EP1084761A2 - Dispositif et procédé de peinture - Google Patents

Dispositif et procédé de peinture Download PDF

Info

Publication number
EP1084761A2
EP1084761A2 EP00119846A EP00119846A EP1084761A2 EP 1084761 A2 EP1084761 A2 EP 1084761A2 EP 00119846 A EP00119846 A EP 00119846A EP 00119846 A EP00119846 A EP 00119846A EP 1084761 A2 EP1084761 A2 EP 1084761A2
Authority
EP
European Patent Office
Prior art keywords
air
paint
positively
negatively charged
painter
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Withdrawn
Application number
EP00119846A
Other languages
German (de)
English (en)
Other versions
EP1084761A3 (fr
Inventor
Koichi Takeda
Haruji Maruyama
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.)
Himu Electro Co Ltd
Original Assignee
Himu Electro Co Ltd
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 Himu Electro Co Ltd filed Critical Himu Electro Co Ltd
Publication of EP1084761A2 publication Critical patent/EP1084761A2/fr
Publication of EP1084761A3 publication Critical patent/EP1084761A3/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • B05B7/24—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 with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2489—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 with means, e.g. a container, for supplying liquid or other fluent material to a discharge device an atomising fluid, e.g. a gas, being supplied to the discharge device
    • B05B7/2491—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 with means, e.g. a container, for supplying liquid or other fluent material to a discharge device an atomising fluid, e.g. a gas, being supplied to the discharge device characterised by the means for producing or supplying the atomising fluid, e.g. air hoses, air pumps, gas containers, compressors, fans, ventilators, their drives
    • 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
    • B05B7/24—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 with means, e.g. a container, for supplying liquid or other fluent material to a discharge device

Definitions

  • the invention relates to a painter and a method of painting, and more particularly to a painter and a method of painting in both of which static electricity is removed from air, and then, the air is mixed with a paint.
  • static electricity is generated by friction between different materials.
  • static electricity is already generated when a body of an automobile is puttied for pretreatment of painting.
  • static electricity is further accumulated in various polishing steps.
  • a bumper one of parts of an automobile, is composed of insulating material such as plastic, when a polishing step is applied to a bumper, the bumper is completely electrically charged after the polishing step has been finished.
  • a metallic-color paint contains a lot of quite small metal particles. Since those metal particles are electrically conductive, if static electricity is accumulated on a body of an automobile, the metal particles are attracted to the static electricity. As a result, there is generated non-uniformity in painting on a body of an automobile.
  • an object such as an automobile is painted by spraying a mixture of a paint and air thereto through a spray gun.
  • air sprayed through a spray gun is generally electrically charged.
  • air is electrically charged before sprayed through a spray gun, because of friction between air and an inner surface of the air tube. Since electrically charged air attracts ambient dusts, such dusts are resultingly adhered to an object to be painted with a paint.
  • the apparatus is comprised of a filter 1 which removed moisture and oil from compressed air, a paint tank 2 filled with a paint, a gun 3 spraying a mixture of a paint and air, a high pressure hose 4 making fluid communication between the filter 1 and the gun 3, and a shield cable 5.
  • the filter 1, the high pressure hose 4 and the shield cable 5 are arranged in a box 10.
  • a leakage transformer 6 as illustrated in Fig. 2 is also arranged in the box 10.
  • the leakage transformer 6 can raise a voltage supplied from a generally used AC power source up to about 7000 volts.
  • the leakage transformer 6 includes a 10M ⁇ -resistor 7, three capacitors 8, and three discharge needles 9 each electrically connected to each of the capacitors 8, at its high voltage terminal.
  • the discharge needles 9 are radially arranged in an outlet of the gun 3, and are arranged in facing relation to the high pressure hose 4 (not illustrated in Fig. 2).
  • the shield cable 5 includes a high-voltage terminal line and an earth terminal line, and extends from the gun 3 to the leakage transformer 6 arranged in the box 10.
  • the earth terminal line is electrically connected to a fixed terminal 12 through an earth line 11.
  • Static electricity accumulated on an object to be painted is neutralized with the ionized air. At the same time, dusts having been adhered to the object are blown out.
  • the above-mentioned apparatus is accompanied with a problem that since air sprayed through the gun 3 has been already electrically charged when sprayed, the air attracts ambient dusts before reaching an object to be painted, resulting in that those dusts are adhered to the object.
  • Japanese Utility Model Publication No. 3013762 has suggested an apparatus for removing static electricity, comprising a high voltage source, a tube in which ions are generated, a discharge needle arranged in the tube, opposing electrodes arranged in the tube, a high pressure tube for introducing compressed air into the tube, a gun through which a paint and air are sprayed, and a pressure control valve arranged in the gun.
  • the high voltage source has two output terminals one of which is electrically connected to the discharge needle, and the other is electrically connected to the opposing electrodes.
  • Japanese Unexamined Patent Publication No. 7-296985 has suggested an apparatus for vaporizing electrically conductive liquid.
  • the apparatus is comprised of an electrically insulating container containing electrically conductive liquid therein, and a high voltage source.
  • the electrically conductive liquid is vaporized, and at the same time, ionized while the high voltage source applies a high voltage to the electrically conductive liquid.
  • Japanese Unexamined Patent Publication No. 11-109069 has suggested an electronic device comprising a main case formed with a transparent window through which a person can see what is contained in the main case.
  • the main case and the window are both composed of the same transparent resin.
  • the main case is coated with a colored underlying coating and a transparent coating on the colored underlying coating, and the window is coated with the transparent coating.
  • Japanese Unexamined Patent Publication No. 7-18412 has suggested a method of treating a surface of a work, including the steps of spraying ionized gas to a surface of a work to thereby remove static electricity from the surface, radiating ultra-violet ray to the surface of the work to thereby clean the surface, and forming a thin film on the surface.
  • the present invention intends to overcome the above problems.
  • the object is solved by the painter according to independent claim 1 and the method of painting according to independent claim 5.
  • the present invention generally relates to a painter and a method for painting. In particular it relates to a painter and a method of painting in which static electricity is removed. More specifically, the present invention also relates to a painter and a method for painting in which neutralized air is mixed with paint.
  • a painter including (a) a static eraser which removes static electricity from air, (b) a tank containing a paint therein, and (c) a spray gun which mixes the paint with air supplied from the static eraser, and sprays the paint to an object, characterized by (d) a device located between the static eraser and the spray gun which device retains air therein, wherein positively or negatively charged ionized air supplied from the static eraser is retained in the device, positively charged ionized air is mixed with negatively charged ionized air in the device, and electrically neutral air is supplied from the device to the spray gun.
  • the inventors of the present invention had found out that it is more effective to spray electrically neutral air than to spray positively or negatively charged ionized air, as done in the conventional apparatus illustrated in Figs. 2 and 3, in order to prevent non-uniformity in painting. If air is electrically neutral, the air will not attract dusts thereto when sprayed to an object to be painted.
  • the present invention is based on this discovery.
  • the positively or negatively charged ionized air supplied from the static eraser is being accumulated in the device such as a tank, the positively charged air is combined with the negatively charged air, resulting in that air becomes electrically neutral.
  • the thus made electrically neutral air is sprayed through the spray gun together with a paint, ensuring non-uniformity in painting an object.
  • the device has a volume at least ten times greater than a volume of air discharged from the static eraser in a unit period of time.
  • the device had a too small volume, it would not be possible to facilitate positively and negatively charged ionized air supplied from the static eraser, to combine with each other.
  • the inventors had conducted the experiment to know how much volume the device had to have.
  • the device it was found out that if the device had a volume ten times greater than a volume of air to be discharged from the static eraser in a unit period of time, it was possible to facilitate the positively and negatively charged ionized air to combine with each other.
  • the device may be comprised of a tank for retaining air therein.
  • the device may be comprised of a hose such as a high pressure tube.
  • the positively charged air is combined with the negatively charged air, resulting in that air becomes electrically neutral.
  • the thus made electrically neutral air is sprayed through the spray gun together with a paint, ensuring non-uniformity in painting an object.
  • the positively and negatively charged ionized air is retained in a tank in the step (b).
  • the positively and negatively charged ionized air may be retained in a tube in the step (b).
  • the positively charged air supplied from the static eraser is being accumulated in the device such as a tank or a hose
  • the positively charged air is combined with the negatively charged air, resulting in that the air becomes electrically neutral.
  • the thus made electrically neutral air is sprayed through the spray gun together with a paint, ensuring non-uniformity in painting an object.
  • Fig. 3 illustrates a painter in accordance with the embodiment of the present invention.
  • a painter 20 in accordance with the embodiment is comprised of a static eraser 21 which removed static electricity from air, a paint tank 22 filled with a paint, a spray gun 23 in which air supplied from the static eraser 21 is mixed with a paint supplied from the paint tank 22, and which sprays the mixture of the air and paint, and a tank 24 located between the static eraser 21 and the spray gun 23 for retaining air therein.
  • the static eraser 21 in the embodiment may be comprised of the static eraser illustrated in Figs. 1 and 2.
  • the static eraser 21 is not to be limited to that. Any apparatus which can remove static electricity may be used as the static eraser 21 in the embodiment.
  • the tank 24 has a volume ten times greater than a volume of air discharged from the static eraser 21 in a unit period of time.
  • the painter 20 in accordance with the embodiment operates as follows.
  • Positively and negatively charged ionized air 25 supplied from the static eraser 21 is once retained in the tank 24.
  • the positively and negatively charged ionized air are combined with each other in the tank 24, resulting in that the air 25 is turned into electrically neutral ions 26.
  • the thus made electrically neutral ions 26 are fed to the spray gun 23, and sprayed to an object through the spray gun 23 together with a paint supplied from the paint tank 22.
  • the positively or negatively charged ionized air 25 supplied from the static eraser 21 can be turned into the electrically neutral ions 26 by once retaining the charged ionized air 25 in the tank 24.
  • the spray gun 23 By spraying the electrically neutral air 26 through the spray gun 23 together with a paint, it is possible to paint an object without non-uniformity in painting.
  • the device for retaining air therein is not to be limited to the tank 24. Any means can be used as the device, if the means had such a volume as to be able to combine positively and negatively charged ionized air supplied from the static eraser 21, to each other to thereby render the air electrically neutral.
  • a high pressure hose may be used in place of the tank 24, as the device for retaining air therein.

Landscapes

  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
  • Electrostatic Spraying Apparatus (AREA)
  • Elimination Of Static Electricity (AREA)
  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Nozzles (AREA)
EP00119846A 1999-09-17 2000-09-12 Dispositif et procédé de peinture Withdrawn EP1084761A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP26312499A JP2001079465A (ja) 1999-09-17 1999-09-17 塗装装置及び塗装方法
JP26312499 1999-09-17

Publications (2)

Publication Number Publication Date
EP1084761A2 true EP1084761A2 (fr) 2001-03-21
EP1084761A3 EP1084761A3 (fr) 2003-08-13

Family

ID=17385164

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00119846A Withdrawn EP1084761A3 (fr) 1999-09-17 2000-09-12 Dispositif et procédé de peinture

Country Status (7)

Country Link
EP (1) EP1084761A3 (fr)
JP (1) JP2001079465A (fr)
KR (1) KR20010050480A (fr)
CN (1) CN1288784A (fr)
CA (1) CA2319628A1 (fr)
SG (1) SG97936A1 (fr)
TW (1) TW473401B (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1320285A1 (fr) * 2001-12-11 2003-06-18 Girolamo Barbieri Méthode et dispositif de neutralisation des charges portées par un élément chargé électrostatiquement
EP1867392A2 (fr) * 2006-06-13 2007-12-19 APO GmbH Massenkleinteilbeschichtung Procédé et dispositif de revêtement superficiel de petites pièces
EP2486984A3 (fr) * 2011-02-11 2013-11-27 Thomas Mayer Procédé de traitement de l'air comprimé ainsi que dispositif de traitement de l'air comprimé
ITVI20120271A1 (it) * 2012-10-16 2014-04-17 Claudio Bettanin Impianto per la verniciatura a spruzzo
CN104368476A (zh) * 2014-11-10 2015-02-25 苏州特铭精密科技有限公司 一种uv漆喷涂生产线及其生产方法

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7665672B2 (en) 2004-01-16 2010-02-23 Illinois Tool Works Inc. Antistatic paint cup
US7086549B2 (en) 2004-01-16 2006-08-08 Illinois Tool Works Inc. Fluid supply assembly
US7165732B2 (en) 2004-01-16 2007-01-23 Illinois Tool Works Inc. Adapter assembly for a fluid supply assembly
US7766250B2 (en) 2004-06-01 2010-08-03 Illinois Tool Works Inc. Antistatic paint cup
US7757972B2 (en) 2004-06-03 2010-07-20 Illinois Tool Works Inc. Conversion adapter for a fluid supply assembly
US7353964B2 (en) 2004-06-10 2008-04-08 Illinois Tool Works Inc. Fluid supply assembly
CN103551268A (zh) * 2013-11-01 2014-02-05 杨义华 圆柱体喷漆机

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH039802A (ja) 1989-06-07 1991-01-17 Hakamada Seisakusho:Kk 円板カッターの基板の構造
JPH0313762A (ja) 1989-06-09 1991-01-22 Toshiba Corp 空気調和機
JPH0718412A (ja) 1993-07-06 1995-01-20 Alpine Electron Inc 表面処理方法および表面処理装置
JPH11109069A (ja) 1997-09-30 1999-04-23 Nec Saitama Ltd 電子機器

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3786309A (en) * 1973-01-12 1974-01-15 Gen Motors Corp Electrostatic powder spraying method and apparatus
DE3631270A1 (de) * 1986-09-13 1988-03-24 Kopperschmidt Mueller & Co Vorrichtung zur spruehbeschichtung von werkstuecken
US5032422A (en) * 1989-12-26 1991-07-16 Ball Corporation Electrostatically depositing and electrostatically neutralizing
EP0934776A1 (fr) * 1998-02-06 1999-08-11 AEA Technology plc Pistolet de pulvérisation avec commande simultanéedes soupapes de fluide et d'air

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH039802A (ja) 1989-06-07 1991-01-17 Hakamada Seisakusho:Kk 円板カッターの基板の構造
JPH0313762A (ja) 1989-06-09 1991-01-22 Toshiba Corp 空気調和機
JPH0718412A (ja) 1993-07-06 1995-01-20 Alpine Electron Inc 表面処理方法および表面処理装置
JPH11109069A (ja) 1997-09-30 1999-04-23 Nec Saitama Ltd 電子機器

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1320285A1 (fr) * 2001-12-11 2003-06-18 Girolamo Barbieri Méthode et dispositif de neutralisation des charges portées par un élément chargé électrostatiquement
EP1867392A2 (fr) * 2006-06-13 2007-12-19 APO GmbH Massenkleinteilbeschichtung Procédé et dispositif de revêtement superficiel de petites pièces
EP1867392A3 (fr) * 2006-06-13 2008-02-20 APO GmbH Massenkleinteilbeschichtung Procédé et dispositif de revêtement superficiel de petites pièces
EP2486984A3 (fr) * 2011-02-11 2013-11-27 Thomas Mayer Procédé de traitement de l'air comprimé ainsi que dispositif de traitement de l'air comprimé
DE102011011054B4 (de) 2011-02-11 2023-01-26 Thomas Mayer Verfahren zur Aufbereitung von Druckluft sowie Vorrichtung zur Aufbereitung von Druckluft
ITVI20120271A1 (it) * 2012-10-16 2014-04-17 Claudio Bettanin Impianto per la verniciatura a spruzzo
CN104368476A (zh) * 2014-11-10 2015-02-25 苏州特铭精密科技有限公司 一种uv漆喷涂生产线及其生产方法
CN104368476B (zh) * 2014-11-10 2017-03-22 苏州特铭精密科技有限公司 一种uv漆喷涂生产线及其生产方法

Also Published As

Publication number Publication date
JP2001079465A (ja) 2001-03-27
EP1084761A3 (fr) 2003-08-13
CN1288784A (zh) 2001-03-28
CA2319628A1 (fr) 2001-03-17
TW473401B (en) 2002-01-21
KR20010050480A (ko) 2001-06-15
SG97936A1 (en) 2003-08-20

Similar Documents

Publication Publication Date Title
EP1084761A2 (fr) Dispositif et procédé de peinture
US4544570A (en) Electrostatic high voltage isolation system with internal charge generation
WO2010019366A1 (fr) Procédé pour empêcher une tension de s'échapper d'une interface de fluide pour des applicateurs d'alimentation par gravité à base d'eau
US5807436A (en) Rotary electrostatic dusting apparatus and method
US20060283387A1 (en) Painter and method of painting
AU639046B2 (en) Method of electrostatically depositing smaller particles fir st
US5567468A (en) Method and apparatus for applying powder coatings to surfaces
WO2011152418A1 (fr) Procédé de peinture électrostatique et pistolet à peinture électrostatique
JP5854322B2 (ja) 静電塗装方法
JP2001079465A5 (fr)
AU635792B2 (en) Method and apparatus for electrostatically directing and depositing
DE69521335T2 (de) Verfahren und vorrichtung zur elektrostatischen lackierung von werkstücken aus dielektrischem material oder schlecht leitenden werkstücken
JP3424883B2 (ja) スプレーガン式静電塗装装置
KR102422816B1 (ko) 판금도장 방법
JP2004249171A (ja) 静電霧化装置及び静電霧化方法
JPH09239309A (ja) 構築物の外面静電塗装方法
JPS5939356A (ja) 線状体用静電塗布装置
JPS55111856A (en) Rotary type electrostatic painting device
JP3677636B2 (ja) 静電塗装缶およびその製造方法
JPS59102466A (ja) 中空絶縁物塗装装置
JP2000033325A (ja) 高硬度・高密度・消臭塗装方法
JPS59193164A (ja) 静電塗装装置
JPS5879568A (ja) 静電塗装方法
JPH04106655U (ja) 静電塗装装置
JPH04134450U (ja) 導電性塗料の静電塗装装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

RIC1 Information provided on ipc code assigned before grant

Ipc: 7B 05B 5/08 B

Ipc: 7B 05B 5/04 B

Ipc: 7B 05D 1/06 B

Ipc: 7B 05D 1/04 B

Ipc: 7B 05B 7/24 A

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20030401