EP3044004B1 - Printer for printing on 3-dimensional objects - Google Patents
Printer for printing on 3-dimensional objects Download PDFInfo
- Publication number
- EP3044004B1 EP3044004B1 EP14762041.3A EP14762041A EP3044004B1 EP 3044004 B1 EP3044004 B1 EP 3044004B1 EP 14762041 A EP14762041 A EP 14762041A EP 3044004 B1 EP3044004 B1 EP 3044004B1
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- EP
- European Patent Office
- Prior art keywords
- printing
- stamp
- printed
- dimensional object
- machine
- 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.)
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- 238000007639 printing Methods 0.000 title claims description 331
- 238000000034 method Methods 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 13
- 230000007246 mechanism Effects 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 3
- 239000000049 pigment Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 2
- 239000000976 ink Substances 0.000 description 65
- 230000002093 peripheral effect Effects 0.000 description 16
- 238000012546 transfer Methods 0.000 description 8
- 239000003086 colorant Substances 0.000 description 7
- 238000012545 processing Methods 0.000 description 6
- 238000007649 pad printing Methods 0.000 description 5
- 239000003973 paint Substances 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000007641 inkjet printing Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 230000032258 transport Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000007646 gravure printing Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000007645 offset printing Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010017 direct printing Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000010023 transfer printing Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
- B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
- B41J3/4073—Printing on three-dimensional objects not being in sheet or web form, e.g. spherical or cubic objects
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F17/00—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for
- B41F17/001—Pad printing apparatus or machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
- B41J29/40—Means for printing fixed, i.e. unchanging, matter in addition to selectable matter
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
- B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
- B41J3/4073—Printing on three-dimensional objects not being in sheet or web form, e.g. spherical or cubic objects
- B41J3/40733—Printing on cylindrical or rotationally symmetrical objects, e. g. on bottles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
- B41J3/54—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed with two or more sets of type or printing elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
- B41J3/54—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed with two or more sets of type or printing elements
- B41J3/546—Combination of different types, e.g. using a thermal transfer head and an inkjet print head
Definitions
- the invention relates to a printing machine for printing 3-dimensional objects according to the preamble of claim 1.
- the proposed printing machine is particularly suitable for digital printing of 3-dimensional rotationally symmetrical objects, such as bottles or cans.
- the printing press has at least one inkjet printhead or a plurality of inkjet printheads having, for example, various inks such as cyan (C), magenta (M), yellow (Y) and / or black (K) and a turntable for receiving the 3-dimensional object wherein the turntable is adapted to place the object in front of the inkjet printhead or the plurality of inkjet printheads and to rotate about its own axis so that the surface to be imprinted of the 3-dimensional object for digital printing, with the ink droplets on the surface if necessary drop-on-demand), past the inkjet printhead or inkjet printheads.
- various inks such as cyan (C), magenta (M), yellow (Y) and / or black (K)
- the turntable is adapted to place the object in front of the inkjet printhead or the plurality of inkjet printheads and to rotate about its own axis so that the surface to be imprinted of the 3-dimensional object for digital printing, with the ink drop
- 3-dimensional objects such as bottles or cans, for example, made of glass, plastic and / or metal, have hitherto been labeled or printed by screen printing.
- a direct digital decoration of the surfaces of the 3-dimensional objects by means of inkjet printheads is possible, which work on the drop-on-demand principle.
- Used for digital printing machines are known in several embodiments.
- individual printing machines for small quantities in terms of volume
- clock machines in which several individual printing machines juxtaposed and several each standing on a station objects are printed simultaneously.
- the performance of the overall machine corresponds to the multiple of the individual output of a single station, which in particular can each be equipped with individual printing machines.
- Characteristic of clock machines is the simultaneous change of several to be printed 3-dimensional objects in the individual stations.
- cyclically operating machines are usually designed in such a way that the individual inks or colors to be printed are printed successively in successive stations.
- the performance of such a cycle machine is limited by the speed of a printhead, which dictates the time for printing on a 3-dimensional object. This time determines the cycle time significantly.
- Such imprints are required on such decorations, which must be done by means of special inks, e.g. the application of a deposit logo for disposable containers for drinks in Germany.
- inks are typically security inks that are anti-counterfeiting and, due to their nature, are not suitable for use in inkjet printheads.
- Such prints are typically applied to the waist circumference of a 3-dimensional object, such as a garment. a bottle or can as a disposable container, since they must be captive.
- Such logos or special imprints are generally standardized and, unlike digital printing, which is designed for variable data and decors, are not subject to frequent changes in print design.
- the DE 10 2007 020 635 A1 describes the use of security ink in an item identification system.
- the DE 29 38 026 A1 discloses a stamp device with a matrix printer as a variable stamp element.
- the WO 03/106177 A2 discloses an apparatus for surface treating parts having a plurality of different processing stations at which different machining processes are performed.
- the machining processes include printing on the parts using inkjet printheads, as well as screen printing, offset printing, flexographic printing, or gravure printing.
- the device has a conveying unit embodied as a rotary transfer machine, which transports the parts to predetermined stationary positions at the stationary processing stations. After transport, the rotary transfer machine stands still for the processing time on the parts. After processing, ie, in cycles, the rotary transfer machine is then rotated further to handle a next part in the respective processing station.
- WO 2009/018892 A1 Different devices for printing on containers are known.
- a device describes a direct printing of the container with ink jet printheads, which are switched on and off for the partial printing by an ink jet printhead from the printing position is movable and another printhead is movable into the printing position.
- the disclosed WO 2009/018892 A1 a different device for printing the containers by means of a transfer printing, is printed with the ink jet print heads on transfer pads (and not directly on the container), which transfer the image by rolling on the respective container. The transfer pads and the containers are moved at different speeds, which roll the transfer pads on the surface of the container.
- the object of the present invention is therefore to propose a possibility to provide such digitally decorated objects in large numbers with imprints that require non-inkjetdruckschreibe printing inks.
- the printing machine has at least one printing unit with at least one stamp for printing on the 3-dimensional object by means of a separate printing of a marking or a logo executed as a stamping pressure.
- the printing machine has at least one printing unit with at least one stamp for printing on the 3-dimensional object by means of a separate printing of a marking or a logo executed as a stamping pressure.
- it is therefore proposed to apply such prints or logos, for which a special ink is necessary, by means of a stamp printing.
- a stamp printing in combination with digital printing With such a complex solution, it is possible not only to achieve the high required quantities of up to 20 stamping prints per second, but also to achieve a dimensionally accurate, high-quality imprint. Transferring the spot color to the object by means of stamp printing is not subject to pigment size or other criteria for digital inkjet inks.
- the printing unit also an inking device is provided, with which the ink is applied to the stamp or can be applied.
- the inking device may be an ink pad on which the stamp is pressed to receive the ink.
- a controlled inking roller comes into consideration. With both solutions, the printing ink can be applied at the speed required for high volumes.
- stamp and “stamp printing” in the context of this description include in addition to a classic stamp or stamp printing and the terms “tampon” and “pad printing” with a.
- stamp in the classical sense forms a raised, dimensionally stable printing forme with the motif to be printed, which is moved to an ink pad for the ink application while receiving the ink according to the raised printing form
- a tampon is an elastic pressure body, for the paint on a cliché filled with the ink (in the sense of a die) is placed, in which the motif to be printed forms a depression filled with the printing ink.
- placing the tampon on the cliché takes the tampon in the area of the motif to be printed on the ink.
- Both the stamp and the tampon are then pressed onto the surface of the object to be printed in order to image the desired motif there.
- the tampon has the The advantage that it adapts better due to its elasticity of the shape of the object to be printed.
- the principle of the printing is basically the same insofar as on the stamp or tampon applied to the motif to be printed corresponding color imprint and is finally transferred to the surface of the object to be printed.
- This printing principle is referred to in the context of the present disclosure as a stamp printing with a stamp and includes both the pressure with a stamp in the classical sense as well as with a tampon.
- the inking device is correspondingly designed as a die (cliché) with a filling device, wherein the filling device fills the recess representing the motif to be printed with the ink and keeps the non-recessed region of the die free of ink.
- a filling device for this purpose, for example, an inking roller of the filling device with the printing ink can be rolled over the die and the ink not absorbed in the depressions can be scraped off the surface of the die with a scraper.
- the filling device for this purpose may comprise the inking roller and the scraper, which are designed so as to be executable successively over the matrix and thus register the printing ink only in the recesses of the matrix.
- the printing press is designed for stamp printing to align the 3-dimensional object by means of actuators in front of the stamp so that the pressure takes place at a predetermined location of the 3-dimensional object.
- the actuators are set up to position the 3-dimensional object to be printed in front of the stamp.
- the proposed actuators can have adjustment options for all axes, so that the 3-dimensional object in alignment, position and / or height can be arranged freely in front of the stamp of the printing unit. The positioning thus takes place in such a way that the stamping pressure takes place at the predetermined location on the surface of the 3-dimensional object.
- the actuators cooperate with the turntable on which the 3-dimensional object is received in the digital printing with the at least one inkjet printhead.
- the actuators can be designed to move the turntable directly axially up and down and rotate. In this embodiment, therefore, the turntable is designed to place the object for the stamp printing in front of the stamp. Possibly. an actuator can also perform a radial adjustment of the axis of the turntable.
- the printing unit has a mechanical feed unit, which is adapted to print the stamp on the triggering signal on the 3-dimensional object.
- This is an easy-to-implement design for the printing unit, which has little space in the field of inkjet printheads and therefore can be particularly well combined with the facilities for digital printing in a printing station.
- the mechanical feed unit can be a, in particular designed as an adjustable cylinder, i. linearly adjusting, have mechanics that presses the stamp on the surface of the 3-dimensional object.
- An alternative to an adjusting cylinder as a delivery unit forms the inventively provided rotating wheel on the peripheral edge of the stamp is mounted such that the punch during the rotation of the wheel touches the surface of the 3-dimensional object and thereby performs the stamping pressure.
- the rotation of the stamp can also rotate past a suitably trained inking device, so that the stamp is applied during the Vorbeiwindens with the ink.
- the printing unit has a plurality of punches, which are arranged on a rotatable wheel at the peripheral edge of this wheel, wherein the wheel is arranged and arranged to rotate past the to be printed 3-dimensional objects in the printing press over so that the stamp the surface touch the objects to be printed.
- a continuous process can be achieved by each stamp imprinting one or more objects.
- the successively arranged stamps have different inks, if necessary, two- or multi-color printing can be achieved.
- a stamp on the rotating wheel prints in each case the object that is currently at the printing position in the printing press on which the stamp rotates past. Possibly. It is thus also possible to provide a printing press with continuously transported objects for a (quasi) continuous stamping printing by successively printing the objects through the stamp arranged on the wheel.
- the printing press is preferably set up to perform the stamp printing after the digital printing has been carried out, so that the stamp printing can in principle also take place on already digitally printed surfaces.
- Single-printing machines or stations of printing machines with a plurality of individual printing machines, each having at least one ink-jet printhead and a printing unit with a stamp are in this sense preferably adapted to first perform the digital printing and after this additionally apply a stamping (also in the sense: pad printing).
- the 3-dimensional object without taking it from a on / clamping eg.
- On a turntable aligned by means of suitable adjustment, such as servomotors, so in front of the stamp that the stamping pressure can be applied to a designated location.
- the stamp can thereby according to the invention in a single-printing machine by means of a mechanism, for example by an adjustable cylinder, pressed onto the object surface and so a corresponding impression can be generated.
- the printing machine is designed as a carousel machine with a plurality of printing stations, which at the outer peripheral edge of a machine wheel, i. on the machine wheel co-rotating, are preferably arranged equidistant in a vorvoreben Bogenforce and are each designed as a single printing machine for digital printing of 3-dimensional objects with at least one inkjet printhead or more inkjet printheads and a turntable for receiving the 3-dimensional object, wherein the machine wheel with the Printing stations rotated during the printing of the 3-dimensional objects in each case a preferably constant, predetermined peripheral speed.
- a single-printing machine of a printing station for digital printing of 3-dimensional objects at a printing station of the printing press thus corresponds in structure and function of the printing machine described in the preamble, wherein in the carousel machine more of these individual printing machines on a preferably continuously rotating machine wheel. Trained as a carousel machine printing machine is adapted to that during the rotation of the machine wheel in one or each individual printing machine digital printing of the three-dimensional object is performed.
- the digital printing takes place between an inlet device, with which the 3-dimensional object is fed to a single-printing machine of the printing press, and a discharge device, with which the 3-dimensional object is again executed after digital printing from the single-printing machine of the printing press.
- the stamping pressure then takes place between the inlet device and the outlet device.
- each individual printing press at a printing station of the printing press may have a prescribed printing unit with a stamp for printing on the 3-dimensional object by means of stamp printing.
- stamps on the rotatable wheel of the printing unit and the surfaces to be printed recorded in the printing stations of the carousel machine 3-dimensional objects on the machine wheel with the same radians, i. an identical or similar radian measure with preferably less than 10% deviation, are arranged and move at the same peripheral speed, in particular an identical or similar peripheral speed, preferably less than 10% deviation, so that the successively arranged stamp on the rotating wheel in each printing on the peripheral edge in successive printing stations 3-dimensional objects by means of stamp printing when touching the surface of the 3-dimensional objects by the stamp.
- a gearwheel-like other gear is arranged on the outer circle of the outer surface of the surface to be printed, which is operated at the same or almost the same peripheral speed as the carousel.
- the drive is thus synchronized with the carousel.
- the multiple stamps are arranged according to the invention, the are arranged in the same or almost equal pitch as the objects to be printed on the circumference of the carousel in the printing stations.
- This wheel with the punches is either connected to the digital press or pushed so to the digital press, that the stamps touch the surface of the 3-dimensional objects for printing sufficiently to perform the stamp printing.
- the wheel has the same radians between the punches or tampons as the objects on the digital press.
- This different radians could be compensated according to the invention by appropriate format parts for each object diameter.
- the installation and adjustment of such formats are expensive.
- the radian measure between two successive punches be between a minimum radian measure and a maximum radian measure between three surfaces of the 3-dimensional objects to be imprinted in two successive individual 3-dimensional presses Objects of minimal extent (minimum radians) and for 3-dimensional objects of maximum extent (maximum radians).
- the radians between two consecutive punches correspond exactly to the median between the minimum radians and the maximum radians.
- this radian measure is smaller or larger radians on the digital press between the stamp and the object surface to be printed in the following also called slip relative motion which is positive once and negative once, depending on the extent of the 3-dimensional object (greater or smaller than the median). According to the invention, it has been found that this slippage can be tolerated since it is usually a fraction of the printing width of a logo in the stamping printing. This will be explained below with reference to a concrete numerical example, without the concept described being restricted to precisely this specific example.
- the radian measure of an object outline on a printing press with 48 stations and 2.3 m pitch diameter varies with printing on e.g. 3-dimensional objects with 50 to 100 mm diameter between 157.08 mm and 153.80 mm.
- the mean value is therefore 155.44 mm. Since a typical logo in stamp printing (i.e., as defined in the "classic" stamp printing or in pad printing) has a size of about 9 mm printing width, the path to be printed is therefore 5.7% of the radian measure.
- the difference between the movement of the average value on the punch wheel (ie, the rotatable wheel with the multiple punches) and the 3-dimensional object on the carousel printing machine during the stamping pressure is therefore approximately 5.7% of the difference of the two sheet dimensions in 3-dimensional objects with the largest and smallest diameter, ie maximum and minimum extent.
- This radian difference results in the numerical example in absolute terms therefore about 1.63 mm and the approximately 5.7% of which are 0.09 mm, that is less than 1/10 mm.
- This difference can be neglected according to the invention, so that it is possible to print with a single division of the rotatable wheel with the multiple punches (Stkovrad) all different object sizes of the 3-dimensional objects in the stamp printing.
- the actuators for positioning the to-be-printed 3-dimensional object in front of the stamp are adapted to the 3-dimensional object during stamp printing in or against the direction of the surface of the 3-dimensional object to be printed, in a carousel machine so in or against the circumferential direction of movement of the machine wheel of the carousel machine to move.
- the pressure travel path is lengthened or shortened and at the same time a quasi-rolling motion as in the case of toothed wheels between the punch and the surface of the 3-dimensional object to be printed is achieved when the object diameter of the 3-dimensional objects deviates from the mean value.
- this can be achieved particularly simply by arranging the actuators for positioning the 3-dimensional object to be printed in front of the stamp to the 3-dimensional object during the stamping printing by determining the direction and speed of the movement of the 3-dimensional object that the peripheral speed of the surface of the 3-dimensional object to be printed corresponds to the peripheral speed of the punches on the rotary wheel.
- the turntable on which the object stands and which is driven by a servomotor or other suitable controllable motor can be correspondingly rotated during the stamping pressure in order to lengthen or shorten the pressure path.
- the motor of the turntable, on which the 3-dimensional object stands is rotated in or against the circumferential direction during the stamping or stamping operation.
- the peripheral speed of the surface to be printed of the object is either increased (when rotated in the circumferential direction of rotation of the carousel machine) or slowed down (when rotated against the circumferential direction of rotation of the carousel machine).
- a control device can be provided for controlling the digital printing and the stamping pressure, which controls the components of the printing press according to the invention in the manner described.
- the control device has a processor device, which is set up in particular by means of suitable program code means for executing the individual control steps.
- the control device is also set up to determine the rotation of the 3-dimensional object according to the calculation described by way of example, to determine the circumferential speed of the surface of the object to be printed and to set it accordingly.
- the extent of the 3-dimensional object is also known, preferably by a corresponding input and / or detection by means of a sensor, for example a camera.
- printing machines which are designed as a timing machine, in which a plurality of turntables in a vorvoreven radians, preferably equidistant, are arranged on a rotatable machine wheel and a plurality of printing stations in front of the outer periphery of the machine wheel in a vorvoreben the radians of the turntable corresponding distance are arranged in that, in each case, a turntable is arranged in front of a printing station in a rotational position of the machine wheel, wherein a plurality of printing stations have at least one inkjet print head for digital printing and at least one print station has a printing unit with a stamp for carrying out the stamping printing.
- each station can have its own stamp.
- the printing unit for the stamp printing in one of the printing stations with the digital color printing, preferably the last printing station with digital color printing, or to arrange in a separate printing station.
- the separate printing station is preferably arranged downstream of the printing stations for digital printing. In this arrangement, the stamping can be done in a cycle machine with only a small additional time.
- a printing unit can also be integrated into a machine part of the printing press in which the ink jet print heads are located.
- the printing unit is integrated in another machine part of the printing machine, which is different from the machine part with the ink jet print heads (9).
- the stamp printing can also take place at a decoupled time from the digital printing, possibly even detached from a carousel arrangement of the printing press for digital printing.
- the 3-dimensional objects of the a machine part of the printing press with the inkjet printheads are transported by a suitable conveyor to another machine part with the stamp printing unit.
- the form of the surface to be printed of the 3-dimensional object (within the limits of the given elasticity) adapting shape is particularly advantageous according to the invention when the printing unit has a tampon as a stamp in the sense of a structureless, elastic pressure body , which receives the ink by pressing on a die, which is also referred to as a cliché, in which a print image desired ink-filled depression is provided.
- a tampon as a stamp in the sense of a structureless, elastic pressure body , which receives the ink by pressing on a die, which is also referred to as a cliché, in which a print image desired ink-filled depression is provided.
- a preferred use of the printing machine according to the invention provides for the use of stamp printing for such prints which can not be achieved with inks which can be used in inkjet print heads. This applies in particular to security applications in which the authenticity of the imprint is determined by specific properties which can be measured without contact, in particular with sensors.
- the printing ink for the stamp printing is a security ink which is not processable in ink jet print heads in terms of pigment size and / or other properties, such as flow behavior or the like.
- the printing unit has an inking device with a controllable mechanism which is adapted to retract the inking device, if not 3-dimenional object to be printed.
- This can be provided, for example, if there is no 3-dimensional object in the printing station for the stamp printing or if there is no print command for the special 3-dimensional object in the printing station.
- the printing press has a common drying and / or curing device which cures or dries together, for example, the printing ink of the inkjet printing heads used for digital printing and the printing ink used for the stamp printing. by UV light.
- the stamping ink is then cured or dried together with the digital printing ink.
- Fig. 1 is designed as a single-printing press 1 is shown schematically with the essential components of the invention.
- the printing machine 1 has four ink jet printing heads 9 for the various printing inks, such as cyan (C), magenta (M), yellow (Y) and black (K), and an actuator-driven turntable 8 for receiving a 3-dimensional object 7 is formed in the illustrated embodiment as a bottle.
- This application with a bottle 7 is particularly preferred according to the invention.
- the turntable 8 with actuator is designed to place the 3-dimensional object 7 in front of the inkjet printheads 9 and to rotate about its own axis.
- the surface of the 3-dimensional object 7 becomes known manner digitally printed.
- ink droplets are sprayed onto the surface during the rotation of the object 7 if necessary (drop-on-demand method), so that the individual ink droplets on the surface produce the desired printed image.
- each ink-jet head 9 prints its color on a pixel of the surface. Mixed colors are created by printing different colors together. In the illustrated arrangement are each two inkjet printheads 9 in a plane of rotation.
- a total printing in four colors is produced so that the turntable positions and rotates the 3-dimensional object one after another in each of the two planes of rotation in front of the ink-jet printheads 9.
- the height adjustment is indicated by the two double arrows in the vertical direction.
- inkjet printheads 9 are also possible in principle to arrange the inkjet printheads 9 so distributed in a plane of rotation about the 3-dimensional object 7 that, during the rotation in this one plane of rotation, all the colors pass through the inkjet printheads onto the surface of the 3-dimensional object to be imprinted Object 7 are printed.
- the printing machine 1 additionally has a printing unit 22 with a stamp 5 for printing on the 3-dimensional object 7 by means of a separate printing of a marking or a logo carried out as stamp printing.
- the 3-dimensional object 7 is aligned by means of actuators in front of the punch 5, that the printing takes place at a predetermined position of the 3-dimensional object 7 by the punch 5 is pressed by the printing unit 22 on the surface of the object 7.
- the object is still located on the driven turntable 7, which is positioned in such a way in front of the printing unit 22 that the stamp can be pressed onto the desired position of the 3-dimensional object 7. This is in Fig. 1 indicated by the pointing to the object 7 arrow.
- an inking device 23 is further provided, with which the ink is applied to the punch 5.
- the stamp 5 is formed as a classic stamp with a raised, dimensionally stable printing form, which forms the motif to be printed, which is printed there when stamping the stamp 5 on the 3-dimensional object 7 in the stamp printing.
- the inking device 23 may simply comprise an ink pad 6, also referred to as an ink pad, onto which the stamp 5 is pressed by means of a mechanism.
- the punch 5 is pivotally mounted in the illustrated example.
- Fig. 1 shown, in which a punch 5 is shown both in the printing position in front of the 3-dimensional object and in front of the ink pad 6, wherein the adjustment is indicated by the arrow between the two positions. In a real stamp printing, these positions are controlled one after the other.
- the inventive process of printing the 3-dimensional object 7 in the printing press 1 can according to the invention proceed such that an object to be printed 7 set on the turntable 8 of the trained as a single station printing station 1 and - in the presentation - moved up and between the Ink jet printheads 9 is placed.
- the surface of the 3-dimensional object for digital printing on the drop-on-demand principle is guided past the inkjet printheads 9.
- the object 7 is lowered again on the turntable 8 by means of the actuator.
- digital printing can be combined according to the invention in a simple printing machine 1 with the stamp printing.
- a further embodiment of a printing machine 3 according to the invention is shown, which is designed as a carousel machine with multiple printing stations.
- the individual printing stations are formed on a rotating machine wheel 24.
- a single printing press according to the printing press 1 are arranged at each printing station.
- One of these single-pressure printing machines 1 is in Fig. 2 located, with a turntable 4 off Fig. 1 in essential functions corresponding turntable 14, four arranged in a plane of rotation about the turntable 14 ink jet print heads 9 and a printing unit 22 are provided with punch 5, which also lies in one plane of rotation.
- a plane of rotation is meant that the turntable 14 is arranged in an axial position and both the digital printing and the stamping of a recorded on the turntable 14 and rotating 3-dimensional object 7 takes place in this plane.
- the individual printing stations with the individual printing machines 1 are each arranged on the outer peripheral edge of a machine wheel 24 with the machine wheel 24 and preferably in a predominantly radian measure 12 equidistant.
- the individual printing stations represented by representation of the turntable 14, which are arranged in a radian measure 12 of the division on the machine wheel 24 of the carousel.
- a bottle 7 is shown as a 3-dimensional object 7.
- an inlet star wave 19 as an inlet device.
- an outlet starwave 20 is provided as a discharge device, with which the 3-dimensional objects 7 are removed again after the treatment on the printing machine 3.
- the inlet star shaft 19 and the outlet star shaft 20 are arranged tangentially on the machine wheel 24 of the printing press 3 and are respectively connected via an object feed 10 or object outlet 11 with a further, not shown transport system for the 3-dimensional objects 7.
- the course of the treatment is as follows:
- the 3-dimensional objects 7 travel over the inlet starwave 19 on the continuously rotating carousel of the printing press 3, on which the stations for the individual printing presses 1 are provided with ink jet printheads 9 in a regular division.
- all individual printing machines 1 are mounted.
- the objects 7 are placed in the single-printing machine 1 on the turntable 14, which by a in FIG. 1 in the turntable 8 apparent motor are driven as a drive.
- the digital printing is performed as in the embodiment according to FIG Fig. 1 described while the single-printing machine 1 continues to rotate on the machine wheel 24 of the printing machine 3.
- the finished printed objects are then removed from the printing machine 3 again via the outlet starwave.
- the stamping can be done by means of the printing unit 22, which as to Fig. 1 described works.
- a printing unit 22 is integrated into each individual printing press 1 of the printing machine 3.
- FIG. 2 Another second embodiment of the stamp printing is also in Fig. 2 represented with, without the two configurations must necessarily be combined with each other.
- this second embodiment can be dispensed according to the invention to the printing unit 22 in the individual printing presses 1 of the printing press 3.
- the individual printing machine 1 - in otherwise the same structure - so be formed without the printing unit 22.
- the printing machine 3 has a printing unit 25 for the stamping pressure, which is stationary adjacent to the machine wheel 24, that is not co-rotating with the machine wheel 24 of the printing machine 1, arranged such a punch 5 a recorded on the turntable 14 3-dimensional object. 7 touched in a rotational position of the machine wheel 24 and performs the stamping pressure.
- each 3-dimensional object can be printed in a single-printing machine during the rotation of the machine wheel 24 by the printing unit 25 with the stamp printing.
- the printing unit 25 has a rotatable wheel 15, also referred to as a punch wheel, on the peripheral edge of which several punches 5 are formed.
- the rotatable wheel 15 is arranged and arranged to rotate past the 3-dimensional objects 7 to be printed in the printing press 3 so that the punches 7 touch the surface of the objects 7 to be printed on the position of the surface which is radially outward relative to the printing machine 3.
- the machine wheel 24 (carousel) of the printing press 3 rotates at the same peripheral speed, the rotatable wheel 15, ideally in contant same sheet length 12 (radians) between two to be printed 3-dimensional objects 7 in successive printing stations two consecutive punch 5 on the stamp wheel 15 with the same arc length 13 (radians) are spaced.
- the 3-dimensional objects 7 to be printed in the printing machine 3 may have a different extension, i. from the center of the turntable 14 different radial extent (based on the printing press 3) protrude. If the object 7 is greater than an average between a maximum and a minimum extent of the (various) 3-dimensional objects 7 to be printed on the printing machine 3, its radians 12 are slightly larger than the radians 13 and the peripheral speed of the wheel 15 (Stamp wheel) with the stamps. This can be neglected in most cases, but can be proposed according to the invention to correct for larger deviations with the drive of the turntable 14 by this is rotated either to slow down against the circumferential direction of rotation of the carousel 3 or for a desired faster peripheral speed of the object. 7 is rotated in the circumferential direction of rotation. This has already been explained by way of example.
- These tampons get their form to be printed (respectively the motif to be printed) by also referred to as a cliché matrices 21, the on a die wheel 16 are mounted with the same pitch 13 and which is driven together with the rotatable wheel 15 (stamp wheel) with the tampons.
- These matrices 21 get their inking with ink by an inking roller 17, which is also driven synchronously with the Matrizenrad 16 and the stamp wheel 15.
- the inking roller 17 In the case of the absence of an object 7 or the command of not stamping for an object 7, the inking roller 17 for the time it would be in contact with the corresponding die 21 (or the punch 5 on the punch wheel 15), that is by the mechanism of Mechanics 18 withdrawn, so that the corresponding die 21 (or the corresponding punch 5) is rotated past without paint. Thereafter, the inking roller 17 pivots back for the application of paint on the subsequent die 21 or the subsequent stamp 5, if this (r) should get a paint job.
- Both embodiments ie the first embodiment with the printing unit 22 and the second embodiment with the printing unit 25, both in Fig. 2 can be used according to the invention each individually or in combination.
- FIG. 3 shows a timing machine as a printing press 4, in which a plurality of turntable 14 in a vorvoreben Radians are arranged equidistantly on a rotatable machine wheel 2 and a plurality of printing stations are arranged in front of the outer circumference of the machine wheel 2 in a vor Stuple 14 so that in a rotational position of the machine wheel 2 each a turntable 14 is arranged in front of the printing station, wherein a plurality of printing stations at least one inkjet printhead 9 for digital printing and a printing station has a printing unit 22 with a punch 5 for carrying out the stamping printing.
- the inlet or outlet takes place via an object inlet 10 or an object outlet 11.
- a drying takes place, following the object feed 10 following several successive printing stations drawn with the inkjet printheads 9, to which successively the 3-dimensional objects 7 are conveyed on the turntables of the machine wheel 2 at an angle ⁇ .
- the object 7 is then aligned on the turntable 14 on which it is located so that the point to be printed in the printing station before the punch 5 of the printing unit 22 is positioned.
- a stamp printing is done by means of stamp 5, before the object is removed again in the object outlet 11 of the machine 2.
- the stamp 5 can be designed as a classic stamp for classic stamp printing or as a pad for the pad printing.
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Description
Die Erfindung betrifft eine Druckmaschine zum Bedrucken von 3-dimensionalen Objekten gemäß dem Oberbegriff des Anspruchs 1. Die vorgeschlagene Druckmaschine eignet sich insbesondere zum digitalen Bedrucken von 3-dimensionalen rotationssymmetrischen Objekten, wie Flaschen oder Dosen.The invention relates to a printing machine for printing 3-dimensional objects according to the preamble of
Für den Digitaldruck ist weist die Druckmaschine mindestens einen Tintenstrahldruckkopf oder mehrere Tintenstrahldruckköpfe mit bspw. verschiedenen Druckfarben wie Cyan (C), Magenta (M), Yellow (Y) und/oder Schwarz (K) und einen Drehteller zur Aufnahme des 3-dimensionalen Objekts auf, wobei der Drehteller dazu ausgebildet ist, das Objekt vor dem Tintenstrahldruckkopf oder den mehreren Tintenstrahldruckköpfen zu platzieren und um seine eigene Achse zu rotieren, damit die zu bedruckende Oberfläche des 3-dimensionalen Objekts zum digitalen Bedrucken, bei dem bei Bedarf Tintentropfen auf die Oberfläche gespritzt werden (Drop-on-demand-Verfahren), an dem Tintenstrahldruckkopf oder den Tintenstrahldruckköpfen] vorbeigeführt wird.For digital printing, the printing press has at least one inkjet printhead or a plurality of inkjet printheads having, for example, various inks such as cyan (C), magenta (M), yellow (Y) and / or black (K) and a turntable for receiving the 3-dimensional object wherein the turntable is adapted to place the object in front of the inkjet printhead or the plurality of inkjet printheads and to rotate about its own axis so that the surface to be imprinted of the 3-dimensional object for digital printing, with the ink droplets on the surface if necessary drop-on-demand), past the inkjet printhead or inkjet printheads.
3-dimensionale Objekte, wie Flaschen oder Dosen bspw. aus Glas, Kunststoff und/oder Metall, wurden bisher etikettiert oder mittels Siebdruck bedruckt. Seit einiger Zeit ist dafür auch eine direkte digitale Dekoration der Oberflächen der 3-dimensionalen Objekte mittels Tintenstrahldruckköpfen möglich, die nach dem Drop-on-demand-Prinzip arbeiten.3-dimensional objects, such as bottles or cans, for example, made of glass, plastic and / or metal, have hitherto been labeled or printed by screen printing. For some time, a direct digital decoration of the surfaces of the 3-dimensional objects by means of inkjet printheads is possible, which work on the drop-on-demand principle.
Dafür verwendete Digitaldruckmaschinen sind in mehreren Ausführungsformen bekannt. Zum einen gibt es Einzeldruckmaschinen (für mengenmäßig kleine Leistungsanforderungen), in denen jeweils ein Objekt eingespannt und digital bedruckt wird. Weiterhin gibt es Taktmaschinen, in denen mehrere Einzeldruckmaschinen nebeneinandergestellt und mehrere jeweils auf einer Station stehende Objekte gleichzeitig bedruckt werden. Bei solchen Taktmaschinen entspricht die Leistung der Gesamtmaschine dem Vielfachen der Einzelleistung einer einzelnen Station, die insbesondere jeweils mit Einzeldruckmaschinen ausgestattet sein können. Charakteristisch für Taktmaschinen ist der gleichzeitige Wechsel mehrerer zu bedruckender 3-dimensionaler Objekte in den einzelnen Stationen. Auch werden taktweise arbeitende Maschinen meist so konzipiert, dass die einzelnen zu bedruckenden Tinten oder Farben nacheinander in aufeinanderfolgenden Stationen gedruckt werden. In der Regel ist die Leistung einer solchen Taktmaschine durch die Geschwindigkeit eines Druckkopfes beschränkt, welche die Zeit für das Drucken auf einem 3-dimensionalen Objekt vorgibt. Diese Zeit bestimmt die Taktzeit maßgeblich.Used for digital printing machines are known in several embodiments. On the one hand, there are individual printing machines (for small quantities in terms of volume), in each of which an object is clamped and digitally printed. Furthermore, there are clock machines in which several individual printing machines juxtaposed and several each standing on a station objects are printed simultaneously. In such cycle machines, the performance of the overall machine corresponds to the multiple of the individual output of a single station, which in particular can each be equipped with individual printing machines. Characteristic of clock machines is the simultaneous change of several to be printed 3-dimensional objects in the individual stations. In addition, cyclically operating machines are usually designed in such a way that the individual inks or colors to be printed are printed successively in successive stations. Typically, the performance of such a cycle machine is limited by the speed of a printhead, which dictates the time for printing on a 3-dimensional object. This time determines the cycle time significantly.
Daneben gibt es auch Lösungen, die erheblich höhere (mengenmäßige) Leistungen als Taktmaschinen ermöglichen. Dafür sind zwei Ausführungsformen bekannt. Die eine gruppiert komplette Einzeldruckmaschinen, bei denen der komplette Druck auf einer Station erfolgt, nebeneinander auf einem Karussell, die andere vervielfältigt die Leistung einer oder mehrerer Farben durch mehrere Einzeldruckstationen je Farben auf jeweils einem separaten Karussell. Derartige Maschinen werden auch aus Karussellmaschinen bezeichnet, bei denen der (an sich getaktete Druck) in Einzelmaschinen eines sich drehenden Karussells erfolgt. Dies ermöglicht eine kontinuierliche Behandlung der zu bedruckenden 3-dimensionalen Körper.In addition, there are also solutions that enable significantly higher (quantitative) performance than clocking machines. For this, two embodiments are known. The one grouped complete single printing machines, where the complete printing is done on one station, side by side on a carousel, the other multiplies the performance of one or more colors by several individual printing stations per color on a separate carousel. Such machines are also referred to as carousel machines, in which the (in itself clocked pressure) takes place in individual machines of a rotating carousel. This allows a continuous treatment of the 3-dimensional body to be printed.
Allen Lösungen gemeinsam ist, dass der Druck eines Logos oder eines Sicherheitsmerkmals mittels Spezialtinten nicht oder nur eingeschränkt möglich ist, weil diese Spezialtinten meist nicht für ein Drucken mittels Tintenstrahldruckköpfen geeignet sind.All solutions have in common that the printing of a logo or a security feature using special inks is not or only to a limited extent possible because these specialty inks are usually not suitable for printing by means of inkjet printheads.
Häufig ist auf solchen Dekorationen dennoch ein solcher Aufdruck notwendig, der mittels Sondertinten zu erfolgen hat, wie z.B. das Aufbringen eines Pfandlogos bei Einwegbehältern für Getränke in Deutschland. Solche Tinten sind in der Regel Sicherheitstinten, die eine Fälschungssicherheit garantieren und auf Grund ihres Aufbaus nicht zur Verarbeitung in Tintenstrahldruckköpfen geeignet sind. Solche Drucke sind in der Regel auf dem Bauchumfang eines 3-dimensionalen Objekts angebracht, wie z.B. einer Flasche oder Dose als Einwegbehälter, da sie unverlierbar sein müssen. Solche Logos oder Sonderaufdrucke sind in der Regel standardisiert und unterliegen im Gegensatz zum Digitaldruck, der für variable Daten und Dekore ausgelegt ist, keiner häufigen Veränderung im Druckdesign.Often, however, such imprints are required on such decorations, which must be done by means of special inks, e.g. the application of a deposit logo for disposable containers for drinks in Germany. Such inks are typically security inks that are anti-counterfeiting and, due to their nature, are not suitable for use in inkjet printheads. Such prints are typically applied to the waist circumference of a 3-dimensional object, such as a garment. a bottle or can as a disposable container, since they must be captive. Such logos or special imprints are generally standardized and, unlike digital printing, which is designed for variable data and decors, are not subject to frequent changes in print design.
Die Frage nach einer Lösung für 3-dimensionale Objekte, die digital dekoriert werden, hat sich wegen der bisherigen Nutzung von Etiketten oder Sleeves, die im Offsetdruck, Tiefdruck oder Flexodruck hergestellt werden, nicht gestellt. Dennoch kann es erforderlich sein, grundsätzlich digital dekorierte bzw. bedruckte 3-dimensionale Objekte ergänzend mit einem Aufdruck zu versehen, der den Einsatz nicht-tintenstrahldruckfähiger Druckfarben erfordert.The question of a solution for 3-dimensional objects, which are digitally decorated, has not been raised because of the previous use of labels or sleeves, which are produced in offset printing, gravure printing or flexographic printing. Nevertheless, it may be necessary to provide basically digitally decorated or printed 3-dimensional objects with an additional print, which requires the use of non-inkjetdruckfähiger inks.
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Die Aufgabe der vorliegenden Erfindung besteht also darin, eine Möglichkeit vorzuschlagen, solche in hohen Stückzahlen digital dekorierte Objekte mit Aufdrucken zu versehen, die nicht-tintenstrahldruckfähige Druckfarben erfordern.The object of the present invention is therefore to propose a possibility to provide such digitally decorated objects in large numbers with imprints that require non-inkjetdruckfähige printing inks.
Bei einer eingangs genannten Druckmaschine wird diese Aufgabe mit den Merkmalen des Anspruchs 1 gelöst. Dabei ist insbesondere vorgesehen, dass die Druckmaschine mindestens ein Druckwerk mit mindestens einem Stempel zum Bedrucken des 3-dimensionalen Objekts mittels eines als Stempeldruck ausgeführten separaten Drucks einer Markierung oder eines Logos aufweist. Erfindungsgemäß wird also vorgeschlagen, solche Drucke oder Logos, für die eine Sondertinte notwendig ist, durch einen Stempeldruck aufzubringen. Es wird also ein Stempeldruck in Kombination mit Digitaldruck vorgeschlagen. Mit einer solchen komplexen Lösung ist es möglich, nicht nur die hohen geforderten Stückzahlen von bis zu 20 Stempeldrucken pro Sekunde zu erreichen, sondern auch einen maßhaltigen, qualitativ hochwertigen Aufdruck zu erreichen. Das Übertragen der Sonderfarbe auf das Objekt mittels Stempeldruck unterliegt nicht den Beschränkungen bezüglich Pigmentgröße oder anderen Kriterien für Tinten für Digitaldruckköpfe.In a printing press mentioned above, this object is achieved with the features of
Entsprechend ist erfindungsgemäß in dem Druckwerk auch eine Farbauftragseinrichtung vorgesehen, mit der die Druckfarbe auf den Stempel aufbracht wird bzw. aufbringbar ist. Bei einem klassischen Stempel mit einer erhaben, formstabilen Druckform, welche das zu druckende Motiv bildet, kann die Farbauftragseinrichtung ein Stempelkissen sein, auf das der Stempel gedrückt wird, um die Druckfarbe aufzunehmen. Alternativ kommt auch eine angesteuerte Farbauftragswalze in Betracht. Mit beiden Lösungen lässt sich die Druckfarbe mit der für die hohen Stückzahlen erforderlichen Geschwindigkeit aufbringen.Accordingly, according to the invention in the printing unit also an inking device is provided, with which the ink is applied to the stamp or can be applied. In a classic stamp with a raised, dimensionally stable printing form, which forms the motif to be printed, the inking device may be an ink pad on which the stamp is pressed to receive the ink. Alternatively, a controlled inking roller comes into consideration. With both solutions, the printing ink can be applied at the speed required for high volumes.
Die Begriffe "Stempel" und "Stempeldruck" im Rahmen dieser Beschreibung schließen neben einem klassischen Stempel bzw. Stempeldruck auch die Begriffe "Tampon" und "Tampondruck" mit ein. Während ein Stempel im klassischen Sinne eine erhabene, formstabile Druckform mit dem zu druckenden Motiv bildet, die für den Farbauftrag auf ein Stempelkissen aufgerückt wird und dabei entsprechend der erhabenen Druckform die Druckfarbe aufnimmt, ist ein Tampon ein elastischer Druckkörper, der für den Farbauftrag auf ein mit der Druckfarbe gefülltes Klischee (im Sinne einer Matrize) aufgesetzt wird, in dem das zu druckende Motiv eine mit der Druckfarbe gefüllte Vertiefung bildet. Beim Aufsetzen des Tampons auf das Klischee nimmt der Tampon im Bereich des zu druckenden Motivs die Druckfarbe auf. Sowohl der Stempel als auch der Tampon werden anschließend auf die Oberfläche des zu bedruckenden Objekts gedrückt, um dort das gewünschte Motiv abzubilden. Der Tampon hat dabei den Vorteil, dass er sich der aufgrund seiner Elastizität der Form des zu bedruckenden Objekts besser anpasst. Das Prinzip des Drucks ist grundsätzlich insofern gleich, als auf dem Stempel bzw. Tampon ein dem zu druckenden Motiv entsprechender Farbaufdruck aufgebracht und abschließend auf die Oberfläche des zu bedruckenden Objekts übertragen wird. Dieses Druckprinzip wird im Rahmen der vorliegenden Offenbarung als Stempeldruck mit einem Stempel bezeichnet und schließt sowohl den Druck mit einem Stempel im klassischen Sinne als auch mit einem Tampon ein.The terms "stamp" and "stamp printing" in the context of this description include in addition to a classic stamp or stamp printing and the terms "tampon" and "pad printing" with a. While a stamp in the classical sense forms a raised, dimensionally stable printing forme with the motif to be printed, which is moved to an ink pad for the ink application while receiving the ink according to the raised printing form, a tampon is an elastic pressure body, for the paint on a cliché filled with the ink (in the sense of a die) is placed, in which the motif to be printed forms a depression filled with the printing ink. When placing the tampon on the cliché takes the tampon in the area of the motif to be printed on the ink. Both the stamp and the tampon are then pressed onto the surface of the object to be printed in order to image the desired motif there. The tampon has the The advantage that it adapts better due to its elasticity of the shape of the object to be printed. The principle of the printing is basically the same insofar as on the stamp or tampon applied to the motif to be printed corresponding color imprint and is finally transferred to the surface of the object to be printed. This printing principle is referred to in the context of the present disclosure as a stamp printing with a stamp and includes both the pressure with a stamp in the classical sense as well as with a tampon.
Bei dem Tampondruck ist die Farbauftragseinrichtung entsprechend als Matrize (Klischee) mit einer Fülleinrichtung ausgebildet, wobei die Fülleinrichtung die das zu druckende Motiv darstellende Vertiefung mit der Druckfarbe füllt und den nicht vertieften Bereich der Matrize druckfarbenfrei hält. Dazu kann bspw. eine Farbauftragswalze der Fülleinrichtung mit der Druckfarbe über die Matrize gerollt werden und die nicht in die Vertiefungen aufgenommene Farbe mit einem Schaber von der Oberfläche der Matrize abgestreift werden. Entsprechend kann die Fülleinrichtung dazu die Farbauftragswalze und den Schaber aufweisen, die nacheinander über die Matrize führbar ausgebildet sind und so die Druckfarbe nur in die Vertiefungen der Matrize eintragen.In the pad printing, the inking device is correspondingly designed as a die (cliché) with a filling device, wherein the filling device fills the recess representing the motif to be printed with the ink and keeps the non-recessed region of the die free of ink. For this purpose, for example, an inking roller of the filling device with the printing ink can be rolled over the die and the ink not absorbed in the depressions can be scraped off the surface of the die with a scraper. Correspondingly, the filling device for this purpose may comprise the inking roller and the scraper, which are designed so as to be executable successively over the matrix and thus register the printing ink only in the recesses of the matrix.
Die Druckmaschine ist für den Stempeldruck dazu eingerichtet, das 3-dimensionale Objekt mittels Stellantrieben so vor dem Stempel auszurichten, dass der Druck an einer vorbestimmten Stelle des 3-dimensionalen Objekts erfolgt. Dazu kann vorgesehen sein, dass die Stellantriebe dazu eingerichtet sind, das zu bedruckende 3-dimensionale Objekt vor dem Stempel zu positionieren. Die vorgeschlagenen Stellantriebe können Einstellmöglichkeiten für alle Achsen aufweisen, so dass das 3-dimensionale Objekt in Ausrichtung, Position und/oder Höhe frei vor dem Stempel des Druckwerks anordenbar ist. Die Positionierung erfolgt also so, dass der Stempeldruck an der vorherbestimmten Stelle auf der Oberfläche des 3-dimensionalen Objekts erfolgt.The printing press is designed for stamp printing to align the 3-dimensional object by means of actuators in front of the stamp so that the pressure takes place at a predetermined location of the 3-dimensional object. For this purpose, it can be provided that the actuators are set up to position the 3-dimensional object to be printed in front of the stamp. The proposed actuators can have adjustment options for all axes, so that the 3-dimensional object in alignment, position and / or height can be arranged freely in front of the stamp of the printing unit. The positioning thus takes place in such a way that the stamping pressure takes place at the predetermined location on the surface of the 3-dimensional object.
Vorzugsweise wirken die Stellantriebe mit dem Drehteller zusammen, auf dem das 3-dimensionle Objekt bei dem digitalen Bedrucken mit dem mindestens einen Tintenstrahldruckkopf aufgenommen ist. Die Stellantriebe können dazu ausgebildet sein, den Drehteller direkt axial nach oben und unten zu verschieben und zu drehen. In dieser Ausführungsform ist also der Drehteller dazu ausgebildet ist, das Objekt für den Stempeldruck vor dem Stempel zu platzieren. Ggf. kann ein Stellantrieb auch eine radiale Verstellung der Achse des Drehtellers durchführen.Preferably, the actuators cooperate with the turntable on which the 3-dimensional object is received in the digital printing with the at least one inkjet printhead. The actuators can be designed to move the turntable directly axially up and down and rotate. In this embodiment, therefore, the turntable is designed to place the object for the stamp printing in front of the stamp. Possibly. an actuator can also perform a radial adjustment of the axis of the turntable.
Zum Durchführen des Drucks weist das Druckwerk eine mechanische Zustelleinheit auf, welche dazu eingerichtet ist, den Stempel nach einem auslösenden Signal auf das 3-dimensionale Objekt aufzudrucken. Dies ist eine einfach zu realisierende Bauform für das Druckwerk, die im Bereich der Tintenstrahldruckköpfe nur wenig Platzbedarf aufweist und deshalb besonders gut mit den Einrichtungen zum digitalen Bedrucken in einer Druckstation kombiniert werden kann.To perform the printing, the printing unit has a mechanical feed unit, which is adapted to print the stamp on the triggering signal on the 3-dimensional object. This is an easy-to-implement design for the printing unit, which has little space in the field of inkjet printheads and therefore can be particularly well combined with the facilities for digital printing in a printing station.
In einer besonders bevorzugten Weiterentwicklung kann die mechanische Zustelleinheit eine insbesondere als verstellbarer Zylinder ausgebildete, d.h. linear verstellende, Mechanik aufweisen, welche den Stempel auf die Oberfläche des 3-dimensionalen Objekts drückt.In a particularly preferred further development, the mechanical feed unit can be a, in particular designed as an adjustable cylinder, i. linearly adjusting, have mechanics that presses the stamp on the surface of the 3-dimensional object.
Eine Alternative zu einem Verstellzylinder als Zustelleinheit bildet das erfindungsgemäß vorgesehene rotierende Rad, auf dessen Umfangsrand der Stempel derart montiert ist, dass der Stempel während der Rotation des Rades die Oberfläche des 3-dimensionalen Objekts berührt und dabei den Stempeldruck durchführt. Während der Rotation kann der Stempel auch an einer geeignet ausgebildeten Farbauftragseinrichtung vorbeidrehen, so dass der Stempel während des Vorbeidrehens mit der Druckfarbe beaufschlagt wird.An alternative to an adjusting cylinder as a delivery unit forms the inventively provided rotating wheel on the peripheral edge of the stamp is mounted such that the punch during the rotation of the wheel touches the surface of the 3-dimensional object and thereby performs the stamping pressure. During the rotation of the stamp can also rotate past a suitably trained inking device, so that the stamp is applied during the Vorbeidrehens with the ink.
Dabei weist das Druckwerk mehrere Stempel auf, die auf einem drehbaren Rad am Umfangsrand dieses Rades angeordnet sind, wobei das Rad dazu angeordnet und eingerichtet ist, an den zu bedruckenden 3-dimensionalen Objekten in der Druckmaschine so vorbei zu rotieren, dass die Stempel die Oberfläche der zu bedruckenden Gegenstände berühren. Auf diese Weise lässt sich ein kontinuierlicher Ablauf erreichen, indem jeder Stempel ein oder mehrere Objekte bedruckt. Indem die nacheinander angeordneten Stempel verschiedene Druckfarben aufweisen, lässt sich ggf. auch zwei- oder mehrfarbiger Druck erreichen. Ein Stempel auf dem rotierenden Rad bedruckt jeweils das Objekt, das sich gerade an der Druckposition in der Druckmaschine befindet, an welcher der Stempel vorbei rotiert. Ggf. ist es so auch möglich, eine Druckmaschine mit kontinuierlich transportierten Objekten für einen (quasi) kontinuierlichen Stempeldruck vorzusehen, indem die Objekte nacheinander durch die auf dem Rad angeordneten Stempel bedruckt werden.In this case, the printing unit has a plurality of punches, which are arranged on a rotatable wheel at the peripheral edge of this wheel, wherein the wheel is arranged and arranged to rotate past the to be printed 3-dimensional objects in the printing press over so that the stamp the surface touch the objects to be printed. In this way, a continuous process can be achieved by each stamp imprinting one or more objects. By the successively arranged stamps have different inks, if necessary, two- or multi-color printing can be achieved. A stamp on the rotating wheel prints in each case the object that is currently at the printing position in the printing press on which the stamp rotates past. Possibly. It is thus also possible to provide a printing press with continuously transported objects for a (quasi) continuous stamping printing by successively printing the objects through the stamp arranged on the wheel.
Erfindungsgemäß ist die Druckmaschine vorzugsweise dazu eingerichtet, den Stempeldruck nach Durchführen des digitalen Bedruckens durchzuführen, so dass der Stempeldruck grundsätzlich auch auf bereits digital bedruckte Oberflächen erfolgen kann bzw. erfolgt. Einzeldruckmaschinen oder Stationen von Druckmaschinen mit mehreren Einzeldruckmaschinen, die jeweils mindestens einen Tintenstrahldruckkopf und ein Druckwerk mit einem Stempel aufweisen, sind in diesem Sinne vorzugsweise dazu eingerichtet, zunächst den Digitaldruck auszuführen und nach diesem zusätzlich einen Stempeldruck (auch im Sinne: Tampondruck) aufzubringen. Dazu wird das 3-dimensionale Objekt, ohne es aus einer Ein-/Aufspannung bspw. auf einem Drehteller zu nehmen, mittels geeigneter Verstelleinrichtungen, wie z.B. Servomotoren, so vor dem Stempel ausgerichtet, dass der Stempeldruck an eine vorgesehene Stelle aufgebracht werden kann. Der Stempel kann dabei erfindungsgemäß bei einer Einzeldruckmaschine mittels einer Mechanik, z.B. durch einen verstellbaren Zylinder, auf die Objektoberfläche gedrückt und so ein entsprechender Abdruck erzeugt werden.According to the invention, the printing press is preferably set up to perform the stamp printing after the digital printing has been carried out, so that the stamp printing can in principle also take place on already digitally printed surfaces. Single-printing machines or stations of printing machines with a plurality of individual printing machines, each having at least one ink-jet printhead and a printing unit with a stamp are in this sense preferably adapted to first perform the digital printing and after this additionally apply a stamping (also in the sense: pad printing). For this purpose, the 3-dimensional object, without taking it from a on / clamping eg. On a turntable, aligned by means of suitable adjustment, such as servomotors, so in front of the stamp that the stamping pressure can be applied to a designated location. The stamp can thereby according to the invention in a single-printing machine by means of a mechanism, for example by an adjustable cylinder, pressed onto the object surface and so a corresponding impression can be generated.
Gemäß der Erfindung ist die Druckmaschine als Karussellmaschine mit mehreren Druckstationen ausgebildet, welche am äußeren Umfangsrand eines Maschinenrads, d.h. auf dem Maschinenrad mitdrehend, in einem vorgegeneben Bogenmaß vorzugsweise äquidistant angeordnet sind und jeweils als Einzeldruckmaschine zum digitalen Bedrucken von 3-dimensionalen Objekten mit mindestens einem Tintenstrahldruckkopf oder mehreren Tintenstrahldruckköpfen und einem Drehteller zur Aufnahme des 3-dimensionalen Objekts ausgebildet sind, wobei das Maschinenrad mit den Druckstationen während des Bedruckens der 3-dimensionalen Objekte in jeweils einer vorzugsweise konstanten, vorgegebenen Umfangsgeschwindigkeit rotiert.According to the invention, the printing machine is designed as a carousel machine with a plurality of printing stations, which at the outer peripheral edge of a machine wheel, i. on the machine wheel co-rotating, are preferably arranged equidistant in a vorvoreben Bogenmaß and are each designed as a single printing machine for digital printing of 3-dimensional objects with at least one inkjet printhead or more inkjet printheads and a turntable for receiving the 3-dimensional object, wherein the machine wheel with the Printing stations rotated during the printing of the 3-dimensional objects in each case a preferably constant, predetermined peripheral speed.
Eine Einzeldruckmaschine einer Druckstation zum digitalen Bedrucken von 3-dimensionalen Objekten an einer Druckstation der Druckmaschine entspricht also im Aufbau und der Funktion der im Oberbegriff beschriebenen Druckmaschine, wobei in die Karussellmaschine mehrere dieser Einzeldruckmaschinen an einem vorzugsweise kontinuierlich drehenden Maschinenrad aufweist. Die als Karussellmaschine ausgebildete Druckmaschine ist dazu eingerichtet, dass während der Rotation des Maschinenrads in einer oder jeder Einzeldruckmaschine das digitale Bedrucken des dreidimensionalen Objekts durchgeführt wird. Der digitale Druck erfolgt zwischen einer Einlaufeinrichtung, mit der das 3-dimensionale Objekt einer Einzeldruckmaschine der Druckmaschine zugeführt wird, und einer Auslaufeinrichtung, mit der das 3-dimensionale Objekt nach dem digitalen Druck wieder aus der Einzeldruckmaschine der Druckmaschine ausgeführt wird. Zwischen der Einlaufeinrichtung und der Auslaufeinrichtung erfolgt dann auch der Stempeldruck.A single-printing machine of a printing station for digital printing of 3-dimensional objects at a printing station of the printing press thus corresponds in structure and function of the printing machine described in the preamble, wherein in the carousel machine more of these individual printing machines on a preferably continuously rotating machine wheel. Trained as a carousel machine printing machine is adapted to that during the rotation of the machine wheel in one or each individual printing machine digital printing of the three-dimensional object is performed. The digital printing takes place between an inlet device, with which the 3-dimensional object is fed to a single-printing machine of the printing press, and a discharge device, with which the 3-dimensional object is again executed after digital printing from the single-printing machine of the printing press. The stamping pressure then takes place between the inlet device and the outlet device.
In einer Ausführungsform kann jede Einzeldruckmaschine an einer Druckstation der Druckmaschine ein vorbeschriebenes Druckwerk mit einem Stempel zum Bedrucken des 3-dimensionalen Objekts mittels Stempeldruck aufweisen.In one embodiment, each individual printing press at a printing station of the printing press may have a prescribed printing unit with a stamp for printing on the 3-dimensional object by means of stamp printing.
Insbesondere bei kontinuierlich laufenden Karussellmaschinen kann vorgesehen sein, auch den Stempeldruck kontinuierlich und nicht taktweise durch die beispielhaft bereits erwähnten vor- und zurückfahrenden mechanischen Stellsysteme auszubilden. Dies wird erfindungsgemäß dadurch erreicht, dass die Stempel auf dem drehbaren Rad des Druckwerks und die zu bedruckenden Oberflächen der in den Druckstationen der Karussellmaschine aufgenommenen 3-dimensionalen Objekte auf dem Maschinenrad mit demselben Bogenmaß, d.h. einem identischen oder ähnlichen Bogenmaß mit vorzugsweise weniger als 10% Abweichung, angeordnet sind und sich mit derselben Umfangsgeschwindigkeit, insbesondere einer identischen oder ähnlichen Umfangsgeschwindigkeit, vorzugsweise weniger als 10% Abweichung, bewegen, so dass die nacheinander angeordneten Stempel auf dem rotierenden Rad die in jeweils am Umfangsrand in aufeinanderfolgenden Druckstationen angeordneten 3-dimensionalen Objekte mittels Stempeldruck bei der Berührung der Oberfläche der 3-dimensionalen Objekte durch die Stempel bedrucken. Da sich die Stempel auf dem drehbaren Rad mit derselben Umfangsgeschwindigkeit wie das Maschinenrad der Karussellmaschine bewegen, werden die 3-dimensionalen Objekte in den Einzeldruckmaschinen der Druckstationen der Karussellmaschine also nacheinander von jeweils dem nächsten Stempel bedruckt.In particular, in continuously running carousel machines can be provided to form the stamping pressure continuously and not intermittently by the example already mentioned back and forth mechanical actuating systems. This is inventively achieved in that the stamp on the rotatable wheel of the printing unit and the surfaces to be printed recorded in the printing stations of the carousel machine 3-dimensional objects on the machine wheel with the same radians, i. an identical or similar radian measure with preferably less than 10% deviation, are arranged and move at the same peripheral speed, in particular an identical or similar peripheral speed, preferably less than 10% deviation, so that the successively arranged stamp on the rotating wheel in each printing on the peripheral edge in successive printing stations 3-dimensional objects by means of stamp printing when touching the surface of the 3-dimensional objects by the stamp. Since the punches move on the rotatable wheel at the same circumferential speed as the machine wheel of the carousel machine, the three-dimensional objects in the individual printing machines of the printing stations of the carousel machine are thus printed one after the other by the next stamp.
Erfindungsgemäß wird also vorgeschlagen, dass am Hüllkreis der Außenkontur der zu bedruckenden Oberfläche zahnradartig ein anderes Rad angeordnet wird, das mit gleicher oder nahezu gleicher Umfangsgeschwindigkeit wie das Karussell betrieben wird. Der Antrieb wird also mit dem Karussell synchronisiert. Auf diesem Rad sind erfindungsgemäß die mehreren Stempel angeordnet, die in der gleichen oder nahezu gleichen Teilung wie die zu bedruckenden Objekte am Umfang des Karussells in den Druckstationen angeordnet sind. Dieses Rad mit den Stempeln wird entweder so mit der Digitaldruckmaschine verbunden oder so an die Digitaldruckmaschine herangeschoben, dass die Stempel die Oberfläche der 3-dimensionalen Objekte zum Bedrucken ausreichend berühren, um den Stempeldruck durchzuführen.According to the invention, it is therefore proposed that a gearwheel-like other gear is arranged on the outer circle of the outer surface of the surface to be printed, which is operated at the same or almost the same peripheral speed as the carousel. The drive is thus synchronized with the carousel. On this wheel, the multiple stamps are arranged according to the invention, the are arranged in the same or almost equal pitch as the objects to be printed on the circumference of the carousel in the printing stations. This wheel with the punches is either connected to the digital press or pushed so to the digital press, that the stamps touch the surface of the 3-dimensional objects for printing sufficiently to perform the stamp printing.
Idealerweise hat das Rad dasselbe Bogenmaß zwischen den Stempeln oder Tampons, wie die Objekte auf der Digitaldruckmaschine. Dies würde aber bei unterschiedlich großen zu bedruckenden Hüllkreisen der zu bedruckenden 3-dimensionalen Objekte, die dann entstehen, wenn z.B. Objekte unterschiedlichen Durchmessers an ihrer Außenseite zu bestempeln sind, zu unterschiedlichen Bogenmaßen führen. Dieses unterschiedliche Bogenmaß könnte erfindungsgemäß durch entsprechende Formatteile für jeden Objektdurchmesser ausgleichbar sein. Der Einbau und die Justage solcher Formateile sind jedoch aufwendig.Ideally, the wheel has the same radians between the punches or tampons as the objects on the digital press. However, this would be the case with differently sized enveloping circles to be printed on the 3-dimensional objects to be printed, which arise when e.g. To stamp objects of different diameters on their outside are lead to different sheet dimensions. This different radians could be compensated according to the invention by appropriate format parts for each object diameter. However, the installation and adjustment of such formats are expensive.
Anstelle der Verwendung von Formatteilen wird gemäß einer besonders bevorzugten Weiterentwicklung daher vorgeschlagen, dass das Bogenmaß zwischen zwei aufeinanderfolgenden Stempeln zwischen einem minimalen Bogenmaß und einem maximalen Bogenmaß liegt, die sich zwischen zu bedruckenden Oberflächen der 3-dimensionalen Objekte in zwei aufeinanderfolgenden Einzeldruckmaschinen für 3-dimenionale Objekte minimaler Ausdehnung (minimales Bogenmaß) und für 3-dimenionale Objekte maximaler Ausdehnung (maximales Bogenmaß) ergeben. Vorzugsweise entspricht das Bogenmaß zwischen zwei aufeinanderfolgenden Stempeln genau dem Mittelmaß zwischen dem minimalen Bogenmaß und dem maximalen Bogenmaß. Stellt man dieses Bogenmaß als Teilung des Stempels ein, so wird bei kleinerem oder größerem Bogenmaß auf der Digitaldruckmaschine zwischen dem Stempel und der zu bedruckenden Objektoberfläche eine im nachfolgenden auch Schlupf genannte Relativbewegung auftreten, die je nach der Ausdehnung des 3-dimenionalen Objekts (größer oder kleiner als das Mittelmaß) einmal positiv und einmal negativ ist. Erfindungsgemäß wurde festgestellt, dass dieser Schlupf zu tolerieren ist, da er üblicher Weise ein Bruchteil der Druckbreite eines Logos im Stempeldruck beträgt. Dies wird nachfolgend anhand eines konkreten Zahlenbeispiels erläutert, ohne dass das beschriebene Konzept auf genau dieses konkrete Beispiel beschränkt sein soll.Therefore, instead of using format parts, it is proposed according to a particularly preferred further development that the radian measure between two successive punches be between a minimum radian measure and a maximum radian measure between three surfaces of the 3-dimensional objects to be imprinted in two successive individual 3-dimensional presses Objects of minimal extent (minimum radians) and for 3-dimensional objects of maximum extent (maximum radians). Preferably, the radians between two consecutive punches correspond exactly to the median between the minimum radians and the maximum radians. If one sets this radian measure as a division of the stamp, so is smaller or larger radians on the digital press between the stamp and the object surface to be printed in the following also called slip relative motion which is positive once and negative once, depending on the extent of the 3-dimensional object (greater or smaller than the median). According to the invention, it has been found that this slippage can be tolerated since it is usually a fraction of the printing width of a logo in the stamping printing. This will be explained below with reference to a concrete numerical example, without the concept described being restricted to precisely this specific example.
Das Bogenmaß einer Objektaußenkontur auf einer Druckmaschine mit 48 Stationen und 2,3 m Teilkreisdurchmesser schwankt bei Bedruckung von z.B. 3-dimensionalen Objekten mit 50 bis 100 mm Durchmesser zwischen 157,08 mm und 153,80 mm. Der Mittelwert beträgt daher 155,44 mm. Da ein typisches Logo im Stempeldruck (d.h. wie eingangs definiert im "klassischen" Stempeldruck oder im Tampondruck) eine Größe von ca. 9 mm Druckbreite hat, ist der zu bedruckende Weg daher 5,7% des Bogenmaßes.The radian measure of an object outline on a printing press with 48 stations and 2.3 m pitch diameter varies with printing on e.g. 3-dimensional objects with 50 to 100 mm diameter between 157.08 mm and 153.80 mm. The mean value is therefore 155.44 mm. Since a typical logo in stamp printing (i.e., as defined in the "classic" stamp printing or in pad printing) has a size of about 9 mm printing width, the path to be printed is therefore 5.7% of the radian measure.
Der Unterschied von der Bewegung des Mittelwerts auf dem Stempelrad (d.h. dem drehbaren Rad mit den mehreren Stempeln) und dem 3-dimensionalen Objekt auf der Karusselldruckmaschine während des Stempeldrucks beträgt daher ca. 5,7% der Differenz der beiden Bogenmaße bei 3-dimensionalen Objekten mit größtem und kleinstem Durchmesser, d.h. maximaler und minimaler Ausdehnung. Diese Bogenmaßdifferenz ergibt sich in dem Zahlenbeispiel absolut also zu ca. 1,63 mm und die ca. 5,7% davon sind 0,09 mm, also weniger als 1/10 mm. Diese Differenz kann erfindungsgemäß vernachlässigt werden, so dass es möglich ist, mit einer einzigen Teilung des drehbaren Rades mit den mehreren Stempeln (Stempelrad) alle unterschiedlichen Objektgrößen der 3-dimensionalen Objekte im Stempeldruck zu bedrucken.The difference between the movement of the average value on the punch wheel (ie, the rotatable wheel with the multiple punches) and the 3-dimensional object on the carousel printing machine during the stamping pressure is therefore approximately 5.7% of the difference of the two sheet dimensions in 3-dimensional objects with the largest and smallest diameter, ie maximum and minimum extent. This radian difference results in the numerical example in absolute terms therefore about 1.63 mm and the approximately 5.7% of which are 0.09 mm, that is less than 1/10 mm. This difference can be neglected according to the invention, so that it is possible to print with a single division of the rotatable wheel with the multiple punches (Stempelrad) all different object sizes of the 3-dimensional objects in the stamp printing.
Dennoch wird gemäß einer erfindungsgemäß Weiterentwicklung vorgeschlagen, den Schlupf zu verringern oder zu vermeiden. Dazu kann vorgesehen sein, dass die Stellantriebe zum Positionieren des zu bedruckenden 3-dimensionale Objekt vor dem Stempel dazu eingerichtet sind, das 3-dimensionale Objekt während des Stempeldrucks in oder entgegen der Richtung der zu bedruckenden Oberfläche des 3-dimensionalen Objekts, bei einer Karussellmaschine also in oder entgegen der Umfangsbewegungsrichtung des Maschinenrades der Karussellmaschine, zu bewegen. Hierdurch wird die Druckwegstrecke verlängert oder verkürzt und gleichzeitig bei vom Mittelwert abweichendem Objektdurchmesser der 3-dimensionalen Objekte eine Quasi-Abwälzbewegung wie bei Zahnrädern zwischen Stempel und zu bedruckender Oberfläche des 3-dimensionalen Objekts erreicht.Nevertheless, according to a further development according to the invention, it is proposed to reduce or avoid slippage. For this purpose, it can be provided that the actuators for positioning the to-be-printed 3-dimensional object in front of the stamp are adapted to the 3-dimensional object during stamp printing in or against the direction of the surface of the 3-dimensional object to be printed, in a carousel machine so in or against the circumferential direction of movement of the machine wheel of the carousel machine to move. As a result, the pressure travel path is lengthened or shortened and at the same time a quasi-rolling motion as in the case of toothed wheels between the punch and the surface of the 3-dimensional object to be printed is achieved when the object diameter of the 3-dimensional objects deviates from the mean value.
Dies kann erfindungsgemäß besonders einfach erreicht werden, indem die Stellantriebe zum Positionieren des zu bedruckenden 3-dimensionalen Objekts vor dem Stempel dazu eingerichtet sind, das 3-dimensionale Objekt während des Stempeldrucks durch Bestimmen von Richtung und Geschwindigkeit der Bewegung des 3-dimensionalen Objekts so zu bewegen, dass die Umfangsgeschwindigkeit der zu bedruckenden Oberfläche des 3-dimensionalen Objekts der Umfangsgeschwindigkeit der Stempel auf dem drehbaren Rad entspricht. Einfacher Weise kann dafür der Drehteller, auf dem das Objekt steht und der durch einen Servomotor oder anderen geeigneten, regelbaren Motor angetrieben wird, während des Stempeldrucks entsprechend gedreht werden, um die Druckwegstrecke zu verlängern oder zu verkürzen. Hierzu wird der Motor des Drehtellers, auf dem das 3-dimensionale Objekt steht, während des Stempeldrucks bzw. Stempeldruckvorgangs in oder gegen Umfangsrichtung gedreht. Damit wird die Umfangsgeschwindigkeit der zu bedruckenden Oberfläche des Objekts entweder erhöht (wenn in Umfangsdrehrichtung der Karussellmaschine gedreht wird) bzw. verlangsamt (wenn gegen die Umfangsdrehrichtung der Karussellmaschine gedreht wird). Damit ist erfindungsgemäß eine Möglichkeit gegeben, die Umfangsgeschwindigkeit von Stempel bzw. Tampon und zu bedruckender Oberfläche aneinander anzugleichen.According to the invention, this can be achieved particularly simply by arranging the actuators for positioning the 3-dimensional object to be printed in front of the stamp to the 3-dimensional object during the stamping printing by determining the direction and speed of the movement of the 3-dimensional object that the peripheral speed of the surface of the 3-dimensional object to be printed corresponds to the peripheral speed of the punches on the rotary wheel. In a simple way, the turntable on which the object stands and which is driven by a servomotor or other suitable controllable motor can be correspondingly rotated during the stamping pressure in order to lengthen or shorten the pressure path. For this purpose, the motor of the turntable, on which the 3-dimensional object stands, is rotated in or against the circumferential direction during the stamping or stamping operation. Thus, the peripheral speed of the surface to be printed of the object is either increased (when rotated in the circumferential direction of rotation of the carousel machine) or slowed down (when rotated against the circumferential direction of rotation of the carousel machine). Thus, according to the invention, there is a possibility of matching the circumferential speed of the stamp or tampon and the surface to be printed on each other.
Erfindungsgemäß kann zur Steuerung des digitalen Drucks und des Stempeldrucks eine Steuereinrichtung vorgesehen sein, welche die Komponenten der erfindungsgemäßen Druckmaschine in der beschriebenen Weise ansteuert. Dazu weist die Steuereinrichtung eine Prozessoreinrichtung auf, die insbesondere mittels geeigneter Programmcodemittel zur Ausführung der einzelnen Steuerschritte eingerichtet ist. Im Hinblick auf die vorbeschriebene Anwendung ist die Steuereinrichtung auch zur Ermittlung der Drehung des 3-dimensionalen Objekts entsprechend der beispielhalft beschriebenen Berechnung eingerichtet, die Umfangsgeschwindigkeit der zu bedruckenden Oberfläche des Objekts zu ermitteln und entsprechend einzustellen. Dazu ist auch die Ausdehnung des 3-dimensionalen Objekts bekannt, vorzugsweise durch eine entsprechende Eingabe und/oder Detektion mittels eines Sensors, bspw. einer Kamera.According to the invention, a control device can be provided for controlling the digital printing and the stamping pressure, which controls the components of the printing press according to the invention in the manner described. For this purpose, the control device has a processor device, which is set up in particular by means of suitable program code means for executing the individual control steps. In view of the above-described application, the control device is also set up to determine the rotation of the 3-dimensional object according to the calculation described by way of example, to determine the circumferential speed of the surface of the object to be printed and to set it accordingly. For this purpose, the extent of the 3-dimensional object is also known, preferably by a corresponding input and / or detection by means of a sensor, for example a camera.
Es gibt auch Druckmaschinen, die als eine Taktmaschine ausgebildet sind, bei welcher mehrere Drehteller in einem vorgegeneben Bogenmaß, vorzugsweise äquidistant, auf einem drehbaren Maschinenrad angeordnet sind und mehrere Druckstationen vor dem Außenumfang des Maschinenrads in einem dem vorgegeneben Bogenmaß der Drehteller entsprechenden Abstand so angeordnet sind, dass in einer Drehstellung des Maschinenrads jeweils ein Drehteller vor einer Druckstation angeordnet ist, wobei mehrere Druckstationen mindestens einen Tintenstrahldruckkopf zum digitalen Bedrucken aufweisen und mindestens eine Druckstation ein Druckwerk mit einem Stempel zum Ausführen des Stempeldrucks aufweist. Bei Taktmaschinen, bei denen mehrere Einzelstationen nebeneinander angeordnet sind, kann jede Station ihren eigenen Stempel aufweisen. Im Falle von Taktmaschinen, die verschiedene Farben im Digitaldruck nacheinander in verschiedenen Druckstationen aufbringen, wird vorgeschlagen, das Druckwerk für den Stempeldruck in einer der Druckstationen mit dem digitalen Farbdruck, vorzugweise der letzten Druckstation mit digitalem Farbdruck, oder in einer separaten Druckstation anzuordnen. Die separate Druckstation ist vorzugsweise den Druckstationen für den Digitaldruck nachgeordnet. In dieser Anordnung kann der Stempeldruck in einer Taktmaschine mit nur einem geringen zusätzlichen Zeitaufwand erfolgen.There are also printing machines, which are designed as a timing machine, in which a plurality of turntables in a vorvoreven radians, preferably equidistant, are arranged on a rotatable machine wheel and a plurality of printing stations in front of the outer periphery of the machine wheel in a vorvoreben the radians of the turntable corresponding distance are arranged in that, in each case, a turntable is arranged in front of a printing station in a rotational position of the machine wheel, wherein a plurality of printing stations have at least one inkjet print head for digital printing and at least one print station has a printing unit with a stamp for carrying out the stamping printing. In clock machines in which several individual stations are arranged side by side, each station can have its own stamp. In the case of cycle machines which apply different colors in digital printing successively in different printing stations, it is proposed that the printing unit for the stamp printing in one of the printing stations with the digital color printing, preferably the last printing station with digital color printing, or to arrange in a separate printing station. The separate printing station is preferably arranged downstream of the printing stations for digital printing. In this arrangement, the stamping can be done in a cycle machine with only a small additional time.
Denkbar und erfindungsgemäß vorteilhaft wäre es auch, die 3-dimensionalen Objekte nach Verlassen der Taktmaschine neu zu orientieren und anschließend nacheinander in einem Stempeldruckverfahren zu bedrucken, da der Stempeldruckvorgang im Vergleich zum Digitaldruck nur einen Bruchteil der Zeit (Bearbeitungs- bzw. Druckzeit) benötigt. Dies ist für den Fall besonders vorteilhaft, dass die Druckmaschine einen separaten Maschinenteil für den Digitaldruck und einen separaten Maschinenteil für den Stempeldruck aufweisen kann, bspw. weil in der Behandlungslinie Raum für eine derartige Anordnung ist. Dann kann diese Lösung besonders einfach in eine bestehende Anlage integriert werden und der Stempeldruck ergänzt werden, ohne die gewohnte Taktrate zu reduzieren. Ggf. können auch mehrere Stationen mit Stempeldruck entsprechend nacheinander in einer Taktmaschine angeordnet werden, um die gewünschte Taktrate zu erreichen.Conceivable and according to the invention, it would also be advantageous to reorient the 3-dimensional objects after leaving the cycle machine and subsequently to print them successively in a stamp printing process since the stamp printing process requires only a fraction of the time (processing or printing time) compared to digital printing. This is particularly advantageous in the event that the printing press can have a separate machine part for the digital printing and a separate machine part for the stamp printing, for example because there is room in the treatment line for such an arrangement. Then this solution can be integrated very easily into an existing system and the stamp printing can be supplemented without reducing the usual clock rate. Possibly. It is also possible to arrange a plurality of stations with stamp printing correspondingly one after the other in a cycle machine in order to achieve the desired clock rate.
Ein Druckwerk kann auch in einen Maschinenteil der Druckmaschine integriert sein, in dem sich die Tintenstrahldruckköpfe befinden. Erfindungsgemäß ist das Druckwerk in einen anderen Maschinenteil der Druckmaschine integriert, der von dem Maschinenteil mit den Tintenstrahldruckköpfen (9) verschieden ist. Dies ermöglicht es, den Stempeldruckvorgang entweder direkt im Anschluss an den Digitaldruckvorgang in dem Maschinenteil der Druckmaschine mit den Tintenstrahlköpfen selbst oder in einem nachgeschalteten Maschinenteil auszuführen und bspw. das gewünschte Logo mit dem Stempel aufzubringen. In dem zweiten Fall kann der Stempeldruck auch zeitlich entkoppelt von dem Digitaldruck erfolgen, ggf. sogar losgelöst von einer Karussellanordnung der Druckmaschine für den Digitaldruck. Mit anderen Worten können die 3-dimensionalen Objekte von dem einen Maschinenteil der Druckmaschine mit den Tintenstrahldruckköpfen durch einen geeigneten Transporteur zu einem anderen Maschinenteil mit dem Stempeldruckwerk verbracht werden.A printing unit can also be integrated into a machine part of the printing press in which the ink jet print heads are located. According to the invention, the printing unit is integrated in another machine part of the printing machine, which is different from the machine part with the ink jet print heads (9). This makes it possible to execute the stamp printing process either directly following the digital printing process in the machine part of the printing press with the inkjet heads themselves or in a downstream machine part and, for example, apply the desired logo with the stamp. In the second case, the stamp printing can also take place at a decoupled time from the digital printing, possibly even detached from a carousel arrangement of the printing press for digital printing. In other words, the 3-dimensional objects of the a machine part of the printing press with the inkjet printheads are transported by a suitable conveyor to another machine part with the stamp printing unit.
Aufgrund der flexiblen Gestaltungsmöglichkeit und der elastischen, sich der Form der zu bedruckenden Oberfläche des 3-dimensionalen Objekts (in den Grenzen der gegebenen Elastizität) anpassenden Form ist erfindungsgemäß besonders vorteilhaft, wenn das Druckwerk als Stempel einen Tampon im Sinne eines strukturlosen, elastischen Druckkörpers aufweist, der die Druckfarbe durch Aufdrücken auf eine Matrize, welche auch als Klischee bezeichnet wird, aufnimmt, in welcher eine dem Druckbild gewünschte, mit Druckfarbe gefüllte Vertiefung vorgesehen ist. So kann durch Auswechseln der Matrize auch das Motiv bzw. Logo des Stempeldrucks einfach gewechselt werden.Due to the flexible design possibility and the elastic, the form of the surface to be printed of the 3-dimensional object (within the limits of the given elasticity) adapting shape is particularly advantageous according to the invention when the printing unit has a tampon as a stamp in the sense of a structureless, elastic pressure body , which receives the ink by pressing on a die, which is also referred to as a cliché, in which a print image desired ink-filled depression is provided. Thus, by replacing the die and the motif or logo of the stamp printing can be easily changed.
Eine erfindungsgemäß bevorzugte Verwendung der Druckmaschine sieht einen Einsatz des Stempeldrucks für solche Aufdrucke vor, die nicht mit Tinten erreichbar sind, die in Tintenstrahldruckköpfen einsetzbar sind. Dies gilt insbesondere für Sicherheitsanwendungen, in denen die Echtheit des Aufdrucks durch bestimmte, insbesondere mit Sensoren berührungsfrei messbare Eigenschaften ermittelt wird. Für diesen Fall kann erfindungsgemäß vorgesehen sein, dass die Druckfarbe für den Stempeldruck eine Sicherheitstinte ist, die bezüglich der Pigmentgröße und/oder anderer Eigenschaften, wie dem Fließverhalten oder dgl., nicht in Tintenstrahldruckköpfen verarbeitbar ist.A preferred use of the printing machine according to the invention provides for the use of stamp printing for such prints which can not be achieved with inks which can be used in inkjet print heads. This applies in particular to security applications in which the authenticity of the imprint is determined by specific properties which can be measured without contact, in particular with sensors. For this case, it can be provided according to the invention that the printing ink for the stamp printing is a security ink which is not processable in ink jet print heads in terms of pigment size and / or other properties, such as flow behavior or the like.
Um das Aufbringen eines Stempeldrucks auf ein 3-dimensionales Objekt einfach ein- und auszuschalten kann neben einer direkten Ansteuerung des Stempels erfindungsgemäß auch vorgesehen werden, dass das Druckwerk eine Farbauftragseinrichtung mit einer ansteuerbaren Mechanik aufweist, welche dazu eingerichtet ist, die Farbauftragseinrichtung zurückzuziehen, wenn kein 3-dimenionales Objekt bedruckt werden soll. Dies kann bspw. vorgesehen werden, wenn sich kein 3-dimensionales Objekt in der Druckstation für den Stempeldruck befindet oder kein Druckbefehl für das spezielle 3-dimensionale Objekt in der Druckstation vorliegt. Damit wird erfindungsgemäß also vorgeschlagen, den Stempel nur dann mit Druckfarbe zu versehen, wenn auch wirklich ein Druck abgesetzt werden soll. Immer dann, wenn sich entweder kein 3- dimensionales Objekt an der Druckposition für den Stempeldruck befindet oder ein solches Objekt aus welchen Gründen auch immer nicht bedruckt werden soll, wird keine Druckfarbe auf den Stempel aufgetragen. Im Falle eines Tampons als Stempel kann die Farbauftragseinrichtung, welche die Matrize, von der ein Tampon die Farbe übernimmt, mit Druckfarbe versieht, kurzzeitig für die Farbübertragung mechanisch zurückgezogen werden, damit die Matrize ohne Farbe bleibt. Dazu reicht es eine Farbauftragswalze um einen kurzen Weg zurückzuziehen. Eine solche Bewegung ist mittels einer Kurvenscheibe oder über Servoantriebe technisch unproblematisch zu realisieren. Bei klassischen Stempeln entfällt die Matrizenwalze und die Farbwalze trägt direkt auf den Stempel auf. Hier gilt das vorbeschriebene Verfahren entsprechend genauso. Dann wird die Farbauftragswalze gegenüber dem klassischen Stempel, der keinen Farbauftrag bekommen soll, zurückgezogen.In order to simply switch on and off the application of a stamping print to a 3-dimensional object, in addition to a direct control of the stamp, it can also be provided according to the invention that the printing unit has an inking device with a controllable mechanism which is adapted to retract the inking device, if not 3-dimenional object to be printed. This can be provided, for example, if there is no 3-dimensional object in the printing station for the stamp printing or if there is no print command for the special 3-dimensional object in the printing station. Thus, according to the invention, therefore, it is proposed to provide the stamp with ink only when a pressure is to be actually released. Whenever either no 3-dimensional object is at the printing position for the stamp printing or such an object is not to be printed for whatever reason, no printing ink is applied to the stamp. In the case of a tampon as a stamp, the inking device, which provides the die, from which a tampon takes over the ink, with ink, are briefly retracted mechanically for color transfer, so that the die remains without color. For this purpose, it is sufficient to withdraw a paint roller to a short distance. Such a movement is technically unproblematic to realize by means of a cam or servo drives. For classic punches eliminates the die roller and the ink roller is applied directly to the stamp. Here, the method described above applies equally. Then the inking roller is withdrawn compared to the classic stamp, which should get no inking.
Weiterhin wird erfindungsgemäß vorgeschlagen, dass die Druckmaschine eine gemeinsame Trocknungs- und/oder Härtungseinrichtung aufweist, welche die für den Digitaldruck verwendete Drucktinte der Tintenstrahldruckköpfe und die verwendete Druckfarbe für den Stempeldruck gemeinsam härtet bzw. trocknet, z.B. durch UV-Licht. Die Stempelfarbe wird dann also zusammen mit der Digitaldrucktinte gehärtet bzw. getrocknet.It is further proposed according to the invention that the printing press has a common drying and / or curing device which cures or dries together, for example, the printing ink of the inkjet printing heads used for digital printing and the printing ink used for the stamp printing. by UV light. The stamping ink is then cured or dried together with the digital printing ink.
Weitere Vorteile, Merkmale und Anwendungsmöglichkeiten ergeben sich auch aus der nachfolgenden Beschreibung von Ausführungsbeispielen und der Zeichnung. Dabei bilden alle beschriebenen und/oder bildlich dargestellten Merkmale für sich oder in beliebiger Kombination den Gegenstand der vorliegenden Erfindung, auch unabhängig von ihrer Zusammenfassung in den Ansprüchen oder deren Rückbezügen.Further advantages, features and applications will become apparent from the following description of exemplary embodiments and the drawings. All described and / or illustrated features alone or in any combination form the subject matter of the present invention Invention, also independent of their summary in the claims or their back references.
Es zeigen:
- Fig 1.
- eine bekannte, als Einzeldruckmaschine ausgebildete Druckmaschine;
- Fig. 2
- eine als Karusselldruckmaschine ausgebildete Druckmaschine gemäß einer Ausführungsform der Erfindung, wobei an Druckstationen der Karusselldruckmaschine jeweils eine Einzeldruckmaschine gemäß
Fig. 1 angeordnet sein kann; und - Fig. 3
- eine bekannte, als Taktmaschine ausgebildete Druckmaschine mit feststehenden, nicht umlaufenden Druckköpfen und einer Druckstation für den Stempeldruck.
- Fig. 1
- a known, designed as a single printing press;
- Fig. 2
- a trained as a carousel printing press according to an embodiment of the invention, wherein at printing stations of the carousel printing press in each case a single-printing machine according to
Fig. 1 can be arranged; and - Fig. 3
- a known, trained as a cycle machine printing machine with fixed, non-rotating printheads and a printing station for the stamp printing.
In
Der Drehteller 8 mit Stellantrieb ist dazu ausgebildet, das 3-dimensionale Objekt 7 vor den Tintenstrahldruckköpfen 9 zu platzieren und um seine eigene Achse zu rotieren. Während der Rotation des 3-dimensionalen Objekts 7 vor einem Tintenstrahldruckkopf 9 wird die Oberfläche des 3-dimensionalen Objekts 7 in bekannter Weise digital bedruckt. Dazu werden während der Drehung des Objekts 7 bei Bedarf Tintentropfen auf die Oberfläche gespritzt (Drop-on-demand-Verfahren), so dass die einzelnen Tintentropfen auf der Oberfläche das gewünschte Druckbild ergeben. Bei mehrfarbigen Bildern druckt jeder Tintenstrahlkopf 9 seine Farbe auf einen Bildpunkt der Oberfläche. Mischfarben werden durch Aufeinanderdrucken verschiedener Farben erzeugt. In der dargestellten Anordnung befinden sich je zwei Tintenstrahldruckköpfe 9 in einer Rotationsebene. Ein Gesamtdruck in vier Farben wird in diesem Fall so erzeugt, dass der Drehteller das 3-dimensioale Objekt nacheinander in jeder der beiden Rotationsebenen vor den Tintenstrahldruckköpfen 9 positioniert und rotiert. Die Höhenverstellung ist durch die beiden Doppelpfeile in vertikaler Richtung angedeutet.The
Abweichend von einem solchen Aufbau ist es grundsätzlich auch möglich, die Tintenstrahldruckköpfe 9 so in einer Rotationsebene um das 3-dimensionale Objekt 7 verteilt anzuordnen, dass während der Rotation in dieser einen Rotationsebene alle Farben durch die Tintenstrahldruckköpfe auf die zu bedruckende Oberfläche des 3-dimensionalen Objekts 7 aufgedruckt werden.In contrast to such a structure, it is also possible in principle to arrange the
Die Druckmaschine 1 weist erfindungsgemäß ergänzend ein Druckwerk 22 mit einem Stempel 5 zum Bedrucken des 3-dimensionalen Objekts 7 mittels eines als Stempeldruck ausgeführten separaten Drucks einer Markierung oder eines Logos auf. Dazu wird das 3-dimensionale Objekt 7 mittels Stellantrieben so vor dem Stempel 5 ausgerichtet, dass der Druck an einer vorbestimmten Stelle des 3-dimensionalen Objekts 7 erfolgt, indem der Stempel 5 durch das Druckwerk 22 auf die Oberfläche des Objekts 7 aufgedrückt wird. Das Objekt befindet sich dazu weiterhin auf dem angetriebenen Drehteller 7, der entsprechend so vor dem Druckwerk 22 positioniert ist, dass der Stempel auf die gewünschte Position des 3-dimensionalen Objekts 7 aufgedrückt werden kann. Dies ist in
In dem Druckwerk 22 ist ferner eine Farbauftragseinrichtung 23 vorgesehen, mit der die Druckfarbe auf den Stempel 5 aufbracht wird. Bei dem in
Der erfindungsgemäße Ablauf des Bedruckens des 3-dimensionalen Objekts 7 in der Druckmaschine 1 kann dabei erfindungsgemäß derart ablaufen, dass ein zu bedruckendes Objekt 7 auf den Drehteller 8 der als Einzelstation ausgebildeten Druckstation 1 gesetzt und - in der Darstellung - nach oben gefahren und zwischen die Tintenstrahldruckköpfe 9 platziert wird. Durch Drehen des Drehtellers 8 wird die Oberfläche des 3-dimensionalen Objekts zum digitalen Bedrucken nach dem Drop-on-demand-Prinzip an den Tintenstrahldruckköpfen 9 vorbeigeführt. Nach dem digitalen Bedrucken wird das Objekt 7 auf dem Drehteller 8 mittels des Stellantriebs wieder abgesenkt.The inventive process of printing the 3-
Nach Absenken des Objekts 7, bspw. in die Ausgangsposition, in auch die Aufgabe des 3-dimensionalen Objekts 7 in die Druckmaschine 7 erfolgt, wird durch den Stellantrieb des Drehtellers 8 die zu bestempelnde Oberfläche des 3-dimensionlaen Objekts 7 vor den Stempel 5 gedreht und dieser durch seine nicht im Detail gezeichnete Mechanik auf das Objekt 7 gepresst. Der Stempel 5 wird anschließend auf das Stempelkissen 6 gedrückt um für den nächsten Stempelvorgang bereit zu sein. Alternativ kann dies auch jeweils vor einem Stempelvorgang erfolgen.After lowering the
Damit lässt sich der Digitaldruck erfindungsgemäß in einer einfachen Druckmaschine 1 mit dem Stempeldruck kombinieren. Erfindungsgemäß ist es auch möglich, das Druckwerk 22 in der Druckmaschine 1 in der Rotationsebene mit einem Teil der oder allen Tintenstrahldruckköpfen 9 anzuordnen.Thus, digital printing can be combined according to the invention in a
In
Die einzelnen Druckstationen mit den Einzeldruckmaschinen 1 sind jeweils am äußeren Umfangsrand eines Maschinenrads 24 mit dem Maschinenrad 24 mitdrehend und in einem vorgegeneben Bogenmaß 12 vorzugsweise äquidistant angeordnet. Der Einfachheit halber sind in der schematischen Darstellung gemäß
In bekannter Weise geschieht die Aufgabe der 3-dimensionalen Objekte 7 auf die Druckmaschine 3 mittels einer Einlaufsternwelle 19 als Einlaufeinrichtung. Entsprechend ist eine Auslaufsternwelle 20 als Auslaufeinrichtung vorgesehen, mit der die 3-dimensionalen Objekte 7 nach der Behandlung auf der Druckmaschine 3 wieder entnommen werden. Die Einlaufsternwelle 19 und die Auslaufsternwelle 20 sind tangential an dem Maschinenrad 24 der Druckmaschine 3 angeordnet und werden respektive über einen Objektzulauf 10 bzw. Objektauslauf 11 mit einem weiteren, nicht dargestellten Transportsystem für die 3-dimensionalen Objekte 7 verbunden.In a known manner, the task of the 3-
Der Ablauf der Behandlung ist wie folgt: Die 3-dimensionalen Objekte 7 fahren über die Einlaufsternwelle 19 auf das kontinuierlich drehende Karussell der Druckmaschine 3, auf dem in regelmäßiger Teilung die Stationen für die Einzeldruckmaschinen 1 mit Tintenstrahldruckköpfen 9 vorgesehen sind. In der Regel sind alle Einzeldruckmaschinen 1 montiert. Bei dem Einlauf der Objekte 7 aus der Einlaufsternwelle 19 werden die Objekte 7 in der Einzeldruckmaschine 1 auf den Drehteller 14 gestellt, die durch einen in
Anschließend werden die Objekte 7 wie bei der Ausführungsform gemäß
Gemäß einer ersten Ausgestaltung der Ausführungsform gemäß
Eine andere zweite Ausgestaltung des Stempeldrucks ist auch in
Dazu weist das Druckwerk 25 ein auch als Stempelrad bezeichnetes drehbares Rad 15 auf, auf dessen Umfangsrand mehrere Stempel 5 ausgebildet sind. Das drehbare Rad 15 ist dazu angeordnet und eingerichtet, an den zu bedruckenden 3-dimensionalen Objekten 7 in der Druckmaschine 3 so vorbei zu rotieren, dass die Stempel 7 die Oberfläche der zu bedruckenden Objekte 7 an der bezogen auf die Druckmaschine 3 radial nach außenweisen Position der Oberfläche berühren. Mit dem Maschinenrad 24 (Karussell) der Druckmaschine 3 dreht sich mit gleicher Umfangsgeschwindigkeit das drehbare Rad 15, wobei im Idealfall bei kontant gleicher Bogenlänge 12 (Bogenmaß) zwischen zwei zu bedruckenden 3-dimensionalen Objekten 7 in aufeinanderfolgenden Druckstationen zwei aufeinanderfolgende Stempel 5 auf dem Stempelrad 15 mit der gleichen Bogenlänge 13 (Bogenmaß) beabstandet sind. Dadurch ist im kontinuierlichen Betrieb der Druckmaschine 3, d.h. bei kontinuierlicher Drehung des Maschinenrads 24, ein Stempeldruck durchführbar.For this purpose, the
Die in der Druckmaschine 3 zu bedruckenden 3-dimensionalen Objekte 7 können eine unterschiedliche Ausdehnung haben, d.h. vom Zentrum des Drehtellers 14 unterschiedlich weit radial (bezogen auf die Druckmaschine 3) vorstehen. Ist das Objekt 7 größer als ein Mittelwert zwischen einer maximalen und einer minimalen Ausdehnung der auf der Druckmaschine 3 zu bedruckenden (verschiedenen) 3-dimensionalen Objekte 7, so sind dessen Bogenmaß 12 die Umfangsgeschwindigkeit etwas größer als das Bogenmaß 13 und die Umfangsgeschwindigkeit des Rades 15 (Stempelrad) mit den Stempeln. Dies kann in den meisten Fällen vernachlässigt werden, jedoch kann erfindungsgemäß vorgeschlagen werden, dies bei größeren Abweichungen mit dem Antrieb des Drehtellers 14 zu korrigieren, indem dieser entweder zur Verlangsamung gegen die Umfangsdrehrichtung des Karussells 3 gedreht wird oder für eine gewollte schnellere Umfangsgeschwindigkeit des Objekts 7 in Umfangsdrehrichtung gedreht wird. Dies wurde anhand eines Beispiels bereits erläutert.The 3-
In dem dargestellten Beispiel des Druckwerks 25 ist dieses mit den bereits erläuterten Tampons als Stempel 5 auf dem drehbaren Rad 15 (Stempelrad) ausgebildet. Diese Tampons erhalten ihre zu druckende Form (respektive das zu druckende Motiv) durch auch als Klischee bezeichnete Matrizen 21, die auf einem Matrizenrad 16 mit gleicher Teilung 13 angebracht sind und das zusammen mit dem drehbaren Rad 15 (Stempelrad) mit den Tampons angetrieben wird. Diese Matrizen 21 bekommen ihren Farbauftrag mit Druckfarbe durch eine Farbauftragswalze 17, die ebenfalls synchron mit dem Matrizenrad 16 und dem Stempelrad 15 angetrieben wird. Für den Fall, dass kein 3-dimenionales Objekt 7 mit dem Stempeldruck bedruckt werden soll, bspw. weil ein solches Objekt 7 in der entsprechenden Druckstation der Druckmaschine 3 fehlt oder weil kein Druckbefehl für das dort vorhandene Objekt 7 erfolgt, ist eine Mechanik 18 zum Zurückziehen der Farbauftragswalze 17 vorgesehen. Wenn kein Farbauftrag auf die Matrize 21 und/oder den Stempel 5 erfolgt, findet auch kein Stempeldruck auf das Objekt statt. Bei einem als klassischem Stempel ausgebildeten Stempel 5 fehlt das Matrizenrad 16 mit den Matrizen 21, da klassische Stempel die zu stempelnde Information in ihrem Design tragen.In the illustrated example of the
Im Falle des Fehlens eines Objekts 7 oder dem Befehl des Nichtbestempelns für ein Objekt 7 wird die Farbauftragswalze 17 für die Zeit, die es in Kontakt mit der entsprechenden Matrize 21 (oder dem Stempel 5 auf dem Stempelrad 15) wäre, also durch den Mechanismus der Mechanik 18 zurückgezogen, so dass die entsprechende Matrize 21 (oder der entsprechende Stempel 5) ohne Farbauftrag vorbeigedreht wird. Danach schwenkt die Farbauftragswalze 17 zurück für den Farbauftrag auf der nachfolgenden Matrize 21 oder den nachfolgenden Stempel 5, sofern diese(r) einen Farbauftrag bekommen soll.In the case of the absence of an
Beide Ausgestaltungen, d.h. die erste Ausgestaltung mit dem Druckwerk 22 und die zweite Ausgestaltung mit dem Druckwerk 25, die beide in
Schließlich zeigt
Bei einer taktweise arbeitenden Druckmaschine 4, bei der in jeder Druckstation ein anderer Prozessschritt, bspw. ein Druck oder ein nicht dargestellter Prozessschritt, wie z.B. eine Trocknung, stattfindet, sind auf den Objektzulauf 10 folgend mehrere nacheinander folgende Druckstationen mit den Tintenstrahldruckköpfen 9 gezeichnet, zu denen nacheinander die 3-dimensionalen Objekte 7 auf den Drehtellern des Maschinenrads 2 im Winkel α befördert werden. Nach Abschluss des digitalen Bedruckens wird dann das Objekt 7 über den Drehteller 14, auf dem es steht, so ausgerichtet, dass die zu bedruckende Stelle in der Druckstation vor den Stempel 5 des Druckwerks 22 wird positioniert. Ein Stempeldruck erfolgt mittels Stempel 5, bevor das Objekt in dem Objektauslauf 11 wieder von der Maschine 2 entnommen wird.In a cyclically operating printing machine 4, in which in each printing station another process step, for example, a pressure or a process step, not shown, such. a drying takes place, following the
Wie in der gesamten Beschreibung auch der verschiedenen Ausführungsbeispiele kann der Stempel 5 als klassischer Stempel für den klassischen Stempeldruck oder als Tampon für den Tampondruck ausgeführt sein.As in the entire description of the various embodiments, the
- 11
- Druckmaschinepress
- 22
- drehbares Maschinenradrotatable machine wheel
- 33
- Druckmaschinepress
- 44
- Druckmaschinepress
- 55
- Stempelstamp
- 66
- Stempelkisseninkpad
- 77
- als Flasche ausgebildetes 3-dimensionales Objektdesigned as a bottle 3-dimensional object
- 88th
- Drehteller mit StellantriebTurntable with actuator
- 99
- TintenstrahldruckkopfInkjet printhead
- 1010
- Objektzulaufobject feed
- 1111
- Objektauslaufobject outlet
- 1212
- Bogenmaß der Teilung am KarussellRadians of division at the carousel
- 1313
- Bogenmaß der Teilung am StempelradRadian of division at the stamp wheel
- 1414
- Drehtellerturntable
- 1515
- drehbares Radrotatable wheel
- 1616
- Matrizenraddie wheel
- 1717
- FarbauftragswalzeInking roller
- 1818
- Mechanik zum Zurückziehen der FarbauftragswalzeMechanism for retracting the inking roller
- 1919
- EinlaufsternwelleFeed star wave
- 2020
- AuslaufsternwelleOutlet star wave
- 2121
- Matrizedie
- 2222
- Druckwerkprinting unit
- 2323
- FarbauftragseinrichtungInking device
- 2424
- MaschinenradMaschinenrad
- 2525
- Druckwerkprinting unit
Claims (11)
- A printer for digitally printing on 3-dimensional objects (7) with at least one inkjet print head (9) and one rotary table (14) for accommodating the 3-dimensional object (7), wherein the rotary table (14) is designed for positioning the object (7) in front of the inkjet print head (9) and for rotating the object about its own axis in order to guide the surface of the 3-dimensional object (7) to be printed past the inkjet print head (9) for digital printing, wherein the printer (3) features at least one printing unit (25) with a stamp (5) for separately printing a sign or a logo on the 3-dimensional object (7) by means of a stamp-printing process, wherein the printer (3) is realized in the form of a carousel machine with multiple printing stations, which are arranged on the outer circumferential edge of a machine wheel (24) in a predefined radiant measure (12) and respectively feature at least one inkjet print head (9) and one rotary table (14) for accommodating the 3-dimensional objects (7) in order to digitally print on the 3-dimensional objects (7), and wherein the machine wheel (24) with the printing stations respectively rotates with a predefined circumferential speed while printing on the 3-dimensional objects (7), characterized in that the printing unit (25) features a mechanical adjusting unit that is designed for pressing the stamp (5) on the 3-dimensional object (7) in response to a trigger signal, wherein the printing unit (25) features multiple stamps (5) that are arranged on a rotatable wheel (15), wherein the rotatable wheel (15) is arranged and designed for rotating past the 3-dimensional objects (7) to be printed in the printer (3) such that the stamps (5) contact the surface of the 3-dimensional objects (7) to be printed, and wherein the stamps (5) are arranged on the rotatable wheel (15) of the printing unit (25) and the surfaces to be printed of the 3-dimensional objects (7) accommodated in the printing stations of the carousel machine are arranged on the machine wheel (24) with the same radiant measure (12, 13) and move with the same circumferential speed such that the successively arranged stamps (5) on the rotating wheel (15) print on the 3-dimensional objects (7), which are respectively arranged in successive printing stations on the circumferential edge, by means of a stamp-printing process.
- The printer according to claim 1, characterized in that actuators are provided and designed for positioning the 3-dimensional object (7) to be printed in front of the stamp (5).
- The printer according to claim 1 or 2, characterized in that the mechanical adjusting unit features a mechanism, which presses the stamp (5) on the surface of the 3-dimensional object (7).
- The printer according to one of the preceding claims, characterized in that the radiant measure (13) between two successive stamps (5) lies between a minimum radiant measure (12) and a maximum radiant measure (12), which result for 3-dimensional objects (7) of minimum extent and for 3-dimensional objects (7) of maximum extent between surfaces to be printed of the 3-dimensional objects (7) in two successive individual printers (1).
- The printer according to one of claims 2 and 4, characterized in that the actuators for positioning the 3-dimensional object (7) to be printed in front of the stamp (5) are designed for moving the 3-dimensional object (7) in or opposite to the direction of the surface to be printed of the 3-dimensional object (7) during the stamp-printing process.
- The printer according to claim 5, characterized in that the actuators for positioning the 3-dimensional object (7) to be printed in front of the stamp (5) are designed for moving the 3-dimensional object (7) during the stamp-printing process in such a way that the circumferential speed of the surface to be printed of the 3-dimensional object (7) corresponds to the circumferential speed of the stamps (5) on the rotatable wheel (15) by defining the direction and the speed of the movement of the 3-dimensional object (7).
- The printer according to one of the preceding claims, characterized in that the printing unit (25) features a stamp (5) in the form of a pad, which absorbs the printing ink by being pressed on a stencil (21) with a recess that corresponds to the desired print image and is filled with printing ink.
- The printer according to one of the preceding claims, characterized in that the printing unit (25) features an inking roller (17) for applying printing ink by means of a controllable mechanism (18), wherein the controllable mechanism (18) is designed for retracting the inking roller (17) when no 3-dimensional object (7) should be printed.
- The printer according to one of the preceding claims, characterized in that the printing unit (25) is integrated into another machine part of the printer (3), which differs from the machine part with the inkjet print heads (9).
- The printer according to one of the preceding claims, characterized in that the printing ink for the stamp-printing process is a security ink, which cannot be processed in inkjet print heads (9) with respect to the pigment size.
- The printer according to one of the preceding claims, characterized in that the printer (3) features a common drying and/or hardening device for the digital printing process and the stamp-printing process.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013015097 | 2013-09-13 | ||
PCT/EP2014/069551 WO2015036571A1 (en) | 2013-09-13 | 2014-09-12 | Printing press for printing three-dimensional objects |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3044004A1 EP3044004A1 (en) | 2016-07-20 |
EP3044004B1 true EP3044004B1 (en) | 2017-11-08 |
Family
ID=51535463
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14762041.3A Active EP3044004B1 (en) | 2013-09-13 | 2014-09-12 | Printer for printing on 3-dimensional objects |
Country Status (3)
Country | Link |
---|---|
US (1) | US9713927B2 (en) |
EP (1) | EP3044004B1 (en) |
WO (1) | WO2015036571A1 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018170411A1 (en) * | 2017-03-16 | 2018-09-20 | Igloo Products Corp. | Methods and systems for printing on a three-dimensional (3-d) object to achieve a 3-d effect |
US10214026B1 (en) * | 2017-08-11 | 2019-02-26 | Xerox Corporation | System and method for rotating a three-dimensional (3D) object during printing of the object |
EP3684626B1 (en) | 2017-09-19 | 2024-02-07 | Ball Corporation | Container decoration apparatus and method |
JP2019209612A (en) * | 2018-06-05 | 2019-12-12 | 東洋製罐株式会社 | Continuous printing system |
WO2019236102A1 (en) * | 2018-06-08 | 2019-12-12 | Hewlett-Packard Development Company, L.P. | Build material distributing cylinders |
CN109177506A (en) * | 2018-10-16 | 2019-01-11 | 广州市申发机电有限公司 | A kind of automatic color multi-station spiral ink-jet printing apparatus |
CN109107854A (en) * | 2018-10-17 | 2019-01-01 | 江苏创源电子有限公司 | A kind of coating drying equipment |
CN110978800A (en) * | 2020-01-08 | 2020-04-10 | 广州市申发机电有限公司 | Full-automatic digital ink-jet device |
DE102020132134A1 (en) | 2020-12-03 | 2022-06-09 | Krones Aktiengesellschaft | direct printing machine |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2938026C2 (en) * | 1979-09-20 | 1981-12-24 | Horray Kg, 7743 Furtwangen | Stamp device |
DE10226500B4 (en) * | 2002-06-14 | 2010-04-22 | Ball Packaging Europe Holding Gmbh & Co. Kg | Device for surface treatment of parts |
DE102007020635A1 (en) * | 2006-05-05 | 2007-11-08 | Scheller, Gudrun Charlotte | Identification system for especially drink bottles and cans has second identification as a concealed marking located beneath safety ring, and only after removing safety ring can correlation between first and second identification be decoded |
US8256854B2 (en) | 2006-08-16 | 2012-09-04 | Khs Gmbh | Method and apparatus for the circumferential printing onto individual bottles in a run of bottles where the individual bottles in the run have at least one varying dimension due to manufacturing tolerances, the method and apparatus providing more consistent artwork on individual containers in the run of containers |
EP2152519B2 (en) | 2007-08-03 | 2015-05-06 | KHS GmbH | Device and method for printing containers |
DE102013208061A1 (en) * | 2013-01-31 | 2013-07-04 | Krones Ag | Apparatus for printing e.g. content information on e.g. drink bottle, has UV lamp that is arranged on one of pressure plane to emit UV radiation for curing applied ink on containers |
-
2014
- 2014-09-12 WO PCT/EP2014/069551 patent/WO2015036571A1/en active Application Filing
- 2014-09-12 EP EP14762041.3A patent/EP3044004B1/en active Active
- 2014-09-12 US US15/021,713 patent/US9713927B2/en active Active
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
US20160221360A1 (en) | 2016-08-04 |
US9713927B2 (en) | 2017-07-25 |
EP3044004A1 (en) | 2016-07-20 |
WO2015036571A1 (en) | 2015-03-19 |
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