EP1426182B1 - Excimer radiator for the drier of a printing press - Google Patents

Excimer radiator for the drier of a printing press Download PDF

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Publication number
EP1426182B1
EP1426182B1 EP03026705A EP03026705A EP1426182B1 EP 1426182 B1 EP1426182 B1 EP 1426182B1 EP 03026705 A EP03026705 A EP 03026705A EP 03026705 A EP03026705 A EP 03026705A EP 1426182 B1 EP1426182 B1 EP 1426182B1
Authority
EP
European Patent Office
Prior art keywords
reflector
radiator
printing press
housing
sections
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.)
Expired - Lifetime
Application number
EP03026705A
Other languages
German (de)
French (fr)
Other versions
EP1426182A1 (en
Inventor
Andreas Dipl.-Ing. Ihme
Axel Sobottka
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.)
Manroland AG
Original Assignee
MAN Roland Druckmaschinen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP1426182A1 publication Critical patent/EP1426182A1/en
Application granted granted Critical
Publication of EP1426182B1 publication Critical patent/EP1426182B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
    • 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
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/044—Drying sheets, e.g. between two printing stations
    • 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
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/0486—Particular types of dryers

Definitions

  • the invention relates to an excimer radiator for the dryer of a printing press according to the preamble of claim 1.
  • the printed sheets are conveyed through cylinders and drums through the individual printing units and, after the last printing unit, through one or more painting and other finishing devices.
  • Chain systems transport the sheets from one last drum to the delivery pile.
  • drying devices are provided at a plurality of locations.
  • UV emitters and especially excimer emitters are used as dryers.
  • the UV radiation directed at the printed side of the sheets must be designed with regard to intensity and distribution in such a way that complete curing of the colors is achieved even at maximum printing speed. Not complete curing of the color will lead to damage and thus waste when touching the sheet with sheet guiding devices or in the boom.
  • Excimer radiators for sheetfed offset printing presses are for example from EP 378 826 A2 of the DE 198 57 984 A1 as well as the EP 891 525 B1 known.
  • the radiation generated in tubular excimer emitters is highly divergent. This is because the discharge space has a circular cross section formed by the inner and outer tubes of the dielectric accommodating space. Area radiators with a rectangular reflector provide only at close range (on some Millimeters) technically usable irradiation powers. In addition, the UV intensity decreases sharply with increasing distance.
  • the distance between spotlight and substrate level is in the range of a few centimeters for technical reasons.
  • the installation space is often limited. In order to achieve technically usable intensities, the radiation must therefore be directed.
  • the UV emitter according to the EP 891525 B1 has a extending over the format width of the machine tube as a radiation generator, which cooperates with a reflector arranged in a housing.
  • the radiation generated by the tube is directed directed onto the substrate.
  • it is important in UV color printing to achieve a high radiation power in the area of the printed sheet irradiated by the excimer radiator.
  • multiple individual emitters are often connected in series, which, however, requires appropriate installation space in the printing press.
  • Object of the present invention is therefore to extend an excimer radiator according to the preamble of claim 1 such that a high radiation power in a compact design is possible.
  • the parallel arrangement of two radiator tubes in a housing with associated and preferably a common reflector forming reflector parts results in optimal irradiation of the printing substrate in the respective predetermined distance.
  • the mirror geometry is calculated according to the distance.
  • the corresponding parameters here are the mirror shape, the position / orientation of the radiation tube to the mirror and the angle of inclination of the mirror elements to each other.
  • Two radiator tubes 2 and 3 run parallel within a downwardly radiation-transmissive (open) housing 1.
  • the Strahlerrören 2 and 3 are fixed by not shown in the figure shots at both ends in respective brackets of the housing 1.
  • Each emitter tube 2, 3 is associated with a reflector section 4, 5, which form a common reflector system.
  • the reflector sections 4, 5 are calculated and designed with respect to the arrangement and spacing of the radiator tubes 2, 3, so that in a desired Distance between the radiator tubes 2, 3 results in the required radiation intensity.

Abstract

The drying stage of a printing machine and in particular an offset printing process, uses a pair of ultra violet emitting tubes (2,3) mounted in parallel. They are positioned next to reflector surfaces (4) in a housing to generate the required intensity.

Description

Die Erfindung betrifft einen Excimer-Strahler für den Trockner einer Druckmaschine gemäß dem Oberbegriff von Anspruch 1.The invention relates to an excimer radiator for the dryer of a printing press according to the preamble of claim 1.

[Stand der Technik][State of the art]

In Bogenoffsetdruckmaschinen werden die bedruckten Bogen über Zylinder und Trommeln durch die einzelnen Druckwerke und nach dem letzten Druckwerk durch ein oder mehrere Lackier-und sonstige Veredelungseinrichtungen gefördert. Über Kettensysteme erfolgt der Transport der Bogen von einer letzten Trommel zum Auslegerstapel. Um ein Abschmieren der frisch bedruckten Bogen beim Transport zwischen den Druckwerken, zwischen dem letzten Druckwerk und dem Ausleger bzw. den Lackiereinrichtungen zu vermeiden, sind an einer Vielzahl von Stellen Trocknereinrichtungen vorgesehen.In sheetfed offset presses, the printed sheets are conveyed through cylinders and drums through the individual printing units and, after the last printing unit, through one or more painting and other finishing devices. Chain systems transport the sheets from one last drum to the delivery pile. In order to avoid smearing of the freshly printed sheets during transport between the printing units, between the last printing unit and the boom or the painting, drying devices are provided at a plurality of locations.

Beim Druck von UV-Farben werden UV-Strahler und insbesondere Excimer-Strahler als Trockner verwendet. Die auf die bedruckte Seite der Bogen gerichtete UV-Strahlung ist hinsichtlich Intensität und Verteilung so zu gestalten, dass auch bei maximaler Druckgeschwindigkeit eine vollständige Aushärtung der Farben erzielt wird. Ein nicht vollständiges Aushärten der Farbe wird bei Berührung des Bogens mit Bogenleiteinrichtungen bzw. im Ausleger zu Beschädigungen und somit Makulatur führen. Excimer-Strahler für Bogenoffsetdruckmaschinen sind beispielsweise aus der EP 378 826 A2 der DE 198 57 984 A1 sowie der EP 891 525 B1 bekannt.When UV inks are used, UV emitters and especially excimer emitters are used as dryers. The UV radiation directed at the printed side of the sheets must be designed with regard to intensity and distribution in such a way that complete curing of the colors is achieved even at maximum printing speed. Not complete curing of the color will lead to damage and thus waste when touching the sheet with sheet guiding devices or in the boom. Excimer radiators for sheetfed offset printing presses are for example from EP 378 826 A2 of the DE 198 57 984 A1 as well as the EP 891 525 B1 known.

Die in röhrenförmig ausgebildeten Excimer-Strahlern erzeugte Strahlung ist stark divergent. Dies hat seinen Grund darin, dass der Entladungsraum einen kreisförmigen Querschnitt aufweist, gebildet durch die innere und äußere Röhre des das Dielektrikum aufnehmenden Raumes. Flächenstrahler mit einem rechteckigen Reflektor liefern nur im Nahbereich (auf einige Millimeter) technisch nutzbare Bestrahlungsleistungen. Zudem nimmt mit zunehmenden Abstand die UV-Intensität stark ab.The radiation generated in tubular excimer emitters is highly divergent. This is because the discharge space has a circular cross section formed by the inner and outer tubes of the dielectric accommodating space. Area radiators with a rectangular reflector provide only at close range (on some Millimeters) technically usable irradiation powers. In addition, the UV intensity decreases sharply with increasing distance.

Bei Bogenoffsetdruckmaschinen liegt der Abstand zwischen Strahler und Bedruckstoffebene aus technischen Gründen im Bereich einige Zentimeter. Zudem ist der Einbauraum oft begrenzt. Um technisch nutzbare Intensitäten zu erzielen, muss die Strahlung daher gerichtet werden.For sheet-fed offset printing presses, the distance between spotlight and substrate level is in the range of a few centimeters for technical reasons. In addition, the installation space is often limited. In order to achieve technically usable intensities, the radiation must therefore be directed.

Der UV-Strahler gemäß der EP 891525 B1 weist eine sich über die Formatbreite der Maschine erstreckende Röhre als Strahlungserzeuger auf, welche mit einem in einem Gehäuse angeordneten Reflektor zusammenwirkt. Die durch die Röhre erzeugte Strahlung wird gerichtet auf den Bedruckstoff gelenkt. Gerade bei schnelllaufenden Bogendruckmaschinen ist es im UV-Farbendruck wichtig, eine hohe Strahlungsleistung in dem vom Excimer-Strahler bestrahlten Bereich des Druckbogens zu erzielen. Zu einer vollständigen Aushärtung der Druckfarben werden oft auch mehrere Einzelstrahler hintereinander geschaltet, was jedoch entsprechenden Bauraum in der Druckmaschine voraussetzt.The UV emitter according to the EP 891525 B1 has a extending over the format width of the machine tube as a radiation generator, which cooperates with a reflector arranged in a housing. The radiation generated by the tube is directed directed onto the substrate. Especially in high-speed sheet-fed printing machines, it is important in UV color printing to achieve a high radiation power in the area of the printed sheet irradiated by the excimer radiator. To complete curing of the printing inks, multiple individual emitters are often connected in series, which, however, requires appropriate installation space in the printing press.

[Aufgabe der Erfindung]OBJECT OF THE INVENTION

Aufgabe der vorliegenden Erfindung ist es daher, einen Excimer-Strahler gemäß dem Oberbegriff von Anspruch 1 derartig zu erweitern, so dass eine hohe Strahlungsleistung bei kompakter Bauform möglich ist.Object of the present invention is therefore to extend an excimer radiator according to the preamble of claim 1 such that a high radiation power in a compact design is possible.

Gelöst wird diese Aufgabe durch die kennzeichnenden Merkmale von Anspruch 1.This object is achieved by the characterizing features of claim 1.

[Beispiele][Examples]

Nach der Erfindung ist vorgesehen, dass in einem Gehäuse parallel zueinander verlaufende Excimer-Strahlerröhren mit jeweils einem zugeordneten Reflektor angeordnet sind. Dadurch ergibt sich eine hohe Strahlungsbündelung sowie eine kompakte Bauform. Die den Excimer-Strahlerröhren zugeordneten Reflektoren sind dabei bevorzugt von parabolischer Form. Vorzugsweise sind 2 Röhren vorgesehen.According to the invention, it is provided that in a housing mutually parallel excimer radiator tubes are each arranged with an associated reflector. This results in a high radiation bundling and a compact design. The reflectors associated with the excimer radiator tubes are preferably of parabolic shape. Preferably, 2 tubes are provided.

Die parallele Anordnung von zwei Strahlerröhren in einem Gehäuse mit zugeordneten und vorzugsweise einen gemeinsam Reflektor bildenden Reflektorteilen ergibt eine optimale Bestrahlung des Bedruckstoffes im jeweilig vorgegebenen Abstand. Entsprechend dem Abstand wird die Spiegelgeometrie berechnet. Die entsprechenden Parameter sind hierbei die Spiegelform, die Position/Orientierung der Strahlerröhre zum Spiegel sowie der Neigungswinkel der Spiegelelemente zueinander.The parallel arrangement of two radiator tubes in a housing with associated and preferably a common reflector forming reflector parts results in optimal irradiation of the printing substrate in the respective predetermined distance. The mirror geometry is calculated according to the distance. The corresponding parameters here are the mirror shape, the position / orientation of the radiation tube to the mirror and the angle of inclination of the mirror elements to each other.

Des weiteren erfolgt die Erläuterung eines Ausführungsbeispiels der Erfindung anhand der Zeichnung. Diese zeigt die Anordnung der zwei Strahlerröhren mit zugeordneten Reflektor in perspektivischer Ansicht.Furthermore, the explanation of an embodiment of the invention with reference to the drawing. This shows the arrangement of the two radiator tubes with associated reflector in a perspective view.

Zwei Strahlerröhren 2 und 3 verlaufen parallel innerhalb eines nach unten strahlungsdurchlässigen (offenen) Gehäuses 1. Die Strahlerrören 2 und 3 sind durch in der Figur nicht dargestellte Aufnahmen an beiden Enden in jeweiligen Halterungen des Gehäuses 1 befestigt.Two radiator tubes 2 and 3 run parallel within a downwardly radiation-transmissive (open) housing 1. The Strahlerrören 2 and 3 are fixed by not shown in the figure shots at both ends in respective brackets of the housing 1.

Jeder Strahlerröhre 2, 3 ist ein Reflektorabschnitt 4, 5 zugeordnet, welche ein gemeinsames Reflektorsystem bilden. Die Reflektorabschnitte 4, 5 sind dabei hinsichtlich der Anordnung und Beabstandung der Strahlerröhren 2, 3 so berechnet und gestaltet, so dass sich in einem gewünschten Abstand der Strahlerröhren 2, 3 die erforderliche Strahlungsstärke ergibt.Each emitter tube 2, 3 is associated with a reflector section 4, 5, which form a common reflector system. The reflector sections 4, 5 are calculated and designed with respect to the arrangement and spacing of the radiator tubes 2, 3, so that in a desired Distance between the radiator tubes 2, 3 results in the required radiation intensity.

[Bezugszeichenliste][REFERENCE LIST]

11
Gehäusecasing
22
Strahlerröhreradiator tube
33
Strahlerröhreradiator tube
44
Reflektorabschnittreflector section
55
Reflektorabschnittreflector section

Claims (1)

  1. An excimer radiator for the dryer of a printing press, more preferably sheet-fed rotary printing press, consisting of a radiator tube arranged in a housing and an associated reflector, wherein in the housing (1) two radiator tubes (2,3) oriented parallel to each other are arranged, each of which radiator tubes being assigned a reflector section (4,5) for generating an intentional radiation distribution, and wherein the reflector sections (4,5) are formed by a common reflector system, characterized in that the reflector sections (4,5) comprise a parabolically shaped cross-sectional curve and that the reactor sections (4,5) merging with one another form a common reflector, wherein the legs facing inwards towards each other are shorter than the legs of the cross sectional curve of the reflector sections facing outwards away from each other.
EP03026705A 2002-12-06 2003-11-21 Excimer radiator for the drier of a printing press Expired - Lifetime EP1426182B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20218908U 2002-12-06
DE20218908U DE20218908U1 (en) 2002-12-06 2002-12-06 Excimer heater for the dryer of a printing press

Publications (2)

Publication Number Publication Date
EP1426182A1 EP1426182A1 (en) 2004-06-09
EP1426182B1 true EP1426182B1 (en) 2008-01-16

Family

ID=7977701

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03026705A Expired - Lifetime EP1426182B1 (en) 2002-12-06 2003-11-21 Excimer radiator for the drier of a printing press

Country Status (5)

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US (1) US7047662B2 (en)
EP (1) EP1426182B1 (en)
JP (1) JP2004188975A (en)
AT (1) ATE383948T1 (en)
DE (2) DE20218908U1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007256334A (en) * 2006-03-20 2007-10-04 Nec Lcd Technologies Ltd Color filter printing method, color filter printing apparatus, and color filter substrate
US20100154244A1 (en) * 2008-12-19 2010-06-24 Exfo Photonic Solutions Inc. System, Method, and Adjustable Lamp Head Assembly, for Ultra-Fast UV Curing
WO2012014518A1 (en) * 2010-07-30 2012-02-02 Ｎｋワークス株式会社 Ultraviolet irradiation device
CA3147912A1 (en) * 2021-02-05 2022-08-05 Inforesight Consumer Products Inc. Radiant heater

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB557252A (en) * 1942-08-19 1943-11-11 Gen Electric Co Ltd Improvements in apparatus for exposing objects to radiant heat
US4037112A (en) * 1975-03-25 1977-07-19 Ppg Industries, Inc. Apparatus for crosslinking ultraviolet light curable coatings
GB2096294B (en) * 1981-02-25 1984-06-20 Svecia Silkscreen Maskiner Ab Drier
FI841491A (en) * 1983-04-25 1984-10-26 Christian Lumpp ANORDING FOR COMMANDING REFLECTION OF INFRARED ELLER ULTRAVIOLET STRAOLNING.
JPS6015189A (en) * 1983-07-07 1985-01-25 Namiki Precision Jewel Co Ltd Baked printing of reinforced glass
US4727655A (en) * 1987-02-02 1988-03-01 Amjo Infra Red Dryers, Inc. Heat lamp assembly with air duct
US4983852A (en) * 1988-11-17 1991-01-08 Burgio Joseph T Jr System and method for photochemically curing a coating on a substrate
DE3901165A1 (en) 1989-01-17 1990-08-02 Heidelberger Druckmasch Ag DEVICE FOR DRYING COLORS ON PAPER
US5761377A (en) * 1995-09-28 1998-06-02 Holmes Products Corporation Tower type portable radiant heater
GB9607129D0 (en) 1996-04-04 1996-06-12 Gew Ec Ltd Uv dryer with improved reflector
US6058621A (en) * 1998-06-05 2000-05-09 Eastman Kodak Company Apparatus and method for drying photosensitive material using radiant heat and air flow passages
DE19857984B4 (en) 1998-12-16 2007-12-27 Koenig & Bauer Aktiengesellschaft Dryer working with excimer lamps in sheet-fed presses

Also Published As

Publication number Publication date
US20040168596A1 (en) 2004-09-02
DE20218908U1 (en) 2003-02-13
JP2004188975A (en) 2004-07-08
EP1426182A1 (en) 2004-06-09
US7047662B2 (en) 2006-05-23
DE50309015D1 (en) 2008-03-06
ATE383948T1 (en) 2008-02-15

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