EP1577017A2 - Procédé et installation pour assurer la circulation sans cisaillement d'un produit de revêtement - Google Patents
Procédé et installation pour assurer la circulation sans cisaillement d'un produit de revêtement Download PDFInfo
- Publication number
- EP1577017A2 EP1577017A2 EP05356050A EP05356050A EP1577017A2 EP 1577017 A2 EP1577017 A2 EP 1577017A2 EP 05356050 A EP05356050 A EP 05356050A EP 05356050 A EP05356050 A EP 05356050A EP 1577017 A2 EP1577017 A2 EP 1577017A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- pipe
- coating product
- scraper
- coating
- product
- 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- Withdrawn
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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
- B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
- B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
- B05B9/035—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material to several spraying apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
Definitions
- the present invention relates to the technical field of the projection of a surface coating product in the general sense.
- the present invention relates more specifically to a controlled installation of projection of a coating product such as paint.
- the present invention finds a particularly advantageous application but not limiting for the automotive industry in the context of the coating of automobile bodies.
- a painting projection installation comprises at least one, and in general, a series of circulation circuits of paints of different colors, each consisting of a loop in which circulates a painting.
- Each circuit has a pumping station and a supply line for painting projection means arranged in relation of one, and in general, of several paint booths crossed by the objects to paint.
- Each pumping station has at least one reservoir of storage of a given color paint and a pump that pushes the paint into the pipe supplying application means of a manual or automatic nature commonly referred to as projectors, applicators or guns.
- Each means application of the multi-tone type for example is connected to an organ of selection called tint changer connected to different conduits via tappings and pipes, antennas or pipes.
- each circulation circuit is equipped with a regulator return or restrictor to reduce the return flow and increase the pressure, given the pressure losses resulting from the length of circulation and flow variations.
- the return regulator leads to a shear coating product, which alters its qualities.
- some coating products such as bases or water products consisting of suspension, sediment as soon as they are no longer in motion during a duration exceeding a few tens of minutes.
- the pump operates continuously, which contributes to increase the shear phenomenon described above.
- GB-2 222 789 discloses a installation comprising a coating product tank equipped with means of pumping to supply a feed circuit of the product projection means coating.
- a supply circuit which is made in the form of a loop comprises a pump ensuring the circulation of the coating product.
- the present invention therefore aims to remedy the disadvantages stated above by providing a method for dispensing a coating product under constant pressure in a pipe, without shearing the product of coating while avoiding the sedimentation of these coating products.
- the method according to the invention ensures the circulation of a coating product in a feed line of means of projection, and is characterized in that the injection direction of the product of pressure coating inside the pipe, which is injected upstream of a scraper arranged in the pipe so as to ensure the thrust, by said scraper, of the coating product inside the pipe according to movements of go and return.
- the method provides for detecting the position of the scraper at each end of the pipe to reverse the injection direction of the coating product inside the pipe when the scraper reaches one end.
- the pipe is fed by a common pipe selectively supplying one or the other of the two ends of the pipe upstream of the scraper and circulates from the end from which is injected the coating product towards the other end.
- the injection direction of the product of coating during the consumption phase of the coating product is a preferred application.
- the injection direction of the product is reversed. coating during the non-consumption phase of the coating product and retrieves the coating product pushed by the scraper.
- Another object of the invention is to propose an installation allowing the distribution of a coating product under constant pressure without shearing the coating product while avoiding their sedimentation.
- the installation comprises in relation to each end of the conduct, a scraper detection sensor connected to the control means to control the inversion means.
- both ends of the pipe are connected to the means inverted by a single supply station for the product of coating.
- the supply station of the product of coating includes a tank of pressure coating product communicating with the inverting means and powered by a pump from a storage reserve.
- the inversion means are equipped with a return pipe to storage tank, coating product from one or the other end of the circulation line, the return line being closed or open respectively for the consumption phase and for the no phase consumption or draining of the pipe.
- the installation comprises at each end of the pipe supply, a scraper stop block connected from one side to one end of the supply line and on the other side to the means of inversion of the direction of injection coating product.
- the installation comprises means injection of a cleaning product at a stop block so as to ensure the removal of the scraper for the cleaning product and the recovery of the coating product pushed by the scraper into the storage tank.
- Figure 1 is a diagram illustrating a first embodiment of an installation according to the invention.
- Figure 2 illustrates a second alternative embodiment of an installation according to the invention.
- the object of the invention relates to an installation 1 for ensuring the distribution of a coating product of any kind to different positions P projection of the coating product in relation to at least one, and in the illustrated example, two cabins C traversed by the objects receiving the coating product.
- This installation 1 comprises in the illustrated example, a circuit 2 ensuring the circulation of a coating product and comprising a supply line 3 also called "circulating" and connected to at least one supply station 4 of the coating product under pressure.
- Line 3 supplies the pressurized coating product of the various projection stations P of manual or automatic character, each comprising a stitching and an antenna for supplying projection means of the coating product such as a gun or a nozzle. applicator.
- the object of the invention can be applied to an installation comprising several circulation circuits 2 for coating products, for example paints of different colors.
- a scraper 7 is disposed inside the pipe 3 so as to be able to circulate between the two ends 3 1 and 3 2 of the pipe, called arbitrarily and for better understanding, starting end 3 1 and end end 3 2 .
- a scraper 7 is in the form of a solid body equipped with a seal cooperating with the pipe 3 so as to ensure the seal between its downstream portion and its upstream portion.
- each starting end 3 1 and arrival end 3 2 of the feed pipe is equipped respectively with a start stop block 8 1 and a stop block arrival 8 2 for a scraper.
- each stop block 8 1 and 8 2 has a receiving housing 9 1 and 9 2 respectively for the scraper 7 to stop its circulation in a given direction and different for each stop block.
- the start stop block 8 1 stops the scraper 7 when it comes from the arrival end 3 2 while the arrival stop block 8 2 stops the scraper 7 which flows from the end starting point 3 1 towards the arrival end 3 2 .
- Each stop block 8 1 and 8 2 is connected on one side to the supply line 3 and on the other side via a housing 9 1 , 9 2 , to the supply station 4 of the coating product.
- each stop block 8 1 , 8 2 has a removable character relative to the pipe 3 to allow cleaning of the wiper or its change.
- the installation 1 comprises means 11 for inverting the injection direction of the pressurized coating product inside the pipe 3.
- the reversing means 11 are interposed between the supply station 4 and the stop blocks 8 1 and 8 2 .
- These reversing means 11 are formed of manual or motorized valves and are controlled by manual or automatic control means.
- These reversing means 11 make it possible alternately to ensure the injection of the coating product at one and at the other ends of the supply pipe 3 so as to ensure the thrusting by the scraper 7 of the coating product. inside the pipe 3 according to movements back and forth.
- the pipe 3 is made in the form of a loop fed by a supply pipe 19 common to both ends of the pipe, and forming part of the supply station 4. It should be noted that each end of pipe 3 could be powered by a different supply station.
- the installation comprises at least in relation to each end 3 1 , 3 2 of the pipe 3 respectively a sensor 12 1 , 12 2 for detecting the position of the scraper 7.
- detection sensors 12 1 , 12 2 are connected the control means for controlling the inverting means 11 according to a method of operation which will be described more precisely in the following description.
- the pipe 3 is equipped at one time with position sensors 12 3 of the scraper 7.
- each stop block 8 1 , 8 2 is also equipped with a sensor 13 1 , 13 2 respectively for detecting the scraper 7.
- the supply station 4 comprises a storage tank 14 of a coating product.
- An electric, pneumatic or hydraulic pump 15 is connected to this storage tank 14 via a valve 16.
- This pump 15 is connected to a pressurized watertight tank 17 via a selection block 18 making it possible to feed the tank 17 or the tank. -pass by supplying the supply line 19 leading to the inversion means 11.
- the coating fluid is thus directed by the selection block 18 in the tank 17 under pressure of a gaseous fluid compatible with the coating product.
- the gaseous fluid may be isolated from coating material 20 by a internal system to the reservoir 17 such as a membrane.
- the coating product is stored in the tank 17 to a level controlled by a level sensor 21 while the pressure inside the tank 17 is kept constant by means of a pressure control device 22.
- a return line 24 provides communication between the inverting means 11 and the storage tank 14.
- a filter 25 is installed on the supply lines 19 and / or return 24 for filtering the coating fluid.
- an exchanger 26 is mounted on the supply lines 19 and / or return 24 to heat or cool the coating product.
- the pump 15 is controlled to pump from the storage tank 14 of the coating product to be transferred under pressure into the tank 17.
- the coating product is thus stored in the tank until at a level controlled by the level sensor 21.
- the coating product pushed by the pump 15 is introduced into the pipe 3 through the supply pipe 19 through the inverting means 11 which are controlled so as to supply the pipe 3 through, for example, the starting stop block 8 1 .
- the coating product thus pushes the scraper 7 and filled the pipe 3 to the stop block 8 2 arrival .
- This filling operation is controlled by the different detection sensors 12 3 arranged along the pipe 3.
- the coating product is put under the operating pressure using the pressure control means 22, the position of the selection block 18 and inversion means 11.
- the reversing means 11 are controlled so as to allow the coating product to be introduced through the arrival stop block 8 2 .
- the return pipe 24 is closed by the inverting means 11.
- the coating product is thus pushed by the scraper 7 subjected to the pressure of the reservoir 17.
- the coating product is distributed to the various stations P comprising the means projection.
- the volume of coating material consumed by the projection means is compensated in line 3 by the coating product contained in the pressure tank 17.
- the level of the coating product in this tank 17 is maintained by the pump 15 between the level low and the high level controlled by the level sensor 21.
- the pressure in this reservoir 17 is kept constant by the pressure control device 22.
- the direction of injection of the coating product is reversed by the inverting means 11.
- the inverting means 11 make it possible to introduce the coating product into the pipe 3, starting from the starting end 3 1 so as to ensure the displacement of the scraper 7 to the arrival end 3. 2 .
- the direction of injection of the coating product is again reversed when the scraper 7 reaches the arrival end 3 2 and so on. This inversion of the injection direction of the coating product is continued during the consumption phase of the coating product which is circulated alternately in a direction and an opposite direction, being pushed by the scraper 7.
- this scanning cycle can be variable and can also be established for a predetermined duration with respect to the consumption phase of the coating product. For example, it may be provided to maintain for a given time the scraper 7 in one and / or the other stop block 8 1 , 8 2 .
- the coating product is pushed either by the pump 15 or by the reservoir 17 through the selection block 18 via the inverting means 11 which ensures the injection into the pipe 3 through the starting stop block 8 1 coating material which returns to the storage reservoir 14 via the arrival stop block 8 2 , the inverting means 11 and the return pipe 24.
- the direction of flow of the coating product to the Inside the pipe 3 is reversed.
- the coating product is pushed to the inverting means 11 which provide the injection in line 3, via the arrival stop block 8 2 , until at the start stop block 8 1 .
- the coating product returns, via the inversion means 11, to the storage tank 14 via the return pipe 24. This inversion cycle can of course be continued.
- Such a process for setting the coating product in motion can thus be during a given period of time and according to a determined cycle during the non-consumption of the coating product by the projection stations.
- Such method avoids the sedimentation of the coating product in the circuit while limiting the product release period as much as possible coating.
- the pipe 3 can be emptied of the coating product and cleaned by a cleaning product introduced with the aid of injection means 30 from a stop block such as the inlet 8 2 .
- this cleaning product is separated from the coating product by the scraper 7.
- the coating product is recovered in the storage tank 14 via the inverting means 11.
- the supply station 4 advantageously comprises a pressure tank 17 for ensuring the circulation of the coating product.
- the pump 15 can take over from the pressurized distribution of the reservoir 17 in case, for example, of spontaneous increase of the flow rate of the coating product in the circuit 3.
- Fig. 2 illustrates another embodiment of a supply station 4 comprising a storage tank 14 connected, via a selection block 18, to a buffer tank 17 ' for storing the coating product whose level is controlled by a sensor of level 21.
- the selection block 18 is also connected via a valve 16 to a pump 15 which supplies the supply line 19 connected to the inverting means 11.
- the other elements of the circulation circuit remain identical to those described. in relation to FIG. 1 and thus bear the same references.
- the operation of this supply station 4 derives from its constitution and makes it possible to implement the operating principle of the invention as explained in FIG. 1.
- the coating product is transferred into the buffer tank 17 ' by the selection block 18 to a level controlled by the level sensor 21.
- the coating product is pressurized by the pump 15 to be fed into the pipe 3, via the supply pipe 19 and the inversion means 11, as explained in relation to FIG. 1.
- the coating product is pushed by the scraper 7 subjected to the pressure of the pump 15.
- the volume consumed by the projection stations P is compensated in line 3 by the stored coating product in the tank 17 ' and kept under pressure by the pump 15.
Landscapes
- Coating Apparatus (AREA)
Abstract
Description
- un racleur disposé à l'intérieur de la conduite et apte à circuler entre les deux extrémités de la conduite,
- au moins un poste de fourniture du produit de revêtement sous pression,
- et des moyens d'inversion du sens d'injection du produit de revêtement sous pression à l'intérieur de la conduite, alimentés par le poste de fourniture et reliés aux deux extrémités de la conduite en étant pilotés par des moyens de commande pour assurer alternativement l'injection du produit de revêtement par l'une et par l'autre extrémité de la conduite d'alimentation de manière à assurer la poussée par le racleur du produit de revêtement à l'intérieur de la conduite selon des mouvements d'aller et de retour.
Claims (12)
- Procédé pour assurer la circulation d'un produit de revêtement dans une conduite d'alimentation (3) de moyens de projection (P), caractérisé en ce qu'on inverse le sens d'injection du produit de revêtement sous pression à l'intérieur de la conduite (3), qui est injecté en amont d'un racleur (7) disposé dans la conduite de manière à assurer la poussée, par ledit racleur, du produit de revêtement à l'intérieur de la conduite selon des mouvements d'aller et de retour.
- Procédé selon la revendication 1, caractérisé en ce qu'on détecte la position du racleur à chacune des deux extrémités (3 1 , 3 2 ) de la conduite en vue d'inverser le sens d'injection du produit de revêtement à l'intérieur de la conduite (3) lorsque le racleur atteint l'une des extrémités.
- Procédé selon la revendication 1 ou 2, caractérisé en ce qu'on alimente la conduite par une canalisation commune (19) alimentant sélectivement l'une ou l'autre des deux extrémités (3 1 , 3 2 ) de la conduite en amont du racleur (7) qui circule ainsi à partir de l'extrémité à partir de laquelle est injecté le produit de revêtement, en direction de l'autre extrémité.
- Procédé selon l'une des revendications 1 à 3, caractérisé en ce qu'on inverse le sens d'injection du produit de revêtement lors de la phase de consommation du produit de revêtement.
- Procédé selon l'une des revendications 1 à 3, caractérisé en ce qu'on inverse le sens d'injection du produit de revêtement lors de la phase de non-consommation du produit de revêtement et on récupère le produit de revêtement poussé par le racleur (7).
- Installation pour assurer la circulation d'un produit de revêtement dans une conduite d'alimentation (3) de moyens de projection (P) dudit produit de revêtement, la conduite étant reliée à au moins un poste (4) de fourniture du produit de revêtement sous pression, caractérisée en ce qu'elle comporte :un racleur (7) disposé à l'intérieur de la conduite et apte à circuler entre les deux extrémités (3 1 , 3 2 ) de la conduite,et des moyens d'inversion (11) du sens d'injection du produit de revêtement sous pression à l'intérieur de la conduite (3), alimentés par le poste de fourniture (4) et reliés aux deux extrémités (3 1 , 3 2 ) de la conduite en étant pilotés par des moyens de commande pour assurer alternativement l'injection du produit de revêtement par l'une et par l'autre extrémités de la conduite d'alimentation (3) de manière à assurer la poussée par le racleur (7) du produit de revêtement à l'intérieur de la conduite selon des mouvements d'aller et de retour.
- Installation selon la revendication 6, caractérisée en ce qu'elle comporte en relation de chaque extrémité (3 1 , 3 2 ) de la conduite, un capteur (12 1 , 12 2 ) de détection du racleur relié aux moyens de commande permettant de piloter les moyens d'inversion (11).
- Installation selon la revendication 6 ou 7, caractérisée en ce que les deux extrémités (3 1 , 3 2 ) de la conduite sont reliées aux moyens d'inversion (11) qui sont alimentés par un unique poste de fourniture (4) du produit de revêtement.
- Installation selon la revendication 6 ou 8, caractérisée en ce que le poste de fourniture (4) du produit de revêtement comporte un réservoir (17) de produit de revêtement sous pression communiquant avec les moyens d'inversion (11) et alimenté par une pompe (15) à partir d'une réserve de stockage (14).
- Installation selon la revendication 9, caractérisée en ce que les moyens d'inversion (11) sont équipés d'une conduite de retour (24) à la réserve de stockage, du produit de revêtement provenant de l'une ou l'autre extrémités (3 1 , 3 2 ) de la conduite de circulation, la conduite de retour (24) étant fermée ou ouverte respectivement pour la phase de consommation et pour la phase de non consommation ou vidange de la conduite.
- Installation selon l'une des revendications 6 à 10, caractérisée en ce qu'elle comporte à chaque extrémité (3 1 , 3 2 ) de la conduite d'alimentation, un bloc d'arrêt (8 1 , 8 2 ) du racleur relié d'un côté à une extrémité de la conduite d'alimentation et de l'autre côté aux moyens d'inversion (11) du sens d'injection du produit de revêtement.
- Installation selon la revendication 11, caractérisée en ce qu'elle comporte des moyens d'injection (30) d'un produit de nettoyage au niveau d'un bloc d'arrêt (8 1 , 8 2 ) de manière à assurer le déplacement du racleur (7) par le produit de nettoyage et la récupération du produit de revêtement poussé par le racleur (7) dans la réserve de stockage (14).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0402866A FR2867701B1 (fr) | 2004-03-19 | 2004-03-19 | Procede et installation pour assurer la circulation sans cisaillement d'un produit de revetement notamment pour l'industrie automobile |
FR0402866 | 2004-03-19 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1577017A2 true EP1577017A2 (fr) | 2005-09-21 |
EP1577017A3 EP1577017A3 (fr) | 2005-12-28 |
Family
ID=34834203
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05356050A Withdrawn EP1577017A3 (fr) | 2004-03-19 | 2005-03-18 | Procédé et installation pour assurer la circulation sans cisaillement d'un produit de revêtement |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1577017A3 (fr) |
FR (1) | FR2867701B1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2900846A1 (fr) * | 2006-05-15 | 2007-11-16 | Electro Technic Sarl | Perfectionnement aux installations de brumisation haute pression |
CN102706793A (zh) * | 2012-06-01 | 2012-10-03 | 华南理工大学 | 一种电力防污试验方法及装置 |
CN102728503A (zh) * | 2012-06-01 | 2012-10-17 | 华南理工大学 | 一种用于电力防污试验的模拟降雨平台 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2222789A (en) * | 1988-09-15 | 1990-03-21 | Henry Tomasz Lupa | Paint spraying systems |
EP1186349A1 (fr) * | 2000-09-11 | 2002-03-13 | Abb Flexible Automation | Dispositif de distribution d'un ou de plusieurs produits et procédé de distribution utilisant un tel dispositif |
FR2832331A1 (fr) * | 2001-11-16 | 2003-05-23 | Etcm Ensemblier | Installation autonome et amovible de raclage de canalisations en circuit ferme destinee notamment aux rincages des lignes peinture effectues lors des changements de teinte dans l'industrie automobile |
-
2004
- 2004-03-19 FR FR0402866A patent/FR2867701B1/fr not_active Expired - Fee Related
-
2005
- 2005-03-18 EP EP05356050A patent/EP1577017A3/fr not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2222789A (en) * | 1988-09-15 | 1990-03-21 | Henry Tomasz Lupa | Paint spraying systems |
EP1186349A1 (fr) * | 2000-09-11 | 2002-03-13 | Abb Flexible Automation | Dispositif de distribution d'un ou de plusieurs produits et procédé de distribution utilisant un tel dispositif |
FR2832331A1 (fr) * | 2001-11-16 | 2003-05-23 | Etcm Ensemblier | Installation autonome et amovible de raclage de canalisations en circuit ferme destinee notamment aux rincages des lignes peinture effectues lors des changements de teinte dans l'industrie automobile |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2900846A1 (fr) * | 2006-05-15 | 2007-11-16 | Electro Technic Sarl | Perfectionnement aux installations de brumisation haute pression |
EP1864718A1 (fr) * | 2006-05-15 | 2007-12-12 | Electro Technic | Perfectionnement aux installations de brumisation haute pression |
CN102706793A (zh) * | 2012-06-01 | 2012-10-03 | 华南理工大学 | 一种电力防污试验方法及装置 |
CN102728503A (zh) * | 2012-06-01 | 2012-10-17 | 华南理工大学 | 一种用于电力防污试验的模拟降雨平台 |
Also Published As
Publication number | Publication date |
---|---|
EP1577017A3 (fr) | 2005-12-28 |
FR2867701A1 (fr) | 2005-09-23 |
FR2867701B1 (fr) | 2006-07-21 |
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