EP0104395B1 - Farbmischverfahren und Farbmischeinrichtung zur Verfahrensdurchführung - Google Patents

Farbmischverfahren und Farbmischeinrichtung zur Verfahrensdurchführung Download PDF

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Publication number
EP0104395B1
EP0104395B1 EP83108024A EP83108024A EP0104395B1 EP 0104395 B1 EP0104395 B1 EP 0104395B1 EP 83108024 A EP83108024 A EP 83108024A EP 83108024 A EP83108024 A EP 83108024A EP 0104395 B1 EP0104395 B1 EP 0104395B1
Authority
EP
European Patent Office
Prior art keywords
chamber
mixture
location
liquid
valve
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.)
Expired
Application number
EP83108024A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0104395A3 (en
EP0104395A2 (de
Inventor
Hans Behr
Kurt Dipl.-Ing. Vetter
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.)
Mahle Behr Industry GmbH and Co KG
Original Assignee
Behr Industrieanlagen GmbH and Co KG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6171953&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0104395(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Behr Industrieanlagen GmbH and Co KG filed Critical Behr Industrieanlagen GmbH and Co KG
Publication of EP0104395A2 publication Critical patent/EP0104395A2/de
Publication of EP0104395A3 publication Critical patent/EP0104395A3/de
Application granted granted Critical
Publication of EP0104395B1 publication Critical patent/EP0104395B1/de
Expired 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
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
    • B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/16—Arrangements for supplying liquids or other fluent material

Definitions

  • the invention relates to a method for mixing several components of a paint liquid and for atomizing the same and optionally electrostatically charging the particles of the atomized liquid, in which the components are led separately to a place of assembly, which has a fixed spatial relationship to the place of atomization, and in which the assembled Components are mixed homogeneously before they reach the atomization site as a mixture; and a device for performing such a method, each with a channel per component of the liquid, which extends between a source of one of the components and a check valve at the assembly location, at least one check valve opening into a chamber assigned to it; with a spraying device at the atomization point, which is connected in a fluid-conducting manner to the chamber via a feed path; and with a control device for, optionally optional; Actuation of the check valves.
  • a mixture atomization by means of compressed air is provided which first atomizes a component of the color liquid in a first chamber, whereupon the paint mist created subsequently atomizes the second component of the paint liquid in a second chamber, so that finally a mist mixture leaves the nozzle of the known spray gun with the aforementioned device.
  • the invention is based on the known device, the task to achieve a particularly intimate mixing of the components of the color liquid, if the atomization should be done without using compressed air, in such a way that, for. B. during a color change, but also after a spray break, as little unusable paint liquid as possible must be removed from the cavities of the device, as is the case with the spray gun according to US-A-3 485 453, but not with a dynamic mixing device which is connected to a spray gun via a hose.
  • the paint liquid to be atomized is a so-called two-component paint, it can be pressed out of the tube when changing the color, but it leaves deposits of mixed paint that are lost. This problem, which also occurs with hardener-less paint liquids, increases quantitatively with the length of the tube. Here one has come to terms with the fact that considerable amounts of paint are lost due to deposits of paint in the hose.
  • the object on which the invention is based is achieved according to the invention in that, in a process of the type mentioned at the outset, the components of the color liquid are mixed heterogeneously without the addition of air at the place of assembly and the mixture between the place of assembly and the place of atomization is gradually converted into the mixture which is produced under the influence Centrifugal forces are atomized; and that in a device of the type mentioned in the introduction, all check valves open into the same batch-forming chamber, the feed section is formed mainly by means of a static mixer and the spraying device has a rotatable atomizer bell.
  • a preferred embodiment of the device according to the invention is characterized by a channel for a liquid cleaning agent, which extends between a cleaning agent source and an additional inlet check valve at the assembly point, which opens into the batch-forming chamber; and through a further outlet check valve connected via a channel to a detergent sink, which opens with the detergent pressure and is connected through a line to a prechamber of the check valve of one component, preferably the main component, of the paint liquid.
  • valves can be actuated pneumatically independently of one another, so that the device according to the invention can be operated appropriately.
  • the batch-forming chamber is annular and the valves for the components of the color liquid are distributed over the circumference of this chamber. This results not only in a concentrated arrangement of the valves, but also in a flow-technically advantageous design of the flow path to the static mixer from the valve furthest away.
  • valve associated with the main component of the color liquid in particular the base lacquer of a two-component lacquer, opens into the chamber opposite the mouth of the batch-forming chamber into the mixer, so that the main component passes through the chamber into the mixer without detour through the delivery channel.
  • the preferred embodiment is characterized by a second chamber which opens into the second outlet valve for the cleaning agent and forms part of the line from the antechamber of a shut-off valve to the outlet valve; the inlet valve for the cleaning agent and this a check valve for the main component of the color liquid are arranged at the ends of the batch forming chamber.
  • the conveying path can be placed over the antechamber of the check valve of a component, preferably the main component of the paint, to the second outlet valve for the cleaning agent past this check valve through the second chamber and, on the other hand, a continuous flushing of the first chamber and, at open shut-off valve for the main component, the subsequent static mixer.
  • the embodiment consists - in FIG. 1 from right to left - mainly of a spray device 10, a static mixer 12 and a structural unit 14 which is connected to the spray device in a fluid-conducting manner via the mixer.
  • the assembly 14 has a housing 16, on the rear end, which can be seen in Fig. 2, four hose connections 18 for the pulsed supply of compressed air and a hose connection 20 for the supply of base paint, a hose connection 22 for the supply of hardener , A hose connection 24 for the supply of thinner as a cleaning agent and a hose connection 26 for recycling are attached.
  • Each hose connection 18 is in air-conducting connection with a cylinder 28 of a valve device formed by the housing 16.
  • a spring-loaded piston 30 of the valve device slides in the cylinder 28, the rod of which forms a valve needle 32, the tip 34 of which cooperates with the conical seat 36 of a valve of the valve device which is introduced into the housing 16.
  • Each of the hose connections 20, 22, 24 and 26, to which the valve tips 34 20 , 34 22 , 34 24 and 34 26 are assigned, is in liquid-conducting connection with a channel section 38 formed in the housing 16, the part of which parallel to the valve needle 32 in FIG 1 can be seen, while the part of the channel section connecting this part with an annular space 40 located behind the valve seat 36 around the valve needle cannot be seen there.
  • the hose connection for a certain fluid and one of the two adjacent hose connections 18 for compressed air are assigned to each other in pairs.
  • a semicircular chamber 42 is formed in the housing 16, into which three of the four valve seats 36 open out, evenly distributed over the chamber circumference, namely those which are assigned to the hose connections 20, 22 and 24, respectively, while the fourth valve seat 36 assigned to the hose connection 26 in one end of an approximately eight-circle-shaped chamber 43 opens into the housing 16, the other end of which is connected via a branch duct 45 to the annular space 40 for the base lacquer.
  • the two chambers 42 and 43 are coplanar.
  • the chamber 42 is provided with a colinear housing bore 44, at the end of which is remote from the valve seat, the static mixer 12 is placed colinearly.
  • the mixer 12 works without moving parts, in that the fluids to be mixed, namely the base lacquer and the hardener, are pressed through a labyrinth or between baffles, where they mix intimately.
  • a nozzle 46 of the spraying device 10 is attached to the end of the static mixer 12 facing away from the structural unit 14 and has an atomizer bell 48 with a deflection part 50.
  • the mixture of base lacquer and hardener emerging from the nozzle 46 that is to say the ready-to-apply 2-component lacquer, reaches the bell edge via both broad sides of the deflection part 50 rotating with the bell 48 about the axis of the mixer 12 and is converted there into a paint mist.
  • the bell rim is provided with grooves, not shown, which intersect in pairs, the color Form currents and mix at the crossing points.
  • a color change is carried out in three steps: First, the valves 34, 36 for master varnish, hardener and thinner are kept closed, while the valve for recirculation is open, so that instead of the master varnish used thinner for the first rinsing, possibly interrupted by pulsed air, if necessary in portions reaches the hose connection 26 via the hose connection 20 through the branch duct 45 and the chamber 43, the base lacquer contained in these cavities and the hoses being pressed out and collected at the end of the return hose.
  • a second rinse is carried out during its continuation, in which the valve for the base paint is open, so that, if necessary, pulsed thinner reaches the spraying device 10 after a short distance through the chamber 42, as in the case of intermediate rinsing through the mixer 12 where it is caught together with the squeezed out liquid.
  • the valves 34, 36 for thinner and return are kept closed, while the valves for base coat and hardener are opened until the desired paint liquid as a mixture of base coat and hardener has reached the spray device 10 through the chamber 42 and the mixer 12, pending there.
  • valves 34, 36 need to be opened for the base coat and hardener, regardless of whether a color change has taken place beforehand or not.

Landscapes

  • Nozzles (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Electrostatic Spraying Apparatus (AREA)
EP83108024A 1982-08-28 1983-08-13 Farbmischverfahren und Farbmischeinrichtung zur Verfahrensdurchführung Expired EP0104395B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823232088 DE3232088A1 (de) 1982-08-28 1982-08-28 Farbmischverfahren und farbmischeinrichtung zur verfahrensdurchfuehrung
DE3232088 1982-08-28

Publications (3)

Publication Number Publication Date
EP0104395A2 EP0104395A2 (de) 1984-04-04
EP0104395A3 EP0104395A3 (en) 1985-05-22
EP0104395B1 true EP0104395B1 (de) 1987-07-29

Family

ID=6171953

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83108024A Expired EP0104395B1 (de) 1982-08-28 1983-08-13 Farbmischverfahren und Farbmischeinrichtung zur Verfahrensdurchführung

Country Status (3)

Country Link
EP (1) EP0104395B1 (es)
DE (2) DE3232088A1 (es)
ES (2) ES525177A0 (es)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0201683A1 (en) * 1985-05-13 1986-11-20 Jean Egli A variable colorant blender
DE19536748A1 (de) * 1995-10-02 1997-05-15 Wagner Int Hochdruckspritzpistole für Zweikomponenten-Materialien
JPH105635A (ja) * 1996-04-25 1998-01-13 Kao Corp 静電粉体塗装方法および静電粉体塗装装置
US6202945B1 (en) 1997-04-22 2001-03-20 Kao Corporation Method and apparatus for electrostatic powder coating
DE19826977B4 (de) * 1998-06-18 2008-07-17 Desoi Gmbh Spritzdüsenkopf
US6733842B1 (en) * 2003-05-01 2004-05-11 E. I. Du Pont De Nemours And Company Process for the high-speed rotary application of liquid coating agents
US6929823B2 (en) 2003-05-01 2005-08-16 E. I. Du Pont De Nemours And Company Process for the high-speed rotary application of liquid, pigmented coating agents
DE102010019771A1 (de) * 2010-05-07 2011-11-10 Dürr Systems GmbH Zerstäuber mit einem Gittermischer

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE561209A (es) * 1956-09-29
DE1177045B (de) * 1961-03-24 1964-08-27 Schilde Maschb Ag Rotierender Zweikomponentenspruehkopf fuer elektrostatische Lackiervorrichtungen
US3201048A (en) * 1963-04-19 1965-08-17 Gen Motors Corp Multiple fluid spray gun with remotely operable selective valve control
US3485453A (en) * 1968-02-05 1969-12-23 Vilbiss Co The De Dual component spray gun
BE755696A (fr) * 1969-09-03 1971-03-03 Carrier Engineering Co Ltd Appareil destine a commande le fonctionnement d'un pistolet de pulverisation
US3870233A (en) * 1973-09-12 1975-03-11 Nordson Corp Color change of electrostatic spray apparatus
US3924806A (en) * 1974-11-20 1975-12-09 Ford Motor Co Mixing manifold for air atomizing spray apparatus
DE2650405A1 (de) * 1976-11-03 1978-05-18 Reinhardt Gmbh & Co Technik Zweikomponenten-dosiereinrichtung
DE2747707C2 (de) * 1977-10-25 1982-10-21 Daimler-Benz Ag, 7000 Stuttgart Anlage zum Farbspritzen von Serienteilen wechselnder Farbe

Also Published As

Publication number Publication date
ES8404879A1 (es) 1984-06-01
EP0104395A3 (en) 1985-05-22
ES8407407A1 (es) 1984-10-01
ES525177A0 (es) 1984-10-01
DE3372719D1 (en) 1987-09-03
ES525867A0 (es) 1984-06-01
DE3232088A1 (de) 1984-03-01
EP0104395A2 (de) 1984-04-04

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