EP1834147B1 - Thermal irradiation system for heating material to be irradiated - Google Patents
Thermal irradiation system for heating material to be irradiated Download PDFInfo
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- EP1834147B1 EP1834147B1 EP05820615A EP05820615A EP1834147B1 EP 1834147 B1 EP1834147 B1 EP 1834147B1 EP 05820615 A EP05820615 A EP 05820615A EP 05820615 A EP05820615 A EP 05820615A EP 1834147 B1 EP1834147 B1 EP 1834147B1
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- radiation
- orifice element
- wall
- radiation arrangement
- arrangement
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Images
Classifications
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- 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
- F26B3/30—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun from infrared-emitting elements
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- 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
Definitions
- the invention relates to a thermal irradiation arrangement for heating an irradiation material, having at least one high-power radiation source for radiation having a substantial active component in the visible and / or IR and / or UV region, in particular in the region of the near infrared, and at least one with the radiation acted upon wall.
- irradiation methods are often used in which the irradiation with electromagnetic radiation having a significant active content in the near infrared (NIR), in particular in the wavelength range between 0.8 .mu.m and 1.5 microns, applied and so heated.
- NIR near infrared
- UV or visible radiation is also absorbed by many materials and causes corresponding thermal effects.
- the material to be irradiated has volatiles, such as solvents in paints or inks.
- volatiles such as solvents in paints or inks.
- larger quantities of these high-boiling constituents evaporate from the heated irradiation material. These then settle on the cooler parts of the arrangement, in particular on the cooled wall or on the reflectors. There they run along the walls and / or form incrustations.
- contamination affects the functionality of the system, for example.
- the reflectivity of the wall and also endanger the quality of the products when adhering to the wall from the wall dripping condensates or chipping deposits on the irradiation. They are also flammable and possibly generate the risk of explosion.
- cleaning and polishing work are required, which are time consuming and labor-intensive and require a longer downtime and corresponding costs.
- US 618 353 discloses an infrared oven having a heating chamber whose walls are provided with openings through which infrared lamps can be directed into the heating chamber.
- the oven walls are made up of several units, allowing the infrared oven to be quickly and easily assembled from several standard elements.
- US 1,115,794 discloses a drying arrangement, which consists of two chambers, wherein in one chamber reflectors are arranged and in the second chamber is cooled air. Both chambers are separated by a wall which contains slots through which the cooled air can pass to bypass the reflectors, thus extending the life of the reflectors and reducing the pollution of the reflectors.
- US 2,688,684 discloses an infrared-type drying oven whose interior is lined with plates having a reflective surface and lined in polished stainless steel, aluminum, chromium or cadmium or with enamel, all of which have good radiation-reflecting properties.
- US 618 978 discloses a device which generates heat with infrared. The device is thereby assembled from different standardized parts and can thus assume different sizes.
- US 5,542,194 discloses a silicon carbide body which also radiates infrared radiation and a corresponding device having this body and used for drying.
- DD 8211 discloses a radiation oven for drying a dry material, the irradiation of the dry material is carried out indirectly by the rays of the infrared lamp or the dark radiator are irradiated on an aluminum foil, which in turn reflects the radiation back to the dry matter by reflection.
- US 2 419 643 also discloses a furnace structure consisting essentially of standardized elements so that the assembly can be easily adapted to the given needs.
- US 6,621,087 discloses a UV radiator which is used to dry UV-curable ink.
- EP 0 133 847 discloses a reflector structure that can be placed behind infrared radiation sources, where the reflector surface is made of a ceramic fibrous material.
- DE 8 34 970 discloses a radiation dryer with a tunnel-shaped dry dream and electrically heated tubular heaters. Damaged radiators can be easily replaced by openings on the furnace wall.
- DE 27 26 387 discloses a UV light assembly having dichroic filters that evaluate a coating on a substrate using an ellipse-like reflector housing.
- US Pat. No. 6,242,717 discloses a removable support to which a reflector can be mounted in an oven.
- GB 1 489 183 discloses a reflector system having a housing in which a radiator and a reflector are arranged.
- a control system determines the exit temperature of the cooling liquid previously flowed through the enclosure and thus controls the flow of liquid through the device to maintain the temperature of the radiator at an optimum value.
- FR 1 105 713 discloses a drying oven which can be assembled from prefabricated elements.
- US 2,559,249 discloses an improved furnace structure wherein parts of the furnace structure are standardized so that the parts can be individually selected and bonded together to obtain a furnace having the desired size, capacity and shape.
- the invention is therefore based on the object of specifying an irradiation arrangement of the generic type, which avoids the impairment of the functioning of the arrangement and the quality of the products produced by evaporating constituents of an irradiation material which condense on the wall in a simple and cost-effective manner.
- the invention includes the essential idea to provide a Vorblendelement, which is mounted on the wall at a distance.
- the Vorblendelement has an acted upon by the radiation reflective front side and the wall facing radiating rear side.
- the reflection and radiation properties of the Vorblendenses are set such that sets a temperature above the temperature of the wall during operation of the irradiation arrangement. This temperature is determined by the thermal equilibrium which results from the absorption of the radiation emitted by the radiation source on the front side and the radiation in the direction of the cooled system parts.
- the temperature of the Vorblendenses can thus be adjusted in operation so that a condensation of evaporated volatile compounds from the irradiation and thus the formation of encrustations and / or impairing the reflectivity of the elements soiling is prevented or at least limited. If necessary, the influence (convection) of heated process air must also be considered.
- the front side of the Vorblendimplantations is highly reflective. This is advantageous for the radiation space limiting areas, in which high reflectivity is desired, for example. Due to particularly intense exposure to the radiation.
- the front side of the Vorblendenses is diffusely reflective. This is advantageous for areas of lower radiation exposure, for example, at the inlet or outlet of a drying plant with conveyor.
- the rear side of the Vorblendenses is blackened. As a result, the radiation and thus the heat dissipation to the cooled system parts is designed particularly efficient.
- the Vorblendelement is interchangeable attached. This makes it particularly easy to clean dirty areas of the irradiation arrangement.
- the Vorblendelement is attached by means of a snap connection or clamp connection.
- the Vorblendelement comprises a plurality of modules, which are each mounted individually. Thus, only those modules need to be replaced, which are actually dirty.
- the Vorblendelement via a fastening device, designed as a light support structure with wire sections, in particular of spring wire, attached to the wall, wherein the Vorblendelement is profiled for attachment to wire sections.
- a fastening device designed as a light support structure with wire sections, in particular of spring wire, attached to the wall, wherein the Vorblendelement is profiled for attachment to wire sections.
- a fastening device is only a small heat conduction to the actively cooled system parts out.
- the Vorblendelement aluminum sheet or one or both sides enameled or coated with ceramic steel sheet can be polished on the front side and / or anodized on the back side.
- Such Vorblendieri are chemically and mechanically resistant, heat resistant and according to findings of the inventors for the requirements in the operation of inventive irradiation arrangements generally suitable.
- the Vorblendelement on a metal foil This is inexpensive and can be easily attached or replaced, but is not as strong and stable as massive modules.
- Fig. 1 shows a section of a wall 11 of an irradiation arrangement 10 according to the invention, to which via a fastening device 12 a (here partially cut shown) module 14-1 of a Vorblendimplantations 16 is attached. Another module 14-2 of the Vorblendimplantations 16 is attached via a further fastening device, not shown, on the wall 11.
- the wall 11 is designed as a solid support structure for the process or radiation space.
- Channels 18 are used to pass cooling fluid, such as water, air or a thermal oil.
- the simplest and therefore most cost-effective solution is water cooling with water at low pressure. Should the temperature of the wall 11 are in operation of the system above 100 ° C, however, the cooling by water at high pressure, air or oil is also possible.
- the fastening device 12 is designed as a quick-release holder made of spring wire.
- the wire forms two fixed at a central point frame or legs 20, 22.
- the connection with the wall is realized as a rivet connection 24.
- the module 14-1 is clamped onto the spring wire frames 20, 22 of the fastening device 12. It has to advantageous on one side of a receiving portion 26 for the spring wire, so that the module 14-1 can be mounted when mounted in the frame 20, 22. By manual pressure, the attachment of the module 14-1 then takes place on the wall 11. The distance between the back of the module 14-1 and the surface of the wall 11 is approximately 2 to 5 millimeters.
- the clamped module 14-1 can either be removed without tools or with a simple tool (eg a screwdriver) with little expenditure of time.
- the receiving area 26 is formed by a suitable profiling of the module 14-1 during its manufacture. However, a clamping of the modules is possible even without such a receiving area. Likewise, other profiles are conceivable, for example, lead to a postponement or snapping the modules on the fasteners.
- a section of a wall 11 'of an irradiation arrangement 10' is shown.
- the wall 11 ' consists of aluminum extruded profiles and is provided with active water cooling. For this purpose, not visible cooling water channels are pressed into the profile. A connection 27 of a cooling water channel is indicated. Openings 28 allow the joining of the wall 11 'with other, not shown portions of the assembly 10'.
- a Vorblendelement 16 ' is composed of individual modules, of which the modules 14-3 - 14-5 are indicated. Another module has been removed, so that the module facing surface 29 of the wall 11 'can be seen.
- the surface 29 is blackened (indicated by hatching) and is thus suitable for the efficient absorption and removal of the heat radiation emitted by the rear side of the Vorblendelements 16 '.
- the fastening device 12 Unlike in the Fig. 1 As shown, the fastening device 12 'here consists of four frame sections 20' of spring wire for attachment of each module. In each case two of the frame portions 20 'are mounted on the wall 11' via a double rivet connection 24 '.
- the shape of the modules can be rectangular or square. Other shapes are also conceivable, with the shape of the modules resulting, inter alia, from the geometry of the radiation space and the desired handling of the modules for each specific application. Differently shaped modules can be combined to form a Vorblendelement.
- FIG. 3 A third exemplary embodiment of an irradiation arrangement 10 "according to the invention is shown, wall sections 11" forming an entrance of a radiation tunnel 30.
- the wall 11 is in turn actively cooled, with a connection 27 'serving to supply and discharge cooling water.
- the wall sections 11 "of the radiation space 30 are lined with a modularly constructed Vorblendelement 16". Exempted is a bridge or an irradiation area 32, which in the operation of the tunnel 30 by a not formed quartz glass, below which a plurality of NIR emitters 34 which radiate NIR radiation into the tunnel 30.
- irradiation material is passed through the radiation tunnel 30 by means of a conveyor belt, not shown.
- some of the modules of the Vorblendimplantations 16 " for example, the modules 14-6, 14-7, each provided with a shock protection 36. This is advantageous instead of attached to the wall on the modules, for example by Screw in to allow quick and easy replacement of these modules as well.
- the modules of the Vorblendiatas 16 may differ in the reflection properties of their front pages, so that the modules assume the desired (high) temperatures during operation.
- the modules 14-8, 14-9 in Fig. 3 are made of highly reflective aluminum sheet, the intense radiation exposure at the location of the modules 14-8, 14-9 is taken into account, while the modules 14-6, 14-7 of diffuse reflective material, such as enameled steel sheet, to the lower radiation exposure in place modules 14-6, 14-7.
- the reflectivity and the radiation capacity of the back of the Vorblendelements can be used by blackening to adjust the temperature.
- Be fastening devices such as those in the FIGS. 1 and 2 shown, used wire-shaped mounts, the heat conduction through the fastening device with regard to the thermal equilibrium of the Vorblendelements can be neglected (however, a low heat dissipation by convection is always done in addition to the heat radiation).
- the solvents are not or only to a small extent precipitated on the pre-glazing elements lining the wall, but instead remain in gaseous form inside the radiation room and can be extracted by a ventilation system.
- a ventilation system Compared to known systems so that the pollution of the reflective system components is substantially reduced. Cleaning work falls in a correspondingly smaller extent.
- An irradiation arrangement according to the invention is advantageously usable, for example, in drying installations for drying and / or curing paints.
- a paint coating applied to a substrate is exposed to radiation in the infrared range and / or in the UV range.
- the reflectivity of the Vorblendenses of the invention can be adapted to the specific wavelength ranges used, so that the element in the operation of the. Plant assumes a temperature above the boiling point of solvents evaporating from the paint.
- An irradiation arrangement according to the invention can furthermore advantageously be used in radiation drying installations for drying paints, printing inks, glazes, oils or the like into substances to be permanently introduced into a substrate.
- the substrate is exposed to radiation which penetrates into the substrate to a certain depth. This causes a drying or hardening of the introduced substances, whereby solvents can be released from the color and / or constituents of the substrate itself.
- a lining of the radiation space of such a system with the Vorblendelement invention also leads to a significantly reduced pollution and thus lesser standstill.
- a thermal irradiation arrangement according to the invention can furthermore advantageously be used as a heating section or as part of such in a system for stretch blow molding, for example for the production of PET containers from preforms or preforms.
- the preforms are heated in a short period of time to a drawing temperature of about 110 ° C and fed in the heated state of a stretch blow mold in which the final shape of the container is formed under the supply of compressed air.
- infrared radiators are often used.
- Counter and side reflectors are used to generate an optimum for the heating of the preform radiation field. If the reflectors are not formed by the wall itself, but by pre-blend elements according to the invention, the advantages described above with respect to drying systems also arise here.
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- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Mechanical Engineering (AREA)
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Drying Of Solid Materials (AREA)
Description
Die Erfindung betrifft eine thermische Bestrahlungsanordnung zur Erwärmung eines Bestrahlungsgutes, mit mindestens einer Hochleistungs-Strahlungsquelle für Strahlung mit einem wesentlichen Wirkanteil im sichtbaren und/oder IR- und/oder UV-Bereich, insbesondere im Bereich des nahen Infrarot, und mindestens einer mit der Strahlung beaufschlagten Wandung.The invention relates to a thermal irradiation arrangement for heating an irradiation material, having at least one high-power radiation source for radiation having a substantial active component in the visible and / or IR and / or UV region, in particular in the region of the near infrared, and at least one with the radiation acted upon wall.
Zur thermischen Behandlung von Oberflächen, Bearbeitung von Materialien und Herstellung von Verbundwerkstoffen werden im industriellen Umfeld vielfach Bestrahlungsverfahren angewendet, bei denen das Bestrahlungsgut mit elektromagnetischer Strahlung mit einem wesentlichen Wirkanteil im Bereich des nahen Infrarot (NIR), insbesondere im Wellenlängenbereich zwischen 0,8 µm und 1,5 µm, beaufschlagt und so erwärmt wird. Strahlung im UV- oder sichtbaren Bereich wird jedoch von vielen Materialien ebenfalls absorbiert und ruft entsprechende thermische Wirkungen hervor.For thermal treatment of surfaces, processing of materials and production of composite materials in the industrial environment irradiation methods are often used in which the irradiation with electromagnetic radiation having a significant active content in the near infrared (NIR), in particular in the wavelength range between 0.8 .mu.m and 1.5 microns, applied and so heated. However, UV or visible radiation is also absorbed by many materials and causes corresponding thermal effects.
Bekannt ist bspw. der Einsatz von Bestrahlungsanordnungen zum Trocknen von Lacken, etwa Flüssig- oder auch Pulverlacken, auf Metall, Holz, Papier oder Kunststoffen, vgl. die Patentschriften
Bei der Realisierung von Applikationen von im nahen Infrarot arbeitenden Bestrahlungsanordnungen werden vielfach Gegenreflektoren auf der der Strahlungsquelle abgewandten Seite des Bearbeitungsgegenstandes und/oder Seitenreflektoren, ggfs. zur Ausbildung eines im wesentlichen geschlossenen Strahlungsraumes, vorgesehen. Dies gilt insbesondere für Applikationen zur Bestrahlung eines schnell geförderten Bearbeitungsgegenstandes, wie einer Papierbahn, einer Kunststofffolie, eines Metallbandes, eines Elastomerprofiles oder von Preforms o. ä. Hierdurch ergeben sich wesentliche Verbesserungen beim behandelten Produkt und in der Prozessführung. Die Reflektoren bilden Wandungen der Bestrahlungszone bzw. des Strahlungsraumes. Entsprechende Anordnungen sind bspw. den Patenten
Im Betrieb, insbesondere bei Anwendung hoher Strahlungsflussdichten (von 200 kW/m2 und mehr) erweist sich eine aktive Kühlung der Gegenreflektoren und vielfach auch von Seitenreflektoren als wesentlich, um die durch die Emitter eingetragene Wärme aus dem Strahlungsraum abzuführen. Trotz hohen Reflexionsgrades nehmen die Reflektoren nämlich soviel Strahlungsenergie in Form von Wärme auf, dass ihre Formtreue bei längerem Einsatz ohne aktive Kühlung nicht ohne weiteres gewährleistet ist.In operation, in particular when using high radiation flux densities (of 200 kW / m 2 and more), active cooling of the counter-reflectors and often also of side reflectors proves to be essential to dissipate the heat introduced by the emitters from the radiation space. In spite of the high degree of reflectivity, the reflectors absorb so much radiant energy in the form of heat that their dimensional stability is not readily guaranteed during prolonged use without active cooling.
Sehr häufig weist das Bestrahlungsgut flüchtige Bestandteile auf, wie etwa Lösungsmittel in Lacken oder Farben. Bei vielen Applikationen dampfen aus dem erwärmten Bestrahlungsgut größere Mengen dieser hochsiedenden Bestandteile ab. Diese setzen sich sodann an den kühleren Teilen der Anordnung ab, insbesondere an der gekühlten Wandung bzw. an den Reflektoren. Dort laufen sie an den Wänden entlang und/oder bilden Verkrustungen. Derartige Verschmutzungen beeinträchtigen die Funktionsfähigkeit der Anlage, bspw. die Reflexionsfähigkeit der Wandung, und gefährden auch die Qualität der Produkte, wenn von der Wandung heruntertropfende Kondensate oder abplatzende Ablagerungen auf dem Bestrahlungsgut anhaften. Sie sind zudem feuergefährlich und erzeugen ggfs. Explosionsgefahr. Somit werden Reinigungs- und Polierarbeiten erforderlich, die zeit- und personalaufwendig sind und einen längeren Anlagenstillstand und entsprechende Kosten bedingen.Very often, the material to be irradiated has volatiles, such as solvents in paints or inks. In many applications, larger quantities of these high-boiling constituents evaporate from the heated irradiation material. These then settle on the cooler parts of the arrangement, in particular on the cooled wall or on the reflectors. There they run along the walls and / or form incrustations. Such contamination affects the functionality of the system, for example. The reflectivity of the wall, and also endanger the quality of the products when adhering to the wall from the wall dripping condensates or chipping deposits on the irradiation. They are also flammable and possibly generate the risk of explosion. Thus, cleaning and polishing work are required, which are time consuming and labor-intensive and require a longer downtime and corresponding costs.
DD 8211 offenbart einen Strahlungsofen zur Trocknung eines Trockengutes, wobei die Bestrahlung des Trockengutes indirekt erfolgt, indem die Strahlen der Infrarot-Lampe oder des Dunkelstrahlers auf eine Alufolie aufgestrahlt werden, die wiederum durch Reflexion die Strahlung auf das Trockengut zurückwirft.DD 8211 discloses a radiation oven for drying a dry material, the irradiation of the dry material is carried out indirectly by the rays of the infrared lamp or the dark radiator are irradiated on an aluminum foil, which in turn reflects the radiation back to the dry matter by reflection.
Der Erfindung liegt daher die Aufgabe zugrunde, eine Bestrahlungsanordnung der gattungsgemäßen Art anzugeben, welche die Beeinträchtigung der Funktionsfähigkeit der Anordnung sowie der Qualität der erzeugten Produkte durch abdampfende Bestandteile eines Bestrahlungsgutes, die an der Wandung kondensieren, auf einfache und kostengünstige Weise vermeidet.The invention is therefore based on the object of specifying an irradiation arrangement of the generic type, which avoids the impairment of the functioning of the arrangement and the quality of the products produced by evaporating constituents of an irradiation material which condense on the wall in a simple and cost-effective manner.
Diese Aufgabe wird durch eine Bestrahlungsanordnung mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved by an irradiation arrangement having the features of claim 1.
Die Erfindung schließt den wesentlichen Gedanken ein, ein Vorblendelement vorzusehen, weiches auf der Wandung mit Abstand angebracht ist. Das Vorblendelement weist eine von der Strahlung beaufschlagte reflektierende Vorderseite und eine der Wandung zugewandte abstrahlende Rückseite auf.The invention includes the essential idea to provide a Vorblendelement, which is mounted on the wall at a distance. The Vorblendelement has an acted upon by the radiation reflective front side and the wall facing radiating rear side.
Speziell sind die Reflexions- und Abstrahleigenschaften des Vorblendelementes derart festgelegt, dass sich im Betrieb der Bestrahlungsanordnung eine Temperatur oberhalb der Temperatur der Wandung einstellt. Diese Temperatur bestimmt sich aus dem thermischen Gleichgewicht, das sich durch die Absorption der von der Strahlungsquelle emittierten Strahlung auf der Vorderseite und die Abstrahlung in Richtung auf die gekühlten Anlagenteile einstellt. Die Temperatur des Vorblendelementes kann somit im Betrieb so eingestellt werden, dass eine Kondensation abgedampfter flüchtiger Verbindungen aus dem Bestrahlungsgut und somit die Bildung von Verkrustungen und/oder von die Reflexionsfähigkeit der Elemente beeinträchtigenden Verschmutzungen verhindert oder zumindest eingeschränkt wird. Dabei ist ggfs. auch der Einfluss (Konvektion) von erwärmter Prozessluft zu berücksichtigen.Specifically, the reflection and radiation properties of the Vorblendelementes are set such that sets a temperature above the temperature of the wall during operation of the irradiation arrangement. This temperature is determined by the thermal equilibrium which results from the absorption of the radiation emitted by the radiation source on the front side and the radiation in the direction of the cooled system parts. The temperature of the Vorblendelementes can thus be adjusted in operation so that a condensation of evaporated volatile compounds from the irradiation and thus the formation of encrustations and / or impairing the reflectivity of the elements soiling is prevented or at least limited. If necessary, the influence (convection) of heated process air must also be considered.
In einer bevorzugten Ausführungsform einer erfindungsgemäßen Bestrahlungsanordnung ist die Vorderseite des Vorblendelementes hochreflektierend. Dies ist für den Strahlungsraum begrenzende Bereiche vorteilhaft, bei der hohe Reflektivität erwünscht ist, bspw. aufgrund besonders intensiver Beaufschlagung mit der Strahlung.In a preferred embodiment of an irradiation arrangement according to the invention, the front side of the Vorblendelementes is highly reflective. This is advantageous for the radiation space limiting areas, in which high reflectivity is desired, for example. Due to particularly intense exposure to the radiation.
Bei einer weiteren bevorzugten Ausführungsform ist die Vorderseite des Vorblendelementes diffus reflektierend. Dies ist für Bereiche geringerer Strahlenbelastung vorteilhaft, bspw. am Ein- bzw. Auslauf einer Trocknungsanlage mit Fördereinrichtung. In weiteren Ausführungsformen der erfindungsgemäßen Bestrahlungsanordnung ist die Rückseite des Vorblendelementes geschwärzt. Hierdurch wird die Abstrahlung und damit die Wärmeabfuhr auf die gekühlten Anlagenteile besonders effizient gestaltet.In a further preferred embodiment, the front side of the Vorblendelementes is diffusely reflective. This is advantageous for areas of lower radiation exposure, for example, at the inlet or outlet of a drying plant with conveyor. In further embodiments of the irradiation arrangement according to the invention, the rear side of the Vorblendelementes is blackened. As a result, the radiation and thus the heat dissipation to the cooled system parts is designed particularly efficient.
Nach der Erfindung, ist das Vorblendelement auswechselbar angebracht. Hierdurch gestaltet sich eine Reinigung verschmutzter Bereiche der Bestrahlungsanordnung besonders einfach. In bevorzugten Ausgestaltungen dieser Ausführungsformen ist das Vorblendelement mittels einer Schnappverbindung oder Klemmverbindung angebracht.According to the invention, the Vorblendelement is interchangeable attached. This makes it particularly easy to clean dirty areas of the irradiation arrangement. In preferred embodiments of these embodiments, the Vorblendelement is attached by means of a snap connection or clamp connection.
Bei weiterhin vorteilhaften Ausführungsformen umfasst das Vorblendelement eine Mehrzahl von Modulen, die jeweils einzeln angebracht sind. Somit brauchen nur diejenigen Module ausgewechselt werden, die tatsächlich verschmutzt sind.In further advantageous embodiments, the Vorblendelement comprises a plurality of modules, which are each mounted individually. Thus, only those modules need to be replaced, which are actually dirty.
Bevorzugt ist das Vorblendelement über eine Befestigungseinrichtung, ausgebildet als leichte Tragstruktur mit Draht-Abschnitten, insbesondere aus Federdraht, an der Wandung angebracht, wobei das Vorblendelement zur Befestigung an Draht-Abschnitten profiliert ist. Über eine derartige Befestigungseinrichtung erfolgt nur eine geringe Wärmeleitung zu den aktiv gekühlten Anlagenteilen hin. Somit kann die Festlegung der Betriebstemperatur des Vorblendelements auf einfache und vorhersehbare Weise über die Festlegung der Reflexions- und Abstrahleigenschaften erfolgen.Preferably, the Vorblendelement via a fastening device, designed as a light support structure with wire sections, in particular of spring wire, attached to the wall, wherein the Vorblendelement is profiled for attachment to wire sections. About such a fastening device is only a small heat conduction to the actively cooled system parts out. Thus, the determination of the operating temperature of the Vorblendelements can be done in a simple and predictable way on the determination of the reflection and Abstrahligenschaften.
In bevorzugten Ausführungsformen einer erfindungsgemäßen Bestrahlungsanordnung weist das Vorblendelement Aluminiumblech oder ein- oder beidseitig emailliertes oder mit Keramik beschichtetes Stahlblech auf. Vorteilhaft kann das Aluminiumblech vorderseitig poliert und/oder rückseitig anodisiert sein. Derartige Vorblendelemente sind chemisch und mechanisch widerstandsfähig, hitzebeständig und nach Erkenntnissen der Erfinder für die Anforderungen im Betrieb erfindungsgemäßer Bestrahlungsanordnungen allgemein geeignet.In preferred embodiments of an irradiation arrangement according to the invention, the Vorblendelement aluminum sheet or one or both sides enameled or coated with ceramic steel sheet. Advantageously, the aluminum sheet can be polished on the front side and / or anodized on the back side. Such Vorblendelemente are chemically and mechanically resistant, heat resistant and according to findings of the inventors for the requirements in the operation of inventive irradiation arrangements generally suitable.
Bei weiteren, besonders einfachen und kostengünstigen Ausführungsformen der Erfindung weist das Vorblendelement eine Metallfolie auf. Diese ist preisgünstig und kann auf einfache Weise angebracht bzw. ausgetauscht werden, ist allerdings nicht so belastbar und standfest wie etwa massive Module.In further, particularly simple and inexpensive embodiments of the invention, the Vorblendelement on a metal foil. This is inexpensive and can be easily attached or replaced, but is not as strong and stable as massive modules.
Weitere Vorteile und Zweckmäßigkeiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele anhand der Figuren. Von diesen zeigen:
- Fig. 1
- in schematischer Darstellung einen Wandungsausschnitt einer erfindungsgemäßen Bestrahlungsanordnung mit einer Befestigungseinrichtung und einem Vorblendelement;
- Fig. 2
- einen Ausschnitt einer Seitenwandung einer erfindungsgemäßen Bestrahlungsanordnung mit als Seitenreflektor ausgebildetem Vorblendelement;
- Fig. 3
- der Eingang eines Strahlungstunnels einer erfindungsgemäßen NIR-Bestrahlungsanordnung mit Strahlungsquelle und Vorblendelementen.
- Fig. 1
- a schematic representation of a wall section of an irradiation arrangement according to the invention with a fastening device and a Vorblendelement;
- Fig. 2
- a detail of a side wall of an irradiation arrangement according to the invention with trained as a side reflector Vorblendelement;
- Fig. 3
- the entrance of a radiation tunnel of an inventive NIR irradiation arrangement with radiation source and Vorblendelementen.
Die Wandung 11 ist als massive Tragstruktur für den Prozess- bzw. Strahlungsraum ausgeführt. Kanäle 18 dienen der Durchleitung von Kühlfluid, etwa Wasser, Luft oder einem Thermoöl. Die einfachste und damit kostengünstigste Lösung ist die Wasserkühlung mit Wasser bei geringem Druck. Soll die Temperatur der Wandung 11 im Betrieb der Anlage über 100° C liegen, ist jedoch die Kühlung durch Wasser bei hohem Druck, Luft oder Öl ebenso möglich.The
Die Befestigungseinrichtung 12 ist als Schnellspannhalterung aus Federdraht ausgeführt. Der Draht bildet zwei an zentraler Stelle fixierte Rahmen oder Schenkel 20, 22. Die Verbindung mit der Wandung ist als Nietverbindung 24 realisiert.The
Vielfältige Abweichungen von der in
Das Modul 14-1 wird auf die Federdraht-Rahmen 20, 22 der Befestigungseinrichtung 12 aufgeklemmt. Es hat dazu vorteilhaft auf einer seiner Seiten einen Aufnahmebereich 26 für den Federdraht, so dass das Modul 14-1 beim Anbringen in die Rahmen 20, 22 eingehängt werden kann. Durch manuellen Druck erfolgt sodann die Befestigung des Moduls 14-1 an der Wandung 11. Der Abstand zwischen der Rückseite des Moduls 14-1 und der Oberfläche der Wandung 11 beträgt ca. 2 - 5 Millimeter.The module 14-1 is clamped onto the spring wire frames 20, 22 of the
Das aufgeklemmte Modul 14-1 kann entweder werkzeuglos oder mit einem einfachen Werkzeug (bspw. einem Schraubendreher) mit geringem Zeitaufwand abgenommen werden.The clamped module 14-1 can either be removed without tools or with a simple tool (eg a screwdriver) with little expenditure of time.
Der Aufnahmebereich 26 wird durch eine geeignete Profilierung des Moduls 14-1 bei dessen Herstellung ausgebildet. Ein Aufklemmen der Module ist jedoch auch ohne einen derartigen Aufnahmebereich möglich. Ebenso sind auch andere Profilierungen denkbar, die bspw. zu einem Aufschieben oder einem Aufschnappen der Module auf die Befestigungseinrichtungen führen.The receiving
In
Ein Vorblendelement 16' ist aus einzelnen Modulen zusammengesetzt, von denen die Module 14-3 - 14-5 angedeutet sind. Ein weiteres Modul ist entfernt worden, so dass die den Modulen zugewandte Oberfläche 29 der Wandung 11' erkennbar ist. Die Oberfläche 29 ist geschwärzt (durch Schraffur angedeutet), und ist so zur effizienten Absorption und Abführung der von der Rückseite des Vorblendelements 16' abgegebenen Wärmestrahlung geeignet.A Vorblendelement 16 'is composed of individual modules, of which the modules 14-3 - 14-5 are indicated. Another module has been removed, so that the
Anders als in dem in
In
Die Wandungsabschnitte 11" des Strahlungsraumes 30 sind mit einem modulartig aufgebauten Vorblendelement 16" ausgekleidet. Ausgenommen ist eine Brücke bzw. ein Einstrahlungsbereich 32, der im Betrieb des Tunnels 30 durch eine nicht eingezeichnete Quarzglasscheibe gebildet wird, unter der eine Mehrzahl von NIR-Emittern 34 liegt, die NIR-Strahlung in den Tunnel 30 einstrahlen.The
Im Betrieb wird Bestrahlungsgut durch den Strahlungstunnel 30 mittels eines nicht eingezeichneten Förderbandes geführt. Um ein Berühren des Bandes zu vermeiden, sind einige der Module des Vorblendelementes 16", bspw. die Module 14-6, 14-7, jeweils mit einem Berührschutz 36 versehen. Dieser ist vorteilhaft statt an der Wandung an den Modulen angebracht, beispielsweise durch Verschrauben, um ein einfaches und schnelles Auswechseln auch dieser Module zu ermöglichen.In operation, irradiation material is passed through the
Die Module des Vorblendelementes 16" können sich in den Reflexionseigenschaften ihrer Vorderseiten unterscheiden, so dass die Module im Betrieb die gewünschten (hohen) Temperaturen annehmen. So können bspw. die Module 14-8, 14-9 in
Neben der Reflektivität kann auch das Abstrahlungsvermögen der Rückseite des Vorblendelements durch Einschwärzung zur Einstellung der Temperatur verwendet werden. Werden Befestigungseinrichtungen wie die in den
Im Betrieb der Anlage schlagen sich somit die Lösungsmittel nicht oder nur in geringem Maße auf den die Wandung auskleidenden Vorblendelementen nieder, sondern verbleiben in Gasform im Inneren des Strahlungsraums und können durch eine Belüftungsanlage abgesaugt werden. Gegenüber bekannten Anlagen ist damit die Verschmutzung der reflektierenden Anlagenteile wesentlich vermindert. Reinigungsarbeiten fallen in entsprechend geringerem Umfang an.During operation of the system, therefore, the solvents are not or only to a small extent precipitated on the pre-glazing elements lining the wall, but instead remain in gaseous form inside the radiation room and can be extracted by a ventilation system. Compared to known systems so that the pollution of the reflective system components is substantially reduced. Cleaning work falls in a correspondingly smaller extent.
Die Behandlung dennoch auftretender Verschmutzungen gestaltet sich darüber hinaus wesentlich einfacher, da die verschmutzten Module des Vorblendelementes nicht gereinigt und poliert, sondern lediglich ausgetauscht werden. Insgesamt verkürzen sich somit die Stillstandszeiten wesentlich. Entnommene Module können aber nach Art und Grad der Verschmutzung, ggf. auch außerhalb der Anlage gereinigt und später wiederverwendet werden.The treatment still occurring contamination designed beyond much easier, since the soiled modules of the Vorblendelementes not cleaned and polished, but only be replaced. Overall, therefore, the downtime shortened significantly. Removed modules can, however, be cleaned according to the type and degree of contamination, if necessary also outside the plant, and later reused.
Eine erfindungsgemäße Bestrahlungsanordnung ist vorteilhaft bspw. in Trocknungsanlagen zum Trocknen und/oder Härten von Lacken verwendbar. Hierbei wird eine auf ein Substrat aufgebrachte Lackbeschichtung mit Strahlung im Infrarotbereich und/oder im UV-Bereich beaufschlagt. Die Reflektivität des Vorblendelementes der Erfindung kann an die jeweils konkret verwendeten Wellenlängenbereiche angepasst werden, so dass das Element im Betrieb der. Anlage eine Temperatur oberhalb der Siedetemperatur von aus dem Lack verdampfenden Lösungsmitteln annimmt.An irradiation arrangement according to the invention is advantageously usable, for example, in drying installations for drying and / or curing paints. In this case, a paint coating applied to a substrate is exposed to radiation in the infrared range and / or in the UV range. The reflectivity of the Vorblendelementes of the invention can be adapted to the specific wavelength ranges used, so that the element in the operation of the. Plant assumes a temperature above the boiling point of solvents evaporating from the paint.
Eine Bestrahlungsanordnung gemäß der Erfindung kann weiterhin vorteilhaft in Strahlungstrocknungsanlagen zum Trocknen von Farben, Druckfarben, Lasuren, Ölen oder dergleichen in ein Substrat dauerhaft einzubringenden Stoffe verwendet werden. Das Substrat wird mit Strahlung beaufschlagt, die bis in eine bestimmte Tiefe in das Substrat eindringt. Hierdurch wird eine Trocknung bzw. Härtung der eingebrachten Stoffe verursacht, wobei Lösungsmittel aus der Farbe und/oder Bestandteile des Substrates selbst freiwerden können. Eine Auskleidung des Strahlungsraumes einer derartigen Anlage mit dem erfindungsgemäßen Vorblendelement führt auch hier zu einer erheblich verringerten Verschmutzung und damit geringerem Stillstand.An irradiation arrangement according to the invention can furthermore advantageously be used in radiation drying installations for drying paints, printing inks, glazes, oils or the like into substances to be permanently introduced into a substrate. The substrate is exposed to radiation which penetrates into the substrate to a certain depth. This causes a drying or hardening of the introduced substances, whereby solvents can be released from the color and / or constituents of the substrate itself. A lining of the radiation space of such a system with the Vorblendelement invention also leads to a significantly reduced pollution and thus lesser standstill.
Eine thermische Bestrahlungsanordnung gemäß der Erfindung kann weiterhin vorteilhaft Verwendung als Erwärmungsstrecke oder als Teil einer solchen in einer Anlage zur Streckblasformung finden, beispielsweise zur Herstellung von PET-Behältnissen aus Vorformlingen bzw. Preforms. Hierbei werden die Preforms in einer kurzen Zeitspanne auf eine Verstrecktemperatur von etwa 110°C erwärmt und im erwärmten Zustand einer Streckblasform zugeführt, in der unter Zuführung von Druckluft die endgültige Form des Behälters ausgeformt wird. Zur Erwärmung werden häufig Infrarotstrahler verwendet. Gegen- und Seitenreflektoren dienen zur Erzeugung eines für die Erwärmung der Preforms optimalen Strahlungsfeldes. Werden die Reflektoren nicht durch die Wandung selbst, sondern durch erfindungsgemäße Vorblendelemente gebildet, ergeben sich auch hier die oben in Bezug auf Trocknungsanlagen geschilderten Vorteile.A thermal irradiation arrangement according to the invention can furthermore advantageously be used as a heating section or as part of such in a system for stretch blow molding, for example for the production of PET containers from preforms or preforms. In this case, the preforms are heated in a short period of time to a drawing temperature of about 110 ° C and fed in the heated state of a stretch blow mold in which the final shape of the container is formed under the supply of compressed air. For heating, infrared radiators are often used. Counter and side reflectors are used to generate an optimum for the heating of the preform radiation field. If the reflectors are not formed by the wall itself, but by pre-blend elements according to the invention, the advantages described above with respect to drying systems also arise here.
Die Ausführung der Erfindung ist nicht auf diese Beispiele sowie die oben hervorgehobenen Aspekte beschränkt, sondern im Rahmen der Ansprüche ebenso in einer Vielzahl von Abwandlungen möglich, die im Rahmen fachgemäßen Handelns liegen.The embodiment of the invention is not limited to these examples and the aspects highlighted above, but within the scope of the claims also in a variety of modifications possible, which are within the scope of professional practice.
- 10, 10', 10"10, 10 ', 10 "
- Bestrahlungsanordnungirradiation device
- 11, 11', 11"11, 11 ', 11 "
- Wandungwall
- 12, 12'12, 12 '
- Befestigungseinrichtungfastening device
- 14-1 - 14-914-1 - 14-9
- Modulemodules
- 16, 16', 16"16, 16 ', 16 "
- VorblendelementeVorblendelemente
- 1818
- Kühlfluid-KanäleCooling fluid channels
- 20, 20', 2220, 20 ', 22nd
- Rahmen aus FederdrahtFrame made of spring wire
- 24, 24'24, 24 '
- Nietverbindungenriveted joints
- 2626
- Aufnahmebereichreception area
- 27, 27'27, 27 '
- KühlwasseranschlussCooling water connection
- 2828
- Öffnungen zum ZusammenfügenOpenings for joining
- 2929
- Oberfläche der WandungSurface of the wall
- 3030
- Strahlungstunnelradiation tunnel
- 3232
- Einstrahlungsbereichirradiation area
- 3434
- NIR-EmitterNIR emitter
- 3636
- Berührschutzcontact protection
Claims (11)
- Thermal radiation arrangement (10, 10', 10") for heating a material to be irradiated, having at least one high-performance radiation source for radiation having an essential active component in the visible and/or IR and/or UV range, in particular in the range of the near infrared (34), and at least one wall (11, 11', 11 ") which is exposed to radiation
characterized by
a pre-orifice element (16, 16', 16"), which is fixed to the wall with a distance, having a reflecting front side which is exposed to radiation and an emitting backside which is faced to the wall, wherein the pre-orifice element (16, 16', 16") is exchangeably fixed. - Radiation arrangement (10, 10', 10") according to claim 1,
characterized in that
the reflection and emission properties of the pre-orifice element (16, 16', 16") are determined such that during operation of the radiation arrangement a temperature above the temperature of the wall (11, 11', 11") is set. - Radiation arrangement (10, 10', 10") according to claim 1 or 2,
characterized in that
the front side of the pre-orifice element (16, 16', 16") is highly reflecting. - Radiation arrangement (10, 10', 10") according to one of the preceding claims,
characterized in that
the front side of the pre-orifice element (16, 16', 16") is diffusely reflecting. - Radiation arrangement (10, 10', 10") according to one of the preceding claims,
characterized in that
the backside of the pre-orifice element (16, 16', 16") is blackened. - Radiation arrangement (10, 10', 10") according to claim 1,
characterized in that
the pre-orifice element (16, 16', 16") is fixed by means of a snap fit or a clamp connection. - Radiation arrangement (10, 10', 10") according to one of the preceding claims,
characterized in that
the pre-orifice element (16, 16', 16") comprises a plurality of modules (14-1 up to 14-9), which are individually fixed, respectively. - Radiation arrangement (10, 10', 10") according to one of the preceding claims,
characterized by
a fixing equipment (12, 12') configured as a light supporting structure having wire sections, in particular made from spring wire, wherein the pre-orifice element (16, 16', 16") is profiled for fixing to wire sections. - Radiation arrangement (10, 10', 10") according to one of the preceding claims,
characterized in that
the pre-orifice element comprises aluminum sheet or a steel sheet which is enameled on one or both sides or is coated with ceramics. - Radiation arrangement (10, 10', 10") according to claim 9,
characterized in that
the aluminum sheet is polished at the front side and/or is anodized at the backside. - Radiation arrangement (10, 10', 10") according to one of the preceding claims,
characterized in that
the pre-orifice element (16, 16', 16") comprises a metal foil.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE102005000837.2A DE102005000837B4 (en) | 2005-01-05 | 2005-01-05 | Thermal irradiation arrangement for heating an item to be irradiated |
PCT/EP2005/012446 WO2006072282A1 (en) | 2005-01-05 | 2005-11-21 | Thermal irradiation system for heating material to be irradiated |
Publications (2)
Publication Number | Publication Date |
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EP1834147A1 EP1834147A1 (en) | 2007-09-19 |
EP1834147B1 true EP1834147B1 (en) | 2013-01-23 |
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EP05820615A Active EP1834147B1 (en) | 2005-01-05 | 2005-11-21 | Thermal irradiation system for heating material to be irradiated |
Country Status (3)
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EP (1) | EP1834147B1 (en) |
DE (1) | DE102005000837B4 (en) |
WO (1) | WO2006072282A1 (en) |
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DE102007058324A1 (en) * | 2007-12-04 | 2009-06-10 | Advanced Photonics Technologies Ag | Highly reflective lining element and irradiation arrangement |
Family Cites Families (28)
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US618978A (en) | 1899-02-07 | Island | ||
US618353A (en) | 1899-01-24 | huber | ||
US1115794A (en) | 1914-02-14 | 1914-11-03 | John P Flanagan | Operating-table attachment. |
US2419643A (en) | 1944-10-02 | 1947-04-29 | James W Swenson | Oven structure |
GB618353A (en) * | 1945-11-30 | 1949-02-21 | William James Miskella | Improvements in infrared ovens |
GB618978A (en) * | 1946-10-24 | 1949-03-02 | Gen Electric Co Ltd | Improvements in or relating to infra-red electric heating apparatus |
US2559249A (en) | 1948-02-18 | 1951-07-03 | William H Hudson | Infrared oven structure |
DE834970C (en) | 1950-09-26 | 1952-03-27 | Voigt & Haeffner Ag | Radiation dryer with tunnel-shaped drying room and electrically heated tubular heating elements |
US2688684A (en) | 1951-03-15 | 1954-09-07 | William J Miskella | Heating oven |
DD8211A3 (en) | 1952-12-07 | 1954-09-06 | ||
FR1105713A (en) | 1954-06-04 | 1955-12-07 | Prefabricated oven for heating by infrared radiation | |
GB1115794A (en) * | 1964-10-06 | 1968-05-29 | British Iron Steel Research | Material heat treatment furnace |
HU166885B (en) | 1973-11-02 | 1975-06-28 | ||
GB1489183A (en) | 1974-12-17 | 1977-10-19 | Hanovia Lamps Ltd | Reflector systems |
US4048490A (en) | 1976-06-11 | 1977-09-13 | Union Carbide Corporation | Apparatus for delivering relatively cold UV to a substrate |
US4135098A (en) | 1976-11-05 | 1979-01-16 | Union Carbide Corporation | Method and apparatus for curing coating materials |
SE448575B (en) | 1983-08-11 | 1987-03-02 | Tri Innovations Ab | REFLECTOR CONSTRUCTION FOR IR OVENS |
JPH06287091A (en) | 1993-02-02 | 1994-10-11 | Ngk Insulators Ltd | Sic-containing far-infrared ray emitter, drier and firing unit |
DE19736462C2 (en) | 1997-08-21 | 2003-06-18 | Advanced Photonics Tech Ag | Method and device for thermoforming thermoplastics |
DE19807643C2 (en) | 1998-02-23 | 2000-01-05 | Industrieservis Ges Fuer Innov | Method and device for drying a material to be dried on the surface of a rapidly conveyed carrier material, in particular for drying printing inks |
DE19810455C2 (en) | 1998-03-11 | 2000-02-24 | Michael Bisges | Cold light UV irradiation device |
DE19857044C2 (en) | 1998-10-09 | 2002-09-19 | Advanced Photonics Tech Ag | Inking fixation |
US6242717B1 (en) | 1999-08-30 | 2001-06-05 | Lucent Technologies Inc. | Removable reflector rack for an ultraviolet curing oven |
DE10038896B4 (en) | 2000-08-09 | 2004-09-30 | Advanced Photonics Technologies Ag | Method and device for the thermal fixing of laser prints |
DE10048361C1 (en) | 2000-09-29 | 2002-06-06 | Advanced Photonics Tech Ag | Arrangement for producing a coated heat-sensitive article or a container with a heat-sensitive content comprises a radiation source producing infrared radiation with an effective constituent in the near-infrared range |
DE10051641B4 (en) | 2000-10-18 | 2009-10-15 | Advanced Photonics Technologies Ag | irradiation device |
DE10051642B4 (en) | 2000-10-18 | 2009-06-25 | Advanced Photonics Technologies Ag | irradiation device |
DE10108926C1 (en) | 2001-02-23 | 2003-01-02 | Advanced Photonics Tech Ag | Heat treatment process used for changing the properties of a metal object comprises irradiating metal object e.g. a steel spring in a predetermined surface section with electromagnetic radiation produced by an emitter |
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- 2005-11-21 WO PCT/EP2005/012446 patent/WO2006072282A1/en active Application Filing
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EP1834147A1 (en) | 2007-09-19 |
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