EP1481733A2 - Cloche de pulvérisateur rotatif - Google Patents
Cloche de pulvérisateur rotatif Download PDFInfo
- Publication number
- EP1481733A2 EP1481733A2 EP04012245A EP04012245A EP1481733A2 EP 1481733 A2 EP1481733 A2 EP 1481733A2 EP 04012245 A EP04012245 A EP 04012245A EP 04012245 A EP04012245 A EP 04012245A EP 1481733 A2 EP1481733 A2 EP 1481733A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- channel
- electrode
- bell
- coating agent
- bell plate
- 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.)
- Granted
Links
Images
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
- 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 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
- 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
- B05B5/0418—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces designed for spraying particulate material
Definitions
- the invention relates to a coating device for coating of materials with a coating agent, especially in the form of a bell cup or a rotary atomizer, according to the preamble of claim 1.
- a rotary atomizer with a Bells known, used in a paint shop is to paint, for example, automotive body parts.
- the bell cup is here on a hollow shaft rotatably supported by the rotary atomizer and is of a Turbine to a speed of about 5000 to 15000 revolutions brought per minute.
- the hollow shaft of the rotary atomizer in this case forms a coating agent channel, through the coating agent is supplied, wherein the hollow shaft in the bell plate in a conically expanding Splitting channel opens.
- the coating agent in the gap channel of the bell cup due to Centrifugal forces thrown outwards and at one Sprayed edge of the bell cup sprayed.
- the boundary surfaces of the gap channel in the bell cup consist partly of electrically conductive material and stand in the paint shop under high voltage, so that the through the split channel guided coating agent is charged to the best possible order efficiency to reach.
- the bell plate described above indicates its front side an axially projecting front electrode on, in the range of the votes of the bell plate Spray cloud and in the air space in front of the bell plate a space charge zone generated to further improve the order efficiency.
- the electrical contacting of this front electrode takes place here by electrically conductive bolts that are parallel to the axis of rotation of the bell cup through the gap channel run and electrically connected to the hollow shaft of the rotary atomizer connected is.
- These bolts also have the task of indoor and Mechanically connect the outer part of the bell cup with each other, so the bolts have a relatively large cross-section exhibit.
- a disadvantage of the known rotary atomizer described above with a bell plate is the still unsatisfactory Order efficiency, depending on the system parameters and the paint used about 65 - 80%.
- the unsatisfied order efficiency requires In paint shops elaborate recycling measures to the excess Coating agent (overspray) re-paint cycle supply.
- a bell cup having a plurality of needle-shaped security electrodes.
- These Safety electrodes are designed to prevent the discharge energy in electrical discharges of the under high voltage standing bell plate to grounded objects a predetermined exceeds the safety-related maximum value.
- the security electrodes are needle-shaped and with their point facing the grounded objects, so that over the security electrodes a corona discharge with a relatively low discharge energy, before the energy stored capacitively in the bell cup can exceed the maximum value of the discharge energy.
- the Safety electrodes thus do not serve for charging of the coating agent, so that this known bell cup also an unsatisfactory order efficiency having.
- the invention is therefore based on the object, in the known rotary atomizer described above with a bell cup to increase the order efficiency, wherein the order efficiency increased as far as possible It should be that no costly recycling measures anymore are required for the excess coating agent.
- the invention comprises the general technical teaching that Coating agent not or not only by the boundary surfaces of the split channel in the bell cup to charge, but by at least one channel electrode, in the coating agent channel protrudes and preferably in the paint shop is under high voltage, with the channel electrode is preferably designed as a needle electrode.
- the channel electrode allows in the bell cup according to the invention advantageous a particularly effective electrical charging of the coating agent, resulting in an improvement of the application efficiency contributes.
- the channel electrode preferably to be understood that the channel electrode only protrudes from one side into the coating agent channel.
- the channel electrode protrudes from the rotary atomizer facing side in the Coating agent channel into it.
- the channel electrode protrudes from the rotary atomizer side facing away from the coating agent channel into it.
- the coating agent channel protrude into the coating agent charge.
- the arrangement of several channel electrodes is in Compared to a single channel electrode advantageous since so a uniform charge of the coating agent can achieve.
- the individual channel electrodes are in this respect the axis of rotation of the bell plate distributed over the circumference arranged.
- the bell cup three Channel electrodes each at an angular distance of 120 degrees are arranged.
- the invention is in terms of the number of channel electrodes not on three channel electrodes limited, but also with a larger or smaller number of channel electrodes feasible. In each However, it is advantageous if the channel electrodes equidistant from each other to minimize mutual potential flat a maximum charge of the coating agent to achieve.
- the channel electrode is in the coating agent channel preferably at least partially opposite Flow direction aligned to a flushing of the coating agent channel with a detergent an optimal To achieve cleaning effect at the channel electrode.
- the Channel electrode aligned parallel to the axis of rotation of the bell cup, which is particularly favorable in terms of manufacturing technology.
- the attachment of the channel electrode in the bell plate takes place preferably releasable to reach the channel electrode upon reaching to replace a wear limit.
- the channel electrode can then easy to be replaced.
- bell cup according to the invention preferably also a front electrode, as they were at the description of the prior art has been briefly explained.
- the channel electrode (s) become and the front electrode at the same high voltage potential charged.
- a contact element is preferably made of an electrically conductive material, the channel electrodes with each other and / or with the front electrode combines.
- This contact element can, for example consist of a circular disc-shaped plate made of an electrically conductive material and in the bell cup is embedded.
- the individual Channel electrodes and / or the front electrode electrically to contact separately, in order to different high-voltage potentials charge.
- the spray behavior can be influenced.
- the channel electrode is in an area the coating agent channel, which is flushable, so that the channel electrode of adhering coating agent residues can be exempted.
- the coating device according to the invention therefore preferably has a detergent channel on, wherein the detergent channel, the detergent at least partly on the channel electrode and / or on the front electrode directed.
- the channel electrode and / or the front electrode designed as a needle electrode to the most effective to achieve electrical charging of the coating composition.
- the invention is in terms of the shape of the Front electrode or the channel electrode not on a needle electrode is limited, but also with other electrode shapes realizable.
- the bell plate according to the invention preferably has an inner part and an outer part, wherein the coating agent channel between the inner part and the outer part runs.
- the inner part and / or the outer part of the bell plate made of an electrically conductive material.
- the inner part and / or the outer part of the bell plate consist of the inner part and / or the outer part of the bell plate, however, from an electric insulating material.
- bell plates limited for powder coating equipment is, but also bell plates for coating equipment comprising liquid paints as coating agents.
- the invention not only includes the above described bell cup according to the invention as a single Component, but also a rotary atomizer with a such bell plate.
- FIG. 1 shows an inventive Bell plate 1 attached to a conventional rotary atomizer can be attached to, for example, automotive body panels coat with a powder coating.
- the bell cup 1 has an outer part 2 and an inner part 3 on, wherein the outer part 2 by means of an external thread 4 in a bearing unit of the rotary atomizer are screwed can and is rotatably mounted about a rotation axis 5.
- the Drive of the bell cup 1 about the rotation axis 5 can in this case in a conventional manner by a compressed air turbine.
- rotary atomizer here are only two coaxial Hollow tubes 6, 7 shown, wherein the hollow tube 7 a coating agent channel 8 forms for the supply of powder coating, while the space between the two hollow tubes 6, 7th forms a detergent channel 9, fed by a detergent can be.
- the inner part 3 is about three axially extending fastening bolts 10 connected to the outer part 2 of the bell cup 1, wherein the fastening bolts 10 distributed over the circumference in Angular intervals of 120 ° are arranged.
- the bell cup 1 has a plurality of channel electrodes 12, which are formed as needle electrodes and protrude axially into the coating agent channel 11 to the coating agent passing through the coating agent channel 11 to charge to high voltage potential.
- the bell cup 1 has three channel electrodes 12 on, which is about the circumference of the bell plate 1 distributed equidistant at an angular distance of 120 ° each are arranged.
- the bell cup 1 on its front side Front electrode 13, which is also designed as a needle electrode is and from the bell cup 1 centrally protrudes axially, to create a space charge zone in front of the bell cup 1.
- the channel electrodes 12 are mutually and with the front electrode 13 through a plate-shaped contact element 14 connected to an electrically conductive material, so that the individual channel electrodes 12 at the same electrical potential lie like the front electrode 13.
- the channel electrodes 12 allow this a particularly effective Charging the through the coating agent channel 11th passing coating agent, whereby the order efficiency as far as can be increased in one Painting plant on elaborate recycling measures for recycling the excess paint (overspray) dispensed can be.
Landscapes
- Electrostatic Spraying Apparatus (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Beans For Foods Or Fodder (AREA)
- Nozzles (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10324074A DE10324074B4 (de) | 2003-05-27 | 2003-05-27 | Glockenteller für einen Rotationszerstäuber |
| DE10324074 | 2003-05-27 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1481733A2 true EP1481733A2 (fr) | 2004-12-01 |
| EP1481733A3 EP1481733A3 (fr) | 2006-02-22 |
| EP1481733B1 EP1481733B1 (fr) | 2008-07-02 |
Family
ID=33103606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04012245A Expired - Lifetime EP1481733B1 (fr) | 2003-05-27 | 2004-05-24 | Cloche de pulvérisateur rotatif |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1481733B1 (fr) |
| AT (1) | ATE399596T1 (fr) |
| DE (2) | DE10324074B4 (fr) |
| ES (1) | ES2309419T3 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006128811A1 (fr) * | 2005-06-03 | 2006-12-07 | Trasmetal S.P.A. | Dispositif de revetement electrostatique |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD134056A1 (de) * | 1977-12-14 | 1979-02-07 | N Proizv Ob Lakoraspokrytie | Elektrostatischer fliehkraftfluessigkeitszerstaeuber |
| SE438966B (sv) * | 1978-12-04 | 1985-05-28 | Gema Ransburg Ag | Sprutanordning for pulver, med i munstycksoppningen tangentiellt inledd spridningsgas |
| DE3129151A1 (de) * | 1980-08-06 | 1982-03-18 | National Research Development Corp., London | "vorrichtung zum elektrostatischen spruehen von fluessigkeit" |
| US4896834A (en) * | 1984-08-30 | 1990-01-30 | The Devilbiss Company | Rotary atomizer apparatus |
| HUT47048A (en) * | 1986-11-18 | 1989-01-30 | Gyoergy Benedek | Multiple-purpose electrostatic paint sprayer |
| US5397063A (en) * | 1992-04-01 | 1995-03-14 | Asahi Sunac Corporation | Rotary atomizer coater |
| FR2776946B1 (fr) * | 1998-04-01 | 2000-05-26 | Sames Sa | Bol de pulverisation et projecteur rotatif electrostatique equipe d'un tel bol |
| US6578779B2 (en) * | 2000-10-18 | 2003-06-17 | Behr Systems, Inc. | Rotary atomizer with bell element |
| DE10053295C2 (de) * | 2000-10-27 | 2002-10-31 | Eisenmann Lacktechnik Kg | Hochrotationszerstäuber zur Aufbringung von Pulverlack |
| US6708908B2 (en) * | 2001-06-29 | 2004-03-23 | Behr Systems, Inc. | Paint atomizer bell with ionization ring |
| US20030006321A1 (en) * | 2001-07-06 | 2003-01-09 | Mather Brian D. | Tubular voltage multiplier powder gun |
-
2003
- 2003-05-27 DE DE10324074A patent/DE10324074B4/de not_active Expired - Fee Related
-
2004
- 2004-05-24 AT AT04012245T patent/ATE399596T1/de not_active IP Right Cessation
- 2004-05-24 ES ES04012245T patent/ES2309419T3/es not_active Expired - Lifetime
- 2004-05-24 DE DE502004007473T patent/DE502004007473D1/de not_active Expired - Lifetime
- 2004-05-24 EP EP04012245A patent/EP1481733B1/fr not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006128811A1 (fr) * | 2005-06-03 | 2006-12-07 | Trasmetal S.P.A. | Dispositif de revetement electrostatique |
| US7942110B2 (en) | 2005-06-03 | 2011-05-17 | Trasmetal S.P.A. | Electrostatic coating device |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1481733A3 (fr) | 2006-02-22 |
| DE10324074A1 (de) | 2004-12-30 |
| DE502004007473D1 (de) | 2008-08-14 |
| ES2309419T3 (es) | 2008-12-16 |
| DE10324074B4 (de) | 2006-01-26 |
| EP1481733B1 (fr) | 2008-07-02 |
| ATE399596T1 (de) | 2008-07-15 |
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