EP2189227A1 - Procédé et dispositif de rayonnement d'un corps doté d'un rayonnement électromagnétique - Google Patents

Procédé et dispositif de rayonnement d'un corps doté d'un rayonnement électromagnétique Download PDF

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Publication number
EP2189227A1
EP2189227A1 EP09013939A EP09013939A EP2189227A1 EP 2189227 A1 EP2189227 A1 EP 2189227A1 EP 09013939 A EP09013939 A EP 09013939A EP 09013939 A EP09013939 A EP 09013939A EP 2189227 A1 EP2189227 A1 EP 2189227A1
Authority
EP
European Patent Office
Prior art keywords
sources
electromagnetic radiation
predetermined direction
radiation
predetermined
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.)
Granted
Application number
EP09013939A
Other languages
German (de)
English (en)
Other versions
EP2189227B1 (fr
Inventor
Michael Deger
Thomas Hielscher
Sebastian Roller
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.)
Mercedes Benz Group AG
Original Assignee
Daimler AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daimler AG filed Critical Daimler AG
Publication of EP2189227A1 publication Critical patent/EP2189227A1/fr
Application granted granted Critical
Publication of EP2189227B1 publication Critical patent/EP2189227B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
    • B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
    • B05D3/065—After-treatment
    • B05D3/067—Curing or cross-linking the coating

Definitions

  • the invention relates to a method for irradiating a body with electromagnetic radiation, wherein the body has a coating on its surface whose properties permanently change the electromagnetic radiation.
  • the main application is the curing of paint on a motor vehicle body.
  • the body is moved relative to sources of electrical radiation, ie either the body is moved or the source is moved or both.
  • the relative movement should take place along a predetermined direction, typically in a straight line, wherein a distance variable can be defined along the predetermined direction.
  • a moving body for example, it is easy to measure at which point in the room it is located and thus specify a distance.
  • All sources irradiate a respective area of the surface of the body with electromagnetic radiation.
  • a method in which the body passes sources of ultraviolet radiation is known in the art as operating in the art WO 2005/011878 A2 disclosed device known.
  • the device serves to uniformly irradiate a motor vehicle body with ultraviolet radiation.
  • the spatial position of a source is motorized changeable.
  • UV-curing coating systems are of particular importance among the paints, or paints which can be radically cured by photochemical and thermal initiation.
  • Ultraviolet radiation (UV radiation) or infrared radiation (IR radiation) are therefore suitable as suitable electromagnetic radiation for curing such coatings.
  • different sources arranged one behind the other (typically offset in the direction perpendicular to the predetermined direction) irradiate such respective regions that at least a portion thereof extends over the same interval defined by two particular values for the distance ,
  • the invention is based on the recognition that two corrals arranged one behind the other do not necessarily have to irradiate regions arranged one behind the other along the direction of movement of the body relative to the source. Rather, sources arranged one behind the other can simultaneously irradiate the same strip, wherein preferably the strip is completely irradiated. During the relative movement between the body and the sources, this strip then moves over the surface of the body, and the body is gradually irradiated uniformly.
  • the complete irradiation of a strip by the source can be expressed in such a way that preferably all areas of the surface of the body irradiated by sources form a closed surface. As a rule, there will be an overlap between the areas irradiated by the sources.
  • a first step in this regard is already given when the areas irradiated by two sources arranged one behind the other form a closed surface.
  • the sources should not all be arranged at the same height one behind the other. Rather, it is precisely preferred that sources arranged one behind the other in a predetermined direction in a direction which are simultaneously perpendicular to the predetermined direction and perpendicular to a (defined by a representative beam, preferably the central beam and thus, for example, a surface normal) emission direction is located in different positions, in other words, therefore, offset from one another.
  • the offset may also look exactly like the holes in the strip that are not irradiated by sources of a first column being irradiated by the sources of a second column and vice versa.
  • the device according to the invention for irradiating bodies with electromagnetic radiation has a plurality of sources of electromagnetic radiation.
  • the electromagnetic radiation includes those wavelength ranges which are suitable for curing UV lacquers.
  • the sources emit ultraviolet (UV) radiation.
  • the device has means for generating a relative movement of a body to the sources in a predetermined direction along which a distance variable is definable.
  • the device should be designed so that the relative position between the source and the body is not entirely random, but should give a sequence of desired relative positions between sources and body to a predetermined body or to a kind of predetermined bodies. For example, a vehicle body on rails Passing fixed sources, the rails, along with the shape of the vehicle body, determine the distance at which a particular location of the surface to a particular source is at a particular traveling position of the body on the rail.
  • At least two sources should now be arranged one behind the other in the predetermined direction.
  • these two sources are aligned or alignable that are radiated by the outgoing of you electromagnetic radiation at Given a Sollrelativ too to a predetermined body or a body of predetermined type on the surface of this body respective areas, of which at least a partial area in each case the same, defined by two specific values for the distance size interval extends.
  • the inventive method can be carried out, namely in particular a strip on the surface of exactly this body completely irradiate.
  • At least one source is about an axis which is perpendicular to the predetermined direction of relative motion and perpendicular to a source-definable emission direction (eg, the direction of the center beam or a surface normal of an element of the body) for electromagnetic radiation , swiveling.
  • a source-definable emission direction eg, the direction of the center beam or a surface normal of an element of the body
  • Sources of electromagnetic radiation are pivotable about an axis which is parallel to the predetermined direction of the relative movement. In the present case, the source should be able to change its emission direction relative to the movement path.
  • the device is more flexibly adaptable to different shapes of bodies when the source is pivotable.
  • the pivotable source is preferably pivotable by means of an electric motor.
  • the relevant information is stored in a control unit which serves to drive the electric motors. Now, if the control unit information about the type of a body introduced into the device can be fed, the control unit can select the appropriate pivoting position for this body and control the electric motor accordingly.
  • the information can be supplied, for example, via a simple input device by an operator, but it can also be used automatic detection mechanisms in the device. So there may be an image recognition, by which the type of the body is derived. It is easier if the body z. B. is provided as part of a production line with an identifier.
  • the identifier may be a simple bar code on the body read by a bar code reader, radio tags may be used, etc.
  • sources of identical construction are used, and then the relative position of the sources relative to one another can already be recognized from the outside at the position of the housing.
  • the invention then intentionally disregards parallel alignment of the sources.
  • Parallel here means that the surface normals of certain surfaces on the same components are parallel to each other, exit openings for electromagnetic radiation in the same direction, etc.
  • the electromagnetic radiation is not just emitted in parallel, but the beams run towards each other in a plan view.
  • the sources are preferably arranged offset to one another.
  • the invention relates to the arrangement of ultraviolet sources in an apparatus for irradiating a body with ultraviolet radiation.
  • the body is a painted automotive body, and the exposure to ultraviolet light serves to cure the paint.
  • the ultraviolet radiation must be irradiated for a predetermined time at a predetermined intensity.
  • a disadvantage of the quality of the paint is when the intensity fluctuates during the predetermined time or even in the meantime the irradiation is permanently interrupted and resumed.
  • the irradiation of the motor vehicle body now takes place by means of ultraviolet radiation sources, which are spaced from the surface and irradiate certain areas of the motor vehicle. It should be ensured that, when the motor vehicle moves past the radiation sources, all points on the surface of the motor vehicle, ie all the paint spots, are irradiated in such a way that the paint cures optimally.
  • FIG Fig. 1 The prior art has now used an arrangement as shown schematically in FIG Fig. 1 is shown.
  • a side wall of a motor vehicle body K is irradiated, which we assume to be even for a present simplified consideration.
  • two rows of ultraviolet radiation sources are provided, namely a first row of the radiation sources Q1, Q2 and Q3 and a second row of the radiation sources Q4 and Q5.
  • the motor vehicle body K is transported past the sources according to the arrow P in a manner known per se. As a result, any point on the surface of the motor vehicle body K will eventually pass by one of the sources Q1 to Q5.
  • the sources Q1 to Q5 can not radiate beyond their full dimensions, but typically have a small exit window for radiation.
  • the sources Q1, Q2 and Q3 irradiate the surface O of the body K in regions B1, B2 and B3 which do not form a closed surface but are spaced apart from each other.
  • the sources Q4 and Q5 are now offset from the sources Q1 to Q3 of the same construction and radiate to areas B4 and B5.
  • all points on the surface O pass through the radiation pattern according to FIG Fig. 3 from right to left. This means that z. B. a point on the surface, which is exactly in the movement of the body K between the areas B1 and B2, at a subsequent time exactly in the area B4 and is also still irradiated.
  • Curves 10 and 12 indicate how the intensity with which certain points are irradiated varies over time.
  • Identification of the arrangement Fig. 1 is it that, as in Fig. 2 to recognize, the respective central rays Z1 and Z4 of the beams emanating from the sources Q1 and Q4, parallel to each other.
  • the central rays are in this case equated with the surface normals of the body K facing front surfaces of the sources Q1 and Q4, z. B. the exit window.
  • this configuration is deviated from: sources Q11, Q12 and Q13 from a first series of ultraviolet radiation sources are inclined to sources Q14, Q15 from a second series of ultraviolet radiation sources.
  • both groups of sources are inclined to the surface normal N of the vehicle body K.
  • Both the central beam Z11 from the source Q11 and the central beam Z14 from the source Q14 are not perpendicular to the surface of the body K.
  • the source Q11 thus irradiates a region B11, which coincides with a region B14
  • the area B14 overlaps with the area B12 irradiated by the source Q12
  • the area B12 overlaps with an area B15 which the source Q15 irradiates
  • the area B15 overlaps with an area B13 which the area Source Q13 irradiated.
  • boundary lines S1 and S2 can be assigned values I 1 and I 2 for the length along a path that runs along the direction of movement according to the arrow P.
  • the motor vehicle body K passes according to the arrow P at the sources Q11, Q12, Q13, Q14 and Q15, then a continuous strip of the surface of the body is irradiated, and this strip migrates on the surface of the body K.
  • the body K homogeneously irradiated at each point in the area of the strip. Therefore, a point moving along the trajectory PA 'receives a radiation intensity according to the curve 14, and a point moving along the trajectory PB' receives a radiation intensity according to the curve 16.
  • the radiation intensities according to the curve 14 and The curve 16 hardly differ from each other.
  • both the area B11 has a partial area TB11 (in Fig. 7 hatched), as well as the area B14 has a partial area TB14 (hatched in the other direction), which extends over the interval I 1 to I 2 .
  • the areas lying outside the subareas TB11 and TB14 are negligible, and an overlapping area Ü is also negligible. This is the case in particular when the subregions TB11 and TB14 comprise at least 50% of the respective regions B11 and B14, preferably at least 70% and particularly preferably at least 90% of these regions.
  • the central rays of the beams emanating from the sources Q11, Q12, Q13 and Q14 as well as Q15 present here on the surface O at points which form exactly a straight line. This corresponds to the situation according to Fig. 6 in which (only) in plan view, the central rays Z11 and Z14 intersect exactly on the motor vehicle body K.
  • the sources Q11, Q12, Q13, Q14 and Q15 are preferably designed pivotable, at least according to the arrow V1 to a perpendicular to the central rays Z11 and Z14 on the one hand and perpendicular to the direction of movement of the motor vehicle body according to the arrow P on the other hand pivot axis A11 and A14.
  • Changes in the exchange of the vehicle body K by another body, the distance from the surface to the sources, the sources are simply pivoted according to the arrow V1 about the respective axes A11, A14 until again the situation according to Fig. 7 prevails.
  • the pivoting according to the arrow V1 can be done by means of an electric motor, which is assigned to the respective source Q11, Q12, Q13, Q14 and Q15.
  • a control unit can then according to their information about the vehicle body K, the sources Q11 to Q15 then pivot accordingly.
  • an additional pivoting possibility according to the arrow V2 around an axis parallel to the direction of movement according to the arrow P extending axis in at least some of the sources Q11, Q12, Q13, Q14, Q15 is advantageous.
  • the sources Q11, Q12 and Q13 on the one hand and the sources Q14 and Q15 on the other hand could also be arranged on a curved arc so that on a curved surface O of a body K a situation according to FIG Fig. 7 will be produced.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Coating Apparatus (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
EP09013939A 2008-11-20 2009-11-06 Procédé et dispositif de rayonnement d'un corps doté d'un rayonnement électromagnétique Not-in-force EP2189227B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008058327A DE102008058327B4 (de) 2008-11-20 2008-11-20 Vorrichtung zum Bestrahlen eines Körpers mit elektromagnetischer Strahlung

Publications (2)

Publication Number Publication Date
EP2189227A1 true EP2189227A1 (fr) 2010-05-26
EP2189227B1 EP2189227B1 (fr) 2011-09-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP09013939A Not-in-force EP2189227B1 (fr) 2008-11-20 2009-11-06 Procédé et dispositif de rayonnement d'un corps doté d'un rayonnement électromagnétique

Country Status (3)

Country Link
EP (1) EP2189227B1 (fr)
AT (1) ATE523264T1 (fr)
DE (1) DE102008058327B4 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2242259A (en) * 1990-03-22 1991-09-25 Metal Box Plc A lamp assembly
DE10224514A1 (de) * 2002-05-31 2003-12-18 Air Liquide Gmbh UV-Härtung von Lacken mit Inertisierung
WO2005011878A2 (fr) 2003-07-24 2005-02-10 Eisenmann Maschinenbau Gmbh & Co. Kg Dispositif de durcissement d'un revetement d'un objet, ce revetement etant constitue d'un materiau durcissant sous l'action d'un rayonnement electromagnetique, notamment d'une peinture uv ou d'une peinture a durcissement thermique
DE102007012897A1 (de) 2007-03-17 2007-11-29 Daimlerchrysler Ag UV-Belichtungsraum

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10136501C1 (de) * 2001-07-27 2002-11-07 Gunther Ackermann Bestrahlungsvorrichtung mit Abluftdüse
DE102007029316B4 (de) * 2007-06-22 2011-02-10 Volker Schrage Vorrichtung zum UV-Strahlungshärten

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2242259A (en) * 1990-03-22 1991-09-25 Metal Box Plc A lamp assembly
DE10224514A1 (de) * 2002-05-31 2003-12-18 Air Liquide Gmbh UV-Härtung von Lacken mit Inertisierung
WO2005011878A2 (fr) 2003-07-24 2005-02-10 Eisenmann Maschinenbau Gmbh & Co. Kg Dispositif de durcissement d'un revetement d'un objet, ce revetement etant constitue d'un materiau durcissant sous l'action d'un rayonnement electromagnetique, notamment d'une peinture uv ou d'une peinture a durcissement thermique
DE102007012897A1 (de) 2007-03-17 2007-11-29 Daimlerchrysler Ag UV-Belichtungsraum

Also Published As

Publication number Publication date
DE102008058327A1 (de) 2010-11-25
DE102008058327B4 (de) 2012-10-18
EP2189227B1 (fr) 2011-09-07
ATE523264T1 (de) 2011-09-15

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