EP1072318B1 - Tête pour dispositif de pulvérisation électrostatique rotatif - Google Patents

Tête pour dispositif de pulvérisation électrostatique rotatif Download PDF

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Publication number
EP1072318B1
EP1072318B1 EP00114620A EP00114620A EP1072318B1 EP 1072318 B1 EP1072318 B1 EP 1072318B1 EP 00114620 A EP00114620 A EP 00114620A EP 00114620 A EP00114620 A EP 00114620A EP 1072318 B1 EP1072318 B1 EP 1072318B1
Authority
EP
European Patent Office
Prior art keywords
discs
spray head
nozzle
head according
atomizer
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
EP00114620A
Other languages
German (de)
English (en)
Other versions
EP1072318A1 (fr
Inventor
Winfried Ott
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.)
Lactec GmbH GesellschaftfFuer Moderne Lackiertechnik
Original Assignee
Lactec GmbH GesellschaftfFuer Moderne Lackiertechnik
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 Lactec GmbH GesellschaftfFuer Moderne Lackiertechnik filed Critical Lactec GmbH GesellschaftfFuer Moderne Lackiertechnik
Publication of EP1072318A1 publication Critical patent/EP1072318A1/fr
Application granted granted Critical
Publication of EP1072318B1 publication Critical patent/EP1072318B1/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
    • 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
    • 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
    • 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
    • B05B5/0411—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 individual passages at its periphery
    • 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 spray head for an electrostatic rotary atomizer, the electrostatic charge of the coating agent to be applied works according to the preamble of claim 1.
  • Such Spray head is known from US 3,572,589.
  • the coating agent which is color or Lacquer and the like is inside a driven hollow shaft fed to a stationary nozzle.
  • the coating agent comes from the nozzle on the fast rotating, usually bell-shaped atomizer head and is finally released from its atomizer edge.
  • These features are shown in German utility model 92 17 458 and described. So that radially flung away from the atomizer edge Paint particles must get onto a workpiece to be painted the atomized paint can be moved forward in the axial direction.
  • a steering air flow is usually used. It emerges from one Wreath of holes behind the rotating bell atomizer and then acts on the atomized paint particles in the axial direction.
  • the spray patterns have a diameter of around 500 up to 700 mm. Radial centrifugal forces, also radial, from the rotating atomizer initiated air flows and axially acting steering air flows overlap in such a painting process.
  • the said lead in particular when atomizing metallic paints Framework conditions for a significantly different training of the achieved Metallic effect than when applying metallic varnish with a conventional, air atomizing spray gun.
  • the invention has for its object a spray head to create with the help of which it is possible to create spray patterns with the smallest possible diameter while still having a large amount of paint to generate per unit of time and with comparable atomization quality as in the case of a larger diameter rotary atomizer.
  • the invention provides that the spray head has the features of claim 1.
  • the invention has the result that one for generating a small spray pattern suitable atomizer head despite its small diameter is able to atomize the same amount of paint as before well-known atomizer head with a large diameter. It is essential that Outlet openings with atomizer edges in sufficient numbers on the atomizer head are provided, these outlet openings expediently several atomizer edges arranged one behind the other in the axial direction form.
  • the achievable with such an atomizer head Spray pattern has the desired, small diameter and is nevertheless able to process a large amount of paint per unit of time.
  • metallic effect when processing metallic paints an appearance like when using an air atomizing Spray gun. Also penetration of the atomized and electrostatic charged varnish in forms with the effect of a Faraday Cages can be realized better.
  • FIG. 1 comprises an atomizing head 2, that in a housing 3 in a generally known manner on a shaft 4 is stored.
  • the shaft 4 is a hollow shaft.
  • Located inside there is a feed pipe 5 with holes 6 and 7 for paint or detergent.
  • the holes 6 and 7 lead to a nozzle 8 at the free end of the Feed pipe 5.
  • Fig. 2 is also during the Painting process stationary nozzle 2 inside 9 of the atomizer head Second
  • the drive for the hollow shaft 5 and the supply of the holes 6 and 7 in the feed tube 5 do not differ from known rotary atomizers.
  • the nozzle 8 also serves to guide and dispense the liquid Coating agent or a cleaning agent in principle known way. However, it is useful if the nozzle 8 or their Openings are designed so that there is not a cylindrical spray results, but a fan-shaped beam or a beam in the form of a cone.
  • the atomizer head 2 comprises an outside according to the embodiment cylindrical holding and carrying element 10, which at the same time for attachment serves at the free end 11 of the shaft.
  • the nozzle 8 is then approximately in the middle of the atomizer head 2.
  • a multi-part Atomizer element 12 arranged according to a first embodiment.
  • the atomizer head 2 has several in the area of the atomizer element 12 arranged circumferentially and at an axial distance from one another Outlet openings 13 for the coating agent or for a cleaning agent on. Each of the outlet openings 13 extends over the entire circumference of the atomizer element 12 or the atomizer head 2. According to the embodiment, there are nine on the atomizer head 2 annular outlet openings 13 are provided.
  • Each outlet opening 13 includes two circumferentially extending, circular atomizer edges 14.
  • the atomizer head 2 has twice the number of atomizer edges 14 at an axial distance from each other.
  • a plurality of disks 17 are used to form the atomizer edges 14
  • the disks 17 are ring-shaped.
  • the outside diameter all disks 17 are the same according to the embodiment.
  • center bores 18 arranged in the disks 17 are from disk to Disc graduated in such a way that a disc 19 adjacent to the nozzle 8 a hole with the largest diameter and a cover plate 20th or a disk 21 closest to it has the smallest bore diameter have.
  • the cover plate 20 has a centrally arranged according to the embodiment Exit opening 20 '.
  • This outlet opening 20 ' has one Shape and shape similar to a Laval nozzle. Part of the nozzle 8 liquid supplied to the atomizer element 12 emerges from the central one Exit opening 20 'and passes through the centrifugal force over the exposed End face 20 "to the atomizing edge 14 '
  • All disks 17 and, according to the exemplary embodiment, also the end disk 20 have an annular elevation on their side facing the nozzle 8 or an annular collar 22.
  • the outside diameter of a each annular collar 22 is less than the outside diameter the disc 17.
  • the inner diameter of the collar 22 is larger than that Diameter of the holes 18 in the disks 17. In the assembled Condition are thus slot-shaped grooves 23 on the circumference of the atomizer element 12 and form the outlet openings 13 with the Atomizer edges 14 ..
  • each atomizer edge 14 16 Many radially directed supply channels lead to each atomizer edge 14 16. They have a triangular one in the area of each federal 22 Cross-section on how this is mainly from the illustration in Fig. 2 in the area the central axis 24 emerges.
  • the area of each federal government 22 Feed channels 16 which are triangular in cross section are in the region of the radially outside lying, annular feed surfaces 15 only notches or grooves shallow depth.
  • the outer, annular feed surfaces 15 are therefore according to the embodiment shown in Figures 2, 5 and 6 knurled.
  • the notches belonging to the feed channels 16 run radially on the inside 16 'on the respective end face of the disks 17 and 20 on the nozzle side before reaching the holes 18 gradually.
  • the disks 17 including those arranged on the end face End plate 20 serve fastening means 25, for example, in shape of screws. They pass through holes 26. These holes 26 are expediently in the region of the collar 22 of the disks 17th
  • Fastening the disks 17 to one another or to the holding and supporting element 10 is also due to other fastening techniques such as gluing, Clamps etc. possible.
  • the holding and carrying element 10 is sleeve or ring-shaped. It is cylindrical on the outside according to FIG. 2 and deposited several times inside, so that it is on the free end 11 of the Shaft 4 is attachable.
  • the variety of atomizer edges available 14 or their total length according to the number of disks 17 enables even with a small diameter of the disks 17 high quality processing of large quantities of paint per unit of time.
  • Fig. 3 is a section along the line III - III in Fig. 2, but of one modified atomizer head 2a shown. Basically the same parts have the same reference numbers and index a.
  • the atomizer head 2a differs from the atomizer head 2 only in that the annular, radially outer feed surface 15a between the collar 22a and the atomizing edge 14a of each disc 17a is not knurled. It is a smooth ring surface.
  • Fig. 4 relates to a modified disc 17b, which instead of a smooth feed surface 15a is close to the atomizer edge 14b has dotted feed surface 15b.
  • FIGS. 7 and 8 Further modifications of the discs shown in Figures 2 and 6 17 emerge from FIGS. 7 and 8. So the disc 17c is on the nozzle side provided with an annular cutting edge 27c delimiting the bore 18c. The ring cutting edge 27c radially guides the impinging liquid flow outward onto the adjacent annular surface 28c. Comparable ring areas 28c (FIG. 3) have all disks.
  • a disk 17c can also face one the disc plane 30c angled, the atomizer edge 14c have supporting outer edge 31c.
  • the frustoconical, angled Outer edge 31c directs the liquid flowing radially outward around, reducing their radial acceleration and accelerating tangentially becomes.
  • the feed surface 15c can be smooth or knurled according to FIG. 7 his.
  • Fig. 8 shows a detail of another disk 17d, which is complete or partially domed. Its feed surface 15d can also be smooth or in accordance with Fig. 8 knurled and knurled grooves 32d like the others Have washers.
  • the nozzle 8 at the free end of the feed tube 5 produces a conical Liquid flow or a liquid flow in a fan-shaped Shape. This is shown in FIG. 9.

Claims (9)

  1. Tête de pulvérisation (2) pour un pulvérisateur électrostatique rotatif (1), comprenant une buse (8) pour amener un produit d'enduction, notamment une peinture ou une laque, ainsi que plusieurs disques (17, 20) disposés les uns derrière les autres dans la direction axiale, dont les pourtours forment des arêtes de pulvérisation (14), sachant que les disques (17, 20) comportent chacun un perçage central, caractérisée en ce que les perçages concentriques des disques (17, 20) forment un canal de distribution axial qui fait suite à la buse (8), et en ce que les diamètres des perçages des disques (17, 20) s'échelonnent de manière décroissante depuis le disque (17) situé côté buse jusqu'au disque (20) se trouvant à l'opposé de la buse.
  2. Tête de pulvérisation selon la revendication 1, caractérisée en ce que le perçage le plus étroit dans le disque d'extrémité (20) situé à l'opposé de la buse est réalisé en tant qu'orifice de sortie central (20') sous la forme d'une tuyère de Laval.
  3. Tête de pulvérisation selon la revendication 1 ou 2, caractérisée en ce que les disques (17) présentent sur l'une de leurs faces frontales ou sur les deux un épaulement annulaire (22) pour s'appliquer les uns contre les autres.
  4. Tête de pulvérisation selon l'une des revendications 1 à 3, caractérisée en ce que les disques (17) présentent des surfaces d'alimentation (15, 28) et des canaux d'alimentation (16).
  5. Tête de pulvérisation selon l'une des revendications 1 à 4, caractérisée en ce qu'au niveau de l'arête de pulvérisation (14c), les disques (17c) sont coudés de manière à former un tronc de cône.
  6. Tête de pulvérisation selon l'une des revendications 1 à 5, caractérisée en ce que les disques (17d) sont au moins en partie courbés.
  7. Tête de pulvérisation selon l'une des revendications 1 à 6, caractérisée en ce que les disques (17c) présentent côté buse un tranchant annulaire (27c) délimitant le perçage (18c).
  8. Tête de pulvérisation selon l'une des revendications 1 à 7, caractérisée en ce que les disques (17) présentent des encoches sur leur face frontale.
  9. Tête de pulvérisation selon l'une des revendications 1 à 8, caractérisée en ce que le nombre de disques (17) peut varier.
EP00114620A 1999-07-27 2000-07-07 Tête pour dispositif de pulvérisation électrostatique rotatif Expired - Lifetime EP1072318B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19935253 1999-07-27
DE19935253A DE19935253A1 (de) 1999-07-27 1999-07-27 Elektrostatischer Rotationszerstäuber

Publications (2)

Publication Number Publication Date
EP1072318A1 EP1072318A1 (fr) 2001-01-31
EP1072318B1 true EP1072318B1 (fr) 2003-04-09

Family

ID=7916219

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00114620A Expired - Lifetime EP1072318B1 (fr) 1999-07-27 2000-07-07 Tête pour dispositif de pulvérisation électrostatique rotatif

Country Status (4)

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EP (1) EP1072318B1 (fr)
JP (1) JP2001046927A (fr)
AT (1) ATE236727T1 (fr)
DE (2) DE19935253A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10115087A1 (de) * 2001-03-27 2002-10-17 Krones Ag Verfahren und Vorrichtung zum Beschichten eines Kunststoffbehälters
KR100781755B1 (ko) * 2007-06-27 2007-12-04 녹원종합기술 주식회사 로타리 오토마이저의 분사 디스크 회전장치
KR100781754B1 (ko) 2007-06-27 2007-12-04 녹원종합기술 주식회사 로타리 오토마이저의 분사 디스크 회전장치
KR100786719B1 (ko) 2007-06-27 2007-12-21 녹원종합기술 주식회사 로타리 오토마이저의 분사 디스크 회전장치
DE102007047411B4 (de) * 2007-10-04 2017-11-16 Peter Walzel Vorrichtung zum Aufteilen von Flüssigkeiten in Rotationszerstäubern
JP2022176571A (ja) * 2021-05-17 2022-11-30 本田技研工業株式会社 回転霧化式塗装装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1015360B (de) * 1953-04-16 1957-09-05 Heinrich Boedicker Dipl Ing Mit niedrig gespannter Druckluft arbeitende, einen Waermeaustauscher enthaltende Farbspritzpistole, bei der der zu verspritzende Stoff einer feststehenden Duese ueber die Innenflaeche eines rotierenden Hohlkegels zugefuehrt wird
US2993468A (en) * 1957-07-22 1961-07-25 Vilbiss Co Apparatus for coating with atomized liquid
FR1335550A (fr) * 1962-07-02 1963-08-23 Appareil pour pulvériser des liquides à l'aide de la force centrifuge
DE1400722A1 (de) * 1962-12-18 1969-07-03 Hege Dr Ing Hermann Verfahren und Vorrichtung zur Zerstaeubung von Fluessigkeiten mittels rotierender Zerstaeuberkanten
LU49795A1 (fr) * 1965-11-08 1966-01-08
US3572589A (en) * 1968-07-31 1971-03-30 Edward O Norris Electrostatically driven distributor
GB1486427A (en) * 1974-03-27 1977-09-21 Ciba Geigy Ag Rotary atomiser
WO1992020225A1 (fr) * 1991-05-24 1992-11-26 Mat S.A. Rotor de micro-pulverisation centrifuge
DE4308842A1 (de) * 1993-03-19 1994-09-22 Peter Prof Dr Walzel Verfahren und Vorrichtung zum Zerstäuben von Flüssigkeiten

Also Published As

Publication number Publication date
DE50001683D1 (de) 2003-05-15
ATE236727T1 (de) 2003-04-15
DE19935253A1 (de) 2001-02-15
JP2001046927A (ja) 2001-02-20
EP1072318A1 (fr) 2001-01-31

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