EP0095608A2 - Rouleau presseur et procédé pour sa fabrication - Google Patents

Rouleau presseur et procédé pour sa fabrication Download PDF

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Publication number
EP0095608A2
EP0095608A2 EP83104555A EP83104555A EP0095608A2 EP 0095608 A2 EP0095608 A2 EP 0095608A2 EP 83104555 A EP83104555 A EP 83104555A EP 83104555 A EP83104555 A EP 83104555A EP 0095608 A2 EP0095608 A2 EP 0095608A2
Authority
EP
European Patent Office
Prior art keywords
counterpressure
ceramic
layer
weight
coating
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.)
Withdrawn
Application number
EP83104555A
Other languages
German (de)
English (en)
Other versions
EP0095608A3 (fr
Inventor
Siegfried Wiedemann
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.)
Belserdruck Chr Belser & Co KG GmbH
Original Assignee
Belserdruck Chr Belser & Co KG GmbH
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 Belserdruck Chr Belser & Co KG GmbH filed Critical Belserdruck Chr Belser & Co KG GmbH
Publication of EP0095608A2 publication Critical patent/EP0095608A2/fr
Publication of EP0095608A3 publication Critical patent/EP0095608A3/fr
Withdrawn legal-status Critical Current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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/18—Impression cylinders
    • 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 an electrically insulated counterpressure for a three-roll system of a rotogravure printing press, which is equipped with means for carrying out a so-called electrostatic pressure support method.
  • the invention further relates to a method for producing the new counterpressor.
  • the printing unit of a rotogravure printing press usually consists of the printing cylinder and the cylindrical rubber press (two-roll system) arranged above the printing cylinder.
  • the paper web is passed between the rubber press and the printing cylinder, the color in the cups of the printing cylinder being transferred to the paper.
  • the rubber presser is equipped with an elastic surface layer and has the task of pressing the paper web against the printing cylinder with relatively high pressure, so that the ink is as completely as possible from the printing cylinder surface onto the paper is transmitted.
  • a cylindrical, so-called steel or counterpressure is arranged above the rubber presser, which can be pressed onto the surface of the rubber presser (three-roller system) and the pressure of the rubber presser on the pressure cylinder supported.
  • An electrostatic printing aid process is used not only to improve poor ink transfer (missing dots), but also to reduce the contact pressure of the impressionists if the ink transfer is satisfactory, so that their wear is reduced and energy consumption can be reduced.
  • the electrostatic pressure support processes have become increasingly popular in recent years.
  • cavity zones between the plastic layer and the surface of the steel cylinder in which water can even accumulate. These zones significantly reduce the insulation value of the coating. The water also causes corrosion in the surface of the steel cylinder.
  • the cavity zones also reduce heat dissipation from the rubber press to the counterpressor.
  • the counterpressor is known to be water-cooled so that it can better absorb and dissipate the heat generated by the flexing of the rubber presser.
  • the plastic coating hinders the heat flow anyway.
  • the heat flow is also disrupted by the cavity zones.
  • a little remedy is provided by a higher contact pressure, which in turn results in higher energy consumption and higher wear, so that the intended purpose of the electrostatic pressure support method, namely the lowering of the contact pressure, is often not achieved can be.
  • the object of the invention is to provide a wear-resistant counterpressure suitable for the application of an electrostatic pressure support method with simple means, which does not have the disadvantages of known impressioners described.
  • a counterpressure consisting of a preferably water-cooled steel cylinder with an electrically insulating jacket, which is characterized in that the jacket consists of ceramic.
  • An adhesion promoter layer is expediently arranged between the steel surface of the counterpressor and the ceramic layer.
  • the ceramic coating is / preferably from 1.0 to 2.0 mm thick.
  • the adhesion promoter layer is preferably from 0.2 to 0.6 mm.
  • the ceramic layer consists essentially of A1 2 0 3 with small amounts of TiO 2 , SiO 2 and Fe203, preferably 94% by weight A1 2 0 3 , 2.5% by weight TiO 2 , 2 , 0 wt% Si0 2 and 1.5 wt% Fe 2 0 3 .
  • the adhesion promoter layer consists essentially of nickel with small proportions of aluminum.
  • the adhesive layer of 95, 5 wt .-% Ni and 4.5 wt .-% A l.
  • the method according to the invention for producing the new counterpressor is characterized in that the ceramic layer and / or the adhesion promoter layer are applied by a flame spraying method known per se.
  • the flame spraying process is a powder spraying process.
  • the powder is applied with a spray gun, in which it flows through the use of gravity through a metering valve and is then taken up by an aspirator chamber at reduced pressure. From here, the powder is whirled through the spray flame, in which it is melted and forms a spray on the workpiece builds up layer.
  • An acetylene oxygen or a hydrogen-oxygen mixture can be used for the spray flame.
  • the invention provides that the powder to be sprayed is kept in motion for metering, in particular by stirring, so that the flame spray flow is not interrupted.
  • the ceramic surface is sealed with plastic or a varnish, so that the porosity of the ceramic layer, if any, is at least superficially closed, so that no color components or similar chemicals that may have been transferred from the rubber presser can penetrate into the ceramic coating, thereby reducing its insulating ability could be affected.
  • the ceramic surface is preferably sealed before the grinding, the grinding being carried out in such a way that the pore sealing is retained.
  • the flame spraying process creates a ceramic coating that ensures excellent insulation and high wear resistance. Detachment of the coating from the metal surface and imbalance do not occur. In addition, the new coating has very good thermal conductivity, so that the printing unit remains cold despite the flexing of the rubber press. The latter also leads to higher rewinding numbers for the rubber presser.
  • contact pressure of the new counterpressor can be reduced considerably, whereby the same color transmission quality is nevertheless achieved. It can e.g. B. contact pressures of about 1 kp / cm2 can be selected, while in conventional, plastic-coated counterpressors to achieve the same print quality, contact pressures of about 3.5 kp / an 2 must be set. What this surprising effect results from is not known. The resulting advantages are less wear and tear on the printing unit and considerable reduction in energy consumption as well as greater effectiveness of the electrostatic printing aid.
  • the color transfer of the paper is excellent when using the new counterpressor at low contact pressures and cannot be achieved with conventional printing units.
  • the new counterpressor is explained in more detail with the aid of the drawing.
  • the schematically depicted three-roll printing unit of a rotogravure printing press has the impression cylinder 1, the rubber press 2 and the counterpressure 3. Between the rubber press 2 and the printing cylinder 1, the paper web 4 is carried out.
  • the means for executing the electrostatic pressure support method are not shown in order to maintain the clarity of the drawing.
  • the counterpressure consists of the steel cylinder 5, on which a metal alloy is applied as an adhesion promoter layer 6, on which in turn a ceramic layer 7 is arranged.
  • the surface of the ceramic layer 7 is ground.
  • the ceramic layer 7 is firmly connected to the adhesion promoter layer 6 in the manner of a sinter, while the adhesion promoter layer is connected to the surface of the steel cylinder 5 in the manner of an alloy.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Laminated Bodies (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
EP83104555A 1982-06-01 1983-05-09 Rouleau presseur et procédé pour sa fabrication Withdrawn EP0095608A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3220534 1982-06-01
DE19823220534 DE3220534C2 (de) 1982-06-01 1982-06-01 Gegenpresseur sowie Verfahren zu seiner Herstellung

Publications (2)

Publication Number Publication Date
EP0095608A2 true EP0095608A2 (fr) 1983-12-07
EP0095608A3 EP0095608A3 (fr) 1985-03-13

Family

ID=6164979

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83104555A Withdrawn EP0095608A3 (fr) 1982-06-01 1983-05-09 Rouleau presseur et procédé pour sa fabrication

Country Status (2)

Country Link
EP (1) EP0095608A3 (fr)
DE (1) DE3220534C2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0199084A1 (fr) * 1985-04-03 1986-10-29 Winfried Heinzel Rouleau et gaine de rouleau d'impression et leur procédé de fabrication
WO1995029812A1 (fr) * 1994-05-03 1995-11-09 American Roller Company Rouleau ceramique destine aux systemes de revetement et d'impression electrostatique

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4601242A (en) * 1985-02-04 1986-07-22 Rockwell International Corporation Copper and ceramic composite ink metering roller
US4794680A (en) * 1985-12-20 1989-01-03 Union Carbide Corporation Novel wear-resistant laser-engraved ceramic or metallic carbide surfaces for friction rolls for working elongate members, method for producing same and method for working elongate members using the novel friction roll

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE696905C (de) * 1939-05-20 1940-10-02 Maschf Augsburg Nuernberg Ag Rotationstiefdruckmaschine
US3477369A (en) * 1967-05-04 1969-11-11 Hurletron Inc Electrostatically assisted intaglio printing
FR2151920A5 (fr) * 1971-08-27 1973-04-20 Maschf Augsburg Nuernberg Ag
DE2602277A1 (de) * 1975-01-27 1976-07-29 Adamovske Strojirny Np Druckmaschinen-zylinder

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE696905C (de) * 1939-05-20 1940-10-02 Maschf Augsburg Nuernberg Ag Rotationstiefdruckmaschine
US3477369A (en) * 1967-05-04 1969-11-11 Hurletron Inc Electrostatically assisted intaglio printing
FR2151920A5 (fr) * 1971-08-27 1973-04-20 Maschf Augsburg Nuernberg Ag
DE2602277A1 (de) * 1975-01-27 1976-07-29 Adamovske Strojirny Np Druckmaschinen-zylinder

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0199084A1 (fr) * 1985-04-03 1986-10-29 Winfried Heinzel Rouleau et gaine de rouleau d'impression et leur procédé de fabrication
WO1995029812A1 (fr) * 1994-05-03 1995-11-09 American Roller Company Rouleau ceramique destine aux systemes de revetement et d'impression electrostatique
AU691247B2 (en) * 1994-05-03 1998-05-14 American Roller Company, Llc Ceramic roller for esa printing and coating

Also Published As

Publication number Publication date
DE3220534C2 (de) 1984-03-22
EP0095608A3 (fr) 1985-03-13
DE3220534A1 (de) 1983-12-08

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Inventor name: WIEDEMANN, SIEGFRIED