EP2164644B1 - Projecteur rotatif de produit de revetement et installation comprenant un tel projecteur - Google Patents

Projecteur rotatif de produit de revetement et installation comprenant un tel projecteur Download PDF

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Publication number
EP2164644B1
EP2164644B1 EP08826448.6A EP08826448A EP2164644B1 EP 2164644 B1 EP2164644 B1 EP 2164644B1 EP 08826448 A EP08826448 A EP 08826448A EP 2164644 B1 EP2164644 B1 EP 2164644B1
Authority
EP
European Patent Office
Prior art keywords
primary
orifices
rotation
axis
sprayer 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.)
Active
Application number
EP08826448.6A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2164644A1 (fr
Inventor
Patrick Ballu
Olivier Gourbat
Eric Prus
Denis Vanzetto
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.)
Sames Kremlin SAS
Original Assignee
Sames Technologies SAS
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 Sames Technologies SAS filed Critical Sames Technologies SAS
Priority to PL08826448T priority Critical patent/PL2164644T3/pl
Publication of EP2164644A1 publication Critical patent/EP2164644A1/fr
Application granted granted Critical
Publication of EP2164644B1 publication Critical patent/EP2164644B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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-8,071,455 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 rotating projector body shown in Figure 6 of JP-A-8,071,455 is provided with several secondary orifices arranged on the same circle as the primary orifices and offset 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. These components are determined to inject air streams in front of the downstream face of the bowl, to reduce the depression caused by the rotation of the bowl at high speed.
  • 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.
  • each secondary air jet is 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 invention relates to a coating product projection installation, characterized in that it comprises at least one rotating projector as explained above.
  • the figure 1 shows a rotating projector for the projection of 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 about an axis X 1 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 X 1 of the bowl 1.
  • the primary and secondary orifices 4 4 are intended to emit respectively primary air jets 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 J 6 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 primary ports 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 J 6 .
  • each primary air jet is inclined with respect 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 primary 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 l 4 from the edge 12 of 1.5 mm.
  • the distance l 4 can be between 0 mm and 25 mm.
  • the distance l 4 depends in particular on the axial distance L 1 . Thus, when the distance L 1 is 50 mm, the distance l 4 can be between 0 and 50 mm.
  • Each secondary air jet is inclined relative to the axis of rotation X 1 in a secondary direction J 6 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 impinges on the rear surface 13 of the bowl 1, as is clearly apparent from the figure 2 .
  • the secondary direction J 6 is transverse to the axis of rotation X 1 .
  • the secondary direction J 6 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 by the figure 2 strikes the rear surface 13 at a zone 136, then spreads on the portion of the surface 13 located downstream of the zone 136 to the edge 12 and beyond in the axial direction X 1 .
  • 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 apart by 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 d 6 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 according to 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
  • 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 X 1 .
  • 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 rotating projector of Figures 1 to 4 in which the numerical references are incremented by 100 to designate objects similar to those of Figures 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 101 and is supplied 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, secondary 104 and tertiary orifices 108 respectively disposed on primary C 104 , secondary C 106 and tertiary C 108 primary contours.
  • the contours C 104 , C 106 and C 108 are planar and respectively elliptical, circular and rectangular.
  • the orifices 104, 106 and 108 are intended to emit respectively primary, secondary and tertiary air jets which are represented on the figure 5 by their respective directions J 104 , J 106 and J 108 .
  • the primary C 104 and tertiary C 108 contours are centered on the axis of rotation X 101 and have shapes, respectively elliptical and rectangular with rounded corners, which are elongated along the same main direction.
  • the jets of primary air J 104 and tertiary J 108 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, 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 J 106 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 of an orifice to another.
  • controlling the air jets of the projector Figures 1 to 4 can be achieved by quadrant.

Landscapes

  • Nozzles (AREA)
  • Electrostatic Spraying Apparatus (AREA)
  • Spray Control Apparatus (AREA)
EP08826448.6A 2007-06-13 2008-06-12 Projecteur rotatif de produit de revetement et installation comprenant un tel projecteur Active EP2164644B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08826448T PL2164644T3 (pl) 2007-06-13 2008-06-12 Rozpylacz obrotowy materiału powlekającego oraz urządzenie zawierające taki rozpylacz

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0704217A FR2917309B1 (fr) 2007-06-13 2007-06-13 Projecteur rotatif de produit de revetement et installation comprenant un tel projecteur.
PCT/FR2008/000813 WO2009010646A1 (fr) 2007-06-13 2008-06-12 Projecteur rotatif de produit de revetement et installation comprenant un tel projecteur

Publications (2)

Publication Number Publication Date
EP2164644A1 EP2164644A1 (fr) 2010-03-24
EP2164644B1 true EP2164644B1 (fr) 2015-12-02

Family

ID=38910909

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08826448.6A Active EP2164644B1 (fr) 2007-06-13 2008-06-12 Projecteur rotatif de produit de revetement et installation comprenant un tel projecteur

Country Status (10)

Country Link
US (1) US9314806B2 (pl)
EP (1) EP2164644B1 (pl)
JP (2) JP2010528854A (pl)
CN (1) CN101707924B (pl)
BR (1) BRPI0812957B1 (pl)
ES (1) ES2558154T3 (pl)
FR (1) FR2917309B1 (pl)
PL (1) PL2164644T3 (pl)
RU (1) RU2434689C2 (pl)
WO (1) WO2009010646A1 (pl)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2936434B1 (fr) * 2008-09-30 2014-07-25 Sames Technologies Projecteur rotatif et procede de projection de produit de revetement mettant en oeuvre un tel projecteur rotatif
GB2469539B (en) * 2009-09-21 2011-03-09 Dau Binh Chiu Rotary device and method for transmitting material
FR2989289B1 (fr) * 2012-04-13 2015-07-17 Sames Technologies Projecteur rotatif et methode de pulverisation d'un produit de revetement
JP5681779B1 (ja) * 2013-11-08 2015-03-11 ランズバーグ・インダストリー株式会社 静電塗装機
JP6181094B2 (ja) 2015-02-16 2017-08-16 トヨタ自動車株式会社 回転霧化型静電塗装機及びそのシェーピングエアリング
FR3053608B1 (fr) * 2016-07-11 2021-04-23 Exel Ind Jupe pour projecteur rotatif de produit de revetement comprenant au moins trois series de buses d'ejection d'air distinctes
US12109581B2 (en) * 2021-05-28 2024-10-08 Graco Minnesota Inc. Rotory bell atomizer shaping air configuration and air cap apparatus

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Also Published As

Publication number Publication date
CN101707924B (zh) 2014-11-05
BRPI0812957B1 (pt) 2019-10-29
FR2917309B1 (fr) 2013-10-25
WO2009010646A1 (fr) 2009-01-22
JP2010528854A (ja) 2010-08-26
FR2917309A1 (fr) 2008-12-19
RU2434689C2 (ru) 2011-11-27
BRPI0812957A2 (pt) 2014-12-09
ES2558154T3 (es) 2016-02-02
PL2164644T3 (pl) 2016-06-30
US9314806B2 (en) 2016-04-19
JP5865406B2 (ja) 2016-02-17
BRPI0812957A8 (pt) 2017-10-03
RU2010100884A (ru) 2011-07-20
US20100192848A1 (en) 2010-08-05
CN101707924A (zh) 2010-05-12
EP2164644A1 (fr) 2010-03-24
JP2014133232A (ja) 2014-07-24

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