EP0725159B1 - Procédé de revêtement - Google Patents

Procédé de revêtement Download PDF

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Publication number
EP0725159B1
EP0725159B1 EP96100605A EP96100605A EP0725159B1 EP 0725159 B1 EP0725159 B1 EP 0725159B1 EP 96100605 A EP96100605 A EP 96100605A EP 96100605 A EP96100605 A EP 96100605A EP 0725159 B1 EP0725159 B1 EP 0725159B1
Authority
EP
European Patent Office
Prior art keywords
coating
substrate
active ingredient
layer
islands
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.)
Expired - Lifetime
Application number
EP96100605A
Other languages
German (de)
English (en)
Other versions
EP0725159A1 (fr
Inventor
Wilhelm Dr. Funk
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.)
Maschinenfabrik Rieter AG
Original Assignee
Maschinenfabrik Rieter AG
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 Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP0725159A1 publication Critical patent/EP0725159A1/fr
Application granted granted Critical
Publication of EP0725159B1 publication Critical patent/EP0725159B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • 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
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06—Metallic material
    • 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
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06—Metallic material
    • C23C4/08—Metallic material containing only metal elements
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/252—Glass or ceramic [i.e., fired or glazed clay, cement, etc.] [porcelain, quartz, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/256—Heavy metal or aluminum or compound thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/256—Heavy metal or aluminum or compound thereof
    • Y10T428/257—Iron oxide or aluminum oxide

Definitions

  • This invention relates to the coating of articles (e.g. Components) and on objects with appropriate coatings.
  • the invention is especially but not exclusively for use in the Coating of thread-guiding elements designed, especially of Elements for guiding threads, synthetic fibers or filaments exhibit (e.g. stretching rolls for chemical fiber plants).
  • the Invention is particularly interesting in the manufacture of elements related to freestanding surfaces have a catalytic effect to the To achieve decomposition of deposits on these surfaces. This can a self-cleaning effect can be brought about.
  • the decomposition can by the action of oxygen from the air.
  • it can also be a catalytic effect in the general sense, e.g. for better Combustion of exhaust gases or for the catalysis of chemical processes of all Art.
  • a thread-guiding element according to the invention is on the thread-guiding surface provided a coating with a catalytic effect, and according to the invention other features listed in the characterizing part of the first claim on one Surface of the object a layer of a treatment material by means of a thermal spray process is formed and an active ingredient is co-injected with the treatment material.
  • the treatment material can form a protective layer, e.g. against wear, corrosion or similar damage is particularly resistant. Ceramic layers are particularly well suited for this purpose.
  • the active ingredient can accordingly in all layers or only in predetermined Layers of the treatment layer are provided.
  • the use of the Active ingredient in individual selected locations is preferred where the Active ingredient itself is expensive (e.g. platinum) and its effect only on a certain one Surface (e.g. on a free-standing surface).
  • thermal spraying includes at least plasma spraying, Flame spraying, high speed flame spraying (HVOF) and detonation coating.
  • a spraying process requires the supply of injectable material in the mold of particles with a predetermined minimum u. Maximum size. This Particles can be roughly spherical prior to spraying, but become Impact on the workpiece "flattened", being in the forming Layer are embedded, or merge with this layer. It This creates a permanent connection between each newly arriving particle and the existing layer-forming material. The result is a composite material the "islands" of the active substance in the substrate of the Includes material.
  • the particles can have a size of approx. 10 ⁇ m before spraying, such particles are not respirable.
  • the particle size influences the Surface finish. It can be sprayed with surfaces Roughness values between Ra 0.1 ⁇ m and 10 ⁇ m can be generated. The Connections within the layer are so tight that the product can be sanded or brushed.
  • the invention further provides a thread guiding element, in particular a component, which is provided with a coating formed by thermal spraying, an active ingredient being embedded in the coating by co-injection, that the active ingredient on a free-standing surface of the object Comes out.
  • the coating can be formed in such a way that discrete islands of a predetermined active ingredient in the substrate of the Coating divided and embedded or edged therein.
  • the active ingredient can make up about 50% of the total weight of the coating represent, usually up to 10% (especially between 2% and 10%) of this weight as an active ingredient to achieve the desired effect should be enough.
  • the substrate can be formed from a material that is resistant to wear and tear while producing a predetermined surface quality, e.g. achieving one predetermined roughness value or (in cooperation with a predetermined Mating surface) coefficient of friction.
  • Fig. 1 shows schematically in cross section a protective cabin 10, the one Robot 12 and a workpiece carrier 14 envelops.
  • the robot 12 is in accordance with a conventional design today and includes a drive system (not shown), that can be controlled by a programmable controller 16.
  • the controller 16 is integrated in a control panel (not shown) which is provided outside the cabin 10.
  • the drive (not shown) of the workpiece carrier is controlled by the same controller 16.
  • the holder 14 carries a cylindrical workpiece 18, which is driven by the Holder 14 are rotated about the axis 20 at a predetermined speed can.
  • the robot 12 can be controlled by a gripper 22 to move back and forth in axial directions relative to the workpiece 18.
  • the gripper 22 carries a spray gun 24, the mouth part of which follows is described in more detail with reference to Figure 2.
  • the gun 24 is with two Provide powder injectors 26,28, each with a flexible line 30,32 a respective wettable powder storage 34, 36 are connected.
  • a Transport gas supply (not shown) is connected to each store 34, 36, so that when the gas supply is activated, powder from at least one store 34 or 36 can be supplied via the respective injector 26, 28.
  • the transport gas supply can be activated selectively from the control panel.
  • the mouth portion of the gun 24 includes a tube 38 with an open end, which faces the workpiece 18.
  • An electrode 40 is in the tube 38 provided, and an arc (plasma) 42 is generated in operation, which extends to the workpiece 18 and a transport path in the direction of Workpiece 18 forms.
  • the injector 28 (and / or 26) emerging powder particles 44 introduced and immediately in the direction of the workpiece 18 entrained and against the one currently opposite Surface part 46 of the workpiece 18 flung.
  • the temperature of the plasma is so high that the powder particles 44 partially melt before they reach the surface of the workpiece 18. There arrived, but they are pressed flat on the surface portion 46, where they give off their heat to the workpiece 18 and solidify immediately. Thereby connect with the material they encounter.
  • a thin layer also called “lamella", not shown
  • a layer 50 Fig. 3 of the sprayed Material on the surface of the workpiece 18.
  • the thickness of the lamella depends i.a. powder feed rate and quantity and linear speed the gun 24 in the axial direction of the workpiece 18. If each layer is formed the same, the thickness of layer 50 depends on that Number of repetitions of layer formation. More details of the Spray technology are from the aforementioned treatise by the company Plasmatechnik AG, or from the general literature.
  • FIG. 3 shows schematically an example of the structures made possible by this invention become.
  • the greatest part of the layer thickness is in this case a substrate material 52, wherein during the formation of individual Lay a second material (an active ingredient) is injected, and forms discrete "Islands" 54, which are embedded or enclosed in the substrate 52.
  • the active ingredient is only used during the formation of the last one Was supplied to the arc, so that at least individual islands 54 of free-standing surface 56 of layer 50 appear.
  • the system could be set so that practically all islands 54 at least appear partially on the surface 56, which is particularly interesting is when the active ingredient to achieve a certain effect on the Surface 56 is provided.
  • an "active ingredient” can be influenced by the environment, e.g. among other things from the temperature and working atmosphere, e.g. of the Air composition or air circulation.
  • the component can therefore Installation in an aggregate, which is a suitable "environment” guaranteed or enabled, e.g. contains a heater (around a maintain a predetermined or a minimum temperature) or a Extraction or supply includes (e.g. to remove vapors or fresh air or supply gases).
  • the component normally becomes Mounting in a predetermined unit may be suitable, e.g. as Rod are formed, which is held in a liquid (flow) by means of a holder is immersed to act as a catalyst for predetermined chemical reactions to serve this liquid.
  • the well-known problem of "poisoning" must naturally be taken into account when selecting the active ingredient.
  • the catalyst should have a "self-cleaning" effect, it can be used Oxidation of deposits can be provided. In this case it is natural important that oxygen also interacts with both the catalyst as well as with the material to be oxidized. To accomplish this Requirement, it may be important to over the active ingredient as evenly as possible distribute the area to be protected so that the drug islands are not all can be covered. A spraying process with a suitable selection of the Particle size and uniformity of the application comes to fulfillment contrary to this distribution task.
  • the invention is not based on the use of a ceramic Treatment material restricted. Any injectable material could Form substrate.
  • the ceramic materials are for this purpose particularly interesting because of its wear resistance.
  • a high abrasion resistance is associated with thread guiding Elements of particular importance, but less so in other cases be important.
  • the invention could e.g. related to manufacturing used by self-cleaning walls for baking ovens - cf. e.g. US-A-3266477 - where catalytic activity is also important, abrasion resistance (compared e.g. with a stretching roller) can be very low.
  • the selection of the active ingredient to achieve a catalytic effect must also be made with regard to the end use.
  • a great many materials are suitable for acting as catalysts in a suitable environment, even metal oxides (Al 2 0 3 , TiO 2 ), which are also resistant to wear. The selection is therefore in no way limited to the precious metals.
  • the simultaneous delivery of both the substrate material and the Active ingredient can take place in that the memory 34 (FIG. 1) with the Substrate powder and the memory 36 are filled with the active ingredient powder and the transport gas is fed to both stores 34, 36. But this becomes too Problems arise where the amount of active ingredient is only a fraction of that The amount of substrate material is. In the latter case, however, a powder mixture mixed with the predetermined proportions of the two components and filled into a memory 34 or 36. Where the active ingredient is should appear in individual layers, the transport gas supply to the suitable time switched on or off the corresponding memory be provided with a different wettable powder in the other store can be.
  • the workpiece 18 is the godet (ie the thread-carrying part) of a draw roll unit for use in the spinning of continuous filaments made of synthetic polymers. Designs of such units are shown, for example in EP-A-454618 and in our Swiss patent application No. 925/94 of March 28, 1994 (PCT / CH94 / 00104).
  • the godet itself is made of steel and its outer cylindrical surface (over which the filaments run during operation) is prepared for receiving a protective layer 50 (FIG. 3) according to the known measures of spray technology. 1, a layer 50 with Al 2 O 3 as a substrate with a total thickness of, for example, 150 ⁇ m is built up.
  • the binding of the active ingredient (platinum) to the ceramic is so strong that the coated godet can then be ground to a to produce predetermined surface quality without doing an essential one Platinum loss in surface 56 must be accepted.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Catalysts (AREA)

Claims (8)

  1. Un élément guidant le fil, lequel est pourvu, sur la surface guidant le fil, d'une enduction (50) ayant un effet catalytique,
    caractérisé par le fait que
    l'enduction (50) est formée par projection thermique d'un substrat (52) (appelé également matière de traitement), et où l'effet catalytique dans l'enduction est réalisé par au moins un agent (54) qui est projeté avec le substrat (52) d'une manière prédéterminée,
    l'agent est au moins partiellement fusionné dans le substrat, de telle sorte que des íles discrètes (54), formées par l'agent prédéterminé, sont réparties dans le substrat de l'enduction, et y sont encastrées respectivement enchâssées, afin d'obtenir, suivant le procédé de l'agent projeté,
    une décomposition catalytique des dépôts, ou
    une augmentation de la tenacité du substrat, ou
    une amélioration de la force d'adhérence du substrat.
  2. Elément selon revendication 1,
    caractérisé par le fait que,
    pour produire un effet catalytique, les íles (54) sont formées de platine, et sont situées sur la surface, dans les dernières couches, afin d'obtenir la décomposition des dépôts sur de telles surfaces.
  3. Elément selon revendication 1,
    caractérisé par le fait que,
    sur la surface (46), dans les premières couches, les íles (54) sont formées de moyens d'adhérence, tels que nickel-aluminium ou chrome-nickel, afin d'améliorer l'adhésivité de la couche (50) sur la pièce d'oeuvre (18).
  4. Elément selon revendication 1,
    caractérisé par le fait que
    les íles (54) sont formées d'un alliage chrome-nickel, et sont réparties sur toute l'épaisseur de la couche (50), afin d'augmenter, par cela, la tenacité de la couche, et où d'autres matières premières peuvent être utilisées dans cette catégorie, comme le fer, le molybdène, l'aluminium et alliages de ces métaux, ou CERMETS, ou de céramique d'oxyde relativement ductile.
  5. Elément selon revendication 1,
    caractérisé par le fait que
    le substrat (52) est formé par une matière céramique.
  6. Elément selon revendication 1,
    caractérisé par le fait que
    le substrat (52) est formé par une matière qui est résistante en ce qui concerne l'usure, et qui permet en même temps, de réaliser une qualité de surface prédéterminée, et où les liaisons, à l'intérieur de la couche, sont résistantes à tel point que la surface peut être rectifiée ou brossée.
  7. Elément selon revendications 1,
    caractérisé par le fait que
    l'agent représente jusqu'à environ 50% du poids total de l'enduction, et où, dans le but d'obtenir l'effet désiré, on a normalement jusqu'à 10%, de préférence entre 2 et 10% du poids.
  8. Elément selon revendications 1,
    caractérisé par le fait que
    la couche de substrat possède une épaisseur de couche d'environ 150 µm, et que, sur la couche extérieure, l'agent est présent entre 10 à 20 µm.
EP96100605A 1995-01-31 1996-01-17 Procédé de revêtement Expired - Lifetime EP0725159B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH25395 1995-01-31
CH253/95 1995-01-31
CH25395 1995-01-31

Publications (2)

Publication Number Publication Date
EP0725159A1 EP0725159A1 (fr) 1996-08-07
EP0725159B1 true EP0725159B1 (fr) 1999-12-01

Family

ID=4182803

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96100605A Expired - Lifetime EP0725159B1 (fr) 1995-01-31 1996-01-17 Procédé de revêtement

Country Status (8)

Country Link
US (1) US5897947A (fr)
EP (1) EP0725159B1 (fr)
JP (1) JPH08239747A (fr)
KR (1) KR960028982A (fr)
CN (1) CN1177077C (fr)
CA (1) CA2168450A1 (fr)
DE (1) DE59603741D1 (fr)
TW (1) TW383233B (fr)

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DE19860495A1 (de) * 1998-12-28 2000-07-06 Siemens Ag Verfahren zur Herstellung eines Katalysatorkörpers sowie Katalysatorkörper
DE10023303A1 (de) * 2000-05-15 2002-04-18 Euromat Ges Fuer Werkstofftech Verfahren zum Aufbringen einer Schicht aus Edelmetall und/oder einer Edelmetallegierung sowie deren Verwendung
DE102010035639A1 (de) 2009-09-21 2011-04-07 Oerlikon Textile Gmbh & Co. Kg Vorrichtung zur Führung eines synthetischen Fadens
DE102010035584A1 (de) 2009-09-22 2011-03-24 Oerlikon Textile Gmbh & Co. Kg Bauteil zur Führung eines synthetischen Fadens
DE102022002576A1 (de) * 2022-07-14 2024-01-25 Oerlikon Textile Gmbh & Co. Kg Galette zum Fördern, Transportieren und / oder Strecken eines Fadens

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Also Published As

Publication number Publication date
DE59603741D1 (de) 2000-01-05
EP0725159A1 (fr) 1996-08-07
CN1133898A (zh) 1996-10-23
CA2168450A1 (fr) 1996-08-01
JPH08239747A (ja) 1996-09-17
TW383233B (en) 2000-03-01
KR960028982A (ko) 1996-08-17
CN1177077C (zh) 2004-11-24
US5897947A (en) 1999-04-27

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