EP3072690B1 - Sheet fed printer with accelerating station - Google Patents

Sheet fed printer with accelerating station Download PDF

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Publication number
EP3072690B1
EP3072690B1 EP16156621.1A EP16156621A EP3072690B1 EP 3072690 B1 EP3072690 B1 EP 3072690B1 EP 16156621 A EP16156621 A EP 16156621A EP 3072690 B1 EP3072690 B1 EP 3072690B1
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EP
European Patent Office
Prior art keywords
sheet
unit
sheets
varnishing
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
EP16156621.1A
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German (de)
French (fr)
Other versions
EP3072690A1 (en
Inventor
Rolf Kündgen
Bernd Sitzmann
Patrick Roth
Rainer Hofmann
Arno JÜNGER
Alexander Knabe
Thomas Schmidt
Michael ÖSTREICHER
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
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Publication date
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Publication of EP3072690A1 publication Critical patent/EP3072690A1/en
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Publication of EP3072690B1 publication Critical patent/EP3072690B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines
    • B41F21/08—Combinations of endless conveyors and grippers
    • 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
    • B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/02—Rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/46—Printing units for inserting latest news
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/08—Print finishing devices, e.g. for glossing prints
    • 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
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • 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
    • B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/0009—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets control of the transport of the copy material
    • B41J13/0036—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets control of the transport of the copy material in the output section of automatic paper handling systems
    • 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
    • B41J3/44—Typewriters or selective printing mechanisms having dual functions or combined with, or coupled to, apparatus performing other functions
    • 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
    • B41J3/60—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for printing on both faces of the printing material

Definitions

  • the invention relates to a sheet-fed press with acceleration station with the features of claim 1 and a method for operating such a sheet-fed press according to claim 5.
  • transport systems are circulating conveyor belts, for example, designed as suction belts, and rotating cylinders, so-called Jettingzylinder, or rotating tablets known.
  • sectional processing stations and section-independent processing stations are operated inline, ie in a machine with continuous material flow, then the processing speed of the sectioned processing stations predefines the processing speed of the section-independent processing stations. As a result, the performance of the machine can be low.
  • the prior art devices are known for the processing of cartons, but not for coating, which serve to position a carton to a processing tool. So shows eg the EP 2 386 509 A2 a device for feeding and processing on a processing machine with positioning rollers.
  • the EP 2 058 115 B1 describes how folding cartons can be positioned relative to a rotary embossing tool.
  • document EP-A-181 0826 discloses an apparatus according to the preamble of claim 1.
  • the sheet-fed printing press is used for printing sheets in particular of paper, cardboard and plastic and has a sheet feeder, a subsequent digital printing station, a subsequent coating station and a subsequent sheet delivery.
  • the painting station has a coating unit with at least one paint cylinder, which is designed in particular as a Flexolackierwerk. With this coating unit, the sheet already printed in the digital printing station can be painted become.
  • an acceleration station is arranged between the digital printing station and the coating station for accelerating sheets from a first lower transport speed in the digital printing station to a second, higher transport speed in the coating station.
  • the distance between the sheets in the area of the digital printing station does not have to correspond to the spacing of the sheets in the area of the coating station, so that a higher productivity of the sheet-fed printing press can be achieved.
  • the acceleration station has a pair of rollers, a respective sheet being transported between the two rollers, thereby being clamped and accelerated.
  • a section-independent transport area e.g. using a conveyor belt
  • a sectioned transport area e.g. using a cylinder with grippers
  • a sheet can be transported in any position.
  • a sheet can only be transported in certain, discrete sections and there are certain, discrete layers of the sheet during its transport.
  • the latter has a machine control for controlling at least the digital printing station, the acceleration station and the coating station, the operating speed of the coating station being determined as a function of the transport speed of the sheets and the distance and the length of the sheets.
  • the digital printing station is designed as a duplex digital printing station for double-sided printing of a respective sheet.
  • the invention also relates to a method for operating a sheet-fed printing machine as described above, whereby sheets are accelerated by the acceleration station so that existing gaps between two sheets are reduced, ie gaps in the sheet stream are reduced or completely closed.
  • gaps between two sheets can arise especially when the sheetfed press is used in duplex mode and only every second sheet is continued to Lackierstation, every other sheet undergoes a return after a sheet transfer and printed a second time, now from the back, by the digital printing station is, especially when editing long bow.
  • the accelerator station accelerates arcs so that existing gaps between two arcs are increased, ie gaps in the arc current are widened. Such too small gaps between two sheets can arise especially when short sheets are processed.
  • the coating unit which is located in the sectioned transport area, can be operated in register and efficiently.
  • the invention also relates to an alternative method of operating a sheet-fed printing machine as described above, wherein sheets are accelerated by the accelerating station so that two short sheets are processed in the painting station during one revolution of the paint cylinder, d. H. can be painted. This makes it possible to operate the painting station at a high speed.
  • FIG. 1 shows a sheet-fed printing machine 100 according to the invention, in which sheet 1000 can be printed in a printing station 2 and painted by a painting station 4.
  • a respective sheet 1000 is transported by a feeder 1 in the transport direction T through the printing machine 100, thereby processed and laid out in a display 6.
  • a respective sheet 1000 passes through a section-independent transport area S1 and a section-related transport area S2.
  • the section-independent transport area S1 is a printing station 2, which has a plurality of inkjet heads 10, which are arranged at a small distance to the transport plane of the sheet 1000th
  • the sheets 1000 are transported at a first transport speed v1, for example by a conveyor belt or a sucking conveyor belt. Due to the limited operating speed of the inkjet heads 10, it is advantageous if the sheets 1000 are moved through the inkjet heads 10 at a rather low speed and at a small distance from one another. Subsequently, the sheets 1000 are transported in a section-related transport area S2 on.
  • an acceleration station 3 located between printing station 2 and painting station 4 is an acceleration station 3, which has a pair of acceleration rollers 16 in this section-related transport area S2 having.
  • the acceleration rollers 16 By the acceleration rollers 16, the sheets 1000 are accelerated to a second transport speed v2 and pass the Coating unit 14.
  • a drying station 5 may be provided with a dryer 15.
  • FIG. 2 an alternative embodiment of the above-described sheet-fed printing machine 100 is shown.
  • This also has a curved switch 11, a turning pocket 12 and a sheet return 13, so that in the printing station 2, the sheet back can be printed.
  • the sheet-fed printing machine 100 is used in so-called duplexing, the sheets 1000 are not transferred directly to the subsequent acceleration station 3 after printing, but discharged by means of a curved switch 11 in the sheet return 13, where the sheet turned in a turning pocket 12 or a different type of turning device and be transported back to the entrance of the printing station 2.
  • the sheets 1000 now pass through the printing station 2 for a second time, the inkjet heads 10 now printing the sheet back side.
  • a completely unprinted sheet 1000 is fed alternately from the feeder 1 and an already printed on one side sheet 1000 from the sheet return 13 of the printing station 2. This also means that only every second sheet 1000 is transferred from the printing station 2 to the acceleration station 3. Using the acceleration rollers 16 of the acceleration station 3, these sheets of the coating station 4 can register and at the desired speed, d. h .bestimmt to the processing speed of the coating station 4, are supplied.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Dot-Matrix Printers And Others (AREA)
  • Handling Of Cut Paper (AREA)
  • Ink Jet (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)

Description

Die Erfindung betrifft eine Bogendruckmaschine mit Beschleunigungsstation mit den Merkmalen von Anspruch 1 und ein Verfahren zum Betreiben einer solchen Bogendruckmaschine nach Anspruch 5.The invention relates to a sheet-fed press with acceleration station with the features of claim 1 and a method for operating such a sheet-fed press according to claim 5.

Stand der TechnikState of the art

Zum Bedrucken von Bogen aus Papier, Karton und Pappe in kleinen Auflagen oder mit individuellen Druckmotiven ist der Einsatz von Digitaldruckmaschinen bekannt. Beim Einsatz von Inkjetköpfen zum Bedrucken der Bogen wird ein jeweiliger Bogen von einem Transportsystem in einem minimalen Abstand unter den Inkjetköpfen hindurch bewegt.For printing sheets of paper, cardboard and cardboard in short runs or with individual print motifs, the use of digital printing machines is known. When using inkjet heads for printing on the sheets, a respective sheet is moved by a transport system at a minimum distance below the inkjet heads.

Als Transportsysteme sind umlaufende Transportbänder, beispielsweise ausgeführt als Saugbänder, und rotierende Zylinder, sogenannte Jettingzylinder, oder umlaufende Tablets, bekannt.As transport systems are circulating conveyor belts, for example, designed as suction belts, and rotating cylinders, so-called Jettingzylinder, or rotating tablets known.

Bei Maschinenkonzepten unter Verwendung von Transportbändern sind oberhalb eines Transportbandes mehrere Inkjetdruckköpfe angeordnet, welche in geringem Abstand zu den Druckköpfen vorbeibewegte Bogen bedrucken. Auf dem Transportband können mehrere Bogen gleichzeitig angesaugt und transportiert werden. Um eine hohe Druckqualität sicherzustellen und Beschädigungen der Druckköpfe zu vermeiden ist es wichtig, dass ein jeweiliger Bogen gut auf dem Band aufliegt. Bei einem solchen Transportband handelt es sich um ein sog. abschnittsunabhängiges Transportsystem.In machine concepts using conveyor belts, a plurality of inkjet printheads are arranged above a conveyor belt, which print printed sheets at a small distance from the printheads. On the conveyor belt several sheets can be sucked in and transported simultaneously. To ensure high print quality and to avoid damage to the printheads, it is important that each sheet fits well on the tape. Such a conveyor belt is a so-called section-independent transport system.

Einer Leistungssteigerung der Digitaldruckmaschine durch Erhöhung der Transportgeschwindigkeit werden durch die Druckgeschwindigkeit der Inkjetköpfe Grenzen gesetzt. Auch lässt die Druckqualität bei zunehmender Geschwindigkeit der zu bedruckenden Bogen nach.An increase in performance of the digital printing press by increasing the transport speed are limited by the printing speed of inkjet heads. Also, the print quality decreases as the speed of the sheets to be printed increases.

Auch bekannt ist es, bedruckte Bogen nach dem Druckprozess zu lackieren. Dabei kommen Lackierwerke zum Einsatz, welche als Flexolackierwerke mit Lackierzylinder ausgeführt sind. Im Gegensatz zu den variablen Inkjetdruckköpfen arbeitet das Lackierwerk mit festen Formen. Ein jeweiliger bedruckter Bogen muss dem Lackierwerk daher registergenau zugeführt werden, sodass der Lack registergenau, d.h. an der richtigen Stelle aufgebracht wird. Ein solches mit Zylindern arbeitendes Bearbeitungswerk weist einen sog. abschnittsbehafteten Transport auf.It is also known to paint printed sheets after the printing process. This painting systems are used, which are designed as Flexolackierwerke with painting cylinder. Unlike the variable inkjet print heads, this works Paint shop with fixed shapes. A respective printed sheet must therefore be supplied to the coating unit in register, so that the paint register accurate, that is applied in the right place. Such a working with cylinders processing plant has a so-called. Sectional transport.

Werden abschnittsbehaftete Bearbeitungsstationen und abschnittsunabhängige Bearbeitungsstationen inline, d.h. in einer Maschine mit fortlaufendem Materialfluss, betrieben, so gibt die Bearbeitungsgeschwindigkeit der abschnittsbehaftete Bearbeitungsstationen die Bearbeitungsgeschwindigkeit der abschnittsunabhängigen Bearbeitungsstationen vor. Dadurch kann die Leistung der Maschine gering ausfallen. Aus dem Stand der Technik sind für die Bearbeitung von Faltschachteln, nicht jedoch für Lackierwerke, Einrichtungen bekannt, welche dem Positionieren einer Faltschachtel zu einem Bearbeitungswerkzeug dienen. So zeigt z.B. die EP 2 386 509 A2 eine Vorrichtung zum Zuführen und Bearbeiten an einer Bearbeitungsmaschine mit Positionierwalzen. Die EP 2 058 115 B1 beschreibt, wie Faltschachteln relativ zu einem rotativen Prägewerkzeug positioniert werden können. Dokument EP-A-181 0826 offenbart eine Vorrichtung gemäß Oberbegriff von Anspruch 1. Aufgabenstellung Aufgabe der vorliegenden Erfindung ist es eine Bogendruckmaschine mit einer Digitaldruckstation und einer Lackierstation zu schaffen, welche die Nachteile des Standes der Technik reduziert und einen wirtschaftlichen Betrieb der Maschine erlaubt. Weitere Aufgabe ist es, ein Verfahren zum Betreiben einer solchen Bogendruckmaschine zu beschreiben.If sectional processing stations and section-independent processing stations are operated inline, ie in a machine with continuous material flow, then the processing speed of the sectioned processing stations predefines the processing speed of the section-independent processing stations. As a result, the performance of the machine can be low. From the prior art devices are known for the processing of cartons, but not for coating, which serve to position a carton to a processing tool. So shows eg the EP 2 386 509 A2 a device for feeding and processing on a processing machine with positioning rollers. The EP 2 058 115 B1 describes how folding cartons can be positioned relative to a rotary embossing tool. document EP-A-181 0826 discloses an apparatus according to the preamble of claim 1. [0010] It is an object of the present invention to provide a sheet-fed press with a digital printing station and a coating station which reduces the disadvantages of the prior art and allows economical operation of the machine. Another object is to describe a method for operating such a sheet-fed printing press.

Die erfindungsgemäße Bogendruckmaschine dient dem Bedrucken von Bogen insbesondere aus Papier, Pappe und Kunststoff und besitzt einen Bogenanleger, eine nachfolgende Digitaldruckstation, eine nachfolgende Lackierstation und einen nachfolgenden Bogenausleger. Die Lackierstation weist ein Lackierwerk mit zumindest einem Lackzylinder auf, welches insbesondere als Flexolackierwerk ausgeführt ist. Mit diesem Lackierwerk kann der bereits in der Digitaldruckstation bedruckte Bogen lackiert werden. Erfindungsgemäß ist zwischen Digitaldruckstation und Lackierstation eine Beschleunigungsstation angeordnet zum Beschleunigen von Bogen von einer ersten geringeren Transportgeschwindigkeit in der Digitaldruckstation auf eine zweite höhere Transportgeschwindigkeit in der Lackierstation. In vorteilhafter Weise muss damit der Abstand der Bogen im Bereich der Digitaldruckstation nicht dem Abstand der Bogen im Bereich der Lackierstation entsprechen, so dass eine höhere Produktivität der Bogendruckmaschine erzielt werden kann.The sheet-fed printing press according to the invention is used for printing sheets in particular of paper, cardboard and plastic and has a sheet feeder, a subsequent digital printing station, a subsequent coating station and a subsequent sheet delivery. The painting station has a coating unit with at least one paint cylinder, which is designed in particular as a Flexolackierwerk. With this coating unit, the sheet already printed in the digital printing station can be painted become. According to the invention, an acceleration station is arranged between the digital printing station and the coating station for accelerating sheets from a first lower transport speed in the digital printing station to a second, higher transport speed in the coating station. Advantageously, therefore, the distance between the sheets in the area of the digital printing station does not have to correspond to the spacing of the sheets in the area of the coating station, so that a higher productivity of the sheet-fed printing press can be achieved.

Die Beschleunigungsstation weist erfindungsgemäß ein Walzenpaar auf, wobei ein jeweiliger Bogen zwischen den beiden Walzen hindurch transportiert, dabei geklemmt und beschleunigt wird.According to the invention, the acceleration station has a pair of rollers, a respective sheet being transported between the two rollers, thereby being clamped and accelerated.

In einer besonders vorteilhaften und daher bevorzugten Weiterbildung der erfindungsgemäßen Bogendruckmaschine liegt im Bereich der Digitaldruckstation ein abschnittsunabhängiger Transportbereich, z.B. unter Verwendung eines Transportbandes, und im Bereich der Lackierstation ein abschnittsbehafteter Transportbereich, z.B. unter Verwendung eines Zylinders mit Greifern, vor. Im abschnittsunabhängigen Transportbereich kann ein Bogen in jeder Lage transportiert werden. Im abschnittsbehafteten Transportbereich kann ein Bogen nur in bestimmten, diskreten Abschnitten transportiert werden und es gibt bestimmte, diskrete Lagen des Bogens während seinem Transport.In a particularly advantageous and therefore preferred development of the sheet-fed printing machine according to the invention, a section-independent transport area, e.g. using a conveyor belt, and in the area of the painting station a sectioned transport area, e.g. using a cylinder with grippers, before. In the section-independent transport area, a sheet can be transported in any position. In the sectioned transport area, a sheet can only be transported in certain, discrete sections and there are certain, discrete layers of the sheet during its transport.

In Weiterbildung der erfindungsgemäßen Bogendruckmaschine besitzt diese eine Maschinensteuerung zur Ansteuerung zumindest der Digitaldruckstation, der Beschleunigungsstation und der Lackierstation, wobei die Arbeitsgeschwindigkeit der Lackierstation in Abhängigkeit von der Transportgeschwindigkeit der Bogen und dem Abstand und der Länge der Bogen bestimmt wird.In a further development of the sheet-fed printing machine according to the invention, the latter has a machine control for controlling at least the digital printing station, the acceleration station and the coating station, the operating speed of the coating station being determined as a function of the transport speed of the sheets and the distance and the length of the sheets.

In einer Ausführungsvariante der erfindungsgemäßen Bogendruckmaschine ist die Digitaldruckstation als Duplex-Digitaldruckstation ausgebildet zum beidseitigen Bedrucken eines jeweiligen Bogens.In an embodiment variant of the sheet-fed printing machine according to the invention, the digital printing station is designed as a duplex digital printing station for double-sided printing of a respective sheet.

Die Erfindung betrifft auch ein Verfahren zum Betreiben einer wie obenstehend beschriebenen Bogendruckmaschine, wobei durch die Beschleunigungsstation Bogen so beschleunigt werden, dass vorhandene Lücken zwischen zwei Bogen verkleinert werden, also Lücken im Bogenstrom reduziert oder ganz geschlossen werden. Solche Lücken zwischen zwei Bogen können besonders dann entstehen, wenn die Bogendruckmaschine im Duplexbetrieb verwendet wird und nur jeder zweite Bogen zur Lackierstation weitergeführt wird, jeder andere Bogen nach einer Bogenwendung einen Rücktransport erfährt und ein zweites Mal, nun von der Rückseite, durch die Digitaldruckstation bedruckt wird, ganz besonders bei Bearbeitung langer Bogen. Alternativ werden durch die Beschleunigungsstation Bogen so beschleunigt, dass vorhandene Lücken zwischen zwei Bogen vergrößert werden, also Lücken im Bogenstrom ausgeweitet werden. Solche zu kleine Lücken zwischen zwei Bogen können besonders dann entstehen, wenn kurze Bogen bearbeitet werden. Durch die Anpassung der Bogenlücke kann das Lackierwerk, welches sich im abschnittsbehafteten Transportbereich befindet, registergenau und effizient betrieben werden.The invention also relates to a method for operating a sheet-fed printing machine as described above, whereby sheets are accelerated by the acceleration station so that existing gaps between two sheets are reduced, ie gaps in the sheet stream are reduced or completely closed. Such gaps between two sheets can arise especially when the sheetfed press is used in duplex mode and only every second sheet is continued to Lackierstation, every other sheet undergoes a return after a sheet transfer and printed a second time, now from the back, by the digital printing station is, especially when editing long bow. Alternatively, the accelerator station accelerates arcs so that existing gaps between two arcs are increased, ie gaps in the arc current are widened. Such too small gaps between two sheets can arise especially when short sheets are processed. By adjusting the arc gap, the coating unit, which is located in the sectioned transport area, can be operated in register and efficiently.

Die Erfindung betrifft auch ein alternatives Verfahren zum Betreiben einer wie obenstehend beschriebenen Bogendruckmaschine, wobei durch die Beschleunigungsstation Bogen so beschleunigt werden, dass zwei kurze Bogen in der Lackierstation bei einer Umdrehung des Lackzylinders bearbeitet, d. h. lackiert werden können. Dadurch wird ermöglicht, die Lackierstation mit einer hohen Geschwindigkeit zu betreiben.The invention also relates to an alternative method of operating a sheet-fed printing machine as described above, wherein sheets are accelerated by the accelerating station so that two short sheets are processed in the painting station during one revolution of the paint cylinder, d. H. can be painted. This makes it possible to operate the painting station at a high speed.

Die beschriebene Erfindung und die beschriebenen vorteilhaften Weiterbildungen der Erfindung stellen auch in Kombination miteinander - soweit dies technisch sinnvoll ist - vorteilhafte Weiterbildungen der Erfindung dar.The invention described and the described advantageous developments of the invention are also in combination with each other - as far as is technically feasible - advantageous developments of the invention.

Hinsichtlich weiterer Vorteile und in konstruktiver und funktioneller Hinsicht vorteilhafter Ausgestaltungen der Erfindung wird auf die Unteransprüche sowie die Beschreibung von Ausführungsbeispielen unter Bezugnahme auf die beiliegenden Figuren verwiesen.With regard to further advantages and constructive and functional advantageous embodiments of the invention, reference is made to the dependent claims and the description of exemplary embodiments with reference to the accompanying figures.

Ausführungsbeispielembodiment

Die Erfindung soll an Hand beigefügter Figuren noch näher erläutert werden. Einander entsprechende Elemente und Bauteile sind in den Figuren mit gleichen Bezugszeichen versehen. Zugunsten einer besseren Übersichtlichkeit der Figuren wurde auf eine maßstabsgetreue Darstellung verzichtet.The invention will be explained in more detail with reference to attached figures. Corresponding elements and components are provided in the figures with the same reference numerals. In favor of a better clarity of the figures was waived a true to scale representation.

Es zeigen in schematischer Darstellung

Fig. 1
eine erfindungsgemäße Bogendruckmaschine
Fig. 2
eine erfindungsgemäße Bogendruckmaschine mit Duplex-Funktion
It show in a schematic representation
Fig. 1
a sheet-fed printing machine according to the invention
Fig. 2
a sheet-fed press according to the invention with duplex function

Figur 1 zeigt eine erfindungsgemäße Bogendruckmaschine 100, in welcher Bogen 1000 in einer Druckstation 2 bedruckt und durch eine Lackierstation 4 lackiert werden können. Ein jeweiliger Bogen 1000 wird von einem Anleger 1 kommend in Transportrichtung T durch die Druckmaschine 100 transportiert, dabei bearbeitet und in einer Auslage 6 ausgelegt. FIG. 1 shows a sheet-fed printing machine 100 according to the invention, in which sheet 1000 can be printed in a printing station 2 and painted by a painting station 4. A respective sheet 1000 is transported by a feeder 1 in the transport direction T through the printing machine 100, thereby processed and laid out in a display 6.

Dabei durchläuft ein jeweiliger Bogen 1000 einen abschnittsunabhängigen Transportbereich S1 sowie einen abschnittsbehafteten Transportbereich S2. In dem abschnittsunabhängigen Transportbereich S1 befindet sich eine Druckstation 2, welche mehrere Inkjetköpfe 10 aufweist, welche in geringem Abstand zur Transportebene der Bogen 1000 angeordnet sind. Im abschnittsunabhängigen Transportbereich S1 werden die Bogen 1000 mit einer ersten Transportgeschwindigkeit v1 transportiert, beispielsweise von einem Transportband bzw. einem saugenden Transportband. Aufgrund der limitierten Arbeitsgeschwindigkeit der Inkjetköpfe 10 ist es von Vorteil, wenn die Bogen 1000 mit eher geringer Geschwindigkeit und mit geringem Abstand zueinander unter den Inkjetköpfen 10 hindurch bewegt werden. Anschließend werden die Bogen 1000 in einem abschnittsbehafteten Transportbereich S2 weiter transportiert. In diesem abschnittsbehafteten Transportbereich S2 befindet sich eine Lackierstation 4 mit einem Lackierwerk mit Lackzylinder 14. Um sicherzustellen, dass die Bogen 1000 registergenau in das Lackierwerk 14 eingeführt werden, befindet sich zwischen Druckstation 2 und Lackierstation 4 eine Beschleunigungsstation 3, welche ein Paar von Beschleunigungswalzen 16 aufweist. Durch die Beschleunigungswalzen 16 werden die Bogen 1000 auf eine zweite Transportgeschwindigkeit v2 beschleunigt und passieren das Lackierwerk 14. Im Anschluss an das Lackierwerk 14 kann eine Trockenstation 5 mit einem Trockner 15 vorgesehen sein.In this case, a respective sheet 1000 passes through a section-independent transport area S1 and a section-related transport area S2. In the section-independent transport area S1 is a printing station 2, which has a plurality of inkjet heads 10, which are arranged at a small distance to the transport plane of the sheet 1000th In the section-independent transport area S1, the sheets 1000 are transported at a first transport speed v1, for example by a conveyor belt or a sucking conveyor belt. Due to the limited operating speed of the inkjet heads 10, it is advantageous if the sheets 1000 are moved through the inkjet heads 10 at a rather low speed and at a small distance from one another. Subsequently, the sheets 1000 are transported in a section-related transport area S2 on. In order to ensure that the sheets 1000 are inserted register-accurate in the coating unit 14, located between printing station 2 and painting station 4 is an acceleration station 3, which has a pair of acceleration rollers 16 in this section-related transport area S2 having. By the acceleration rollers 16, the sheets 1000 are accelerated to a second transport speed v2 and pass the Coating unit 14. Following the coating unit 14, a drying station 5 may be provided with a dryer 15.

In Figur 2 ist eine alternative Ausführungsform der vorstehend beschriebenen Bogendruckmaschine 100 dargestellt. Diese besitzt zusätzlich eine Bogenweiche 11, eine Wendetasche 12 sowie eine Bogenrückführung 13, so dass in der Druckstation 2 auch die Bogenrückseite bedruckt werden kann. Wenn die Bogendruckmaschine 100 im sogenannten Duplexbetrieb verwendet wird, werden die Bogen 1000 nach dem Bedrucken nicht direkt an die nachfolgende Beschleunigungsstation 3 übergeben, sondern mittels einer Bogenweiche 11 in die Bogenrückführung 13 ausgeschleust, wo die Bogen in einer Wendetasche 12 oder einer andersartigen Wendeeinrichtung gewendet und wieder an den Eingang der Druckstation 2 transportiert werden. Die Bogen 1000 durchlaufen nun die Druckstation 2 ein zweites Mal, wobei von den Inkjetköpfen 10 nun die Bogenrückseite bedruckt wird. Um ein kontinuierliches Arbeiten der Bogendruckmaschine 100 im Duplexbetrieb zu ermöglichen, wird abwechselnd ein gänzlich unbedruckter Bogen 1000 von dem Anleger 1 und ein bereits einseitig bedruckter Bogen 1000 aus der Bogenrückführung 13 der Druckstation 2 zugeführt. Damit ergibt sich auch, dass nur jeder zweite Bogen 1000 von der Druckstation 2 an die Beschleunigungsstation 3 übergeben wird. Unter Verwendung der Beschleunigungswalzen 16 der Beschleunigungsstation 3 können diese Bogen der Lackierstation 4 registergenau und in der gewünschten Geschwindigkeit, d. h .abgestimmt auf die Bearbeitungsgeschwindigkeit der Lackierstation 4, zugeführt werden.In FIG. 2 an alternative embodiment of the above-described sheet-fed printing machine 100 is shown. This also has a curved switch 11, a turning pocket 12 and a sheet return 13, so that in the printing station 2, the sheet back can be printed. When the sheet-fed printing machine 100 is used in so-called duplexing, the sheets 1000 are not transferred directly to the subsequent acceleration station 3 after printing, but discharged by means of a curved switch 11 in the sheet return 13, where the sheet turned in a turning pocket 12 or a different type of turning device and be transported back to the entrance of the printing station 2. The sheets 1000 now pass through the printing station 2 for a second time, the inkjet heads 10 now printing the sheet back side. In order to enable continuous operation of the sheet-fed printing machine 100 in duplex mode, a completely unprinted sheet 1000 is fed alternately from the feeder 1 and an already printed on one side sheet 1000 from the sheet return 13 of the printing station 2. This also means that only every second sheet 1000 is transferred from the printing station 2 to the acceleration station 3. Using the acceleration rollers 16 of the acceleration station 3, these sheets of the coating station 4 can register and at the desired speed, d. h .bestimmt to the processing speed of the coating station 4, are supplied.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Anlegerinvestor
22
Druckstationprinting station
33
Beschleunigungsstationaccelerating station
44
Lackierstationpainting station
55
Trockenstationdrying station
66
Auslagedisplay
1010
Inkjetköpfeinkjet heads
1111
BogenweicheBogenweiche
1212
WendetascheWendetasche
1313
BogenrückführungFeedback sheet
1414
Lackierwerk mit LackzylinderPaint shop with paint cylinder
1515
Trocknerdryer
1616
Beschleunigungswalzeaccelerating roll
100100
Druckmaschinepress
10001000
Bogenbow
TT
Transportrichtungtransport direction
SS
1 abschnittsunabhängier Transportbereich1 section-independent transport area
S2S2
abschnittsbehafteter Transportbereichsectioned transport area
v1v1
erste Transportgeschwindigkeitfirst transport speed
v2v2
zweite Transportgeschwindigkeitsecond transport speed

Claims (6)

  1. Sheet-fed printing machine (100) including a sheet feeder (1), a digital printing unit (2), a downstream varnishing unit (4), and a sheet delivery (6),
    wherein the varnishing unit (4) includes a varnishing device (14) with at least one varnishing cylinder, further including an acceleration unit (3) disposed between the digital printing unit (2) and the varnishing unit (4) for accelerating sheets (1000) from a first transport speed (v1) in the digital printing unit (2) to a second transport speed (v2) in the varnishing unit (4),
    wherein a transport region (S1) in the region of the digital printing unit (2) is phase-independent and a transport region (S2) in the region of the varnishing unit (4) is phase-dependent,
    characterized in
    that the acceleration unit (3) includes a roller pair (16),
    wherein a respective sheet (1000) is transported between the two rollers of the roller pair (16) and clamped and accelerated in the process.
  2. Sheet-fed printing machine according to claim 1,
    characterized in
    that the sheet-fed printing machine (100) includes a machine control unit for actuating at least the digital printing unit (2), the acceleration unit (3), and the varnishing unit (4).
  3. Sheet-fed printing machine according to any one of the preceding claims,
    characterized in
    that the digital printing unit (2) is embodied as a digital duplex printing unit.
  4. Method for operating a sheet-fed printing unit according to any one of the preceding claims,
    wherein the acceleration unit (3) accelerates the sheets (1000) in a way to increase or decrease existing gaps between two sheets (1000).
  5. Method for operating a sheet-fed printing machine according to any one of claims 1 to 3, wherein the acceleration unit (3) accelerates sheets (1000) in a way to be able to varnish two short sheets (1000) in the varnishing unit (4) upon one revolution of the varnishing cylinder.
  6. Method for operating a sheet-fed printing machine according to claim 2,
    characterized in
    that the operating speed of the varnishing unit (4) is determined as a function of the transport speed of the sheets (1000) and as a function of the spacing and length of the sheets (1000).
EP16156621.1A 2015-03-25 2016-02-22 Sheet fed printer with accelerating station Not-in-force EP3072690B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015205453.5A DE102015205453A1 (en) 2015-03-25 2015-03-25 Sheet-fed press with acceleration station

Publications (2)

Publication Number Publication Date
EP3072690A1 EP3072690A1 (en) 2016-09-28
EP3072690B1 true EP3072690B1 (en) 2018-04-18

Family

ID=55442660

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16156621.1A Not-in-force EP3072690B1 (en) 2015-03-25 2016-02-22 Sheet fed printer with accelerating station

Country Status (3)

Country Link
EP (1) EP3072690B1 (en)
CN (1) CN106004100B (en)
DE (1) DE102015205453A1 (en)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19611561A1 (en) * 1996-03-23 1997-09-25 Koenig & Bauer Albert Ag Method and device for transporting sheets
DE102006002302A1 (en) * 2006-01-18 2007-07-19 Man Roland Druckmaschinen Ag Sheet fed printing unit for creation of identical products, comprises device for printing varying information integrated in feeding area
JP5014838B2 (en) * 2007-03-02 2012-08-29 株式会社リコー Image forming apparatus
DE102007053806A1 (en) 2007-11-12 2009-05-14 Heidelberger Druckmaschinen Ag Rotary embosser
JP2009149037A (en) * 2007-12-21 2009-07-09 Tohoku Ricoh Co Ltd Coating device in inkjet printing equipment
DE102009025611B4 (en) * 2008-07-11 2022-08-25 Heidelberger Druckmaschinen Ag Method and device for feeding sheets to a processing machine
CH703129A2 (en) 2010-05-12 2011-11-15 Bograma Ag Device with sequencing logic for feeding and editing a surface materials.
EP2712737A1 (en) * 2012-09-27 2014-04-02 Jacob Kaikkis Printing apparatus and method for top coat
JP6098253B2 (en) * 2013-03-14 2017-03-22 株式会社リコー Image forming apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
CN106004100B (en) 2019-05-10
DE102015205453A1 (en) 2016-09-29
CN106004100A (en) 2016-10-12
EP3072690A1 (en) 2016-09-28

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