EP0998596A2 - Enduction electrophoretique au trempe - Google Patents

Enduction electrophoretique au trempe

Info

Publication number: EP0998596A2
Authority: EP; European Patent Office
Prior art keywords: coating; coated; dip; elements; electrically conductive
Prior art date: 1997-07-19
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.): Granted

Application number

EP98941352A

Other languages

German (de)

English (en)

Other versions

EP0998596B1 (fr

Inventor

Johannes Dahms

Eberhard Heinemann

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.)

ITC Holding GmbH

Original Assignee

kugel-Strahltechnik GmbH

ITC Holding GmbH

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.)

1997-07-19

Filing date

1998-07-16

Publication date

2000-05-10

1998-07-16 Application filed by kugel-Strahltechnik GmbH, ITC Holding GmbH filed Critical kugel-Strahltechnik GmbH

2000-05-10 Publication of EP0998596A2 publication Critical patent/EP0998596A2/fr

2003-01-15 Application granted granted Critical

2003-01-15 Publication of EP0998596B1 publication Critical patent/EP0998596B1/fr

2018-07-16 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

238000003618 dip coating Methods 0.000 title claims abstract description 19
238000000576 coating method Methods 0.000 claims abstract description 33
239000011248 coating agent Substances 0.000 claims abstract description 30
238000000034 method Methods 0.000 claims abstract description 20
239000004922 lacquer Substances 0.000 claims description 19
230000004913 activation Effects 0.000 claims description 8
238000007654 immersion Methods 0.000 claims description 7
239000002184 metal Chemical group 0.000 claims description 4
229910052751 metal Chemical group 0.000 claims description 4
239000003973 paint Substances 0.000 claims description 4
238000005260 corrosion Methods 0.000 claims description 3
230000007797 corrosion Effects 0.000 claims description 3
OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 2
238000000502 dialysis Methods 0.000 claims description 2
229910002804 graphite Inorganic materials 0.000 claims description 2
239000010439 graphite Substances 0.000 claims description 2
239000004033 plastic Substances 0.000 claims description 2
238000010422 painting Methods 0.000 claims 2
230000003213 activating effect Effects 0.000 claims 1
239000013590 bulk material Substances 0.000 claims 1
210000003298 dental enamel Anatomy 0.000 abstract 2
238000004534 enameling Methods 0.000 abstract 2
238000010521 absorption reaction Methods 0.000 description 2
238000004140 cleaning Methods 0.000 description 2
POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 description 1
239000004593 Epoxy Substances 0.000 description 1
239000004640 Melamine resin Substances 0.000 description 1
229920000877 Melamine resin Polymers 0.000 description 1
UEEJHVSXFDXPFK-UHFFFAOYSA-N N-dimethylaminoethanol Chemical compound CN(C)CCO UEEJHVSXFDXPFK-UHFFFAOYSA-N 0.000 description 1
239000004615 ingredient Substances 0.000 description 1
239000007788 liquid Substances 0.000 description 1
239000000463 material Substances 0.000 description 1
239000002904 solvent Substances 0.000 description 1
239000000126 substance Substances 0.000 description 1
239000002966 varnish Substances 0.000 description 1

Classifications

- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
- C25D17/10—Electrodes, e.g. composition, counter electrode
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/22—Servicing or operating apparatus or multistep processes

Definitions

the invention is directed to a method for electro-immersion coating of electrically conductive elements, such as screws, nuts, washers or other small parts, the elements to be coated being positioned in, on or on a support element in a coating bath provided with at least one anode and cathode are.
Electro-immersion coating or lacquering is known in different procedures, it often being necessary to clean the metallic support elements after the treatment in such a way that an electrically conductive, active metallic surface is exposed again. This is associated with a number of disadvantages, in particular large amounts of electro-dip lacquer, which is to be regarded as a valuable substance, are wasted. Cleaning, which is generally to be carried out with solvent, is comparatively complex and expensive, in addition, if it is carried out encapsulated in relation to the environment, and is also time-consuming.
the object of the invention is therefore to provide a solution with which an electro-dip coating with anodes and cathodes or support elements can be carried out after an initial absorption of electro-dip lacquer can continue to be used without previous cleaning and without renewed absorption of electro-dip lacquer after the subsequent, repeated use.
this object is achieved according to the invention in that the anode in a cathodic electro-dip coating or the cathode in an anodic dip-coating is coated with a lacquer which has been baked after the coating and then activated and / or was coated with an electrically conductive varnish, which then hardens at room temperature.
the advantage of the present invention is that the anode and cathode are activated with dip coating in such a way that they are subsequently conductive for direct and alternating currents of different voltages.
the anode or cathode and / or the support element are coated with a cathodic or anodic dip lacquer with a voltage until no more current flows, then the lacquer is baked or cured at room temperature and subsequently the coating of the Objects is activated by applying a DC or AC voltage, with in another embodiment, it can be provided that the support element is coated with objects to be coated after the dip lacquer coating, introduced into the dip lacquer and exposed to some high current surges, in particular direct current surges, for activation during the coating of the objects.
Corrosion protection can also be provided according to the invention, such a method being characterized in one embodiment in that the anodes or cathodes are coated with a corrosion protection, for example a zinc dust paint, before the coating or the electro-dip coating and the subsequent activation of the coating. be coated.
a corrosion protection for example a zinc dust paint
the invention makes it possible, depending on the type of procedure, to operate the anodes or cathodes freely in the coating basin, ie outside of a dialysis cell. Nevertheless, the invention alternatively provides for the use of such a cell.
these elements can also be designed according to the invention as plastic elements provided with metal coatings before the electro-dip coating, which are then used in the method according to the invention.
a drum or a basket or a frame for hanging the articles to be coated can be used as supporting elements for bulk goods.
a coating tape can also be used which has been painted and activated according to the procedure according to the invention.
the supporting elements for the activation can expediently be provided with a very dense pack of electrically conductive objects, as is also provided by the invention in a further embodiment.
FIGS. 1 and 2 show a cathodic dip coating device and an anodic dip coating device in a highly simplified representation in FIGS. 1 and 2, with some coating parameters of the dip coating being reproduced following the description.
FIG. 1 shows an electrically conductive immersion basket 1 connected as a cathode with the material 6 to be coated shown as balls, the walls of the basin being equipped with anodes 3. It is possible, e.g. to apply a direct current of 20 V over a longer period of time, via a control device 5, high current surges, in the order of magnitude of 1,000 V, can be supplied to the basket 1 in order to activate the immersion lacquer layer deposited on the basket surface in such a way that it is used in subsequent treatment stages remains permanently electrically conductive, ie can act as a cathode. In the same way, the anodes 3 can be coated and the surfaces activated accordingly.
lacquer As an example of a lacquer used here Let us give an epoxy resin-amine-melamine resin combination that is pigmented and water-dilutable. Some of the ingredients are l-methoxy-2-propanol, 2-butoxy-ethanol and 2-dimethylamino-ethanol. This is a liquid black lacquer.

Landscapes

Chemical & Material Sciences (AREA)
Engineering & Computer Science (AREA)
Chemical Kinetics & Catalysis (AREA)
Electrochemistry (AREA)
Materials Engineering (AREA)
Metallurgy (AREA)
Organic Chemistry (AREA)
Application Of Or Painting With Fluid Materials (AREA)
Paints Or Removers (AREA)
Glass Compositions (AREA)
Photoreceptors In Electrophotography (AREA)
Organic Insulating Materials (AREA)

EP98941352A 1997-07-19 1998-07-16 Enduction electrophoretique au trempe Expired - Lifetime EP0998596B1 (fr)

Applications Claiming Priority (3)

Application Number	Priority Date	Filing Date	Title
DE19731101A DE19731101C1 (de)	1997-07-19	1997-07-19	Verfahren zur Elektro-Tauch-Beschichtung
DE19731101		1997-07-19
PCT/EP1998/004454 WO1999004064A2 (fr)	1997-07-19	1998-07-16	Enduction electrophoretique au trempe

Publications (2)

Publication Number	Publication Date
EP0998596A2 true EP0998596A2 (fr)	2000-05-10
EP0998596B1 EP0998596B1 (fr)	2003-01-15

Family

ID=7836285

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP98941352A Expired - Lifetime EP0998596B1 (fr)	1997-07-19	1998-07-16	Enduction electrophoretique au trempe

Country Status (7)

Country	Link
US (1)	US6554988B1 (fr)
EP (1)	EP0998596B1 (fr)
AT (1)	ATE231196T1 (fr)
AU (1)	AU8976498A (fr)
DE (2)	DE19731101C1 (fr)
ES (1)	ES2186209T3 (fr)
WO (1)	WO1999004064A2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE10250471B3 (de) *	2002-10-30	2004-04-01	Lindal Ventil Gmbh	Anlage zur Antikorrosionsbehandlung von Ventiltellern für Spenderbehälter
US7947160B2 (en)	2004-08-13	2011-05-24	Ppg Industries Ohio, Inc.	System for coating objects
US7455732B2 (en) *	2004-08-13	2008-11-25	Ppg Industries Ohio, Inc.	Apparatus and systems for coating objects
US7943028B2 (en) *	2004-08-13	2011-05-17	Ppg Industries Ohio, Inc.	Method for coating objects
US20060032730A1 (en) *	2004-08-13	2006-02-16	Kaufman Paul J	Belt conveyor apparatus
TWI412629B (zh) *	2011-05-23	2013-10-21	Univ Tatung	電泳沉積裝置及電泳沉積方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3879277A (en) *	1973-04-27	1975-04-22	Armco Steel Corp	Method and apparatus for electropainting small articles
US4668358A (en) *	1986-05-14	1987-05-26	Motor Wheel Corporation	Method and apparatus for use in surface treatment of conveyor supported workholders

1997
- 1997-07-19 DE DE19731101A patent/DE19731101C1/de not_active Expired - Fee Related
1998
- 1998-07-16 DE DE59806949T patent/DE59806949D1/de not_active Expired - Fee Related
- 1998-07-16 US US09/831,137 patent/US6554988B1/en not_active Expired - Fee Related
- 1998-07-16 AU AU89764/98A patent/AU8976498A/en not_active Abandoned
- 1998-07-16 EP EP98941352A patent/EP0998596B1/fr not_active Expired - Lifetime
- 1998-07-16 WO PCT/EP1998/004454 patent/WO1999004064A2/fr not_active Ceased
- 1998-07-16 ES ES98941352T patent/ES2186209T3/es not_active Expired - Lifetime
- 1998-07-16 AT AT98941352T patent/ATE231196T1/de not_active IP Right Cessation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9904064A2 *

Also Published As

Publication number	Publication date
AU8976498A (en)	1999-02-10
WO1999004064A2 (fr)	1999-01-28
WO1999004064A3 (fr)	1999-05-27
DE19731101C1 (de)	1998-08-06
DE59806949D1 (de)	2003-02-20
EP0998596B1 (fr)	2003-01-15
ES2186209T3 (es)	2003-05-01
US6554988B1 (en)	2003-04-29
ATE231196T1 (de)	2003-02-15

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2001-10-31	17Q	First examination report despatched	Effective date: 20010921
2001-11-21	RAP1	Party data changed (applicant data changed or rights of an application transferred)	Owner name: ITC HOLDING GMBH
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DE19643080C2 (de)	2003-10-30	Verfahren zum doppelten Beschichten einer Karosserie durch Elektrotauchlackierung
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