EP1764217B1 - Printing machine and process to print on objects, especially on textile - Google Patents

Printing machine and process to print on objects, especially on textile Download PDF

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Publication number
EP1764217B1
EP1764217B1 EP05020236A EP05020236A EP1764217B1 EP 1764217 B1 EP1764217 B1 EP 1764217B1 EP 05020236 A EP05020236 A EP 05020236A EP 05020236 A EP05020236 A EP 05020236A EP 1764217 B1 EP1764217 B1 EP 1764217B1
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EP
European Patent Office
Prior art keywords
printing
turntable
workpiece
workpieces
station
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.)
Not-in-force
Application number
EP05020236A
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German (de)
French (fr)
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EP1764217A1 (en
Inventor
Herbert Mayrhofer
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.)
Mhm Siebdruckmaschinen KG GmbH
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Mhm Siebdruckmaschinen KG GmbH
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Application filed by Mhm Siebdruckmaschinen KG GmbH filed Critical Mhm Siebdruckmaschinen KG GmbH
Priority to DE502005006656T priority Critical patent/DE502005006656D1/en
Priority to EP05020236A priority patent/EP1764217B1/en
Priority to AT05020236T priority patent/ATE423003T1/en
Priority to PCT/EP2006/008536 priority patent/WO2007033752A1/en
Publication of EP1764217A1 publication Critical patent/EP1764217A1/en
Priority to HK07110286.5A priority patent/HK1102572A1/en
Application granted granted Critical
Publication of EP1764217B1 publication Critical patent/EP1764217B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/08—Machines
    • B41F15/0863—Machines with a plurality of flat screens mounted on a turntable

Definitions

  • the invention relates to a printing press for printing workpieces, in particular textiles, with a machine bed, a plurality of screen printing stations, which are arranged together on a turntable, which is mounted on the machine bed, a turntable, which has a plurality of workpiece carriers and rotatable on the machine bed about an axis of rotation is stored and driven for the gradual conveying of the workpieces to the screen printing stations, and a lifting device for axially moving the turntable with the screen printing stations relative to the turntable, wherein the printing plate for printing the turntable approximated and is removed for gradual conveying from the turntable.
  • the invention further relates to a method for printing on workpieces, in particular textiles, wherein the workpieces are mounted on workpiece carriers, which are arranged on a turntable, which is rotatably mounted on a machine bed, the workpieces are conveyed by stepwise driving the turntable to working positions at which the workpieces are each printed by a screen printing station, which are arranged on a common pressure plate, is approximated for printing the pressure plate by means of a lifting device relative to the turntable and is removed for stepwise further conveying the turntable relative to the turntable.
  • Such machines are known as so-called carousel screen printing machines and are used in particular in the printing of textiles in medium and large quantities efficiently. If a change or even a change in the motif to be printed is made, it is necessary to remove one or more screen printing stencils in the screen printing stations and to use a corresponding new or modified screen stencil. In the case of frequent motif changes or even the printing of individual motifs, a generic carousel screen printing machine can hardly be used efficiently.
  • a generic screen printing device which has a plurality of screen printing stations, a printing table with arranged on this workpiece carriers and a lifting device for the axial displacement of the printing table.
  • the US 6,397,740 discloses a screen printing apparatus in which at least one digital printing station is arranged in addition to screen printing stations.
  • the invention has for its object to provide a printing press and a printing method, which allow a particularly efficient operation.
  • the printing machine is characterized in that at least one digital printing station is arranged with at least one controllable jet nozzle for supplementary printing of the workpieces.
  • the digital printing station allows an efficient and flexible change or adaptation of an imprint on the workpiece to be printed. For example, a serial number, a date, a supplementary logo, a name, etc. can also be printed on the screen-printed motif. Also can without further desired modifications or overlaps are made to the standard motif to be applied by the screen printing stations. This is done by simple electronic control of the digital printing station. It is not necessary to interrupt the printing operation by exchanging screen printing stencils, which considerably increases the efficiency of the printing press. Regarding the relative lifting movement, this can be effected by moving the pressure plates and / or the turntable.
  • the printing machine according to the invention is further characterized in that the at least one digital printing station when printing a workpiece with its workpiece carrier force and / or positively coupled can be coupled.
  • This can be achieved by pressure elements, extendable bolts, clamping jaws or other coupling elements, in particular at the printing station. take place, wherein the digital printing station is additionally firmly connected to the workpiece carrier. This counteracts the occurrence of vibrations between the workpiece carrier and the digital printing station. This ensures a high print quality.
  • the at least one digital printing station is stored separately from the printing plate with the screen printing stations.
  • the printing plate with the screen printing stations is moved axially up and down, while the turntable is driven in rotation with the star-shaped projecting workpiece carriers in the start-stop mode.
  • This can cause vibrations of the overall construction.
  • these play a minor role in screen printing for operational reasons, since the screen printing station with the screen printing stencil is placed directly on the workpiece.
  • the at least one ink jet nozzle is operationally spaced from the workpiece so that vibrations occurring here can have a significant influence on the print quality.
  • a digital printing station on the printing plate in place of a screen printing station and optionally decouple by interposing a damping element vibrationally from the pressure plate.
  • the pressure plate is connected above the printing table with the machine bed and that the at least one digital printing station below the turntable connected to the machine bed or stored separately from the machine bed directly on the ground. In this way, a transfer of the significant oscillations in the upper part of a carousel printing press to the digital printing station is largely avoided.
  • the immediate location of the digital printing station on the lower machine bed leads to improved rigidity of the storage of the digital printing station.
  • the digital printing station can be set up and attached directly to the ground as a separate element separate from the machine bed. As a result, practically a complete vibration decoupling is achieved.
  • the workpiece carrier and / or the workpiece can be provided with a marking and that the at least one digital printing station has a sensor for detecting the marking and an adjusting device, with which the at least one jet nozzle is adjustable.
  • the at least one digital printing station has a sensor for detecting the marking and an adjusting device, with which the at least one jet nozzle is adjustable.
  • the at least one jet nozzle is height-adjustable relative to the workpiece.
  • the inking performance can be changed, in particular increased. If the distance is increased, the spray cone covers a larger area on the workpiece.
  • the ink throughput can be increased simultaneously with a larger distance of the jet nozzle to the workpiece, so that further sufficient application of the pressure medium is achieved.
  • a graphic special effect such as a mist formation, can be achieved.
  • An advantageous aspect of the invention further lies in the fact that the power stroke of the screen printing stations and the at least one digital printing station is the same, in particular between 0.5 and 5 seconds, preferably between 1 and 2 seconds.
  • the working cycle of the entire machine is still ensured by the fast and thereby shortest working cycle of the screen printing station.
  • the digital printing station has to adhere to this printing speed, wherein due to the generally slower operation of the digital printing station, if necessary, a plurality of jet nozzles or a plurality of digital printing stations are provided, which each apply partial images. about an electronic control are switched on these additional jet nozzles and / or digital printing stations and the additional image to be applied, if necessary, divided into sub-images.
  • each digital printing station can have different types of nozzles, which can be used alternatively or in combination.
  • the invention is characterized in that the workpiece is additionally printed by at least one digital printing station, which has at least one controllable jet nozzle. According to this method, printing can be performed with the above-described printing machine. This results in the above-described advantages.
  • a preferred embodiment of the method according to the invention is that a control for the at least one digital printing station is provided, through which the workpieces are individually printed differently.
  • the machine can therefore be used flexibly, but conversions are avoided by the digital printing station.
  • a high operating speed of the printing press is ensured according to the invention in that a controller for a plurality of digital printing stations is provided which divides a print job among the plurality of digital printing stations according to a predetermined power stroke.
  • the working cycle is determined by the operating speed of the screen printing stations. hereby the performance of the entire machine remains as in a conventional carousel screen printing machine.
  • the FIG. 1 shows a printing machine 50, which belongs to the type of carousel screen printing machines.
  • the printing machine 50 comprises, as essential components, a machine bed 12, which is constructed from a central, approximately circular base frame 14 and three machine feet 16 attached thereto, a turntable 20 rotatable relative to the machine bed 12 and a pressure plate 40 arranged above it with screen printing stations 42 arranged in a star shape thereon.
  • a torsionally rigid machine shaft 18 is formed, which extends vertically upwards.
  • the turntable 20 is arranged, which in the illustrated embodiment has a conical bell 21 with a horizontally arranged base plate 23. Starting from the bottom plate 23 extend radially outwardly a plurality of rod-shaped struts 33, which support radially arranged rod-shaped arms 32. At the star-shaped, arranged at the same angular distance arms 32 are at the outward directed free ends workpiece carrier 34 which serve to receive a printed material, such as a T-shirt.
  • the respectively associated screen printing stations 42 are attached to the printing plate 40.
  • the screen printing stations 42 are formed as identically constructed modules with a screen corresponding to the desired print image, an inking member and a squeegee device for spreading the ink on the screen for transferring the ink to the print material.
  • the pressure plate 40 is rotatably connected via a connecting hub 44 with a Hubschaft 46.
  • the stroke shaft 46 directed coaxially with the machine shaft 18 is axially displaceable relative to the machine bed 12 by means of a lifting device, not shown, in particular a hydraulic cylinder.
  • the printing plate 40 is lowered with the screen printing stations 42 to the arranged on the workpiece carriers 34 print material so to carry out a printing operation, so that the desired print image can be transmitted.
  • the printing plate 40 is moved vertically upwards with the screen printing stations 42, so that the screen printing stations 42 are spaced from the workpiece carriers 34.
  • a further rotation of the turntable 20 by a clock step with a predetermined rotation angle so that then again by lowering the pressure plate, a further printing step can be performed.
  • a rotary indexing device 10 is provided in an annular recess of the machine bed 12.
  • the bottom plate 23 of the turntable 20 directly to a disk-shaped rotor 28 of a Electric motor attached.
  • an annular stator 26 with the electrical windings and the corresponding power supply is arranged on the machine bed 12.
  • the rotor 28 and the stator 26 form an electric drive 24 of the rotary indexing device 10.
  • this direct drive other types of drive can be used.
  • the printing press 50 has a total of ten screen-printing stations 42 arranged in a star shape relative to the rotation axis 22, which are fastened along the circumference of the pressure plate 40.
  • Rotatable about the axis of rotation 22 a total of ten star-shaped arranged workpiece carrier 34 are arranged.
  • the workpieces are clamped on the workpiece carriers 34.
  • stepwise rotation in a clockwise direction the workpiece passes through the individual screen printing stations 42, in each of which an imprint can be made.
  • two digital printing stations 60 are arranged, which are mounted directly on the floor separately from the machine bed.
  • the position of the digital printing stations 60 is centered corresponding to the axis of rotation 22, so that the workpieces to be printed with the workpiece carriers 34 centered under the digital printing stations 60 can be moved. In this way, for example, an individual order, a running number or a name can be printed according to an individual tax specification.
  • the workpiece is rotated to the output A, in which the printed workpiece can be removed.
  • one or more drying stations could be arranged along the circumference of the machine, which would correspondingly reduce the number of printing stations.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Printing Methods (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Screen Printers (AREA)
  • Coloring (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

The fabric printing machine has an upper turntable (40) on which silk screen printing stations (42) are mounted. A lower turntable is fitted with workpiece carriers (34) and the upper turntable can be lowered on to this to print the workpieces. Digital printing units (60) are mounted on the workpiece carriers to complete printing of the textiles. An independent claim is included for a method for printing textiles using the machine.

Description

Die Erfindung betrifft eine Druckmaschine zum Bedrucken von Werkstücken, insbesondere Textilien, mit einem Maschinenbett, mehreren Siebdruckstationen, die gemeinsam an einem Drehteller angeordnet sind, der am Maschinenbett gelagert ist, einem Drehtisch, welcher eine Vielzahl von Werkstückträgern aufweist und am Maschinenbett um eine Drehachse drehbar gelagert und zum schrittweisen Fördern der Werkstücke zu den Siebdruckstationen angetrieben ist, und einer Hubeinrichtung zum axialen Verschieben des Drehtellers mit den Siebdruckstationen relativ zum Drehtisch, wobei der Druckteller zum Bedrucken dem Drehtisch angenähert und zum schrittweisen Fördern vom Drehtisch entfernt wird.The invention relates to a printing press for printing workpieces, in particular textiles, with a machine bed, a plurality of screen printing stations, which are arranged together on a turntable, which is mounted on the machine bed, a turntable, which has a plurality of workpiece carriers and rotatable on the machine bed about an axis of rotation is stored and driven for the gradual conveying of the workpieces to the screen printing stations, and a lifting device for axially moving the turntable with the screen printing stations relative to the turntable, wherein the printing plate for printing the turntable approximated and is removed for gradual conveying from the turntable.

Die Erfindung betrifft weiterhin ein Verfahren zum Bedrucken von Werkstücken, insbesondere Textilien, wobei die Werkstücke auf Werkstückträgern aufgespannt werden, welche an einem Drehtisch angeordnet sind, welcher an einem Maschinenbett drehbar gelagert ist, die Werkstücke durch schrittweises Antreiben des Drehtisches zu Arbeitspositionen gefördert werden, an welchen die Werkstücke jeweils durch eine Siebdruckstation bedruckt werden, welche an einem gemeinsamen Druckteller angeordnet sind, zum Bedrucken der Druckteller mittels einer Hubeinrichtung relativ an den Drehtisch angenähert wird und zum schrittweisen Weiterfördern der Drehteller relativ vom Drehtisch entfernt wird.The invention further relates to a method for printing on workpieces, in particular textiles, wherein the workpieces are mounted on workpiece carriers, which are arranged on a turntable, which is rotatably mounted on a machine bed, the workpieces are conveyed by stepwise driving the turntable to working positions at which the workpieces are each printed by a screen printing station, which are arranged on a common pressure plate, is approximated for printing the pressure plate by means of a lifting device relative to the turntable and is removed for stepwise further conveying the turntable relative to the turntable.

Derartige Maschinen sind als sogenannte Karussell-Siebdruckmaschinen bekannt und werden insbesondere beim Bedrucken von Textilien in mittleren und großen Stückzahlen effizient eingesetzt. Erfolgt ein Wechsel oder auch nur eine Änderung des zu bedruckenden Motives, ist es erforderlich, bei diesen Maschinen eine oder mehrere Siebdruckschablonen in den Siebdruckstationen auszubauen und eine entsprechende neue oder geänderte Siebdruckschablone einzusetzen. Bei einem häufigen Motivwechsel oder gar dem Bedrucken individueller Motive ist eine gattungsgemäße Karussell-Siebdruckmaschine kaum effizient einsetzbar.Such machines are known as so-called carousel screen printing machines and are used in particular in the printing of textiles in medium and large quantities efficiently. If a change or even a change in the motif to be printed is made, it is necessary to remove one or more screen printing stencils in the screen printing stations and to use a corresponding new or modified screen stencil. In the case of frequent motif changes or even the printing of individual motifs, a generic carousel screen printing machine can hardly be used efficiently.

Aus der US 6,408,745 ist eine gattungsgemäße Siebdruckvorrichtung bekannt, die eine Vielzahl von Siebdruckstationen, einen Drucktisch mit an diesem angeordneten Werkstückträgern und eine Hubeinrichtung zum axialen Verschieben des Drucktisches aufweist.From the US 6,408,745 a generic screen printing device is known which has a plurality of screen printing stations, a printing table with arranged on this workpiece carriers and a lifting device for the axial displacement of the printing table.

Die US 6,397,740 offenbart eine Siebdruckvorrichtung, bei der zusätzlich zu Siebdruckstationen mindestens eine digitale Druckstation angeordnet ist.The US 6,397,740 discloses a screen printing apparatus in which at least one digital printing station is arranged in addition to screen printing stations.

Aus der NL 9201679 ist eine kombinierte Druckvorrichtung bekannt, bei der sowohl Siebdruckeinrichtungen als auch Tintenstrahldruckeinrichtugnen vorgesehen sind.From the NL 9201679 For example, a combined printing device is known in which both screen printing devices and ink jet printing devices are provided.

Der Erfindung liegt die Aufgabe zugrunde, eine Druckmaschine und ein Druckverfahren anzugeben, welche einen besonders effizienten Betrieb erlauben.The invention has for its object to provide a printing press and a printing method, which allow a particularly efficient operation.

Die Aufgabe wird nach der Erfindung durch eine Druckmaschine mit den Merkmalen des Anspruchs 1 und durch ein Verfahren mit den Merkmalen des Anspruchs 7 gelöst. Bevorzugte Ausführungsformen sind in den jeweiligen abhängigen Ansprüchen angegeben.The object is achieved according to the invention by a printing machine having the features of claim 1 and by a method having the features of claim 7. Preferred embodiments are given in the respective dependent claims.

Die erfindungsgemäße Druckmaschine ist dadurch gekennzeichnet, dass mindestens eine digitale Druckstation mit mindestens einer ansteuerbaren Strahldüse zum ergänzenden Bedrucken der Werkstücke angeordnet ist. Die digitale Druckstation erlaubt eine effiziente und flexible Änderung oder Anpassung eines Aufdruckes auf dem zu bedruckenden Werkstück. So kann etwa eine laufende Nummer, ein Datum, ein ergänzendes Logo, ein Name etc. zusätzlich auf das durch Siebdruck aufgebrachte Motiv aufgedruckt werden. Auch können ohne weiteres gewünschte Abänderungen oder Überdeckungen an dem durch die Siebdruckstationen aufzubringenden Standardmotiv durchgeführt werden. Dies erfolgt durch einfache elektronische Ansteuerung der digitalen Druckstation. Eine Unterbrechung des Druckbetriebes durch Austausch von Siebdruckschablonen ist dabei nicht erforderlich, was die Effizienz der Druckmaschine erheblich erhöht. Betreffend die relative Hubbewegung kann diese durch Verfahren der Druckteller und/ oder des Drehtisches bewirkt werden.The printing machine according to the invention is characterized in that at least one digital printing station is arranged with at least one controllable jet nozzle for supplementary printing of the workpieces. The digital printing station allows an efficient and flexible change or adaptation of an imprint on the workpiece to be printed. For example, a serial number, a date, a supplementary logo, a name, etc. can also be printed on the screen-printed motif. Also can without further desired modifications or overlaps are made to the standard motif to be applied by the screen printing stations. This is done by simple electronic control of the digital printing station. It is not necessary to interrupt the printing operation by exchanging screen printing stencils, which considerably increases the efficiency of the printing press. Regarding the relative lifting movement, this can be effected by moving the pressure plates and / or the turntable.

Die erfindungsgemäße Druckmaschine ist ferner dadurch gekennzeichnet, dass die mindestens eine digitale Druckstation beim Bedrucken eines Werkstückes mit dessen Werkstückträger kraft- und/oder formschlüssig koppelbar ist. Dies kann etwa durch Andruckelemente, ausfahrbare Bolzen, Spannklauen oder sonstige Koppelelemente, insbesondere an der Druckstation. erfolgen, wobei die digitale Druckstation mit dem Werkstückträger zusätzlich fest verbunden wird. Dies wirkt dem Auftreten von Schwingungen zwischen dem Werkstückträger und der digitalen Druckstation entgegen. Dies sichert eine hohe Druckqualität.The printing machine according to the invention is further characterized in that the at least one digital printing station when printing a workpiece with its workpiece carrier force and / or positively coupled can be coupled. This can be achieved by pressure elements, extendable bolts, clamping jaws or other coupling elements, in particular at the printing station. take place, wherein the digital printing station is additionally firmly connected to the workpiece carrier. This counteracts the occurrence of vibrations between the workpiece carrier and the digital printing station. This ensures a high print quality.

Eine Verbesserung gegenüber dem Einfluss unerwünschter Schwingungen wird erfindungsgemäß dadurch erreicht, dass die mindestens eine digitale Druckstation getrennt von dem Druckteller mit den Siebdruckstationen gelagert ist. Der Druckteller mit den Siebdruckstationen wird axial auf- und abbewegt, während der Drehtisch mit den sternförmig auskragenden Werkstückträgern drehend im Start-Stopp-Betrieb angetrieben ist. Hierdurch können Schwingungen der Gesamtkonstruktion entstehen. Diese spielen zwar betriebsbedingt beim Siebdrucken eine geringe Rolle, da die Siebdruckstation mit der Siebdruckschablone unmittelbar am Werkstück aufgesetzt wird. Bei der digitalen Druckstation hingegen ist die mindestens eine Tintenstrahldüse betriebsbedingt vom Werkstück beabstandet, so dass auftretende Schwingungen hier einen erheblichen Einfluss auf die Druckqualität nehmen können. Durch die Entkopplung der digitalen Druckstation von dem Druckteller mit den Siebdruckstationen kann dem Auftreten von unerwünschten Schwingungen an der digitalen Druckstation wesentlich entgegengewirkt werden.An improvement over the influence of unwanted vibrations is inventively achieved in that the at least one digital printing station is stored separately from the printing plate with the screen printing stations. The printing plate with the screen printing stations is moved axially up and down, while the turntable is driven in rotation with the star-shaped projecting workpiece carriers in the start-stop mode. This can cause vibrations of the overall construction. Although these play a minor role in screen printing for operational reasons, since the screen printing station with the screen printing stencil is placed directly on the workpiece. In contrast, in the case of the digital printing station, the at least one ink jet nozzle is operationally spaced from the workpiece so that vibrations occurring here can have a significant influence on the print quality. By decoupling the digital printing station from the printing plate with the screen printing stations, the occurrence of undesired vibrations at the digital printing station can be substantially counteracted.

Grundsätzlich ist es zwar möglich, eine digitale Druckstation am Druckteller an Stelle einer Siebdruckstation anzubringen und gegebenenfalls durch Zwischenschaltung eines Dämpfungselementes schwingungsmäßig vom Druckteller zu entkoppeln. Jedoch ist es nach der Erfindung bevorzugt, dass der Druckteller oberhalb des Drucktisches mit dem Maschinenbett verbunden ist und dass die mindestens eine digitale Druckstation unterhalb des Drehtisches mit dem Maschinenbett verbunden oder getrennt von dem Maschinenbett unmittelbar am Boden gelagert ist. Auf diese Weise wird ein Übertragen der nicht unerheblichen Schwingungen im oberen Bereich einer Karussell-Druckmaschine auf die digitale Druckstation weitgehend vermieden. Die unmittelbare Anordnung der digitalen Druckstation am unteren Maschinenbett führt zu einer verbesserten Steifigkeit der Lagerung der digitalen Druckstation. Gleichzeitig wird dabei weiter eine definierte Lage der digitalen Druckstation gegenüber den anderen Maschinenelementen gewährleistet. Alternativ kann die digitale Druckstation jedoch als ein separates Element getrennt von dem Maschinenbett unmittelbar am Boden aufgestellt und befestigt werden. Hierdurch wird praktisch eine vollständige Schwingungsentkopplung erreicht.In principle, it is possible to attach a digital printing station on the printing plate in place of a screen printing station and optionally decouple by interposing a damping element vibrationally from the pressure plate. However, it is preferred according to the invention that the pressure plate is connected above the printing table with the machine bed and that the at least one digital printing station below the turntable connected to the machine bed or stored separately from the machine bed directly on the ground. In this way, a transfer of the significant oscillations in the upper part of a carousel printing press to the digital printing station is largely avoided. The immediate location of the digital printing station on the lower machine bed leads to improved rigidity of the storage of the digital printing station. At the same time while a defined position of the digital printing station is guaranteed over the other machine elements. Alternatively, however, the digital printing station can be set up and attached directly to the ground as a separate element separate from the machine bed. As a result, practically a complete vibration decoupling is achieved.

Zur Verbesserung der Druckqualität des Gesamtdruckes ist es erfindungsgemäß, dass der Werkstückträger und/oder das Werkstück mit einer Markierung versehbar ist und dass die mindestens eine digitale Druckstation einen Sensor zum Erkennen der Markierung und eine Justiereinrichtung aufweist, mit welcher die mindestens eine Strahldüse justierbar ist. Hierdurch wird eine exakte Ausrichtung der einzelnen Aufdrucke durch die digitale Druckstation erreicht.To improve the print quality of the total pressure, it is according to the invention that the workpiece carrier and / or the workpiece can be provided with a marking and that the at least one digital printing station has a sensor for detecting the marking and an adjusting device, with which the at least one jet nozzle is adjustable. As a result, an exact alignment of the individual imprints is achieved by the digital printing station.

Nach der Erfindung ist es vorteilhaft, dass zur Einstellung der Druckleistung die mindestens eine Strahldüse relativ zum Werkstück höhenverstellbar ist. Durch eine Höhenverstellbarkeit der Strahldüse, insbesondere während des linien- oder zeilenförmigen Druckauftrages kann die Farbauftragsleistung verändert, insbesondere erhöht, werden. Wird der Abstand erhöht, deckt der Sprühkegel eine größere Fläche auf dem Werkstück ab. Gegebenenfalls kann gleichzeitig mit einem größeren Abstand der Strahldüse zum Werkstück auch der Tintendurchsatz erhöht werden, so dass weiterhin ein ausreichender Auftrag des Druckmediums erreicht wird. Alternativ kann aber mit einer Höhenverstellung und einer Absenkung des Farbdurchtrittes ein graphischer Spezialeffekt, etwa eine Nebelbildung, erreicht werden.According to the invention, it is advantageous that for adjusting the pressure output, the at least one jet nozzle is height-adjustable relative to the workpiece. By a height adjustment of the jet nozzle, in particular during the line or line-shaped print job, the inking performance can be changed, in particular increased. If the distance is increased, the spray cone covers a larger area on the workpiece. Optionally, the ink throughput can be increased simultaneously with a larger distance of the jet nozzle to the workpiece, so that further sufficient application of the pressure medium is achieved. Alternatively, however, with a height adjustment and a reduction of the color passage, a graphic special effect, such as a mist formation, can be achieved.

Ein vorteilhafter Aspekt der Erfindung liegt weiterhin darin, dass der Arbeitstakt der Siebdruckstationen und der mindestens einen digitalen Druckstation gleich ist, insbesondere zwischen 0,5 bis 5 Sekunden, vorzugsweise zwischen 1 bis 2 Sekunden, beträgt. Der Arbeitstakt der gesamten Maschine wird dabei weiterhin durch den schnellen und dabei kürzesten Arbeitstakt der Siebdruckstation gewährleistet. Die digitale Druckstation hat sich an diese Druckgeschwindigkeit zu halten, wobei wegen der grundsätzlich langsameren Arbeitsweise der digitalen Druckstation nötigenfalls mehrere Strahldüsen oder mehrere digitale Druckstationen vorgesehen sind, welche jeweils Teilbilder auftragen. Über eine elektronische Steuerung werden diese zusätzlichen Strahldüsen und/oder digitalen Druckstationen zugeschaltet und das zusätzlich aufzubringende Druckbild nötigenfalls in Teilbilder aufgeteilt.An advantageous aspect of the invention further lies in the fact that the power stroke of the screen printing stations and the at least one digital printing station is the same, in particular between 0.5 and 5 seconds, preferably between 1 and 2 seconds. The working cycle of the entire machine is still ensured by the fast and thereby shortest working cycle of the screen printing station. The digital printing station has to adhere to this printing speed, wherein due to the generally slower operation of the digital printing station, if necessary, a plurality of jet nozzles or a plurality of digital printing stations are provided, which each apply partial images. about an electronic control are switched on these additional jet nozzles and / or digital printing stations and the additional image to be applied, if necessary, divided into sub-images.

Als Druckmedium kann nicht nur Farbe sondern auch eine Grundierung, Imprägnierung, Haftmittel, Fasern, Flocken und andere Beschichtungen aufgetragen werden. Hierfür kann jede digitale Druckstation verschiedene Düsenarten aufweisen, die alternativ oder in Kombination einsetzbar sind.As the printing medium, not only paint but also a primer, impregnation, adhesive, fibers, flakes and other coatings can be applied. For this purpose, each digital printing station can have different types of nozzles, which can be used alternatively or in combination.

Betreffend das Verfahren ist die Erfindung dadurch gekennzeichnet, dass das Werkstück zusätzlich durch mindestens eine digitale Druckstation bedruckt wird, welche mindestens eine ansteuerbare Strahldüse aufweist. Gemäß diesem Verfahren kann ein Bedrucken mit der vorbeschriebenen Druckmaschine durchgeführt werden. Es ergeben sich dabei die vorbeschriebenen Vorteile.Regarding the method, the invention is characterized in that the workpiece is additionally printed by at least one digital printing station, which has at least one controllable jet nozzle. According to this method, printing can be performed with the above-described printing machine. This results in the above-described advantages.

Eine bevorzugte Weiterbildung des Verfahrens besteht nach der Erfindung darin, dass eine Steuerung für die mindestens eine digitale Druckstation vorgesehen ist, durch welche die Werkstücke individuell unterschiedlich bedruckt werden. Die Maschine ist damit flexibel einsetzbar, wobei jedoch durch die digitale Druckstation Umrüstvorgänge vermieden werden.A preferred embodiment of the method according to the invention is that a control for the at least one digital printing station is provided, through which the workpieces are individually printed differently. The machine can therefore be used flexibly, but conversions are avoided by the digital printing station.

Eine hohe Arbeitsgeschwindigkeit der Druckmaschine wird nach der Erfindung dadurch gewährleistet, dass eine Steuerung für mehrere digitale Druckstationen vorgesehen ist, welche entsprechend einem vorgegebenen Arbeitstakt einen Druckauftrag unter den mehreren digitalen Druckstationen aufteilt. Der Arbeitstakt wird dabei von der Arbeitsgeschwindigkeit der Siebdruckstationen vorgegeben. Hierdurch bleibt die Leistungsfähigkeit der Gesamtmaschine wie bei einer sonst üblichen Karussell-Siebdruckmaschine erhalten.A high operating speed of the printing press is ensured according to the invention in that a controller for a plurality of digital printing stations is provided which divides a print job among the plurality of digital printing stations according to a predetermined power stroke. The working cycle is determined by the operating speed of the screen printing stations. hereby the performance of the entire machine remains as in a conventional carousel screen printing machine.

Die Erfindung wird nachfolgend anhand eines bevorzugten Ausführungsbeispieles beschrieben, welche schematisch in den Zeichnungen dargestellt ist. In den Zeichnungen zeigen:

Fig. 1
eine geschnittene Seitenansicht einer erfindungsgemäßen Druckmaschine; und
Fig. 2
eine schematisierte Draufsicht auf die Rundtaktvorrichtung gemäß Fig. 1.
The invention will be described below with reference to a preferred embodiment, which is shown schematically in the drawings. In the drawings show:
Fig. 1
a sectional side view of a printing machine according to the invention; and
Fig. 2
a schematic plan view of the rotary indexing device according to Fig. 1 ,

Die Figur 1 zeigt eine Druckmaschine 50, welche zur Gattung der Karussell-Siebdruckmaschinen gehört. Die Druckmaschine 50 umfasst als wesentliche Komponenten ein Maschinenbett 12, welches aus einem mittigem, etwa kreisförmigen Grundgestell 14 und drei daran befestigten Maschinenfüßen 16 aufgebaut ist, einem gegenüber dem Maschinenbett 12 drehbaren Drehtisch 20 und einem darüber angeordneten Druckteller 40 mit daran sternförmig angeordneten Siebdruckstationen 42.The FIG. 1 shows a printing machine 50, which belongs to the type of carousel screen printing machines. The printing machine 50 comprises, as essential components, a machine bed 12, which is constructed from a central, approximately circular base frame 14 and three machine feet 16 attached thereto, a turntable 20 rotatable relative to the machine bed 12 and a pressure plate 40 arranged above it with screen printing stations 42 arranged in a star shape thereon.

Mittig im Maschinenbett 12 ist ein drehfester Maschinenschaft 18 ausgebildet, welcher sich vertikal nach oben erstreckt. Um diesen Maschinenschaft 18 ist der Drehtisch 20 angeordnet, welcher bei der dargestellten Ausführungsform eine konische Glocke 21 mit einer horizontal angeordneten Bodenplatte 23 aufweist. Ausgehend von der Bodenplatte 23 erstrecken sich radial nach außen eine Vielzahl stabförmiger Streben 33, welche radial angeordnete, stangenförmige Arme 32 abstützen. An den sternförmig, mit gleichem Winkelabstand angeordneten Armen 32 sind an den nach außen gerichteten freien Enden Werkstückträger 34 angeordnet, welche zur Aufnahme eines Druckgutes, beispielsweise eines T-Shirtes dienen.Centered in the machine bed 12, a torsionally rigid machine shaft 18 is formed, which extends vertically upwards. To this machine shaft 18, the turntable 20 is arranged, which in the illustrated embodiment has a conical bell 21 with a horizontally arranged base plate 23. Starting from the bottom plate 23 extend radially outwardly a plurality of rod-shaped struts 33, which support radially arranged rod-shaped arms 32. At the star-shaped, arranged at the same angular distance arms 32 are at the outward directed free ends workpiece carrier 34 which serve to receive a printed material, such as a T-shirt.

Oberhalb der Werkstückträger 34 sind an dem Druckteller 40 die jeweils dazugehörigen Siebdruckstationen 42 befestigt. Beim vorliegenden Ausführungsbeispiel sind die Siebdruckstationen 42 als gleich aufgebaute Module mit einem dem gewünschten Druckbild entsprechenden Sieb, einem Farbauftragsorgan sowie einer Rakeleinrichtung zum Verstreichen der Farbe auf dem Sieb zur Übertragung der Farbe auf das Druckgut ausgebildet. Der Druckteller 40 ist über eine Verbindungsnabe 44 drehfest mit einem Hubschaft 46 verbunden. Der koaxial zum Maschinenschaft 18 gerichtete Hubschaft 46 ist mittels einer nicht dargestellten Hubeinrichtung, insbesondere einem Hydraulikzylinder, gegenüber dem Maschinenbett 12 axial verschiebbar. In bekannter Weise wird so zum Durchführen eines Druckvorganges der Druckteller 40 mit den Siebdruckstationen 42 auf das an den Werkstückträgern 34 angeordnete Druckgut abgesenkt, so dass das gewünschte Druckbild übertragen werden kann. Nach Abschluss des Druckschrittes wird der Druckteller 40 mit den Siebdruckstationen 42 vertikal nach oben verfahren, so dass die Siebdruckstationen 42 von den Werkstückträgern 34 beabstandet sind. Sodann kann eine Weiterdrehung des Drehtisches 20 um einen Taktschritt mit vorgegebenem Drehwinkel erfolgen, so dass dann erneut durch Absenken des Drucktellers ein weiterer Druckschritt durchgeführt werden kann.Above the workpiece carrier 34, the respectively associated screen printing stations 42 are attached to the printing plate 40. In the present embodiment, the screen printing stations 42 are formed as identically constructed modules with a screen corresponding to the desired print image, an inking member and a squeegee device for spreading the ink on the screen for transferring the ink to the print material. The pressure plate 40 is rotatably connected via a connecting hub 44 with a Hubschaft 46. The stroke shaft 46 directed coaxially with the machine shaft 18 is axially displaceable relative to the machine bed 12 by means of a lifting device, not shown, in particular a hydraulic cylinder. In a known manner, the printing plate 40 is lowered with the screen printing stations 42 to the arranged on the workpiece carriers 34 print material so to carry out a printing operation, so that the desired print image can be transmitted. After completion of the printing step, the printing plate 40 is moved vertically upwards with the screen printing stations 42, so that the screen printing stations 42 are spaced from the workpiece carriers 34. Then, a further rotation of the turntable 20 by a clock step with a predetermined rotation angle, so that then again by lowering the pressure plate, a further printing step can be performed.

Zum Antreiben des Drehtisches 20 ist eine Rundtaktvorrichtung 10 in einer ringförmigen Ausnehmung des Maschinenbettes 12 vorgesehen. Dabei ist die Bodenplatte 23 des Drehtisches 20 unmittelbar an einem scheibenförmigen Rotor 28 eines Elektromotors befestigt. Korrespondierend zu dem Rotor 28 ist am Maschinenbett 12 ein ringförmiger Stator 26 mit den elektrischen Wicklungen und der entsprechenden Stromversorgung angeordnet. Der Rotor 28 und der Stator 26 bilden einen elektrischen Antrieb 24 der Rundtaktvorrichtung 10. Anstelle dieses Direktantriebes können auch andere Antriebsarten eingesetzt werden.For driving the turntable 20, a rotary indexing device 10 is provided in an annular recess of the machine bed 12. In this case, the bottom plate 23 of the turntable 20 directly to a disk-shaped rotor 28 of a Electric motor attached. Corresponding to the rotor 28, an annular stator 26 with the electrical windings and the corresponding power supply is arranged on the machine bed 12. The rotor 28 and the stator 26 form an electric drive 24 of the rotary indexing device 10. Instead of this direct drive other types of drive can be used.

Gemäß der schematischen Darstellung von Fig. 2 weist die Druckmaschine 50 insgesamt zehn sternförmig zur Drehachse 22 angeordnete Siebdruckstationen 42 auf, welche entlang des Umfangs des Drucktellers 40 befestigt sind. Drehbar um die Drehachse 22 sind insgesamt zehn sternförmige angeordnete Werkstückträger 34 angeordnet.According to the schematic representation of Fig. 2 the printing press 50 has a total of ten screen-printing stations 42 arranged in a star shape relative to the rotation axis 22, which are fastened along the circumference of the pressure plate 40. Rotatable about the axis of rotation 22 a total of ten star-shaped arranged workpiece carrier 34 are arranged.

An einer Eingabe E werden die Werkstücke auf den Werkstückträgern 34 aufgespannt. Durch schrittweises Drehen im Uhrzeigersinn durchläuft das Werkstück so die einzelnen Siebdruckstationen 42, in welchen jeweils ein Aufdruck erfolgen kann. Nach der zehnten Siebdruckstation 42 sind zwei digitale Druckstationen 60 angeordnet, welche unmittelbar auf dem Boden getrennt vom Maschinenbett gelagert sind. Die Position der digitalen Druckstationen 60 ist entsprechend zur Drehachse 22 zentriert, so dass die zu bedruckenden Werkstücke mit den Werkstückträgern 34 zentriert unter die digitalen Druckstationen 60 bewegt werden können. Hierdurch kann etwa ein individueller Auftrag, eine laufende Zahl oder ein Name entsprechend einer individuellen Steuervorgabe aufgedruckt werden. Abschließend wird das Werkstück zur Ausgabe A gedreht, in welcher das bedruckte Werkstück entnommen werden kann. Gegebenenfalls könnte noch eine oder mehrere Trocknungsstationen entlang des Umfangs der Maschine angeordnet sein, wobei sich entsprechend die Zahl der Druckstationen verringern würde.At an input E, the workpieces are clamped on the workpiece carriers 34. By stepwise rotation in a clockwise direction, the workpiece passes through the individual screen printing stations 42, in each of which an imprint can be made. After the tenth screen printing station 42, two digital printing stations 60 are arranged, which are mounted directly on the floor separately from the machine bed. The position of the digital printing stations 60 is centered corresponding to the axis of rotation 22, so that the workpieces to be printed with the workpiece carriers 34 centered under the digital printing stations 60 can be moved. In this way, for example, an individual order, a running number or a name can be printed according to an individual tax specification. Finally, the workpiece is rotated to the output A, in which the printed workpiece can be removed. Optionally, one or more drying stations could be arranged along the circumference of the machine, which would correspondingly reduce the number of printing stations.

Claims (9)

  1. Printing machine for printing workpieces, in particular textiles, comprising
    - a machine bed (12),
    - several screen printing stations (42) which are jointly arranged on a printing plate (40) that is supported on the machine bed (12),
    - a turntable (20), which has a plurality of workpiece carriers (34) and is supported on the machine bed (12) about an axis of rotation (22) and is driven in order to convey the workpieces to the screen printing stations (42) step-by-step, and
    - a lifting device for axial displacement of the printing plate (40) with the screen printing stations (42) relative to the turntable (20), whereby the printing plate (40) is advanced to the turntable (20) for printing and moved away from the turntable (20) for step-by-step conveyance,
    characterized in that
    - at least one digital printing station (60) with at least one controllable jet nozzle is arranged for complementary printing of the workpieces, and
    - in order to print a workpiece the at least one digital printing station (60) can be coupled in a force-fitting and/or form-fitting manner with the workpiece carrier (34) of the said workpiece.
  2. Printing machine according to claim 1,
    characterized in that
    the at least one digital printing station (60) is supported separately from the printing plate (40) with the screen printing stations (42).
  3. Printing machine according to claim 1 or 2,
    characterized in that
    the printing plate (40) is connected to the machine bed (12) above the turntable (20) and
    in that the at least one digital printing station (60) is connected to the machine bed (12) below the turntable (20) or is supported directly on the ground separately from the machine bed (12).
  4. Printing machine according to any one of claims 1 to 3,
    characterized in that
    the workpiece carrier (34) and/or the workpiece can be provided with a marking and
    in that the at least one digital printing station (60) has a sensor for detecting the marking and an adjustment device, by means of which the at least one jet nozzle can be adjusted.
  5. Printing machine according to any one of claims 1 to 4,
    characterized in that
    in order to set the printing performance the at least one jet nozzle is heightadjustable relative to the workpiece.
  6. Printing machine according to any one of claims 1 to 5,
    characterized in that
    the work cycle of the screen printing stations (42) and the at least one digital printing station (60) is equal, in particular ranging from 0.5 to 5 seconds, preferably ranging from 1 to 2 seconds.
  7. Method for printing workpieces, in particular textiles, wherein
    - the workpieces are stretched onto workpiece carriers (34) that are arranged on a turntable (20) which is supported in a rotating manner about a machine bed (12),
    - through step-by-step driving of the turntable (20) the workpieces are conveyed to work positions, at which the workpieces are each printed by a screen printing station (42) that is arranged on a joint printing plate (40), and
    - for printing, the printing plate (40) is advanced relative to the turntable (20) by means of a lifting device and
    - for step-by-step further conveyance the printing plate (40) is moved away relative to the turntable (20),
    characterized in that
    - the workpiece is additionally printed by at least one digital printing station (60), which has at least one controllable jet nozzle, and
    - in order to print a workpiece the at least one digital printing station (60) can be coupled in a force-fitting and/or form-fitting manner with the workpiece carrier (34) of the said workpiece.
  8. Method according to claim 7,
    characterized in that
    a control is provided for the at least one digital printing station (60), through which the workpieces are printed individually in different manner.
  9. Method according to claim 7 or 8,
    characterized in that
    a control is provided for several digital printing stations (60), which divides out a printing task among the several digital printing stations (60) according to a predetermined work cycle.
EP05020236A 2005-09-16 2005-09-16 Printing machine and process to print on objects, especially on textile Not-in-force EP1764217B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE502005006656T DE502005006656D1 (en) 2005-09-16 2005-09-16 Printing machine and method for printing on workpieces, in particular textiles
EP05020236A EP1764217B1 (en) 2005-09-16 2005-09-16 Printing machine and process to print on objects, especially on textile
AT05020236T ATE423003T1 (en) 2005-09-16 2005-09-16 PRINTING MACHINE AND METHOD FOR PRINTING WORKPIECES, IN PARTICULAR TEXTILES
PCT/EP2006/008536 WO2007033752A1 (en) 2005-09-16 2006-08-31 Printing press and method for printing workpieces, especially fabrics
HK07110286.5A HK1102572A1 (en) 2005-09-16 2007-09-24 Printing machine and process to print on objects, especially on textile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05020236A EP1764217B1 (en) 2005-09-16 2005-09-16 Printing machine and process to print on objects, especially on textile

Publications (2)

Publication Number Publication Date
EP1764217A1 EP1764217A1 (en) 2007-03-21
EP1764217B1 true EP1764217B1 (en) 2009-02-18

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AT (1) ATE423003T1 (en)
DE (1) DE502005006656D1 (en)
HK (1) HK1102572A1 (en)
WO (1) WO2007033752A1 (en)

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Publication number Priority date Publication date Assignee Title
EP2130680B1 (en) 2008-06-02 2012-09-05 Machines Highest Mechatronic GmbH Printing press and method for printing print goods
IT1394325B1 (en) * 2009-06-15 2012-06-06 Omso Officina Macchine Per Stampa Su Oggetti Societa Per Azioni ROTATING GIOSTRA FOR ROTARY-TYPE PRINTING MACHINE
CN103171319B (en) * 2013-04-11 2015-05-13 杭州宏华数码科技股份有限公司 Printing method of combining conventional printing with digital printing
CN104773001B (en) * 2015-04-02 2017-10-10 杭州昌帘盟纺织品有限公司 A kind of preparation technology for the pattern fabric that bronze printing and digital positioning stamp are combined
AT522546B1 (en) 2019-05-08 2022-06-15 Machines Highest Mechatronic Gmbh Printing machine and method for printing printed matter
CN114872429A (en) * 2022-04-19 2022-08-09 深圳圣鑫自动化设备有限公司 General type screen printing equipment

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EP1726444A1 (en) * 2005-05-27 2006-11-29 Colorprint di Macchi L. & C. S.n.c. Double technology silk-screen and digital color print process and carousel

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Publication number Priority date Publication date Assignee Title
NL9201679A (en) * 1992-09-29 1994-04-18 Stork Brabant Bv Combined screen-printing/inkjet printer
FR2784933B1 (en) * 1998-10-22 2001-01-05 Dubuit Mach PRINTING MACHINE COMPRISING AT LEAST ONE SERIGRAPHIC PRINTING STATION AND AT LEAST ONE DIGITAL INK-JET PRINTING STATION
US6408745B1 (en) * 2000-01-06 2002-06-25 Anatol Incorporated Variable height print table arrangement for a screen printing apparatus

Patent Citations (1)

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EP1726444A1 (en) * 2005-05-27 2006-11-29 Colorprint di Macchi L. & C. S.n.c. Double technology silk-screen and digital color print process and carousel

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ATE423003T1 (en) 2009-03-15
DE502005006656D1 (en) 2009-04-02
WO2007033752A1 (en) 2007-03-29
EP1764217A1 (en) 2007-03-21

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