EP0083258A1 - Electrostatic spraygun deflector for dispersing coating materials, in particular for enamelling - Google Patents

Electrostatic spraygun deflector for dispersing coating materials, in particular for enamelling Download PDF

Info

Publication number
EP0083258A1
EP0083258A1 EP82400737A EP82400737A EP0083258A1 EP 0083258 A1 EP0083258 A1 EP 0083258A1 EP 82400737 A EP82400737 A EP 82400737A EP 82400737 A EP82400737 A EP 82400737A EP 0083258 A1 EP0083258 A1 EP 0083258A1
Authority
EP
European Patent Office
Prior art keywords
gun
deflector
outlet
deflector according
nozzle
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Withdrawn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
EP82400737A
Other languages
German (de)
French (fr)
Inventor
Gérard Guffroy
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.)
De Dietrich et Cie SA
Original Assignee
De Dietrich et Cie SA
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 De Dietrich et Cie SA filed Critical De Dietrich et Cie SA
Publication of EP0083258A1 publication Critical patent/EP0083258A1/en
Withdrawn legal-status Critical Current

Links

Images

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
    • B05B5/08—Plant for applying liquids or other fluent materials to objects
    • B05B5/12—Plant for applying liquids or other fluent materials to objects specially adapted for coating the interior of hollow bodies
    • 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
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns

Definitions

  • the present invention relates to the application of coatings to conductive parts using electrostatic spray guns.
  • the application of powdery coating substances can be carried out by electrifying or ionizing the particles of a product stream using a spray gun in which the product passes in front of electrodes brought to a high potential (from l (order of 100 kV, for example), the part to be coated being subjected to a low potential which is generally that of the mass.
  • the parts pass in front of work stations in which are placed one or more guns which can possibly accompany each part over a certain distance during the application work. This is particularly the case in installations for applying enamels to hollow objects such as mittens, which constitute one of the main parts of domestic stoves and ovens.
  • the gun head has an axial passage at the outlet of which the electrodes are provided and a flared deflector which, by virtue of its shape, gives the cloud of product with a highly directional characteristic, a shape which can resemble that of a corolla .
  • the gun or group of guns deposit on the inner surface of the hollow body (muffle) a layer as uniform as possible. But, since it is a hollow body, this objective is impossible to achieve because the body itself plays the role of a Faraday cage which determines, especially in the vicinity of the walls and the rear face of the room, the influence of electrostatic forces on particles projected by the gun. Another difficulty relates to the deviation due to the current of the propellant fluid which is, in general, pressurized air.
  • the conventional pistol equipped with a flared deflector favors the frontal zones of the walls of the hollow object perpendicular to the axis of the pistol, the extent of the zone covered at a given instant depending on the shape and the dimension of the deflector. .
  • the deposit on surfaces parallel to the axis of the gun will be much less significant.
  • the shape of the cloud of product varies constantly and in particular in the vicinity of the surfaces which extend parallel to the axis of the gun.
  • Figs. 1 and 2 of the appended drawings which schematically show the application of the product to the interior surfaces of a muffle M of a domestic oven
  • the cloud of product leaving the gun P is deflected in the direction of the metal wall closest to the muffle .
  • the gun penetrating therein during the relative movement of the two elements the side wall a 1 is thus coated more or less satisfactorily until the head of the gun and its deflector D reach the angle a 2 of the muffle.
  • the cloud is attracted by the side wall al as well as by the rear wall a3 and there therefore remains an area in the angle a2 where the product can only very easily be deposited.
  • the thickness of the layer provided can vary in a ratio of 1 to 4 between the front face (a4) of the muffle (i.e. the front edge) and the corner areas a2 between the adjoining walls .
  • the object of the invention is to provide a deflector for an electrostatic spray gun with the aid of which a coating layer of substantially uniform thickness can be applied to the interior faces of the walls of a metallic hollow body.
  • a gun deflector intended in particular to coat the internal faces of the walls of metallic hollow bodies
  • a gun endpiece through which a propellant fluid is sent under pressure in which the coating substance is suspended in the form of powder, this nozzle having an outlet surmounted opposite and at a distance from a deflector having at least one flat surface
  • the gun being equipped with electrodes for ionizing or electrifying the particles in suspension in the propellant fluid current, characterized in that said flat surface has at least one radial dimension which is at least equal to the diameter of the outlet opening of the nozzle of the gun.
  • the jet of fluid with the coating substance in suspension by striking the flat surface of the deflector is radially rejected towards the outside and can thus, by its lateral kinetic energy, be deposited on the surfaces to be coated which are arranged parallel to its axis without being influenced to a great extent by electrostatic forces.
  • the gun penetrates inside a hollow body, the powder cloud emerging from the gun changes shape.
  • the trajectories of the particles being less directional, the deflector allows to progressively go through the following three forms: disc, corolla, candle flame.
  • said dimension of the surface of the deflector situated opposite the outlet of the nozzle of the gun is equal to or greater than the diameter of the outlet orifice of this nozzle.
  • the distance between the deflector and the outlet of the gun is adjustable so as to be able to act on the exit speed of the particles, on their trajectory therefore on the shape of the jet.
  • Fig.3 shows the tip 1 of an electrostatic spray gun P which can be of any type currently on the market. This endpiece is traversed by an axial channel 2 in which electrodes can be arranged to electrify a stream of powder which can exit under pressure from the gun.
  • a rod 2 is axially projecting from the end face 3 of the end piece 1.
  • This rod carries a deflector 4 which is constituted by a body of revolution of axis X-X with a curved generator 5 and made of an insulating material. It has two planar radial end faces 6 and 7. In the example shown, the diameter of the deflector decreases from back to front.
  • the diameter D1 of the surface formed by the rear face 7 of the deflector is at least equal to the diameter D 2 of the outlet orifice of the gun. According to the concept guns, the electrodes can be placed in a crown below the deflector or pass through it.
  • Fig.4 shows the effect of the invention on the projection of the enamel in the corners of a muffle M.
  • the cloud of particles spreads radially as soon as the product leaves the gun P and that the corner area a2 is covered with product as are the side wall a1 and the rear wall a3.
  • Fi g .5 shows a deflector 4A of frustoconical shape with its surface 7A whose diameter meets the characteristics of the invention.
  • Fig.6 shows a deflector 4B which has a constant diameter also chosen according to the invention and whose active face 7B therefore has the same diameter.
  • Fig.7 shows a view of the active face 7C of a deflector 4C whose shape is a square.
  • the side D1 of the square is at least equal to the diameter D2 of the gun outlet.
  • Fig.8 shows another 4D surface of a deflector 7D whose general shape is oval.
  • the deflectors 4C and 4D make it possible to obtain non-uniform densities of the cloud projected by the gun by favoring certain zones of the walls to be coated compared to others.
  • a wide variety of shapes can thus be chosen according to needs.

Abstract

The mouth (1) of the gun (P) comprises a deflector (4) which has a radial plane surface (7), at least one dimension (D1) of which is equal at least to the diameter (D2) of the outlet orifice of this mouth (1). Thus, when using the gun to spray a powder product onto a surface to be coated, a cloud of product is formed, the radial dimension of which is such that the coating obtained has a uniform thickness, even in poorly accessible places of a hollow body. Particular application to enamelling, in particular of muffles for domestic cooking ovens. <IMAGE>

Description

La présente invention concerne l'application de revêtements sur des pièces conductrices à l'aide de pistolets de projection électrostatiques.The present invention relates to the application of coatings to conductive parts using electrostatic spray guns.

L'application de substances de revêtement poudreuses peut être réalisée en électrisant ou en ionisant les particules d'un courant de produit à l'aide d'un pistolet de projection dans lequel le produit passe devant des électrodes portées à un potentiel élevé ( de l'ordre de 100 kV, par exemple), la pièce à revêtir étant soumise à un potentiel faible qui est en général celui de la masse.The application of powdery coating substances can be carried out by electrifying or ionizing the particles of a product stream using a spray gun in which the product passes in front of electrodes brought to a high potential (from l (order of 100 kV, for example), the part to be coated being subjected to a low potential which is generally that of the mass.

Dans les installations automatiques assurant l'application des revêtements, les pièces défilent devant des postes de travail dans lesquels sont placés un ou plusieurs pistolets qui peuvent éventuellement accompagner chaque pièce sur une certaine distance au cours du travail d'application. Il en est ainsi notamment dans les installations d'application des émaux sur des objets creux tels que les moufles qui constituent l'une des pièces principales des cuisinières et fours domestiques.In automatic installations ensuring the application of coatings, the parts pass in front of work stations in which are placed one or more guns which can possibly accompany each part over a certain distance during the application work. This is particularly the case in installations for applying enamels to hollow objects such as mittens, which constitute one of the main parts of domestic stoves and ovens.

En général, la tête du pistolet présente un passage axial à la sortie de laquelle sont prévues les électrodes et un déflecteur évasé qui de par sa forme, confère au nuage de produit à caractéristique fortement directionnelle, une forme qui peut rappeler celle d'une corolle.In general, the gun head has an axial passage at the outlet of which the electrodes are provided and a flared deflector which, by virtue of its shape, gives the cloud of product with a highly directional characteristic, a shape which can resemble that of a corolla .

Il est évidemment souhaitable que le pistolet ou le groupe de pistolets déposent sur la surface intérieure du corps creux (moufle) une couche aussi uniforme que possible. Mais, s'agissant d'un corps creux, cet objectif est impossible à atteindre car le corps lui-même joue le rôle d'une cage de Faraday qui détermine, surtout au voisinage des parois et de la face arrière de la pièce, l'influence des forces électrostatiques sur les particules projetées par le pistolet. Une autre difficulté concerne la déviation dûe au courant du fluide propulseur qui est, en général, de l'air sous pression.It is obviously desirable that the gun or group of guns deposit on the inner surface of the hollow body (muffle) a layer as uniform as possible. But, since it is a hollow body, this objective is impossible to achieve because the body itself plays the role of a Faraday cage which determines, especially in the vicinity of the walls and the rear face of the room, the influence of electrostatic forces on particles projected by the gun. Another difficulty relates to the deviation due to the current of the propellant fluid which is, in general, pressurized air.

Le pistolet classique équipé d'un déflecteur évasé, favorise les zones frontales des parois de l'objet creux perpendicualires à l'axe du pistolet, l'étendue de la zone couverte à un instant donné dépendant de la forme et de la dimension du déflecteur. Par contre, le dépôt sur des surfaces parallèles à l'axe du pistolet sera nettement moins important.The conventional pistol equipped with a flared deflector, favors the frontal zones of the walls of the hollow object perpendicular to the axis of the pistol, the extent of the zone covered at a given instant depending on the shape and the dimension of the deflector. . On the other hand, the deposit on surfaces parallel to the axis of the gun will be much less significant.

Au cours de l'application du revêtement, sur les surfaces intérieures du corps creux, la forme du nuage de produit varie constamment et notamment au voisinage des surfaces qui s'étendent parallèlement à l'axe du pistolet.During the application of the coating, on the interior surfaces of the hollow body, the shape of the cloud of product varies constantly and in particular in the vicinity of the surfaces which extend parallel to the axis of the gun.

Par exemple, comme représenté sur les Fig. 1 et 2 des dessins annexés, qui montrent schématiquement l'application du produit sur les surfaces intérieures d'un moufle M de four domestique, le nuage de produit sortant du pistolet P est dévié en direction de la paroi métallique a la plus proche du moufle. Le pistolet pénétrant dans celui-ci au cours du mouvement relatif des deux éléments, la paroi latérale al est ainsi revêtue de façon à peu près satisfaisante jusqu'à ce que la tête du pistolet et son déflecteur D atteignent l'angle a2 du moufle. En effet, près de la paroi arrière a3, le nuage est attiré aussi bien par la paroi latérale al que par la paroi arrière a3 et il subsiste donc une zone dans l'angle a2 où le produit ne peut que très difficilement se déposer. En réalité, l'épaisseur de la couche apportée peut varier dans un rapport de 1 à 4 entre la face avant (a4) dumoufle (c'est-à-dire le rebord frontal) et les zones d'angle a2 entre les parois jointives.For example, as shown in Figs. 1 and 2 of the appended drawings, which schematically show the application of the product to the interior surfaces of a muffle M of a domestic oven, the cloud of product leaving the gun P is deflected in the direction of the metal wall closest to the muffle . The gun penetrating therein during the relative movement of the two elements, the side wall a 1 is thus coated more or less satisfactorily until the head of the gun and its deflector D reach the angle a 2 of the muffle. Indeed, near the rear wall a3, the cloud is attracted by the side wall al as well as by the rear wall a3 and there therefore remains an area in the angle a2 where the product can only very easily be deposited. In reality, the thickness of the layer provided can vary in a ratio of 1 to 4 between the front face (a4) of the muffle (i.e. the front edge) and the corner areas a2 between the adjoining walls .

L'invention a pour but de fournir un déflecteur pour un pistolet de projection électrostatique à l'aide duquel on puisse appliquer une couche de revêtement d'une épaisseur pratiquement uniforme sur les faces intérieures des parois d'un corps creux métallique.The object of the invention is to provide a deflector for an electrostatic spray gun with the aid of which a coating layer of substantially uniform thickness can be applied to the interior faces of the walls of a metallic hollow body.

Elle a donc pour objet un tel déflecteur pour pistolet destiné notamment à revêtir les faces intérieures des parois de corps creux métalliquescomportant un embout de pistolet à travers lequel est envoyé un fluide propulseur sous pression dans lequel la substance de revêtement est suspendue sous forme de poudre, cet embout présentant une sortie surmontée en regard et à distance d'un déflecteur présentant au moins une surface plane, le pistolet étant équipé d'électrodes pour ioniser ou électriser les particules en suspension dans le courant fluide propulseur, caractérisé en ce que ladite surface plane présente au moins une dimension radiale qui est au moins égale au diamètre de l'orifice de sortie de l'embout du pistolet.Its subject is therefore such a gun deflector intended in particular to coat the internal faces of the walls of metallic hollow bodies comprising a gun endpiece through which a propellant fluid is sent under pressure in which the coating substance is suspended in the form of powder, this nozzle having an outlet surmounted opposite and at a distance from a deflector having at least one flat surface, the gun being equipped with electrodes for ionizing or electrifying the particles in suspension in the propellant fluid current, characterized in that said flat surface has at least one radial dimension which is at least equal to the diameter of the outlet opening of the nozzle of the gun.

Il résulte de cette caractéristique que le jet de fluide avec la substance de revêtement en suspension, en frappant la surface plane du déflecteur est radialement rejeté vers l'extérieur et peut ainsi, de par son énergie cinétique latérale, se déposer sur les surfaces à revêtir qui sont disposées parallèlement à son axe sans être influencées dans une trop grande mesure par les forces électrostatiques. Au fur et à mesure de la pénétration du pistolet à l'intérieur d'un corps creux, le nuage de poudre sortant du pistolet change de forme. Les trajectoires des particules étant moins directionnelles, le déflecteur permet de passer progressivement par les trois formes suivantes : disque , corolle, flamme de bougie.It results from this characteristic that the jet of fluid with the coating substance in suspension, by striking the flat surface of the deflector is radially rejected towards the outside and can thus, by its lateral kinetic energy, be deposited on the surfaces to be coated which are arranged parallel to its axis without being influenced to a great extent by electrostatic forces. As the gun penetrates inside a hollow body, the powder cloud emerging from the gun changes shape. The trajectories of the particles being less directional, the deflector allows to progressively go through the following three forms: disc, corolla, candle flame.

Suivant une caractéristique particulière de l'invention, ladite dimension de la surface du déflecteur située en regard de la sortie de l'embout du pistolet est égale ou supérieure au diamètre de l'orifice de sortie de cet embout.According to a particular characteristic of the invention, said dimension of the surface of the deflector situated opposite the outlet of the nozzle of the gun is equal to or greater than the diameter of the outlet orifice of this nozzle.

Par ailleurs, la distance entre le déflecteur et l'orifice de sortie du pistolet est réglable de façon à pouvoir agir sur la vitesse de sortie des particules, sur leur trajectoire donc sur la forme du jet.Furthermore, the distance between the deflector and the outlet of the gun is adjustable so as to be able to act on the exit speed of the particles, on their trajectory therefore on the shape of the jet.

L'invention est exposée ci-après plus en détail à l'aide de dessins représentant seulement des modes d'éxé- cution.

  • - les Fig.l et 2 montrent des vues schématiques en élévation d'un moufle de four domestique de cuisson, suspendu ( avec son ouverture vers le bas) à une chaîne de transfert d'une installation d'émaillage, pour deux positions différentes d'un pistolet d'application de l'émail, ce pistolet étant équipé d'un déflecteur de conception classique;
  • - la Fig.3 est une vue en coupe axiale et à grande échelle de l'embout de la tête d'un pistolet équipé d'un déflecteur suivant l'invention;
  • - la Fig.4 est une vue analogue à celles des Fig.l et 2 montrant l'effet de l'invention sur l'application de l'émail dans l'un des angles d'un moufle de four domestique;
  • - les Fig.5 à 8 montrent d'autres formes de déflecteurs possibles.
The invention is set out below in more detail with the aid of drawings showing only embodiments.
  • - Fig.l and 2 show schematic elevation views of a domestic oven muffle, suspended (with its opening downwards) from a transfer chain of an enamelling installation, for two different positions d 'an enamel application gun, this gun being equipped with a deflector of conventional design;
  • - Fig.3 is an axial sectional view on a large scale of the tip of the head of a gun equipped with a deflector according to the invention;
  • - Fig.4 is a view similar to those of Fig.l and 2 showing the effect of the invention on the application of enamel in one of the angles of a domestic oven muffle;
  • - Figs. 5 to 8 show other forms of possible deflectors.

La Fig.3 représente l'embout 1 d'un pistolet P de projection électrostatique qui peut être de tout type actuellement sur le marché. Cet embout est traversé par un canal axial 2 dans lequel peuvent être disposées des électrodes pour électriser un courant de poudre qui peut sortir sous pression du pistolet.Fig.3 shows the tip 1 of an electrostatic spray gun P which can be of any type currently on the market. This endpiece is traversed by an axial channel 2 in which electrodes can be arranged to electrify a stream of powder which can exit under pressure from the gun.

Une tige 2 est en saillie axiale de la face d'extrémité 3 de l'embout 1. Cette tige porte un déflecteur 4 qui est constitué par un corps de révolution d'axe X-X à génératrice courbe 5 et réalisé en une matière isolante. Il présente deux faces d'extrémité radiales planes 6 et 7. Dans l'exemple représenté, le diamètre du déflecteur diminue d'arrière en avant.A rod 2 is axially projecting from the end face 3 of the end piece 1. This rod carries a deflector 4 which is constituted by a body of revolution of axis X-X with a curved generator 5 and made of an insulating material. It has two planar radial end faces 6 and 7. In the example shown, the diameter of the deflector decreases from back to front.

Le diamètre D1 de la surface formée par la face arrière 7 du déflecteur est au moins égal au diamètre D2 de l'orifice de sortie du pistolet. Suivant les conceptions des pistolets, les électrodes peuvent être placées en couronne en-dessous du déflecteur ou le traverser.The diameter D1 of the surface formed by the rear face 7 of the deflector is at least equal to the diameter D 2 of the outlet orifice of the gun. According to the concept guns, the electrodes can be placed in a crown below the deflector or pass through it.

La Fig.4 montre l'effet de l'invention sur la projection de l'émail dans les angles d'un moufle M. On voit que le nuage de particules s'étale radialement dès la sortie du produit du pistolet P et que la zone d'angle a2 est couverte de produit tout comme le sont la paroi latérale al et la paroi arrière a3.Fig.4 shows the effect of the invention on the projection of the enamel in the corners of a muffle M. We see that the cloud of particles spreads radially as soon as the product leaves the gun P and that the corner area a2 is covered with product as are the side wall a1 and the rear wall a3.

Ainsi, grâce à l'invention, on a pu réaliser des revêtements d'émail à l'intérieur des moufles, dont les écarts d'épaisseur sur l'ensemble de la surface revêtue ne dépassent pas 30 microns.Thus, thanks to the invention, it has been possible to produce enamel coatings inside the mittens, the thickness differences of which over the entire coated surface do not exceed 30 microns.

La Fig.5 montre un déflecteur 4A de forme tronconique avec sa surface 7A dont le diamètre satisfait aux caractéristiques de l'invention.Fi g .5 shows a deflector 4A of frustoconical shape with its surface 7A whose diameter meets the characteristics of the invention.

La Fig.6 montre un déflecteur 4B qui a un diamètre constant également choisi conforme à l'invention et dont la face active 7B présente donc le même diamètre.Fig.6 shows a deflector 4B which has a constant diameter also chosen according to the invention and whose active face 7B therefore has the same diameter.

La Fig.7 montre une vue de la face active 7C d'un déflecteur 4C dont la forme est un carré. Dans ce cas, le côté D1 du carré est au moins égal au diamètre D2 de l'orifice de sortie du pistolet. La Fig.8 montre une autre surface 4D d'un déflecteur 7D dont la forme générale est ovale.Fig.7 shows a view of the active face 7C of a deflector 4C whose shape is a square. In this case, the side D1 of the square is at least equal to the diameter D2 of the gun outlet. Fig.8 shows another 4D surface of a deflector 7D whose general shape is oval.

Les déflecteurs 4C et 4D permettent d'obtenir des densités non uniformes du nuage projeté par le pistolet en favorisant certaines zones des parois à revêtir par rapport.à d'autres. Une grande variété de formes peut ainsi être choisie en fonction des besoins.The deflectors 4C and 4D make it possible to obtain non-uniform densities of the cloud projected by the gun by favoring certain zones of the walls to be coated compared to others. A wide variety of shapes can thus be chosen according to needs.

Claims (9)

1. Déflecteur pour pistolet destiné notamment à revêtir les faces intérieures des parois de corps creux métalliques(M), comportant un embout de pistolet (1) à travers lequel est envoyé un fluide propulseur sous pres-. sion dans lequel la substance de revêtement est suspendue sous forme de poudre, cet embout présentant une sortie surmontée en regard et à distance d'un déflecteur (4,4A, à 4D) présentant au moins une surface plane (7,7A à 7D), le pistolet étant équipé d'électrodes pour ioniser ou électriser les particules en suspension dans le courant de fluide propulseur, caractérisé en ce que ladite surface plane (7,7A à 7D) présente au moins une dimension radiale (Dl) qui est au moins égale au diamètre (D2) de l'orifice de sortie de l'embout (1) du pistolet (P).1. Deflector for a pistol intended in particular for coating the internal faces of the walls of metallic hollow bodies (M), comprising a pistol tip (1) through which a propellant fluid is sent under pressure. sion in which the coating substance is suspended in powder form, this nozzle having an outlet surmounted opposite and at a distance from a deflector (4,4A, to 4D) having at least one flat surface (7,7A to 7D) , the gun being equipped with electrodes for ionizing or electrifying the particles in suspension in the propellant flow, characterized in that said planar surface (7,7A to 7D) has at least one radial dimension (Dl) which is at least equal to the diameter (D2) of the outlet orifice of the nozzle (1) of the gun (P). 2. Déflecteur suivant la revendication 1, carac= térisé en ce que ladite dimension (D'l) de la surface (7, 7A à 7D) située en regard de la sortie de l'embout du pistolet (P) est supérieure au diamètre (D2) de l'orifice de sortie (3) de cet embout (1).2. Deflector according to claim 1, charac = terized in that said dimension (D'l) of the surface (7, 7A to 7D) located opposite the outlet of the nozzle of the gun (P) is greater than the diameter (D2) of the outlet orifice (3) of this nozzle (1). 3. Déflecteur suivant l'une quelconque des revendications 1 et 2, caractérisé en ce qu'il présente une symétrie de révolution, ladite dimension (Dl) étant le diamètre de la surface d'extrémité (7,7A à 7D) du déflecteur (4,4A,4B).3. Deflector according to any one of claims 1 and 2, characterized in that it has a symmetry of revolution, said dimension (Dl) being the diameter of the end surface (7,7A to 7D) of the deflector ( 4.4A, 4B). 4. Déflecteur suivant la revendication 3., caractérisé en ce qu'il présente un corps de révolution à génératrice courbe (5) et se rétrécit à partir de sa surface d'extrémité (7) proche de l'orifice de sortie du pistolet (P).4. Deflector according to claim 3., characterized in that it has a body of revolution with curved generator (5) and narrows from its end surface (7) close to the outlet of the gun ( P). 5. Déflecteur suivant la revendication 3, caractérisé en ce qu'il présente une forme tronconique tournant sa plus grande face radiale (7A) vers l'orifice de sortie du pistolet (P).5. Deflector according to claim 3, characterized in that it has a frustoconical shape rotating its largest radial face (7A) towards the outlet of the gun (P). 6. Déflecteur suivant la revendication 3, caractérisé en ce qu'il est de diamètre constant sur toute sa hauteur.6. Deflector according to claim 3, characterized in that it is of constant diameter over its entire height. 7. Déflecteur suivant l'une quelconque des revendications 1 et 2, caractérisé en ce qu'il présente une forme irrégulière par rapport à l'axe (X-X) de l'embout (1) du pistolet..7. Deflector according to any one of claims 1 and 2, characterized in that it has an irregular shape relative to the axis (X-X) of the nozzle (1) of the gun. 8. Déflecteur suivant la revendication 7, caractérisé en ce que sa surface (7C) en regard dudit orifice de sortie est de forme carrée.8. Deflector according to claim 7, characterized in that its surface (7C) opposite said outlet orifice is of square shape. 9. Déflecteur suivant la revendication 7, caractérisé en ce que sa surface (7D) en regard dudit orifice de sortie est de forme ovale.9. Deflector according to claim 7, characterized in that its surface (7D) opposite said outlet orifice is of oval shape.
EP82400737A 1981-12-30 1982-04-26 Electrostatic spraygun deflector for dispersing coating materials, in particular for enamelling Withdrawn EP0083258A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8124501 1981-12-30
FR8124501A FR2518902A1 (en) 1981-12-30 1981-12-30 DEFLECTOR FOR ELECTROSTATIC APPLICATION GUN OF COATING PRODUCTS, IN PARTICULAR FOR ENAMELLING

Publications (1)

Publication Number Publication Date
EP0083258A1 true EP0083258A1 (en) 1983-07-06

Family

ID=9265524

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82400737A Withdrawn EP0083258A1 (en) 1981-12-30 1982-04-26 Electrostatic spraygun deflector for dispersing coating materials, in particular for enamelling

Country Status (2)

Country Link
EP (1) EP0083258A1 (en)
FR (1) FR2518902A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1361917A (en) * 1963-02-19 1964-05-29 Sames Mach Electrostat Improvements to electrostatic enamelling of bathtubs or other hollow bodies
US3521815A (en) * 1969-05-07 1970-07-28 Imre Szasz Guns for the electrostatic spray coating of objects with a powder
US3667675A (en) * 1971-02-16 1972-06-06 Graco Inc Electrostatic powder coating apparatus
FR2381833A1 (en) * 1977-02-23 1978-09-22 Air Ind Enamelling hollow objects, e.g. baths - by electrostatic powder application using robot followers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1361917A (en) * 1963-02-19 1964-05-29 Sames Mach Electrostat Improvements to electrostatic enamelling of bathtubs or other hollow bodies
US3521815A (en) * 1969-05-07 1970-07-28 Imre Szasz Guns for the electrostatic spray coating of objects with a powder
US3667675A (en) * 1971-02-16 1972-06-06 Graco Inc Electrostatic powder coating apparatus
FR2381833A1 (en) * 1977-02-23 1978-09-22 Air Ind Enamelling hollow objects, e.g. baths - by electrostatic powder application using robot followers

Also Published As

Publication number Publication date
FR2518902A1 (en) 1983-07-01

Similar Documents

Publication Publication Date Title
JP2609659B2 (en) Electrostatic sprayer for powder
US5344078A (en) Nozzle assembly for HVLP spray gun
US7017835B2 (en) Rotary atomizer for particulate paints
RU2448780C2 (en) Annular air atomiser and method of coat application by spraying
CA2665181C (en) Rotary electrostatic atomizer
KR101477635B1 (en) spray device having a parabolic flow surface
EP2279797B1 (en) Nozzle with internal filter
JPH0510144B2 (en)
US10016770B2 (en) Rotary atomizing electrostatic applicator and shaping air ring for the same
US5368237A (en) Power coating guns with improved spray nozzles and improved method of power coating
WO1982001831A1 (en) Tornado generating nozzle and apparatus
US3887135A (en) Gas-atomizing nozzle by spirally rotating gas stream
GB2038209A (en) Atomising process for spraying powdered material
US5686149A (en) Spray device and method for powder coating material
EP0083258A1 (en) Electrostatic spraygun deflector for dispersing coating materials, in particular for enamelling
US6676049B2 (en) Bell cup powder spray applicator
JP2007203257A (en) Spray pattern adjustable mechanism and spray pattern adjustable method of bell-type painting apparatus
US1625635A (en) Fuel burner
GB1587952A (en) Electrostatic spraying device
JP3589022B2 (en) Metallic paint application method
EP0630690B1 (en) Air assisted flat jet spraying device for spraying coating material
FR2481782A1 (en) LIQUID SPRAY NOZZLE, PARTICULARLY FOR SPRAYING LIQUID EFFLUENTS TO BE BURNED
JP3562361B2 (en) Rotary atomizing coating equipment
US8333334B1 (en) Electro-spray coating head applicator
JPH0433958Y2 (en)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

AK Designated contracting states

Designated state(s): BE CH DE GB IT LI LU NL SE

18W Application withdrawn

Withdrawal date: 19830629

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19920930

Year of fee payment: 11

RIN1 Information on inventor provided before grant (corrected)

Inventor name: GUFFROY, GERARD