EP2926951A1 - Methods for simultaneously cleaning and activating component surfaces by means of a combination of carbon dioxide snow jets and the application of adhesive substances - Google Patents
Methods for simultaneously cleaning and activating component surfaces by means of a combination of carbon dioxide snow jets and the application of adhesive substances Download PDFInfo
- Publication number
- EP2926951A1 EP2926951A1 EP14163007.9A EP14163007A EP2926951A1 EP 2926951 A1 EP2926951 A1 EP 2926951A1 EP 14163007 A EP14163007 A EP 14163007A EP 2926951 A1 EP2926951 A1 EP 2926951A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- carbon dioxide
- nozzle
- substance
- compressed air
- dioxide snow
- 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
Links
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 99
- 239000000126 substance Substances 0.000 title claims abstract description 67
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 46
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000004140 cleaning Methods 0.000 title description 13
- 239000000853 adhesive Substances 0.000 title description 4
- 230000001070 adhesive effect Effects 0.000 title description 4
- 230000003213 activating effect Effects 0.000 title description 2
- 239000002245 particle Substances 0.000 claims abstract description 23
- 238000005422 blasting Methods 0.000 claims abstract description 22
- 230000002776 aggregation Effects 0.000 claims abstract description 17
- 238000005054 agglomeration Methods 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 3
- 239000007787 solid Substances 0.000 claims description 6
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 5
- 229910000077 silane Inorganic materials 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 4
- 239000007767 bonding agent Substances 0.000 claims description 2
- 238000003754 machining Methods 0.000 claims description 2
- 239000011877 solvent mixture Substances 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 13
- 239000000203 mixture Substances 0.000 description 8
- 235000011089 carbon dioxide Nutrition 0.000 description 7
- 238000000576 coating method Methods 0.000 description 7
- 239000002318 adhesion promoter Substances 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 230000004913 activation Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 150000004756 silanes Chemical class 0.000 description 2
- 239000002210 silicon-based material Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 238000007743 anodising Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 238000007385 chemical modification Methods 0.000 description 1
- -1 compounds Compounds Chemical class 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 150000002366 halogen compounds Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000010137 moulding (plastic) Methods 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 150000002902 organometallic compounds Chemical class 0.000 description 1
- 150000003961 organosilicon compounds Chemical class 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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 ].
- the patents US 5814137 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 an agglomeration chamber upstream of the nozzle 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 multi-substance 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 of this contaminants 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 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)
- Nozzles (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Cleaning In General (AREA)
Abstract
Bei einem Strahlverfahren unter Verwendung von aus einer Düse (4) ausgetragenen Kohlendioxidschnee-Partikeln zur Reinigung einer Oberfläche (9), werden Kohlendioxid in flüssigem Zustand in eine der Düse (4) vorgeordnete Agglomerationskammer (5) geleitet und die durch Entspannung entstehenden Kohlendioxidschnee-Partikel durch einen Strahl aus überschneller Druckluft gebündelt und in Richtung der zu behandelnden Oberfläche (9) beschleunigt. Der überschnellen Druckluft wird vor dem Einströmen in die Agglomerationskammer (5) eine haftvermittelnde Substanz zugeführt, die mit den Kohlendioxidschnee-Partikeln auf die zu behandelnde Oberfläche (9) aufgetragen wird.In a blasting process using carbon dioxide snow particles discharged from a nozzle (4) to clean a surface (9), carbon dioxide in a liquid state is passed into an agglomeration chamber (5) upstream of the nozzle (4) and the carbon dioxide snow particles formed by relaxation bundled by a jet of super-fast compressed air and accelerated in the direction of the surface to be treated (9). The super-fast compressed air is supplied before flowing into the agglomeration chamber (5) an adhesion-promoting substance which is applied with the carbon dioxide snow particles on the surface to be treated (9).
Description
Die Reinigung und Applikation von haftvermittelnden Substanzen ist für das Kleben und Beschichten von Bauteilen von großer Bedeutung. Das Entfernen störender Oberflächenschichten und/oder Kontaminationen und der Einsatz von Haftvermittlern tragen wesentlich zur Verbesserung der Langzeitbeständigkeit von Klebungen und Beschichtungen unter schädigenden Umwelteinwirkungen bei.The cleaning and application of 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.
Bekannte Verfahren zur sequentiellen Reinigung und Applikation von Haftvermittlern erfordern komplexe mehrstufige Prozesse, die sich nur mit einem erheblichen Aufwand automatisieren lassen.Known methods for the sequential cleaning and application of adhesion promoters require complex multi-stage processes that can be automated only with considerable effort.
Bekannte Verfahren zur Reinigung und/oder Aktivierung von Bauteiloberflächen sind beispielsweise das Schleifen [
Aus
Verfahren und Vorrichtungen zum Strahlen mit Kohlendioxidschneepartikeln zeigen gute Reinigungswirkungen. In
Die Erfindung betrifft daher ein Verfahren zur gleichzeitigen Reinigung und Aktivierung von Bauteiloberflächen durch eine Kombination aus Kohlendioxidschneestrahlen und dem Auftrag von haftvermittelnden Substanzen. Die Oberfläche eines Bauteils wird dadurch für nachfolgende technische Anwendungen, insbesondere dem Kleben oder Beschichten, vorbehandelt und die Langzeitbeständigkeit von Klebungen und Beschichtungen unter schädigenden Umwelteinwirkungen wird dadurch verbessert.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.
Erfindungsgemäß wird die Aufgabe durch die Merkmale der unabhängigen Ansprüche gelöst.According to the invention the object is solved by the features of the independent claims.
Die Unteransprüche stellen vorteilhafte Ausgestaltungen der Erfindung dar.The subclaims represent advantageous embodiments of the invention.
Die Erfindung beruht darauf, dass eine haftvermittelnde Substanz durch den Kohlendioxidschneestrahl-Prozess auf die Oberfläche aufgebracht wird. Bei einer Reinigung mit aus einer Düse ausgetragenen Kohlendioxidschnee-Partikeln, wird Kohlendioxid in flüssigem Zustand in eine der Düse vorgeordneten Agglomerationskammer geleitet und durch die Entspannung in der Kammer entstehen Kohlendioxidschnee-Partikel. Diese Kohlendioxidschnee-Partikel werden durch einen Strahl aus überschneller Druckluft gebündelt und in Richtung der zu behandelnden Oberfläche beschleunigt. Der überschnellen Druckluft wird vor dem Einströmen in die Agglomerationskammer eine haftvermittelnde Substanz zugeführt, die mit den Kohlendioxidschnee-Partikeln auf die zu behandelnde Oberfläche aufgetragen wird.The invention is based on the fact that an adhesion-promoting substance is applied to the surface by the carbon dioxide snow blasting process. When cleaning with discharged from a nozzle carbon dioxide snow particles, carbon dioxide is passed in the liquid state in an agglomeration chamber upstream of the nozzle 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.
Die im Rahmen der Erfindung eingesetzte haftvermittelnde Substanz weist insbesondere adhäsionsfördernde, korrosionsschützende oder hydrophobisierende Eigenschaften auf und kann auf nachfolgende Kleb- oder Beschichtungsvorgänge abgestimmt sein. Solche Substanzen, die in dünnen Schichten auftragbar sind, sind dem Fachmann in dem Gebiet der Oberflächenvorbehandlung geläufig und er wählt in Abhängigkeit von den jeweiligen Anforderungen an die haftvermittelnde Wirkung, insbesondere unter Berücksichtigung nachfolgender Weiterverarbeitungsvorgänge, eine geeignete Substanz aus, bzw. mischt diese aus vorhandenen Bestandteilen neu.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.
Die haftvermittelnde Substanz wird dem Strom aus Druckluft zugeführt und in diesem Strahl verwirbelt. Das aus den Kohlendioxidschnee-Partikeln und der Substanz erzeugte Mehrstoffgemisch wird durch die Druckluftströmung in der Düse beschleunigt und die Kohlendioxidschnee-Partikel reinigen beim Auftreffen auf der Oberfläche eines Bauteils dieses von Verunreinigungen in bekannter Art und Weise. Da die Kohlendioxidschnee-Partikel unter Atmosphärendruck unmittelbar vom festen Aggregatszustand in den gasförmigen übergehen, bleibt auf der gestrahlten bzw. gereinigten Oberfläche nur die haftvermittelnde Substanz zurück. Beim Auftreffen des Gemisches entsteht ein Gleichgewicht zwischen dem Reinigen der Oberfläche und dem Aufbringen der verwendeten Substanz. Überschüssige bzw. nicht an der Oberfläche anhaftende Substanz wird durch den Reinigungseffekt der Kohlendioxidschnee-Partikel wieder abgetragen, so dass das Auftragen von dünnen Schichten (im Nanometerbereich) der Substanz möglich ist.The adhesion-promoting substance is supplied to the stream of compressed air and swirled in this jet. The multi-substance 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 of this contaminants 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.
Das flüssige Kohlendioxid wird dem Druckluftstrom und der oberflächenaktivierenden bzw. funktionalisierenden Substanz in einem Entspannungsraum, der so genannten Agglomerationskammer, zu dosiert. Diese Gestaltung des Verfahrens ermöglicht eine gleichmäßige Verteilung aus Kohlendioxidschnee-Partikeln und der Substanz, da es durch die Verwirbelung in der Agglomerationskammer zu einer Vermischung der Medien zu einem Mehrstoffgemisch kommt. Das Zuführen der Substanz in den Druckluftstrom vermeidet ein Zufrieren der Förderleitung des flüssigen Kohlendioxids. Die Verwendung von flüssigem Kohlendioxid ist insofern vorteilhaft, als die aufwendige Lagerung von Trockeneis entfällt und die Kohlendioxidschnee-Partikel unmittelbar während des Strahlverfahrens erzeugt werden.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.
Aufgrund der Temperatur der Kohlendioxidschnee-Partikel von -78,5° C kommt es nach dem Strahlen auf der Oberfläche zu einer geringen Bildung von Kondenswasser. Dieses Kondenswasser kann in Abhängigkeit von der verwendeten haftvermittelnden Substanz unterstützend zur Anbindung und Quervernetzung der Substanz an der Oberfläche beitragen. Diese positive Wirkung ist insbesondere bei der Verarbeitung von Silanen zu beobachten.Due to the temperature of the carbon dioxide snow particles of -78.5 ° C, there is little formation of condensation after blasting on the surface. Depending on the adhesion-promoting substance used, this condensation water can contribute to the binding and cross-linking of the substance to the surface. This positive effect is particularly noticeable in the processing of silanes.
Um die Förderwege relativ kurz zu halten, wird die Substanz der Druckluft unmittelbar vor dem Eintritt in die Düse zugeführt. Ein die Substanz bevorratender Behälter kann beispielsweise in unmittelbarer Nähe der Düse bzw. der Vorrichtung zum Stahlen aufgestellt werden, weshalb transportbedingte Schädigungen der Substanz vermieden werden können und auch die Energie zum Fördern der Substanz relativ gering ist.In order to keep the conveying paths relatively short, 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.
Zur Regelung der Menge der zugeführten Substanz wird vorzugsweise die Substanz unter Verwendung einer Dosierpumpe der Druckluft zugeführt. Die Zuführung der Substanz kann in einem konstanten Volumenstrom oder unter konstantem Druck erfolgen. Zweckmäßigerweise wird der Druckluft als Substanz ein Haftvermittler oder ein Gemisch aus Haftvermittler und Lösungsmittel zugeführt.To control the amount of the added substance, 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. Conveniently, the compressed air is supplied as a substance, an adhesion promoter or a mixture of adhesion promoter and solvent.
Nach einer Weiterbildung wird der Düse eine Luftdüse nachgeführt. Vorzugsweise wird aus der Luftdüse ein Warmluftstrom ausgetragen. Der lokal auf die Oberfläche des Werkstücks einwirkende Warmluftstrom fördert die Anbindung der Substanz an der Oberfläche, die nach der Behandlung trocken ist und einer weiteren Verarbeitung unterzogen werden kann.According to a development, the nozzle is followed by an air nozzle. Preferably, 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.
Eine Vorrichtung zur Durchführung des zuvor erläuterten Strahlverfahrens umfasst einen Vorrat für flüssiges Kohlendioxid, der über eine Leitung mit mindestens einer Agglomerationskammer eines Düsenkörpers einer Düse verbunden. Der Agglomerationskammer des Düsenkörpers ist ein Zugang vorgeschaltet welcher über eine Zuleitung mit Druckluft und einem Behälter für eine oberflächenaktivierende und/oder oberflächenfunktionalisierende Substanz in Strömungsverbindung steht.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 Oberflächenfunktionalisierende substance in flow communication.
In der Agglomerationskammer können sich die Kohlendioxidschnee-Partikel bilden und mit der in den Strom aus Druckluft eingeleiteten Substanz vermischen, um gemeinsam durch die Düse auf die zu bearbeitende Oberfläche aufgetragen zu werden. Zweckmäßigerweise wird dem Strahl aus überschneller Druckluft als Substanz beispielsweise ein Haftvermittler, vorzugsweise Silan, oder ein Gemisch aus Silan und Lösungsmittel zugeführt. Dementsprechend werden ohne zeitliche Verzögerungen Verunreinigungen von der zu bearbeitenden Oberfläche entfernt und gleichzeitig die haftvermittelnde Substanz auf die Oberfläche aufgebracht.In the agglomeration chamber, 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. Conveniently, 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.
Um eine definierte Menge der Substanz in den Düsenkörper zu befördern, ist bevorzugt die Zuleitung mit einer Dosierpumpe für die Substanz verbunden. Selbstverständlich ist die Dosierpumpe bezüglich ihrer Mengen- und/oder Druckregelung einstellbar.In order to convey a defined amount of the substance into the nozzle body, the feed line is preferably connected to a metering pump for the substance. Of course, the metering pump with respect to their volume and / or pressure control is adjustable.
Für die automatisierte Führung der Düse ist beispielsweise ein steuerbares Handhabungsgerät erforderlich.For example, a controllable handling device is required for the automated guidance of the nozzle.
Damit eine Trocknung der gestrahlten und mit der haftvermittelnden Substanz versehenen Oberfläche in einem Arbeitsgang mit dem Strahlverfahren zu realisieren ist, ist in Ausgestaltung eine Luftdüse vorgesehen, deren Wirkrichtung der Austragsrichtung der Düse entspricht. Die Luftdüse kann mit der Düse bzw. deren Düsenkörper gekoppelt sein und mit dem selben Handhabungsgerät der Düse nachgeführt werden, so dass zunächst die Reinigung und gleichzeitige Applikation der haftvermittelnden Substanz und die anschließende Trocknung der Oberfläche erfolgt.Thus, a drying of the blasted and provided with the adhesion-promoting substance surface is to be realized in a single operation with the blasting method, 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.
Da sich Warmluft günstig auf die Trocknung der Oberfläche auswirkt und diese beschleunigt, steht vorzugsweise die Luftdüse mit einem Heißlufterzeuger in Verbindung. Im Weiteren fördert die warme Luft die Anbindung und Vernetzung der Substanz an der Oberfläche.Since warm air has a favorable effect on the drying of the surface and accelerates it, 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.
Um relativ große Oberflächen gezielt zu bearbeiten, sind in Ausgestaltung mehrere Düsen und Luftdüsen zur gleichzeitigen Bearbeitung einer Oberfläche eines Werkstücks vorgesehen. Die Vielzahl von Düsen bzw. Luftdüsen kann mit einem gemeinsamen oder mit mehreren Handhabungsgeräten rechnergesteuert über die zu bearbeitende Oberfläche geführt werden.In order to specifically process relatively large surfaces, 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.
Die Erfindung ermöglicht in einem Prozessschritt die umweltfreundliche Reinigung und Applikation von haftvermittelnden Substanzen auf Bauteiloberflächen. Das Verfahren kann leicht automatisiert eingesetzt werden und ermöglicht die beschädigungsfreie Bearbeitung eines großen Werkstoffspektrums. Durch die geringe Größe der Kohlendioxidschnee-Partikel ist es möglich, fein strukturierte Oberflächen oder auch kleine Poren zu reinigen und mit der verwendeten Substanz zu versehen. In einer automatisierten Anlage können beliebig viele Düsen integriert werden. Abhängig von der Prozessführung können die Düsen entweder zusammen oder getrennt voneinander angesteuert werden, so dass sich eine lokale Behandlung mit verschiedenen Substanzen, oder auch Substanzen mit unterschiedlichen Konzentrationsgraden für verschiedene Anwendungsfälle in einem Prozessschritt realisieren lässt.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. In an automated system 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.
Diese Erfindung ist im Zusammenhang mit verschiedenen zur Verfügung stehenden Bauarten von Kohlendioxidschnee-Strahlanlagen anwendbar. Das Kohlendioxid ist nahezu überall in entsprechender Qualität verfügbar. Eine automatisierte Anwendung ermöglicht die Erzielung kurzer Taktzeiten.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.
Im Weiteren sind neben der Kohlendioxidschnee-Strahlanlage, ein oder mehrere Dosiersysteme für die Zuführung der verwendeten Substanzen, eventuell ein Heißlufterzeuger, sowie eine Anlagensteuerung zur automatisierten Anwendung erforderlich. Selbstverständlich sind für den Betrieb eine Versorgung mit Kohlendioxid in flüssiger oder fester Form, eine Druckluftversorgung sowie die Bereitstellung der haftvermittelnden Substanz notwendig. Das eingesetzte Kohlendioxid ist ein Recyclingprodukt und wird nicht zusätzlich erzeugt, so dass sich dieses Strahlverfahren in Abhängigkeit der verwendeten zugeführten Substanz als umweltfreundlich einstufen lässt. Durch die Verwendung von Kohlendioxid, Druckluft und handelsüblichen haftvermittelnden Substanzen sind die Betriebskosten gering. Nach der Behandlung ist die Oberfläche trocken, so dass weitere Behandlungsschritte entfallen und das Werkstück unmittelbar weiter verarbeitet werden kann.Furthermore, in addition to the carbon dioxide snow blasting system, 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. Of course, 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. Through the use of carbon dioxide, compressed air and commercially available adhesion-promoting substances, 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.
Es versteht sich, dass die vorstehend genannten und nachstehend noch zu erläuternden Merkmale nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen verwendbar sind. Der Rahmen der Erfindung ist nur durch die Ansprüche definiert.It goes without saying that the features mentioned above and those yet to be explained below can be used not only in the respectively specified combination but also in other combinations are. The scope of the invention is defined only by the claims.
Die Erfindung wird im Folgenden anhand eines Ausführungsbeispiels unter Bezugnahme auf die zugehörige Zeichnung näher erläutert.The invention will be explained in more detail below with reference to an embodiment with reference to the accompanying drawings.
Es zeigt:
- Fig. 1
- eine schematische Teildarstellung einer Vorrichtung zur Durchführung eines erfindungsgemäßen Verfahrens und
- Fig. 2
- eine schematische Teildarstellung der Vorrichtung nach
Fig. 1 ..
- Fig. 1
- a schematic partial view of an apparatus for performing a method according to the invention and
- Fig. 2
- a schematic partial view of the device according to
Fig. 1 ..
Die Vorrichtung umfasst einen Vorrat für Kohlendioxid in flüssiger Phase, welcher über eine Leitung 1 mit einem Düsenkörper 3 einer Düse 4 verbunden ist. Der Düsenkörper 3 weist neben einem Eingang für flüssiges Kohlendioxid ein Einlass für Druckluft 2 und einer Zuleitung 7, die mit einem Behälter für eine haftvermittelnde Substanz in Strömungsverbindung steht, auf.The device comprises a supply of carbon dioxide in the liquid phase, which is connected via a
In dem Düsenkörper 3 ist eine Agglomerationskammer 5 ausgebildet. Der Düsenkörper 3 ist mit einem Zugang 7 versehen, der über eine Zuleitung mit einem Behälter 8 für eine haftvermittelnde Substanz in Strömungsverbindung steht. An dem Zugang 2 liegt auch die Verbindungsleitung für die Druckluft an, die gemeinsam mit der Substanz und dem in der Agglomerationskammer 5 zu Kohlendioxidschnee entspannten Kohlendioxid die Düse 4 in Richtung einer zu bearbeitenden Oberfläche 9 strömt. Um während des Strahlverfahrens eine bestimmte Menge der Substanz geregelt in den Prozess einzuführen, ist zwischen der Zuleitung 7 und dem die Substanz aufweisenden Behälter 8 eine Dosierpumpe 12 angeordnet.In the
Der Düse 4 kann zur Trocknung der bearbeiteten Oberfläche 9 eine mit einem Heißlufterzeuger 10 gekoppelte Luftdüse 11 zugeordnet sein, wie durch die gestrichelten Linien angedeutet ist.The
Die Substanz wird dem Kohlendioxid in der Agglomerationskammer 5 beigemischt und durch die Druckluft in dem Strahl zu einem Gemisch aus Kohlendioxidschnee-Partikeln und der Substanz verwirbelt. Das Gemisch wird durch die Druckluftströmung in Richtung der zu bearbeitenden Oberfläche 9 beschleunigt und die Kohlendioxidschnee-Partikel reinigen beim Auftreffen auf der Oberfläche 9 dieselbe von Verunreinigungen und auf der gereinigten Oberfläche 9 haftet die haftvermittelnde Substanz an, wobei überschüssige bzw. nicht an der Oberfläche 9 anhaftende Substanz durch die reinigende Wirkung der Kohlendioxidschnee-Partikel wieder abgetragen wird. Durch das Strahlverfahren ist das Auftragen von dünnen Schichten der Substanz auf der Oberfläche 9 möglich.The substance is admixed with the carbon dioxide in the
- 1.1.
- Flüssig-CO2 VerbindungleistungLiquid CO 2 compound performance
- 2.Second
- Überschnelle Druckluft VerbindungsleitungOver-speed compressed air connection line
- 3.Third
- Düsenkörpernozzle body
- 4.4th
- Düsejet
- 5.5th
- Agglomerationskammeragglomeration chamber
- 6.6th
- ZugangAccess
- 7.7th
- Zuleitungsupply
- 8.8th.
- Behältercontainer
- 9.9th
- Oberflächesurface
- 10.10th
- HeißlufterzeugerHot air generators
- 11.11th
- Luftdüseair nozzle
- 12.12th
- Dosierpumpemetering
Claims (11)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP14163007.9A EP2926951B1 (en) | 2014-04-01 | 2014-04-01 | Methods for simultaneously cleaning and activating component surfaces by means of a combination of carbon dioxide snow jets and the application of adhesive substances |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP14163007.9A EP2926951B1 (en) | 2014-04-01 | 2014-04-01 | Methods for simultaneously cleaning and activating component surfaces by means of a combination of carbon dioxide snow jets and the application of adhesive substances |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2926951A1 true EP2926951A1 (en) | 2015-10-07 |
| EP2926951B1 EP2926951B1 (en) | 2016-10-05 |
Family
ID=50434018
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP14163007.9A Not-in-force EP2926951B1 (en) | 2014-04-01 | 2014-04-01 | Methods for simultaneously cleaning and activating component surfaces by means of a combination of carbon dioxide snow jets and the application of adhesive substances |
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| Country | Link |
|---|---|
| EP (1) | EP2926951B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11358183B2 (en) | 2017-12-20 | 2022-06-14 | Halliburton Energy Services, Inc. | Capture and recycling methods for non-aqueous cleaning materials |
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|---|---|
| EP2926951B1 (en) | 2016-10-05 |
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