WO2008044527A1 - Appareil de revêtement rotatif électrostatique - Google Patents

Appareil de revêtement rotatif électrostatique Download PDF

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Publication number
WO2008044527A1
WO2008044527A1 PCT/JP2007/069210 JP2007069210W WO2008044527A1 WO 2008044527 A1 WO2008044527 A1 WO 2008044527A1 JP 2007069210 W JP2007069210 W JP 2007069210W WO 2008044527 A1 WO2008044527 A1 WO 2008044527A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
shaving
pattern control
discharge port
control air
Prior art date
Application number
PCT/JP2007/069210
Other languages
English (en)
Japanese (ja)
Inventor
Kenichi Mori
Original Assignee
Ransburg Industrial Finishing K.K.
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 Ransburg Industrial Finishing K.K. filed Critical Ransburg Industrial Finishing K.K.
Priority to CA2665181A priority Critical patent/CA2665181C/fr
Priority to EP07828950.1A priority patent/EP2058053A4/fr
Publication of WO2008044527A1 publication Critical patent/WO2008044527A1/fr

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
    • 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
    • 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

Definitions

  • the present invention relates to a rotary electrostatic coating apparatus.
  • Electrostatic coating technology is a force that electrically adsorbs atomized paint to an object to be coated (work) by electrostatic force.
  • a rotary head commonly called "Bell Cup"
  • a rotary electrostatic coating apparatus equipped with a so-called This type of electrostatic coating device is applied to powder paints, insulating liquid paints (eg oil-based paints) and conductive liquid paints (eg water-based paints).
  • insulating liquid paints eg oil-based paints
  • conductive liquid paints eg water-based paints.
  • electrostatic coating apparatus for insulating paint a method of charging a paint by applying a high voltage to a rotary head is typically adopted.
  • electrostatic coating equipment for conductive paints a method is adopted in which a high voltage is applied to the external electrodes installed outside the coating equipment to charge the paint.
  • Patent Document 1 points out the problem that when the amount of shaving air is increased, the width of the coating pattern becomes smaller, and in order to improve this, the shaving air is discharged with an inclination around the rotational axis of the rotary head. Propose that. Although the detailed description is omitted by using Patent Document 1 here, the reason why the coating pattern width decreases as the amount of shaving air increases is due to the negative pressure generated in the front area of the rotary head. As a result of the negative pressure, the shaving air is attracted inward, resulting in a smaller coating pattern width.
  • Patent Document 1 forms shaving air of a spiral airflow by discharging shaving air in a direction inclined around the rotation axis of the rotating head. They have proposed to reduce the influence of the negative pressure by the centrifugal force of the spiral air flow or to cancel the influence of the negative pressure to expand the coating pattern width.
  • Patent Document 1 improves the finish quality (brightness) of metallic coating when metallic coating including aluminum flake mica and the like is performed using a rotary electrostatic coating apparatus. Therefore, it is effective when increasing the amount of shaving air.
  • the coating pattern width is fixed, so that, for example, when painting a narrow part such as an automobile pillar, It points out that there are problems such as paint loss due to spraying, and proposes an improvement plan.
  • Patent Document 2 describes the outer periphery of the rotating head proposed in Patent Document 1 in addition to the discharge of shaving air (first shaving air) in a direction inclined about the rotation axis of the rotary head.
  • the second shaving air is discharged to the side, and this second shaving air is collided with the first shaving air to reduce the paint pattern width.
  • Patent Document 3 does not discharge shaving air inclined around the rotation axis of the rotary head as in Patent Documents 1 and 2, but discharges shaving air toward the conical outer peripheral surface of the rotary head.
  • the pattern control air be discharged to the outer periphery of the shaving air, and that the pattern pattern air collide with the shaving air to narrow the paint pattern width!
  • Patent Document 1 Japanese Patent Laid-Open No. 3-101858
  • Patent Document 2 JP-A-7-24367
  • Patent Document 3 USP6, 991,178
  • the present invention is intended to improve the problem that the coating pattern width becomes constant when the shaving air is discharged around the rotation axis of the rotary head as disclosed in Patent Document 1. Say it.
  • a further object of the present invention is to provide a rotary electrostatic coating apparatus capable of varying the coating pattern width.
  • a rotary electrostatic coating apparatus that has a rotating head that scatters paint outward in the radial direction, and sprays the paint discharged from the outer peripheral edge of the rotating head toward the object by shaving air.
  • the shaving air is discharged while being inclined around the rotation axis of the rotary head, and the pattern control air is discharged adjacent to the shaving air on the outer peripheral side of the shaving air.
  • the pattern control air force S is discharged inclining around the axis of the rotary head in the same direction as the discharging direction of the shaving air,
  • FIG. 1 is a conceptual configuration diagram of the present invention.
  • reference symbol L indicates a rotation axis of the rotary head.
  • the shaving air discharge port 1 is composed of a plurality of holes arranged on a first circumference 2 around the rotation axis L of the rotary head.
  • a pattern control air discharge port 3 is provided on the outer peripheral side of the first circumference 2, and the pattern control air discharge port 3 has a plurality of holes arranged on the second circumference 4 concentric with the first circumference 2. It consists of
  • arrow ⁇ indicates the direction of rotation of the rotary head.
  • the shaving air 5 discharged from the shaving air discharge port 1 inclined around the rotation axis L forms a first spiral air flow, which is indicated by a broken line in FIG.
  • a spiral air flow of the pattern control air 6 discharged from the pattern control air discharge port 3 is formed on the outer peripheral side of the spiral air flow of the shaping air 5.
  • the coating pattern width can be variably controlled by relatively increasing or decreasing the amount of pattern control air in relation to the amount of shaving air.
  • the coating pattern width can be changed by increasing / decreasing the amount of air of the shearing air 5. Therefore, in the present invention, the coating pattern width is controlled by controlling the air amount of the shaving air 5, the air amount of the pattern control air 6, and the relative air amount of the pattern control air 6 with respect to the shaving air 5. Can be variably controlled.
  • the spiral airflow direction of the shaving air 5 and the pattern control air 6 that rotate in the same direction is set to be opposite to the rotational direction A of the rotary head.
  • the turning directions of the shaving air 5 and the pattern control air 6 may be the same as the rotation direction A of the rotary head.
  • the rotary electrostatic coating apparatus of the present invention is frequently used for painting an automobile body and is installed in a painting robot V, and painting is performed by automatic control. Accordingly, it is possible to reduce the waste of paint due to overspray by performing the above-described control and changing the paint pattern width according to the paint location.
  • the rotary electrostatic coating apparatus according to the present invention can be applied to various types of electrostatic coating apparatuses suitable for liquid paints and powder paints, and various statics suitable for insulating paints and conductive paints. It can be applied to electropainting equipment.
  • the present invention can also be suitably applied to metallic liquid paints that preferably increase the amount of shaving air.
  • FIG. 1 is a basic conceptual diagram of the present invention.
  • FIG. 2 is an explanatory view of the electrostatic coating apparatus of the first embodiment, and is a perspective view of the front end portion as seen from an oblique forward force.
  • FIG. 3 is an explanatory view of the electrostatic coating apparatus of the first embodiment, similar to FIG. 2, and a side view of the tip portion thereof.
  • FIG. 4 is an explanatory view of the electrostatic coating apparatus of the first embodiment, similar to FIG. 2, and a sectional view of the tip portion thereof.
  • FIG. 5 is a view for explaining a first modified example and is a cross-sectional view corresponding to FIG.
  • FIG. 6 is a view for explaining a second modification, and is a cross-sectional view corresponding to FIG.
  • FIG. 7 is a diagram for explaining a third modification, and is a cross-sectional view corresponding to FIG. 4.
  • FIG. 8 is a view for explaining a fourth modification, and is a cross-sectional view corresponding to FIG. 4.
  • FIG. 9 is a diagram for explaining a fifth modification, and is a cross-sectional view corresponding to FIG. 4.
  • FIG. 10 is a view for explaining the second embodiment and is a cross-sectional view corresponding to FIG.
  • the rotary electrostatic coating apparatus 10 shown in the figure has a bell cup 12 that is rotated by an air motor built in the apparatus main body 11 as in the prior art.
  • the paint is supplied to the central portion of the bell cup 12, travels radially outward along the inner surface of the bell cup 12, and then is discharged from the outer peripheral edge 12 a of the bell cup 12.
  • L indicates the rotation axis of the bell cup 12 as described above
  • the arrow A indicates the rotation direction of the bell cup 12.
  • a shaving air discharge port 1 and a pattern control air discharge port 3 are provided behind the outer peripheral edge 12a of the bell cup 12.
  • reference numeral 13 is a ring-shaped space for shaving air
  • 14 is a ring-shaped space for pattern control air.
  • the ringing space for shaping air 13 and the ring-shaped space for pattern control air 14 are formed at the tip of the apparatus main body 11. Pressurized air is supplied from the first air source 16 to the ring-shaped space 13 for shaving air through the first air supply path 15.
  • pressurized air is supplied from the second air source 18 through the second air supply path 17. Supplied.
  • the first air source 16 and the second air source 18 may be a common air source 22 (for example, FIG. 5).
  • a first control valve 19 and a second control valve 20 are interposed in the first air supply path 15 and the second air supply path 17, respectively.
  • the first and second control valves 19 and 20 are controlled.
  • the amount of air supplied to the ring-shaped space 13 for shaving air and the ring-shaped space 14 for pattern control air is adjusted by a signal transmitted from the panel 21.
  • the shaving air discharge port 1 formed on the end face of the apparatus main body 11 and the pattern control air discharge port 3 formed on the outer peripheral side thereof have a discharge direction as described with reference to FIG. Inclined around the rotation axis L of the bell cup 12 ( ⁇ , ⁇ in FIG. 1) 0
  • the shaving air discharge port 1 is connected to the rotation axis L of the bell cup 12. It is composed of a plurality of holes arranged on a central circle, and a large number of small holes in the illustrated example.
  • the pattern control air outlet 3 has a plurality of holes arranged on a circumference (reference numeral 4 in FIG. 1) having a larger diameter than the circumference of the shaving air outlet 1 (reference numeral 2 in FIG. 1). It is composed of small holes.
  • the shaving air discharge port 1 and the pattern control air discharge port 3 may be inclined in the same direction as the rotation direction ⁇ of the bell cup 12, but as shown in FIG. Is preferably inclined in the opposite direction. Also, as described with reference to FIG. 1, the inclination angle ⁇ of the shaving air discharge port 1 is set to an absolute value smaller than the inclination angle ⁇ of the pattern control air discharge port 3. In other words, the inclination angle / 3 of the pattern control air discharge port 3 has a larger absolute value than the inclination angle ⁇ of the shaving air discharge port 1 (I / 3I> I ⁇ I).
  • the directing directions of the shaving air discharge port 1 and the pattern control air discharge port 3 are both parallel to the rotation axis L of the bell cup 12,
  • the shaving air discharge port 1 is directed toward the outer peripheral edge 12a of the bell cup 12.
  • the shaving air discharged from the shaving air discharge port 1 sprays the paint toward the object to be coated (not shown) arranged in front of the bell cup 12, that is, the object is coated with the shaving air. It also has the function of atomizing the liquid paint released from the outer peripheral edge 12a of the bell cup 12 just by pointing it to.
  • the rotary electrostatic coating apparatus 10 of the first embodiment is preferably applied to a liquid paint, Applied to automotive body metallic paint. While the car body is being painted, the control of the first and second control valves 19 and 20 is executed. By adjusting the width of the paint pattern, the roof and other parts are relatively wide! By forming a coating pattern width suitable for the coating part, such as a relatively narrow !, it is possible to reduce overspray especially at a relatively narrow coating part such as a pillar.
  • the rotary electrostatic coating apparatus 10 of the first embodiment described above may be configured as a rotary electrostatic coating apparatus 30 as a modification shown in FIG. That is, in the rotary electrostatic coating apparatus 10 of the first embodiment, the shaving air ring-shaped space 13 and the pattern control air ring-shaped space 14 are applied from independent first and second air sources 16 and 18. Although compressed air is supplied, as shown in FIG. 5, pressurized air is supplied from a common air source 22 to the ring-shaped space 13 for shaving air and the ring-shaped space 14 for pattern control air. May be.
  • the inclination angle / 3 of the pattern control air discharge port 3 is set to an absolute value larger than the inclination angle ⁇ of the shaving air discharge port 1
  • the pattern control air discharge port 3 has the same directivity direction as that of the shaving air discharge port 1 in the same manner as in the first embodiment.
  • the shaving air discharge port 1 is directed toward the conical outer peripheral surface 12b of the bell cup 12 !.
  • the directivity direction of the pattern control air discharge port 3 is different from that of the electrostatic coating device 30 of the first modification (FIG. 5).
  • the directing direction of the air discharge port 3 is set so that the shaving air 5 discharged from the shaving air discharge port 1 is parallel to the center line of the shaving air 5 after being deflected by the outer peripheral edge 12a of the bell cup 12. Yes.
  • the rotary electrostatic coating apparatus 50 of the third modification shown in FIG. 7 differs from the first embodiment (FIG. 4) in that the directing direction of the shaving air discharge port 1 is directed to the outer peripheral edge 12a of the bell cup 12. Although common, the directing direction of the shaving air outlet 1 is not parallel to the rotation axis L. It is set to have an elevation angle (+ ⁇ ) with respect to an axis L ′ parallel to the rotational axis L of the bell cup 12.
  • the directing direction of the shaving air outlet 1 is relative to the axis L ′ parallel to the rotational axis L. It is set so that the dip angle ( ⁇ ) is obtained.
  • the directing direction of the shaving air outlet 1 is such that the shaving air 5 is inserted into the outer peripheral edge 12a of the bell cup 12.
  • the directing direction of the shaving air discharge port 1 may be directed to the vicinity of the outer peripheral edge 12a of the bell cup 12 as in the rotary electrostatic coating apparatus 70 of the fifth modified example. Yes.
  • the shearing air 5 sprays the paint discharged from the outer peripheral edge 12a of the bell cup 12 toward the object to be coated. At the same time, it has the function of atomizing the paint released from the outer peripheral edge 12a of the bell cup 12.
  • the rotary electrostatic coating apparatus 80 of the second embodiment of FIG. 10 does not have a function for the shaver 5 to atomize the paint released from the outer peripheral edge 12a of the bell cup 12. It has only the function of directing the to the object to be coated. Even in the electrostatic coating apparatus 80 of the second embodiment, the shaving air discharge port 1 and the pattern control air discharge port 3 may be inclined in the same direction as the rotation direction A of the bell cup 12.
  • the inclination angle 0 of the pattern control air discharge port 3 is set to an absolute value larger than the inclination angle ⁇ of the shaving air discharge port 1 (I / 3I > I ⁇ I) 0
  • the pattern control air 6 is located on the outer peripheral side of the spiraling swirling air 5 and swirls in the same direction as the shaving air 5.
  • the coating pattern width can be variably controlled by increasing or decreasing the relative air amount and by increasing or decreasing the air amount of the shaving air 5.

Landscapes

  • Electrostatic Spraying Apparatus (AREA)

Abstract

Appareil de revêtement rotatif électrostatique capable de commander de façon variable une largeur de motif de revêtement. Des ouvertures (1) de refoulement d'air de mise en forme sont disposées sur un premier cercle (2) autour de l'axe L de rotation d'une tête rotative, et des ouvertures (3) de refoulement d'air de contrôle du motif sont formées du côté extérieur des ouvertures de refoulement d'air de mise en forme. Les ouvertures (1) de refoulement d'air de mise en forme et les ouvertures (3) de refoulement d'air de contrôle du motif sont inclinées autour de l'axe L de rotation, de sorte que l'air (5) de mise en forme et l'air (6) de contrôle du motif sont des écoulements d'air hélicoïdaux présentant la même direction de tourbillon. L'angle β d'inclinaison de l'air (6) de contrôle du motif est supérieur en valeur absolue à l'angle α d'inclinaison de l'air (5) de mise en forme.
PCT/JP2007/069210 2006-10-06 2007-10-01 Appareil de revêtement rotatif électrostatique WO2008044527A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA2665181A CA2665181C (fr) 2006-10-06 2007-10-01 Appareil de revetement rotatif electrostatique
EP07828950.1A EP2058053A4 (fr) 2006-10-06 2007-10-01 Appareil de revetement rotatif electrostatique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006275475A JP2008093521A (ja) 2006-10-06 2006-10-06 回転式静電塗装装置
JP2006-275475 2006-10-06

Publications (1)

Publication Number Publication Date
WO2008044527A1 true WO2008044527A1 (fr) 2008-04-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/069210 WO2008044527A1 (fr) 2006-10-06 2007-10-01 Appareil de revêtement rotatif électrostatique

Country Status (6)

Country Link
EP (1) EP2058053A4 (fr)
JP (1) JP2008093521A (fr)
CN (1) CN101573184A (fr)
CA (1) CA2665181C (fr)
TW (1) TW200900157A (fr)
WO (1) WO2008044527A1 (fr)

Families Citing this family (17)

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FR2917309B1 (fr) * 2007-06-13 2013-10-25 Sames Technologies Projecteur rotatif de produit de revetement et installation comprenant un tel projecteur.
JP5361251B2 (ja) * 2008-06-02 2013-12-04 旭サナック株式会社 回転霧化塗装機
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
CN103097034B (zh) * 2010-09-09 2015-07-15 丰田自动车株式会社 旋转雾化涂装装置
JP2012115736A (ja) * 2010-11-29 2012-06-21 Toyota Motor Corp 回転霧化塗装装置および回転霧化塗装装置による塗装方法
JP5733996B2 (ja) * 2011-01-27 2015-06-10 本田技研工業株式会社 回転霧化式塗装装置
US8794177B2 (en) 2011-08-12 2014-08-05 Honda Motor Co., Ltd. Coating method and coating apparatus
JP5826662B2 (ja) * 2012-02-15 2015-12-02 トヨタ自動車株式会社 回転霧化式静電塗装機
JP5829555B2 (ja) * 2012-03-07 2015-12-09 本田技研工業株式会社 静電塗装装置及び静電塗装方法
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
US10343179B2 (en) 2015-06-03 2019-07-09 Honda Motor Co., Ltd. Painting device
JP6319233B2 (ja) * 2015-08-28 2018-05-09 トヨタ自動車株式会社 静電微粒化式塗装装置及び塗装方法
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
WO2021181833A1 (fr) * 2020-03-10 2021-09-16 本田技研工業株式会社 Dispositif de peinture électrostatique de type à atomisation rotative et élément d'aération pour celui-ci
WO2022260664A1 (fr) * 2021-06-09 2022-12-15 Carlisle Fluid Technologies, Inc. Atomiseur électrostatique

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JPH07256156A (ja) * 1994-03-25 1995-10-09 Toyota Motor Corp 回転霧化静電塗装装置
JPH0884941A (ja) * 1994-07-22 1996-04-02 Nissan Motor Co Ltd 回転霧化静電塗装方法および装置
JPH1076190A (ja) * 1996-09-05 1998-03-24 Abb Ind Kk 回転霧化頭型塗装機
US6991178B2 (en) 2003-01-24 2006-01-31 Dürr Systems, Inc. Concentric paint atomizer shaping air rings

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JPH03101858A (ja) * 1989-09-13 1991-04-26 Toyota Motor Corp 回転霧化塗装装置
JPH07256156A (ja) * 1994-03-25 1995-10-09 Toyota Motor Corp 回転霧化静電塗装装置
JPH0884941A (ja) * 1994-07-22 1996-04-02 Nissan Motor Co Ltd 回転霧化静電塗装方法および装置
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Also Published As

Publication number Publication date
EP2058053A4 (fr) 2014-04-23
TW200900157A (en) 2009-01-01
CA2665181A1 (fr) 2008-04-17
CA2665181C (fr) 2013-06-11
CN101573184A (zh) 2009-11-04
EP2058053A1 (fr) 2009-05-13
JP2008093521A (ja) 2008-04-24

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