EP0827781B1 - Pulvérisateur rotatif - Google Patents

Pulvérisateur rotatif Download PDF

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Publication number
EP0827781B1
EP0827781B1 EP97115078A EP97115078A EP0827781B1 EP 0827781 B1 EP0827781 B1 EP 0827781B1 EP 97115078 A EP97115078 A EP 97115078A EP 97115078 A EP97115078 A EP 97115078A EP 0827781 B1 EP0827781 B1 EP 0827781B1
Authority
EP
European Patent Office
Prior art keywords
bell
annular groove
cleaning fluid
spray
rotary sprayer
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
EP97115078A
Other languages
German (de)
English (en)
Other versions
EP0827781A3 (fr
EP0827781A2 (fr
Inventor
Ralph Rothenbacher
Bettina Zitzelsberger
Steffen Georgi
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.)
ABB Patent GmbH
Original Assignee
ABB Patent GmbH
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 ABB Patent GmbH filed Critical ABB Patent GmbH
Publication of EP0827781A2 publication Critical patent/EP0827781A2/fr
Publication of EP0827781A3 publication Critical patent/EP0827781A3/fr
Application granted granted Critical
Publication of EP0827781B1 publication Critical patent/EP0827781B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • B05B3/1064—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 the liquid or other fluent material to be sprayed being axially supplied to the rotating member through a hollow rotating shaft
    • 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
    • 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
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
    • B05B5/0403—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces characterised by the rotating member
    • B05B5/0407—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces characterised by the rotating member with a spraying edge, e.g. like a cup or a bell
    • 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
    • B05B3/1092—Means for supplying shaping gas
    • 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
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
    • B05B5/0426—Means for supplying shaping gas

Definitions

  • the invention relates to a rotary atomizer for the application of paints by means of electrostatic internal or external charging with a spray bell with a front tear-off edge, with one arranged in a motor housing Drive motor, which housing supply lines for the supply of paint, Cleaning fluid and compressed air and at least one high-voltage connection receives, and with at least one intended for axial spraying spray nozzle for cleaning fluid, the the bell-side end of the housing is arranged according to the preamble of claim 1.
  • a flushing device for cleaning the bell outer surface is in the DE 195 17 477 A1 has been proposed, which for a spray nozzle Cleaning provided cleaning fluid, preferably solvent, immediately is sprayed onto the outer surface of the bell.
  • cleaning fluid preferably solvent
  • a similar spray device for cleaning a bell atomizer is from the US5106025 become known.
  • the cleaning fluid also becomes immediate sprayed onto the outer surface of the bell.
  • the splash losses due to the ricochet part of the solvent from the outer surface of the bell is removed by a convex bell outer surface and minimized by a certain spray angle.
  • the radial position of the at least one spray nozzle is according to the invention a slot opening in the rear facing the housing facing the Spray bell molded annular groove opposite, the at least a spray nozzle cooperates with the annular groove, via which annular groove the cleaning fluid reaches the outer surface of the bell and contaminants located there detaches and eliminates, and wherein the annular groove with at least a radial recess is provided, through which the cleaning fluid introduced into the annular groove reaches the outer surface of the bell.
  • the sprayed cleaning fluid in the prior art only partially reaches the surface of the spray bell to be cleaned or spread over it as a film, while the rest is reflected and is not available for cleaning, forms the applied according to the invention Cleaning fluid a covering the entire outer surface of the spray bell Film that removes adhering paint residues due to its reactive properties rinsed off the outer surface of the bell.
  • the annular groove via at least one on the groove base arranged radial bore with the bell outer surface in terms of flow connected, with six designed as bores or as slots radial or also the involute-like or following the direction of rotation of the bell tangential through openings the best effect is achieved.
  • the annular groove is parallel to the outer wall of the bell molded into the back of the bell, the annular groove advantageously being conical Has groove flanks.
  • annular groove at an angle between 10 ° and 30 °, preferably 20 °, inclined in relation to the central axis of the spray bell the back of the bell is molded.
  • the spray nozzle for the cleaning fluid at a short distance from Spray bell arranged.
  • the distance between the spray nozzle is preferably for the cleaning fluid and the back of the spray bell at most 2 mm.
  • Fig. 1 is a rotary atomizer 10 with a drive 12 and with a front Spray bell 14 and arranged concentrically around the drive 12 High-voltage electrodes 16 and one feeding the high-voltage electrodes 16 High voltage connection line 18 shown.
  • the high voltage electrodes 16 are fastened radially to a housing 20 which has a drive 12 forming engine, preferably compressed air turbine engine.
  • a shaft 22 for driving the spray bell 14 is brought out and a spray nozzle 24 for supplying the spray bell 14 with cleaning fluid.
  • annular groove 26 is formed parallel to the outer surface 28 of the spray bell 14, at the bottom of the groove there are recesses 30 which provide a flow connection form to the outer surface 28.
  • the spray nozzle 24 and the annular groove 26 with the recesses 30 form the cleaning device according to the invention for the removal of impurities and color residues on the surface 28 of the spray bell 14.
  • the relevant spray bell 14 is cleaned. Both the inner colorant paths and the front end face cleaned as well as the outer surface of the spray bell 14, on which Colorant residues and other impurities can accumulate.
  • cleaning fluid for example solvent
  • the spray nozzle 24 possibly enriched with compressed air, supplied and arrives due to the strict geometric assignment of the ring channel 26 to the radial position of the Spray nozzle 24 without loss into the annular groove 26, from where the cleaning fluid due to centrifugal force flows to the base of the groove radially further outside and through the The recesses 30 provided there reach the lateral surface 28.
  • the recesses 30 can be radial bores or slots. You can but also involute-like, i.e. following an involute, or tangential in each case according to the direction of rotation through the existing outer wall his.
  • the cleaning fluid spreads evenly over the circumferential surface and thereby the on the The surface of any accumulated impurities first dissolves and then peels off and due to the centrifugal flow leads to one at the Front end of the spray bell located tear-off edge 29, on which in the paint spraying operation the relevant colorant and in the so-called rinsing mode the relevant Detergent or cleaning fluid is thrown off.

Claims (11)

  1. Pulvérisateur rotatif pour l'application de peintures à l'aide d'une charge électrique interne ou externe, avec une cloche de pulvérisation (14) comportant un bord de décollement (29) frontal, un moteur d'entraínement disposé à l'intérieur d'un carter (20) dans lequel sont logées des conduites d'alimentation en peinture, en fluide de nettoyage et en air comprimé ainsi qu'une liaison à haute tension, et avec au moins une buse de pulvérisation (24) de fluide de nettoyage prévue pour la pulvérisation dans la direction axiale, qui est disposée sur la face frontale côté cloche du carter (20), caractérisé en ce que la position radiale de la buse de pulvérisation (24), au nombre d'au moins une, est située en regard d'une gorge annulaire (26) aménagée dans la face frontale arrière de la cloche de pulvérisation (14) tournée vers le carter (20), la buse de pulvérisation (24), au nombre d'au moins une, coopérant avec la gorge annulaire (26), par l'intermédiaire de laquelle (26) le fluide de nettoyage est amené jusqu'à la surface extérieure de la cloche (28) et décolle et élimine les impuretés présentes, et en ce que la gorge annulaire (26) est pourvue d'au moins une échancrure (30) radiale par laquelle le fluide de nettoyage envoyé dans la gorge annulaire (26) arrive jusqu'à la surface extérieure (28) de la cloche.
  2. Pulvérisateur rotatif selon la revendication 1, caractérisé en ce que la gorge annulaire (26) communique avec la surface extérieure (28) de la cloche par l'intermédiaire d'au moins un trou radial (30) aménagé dans le fond de la gorge.
  3. Pulvérisateur rotatif selon la revendication 1 ou 2, caractérisé en ce que six échancrures (30) radiales, réalisées sous la forme de trous ou de fentes, relient sur le plan de l'écoulement le canal annulaire (26) à la surface extérieure (28) de la cloche.
  4. Pulvérisateur rotatif selon une des revendications précédentes, caractérisé en ce que la gorge annulaire (26) est aménagée dans la face arrière de la cloche, parallèlement à la surface extérieure (28) de la cloche.
  5. Pulvérisateur rotatif selon une des revendications précédentes, caractérisé en ce que la distance entre la buse de pulvérisation (24) pour le fluide de nettoyage et la face arrière de la cloche de pulvérisation (14) est de 2 mm maximum.
  6. Pulvérisateur rotatif selon une des revendications 1 à 4, caractérisé en ce que la buse de pulvérisation (24) pour le fluide de nettoyage pénètre dans la gorge annulaire (26).
  7. Pulvérisateur rotatif selon une des revendications précédentes, caractérisé en ce que le volume de fluide de nettoyage qui sort de la buse de pulvérisation (24) s'écoule en totalité dans la gorge annulaire (26).
  8. Pulvérisateur rotatif selon une des revendications précédentes, caractérisé en ce que le fluide de nettoyage en provenance de la gorge annulaire (26) qui parvient à l'extérieur par l'échancrure (30) radiale s'étend sous forme de film sur la surface extérieure (28) de la cloche.
  9. Pulvérisateur rotatif selon une des revendications précédentes, caractérisé en ce que le fluide de nettoyage présent sur la surface extérieure (28) de la cloche avec les impuretés entraínées s'écoule jusqu'au bord de décollement (29) et est chassé de la cloche de pulvérisation (14) par la force centrifuge.
  10. Pulvérisateur rotatif selon une des revendications précédentes, caractérisé en ce que la gorge annulaire (26) présente des flancs de gorge coniques.
  11. Pulvérisateur rotatif selon une des revendications précédentes, caractérisé en ce que la gorge annulaire (26) est aménagée dans la face arrière de la cloche, avec un angle d'inclinaison compris entre 10° et 20°, de préférence de 20°, par rapport à l'axe médian de la cloche de pulvérisation (14).
EP97115078A 1996-09-06 1997-09-01 Pulvérisateur rotatif Expired - Lifetime EP0827781B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19636159 1996-09-06
DE19636159A DE19636159A1 (de) 1996-09-06 1996-09-06 Rotationszerstäuber

Publications (3)

Publication Number Publication Date
EP0827781A2 EP0827781A2 (fr) 1998-03-11
EP0827781A3 EP0827781A3 (fr) 1998-09-16
EP0827781B1 true EP0827781B1 (fr) 2002-11-06

Family

ID=7804779

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97115078A Expired - Lifetime EP0827781B1 (fr) 1996-09-06 1997-09-01 Pulvérisateur rotatif

Country Status (2)

Country Link
EP (1) EP0827781B1 (fr)
DE (2) DE19636159A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10101372A1 (de) 2001-01-13 2002-08-01 Itw Oberflaechentechnik Gmbh Sprühverfahren und Sprühvorrichtung für Beschichtungsflüssigkeit
DE10101369A1 (de) 2001-01-13 2002-07-18 Itw Oberflaechentechnik Gmbh Sprühverfahren und Sprühvorrichtung für Beschichtungsflüssigkeit
DE10101367A1 (de) * 2001-01-13 2002-08-01 Itw Oberflaechentechnik Gmbh Sprühverfahren und Sprühvorrichtung für Beschichtungsflüssigkeit
JP3968020B2 (ja) 2001-02-24 2007-08-29 マルクアルト ゲーエムベーハー 回転角調整装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8607841U1 (de) * 1986-03-21 1986-05-15 Behr-Industrieanlagen GmbH & Co, 7121 Ingersheim Vorrichtung zum Vernebeln flüssiger Farbe, insbesondere Lackzerstäuber
DE3912700C1 (en) * 1989-04-18 1990-10-11 Ransburg-Gema Gmbh, 6056 Heusenstamm, De Rotary spray coater - has atomiser ring with solvent channels, and includes annular air inlets
FR2652518B1 (fr) * 1989-10-03 1994-04-08 Sames Sa Dispositif de projection de produit de revetement a organe rotatif de pulverisation.
DE4201379A1 (de) * 1992-01-20 1993-07-22 Baral Karl Heinz Reinigungseinrichtung zur reinigung von duesenbohrungen
DE9419641U1 (de) * 1994-12-07 1995-02-02 Duerr Gmbh & Co Rotationszerstäuber mit einem Glockenkörper
DE19506968A1 (de) * 1995-02-13 1996-08-14 Ind Lackieranlagen Schmidt Gmb Hochrotationszerstäuber
DE19517477A1 (de) * 1995-05-12 1996-11-14 Abb Patent Gmbh Rotationszerstaueber

Also Published As

Publication number Publication date
EP0827781A3 (fr) 1998-09-16
DE19636159A1 (de) 1998-03-12
DE59708656D1 (de) 2002-12-12
EP0827781A2 (fr) 1998-03-11

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