WO2003053694A1 - Procedes et elements pyrotechniques pour humidifier sans contact un cylindre ou un rouleau de machine d'impression a plat - Google Patents

Procedes et elements pyrotechniques pour humidifier sans contact un cylindre ou un rouleau de machine d'impression a plat Download PDF

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Publication number
WO2003053694A1
WO2003053694A1 PCT/DE2002/004608 DE0204608W WO03053694A1 WO 2003053694 A1 WO2003053694 A1 WO 2003053694A1 DE 0204608 W DE0204608 W DE 0204608W WO 03053694 A1 WO03053694 A1 WO 03053694A1
Authority
WO
WIPO (PCT)
Prior art keywords
dampening
cylinder
unit according
dampening unit
dampening solution
Prior art date
Application number
PCT/DE2002/004608
Other languages
German (de)
English (en)
Inventor
Heinrich Konrad Grosshauser
Original Assignee
Koenig & Bauer Aktiengesellschaft
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 Koenig & Bauer Aktiengesellschaft filed Critical Koenig & Bauer Aktiengesellschaft
Priority to AU2002357975A priority Critical patent/AU2002357975A1/en
Priority to EP02791635A priority patent/EP1456031A1/fr
Publication of WO2003053694A1 publication Critical patent/WO2003053694A1/fr

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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
    • B41F7/37—Damping devices with supercooling for condensation of air moisture

Definitions

  • the invention relates to methods and dampening units for contactless moistening of a cylinder or a roller of a planographic printing machine according to the preamble of claim 1, 2, 8, 10, 11 or 43.
  • the moistening of cylinders or rollers in the printing unit of planographic printing presses is of great importance for the function of the printing unit, since in offset printing uniform wetting of the printing plate surface must be provided with a fountain solution in order to prevent an acceptance of ink at the non-printing areas of the printing plate ,
  • the humidification can not be achieved by uncontrolled wet-making, but it is rather a sensitive, controlled and uniform as possible application of fountain solution required.
  • a disadvantage of the known contactless dampening works is that the wetting of the roller required flow of dampening solution mist is not absolutely uniform. Due to the resulting differences in the dampening solution flow follows an uneven wetting of the cylinder surface. The required transport flow also dries off a certain part of the moisture on the cylinder surface. In addition, the known dampening units are relatively maintenance-intensive.
  • DE 629 700 A discloses a dampening unit in which water vapor is produced by means of a liquid atomizer and a heating device. This steam, d. H. no aerosol, is passed to moisten on a planographic printing plate.
  • JP 05-154 981 A and DE 21 27 021 A describe dampening units in which heated steam is passed to the pressure plate. A change in the amount of dampening solution deposited on the printing plate takes place via temperature changes.
  • the invention has for its object to provide methods and dampening units for contactless moistening of a cylinder or a roll of a planographic printing machine.
  • the invention is based on the idea of precipitating the fountain solution droplets contained in the fountain solution by condensation on the surface of the planographic printing form or of the cylinder or of the roller to be moistened.
  • the deposition of dampening solution by condensation is achieved in that the dampening mist has a higher temperature than the cylinder surface.
  • the amount of a dampening solution, which in a gas atmosphere to saturation, d. H. can be taken up to the precipitation of the dampening solution from the gas atmosphere depends on the temperature of the gas atmosphere. Ie. at higher temperatures, a larger absolute amount of moisture can be absorbed by the gas atmosphere.
  • the fountain solution mist represents such a gas atmosphere in which the dampening solution is finely divided. If the fountain solution mist is now cooled by contact with the colder cylinder surface, the saturation limit is crossed by the corresponding temperature reduction, so that the dampening solution contained in the dampening agent mist condenses in part on the cooler planographic printing plate.
  • the moistening of the plate cylinder is often done indirectly, d. H. with the interposition of transfer rollers between the actual dampening unit and the plate cylinder, thereby achieving a more uniform distribution of dampening solution on the plate cylinder. Since a very uniform distribution of dampening solution is possible with the method, the plate cylinder can also be moistened directly. For this purpose, the plate cylinder itself is moved by the dampening agent mist, so that the fountain solution condenses directly on the printing plates of the plate cylinder.
  • Relative humidity refers to the percentage ratio between the actual absolute dampening solution content in the gas atmosphere and the maximum possible dampening solution content of the gas atmosphere at a certain temperature. At a relative humidity of 100%, therefore, the saturation limit of the gas atmosphere is reached at the corresponding temperature, so that the dampening solution dissolved in the gas atmosphere precipitates readily. In order to ensure a reliable functioning of the method according to the invention, the dampening solution should precipitate only when approaching the cooler cylinder surface and condense on the cylinder surface. The relative humidity in the actual dampening mist should therefore not be higher than about 95%, since otherwise the dampening solution contained in the dampening agent mist can be uncontrolled.
  • the dampening mist should have a relative humidity of more than 65%. Particularly advantageous is a relative humidity range of 80 to 90%, in particular a relative humidity of about 85% has been found.
  • the amount of water separated by condensation must be changed. This is especially the case, for example, when the printing speed is increased or decreased.
  • the condensation process for separating the dampening solution on the cylinder surface should be controllable or controllable. The construction of corresponding control paths or control loops can be made possible, for example, by, for example, increasing or decreasing the atomized dampening solution quantity.
  • the relative humidity in the fountain solution mist can be changed so that condenses at a corresponding temperature difference more or less dampening solution.
  • the amount of atomized dampening solution and the associated change in the relative humidity in the dampening mist and the temperature difference between dampening agent mist and cylinder surface can be changed. Because the higher the temperature difference between dampening agent mist and cylinder surface, the more dampening solution is deposited by condensation on the cylinder surface.
  • either the temperature of the dampening solution to be atomized for example the temperature of the water to be atomized, and / or the temperature of the cylinder surface can be changed.
  • the dampening solution can be heated by a corresponding dampening means temperature control device and / or the cylinder surface can be cooled by a corresponding cooling device, while the temperature difference between dampening agent mist and cylinder surface should be at least about 1 ° C.
  • Fig. 1 shows a first embodiment of a dampening unit in a schematically illustrated cross section
  • FIG. 2 shows the dampening unit according to FIG. 1 in the printing unit of an offset printing press in a cross section shown schematically;
  • Fig. 3 shows a second embodiment of a dampening unit in a schematically illustrated cross-section.
  • a schematically illustrated in Fig. 1 cylinder 01, z. B. plate cylinder 01, or a roller is by means of two rollers 02; 03, z. B. inking rollers 02; 03 supplied from an inking unit not shown with ink.
  • a fountain solution for example water
  • the humidification of the cylinder surface 04 is effected by use of a damping unit 06, shown schematically in cross-section.
  • dampening unit 06 a plurality of trained in the nature of Ultraschallzerstäubern 07 Luftbefeuchtungs drivingen 07 are provided by the use of a fountain solution present in a dampening solution 08, namely water, can be atomized.
  • the fountain solution reservoir 08 is connected via an inlet 09 and a return 11 to a heating circuit, not shown, wherein the dampening solution is pumped through the fountain solution 08 permanently.
  • the level in the fountain solution reservoir 08 does not fall below a certain lower limit and, moreover, the dampening solution in the fountain solution reservoir 08 always has a preselectable constant temperature.
  • the liquid dampening solution in the fountain solution reservoir 08 is atomized in such a way that a fountain solution 12 formed by a water aerosol is formed.
  • the water drops in the water aerosol should have a pressure gauge in the range of about 0.01 ⁇ m to 100 ⁇ m.
  • a desired relative humidity in the dampening agent mist 12 can be set.
  • the temperature of the fountain solution mist 12 may be in the range of 32 ° C to 36 ° C, in particular in the range of 33 ° C to 35 ° C, for example, have a temperature of 34 ° C.
  • a cylinder surface temperature of 30 ° C to 34 ° C, especially in the range of 31 ° C to 32 ° C would be advantageous.
  • a box 13 from the ambient atmosphere.
  • the box 13 is open on one side and is covered on the open side by the cylinder surface 04 of the plate cylinder 01. This ensures that the dampening agent mist 12 contained in the box 13 does not escape unintentionally into the ambient atmosphere, but effectively condenses on the cylinder surface 04 of the plate cylinder 01.
  • a pivotally mounted lid 14 is provided, so that the interior of the box 13 can be made accessible by opening the lid 14 for maintenance.
  • the dampening unit 06 is arranged on the right side of the plate cylinder 01.
  • the dampening unit 06 is formed mirror-inverted relative to its center in the direction of the longitudinal axis of the plate cylinder 01, so that when the direction of rotation of the plate cylinder 01, the dampening unit 06 can be arranged on the left side of the plate cylinder 01. This is indicated by dashed lines in Fig. 1.
  • the cylinder surface 04 sweeps the interior of the box 13 along the dampening agent mist 12.
  • the box 13 is formed in cross-section such that between the cylinder surface 04 and the inside of the box 13 directed in the direction of rotation of the plate cylinder 01 gap 16 is formed, which narrows continuously to the exit point 17 of the plate cylinder 01 from the box 13. By the narrowing of the gap 16, a compression nozzle is formed, so that the deposition of the dampening solution on the cylinder surface 04 is enhanced.
  • the contact zone between the plate cylinder 01 and the inking roller 03 is also arranged, so that the dampening solution absorbed by the dampening unit 06 on the cylinder surface 04 is conveyed directly into the contact gap between the plate cylinder 01 and inking roller 03.
  • Fig. 2 is a section of a printing unit 18 with two blanket cylinders 19; 21, the plate cylinder 01, the inking rollers 02; 03 and a paint transfer roller 22 shown schematically.
  • the dampening unit 06 is mounted according to the arrangement in Fig. 1 on the right side of the plate cylinder 01.
  • In the area between the blanket cylinder 21 and the dampening unit 06 or between the inking roller 02 and the blanket cylinder 21 are two covers 23; 24 attached, by which the cylinder surface 04 of the plate cylinder 01 is covered over the entire width of the plate cylinder 01 from the outside atmosphere.
  • the gap 26 between the cylinder surface 04 and the covers 23 and 24 results in the result thus an atmosphere which substantially corresponds to the conditions in the interior of the box 13.
  • the distance between cover 23; 24 and cylinder surface 04 in the gap 26 is about 5 to 50 mm, in particular 10 mm.
  • the effectiveness of dampening solution separation by condensation can be significantly increased.
  • a second embodiment of a dampening unit 27 for moistening the plate cylinder 01 is shown schematically.
  • the function of the dampening unit 27 for atomizing the fountain solution of the humidifier 07 and the fountain solution 08 corresponds to that of the dampening 06.
  • a gap 16 is formed, which act through its increasing constriction as a compression nozzle during operation of the plate cylinder 01 in a clockwise direction can.
  • a gap 28 is formed at the dampening unit 27 from the upper part of the box 13, which narrows increasingly from the inner of the box 13 to the upper exit point 17.
  • An advantage of the dampening unit 27 is in particular that it does not have to be relocated even when reversing the direction of rotation of the plate cylinder 01.
  • a compression nozzle is formed either from the gap 16 or from the gap 28.

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

Abstract

L'invention concerne des procédés et des éléments pyrotechniques permettant d'humidifier sans contact un cylindre ou un rouleau de machine d'impression à plat au moyen d'un brouillard d'agent humidifiant, c.-à-d. au moyen d'un aérosol. Le brouillard d'agent humidifiant présente une température au moins légèrement supérieure à celle d'un châssis d'impression à plat à humidifier du cylindre.
PCT/DE2002/004608 2001-12-20 2002-12-17 Procedes et elements pyrotechniques pour humidifier sans contact un cylindre ou un rouleau de machine d'impression a plat WO2003053694A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2002357975A AU2002357975A1 (en) 2001-12-20 2002-12-17 Method and dampening system for non-contact dampening of a cylinder or a roller of a flat bed print machine
EP02791635A EP1456031A1 (fr) 2001-12-20 2002-12-17 Procedes et elements pyrotechniques pour humidifier sans contact un cylindre ou un rouleau de machine d'impression a plat

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2001162788 DE10162788A1 (de) 2001-12-20 2001-12-20 Verfahren und Feuchtwerk zur kontaktlosen Befeuchtung eines Zylinders oder einer Walze im Druckwerk einer Offsetdruckmaschine
DE10162788.2 2001-12-20

Publications (1)

Publication Number Publication Date
WO2003053694A1 true WO2003053694A1 (fr) 2003-07-03

Family

ID=7710061

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2002/004608 WO2003053694A1 (fr) 2001-12-20 2002-12-17 Procedes et elements pyrotechniques pour humidifier sans contact un cylindre ou un rouleau de machine d'impression a plat

Country Status (4)

Country Link
EP (1) EP1456031A1 (fr)
AU (1) AU2002357975A1 (fr)
DE (1) DE10162788A1 (fr)
WO (1) WO2003053694A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103317827A (zh) * 2012-03-21 2013-09-25 施乐公司 数字平版印刷系统中通过冷凝的润湿液沉积

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011075600B4 (de) 2011-05-10 2014-02-20 Koenig & Bauer Aktiengesellschaft Feuchtwerk eines Offset-Druckwerks
DE102011075599B4 (de) 2011-05-10 2014-10-23 Koenig & Bauer Aktiengesellschaft Feuchtwerk eines Offset-Druckwerks
DE102011075598B4 (de) 2011-05-10 2013-11-07 Koenig & Bauer Aktiengesellschaft Feuchtwerk eines Offset-Druckwerks
CN104364259A (zh) * 2012-03-26 2015-02-18 普罗努塔利亚公司 营养性片段、蛋白质和方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR769361A (fr) * 1934-02-26 1934-08-24 Miehle Printing Press & Mfg Procédé et dispositif d'impression lithographique
DE629700C (de) 1934-01-18 1936-05-11 Interprint G M B H Vorrichtung zum Anfeuchten der nicht druckenden Stellen von Flachdruckplatten in Druckmaschinen
DE2127021A1 (de) 1970-07-23 1972-01-27 VEB Polygraph Leipzig, Kombinat für polygraphische Maschinen und Ausrüstungen, χ 7050 Leipzig Anordnung zur Regulierung der Feuchtigkeitsfilmdicke auf Zylindermantelflächen von Druckmaschinen
DE2658875A1 (de) 1976-12-24 1978-06-29 Koenig & Bauer Ag Feuchtwerk
JPS58168564A (ja) * 1982-03-31 1983-10-04 Mitsubishi Heavy Ind Ltd 湿し装置
JPS6467340A (en) * 1987-09-08 1989-03-14 Toshiba Machine Co Ltd Damping arrangement of printing press
JPH05154981A (ja) 1991-12-09 1993-06-22 Mitsubishi Heavy Ind Ltd 湿し装置
DE19856370A1 (de) 1997-12-18 1999-06-24 Heidelberger Druckmasch Ag Vorrichtung und Verfahren zur Vermeidung von Kondenswasserbildung in Druckmaschinen

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH089226B2 (ja) * 1988-09-02 1996-01-31 株式会社東京機械製作所 輪転印刷機

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE629700C (de) 1934-01-18 1936-05-11 Interprint G M B H Vorrichtung zum Anfeuchten der nicht druckenden Stellen von Flachdruckplatten in Druckmaschinen
FR769361A (fr) * 1934-02-26 1934-08-24 Miehle Printing Press & Mfg Procédé et dispositif d'impression lithographique
DE2127021A1 (de) 1970-07-23 1972-01-27 VEB Polygraph Leipzig, Kombinat für polygraphische Maschinen und Ausrüstungen, χ 7050 Leipzig Anordnung zur Regulierung der Feuchtigkeitsfilmdicke auf Zylindermantelflächen von Druckmaschinen
DE2658875A1 (de) 1976-12-24 1978-06-29 Koenig & Bauer Ag Feuchtwerk
JPS58168564A (ja) * 1982-03-31 1983-10-04 Mitsubishi Heavy Ind Ltd 湿し装置
JPS6467340A (en) * 1987-09-08 1989-03-14 Toshiba Machine Co Ltd Damping arrangement of printing press
JPH05154981A (ja) 1991-12-09 1993-06-22 Mitsubishi Heavy Ind Ltd 湿し装置
DE19856370A1 (de) 1997-12-18 1999-06-24 Heidelberger Druckmasch Ag Vorrichtung und Verfahren zur Vermeidung von Kondenswasserbildung in Druckmaschinen

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 008, no. 005 (M - 267) 11 January 1984 (1984-01-11) *
PATENT ABSTRACTS OF JAPAN vol. 013, no. 265 (M - 839) 19 June 1989 (1989-06-19) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103317827A (zh) * 2012-03-21 2013-09-25 施乐公司 数字平版印刷系统中通过冷凝的润湿液沉积

Also Published As

Publication number Publication date
EP1456031A1 (fr) 2004-09-15
AU2002357975A1 (en) 2003-07-09
DE10162788A1 (de) 2003-07-10

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