EP0974460B1 - Procédé et dispositif pour réguler le transfert de l'encre dans un appareil d'encrage - Google Patents

Procédé et dispositif pour réguler le transfert de l'encre dans un appareil d'encrage Download PDF

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Publication number
EP0974460B1
EP0974460B1 EP19980111516 EP98111516A EP0974460B1 EP 0974460 B1 EP0974460 B1 EP 0974460B1 EP 19980111516 EP19980111516 EP 19980111516 EP 98111516 A EP98111516 A EP 98111516A EP 0974460 B1 EP0974460 B1 EP 0974460B1
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EP
European Patent Office
Prior art keywords
roller
rollers
inking unit
transfer
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
Application number
EP19980111516
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German (de)
English (en)
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EP0974460A1 (fr
Inventor
Helmut Dr.-Ing. Brötz
Christoph Dr.-Ing. Hars
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.)
FGD Forschungsgesellschaft Druckmaschinen eV
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FGD Forschungsgesellschaft Druckmaschinen eV
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.)
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Publication date
Application filed by FGD Forschungsgesellschaft Druckmaschinen eV filed Critical FGD Forschungsgesellschaft Druckmaschinen eV
Priority to EP19980111516 priority Critical patent/EP0974460B1/fr
Priority to DE59800196T priority patent/DE59800196D1/de
Publication of EP0974460A1 publication Critical patent/EP0974460A1/fr
Application granted granted Critical
Publication of EP0974460B1 publication Critical patent/EP0974460B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices

Definitions

  • the invention relates to methods according to the preambles of claims 1 or 5 and associated devices according to the preambles of claims 6 or 14.
  • the printing ink is usually by means of a so-called Ductor roller or ink fountain roller from an ink fountain of dosing agents influenced and removed from the next inking unit roller in a first ink layer made available.
  • This is usually a squeegee roller covering the ink layer intermittently decreases from the duct roller and into one of the inking rollers introduces formed inking unit roller train.
  • the inking unit roller train can here in the direction of the transport path of the printing ink to one to be inked Printing plate divided into two or more parallel inking unit roller strands his.
  • At the end of each inking roller train are one or more so-called inking inking rollers arranged which a printing plate or Ink the printing form directly.
  • the thickness of the paint layer takes on individual inking unit rollers starting from the first inking unit roller in the direction up to the ink application inking rollers, due to the continuous ink splitting between two rolling inking rollers that roll on each other.
  • ink rollers In so-called sheetfed offset printing, four inking rollers are usually used and only two are often used in web offset printing Ink roller is used.
  • the inking rollers are correspondingly in Inking roller strands divided.
  • the decrease in the ink layer thickness within the inking unit depends on that stripes in a line, which are called color zones, for example, subject-related ink requirements for coloring the printing plate or Printing form.
  • the main task of an inking system is to create negative color reliefs that follow a different delivery of ink from ink to the Printing plate or printing form on the ink application arise, if possible, by re-inking the inking unit rollers completely equalize before the next contact the Ink rollers are applied to the printing plate or printing form.
  • the inking unit roller inking unit depends on the subject and a printing unit simultaneously for the processing of a wide variety of subjects must be suitable, it is in particular desirable in inking units of offset printing units, influence on the To be able to take color distribution in the inking unit.
  • inking rollers in waterless offset are either by means of cold blown air from the outside or an internal temperature control of individual inking rollers cooled via a cooling water circuit.
  • Devices of this type are for example from DE 4335097 A1, DE 9316932 U1 and DE 4202544 A1 are known.
  • Temperature control devices affect the viscosity of the transported printing ink.
  • temperature control devices at almost all locations of printing units and Color works become known.
  • inking rollers In addition to systems for applying tempered Blown air on printing unit cylinders, e.g. a forme cylinder or one Transfer cylinders, such systems for inking rollers are shown.
  • the Tempering can be done from the outside with the help of blowing air systems or also by means of heat-carrying media flowing through the inking unit rollers from the inside be made possible.
  • Temperature sensors are often used to record the Surface temperature of inking rollers or cylinders used to the Control the temperature of the temperature control medium accordingly.
  • the location too Within an inking unit from the ductor roller to the friction inking unit rollers Control the temperature of the temperature control medium accordingly.
  • the location too within an inking unit is from the doctor roller to friction inking unit rollers described for inking inking rollers.
  • the function the temperature control devices for cooling and stabilizing the ink transport described In DE 4335097 A1, the reduction of the Contamination in a printing unit and the associated inking unit described. It is not known how the ink transport in with the described devices an inking unit can be influenced.
  • DE-OS 1 953 590 describes a method for influencing a lithographic printing process and a printing machine for performing known of the procedure.
  • the process is characterized in that at the same time the temperature of the humidifier and / or the printing form and the Temperature of the printing ink is controlled or regulated.
  • the temperature should the printing ink can be controlled at at least one point in the inking unit. This can preferably be connected to the application rollers Distribution rollers happen.
  • the direction of rotation of the Printing cylinder first applied printing ink a higher temperature have than the printing ink applied below.
  • the distributor rollers are each the Application rollers assigned to the inking unit.
  • inking and dampening unit for described a rotary offset printing machine.
  • vibration devices assigned to a roller, for example.
  • the vibration devices should each be assigned to an ink roller.
  • the ink drums are the Application rollers assigned to the inking unit.
  • a device for controlling the color layer thickness in known a printing press has a heating device, by means of which the temperature of an ink layer in an inking unit can be influenced.
  • the ink layer thickness should thus regulate the ink temperature and controlling the viscosity of the ink. In particular, should constant production by keeping the ink temperature constant regardless of the ambient temperature.
  • the aim of the invention is therefore to use the known means in a simple manner To be able to influence the ink transport within an inking unit.
  • the object of the invention is a device according to the preamble of Develop claim 1 so that while avoiding the disadvantages of State of the art the distribution of the ink transport in an inking unit can be controlled as required.
  • Hard inking rollers preferably have a metal surface that has better thermal conductivity than the Inking roller cover of the soft inking rollers, which usually consists of a thicker viscoelastic cover and is a poor heat conductor.
  • the Inking roller cover of the soft inking rollers which usually consists of a thicker viscoelastic cover and is a poor heat conductor.
  • a soft inking roller is provided.
  • the inking unit rollers which are in the Branch point of the inking unit roller strands arranged inking unit roller are assigned a device for roughening the color layer surface assigned.
  • This is preferably an inking roller with a profiled surface.
  • These inking rollers can optionally be connected to the corresponding inking rollers be employed.
  • the offset printing unit contains an inking unit, a forme cylinder 18 and a transfer cylinder 19.
  • the inking unit has an ink fountain 1, a duct roller 2 and one Lifter roller 3.
  • the lifter roller 3 is provided with a visco-elastic cover and oscillating alternately with the help of a drive, not shown is turned against the duct roller 2 and a first transfer roller 4.
  • the first transfer roller 4 is usually in practice as a distribution roller executed.
  • the inking unit also has several stationary positions Transfer rollers 5, 11 and 15. These are marked with a small circle Clarification of the fixed storage and its surface marked as soft.
  • a number of distribution rollers 6, 10, 12, 14 and 16 are also provided.
  • the Distributing rollers 6, 10, 12, 14, 16 become rotating and adjustable axially oscillating driven. These are marked with a small circle and a cross Clarification of the radial fixed bearing, the axially movable bearing and their surface characteristics marked as hard.
  • the distribution rollers 10 and 12 and the transfer roller 11 form a first Roll strand 8. Furthermore, the distribution rollers 14 and 16 and the Transfer rollers 15 a second roll strand 9.
  • the transfer roller 5 is a so-called rider roller 26 and the Distributing roller 6 is assigned a further rider roller 25.
  • the rider rolls 25, 26 serve to equalize ink transport in the inking unit and are in different number and differently positioned widely in Find inking units.
  • a special function takes another fixed, with a visco-elastic Cover provided inking roller, which with three neighboring, in the sense of Application of rollers in an inking unit of an offset printing unit, as hard to characteristic inking rollers, namely the distribution rollers 6, 10, 14 rolling is in contact.
  • This acts as a distributor roller 7 inking roller continuously fed ink from the distributor roller 6, which they partly to the first distribution roller 14 of the roller strand 9 and in another part to the first Distributor roller 10 of the roll strand 8 releases.
  • two distributor strands 8 and 9 start from the distributor roller 7 each over two further distribution rollers 10 and 14, simple or parallel arranged transfer rollers 11 and 15, two further distribution rollers 12 and 16 lead to two inking rollers 13 and 17, respectively.
  • the inking rollers 13 and 17 take the paint application on the mounted on the forme cylinder 18 and not here printing form shown in more detail. From the form cylinder 18, the print image is over the Transfer cylinder 19, usually referred to as a rubber cylinder, on a Printing material transferred from a counter-pressure cylinder, not shown here will be carried.
  • the distribution rollers 10, 12, the transfer roller 11 and the inking rollers 3 of the roll strand 8 or the distribution rolls 14, 16, the transfer rolls 15 and the inking rollers 17 of the roller strand 9 can be individually or be tempered together in strands.
  • the temperature control of the distribution rollers 10, 12, the transfer roller 11 and the Ink application rollers 13 of the roller strand 8 or the distributor rollers 14, 16, the Transfer rollers 15 and the inking rollers 17 of the roller strand 9 can likewise also take place individually and independently of one another, but what a uniform temperature per roll strand 8 or 9 includes.
  • a temperature control circuit which contains a cooling or heating device for the temperature control medium.
  • the temperature control medium is then axially fed to and removed from the respective rollers by means of a pump via correspondingly guided lines.
  • the temperature control for the temperature control medium can be controlled via sensors directed at the surfaces of the temperature-controlled rollers.
  • the temperature control can also be directed to a roll gap S1 or S2. she can be done by a suitably tempered blowing air.
  • the blowing air can Can be fed through nozzles in individual cases. 1 shows slot nozzles 20 and 22 both from the outside of the nip between the distributor roller 7 and the distribution rollers 10, 14 arranged. There are also specially shaped slot nozzles 21 and 23 from the inside to the corresponding nips S1 and S2.
  • the temperature-controlled room is turned from a room enclosed by inking rollers Blown air is fed to each nip across the entire width of the inking unit.
  • the temperature-controlled blowing air is generated, for example, via a Heat exchanger by means of cooling or heating, with a fan taking the air from sucked in outside the printing press and in via a heat exchanger device promotes the slot nozzles 20, 21, 22, 23
  • the transfer roller 14 By tempering the nips S1 or S2 to different or the ink transfer behavior in the nips S1 becomes the same temperature and S2 changed so that the relatively transported amount of ink per nip S1 or S2 is adjustable. So from the distributor roller 7 to the Transfer roller 10 amount of ink delivered compared to the amount of ink the transfer roller 14 is discharged, raised, lowered or up be kept symmetrical level. This becomes a correspondingly definable one Ink quantity fed to the roller strand 8 or the roller strand 9. That is the coloring of the printing form can also be influenced and the characteristics of the Farbwerkes adaptable to different subjects.
  • the temperature control of individual roll gaps S1 or S2 can also by acting on the respective nip S1 or S2 interacting inking rollers with tempering medium take place by this be flowed through.
  • FIG. 2 shows a section of the inking unit already described.
  • the Transfer roller 5 and the distributor roller 6 are upstream of the distributor roller 7. Parts of roller strands are connected to the distributor roller 7.
  • a first one Roll strand has the transfer roller 10 and the distribution roller 11.
  • On the second roller train has the transfer roller 14 and the distributor roller 15.
  • the distributor roller 7 forms with the transfer roller 10 the nip S1. about an ink flow F1 is transported through the nip S1.
  • the distributor roller 7 forms with the transfer roller 14 the nip S2. Is over the nip S2 a color stream F2 transported.
  • the transfer roller 10 and the Transfer roller 14 are tempered. They are made of a tempering medium flows through, which is supplied and recirculated by means of appropriate devices becomes.
  • the temperature media flows in the transfer rollers 10 and 14 are independently controllable in terms of both the quantity and the Temperature of the temperature control medium. Therefore, on the transfer roller 10 is a Temperature level T1 and on the transfer roller
  • the distribution of the color streams F1 and F2 depends on the Temperature levels T1 and T2 then as follows:
  • Another method for influencing the ink transport in inking units is based on the knowledge that the ink release behavior or the ink acceptance behavior of Inking rollers also depend on the texture or topography of the surface of the Ink layer is determined on an inking roller. It has been shown that a comparatively rough surface of an ink layer on an inking roller in the case of ink splitting in the next nip, the transfer of printing ink hindered and the transfer of ink is reduced. That also means that the undisturbed and thus largely smooth paint layer surface better Ink accepts and thus enables better ink transport. Outgoing A further exemplary embodiment of this is shown below.
  • FIG. 3 shows the same section of the inking unit already described shown.
  • the transfer roller 5 and the distributor roller 6 are the distributor roller 7 upstream. Parts of roller strands are connected to the distributor roller 7.
  • a first roller train has the transfer roller 10 and the distributor roller 11 on.
  • a second roller train has the transfer roller 14 and the distributor roller 15 on.
  • the distributor roller 7 forms with the transfer roller 10 the nip S1.
  • An ink stream F1 is transported over the nip S1.
  • the Distribution roller 7 forms with the transfer roller 14 the nip S2.
  • On the An ink flow F2 is transported in the nip S2.
  • the transfer rollers 10 and 14 are associated with profile rollers 31 and 32.
  • the profile roller 31 is the Transfer roller 10 in front of its nip S1 with the distributor roller 7 assigned.
  • the profile roller 32 is the transfer roller 14 before the nip S2 assigned to the distributor roller 7.
  • the profile rollers 31 and 32 are with a at least on a roughened surface, but preferably in the form of knobs or Spikes.
  • the profile roller 31 is the transfer roller 10 on, off and adjustable assignable. In the same way, the profile roller 32 is the Transfer roller 14 on, off and adjustable assigned.
  • the distribution of the color streams F1 and F2 depends on the delivery the profile rollers 31 and 32 then as follows:
  • Both embodiments of the invention can be used to enable regulation can be connected to a sensor system for recording ink layer thicknesses.
  • the ink layer thicknesses in the two roller strands 8, 9 must be recorded.
  • the ink layer thicknesses can then through the described control mechanisms via tempering or roughening the color layer surfaces in the roller strands 8, 9 changed relative to each other become. Process-dependent changes can then be easily adjusted become.
  • the inking unit thus described is a preferred embodiment for the Offset, wet offset and letterpress printing is also a conventional inking unit conceivable in which, in addition to the usual design, in which there is no influence on the ink transport by means of tempering individual or group or stranded inking unit rollers is provided for the purpose of specifically influencing the color flow Temperature control of individual or multiple inking unit rollers is possible.

Claims (15)

  1. Procédé pour commander le transfert d'encre dans une unité d'encrage comportant un rouleau encreur (2), un rouleau preneur (3) ou rouleau à film, des rouleaux distributeurs (4,6 ;10,12 ;14,16), de transfert (5,7,11,15), et d'application d'encre (13,17), au moins une partie des rouleaux distributeurs (4,6 ;10,12 ;14,16) et des rouleaux de transfert (5,7,11,15) étant répartie en au moins deux séries parallèles de rouleaux (8,9) et les températures d'une ou plusieurs fentes entre des rouleaux (S1,S2) étant réglées indépendamment l'une de l'autre dans chacune des séries de rouleaux (8,9) à des valeurs à chaque fois pouvant être prédéfinies,
    caractérisé en ce que l'équilibrage de température de deux ou plusieurs fentes entre des rouleaux (S1,S2) est effectué sur un rouleau de transfert (7) se trouvant simultanément en liaison active avec toutes les séries de rouleaux (8,9) sur le côté partant vers les séries de rouleaux (8,9).
  2. Procédé selon la revendication 1,
    caractérisé en ce que l'équilibrage de température des fentes entre des rouleaux (S1,S2) est effectué par équilibrage de température des rouleaux de l'unité d'encrage (10,14) tournant à chaque fois en même temps que le rouleau de transfert (7) dans une fente entre des rouleaux (S1,S2).
  3. Procédé selon la revendication 1 à 2,
    caractérisé en ce qu'un équilibrage de température particulier des rouleaux de l'unité d'encrage (10,14) prévus pour l'équilibrage de température est effectué par l'intermédiaire d'un équilibrage de température interne au moyen d'un fluide d'équilibrage de température guidé à l'intérieur des rouleaux de l'unité d'encrage.
  4. Procédé selon la revendication 1 à 2,
    caractérisé en ce que l'équilibrage de température est effectué dans une fente entre des rouleaux (S1,S2) par introduction d'air tempéré dans la fente respective entre des rouleaux (S1,S2).
  5. Procédé pour commander le transfert d'encre dans une unité d'encrage comportant un rouleau encreur (2), un rouleau preneur (3) ou rouleau à film, des rouleaux distributeurs (4,6 ;10,12 ;14,16), de transfert (5,7,11,15), et d'application d'encre (13,17), au moins une partie des rouleaux distributeurs (4,6 ;10,12 ;14,16) et des rouleaux de transfert (5,7,11,15) étant répartie en au moins deux séries parallèles de rouleaux (8,9), la surface d'une couche d'encre sur un ou plusieurs des rouleaux de l'unité d'encrage étant rendue rugueuse dans les séries de rouleaux (8,9),
    caractérisé en ce que les surfaces d'une couche d'encre sur un ou plusieurs des rouleaux de l'unité d'encrage (10,14) dans les séries de rouleaux (8,9) avant l'entrée dans les fentes correspondantes entre les rouleaux (S1,S2) sont rendues rugueuses indépendamment l'une de l'autre avec un rouleau de transfert (7) se trouvant en liaison active avec les séries de rouleaux (8,9).
  6. Unité d'encrage, comportant un rouleau encreur (2), un rouleau preneur (3) ou rouleau à film, des rouleaux distributeurs (4,6 ;10,12 ;14,16), de transfert (5,7,11,15), et d'application d'encre (13,17), au moins une partie des rouleaux distributeurs (4,6 ;10,12 ;14,16) et des rouleaux de transfert (5,7,11,15) étant répartie en au moins deux séries parallèles de rouleaux (8,9), et comportant des dispositifs d'équilibrage de température sur un ou plusieurs rouleaux dans au moins une des séries de rouleaux (8,9), qui sont réglables indépendamment l'un de l'autre, pour la mise en oeuvre du procédé selon la revendication 1,
    caractérisée en ce que les dispositifs d'équilibrage de température sont prévus sur une ou plusieurs des fentes entre les rouleaux (S1,S2) dans au moins une des séries de rouleaux (8,9) sur un rouleau de répartition (7) se trouvant en liaison active avec toutes les séries de rouleaux (8,9) sur le côté partant vers les séries de rouleaux (8,9).
  7. Unité d'encrage selon la revendication 6,
    caractérisée en ce qu'au moins deux séries de rouleaux parallèles (8,9) dérivent du rouleau de répartition (7), et en ce que le rouleau de répartition (7) présente une surface tendre.
  8. Unité d'encrage selon la revendication 7,
    caractérisée en ce que les rouleaux de transfert (10,14), voisins du rouleau de répartition (7), sont réalisés comme rouleaux tempérés.
  9. Unité d'encrage selon la revendication 7,
    caractérisée en ce que des dispositifs de soufflage (20,21,22,23) pour amener de l'air de soufflage tempéré sont associés aux rouleaux de transfert (10,14) voisins du rouleau de répartition (7) et/ou aux fentes entre les rouleaux (S1,S2) formées avec ceux-ci.
  10. Unité d'encrage selon une des revendications précédentes 6-9,
    caractérisée en ce que plus de deux rouleaux distributeurs tempérés intérieurement (10,14) sont agencés autour du rouleau de répartition (7) de sorte que les positions à chaque fois entre un des rouleaux distributeurs (10,14) et le rouleau de répartition (7) sont librement réglables.
  11. Unité d'encrage selon une des revendications précédentes 6-10,
    caractérisée en ce que plusieurs rouleaux de répartition centraux (7) peuvent être prévus entre à chaque fois plus de deux rouleaux distributeurs (6,10,14).
  12. Unité d'encrage selon une des revendications précédentes 6-11,
    caractérisée en ce que des rouleaux de transfert (11,15) sont prévus dont les revêtements du type caoutchouc présentent une conductibilité en température augmentée.
  13. Unité d'encrage selon une des revendications précédentes 6-12,
    caractérisée en ce que lé circuit d'agent d'équilibrage de température est lié, par une technique de régulation, à des mesures d'épaisseur de la couche d'encre.
  14. Unité d'encrage comportant un rouleau encreur (2), un rouleau preneur (3) ou rouleau à film, des rouleaux distributeurs (4,6;10,12;14,16), de transfert (5,7,11,15), et d'application d'encre (13,17), au moins une partie des rouleaux distributeurs (10,12;14,16) et des rouleaux de transfert (11,15) étant répartie en au moins deux séries parallèles de rouleaux (8,9), la surface d'une couche d'encre sur un ou plusieurs rouleaux de l'unité d'encrage dans les séries de rouleaux (8,9) étant rendue rugueuse, pour la mise en oeuvre du procédé selon la revendication 5,
    caractérisée en ce que des dispositifs pour rendre rugueux sont prévus de façon indépendante l'un de l'autre sur un ou plusieurs des rouleaux de transfert (10,14) en liaison avec les fentes entre les rouleaux (S1,S2) dans la dérivation des séries de rouleaux (8,9) sur un rouleau de répartition (7) avant l'entrée dans la fente respective entre les rouleaux (S1,S2).
  15. Unité d'encrage selon la revendication 14,
    caractérisée en ce qu'au moins un des rouleaux de transfert (10,14) sur une ou plusieurs des fentes entre les rouleaux (S1,S2) dans au moins une des séries de rouleaux (8,9) est associé de façon réglable à un rouleau profilé (31,32) présentant un profil de surface.
EP19980111516 1998-06-23 1998-06-23 Procédé et dispositif pour réguler le transfert de l'encre dans un appareil d'encrage Expired - Lifetime EP0974460B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19980111516 EP0974460B1 (fr) 1998-06-23 1998-06-23 Procédé et dispositif pour réguler le transfert de l'encre dans un appareil d'encrage
DE59800196T DE59800196D1 (de) 1998-06-23 1998-06-23 Verfahren und Vorrichtung zur Steuerung des Farbtransportes in einem Farbwerk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19980111516 EP0974460B1 (fr) 1998-06-23 1998-06-23 Procédé et dispositif pour réguler le transfert de l'encre dans un appareil d'encrage

Publications (2)

Publication Number Publication Date
EP0974460A1 EP0974460A1 (fr) 2000-01-26
EP0974460B1 true EP0974460B1 (fr) 2000-07-12

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EP19980111516 Expired - Lifetime EP0974460B1 (fr) 1998-06-23 1998-06-23 Procédé et dispositif pour réguler le transfert de l'encre dans un appareil d'encrage

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EP (1) EP0974460B1 (fr)
DE (1) DE59800196D1 (fr)

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CN101945766B (zh) * 2008-02-23 2013-10-23 曼罗兰纸张有限责任公司 在加工设备中给印版染色的方法

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101945766B (zh) * 2008-02-23 2013-10-23 曼罗兰纸张有限责任公司 在加工设备中给印版染色的方法

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DE59800196D1 (de) 2000-08-17
EP0974460A1 (fr) 2000-01-26

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