EP1129785A2 - Revêtement électrostatique de bouteilles non conductrices - Google Patents

Revêtement électrostatique de bouteilles non conductrices Download PDF

Info

Publication number
EP1129785A2
EP1129785A2 EP00126918A EP00126918A EP1129785A2 EP 1129785 A2 EP1129785 A2 EP 1129785A2 EP 00126918 A EP00126918 A EP 00126918A EP 00126918 A EP00126918 A EP 00126918A EP 1129785 A2 EP1129785 A2 EP 1129785A2
Authority
EP
European Patent Office
Prior art keywords
conductive
electrode
coating
dispenser
container
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Withdrawn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
EP00126918A
Other languages
German (de)
English (en)
Other versions
EP1129785A3 (fr
Inventor
John P. Owed Jr.
John A. Bland Jr.
Joshua D. White
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.)
Illinois Tool Works Inc
Original Assignee
Illinois Tool Works Inc
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 Illinois Tool Works Inc filed Critical Illinois Tool Works Inc
Publication of EP1129785A2 publication Critical patent/EP1129785A2/fr
Publication of EP1129785A3 publication Critical patent/EP1129785A3/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • B05B5/057—Arrangements for discharging liquids or other fluent material without using a gun or nozzle
    • 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
    • B05B5/08—Plant for applying liquids or other fluent materials to objects
    • B05B5/087—Arrangements of electrodes, e.g. of charging, shielding, collecting electrodes

Definitions

  • the invention relates generally to electrostatic coating, and more particularly to processes and systems for electrostatically coating non-conductive articles.
  • An object of the present invention is to provide novel processes and systems for electrostatically coating non-conductive articles that improve upon and overcome problems in the prior art.
  • Another object of the invention is to provide novel electrostatic coating processes and systems for non-conductive articles having improved efficiency.
  • a further object of the invention is to provide novel electrostatic coating processes and systems having improved coating coverage, particularly on non-conductive articles, for example non-conductive bottles.
  • Another object of the invention is to provide novel electrostatic coating processes and systems for non-conductive containers comprising an electrode with a plurality of bristles disposed in the container to draw a charged coating onto an outer surface thereof.
  • a more particular object of the invention is to provide novel systems for electrostatically coating non-conductive articles generally comprising an electrostatic dispenser on one side of the non-conductive article, and an electrode at an electrical potential different from that of the coating dispenser on an opposite side of the article as the coating dispenser, the electrode having a plurality of discrete conductive protrusions extending therefrom.
  • Another more particular object of the invention is to provide novel systems for electrostatically coating non-conductive articles generally comprising an electrostatic coating dispenser on one side of the article, and a conductive fluid at an electrical potential different from that of the coating dispenser disposed on an opposite side of the article as the dispenser.
  • FIG. 1 illustrates a system 10 for electrostatically coating non-conductive articles, for example glass and plastics and other dielectric materials, and particularly nonconducting containers having openings.
  • the container is a plastic bottle 20 having a neck portion 22 with the opening thereon.
  • the system 10 generally comprises an electrostatic coating dispenser 30, for example the Aerobell-33 coating applicator by ITW Ransburg, Indianapolis, Indiana, that dispenses an electrostatically charged coating material supplied from a supply 32 toward the non-conductive article.
  • the coating dispenser 30 is generally coupled to a high voltage supply 34 that imparts electrostatic charge to the coating material.
  • an electrode 50 at an electrical potential different from that of the electrostatic coating dispenser 30 is disposed generally on an opposite side of the non-conductive article as the coating dispenser 30, thereby drawing the charged coating material toward the non-conductive article.
  • the electrode 50 is disposed least partially in the non-conductive container or bottle 20, thus drawing the charged coating material toward an outer surface thereof.
  • the electrode 50 is coupled to ground potential by a conductive element 51.
  • the electrode 50 and the conductor 51 may for example be mounted in an insulated work holder 60 suitable for holding the container 20 during the coating operation, as is known to those of ordinary skill in the art.
  • the electrode generally comprises a plurality of discrete conductive protrusions extending therefrom.
  • the discrete conductive protrusions preferably have pointed tips, and in one embodiment the plurality of discrete protrusions are a corresponding plurality of electrically conductive bristles.
  • the electrode comprises an axial member 52 with a tip 53, and a plurality of bristles 54 protruding generally radially from the axial member 52.
  • the electrode may be in the form of a commercially available metal brush.
  • the electrode and the bristles thereof are disposed at least partially into the neck portion 22 of the bottle 20.
  • a conductive fluid 70 is disposed in the non-conductive container 20 and is in electrical contact with the conductive element 51 of the work holder 60, which holds the non-conductive container.
  • the work holder 60 may be configured with a sealing member to prevent leakage of the conductive fluid therefrom when the container 20 is inverted or may be configured to suspend the container 20 upright.
  • the conductive fluid is water, but other conductive fluids and conductive additives may be used alternatively.
  • the non-conductive container 20 is filled with the conductive fluid.
  • the conductive fluid 70 generally draws the charged coating material dispensed from the coating dispenser 30 toward the non-conductive container 20, whereby the coating material is relatively efficiently deposited on an outer surface thereof.

Landscapes

  • Details Of Rigid Or Semi-Rigid Containers (AREA)
  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Electrostatic Spraying Apparatus (AREA)
EP00126918A 2000-02-29 2000-12-08 Revêtement électrostatique de bouteilles non conductrices Withdrawn EP1129785A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US51530600A 2000-02-29 2000-02-29
US515306 2000-02-29

Publications (2)

Publication Number Publication Date
EP1129785A2 true EP1129785A2 (fr) 2001-09-05
EP1129785A3 EP1129785A3 (fr) 2002-07-17

Family

ID=24050807

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00126918A Withdrawn EP1129785A3 (fr) 2000-02-29 2000-12-08 Revêtement électrostatique de bouteilles non conductrices

Country Status (7)

Country Link
EP (1) EP1129785A3 (fr)
JP (1) JP2001259484A (fr)
KR (1) KR20010085269A (fr)
CN (1) CN1311062A (fr)
CA (1) CA2327752A1 (fr)
MX (1) MXPA01002061A (fr)
TW (1) TW504405B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7846248B2 (en) * 2002-01-24 2010-12-07 Plastlac S.R.L. Paint, particularly for plastic materials, and painting method using said paint

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100733843B1 (ko) * 2006-04-03 2007-07-03 현대페인트공업 주식회사 Ｍｄｆ 소지에 대한 분체도료 도장방법
KR101603048B1 (ko) 2015-12-17 2016-03-11 홍석원 도색장치
WO2020165987A1 (fr) * 2019-02-14 2020-08-20 アネスト岩田株式会社 Méthode de pulvérisation électrostatique et dispositif de pulvérisation électrostatique utilisé pour une méthode de pulvérisation électrostatique

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3418020A (en) * 1965-10-22 1968-12-24 Brockway Glass Co Inc Wareholder
US3413917A (en) * 1966-11-16 1968-12-03 Purex Corp Ltd Electrostatic printing with means to change polarity of counter electrode
US5156880A (en) * 1991-02-19 1992-10-20 Nordson Corporation Space charge electrostatic coating method and apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7846248B2 (en) * 2002-01-24 2010-12-07 Plastlac S.R.L. Paint, particularly for plastic materials, and painting method using said paint

Also Published As

Publication number Publication date
EP1129785A3 (fr) 2002-07-17
TW504405B (en) 2002-10-01
JP2001259484A (ja) 2001-09-25
CN1311062A (zh) 2001-09-05
MXPA01002061A (es) 2002-08-20
KR20010085269A (ko) 2001-09-07
CA2327752A1 (fr) 2001-08-29

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