EP0322423B1 - 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 Download PDF

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Publication number
EP0322423B1
EP0322423B1 EP19880900362 EP88900362A EP0322423B1 EP 0322423 B1 EP0322423 B1 EP 0322423B1 EP 19880900362 EP19880900362 EP 19880900362 EP 88900362 A EP88900362 A EP 88900362A EP 0322423 B1 EP0322423 B1 EP 0322423B1
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EP
European Patent Office
Prior art keywords
fact
per
layer
protective layer
ink roller
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
Application number
EP19880900362
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German (de)
English (en)
Other versions
EP0322423A1 (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
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Kurt Zecher GmbH
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Publication date
Application filed by Kurt Zecher GmbH filed Critical Kurt Zecher GmbH
Publication of EP0322423A1 publication Critical patent/EP0322423A1/fr
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Anticipated expiration legal-status Critical
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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
    • 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 may have been carried out, and a hard chrome layer has been galvanically applied to 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, whose 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 method 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, especially in paste form, or if chemically aggressive wear materials are present.
  • a nickel layer provided with hard material deposits is very tough and impact-resistant and much more wear-resistant in ink roller operation than 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 are released little by little after their complete release get lost.
  • This abrasive and chemical wear of the nickel is largely eliminated in an advantageous further development of the coating by a thin hard chrome plating, the layer thickness of which corresponds approximately to the grain size of the hard material particles, so that a further multiplication of the wear resistance can be achieved.
  • 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 a chrome layer is electroplated, 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 plating bath, with a constant concentration of the hard material particles to be kept in suspension. will be 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. A correspondingly uniformly distributed incorporation of the particles into the galvanized layer, particularly when viewed as a whole with an ink transfer roller, is achieved, so that the coloring is completely uniform.
  • Silicon carbide can be used as the hard material, but silicon nitride, silicon oxide, corundum, worframe carbide, diamond dust etc. can also be used.
  • 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 knurls or preferably by embossing with depressions (V), which preferably have 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 grain storage on the plastic base (1) with the depressions (V).
  • the applied layer (10) has a thickness (D) of approximately 10 ⁇ m, which corresponds approximately to 1 to 2 times the web width (SB) and is a multiple of the maximum grain size (K) of the hard material grains (H), which is approximately 1 is up to 3 ⁇ m.
  • 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 about twice the layer thickness (DS) than the thickness (D) of the galvanized layer at the bottom (B) of the depressions (V) is -
  • the practical ratios of the layer thickness (DS) to Thickness (D) is e.g. B. 10 to 5 microns.
  • 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 tangentially relative to the roller surface over a grid length (R) at least as fast as the ions in the electrolyte travel a distance medium hard 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% larger than the ink absorption volume of the untreated surface under the specified conditions.
  • 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 inclusions.
  • the layer thickness (D1) of the outer hard chrome layer corresponds approximately to the maximum grain size; i.e. it is about 3 ⁇ m thick. This creates an extremely smooth and abrasion-resistant surface, since the hard material cores deposited on the outside in the nickel layer are enclosed by the chrome layer.
  • 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% by volume of the layer.
  • the last introduced hard material grains (H) protrude from the surface of the nickel layer (10) to a part of their diameter.
  • the protective layer (10) which offers abrasion resistance and impact resistance, but has a roughness due to the outstanding hard material grains (H), is advantageously smoothed by a hard chrome layer (11) and protected against chemical and fine-grained abrasive wear. It can be seen that the chromium in the acid bath has no hole formation around the hard material particles (H) and does not form any needles or elevations over the particles.
  • the smooth surface of the ink transfer roller has the further advantage that the squeegees do not wear out so quickly on the printing presses, which in turn improves the service life of the rollers.
  • the roller Seen overall to achieve a uniform distribution of the hard material particles (H) over the surface of an ink transfer roller and to achieve a relatively increased concentration of the hard material particles (H) on the web areas compared to the flanks and bottom areas of the depressions, the roller is hung vertically in the constantly circulating electroplating bath and there preferably rotated slowly.
  • a stream of compressed air bubbles is periodically introduced into the floor 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.

Claims (16)

1. Rouleau cannelé en spirales, dans la chemise (1) duquel des cavités (V) ont été pratiquées, et lequel est revêtu, par galvanisation, d'une couche protectrice (10) en matière résistante à l'abrasion, caractérisé par le fait que la couche protectrice (10) consiste en métal tenace, dans lequel des grains de matière dure (H), d'une granulométrie d'environ 1 à 3 µm, sont logés, et que la couche protectrice présente une épaisseur allant approximativement de la taille d'un grain jusqu'au triple de celle-ci.
2. Rouleau cannelés en spirales selon revendication 1, caractérisé par le fait que le volume des grains de matière dure (H) représente 30 à 60% du volume de la couche d'incorporation dans la zone des ponts (S) séparant les cavités (V), et 10 à 30% dans la zone des flancs et du fond des cavités (V).
3. Rouleau cannelé en spirales selon revendication 1 ou 2, caractérisé par le fait que la couche protectrice (10) présente, dans la zone des ponts (S), une épaisseur (DS) allant de la largeur (SB) d'un pont (S) au double de celle-ci, tandis que, sur les fonds (B), son épaisseur (D) est approximativement égale à la moitié de l'épaisseur de couche (DS).
4. Rouleau cannelé en spirales selon l'une des revendications précédentes, caractérisé par le fait que les grains de matière dure (H) consistent en carbure de silicium et que la matière d'incorporation consiste en nickel.
5. Rouleau cannelé en spirales selon l'une des revendications 1 à 4, caractérisé par le fait que l'épaisseur de couche (DS) est de 10 µm.
6. Rouleau cannelé en spirales selon l'une des revendications précédentes, caractérisé par le fait que la couche protectrice (10) en matière métallique tenace, contenant les inclusions de matière dure (H) est une première couche protectrice, sur laquelle une autre couche (11), consistant en matière plus résistante à l'abrasion que la première couche (10) et dont l'épaisseur (D) correspond à peu près à la granulométrie des grains de matière dure (H) est appliqué par galvanisation.
7. Rouleau cannelé en spirales selon revendication 6, caractérisé par le fait que la seconde couche (11) consiste en chrome dur.
8. Rouleau cannelé en spirales selon revendication 7, caractérisé par le fait que l'épaisseur de couche (D1) de la couche de chrome dur est de 1,5 à 3 µm.
9. Rouleau cannelé en spirales selon l'une des revendications précédentes, caractérisé par le fait que les grains en matière dure (H) sont en oxyde de silicium, en nitrure de silicium, en corindon ou en carbure de tungstène, diamant ou en mélanges de ceux-ci.
10. Procédé de fabrication d'un revêtement résistant à l'abrasion, par application par galvanisation d'une première couche protectrice (10) en métal tenace provenant d'un électrolyte, des particules de matière dure (H), maintenues en suspension dans l'électrolyte, étant incorporées dans la couche protectrice (10) d'une épaisseur allant, approximativement, de la granulométrie d'une particule de matière dure (H) au triple de celle-ci, caractérisé par le fait qu'une autre couche (11) métallique plus plus dure que le métal de la première couche (10), est appliquée par galvanisation, sur la première couche (10), l'épaisseur (D1) de cette autre couche correspondant à peu près à la moitié de la taille d'un grain de matière dure (H).
11. Procédé selon revendication 10, caractérisé par le fait que le métal tenace provient d'un bain basique au nickel et que les particules de matière dure (H), consistant en carbure de silicium et présentant une taille de 1 à 3 µm, sont maintenues en suspension dans le bain au nickel par circulation dans une concentration telle que leur volume représente environ 30 à 40% du volume de la couche protectrice et que la matière métallique de la seconde couche (11) est un chrome dure provenant d'un bain acide au chrome.
12. Procédé selon revendication 11, caractérisé par le fait que, pour le revêtement d'un rouleau cannelé en spirales (1), dans la surface duquel des cavités (V) sont pratiquées à intervalles répondant à une trame (R), le bain au nickel est agité, transversalement par rapport à la surface, à une vitesse telle qu'il couvre au moins un intervalle de trame au cours du temps nécessaire aux ions pour se mouvoir vers la surface, par le courant galvanique, sur un parcours correspondant au diamètre d'un grain.
13. Procédé selon revendication 12, caractérisé par le fait que la vitesse du bain au nickel, par rapport à la surface du rouleau, est obtenue par la circulation du bain au nickel et/ou par un mouvement imprimé au rouleau cannelé en spirales (1) dans le bain au nickel.
14. Procédé selon revendication 13, caractérisé par le fait que le rouleau cannelé en spirales (1) est mis dans le bain au nickel, son axe étant orienté verticalement, et tourne alors autour de son axe.
15. Procédé selon l'une des revendications 12 à 14, caractérisé par le fait que le rouleau cannelée en spirales (1) est tourné dans le bain au nickel à une vitesse de 120 mm/sec. et maintenu à une température d'environ 55°C, et que la densité du courant galvanique utilisé est de 2 A/dm² de la surface projetée, et que le bain au nickel est, de préférence, traversé périodiquement par un courant de bulles d'air.
16. Procédé selon l'une des revendications 12 à 15, caractérisé par le fait que le rouleau cannelés en spirales (1) est tourné dans le bain au chrome à une vitesse de 120 mm/sec. et maintenu à une température de 55°C, et que la densité du courant galvanique utilisé est 35 A/dm².
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 EP0322423A1 (fr) 1989-07-05
EP0322423B1 true EP0322423B1 (fr) 1991-10-16

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ID=6810025

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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

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010042371B3 (de) * 2010-10-13 2011-12-01 Koenig & Bauer Aktiengesellschaft Verfahren zur Beschichtung einer Oberfläche eines Grundkörpers eines Zylinders einer Druckmaschine

Families Citing this family (2)

* 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
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010042371B3 (de) * 2010-10-13 2011-12-01 Koenig & Bauer Aktiengesellschaft Verfahren zur Beschichtung einer Oberfläche eines Grundkörpers eines Zylinders einer Druckmaschine

Also Published As

Publication number Publication date
DK167483B1 (da) 1993-11-08
EP0322423A1 (fr) 1989-07-05
DE8709645U1 (de) 1987-08-27
DK78289A (da) 1989-02-21
DK78289D0 (da) 1989-02-21
DE3773941D1 (de) 1991-11-21
DE8717972U1 (de) 1992-02-27
WO1989000507A1 (fr) 1989-01-26

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