EP0732206A2 - Rouleau des presses, notamment rouleau d'encrage - Google Patents

Rouleau des presses, notamment rouleau d'encrage Download PDF

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Publication number
EP0732206A2
EP0732206A2 EP96103727A EP96103727A EP0732206A2 EP 0732206 A2 EP0732206 A2 EP 0732206A2 EP 96103727 A EP96103727 A EP 96103727A EP 96103727 A EP96103727 A EP 96103727A EP 0732206 A2 EP0732206 A2 EP 0732206A2
Authority
EP
European Patent Office
Prior art keywords
coating
printing machine
roller according
machine roller
molybdenum
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
Application number
EP96103727A
Other languages
German (de)
English (en)
Other versions
EP0732206B1 (fr
EP0732206A3 (fr
Inventor
Gerhard Dr. Johner
Martin Endisch
Peter Knauer
Karl-Heinz Müller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Manroland AG
Original Assignee
MAN Roland Druckmaschinen AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0732206A2 publication Critical patent/EP0732206A2/fr
Publication of EP0732206A3 publication Critical patent/EP0732206A3/fr
Application granted granted Critical
Publication of EP0732206B1 publication Critical patent/EP0732206B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B41N7/06—Shells for rollers of printing machines for inking rollers
    • 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
    • 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 machine rollers, in particular ink rollers of offset machines, and preferably ink rubbing cylinders there, which are provided with a coating on their surface.
  • ink rollers of offset machines and preferably ink rubbing cylinders there, which are provided with a coating on their surface.
  • surfaces that must be easily wettable with oils, mineral oil and mineral oil-bound substances, such as offset inks.
  • these surfaces must be very water-repellent, since otherwise the color film - known as bare running - can be torn open.
  • the inking unit has the task of transferring a thin, uniformly closed ink film to the printing plate cylinder.
  • the ink is transported using a complex roller system.
  • the ink quantity is regulated zonally via so-called ink knives, which are set against an inking roller
  • the further ink transport takes place via a so-called ink lifter or directly via an intermediate roller into the inking unit.
  • the inking unit itself consists of several rollers, some of which still ensure cross-rubbing and ultimately have the task of supplying the ink rollers in direct contact with the printing plate in a defined manner with the necessary ink quantity.
  • the inking units are essentially off Roller combinations consisting of a rubber roller and a polyamide roller.
  • a common brand name for the polyamide coatings of these polyamide rollers is Rilsan. As a rule, these Rilsan coatings are available in thicknesses of 0.3 mm to 1.0 mm. This material has thermal conductivity values in the range of 0.22 to 0.25 W / mK. A very low thermal conductivity now means that the internal temperature, for example by tempered water, is very limited in its effectiveness for the ink film on the roller.
  • the information absolutely necessary for the temperature control system namely the color film temperature, is usually very late and strongly dampened and transferred to the temperature control medium due to the strong thermal insulation of the Rilsan layer. This means that the control speed and accuracy of the system is severely restricted.
  • the invention is therefore based on the object of finding a color-friendly coating of printing machine rollers, in particular inking rollers, which is comparable to Rilsan and which additionally has excellent thermal conductivity and, moreover, has a high wear resistance which cannot be achieved with copper layers previously used.
  • a coating which contains the elements molybdenum and tungsten in each case 50%, or in each case molybdenum at least 50% or tungsten at least 50% with alloyable elements mixed, contains as an alloy portion, or consists entirely of one of the two elements molybdenum or tungsten.
  • the elements alloyable with molybdenum and / or tungsten can be, for example, iron, chromium or nickel.
  • the ink film has an extraordinarily good ink film stability, even under extreme offset conditions (minimal ink take-up, large open spaces), so that the feared bare running of the ink rollers no longer occurs.
  • Molybdenum is characterized by a thermal conductivity value in the range of 140 W / mK. With around 150 W / mK, tungsten is still a bit higher. In connection with the possibility of processing these two elements into comparatively thin layers of only 0.05mm to 0.25mm, preferably 0.1mm thick, measurements of the thermal conductivity resulted in values that are about three orders of magnitude higher than those of the Rilsan coatings used previously a thickness of 0.3mm.
  • One or more rollers of the inking unit of a printing press can be provided with the coating according to the invention, but experience has shown that it is particularly advantageous to coat the inking rollers.
  • Molybdenum is also a very corrosion-resistant material that is used in particular in chemical plant construction due to this property. Since the roller cores in printing machines are generally made of structural steel without special corrosion protection, it has been shown that the coating according to the invention also represents excellent corrosion protection.
  • the single figure shows a highly schematic structure of an inking roller 1, the roller core 2 of which, according to the invention, is coated with a coating 3 of the entire bale surface.
  • the coating 3 according to the invention is preferably to be used in the ground state with a roughness of R z ⁇ 8 ⁇ m. Depending on the application, it can be advantageous to change this roughness.
  • the coating according to the invention is preferably applied by thermal spraying, in particular plasma spraying.
  • Other processes suitable for producing the coating 3 are the PVD processes, including electron beam vapor deposition (EBPVD), the CVD processes, the plasma-assisted CVD processes, the galvanic processes, the diffusion processes from the gas phase or the pack, the sintering processes, the Hot isostatic pressing processes, explosive plating and all reactive processes in which the coating according to the invention is formed by deposition from two liquid or gas phases.
  • EBPVD electron beam vapor deposition
  • CVD chemical vapor deposition
  • the galvanic processes the diffusion processes from the gas phase or the pack
  • the sintering processes the Hot isostatic pressing processes
  • explosive plating explosive plating and all reactive processes in which the coating according to the invention is formed by deposition from two liquid or gas phases.
  • Subsequent sealing of the coating according to the invention with a color-friendly synthetic resin has proven expedient with the desired, comparatively high roughness of the coating. In this way it is avoided

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP96103727A 1995-03-17 1996-03-09 Rouleau des presses avec un couchage amoureux de l'encre Expired - Lifetime EP0732206B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19509741A DE19509741A1 (de) 1995-03-17 1995-03-17 Druckmaschinenwalze, insbesondere Farbwalze
DE19509741 1995-03-17

Publications (3)

Publication Number Publication Date
EP0732206A2 true EP0732206A2 (fr) 1996-09-18
EP0732206A3 EP0732206A3 (fr) 1997-08-27
EP0732206B1 EP0732206B1 (fr) 1999-12-22

Family

ID=7756972

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96103727A Expired - Lifetime EP0732206B1 (fr) 1995-03-17 1996-03-09 Rouleau des presses avec un couchage amoureux de l'encre

Country Status (2)

Country Link
EP (1) EP0732206B1 (fr)
DE (2) DE19509741A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2757447A1 (fr) * 1996-12-21 1998-06-26 Roland Man Druckmasch Rouleau de machine d'impression comportant un revetement, receptif pour l'encre, situe sur la surface du coeur du rouleau, notamment un rouleau encreur

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2343283C2 (de) * 1973-08-28 1983-07-14 Metallurgik GmbH, 6078 Neu-Isenburg Anwendung des Plasmaspritzens von oxidkeramischen Schichten sowie Haftschichten auf Druckwalzen und Druckplatten
DD136480A1 (de) * 1978-05-26 1979-07-11 Herbert Patzelt Ein-oder mehrschichtiger mantel fuer bogenfuehrende zylinder
DE3316348C2 (de) * 1983-05-05 1985-03-07 PTG Plasma-Oberflächentechnik GmbH, 7240 Horb Verfahren zum Beschichten eines Werkstückes
DE3608286A1 (de) * 1985-04-03 1986-10-09 Winfried 7758 Meersburg Heinzel Verfahren zur oberflaechenbehandlung eines druckmaschinenzylinders, druckmaschinenzylinder sowie verwendung derselben
SE447362B (sv) * 1985-06-14 1986-11-10 Kanthal Dev Ab Schaberklinga
JP2635046B2 (ja) * 1987-05-27 1997-07-30 株式会社 東京機械製作所 平版印刷機のインキ装置用ローラーおよび平版印刷機のインキ装置用ローラーの製造方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2757447A1 (fr) * 1996-12-21 1998-06-26 Roland Man Druckmasch Rouleau de machine d'impression comportant un revetement, receptif pour l'encre, situe sur la surface du coeur du rouleau, notamment un rouleau encreur

Also Published As

Publication number Publication date
DE19509741A1 (de) 1996-09-19
EP0732206B1 (fr) 1999-12-22
EP0732206A3 (fr) 1997-08-27
DE59603943D1 (de) 2000-01-27

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