EP0520022B2 - Rouleau d'impression a trames comportant une couche superieure a dessin realisee par dep t electrolytique, et un corps de rouleau pour ledit rouleau - Google Patents

Rouleau d'impression a trames comportant une couche superieure a dessin realisee par dep t electrolytique, et un corps de rouleau pour ledit rouleau Download PDF

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Publication number
EP0520022B2
EP0520022B2 EP91906836A EP91906836A EP0520022B2 EP 0520022 B2 EP0520022 B2 EP 0520022B2 EP 91906836 A EP91906836 A EP 91906836A EP 91906836 A EP91906836 A EP 91906836A EP 0520022 B2 EP0520022 B2 EP 0520022B2
Authority
EP
European Patent Office
Prior art keywords
layer
roller
nickel
roller body
metal
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
EP91906836A
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German (de)
English (en)
Other versions
EP0520022B1 (fr
EP0520022A1 (fr
Inventor
Henricus Hermanus Wilhelmus Thuis
Albert Jan Bosch
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.)
Stork Screens BV
Original Assignee
Stork Screens BV
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Application filed by Stork Screens BV filed Critical Stork Screens BV
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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 in the first place to a screen roller at least comprising a cylindrical metal roller body and shaft means, with a pattern of recesses present on the external surface of the roller body.
  • Screen rollers are generally known (e.g. US-A 4,567,827 ; DE-A 33 36 374) and usually comprise a thick-walled or solid metal cylinder in the surface of which a screen pattern is provided by means of suitable methods which can involve, for example, the use of a knurling roller.
  • Such a knurling roller is provided with bulges on the external surface; during the formation of a pattern of recesses for a screen roller the knurling roller is pressed with force against the surface of the rotating roller body, while the knurling roller is simultaneously made to undergo a movement which is parallel to the axis of the rotating roller body.
  • Such known screen rollers are commonly used in methods in which in, for example, a printing process a uniform layer of ink or another coating material has to be applied directly or indirectly by means of an intermediate roller, e.g. of rubber, to a printing roller or to a conveyed web of material.
  • an intermediate roller e.g. of rubber
  • the ink or the medium is transferred to the printing block or the web to be coated.
  • Such known rollers e.g. DE-A 33 36 374
  • Such known rollers which on account of their manufacture in the pattern-bearing part are often made of copper or have a functional surface layer of copper, have the disadvantage that, as a result of the relatively low hardness of the copper, their shook resistance leaves something to be desired.
  • a wear-resistant layer covering the pattern-bearing copper layer is generally present on the surface, the softness of the underlying copper material will be such that in the event of impacts deformation of the surface readily occurs. A deformation of the surface affects the evenness of the coating layer to be applied to a printing block or web, and is therefore a rejection criterion for the screen roller.
  • the screen roller according to the invention as described above is characterized as indicated in the characterizing part of claim 1.
  • this Cu will be of a hardness which is generally less than 200 HV.
  • the metal of the roller body is generally selected from copper, steel and aluminium.
  • the metal selected for the electroplated layer having a greater hardness than the above-mentioned metals for the roller body due to mechanical deformation is nickel, alloyed nickel or doped nickel. Assuming a copper roller body, this body will generally be of a hardness which is equal to a maximum of 200 HV.
  • a plated layer of nickel is, for example, of a hardness of 200 to 650 HV and when used in the roller body according to the invention will show good results; an electroplating with a hardness of min. 250 HV is preferably used.
  • Suitable nickel alloys which can be mentioned are, for example, nickel/cobalt and nickel/ beryllium with hardnesses up to 400 HV.
  • a screen roller according to the invention will therefore have a roller body with a hardness up to 200 HV, an electroplated Ni-based layer being connected to the roller body and this electroplated layer being of a hardness of at least 250 HV.
  • Doped nickel is understood to mean a nickel deposition in which non-metallic substances such as inorganic metalloids and organic products or decomposition products thereof are incorporated. Of the metalloids, phosphorus can be mentioned in particular, while a nickel layer which is formed in a bath with organic brighteners, such as disodium benzene-m-disulphonic acid, hydroxypropionitrile or butynediol, contains organic material.
  • the electroplated layer on the metal roller body is advantageously nickel which is doped with 4 to 12 wt.-% phosphorus.
  • Such coats doped with phosphorus can have a hardness of 300 to 700 HV depending on the degree of incorporation in the nickel lattice and the type of additive, which gives the screen roller according to the invention exceptionally good properties.
  • the thickness of the electroplated layer will depend on the depth of the recesses to be made in this layer; in general, the thickness can lie between 0.1 and 2.5 mm.
  • the electroplated layer will be of a thickness in the range between 0.5 and 1.5 mm.
  • the point of departure is an electroplated layer in which a pattern of recesses is present and which is connected to the roller body.
  • the electroplated layer can in the first place be formed separately and then connected to the roller body.
  • connection to the roller body can be carried out in several ways:
  • the metal sleeve can, however, also be deposited in an electrodeposition process directly onto the roller body and connected in that way.
  • the pattern of recesses can be produced prior to or following the connection of the metal layer to the roller body.
  • the initial hardness increases as a result of mechanical deformation of the specific functional layer, in this case nickel with a special doping; this contrasts with the situation in which the functional layer is of copper.
  • a hardness change from, for example, originally 180-300 HV to 300-400 HV (100 p) is found.
  • Deformation can occur, for example, with the use of a knurling roller for the formation of a pattern of recesses.
  • this can be either a single layer or a layer consisting of several component layers. In the case of a layer made up of several component layers all component layers can have the same composition and thickness.
  • the compositions can also be different, and contain one or more of the above-mentioned compositions, while the thicknesses of the component layers can also differ.
  • the roller body can be made of e.g. steel or copper.
  • the doped electroplated nickel layer in that case is of such favourable hardness compared with the base material that the final screen roller has greater shock resistance than was considered achievable before.
  • the electroplated layer containing the pattern of recesses of the screen roller is for this purpose preferably coated with a thin layer of wear-resistant and/or corrosion-resistant material selected from materials such as: e.g. hard chromium, hard nickel, titanium nitride, titanium carbide, boron nitride, chromium nitride and tungsten carbide, or combinations thereof.
  • the material of the wear-resistant and/or corrosion-resistant material layer is not restricted to the materials mentioned above; other materials, such as organic layers, for example polytetrafluoroethylene or ceramic layers, cermet, dispersion-hardened layers, can also be applied.
  • the thin protective top layer of wear-resistant and/or corrosion-resistant material is in general of a thickness between 1 and 50 micrometers; in particular, this thin layer is of a thickness of between 3 and 15 micrometers.
  • the invention also relates to a roller body of metal for a screen roller, in which the roller body can be provided on its external surface with recesses which are arranged in a regular manner in a pattern, and in which said roller body according to the invention is characterized in that an electroplated metal layer with properties such as those described for the screen roller according to the invention is connected thereto.
  • Figure 1 shows diagrammatically a screen roller in which the roller is indicated by reference number 1 and the roller body bears the number 2.
  • the shaft means are indicated by 3, and a part of the roller surface in which the recesses are arranged in a pattern is indicated by 4.
  • the roller body 2 can be a solid roller body; the roller body can also be a thick-walled roller body in which the shaft means are fixed by means of discs inside the periphery of the thick-walled roller body.
  • Figure 2 shows a part of the wall of a thick-walled roller body with an electroplated layer connected thereto, the recesses being provided in the electroplated layer.
  • the wall of the roller body is indicated by number 20; the electroplated layer bears the number 21, and the recesses formed in the electroplated layer are indicated by the number 22.
  • the walls between the different recesses 22 are indicated by 23.
  • the electroplated layer 21 is deposited directly onto the roller body 20 using an electroplating process which is known per se.
  • the metal of the metal layer 21 is, for example, doped nickel.
  • FIG 3 shows a part of the electroplated layer of Figure 2 on an enlarged scale.
  • the electroplated metal for example nickel with organic doping, is indicated by 30. It is indicated by 31 that after formation of the pattern of recesses a wear-resistant and/or corrosion-resistant layer such as, for example, a hard chromium layer is applied.
  • the selection can be made from various application techniques.
  • hard chromium or hard nickel layers can also be applied by electroplating.
  • the metal nitride or metal carbide layers also mentioned can be formed using, for example, cathodic sputtering processes starting from the compound itself or using reactive cathodic sputtering processes in which the metal concerned is sputtered in a gas atmosphere which is suitable for supplying the elements which are necessary for the formation of the appropriate metal nitride or metal carbide compound.
  • the roller in the above-mentioned publication comprises a roller body around which a thin perforated sleeve which remains detachable from the roller body is pushed.
  • the perforations in the sleeve extend over the whole thickness of the sleeve and am of a shape which depends on the method of manufacture of the sleeve.
  • the present invention relates to a screen roller which has a closed electroplated layer which is connected to the roller body and is provided with recesses.
  • the shape of the recesses and the pattern of arrangement can be determined freely by selection of the production method.
  • the screen roller according to the invention can have its electroplated layer removed from it in the event of wear after long use and can be provided again with a new metal layer.
  • the screen roller according to the invention is therefore renewable.

Landscapes

  • Rolls And Other Rotary Bodies (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Printing Plates And Materials Therefor (AREA)

Abstract

On décrit un rouleau à trames (1) composé d'au moins un corps de rouleau en métal (20) et un dessin (4) sous forme d'alvéoles dans sa surface extérieure. Le dessin formé par les alvéoles (22) est réalisé dans une couche réalisée par dépôt électrolytique sur la surface extérieure du corps du rouleau. La couche métallique (21) est caractérisée par une dureté supérieure à celle du métal du corps du rouleau (20). La dureté du métal du corps du rouleau (20) peut aller avantageusement jusqu'à 200 HV, et la dureté du métal de la couche métallique extérieure (21) jusqu'à 250 HV. Le métal de la couche métallique est avantageusement choisi parmis le nickel, le nickel allié, et le nickel dopé. Un corps de rouleau destiné à être utilisé dans un rouleau pour l'impression à trames selon l'invention est également décrit.

Claims (13)

  1. Rouleau tramé (1) comprenant au moins un corps métallique cylindrique de rouleau et un moyen formant arbre (3), un motif (4) en creux étant présent sur la surface extérieure du corps de rouleau, caractérisé en ce que le motif (4) constitué par des creux (22) se trouve dans une couche métallique (21) formée par dépôt électrolytique, reliée au corps (20) de rouleau et dont la dureté, par rapport à la dureté initiale, est accrue par suite de déformations mécaniques de ladite couche métallique (21), rouleau dans lequel le métal de la couche formée par dépôt électrolytique est choisi parmi le nickel, des alliages de nickel et le nickel dopé.
  2. Rouleau tramé selon la revendication 1, comprenant un corps métallique cylindrique (20) de rouleau ayant une dureté Vickers maximale 200, caractérisé en ce que la couche (21) formée par dépôt électrolytique a une dureté Vickers minimale 250.
  3. Rouleau trame selon la revendication 1, caractérisé en ce qu'une couche de nickel (21) formée par dépôt électrolytique est présente sur le corps métallique (20) de rouleau, laquelle couche est dopée avec un ou plusieurs additifs organiques ou inorganiques ou produits de décomposition de ceux-ci.
  4. Rouleau tramé selon la revendication 3, caractérisé en ce que le nickel est dopé avec un ou plusieurs additifs ou produits de décomposition de ceux-ci qui ont des propriétés de brillanteurs de première et/ou de seconde classe.
  5. Rouleau trame selon la revendication 4, caractérisé en ce que le nickel est dopé avec un additif choisi parmi le sel de sodium d'acide benzène-m-disulphonique, le butynédiol et l'hydroxypropionitrile.
  6. Rouleau tramé selon la revendication 1, caractérisé en ce qu'une couche de nickel (21) formée par dépôt électrolytique et dopée avec du phosphore (P) est présente sur le corps métallique (20) de rouleau.
  7. Rouleau tramé selon la revendication 6, caractérisé en ce que le nickel est dopé avec 4 à 12% de P en poids.
  8. Rouleau tramé selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que la couche (21) formée par dépôt électrolytique a une épaisseur de 0,1 à 2,5 mm.
  9. Rouleau tramé selon la revendication 6, caractérisé en ce que la couche (21) formée par dépôt électrolytique a une épaisseur de 0,5 à 1,5 mm.
  10. Rouleau tramé selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que la couche (30) formée par dépôt électrolytique et contenant le motif en creux est revêtue par une couche mince (31) de matière résistant à l'usure et/ou résistant à la corrosion, choisie parmi des matières telles que le chrome dur, le nickel dur, le nitrure de titane, le carbure de titane, le nitrure de bore, le nitrure de chrome et le carbure de tungstène.
  11. Rouleau tramé selon la revendication 10, caractérisé en ce que la couche mince (31) de matière résistant à l'usure et/ou résistant à la corrosion a une épaisseur de 5 à 50 micromètres.
  12. Rouleau tramé selon la revendication 11, caractérisé en ce que la couche mince (31) a une épaisseur de 10 à 15 micromètres.
  13. Corps métallique (2) de rouleau pour rouleau tramé (1), dans lequel le corps (2) de rouleau peut être pourvu, sur sa surface extérieure, de creux (5) disposés d'une manière régulière selon un motif (4), caractérisé en ce qu'une couche (21) formée par dépôt électrolytique et ayant des propriétés telles que celles indiquées dans l'une ou plusieurs des revendications 1 à 12 est reliée au corps (20) de rouleau.
EP91906836A 1990-03-15 1991-03-14 Rouleau d'impression a trames comportant une couche superieure a dessin realisee par dep t electrolytique, et un corps de rouleau pour ledit rouleau Expired - Lifetime EP0520022B2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL9000596A NL9000596A (nl) 1990-03-15 1990-03-15 Rasterwals met een patroonlaag in een galvanische toplaag en walslichaam voor een dergelijke wals.
NL9000596 1990-03-15
PCT/NL1991/000039 WO1991013762A1 (fr) 1990-03-15 1991-03-14 Rouleau d'impression a trames comportant une couche superieure a dessin realisee par depôt electrolytique, et un corps de rouleau pour ledit rouleau

Publications (3)

Publication Number Publication Date
EP0520022A1 EP0520022A1 (fr) 1992-12-30
EP0520022B1 EP0520022B1 (fr) 1993-09-22
EP0520022B2 true EP0520022B2 (fr) 1996-06-19

Family

ID=19856747

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91906836A Expired - Lifetime EP0520022B2 (fr) 1990-03-15 1991-03-14 Rouleau d'impression a trames comportant une couche superieure a dessin realisee par dep t electrolytique, et un corps de rouleau pour ledit rouleau

Country Status (5)

Country Link
EP (1) EP0520022B2 (fr)
AU (1) AU7577191A (fr)
DE (1) DE69100405T2 (fr)
NL (1) NL9000596A (fr)
WO (1) WO1991013762A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007038188A1 (de) * 2007-08-13 2009-02-19 Federal-Mogul Burscheid Gmbh Verschleißfest beschichtetes Maschinenelement und Verfahren zu dessen Herstellung

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9101971A (nl) * 1991-11-25 1993-06-16 Stork Screens Bv Metalen plaat ter vervaardiging van een diepdrukhuls en werkwijze ter vervaardiging daarvan.
NL9202259A (nl) * 1992-12-24 1994-07-18 Stork Screens Bv Slijtbestendig zeefprodukt en werkwijze voor de vervaardiging daarvan.
DE10002637B4 (de) * 2000-01-21 2010-12-30 A.+ E. Ungricht Gmbh & Co. Kg Walze
DE102006005593A1 (de) * 2006-02-07 2007-09-06 Rolltec Gmbh Glättwalze mit Kalander
WO2011072404A1 (fr) * 2009-12-18 2011-06-23 Terolab Surface Group S.A. Procédé de fabrication d'un rouleau doseur convenant particulièrement à l'impression et rouleau doseur obtenu au moyen de ce procédé

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3336374C2 (de) * 1983-10-06 1986-12-18 Kurt Zecher GmbH, 4790 Paderborn Verfahren zur Herstellung der Oberfläche einer Farbübertragungswalze
US4567827A (en) * 1985-02-04 1986-02-04 Rockwell International Corporation Copper and nickel layered ink metering roller

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007038188A1 (de) * 2007-08-13 2009-02-19 Federal-Mogul Burscheid Gmbh Verschleißfest beschichtetes Maschinenelement und Verfahren zu dessen Herstellung
DE102007038188B4 (de) * 2007-08-13 2018-11-15 Federal-Mogul Burscheid Gmbh Verschleißfest beschichteter Kolbenring und Verfahren zu dessen Herstellung

Also Published As

Publication number Publication date
WO1991013762A1 (fr) 1991-09-19
EP0520022B1 (fr) 1993-09-22
AU7577191A (en) 1991-10-10
NL9000596A (nl) 1991-10-01
EP0520022A1 (fr) 1992-12-30
DE69100405T2 (de) 1994-05-11
DE69100405D1 (de) 1993-10-28

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