EP2054161B1 - Pistolet automatique de pulverisation - Google Patents

Pistolet automatique de pulverisation Download PDF

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Publication number
EP2054161B1
EP2054161B1 EP07803821A EP07803821A EP2054161B1 EP 2054161 B1 EP2054161 B1 EP 2054161B1 EP 07803821 A EP07803821 A EP 07803821A EP 07803821 A EP07803821 A EP 07803821A EP 2054161 B1 EP2054161 B1 EP 2054161B1
Authority
EP
European Patent Office
Prior art keywords
product
needle
elastic sealing
sprayed
sealing means
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
EP07803821A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2054161A1 (fr
Inventor
Patrick Ballu
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 EP2054161A1 publication Critical patent/EP2054161A1/fr
Application granted granted Critical
Publication of EP2054161B1 publication Critical patent/EP2054161B1/fr
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    • 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
    • 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
    • B05B7/02—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

Definitions

  • the invention relates to an automatic spray gun for spraying a product such as an abrasive paint, a lacquer, an enamel, water-soluble or dissolved in a solvent.
  • the invention is particularly useful for high pressure and high frequency spraying of ultraviolet radiation curable paints.
  • This type of automatic pistol comprises a pressurized propellant gas chamber supplied with pressurized propellant gas, generally compressed air, and a product chamber fed with pressurized sprays.
  • a spray nozzle of the pressurized spray product is connected to the product chamber.
  • the product is fed to the front of the gun and exits through a calibrated orifice of the nozzle.
  • a slide through the gas chambers and product and provided at its front end with a needle able to close said nozzle.
  • the opening of the needle is triggered by the action of the propellant, usually compressed air.
  • actuating means generally a pneumatic cylinder, adapted to move in translation to close off or disengage said nozzle.
  • the pneumatic cylinder comprises a piston biased in the closed position by a spring and moved into the open position by the propellant.
  • the propellant gas which is used for spraying, aids in the atomization of the product through the central orifice of the nozzle and forms a concentric jet of orientation formed by peripheral vents.
  • an offset is provided to open the spray air before ejection of the product and to ensure the closure of the nozzle before closing the spray air.
  • the surface of the slider is in contact with the product to be sprayed, which is often abrasive and / or corrosive, as is the case, for example, with enamel.
  • the sealing means may be static or deformable: the static means may be o-rings, scraper seals or similar chevron stops, while the deformable means may comprise a bellows, a membrane or other flexible surface mounted between a fixed part and a moving part of the gun.
  • the document FR 2 863 512 in accordance with the preamble of claim 1, thus describes an automatic spray gun having a flexible bellows on the side of the chamber of product to be sprayed.
  • This flexible bellows is attached to the gun body at its rear end and has a movable front end forming a seal around the needle.
  • the needle comprises a shoulder cooperating with the seal formed by the front end of the bellows.
  • the gun of the document FR 2 863 512 however, has a bellows with turns whose surface is difficult to rinse and clean, especially in the recesses and recesses between the turns.
  • EP 1063018 an automatic membrane gun in which the needle is secured to the membrane and passes therethrough, so as to be connected to a pulsation control member.
  • a first object of the invention is to improve the known state of the art, by providing a new automatic spray gun for the spraying of a product such as an abrasive paint, a lacquer, an enamel, water-soluble or dissolved in a solvent. , easy to rinse and clean.
  • a second object of the invention is to provide a new automatic spray gun for spraying a product such as an abrasive paint, a lacquer, an enamel, water-soluble or dissolved in a solvent, wherein the sealed oscillating means have a low surface in contact with the product to be sprayed.
  • a third object of the invention is to provide a new automatic spray gun for spraying a product such as an abrasive paint, a lacquer, an enamel, water-soluble or dissolved in a solvent, wherein a protective coating of the oscillating means waterproof is no longer essential.
  • the invention relates to an automatic spray gun for spraying a product such as an abrasive paint, a lacquer, an enamel, water-soluble or dissolved in a solvent, comprising a body with a front part defining a chamber of product to be sprayed and a rear part for controlling and admitting propellant, a spray head and a product ejection nozzle controlled by a displaceable needle, and means for controlling the displacement of the needle, an elastic sealing means surrounding the needle between the product to be sprayed and the propellant, being mounted clamped between the front and rear parts of the body, characterized in that the elastic sealing means has an elongated tubular conformation whose inner surface is adjusted to the diameters of the needle and a control slide mounted on the needle for the displacement thereof, to contain the pressure of the product to pulptimiser.
  • a product such as an abrasive paint, a lacquer, an enamel, water-soluble or dissolved in a solvent
  • a body with a front part defining a chamber of
  • an automatic pistol comprises a front portion and a rear portion 1b, at least one of which, 1a or 1b, is made of light metal.
  • the front portion 1a contains a cylindrical sleeve 2 made of abrasion-resistant material, for example stainless steel, which screw-threadedly receives a spray head 3.
  • a cylindrical sleeve 2 made of abrasion-resistant material, for example stainless steel, which screw-threadedly receives a spray head 3.
  • the spray head 3 has a central orifice 3a and a plurality of peripheral orifices 3b or 3c. Through the product outlet orifice 3a and the thrust-gas outlet orifices 3b or 3c, spraying of the product is obtained by spraying the product fed into the gun under constant pressure, in combination with a spraying air supply which in addition to spraying, it makes it possible to adjust the shape and / or the dimensions of the jet of sprayed product.
  • the spray gun according to the invention comprises means for supplying spray air opening near the spray nozzle 4 to improve the spray and to form the jet of the product.
  • the atomizing air is supplied independently of the product outlet by means of a mechanical shift which feeds the atomizing air into an annular chamber formed in the spray head and which communicates with the first set of orifices 3b. or air nozzles opening close to the outlet 3a of the nozzle 4 and with a second set of orifices 3c located in a ring placed at the front end of the gun body.
  • This arrangement allows the orifices of this second set of orifices 3c to direct the spray air jets at a much greater angle to the jet of the product exiting the nozzle 4.
  • the nozzle 4 is shaped as a ball valve 5 constituting an interchangeable module by screwing into the cylindrical jacket 2.
  • the product to be sprayed is fed under constant pressure through a pipe into a feed chamber 7 of product arranged in the front part of the gun and having a substantially cylindrical ring shape and opening directly into a central channel 8 of the spray head 3 which connects the product supply chamber 7 to a spray nozzle 4.
  • the automatic gun uses a needle 9 which closes the outlet of the product through the nozzle 4.
  • the withdrawal of the needle 9 to clear this outlet is controlled by pneumatic control means acting on the piston 10 of a cylinder 11 moving the needle 9 rearwardly.
  • pneumatic control means acting on the piston 10 of a cylinder 11 moving the needle 9 rearwardly.
  • a return spring 12 acts on the piston 10 in the opposite direction to move the needle 9 forward to close the outlet of the product.
  • the spray gun is also provided with means for supplying spray air opening near the spray nozzle 4.
  • These spray air supply means comprise a compressed air pipe connected to an air duct opening into a generally circular air inlet chamber 17 arranged around a valve 16 in the rear part 1b of the body. of the pistol.
  • This air inlet chamber 17 is, via successive annular passages 18 in communication and which extend in the rear parts 1b and before the body, connected to an outer circular chamber 19 arranged in the head 3 spray.
  • This outer chamber 19 is in communication with the atmosphere through the orifices 3b or 3c opening to the front face of the spray head 4.
  • the control piston 10 of the needle 9 is surrounded by a piston 10a coaxial with the piston 10 and prestressed in the closed position by a spring 12a.
  • the forward end of the piston 10a tapers to form a valve valve 16 applied to a seat, formed in or integral with the rear portion 1b, by the pressure of the spring 12a.
  • a predetermined set of displacements is provided between the piston 10 and the piston 10a, so that the movement of the piston 10 is controlled in both directions with a shift by a movement of the piston 10a, at the opening as at the closing.
  • connection between the needle 9 and the piston 10 is provided by a connecting slider 14 passing through the front and rear portions 1b of the gun body.
  • the slider 14 is shaped as a rod screwed at its front end to the needle 9 and secured at its rear end to the piston 10 and to a support plate of the spring 12.
  • the slider 14 is mounted on the needle 9 so as to trap a conformation before 13a of a resilient sealing member 13 against a shoulder 9a of the needle 9 and to prestress in compression the sealing member 13.
  • the rear end 13b of the elastic sealing member 13 is clamped between the front portion or the liner 2 of stainless steel and the rear portion 1b of the gun body to provide a recess and a static seal.
  • the elongation and shortening of the member 13 can be performed at high operating frequencies, close to 2 Hz, while ensuring a lifetime of 10 million cycles at high pressures of the order of 120 bar.
  • the elastic sealing member 13 has an elongated tubular conformation, whose inner surface is adjusted to the diameters of the needle and the slide, to contain the pressure exerted by the product to be sprayed on the outer surface of the member 13.
  • the elongate sealing member 13 is constituted in the form of a tubular sleeve with two ends 13a, 13b bulged.
  • the front end 13a is bulged radially internally, while the rear end 13b is bulged radially outwardly.
  • the stroke of the needle 9 is low, of the order of two millimeters.
  • the variation of the radial dimensions is even smaller of the order of one tenth of a millimeter, which allows the use at high operating frequencies, of the order of 2 Hz.
  • the continuously concave shape of the outer surface of the sealing member 13 facilitates the rinsing and cleaning of this outer surface and eliminates the rinsing and cleaning difficulties encountered with the bellows and membranes of the prior art.
  • the substantially cylindrical shape of the outer surface of the sleeve 13 also reduces the area in contact with the product to be sprayed, compared with the bellows and membranes of the prior art.
  • the material used for the manufacture of the sleeve 13 may be a polyurethane, in the case of a specification of resistance to water-soluble products.
  • Polyurethanes are economical and easy to form, preferably by molding, or possibly by machining.
  • the sleeve 13 may be made of perfluoroelastomer material with high chemical inertness.
  • a perfluoroelastomer used is a perfluoroelastomer specially formulated for high pressure medium and explosive decompression conditions, which is satisfactory.
  • the material used for the sleeve 13 may be modified without departing from the scope of the present invention and may optionally be composed of a metallic or non-metallic material.

Landscapes

  • Nozzles (AREA)
  • Sorption Type Refrigeration Machines (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
EP07803821A 2006-07-03 2007-06-29 Pistolet automatique de pulverisation Active EP2054161B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0606007A FR2903027B1 (fr) 2006-07-03 2006-07-03 Pistolet automatique de pulverisation
PCT/FR2007/001112 WO2008003850A1 (fr) 2006-07-03 2007-06-29 Pistolet automatique de pulverisation

Publications (2)

Publication Number Publication Date
EP2054161A1 EP2054161A1 (fr) 2009-05-06
EP2054161B1 true EP2054161B1 (fr) 2012-02-01

Family

ID=37865863

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07803821A Active EP2054161B1 (fr) 2006-07-03 2007-06-29 Pistolet automatique de pulverisation

Country Status (8)

Country Link
US (1) US8205807B2 (zh)
EP (1) EP2054161B1 (zh)
JP (1) JP5181256B2 (zh)
CN (1) CN101489685B (zh)
AT (1) ATE543574T1 (zh)
ES (1) ES2380826T3 (zh)
FR (1) FR2903027B1 (zh)
WO (1) WO2008003850A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111347821A (zh) * 2020-04-26 2020-06-30 雷文浩 美术用喷绘枪

Families Citing this family (9)

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Publication number Priority date Publication date Assignee Title
TWI430844B (zh) * 2007-06-14 2014-03-21 Graco Minnesota Inc 縱向膨脹密封件
JP2009220034A (ja) * 2008-03-17 2009-10-01 Asahi Sunac Corp 塗装ガン
FR2971019B1 (fr) * 2011-01-27 2016-01-15 Exel Ind Dispositif et systeme de surveillance d'une pompe a actionnement pneumatique a deplacement lineaire alternatif.
US8708246B2 (en) * 2011-10-28 2014-04-29 Nordson Corporation Positive displacement dispenser and method for dispensing discrete amounts of liquid
JP6531939B2 (ja) * 2015-04-09 2019-06-19 アネスト岩田株式会社 自動スプレーガン
US10518284B2 (en) * 2015-08-04 2019-12-31 Intelligent Agricultural Solutions Llc Interactive liquid spraying system and method
CN107930899B (zh) * 2017-12-19 2020-04-21 南通航运职业技术学院 一种可调节式自动喷油阀
CN110479514B (zh) * 2019-09-09 2024-08-06 合肥中科力一科技有限公司 一种用于雾化仪的导杆式二流体喷头装置
CN113695101B (zh) * 2021-09-28 2024-02-13 浙江海洋大学 一种用于电弧增材制造的自动涂覆活性剂装置

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GB2194822A (en) * 1986-09-05 1988-03-16 Grace W R & Co Dispensing gun seal
US5190219A (en) * 1991-10-03 1993-03-02 Copp Jr William H Automatic spray gun
JP3256632B2 (ja) * 1994-06-27 2002-02-12 アネスト岩田株式会社 ２液ポリエステル自動ガン
EP0736462B1 (en) * 1994-11-17 2005-09-14 Yoshino Kogyosho Co., Ltd. Container equipped with bubble injection pump
FR2795347B1 (fr) * 1999-06-23 2001-08-03 Exel Ind Pistolet automatique a membrane pour la pulverisation d'un produit
US6264113B1 (en) * 1999-07-19 2001-07-24 Steelcase Inc. Fluid spraying system
DE10038408A1 (de) * 2000-08-07 2002-02-21 Nordson Corp Verfahren und Vorrichtung zum Auftragen von Fluid auf ein Substrat, insbesondere Klebstoff auf Hygieneartikel
JP2002243062A (ja) * 2000-12-13 2002-08-28 Abb Kk 塗料用開閉弁
WO2004035222A2 (en) * 2002-10-15 2004-04-29 Spraying Systems, Co. External mix air assisted spray nozzle assembly
US6874708B2 (en) * 2003-02-13 2005-04-05 Illinois Tool Works Inc. Automatic air-assisted manifold mounted gun
CN2616303Y (zh) * 2003-04-23 2004-05-19 周汝福 皮革自动喷枪
CN2626621Y (zh) * 2003-06-28 2004-07-21 梁小恩 机动喷雾器自动回水控制阀
FR2863512B1 (fr) * 2003-12-10 2006-01-21 Itw Surfaces & Finitions Pistolet automatique de pulverisation
FR2872717B1 (fr) * 2004-07-12 2006-09-15 Itw Surfaces & Finitions Sa Pistolet de pulverisation automatique comprenant un corps de pulverisation monte sur une embase d'alimentation
WO2006065588A2 (en) * 2004-12-15 2006-06-22 3M Innovative Properties Company Elastomer seals for use in medicinal aerosol devices

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111347821A (zh) * 2020-04-26 2020-06-30 雷文浩 美术用喷绘枪

Also Published As

Publication number Publication date
JP2009541048A (ja) 2009-11-26
WO2008003850A1 (fr) 2008-01-10
JP5181256B2 (ja) 2013-04-10
ES2380826T3 (es) 2012-05-18
EP2054161A1 (fr) 2009-05-06
ATE543574T1 (de) 2012-02-15
FR2903027B1 (fr) 2008-11-14
CN101489685A (zh) 2009-07-22
CN101489685B (zh) 2012-05-30
FR2903027A1 (fr) 2008-01-04
US8205807B2 (en) 2012-06-26
US20090283610A1 (en) 2009-11-19

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