WO2021165835A1 - Tête pour pistolet à peinture - Google Patents

Tête pour pistolet à peinture Download PDF

Info

Publication number
WO2021165835A1
WO2021165835A1 PCT/IB2021/051312 IB2021051312W WO2021165835A1 WO 2021165835 A1 WO2021165835 A1 WO 2021165835A1 IB 2021051312 W IB2021051312 W IB 2021051312W WO 2021165835 A1 WO2021165835 A1 WO 2021165835A1
Authority
WO
WIPO (PCT)
Prior art keywords
head
calibrated
respect
central
spray head
Prior art date
Application number
PCT/IB2021/051312
Other languages
English (en)
Inventor
Andrea Orlandi
Original Assignee
Barnini S.R.L.
A.Pne.S S.R.L
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 Barnini S.R.L., A.Pne.S S.R.L filed Critical Barnini S.R.L.
Priority to EP21714005.2A priority Critical patent/EP4106927A1/fr
Publication of WO2021165835A1 publication Critical patent/WO2021165835A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • 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
    • 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
    • B05B1/306—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 the actuating means being a fluid
    • 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
    • B05B7/0081—Apparatus supplied with low pressure gas, e.g. "hvlp"-guns; air supplied by a fan
    • 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
    • B05B7/0838—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 single means controlling simultaneously the flow rates of shaping and spraying 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
    • B05B7/12—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
    • B05B7/1245—A gas valve being opened before a liquid valve
    • 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

Definitions

  • the present invention relates to a head for paint gun.
  • Automatic paint guns consist of a main body thereon a spray head is screwed.
  • the spray head is equipped with a series of calibrated holes which can have different angular tilts. Said holes are useful to atomize and to open the nebulized jet to form the spray fan.
  • the shape of the head which provides a pair of protrusions whereon some of the calibrated holes are implemented, causes, especially upon use, an important accumulation of painting product.
  • this product accumulated on the head has to be removed, to avoid that it could disturb the correct scattering and the correct atomization of the product itself during painting.
  • the object of the present invention is to solve the problems left unsolved by the known art, by providing a spray head as defined in claim 1.
  • the present invention further relates to a paint gun as defined in claim 4.
  • figure 1 is a perspective view of a gun with traditional head
  • figures 2A and 2B are a front view and a side view of the gun of figure 1 , respectively;
  • figure 3 is a section view taken along the line A-A of figure 2A;
  • figure 4 is a section view taken along the line B-B of figure 2A;
  • figure 5 is a side view of a spray head of known type
  • figure a 6 is a side view of a spray head according to the present invention.
  • figures 7A and 7B are a front view and a section view (taken along the line A-A of figure 7A) of a spray head according to the present invention, respectively;
  • figures 8A, 8B, 8C are front views of possible embodiments of a head according to the present invention.
  • figure 9 is a partial view of a paint gun, in section, with a spray head according to the present invention.
  • R3 Piston actuation air inlet
  • SC Contact and centering surfaces.
  • An automatic paint gun includes a main body 1 thereon a calibrated nozzle 2 is screwed which has to act as mechanical seal on the resting conus A to avoid the leakage of the pigment coming from the connection R1.
  • a closing rod 3 slides, which allows the passage and the adjustment of the pigment from the orifice of the nozzle 2.
  • a spray head 4, resting and centering on the nozzle 2 is provided with a series of holes, calibrated too, having different diameter, both on the plane and on the projections 14, which can have different angular tilts. Said holes are useful to atomize and open the nebulized jet to form the spray fan.
  • the head 4 is kept in centered and axial position with respect to the closing rod 3 and to the nozzle 2 by a threaded ferrule 9 screwed on the body itself.
  • the feeding of the ducts C1 and C2 takes place by inletting air from the connection R2, which feeds the distribution valve 5, by putting in pressure its chamber B2.
  • the air crosses the ducts C1 and C2 until outgoing from the calibrated holes of the head.
  • the piston by continuing its stroke, hooks and lifts the rod 3 which by freeing the orifice of the nozzle 2 allows the passage of the paint which is hit by the air previously released by the distribution valve 5.
  • the air of the duct C1 is useful to atomize the paint whereas the air of the duct C2 is useful to originate the fan.
  • these ducts are interrupted by a regulating valve 8 which is useful to dose the air quantity to be assigned to the single addresses, that is atomization and fan.
  • a regulating valve 8 which is useful to dose the air quantity to be assigned to the single addresses, that is atomization and fan.
  • one single regulating valve 8 is present which in this case intervenes on the fan width.
  • the hand wheel 6 rotates and rubs by means of the position snaps allowing the rod 3 to have a travel going from zero to the maximum opening of some millimetre, by determining the product capacity required for painting.
  • AIRLESS air-pressure guns
  • HVLP high-pressure gun
  • LVLP still lower pressure value
  • a spray head 10 is characterized by a substantially flat front spray surface SF and by the absence of the typical projections.
  • the calibrated holes are implemented on the front spray surface SF of the head according to various diameters and tilts, depending upon the use that the head itself has to carry out.
  • the central hole is designated which is useful to nebulize the liquid outgoing from the nozzle and with number 13 the holes are designated (preferably implemented in symmetric position with respect to the central hole 12) which by hitting the flow of the nebulized fluid, create the fan effect by further helping the jet atomization.
  • the interference calibrated holes 13 are arranged symmetrically with respect to the nebulization central calibrated hole 12 and angled with respect to the latter by an angle b.
  • the holes 13 on a head could be implemented, singularly or in groups, with angulations different therebetween, even in the same head, to implement the wished effect.
  • an embodiment according to the present invention allows to arrange the holes so as to obtain more effective configurations of the fan and to be able to decrease the turbulences appearing during the rotation of the painting system.
  • the front spray surface SF comprises a nebulization central calibrated hole 12, and a plurality of interference calibrated holes 13, tilted with respect to the central hole 12, arranged along two arcs of circle AC symmetrically arranged therebetween with respect to the nebulization central calibrated hole 12.
  • the spray head comprises a second plurality of interference calibrated holes 13’, tilted with respect to the central hole 12 too, and having smaller diameter than the interference calibrated holes 13, and arranged along two additional arcs of circle AC’ symmetrically arranged therebetween with respect to the nebulization central calibrated hole 12, at a smaller distance from said central calibrated hole 12 with respect to the arcs of circle AC.
  • figure 9 which represents a section of a head 10 according to the invention, mounted on a paint gun, it is possible to appreciate that, under working conditions, the head 10 houses its spherical surface inside a conical surface SC obtained on the nozzle.
  • a head according to the present invention results to be particularly suitable and advantageous for guns working at ultra-low pressure, preferably at pressure comprised between 0.2 and 0.9 bar.

Abstract

La présente invention concerne une tête de pulvérisation (10) pour pistolets à peinture, comprenant un corps sensiblement cylindrique avec une surface de pulvérisation avant (SF) sensiblement plate pour son extension totale et sans parties saillantes faisant saillie à partir de ladite surface de pulvérisation avant (SF), ladite surface de pulvérisation avant (SF) portant une pluralité de trous calibrés (13), en communication avec des conduits d'alimentation correspondants formés dans le corps de la tête de pulvérisation (10).
PCT/IB2021/051312 2020-02-18 2021-02-17 Tête pour pistolet à peinture WO2021165835A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21714005.2A EP4106927A1 (fr) 2020-02-18 2021-02-17 Tête pour pistolet à peinture

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT202020000000761 2020-02-18
IT202020000000761U IT202000000761U1 (it) 2020-02-18 2020-02-18 Testina per pistola di verniciatura

Publications (1)

Publication Number Publication Date
WO2021165835A1 true WO2021165835A1 (fr) 2021-08-26

Family

ID=75173390

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2021/051312 WO2021165835A1 (fr) 2020-02-18 2021-02-17 Tête pour pistolet à peinture

Country Status (3)

Country Link
EP (1) EP4106927A1 (fr)
IT (1) IT202000000761U1 (fr)
WO (1) WO2021165835A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4309800A1 (fr) * 2022-07-18 2024-01-24 Aircom Srl Pistolet de peinture muni d'une buse améliorée

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB409822A (en) * 1932-12-15 1934-05-10 Metal Box Co Ltd Improvements in or relating to spraying devices
WO2007024381A2 (fr) * 2005-08-26 2007-03-01 Spraying Systems Co. Ensemble buse de pulverisation par atomisation d'air melange externe ameliore
EP2468413A2 (fr) * 2010-12-24 2012-06-27 Eisenmann AG Dispositif et procédé destinés au revêtement d'un objet à l'aide d'un fluide
DE102011079982A1 (de) * 2011-07-28 2013-01-31 Frimo Group Gmbh Sprühkopf für reaktive Kunststoffe
US20160199869A1 (en) * 2013-08-13 2016-07-14 Sames Technologies Sprayer for a liquid coating product and spraying facility comprising such a sprayer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB409822A (en) * 1932-12-15 1934-05-10 Metal Box Co Ltd Improvements in or relating to spraying devices
WO2007024381A2 (fr) * 2005-08-26 2007-03-01 Spraying Systems Co. Ensemble buse de pulverisation par atomisation d'air melange externe ameliore
EP2468413A2 (fr) * 2010-12-24 2012-06-27 Eisenmann AG Dispositif et procédé destinés au revêtement d'un objet à l'aide d'un fluide
DE102011079982A1 (de) * 2011-07-28 2013-01-31 Frimo Group Gmbh Sprühkopf für reaktive Kunststoffe
US20160199869A1 (en) * 2013-08-13 2016-07-14 Sames Technologies Sprayer for a liquid coating product and spraying facility comprising such a sprayer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4309800A1 (fr) * 2022-07-18 2024-01-24 Aircom Srl Pistolet de peinture muni d'une buse améliorée

Also Published As

Publication number Publication date
EP4106927A1 (fr) 2022-12-28
IT202000000761U1 (it) 2021-08-18

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