EP1807264B1 - Fan unit in a drier for a printer - Google Patents

Fan unit in a drier for a printer Download PDF

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Publication number
EP1807264B1
EP1807264B1 EP05796360A EP05796360A EP1807264B1 EP 1807264 B1 EP1807264 B1 EP 1807264B1 EP 05796360 A EP05796360 A EP 05796360A EP 05796360 A EP05796360 A EP 05796360A EP 1807264 B1 EP1807264 B1 EP 1807264B1
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EP
European Patent Office
Prior art keywords
fan unit
air duct
unit according
gaseous medium
deep
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EP05796360A
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German (de)
French (fr)
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EP1807264A1 (en
Inventor
Volker Schröder
Uwe Rogge
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Windmoeller and Hoelscher KG
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Windmoeller and Hoelscher KG
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Publication of EP1807264A1 publication Critical patent/EP1807264A1/en
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    • 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
    • B41F23/0403—Drying webs
    • B41F23/0423—Drying webs by convection
    • B41F23/0426—Drying webs by convection using heated air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes

Definitions

  • the invention relates to a blower unit for drying a printing material provided with printing ink in a printing press according to the preamble of claim 1 and to a method for producing a blower unit according to the preamble of claim 12.
  • blower units are usually components of dryers, which serve to dry freshly printed substrate.
  • the printing material is subjected to this with heated air so that the solvent present in the ink, which is still moist, evaporates more rapidly.
  • a printing press is usually equipped with a plurality of such dryers. In the transport direction of the printing material is behind each printing unit at least one such dryer.
  • Such a dryer therefore comprises at least one air supply unit which generates heated air.
  • the heated air is passed on to the blower units via a line and possibly distribution system.
  • These blower units serve to distribute the air supplied to them evenly over the entire width of the printing material.
  • the elongate blower units are aligned in their axial direction substantially transversely to the transport direction of the printing material.
  • the blower unit has, preferably at one of its end faces, a feed opening to which the air-supplying line can be connected.
  • the opposite end face of the blower unit can be closed.
  • the body of such a blower unit comprises a hollow body, wherein this can have any cross-section.
  • this hollow body is limited by the outer surface of the blower unit.
  • This hollow body serves as an air-conducting channel.
  • the blower unit has a plurality of openings through which the air is passed onto the printing material. The openings are mounted so that the air reaches the substrate by the shortest route.
  • These openings can be introduced in the form of holes in the hollow body. In general, however, these are in the hollow body recesses introduced, for example, punched.
  • a known blower unit is usually made of several sheets. To shape the hollow body, a corresponding sheet is folded. The openings are introduced into a second, in length substantially corresponding to the first metal sheet, which is then connected to the first plate in a suitable manner. For cost reasons, this is often a riveted joint. The front ends are gained from other sheets, which also receive folds, which are then slipped over the end portions of the hollow body. The overlapping areas are then also riveted.
  • the DE 44 42 940 A1 and the EP 1 279 498 A2 a blow bar with a housing main body, which is a piece of extruded profile material.
  • blow molding strips which have a feed opening at one end face, via which the gaseous medium can be introduced into the air channel, there is the problem that the gaseous medium does not exit uniformly from all the nozzles.
  • the utility model DE 297 14 455 U1 Therefore proposes to provide cans of different diameters, which are also spaced differently far from each other.
  • blower unit with such a nozzle arrangement is also expensive to produce and therefore expensive.
  • Object of the present invention is therefore to propose a blower unit and a manufacturing method, so that the blower unit can be produced more cheaply.
  • a flow-guiding element is arranged in the interior of the air duct in the flow direction of the gaseous medium immediately behind the connecting piece.
  • This flow guide makes it possible to direct the gaseous medium within the air duct in a desired direction, for example in the direction of the openings.
  • blower unit itself contains extruded, deep-drawn or cast material.
  • blower units may be manufactured by cutting the corresponding extruded profile to the length needed for the blower units.
  • a further processing, in particular a mechanical shaping, can be dispensed with.
  • the cross-sectional profile of the blower units can be changed according to the requirements. For example, it is possible to choose a profile that causes a uniform flow of air within the fan unit.
  • the extruded, deep-drawn or cast material at least partially comprises the air duct.
  • the extruded, deep-drawn or cast material comprises the air duct together with at least one perforated strip into which at least some of the openings are made.
  • the perforated strip thus limits parts of the air duct and can also be made of extruded, deep-drawn or cast material.
  • the perforated strip may be made of other material and / or manufactured independently and later with the material, which limit other parts of the air duct, are connected.
  • the extruded, deep-drawn or cast material comprises the air duct entirely, whereby the production of a perforated strip is no longer necessary.
  • the openings can then be made for example by introducing holes.
  • the blower unit then consists of a single hollow body.
  • a fan unit containing extruded aluminum.
  • Such a blower unit may be more stable or lighter with equal weight compared to prior art blower units.
  • the perforated strip in which the openings through which the gaseous medium exits the blower unit, at least partially plastic. It must therefore not the openings from which the air is directed in the direction of the substrate in the Air duct are introduced.
  • a perforated strip can be connected in the simplest possible way with the air duct. This can be done by a screw.
  • the fan unit can also have two mutually facing grooves, in which a correspondingly shaped hole bar can be inserted in the axial direction of the air channel. The use of connecting parts such as screws or rivets is completely eliminated in this case, which reduces the assembly effort.
  • a perforated strip may be an arbitrarily shaped component and may have openings that have different contours.
  • the openings may be circular or oval. However, slots are advantageous. Also, a nozzle-shaped configuration of the openings is conceivable.
  • the ZufUhröffnurtgen the blower unit can be connected to a connection piece, which is designed as a separate component.
  • a molded according to the profile of the blower unit or the air duct, separate component needs to be plugged only on the front side of the profile and optionally screwed with this.
  • the connecting piece also has a, preferably circular, neck on its side facing away from the fan unit, to which the gaseous medium supplying lines are connected.
  • connection piece comprises a plastic molded part.
  • a molded part can also be produced very inexpensively.
  • To form the connecting piece and the flow guide in one piece is particularly advantageous. In this way, the assembly costs of the blower unit are at least not substantially increased despite the provision of a flow guide.
  • the invention further includes a method of manufacturing a blower unit.
  • the blower unit is manufactured Material whose final shape has been defined in a forming process at least 100 degrees Celsius.
  • a shaping element for example a casting mold.
  • Suitable forming processes are, for example, extrusion molding and deep drawing.
  • the material to be molded is heated at least to the specified temperature to allow shaping. For metals, this is a temperature in the range, usually slightly below, the melting temperature. However, with metals, a temperature above the melting point is required when a casting method is provided as the forming method.
  • the inventive method can also be used for forming plastics.
  • frost line which denotes a temperature above which the plastic is malleable. All materials mentioned are common, at least, with which process they are formed must be heated to 100 degrees Celsius.
  • Fig. 1 shows a blower unit 1.
  • This blower unit 1 is a gaseous medium, preferably heated air, supplied in the transport direction z via the connecting piece 2. This gaseous medium then exits the blower unit 1 in the direction y through the openings 3.
  • the blower unit 1 consists essentially of four components. In detail, these are the hollow body 4, the connecting piece 2, the end cover 5 and the hole or nozzle bar 6.
  • a flow guide 7 In fixed connection with the connecting piece 2 is a flow guide 7.
  • the connecting piece 2 and the flow guide 7 can be used as a component, advantageously as a plastic molding be executed.
  • the flow guide element 7 deflects a part of the medium flowing through the connection piece into the blower unit so that the openings 3, which are located directly behind the connection piece in the transport direction z, are also exposed to the flowing medium. Without the flow-guiding element, too little a proportion of the medium would escape through the first openings 3. In the end, the paint applied to the substrate would dry unevenly.
  • the end cover 5 may be formed as a single molded part. In the illustrated embodiment, however, the end cover 5 consists of two molded parts, wherein the molded part 8 is attached from the inside to the end cover 5.
  • the molded part 8 has a pin 9 which extends through a hole in the end cover 5 to the outside.
  • the pin 9 is cylindrical.
  • the pin 9 serves to support the entire blower unit 1 on a base, for example in the machine frame.
  • Pin 9 and the connecting piece 2 are advantageously arranged so that their axes are aligned.
  • the second, provided with the connecting piece 2 end of the blower unit 1 is supported by a to be connected to the connecting piece 2 piece of pipe.
  • the fan unit can be rotated due to this type of storage, so that the openings 3 can be made easily accessible for cleaning.
  • FIG. 2 shows the section II - II according to FIG. 1 ,
  • 10 denotes a part of the surface of the hollow body 4.
  • This part 10 has at its edge regions only a very small material thickness, so that the part of the surface 10 can be broken out.
  • the nozzle bar 6 is connected to the hollow body 4.
  • the hollow body 4 grooves or guides 11.
  • the nozzle bar 6 has at its edge regions 12 complementary profiles. For assembly, therefore, the nozzle bar 6 only needs to be inserted from one end face into the grooves or guides 11 of the hollow body 4.
  • FIG. 3 shows the view of an end face of the blower unit 1 according to section III - III in FIG. 1 , This end face is closed with the end cover 5. This end cover is fixed with screws 13 on the hollow body 4. To recognize is still the pin 9th
  • FIG. 4 shows a perspective view of the blower unit 1, consisting of the hollow body 4, the connecting piece 2 and the nozzle bar.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Drying Of Solid Materials (AREA)
  • Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Duct Arrangements (AREA)

Abstract

The invention relates to a fan unit (1) for drying a printed material that is provided with ink in a printer. Said fan unit comprises an air channel that runs transversally to the transport direction of the printed material, at least one opening (3), through which a gaseous medium can be conducted from the air channel towards the printed material and a feed opening (2), via which the gaseous medium can be introduced into the air channel. The aim of the invention is to produce a fan unit (1) of this type in a more cost-effective manner. To achieve this, the fan unit contains extruded, deep-drawn or cast material. The invention also relates to a method for producing a fan unit (1).

Description

Die Erfindung betrifft eine Gebläseeinheit zum Trocknen eines mit Druckfarbe versehenen Bedruckstoffes in einer Druckmaschine gemäß dem Oberbegriff des Anspruchs 1 sowie ein Verfahren zur Herstellung einer Gebläseeinheit gemäß dem Oberbegriff des Anspruchs 12.The invention relates to a blower unit for drying a printing material provided with printing ink in a printing press according to the preamble of claim 1 and to a method for producing a blower unit according to the preamble of claim 12.

Derartige Gebläseeinheiten sind in der Regel Bestandteile von Trocknern, die dazu dienen, frisch bedruckten Bedruckstoff zu trocknen. In der Regel wird dazu der Bedruckstoff mit erwärmter Luft beaufschlagt, so dass das in der noch feuchten Druckfarbe vorliegende Lösungsmittel beschleunigt verdunstet. Eine Druckmaschine ist in der Regel mit einer Mehrzahl solcher Trockner ausgestattet. In Transportrichtung des Bedruckstoffes befindet sich hinter jedem Druckwerk zumindest ein derartiger Trockner.Such blower units are usually components of dryers, which serve to dry freshly printed substrate. As a rule, the printing material is subjected to this with heated air so that the solvent present in the ink, which is still moist, evaporates more rapidly. A printing press is usually equipped with a plurality of such dryers. In the transport direction of the printing material is behind each printing unit at least one such dryer.

Ein solcher Trockner umfasst daher zumindest eine Luftversorgungseinheit, welche erwärmte Luft erzeugt. Selbstverständlich können anstelle der Luft auch andere geeignete Gase verwendet werden. Die erwärmte Luft wird über ein Leitungs- und gegebenenfalls Verteilungssystem an Gebläseeinheiten weitergeleitet Diese Gebläseeinheiten dienen dazu, die ihnen zugeleitete Luft gleichmäßig über die gesamte Breite des Bedruckstoffes zu verteilen. Dazu sind die länglich ausgebildeten Gebläseeinheiten in ihrer axialen Richtung im wesentlichen quer zur Transportrichtung des Bedruckstoffes ausgerichtet. Die Gebläseeinheit weist, vorzugsweise an einer Ihrer Stirnseiten, eine Zuführöffnung auf, an die die Luft zuführende Leitung angeschlossen werden kann. Die gegenüber liegende Stirnseite der Gebläseeinheit kann verschlossen sein. Der Körper einer solchen Gebläseeinheit umfasst einen Hohlkörper, wobei dieser einen beliebigen Querschnitt aufweisen kann. Oft wird dieser Hohlkörper durch die Außenfläche der Gebläseeinheit begrenzt. Dieser Hohlkörper dient als luftführender Kanal. Entlang der axialen Erstreckung weist die Gebläseeinheit mehrere Öffnungen auf, durch die die Luft auf den Bedruckstoff geleitet wird. Dabei sind die Öffnungen so angebracht, dass die Luft den Bedruckstoff auf kürzestem Wege erreicht. Diese Öffnungen können in Form von Bohrungen in den Hohlkörper eingebracht sein. In der Regel sind dies jedoch In den Hohlkörper eingebrachte Aussparungen, beispielsweise Ausstanzungen.Such a dryer therefore comprises at least one air supply unit which generates heated air. Of course, other suitable gases can be used instead of the air. The heated air is passed on to the blower units via a line and possibly distribution system. These blower units serve to distribute the air supplied to them evenly over the entire width of the printing material. For this purpose, the elongate blower units are aligned in their axial direction substantially transversely to the transport direction of the printing material. The blower unit has, preferably at one of its end faces, a feed opening to which the air-supplying line can be connected. The opposite end face of the blower unit can be closed. The body of such a blower unit comprises a hollow body, wherein this can have any cross-section. Often, this hollow body is limited by the outer surface of the blower unit. This hollow body serves as an air-conducting channel. Along the axial extent, the blower unit has a plurality of openings through which the air is passed onto the printing material. The openings are mounted so that the air reaches the substrate by the shortest route. These openings can be introduced in the form of holes in the hollow body. In general, however, these are in the hollow body recesses introduced, for example, punched.

Eine bekannte Gebläseeinheit wird In der Regel aus mehreren Blechen hergestellt. Zur Formung des Hohlkörpers wird ein entsprechendes Blech abgekantet. Die Öffnungen werden in ein zweites, in der Länge im wesentlichen dem ersten Blech entsprechendes Blech eingebracht, welches dann mit dem ersten Blech auf geeignete Weise verbunden wird. Aus Kostengründen ist dies häufig eine Nietverbindung. Die stirnseitigen Abschlüsse werden aus weiteren Blechen gewannen, wobei diese ebenfalls Abkantungen erhalten, die dann über die Endbereiche des Hohlkörpers gestülpt werden. Die sich überlappenden Bereiche werden dann ebenfalls vernietet.A known blower unit is usually made of several sheets. To shape the hollow body, a corresponding sheet is folded. The openings are introduced into a second, in length substantially corresponding to the first metal sheet, which is then connected to the first plate in a suitable manner. For cost reasons, this is often a riveted joint. The front ends are gained from other sheets, which also receive folds, which are then slipped over the end portions of the hollow body. The overlapping areas are then also riveted.

Das beschriebene Herstellungsverfahren ist allerdings sehr aufwändig.However, the production method described is very complex.

Aus diesem Grund schlagen die DE 44 42 940 A1 und die EP 1 279 498 A2 eine Blasleiste mit einem Gehäusehauptkörper vor, der ein Stück eines extrudierten Profilmaterials ist.For this reason, the DE 44 42 940 A1 and the EP 1 279 498 A2 a blow bar with a housing main body, which is a piece of extruded profile material.

Bei solchen Blasleisten, die an einem stirnseitigen Ende eine Zuführöffnung aufweisen, über welche das gasförmige Medium in den luftkanal einleitbar ist, besteht das Problem, dass das gasförmige Medium nicht gleichmäßig aus allen Düsen austritt.In the case of such blow molding strips, which have a feed opening at one end face, via which the gaseous medium can be introduced into the air channel, there is the problem that the gaseous medium does not exit uniformly from all the nozzles.

Das Gebrauchsmuster DE 297 14 455 U1 schlägt daher vor, Dosen mit unterschiedlichen Durchmessern, die zudem unterschiedlich weit voneinander beabstandet sind, vorzusehen.The utility model DE 297 14 455 U1 Therefore proposes to provide cans of different diameters, which are also spaced differently far from each other.

Eine Gebläseeinheit mit einer solchen Düsenanordnung ist jedoch ebenfalls aufwändig herzustellen und daher teuer.However, a blower unit with such a nozzle arrangement is also expensive to produce and therefore expensive.

Aufgabe der vorliegenden Erfindung ist es daher, eine Gebläseeinheit und ein Herstellungsverfahren vorzuschlagen, so dass die Gebläseeinheit kostengünstiger hergestellt werden kann.Object of the present invention is therefore to propose a blower unit and a manufacturing method, so that the blower unit can be produced more cheaply.

Die Aufgabe wird durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst.The object is solved by the characterizing features of claim 1.

Demnach ist im inneren des Luftkanals in Strömungsrichtung des gasförmigen Mediums unmittelbar hinter dem Anschlussstutzen ein Strömungsleitelement angeordnet. Dieses Strömungsleitelement ermöglicht es, das gasförmige Medium innerhalb des Luftkanals in eine gewünschte Richtung zu lenken, beispielsweise in Richtung auf die Öffnungen. So ist es von Gebläseeinheiten des Standes der Technik bekannt, dass durch die ersten Öffnungen der Lochleiste kein oder nur wenig gasförmiges Medium aus dem Luftkanal austritt. Mit dem Strömungsleitelement kann dieser Nachteil vermieden werden und ein Teil des gasförmigen Mediums verstärkt in Richtung auf diese ersten Öffnungen gelenkt werden. Der Volumenstrom kann damit für alle Öffnungen vergleichmäßigt werden. Ein solches Strömungsleitelement ist kostengünstig herzustellen und in der Gebläseeinheit einzusetzen.Accordingly, a flow-guiding element is arranged in the interior of the air duct in the flow direction of the gaseous medium immediately behind the connecting piece. This flow guide makes it possible to direct the gaseous medium within the air duct in a desired direction, for example in the direction of the openings. Thus, it is known from blower units of the prior art that no or only little gaseous medium exits through the first openings of the perforated strip from the air duct. With the flow guide this disadvantage can be avoided and a part of the gaseous medium reinforced in the direction of these first openings are directed. The volume flow can thus be made uniform for all openings. Such a flow guide is inexpensive to manufacture and use in the blower unit.

Die Gebläseeinheit selbst enthält stranggepresstes, tiefgezogenes oder gegossenes Material. Auf diese Weise können mehrere Gebläseeinheiten oder Teile davon sehr rationell und damit kostengünstig hergestellt werden. Wird das Material beispielsweise stranggepresst, so können Gebläseeinheiten dadurch hergestellt werden, dass das entsprechend stranggepresste Profil in der für die Gebläseeinheiten benötigten Länge abgelängt wird. Eine weitere Bearbeitung, insbesondere eine mechanische Formgebung, kann damit entfallen. Auch kann das Querschnittsprofil der Gebläseeinheiten den Anforderungen entsprechend verändert werden. So ist es beispielsweise möglich, ein Profil zu wählen, das eine gleichmäßige Strömung der Luft innerhalb der Gebläseeinheit hervorruft.The blower unit itself contains extruded, deep-drawn or cast material. In this way, a plurality of fan units or parts thereof can be produced very efficiently and thus inexpensively. For example, if the material is extruded, blower units may be manufactured by cutting the corresponding extruded profile to the length needed for the blower units. A further processing, in particular a mechanical shaping, can be dispensed with. Also, the cross-sectional profile of the blower units can be changed according to the requirements. For example, it is possible to choose a profile that causes a uniform flow of air within the fan unit.

Ein weiterer Vorteil derartiger Gebläseeinheiten liegt in der Effizienz während des Betriebes. Aufgrund der in Gebläseeinheiten des Standes der Technik vorhandenen Niet- oder Schraubverbindungen sind Spalte nicht zu verhindern, durch die gasförmiges Medium entweichen kann. Derartige Undichtigkeiten darstellende Spalte oder Schlitze können in einer erfindungsgemäßen Vorrichtung vermieden werden, so dass bei gleicher Trocknungsleistung ein geringerer Mediendurchsatz nötig ist.Another advantage of such fan units is the efficiency during operation. Because of the rivet or screw connections present in blower units of the prior art, gaps can not be prevented through which gaseous medium can escape. Such leaks performing column or slots can be avoided in a device according to the invention, so that a lower media throughput is necessary for the same drying performance.

In einer bevorzugten Ausführungsform der Erfindung umfasst das stranggepresste, tiefgezogene oder gegossene Material zumindest teilweise den Luftkanal. Insbesondere ist es zweckmäßig, wenn das stranggepresste, tiefgezogene oder gegossene Material den Luftkanal zusammen mit zumindest einer Lochleiste, in welche zumindest ein Teil der Öffnungen eingebracht sind, umfasst. Die Lochleiste begrenzt also Teile des Luftkanals und kann ebenfalls aus stranggepresstern, tiefgezogenem oder gegossenem Material bestehen. Die Lochleiste kann jedoch aus anderem Material bestehen und/oder unabhängig hergestellt und später mit dem Material, welches weitere Teile des Luftkanals begrenzen, verbunden werden.In a preferred embodiment of the invention, the extruded, deep-drawn or cast material at least partially comprises the air duct. In particular, it is expedient if the extruded, deep-drawn or cast material comprises the air duct together with at least one perforated strip into which at least some of the openings are made. The perforated strip thus limits parts of the air duct and can also be made of extruded, deep-drawn or cast material. However, the perforated strip may be made of other material and / or manufactured independently and later with the material, which limit other parts of the air duct, are connected.

In einer weiteren vorteilhaften Ausführungsform umfasst das stranggepresste, tiefgezogene oder gegossene Material den Luftkanal gänzlich, wodurch das Herstellen einer Lochleiste nicht mehr notwendig ist. Die Öffnungen können dann beispielsweise durch Einbringen von Bohrungen hergestellt werden. Die Gebläseeinheit besteht dann aus einem einzigen Hohlkörper.In a further advantageous embodiment, the extruded, deep-drawn or cast material comprises the air duct entirely, whereby the production of a perforated strip is no longer necessary. The openings can then be made for example by introducing holes. The blower unit then consists of a single hollow body.

Bevorzugt wird eine Gebläseeinheit, welche stranggepresstes Aluminium enthält. Eine solche Gebläseeinheit kann im Vergleich zu Gebläseeinheiten des Standes der Technik bei gleichem Gewicht stabiler beziehungsweise bei gleicher Stabilität leichter sein.Preferred is a fan unit containing extruded aluminum. Such a blower unit may be more stable or lighter with equal weight compared to prior art blower units.

In weiterer Ausgestaltung der Erfindung umfasst die Lochleiste, in welcher die Öffnungen, durch welche das gasförmige Medium aus der Gebläseeinheit austritt, zumindest teilweise Kunststoff. Es müssen also nicht die Öffnungen, aus denen die Luft in Richtung auf den Bedruckstoff geleitet wird, in den Luftkanal eingebracht werden. Eine derartige Lochleiste kann auf möglichst einfache Weise mit dem Luftkanal verbunden werden. Dieses kann durch eine Verschraubung erfolgen. Die Gebläseeinheit kann aber auch zwei zueinander zugewandte Nuten aufweisen, in die eine entsprechend ausgeformte Lochleiste in axialer Richtung des Luftkanals eingeschoben werden kann. Die Verwendung von Verbindungsteilen wie Schrauben oder Nieten entfällt in diesem Fall vollständig, was den Montageaufwand reduziert. Der gegenüber dem Aluminium weichere Kunststoff hat zur Folge, dass sich die Lochleiste in die Nuten der Gebläseeinheit einschieben lässt, ohne dass es zu Verklemmungen kommt. Eine Lochleiste kann ein beliebig geformtes Bauteil sein und kann Öffnungen aufweisen, die verschiedenartige Konturen aufweisen. Die Öffnungen können kreisrund oder oval sein. Vorteilhaft sind jedoch Langlöcher. Auch eine düsenförmige Ausgestaltung der Öffnungen ist denkbar.In a further embodiment of the invention, the perforated strip, in which the openings through which the gaseous medium exits the blower unit, at least partially plastic. It must therefore not the openings from which the air is directed in the direction of the substrate in the Air duct are introduced. Such a perforated strip can be connected in the simplest possible way with the air duct. This can be done by a screw. However, the fan unit can also have two mutually facing grooves, in which a correspondingly shaped hole bar can be inserted in the axial direction of the air channel. The use of connecting parts such as screws or rivets is completely eliminated in this case, which reduces the assembly effort. The softer the plastic compared to the aluminum has the consequence that the perforated strip can be inserted into the grooves of the fan unit, without causing jamming. A perforated strip may be an arbitrarily shaped component and may have openings that have different contours. The openings may be circular or oval. However, slots are advantageous. Also, a nozzle-shaped configuration of the openings is conceivable.

In weiterer vorteilhafter Ausgestaltung der Erfindung sind die ZufUhröffnurtgen der Gebläseeinheit mit einem Anschlussstutzen verbindbar, der als separates Bauteil ausgeführt ist. Ein entsprechend dem Profil der Gebläseeinheit oder des Luftkanals ausgeformtes, separates Bauteil braucht nur auf die Stirnseite des Profils aufgesteckt und gegebenenfalls mit diesem verschraubt zu werden. Der Anschlussstutzen weist zudem einen, bevorzugt kreisrunden, Stutzen auf seiner der Gebläseeinheit abgewandten Seite auf, an welchen die das gasförmige Medium zuführende Leitungen angeschlossen werden.In a further advantageous embodiment of the invention, the ZufUhröffnurtgen the blower unit can be connected to a connection piece, which is designed as a separate component. A molded according to the profile of the blower unit or the air duct, separate component needs to be plugged only on the front side of the profile and optionally screwed with this. The connecting piece also has a, preferably circular, neck on its side facing away from the fan unit, to which the gaseous medium supplying lines are connected.

Vorteilhaft ist es dabei, wenn der Anschlussstutzen ein Kunststoffformteil umfasst. Ein solches Formteil lässt sich ebenfalls sehr kostengünstig produzieren. Besonders vorteilhaft ist es, den Anschlussstutzen und das Strömungsleitelement einstückig auszubilden. Auf diese Weise werden die Montagekosten der Gebläseeinheit trotz des Vorsehens eines Strömungsleitelements zumindest nicht wesentlich erhöht.It is advantageous if the connection piece comprises a plastic molded part. Such a molded part can also be produced very inexpensively. To form the connecting piece and the flow guide in one piece is particularly advantageous. In this way, the assembly costs of the blower unit are at least not substantially increased despite the provision of a flow guide.

Die Erfindung umfasst weiterhin ein Verfahren zur Herstellung einer Gebläseeinheit, Bei diesem Verfahren wird zur Herstellung der Gebläseeinheit Material verwendet, dessen endgültige Form in einem Umformverfahren bei zumindest 100 Grad Celsius definiert wurde. Unter "Definition einer Form" ist dabei zu verstehen, dass das Material durch ein formgebendes Element, beispielsweise eine Gießform, in seine endgültige Form gebracht wurde. Geeignete Umformverfahren sind beispielsweise das Strangpressen und das Tiefziehen. Das zu formende Material wird dabei mindestens auf die angegebene Temperatur erwärmt, um eine Formgebung zu ermöglichen. Bei Metallen ist dies eine Temperatur im Bereich, zumeist etwas unterhalb, der Schmelztemperatur. Jedoch ist bei Metallen eine Temperatur oberhalb des Schmelzepunktes erforderlich, wenn ein Gießverfahren als Umformverfahren vorgesehen ist. Das erfindungsgemäße Verfahren kann auch zur Umformung von Kunststoffen verwendet werden. Bei Kunststoffen spricht man häufig nicht von der Schmelze- oder Kristallisationstemperatur, sondern von der sogenannten Frostlinie, die eine Temperatur bezeichnet, oberhalb welcher der Kunststoff formbar ist Allen genannten Materialien ist gemeinsam, dass sie, ganz gleich, mit welchem Verfahren sie umgeformt werden, zumindest auf 100 Grad Celsius erwärmt werden müssen.The invention further includes a method of manufacturing a blower unit. In this method, the blower unit is manufactured Material whose final shape has been defined in a forming process at least 100 degrees Celsius. By "definition of a mold" it is to be understood that the material has been brought into its final shape by a shaping element, for example a casting mold. Suitable forming processes are, for example, extrusion molding and deep drawing. The material to be molded is heated at least to the specified temperature to allow shaping. For metals, this is a temperature in the range, usually slightly below, the melting temperature. However, with metals, a temperature above the melting point is required when a casting method is provided as the forming method. The inventive method can also be used for forming plastics. In plastics, one often does not speak of the melting or crystallization temperature, but of the so-called frost line, which denotes a temperature above which the plastic is malleable. All materials mentioned are common, at least, with which process they are formed must be heated to 100 degrees Celsius.

Weitere Ausführungsbeispiele der Erfindung gehen aus der gegenständlichen Beschreibung und den Ansprüchen hervor. Die einzelnen Figuren zeigen:

Fig. 1
Schnitt durch eine erfindungsgemäße Gebläseeinheit in der Seitenansicht.
Fig. 2
Ansicht gemäß II-II in Fig. 1
Fig. 3
Ansicht gemäß III-III in Fig. 1
Fig. 4
Perspektivische Ansicht einer erfindungsgemäßen Gebläseeinheit.
Further embodiments of the invention will become apparent from the description and the claims. The individual figures show:
Fig. 1
Section through a blower unit according to the invention in side view.
Fig. 2
View according to II-II in Fig. 1
Fig. 3
View according to III-III in Fig. 1
Fig. 4
Perspective view of a blower unit according to the invention.

Fig. 1 zeigt eine Gebläseeinheit 1. Dieser Gebläseeinheit 1 wird ein gasförmiges Medium, vorzugsweise erwärmte Luft, in Transportrichtung z über den Anschlussstutzen 2 zugeführt. Dieses gasförmige Medium tritt anschließend in Richtung y durch die Öffnungen 3 wieder aus der Gebläseeinheit 1 aus. Die Gebläseeinheit 1 besteht im wesentlichen aus vier Bauteilen. Im einzelnen sind dies der Hohlkörper 4, der Anschlussstutzen 2, der Abschlussdeckel 5 und die Loch- oder Düsenleiste 6. In fester Verbindung mit dem Anschlussstutzen 2 steht ein Strömungsleitelement 7. Der Anschlussstutzen 2 und das Strömungsleitelement 7 können als ein Bauteil, vorteilhafterweise als Kunststoffformteil, ausgeführt sein. Das Strömungsleitelement 7 lenkt einen Teil des durch den Anschlussstutzen in die Gebläseeinheit einströmenden Mediums um, so dass auch die in Transportrichtung z direkt hinter dem Anschlussstutzen liegenden Öffnungen 3 mit dem strömenden Medium beaufschlagt werden. Ohne das Strömungsleitelement würde ein zu geringer Anteil des Mediums durch die ersten Öffnungen 3 austreten. Im Endeffekt würde die auf den Bedruckstoff aufgebrachte Farbe ungleichmäßig trocknen.
Der Abschlussdeckel 5 kann als ein einzelnes Formteil ausgebildet sein. In der dargestellten Ausführungsform besteht der Abschlussdeckel 5 allerdings aus zwei Formteilen, wobei das Formteil 8 von innen am Abschlussdeckel 5 angebracht ist. Das Formteil 8 weist einen Zapfen 9 auf, der durch eine Bohrung in dem Abschlussdeckel 5 nach außen reicht. Der Zapfen 9 ist zylinderförmig ausgeformt. Der Zapfen 9 dient zur Lagerung der gesamten Gebläseeinheit 1 auf einer Unterlage, beispielsweise in dem Maschinengestell. Fig. 1 shows a blower unit 1. This blower unit 1 is a gaseous medium, preferably heated air, supplied in the transport direction z via the connecting piece 2. This gaseous medium then exits the blower unit 1 in the direction y through the openings 3. The blower unit 1 consists essentially of four components. In detail, these are the hollow body 4, the connecting piece 2, the end cover 5 and the hole or nozzle bar 6. In fixed connection with the connecting piece 2 is a flow guide 7. The connecting piece 2 and the flow guide 7 can be used as a component, advantageously as a plastic molding be executed. The flow guide element 7 deflects a part of the medium flowing through the connection piece into the blower unit so that the openings 3, which are located directly behind the connection piece in the transport direction z, are also exposed to the flowing medium. Without the flow-guiding element, too little a proportion of the medium would escape through the first openings 3. In the end, the paint applied to the substrate would dry unevenly.
The end cover 5 may be formed as a single molded part. In the illustrated embodiment, however, the end cover 5 consists of two molded parts, wherein the molded part 8 is attached from the inside to the end cover 5. The molded part 8 has a pin 9 which extends through a hole in the end cover 5 to the outside. The pin 9 is cylindrical. The pin 9 serves to support the entire blower unit 1 on a base, for example in the machine frame.

Zapfen 9 und der Anschlussstutzen 2 sind vorteilhafterweise so angeordnet, dass ihre Achsen fluchten. Das zweite, mit dem Anschlussstutzen 2 versehene Ende der Gebläseeinheit 1 wird von einem an den Anschlussstutzen 2 anzuschließende Rohrstück getragen. Insgesamt kann die Gebläseeinheit aufgrund dieser Art der Lagerung gedreht werden, so dass die Öffnungen 3 zwecks Reinigung auf einfache Weise zugänglich gemacht werden können.Pin 9 and the connecting piece 2 are advantageously arranged so that their axes are aligned. The second, provided with the connecting piece 2 end of the blower unit 1 is supported by a to be connected to the connecting piece 2 piece of pipe. Overall, the fan unit can be rotated due to this type of storage, so that the openings 3 can be made easily accessible for cleaning.

Die Figur 2 zeigt den Schnitt II - II gemäß Figur 1. In dieser Figur ist mit 10 ein Teil der Oberfläche des Hohlkörpers 4 bezeichnet. Dieser Teil 10 weist an seinen Randbereichen nur eine sehr geringe Materialstärke auf, so dass der Teil der Oberfläche 10 herausgebrochen werden kann. Erst danach wird bei der Herstellung der Gebläseeinheit 1 die Düsenleiste 6 mit dem Hohlkörper 4 verbunden. Zu diesem Zweck weist der Hohlkörper 4 Nuten oder Führungen 11 auf. Die Düsenleiste 6 weist an ihren Randbereichen 12 komplementäre Profile auf. Zur Montage braucht daher die Düsenleiste 6 nur von einer Stirnseite aus in die Nuten oder Führungen 11 des Hohlkörpers 4 eingeschoben zu werden.The FIG. 2 shows the section II - II according to FIG. 1 , In this figure, 10 denotes a part of the surface of the hollow body 4. This part 10 has at its edge regions only a very small material thickness, so that the part of the surface 10 can be broken out. Only then, in the production of the blower unit 1, the nozzle bar 6 is connected to the hollow body 4. For this purpose, the hollow body 4 grooves or guides 11. The nozzle bar 6 has at its edge regions 12 complementary profiles. For assembly, therefore, the nozzle bar 6 only needs to be inserted from one end face into the grooves or guides 11 of the hollow body 4.

Die Figur 3 zeigt die Sicht auf eine Stirnseite der Gebläseeinheit 1 gemäß Schnitt III - III in Figur 1. Diese Stirnseite ist mit dem Abschlussdeckel 5 verschlossen. Dieser Abschlussdeckel ist mit Schrauben 13 an dem Hohlkörper 4 fixiert. Zu erkennen ist weiterhin der Zapfen 9.The FIG. 3 shows the view of an end face of the blower unit 1 according to section III - III in FIG. 1 , This end face is closed with the end cover 5. This end cover is fixed with screws 13 on the hollow body 4. To recognize is still the pin 9th

Die Figur 4 zeigt eine perspektivische Ansicht der Gebläseeinheit 1, bestehend aus dem Hohlkörper 4, dem Anschlussstutzen 2 und der Düsenleiste 6. Bezugszeichenliste 1 Gebläseeinheit 2 Anschlussstutzen 3 Öffnungen 4 Hohlkörper 5 Abschlussdeckel 6 Düsenleiste 7 Strömungsleitelement 8 Formteil 9 Zapfen 10 Teil der Oberfläche 11 Nut 12 Randbereich der Düsenleiste 13 Schraube 14 15 16 17 18 19 20 21 22 23 24 x y Strömungsrichtung der Luft beim Austritt durch die Öffnungen z Transportrichtung der Luft in dem Luftkanal The FIG. 4 shows a perspective view of the blower unit 1, consisting of the hollow body 4, the connecting piece 2 and the nozzle bar. 6 LIST OF REFERENCE NUMBERS 1 blower unit 2 spigot 3 openings 4 hollow body 5 End cover 6 nozzle bar 7 flow guide 8th molding 9 spigot 10 Part of the surface 11 groove 12 Edge area of the nozzle bar 13 screw 14 15 16 17 18 19 20 21 22 23 24 x y Flow direction of the air as it exits through the openings z Transport direction of the air in the air duct

Claims (12)

  1. Fan unit (1) in a printing machine for drying of a print substrate which is provided with printing ink comprising of the following characteristics:
    - an air duct which is provided across (z) the transport direction (x) of the print substrate,
    - at least one opening (3) through which a gaseous medium can be conducted from the air duct in direction (y) to the print substrate and
    - a supply opening (2) through which the gaseous medium can be discharged into the air duct,
    - whereas the fan unit comprises of extrusion moulded, deep-drawn and cast material,
    characterized in that
    inside the air duct a flow conduction element is arranged in flow direction of the gaseous medium immediately behind the connecting sleeve.
  2. Fan unit according to claim 1,
    characterized in that
    the extrusion moulded, deep-drawn or cast material does at least partly comprise of the air duct.
  3. Fan unit according to one of the preceding claims,
    characterized in that
    the extrusion moulded, deep-drawn or cast material comprises the air duct together with at least one perforated strip containing at least one part of the openings.
  4. Fan unit according to the preceding claim,
    characterized in that
    the extrusion moulded, deep-drawn or cast material comprises the air duct except of the openings completely.
  5. Fan unit according to claim 1,
    characterized in that
    the material is extrusion moulded aluminium.
  6. Fan unit according to the preceding claims 3 to 5,
    characterized in that
    the perforated strip does at least partly consist of plastic.
  7. Fan unit according to one of the preceding claims,
    characterized in that
    the supply openings can be connected to the connecting nozzle (2) which is executed as a separate component.
  8. Fan unit according to one of the preceding claims,
    characterized in that
    the connecting nozzle (2) comprises a resin moulded part.
  9. Fan unit according to one of the preceding claims,
    characterized in that
    the connecting nozzle and the flow conduction element are formed integrally.
  10. Fan unit according to one of the preceding claims,
    characterized in that
    a cover plate comprising at least one resin moulded part.
  11. Process to manufacture a fan unit (1) in a printing machine for drying of a print substrate which is provided with printing ink comprising of the following characteristics:
    - an air duct which is provided across (z) the transport direction (x) of the print substrate,
    - at least one opening (3) through which a gaseous medium can be conducted from the air duct in direction (y) to the print substrate and
    - a supply opening (2) through which the gaseous medium can be discharged into the air duct,
    - whereas material is used for the manufacture of the fan unit the final shape of which has been defined in a deforming process at a temperature of at least 100 °C,
    characterized in that
    inside the air duct a flow conduction element is arranged in flow direction of the gaseous medium immediately behind the connecting sleeve.
  12. Process according to the preceding claim,
    characterized in that
    the air duct of the fan unit is partly created by a deep-drawing process.
EP05796360A 2004-10-25 2005-10-12 Fan unit in a drier for a printer Active EP1807264B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004051990A DE102004051990B4 (en) 2004-10-25 2004-10-25 Blower unit in a dryer for a printing machine
PCT/EP2005/011013 WO2006045442A1 (en) 2004-10-25 2005-10-12 Fan unit in a drier for a printer

Publications (2)

Publication Number Publication Date
EP1807264A1 EP1807264A1 (en) 2007-07-18
EP1807264B1 true EP1807264B1 (en) 2008-04-02

Family

ID=35614715

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05796360A Active EP1807264B1 (en) 2004-10-25 2005-10-12 Fan unit in a drier for a printer

Country Status (5)

Country Link
EP (1) EP1807264B1 (en)
AT (1) ATE391017T1 (en)
DE (2) DE102004051990B4 (en)
ES (1) ES2302238T3 (en)
WO (1) WO2006045442A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017122806A1 (en) * 2017-09-29 2019-04-04 Windmöller & Hölscher Kg Apparatus for drying an inked substrate

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4406846C1 (en) * 1994-03-03 1995-05-04 Koenig & Bauer Ag Device for drying printed sheets or webs in printing machines
DE4442940A1 (en) * 1994-12-02 1996-06-05 Hans Georg Dipl Ing Platsch Air blowing strip for printer
DE19701084A1 (en) * 1997-01-15 1998-07-16 Hans Georg Platsch Drying system for printed flat sheets
DE29714455U1 (en) * 1997-08-13 1997-10-09 Roland Man Druckmasch Drying device for substrates in a processing machine
DE29910122U1 (en) * 1999-06-10 1999-09-23 Platsch Hans G Dryer unit
DE10136396A1 (en) * 2001-07-26 2003-02-13 Platsch Gmbh & Co Kg Dryers for printed matter

Also Published As

Publication number Publication date
EP1807264A1 (en) 2007-07-18
ATE391017T1 (en) 2008-04-15
DE102004051990A1 (en) 2006-05-04
ES2302238T3 (en) 2008-07-01
DE102004051990B4 (en) 2009-01-02
DE502005003590D1 (en) 2008-05-15
WO2006045442A1 (en) 2006-05-04

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