EP0978575A1 - Verfahren und Vorrichtung zum Entfernen von Dendriten - Google Patents
Verfahren und Vorrichtung zum Entfernen von Dendriten Download PDFInfo
- Publication number
- EP0978575A1 EP0978575A1 EP99112617A EP99112617A EP0978575A1 EP 0978575 A1 EP0978575 A1 EP 0978575A1 EP 99112617 A EP99112617 A EP 99112617A EP 99112617 A EP99112617 A EP 99112617A EP 0978575 A1 EP0978575 A1 EP 0978575A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- dendrites
- belt
- spray nozzles
- overflow
- 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.)
- Granted
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/48—After-treatment of electroplated surfaces
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
- C25D7/06—Wires; Strips; Foils
- C25D7/0614—Strips or foils
Definitions
- the invention relates to a method for removing dendrites according to the Features of the first claim and a device for Execution of the procedure.
- the method can be used wherever there are crystals on metal strips accumulate, especially zinc crystals, so-called dendrites, which in the electrolytic coating of tapes arise.
- the inventive method for removing dendrites on the Surface of electrolytically coated strips of metal provides that after an electrolytic coating the dendrites by means of Tape, preferably directed to the edge of the tape High pressure liquid jets are removed.
- the method has the advantage that this type of dendrite removal no damage to the tape occurs.
- the tool is worn not to be recorded.
- the process works without residues because the High pressure liquid is circulated.
- the procedure allows it also to recover the dendrites by dissolving them and giving the Coating process can be fed again.
- the belt running over rolls is on Container arranged, with spray nozzles on the inside of the container Tape, preferably on the tape edge, and a High pressure liquid acts on the surface of the belt.
- At least one sedimentation basin is arranged in the lower part of the container, which has an overflow.
- Water can be used as pressure fluid. However, it is advantageous use a liquid that dissolves the removed dendrites brings about. In the case of galvanizing, this can be sulfuric acid.
- the hydraulic fluid with the removed Dendrites get into the collecting and collecting container in which the Discontinue dendrites and dissolve in the liquid. It forms in the case electrolytic galvanizing with sulfuric electrolyte hydrogen, which escapes, and zinc sulfate, which the electrolysis process again can be supplied. But there is also the possibility that Clean overflowing liquid in the collecting container in a filter and via a high-pressure pump back into the process as pressure fluid attributed.
- the sedimentation tank too may have more than one overflow, it being possible to overflow Liquid on the one hand as high-pressure liquid again the spray nozzles feed.
- Another overflow can serve the overflowing Liquid can be attributed to the electrolysis process.
- the spray nozzles are adjustable in angle and spaced from the band. In order to Adjusting the nozzles at different bandwidths can be done easily be made.
- each side of the band 1 spray nozzles 3 are arranged with their Spray liquid on tape 1 and remove the dendrites. This get into the settling tank 8 together with the spray liquid lower part of the container 5. Since the high-pressure liquid Sulfuric acid, it goes with the dendrites, which consist of zinc, a conversion process, being in the bottom of the container Zinc sulfate forms, which is pumped on via the overflow and as Spray liquid or can serve as an electrolyte. That in the process emerging hydrogen gas escapes.
- the overflow 4 shown in FIG. 1 flows into a filter 6, the solid components from the overflow liquid removed by the high pressure pump 7 again under high pressure by the Nozzles 3 is sprayed onto the belt 1.
- Dendrite ripener 2 shows a longitudinal section through the invention Dendrite ripener 2, the band 1 initially via a current roller 13 and a support roller 12 reaches the dendrite scraper 2 and then on is fed to a cascade rinse via squeeze rollers 9.
- the container 5 is divided by partitions 10 so that the liquid from individual Areas can be deducted.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electroplating Methods And Accessories (AREA)
- Electrolytic Production Of Metals (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
- Fig. 1
- Prinzipdarstellung des erfindungsgemäßen Dendritenabstreifers im Schnitt quer zum Band,
- Fig. 2
- Anordnung des Dendritenabstreifers vor einer Kaskadenspülung.
- 1
- Band
- 2
- Dendritenabstreifer
- 3
- Spritzdüse
- 4
- Überlauf
- 5
- Behälter
- 6
- Filter
- 7
- Hochdruckpumpe
- 8
- Absetzbecken
- 9
- Abquetschrollen
- 10
- Trennwand
- 11
- H2SO4
- 12
- Tragrolle
- 13
- Stromrolle
- 14
- Kaskadenspülung
Claims (12)
- Verfahren zum Entfernen von Dendriten auf der Oberfläche, vorzugsweise an den Kanten, von elektrolytisch beschichteten Bändern aus Metall, dadurch gekennzeichnet, daß
nach einer elektrolytischen Beschichtung die Dendriten mittels auf das Band, vorzugsweise auf die Bandkante, gerichtete Hochdruckflüssigkeitsstrahlen entfernt werden. - Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß
als Druckflüssigkeit Wasser angewendet wird. - Verfahren nach Anspruch 1 und 2, dadurch gekennzeichnet, daß
der Druckflüssigkeit eine Säure oder ähnliche, die Dendriten auflösende Substanz zugesetzt wird. - Verfahren nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß
die Druckflüssigkeit mit den entfernten Dendriten in einen Auffang- und Sammelbehälter gelangt, in dem sich die Dendriten absetzen und in der Druckflüssigkeit auflösen, wobei Wasserstoff entweicht und die aufgelösten Dendriten in den Beschichtungsprozeß und/oder die Spritzdüsen zurückgeführt werden. - Vorrichtung nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, daß
der Überlauf des Sammelbehälters in einem Filter gereinigt und über eine Hochdruckpumpe wieder als Druckflüssigkeit angewendet wird. - Vorrichtung zum Entfernen von Dendriten auf der Oberfläche eines Bandes, bestehend aus:einem Behälter (5), durch den das elektrolytisch beschichtete Band (1) über Rollen (9, 12, 13) hindruchläuft,wobei auf das Band (1) gerichtete Spritzdüsen (3) um das Band (1) angeordnet sind und eine Hochdruckflüssigkeit auf die Oberfläche des Bandes (1) wirktund der untere Teil des Behälters (5) mindestens ein Absetzbecken (8) mit mindestens einem Überlauf (4) aufweist.
- Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß
der Überlauf (4) des Absetzbeckens (8) über einen Filter (6) mit einer Hochdruckpumpe (7) und den Spritzdüsen (3) verbunden ist. - Vorrichtung nach Anspruch 6 und 7, dadurch gekennzeichnet, daß
das Absetzbecken (8) einen Überlauf (4) für die Hochdruckflüssigkeit und einen Überlauf (4) für die Ableitung in den Beschichtungsprozeß aufweist. - Vorrichtung nach einem der Ansprüche 6 bis 8,
dadurch gekennzeichnet, daß
die Spritzdüsen (3) in Winkel und Abstand zum Band (1) verstellbar angeordnet sind. - Vorrichtung nach einem der Ansprüche 6 bis 9,
dadurch gekennzeichnet, daß
die Spritzdüsen (3) in Richtung auf die Kanten des Bandes (1) angeordnet sind. - Vorrichtung nach einem der Ansprüche 6 bis 10,
dadurch gekennzeichnet, daß
das Absetzbecken (8) parallel zur Transportrichtung des Bandes (1) angeordnet ist. - Vorrichtung nach einem der Ansprüche 6 bis 11,
dadurch gekennzeichnet, daß
den Spritzdüsen (3) eine Kaskadenspülung (14) nachgeschaltet ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19834759 | 1998-08-01 | ||
DE19834759A DE19834759C2 (de) | 1998-08-01 | 1998-08-01 | Verfahren und Vorrichtung zum Entfernen von Dendriten |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0978575A1 true EP0978575A1 (de) | 2000-02-09 |
EP0978575B1 EP0978575B1 (de) | 2002-08-14 |
Family
ID=7876123
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99112617A Expired - Lifetime EP0978575B1 (de) | 1998-08-01 | 1999-07-02 | Verfahren und Vorrichtung zum Entfernen von Dendriten |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0978575B1 (de) |
AT (1) | ATE222302T1 (de) |
DE (2) | DE19834759C2 (de) |
ES (1) | ES2182435T3 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT412160B (de) * | 2002-06-26 | 2004-10-25 | Andritz Ag Maschf | Vorrichtung zum entfernen von dendriten an den kanten eines metall-bandes |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1602731A (en) * | 1977-04-29 | 1981-11-18 | British Steel Corp | Removal of excess liquid coatant from skip |
US4787112A (en) * | 1987-08-28 | 1988-11-29 | Usx Corporation | Edge brush for electroplated strip |
SU1563959A1 (ru) * | 1988-07-12 | 1990-05-15 | Новгородский Политехнический Институт | Способ изготовлени абразивного инструмента |
US5476578A (en) * | 1994-01-10 | 1995-12-19 | Electroplating Technologies, Ltd. | Apparatus for electroplating |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3881040A (en) * | 1972-04-26 | 1975-04-29 | United States Steel Corp | Method for removing excess coating material from strip edges |
DE3343611A1 (de) * | 1983-12-02 | 1985-06-13 | Woma-Apparatebau Wolfgang Maasberg & Co Gmbh, 4100 Duisburg | Verfahren und vorrichtung zur materialbehandlung mit einem hochdruckmittelstrahl |
DE3507923A1 (de) * | 1985-03-06 | 1986-09-11 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München | Strahleinrichtung zum entgraten |
BE1006465A3 (fr) * | 1992-12-08 | 1994-09-06 | Cockerill Mech Ind Sa | Procede et installation de nettoyage de bandes d'acier. |
-
1998
- 1998-08-01 DE DE19834759A patent/DE19834759C2/de not_active Expired - Fee Related
-
1999
- 1999-07-02 ES ES99112617T patent/ES2182435T3/es not_active Expired - Lifetime
- 1999-07-02 EP EP99112617A patent/EP0978575B1/de not_active Expired - Lifetime
- 1999-07-02 AT AT99112617T patent/ATE222302T1/de not_active IP Right Cessation
- 1999-07-02 DE DE59902326T patent/DE59902326D1/de not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1602731A (en) * | 1977-04-29 | 1981-11-18 | British Steel Corp | Removal of excess liquid coatant from skip |
US4787112A (en) * | 1987-08-28 | 1988-11-29 | Usx Corporation | Edge brush for electroplated strip |
SU1563959A1 (ru) * | 1988-07-12 | 1990-05-15 | Новгородский Политехнический Институт | Способ изготовлени абразивного инструмента |
US5476578A (en) * | 1994-01-10 | 1995-12-19 | Electroplating Technologies, Ltd. | Apparatus for electroplating |
Non-Patent Citations (1)
Title |
---|
DATABASE WPI Week 199103, Derwent World Patents Index; Page 61, AN 1991-020342, XP002119450 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT412160B (de) * | 2002-06-26 | 2004-10-25 | Andritz Ag Maschf | Vorrichtung zum entfernen von dendriten an den kanten eines metall-bandes |
Also Published As
Publication number | Publication date |
---|---|
ATE222302T1 (de) | 2002-08-15 |
DE19834759A1 (de) | 2000-02-03 |
ES2182435T3 (es) | 2003-03-01 |
EP0978575B1 (de) | 2002-08-14 |
DE19834759C2 (de) | 2002-02-21 |
DE59902326D1 (de) | 2002-09-19 |
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