EP0322423A1 - Procede de production de revetements resistants a l'abrasion, notamment de rouleaux canneles en spirales - Google Patents

Procede de production de revetements resistants a l'abrasion, notamment de rouleaux canneles en spirales

Info

Publication number
EP0322423A1
EP0322423A1 EP19880900362 EP88900362A EP0322423A1 EP 0322423 A1 EP0322423 A1 EP 0322423A1 EP 19880900362 EP19880900362 EP 19880900362 EP 88900362 A EP88900362 A EP 88900362A EP 0322423 A1 EP0322423 A1 EP 0322423A1
Authority
EP
European Patent Office
Prior art keywords
layer
ink transfer
transfer roller
hard material
protective 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.)
Granted
Application number
EP19880900362
Other languages
German (de)
English (en)
Other versions
EP0322423B1 (fr
Inventor
Wolfgang Schauer
Günter EISNER
Kurt Zecher
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.)
Kurt Zecher GmbH
Original Assignee
Kurt Zecher 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 Kurt Zecher GmbH filed Critical Kurt Zecher GmbH
Publication of EP0322423A1 publication Critical patent/EP0322423A1/fr
Application granted granted Critical
Publication of EP0322423B1 publication Critical patent/EP0322423B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • 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 ink transfer roller with an abrasion-resistant coating and the coating method, wherein depressions are made in a jacket layer of the ink transfer roller and this is galvanically coated with a protective layer made of more abrasion-resistant material.
  • an ink transfer roller is known, the outer layer of which is preferably made of copper and recesses have been made in the surface of the roller, after which an anodic polishing was carried out, and a hard chrome layer has been electroplated on the surface.
  • Ink transfer rollers of this type are subject to considerable wear and tear in application operation, since the ink particles and the paper surface of the paper to be printed have an abrasive effect.
  • the applied protective layer consists of a tough metal, are embedded in the hard material grains, the grain size is about 1 to 3 microns, and that the protective layer has a layer thickness that is about 1 to 3 times that Grain size corresponds.
  • the process and the coating produced with it can also be used advantageously for other applications if, in addition to a high abrasion resistance, a low surface roughness is required relative to the grain size of the hard material grains or if abrasive wear occurs due to very fine-grained materials, particularly in paste form or if chemically aggressive wear materials are present.
  • a bumpered hard material deposits nickel layer is very z * er and impact-resistant and much more resistant to wear in the ink roller operation as the previously known hard chrome coating.
  • the nickel comprising the hard material particles is slowly broken down by abrasive wear and a chemical action of the colored grains, so that the hard material particles gradually release each time they are completely released
  • the type of coating with a hard chrome seal on the tough, hard material-bearing layer can also be used advantageously for other purposes, since the hard chrome leads to a very smooth surface.
  • This smoothing of the surface has been shown to be completely surprising, since it is generally known that when electroplating a chrome layer, where there are bumps due to foreign particles in a substrate, these lead to hole formation or tip formation in the chrome, but this applies to the hard material particles which with the nickel layer during the electroplating is not the case, as extensive practical tests have shown.
  • the storage of hard materials is expediently carried out in a basic nickel electroplating bath, a constant concentration of the hard material particles to be kept in suspension being produced. Because of the small size of the hard material particles, this can be achieved by constant circulation of the electroplating bath and the suspended matter. As a result, a correspondingly uniformly distributed incorporation of the particles in the galvanized layer, in particular in the case of an ink transfer roller as a whole, is achieved, so that the coloring is completely uniform.
  • Silicon carbide can be used as hard material. Silicon nitride, silicon oxide, Kornud, worfram carbide, diamond dust etc. can also be used.
  • ERS ⁇ TZBkATT 1 to 5 show details of the inking roller and the galvanized coatings.
  • Fig. 1 shows an ink transfer roller greatly reduced
  • Fig. 2 shows a greatly enlarged top view of the surface of an ink transfer roller
  • FIG. 3 shows a cross-section of FIG. 2:
  • Fig. 4 shows a further embodiment of a cross section in a larger magnification as Fig. 3;
  • Fig. 1 shows a reduced ink transfer roller. It consists of a steel body (2) with a shaft (3) onto which a copper jacket (1) is shrunk or galvanized. The surface (4) of the jacket (1) is shown greatly enlarged in Fig. 2. It is provided with depressions (V) by knurling or preferably by embossing, which preferably has a trapezoidal cross section with a flat bottom (B) and with narrow webs (S) between them in relation to the width (W) of the depressions. The distance from deepening to deepening is the so-called grid spacing (R), which is used for high-quality rollers e.g. Is 70 ⁇ m. After the recesses (V) have been mechanically introduced, any burr that may be formed is expediently removed by galvanic polishing.
  • V grid spacing
  • FIG. 3 shows a cross section to FIG. 2 after the application of the layer (10) with the hard material granule embedding on the copper base ( 1) with the depressions (V).
  • the applied layer (10) has a thickness (D) of about 10 ⁇ , which corresponds to about 1 to 2 times the web width (SB) and is a multiple of the maximum grain size (K) of the hard materials (H), which is about Is 1 to 3 mu.
  • the volume fraction of the hard material grains in the layer material is on average about 30 to 40%, but it is achieved by a special process design that it is about 30 to 60% by volume on the flanks in the web area (5) and in the adjacent upper flank area Wells (V) and on the bottom (B) is much smaller and there is only about 10 to 20 vol%.
  • the original embossed web (S) is increased by approximately twice the layer thickness (DS) than the thickness (D) of the galvanized layer at the bottom (B) of the depressions (V).
  • the practical ratio of the layer thickness (DS) to the thickness (D) is, for example, 10 to 5 ⁇ m.
  • the relatively high hard material particle concentration on the webs (S) is achieved in that the electrolyte with the floating hard material grains (H) is moved at least as quickly tangentially relative to the roll surface over a detent length (R) as the ions in the electrolyte travel a distance medium grain diameter.
  • the relative electrolyte movement can be carried out by circulating the same and / or rotating the roller.
  • a preferred embodiment of the galvanized layer consists of a tough nickel with a silicon carbide insert.
  • the ink absorption volume of the coated surface corresponds at least to the engraved untreated surface, and it is even about 20 times larger than the ink absorption volume of the untreated surface under the specified conditions.
  • REPLACEMENT LEAFS Fig. 4 shows a further embodiment of the surface in cross section.
  • a hard chrome layer (11) which embeds the outermost hard material particles, is galvanically applied to the layer (10) with the hard material deposits.
  • the layer thickness (D1) of the outer hard chrome layer corresponds approximately to the maximum grain size; ie it is about 3 ⁇ m thick. This creates an extremely smooth and wear-resistant surface as being in the Nickelsch outside maybe 'attached hard örner by the chromium layer included.
  • FIG. 5 shows a cross section in high magnification of a coating, which can also be applied to a flat, non-engraved surface, or represents the web area of an engraved surface.
  • the protective layer (10) applied to the carrier material (T) consists of a tough embedding material, namely nickel applied in the basic electroplating bath with hard material grains (H) embedded therein, preferably made of silicon oxide.
  • the layer thickness corresponds to approximately twice to three times the particle diameter, and the volume of hard material is approximately 20 to 50% of the volume.
  • the last introduced hard material grains (H) protrude from the surface of the nickel layer (10) to a part of their diameter.
  • the smooth surface of the ink transfer roller has the further advantage that the squeegees on the printing machines do not wear out as quickly, which in turn improves the service life of the rollers. '-
  • the roller is vertically into the Circulated electroplating bath hung and preferably rotated there slowly.
  • a compressed air bubble is periodically introduced into the bottom area of the bath.

Landscapes

  • Electroplating Methods And Accessories (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rolls And Other Rotary Bodies (AREA)

Abstract

On applique une couche de protection (10) en un métal tenace par déposition galvanique de granulés (H) d'un matériau dur, puis on revêtit galvaniquement cette couche de protection avec une couche (11) en un matériau plus dur dont l'épaisseur (D1) correspond à environ la grandeur des granulés de matériau dur. On utilise un bain de nickel basique avec des granulés (H) en suspension de carbure de silicium et un bain de chrome acide. Le rouleau cannelé en spirales (1) est mis en rotation dans le bain de nickel à une vitesse superficielle telle qu'un écart-modèle (R) entre des cavités (V) de la surface du rouleau cannelé en spirales est parcouru au moins pendant le temps nécessaire pour que les ions du bain de nickel se déplacent d'une grandeur des granulés.
EP19880900362 1987-07-14 1987-12-16 Procede de production de revetements resistants a l'abrasion, notamment de rouleaux canneles en spirales Expired - Lifetime EP0322423B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8709645U DE8709645U1 (de) 1987-07-14 1987-07-14 Farbübertragungswalze mit Schutzschicht
DE8709645U 1987-07-14

Publications (2)

Publication Number Publication Date
EP0322423A1 true EP0322423A1 (fr) 1989-07-05
EP0322423B1 EP0322423B1 (fr) 1991-10-16

Family

ID=6810025

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880900362 Expired - Lifetime EP0322423B1 (fr) 1987-07-14 1987-12-16 Procede de production de revetements resistants a l'abrasion, notamment de rouleaux canneles en spirales

Country Status (4)

Country Link
EP (1) EP0322423B1 (fr)
DE (3) DE8709645U1 (fr)
DK (1) DK167483B1 (fr)
WO (1) WO1989000507A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006005593A1 (de) * 2006-02-07 2007-09-06 Rolltec Gmbh Glättwalze mit Kalander
DE102010042371B3 (de) * 2010-10-13 2011-12-01 Koenig & Bauer Aktiengesellschaft Verfahren zur Beschichtung einer Oberfläche eines Grundkörpers eines Zylinders einer Druckmaschine
CN114891951A (zh) * 2022-06-08 2022-08-12 南京宁宣机械制造有限公司 一种船用集装箱绑扎杆的加工方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL123689C (fr) * 1962-05-30
US4301730A (en) * 1977-09-29 1981-11-24 Pamarco Incorporated Anilox roll and method of making the same
US4567827A (en) * 1985-02-04 1986-02-04 Rockwell International Corporation Copper and nickel layered ink metering roller

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8900507A1 *

Also Published As

Publication number Publication date
DK167483B1 (da) 1993-11-08
DE8709645U1 (de) 1987-08-27
DK78289A (da) 1989-02-21
EP0322423B1 (fr) 1991-10-16
DK78289D0 (da) 1989-02-21
DE3773941D1 (de) 1991-11-21
DE8717972U1 (de) 1992-02-27
WO1989000507A1 (fr) 1989-01-26

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