EP3826852B1 - Vorrichtungen zum ausrichten von magnetischen oder magnetisierbaren partikeln sowie maschine zur erzeugung optisch variabler bildelemente - Google Patents

Vorrichtungen zum ausrichten von magnetischen oder magnetisierbaren partikeln sowie maschine zur erzeugung optisch variabler bildelemente Download PDF

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Publication number
EP3826852B1
EP3826852B1 EP19725147.3A EP19725147A EP3826852B1 EP 3826852 B1 EP3826852 B1 EP 3826852B1 EP 19725147 A EP19725147 A EP 19725147A EP 3826852 B1 EP3826852 B1 EP 3826852B1
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EP
European Patent Office
Prior art keywords
cylinder
magnetic
frame
substrate
transducer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP19725147.3A
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German (de)
English (en)
French (fr)
Other versions
EP3826852A1 (de
Inventor
Andreas Jantsch
Edwin Kreps
Michael Scheller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koenig and Bauer AG
Original Assignee
Koenig and Bauer AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE102018212427.2A external-priority patent/DE102018212427A1/de
Priority claimed from DE102018212429.9A external-priority patent/DE102018212429B4/de
Application filed by Koenig and Bauer AG filed Critical Koenig and Bauer AG
Publication of EP3826852A1 publication Critical patent/EP3826852A1/de
Application granted granted Critical
Publication of EP3826852B1 publication Critical patent/EP3826852B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/005—Attaching and registering printing formes to supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F19/00—Apparatus or machines for carrying out printing operations combined with other operations
    • B41F19/002—Apparatus or machines for carrying out printing operations combined with other operations with means for applying specific material other than ink
    • B41F19/005—Apparatus or machines for carrying out printing operations combined with other operations with means for applying specific material other than ink with means for applying metallic, conductive or chargeable material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F11/00—Rotary presses or machines having forme cylinders carrying a plurality of printing surfaces, or for performing letterpress, lithographic, or intaglio processes selectively or in combination
    • B41F11/02—Rotary presses or machines having forme cylinders carrying a plurality of printing surfaces, or for performing letterpress, lithographic, or intaglio processes selectively or in combination for securities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/10—Forme cylinders
    • B41F13/12—Registering devices
    • B41F13/16—Registering devices with means for displacing the printing formes on the cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/0403—Drying webs
    • B41F23/0406—Drying webs by radiation
    • B41F23/0409—Ultraviolet dryers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/044—Drying sheets, e.g. between two printing stations
    • B41F23/045—Drying sheets, e.g. between two printing stations by radiation
    • B41F23/0453—Drying sheets, e.g. between two printing stations by radiation by ultraviolet dryers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2213/00—Arrangements for actuating or driving printing presses; Auxiliary devices or processes
    • B41P2213/90—Register control
    • B41P2213/91—Register control for sheet printing presses

Definitions

  • the invention relates to a device for aligning magnetic or magnetizable particles and a machine for generating optically variable picture elements according to claim 1 or 14.
  • a printing machine with a screen printing unit and a device for aligning magnetic or magnetisable particles contained in the printing ink or the paint is known, the device having a cylinder with a plurality of elements that cause a magnetic field on the circumference and a dryer directed at a point in the transport path, at which the substrate has not yet left the cylinder.
  • WO 2016/026896 A1 discloses a magnetically operative device comprising a rotatable magnet and a magnetic cylinder comprising one or more such peripherally rotatable magnet devices for aligning magnetic particles of a coating composition printed on a substrate.
  • Such a magnetic cylinder is preferably part of a rotary printing machine, with the coating agent being applied by an intaglio, gravure, flexographic or, preferably, by a screen printing method.
  • the U.S. 2011/0168088 A1 also discloses a device for aligning magnetic or magnetizable particles of an ink by a rotating magnet, the magnets being rotatable by the rotation of the cylinder via a gear.
  • the EP 2 885 131 A1 discloses a method for arranging at least two printing plates in register and a system for register control, wherein in a preferred embodiment at least one transmitting unit and a receiving unit connected or connectable to it wirelessly are arranged, by means of which electrical control signals and/or measurement signals and/or electrical power via electromagnetic Signals and/or fields are or can be transmitted between the rotating and/or rotatable plate cylinder on the one hand and a stationary machine component, for example the frame of the printing unit and in particular the machine control system, on the other hand.
  • DE 41 29 373 A1 discloses a device for the contactless transmission of electrical energy and data from a stationary machine component to a rotating machine component of a printing press, in particular to a plate cylinder for the oblique adjustment of a printing plate.
  • DE 36 14 006 A1 is a sheet-fed offset printing press with a cylinder, in which an energy converter with a generator for obtaining electrical energy is disclosed, which is used, for example, to drive electromotive actuators.
  • WO 2010/052063 A1 discloses a processing machine with interchangeable tools, a rotary transmitter for electrical energy having a machine-fixed stator and a spindle-fixed rotor being provided.
  • the DE 10 2015 214 095 A1 relates to a transmission device, in particular for a machine tool. There, contactless energy is transmitted to the rotating part and data is exchanged bidirectionally between the stationary and the rotating part.
  • the WO 2016/067247 A1 relates to a printing machine with a magnetic cylinder comprising magnetic elements on the circumference, which cylinder can be removed as a whole from the magnetizing device.
  • the object of the invention is to provide devices for aligning magnetic or magnetizable particles and a machine for generating optically variable picture elements.
  • a number of revolutions for the time of interaction with the magnetic element can be optimized and/or operation with and without rotation can be carried out.
  • a device for aligning magnetic or magnetizable particles contained in a coating agent applied to one side of a web or sheet-shaped substrate comprises a magnetic cylinder which is arranged in the transport path of the substrate to be conveyed and has a plurality of magnetic fields in the area of its outer circumference effecting devices, magnetic devices for short, having some or all of the magnetic devices each comprising a rotatable by an associated motor magnet, and the magnetic cylinder is rotatably arranged in frame walls of a frame.
  • a non-contact coupling via a transmitter for the non-contact transmission of electrical energy and/or control signals from the outside into or on the rotating magnetic cylinder which includes a frame-fixed transmitter part and a transmitter part that is fixed in operation during operation, e.g. B. a low-wear supply and / or transmission of control signals.
  • the non-contact coupler based on a bus-supported data transfer, there is also a high data rate and/or a data rate that can be expanded at any time Parameter transfer achievable. Since the electrical power is also provided by the same transformer, a space-saving and effective solution is created. Particularly preferred is an embodiment in which several or all of the one
  • electrical power and/or signals are preferably transmitted to the magnetic device in such a way that an electrical line connection between line branches routed in the magnetic cylinder and the motor and/or the motor controller or the control logic controlling the motor is maintained even if there is a significant displacement of the magnetic device is maintained in the circumferential direction.
  • contact can be produced continuously in the circumferential direction on at least one circumferential section between the magnet device, which can be continuously adjusted in the circumferential direction over at least one circumferential section, and the cylinder-fixed contact elements, so that variable positioning of the rotatable magnets is possible.
  • z. B a continuously existing contact with a significant relative movement in the circumferential direction over z. B. at least 10 mm, advantageously at least 50 mm, guaranteed. This is preferably done by a contact in the form of sliding contacts, in particular a slip ring.
  • electrical connection elements can be provided on several or all of the magnetic devices to be operated, which can be brought into electrical line contact with the ends of line branches transmitting the electrical power and/or electrical control signals, and via which electrical power and/or control signals are transmitted to the magnetic device in question can be supplied or are.
  • a machine 01 e.g. B. printing machine 01, in particular security printing machine 01, for generating optically variable image elements 03 on a substrate 02, z. g. a web or sheet of printing material 02, comprises an application device 04, e.g. B. a printing unit 04, through which optically variable coating means 06, z. B. optically variable printing ink 06 or paint 06, at least one application point, z. B. pressure point, on at least a first side of the substrate 02, z. g.
  • an application device 04 e.g. B. a printing unit 04, through which optically variable coating means 06, z. B. optically variable printing ink 06 or paint 06, at least one application point, z. B. pressure point, on at least a first side of the substrate 02, z. g.
  • the printing material 02 can be applied over the entire surface or in partial areas in the form of printing elements 08, as well as a device 07 for aligning the particles contained in the optically variable coating material 06 applied to the substrate 02 and responsible for the optical variability (see, e.g. 1 ).
  • This device 07 is also referred to below as the alignment device 07 for short.
  • the printing elements 08 made of variable coating material 06 applied to the substrate 02 by the application device 04 prior to treatment by the alignment device 07 can correspond in size and position to the optically variable image elements 03 to be generated (see, e.g. 2 and 3 ) or, if necessary, also be larger than this, if necessary even several panels 09 extend over the surface. In the case of larger printing elements 08, for example, an optically variable image element 03 is not generated by alignment over the entire surface coated with optically variable coating medium 06.
  • the particles responsible for the optical variability are here in the coating agent 06, e.g. B. the printing ink 06 or the paint 06, magnetic or magnetizable, non-spherical particles, z. B. pigment particles, hereinafter referred to as magnetic flakes.
  • the machine 01 is preferably used to produce panels 09, e.g. B. securities 09, in particular banknotes 09, or intermediate products of such securities 09, e.g. B. Printed images of several such securities 09 containing printing material sections.
  • the substrate 02 e.g. B. substrate 02, can by - z. B. cellulose- or preferably cotton-fiber-based paper, be formed by plastic polymer or by a hybrid product thereof.
  • it Before being coated in the above-mentioned application device 04, it can be uncoated or it can already have been coated, it can be unprinted or it can already be printed once or several times or have been mechanically processed in some other way.
  • a plurality of blanks 09 e.g. B.
  • banknotes 09 to be produced arranged in a row next to each other and several such rows of blanks 09 or their printed image one behind the other in the transport direction T or to be arranged in the course of the processing of the substrate 02 (see e.g. 2 and 3 ).
  • the machine 01 embodied as a printing press 01 can, in principle, comprise one or more printing units 04 with one or more printing units of any printing process. In a preferred embodiment, however, it comprises a printing unit 04 with at least one printing unit 11 that works according to the flexographic printing method or preferably according to the screen printing method; 12, through which the optically variable coating medium 06 is or can be applied to a first side of the printing material 02.
  • a greater layer thickness can be applied compared to other printing methods.
  • the expression “first side” of the substrate 02 or printing material 02 is chosen arbitrarily and is intended to designate that side of the printing material 02 on which the optically variable coating medium 06 is or was or can be applied.
  • the printing press 01 comprises a printing substrate template 13, e.g. B. a roll unwinder 13 or preferably a sheet feeder 13, from which the z. B. web or preferably arc-shaped Printing material 02 - possibly via further printing or processing units - of the printing unit 04 applying the optically variable coating medium 06, e.g. B. flexographic or in particular screen printing unit 04, with at least one printing unit 11; 12, e.g. B. flexo or especially screen printing unit 11; 12, is or can be supplied.
  • two screen printing units 11; 12 are provided, which are preferably combined in the same printing unit 04 and between a respective forme cylinder 14; 16, e.g. B.
  • a screen printing cylinder 14; 16, and a common impression cylinder 17 form two printing points for the same side, here the first side, of the printing material 02 (see e.g. 4 ).
  • coating agent 06 can also be applied in thicker layers.
  • a drying and/or curing device 18, e.g. B. a UV dryer 18 may be provided in the transport path between the two printing points. It can with only one or both of the screen printing units 11; 12 optically variable coating agent 06 can be applied or applied.
  • the printing unit 11; 12 as an imaging cylinder, a forme cylinder 14; 16 with a large number of, in particular similar and/or the same, image-forming print subjects or, in particular similar and/or the same, groups of image-forming print subjects on the circumference, which on a circumferential length corresponding to the print image length in a plurality of columns spaced equidistantly from one another transversely to the transport direction and on a cylinder width corresponding to the width of the printed image are arranged in a plurality of lines spaced equidistantly from one another in the transport direction.
  • a printing unit 11; 12 in the form of high-pressure reliefs and, in the preferred case, a printing unit 11 working according to screen printing; 12 in the form of stencils.
  • the printing unit 04 that applies the optically variable coating medium 06 is the Printing substrate 02 can be fed to alignment device 07 via conveying means of a first conveying device 19.
  • this can be one or more positively driven or non-driven rollers, via which the printing material 02 can be guided or is guided on the input side into the alignment device 07.
  • sheet-type printing material 02 ie individual sheets of printing material 02 passing through machine 01, sheet-conveying means are provided as conveying means.
  • these sheet-conveying means can be formed by one or more transfer cylinders or drums, which transfer the printing material sheet 02 from the printing unit 04, e.g. B. from the impression cylinder 17, and if necessary, via one or more additional transfer cylinders or drums on the input side to the alignment device 07.
  • the first conveyor device 19 is preferably designed as a rotary gripper conveyor 19, e.g. B. as a so-called. B. endless chains 21, which carry transverse to the direction of transport T gripper bars 22. Leading sheet ends can be gripped by the gripper bars 22, the printing material sheets 02 can thus be transported along the conveying path and can be delivered to the corresponding conveying or receiving means at the destination.
  • a chain wheel 23 is preferably located at least in the transfer area of the printing material sheet 02 from the printing unit 04 and in the area in which it is delivered to the alignment device 07; 24, also chain gripper wheel 23; 24 called.
  • the printing material 02 is conveyed to another, e.g. g. second conveyor device 26 of a product receptacle 27 for receiving the printing substrate 02 processed and/or machined in the machine 01, e.g. B. a rewinder 27 in the case of web-type printing material 02 or a stack delivery 27 in the preferred case of sheet-type printing material 02.
  • this can again be one or a plurality of positively driven or non-driven rollers, which continue the transport path of the first conveyor system 19 through the alignment device 07 and via which the printing substrate 02 can be guided or is guided on the input side into the rewinder 27.
  • sheet-conveying means are provided as conveying means.
  • the second conveyor 26 can be formed by one or more transfer cylinders or drums, which take the printing material sheet 02 from the aligning device 07 and deliver it downstream to the stack delivery device 27.
  • the second conveyor 26 like the first, is designed as a rotary gripper conveyor 26, e.g. B. chain gripper system 26 with revolving endless traction means 28, z. B. endless chains 28, one or more chain wheels 31 or chain gripper wheels 31 and gripper bars 29, through which the printing substrate sheets 02 are taken from the transport path section of the alignment device 07 and z. B. the pile delivery 27 (see e.g. 1 ).
  • an additional drying device with one or more dryers 32 e.g. B. radiation dryers 32 may be provided on the transport path leading away from the aligning device 07.
  • a cooling device is provided on the transport path between aligning device 07 and stack delivery 27, in particular behind the additional drying device in the transport path between aligning device 07 and product receptacle 27.
  • This can be embodied, for example, as a cooling roller, which is positioned between the second conveyor device 26 coming from the aligning device 07 and a third, e.g. B. also as a gripper circulating conveyor, z. B. chain gripper system running conveyor is arranged.
  • an inspection device not shown, e.g. B. a surface or line camera, provided and directed, for example, to a lateral surface segment lying in the transport path as a cooling roller or otherwise designed roller be.
  • the aligning device 07 set out in detail below is basically arbitrary in terms of its designs, design variants or configurations, but is preferably provided or can be provided in a machine 01 or printing press 01 as described above. In an advantageous embodiment, it is designed in the form of a module and can be inserted into the transport path of the machine 01 to be equipped with inlet and outlet-side interfaces to the open section ends of a conveyor system that continues upstream and downstream.
  • the device 07 for aligning optically variable picture elements 03, e.g. B. to form the optically variable effect in the previously - z. in the form of printing elements 08 - optically variable coating means 06 applied to the substrate 02, in particular printing substrate 02 comprises a defined transport path, along which the substrate 02 to be conveyed by the alignment device 07 moves from an input area in which the material to be treated and onto substrate 02 having optically variable coating medium 06 is fed or can be fed to its first side, is guided or conveyed in a defined manner via at least one magnetically active cylinder 33, magnetic cylinder 33 for short, into an exit region.
  • the first side having the optically variable coating medium 06 is to be understood in particular as the side on which the optically variable coating medium 06 can be applied or is or has been applied by the application device 04, for example upstream in the transport path.
  • two such cylinders 33 can also be provided, which are arranged on the same side or on different sides of a substrate 02 to be conveyed along the transport path.
  • the first or only magnetic cylinder 33 is arranged in the transport path of the substrate 02 to be conveyed, preferably on its second side, so that its first, in particular upstream, inline with the optical side coated with variable coating medium 06 points outwards during transport over the first or only magnetic cylinder 33.
  • the magnetic cylinder 33 has a plurality of devices 34 that produce a magnetic field, also referred to below as magnetic devices 34 for short, each of which comprises at least one magnetic element 44 and, through this, an orientation of at least some of the magnetic or magnetizable particles of the particles passing on the printing material 02 applied to the coating medium 06.
  • Device 34 or magnetic device 34 that causes a magnetic field should be understood here to mean generally magnetically active devices that are permanently or switchably switched on at least towards the side of the transport path (in particular for aligning particles contained in coating medium 06 on substrate 02, which is guided over it as described here strong) magnetic field.
  • the magnetic elements 44 can be formed by permanent magnets with or without engraving, by electromagnets or by combinations of a plurality of permanent magnets and/or one or more electromagnets. Irrespective of whether it is an individual magnet or a combination of a plurality of permanent and/or electromagnets, these magnet arrangements which are assigned to a magnet device 34 and are effective for alignment are collectively referred to as magnets 44 in the following. All or at least some of the magnets 44 are rotatably arranged on the cylinder 33 ready for operation.
  • the unequipped cylinder is also referred to here as a cylinder body, which can be equipped with magnetic devices 34 and acts as a magnetic cylinder 33 .
  • the magnet devices 34 comprise a magnet 44 which can be rotated about an axis R.
  • the magnet 44 is in particular positively driven in rotation by a motor.
  • a motor 46 included in the magnetic devices 34 in particular as an electric motor 46 , can be integrated in the structure of the relevant magnetic device 34 but included as a separate component of this magnetic device 34 .
  • the motor 46 can be designed as a stepper motor or as a motor 46 that can be controlled with respect to its speed and/or angular position with a speed and/or angular position transmitter that is internal to the motor or coupled to the load.
  • the axis R in particular the axis of rotation R for the rotation of the magnet 44, preferably runs perpendicularly to the cylinder envelope surface, i. H. perpendicular to the cylinder axis and intersecting the latter. However, at least it runs in a cone with a maximum cone angle of 15° around this perpendicular to and through the cylinder axis.
  • the magnetic device 34 is preferably arranged or can be arranged detachably on the cylinder 33 in such a way that, in the assembled state, it can be arranged at a defined location on the circumference of the cylinder 33 and can preferably be completely removed from the cylinder 33 and/or on the circumference of the cylinder 33 in axial and/or or circumferential direction can be positioned.
  • the magnetic device 34 comprises a one-part or multi-part support 47 that accommodates the magnet 44 and the motor 46, for example a one-part or multi-part frame 47 or housing 47, which preferably has at least one connecting element 94 assigned to the relevant magnetic device 34 for detachable and/or positionable arrangement of the magnetic device 34 on the magnetic cylinder 33 includes.
  • the carrier 47—and thus the magnetic device 34— is designed in several parts and includes a carrying element 47.1, e.g. B. a base 47.1 or an outwardly open receptacle 47.1, on which or in which a magnet 44 and the motor 46 comprehensive part 43 of the magnet device 34, z. B.
  • magnet unit 43 can be fastened or is fastened (see e.g. 14, 15 or 16 ).
  • the magnet unit 43 can have its own housing 47.2.
  • the support element 47.1 preferably has connection elements for supplying the electrical power and/or the signals and/or the at least one connecting element 94, which can be detachably arranged on the cylinder 33 in such a way that, in the assembled state, it is at a defined location on the circumference of the Cylinder 33 is arranged and, for example, completely removable from the cylinder 33 and/or can be positioned on the circumference of the cylinder 33 in the axial and/or circumferential direction.
  • the support element 47.1 can then, for example, already be fitted with the magnet unit 43, can be positioned on the circumference or can be positioned on the circumference and then fitted with the magnet unit 43.
  • any type of pairing of connecting elements 94; 96 may be provided.
  • a frictional or clamping connection 94, 96 is preferably provided between the respective magnetic device 34 and the cylinder 33, which enables continuous positioning of the magnetic device 34 in the circumferential direction over at least a circumferential section of more than 10 mm, preferably more than 50 mm, in particular preferably continuously over at least half the cylinder circumference.
  • a connecting element 94, z. B a clamping element 94, in particular clamping block 94, may be formed, which passes through a groove from below, in particular on both sides, against a cylinder-fixed connecting element 96, z. B.
  • a support 96 in particular one support rib 96, can be drawn in (see e.g. 14, 15 or 16 ).
  • the pulling against the support 96 can, for example, via a screw connection, z. B. a screw 97 protruding through the inside of the magnetic device 34 through the bottom of the carrier 47, in particular the carrying element 47.1, and cooperating with a thread in the clamping element 94.
  • the connecting element 94 associated with the magnet device 34 can be provided on the housing 47 or frame 47 of an operationally indivisible magnet device 34 or on an above-mentioned detachable support element 47.1.
  • the magnet devices 34 can be in or on several, e.g. B. between four and seven, in particular between four and six, axially spaced from each other and preferably in the axial direction positionable ring elements 37 arranged or can be arranged, wherein in or on these ring elements 37 in turn at least one, preferably several, z. B. between two and twelve, advantageously between five and ten, magnets 44 or magnet devices 34 are arranged or can be arranged one behind the other in the circumferential direction and preferably in the circumferential direction (see e.g. 6 ).
  • the ring elements 37 are in the area of their outer circumference, for example, by circumferential covers 48, z. B.
  • suction openings 49 are provided at the respective location of the magnetic elements 44 (indicated as an example for a part of the right ring element 37 in 6 ).
  • a cover plate 48 extending axially over all ring elements 37 can be provided, which includes the recesses and/or suction openings 49 at the relevant points.
  • the suction openings 49 in particular the suction channels 51 lying underneath, are in line connection with a vacuum pump.
  • line 53 running centrally in the axial direction, e.g.
  • the magnetic cylinder 33 can be designed without any holding means acting on the substrate 02. If necessary, the above mentioned Suction air openings can be provided, which are connected to a vacuum pump and ensure that substrate 02 rests securely on the lateral surface.
  • holding means 36 e.g. g. grippers 36 of what is known as a gripper strip, by means of which a substrate sheet 02 to be conveyed via the cylinder 33 is picked up by its leading end and can or is held over an angular range during a rotation of the cylinder 33.
  • a magnetic cylinder 33 configured in this way is used at the same time to transport the substrate 02.
  • the magnetic cylinder 33 is provided with two cylinder pins 52.1; 52.2 rotatable in frame walls 38; 39, e.g. B. side panels 38; 39 of a frame carrying the components of the alignment device 07.
  • cylinder pin 52.1; 52.2 can also be understood as the embodiment shown here, according to which the above “cylindrical pins"52.1; 52.2 by ends of a continuous shaft 52 projecting beyond the cylinder barrel.
  • the bearing is designed in such a way that the cylinder 33 can be removed from the frame and used again.
  • both front pins 52.1; 52.2 is preferably supported on a bearing shell 58.1 of a multi-part radial bearing 58, which in the operational state is completed by a second bearing shell 58.2 to form a closed bearing ring.
  • One of the two pins 52.1; 52.2 is in the operational state by a shaft piece 59, ie a shaft 59, z. B. drive shaft 59 continued, the output side in the assembled state of the cylinder 33 with the pin 52.1; 52.2 is rotatably connected.
  • the shaft 59 z. B. rotatably connected to a cylinder 33 rotationally driving drive wheel 61, z. B.
  • helical gear 61 connected, which is driven, for example, via a drive train together with another unit of machine 01 or by a specially provided drive motor.
  • the other pin 52.2; 52.1 can in principle also be continued by a drive shaft and/or comprise a line 53 for the suction air with an opening at the front.
  • the journal length and arrangement of the radial bearing 58 are preferably dimensioned such that the overall length of the journal 52.1; 52.2 encompassing cylinder 33 is smaller than the clear width of the frame on at least one path of movement extending radially, in particular substantially vertically, to the outside of the frame for removing the cylinder 33.
  • a one-part or multi-part seal 78 can be provided, which in the assembled state continues the line 53 for the suction air through a central recess, in the case of the continuation through a shaft 59
  • the non-rotatable connection between pins 52.1; 52.2 and shaft 59 takes over or at least a corresponding non-rotatable connection between shaft 59 and pin 52.1; 52.2 accommodates.
  • the seal 78 can comprise two wedge-like disks which can be braced against one another with their sloping surfaces.
  • the bearing means accommodating the journals of the cylinder 33 and/or, for example, the journals 52.1; 52.2 of the cylinder 33 is designed in such a way that the cylinder position in the frame can optionally be equipped with a pure transfer cylinder (without magnetic devices 34) instead of with the magnetic cylinder 33.
  • At least one transmitter 63 for transmitting electrical energy and/or control signals from the outside into or on the rotating cylinder 33 is provided on the magnetic cylinder 33, which can preferably be removed from the frame.
  • This transformer 63 is preferably as a contactless transmitter 63, z. B. executed as an electromagnetic coupler 63, and serves both the transmission of electrical energy, for example, to drive the motors 46, as well as the transmission of signals for the motor control, z. B. of control specifications for entrained in the cylinder 33 control means, z. B. a microprocessor control, or directly to the engine controls to be supplied control signals.
  • Such specifications or control signals can include a target status ("active"/"inactive") and/or the target speed for the motor 46 in question and/or information about the current machine speed and/or parameter values for parameterizing the control means and/or the motor controls.
  • a coupler 63 designed as a contactless transmitter 63 comprises two transmitter parts 64 which can be rotated relative to one another; 66, namely a frame-fixed transmitter part 64 and a transmitter part 66, which is fixed to the cylinder at least when the cylinder 33 is installed or during operation, by means of which the control signals and/or control specifications are and/or can be transmitted via electromagnetic signals and/or fields.
  • the transmitter parts 64; 66 are preferably ring-shaped, in particular as closed rings, and are each arranged concentrically around the axis of rotation of the magnetic cylinder 33 .
  • the—preferably annular—transmitter parts 64; 66 arranged axially side by side and have -at least what their active elements effective for electromagnetic transmission such.
  • control signals and / or control specifications to the cylinder 33 acts towards the z. B. on the frame torsionally arranged transformer part 64 z. B. as a transmitting unit 64 and the transmitter part 66 fixed to the cylinder as a receiving unit 66 that can be wirelessly coupled with this signaling unit.
  • the control signals and / or Control specifications can be transmitted in particular from a machine control S or a control S integrated in this into the cylinder 33 .
  • the transmitter part 66 which is fixed to the cylinder during operation, is attached to the rotatable part remaining in the frame, e.g. B. the shaft piece 59 or 62, and thus remains when removing the cylinder 33 in the frame. This avoids errors or time-consuming adjustments when reinserting.
  • the coupler 63 for bidirectional signal transmission is connected to a first transmission channel 67 for the above-mentioned transmission of control signals and/or control specifications to the cylinder 33 and to a second transmission channel 68 for the reverse transmission of signals, e.g. B. to transmit an actual status ("rotates” / "stands") of the motors 46 and / or error messages from the motors 46 such. B. "defective" and / or to rotational positions and / or angular speeds of the motors 46, from the cylinder 33 back to the frame-mounted transmitter part 64 and from there to the external control.
  • the cylinder-fixed transmitter part 66 acts as a transmitter unit 66 and the frame-mounted transmitter part 64 acts as a receiver unit 64 .
  • the signal transmission on at least the last section from the external controller S to the frame-fixed transmitter part 64, in particular data electronics 69 contained in this, the contactless transmission to the cylinder-fixed transmitter part 66, in particular data electronics 71 contained in this, and from there to the motors 46, in particular the control logic 72 of the engine controls or a central control means and/or the signal transmission in the reverse direction takes place via a bus system 73; 74, preferably via a CAN bus 73; 74, and/or based on a standardized communication protocol for data buses, e.g. B. a CAN protocol, in particular CANopen ® .
  • the route between the two data electronics 69; 71 despite the partly electromagnetic and partly immaterial transmission path due to the consistent protocol as mentioned bus system 73; 74 to be properly understood.
  • the electrical energy for operating the motors 46 and possibly energy-consuming control means is also transmitted without contact via the coupler 63 .
  • This transfer takes place e.g. B. also generated by electromagnetic induction.
  • electrical power is supplied to the frame-fixed transmitter part 64, in particular to power electronics 76 comprised by this, this is fed via electromagnetic induction without contact to the cylinder-fixed transmitter part 66, in particular to power electronics 77 comprised by this, and finally there to the supply of Power p for the operation of the motors 46 is used.
  • the power source P provides a 24V DC voltage
  • the power electronics 77 of the cylinder-fixed transmitter part 66 provides power with a voltage of 12V DC for a power part p of the motors 46 .
  • a PLC can be provided as the controller S located outside of the cylinder 33, which in turn is connected to the machine controller S or is integrated into it.
  • a converter can be provided between the controller S and the data electronics 69 of the frame-fixed transmitter part 64, which converter converts the signals coming from the controller S to a CAN bus protocol that is presented above as being preferred.
  • the transmitter 63 can be provided on either of the two end faces of the cylinder 33 .
  • a shaft 52 is already provided--also in the event of a possible removal of the cylinder 33 on the frame mentioned above--the transmitter 63 is advantageously provided on the drive-side end face of the cylinder 33.
  • the above-mentioned suction air connection with z. B. an above line 53, a rotary union 54 and optionally a seal 78 is provided.
  • the transmitter 63 is preferably arranged on the frame, or on the relevant frame wall 38, so that it can remain on the frame while the cylinder 33 together with the pins 52.1; 52.2 is lifted out of the frame.
  • at least the frame-fixed transmitter part 64 is arranged, for example at least partially, preferably over its entire length in the axial direction, in a recess in the frame wall 38 in such a way that it at least dips into the frame plane on the inside of the frame, or preferably completely is incorporated into it.
  • the transmitter part 66 which is fixed to the cylinder during operation, also at least partially dips into the plane of the frame or is even completely accommodated in it.
  • the clear width of the frame must be made only slightly or insignificantly larger than the length of the cylinder 33 with the pin 52.1; 52.2.
  • the above signals and/or the electrical power is transmitted to the frame-fixed transmitter part 64 via corresponding connections 79; 81 supplied and from the cylinder-fixed transmitter part 66 via corresponding connections 82; 83 discharged into the cylinder 33.
  • a corresponding signal line 84 and/or a line 86 for the power supply can be routed in an axially running groove 87 in the shaft 52, and a corresponding number of line branches 84.1; 84.2; 86.1; 86.2 branch off.
  • the groove 87 can be in or directly adjacent to one of the above-mentioned Gripper bar receiving channel may be provided.
  • the line branches 84.1; 84.2; 86.1; 86.2 for signal transmission and/or for power supply can in principle be routed directly to or in the magnetic devices 34 and connected there, e.g. B. be stuck. -The transfer of performance and / or control signals can also such.
  • this can basically be realized by a section extending in the circumferential direction with electrically conductive paths on the underside or on the side of the magnetic device 34 and by corresponding stationary, in particular spring-loaded, contact pins on the cylinder body. It is also conceivable to provide electrically conductive path sections extending in the circumferential direction both on the magnetic device 34 and on the cylinder body, which nevertheless overlap on a circumferential section when the magnetic device 34 is positioned differently and make contact.
  • the contact elements 91.1; 91.2; 92.1; 92.2 are e.g. B. on the carrier 47, preferably on the support element 47.1, arranged and / or preferably as spring-loaded contact pins 91.1; 91.2; 92.1; 92.2 formed, which when inserting the magnetic device 34 on the cylinder 33 against the conductor tracks 88.1; 88.2; 89.1; 89.2 are pressed and e.g. B. deflect at least slightly.
  • electrically conductive paths 88.1 run; 88.2; 89.1; 89.2 in sections or continuously over the entire circumferential section provided for possible equipping with magnetic devices 34 in a recess 93 running in the circumferential direction.
  • the tracks 88.1; 88.2; 89.1; 89.2 run on one or both opposite side walls, the contact elements 91.1; 91.2; 92.1; 92.2 are then provided correspondingly on the side of the magnetic device 34.
  • the contact elements 91.1; 91.2; 92.1; 92.2 are provided on the underside of the magnet device 34, which points into the interior of the cylinder in the installed state, and act with tracks 88.1; 88.2; 89.1; 89.2 together.
  • two contact elements 91.1; 91.2; 92.1; 92.2 and two lanes 88.1; 88.2; 89.1; 89.2 and two tracks 88.1; 88.2; 89.1; 89.2 supplying line branches 84.1; 84.2; 86.1; 86.2 provided.
  • electrical connection elements are provided on each magnetic device 34 to be operated, in particular on its carrier 47, in particular on the support element 47.1, in or on which Ends of line branches 84.1 transmitting the electrical power and/or the electrical signals; 84.2; 86.1; 86.2 are or can be fastened by friction, positive locking or, if necessary, material locking and via which the electrical power and/or the signals can be supplied to the magnetic device 34 in question.
  • the line branches 84.1; 84.2; 86.1; 86.2 prefers an excess length compared to the length actually required.
  • connection elements connected or connectable to the line ends are connected through inputs of a contact strip 98, e.g. B. terminal strip 98, trained connecting part 98 is formed, which is arranged on the magnetic device 34.
  • a contact strip 98 e.g. B. terminal strip 98
  • trained connecting part 98 is formed, which is arranged on the magnetic device 34.
  • This can be provided on the carrier 47 in the embodiment of the magnetic device 34 that cannot be divided operationally.
  • this is preferably arranged on the support element 47.1 that accommodates the magnet unit 43 in a detachable manner.
  • connection elements or such a terminal block 98 are, for example, on one of the magnet units 43 facing away, e.g. B. side of the support element 47.1 pointing into the cylinder interior is provided, with contact elements 88.1, 88.2; 89.1; 89.2 are provided on the side facing the magnet unit 43.
  • the contact elements 88.1, 88.2; 89.1; 89.2 provided on the side of the clamping element 94 facing the magnet unit 43 under a recess in the base of the supporting element 47.1 to be clamped and the connecting elements on the inward-facing side of the clamping element 94.
  • the contact elements 88.1, 88.2; 89.1; 89.2 are such to corresponding contact elements 91.1; 91.2, 92.1; 92.2 is arranged on the magnet unit 43, in particular in its bottom area, so that the contact elements 88.1, 88.2; 89.1; 89.2 91.1; 91.2, 92.1; 92.2 are in electrically conductive contact when the magnet unit 43 is properly mounted or inserted, for example through the recess in the bottom of the support element 47.1.
  • the corresponding contact elements 91.1; 91.2, 92.1; 92.2 are electrically connected to the motor 46 and/or to its control logic 72.
  • connection elements or the terminal strip 98 and the contact elements 88.1, 88.2; 89.1; 89.2 are, for example, a plate 101 made of electrically insulating material on both sides, e.g. B. a circuit board provided.
  • the connection elements e.g. B. as inputs of the above-mentioned terminal strip 98, and on the other side pointing towards the magnet unit 43, the contact elements 88.1, 88.2; 89.1; 89.2, e.g. B. as contact surfaces 88.1, 88.2; 89.1; 89.2.
  • the corresponding contact elements 91.1; 91.2, 92.1; 92.2 on the magnet unit 43 are, for example, preferably also here as spring-loaded contact pins 91.1; 91.2; 92.1; 92.2 trained.
  • a connecting part 99 designed as a line-side plug part 99 is provided which can be releasably connected in an electrically conductive manner to contacts of a plug part which is provided on the magnetic device 34 and is not visible in the figures.
  • the connector part on the magnetic device side can be arranged directly on the one-piece housing 47 or frame 47 of the magnetic device 34 or on the support element 47.1 of the multi-part magnetic device 34.
  • the line branch sections of the line branches 84.1; 84.2; 86.1; 86.2 for power supply and/or signal transmission are combined to form strands of wire 104 and run between two magnetic devices 34 that are adjacent to one another in the circumferential direction, from the output-side connection elements of one magnetic device 34 to the input-side connection elements of the following magnetic device 34.
  • the Cable strands 104 are preferably designed with a greater length than the distance between the connection points of two circumferentially adjacent magnetic devices 34 and/or laid in the form of loops inside the cylinder.
  • line branches 84.1; 84.2 and the interfaces to the control software assigned to the magnetic devices 34 are designed as a bus system.
  • At least one drying and/or curing device 41 is or can be arranged, e.g. on its first side, which has the optically variable coating medium 06. Viewed in the transport direction T, this is preferably directed at a lateral surface segment of the magnetic cylinder 33 lying in the transport path or at a point in the transport path at which the substrate 02 to be conveyed is guided on the magnetic cylinder 33 during operation - in particular with its second side.
  • At least one outer layer of coating medium 06 applied to the substrate 02 is dried or hardened directly.
  • at which the first drying and/or curing device 41 is directed is preferably located at least 90° behind the point at which the substrate 02 to be conveyed on its transport path runs onto the magnetic cylinder 33 and in front of the point at which the substrate 02 to be conveyed on its transport path.
  • the substrate 02 to be conveyed via the magnetic cylinder 33 leaves the magnetic cylinder 33. There is therefore sufficient time for the magnets 44 to rotate and the magnetic particles to be aligned as a result. If necessary, the rotation can be switched off when the drying and/or curing device 41 is reached.
  • the drying and/or curing device 41 can be provided in the transport path downstream of the magnetic cylinder 33 .
  • the generated image is not "frozen” before the substrate 02 leaves the magnetic cylinder 33, but here, too, trouble-free alignment without switching off the magnet rotation is not possible.
  • the drying and/or curing device 41 is preferably a radiation dryer 41, e.g. B. UV dryer 41, in particular UV LED dryer 41, and works on the basis of electromagnetic radiation, e.g. B. with IR or preferably UV radiation. To this end, it has one or more radiation sources, e.g. B. IR or preferably UV light sources, in particular a variety of UV-LRDs.
  • the first drying and/or curing device 41 it is designed - in at least one operating mode - not to act on the substrate 02 to be treated continuously over its entire width, but rather in sections that are spaced apart from one another. These can preferably be adjusted in their position transversely to the transport direction T of the substrate 02 and, if necessary, defined in their respective effective width.
  • the drying and/or curing device 41 can have several, e.g. B. between four and seven, in particular between four and six, directed towards the transport path dryer heads, which are preferably variable in their position transverse to the transport direction T.
  • the drying and/or curing device 41 can have a dryer and/or curing element 41 that extends transversely to the transport direction T over at least the width of the maximum substrate width to be treated in the device 07, in particular in the manner of a beam in the form of a light strip, in particular LED light strip, which or which transverse to the transport direction T a variety of radiation sources, z. B. IR or preferably UV radiation sources, preferably UV LEDs. included next to each other.
  • Sections on which the substrate 02 is to be acted upon can preferably be formed by groups of active radiation sources or radiation sources that are to be activated, between which there are groups of inactive light sources or light sources that are not to be activated.
  • the sections can be varied in their position and preferably width by defining the active radiation sources or those to be activated.
  • the magnetic cylinder 33 can in principle be driven by a drive motor assigned to the magnetic cylinder 33, e.g. B. position-controlled servo motor driven.
  • the magnetic cylinder 33 is connected by the upstream or downstream gripper circulating conveyor 19; 26, in particular via at least one of the two endless traction means 21; 28, in particular endless chains 21; 28, of the relevant gripper circulating conveyor 19; 26, in particular chain gripper system 19; 26 powered.
  • a smoothing device such. B. a plurality of rollers spaced apart in the axial direction or one or more rollers may be provided, which is or can be thrown onto the cylinder 33 in the transport path of the substrate 02 between the point of accumulation and the point of drying or curing over the substrate 02.
  • the magnetic cylinder 33 is provided with its own vacuum pump for supplying the suction openings 49 provided on the lateral surface with negative pressure.
  • the magnetic cylinder 33 can be designed with covers 48 that are essentially limited to the ring elements 37 and, if necessary, have additional support rings between the ring elements 37 or a continuous cover 48, e.g. B. cover plate 48, in which areas for the magnetic elements 44 and devices 34 are recessed and which z. B. holes as suction openings 49 has.
  • covers 48 that are essentially limited to the ring elements 37 and, if necessary, have additional support rings between the ring elements 37 or a continuous cover 48, e.g. B. cover plate 48, in which areas for the magnetic elements 44 and devices 34 are recessed and which z. B. holes as suction openings 49 has.
  • At least two adjacent, but preferably all of the, axially movable ring elements 37 that contain or can be equipped with the magnetic devices 34 can be at least in a cover plate 48 contributing to the cylindrical envelope surface of the cylinder 33 on the sides facing one another in the axial direction of the cylinder 33 in the axial direction in such a tooth-like or fan-like manner with projections, e.g. B. in the manner of tabs or lugs, and corresponding recesses, z. B.
  • cutouts or troughs be formed and offset in the circumferential direction, so that when two adjacent ring elements 37 move axially towards one another, the tooth-like widenings of one ring element 37 can dip into the corresponding recesses of the other ring element 37 . This makes it possible to achieve the most uniform possible support for the printing material 02 given possible variations in spacing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Credit Cards Or The Like (AREA)
  • Registering Or Overturning Sheets (AREA)
  • Printing Methods (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Rotary Presses (AREA)
  • Screen Printers (AREA)
EP19725147.3A 2018-07-25 2019-05-17 Vorrichtungen zum ausrichten von magnetischen oder magnetisierbaren partikeln sowie maschine zur erzeugung optisch variabler bildelemente Active EP3826852B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102018212427.2A DE102018212427A1 (de) 2018-07-25 2018-07-25 Maschine und Verfahren zur Erzeugung optisch variabler Bildelemente auf einem Substrat
DE102018212429.9A DE102018212429B4 (de) 2018-07-25 2018-07-25 Vorrichtung zum Ausrichten von magnetischen oder magnetisierbaren Partikeln, Maschine und Verfahren zur Erzeugung optisch variabler Bildelemente
PCT/EP2019/062812 WO2020020507A1 (de) 2018-07-25 2019-05-17 Vorrichtungen zum ausrichten von magnetischen oder magnetisierbaren partikeln, maschine und verfahren zur erzeugung optisch variabler bildelemente

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EP3826852A1 EP3826852A1 (de) 2021-06-02
EP3826852B1 true EP3826852B1 (de) 2022-08-03

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BR (1) BR112020022029A2 (pt)
CA (1) CA3102942C (pt)
CL (1) CL2020003210A1 (pt)
CO (1) CO2020014141A2 (pt)
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PL (1) PL3826852T3 (pt)
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CA3200869A1 (en) * 2020-10-01 2022-04-07 Koenig & Bauer Ag Machine for generating optically variable image elements
DE102021105636A1 (de) 2021-03-09 2022-09-15 Koenig & Bauer Ag Siebdruckeinheit und eine als Siebdruckeinheit ausgebildete Bogendruckeinheit
DE102021105640A1 (de) 2021-03-09 2022-09-15 Koenig & Bauer Ag Siebdruckeinheit mit zwei Basismodulen
DE102021105634A1 (de) 2021-03-09 2022-09-15 Koenig & Bauer Ag Siebdruckeinheit und ein Verfahren zum Betreiben einer als Siebdruckeinheit ausgebildeten Bogendruckeinheit
CN116021873A (zh) * 2023-03-30 2023-04-28 福建佶龙机械科技股份有限公司 一种圆网印花机的网头传动网座

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PL3826852T3 (pl) 2022-12-12
WO2020020507A1 (de) 2020-01-30
US20210053339A1 (en) 2021-02-25
AU2019311143A1 (en) 2020-11-26
ZA202006733B (en) 2022-01-26
CN112533760A (zh) 2021-03-19
PT3826852T (pt) 2022-09-06
BR112020022029A2 (pt) 2021-02-09
KR102361940B1 (ko) 2022-02-14
UA127287C2 (uk) 2023-07-12
CA3102942A1 (en) 2020-01-30
EP3826852A1 (de) 2021-06-02
ES2929050T3 (es) 2022-11-24
MX2020013508A (es) 2021-11-23
CL2020003210A1 (es) 2021-05-24
JP2021511987A (ja) 2021-05-13
JP6935025B2 (ja) 2021-09-15
CA3102942C (en) 2022-04-05
RU2752130C1 (ru) 2021-07-23
KR20210005645A (ko) 2021-01-14
MY184749A (en) 2021-04-20
US11072164B2 (en) 2021-07-27
CO2020014141A2 (es) 2020-11-30
AU2019311143B2 (en) 2021-08-12
CN112533760B (zh) 2022-07-01

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