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EP2832546B1 - Imprimante dotée d'une commande de tête d'impression - Google Patents

Imprimante dotée d'une commande de tête d'impression Download PDF

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Publication number
EP2832546B1
EP2832546B1 EP14174073.8A EP14174073A EP2832546B1 EP 2832546 B1 EP2832546 B1 EP 2832546B1 EP 14174073 A EP14174073 A EP 14174073A EP 2832546 B1 EP2832546 B1 EP 2832546B1
Authority
EP
European Patent Office
Prior art keywords
module
print head
printing machine
printing
head module
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP14174073.8A
Other languages
German (de)
English (en)
Other versions
EP2832546A1 (fr
Inventor
Andreas Sonnauer
Andreas Kraus
August Peutl
Hartmut Davidson
Josef Knott
Viktor Gette
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Krones AG
Original Assignee
Krones AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Krones AG filed Critical Krones AG
Publication of EP2832546A1 publication Critical patent/EP2832546A1/fr
Application granted granted Critical
Publication of EP2832546B1 publication Critical patent/EP2832546B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F17/00—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for
    • 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
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/304—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface
    • 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

Definitions

  • the invention relates to a printing machine with movable print heads for printing on containers such as bottles.
  • alignment of the container is, for example, at a marking relative to the print head DE 10 2009 020 702 B4 known.
  • the container is aligned with respect to the printhead before printing in accordance with certain markings which are printed or attached to the container for more precise printing.
  • DE 102009033810 A1 a printing press in which a print head module can be aligned in all three spatial directions and at two angles with respect to the surface of a container to be printed by the print module.
  • the DE 102009041527 A1 shows a corresponding device.
  • the pressure module can be aligned with respect to a container clamped in a clamping device in order to be adapted to the surface contour of the container.
  • the EP 1435296 A1 also shows a printing press in which a printing unit can be aligned by means of a travel system in such a way that the ink jet strikes the surface of the container to be printed essentially perpendicularly.
  • the printing press comprises at least one conveyor and a printing unit with a print head module with at least one print head, a travel system for adjusting the position of the print head module, a measuring system for determining the position of the print head module and a control unit for controlling the travel system, wherein the Travel system includes a radial module for adjusting the position of the print module in the radial direction, a height module for adjusting the height of the print head module.
  • This printing machine allows a very precise adjustment of the print head module by means of the radial module and the height module provided.
  • a tilt module for setting the tilt of the print head module can be provided.
  • the printhead module can thus be aligned depending on the surface shape of the container to be printed.
  • the traversing system further comprises an alignment module for the vertical alignment of rows of nozzles of the printhead module in relation to the direction of transport of the containers to be printed. If the rows of nozzles are in relation to the transport direction of the
  • the radial module, the height module and the tilt module can be set independently of one another. This enables a misalignment of the printhead module to be corrected very precisely.
  • the radial module, the height module and the tilting module each comprise a motor, preferably a motor-spindle-nut drive.
  • the provision of individual motors for the individual modules also allows separate control here.
  • the printing press is characterized in that the printing unit comprises means for centering the printing unit on the printing press. If an exchange or a short removal of the printing unit from the printing machine should be provided, it can always be returned to the appropriate position, thus reducing the assembly effort.
  • the measuring system can measure the position of the print head module with an accuracy of ⁇ 0.5 mm, preferably ⁇ 0.1 mm, particularly preferably ⁇ 0.01 mm. This enables the printhead module to be positioned with very high accuracy, which enables printing of corresponding containers with likewise very high accuracy.
  • the printing unit is provided interchangeably.
  • control unit can adjust the position of the print head module with an accuracy of 0.5 mm, preferably 0.1 mm, particularly preferably 0.01 mm.
  • the positions or necessary changes in position obtained from the data of the measuring system can thus be carried out with corresponding accuracy.
  • the printing unit can also be assigned an ink tank connected to it via a line.
  • the entire printing unit can be provided in a modular manner. This means that few or no additional elements have to be provided for the printing unit in the printing press itself and that an exchange is particularly easy.
  • control unit can adjust the position of the printhead module as a function of the data that can be transmitted from the measuring system to the control unit. Due to the precise measurement of the position of the printhead module by the Measurement system, this can result in a very precise position adjustment of the printhead module.
  • the radial module, the height module and the tilt module comprise clamps which can fix the radial module, the height module and the tilt module in one position.
  • the printing press is characterized in that piezo elements assigned to a print head module are provided which are suitable for aligning the print head module relative to the container to be printed.
  • piezo elements assigned to a print head module are provided which are suitable for aligning the print head module relative to the container to be printed.
  • a protective position and / or a cleaning position and / or a maintenance position can be provided, into which the print head module can be moved. In this way, an unused printhead module can be protected from external influences or serviced or cleaned.
  • the printing press can comprise a cleaning unit which is suitable for cleaning the print head module when it is in the cleaning position.
  • a preferably automatic and therefore time-saving cleaning of a printhead module to be cleaned can take place, which can shorten the times until it is used again.
  • Fig. 1 shows a printing machine 100 according to the invention in a schematic view.
  • This printing machine 100 comprises at least one conveyor 101, with the aid of which the containers, such as for example bottles 110, can be transported.
  • This conveyor 101 can be any type of conveyor commonly used in the container and packaging industry. In particular, it can be a linear conveyor or, as shown here, a conveyor star.
  • This is fed, for example, by a further conveyor 180 to the containers 110 which are to be printed on by the printing press 100.
  • the printing takes place while one of the containers 110 is on the conveyor 101 with the aid of printing units 120, which comprise at least one printhead module 102.
  • a large number of printing units 120 can be provided in the printing press 100.
  • each of these printing units 120 can comprise one or more print head modules 102, the print head modules 102 of a printing unit 120 being able to print the container 110 to be printed either with the same color or with different colors.
  • the individual printhead modules 102 of a printing unit 120 can also print on the container 110 at different locations. If the printing is completed after all printing units 120 have been run through, the printed container 110 can be removed from the printing press 100, for example, by a further conveyor 190. This transport can take place cyclically as well as continuously.
  • Fig. 2 shows a printing unit 120 with printhead modules 102.
  • the printhead modules are usually positioned as close as possible to the wall of the container in order to ensure correct printing.
  • a printing unit 120 can either comprise only one printing head module 102 or also a plurality of printing head modules 102. These can then, as in Fig. 2 indicated to be arranged one below the other. However, it is also possible to arrange the printhead modules 102 next to one another.
  • Each printhead module 102 includes at least one printhead, not shown here. This usually has one or more rows of nozzles, which can apply printer ink with special properties to the container 110, for example with the aid of a drop-on-demand printing method.
  • these nozzle rows have a plurality of nozzles which can apply the ink to the container wall of the container 110 with very high accuracy. Typical accuracies range from a few hundredths of a millimeter to a few tenths of a millimeter, depending on the intended use. Coarser accuracies are also possible. However, in order to achieve a high printing accuracy with the aid of the print heads or the print head of the print head module 102, a correspondingly precise alignment of the print head and thus of the print head module 102 with respect to the container 110 is necessary.
  • the printing unit 120 comprises a measuring system 204.
  • This measuring system 204 can be designed in a variety of ways. For example, it can use optical sensors to determine its position and thus the position of the printhead module 102 relative to the container 110 or the conveyor. Magnetic or capacitive measuring principles can also be used.
  • the measuring system determines its position on the basis of its own position on rails or similar devices provided for this purpose, and compares it with reference data stored in a system memory, which is not shown here, an embodiment of the measuring system 204 using magnetic or capacitive Measuring devices over optical is advantageous. This is particularly advantageous if the containers 110 are fed to the printing press with very high accuracy. Deviations in the positioning of the printheads of the printhead module 102 in relation to the container 110 then arise due to incorrect positions of the printhead or printhead or printhead module 102. It is provided that a corresponding control unit, which is not shown here, contains the data from the measuring system 204 can process in a suitable manner and the control of a travel system which is provided in the printing unit 120 positions the print head module 102 accordingly.
  • the traversing system can have three modules, a radial module 205, a height module 206 and a tilting module 207.
  • the radial module is designed such that it can set a distance of the print head module 102 from the container 110.
  • a corresponding motor for example a motor-spindle-nut drive, can set the distance of the printhead module 102 from the container wall 110 in accordance with the instructions of the control unit.
  • the height module 206 can bring about a height adjustment of a print head module 102.
  • it is preferably also equipped with a motor-spindle-nut drive and allows the print head module 102 or a corresponding extension 262 to be moved along a vertical axis.
  • the tilting module 207 is constructed similarly and advantageously also includes a motor-spindle-nut drive. However, it acts on the printhead module 102 in such a way that it can be tilted with respect to the outer wall of the container 110. Is in Fig. 2b to recognize. Here is a printhead module 102 on a side bevel of a container 110 along. The tilting of the printhead module 102 is achieved by the tilt module 207.
  • the tilting module 207 comprises a tilting rod 271 or other connection, which is arranged offset to a pivot point 272 on the printhead module 102. Moving this tilting rod 271 correspondingly rotates the push-button module 102 about the pivot point 272.
  • Other designs are also conceivable here.
  • the printhead module 102 there is no movement of the printhead module 102 during the printing process. Corresponding movements of the print head module 102 by means of at least one of the modules 205, 206, 207 are therefore preferably carried out before the printing process to adjust the position of each print head module.
  • the printhead module 102 can also move at very high speeds in order to ensure a higher throughput in the printing press, high accelerations occur which can lead to unintentional tilting and / or displacements of the printhead module 102.
  • corresponding clamps 251, 252 and 253 can therefore support fixing of the printhead module 102 with regard to either a change in position by the radial module 205, a change in position by the height module 206 or a change in position by the tilting module 207.
  • the jams can be mechanically designed in the form of brake shoes or clamping shoes, but can also be provided electromagnetically.
  • each printing unit 120 advantageously has at least one ink tank 225 assigned to it, in which the ink that is to be applied to the containers 110 is held.
  • each printing unit 120 advantageously has at least one a means for centering and / or clamping / fastening (for example a clamping / or centering system such as a zero point clamping element) 211 of the printing unit 120. Since it can be advantageous if the entire printing unit 120 can be exchanged with the ink tank 225, this can also be corresponding means for centering and / or clamping / fastening 211 for attachment to other stationary machine parts 230 of the printing press.
  • the means for centering the printing unit 120 can be designed such that they can be attached to the ink tank 225. However, the printing unit can also be centered directly on further machine parts 230 of the printing press. Thus, even after replacement of a corresponding printing unit 120, it is ensured that it can be reintroduced into a predetermined position with very high accuracy.
  • the row of nozzles or rows of nozzles of a print head of a print head module 102 can be tilted with respect to the transport direction of the containers 110 to be printed. This is a tilt that cannot be compensated for by the tilt module 207.
  • the tilt module 207 acts accordingly Fig. 2b tilting of the print head module 102 such that the print head module 102 runs as parallel as possible to the surface of the container 110 to be printed.
  • the rows of nozzles can, however, be tilted perpendicular to it, that is to say in the transport direction of the container to be printed. This malposition cannot be compensated for by the tilting module.
  • an alignment module is additionally provided which ensures a vertical alignment of the rows of nozzles of the printhead module 102 with respect to the direction of transport of the containers 110 to be printed. All in all, this makes it possible to adjust the print head module and, in particular, the nozzle rows with respect to each degree of freedom of movement.
  • the radial module 205, the height module 206 and the tilt module 207 have been described here as being suitable for changing the position of the print head module 102, corresponding assemblies can also be provided in order to enable the position of an individual print head to be changed separately. It is particularly advantageous if the measuring system 204 can measure the position of the print head module 102 and / or the print head with an accuracy of less than 0.5 mm, preferably less than 0.1 mm, particularly preferably less than 0.01 mm Corresponding data can be passed on to the control unit, which in turn can adjust the position of the print head and / or the print head module 102 with a corresponding accuracy.
  • each individual print head module 102 according to FIG Fig. 2c additionally connected to the printing unit 120 via a holder 280.
  • the described attachment of the modules, ie the radial module 205, the height module 206 and the tilting module 207, can then be carried out on this holder 280.
  • the printhead module 102 is then preferably attached to this holder via piezo elements 281, 282 (as in FIG Fig.
  • piezo elements 281, 282 and 283 can be used to position the print head module 102 in the X direction and Y direction shown Fig. 2c and Z direction according to Fig. 2d with respect to the container 110 to be printed, which in this example defines the Y axis, can be carried out with very high accuracy.
  • this allows the printhead module 102 to be positioned very precisely, even without loosening the clamps 251, 252 and 253, which is particularly advantageous in the case of necessary changes in position that are clearly below one millimeter.
  • the use of the piezo elements 281, 282 and 283 allows, due to the quick response of the piezo elements, a fine adjustment of the positioning of the print head modules 102 even during the operation of the device.
  • This fine adjustment can advantageously be carried out even for each container to be printed and can be achieved, for example, using sensors that determine the position of the container very precisely or register and evaluate the print image that was generated with the aid of the previous print head module.
  • each print head module for example with the aid of UV ink, attaches markings to a container, which can be registered and evaluated by a correspondingly provided sensor, so that the control unit, depending on the position of the print image, relative to the sensor Fine adjustment of the next printhead module using the piezo elements.
  • sensors are preferably between two printhead modules 102, as shown, for example, in FIG Fig. 1 are attached, so that a fine adjustment of a printhead module can take place depending on the information of the position marking, which was applied by the previous printhead module to the container to be printed.
  • Fig. 3 shows a possible embodiment of the replacement or removal of a printing unit 120.
  • an axis of rotation 350 is provided which enables the printing unit 120 'to be unscrewed from its starting position (shown here in dashed lines) into a transport position which is indicated by the printing unit 120.
  • the printing unit 120 to be exchanged can then be removed by separation from the axis of rotation 350.
  • a quick and flexible expansion of a printing unit 120 is thus possible.
  • To install a new printing unit 120 the same procedure is carried out in the reverse order.
  • the printing unit 120 is brought into the position shown and connected to the axis of rotation 350.
  • the transport position enables appropriate access and the possible exchange / removal / maintenance of certain individual parts of the printing unit 120.
  • modules 205, 206, 207 can be used to move printhead module 102 to a protective position when not in use.
  • the printhead module can be tilted, for example, by 90 ° and moved away from the containers in the radial direction, so that it can no longer be used for printing on containers and to avoid damage to the nozzle rows due to accidental contact with containers and the nozzle rows and especially to protect the ink from drying out or from foreign particles such as dust.
  • the protective position is provided in an area shielded from light. It is also advantageous if the rows of nozzles point towards the ground so that any ink drops can drip off and thus do not impair the rows of nozzles. In an appropriate position or another position, the (automatic) cleaning of the printhead module 102 and in particular the rows of nozzles can also take place. It can advantageously be provided here that a cleaning unit starts the automatic cleaning of the rows of nozzles and / or the print head module 102 as soon as the print head module 102 is in the corresponding position.
  • the printhead module can also be serviced in such a position. If maintenance is automatic the maintenance position can be identical to the protective position. If it is done manually, it can be advantageous if the maintenance position is provided at a location on the machine that is easy to reach for an operator.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Ink Jet (AREA)

Claims (14)

  1. Imprimante (100) pour imprimer des récipients (110) tels que des bouteilles, comprenant au moins un convoyeur (101) et au moins une unité d'impression (120) avec un module de tête d'impression (102), avec au moins une tête d'impression, un système de déplacement pour régler la position du module de tête d'impression (102), un système de mesure (204) pour déterminer la position du module de tête d'impression (102) et une unité de commande pour commander le système de déplacement, dans lequel le système de déplacement comprend un module radial (205) pour ajuster la position du module de tête d'impression (102) dans la direction radiale, un module de hauteur (206) pour ajuster la hauteur du module de tête d'impression (102) dans la direction verticale, caractérisé en ce que le système de déplacement comprend en outre un module d'alignement pour aligner verticalement les rangées de buses du module de tête d'impression (102) par rapport à la direction de transport des récipients (110) à imprimer.
  2. Imprimante (100) selon la revendication 1, caractérisée en ce qu'elle comprend en outre un module d'inclinaison (207) pour régler l'inclinaison du module de tête d'impression (102).
  3. Imprimante (100) selon la revendication 2, caractérisée en ce que le module radial (205), le module de hauteur (206) et le module de basculement (207) sont réglables indépendamment les uns des autres.
  4. Imprimante (100) selon l'une quelconque des revendications 2 à 3, caractérisée en ce que le module radial (205), le module de hauteur (206) et le module de basculement (207) comprennent chacun un moteur (109), de préférence un entraînement moteur-broche-écrou.
  5. Imprimante (100) selon l'une quelconque des revendications 1 à 4, caractérisée en ce que l'unité d'impression (120) comprend des moyens de centrage (211) de l'unité d'impression (120) sur la Imprimante (100).
  6. Imprimante (100) selon l'une des revendications 1 à 5, caractérisée en ce que le système de mesure (204) peut mesurer la position du module de tête d'impression (102) avec une précision inférieure à 0,5 mm, de préférence inférieure à 0,1 mm, de manière particulièrement préférée inférieure à 0,01 mm.
  7. Imprimante (100) selon l'une des revendications 1 à 6, caractérisée en ce que les modules de tête d'impression (102) sont prévus de manière interchangeable.
  8. Imprimante (100) selon l'une des revendications 1 à 7, caractérisée en ce que l'unité de commande peut régler la position du module de tête d'impression (102) avec une précision de 0,5 mm, de préférence de 0,1 mm, particulièrement de 0,01 mm.
  9. Imprimante (100) selon l'une des revendications 1 à 8, caractérisée en ce que l'unité d'impression (120) est associée à un réservoir d'encre (225) relié à l'unité d'impression (120) par une ligne.
  10. Imprimante (100) selon l'une des revendications 1 à 9, caractérisée en ce que l'unité de commande peut régler la position du module de tête d'impression (102) en fonction des données qui peuvent être transmises du système de mesure (204) à l'unité de commande.
  11. Imprimante (100) selon l'une des revendications 2 à 10, caractérisée en ce que le module radial (205), le module de hauteur (206) et le module d'inclinaison (207) comportent des pinces qui peuvent fixer le module radial (205), le module de hauteur (206) et le module d'inclinaison (207) dans une position.
  12. Imprimante (100) selon l'une des revendications 1 à 11, caractérisée en ce qu'il est prévu des éléments piézoélectriques (281, 282, 283) associés à un module de tête d'impression (102) qui sont appropriés pour aligner le module de tête d'impression (102) par rapport au récipient (110) à imprimer.
  13. Imprimante (100) selon l'une des revendications 1 à 12, caractérisée en ce qu'il est prévu une position de protection et/ou une position de nettoyage et/ou une position d'entretien, dans laquelle le module de tête d'impression (102) peut être déplacé.
  14. Imprimante (100) selon la revendication 13, caractérisée en ce qu'il est prévu une unité de nettoyage qui est conçue pour nettoyer le module de tête d'impression (102) lorsqu'il est en position de nettoyage.
EP14174073.8A 2013-07-31 2014-06-26 Imprimante dotée d'une commande de tête d'impression Active EP2832546B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013214980.8A DE102013214980A1 (de) 2013-07-31 2013-07-31 Druckmaschine mit Druckkopfsteuerung

Publications (2)

Publication Number Publication Date
EP2832546A1 EP2832546A1 (fr) 2015-02-04
EP2832546B1 true EP2832546B1 (fr) 2020-06-10

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EP14174073.8A Active EP2832546B1 (fr) 2013-07-31 2014-06-26 Imprimante dotée d'une commande de tête d'impression

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Country Link
US (1) US9327492B2 (fr)
EP (1) EP2832546B1 (fr)
CN (1) CN104339878B (fr)
DE (1) DE102013214980A1 (fr)

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EP3265314B1 (fr) * 2015-03-04 2021-08-25 Stolle Machinery Company, LLC Machine d'impression numérique
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US10259249B2 (en) 2017-07-14 2019-04-16 Stolle Machinery Company, Llc Post-treatment assembly and method for treating work pieces
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DE102017215437A1 (de) * 2017-09-04 2019-03-07 Krones Ag Vorrichtung zum Bedrucken von Behältern, Druckmaschine und Verfahren zum Verschwenken eines Druckmoduls mit einem darin eingebauten Druckkopf
DE102017215430A1 (de) 2017-09-04 2019-03-07 Krones Ag Direktdruckmaschine und -verfahren zur Bedruckung von Behältern mit einem Direktdruck
DE102017215446A1 (de) 2017-09-04 2019-03-07 Krones Ag Druckmaschine zum Direktbedrucken von Behältern
EP3473446B1 (fr) * 2017-10-17 2020-08-26 HINTERKOPF GmbH Machine d'impression numérique à table ronde et imprimante
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JP7422565B2 (ja) * 2020-03-05 2024-01-26 アルテミラ株式会社 缶体印刷方法、缶体印刷システム
EP4210958A4 (fr) 2020-09-10 2024-10-16 Ink Cups Now LLC Système et procédé d'impression de récipient creux
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EP2832546A1 (fr) 2015-02-04
CN104339878A (zh) 2015-02-11
US9327492B2 (en) 2016-05-03
CN104339878B (zh) 2017-04-12
DE102013214980A1 (de) 2015-02-05

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