WO2006016709A1 - 静電塗装用スプレーガン及び静電塗装方法 - Google Patents
静電塗装用スプレーガン及び静電塗装方法 Download PDFInfo
- Publication number
- WO2006016709A1 WO2006016709A1 PCT/JP2005/014971 JP2005014971W WO2006016709A1 WO 2006016709 A1 WO2006016709 A1 WO 2006016709A1 JP 2005014971 W JP2005014971 W JP 2005014971W WO 2006016709 A1 WO2006016709 A1 WO 2006016709A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- paint
- spray gun
- electrostatic coating
- voltage
- electrode
- Prior art date
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
- B05B5/053—Arrangements for supplying power, e.g. charging power
- B05B5/0533—Electrodes specially adapted therefor; Arrangements of electrodes
-
- 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
- B05B5/03—Discharge apparatus, e.g. electrostatic spray guns characterised by the use of gas, e.g. electrostatically assisted pneumatic spraying
-
- 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
-
- 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
- B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
- B05B7/0807—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets
- B05B7/0815—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets with at least one gas jet intersecting a jet constituted by a liquid or a mixture containing a liquid for controlling the shape of the latter
Definitions
- the present invention relates to a handheld general-purpose electrostatic coating spray gun in which a highly conductive coating such as a water-based coating is electrostatically coated, and an electrostatic coating method thereof.
- the electrostatic coating method has been used for a long time with the advantages of improving paint application efficiency, saving resources and reducing environmental pollution.
- the painting method There are two types of charging methods for charging high-voltage static electricity to the paint and promoting the application to the object to be coated. There are direct charge method and indirect charge method force S. Direct charge method is on the paint side. This method charges high voltage, and many have been used for paints with high electrical resistance. However, in the direct charging method, the paint
- the indirect charging method is a method in which a charged electrode is provided at a position distant from the paint system, and the sprayed paint particles are charged by the discharge from the electrode.
- the electrode is provided outside the spray gun. Is arranged. Therefore, regardless of the conductivity of the paint
- the paint side is grounded and the charged electrode is By placing it outside the playgun, what is called an external electrode / external charging is common, such as JP-A 2 0 0 4 — 1 4 8 2 3 9.
- an external electrode / external charging is common, such as JP-A 2 0 0 4 — 1 4 8 2 3 9.
- the externally provided electrodes have been downsized to improve operability, but this is not sufficient depending on the usage situation, and there is still room for improvement.
- Another method of indirect charging is disclosed in Japanese Patent Laid-Open No. 20 0 3 — 2 3 6 4 1 5, etc.
- the charging of the paint particles by ionized air is the main, the charging of the paint, There is a limit to the formation of an electric field on the paint, which is not sufficient.
- Discharge from the charged electrode to the ground potential varies depending on the 0 distance between the two electrodes and the electrode shape, etc. In general, if the distance is close, discharge occurs at a low voltage, and glow discharge or spark discharge occurs. In the case of electrostatic coating, this type of discharge can cause ignition and explosion, which is not only dangerous but also inefficient for air ionization and must be avoided. For this reason, a high ionization region is formed between the charged electrode and the counter electrode placed at a ground potential of 5 in order to charge the spray paint particles, and the spray paint particles are passed through the high ionization region and charged efficiently.
- the direct method uses a method of discharging to the grounding member on the nozzle side of the spray gun with a distance in consideration of safety.
- the present invention is a spray gun to be used for electrostatic coating using highly conductive paints such as water-based paints, which is less burdensome for the operator, is small and lightweight, and can be used safely in use.
- the objective is to provide a spray gun for electrostatic painting. Furthermore, the optimal installation conditions and charging means of the charged electrode are solved, and the electrostatic coating effect is obtained with a much lower voltage than before, thereby saving resources and reducing environmental pollution. It is in.
- electrostatic coating increases the coating efficiency as the voltage is increased, but because the danger increases, the specifications have been determined as described above as the range that can be adopted industrially. .
- Low voltage not only increases safety against the use of high pressure, but also enables high voltage generators to be smaller and lighter, leading to improved workability, which is the most important issue for workers.
- the challenge is to provide a spray gun for electrostatic coating to achieve the required coating efficiency and to reduce the charged voltage, which leads to many advantages, such as making this easy
- the present invention includes an atomizing device at the tip, sprays paint discharged from a paint nozzle disposed in the center of the atomizing device, and applies r3 ⁇ 4 J earth static electricity to the sprayed paint particles to the object to be coated. Paint
- the structure was such that excessive discharge to the ground potential was suppressed by the airflow ejected from the five paths.
- the charged electrode is located outside the gS: gable center port in the air cuff, and the tip is exposed on the front surface of the air cap, so that the spray gun operation or spray state is not hindered.
- a detachable air cap is provided with a contact portion facing the high voltage output section exposed at the front end of the spray gun body, and an electric conduction path is formed between the high voltage output section and the load electrode. If you change the direction of spraying from vertical to side blowing by rotating the air cap halfway,
- a compressed air flow path is formed between the charged electrode supplied from the JiL.
- the charged electrode was charged by setting or adjusting so as to maintain a high voltage in the range of more than 5 kV and 10 kV, and electrostatic spray coating was performed.
- the high voltage charged to the charged electrode is discharged toward the counter electrode on the closest paint side, that is, the ground potential, but the air cap is used.
- the discharge current is suppressed by the compressed air from the center port of the head, and the drop of the tip voltage is prevented. This is about 1 Z 2 compared to when compressed air is stopped. Therefore, even if the supply voltage is set low, the necessary peak voltage can be maintained and a high ionization region can be formed, so that the high voltage to be supplied can be reduced, and the high voltage generator can be reduced in size and weight.
- FIG. 1 is a schematic configuration diagram of a spray gun for electrostatic coating showing an embodiment of the present invention.
- FIG. 2 is a partial cross-sectional view showing a tip atomizing device and a charging electrode portion of the spray gun of FIG.
- FIG. 3 (a) shows another implementation where the position of the charged electrode is changed.
- An example of a front view of an atomizing device section is shown, and
- FIG. 3 (b) is a partial sectional view thereof.
- Fig. 4 is a graph showing the relationship between the voltage applied to the charged electrode and the tip voltage.
- FIG. 1 shows the overall configuration of an air atomizing hand-held electrostatic spray gun.
- an electrostatic spray gun 1 is composed of a gun body 3 having an atomizing device 2 at the front end and a handle 4 extending below the rear of the gun body 3.
- the main body 3 is formed of an insulating material, and the handle 4 is covered with the force formed by the conductive material or the conductive material and connected to the ground potential.
- a high voltage generator 5 is built in the gun body 3 and its output side is connected to a charging electrode 6 (described later) via a connection line 8.
- the power is supplied from the external high-frequency low-voltage power supply 7 through the power cable 7a, but is not limited to this.
- an air passage 9 is formed in the gun body 3 through the handle 4 to eject compressed air from the air cap 2 ⁇ of the atomizer 2, and the paint is a container 1 that is at ground potential. From 0, the supply device 1 1 sprays through the paint passage 1 2 and then through the paint nozzle 2 5.
- the spray gun is equipped with a spray of paint, a spray of atomized air, a trigger for charge control, an adjustment device, etc. so that the fogging operation can be performed. This is a well-known configuration in many examples, and details are omitted here.
- the atomizing device 2 at the tip of the spray gun is formed of an insulating material and is attached to the tip of the gun body 3.
- a spout P 2 6 is provided at the center of the attached material Nos. 25, and a two-dollar valve 27 is provided in the interior so as to be able to advance and retreat as a means to control the spraying and stopping of paint o Paint nozzle 2
- Each empty P 2 3 is fed with compressed air supplied from the air passage 9 on the side of the main body 3 of the HIJ blade.
- the paint outlet 2 6 of the paint nose 2 5 is supplied from the paint passage 1 2.
- O 1 2 a is the paint joint connecting gun body 3 and paint passage 1 2 0
- the charged electrode 6 to which the same pressure is supplied 7PR is placed outside the central space P 21 on the surface of the air cap 20 and is formed into a pattern forming air.
- the electrode 6 is connected to the output terminal of the high voltage generator 5 and directly connected to the connection terminal 3 1 and the charging terminal 3 2.
- the charging terminal 3 2 side has a tendency to displace back and forth, and the connection terminal 3 1 side is maintained at least by the rotation of the air cap 20. It is provided in a rotation range of 0 degree or more. It is desirable that these terminals are designed to reduce the capacitance, and each terminal structure may be provided on either terminal side.
- the connection terminal 31 side may be displaced back and forth to have sporadic properties, and the charged electrode 32 side may be maintained in a rotation range of 90 degrees or more.
- the ground potential that becomes the charged electrode and the counter electrode is placed at the paint outlet 26, and the method of setting the paint passage itself to the ground potential, The tip of the needle valve 2 7
- the P 2 6 is made of a conductive material and connected to the ground potential.
- the metal wire 2 7 E is incorporated only at the tip of the double dollar valve 2 7 Consistently to be
- the charged electrode is provided on the inner surface of the air cap 20 where the pattern forming space P 2 3 force s is provided. In any case, it opposes the position where the compression air is sprayed between the paint flow coming out from the center.
- a plurality of the W 3 ⁇ 4 and 3 poles 6 are provided in the opposite ilL position as shown in the figure, so that a uniform charging effect can be achieved.
- the trigger operation causes the compression air to be ejected from the air cap 20 and then the paint to be ejected and atomized. Power is blown. - ⁇ _ They are the same as normal air spray guns
- the high voltage to the charged electrode 6 is the limiting resistor 3
- the peak voltage can be maintained around 7 kV. This is because the ionization voltage necessary to obtain the electrostatic coating effect by satisfying the ionization electrode in the vicinity of the nebulization zone satisfies the following requirements. It is a value that can be obtained.
- the loading electrode 6 is placed close to the ground potential, maintained in the range of the Rona discharge by the high voltage charge, and the voltage is lowered so that the glow discharge does not occur. Paint passage that is potential ⁇ Virtually 21 dollar valve 2 7 tip ⁇ ⁇
- the charged voltage varies depending on the shape and arrangement of the electrode, but it is known that the discharge current from the electrode by electrostatic coating is 10 to 100) H k, and usually 1 O k per 1 O mm If it exceeds V or exceeds this level, a glow discharge in the air will occur, causing not only danger of ignition and ignition, but also high current flows and the tip charge voltage itself decreases, resulting in ionization.
- the electrostatic effect cannot be obtained. In the case of the present invention, it exceeds 5 kV in a state in which a jet of compressed air of 100 to 400 kPa, which is generally used, is injected from a compressed air flow path disposed between electrodes. 0
- the charge that maintains a high voltage in the kV range enables safe and extremely efficient charging despite the charged electrode approaching the fog region.
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/659,714 US20080213499A1 (en) | 2004-08-11 | 2005-08-10 | Electrostatic Coating Spray Gun and Electrostatic Coating Method |
EP05772381A EP1800756A4 (en) | 2004-08-11 | 2005-08-10 | ELECTROSTATIC COATING SPRAY GUN AND ELECTROSTATIC COATING METHOD |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-234040 | 2004-08-11 | ||
JP2004234040A JP2006051427A (ja) | 2004-08-11 | 2004-08-11 | 静電塗装用スプレーガン及び静電塗装方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006016709A1 true WO2006016709A1 (ja) | 2006-02-16 |
Family
ID=35839456
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/014971 WO2006016709A1 (ja) | 2004-08-11 | 2005-08-10 | 静電塗装用スプレーガン及び静電塗装方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20080213499A1 (ja) |
EP (1) | EP1800756A4 (ja) |
JP (1) | JP2006051427A (ja) |
CN (1) | CN100460084C (ja) |
WO (1) | WO2006016709A1 (ja) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0625127D0 (en) * | 2006-12-18 | 2007-01-24 | Ici Ltd | Electrostatic paint spray device |
JP2010284618A (ja) * | 2009-06-15 | 2010-12-24 | Asahi Sunac Corp | 塗装装置 |
US8893990B2 (en) | 2010-02-26 | 2014-11-25 | Finishing Brands Holdings Inc. | Electrostatic spray system |
JP5787223B2 (ja) | 2011-09-20 | 2015-09-30 | いすゞ自動車株式会社 | 静電塗装方法及び静電塗装用ガン |
WO2013132594A1 (ja) * | 2012-03-06 | 2013-09-12 | 旭サナック株式会社 | 静電塗装用スプレー装置 |
US8978759B2 (en) | 2012-08-28 | 2015-03-17 | Halliburton Energy Services, Inc. | Electrostatic particulate coating methods and apparatus for fracturing fluids |
CN104718028B (zh) * | 2012-10-01 | 2017-10-24 | 固瑞克明尼苏达有限公司 | 用于静电喷枪的喷嘴梢组件 |
US20150231652A1 (en) * | 2012-10-01 | 2015-08-20 | Graco Minnesota, Inc. | Grounding rods for electrostatic spray |
EP3753637B1 (en) | 2014-09-04 | 2023-11-01 | Octet Medical, Inc. | Electrostatic fluid delivery system |
US10166557B2 (en) | 2015-03-03 | 2019-01-01 | Carlisle Fluid Technologies, Inc. | Electrostatic spray tool system |
WO2017112781A1 (en) * | 2015-12-21 | 2017-06-29 | Victory Innovations Company | Electrostatic fluid delivery backpack system |
CN110918281A (zh) * | 2018-09-03 | 2020-03-27 | 七星瓢虫环境科技(苏州)有限公司 | 静电喷漆枪及其使用方法 |
JP6782871B1 (ja) * | 2019-05-31 | 2020-11-11 | 花王株式会社 | 静電噴出装置 |
JP6782817B1 (ja) * | 2019-05-31 | 2020-11-11 | 花王株式会社 | 静電スプレー装置およびカートリッジ |
CN112170031A (zh) * | 2020-08-12 | 2021-01-05 | 江苏大学 | 一种具有复合可调荷电模式的便携式静电喷雾装置 |
CN113272073B (zh) * | 2020-10-16 | 2022-07-29 | 烟台杰瑞石油装备技术有限公司 | 静电喷雾装置 |
CN213996362U (zh) * | 2020-10-16 | 2021-08-20 | 杰瑞华创科技有限公司 | 一种便携式喷雾设备 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH03127653A (ja) * | 1989-10-09 | 1991-05-30 | Honda Motor Co Ltd | 静電塗装方法及び静電塗装装置 |
JPH04176350A (ja) * | 1990-11-09 | 1992-06-24 | Ransburg Automot Kk | スプレーガン式静電塗装装置 |
JPH0947695A (ja) * | 1995-08-08 | 1997-02-18 | Nissan Motor Co Ltd | エアスプレーガン |
JP2003236415A (ja) * | 2002-02-18 | 2003-08-26 | Asahi Sunac Corp | 静電塗装ガン |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
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DE1546838A1 (de) * | 1964-08-17 | 1969-10-23 | Hans Behr | Vorrichtung zum wahlweisen Zerstaeuben und Auftragen verschiedener Stoffe |
DE2446022C3 (de) * | 1974-09-26 | 1985-10-24 | ESB Elektrostatische Spritz- und Beflockungsgesellschaft G.F. Vöhringer GmbH, 7758 Meersburg | Vorrichtung zum elektrostatischen Beschichten von Gegenständen mit flüssigem oder pulverförmigem Beschichtungsmaterial |
GB2020200B (en) * | 1978-03-08 | 1982-09-15 | Air Ind | Electrostatic spraying |
US5531832A (en) * | 1985-11-07 | 1996-07-02 | Burford Corporation | Nozzle assembly for pan oiler |
DE3863562D1 (de) * | 1987-03-23 | 1991-08-14 | Behr Industrieanlagen | Vorrichtung zum elektrostatischen beschichten von werkstuecken. |
DE3709510A1 (de) * | 1987-03-23 | 1988-10-06 | Behr Industrieanlagen | Verfahren zur betriebssteuerung einer elektrostatischen beschichtungsanlage |
US5647543A (en) * | 1995-01-31 | 1997-07-15 | Graco Inc | Electrostatic ionizing system |
DE19511255A1 (de) * | 1995-03-27 | 1996-10-02 | Gema Volstatic Ag | Elektrostatische Sprühbeschichtungseinrichtung |
US5863497A (en) * | 1996-03-11 | 1999-01-26 | The Proctor & Gamble Company | Electrostatic hand sanitizer |
JP4989014B2 (ja) * | 2000-09-29 | 2012-08-01 | グラコ ミネソタ インコーポレーテッド | 静電スプレーガン |
JP3749890B2 (ja) * | 2002-10-31 | 2006-03-01 | アネスト岩田株式会社 | 外部帯電式静電塗装スプレーガン |
JP3866182B2 (ja) * | 2002-10-31 | 2007-01-10 | アネスト岩田株式会社 | 静電塗装ガン及びその外部帯電電極 |
-
2004
- 2004-08-11 JP JP2004234040A patent/JP2006051427A/ja active Pending
-
2005
- 2005-08-10 CN CNB2005800301440A patent/CN100460084C/zh not_active Expired - Fee Related
- 2005-08-10 US US11/659,714 patent/US20080213499A1/en not_active Abandoned
- 2005-08-10 WO PCT/JP2005/014971 patent/WO2006016709A1/ja active Application Filing
- 2005-08-10 EP EP05772381A patent/EP1800756A4/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03127653A (ja) * | 1989-10-09 | 1991-05-30 | Honda Motor Co Ltd | 静電塗装方法及び静電塗装装置 |
JPH04176350A (ja) * | 1990-11-09 | 1992-06-24 | Ransburg Automot Kk | スプレーガン式静電塗装装置 |
JPH0947695A (ja) * | 1995-08-08 | 1997-02-18 | Nissan Motor Co Ltd | エアスプレーガン |
JP2003236415A (ja) * | 2002-02-18 | 2003-08-26 | Asahi Sunac Corp | 静電塗装ガン |
Non-Patent Citations (1)
Title |
---|
See also references of EP1800756A4 * |
Also Published As
Publication number | Publication date |
---|---|
JP2006051427A (ja) | 2006-02-23 |
EP1800756A4 (en) | 2010-06-30 |
US20080213499A1 (en) | 2008-09-04 |
EP1800756A1 (en) | 2007-06-27 |
CN100460084C (zh) | 2009-02-11 |
CN101014415A (zh) | 2007-08-08 |
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