EP1974928B1 - Method for printing on a three-dimensional container - Google Patents

Method for printing on a three-dimensional container Download PDF

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Publication number
EP1974928B1
EP1974928B1 EP07006247A EP07006247A EP1974928B1 EP 1974928 B1 EP1974928 B1 EP 1974928B1 EP 07006247 A EP07006247 A EP 07006247A EP 07006247 A EP07006247 A EP 07006247A EP 1974928 B1 EP1974928 B1 EP 1974928B1
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EP
European Patent Office
Prior art keywords
printing
container
printed
process according
positioning device
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
EP07006247A
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German (de)
French (fr)
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EP1974928A1 (en
Inventor
Ludwig Albrecht
Karl Frey
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.)
Homag GmbH
Original Assignee
Homag Holzbearbeitungssysteme GmbH
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 Homag Holzbearbeitungssysteme GmbH filed Critical Homag Holzbearbeitungssysteme GmbH
Priority to EP07006247A priority Critical patent/EP1974928B1/en
Priority to ES07006247T priority patent/ES2334393T3/en
Priority to DE502007002035T priority patent/DE502007002035D1/en
Priority to PL07006247T priority patent/PL1974928T3/en
Priority to US12/055,904 priority patent/US8104887B2/en
Priority to CN2008101003266A priority patent/CN101274543B/en
Publication of EP1974928A1 publication Critical patent/EP1974928A1/en
Application granted granted Critical
Publication of EP1974928B1 publication Critical patent/EP1974928B1/en
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
    • 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
    • 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
    • B41J3/543—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 with multiple inkjet print heads

Definitions

  • the invention relates to a method for printing a three-dimensional container.
  • Three-dimensional objects such as plate-shaped workpieces from the furniture industry are increasingly printed with various patterns desired by the customer, for example by means of an ink-jet printing device.
  • the EP 1 726 443 A a device for the printing of workpieces in the area of a narrow surface, with which high-quality samples can be created.
  • the desired quality of the printed image can not be achieved in some cases, for example in the case of deformable or irregular workpieces.
  • JP 10 157245 A a device is described by means of which folded cartons are conveyed on a conveyor belt and brought into a region between lateral pressure rollers, where the side surfaces of the folded and unfilled cartons are then printed.
  • the invention is based on the finding that in a method of the type mentioned at the beginning, the quality of the patterning depends essentially on the distance between the printing device and the surface of the object to be patterned.
  • the invention provides that an apparatus for use for the method according to the invention further comprises a positioning device which is adapted to bring the surface to be printed of the three-dimensional object in a predetermined relative relationship, in particular a predetermined distance to the printing device. In this way, even with deformable or irregular three-dimensional objects always an optimal distance between the printing device and the surface to be sampled of the article can be ensured, whereby a high-quality sampling can be achieved.
  • the method according to the invention is characterized in that the container is charged with contents, in particular workpieces, prior to printing.
  • This opens up completely new possibilities in the individualization of the containers.
  • any waste of containers is avoided, which has been created by the fact that printed container blanks were prefabricated in large quantities, without a corresponding customer order was available or was sufficiently precise.
  • an extremely variable and customized printing of the container with low rejects is thus possible with continued high-quality printing.
  • the surface to be printed on the container before printing through the Positioning device is deformed.
  • curved surfaces of the container can be brought into a flat state before printing, which is particularly well suited for high-quality printing. This can be advantageous, for example, in the case of containers filled with workpieces, since it has been shown that in some cases an undesirable deformation of the container, which can impair the printing process, results due to the filling process of the container.
  • the positioning device for use in the method according to the invention can be designed in many different ways. According to one embodiment, it is provided that the positioning device has at least one stop element, whereby an effective relative positioning can be achieved with a simple construction. It should be noted, however, that within the scope of the present invention it is also possible to use non-contact positioning devices which, for example, can work magnetically or in any other way.
  • the positioning device has at least one endlessly revolving or rotating stop element, in particular a guide belt or a stop roller.
  • stop elements connect a precise positioning with a low-friction and rapid conveying operation of the objects to be printed in the device.
  • the positioning device is arranged at least in sections upstream of the printing device with respect to the relative movement between the printing device and the three-dimensional object to be printed.
  • the positioning device is arranged at least in sections upstream of the printing device with respect to the relative movement between the printing device and the three-dimensional object to be printed.
  • the positioning device has at least two stop elements. This results in a particularly precise determination of the relative positioning between surface to be printed and printing device. It is particularly preferred that at least one stop element is movable. As a result, various advantages can be achieved. On the one hand, the movability of at least one stop element makes it possible to adapt the device to different dimensions of the articles to be printed; on the other hand, the movability of at least one stop element can also be used to generate a pressure force between the stop elements and the surfaces to be printed in order to make the articles particularly stable to lead and to further improve the print quality.
  • the printing device can be configured for use in many different ways for the method according to the invention and, for example, also have a plurality of printing units in order to print the respective article not only on one but on several or optionally all surfaces. It is particularly preferred that each printing unit is associated with at least one stop element, so that the exact relative positioning according to the invention can be achieved for each printing unit, although the device according to the invention can also have printing units without a stop element.
  • At least one printing unit is movable, and preferably synchronously with the at least one associated stop element.
  • the device can be easily and precisely adapted to a wide variety of dimensions and configurations of objects to be printed, without any loss of print quality being associated therewith.
  • FIG Fig. 1 and 2 An apparatus 1 for printing on containers 2 is shown in FIG Fig. 1 and 2 schematically shown in a plan view and a sectional view.
  • the container 2 in the present embodiment is a carton having an upper feed opening previously folded from a carton blank. It should be noted, however, that the present invention is applicable to completely different types of containers.
  • the apparatus 1 in the present embodiment has a printing device 10 with two printing units 12, 14, which are formed in the present embodiment as ink-jet printing heads with a plurality of ink outlet openings.
  • the printing units 12, 14 are in each case via a supply line 18 with an ink reservoir 16 in connection, although the ink reservoir 16 can of course also be arranged directly on the print head 12, 14.
  • the Druckeihneiten 12, 14 each with a printer controller 12 ', 14' in connection, which in the context of the present invention, a single, integrated printer control can be provided, which can optionally also take over the control of the entire device. Furthermore, it should be noted that in the context of the present invention, other types of printing devices can also be used.
  • the device 1 comprises a conveyor 20 for conveying the containers 2 to be printed on the printing units 12, 14.
  • the conveyor 20 is formed in the present embodiment as a belt conveyor with two conveyor belt 22, although of course other conveyors can be used, such as chain conveyor, carriage conveyor, air cushion conveyor and the like.
  • the conveyor may also be designed such that, alternatively or in addition to conveying the container to be printed, the printing device is moved.
  • the present invention can be applied to both continuous and stationary machines, as well as to combinations thereof, such as clocked machines.
  • the device 1 for use in the method according to the invention comprises a positioning device 30, which in the present embodiment is formed by two lateral guide belts 32, 34.
  • the guide surface of the guide belts 32, 34 extends substantially perpendicular to the conveying plane of the conveyor 20. More generally, the guide surface of the guide belts 32, 34 or more generally stop elements extends substantially parallel to a print output surface (eg. Surface with nozzle outlet openings) of the associated printing unit 12 or 14.
  • the guide belts 32, 34 are, as in Fig. 1 can be best seen, formed by endlessly circulating belt 32 ', each about two pulleys 32 "stretched and possibly guided therebetween via a guide rail.
  • other types of stop elements as positioning can be used come, such as stop rollers, stop plates, stop bolts or the like.
  • the guide belts 32, 34 are arranged upstream of the printing units 12, 14 with respect to the conveying direction of the objects 2 to be printed.
  • the guide belts 32, 34 can be adjusted such that their guide surfaces facing the objects 2 to be printed are located at a predetermined (orthogonal) distance from the ink outlet openings of the print heads 12, 14.
  • the guide belt 34 is movable in the present embodiment, so that the distance between the guide belt 32, 34 can be varied according to the respective width of the objects 2 to be printed.
  • the printing unit 14 is movable together with or simultaneously to the guide belt 34 in order to always ensure the desired or optimal (orthogonal) distance between the ink outlet openings of the print head 14 and the surface 2 'to be printed of the respective article 2.
  • funnel-like inlet elements 24 are also arranged, which help to introduce the conveyed by the conveyor 20 objects safely in the area between the guide belts 32, 34.
  • the operation of the conveyor 20 and the positioning device 30 is controlled in the present embodiment by a machine control 4, which, however, as already indicated above, if necessary, can also be combined with the printer controller 12 ', 14' to form an integral control unit.
  • the conveying speed of the conveyor 20 is advantageously matched to the conveying speed of the guide belts 32, 34.
  • two drying devices 40 are arranged, which are designed to rapidly dry or harden the ink applied to the respective articles 2.
  • any printing medium or any printing ink can be used within the scope of the device for use in the method according to the invention, it has proved advantageous to use an oil-based ink, in particular for containers 2 to be printed on cardboard or the like. This avoids possible problems in drying or curing UV ink by means of a UV drying device, since it has been shown that the ink penetrates deeply into the cardboard material and then no longer optimally accessible to a drying or curing process by the UV rays is.
  • the operation of the device 1 for use in the method according to the invention takes place, for example, in the context of an integrated customer delivery system as follows.
  • an upstream process for example, plate-shaped workpieces such as floor panels or the like are produced, packed in cardboard containers 2 and stored temporarily.
  • the cardboard container 2 for example, brought in advance by folding cardboard blanks in a container shape.
  • the ordered number of containers 2 of the device 1 is supplied and in the area between the guide belts 32, 34 conveyed.
  • the device 1 upstream of the guide belt optionally detect the width of the container to be printed 2 and adjust the position of the guide belt 34 together with the position of the printing unit 14 to the appropriate width.
  • the side surfaces 2 'of the container 2 are printed using the printing units 12, 14. Subsequently, the containers 2 pass through the drying devices 40, by means of which the ink applied by the printing units 12, 14 is dried, so that the containers 2 filled with workpieces can be further processed immediately afterwards, for example, welded into a transparent film.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Ink Jet (AREA)
  • Dot-Matrix Printers And Others (AREA)

Description

Technisches GebietTechnical area

Die Erfindung betrifft ein Verfahren zum Bedrucken eines dreidimensionalen Behälters.The invention relates to a method for printing a three-dimensional container.

Stand der TechnikState of the art

Dreidimensionale Gegenstände, wie beispielsweise plattenförmige Werkstücke aus dem Bereich der Möbelindustrie, werden zunehmend mit verschiedenen, von den Kunden gewünschten Mustern bedruckt, beispielsweise mittels einer Ink-Jet-Druckvorrichtung. So offenbart beispielsweise die EP 1 726 443 A eine Vorrichtung zum Bedrucken von Werkstücken im Bereich einer Schmalfläche, mit der sich qualitativ hochwertige Bemusterungen erstellen lassen. Allerdings hat sich gezeigt, dass die gewünschte Qualität des Druckbildes in manchen Fällen, beispielsweise bei verformbaren oder unregelmäßigen Werkstücken, nicht erreicht werden kann.Three-dimensional objects, such as plate-shaped workpieces from the furniture industry are increasingly printed with various patterns desired by the customer, for example by means of an ink-jet printing device. For example, the EP 1 726 443 A a device for the printing of workpieces in the area of a narrow surface, with which high-quality samples can be created. However, it has been shown that the desired quality of the printed image can not be achieved in some cases, for example in the case of deformable or irregular workpieces.

In der US 5 810 487 wird eine Vorrichtung zum Bedrucken eines dreidimensionalen Gegenstands oder Behälters beschrieben, welche allerdings keine mit der vorliegenden Erfindung vergleichbare Positioniereinrichtung aufweist.In the US 5,810,487 a device for printing a three-dimensional object or container is described, which, however, has no comparable positioning device with the present invention.

In der JP 10 157245 A ist eine Vorrichtung beschrieben, mit Hilfe welcher gefaltete Kartons auf einem Förderband gefördert und in einen Bereich zwischen seitlichen Andruckrollen gebracht werden, wo die Seitenflächen der gefalteten und nicht befüllten Kartons dann bedruckt werden.In the JP 10 157245 A a device is described by means of which folded cartons are conveyed on a conveyor belt and brought into a region between lateral pressure rollers, where the side surfaces of the folded and unfilled cartons are then printed.

Darstellung der ErfindungPresentation of the invention

Es ist daher Aufgabe der Erfindung, ein Verfahren der eingangs genannten Art bereitzustellen, das auch bei verformbaren oder unregelmäßigen dreidimensionalen Gegenständen eine qualitativ hochwertige Bemusterung der Gegenstände ermöglicht.It is therefore an object of the invention to provide a method of the type mentioned, which allows a high-quality sampling of the objects even with deformable or irregular three-dimensional objects.

Diese Aufgabe wird erfindungsgemäß durch ein Verfahren unter Einsatz einer Vorrichtung zum Bedrucken eines dreidimensionalen Behälters nach Anspruch 1 gelöst.
Besonders vorteilhafte Weiterbildungen der Erfindung sind in den abhängigen Ansprüchen angegeben.This object is achieved by a method using a device for printing a three-dimensional container according to claim 1.
Particularly advantageous developments of the invention are specified in the dependent claims.

Der Erfindung liegt die Erkenntnis zugrunde, dass bei einem Verfahren der eingangs genannten Art die Bemusterungsqualität wesentlich von dem Abstand zwischen der Druckeinrichtung und der zu bemusternden Oberfläche des Gegenstands abhängig ist. Zu diesem Zweck ist erfindungsgemäß vorgesehen, dass eine Vorrichtung zum Einsatz für das erfindungsgemäße Verfahren ferner eine Positioniereinrichtung aufweist, die eingerichtet ist, die zu bedruckende Oberfläche des dreidimensionalen Gegenstands in eine vorbestimmte Relativbeziehung, insbesondere einen vorbestimmten Abstand, zur Druckeinrichtung zu bringen. Auf diese Weise kann selbst bei verformbaren oder unregelmäßigen dreidimensionalen Gegenständen stets ein optimaler Abstand zwischen der Druckeinrichtung und der zu bemusternden Oberfläche des Gegenstands sichergestellt werden, wodurch eine qualitativ hochwertige Bemusterung erzielt werden kann.The invention is based on the finding that in a method of the type mentioned at the beginning, the quality of the patterning depends essentially on the distance between the printing device and the surface of the object to be patterned. For this purpose, the invention provides that an apparatus for use for the method according to the invention further comprises a positioning device which is adapted to bring the surface to be printed of the three-dimensional object in a predetermined relative relationship, in particular a predetermined distance to the printing device. In this way, even with deformable or irregular three-dimensional objects always an optimal distance between the printing device and the surface to be sampled of the article can be ensured, whereby a high-quality sampling can be achieved.

Gleichzeitig ergeben sich ein einfacher Betrieb und eine einfache Konstruktion der Vorrichtung zum Einsatz für das erfindungsgemäße Verfahren, da ein präzises Auflegen des zu bedruckenden Gegenstands oder eine Positionserfassung mittels Sensoren oder dergleichen nicht unbedingt erforderlich ist.At the same time a simple operation and a simple construction of the device for use in the inventive method, since a precise placement of the object to be printed or a position detection by means of sensors or the like is not necessarily required.

Das erfindungsgemäße Verfahren zeichnet sich dadurch aus, dass der Behälter vor dem Bedrucken mit Inhalten, insbesondere Werkstücken beschickt wird. Hierdurch werden völlig neue Möglichkeiten bei der Individualisierung der Behälter eröffnet. So wird es beispielsweise möglich, Behälter mit jeweiligen Inhalten in Großserie zu befüllen und gegebenenfalls schon zu verschließen, und erst bei Vorliegen eines entsprechenden Kundenauftrages die befüllten Behälter abzurufen und mit der vom Kunden gewünschten Bemusterung zu versehen, die beispielsweise das Logo des Kunden etc. zeigt. Auf diese Weise wird jeglicher Ausschuss an Behältern vermieden, der bisher dadurch entstanden ist, dass bedruckte Behälterrohlinge in großen Stückzahlen vorgefertigt wurden, ohne dass ein entsprechender Kundenauftrag vorlag bzw. ausreichend präzisiert war. Insgesamt wird hierdurch bei weiterhin qualitativ hochwertiger Bedruckung ein extrem variables und kundenindividualisiertes Bedrucken der Behälter mit geringem Ausschuss ermöglicht.The method according to the invention is characterized in that the container is charged with contents, in particular workpieces, prior to printing. This opens up completely new possibilities in the individualization of the containers. Thus, it becomes possible, for example, to fill containers with respective contents in large series and, if necessary, to close them, and to retrieve the filled containers only when there is a corresponding customer order and to provide them with the customer-requested sampling, which, for example, shows the customer's logo, etc. , In this way, any waste of containers is avoided, which has been created by the fact that printed container blanks were prefabricated in large quantities, without a corresponding customer order was available or was sufficiently precise. Overall, an extremely variable and customized printing of the container with low rejects is thus possible with continued high-quality printing.

Darüber hinaus ist vorgesehen, dass die zu bedruckende Oberfläche des Behälters vor dem Bedrucken durch die Positioniereinrichtung verformt wird. Auf diese Weise können gekrümmte Oberflächen des Behälters vor dem Bedrucken in einen ebenen Zustand gebracht werden, der sich besonders gut für eine qualitativ hochwertige Bedruckung eignet. Dies kann beispielsweise bei mit Werkstücken befüllten Behältern vorteilhaft sein, da sich gezeigt hat, dass sich durch den Befüllvorgang des Behälters in manchen Fällen eine unerwünschte Verformung des Behälters ergibt, die den Druckvorgang beeinträchtigen kann.In addition, it is provided that the surface to be printed on the container before printing through the Positioning device is deformed. In this way, curved surfaces of the container can be brought into a flat state before printing, which is particularly well suited for high-quality printing. This can be advantageous, for example, in the case of containers filled with workpieces, since it has been shown that in some cases an undesirable deformation of the container, which can impair the printing process, results due to the filling process of the container.

Die Positioniereinrichtung zum Einsatz für das erfindungsgemäße Verfahren kann auf unterschiedlichste Art und Weise ausgestaltet sein. Gemäß einer Weiterbildung ist vorgesehen, dass die Positioniereinrichtung mindestens ein Anschlagelement aufweist, wodurch sich bei einfacher Konstruktion eine wirksame Relativpositionierung erzielen lässt. Es ist jedoch zu beachten, dass im Rahmen der vorliegenden Erfindung auch berührungslos arbeitende Positioniereinrichtungen zum Einsatz kommen können, die beispielsweise magnetisch oder auf sonstige Weise arbeiten können.The positioning device for use in the method according to the invention can be designed in many different ways. According to one embodiment, it is provided that the positioning device has at least one stop element, whereby an effective relative positioning can be achieved with a simple construction. It should be noted, however, that within the scope of the present invention it is also possible to use non-contact positioning devices which, for example, can work magnetically or in any other way.

Alternativ oder zusätzlich weist die Positioniereinrichtung gemäß einer Weiterbildung der Vorrichtung zum Einsatz für das erfindungsgemäße Verfahren mindestens ein endlos umlaufendes oder rotierendes Anschlagelement auf, insbesondere einen Führungsriemen oder eine Anschlagrolle. Derartige Anschlagelemente verbinden eine präzise Positionierung mit einem reibungsarmen und zügigen Förderbetrieb der zu bedruckenden Gegenstände in der Vorrichtung.Alternatively or additionally, according to a development of the device for use in the method according to the invention, the positioning device has at least one endlessly revolving or rotating stop element, in particular a guide belt or a stop roller. Such stop elements connect a precise positioning with a low-friction and rapid conveying operation of the objects to be printed in the device.

Bei allen Gestaltungen der Positioniereinrichtung ist es im Rahmen der vorliegenden Erfindung gemäß einer Weiterbildung bevorzugt, dass die Positioniereinrichtung in Bezug auf die Relativbewegung zwischen der Druckeinrichtung und dem zu bedruckenden dreidimensionalen Gegenstand zumindest abschnittsweise stromaufwärts der Druckeinrichtung angeordnet ist. Hierdurch kann die zu bedruckende Oberfläche besonders wirksam in die gewünschte Relativbewegung zu der Druckeinrichtung gebracht werden, sodass sich eine hohe Druckqualität ergibt.In all embodiments of the positioning device, it is preferred in the context of the present invention according to a development that the positioning device is arranged at least in sections upstream of the printing device with respect to the relative movement between the printing device and the three-dimensional object to be printed. As a result, the surface to be printed particularly effective in the desired relative movement to the Printing device are brought, resulting in a high print quality.

Gemäß einer Weiterbildung der Vorrichtung zum Einsatz für das erfindungsgemäße Verfahren weist die Positioniereinrichtung mindestens zwei Anschlagelemente auf. Hierdurch ergibt sich eine besonders präzise Festlegung der Relativpositionierung zwischen zu bedruckender Oberfläche und Druckeinrichtung. Dabei ist es besonders bevorzugt, dass mindestens ein Anschlagelement verfahrbar ist. Hierdurch lassen sich verschiedene Vorteile erzielen. Einerseits ermöglicht die Verfahrbarkeit mindestens eines Anschlagelements die Anpassung der Vorrichtung an unterschiedliche Abmessungen der zu bedruckenden Gegenstände, andererseits kann die Verfahrbarkeit mindestens eines Anschlagelements auch dazu genutzt werden, eine Andruckkraft zwischen den Anschlagelementen und den zu bedruckenden Oberflächen zu erzeugen, um hierdurch die Gegenstände besonders stabil zu führen und die Druckqualität weiter zu verbessern.According to a development of the device for use in the method according to the invention, the positioning device has at least two stop elements. This results in a particularly precise determination of the relative positioning between surface to be printed and printing device. It is particularly preferred that at least one stop element is movable. As a result, various advantages can be achieved. On the one hand, the movability of at least one stop element makes it possible to adapt the device to different dimensions of the articles to be printed; on the other hand, the movability of at least one stop element can also be used to generate a pressure force between the stop elements and the surfaces to be printed in order to make the articles particularly stable to lead and to further improve the print quality.

Die Druckeinrichtung kann zum Einsatz für das erfindungsgemäße Verfahren auf unterschiedlichste Art und Weise ausgestaltet sein und beispielsweise auch eine Mehrzahl von Druckeinheiten aufweisen, um den jeweiligen Gegenstand nicht nur an einer, sondern an mehreren oder gegebenenfalls allen Oberflächen zu bedrucken. Dabei ist es besonders bevorzugt, dass jeder Druckeinheit mindestens ein Anschlagelement zugeordnet ist, sodass für jede Druckeinheit die erfindungsgemäße, genaue Relativpositionierung erreicht werden kann, obgleich die erfindungsgemäße Vorrichtung auch Druckeinheiten ohne Anschlagelement aufweisen kann.The printing device can be configured for use in many different ways for the method according to the invention and, for example, also have a plurality of printing units in order to print the respective article not only on one but on several or optionally all surfaces. It is particularly preferred that each printing unit is associated with at least one stop element, so that the exact relative positioning according to the invention can be achieved for each printing unit, although the device according to the invention can also have printing units without a stop element.

Dabei ist es besonders bevorzugt, dass mindestens eine Druckeinheit verfahrbar ist, und zwar bevorzugt synchron mit dem mindestens einen, zugeordneten Anschlagelement. Hierdurch lässt sich die Vorrichtung einfach und präzise an unterschiedlichste Abmessungen und Ausgestaltungen zu bedruckender Gegenstände anpassen, ohne dass hiermit ein Verlust an Druckqualität verbunden wäre.It is particularly preferred that at least one printing unit is movable, and preferably synchronously with the at least one associated stop element. As a result, the device can be easily and precisely adapted to a wide variety of dimensions and configurations of objects to be printed, without any loss of print quality being associated therewith.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Fig. 1Fig. 1
zeigt schematisch eine Draufsicht einer Vorrichtung zum Bedrucken von Behältern gemäß einer Ausführungsform der Erfindung;shows schematically a plan view of an apparatus for printing on containers according to an embodiment of the invention;
Fig. 2Fig. 2
zeigt schematisch eine Schnittansicht der in Fig. 1 gezeigten Vorrichtung, wobei der Schnitt in Fig. 1 entlang der Linie II-II geführt ist.schematically shows a sectional view of in Fig. 1 shown device, wherein the cut in Fig. 1 along the line II-II is performed.
Ausführliche Beschreibung bevorzugter AusführungsformenDetailed description of preferred embodiments

Bevorzugte Ausführungsformen der Vorrichtungen zum Einsatz für das erfindungsgemäße Verfahren werden nachfolgend ausführlich unter Bezugnahme auf die begleitenden Zeichnungen beschrieben.Preferred embodiments of the devices for use in the method according to the invention are described in detail below with reference to the accompanying drawings.

Eine Vorrichtung 1 zum Bedrucken von Behältern 2 ist in Fig. 1 und 2 schematisch in einer Draufsicht bzw. einer Schnittansicht gezeigt. Bei dem Behälter 2 handelt es sich in der vorliegenden Ausführungsform um einen Karton mit einer oben gelegenen Einfüllöffnung, der zuvor aus einem Kartonzuschnitt gefaltet wurde. Es ist jedoch zu beachten, dass die vorliegende Erfindung auch auf völlig andersartige Behälter anwendbar ist.An apparatus 1 for printing on containers 2 is shown in FIG Fig. 1 and 2 schematically shown in a plan view and a sectional view. The container 2 in the present embodiment is a carton having an upper feed opening previously folded from a carton blank. It should be noted, however, that the present invention is applicable to completely different types of containers.

Die Vorrichtung 1 besitzt in der vorliegenden Ausführungsform eine Druckeinrichtung 10 mit zwei Druckeinheiten 12, 14, die in der vorliegenden Ausführungsform als Ink-Jet-Druckköpfe mit einer Mehrzahl von Tintenaustrittsöffnungen ausgebildet sind. Die Druckeinheiten 12, 14 stehen jeweils über eine Zuleitung 18 mit einem Tintenvorratsbehälter 16 in Verbindung, obgleich der Tintenvorratsbehälter 16 selbstverständlich auch unmittelbar am Druckkopf 12, 14 angeordnet sein kann.The apparatus 1 in the present embodiment has a printing device 10 with two printing units 12, 14, which are formed in the present embodiment as ink-jet printing heads with a plurality of ink outlet openings. The printing units 12, 14 are in each case via a supply line 18 with an ink reservoir 16 in connection, although the ink reservoir 16 can of course also be arranged directly on the print head 12, 14.

Ferner stehen- die Druckeihneiten 12, 14 jeweils mit einer Druckersteuerung 12', 14' in Verbindung, wobei im Rahmen der vorliegenden Erfindung auch eine einzelne, integrierte Druckersteuerung vorgesehen sein kann, die gegebenenfalls auch die Steuerung der gesamten Vorrichtung übernehmen kann. Ferner ist zu beachten, dass im Rahmen der vorliegenden Erfindung auch andersartige Druckeinrichtungen zum Einsatz kommen können.Furthermore, the Druckeihneiten 12, 14 each with a printer controller 12 ', 14' in connection, which in the context of the present invention, a single, integrated printer control can be provided, which can optionally also take over the control of the entire device. Furthermore, it should be noted that in the context of the present invention, other types of printing devices can also be used.

Darüber hinaus umfasst die Vorrichtung 1 eine Fördereinrichtung 20, um die zu bedruckenden Behälter 2 an den Druckeinheiten 12, 14 entlang zu fördern. Dabei ist die Fördereinrichtung 20 in der vorliegenden Ausführungsform als Riemenförderer mit zwei Förderriemen 22 ausgebildet, obgleich selbstverständlich auch andere Fördereinrichtungen zum Einsatz kommen können, wie Kettenförderer, Schlittenförderer, Luftkissenförder und dergleichen.In addition, the device 1 comprises a conveyor 20 for conveying the containers 2 to be printed on the printing units 12, 14. In this case, the conveyor 20 is formed in the present embodiment as a belt conveyor with two conveyor belt 22, although of course other conveyors can be used, such as chain conveyor, carriage conveyor, air cushion conveyor and the like.

Darüber hinaus ist zu beachten, dass die Fördereinrichtung auch derart ausgebildet sein kann, dass alternativ oder zusätzlich zu einem Fördern des zu bedruckenden Behälters die Druckeinrichtung verfahren wird. Die vorliegende Erfindung kann sich somit sowohl auf Durchlaufmaschinen als auch auf Stationärmaschinen sowie auf Kombinationen hiervon, wie beispielsweise getaktet arbeitende Maschinen, beziehen.In addition, it should be noted that the conveyor may also be designed such that, alternatively or in addition to conveying the container to be printed, the printing device is moved. Thus, the present invention can be applied to both continuous and stationary machines, as well as to combinations thereof, such as clocked machines.

Weiterhin umfasst die Vorrichtung 1 zum Einsatz für das erfindungsgemäße Verfahren eine Positioniereinrichtung 30, die in der vorliegenden Ausführungsform durch zwei seitliche Führungsriemen 32, 34 gebildet ist. Dabei erstreckt sich die Führungsfläche der Führungsriemen 32, 34 im wesentlich senkrecht zur Förderebene der Fördereinrichtung 20. Allgemeiner ausgedrückt erstreckt sich die Führungsfläche der Führungsriemen 32, 34 bzw. allgemeiner Anschlagelemente im wesentlichen parallel zu einer Druckausgabefläche (z. B. Fläche mit Düsenaustrittsöffnungen) der zugeordneten Druckeinheit 12 bzw. 14.Furthermore, the device 1 for use in the method according to the invention comprises a positioning device 30, which in the present embodiment is formed by two lateral guide belts 32, 34. In this case, the guide surface of the guide belts 32, 34 extends substantially perpendicular to the conveying plane of the conveyor 20. More generally, the guide surface of the guide belts 32, 34 or more generally stop elements extends substantially parallel to a print output surface (eg. Surface with nozzle outlet openings) of the associated printing unit 12 or 14.

Die Führungsriemen 32, 34 sind, wie in Fig. 1 am besten zu erkennen ist, durch endlos umlaufende Riemen 32' gebildet, die jeweils um zwei Umlenkrollen 32" gespannt und dazwischen gegebenenfalls über eine Führungsschiene geführt werden. Alternativ oder zusätzlich zu den gezeigten Führungsriemen 32, 34 können selbstverständlich auch andersartige Anschlagelemente als Positioniereinrichtung zum Einsatz kommen, wie beispielsweise Anschlagrollen, Anschlagplatten, Anschlagbolzen oder dergleichen.The guide belts 32, 34 are, as in Fig. 1 can be best seen, formed by endlessly circulating belt 32 ', each about two pulleys 32 "stretched and possibly guided therebetween via a guide rail.Alternatively or in addition to the guide belts 32, 34 shown, of course, other types of stop elements as positioning can be used come, such as stop rollers, stop plates, stop bolts or the like.

Die Führungsriemen 32, 34 sind in Bezug auf die Förderrichtung der zu bedruckenden Gegenstände 2 stromaufwärts der Druckeinheiten 12, 14 angeordnet. Dabei können die Führungsriemen 32, 34 derart justiert werden, dass ihre den zu bedruckenden Gegenständen 2 zugewandte Führungsfläche sich in einem vorbestimmten (orthogonalen) Abstand von den Tintenaustrittsöffnungen der Druckköpfe 12, 14 befindet.The guide belts 32, 34 are arranged upstream of the printing units 12, 14 with respect to the conveying direction of the objects 2 to be printed. In this case, the guide belts 32, 34 can be adjusted such that their guide surfaces facing the objects 2 to be printed are located at a predetermined (orthogonal) distance from the ink outlet openings of the print heads 12, 14.

Von den beiden Führungsriemen 32, 34 ist in der vorliegenden Ausführungsform der Führungsriemen 34 verfahrbar, sodass der Abstand zwischen den Führungsriemen 32, 34 entsprechend der jeweiligen Breite der zu bedruckenden Gegenstände 2 variiert werden kann. Dabei ist auch die Druckeinheit 14 gemeinsam mit bzw. simultan zu dem Führungsriemen 34 verfahrbar, um stets den gewünschten bzw. optimalen (orthogonalen) Abstand zwischen den Tintenaustrittsöffnungen des Druckkopfes 14 und der zu bedruckenden Oberfläche 2' des jeweiligen Gegenstands 2 sicherzustellen.Of the two guide belts 32, 34, the guide belt 34 is movable in the present embodiment, so that the distance between the guide belt 32, 34 can be varied according to the respective width of the objects 2 to be printed. In this case, the printing unit 14 is movable together with or simultaneously to the guide belt 34 in order to always ensure the desired or optimal (orthogonal) distance between the ink outlet openings of the print head 14 and the surface 2 'to be printed of the respective article 2.

Am stromaufwärts gelegenen Ende der Führungsriemen 32, 34 sind darüber hinaus trichterartige Einlaufelemente 24 angeordnet, die dazu beitragen, die durch die Fördereinrichtung 20 geförderten Gegenstände sicher in den Bereich zwischen den Führungsriemen 32, 34 einzuführen.At the upstream end of the guide belts 32, 34 funnel-like inlet elements 24 are also arranged, which help to introduce the conveyed by the conveyor 20 objects safely in the area between the guide belts 32, 34.

Der Betrieb der Fördereinrichtung 20 und der Positioniereinrichtung 30 wird in der vorliegenden Ausführungsform durch eine Maschinensteuerung 4 gesteuert, die jedoch, wie bereits oben angedeutet, gegebenenfalls auch mit der Druckersteuerung 12', 14' zu einer integralen Steuereinheit zusammengefasst sein kann. Dabei ist die Fördergeschwindigkeit der Fördereinrichtung 20 vorteilhaft auf die Fördergeschwindigkeit der Führungsriemen 32, 34 abgestimmt.The operation of the conveyor 20 and the positioning device 30 is controlled in the present embodiment by a machine control 4, which, however, as already indicated above, if necessary, can also be combined with the printer controller 12 ', 14' to form an integral control unit. The conveying speed of the conveyor 20 is advantageously matched to the conveying speed of the guide belts 32, 34.

Stromabwärts der Druckeinheiten 12, 14 sind darüber hinaus in der vorliegenden Ausführungsform zwei Trocknungseinrichtungen 40 angeordnet, die dazu ausgelegt sind, die auf die jeweiligen Gegenstände 2 aufgebrachte Tinte zügig zu trocknen bzw. auszuhärten. Obgleich im Rahmen der Vorrichtung zum Einsatz für das erfindungsgemäße Verfahren ein beliebiges Druckmedium bzw. eine beliebige Drucktinte zum Einsatz kommen kann, hat es sich als vorteilhaft erwiesen, insbesondere bei zu bedruckenden Behältern 2 aus Karton oder dergleichen, eine ölbasierte Tinte einzusetzen. Hierdurch werden mögliche Probleme beim Trocknen bzw. Aushärten von UV-Tinte mittels einer UV-Trocknungseinrichtung vermieden, da sich gezeigt hat, dass die Tinte tief in das Kartonmaterial eindringt und dann einem Trocknungs- bzw. Aushärtungsvorgang durch die UV-Strahlen nicht mehr optimal zugänglich ist.Downstream of the printing units 12, 14, moreover, in the present embodiment, two drying devices 40 are arranged, which are designed to rapidly dry or harden the ink applied to the respective articles 2. Although any printing medium or any printing ink can be used within the scope of the device for use in the method according to the invention, it has proved advantageous to use an oil-based ink, in particular for containers 2 to be printed on cardboard or the like. This avoids possible problems in drying or curing UV ink by means of a UV drying device, since it has been shown that the ink penetrates deeply into the cardboard material and then no longer optimally accessible to a drying or curing process by the UV rays is.

Der Betrieb der Vorrichtung 1 zum Einsatz für das erfindungsgemäße Verfahren vollzieht sich im Rahmen eines integrierten Kundenauslieferungssystems beispielsweise wie folgt. In einem vorgelagerten Prozess werden beispielsweise plattenförmige Werkstücke wie Fußbodenpaneele oder dergleichen produziert, in Kartonbehältern 2 verpackt und zwischengelagert. Dabei werden die Kartonbehälter 2 beispielsweise vorab durch Falten von Kartonzuschnitten in eine Behälterform gebracht.The operation of the device 1 for use in the method according to the invention takes place, for example, in the context of an integrated customer delivery system as follows. In an upstream process, for example, plate-shaped workpieces such as floor panels or the like are produced, packed in cardboard containers 2 and stored temporarily. In this case, the cardboard container 2, for example, brought in advance by folding cardboard blanks in a container shape.

Sobald ein konkreter Kundenauftrag vorliegt und die vom Kunden gewünschte Bemusterung der Behälter 2 bekannt ist, wird die bestellte Anzahl von Behältern 2 der Vorrichtung 1 zugeführt und in den Bereich zwischen den Führungsriemen 32, 34 eingefördert. Dabei kann die Vorrichtung 1 stromaufwärts der Führungsriemen gegebenenfalls die Breite der zu bedruckenden Behälter 2 erfassen und die Position des Führungsriemens 34 zusammen mit der Position der Druckeinheit 14 auf die entsprechende Breite einstellen. Beim Einfördern der Behälter 2 in den Bereich zwischen den Führungsriemen 32, 34 werden die seitlichen Abschnitte der Behälter 2, die durch die in dem Behälter 2 befindlichen Gegenstände häufig seitlich abstehen, in der vorliegenden Ausführungsform verformt und in eine genau definierte Relativpositionierung zu den Düsenaustrittsöffnungen der Druckeinheiten 12 bzw. 14 gebracht.As soon as a specific customer order is received and the customer desired sampling of the container 2 is known, the ordered number of containers 2 of the device 1 is supplied and in the area between the guide belts 32, 34 conveyed. In this case, the device 1 upstream of the guide belt optionally detect the width of the container to be printed 2 and adjust the position of the guide belt 34 together with the position of the printing unit 14 to the appropriate width. When conveying the container 2 in the area between the guide belts 32, 34, the lateral portions of the container 2, which often protrude laterally through the objects located in the container 2, deformed in the present embodiment and in a well-defined relative positioning to the nozzle outlet openings of Pressure units 12 and 14 brought.

Unmittelbar nachdem der Behälter 2 aus dem Bereich zwischen den Führungsriemen 32, 34 austritt, werden die Seitenflächen 2' des Behälters 2 unter Einsatz der Druckeinheiten 12, 14 bedruckt. Anschließend passieren die Behälter 2 die Trocknungseinrichtungen 40, mittels derer die durch die Druckeinheiten 12, 14 aufgebrachte Tinte getrocknet wird, sodass die mit Werkstücken befüllten Behälter 2 unmittelbar anschließend weiterverarbeitet werden können, beispielsweise in eine Klarsichtfolie eingeschweißt werden können.Immediately after the container 2 exits the region between the guide belts 32, 34, the side surfaces 2 'of the container 2 are printed using the printing units 12, 14. Subsequently, the containers 2 pass through the drying devices 40, by means of which the ink applied by the printing units 12, 14 is dried, so that the containers 2 filled with workpieces can be further processed immediately afterwards, for example, welded into a transparent film.

Claims (7)

  1. Process for printing a container (2), in particular a cardboard container, using a device (1) comprising:
    a printing device (10), in particular ink-jet printing device, for printing a surface (2') of the three-dimensional container (2), and
    a conveying device (20) for effecting a relative movement between the printing device (10) and the three-dimensional container (2) to be printed, wherein
    the device also has a positioning device (30) which is equipped to bring the surface (2') to be printed of the three-dimensional container (2) into a predetermined relative relationship, in particular a predetermined distance from the printing device (10),
    in which process the container (2) is brought into the container form, in particular folded, from a blank, in particular a cardboard blank, before printing,
    the container (2) is charged with contents, in particular workpieces, before printing, and
    the surface (2') to be printed of the filled container (2) is deformed by the positioning device (30) before printing.
  2. Process according to claim 1, characterised in that the positioning device (30) has at least one stop element (32, 34).
  3. Process according to claim 1 or 2, characterised in that the positioning device (30) has at least one continuously circulating or rotating stop element, in particular a guide belt (32, 34) or a stop roller.
  4. Process according to one of the preceding claims, characterised in that the positioning device (30) is arranged upstream of the printing device (10) at least in sections with reference to the relative movement between the printing device (10) and the three-dimensional container (2) to be printed.
  5. Process according to one of claims 2 to 4, characterised in that the positioning device (30) has at least two stop elements (32, 34), of which preferably at least one (34) can be moved.
  6. Process according to one of claims 2 to 5, characterised in that the printing device has a plurality of printing units (12, 14), to which in each case at least one stop element (32, 34) is assigned.
  7. Process according to claim 6, characterised in that at least one printing unit (14) can be moved, and specifically preferably synchronously with the at least one assigned stop element (34).
EP07006247A 2007-03-27 2007-03-27 Method for printing on a three-dimensional container Active EP1974928B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP07006247A EP1974928B1 (en) 2007-03-27 2007-03-27 Method for printing on a three-dimensional container
ES07006247T ES2334393T3 (en) 2007-03-27 2007-03-27 DEVICE AND PROCEDURE FOR THE PRINTING OF A THREE-DIMENSIONAL OBJECT.
DE502007002035T DE502007002035D1 (en) 2007-03-27 2007-03-27 Method for printing a three-dimensional container
PL07006247T PL1974928T3 (en) 2007-03-27 2007-03-27 Method for printing on a three-dimensional container
US12/055,904 US8104887B2 (en) 2007-03-27 2008-03-26 Method for imprinting a three-dimensional article
CN2008101003266A CN101274543B (en) 2007-03-27 2008-03-27 Device and method for imprinting a three-dimensional article

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07006247A EP1974928B1 (en) 2007-03-27 2007-03-27 Method for printing on a three-dimensional container

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EP1974928A1 EP1974928A1 (en) 2008-10-01
EP1974928B1 true EP1974928B1 (en) 2009-11-18

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US (1) US8104887B2 (en)
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CN (1) CN101274543B (en)
DE (1) DE502007002035D1 (en)
ES (1) ES2334393T3 (en)
PL (1) PL1974928T3 (en)

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PL1974928T3 (en) 2010-04-30
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ES2334393T3 (en) 2010-03-09
US20080239048A1 (en) 2008-10-02
DE502007002035D1 (en) 2009-12-31
CN101274543B (en) 2011-10-12
US8104887B2 (en) 2012-01-31

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