EP2926951B1 - Procédé de nettoyage et d'activation simultanés de surfaces de composants par une combinaison de pulvérisation de neige carbonique et d'application de substances adhésives - Google Patents

Procédé de nettoyage et d'activation simultanés de surfaces de composants par une combinaison de pulvérisation de neige carbonique et d'application de substances adhésives Download PDF

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Publication number
EP2926951B1
EP2926951B1 EP14163007.9A EP14163007A EP2926951B1 EP 2926951 B1 EP2926951 B1 EP 2926951B1 EP 14163007 A EP14163007 A EP 14163007A EP 2926951 B1 EP2926951 B1 EP 2926951B1
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EP
European Patent Office
Prior art keywords
carbon dioxide
nozzle
substance
air
adhesion
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
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EP14163007.9A
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German (de)
English (en)
Other versions
EP2926951A1 (fr
Inventor
Paul Ludwig Prof. Dr.-Ing. Geiß
Juliane Elsäßer
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.)
Technische Universitat Kaiserslautern
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Technische Universitat Kaiserslautern
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Priority to EP14163007.9A priority Critical patent/EP2926951B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/003—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods using material which dissolves or changes phase after the treatment, e.g. ice, CO2
    • 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
    • B08B7/0021—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by liquid gases or supercritical fluids
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents

Definitions

  • adhesion-promoting substances is of great importance for the bonding and coating of components.
  • the removal of interfering surface layers and / or contaminations and the use of adhesion promoters contribute significantly to the improvement of the long-term stability of bonds and coatings under damaging environmental effects.
  • Known methods for cleaning and / or activating component surfaces are, for example, grinding [ EP 1239017 B1 ] or compressed air blasting [ DE3802043 C1 ], chemical etching (pickling) [ DE3427543A1 ], chemical conversion methods [ US 3907609 . DE19654642C2 ], electrochemical conversion processes (eg anodizing) [ US 4473446 ] and / or the application of adhesion-promoting and adhesion-improving coatings [ WO / 1997/005077 . WO 2000039356 A1 ].
  • Patents US5814137 and US 6037060 relate to surface treatment methods for producing sol-gel films which adhere to the surfaces by means of covalent bonds and can be used to produce long-lasting adhesive bonds between metals and organic adhesives.
  • DE 3802043 C1 describes a method for blasting metal surfaces, in which a blasting agent modified with silicon-containing compounds is used in combination with a subsequent application of silane-based adhesion promoters.
  • US 3364056 is the admixture of halogen compounds to the fuel gas for the flame treatment of Polyolefinober lake known.
  • the DE 102006045951 A1 relates to a process for the chemical modification and / or activation of component surfaces, in which the supply of the halogen-containing compounds with simultaneous addition of organosilicon compounds is carried out by using at least one carrier medium which serves to supply energy to the surface and feeds the surface to one or more halogen-containing compounds Compounds or silanes or organometallic compounds or silicon hybrids or metal hybrids in the carrier medium takes place.
  • EP 2 151 300 B1 WO 03/022525 A1 and WO 2004/033154 A1 describes how the jet power can be increased by adding abrasive substances, additives and liquids, but the combination with adhesion-promoting substances is not described there.
  • the EP 2 008 770 A1 describes a process for cleaning molds for plastic molding in which dry ice is blasted onto a surface to be cleaned together with a release agent. The dry ice is conveyed by means of compressed air through a compressed air line, which has a nozzle ring. Through the nozzles of the nozzle ring, the release agent is supplied to the stream of compressed air and dry ice.
  • the release agent is either integrated into the dry ice and / or attached to the dry ice or mixed with the liquid carbon dioxide or with solid dry ice and then used for surface treatment.
  • the release agent is already supplied to the compressed air before mixing with liquid or solid carbon dioxide.
  • the solid surface should be provided with a release layer. No adhesion-promoting effect for bonding or coating is sought.
  • the invention therefore relates to a method for the simultaneous cleaning and activation of component surfaces by a combination of carbon dioxide snow jets and the application of adhesion-promoting substances.
  • the surface of a component is thereby pretreated for subsequent technical applications, in particular gluing or coating, and the long-term stability of bonds and coatings under damaging environmental influences is thereby improved.
  • the invention is based on the fact that an adhesion-promoting substance is applied to the surface by the carbon dioxide snow blasting process.
  • carbon dioxide is passed in the liquid state in a nozzle upstream agglomeration chamber and by the relaxation in the chamber formed carbon dioxide snow particles.
  • These carbon dioxide snow particles are bundled by a jet of super-fast compressed air and accelerated in the direction of the surface to be treated.
  • the super-fast compressed air is supplied before flowing into the agglomeration chamber an adhesion-promoting substance, which is applied with the carbon dioxide snow particles on the surface to be treated.
  • the adhesion-promoting substance used in the context of the invention has, in particular, adhesion-promoting, anti-corrosive or hydrophobizing properties and can be adapted to subsequent adhesive or coating processes.
  • Such substances which can be applied in thin layers are familiar to the person skilled in the field of surface pretreatment and, depending on the respective requirements for the adhesion-promoting effect, in particular taking into account subsequent further processing operations, selects or mixes a suitable substance from existing ones New components.
  • the adhesion-promoting substance is supplied to the stream of compressed air and swirled in this jet.
  • the multicomponent mixture produced from the carbon dioxide snow particles and the substance is accelerated by the compressed air flow in the nozzle and the carbon dioxide snow particles clean when impinging on the surface of a component that of impurities in a known manner. Since the carbon dioxide snow particles change directly from the solid state of aggregation to the gaseous state under atmospheric pressure, only the adhesion-promoting substance remains on the blasted or cleaned surface. Upon impact of the mixture creates a balance between the cleaning of the surface and the application of the substance used. Excess or not adhering to the surface substance is due to the cleaning effect of the carbon dioxide snow particles removed again, so that the application of thin layers (in the nanometer range) of the substance is possible.
  • the liquid carbon dioxide is metered into the compressed air stream and the surface-activating or functionalizing substance in a relaxation space, the so-called agglomeration chamber.
  • This design of the method allows a uniform distribution of carbon dioxide snow particles and the substance, since it comes through the turbulence in the agglomeration chamber to a mixing of the media to a multi-substance mixture.
  • the feeding of the substance into the compressed air stream avoids a freezing of the delivery line of the liquid carbon dioxide.
  • the use of liquid carbon dioxide is advantageous in that the costly storage of dry ice is eliminated and the carbon dioxide snow particles are generated directly during the blasting process.
  • the substance is supplied to the compressed air immediately before entering the nozzle.
  • a container stockpiling the substance can, for example, in the immediate Are placed near the nozzle or the device for steeling, which is why transport-related damage to the substance can be avoided and the energy to convey the substance is relatively low.
  • the substance is preferably supplied to the compressed air using a metering pump.
  • the supply of the substance can be carried out in a constant volume flow or under constant pressure.
  • the compressed air is supplied as a substance, an adhesion promoter or a mixture of adhesion promoter and solvent.
  • the nozzle is followed by an air nozzle.
  • a hot air stream is discharged from the air nozzle.
  • the locally acting on the surface of the workpiece warm air flow promotes the attachment of the substance to the surface, which is dry after the treatment and can be subjected to further processing.
  • An apparatus for carrying out the above-described blasting method comprises a supply of liquid carbon dioxide, which is connected via a line with at least one agglomeration chamber of a nozzle body of a nozzle.
  • the agglomeration chamber of the nozzle body is preceded by an access which is connected via a supply line with compressed air and a container for a surface-activating and / or heatnfunktional expectde substance in flow communication.
  • the carbon dioxide snow particles may form and mix with the substance introduced into the stream of compressed air to be applied together through the nozzle to the surface to be processed.
  • the jet of super-fast compressed air as the substance for example, a bonding agent, preferably silane, or a mixture of silane and solvent supplied. Accordingly, impurities are removed from the surface to be processed without time delays and at the same time the adhesion-promoting substance is applied to the surface.
  • the feed line is preferably connected to a metering pump for the substance.
  • the metering pump with respect to their volume and / or pressure control is adjustable.
  • a controllable handling device is required for the automated guidance of the nozzle.
  • an air nozzle is provided in an embodiment whose effective direction corresponds to the discharge of the nozzle.
  • the air nozzle may be coupled to the nozzle or its nozzle body and be tracked with the same handling device of the nozzle, so that first cleaning and simultaneous application of the adhesion-promoting substance and the subsequent drying of the surface takes place.
  • the air nozzle is preferably in communication with a hot air generator. Furthermore, the warm air promotes the connection and networking of the substance on the surface.
  • a plurality of nozzles and air nozzles are provided for the simultaneous machining of a surface of a workpiece.
  • the plurality of nozzles or air nozzles can be performed with a common or multiple handling devices computer controlled over the surface to be processed.
  • the invention enables the environmentally friendly cleaning and application of adhesion-promoting substances on component surfaces in one process step.
  • the process can easily be used automated and allows the damage-free processing of a wide range of materials. Due to the small size of the carbon dioxide snow particles, it is possible to clean finely structured surfaces or even small pores and to provide them with the substance used.
  • any number of nozzles can be integrated. Depending on the process, the nozzles can be controlled either together or separately, so that a local treatment with different substances, or substances with different degrees of concentration for different applications in one process step.
  • This invention is applicable in connection with various available types of carbon dioxide snow blasting machines.
  • the carbon dioxide is available almost everywhere in the appropriate quality.
  • An automated application enables the achievement of short cycle times.
  • one or more metering systems for the supply of the substances used possibly a hot air generator, and a system control for automated application is required.
  • a supply of carbon dioxide in liquid or solid form, a compressed air supply and the provision of the adhesion-promoting substance are necessary for the operation.
  • the carbon dioxide used is a recycled product and is not additionally generated, so that this blasting process can be classified as environmentally friendly depending on the used substance used.
  • the operating costs are low. After the treatment, the surface is dry, so that further treatment steps are eliminated and the workpiece can be further processed immediately.
  • the device comprises a supply of carbon dioxide in the liquid phase, which is connected via a line 1 to a nozzle body 3 of a nozzle 4.
  • the nozzle body 3 has, in addition to an inlet for liquid carbon dioxide, an inlet for compressed air 2 and a feed line 7 which is in flow connection with a container for an adhesion-promoting substance.
  • an agglomeration chamber 5 is formed in the nozzle body 3.
  • the nozzle body 3 is provided with an access 7, which via a supply line with a container 8 for an adhesion-promoting substance is in flow communication.
  • a container 8 for an adhesion-promoting substance is in flow communication.
  • the connecting line for the compressed air which flows together with the substance and the relaxed in the agglomeration chamber 5 to carbon dioxide snow carbon dioxide nozzle 4 in the direction of a surface to be machined 9.
  • a metering pump 12 is arranged between the supply line 7 and the container 8 having the substance.
  • the nozzle 4 may be assigned to dry the machined surface 9 a coupled to a hot air generator 10 air nozzle 11, as indicated by the dashed lines.
  • the substance is admixed with the carbon dioxide in the agglomeration chamber 5 and fluidized by the compressed air in the jet to a mixture of carbon dioxide snow particles and the substance.
  • the mixture is accelerated by the compressed air flow in the direction of the surface to be processed 9 and the carbon dioxide snow particles clean when impinging on the surface 9 of the same of impurities and on the cleaned surface 9 adheres to the adhesion-promoting substance, with excess or not on the surface 9th adhering substance is removed by the cleaning effect of the carbon dioxide snow particles again.
  • the blasting method the application of thin layers of the substance on the surface 9 is possible.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Cleaning In General (AREA)
  • Nozzles (AREA)

Claims (11)

  1. Procédé par projection pour le nettoyage d'une surface (9), par utilisation de particules de neige de dioxyde de carbone sortant d'une buse (4), dans lequel du dioxyde de carbone à l'état liquide est envoyé dans une chambre d'agglomération (5) disposée en amont de la buse (4), et les particules de neige de dioxyde de carbone sont focalisées par un jet d'air comprimé à grande vitesse et sont accélérées dans la direction de la surface (9) à traiter, caractérisé en ce qu'une substance promotrice d'adhérence est amenée à l'air comprimé à grande vitesse avant sa pénétration dans la chambre d'agglomération (5), et, avec les particules de neige de dioxyde de carbone, est appliquée sur la surface (9) à traiter.
  2. Procédé par projection selon la revendication 1, caractérisé en ce que la substance est amenée à l'air comprimé par utilisation d'une pompe doseuse (12).
  3. Procédé par projection selon la revendication 1 ou 2, caractérisé en ce qu'une substance liquide ou solide est amenée à l'air comprimé.
  4. Procédé par projection selon l'une des revendications 1 à 3, caractérisé en ce qu'on utilise en tant que substance un promoteur d'adhérence, en particulier un silane ou un mélange de solvants de type silane.
  5. Procédé par projection selon l'une des revendications 1 à 4, caractérisé en ce qu'une buse d'air (11) est affectée à la buse (4).
  6. Procédé par projection selon la revendication 5, caractérisé en ce qu'un courant d'air chaud sort de la buse d'air (11).
  7. Dispositif pour la mise en oeuvre du procédé par projection selon la revendication 1, caractérisé en ce que la chambre d'agglomération (5) du corps de buse (3) possède un accès (6), qui par l'intermédiaire d'une conduite d'amenée (7) est en relation fluidique avec un récipient (8) contenant une substance promotrice d'adhérence.
  8. Procédé selon la revendication 7, caractérisé en ce que la conduite d'amenée (7) est reliée à une pompe doseuse (12) pour la substance.
  9. Dispositif selon la revendication 7, caractérisé en ce qu'une buse d'air (11) est prévue, dont la direction d'action correspond à la direction d'éjection de la buse (4).
  10. Dispositif selon la revendication 9, caractérisé en ce que la buse d'air (11) est reliée à un générateur d'air chaud (10).
  11. Dispositif selon l'une des revendications 7 à 10, caractérisé en ce que plusieurs buses (4) et buses d'air (11) sont prévues pour l'usinage simultané de la surface (9) d'une pièce en oeuvre.
EP14163007.9A 2014-04-01 2014-04-01 Procédé de nettoyage et d'activation simultanés de surfaces de composants par une combinaison de pulvérisation de neige carbonique et d'application de substances adhésives Not-in-force EP2926951B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14163007.9A EP2926951B1 (fr) 2014-04-01 2014-04-01 Procédé de nettoyage et d'activation simultanés de surfaces de composants par une combinaison de pulvérisation de neige carbonique et d'application de substances adhésives

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14163007.9A EP2926951B1 (fr) 2014-04-01 2014-04-01 Procédé de nettoyage et d'activation simultanés de surfaces de composants par une combinaison de pulvérisation de neige carbonique et d'application de substances adhésives

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Publication Number Publication Date
EP2926951A1 EP2926951A1 (fr) 2015-10-07
EP2926951B1 true EP2926951B1 (fr) 2016-10-05

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EP14163007.9A Not-in-force EP2926951B1 (fr) 2014-04-01 2014-04-01 Procédé de nettoyage et d'activation simultanés de surfaces de composants par une combinaison de pulvérisation de neige carbonique et d'application de substances adhésives

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* Cited by examiner, † Cited by third party
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US11358183B2 (en) 2017-12-20 2022-06-14 Halliburton Energy Services, Inc. Capture and recycling methods for non-aqueous cleaning materials

Family Cites Families (21)

* Cited by examiner, † Cited by third party
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GB1050251A (fr) 1963-05-25
US3907609A (en) 1974-02-14 1975-09-23 Mc Donnell Douglas Corp Conversion coating for titanium and titanium base alloys
US4473446A (en) 1981-05-01 1984-09-25 The Boeing Company Chromic acid-fluoride anodizing surface treatment for titanium
DE3427543A1 (de) 1983-12-01 1985-07-04 Messerschmitt-Bölkow-Blohm GmbH, 2800 Bremen Verfahren zur oberflaechenbehandlung von werkstuecken aus titan
DE3802043C1 (en) 1988-01-25 1989-07-06 Espe Stiftung & Co Produktions- Und Vertriebs Kg, 8031 Seefeld, De Process for preparing a metal surface for bonding to plastic by applying a silicon-containing layer, and use of silicon-containing material
US4981713A (en) 1990-02-14 1991-01-01 E. I. Du Pont De Nemours And Company Low temperature plasma technology for corrosion protection of steel
US5230929A (en) 1992-07-20 1993-07-27 Dow Corning Corporation Plasma-activated chemical vapor deposition of fluoridated cyclic siloxanes
JPH05295563A (ja) 1992-04-23 1993-11-09 Kansai Shin Gijutsu Kenkyusho:Kk 被膜を有する金属質材料並びにその金属質材料の製造方法
FR2703073B1 (fr) 1993-03-26 1995-05-05 Lorraine Laminage Procédé et dispositif pour le revêtement en continu d'un matériau métallique en défilement par un dépôt de polymère à gradient de composition, et produit obtenu par ce procédé.
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DE19527667A1 (de) 1995-07-28 1997-01-30 Basf Lacke & Farben Schichtstoff
US6037060A (en) 1996-11-04 2000-03-14 The Boeing Company Sol for bonding expoxies to aluminum or titanium alloys
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EP1157146B1 (fr) * 1998-12-30 2003-10-22 University Of Cincinnati Revetements de silane pour lier le caoutchouc aux metaux
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WO2003022525A2 (fr) 2001-09-11 2003-03-20 Jens Werner Kipp Procede et dispositif de decapage
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