EP2164644B1 - Rotary atomizer for coating product and device including such atomizer - Google Patents

Rotary atomizer for coating product and device including such atomizer Download PDF

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Publication number
EP2164644B1
EP2164644B1 EP08826448.6A EP08826448A EP2164644B1 EP 2164644 B1 EP2164644 B1 EP 2164644B1 EP 08826448 A EP08826448 A EP 08826448A EP 2164644 B1 EP2164644 B1 EP 2164644B1
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EP
European Patent Office
Prior art keywords
primary
orifices
rotation
axis
sprayer according
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EP08826448.6A
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German (de)
French (fr)
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EP2164644A1 (en
Inventor
Patrick Ballu
Olivier Gourbat
Eric Prus
Denis Vanzetto
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Sames Kremlin SAS
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Sames Technologies SAS
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Priority to PL08826448T priority Critical patent/PL2164644T3/en
Publication of EP2164644A1 publication Critical patent/EP2164644A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
    • B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces
    • B05B3/1092—Means for supplying shaping gas

Definitions

  • the present invention relates to a rotary projector coating product, and a coating product projection installation comprising at least one such projector.
  • a rotary coating product projection projector comprises a spraying member rotating at high speed under the effect of rotating drive means, such as a compressed air turbine.
  • Such a spraying member generally has the shape of a rotationally symmetrical bowl and it comprises at least one spraying edge capable of forming a jet of coating product.
  • the rotating projector also comprises a fixed body housing the rotating drive means as well as means for supplying the spray member with coating material.
  • the jet of coating material sprayed from the edge of the rotating member has a generally conical shape which depends on such parameters as the rotation speed of the bowl and the flow rate of the coating product.
  • the rotating projectors of the prior art are generally equipped with several primary orifices formed in the body of the projector and arranged on a circle centered on the axis of symmetry of the bowl.
  • the primary orifices are intended to emit jets of primary air together forming an air of conformation of the jet of product, this air of conformation being sometimes called air of skirt.
  • JP-A-8,071,455 discloses a rotating projector provided with primary orifices for emitting jets of primary air to conform the jet of product.
  • Each primary air jet is inclined relative to the axis of rotation of the bowl in a primary direction having an axial component and an orthoradial component.
  • the primary air jets thus generate a flow of air swirling around the axis of rotation of the bowl and the jet of product of coating.
  • This swirling air flow sometimes called "vortex" allows, in particular by adjusting its flow rate, to conform the jet of sprayed product by the edge depending on the desired application.
  • the rotating projector body shown in Figure 6 of JP-A-8,071,455 is provided with several secondary orifices arranged on the same circle as the primary orifices and offset with respect to these.
  • Each secondary air jet from one of these secondary orifices is inclined relative to the axis of rotation in a secondary direction having an axial component and a radial component. These components are determined to inject air streams in front of the downstream face of the bowl, to reduce the depression caused by the rotation of the bowl at high speed.
  • the secondary air jets are intended to obtain a uniform deposited paint film.
  • the secondary air jets reach directly into the depression zone located in front of the bowl and downstream thereof.
  • the direction of each jet of secondary air is determined so as to prevent this jet of secondary air does not hit the rear surface of the bowl.
  • the present invention aims in particular to overcome these disadvantages by providing a rotary coating product projection device offering a wide latitude in adjusting the shape of the product jet.
  • each secondary air jet is such that said secondary air jet strikes an outer surface of the spray member.
  • the secondary air jets burst on the spraying member, which allows a fine and uniform adjustment of the jet of sprayed product.
  • the invention relates to a coating product projection installation, characterized in that it comprises at least one rotating projector as explained above.
  • the figure 1 shows a rotating projector for the projection of coating product comprising a spraying member 1, hereinafter referred to as a bowl, partially housed within a body 2.
  • the bowl 1 is shown in a spray position where it is rotated at high speed about an axis X 1 by unrepresented drive means.
  • the body 2 is fixed, that is to say it does not rotate about the axis X 1 , and it can be mounted on a not shown support such as a multi-axis robot arm.
  • a distributor 3 is secured to the upstream portion of the bowl 1 to channel and distribute the coating product.
  • the speed of rotation of the bowl 1 under load that is to say when spraying the product, can be between 30,000 rpm and 70,000 rpm.
  • the bowl 1 has a symmetry of revolution about the axis X 1 .
  • the bowl 1 has a distribution surface 11 on which the coating product spreads, under the effect of centrifugal force, to a spray edge 12 where it is micronized into fine droplets.
  • the set of droplets forms a jet J 1 of product leaving the bowl 1 and heading towards a not shown coating object on which it produces an impact surface.
  • the outer rear surface 13 of the bowl that is to say the surface which is not turned towards its axis of symmetry X 1 , is turned towards the body 2.
  • the body 2 has primary orifices 4 and secondary orifices 6 arranged on the same circle C centered on the axis of symmetry X 1 of the bowl 1.
  • the primary and secondary orifices 4 4 are intended to emit respectively primary air jets and secondary air jets which are represented in the figures by their respective directions J 4 and J 6 .
  • the edge 12 is at an axial distance L 1 of the circle C which is here 10 mm.
  • the distance L 1 thus represents the passing of the bowl 1 out of the body 2.
  • the primary directions J 4 and secondary J 6 are here respectively determined by the inclinations of primary channels 40 and secondary channels 60 defined in the body 2.
  • the channels 40 and 60 are rectilinear and open respectively to the primary ports 4 and secondary 6. Upstream, the channels 40 and 60 are connected to two independent sources of compressed air supply described below to form the jets J 4 and J 6 .
  • each primary air jet is inclined with respect to the axis of rotation X 1 in a primary direction J 4 , which has an axial component A 4 and a orthoradial component O 4 .
  • the components A 4 and O 4 are such that a primary air jet J 4 can freely cross the region where the edge 12 is located.
  • the primary jets J 4 do not hit the rear surface 13 of the bowl 1.
  • a primary direction J 4 is oblique with respect to the axis X 1 it does not intersect.
  • the primary jets J 4 together generate a swirling air flow, or vortex air, capable of influencing the shape of the coating product jet.
  • the components A 4 and O 4 of a primary air jet J4 are determined so that this jet flows at a radial distance l 4 from the edge 12 of 1.5 mm.
  • the distance l 4 can be between 0 mm and 25 mm.
  • the distance l 4 depends in particular on the axial distance L 1 . Thus, when the distance L 1 is 50 mm, the distance l 4 can be between 0 and 50 mm.
  • Each secondary air jet is inclined relative to the axis of rotation X 1 in a secondary direction J 6 having an axial component A 6 and a radial component R 6 .
  • the components A 6 and R 6 are determined so that a jet of secondary air J 6 impinges on the rear surface 13 of the bowl 1, as is clearly apparent from the figure 2 .
  • the secondary direction J 6 is transverse to the axis of rotation X 1 .
  • the secondary direction J 6 here has a zero orthoradial component, so that it can be likened to a generator of a cone whose vertex belongs to the axis X 1 .
  • the secondary air jet J 6 illustrated by the figure 2 strikes the rear surface 13 at a zone 136, then spreads on the portion of the surface 13 located downstream of the zone 136 to the edge 12 and beyond in the axial direction X 1 .
  • This makes it possible to generate a secondary air stream in the form of a relatively uniform sheet and able to adjust the shape of the jet of product, thus modifying the impact surface on the object to be coated.
  • the zone 136 is located upstream of the edge 12 at an axial distance L 136 of 28 mm here. In practice, the distance L 136 can be between 0 mm and 10 mm.
  • the diameter D of the circle C which depends in particular on the diameter of the edge 12, is here 68 mm for a bowl 1 of diameter equal to 55 mm. In practice, it may be between 58 mm and 80 mm for such a bowl.
  • the primary orifices 4 are arranged alternately with the secondary orifices 6.
  • the primary and secondary orifices 4 and 6 are distributed uniformly over the circle C, so that two successive primary orifices 4 or two successive secondary orifices 6 are spaced apart by the same angle ⁇ equal to 12 °.
  • this angle ⁇ can be between 6 ° and 24 °.
  • a primary orifice 4 and a neighboring secondary orifice 6 are spaced apart by an angle ⁇ equal to 6 °, that is to say half the angle ⁇ separating, for example, two successive primary orifices 4.
  • the angular difference ⁇ between a primary orifice 4 and a secondary orifice 6 may be between 3 ° and 12 °.
  • the number and the distribution of the primary and secondary orifices 6 is determined according to the precision sought for the control of the shape of the product jet and the desired regularity for the impact surface. Thus, the more numerous the orifices 4 and 6, the more the impact surface is regular. Alternatively, there may be primary orifices and secondary orifices in different numbers.
  • the primary and secondary orifices 4 have respective diameters d 4 and d 6 of 0.8 mm and 0.8 mm. Such dimensions make it possible to emit primary and secondary air jets with flow rates of 700 L / min and 500 L / min respectively, when they are fed at pressures of 6 bars and 6 bars, respectively.
  • the diameters d 4 and d 6 of the primary and secondary orifices 4 and 6 may respectively be between 0.5 mm and 1.5 mm and between 0.5 mm and 1.5 mm. In particular, the diameters d 4 and d 6 may be different from each other.
  • the primary and secondary channels 40 extend rectilinearly through an outer jacket 22 which extends a cap 20 defining the outer casing of the body 2.
  • the channels 40 and 60 are made by means of drilling operations according to the appropriate angles.
  • the primary channels 40 are connected upstream to a primary chamber 23 which is common to them and which is itself connected to a source of compressed air not shown.
  • the secondary channels 60 are connected to a secondary chamber 25 which is common to them and which is connected to a source of compressed air not shown and independent of the source supplying the primary channels 40.
  • the primary and secondary chambers 23 are here formed between the outer jacket 22 and an inner liner 24, and they are separated by an O-ring seal 26.
  • the internal adjective here means an object close to the axis of rotation X 1
  • the external adjective refers to an object that is further away.
  • the shirts 22 and 24 generally have a symmetry of revolution about the axis X 1 .
  • the primary channels 40 and / or secondary 60 may be defined by interstices formed between the outer jack 22 and inner 24. These interstices can in this case be made by machining notches on one and / or the other of facing surfaces of the inner and outer sleeves 24 and 22.
  • FIG 5 illustrates a variant of the rotating projector of Figures 1 to 4 in which the numerical references are incremented by 100 to designate objects similar to those of Figures 1 to 4 .
  • This rotating projector for projecting coating product comprises a bowl 101 similar to the bowl 1 and housed partially within a body 102 fixed.
  • the bowl 101 can be rotated at high speed around an axis X 101 and is supplied with product via a distributor 103.
  • the bowl 101 has a distribution surface 111 on which the coating product spreads to a spray edge 112 where it is micronized into fine droplets.
  • the body 102 has primary, secondary 104 and tertiary orifices 108 respectively disposed on primary C 104 , secondary C 106 and tertiary C 108 primary contours.
  • the contours C 104 , C 106 and C 108 are planar and respectively elliptical, circular and rectangular.
  • the orifices 104, 106 and 108 are intended to emit respectively primary, secondary and tertiary air jets which are represented on the figure 5 by their respective directions J 104 , J 106 and J 108 .
  • the primary C 104 and tertiary C 108 contours are centered on the axis of rotation X 101 and have shapes, respectively elliptical and rectangular with rounded corners, which are elongated along the same main direction.
  • the jets of primary air J 104 and tertiary J 108 make it possible to conform the jet of sprayed product by flattening it. This makes it possible to optimize the recovery of the impacts on the object to be coated and, consequently, the uniformity of the deposited thickness.
  • the orifices 104, 106 or 108 are associated in four subgroups of orifices so as to form four quadrants I, II, III and IV.
  • the orifices of the same subgroup delimited by a quadrant are juxtaposed step by step, that is to say that they form an uninterrupted sequence.
  • Each subgroup is connected to an independent source of compressed air supply through a valve not shown.
  • the four valves of the four subgroups of the same contour are independent of each other, so that the shape of the primary, secondary and tertiary air jets can be modulated. For this, it is possible to supply compressed air to the orifices of certain quadrants without supplying those of the remaining quadrants.
  • the division of the subgroups can be done other than by quadrants.
  • the directions J 6 or J 106 of the secondary air jets may be more or less inclined in the radial direction, so as to hit the bowl at a distance L 136 of the variable edge of an orifice to another.
  • controlling the air jets of the projector Figures 1 to 4 can be achieved by quadrant.

Landscapes

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

Description

La présente invention concerne un projecteur rotatif de produit de revêtement, ainsi qu'une installation de projection de produit de revêtement comprenant au moins un tel projecteur.The present invention relates to a rotary projector coating product, and a coating product projection installation comprising at least one such projector.

La pulvérisation conventionnelle au moyen de projecteurs rotatifs est utilisée pour appliquer sur des objets à revêtir, tels que des carrosseries de véhicules automobiles, un apprêt, une couche de base et/ou un vernis. Un projecteur rotatif de projection de produit de revêtement comporte un organe de pulvérisation tournant à haute vitesse sous l'effet de moyens d'entraînement en rotation, tels qu'une turbine à air comprimé.Conventional spraying by means of rotating projectors is used to apply on objects to be coated, such as motor vehicle bodies, a primer, a base coat and / or a varnish. A rotary coating product projection projector comprises a spraying member rotating at high speed under the effect of rotating drive means, such as a compressed air turbine.

Un tel organe de pulvérisation présente généralement la forme d'un bol à symétrie de révolution et il comporte au moins une arête de pulvérisation apte à former un jet de produit de revêtement. Le projecteur rotatif comporte également un corps fixe logeant les moyens d'entraînement en rotation ainsi que des moyens d'alimentation de l'organe de pulvérisation en produit de revêtement.Such a spraying member generally has the shape of a rotationally symmetrical bowl and it comprises at least one spraying edge capable of forming a jet of coating product. The rotating projector also comprises a fixed body housing the rotating drive means as well as means for supplying the spray member with coating material.

Le jet de produit de revêtement pulvérisé par l'arête de l'organe tournant présente une forme globalement conique qui dépend de paramètres tels que la vitesse de rotation du bol et le débit de produit de revêtement. Pour contrôler la forme de ce jet de produit, les projecteurs rotatifs de l'art antérieur sont généralement équipés de plusieurs orifices primaires formés dans le corps du projecteur et disposés sur un cercle centré sur l'axe de symétrie du bol. Les orifices primaires sont destinés à émettre des jets d'air primaire formant ensemble un air de conformation du jet de produit, cet air de conformation étant parfois dénommé air de jupe.The jet of coating material sprayed from the edge of the rotating member has a generally conical shape which depends on such parameters as the rotation speed of the bowl and the flow rate of the coating product. To control the shape of this product jet, the rotating projectors of the prior art are generally equipped with several primary orifices formed in the body of the projector and arranged on a circle centered on the axis of symmetry of the bowl. The primary orifices are intended to emit jets of primary air together forming an air of conformation of the jet of product, this air of conformation being sometimes called air of skirt.

JP-A-8 071 455 décrit un projecteur rotatif muni d'orifices primaires destinés à émettre des jets d'air primaire pour conformer le jet de produit. Chaque jet d'air primaire est incliné par rapport à l'axe de rotation du bol selon une direction primaire présentant une composante axiale et une composante orthoradiale. Les jets d'air primaire génèrent ainsi un flux d'air tourbillonnant autour de l'axe de rotation du bol et du jet de produit de revêtement. Ce flux d'air tourbillonnant, parfois qualifié de « vortex », permet, notamment par le réglage de son débit, de conformer le jet de produit pulvérisé par l'arête en fonction de l'application recherchée. JP-A-8,071,455 discloses a rotating projector provided with primary orifices for emitting jets of primary air to conform the jet of product. Each primary air jet is inclined relative to the axis of rotation of the bowl in a primary direction having an axial component and an orthoradial component. The primary air jets thus generate a flow of air swirling around the axis of rotation of the bowl and the jet of product of coating. This swirling air flow, sometimes called "vortex", allows, in particular by adjusting its flow rate, to conform the jet of sprayed product by the edge depending on the desired application.

Le corps du projecteur rotatif illustré à la figure 6 de JP-A-8 071 455 est pourvu de plusieurs orifices secondaires disposés sur le même cercle que les orifices primaires et de façon décalée par rapport à ces derniers. Chaque jet d'air secondaire issu de l'un de ces orifices secondaires est incliné par rapport à l'axe de rotation selon une direction secondaire présentant une composante axiale et une composante radiale. Ces composantes sont déterminées de manière à injecter des flux d'air devant la face aval du bol, afin de réduire la dépression causée par la rotation du bol à haute vitesse.The rotating projector body shown in Figure 6 of JP-A-8,071,455 is provided with several secondary orifices arranged on the same circle as the primary orifices and offset with respect to these. Each secondary air jet from one of these secondary orifices is inclined relative to the axis of rotation in a secondary direction having an axial component and a radial component. These components are determined to inject air streams in front of the downstream face of the bowl, to reduce the depression caused by the rotation of the bowl at high speed.

Ainsi, les jets d'air secondaire sont destinés à obtenir un film de peinture déposé uniforme. Dans ce but, il est nécessaire que les jets d'air secondaire parviennent directement dans la zone de dépression située face au bol et en aval de celui-ci. La direction de chaque jet d'air secondaire est donc déterminée de manière à éviter que ce jet d'air secondaire ne vienne frapper la surface arrière du bol.Thus, the secondary air jets are intended to obtain a uniform deposited paint film. For this purpose, it is necessary that the secondary air jets reach directly into the depression zone located in front of the bowl and downstream thereof. The direction of each jet of secondary air is determined so as to prevent this jet of secondary air does not hit the rear surface of the bowl.

Toutefois, de tels flux d'air secondaire requièrent des réglages délicats pour éviter de détériorer la forme du jet de produit de revêtement. De plus, des jets d'air secondaire ainsi inclinés ne permettent pas de régler la forme du jet de produit ni, par conséquent, la surface d'impact des gouttelettes pulvérisées sur l'objet à revêtir.However, such secondary air flows require delicate adjustments to avoid damaging the shape of the coating product jet. In addition, the secondary air jets thus inclined do not adjust the shape of the jet of product and, therefore, the impact surface of the sprayed droplets on the object to be coated.

La présente invention vise notamment à remédier à ces inconvénients en proposant un dispositif rotatif de projection de produit de revêtement offrant une grande latitude de réglage de la forme du jet de produit.The present invention aims in particular to overcome these disadvantages by providing a rotary coating product projection device offering a wide latitude in adjusting the shape of the product jet.

A cet effet, l'invention concerne un projecteur rotatif de produit de revêtement comportant :

  • un organe de pulvérisation du produit présentant au moins une arête de pulvérisation apte à former un jet de produit,
  • des moyens d'entraînement dudit organe en rotation et
  • un corps fixe présentant des orifices primaires disposés sur un contour primaire entourant l'axe de rotation dudit organe ainsi que des orifices secondaires disposés sur un contour secondaire entourant l'axe de rotation dudit organe de façon décalée par rapport aux orifices primaires, les orifices primaires et secondaires étant destinés à émettre respectivement des jets d'air primaire et des jets d'air secondaire, chaque jet d'air primaire étant incliné par rapport à l'axe de rotation selon une direction primaire présentant au moins une composante axiale et une composante orthoradiale telles que ledit jet d'air primaire franchit librement la région où se trouve l'arête, chaque jet d'air secondaire étant incliné par rapport à l'axe de rotation selon une direction secondaire présentant au moins une composante axiale et une composante radiale, les contours primaire et secondaire étant confondus en un cercle centré sur l'axe de rotation.
For this purpose, the invention relates to a rotary projector coating product comprising:
  • a product spraying member having at least one spray edge capable of forming a jet of product,
  • means for driving said rotating member and
  • a fixed body having primary orifices disposed on a primary contour surrounding the axis of rotation of said member as well as secondary orifices disposed on a secondary contour surrounding the axis of rotation of said member offset from the primary orifices, the primary orifices and secondary being intended to emit respectively primary air jets and secondary air jets, each primary air jet being inclined with respect to the axis of rotation in a primary direction having at least one axial component and one component orthoradiale such that said primary air jet freely crosses the region where the edge is located, each secondary air jet being inclined relative to the axis of rotation in a secondary direction having at least one axial component and one radial component , the primary and secondary contours being merged into a circle centered on the axis of rotation.

Selon l'invention, les composantes de chaque jet d'air secondaire sont telles que ledit jet d'air secondaire frappe une surface externe de l'organe de pulvérisation.According to the invention, the components of each secondary air jet are such that said secondary air jet strikes an outer surface of the spray member.

Grâce à l'invention, les jets d'air secondaire éclatent sur l'organe de pulvérisation, ce qui permet un réglage fin et uniforme du jet de produit pulvérisé.Thanks to the invention, the secondary air jets burst on the spraying member, which allows a fine and uniform adjustment of the jet of sprayed product.

Selon d'autres caractéristiques avantageuses mais facultatives de l'invention, prises isolément ou selon toute combinaison techniquement possible :

  • le corps présente, en outre, des orifices tertiaires disposés sur un contour tertiaire entourant l'axe de rotation et destinés à émettre des jets d'air tertiaire, chaque jet d'air tertiaire étant incliné par rapport à l'axe de rotation selon une direction tertiaire présentant des composantes axiale, radiale et orthoradiale telles que ledit jet d'air tertiaire franchit librement la région où se trouve l'arête ;
  • au moins un des contours présente une forme régulière et non circulaire, par exemple elliptique ou rectangulaire ;
  • les orifices disposés sur chaque contour sont associés en sous-groupes d'orifices juxtaposés de proche en proche, chacun des sous-groupes étant relié à une source indépendante d'alimentation en air comprimé par l'intermédiaire d'une vanne, les vannes étant pilotables indépendamment les unes des autres ;
  • la direction secondaire présente une composante orthoradiale nulle ;
  • le corps présente des canaux primaires et secondaires débouchant respectivement sur les orifices primaires et secondaires, les canaux primaires et secondaires étant inclinés par rapport à l'axe de rotation respectivement selon les directions primaires et secondaires ;
  • les canaux primaires et secondaires sont réalisés par perçage à travers une chemise externe et/ou constitués par des interstices formés entre la chemise externe et une chemise interne, les chemises étant disposées autour des moyens d'entraînement de l'organe en rotation et d'une partie arrière de l'organe ;
  • les canaux primaires et secondaires sont reliés respectivement à une chambre commune primaire et à une chambre commune secondaire, ces chambres étant définies dans le corps et constituant deux sources indépendantes d'alimentation en air comprimé ;
  • les orifices primaires sont agencés sur le cercle en alternance avec les orifices secondaires ;
  • les composantes des jets d'air primaire sont déterminées de sorte que les jets d'air primaire s'écoulent à une distance radiale de l'arête comprise entre 0 mm et 25 mm et, de préférence, égale à 1,5 mm ;
  • les composantes des jets d'air secondaire sont déterminées de sorte que les jets d'air secondaire frappent l'organe à une distance axiale de l'arête comprise entre 0 mm et 10 mm et, de préférence, égale à 2,8 mm ;
  • le cercle sur lequel sont disposés les orifices primaires et secondaires a un diamètre compris entre 58 mm et 80 mm et, de préférence, égal à 68 mm pour un bol de diamètre égal à 55 mm.
According to other advantageous but optional features of the invention, taken separately or in any technically possible combination:
  • the body has, in addition, tertiary orifices arranged on a tertiary contour surrounding the axis of rotation and intended to emit jets of tertiary air, each tertiary air jet being inclined with respect to the axis of rotation according to a tertiary direction having axial, radial and orthoradial components such that said tertiary air jet freely passes the region where the edge is located;
  • at least one of the contours has a regular shape and not circular, for example elliptical or rectangular;
  • the orifices arranged on each contour are associated in subgroups of orifices juxtaposed step by step, each of the subgroups being connected to an independent source of air supply compressed by means of a valve, the valves being controllable independently of one another;
  • the secondary direction has a zero orthoradial component;
  • the body has primary and secondary channels opening respectively to the primary and secondary ports, the primary and secondary channels being inclined relative to the axis of rotation respectively in the primary and secondary directions;
  • the primary and secondary channels are made by drilling through an outer jacket and / or constituted by interstices formed between the outer jacket and an inner jacket, the jackets being arranged around the drive means of the rotating member and a rear part of the organ;
  • the primary and secondary channels are respectively connected to a primary common chamber and a secondary common chamber, these chambers being defined in the body and constituting two independent sources of compressed air supply;
  • the primary orifices are arranged on the circle alternating with the secondary orifices;
  • the components of the primary air jets are determined so that the primary air jets flow at a radial distance from the edge of between 0 mm and 25 mm and, preferably, equal to 1.5 mm;
  • the components of the secondary air jets are determined so that the jets of secondary air strike the member at an axial distance from the edge of between 0 mm and 10 mm and preferably equal to 2.8 mm;
  • the circle on which the primary and secondary orifices are arranged has a diameter of between 58 mm and 80 mm and, preferably, equal to 68 mm for a bowl of diameter equal to 55 mm.

D'autre part, l'invention concerne une installation de projection de produit de revêtement, caractérisée en ce qu'elle comprend au moins un projecteur rotatif tel qu'exposé ci-dessus.On the other hand, the invention relates to a coating product projection installation, characterized in that it comprises at least one rotating projector as explained above.

L'invention sera mieux comprise et d'autres avantages de celle-ci apparaîtront plus clairement à la lumière de la description qui va suivre d'un dispositif rotatif et d'une installation conformes à l'invention, donnée uniquement à titre d'exemple et faite en référence aux dessins annexés dans lesquels :

  • la figure 1 est une vue en perspective tronquée d'un projecteur conforme à l'invention ;
  • la figure 2 est une vue partielle de côté du projecteur de la figure 1 ;
  • la figure 3 est une vue de face du projecteur de la figure 1 ;
  • la figure 4 est une vue en perspective, à plus petite échelle et avec arraché, du projecteur de la figure 1 ;
  • la figure 5 est une vue de face d'un projecteur conforme à un autre mode de réalisation de l'invention.
The invention will be better understood and other advantages thereof will appear more clearly in the light of the following description of a rotary device and an installation according to the invention, given solely by way of example and with reference to the appended drawings in which:
  • the figure 1 is a truncated perspective view of a projector according to the invention;
  • the figure 2 is a partial side view of the projector from the figure 1 ;
  • the figure 3 is a front view of the projector from the figure 1 ;
  • the figure 4 is a perspective view, on a smaller scale and ripped off, from the projector of the figure 1 ;
  • the figure 5 is a front view of a projector according to another embodiment of the invention.

La figure 1 montre un projecteur rotatif pour la projection de produit de revêtement comportant un organe de pulvérisation 1, ci-après dénommé bol, logé partiellement au sein d'un corps 2. Le bol 1 est représenté dans une position de pulvérisation où il est entraîné en rotation à haute vitesse autour d'un axe X1 par des moyens d'entraînement non représentés. Le corps 2 est fixe, c'est-à-dire qu'il ne tourne pas autour de l'axe X1, et il peut être monté sur un support non représenté tel qu'un bras de robot multi-axes.The figure 1 shows a rotating projector for the projection of coating product comprising a spraying member 1, hereinafter referred to as a bowl, partially housed within a body 2. The bowl 1 is shown in a spray position where it is rotated at high speed about an axis X 1 by unrepresented drive means. The body 2 is fixed, that is to say it does not rotate about the axis X 1 , and it can be mounted on a not shown support such as a multi-axis robot arm.

Un distributeur 3 est solidarisé à la partie amont du bol 1 pour canaliser et répartir le produit de revêtement. La vitesse de rotation du bol 1 en charge, c'est-à-dire lorsqu'il pulvérise du produit, peut être comprise entre 30.000 tours/min et 70.000 tours/min.A distributor 3 is secured to the upstream portion of the bowl 1 to channel and distribute the coating product. The speed of rotation of the bowl 1 under load, that is to say when spraying the product, can be between 30,000 rpm and 70,000 rpm.

Le bol 1 présente une symétrie de révolution autour de l'axe X1. Le bol 1 comporte une surface de répartition 11 sur laquelle le produit de revêtement s'étale, sous l'effet de la force centrifuge, jusqu'à une arête de pulvérisation 12 où il est micronisé en fines gouttelettes. L'ensemble des gouttelettes forme un jet J1 de produit quittant le bol 1 et se dirigeant vers un objet à revêtir non représenté sur lequel il produit une surface d'impact. La surface arrière externe 13 du bol 1, c'est-à-dire la surface qui n'est pas tournée vers son axe de symétrie X1, est tournée vers le corps 2.The bowl 1 has a symmetry of revolution about the axis X 1 . The bowl 1 has a distribution surface 11 on which the coating product spreads, under the effect of centrifugal force, to a spray edge 12 where it is micronized into fine droplets. The set of droplets forms a jet J 1 of product leaving the bowl 1 and heading towards a not shown coating object on which it produces an impact surface. The outer rear surface 13 of the bowl 1, that is to say the surface which is not turned towards its axis of symmetry X 1 , is turned towards the body 2.

Le corps 2 présente des orifices primaires 4 et des orifices secondaires 6 disposés sur un même cercle C centré sur l'axe de symétrie X1 du bol 1. Les orifices primaires 4 et secondaires 6 sont destinés à émettre respectivement des jets d'air primaire et des jets d'air secondaire qui sont représentés sur les figures par leurs directions respectives J4 et J6.The body 2 has primary orifices 4 and secondary orifices 6 arranged on the same circle C centered on the axis of symmetry X 1 of the bowl 1. The primary and secondary orifices 4 4 are intended to emit respectively primary air jets and secondary air jets which are represented in the figures by their respective directions J 4 and J 6 .

L'arête 12 se trouve à une distance axiale L1 du cercle C qui vaut ici 10 mm. La distance L1 représente donc le dépassement du bol 1 hors du corps 2.The edge 12 is at an axial distance L 1 of the circle C which is here 10 mm. The distance L 1 thus represents the passing of the bowl 1 out of the body 2.

Les directions primaire J4 et secondaire J6 sont ici déterminées respectivement par les inclinaisons de canaux primaires 40 et de canaux secondaires 60 définis dans le corps 2. Dans l'exemple des figures, les canaux 40 et 60 sont rectilignes et débouchent respectivement sur les orifices primaires 4 et secondaires 6. En amont, les canaux 40 et 60 sont reliés à deux sources indépendantes d'alimentation en air comprimé décrites ci-après pour former les jets J4 et J6.The primary directions J 4 and secondary J 6 are here respectively determined by the inclinations of primary channels 40 and secondary channels 60 defined in the body 2. In the example of the figures, the channels 40 and 60 are rectilinear and open respectively to the primary ports 4 and secondary 6. Upstream, the channels 40 and 60 are connected to two independent sources of compressed air supply described below to form the jets J 4 and J 6 .

Comme le montrent les figures 1 à 3, chaque jet d'air primaire est incliné par rapport à l'axe de rotation X1 selon une direction primaire J4, laquelle présente une composante axiale A4 et une composante orthoradiale O4. Les composantes A4 et O4 sont telles qu'un jet d'air primaire J4 peut franchir librement la région où se trouve l'arête 12.As shown by Figures 1 to 3 each primary air jet is inclined with respect to the axis of rotation X 1 in a primary direction J 4 , which has an axial component A 4 and a orthoradial component O 4 . The components A 4 and O 4 are such that a primary air jet J 4 can freely cross the region where the edge 12 is located.

En d'autres termes, les jets primaires J4 ne frappent pas la surface arrière 13 du bol 1. Une direction primaire J4 est donc oblique par rapport à l'axe X1 qu'elle n'intersecte pas. Les jets primaires J4 génèrent ensemble un flux d'air tourbillonnant, ou air de vortex, apte à influencer la forme du jet de produit de revêtement. Les composantes A4 et O4 d'un jet d'air primaire J4 sont déterminées de sorte que ce jet s'écoule à une distance radiale ℓ4 de l'arête 12 valant 1,5 mm. En pratique, la distance ℓ4 peut être comprise entre 0 mm et 25 mm. La distance ℓ4 dépend notamment de la distance axiale L1. Ainsi, lorsque la distance L1 vaut 50 mm, la distance ℓ4 peut être comprise entre 0 et 50 mm.In other words, the primary jets J 4 do not hit the rear surface 13 of the bowl 1. A primary direction J 4 is oblique with respect to the axis X 1 it does not intersect. The primary jets J 4 together generate a swirling air flow, or vortex air, capable of influencing the shape of the coating product jet. The components A 4 and O 4 of a primary air jet J4 are determined so that this jet flows at a radial distance ℓ 4 from the edge 12 of 1.5 mm. In practice, the distance ℓ 4 can be between 0 mm and 25 mm. The distance ℓ 4 depends in particular on the axial distance L 1 . Thus, when the distance L 1 is 50 mm, the distance ℓ 4 can be between 0 and 50 mm.

Chaque jet d'air secondaire est incliné par rapport à l'axe de rotation X1 selon une direction secondaire J6 présentant une composante axiale A6 et une composante radiale R6. De plus, les composantes A6 et R6 sont déterminées de sorte qu'un jet d'air secondaire J6 vienne frapper la surface arrière 13 du bol 1, comme cela ressort clairement de la figure 2.Each secondary air jet is inclined relative to the axis of rotation X 1 in a secondary direction J 6 having an axial component A 6 and a radial component R 6 . In addition, the components A 6 and R 6 are determined so that a jet of secondary air J 6 impinges on the rear surface 13 of the bowl 1, as is clearly apparent from the figure 2 .

En d'autres termes, la direction secondaire J6 est transversale à l'axe de rotation X1. De plus, la direction secondaire J6 présente ici une composante orthoradiale nulle, si bien qu'elle peut être assimilée à une génératrice d'un cône dont le sommet appartient à l'axe X1.In other words, the secondary direction J 6 is transverse to the axis of rotation X 1 . In addition, the secondary direction J 6 here has a zero orthoradial component, so that it can be likened to a generator of a cone whose vertex belongs to the axis X 1 .

Le jet d'air secondaire J6 illustré par la figure 2 frappe la surface arrière 13 au niveau d'une zone 136, puis s'étale sur la partie de la surface 13 située en aval de la zone 136 jusqu'à l'arête 12 et au-delà selon la direction axiale X1. Cela permet de générer un flux d'air secondaire en forme de nappe relativement uniforme et apte à régler la forme du jet de produit, donc à en modifier la surface d'impact sur l'objet à revêtir. La zone 136 est située en amont de l'arête 12 à une distance axiale L136 valant ici 28 mm. En pratique, la distance L136 peut être comprise entre 0 mm et 10 mm.The secondary air jet J 6 illustrated by the figure 2 strikes the rear surface 13 at a zone 136, then spreads on the portion of the surface 13 located downstream of the zone 136 to the edge 12 and beyond in the axial direction X 1 . This makes it possible to generate a secondary air stream in the form of a relatively uniform sheet and able to adjust the shape of the jet of product, thus modifying the impact surface on the object to be coated. The zone 136 is located upstream of the edge 12 at an axial distance L 136 of 28 mm here. In practice, the distance L 136 can be between 0 mm and 10 mm.

Le diamètre D du cercle C, qui dépend notamment du diamètre de l'arête 12, vaut ici 68 mm pour un bol 1 de diamètre égal à 55 mm. En pratique, il peut être compris entre 58 mm et 80 mm pour un tel bol.The diameter D of the circle C, which depends in particular on the diameter of the edge 12, is here 68 mm for a bowl 1 of diameter equal to 55 mm. In practice, it may be between 58 mm and 80 mm for such a bowl.

Sur le cercle C, les orifices primaires 4 sont agencés en alternance avec les orifices secondaires 6. Comme le montre la figure 3, les orifices primaires 4 et secondaires 6 sont répartis uniformément sur le cercle C, si bien que deux orifices primaires 4 successifs ou deux orifices secondaires 6 successifs sont écartés d'un même angle β valant 12°. En pratique, cet angle β peut être compris entre 6° et 24°. De plus, un orifice primaire 4 et un orifice secondaire 6 voisins sont écartés d'un angle α valant 6°, c'est-à-dire la moitié de l'angle β séparant par exemple deux orifices primaires 4 successifs. En pratique, l'écart angulaire α entre un orifice primaire 4 et un orifice secondaire 6 peut être compris entre 3° et 12°.On the circle C, the primary orifices 4 are arranged alternately with the secondary orifices 6. As shown in FIG. figure 3 the primary and secondary orifices 4 and 6 are distributed uniformly over the circle C, so that two successive primary orifices 4 or two successive secondary orifices 6 are spaced apart by the same angle β equal to 12 °. In practice, this angle β can be between 6 ° and 24 °. In addition, a primary orifice 4 and a neighboring secondary orifice 6 are spaced apart by an angle α equal to 6 °, that is to say half the angle β separating, for example, two successive primary orifices 4. In practice, the angular difference α between a primary orifice 4 and a secondary orifice 6 may be between 3 ° and 12 °.

Le nombre et la répartition des orifices primaires 4 et secondaires 6 est déterminé en fonction de la précision recherchée pour le contrôle de la forme du jet de produit et de la régularité souhaitée pour la surface d'impact. Ainsi, plus les orifices 4 et 6 sont nombreux, plus la surface d'impact est régulière. En variante, on peut prévoir des orifices primaires et des orifices secondaires en nombres différents.The number and the distribution of the primary and secondary orifices 6 is determined according to the precision sought for the control of the shape of the product jet and the desired regularity for the impact surface. Thus, the more numerous the orifices 4 and 6, the more the impact surface is regular. Alternatively, there may be primary orifices and secondary orifices in different numbers.

Les orifices primaires 4 et secondaires 6 ont des diamètres respectifs d4 et d6 valant 0,8 mm et 0,8 mm. De telles dimensions permettent d'émettre des jets d'air primaire et secondaires avec des débits valant respectivement 700 L/min et 500 L/min, lorsqu'ils sont alimentés sous des pressions respectives de 6 bars et de 6 bars. En pratique, les diamètres d4 et d6 des orifices primaires 4 et secondaires 6 peuvent être respectivement compris entre 0,5 mm et 1,5 mm et entre 0,5 mm et 1,5 mm. En particulier, les diamètres d4 et d6 peuvent être différents l'un de l'autre.The primary and secondary orifices 4 have respective diameters d 4 and d 6 of 0.8 mm and 0.8 mm. Such dimensions make it possible to emit primary and secondary air jets with flow rates of 700 L / min and 500 L / min respectively, when they are fed at pressures of 6 bars and 6 bars, respectively. In practice, the diameters d 4 and d 6 of the primary and secondary orifices 4 and 6 may respectively be between 0.5 mm and 1.5 mm and between 0.5 mm and 1.5 mm. In particular, the diameters d 4 and d 6 may be different from each other.

Comme le montre la figure 4, les canaux primaires 40 et secondaires 60 s'étendent de façon rectiligne à travers une chemise externe 22 qui prolonge un capot 20 définissant l'enveloppe externe du corps 2. Les canaux 40 et 60 sont réalisés au moyen d'opérations de perçage selon les angles appropriés. Les canaux primaires 40 sont reliés en amont, à une chambre primaire 23 qui leur est commune et qui est elle-même reliée à une source d'air comprimé non représentée. De même, les canaux secondaires 60 sont reliés à une chambre secondaire 25 qui leur est commune et qui est reliée à une source d'air comprimé non représentée et indépendante de la source alimentant les canaux primaires 40.As shown in figure 4 , the primary and secondary channels 40 extend rectilinearly through an outer jacket 22 which extends a cap 20 defining the outer casing of the body 2. The channels 40 and 60 are made by means of drilling operations according to the appropriate angles. The primary channels 40 are connected upstream to a primary chamber 23 which is common to them and which is itself connected to a source of compressed air not shown. Similarly, the secondary channels 60 are connected to a secondary chamber 25 which is common to them and which is connected to a source of compressed air not shown and independent of the source supplying the primary channels 40.

Les chambres primaire 23 et secondaire 25 sont ici formées entre la chemise externe 22 et une chemise interne 24, et elles sont séparées par un joint torique d'étanchéité 26. L'adjectif interne désigne ici un objet proche de l'axe de rotation X1, tandis que l'adjectif externe désigne un objet qui en est plus éloigné. Les chemises 22 et 24 présentent globalement une symétrie de révolution autour de l'axe X1.The primary and secondary chambers 23 are here formed between the outer jacket 22 and an inner liner 24, and they are separated by an O-ring seal 26. The internal adjective here means an object close to the axis of rotation X 1 , while the external adjective refers to an object that is further away. The shirts 22 and 24 generally have a symmetry of revolution about the axis X 1 .

Alternativement, les canaux primaires 40 et/ou secondaires 60 peuvent être définis par des interstices formés entre les chemises externe 22 et interne 24. Ces interstices peuvent dans ce cas être réalisés par usinage de crantages sur l'une et/ou l'autre des surfaces en regard des chemises interne 24 et externe 22.Alternatively, the primary channels 40 and / or secondary 60 may be defined by interstices formed between the outer jack 22 and inner 24. These interstices can in this case be made by machining notches on one and / or the other of facing surfaces of the inner and outer sleeves 24 and 22.

La figure 5 illustre une variante du projecteur rotatif des figures 1 à 4 dans laquelle les références numériques sont incrémentées de 100 pour désigner des objets semblables à ceux des figures 1 à 4.The figure 5 illustrates a variant of the rotating projector of Figures 1 to 4 in which the numerical references are incremented by 100 to designate objects similar to those of Figures 1 to 4 .

Ce projecteur rotatif pour la projection de produit de revêtement comporte un bol 101 analogue au bol 1 et logé partiellement au sein d'un corps 102 fixe. Le bol 101 peut être entraîné en rotation à haute vitesse autour d'un axe X101 et il est alimenté en produit via un distributeur 103.This rotating projector for projecting coating product comprises a bowl 101 similar to the bowl 1 and housed partially within a body 102 fixed. The bowl 101 can be rotated at high speed around an axis X 101 and is supplied with product via a distributor 103.

Le bol 101 comporte une surface de répartition 111 sur laquelle le produit de revêtement s'étale jusqu'à une arête de pulvérisation 112 où il est micronisé en fines gouttelettes.The bowl 101 has a distribution surface 111 on which the coating product spreads to a spray edge 112 where it is micronized into fine droplets.

Le corps 102 présente des orifices primaires 104, secondaires 106 et tertiaires 108 disposés respectivement sur des contours primaire C104, secondaire C106 et tertiaire C108. Les contours C104, C106 et C108 sont plans et respectivement elliptique, circulaire et rectangulaire. Les orifices 104, 106 et 108 sont destinés à émettre respectivement des jets d'air primaire, secondaire et tertiaire qui sont représentés sur la figure 5 par leurs directions respectives J104, J106 et J108.The body 102 has primary, secondary 104 and tertiary orifices 108 respectively disposed on primary C 104 , secondary C 106 and tertiary C 108 primary contours. The contours C 104 , C 106 and C 108 are planar and respectively elliptical, circular and rectangular. The orifices 104, 106 and 108 are intended to emit respectively primary, secondary and tertiary air jets which are represented on the figure 5 by their respective directions J 104 , J 106 and J 108 .

Les contours primaire C104 et tertiaire C108 sont centrés sur l'axe de rotation X101 et ils présentent des formes, respectivement elliptique et rectangulaire aux coins arrondis, qui sont allongées selon la même direction principale. Ainsi, les jets d'air primaire J104 et tertiaire J108 permettent de conformer le jet de produit pulvérisé en l'aplatissant. Cela permet d'optimiser le recouvrement des impacts sur l'objet à revêtir et, par conséquent, l'uniformité de l'épaisseur déposée.The primary C 104 and tertiary C 108 contours are centered on the axis of rotation X 101 and have shapes, respectively elliptical and rectangular with rounded corners, which are elongated along the same main direction. Thus, the jets of primary air J 104 and tertiary J 108 make it possible to conform the jet of sprayed product by flattening it. This makes it possible to optimize the recovery of the impacts on the object to be coated and, consequently, the uniformity of the deposited thickness.

De plus, pour chaque contour C104, C106 ou C108, les orifices 104, 106 ou 108 sont associés en quatre sous-groupes d'orifices de façon à former quatre quadrants I, II, III et IV. Les orifices d'un même sous-groupe délimité par un quadrant sont juxtaposés de proche en proche, c'est-à-dire qu'ils forment une séquence ininterrompue.In addition, for each contour C 104 , C 106 or C 108 , the orifices 104, 106 or 108 are associated in four subgroups of orifices so as to form four quadrants I, II, III and IV. The orifices of the same subgroup delimited by a quadrant are juxtaposed step by step, that is to say that they form an uninterrupted sequence.

Chaque sous-groupe est relié à une source indépendante d'alimentation en air comprimé par l'intermédiaire d'une vanne non représentée. Les quatre vannes des quatre sous-groupes d'un même contour sont indépendantes les unes des autres, si bien que l'on peut moduler la forme des jets d'air primaire, secondaire et tertiaire. Pour cela, on peut alimenter en air comprimé les orifices de certains quadrants sans alimenter ceux des quadrants restants.Each subgroup is connected to an independent source of compressed air supply through a valve not shown. The four valves of the four subgroups of the same contour are independent of each other, so that the shape of the primary, secondary and tertiary air jets can be modulated. For this, it is possible to supply compressed air to the orifices of certain quadrants without supplying those of the remaining quadrants.

Si besoin, la division des sous-groupes peut être réalisée autrement que par quadrants.If necessary, the division of the subgroups can be done other than by quadrants.

Par ailleurs, dans les modes de réalisation des figures 1 à 4 et 5, les directions J6 ou J106 des jets d'air secondaire peuvent être plus ou moins inclinées selon la direction radiale, de façon à frapper le bol à une distance L136 de l'arête variable d'un orifice à l'autre.Moreover, in the embodiments of Figures 1 to 4 and 5 the directions J 6 or J 106 of the secondary air jets may be more or less inclined in the radial direction, so as to hit the bowl at a distance L 136 of the variable edge of an orifice to another.

Les caractéristiques des modes de réalisation décrits ci-dessus peuvent être combinées. Par exemple, le contrôle des jets d'air du projecteur des figures 1 à 4 peut être réalisé par quadrant.The features of the embodiments described above can be combined. For example, controlling the air jets of the projector Figures 1 to 4 can be achieved by quadrant.

Claims (13)

  1. A rotary sprayer for spraying a coating material, the sprayer comprising:
    · a material sprayer member (1) presenting at least one sprayer edge (12) suitable for forming a jet of material;
    · means for driving said member (1) in rotation; and
    · a stationary body (2) presenting primary orifices (4) disposed on a primary contour (C4; C104) surrounding the axis of rotation (X1) of said member (1), and secondary orifices (6) disposed on a secondary contour (C6; C106) surrounding the axis of rotation (X1; X101) of said member (1; 101) in a manner that is offset relative to the primary orifices (4), the primary and secondary orifices (4, 6) serving respectively to emit primary and secondary air jets (J4, J6), each primary air jet being inclined relative to the axis of rotation (X1) in a primary direction (J4) presenting at least an axial component (A4) and a circumferential component (O4), such that said primary air jet (J4) freely crosses the region where the edge (12) is located, each secondary air jet being inclined relative to the axis of rotation (X1) in a secondary direction (J6) presenting at least an axial component (A6) and a radial component (R6), the primary and secondary contours (C4, C6) coinciding with a circle (C) centered on the axis of rotation (X1),
    characterized in that the components (A6, R6) of each secondary air jet (J6) are such that said secondary air jet (J6) strikes an outside surface (13) of the sprayer member (1).
  2. A rotary sprayer according to claim 1, characterized in that the body (102) also presents tertiary orifices (108) disposed on a tertiary outline (C108) surrounding the axis of rotation (X101) and designed to emit tertiary air jets, each tertiary air jet being inclined relative to the axis of rotation (X101) in a tertiary direction (J108) presenting axial, radial, and circumferential components such that said tertiary air jets (J108) freely crosses the region where the edge (12) is located.
  3. A rotary sprayer according to claim 1 or 2, characterized in that at least one of the contours (C4, C6; C104, C106, C108) presents a shape that is regular and non-circular, e.g. elliptical or rectangular.
  4. A rotary sprayer according to one of claims 1 to 3, characterized in that the orifices (4, 6; 104, 106, 108) disposed on each contour (C4, C6; C104, C106, C108) are associated in subgroups of orifices (I, II, III, IV) that are juxtaposed from one to the next, each of the subgroups (I, II, III, IV) being connected to an independent compressed air feed source via a valve, the valves being controllable independently of one another.
  5. A rotary sprayer according to one of the previous claims, characterized in that the secondary direction (J6) presents a zero circumferential component.
  6. A rotary sprayer according to one of the previous claims, characterized in that the body (2) presents primary and secondary channels (40, 60) opening out respectively via the primary and secondary orifices (4, 6), the primary and secondary channels (40, 60) being inclined relative to the axis of rotation (X1; X101) respectively along the primary and secondary directions (J4, J6).
  7. A rotary sprayer according to claim 6, characterized in that the primary and secondary channels (40, 60) are made by drilling through an outer jacket (22) and/or are constituted by gaps formed between the outer jacket (22) and an inner jacket (24), the jackets (22, 24) being disposed around means for driving the member (1) in rotation and a rear portion of the member (1).
  8. A rotary sprayer according to claim 6 or 7, characterized in that the primary and secondary channels (40, 60) are connected respectively to a primary common chamber (23) and to a secondary common chamber (25), said chambers (23, 25) being defined in the body (2) and constituting two independent compressed air feed sources.
  9. A rotary sprayer according to one of the previous claims, characterized in that the primary orifices (4) are arranged on the circle (C) in alternation with the secondary orifices (6).
  10. A rotary sprayer according to one of the previous claims, characterized in that the components (A4, O4) of the primary air jet (J4) are determined in such a manner that the primary air jets (J4) flow at a radial distance (ℓ4) from the edge (12) lying in the range 0 to 25 mm, and that is preferably equal to 1.5 mm.
  11. A rotary sprayer according to one of the previous claims, characterized in that the components (A6, R6) of the secondary air jets (J6) are determined in such a manner that the secondary air jets (J6) strike the member (1) at an axial distance (L136) from the edge (12) that lies in the range 0 to 10 mm, and that is preferably equal to 2.8 mm.
  12. A rotary sprayer according to one of the previous claims, characterized in that the circle (C) on which the primary and secondary orifices (4, 6) are disposed has a diameter (D) lying in the range 58 mm to 80 mm, and preferably equal to 68 mm, for a bowl having a diameter equal to 55 mm.
  13. An installation for spraying a coating material, characterized in that it includes at least one rotary sprayer according to one of the preceding claims.
EP08826448.6A 2007-06-13 2008-06-12 Rotary atomizer for coating product and device including such atomizer Active EP2164644B1 (en)

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Applications Claiming Priority (2)

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FR0704217A FR2917309B1 (en) 2007-06-13 2007-06-13 ROTATING PROJECTOR OF COATING PRODUCT AND INSTALLATION COMPRISING SUCH A PROJECTOR.
PCT/FR2008/000813 WO2009010646A1 (en) 2007-06-13 2008-06-12 Rotary projector for coating product and equipment including such projector

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JP (2) JP2010528854A (en)
CN (1) CN101707924B (en)
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ES2558154T3 (en) 2016-02-02
BRPI0812957A8 (en) 2017-10-03
BRPI0812957B1 (en) 2019-10-29
US20100192848A1 (en) 2010-08-05
US9314806B2 (en) 2016-04-19
JP2010528854A (en) 2010-08-26
BRPI0812957A2 (en) 2014-12-09
CN101707924B (en) 2014-11-05
JP2014133232A (en) 2014-07-24
JP5865406B2 (en) 2016-02-17
PL2164644T3 (en) 2016-06-30
CN101707924A (en) 2010-05-12
RU2010100884A (en) 2011-07-20
FR2917309B1 (en) 2013-10-25
RU2434689C2 (en) 2011-11-27
WO2009010646A1 (en) 2009-01-22
FR2917309A1 (en) 2008-12-19
EP2164644A1 (en) 2010-03-24

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