EP0262137A1 - Verschleissfester rakel. - Google Patents
Verschleissfester rakel.Info
- Publication number
- EP0262137A1 EP0262137A1 EP86903685A EP86903685A EP0262137A1 EP 0262137 A1 EP0262137 A1 EP 0262137A1 EP 86903685 A EP86903685 A EP 86903685A EP 86903685 A EP86903685 A EP 86903685A EP 0262137 A1 EP0262137 A1 EP 0262137A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coating
- molybdenum
- fact
- doctor blade
- article
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F9/00—Rotary intaglio printing presses
- B41F9/06—Details
- B41F9/08—Wiping mechanisms
- B41F9/10—Doctors, scrapers, or like devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F9/00—Rotary intaglio printing presses
- B41F9/06—Details
- B41F9/08—Wiping mechanisms
- B41F9/10—Doctors, scrapers, or like devices
- B41F9/1072—Blade construction
Definitions
- the invention relates to cold rolled, heat-treated and hardened steel strip articles. More precisely the invention aims to improve the wear resistance and friction properties of such cold rolled steel strip articles which are exposed to abraison.
- the invention concerns coated scraper or doctor blades, for example for smoothing out a coating material on a continuous paper web or the scraping clean of rollers for creping, removal or scraping clean of surplus paint on photogravure rollers, anilax rollers and similar machine parts.
- the wearing out time for cold rolled steel strip coating scrapers is normally about. hours if the scraper is not coated with some wear or friction reducing coating. When the scraper is worn, the coating becomes faulty, and therefore the paper line must be stopped for replacement. For self-evident reasons it is desirable to increase the life of the scrapers, not in the first place in order to reduce the cost of the scrapers but in order to reduce the down times of the paper machine.
- the object of the invention is to offer an improved solution to the above problems.
- One aim is thus to improve the wear resistance and friction properties of a scraper or doctor blade in the shape of a chamfered, coated steel strip for smoothing out a coating material on a continuous paper web or for scraping rollers clean, i.e. a product which in its employment is exposed to wear which can put at risk the function of the product and/or reduce its active life. It is also an aim to reduce the energy requirement with the use of the product.
- the coating consists of molybdenum or a molybdenum alloy consisting mainly of molybdenum and covering at least a part of the scraper or doctor blade's surface.
- the layer thickness of the coating can vary but generally amounts to between 0.02 and 0.5 mm, which can correspond to between 10 and 100% of the thickness of the steel strip.
- the coating is limited essentially only to that part of the blade or corresponding element which is exposed to wear during work, preferably the face area or face areas and/or the area up to the leading edge of the face area or face areas, in a way which in itself is conventional.
- Fig. 1 shows a cross section of a printing press doctor blade which has been coated with a wearing course
- Fig. 2 shows in diagrammic form the wear as a function of the time for different coatings.
- a doctor blade in general is marked with the numeral 7.
- the blade's dimensions are considerably increased in the drawing. It consists of a thin cold rolled strip 8 with a face area 9.
- the face -_rea 9 is coated with a wearing layer 10.
- the wearing layer also covers with a part 11 the area up to the leading edge 12 of the face area 9.
- the material in the doctor blades 8 consisted of a carbon steel (quality UH_r ⁇ 20C) with hardness about 530 HV.
- the scraper blades had the following dimensions: thickness 0.38 mm, width 45 mm, length 225 mm.
- the scraper blades 8 were clad with the wearing layers 10 and 11 of varying composition. After coating, the coating surfaces were ground to the thicknesses which can be seen in Table 1.
- the table also contains information about the composition of the coating layer and the wearing down expressed as weight loss a ter 30 rain.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
- Coating Apparatus (AREA)
- Printing Plates And Materials Therefor (AREA)
- Road Paving Machines (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT86903685T ATE52731T1 (de) | 1985-06-14 | 1986-06-06 | Verschleissfester rakel. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8502954 | 1985-06-14 | ||
SE8502954A SE447362B (sv) | 1985-06-14 | 1985-06-14 | Schaberklinga |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0262137A1 true EP0262137A1 (de) | 1988-04-06 |
EP0262137B1 EP0262137B1 (de) | 1990-05-16 |
Family
ID=20360573
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86903685A Expired - Lifetime EP0262137B1 (de) | 1985-06-14 | 1986-06-06 | Verschleissfester rakel |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0262137B1 (de) |
JP (1) | JPS62503085A (de) |
KR (1) | KR870700515A (de) |
AU (1) | AU5966386A (de) |
BR (1) | BR8607112A (de) |
DE (1) | DE3671193D1 (de) |
FI (1) | FI875167A (de) |
SE (1) | SE447362B (de) |
WO (1) | WO1986007309A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6687950B1 (en) | 1998-06-09 | 2004-02-10 | Metso Paper, Inc. | Doctor blade and blade holder comprising composite material and ceramic coating |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DK0728579T3 (da) * | 1995-02-27 | 1999-03-22 | Rolf Meyer | Rakel til dybtryk-rotationsmaskiner samt fremgangsmåde og anordning til dens fremstilling |
DE19509741A1 (de) * | 1995-03-17 | 1996-09-19 | Roland Man Druckmasch | Druckmaschinenwalze, insbesondere Farbwalze |
FR2733720B1 (fr) * | 1995-05-05 | 1997-07-25 | Heidelberg Harris Sa | Lame de machine rotative a imprimer offset |
FR2740386B1 (fr) * | 1995-10-26 | 1998-01-16 | Heidelberg Harris Sa | Lame d'encrier subdivisee en zones pour une machine rotative a imprimer |
SE506563C2 (sv) * | 1996-05-02 | 1998-01-12 | Btg Eclepens Sa | Kräppningsblad |
US5753076A (en) * | 1997-02-03 | 1998-05-19 | Kimberly-Clark Worldwide, Inc. | Method for creping tissue |
ES2171808T3 (es) | 1997-10-24 | 2002-09-16 | Daetwyler Ag | Rascador para eliminar el exceso de tinta de imprenta de la superficie de una placa de imprenta. |
SE0000215L (sv) | 2000-01-25 | 2001-07-26 | Btg Eclepens Sa | Rakelknive |
SE519466C2 (sv) | 2000-12-07 | 2003-03-04 | Swedev Ab | Schaber - eller rakelblad med beläggning av nickel innefattandes nötningsbeständiga partiklar och metod vid dess framställning |
US6546861B2 (en) | 2001-07-30 | 2003-04-15 | Goss Graphic Systems, Inc. | Printing press scraping blade |
KR20030033562A (ko) * | 2001-10-24 | 2003-05-01 | 김창준 | 닥터블레이드 |
DE10222453A1 (de) * | 2002-05-22 | 2003-12-04 | Voith Paper Patent Gmbh | Verfahren zur Oberflächenbehandlung eines Rakelelementes |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ZA703701B (en) * | 1969-06-16 | 1971-01-27 | Norton Co | Doctor blade |
US3688336A (en) * | 1970-07-16 | 1972-09-05 | Lodding Engineering Corp | Extended-life doctoring apparatus |
US3703019A (en) * | 1970-10-15 | 1972-11-21 | Norton Co | Surface conforming wear resistant doctor blade for rolls |
SU850750A1 (ru) * | 1979-07-24 | 1981-07-30 | Ленинградский Технологическийинститут Целлюлозно-Бумажнойпромышленности | Электролит дл осаждени МОлибдЕНОВыХ пОКРыТий |
DE3110842A1 (de) * | 1981-03-20 | 1982-09-30 | Basf Ag, 6700 Ludwigshafen | Rakel fuer den tiefdruck mit kunststoff-druckschichten |
SE437683B (sv) * | 1982-10-13 | 1985-03-11 | Inventing Ab | Schaber eller rakel - anliggande mot valsen - vid exv tryck-, ferg-, eller kreppning |
SE437681B (sv) * | 1982-10-13 | 1985-03-11 | Inventing Ab | Schaber eller rakel for kontrollerbar paforing och utjemning av bestrykningsmedel pa en lopande pappersbana |
-
1985
- 1985-06-14 SE SE8502954A patent/SE447362B/sv not_active IP Right Cessation
-
1986
- 1986-06-06 BR BR8607112A patent/BR8607112A/pt unknown
- 1986-06-06 DE DE8686903685T patent/DE3671193D1/de not_active Expired - Fee Related
- 1986-06-06 AU AU59663/86A patent/AU5966386A/en not_active Abandoned
- 1986-06-06 JP JP61503333A patent/JPS62503085A/ja active Pending
- 1986-06-06 EP EP86903685A patent/EP0262137B1/de not_active Expired - Lifetime
- 1986-06-06 WO PCT/SE1986/000265 patent/WO1986007309A1/en active IP Right Grant
-
1987
- 1987-01-30 KR KR870700080A patent/KR870700515A/ko not_active Application Discontinuation
- 1987-11-23 FI FI875167A patent/FI875167A/fi not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO8607309A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6687950B1 (en) | 1998-06-09 | 2004-02-10 | Metso Paper, Inc. | Doctor blade and blade holder comprising composite material and ceramic coating |
Also Published As
Publication number | Publication date |
---|---|
SE8502954D0 (sv) | 1985-06-14 |
KR870700515A (ko) | 1987-12-29 |
EP0262137B1 (de) | 1990-05-16 |
DE3671193D1 (de) | 1990-06-21 |
SE447362B (sv) | 1986-11-10 |
FI875167A0 (fi) | 1987-11-23 |
BR8607112A (pt) | 1988-02-23 |
FI875167A (fi) | 1987-11-23 |
AU5966386A (en) | 1987-01-07 |
JPS62503085A (ja) | 1987-12-10 |
WO1986007309A1 (en) | 1986-12-18 |
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Legal Events
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