EP3012028B1 - Dispositif de dosage à piston pour milieux liquides pour l'enduction d'objets - Google Patents

Dispositif de dosage à piston pour milieux liquides pour l'enduction d'objets Download PDF

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Publication number
EP3012028B1
EP3012028B1 EP14003631.0A EP14003631A EP3012028B1 EP 3012028 B1 EP3012028 B1 EP 3012028B1 EP 14003631 A EP14003631 A EP 14003631A EP 3012028 B1 EP3012028 B1 EP 3012028B1
Authority
EP
European Patent Office
Prior art keywords
piston
entry
dosing apparatus
exit
input
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.)
Not-in-force
Application number
EP14003631.0A
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German (de)
English (en)
Other versions
EP3012028A1 (fr
Inventor
Felix KLINK
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.)
Eisenmann SE
Original Assignee
Eisenmann SE
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 Eisenmann SE filed Critical Eisenmann SE
Priority to EP14003631.0A priority Critical patent/EP3012028B1/fr
Publication of EP3012028A1 publication Critical patent/EP3012028A1/fr
Application granted granted Critical
Publication of EP3012028B1 publication Critical patent/EP3012028B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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

Definitions

  • the invention relates to a system for coating objects with an application device, which is connected to at least one piston dispenser.
  • Such a piston dispenser is out GB2458841 known.
  • piston dispensers In order to be able to supply the application device with paint and detergent in a well-dosed manner, piston dispensers have established themselves on the market, among other things. There, the working space of the cylinder is filled with paint and this then fed to the application device. Rinsing of the piston dispenser and the lines leading to the application device, which is necessary before a color change, takes place by means of a rinsing agent supplied from another source. However, this can lead to relatively large paint losses and a relatively large need for washing-up liquid, which can be counteracted again, for example, by the above-mentioned pigging technique.
  • the pigging technology can in particular meet another, particularly important condition for safety reasons: In coatings with electrostatically operating application devices, it must be ensured that between application device and one at ground potential lying detergent reservoir or paint reservoir or color changer, as they are known per se, a potential separation is ensured at any time. This is achieved in the pigging technology by an insulating air layer is constructed in the one or more leads from the detergent reservoir or from the ink reservoir or color changer to the piston dispenser, wherein the piston dispenser itself is at the potential of the application device.
  • a space between two piston elements is used as the working space and the supply of material from a source into this working space and the removal of material from this working space out to the application device can be effected by channels in these two piston elements.
  • a volume of material between the two piston elements is set, so that the material can be dispensed well dosed to the application device.
  • the piston assembly as a moving unit between a first position in which the input piston member assumes its filling position, and a second position in which the output piston member assumes its dispensing position, movable in the interior.
  • the piston assembly can be moved as a whole, wherein it carries the introduced material volume with it.
  • an insulation space can be formed, which is filled with an electrically insulating insulating medium.
  • the isolation medium is preferably air. This can For example, take place when the piston assembly is moved as a moving unit in the direction of the output terminal.
  • the input piston member comprises a coupling portion which is complementary to a coupling recess formed on an input side of the piston meter and / or the output piston member comprises a coupling portion which is complementary to a coupling recess formed on an output side of the piston meter.
  • the piston dispenser may be assembled from prefabricated components when the input port is formed on an input block on an input side of the piston dispenser and / or the output port is formed on an output block on an output side of the piston dispenser.
  • the input connection is formed on an input section of the cylinder unit.
  • the input port is then formed on the wall of the cylinder unit.
  • a favorable arrangement of the drive for the piston elements is when the input piston member and / or the output piston member is floatingly mounted.
  • a thrust medium such as compressed air, can be used for propulsion and for the movement of the piston assembly.
  • the input piston element may be coupled to a piston rod which is movable by means of a piston drive provided outside the cylinder unit.
  • the output piston element is then stored floating.
  • At least one locking device is provided, by means of which the input piston element in its filling position and / or the output piston element in its dispensing position at least in the direction of the longitudinal axis the piston dispenser is lockable.
  • the piston dispenser is a piston dispenser with some or all of the features explained above.
  • the potential isolation seizes when the application device works electrostatically.
  • FIG. 1 schematically a system 10 for applying coating media is referred to, which comprises an application device 12.
  • a coating system 10 for paints will be described by way of example.
  • the application device may be, for example, a spray gun or a high-rotation atomizer, as is known per se.
  • the coating system 10 comprises a first piston dispenser 16 and a second piston dispenser 18.
  • the piston dispensers 16 and 18 are identical in construction in the present embodiment; In the following, therefore, only the piston feeder 16 will be explained in detail. The above applies mutatis mutandis to the piston dispenser 18th
  • the piston dispenser 16 is illustrated in various phases of operation of the coating system 10, wherein only in FIG. 2 all components of the piston cylinder 16 are provided with reference numerals.
  • the piston dispenser 16 is made of an electrically non-conductive material and comprises a cylinder unit 20 with a hollow cylinder 20 a, which is made in the present embodiment of glass or plastic.
  • the cylinder unit 20 comprises at a first end side on an inlet side 22 of the piston meter 16 an inlet block 24 and at its opposite end on an outlet side 26 of the piston meter 16 an output block 28, so that an inner space 30 of the piston meter 16 is limited.
  • a the inner space 30 facing cylindrical coupling recesses 32 and 34 respectively formed with a connection bottom 36 and 38, coaxial with the longitudinal axis 40th the cylinder unit 20 and the piston meter 16 are arranged.
  • the longitudinal axis 40 is only in FIG. 2 shown in dashed lines.
  • an input channel 44 extends coaxially to the longitudinal axis 40 and opens at the input side 42 into an input port 46.
  • a control line 48 which extends adjacent to the input channel 44 and opens at the input side 42 in a control terminal 50.
  • an output channel 54 which extends coaxially to the longitudinal axis 40 and opens at the output side 52 into an output port 56.
  • the output block 26 also has a control line 58 which extends adjacent to the output channel 54 and extends between the coupling bottom 38 of the output block 26 and a control terminal 60 at its output side 52.
  • a piston assembly 62 with an input piston member 64 and an output piston member 66, which are formed in the present embodiment as a floating input piston 68 and as floating output piston 70.
  • the input piston 68 comprises a cylindrical coupling portion 72 which is complementary to the coupling recess 32 in the input block 24 and can dip into it.
  • the coupling portion 72 of the input piston 68 merges into a piston body 74, which is complementary to the interior 30 of the piston meter 16 and sealingly abuts against its inner circumferential surface.
  • the input piston 68 has a passage-flow channel 76 which extends from the free end face 78 of the coupling portion 72 to the free end face 80 of the piston body 74 and at the coupling portion 72 has a connection opening 82 which is coaxial with the longitudinal axis 40 and complementary to the input channel 44th is at the coupling bottom 36 of the input block 24.
  • a valve seat 84 is formed, which cooperates with a sealing element 86 of a control valve 88, as it is known per se and which received in a valve receiving space 90 in the piston body 74. is.
  • the control valve 88 By the control valve 88, the flow path through the flow channel 76 can be enabled or disabled.
  • the control valve 88 is configured such that it must be acted upon by a control signal, so that the sealing element 86 occupies a release position and the flow channel 76 releases.
  • Such a release configuration of the control valve 88 shows FIG. 3 , Without such a control signal, the sealing element 86 of the control valve 88 assumes a blocking position in which the flow channel 76 is blocked on the valve seat 84; such a blocking configuration of the control valve 88 is illustrated FIG. 2 ,
  • control valve 88 can be acted upon with a control signal, runs in the input piston 68, a valve control line 92 which extends from the valve receiving space 88 and opens into a ring line 94 which is provided on the free end face 78 of the coupling portion 72.
  • This ring line 94 is coaxial with the longitudinal axis 40 and extends with a ring radius corresponding to the distance between the input channel 44 and the position of the control line 48 at the coupling bottom 36 of the input block 24.
  • the control line 48 of the input block 24 comes into contact with the ring line 94 when the input piston 68 occupies a filling position in which the coupling portion 72 dips into the coupling recess 32 in the input block 24, as it FIG. 2 illustrated.
  • the control terminal 50 at the input block 24 is connected to a signal source 96.
  • the control valve 88 operates pneumatically and as a control signal a control fluid and concrete compressed air is used.
  • the control line 48 in the input block 24 and the valve control line 92 in the input piston 68 are therefore designed as fluidic lines and the ring line 94 as an annular groove 98.
  • the signal source 96 in this case is correspondingly a control fluid source in the form of a compressed air source 100a.
  • a corresponding signal source 96 in the form of a compressed air source 100b is also connected to the output control block 60 at the output block 28.
  • an electrically operating control valve 88 may also be used; In this case, an electrical signal is used as the control signal for the control valve 88 and the control lines 48, 92 and 94 are electrical lines.
  • the piston dispenser 16 also comprises a locking device 102a for the input piston 68, so that it can be locked in its filling position at least in the axial direction immovably.
  • the coupling portion 72 of the input piston 68 on its outer circumferential surface on a circumferential locking groove 104, in which a locking pin 106 can retract from the lateral surface of the coupling recess 32 of the input block 24.
  • the locking pin 106 is in the FIGS. 5 to 9 can be seen and between a retracted position in which it does not project beyond the lateral surface of the coupling recess 32, and an extended locking position, in which it protrudes beyond the lateral surface of the coupling recess 32 in the interior, are moved.
  • the output piston 70 is identical to the input piston 68 and the components of the output piston 70 bear the same reference numerals as the corresponding components in the input piston 68.
  • the output piston 70 is arranged in the interior 30 of the piston meter 16 that its coupling portion 72 from the input piston 68.
  • the output piston 70 assumes a dispensing position.
  • the piston dispenser 16 also includes a locking device 102b for the output piston 70, so that it can be locked in its delivery position at least in the axial direction immovably.
  • a locking device 102b for the output piston 70 comprises a locking pin 106b, which in the locking groove 104 of the output piston 70 can intervene. If the output piston 70 is in its dispensing position and the locking pin 106b is retracted into the locking groove 104 of the output piston 70, this can not be moved axially.
  • an electrically operating control valve 88 may be used. The same applies mutatis mutandis to the input piston 68.
  • the output port 56 is connected at the output block 28 of the piston dispenser 16 via a line 108 to a valve device 110 of the application device 12, which is connected via a further line 112 and in the same manner with the second piston dispenser 18.
  • Valve device 110 is also connected via a flushing agent line 114 to a flushing agent source 116 and via a compressed air line 118 to a compressed air source 120.
  • the input port 46 on the input block 24 of the piston dispenser 16 is connected via a line 122 to a color change unit 124, which can be fed from ring lines 126 with different paints, from a flushing agent source 128 with detergent and from a compressed air source 130 with compressed air and also comprises an outlet line 132 as it is known in and of itself.
  • a color change unit 124 can be fed from ring lines 126 with different paints, from a flushing agent source 128 with detergent and from a compressed air source 130 with compressed air and also comprises an outlet line 132 as it is known in and of itself.
  • FIG. 1 only two ring lines 126 are designated.
  • Another such color changing unit 134 is connected to the piston feeder 18 via a conduit 136 in the same manner.
  • the components of the color changing unit 134 are not specifically provided with reference numerals.
  • control line 48 of the input block 24 is supplied with compressed air from the compressed air source 100a, whereby the control valve 88 of the input piston 68 occupies its release configuration.
  • a certain color is now conveyed by the color changing unit 124 in the input channel 44 of the input block 24, which then flows through the passage flow channel 76 of the input piston 68 and exits at the free end face 80 of the piston body 74.
  • lacquer is dotted and illustrates the flow direction of the paint by an arrow with a solid line.
  • the flow of compressed air is indicated by an arrow with three circles.
  • the control valve 88 of the output sump 70 in its blocking configuration now prevents paint from flowing through its passage flow passage 76, and therefore the output piston 70 is pushed away from the input piston 68 by the paint.
  • a working space 138 is formed in the FIGS. 3 to 5 can be seen and its volume depends on the amount of medium contained therein. The working space 138 is thus formed at least temporarily.
  • the amount of paint required for a vehicle body roof to be painted in its own color may be less than the amount of paint of a different color required for the side area of a vehicle body.
  • FIG. 4 Also illustrates, via the color changing unit 124 from the compressed air source 130 compressed air to the input port 46 of the input block 24 given.
  • the compressed air which acts as a thrust medium
  • the entire conveyor assembly 142 pushed in the direction of the output block 28 until the coupling portion 72 of the output piston 70 dips into the coupling recess 34 of the output block 28 and the output piston 70 assumes its dispensing position in which the output piston 70 is locked by the locking device 102 b.
  • the piston assembly 62 can thus be moved in the interior 30 as a movement unit between a first position in which the input piston 68 assumes its filling position, and a second position in which the output piston 70 assumes its dispensing position.
  • an insulation space 144 is formed, which is filled with an electrically insulating insulation medium, which in the present case is provided by compressed air. This shows FIG. 5 ,
  • the application device 12 to be operated with high voltage and for high voltage to be applied to the output side 26 of the piston dosing device 16 without the danger of a voltage flashover in the direction of the color change unit 124.
  • FIG. 7 illustrates how then a thrust medium, for example, compressed air from the compressed air source 120, via the valve means 110 on the line 108 and in this way on the output terminal 56 at the output block 28 is given.
  • the locking device 102b releases the output piston 70, whereupon it moves together with the input piston 68 in the direction of the input block 24 until again in the FIGS. 1 and 2 Filling basic configuration of the piston dispenser 16 is reached.
  • a second insulation space 146 is thereby formed, which with an isolation medium is filled, which in the present case is given by the compressed air.
  • paint from the second piston dispenser 18 can be dispensed in parallel and high voltage applied to the application device 12.
  • the second piston dispenser 18 was filled with a paint for this purpose in the manner explained above, while the paint from the piston dispenser 16 was applied.
  • FIGS. 8 and 9 illustrate briefly the operating situations according to the FIGS. 6 and 7 with the difference that a larger amount of paint 140 was pressed into the working space 138, as required for the actual application process to carry a kind of security volume.
  • the assembly of input piston 68, output piston 70 and paint 140 is moved together to the input block 24 after the application process. Then, first the control valve 88 is brought in the input piston 68 in its release configuration and the paint 140 is pressed via the line 122 and the color change unit 124 back into the associated ring line 126 by compressed air against the output side 26 of the piston dispenser 16 forth against the output piston 70 is pressed ,
  • FIGS. 10 and 11 illustrate a piston dispenser 16 according to a second embodiment, in which the above-described components carry the same reference numerals.
  • the input piston member 64 is not a floatingly mounted input piston 68, but an input piston 150 coupled to a piston rod 148.
  • the piston rod 148 is made of an electrically insulating material and extends through a guide passage 152 in the input block 24 It can be moved to the outside and can be moved by means of a provided outside the cylinder unit 20 piston drive 154, as is in itself known and therefore not further explained.
  • the piston rod 148 is coaxial with the input piston 150, correspondingly the input port 44 and the input port 46 of the input block 24 are arranged eccentrically, including the position of the connection port 82 and the course of the passage block. Flow channel 76 of the input piston 68 are adjusted.
  • FIGS. 12 and 13 show again a modification of the piston dispenser 16 with piston rod 148.
  • the input channel 44 with input port 46 and the control line 48 with control port 50 are not provided in an input block 24, but in an input section 156 of the cylinder unit 20 on the input side 42 of the piston meter 16.
  • the connection opening 82 and the passage of the passage flow channel 76 of the input piston 68 are adapted accordingly, wherein the connection opening 82 is formed as a radially circumferential connection groove 158 so that the fluid connection of the lines can be achieved independently of the rotational position of the input piston 150.
  • FIGS. 12 and 13 it may be necessary to dispense with a coupling portion 72 in the input piston 68.
  • the locking device 102 a, in the FIGS. 12 and 13 is not shown specifically, then at least according to radially arranged on the hollow cylinder 20a.

Landscapes

  • Coating Apparatus (AREA)
  • Reciprocating Pumps (AREA)

Claims (11)

  1. Dispositif de dosage à piston pour des produits fluides, en particulier pour l'alimentation d'un organe applicateur (12) à fonctionnement électrostatique dans une installation pour l'enduction d'objets, avec
    a) une unité de cylindre (20) avec un espace intérieur (30) dans lequel peut être formée au moins par moments une chambre de travail (138) ;
    b) un ensemble de piston (62), qui peut être déplacé dans l'espace intérieur (30) ;
    sachant que
    c) l'unité de cylindre (20) présente un branchement d'entrée (46), par l'intermédiaire duquel du produit fluide peut être apporté à la chambre de travail (138), et un branchement de sortie (56), par l'intermédiaire duquel du produit fluide peut être délivré à partir de la chambre de travail (138),
    caractérisé en ce que
    d) l'ensemble de piston (62) comprend un élément de piston (64) d'entrée et un élément de piston (66) de sortie, entre lesquels la chambre de travail (138) peut être formée ;
    e) l'élément de piston (64) d'entrée comprend un canal d'écoulement traversant (76) et peut être déplacé dans une position de remplissage dans laquelle le canal d'écoulement traversant (76) est fluidiquement relié au branchement d'entrée (46), de sorte que du produit fluide peut être transporté entre l'élément de piston (64) d'entrée et l'élément de piston (66) de sortie, formant ainsi la chambre de travail (138) ;
    f) l'élément de piston (66) de sortie comprend un canal d'écoulement traversant (76) et peut être déplacé dans une position de délivrance dans laquelle le canal d'écoulement traversant (76) est fluidiquement relié au branchement de sortie (56).
  2. Dispositif de dosage à piston selon la revendication 1, caractérisé en ce que l'ensemble de piston (62) peut, en tant qu'unité mobile, être déplacé dans l'espace intérieur (30) entre une première position, dans laquelle l'élément de piston (64) d'entrée prend sa position de remplissage, et une deuxième position, dans laquelle l'élément de piston (66) de sortie prend sa position de délivrance.
  3. Dispositif de dosage à piston selon la revendication 1 ou 2, caractérisé en ce qu'une chambre d'isolation (144), qui est remplie d'un produit d'isolation électriquement isolant, peut être formée entre le branchement d'entrée (46) et l'élément de piston (64) d'entrée dans l'espace intérieur (30).
  4. Dispositif de dosage à piston selon l'une des revendications 1 à 3, caractérisé en ce que l'élément de piston (64) d'entrée comprend une partie d'accouplement (72) qui est réalisée complémentaire d'un renfoncement d'accouplement (32) sur un côté d'entrée (22) du dispositif (16, 18) de dosage à piston, et/ou l'élément de piston (66) de sortie comprend une partie d'accouplement (72) qui est réalisée complémentaire d'un renfoncement d'accouplement (34) sur un côté de sortie (26) du dispositif (16, 18) de dosage à piston.
  5. Dispositif de dosage à piston selon l'une des revendications 1 à 4, caractérisé en ce que le branchement d'entrée (46) est formé sur un bloc d'entrée (24) sur un côté d'entrée (22) du dispositif (16, 18) de dosage à piston, et/ou le branchement de sortie (56) est formé sur un bloc de sortie (28) sur un côté de sortie (26) du dispositif (16, 18) de dosage à piston.
  6. Dispositif de dosage à piston selon l'une des revendications 1 à 4, caractérisé en ce que le branchement d'entrée (46) est formé sur une partie d'entrée (156) de l'unité de cylindre (20).
  7. Dispositif de dosage à piston selon l'une des revendications 1 à 6, caractérisé en ce que l'élément de piston (64) d'entrée et/ou l'élément de piston (66) de sortie sont montés en montage flottant.
  8. Dispositif de dosage à piston selon l'une des revendications 1 à 7, caractérisé en ce que l'élément de piston (64) d'entrée est accouplé à une tige de piston (148) qui peut être déplacée au moyen d'un entraînement de piston (154) prévu en dehors de l'unité de cylindre (20).
  9. Dispositif de dosage à piston selon l'une des revendications 1 à 8, caractérisé en ce qu'il est prévu au moins un organe de blocage (102a, 102b) au moyen duquel l'élément de piston (64) d'entrée peut être bloqué dans sa position de remplissage et/ou l'élément de piston (66) de sortie peut être bloqué dans sa position de délivrance, au moins dans la direction de l'axe longitudinal (40) du dispositif (16, 18) de dosage à piston.
  10. Système pour l'enduction d'objets, avec un organe applicateur (12) qui est relié à au moins un dispositif (16, 18) de dosage à piston, caractérisé en ce que le dispositif (16, 18) de dosage à piston est un dispositif (16, 18) de dosage à piston selon l'une des revendications 1 à 9.
  11. Système selon la revendication 10, caractérisé en ce que l'organe applicateur (12) est à fonctionnement électrostatique.
EP14003631.0A 2014-10-25 2014-10-25 Dispositif de dosage à piston pour milieux liquides pour l'enduction d'objets Not-in-force EP3012028B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14003631.0A EP3012028B1 (fr) 2014-10-25 2014-10-25 Dispositif de dosage à piston pour milieux liquides pour l'enduction d'objets

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14003631.0A EP3012028B1 (fr) 2014-10-25 2014-10-25 Dispositif de dosage à piston pour milieux liquides pour l'enduction d'objets

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EP3012028A1 EP3012028A1 (fr) 2016-04-27
EP3012028B1 true EP3012028B1 (fr) 2017-04-12

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DE112019002283T5 (de) 2018-05-03 2021-02-04 Fanuc America Corporation Robotergesteuerte vorrichtung für eine kompakte lackierkabine

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US8322301B2 (en) * 2007-01-12 2012-12-04 Honda Motor Co., Ltd. Electrostatic coating device
DE102009031463A1 (de) * 2009-07-01 2011-01-05 Eisenmann Anlagenbau Gmbh & Co. Kg Kolbendosierer für fluide Medien und System zum Beschichten von Gegenständen
CN102861702B (zh) * 2011-07-05 2015-11-25 本田技研工业株式会社 涂料供给系统及涂料供给方法

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