EP0541745A1 - Spray coating device. - Google Patents
Spray coating device.Info
- Publication number
- EP0541745A1 EP0541745A1 EP92910645A EP92910645A EP0541745A1 EP 0541745 A1 EP0541745 A1 EP 0541745A1 EP 92910645 A EP92910645 A EP 92910645A EP 92910645 A EP92910645 A EP 92910645A EP 0541745 A1 EP0541745 A1 EP 0541745A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coating
- switching device
- coating material
- valve
- path section
- 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
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
- 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
Definitions
- the invention relates to a spray coating device according to the preamble of claim 1.
- Such a spray coating device is known from DE-PS 32 01 930 C2.
- coating material colored or transparent, paint, varnish
- Coating material changer and from this via a flow path to an atomizing device which sprays the coating material onto an object to be coated. If the coating material changer is no longer fed, the coating material is Flow path still filled with coating material. So that this coating material is not lost, it is pressed out of the flow path by an additional fluid (air, but preferably liquid, in particular solvent) starting from the coating material changer to close to the atomizing element of the atomizing device and sprayed onto the object to be coated by the atomizing device. The remaining residues in the flow path are then expelled from the flow path by the same or a different fluid by means of a continuous or intermittent fluid surge.
- the object of the invention is to reduce the time required for cleaning the flow path when changing from one coating material to another coating material and to reduce the amount of solvent required for this. At the same time, the task of being able to clean the atomizer device alone in less breaks than previously required, with less solvent than was previously required, should be achieved in coating breaks, when work is subsequently continued with different or the same coating material.
- the drawing shows a spray coating device according to the invention for the automatic application of liquid coating material to in particular motor vehicle bodies by means of an atomizing device 2 for several, for example three, coating materials, in particular paints in a pressure vessel 4, 6 and 8.
- the atomizing device 2 contains known means for electrostatic Charging the coating material.
- a coating material changer 10 hereinafter called a color changer, contains, for example, six valves, preferably 2/2-way valves 12/1, 12/2, 12/3, 12/4, 12/5 and 12 / 6, so that, depending on the open directional valve, the coating material in question reaches the atomizer device 2 via a flow path 14.
- a pressure regulator 16 which is effective for all coating materials and is referred to below as the color pressure regulator 16.
- the color pressure regulator 16 For simplification, it is assumed that there is a first color in the pressure vessel 4, a second color in the pressure vessel 6, a third color in the pressure vessel 8 and a solvent in another pressure vessel 18.
- a compressed air source 20 is via a check valve 22/1 and a 2/2
- the solvent of the pressure vessel 18 can be connected to the flow path 14 via a solvent pressure regulator 24/1, a check valve 22/2 and a 2/2-way valve 12/5 of the color changer 10. Furthermore, the solvent pressure vessel 18 via a pressure regulator 24/2, a check valve 22/3 and a 2/2-way valve 12/6 of the color changer 10 can be connected in terms of flow to the flow path 14. In addition, the solvent pressure vessel 18 can be connected in terms of flow via a pressure regulator 24/3 and a subsequent check valve 22/4 to a 2/2-way valve 12/7 of a secondary flushing device 30.
- the secondary flushing device 30 also contains a 2/2-way valve 12/8, which is connected in terms of flow to a compressed air source 20 via a check valve 22/5.
- the outputs 32 and 34 of the two 2/2-way valves 12/7 and 12/8 are connected to one another in terms of flow and connected to a fluid connection 36 of a first switchover device 38.
- the first switching device 38 is preferably a 3/2-way valve.
- the first switching device 38 divides the flow path 14 into a first path section 40 leading from the color changer 10 to the first switching device 38 and a second path section 42 leading from the first switching device 38, from its flow connection 36, to the atomizing element 44 of the atomizing device 2.
- the atomizing element 44 is preferred a rotating bell.
- a measuring cell 46 is located in the first path section 40.
- the 3/2-way valve of the first switching device 38 connects the first path section 40 in terms of flow with the second path section 42 in the switching position shown.
- paint can be drawn from one of the pressure vessels 4 , 6 or 8 via the relevant valve 12/1 or 12/2 or 12/3 of the color changer 10 to the first path section 40 and from there via the first switching device 38 and the subsequent second path section 42 of the flow path 14 to the atomizing element 44 of the atomizing device 2 reach. If after this ink supply all valves 12/1, 12/2 and 12/3 of the different colors are closed, remains in the Flow path 14 (40, 42) a color liquid column.
- the atomizing device 2 contains a second switching device 50 in the form of two valves 52 and 54.
- the one valve 52 is located in the second path section 42 immediately upstream of the atomizing element 44, and the mentioned column end of the extended column of paint lies on the short intermediate piece 56 between this valve 52 and the atomizing element 44.
- the other valve 54 of the second switching device 50 connects the second path section 42 directly upstream of the one valve 52 to a second return line 58 which leads to a collecting container 60.
- the one valve 52 is open and the other valve 54 of the second switching device 50 is closed.
- the two valves 12/7 and 12/8 of the secondary flushing device 30 are closed.
- the coating material and the solvent are conveyed by compressed air sources 20 connected to them.
- the flow path 14 must be cleaned of coating material residues.
- the solvent can escape through the one valve 52 of the second switching device 50 on the atomizing member 44, or can preferably be conveyed into the collecting container 60 when the valve 52 is closed and the further valve 54 of the second return line 58 is open.
- the 3/2-way valve of the first switching device 38 is switched to a different position, according to the invention, to a so-called “rinsing” position. In this "rinsing" position, the two path sections 40 and 42 are no longer fluidly connected to one another via the flow connection 36 of the first switching device 38, but are separated from one another in the first switching device 38.
- the first path section 40 is connected via the first switching device 38 to a first return line 62, which likewise leads into the collecting container 60.
- the solvent (or another rinsing agent) which is conveyed from the color changer 10 through the first path section 40 to the first switching device 38 does not get into the second path section 42, but directly from the first switching device 38 into the collecting container 60 , while the one valve 52 of the atomizing device 2 is opened and the other valve 54 is closed, the valves 12/7 and 12/8 of the secondary flushing device 30 are alternately opened and closed and as a result a solvent (or another flushing agent) is alternately released from the pressure container 18 via the pressure regulator 24/3 with a relatively high frequency sequence and the 2/2-way valve 12/7 and the next time compressed air from the compressed air source 20 via the 2/2-way valve 12/8 of the secondary flushing device 30 at the fluid connection 36 of the first switching device 38 into the upstream start of the second way section 42 and through conveyed through this
- One valve 52 is thus always closed and the other valve 54 of the second switching device 50 is always open.
- the one valve 52 can be briefly opened and at the same time the other valve 54 can be closed, so that then a shock of solvent and / or air from the secondary flushing device 30 the second path section 42 is dispensed via the atomizing device 44.
- the flow path 14 is thus divided during the cleaning process into two path sections 40 and 42, which are preferably each of approximately the same length, at least each path section should still have a substantial length. If the flow path 14 is halved on two path sections, the time required for rinsing or cleaning the two path sections is also halved if this cleaning or rinsing takes place in parallel, that is to say simultaneously, according to the invention. At the same time, the consumption of cleaning agents or solvents is reduced, since the cleaning effect is greater on short distances than on long distances and less soiled cleaning material or solvent is more receptive to the paint to be cleaned.
- Solvent pressure regulator 24/1 switch to the pressure required to flush with solvent (this also adjusts the amount of solvent);
- the color pressure regulator 16 at the same time set the color pressure regulator 16 to the maximum value so that the solvent can flow freely through it; simultaneously switching the 3/2-way valve of the first switching device 38, so that no solvent can flow from the color changer 10 via the first switching device 38 to the atomizer device 2, but the flow path for solvent and air from the color changer via the first switching device 38 and the first return line 62 is open in the receptacle 60;
- the atomizer valve 52 of the second switching device 50 closes in the downstream end section of the second path section 42;
- the color pressure regulator 16 remains at the maximum pressure setting
- a second coating material changer 210 for further different types of coating material and to connect it via a further first path section 240 and a further first switching device 238 to the same flow connection 36 at the beginning of the second path section 42, so that then either a color changer 10 and one of the first path section 40 or the other color changer 210 and its first path section 240 are connected to the second path section 42 and thus can use the latter alternately together.
- the further first switchover device 238 can in turn be formed by a 3/2-way valve and can be connected to the collecting container 60 in terms of flow by a third return line 262. In this way, interruptions in operation are avoided even when a large number of different coating materials are used alternately and in between individual material strands or pressure containers containing coating material have to be exchanged or cleaned.
- An advantage of the invention is that by dividing the flow path into the sections 40 and 42 or 240 and 42 it is possible to clean the atomizer device 2 in a short time with little solvent through the secondary flushing device 30, without cleaning the first path section 40. This is expedient if, when using the same coating material, cleaning only the atomizer device 2 is necessary, for example during breaks in operation. If so-called water lacquer is used as the coating material, it is also possible within the scope of the invention to provide a further flushing device 330 corresponding to the construction of the secondary flushing device 30, with which it is possible, if necessary, only the atomizing member 44 of the atomizing device 2 with solvent and / or air to clean.
Landscapes
- Spray Control Apparatus (AREA)
- Nozzles (AREA)
Abstract
Un dispositif de revêtement par pulvérisation permet d'appliquer automatiquement un enduit liquide, notamment sur des carrosseries de véhicules à moteur, au moyen d'un pulvérisateur (2) pour une pluralité d'enduits. Le dispositif contient une voie d'écoulement (14) des enduits qui s'étend entre un échangeur d'enduits (10) et le pulvérisateur (2). Lors d'un changement d'enduit, la voie d'écoulement (14) peut être rincée par un fluide. La voie d'écoulement (14) comprend un premier commutateur (38) qui permet de la subdiviser en au moins deux sections (40, 42) de rinçage qui peuvent être rincées séparément mais en même temps. La première section (40) s'étend de l'échangeur d'enduits (10) jusqu'au premier commutateur (38) et la deuxième section (42) s'étend du premier commutateur (38) jusqu'à l'organe pulvérisateur (44).A spray coating device makes it possible to automatically apply a liquid coating, in particular to motor vehicle bodies, by means of a sprayer (2) for a plurality of coatings. The device contains a plaster flow path (14) which extends between a plaster exchanger (10) and the sprayer (2). When changing plaster, the flow path (14) can be flushed with fluid. The flow path (14) includes a first switch (38) which allows it to be subdivided into at least two rinse sections (40, 42) which can be rinsed separately but at the same time. The first section (40) extends from the plaster exchanger (10) to the first switch (38) and the second section (42) extends from the first switch (38) to the spray member. (44).
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4117613 | 1991-05-29 | ||
DE4117613A DE4117613A1 (en) | 1991-05-29 | 1991-05-29 | SPRAY COATING DEVICE |
PCT/EP1992/001150 WO1992021447A1 (en) | 1991-05-29 | 1992-05-22 | Spray coating device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0541745A1 true EP0541745A1 (en) | 1993-05-19 |
EP0541745B1 EP0541745B1 (en) | 1995-10-11 |
Family
ID=6432729
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92910645A Revoked EP0541745B1 (en) | 1991-05-29 | 1992-05-22 | Spray coating device |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0541745B1 (en) |
AU (1) | AU1763992A (en) |
DE (2) | DE4117613A1 (en) |
MX (1) | MX9202533A (en) |
WO (1) | WO1992021447A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4315223A1 (en) * | 1993-05-07 | 1994-11-10 | Abb Patent Gmbh | Method and device for potential isolation |
DE4342128A1 (en) * | 1993-12-10 | 1995-06-14 | Abb Patent Gmbh | Paint sprayer |
DE4423643A1 (en) * | 1994-07-06 | 1996-01-11 | Ind Lackieranlagen Schmidt Gmb | Spray coating device for different paint colours |
WO1997024189A1 (en) * | 1995-12-29 | 1997-07-10 | Ingenieurbüro Inovac | Method and device for coating objects requiring frequently changes of coating material |
DE19610589A1 (en) * | 1996-03-18 | 1997-09-25 | Duerr Gmbh & Co | Process and system for supplying paint to a coating system |
SE508510C2 (en) * | 1997-02-24 | 1998-10-12 | Abb Flexible Automation As | Installation and procedure for automatic spray painting |
DE19819339A1 (en) * | 1998-04-30 | 1999-12-09 | Lactec Gmbh | Method for leak-testing valve in color changer, for series processing of different types of varnishes |
DE10129667A1 (en) * | 2001-06-20 | 2003-01-02 | Abb Patent Gmbh | Paint pistol air cap cleaning arrangement has cover element with opening matching cap size, holder above opening holding paint pistol in cleaning position with cap in cleaning chamber |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US367425A (en) * | 1887-08-02 | Covering for meats | ||
US3450092A (en) * | 1965-07-08 | 1969-06-17 | Vilbiss Co The De | Color change apparatus |
US3717929A (en) * | 1970-06-03 | 1973-02-27 | Du Pont | Method of making alkali metal-filled electrical conductors and terminations therefor |
US4159806A (en) * | 1977-09-12 | 1979-07-03 | Ransburg Corporation | Operation sequence control system |
JPS6051867B2 (en) * | 1980-08-04 | 1985-11-15 | 日本ランズバ−グ株式会社 | How to change paint color |
US4375865A (en) * | 1980-08-12 | 1983-03-08 | Binks Manufacturing Company | Color change system for spray coating apparatus |
US4487367A (en) * | 1982-10-14 | 1984-12-11 | General Motors Corporation | Paint color change and flow control system |
DE3312268A1 (en) * | 1983-04-05 | 1984-10-11 | Hermann Behr & Sohn Gmbh & Co, 7121 Ingersheim | Paint recirculating system for a coating system |
US4728034A (en) * | 1986-02-06 | 1988-03-01 | Trinity Industrial Corporation | Cleaning device upon color-change in an electrostatic mutli-color coating apparatus |
FR2616086B2 (en) * | 1987-05-19 | 1990-01-26 | Sames Sa | PUMP COATING SPRAYING SYSTEM |
DE3725172A1 (en) * | 1987-05-27 | 1989-02-09 | Behr Industrieanlagen | METHOD AND SYSTEM FOR ELECTROSTATIC COATING WITH CONDUCTIVE MATERIAL |
EP0303541B1 (en) * | 1987-08-14 | 1991-10-09 | Sames S.A. | Spraying installation for a coating product, e.g. for a water soluble paint |
US4792092A (en) * | 1987-11-18 | 1988-12-20 | The Devilbiss Company | Paint color change system |
DE3817997A1 (en) * | 1988-05-27 | 1989-12-07 | Babcock Werke Ag | Apparatus for cleaning a line |
US4932589A (en) * | 1988-09-30 | 1990-06-12 | Binks Manufacturing Company | Method of and apparatus for electrical isolation of electrostatic sprayers |
DE3927880C2 (en) * | 1989-08-23 | 1998-07-30 | Behr Industrieanlagen | Process and plant for coating objects with frequently changing color material |
DE9106610U1 (en) * | 1991-05-29 | 1991-10-02 | Ransburg Gmbh, 6056 Heusenstamm | Spray coating device |
-
1991
- 1991-05-29 DE DE4117613A patent/DE4117613A1/en not_active Ceased
-
1992
- 1992-05-22 DE DE59203985T patent/DE59203985D1/en not_active Expired - Fee Related
- 1992-05-22 EP EP92910645A patent/EP0541745B1/en not_active Revoked
- 1992-05-22 AU AU17639/92A patent/AU1763992A/en not_active Abandoned
- 1992-05-22 WO PCT/EP1992/001150 patent/WO1992021447A1/en not_active Application Discontinuation
- 1992-05-28 MX MX9202533A patent/MX9202533A/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO9221447A1 * |
Also Published As
Publication number | Publication date |
---|---|
AU1763992A (en) | 1993-01-08 |
DE59203985D1 (en) | 1995-11-16 |
EP0541745B1 (en) | 1995-10-11 |
DE4117613A1 (en) | 1992-12-03 |
MX9202533A (en) | 1993-12-01 |
WO1992021447A1 (en) | 1992-12-10 |
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