EP0732206B1 - Printing press roller with an ink-receptive coating - Google Patents
Printing press roller with an ink-receptive coating Download PDFInfo
- Publication number
- EP0732206B1 EP0732206B1 EP96103727A EP96103727A EP0732206B1 EP 0732206 B1 EP0732206 B1 EP 0732206B1 EP 96103727 A EP96103727 A EP 96103727A EP 96103727 A EP96103727 A EP 96103727A EP 0732206 B1 EP0732206 B1 EP 0732206B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coating
- printing press
- press roller
- roller according
- ink
- 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
Links
- 238000000576 coating method Methods 0.000 title claims description 42
- 239000011248 coating agent Substances 0.000 title claims description 39
- 238000007639 printing Methods 0.000 title claims description 30
- 238000000034 method Methods 0.000 claims description 15
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 8
- 229910052750 molybdenum Inorganic materials 0.000 claims description 8
- 239000011733 molybdenum Substances 0.000 claims description 8
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 7
- 229910052721 tungsten Inorganic materials 0.000 claims description 7
- 239000010937 tungsten Substances 0.000 claims description 7
- 239000000956 alloy Substances 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 238000005240 physical vapour deposition Methods 0.000 claims description 3
- 238000009792 diffusion process Methods 0.000 claims description 2
- 238000005328 electron beam physical vapour deposition Methods 0.000 claims description 2
- 239000002360 explosive Substances 0.000 claims description 2
- 238000005268 plasma chemical vapour deposition Methods 0.000 claims description 2
- 238000007747 plating Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 238000005245 sintering Methods 0.000 claims description 2
- 238000007751 thermal spraying Methods 0.000 claims description 2
- 238000005275 alloying Methods 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000000227 grinding Methods 0.000 claims 1
- 238000000462 isostatic pressing Methods 0.000 claims 1
- 239000007791 liquid phase Substances 0.000 claims 1
- 239000012071 phase Substances 0.000 claims 1
- 238000005498 polishing Methods 0.000 claims 1
- 230000003746 surface roughness Effects 0.000 claims 1
- 239000004959 Rilsan Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000004952 Polyamide Substances 0.000 description 3
- 239000003086 colorant Substances 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 229920002647 polyamide Polymers 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000002480 mineral oil Substances 0.000 description 2
- 235000010446 mineral oil Nutrition 0.000 description 2
- 239000005060 rubber Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000005283 ground state Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000001513 hot isostatic pressing Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000007645 offset printing Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 235000019198 oils Nutrition 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 238000007750 plasma spraying Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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 a printing machine roller with a color-friendly Coating according to the preamble of claim 1.
- the inking unit has the task of making one possible thin, evenly closed ink film towards the printing plate cylinder transfer.
- the ink is transported via a complex roller system.
- the zonal Ink quantity via so-called ink knife, against an inking roller are employed, is regulated, the further ink transport takes place via a so-called ink lifter or directly into the inking unit via an intermediate roller.
- the Inking unit itself consists of several rollers, some of which are still for one Ensure cross-distribution and ultimately have the task of being in direct contact with ink rollers standing on the printing plate, defined with the necessary ink quantity supply.
- the inking units are essentially off Roller combinations, consisting of a rubber roller and a polyamide roller, built up.
- a widely used brand name for the polyamide coatings of these Ramsan is polyamide rollers.
- These Rilsan coatings usually lie due to the manufacturing process in thicknesses of 0.3 mm to 1.0 mm. This material shows Thermal conductivity values in the range from 0.22 to 0.25 W / mK. A very small one Thermal conductivity now leads to internal tempering, for example tempered water, in its effectiveness for those on the roller Color film are very severely restricted.
- the information absolutely necessary for the temperature control system namely the Color film temperature, is due to the strong thermal insulation of the Rilsan layer usually very late and heavily damped transferred to the temperature control medium.
- the means that the control speed and accuracy of the system is strong limited.
- the temperature constancy of the Color films have an even greater importance.
- the color film must be in the Temperature range of 30 ° ⁇ 2 ° C can be kept. This task can be done with rilsan-coated paint rubbers cannot be solved satisfactorily at the moment. Especially in reel machines in which the waterless offset is used be performed only very strongly reduced web speeds are currently possible. The performance of the machines is severely limited.
- the color-friendly coating preferably contains a ultra-hard material made of tungsten carbide and a color-friendly material from one Aluminum-bronze connection.
- the invention has for its object a new printing press roller with color-friendly coating to create, which has a better thermal conductivity than that in the prior art Technology known printing machine rollers.
- This object is achieved in that for a printing press roll with a color-friendly coating of the bale surface of the roller core the color-friendly Coating at least one of the elements molybdenum or tungsten as essential Alloy content of at least 50% and a corresponding alloy content not more than 50% of elements alloyable with molybdenum or tungsten contains and has a thickness of 0.05 mm to 0.25 mm.
- the one with molybdenum and / or Elements which can be alloyed with tungsten can be, for example, iron, chromium or nickel be.
- This coating of the roll surface of the roll core results in the Color film, even under extreme offset conditions (minimal color decrease, large Open spaces), an extraordinarily good color film stability, so that the feared The ink rollers no longer run smoothly.
- 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 making these two elements into comparatively thin layers of only Measurements of 0.05 mm to 0.25 mm, preferably 0.1 mm in thickness, resulted in measurements for thermal conductivity values that are approximately three orders of magnitude higher than those previously used Rilsan coatings with a thickness of 0.3mm. With the Coating according to the invention can one or more rollers of the inking unit a printing press, but experience has shown that it is special advantageous to coat the inking rollers.
- Molybdenum is also a very corrosion-resistant material that used especially in chemical plant construction due to this property becomes. Since the roller cores in printing machines are generally made of structural steels without special corrosion protection, it has been shown that the coating according to the invention at the same time an excellent Represents corrosion protection.
- the single figure shows a highly schematic structure of an inking roller 1, the Roller core 2 according to the invention with a coating 3 of the entire bale surface is occupied.
- the coating 3 according to the invention is preferably 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, especially plasma spraying.
- suitable processes are the PVD processes (Physical Vapor Deposition), incl. Electron beam vapor deposition (EBPVD), the CVD process (Chemical Vapor Deposition), which support plasma CVD processes, the galvanic processes, the diffusion processes from the Gas phase or the pack, the sintering process, the hot isostatic pressing process (Hippen), Explosive plating and all reactive processes in which the invention Coating is created by deposition from two liquid or gas phases.
- a subsequent sealing of the coating according to the invention with a color-friendly synthetic resin has been desired, comparatively high Roughness of the coating has proven to be useful. It is based on, among other things this way avoided that color residues in caverns or other pores of the Coating can be kept.
Landscapes
- Inking, Control Or Cleaning Of Printing Machines (AREA)
Description
Die Erfindung betrifft eine Druckmaschinenwalze mit einer farbfreundlichen
Beschichtung gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a printing machine roller with a color-friendly
Coating according to the preamble of
In verschiedenen Bereichen der Anlagentechnik besteht ein Bedarf an Oberflächen, die leicht mit Ölen, Mineralöl und mineralölgebundenen Stoffen, wie zum Beispiel Offsetfarben benetzbar sein müssen. Darüber hinaus müssen diese Oberflächen sehr gut wasserabweisend sein, da andernfalls mit einem Aufreißen des Farbfilms - das sogenannte Blanklaufen - zu rechnen ist.There is a need for surfaces in various areas of plant engineering, which easily with oils, mineral oil and mineral oil-bound substances, such as Offset colors must be wettable. They also need these surfaces be very water-repellent, otherwise the color film will tear open - that so-called blank running - is to be expected.
In einer Offsetdruckmaschine hat das Farbwerk die Aufgabe, einen möglichst dünnen, gleichmäßig geschlossenen Farbfilm auf den Druckplattenzylinder zu übertragen. Der Farbtransport erfolgt bei modernen Druckmaschinen über ein komplexes Walzensystem. Ausgehend von einem Farbkasten, in dem zonal die Farbmenge über sogenannte Farbmesser, die gegen eine Farbduktorwalze angestellt sind, geregelt wird, erfolgt der weitere Farbtransport über einen sogenannten Farbheber oder direkt über eine Zwischenwalze in das Farbwerk. Das Farbwerk selbst besteht aus mehreren Walzen, die zum Teil noch für eine Querverreibung sorgen und letztlich die Aufgabe haben, die in direktem Kontakt mit der Druckplatte stehenden Farbwalzen, definiert mit der notwendigen Farbmenge zu versorgen. Da den rheologischen Eigenschaften der Farbe für den Druckprozeß eine entscheidende Bedeutung zukommt, sind in modernen Druckmaschinen mehrere Farbwalzen temperiert. Das heißt, es wird versucht, die Farbe in einem für den Offsetprozeß günstigen Temperaturbereich zu belassen. Nur so sind die Farbspaltungsprozesse zwischen zwei Farbwalzen beherrschbar. Diese Farbspaltungsprozesse sind letztlich notwendig, um die gewünschte Aufteilung der angebotenen Farbmenge in weiterzutransportierende Farbe und rückzutransportierende Farbe zu gewährleisten. Dem momentanen Stand der Technik entsprechend, sind die Farbwerke im wesentlichen aus Walzenkombinationen, bestehend aus einer Gummiwalze und einer Polyamidwalze, aufgebaut. Ein weit verbreiteter Markenname für die Polyamidbeschichtungen dieser Polyamidwalzen ist Rilsan. Diese Rilsanbeschichtungen liegen in der Regel herstellungsbedingt in Dicken von 0,3 mm bis 1,0 mm vor. Dieser Werkstoff weist Wärmeleitfähigkeitswerte im Bereich von 0,22 bis 0,25 W/mK auf. Eine sehr geringe Wärmeleitfähigkeit führt nun dazu, daß Innentemperierungen, zum Beispiel durch temperiertes Wasser, in ihrer Wirksamkeit für den auf der Walze befindlichen Farbfilm sehr stark eingeschränkt sind.In an offset printing press, the inking unit has the task of making one possible thin, evenly closed ink film towards the printing plate cylinder transfer. In modern printing machines, the ink is transported via a complex roller system. Starting from a color box in which the zonal Ink quantity via so-called ink knife, against an inking roller are employed, is regulated, the further ink transport takes place via a so-called ink lifter or directly into the inking unit via an intermediate roller. The Inking unit itself consists of several rollers, some of which are still for one Ensure cross-distribution and ultimately have the task of being in direct contact with ink rollers standing on the printing plate, defined with the necessary ink quantity supply. Because of the rheological properties of color for the printing process Of crucial importance are several in modern printing presses Ink rollers tempered. That is, it tries to color in one for the To leave offset process favorable temperature range. That's the only way Ink splitting processes between two ink rollers can be mastered. This Color splitting processes are ultimately necessary to achieve the desired division of the offered amount of paint in color to be transported and to ensure that the color is returned. The current status of In accordance with technology, the inking units are essentially off Roller combinations, consisting of a rubber roller and a polyamide roller, built up. A widely used brand name for the polyamide coatings of these Ramsan is polyamide rollers. These Rilsan coatings usually lie due to the manufacturing process in thicknesses of 0.3 mm to 1.0 mm. This material shows Thermal conductivity values in the range from 0.22 to 0.25 W / mK. A very small one Thermal conductivity now leads to internal tempering, for example tempered water, in its effectiveness for those on the roller Color film are very severely restricted.
Die für das Temperaturregelsystem unbedingt notwendige Information, nämlich die Farbfilmtemperatur, wird also durch die starke Wärmeisolation der Rilsanschicht meist sehr verspätet und stark gedämpft an das Temperiermedium übertragen. Das heißt, die Regelgeschwindigkeit und -genauigkeit des Systems ist somit stark eingeschränkt.The information absolutely necessary for the temperature control system, namely the Color film temperature, is due to the strong thermal insulation of the Rilsan layer usually very late and heavily damped transferred to the temperature control medium. The means that the control speed and accuracy of the system is strong limited.
Als problematisch hat sich in jüngster Vergangenheit diese Tatsache nicht nur bei schnellaufenden Rollenmaschinen erwiesen, sondern insbesondere auch bei wasserlos geführten Offsetmaschinen. Bei schnellaufenden Rollenmaschinen ist aufgrund der hohen Dynamik die Erwärmung des Farbfilms im Farbwerk, ausgelöst durch die Walk- und Reibarbeit der Walzenpaarungen zueinander, extrem hoch, so daß ohne aufwendige Innenkühlung ein stabiler Prozeß bei den hohen Geschwindigkeiten überhaupt nicht denkbar wäre. Trotz dieser konstruktiven Maßnahmen müssen auch die Farben so abgestimmt sein, daß sie, ähnlich einem Motoröl, über einen Viskositätsbereich verfügen, der offsettechnisch brauchbar ist. Werden nun Sonderfarben eingesetzt, die über einen derartigen breiten Viskositätsbereich nicht verfügen, treten in schnellen Rollenmaschinen massive Farbspaltungsprobleme auf, da die rheologischen Eigenschaften nicht mehr offsetgerecht sind. Solche Schwierigkeiten können z.B. sein, Farbrupfen, zu geringe Farbdichte, totale Neigung zum Überemulgieren oder Farbschübe.In the recent past, this fact has not only been problematic high-speed reel machines, but also in particular waterless guided offset machines. For high-speed reel machines due to the high dynamics, the heating of the color film in the inking unit is triggered due to the flexing and rubbing work of the roller pairings to each other, extremely high, so that without complex internal cooling a stable process at high Speeds would be unthinkable. Despite this constructive Measures must also match the colors so that they are similar to one Motor oil, have a viscosity range that can be used in offset technology. Special colors are now used that have such a wide range Viscosity range not available, massive roll machines occur in fast Color splitting problems because the rheological properties no longer are offset. Such difficulties can e.g. be, paint drops, too little Color density, total tendency to over-emulsify or color spurts.
In wasserlos geführten Offsetmaschinen kommt der Temperaturkonstanz des Farbfilms eine noch wesentlich größere Bedeutung zu. Der Farbfilm muß im Temperaturbereich von 30° ± 2° C gehalten werden. Diese Aufgabe kann mit rilsanbeschichteten Farbreibern zur Zeit nicht befriedigend gelöst werden. Insbesondere in Rollenmaschinen, in denen der wasserlos geführte Offset durchgeführt werden soll, sind momentan immer nur sehr stark verringerte Bahngeschwindigkeiten möglich. Die Leistungsfähigkeit der Maschinen ist damit stark eingeschränkt.The temperature constancy of the Color films have an even greater importance. The color film must be in the Temperature range of 30 ° ± 2 ° C can be kept. This task can be done with rilsan-coated paint rubbers cannot be solved satisfactorily at the moment. Especially in reel machines in which the waterless offset is used be performed only very strongly reduced web speeds are currently possible. The performance of the machines is severely limited.
Aus der US 4,986,181 ist eine Druckwalze, insbesondere Farbwalze mit einem Walzenkern und einer farbfreundlichen Beschichtung, die eine verbesserte Dauerhaftigkeit aufweist, bekannt. Die farbfreundliche Beschichtung enthält vorzugsweise ein ultrahartes Material aus Wolframkarbid und ein farbfreundliches Material aus einer Aluminium-Bronze-Verbindung.From US 4,986,181 is a printing roller, in particular ink roller with a Roll core and a color-friendly coating that improved Persistence known. The color-friendly coating preferably contains a ultra-hard material made of tungsten carbide and a color-friendly material from one Aluminum-bronze connection.
Der Erfindung liegt die Aufgabe zugrunde, eine neue Druckmaschinenwalze mit farbfreundlicher Beschichtung zu schaffen, die über eine bessere Wärmeleitfähigkeit verfügt, als die im Stand der Technik bekannten Druckmaschinenwalzen.The invention has for its object a new printing press roller with color-friendly coating to create, which has a better thermal conductivity than that in the prior art Technology known printing machine rollers.
Diese Aufgabe wird dadurch gelöst, daß für eine Druckmaschinenwalze mit einer farbfreundlichen Beschichtung der Ballenfläche des Walzenkernes die farbfreundliche Beschichtung zumindest eines der Elemente Molybdän oder Wolfram als wesentlichen Legierungsanteil von mindestens 50 % und einen entsprechenden Legierungsanteil von höchstens 50 % von mit Molybdän oder Wolfram legierungsfähigen Elementen enthält und eine Dicke von 0,05 mm bis 0,25 mm aufweist. Die mit Molybdän und /oder Wolfram legierungsfähigen Elemente können beispielsweise Eisen, Chrom oder Nickel sein. Durch diese Beschichtung der Ballenfläche des Walzenkerns ergibt sich für den Farbfilm, selbst bei extremen Offsetbedingungen (geringste Farbabnahme, große Freiflächen), eine außerordentlich gute Farbfilmstabilität, so daß das gefürchtete Blanklaufen der Farbwalzen nicht mehr auftritt.This object is achieved in that for a printing press roll with a color-friendly coating of the bale surface of the roller core the color-friendly Coating at least one of the elements molybdenum or tungsten as essential Alloy content of at least 50% and a corresponding alloy content not more than 50% of elements alloyable with molybdenum or tungsten contains and has a thickness of 0.05 mm to 0.25 mm. The one with molybdenum and / or Elements which can be alloyed with tungsten can be, for example, iron, chromium or nickel be. This coating of the roll surface of the roll core results in the Color film, even under extreme offset conditions (minimal color decrease, large Open spaces), an extraordinarily good color film stability, so that the feared The ink rollers no longer run smoothly.
Molybdän ist gekennzeichnet durch einen Wärmeleitfähigkeitswert im Bereich von 140 W/mK. Wolfram liegt mit rund 150 W/mK noch etwas darüber. In Verbindung mit der Möglichkeit, diese beiden Elemente zu vergleichsweise dünnen Schichten von nur 0,05mm bis 0,25mm, vorzugsweise 0,1 mm Dicke zu verarbeiten, ergaben Messungen zur Wärmeleitfähigkeit Werte, die um ca. drei Zehnerpotenzen über denen der bisher verwendeten Rilsanbeschichtungen mit einer Dicke von 0,3mm lagen. Mit der erfindungsgemäßen Beschichtung können eine oder mehrere Walzen des Farbwerks einer Druckmaschine versehen werden, jedoch ist es erfahrungsgemäß besonders vorteilhaft, die Farbreibwalzen zu beschichten.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 making these two elements into comparatively thin layers of only Measurements of 0.05 mm to 0.25 mm, preferably 0.1 mm in thickness, resulted in measurements for thermal conductivity values that are approximately three orders of magnitude higher than those previously used Rilsan coatings with a thickness of 0.3mm. With the Coating according to the invention can one or more rollers of the inking unit a printing press, but experience has shown that it is special advantageous to coat the inking rollers.
Molybdän ist zusätzlich noch ein sehr korrosionsbeständiger Werkstoff, der insbesondere im chemischen Anlagenbau aufgrund dieser Eigenschaft eingesetzt wird. Da die Walzenkerne in Druckmaschinen im allgemeinen aus Baustählen ohne besonderen Korrosionsschutz bestehen, hat es sich gezeigt, daß die erfindungsgemäße Beschichtung gleichzeitig einen hervorragenden Korrosionsschutz darstellt.Molybdenum is also a very corrosion-resistant material that used especially in chemical plant construction due to this property becomes. Since the roller cores in printing machines are generally made of structural steels without special corrosion protection, it has been shown that the coating according to the invention at the same time an excellent Represents corrosion protection.
Die einzige Figur zeigt stark schematisiert den Aufbau einer Farbwalze 1, deren
Walzenkern 2 erfindungsgemäß mit einer Beschichtung 3 der gesamten Ballenfläche
belegt ist.The single figure shows a highly schematic structure of an
Die erfindungsgemäße Beschichtung 3 ist vorzugsweise im geschliffenen Zustand
mit einer Rauhigkeit von Rz ≈ 8µm einzusetzen. Je nach Anwendungsfall kann es
vorteilhaft sein, diese Rauhigkeit zu verändern. Die erfindungsgemäße Beschichtung
3 läßt sich ohne weiteres bis auf Rauhigkeiten von Rz = 0,3µm polieren und nach
oben hin in jeden praktisch beliebigen Rauhigkeitszustand bringen.The
Die erfindungsgemäße Beschichtung wird vorzugsweise durch thermisches Spritzen, insbesondere Plasmaspritzen, aufgetragen. Weitere für die Herstellung der Beschichtung 3 geeignete Verfahren sind die PVD-Verfahren (Physical Vapor Deposition), incl. Elektronenstrahlbedampfen (EBPVD), die CVD-Verfahren (Chemical Vapor Deposition), die plasmaunterstützen CVD-Verfahren, die galvanischen Verfahren, die Diffusionsverfahren aus der Gasphase oder dem Pack, die Sintervertahren, die Heißisostatpreßverfahren (Hippen), Sprengplattieren und alle Reaktivverfahren, bei denen die erfindungsgemäße Beschichtung durch Abscheiden aus zwei Flüssig- oder Gasphasen entsteht. Eine nachträgliche Versiegelung der erfindungsgemäßen Beschichtung mit einem farbfreundlichen Kunstharz hat sich bei gewünschter, vergleichsweise hoher Rauhigkeit der Beschichtung als zweckmäßig erwiesen. Es wird unter anderem auf diese Art und Weise vermieden, daß Farbreste in Kavernen, bzw. anderen Poren der Beschichtung gehalten werden.The coating according to the invention is preferably applied by thermal spraying, especially plasma spraying. Further for the production of the Coating 3 suitable processes are the PVD processes (Physical Vapor Deposition), incl. Electron beam vapor deposition (EBPVD), the CVD process (Chemical Vapor Deposition), which support plasma CVD processes, the galvanic processes, the diffusion processes from the Gas phase or the pack, the sintering process, the hot isostatic pressing process (Hippen), Explosive plating and all reactive processes in which the invention Coating is created by deposition from two liquid or gas phases. A subsequent sealing of the coating according to the invention with a color-friendly synthetic resin has been desired, comparatively high Roughness of the coating has proven to be useful. It is based on, among other things this way avoided that color residues in caverns or other pores of the Coating can be kept.
Claims (17)
- Printing press roller with an ink-receptive coating (3) of the curved surface of the roller core (2), characterized in that the ink-receptive coating (3) contains at least one of the elements molybdenum or tungsten as essential alloy component of at least 50% and a corresponding alloy component of at most 50% of elements which are capable of alloying with molybdenum or tungsten, and in that the coating (3) has a thickness of 0.05 mm to 0.25 mm.
- Printing press roller according to claim 1, characterized in that the coating (3) consists of 50% molybdenum and 50% tungsten.
- Printing press roller according to one of the preceding claims, characterized in that it is formed as an oscillating ink roller.
- Printing press roller according to one of the preceding claims, characterized by a coating (3) applied by means of thermal spraying.
- Printing press roller according to one of the preceding claims, characterized in that the coating (3) has a surface roughness of about Rz = 8 µm.
- Printing press roller according to one of the preceding claims, characterized in that the coating (3) is a PVD layer.
- Printing press roller according to one of the preceding claims, characterized in that the coating (3) is an EBPVD layer.
- Printing press roller according to one of the preceding claims, characterized in that the coating (3) is a CVD layer.
- Printing press roller according to one of the preceding claims, characterized in that the coating (3) is a plasma CVD layer.
- Printing press roller according to one of the preceding claims, characterized by an electrolytically applied coating (3).
- Printing press roller according to one of the preceding claims, characterized by a coating (3) applied by means of diffusion.
- Printing press roller according to one of the preceding claims, characterized by a coating (3) applied by means of sintering.
- Printing press roller according to one of the preceding claims, characterized by a coating (3) applied by means of high-temperature isostatic pressing.
- Printing press roller according to one of the preceding claims, characterized by a coating (3) applied by means of explosive plating.
- Printing press roller according to one of the preceding claims, characterized by a coating (3) applied by a reactive process, where the coating is produced by means of reactive conversion from either two liquid phases or two gas phases.
- Printing press roller according to one of the preceding claims, characterized in that the surface of the coating (3) is smoothed by grinding and polishing after the coating procedure.
- Printing press roller according to one of the preceding claims, characterized in that the coating is sealed with a pore-sealing, ink-receptive medium.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19509741 | 1995-03-17 | ||
| DE19509741A DE19509741A1 (en) | 1995-03-17 | 1995-03-17 | Printing machine roller, in particular ink roller |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0732206A2 EP0732206A2 (en) | 1996-09-18 |
| EP0732206A3 EP0732206A3 (en) | 1997-08-27 |
| EP0732206B1 true EP0732206B1 (en) | 1999-12-22 |
Family
ID=7756972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96103727A Expired - Lifetime EP0732206B1 (en) | 1995-03-17 | 1996-03-09 | Printing press roller with an ink-receptive coating |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0732206B1 (en) |
| DE (2) | DE19509741A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19653911C2 (en) * | 1996-12-21 | 2003-03-27 | Roland Man Druckmasch | Printing machine roller with a color-friendly coating on the roll surface of the roller core, in particular ink roller |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2343283C2 (en) * | 1973-08-28 | 1983-07-14 | Metallurgik GmbH, 6078 Neu-Isenburg | Application of plasma spraying of oxide ceramic layers as well as adhesive layers on printing rollers and printing plates |
| DD136480A1 (en) * | 1978-05-26 | 1979-07-11 | Herbert Patzelt | ONE OR MULTILAYER COAT FOR BOW-LEADING CYLINDERS |
| DE3316348C2 (en) * | 1983-05-05 | 1985-03-07 | PTG Plasma-Oberflächentechnik GmbH, 7240 Horb | Process for coating a workpiece |
| DE3608286A1 (en) * | 1985-04-03 | 1986-10-09 | Winfried 7758 Meersburg Heinzel | Method for the surface treatment of a printing machine cylinder, a printing machine cylinder and the use thereof |
| SE447362B (en) * | 1985-06-14 | 1986-11-10 | Kanthal Dev Ab | doctor blade |
| JP2635046B2 (en) * | 1987-05-27 | 1997-07-30 | 株式会社 東京機械製作所 | Roller for inking unit of lithographic printing press and method for manufacturing roller for inking unit of lithographic printing press |
-
1995
- 1995-03-17 DE DE19509741A patent/DE19509741A1/en not_active Withdrawn
-
1996
- 1996-03-09 DE DE59603943T patent/DE59603943D1/en not_active Expired - Lifetime
- 1996-03-09 EP EP96103727A patent/EP0732206B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE19509741A1 (en) | 1996-09-19 |
| DE59603943D1 (en) | 2000-01-27 |
| EP0732206A3 (en) | 1997-08-27 |
| EP0732206A2 (en) | 1996-09-18 |
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