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EP3296022B1 - Coating device - Google Patents

Coating device Download PDF

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Publication number
EP3296022B1
EP3296022B1 EP17190768.6A EP17190768A EP3296022B1 EP 3296022 B1 EP3296022 B1 EP 3296022B1 EP 17190768 A EP17190768 A EP 17190768A EP 3296022 B1 EP3296022 B1 EP 3296022B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
product
gun according
passage
gun
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.)
Active
Application number
EP17190768.6A
Other languages
German (de)
French (fr)
Other versions
EP3296022A1 (en
Inventor
Tarik Bennani
Thibault Cognon
Romain Gaillet
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.)
Exel Industries SA
Original Assignee
Exel Industries SA
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 Exel Industries SA filed Critical Exel Industries SA
Publication of EP3296022A1 publication Critical patent/EP3296022A1/en
Application granted granted Critical
Publication of EP3296022B1 publication Critical patent/EP3296022B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/3033—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
    • B05B1/304—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve
    • B05B1/3046—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
    • B05B1/3405—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl
    • B05B1/341—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet
    • B05B1/3415—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with swirl imparting inserts upstream of the swirl chamber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
    • B05B1/3405—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl
    • B05B1/341—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet
    • B05B1/3468—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with means for controlling the flow of liquid entering or leaving the swirl chamber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/002—Manually-actuated controlling means, e.g. push buttons, levers or triggers
    • 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
    • B05B7/025—Nozzles having elongated outlets, e.g. slots, for the material to be sprayed
    • 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
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B05B7/0408—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing two or more liquids
    • 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
    • B05B7/0807—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 to form intersecting jets
    • B05B7/0815—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 to form intersecting jets with at least one gas jet intersecting a jet constituted by a liquid or a mixture containing a liquid for controlling the shape of the latter
    • B05B7/0823—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 to form intersecting jets with at least one gas jet intersecting a jet constituted by a liquid or a mixture containing a liquid for controlling the shape of the latter comprising a rotatable spray pattern adjusting plate controlling the flow rate of the spray shaping gas jets
    • 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
    • B05B7/10—Spray pistols; Apparatus for discharge producing a swirling discharge
    • 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
    • B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
    • B05B7/1209—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means for each liquid or other fluent material being manual and interdependent
    • B05B7/1218—With means for adjusting or modifying the action of the controlling means
    • 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
    • B05B7/06—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane
    • B05B7/062—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet
    • B05B7/066—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet with an inner liquid outlet surrounded by at least one annular gas outlet
    • 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
    • B05B7/0807—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 to form intersecting jets
    • B05B7/0815—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 to form intersecting jets with at least one gas jet intersecting a jet constituted by a liquid or a mixture containing a liquid for controlling the shape of the latter
    • 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
    • B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
    • B05B7/1254—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated
    • B05B7/1263—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated pneumatically actuated
    • B05B7/1272—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated pneumatically actuated actuated by gas involved in spraying, i.e. exiting the nozzle, e.g. as a spraying or jet 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
    • B05B7/24—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 with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/26—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device
    • B05B7/28—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device in which one liquid or other fluent material is fed or drawn through an orifice into a stream of a carrying fluid
    • B05B7/32—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device in which one liquid or other fluent material is fed or drawn through an orifice into a stream of a carrying fluid the fed liquid or other fluent material being under pressure

Definitions

  • the present invention relates to a device for rotating a fluid circulating inside a nozzle.
  • the invention applies to the nozzle of a spray gun for a coating product, whether manual or automatic.
  • a spray gun comprises a spray head with a head ring and the nozzle, which is disposed coaxially inside the head.
  • the nozzle comprises a liquid passage channel configured to be selectively closed by a needle movable in translation inside the nozzle. The movement of the needle regulates the opening of the passage of the coating product. Depending on the position of the needle, the coating material will be expelled from the nozzle with more or less flow.
  • the spray head disposed around the nozzle comprises two horns each crossed by a compressed air ejection duct.
  • Each duct is configured so that air is expelled radially towards the spray of coating material.
  • the latter is then atomized into fine droplets under the impact of high-pressure air jets.
  • too high a compressed air pressure leads to the formation of a mist which reduces the transfer rate of the gun, that is to say the ratio between the quantity of product sprayed by the gun and the quantity of product actually deposited on the part to be coated (overspray).
  • EP-A-1 391 246 discloses a solution for improving atomization without increasing the compressed air pressure.
  • This solution consists in accommodating, inside the central duct of the nozzle, a device for fragmenting the liquid flow.
  • This device comprises a housing, a seat for positioning the housing and a spacer piece.
  • the housing and the seat delimit product passage holes, arranged to impose sudden changes of direction to the flow of coating product, which disturbs the flow.
  • the flow is thus destabilized upstream of the outlet orifice and the product is ejected from the nozzle in a turbulent form, ie in part defragmented.
  • the drawbacks of this device are its inability to expand the spray, its manufacturing cost (three separate parts) and its assembly difficulties. In addition, this device is difficult to clean.
  • the invention more particularly intends to remedy by proposing a device for setting in rotation which is easier to manufacture, less expensive, and easier to mount inside the nozzle.
  • US 3,123,306 discloses to figures 3 and 4 a gun with a mixer provided with a helical groove.
  • US 2013/0288195 A1 discloses a nozzle for sandblasting with detergents and EP 2 383 043 A2 discloses a spray gun for a two-component product, which relates to a very particular technical field which is that of sprayers equipped with a mixer.
  • the invention relates to a gun for spraying a coating product according to claim 1.
  • the invention also relates, as a variant, to a spray gun for a coating product according to claim 2.
  • this gun can comprise the characteristics of claim 3.
  • the groove (s) and / or the hole (s) of the device give the liquid circulating inside the nozzle a helical direction around a spray axis.
  • the rotation upstream of the outlet orifice of the nozzle results in a widening of the spray.
  • the flow is destabilized, even turbulent, which makes it easier to atomize.
  • the device makes it possible to obtain a distribution of drops of finer size, without increasing the pressure and / or the flow rate of the atomizing air jets.
  • the device makes it possible to obtain a gun with an atomization fineness identical to that of the guns of the prior art, but with less compressed air consumption, and therefore better efficiency.
  • the coating material can be a liquid comprising one or more components or a powder material. It can be paint, primer, varnish, etc.
  • the gun 1 comprises a body 10, a gripping handle 11 and an actuating trigger 12 articulated on the body 10.
  • the gun 1 comprises a spray head 14 and a head ring 16 disposed around the head 14.
  • the head 14 and the head ring 16 are centered on a spray axis X-X '.
  • the spray head 14 can advantageously be pivoted about the axis XX 'to direct the spray in a substantially horizontal plane, as in the configuration of figures 1 to 3 , or in a substantially vertical plane, as in the configuration of figure 6 to 8 .
  • the head 14 is hollow. It comprises two protuberances 14a and 14b, more commonly called horns or ears, which are arranged diametrically opposed to one another.
  • the horns 14a and 14b project parallel to the axis XX 'relative to the rest of the head 14. They each define two orifices 140 for ejection of compressed air.
  • the orifices 140 are shaped to guide air jets in the direction of the spray axis X-X '. More precisely, the air jets issuing from the orifices 140 have a direction which is substantially radial and centripetal with respect to the spray axis XX 'of the gun.
  • the adjective “substantially” is understood to mean that there is a difference of a few degrees between a direction strictly radial to the axis XX ′ and the direction of the air jets.
  • the pistol depicted in the figure 1 is therefore a gun of the pneumatic type, using air jets for the formation of the spray.
  • a nozzle 2 is disposed coaxially inside the head 14.
  • the nozzle 2 is a standard spray gun nozzle. It is about a part with geometry of revolution around the axis X-X '.
  • the nozzle 2 comprises two coaxial parts 2a and 2b, the part 2a being arranged inside the part 2b.
  • the nozzle 2 delimits a duct 6 of passage for the product. Conduit 6 is located inside part 2a.
  • the nozzle 2 is a “flat jet” type nozzle, that is to say that it is a nozzle whose footprint takes the form of a stretched ellipse.
  • the nozzle 2 can be a nozzle of the “round jet” type, that is to say a nozzle whose imprint takes the form of a disc or a ring.
  • the duct 6 is configured to be selectively closed by a needle 22 movable axially in translation inside the nozzle 2.
  • the movement of the needle 22 is controlled by the trigger 12.
  • a return spring (not shown) enables the return to be made. needle in the closed position when the operator releases the trigger 12.
  • An upstream direction is defined as a direction oriented in the direction opposite to the flow of liquid and a downstream direction as a direction oriented in the direction of the flow.
  • upstream is directed to the right, while downstream is directed to the left.
  • the duct 6 comprises, from upstream to downstream, a first section 60, cylindrical, a second section 62, frustoconical, the passage section of which decreases from upstream to downstream, a third section 64, also frustoconical and whose section decreases from upstream to downstream and an ejection channel 66, of constant passage section.
  • the “size” of a nozzle corresponds to the diameter of the last section of passage of the fluid before ejection, that is to say in the example to the diameter d66 of the ejection channel 66.
  • the size of a nozzle varies between 0.4 mm (4 gauge nozzle) and 2.7 mm (27 gauge nozzle).
  • a plane P is defined as the sealing plane of the needle 22 inside the nozzle 2.
  • the plane P is perpendicular to the spray axis X-X '. As visible at the figure 3 , the plane P is disposed at the interface between the section 64 and the channel 66.
  • the nozzle 2 according to the invention has the advantage that the position of the sealing plane P along the axis XX 'is standard, c' that is to say that the nozzle 2 is compatible with an existing commercial needle, such as the needle 22. This makes it possible to guarantee the flow rate of the nozzle 2 and to limit the presence of dead volumes, liable to retain product and cause drops to form after closing the nozzle 2.
  • buttons 18 and 20, visible at the bottom. figure 1 are designed to interrupt the spraying of product and the use of compressed air, respectively.
  • a removable device 30 is immobilized inside the conduit 6.
  • the device 30 is designed for standard gun nozzles. This is a rotating device fluid circulating inside the conduit 6. It comprises a body 32, the envelope surface S32 of which has a circular section.
  • the envelope surface is defined as a surface enveloping the body 32. It is then possible to imagine the surface S32 as the surface of the body 32 when the latter is enveloped in a film of zero thickness.
  • the envelope surface S32 is centered on an axis X32 which coincides with the axis XX 'when the device 30 is in place inside the duct 6.
  • the device 30 is a machined metal part.
  • the device 30 can be made of plastic and can be produced by other means, such as by molding or by means of a 3D printer.
  • the envelope surface S32 of the body comprises a cylindrical part S32a and a frustoconical part S32b disposed downstream of the cylindrical part S32a.
  • the diameter of the frustoconical part S32b of the surface S32 decreases going downstream.
  • the angle of convergence A32b of the frustoconical part S32b is between 10 and 350 °, in particular between 10 ° and 180 ° or between 180 ° and 350 °, preferably from 10 to 80 °, here equal to 60 °.
  • the duct 6 defines a housing for receiving the device 30 which is of a shape complementary to that of the body 32.
  • the diameter of the housing 60 is at all points identical to the diameter of the envelope surface S32.
  • This housing is formed by the sections 60 and 62 of the duct 6.
  • the diameter of the cylindrical part S32a of the casing surface of the body 32 is substantially identical to the diameter of the cylindrical section 60 of the duct 6 and the angle of convergence of the frustoconical part S32b of the surface S32 is identical to that of the section 62.
  • the device 30 is slid inside the duct 6. In the example, it is long enough to remain immobile in translation when handling the gun 1.
  • an additional stop device such as a tubular jacket mounted tightly or glued inside the duct 6, can be incorporated into the nozzle 2 to keep the device 30 stationary in translation.
  • the device 30 can also be force-fitted inside the duct 6.
  • the body 32 comprises at least one helical groove 34, preferably four helical grooves 34, each having a pitch of between 1 mm and 50 mm, in the example equal to 20 mm.
  • the pitch of each groove 34 is constant. However, in a variant not shown, this pitch can be variable.
  • Each groove 34 extends over the outer surface of the body 32 and which defines a passage duct for the product. More precisely, in operation, the product circulates in the grooves 34, between the body 32 and the wall constituting the duct 6.
  • the grooves 34 give the fluid a helical direction around the spray axis X-X '.
  • the speed of the fluid at the outlet of the device 30 therefore has an axial component and a radial component with respect to the spray axis X-X '.
  • the body 32 comprises a cylindrical upstream part and a frustoconical downstream part, and each helical groove 34 extends continuously on the surface of the cylindrical upstream part and on the surface of the frustoconical downstream part.
  • the depth P34 of each groove 34 is between 1% and 49% of the maximum diameter of the surface S32, in particular equal to 25% of this diameter.
  • the device 30 is in one piece, which facilitates assembly.
  • the ratio between the radial speed component and the axial speed component at the outlet of the device 30 depends on the pitch of the groove or grooves 34.
  • the rotational component of the speed vector of the fluid at the outlet of the device 30 is all the greater when the pace is weak.
  • the pitch is chosen lower when the fluid is viscous.
  • the rotational component of the speed vector at the output of the device 30 is approximately three times greater than the axial component.
  • the rotary effect is attenuated at the nozzle outlet for the small-caliber nozzles 2, in particular for the nozzles whose size is less than 0.9 mm, because the fluid undergoes a strong axial acceleration in the channel 66 due to reduction of the passage section.
  • the axial component of the fluid at the nozzle outlet predominates over the radial component.
  • the device 30 is rather intended to be mounted inside the nozzles whose gauge is at least 0.9 mm.
  • the device 30 is pushed as deeply as possible inside the duct 6, that is to say as close as possible to the outlet orifice of the nozzle 2.
  • the distance d1 between the the downstream end of the device 30 and the outlet orifice of the nozzle 2 is less than 10 mm, in particular equal to 6 mm. This ensures that the fluid retains its rotation until it exits nozzle 2.
  • the device 30 further comprises a gripping handle 36, which is of reduced diameter relative to the body 32.
  • the gripping handle 36 extends axially upstream with respect to the body 32. It advantageously allows manual removal. of the device 30 out of the nozzle 2 for cleaning and / or replacement.
  • the handle 36 advantageously extends over a length I36 at least equal to 5 mm. This minimum length makes it possible to manually push the device 30 as deeply as possible inside the duct 6, that is to say as close as possible to the outlet orifice of the nozzle 2.
  • the device 30 defines a through-bore 38 for the passage of the needle 22 for closing the nozzle 2.
  • the bore 38 extends axially through the handle 36 and the body 32.
  • the diameter d38 of the bore 38 is substantially equal to the diameter of the needle 22, so that the product does not pass inside the body 32.
  • the diameter of the bore 38 can be chosen greater than the diameter of the needle 22 , so that the product can pass inside the body 32. This has the advantage that the spray obtained is easier to spray and requires less energy (pneumatic for example) to be sprayed.
  • the gun 1 comprises a connection 40 for supplying coating product.
  • This connector 40 is oriented perpendicularly with respect to the spray axis XX 'and extends in particular downwards from the body 10 of the gun 1. It is intended to be connected to a product supply pipe (not shown ).
  • the path of the coating product from the connector 40 to the outlet of the nozzle 2 is represented by the arrows F1 at the bottom. figure 8 .
  • the figures 9 and 10 represent a second embodiment of the invention.
  • This second embodiment relates to a device 30 for rotating a fluid inside a nozzle 2, this device comprising a body 32 delimiting at least one helical hole 33 for the passage of all or part of the fluid.
  • at least one groove 34 is replaced by a helical duct, that is to say a hole 33 running through the body of the device 30 in a substantially helical direction.
  • a helical duct that is to say a hole 33 running through the body of the device 30 in a substantially helical direction.
  • Such a device can for example be manufactured using 3D printing.
  • the body 32 defines several helical holes 33 for the passage of all or part of the fluid.
  • the needle 22 and the device 30 are integral with one another.
  • the device 30 can be mounted tight around the needle 22 or crimped or glued to the needle 22.
  • the device 30 and the needle 22 can also be in one piece.
  • the nozzle 2 and the device 30 are linked in a non-removable manner.
  • the nozzle 2 and the device 30 can be two parts integral with one another or one and the same part, manufactured for example by 3D printing.
  • the groove or grooves 34 of the device 30 are cleaned by injection of solvent in place of the coating product.
  • the device 30 is mounted inside an automatic gun, which operates without manual action on the part of an operator and which is controlled remotely.
  • the section and / or the width of the grooves 34 may be different from one groove to another.
  • the section and / or the width of each groove can also vary according to its length.
  • the section of each groove 34 can be rectangular, triangular, elliptical, polygonal or a shape inspired by these solutions (3D printing).
  • the area of the section can also be variable. It is between 0.2 mm 2 to 8 mm 2 .
  • the duct 6 of the nozzle 2 comprises an ejection section which is flared and of rounded shape. This makes it possible to further expand the spray at the nozzle outlet by the Coanda effect.
  • This solution for widening the jet is particularly suitable for small caliber nozzles (less than 0.9 mm), for which the rotary effect conferred by the device 30 is less.
  • this type of nozzle provides a synergistic effect with the device 30 when the size is between 0.7 and 1.2 mm.
  • two devices for rotating in accordance with the invention that is to say comparable or identical to the device for setting rotation 30, are arranged in series one behind the other inside the duct 6.
  • the two devices have inverted pitches: each groove of a first device has a right-hand pitch, while each groove of the second device has a step to the left, or vice versa. This further destabilizes the fluid flow.
  • the two devices can be made in one piece.
  • the application device comprises two separate coating product supply conduits. It can be the same product or two different products to mix.
  • Each supply duct communicates with a corresponding groove 34 of the device 30, which then comprises at least two grooves.
  • the products circulating in the two separate conduits are mixed downstream from the device 30. A part of the fluid circulating inside the nozzle therefore therefore passes through a groove.
  • each groove of the device communicates with a separate coating product supply duct.
  • the number of product supply conduits can therefore be greater than 2.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Nozzles (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)

Description

La présente invention concerne un dispositif de mise en rotation d'un fluide circulant à l'intérieur d'une buse. Notamment, l'invention s'applique à la buse d'un pistolet de pulvérisation d'un produit de revêtement, qu'il soit manuel ou automatique.The present invention relates to a device for rotating a fluid circulating inside a nozzle. In particular, the invention applies to the nozzle of a spray gun for a coating product, whether manual or automatic.

De manière connue, un pistolet de pulvérisation comprend une tête de pulvérisation avec une bague de tête et la buse, qui est disposée coaxialement à l'intérieur de la tête. La buse comprend un canal de passage de liquide configuré pour être obturé sélectivement par un pointeau mobile en translation à l'intérieur de la buse. Le mouvement du pointeau régule l'ouverture du passage du produit de revêtement. Selon la position du pointeau, le produit de revêtement sera expulsé de la buse avec plus ou moins de débit.In known manner, a spray gun comprises a spray head with a head ring and the nozzle, which is disposed coaxially inside the head. The nozzle comprises a liquid passage channel configured to be selectively closed by a needle movable in translation inside the nozzle. The movement of the needle regulates the opening of the passage of the coating product. Depending on the position of the needle, the coating material will be expelled from the nozzle with more or less flow.

La tête de pulvérisation disposée autour de la buse comprend deux cornes traversées chacune par un conduit d'éjection d'air comprimé. Chaque conduit est configuré de sorte que l'air est expulsé radialement en direction du spray de produit de revêtement. Ce dernier est alors atomisé en fines gouttelettes sous l'impact des jets d'air haute-pression. La taille des gouttelettes est d'autant plus fine que la pression d'air comprimé est importante. Toutefois, une pression d'air comprimé trop élevée conduit à la formation d'un brouillard qui diminue le taux de transfert du pistolet, c'est-à-dire le ratio entre la quantité de produit pulvérisée par le pistolet et la quantité de produit réellement déposée sur la pièce à revêtir (overspray).The spray head disposed around the nozzle comprises two horns each crossed by a compressed air ejection duct. Each duct is configured so that air is expelled radially towards the spray of coating material. The latter is then atomized into fine droplets under the impact of high-pressure air jets. The smaller the size of the droplets, the higher the compressed air pressure. However, too high a compressed air pressure leads to the formation of a mist which reduces the transfer rate of the gun, that is to say the ratio between the quantity of product sprayed by the gun and the quantity of product actually deposited on the part to be coated (overspray).

EP-A-1 391 246 divulgue une solution pour améliorer l'atomisation sans accroitre la pression d'air comprimé. Cette solution consiste à loger, à l'intérieur du conduit central de la buse, un dispositif pour fragmenter l'écoulement liquide. Ce dispositif comprend un boitier, un siège pour positionner le boitier et une pièce d'entretoise. Le boitier et le siège délimitent des trous de passage du produit, agencés pour imposer des changements de direction brusques au flux de produit de revêtement, ce qui perturbe l'écoulement. L'écoulement est ainsi déstabilisé en amont de l'orifice de sortie et le produit est éjecté de la buse sous une forme turbulente, c'est à dire en partie défragmentée. Cela permet d'atomiser efficacement le jet de produit, sans augmenter pour autant la pression des jets d'air. Les inconvénients de ce dispositif sont son incapacité à élargir le spray, son coût de fabrication (trois pièces distinctes) et ses difficultés de montage. En outre, ce dispositif est difficile à nettoyer. EP-A-1 391 246 discloses a solution for improving atomization without increasing the compressed air pressure. This solution consists in accommodating, inside the central duct of the nozzle, a device for fragmenting the liquid flow. This device comprises a housing, a seat for positioning the housing and a spacer piece. The housing and the seat delimit product passage holes, arranged to impose sudden changes of direction to the flow of coating product, which disturbs the flow. The flow is thus destabilized upstream of the outlet orifice and the product is ejected from the nozzle in a turbulent form, ie in part defragmented. This effectively atomizes the product jet, without increasing the pressure of the air jets. The drawbacks of this device are its inability to expand the spray, its manufacturing cost (three separate parts) and its assembly difficulties. In addition, this device is difficult to clean.

C'est à ces inconvénients qu'entend plus particulièrement remédier l'invention en proposant un dispositif de mise en rotation plus facile à fabriquer, moins cher, et plus facile à monter à l'intérieur de la buse.It is these drawbacks that the invention more particularly intends to remedy by proposing a device for setting in rotation which is easier to manufacture, less expensive, and easier to mount inside the nozzle.

US 3 123 306 divulgue aux figures 3 et 4 un pistolet avec un mélangeur pourvu d'une rainure hélicoïdale. US 3,123,306 discloses to figures 3 and 4 a gun with a mixer provided with a helical groove.

Dans d'autres domaines, US 2013/0288195 A1 divulgue une buse pour faire du sablage avec des détergents et EP 2 383 043 A2 divulgue un pistolet de pulvérisation d'un produit bi-composant, ce qui a trait à un domaine technique très particulier qui est celui des pulvérisateurs équipés d'un mélangeur.In other areas, US 2013/0288195 A1 discloses a nozzle for sandblasting with detergents and EP 2 383 043 A2 discloses a spray gun for a two-component product, which relates to a very particular technical field which is that of sprayers equipped with a mixer.

A cet effet l'invention concerne un pistolet de pulvérisation d'un produit de revêtement selon la revendication 1.To this end, the invention relates to a gun for spraying a coating product according to claim 1.

L'invention concerne aussi, en variante, un pistolet de pulvérisation d'un produit de revêtement selon la revendication 2.The invention also relates, as a variant, to a spray gun for a coating product according to claim 2.

Avantageusement, ce pistolet peut comprendre les caractéristiques de la revendication 3.Advantageously, this gun can comprise the characteristics of claim 3.

Grâce à l'invention, le ou les rainures et/ou le ou les trous du dispositif donnent au liquide circulant à l'intérieur de la buse une direction hélicoïdale autour d'un axe de pulvérisation. La rotation en amont de l'orifice de sortie de la buse se traduit par un élargissement du spray. En outre, l'écoulement est déstabilisé, voire turbulent, ce qui le rend plus facile à atomiser. Ainsi, le dispositif permet d'obtenir une distribution de gouttes de taille plus fine, sans pour autant augmenter la pression et/ou le débit des jets d'air d'atomisation. En d'autres termes, le dispositif permet d'obtenir un pistolet avec une finesse d'atomisation identique à celle des pistolets de l'art antérieur, mais avec une consommation en air comprimé moindre, et donc un meilleur rendement.Thanks to the invention, the groove (s) and / or the hole (s) of the device give the liquid circulating inside the nozzle a helical direction around a spray axis. The rotation upstream of the outlet orifice of the nozzle results in a widening of the spray. In addition, the flow is destabilized, even turbulent, which makes it easier to atomize. Thus, the device makes it possible to obtain a distribution of drops of finer size, without increasing the pressure and / or the flow rate of the atomizing air jets. In other words, the device makes it possible to obtain a gun with an atomization fineness identical to that of the guns of the prior art, but with less compressed air consumption, and therefore better efficiency.

Des aspects avantageux mais non obligatoires de l'invention sont définis aux revendications 4 et suivantes.Advantageous but not mandatory aspects of the invention are defined in claims 4 and following.

L'invention et d'autres avantages de celle-ci apparaitront plus clairement à la lumière de la description qui va suivre de deux modes de réalisation d'un dispositif de mise en rotation conforme à son principe, donnée uniquement à titre d'exemple et faite en référence aux dessins dans lesquels :

  • la figure 1 est une vue en perspective d'un pistolet pulvérisateur de produit de revêtement, comprenant un dispositif de mise en rotation conforme à un premier mode de réalisation de l'invention,
  • la figure 2 est une coupe partielle dans le plan II de la figure 1,
  • la figure 3 est une vue à plus grande échelle de l'encadré III de la figure 2,
  • la figure 4 est une vue en perspective du dispositif de mise en rotation,
  • la figure 5 est une coupe longitudinale du dispositif conforme à l'invention,
  • la figure 6 est une vue en élévation du pistolet de la figure 1, dans lequel la tête de pulvérisation a été pivotée de 90°,
  • la figure 7 est une vue à plus grande échelle de l'encerclé VII de la figure 6,
  • la figure 8 est une coupe (à plus grande échelle) dans le plan de la ligne VIII-VIII à la figure 7,
  • la figure 9 est une vue en perspective d'un dispositif de mise en rotation conforme à un second mode de réalisation de l'invention, et
  • la figure 10 est une coupe dans le plan X de la figure 9.
The invention and other advantages thereof will appear more clearly in the light of the following description of two embodiments of a device for rotating in accordance with its principle, given solely by way of example and made with reference to the drawings in which:
  • the figure 1 is a perspective view of a spray gun for coating product, comprising a device for rotating according to a first embodiment of the invention,
  • the figure 2 is a partial section in plane II of the figure 1 ,
  • the figure 3 is a larger-scale view of Box III of the figure 2 ,
  • the figure 4 is a perspective view of the rotating device,
  • the figure 5 is a longitudinal section of the device according to the invention,
  • the figure 6 is a view in elevation of the pistol of the figure 1 , in which the spray head has been rotated 90 °,
  • the figure 7 is a view on a larger scale of circle VII of the figure 6 ,
  • the figure 8 is a section (on a larger scale) in the plane of line VIII-VIII at the figure 7 ,
  • the figure 9 is a perspective view of a rotating device according to a second embodiment of the invention, and
  • the figure 10 is a section in the X plane of the figure 9 .

Sur les figures 1 et 6 est représenté un pistolet manuel 1 pour la pulvérisation d'un produit de revêtement. Le produit de revêtement peut être un liquide comprenant un ou plusieurs composants ou un matériau pulvérulent. Il peut s'agir de peinture, d'un apprêt, d'un vernis, etc...On the figures 1 and 6 is shown a manual gun 1 for spraying a coating product. The coating material can be a liquid comprising one or more components or a powder material. It can be paint, primer, varnish, etc.

Le pistolet 1 comprend un corps 10, une crosse de préhension 11 et une gâchette d'actionnement 12 articulée sur le corps 10. Le pistolet 1 comprend une tête de pulvérisation 14 et une bague de tête 16 disposée autour de la tête 14. La tête 14 et la bague de tête 16 sont centrées sur un axe de pulvérisation X-X'. La tête de pulvérisation 14 peut avantageusement être pivotée autour de l'axe X-X' pour diriger le spray dans un plan sensiblement horizontal, comme dans la configuration des figures 1 à 3, ou dans un plan sensiblement vertical, comme dans la configuration des figure 6 à 8.The gun 1 comprises a body 10, a gripping handle 11 and an actuating trigger 12 articulated on the body 10. The gun 1 comprises a spray head 14 and a head ring 16 disposed around the head 14. The head 14 and the head ring 16 are centered on a spray axis X-X '. The spray head 14 can advantageously be pivoted about the axis XX 'to direct the spray in a substantially horizontal plane, as in the configuration of figures 1 to 3 , or in a substantially vertical plane, as in the configuration of figure 6 to 8 .

Comme visible à la figure 2, la tête 14 est creuse. Elle comprend deux protubérances 14a et 14b, plus communément appelées cornes ou oreilles, qui sont disposées de manière diamétralement opposée l'une par rapport à l'autre. Les cornes 14a et 14b font saillie de manière parallèle à l'axe X-X' par rapport au reste de la tête 14. Elles délimitent chacune deux orifices 140 d'éjection d'air comprimé. Les orifices 140 sont conformés pour guider des jets d'air en direction de l'axe de pulvérisation X-X'. Plus précisément, les jets d'air issus des orifices 140 ont une direction sensiblement radiale et centripète par rapport à l'axe de pulvérisation X-X' du pistolet. On entend par l'adjectif « sensiblement » qu'il y a un écart de quelques degrés entre une direction rigoureusement radiale à l'axe X-X' et la direction des jets d'air. Le pistolet représenté à la figure 1 est donc un pistolet du type pneumatique, utilisant des jets d'air pour la formation du spray.As visible at the figure 2 , the head 14 is hollow. It comprises two protuberances 14a and 14b, more commonly called horns or ears, which are arranged diametrically opposed to one another. The horns 14a and 14b project parallel to the axis XX 'relative to the rest of the head 14. They each define two orifices 140 for ejection of compressed air. The orifices 140 are shaped to guide air jets in the direction of the spray axis X-X '. More precisely, the air jets issuing from the orifices 140 have a direction which is substantially radial and centripetal with respect to the spray axis XX 'of the gun. The adjective “substantially” is understood to mean that there is a difference of a few degrees between a direction strictly radial to the axis XX ′ and the direction of the air jets. The pistol depicted in the figure 1 is therefore a gun of the pneumatic type, using air jets for the formation of the spray.

Une buse 2 est disposée coaxialement à l'intérieur de la tête 14. La buse 2 est une buse standard de pistolet de pulvérisation. Il s'agit d'une pièce à géométrie de révolution autour de l'axe X-X'. Dans l'exemple, la buse 2 comprend deux parties coaxiales 2a et 2b, la partie 2a étant disposée à l'intérieur de la partie 2b. La buse 2 délimite un conduit 6 de passage pour le produit. Le conduit 6 est situé à l'intérieur de la partie 2a. La buse 2 est une buse de type « jet plat », c'est-à-dire qu'il s'agit d'une buse dont l'empreinte prend la forme d'une ellipse étirée. Toutefois, en variante, la buse 2 peut être une buse de type « jet rond », c'est-à-dire une buse dont l'empreinte prend la forme d'un disque ou d'un anneau.A nozzle 2 is disposed coaxially inside the head 14. The nozzle 2 is a standard spray gun nozzle. It is about a part with geometry of revolution around the axis X-X '. In the example, the nozzle 2 comprises two coaxial parts 2a and 2b, the part 2a being arranged inside the part 2b. The nozzle 2 delimits a duct 6 of passage for the product. Conduit 6 is located inside part 2a. The nozzle 2 is a “flat jet” type nozzle, that is to say that it is a nozzle whose footprint takes the form of a stretched ellipse. However, as a variant, the nozzle 2 can be a nozzle of the “round jet” type, that is to say a nozzle whose imprint takes the form of a disc or a ring.

Le conduit 6 est configuré pour être obturé sélectivement par un pointeau 22 mobile axialement en translation à l'intérieur de la buse 2. Le déplacement du pointeau 22 est commandé par la gâchette 12. Un ressort de rappel (non représenté) permet de rappeler le pointeau en position de fermeture lorsque l'opérateur relâche la gâchette 12.The duct 6 is configured to be selectively closed by a needle 22 movable axially in translation inside the nozzle 2. The movement of the needle 22 is controlled by the trigger 12. A return spring (not shown) enables the return to be made. needle in the closed position when the operator releases the trigger 12.

On définit une direction amont comme une direction orientée dans le sens opposé à l'écoulement de liquide et une direction aval comme une direction orientée dans le sens de l'écoulement. Dans la configuration de la figure 2, l'amont est dirigé vers la droite, alors que l'aval est dirigé vers la gauche.An upstream direction is defined as a direction oriented in the direction opposite to the flow of liquid and a downstream direction as a direction oriented in the direction of the flow. In the configuration of the figure 2 , upstream is directed to the right, while downstream is directed to the left.

Comme visible aux figures 2 et 3, le conduit 6 comprend, de l'amont vers l'aval, un premier tronçon 60, cylindrique, un deuxième tronçon 62, tronconique, dont la section de passage diminue de l'amont vers l'aval, un troisième tronçon 64, également tronconique et dont la section diminue de l'amont vers l'aval et un canal d'éjection 66, de section de passage constante.As visible to figures 2 and 3 , the duct 6 comprises, from upstream to downstream, a first section 60, cylindrical, a second section 62, frustoconical, the passage section of which decreases from upstream to downstream, a third section 64, also frustoconical and whose section decreases from upstream to downstream and an ejection channel 66, of constant passage section.

Dans le présent document, le « calibre » d'une buse correspond au diamètre de la dernière section de passage du fluide avant éjection, c'est-à-dire dans l'exemple au diamètre d66 du canal d'éjection 66. En pratique, le calibre d'une buse varie entre 0,4 mm (buse de calibre 4) et 2,7 mm (buse de calibre 27).In the present document, the “size” of a nozzle corresponds to the diameter of the last section of passage of the fluid before ejection, that is to say in the example to the diameter d66 of the ejection channel 66. In practice , the size of a nozzle varies between 0.4 mm (4 gauge nozzle) and 2.7 mm (27 gauge nozzle).

On définit un plan P comme le plan d'étanchéité du pointeau 22 à l'intérieur de la buse 2. Le plan P est perpendiculaire à l'axe de pulvérisation X-X'. Comme visible à la figure 3, le plan P est disposé à l'interface entre le tronçon 64 et le canal 66. La buse 2 conforme à l'invention a pour avantage que la position du plan d'étanchéité P selon l'axe X-X' est standard, c'est-à-dire que la buse 2 est compatible avec un pointeau existant du commerce, tel que le pointeau 22. Cela permet de garantir le débit de la buse 2 et de limiter la présence de volumes morts, susceptibles de retenir du produit et de causer la formation de gouttes après la fermeture de la buse 2.A plane P is defined as the sealing plane of the needle 22 inside the nozzle 2. The plane P is perpendicular to the spray axis X-X '. As visible at the figure 3 , the plane P is disposed at the interface between the section 64 and the channel 66. The nozzle 2 according to the invention has the advantage that the position of the sealing plane P along the axis XX 'is standard, c' that is to say that the nozzle 2 is compatible with an existing commercial needle, such as the needle 22. This makes it possible to guarantee the flow rate of the nozzle 2 and to limit the presence of dead volumes, liable to retain product and cause drops to form after closing the nozzle 2.

En fonctionnement, les jets d'air issus des cornes 14a et 14b de la tête 14 percutent le jet de produit éjecté à travers la buse 2. Avantageusement, des boutons poussoirs 18 et 20, visibles à la figure 1, sont prévus pour interrompre respectivement la pulvérisation de produit et l'utilisation d'air comprimé.In operation, the air jets coming from the horns 14a and 14b of the head 14 strike the jet of product ejected through the nozzle 2. Advantageously, push buttons 18 and 20, visible at the bottom. figure 1 , are designed to interrupt the spraying of product and the use of compressed air, respectively.

Un dispositif amovible 30 est immobilisé à l'intérieur du conduit 6. Le dispositif 30 est conçu pour les buses standards de pistolet. Il s'agit d'un dispositif de mise en rotation du fluide circulant à l'intérieur du conduit 6. Il comprend un corps 32, dont la surface d'enveloppe S32 est à section circulaire. On définit la surface d'enveloppe comme une surface enveloppant le corps 32. On peut alors imaginer la surface S32 comme la surface du corps 32 lorsque celui-ci est enveloppé dans un film d'épaisseur nulle. La surface d'enveloppe S32 est centrée sur un axe X32 qui est confondu avec l'axe X-X' lorsque le dispositif 30 est en place à l'intérieur du conduit 6.A removable device 30 is immobilized inside the conduit 6. The device 30 is designed for standard gun nozzles. This is a rotating device fluid circulating inside the conduit 6. It comprises a body 32, the envelope surface S32 of which has a circular section. The envelope surface is defined as a surface enveloping the body 32. It is then possible to imagine the surface S32 as the surface of the body 32 when the latter is enveloped in a film of zero thickness. The envelope surface S32 is centered on an axis X32 which coincides with the axis XX 'when the device 30 is in place inside the duct 6.

Dans l'exemple, le dispositif 30 est une pièce métallique usinée. Toutefois, en variante, le dispositif 30 peut être en matière plastique et peut être réalisé par d'autres moyens, comme par moulage ou au moyen d'une imprimante 3D.In the example, the device 30 is a machined metal part. However, as a variant, the device 30 can be made of plastic and can be produced by other means, such as by molding or by means of a 3D printer.

Dans l'exemple, la surface d'enveloppe S32 du corps comprend une partie cylindrique S32a et une partie tronconique S32b disposée en aval de la partie cylindrique S32a. Le diamètre de la partie tronconique S32b de la surface S32 diminue en allant vers l'aval. L'angle de convergence A32b de la partie tronconique S32b est compris entre 10 et 350°, notamment entre 10° et 180° ou entre 180° et 350 °, de préférence de 10 à 80°, ici égal à 60°.In the example, the envelope surface S32 of the body comprises a cylindrical part S32a and a frustoconical part S32b disposed downstream of the cylindrical part S32a. The diameter of the frustoconical part S32b of the surface S32 decreases going downstream. The angle of convergence A32b of the frustoconical part S32b is between 10 and 350 °, in particular between 10 ° and 180 ° or between 180 ° and 350 °, preferably from 10 to 80 °, here equal to 60 °.

Le conduit 6 définit un logement de réception du dispositif 30 qui est de forme complémentaire à celle du corps 32. Autrement dit, le diamètre du logement 60 est en tout point identique au diamètre de la surface d'enveloppe S32. Ce logement est formé par les tronçons 60 et 62 du conduit 6. Ainsi, le diamètre de la partie cylindrique S32a de la surface d'enveloppe du corps 32 est sensiblement identique au diamètre du tronçon cylindrique 60 du conduit 6 et l'angle de convergence de la partie tronconique S32b de la surface S32 est identique à celui du tronçon 62.The duct 6 defines a housing for receiving the device 30 which is of a shape complementary to that of the body 32. In other words, the diameter of the housing 60 is at all points identical to the diameter of the envelope surface S32. This housing is formed by the sections 60 and 62 of the duct 6. Thus, the diameter of the cylindrical part S32a of the casing surface of the body 32 is substantially identical to the diameter of the cylindrical section 60 of the duct 6 and the angle of convergence of the frustoconical part S32b of the surface S32 is identical to that of the section 62.

En pratique, le dispositif 30 est glissé à l'intérieur du conduit 6. Il est dans l'exemple assez long pour rester immobile en translation lors de la manipulation du pistolet 1. En variante non représentée, un dispositif additionnel de mise en butée, tel qu'une chemise tubulaire montée serrée ou collée à l'intérieur du conduit 6, peut être incorporé à la buse 2 pour maintenir le dispositif 30 immobile en translation.In practice, the device 30 is slid inside the duct 6. In the example, it is long enough to remain immobile in translation when handling the gun 1. In a variant not shown, an additional stop device, such as a tubular jacket mounted tightly or glued inside the duct 6, can be incorporated into the nozzle 2 to keep the device 30 stationary in translation.

D'autre part, le dispositif 30 peut également être monté en force à l'intérieur du conduit 6.On the other hand, the device 30 can also be force-fitted inside the duct 6.

Le corps 32 comporte au moins une rainure hélicoïdale 34, de préférence quatre rainures hélicoïdales 34, ayant chacune un pas compris entre 1 mm et 50 mm, dans l'exemple égal à 20 mm. Dans l'exemple, le pas de chaque rainure 34 est constant. Toutefois, en variante non représentée, ce pas peut être variable.The body 32 comprises at least one helical groove 34, preferably four helical grooves 34, each having a pitch of between 1 mm and 50 mm, in the example equal to 20 mm. In the example, the pitch of each groove 34 is constant. However, in a variant not shown, this pitch can be variable.

Chaque rainure 34 s'étend sur la surface extérieure du corps 32 et qui définit un conduit de passage pour le produit. Plus précisément, en fonctionnement, le produit circule dans les rainures 34, entre le corps 32 et la paroi constitutive du conduit 6. Les rainures 34 donnent au fluide une direction hélicoïdale autour de l'axe de pulvérisation X-X'. La vitesse du fluide en sortie du dispositif 30 a donc une composante axiale et une composante radiale par rapport à l'axe de pulvérisation X-X'.Each groove 34 extends over the outer surface of the body 32 and which defines a passage duct for the product. More precisely, in operation, the product circulates in the grooves 34, between the body 32 and the wall constituting the duct 6. The grooves 34 give the fluid a helical direction around the spray axis X-X '. The speed of the fluid at the outlet of the device 30 therefore has an axial component and a radial component with respect to the spray axis X-X '.

Comme visible aux figures 4 et 5, le corps 32 comprend une partie amont cylindrique et une partie aval tronconique, et chaque rainure hélicoïdale 34 s'étend de manière continue à la surface de la partie amont cylindrique et à la surface de la partie aval tronconique.As visible to figures 4 and 5 , the body 32 comprises a cylindrical upstream part and a frustoconical downstream part, and each helical groove 34 extends continuously on the surface of the cylindrical upstream part and on the surface of the frustoconical downstream part.

Avantageusement, la profondeur P34 de chaque rainure 34 est comprise entre 1% et 49% du diamètre maximal de la surface S32, notamment égale à 25% de ce diamètre.Advantageously, the depth P34 of each groove 34 is between 1% and 49% of the maximum diameter of the surface S32, in particular equal to 25% of this diameter.

Ainsi, contrairement au dispositif de EP-A-1 391 246 , le dispositif 30 est monobloc, ce qui facilite le montage.Thus, unlike the device of EP-A-1 391 246 , the device 30 is in one piece, which facilitates assembly.

Le ratio entre la composante de vitesse radiale et la composante de vitesse axiale en sortie du dispositif 30 dépend du pas du ou des rainures 34. Notamment, la composante rotationnelle du vecteur vitesse du fluide en sortie du dispositif 30 est d'autant plus importante que le pas est faible. De préférence, le pas est choisi plus faible lorsque le fluide est visqueux. Dans l'exemple, la composante rotationnelle du vecteur vitesse en sortie du dispositif 30 est environ trois fois plus grande que la composante axiale.The ratio between the radial speed component and the axial speed component at the outlet of the device 30 depends on the pitch of the groove or grooves 34. In particular, the rotational component of the speed vector of the fluid at the outlet of the device 30 is all the greater when the pace is weak. Preferably, the pitch is chosen lower when the fluid is viscous. In the example, the rotational component of the speed vector at the output of the device 30 is approximately three times greater than the axial component.

Toutefois, l'effet rotatif est atténué en sortie de buse pour les buses 2 de petit calibre, notamment pour les buses dont le calibre est inférieur à 0,9 mm, car le fluide subit une forte accélération axiale dans le canal 66 du fait de la réduction de la section de passage. Ainsi, la composante axiale du fluide en sortie de buse prédomine sur la composante radiale. En revanche, pour les buses de gros calibre, c'est-à-dire pour les buses dont le calibre est au moins égal à 0,9 mm, le fluide subit moins d'accélération axiale dans le canal d'éjection 66 et est éjecté avec une composante rotationnelle importante. Par conséquent, le dispositif 30 est plutôt destiné à être monté à l'intérieur des buses dont le calibre est d'au moins 0,9 mm.However, the rotary effect is attenuated at the nozzle outlet for the small-caliber nozzles 2, in particular for the nozzles whose size is less than 0.9 mm, because the fluid undergoes a strong axial acceleration in the channel 66 due to reduction of the passage section. Thus, the axial component of the fluid at the nozzle outlet predominates over the radial component. On the other hand, for large caliber nozzles, that is to say for nozzles whose caliber is at least equal to 0.9 mm, the fluid undergoes less axial acceleration in the ejection channel 66 and is ejected with a large rotational component. Therefore, the device 30 is rather intended to be mounted inside the nozzles whose gauge is at least 0.9 mm.

Avantageusement, le dispositif 30 est enfoncé le plus profondément possible à l'intérieur du conduit 6, c'est-à-dire au plus près de l'orifice de sortie de la buse 2. Dans l'exemple, la distance d1 entre l'extrémité aval du dispositif 30 et l'orifice de sortie de la buse 2 est inférieure à 10 mm, notamment égale à 6 mm. Cela garantit que le fluide conserve sa rotation jusqu'à la sortie de la buse 2.Advantageously, the device 30 is pushed as deeply as possible inside the duct 6, that is to say as close as possible to the outlet orifice of the nozzle 2. In the example, the distance d1 between the the downstream end of the device 30 and the outlet orifice of the nozzle 2 is less than 10 mm, in particular equal to 6 mm. This ensures that the fluid retains its rotation until it exits nozzle 2.

Avantageusement, le dispositif 30 comprend en outre un manche de préhension 36, qui est de diamètre réduit par rapport au corps 32. Le manche de préhension 36 s'étend axialement vers l'amont par rapport au corps 32. Il permet avantageusement le retrait manuel du dispositif 30 hors de la buse 2 pour des fins de nettoyage et/ou de remplacement. Le manche 36 s'étend avantageusement sur une longueur I36 au moins égale à 5 mm. Cette longueur minimale permet d'enfoncer manuellement le dispositif 30 le plus profondément possible à l'intérieur du conduit 6, c'est-à-dire au plus près de l'orifice de sortie de la buse 2.Advantageously, the device 30 further comprises a gripping handle 36, which is of reduced diameter relative to the body 32. The gripping handle 36 extends axially upstream with respect to the body 32. It advantageously allows manual removal. of the device 30 out of the nozzle 2 for cleaning and / or replacement. The handle 36 advantageously extends over a length I36 at least equal to 5 mm. This minimum length makes it possible to manually push the device 30 as deeply as possible inside the duct 6, that is to say as close as possible to the outlet orifice of the nozzle 2.

Dans l'exemple, le dispositif 30 délimite un alésage traversant 38 pour le passage du pointeau 22 de fermeture de la buse 2. L'alésage 38 s'étend axialement à travers le manche 36 et le corps 32. Le diamètre d38 de l'alésage 38 est sensiblement égal au diamètre du pointeau 22, de sorte que le produit ne passe pas à l'intérieur du corps 32. Toutefois, en variante non représentée, le diamètre de l'alésage 38 peut être choisi supérieur au diamètre du pointeau 22, si bien que le produit peut passer à l'intérieur du corps 32. Cela a pour avantage que le spray obtenu est plus facile à pulvériser et demande moins d'énergie (pneumatique par exemple) pour être pulvérisé.In the example, the device 30 defines a through-bore 38 for the passage of the needle 22 for closing the nozzle 2. The bore 38 extends axially through the handle 36 and the body 32. The diameter d38 of the bore 38 is substantially equal to the diameter of the needle 22, so that the product does not pass inside the body 32. However, in a variant not shown, the diameter of the bore 38 can be chosen greater than the diameter of the needle 22 , so that the product can pass inside the body 32. This has the advantage that the spray obtained is easier to spray and requires less energy (pneumatic for example) to be sprayed.

Comme visible à la figure 8, le pistolet 1 comprend un raccord 40 d'alimentation en produit de revêtement. Ce raccord 40 est orienté perpendiculairement par rapport à l'axe de pulvérisation X-X' et s'étend notamment vers le bas à partir du corps 10 du pistolet 1. Il est destiné à être connecté à un tuyau d'alimentation en produit (non représenté). Le cheminement du produit de revêtement à partir du raccord 40 jusqu'à l'orifice de sortie de la buse 2 est représenté par les flèches F1 à la figure 8.As visible at the figure 8 , the gun 1 comprises a connection 40 for supplying coating product. This connector 40 is oriented perpendicularly with respect to the spray axis XX 'and extends in particular downwards from the body 10 of the gun 1. It is intended to be connected to a product supply pipe (not shown ). The path of the coating product from the connector 40 to the outlet of the nozzle 2 is represented by the arrows F1 at the bottom. figure 8 .

Indépendamment de ce qui précède, les figures 9 et 10 représentent un deuxième mode de réalisation de l'invention. Ce deuxième mode concerne un dispositif 30 de mise en rotation d'un fluide à l'intérieur d'une buse 2, ce dispositif comprenant un corps 32 délimitant au moins un trou hélicoïdal 33 pour le passage de tout ou partie du fluide. Ainsi, en comparaison avec le premier mode de réalisation, au moins une rainure 34 est remplacée par un conduit hélicoïdal, c'est-à-dire un trou 33 cheminant à travers le corps du dispositif 30 suivant une direction sensiblement hélicoïdale. Un tel dispositif peut par exemple être fabriqué grâce à l'impression 3D. En variante non représentée, le corps 32 délimite plusieurs trous hélicoïdaux 33 pour le passage de tout ou partie du fluideRegardless of the above, the figures 9 and 10 represent a second embodiment of the invention. This second embodiment relates to a device 30 for rotating a fluid inside a nozzle 2, this device comprising a body 32 delimiting at least one helical hole 33 for the passage of all or part of the fluid. Thus, in comparison with the first embodiment, at least one groove 34 is replaced by a helical duct, that is to say a hole 33 running through the body of the device 30 in a substantially helical direction. Such a device can for example be manufactured using 3D printing. In a variant not shown, the body 32 defines several helical holes 33 for the passage of all or part of the fluid.

Selon des aspects avantageux, mais non obligatoires, ce dispositif 30 peut comprendre une ou plusieurs des caractéristiques suivantes, prises dans toute combinaison techniquement admissible :

  • Le corps 32 comprend une partie amont cylindrique et une partie aval tronconique, alors que chaque trou hélicoïdal 33 s'étend de manière continue à travers la partie cylindrique et à travers la partie tronconique du corps.
  • Une surface d'enveloppe S32 du corps 32 est à section circulaire ou elliptique.
  • La surface d'enveloppe S32 du corps 32 est au moins en partie cylindrique (voir surface S32a) et/ou tronconique (voir surface S32b).
  • La surface d'enveloppe S32 du corps comprend une partie amont cylindrique S32a et une partie aval tronconique S32b.
  • Le dispositif comprend en outre un manche de préhension 36, qui est de diamètre réduit par rapport au corps 32.
  • La longueur du manche 36 est supérieure ou égale à 5 mm.
  • Le dispositif délimite un alésage central traversant 38 pour le passage d'un pointeau 22 de fermeture de la buse 2.
  • Le corps 32 délimite au moins une rainure hélicoïdale pour le passage de tout ou partie du fluide.
  • Le dispositif est fabriqué par impression 3D.
According to advantageous, but not compulsory, aspects, this device 30 can comprise one or more of the following characteristics, taken in any technically admissible combination:
  • The body 32 includes an upstream cylindrical part and a downstream frustoconical part, while each helical hole 33 extends continuously through the cylindrical part and through the frustoconical part of the body.
  • An envelope surface S32 of the body 32 is of circular or elliptical section.
  • The envelope surface S32 of the body 32 is at least partly cylindrical (see surface S32a) and / or frustoconical (see surface S32b).
  • The envelope surface S32 of the body comprises a cylindrical upstream part S32a and a frustoconical downstream part S32b.
  • The device further comprises a gripping handle 36, which is of reduced diameter relative to the body 32.
  • The length of the handle 36 is greater than or equal to 5 mm.
  • The device defines a central through bore 38 for the passage of a needle 22 for closing the nozzle 2.
  • The body 32 defines at least one helical groove for the passage of all or part of the fluid.
  • The device is made by 3D printing.

A titre de variante non représentée, le pointeau 22 et le dispositif 30 sont solidaires l'un avec l'autre. Notamment, le dispositif 30 peut être monté serré autour du pointeau 22 ou serti ou collé au pointeau 22. Le dispositif 30 et le pointeau 22 peuvent également être d'un seul tenant.As a variant not shown, the needle 22 and the device 30 are integral with one another. In particular, the device 30 can be mounted tight around the needle 22 or crimped or glued to the needle 22. The device 30 and the needle 22 can also be in one piece.

Selon une autre variante non représentée, la buse 2 et le dispositif 30 sont liés de manière indémontable. Notamment, la buse 2 et le dispositif 30 peuvent être deux pièces solidaires l'une de l'autre ou une seule et même pièce, fabriquée par exemple par impression 3D. La ou les rainures 34 du dispositif 30 sont nettoyées par injection de solvant en lieu et place du produit de revêtement.According to another variant not shown, the nozzle 2 and the device 30 are linked in a non-removable manner. In particular, the nozzle 2 and the device 30 can be two parts integral with one another or one and the same part, manufactured for example by 3D printing. The groove or grooves 34 of the device 30 are cleaned by injection of solvent in place of the coating product.

Selon une autre variante non représentée, le dispositif 30 est monté à l'intérieur d'un pistolet automatique, qui fonctionne sans action manuelle de la part d'un opérateur et qui est commandé à distance.According to another variant not shown, the device 30 is mounted inside an automatic gun, which operates without manual action on the part of an operator and which is controlled remotely.

Selon une autre variante non représentée, la section et/ou la largeur des rainures 34 peut être différente d'une rainure à l'autre. La section et/ou la largeur de chaque rainure peut également varier suivant sa longueur. La section de chaque rainure 34 peut être de forme rectangulaire, triangulaire, elliptique, polygonale ou une forme inspirée de ces solutions (impression 3D). L'aire de la section peut aussi être variable. Elle est comprise entre 0,2 mm2 à 8 mm2. Selon une autre variante non représentée, le conduit 6 de la buse 2 comprend un tronçon d'éjection qui est évasé et de forme arrondie. Cela permet d'élargir davantage le spray en sortie de buse par effet Coanda. Cette solution pour élargir le jet est particulièrement adaptée pour les buses de petit calibre (inférieur à 0,9mm), pour lesquelles l'effet rotatif conféré par le dispositif 30 est moindre. Dans la pratique, ce type de buse procure un effet synergique avec le dispositif 30 lorsque le calibre est compris entre 0,7 et 1,2 mm.According to another variant not shown, the section and / or the width of the grooves 34 may be different from one groove to another. The section and / or the width of each groove can also vary according to its length. The section of each groove 34 can be rectangular, triangular, elliptical, polygonal or a shape inspired by these solutions (3D printing). The area of the section can also be variable. It is between 0.2 mm 2 to 8 mm 2 . According to another variant not shown, the duct 6 of the nozzle 2 comprises an ejection section which is flared and of rounded shape. This makes it possible to further expand the spray at the nozzle outlet by the Coanda effect. This solution for widening the jet is particularly suitable for small caliber nozzles (less than 0.9 mm), for which the rotary effect conferred by the device 30 is less. In practice, this type of nozzle provides a synergistic effect with the device 30 when the size is between 0.7 and 1.2 mm.

Selon une autre variante non représentée, deux dispositifs de mise en rotation conformes à l'invention, c'est-à-dire comparables ou identiques au dispositif de mise en rotation 30, sont disposés en série l'un derrière l'autre à l'intérieur du conduit 6. Avantageusement, les deux dispositifs ont des pas inversés : chaque rainure d'un premier dispositif a un pas à droite, alors que chaque rainure du second dispositif a un pas à gauche, ou inversement. Cela permet de déstabiliser davantage l'écoulement fluide. Les deux dispositifs peuvent être réalisés d'un seul tenant.According to another variant not shown, two devices for rotating in accordance with the invention, that is to say comparable or identical to the device for setting rotation 30, are arranged in series one behind the other inside the duct 6. Advantageously, the two devices have inverted pitches: each groove of a first device has a right-hand pitch, while each groove of the second device has a step to the left, or vice versa. This further destabilizes the fluid flow. The two devices can be made in one piece.

Selon une autre variante non représentée, le dispositif d'application comprend deux conduits d'alimentation en produit de revêtement séparés. Il peut s'agir du même produit ou de deux produits différents à mélanger. Chaque conduit d'alimentation communique avec une rainure correspondante 34 du dispositif 30, lequel comporte alors au moins deux rainures. Les produits circulant dans les deux conduits séparés sont mélangés en aval du dispositif 30. Une partie alors du fluide circulant à l'intérieur de la buse passe donc à travers une rainure. De manière plus générale, chaque rainure du dispositif communique avec un conduit d'alimentation en produit de revêtement séparé. Le nombre de conduits d'alimentation en produit peut donc être supérieur à 2.According to another variant not shown, the application device comprises two separate coating product supply conduits. It can be the same product or two different products to mix. Each supply duct communicates with a corresponding groove 34 of the device 30, which then comprises at least two grooves. The products circulating in the two separate conduits are mixed downstream from the device 30. A part of the fluid circulating inside the nozzle therefore therefore passes through a groove. More generally, each groove of the device communicates with a separate coating product supply duct. The number of product supply conduits can therefore be greater than 2.

Les caractéristiques des variantes et du mode de réalisation envisagés ci-dessus peuvent être combinées entre elles pour générer de nouveaux modes de réalisation de l'invention.The characteristics of the variants and of the embodiment considered above can be combined with one another to generate new embodiments of the invention.

Claims (12)

  1. Manual or automatic spray gun for spraying a coating product, comprising a nozzle and a device (30) for setting the product in rotation inside the nozzle (2), the device comprising a body (32) delimiting at least one helical groove (34) for the passage of all or some of the product, the device (30) delimiting a central through-bore (38) for the passage of a needle (22) for closing the nozzle (2), characterised in that the body comprises an upstream cylindrical portion and a downstream frustoconical portion, and in that each helical groove (34) extends continuously at the surface of the upstream cylindrical portion and at the surface of the downstream frustoconical portion.
  2. Manual or automatic spray gun for spraying a coating product, comprising a nozzle and a device (30) for setting the product in rotation inside the nozzle (2), characterised in that the device comprises a body (32) delimiting at least one helical hole (33) for the passage of all or some of the product, and in that the device delimits a central through-bore (38) for the passage of a needle (22) for closing the nozzle (2).
  3. Gun according to the preceding claim, characterised in that the body comprises an upstream cylindrical portion and a downstream frustoconical portion, and in that each helical hole (33) extends continuously through the cylindrical portion and through the frustoconical portion of the body (32).
  4. Gun according to any one of the preceding claims, characterised in that an enveloping surface (S32) of the body has a circular or elliptical cross-section.
  5. Gun according to any one of the preceding claims, characterised in that an enveloping surface (S32) of the body is cylindrical (S32a) and/or frustoconical (S32b) at least in part.
  6. Gun according to any one of the preceding claims, characterised in that an enveloping surface (S32) of the body comprises a cylindrical upstream portion (S32a) and a frustoconical downstream portion (S32b).
  7. Gun according to any one of the preceding claims, characterised in that the device (30) further comprises a gripping sleeve (36), which has a reduced diameter as compared with the body (32).
  8. Gun according to the preceding claim, characterised in that the length (I36) of the sleeve (36) is greater than or equal to 5 mm.
  9. Gun according to any one of the preceding claims, characterised in that the device is manufactured by 3D printing.
  10. Gun according to any one of the preceding claims, characterised in that the device and the nozzle are secured to one another or consist of a single piece.
  11. Gun according to any one of claims 1 to 10, characterised in that the device (30) is fixed inside a conduit (6) for the passage of fluid delimited by the nozzle (2), and in that the conduit (6) defines a housing (60, 62) for receiving the device (30), the shape of which housing is complementary to that of an enveloping surface (S32) of the body (32) of the device.
  12. Gun according to any one of the preceding claims, characterised in that the nozzle (2) delimits a conduit (6) for the passage of product, and in that the conduit (6) comprises a discharge portion which is flared and of rounded shape.
EP17190768.6A 2016-09-14 2017-09-13 Coating device Active EP3296022B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1658549A FR3055818A1 (en) 2016-09-14 2016-09-14 DEVICE FOR ROTATING A FLUID WITHIN A NOZZLE, ASSEMBLY COMPRISING SUCH DEVICE AND APPLICATION DEVICE

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EP3296022A1 EP3296022A1 (en) 2018-03-21
EP3296022B1 true EP3296022B1 (en) 2021-01-13

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US (1) US11097294B2 (en)
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JP (1) JP6959076B2 (en)
KR (1) KR102512019B1 (en)
CN (1) CN107812624A (en)
BR (1) BR102017017642A2 (en)
CA (1) CA2976569A1 (en)
ES (1) ES2851723T3 (en)
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Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6877174B2 (en) * 2017-02-20 2021-05-26 ニッタン株式会社 Disaster prevention indicator light
CN108325767A (en) * 2018-04-08 2018-07-27 南通凯顺生物科技有限公司 A kind of production technology of rotatable spray appliance
CN108906353B (en) * 2018-07-27 2019-10-29 江苏省中跃涂装设备有限公司 A kind of even application discharge port for spray robot
CN109228340A (en) * 2018-10-29 2019-01-18 共享智能铸造产业创新中心有限公司 A kind of print head applied to FDM printer
USD900966S1 (en) * 2019-03-06 2020-11-03 Krimelte Oü Nozzle for polyurethane foam gun
AU2020203722B2 (en) * 2019-06-21 2024-07-11 Engineering & Industrial Solutions Group Pty Ltd An improved pick back flushing spray for shearing drums
CN110193285B (en) * 2019-07-12 2024-06-21 中电华创(苏州)电力技术研究有限公司 Ammonia injection mixed flow device of SCR denitration system
CN111685158A (en) * 2020-05-07 2020-09-22 宁波英德菲尔机械科技有限公司 Fish-removing nerve gun and fish killing method
US20220305502A1 (en) * 2021-03-29 2022-09-29 Zyxogen, Llc Flow-focusing seed treatment device and methods
KR102494943B1 (en) * 2021-07-16 2023-02-06 주식회사 에스엠뿌레 Sprayer
CN113617551B (en) * 2021-10-09 2021-12-07 寿光市博达机械制造有限公司 Vortex type urea nozzle

Family Cites Families (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3123306A (en) * 1964-03-03 C bradley
FR1317768A (en) 1963-05-08
BE555294A (en) *
US2237842A (en) * 1938-12-16 1941-04-08 Harry M Reynolds Spraying device
US2908422A (en) * 1953-12-05 1959-10-13 Reischl & Co K G Atomizers
JPS53145215U (en) 1977-04-22 1978-11-15
US4375275A (en) * 1980-12-05 1983-03-01 Loctite Corporation High viscosity product dispenser
JPS596471A (en) * 1982-06-29 1984-01-13 Iwata Tosouki Kogyo Kk Shaft sealing device of sliding part
US4801051A (en) * 1984-03-26 1989-01-31 Nordson Corporation Flow control device for a fluid dispensing apparatus
US4582330A (en) * 1984-09-24 1986-04-15 Lew Hyok S Seal with cleft seating surface
US4953756A (en) * 1987-06-03 1990-09-04 Loctite Corporation Modular dispensing system
US4852773A (en) * 1987-12-28 1989-08-01 Jesco Products Company, Inc. Adjustable flow applicator for a positive displacement constant flow-rate dispenser
CN1047815A (en) 1989-06-03 1990-12-19 全苏铝镁电气工业科学研究所设计院 Device for atomizing liquid
US5072883A (en) * 1990-04-03 1991-12-17 Spraying Systems Co. Full cone spray nozzle with external air atomization
US5171613A (en) * 1990-09-21 1992-12-15 Union Carbide Chemicals & Plastics Technology Corporation Apparatus and methods for application of coatings with supercritical fluids as diluents by spraying from an orifice
US5277342A (en) * 1992-12-11 1994-01-11 Loctite Corporation Sealless dispensing apparatus
GB9611582D0 (en) * 1996-06-04 1996-08-07 Thin Film Technology Consultan 3D printing and forming of structures
US6460787B1 (en) * 1998-10-22 2002-10-08 Nordson Corporation Modular fluid spray gun
US6076744A (en) 1998-12-23 2000-06-20 Spraying Systems Co. Full cone spray nozzle
JP4441025B2 (en) 1999-12-15 2010-03-31 Ｈｏｙａ株式会社 Endoscope sprayer
US7762476B2 (en) 2002-08-19 2010-07-27 Illinois Tool Works Inc. Spray gun with improved atomization
RU82142U1 (en) 2008-12-19 2009-04-20 Андрей Михайлович Кривоносов MIXING GUN FOR SPRAYING HIGH REACTIVE COMPOSITIONS
KR20100088473A (en) 2009-01-30 2010-08-09 주식회사 엔엑스 A vortex type fluid injection nozzle and injection device using the same
KR101229696B1 (en) * 2009-12-30 2013-02-05 박근조 Spray gun
JP5689604B2 (en) 2010-01-29 2015-03-25 株式会社タカギ Mist nozzle
CN102205289B (en) 2010-03-31 2013-03-13 深圳华强智能技术有限公司 Atomizing sprayer
DE102011018640A1 (en) * 2010-04-28 2011-11-03 Wakol Gmbh Spray gun for the application of 2-component media and use of the spray gun according to the invention for the application of adhesives
DE102010051227A1 (en) 2010-11-12 2012-05-16 Dental Care Innovation Gmbh Nozzle for the emission of liquid cleaning agents with abrasive particles dispersed therein
DE202011003941U1 (en) 2011-03-14 2011-08-19 Sata Gmbh & Co. Kg Spray Gun
US8690080B2 (en) 2011-09-21 2014-04-08 Delavan Inc Compact high flow pressure atomizers
AU2012323301B2 (en) 2011-10-12 2016-03-24 3M Innovative Properties Company Spray head assemblies for liquid spray guns
US8524312B2 (en) 2011-11-16 2013-09-03 Csl Silicones Inc. Applicator for spraying elastomeric materials

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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US11097294B2 (en) 2021-08-24
KR102512019B1 (en) 2023-03-20
BR102017017642A2 (en) 2018-04-03
JP6959076B2 (en) 2021-11-02
RU2017131920A (en) 2019-03-14
CN107812624A (en) 2018-03-20
KR20180030392A (en) 2018-03-22
JP2018043235A (en) 2018-03-22
US20180071757A1 (en) 2018-03-15
FR3055818A1 (en) 2018-03-16
RU2017131920A3 (en) 2020-09-21
ES2851723T3 (en) 2021-09-08
CA2976569A1 (en) 2018-03-14
EP3296022A1 (en) 2018-03-21
RU2743569C2 (en) 2021-02-19

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