EP2809450A1 - Rotationszerstäuber - Google Patents
RotationszerstäuberInfo
- Publication number
- EP2809450A1 EP2809450A1 EP13706168.5A EP13706168A EP2809450A1 EP 2809450 A1 EP2809450 A1 EP 2809450A1 EP 13706168 A EP13706168 A EP 13706168A EP 2809450 A1 EP2809450 A1 EP 2809450A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coating material
- bell cup
- bell
- cleaning medium
- fluid
- 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- Withdrawn
Links
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
- B05B3/1007—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 characterised by the rotating member
- B05B3/1014—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 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
- 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
-
- 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
- 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
- B05B15/555—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 discharged by cleaning nozzles
-
- 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
- B05B15/557—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 the cleaning fluid being a mixture of gas and liquid
-
- 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
- B05B3/1092—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
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/06—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane
- B05B7/062—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet
- B05B7/066—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet with an inner liquid outlet surrounded by at least one annular gas outlet
- B05B7/067—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet with an inner liquid outlet surrounded by at least one annular gas outlet the liquid outlet being annular
Definitions
- the invention relates to a rotary atomizer for applying a coating material to an article having a) a bell plate rotatable about an axis of rotation
- a steering device with at least one discharge opening, to which a steering fluid can be supplied and through which the steering fluid is passed to the thrown off coating material, wherein the coating material is bundled by the steering device into a spray jet; c) a cleaning device, by means of which the bell ⁇ plate can be acted upon with a cleaning medium.
- Such rotary atomizers are used, for example, in the automotive industry to paint articles such as parts of vehicle bodies, or to coat with a protective material.
- the bell cup serves to atomize the coating material, for which it is rotated about its axis of rotation in operation with very high rotational speeds of 10,000 to 100,000 U min -1.
- the rotating bell ⁇ plate is supplied to the selected coating material. Due to centrifugal forces, which act on the coating material, it is driven on the bell cup as a film to the outside, until it reaches a radially outer spoiler lip of the bell cup. There, such high Centrifugal forces on the coating material that it is thrown tangentially in the form of fine coating material droplets.
- a steering device In order to focus this spray on an object to be coated, steering devices have become established in known rotary atomizers. With these, a usually annular shaping air flow is directed onto the spray jet in such a way that it is bundled and the droplets of different sizes are directed directed onto the object to be coated.
- a steering device comprises a plurality of discharge openings, which are arranged radially adjacent to the bell cup around this.
- overspray When painting objects, a portion of the paint emitted by the rotary atomizer, the so-called overspray, always does not reach the object. In the course of a painting process, part of this overspray settles again on the bell cup, which is why it must be cleaned from time to time. Especially the outer surface of the bell cup is affected. Also arranged radially adjacent to the bell cup discharge openings for the shaping air can clog by deposited overspray.
- one, several or all of existing delivery openings for the steering fluid is also used as a delivery opening for a cleaning medium.
- the steering fluid so usually steering air, is passed through the discharge opening and the discharge openings on the bell cup. This then also applies to a cleaning medium, since nothing is changed at the orientation of the discharge openings.
- the discharge openings themselves are automatically cleaned during each cleaning process, since they are then always flowed through by cleaning medium. The risk of clogging the delivery opening (s) is thus considerably reduced.
- the pulse control unit is arranged in a fluid line, via which a gaseous working fluid is conducted from a fluid source to the discharge opening.
- the working fluid is air.
- gases such as C0 2 or nitrogen can be used.
- the cleaning and drying of the bell cup can be made particularly variable if a distributor device is present, which is connected to a fluid line and a detergent line and through which as a cleaning medium optionally gaseous working fluid, detergent and / or a mixture of the gaseous working fluid and the detergent the at least one dispensing opening can be dispensed.
- a distributor device which is connected to a fluid line and a detergent line and through which as a cleaning medium optionally gaseous working fluid, detergent and / or a mixture of the gaseous working fluid and the detergent the at least one dispensing opening can be dispensed.
- a preheating unit through which gaseous working fluid can be heated, in particular the required drying time for the bell cup can be shortened.
- a specifically faster drying of the outer surface of the bell cup can be achieved if at least a portion of the heated working fluid to at least one discharge opening and from there to the outer surface of the bell cup is leitbar.
- FIGURE shows an axial section of a nozzle head of a rotary atomizer and schematically illustrated supply units. in the figure, with a total of 2 a rotary atomizer be distinguished, of which only a head portion 4 is shown with a nozzle head 6.
- lacquer can be appli on a not specifically shown item appli.
- the nozzle head 6 comprises a rotationally symmetrical
- Bell plate 8 This is formed in the presently described embodiment in total as a hollow truncated cone 10 with a circumferential wall 12 and has a frusto-conical inner surface 14 and a frusto-conical outer surface 16.
- the bell plate 8 may also have deviating geometries, as they in and of themselves with bell plates are known in the art.
- the bell cup 8 is rotatable at high speed about its axis of rotation 18, to which the rotary atomizer 2 comprises a drive means 20 which is illustrated in the figure lent schematically schematically.
- the bell cup 8 can be driven, for example by means of an electric motor or pneuma table.
- the bell cup 8 rotates in Be operation at a rotational speed of 10,000 to 100,000 min -1 about its axis of rotation 18th
- the bell cup 8 is supported by the free end of a bell-shaft 8 coaxial hollow shaft 22 which is coupled to the drive means 20 and which defines a supply channel 24 for coating material in the longitudinal direction.
- a coating material is hereinafter assumed from a paint, but other Be coating materials, such as fluidized powder coatings, can be applied by means of the rotary atomizer to an object.
- a paint line 28 leads to an orifice 30, at which the paint line 28 merges into a material line 32, which in turn leads to the feed channel 24 of the rotary atomizer 2, so that the feed channel 24 paint from the paint reservoir 26 can be supplied.
- a valve 33 is arranged in the paint line 28, through which the paint supply can be selectively released or interrupted.
- the paint passes in a manner known per se to the inner circumferential surface 14 of the bell cup 8, which serves as a frustoconical outflow surface.
- the paint then passes due to the rotation of the bell cup 8 as a paint film on the inner circumferential surface 14 further forward to the edge remote from the hollow shaft 22 of the bell cup 8, which forms a trailing edge.
- the paint film is thrown in the form of paint droplets. This produces droplets of different sizes, which extend over a relatively large area.
- a steering device 34 is provided by means of which a steering fluid can be blown onto the paint droplets thrown away by the bell disk 8.
- a steering fluid air is used in the present embodiment.
- the steering device 34 comprises a hollow space 22 radially surrounding annular space 36, from which steering air can be discharged through discharge openings 38 in the direction of the outer circumferential surface 16 of the bell cup 8 and thrown away by this Lacktröpfchen.
- the discharge openings 38 are distributed in the circumferential direction around the hollow shaft 22 and the bell cup 8. A part of the flow paths of the shaping air is illustrated in the figure by small arrows, but the complete outer circumferential surface 16 of the bell crank Lers 8 is reached by Lenkluft.
- the annular space 36 compressed air can be supplied via a supply line 40.
- This is connected to the single and designated 42 output of a distribution device in the form of a 3/4 valve device 44, which also has two inputs 46.1, 46.2, namely a compressed air inlet 46.1 and a detergent inlet 46.2.
- 3/4-valve device is intended to express that the valve device has three connections and allows four valve positions. In the present case, this means that the 3/4 valve device 44 can close both inputs 46.1, 46.2 or alternatively connect the input 46.1 or the input 46.2 or both inputs 46.1, 46.2 to the output 42.
- the input 46.1 of the 3/4-Ventilverteil est 44 is connected to a first compressed air branch 48a of a for this first compressed air branch 48a and a second compressed air branch 48b forking compressed air line 48, which is fed from a compressed air source 50.
- a check valve 52 is arranged, which closes in the direction of the fork of the compressed air line 48.
- the compressed air line 48 and the compressed air branches 48a, 48b form fluid lines for a gaseous working fluid, the compressed air source 50 correspondingly providing a source of fluid.
- the working fluid in the present case is air, but it may be another gas depending on local requirements.
- a pulse control unit 54 through which compressed air pulsed in the 3/4-valve unit 44 and further into the supply line 40 and above in the annular space 36 of the steering device 34 can be fed.
- a compressed air preheating unit 56 This can e.g. comprise electrically operated heating coils which surround the compressed air line 48.
- the compressed air preheating unit 56 can be selectively activated or deactivated, so that the compressed air can be heated there either way or not.
- the rotary atomizer 2 now also includes a cleaning device 58 to clean the bell cup 8.
- a rinsing agent source 60 is present, which feeds a rinsing agent line 62 which bifurcates into a first rinsing agent branch 62a and a second rinsing agent branch 62b.
- the first flushing agent branch 62a is connected to one of two inputs 64.1, 64.2, namely with a flushing agent inlet 64.2, another distributor device in the form of a 4/10 valve device 66.
- the other input 64.1 of the 4/10 valve device 66 forms a compressed air input 64.1 and is connected to the second compressed air branch 48b of the compressed air line 48.
- the 4/10 valve device 66 has two outputs 68.1 and 68.2, of which the first output 68.1 . is connected to a separate cleaning medium line 70 which leads into the feed channel 24 in the hollow shaft 22 of the rotary atomizer 2.
- the second outlet 68.2 of the 4/10 valve device 66 is connected to a bypass line 72, which opens into the material line 32 at the point of discharge 30.
- the term 4/10 valve device is intended to express that the valve device has four connections and allows ten valve positions. In the present case, this means that the 4/10 valve device 66 can close both inputs 64.1, 64.2. In addition, it can selectively connect either the input 46.1 or the input 46.2 or both inputs 46.1, 46.2 to the output 68.1 or the output 68.2 or both outputs 68.1, 68.2.
- the paint passes with open valve 33 from the paint reservoir 26 via the paint line 28 and the material line 32 into the feed channel 24 and the bell cup 8, from which it is then thrown.
- the 3/4-valve device 44 only allows compressed air in the supply line 40, wherein the pulse control unit 54 and the preheating unit 56 are deactivated.
- both inputs 64.1, 64.2 are closed.
- the valve 33 is closed, so that no paint can flow into the material line 32.
- the inputs 64.1 and 64.2 and the output 68.1 of the 4/10 valve unit 66 are opened, so that an air / detergent mixture as a cleaning medium via the cleaning medium line 70 into the feed channel 24 of the rotary atomizer 2 and above to Inner circumferential surface 14 of the bell plate 8 passes.
- only detergent can be pumped as a cleaning medium from the detergent source 60 in the feed 24 who ⁇ the by the compressed air input 64.1 of the 4/10 valve unit 66 is closed or remains.
- the supply channel 24, only compressed air can be supplied as a cleaning medium by reversed open the detergent inlet 64.2, the compressed air input 64.1, however, is closed. This can be helpful, for example, if the feed channel 24 of the hollow shaft 22 and the inner circumferential surface 14 of the bell cup 8 are to be blown off after a cleaning operation in order to dry it.
- both inputs 46.1 and 46.2 are analogously opened so that an air / detergent mixture passes as cleaning medium via the supply line 40 into the annular space 36 of the steering device 34. From there, the cleaning medium is discharged through the discharge openings 38 on the outer circumferential surface 16 of the bell cup 8.
- only detergent from the detergent source 60 can be pumped as a cleaning medium in the annular space 36.
- the detergent inlet 46.2 of the 3/4 valve unit 44 is opened while the compressed air inlet 46.1 remains closed.
- only compressed air can be supplied to the feed channel 24 as a cleaning medium in order to blow off and dry the bell plate 8 from the outside after the cleaning process.
- the compressed air input 46.1 is opened and the flushing agent inlet 46.2 is closed.
- 3/4-valve device 44 can selectively deliver air, rinsing agent and / or an air / detergent mixture to the discharge openings 38. the .
- a heated fluid flow in the present case a heated air flow
- a heated air flow can be generated to the discharge openings 38 and / or to the inner circumferential surface 14 of the bell cup 8.
- From the discharge openings 38 of the heated air flow reaches the outer circumferential surface 16 of the bell plate 8.
- At least one of the dispensing openings 38 of the steering device 34 can be supplied with cleaning medium, which then flows through the respective dispensing opening 38 onto the dispensing opening 38
- Bell plate 8 is passed.
- the outer circumferential surface 16 of the bell cup 8 is cleaned without the need for one or more additional discharge openings for cleaning medium must be provided for this purpose, which must be supplied separately with a cleaning medium.
- the discharge openings 38 are cleaned, which can often be clogged by deposited overspray.
- on the outer circumferential surface 16 of the bell cup 8 can form incrustations of overspray, which are more difficult to remove.
- the cleaning effect of the cleaning device 58 can still be increased by the pulse control unit 54 is activated, whereby a pulsed jet of cleaning medium on the bell cup 8 can be generated. In this case, therefore, the air / detergent mixture is pulsed discharged to the bell cup 8, whereby possible paint islands are better removed.
- the bypass line 72 can be given in a corresponding manner, rinsing agent, an air / detergent mixture or compressed air in the material line 32, which then also flows to the bell cup 8. In this way, however, the material line 32 can be cleaned and dried, which is necessary, for example, in the case of a pending color change
Landscapes
- Electrostatic Spraying Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012001896A DE102012001896A1 (de) | 2012-02-01 | 2012-02-01 | Rotationszerstäuber |
| PCT/EP2013/000211 WO2013113483A1 (de) | 2012-02-01 | 2013-01-24 | Rotationszerstäuber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2809450A1 true EP2809450A1 (de) | 2014-12-10 |
Family
ID=47750606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP13706168.5A Withdrawn EP2809450A1 (de) | 2012-02-01 | 2013-01-24 | Rotationszerstäuber |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2809450A1 (de) |
| DE (1) | DE102012001896A1 (de) |
| WO (1) | WO2013113483A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017101370A1 (de) * | 2017-01-25 | 2018-07-26 | Eisenmann Se | Vorrichtung zum Vernebeln einer Spülflüssigkeit |
| WO2021081342A1 (en) | 2019-10-25 | 2021-04-29 | Graco Minnesota Inc. | Spray applicator with a stationary mix chamber |
| CA3219541A1 (en) * | 2021-06-04 | 2022-12-08 | John R. Ingebrand | Solvent dosing for a spray applicator |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB284049A (en) * | 1926-11-15 | 1928-01-26 | James Arthur Reavell | An improved method of and means for evaporating liquids |
| US6569258B2 (en) * | 2001-05-16 | 2003-05-27 | Fanuc Robotics North America, Inc. | Method and apparatus for cleaning a bell atomizer spray head |
| DE10239517A1 (de) * | 2002-08-28 | 2004-03-11 | Dürr Systems GmbH | Beschichtungseinrichtung mit einem Rotationszerstäuber und Verfahren zum Steuern ihres Betriebes |
| JP2005034704A (ja) * | 2003-07-16 | 2005-02-10 | Asahi Sunac Corp | 塗装装置 |
| DE102005004081A1 (de) * | 2005-01-28 | 2006-08-03 | Daimlerchrysler Ag | Spülmittelsparender Rotationszerstäuber |
| DE102006019890B4 (de) * | 2006-04-28 | 2008-10-16 | Dürr Systems GmbH | Zerstäuber und zugehöriges Betriebsverfahren |
| US20080047591A1 (en) * | 2006-08-25 | 2008-02-28 | Seitz David M | Bell cup cleaning system and method |
-
2012
- 2012-02-01 DE DE102012001896A patent/DE102012001896A1/de not_active Withdrawn
-
2013
- 2013-01-24 WO PCT/EP2013/000211 patent/WO2013113483A1/de not_active Ceased
- 2013-01-24 EP EP13706168.5A patent/EP2809450A1/de not_active Withdrawn
Non-Patent Citations (2)
| Title |
|---|
| None * |
| See also references of WO2013113483A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102012001896A1 (de) | 2013-08-01 |
| WO2013113483A1 (de) | 2013-08-08 |
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