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
  • B05B3/1035—Driving means; Parts thereof, e.g. turbine, shaft, bearings
  • B05B3/1042—Means for connecting, e.g. reversibly, the rotating spray member to its driving 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
  • 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 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 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
  • B05B3/1035—Driving means; Parts thereof, e.g. turbine, shaft, bearings

Definitions

• the invention relates to a spray bowl for a rotary coating product sprayer.
• the invention also relates to a coating product projection device comprising such a bowl, as well as to a coating product projection installation incorporating such a device.
• Known devices include one or more magnets together constituting an annular magnetization device. This requires this or these magnets to be large enough to generate an intense magnetic field, which affects the compactness of the projector.
• the weight and inertia of the bowl are relatively large, especially in the case where the bowl carries the permanent magnet (s).
• the magnets must be subject to a special mechanical assembly so that they do not risk bursting under the effect of centrifugal forces.
• the invention more particularly intends to remedy, by proposing a spray bowl which can be easily driven by a rotor provided for this purpose, thanks to an effective magnetic coupling, while allowing assembly and disassembly. easy to bowl, at the start and end of service.
• the invention relates to a spray bowl for a rotary sprayer of coating product, this bowl being equipped with magnetic coupling means with a rotary drive member or with a housing surrounding this member, characterized in that these magnetic coupling means are able to cooperate with complementary means carried by the drive member or by the housing, in such a way that the magnetic coupling force obtained has a radial component relative to the axis of rotation of this bowl.
• the effort of the magnetic coupling obtained is effective, while the coupling means provided on the bowl participate in the magnetic coupling between the bowl and the drive member or the housing, including during movements of installation or dismantling of the bowl relative to the projector, which gives satisfactory progressiveness to the effort to be overcome or accompanied by the operator on this occasion.
• a projector spray bowl can incorporate one or more of the features of any of claims 2 to 8.
• the invention also relates to a device for spraying a coating product which comprises a bowl and a member capable of driving this bowl, magnetic coupling means including at least one permanent magnet being provided between the bowl and the aforementioned member or between the bowl and a housing surrounding this member.
• This device is characterized in that the coupling means are arranged in such a way that the magnetic coupling force has a radial component relative to the axis of rotation of the bowl.
• the magnetic coupling means further comprise at least one magnetic body associated with the magnet and mounted on one of the two elements that are the bowl and the driving member or the bowl and housing, while the other element carries at least one rib formed in a magnetic material.
• the ribs constitute the induced poles of a magnetic coupling device whose magnetic bodies associated with the magnets form the inducing poles.
• the thickness of the rib (s) is substantially equal to the thickness of the magnetic bodies.
• the relative spacing of these ribs are advantageously substantially equal to, or substantially correspond to a multiple or a sub-multiple of one relative spacing of magnetic force.
• the positioning and the geometry of these ribs are thus adapted as a function of the positioning and the geometry of the polar masses formed by the magnetic bodies, in order to optimize the desired coupling effect.
• These ribs allow a concentration of the electromagnetic field at their level, hence an improvement in the magnetic coupling obtained.
• a projection device can incorporate the features of one of claims 13 to 21.
• the invention finally relates to a coating product spraying installation, which comprises at least one spraying device as described above.
• FIG. 1 is a longitudinal section in principle of a coating product sprayer in accordance with a first embodiment of the invention, incorporating a bowl in accordance with a first embodiment and forming part of an installation in accordance with the invention;
• - Figure 2 is a longitudinal section of the rotor and a side view of the bowl of the device of Figure 1;
• - Figure 3 is a perspective view with partial cutaway of the elements shown in Figure 2;
• FIG. 4 is an enlarged view of detail IV in Figure 1;
• Figure 4A is a vector representation of the magnetic coupling force in the configuration of Figure 4;
• FIG. 5 is a view similar to Figure 2 for a projection device and a bowl according to a second embodiment of the invention
• FIG. 6 is a view similar to Figure 2 for a projection device and a bowl according to a third embodiment of the invention
• FIG. 7 is a longitudinal section in principle of a device according to a fourth embodiment of the invention.
• FIGS. 1 to 4 is intended to be supplied with coating product from one or more sources S and moved, for example with an essentially vertical movement represented by the double arrow Fi, opposite of objects O to be coated within an installation I for coating these objects.
• the headlight P comprises a turbine of which only the central part 1 is shown which includes a rotor 11 and which is surrounded by a protective cover 2.
• a bowl 3 is intended to be mounted on the rotor 11 and rotated by the latter, around an axis XX ′, at a speed of several tens of thousands of revolutions per minute, for example 80,000 revolutions / minute, so that the coating material from source S is sprayed towards an object 0, as shown by the arrows F 2 .
• the projector P can be of the electrostatic type, that is to say comprise means for electrostatic charging of the coating product before or after it has been discharged from the edge 31 of the bowl 3.
• the bowl 3 is formed of two parts, namely a hub 32 and a portion 33 forming a cup which defines a surface 34 for flow and distribution of the coating product in the direction of the edge 31.
• the hub 32 is hollow and defines a longitudinal channel 35 which is centered on an axis X 3 -X ' 3 which coincides with the axis XX' when the bowl 3 is mounted on the rotor 1.
• This channel 35 communicates through radial openings 35a with the surface 34.
• the hub 32 constitutes a male part of the bowl 3 which is intended to be introduced into a housing 12 of the rotor 11 centered on the axis XX ′ and which extends a channel 15 for supplying the bowl 3 with coating product.
• An injection pipette 4 can be provided in the channel 15 as shown, in phantom only in Figure 1.
• the channel 15 communicates with the housing 12 through an area 16 of reduced diameter.
• a cartridge 5 comprising four annular magnets 51 with parallelepiped section and five magnetic bodies 52 interposed between two adjacent magnets 51 and arranged on either side of the exterior magnets.
• the bodies 52 can be made of any suitable material, for example steel.
• the magnets 51 all have substantially the same width Isi taken in a radial direction relative to the axis XX '.
• the magnetic bodies 52 have a width .52 # measured in the same direction, which increases from the side 53 of the cartridge 5 facing outwards from the rotor 1 towards the conduit 15.
• a sealed and non-magnetic partition 54 is disposed in abutment on the edges 52a of the bodies 52 projecting relative to the magnets 51 in the direction of the axis XX ′, this partition making it possible to protect the magnets against mechanical and chemical attack. 51.
• the partition 54 comprises a first cylindrical part 54 ⁇ with circular base and centered on the axis XX 'and a second part 54 2 frustoconical and divergent towards the side 53 of the cartridge 5, that is to say in the direction of the outlet 12a of the housing 12 facing the outside of the rotor 1.
• the part 54 2 of the partition 54 is extended by the internal radial surface 55 x of a wedge 55, the half opening angle 55 of the frustoconical surface 55 ⁇ being greater than the half opening angle ⁇ 54 of the internal surface of part 54 2 .
• edges 52a of the bodies 52 which project with respect to the elements 51 are bevelled to conform to the shape of the external surface of the partition 54.
• the cartridge 5 defines a volume V 5 for receiving the hub 32 of the bowl 3.
• This volume V 5 is delimited by the internal surface of the part 54 2 which corresponds to a geometrical surface S 5 frustoconical and half -angle at the top ⁇ 5 .
• the external radial surface 32a of the hub 32 is provided with four ribs 36 which are integral with the hub 32, itself made of a magnetic material, such as steel. These ribs form external radial flanges relative to the hub 32 and, with the exception of the rib 36 closest to the free end 32b of the hub 32, have their respective frustoconical external radial surfaces and inscribed in a geometric surface S 3 centered on the longitudinal axis X 3 -X ' 3 , converging in the direction of the free end 32b of the part 32 and of half angle at the apex ⁇ 3 .
• the value of the half angle ⁇ 3 is chosen to be equal to the value of the half angle ⁇ 54 .
• the force E of magnetic coupling obtained when the bowl is mounted on the rotor 11 and ready to turn, has an axial component E x , which is not zero and parallel to the axis XX 'of rotation of the bowl 3 and a component E 2 radial with respect to this axis and also non-zero. This effort is exerted between the elements 52 and 36, through the partition 54.
• the component E 2 has an intensity greater than that of the component Ei, which is to approximate the value of the half-angle ⁇ 54 and the relative position of the elements 52 and 36 in the mounted configuration of the bowl 3.
• the thickness e 3S of the ribs 36 taken parallel to the axis X 3 -X ' 3 is substantially equal to the thickness e 52 of the magnetic bodies 52, while the spacing d between the ribs 36 is substantially equal to the spacing of two bodies 52, that is to say the thickness e 51 of a magnet 51 taken parallel to the axis XX '.
• the magnets 51 are identical to each other, while the bodies 52 all have the same thickness, their width taken perpendicular to the axis XX ′ being variable as explained above.
• the circumferential ribs or collars 36 participate in the closing of the magnetic field created by the magnets 51 and which is propagated by the magnetic bodies 52.
• the offset ⁇ is gradually increased and the magnetic coupling force decreases progressively, which avoids sudden movements and the risks for the operator of escaping the bowl 3
• the relative values of the components Ei and E 2 may vary from one another.
• the ribs 36 are produced by surface machining of the surface 32a of the hub 32. According to a variant not shown of the invention, these ribs or collars could be formed by rings added to the hub 32.
• the bowl is devoid of magnets, which makes it particularly attractive economically.
• An O-ring 6 is mounted in the zone 16 of reduced diameter and receives in support the part 54 ⁇ of the partition 54, which makes it possible to isolate even more perfectly the compartment of the cartridge 5 which encloses the magnets with respect to the passage volume coating and / or cleaning products.
• the partition 54 may not extend to the level of the zone 16, in which case the seal 6 abuts against the end portion of the hub 32. It can then be provided that the zone 16 is slightly conical so as to to facilitate assembly.
• radial grooves of the gear tooth type, can be machined or attached to the internal radial surface of the cartridge 5 and to the hub 32, this in order to ensure the holding of the bowl , and in particular to limit the radial and / or tangential sliding thereof with respect to the magnets, during transient acceleration or deceleration regimes.
• the rotor 111 of this embodiment also forms a supply channel 115 in coating products of a bowl 103 which comprises a hub 132 and a portion 133 provided with an edge 131 of spray. Magnets 137 are mounted around the hub 132 and are separated in pairs by a magnetic body 136 constituted by ribs or rings attached to the hub 132.
• a cartridge 105 is mounted in a housing 112 formed at the outlet of the channel 115 and comprises a magnetic ring provided with internal ribs or collars 152 whose thickness and spacing, taken parallel to the direction of the axis XX 'of rotation of the rotor 101, are respectively equal to the thickness and the spacing of the bodies 136, taken parallel to the central axis X ⁇ o3-X' ⁇ o 3 of the bowl 103.
• This embodiment corresponds in practice to the first embodiment to which a structural inversion has been applied between the part carrying the magnets, here the bowl 103, and the part equipped with ribs constituting the induced poles of magnetic coupling, here the rotor 111 .
• the volume V ⁇ 05 for receiving the hub 132 in the housing 112 diverges in the direction of the outlet 112a of this housing and the geometry of the surfaces respectively defining this volume and the external envelope of the hub is chosen to allow surface support of the hub in the cartridge.
• the rotor 211 of this embodiment also forms a supply channel 215 in coating product of a bowl 203 which comprises a hub 232 and a part 233 provided with a spraying edge 231.
• the rotor 211 is equipped with a hollow central shaft 217 on which are mounted magnets 251 separated by bodies 252 magnetic and in the center of which extends the channel 215 in the form of a channel 217b of reduced diameter. This channel 217b makes it possible to supply the bowl 203 with coating and / or cleaning products.
• the hub 232 forms a housing 212 for receiving the shaft 217 when the bowl 203 is mounted on the rotor 211.
• the internal surface of the hub 232 is provided with ribs 236 which extend in the direction of the axis X 2 o3- ' 2 o3 and are intended to be approximately aligned with the bodies 252 to constitute the poles induced by the elements 251 and 252 when a magnetic coupling is obtained between the elements 211 and 203.
• the magnetic coupling force obtained has a radial component with respect to the axis XX '.
• a watertight and non-magnetic partition 238 can be mounted bearing on the ribs 236 and its internal surface S e is divergent in the direction of the opening 212a of the housing
• the thickness of the ribs 236 is chosen to be substantially equal to the thickness of the bodies 252 taken parallel to the axis XX ′, their relative spacings also being substantially equal.
• the rotor 311 of this embodiment also forms a supply channel 315 of a bowl 303 which comprises a hub 332 intended to be introduced into a housing 360 defined in the center of an annular cartridge 305 fixed on the front face 301a of a housing 301 in which the rotor 311 can rotate around its central axis XX '.
• the cartridge 305 comprises three magnets 351 as well as four ferromagnetic bodies 352 in the form of washers, these bodies 352 being intended to be approximately aligned with external radial ribs 336 formed on the external radial surface of the means 332.
• the magnets 351 and the washers 352 are circular and centered on the axis XX '.
• the North and South polarities of the magnets 351 are opposite two by two, as in the previous embodiments.
• the ribs 336 could also be attached to the hub 332.
• a magnetic force is exerted between the elements 305 and 332, the field lines tending to close through the elements 352 and 336.
• This force has a radial component.
• the hub 332 is hollow and provided with an internal radial surface 338 which is frustoconical and against which abuts the frustoconical front end 311a of the rotor 311, which allows the bowl 303 to be fitted onto the rotor 311, the way of a walrus cone.
• the elements 336 and 352 are not completely aligned in the mounted configuration of the bowl, such as represented in FIG. 7, so that the magnetic coupling force generated also has a component directed towards the left in FIG. 7, which tends to press the bowl 303 firmly onto the rotor 311.
• a cylindrical air gap with a circular base exists between the set of magnets 351 and the ribs 336.
• the bowl fixing force As a function of its size, its weight and its speed of rotation, by varying the number of magnets of the cartridge 305.
• the particular advantages of this embodiment are the low mass of the rotating parts and the simplicity of implementation.
• elements similar to those of the first embodiment bear identical references increased by 400.
• the magnets 451 and the magnetic bodies 452 are arranged in a frustoconical configuration, the bowl 403 having, meanwhile, a hub 432 whose outer surface is frustoconical and converging towards the rear of the rotor 411, this surface being equipped with ribs 436 intended to be, approximately at least, in alignment with the bodies 452.
• An advantage of this embodiment is that it makes it possible to obtain a fixing force calibrated in intensity by eliminating a possible "magnetic catch" effect which may displease the operator.
• the taper of the magnets 451 is chosen to be sufficient for the successive air gaps to be greater than the attraction distance, up to the mounted position of the bowl 403, the quality of the magnets and the precision of the assembly making it possible to define this taper.
• This embodiment also has the advantage of good compactness in the direction of the axis XX 'and of a possibility of pre-positioning the bowl 403 in the front end 411a of the rotor 411 during assembly.
• the relative spacing of the ribs 36 and the like can be chosen equal to a submultiple of the width l_s ⁇ of the magnets 51, that is to say of the relative spacing of the magnetic bodies 52 and equivalent. Indeed, an alignment of certain ribs 36 or equivalent with the bodies 52 and the like remains possible, certain other ribs then being located opposite the magnets 51. These other ribs are then not very functional for the desired magnetic coupling. This is applicable to all the embodiments envisaged.
• the spacing d can be equal to a multiple of the spacing of the bodies 52.
• certain bodies 52 are opposite an intermediate zone between two ribs 36 or equivalent.
• This can also be applied to all the embodiments envisaged.
• the invention has been shown with 3, 103 or 203 bipartite bowls. It is also applicable with a bowl, the product distribution part and the hub are one-piece.
• the representation of bowls 303 and 403 is very schematic. The invention is applicable regardless of the exact nature of the product, sprayed, liquid or pulverulent, water-soluble or not.
• the invention works with electrostatic headlights or not.
• the technical characteristics of the described embodiments can be combined with one another within the scope of the present invention.
• the magnetic elements are, once the bowl is mounted on the rotor, located inside the housings 12, 112, 212, 360 or equivalent, which induces three additional advantages compared to a construction as known from WO-A-01/162396, namely: - good axial compactness which is important because it is necessary to reduce the axial dimension of a sprayer as much as possible in order to correctly reach areas of an object to be coated with a small radius of curvature, such as car door trim. This improves the maneuverability of a robot and a sprayer incorporating the invention and reduces the resistant moment on the wrist.
• the invention is applicable regardless of the exact number of magnet (s) and rib (s) used, the number of rib (s) being, in practice, adapted to the number of magnet (s).

Landscapes

• Nozzles (AREA)
• Structures Of Non-Positive Displacement Pumps (AREA)
• Electrostatic Spraying Apparatus (AREA)
• Medicinal Preparation (AREA)
• Catching Or Destruction (AREA)
• Reciprocating Pumps (AREA)
• Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Applications Claiming Priority (5)

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Family Applications (1)

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• 2003
  • 2003-09-12 WO PCT/FR2003/002706 patent/WO2004024338A2/fr not_active Ceased
  • 2003-09-12 AU AU2003276336A patent/AU2003276336A1/en not_active Abandoned
  • 2003-09-12 DE DE60303049T patent/DE60303049T2/de not_active Expired - Lifetime
  • 2003-09-12 AT AT03795046T patent/ATE314151T1/de not_active IP Right Cessation
  • 2003-09-12 EP EP03795046A patent/EP1545792B1/de not_active Expired - Lifetime
  • 2003-09-15 US US10/661,776 patent/US7041173B2/en not_active Expired - Lifetime

Non-Patent Citations (1)

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