EP1400287A1 - Appareil pour durcir des revêtements durcissables par exposition aux UV - Google Patents

Appareil pour durcir des revêtements durcissables par exposition aux UV Download PDF

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Publication number
EP1400287A1
EP1400287A1 EP03020307A EP03020307A EP1400287A1 EP 1400287 A1 EP1400287 A1 EP 1400287A1 EP 03020307 A EP03020307 A EP 03020307A EP 03020307 A EP03020307 A EP 03020307A EP 1400287 A1 EP1400287 A1 EP 1400287A1
Authority
EP
European Patent Office
Prior art keywords
radiation
irradiation
radiation sources
module
illuminance
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
EP03020307A
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German (de)
English (en)
Other versions
EP1400287B1 (fr
Inventor
Reiner Dr. Mehnert
Axel Sobottka
Herbert Lange
Hartmut Krannich
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.)
Cetelon Lackfabrik GmbH
Original Assignee
Cetelon Lackfabrik Walter Stier GmbH and Co KG
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Publication of EP1400287A1 publication Critical patent/EP1400287A1/fr
Application granted granted Critical
Publication of EP1400287B1 publication Critical patent/EP1400287B1/fr
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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 present invention relates to a device for curing radiation-curable coatings which has at least one radiation chamber provided with a plurality of UV radiation sources has, in particular of flat or three-dimensional provided with such coatings Substrates.
  • the curing of radiation-curable coatings by high-energy UV radiation is known, for example using medium-pressure mercury lamps or UV excimer lamps (R. Mehnert et al., UV ⁇ t EB Technology and Application, SITA Valley, London 1998).
  • the specific electrical power of these lamps is typically between 50 and 240 W per cm of lamp length. With a lamp length of 1 m, the electrical power converted is between 5 and 24 kW.
  • These high-performance emitters are primarily used for the curing of coatings on flat substrates. Typical illuminance levels of 100 to 1000 mW / cm 2 are measured on the layer to be cured. This makes it possible to achieve curing times of 100ms and less.
  • Such a system is known, for example, from DE 24 25 217 A1.
  • a generic device is also, for example, from WO 96/34700 A1 and FR 2 230 831 A1 known.
  • UV lamps Because of the biological effects of UV rays, there are extensive shielding and others Protective measures are required if these UV lamps are used. For curing coatings on three-dimensional objects such. For example, individual UV lamps in closed form Appropriate rooms that adequate radiation protection can be granted. A sufficiently homogeneous irradiation of the coatings to be hardened on three-dimensional substrates however, is practically impossible. The energy expenditure for hardening is therefore through the effort required for the hardening of layer areas determined only by obliquely incident Radiation or scattered radiation can be achieved.
  • the object of the present invention is therefore to provide a generic device to provide suitable for the treatment of both flat and three-dimensional substrates is in which the energy expenditure is reduced and in the case of complex radiation and heat protection measures can be dispensed with.
  • the solution is that several UV radiation sources are arranged close together and are connected together to form one or more radiation modules, the illuminance within an irradiation module and / or between at least two irradiation modules is spatially variable.
  • the device consists of geometrically suitable arrangements is built up by several radiation sources lying close together. Any of these arrangements is called an irradiation module.
  • a radiation module a flat area is used here Arrangement of radiation sources arranged close to each other (e.g. with a common electrical supply) understood.
  • the enveloping area of the radiation sources each Module can be flat or curved.
  • Irradiation modules can be built up, the light focus into a selected, even curved, radiation plane and a geometrically extensive one enable homogeneous irradiation of the substrate surfaces.
  • the structure is thus such that inside the radiation chamber in which the radiation-curable Coatings are cured, a spatially variable illuminance is set is that the coating to be hardened is hardened homogeneously, without a disturbing Heat is introduced into the coating and / or substrate.
  • the variation can be done by setting the enveloping surfaces of the radiation sources of a single module and on the other hand due to the spatial arrangement of the radiation modules in the device, a large number of geometric arrangements can be implemented. Due to the modular structure the device can thus be adapted to the geometry of the substrate to be treated, so that the energy expenditure is reduced. This also has the consequence that biological radiation protection is simplified, i.e. can be limited, for example, to measures such as those for use of tanning lamps apply.
  • lamps preferably fluorescent tubes, of low electrical power, from about 0.1 to 10 W per cm of radiator length, which, for example, has a continuous emission spectrum between 200 and 450 nm, preferably between 300 and 450 nm. Because the heat is lower than with high-performance UV lamps, it is sufficient to have their surface, for example to cool an air stream.
  • Such lamps are known per se and are used, for example, as tanning lamps in solariums. With a specific power of, for example, 1 W per cm of lamp length and the resulting As such, these lamps are low illuminance per se and not for technical purposes Applications suitable for curing radiation-curable coatings.
  • Such lamps which are typically provided with reflectors with beam angles of, for example, approx. 160 °, in which Usually have standardized dimensions (diameter of the tubes approx. 25 to 45 cm, light length up to approx. 200 cm) and operated at an operating voltage of 220 V are very good suitable as radiation sources for the aforementioned radiation modules. This applies in particular the reflectors, which simplify focusing in the desired radiation level. Advantageous is also their high photon yield of approx. 30% of the electrical power.
  • illuminance levels typically about 20 mW / cm 2 are achieved, for example, at a distance of 10 cm from the radiation source. Although these illuminance levels are 5 to 50 times smaller than those achievable with conventional UV lamps, they are sufficient to cure coatings at irradiation times of approximately 30 to 300 s.
  • At least one radiation module at least one of its three spatial axes is movably arranged in the device. This makes it easier the geometric adaptation to the substrate and the focusing of the beams in the desired Irradiation plane.
  • Illuminance levels through the interconnection of suitable radiation sources to form radiation modules are achieved, in particular then for the curing of the radiation-curing Coating sufficient if hardening under an inert protective gas such as nitrogen he follows.
  • an inert protective gas such as nitrogen he follows.
  • the implementation of radiation curing under protective gas is known per se and, for example, in DE 199 57 900 A1, EP 540 884 A1 and in the publications mentioned above.
  • the structure of the radiation module 10 according to the invention is exemplarily based on that in the figures 1 and 2 shown embodiment.
  • the components are on a base plate 11, assembled.
  • the base plate 11 is preferably made of a metal such as aluminum or Steel or a metal alloy and has on the back the necessary electrical Connections 13 and possibly a bracket 12.
  • devices for installing the Irradiation module 10 in irradiation systems and devices for moving the irradiation module 10 may be provided.
  • the starter and connections for are also on the base plate UV radiation sources 18 mounted.
  • Cross-flow fans for example, are suitable for this purpose.
  • a frame 14 is also provided, within which the Ventilation 16 and the UV radiation sources 18 are installed.
  • Suitable UV radiation sources 18 are, for example, fluorescent tubes as are used as tanning lamps in solariums.
  • fluorescent tubes generally have standardized dimensions, for example a light length of 2 m with a diameter of 25 to 45 cm. They can also be provided with reflectors, which have a radiation angle of approximately 160 °, for example.
  • These fluorescent tubes are used in one Operating voltage of 220 V.
  • the frame 14 with the ventilation 16 and the UV radiation sources 18 is airtight on three sides from a UV-permeable plate 15, for example made of plastic, such as polymethyl methacrylate or Polycarbonate, enclosed.
  • the surface of the plate 15 forms the front of the radiation module 10, as illustrated by the arrow A symbolizing the direction of radiation.
  • One or more radiation modules 10 are installed in a closed radiation vessel.
  • the irradiation vessel encloses an irradiation space which is at least one Irradiation module is illuminated.
  • FIG. 3 schematically shows an exemplary embodiment for a device 10 according to the invention discontinuous irradiation of substrates.
  • a rectangular one provided with feet 21 Containers with a length of 2.10 m, a width of 80 cm and a height of 80 cm were made with four 1.50 m long, with 10 radiation modules 10 provided with planar fluorescent tubes 18.
  • the Irradiation modules 10 were placed on the bottom of the container, the sides and the lid of the container attached. The upper radiation module can be lifted with the lid of the container.
  • the fluorescent tubes 18 in the radiation modules 10 were cooled by cross-flow fans.
  • the tops of the plates 15 of the radiation modules define and enclose a rectangular one Irradiation room 22 of 1.60 m long, 60 cm wide and 40 cm high.
  • a rectangular one Irradiation room 22 of 1.60 m long, 60 cm wide and 40 cm high.
  • the radiation room 22 there are also four laterally arranged tubes 23 each with 40 holes for Intake of nitrogen.
  • Such a device 20 can be operated as follows.
  • the coated substrates are introduced into the radiation room 22. Thereafter, the irradiation room 22 with inert gas flooded.
  • an oxygen concentration of 5%, preferably 1%, is particularly preferred 0.1% the irradiation is started and ended after the layer has hardened.
  • the duration the irradiation is typically about 30 to 300 s.
  • the device according to the invention in particular for curing coatings on moldings. They allow the application of radiation curing e.g. For example in the craft area for production and repair.
  • the moderate electrical connected load of the modules is advantageous, which is typically 1 to 2 kW.
  • a car rim was coated on all sides with a radiation-curing spray paint as the molded body.
  • the rim was provided with a holder at the valve hole and hung in the irradiation room 22. After the radiation chamber 22 was closed, it was flooded with nitrogen. The concentration of the oxygen was measured and displayed with a sensor in the radiation room 22. After 2 minutes flooding with a nitrogen flow of 60 m 3 / h, an oxygen concentration of less than 0.1% was reached. After reaching this value, the nitrogen flow was reduced to 10 m3 / h and the irradiation started. After an irradiation time of 2 minutes, the nitrogen was turned off and the device 20 was opened. The paint on the rim was hardened in all places and could not be damaged even under manual pressure.
  • an irradiation tunnel 30 can also be constructed using the described radiation modules 10 be as it is shown schematically in Figure 4.
  • the radiation modules 10 are arranged on the sides and on the top so that they are one Define and enclose tunnel-shaped irradiation room 32. In it z.
  • coated substrates are cured during the run.
  • the lighting length of the radiation room 32 up to 4 m. If the curing takes place within about 30 to 300 s, the throughput speeds are from 0.8 to 8 m / min possible. It should be noted that during the Pass and the radiation the residual oxygen concentration should be sufficiently low.
  • Atmospheric oxygen should not exceed the limit of 5%. Therefore are advantageous locks and / or suitable nozzles for feeding, especially in the direction of conveyance in front of the radiation zone of inert gas, preferably nitrogen, are provided, which prevent the swirling of air.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Apparatus (AREA)
  • Polymerisation Methods In General (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
EP03020307A 2002-09-13 2003-09-09 Appareil pour durcir des revêtements durcissables par exposition aux UV Expired - Lifetime EP1400287B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10242719A DE10242719A1 (de) 2002-09-13 2002-09-13 Vorrichtung zur Härtung strahlungshärtbarer Beschichtungen
DE10242719 2002-09-13

Publications (2)

Publication Number Publication Date
EP1400287A1 true EP1400287A1 (fr) 2004-03-24
EP1400287B1 EP1400287B1 (fr) 2006-12-06

Family

ID=31724756

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03020307A Expired - Lifetime EP1400287B1 (fr) 2002-09-13 2003-09-09 Appareil pour durcir des revêtements durcissables par exposition aux UV

Country Status (6)

Country Link
US (1) US7089686B2 (fr)
EP (1) EP1400287B1 (fr)
AT (1) ATE347452T1 (fr)
CA (1) CA2440574A1 (fr)
DE (2) DE10242719A1 (fr)
ES (1) ES2277008T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106739465A (zh) * 2016-12-19 2017-05-31 上海舜哲机电科技有限公司 一种led芯片

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004029667A1 (de) 2003-09-04 2005-04-07 Cetelon Lackfabrik Walter Stier Gmbh & Co.Kg Verfahren und Vorrichtung zur Härtung einer strahlenhärtbaren Beschichtung sowie Bestrahlungskammer
US20050109463A1 (en) * 2003-10-07 2005-05-26 Uv-Tek Products Limited Photo reactive thermal curing unit and apparatus therefor
DE102007012897A1 (de) 2007-03-17 2007-11-29 Daimlerchrysler Ag UV-Belichtungsraum
DE102008046548B4 (de) * 2008-09-10 2012-12-06 Daimler Ag Belichtungskammer für die Aushärtung strahlungshärtender Beschichtungen sowie Härtungsanlage für Kraftfahrzeugkarosserien
KR101860631B1 (ko) * 2015-04-30 2018-05-23 시바우라 메카트로닉스 가부시끼가이샤 기판 처리 장치 및 기판 처리 방법
US11142012B2 (en) * 2016-05-25 2021-10-12 Xerox Corporation Removable dryer module for a printing apparatus
KR102179827B1 (ko) * 2018-08-06 2020-11-17 곽주현 경화 장치
US11619399B1 (en) 2021-09-22 2023-04-04 William H. White Systems and methods for direct use of solar energy

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3767457A (en) * 1971-11-19 1973-10-23 Grace W R & Co Method of coating rigid cores
US4095113A (en) * 1975-08-26 1978-06-13 Friedrich Wolff Apparatus for producing ultraviolet radiation
US4490410A (en) * 1983-05-20 1984-12-25 Showa Highpolymer Co., Ltd. Method of affixing a decorative pattern to a stock or a molded component
FR2598921A1 (fr) * 1986-05-26 1987-11-27 Dixwell Dispositif et procede de phototherapie
US5387801A (en) * 1993-06-10 1995-02-07 Uvp, Inc. Multiple wavelength light source
DE29605835U1 (de) * 1996-03-29 1997-07-24 Lohmann Werke Gmbh & Co Bestrahlungsgerät
DE19611763A1 (de) * 1996-03-26 1997-10-02 Uwe Unterwasser Electric Gmbh Bestrahlungsgerät
DE19810201A1 (de) * 1998-03-10 1999-09-16 Thomas Danhauser Kombinations-Bräunungsstuhl

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
US4143278A (en) * 1977-05-16 1979-03-06 Geo. Koch Sons, Inc. Radiation cure reactor
DE4133290A1 (de) 1991-10-08 1993-04-15 Herberts Gmbh Verfahren zur herstellung von mehrschichtlackierungen unter verwendung von radikalisch und/oder kationisch polymerisierbaren klarlacken
JP3150746B2 (ja) 1992-03-06 2001-03-26 大阪酸素工業株式会社 立体構造物の表面に樹脂被膜を形成するための装置
IL113904A0 (en) * 1994-06-10 1995-08-31 Johnson & Johnson Vision Prod Mold clamping and precure of a polymerizable hydrogel
DE59603722D1 (de) 1995-05-04 1999-12-30 Noelle Gmbh Vorrichtung zum härten einer schicht auf einem substrat
US5655312A (en) * 1995-10-02 1997-08-12 Fusion Uv Systems, Inc. UV curing/drying apparatus with interlock
US5634402A (en) * 1995-10-12 1997-06-03 Research, Incorporated Coating heater system
US5713138A (en) * 1996-08-23 1998-02-03 Research, Incorporated Coating dryer system
DE19957900A1 (de) 1999-12-01 2001-06-07 Basf Ag Lichthärtung von strahlungshärtbaren Massen unter Schutzgas

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3767457A (en) * 1971-11-19 1973-10-23 Grace W R & Co Method of coating rigid cores
US4095113A (en) * 1975-08-26 1978-06-13 Friedrich Wolff Apparatus for producing ultraviolet radiation
US4490410A (en) * 1983-05-20 1984-12-25 Showa Highpolymer Co., Ltd. Method of affixing a decorative pattern to a stock or a molded component
FR2598921A1 (fr) * 1986-05-26 1987-11-27 Dixwell Dispositif et procede de phototherapie
US5387801A (en) * 1993-06-10 1995-02-07 Uvp, Inc. Multiple wavelength light source
DE19611763A1 (de) * 1996-03-26 1997-10-02 Uwe Unterwasser Electric Gmbh Bestrahlungsgerät
DE29605835U1 (de) * 1996-03-29 1997-07-24 Lohmann Werke Gmbh & Co Bestrahlungsgerät
DE19810201A1 (de) * 1998-03-10 1999-09-16 Thomas Danhauser Kombinations-Bräunungsstuhl

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106739465A (zh) * 2016-12-19 2017-05-31 上海舜哲机电科技有限公司 一种led芯片

Also Published As

Publication number Publication date
US7089686B2 (en) 2006-08-15
ATE347452T1 (de) 2006-12-15
EP1400287B1 (fr) 2006-12-06
DE10242719A1 (de) 2004-03-18
DE50305889D1 (de) 2007-01-18
ES2277008T3 (es) 2007-07-01
CA2440574A1 (fr) 2004-03-13
US20040111914A1 (en) 2004-06-17

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