EP2019956B1 - Procédé et dispositif d'irradiation - Google Patents

Procédé et dispositif d'irradiation Download PDF

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Publication number
EP2019956B1
EP2019956B1 EP07729222A EP07729222A EP2019956B1 EP 2019956 B1 EP2019956 B1 EP 2019956B1 EP 07729222 A EP07729222 A EP 07729222A EP 07729222 A EP07729222 A EP 07729222A EP 2019956 B1 EP2019956 B1 EP 2019956B1
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EP
European Patent Office
Prior art keywords
light
reflector
irradiation
irradiation apparatus
objects
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP07729222A
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German (de)
English (en)
Other versions
EP2019956A1 (fr
Inventor
Armin Beying
Ruben Cremer
Oliver Treichel
Günter Fuchs
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IST Metz GmbH
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IST Metz GmbH
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Publication of EP2019956A1 publication Critical patent/EP2019956A1/fr
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Publication of EP2019956B1 publication Critical patent/EP2019956B1/fr
Not-in-force legal-status Critical Current
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun

Definitions

  • the invention relates to an irradiation device for irradiating objects in an irradiation room with UV light and / or visible light, in particular for UV irradiation of three-dimensionally shaped objects, with a lamp housing having a light exit opening, an elongate light source arranged in the lamp housing and an imaged light source Lamp housing arranged primary reflector, the light emitted during the irradiation of objects to the primary reflector toward reflected light through the light exit opening into the irradiation space, in particular to a pointing to the light exit opening surface of the objects.
  • the invention also relates to a corresponding irradiation method.
  • An irradiation device of this kind is known for example from US Pat EP 1 169 611 B1 the applicant known.
  • the known irradiation device is mainly used for curing solvent-free coating systems, which are transported for irradiation by a located in front of a light exit opening of the lamp housing irradiation space, such as curing of printing inks on substrates in web and sheet-fed offset printing machines.
  • the UV lamp of such an irradiation device usually consists of a mercury medium-pressure gas discharge lamp whose emission spectrum can be adapted by appropriate doping to the chemical composition of the respective paints or varnishes.
  • the irradiation device has a reflector arranged inside the lamp housing, which extends over the entire length of the lamp and surrounds it during the irradiation on the side remote from the light exit opening in a semicircular manner to that of the UV lamp away from the light exit opening emitted into the interior of the housing UV light through the light exit opening out of the housing to steer the coating system located in front of the light exit opening.
  • the surfaces to be hardened are not uniformly irradiated with the UV light emitted by the lamp, which moreover falls only partially on the surfaces to be irradiated, while the remainder reaches the walls of the irradiation space, whereby the UV radiation Light even in the case of a mirroring of these walls is largely ineffective. Since not only in the case of objects to be cured but also in other objects often a part of the surfaces to be cured is completely or partially remote from the light exit opening of the irradiation facilities, it is also necessary for irradiation of these surfaces, either the objects during their Vorbeipearss to the light exit opening rotate or arrange further irradiation devices around the transport path of the objects. While the first mentioned action complicates the handling of the objects, the latter has Measure not only higher investment and operating costs but also a total deterioration of the radiation balance.
  • the object of the invention is to improve an irradiation device and an irradiation method of the type mentioned at the outset so that a better utilization of the light is made possible, in particular in the irradiation of three-dimensionally shaped objects.
  • a uniform surface treatment with simple handling should be ensured.
  • This object is achieved by at least one arranged outside the lamp housing adjustable secondary reflector, which partially surrounds the irradiation room and adjusted by adjusting means in its orientation to the objects so that the objects also on their side facing away from the light exit opening surface of said light source are irradiated.
  • the measure according to the invention it is possible by means of a suitable alignment of the at least one secondary reflector according to the shape and size of the objects on the one hand to direct a considerably larger part and ideally almost 100 percent of the light emerging from the light exit opening onto the surfaces to be cured of the objects and On the other hand, to achieve a uniform all-round irradiation of these surfaces with light or electromagnetic radiation.
  • the in the object area The radiation incident on the respective object located there is therefore composed of direct light from the light source, reflected light reflected from the primary reflector with a large opening angle, and reflection light reflected from the secondary reflector to the shadow side of the object facing away from the light exit opening. This not only simplifies the handling of the objects, but also their length of stay in the irradiation room can be shortened.
  • the term primary or secondary reflector has been chosen because the light emitted from the light source or UV lamp away from the lamp chamber toward the interior of the housing is first reflected by the primary reflector disposed inside the housing and emitted out of the lamp housing through the light exit opening before a part This light is reflected on the secondary reflector again and thrown onto the object.
  • the secondary reflector comprises a plurality of reflector segments, which are adjustable with respect to each other by means of the adjusting means, so that to adapt to differently shaped objects, the geometry of the secondary reflector and thus the alignment of reflective surfaces of the reflector segments as needed can change.
  • the reflector segments preferably have an elongated shape, wherein they are aligned parallel to each other and to the light source or to a transport path, along which the objects to be irradiated transported by a conveyor in a direction parallel to the longitudinal axis of the light source transport direction at the light exit opening through the irradiation space become.
  • the adjacent reflector segments are preferably angle-adjustable to each other pivoted and pivotable relative to each other about a pivot axis parallel to a longitudinal axis of the light source, so that their alignment, ie in this case their angular position in a plane perpendicular to the transport path to adapt to the respective object geometry.
  • the pivot axes between adjacent reflector segments are advantageously arranged in extension of reflective surfaces of the reflector segments, so that the distance between the reflective surfaces of adjacent reflector segments during pivoting thereof does not change.
  • the adjusting means for adjusting the reflector segments are preferably arranged at their rear side facing away from the irradiation space, wherein in the case of a manual adjustment in discrete steps appropriately adjacent reflector segments are provided with overlapping adjusting members, which can be locked in relation to each other in different positions, for example by in each of the overlapping pairs of adjusting members, a row of passage openings or bolt holes which is coaxial with the pivot axis and which can be brought into coincidence for passing a locking bolt in different pairs.
  • the adjusting means may also comprise one or more servo motors, if the adjustment of the reflector segments is to be motorized and / or stepless.
  • the secondary reflector is preferably mounted cantilevered on the lamp housing adjacent to the light exit opening, wherein it is expedient as a whole in relation to the lamp housing adjustable.
  • the secondary reflector may expediently have a variable number of reflector segments and / or alternatively be exchangeable for a secondary reflector with a different number or arrangement of reflector segments.
  • the secondary reflector is formed by two opposing individual reflectors which are mounted on both sides of the light exit opening on the lamp housing and preferably each pivotable about an axis parallel to the longitudinal axis of the light source pivot axis, so that they at least partially the irradiation space on opposite sides of the transport path of the objects in a half space limit and align according to the geometry of the objects.
  • the two individual reflectors are preferably adjustable independently of one another, so that an asymmetrical object geometry in relation to the transport path can also be taken into account.
  • each individual reflector In order to optimally adapt the alignment of each individual reflector with respect to a uniform irradiation to the predetermined geometry of the objects, it is expedient to carry out a so-called ray-tracing before the irradiation, in which the beam path of the light is calculated for different adjustment positions of each individual reflector or of its reflector segments is simulated to then select the best adjustment position.
  • the primary reflector preferably has an opening angle of more than 90 ° and is beyond expediently designed as a hinged reflector, which can be moved to start the lamp and to interrupt the irradiation between the lamp and the light exit opening.
  • the latter is expediently closed by a quartz glass pane in order to prevent the penetration of contaminants into the lamp housing and to permit independent air conduction inside the housing and in the irradiation space and in the latter to provide an oxygen-reduced atmosphere.
  • a respective front reflector is advantageously arranged in order to achieve a better utilization of the light emitted by the lamp by a virtual extension of the lamp.
  • the at least one secondary reflector with respect to the light exit opening is positioned so that the surfaces of the objects are irradiated all around at the same time.
  • the object mentioned is achieved in that at least one arranged outside the lamp housing and the irradiation space partially surrounding secondary reflector, the object is irradiated at the same time on its side facing away from the light exit opening surface or shadow side of said light source.
  • the irradiation device 2 shown in the drawing is used for irradiating three-dimensionally shaped objects with UV light for curing previously coated surfaces of the objects that are in Fig. 1 are shown schematically and by way of example with a cross-sectionally square beam 4 and for their irradiation by a transport means (not shown) along a transport path 6 (FIG. Fig. 3 ) are moved by an irradiation space 8 of the irradiation device 2 which can be exposed to UV light.
  • the irradiation device 2 comprises a UV base unit 10 with an elongated lamp housing 12, an elongated double-ended UV lamp 14 and an elongate primary reflector 16, which are each arranged in a lamp chamber 18 of the lamp housing 12 and have a longitudinal axis parallel to the transport path 6, as well as a adjustable secondary reflector 20, which can be arranged by changing its orientation around the irradiation space 8 around that it completely or partially surrounds, thereby making it possible, not only in the direction of a light exit opening 22 of the lamp housing 12 facing surfaces of the objects, but also their other surfaces to be uniformly irradiated with the UV light, which emerges from the light exit opening 22 during operation of the irradiation device 2.
  • the double-walled lamp housing 12 of the UV base unit 10 consists essentially of an outer housing 24 in the form of an U-shaped, made of light metal extruded profile, a spaced from the outer housing 24, the lamp chamber 18 limiting inner housing 26 in the form of a cross-section U-shaped bent metal sheet, two arranged on the opposite ends of the lamp housing 12 end walls 28 and the light exit opening 22 occluding quartz glass plate 30 which separates the lamp chamber 18 from the irradiation chamber 8.
  • the quartz glass pane 30 prevents ingress of contaminants in the lamp chamber 18 and the UV lamp 14 and also allows on the one hand overpressure or negative pressure ventilation of the lamp housing 12 without affecting the irradiation chamber 8 and on the other hand, a reduction of the oxygen content in the irradiation space 8 without affecting the cooling air flow in the lamp compartment 18.
  • a reduction in the atmospheric oxygen content in the irradiation space 8 is advantageous for two reasons, firstly because the attenuation of the UV-C / B radiation on its way from the UV lamp 14 to the objects is lower, and secondly because at the surfaces of the objects inhibition by atmospheric oxygen largely prevented and thus the UV drying performance can be increased.
  • a forced ventilation (not shown) of the outer housing 24 allows use of the base unit 10 at ambient temperatures up to 135 ° C.
  • the UV lamp 14 is a mercury medium pressure gas discharge lamp with a specific power of 80-240 W per cm lamp length. Since such lamps 14 can not be switched on and off spontaneously, the primary reflector 16 is formed as a two-part hinged reflector, the reflector halves 16a and 16b at startup of the lamp 14 or in the event of interruption of the operation of the irradiation device 2 from a in Fig. 1 shown operating position in which its opening angle to the light outlet opening 22 is more than 90 °, in an in Fig. 2 shown closure position are pivotable, in which they direct the light emitted by the UV lamp 14 in the direction of the light exit opening 22 on a light opposite the Lichtausbergsöffrung 22 on the inner housing 26 mounted absorber 32.
  • the primary reflector 16 has a parabolic surface facing the UV lamp 14 which, in the operating position, reflects the light emitted by the UV lamp 14 with parallel alignment through the light exit opening 22 into the irradiation space 8.
  • the lamp housing 12 includes two disposed on the inner sides of the end walls 28 end reflectors 34, with which a virtual extension of the lamp 14 and thus better utilization of the radiated from the lamp 14 UV light is possible.
  • the secondary reflector 20 consists of two individual reflectors 20a and 20b, which are fastened on both sides of the light exit opening 22 on the base unit 10, extending along the transport path 6 of the objects parallel to the longitudinal axis of the lamp 14 and the lamp housing 12 and the irradiation space 8 at both Limit sides of this path.
  • Each of the two individual reflectors 20a, 20b consists of a plurality of narrow elongated reflector segments 36, which also extend parallel to the longitudinal axis of the lamp 14 and the lamp housing 12 and are assembled into a self-supporting structure.
  • the number of reflector segments 36 of each of the two individual reflectors 20a, 20b is eight in the embodiment shown in the drawing, but can be made larger or smaller if required by one or more reflector segments at the free ends of one or both individual reflectors 20a, 20b 36 be added or removed.
  • the individual reflector segments 36 each whiten a mirror 38 which is inserted into a prefabricated one-piece holder 40 with a flat trapezoidal cross-section and has a reflecting surface facing the irradiation space 8.
  • the reflecting surface of the mirror 38 is flat, but it may also be curved if necessary.
  • the reflective surfaces of the mirrors 38 are formed by a suitable coating on the mirrors 38, for example an aluminum coating that reflects both UV light and IR radiation, or a coating from an IR-transmissive material to achieve pure UV or cold light reflection.
  • the brackets 40 of the reflector housing 36 not adjacent to the lamp housing 12 or not at the free ends of the individual reflectors 20a, 20b are each pivotally connected to the brackets 40 of both adjacent reflector segments 36 so that the angle enclosed by reflective surfaces of the adjacent mirror 38 and thus also the beam path of the UV light reflected by the mirrors 38 can be changed as desired by adjustment of the reflector segments 36.
  • the brackets 40 of the lamp housing 12 adjacent reflector segments 36 are pivotally connected to the holder 40 of an adjacent reflector segment 36 and beyond hinged to the light exit opening 22 limiting profile edge 42 of the outer housing 24, so that each individual reflector 20a, 20b as a whole independent of the other individual reflector 20b, 20a can be pivoted with respect to the lamp housing 12, as in Fig. 1 and 2 illustrated by the example of the right single reflector 20b.
  • the holders 40 are provided on their rear sides facing away from the irradiation space 8 with adjusting means 44, which in the embodiment shown in the drawing, a stepwise enlargement or reduction of the angle between the mirrors 38 adjacent reflector segments 36 in steps of for example. 5 ° permit. How best in Fig.
  • the adjusting means 44 comprise adjusting segments 46 which are segmented in a circle on the reflector side by a chord 48 and whose substantially closed half is fastened along one half of the chord 48 on the back side of one of the holders 40, while their other one is provided with a recess 48 Half depending on the included with the adjacent bracket 40 angle more or less far over the adjacent Bracket 40 protrudes, wherein it overlaps with a complementary protruding half of a mounted with reverse orientation at a small axial distance on this bracket 40 adjusting disk 46.
  • Both adjusting discs 46 are provided at angular intervals of 5 ° with axial passage openings 50 which are arranged on a pivot axis 52 of the brackets 40 coaxial arc and in a plurality of adjustable angular positions in pairs aligned with each other, so that a locking pin 53 (FIGS. Fig. 1 ) can be slid through the two aligned openings 50 to lock the adjacent reflector segments 36 in the desired angular position with respect to each other.
  • Corresponding adjusting discs 46 are also attached to the outer housing 24 of the base unit 10 and overlap with adjusting discs 46 of the adjacent reflector segments 36 to allow adjustment of the individual reflectors 20a, 20b as a whole in relation to the base unit 10.
  • the pivot axes 52 between the respective adjacent reflector segments 36 and between the lamp housing 12 and the respective adjacent reflector segment 36 are parallel to the longitudinal axis of the lamp 14 and the lamp housing 12 and thus also parallel to the transport path 6 of the objects and are also in extension of the reflective surfaces the mirror 38 is arranged so that the distance between the mirrors 38 of adjacent reflector segments 36 remains the same irrespective of their pivotal position.
  • a motor and / or stepless adjustment is possible, for example by means of a drive pinion provided with a servo motor on one of the brackets, with a circular arc-shaped toothing on the outer periphery of an adjusting disc on the adjacent support is engaged (not shown).
  • a cross-sectionally square beam 4 is moved along the transport path 6 through the irradiation space 8, which is partially enclosed on the left and right of the base unit 10 by one of the two individual reflectors 20a, 20b of the secondary reflector 20.
  • the reflector segments 36 of the individual reflectors 20a, 20b are arranged there so that in each case three substantially flat reflector surfaces 54, 56, 58 are formed, which are arranged at an angle of 120 °, 95 ° or 45 ° to the plane of the light exit opening 22, wherein the first reflector surface 54 adjacent to the base unit 10 is formed by the reflective surfaces of two reflector segments 36 and the two other reflector surfaces 56, 58 by the reflective surfaces of three reflector segments 36.
  • the same light intensity or irradiation quantity is obtained as on the two opposite sides of the beam 4 which are perpendicular to the plane of the light exit opening 22.
  • a virtually uniform all-round hardening of the beam 4 can be achieved achieve when the same then moves through the irradiation space 8 of a further identical irradiation device 2, the base unit 10 with its light exit opening 22 opposite to the underside of the beam 4.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Claims (15)

  1. Dispositif d'irradiation pour irradier des objets dans une chambre d'irradiation avec de la lumière UV et/ou de la lumière visible, notamment pour irradier des objets formés en trois dimensions, comportant un logement de lampe (12), qui présente une ouverture de sortie de lumière (22), une source de lumière (14) allongée disposée dans le logement de lampe, notamment une lampe UV, et un réflecteur primaire (16) disposé dans le logement de lampe, qui réfléchit pendant l'irradiation de la lumière émise dans la direction du réflecteur primaire à travers l'ouverture de sortie de lumière (22) dans la chambre d'irradiation notamment sur une surface des objets tournée vers l'ouverture de sortie de lumière (22), caractérisé par au moins un réflecteur secondaire (20, 20a, 20b) réglable disposé à l'extérieur du logement de lampe (12), qui entoure partiellement la chambre d'irradiation (8) et est adapté ou modifiable par des moyens de réglage (44) dans son orientation par rapport aux objets (4), de telle sorte que les objets soient irradiés aussi sur leur surface qui se détourne de l'ouverture de sortie de lumière (22) par ladite source de lumière (14).
  2. Dispositif d'irradiation selon la revendication 1, caractérisé en ce que le réflecteur secondaire (20, 20a, 20b) comprend plusieurs segments réflecteurs (36) réglables par les moyens de réglage (44) les uns par rapport aux autres.
  3. Dispositif d'irradiation selon la revendication 2, caractérisé en ce que les segments de réflecteur (36) présentent une forme allongée et sont orientés parallèlement les uns aux autres et par rapport à la source de lumière (14).
  4. Dispositif d'irradiation selon les revendications 2 ou 3, caractérisé en ce que des segments de réflecteur (36) voisins sont reliés par charnière articulée de manière réglable angulairement.
  5. Dispositif d'irradiation selon une des revendications 2 à 4, caractérisé en ce que les segments de réflecteur (36) voisins peuvent être basculés les uns par rapport aux autres autour d'un axe de basculement (52) parallèle à l'axe longitudinal de la source de lumière (14).
  6. Dispositif d'irradiation selon une des revendications 2 à 5, caractérisé en ce que les segments de réflecteur sont réglables par des servomoteurs des moyens de réglage.
  7. Dispositif d'irradiation selon une des revendications précédentes, caractérisé en ce que le réflecteur secondaire (20, 20a, 20b) est formé par deux réflecteurs individuels (20a, 20b) en vis-à-vis et réglables de préférence d'une manière particulière l'un par rapport à l'autre.
  8. Dispositif d'irradiation selon la revendication 7, caractérisé en ce que les réflecteurs individuels (20a, 20b) sont montés sur des bords de côtés longitudinaux opposés (42) de l'ouverture de sortie de lumière (22) sur le logement de lampe (12).
  9. Dispositif d'irradiation selon les revendications 6 ou 7, caractérisé en ce que les réflecteurs individuels (20a, 20b) sont basculables sur le logement de lampe (12) autour d'un axe de basculement parallèle à l'axe longitudinal de la source de lumière (14).
  10. Dispositif d'irradiation selon une des revendications précédentes, caractérisé en ce que le réflecteur primaire (16, 16a, 16b) présente un angle d'ouverture de plus de 90 degrés.
  11. Dispositif d'irradiation selon une des revendications précédentes, caractérisé en ce qu'au moins une partie (16a, 16b) du réflecteur primaire (16, 16a, 16b) est déplaçable devant l'ouverture de sortie de lumière (22).
  12. Dispositif d'irradiation selon une des revendications précédentes, caractérisé en ce que le logement de lampe (12) est obturé sur son ouverture de sortie de lumière (22) par une vitre de verre au quartz (30).
  13. Dispositif d'irradiation selon une des revendications précédentes, caractérisé par un dispositif de transport disposé dans la chambre d'irradiation (8) pour transporter les objets à irradier dans une direction de transport parallèle à l'axe longitudinal de la source de lumière.
  14. Dispositif d'irradiation selon une des revendications précédentes, caractérisé en ce qu'au moins un réflecteur secondaire (20, 20a, 20b) est positionné par rapport à l'ouverture de sortie de lumière (22), de telle sorte que les objets (4) soient irradiés simultanément tout autour de leurs surfaces.
  15. Procédé d'irradiation d'objets dans une chambre d'irradiation avec de la lumière UV et/ou de la lumière visible, notamment pour irradier des objets formés en trois dimensions, dans lequel au moyen d'une source de lumière (14) allongée disposée dans un logement de lampe (12) et d'un réflecteur primaire (16) disposé dans le logement de lampe de la lumière est irradiée à travers une ouverture de sortie de lumière (22) du côté du logement sur la surface tournée vers l'ouverture de sortie de lumière (22) de l'objet (4) à irradier, caractérisé en ce qu'à travers au moins un réflecteur secondaire (20, 20a, 20b) disposé à l'extérieur du logement de lampe (12) et entourant partiellement la chambre d'irradiation (8), l'objet (4) est simultanément irradié sur sa surface qui se détourne de l'ouverture de sortie de lumière (22) avec de la lumière provenant de ladite source de lumière (14).
EP07729222A 2006-05-24 2007-05-16 Procédé et dispositif d'irradiation Not-in-force EP2019956B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006025623 2006-05-24
PCT/EP2007/054774 WO2007135063A1 (fr) 2006-05-24 2007-05-16 Procédé et dispositif d'irradiation

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Publication Number Publication Date
EP2019956A1 EP2019956A1 (fr) 2009-02-04
EP2019956B1 true EP2019956B1 (fr) 2012-10-10

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EP07729222A Not-in-force EP2019956B1 (fr) 2006-05-24 2007-05-16 Procédé et dispositif d'irradiation

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DE102008061597B4 (de) * 2008-12-11 2021-06-24 Venjakob Maschinenbau Gmbh & Co. Kg UV-Bestrahlungsvorrichtung
DE102011079531A1 (de) * 2011-07-21 2013-01-24 Ist Metz Gmbh Bestrahlungsvorrichtung zur UV-Strahlungsbehandlung
DE102019219511B4 (de) * 2019-12-12 2021-06-24 Heraeus Noblelight Gmbh Belichtungsvorrichtung mit einer vielzahl optischer elemente und einer modularen elektromagnetischen strahlungsquelle, die ein strahlungsquellenmodul mit einem halbwertswinkel beinhaltet

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FR903217A (fr) * 1944-04-05 1945-09-27 Dispositif d'irradiation, chauffage et réfrigération par rayonnement
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EP2019956A1 (fr) 2009-02-04
WO2007135063A1 (fr) 2007-11-29

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