EP0969146B1 - Vorrichtung zum kathodischen Schutz von Auftragselementen einer Papierstreichanlage - Google Patents
Vorrichtung zum kathodischen Schutz von Auftragselementen einer Papierstreichanlage Download PDFInfo
- Publication number
- EP0969146B1 EP0969146B1 EP99112510A EP99112510A EP0969146B1 EP 0969146 B1 EP0969146 B1 EP 0969146B1 EP 99112510 A EP99112510 A EP 99112510A EP 99112510 A EP99112510 A EP 99112510A EP 0969146 B1 EP0969146 B1 EP 0969146B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coating
- applicator
- paper
- applicator element
- sacrificial anode
- 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
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
- B05C11/023—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
- B05C11/04—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
- C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
Definitions
- the invention relates to a cathodic protection against corrosion according to at least one order element for paper coating systems the preamble of claim 1.
- the invention is therefore based on the object, coating systems to improve with simple order elements so that the service life of the order elements increases.
- the invention is based on an embodiment that in the drawing is shown, explained in more detail.
- the drawing shows a coating system for paper webs 11 with external Voltage source 6 and a sacrificial anode 3 in the coating slip 4 is arranged.
- the coating system consists of a Distribution tube 5, which is transverse to the entire length Paper web 11 runs.
- This distribution tube 5 stands with a storage container, not shown, for the coating slip in connection, the constant coating mass in the distribution tube 5 promoted.
- the coating slip 4 emerges from the upper outlet slot of the distribution tube 5 taken along by the passing paper web 11, which by a counter roller 1 is guided past the slot.
- the excess coating slip 4 is from an application element, which is designed as a comb-like metering lamella 9 again stripped from the paper web 11 and gets into one Collection container 2, from which the coating slip 4 is in again the reservoir is returned.
- the one from the metering lamella 9 applied coating agent threads or strands are followed by the further order element that follows as Doctor blade 10 is formed, evenly thin on the paper web deleted by the doctor blade 10 under a acute angles evenly under a certain pressure is supported on the counter roller 1.
- This is a elastic squeegee 10 that bends in an S-shape and that lies across the entire paper web 11 on the counter roller 1, so that a thin, even line as possible on the paper surface 11 is applied. Through this device a line is applied to one side of the paper.
- the sacrificial anode 3 is arranged in the distribution tube 5 and there surrounded by the coating slip 4, with it in this electrical contact.
- the coating slip represents aqueous anionic dispersion is an electrolyte which in Connection with two opposite electrodes is a voltage element forms.
- the sacrificial anode 3 as one of the opposite Is made of an electrically conductive material that in the voltage series is less noble than the material of the order elements 9, 10, which are connected as a cathode. hereby the electrical element is formed, which is only on the base material causes corrosive material removal.
- a sacrificial anode 3 is therefore advantageously made of zinc used because this material compared to the doctor blade 10th or the leveling bars represent the less noble material, because in practice these are mostly made of iron or an iron alloy are manufactured and thus subject to corrosion are.
- the sacrificial anode 3 is also with the doctor blade 10 by a Line electrically connected, both simultaneously with the aqueous coating slip 4 on the paper web 11 in contact come. This causes an electric current to flow from the doctor blade 10 to the sacrificial anode 3 and leads to corrosive material removal almost only at the anode 3, so that the corrosive Wear on the doctor blade 10 reduced and the service life is increased.
- a DC voltage source 6 in which the anode 3 with the positive pole and the cathode 10 with the The negative pole of the voltage source 6 is connected.
- the plus pole is at the same time connected and can with the metering lamella 9 also in connection with other doctor blades, so that hardly any corrosion-related material removal on these application elements will be done.
- a second sacrificial anode 3a is also provided, the directly in the return of the coating slip on the doctor blade 10 is arranged. This creates an approximately the same size Current flow from the order elements 9, 10 to the sacrificial anodes 3, 3a, so that a uniform material removal on both anodes 3, 3a can be reached. This provides optimal protection against corrosion caused on the order elements 9, 10.
- Such one Corrosion protection is also with leveling rolls or comparable coating and application devices can be used, which consist of corrosive material and with the electrolytic anionic coating slip come into contact.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating Apparatus (AREA)
- Paper (AREA)
- Prevention Of Electric Corrosion (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Description
Claims (5)
- Vorrichtung zum kathodischen Korrosionsschutz von mindestens einem Auftragselement einer Papierstreichanlage, dadurch gekennzeichnet, daß das Auftragselement (9, 10) aus einem elektrisch leitfähigen Material besteht, das mit mindestens einer Opferanode (3, 3a) elektrisch verbunden ist, die in elektrischem Kontakt mit einer wäßrigen anionischen Streichmasse (4) steht und aus einem in der Spannungsreihe unedleren Material als das Auftragselement (9, 10) besteht.
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß zwischen dem Auftragselement (9, 10) und der Opferanode (3, 3a) eine Gleichspannungsquelle (6) geschaltet ist, deren Minuspol mit dem Auftragselement (9, 10) verbunden ist.
- Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß alle Auftragselemente (9, 10) einer Papierstreichanlage elektrisch miteinander oder mit dem Minuspol der Spannungsquelle (6) verbunden sind.
- Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Auftragselement ein Streichrakel (10), eine Dosierlamelle (9) oder eine Auftragswalze mit Egalisierungsstäben darstellt.
- Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Opferanode (3, 3a) aus Zink und die Auftragselemente (10, 9) aus Eisen oder einer Eisenlegierung bestehen, wobei die Streichmasse (4) einen anionischen Elektrolyten darstellt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19829491A DE19829491A1 (de) | 1998-07-01 | 1998-07-01 | Vorrichtung zum kathodischen Korrosionsschutz von Auftragslementen einer Papierstreichanlage |
DE19829491 | 1998-07-01 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0969146A1 EP0969146A1 (de) | 2000-01-05 |
EP0969146B1 true EP0969146B1 (de) | 2003-09-17 |
Family
ID=7872697
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99112510A Expired - Lifetime EP0969146B1 (de) | 1998-07-01 | 1999-07-01 | Vorrichtung zum kathodischen Schutz von Auftragselementen einer Papierstreichanlage |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0969146B1 (de) |
AT (1) | ATE250163T1 (de) |
DE (2) | DE19829491A1 (de) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3166487A (en) * | 1962-02-14 | 1965-01-19 | Cranston Print Works Co | Cathodic protection of printing apparatus |
US3623965A (en) * | 1969-10-08 | 1971-11-30 | Cranston Print Works Co | Cathodic protection of printing apparatus |
DE2611625B2 (de) * | 1976-03-19 | 1979-07-12 | Hoechst Ag, 6000 Frankfurt | Beschichtungsvorrichtung |
US4397726A (en) * | 1981-10-13 | 1983-08-09 | A. O. Smith Harvestore Products, Inc. | Cathodically protected vessel |
SE467528B (sv) * | 1988-09-27 | 1992-08-03 | Btg Kaelle Inventing Ab | Anordning foer bestrykning av en loepande bana |
-
1998
- 1998-07-01 DE DE19829491A patent/DE19829491A1/de not_active Withdrawn
-
1999
- 1999-07-01 AT AT99112510T patent/ATE250163T1/de not_active IP Right Cessation
- 1999-07-01 DE DE59906991T patent/DE59906991D1/de not_active Expired - Fee Related
- 1999-07-01 EP EP99112510A patent/EP0969146B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE19829491A1 (de) | 2000-01-05 |
ATE250163T1 (de) | 2003-10-15 |
DE59906991D1 (de) | 2003-10-23 |
EP0969146A1 (de) | 2000-01-05 |
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