EP0380386B1 - Spray coating method and spray coating installation - Google Patents

Spray coating method and spray coating installation Download PDF

Info

Publication number
EP0380386B1
EP0380386B1 EP90400119A EP90400119A EP0380386B1 EP 0380386 B1 EP0380386 B1 EP 0380386B1 EP 90400119 A EP90400119 A EP 90400119A EP 90400119 A EP90400119 A EP 90400119A EP 0380386 B1 EP0380386 B1 EP 0380386B1
Authority
EP
European Patent Office
Prior art keywords
sputtering
components
head
trajectory
conveyor
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
EP90400119A
Other languages
German (de)
French (fr)
Other versions
EP0380386A2 (en
EP0380386A3 (en
Inventor
Barry Arden Calhoon
Bernard Marchand
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.)
GRACO FRANCE
Original Assignee
GRACO FRANCE
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 GRACO FRANCE filed Critical GRACO FRANCE
Priority to AT90400119T priority Critical patent/ATE98914T1/en
Publication of EP0380386A2 publication Critical patent/EP0380386A2/en
Publication of EP0380386A3 publication Critical patent/EP0380386A3/en
Application granted granted Critical
Publication of EP0380386B1 publication Critical patent/EP0380386B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/0221—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts
    • B05B13/0264—Overhead conveying means, i.e. the object or other work being suspended from the conveying means; Details thereof, e.g. hanging hooks

Definitions

  • the present invention relates to improvements made to spray coating installations.
  • Coating installations and more particularly electrostatic coating installations are currently used comprising spraying devices which are generally in the form of a circular disc or bowl ensuring the distribution of the coating material brought to its surface, the part to be provided with the coating moving along a determined path, generally in the form of an arc of a circle around the spray head and in the plane of rotation of the latter.
  • the objects to be provided with the coating in particular by electrostatic spraying using a spray head, move in the installation by being transported by a conveyor, so that they can be brought successively in front of the spray head.
  • a spray head moves in the installation by being transported by a conveyor, so that they can be brought successively in front of the spray head.
  • two spray heads are used and the object to be coated is brought successively in front of each of these spray heads, by means of a conveyor which has a trajectory with double inverted loops, which makes it possible to process the two successively opposite sides of the room.
  • Fr-A-2 261 146 describes a coating system by electrostatic spraying using a spraying means ensuring the projection and the distribution of the coating material and in front of which move the parts to be treated which are transported by a conveyor system along a route such that a single spraying means can alternately treat the two opposite faces of a part, said route comprising: a first part bringing the first face of the pieces facing the spraying means, on one sides of this plea; a second part bringing the moving parts to, a third part ensuring the presentation of the parts by spraying, the latter then effecting the deposition of the coating material on the second face of said part.
  • the parts to be treated do not undergo any rotation on themselves, but the path is partly vertical, which increases the size of the installation.
  • the present invention proposes to provide a method and a device which do not have the drawbacks of the solutions according to the prior art mentioned above, and which allow a reduction in the overall height in the form of such a device.
  • the invention relates to an electrostatic spray coating process which, starting from the state of the art defined by Fr-A-2 261 146 is characterized in that the path of the parts to be treated is horizontal and in that said parts undergo a rotation of 360 ° during the second part of said course.
  • the invention relates to a device for implementing the method according to claim 1 comprising an enclosure or cabin in which the spraying is carried out, a spray head positioned in said enclosure, a conveyor or conveyor, on which the parts to be treated are suspended, this conveyor, the configuration of which is such that the spray head processes the first face of the part on said first part of the trajectory then the second face of said part on said third part of the trajectory, characterized in that said conveyor is horizontal and its configuration comprises a second part of the trajectory which comprises: a first and a second curve each of 90 °, oriented in the same direction, followed by a substantially rectilinear portion and parallel to said first part, this portion being located outside the spraying installation and, a third and a fourth me curves each of 90 °, orientated in the same sense and outside the sputtering installation.
  • the two parts of the trajectory of the conveyor system in the spray coating zone may be straight or have a slight curvature, opposite the spraying means, this curvature being centered on this way.
  • the presentation of the parts in front of the spraying means can be carried out either continuously or by timed stopping of these parts, that is to say according to a step-by-step movement.
  • an installation according to the present invention is in the form of an enclosure 10 or cabin, inside which the parts are coated by spraying.
  • an electrostatic spraying system is used, which comprises a head of the disc or circular bowl type, ensuring the distribution of the coating material.
  • This spray head 12 is of a well known type and therefore it will not be described here.
  • the spray head is mounted at the end of a support barrel 14 which can move axially by means of a conventional endless chain device 16 so as to print on the head 12 an alternative vertical sweeping movement with adjustable stroke as a function of the height of the parts to be treated.
  • a support barrel 14 which can move axially by means of a conventional endless chain device 16 so as to print on the head 12 an alternative vertical sweeping movement with adjustable stroke as a function of the height of the parts to be treated.
  • a support barrel 14 can move axially by means of a conventional endless chain device 16 so as to print on the head 12 an alternative vertical sweeping movement with adjustable stroke as a function of the height of the parts to be treated.
  • the parts to be treated such as 18 are suspended using hooks 20, on a conveyor or conveyor 22 which ensures their travel past the spray head 12 which coats them.
  • the invention proposes to treat all the faces of the parts to be treated 18 using a single spray head 12.
  • the path followed by the parts that is to say the configuration of the conveyor or conveyor 20 has an original shape.
  • the part of the trajectory called a detour which is constituted by the curves 26, 28, 32, 34 as well as by the part 30 which makes the parts undergo a rotation of 360 ° can have any any shape and length.
  • the conveyor system comprises a part of the feed path 38 located outside of the spray enclosure 10, which can be of any shape, and which extends along the first rectilinear part 24.
  • the conveying system comprises a part of the evacuation trajectory 40 which can also be of any shape and which extends the straight path portion 36 located in the processing enclosure 10.
  • the improved system according to the present invention it is not necessary to use special hooks for hanging the parts and these can be hung on the mobile carriages of the conveyor systems, by means of '' one or more attachment points depending on the dimensions of the parts, which makes it possible to coat the two sides of the same part using a single spraying means, without turning the part on its attachment and suspension system.
  • the device according to the invention saves space compared to the previous solutions mentioned above since the trajectory of the system for conveying the pieces inside and outside the enclosure spray to ensure the treatment of all the faces of these parts is particularly compact as clearly shown in Figure 2.
  • system which is the subject of the invention can be applied to any spraying installation comprising a single spraying means, for example a single head, since it is sufficient to modify the conveyor system which ensures the movement of the parts inside the processing enclosure.
  • the present invention is not limited to the various embodiments described above but that it encompasses all variants thereof as described in the claims.
  • the two parts 24 36 of the trajectory of the conveyor system inside the spray coating zone can have different shapes and lengths opposite the spray head without any particular geometric definition.
  • the spraying head or means can be fixed without undergoing any sweeping movement and the spraying face of the disc or bowl, when using an electrostatic spraying head, can be located either in a horizontal plane or in a plane inclined to the horizontal.
  • an electrostatic spray head has been given as an example of application. This is only an example, other means can be used for spraying and spraying the coating product, for example a spray gun by compressed air or by high pressure with or without additional spraying by electrostatic field.

Landscapes

  • Application Of Or Painting With Fluid Materials (AREA)
  • Spray Control Apparatus (AREA)
  • Coating By Spraying Or Casting (AREA)

Abstract

The installation comprises a first part (24) which brings the first side of the pieces (12) opposite the spray means (12) against one of the sides of this means, a second part (26, 28, 30, 32, 34) along which the moving pieces are rotated through 360 DEG , and a third part (36) which presents the pieces to the spray means (12): the latter then deposits the coating material on the second side of the piece. <IMAGE>

Description

La présente invention a pour objet des perfectionnements apportés aux installations de revêtement par pulvérisation.The present invention relates to improvements made to spray coating installations.

On utilise à l'heure actuelle des installations de revêtement et plus particulièrement des installations de revêtement par procédé électrostatique comportant des dispositifs de pulvérisation qui se présentent généralement sous la forme d'un disque circulaire ou bol assurant la distribution de la matière de revêtement amenée à sa surface, la pièce devant être pourvue du revêtement se déplaçant suivant une trajectoire déterminée, généralement en forme d'arc de cercle autour de la tête de pulvérisation et dans le plan de rotation de cette dernière.Coating installations and more particularly electrostatic coating installations are currently used comprising spraying devices which are generally in the form of a circular disc or bowl ensuring the distribution of the coating material brought to its surface, the part to be provided with the coating moving along a determined path, generally in the form of an arc of a circle around the spray head and in the plane of rotation of the latter.

La mise en oeuvre de ces systèmes de pulvérisation présente un certain nombre de difficultés notamment lorsque l'on veut réaliser une pulvérisation sur toutes les faces de l'objet à revêtir.The implementation of these spraying systems presents a certain number of difficulties, in particular when it is desired to spray on all the faces of the object to be coated.

Généralement, dans de telles installations, les objets devant être munis du revêtement notamment par pulvérisation électro-statique à l'aide d'une tête de pulvérisation, se déplacent dans l'installation en étant transportés par un convoyeur, de façon à pouvoir être amenés successivement devant la tête de pulvérisation. Pour assurer une pulvérisation sur toute la surface de la pièce et en particulier sur les deux faces opposées de celle-ci quand elle se présente sous la forme d'un panneau plan, il est nécessaire de prévoir des trajectoires de convoyage plus ou moins compliquées.Generally, in such installations, the objects to be provided with the coating, in particular by electrostatic spraying using a spray head, move in the installation by being transported by a conveyor, so that they can be brought successively in front of the spray head. To ensure spraying over the entire surface of the part and in particular on the two opposite faces of the latter when it is in the form of a flat panel, it is necessary to provide more or less complicated conveying paths.

On a ainsi envisagé d'utiliser une trajectoire en forme de boucle, amenant successivement les deux faces de l'objet à revêtir devant une tête de pulvérisation unique. Cependant, dans ce cas, il faut prévoir un retournement de la pièce de manière à obtenir ce revêtement sur les deux faces, ce qui oblige à concevoir des systèmes de crochets rotatifs sur l'installation de convoyage.It has thus been envisaged to use a loop-shaped trajectory, successively bringing the two faces of the object to be coated in front of a single spray head. However, in this case, it is necessary to provide for a reversal of the part so as to obtain this coating on the two sides, which requires the design of rotating hook systems on the conveyor system.

Dans d'autres installations, on utilise deux têtes de pulvérisation et l'objet à revêtir est amené successivement devant chacune de ces têtes de pulvérisation, grâce à un transporteur qui présente une trajectoire à double boucles inversées, ce qui permet de traiter successivement les deux faces opposées de la pièce.In other installations, two spray heads are used and the object to be coated is brought successively in front of each of these spray heads, by means of a conveyor which has a trajectory with double inverted loops, which makes it possible to process the two successively opposite sides of the room.

Fr-A-2 261 146 décrit un système de revêtement par pulvérisation électrostatique à l'aide d'un moyen de pulvérisation assurant la projection et la distribution de la matière de revêtement et devant lequel se déplacent les pièces à traiter qui sont transportés par un système de convoyage selon un parcours tel qu'un moyen de pulvérisation unique puisse traiter alternativement les deux faces opposées d'une pièce, ledit parcours comportant : une première partie amenant la première face des pièces en regard du moyen de pulvérisation, sur l'un des côtés de ce moyen ; une seconde partie amenant les pièces en déplacement à, une troisième partie assurant la présentation des pièces au moyen de pulvérisation , ce dernier effectuant alors le dépôt de la matière de revêtement sur la seconde face de ladite pièce. Dans ce système les pièces à traiter ne subissent aucune rotation sur elles-même mais le parcours est en partie vertical, ce qui augmente l'encombrement de l'installation.Fr-A-2 261 146 describes a coating system by electrostatic spraying using a spraying means ensuring the projection and the distribution of the coating material and in front of which move the parts to be treated which are transported by a conveyor system along a route such that a single spraying means can alternately treat the two opposite faces of a part, said route comprising: a first part bringing the first face of the pieces facing the spraying means, on one sides of this plea; a second part bringing the moving parts to, a third part ensuring the presentation of the parts by spraying, the latter then effecting the deposition of the coating material on the second face of said part. In this system, the parts to be treated do not undergo any rotation on themselves, but the path is partly vertical, which increases the size of the installation.

Les installations connues sont donc peu pratiques, coûteuses, entraînent un gaspillage d'espace et elles sont difficilement utilisables pour traiter des pièces de grandes dimensions devant être suspendues en au moins deux points sur les crochets des installations de convoyage.The known installations are therefore impractical, costly, cause a waste of space and they are difficult to use for treating large parts which have to be suspended at at least two points on the hooks of the conveying installations.

En conséquence la présente invention se propose d'apporter un procédé et un dispositif ne présentant pas les inconvénients des solutions selon la technique antérieure rappelée ci-dessus, et permettant une réduction de l'encombrement en hauteur d'un tel dispositif.Consequently, the present invention proposes to provide a method and a device which do not have the drawbacks of the solutions according to the prior art mentioned above, and which allow a reduction in the overall height in the form of such a device.

En premier lieu, l'invention concerne un procédé de revêtement par pulvérisation électro-statique qui, partant de l'état de la technique définie par Fr-A-2 261 146 est caractérisé en ce que le parcours des pièces à traiter est horizontal et en ce que lesdites pièces subissent une rotation de 360° lors de la seconde partie dudit parcours.Firstly, the invention relates to an electrostatic spray coating process which, starting from the state of the art defined by Fr-A-2 261 146 is characterized in that the path of the parts to be treated is horizontal and in that said parts undergo a rotation of 360 ° during the second part of said course.

En second lieu, l'invention concerne un dispositif pour la mise en oeuvre du procédé selon la revendication 1 comportant une enceinte ou cabine dans laquelle s'effectue la pulvérisation, une tête de pulvérisation positionnée dans ladite enceinte, un transporteur ou convoyeur , sur lequel les pièces à traiter sont suspendues, ce transporteur dont la configuration est telle que la tête de pulvérisation traite la première face de la pièce sur ladite première partie de trajectoire puis la seconde face de ladite pièce sur ladite troisième partie de trajectoire, caractérisé en ce que ledit convoyeur est horizontal et sa configuration comporte une seconde partie de trajectoire qui comprend :- une première et une seconde courbes chacune de 90°, orientées dans le même sens, suivies d'une portion sensiblement rectiligne et parallèle à ladite première partie , cette portion étant située à l'extérieur de l'installation de pulvérisation et, une troisième et une quatrième courbes chacune de 90°, orientées dans le même sens, et à l'extérieur de l'installation de pulvérisation.Secondly, the invention relates to a device for implementing the method according to claim 1 comprising an enclosure or cabin in which the spraying is carried out, a spray head positioned in said enclosure, a conveyor or conveyor, on which the parts to be treated are suspended, this conveyor, the configuration of which is such that the spray head processes the first face of the part on said first part of the trajectory then the second face of said part on said third part of the trajectory, characterized in that said conveyor is horizontal and its configuration comprises a second part of the trajectory which comprises: a first and a second curve each of 90 °, oriented in the same direction, followed by a substantially rectilinear portion and parallel to said first part, this portion being located outside the spraying installation and, a third and a fourth me curves each of 90 °, orientated in the same sense and outside the sputtering installation.

Selon un mode de réalisation préféré de la présente invention, les deux parties de la trajectoire du système de convoyage dans la zone de revêtement par pulvérisation peuvent être rectilignes ou présenter une légère courbure, en regard du moyen de pulvérisation, cette courbure étant centrée sur ce moyen.According to a preferred embodiment of the present invention, the two parts of the trajectory of the conveyor system in the spray coating zone may be straight or have a slight curvature, opposite the spraying means, this curvature being centered on this way.

Selon l'invention la présentation des pièces devant le moyen de pulvérisation peut s'effectuer soit en continue soit par arrêt cadencé de ces pièces c'est à dire selon un déplacement pas à pas.According to the invention, the presentation of the parts in front of the spraying means can be carried out either continuously or by timed stopping of these parts, that is to say according to a step-by-step movement.

D'autres caractéristiques et avantages de la présente invention ressortiront de la description faite ci-après en référence aux dessins annexés qui en illustrent un mode de réalisation donné à titre d'exemple, dépourvu de tout caractère limitatif. Sur les dessins :

  • La figure 1 représente une installation de revêtement électrostatique selon l'invention, en coupe axiale verticale et
  • La figure 2 est une vue en plan et coupe horizontale de la figure 1 sur laquelle on a représenté la trajectoire des pièces à traiter par l'installation selon l'invention.
Other characteristics and advantages of the present invention will emerge from the description given below with reference to the accompanying drawings which illustrate an embodiment given by way of example, devoid of any limiting character. In the drawings:
  • FIG. 1 represents an electrostatic coating installation according to the invention, in vertical axial section and
  • Figure 2 is a plan view and horizontal section of Figure 1 in which there is shown the path of the parts to be treated by the installation according to the invention.

En se référant au dessin, on voit qu'une installation selon la présente invention se présente sous la forme d'une enceinte 10 ou cabine, à l'intérieur de laquelle s'effectue le revêtement des pièces par pulvérisation. Dans cet exemple de réalisation non limitatif on utilise un système de pulvérisation électro-statique, qui comporte une tête du type disque ou bol circulaire, assurant la distribution de la matière du revêtement. Cette tête de pulvérisation 12 est de type bien connu et par conséquent elle ne sera pas décrite ici. Comme on le voit sur le dessin, la tête de pulvérisation est montée à l'extrémité d'un canon support 14 qui peut se déplacer axialement par l'intermédiaire d'un dispositif classique de chaîne sans fin 16 de façon à imprimer à la tête 12 un mouvement de balayage vertical alternatif à course réglable en fonction de la hauteur des pièces à traiter. Bien entendu un tel système peut être remplacé par tout moyen équivalent par exemple par un dispositif de verin.Referring to the drawing, it can be seen that an installation according to the present invention is in the form of an enclosure 10 or cabin, inside which the parts are coated by spraying. In this nonlimiting exemplary embodiment, an electrostatic spraying system is used, which comprises a head of the disc or circular bowl type, ensuring the distribution of the coating material. This spray head 12 is of a well known type and therefore it will not be described here. As seen in the drawing, the spray head is mounted at the end of a support barrel 14 which can move axially by means of a conventional endless chain device 16 so as to print on the head 12 an alternative vertical sweeping movement with adjustable stroke as a function of the height of the parts to be treated. Of course, such a system can be replaced by any equivalent means, for example by a jack device.

Les pièces à traiter telles que 18 sont suspendues à l'aide de crochets 20, sur un transporteur ou convoyeur 22 qui assure leur défilement devant la tête de pulvérisation 12 qui en effectue leur revêtement.The parts to be treated such as 18 are suspended using hooks 20, on a conveyor or conveyor 22 which ensures their travel past the spray head 12 which coats them.

Ainsi qu'on l'a expliqué dans la description qui précède, l'invention se propose de traiter toutes les faces des pièces à traiter 18 à l'aide d'une tête de pulvérisation unique 12. A cet effet, le parcours suivi par les pièces, c'est à dire la configuration du transporteur ou convoyeur 20 présente une forme originale.As explained in the preceding description, the invention proposes to treat all the faces of the parts to be treated 18 using a single spray head 12. To this end, the path followed by the parts, that is to say the configuration of the conveyor or conveyor 20 has an original shape.

Comme on le voit dans cet exemple de réalisation non limitatif représenté en détail sur la figure 2, le parcours des pièces à traiter présente les parties suivantes :

  • Une première partie 24 sensiblement rectiligne, située à l'intérieur de l'enceinte de pulvérisation 10 et qui amène successivement l'une des faces des pièces à traiter en regard de la tête de pulvérisation 12 sur l'un des côtés de cette dernière ;
  • Une première courbe à 90° 26 suivie d'une seconde courbe également à 90° 28 et dans le même sens que la courbe 26, de manière à ramener les pièces à traiter sur une partie de trajectoire 30, rectiligne, parallèle à la partie de trajectoire 24 mais située à l'extérieur de l'enceinte de traitement 10 ;
  • Une troisième courbe à 90° 32 suivie d'une quatrième courbe 34 également à 90° et dans le même sens que la courbe 32, afin de ramener les pièces à traiter sur une partie de trajectoire 36 sensiblement rectiligne et symétrique à la partie de trajectoire 24 et située comme cette dernière à l'intérieur de l'enceinte de pulvérisation 10. Sur cette partie de trajectoire 36, les pièces à traiter passent devant la tête de pulvérisation 12 qui projette la matière de revêtement sur la face des pièces qui n'a pas été traitée lors du passage de la pièce le long de la partie de trajectoire 24.
As can be seen in this nonlimiting exemplary embodiment shown in detail in FIG. 2, the path of the parts to be treated has the following parts:
  • A first substantially straight portion 24, located inside the spray enclosure 10 and which successively brings one of the faces of the parts to be treated opposite the spray head 12 to one of the sides of the latter;
  • A first curve at 90 ° 26 followed by a second curve also at 90 ° 28 and in the same direction as curve 26, so as to bring the parts to be treated on a part of trajectory 30, rectilinear, parallel to the part of trajectory 24 but located outside of the treatment enclosure 10;
  • A third curve at 90 ° 32 followed by a fourth curve 34 also at 90 ° and in the same direction as curve 32, in order to bring the parts to be treated on a part of trajectory 36 substantially straight and symmetrical to the part of trajectory 24 and located like the latter inside the spray enclosure 10. On this part of the path 36, the parts to be treated pass in front of the spray head 12 which projects the coating material onto the face of the parts which do not was not treated during the passage of the part along the trajectory part 24.

Bien entendu et sans sortir du cadre de la présente invention, la partie de trajectoire dénommée détour qui est constituée par les courbes 26, 28, 32, 34 ainsi que par la partie 30 qui font subir au pièces une rotation de 360° peut présenter toute forme et longueur quelconque.Of course and without departing from the scope of the present invention, the part of the trajectory called a detour which is constituted by the curves 26, 28, 32, 34 as well as by the part 30 which makes the parts undergo a rotation of 360 ° can have any any shape and length.

Comme on le voit sur le dessin, le système de convoyage comporte une partie de trajectoire d'alimentation 38 située à l'extérieur de l'enceinte de pulvérisation 10, qui peut être de forme quelconque, et qui se prolonge selon la première partie rectiligne 24. De même, le système de convoyage comporte une partie de trajectoire d'évacuation 40 qui peut être également de forme quelconque et qui prolonge la partie rectiligne de trajectoire 36 située dans l'enceinte de traitement 10.As can be seen in the drawing, the conveyor system comprises a part of the feed path 38 located outside of the spray enclosure 10, which can be of any shape, and which extends along the first rectilinear part 24. Likewise, the conveying system comprises a part of the evacuation trajectory 40 which can also be of any shape and which extends the straight path portion 36 located in the processing enclosure 10.

Grâce aux perfecftionnements décrits ci-dessus, on peut traiter des pièces présentant toutes formes et dimensions, à l'aide d'une tête unique de pulvérisation 12, la forme de la trajectoire du système de convoyage auquel sont suspendues les pièces 18, permettant d'amener successivement chacune des faces de ladite pièce devant la tête de pulvérisation 12.Thanks to the improvements described above, it is possible to treat parts having all shapes and dimensions, using a single spray head 12, the shape of the trajectory of the conveying system to which the parts 18 are suspended, allowing 'successively bringing each of the faces of said part to the spray head 12.

En outre, dans le système perfectionné selon la présente invention, il n'est pas nécessaire d'utiliser des crochets spéciaux pour la suspension des pièces et celles-ci peuvent être accrochées sur les chariots mobiles des systèmes de convoyage, par l'intérmédiaire d'un ou de plusieurs points d'accrochage en fonction des dimensions des pièces, ce qui permet d'effectuer des revêtements sur les deux faces d'une même pièce à l'aide d'un moyen de pulvérisation unique, sans retournement de la pièce sur son système d'accrochage et de suspension. Par ailleurs, le dispositif selon l'invention permet d'économiser de l'espace par rapport aux solutions antérieures rappelées ci-dessus étant donné que la trajectoire du système de convoyage des pièces à l'intérieur et à l'extérieur de l'enceinte de pulvérisation pour assurer le traitement de toutes les faces de ces pièces est particulièrement compact ainsi que le montre clairement la figure 2.In addition, in the improved system according to the present invention, it is not necessary to use special hooks for hanging the parts and these can be hung on the mobile carriages of the conveyor systems, by means of '' one or more attachment points depending on the dimensions of the parts, which makes it possible to coat the two sides of the same part using a single spraying means, without turning the part on its attachment and suspension system. Furthermore, the device according to the invention saves space compared to the previous solutions mentioned above since the trajectory of the system for conveying the pieces inside and outside the enclosure spray to ensure the treatment of all the faces of these parts is particularly compact as clearly shown in Figure 2.

On remarquera en outre que le système objet de l'invention peut être appliqué à toute installation de pulvérisation comportant un moyen unique de pulvérisation par exemple une seule tête, étant donné qu'il suffit simplement de modifier le système transporteur qui assure le déplacement des pièces à l'intérieur de l'enceinte de traitement.It will also be noted that the system which is the subject of the invention can be applied to any spraying installation comprising a single spraying means, for example a single head, since it is sufficient to modify the conveyor system which ensures the movement of the parts inside the processing enclosure.

Il demeure bien entendu que la présente invention n'est pas limitée aux divers exemples de réalisation décrits ci-dessus mais qu'elle en englobe toutes les variantes telles que décrites dans les revendications. C'est ainsi par exemple que les deux partie 24 36 de la trajectoire du système de convoyage à l'intérieur de la zone de revêtement par pulvérisation peuvent présenter des formes et longueurs différentes en regard de la tête de pulvérisation sans définition géométrique particulière. De même la tête ou le moyen de pulvérisation peut être fixe sans subir de mouvement de balayage et la face de pulvérisation du disque ou du bol, lorsqu'on utilise une tête de pulvérisation électrostatique, peut être situé soit dans un plan horizontal soit dans un plan incliné par rapport à l'horizontale. Enfin, dans la description qui précède on a donné comme exemple d'application une tête de pulvérisation électrostatique. Il ne s'agit là que d'un exemple, on peut en effet utiliser d'autres moyens pour la projection et la pulvérisation du produit de revêtement par exemple un pistolet à pulvérisation par air comprimé ou par haute pression avec ou sans projection additionnelle par champ électrostatique.It remains to be understood that the present invention is not limited to the various embodiments described above but that it encompasses all variants thereof as described in the claims. For example, the two parts 24 36 of the trajectory of the conveyor system inside the spray coating zone can have different shapes and lengths opposite the spray head without any particular geometric definition. Likewise, the spraying head or means can be fixed without undergoing any sweeping movement and the spraying face of the disc or bowl, when using an electrostatic spraying head, can be located either in a horizontal plane or in a plane inclined to the horizontal. Finally, in the above description, an electrostatic spray head has been given as an example of application. This is only an example, other means can be used for spraying and spraying the coating product, for example a spray gun by compressed air or by high pressure with or without additional spraying by electrostatic field.

Claims (7)

  1. Process for coating by electrostatic sputtering with a sputtering means assuring the projection and distribution of the coating material, and before which means the components to be treated move, these components being conveyed along a path such that a single sputtering means (12) can treat alternately the two opposite faces of a component (18), said path comprising:
    - a first part (24) bringing the first face of the components opposite the sputtering means, on one of the sides of this means;
    - a second part (26, 28, 30, 32, 34) bringing the components in displacement to
    - a third part (36) ensuring that the components are presented to the sputtering means (12), these means then carrying out the deposition of the coating material onto the second face of said component (18), characterized in that the path of the components to be treated (18) is horizontal and in that said components undergo a rotation through 360° during the second part (26, 28, 30, 32, 34) of said path.
  2. Device for carrying out the method according to Claim 1, comprising an enclosure or cabin (10), in which the sputtering takes place, a sputtering head (12) positioned in said enclosure, a transporter or conveyor (22) on which the components to be treated (18) are suspended, this transporter having a configuration such that the sputtering head treats the first face of the component on said first part of the trajectory (24) and then the second face of said component on said third part (36) of the trajectory, characterized in that said conveyor (22) is horizontal and its configuration comprises a second trajectory part (26, 28, 30, 32, 34) which comprises:
    - first and second curves (26, 28), each of 90°, orientated in the same sense, followed by a substantially rectilinear portion (30) parallel to said first part (24), this portion (30) being situated outside the sputtering installation and,
    - third and fourth curves (32, 34), each of 90°, orientated in the same sense and outside the sputtering installation.
  3. Device according to Claim 2, characterized in that the first and third parts (24, 36) of the trajectory of the conveyor (22), in the sputtering coating zone, are rectilinear or have a slight curvature opposite the sputtering head (12), this curvature being centred on said head.
  4. Device according to Claim 2, characterized in that the first and third parts (24, 36) of the trajectory of the conveyor (22) are of different shapes and lengths opposite the sputtering head.
  5. Device according to any one of Claims 2 to 4, characterized in that the sputtering head (12) is fixed and is constituted of an electrostatic system, the disc or bowl of which is situated either in a horizontal plane or in a plane inclined to the horizontal.
  6. Device according to any one of Claims 2 to 5, characterized in that the presentation of the components (18) in front of the sputtering head (12) takes place either continuously, or by a rhythmical stopping of said components in a step-by-step movement.
  7. Device according to Claim 2, characterized in that the sputtering head (12) is given a sweeping movement, created by an endless chain system (16) or by a ram.
EP90400119A 1989-01-24 1990-01-16 Spray coating method and spray coating installation Expired - Lifetime EP0380386B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90400119T ATE98914T1 (en) 1989-01-24 1990-01-16 SPRAY COATING PROCESS AND SPRAY COATING EQUIPMENT.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8900829 1989-01-24
FR8900829A FR2641989B1 (en) 1989-01-24 1989-01-24 IMPROVEMENTS TO SPRAY COATING FACILITIES

Publications (3)

Publication Number Publication Date
EP0380386A2 EP0380386A2 (en) 1990-08-01
EP0380386A3 EP0380386A3 (en) 1991-05-02
EP0380386B1 true EP0380386B1 (en) 1993-12-22

Family

ID=9378033

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90400119A Expired - Lifetime EP0380386B1 (en) 1989-01-24 1990-01-16 Spray coating method and spray coating installation

Country Status (4)

Country Link
EP (1) EP0380386B1 (en)
AT (1) ATE98914T1 (en)
DE (1) DE69005320T2 (en)
FR (1) FR2641989B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113019763B (en) * 2020-12-10 2022-01-14 浙江工业大学 Spraying robot track planning method based on grid projection algorithm

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2261146A1 (en) * 1974-02-20 1975-09-12 Saunal Pierre Apparatus for painting both sides of articles - spaced chains carry suspended articles along U shaped path past sprays

Also Published As

Publication number Publication date
DE69005320T2 (en) 1994-07-07
FR2641989A1 (en) 1990-07-27
EP0380386A2 (en) 1990-08-01
FR2641989B1 (en) 1992-03-13
ATE98914T1 (en) 1994-01-15
EP0380386A3 (en) 1991-05-02
DE69005320D1 (en) 1994-02-03

Similar Documents

Publication Publication Date Title
EP1723060A1 (en) Conveyor device with an improved transfer arm
FR2806395A1 (en) CONVEYOR CURVE SECTION WITH ADJUSTABLE GAP GUIDE RAILS
FR3027825A1 (en) DEVICE FOR REMOTE SURFACE PREPARATION OF A PIECE
FR2460865A1 (en) APPARATUS FOR INTERMITTENT TRAINING OF A SUCCESSION OF SIMILAR OBJECTS
EP0380386B1 (en) Spray coating method and spray coating installation
EP1472062B1 (en) Installation for assembling tube components
LU83084A1 (en) DEVICE FOR SUPPORTING THE FIRST PASS WELDING BATH IN THE AUTOMATIC TUBE WELDING
EP0629484B1 (en) Method and arrangement for positioning a container or a preform of a container with a predetermined angular orientation onto a support mandrel
EP2684822A1 (en) Device to increase the step for positive and individual transfer of objects
EP1401746A2 (en) Device for transporting parts for supplying machines
EP0573352B1 (en) Device for loading containers onto a carrying member
EP0059675B1 (en) Apparatus for rapidly cooling metallic pipes
FR2653193A1 (en) ADJUSTMENT AND LOCKING DEVICE FOR MOUNTING A CYCLE WHEEL HUB.
FR2549809A3 (en) ANGULAR CONVEYOR DEVICE WITH BANDS FOR PASTRY ARTICLES
EP0543748B1 (en) Process and equipment for coating articles based on synthetic resins or similar products
FR2676717A1 (en) APPARATUS FOR LOADING BULK PRODUCTS WITH VERTICAL CONVEYORS.
BE1010797A3 (en) Method and device for forming a coating on a substrate, by sputtering.
EP0063992A1 (en) Electrostatic painting process for small objects carried by an omega-shaped conveyor
FR3100006A1 (en) WIRE FEEDING SYSTEM EQUIPPED WITH A WIRE CLEANING DEVICE
EP1949408B1 (en) Method and device for colouring a metal strip in vacuum by magnetron sputtering
EP0781170B1 (en) Device for projecting a magnetic element charged coating
FR2708882A1 (en) Method and device for straightening metal wires for a bending machine
FR3093934A1 (en) System for setting a product application nozzle in motion
FR2681537A1 (en) Method and device for temporarily holding hollow articles
FR2522992A1 (en) WORKPIECE TREATMENT APPARATUS, ENVELOPE AND WEAR RESISTANT WEAR FOR USE WITH A CENTRIFUGAL PROJECTION WHEEL, AND METHOD FOR REMOVING THE SURFACE OF A WORKPIECE

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

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL

17P Request for examination filed

Effective date: 19911029

17Q First examination report despatched

Effective date: 19920901

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19931222

Ref country code: NL

Effective date: 19931222

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19931222

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19931222

Ref country code: DK

Effective date: 19931222

Ref country code: AT

Effective date: 19931222

REF Corresponds to:

Ref document number: 98914

Country of ref document: AT

Date of ref document: 19940115

Kind code of ref document: T

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

Ref country code: FR

Payment date: 19940119

Year of fee payment: 5

ITF It: translation for a ep patent filed

Owner name: UFFICIO BREVETTI GUAZZO

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19940131

Ref country code: LI

Effective date: 19940131

Ref country code: CH

Effective date: 19940131

Ref country code: BE

Effective date: 19940131

REF Corresponds to:

Ref document number: 69005320

Country of ref document: DE

Date of ref document: 19940203

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19940310

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
BERE Be: lapsed

Owner name: GRACO FRANCE

Effective date: 19940131

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19950110

Year of fee payment: 6

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

Ref country code: DE

Payment date: 19950228

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19950929

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19960116

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19960116

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19961001

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050116