EP2429716A1 - Projecteur et organe de pulverisation de produit de revetement et procede de projection mettant en oeuvre un tel projecteur - Google Patents
Projecteur et organe de pulverisation de produit de revetement et procede de projection mettant en oeuvre un tel projecteurInfo
- Publication number
- EP2429716A1 EP2429716A1 EP10728750A EP10728750A EP2429716A1 EP 2429716 A1 EP2429716 A1 EP 2429716A1 EP 10728750 A EP10728750 A EP 10728750A EP 10728750 A EP10728750 A EP 10728750A EP 2429716 A1 EP2429716 A1 EP 2429716A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- air
- flow surface
- distributor
- air distributor
- projector
- 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
Links
- 239000011248 coating agent Substances 0.000 title claims abstract description 99
- 238000000576 coating method Methods 0.000 title claims abstract description 99
- 238000005507 spraying Methods 0.000 title claims abstract description 42
- 239000000463 material Substances 0.000 title claims abstract description 26
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 45
- 239000007921 spray Substances 0.000 claims description 16
- 239000007787 solid Substances 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000002347 injection Methods 0.000 description 12
- 239000007924 injection Substances 0.000 description 12
- 239000003973 paint Substances 0.000 description 10
- 238000009826 distribution Methods 0.000 description 6
- 230000008021 deposition Effects 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 241000782128 Albizia adianthifolia Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 210000003414 extremity Anatomy 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000004476 plant protection product Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
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
- B05B3/1064—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
- B05B3/1092—Means for supplying shaping gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
Definitions
- the present invention relates to a rotary projector coating product.
- the present invention also relates to a rotating device for spraying coating product.
- the present invention relates to a coating product spraying method which implements such a rotating projector.
- Conventional spraying by means of rotating projectors is used to apply a coating product to objects to be coated, such as motor vehicle bodies.
- coating product is meant any product intended to be projected in the form of droplets on an object to be coated, such as a primer, a paint, a varnish or a plant protection product to be sprayed on plants etc.
- 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.
- 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 orifices. These orifices are formed in the body of the rotating projector, on a circle which is located on the outer periphery of the bowl and which is centered on the axis of symmetry of the bowl. These orifices are intended to emit air jets to conform the jet of coating product.
- JP-A-8 071 455 describes such a rotary projector for which the air jets emitted from the outer periphery of the bowl are intended to reduce the existing depression downstream of the bowl and to obtain a uniform deposited paint film.
- an object coated with such a rotating projector has impacts whose profiles are sometimes irregular and generally not robust.
- the robustness of an impact resulting from a rotary projector of a coating product corresponds substantially to the regularity of a curve representing, as a function of a determined parameter such as the skirt air flow, the "width of the 'impact', that is, the width of the area of median or greater deposited thickness, considered in a direction perpendicular to the direction of relative movement between the rotating projector and the object to be coated.
- the deposition efficiency of such a rotating projector is relatively limited.
- the deposition efficiency is the ratio of the amount of coating product deposited on the object to be coated to the amount of coating product sprayed by means of the rotating projector.
- DE-A-10 2007 012 878 discloses a projector in which an air flow is used to shape a central spray of paint and to press a peripheral flow against a flow surface of a bowl.
- the air injection means located outside the flow surface of the bowl do not affect the robustness of the impact of the coating product or the deposition efficiency.
- the present invention aims in particular to overcome these disadvantages by providing a rotating coating product projector to fill the depression downstream of the bowl, to obtain a good robustness of the impacts of coating products on the objects to be coated and to limit the dirt on the bowl components.
- the subject of the invention is a rotary coating product projector comprising a fixed body, a device for spraying the coating product, means for driving the spraying member about a rotation axis in a direction of rotation. rotation, feeding means of the organ of spraying coating product, while the spraying member of the coating product comprises at least one flow surface which is intended to receive the coating product and at least one edge for spraying the coating product, the edge being in fluid communication with the flow surface.
- This rotating projector further comprises means for injecting air into a region located radially inside the volume defined by the flow surface and upstream of the edge, the means for injecting air being distinct.
- means for supplying the coating product comprises an air distributor which is arranged in an upstream portion of the flow surface for injecting air into a central region, radially and axially, of the flow surface. .
- the invention in particular to the arrangement of the air distributor, air can be injected into the spray member during the painting feed, which improves the robustness and deposition efficiency when spraying.
- the fact that the air distributor is arranged in the upstream part of the flow surface means that it is surrounded radially by this surface and located axially at least at least part of this area. area.
- the means for injecting air are arranged so as to direct all or part of the air towards the flow surface;
- the air distributor is disjoint from the spraying member and fixed relative to the fixed body;
- the air distributor comprises a nozzle which is removably attached to the means for injecting air and / or the supply means;
- the means for injecting air comprise an air duct extending upstream of the spraying member, the downstream section of the air duct extending substantially parallel to and near the axis of rotation; this downstream section preferably being coaxial with the axis of rotation;
- the coating material supply means comprises a pipe whose downstream section extends generally parallel to the air duct and at a distance from the axis of rotation;
- the coating material supply means comprises a pipe which has a tubular shape and which extends around the air duct;
- the air distributor is formed at a downstream portion of the air duct
- the air distributor is secured to the spray member
- the air distributor has at least one opening disposed upstream of the air distributor to receive a flow of air, and at least one channel extending downstream of the opening;
- the air distributor comprises several channels converging downstream of the opening and whose ejection directions are distributed in a solid angle greater than the solid angle inscribing the flow area and less than 2 ⁇ steradians (sr) some channels being directed to the flow surface;
- downstream axial surface of the air distributor is totally or partially flat
- the downstream axial surface of the air distributor is curved, preferably in the form of a portion of a sphere; and - the flow surface generally has a symmetry of revolution relative to the axis of rotation and the air distributor has a generally frustoconical outer surface around the axis of rotation, the outer surface defining with the surface of flow, a passage for the coating product.
- the subject of the present invention is a rotatable coating product spraying device comprising at least one flow surface which is intended to receive the coating product supplied by means for supplying the coating product and at least one edge for spraying the coating material, the edge being in fluid communication with the flow surface.
- This rotary member further comprises means for injecting air into a region located radially inside the volume defined by the flow surface and upstream of the edge, the means for injecting air. being distinct from the coating product supply means.
- the means for injecting air comprise an air distributor which is arranged in an upstream portion of the flow surface for injecting air into a central region, radially and axially, of the flow surface and which is integral of the spraying member.
- the subject of the invention is a method for projecting a coating product, implementing a rotating projector as explained above, and comprising the following steps:
- FIG. 1 is a perspective view broken away of a rotating projector according to the invention, comprising a spraying member according to the invention
- FIG. 2 is a sectional view, on a larger scale and according to the plane II in Figure 1, a portion of the projector;
- FIG. 3 is a view similar to Figure 2 of a portion of a projector and a spray member according to a second embodiment of the invention
- FIG. 4 is a view similar to Figure 2 of a portion of a projector and a spraying member according to a third embodiment of the invention
- FIG. 5 is a view similar to Figure 2 of a portion of a projector and a spraying member according to a fourth embodiment of the invention
- FIG. 6 is a view similar to FIG. 2 of part of a projector according to a fifth embodiment of the invention.
- - Figure 7 is a view similar to Figure 2 of a portion of a projector according to a sixth embodiment of the invention;
- FIG. 8 is a graph illustrating certain advantages of the rotating projector and the spraying member according to the invention compared to the prior art.
- FIG. 1 shows a rotating projector P for the projection of coating product comprising a spraying member 1, hereinafter referred to as a bowl.
- the bowl 1 is partially housed within a fixed body 2.
- the bowl 1 is shown in a spraying position where it is rotated at high speed about an axis Xi by rotary drive means, such as an air turbine T whose envelope is shown in dashed lines in Figure 1.
- the axis Xi is the axis of rotation of the bowl 1.
- the speed of rotation of the bowl 1 in charge that is to say ie when spraying coating material, may be between 25000 rpm and 100000 rpm.
- the fixed body 2 is said to be “fixed” because it does not rotate about the axis Xi.
- the fixed body 2 may be mounted on a not shown support such as a multiaxis robot arm.
- the bowl 1 has a symmetry of revolution about the axis Xi.
- the bowl 1 comprises a flow surface 11, which is intended to receive the coating product in a film which spreads, under the effect of centrifugal force, to an edge 12 where this product is micronized in fine droplets.
- flow surface is designated the hollow inner surface of the bowl 1, that is to say its surface facing the axis Xi.
- the edge 12 and the flow surface 11 are in fluid communication, so that the coating material film can flow from the flow surface 11 to the edge 12 which borders the surface of the flow surface 11. flow downstream.
- the set of droplets sprayed at the edge 12 forms a coating product jet, not shown, which leaves the bowl 1 and goes towards an object to be coated, not shown, on which this jet produces an impact.
- the bowl 1 has an outer surface 13 which faces the fixed body 2.
- the outer surface 13 is called “external” because it is not turned towards the axis Xi.
- the flow surface 11 can be described as “internal” because it is turned towards the axis Xi As shown in FIG.
- the flow surface 11 consists of an upstream portion 11.1, which is a section of axis Xi, and a downstream portion 11.2 which consists of two frustoconical surfaces of axis X 1 juxtaposed and connected to each other, the vertex angle of the frustoconical surface connected to the edge 12 being less than the vertex angle of the frustoconical surface connected to the upstream portion 11.1.
- the edge 12 generally has the shape of a circle of diameter D 12 centered on the axis Xi. Not shown notches are formed between the flow surface 11 and the edge 12 to improve the control of the size of the sprayed droplets at the edge 12.
- the diameter Di 2 may be, for example, equal to 65 mm .
- the rotating projector P further comprises a duct 24 for bringing fluids, liquid or gaseous, involved in the operation of the bowl 1 object of the invention.
- the duct 24 is illustrated in dashed lines in FIG. 1 and its downstream portion 22 is partially illustrated in FIG. 2.
- the duct 24 makes it possible to supply air and coating product at the level of the bowl 1.
- the duct 24 can bring solvents and cleaning air to the bowl 1.
- the downstream section 22 of the pipe 24 comprises an air duct 20 and a pipe 21 for feeding the bowl 1 coating product.
- the downstream section of the air duct 20 has a cylindrical shape that extends upstream of the bowl 1 and coaxially with the axis Xi.
- the downstream section of the air duct 20 may extend generally parallel to and near the axis Xi.
- upstream and downstream refer to the direction of flow of the coating product from the base of the rotating projector P, located to the right of Figure 1, to the edge 12, located on the left of Figure 1.
- the pipe 21 forms feed means of the bowl 1 coating product.
- the downstream section of the pipe 21 consists of a cylindrical bore which extends substantially parallel to the air duct 20, and therefore to the axis Xi, at a radial distance R 2 i from the axis Xi.
- the pipe 21 is eccentric in the duct 22 with respect to the air duct 20.
- the rotating projector P may comprise other supply means to bring the duct coating material in line 21.
- axial refers to an entity, part or direction, which extends along axis Xi of rotation and symmetry of bowl 1.
- radial applies to an entity, part or direction, which extends in a direction perpendicular to the axis Xi, such that the direction Y 1 in the plane of Figure 2.
- the channel 21 may have, as the pipe 121 described below in connection with Figure 3, a tubular shape extending around the air duct and coaxial with the axis of rotation.
- a tubular shape makes it possible to evenly distribute the coating product on the periphery of the air distributor and in the space separating the upstream face of the air distributor and the downstream face of the duct.
- the rotating projector P further comprises an air distributor 30 which is disposed near the end surface 23 of the downstream section 22 of the pipe 24.
- the end portion of the downstream section 22 extends through a upstream opening 14 of circular shape formed in the bowl 1.
- the air distributor 30 is disposed in the upstream portion 11.1 of the flow surface 1 1.
- the air distributor 30 is disposed downstream, with respect to the direction of flow of the air, the pipe of air 20.
- the air distributor 30 is integral with the bowl 1.
- the air distributor 30 and the bowl 1 are secured by fastening means which extend around the axis Xi, but not in the plane of Figure 2 where they are not shown.
- These fixing means may for example consist of magnets or screws.
- the air duct 20 and the air distributor 30 form means 3 for injecting air into a region situated radially inside the volume delimited by the flow surface 11 and upstream of the ridge. 12. This region is delimited, on the one hand, by the air distributor 30 and, on the other hand, by the downstream part 11.2 of the flow surface 11.
- the expression “to inject air” refers to the injection of air within the volume delimited by the flow surface of the bowl, if although this air then flows beyond the bowl 1.
- the rotating projector can be equipped with skirt air injection means, right and / or oblique (vortex), as is known per se.
- the means 3 for injecting air namely the air duct 20 associated with the air distributor 30, are distinct from the means for supplying the bowl 1 with the coating product, which in particular comprise the duct 21.
- the air distributor 30 is arranged to inject air into a central region 11.3 which belongs to the volume defined by the flow surface 11.
- the term "central” applies to the position of the central region 11.3 both in the radial direction Yi and in the axial direction Xi.
- the air distributor 30 has an opening 35 which is arranged on the upstream side of the air distributor 30 so as to receive a flow of air coming from the air duct 20.
- the opening 35 is placed in position.
- the aperture diameter 35 substantially corresponds to the diameter of the air duct 20.
- the air distributor 30 comprises several channels 32, 34 and 36 which extend rectilinearly into the air distributor 30.
- the channels 32, 34 and 36 converge in a common chamber 31 located downstream of the opening 35.
- the air distributor 30 comprises channels that extend out of the plane of FIG. 2 and whose inlet orifices are visible at the level of the common chamber 31.
- the dispenser 30 air 30 has the shape of a knob.
- the number of channels is between 1 and 30.
- the air distributor 30 has a pair of channels 32 and a pair of channels 34 which respectively have a symmetry with respect to the axis Xi.
- the jets of air produced by the channels 32, 34 and 36, when they are supplied by the air duct 20, are represented by straight arrows, even if they are actually air jets substantially. conical or cylindrical.
- the extent of the central region 1 1.3 may vary according to the geometry and the parameters of use such as the air flow or the orientation of the channels 32, 34 and 36.
- each channel 32 forms, with the axis Xi an angle A 32 .
- the direction of each channel 34 forms, with the axis Xi, an angle A 34 .
- the direction of the channel 36 forms, with the axis Xi, a zero angle.
- the angles A 32 , A 34 and A 36 are between 0 ° and 80 °.
- the respective directions of the channels 32, 34 and 36 are therefore distributed in a solid angle of less than 2 ⁇ sr.
- the channels 32 and the channels 34 are directed towards the flow surface, whose upstream portion 11.1 forms with the axis Xi an angle A 11 .
- the respective directions of the channels 32, 34 and 36 are therefore distributed in a solid angle which is greater than the solid angle inscribing the flow surface 11.
- the means for injecting air, the air channel 20 and the air distributor 30, are arranged to direct a portion of the air towards the flow surface 11. This part of the injected air makes it possible in particular to thin the film of coating product spread on the surface 11 by "rolling" it.
- the downstream axial surface 37 of the air distributor 30 is in the form of a totally planar disc where the outlets of the channels 32, 34 and 36 open out.
- the flat shape or flattened downstream axial surface 37 defines an air distributor 30 simple to manufacture and provides continuous or less disturbed air flows and reduced soiling areas.
- the air distributor 30 has an outer surface 30.1 which is generally frustoconical with an axis X 1.
- the apex angle of the outer surface 30.1 is equivalent to the apex angle of the upstream portion 11.1 of the flow surface 11.
- the outer surface 30.1 extends parallel to the upstream portion 11.1.
- the outer surface 30.1 and the upstream portion 11.1 define between them a passage 11 .4 for the coating product.
- the passage 11.4 makes it possible to direct the product of coating resulting from the pipe
- the bowl 1 and its air distributor 30 are rotated by the air turbine T.
- the coating product flows in the pipe 21, inside of the channel 22, to fill the space separating the end surface 23 of the upstream face 33 of the air distributor 30.
- the coating product flows through the space 11 .4 and spreads over the flow surface 11 to the edge 12 where it is sprayed into fine droplets.
- the means 3 for injecting air which comprise the air duct
- the air 20 and the air distributor 30, are supplied with compressed air that they drive and distribute in the central region 1 1.3.
- the air supply is maintained as long as the bowl is fed with coating material.
- the air thus injected then flows downstream of the bowl 1 and then mixes with the jet of sprayed coating product.
- the air thus injected thus makes it possible to compensate for the depression existing downstream of the bowl 1.
- a brief initial phase may consist in delivering the compressed air into the air duct 20 and into the air distributor 30 before dispensing the paint into the duct 21. This initial phase avoids the rise of paint on and in the air distributor 30.
- the air ejected through the channels 32 and 34 is directed to the flow surface 11, which contributes to the spreading or rolling of the coating product film on the flow surface 11.
- the air thus injected in the central region 11.3 limits the returns of coating product inside the flow surface 1 1 and on the downstream face 37 of the air distributor 30, which reduces the contamination of the bowl 1, so the amount of solvent needed for cleaning.
- FIG. 8 shows a graph illustrating, as a function of skirt airflow
- a curve Co represents the robustness curve of the impact width W50 of a rotary projector of the prior art
- a curve C 3 represents the robustness curve of a rotating projector according to the invention, c that is to say comprising means 3 for injecting air into the volume delimited by the flow surface 11.
- Each of the curves C 0 and C 3 has an area where the impact width W 50 evolves discontinuously. These zones are denoted Z 0 and Z 3 respectively for the curves Co and C 3
- the zones Z 0 and Z 3 are said to be "non-robust” because the impact width W 50 evolves therein discontinuously when the flow rate is modified. skirt air SA, so that the non-robust areas Z 0 and Z 3 are not exploitable to achieve the spraying coating product.
- the non-robust zone Z 3 with air injection in the center of the bowl 1, represents a relatively small variation of the impact width W50, while the robust zone Z 0 , without air injection in the center of the bowl 1, represents a greater variation of the W50 impact width.
- a rotating projector P according to the invention thus reduces the amplitude of the non-robust zone Z 0 and bring it back to the non-robust zone Z 3 .
- the decrease in this amplitude is shown in FIG. 8 by the zone Z 0 - Z 3 which represents a variation of the diameter W 50 of approximately 200 mm. Therefore, the variations of the width of impact W50 following the curve
- C 3 are lower, which allows the application of coating product revoilage, for superimposing a thin layer of coating product on an already applied base layer.
- Revoiling is an application in which the Skirt airflow is relatively low and the rotation speed of the bowl is relatively high.
- FIG. 3 illustrates a second embodiment of the invention, in which the bowl 1 is identical to the bowl 1 of FIG. 2.
- the description of the bowl 1 given above in relation with FIG. 2 can therefore be transposed to the bowl. 1 of FIG. 3.
- Elements of the rotating projector of FIG. 3 that are similar to or corresponding to those of the rotating projector P have the same numerical references increased by 100.
- a duct represented by its downstream section 122 is defined. 120 air and a pipe 121.
- the rotating projector partially illustrated in FIG. 3 differs from the rotating projector P of FIG. 2 by the structure of the feed means of the bowl 1 in FIG. coating product and their position relative to the means for injecting air into the center of the bowl 1.
- the downstream section of the duct 122 comprises the air duct 120 which is identical to the air duct 20 of the downstream section 22 of the duct 24.
- the air duct 120 is coaxial with the axis Xi.
- the means 3 for injecting air, which comprise the air duct 120 and the air distributor 30, are therefore identical to the means 3 illustrated in FIG.
- the air leaving the pipe 120 enters the common chamber 31 of the distributor 30 through an opening 35 formed on the upstream side of this distributor.
- the section 122 differs from the downstream section 22 of the duct 24 in that the coating product supply means comprises the duct 121 which has a tubular shape extending around the air duct 120 and coaxially with the duct. Xi axis, while the pipe 21 consists of a single hole eccentric to the axis Xi.
- the tubular shape of the pipe 121 makes it possible to evenly distribute the coating product on the circumference of the air distributor 30 and in the space separating the upstream face 33 of the air distributor 30 and the downstream face 123 of the pipe duct 122.
- the pipe 121 may comprise, like the pipe 21 described above in connection with Figure 2, a bore extending parallel to the air duct, therefore to the axis of rotation, and eccentrically in the channeler.
- FIG. 4 illustrates a bowl 101 according to a third embodiment of the invention, in which the downstream section 122 of the pipe is identical to the section 122 of FIG. 3 and the bowl 101 similar to the bowl 1.
- the description of the bowl 1 and the section 122 given above in relation to Figure 3 can be transposed to the bowl 1 and the section 122 of Figure 4, taking into account the differences set out below.
- Elements of the rotating projector of FIG. 4 which are similar or corresponding to those of the rotating projector P bear the same numerical references increased by 100.
- the bowl 101 differs from the bowl 1 because it comprises an air distributor 130 whose shape and the number of channels differ from those of the air distributor 30.
- the other characteristics of the air distributor 130 are identical to the corresponding characteristics of the air distributor 130.
- the pipe 1 20 of the section 1 22 and the air distributor 130 together form means 103 for injecting air into a central region of the bowl 101 situated radially inside its flow surface 11.
- the air distributor 130 differs from the air distributor 30 in that its downstream axial surface 137 is curved and convex, in this case in the form of a sphere portion, while it is flattened in the case of the downstream axial surface 37.
- the shape of the air distributor 130 makes it possible to produce an air distribution different from the distribution obtained with the air distributor 30, which may be useful depending on the application. desired.
- the downstream axial surface of the air distributor 30 may be curved and concave, that is to say hollow.
- the air distributor 130 has more channels 132, 134, 136 and 138 than the air distributor 30.
- the distribution of the channels 132, 134, 136 and 138 is similar to the distribution of the channels 32, 34 and 36 which has been described above in connection with FIG. 2.
- FIG. 5 illustrates a bowl 201 according to a fourth embodiment of the invention, in which the downstream section 122 of the pipe is identical to the section 122 of FIG. 3.
- the description of the bowl 1 and the pipe 122 given above in relation to FIG. 3 can be transposed to the bowl 201 and the section 122 of FIG. 5, taking into account the differences set out below.
- Elements of the rotary projector of FIG. 5 that are similar to or corresponding to those of the rotating projector P have the same numerical references increased by 200.
- a flow surface 211, an edge 212, an external surface 213, a dispenser are defined.
- the flow surface 21 1, the edge 212 and the outer surface 213 are identical, respectively to the flow surface 11, to the edge 12 and to the outer surface 13.
- the bowl 201 differs from the bowl 1 by the structure and the number of channels of its air distributor 230.
- the channels 232 and 234 are in fact machined in a downstream portion 239 of the distributor 230 which is projecting with respect to the downstream axial surface 237.
- the downstream axial surface 237 is therefore partially flat, because it is composed of a flat crown and a projecting and frustoconical portion.
- the common chamber 231 extends to this projecting portion. A large flat portion of the downstream axial surface 237 is thus disengaged from the channels 232 and 234.
- the downstream end of the section 222 enters the common chamber 231, through the opening 235, with a radial clearance, which forms a baffle locally generating pressure losses that limit the rise of paint in the air distributor 230
- the upstream axial surface 235.2 is provided with a frustoconical rim or bead 235.1 which abuts radially on the outside, the opening 235 and the chamber 231.
- the other characteristics of the air distributor 230 are identical to the corresponding characteristics of the air distributor 30 and 130, in particular the outer surface 230.1 of the air distributor 230 has a frustoconical shape.
- the air distributor 230 makes it possible to produce a more localized air distribution in the center of the central region 211.3 than the air distributor 30 or 130 allows.
- FIG. 6 illustrates a bowl 301 according to a fifth embodiment of the invention.
- the description of the bowl 1 and the pipe 24, in particular of its downstream section 22, given above in relation to FIG. 1, can be transposed, in FIG. 6, to the bowl 301 and to the pipe represented by its downstream section 322. taking into account the differences set out below.
- Elements of the rotary projector of FIG. 6 that are similar to or corresponding to those of the rotating projector P have the same numerical references increased by 300.
- a flow surface 311, upstream portions 311.1 and downstream portions 311.2, a central region 311.3 are defined.
- the air distributor 330 has channels 332, 334 similar to the channels 232, 234 of the bowl 201.
- the air distributor 330 differs from the distributors 30, 130 and 230 in that it is disjointed from the bowl 301 and fixed relative to the fixed body of the rotating projector.
- the air distributors 30, 130 and 230 are respectively integral with the bowls 1, 101 and 201, so that the air distributors 30, 130 and 230 rotate around the axes X 1, X 10 1 and X 2 o 1, by relative to the fixed body of the rotating projector P.
- the air distributor 330 is made at a downstream portion of the air duct 320.
- the air distributor 330 is machined in the downstream portion of the duct. section 322 so as to form a projection through the upstream opening 314 of the bowl 301 and in the central radial portion of the bowl 301.
- the air distributor 330 and the section 322 are therefore made of material.
- the air distributor can be attached to the pipe by screwing, gluing or the like.
- the pipe 320 and the chamber 331 are in line with each other and are connected at an opening 335, which is in fact constituted by an inner subassembly zone 322-330.
- the air thus enters the pipe 320 into the chamber 331 through the opening 335.
- the bowl 301 further comprises a distributor 340 which fulfills the function of distribution of the coating product on the upstream portion 31 1 .1 of the flow surface 311.
- the distributor 340 is integral with the bowl 301 and rotates with it around the X axis 30 i.
- the distributor 340 has an external surface 340.1 which defines, with the upstream portion 31 1 .1, a passage 31 1 .4 for the coating product.
- the air distributor 330 has side channels 333.
- the side channels 333 extend radially and are distributed about the axis X301. Air flows through side channels 333 to an annular gap 339 between dispenser 330 and manifold 340 so that paint does not flow into gap 339.
- the upstream axial surface 335.2 is provided with a rim or frustoconical bead
- the means for injecting air comprises the bore which defines the gap 339, since the air distributor 330 injects the air also through this bore.
- the means for injecting air are distinguished from the paint supply means which are formed by the distributor 340.
- the air distributor 330 makes it possible to produce static air jets, as opposed to the dynamic or rotary air jets produced by the air distributors 30, 130 and 230.
- Static air jets have the advantage that they 'to be particularly directive and have a local impact relatively more important than dynamic jets.
- FIG. 7 illustrates a bowl 401 according to a sixth embodiment of the invention.
- the description of the bowl 301 and the downstream duct section 322 given above in relation to FIG. 6 can be transposed, in FIG. 7, to the bowl 401 and the duct represented by its downstream section 422, taking into account the differences below.
- Elements of the rotary projector of FIG. 7 that are similar or corresponding to those of the rotary projector of FIG. 6 bear the same numerical references increased by 400.
- a flow surface 41 1 an edge 412, an external surface 413, an air distributor 430, a common chamber 431, channels 432 and 434, an opening 435 to access the chamber 431 and a distributor 440.
- the pipe 420 of the section 422 and the air distributor 430 together form means 403 for injecting air into a region of the bowl 401 located radially inside the flow surface 411.
- One (or more) pipes not shown allows the supply of the bowl 401 coating product.
- Each duct extends in the section 422 and opens upstream of the distributor 440.
- Each duct may be similar to a duct 21, 121, 221 or 321 as described above, that is to say rectilinear and parallel to the axis X 40 I or tubular and coaxial with the axis X 4 Oi -
- the air distributor 430 comprises a nozzle which is fixed at the extrem ity of the section 422.
- the air distributor 430 comprises a tubular-shaped upstream portion which is screwed into the pipe 420 whose downstream end portion is threaded 433.
- the distributor Air 430 is easily removable and cleanable because it has a twist-off tip.
- the tip can be fixed in the duct by fins.
- the air distributor 430 is disjointed from the bowl 401 and fixed relative to the fixed body of the rotating projector.
- the air distributor 430 has a channel 434 similar to the channel 334 of the bowl 301.
- the downstream portion of the air distributor 430 has a frustoconical shape in the center of which is drilled the channel 434 along the X axis 40I .
- the air supplying the channel 434 comes from the common room 431.
- An interstitial space or clearance, is provided between the frustoconical surface of the air distributor 430 and the coincident terminal surface of the section 422.
- This interstitial space forms a channel 432 of lamellar shape extending around the axis X 40 I
- the air reaches the channel 432 via several radial bores, of which three are visible in Figure 7 with the references 437, 438 and 439.
- the radial bores 437 and 438 extend in the radial direction Y 40 i contained in the plane of FIG. 7.
- These radial bores 437, 438 and 439 are made in the tubular-shaped upstream portion of the air distributor 430 and open into an annular chamber 428 which is formed in the duct 422.
- the nozzle forming the air distributor 430 makes it possible to inject a stream of lamellar air into the region situated radially inside the flow surface 411.
- the pipe for the coating product and the air duct can be machined in two different parts assembled by conventional fastening means.
- the air injected at the center of the bowl can be replaced by any other harmless and neutral gas vis-à-vis the coating product, such as nitrogen.
- the air distributor or equivalent is arranged in the volume delimited by the upstream portion, 1.1 or equivalent, of the flow surface, or equivalent, of the bowl.
- the air distributor 30 or equivalent is inscribed in the volume defined by the flow area, 11 or equivalent, of the bowl. This location of the dispenser allows it to effectively distribute the air both to the flow surface and to the center of the bowl, which allows in particular to fill a possible depression in the central region of the bowl or downstream of this region. The robustness of the impact and the deposit efficiency are improved.
Landscapes
- Nozzles (AREA)
- Electrostatic Spraying Apparatus (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0953139A FR2945461B1 (fr) | 2009-05-13 | 2009-05-13 | Projecteur et organe de pulverisation de produit de revetement et procede de projection mettant en oeuvre un tel projecteur. |
PCT/FR2010/050925 WO2010130955A1 (fr) | 2009-05-13 | 2010-05-12 | Projecteur et organe de pulverisation de produit de revetement et procede de projection mettant en oeuvre un tel projecteur |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2429716A1 true EP2429716A1 (fr) | 2012-03-21 |
EP2429716B1 EP2429716B1 (fr) | 2015-10-14 |
Family
ID=41478717
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10728750.0A Active EP2429716B1 (fr) | 2009-05-13 | 2010-05-12 | Projecteur et organe de pulverisation de produit de revetement et procede de projection mettant en oeuvre un tel projecteur |
Country Status (10)
Country | Link |
---|---|
US (1) | US8905324B2 (fr) |
EP (1) | EP2429716B1 (fr) |
JP (1) | JP2012526651A (fr) |
KR (1) | KR101721118B1 (fr) |
CN (1) | CN102421532B (fr) |
BR (1) | BRPI1007647B1 (fr) |
ES (1) | ES2551170T3 (fr) |
FR (1) | FR2945461B1 (fr) |
RU (1) | RU2514984C2 (fr) |
WO (1) | WO2010130955A1 (fr) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5829555B2 (ja) * | 2012-03-07 | 2015-12-09 | 本田技研工業株式会社 | 静電塗装装置及び静電塗装方法 |
EP2772584A1 (fr) * | 2013-02-27 | 2014-09-03 | Valmet Technologies, Inc. | Procédé et agencement pour une ligne de production de bande de fibre |
FR3009688B1 (fr) * | 2013-08-13 | 2017-03-03 | Sames Tech | Pulverisateur d'un produit de revetement liquide et installation de pulverisation comprenant un tel pulverisateur |
CN103742456B (zh) * | 2013-12-20 | 2016-08-17 | 江苏大学 | 一种回旋式真空扩散泵 |
CA2937837C (fr) * | 2014-01-29 | 2019-08-06 | Honda Motor Co., Ltd. | Dispositif de revetement par atomisation rotatif et tete de pulverisation |
DE102014019309A1 (de) * | 2014-12-20 | 2016-06-23 | Eisenmann Se | Düsenkopf und Rotationszerstäuber mit einem solchen |
FR3048896B1 (fr) * | 2016-03-21 | 2018-04-13 | Exel Industries | Pulverisateur de produit de revetement, procede de montage et de demontage |
FR3055106A1 (fr) * | 2016-08-20 | 2018-02-23 | Sprai | Dispositif d'injection du liquide pour atomiseur a disque rotatitf |
CN106481055B (zh) * | 2016-11-28 | 2018-11-06 | 重庆瑞恩涂料有限公司 | 一种双管防飞溅涂料喷涂装置 |
CN108180582A (zh) * | 2017-12-28 | 2018-06-19 | 浙江工贸职业技术学院 | 一种加湿器 |
KR102276493B1 (ko) * | 2018-10-22 | 2021-07-12 | 김유경 | 농업용 스프링클러 |
CN110961293B (zh) * | 2020-01-16 | 2020-11-03 | 三门宣教机械设备有限公司 | 一种自适应管道喷涂装置 |
KR102716871B1 (ko) * | 2022-11-25 | 2024-10-16 | 아주대학교산학협력단 | 관내 연마용 샌드블라스팅 노즐 |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0632818Y2 (ja) * | 1988-07-05 | 1994-08-31 | チロン・ジャパン株式会社 | 低圧噴霧銃 |
FR2717106B1 (fr) * | 1994-03-11 | 1996-05-31 | Total Raffinage Distribution | Procédé et dispositif de pulvérisation d'un liquide, notamment d'un liquide à haute viscosité, à l'aide d'au moins un gaz auxiliaire. |
JP2530574B2 (ja) * | 1994-03-30 | 1996-09-04 | 旭サナック株式会社 | エア―スプレイガン用アタッチメント |
JP3248361B2 (ja) | 1994-09-09 | 2002-01-21 | トヨタ自動車株式会社 | 回転霧化静電塗装装置 |
JPH08155349A (ja) * | 1994-11-30 | 1996-06-18 | Trinity Ind Corp | 静電塗装方法及びそれに使用する静電塗装機 |
JP3205505B2 (ja) * | 1996-04-19 | 2001-09-04 | エービービー株式会社 | 回転霧化頭型塗装機 |
US6050499A (en) * | 1996-12-03 | 2000-04-18 | Abb K. K. | Rotary spray head coater |
US6189804B1 (en) * | 1998-03-27 | 2001-02-20 | Behr Systems, Inc. | Rotary atomizer for particulate paints |
CH693822A5 (fr) * | 1999-07-07 | 2004-02-27 | Marcel Leisi | Tête de pulvérisation. |
FR2805182B1 (fr) * | 2000-02-21 | 2002-09-20 | Sames Sa | Dispositif de projection de produit de revetement comprenant un element rotatif de pulverisation |
FR2836638B1 (fr) * | 2002-03-01 | 2004-12-10 | Sames Technologies | Dispositif de pulverisation de produit de revetement liquide |
JP2004321844A (ja) * | 2003-04-21 | 2004-11-18 | Ransburg Ind Kk | 回転霧化型塗装機 |
JP4428973B2 (ja) * | 2003-09-10 | 2010-03-10 | トヨタ自動車株式会社 | 回転霧化塗装装置および塗装方法 |
JP4750803B2 (ja) * | 2006-01-19 | 2011-08-17 | Abb株式会社 | 回転霧化頭型塗装装置 |
DE102007012878B3 (de) * | 2007-03-17 | 2008-10-30 | Apson Lackiertechnik Gmbh | Zerstäuber zum Zerstäuben eines Beschichtungsmittels |
US8602326B2 (en) * | 2007-07-03 | 2013-12-10 | David M. Seitz | Spray device having a parabolic flow surface |
-
2009
- 2009-05-13 FR FR0953139A patent/FR2945461B1/fr not_active Expired - Fee Related
-
2010
- 2010-05-12 RU RU2011150513/05A patent/RU2514984C2/ru active
- 2010-05-12 BR BRPI1007647A patent/BRPI1007647B1/pt not_active IP Right Cessation
- 2010-05-12 ES ES10728750.0T patent/ES2551170T3/es active Active
- 2010-05-12 CN CN201080020576.4A patent/CN102421532B/zh not_active Expired - Fee Related
- 2010-05-12 US US13/320,249 patent/US8905324B2/en not_active Expired - Fee Related
- 2010-05-12 JP JP2012510349A patent/JP2012526651A/ja active Pending
- 2010-05-12 KR KR1020117029396A patent/KR101721118B1/ko active IP Right Grant
- 2010-05-12 WO PCT/FR2010/050925 patent/WO2010130955A1/fr active Application Filing
- 2010-05-12 EP EP10728750.0A patent/EP2429716B1/fr active Active
Non-Patent Citations (1)
Title |
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See references of WO2010130955A1 * |
Also Published As
Publication number | Publication date |
---|---|
RU2011150513A (ru) | 2013-06-20 |
KR20120014581A (ko) | 2012-02-17 |
BRPI1007647B1 (pt) | 2020-06-09 |
CN102421532A (zh) | 2012-04-18 |
CN102421532B (zh) | 2015-07-15 |
US8905324B2 (en) | 2014-12-09 |
JP2012526651A (ja) | 2012-11-01 |
FR2945461B1 (fr) | 2012-10-05 |
EP2429716B1 (fr) | 2015-10-14 |
FR2945461A1 (fr) | 2010-11-19 |
WO2010130955A1 (fr) | 2010-11-18 |
KR101721118B1 (ko) | 2017-03-29 |
US20120118996A1 (en) | 2012-05-17 |
BRPI1007647A2 (pt) | 2016-02-23 |
ES2551170T3 (es) | 2015-11-16 |
RU2514984C2 (ru) | 2014-05-10 |
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