EP0978575B1 - Verfahren und Vorrichtung zum Entfernen von Dendriten - Google Patents
Verfahren und Vorrichtung zum Entfernen von Dendriten Download PDFInfo
- Publication number
- EP0978575B1 EP0978575B1 EP99112617A EP99112617A EP0978575B1 EP 0978575 B1 EP0978575 B1 EP 0978575B1 EP 99112617 A EP99112617 A EP 99112617A EP 99112617 A EP99112617 A EP 99112617A EP 0978575 B1 EP0978575 B1 EP 0978575B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- strip
- dendrites
- spray nozzles
- coating
- overflow
- 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.)
- Expired - Lifetime
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.
- a belt cleaning device is known from EP 0 601 991 A, in which the surface of a metallic tape an alkaline liquid with nozzles is directed, which lead to atomization of the liquid. The distance of dendrites is not provided.
- the invention is based, dendrites in a simple manner, Can be removed inexpensively and with high operational reliability so that no damage of the tape occur and the formation of residues can be avoided is.
- the method according to the invention for removing dendrites on the surface of electrolytically coated metal strips provides that after an electrolytic coating using the dendrites high-pressure liquid jets directed towards the belt edge are removed.
- the method has the advantage that this type of dendrite removal does not Damage to the tape occurs.
- the tool is not subject to wear recorded.
- the process works free of residues because the high pressure liquid in the Cycle is performed.
- the process also allows the dendrites to be recovered, by dissolving them and feeding them back to the coating process become.
- a container is around the belt running over rollers arranged, spray nozzles on the belt inside the container, genaver on the belt edge, are directed and a high pressure liquid on the surface of the tape works.
- At least one sedimentation basin is arranged in the lower part of the container has an overflow.
- Water can be used as pressure fluid. However, it is advantageous to have one Use fluid that will dissolve the removed dendrites. 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 due.
- 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 supply.
- 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 opens 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)
- Application Of Or Painting With Fluid Materials (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
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 im Bereich der Bandkanten von elektrolytisch beschichteten Bändern aus Metall, dadurch gekennzeichnet, dass nach der elektrolytischen Beschichtung die Dendriten mittels auf die Bandkante gerichteter 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.
- Verfahren 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.
- Elektrolytische Beschichtungsanlage für Metallbänder mit einer an eine Beschichtungseinrichtung angeschlossenen Vorrichtung zum Entfernen von Dendriten auf der Oberfläche im Bereich der Bandkante eines Bandes mit:einem Behälter (5), durch den das elektrolytisch beschichtete Band (1) über Rollen (9, 12, 13) hindurch läuft,mit auf die Bandkante gerichtete Spritzdüsen (3), die um das Band (1) angeordnet sind und über die im Betrieb der Vorrichtung eine Hochdruckflüssigkeit auf die Oberfläche des Bandes (1) wirkt undein Absetzbecken (8) mit mindestens einem Überlauf (4) im unteren Teil des Behälters (5).
- Beschichtungsanlage 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.
- Beschichtungsanlage 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.
- Beschichtungsanlage nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, dass die Spritzdüsen (3) in Winkel und Abstand zum Band (1) verstellbar angeordnet sind.
- Beschichtungsanlage nach einem der Ansprüche 6 bis 9, dadurch gekennzeichnet, dass die Spritzdüsen (3) in Richtung auf die Kanten des Bandes (1) angeordnet sind.
- Beschichtungsanlage nach einem der Ansprüche 6 bis 10, dadurch gekennzeichnet, dass das Absetzbecken (8) parallel zur Transportrichtung des Bandes (1) angeordnet ist.
- Beschichtungsanlage 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 |
---|---|---|---|
DE19834759A DE19834759C2 (de) | 1998-08-01 | 1998-08-01 | Verfahren und Vorrichtung zum Entfernen von Dendriten |
DE19834759 | 1998-08-01 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0978575A1 EP0978575A1 (de) | 2000-02-09 |
EP0978575B1 true 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) |
Families Citing this family (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 (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0601991A1 (de) * | 1992-12-08 | 1994-06-15 | COCKERILL MECHANICAL INDUSTRIES Société Anonyme | Verfahren und Vorrichtung zur Reinigung von Metallbändern |
Family Cites Families (7)
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 |
GB1602731A (en) * | 1977-04-29 | 1981-11-18 | British Steel Corp | Removal of excess liquid coatant from skip |
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 |
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 |
-
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 (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0601991A1 (de) * | 1992-12-08 | 1994-06-15 | COCKERILL MECHANICAL INDUSTRIES Société Anonyme | Verfahren und Vorrichtung zur Reinigung von Metallbändern |
Also Published As
Publication number | Publication date |
---|---|
DE59902326D1 (de) | 2002-09-19 |
ES2182435T3 (es) | 2003-03-01 |
ATE222302T1 (de) | 2002-08-15 |
EP0978575A1 (de) | 2000-02-09 |
DE19834759A1 (de) | 2000-02-03 |
DE19834759C2 (de) | 2002-02-21 |
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