EP1033245B1 - Dispositif de mouillage à haute fréquence effective de pulvérisation - Google Patents

Dispositif de mouillage à haute fréquence effective de pulvérisation Download PDF

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Publication number
EP1033245B1
EP1033245B1 EP00102164A EP00102164A EP1033245B1 EP 1033245 B1 EP1033245 B1 EP 1033245B1 EP 00102164 A EP00102164 A EP 00102164A EP 00102164 A EP00102164 A EP 00102164A EP 1033245 B1 EP1033245 B1 EP 1033245B1
Authority
EP
European Patent Office
Prior art keywords
spray
spray nozzles
nozzle
nozzles
recited
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
EP00102164A
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German (de)
English (en)
Other versions
EP1033245A1 (fr
Inventor
Roger Robert Belanger
Douglas Joseph Dawley
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP1033245A1 publication Critical patent/EP1033245A1/fr
Application granted granted Critical
Publication of EP1033245B1 publication Critical patent/EP1033245B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/20—Details
    • B41F7/24—Damping devices
    • B41F7/30—Damping devices using spraying elements

Definitions

  • the present invention relates generally to a spray device for a printing press, in particular for a web-fed offset printing machine, according to the preamble of Claim 1.
  • dampening solution In modern printing processes such. B. offset printing on certain rollers transfer dampening solution and ink to a printing press. The color will then turn on a substrate, e.g. B. paper transferred.
  • the dampening solution is in on the rollers sufficient quantity is required to achieve the desired transfer of color to the To ensure printing stock.
  • the dampening solution consists of one ink-repellent water solution, which is on the non-printing sections of a Distributed pressure plate and thus prevents coloring of the non-printing sections.
  • Controlling the amount and distribution of dampening solution is extremely important: At insufficient moistening there is a risk that the ink will not print Spreads sections. If the dampening is too strong, the excess dampening solution must be used caught and derived, and there is a risk of damage to the Too much moisture. An even, precisely dosed Applying dampening solution is therefore desirable.
  • the spray dampening system for a printing press comprises a large number of spray nozzles, which in particular on a surface of a target element a dampening roller in a printing unit directed spray jets.
  • Each of the spray nozzles goes through a spray cycle with a specified spray frequency and an individual Spray phase shift, the individual spray phase shifts such are synchronized that the effective frequency of the applied to the surface Spray jets are higher than the specified frequency.
  • dampening solution in one Spray dampening system of a printing press uses a variety of dampening solutions Spray nozzles sprayed onto a surface of a target element in the printing unit, each the spray nozzles a spray cycle with a predetermined frequency and an individual Spray phase shift goes through.
  • the individual spray phase shifts are synchronized so that the effective frequency of the applied to the surface Spray jets are higher than the specified frequency.
  • the present invention provides an increased effective frequency of Spray jets reached, which goes beyond the limits of individual nozzles. hereby without the use of new, expensive nozzle technology Spray dampening systems and the quality of the dampening solution application can be significantly increased. Furthermore, the benefits of a pulsed spray dampening system are retained while the one achieved The result of the moistening is equivalent to a continuous dampening solution application.
  • FIG. 1A shows a perspective view of a spray dampening system of the prior art with a spray bar 2, spray nozzles 4 and a generally cylindrical one Longitudinal axis 5 rotatable roller 6.
  • a pressurized, over the spray bar 2nd supplied dampening solution is in the form of spray or spray mist 8 on the Moving surface 7 of the roller 6 applied by the spray nozzles 4 periodically be opened and closed.
  • the spray nozzles generally go through the cycle at the same time and with a common frequency, which is based on various parameters, e.g. B. the printing speed can be varied.
  • Figure 1B shows a cross section of the spray dampening unit of the prior art shown in FIG. 1A Technology. From Fig. 1C, as well as from Fig. 1A and 1B it can be seen that the spray nozzles of the spray dampening system of the prior art in a to the longitudinal axis 5 of the roller 6 in Are arranged essentially parallel row.
  • 2A, 2B and 2C is an embodiment of an inventive Spray dampening system shown.
  • a series of spray nozzles 40a, 40b and 40c are arranged, each with a fountain solution spray 80 on the surface 62 of the rotating about the longitudinal axis 64, in Align substantially cylindrical roller 60.
  • the spray nozzles are above the surface 62 arranged in a rectangular array of M x N nozzles, as shown in Fig. 2C M is the number of rows and N is the number of columns. In the illustrated For example, M is three and N is eight.
  • the spray nozzle assemblies 40a, 40b and 40c are activated periodically, i.e. H. with a predetermined frequency f opened and closed. According to the present In the exemplary embodiment, the nozzles are synchronized as follows:
  • the cycle of the nozzle assembly 40b is out of phase with the nozzle assembly 40a and the nozzle assembly 40c is out of phase with the nozzle assembly 40b.
  • the phase shift is selected such that the nozzle arrangement 40a directs a fountain solution jet onto the moving surface 62 of the roller 60 at a time t a .
  • spray nozzle arrangement 40b directs a dampening solution jet onto surface 62.
  • nozzle arrangement 40c subsequently directs a dampening solution spray jet onto surface 62 at a time t c , which converts with respect to time t b a predetermined period of time is offset.
  • the nozzle arrangements thus spray one after the other, starting with the nozzle arrangement 40a.
  • the sequence is preferably cyclical, ie 40a, 40b, 40c, 40a, 40b, 40c etc.
  • the phase shifts between the nozzle arrangements 40a and 40b and between the nozzle arrangements 40b and 40c are preferably identical, so that the time period between the activation of the spray nozzle arrangements is always the same is.
  • the nozzles of the different nozzle arrangements preferably have the same pulse length, ie the time during which the nozzles are open is preferably the same for all nozzles.
  • FIG. 3A shows a schematic top view of a developed section of the surface 7 of the roller 6 of the spray dampening system of the prior art shown and described in FIGS. 1A, 1B and 1C.
  • the spray areas 9 symbolize in a simplified manner the dampening solution application generated by means of individual, sequential spray jets from the nozzles 4 on the surface 7, while the latter moves past the nozzle 4 in the direction D due to the rotary movement of the roller 6.
  • X A shows the cycle length of the nozzle 4.
  • X A depends on the frequency of the nozzle and the (tangential) surface speed of the surface 7.
  • the length Y A of the spray area and the length Z A of the dry area depend on the working cycle of the nozzle and the surface speed of the surface 7.
  • FIG. 3B shows a schematic top view of a developed section of the surface 62 of the roller 60 of the embodiment of the spray dampening device according to the invention shown in FIGS. 2A, 2B and 2C and described above.
  • Three spray nozzles 40a, 40b and 40c are shown, which represent a column of the M x N spray nozzle arrangement shown in FIG. 2C.
  • the spray areas 90a, 90b and 90c represent, in simplified form, the application of dampening solution to the surface 62 by the individual fountain solution spray jets which are emitted one after the other from the spray nozzles 40a, 40b and 40c, while the latter moves in the direction D due to the rotary movement of the roller 60 moved past the nozzles.
  • the nozzles 40a, 40b and 40c are opened and closed cyclically one after the other, this being done out of phase and preferably synchronized in time.
  • the frequency f of one nozzle is the same for all nozzles 40a, 40b and 40c.
  • X B shows the cycle length of a nozzle.
  • Y B and Z B represent the length of a spray area and a dry area, respectively, on surface 62. If the frequency f of the nozzle cycle is equal to the frequency of the prior art spray dampener shown in Fig. 3A, and the (tangential) surface speed is Area 62 is equal to the surface speed of area 7 of the prior art spray dampener shown in FIG.
  • the cycle length X B is equal to the cycle length X A of the prior art spray dampener shown in FIG. 3A.
  • the cycle time of the nozzles 40a, 40b and 40c is selected such that the length Y B of the spray area is one third of the length Y A of the spray area of the prior art spray dampening device shown in FIG. 3A and the length Z B of the dry one Area corresponds to a third of the length Z A of the dry area of the prior art spray dampening device shown in FIG. 3A.
  • the effective spray frequency of the device according to the invention is accordingly three times the device of the prior art.
  • the spray device according to the invention can have a different number of spray strips 20 and accordingly of spray nozzle rows M.
  • the effective frequency of the spray jets applied to surface 62 when using M rows of synchronized, out of phase activated spray nozzles as described above is M times the cycle frequency of a single spray nozzle.
  • FIG M x N spray nozzles 40 are arranged offset.
  • the spray nozzles on the spray bar 20b are laterally displaced with respect to the spray nozzles 20a and 20c. This staggered arrangement causes a correspondingly offset arrangement of the spray areas on the surface 62 the roller 60.
  • the spray nozzles are in groups 41 on one Spray bar 20 arranged, each group, for example, three spray nozzles 41d, 41e and 41f includes.
  • the three nozzles in a group are aligned in the same way, so that they Spray on substantially the same area of surface 62 of roller 60 judge.
  • the three nozzles of each group are out of phase activated one after the other.
  • the spray nozzle 41d is first opened and closed again. A predetermined time later, the spray nozzle 41e is opened and closed again, and again the same period later, the spray nozzle 41f opened and closed again.
  • the three spray nozzles of the other groups 41 are preferably according to the same time delay pattern, i.e. H.
  • Each spray nozzle group is one of the embodiments of the present described herein Spray dampening according to the invention produces an essentially that in FIG. 3B corresponding spray pattern shown, but the nozzles are arranged to save space.
  • FIG. 5B a plurality of spray bars 20 corresponding to the embodiment shown in FIG. 5A Groups 41 of three nozzles 41d, 41e and 41f are provided, so that a rectangular M x N arrangement of nozzle groups in M rows and N columns results.
  • 5B is one exemplary arrangement of three rows a, b and c of spray strips 20a, 20b and 20c shown.
  • the nozzles of each group preferably activated with a time delay pattern and are preferably with the corresponding nozzles of another group, as described above with reference to FIG. 5A and a single spray bar 20 is described.
  • the nozzle rows a, b and c are preferably activated with a phase shift relative to one another, so that the nozzles on the spray bar 20b are synchronized to be one predetermined period of time after the corresponding nozzles on the spray bar 20a activated and the nozzles on the spray bar 20c are synchronized to be one predetermined period of time after the corresponding nozzles on the spray bar 20b activated become.
  • the time delays between the spray bars are preferably identical.
  • the phase shift based on the Nozzle group columns occur so that the nozzle groups in the individual columns of the M x N arrangement are out of phase with respect to another column. That way you can the nozzle arrangement uses a two-dimensional phase shift.
  • nozzle arrangements are also conceivable, e.g. B. in triangular shape, as well as alternative Combinations of nozzle groups in regular or irregular geometric Arrangements with different numbers of nozzles per group. It can too different phase shift patterns, e.g. B. also with different working cycles of the nozzles.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Nozzles (AREA)

Claims (13)

  1. Dispositif de pulvérisation pour une machine d'impression comportant une multiplicité de buses de pulvérisation (40a, 40b, 40c, 41d, 41e, 41f) pour diriger des jets de pulvérisation (80) sur une surface (62) d'un élément cible (60) de la machine d'impression, caractérisé en ce que chacune des buses de pulvérisation (40a, 40b, 40c, 41d, 41e, 41f) exécute un cycle avec une fréquence prédéterminée et un déphasage prédéterminé, les déphasages individuels des buses étant synchronisés de telle sorte que la fréquence effective des jets de pulvérisation (80), dirigés sur la surface (62), est supérieure à la fréquence prédéterminée.
  2. Dispositif selon la revendication 1, caractérisé en ce que les buses de pulvérisation sont disposées dans une multiplicité M de rangées, M étant un nombre entier tel qu'une des rangées possèdent au moins une buses de pulvérisation (40a, 40b, 40c, 41d, 41e, 41f) et que le déphasage individuel de la au moins une buse de pulvérisation (40a, 40b, 40c, 41d, 41e, 41f) correspond au déphasage individuel de la rangée, les déphasages individuels des rangées étant synchronisés de telle sorte que la fréquence effective des jets de pulvérisation (80) dirigés sur la surface (62) correspond à M fois la fréquence prédéterminée.
  3. Dispositif selon la revendication 2, caractérisé en ce que la surface (62) est déplacée par rapport aux buses de pulvérisation (40a, 40b, 40c, 41d, 41e, 41f) et que les multiples rangées de buses de pulvérisation s'étendent essentiellement orthogonalement à la direction de déplacement (D) de l'élément cible (60).
  4. Dispositif selon la revendication 1, caractérisé en ce que l'élément cible (60) est un cylindre rotatif.
  5. Dispositif selon la revendication 1, caractérisé en ce que les buses de pulvérisation (40a, 40b, 40c, 41d, 41e, 41f) sont disposées dans une multiplicité de rangées de sorte qu'elles forment un dispositif de buses de pulvérisation.
  6. Dispositif selon la revendication 1, caractérisé en ce que les buses de pulvérisation (41d, 41e, 41f) sont disposées dans au moins une rangée et que les buses de pulvérisation (41d, 41e, 41f) de la ou de chacune des rangées sont disposées selon une multiplicité de groupes (41), chaque groupe (41) comprenant au moins deux buses de pulvérisation (41d, 41e, 41f).
  7. Dispositif selon la revendication 6, caractérisé en ce que les buses de pulvérisation (41d, 41e, 41f) d'un groupe (41) sont orientées de telle sorte qu'elles dirigent un jet de pulvérisation (80) essentiellement sur la même zone.
  8. Dispositif selon la revendication 6, caractérisé en ce que chaque groupe (41) comprend un nombre identique de buses de pulvérisation (41d, 41e, 41f) et que les déphasages des buses de pulvérisation (41d, 41e, 41f) d'un groupe (41) sont synchronisés de telle sorte que la fréquence effective des jets de pulvérisation (80) dirigés vers la surface (62) correspond à la fréquence prédéterminée multipliée par le nombre de buses de pulvérisation (41d, 41e, 41f) pour chaque groupe (41).
  9. Dispositif selon la revendication 1, caractérisé en ce que la surface (62) est un cylindre, que les buses de pulvérisation (41a, 41b, 41c, 41d, 41e, 41f) sont disposées selon une multiplicité de M rangées, M étant un nombre entier, que les buses s'étendent orthogonalement à un axe longitudinal du cylindre et comprennent au moins une buse de pulvérisation (40a, 40b, 40c, 41d, 41e, 41f) dont le déphasage individuel correspond au déphasage individuel d'une rangée, les déphasages individuels des rangées étant synchronisés de telle sorte que la fréquence effective des jets de pulvérisation (80) dirigés sur la surface (62) de l'élément cible (60) correspond au multiple M fois la fréquence prédéterminée.
  10. Procédé pour appliquer un agent de mouillage dans une machine d'impression par pulvérisation d'un agent de mouillage sous la forme de jets de pulvérisation sur une surface d'un élément cible de la machine d'impression au moyen d'une multiplicité de buses de pulvérisation, caractérisé en ce que l'activité des buses de pulvérisation est exécutée avec une fréquence prédéterminée et un déphasage individuel, les déphasages individuels étant synchronisés de telle sorte que la fréquence effective des jets de pulvérisation dirigés sur la surface est supérieure à la fréquence prédéterminée.
  11. Procédé selon la revendication 10, caractérisé en ce que les buses de pulvérisation sont disposés selon une multiplicité de M rangées, que M est un nombre entier, que les rangées comprennent chacune au moins une buse de pulvérisation, que le déphasage individuel de la ou des buses de pulvérisation dans une rangée correspond au déphasage individuel d'une rangée et que les déphasages individuels des rangées sont synchronisés de telle sorte que la fréquence effective des jets de pulvérisation dirigés sur la surface est égale à M fois la fréquence prédéterminée.
  12. Procédé selon la revendication 11, caractérisé en ce que la surface est déplacée par rapport aux buses de pulvérisation et que les multiples buses de pulvérisation sont essentiellement orthogonales à la direction de déplacement de la surface qui se déplace.
  13. Procédé selon l'une des revendications 10 à 12, caractérisé en ce que l'élément cible est un cylindre.
EP00102164A 1999-03-01 2000-02-08 Dispositif de mouillage à haute fréquence effective de pulvérisation Expired - Lifetime EP1033245B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/259,927 US6327974B1 (en) 1999-03-01 1999-03-01 Spray dampening device having high effective spray frequency and method of using
US259927 1999-03-01

Publications (2)

Publication Number Publication Date
EP1033245A1 EP1033245A1 (fr) 2000-09-06
EP1033245B1 true EP1033245B1 (fr) 2002-05-15

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EP00102164A Expired - Lifetime EP1033245B1 (fr) 1999-03-01 2000-02-08 Dispositif de mouillage à haute fréquence effective de pulvérisation

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US (1) US6327974B1 (fr)
EP (1) EP1033245B1 (fr)
JP (1) JP2000246864A (fr)
AT (1) ATE217577T1 (fr)
DE (2) DE50000164D1 (fr)

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DE10258325B4 (de) 2002-10-25 2005-08-18 Koenig & Bauer Ag Verfahren zur Einstellung eines Sprühfeuchtwerks
DE10317470B4 (de) * 2003-04-16 2005-10-06 Technotrans Ag Sprühfeuchtwerk
KR20050041907A (ko) * 2003-10-31 2005-05-04 발드윈-저팬 리미티드 축임물 공급장치
US20070045453A1 (en) * 2005-08-23 2007-03-01 Goss International Americas, Inc. Central manifold supply for spray bar
DE102006055584A1 (de) * 2006-11-24 2008-05-29 Man Roland Druckmaschinen Ag Verfahren zum Betreiben eines Feuchtwerks, Feuchtwerk sowie Druckwerk
FR2909031B1 (fr) * 2006-11-24 2011-03-04 Goss Int Montataire Sa Machine d'impression et procede correspondant.
DE102007043857A1 (de) * 2007-09-14 2009-03-19 Manroland Ag Verfahren zum Betreiben einer Rollendruckmaschine
DE102014218452A1 (de) 2014-09-15 2016-04-07 Koenig & Bauer Ag Vorrichtungen und Verfahren zur Einstellung und/oder Änderung eines sich in Richtung Druckbreite erstreckenden Profils in der Feuchtmittelführung sowie Druckwerk mit einer Vorrichtung zur Einstellung und/oder Änderung des Profils
DE102014218451B4 (de) 2014-09-15 2018-05-03 Koenig & Bauer Ag Vorrichtungen und Verfahren zur Einstellung und/oder Änderung eines sich in Richtung Druckbreite erstreckenden Profils in der Feuchtmittelführung sowie Druckwerk mit einer Vorrichtung zur Einstellung und/oder Änderung des Profils
CN107073932B (zh) * 2014-09-15 2018-11-09 柯尼格及包尔公开股份有限公司 对印刷装置的润湿介质引导中的轮廓的调整和/或改变
DE102018104534B3 (de) 2018-02-28 2019-04-25 Baldwin Technology Gmbh Sprührohr und druckmaschinenwalzen-reinigungsvorrichtung mit einem sprührohr

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Also Published As

Publication number Publication date
JP2000246864A (ja) 2000-09-12
DE10005908A1 (de) 2000-09-07
EP1033245A1 (fr) 2000-09-06
DE50000164D1 (de) 2002-06-20
ATE217577T1 (de) 2002-06-15
US6327974B1 (en) 2001-12-11

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