentioned overall application, but may be combined with other prior art according to actual needs. Therefore, the present invention naturally covers other combinations related to the present invention and application.

Claims

claims 1. A combined printing device, characterized in that the combined printing device includes: at least one set of ink photocuring units and a screen printing unit, an ink magnetic base magnetic orientation unit, and a relief printing unit arranged in sequence, each The units are connected through a paper transfer system. 2. The combined printing device according to claim 1, wherein the screen printing unit has a screen impression cylinder, and at least one set of screen cylinders in contact with the screen impression cylinder; The relief printing unit has a relief impression cylinder, and at least one set of relief cylinders in contact with the relief impression cylinder; the ink photocuring unit has a UV drying and/or infrared drying device that can cool and absorb the drying of printed sheets. Transfer roller. 3. The combined printing device according to claim 1, wherein a second paper transfer roller is provided between the screen printing unit and the ink magnetic base magnetic orientation unit, and the ink magnetic base magnetic orientation unit A third paper transfer roller is provided between the ink photocuring unit and the relief printing unit. A paper transfer roller or a chain paper transfer mechanism is provided between the ink photocuring unit and the relief printing unit. 4. The combined printing device according to claim 3, wherein the second paper transfer roller and the third paper transfer roller are air cushion rollers. 5. The combined printing device according to claim 1, wherein the ink photocuring unit has UV drying and/or infrared drying, and a drying paper transfer roller that can cool and absorb printed sheets; the drying paper transfer roller It is a rotating air chamber, including: a drum body and a mandrel, wherein the drum body is rotatably sleeved on the mandrel, and an air chamber is formed between the drum body and the mandrel; the mandrel and the pump are The gas device is connected to the air device and can suck the gas in the air chamber; the roller wall of the drum body is provided with a cooling channel connected to the cooling water pipe, and an adsorption pore that can be communicated with the air chamber. 6. The combined printing device according to claim 5, characterized in that the cooling channel is provided in the cylinder wall of the cylinder body along the axial direction. 7. The combined printing device according to claim 6, wherein a plurality of the cooling channels are evenly distributed in the circumferential direction of the cylinder wall of the cylinder body, and the plurality of cooling channels are connected in series to each other. . 8. The combined printing device according to claim 5 or 6, characterized in that the roller body has a plurality of radially arranged adsorption pores. 9. The combined printing device according to claim 8, wherein the cooling channel is axially disposed in the cylinder wall of the cylinder body and is evenly distributed in the circumferential direction of the cylinder wall of the cylinder body. There are multiple; the adsorption pores are arranged between two adjacent cooling channels and are evenly distributed in the length direction of the drum body. 10. The joint printing device according to claim 1, characterized in that the magnetic orientation unit of the ink magnetic sheet base is a magnetic orientation roller, and the magnetic orientation roller includes: Rotating air chamber, the rotating air chamber has a core shaft, and a drum body is rotatably sleeved on the outside of the core shaft. An air chamber is formed between the drum body and the core shaft; the core shaft is connected to the air extraction device. connection, and can suck the gas in the air chamber; the cylinder wall of the drum body is provided with a through hole that can communicate with the air chamber; An annular support part, a plurality of the annular support parts are arranged outside the drum body along the axial direction, a plurality of magnetic field generating devices are embedded in the outer circumference of each annular support part, and are connected with the through hole. The first adsorption hole; A cover plate with a plurality of second adsorption holes evenly distributed on it, and the cover plate covers the outside of the plurality of annular support parts. 11. The combined printing device according to claim 10, wherein a plurality of the through holes are provided on the roller body along the axial direction. 12. The combined printing device according to claim 10, characterized in that two key grooves are provided along the axial direction on the outer circumference of the roller body, and a plurality of key grooves equal to the number of the annular supporting parts are provided therein. A connecting key with a corresponding width, connecting the annular support part and the connecting key through a connecting bolt, fixing the axial and circumferential position of the annular support part on the outer circumference of the drum, and the shaft Position adjustment. 13. The joint printing device according to claim 12, wherein the keyway is a T-shaped groove, and the inner peripheral wall of the annular support portion is provided with two rectangular recesses at positions corresponding to the T-shaped groove. groove, the connecting key is a T-shaped key that matches the T-shaped groove, and one end of the T-shaped key is embedded in the rectangular groove of the annular support part to circumferentially limit the annular support part. , through the action of connecting bolts to axially position or adjust the axial position of the annular support part. 14. The combined printing device according to claim 12 or 13, wherein the annular support part includes a support ring, and a pressure plate is provided on the side of the support ring; wherein, the side of the support ring is provided with an annular The magnetic field generating device is arranged in the annular groove, and each magnetic field generating device is fixed on the support ring through the pressure plate and a plurality of set screws. 15. The combined printing device according to claim 14, wherein the annular grooves are provided on both sides of the support ring, a shoulder is formed between the two annular grooves, and a plurality of the magnetic fields The generating devices are evenly distributed in the annular groove, and the first adsorption holes are provided on both the annular groove and the shoulder. 16. The joint printing device according to claim 10, wherein the magnetic field generating device includes a magnetic block carrier, a magnetic element accommodated in the magnetic block carrier, and the magnetic element is enclosed in the magnetic block carrier. The base plate inside the block carrier. 17. The combined printing device according to claim 10, wherein one end of the cover plate is fixedly connected to the annular support part, and the other end is adjustably fixed in the clamping part, and the clamping part is connected to the annular support part. The annular support part is connected and can move along its circumferential direction to tighten the cover plate. 18. The combined printing device according to claim 17, wherein the clamping part has a pair of upper and lower pressure plates, and the other end of the cover plate is fixed between the upper and lower pressure plates. Fastening bolts connect the annular support part and the clamping part, and the cover plate is tightened by adjusting the fastening bolts. 19. The joint printing device according to any one of claims 16 to 18, characterized in that the magnetic block carrier, bottom plate and cover plate are all made of weak magnetic materials or non-magnetic conductive materials. 20. The joint printing device according to claim 5 or 10, characterized in that the dry paper transfer roller and the magnetic orientation roller are both equipped with gripper rows for handover and transfer of printed sheets. 21. The combined printing device according to any one of claims 5 to 13, wherein the mandrel is provided with a hollow gas channel along the axial direction, and a plurality of gas channels are provided on the side walls of the mandrel. The gas channels are connected with air holes, and the two ends of the mandrel are respectively provided with annular shoulders. The air chamber is formed between the annular shoulders, the inner wall of the drum and the mandrel, and suction can be achieved through the air holes. The gas in the gas chamber. 22. The combined printing device according to claim 21, characterized in that, two air chamber partitions protruding in the radial direction are fixed along the length direction outside the mandrel, and the two air chamber partitions The circumferential hollow portion between the drum body and the mandrel is divided into two spaces, one of which is an air chamber, and the air hole is provided on the mandrel located in the air chamber space. 23. The combined printing device as claimed in claim 22, characterized in that two sets of corresponding grooves are provided on the inner surfaces facing each other of the two convex shoulders in the radial direction, and the two air chamber partitions are respectively It is embedded in the groove and fixedly connected with the mandrel. The air chamber is formed between the roller body, the two shoulders of the mandrel and the two air chamber partitions. 24. The combined printing device according to claim 23, wherein the adsorption air holes or through-holes are provided on the roller body in a section corresponding to the air chamber; During the relative rotation of the mandrel, the surface of the dry paper transfer roller or the magnetic orientation roller can switch between adsorption and non-adsorption functions. 25. The combined printing device according to claim 22, wherein a clearance fit is formed between the shoulder, each of the air chamber partitions and the roller body. 26. The combined printing device according to claim 25, wherein there is a gap of 0.1 mm between the outer peripheral surface of the shoulder, the outer end surface of each air chamber partition and the inner wall surface of the roller body. to 4mm gap. 27. The combined printing device according to claim 5 or 10, characterized in that bearings are provided at both ends of the mandrel. Bearing, the roller body and the mandrel are rotatably connected. 28. The combined printing device according to claim 1, wherein the ink photocuring unit is arranged before or after the relief printing unit. 29. The joint printing device according to claim 28, characterized in that a paper transfer roller or a chain paper transfer mechanism is provided between the ink photocuring unit and the letterpress printing unit. 30. The combined printing device according to claim 1, wherein the ink photocuring unit is provided before and after the relief printing unit. 31. The combined printing device according to claim 30, wherein the ink photocuring unit and the letterpress printing unit are connected by a fourth paper transfer roller and a fifth paper transfer roller or by a chain paper transfer mechanism. connected.