EP0089043A2 - Procédé et appareil pour le revêtement électrostatique des objets par des fluides - Google Patents

Procédé et appareil pour le revêtement électrostatique des objets par des fluides Download PDF

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Publication number
EP0089043A2
EP0089043A2 EP83102488A EP83102488A EP0089043A2 EP 0089043 A2 EP0089043 A2 EP 0089043A2 EP 83102488 A EP83102488 A EP 83102488A EP 83102488 A EP83102488 A EP 83102488A EP 0089043 A2 EP0089043 A2 EP 0089043A2
Authority
EP
European Patent Office
Prior art keywords
bell
liquid
spray
speed
paint
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.)
Withdrawn
Application number
EP83102488A
Other languages
German (de)
English (en)
Other versions
EP0089043A3 (fr
Inventor
Roland Andreas Dipl.-Ing. Meisner
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.)
BASF Farben und Fasern AG
Original Assignee
BASF Farben und Fasern AG
BASF Lacke und Farben AG
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 BASF Farben und Fasern AG, BASF Lacke und Farben AG filed Critical BASF Farben und Fasern AG
Priority to EP83102488A priority Critical patent/EP0089043A3/fr
Publication of EP0089043A2 publication Critical patent/EP0089043A2/fr
Publication of EP0089043A3 publication Critical patent/EP0089043A3/fr
Withdrawn legal-status Critical Current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
    • 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 device for electrostatically coating objects with liquids, e.g. liquid color, according to the preamble of the main claim. Furthermore, the invention relates to a method using the device.
  • liquids e.g. liquid color
  • Spray systems are also known in which the paint is electrostatically drawn off as a thin film from a knife-like edge.
  • the paint is fed to the spray edge by gravity or centrifugal force.
  • the invention has for its object to provide a device with which a liquid, e.g. liquid paint, can be sprayed onto an object to be processed, whereby, in contrast to the previously known devices, difficult coating materials, such as "MetaLLic lacquers", can be processed and a uniform fine distribution of the color is ensured without fear must have air pockets.
  • a liquid e.g. liquid paint
  • difficult coating materials such as "MetaLLic lacquers”
  • the invention further proposes a method that can be carried out using the device and is defined in the characterizing part of claim 5.
  • a device consists in a bell, which is seated on a hollow axis and is driven by an external rotor drive.
  • the hollow axis itself serves as a lacquer channel, which widens like a diffuser at the transition point to the inside of the bell, before the fluid then passes through a rectifier sieve at its end.
  • the liquid is then transferred radially and rotationally symmetrically to the moving inner surface of the bell, which is grooved for positive transport. This radial toothing contributes to the transmission of the Coriolis force.
  • nozzle holes are made on one or more sub-circles, one of which is preferably larger than the diameter of the atomizing edge.
  • the pitch circle diameter and the bore geometry are selected in relation to the air flow rate so that the air balance around the rotating bell is ensured and the sprayed paint mist cone receives a defined axial thrust through the circular air curtain.
  • the fluid stream supplied centrally to the bell which rotates at a speed of preferably 15,000 to 60,000 rpm, is fed through the torus vortex formed in the free half space without detaching the moving bell inner surface and there, in a manner known per se, via frictional engagement or positive engagement of the spray edge is fed.
  • the fluid flow is almost decelerated to zero speed by means of a diffuser and a rectifier sieve.
  • the position of the swirl axis is not subject to any restrictions in wide operating areas.
  • FIG. 1 has the hollow shaft 1, which supports the bearings 10 and 10 'of the bell 2 with the rotor 5, the stator 11 and the dynamic seal 20 and the fabric bushing 16.
  • the electrical supply line 8 for the stator is guided in a groove 17 on the hollow shaft through the bearing 10 '.
  • the hollow shaft ends in a diffuser 12, which is closed by a rectifying sieve 14.
  • the inlet of the diffuser is designed as a valve seat 3, on which the fluid flow can be shut off using the valve needle 4.
  • the bell inner contour carries a radial toothing 15 for the transmission of the Coriolis force.
  • the additional nozzle bores 9 of the nozzle ring 6 produce an annular air curtain which imparts an axial thrust to the paint mist sprayed on the edge 13.
  • the paint to be sprayed is introduced via line 7.
  • a pneumatic drive with a turbine rotor 18 and nozzle ring 19 is provided instead of the electric drive.
EP83102488A 1981-01-28 1981-01-28 Procédé et appareil pour le revêtement électrostatique des objets par des fluides Withdrawn EP0089043A3 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP83102488A EP0089043A3 (fr) 1981-01-28 1981-01-28 Procédé et appareil pour le revêtement électrostatique des objets par des fluides

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP83102488A EP0089043A3 (fr) 1981-01-28 1981-01-28 Procédé et appareil pour le revêtement électrostatique des objets par des fluides

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP81100609A Division EP0034278B1 (fr) 1980-02-15 1981-01-28 Procédé et appareil pour le revêtement électrostatique d'objets à l'aide d'un fluide
EP81100609.7 Division 1981-01-28

Publications (2)

Publication Number Publication Date
EP0089043A2 true EP0089043A2 (fr) 1983-09-21
EP0089043A3 EP0089043A3 (fr) 1984-01-11

Family

ID=8190343

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83102488A Withdrawn EP0089043A3 (fr) 1981-01-28 1981-01-28 Procédé et appareil pour le revêtement électrostatique des objets par des fluides

Country Status (1)

Country Link
EP (1) EP0089043A3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2282084A (en) * 1993-09-23 1995-03-29 Remtox Chemicals Limited Liquid Injector

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2850322A (en) * 1956-05-31 1958-09-02 Rheem Mfg Co Centrifugal spray head
US2893894A (en) * 1958-11-03 1959-07-07 Ransburg Electro Coating Corp Method and apparatus for electrostatically coating
DE1148167B (de) * 1954-05-24 1963-05-02 Harper J Ransburg Co Rotationszerstaeuber zum elektrostatischen Auftragen von Farbe od. dgl. Fluessigkeiten
DE1933147A1 (de) * 1969-06-30 1971-01-21 Mueller Ernst Kg Farbspritzpistole fuer das elektrostatische Farbspritzen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1148167B (de) * 1954-05-24 1963-05-02 Harper J Ransburg Co Rotationszerstaeuber zum elektrostatischen Auftragen von Farbe od. dgl. Fluessigkeiten
US2850322A (en) * 1956-05-31 1958-09-02 Rheem Mfg Co Centrifugal spray head
US2893894A (en) * 1958-11-03 1959-07-07 Ransburg Electro Coating Corp Method and apparatus for electrostatically coating
DE1933147A1 (de) * 1969-06-30 1971-01-21 Mueller Ernst Kg Farbspritzpistole fuer das elektrostatische Farbspritzen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2282084A (en) * 1993-09-23 1995-03-29 Remtox Chemicals Limited Liquid Injector

Also Published As

Publication number Publication date
EP0089043A3 (fr) 1984-01-11

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Inventor name: MEISNER, ROLAND ANDREAS, DIPL.-ING.