EP2142307A1 - Spraying member, spraying device comprising such a member and spraying installation comprising such a device - Google Patents

Spraying member, spraying device comprising such a member and spraying installation comprising such a device

Info

Publication number
EP2142307A1
EP2142307A1 EP08805487A EP08805487A EP2142307A1 EP 2142307 A1 EP2142307 A1 EP 2142307A1 EP 08805487 A EP08805487 A EP 08805487A EP 08805487 A EP08805487 A EP 08805487A EP 2142307 A1 EP2142307 A1 EP 2142307A1
Authority
EP
European Patent Office
Prior art keywords
spraying
spray
channels
product
coating product
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP08805487A
Other languages
German (de)
French (fr)
Other versions
EP2142307B1 (en
Inventor
Patrick Ballu
Philippe Foury
Djamel Merabet
Philippe Provenaz
Eric Prus
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.)
Sames Kremlin SAS
Original Assignee
Sames Technologies SAS
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 Sames Technologies SAS filed Critical Sames Technologies SAS
Priority to PL08805487T priority Critical patent/PL2142307T3/en
Publication of EP2142307A1 publication Critical patent/EP2142307A1/en
Application granted granted Critical
Publication of EP2142307B1 publication Critical patent/EP2142307B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • 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
    • B05B3/1007—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 characterised by the rotating member
    • B05B3/1014—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 characterised by the rotating member with a spraying edge, e.g. like a cup or a bell
    • 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
    • B05B3/1007—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 characterised by the rotating member
    • 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
    • B05B3/1064—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 the liquid or other fluent material to be sprayed being axially supplied to the rotating member through a hollow rotating shaft
    • 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
    • B05B3/1071—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 with two rotating members rotating at different speeds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
    • B05B5/0403—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces characterised by the rotating member
    • B05B5/0407—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces characterised by the rotating member with a spraying edge, e.g. like a cup or a bell

Definitions

  • the present invention relates to a spraying member and a rotary coating product projection device comprising such a spraying member, and a coating product spraying installation comprising such a device.
  • Conventional spraying by means of rotary devices is used to apply to objects to be coated, such as motor vehicle bodies, a primer, a base coat and / or a varnish with a coating product flow of between 100 and 500 cm 3 / min.
  • objects to be coated such as motor vehicle bodies, a primer, a base coat and / or a varnish with a coating product flow of between 100 and 500 cm 3 / min.
  • Paint projection devices to be mounted on these robots must therefore be capable of spraying coating products with high flow rates.
  • Rotating projectors equipped with large diameter spraying devices are known from the prior art, which make it possible to spray the coating product into finer droplets and which are therefore capable of spraying the coating products with higher flow rates.
  • the control of the jet of sprayed product becomes difficult, which can degrade the quality of the coating and the deposition efficiency.
  • F-1 335 550 proposes, in connection with Figure 15, to increase the flow of coating product by employing a rotary device equipped with a spray member comprising a plurality of spray edges.
  • Such a spraying member makes it possible to increase the useful length of spraying while maintaining a relatively compact construction radially, so easy to rotate.
  • Such an organ makes it possible to spray high flows of coating product.
  • the product distribution surfaces define edges of substantially identical diameter and have, in a plane of symmetry such as that of Figure 15, parallel directions, or convergent. The jets of product sprayed by these different edges are thus confluent, so that the droplets that compose them present a significant risk of recombination.
  • the spray member described by FR-A-1335550 may therefore form droplets of heterogeneous dimensions, which degrades the quality of the coating.
  • SU-A-733,565 discloses a spraying member for a liquid product spraying device.
  • This spraying member comprises three spray edges whose diameters are identical. It therefore has a low axial compactness and a relatively high risk of recombination of the sprayed droplets.
  • the invention more particularly intends to remedy by proposing a spraying member comprising at least two divergent surfaces for spraying the product.
  • the subject of the invention is a spraying member for a coating product spraying device, said spraying member comprising a primary surface for distributing the product and at least two secondary surfaces, inside and outside of the distribution of the product. product extending downstream from the primary surface, the primary and secondary surfaces being coaxial, the downstream portions of the secondary surfaces respectively defining at least one inner spray edge and at least one outer spray edge, the downstream portions of the secondary surfaces having one with respect to the other of the generally divergent directions downstream, characterized in that the inner edge has a diameter substantially smaller than the diameter of the outer edge.
  • the coating product is first distributed on the primary surface of the atomizer member, then it is distributed on divergent secondary surfaces downstream of which it is sprayed by the edges of different diameters, thus forming divergent jets, which avoids the recombination of the droplets.
  • the droplets of sprayed product can therefore have homogeneous dimensions and thus achieve a quality coating on the object to be coated.
  • the spraying member has an axial compactness which facilitates its handling.
  • such a spraying member may incorporate one or more of the following features: the outer edge is axially recessed upstream with respect to the inner edge;
  • the member further comprises distribution channels of the coating product each extending between an inlet located on an upstream portion of the inner secondary surface and an outlet facing an upstream portion of the outer secondary surface; the outlets being arranged on a ring coaxial with the edges;
  • the member furthermore comprises orifices each extending between an inlet situated on the external surface of the spraying member and an outlet located on an upstream portion of the outer secondary surface, the inlets and outlets being arranged on a ring coaxial with the edges;
  • the channels and holes consist of cylindrical holes whose outputs are distributed alternately at the upstream portion of the outer secondary surface; the channels and / or the orifices have different diameters;
  • the channels and the orifices are in different numbers
  • the secondary surfaces are frustoconical; - The secondary surfaces form between them and in a plane of symmetry of the spray member an angle between 16 ° and 24 °, preferably 20 °;
  • the outer secondary surface has a length greater than 5 mm, preferably 10 mm; - the secondary surfaces are left;
  • the member is in one piece, the secondary and primary surfaces being defined by the same piece;
  • the body is composed of a body defining the primary surface and one of the secondary surfaces and a part secured to the body and defining the other secondary surface.
  • the invention relates to a rotary device for projecting a coating product comprising a spraying member, means for driving this member in rotation and means for supplying this member with a coating product, this spraying member. being as previously stated.
  • the invention relates to a coating product spraying installation comprising at least one rotary coating product projection device as previously discussed.
  • FIG. 1 is a longitudinal sectional view of a coating product projector according to the invention used in an installation according to the invention and incorporating a spray member according to the invention;
  • FIG. 2 is an axial section on a larger scale of the spray member of Figure 1;
  • FIG. 3 is a partial section showing detail III in FIG. 2;
  • FIG. 4 is a partial section of the spray member of Figure 2 in a plane angularly offset from the sectional plane of Figure 2;
  • FIG. 5 is an axial section of a spray member according to a second embodiment of the invention.
  • the projector P shown in Figure 1 is supplied with coating material from one or more sources not shown and moved, for example with a substantially vertical movement represented by the double arrow Fi, facing O objects to be coated at within an installation I coating these objects.
  • the projector P comprises an air turbine whose rotor 1 is visible in Figure 1, the rotor 1 being rotated about an axis Xi-X'i.
  • An annular support 4 of magnetic material for example stainless steel magnetic, is mounted on the front face 42 of the body 2, the support 4 being provided with an annular groove centered on the axis Xi-X'i and in which is disposed an annular magnet 41.
  • An injector 5 coating product is housed in the center of the body 2, co-axially to the axis Xi-XV
  • a spraying member 10 is mounted on the headlight P and its upstream portion forms a male frustoconical surface 12 intended to cooperate with a female frustoconical surface 11 of the rotor 1 to fasten the spraying member 10 in rotation with the rotor 1.
  • effective support surfaces 12 and 11 against each other and a rotating immobilization in the manner of a Morse cone a ring 13 of ferromagnetic material is mounted on the spraying member 10, so that a attraction force F 2 due to the magnet 41 is exerted on the ring 13.
  • the surfaces 11 and 12 are thus firmly pressed against each other, while an air gap E is formed between the ring 13 and support 4.
  • the application of technical teaching FR-A-2 887 472 is applied here.
  • the spraying member 10 has the shape of a bowl with two spray edges. Its median part forms a primary surface 20 for distributing the coating product coming from the injector 5 via a distributor 7 extending facing the upstream portion 25 of the primary surface 20.
  • the terms upstream and downstream refer to the flow direction of the product from the injector 5 to the object O to be coated.
  • each of the secondary surfaces 21 and 22 respectively define an inner edge 23 and an outer edge 24, on which the coating product is sprayed when the member 10 is rotated.
  • the edges 23 and 24 are formed by the respective downstream ends of the secondary surfaces 21 and 22.
  • the primary 20 and secondary surfaces 21 and 22 of the member 10 all have a symmetry of revolution about the axis Xio-X ' 1 0 which coincides with the axis Xi-X'i, when the member 10 is mounted on the rotor 1. These surfaces are therefore co-axial and the edges 23 and 24 in the form of a circle whose centers belong to the axis X 10 -X 1 I0 . In practice, the edges 23 and 24 may have small reliefs or "notches" to better spray the coating product.
  • the primary and secondary surfaces 21 and 22 each have the shape of a truncated cone with a circular base and axis Xio-X'i. In the radial plane of FIG.
  • the profile of the primary surface 20 forms a angle A 2 o of about 32 ° with the axis X 1o -X'io-
  • the profile of the inner secondary surface 21 forms an angle A 2 i of about 27 ° with the X-axis X-X '10
  • the profile of the outer secondary surface 22 forms an angle A 22 of approximately 45 ° with the axis Xio-X'io-
  • the secondary surfaces 21 and 22, and more particularly their respective downstream portions 21b and 22b are inclined relative to each other by an angle A 22 -A 2I of 20 ° and they have divergent directions downstream, that is to say towards their edges 23 and 24.
  • satisfactory results can be obtained when the secondary surfaces 21 and 22 form, between them and in a plane of symmetry of the member 10, an angle of between 16 ° and 24 °.
  • the secondary surfaces 21 and 22 define circular ridges 23 and 24 having substantially different diameters D 23 and D 24 .
  • the diameter D 23 may be 54 mm, while the diameter D 24 may be about 64 mm.
  • the diameter D 23 of the inner edge 23 is substantially smaller than the diameter D 24 of the outer edge 24.
  • the divergence of the surfaces 21 and 22 makes it possible to avoid as much as possible that the jets of product sprayed respectively by the inner and outer edges 23 and 24.
  • the term "recombinant" refers here to the mixing of the jets with each other, which poses both a problem of a Vogellic disturbances and a problem of confluence of the droplets.
  • the construction of the member 10 according to the invention thus makes it possible to avoid or limit the recombination of the jets, which would result in particular in increasing the size of the product droplets.
  • the difference between the diameters D 23 and D 24 makes it possible to ensure good separation of the jets of sprayed product without axially lengthening the member 10 excessively.
  • this axial compactness of the member 10 allows for example a multi-axis robot to easily manipulate a rotating projector which is equipped around and in the objects O to be coated.
  • the edges 23 and 24 are not in the same plane, but offset axially with respect to each other, the outer edge 24 being set back by a non-zero distance di upstream with respect to the Inner edge 23.
  • the distance di of withdrawal of the edge 24 with respect to the edge 23, visible in FIG. 3, can be 1 mm.
  • the distance di is greater than 1% of the diameter D 23 of the inner edge 23. The greater the shrinkage di, the less jets of sprayed product may recombine.
  • the secondary surfaces 21 and 22 are made in the same room as the primary surface 20.
  • the member 10 is therefore one-piece, which makes it possible to obtain a good balance in rotation , to the extent that its machining is carried out with precision.
  • the member 10 further comprises channels 40 for dispensing the coating product which each extend between an inlet 40a located on an upstream portion 21a of the inner secondary surface 21 and an outlet 40b facing an upstream portion 22a of the In fact, the inlet 40a of a channel 40 is at the joint of the downstream portion of the primary surface 20 and the upstream portion 21a of the inner secondary surface 21.
  • the inputs 40a of all the channels 40 are arranged on a ring of frustoconical shape and coaxial with the secondary surface 21 and thus at its edge 23.
  • the outlets 40b are arranged on a ring of frustoconical shape and coaxial with the secondary surface. 22 and therefore at its edge 24.
  • the channels 40 consist of cylindrical holes made in a flange 26 of the member 10 forming the inner secondary surface 21.
  • the channels 40 have for example a diameter of 1 mm and extend in an oblique direction forming an angle A 40 with Xio-X'io axis in a radial plane, that is to say in a plane of symmetry of the member 10. In the plane of Figure 3, the angle A 40 is about 45 °.
  • the centers of the inputs 40a are situated at a distance d 4 o from the ridge 23 of, for example, 10 mm.
  • the channels 40 have the function of distributing the coating product from the primary surface 20 to the outer secondary surface 22. To achieve uniform distribution, the channels 40 are regularly distributed around the Xio-X'i axis. coating material which does not flow into the channels 40 passes between these channels and reaches the inner secondary surface 21. The partition of the coating product between the secondary surfaces 21 and 22 therefore occurs at the joint between the primary surface 20 and the secondary surface 21, that is to say at the upstream portion 21a of the latter. The position and the orientation of the channels 40 are determined by the passage of the tool of piercing between the wings 26 and 27. The channels 40 are drilled so as to tangential as much as possible the outer secondary surface 22, which facilitates the cleaning of this surface and reduces its wear by the coating product.
  • the member 10 also comprises orifices 50 which each extend between an inlet 50a located on the outer surface 101 of the member 10 and an outlet 50b located on an upstream portion 22A of the secondary surface 22.
  • the orifices 50 are made by a cylindrical drilling operation performed in a flange 27 which defines the secondary surface 22.
  • Each orifice 50 is here rectilinear and extends along an axis contained in a radial plane. It has a diameter equivalent to the diameter of the channels 40, for example 1 mm, and their inlet 50a or their outlet 50b are arranged on a ring coaxial with the edges 23 and 24.
  • the orifices 50 are oblique and form an angle A 50 of about 25 ° with the axis Xio-X'10.
  • channels 40 and / or orifices 50 having different diameters can be provided.
  • the orifices 50 induce a flow of air on the outer side of the flange 26 forming the inner secondary surface 21, when the member 10 is rotating. Such an air flow makes it possible to fill the depression created between the ridges 24 and 23 and thus to prevent the return of droplets sprayed by the inner edge 23 into the volume situated between the wings 26 and 27. Moreover, this flow of air allows to create an induced air skirt flanking the jet sprayed by the inner edge 23, which prevents the recombination of the latter with the jet sprayed by the edge 24.
  • the orifices 50 are distributed regularly around the axis Xio-X'i-Ns therefore open at the upstream portion of the outer secondary surface 22 alternately with the channels 40. In other words, the orifices 50 and the channels 40 are the same number and they are arranged alternately. However, it is possible to provide channels 40 and orifices 50 in different numbers and / or with a less regular distribution.
  • the member 10 rotates about its Xio-X'i axis at a very high speed, typically between 30,000 and 70,000 rpm.
  • the coating product such as a liquid paint
  • the coating product is supplied by the injector 5 and it bursts against the upstream face of the distributor 7, before distributing and spreading on the primary surface 20. Downstream of the primary surface 20, the paint is distributed and spread over the secondary surface 21 until reaching the spraying edge 23 where it splits into fine droplets.
  • the length L must be greater than 5 mm and preferably 10 mm.
  • the partitioning of the paint between the inner 23 and outer 24 edges depends on the product flow and on the speed of rotation of the member 10. These parameters can be chosen to perform a share of about 50% for each of the edges.
  • the paint can also be divided by 30% for the inner edge 23 and 70% for the outer edge 24, depending on the operating parameters adopted as a function of the desired application.
  • a notched annular zone 60 may be formed on the primary surface 20 so as to set in motion all the layers of the paint film which is spread there at the same tangential speed as the channels 40. This makes it possible to promote the passage of the paint in the channels 40 and ensure that the flow remains constant on each edge 23 and 24 for a given rotation speed of the member 10.
  • the notches of the zone 60 may be 2.5 mm long, 0.15 mm deep and spaced with a pitch of 0.3 mm.
  • FIG. 5 illustrates a second embodiment of a spraying member according to the invention. Similar elements bear the same references as in the previous figures, increased by 100.
  • the member 110 illustrated in Figure 5 differs from the body 10 by its structure and by the shape of its primary and secondary surfaces.
  • the internal 121 and outer secondary surfaces 122 are here left surfaces resembling paraboloids of revolution about an axis X-no-X'no-
  • the primary surface 120 has a shape similar to a paraboloid of revolution.
  • left surface is meant a non-straight surface, that is to say a curved or concave profile surface with respect to the bowl 131.
  • the downstream portions 121b and 122b of the secondary surfaces 121 and 122 respectively form, with respect to the central axis Xno-X'no, mean angles A 12 1 and A1 22 which define directions globally divergent downstream, that is to say toward the object O to be coated.
  • the average angle of a downstream portion whose profile is not rectilinear, can be evaluated as the average of the angles formed by the tangents at each point of this profile with the central axis. In practice, it suffices to average the angles formed by a few tangents, for example four, regularly distributed along the profile of the downstream portion.
  • the directions defined by the angles A 121 and A122 of the downstream portions 121b and 122b of the secondary surfaces 121 and 122 are divergent and they form between them an angle of about 10 °. As in the first embodiment, this makes it possible to avoid the recombination of the jets sprayed by the inner 123 and outer edges 124.
  • the member 110 here consists of a main bowl 131 in which are drilled the channels 140 prior to the joining, for example by hooping, a ring 132 for forming the outer secondary surface 122. Orifices similar to ports 50 may be made by drilling into the member 110 to perform similar functions.
  • the invention has been shown in Figures 1 and 2 with a spraying member attached to the rotor by magnetic effect.
  • the spraying member may be fixed by any other means and it may in particular be screwed by means of a thread 14, adapted to cooperate with a complementary thread formed in the rotor 1, as shown in FIG. 5 for the body 110.

Abstract

The invention relates to a member (10) for spraying a coating product comprising a primary surface (20) for spreading the product and at least two secondary, inner (21) and outer (22) surfaces for spreading the product that extend downstream of the primary surface (20), the primary (20) and secondary (21, 22) surfaces being coaxial (X10-X'10), the downstream portions of the secondary surfaces (21, 22) defining an inner spraying edge (23) and an outer spraying edge (24). The downstream portions (21b, 22b) of the secondary surfaces (21, 22) have, relative to one another, directions (A21, A22) that are overall divergent towards the downstream direction. The inner edge (23) has a diameter substantially smaller than the diameter of the outer edge (24).

Description

ORGANE DE PULVERISATION, DISPOSITIF DE PROJECTION COMPORTANT UN TEL ORGANE ET INSTALLATION DE PROJECTION SPRAYING DEVICE, PROJECTION DEVICE COMPRISING SUCH AN ORGAN, AND PROJECTION PLANT
COMPRENANT UN TEL DISPOSITIFINCLUDING SUCH A DEVICE
La présente invention concerne un organe de pulvérisation et un dispositif rotatif de projection de produit de revêtement comportant un tel organe de pulvérisation, ainsi qu'une installation de projection de produit de revêtement comprenant un tel dispositif. La pulvérisation conventionnelle au moyen de dispositifs 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 avec un débit de produit de revêtement compris entre 100 et 500 cm3/min. Afin de diminuer les coûts liés à l'installation et au fonctionnement des lignes de peinturage, le marché automobile tend à réduire leur longueur ainsi que le nombre de robots de pulvérisation équipant ces lignes. Les dispositifs de projection de peinture destinés à être montés sur ces robots doivent donc être capables de pulvériser les produits de revêtement avec des débits élevés. On connaît de l'art antérieur des projecteurs rotatifs équipés d'organes de pulvérisation de grand diamètre qui permettent de pulvériser le produit de revêtement en gouttelettes plus fines et qui sont donc capables de pulvériser les produits de revêtement avec des débits plus élevés. Cependant, il s'avère difficile d'entraîner en rotation à très grande vitesse un organe de pulvérisation de grande dimension radiale, car les performances des turbines d'entraînement rotatif existantes deviennent insuffisantes et leur consommation d'air rédhibitoire. De plus, le contrôle du jet de produit pulvérisé devient difficile, ce qui peut dégrader la qualité du revêtement et le rendement de dépôt. F R-A- 1 335 550 propose, en relation avec sa figure 15, d'augmenter le débit de produit de revêtement en employant un dispositif rotatif équipé d'un organe de pulvérisation comprenant plusieurs arêtes de pulvérisation. Un tel organe de pulvérisation permet d'augmenter la longueur utile de pulvérisation tout en conservant une construction relativement compacte radialement, donc facile à entraîner en rotation. Un tel organe permet de pulvériser des débits élevés de produit de revêtement. Cependant, les surfaces de répartition du produit définissent des arêtes de diamètre sensiblement identique et présentent, dans un plan de symétrie tel que celui de la figure 15, des directions parallèles, voire convergentes. Les jets de produit pulvérisé par ces différentes arêtes sont donc confluents, si bien que les gouttelettes qui les composent présentent un risque important de recombinaison. L'organe de pulvérisation décrit par FR-A-1 335 550 risque donc de former des gouttelettes de dimensions hétérogènes, ce qui dégrade la qualité du revêtement.The present invention relates to a spraying member and a rotary coating product projection device comprising such a spraying member, and a coating product spraying installation comprising such a device. Conventional spraying by means of rotary devices is used to apply to objects to be coated, such as motor vehicle bodies, a primer, a base coat and / or a varnish with a coating product flow of between 100 and 500 cm 3 / min. To reduce the costs associated with the installation and operation of painting lines, the automotive market tends to reduce their length and the number of spray robots equipping these lines. Paint projection devices to be mounted on these robots must therefore be capable of spraying coating products with high flow rates. Rotating projectors equipped with large diameter spraying devices are known from the prior art, which make it possible to spray the coating product into finer droplets and which are therefore capable of spraying the coating products with higher flow rates. However, it proves difficult to drive in rotation at a very high speed a sputtering member of large radial size, because the performance of existing rotary drive turbines become insufficient and their air consumption unacceptable. In addition, the control of the jet of sprayed product becomes difficult, which can degrade the quality of the coating and the deposition efficiency. F-1 335 550 proposes, in connection with Figure 15, to increase the flow of coating product by employing a rotary device equipped with a spray member comprising a plurality of spray edges. Such a spraying member makes it possible to increase the useful length of spraying while maintaining a relatively compact construction radially, so easy to rotate. Such an organ makes it possible to spray high flows of coating product. However, the product distribution surfaces define edges of substantially identical diameter and have, in a plane of symmetry such as that of Figure 15, parallel directions, or convergent. The jets of product sprayed by these different edges are thus confluent, so that the droplets that compose them present a significant risk of recombination. The spray member described by FR-A-1335550 may therefore form droplets of heterogeneous dimensions, which degrades the quality of the coating.
Les interférences entre les jets de produit pulvérisé sont d'autant plus préjudiciables à la qualité du revêtement que la vitesse de rotation de l'organe de pulvérisation est élevée. Il est vrai que la vitesse de rotation, donc le débit de produit, appliqués à l'organe de pulvérisation décrit par FR- A-1 335 550 ne sont pas particulièrement élevés. En effet, la figure 16 de FR-A- 1 335 550 montre un organe de pulvérisation sur lequel des bols en tôle sont fixés par des vis et espacées par des écarteurs. Or, de tels éléments induiraient d'importants problèmes d'équilibrage si l'organe de pulvérisation devait tourner aux vitesses actuelles qui peuvent dépasser 50 000 trs/min en charge.The interferences between the jets of sprayed product are all the more detrimental to the quality of the coating as the speed of rotation of the spray member is high. It is true that the rotational speed, therefore the product flow, applied to the spray member described in FR-A-1335550 are not particularly high. Indeed, Figure 16 of FR-A-1335550 shows a spray member on which sheet metal bowls are fixed by screws and spaced apart by spacers. However, such elements would induce significant balancing problems if the spraying member had to run at current speeds that can exceed 50,000 rpm under load.
SU-A-733 565 décrit un organe de pulvérisation pour un dispositif de projection de produit liquide. Cet organe de pulvérisation comporte trois arêtes de pulvérisation dont les diamètres sont identiques. Il présente donc une faible compacité axiale et un risque relativement élevé de recombinaison des gouttelettes pulvérisées.SU-A-733,565 discloses a spraying member for a liquid product spraying device. This spraying member comprises three spray edges whose diameters are identical. It therefore has a low axial compactness and a relatively high risk of recombination of the sprayed droplets.
C'est à ces inconvénients qu'entend plus particulièrement remédier l'invention en proposant un organe de pulvérisation comprenant au moins deux surfaces divergentes pour pulvériser le produit. A cet effet, l'invention a pour objet un organe de pulvérisation pour un dispositif de projection de produit de revêtement, ledit organe de pulvérisation comprenant une surface primaire de répartition du produit et au moins deux surfaces secondaires, intérieure et extérieure de répartition du produit s'étendant en aval de la surface primaire, les surfaces primaire et secondaires étant coaxiales, les portions aval des surfaces secondaires définissant respectivement au moins une arête intérieure de pulvérisation et au moins une arête extérieure de pulvérisation, les portions aval des surfaces secondaires présentant l'une par rapport à l'autre des directions globalement divergentes vers l'aval, caractérisé en ce que l'arête intérieure présente un diamètre sensiblement inférieur au diamètre de l'arête extérieure.It is these drawbacks that the invention more particularly intends to remedy by proposing a spraying member comprising at least two divergent surfaces for spraying the product. For this purpose, the subject of the invention is a spraying member for a coating product spraying device, said spraying member comprising a primary surface for distributing the product and at least two secondary surfaces, inside and outside of the distribution of the product. product extending downstream from the primary surface, the primary and secondary surfaces being coaxial, the downstream portions of the secondary surfaces respectively defining at least one inner spray edge and at least one outer spray edge, the downstream portions of the secondary surfaces having one with respect to the other of the generally divergent directions downstream, characterized in that the inner edge has a diameter substantially smaller than the diameter of the outer edge.
Grâce à l'invention, le produit de revêtement est d'abord réparti sur la surface primaire de l'organe de pulvérisation, puis il se répartit sur des surfaces secondaires divergentes en aval desquelles il est pulvérisé par les arêtes de diamètres différents, formant ainsi des jets divergents, ce qui évite la recombinaison des gouttelettes. Les gouttelettes de produit pulvérisé peuvent donc présenter des dimensions homogènes et réaliser ainsi un revêtement de qualité sur l'objet à revêtir. De plus, l'organe de pulvérisation présente une compacité axiale qui facilite sa manipulation.Thanks to the invention, the coating product is first distributed on the primary surface of the atomizer member, then it is distributed on divergent secondary surfaces downstream of which it is sprayed by the edges of different diameters, thus forming divergent jets, which avoids the recombination of the droplets. The droplets of sprayed product can therefore have homogeneous dimensions and thus achieve a quality coating on the object to be coated. In addition, the spraying member has an axial compactness which facilitates its handling.
Selon des aspects avantageux mais non obligatoires de l'invention, un tel organe de pulvérisation peut incorporer une ou plusieurs des caractéristiques suivantes : - l'arête extérieure est axialement en retrait vers l'amont par rapport à l'arête intérieure ;According to advantageous but non-compulsory aspects of the invention, such a spraying member may incorporate one or more of the following features: the outer edge is axially recessed upstream with respect to the inner edge;
- l'organe comprend en outre des canaux de distribution du produit de revêtement s'étendant chacun entre une entrée située sur une portion amont de la surface secondaire intérieure et une sortie située face à une portion amont de la surface secondaire extérieure, les entrées et les sorties étant disposées sur un anneau coaxial aux arêtes ;the member further comprises distribution channels of the coating product each extending between an inlet located on an upstream portion of the inner secondary surface and an outlet facing an upstream portion of the outer secondary surface; the outlets being arranged on a ring coaxial with the edges;
- l'organe comprend en outre des orifices s'étendant chacun entre une entrée située sur la surface externe de l'organe de pulvérisation et une sortie située sur une portion amont de la surface secondaire extérieure, les entrées et sorties étant disposées sur un anneau coaxial aux arêtes ;the member furthermore comprises orifices each extending between an inlet situated on the external surface of the spraying member and an outlet located on an upstream portion of the outer secondary surface, the inlets and outlets being arranged on a ring coaxial with the edges;
- les canaux et les orifices sont constitués de perçages cylindriques dont les sorties sont réparties de façon alternée au niveau de la portion amont de la surface secondaire extérieure ; - les canaux et/ou les orifices présentent des diamètres différents ;- The channels and holes consist of cylindrical holes whose outputs are distributed alternately at the upstream portion of the outer secondary surface; the channels and / or the orifices have different diameters;
- les canaux et les orifices sont en nombres différents ;the channels and the orifices are in different numbers;
- les surfaces secondaires sont tronconiques ; - les surfaces secondaires forment entre elles et dans un plan de symétrie de l'organe de pulvérisation un angle compris entre 16° et 24°, de préférence de 20° ;the secondary surfaces are frustoconical; - The secondary surfaces form between them and in a plane of symmetry of the spray member an angle between 16 ° and 24 °, preferably 20 °;
- la surface secondaire extérieure possède une longueur supérieure à 5 mm, de préférence à 10 mm ; - les surfaces secondaires sont gauches ;the outer secondary surface has a length greater than 5 mm, preferably 10 mm; - the secondary surfaces are left;
- l'organe est monobloc, les surfaces secondaires et primaire étant définies par une même pièce ;the member is in one piece, the secondary and primary surfaces being defined by the same piece;
- l'organe est composé d'un corps définissant la surface primaire et l'une des surfaces secondaires ainsi que d'une pièce solidarisée au corps et définissant l'autre surface secondaire.- The body is composed of a body defining the primary surface and one of the secondary surfaces and a part secured to the body and defining the other secondary surface.
Par ailleurs, l'invention concerne un dispositif rotatif de projection de produit de revêtement comportant un organe de pulvérisation, des moyens d'entraînement de cet organe en rotation et des moyens d'alimentation de cet organe en produit de revêtement, cet organe de pulvérisation étant tel que précédemment exposé.Furthermore, the invention relates to a rotary device for projecting a coating product comprising a spraying member, means for driving this member in rotation and means for supplying this member with a coating product, this spraying member. being as previously stated.
D'autre part, l'invention concerne une installation de projection de produit de revêtement comprenant au moins un dispositif rotatif de projection de produit de revêtement tel que précédemment exposé.On the other hand, the invention relates to a coating product spraying installation comprising at least one rotary coating product projection device as previously discussed.
L'invention sera bien comprise et d'autres avantages de celle-ci apparaîtront clairement à la lumière de la description qui va suivre, donnée uniquement à titre d'exemple et faite en référence aux dessins annexés dans lesquels :The invention will be well understood and other advantages thereof will become clear in the light of the following description, given solely by way of example and with reference to the accompanying drawings in which:
- la figure 1 est une coupe longitudinale de principe d'un projecteur de produit de revêtement conforme à l'invention utilisé dans une installation conforme à l'invention et incorporant un organe de pulvérisation conforme à l'invention ;- Figure 1 is a longitudinal sectional view of a coating product projector according to the invention used in an installation according to the invention and incorporating a spray member according to the invention;
- la figure 2 est une coupe axiale à plus grande échelle de l'organe de pulvérisation de la figure 1 ; - la figure 3 est une coupe partielle montrant le détail III à la figure 2 ;- Figure 2 is an axial section on a larger scale of the spray member of Figure 1; FIG. 3 is a partial section showing detail III in FIG. 2;
- la figure 4 est une coupe partielle de l'organe de pulvérisation de la figure 2 selon un plan décalé angulairement par rapport au plan de coupe de la figure 2 ;- Figure 4 is a partial section of the spray member of Figure 2 in a plane angularly offset from the sectional plane of Figure 2;
- la figure 5 est une coupe axiale d'un organe de pulvérisation conforme à un deuxième mode de réalisation de l'invention.- Figure 5 is an axial section of a spray member according to a second embodiment of the invention.
Le projecteur P représenté à la figure 1 est alimenté en produit de revêtement à partir d'une ou plusieurs sources non représentées et déplacé, par exemple avec un mouvement essentiellement vertical représenté par la double flèche Fi, en regard d'objets O à revêtir au sein d'une installation I de revêtement de ces objets. Le projecteur P comprend une turbine à air dont le rotor 1 est visible sur la figure 1, ce rotor 1 étant entraîné en rotation autour d'un axe Xi-X'i. Un corps 2, fixe par rapport à l'axe Xi-X'i, entoure le rotor 1 et se trouve lui-même isolé de l'extérieur par un capot 3. Un support annulaire 4 en matériau magnétique, par exemple en acier inox magnétique, est monté sur la face avant 42 du corps 2, ce support 4 étant pourvu d'une gorge annulaire centrée sur l'axe Xi-X'i et dans laquelle est disposé un aimant annulaire 41. Un injecteur 5 de produit de revêtement est logé au centre du corps 2, co-axialement à l'axe Xi-XVThe projector P shown in Figure 1 is supplied with coating material from one or more sources not shown and moved, for example with a substantially vertical movement represented by the double arrow Fi, facing O objects to be coated at within an installation I coating these objects. The projector P comprises an air turbine whose rotor 1 is visible in Figure 1, the rotor 1 being rotated about an axis Xi-X'i. A body 2, fixed relative to the axis Xi-X'i, surrounds the rotor 1 and is itself isolated from the outside by a cover 3. An annular support 4 of magnetic material, for example stainless steel magnetic, is mounted on the front face 42 of the body 2, the support 4 being provided with an annular groove centered on the axis Xi-X'i and in which is disposed an annular magnet 41. An injector 5 coating product is housed in the center of the body 2, co-axially to the axis Xi-XV
Un organe de pulvérisation 10 est monté sur le projecteur P et sa partie amont forme une surface tronconique mâle 12 destinée à coopérer avec une surface tronconique femelle 11 du rotor 1 pour solidariser en rotation l'organe de pulvérisation 10 avec le rotor 1. Pour garantir un appui efficace des surfaces 12 et 11 l'une contre l'autre et une immobilisation rotative à la façon d'un cône Morse, une bague 13 en matériau ferromagnétique est montée sur l'organe de pulvérisation 10, de telle sorte qu'un effort d'attraction F2 dû à l'aimant 41 s'exerce sur la bague 13. Les surfaces 11 et 12 sont ainsi fermement plaquées l'une contre l'autre, alors qu'un entrefer E est ménagé entre la bague 13 et le support 4. On fait ici application de l'enseignement technique FR-A-2 887 472. L'organe de pulvérisation 10 présente la forme d'un bol à deux arêtes de pulvérisation. Sa partie médiane forme une surface primaire 20 de répartition du produit de revêtement provenant de l'injecteur 5 par l'intermédiaire d'un distributeur 7 s'étendant en regard de la portion amont 25 de la surface primaire 20. Les termes amont et aval font référence au sens d'écoulement du produit depuis l'injecteur 5 jusque vers l'objet O à revêtir.A spraying member 10 is mounted on the headlight P and its upstream portion forms a male frustoconical surface 12 intended to cooperate with a female frustoconical surface 11 of the rotor 1 to fasten the spraying member 10 in rotation with the rotor 1. effective support surfaces 12 and 11 against each other and a rotating immobilization in the manner of a Morse cone, a ring 13 of ferromagnetic material is mounted on the spraying member 10, so that a attraction force F 2 due to the magnet 41 is exerted on the ring 13. The surfaces 11 and 12 are thus firmly pressed against each other, while an air gap E is formed between the ring 13 and support 4. The application of technical teaching FR-A-2 887 472 is applied here. The spraying member 10 has the shape of a bowl with two spray edges. Its median part forms a primary surface 20 for distributing the coating product coming from the injector 5 via a distributor 7 extending facing the upstream portion 25 of the primary surface 20. The terms upstream and downstream refer to the flow direction of the product from the injector 5 to the object O to be coated.
En aval de la surface primaire 20 s'étendent deux surfaces secondaires 21 et 22 de répartition du produit de revêtement. La surface secondaire 21 est dite intérieure, car elle est située plus près de l'axe central Xio-X'10 de l'organe 10, tandis que la surface secondaire 22 est dite extérieure, car elle en est plus éloignée. Les portions aval de chacune des surfaces secondaires 21 et 22 définissent respectivement une arête intérieure 23 et une arête extérieure 24, sur lesquelles le produit de revêtement est pulvérisé lorsque l'organe 10 est entraîné en rotation. En l'occurrence, les arêtes 23 et 24 sont formées par les extrémités aval respectives des surfaces secondaires 21 et 22.Downstream of the primary surface 20 extend two secondary surfaces 21 and 22 of distribution of the coating product. The secondary surface 21 is called inner because it is located closer to the central axis Xio-X '10 of the member 10, while the secondary surface 22 is said external because it is further away. The downstream portions of each of the secondary surfaces 21 and 22 respectively define an inner edge 23 and an outer edge 24, on which the coating product is sprayed when the member 10 is rotated. In this case, the edges 23 and 24 are formed by the respective downstream ends of the secondary surfaces 21 and 22.
Les surfaces primaire 20 et secondaires 21 et 22 de l'organe 10 présentent toutes une symétrie de révolution autour de l'axe Xio-X'10 qui est confondu avec l'axe Xi-X'i , lorsque l'organe 10 est monté sur le rotor 1 . Ces surfaces sont donc co-axiales et les arêtes 23 et 24 en forme de cercle dont les centres appartiennent à l'axe X10-X1 I0. En pratique, les arêtes 23 et 24 peuvent présenter de petits reliefs ou « crans », afin de mieux pulvériser le produit de revêtement. Les surfaces primaire 20 et secondaires 21 et 22 présentent chacune la forme d'un tronc de cône à base circulaire et d'axe Xio-X'io- Dans le plan radial de la figure 2, le profil de la surface primaire 20 forme un angle A2o d'environ 32° avec l'axe X1o-X'io- Dans le plan radial de la figure 2, le profil de la surface secondaire intérieure 21 forme un angle A2i d'environ 27° avec l'axe X-ιo-X'10, tandis que le profil de la surface secondaire extérieure 22 forme un angle A22 d'environ 45° avec l'axe Xio-X'io- Ainsi, les surfaces secondaires 21 et 22, et plus particulièrement leurs portions aval respectives 21 b et 22b, sont inclinées l'une par rapport à l'autre d'un angle A22-A2I de 20° et elles présentent des directions divergentes vers l'aval, c'est-à-dire vers leurs arêtes 23 et 24. En pratique, des résultats satisfaisants peuvent être obtenus lorsque les surfaces secondaires 21 et 22 forment, entre elles et dans un plan de symétrie de l'organe 10, un angle compris entre 16° et 24°.The primary 20 and secondary surfaces 21 and 22 of the member 10 all have a symmetry of revolution about the axis Xio-X ' 1 0 which coincides with the axis Xi-X'i, when the member 10 is mounted on the rotor 1. These surfaces are therefore co-axial and the edges 23 and 24 in the form of a circle whose centers belong to the axis X 10 -X 1 I0 . In practice, the edges 23 and 24 may have small reliefs or "notches" to better spray the coating product. The primary and secondary surfaces 21 and 22 each have the shape of a truncated cone with a circular base and axis Xio-X'i. In the radial plane of FIG. 2, the profile of the primary surface 20 forms a angle A 2 o of about 32 ° with the axis X 1o -X'io- In the radial plane of Figure 2, the profile of the inner secondary surface 21 forms an angle A 2 i of about 27 ° with the X-axis X-X '10 , while the profile of the outer secondary surface 22 forms an angle A 22 of approximately 45 ° with the axis Xio-X'io- Thus, the secondary surfaces 21 and 22, and more particularly their respective downstream portions 21b and 22b, are inclined relative to each other by an angle A 22 -A 2I of 20 ° and they have divergent directions downstream, that is to say towards their edges 23 and 24. In practice, satisfactory results can be obtained when the secondary surfaces 21 and 22 form, between them and in a plane of symmetry of the member 10, an angle of between 16 ° and 24 °.
Compte tenu de leurs inclinaisons différentes et de leurs longueurs respectives, les surfaces secondaires 21 et 22 définissent des arêtes circulaires 23 et 24 présentant des diamètres D23 et D24 sensiblement différents. Pour exemple, le diamètre D23 peut être de 54 mm, tandis que le diamètre D24 peut être de 64 mm environ. Ainsi, le diamètre D23 de l'arête intérieure 23 est sensiblement inférieur au diamètre D24 de l'arête extérieure 24. La divergence des surfaces 21 et 22 permet d'éviter au maximum que ne se recombinent les jets de produit pulvérisé respectivement par les arêtes intérieure 23 et extérieure 24. Le terme « recombiné » désigne ici le mélange des jets l'un à l'autre, qui pose à la fois un problème de perturbations aérauliques et un problème de confluence des gouttelettes.Given their different inclinations and their respective lengths, the secondary surfaces 21 and 22 define circular ridges 23 and 24 having substantially different diameters D 23 and D 24 . For example, the diameter D 23 may be 54 mm, while the diameter D 24 may be about 64 mm. Thus, the diameter D 23 of the inner edge 23 is substantially smaller than the diameter D 24 of the outer edge 24. The divergence of the surfaces 21 and 22 makes it possible to avoid as much as possible that the jets of product sprayed respectively by the inner and outer edges 23 and 24. The term "recombinant" refers here to the mixing of the jets with each other, which poses both a problem of aeraulic disturbances and a problem of confluence of the droplets.
La construction de l'organe 10 conformément à l'invention permet donc d'éviter ou de limiter la recombinaison des jets, qui résulterait notamment dans l'augmentation de la taille des gouttelettes de produit. Ainsi, on peut obtenir une pulvérisation homogène présentant des gouttelettes fines et de taille uniforme. De plus, la différence entre les diamètres D23 et D24 permet d'assurer une bonne séparation des jets de produit pulvérisé sans allonger axialement l'organe 10 de façon trop importante. Or, cette compacité axiale de l'organe 10 permet par exemple à un robot multiaxes de manipuler facilement un projecteur rotatif qui en est équipé autour et dans les objets O à revêtir.The construction of the member 10 according to the invention thus makes it possible to avoid or limit the recombination of the jets, which would result in particular in increasing the size of the product droplets. Thus, it is possible to obtain a homogeneous spray having fine droplets of uniform size. In addition, the difference between the diameters D 23 and D 24 makes it possible to ensure good separation of the jets of sprayed product without axially lengthening the member 10 excessively. However, this axial compactness of the member 10 allows for example a multi-axis robot to easily manipulate a rotating projector which is equipped around and in the objects O to be coated.
Les arêtes 23 et 24 ne sont pas dans le même plan, mais décalées axialement l'une par rapport à l'autre, l'arête extérieure 24 étant en retrait d'une distance di non nulle vers l'amont par rapport à l'arête intérieure 23. Pour exemple, la distance di de retrait de l'arête 24 par rapport à l'arête 23, visible à la figure 3, peut être de 1 mm. De préférence, la distance di est supérieure à 1 % du diamètre D23 de l'arête intérieure 23. Plus le retrait d-i est important, moins les jets de produit pulvérisé risquent de se recombiner. Dans le mode de réalisation illustré par les figures 2 à 4, les surfaces secondaires 21 et 22 sont réalisées dans la même pièce que la surface primaire 20. L'organe 10 est donc monobloc, ce qui permet d'obtenir un bon équilibre en rotation, dans la mesure où son usinage est réalisé avec précision.The edges 23 and 24 are not in the same plane, but offset axially with respect to each other, the outer edge 24 being set back by a non-zero distance di upstream with respect to the Inner edge 23. For example, the distance di of withdrawal of the edge 24 with respect to the edge 23, visible in FIG. 3, can be 1 mm. Preferably, the distance di is greater than 1% of the diameter D 23 of the inner edge 23. The greater the shrinkage di, the less jets of sprayed product may recombine. In the embodiment illustrated in FIGS. 2 to 4, the secondary surfaces 21 and 22 are made in the same room as the primary surface 20. The member 10 is therefore one-piece, which makes it possible to obtain a good balance in rotation , to the extent that its machining is carried out with precision.
L'organe 10 comprend en outre des canaux 40 de distribution du produit de revêtement qui s'étendent chacun entre une entrée 40a située sur une portion amont 21a de la surface secondaire intérieure 21 et une sortie 40b située face à une portion amont 22a de la surface secondaire extérieure 22. En fait, l'entrée 40a d'un canal 40 se trouve à la jointure de la portion aval de la surface primaire 20 et de la portion amont 21a de la surface secondaire intérieure 21.The member 10 further comprises channels 40 for dispensing the coating product which each extend between an inlet 40a located on an upstream portion 21a of the inner secondary surface 21 and an outlet 40b facing an upstream portion 22a of the In fact, the inlet 40a of a channel 40 is at the joint of the downstream portion of the primary surface 20 and the upstream portion 21a of the inner secondary surface 21.
Les entrées 40a de tous les canaux 40 sont disposées sur un anneau de forme tronconique et coaxial à la surface secondaire 21 et donc à son arête 23. De même, les sorties 40b sont disposées sur un anneau de forme tronconique et coaxial à la surface secondaire 22 et donc à son arête 24.The inputs 40a of all the channels 40 are arranged on a ring of frustoconical shape and coaxial with the secondary surface 21 and thus at its edge 23. Likewise, the outlets 40b are arranged on a ring of frustoconical shape and coaxial with the secondary surface. 22 and therefore at its edge 24.
Les canaux 40 sont constitués de perçages cylindriques réalisés dans une aile 26 de l'organe 10 formant la surface secondaire intérieure 21. Les canaux 40 présentent par exemple un diamètre de 1 mm et s'étendent selon une direction oblique formant un angle A40 avec l'axe Xio-X'io dans un plan radial, c'est-à-dire dans un plan de symétrie de l'organe 10. Dans le plan de la figure 3, l'angle A40 vaut environ 45°. Les centres des entrées 40a sont situés à une distance d4o de l'arête 23 valant par exemple 10 mm.The channels 40 consist of cylindrical holes made in a flange 26 of the member 10 forming the inner secondary surface 21. The channels 40 have for example a diameter of 1 mm and extend in an oblique direction forming an angle A 40 with Xio-X'io axis in a radial plane, that is to say in a plane of symmetry of the member 10. In the plane of Figure 3, the angle A 40 is about 45 °. The centers of the inputs 40a are situated at a distance d 4 o from the ridge 23 of, for example, 10 mm.
Les canaux 40 ont pour fonction de distribuer le produit de revêtement provenant de la surface primaire 20 à la surface secondaire extérieure 22. Pour réaliser une distribution uniforme, les canaux 40 sont répartis régulièrement autour de l'axe Xio-X'io- La fraction de produit de revêtement qui ne s'écoule pas dans les canaux 40 passe entre ces canaux et atteint la surface secondaire intérieure 21. Le partage du produit de revêtement entre les surfaces secondaires 21 et 22 se produit donc à la jointure entre la surface primaire 20 et la surface secondaire 21 , c'est-à-dire au niveau de la portion amont 21a de cette dernière. La position et l'orientation des canaux 40 sont déterminées par le passage de l'outil de perçage entre les ailes 26 et 27. Les canaux 40 sont percés de manière à tangenter le plus possible la surface secondaire extérieure 22, ce qui facilite le nettoyage de cette surface et réduit son usure par le produit de revêtement. Comme le montre la figure 4, l'organe 10 comprend également des orifices 50 qui s'étendent chacun entre une entrée 50a située sur la surface externe 101 de l'organe 10 et une sortie 50b située sur une portion amont 22A de la surface secondaire extérieure 22. Les orifices 50 sont réalisés par une opération de perçage cylindrique effectuée dans une aile 27 qui définit la surface secondaire 22. Chaque orifice 50 est ici rectiligne et s'étend selon un axe contenu dans un plan radial. Il présente un diamètre équivalent au diamètre des canaux 40, par exemple de 1 mm, et leur entrée 50a ou leur sortie 50b sont disposées sur un anneau coaxial aux arêtes 23 et 24. Dans le plan de la figure 4, les orifices 50 sont obliques et forment un angle A50 d'environ 25° avec l'axe Xio-X'io- Alternativement, on peut prévoir des canaux 40 et/ou des orifices 50 présentant des diamètres différents.The channels 40 have the function of distributing the coating product from the primary surface 20 to the outer secondary surface 22. To achieve uniform distribution, the channels 40 are regularly distributed around the Xio-X'i axis. coating material which does not flow into the channels 40 passes between these channels and reaches the inner secondary surface 21. The partition of the coating product between the secondary surfaces 21 and 22 therefore occurs at the joint between the primary surface 20 and the secondary surface 21, that is to say at the upstream portion 21a of the latter. The position and the orientation of the channels 40 are determined by the passage of the tool of piercing between the wings 26 and 27. The channels 40 are drilled so as to tangential as much as possible the outer secondary surface 22, which facilitates the cleaning of this surface and reduces its wear by the coating product. As shown in Figure 4, the member 10 also comprises orifices 50 which each extend between an inlet 50a located on the outer surface 101 of the member 10 and an outlet 50b located on an upstream portion 22A of the secondary surface 22. The orifices 50 are made by a cylindrical drilling operation performed in a flange 27 which defines the secondary surface 22. Each orifice 50 is here rectilinear and extends along an axis contained in a radial plane. It has a diameter equivalent to the diameter of the channels 40, for example 1 mm, and their inlet 50a or their outlet 50b are arranged on a ring coaxial with the edges 23 and 24. In the plane of Figure 4, the orifices 50 are oblique and form an angle A 50 of about 25 ° with the axis Xio-X'10. Alternatively, channels 40 and / or orifices 50 having different diameters can be provided.
Du fait de leur inclinaison, les orifices 50 induisent un flux d'air sur le côté externe de l'aile 26 formant la surface secondaire intérieure 21 , lorsque l'organe 10 est en rotation. Un tel flux d'air permet de combler la dépression créée entre les arêtes 24 et 23 et ainsi d'éviter le retour de gouttelettes pulvérisées par l'arête intérieure 23 dans le volume situé entre les ailes 26 et 27. De plus, ce flux d'air permet de créer une jupe d'air induit encadrant le jet pulvérisé par l'arête intérieure 23, ce qui empêche la recombinaison de ce dernier avec le jet pulvérisé par l'arête 24. A l'instar des canaux 40, les orifices 50 sont répartis de manière régulière autour de l'axe Xio-X'io- Ns débouchent donc au niveau de la portion amont de la surface secondaire extérieure 22 de façon alternée avec les canaux 40. Autrement dit, les orifices 50 et les canaux 40 sont en même nombre et ils sont disposés en alternance. On peut cependant prévoir des canaux 40 et des orifices 50 en nombres différents et/ou avec une répartition moins régulière.Because of their inclination, the orifices 50 induce a flow of air on the outer side of the flange 26 forming the inner secondary surface 21, when the member 10 is rotating. Such an air flow makes it possible to fill the depression created between the ridges 24 and 23 and thus to prevent the return of droplets sprayed by the inner edge 23 into the volume situated between the wings 26 and 27. Moreover, this flow of air allows to create an induced air skirt flanking the jet sprayed by the inner edge 23, which prevents the recombination of the latter with the jet sprayed by the edge 24. Like the channels 40, the orifices 50 are distributed regularly around the axis Xio-X'i-Ns therefore open at the upstream portion of the outer secondary surface 22 alternately with the channels 40. In other words, the orifices 50 and the channels 40 are the same number and they are arranged alternately. However, it is possible to provide channels 40 and orifices 50 in different numbers and / or with a less regular distribution.
Pendant la pulvérisation, l'organe 10 tourne autour de son axe Xio- X'io à très grande vitesse, typiquement comprise entre 30.000 et 70.000 trs/min. Le produit de revêtement, tel qu'une peinture liquide, est amené par l'injecteur 5 et il éclate contre la face amont du distributeur 7, avant de se répartir et de s'étaler sur la surface primaire 20. En aval de la surface primaire 20, la peinture se répartit et s'étale sur la surface secondaire intérieure 21 jusqu'à atteindre l'arête de pulvérisation 23 où elle se divise en fines gouttelettes.During spraying, the member 10 rotates about its Xio-X'i axis at a very high speed, typically between 30,000 and 70,000 rpm. The coating product, such as a liquid paint, is supplied by the injector 5 and it bursts against the upstream face of the distributor 7, before distributing and spreading on the primary surface 20. Downstream of the primary surface 20, the paint is distributed and spread over the secondary surface 21 until reaching the spraying edge 23 where it splits into fine droplets.
Sous l'effet des forces centrifuges, une fraction de la peinture provenant de la surface primaire 20 passe par les canaux 40, puis se répartit et s'étale sur la surface secondaire extérieure 22 jusqu'à atteindre l'arête de pulvérisation 24 où elle se divise en fines gouttelettes. Pour permettre au film de peinture de s'étaler convenablement sur la surface secondaire extérieure 22 après sa sortie des canaux 40, il est souhaitable de prévoir une surface secondaire 22 possédant une longueur L suffisante. En pratique, la longueur L doit être supérieure à 5 mm et de préférence à 10 mm. Pour un diamètre de canal 40 et pour un nombre de canaux 40, donnés, le partage de la peinture entre les arêtes intérieure 23 et extérieure 24 dépend du débit de produit et de la vitesse de rotation de l'organe 10. Ces paramètres peuvent être choisis pour opérer un partage à hauteur d'environ 50% pour chacune des arêtes. On peut également partager la peinture à raison de 30% pour l'arête intérieure 23 et 70% pour l'arête extérieure 24, selon les paramètres de fonctionnement adoptés en fonction de l'application souhaitée.Under the effect of the centrifugal forces, a fraction of the paint coming from the primary surface 20 passes through the channels 40, then distributes and spreads on the outer secondary surface 22 until reaching the spray edge 24 where it splits into fine droplets. To allow the paint film to spread properly on the outer secondary surface 22 after its exit from the channels 40, it is desirable to provide a secondary surface 22 having a sufficient length L. In practice, the length L must be greater than 5 mm and preferably 10 mm. For a given channel diameter 40 and for a given number of channels 40, the partitioning of the paint between the inner 23 and outer 24 edges depends on the product flow and on the speed of rotation of the member 10. These parameters can be chosen to perform a share of about 50% for each of the edges. The paint can also be divided by 30% for the inner edge 23 and 70% for the outer edge 24, depending on the operating parameters adopted as a function of the desired application.
Par ailleurs, une zone annulaire crantée 60 peut être ménagée sur la surface primaire 20 de façon à mettre en mouvement toutes les couches du film de peinture qui y est étalé à la même vitesse tangentielle que les canaux 40. Cela permet de favoriser le passage de la peinture dans les canaux 40 et d'assurer que le débit demeure constant sur chaque arête 23 et 24 pour une vitesse de rotation de l'organe 10 donnée. En pratique, les crantages de la zone 60 peuvent être de 2,5 mm de longueur, de 0,15 mm de profondeur et espacés avec un pas de 0,3 mm. On peut également envisager de prolonger les crantages dans chaque canal 40 de façon à amplifier leur influence sur l'écoulement de la peinture. La figure 5 illustre un deuxième mode de réalisation d'un organe de pulvérisation conforme à l'invention. Les éléments similaires portent les mêmes références que sur les figures précédentes, augmentées de 100. L'organe 110 illustré par la figure 5 diffère de l'organe 10 par sa structure et par la forme de ses surfaces primaire et secondaires. Les surfaces secondaires intérieure 121 et extérieure 122 sont ici des surfaces gauches ressemblant à des paraboloïdes de révolution autour d'un axe X-no-X'no- De même la surface primaire 120 présente une forme assimilable à un paraboloïde de révolution. Par surface gauche on désigne une surface non droite, c'est-à-dire une surface à profil courbe ou concave par rapport au bol 131.Furthermore, a notched annular zone 60 may be formed on the primary surface 20 so as to set in motion all the layers of the paint film which is spread there at the same tangential speed as the channels 40. This makes it possible to promote the passage of the paint in the channels 40 and ensure that the flow remains constant on each edge 23 and 24 for a given rotation speed of the member 10. In practice, the notches of the zone 60 may be 2.5 mm long, 0.15 mm deep and spaced with a pitch of 0.3 mm. One can also consider extending the notches in each channel 40 so as to amplify their influence on the flow of the paint. FIG. 5 illustrates a second embodiment of a spraying member according to the invention. Similar elements bear the same references as in the previous figures, increased by 100. The member 110 illustrated in Figure 5 differs from the body 10 by its structure and by the shape of its primary and secondary surfaces. The internal 121 and outer secondary surfaces 122 are here left surfaces resembling paraboloids of revolution about an axis X-no-X'no- Similarly the primary surface 120 has a shape similar to a paraboloid of revolution. By left surface is meant a non-straight surface, that is to say a curved or concave profile surface with respect to the bowl 131.
Comme dans le cas de l'organe 10, les portions aval 121 b et 122b des surfaces secondaires 121 et 122 forment respectivement par rapport à l'axe central Xno-X'no des angles moyens A121 et A122 qui définissent des directions globalement divergentes vers l'aval, c'est-à-dire vers l'objet O à revêtir. Dans un plan radial, l'angle moyen d'une portion aval dont le profil n'est pas rectiligne, peut être évalué comme la moyenne des angles formés par les tangentes en chaque point de ce profil avec l'axe central. En pratique, il suffit de moyenner les angles formés par quelques tangentes, par exemple quatre, réparties régulièrement le long du profil de la portion aval. En l'occurrence, les directions définies par les angles A121 et A122 des portions aval 121b et 122b des surfaces secondaires 121 et 122 sont divergentes et elles forment entre elles un angle d'environ 10°. Comme dans le premier mode de réalisation, cela permet d'éviter la recombinaison des jets pulvérisés par les arêtes intérieure 123 et extérieure 124.As in the case of the member 10, the downstream portions 121b and 122b of the secondary surfaces 121 and 122 respectively form, with respect to the central axis Xno-X'no, mean angles A 12 1 and A1 22 which define directions globally divergent downstream, that is to say toward the object O to be coated. In a radial plane, the average angle of a downstream portion whose profile is not rectilinear, can be evaluated as the average of the angles formed by the tangents at each point of this profile with the central axis. In practice, it suffices to average the angles formed by a few tangents, for example four, regularly distributed along the profile of the downstream portion. In this case, the directions defined by the angles A 121 and A122 of the downstream portions 121b and 122b of the secondary surfaces 121 and 122 are divergent and they form between them an angle of about 10 °. As in the first embodiment, this makes it possible to avoid the recombination of the jets sprayed by the inner 123 and outer edges 124.
Compte tenu de la géométrie des surfaces secondaires 121 et 122, le passage d'un outil de perçage entre les arêtes 123 et 124 serait délicat à mettre en œuvre pour réaliser des canaux 140 destinés à distribuer le produit de revêtement. C'est pourquoi l'organe 110 est ici constitué d'un bol principal 131 dans lequel sont percés les canaux 140 préalablement à la solidarisation, par exemple par frettage, d'un anneau 132 destiné à former la surface secondaire extérieure 122. Des orifices analogues aux orifices 50 peuvent être réalisés par perçage dans l'organe 110 pour remplir des fonctions similaires.Given the geometry of the secondary surfaces 121 and 122, the passage of a piercing tool between the edges 123 and 124 would be difficult to implement to achieve channels 140 for dispensing the coating product. This is why the member 110 here consists of a main bowl 131 in which are drilled the channels 140 prior to the joining, for example by hooping, a ring 132 for forming the outer secondary surface 122. Orifices similar to ports 50 may be made by drilling into the member 110 to perform similar functions.
D'autres modes de réalisation sont possibles sans pour autant sortir du cadre de cette invention. On peut par exemple prévoir trois ou plus surfaces secondaires de répartition du produit, des canaux de distribution présentant des diamètres différents et/ou disposés sur plusieurs anneaux coaxiaux avec des entrées en quinconce.Other embodiments are possible without departing from the scope of this invention. For example, it is possible to provide three or more secondary surfaces for distributing the product, distribution channels having different diameters and / or arranged on several coaxial rings with staggered entrances.
Par ailleurs, l'invention a été représentée aux figures 1 et 2 avec un organe de pulvérisation fixé au rotor par effet magnétique. Cependant, l'organe de pulvérisation peut être fixé par tout autre moyen et il peut notamment être vissé au moyen d'un filetage 14, apte à coopérer avec un taraudage complémentaire ménagé dans le rotor 1 , comme le montre la figure 5 pour l'organe 110. Furthermore, the invention has been shown in Figures 1 and 2 with a spraying member attached to the rotor by magnetic effect. However, the spraying member may be fixed by any other means and it may in particular be screwed by means of a thread 14, adapted to cooperate with a complementary thread formed in the rotor 1, as shown in FIG. 5 for the body 110.

Claims

REVENDICATIONS
1. Organe de pulvérisation (10 ; 110) pour un dispositif (P) de projection de produit de revêtement, ledit organe de pulvérisation (10 ; 110) comprenant une surface primaire (20 ; 120) de répartition du produit et au moins deux surfaces secondaires, intérieure (21 ; 121) et extérieure (22 ; 122), de répartition du produit s'étendant en aval de la surface primaire (20 ; 120), les surfaces primaire (20 ; 120) et secondaires (21 , 22 ; 121 , 122) étant coaxiales (Xio-X'io ; Xno-X'no). les portions aval des surfaces secondaires (21 , 22 ; 121 , 122) définissant respectivement au moins une arête intérieure (23 ; 123) de pulvérisation et au moins une arête extérieure (24 ; 124) de pulvérisation, les portions aval (21b, 22b ; 121b, 122b) des surfaces secondaires (21 , 22 ; 121 , 122) présentant l'une par rapport à l'autre des directions (A2i, A22 ; A121, Ai22) globalement divergentes vers l'aval, caractérisé en ce que l'arête intérieure (23 ; 123) présente un diamètre (D23) sensiblement inférieur au diamètre (D24) de l'arête extérieure (24 ; 124).Spray device (10; 110) for a coating product spraying device (P), said spraying member (10; 110) comprising a primary product distribution surface (20; 120) and at least two surfaces secondary, inner (21; 121) and outer (22; 122), product distribution extending downstream of the primary surface (20; 120), the primary surfaces (20; 120) and secondary surfaces (21, 22; 121, 122) being coaxial (Xio-X'io;Xno-X'no). the downstream portions of the secondary surfaces (21, 22; 121, 122) defining respectively at least one inner edge (23; 123) of spray and at least one outer edge (24; 124) of spray, the downstream portions (21b, 22b). 121b, 122b) secondary surfaces (21, 22; 121, 122) having relative to each other generally diverging directions (A 2 , A 22 , A 121 , A 22 ) towards the downstream, characterized in that the inner edge (23; 123) has a diameter (D 23 ) substantially smaller than the diameter (D 24 ) of the outer edge (24; 124).
2. Organe de pulvérisation (10 ; 110) selon la revendication 1 , caractérisé en ce que l'arête extérieure (24 ; 124) est axialement en retraitSpray device (10; 110) according to claim 1, characterized in that the outer edge (24; 124) is axially recessed.
(di) vers l'amont par rapport à l'arête intérieure (23 ; 123).(di) upstream with respect to the inner edge (23; 123).
3. Organe de pulvérisation (10 ; 110) selon l'une des revendications précédentes, caractérisé en ce qu'il comprend en outre des canaux (40 ; 140) de distribution du produit de revêtement s'étendant chacun entre une entrée (40a ; 140a) située sur une portion amont (21a ; 121 a) de la surface secondaire intérieure (21 ; 121) et une sortie (40b ; 140b) située face à une portion amont (22a ; 122a) de la surface secondaire extérieure (22 ; 122), les entrées (40a ; 140a) et les sorties (40b ; 140b) étant disposées sur un anneau coaxial (X-io-X'io ; Xno-X'no) aux arêtes (23, 24 ; 123, 124). 3. sprayer (10; 110) according to one of the preceding claims, characterized in that it further comprises channels (40; 140) for distribution of the coating product each extending between an inlet (40a; 140a) located on an upstream portion (21a; 121a) of the inner secondary surface (21; 121) and an outlet (40b; 140b) facing an upstream portion (22a; 122a) of the outer secondary surface (22; 122), the inlets (40a; 140a) and the outlets (40b; 140b) being arranged on a coaxial ring (X-io-X'io; Xno-X'no) at the edges (23, 24; 123, 124). .
4. Organe de pulvérisation (10 ; 110) selon l'une des revendications précédentes, caractérisé en ce qu'il comprend en outre des orifices (50) s'étendant chacun entre une entrée (50a) située sur la surface externe (101) de l'organe de pulvérisation (10 ; 110) et une sortie (50b) située sur une portion amont (22a) de la surface secondaire extérieure (22), les entrées (50a) et sorties (50b) étant disposées sur un anneau coaxial (Xio-X'10 ; Xno- X'no) aux arêtes (23, 24).4. spray device (10; 110) according to one of the preceding claims, characterized in that it further comprises orifices (50) each extending between an inlet (50a) located on the outer surface (101) of the spray member (10; 110) and an outlet (50b) located on a upstream portion (22a) of the outer secondary surface (22), the inlets (50a) and outlets (50b) being disposed on a coaxial ring (Xio-X'10; Xno- X'no) at the edges (23, 24) .
5. Organe de pulvérisation (10 ; 110) selon l'une des revendications 3 et 4, caractérisé en ce que les canaux (40) et les orifices (50) sont constitués de perçages cylindriques dont les sorties (40b, 50b) sont réparties de façon alternée au niveau de la portion amont (22a) de la surface secondaire extérieure (22).5. Spraying member (10; 110) according to one of claims 3 and 4, characterized in that the channels (40) and the orifices (50) consist of cylindrical bores whose outputs (40b, 50b) are distributed alternately at the upstream portion (22a) of the outer secondary surface (22).
6. Organe de pulvérisation (10 ; 110) selon l'une des revendications 4 à 5, caractérisé en ce que les canaux (40 ; 140) et/ou les orifices (50) présentent des diamètres différents.Spray device (10; 110) according to one of Claims 4 to 5, characterized in that the channels (40; 140) and / or the orifices (50) have different diameters.
7. Organe de pulvérisation (10 ; 110) selon l'une des revendications 4 à 6, caractérisé en ce que les canaux (40 ; 140) et les orifices (50) sont en nombres différents. 7. sprayer (10; 110) according to one of claims 4 to 6, characterized in that the channels (40; 140) and the orifices (50) are in different numbers.
8. Organe de pulvérisation (10) selon l'une des revendications précédentes, caractérisé en ce que les surfaces secondaires (21 , 22) sont tronconiques.8. Spraying member (10) according to one of the preceding claims, characterized in that the secondary surfaces (21, 22) are frustoconical.
9. Organe de pulvérisation (10) selon la revendication 8, caractérisé en ce que les surfaces secondaires (21 , 22) forment entre elles et dans un plan de symétrie de l'organe de pulvérisation un angle (A22-A21) compris entre 16° et 24°, de préférence de 20°.9. sprayer (10) according to claim 8, characterized in that the secondary surfaces (21, 22) form between them and in a plane of symmetry of the spray member an angle (A 22 -A 21 ) included between 16 ° and 24 °, preferably 20 °.
10. Organe de pulvérisation (10) selon l'une des revendications 8 et 9, caractérisé en ce que la surface secondaire extérieure (22) possède une longueur (L) supérieure à 5 mm, de préférence à 10 mm. 10. sprayer (10) according to one of claims 8 and 9, characterized in that the outer secondary surface (22) has a length (L) greater than 5 mm, preferably 10 mm.
11. Organe de pulvérisation (110) selon l'une des revendications 1 àSpray device (110) according to one of claims 1 to
7, caractérisé en ce que les surfaces secondaires (121 , 122) sont gauches.7, characterized in that the secondary surfaces (121, 122) are left.
12. Organe de pulvérisation (10) selon l'une des revendications 1 à 11 , caractérisé en ce qu'il est monobloc, les surfaces secondaires (21 , 22) et primaire (20) étant définies par une même pièce. 12. Spraying member (10) according to one of claims 1 to 11, characterized in that it is monobloc, the secondary surfaces (21, 22) and primary (20) being defined by the same piece.
13. Organe de pulvérisation (110) selon l'une des revendications 1 àSpray device (110) according to one of claims 1 to
11 , caractérisé en ce qu'il est composé d'un corps (131) définissant la surface primaire (120) et l'une (121) des surfaces secondaires ainsi que d'une pièce (132) solidarisée au corps et définissant l'autre surface secondaire (122).11, characterized in that it is composed of a body (131) defining the primary surface (120) and one (121) of the secondary surfaces as well as one piece (132) secured to the body and defining the other secondary surface (122).
14. Dispositif rotatif (P) de projection de produit de revêtement comportant un organe de pulvérisation, des moyens d'entraînement (1) dudit organe en rotation et des moyens (5) d'alimentation dudit organe en produit de revêtement, caractérisé en ce que ledit organe de pulvérisation (10 ; 110) est selon l'une des revendications précédentes.14. Rotating device (P) for spraying coating product comprising a spraying member, means for driving (1) said rotating member and means (5) for feeding said member with a coating product, characterized in that said spray member (10; 110) is according to one of the preceding claims.
15. Installation (I) de projection de produit de revêtement, caractérisée en ce qu'elle comprend au moins un dispositif rotatif (P) de projection de produit de revêtement selon la revendication 14. 15. Apparatus (I) for projecting coating product, characterized in that it comprises at least one rotary device (P) coating product projection according to claim 14.
EP08805487.9A 2007-04-23 2008-04-22 Spraying member, spraying device comprising such a member and spraying installation comprising such a device Active EP2142307B1 (en)

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FR0702928A FR2915114B1 (en) 2007-04-23 2007-04-23 SPRAYING DEVICE, PROJECTION DEVICE COMPRISING SUCH AN ORGAN, AND PROJECTION INSTALLATION COMPRISING SUCH A DEVICE
PCT/FR2008/000566 WO2008145845A1 (en) 2007-04-23 2008-04-22 Spraying member, spraying device comprising such a member and spraying installation comprising such a device

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JP4428973B2 (en) * 2003-09-10 2010-03-10 トヨタ自動車株式会社 Rotating atomizing coating apparatus and coating method

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Also Published As

Publication number Publication date
US8851399B2 (en) 2014-10-07
ES2449241T3 (en) 2014-03-18
US20100193604A1 (en) 2010-08-05
WO2008145845A1 (en) 2008-12-04
EP2142307B1 (en) 2013-11-27
FR2915114A1 (en) 2008-10-24
PL2142307T3 (en) 2014-06-30
FR2915114B1 (en) 2010-09-10

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