EP0063707A1 - Plural component spray gun - Google Patents

Plural component spray gun Download PDF

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Publication number
EP0063707A1
EP0063707A1 EP82102739A EP82102739A EP0063707A1 EP 0063707 A1 EP0063707 A1 EP 0063707A1 EP 82102739 A EP82102739 A EP 82102739A EP 82102739 A EP82102739 A EP 82102739A EP 0063707 A1 EP0063707 A1 EP 0063707A1
Authority
EP
European Patent Office
Prior art keywords
needle valve
gun
passage
component
needle
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.)
Withdrawn
Application number
EP82102739A
Other languages
German (de)
English (en)
French (fr)
Inventor
Chester H. Baranowski
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.)
Binks Sames Corp
Original Assignee
Binks Sames Corp
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 Binks Sames Corp filed Critical Binks Sames Corp
Publication of EP0063707A1 publication Critical patent/EP0063707A1/en
Withdrawn legal-status Critical Current

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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
    • 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

Definitions

  • the present invention relates to spray guns for mixing and dispensing plural component materials, such for example as polyurethane foam, and in particular to an improved plural component gun wherein mixing occurs externally of the gun so that flushing of the gun is not required when spraying is stopped.
  • plural component materials such for example as polyurethane foam
  • Prior art plural component spray guns usually mix the components internally of the gun,and one problem which arises in their use is that, between operations, the residual material in a mixing chamber and/or outlet nozzle of the gun tends to harden and jam the outlet, thereby making further mixing and dispensing impossible until the chamber and nozzle are purged of the hardened residue.
  • Purging may be accomplished, for example, by manually opening a valve to admit a flow of solvent and/or air through the chamber and nozzle to remove the residue.
  • the primary object of the present invention is to provide an improved plural component air atomization spray gun, constructed to maintain the components separate from one another while within the gun and to mix the components only after they have been dispensed to exterior of the gun.
  • a plural component spray gun comprises a gun body having a passage therein opening upon a forward end of said body and a valve seat in said passage, and a needle valve reciprocable in said passage between a forward position against and a rearward position away from said valve seat, said needle valve having a passage longitudinally therein opening upon seid forward end of said body. Also included are means for moving said needle valve between said forward and rearward positions; means for introducing a first fluidic component into said body passage and around said needle valve; and means, responsive upon said needle valve being 'in said rearward position, for introducing a second component into said needle valve passage.
  • a paint spray gun assembly including a spray gun 22 having a handle 24 connected at a lower end thereof with a source of compressed air (not shown) through a fitting'26 and an air supply line 28.
  • the gun includes an air nozzle 30 and fluid nozzle means 32 centrally located in the'air nozzle, through which first and second components, provided to the gun from supplies thereof (not shown) through respective component supply lines 34 and 36, are dispensed from the fluid nozzle for being atomized into a spray and formed into a fan-shaped pattern by jets of air emitted from the air nozzle.
  • the gun To control the spraying operation, the gun includes an air valve means 38 movable between open and closed positions to control a flow of pressurized air through the gun, a fluid valve stem 40 movable between open and closed positions to control a flow of components through the fluid nozzle and a manually manipulatable trigger 42 operably connected with the valve means 38 and stem 40.
  • the trigger is pivotally mounted at an upper end by a pivot pin 44 and is manually movable between a gun off position away from the handle whereat the air valve means and fluid valve are closed, to a g un on position toward the handle whereat the air valve means and fluid valve are open and a spray of material is emitted from the gun.
  • An air control knob 46 is adjustable to control the amount of atomizing air when the gun is on and a fluid control knob 48 is adjustable to control the rate of dispensing of material.
  • the spray gun assembly as thus far-described is known in the art and, if conventional, would mix the components within a chamber in the gun prior to dispensing the same. Consequently, the gun would have to be purged of material each and every time use were discontinued to prevent hardening of residual material within the gun. This would disadvantageously create not only a need for a supply of solvent to purge the gun, but also for an additional flush pump and a solvent line running to the gun. In addition, it often happens that an operator is not in a position where solvent may conveniently be flushed through the gun, for example when he is working directly over material that has already been sprayed.
  • the particular structure of the gun of the invention enables two components to be maintained separate within and mixed only externally of the gun. This is accomplished by providing a ported and hollow needle valve in the gun, introducing one of the components into the gun and around the needle and the other component into the g un and through the port to the interior of the needle. When the gun is off, the forward end of the needle seats against the fluid nozzle means to prevent spraying of the one component and the port in the needle is sealed off from the supply of the other component.
  • the gun is triggered to retract the needle and move the forward end of the needle from its seat with the fluid nozzle means and to position the port in communication with the supply of the other component,.whereby both components are emitted from the gun for mixing, the one through the space between the needle and nozzle and the other through an opening at the forward end of the needle. Consequently, the components. are mixed only after they have been dispensed to exterior of the gun, so that cleaning of the gun is not required when spraying is stopped.
  • Positive displacement pumps may be used to provide exact ratios of the components under pressure to the gun, and the air jets emitted by the air nozzle atomize the components into a spray and form the same into a fan-shaped pattern.
  • the air nozzle 30 is mounted on a forward body portion 50 of the spray gun 22 by a nozzle retaining ring 52.
  • the body portion has ,an air passage 54 which receives air under pressure upon opening of the air valve means 38, and an air valve stem. 56 extends through the passage and against a seat 58 at a forward end thereof.
  • the air valve stem is connected with the trigger 42 for being retracted when the gun is turned on, with the amount of retraction being determined by the setting of the air control knob 46, and when retracted establishes communication between the passage 54-and a passage 60 leading both to pattern forming air outlet orifices 62 in opposed ears or wings of the air nozzle 30 and to an annular atomizing air orifice 64 around the fluid nozzle means.
  • triggering the gun causes air to be discharged for atomizing dispensed material into a spray and forming the spray into a fan-shaped pattern.
  • the fluid nozzle means 32 includes a hollow and ported needle valve 66 in the forward body portion 50.
  • a passage 68 extends longitudinally through the needle from a forward open end thereof to a rearward closed end, and one or more circumferentially spaced ports 70 are formed through the needle in communication with the passage.
  • the needle valve extends through and is reciprocable within a generally cylindrical fluid.nozzle body 72 of the fluid nozzle means, and is provided with a taper 74 at its forward end for movement against a valve seat 76 interior of the body 72.
  • the rearward end of the needle connects with the valve stem 40, such that operation of the trigger to turn on the gun retracts the needle from the seat.
  • the supply line 34 communicates with an inlet 78 to the gun and the supply line 36-with an inlet 80.
  • the component introduced at the inlet 78 shall be called the "A” component and that at the inlet 80 the "B" component.
  • the "A” component could, by way of example, be isocyanate and the "B” component polyol, although it is understood that the gun could just as readily be used to dispense plural component paint or other plural component materials.
  • the inlet 78 communicates with a chamber 82 defined between the nozzle body 72 and the forward gun body 50, and a plurality of circumferentially spaced passages 84 through the nozzle body communicate between the chamber and the needle 66. Consequently, component "A" introduced at the inlet flows into the chamber and through the passages into a generally cylindrical space 86 between the inner surface of the nozzle body and the outer surface of the needle, and an annular seal or gland 88 at the rearward end of the chamber, along with a seal 90 defined by mating shoulders of the nozzle body and the gun body at a forward end of the chamber, seal the sides of the chamber.
  • the component is supplied to the gun under pressure, and when the gun is off and the needle seated against the valve seat 76, the component is confined : within the space 86. However, when the gun is triggered on, the needle is retracted from the valve seat and the component is dispensed from the nozzle means through an annular orifice 91 defined between the needle and the nozzle body.
  • the inlet 80 communicates with a chamber 92 between a cylindrical sleeve 94 and the gun body 50.
  • the sleeve is positioned around the needle 66 and sealed at its side ends by a pair of annular seals or glands 96, and the needle is reciprocable within the sleeve and seals.
  • a plurality of passages 98 are formed through the sleeve between the chamber 92 and an inner annular chamber 100 defined between the sleeve and the needle, and the ports 70 are located on the needle so that, when the gun is off and the needle is in its forward position, the ports are against and closed by the forward seal 96, the seal precluding any communication between the ports and the chamber 100.
  • the component Upon introduction of the'component "B" through the inlet 80, the component enters the chamber 92 and flows through the passages 98 into the inner chamber 100 about the needle 66, the seals 96 precluding a lateral flow of the component from the side ends of the chambers.
  • the component When the gun is off and the needle in its forward position, the component is confined within the chambers. However, when the gun is triggered on and the needle retracted, the ports 70 are moved rearwardly away from the sealing surface of the forward seal 96 and into communication with the annular chamber 100, whereupon the component flows through the ports and into and through the needle passage 68 for being dispensed from the gun through a. forward open end or orifice 102 of the needle passage.
  • the particular structure of the gun precludes any mixing of the "A" and "B” components within the gun, with mixing occurring only after the components are dispensed from the gun and atomized into a spray by the atomizing air.
  • the gun when the gun is turned on the. component "A” is dispensed immediately upon retraction of the tapered end 74 of the needle 66 from the valve seat 76.
  • the time at which the "B” component begins to be dispensed with respect to the time at which dispensing of the "A” component commences may be determined by controlling the longitudinal position of the ports 70 along the needle_66 and/or the width of the forward seal 96 or its longitudinal placement with respect to the ports.
  • the ports 70 may be exposed to the chamber 100 substantially immediately upon movement of the needle from the valve seat 76, whereby "A" and "B" components will be sprayed simultaneously.
  • the ports may be exposed to the chamber only after the needle has been moved from the seat, whereby spraying of the "A” component will commence before and end after spraying of the "B” component.
  • the latter arrangement would be preferable, for example, if some dripping of the components occurs at the outlet from the gun when the gun is first turned off, since immediately prior to gun turn off only the "A” component would flow, thereby- cleansing the forward end of the gun of any mixture of the components and precluding hardening of the components on the gun.
  • the invention thus provides an improved plural component spray gun assembly, wherein the components are never intermixed internally of the gun, but only externally, so that no hardening or setting of the components occurs in the gun and flushing of the gun is not required when spraying is stopped. Consequently, in use of the gun there is no need for a supply of solvent for the gun or for an additional flush pump and solvent line running to the gun.

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  • Nozzles (AREA)
EP82102739A 1981-04-29 1982-03-31 Plural component spray gun Withdrawn EP0063707A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US25857881A 1981-04-29 1981-04-29
US258578 2008-10-27

Publications (1)

Publication Number Publication Date
EP0063707A1 true EP0063707A1 (en) 1982-11-03

Family

ID=22981184

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82102739A Withdrawn EP0063707A1 (en) 1981-04-29 1982-03-31 Plural component spray gun

Country Status (2)

Country Link
EP (1) EP0063707A1 (ja)
JP (1) JPS58263A (ja)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0118635A2 (en) * 1983-03-14 1984-09-19 Frank Ives External mixing spray gun
WO1985001894A1 (en) * 1983-10-27 1985-05-09 Icab Industrial Coating Ab A process for use with a spraying nozzle, and an arrangement for carrying out the process
EP0192097A2 (de) * 1985-02-19 1986-08-27 Kopperschmidt-Mueller GmbH & Co KG Verfahren zum Beschichten von Gegenständen mit Hilfe eines Sprühstrahls und Zerstäubungsvorrichtung zur Durchführung dieses Verfahrens
EP0287043A2 (de) * 1987-04-16 1988-10-19 C. Ehrensperger Ag Pistole für Mehrkomponentenmaterial
EP0718042A1 (en) * 1994-12-08 1996-06-26 Ransburg Corporation Two component external mix spray gun
EP0903211A2 (en) * 1997-09-19 1999-03-24 Rigo S.r.l. Self-cleaning gun for delivering a polyurethane foamed material
WO2004020111A1 (en) * 2002-08-30 2004-03-11 Nordson Corporation Liquid spray method
WO2007068014A3 (de) * 2005-12-15 2007-08-02 Josef Mikl Sprühpistole
FR2939336A1 (fr) * 2008-12-04 2010-06-11 Multispe France Procede d'assemblage de produits chimiques et d'application par projection d'un revetement de protection et/ou d'isolation des rails et/ou installations ferroviaires contre les courants vagabonds
WO2011100003A1 (en) 2010-02-15 2011-08-18 E.I. Du Pont De Nemours And Company Two-component spray device and use thereof
US20120100296A1 (en) * 2009-06-25 2012-04-26 E. I. Du Pont De Nemours And Company Gravity fed spray device and methods for spraying multiple components
US20120141683A1 (en) * 2009-06-25 2012-06-07 E.I. Du Pont De Nemours And Company Spray device for coating and use thereof
US20120288631A1 (en) * 2010-02-15 2012-11-15 E I Du Pont De Nemours And Company Method for spraying two-component compositions
EP2536509A1 (en) * 2010-02-15 2012-12-26 E.I. Du Pont De Nemours And Company Two-component spray device and use thereof
JP2013537470A (ja) * 2010-05-28 2013-10-03 サタ ゲーエムベーハー アンド カンパニー カーゲー スプレー器具用ノズルヘッド
US8807460B2 (en) 2009-04-28 2014-08-19 Finishing Brands Holdings Inc. Fluid through needle for applying multiple component material
US8973522B2 (en) 2011-03-14 2015-03-10 Axalta Coating Systems Ip Co., Llc Dual feeding spray device and use thereof
WO2022042710A1 (zh) * 2020-07-07 2022-03-03 宁波江辉电器科技有限公司 一种双流道结构以及喷枪

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6033900B2 (ja) * 1982-02-22 1985-08-06 庄野 民枝 ジクロルエテニル化合物の製造法
JP2008126173A (ja) * 2006-11-22 2008-06-05 Honda Motor Co Ltd 塗布装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2780496A (en) * 1952-11-29 1957-02-05 Sherwin Williams Co Multi-component spray gun
DE1034076B (de) * 1955-03-22 1958-07-10 Walther Fa Richard C Spritzpistole mit zwei konzentrischen Ringduesen und einer zurueckziehbaren absperrbaren Hohlnadel
US3232540A (en) * 1963-07-17 1966-02-01 Cassanmagnago Ugo Spray gun for two-component paints, with separate concentrical nozzles

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2780496A (en) * 1952-11-29 1957-02-05 Sherwin Williams Co Multi-component spray gun
DE1034076B (de) * 1955-03-22 1958-07-10 Walther Fa Richard C Spritzpistole mit zwei konzentrischen Ringduesen und einer zurueckziehbaren absperrbaren Hohlnadel
US3232540A (en) * 1963-07-17 1966-02-01 Cassanmagnago Ugo Spray gun for two-component paints, with separate concentrical nozzles

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0118635A2 (en) * 1983-03-14 1984-09-19 Frank Ives External mixing spray gun
EP0118635A3 (en) * 1983-03-14 1985-07-31 Frank Ives External mixing spray gun
WO1985001894A1 (en) * 1983-10-27 1985-05-09 Icab Industrial Coating Ab A process for use with a spraying nozzle, and an arrangement for carrying out the process
EP0192097A2 (de) * 1985-02-19 1986-08-27 Kopperschmidt-Mueller GmbH & Co KG Verfahren zum Beschichten von Gegenständen mit Hilfe eines Sprühstrahls und Zerstäubungsvorrichtung zur Durchführung dieses Verfahrens
EP0192097A3 (en) * 1985-02-19 1987-08-05 Kopperschmidt-Mueller Gmbh & Co Kg Method for spray coating objects, and spray gun for carrmethod for spray coating objects, and spray gun for carrying out this method ying out this method
EP0287043A2 (de) * 1987-04-16 1988-10-19 C. Ehrensperger Ag Pistole für Mehrkomponentenmaterial
EP0287043A3 (en) * 1987-04-16 1989-08-09 C. Ehrensperger Ag Gun for a multi-component product
US4955544A (en) * 1987-04-16 1990-09-11 C. Ehrensperger Ag Dosage gun
EP0718042A1 (en) * 1994-12-08 1996-06-26 Ransburg Corporation Two component external mix spray gun
EP0903211A2 (en) * 1997-09-19 1999-03-24 Rigo S.r.l. Self-cleaning gun for delivering a polyurethane foamed material
EP0903211A3 (en) * 1997-09-19 2000-04-19 Rigo S.r.l. Self-cleaning gun for delivering a polyurethane foamed material
WO2004020111A1 (en) * 2002-08-30 2004-03-11 Nordson Corporation Liquid spray method
CN101330981B (zh) * 2005-12-15 2011-07-20 约瑟夫·米基 喷枪
WO2007068014A3 (de) * 2005-12-15 2007-08-02 Josef Mikl Sprühpistole
FR2939336A1 (fr) * 2008-12-04 2010-06-11 Multispe France Procede d'assemblage de produits chimiques et d'application par projection d'un revetement de protection et/ou d'isolation des rails et/ou installations ferroviaires contre les courants vagabonds
US8807460B2 (en) 2009-04-28 2014-08-19 Finishing Brands Holdings Inc. Fluid through needle for applying multiple component material
US9675983B2 (en) 2009-04-28 2017-06-13 Carlisle Fluid Technologies, Inc. Fluid through needle for applying multiple component material
US9586221B2 (en) 2009-04-28 2017-03-07 Carlisle Fluid Technologies, Inc. Fluid through needle for applying multiple component material
US20120100296A1 (en) * 2009-06-25 2012-04-26 E. I. Du Pont De Nemours And Company Gravity fed spray device and methods for spraying multiple components
CN102481590A (zh) * 2009-06-25 2012-05-30 纳幕尔杜邦公司 重力送料式喷涂装置以及用于喷涂多组分的方法
US20120141683A1 (en) * 2009-06-25 2012-06-07 E.I. Du Pont De Nemours And Company Spray device for coating and use thereof
CN102802805A (zh) * 2009-06-25 2012-11-28 纳幕尔杜邦公司 涂料的喷涂装置及其使用
EP2536509A1 (en) * 2010-02-15 2012-12-26 E.I. Du Pont De Nemours And Company Two-component spray device and use thereof
EP2536509A4 (en) * 2010-02-15 2014-08-13 Coatings Foreign Ip Co Llc DEVICE FOR SPRAYING TWO COMPONENTS AND USE THEREOF
US9027858B2 (en) 2010-02-15 2015-05-12 Axalta Coating Systems Ip Co., Llc Two-component spray device and use thereof
US9186688B2 (en) 2010-02-15 2015-11-17 Axalta Coating Systems Ip Co., Llc Method for spraying two-component compositions
US20120288631A1 (en) * 2010-02-15 2012-11-15 E I Du Pont De Nemours And Company Method for spraying two-component compositions
WO2011100003A1 (en) 2010-02-15 2011-08-18 E.I. Du Pont De Nemours And Company Two-component spray device and use thereof
JP2013537470A (ja) * 2010-05-28 2013-10-03 サタ ゲーエムベーハー アンド カンパニー カーゲー スプレー器具用ノズルヘッド
US8973522B2 (en) 2011-03-14 2015-03-10 Axalta Coating Systems Ip Co., Llc Dual feeding spray device and use thereof
WO2022042710A1 (zh) * 2020-07-07 2022-03-03 宁波江辉电器科技有限公司 一种双流道结构以及喷枪

Also Published As

Publication number Publication date
JPS58263A (ja) 1983-01-05

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19831009

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Inventor name: BARANOWSKI, CHESTER H.