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EP0781170A1 - Device for projecting a magnetic element charged coating - Google Patents

Device for projecting a magnetic element charged coating

Info

Publication number
EP0781170A1
EP0781170A1 EP95931244A EP95931244A EP0781170A1 EP 0781170 A1 EP0781170 A1 EP 0781170A1 EP 95931244 A EP95931244 A EP 95931244A EP 95931244 A EP95931244 A EP 95931244A EP 0781170 A1 EP0781170 A1 EP 0781170A1
Authority
EP
European Patent Office
Prior art keywords
coating
gun
ferrite ring
projecting
magnetic elements
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
Application number
EP95931244A
Other languages
German (de)
French (fr)
Other versions
EP0781170B1 (en
Inventor
Jean-Jacques Bodin
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.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
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 Commissariat a lEnergie Atomique CEA filed Critical Commissariat a lEnergie Atomique CEA
Publication of EP0781170A1 publication Critical patent/EP0781170A1/en
Application granted granted Critical
Publication of EP0781170B1 publication Critical patent/EP0781170B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/12—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain a coating with specific electrical properties

Definitions

  • the invention relates to a device for projecting a coating loaded with magnetic elements onto surfaces of different sizes and complexities. It finds an application in the field of industrial painting.
  • the magnetic elements contained in this coating must be oriented.
  • a known method for orienting the magnetic elements of the coating consists in placing the surface to be covered in a magnetic field and then in coating this surface with the appropriate coating according to a conventional technique for those skilled in the art. This technique involves using a projection. According to this method, when the coating comes close to the surface to be covered, the magnetic elements, subjected to the magnetic field prevailing around the surface, are placed along the field lines created by this magnetic field. The coating whose magnetic elements are oriented can then be dried or polymerized.
  • the object of the invention is precisely to remedy this drawback. To this end, it proposes a device for projecting a coating in which the magnetic field is created around the nozzle of the spray gun so as to orient the magnetic elements as soon as they exit the gun.
  • the invention relates to a device for projecting a coating loaded with magnetic elements, comprising a spray gun capable of projecting the coating onto a chosen surface.
  • This projection device is characterized by the fact that it includes means for orienting the magnetic elements of the coating, these orientation means being fixed around the projection gun.
  • the orientation means comprise a ferrite ring surrounding the spray gun and around which is wound an electrically conductive wire connected to a source power supply to create a magnetic field inside the ferrite ring.
  • This ferrite ring has an air gap allowing, on the one hand, the passage of the coating when it is projected by the gun and, on the other hand, the orientation of the magnetic elements of this projected coating.
  • the orientation means comprise a shielding cylinder positioned between the gun and the ferrite ring to protect said gun from the magnetic field created by the ferrite ring, and prevent the magnetized elements from obstructing the gun.
  • This shielding cylinder has an opening of section substantially greater than the section of the air gap of the ferrite ring.
  • the projection device according to the invention can be installed on a robot.
  • the single figure schematically represents the device of the invention comprising a spray gun surrounded by means for orienting the magnetic elements of the coating.
  • the device of the invention is shown in perspective.
  • This device comprises a projection gun referenced 1.
  • This projection gun is of the entirely conventional type.
  • it can be automatic.
  • This gun is connected to compressed air and coating supplies, not shown in the figure for the sake of simplification.
  • This figure also shows a ferrite ring 3 disposed around this projection gun 1.
  • This ferrite ring 3 is itself surrounded, at least in part, by an electrically conductive wire called a winding wire. 5.
  • This winding wire 5, preferably made of copper, is wound in multilayers around the ferrite ring 3 and connected to a DC power supply 8 stabilized in order to create in the ring 3 a magnetic field.
  • the ferrite ring 3 comprises an opening providing an air gap 7. This opening allows the coating sent by the gun 1 to pass to the surface to be covered. The magnetic field prevailing in this air gap 7 then makes it possible to orient the magnetic elements contained in the coating when the latter crosses the air gap 7 and until it is applied to the part to be coated.
  • the ferrite ring 3 is made based on nickel and zinc. It has a width of 90 mm, an outside diameter of 280 mm, an inside diameter of 250 mm and, therefore, a thickness of 15 mm.
  • the air gap 7 has a width of approximately 50 mm.
  • a shielding cylinder 2 is positioned between the spray gun 1 and the ferrite ring 3. More precisely, the ferrite ring 3 is fixed, by its inner face, to the shielding cylinder 2. This shielding cylinder 2 is further capable of supporting the spray gun 1 which is fixed on the inner face of this cylinder.
  • this shielding cylinder is made of mild steel and has an outside diameter of 210 mm and a length of 200 mm.
  • the shielding cylinder 2 makes it possible to prevent undesirable field lines from disturbing the supply of paint, resin or slip to the spray gun.
  • this shielding cylinder 2 has an opening 4 substantially aligned with the air gap 7 to allow the coating to pass from the gun 1 to the surface to be covered. It is specified that the pistol moves parallel to the opening 4, that is to say in the direction suggested by the double arrow 9.
  • the opening 4 of the shielding cylinder has a section substantially greater than that of the air gap 7 so that the entire coating emitted by the gun 1 can be subjected to the magnetic field of the air gap 7.
  • the projection gun 1 is therefore centered inside the shielding cylinder 2 and then fixed on this shielding cylinder so as to be in the axis of the ferrite ring 3. In this way, the nozzle of the projection gun opens into the air gap 7.
  • the supply in direct current must first be turned on so that a magnetic field is created in the gap 7 of the ferrite ring 3.
  • the automatic projection of the coating can then be performed.
  • Magnetic elements contained in the coating projected by the spray gun 1 are deposited on the surface to be covered after being oriented from the time of their passage in the air gap 7, until the time of application.
  • the nozzle of the projection gun must be distant from the surface to be covered by approximately 70 to 80 mm, or even 20 mm relative to the outer surface of the ferrite ring 3.
  • the device described above is on board a robot. There is also shown in broken lines in the figure, a portion of a robot arm 6 fixed on the shielding cylinder 2.
  • This device therefore has the advantage of allowing the recovery of all types of surfaces and, in particular, of surfaces located in a hostile environment since it can be installed on a robot arm.

Landscapes

  • Electrostatic Spraying Apparatus (AREA)
  • Nozzles (AREA)
  • Spray Control Apparatus (AREA)

Abstract

Device, which can be carried by a robot (6), for spraying a magnetic element charged coating. The device comprises a spray gun (1) provided with means (2, 3, 5) for creating a magnetic field and orienting the magnetic coating elements at the gun outlet. The invention is for use in industrial painting.

Description

DISPOSITIF DE PROJECTION D'UN REVETEMENT CHARGE D'ELEMENTS MAGNETIQUES DEVICE FOR PROJECTING A COATING LOADED WITH MAGNETIC ELEMENTS
Domaine de l'inventionField of the invention
L'invention a pour objet un dispositif pour projeter un revêtement chargé d'éléments magnétiques sur des surfaces de tailles et de complexités différentes. Elle trouve une application dans le domaine de la peinture industrielle.The invention relates to a device for projecting a coating loaded with magnetic elements onto surfaces of different sizes and complexities. It finds an application in the field of industrial painting.
Etat de la techniqueState of the art
Dans l'industrie, il est quelquefois nécessaire de recouvrir des surfaces, souvent de dimensions importantes ou complexes, d'une peinture, d'une résine ou d'une barbotine (eau + céramique) chargée en fibres magnétiques (ou éléments magnétiques) . Ces peintures ou résines chargées en fibres magnétiques sont généralement utilisées pour leurs propriétés radioélectriques spécifiques.In industry, it is sometimes necessary to cover surfaces, often of large or complex dimensions, with a paint, a resin or a slip (water + ceramic) loaded with magnetic fibers (or magnetic elements). These paints or resins loaded with magnetic fibers are generally used for their specific radioelectric properties.
Dans la suite de la description, on parlera, plus généralement, de revêtements chargés en éléments ou particules magnétiques et destinés à recouvrir une surface.In the following description, we will speak, more generally, of coatings loaded with magnetic elements or particles and intended to cover a surface.
Toutefois, pour assurer au revêtement toute son efficacité, les éléments magnétiques contenus dans ce revêtement doivent être orientés. Un procédé connu pour orienter les éléments magnétiques du revêtement consiste à placer la surface à recouvrir dans un champ magnétique puis à revêtir cette surface avec le revêtement adéquat selon une technique classique pour l'homme du métier. Cette technique consiste à utiliser un pistolet de projection. Selon ce procédé, au moment où le revêtement arrive à proximité de la surface à recouvrir, les éléments magnétiques, soumis au champ magnétique régnant autour de la surface, se placent suivant les lignes de champ créées par ce champ magnétique. Le revêtement dont les éléments magnétiques sont orientés peut alors être séché ou polymérisé.However, to ensure the effectiveness of the coating, the magnetic elements contained in this coating must be oriented. A known method for orienting the magnetic elements of the coating consists in placing the surface to be covered in a magnetic field and then in coating this surface with the appropriate coating according to a conventional technique for those skilled in the art. This technique involves using a projection. According to this method, when the coating comes close to the surface to be covered, the magnetic elements, subjected to the magnetic field prevailing around the surface, are placed along the field lines created by this magnetic field. The coating whose magnetic elements are oriented can then be dried or polymerized.
Un tel procédé est, cependant, difficile à mettre en oeuvre dans l'industrie puisqu'il n'est guère envisageable de réaliser des dispositifs générateurs de champ magnétique suffisamment importants pour contenir des pièces de forme complexe ou de volume important.Such a method is, however, difficult to implement in industry since it is hardly conceivable to produce magnetic field generating devices large enough to contain parts of complex shape or of large volume.
Exposé de l'inventionStatement of the invention
L'invention a justement pour but de remédier à cet inconvénient. A cette fin, elle propose un dispositif de projection d'un revêtement dans lequel le champ magnétique est créé aux alentours de la buse du pistolet de projection de façon à orienter les éléments magnétiques dès leur sortie du pistolet.The object of the invention is precisely to remedy this drawback. To this end, it proposes a device for projecting a coating in which the magnetic field is created around the nozzle of the spray gun so as to orient the magnetic elements as soon as they exit the gun.
De façon plus précise, l'invention concerne un dispositif de projection d'un revêtement chargé d'éléments magnétiques, comprenant un pistolet de projection apte à projeter le revêtement sur une surface choisie. Ce dispositif de projection est caractérisé, par le fait qu'il comporte des moyens d'orientation des éléments magnétiques du revêtement, ces moyens d'orientation étant fixés autour du pistolet de projection.More specifically, the invention relates to a device for projecting a coating loaded with magnetic elements, comprising a spray gun capable of projecting the coating onto a chosen surface. This projection device is characterized by the fact that it includes means for orienting the magnetic elements of the coating, these orientation means being fixed around the projection gun.
Avantageusement, les moyens d'orientation comprennent un anneau de ferrite entourant le pistolet de projection et autour duquel est enroulé un fil conducteur d'électricité connecté sur une source d'alimentation électrique pour créer à l'intérieur de l'anneau de ferrite un champ magnétique.Advantageously, the orientation means comprise a ferrite ring surrounding the spray gun and around which is wound an electrically conductive wire connected to a source power supply to create a magnetic field inside the ferrite ring.
Cet anneau de ferrite comporte un entrefer permettant, d'une part, le passage du revêtement lorsque celui-ci est projeté par le pistolet et, d'autre part, l'orientation des éléments magnétiques de ce revêtement projeté.This ferrite ring has an air gap allowing, on the one hand, the passage of the coating when it is projected by the gun and, on the other hand, the orientation of the magnetic elements of this projected coating.
Selon l'invention, les moyens d'orientation comprennent un cylindre de blindage positionné entre le pistolet et l'anneau de ferrite pour protéger ledit pistolet du champ magnétique créé par l'anneau de ferrite, et empêcher que les éléments magnétisés n'obstruent le pistolet.According to the invention, the orientation means comprise a shielding cylinder positioned between the gun and the ferrite ring to protect said gun from the magnetic field created by the ferrite ring, and prevent the magnetized elements from obstructing the gun.
Ce cylindre de blindage comporte une ouverture de section sensiblement supérieure à la section de l'entrefer de l'anneau de ferrite.This shielding cylinder has an opening of section substantially greater than the section of the air gap of the ferrite ring.
Selon un mode de réalisation de l'invention,, le dispositif de projection conforme à l'invention peut être embarqué sur un robot.According to one embodiment of the invention, the projection device according to the invention can be installed on a robot.
Brève description des dessinsBrief description of the drawings
La figure unique représente schématiquement le dispositif de l'invention comportant un pistolet de projection entouré des moyens pour orienter les éléments magnétiques du revêtement.The single figure schematically represents the device of the invention comprising a spray gun surrounded by means for orienting the magnetic elements of the coating.
Description détaillée de modes de réalisation de 1 'inventionDetailed description of embodiments of the invention
Sur la figure, on a représenté le dispositif de l'invention en perspective. Ce dispositif comporte un pistolet de projection référencé 1. Ce pistolet de projection est de type tout à fait classique. Il peut être, avantageusement, automatique. On peut utiliser, par exemple, les pistolets de projection automatique Kremlin® A1915N13 et A1918N13 destiné aux produits épais et fluides.In the figure, the device of the invention is shown in perspective. This device comprises a projection gun referenced 1. This projection gun is of the entirely conventional type. Advantageously, it can be automatic. We can use, for example, the Kremlin® automatic spray guns A1915N13 and A1918N13 intended for thick and fluid products.
Ce pistolet est raccordé à des alimentations en air comprimé et en revêtement, non représentées sur la figure par mesure de simplification.This gun is connected to compressed air and coating supplies, not shown in the figure for the sake of simplification.
Cette figure montre, en outre, un anneau de ferrite 3 disposé autour de ce pistolet de projection 1. Cet anneau de ferrite 3 est lui-même entouré, au moins sur une partie, d'un fil conducteur d'électricité appelé fil de bobinage 5. Ce fil de bobinage 5, de préférence en cuivre, est enroulé en multicouches autour de l'anneau de ferrite 3 et connecté sur une alimentation 8 stabilisée en courant continu afin de créer dans l'anneau 3 un champ magnétique.This figure also shows a ferrite ring 3 disposed around this projection gun 1. This ferrite ring 3 is itself surrounded, at least in part, by an electrically conductive wire called a winding wire. 5. This winding wire 5, preferably made of copper, is wound in multilayers around the ferrite ring 3 and connected to a DC power supply 8 stabilized in order to create in the ring 3 a magnetic field.
Selon l'invention, l'anneau de ferrite 3 comprend une ouverture réalisant un entrefer 7. Cette ouverture permet le passage du revêtement envoyé par le pistolet 1 vers la surface à recouvrir. Le champ magnétique régnant dans cet entrefer 7 permet alors d'orienter les éléments magnétiques contenus dans le revêtement lorsque ce dernier traverse l'entrefer 7 et jusqu'à ce qu'il s'applique sur la pièce à revêtir.According to the invention, the ferrite ring 3 comprises an opening providing an air gap 7. This opening allows the coating sent by the gun 1 to pass to the surface to be covered. The magnetic field prevailing in this air gap 7 then makes it possible to orient the magnetic elements contained in the coating when the latter crosses the air gap 7 and until it is applied to the part to be coated.
Selon un mode de réalisation de l'invention, l'anneau de ferrite 3 est réalisé à base de nickel et de zinc. Il a une largeur de 90 mm, un diamètre extérieur de 280 mm, un diamètre intérieur de 250 mm et, par conséquent, une épaisseur de 15 mm. En outre, l'entrefer 7 a une largeur d'environ 50 mm. Avec un tel anneau de ferrite 3 et pour une alimentation stabilisée fournissant au fil de bobinage une tension de 14 V et une intensité de 10 A, il règne au centre de l'entrefer 7 un champ magnétique d'environ 160 Gauss.According to one embodiment of the invention, the ferrite ring 3 is made based on nickel and zinc. It has a width of 90 mm, an outside diameter of 280 mm, an inside diameter of 250 mm and, therefore, a thickness of 15 mm. In addition, the air gap 7 has a width of approximately 50 mm. With such a ferrite ring 3 and for a stabilized supply supplying the winding wire with a voltage of 14 V and an intensity of 10 A, a magnetic field of about 160 Gauss prevails in the center of the air gap 7.
Selon l'invention, un cylindre de blindage 2 est positionné entre le pistolet de projection 1 et l'anneau de ferrite 3. De façon plus précise, l'anneau de ferrite 3 est fixé, par sa face intérieure, sur le cylindre de blindage 2. Ce cylindre de blindage 2 est apte, en outre, à supporter le pistolet de projection 1 qui est fixé sur la face intérieure de ce cylindre.According to the invention, a shielding cylinder 2 is positioned between the spray gun 1 and the ferrite ring 3. More precisely, the ferrite ring 3 is fixed, by its inner face, to the shielding cylinder 2. This shielding cylinder 2 is further capable of supporting the spray gun 1 which is fixed on the inner face of this cylinder.
Selon un mode de réalisation de l'invention, ce cylindre de blindage est réalisé en acier doux et a un diamètre extérieur de 210 mm et une longueur de 200 mm. Outre son rôle de support, le cylindre de blindage 2 permet d'éviter que des lignes de champs indésirables ne viennent perturber l'alimentation en peinture, résine ou barbotine du pistolet de projection.According to one embodiment of the invention, this shielding cylinder is made of mild steel and has an outside diameter of 210 mm and a length of 200 mm. In addition to its supporting role, the shielding cylinder 2 makes it possible to prevent undesirable field lines from disturbing the supply of paint, resin or slip to the spray gun.
Selon l'invention, ce cylindre de blindage 2 comporte une ouverture 4 sensiblement alignée avec l'entrefer 7 pour permettre le passage du revêtement depuis le pistolet 1 jusqu'à la surface à recouvrir. On précise que le pistolet se déplace parallèlement par rapport à l'ouverture 4, c'est-à-dire dans le sens suggéré par la double flèche 9. Avantageusement, l'ouverture 4 du cylindre de blindage a une section sensiblement supérieure à celle de l'entrefer 7 de façon à ce que la totalité du revêtement émis par le pistolet 1 puisse être soumise au champ magnétique de l'entrefer 7. Le pistolet de projection 1 est donc centré à l'intérieur du cylindre de blindage 2 puis fixé sur ce cylindre de blindage de manière à être dans l'axe de l'anneau de ferrite 3. De cette façon, la buse du pistolet de projection débouche dans l'entrefer 7. Pour réaliser le recouvrement d'une surface, l'alimentation en courant continu doit tout d'abord être mise en marche de façon à ce qu'un champ magnétique soit créé dans l'entrefer 7 de l'anneau de ferrite 3. La projection automatique du revêtement peut ensuite être effectuée. Les éléments magnétiques contenus dans le revêtement projeté par le pistolet de projection 1 se déposent sur la surface à recouvrir après avoir été orientés à partir du moment de leur passage dans l'entrefer 7, jusqu'au moment de l'application.According to the invention, this shielding cylinder 2 has an opening 4 substantially aligned with the air gap 7 to allow the coating to pass from the gun 1 to the surface to be covered. It is specified that the pistol moves parallel to the opening 4, that is to say in the direction suggested by the double arrow 9. Advantageously, the opening 4 of the shielding cylinder has a section substantially greater than that of the air gap 7 so that the entire coating emitted by the gun 1 can be subjected to the magnetic field of the air gap 7. The projection gun 1 is therefore centered inside the shielding cylinder 2 and then fixed on this shielding cylinder so as to be in the axis of the ferrite ring 3. In this way, the nozzle of the projection gun opens into the air gap 7. To achieve the covering of a surface, the supply in direct current must first be turned on so that a magnetic field is created in the gap 7 of the ferrite ring 3. The automatic projection of the coating can then be performed. Magnetic elements contained in the coating projected by the spray gun 1 are deposited on the surface to be covered after being oriented from the time of their passage in the air gap 7, until the time of application.
Néanmoins, pour une efficacité optimale du champ magnétique, des distances de projection doivent être respectées. Par exemple, pour les modes de réalisation de l'anneau de ferrite 3 et du cylindre de blindage 2 donnés précédemment, la buse du pistolet de projection doit être distante de la surface à recouvrir d'environ 70 à 80 mm, ou encore 20 mm par rapport à la surface extérieure de l'anneau de ferrite 3.However, for optimal efficiency of the magnetic field, projection distances must be respected. For example, for the embodiments of the ferrite ring 3 and of the shielding cylinder 2 given above, the nozzle of the projection gun must be distant from the surface to be covered by approximately 70 to 80 mm, or even 20 mm relative to the outer surface of the ferrite ring 3.
Selon un mode de réalisation préféré de l'invention, le dispositif décrit précédemment est embarqué sur un robot. On a d'ailleurs représenté en traits mixtes sur la figure, une portion d'un bras de robot 6 fixé sur le cylindre de blindage 2. Ce dispositif a donc pour avantage de permettre le recouvrement de tous types de surfaces et, notamment, de surfaces situées en milieu hostile puisqu'il peut être installé sur un bras de robot. According to a preferred embodiment of the invention, the device described above is on board a robot. There is also shown in broken lines in the figure, a portion of a robot arm 6 fixed on the shielding cylinder 2. This device therefore has the advantage of allowing the recovery of all types of surfaces and, in particular, of surfaces located in a hostile environment since it can be installed on a robot arm.

Claims

REVENDICATIONS
1. Dispositif de projection d'un revêtement chargé d'éléments magnétiques, comprenant un pistolet de projection (1) apte à projeter le revêtement sur une surface choisie, caractérisé en ce qu'il comporte des moyens d'orientation (2, 3, 5) des éléments magnétiques du revêtement, ces moyens d'orientation étant fixés autour du pistolet de projection.1. Device for projecting a coating loaded with magnetic elements, comprising a spray gun (1) capable of projecting the coating onto a chosen surface, characterized in that it includes orientation means (2, 3, 5) magnetic elements of the coating, these orientation means being fixed around the spray gun.
2. Dispositif de projection selon la revendication2. Projection device according to claim
1, caractérisé en ce que les moyens d'orientation comprennent un anneau de ferrite (3) entourant le pistolet de projection et autour duquel est enroulé un fil conducteur d'électricité (5) connecté sur une source d'alimentation électrique (8) pour créer à l'intérieur de l'anneau de ferrite un champ magnétique.1, characterized in that the orientation means comprise a ferrite ring (3) surrounding the spray gun and around which is wound an electrically conductive wire (5) connected to an electric power source (8) for create a magnetic field inside the ferrite ring.
3. Dispositif de projection selon la revendication3. Projection device according to claim
2, caractérisé en ce que l'anneau de ferrite comporte un entrefer (7) permettant d'une part, le passage du revêtement lorsque celui-ci est projeté par le pistolet et, d'autre part, l'orientation des éléments magnétiques de ce revêtement projeté.2, characterized in that the ferrite ring comprises an air gap (7) allowing on the one hand, the passage of the coating when it is projected by the gun and, on the other hand, the orientation of the magnetic elements of this projected coating.
4. Dispositif de projection selon la revendication 2 ou 3, caractérisé en ce que les moyens d'orientation comprennent un cylindre de blindage (2) positionné entre le pistolet et l'anneau de ferrite pour protéger ledit pistolet du champ magnétique créé par l'anneau de ferrite. 4. Projection device according to claim 2 or 3, characterized in that the orientation means comprise a shielding cylinder (2) positioned between the gun and the ferrite ring to protect said gun from the magnetic field created by the ferrite ring.
5. Dispositif de projection selon les revendications 3 et 4, caractérisé en ce que le cylindre de blindage comporte une ouverture (4) de section sensiblement supérieure à la section de l'entrefer de l'anneau de ferrite. 5. A projection device according to claims 3 and 4, characterized in that the shielding cylinder has an opening (4) of section substantially greater than the section of the air gap of the ferrite ring.
6. Dispositif de projection selon l'une quelconque des revendications 1 à 5, caractérisé en ce qu'il est embarqué sur un robot (6). 6. A projection device according to any one of claims 1 to 5, characterized in that it is on board a robot (6).
EP95931244A 1994-09-15 1995-09-14 Device for projecting a magnetic element charged coating Expired - Lifetime EP0781170B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9411016A FR2724581B1 (en) 1994-09-15 1994-09-15 DEVICE FOR PROJECTING A COATING LOADED WITH MAGNETIC ELEMENTS
FR9411016 1994-09-15
PCT/FR1995/001180 WO1996008316A1 (en) 1994-09-15 1995-09-14 Device for projecting a magnetic element charged coating

Publications (2)

Publication Number Publication Date
EP0781170A1 true EP0781170A1 (en) 1997-07-02
EP0781170B1 EP0781170B1 (en) 1998-12-09

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP95931244A Expired - Lifetime EP0781170B1 (en) 1994-09-15 1995-09-14 Device for projecting a magnetic element charged coating

Country Status (4)

Country Link
EP (1) EP0781170B1 (en)
DE (1) DE69506568T2 (en)
FR (1) FR2724581B1 (en)
WO (1) WO1996008316A1 (en)

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Publication number Priority date Publication date Assignee Title
DE19635830A1 (en) * 1996-09-04 1998-03-05 Weitmann & Konrad Fa Device and method for dusting web or sheet products

Family Cites Families (2)

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Publication number Priority date Publication date Assignee Title
DE2846623A1 (en) * 1978-10-26 1980-05-08 Basf Ag METHOD FOR THE PRODUCTION OF LAYER MAGNETOGRAM CARRIERS
JPS61122928A (en) * 1984-11-16 1986-06-10 Fujitsu Ltd Production of magnetic disk medium

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9608316A1 *

Also Published As

Publication number Publication date
EP0781170B1 (en) 1998-12-09
DE69506568T2 (en) 1999-06-24
FR2724581A1 (en) 1996-03-22
DE69506568D1 (en) 1999-01-21
FR2724581B1 (en) 1996-12-06
WO1996008316A1 (en) 1996-03-21

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