DE102012003514A1 - Method for dry cleaning and pretreatment of surfaces, involves pairing of beam with synergistic medium by external supply, where beam is mixed with fuel gas and carbon dioxide snow - Google Patents

Method for dry cleaning and pretreatment of surfaces, involves pairing of beam with synergistic medium by external supply, where beam is mixed with fuel gas and carbon dioxide snow Download PDF

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DE102012003514A1
DE102012003514A1 DE201210003514 DE102012003514A DE102012003514A1 DE 102012003514 A1 DE102012003514 A1 DE 102012003514A1 DE 201210003514 DE201210003514 DE 201210003514 DE 102012003514 A DE102012003514 A DE 102012003514A DE 102012003514 A1 DE102012003514 A1 DE 102012003514A1
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medium
synergistic
cleaning surfaces
carbon dioxide
surfaces according
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DE201210003514
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German (de)
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Auf Nichtnennung Antrag
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ACP-ADVANCED CLEAN PRODUCTION GmbH
ACP ADVANCED CLEAN PRODUCTION GmbH
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ACP-ADVANCED CLEAN PRODUCTION GmbH
ACP ADVANCED CLEAN PRODUCTION GmbH
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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C11/00—Selection of abrasive materials or additives for abrasive blasts
    • B24C11/005—Selection of abrasive materials or additives for abrasive blasts of additives, e.g. anti-corrosive or disinfecting agents in solid, liquid or gaseous form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)

Abstract

The method involves pairing of a beam with a synergistic medium (5) by external supply. The beam is mixed with fuel gas and carbon dioxide snow. The synergistic medium is densely supplied to carbon dioxide snow jet. The synergistic medium is enveloped by the carbon dioxide snow jet. Hot air, suction air, deionized air, ozone, solvent or plasma is used as the synergistic medium. An independent claim is included for a device for cleaning of surfaces.

Description

Zur schonenden und vor allem trockenen Reinigung und Vorbehandlung von Oberflächen hat sich für viele Einsatzfälle eine Methode durchgesetzt, die die abrassive Wirkung von Kohlendioxidschnee nutzt. Dazu wird in der Regel CO2 aus der flüssigen Phase bezogen. Bei der Expansion entsteht durch die Abkühlung CO2-Schnee. Dies geschieht beispielsweise mit der Unterstützung eines unter hohem Druck stehenden Trägergases – in der Regel Luft – dem der CO2-Schnee beigemischt wird und über eine Düse mit hoher Strömungsgeschwindigkeit freigesetzt wird. Der Reinigungseffekt entsteht durch die hohe Auftreffgeschwindigkeit auf die zu behandelnde Oberfläche, durch die explosionsartige Veränderung des Aggregatszustandes von fest in gasförmig bei Auftreffen auf die Oberfläche und durch den Kälteschock auf die Verunreinigung. Der Stand der Technik ist in verschiedenen Veröffentlichungen ausführlich dargestellt. Wichtig für den Einsatz des beschriebenen Reinigungsverfahrens ist die Ausführung der Strahldüse. In den bekannten Patentschriften und Veröffentlichungen werden runde Düsen verwendet, die in der Regel als sogenannte „Laval-Düsen” ausgeführt werden. Damit lassen sich Überschall-Strömungen erzeugen und man erzielt dadurch eine hohe Impuls-Energie bei den CO2-Schneeflocken, die die abrassive Wirkung erhöht.For gentle and above all dry cleaning and pretreatment of surfaces, a method has been established for many applications, which uses the abrasive effect of carbon dioxide snow. As a rule, CO 2 is obtained from the liquid phase. During expansion CO 2 snow is produced by cooling. This happens, for example, with the support of a high pressure carrier gas - usually air - which is mixed with the CO 2 snow and is released through a nozzle with high flow velocity. The cleaning effect is caused by the high impact velocity on the surface to be treated, by the explosive change of the state of aggregation of solid in gaseous form when hitting the surface and by the cold shock on the impurity. The prior art is detailed in various publications. Important for the use of the described cleaning method is the design of the jet nozzle. In the known patents and publications round nozzles are used, which are usually designed as so-called "Laval nozzles". This makes it possible to generate supersonic flows and thus achieves a high momentum energy in the CO 2 snowflakes, which increases the abrasive effect.

Aufgabe der vorliegenden Erfindung ist es, direkt am CO2-Schneestrahl synergetische, d. h. zusammen- oder mitwirkende Medien einzusetzen, um damit ganz neue Wirkungen zu erzielen und neue Anwendungen der CO2-Schneestrahlreinigung zu erschließen oder in einem Arbeitsgang zusammenzufassen. Wird als synergetisches Medium beispielsweise Heißluft zugeführt und damit die zu reinigende Oberfläche angewärmt, so kann damit der oben beschriebene Kälteschock verstärkt und die Reinigungswirkung erhöht werden. Ein anderes Beispiel ist die Verwendung von deionisierter Luft, um die statische Aufladung, die durch die hohe Strömungsgeschwindigkeit des o. g. Treibgases entsteht, wieder zu kompensieren. Verwendet man Ozon bzw. Plasma, so kann man Reinigung und Hydrophilisierung der Werkstückoberfläche miteinander verbinden, was häufig bei zu verklebenden oder zu beschichtenden Oberflächen notwendig ist. Zur Erhöhung der abrassiven Wirkung kann auch ein synergetisches Medium, wie z. B. ein körniger Feststoff oder sonstiges festes, flüssiges oder gasförmiges Medium zugeführt werden.Object of the present invention is to use synergistic, ie co-or contributing media directly to the CO 2 -Schneestrahl to achieve completely new effects and to open up new applications of CO 2 -Schneestrahlreinigung or summarize in a single operation. If, for example, hot air is supplied as the synergistic medium and thus the surface to be cleaned is heated, then the above-described cold shock can be enhanced and the cleaning effect can be increased. Another example is the use of deionized air to compensate for the static charge caused by the high flow rate of the above-mentioned propellant gas. If one uses ozone or plasma, then one can combine cleaning and hydrophilization of the workpiece surface with each other, which is often necessary in surfaces to be bonded or coated. To increase the abrassiven effect can also be a synergistic medium such. B. a granular solid or other solid, liquid or gaseous medium can be supplied.

Zur Lösung der erfindungsgemäßen Aufgabe sind bei dem beschriebenen Verfahren die Merkmale nach Anspruch 1 vorgesehen.To achieve the object of the invention, the features of claim 1 are provided in the described method.

Die Ansprüche 2 bis 4 beschreiben die unterschiedlichen Verknüpfungsmöglichkeiten zwischen CO2-Schneestrahl und synergetischem Medium.The claims 2 to 4 describe the different linking possibilities between CO 2 -Schneestrahl and synergistic medium.

In den Ansprüchen 5 bis 11 sind Ausführungsformen in der Kombination von CO2-Schneestrahl und synergetischem Medium dargestellt. Einzelheiten der Erfindung sind der weiteren Beschreibung und der zeichnerischen Darstellung zu entnehmen.In the claims 5 to 11 embodiments are shown in the combination of CO 2 -Schneestrahl and synergistic medium. Details of the invention will be apparent from the further description and the drawings.

Es zeigenShow it

1 in einem schematischen Längsschnitt die seitlich, direkt am CO2-Schneestrahl zugeführten synergetischen Medien 1 in a schematic longitudinal section, the side, directly on the CO 2 -Schnerahlhl supplied synergistic media

2 in einem schematischen Längsschnitt, wie das synergetische Medium vom CO2-Schneestrahl umhüllt wird. 2 in a schematic longitudinal section, how the synergetic medium is covered by the CO 2 -snow jet.

3 in einem schematischen Längsschnitt, wie der CO2-Schneestrahl vom synergetischen Medium umhüllt wird. 3 in a schematic longitudinal section, as the CO 2 snow jet is enveloped by the synergistic medium.

Gemäß 1 gelangt der CO2-Schneestrahl (4) von der Düse (2), die im Gehäuse (1) eingelassen ist, zur Bearbeitungsoberfläche, dabei kann das synergetische Medium (5) seitlich über eine weitere Düse (3) zugeführt werden oder das synergetische Medium (5) wird, wie in 2 gezeigt, vom CO2-Schneestrom (4) umflutet. Hingegen wird gemäß 3 der CO2-Schneestrom vom synergetischen Medium (5) umflutet. Welche Ausführungsform zum Tragen kommt, hängt von der Kombination zwischen CO2-Schneestrom und dem ausgesuchten synergetischen Medium ab und welche Wirkung erzielt werden soll.According to 1 the CO 2 snow jet ( 4 ) from the nozzle ( 2 ) in the housing ( 1 ), to the processing surface, while the synergetic medium ( 5 ) laterally via another nozzle ( 3 ) or the synergistic medium ( 5 ), as in 2 shown by the CO 2 snow stream ( 4 ) flooded. On the other hand, according to 3 the CO 2 snow stream from the synergistic medium ( 5 ) flooded. Which embodiment comes into play depends on the combination between CO 2 -snow stream and the selected synergetic medium and which effect is to be achieved.

Claims (11)

Verfahren und Vorrichtung zur Reinigung von Oberflächen dadurch gekennzeichnet, dass ein Strahl, gemischt aus Treibgas und CO2-Schnee mit einem synergetischen Medium durch externe Zufuhr gepaart wird.A method and apparatus for cleaning surfaces characterized in that a jet, mixed from propellant gas and CO 2 snow is paired with a synergetic medium by external supply. Verfahren und Vorrichtung zur Reinigung von Oberflächen nach Anspruch 1 dadurch gekennzeichnet, dass das synergetische Medium dicht am CO2-Schneestrahl zugeführt wird.Method and device for cleaning surfaces according to claim 1, characterized in that the synergistic medium is supplied close to the CO 2 -snow jet. Verfahren und Vorrichtung zur Reinigung von Oberflächen nach Anspruch 1 dadurch gekennzeichnet, dass das synergetische Medium vom CO2-Schneestrahl umhüllt wird.A method and apparatus for cleaning surfaces according to claim 1, characterized in that the synergistic medium is covered by the CO 2 snow jet. Verfahren und Vorrichtung zur Reinigung von Oberflächen nach Anspruch 1 dadurch gekennzeichnet, dass der CO2-Schneestrahl vom synergetischen Medium umhüllt wird. Method and device for cleaning surfaces according to claim 1, characterized in that the CO 2 snow jet is enveloped by the synergistic medium. Verfahren und Vorrichtung zur Reinigung von Oberflächen nach Anspruch 1 bis 4 dadurch gekennzeichnet, dass als synergetisches Medium Heißluft verwendet wird.Method and device for cleaning surfaces according to claim 1 to 4, characterized in that hot air is used as the synergistic medium. Verfahren und Vorrichtung zur Reinigung von Oberflächen nach Anspruch 1 bis 4 dadurch gekennzeichnet, dass als synergetisches Medium Saugluft verwendet wird.Method and device for cleaning surfaces according to claim 1 to 4, characterized in that suction air is used as the synergistic medium. Verfahren und Vorrichtung zur Reinigung von Oberflächen nach Anspruch 1 bis 4 dadurch gekennzeichnet, dass als synergetisches Medium deionisierte Luft verwendet wird.Method and device for cleaning surfaces according to claim 1 to 4, characterized in that deionized air is used as the synergistic medium. Verfahren und Vorrichtung zur Reinigung von Oberflächen nach Anspruch 1 bis 4 dadurch gekennzeichnet, dass als synergetisches Medium Ozon verwendet wird.Method and device for cleaning surfaces according to claim 1 to 4, characterized in that is used as synergetic medium ozone. Verfahren und Vorrichtung zur Reinigung von Oberflächen nach Anspruch 1 bis 4 dadurch gekennzeichnet, dass als synergetisches Medium Lösungsmittel verwendet wird.Method and device for cleaning surfaces according to claim 1 to 4, characterized in that solvent is used as the synergistic medium. Verfahren und Vorrichtung zur Reinigung von Oberflächen nach Anspruch 1 bis 4 dadurch gekennzeichnet, dass als synergetisches Medium Plasma verwendet wird.Method and device for cleaning surfaces according to claim 1 to 4, characterized in that plasma is used as the synergistic medium. Verfahren und Vorrichtung zur Reinigung von Oberflächen nach Anspruch 1 bis 4 dadurch gekennzeichnet, dass ein synergetisches Medium zur Optimierung der abrassiven Wirkung des Strahles zugeführt wird.Method and device for cleaning surfaces according to claim 1 to 4, characterized in that a synergetic medium for optimizing the abrasive effect of the jet is supplied.
DE201210003514 2012-02-24 2012-02-24 Method for dry cleaning and pretreatment of surfaces, involves pairing of beam with synergistic medium by external supply, where beam is mixed with fuel gas and carbon dioxide snow Ceased DE102012003514A1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106695572A (en) * 2017-01-20 2017-05-24 金华明正科技有限公司 Air assistance shot blasting machine
WO2018104404A1 (en) * 2016-12-08 2018-06-14 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Arrangement and process for treating a surface
DE102015210797B4 (en) * 2015-06-12 2019-03-28 Continental Automotive Gmbh Method for producing a piezoelectric layer stack

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008037089A1 (en) * 2008-08-08 2010-02-11 Linde Ag Apparatus and method for cleaning objects by means of dry snow
DE102010020619A1 (en) * 2009-05-26 2011-02-24 Ohe, Jürgen von der, Dr.-Ing. Method for cleaning metallic or non-metallic surfaces of e.g. turbine blade in steam turbine, involves loading flow of compressed air with carbon dioxide pellets, hardened pellets, water ice particles and fragmented pellets
DE102010005762A1 (en) * 2010-01-25 2011-07-28 Oerlikon Trading Ag, Trübbach Cleaning process for coating systems

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008037089A1 (en) * 2008-08-08 2010-02-11 Linde Ag Apparatus and method for cleaning objects by means of dry snow
DE102010020619A1 (en) * 2009-05-26 2011-02-24 Ohe, Jürgen von der, Dr.-Ing. Method for cleaning metallic or non-metallic surfaces of e.g. turbine blade in steam turbine, involves loading flow of compressed air with carbon dioxide pellets, hardened pellets, water ice particles and fragmented pellets
DE102010005762A1 (en) * 2010-01-25 2011-07-28 Oerlikon Trading Ag, Trübbach Cleaning process for coating systems

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015210797B4 (en) * 2015-06-12 2019-03-28 Continental Automotive Gmbh Method for producing a piezoelectric layer stack
WO2018104404A1 (en) * 2016-12-08 2018-06-14 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Arrangement and process for treating a surface
CN106695572A (en) * 2017-01-20 2017-05-24 金华明正科技有限公司 Air assistance shot blasting machine

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