WO2002026406A1 - Procede de realisation d'un produit exempt d'impuretes superficielles - Google Patents

Procede de realisation d'un produit exempt d'impuretes superficielles Download PDF

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Publication number
WO2002026406A1
WO2002026406A1 PCT/EP2001/011181 EP0111181W WO0226406A1 WO 2002026406 A1 WO2002026406 A1 WO 2002026406A1 EP 0111181 W EP0111181 W EP 0111181W WO 0226406 A1 WO0226406 A1 WO 0226406A1
Authority
WO
WIPO (PCT)
Prior art keywords
radiation
coating material
contamination
infrared radiation
temperature
Prior art date
Application number
PCT/EP2001/011181
Other languages
German (de)
English (en)
Inventor
Kai K. O. BÄR
Rainer Gaus
Rolf Grill
Rolf Wirth
Original Assignee
Advanced Photonics Technologies 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
Priority claimed from DE10058027A external-priority patent/DE10058027A1/de
Application filed by Advanced Photonics Technologies Ag filed Critical Advanced Photonics Technologies Ag
Priority to AU2002212286A priority Critical patent/AU2002212286A1/en
Publication of WO2002026406A1 publication Critical patent/WO2002026406A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B01J19/12—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electromagnetic waves
    • B01J19/122—Incoherent waves
    • B01J19/128—Infrared light
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B08B7/0035—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B08B7/0064—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by temperature changes
    • B08B7/0071—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by temperature changes by heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B01J2219/0873—Materials to be treated
    • B01J2219/0879—Solid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B2220/00—Type of materials or objects being removed
    • B08B2220/04—Polymers

Definitions

  • the invention relates to a method for producing a product free of surface contamination according to the preamble of patent claim 1 and a device for removing contaminants from a surface by heating by means of radiation according to the preamble of patent claim 19.
  • Processes for cleaning surfaces are known in a wide variety and range from purely abrasive processes, such as sandblasting, to processes in which solvents are used to remove impurities, and processes that burn off, evaporate or sublimate the contaminant from a body using heat.
  • Another disadvantage of the aforementioned methods is that they are generally not suitable for the selective removal of contaminants, in which an area around the contaminant should or may remain untreated in its original state.
  • the object of the invention is to provide a gentle, efficient and flexibly usable method for producing a product free of surface impurities and an apparatus for carrying out such a method, the method being independent of the thermal and / or mechanical resistance of the body or product.
  • a preferred embodiment of the invention is based on the fact that an infrared radiation source, in particular a high-performance halogen lamp, is used, the emission temperature of which is at least 2500 K and preferably more than 2900 K, the wavelengths emitted in this case in the range from 0.6 to 2, 5 ⁇ m, preferably in the range between 0.7 ⁇ m to 2.0 ⁇ m and particularly preferably in the range from 0.8 ⁇ m to 1.5 ⁇ m.
  • an infrared radiation source in particular a high-performance halogen lamp
  • the radiation energy striking the surface contamination in this spectral range is set sufficiently to remove the contamination in a very short time, i. H. in fractions of a second up to a maximum of a few seconds to heat up to a temperature above their boiling, sublimation or combustion temperature.
  • the background and areas surrounding the surface contamination of the product to be cleaned remain largely unaffected by the irradiated NIR radiation due to their absorption characteristics which are different with respect to the surface contamination and the extremely short treatment time and are therefore essentially “cold”.
  • the wavelength range used to excite the surface contamination can be precisely matched to its absorption characteristics and thus optimized for them by varying the emission temperature.
  • the emitted spectrum of the NIR radiation can also be set so that it is not primarily the contamination itself, but the outer surface layer that is heated.
  • This embodiment is intended to illustrate that it is with the inventive method it is possible to selectively and gently remove surface contaminants from the surface to be cleaned, the range of process options ranging from a slight heating of the surface to the evaporation of volatile substances to the use of one or more focusing devices for selectively increasing one on the surface radiated energy density is sufficient for proper burning and can be individually adjusted.
  • a focusing device for increasing an energy density radiated onto the surface is used to further shorten the time required for heating the impurity.
  • a plurality of infrared radiation sources are provided, so that the energy density impinging on the surface contamination can be increased both in a larger area and selectively as required.
  • a first delimited radiation area is provided on the device side, into which a body to be cleaned is introduced and NIR radiation is irradiated.
  • the first dergrenz ⁇ te radiation area is defined by at least one NIR radiation source and at least a reflector which can be formed as focusing means.
  • a suction device is provided in the region of the first radiation region for receiving contaminants which have been evaporated or otherwise released. This prevents accumulation of contaminants.
  • the type of contamination is determined before and in particular during the irradiation. Cleaning and / or a degree of contamination of the surface, preferably optically, in particular by measuring the absorption properties.
  • the absorption properties of the body are used to infer the type of contamination and its nature, such as in particular the type of coating and the layer thickness, and the energy density and wavelength necessary to remove the contamination in coordination with the characteristics of contamination.
  • the process steps of determining the, in particular optical, properties of the body and of the contamination and of coordinating the radiation characteristics to be used to remove the contamination can be controlled, in particular regulated, manually or (preferably) automatically.
  • the method is particularly suitable for stripping, in particular for removing a powder coating from a surface coated with it.
  • the present invention is cleaned surface ATE rials, by applying a coating preferably immediately following the removal of the contaminant to the heated means of the NIR radiation ⁇ upper surface refined.
  • a coating preferably immediately following the removal of the contaminant to the heated means of the NIR radiation ⁇ upper surface refined.
  • essentially the same infrared radiation with essentially the same radiation characteristics in the aforementioned wavelength range is used to remove the impurities and to apply the coating material.
  • this is solved by defining a second delimited irradiation area for applying the coating material, which, however, stretch and its radiation characteristics can essentially correspond to the first radiation range.
  • the same or the same infrared radiation source (s) are provided for irradiating the first and second irradiation areas.
  • the emission characteristics of the infrared radiation sources are adapted to the respective needs. It is also possible to use different NIR radiation sources which can be switched alternately or in a complementary manner.
  • different NIR radiation sources are provided for irradiating the first and second irradiation areas, each of which can be individually controlled, in particular regulated, with regard to their emission characteristics. This has the advantage that different wavelengths and / or radiation intensities can be used to remove surface contamination and to apply coating material.
  • a body to be cleaned by means of a transport device eg. B. a conveyor belt, first introduced into the first radiation area to remove its contaminants, and immediately afterwards is conveyed into the second radiation area to apply a coating, where the adhesion and / or gelling of the coating material is initiated by NIR radiation ,
  • thermoreactive coating material such as, for example, a thermoreactive one
  • thermoreactive powder or a thermoreactive granulate which, depending on the type, is applied to the surface in a radiation zone or in the vicinity of a radiation zone by spraying on, spraying on or shooting on. It is also possible to apply the coating material (if it is a powder) as a falling film, this application taking place either directly in an irradiation zone or in the vicinity of an irradiation zone.
  • the devices required for applying the coating can be arranged both in, but preferably outside, an irradiation zone, cooling of the device being provided when arranged within the irradiation zone.
  • the coating device is preferably arranged in such a way that the beam path for the infrared radiation is not impaired and there is essentially no radiation absorption or beam scattering on the coating device.
  • the radiation characteristics, in particular radiation flux density and optionally also wavelength, are matched to the coating parameters, such as, in particular, the intended layer thickness and the coating material, with adhesion of the coating material to the surface being initiated by the infrared radiation.
  • the NIR radiation is suitable for causing crosslinking and / or curing of the coating material on the surface, if this is desired or corresponds to the chemistry of the coating material.
  • certain areas of the surface to be cleaned or of the surface to be coated are intensified with infrared radiation of a possibly additional NIR Radiation source, are irradiated so that, for example, "stubborn * contaminants can be irradiated with a higher energy density. It is also possible, for example, to emboss a pattern into a coating material by means of focused infrared radiation, which is retained after the coating has been completed.
  • a control device for the radiation flux density is provided.
  • An adjustable focusing or distance adjusting device is particularly suitable for this, but also a device for adjusting the current and / or voltage supply to the NIR lamp. With regard to an exact wavelength setting in particular, it is possible to provide appropriate filters.
  • surface means any surface, for example the surface of an amorphous body or that of a powder.
  • a non-contact temperature measuring device for example a pyrometer, is provided for measuring the surface temperature.
  • a cooling device is provided according to the device for cooling at least parts of the device which are exposed to infrared radiation.
  • the cooling device is also advantageously suitable for cooling the surface and / or the coating. This is particularly advantageous when it is necessary to use high radiation energies in order to avoid heating the surface due to thermal conduction, in particular if the surface is sensitive to heat. The same applies to coatings, especially in the case of thick Stratification is advantageously avoided by rapid cooling.
  • a radiation-cleaned, in particular heat-sensitive, body which is produced by the method according to the invention is claimed.
  • heat-sensitive bodies such as paper, filled pressure cans, canisters and the like bodies, which would suffer damage from heating, by selective heating of the contaminants, but not the surface of the body ,
  • such bodies can then be provided with a coating, in particular with a powder coating, again only the coating, but not the body itself, being excited by means of infrared radiation.
  • the method is suitable for externally removing impurities from a completely filled, pressurized container and subsequently providing it with a coating. Due to the very high, but only very short-term heating of the impurities that disturb an immediate coating, the body is not damaged according to the method. It is not necessary to empty the container beforehand.
  • the container is placed in a first radiation area, the focusing area of the NIR Radiation by reflectors or a plurality of NIR radiation sources is adapted to the outer contour of the container, for example in the case of a can it is designed in a ring shape.
  • This ring-shaped focusing area of the NIR radiation scans the container from top to bottom, only a small area of the container being irradiated in each case.
  • a coating material is, for example, injected obliquely from above into the focusing area of the NIR radiation and immediately fixed by the NIR radiation, while the coating and irradiation device moves upward with respect to the container.
  • the device, and in particular the body is flushed with a cooling gas, preferably inert cooling gas.
  • a metallic component is cleaned from a corrosion-protecting surface coating, such as, for example, an oil, so that subsequent processing, for example welding while avoiding combustion residues containing oil, is avoided.
  • a corrosion-protecting surface coating such as, for example, an oil
  • the metal part is passed through a first irradiation area.
  • this is advantageously done with the aid of an assembly line that conveys the metal part to be cleaned through the first irradiation area.
  • the evaporation products are advantageously removed from the cleaning area with the aid of a suction device, so that the same is prevented from being deposited again.
  • a powder for example a different color, can be applied to the surface and specifically irradiated with NIR radiation only at the previously cleaned locations, so that a two-colored or multi-colored pattern is produced. In this way, it is possible at any time to take subsequent design or corrective measures on the other finished products.

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  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Optics & Photonics (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)

Abstract

L'invention concerne un dispositif et un procédé pour réaliser un produit exempt d'impuretés superficielles par chauffage de la surface et/ou des impuretés jusqu'à une température supérieure à la température d'ébullition, de sublimation ou de combustion des impuretés, par irradiation, notamment à l'aide d'infrarouges dont des composantes importantes se trouvent dans l'infrarouge proche. Le dispositif utilisé présente une zone d'irradiation définie par une source de rayonnement et par un réflecteur, zone dans laquelle peut être amenée la surface à purifier.
PCT/EP2001/011181 2000-09-29 2001-09-26 Procede de realisation d'un produit exempt d'impuretes superficielles WO2002026406A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002212286A AU2002212286A1 (en) 2000-09-29 2001-09-26 Method for producing a product from whose surface foreign matter can be removed

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10048358 2000-09-29
DE10048358.5 2000-09-29
DE10058027.0 2000-11-23
DE10058027A DE10058027A1 (de) 2000-09-29 2000-11-23 Verfahren zur Herstellung eines von Oberflächenverunreinigungen freien Produktes

Publications (1)

Publication Number Publication Date
WO2002026406A1 true WO2002026406A1 (fr) 2002-04-04

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ID=26007217

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2001/011181 WO2002026406A1 (fr) 2000-09-29 2001-09-26 Procede de realisation d'un produit exempt d'impuretes superficielles

Country Status (3)

Country Link
AU (1) AU2002212286A1 (fr)
DE (1) DE20020547U1 (fr)
WO (1) WO2002026406A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006027690A2 (fr) * 2004-09-10 2006-03-16 Carlo Devittori Dispositif et procede pour la separation et/ou la mesure des residus sur les surfaces des produits de la mecanique

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0916366D0 (en) * 2009-09-18 2009-10-28 Techlan Ltd Method of removal of resin residue

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2638663A1 (fr) * 1988-11-09 1990-05-11 Christian Lumpp Procede pour l'enduction d'une tole metallique
EP0369477A2 (fr) * 1988-11-17 1990-05-23 Columbus System Patent Ag Procédé et appareil pour enduire une tôle avec une peinture en poudre
US5656096A (en) * 1993-05-25 1997-08-12 Polygon Industries, Inc. Method for photopyrolitically removing a contaminant
ES2114491A1 (es) * 1996-05-16 1998-05-16 Talco S L Sistema de limpieza y/o tratamiento de superficies.
DE19823163A1 (de) * 1998-05-23 1999-05-06 Bundesrep Deutschland Vorrichtung zur C-Dekontamination von Gegenständen
US6028316A (en) * 1996-08-28 2000-02-22 New Star Lasers, Inc. Method and apparatus for removal of material utilizing near-blackbody radiator means

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2638663A1 (fr) * 1988-11-09 1990-05-11 Christian Lumpp Procede pour l'enduction d'une tole metallique
EP0369477A2 (fr) * 1988-11-17 1990-05-23 Columbus System Patent Ag Procédé et appareil pour enduire une tôle avec une peinture en poudre
US5656096A (en) * 1993-05-25 1997-08-12 Polygon Industries, Inc. Method for photopyrolitically removing a contaminant
ES2114491A1 (es) * 1996-05-16 1998-05-16 Talco S L Sistema de limpieza y/o tratamiento de superficies.
US6028316A (en) * 1996-08-28 2000-02-22 New Star Lasers, Inc. Method and apparatus for removal of material utilizing near-blackbody radiator means
DE19823163A1 (de) * 1998-05-23 1999-05-06 Bundesrep Deutschland Vorrichtung zur C-Dekontamination von Gegenständen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006027690A2 (fr) * 2004-09-10 2006-03-16 Carlo Devittori Dispositif et procede pour la separation et/ou la mesure des residus sur les surfaces des produits de la mecanique
WO2006027690A3 (fr) * 2004-09-10 2006-06-15 Carlo Devittori Dispositif et procede pour la separation et/ou la mesure des residus sur les surfaces des produits de la mecanique

Also Published As

Publication number Publication date
AU2002212286A1 (en) 2002-04-08
DE20020547U1 (de) 2001-06-13

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