EP3325215A1 - Procédé de traitement de surfaces avec un agent de sablage constitué de particules de glace sèche - Google Patents

Procédé de traitement de surfaces avec un agent de sablage constitué de particules de glace sèche

Info

Publication number
EP3325215A1
EP3325215A1 EP16745089.9A EP16745089A EP3325215A1 EP 3325215 A1 EP3325215 A1 EP 3325215A1 EP 16745089 A EP16745089 A EP 16745089A EP 3325215 A1 EP3325215 A1 EP 3325215A1
Authority
EP
European Patent Office
Prior art keywords
carbon dioxide
blasting
dry ice
ice particles
particles
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.)
Withdrawn
Application number
EP16745089.9A
Other languages
German (de)
English (en)
Inventor
Thomas Böckler
Friedhelm Herzog
Andreas Donnerhack
Steven Powell
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.)
Messer Group GmbH
Original Assignee
Messer Group GmbH
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
Application filed by Messer Group GmbH filed Critical Messer Group GmbH
Publication of EP3325215A1 publication Critical patent/EP3325215A1/fr
Withdrawn legal-status Critical Current

Links

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
    • 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
    • B24C1/06—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for producing matt surfaces, e.g. on plastic materials, on glass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/32—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks
    • B24C3/322—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks for electrical components
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00—Carbon; Compounds thereof
    • C01B32/50—Carbon dioxide
    • C01B32/55—Solidifying

Definitions

  • the invention relates to a method for treating surfaces with a blasting agent of dry ice particles.
  • the irradiation of the surfaces with a blasting abrasive is an alternative to mechanical treatments such as grinding or brushing.
  • a blasting abrasive is an alternative to mechanical treatments such as grinding or brushing.
  • abrasive blasting agents such as sand, glass, corundum or plastic granules
  • non-abrasive blasting agents such as carbon dioxide snow or
  • Carbon dioxide pellets differentiated.
  • abrasive is here to be understood as an effect on a surface, which leads to a material removal from the treated surface, in particular to a roughening of the treated surface.
  • the treated with abrasive blasting materials have - in contrast to those treated with non-abrasive abrasives - roughened after treatment surface, so characterized by a material removal surface.
  • a treatment with abrasive abrasives is therefore particularly suitable to
  • Pre-treat surfaces for subsequent processing for example, for a paint or a coating.
  • the main disadvantage of conventional abrasive blasting agents is that the particles of the blasting medium occurring during the irradiation are carried off and contaminate the irradiated one
  • a ceramic surface treated with sandblasting has silicon carbide grains which, in particular, can break out under mechanical stress. Therefore, sandblasted ceramic surfaces are not currently under clean room conditions, as required especially in the semiconductor industry be used.
  • the break-out of particles, such as the mentioned silicon carbide particles constitutes a contamination that deleteriously interferes with the production processes for the production of semiconductor products and leads to errors in the product to be manufactured.
  • the risk of contamination by the use of abrasive blasting agents is also given, for example, in various applications in the food, medical and automotive sectors.
  • Blasting agent is used carbon dioxide in the form of snow or pellets.
  • Carbon dioxide snow is obtained by expansion of liquid carbon dioxide at a decompression nozzle and in its use as a blasting medium often radiated directly from the expansion nozzle at high speed, up to supersonic speed, on the surface to be treated.
  • the irradiation with carbon dioxide snow is particularly suitable for the removal of coatings and coatings of pressure-sensitive surfaces.
  • Carbon dioxide pellets are granules of carbon dioxide particles which are discharged in a carrier gas stream, usually compressed air, from a jet nozzle arranged in a jet gun onto the surface to be processed.
  • a carrier gas stream usually compressed air
  • liquid carbon dioxide is converted by relaxation into carbon dioxide snow. This is compressed into a cake and pressed through a die.
  • cylindrical or spherical particles with a certain distribution of length and diameter;
  • the pellets typically, the pellets have a length between 5 to 10 mm and a diameter of 2 to 5 mm.
  • Carbon dioxide pellets therefore have an abrasive effect only on very soft surfaces; However, they have prevailed as a steel agent in the removal of surface-adhering coatings or contaminants, such as the Entlackung of
  • the effect of the carbon dioxide particles is based primarily on the cooling effect of the particle striking the surface at a temperature of -78.5 ° C., which leads to tensions within a coating resting on the surface and thus dissolves it from the substrate.
  • the mechanical effect of the particles on the surface which makes up the essential effect of abrasive blasting, plays only a minor role in carbon dioxide blasting due to the low hardness of the blasting particles. Consequently, the common methods for
  • Carbon dioxide surface treatment in particular, not suitable for treatment of metal or plastic workpieces where roughening of the treated surface is required.
  • the object of the present invention is therefore to specify a method for the treatment of surfaces, in particular for the abrasive treatment of workpiece surfaces, in which no carryover of blasting agent occurs.
  • the inventive method for treating surfaces with a blasting agent of dry ice particles is thus characterized in that the Blasting agent used dry ice particles are made from a solid carbon dioxide generated by freezing of liquid carbon dioxide solid carbon dioxide.
  • liquid carbon dioxide is introduced into a pressure-resistant reactor where it is brought into thermal contact with a heat transfer fluid in a still liquid state in a heat exchanger located in the reactor, the temperature of which is below the solidification temperature of carbon dioxide. Due to the thermal contact with the heat transfer fluid, the liquid carbon dioxide freezes to form a body of solid carbon dioxide. Preferably, no pressure is applied at any time during the treatment which is higher than the pressure of the liquid carbon dioxide when it is introduced into the reactor.
  • the solid carbon dioxide produced in this way is of vitreous form and has a considerably greater hardness and brittleness than carbon dioxide snow produced by relaxation of liquid carbon dioxide or carbon dioxide pellets produced therefrom.
  • the shaped body is then comminuted mechanically, for example by grinding or crushing, to form a blasting medium of the desired average grain size of, for example, 1 mm to 5 mm. Breaking or grinding results in particles with a sharp-edged surface contour, which still supports the abrasive action of the particles in use.
  • the dry ice particles produced according to the invention are particularly suitable for the abrasive surface treatment of metal or plastic surfaces, for example surfaces of aluminum, iron, steel, polyethylene, PVC or composite materials.
  • the blasting agent is discharged in a known manner in a carrier gas jet to a surface to be treated.
  • a carrier gas for example
  • Compressed air or a pressurized gas such as nitrogen or carbon dioxide gas used.
  • Dry ice particles are subcooled before irradiation of the surface. This ensures that the particles of the abrasive do not already sublime completely or partially before reaching the surface to be irradiated.
  • Supercooling is achieved by storing the particles before irradiation at a temperature below the sublimation temperature of the particles, and / or by discharging the particles in a carrier gas stream whose temperature is below the sublimation temperature.
  • the dry ice particles used as blasting agents are particularly suitable for roughening a surface, in particular a metal or plastic surface, as a pre-treatment before painting or coating. Due to their high hardness, the carbon dioxide particles produced according to the invention have an abrasive effect which is not substantially inferior to that of conventional abrasive blasting abrasives, such as, for example, glass or plastic granules. In addition, they succeed in removing coatings from surfaces which can not be removed with conventionally produced dry ice snow or dry ice pellets or only with considerable expenditure of energy and / or blasting agent.
  • dry ice particles obtained by comminuting a shaped article produced by freezing liquid carbon dioxide are solid
  • Carbon dioxide were obtained, preferably as a blasting abrasive
  • the dry ice particles prepared according to the invention combine the advantages of conventional abrasive blasting agents with those of conventionally obtained carbon dioxide particles.

Landscapes

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

Abstract

Les surfaces doivent être rendues partiellement rugueuses avant d'appliquer une peinture et un revêtement. Cela se fait habituellement par exposition de la surface à des particules de sable ou de verre. Dans ce type de prétraitement, il en résulte un sable ou un autre agent de sablage qui peut contaminer la partie à nettoyer. En particulier, dans le domaine alimentaire, automobile et médical, les déplacements d'agents de sablage sont indésirables. Selon l'invention, lors du traitement de surfaces, on utilise un matériau de sablage qui se compose de dioxyde de carbone solide qui a été obtenu par congélation de dioxyde de carbone liquide. On obtient ainsi un agent de sablage qui sublime sans résidu. Par rapport aux particules de glace sèche qui ont été produits par compression de neige de dioxyde de carbone, l'agent de sablage de l'invention présente une dureté nettement plus élevée et permet une abrasion mécanique sensiblement plus forte de la surface traitée.
EP16745089.9A 2015-07-25 2016-07-22 Procédé de traitement de surfaces avec un agent de sablage constitué de particules de glace sèche Withdrawn EP3325215A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015009676.1A DE102015009676A1 (de) 2015-07-25 2015-07-25 Verfahren zum Behandeln von Oberflächen mit einem Strahlmittel aus Trockeneispartikeln
PCT/EP2016/067585 WO2017017034A1 (fr) 2015-07-25 2016-07-22 Procédé de traitement de surfaces avec un agent de sablage constitué de particules de glace sèche

Publications (1)

Publication Number Publication Date
EP3325215A1 true EP3325215A1 (fr) 2018-05-30

Family

ID=56555379

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16745089.9A Withdrawn EP3325215A1 (fr) 2015-07-25 2016-07-22 Procédé de traitement de surfaces avec un agent de sablage constitué de particules de glace sèche

Country Status (4)

Country Link
EP (1) EP3325215A1 (fr)
DE (1) DE102015009676A1 (fr)
MA (1) MA42476A (fr)
WO (1) WO2017017034A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021100111A1 (de) 2021-01-06 2022-07-07 BSW-Anlagenbau G.m.b.H. Verfahren zum Reinigen einer Trommel einer Tablettenbeschichtungsanlage
DE102022106559A1 (de) 2022-03-21 2023-09-21 Muyo Oberflächentechnik GmbH Verfahren und vorrichtung zur vorbehandlung eines bauteils vor einem beschichtungsprozess

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK550884A (da) * 1984-11-20 1986-05-21 Knud Erik Westergaard Fremgangsmaade og apparat til partikelblaesning med partikler af et materiale, der skifter tilstandsform
DE3738246A1 (de) * 1987-11-11 1989-05-24 Werner & Zeisse Gmbh & Co Verfahren und vorrichtung zum entfernen von beschichtungen und verunreinigungen
US4962891A (en) 1988-12-06 1990-10-16 The Boc Group, Inc. Apparatus for removing small particles from a substrate
US5445553A (en) 1993-01-22 1995-08-29 The Corporation Of Mercer University Method and system for cleaning a surface with CO2 pellets that are delivered through a temperature controlled conduit
GB9400838D0 (en) * 1994-01-18 1994-03-16 Mg Gas Products Ltd Production of solid carbon dioxide
US5616067A (en) 1996-01-16 1997-04-01 Ford Motor Company CO2 nozzle and method for cleaning pressure-sensitive surfaces
US6003332A (en) * 1997-06-02 1999-12-21 Cyrogenic Applications F, Inc. Process and system for producing high-density pellets from a gaseous medium
DE19807917A1 (de) 1998-02-25 1999-08-26 Air Liquide Gmbh Verfahren und Einrichtung zur Erzeugung eines zweiphasigen Gas-Partikel-Strahls, insbesondere mit CO¶2¶-Trockeneispartikeln
DE19926119C2 (de) 1999-06-08 2001-06-07 Fraunhofer Ges Forschung Strahlwerkzeug
US6416389B1 (en) * 2000-07-28 2002-07-09 Xerox Corporation Process for roughening a surface
DE10163852A1 (de) * 2003-03-03 2003-07-03 Otto Littmann Maschinenfabrik Vorrichtung zum Eisstrahlen
MXPA05003096A (es) 2002-09-20 2005-11-17 Wener Kipp Jens Metodo y dispositivo para limpieza con chorro.
DE102005054246C5 (de) 2005-11-15 2011-08-18 MESSER Group GmbH, 65843 Vorrichtung und Verfahren zum Bestrahlen einer Oberfläche mit Trockeneis-Teilchen
JP4241891B1 (ja) * 2008-07-23 2009-03-18 竹和工業株式会社 ブラスト洗浄方法とそれに用いる固体二酸化炭素の製造方法及び製造装置
ITMI20091630A1 (it) * 2009-09-24 2011-03-24 Mec Srl Impianto e procedimento per produrre pellet di anidride carbonica ghiacciata
DE102012017906A1 (de) 2012-09-11 2014-03-13 Peter Harst Strahlmittel und Verfahren zu dessen Herstellung
DE202015001801U1 (de) * 2015-03-04 2015-03-20 Robert Veit Herstellungsvorrichtung zum Erzeugen von agglomerierten gefrorenen Gaspartikeln

Also Published As

Publication number Publication date
WO2017017034A1 (fr) 2017-02-02
MA42476A (fr) 2018-05-30
DE102015009676A1 (de) 2017-01-26

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