EP0709190B1 - Beschichtete Druckmaschinenwalzen - Google Patents
Beschichtete Druckmaschinenwalzen Download PDFInfo
- Publication number
- EP0709190B1 EP0709190B1 EP95114989A EP95114989A EP0709190B1 EP 0709190 B1 EP0709190 B1 EP 0709190B1 EP 95114989 A EP95114989 A EP 95114989A EP 95114989 A EP95114989 A EP 95114989A EP 0709190 B1 EP0709190 B1 EP 0709190B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coating
- printing machine
- roller according
- machine roller
- lower layer
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F31/00—Inking arrangements or devices
- B41F31/26—Construction of inking rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F7/00—Rotary lithographic machines
- B41F7/20—Details
- B41F7/24—Damping devices
- B41F7/26—Damping devices using transfer rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N7/00—Shells for rollers of printing machines
- B41N7/04—Shells for rollers of printing machines for damping rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N2207/00—Location or type of the layers in shells for rollers of printing machines
- B41N2207/02—Top layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N2207/00—Location or type of the layers in shells for rollers of printing machines
- B41N2207/10—Location or type of the layers in shells for rollers of printing machines characterised by inorganic compounds, e.g. pigments
Definitions
- the invention relates to printing press rolls according to the preamble of claim 1.
- High quality print is generally based on high quality, very dense and solid Types of paper carried out and partially required Dampening solution film thicknesses on the metering rollers of less than 4 ⁇ m. So far, printing requirements of this type have only been met are about the addition of alcohols to the dampening solution Reduction of surface tension. Most common is Isopropanol for this application and recently also various Glycols, which are marketed as so-called alcohol substitutes arrived. A typical dosage of isopropanol in the The dampening solution is between 10 and 15% by volume. These concentrations of alcohol in the dampening solution lead in larger offset printers, especially with high-performance roller machines, to ensure that the daily alcohol consumption on such machines several 100 l can be.
- the invention is therefore based on the object for Printing machine rollers, especially for the dampening system more modern Printing presses to create roller surfaces that stand out distinguish particularly hydrophilic properties.
- this object is achieved in that that the corresponding roller body is coated with an oxide ceramic coating are, which contains at least for the most part aluminum oxide and silicon oxide in the form of mullite.
- One or more can be coated with the coating according to the invention Rollers of the printing machine, especially the dampening unit become.
- the roller body in printing machines is generally made of structural steels exist without special corrosion protection, it has proven to be Proven useful with the coating according to the invention Mullite, the roller body with a metallic protective layer too coat the elements in comparatively high concentration Nickel, cobalt, iron, molybdenum, chrome, aluminum and yttrium in any, corresponding to the specific corrosion attack Combination contains.
- Both the metallic underlayer, i.e. H. the Protective layer, as well as the oxide ceramic, according to the invention Top layer, d. H. the mullite coating are preferred by thermal spraying, in particular plasma spraying, applied.
- Suitable processes for coating are the PVD processes, incl.
- Electron beam vapor deposition EBPVD
- CVD chemical vapor deposition
- galvanic processes that Diffusion coating processes from the gas phase or the pack
- Sintering the Sintering process
- Hippen hot isostatic pressing process
- Explosive plating and all reactive processes where reactive conversion of applied metal layers (Al, Si, Titan) an oxide layer is created.
- the metallic protective layer with a simultaneous adhesion promoter function is applied by thermal spraying, preferably in a thickness of approximately 0.2 mm, if the roller body consists of non-corrosion-protected structural steel.
- a layer thickness of the metallic protective layer with pure adhesion promoter function of approx. 70 ⁇ m is sufficient.
- the oxide ceramic coating according to the invention is then applied to roll cores coated in this way with a thickness of approximately 0.25 mm, likewise preferably by thermal spraying.
- a dampening roller coated in the manner described, for. B. metering roller, must subsequently to achieve their full functionality with appropriate hydrophilicity, z. B.
- the dampening system according to FIG. 1 is characterized by the Fountain solution 1 (water, slightly acid buffered, pH 5) in one Water box 2, from which the rubberized roller 3 the Dampening solution transport to the transfer roller 4 with the transported ceramic coating according to the invention.
- the transfer roller 4 results there over the entire Bale length is a thin, even film of dampening solution, which in this form transferred to the rubberized dampening roller and from there is transported directly to the printing plate cylinder 8.
- the dampening roller 5 stands with the inking unit on the Intermediate roller 6 in connection. For reasons of simplification, entire inking unit only one inking roller 7 in Fig. 1st shown.
- the invention is not limited to a roller arrangement as in Fig. 1, but it is applicable wherever technical Reasons a special hydrophilic surface property is required becomes.
- the roller body 9 can be made of any materials, such as. B. structural steels or stainless, higher alloyed steels. Of the Cross-section through the coating according to the invention characterized by the roller body 9, the surface of which, for. B. is roughened by abrasive blasting. Roughened on this Roller body surface is an adhesion promoter and against corrosion protective underlayer 10, e.g. B. by thermal spraying, applied. The roughness of this layer 10 with their Undercuts on the surface provides for the actual Functional ceramic 11, the mullite coating according to the invention, the Guarantee for sufficient liability.
- the functional ceramic 11 has Application by thermal spraying residual pores 12, which over the Layer thickness are evenly distributed. These pores 12 in the functional ceramic 11 can be sealed as described above be.
- the functional ceramic 11 has been smoothed to a roughness value of R z 2.0 2.0 ⁇ m before it is used on the surface 13 by grinding and polishing. Furthermore, it is possible to activate the surface 13 with a commercially available plate cleaner before it is used in the printing press. In this activated state, it is possible, for. B. a transfer roller with the coating according to the invention a uniform dampening film of z. B. to achieve only 4 microns without isopropanol in the dampening solution, so that an error-free high-quality print without dampening solution tear is achieved even in continuous operation.
- the layer thickness of the lower layer 10 can fluctuate between 50 ⁇ m and 1 mm, since it can also be used at the same time for the dimensional correction of the roller body diameter.
- the layer thickness of the functional ceramic 11 fluctuates between 0.1 mm and 1.0 mm, depending on the application.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rotary Presses (AREA)
- Coating By Spraying Or Casting (AREA)
- Printing Plates And Materials Therefor (AREA)
Description
- Fig. 1
- zeigt die Walzenanordnung in einem in Offsetdruckmaschinen weit verbreiteten Feuchtungssystem,
- Fig. 2
- zeigt eine Übertragungswalze aus diesem Feuchtungssystem mit der erfindungsgemäßen Beschichtung,
- Fig. 3
- zeigt einen Querschliff zur Walzenoberfläche der Übertragungswalze nach Fig. 2 mit einer Darstellung des Schichtaufbaus.
Claims (18)
- Druckmaschinenwalze, insbesondere Feuchtwalze (4), mit einer oxidkeramischen Beschichtung (11) der gesamten Ballenfläche des Walzenkörpers, dadurch gekennzeichnet, daß die oxidkeramische Beschichtung (11) zumindest zum größten Teil Aluminiumoxid und Siliziumoxid in Form von Mullit enthält.
- Druckmaschinenwalze nach Anspruch 1, dadurch gekennzeichnet, daß die Beschichtung (11) zusätzlich Titanoxid und/oder Chromoxid enthält.
- Druckmaschinenwalze nach Anspruch 1, dadurch gekennzeichnet, daß die Beschichtung (11) durch thermisches Spritzen aufgetragen ist.
- Druckmaschinenwalze nach Anspruch 1, dadurch gekennzeichnet, daß die Beschichtung (11) auf einer Unterschicht (10) aufgebracht ist, die die Elemente Nickel und/oder Kobalt und/oder Eisen und/oder Molybdän und/oder Chrom und/oder Aluminium und/oder Yttrium enthält.
- Druckmaschinenwalze nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Beschichtung (11) eine Dicke von 0,1 mm - 1,0 mm, vorzugsweise 0,5 mm, aufweist, während die Unterschicht (10) eine Dicke von 0,05 mm - 1,0 mm aufweist.
- Druckmaschinenwalze nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Beschichtung (11) eine Oberflächenrauhigkeit von Rz ≤ 4 µm, vorzugsweise Rz ≤ 2,0 µm, aufweist.
- Druckmaschinenwalze nach den Ansprüchen 1 und 4, dadurch gekennzeichnet, daß die Beschichtung (11) und/oder die Unterschicht (10) eine PVD-Schicht ist (Physical Vapour Deposition).
- Druckmaschinenwalze nach den Ansprüchen 1 und 4, dadurch gekennzeichnet, daß die Beschichtung (11) und/oder die Unterschicht (10) eine EBPVD-Schicht ist (Elektronenstrahlbedampfen).
- Druckmaschinenwalze nach den Ansprüchen 1 und 4, dadurch gekennzeichnet, daß die Beschichtung (11) und/oder die Unterschicht (10) eine eine CVD-Schicht ist (Chemical Vapour Deposition).
- Druckmaschinenwalze nach den Ansprüchen 1 und 4, dadurch gekennzeichnet, daß die Beschichtung (11) und/oder die Unterschicht (10) eine Plasma-CVD-Schicht ist (Plasmaunterstütztes CVD).
- Druckmaschinenwalze nach den Ansprüchen 1 und 4, dadurch gekennzeichnet, daß die Beschichtung (11) und/oder die Unterschicht (10) durch ein galvanisches Verfahren aufgetragen sind.
- Druckmaschinenwalze nach den Ansprüchen 1 und 4, dadurch gekennzeichnet, daß die Beschichtung (11) und/oder die Unterschicht (10) durch ein Diffusionsbeschichtungsverfahren aufgetragen sind.
- Druckmaschinenwalze nach den Ansprüchen 1 und 4, dadurch gekennzeichnet, daß die Beschichtung (11) und/oder die Unterschicht (10) durch ein Sinterverfahren aufgetragen sind.
- Druckmaschinenwalze nach den Ansprüchen 1 und 4, dadurch gekennzeichnet, daß die Beschichtung (11) und/oder die Unterschicht (10) durch ein Heißisostatpreßverfahren (Hippen) aufgetragen sind.
- Druckmaschinenwalze nach den Ansprüchen 1 und 4, dadurch gekennzeichnet, daß die Beschichtung (11) und/oder die Unterschicht (10) durch Sprengplattieren aufgetragen sind.
- Druckmaschinenwalze nach Anspruch 1, dadurch gekennzeichnet, daß die Beschichtung (11) durch ein Reaktivverfahren aufgetragen ist, bei dem durch reaktive Umwandlung vorher aufgebrachter Metallschichten aus Aluminium und Silizium und/oder Titan und/oder Chrom eine Oxidschicht entsteht.
- Druckmaschinenwalze nach Anspruch 1, dadurch gekennzeichnet, daß die Oberfläche der Beschichtung (11) nach dem Beschichtungsvorgang durch Schleifen und/oder Polieren geglättet ist.
- Druckmaschinenalze nach Anspruch 1, dadurch gekennzeichnet, daß die Beschichtung (11) zur Verringerung der Porosität mit einem porenverschließenden Mittel versiegelt ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4434765A DE4434765A1 (de) | 1994-09-29 | 1994-09-29 | Beschichtete Druckmaschinenwalzen |
DE4434765 | 1994-09-29 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0709190A1 EP0709190A1 (de) | 1996-05-01 |
EP0709190B1 true EP0709190B1 (de) | 1999-08-18 |
Family
ID=6529478
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95114989A Expired - Lifetime EP0709190B1 (de) | 1994-09-29 | 1995-09-23 | Beschichtete Druckmaschinenwalzen |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0709190B1 (de) |
DE (2) | DE4434765A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19653911C2 (de) * | 1996-12-21 | 2003-03-27 | Roland Man Druckmasch | Druckmaschinenwalze mit einer farbfreundlichen Beschichtung der Ballenfläche des Walzenkerns, insbesondere Farbwalze |
DE102008014034A1 (de) * | 2008-03-13 | 2009-09-24 | Coatec Gesellschaft für Oberflächenveredelung mbH | Walzenkörper mit einem Walzenbezug zur verbesserten Farb-Wasser-Emulsionsbildung in Druckwerken von Nassoffsetmaschinen und Verfahren zu dessen Herstellung |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3168037A (en) * | 1960-05-02 | 1965-02-02 | Harold P Dahlgren | Means for dampening lithographic offset printing plates |
DE2348717B1 (de) * | 1973-09-28 | 1975-03-20 | Weitmann & Konrad | Verfahren zur Erhoehung der Benetzbarkeit von feuchtmittelfuehrenden Flaechen in Druckmaschinen |
US4069570A (en) * | 1975-01-27 | 1978-01-24 | Adamovske Strojirny, Narodni Podnik | Cylinders and rollers for printing machines |
DE2602277A1 (de) * | 1975-01-27 | 1976-07-29 | Adamovske Strojirny Np | Druckmaschinen-zylinder |
DD154081A1 (de) * | 1980-12-15 | 1982-02-24 | Heiner Fink | Verfahren zum herstellen von oberflaechenschichten fuer feuchtwalzen |
JPH0698851B2 (ja) * | 1988-06-15 | 1994-12-07 | 新日本製鐵株式会社 | 平版印刷機の湿し水給水ローラ |
US4932319A (en) * | 1988-10-26 | 1990-06-12 | Ryco Graphic Manufacturing, Inc. | Spray dampening system for offset press |
DE4321183C2 (de) * | 1992-07-09 | 2002-12-12 | Heidelberger Druckmasch Ag | Feuchtwerkswalze einer Druckmaschine |
DE4229700C2 (de) * | 1992-09-05 | 1997-02-13 | Heidelberger Druckmasch Ag | Feuchtwerkswalze für eine Druckmaschine sowie Verfahren zu ihrer Beschichtung |
DE4242620A1 (de) * | 1992-12-17 | 1994-06-23 | Coatec Ges Fuer Oberflaechenve | Hydrophiler Keramiküberzug für Feuchtwalzen in Druckmaschinen |
-
1994
- 1994-09-29 DE DE4434765A patent/DE4434765A1/de not_active Withdrawn
-
1995
- 1995-09-23 EP EP95114989A patent/EP0709190B1/de not_active Expired - Lifetime
- 1995-09-23 DE DE59506636T patent/DE59506636D1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
Ullmann's Encyclopedia of Industrial Chemistry, 5. Auflage, Band 23, Seiten 694 bis 696 * |
Also Published As
Publication number | Publication date |
---|---|
DE4434765A1 (de) | 1996-04-04 |
DE59506636D1 (de) | 1999-09-23 |
EP0709190A1 (de) | 1996-05-01 |
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