EP2164644A1 - Rotary projector for coating product and equipment including such projector - Google Patents
Rotary projector for coating product and equipment including such projectorInfo
- Publication number
- EP2164644A1 EP2164644A1 EP08826448A EP08826448A EP2164644A1 EP 2164644 A1 EP2164644 A1 EP 2164644A1 EP 08826448 A EP08826448 A EP 08826448A EP 08826448 A EP08826448 A EP 08826448A EP 2164644 A1 EP2164644 A1 EP 2164644A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- primary
- orifices
- air
- rotation
- projector according
- 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
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
- B05B3/1092—Means for supplying shaping gas
Definitions
- the present invention relates to a rotary projector coating product, and a coating product projection installation comprising at least one such projector.
- a rotary coating product projection projector comprises a spraying member rotating at high speed under the effect of rotating drive means, such as a compressed air turbine.
- Such a spraying member generally has the shape of a rotationally symmetrical bowl and it comprises at least one spraying edge capable of forming a jet of coating product.
- the rotating projector also comprises a fixed body housing the rotating drive means as well as means for supplying the spray member with coating material.
- the jet of coating material sprayed from the edge of the rotating member has a generally conical shape which depends on such parameters as the rotation speed of the bowl and the flow rate of the coating product.
- the rotating projectors of the prior art are generally equipped with several primary orifices formed in the body of the projector and arranged on a circle centered on the axis of symmetry of the bowl.
- the primary orifices are intended to emit jets of primary air together forming an air of conformation of the jet of product, this air of conformation being sometimes called air of skirt.
- JP-A-8071 455 discloses a rotating projector provided with primary orifices for emitting jets of primary air to conform the jet of product.
- Each primary air jet is inclined relative to the axis of rotation of the bowl in a primary direction having an axial component and an orthoradial component.
- the primary air jets thus generate a flow of air swirling around the axis of rotation of the bowl and the jet of product of coating.
- This swirling air flow sometimes called "vortex" allows, in particular by adjusting its flow rate, to conform the jet of sprayed product by the edge depending on the desired application.
- the body of the rotating projector shown in Figure 6 of JP-A-8 071 455 is provided with a plurality of secondary orifices arranged on the same circle as the primary orifices and staggered with respect to these.
- Each secondary air jet from one of these secondary orifices is inclined relative to the axis of rotation in a secondary direction having an axial component and a radial component.
- the secondary air jets are intended to obtain a uniform deposited paint film.
- the secondary air jets reach directly into the depression zone located in front of the bowl and downstream thereof.
- the direction of each jet of secondary air is determined so as to prevent this jet of secondary air does not hit the rear surface of the bowl.
- the present invention aims in particular to overcome these disadvantages by providing a rotary coating product projection device offering a wide latitude in adjusting the shape of the product jet.
- the invention relates to a rotary projector coating product comprising:
- a product spraying member having at least one spray edge capable of forming a jet of product
- each secondary air jet being inclined relative to the axis of rotation in a primary direction having at least one axial component and one orthoradial component such that said primary air jet freely passes the region where the edge is located, each secondary air jet being inclined relative to the axis of rotation in a secondary direction having at least one axial component and one component radial.
- the components of each secondary air jet are such that said secondary air jet strikes an outer surface of the spray member.
- the secondary air jets burst on the spraying member, which allows a fine and uniform adjustment of the jet of sprayed product.
- the body has, in addition, tertiary orifices arranged on a tertiary contour surrounding the axis of rotation and intended to emit jets of tertiary air, each tertiary air jet being inclined with respect to the axis of rotation according to a tertiary direction having axial, radial and orthoradial components such that said tertiary air jet freely passes the region where the edge is located;
- At least one of the contours has a regular shape and not circular, for example elliptical or rectangular;
- each contour is associated in subgroups of orifices juxtaposed step by step, each of the subgroups being connected to an independent source of supply of compressed air via a valve, the valves being controllable independently of each other; -
- the primary and secondary contours are combined into a circle centered on the axis of rotation;
- the secondary direction has a zero orthoradial component
- the body has primary and secondary channels opening respectively to the primary and secondary ports, the primary and secondary channels being inclined relative to the axis of rotation respectively in the primary and secondary directions;
- the primary and secondary channels are made by drilling through an outer jacket and / or constituted by interstices formed between the outer jacket and an inner jacket, the jackets being arranged around the drive means of the rotating member and a rear part of the organ;
- the primary and secondary channels are respectively connected to a primary common chamber and to a secondary common chamber, these chambers being defined in the body and constituting two independent sources of supply of compressed air;
- the primary orifices are arranged on the circle alternately with the secondary orifices;
- the components of the primary air jets are determined so that the primary air jets flow at a radial distance from the edge of between 0 mm and 25 mm and preferably equal to 1.5 mm;
- the components of the secondary air jets are determined so that the secondary air jets strike the member at an axial distance from the edge of between 0 mm and 10 mm and, preferably, equal to 2.8 mm ;
- the circle on which the primary and secondary orifices are arranged has a diameter of between 58 mm and 80 mm and, preferably, equal to 68 mm for a bowl of diameter equal to 55 mm.
- the invention relates to a coating product projection installation, characterized in that it comprises at least one rotating projector as explained above.
- FIG. 1 is a truncated perspective view of a projector according to the invention
- FIG. 1 is a partial side view of the projector of Figure 1;
- FIG. 3 is a front view of the projector of Figure 1;
- FIG. 4 is a perspective view, on a smaller scale and with tear, the projector of Figure 1;
- FIG. 5 is a front view of a projector according to another embodiment of the invention.
- FIG. 1 shows a rotating projector for projecting coating product comprising a spraying member 1, hereinafter referred to as a bowl, partially housed within a body 2.
- the bowl 1 is shown in a spray position where it is rotated at high speed around an axis Xi by unrepresented drive means.
- the body 2 is fixed, that is to say it does not rotate about the axis X 1 , and it can be mounted on a not shown support such as a multi-axis robot arm.
- a distributor 3 is secured to the upstream portion of the bowl 1 to channel and distribute the coating product.
- the speed of rotation of the bowl 1 under load that is to say when spraying the product, can be between 30,000 rpm and 70,000 rpm.
- the bowl 1 has a symmetry of revolution about the axis X 1 .
- the bowl 1 has a distribution surface 11 on which the coating product spreads, under the effect of centrifugal force, to a spray edge 12 where it is micronized into fine droplets.
- the set of droplets forms a jet J 1 of product leaving the bowl 1 and heading towards a not shown coating object on which it produces an impact surface.
- the outer rear surface 13 of the bowl that is to say the surface which is not turned towards its axis of symmetry X 1 , is turned towards the body 2.
- the body 2 has primary orifices 4 and secondary orifices 6 arranged on the same circle C centered on the axis of symmetry Xi of the bowl 1.
- the primary and secondary orifices 4 and 6 are respectively intended to emit jets of primary air and secondary air jets which are represented in the figures by their respective directions J 4 and J 6 .
- the edge 12 is at an axial distance L 1 of the circle C which is here 10 mm.
- the distance L 1 thus represents the passing of the bowl 1 out of the body 2.
- the primary directions J 4 and secondary I are here respectively determined by the inclinations of primary channels 40 and secondary channels 60 defined in the body 2.
- the channels 40 and 60 are rectilinear and open respectively to the orifices primary 4 and secondary 6. Upstream, the channels 40 and 60 are connected to two independent sources of compressed air supply described below to form the jets J 4 and Je-
- each primary air jet is inclined relative to the axis of rotation X 1 in a primary direction J 4 , which has an axial component A 4 and a orthoradial component O 4 .
- the components A 4 and O 4 are such that a primary air jet J 4 can freely cross the region where the edge 12 is located.
- the primary jets J 4 do not hit the rear surface 13 of the bowl 1.
- a secondary direction J 4 is oblique with respect to the axis X 1 it does not intersect.
- the primary jets J 4 together generate a swirling air flow, or vortex air, capable of influencing the shape of the coating product jet.
- the components A 4 and O 4 of a primary air jet J4 are determined so that this jet flows at a radial distance 4 4 of the edge 12 of 1.5 mm.
- the distance 4 may be between 0 mm and 25 mm.
- the distance £ 4 depends in particular on the axial distance L 1 . Thus, when the distance Li is 50 mm, the distance 4 4 can be between 0 and 50 mm.
- Each secondary air jet is inclined relative to the axis of rotation Xi in a secondary direction I having an axial component A 6 and a radial component R 6 .
- the components A 6 and R 6 are determined so that a jet of secondary air J 6 hits the rear surface 13 of the bowl 1, as is clear from Figure 2.
- the secondary direction I is transverse to the axis of rotation X-
- the secondary direction JQ here has a zero orthoradial component, so that it can be likened to a generator of a cone whose vertex belongs to the axis X 1 .
- the secondary air jet J 6 illustrated in FIG. 2 strikes the rear surface 13 at a zone 136, then spreads on the part of the surface 13 situated downstream of the zone 136 as far as the ridge 12 and beyond in the axial direction Xi. This makes it possible to generate a secondary air stream in the form of a relatively uniform sheet and able to adjust the shape of the jet of product, thus modifying the impact surface on the object to be coated.
- the zone 136 is located upstream of the edge 12 at an axial distance L 136 of 28 mm here. In practice, the distance L 136 can be between 0 mm and 10 mm.
- the diameter D of the circle C which depends in particular on the diameter of the edge 12, is here 68 mm for a bowl 1 of diameter equal to 55 mm. In practice, it may be between 58 mm and 80 mm for such a bowl.
- the primary orifices 4 are arranged alternately with the secondary orifices 6.
- the primary and secondary orifices 4 and 6 are distributed uniformly over the circle C, so that two successive primary orifices 4 or two successive secondary orifices 6 are spaced at the same angle ⁇ equal to 12 °.
- this angle ⁇ can be between 6 ° and 24 °.
- a primary orifice 4 and a neighboring secondary orifice 6 are spaced apart by an angle ⁇ equal to 6 °, that is to say half the angle ⁇ separating, for example, two successive primary orifices 4.
- the angular difference ⁇ between a primary orifice 4 and a secondary orifice 6 may be between 3 ° and 12 °.
- the number and the distribution of the primary and secondary orifices 6 is determined according to the precision sought for the control of the shape of the product jet and the desired regularity for the impact surface. Thus, the more numerous the orifices 4 and 6, the more the impact surface is regular. Alternatively, there may be primary orifices and secondary orifices in different numbers.
- the primary and secondary orifices 4 have respective diameters d 4 and of 0.8 mm and 0.8 mm. Such dimensions make it possible to emit primary and secondary air jets with flow rates of 700 L / min and 500 L / min respectively, when they are fed at pressures of 6 bars and 6 bars, respectively.
- the diameters d 4 and d 6 of the primary and secondary orifices 4 and 6 may respectively be between 0.5 mm and 1.5 mm and between 0.5 mm and 1.5 mm. In particular, the diameters d 4 and d 6 may be different from each other.
- the primary and secondary channels 40 extend rectilinearly through an outer jacket 22 which extends a cap 20 defining the outer casing of the body 2.
- the channels 40 and 60 are made by means of drilling operations at the appropriate angles.
- the primary channels 40 are connected upstream to a primary chamber 23 which is common to them and which is itself connected to a source of compressed air not shown.
- the secondary channels 60 are connected to a secondary chamber 25 which is common to them and which is connected to a source of compressed air not shown and independent of the source supplying the primary channels 40.
- the primary and secondary chambers 23 are here formed between the outer jacket 22 and an inner liner 24, and they are separated by an O-ring seal 26.
- the internal adjective here means an object close to the axis of rotation X 1 , while the external adjective refers to an object that is further away.
- the shirts 22 and 24 generally have a symmetry of revolution about the axis Xi.
- the primary channels 40 and / or secondary 60 may be defined by interstices formed between the outer jack 22 and inner 24. These interstices can in this case be made by machining notches on one and / or the other of facing surfaces of the inner and outer sleeves 24 and 22.
- FIG. 5 illustrates a variant of the rotary projector of FIGS. 1 to 4 in which the numerical references are incremented by 100 to designate objects similar to those of FIGS. 1 to 4.
- This rotating projector for projecting coating product comprises a bowl 101 similar to the bowl 1 and housed partially within a body 102 fixed.
- the bowl 101 can be rotated at high speed around an axis X 10 i and is fed with product via a distributor 103.
- the bowl 101 has a distribution surface 111 on which the coating product spreads to a spray edge 112 where it is micronized into fine droplets.
- the body 102 has primary apertures 104, secondary 106 and tertiary 108 respectively disposed on the primary contours Ci 04, secondary and tertiary C-io ⁇ C 10 8-
- the contours 04, C 06 and Cios are flat and elliptic respectively, circular and rectangular.
- the orifices 104, 106 and 108 are intended to emit respectively primary, secondary and tertiary air jets which are represented in FIG. 5 by their respective directions Jio 4 , J106 and Jio ⁇ -
- the primary contours C 1 O 4 and tertiary C-m ⁇ are centered on the axis of rotation X 101 and they have shapes, respectively elliptical and rectangular with rounded corners, which are elongate in the same main direction.
- the jets of primary air Ji 04 and tertiary J-io ⁇ make it possible to conform the jet of sprayed product by flattening it. This makes it possible to optimize the recovery of the impacts on the object to be coated and, consequently, the uniformity of the deposited thickness.
- the orifices 104, 106 or 108 are associated in four subgroups of orifices so as to form four quadrants I 1 II, III and IV.
- the orifices of the same subgroup delimited by a quadrant are juxtaposed step by step, that is to say that they form an uninterrupted sequence.
- Each subgroup is connected to an independent source of compressed air supply through a valve not shown.
- the four valves of the four subgroups of the same contour are independent of each other, so that the shape of the primary, secondary and tertiary air jets can be modulated. For this, it is possible to supply compressed air to the orifices of certain quadrants without supplying those of the remaining quadrants.
- the division of the subgroups can be done other than by quadrants.
- the directions J 6 or Ji 06 of the secondary air jets may be more or less inclined in the radial direction, so as to hit the bowl at a distance L 136 of the variable edge from one orifice to another.
- control of the air jets of the projector of FIGS. 1 to 4 can be done by quadrant.
Landscapes
- Nozzles (AREA)
- Electrostatic Spraying Apparatus (AREA)
- Spray Control Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL08826448T PL2164644T3 (en) | 2007-06-13 | 2008-06-12 | Rotary atomizer for coating product and device including such atomizer |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0704217A FR2917309B1 (en) | 2007-06-13 | 2007-06-13 | ROTATING PROJECTOR OF COATING PRODUCT AND INSTALLATION COMPRISING SUCH A PROJECTOR. |
PCT/FR2008/000813 WO2009010646A1 (en) | 2007-06-13 | 2008-06-12 | Rotary projector for coating product and equipment including such projector |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2164644A1 true EP2164644A1 (en) | 2010-03-24 |
EP2164644B1 EP2164644B1 (en) | 2015-12-02 |
Family
ID=38910909
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08826448.6A Active EP2164644B1 (en) | 2007-06-13 | 2008-06-12 | Rotary atomizer for coating product and device including such atomizer |
Country Status (10)
Country | Link |
---|---|
US (1) | US9314806B2 (en) |
EP (1) | EP2164644B1 (en) |
JP (2) | JP2010528854A (en) |
CN (1) | CN101707924B (en) |
BR (1) | BRPI0812957B1 (en) |
ES (1) | ES2558154T3 (en) |
FR (1) | FR2917309B1 (en) |
PL (1) | PL2164644T3 (en) |
RU (1) | RU2434689C2 (en) |
WO (1) | WO2009010646A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2936434B1 (en) * | 2008-09-30 | 2014-07-25 | Sames Technologies | ROTARY PROJECTOR AND METHOD FOR PROJECTING A COATING PRODUCT USING SUCH A ROTARY PROJECTOR |
GB2469539B (en) * | 2009-09-21 | 2011-03-09 | Dau Binh Chiu | Rotary device and method for transmitting material |
FR2989289B1 (en) | 2012-04-13 | 2015-07-17 | Sames Technologies | ROTARY PROJECTOR AND METHOD FOR SPRAYING A COATING PRODUCT |
JP5681779B1 (en) * | 2013-11-08 | 2015-03-11 | ランズバーグ・インダストリー株式会社 | Electrostatic coating machine |
JP6181094B2 (en) | 2015-02-16 | 2017-08-16 | トヨタ自動車株式会社 | Rotary atomizing electrostatic coating machine and its shaping air ring |
FR3053608B1 (en) | 2016-07-11 | 2021-04-23 | Exel Ind | SKIRT FOR ROTARY SPOTLIGHT FOR COATING PRODUCTS INCLUDING AT LEAST THREE SERIES OF SEPARATE AIR EJECTION NOZZLES |
US20210387213A1 (en) * | 2021-05-28 | 2021-12-16 | Graco Minnesota Inc. | Rotory bell atomizer shaping air configuration and air cap apparatus |
Family Cites Families (24)
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JPS59127762U (en) * | 1983-02-15 | 1984-08-28 | 日産自動車株式会社 | rotary electrostatic spray gun |
US5141156A (en) * | 1987-12-21 | 1992-08-25 | Union Carbide Chemicals & Plastics Technology Corporation | Methods and apparatus for obtaining a feathered spray when spraying liquids by airless techniques |
JPH01249148A (en) * | 1988-03-30 | 1989-10-04 | Nissan Motor Co Ltd | Method for controlling coating pattern of rotary atomizing electrostatic coating machine |
JPH07256156A (en) | 1994-03-25 | 1995-10-09 | Toyota Motor Corp | Rotary-atomization electrostatic coating application device |
JP3473718B2 (en) | 1994-07-22 | 2003-12-08 | 日産自動車株式会社 | Rotary atomization electrostatic coating method and apparatus |
JPH0833859A (en) * | 1994-07-22 | 1996-02-06 | Nissan Motor Co Ltd | Rotary atomizing electrostatic coating apparatus |
JP3248361B2 (en) * | 1994-09-09 | 2002-01-21 | トヨタ自動車株式会社 | Rotary atomizing electrostatic coating equipment |
JPH0899052A (en) * | 1994-09-29 | 1996-04-16 | Abb Ransburg Kk | Rotary atomizing head-type coating apparatus |
JP3273432B2 (en) * | 1994-11-11 | 2002-04-08 | エービービー株式会社 | Rotary atomizing head type coating equipment |
JPH08196946A (en) * | 1995-01-30 | 1996-08-06 | Mazda Motor Corp | Rotary atomization type coating apparatus and method |
JPH0985134A (en) * | 1995-09-27 | 1997-03-31 | Nissan Motor Co Ltd | Rotary atomizing electrostatic coating method and device therefor |
JP3307266B2 (en) * | 1996-04-15 | 2002-07-24 | トヨタ自動車株式会社 | Spray pattern variable rotation atomization coating equipment |
JPH1076190A (en) | 1996-09-05 | 1998-03-24 | Abb Ind Kk | Rotary atomizing head type coater |
JP2002224611A (en) * | 2001-02-01 | 2002-08-13 | Toyota Motor Corp | Coating method |
KR101106696B1 (en) * | 2003-07-24 | 2012-01-18 | 랜스버그 인더스트리얼 피니싱 케이.케이. | Electrostatic painting device |
WO2005115636A1 (en) * | 2004-05-27 | 2005-12-08 | Abb K.K. | Method for controlling spray pattern of rotary atomizing head type coating device and rotary atomizing head type coating device |
DE102005004081A1 (en) * | 2005-01-28 | 2006-08-03 | Daimlerchrysler Ag | Dishwashing agent-saving rotary atomizer |
DE102005015604B4 (en) * | 2005-04-05 | 2007-04-12 | Dürr Systems GmbH | Rotationszerstäuberbauteil |
JP2007000826A (en) * | 2005-06-27 | 2007-01-11 | Duerr Japan Kk | Bell type coating apparatus |
US7611069B2 (en) * | 2005-08-09 | 2009-11-03 | Fanuc Robotics America, Inc. | Apparatus and method for a rotary atomizer with improved pattern control |
DE102006019890B4 (en) * | 2006-04-28 | 2008-10-16 | Dürr Systems GmbH | Atomizer and associated operating method |
JP2008093521A (en) * | 2006-10-06 | 2008-04-24 | Ransburg Ind Kk | Rotary electrostatic coating device |
DE102006054786A1 (en) * | 2006-11-21 | 2008-05-29 | Dürr Systems GmbH | Operating method for a nebulizer and corresponding coating device |
JP2008188505A (en) * | 2007-02-01 | 2008-08-21 | Honda Motor Co Ltd | Rotation atomization coating machine and rotation atomization coating liquid applying method |
-
2007
- 2007-06-13 FR FR0704217A patent/FR2917309B1/en active Active
-
2008
- 2008-06-12 CN CN200880019737.0A patent/CN101707924B/en active Active
- 2008-06-12 PL PL08826448T patent/PL2164644T3/en unknown
- 2008-06-12 ES ES08826448.6T patent/ES2558154T3/en active Active
- 2008-06-12 EP EP08826448.6A patent/EP2164644B1/en active Active
- 2008-06-12 JP JP2010511685A patent/JP2010528854A/en active Pending
- 2008-06-12 RU RU2010100884/05A patent/RU2434689C2/en active
- 2008-06-12 BR BRPI0812957-6A patent/BRPI0812957B1/en not_active IP Right Cessation
- 2008-06-12 US US12/664,486 patent/US9314806B2/en active Active
- 2008-06-12 WO PCT/FR2008/000813 patent/WO2009010646A1/en active Application Filing
-
2014
- 2014-02-24 JP JP2014032553A patent/JP5865406B2/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2009010646A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP2010528854A (en) | 2010-08-26 |
CN101707924B (en) | 2014-11-05 |
BRPI0812957A8 (en) | 2017-10-03 |
CN101707924A (en) | 2010-05-12 |
JP2014133232A (en) | 2014-07-24 |
FR2917309B1 (en) | 2013-10-25 |
RU2434689C2 (en) | 2011-11-27 |
PL2164644T3 (en) | 2016-06-30 |
JP5865406B2 (en) | 2016-02-17 |
EP2164644B1 (en) | 2015-12-02 |
BRPI0812957A2 (en) | 2014-12-09 |
ES2558154T3 (en) | 2016-02-02 |
RU2010100884A (en) | 2011-07-20 |
US20100192848A1 (en) | 2010-08-05 |
FR2917309A1 (en) | 2008-12-19 |
US9314806B2 (en) | 2016-04-19 |
WO2009010646A1 (en) | 2009-01-22 |
BRPI0812957B1 (en) | 2019-10-29 |
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