US20190144984A1 - Method for masking a component that is intended to be coated with a thermal spray layer - Google Patents

Method for masking a component that is intended to be coated with a thermal spray layer Download PDF

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Publication number
US20190144984A1
US20190144984A1 US15/775,241 US201615775241A US2019144984A1 US 20190144984 A1 US20190144984 A1 US 20190144984A1 US 201615775241 A US201615775241 A US 201615775241A US 2019144984 A1 US2019144984 A1 US 2019144984A1
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US
United States
Prior art keywords
paste
masking
component
coated
critical mask
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Abandoned
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US15/775,241
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English (en)
Inventor
Alexander Michla
Philipp GASTEL
Alexander SOLLBERGER
Martin Stoeckli
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Oerlikon Metco AG
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Oerlikon Metco AG
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Filing date
Publication date
Application filed by Oerlikon Metco AG filed Critical Oerlikon Metco AG
Publication of US20190144984A1 publication Critical patent/US20190144984A1/en
Assigned to OERLIKON METCO AG, WOHLEN reassignment OERLIKON METCO AG, WOHLEN ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: STOECKLI, MARTIN
Assigned to OERLIKON METCO AG, WOHLEN reassignment OERLIKON METCO AG, WOHLEN ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RUSSO, DARIO
Assigned to OERLIKON METCO AG, WOHLEN reassignment OERLIKON METCO AG, WOHLEN ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GASTEL, Philipp, MICHLA, Alexander, SOLLBERGER, ALEXANDER
Abandoned legal-status Critical Current

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    • 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
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/01—Selective coating, e.g. pattern coating, without pre-treatment of the material to be coated
    • 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
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • 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
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying

Definitions

  • the present invention relates to a method for masking a part of the surface of a component, which is to be coated by thermal spraying.
  • Thermal spraying is a coating process, in which a material, for example in powder form, is continuously melted. The resulting droplets are thrown onto the surface to be coated, whereby flattened droplets accumulate on the surface.
  • the layers built up in this way lead to a coating, which may be, for example, harder, more brittle but also more porous than the uncoated component.
  • overlay masks are used, as described, for example, in JP 3158451 or U.S. Pat. No. 6,645,299.
  • adhesive masks made of adhesive tapes are used, which are affixed directly to the parts of the surface which are not to be coated.
  • WO2010/031370 A1 shows a short overview of the common masking methods in connection with thermal spraying.
  • a masking of a paint or of a binder-containing mixture to the area to be protected, as described for example in U.S. Pat. No. 4,464,430.
  • masking is done by means of dip coating by immersing the parts of the surface not to be coated by thermal spraying in an immersion bath.
  • this method is limited to very few geometries.
  • WO2010/031370 A1 itself a masking is described, which is made of an elastic material being slightly undersized. Among the materials described there are also elastomers, for example. When applying the masking to the component, the masking is very close to the component due to its undersize. This type of masking works especially well when the component has to be masked all around.
  • the present invention is based on the object of specifying a largely automated masking method, which allows the critical mask boundaries to be positioned with the required high accuracy.
  • the mask is realized at least along the critical mask boundaries by means of a paste which is dispensed by a nozzle.
  • a paste which is dispensed by a nozzle.
  • the term “paste” used in the present description means a liquid material having such a viscosity height that it can be applied to the surface of the component in the form of a sealing bead with any contour profile, without dissolving on the surface.
  • the paste is curable.
  • Viscosity has a great influence on the precision with which a sealing bead with its geometric characteristics (generation of shading) can be produced. For this reason, according to a preferred embodiment of the present invention, the paste and/or the component to be masked is processed and applied under a predetermined tempered environment (cooled).
  • curing can be made by evaporation of solvent contained in the paste.
  • curing is at least partially realized by crosslinking, particularly preferably by photo-induced crosslinking.
  • a UV curing paste is used. This is an advantage, among other things, because the paste just needs to be cured shortly after it has been applied to the component. In the course of thermal spraying, particularly if it is a plasma process, the component is exposed to intense UV radiation due to the plasma process, resulting in further curing and, ideally, complete curing. Due to the fact that the paste only has to be cured shortly, less expensive UV sources can be used and/or the UV irradiation time can be shortened.
  • masking is performed in two steps. Areas to be masked are accordingly masked using one of the methods, as they are already known from the state of the art, wherein, however, no masking with the correspondingly known means is provided in the area of the critical mask boundaries. So, this is a partial masking, wherein the areas around the critical mask boundaries are left blank. The areas around the critical mask boundaries are then masked according to this embodiment by means of the method mentioned above, i.e. masking paste is applied to these areas by means of at least one nozzle, thus completing the masking. In doing so, it is advantageous to consider that there is an overlap with the partial masking when the masking is completed, in order to ensure that no unmasked areas are formed between partial masking and completion masking.
  • the masking of relatively large areas which would take a lot of time with the paste process, can be applied quickly by means of a relative to the position relatively inaccurate method and the critical edge areas of the critical mask boundaries can be applied very precisely using the paste process.
  • the inaccurate method can be automated relatively easily.
  • the automation of the paste process is also possible. In the paste process, it is necessary that the place of the nozzle exit is moved relative to the areas close to the mask boundaries to be masked in the course of paste dispensing. In this case, either nozzle or component can be mounted on a robot.
  • the component would be mounted on the robot arm for smaller components to be masked, because in this case, the connection of the nozzle to the paste reservoir, which is usually ensured by hoses, is not exposed to any movement.
  • the nozzle on the robot arm. More generally, means for positioning and/or orientation of the component and/or means for positioning and/or orientation of the at least one nozzle may be provided.
  • a critical mask boundary is described by a precise sealing bead.
  • the non-critical mask boundaries can be divided into at least two categories, namely applying of e.g. simple covers.
  • covers cannot be attached to undercuts, or would possibly restrict the dispensing process.
  • a low-viscosity pasty material is used in a second dispenser. Due to the low viscosity, it coalesces and can therefore be applied over a wide area. Initially, the precise sealing beads are placed.
  • the paste is therefore preferably adapted to the material of the component to be masked in such a way that a contact angle of at least 90° is formed.
  • the mask thickness does not continuously increase at the critical mask boundary but forms an at least vertical, if not even overhanging wall.
  • the thermally sprayed layer is substantially interrupted at the critical mask boundary.
  • the contact angle exceeds 90, there is an increased shading effect, which contributes to the separation of the spray layers left and right of the critical mask boundary.
  • a second sealing bead is placed over the first sealing bead. This second sealing bead is applied in such a way that a reinforced overhang is realized resulting in a reinforcement of the shading effect.
  • the contact angle is defined similar to the contact angle at a boundary between a liquid and a solid, as, when the paste is applied, a contact angle is formed, wherein the contact angle does not change substantially during the entire process, regardless of whether the paste cures or not.
  • the angle is defined in the following as the angle of contact, which is enclosed by the surface of the component and a tangent at the surface of the sealing bead or a tangent at the surfaces of the double sealing beads at the boundary between the component and the sealing bead.
  • FIG. 1 illustrates the corresponding situation in which two overlying sealing beads 3 are applied to a component 1 in such a way that the contact angle is ⁇ >90° (visible at the left edge of the FIGURE).
  • a contact angle ⁇ 90 would not be optimal, because this can lead to problems of layer separation of the layer 5 (visible at the right edge of the FIGURE).

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Coating Apparatus (AREA)
US15/775,241 2015-11-12 2016-11-09 Method for masking a component that is intended to be coated with a thermal spray layer Abandoned US20190144984A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP15194293.5 2015-11-12
EP15194293 2015-11-12
PCT/EP2016/077167 WO2017081098A1 (fr) 2015-11-12 2016-11-09 Procédé pour masquer une pièce devant être revêtue d'une couche pulvérisée à chaud

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/077167 A-371-Of-International WO2017081098A1 (fr) 2015-11-12 2016-11-09 Procédé pour masquer une pièce devant être revêtue d'une couche pulvérisée à chaud

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US16/882,060 Continuation US20200283880A1 (en) 2015-11-12 2020-05-22 Method for masking a component that is intended to be coated with a thermal spray layer

Publications (1)

Publication Number Publication Date
US20190144984A1 true US20190144984A1 (en) 2019-05-16

Family

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Family Applications (2)

Application Number Title Priority Date Filing Date
US15/775,241 Abandoned US20190144984A1 (en) 2015-11-12 2016-11-09 Method for masking a component that is intended to be coated with a thermal spray layer
US16/882,060 Abandoned US20200283880A1 (en) 2015-11-12 2020-05-22 Method for masking a component that is intended to be coated with a thermal spray layer

Family Applications After (1)

Application Number Title Priority Date Filing Date
US16/882,060 Abandoned US20200283880A1 (en) 2015-11-12 2020-05-22 Method for masking a component that is intended to be coated with a thermal spray layer

Country Status (7)

Country Link
US (2) US20190144984A1 (fr)
EP (1) EP3374534B1 (fr)
JP (2) JP6876041B2 (fr)
CN (1) CN108603274A (fr)
CA (1) CA3004380A1 (fr)
RU (1) RU2729687C2 (fr)
WO (1) WO2017081098A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202021105511U1 (de) 2021-10-12 2023-01-17 Weidplas Gmbh Vorrichtung zum Maskieren eines Bauteils und Vorrichtung zum Beschichten eines Bauteils
DE102023120644A1 (de) 2023-08-03 2025-02-06 MTU Aero Engines AG Maskierungsmittel zum Abdecken eines Oberflächenbereichs eines Bauteils einer Strömungsmaschine und Verfahren zum Bearbeiten eines Bauteils einer Strömungsmaschine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5695659A (en) * 1995-11-27 1997-12-09 United Technologies Corporation Process for removing a protective coating from a surface of an airfoil
US5786028A (en) * 1996-09-05 1998-07-28 Cantwell; Jay S. Masking tape and method
US5786208A (en) * 1993-11-29 1998-07-28 Gen-Probe Incorporated Method for extracting nucleic acids from a wide range of organisms
US20140191201A1 (en) * 2013-01-08 2014-07-10 OLEDWorks LLC Apparatus and Method for Making OLED Lighting Device
US20140234555A1 (en) * 2013-02-21 2014-08-21 Pratt & Whitney Canada Corp. Method of protecting a surface
US20150231665A1 (en) * 2014-02-14 2015-08-20 United Technologies Corporation Spray Masking for Rotors

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4464430A (en) 1981-02-26 1984-08-07 Alloy Surfaces Company, Inc. Metal diffusion
JPS59160569A (ja) * 1983-03-03 1984-09-11 Sumitomo Metal Ind Ltd 部分溶射方法
JP3158451B2 (ja) 1991-01-29 2001-04-23 豊田工機株式会社 測定ヘッドバランス装置
JPH05111666A (ja) * 1991-10-23 1993-05-07 Yoshikawa Kogyo Co Ltd 溶射加工におけるマスキング方法
JP3157990B2 (ja) * 1994-08-26 2001-04-23 日本ペイント株式会社 吹き付け塗工におけるマスキング方法および吹き付け塗工方法
DE60004798T3 (de) * 1999-05-27 2007-08-16 Patterning Technologies Ltd. Verfahren zur erzeugung einer maske auf einer oberfläche
US6645299B2 (en) 2001-09-18 2003-11-11 General Electric Company Method and assembly for masking
FR2863191B1 (fr) * 2003-12-04 2007-04-20 Snecma Moteurs Masque de protection pour le traitement de surface d'aubes de turbomachines
US8033013B2 (en) * 2008-06-30 2011-10-11 Compeq Manufacturing Co., Ltd. Method of making rigid-flexible printed circuit board having a peelable mask
DE102008048127A1 (de) * 2008-09-20 2010-03-25 Mtu Aero Engines Gmbh Vorrichtung und Verfahren zum Maskieren einer Bauteilzone
JP5359180B2 (ja) * 2008-10-20 2013-12-04 マツダ株式会社 マスキング部材及びマスキング部材を用いた被膜形成方法
RU2442816C1 (ru) * 2010-12-17 2012-02-20 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Установка очистки нефти от сероводорода и низкомолекулярных меркаптанов

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5786208A (en) * 1993-11-29 1998-07-28 Gen-Probe Incorporated Method for extracting nucleic acids from a wide range of organisms
US5695659A (en) * 1995-11-27 1997-12-09 United Technologies Corporation Process for removing a protective coating from a surface of an airfoil
US5786028A (en) * 1996-09-05 1998-07-28 Cantwell; Jay S. Masking tape and method
US20140191201A1 (en) * 2013-01-08 2014-07-10 OLEDWorks LLC Apparatus and Method for Making OLED Lighting Device
US20140234555A1 (en) * 2013-02-21 2014-08-21 Pratt & Whitney Canada Corp. Method of protecting a surface
US20150231665A1 (en) * 2014-02-14 2015-08-20 United Technologies Corporation Spray Masking for Rotors

Also Published As

Publication number Publication date
RU2018119475A3 (fr) 2020-03-25
US20200283880A1 (en) 2020-09-10
CN108603274A (zh) 2018-09-28
EP3374534A1 (fr) 2018-09-19
WO2017081098A1 (fr) 2017-05-18
RU2018119475A (ru) 2019-12-13
EP3374534B1 (fr) 2021-05-26
JP2021046615A (ja) 2021-03-25
RU2729687C2 (ru) 2020-08-11
JP2018537583A (ja) 2018-12-20
JP6876041B2 (ja) 2021-05-26
CA3004380A1 (fr) 2017-05-18

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