EP0876256A2 - Dispositif de mouillage par pulverisation - Google Patents

Dispositif de mouillage par pulverisation

Info

Publication number
EP0876256A2
EP0876256A2 EP97914063A EP97914063A EP0876256A2 EP 0876256 A2 EP0876256 A2 EP 0876256A2 EP 97914063 A EP97914063 A EP 97914063A EP 97914063 A EP97914063 A EP 97914063A EP 0876256 A2 EP0876256 A2 EP 0876256A2
Authority
EP
European Patent Office
Prior art keywords
spray
dampening
cylinder
doctor
rotation
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.)
Granted
Application number
EP97914063A
Other languages
German (de)
English (en)
Other versions
EP0876256B1 (fr
Inventor
Martin Heinz Schoeps
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.)
Koenig and Bauer AG
Original Assignee
Koenig and Bauer Albert AG
Koenig and Bauer 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 Koenig and Bauer Albert AG, Koenig and Bauer AG filed Critical Koenig and Bauer Albert AG
Priority to EP99108946A priority Critical patent/EP0956949A3/fr
Publication of EP0876256A2 publication Critical patent/EP0876256A2/fr
Application granted granted Critical
Publication of EP0876256B1 publication Critical patent/EP0876256B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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 invention relates to a spray dampening unit according to the preamble of claim 1.
  • the invention is based on the object of creating a device for preventing deposits on nozzle outlet openings of spray nozzles.
  • the invention is in the drawing based on two
  • FIG. 1 shows a schematic cross section through a pneumatic doctor device according to the invention
  • Figure 2 shows a schematic cross section through a second embodiment with a multi-stage doctor device.
  • a spray dampening system for moistening objects in particular a clockwise rotating rotation dampening cylinder A, z. B.
  • moist re i bzy l i nde rs 1 consists of a spray bar 2 extending in the axis-parallel direction to the damp re i bzy l i nder 1.
  • the moist rei bzy l i nder 1 which has a metallic surface, can, for. B. in a four-roller spray dampening unit
  • the dampening solution transfer via a dampening roller, a dampening intermediate roller and a dampening roller are connected to a plate cylinder.
  • the spray bar 2 consists of a cross-sectionally U-shaped support 3, which is tenste l lfest mounted on both ends.
  • a first leg 4 receives a number of spaced-apart nozzles 6, preferably flat jet nozzles.
  • Each nozzle 6 has a connection 7 for dampening solution and is connected to a plunger actuated by a solenoid valve, not shown, which controls the supply of dampening solution in cycles.
  • the nozzle 6 has a funnel-shaped nozzle mouthpiece 8, in the interior of which a nozzle insert 9 containing a nozzle bore is fastened.
  • a dampening medium L-F salmon jet 12 that can be emitted from each nozzle 6 onto the lateral surface 11 of the dampened layer 1 is delivered to the spray bar 2 within a dampening solution blasting space 13 that is open in the direction of the lateral surface 11.
  • the Feuchtmi tte l-steel chamber 13 is next to the first leg 4 of the carrier 3 by two the radius of the lateral surface 11 of the damp rei bzy Linders 1 laterally adapted side plates 14 and a lower base plate 16 and an upper cover plate 17 limited.
  • the base plate 16 is attached to the foot piece 18 of the U-shaped support 3.
  • the cover plate 17 is pivotally attached to the end of a second leg 21 of the carrier 3 by means of a hinge 19, so that the U-shaped carrier 3 open at the top can also be covered at the same time.
  • Both the ends 22, 23 of the lower and upper cover 16; 17 can be provided with strip-shaped flow baffles 24; 26 be provided, so that between the upper and lower boundary or wall of the dampening medium jet chamber 13 and the jacket 11 of the dampening coating 1 each an adjustable gap b in the range from 0.5 to 5 mm arises.
  • the pivotable cover plate 17 can be fixed by means of closures (not shown) against fixed stops 27 and by means of a sealing strip 28 can be sealed against the end of the first leg 4 of the carrier 3.
  • a pneumatic rake line 29 Seen in the direction of rotation A of the dampening nozzle 1, in front of the spray bar 2, a pneumatic rake line 29 according to the invention, which extends in the axis-parallel direction of the dampening element 1 and acts on the lateral surface 11, is arranged.
  • the squeegee device 1 extends at least over the bale length of the dampening egg 1.
  • This squeegee device 29 has one or more flat jet nozzles 31 arranged in the axis-parallel direction to the dampening egg 1, which nozzles 31 are permanently connected with compressed air, e.g. B. in the range of 0.1 to 4.5 bar gauge pressure ( Figure 1).
  • the doctor device 29 is in 052 PCI7DE97 / 00075
  • an upstream suction device 33 acting in the axially parallel direction of the moist reie bzyli nders which consists of a suction box which is provided with a connection 35 for a suction Heilque l le.
  • the suction box adjoins the pneumatic squeegee device 29 at the top and is delimited at the bottom by a flow guide plate 39 running parallel to it, which is bent at its end 40 facing the dampening nozzle 1 opposite the direction of rotation A and at a distance b from the lateral surface 11 runs.
  • Both the squeegee device 29 and the suction device 33 can be fastened to the base plate 16 outside the dampening medium jet space 13, which can be reinforced by a carrier 34.
  • the device according to the invention works as follows: While the cylinders of the spray dampening system are running, the fine dampening solution mist of the dampening solution flat jet 12 applied to the dampening device 1 is smoothed by the subsequent dampening means Iwa Izen and applied to the plates of the plate cylinder forwarded. Due to the high machine speeds and the resulting high peripheral speeds of the dampening solution rollers, ink and paper particles are torn off and are transported in the direction of the dampening roller 1 and spray bar 2.
  • the pneumatic doctor device 29 By arranging the pneumatic doctor device 29 in front of the spray bar 2, in particular in connection with the suction device 33, the ink and paper particles 36 entrained by the air stream of the rotating damp rei bzy linders 1 become a wet friction cylinder as a result of the direction axially parallel to the lateral surface 11 1n 1 acting strip-shaped compressed air lock 37 stopped and kept away from the spray dampening system due to the suction.
  • a multi-stage doctor device 38 extending in the axis-parallel direction of the dampening cylinder 1 is arranged (FIG. 2).
  • This rake lei nri direction 38 has several in the direction of rotation A at a distance c, z. B. in a range of 1 to 10 mm, successively arranged doctor blades 41, 42, 43.
  • These squeegees 41 to 43 each consist of a doctor blade, z. B. made of steel or plastic with a thickness of 1 to 10 mm.
  • Spacers 46, 47 are arranged between the doctor blades 43, 42 and spacers 48, 49 are arranged between the doctor blades 42, 41.
  • the doctor blades 41 to 43 and the spacers 46 to 49 are jewei ls by fasteners, for. B. screws connected.
  • Said attachment 46 to 49 located between the squeegees 41 to 43 plus the Fastening elements are repeated at the required intervals in the direction parallel to the axis of the wet tear 1. Between the upper doctor 43 and the lower flow guide 24 there is also a continuous distance with an amount of at least size c.
  • the lower squeegee 41 can have a greater width than the squeegees 42, 43, so that a projecting end 53 by fastening elements, for. B. screws 54 on the base plate 16 or a support 34 of the spray bar 2 is fastened several times.
  • This multistage rake device 38 is expediently opened only in the direction of the dampening zone 1, that is to say it is encapsulated.
  • an air flow which is produced during the running of the spray dampening unit and which is enriched with ink and paper particles 36 is swirled behind the edges 56, 57, 58 of the doctor blades 41 to 43 pointing in the direction of the dampening layer 1 and the particles are deposited between the doctor blades 41 to 43.
  • the edges 56, 57, 58 are arranged at an adjustable distance b from the lateral surface 11.
  • connection 59 for a suction device is provided at the ends of the doctor blades 41 to 43 opposite the cylinder edges 56 to 58 (FIG. 2).
  • Each of the doctor blades 41 to 43 consists of a second one Design variant from a coolable doctor blade.
  • each doctor blade up to the vicinity of its edge 56 to 58 with a cavity in which coolant circulates.

Landscapes

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

Abstract

Un dispositif monté sur un dispositif de mouillage par pulvérisation permet d'éviter la formation de dépôts sur les orifices de sortie de buses. A cet effet, il est prévu, vu dans le sens de rotation du cylindre à pulvériser, devant les buses, un système de racle s'étendant parallèlement à l'axe du cylindre et agissant sur le flux d'air entourant la surface extérieure du cylindre.
EP97914063A 1996-01-24 1997-01-17 Dispositif de mouillage par pulverisation Expired - Lifetime EP0876256B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP99108946A EP0956949A3 (fr) 1996-01-24 1997-01-17 Dispositif de mouillage par pulverisation

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19602408 1996-01-24
DE19602408 1996-01-24
PCT/DE1997/000075 WO1997027052A2 (fr) 1996-01-24 1997-01-17 Dispositif de mouillage par pulverisation

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP99108946A Division EP0956949A3 (fr) 1996-01-24 1997-01-17 Dispositif de mouillage par pulverisation

Publications (2)

Publication Number Publication Date
EP0876256A2 true EP0876256A2 (fr) 1998-11-11
EP0876256B1 EP0876256B1 (fr) 2000-04-19

Family

ID=7783517

Family Applications (2)

Application Number Title Priority Date Filing Date
EP99108946A Withdrawn EP0956949A3 (fr) 1996-01-24 1997-01-17 Dispositif de mouillage par pulverisation
EP97914063A Expired - Lifetime EP0876256B1 (fr) 1996-01-24 1997-01-17 Dispositif de mouillage par pulverisation

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP99108946A Withdrawn EP0956949A3 (fr) 1996-01-24 1997-01-17 Dispositif de mouillage par pulverisation

Country Status (3)

Country Link
EP (2) EP0956949A3 (fr)
DE (1) DE59701465D1 (fr)
WO (1) WO1997027052A2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6152032A (en) * 1998-11-05 2000-11-28 Heidelberger Druckmaschinen Ag Mist containment system for a spray dampener system
SE516747C2 (sv) * 2000-05-17 2002-02-26 Baldwin Jimek Ab Sätt och anordning att hindra igensättning av spraymunstycken och/eller en avskärmningsplatta hos en sprayfuktanordning
SE524552C2 (sv) 2002-05-17 2004-08-24 Baldwin Jimek Ab Metod och anordning för att hålla ett antal spraymunstycken i en tryckpress-spraybom rena
JP5131947B2 (ja) * 2007-09-28 2013-01-30 日本ボールドウィン株式会社 スプレーダンプナ
DE102007052573B4 (de) 2007-11-03 2015-04-09 Manroland Web Systems Gmbh Feuchtwerk
JP2010094928A (ja) * 2008-10-18 2010-04-30 Baldwin Japan Ltd スプレーダンプナ装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE901290C (de) * 1948-10-06 1954-01-11 Ernst Wagner Vorrichtung zum Befeuchten von Druckplatten
US4044674A (en) * 1974-07-24 1977-08-30 Smith R.P.M. Corporation Spray dampening system for high quality offset printing
JPS63158252A (ja) * 1986-12-20 1988-07-01 Kazuo Maruta オフセツト印刷機の湿し方法並びに装置
JPS649737A (en) * 1987-07-03 1989-01-13 Kindaishiya Kk Method for moistening plate surface in wet offset printing
US5040457A (en) * 1989-10-10 1991-08-20 Rockwell International Corporation Printing press dampener
DE4301950A1 (de) * 1993-01-25 1994-07-28 Koenig & Bauer Ag Verfahren und Vorrichtung zum Verhindern eines Niederschlages eines unerwünschten aerosolartigen Mediums in einer Rotationsdruckmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9727052A2 *

Also Published As

Publication number Publication date
EP0876256B1 (fr) 2000-04-19
WO1997027052A3 (fr) 1997-10-23
WO1997027052A2 (fr) 1997-07-31
DE59701465D1 (de) 2000-05-25
EP0956949A2 (fr) 1999-11-17
EP0956949A3 (fr) 1999-12-29

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