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EP1502659B1 - Ensemble de valves de changement de couleur d'une installation de revêtement - Google Patents

Ensemble de valves de changement de couleur d'une installation de revêtement Download PDF

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Publication number
EP1502659B1
EP1502659B1 EP20040016360 EP04016360A EP1502659B1 EP 1502659 B1 EP1502659 B1 EP 1502659B1 EP 20040016360 EP20040016360 EP 20040016360 EP 04016360 A EP04016360 A EP 04016360A EP 1502659 B1 EP1502659 B1 EP 1502659B1
Authority
EP
European Patent Office
Prior art keywords
valve
needle
piston
collecting channel
force
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP20040016360
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German (de)
English (en)
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EP1502659A1 (fr
Inventor
Stefano Giuliano
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.)
Duerr Systems AG
Original Assignee
Duerr Systems AG
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Filing date
Publication date
Application filed by Duerr Systems AG filed Critical Duerr Systems AG
Publication of EP1502659A1 publication Critical patent/EP1502659A1/fr
Application granted granted Critical
Publication of EP1502659B1 publication Critical patent/EP1502659B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/14—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet
    • B05B12/149—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 characterised by colour change manifolds or valves therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/85978—With pump

Definitions

  • the invention relates to a color change valve arrangement for selectively connecting an application organ of a coating system with a plurality of supply lines for coating material of different selectable colors according to the preamble of the claim.
  • Such valve arrangements which are required in coating plants for the serial coating of workpieces such as motor vehicle bodies, are i.a. from DE 198 36 604 and DE 198 46 073.
  • valve units in turn consist of pin or needle valves whose valve needle is pressed by a compression spring in the closed position and opened against the force of a pneumatically controlled piston actuator.
  • the valve needles along the usually straight collecting channel juxtaposed valve units are moved in mutually parallel planes, the perpendicular to the collecting channel axis, but can also be arranged obliquely to improve the flow conditions (DE 198 46 073, WO 02/09886).
  • color changer the square reduction instead of the usual straight collecting channel arranged at right angles to the longitudinal axis of the color change block spiral groove (DE 43 39 301), which is less aerodynamic than a straight collecting channel.
  • color changers of the genre considered here are characterized by considerable advantages such as dead space freedom, good flushability, low dead volume, small size, low weight, modular design, small variety of parts, ease of installation, maintenance and repair etc. They have therefore proven themselves in practice for a long time.
  • a disadvantage of the known color changers but their number of selectable shades corresponding length in the longitudinal direction of the common collection channel.
  • the known color changer are relatively poor for installation in confined spaces of coating machines such as painting robots and even worse for installation in the mounted on these machines atomizer itself, as inter alia from the EP 04016359 in the simultaneous application (according to DE 103 34 412.8) may be desirable.
  • the invention is therefore based on the object to reduce the length of the color changer in the longitudinal direction of the common valve manifold common channel and in particular the size of the valve units transversely to the needle axes to a minimum, without thereby worsen the required sealing effect of the valve seat against the valve needle.
  • the invention assumes that for the safe and reliable operation of the valves whose needles (which means any pins) are in the closed position with a certain minimum force, which must not be exceeded because of the required sealing effect against the valve seat must be pressed.
  • the invention is based on the finding that, when this necessary minimum closing force and / or appropriate reinforcement of the force available for overcoming the minimum closing force, possibilities of miniaturization of the valve unit open, in particular in one dimension, transversely to the needle axis and thus in the longitudinal direction of the collecting channel , As a result, the color changer is better than previously for installation in small spaces with limited space such as in relatively slim robot arms or relatively small atomizers.
  • the invention is suitable for color changer with or without color circulation (by the known return channels) as a single color changer or to form two-color changers, which are known to have common color supply lines and are connected to the atomizer via separate color paths.
  • Well suited for the formation of dual color changers are e.g. According to the invention particularly flat built color change valve arrangements.
  • valve units in many cases, in particular, to shorten the collecting channel length advantageous possibility of arrangement of the valve units in a star design, in which at least two, preferably at least three or four or more valve units whose outlet openings lie in a common transverse to the longitudinal axis of the collecting channel level to the longitudinal axis of the collecting channel are arranged distributed, wherein preferably at least two or more further valve units whose outlet openings are in a second, parallel to the first plane, are arranged so distributed about the longitudinal axis of the collecting channel that the valve units of the second level in the circumferential direction of Collecting channels between the valve units of the first level, so that there is a particularly crowded in the longitudinal direction of the collecting channel arrangement, since the distance between the valve units of the two levels can be smaller than that in the KanalallNicolsrichtu ng measured diameter of the valve units.
  • An expedient possibility consists, in particular, of the surface of the valve seat opposite sealing surface of the valve needle, preferably including its end face and / or the surface of the valve seat of an elastomeric Material to form, so that thanks to the softer sealing materials with relatively low contact force a much better sealing effect can be achieved than before.
  • the elastomeric surface is suitably designed so that no undercuts or dead spaces are formed in which could settle color, and could not be rinsed residue.
  • the elastomeric surface is similar to the previously conventional valve needles and valve seats appropriately shaped so that the sealing edge as close as possible to the collection channel and preferably at least approximately aligned with the inner wall (see, DE 198 36 604).
  • the relevant surfaces of the valve needle and the valve seat can in a conventional manner straight parallel to each other or, for example, in the manner described in DE 102 28 277 curved, wherein the valve needle has a substantially spherical outer contour.
  • a variant of the possibility described here consists of inserting, for example, a spring element made, for example, from an elastomeric O-ring in the interior of a needle tip made, for example, of a plastic such as UHMPE or UHMWPE (ultra-high molecular weight polyethylene) in such a way that an elastically yielding (“soft”) ) Needle point results.
  • a spring element made, for example, from an elastomeric O-ring
  • UHMPE or UHMWPE ultra-high molecular weight polyethylene
  • the invention has the advantage that formed by the O-shaped sealing ring undercuts and dead spaces are avoided in which can not rinse off rinse residues that cause color defects of the coating at later replacement, and that the sealing edge of the needle directly to the collection channel can lie.
  • the closing force is preferably generated by a spring whose force for opening the valve must be overcome by the pressure medium of the piston drive device.
  • a spring with a degressive characteristic is another convenient way to reduce the necessary minimum closing force.
  • the invention is based on the recognition that the greatest closing force is required only in the idle state of the closed valve, while upon actuation of the valve, a decreasing with the piston stroke size of the pressure to be overcome is desirable.
  • a compression spring is used whose characteristic curve when compressing more or less (hard or soft) is sloping curved. The same applies to the per se also possible use of a tension spring instead of the compression spring.
  • the force amplification is to be achieved transversely to the needle axis without enlarging the valve units in at least one dimension, in particular in the dimension corresponding to the diameter of the valve unit, namely in the dimension measured along the collecting channel.
  • the force amplification should rather be associated with a reduction in the size of the valve unit in the said dimension. In other cases, however, an increase in the force exerted on the valve needle by the force amplifying device without increasing the said dimension of the valve unit may be useful.
  • a structurally particularly simple possibility of power amplification consists in the use of a piston which has a non-circular, for example flat, rectangular or oval cross section on the surface acted upon by the pressure medium, wherein the short axis of this cross section should be parallel to the direction in which the valve unit is to be miniaturized, so for example in the longitudinal direction of the collecting channel. Comparing this piston drive with the usual valve drive with a cylindrical piston, it results in the same piston dimension in the direction of the short cross-sectional axis a much larger force (pressure x piston area) and the same force a much narrower piston.
  • the pressure of the piston acting on the medium Since it would be impractical usually because of the associated effort to increase the prevailing in the compressed air networks of currently customary coating systems pressure of 6 or at most 8 bar (minimum dynamic pressure), the required for the piston drive the color change valve arrangement preferably in a small compressed air own separate supply unit are generated, which may already be present in some systems, for example, for pig technology.
  • This separate booster station can supply the valves of the color changer with a pressure of more than 10 bar, preferably at least 20 bar, in typical cases, for example, about 25 bar.
  • the pressure medium can also be a liquid for a hydraulic drive device for acting on the piston.
  • the drive means may further comprise at least two e.g. along the piston movement axis arranged one behind the other, each acted upon by the drive medium piston surfaces which are located in two mutually sealed piston chambers or can be suitably coupled together in any other appropriate manner.
  • the valve unit With a given diameter of the valve unit, a considerable increase in force or, for the same force, a considerable reduction of the valve unit transversely to the needle axis is made possible. It can also be coupled to each other more than two each acted upon by the drive medium piston surfaces.
  • the drive device for loading the piston may include a force transducer for amplifying the force of the pressure medium.
  • Very different force transducers can be used, which are generally intended to convert respectively a relatively low linear force into a higher linear force or, more generally, a given force or pressure component under force amplification into a linear other force.
  • leverage, pulley, toggle, scissors, inclined plane, etc. may be used to augment the force.
  • the valve units are constructed in the usual way with a positive valve seat and the pressure medium is supplied on the side facing away from the collecting channel of the piston, the power amplification may be useful associated with a reversal of motion and / or with the conversion of Linearin rotational movements and vice versa. Embodiments for this will be explained.
  • valve-actuating drive unit which supplies the pressure medium is arranged at a remote location outside the actual valve unit of the color changer and is connected to this by a preferably flexible mechanical drive element.
  • a large sized piston can be used to generate a correspondingly high force for the valve needle without taking up space in the valve unit, which consequently can be made extremely small.
  • the connection can be made for example via a flexible shift shaft (similar to a Bowden cable or the like).
  • valve units may correspond to known constructions, for example Fig. 2 of DE 198 36 604, according to which the valve needle provided with the piston is forced by compressed air against the force of a compression spring in the open position in which they the way for the color or rinsing medium releases into the collecting channel.
  • the opposite opening direction may be more appropriate (positive valve seat as in the mentioned DE 198 46 073).
  • the hitherto customary control technology with pneumatic hoses leading to the valves and solenoid valves installed in an external pneumatic cabinet can accordingly also be used.
  • the opening into the collection channel of the color changer pneumatic valves for Color or flushing media are in this case actuated by compressed air or another compressed gas from a leading through the valve assembly to all valves common compressed gas line, and within the valve assembly can be switched to the conventional pressure connection replacing solenoid valve in the compressed gas path of the pneumatic valve.
  • the control of the solenoid valves is preferably carried out with a leading through the valve assembly data bus for digital control data, which is coupled to the solenoid valves via an electronic circuit.
  • the pilot valves can also be actuated piezo-electrically, whereby a further miniaturization can be achieved.
  • a further possibility for miniaturizing the color changer is the installation of a central control module upstream of the valve units of the kind described in DE 101 42 355 (cf., Fig. 7 to 9).
  • These control modules contain a valve common to the paint valves whose pneumatic output signal corresponds to each to be controlled color valve via a directional control unit can be fed, which contains a certain number in a common housing block formed by openings within the housing block interconnected valves.
  • valve control pilot valves in a separate, for example, cylindrical or annular attachment control unit, which are provided in the hose lines Room and can be connected to a common supply line and possibly an electric cable for controlling the color changer, preferably with fieldbus control.
  • the valve unit 1 shown in FIG. 1 of the color changer described here, with the exception of the cross-sectional shape of the piston corresponds to the prior art and accordingly includes a displaceably mounted valve needle 10 to which the piston 11 is fixed, which is sealed in its circumference in the cylinder chamber 12 slidably is.
  • a spiral spring 13 bears against the piston 11 and is supported on the valve housing 14.
  • the free end of the valve needle 10 is pressed in its rest position forming the closed position against the valve seat 15 of the housing 14.
  • a control valve 16 which may be located in a remote control cabinet when using the conventional control technology, for example
  • the piston 11 is pressed against the force of the spring 13 in the actuating position in which the valve needle 10 is lifted from the valve seat 15 and clears the way for the medium to be controlled, such as dye F, which is directed into the chamber 18 of the valve unit 1 is and exits through the open valve seat 15 in the here shown only as a housing opening collecting channel 19 of the color changer.
  • the arrow 17 indicates the necessary ventilation.
  • Fig. 1A is a section through the circumference of the piston 11 and the cylinder chamber 12 enclosing wall of the housing 14 transverse to the displacement direction and shows in this embodiment oval cross-sectional shape of the piston and the housing, thus in the one transverse direction of a shorter diameter and in the other transverse direction perpendicular thereto has a longer diameter.
  • the modified valve unit 2 shown in FIG. 2 differs from the embodiment according to FIG. 1 in that, as shown, two coaxially spaced two pistons 11 'and 21, which are spaced apart in the longitudinal direction of the needle, are fastened in their own, mutually sealed cylinder chambers 12'. or 22 slidably mounted and in these with open control valve 16 each of the compressed air DL against the force of the spring 13 'are acted upon. Thereby, with a given small diameter of the valve unit 2, the force generated by the compressed air can be doubled.
  • valve unit 3 shown in Fig. 3 are in principle similar to in Fig. 2 also simultaneously acted upon by the compressed air piston surfaces 31 and 32 fixedly connected to the valve needle 30 and arranged coaxially to her in the longitudinal direction one behind the other, so that a similar Force gain results.
  • the two pistons form a hollow cylindrical body 33 with, for example, a cylindrical or oval cross-section, which is displaceably mounted in the housing 34 of the valve unit and forms the first piston surface 31 on its outer side facing the valve seat, at its first end Piston surface 31 facing away from the inner wall of its interior, the second piston surface 32 forms and acted on its opposite to the first piston surface 31 outside of the compression spring 13 " becomes.
  • the cylinder body 33 slides on the correspondingly shaped circumference of a fixedly connected to the housing 34 guide body 35 which seals the adjacent to the second piston surface 32 cylinder chamber 37 against lying on its other side of the other part of the interior of the cylinder body 33 , Said other interior part is vented through an opening 39 of the cylinder body 33.
  • the compressed air DL passes from the cylinder space 12 'of the housing 34 adjacent to the piston surface 31 through a bore 38 passing through the valve needle 30 and the guide body 35 into the second cylinder space 37. Since the interior of the cylinder body 33 is closed except for the vent opening 39 , Here are the two cylinder chambers 12 'and 37 sealed against each other.
  • FIG. 4 shows a first embodiment of a force converter 40 suitable for reducing the valve unit in at least one dimension, which is essentially formed by two toothed racks 41 and 42 displaceable linearly parallel to each other in opposite directions, which are coaxially aligned via a stationary rotatably mounted arrangement firmly interconnected pinions 34 and 44 of different sizes are coupled together.
  • a force converter 40 suitable for reducing the valve unit in at least one dimension, which is essentially formed by two toothed racks 41 and 42 displaceable linearly parallel to each other in opposite directions, which are coaxially aligned via a stationary rotatably mounted arrangement firmly interconnected pinions 34 and 44 of different sizes are coupled together.
  • the drive rack 41 is moved in the direction of the arrow K1 from the pressure available for valve actuation, it transmits this movement to the meshing with it small pinion 43, while the co-rotated larger pinion movement on the meshing with it output rack 42nd transfers.
  • the rack 42 is thereby moved in the direction opposite to the K
  • the pinions and / or racks are preferably arranged at least in pairs to achieve favorable balance of power.
  • the one rack can be realized as a hollow shaft with internal teeth and the other rack than arranged in the hollow shaft shaft with external teeth, resulting in a particularly space-saving in the transverse direction construction.
  • the fixed relative to an outer housing intermediate pinion can be performed as in a cage in any number inside.
  • the drive unit for the valve needle can also be formed by a linear gear with a pivot drive and a spindle.
  • a rotating piston can be converted into a linear motion by the generated rotary motion via the spindle and spindle nut.
  • the force transducer 50 may include a linearly in the direction of the arrow K1 (similar to in Fig. 4) driven first spindle rod 51, the fixedly mounted nut member 52 with axially spaced threaded parts different slope turns. In the other threaded portion sits the second spindle rod 53, which is moved by the rotational movement of the nut member 52 linearly in the same direction as the first spindle rod 51 and in the direction of the arrow K2 exerts a force which is greater than the driving force corresponding to the ratio of the different thread pitches the first spindle rod.
  • Fig. 6 is shown as a force transducer 60, a linear transmission with fluidic force amplification.
  • This example is a hydraulic piston transmission.
  • the force transducer 60 is located in a valve unit which may correspond to FIG. 1 in terms of the ink path (arrows F) controlled by the valve needle 61.
  • the generally cylindrical housing 62 of the valve unit includes two cylinder chambers 622 and 623 axially spaced from each other by a radial partition 621. As shown, from the partition 621 coaxial with the housing 62 there extends a fixedly connected hollow cylinder 624 against the cylinder chamber 623 with a relatively small diameter in the cylinder chamber 622 and ends there in a radially projecting fixed guide pulley 625.
  • the guide disc 625 is seated at its periphery sealed in the interior of a coaxially attached to the valve needle 61 and slidable with it in the housing 62 hollow cylindrical piston body 68 at its outer wall facing away from the valve needle provided for closing the valve Compressive spring 63 engages, which is supported on the other side on the housing partition wall 621.
  • piston 64 which is driven in the manner already described by the control air DL.
  • the piston 64 is here but not attached to the valve needle 61, but extends with a coaxially projecting, for example cylindrical shaft 641 axially displaceable in the stationary hollow cylinder 624 inside.
  • the interior of the hollow cylinder 624 has at 626 an opening in between the sealing fixed guide disc 625 and the axially opposite inner wall of the displaceable piston body 68 formed gap 627.
  • This gap 627 and communicating with her interior of the hollow cylinder 624 are up to the end face of the Piston shaft 641 filled with a hydraulic (or appropriate other, possibly also "plastic") medium.
  • FIG. 7 shows a valve unit 7 with indirect control drive.
  • Its pneumatic drive device 70 which is supplied with the control air DL as pressure medium, contains, similarly to FIG. 1, a cylinder space 72 in which the piston 71 acted upon by the pressure medium is displaceable.
  • the pneumatic drive device 70 is in this example but outside the valve unit 7 and is with this connected by a preferably flexible mechanical connecting element such as the Bowden cable shown with the usual pull wire 73.
  • the puller wire 73 is fixed at its one end to the piston 71 and at the other end to a located in the valve unit 7 and attached to the valve needle connecting piston 74 which is acted upon by the compression spring 75.
  • the valve unit 7 corresponds to that of FIG. 1 and requires no explanation insofar.
  • valve unit 7 connecting piston 74 which is pulled only by the wire 73 in the open position, may have a substantially smaller diameter than the external piston 71, due to its largely arbitrarily large piston area a correspondingly high force for the miniaturized valve unit 7 can generate.
  • miniaturization of the valve unit can also be achieved by means for reducing the oppositely directed force to be overcome by the drive device, that is to say generally achieving the valve closing force required for sufficient sealing action.
  • valve needle 80 shown in FIG. 8 with a conical tip 81 on the radially outer side, the sealing surface 82 of which is rectilinear in cross section abutting against the corresponding conically shaped surface of the valve seat 83 when the valve is closed.
  • at least the sealing surface 82 of the valve needle and / or that of the valve seat 83 should consist of an elastomeric material.
  • an inner part of the needle tip 81 is applied with a completely enclosing elastomeric jacket 84, for example by encapsulation or vulcanization.
  • the end face 85 of the needle tip should in the closed position with the wall of all Valve units common collecting channel 86 are at least approximately aligned, so that no possible dead space is formed in the there opening color channel 87 of the valve unit.
  • the elastomeric material of the jacket 84 is selected in view of the high demands on valve durability and resistance to the paint and other media used; suitable are, for example, plastics such as perfluoroelastomers.
  • FIG. 9 shows another embodiment with a needle tip 91 of the valve needle 90 elastically yielding on its outside.
  • the located at the top 91 elastomeric jacket 94 is integrally formed here an elastic bellows 95 which surrounds the circumference of the needle 90 via a substantial, sufficient to enable the necessary lifting movement part of their length and, for example, attached to a stationary seal 96 or molded in which the needle 90 is guided.
  • Such, particularly good closing valves can be particularly advantageous for example in color changers for 2-component paints.
  • FIG. 10 shows a color changer miniaturized in the longitudinal direction of the common collecting channel 101 for 24 colors in this example, which is composed of a number of modularly arranged sections 102 along the collecting channel, which each distribute four star-shaped with uniform angular intervals around the collecting channel Valve units 103 and 103 'included, the needle axes in the example shown in a common Level perpendicular to the collecting channel 101 lie. If the valve units are to open in a conventional manner with a different angle of 90 ° of their needle axes in the collecting channel 101, are at least the centers of the valve seats of the four valves in a common plane transverse to the collecting channel.
  • valve units of adjacent sections 102 of the color changer are shown offset from one another in each case such that the valve units 103 of the one plane lie in the circumferential direction of the collecting channel 101 in each case in the middle between the adjacent valve units 103 'of the other plane.
  • Fig. 10 of four arranged in a star pin valves in each level of the modular terminal block of the color changer is in many cases an optimum, especially with regard to color change losses, the u.a. also depend on the required diameter of the collecting channel. If, nevertheless, an even flatter design is preferred, a larger number of valves can also be distributed in a plane around the collecting channel, for example six or eight valve units. Not only, but especially in this case unwanted color change losses can be avoided by other measures such as by reducing the collecting channel cross-section through a central inner body (see DE 102 12 601).
  • valve units 103 and 103 ' are not limited to the example described with in each level more distributed around the collecting duct valve units, but can reduce the space requirement be generalized transversely to the collecting channel to the arrangement of only two valve units or even only one valve unit at each level.
  • a single row of valve units may be arranged, in which adjacent valve units are offset from one another by an appropriately selected angle, for example by approximately 45 °, along the collecting channel, such that two interleaved groups each extend longitudinally the collecting channel aligned valve units are formed.
  • the offset angle should be as small as possible in order to save space in the direction transverse to the collecting channel and transversely to the two valve groups, but on the other hand must be chosen such that the distance of the needle axes measured in the longitudinal direction of the collecting channel is smaller than that also in this longitudinal direction measured maximum diameter of the valve units, although a space saving in the longitudinal direction of the collecting channel to be achieved.
  • the mutual distance of the needle longitudinal axes of the adjacent valve units should therefore be smaller than the minimum distance they would have to have the same outer dimensions of the valve units, if the adjacent valve units would be aligned with each other without angular displacement as in known color changer.
  • a color changer 110 is shown schematically, which is connected via a quick-change coupling arrangement to its supply lines.
  • the possibly numerous ink supply lines, such as 112 can be connected via short detachable and closable couplings 113 to short tube pieces 114 within the color changer.
  • an electric plug 116 for the preferred field bus control of the control unit 115 may be provided.
  • Suitable quick-change couplings are known per se, even those that allow a quick separation of pressurized and / or eg filled with paint hose hoses.
  • the color changer illustrated in FIG. 11 may, for example, correspond to the valve arrangement according to FIG. 10. Accordingly, 118 denotes the output of the common collecting channel, 119 and 119 'two circumferentially staggered valve units of adjacent levels, and 120 the line connected to a valve unit line for the control air (DL in Fig. 1, etc.).

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  • Coating Apparatus (AREA)
  • Multiple-Way Valves (AREA)

Claims (13)

  1. Ensemble de soupapes de changement de couleur pour la liaison au choix d'un organe d'application d'une installation de revêtement avec un nombre de conduites d'amenée d'un matériau de revêtement de différentes couleurs à choisir, avec des modules de soupape (1, 2, 3, 103) respectifs pour les couleurs à choisir, qui comportent
    - une ouverture de sortie pour le matériau de revêtement s'écoulant dans la direction de l'organe d'application et qui forme un siège de soupape (15, 83),
    - un pointeau de soupape (10, 20, 30) monté coulissant dans le module de soupape, qui présente une surface d'étanchéité (82) s'appliquant contre le siège de soupape (83) lorsque la soupape est fermée,
    - au moins un piston (11, 33) relié au pointeau de soupape (10, 20, 30), qui est soumis à l'action d'un fluide sous pression (DL) pour l'entraînement du pointeau de soupape,
    - et un dispositif, formé en particulier par un ressort (13), qui exerce sur le pointeau de soupape (10, 20, 30) une force dirigée dans le sens opposé à la pression du fluide sous pression (DL), et avec un dispositif d'entraînement pour l'actionnement du piston (11, 33) par le fluide sous pression, les soupapes débouchant dans un canal de collecte (86, 101) qui leur est commun et au moins deux modules de soupape avec des plans de pointeau de soupape parallèles les uns aux autres étant disposés côte à côte le long du canal de collecte,

    caractérisé en ce que sont prévus des moyens (21, 33, 40, 50, 60, 70 ; 84) pour amplifier la force exercée sur le piston par le dispositif d'entraînement et/ou pour abaisser la force dirigée en sens contraire, nécessaire et qui doit être surmontée par le dispositif d'entraînement.
  2. Ensemble de soupapes de changement de couleur selon la revendication 1 ou son préambule, caractérisé par au moins une ou plusieurs des caractéristiques suivantes :
    a) la surface d'étanchéité (82) du pointeau de soupape (80), faisant face à la surface du siège de soupape (83), de préférence y compris la surface frontale (85) de la pointe du pointeau et/ou la surface du siège de soupape (83), est constituée d'un matériau élastomère ;
    b) le ressort (13) présente une courbe caractéristique dégressive ;
    c) le piston (11) présente, sur la surface sollicitée par le fluide sous pression (DL), une section transversale non circulaire, par exemple plate, rectangulaire ou ovale ;
    d) le fluide sous pression (DL) est amené depuis une source de pression avec une pression supérieure à 10 bars, de préférence d'au moins 20 bars ;
    e) le dispositif d'entraînement contient au moins deux surfaces de piston (11', 21, 31, 32) disposées l'une derrière l'autre le long de l'axe de déplacement du piston, sollicitées chacune par le fluide sous pression ;
    f) le dispositif d'entraînement contient un convertisseur de force (40, 50, 60) pour amplifier la force du fluide sous pression ;
    g) le dispositif d'entraînement (70), auquel est amené le fluide sous pression, se trouve à l'extérieur du module de soupape (7) et est relié à celui-ci par un élément d'entraînement mécanique (73) de préférence flexible.
  3. Ensemble de soupapes de changement de couleur selon la revendication 2, caractérisé en ce que le convertisseur de force (40, 50) contient un dispositif dans lequel un élément d'entraînement (41, 51) déplacé linéairement entraîne, par un élément intermédiaire (43, 44 ; 52) tournant, un élément d'entraînement (44, 53) déplacé linéairement.
  4. Ensemble de soupapes de changement de couleur selon la revendication 3, caractérisé en ce que le convertisseur de force (40), destiné à amplifier la force du fluide sous pression, est formé par au moins deux crémaillères (41, 42) montées de manière à pouvoir coulisser l'une par rapport à l'autre, et qui sont accouplées entre elles par un engrenage à roues dentées (43, 44).
  5. Ensemble de soupapes de changement de couleur selon la revendication 3, caractérisé en ce que le convertisseur de force (50) destiné à amplifier la force, est formé par une transmission comportant deux broches à roulement de billes (51, 53) montées déplaçables l'une par rapport à l'autre, avec des pas de filetage différents.
  6. Ensemble de soupapes de changement de couleur selon la revendication 2, caractérisé en ce que le convertisseur de force (60) est formé par une transmission à piston (64, 68) avec un fluide de transmission par exemple hydraulique, dans lequel le rapport de transmission des forces est déterminé par des surfaces de piston (641, 68) de dimensions différentes.
  7. Ensemble de soupapes de changement de couleur selon la revendication 2, caractérisé en ce que la surface d'étanchéité du pointeau de soupape (90), faisant face à la surface du siège de soupape, est formée par une enveloppe élastomère (94) qui est surmoulée sur un soufflet (95) enfermant le pourtour du pointeau de soupape (90) et fixée de manière fixe par rapport au pointeau de soupape, à son extrémité tournée à l'opposé de la pointe (91) du pointeau.
  8. Ensemble de soupapes de changement de couleur selon l'une des revendications précédentes, caractérisé en ce qu'au moins deux modules de soupape (103, 103'), dont les ouvertures de sortie se situent dans un plan commun s'étendant transversalement à l'axe longitudinal du canal de collecte (101), sont disposés répartis autour de l'axe longitudinal du canal de collecte.
  9. Ensemble de soupapes de changement de couleur selon l'une des revendications précédentes, caractérisé en ce qu'au moins deux modules de soupape (103, 103'), voisins dans la direction longitudinale du canal de collecte (101), sont disposés décalés autour du canal de collecte (101), d'une distance angulaire de leurs axes de pointeau inférieure à 90°C, et l'écartement des axes des pointeaux, mesuré dans la direction longitudinale du canal de collecte (101), est inférieur au diamètre maximal des modules de soupape (103, 103'), également mesuré dans cette direction longitudinale.
  10. Ensemble de soupapes de changement de couleur selon la revendication 9, caractérisé en ce qu'au moins deux modules de soupape (103), dont les ouvertures de sortie se situent dans un premier plan (102) commun, s'étendant transversalement à l'axe longitudinal du canal de collecte (101), sont disposés répartis autour de l'axe longitudinal du canal de collecte (101), et en ce qu'au moins deux autres modules de soupape (103'), dont les ouvertures de sortie se situent dans un deuxième plan parallèle au premier plan, sont disposés répartis autour de l'axe longitudinal du canal de collecte de manière que les modules de soupape (103) d'un plan se situent dans la direction périphérique du canal de collecte entre les modules de soupape (103') de l'autre plan.
  11. Ensemble de soupapes de changement de couleur selon la revendication 10, caractérisé en ce qu'au moins trois modules de soupape (103, 103') sont disposés répartis avec les mêmes distances angulaires, autour de l'axe du canal de collecte (101).
  12. Ensemble de soupapes de changement de couleur selon l'une des revendications précédentes, caractérisé en ce qu'il comporte une conduite sous pression commune à tous les modules de soupape, depuis laquelle le fluide sous pression peut être amené aux modules de soupape, et en ce que chaque module de soupape comporte une soupape commandée électriquement, couplée entre son piston et la conduite sous pression commune.
  13. Ensemble de soupapes de changement de couleur selon l'une des revendications précédentes, caractérisé en ce qu'il est pourvu d'un dispositif de raccordement rapide (113, 116) au moins pour les conduites de raccordement (112, 116) des modules de soupape (119, 119').
EP20040016360 2003-07-28 2004-07-12 Ensemble de valves de changement de couleur d'une installation de revêtement Expired - Lifetime EP1502659B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10334410 2003-07-28
DE10334410 2003-07-28

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EP1502659B1 true EP1502659B1 (fr) 2006-02-22

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US (1) US7097121B2 (fr)
EP (1) EP1502659B1 (fr)
AT (1) ATE318186T1 (fr)
DE (1) DE502004000305D1 (fr)
ES (1) ES2258248T3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006058562A1 (de) 2006-12-12 2008-08-14 Dürr Systems GmbH Beschichtungseinrichtung mit einer Dosiervorrichtung
DE102007029195A1 (de) 2007-06-25 2009-02-19 Dürr Systems GmbH Beschichtungseinrichtung mit einer Dosiervorrichtung
EP2853312A2 (fr) 2006-12-12 2015-04-01 Dürr Systems GmbH Dosage ICC

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US20080007011A1 (en) * 2006-07-07 2008-01-10 Henry Buermann Compressed gas cylinder valve seal having elastomeric overmolded surface
JP5576852B2 (ja) * 2008-03-20 2014-08-20 デュール システムズ ゲゼルシャフト ミット ベシュレンクテル ハフツング 塗装ロボット
DE102009020077A1 (de) * 2009-05-06 2010-11-11 Dürr Systems GmbH Beschichtungsmittelvorrichtung und Beschichtungsvorrichtung
CN101737075B (zh) * 2009-11-05 2011-06-29 王宝山 旋转水幕封孔灭尘装置
EP2425899B1 (fr) * 2010-09-06 2013-08-21 LacTec GmbH Changeur de teinte
FR2972651B1 (fr) * 2011-03-18 2014-01-31 Faurecia Bloc Avant Dispositif de pulverisation de peinture et procede de mise en oeuvre d'un tel dispositif.
EP2987559B1 (fr) * 2014-08-19 2016-12-21 ABB Schweiz AG Changeur de couleur
DE102015008661A1 (de) 2015-07-03 2017-01-05 Dürr Systems Ag Nadelventil
DE102015008659B4 (de) 2015-07-03 2019-06-19 Dürr Systems Ag Beschichtungsmittelventil und Rotationszerstäuber
CN108745741B (zh) * 2018-05-28 2021-03-23 福清市昱捷自动化设备有限公司 一种家用机器人的喷漆装置
CN115090431B (zh) * 2022-07-06 2023-04-07 中国计量大学 一种具有仿水母气体压缩动力装置的气味环发射器

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US4163523A (en) * 1976-12-15 1979-08-07 Vincent Raymond A Multicolor paint dispensing system having a pressure responsive color change valve
JPS6051867B2 (ja) * 1980-08-04 1985-11-15 日本ランズバ−グ株式会社 塗料色替え方法
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006058562A1 (de) 2006-12-12 2008-08-14 Dürr Systems GmbH Beschichtungseinrichtung mit einer Dosiervorrichtung
EP2853312A2 (fr) 2006-12-12 2015-04-01 Dürr Systems GmbH Dosage ICC
EP2853312A3 (fr) * 2006-12-12 2015-10-14 Dürr Systems GmbH Dosage ICC
DE102007029195A1 (de) 2007-06-25 2009-02-19 Dürr Systems GmbH Beschichtungseinrichtung mit einer Dosiervorrichtung

Also Published As

Publication number Publication date
DE502004000305D1 (de) 2006-04-27
ES2258248T3 (es) 2006-08-16
EP1502659A1 (fr) 2005-02-02
US7097121B2 (en) 2006-08-29
ATE318186T1 (de) 2006-03-15
US20050029370A1 (en) 2005-02-10

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