EP0300902A1 - Handgesteuerte Sprühanlage und Druckluftsprühpistole für ein Beschichtungsprodukt - Google Patents

Handgesteuerte Sprühanlage und Druckluftsprühpistole für ein Beschichtungsprodukt Download PDF

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Publication number
EP0300902A1
EP0300902A1 EP88401881A EP88401881A EP0300902A1 EP 0300902 A1 EP0300902 A1 EP 0300902A1 EP 88401881 A EP88401881 A EP 88401881A EP 88401881 A EP88401881 A EP 88401881A EP 0300902 A1 EP0300902 A1 EP 0300902A1
Authority
EP
European Patent Office
Prior art keywords
trigger
components
installation according
coating product
air flow
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.)
Granted
Application number
EP88401881A
Other languages
English (en)
French (fr)
Other versions
EP0300902B1 (de
Inventor
Pascal Bordaz
Laurent Giraud
Alain Monnier
Eric Prus
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.)
Sames SA
Original Assignee
Sames 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 Sames SA filed Critical Sames SA
Publication of EP0300902A1 publication Critical patent/EP0300902A1/de
Application granted granted Critical
Publication of EP0300902B1 publication Critical patent/EP0300902B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/14—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet
    • B05B12/1418—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet for supplying several liquids or other fluent materials in selected proportions to a single spray outlet
    • 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
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive 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
    • B05B7/12—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
    • B05B7/1281—Serial arrangement, i.e. a single gas stream acting on the controlling means first and flowing downstream thereof to the nozzle
    • 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 invention relates to an installation for spraying coating product with manual control, that is to say using a pneumatic sprayer with manual control, provided with an actuating trigger controlling both the flow of coating product (paint) and the opening of the valve controlling the supply of spray air for this product.
  • the invention relates more particularly to improvements allowing better control of the air flows and of coating product. It finds a preferred application in installations using two-component paints or varnishes (typically a base and a hardener) in order to better control, in all circumstances, the volumetric ratio between these two components.
  • two-component paints or varnishes typically a base and a hardener
  • a conventional manual spray paint installation comprises at least one pneumatic sprayer provided with an actuating trigger and connected, on the one hand, to a paint supply duct and, on the other hand, to a duct compressed air supply.
  • the paint is atomized and propelled by air towards the object to be painted.
  • the user controls the spray of sprayed paint by pressing the trigger more or less.
  • the paint passes through a valve controlled by the trigger.
  • the actuation of this valve is proportional, that is to say that its arrangement is such that the flow rate of the valve is a function of the degree of depression of the trigger.
  • the air inlet control valve also controlled by the trigger, is of the "all or nothing" type, that is to say that the air flow remains practically constant whatever the flow paint.
  • the invention therefore essentially relates to a coating product spraying installation comprising at least one pneumatic sprayer with manual control, provided with an actuating trigger, connected to means for supplying product to be sprayed and to a source of compressed air, characterized in that said headlight comprises a means for progressive adjustment of the air flow rate, sensitive to the position of said actuating trigger.
  • the invention relates to another improvement making it possible to control the paint flow more precisely, by means of a gear pump inserted in the paint supply circuit.
  • the invention therefore also relates to an installation according to the above definition, characterized in that said means for supplying coating product comprise a gear pump driven by a variable speed motor, controlled by sensitive control means. , in particular, to an electrical signal representative of the position of said trigger.
  • the installation in question will include a sensor for the spraying air flow rate and this sensor will be part of the means for generating the electrical signal representative of the position of the trigger.
  • the invention therefore also relates to an installation in accordance with the preceding description and comprising a mixer of said components, inserted upstream of the projector and comprising two inputs, respectively for the two components and an output connected to said projector, characterized in that that gear pumps are respectively inserted in respective supply circuits of said components, upstream of said mixer and in that these pumps are respectively driven by variable speed motors, controlled by control means able to maintain the flow rates of said components in a predetermined ratio.
  • a manually operated paint sprayer 10 conventionally comprising, a spray nozzle 11, a connection nozzle 12 connected to a paint supply conduit 12 a and a nozzle connection 14 connected to a compressed air supply duct 14 a .
  • An actuating trigger 16 is articulated at 17 to the body of the projector. It is coupled to the needle of a proportional action valve (not shown) controlling the paint flow and, according to a an important characteristic of the invention, it is also coupled, by an articulated rod 19, to a means of progressive adjustment of the air flow.
  • a flow control valve 21 comprising a shutter element 22 movable relative to a seat 23 defined in a chamber 24 between an inlet 25 connected to the nozzle 14 and a outlet 26 connected to the spraying means.
  • the rod 19 is attached to the closure element 22 while a spring 28, located in the chamber 24, biases said closure element towards the seat 23, that is to say towards the closed position of valve.
  • the progressive adjustment of the air flow, sensitive to the position of the trigger, is obtained by rolling the air over a certain variable axial distance, in an annular passage 30 defined between the closure element and the seat.
  • the closure element comprises a substantially cylindrical core 22 a and the seat 23 comprises or is extended by a portion of conduit 23 a substantially cylindrical and of diameter greater than that of the core 22 a .
  • the annular passage 30, of variable length, is defined between said core 22 a and said portion of conduit 23 a .
  • This core, under the action of the rod 19 and the spring 28 is axially movable inside said portion of conduit.
  • the length d thereof corresponds substantially to the stroke of the trigger.
  • the pressure drop caused by the rolling of the air in the passage 30 and, consequently, the flow of atomizing air depend on the position of the trigger.
  • the air flow and the paint flow vary with the position of said trigger.
  • there will be a low air consumption avoiding drying the paint by an excess of air.
  • FIG. 2 illustrates, in its simplest form, a coating product spraying installation using the projector of FIG. 1.
  • the air supply means connected to the nozzle 14, comprise an air flow sensor 34 for measuring the spraying air flow rate determined by the valve 21.
  • this sensor of any known type, is inserted between a source of compressed air, represented here by the conduit 36 and the projector 10. The sensor could of course be integrated into said projector.
  • This sensor delivers at its output 34 to an electrical signal representative of the air flow and thus consequently the depression of the trigger.
  • the coating material supply means comprise a gear pump 38 driven by a variable speed motor 39.
  • This pump is here inserted between a paint circulation duct 40 and the nozzle 12.
  • the motor 39 is supplied by control means 42 (for example a current amplifier) sensitive, in particular to an electrical signal representative of the position of the trigger 16. In the example described, this signal is precisely delivered by the electrical output 34 a of the sensor air flow 34.
  • opto-electric means are used to develop the signal representative of the position of the trigger 16.
  • the latter is mechanically linked to a reflecting element 44 pivotally mounted and this reflecting element is inserted into a circuit of optical fibers 45, 46 established between a light source 47 and an optoelectric sensor 48.
  • the latter is part of the means for developing the electrical signal representative of the position of the trigger.
  • the electrical signal output of the sensor 48 can be connected to the control means 42 in the same way as the output 34 a of the air flow sensor 34.
  • FIG. 2 is preferable because it has the additional advantage of making the pump also sensitive to possible fluctuations in the air pressure.
  • the paint flow rate can thus be automatically modified to maintain a substantially constant air-paint dosage. This avoids any excess paint and therefore, any risk of leakage.
  • FIG. 4 illustrates a particularly advantageous application of the invention, for the implementation of a two-component coating product, in particular a paint formed by the mixture of a colored base and a hardener.
  • a mixer 50 inserted upstream from the projector 10.
  • This mixer has two inputs 50 a , 50 b , for each of the two components at an output 51 connected to the connection end piece 12.
  • the mixer is also connected, by a non-return valve 52, to a cleaning block 53, known per se, comprising an inlet for solvent 53 a and an inlet for compressed air 53 b .
  • a paint supply circuit (or base) 55 and a hardener supply circuit 56 there is a paint supply circuit (or base) 55 and a hardener supply circuit 56.
  • the output of circuit 55 is connected to input 50 a of the mixer, and the output of circuit 56 is connected to input 50 b of the mixer.
  • the circuit 55 is connected to a color changing block 60, known per se, itself connected to several paint supply pipes or bases of different colors 61-63, to an air supply pipe 65 and to a solvent supply pipe 66.
  • the circuit 55 thus successively comprises, between the color changing block 60 and the mixer, a gear pump 67 a driven by a variable speed electric motor 68 a , a flow sensor 69 a and a purge valve 70 a .
  • a safety valve 71a is connected in parallel to the pump.
  • the flow sensor 69 a is here advantageously of the "gear" type, that is to say that its mechanical part is very structurally similar to a gear pump.
  • One of the pinions of this gear sensor is coupled to an inductive transducer 72 a whose electrical output delivers a signal representative of the flow of liquid in the circuit 55.
  • the hardener circulation circuit 56 is quite comparable to the circuit 55 It is connected to a hardener circulation duct 78 and comprises, interconnected in the same way, a gear pump 67 b , driven by a motor 68 b , a flow sensor 69 b with its transducer 72 b , a valve safety 71 b and a purge valve 70 b .
  • the compressed air supply means are similar to those of FIG. 2 and therefore comprise an air flow sensor 73 connected between the conduit 65 and the connection end piece 14.
  • a computer 75 receives the output signals from the flow sensors 69 a and 69 b and from the air flow sensor 73 (delivering a signal representative of the position of the trigger) and delivers signals control with two current amplifiers 76 a , 76 b respectively supplying the motors 68 a , 68 b .
  • the computer 75 is part of the engine control means 68 a , 68 b . It is programmed to maintain the flow rates of the two components flowing in the circuits 55 and 56, in a predetermined ratio.
  • the system When the trigger is pulled very lightly, the system is set so that a low flow of spray air occurs before paint is admitted to the projector.
  • the paint inlet valve control needle is then still closed.
  • the pump is only allowed to operate from a certain level of air flow for which it is certain that the valve needle is actually open. All of these operating details can easily be taken into account by the computer 75.
  • a minimum flow threshold is fixed below which the pump is stopped. The thresholds can be different on opening and closing. We can also anticipate the pump stopping before closing the needle, if the air flow sensor has a relatively slow response.

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EP88401881A 1987-07-20 1988-07-20 Handgesteuerte Sprühanlage und Druckluftsprühpistole für ein Beschichtungsprodukt Expired - Lifetime EP0300902B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8710213 1987-07-20
FR8710213A FR2618354B1 (fr) 1987-07-20 1987-07-20 Installation de pulverisation de produit de revetement a commande manuelle et projecteur pneumatique d'un tel produit de revetement

Publications (2)

Publication Number Publication Date
EP0300902A1 true EP0300902A1 (de) 1989-01-25
EP0300902B1 EP0300902B1 (de) 1991-04-24

Family

ID=9353310

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88401881A Expired - Lifetime EP0300902B1 (de) 1987-07-20 1988-07-20 Handgesteuerte Sprühanlage und Druckluftsprühpistole für ein Beschichtungsprodukt

Country Status (4)

Country Link
US (1) US4998672A (de)
EP (1) EP0300902B1 (de)
DE (2) DE300902T1 (de)
FR (1) FR2618354B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0420181A3 (en) * 1989-09-27 1992-04-22 Union Carbide Chemicals And Plastics Company, Inc. Method and apparatus for metering and mixing noncompressible and compressible fluids
EP0605137A1 (de) * 1992-12-30 1994-07-06 Nordson Corporation Verfahren und Vorrichtung zur Herstellung und Abgabe eines Mehrkomponenten-Beschichtungsmaterials
EP0605138A1 (de) * 1992-12-30 1994-07-06 Nordson Corporation Abgabesystem für Beschichtungsmaterial, welches einen Katalysator enthält
RU2277443C2 (ru) * 2000-11-29 2006-06-10 Акцо Нобель Н.В. Способ различного нанесения составов покрытий с использованием многокомпонентного аппарата, содержащего три или большее число компонентов

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CA2107523C (en) * 1993-10-01 2004-05-04 Gary D. Langeman Plural component delivery system
US5478014A (en) * 1994-04-20 1995-12-26 Hynds; James E. Method and system for hot air spray coating and atomizing device for use therein
US5836031A (en) * 1996-06-07 1998-11-17 Minnesota Mining And Manufacturing Company Fiber optic cable cleaner
WO1998041316A1 (en) 1997-03-19 1998-09-24 Akzo Nobel N.V. Apparatus for applying multi-component coating compositions
US6010032A (en) * 1997-06-19 2000-01-04 Emes N.V. Continuous dispensing system for liquids
EP0885659A1 (de) * 1997-06-19 1998-12-23 Emes N.V. System zur kontinuierlichen Abgabe von Flüsssigkeiten
FR2794384B1 (fr) * 1999-06-04 2001-10-05 Sames Sa Procede d'alimentation de produits de revetement pour l'application manuelle de tels produits sur des objets deplaces sur un convoyeur, installation et equipement correspondants
US6322000B1 (en) * 1999-09-10 2001-11-27 United Technologies Corporation Convergent spray nozzle shut-down system
US6821025B2 (en) 2002-07-18 2004-11-23 Westover Scientific, Inc. Fiber-optic endface cleaning assembly and method
US7232262B2 (en) 2002-07-18 2007-06-19 Westover Scientific, Inc. Fiber-optic endface cleaning apparatus and method
US7762476B2 (en) * 2002-08-19 2010-07-27 Illinois Tool Works Inc. Spray gun with improved atomization
US6808122B2 (en) * 2002-08-19 2004-10-26 Illinois Tool Works, Inc. Spray gun with improved pre-atomization fluid mixing and breakup
US7883026B2 (en) 2004-06-30 2011-02-08 Illinois Tool Works Inc. Fluid atomizing system and method
US7926733B2 (en) * 2004-06-30 2011-04-19 Illinois Tool Works Inc. Fluid atomizing system and method
US20070000947A1 (en) * 2005-07-01 2007-01-04 Lewis Russell H Apparatus and methods for dispensing fluidic or viscous materials
US7599840B2 (en) * 2005-07-15 2009-10-06 Microsoft Corporation Selectively using multiple entropy models in adaptive coding and decoding
US20070069040A1 (en) * 2005-08-15 2007-03-29 Lewis Russell H Apparatus and methods for dispensing fluidic or viscous materials
US8251603B2 (en) * 2007-03-12 2012-08-28 John Kott Pressure fed squeege applicator
TWI433855B (zh) * 2008-06-04 2014-04-11 Univation Tech Llc 漿液觸媒流分流器及其使用方法
USD591397S1 (en) * 2008-07-15 2009-04-28 Rigo S.R.L. Handle for sealing piston
US9670919B2 (en) 2010-11-18 2017-06-06 Wagner Spray Tech Corporation Plural component pumping system
PH12014501064A1 (en) 2011-11-11 2014-06-30 Pioneer Hi Bred Int Large scale method for dispensing grains of pollen
CN103929948A (zh) * 2011-11-11 2014-07-16 先锋国际良种公司 用于分配花粉粒的方法
RU2570874C1 (ru) * 2014-10-06 2015-12-10 Юрий Владимирович Кудрявцев Аппарат для распыления высокореактивных быстроотверждаемых эластомерных материалов
DE102015101361A1 (de) * 2015-01-30 2016-08-04 J. Wagner Gmbh Farbspritzgerät
US9993591B2 (en) * 2015-03-24 2018-06-12 Nupur Technologies, LLC Ear cleaning device
US10758933B2 (en) * 2016-03-01 2020-09-01 Carlisle Fluid Technologies, Inc. Fluid regulation system
US9726456B1 (en) * 2016-04-18 2017-08-08 Li-Tang Jhu Blow gun
US11557389B2 (en) 2019-06-20 2023-01-17 Nupur Technologies, LLC Methods and computer program product for application-based telemedicine for performing a cleaning operation on the ear canal of a patient

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US1720389A (en) * 1928-01-07 1929-07-09 Binks Mfg Co Air-control valve for spray guns
GB1105265A (en) * 1964-04-22 1968-03-06 Philips Nv Improvements in or relating to gas cocks
US3416730A (en) * 1963-06-05 1968-12-17 Charles C. Perry Apparatus for providing multiple liquid jets
US4294277A (en) * 1980-07-09 1981-10-13 Foam Controls, Inc. Flow control apparatus

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US1626096A (en) * 1927-04-26 Spray gun
BE439980A (de) * 1938-05-28
US2685294A (en) * 1949-04-11 1954-08-03 Gold Harold Wide range flow rate metering valve
US2959358A (en) * 1957-10-31 1960-11-08 William D Vork Portable pneumatic spray-painting unit
US3029062A (en) * 1959-09-21 1962-04-10 Auto Research Corp Lubrication
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US4019653A (en) * 1975-08-22 1977-04-26 Graco Inc. Automatic proportioning paint spray system
US4568248A (en) * 1984-04-26 1986-02-04 Harders Mark R Additive feedback monitoring system

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
US1720389A (en) * 1928-01-07 1929-07-09 Binks Mfg Co Air-control valve for spray guns
US3416730A (en) * 1963-06-05 1968-12-17 Charles C. Perry Apparatus for providing multiple liquid jets
GB1105265A (en) * 1964-04-22 1968-03-06 Philips Nv Improvements in or relating to gas cocks
US4294277A (en) * 1980-07-09 1981-10-13 Foam Controls, Inc. Flow control apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0420181A3 (en) * 1989-09-27 1992-04-22 Union Carbide Chemicals And Plastics Company, Inc. Method and apparatus for metering and mixing noncompressible and compressible fluids
EP0605137A1 (de) * 1992-12-30 1994-07-06 Nordson Corporation Verfahren und Vorrichtung zur Herstellung und Abgabe eines Mehrkomponenten-Beschichtungsmaterials
EP0605138A1 (de) * 1992-12-30 1994-07-06 Nordson Corporation Abgabesystem für Beschichtungsmaterial, welches einen Katalysator enthält
US5490726A (en) * 1992-12-30 1996-02-13 Nordson Corporation Apparatus for proportioning two components to form a mixture
RU2277443C2 (ru) * 2000-11-29 2006-06-10 Акцо Нобель Н.В. Способ различного нанесения составов покрытий с использованием многокомпонентного аппарата, содержащего три или большее число компонентов

Also Published As

Publication number Publication date
US4998672A (en) 1991-03-12
FR2618354B1 (fr) 1989-12-01
FR2618354A1 (fr) 1989-01-27
DE300902T1 (de) 1989-06-22
EP0300902B1 (de) 1991-04-24
DE3862541D1 (de) 1991-05-29

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