CN103649412A - Dirt-repellent cleaning scraper - Google Patents
Dirt-repellent cleaning scraper Download PDFInfo
- Publication number
- CN103649412A CN103649412A CN201280033600.7A CN201280033600A CN103649412A CN 103649412 A CN103649412 A CN 103649412A CN 201280033600 A CN201280033600 A CN 201280033600A CN 103649412 A CN103649412 A CN 103649412A
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- CN
- China
- Prior art keywords
- coating
- cleaning doctor
- polymer
- cleaning
- matrix
- 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.)
- Pending
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Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G3/00—Doctors
- D21G3/005—Doctor knifes
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G3/00—Doctors
Landscapes
- Paper (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The invention relates to a cleaning scraper for cleaning roll surfaces of paper machines, wherein the cleaning scraper (10) has a base body (11) and a coating covering at least a part of the surface of the base body, said coating comprising a first coating layer (12) and a second coating layer (13) arranged on the first coating layer, the second coating layer (13) being formed by a polymer.
Description
Technical field
The present invention relates to a kind of scraper for paper machine, particularly in paper-making process for the formation of the cleaning doctor of clean roller surface.
Background technology
In paper machine, with cleaning doctor, clean the surface of roll.By removing impurities under the help at one or more cleaning scraper blades that press to roll coating (Bezug) surface, realize the clean of roller surface.Conventionally by the residue of paper, the impurity that the fiber of paper and particle form can cause local load peak (Belastungsspitzen) on blade, make as reaching longer life-span or the duration of runs, conventionally by steel or under corrosive service condition, by stainless steel, manufacture cleaning doctor, and the place contacting in the region with being provided with roll has hard metal coating.
Can manufacture hard metal coating with commercially available hard metal powder, this powder for example has 8～10% cobalt and a tungsten carbide as hard material.Preferably with hot-spraying technique, prepare this coating, wherein, by this coating material coating multipass (H ü ben), to form uniform as far as possible hard metal coating with regard to its composition and physical property aspect.Each produces on the matrix material of blade all over coating meeting
the thin layer of one coating material or be covered with coating on last layer.The component of having guaranteed this coating material with the mode Coating of a plurality of thin layers can dissociation when setting up coating.Maintain coating parameter aspect, chemistry and the physical characteristic that can produce thus based on each layer are uniform coatings in macroscopic view.
Yet this coating surface has adhesiveness to the impurity coming off from roll coating, thereby the removal of impurity particle is accompanied by the continuous reduction of cleaning doctor effect, and As time goes on makes the cleaning effect of cleaning doctor impaired.
Therefore, hope can provide a kind of cleaning doctor having through improved long-term cleaning effect.
Summary of the invention
According to an embodiment, the cleaning doctor of so a kind of roller surface for clean paper making machine has matrix and covers the coating at least part of matrix surface.In this case, this coating comprises the first metal coating and is arranged on the second coating in described the first coating, and wherein said the second coating is formed by polymer.
According to the cleaning doctor of this embodiment, with the second coating being formed by polymer, to each roller surface, exert pressure.Due to the adhesive force of impurity on polymer than it little on metal coating, make to remove the improvement that the impurity departing from from roller surface is improved and has realized thus cleaning quality.Except this anti-fouling effect, described cleaning doctor also has through improved sliding capability on the contact-making surface with roll, thereby has reduced to act on the power in coating, and this has extended the life-span of cleaning doctor.
It should be noted that, in this description and claim, be used for enumerating the term of feature, for example, " comprise ", " having ", " comprising ", " containing " and " use ", and phraseological change to be conventionally considered as be to not exclusively the enumerating of features such as component, method step, equipment, scope, size, and never get rid of other or extra feature or the existence of feature group.
In each embodiment, described polymer comprises epoxy resin, because it is with non-crosslinked or partial cross-linked in good condition infiltrated the first coating material of metal, thereby can stick to well on this material.In other embodiment, described polymer has advantageously comprised organic silicon polyester resin, because it combines excellent anti-fouling effect and good antistick characteristic and sliding.Can in described polymer, embed filler to improve anti-fouling effect and the sliding capability of coating surface, wherein, described filler comprises polyvinyl fluoride (PFE), particularly polytetrafluoroethylene (PTFE) (PTFE) in a preferred embodiment.In favourable embodiment, this filler, with the form of particle, particularly exists to have the form of the particle of the average grain diameter within the scope of 0.1～5 μ m.This polymer also can be directly by polyvinyl fluoride and formed by polytetrafluoroethylene (PTFE) or form by comprising the polymer of this material especially, replace epoxy resin and organic silicon polyester resin with the filler containing PFE or PTFE.
In some embodiments, the material of the first coating comprises hard metal, and this hard metal combines excellent mechanical strength and higher ABRASION RESISTANCE, and it effectively also can be coated on the matrix of cleaning doctor economically with modern hot-spraying technique.In some embodiments, this hard metal preferably comprises 8～10% cobalt, and contains a tungsten carbide as hard material.In other embodiment, described the first coating has the material that comprises oxide ceramics.The preferred self-alumina of oxide ceramics of described oxide ceramics or described the first coating, zirconia, magnesia, chromium oxide (III), yittrium oxide and titanate esters (Titanate).
The first coating preferably has in 5～8 μ m scopes at the intersection with the second coating, be not the surface roughness in 6～7 μ m scopes, to realize the form fit (Formschluss) between the first and second coatings.In other embodiment, in the surf zone of the matrix in abutting connection with the first coating, be arranged so that the bond layer of the Adhesion enhancement of the first coating on matrix.The bed thickness of the first coating is preferably the value within the scope of approximately 50～100 μ m, and the bed thickness of the second coating is preferably the value within the scope of approximately 20～80 μ m.
In conjunction with hereinafter description and claim and the accompanying drawing of embodiment, other features of the present invention will become apparent.It should be pointed out that the present invention does not limit the embodiment of described embodiment, but be able to clearly by the scope of appending claims.Especially, in embodiments of the present invention, with the embodiment of varying number and combination, can realize the feature of being enumerated by embodiment described below.In the following description of some embodiments of the present invention, with reference to accompanying drawing 1, it shows the schematic diagram of the cross section of the cleaning doctor in its blade (Wate) scope.
Accompanying drawing explanation
Fig. 1 show arrange cated cleaning doctor 10 for being placed in the cross section of the front end area that roller surface arranges.Described cleaning scraper blade 10 has matrix 11 and coating, and described matrix can preferably be formed by stainless steel for example by steel, and described coating consists of the first coating 12 and the second coating 13 disposed thereon.As shown in the figure, on the interface of the first coating 12, matrix 11 can have bond layer 14.Described coating has at least taken a part for the cleaning doctor 10 contacting with the roller surface of paper machine.Described cleaning doctor 10 is also included in as contact the inclined-plane in the front end area arranging with roller surface, and it is commonly called blade.Generally, as shown in the figure, described coating covers matrix 11 in the scope of this blade.
The specific embodiment
In the detailed schematic A of described coating within the scope of blade, can find out, described coating has two coatings 12 and 13, the first coating 12 being wherein arranged on matrix is preferably formed by metal material, and this material is applicable to being formed or being comprised such metal by hard metal.The material that is arranged on the second coating 13 in the first coating 12 is polymer.
In a preferred embodiment, with hot-spraying technique, prepare the first coating 12.Preferably carry out multipass (H ü ben) spraying herein, for example 10～100 times.Each,, all over all generating a thinner sublayer (Teillage), wherein directly applies on bond layer 14 thereon and applies the first sublayer on the surface of matrix 11 or before any, and on the sublayer through applying, sprays all the other sublayers before each.The physics homogeney of the first coating 12 can be set by the parameter of method therefor.Using acronym HVOF (High Velocity Oxygen Fuel, HVAF) in the spraying coating process representing, can be for example by selecting the ratio of suitable fuel and oxygen and the feed rate of the suitable powder body material that is used to form coating to avoid forming hole on sublayer.
Commercially available 8～10% cobalt and the tungsten carbide of containing can be used as forming the material of the first coating as the hard metal powder of hard material.Preferably apply so described hard metal powder, so that obtain in approximately 5～8 μ m scopes, the particularly surface roughness of the first coating 12 of 6～7 μ m scopes.Preferably only on part matrix, apply this coating, and in a preferred embodiment, this coating has covered and has been connected to being about the wide region of 20mm and having covered blade of cleaning doctor forward position.
Also for example can use in principle the ceramic material for aluminium oxide, zirconia, magnesia, chromium oxide (III), yittrium oxide and titanate esters to replace metal material to form the first coating.Also can be coated on the matrix of cleaning scraper blade 10 by hot-spraying technique.Conventionally for steel matrix, by guarantee the adhesive force of ceramic coating on matrix 11 with bond layer, the material of this adhesive layer for example can be selected from aluminium, nickel, chromium or the alloy of AlNi or NiCr for example.
After having applied the first coating 12, in its surface can coated polymer as the second coating 13.In this case, described polymer has been filled up the depression that the surface roughness by the first coating 12 causes, and has also caused two connections that coated shape coordinates thus except causing the connection of material fit.
Thermosetting plastics and thermoplastic are suitable polymer, and it can prepare on the basis of one pack system and bi-component.Decomposition temperature is especially applicable to far above the thermosetting plastics of the operating temperature (Einsatztemperatur) of the second coating 13, and this makes this thermosetting plastics have elasticity.Similarly, glass transition temperature is also applicable to far above the thermoplastic of the operating temperature of the second coating 13, and this makes when use is coated with the cleaning doctor 10 of this polymer, and the softening situation of polymer of disturbing can not occur.For the minimum difference between operating temperature and decomposition temperature or glass transition temperature, given value that roughly can reference is 20 ℃.Operating temperature can be interpreted as predetermined
the operating temperature (Betriebstemperatur) of the second coating 13 while using cleaning scraper blade 10.
Epoxy resin and be particularly suitable as polymer with the epoxy resin that embeds filler particles wherein, described filler particles can be for example polyvinyl fluoride (PFE), and is in particular polytetrafluoroethylene (PTFE) (PTFE).Because epoxy resin (benetzt) the first coating 12 with non-crosslinked or partial cross-linked in good condition infiltration, thereby has excellent adhesion thereon.
For example in order to make to spray polymer, become possibility, can be by adding solvent, for example alcohol or ketone reduce the viscosity of epoxy resin.When viscosity is higher, preferably use painting tool, for example brush or scraper apply this polymer.In the situation that using dipping bath (Tauchbad), also can be by carrying out the coating of the first coating surface in its immersion or the polymer of liquid condition.
In a preferred embodiment, the raw material by the mixture of epoxy resin and isobutanol as polymer, this mixture comprises the PTFE particle that average grain diameter is 0.1～5 μ m.In polymer raw material, the content of described epoxy resin between 40～70 % by weight, the content of described isobutanol between 10～60 % by weight and the content of described PTFE particle between 2～20 % by weight.Preferably the mixture of described polymer/solvent is sprayed in the first coating.
Another is preferred embodiment the selection of polymer raw material with aforesaid difference, wherein use the organic silicon polyester resin that mixes isobutanol, and wherein comprising average grain diameter is the PTFE particle of 0.1～5 μ m.In this polymer raw material, the content of described organic silicon polyester resin or between 40～70 % by weight, the content of described isobutanol between 10～60 % by weight and the content of described PTFE particle between 2～20 % by weight.Preferably the mixture of described polymer/solvent is sprayed in the first coating.
After on polymer raw material being coated in to the first coating 12, preferably by its heat cross-linking, thereby the second coating 13 of polymer is formed.
Also can with silicones replace or in conjunction with above-mentioned polymeric material to form the second coating 13.Preferably with low viscous polymer raw material, form relatively thinly, for example thickness is the second coating of 20～approximately 50 μ m, and the thickness of the second coating that the polymer raw material of viscosity higher is corresponding for example can reach 80 μ m.
Polymer surfaces by cleaning doctor coating can reduce the adhesion of dirt on cleaning doctor, thus can be at an easy rate by it above cleaning scraper blade 10 is removed and can be trapped in.Therefore, than traditional design, the cleaning effect of cleaning doctor 10 be improved significantly.Because polymer surfaces has also reduced the friction with roller surface, so described cleaning effect through improving also can keep the time of more growing in addition.Due to the different optical property of the first and second coatings, can also be more easily and identify quickly the damage of coating or expired by life-span of the indicated cleaning doctor of the wearing and tearing of the second coating than traditional cleaning doctor.
Claims (14)
1. for the cleaning doctor of clean paper making machine roller surface, the coating that wherein cleaning doctor (10) has matrix (11) and is covered to small part matrix surface, described coating comprises the first coating (12) and is arranged on the second coating (13) in described the first coating, and described the second coating (13) is formed by polymer.
2. cleaning doctor claimed in claim 1, wherein said polymer comprises epoxy resin.
3. cleaning doctor claimed in claim 1, wherein said polymer comprises organosilicon-mylar.
4. the cleaning doctor described in claim 1,2 or 3 is wherein embedded with filler in described polymer.
5. cleaning doctor claimed in claim 4, wherein said filler comprises polyvinyl fluoride, and comprises polytetrafluoroethylene (PTFE) especially.
6. the cleaning doctor described in claim 4 or 5, wherein said filler, with the form of particle, particularly exists to have the form of the particle of the average grain diameter within the scope of 0.1～5 μ m.
7. cleaning doctor claimed in claim 1, wherein said polymer comprises polyvinyl fluoride, and comprises polytetrafluoroethylene (PTFE) especially.
8. cleaning doctor claimed in claim 1, wherein said polymer comprises silicones.
9. the cleaning doctor described in any one in the claims, the material of wherein said the first coating (12) comprises hard metal.
10. cleaning doctor claimed in claim 8, wherein said hard metal contains 8～10% cobalt and a tungsten carbide as hard material.
Cleaning doctor in 11. claims 1～8 described in any one, the material of wherein said the first coating (12) comprises oxide ceramics.
Cleaning doctor described in 12. claims 11, wherein said oxide ceramics is selected from aluminium oxide, zirconia, magnesia, chromium oxide (III), yittrium oxide and titanate esters.
Cleaning doctor in 13. claims 8～12 described in any one, wherein said the first coating (12) has within the scope of 5～8 μ m and preferred surface roughness within the scope of 6～7 μ m.
Cleaning doctor in 14. the claims described in any one is wherein provided with bond layer (14) on the surf zone of the matrix (11) with described the first coating (12) boundary.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011078745A DE102011078745A1 (en) | 2011-07-06 | 2011-07-06 | DIRT-PROOF PUTZSCHABER |
| DE102011078745.3 | 2011-07-06 | ||
| PCT/EP2012/062993 WO2013004729A2 (en) | 2011-07-06 | 2012-07-04 | Dirt-repellent cleaning scraper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103649412A true CN103649412A (en) | 2014-03-19 |
Family
ID=46420231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280033600.7A Pending CN103649412A (en) | 2011-07-06 | 2012-07-04 | Dirt-repellent cleaning scraper |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20140137361A1 (en) |
| EP (1) | EP2729615B2 (en) |
| CN (1) | CN103649412A (en) |
| DE (1) | DE102011078745A1 (en) |
| WO (1) | WO2013004729A2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108884641A (en) * | 2016-03-31 | 2018-11-23 | Btg埃克勒拜恩斯公司 | The coating blade of masking |
| CN110170436A (en) * | 2019-06-17 | 2019-08-27 | 晋江市兰欣新材料科技有限公司 | A kind of wear-resistant coating and preparation method thereof for stone roll roll surface |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014205614A1 (en) | 2014-03-26 | 2015-05-21 | Voith Patent Gmbh | doctor blade |
| CN105835921B (en) * | 2016-05-25 | 2017-12-12 | 温岭市创嘉信息科技有限公司 | A kind of antifouling food-handling truck |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1317064A (en) * | 1998-09-10 | 2001-10-10 | 麦特索纸业公司 | Doctor blade |
| CN1518495A (en) * | 2001-05-17 | 2004-08-04 | �ָ���ɷ�����˾ | Composite assembly |
| US20050089706A1 (en) * | 2002-01-29 | 2005-04-28 | Kazuya Urata | Surface treated doctor blade |
| CN101563227A (en) * | 2006-08-29 | 2009-10-21 | 达特怀勒瑞士科技股份公司 | Doctor blade |
| DE202009008818U1 (en) * | 2008-06-27 | 2009-11-12 | Metso Paper, Inc. | Blade for a material web machine |
| WO2011035968A1 (en) * | 2009-09-23 | 2011-03-31 | Voith Patent Gmbh | Blade coating |
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| AU485283B2 (en) * | 1971-05-18 | 1974-10-03 | Warner-Lambert Company | Method of making a razorblade |
| SE437683B (en) | 1982-10-13 | 1985-03-11 | Inventing Ab | CREATE OR SHELL - MATERIAL AGAINST THE ROLL - BY EXV |
| SE437681B (en) | 1982-10-13 | 1985-03-11 | Inventing Ab | CREATIVE OR RABLE FOR CONTROLLABLE PAIRING AND EXTRAORDINATION OF APPLIANCES ON A CURRENT PAPER COAT |
| JPH0887196A (en) * | 1994-09-19 | 1996-04-02 | Canon Inc | Fixing device |
| DE69636376T2 (en) * | 1995-05-31 | 2007-07-26 | Canon K.K. | Elastic cutting edge to control developer feed, and this using developing device |
| JP3443519B2 (en) * | 1996-09-30 | 2003-09-02 | 京セラ株式会社 | blade |
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| US6867155B2 (en) * | 1999-10-15 | 2005-03-15 | Kadant Web Systems, Inc. | Non-abrasive composite doctor blade |
| US6684513B1 (en) * | 2000-02-29 | 2004-02-03 | The Gillette Company | Razor blade technology |
| US6643890B2 (en) * | 2000-12-01 | 2003-11-11 | S. D. Warren Services Company | Composite doctor blades |
| SE519466C2 (en) * | 2000-12-07 | 2003-03-04 | Swedev Ab | Schaber or razor blade with nickel coating including abrasion-resistant particles and method of manufacture |
| FIU20010246U0 (en) | 2001-06-15 | 2001-06-15 | Metso Paper Inc | Arrangement for scraping a belt of a paper or board machine or a soft roll cover |
| SE524103C2 (en) | 2002-07-15 | 2004-06-29 | Btg Eclepens Sa | Coating sheet and process for making this |
| SE0403178D0 (en) | 2004-12-28 | 2004-12-28 | Btg Eclepens Sa | Method of manufacturing a coating or doctoring blade |
| DE102008000830A1 (en) | 2008-03-26 | 2009-10-01 | Voith Patent Gmbh | Method for coating a blade, blade coated by the method, and apparatus for coating |
-
2011
- 2011-07-06 DE DE102011078745A patent/DE102011078745A1/en not_active Withdrawn
-
2012
- 2012-07-04 CN CN201280033600.7A patent/CN103649412A/en active Pending
- 2012-07-04 US US14/130,803 patent/US20140137361A1/en not_active Abandoned
- 2012-07-04 WO PCT/EP2012/062993 patent/WO2013004729A2/en active Application Filing
- 2012-07-04 EP EP12731003.5A patent/EP2729615B2/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1317064A (en) * | 1998-09-10 | 2001-10-10 | 麦特索纸业公司 | Doctor blade |
| CN1518495A (en) * | 2001-05-17 | 2004-08-04 | �ָ���ɷ�����˾ | Composite assembly |
| US20050089706A1 (en) * | 2002-01-29 | 2005-04-28 | Kazuya Urata | Surface treated doctor blade |
| CN101563227A (en) * | 2006-08-29 | 2009-10-21 | 达特怀勒瑞士科技股份公司 | Doctor blade |
| DE202009008818U1 (en) * | 2008-06-27 | 2009-11-12 | Metso Paper, Inc. | Blade for a material web machine |
| WO2011035968A1 (en) * | 2009-09-23 | 2011-03-31 | Voith Patent Gmbh | Blade coating |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108884641A (en) * | 2016-03-31 | 2018-11-23 | Btg埃克勒拜恩斯公司 | The coating blade of masking |
| CN108884641B (en) * | 2016-03-31 | 2022-05-03 | Btg埃克勒拜恩斯公司 | Masked coating blade |
| US11466407B2 (en) | 2016-03-31 | 2022-10-11 | Btg Eclepens S.A. | Masked coating blade |
| CN110170436A (en) * | 2019-06-17 | 2019-08-27 | 晋江市兰欣新材料科技有限公司 | A kind of wear-resistant coating and preparation method thereof for stone roll roll surface |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2729615B1 (en) | 2015-05-20 |
| WO2013004729A2 (en) | 2013-01-10 |
| EP2729615A2 (en) | 2014-05-14 |
| WO2013004729A3 (en) | 2013-06-20 |
| EP2729615B2 (en) | 2018-07-04 |
| US20140137361A1 (en) | 2014-05-22 |
| DE102011078745A1 (en) | 2013-01-10 |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140319 |