EP2355934A1 - Coating product spraygun and method for resupplying coating product to such a spraygun - Google Patents

Coating product spraygun and method for resupplying coating product to such a spraygun

Info

Publication number
EP2355934A1
EP2355934A1 EP09801512A EP09801512A EP2355934A1 EP 2355934 A1 EP2355934 A1 EP 2355934A1 EP 09801512 A EP09801512 A EP 09801512A EP 09801512 A EP09801512 A EP 09801512A EP 2355934 A1 EP2355934 A1 EP 2355934A1
Authority
EP
European Patent Office
Prior art keywords
projector
spraying
tank
reservoir
spray
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
EP09801512A
Other languages
German (de)
French (fr)
Other versions
EP2355934B1 (en
Inventor
Hervé WALTER
Denis Vanzetto
Franck Gerstch
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 Kremlin SAS
Original Assignee
Sames Technologies SAS
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 Technologies SAS filed Critical Sames Technologies SAS
Publication of EP2355934A1 publication Critical patent/EP2355934A1/en
Application granted granted Critical
Publication of EP2355934B1 publication Critical patent/EP2355934B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • B05B5/1608—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive
    • 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
    • B05B5/16—Arrangements for supplying liquids or other fluent material
    • B05B5/1608—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive
    • B05B5/1675—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive the supply means comprising a piston, e.g. a piston pump
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
    • B05B13/0431—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation with spray heads moved by robots or articulated arms, e.g. for applying liquid or other fluent material to 3D-surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
    • B05B13/0447—Installation or apparatus for applying liquid or other fluent material to conveyed separate articles
    • B05B13/0452—Installation or apparatus for applying liquid or other fluent material to conveyed separate articles the conveyed articles being vehicle bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • B05B15/55—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
    • B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces
    • B05B3/1007—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces characterised by the rotating member
    • B05B3/1014—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces characterised by the rotating member with a spraying edge, e.g. like a cup or a bell

Definitions

  • the present invention relates to a projector which is intended to be moved by a robot to project a coating product to objects to be coated. Furthermore, the present invention relates to a method for replenishing coating product such a projector.
  • coating product is meant a liquid product such as a primer, paint or varnish.
  • FR-A-2 887 474 describes a headlamp comprising a body fixed on the wrist of a multi-axis robot, which moves the headlamp relative to objects to be coated, in this case bodies carried by a conveyor.
  • the projector further includes a coating product reservoir which is housed in a proximal portion of the body.
  • the reservoir has a cylindrical shape that extends along a main axis coincident with the axis of the projector.
  • a turbine and a bowl-shaped spraying member are mounted in the body.
  • the sprayer sprays the coating product generally in a direction of spray which extends the main axis of the projector and its reservoir. In other words, the main axis of the tank is collinear with the direction of spray.
  • the projector therefore has an elongated shape, which limits its agility, that is to say its ability to reach hard to reach areas, especially inside a motor vehicle body.
  • connection duct and the supply duct generate significant pressure drops, which are likely to reduce the flow of solvent, thus slowing the cleaning operations.
  • a specific duct with low pressure drops is necessary to collect the waste during the cleaning of the projector.
  • a cleaning phase lasts about 20 seconds and causes about 25 cm 3 of paint losses.
  • the present invention aims in particular to overcome these disadvantages by providing an agile projector, compact and easy to handle by means of a robot.
  • the invention relates to a projector, for projecting a coating product to objects to be coated, comprising: a body equipped with a flange for fixing the projector on a robot, the robot and / or the flange defining a terminal axis around which the projector is intended to move relative to the objects to be coated; a reservoir of coating material housed in a proximal portion of the body and extending along a major axis; coating material spraying means disposed in a distal portion of the body, the spraying means comprising a spraying member arranged to spray the coating material generally in a direction of spraying;
  • This projector is characterized in that the spray direction and the main axis of the tank are convergent.
  • the reservoir housed in the body is offset angularly with respect to the direction of spray, which facilitates spraying into cavities and cleaning / filling the tank.
  • the angle between the main axis and the direction of spraying is between 50 ° and 100 ° preferably equal to 90 ° ;
  • the terminal axis forms with the direction of spraying an angle of between 110 ° and 130 °, preferably equal to 120 °;
  • the distance between the center of gravity of the headlight and the terminal axis is selected less than 80 mm, preferably 20 mm;
  • the height of the headlamp, measured in the direction of spraying, is selected to be less than 450 mm, preferably 400 mm;
  • the projector has at least one connection port to a coating product circuit, the orifice being located on the external surface of the projector, and it comprises a connection duct connecting the orifice to the reservoir, the connection duct having a length less than or equal to 50 mm;
  • the projector further comprises a valve for controlling the flow, in the projector, of the coating product and a cleaning product, the valve forming part of the connection duct;
  • the spraying means comprise a feed duct for the spraying member, the supply duct extending from the reservoir to the spraying member, the supply duct having a length less than or equal to 300 mm and a maximum diameter less than or equal to 5 mm, preferably to 4 mm;
  • the reservoir comprises a piston for pushing the coating material to the spray means and the projector further comprises an actuator for moving the piston along the main axis, the actuator being housed in the body between the reservoir and the flange;
  • the reservoir is in the form of a cylinder with a circular base whose volume is between 200 cm 3 and 1000 cm 3 and whose cylinder diameter is between 50 mm and 120 mm, preferably equal to 101 mm;
  • the spraying means comprise means for rotating the atomizer member about an axis of rotation substantially coinciding with the direction of spraying.
  • the subject of the present invention is a process for restocking a projector as described above, characterized in that it comprises the following steps: a) completely evacuate the coating product remaining possibly in the tank through the supply duct and the spraying member; b) opening the valve to control the flow of the cleaning product into the tank, the cleaning product flowing downstream of the tank, all through the spray member; c) opening the valve to control the flow of the coating material into the connection duct and into a cleaning duct, so as to fill the tank with the new coating product.
  • FIG. 1 is a section of a projector according to the invention.
  • FIG. 2 is an enlarged view of detail II in FIG.
  • FIG. 1 shows a projector 1 comprising a body 11, a reservoir 10 and spraying means 5.
  • the projector 1 is intended to project a liquid coating product, such as a paint, a primer or a varnish, towards objects to be coated, such as bodies.
  • the reservoir 10 serves to contain the product to be sprayed.
  • the body 11 is equipped with fastening means on a robot 2 of multiaxis type.
  • the envelope of the robot 2 is symbolized in phantom in Figure 1.
  • the robot 2 is intended to move the projector 1 relative to the objects to be coated.
  • the body 11 is equipped with a flange 19, which here has the shape of a ring.
  • the fixing means of the projector 1 on the robot 2 comprise a set of screws bearing on the flange 19.
  • the flange 19 is at the interface between the robot 2 and the projector 1.
  • the flange can have various shapes. , in that it allows the body to be connected to the robot, thus fulfilling the function of a base for the projector.
  • the flange 19 defines a terminal axis Y19 around which the projector 1 moves with respect to the objects to be coated.
  • the terminal axis Y 19 is termed "terminal" because it coincides with the last axis of the robot 2 before the projector 1 itself.
  • the robot 2 has at least six axes for moving the projector 1, including the terminal axis Y19.
  • the terminal axis Y19 is therefore defined by the flange 19 and by the robot 2.
  • the terminal axis can be defined not by the flange, but by the robot alone. .
  • the body 11 is composed of a proximal portion 11.1 and a distal portion 11.2.
  • the reservoir 10 is housed in the proximal portion 11.1, that is to say it is incorporated in the volume delimited by a casing 17 of the body 11.
  • proximal and distal are Employed by reference to the flange 19.
  • proximal qualifies an element relatively close to the flange 19, while the adjective “distal” qualifies an element that is further away.
  • the reservoir 10 is generally in the form of a cylinder with a circular base delimited by a cylindrical surface 10.1 and a base 10.2.
  • the reservoir 10 extends along a main axis X10, which is horizontal in FIG.
  • Vio volume indicated here corresponds to the maximum volume of the reservoir 10.
  • the reservoir 10 has a diameter Di 0 of 100 mm and a length Li 0 of between 50 mm and 100 mm.
  • the volume V 10 of the tank 10 is approximately 0.8 L, ie 800 cm 3 .
  • the diameter Di 0 is between 50 mm and 120 mm and the volume V 10 is between 200 cm 3 and 1000 cm 3 .
  • a disk-shaped piston 18.1 is arranged in the tank 10 to expel the coating material towards the spray means 5, as detailed below.
  • the piston 18.1 is movable in translation along the axis Xio.
  • the projector 1 further comprises an actuator 18 for moving the piston 18.1 in translation along the main axis X10.
  • the actuator 18 may consist of an electric motor or any other equivalent actuator.
  • the actuator 18 has an elongated shape along the main axis Xi 0 .
  • the actuator 18 is housed in the proximal portion 11.1 of the body 11, in a space delimited, on the one hand, by the reservoir 10 and, on the other hand, by the flange 19.
  • the spraying means 5 comprise a bowl 51 , which constitutes a spraying member, and a turbine 52, which forms a means for rotating the bowl 51 about an axis of rotation Y 51 .
  • the spraying means 5 further comprise an injector 53, mounted in a central cavity of the turbine 52, a downstream portion 54 of a supply duct 4, and a spray valve 55, which controls the flow of the fluids in the injector 53, so in the bowl 51.
  • the spray valve 55 opens the downstream portion 54 of the supply duct 4, which allows the flow of the paint through the injector 53 and into the bowl 51.
  • the turbine 52 drives the bowl 51 rotating at high speed.
  • the bowl 51 sprays the paint into fine droplets which thus form a jet 50.
  • the jet 50 generally follows the direction of spraying Y 50 to reach the object to be coated.
  • the bowl 51 is arranged to spray the paint generally in the Y 50 spray direction. Due to the symmetry of revolution of the bowl 51, the jet 50 is in the form of a paraboloid or revolution-symmetrical ogive around the Y 50 spraying direction.
  • Y spraying direction 50 substantially coincides with the axis of rotation Y51 of the bowl 51.
  • the spraying means 5 are disposed in a distal portion 11.2 of the body 11.
  • the distal portion 11.2 forms an envelope which contains the spraying means 5.
  • the distal portion 11.2 projects from the proximal portion 11.1 at the level of the spine. location of the tank 10.
  • the main axis X 0 of the reservoir 10 is perpendicular to the spraying direction Y 50, that is to say it forms an angle 10 of 90 ° with the spraying direction Y 50.
  • the angle Ai 0 is between 50 ° and 100 °.
  • the main axis X10 and the spraying direction Y 50 are convergent.
  • the adjective "converge” designates two directions that are not collinear, confounded or parallel.
  • the adjective "converge” means that they are also intersecting.
  • the adjective "convergent” means that the orthogonal projection of the principal axis Xi 0 , in a plane parallel to the main axis Xi 0 and containing the spraying direction Y 5 is secant to the spraying direction Y 5 o
  • the distal portion 1 1 .2 extends generally in the direction of spraying Y 50 .
  • the terminal axis Yi 9 forms with the spray direction Y 50 an angle A 19 of about 120 °.
  • the angle Ai 9 is between 110 ° and 130 °. Such angle A i 9 gives a great compactness to the projector 1, so good agility in the robot 2.
  • the projector 1 has a port 104.1 for connection to a painting circuit not shown belonging to a replenishment station.
  • Port 104.1 is located on the docking surface 15 of the distal portion 11.1. The paint and the solvent enter the projector 1 through the orifice 104.1, respectively during the filling phases of the tank 10 and the cleaning of the projector 1.
  • the projector 1 further comprises a connection duct 13 connecting the orifice 104.1 to the tank 10 and, more precisely, to its base 10.2.
  • the connecting duct 1 3 extends in the portion d istale 1 1 .1, in a rectilinear manner and perpendicular to the base 10.2 and to the docking surface 15.
  • the connecting duct 13 has a length Li 3 , taken in parallel to the main axis X10.
  • the Li 3 length is about 50 mm. In practice, the length Li 3 is less than or equal to 100 mm.
  • connection duct 13 is formed in part of a valve 100 which controls the flow of paint and solvent into the projector 1. More specifically, the second duct 112 defines the upstream portion of the connecting duct 13.
  • the valve 100 comprises a body 101, a first duct 111 and a second separate duct 112, in which fluids used may flow during the filling phases of the reservoir 10, for the purpose of spraying and cleaning, that is, ie paint, solvent and compressed air.
  • the valve 100 further comprises a first needle 130 and a second needle 160, whose function is to allow or not the flow of these fluids.
  • the body 101 houses the first needle 130 and the second needle 160.
  • the first needle 130 defines a housing adapted to receive a substantial portion of the second needle 160.
  • the feed duct 4 consisting of an upstream portion 14 and a downstream portion 54, and extending from the base 10.2 of the tank 10 to the bowl 51, here has a length of about 260 mm, which must be minimized, and a maximum diameter of about 4 mm.
  • the length of the supply duct 4 is less than or equal to 300 mm and its maximum diameter is less than or equal to 5 mm.
  • the injector 53 has a diameter that can reach 3 mm.
  • the injector 53 has a relatively short length, so that it generates limited pressure losses.
  • the projector 1 further comprises a cleaning duct 16.1 which extends between the valve 100 and the spraying means 5.
  • the cleaning duct 16.1 is shown schematically in dashed lines in FIGS. 1 and 2.
  • the cleaning duct is connected to a first downstream section 16.2 and a second downstream section 16.3.
  • the first downstream section 16.2 opens to the bowl 51.
  • the second downstream section 16.3 opens into the injector 53.
  • the cleaning duct 16.1 and the downstream sections 16.2 and 16.3 channel the solvent to and in the spraying means 5, so as to clean or rinse the injector 53 and the surfaces of the bowl 51. More specifically, the cleaning phase involves Compressed air and solvent trains are used to remove paint deposited on soiled surfaces.
  • the valve 100 is particularly compact.
  • the length Li 3 of the duct 13 is relatively short, which makes it possible to minimize the paint losses and the solvent consumption during the cleaning and replenishing phases of the tank 10.
  • a method of replenishing the projector 1 with the coating product, by example in painting first comprises a step where it is completely removed any paint remaining in the tank 10. This residual paint is discharged through the supply duct 4 and through the bowl 51.
  • valve 100 we open the valve 100 to deliver all the solvent in the tank 10, in the cleaning pipe 16.1, the downstream sections 16.2 and 16.3 and downstream of the tank 10, through the bowl 51, where it can be recovered. Then, the valve 100 is opened to control the flow of paint in the connecting pipe 13, so as to fill the tank 10 with a paint of a new color.
  • the projector 1 may be devoid of paint and solvent waste collection circuit.
  • the height H 1 of the projector 1 measured in the direction of spray Y 5 o ⁇ st about 390 mm.
  • the height H 1 of the projector 1 is selected less than 450 mm, preferably 400 mm.
  • Such a height H 1 facilitates access and clearance of the projector 1 and the robot 2 to hard to reach areas, which is important because the minimum distance between the bowl 51 and the object to be coated is about 200 mm when electrostatic projection.
  • the arrangement of the reservoir 10, with its main axis X 10 not parallel to the spraying direction Y 50 gives the projector 1 good compactness, so great agility to the robot 2.
  • “agility” is meant the ability projector 1 or robot 2 to reach hard to reach areas, especially inside a body.
  • the center of gravity G 1 of the headlamp 1 is positioned closer to the terminal axis Y 19 than the center of gravity of a headlamp of the prior art.
  • the center of gravity G 1 shown in FIG. 1 is that of the headlamp 1 when the tank 10 is full, as during the projection phase.
  • the empty center of gravity is relatively close to the center of gravity d, because the mass of paint contained in the tank 10 is negligible in front of the mass of the projector 1.
  • the distance H 19 between the center of gravity Gi and the terminal axis Yi 9 is about 10 mm.
  • the distance Hi 9 is measured "shortest", that is to say perpendicularly to the terminal axis Yi 9 . In practice, this distance Hi 9 is selected less than 80 mm, preferably 20 mm.
  • the center of gravity of a projector of the prior art is generally located more than 100 mm from the terminal axis.

Landscapes

  • Spray Control Apparatus (AREA)
  • Nozzles (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Electrostatic Spraying Apparatus (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)

Abstract

This spraygun (1) comprises a body (11) and, housed in a proximal part (11.1) of the body (11), a tank (10) extending along a main axis (X10). This spraygun also comprises atomizing means (5) in a distal part (11.2) of the body (11) comprising an atomizing member (51) designed to atomize the coating product generally in an atomizing direction (Y50). The atomizing direction (Y50) and the main axis (X10) of the tank are convergent.

Description

PROJECTEUR DE PRODUIT DE REVETEMENT ET PROCEDE POUR REAPPROVISIONNER UN TEL PROJECTEUR EN PRODUIT DE REVETEMENT COATING PRODUCT PROJECTOR AND METHOD FOR REPAIRING SUCH A PROJECTOR AS A COATING PRODUCT
La présente invention concerne un projecteur qui est destiné à être déplacé par un robot pour projeter un produit de revêtement vers des objets à revêtir. Par ailleurs, la présente invention concerne un procédé pour réapprovisionner en produit de revêtement un tel projecteur. Par « produit de revêtement » on désigne un produit liquide tel qu'un apprêt, une peinture ou un vernis.The present invention relates to a projector which is intended to be moved by a robot to project a coating product to objects to be coated. Furthermore, the present invention relates to a method for replenishing coating product such a projector. By "coating product" is meant a liquid product such as a primer, paint or varnish.
FR-A-2 887 474 décrit un projecteur comportant un corps fixé sur le poignet d'un robot multiaxes, lequel déplace le projecteur par rapport à des objets à revêtir, en l'occurrence des carrosseries transportées par un convoyeur. Le projecteur comporte en outre un réservoir de produit de revêtement qui est logé dans une partie proximale du corps. Le réservoir a une forme cylindrique qui s'étend suivant un axe principal confondu avec l'axe du projecteur. Une turbine et un organe de pulvérisation en forme de bol sont montés dans le corps. Comme le montre la comparaison des figures 1 et 2 de FR-A-2 887 474, l'organe de pulvérisation pulvérise le produit de revêtement globalement suivant une direction de pulvérisation qui prolonge l'axe principal du projecteur et de son réservoir. En d'autres termes, l'axe principal du réservoir est colinéaire à la direction de pulvérisation.FR-A-2 887 474 describes a headlamp comprising a body fixed on the wrist of a multi-axis robot, which moves the headlamp relative to objects to be coated, in this case bodies carried by a conveyor. The projector further includes a coating product reservoir which is housed in a proximal portion of the body. The reservoir has a cylindrical shape that extends along a main axis coincident with the axis of the projector. A turbine and a bowl-shaped spraying member are mounted in the body. As shown in the comparison of FIGS. 1 and 2 of FR-A-2 887 474, the sprayer sprays the coating product generally in a direction of spray which extends the main axis of the projector and its reservoir. In other words, the main axis of the tank is collinear with the direction of spray.
Le projecteur a donc une forme allongée, ce qui limite son agilité, c'est-à- dire son aptitude à atteindre des régions difficilement accessibles, notamment à l'intérieur d'une carrosserie de véhicule automobile.The projector therefore has an elongated shape, which limits its agility, that is to say its ability to reach hard to reach areas, especially inside a motor vehicle body.
Par ailleurs, la longueur et l'étroitesse du conduit de connexion et du conduit d'alimentation génèrent des pertes de charge importantes, qui sont susceptibles de réduire le débit de solvant, donc de ralentir les opérations de nettoyage. Un conduit spécifique à faibles pertes de charges est nécessaire pour collecter les déchets lors du nettoyage du projecteur. Ainsi, dans une installation de projection de peinture conventionnelle, une phase de nettoyage dure environ 20 s et occasionne environ 25 cm3 de pertes de peinture.Furthermore, the length and narrowness of the connection duct and the supply duct generate significant pressure drops, which are likely to reduce the flow of solvent, thus slowing the cleaning operations. A specific duct with low pressure drops is necessary to collect the waste during the cleaning of the projector. Thus, in a conventional paint spray installation, a cleaning phase lasts about 20 seconds and causes about 25 cm 3 of paint losses.
La présente invention vise notamment à remédier à ces inconvénients, en proposant un projecteur agile, compact et simple à manipuler au moyen d'un robot. A cet effet, l'invention a pour objet un projecteur, pour projeter un produit de revêtement vers des objets à revêtir, comportant : un corps équipé d'une bride pour la fixation du projecteur sur un robot, le robot et/ou la bride définissant un axe terminal autour duquel est destiné à se déplacer le projecteur par rapport aux objets à revêtir ; un réservoir de produit de revêtement logé dans une partie proximale du corps et s'étendant selon un axe principal ; des moyens de pulvérisation du produit de revêtement disposés dans une partie distale du corps, les moyens de pulvérisation comprenant un organe de pulvérisation agencé pour pulvériser le produit de revêtement globalement suivant une direction de pulvérisation ; Ce projecteur est caractérisé en ce que la direction de pulvérisation et l'axe principal du réservoir sont convergents.The present invention aims in particular to overcome these disadvantages by providing an agile projector, compact and easy to handle by means of a robot. For this purpose, the invention relates to a projector, for projecting a coating product to objects to be coated, comprising: a body equipped with a flange for fixing the projector on a robot, the robot and / or the flange defining a terminal axis around which the projector is intended to move relative to the objects to be coated; a reservoir of coating material housed in a proximal portion of the body and extending along a major axis; coating material spraying means disposed in a distal portion of the body, the spraying means comprising a spraying member arranged to spray the coating material generally in a direction of spraying; This projector is characterized in that the spray direction and the main axis of the tank are convergent.
Grâce à l'invention, le réservoir logé dans le corps est décalé angulairement par rapport à la direction de pulvérisation, ce qui facilite la pulvérisation dans des cavités et le nettoyage/remplissage du réservoir.Thanks to the invention, the reservoir housed in the body is offset angularly with respect to the direction of spray, which facilitates spraying into cavities and cleaning / filling the tank.
Selon d'autres caractéristiques avantageuses mais facultatives de l'invention, prises isolément ou selon toute combinaison techniquement admissible : - l'angle entre l'axe principal et la direction de pulvérisation est compris entre 50° et 100° de préférence égal à 90°;According to other advantageous but optional features of the invention, taken separately or in any technically acceptable combination: the angle between the main axis and the direction of spraying is between 50 ° and 100 ° preferably equal to 90 ° ;
- l'axe terminal forme avec la direction de pulvérisation un angle compris entre 110° et 130° de préférence égal à 120°;the terminal axis forms with the direction of spraying an angle of between 110 ° and 130 °, preferably equal to 120 °;
- la distance entre le centre de gravité du projecteur et l'axe terminal est sélectionnée inférieure à 80 mm, de préférence à 20 mm ;the distance between the center of gravity of the headlight and the terminal axis is selected less than 80 mm, preferably 20 mm;
- la hauteur du projecteur, mesurée suivant la direction de pulvérisation, est sélectionnée inférieure à 450 mm, de préférence à 400 mm ;the height of the headlamp, measured in the direction of spraying, is selected to be less than 450 mm, preferably 400 mm;
- le projecteur présente au moins un orifice de connexion à un circuit de produit de revêtement, l'orifice étant situé sur la surface externe du projecteur, et il comprend un conduit de connexion reliant l'orifice au réservoir, le conduit de connexion ayant une longueur inférieure ou égale à 50 mm ; - le projecteur comprend en outre une vanne pour commander l'écoulement, dans le projecteur, du produit de revêtement et d'un produit de nettoyage, la vanne formant une partie du conduit de connexion ;the projector has at least one connection port to a coating product circuit, the orifice being located on the external surface of the projector, and it comprises a connection duct connecting the orifice to the reservoir, the connection duct having a length less than or equal to 50 mm; the projector further comprises a valve for controlling the flow, in the projector, of the coating product and a cleaning product, the valve forming part of the connection duct;
- les moyens de pulvérisation comprennent un conduit d'alimentation de l'organe de pulvérisation, le conduit d'alimentation s'étendant depuis le réservoir jusqu'à l'organe de pulvérisation, le conduit d'alimentation ayant une longueur inférieure ou égale à 300 mm et un diamètre maximal inférieur ou égal à 5 mm, de préférence à 4 mm ;the spraying means comprise a feed duct for the spraying member, the supply duct extending from the reservoir to the spraying member, the supply duct having a length less than or equal to 300 mm and a maximum diameter less than or equal to 5 mm, preferably to 4 mm;
- le réservoir comprend un piston pour pousser le produit de revêtement vers les moyens de pulvérisation et le projecteur comporte en outre un actionneur pour déplacer le piston suivant l'axe principal, l'actionneur étant logé dans le corps entre le réservoir et la bride ;- The reservoir comprises a piston for pushing the coating material to the spray means and the projector further comprises an actuator for moving the piston along the main axis, the actuator being housed in the body between the reservoir and the flange;
- le réservoir est en forme de cylindre à base circulaire dont le volume est compris entre 200 cm3 et 1000 cm3 et dont le diamètre du cylindre est compris entre 50 mm et 120 mm, de préférence égal à 101 mm ; etthe reservoir is in the form of a cylinder with a circular base whose volume is between 200 cm 3 and 1000 cm 3 and whose cylinder diameter is between 50 mm and 120 mm, preferably equal to 101 mm; and
- les moyens de pulvérisation comprennent des moyens d'entraînement en rotation de l'organe de pulvérisation autour d'un axe de rotation coïncidant sensiblement avec la direction de pulvérisation.the spraying means comprise means for rotating the atomizer member about an axis of rotation substantially coinciding with the direction of spraying.
Par ailleurs, la présente invention a pour objet un procédé, pour réapprovisionner en produit de revêtement un projecteur tel qu'exposé ci-dessus, caractérisé en ce qu'il comprend les étapes suivantes : a) évacuer intégralement le produit de revêtement restant éventuellement dans le réservoir à travers le conduit d'alimentation et l'organe de pulvérisation ; b) ouvrir la vanne pour commander l'écoulement du produit de nettoyage dans le réservoir, le produit de nettoyage s'écoulant, en aval du réservoir, en totalité à travers l'organe de pulvérisation ; c) ouvrir la vanne pour commander l'écoulement du produit de revêtement dans le conduit de connexion et dans un conduit de nettoyage, de façon à remplir le réservoir avec le nouveau produit de revêtement. L'invention sera bien comprise et ses avantages ressortiront aussi à la lumière de la description qui va suivre, donnée uniquement à titre d'exemple non limitatif et faite en référence aux dessins annexés, dans lesquels :Furthermore, the subject of the present invention is a process for restocking a projector as described above, characterized in that it comprises the following steps: a) completely evacuate the coating product remaining possibly in the tank through the supply duct and the spraying member; b) opening the valve to control the flow of the cleaning product into the tank, the cleaning product flowing downstream of the tank, all through the spray member; c) opening the valve to control the flow of the coating material into the connection duct and into a cleaning duct, so as to fill the tank with the new coating product. The invention will be well understood and its advantages will also emerge in the light of the description which follows, given solely by way of nonlimiting example and with reference to the appended drawings, in which:
- la figure 1 est une coupe d'un projecteur en conforme à l'invention ; - et la figure 2 est une vue à plus grande échelle du détail II à la figure 1.- Figure 1 is a section of a projector according to the invention; and FIG. 2 is an enlarged view of detail II in FIG.
La figure 1 montre un projecteur 1 comportant un corps 11 , un réservoir 10 et des moyens de pulvérisation 5. Le projecteur 1 est destiné à projeter un produit de revêtement liquide, tel qu'une peinture, un apprêt ou un vernis, vers des objets à revêtir, tels que des carrosseries. Le réservoir 10 a pour fonction de contenir le produit à pulvériser.FIG. 1 shows a projector 1 comprising a body 11, a reservoir 10 and spraying means 5. The projector 1 is intended to project a liquid coating product, such as a paint, a primer or a varnish, towards objects to be coated, such as bodies. The reservoir 10 serves to contain the product to be sprayed.
Le corps 11 est équipé de moyens de fixation sur un robot 2 de type multiaxes. L'enveloppe du robot 2 est symbolisée en traits mixtes à la figure 1. Le robot 2 est destiné à déplacer le projecteur 1 par rapport aux objets à revêtir. Pour monter le projecteur 1 sur le robot 2, le corps 11 est équipé d'une bride 19, qui a ici la forme d'une couronne. Les moyens de fixation du projecteur 1 sur le robot 2 comprennent un ensemble de vis en appui sur la bride 19. La bride 19 se trouve à l'interface entre le robot 2 et le projecteur 1. En pratique, la bride peut présenter diverses formes, dans la mesure où elle permet la liaison du corps au robot, remplissant ainsi la fonction d'embase pour le projecteur.The body 11 is equipped with fastening means on a robot 2 of multiaxis type. The envelope of the robot 2 is symbolized in phantom in Figure 1. The robot 2 is intended to move the projector 1 relative to the objects to be coated. To mount the projector 1 on the robot 2, the body 11 is equipped with a flange 19, which here has the shape of a ring. The fixing means of the projector 1 on the robot 2 comprise a set of screws bearing on the flange 19. The flange 19 is at the interface between the robot 2 and the projector 1. In practice, the flange can have various shapes. , in that it allows the body to be connected to the robot, thus fulfilling the function of a base for the projector.
La bride 19 définit un axe terminal Y19 autour duquel se déplace le projecteur 1 par rapport aux objets à revêtir. L'axe terminal Y19 est qualifié de « terminal », car il coïncide avec le dernier axe du robot 2 avant le projecteur 1 lui- même. Dans le cas où le robot 2 est un robot multiaxes, le robot 2 possède au moins six axes pour le déplacement du projecteur 1 , dont l'axe terminal Y19. Dans le mode de réalisation illustré par les figures 1 et 2, l'axe terminal Y19 est donc défini par la bride 19 et par le robot 2. Alternativement, l'axe terminal peut être défini non par la bride, mais par le robot seul.The flange 19 defines a terminal axis Y19 around which the projector 1 moves with respect to the objects to be coated. The terminal axis Y 19 is termed "terminal" because it coincides with the last axis of the robot 2 before the projector 1 itself. In the case where the robot 2 is a multi-axis robot, the robot 2 has at least six axes for moving the projector 1, including the terminal axis Y19. In the embodiment illustrated by FIGS. 1 and 2, the terminal axis Y19 is therefore defined by the flange 19 and by the robot 2. Alternatively, the terminal axis can be defined not by the flange, but by the robot alone. .
Le corps 11 est composé d'une partie proximale 11.1 et d'une partie distale 11.2. Le réservoir 10 est logé dans la partie proximale 11.1 , c'est-à-dire qu'il est incorporé dans le volume délimité par une enveloppe 17 du corps 11. Dans la présente demande, les adjectifs « proximal » et « distal » sont employés par référence à la bride 19. L'adjectif « proximal » qualifie un élément relativement proche de la bride 19, tandis que l'adjectif « distal » qualifie un élément qui en est plus éloigné.The body 11 is composed of a proximal portion 11.1 and a distal portion 11.2. The reservoir 10 is housed in the proximal portion 11.1, that is to say it is incorporated in the volume delimited by a casing 17 of the body 11. In the present application, the adjectives "proximal" and "distal" are Employed by reference to the flange 19. The adjective "proximal" qualifies an element relatively close to the flange 19, while the adjective "distal" qualifies an element that is further away.
Le réservoir 10 est globalement en forme de cylindre à base circulaire, délimité par une surface cylindrique 10.1 et par une base 10.2. Le réservoir 10 s'étend suivant un axe principal X10, qui est horizontal sur la figure 1. Le volume Vio indiqué ici correspond au volume maximal du réservoir 10. Le réservoir 10 a un diamètre Di0 de 100 mm et une longueur Li0 comprise entre 50 mm et 100 mm. Le volume V10 du réservoir 10 est d'environ 0.8 L, soit 800 cm3. En pratique, le diamètre Di0 est compris entre 50 mm et 120 mm et le volume V10 est compris entre 200 cm3 et 1000 cm3.The reservoir 10 is generally in the form of a cylinder with a circular base delimited by a cylindrical surface 10.1 and a base 10.2. The reservoir 10 extends along a main axis X10, which is horizontal in FIG. Vio volume indicated here corresponds to the maximum volume of the reservoir 10. The reservoir 10 has a diameter Di 0 of 100 mm and a length Li 0 of between 50 mm and 100 mm. The volume V 10 of the tank 10 is approximately 0.8 L, ie 800 cm 3 . In practice, the diameter Di 0 is between 50 mm and 120 mm and the volume V 10 is between 200 cm 3 and 1000 cm 3 .
Un piston 18.1 en forme de disque est agencé dans le réservoir 10 pour en expulser le produit de revêtement en direction des moyens de pulvérisation 5, comme cela est détaillé ci-après. Le piston 18.1 est mobile en translation selon l'axe Xio. Le projecteur 1 comporte en outre un actionneur 18 pour déplacer le piston 18.1 en translation suivant l'axe principal X10. L'actionneur 18 peut être constitué d'un moteur électrique ou de tout autre actionneur équivalent. L'actionneur 18 présente une forme allongée suivant l'axe principal Xi0. L'actionneur 18 est logé dans la partie proximale 11.1 du corps 11 , dans un espace délimité, d'une part, par le réservoir 10 et, d'autre part, par la bride 19. Les moyens de pulvérisation 5 comprennent un bol 51 , qui constitue un organe de pulvérisation, ainsi qu'une turbine 52, qui forme un moyen d'entraînement en rotation du bol 51 autour d'un axe de rotation Y51. Les moyens de pulvérisation 5 comprennent en outre un injecteur 53, monté dans une cavité centrale de la turbine 52, une portion aval 54 d'un conduit d'alimentation 4, ainsi qu'une vanne de pulvérisation 55, qui commande l'écoulement des fluides dans l'injecteur 53, donc dans le bol 51.A disk-shaped piston 18.1 is arranged in the tank 10 to expel the coating material towards the spray means 5, as detailed below. The piston 18.1 is movable in translation along the axis Xio. The projector 1 further comprises an actuator 18 for moving the piston 18.1 in translation along the main axis X10. The actuator 18 may consist of an electric motor or any other equivalent actuator. The actuator 18 has an elongated shape along the main axis Xi 0 . The actuator 18 is housed in the proximal portion 11.1 of the body 11, in a space delimited, on the one hand, by the reservoir 10 and, on the other hand, by the flange 19. The spraying means 5 comprise a bowl 51 , which constitutes a spraying member, and a turbine 52, which forms a means for rotating the bowl 51 about an axis of rotation Y 51 . The spraying means 5 further comprise an injector 53, mounted in a central cavity of the turbine 52, a downstream portion 54 of a supply duct 4, and a spray valve 55, which controls the flow of the fluids in the injector 53, so in the bowl 51.
Lors de la projection de peinture, la vanne de pulvérisation 55 ouvre la portion aval 54 du conduit d'alimentation 4, ce qui permet l'écoulement de la peinture à travers l'injecteur 53 et dans le bol 51. La turbine 52 entraîne le bol 51 en rotation à vitesse élevée. Comme cela est connu en soi, le bol 51 pulvérise la peinture en fines gouttelettes qui forment ainsi un jet 50. Le jet 50 suit globalement la direction de pulvérisation Y50 pour atteindre l'objet à revêtir. Le bol 51 est agencé pour pulvériser la peinture globalement su ivant la direction de pulvérisation Y50. En raison de la symétrie de révolution du bol 51 , le jet 50 est en forme de paraboloïde ou d'ogive à symétrie de révolution autour de la direction de pulvérisation Y50. La direction de pulvérisation Y50 coïncide sensiblement avec l'axe de rotation Y51 du bol 51. Les moyens de pulvérisation 5 sont disposés dans une partie distale 11.2 du corps 11. La partie distale 11.2 forme une enveloppe qui contient les moyens de pulvérisation 5. La partie distale 11.2 est en saillie par rapport à la partie proximale 11.1 au niveau de l'emplacement du réservoir 10. L'axe principal Xi0 du réservoir 10 est perpendiculaire à la direction de pulvérisation Y50, c'est-à-dire qu'il forme un angle A10 de 90° avec la direction de pulvérisation Y50. En pratique l'angle Ai0 est compris entre 50° et 100°. L'axe principal X10 et la direction de pulvérisation Y50 sont donc convergents.When spraying paint, the spray valve 55 opens the downstream portion 54 of the supply duct 4, which allows the flow of the paint through the injector 53 and into the bowl 51. The turbine 52 drives the bowl 51 rotating at high speed. As is known per se, the bowl 51 sprays the paint into fine droplets which thus form a jet 50. The jet 50 generally follows the direction of spraying Y 50 to reach the object to be coated. The bowl 51 is arranged to spray the paint generally in the Y 50 spray direction. Due to the symmetry of revolution of the bowl 51, the jet 50 is in the form of a paraboloid or revolution-symmetrical ogive around the Y 50 spraying direction. Y spraying direction 50 substantially coincides with the axis of rotation Y51 of the bowl 51. The spraying means 5 are disposed in a distal portion 11.2 of the body 11. The distal portion 11.2 forms an envelope which contains the spraying means 5. The distal portion 11.2 projects from the proximal portion 11.1 at the level of the spine. location of the tank 10. the main axis X 0 of the reservoir 10 is perpendicular to the spraying direction Y 50, that is to say it forms an angle 10 of 90 ° with the spraying direction Y 50. In practice the angle Ai 0 is between 50 ° and 100 °. The main axis X10 and the spraying direction Y 50 are convergent.
Dans la présente demande, l'adjectif « convergent » désigne deux directions qui ne sont pas colinéaires, confondues ni parallèles. En d'autres termes, lorsque l'axe principal Xi0 et la direction de pulvérisation Y50 sont coplanaires, l'adjectif « convergent » signifie qu'ils sont également sécants. Lorsque l'axe principal Xi0 et la direction de pulvérisation Y5o ne sont pas coplanaires, l'adjectif « convergent » signifie que la projection orthogonale de l'axe principal Xi0, dans un plan parallèle à l'axe principal Xi0 et contenant la direction de pulvérisation Y5o est sécante à la direction de pulvérisation Y5o-In the present application, the adjective "converge" designates two directions that are not collinear, confounded or parallel. In other words, when the main axis Xi 0 and the spraying direction Y 50 are coplanar, the adjective "converge" means that they are also intersecting. When the principal axis Xi 0 and the spraying direction Y 5 o are not coplanar, the adjective "convergent" means that the orthogonal projection of the principal axis Xi 0 , in a plane parallel to the main axis Xi 0 and containing the spraying direction Y 5 is secant to the spraying direction Y 5 o
Par ailleurs, la partie distale 1 1 .2 s'étend globalement suivant la direction de pulvérisation Y50. En projection dans le plan de la figure 1 , l'axe terminal Yi9 forme avec la direction de pulvérisation Y50 un angle A19 d'environ 120°. En pratique, l'angle Ai9 est compris entre 110° et 130°. Un tel angle A i9 confère une grande compacité au projecteur 1 , donc une bonne agilité au robot 2.Furthermore, the distal portion 1 1 .2 extends generally in the direction of spraying Y 50 . Projected in the plane of Figure 1, the terminal axis Yi 9 forms with the spray direction Y 50 an angle A 19 of about 120 °. In practice, the angle Ai 9 is between 110 ° and 130 °. Such angle A i 9 gives a great compactness to the projector 1, so good agility in the robot 2.
Comme le montre la figure 2, le projecteur 1 présente un orifice 104.1 de connexion à un circuit de peinture non représenté appartenant à une station de réapprovisionnement. L'orifice 104.1 est situé sur la surface d'accostage 15 de la partie distale 1 1 .1 . La peinture et le solvant pénètrent dans le projecteur 1 par l'orifice 104.1 , respectivement pendant les phases de remplissage du réservoir 10 et de nettoyage du projecteur 1.As shown in Figure 2, the projector 1 has a port 104.1 for connection to a painting circuit not shown belonging to a replenishment station. Port 104.1 is located on the docking surface 15 of the distal portion 11.1. The paint and the solvent enter the projector 1 through the orifice 104.1, respectively during the filling phases of the tank 10 and the cleaning of the projector 1.
Le projecteur 1 comprend en outre un conduit de connexion 13 reliant l'orifice 104.1 au réservoir 10 et, plus précisément, à sa base 10.2. Le conduit de connexion 1 3 s'étend dans la partie d istale 1 1 .1 , de façon rectiligne et perpendiculaire à la base 10.2 et à la surface d'accostage 15. Le conduit de connexion 13 a une longueur Li3, prise parallèlement à l'axe principal X10. La longueur Li3 est d'environ 50 mm. En pratique, la longueur Li3 est inférieure ou égale à 100 mm.The projector 1 further comprises a connection duct 13 connecting the orifice 104.1 to the tank 10 and, more precisely, to its base 10.2. The connecting duct 1 3 extends in the portion d istale 1 1 .1, in a rectilinear manner and perpendicular to the base 10.2 and to the docking surface 15. The connecting duct 13 has a length Li 3 , taken in parallel to the main axis X10. The Li 3 length is about 50 mm. In practice, the length Li 3 is less than or equal to 100 mm.
Le conduit de connexion 13 est formé en partie d'une vanne 100 qui commande l'écoulement de la peinture et du solvant dans le projecteur 1. Plus précisément, le deuxième conduit 112 définit la portion amont du conduit de connexion 13.The connection duct 13 is formed in part of a valve 100 which controls the flow of paint and solvent into the projector 1. More specifically, the second duct 112 defines the upstream portion of the connecting duct 13.
La vanne 100 comprend un corps 101 , un premier conduit 111 et un deuxième conduit 112 distinct, dans lesquels peuvent s'écouler des fluides mis en œuvre au cours des phases de remplissage du réservoir 10, de projection et de nettoyage, c'est-à-dire la peinture, le solvant et l'air comprimé. La vanne 100 comprend en outre un premier pointeau 130 et un deuxième pointeau 160, qui ont pour fonction d'autoriser ou non les écoulements de ces fluides. Le corps 101 loge le premier pointeau 130 et le deuxième pointeau 160. De plus, le premier pointeau 130 définit un logement adapté pour recevoir une partie substantielle du deuxième pointeau 160.The valve 100 comprises a body 101, a first duct 111 and a second separate duct 112, in which fluids used may flow during the filling phases of the reservoir 10, for the purpose of spraying and cleaning, that is, ie paint, solvent and compressed air. The valve 100 further comprises a first needle 130 and a second needle 160, whose function is to allow or not the flow of these fluids. The body 101 houses the first needle 130 and the second needle 160. In addition, the first needle 130 defines a housing adapted to receive a substantial portion of the second needle 160.
Par ailleurs, le conduit d'alimentation 4, composé d'une portion amont 14 et d'une portion aval 54, et s'étendant depuis la base 10.2 du réservoir 10 jusqu'au bol 51 , a ici une longueur d'environ 260 mm, qu'il faut minimiser, et un diamètre maximale d'environ 4 mm. En pratique, la longueur du conduit d'alimentation 4 est inférieure ou égale à 300 mm et son diamètre maximal est inférieur ou égal à 5 mm. L'injecteur 53 a un diamètre qui peut atteindre 3 mm. L'injecteur 53 a une longueur relativement courte, si bien qu'il génère des pertes de charge limitées.Furthermore, the feed duct 4, consisting of an upstream portion 14 and a downstream portion 54, and extending from the base 10.2 of the tank 10 to the bowl 51, here has a length of about 260 mm, which must be minimized, and a maximum diameter of about 4 mm. In practice, the length of the supply duct 4 is less than or equal to 300 mm and its maximum diameter is less than or equal to 5 mm. The injector 53 has a diameter that can reach 3 mm. The injector 53 has a relatively short length, so that it generates limited pressure losses.
Le projecteur 1 comporte en outre un conduit de nettoyage 16.1 qui s'étend entre la vanne 100 et les moyens de pulvérisation 5. Le conduit de nettoyage 16.1 est schématisé en traits pointillés sur les figures 1 et 2. Le conduit de nettoyage est relié à un premier tronçon aval 16.2 et à un deuxième tronçon aval 16.3. Le premier tronçon aval 16.2 débouche vers le bol 51. Le deuxième tronçon aval 16.3 débouche dans l'injecteur 53.The projector 1 further comprises a cleaning duct 16.1 which extends between the valve 100 and the spraying means 5. The cleaning duct 16.1 is shown schematically in dashed lines in FIGS. 1 and 2. The cleaning duct is connected to a first downstream section 16.2 and a second downstream section 16.3. The first downstream section 16.2 opens to the bowl 51. The second downstream section 16.3 opens into the injector 53.
Le conduit de nettoyage 16.1 puis les tronçons aval 16.2 et 16.3 canalisent le solvant jusque et dans les moyens de pulvérisation 5, de façon à nettoyer ou rincer l'injecteur 53 et les surfaces du bol 51. Plus précisément, la phase de nettoyage met en œuvre des trains d'air comprimé et de solvant pour ôter la peinture déposée sur les surfaces salies. La vanne 100 est particulièrement compacte. La longueur Li3 du conduit 13 est relativement courte, ce qui permet de minimiser les pertes de peinture et la consommation de solvant lors des phases de nettoyage et de réapprovisionnement du réservoir 10. Un procédé de réapprovisionnement du projecteur 1 en produit de revêtement, par exemple en peinture, comprend d'abord une étape où l'on évacue intégralement la peinture restant éventuellement dans le réservoir 10. Cette peinture résiduelle est évacuée à travers le conduit d'alimentation 4 et à travers le bol 51. Puis, on ouvre la vanne 100 pour débiter la totalité du solvant dans le réservoir 10, dans le conduit de nettoyage 16.1 , les tronçons aval 16.2 et 16.3 et en aval du réservoir 10, à travers le bol 51 , d'où il peut être récupéré. Ensuite, on ouvre la vanne 100 pour commander l'écoulement de peinture dans le conduit de connexion 13, de façon à remplir le réservoir 10 avec une peinture d'une nouvelle teinte. En d'autres termes, le projecteur 1 peut être dépourvu de circuit de collecte des déchets de peinture et de solvant.The cleaning duct 16.1 and the downstream sections 16.2 and 16.3 channel the solvent to and in the spraying means 5, so as to clean or rinse the injector 53 and the surfaces of the bowl 51. More specifically, the cleaning phase involves Compressed air and solvent trains are used to remove paint deposited on soiled surfaces. The valve 100 is particularly compact. The length Li 3 of the duct 13 is relatively short, which makes it possible to minimize the paint losses and the solvent consumption during the cleaning and replenishing phases of the tank 10. A method of replenishing the projector 1 with the coating product, by example in painting, first comprises a step where it is completely removed any paint remaining in the tank 10. This residual paint is discharged through the supply duct 4 and through the bowl 51. Then, we open the valve 100 to deliver all the solvent in the tank 10, in the cleaning pipe 16.1, the downstream sections 16.2 and 16.3 and downstream of the tank 10, through the bowl 51, where it can be recovered. Then, the valve 100 is opened to control the flow of paint in the connecting pipe 13, so as to fill the tank 10 with a paint of a new color. In other words, the projector 1 may be devoid of paint and solvent waste collection circuit.
Par ailleurs, la hauteur H1 du projecteur 1 , mesurée suivant la direction de pulvérisation Y5oβst d'environ 390 mm. En pratique, la hauteur H1 du projecteur 1 est sélectionnée inférieure à 450 mm, de préférence à 400 mm. Une telle hauteur H1 facilite l'accès et le dégagement du projecteur 1 et du robot 2 aux régions difficilement accessibles, ce qui est important, car la distance minimale entre le bol 51 et l'objet à revêtir est d'environ 200 mm lors d'une projection par voie électrostatique. Ainsi, l'agencement du réservoir 10, avec son axe principal X10 non parallèle à la direction de pulvérisation Y50, confère au projecteur 1 une bonne compacité, donc une grande agilité au robot 2. Par « agilité » on désigne l'aptitude du projecteur 1 ou du robot 2 à atteindre des régions difficilement accessibles, notamment à l'intérieur d'une carrosserie.Furthermore, the height H 1 of the projector 1, measured in the direction of spray Y 5 oβst about 390 mm. In practice, the height H 1 of the projector 1 is selected less than 450 mm, preferably 400 mm. Such a height H 1 facilitates access and clearance of the projector 1 and the robot 2 to hard to reach areas, which is important because the minimum distance between the bowl 51 and the object to be coated is about 200 mm when electrostatic projection. Thus, the arrangement of the reservoir 10, with its main axis X 10 not parallel to the spraying direction Y 50 , gives the projector 1 good compactness, so great agility to the robot 2. By "agility" is meant the ability projector 1 or robot 2 to reach hard to reach areas, especially inside a body.
A masse équivalente, le centre de gravité G1 du projecteur 1 est positionné plus près de l'axe terminal Y19 que le centre de gravité d'un projecteur de l'art antérieur. Le centre de gravité G1 représenté sur la figure 1 est celu i du projecteur 1 lorsque le réservoir 10 est plein, comme au cours de la phase de projection. Le centre de gravité à vide est relativement proche du centre de gravité d, car la masse de peinture contenue dans le réservoir 10 est négligeable devant la masse du projecteur 1.At equivalent weight, the center of gravity G 1 of the headlamp 1 is positioned closer to the terminal axis Y 19 than the center of gravity of a headlamp of the prior art. The center of gravity G 1 shown in FIG. 1 is that of the headlamp 1 when the tank 10 is full, as during the projection phase. The empty center of gravity is relatively close to the center of gravity d, because the mass of paint contained in the tank 10 is negligible in front of the mass of the projector 1.
En effet, la distance H19 entre le centre de gravité Gi et l'axe terminal Yi9 est d'environ 10 mm. La distance Hi9 est mesurée « au plus court », c'est-à-dire perpendiculairement à l'axe terminal Yi9. En pratique, cette distance Hi9 est sélectionnée inférieure à 80 mm, de préférence à 20 mm. Le centre de gravité d'un projecteur de l'art antérieur est généralement situé à plus de 100 mm de l'axe terminal.Indeed, the distance H 19 between the center of gravity Gi and the terminal axis Yi 9 is about 10 mm. The distance Hi 9 is measured "shortest", that is to say perpendicularly to the terminal axis Yi 9 . In practice, this distance Hi 9 is selected less than 80 mm, preferably 20 mm. The center of gravity of a projector of the prior art is generally located more than 100 mm from the terminal axis.
Une telle position du centre de gravité Gi, avec une telle distance Hi9, permet de minimiser les moments d'inertie du projecteur 1 autour de l'axe terminal Yi9 .Such a position of the center of gravity Gi, with such a distance Hi 9 , makes it possible to minimize the moments of inertia of the projector 1 around the terminal axis Yi 9 .
On limite ainsi les efforts que doit produire le robot 2, ce qui lui autorise des accélérations supérieures à celles d'un robot équipé d'un projecteur de l'art antérieur. This limits the efforts that must produce the robot 2, which allows accelerations greater than those of a robot equipped with a projector of the prior art.

Claims

REVENDICATIONS
1. Projecteur (1 ), pour projeter un produit de revêtement vers des objets à revêtir, comportant : - un corps (11 ) équipé d'une bride (19) pour la fixation du projecteur (1 ) sur un robot (2), le robot (2) et/ou la bride (19) définissant un axe terminal (Yi9) autour duquel est destiné à se déplacer le projecteur (1 ) par rapport aux objets à revêtir ; un réservoir (10) de produit de revêtement logé dans une partie proximale (11.1 ) du corps (11 ) et s'étendant suivant un axe principal (X10) ; des moyens de pulvérisation (5) du produit de revêtement disposés dans une partie distale (11.2) du corps (11 ), les moyens de pulvérisation (5) comprenant un organe de pulvérisation (51 ) agencé pour pulvériser le produit de revêtement globalement suivant une direction de pulvérisation (Y50) ; le projecteur (1 ) étant caractérisé en ce que la direction de pulvérisation (Y50) et l'axe principal (Xi0) du réservoir (10) sont convergents.1. Projector (1), for projecting a coating product to objects to be coated, comprising: - a body (11) equipped with a flange (19) for fixing the projector (1) on a robot (2), the robot (2) and / or the flange (19) defining a terminal axis (Yi 9 ) around which is intended to move the projector (1) relative to the objects to be coated; a reservoir (10) of coating material housed in a proximal portion (11.1) of the body (11) and extending along a main axis (X10); spraying means (5) of the coating material disposed in a distal portion (11.2) of the body (11), the spraying means (5) comprising a spraying member (51) arranged to spray the coating material generally in a manner spray direction (Y 50 ); the headlamp (1) being characterized in that the spraying direction (Y 50 ) and the main axis (Xi 0 ) of the tank (10) are convergent.
2. Projecteur (1 ) selon la revendication 1 , caractérisé en ce que l'angle (Ai0) entre l'axe principal (Xi0) du réservoir (10) et la direction de pulvérisation (Y50) est compris entre 50°et 100° de préférence égal à 90°.2. Projector (1) according to claim 1, characterized in that the angle (Ai 0 ) between the main axis (Xi 0 ) of the reservoir (10) and the spray direction (Y 50 ) is between 50 ° and 100 ° preferably equal to 90 °.
3. Projecteur (1 ) selon la revendication 2, caractérisé en ce que l'axe terminal (Y19) forme avec la direction de pulvérisation (Y50) un angle (A19) compris entre 110° et 130° de préférence égal à 120°.3. Projector (1) according to claim 2, characterized in that the terminal axis (Y19) forms with the direction of spray (Y 50 ) an angle (A19) between 110 ° and 130 ° preferably equal to 120 ° .
4. Projecteur (1 ) selon l'une des revendications précédentes, caractérisé en ce que la distance (H19) entre le centre de gravité (Gi) du projecteur (1 ) et l'axe terminal (Y19) est sélectionnée inférieure à 80 mm, de préférence à 20 mm.4. Projector (1) according to one of the preceding claims, characterized in that the distance (H19) between the center of gravity (Gi) of the projector (1) and the terminal axis (Y19) is selected less than 80 mm preferably at 20 mm.
5. Projecteur (1 ) selon l'une des revendications précédentes, caractérisé en ce que la hauteur (Hi) du projecteur (1 ), mesurée suivant la direction de pulvérisation (Y50), est sélectionnée inférieure à 450 mm, de préférence à 400 mm. 5. Projector (1) according to one of the preceding claims, characterized in that the height (Hi) of the projector (1), measured in the direction of spray (Y 50 ), is selected less than 450 mm, preferably to 400 mm.
6. Projecteur (1 ) selon l'une des revendications précédentes, caractérisé en ce qu'il présente au moins un orifice (104.1 ) de connexion à un circuit de produit de revêtement, l'orifice (104.1 ) étant situé sur une surface d'accostage (15) du projecteur (1 ), et en ce qu'il comprend un conduit de connexion (13) reliant l'orifice (104.1 ) au réservoir (10), le conduit de connexion (13) ayant une longueur (L13) inférieure ou égale à 50 mm.6. Projector (1) according to one of the preceding claims, characterized in that it has at least one port (104.1) for connection to a coating product circuit, the orifice (104.1) being located on a surface of the docking (15) of the floodlight (1), and in that it comprises a connecting pipe (13) connecting the orifice (104.1) to the tank (10), the connecting pipe (13) having a length (L 13 ) less than or equal to 50 mm.
7. Projecteur (1 ) selon la revendication 6, caractérisé en ce qu'il comprend en outre une vanne (100) pour commander l'écoulement, dans le projecteur (1 ), du produit de revêtement et d'un produit de nettoyage, la vanne (100) formant une partie du conduit de connexion (13).7. Projector (1) according to claim 6, characterized in that it further comprises a valve (100) for controlling the flow in the projector (1), the coating product and a cleaning product, the valve (100) forming part of the connection duct (13).
8. Projecteur (1 ) selon l'une des revendications précédentes, caractérisé en ce q u e l es moyens d e pu lvérisation (5) com pren n ent un conduit d'alimentation (4) de l'organe de pulvérisation (51 ), le conduit d'alimentation (4) s'étendant depuis le réservoir (10) jusqu'à l'organe de pulvérisation (51 ), le conduit d'alimentation ayant une longueur inférieure ou égale à 300 mm et un diamètre maximal inférieur ou égal à 5 mm, de préférence à 4 mm.8. Projector (1) according to one of the preceding claims, characterized in that the spraying means (5) comprises a supply duct (4) of the spraying member (51), the duct supply line (4) extending from the reservoir (10) to the spraying member (51), the supply duct having a length less than or equal to 300 mm and a maximum diameter of less than or equal to 5 mm, preferably at 4 mm.
9. Projecteur (1 ) selon l'une des revendications précédentes, caractérisé en ce que le réservoir (10) comprend un piston (18.1 ) pour pousser le produit de revêtement vers les moyens de pulvérisation (5) et en ce que le projecteur (1 ) comporte en outre un actionneur (18) pour déplacer le piston (18.1 ) suivant l'axe principal (X10), l'actionneur (18) étant logé dans le corps (11 ) entre le réservoir (10) et la bride (19).Projector (1) according to one of the preceding claims, characterized in that the reservoir (10) comprises a piston (18.1) for pushing the coating product towards the spraying means (5) and in that the projector ( 1) further comprises an actuator (18) for moving the piston (18.1) along the main axis (X 10 ), the actuator (18) being housed in the body (11) between the reservoir (10) and the flange (19).
10. Projecteur (1 ) selon l'une des revendications précédentes, caractérisé en ce que le réservoir (10) est en forme de cylindre (10.1 ) à base (10.2) circulaire dont le volume (Vi0) est compris entre 200 cm3 et 1000 cm3 et dont l e diamètre (D10) du cylindre (10.1 ) est compris entre 50 mm et 120 mm, de préférence égal à 101 mm. 10. Projector (1) according to one of the preceding claims, characterized in that the tank (10) is shaped cylinder (10.1) base (10.2) circular whose volume (Vi 0 ) is between 200 cm 3 and 1000 cm 3 and whose diameter (D 10 ) of the cylinder (10.1) is between 50 mm and 120 mm, preferably equal to 101 mm.
11. Projecteur (1 ) selon l'une des revendications précédentes, caractérisé en ce que les moyens de pu lvérisation (5) compren nent des moyens d'entraînement en rotation (52) de l'organe de pulvérisation (51 ) autour d'un axe de rotation (Y51) coïncidant sensiblement avec la direction de pulvérisation (Y50).11. Projector (1) according to one of the preceding claims, characterized in that the means of pulverization (5) comprises means for driving in rotation (52) of the spraying member (51) around an axis of rotation (Y51) substantially coinciding with the direction of spraying (Y50).
1 2. Procédé, pou r réapprovision ner en prod u it de revêtement un projecteur (1 ) selon la revendication 7, caractérisé en ce qu'il comprend les étapes suivantes : a) évacuer intégralement le produit de revêtement restant éventuellement dans le réservoir ( 1 0) à travers le cond u it d'al imentation (4) et l'organe de pulvérisation (51 ) ; b) ouvrir la vanne (100) pour commander l'écoulement du produit de nettoyage dans le réservoir (10) et dans un conduit de nettoyage (16.1 ), le produit de nettoyage s'écoulant, en aval du réservoir (10), en totalité à travers l'organe de pulvérisation (51 ) ; c) ouvrir la vanne (100) pour commander l'écoulement du produit de revêtement dans le conduit de connexion (13), de façon à remplir le réservoir (10) avec le nouveau produit de revêtement. 2. Method, for replenishing in coating a projector (1) according to claim 7, characterized in that it comprises the following steps: a) completely evacuate any coating product remaining in the reservoir ( 1 0) through the supply conduit (4) and the spray member (51); b) opening the valve (100) to control the flow of the cleaning product into the tank (10) and into a cleaning pipe (16.1), the cleaning product flowing downstream of the tank (10), in all through the spray member (51); c) opening the valve (100) to control the flow of the coating material into the connecting pipe (13), so as to fill the tank (10) with the new coating product.
EP09801512.6A 2008-12-09 2009-12-08 Atomiser for a coating material and method for supplying it with coating material Active EP2355934B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0858414A FR2939333B1 (en) 2008-12-09 2008-12-09 COATING PRODUCT PROJECTOR AND METHOD FOR REPAIRING SUCH A PROJECTOR
PCT/FR2009/052452 WO2010067014A1 (en) 2008-12-09 2009-12-08 Coating product spraygun and method for resupplying coating product to such a spraygun

Publications (2)

Publication Number Publication Date
EP2355934A1 true EP2355934A1 (en) 2011-08-17
EP2355934B1 EP2355934B1 (en) 2014-04-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP09801512.6A Active EP2355934B1 (en) 2008-12-09 2009-12-08 Atomiser for a coating material and method for supplying it with coating material

Country Status (10)

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US (1) US8746167B2 (en)
EP (1) EP2355934B1 (en)
JP (1) JP5698144B2 (en)
KR (1) KR101665075B1 (en)
CN (1) CN102292163B (en)
BR (1) BRPI0917607B1 (en)
ES (1) ES2458347T3 (en)
FR (1) FR2939333B1 (en)
RU (1) RU2500485C2 (en)
WO (1) WO2010067014A1 (en)

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Also Published As

Publication number Publication date
US8746167B2 (en) 2014-06-10
US20110277686A1 (en) 2011-11-17
RU2011128016A (en) 2013-01-20
FR2939333B1 (en) 2011-10-21
KR20110102413A (en) 2011-09-16
JP2012511418A (en) 2012-05-24
EP2355934B1 (en) 2014-04-02
FR2939333A1 (en) 2010-06-11
BRPI0917607B1 (en) 2020-01-21
ES2458347T3 (en) 2014-05-05
BRPI0917607A2 (en) 2015-11-17
RU2500485C2 (en) 2013-12-10
WO2010067014A1 (en) 2010-06-17
CN102292163B (en) 2015-04-22
KR101665075B1 (en) 2016-10-12
JP5698144B2 (en) 2015-04-08
CN102292163A (en) 2011-12-21

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