EP1036657B1 - Dispositif de mouillage pour une machine à imprimer - Google Patents

Dispositif de mouillage pour une machine à imprimer Download PDF

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Publication number
EP1036657B1
EP1036657B1 EP00104434A EP00104434A EP1036657B1 EP 1036657 B1 EP1036657 B1 EP 1036657B1 EP 00104434 A EP00104434 A EP 00104434A EP 00104434 A EP00104434 A EP 00104434A EP 1036657 B1 EP1036657 B1 EP 1036657B1
Authority
EP
European Patent Office
Prior art keywords
roller
moistening unit
gap
dampening
force
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
EP00104434A
Other languages
German (de)
English (en)
Other versions
EP1036657A3 (fr
EP1036657A2 (fr
Inventor
Peter Heiler
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 EP1036657A2 publication Critical patent/EP1036657A2/fr
Publication of EP1036657A3 publication Critical patent/EP1036657A3/fr
Application granted granted Critical
Publication of EP1036657B1 publication Critical patent/EP1036657B1/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
    • B41F7/26—Damping devices using transfer rollers
    • 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
    • B41F7/40—Devices for tripping or lifting damping rollers; Supporting, adjusting, or removing arrangements therefor

Definitions

  • the invention relates to a dampening system for a printing press.
  • CH 509 159 a dampening system is also described, in which an intermediate roller in a lever is mounted so that the intermediate roller to and from this transfer and Rubbing roller is on and off.
  • the transfer and friction roller lies on an applicator roller which drives an ink-accepting friction roller via the circumferential friction, the one has copper outer surface.
  • the invention has for its object to provide a further dampening system.
  • the task is performed by a dampening system with the features of claim 1 solved.
  • the dampening system according to the invention for a printing press consists of a first and a second roller, which together form a slip gap, and wherein an axis of rotation about which the first roller contacts the second roller is pivotally mounted, lies on a line which passes through a central axis of the first Roller and substantially parallel to one running through the slip gap Tangential line runs.
  • the first roller is on Lift mechanism in the form of a spring for storing the first roller around the axis of rotation assigned to the second roller pivoting force.
  • the advantage of the dampening system according to the invention is that one in the slip gap shear force occurring does not force the first roller from or to the second roller second roller can cause excessive torque. As a result, they remain Roller pressure in the slip gap and the dampening solution film conveyed by it or preferably ink-fountain solution emulsion film constant.
  • the dampening system according to the invention is very good as an emulsion film dampening system for the processing of an alcohol-free dampening solution, which in turn is ecological is advantageous.
  • emulsion film dampening has a greater shear force than that of the Shear of a color-free dampening solution film in a so-called alcohol dampening system.
  • the high shear forces caused those known from the prior art Emulsion dampening systems constructive and functional restrictions. In contrast there are no such restrictions in the dampening system according to the invention available.
  • a printing machine 1 is shown in detail in FIG.
  • the detail shows a printing form cylinder 2, an inking unit 3 and a dampening unit 4 of the printing machine 1, which works with an alcohol-free dampening solution and is designed as a so-called direct film or emulsion dampening unit , which are not shown and together with the printing form cylinder 2 form an offset printing unit.
  • the dampening unit 4 consists of a first roller 6 arranged in a trough-shaped fountain solution container 5 as an immersion roller, a second roller 7 lying on the first roller 6 as a transfer roller in rolling contact, and a third roller lying on the second roller 7 as an axially oscillating friction roller in rolling contact Roller 8, one on the third roller 8 and the printing form cylinder 2 as an application roller in roller contact, and a fourth roller 9, which acts as a metering roller exclusively on the first roller 6 in roller contact.
  • Each of the shortest transport path of the dampening solution from the dampening solution tank 5 for the printing form cylinder 2 forming rollers 6 to 9 and also the fifth roller 10 is provided on the circumference with a color-friendly coating B 6 to B 10 and leads to an ink-fountain solution emulsion on its peripheral surface coated in this way.
  • the coatings B 7 , B 9 and B 10 of the rollers 7, 9 and 10 are soft rubber coatings and the coatings B 6 and B 8 of the rollers 6 and 8 are hard rubber or plastic coatings and consist, for. B. made of hard nylon (Rilsan).
  • the rollers 6 and 10 are rotatably mounted in a common first carrier 11, which around a arranged on a frame 12 first pivot bearing 13 with a Axis of rotation 14 is pivotable.
  • the first carrier 11 consists of two bearing plates, between which bales of rollers 6 and 10 are arranged.
  • adjusting device 15 is the pressure between the rollers 6 and 10 adjustable by turning a setting thread 16, for. B. a screw that Adjustment device 14 an axle 17 of the fifth roller 10 depending on the direction of rotation Adjustment thread 16 to the first roller 6 and is adjustable away from this.
  • a second bracket 20 is pivotally mounted in which the fourth Roller 9 is rotatably mounted.
  • An actuator 21 engages on the second carrier 20 optional turning on and off of the fourth roller 9 to and from the printing form cylinder 2.
  • the actuator 21 is a pneumatic and double acting - d. H. by Pressurized fluid supply both retractable and extendable - working cylinder; which on Frame 12 and its piston rod on the second carrier 20 is articulated.
  • An electric motor 22 used as a main motor of the printing press 1 rotates the printing form cylinder 2 and the rollers 8 and 9 with a circumferential surface speed v 8 that is essentially the same as each other.
  • the motor 22 is connected to the printing form cylinder 2 and the third roller 8 by means of schematically illustrated gear transmissions 23 and 24.
  • the fourth roller 9 is rotated by the third roller 8 with the friction thereof.
  • the second motor 25 is connected in terms of drive to the first roller 6 via an exclusively torque-transmitting clutch 18 and the fifth roller 10 is rotated by the first roller 6 via friction.
  • FIG. 1 it is symbolically shown by rotation arrows accordingly selected that a circumferential surface speed v 7 of the second roller 7 is smaller than the circumferential surface speed v 8 , but larger than the circumferential surface speed v 6
  • a preloaded energy or force store 29 in the form of a spring 29 which can be subjected to pressure and is helically wound acts on the first carrier 11, so that the latter is pivoted counter-clockwise with respect to FIG. 1 about the axis of rotation 14.
  • the energy accumulator 29 holds the first roller 6 in elastic contact with the second roller 7.
  • the width of the press strip within the nip N 6.7 between the rollers 6 and 7 is determined by a normal force F N, 6.7 applied by the energy accumulator 29 - see FIG. 2.
  • the energy accumulator 29 presses the first roller 6 against the second roller 7.
  • the wetted peripheral surface of the second roller 7 forms a stop for the first roller 6. Other stops for determining the position of the roller 6 are not necessary.
  • the roller gap N 6.7 is a so-called slip gap due to the difference between the peripheral surface speeds v 7 and v 8 and a roller gap N 7.8 between the rollers 7 and 8.
  • the liquid transported through the roller nips N 6.7 and N 7.8 is subject to more than one splitting, such as the ink-fountain solution emulsion even in a slip-free nip, but also in shear.
  • FIG. 2 shows that a force action line k 6.7 corresponds to the normal force F N, 6.7 to a center point of the rolls 6 and 7 and a force action line k 7.8 to the normal force F N7.8 corresponds to a center point of the rolls 7 and 8
  • the arrangement of the axis of rotation 14 of the first carrier 11 on a line L running through a central axis M of the first roller 6 and parallel to the tangential line t 6.7 and perpendicular to the force action line k 6.7 or center point of the rollers 6 and 7 ensures that the shear force F S, 6, 7 can not exert any torque on the first carrier 11 which impairs the placement of the first roller 6 against the second roller 7, ie no torque pushing the first roller 6 towards the second roller 7 or pushing it away from the second roller 7 , With any changes in the size of the shear force F S, 6.7 , z. B. caused by changes in one of the circumferential surface speeds v 6 or v 7 of the rollers 6 and 7, the normal force F N, 6.7 resulting from the pretensioning of the energy accumulator 29 and thus the pressure set between the rollers 6 and 7 remain constant.
  • the axis of rotation 14 is within a wedge-shaped tolerance range 30 surrounding the line L is arranged.
  • the position of tolerance limits 31 and 32 on both sides becomes of the tolerance range 30 of an angle ⁇ between the line L and the respective Tolerance limit 31 or 32 defined.
  • the angle ⁇ is less than or equal to 15 °.
  • FIG. 4 shows a possible variant for introducing a driving force F A that generates the speed difference in the nip N 6.7 .
  • the driving force F A does not transmit a torque which pivots the first roller 6 about the axis of rotation 14 and thereby adversely affects the constancy of the pressure in the roller gap N 6, 7 to the first carrier 11.
  • the clutch 18 connects a shaft 36 rotated by the motor 25, for example a motor shaft of the motor 25, to a pin-shaped roller axis 37 of the first roller 6 which is coaxial to the shaft 36.
  • the clutch 18 is designed as a sleeve clutch and consists of two permanently connected clutch halves , namely a gear 26 which is seated in a rotationally fixed manner on the shaft 36 and a gear 27 which is seated in a rotationally fixed manner on the roller axis 37.
  • the gears 26 and 27 are enclosed by a flexible sleeve 28 which has two toothings on the inside, in which the gears 26 and 27 engage.
  • a flexible shaft, a double cardan joint, a curved tooth coupling, a parallel crank coupling or another compensating coupling to compensate for inclination and / or misalignment deviations for driving connection of the motor 25 to the first roller 6 can also be used.
  • a central axis M of the first roller 6 is predetermined by the roller axis 37, around which axis the first roller 6 rotates.
  • a brake can also be arranged to brake the rotation of the roller 6 and to generate the slip in the nips N 6.7 and N 7.8 .
  • the brake would have to be arranged stationary on the frame 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Claims (12)

  1. Dispositif de mouillage (4) pour une machine à imprimer (1), lequel dispositif de mouillage se compose d'un premier cylindre (6) et d'un deuxième cylindre (7) qui, ensemble, forment un intervalle de glissement (N6,7), où un axe de rotation (14), autour duquel le premier cylindre (6) est monté de façon à pouvoir pivoter contre le deuxième cylindre (7), se trouva sur une ligne (L) qui traverse un plan médian (M) du premier cylindre (6) et s'étend pratiquement de façon parallèle à une ligne tangentielle (t6,7) s'étendant à travers l'intervalle de glissement (N6,7), et dans lequel un accumulateur de force (29), sous la forme d'un ressort, est associé au premier cylindre (6), pour l'accumulation d'une force de réglage faisant pivoter le premier cylindre (6) autour de l'axe de rotation (14), contre le deuxième cylindre (7).
  2. Dispositif de mouillage selon la revendication 1, caractérisé en ce que le deuxième cylindre (7) est contigu à un troisième cylindre (8) et forme, avec celui-ci, un écartement des cylindres (N7,8).
  3. Dispositif de mouillage selon la revendication 2, caractérisé en ce que l'écartement des cylindres (N7,8) est un intervalle de glissement.
  4. Dispositif de mouillage selon l'une des revendications 1 à 3, caractérisé en ce que le premier cylindre (6) et le deuxième cylindre (7) présentent respectivement, côté circonférence, un revêtement (B6, B7) de couleur agréable.
  5. Dispositif de mouillage selon la revendication 4, caractérisé en ce que les revêtements (B6, B7) sont en caoutchouc ou en matière plastique.
  6. Dispositif de mouillage selon l'une des revendications 1 à 5, caractérisé en ce que le premier cylindre (6) est monté en rotation sur un support (11), pour le pivotement du premier cylindre (6) autour de l'axe de rotation (14), et le support (11) est relié à un bâti (12) de la machine à imprimer (1), par un palier articulé (13) déterminant l'axe de rotation (14).
  7. Dispositif de mouillage selon la revendication 6, caractérisé en ce qu'un moteur (25) est disposé sur le bâti (12), pour l'entraínement rotatif du premier cylindre, et est relié au premier cylindre (6), pour l'entraínement, par un accouplement (18).
  8. Dispositif de mouillage selon l'une des revendications 1 à 7, caractérisé en ce que le premier cylindre (6) est un cylindre plongeur,
  9. Dispositif de mouillage selon l'une des revendications 2 à 8, caractérisé en ce que le troisième cylindre (8) est un rouleau distributeur changeant.
  10. Dispositif de mouillage selon l'une des revendications 2 à 9, caractérisé en ce que le troisième cylindre (8) est contigu à un quatrième cylindre (9).
  11. Dispositif de mouillage selon la revendication 10, caractérisé en ce que le quatrième cylindre (9) est un rouleau encreur contigu à un cylindre de formes d'impression (2).
  12. Machine à imprimer (1) comprenant un dispositif de mouillage (4) configuré selon l'une des revendications 1 à 11.
EP00104434A 1999-03-17 2000-03-03 Dispositif de mouillage pour une machine à imprimer Expired - Lifetime EP1036657B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19911783 1999-03-17
DE19911783 1999-03-17

Publications (3)

Publication Number Publication Date
EP1036657A2 EP1036657A2 (fr) 2000-09-20
EP1036657A3 EP1036657A3 (fr) 2001-03-28
EP1036657B1 true EP1036657B1 (fr) 2003-10-01

Family

ID=7901222

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00104434A Expired - Lifetime EP1036657B1 (fr) 1999-03-17 2000-03-03 Dispositif de mouillage pour une machine à imprimer

Country Status (7)

Country Link
US (2) US6546860B1 (fr)
EP (1) EP1036657B1 (fr)
JP (2) JP2000272082A (fr)
CN (1) CN1165419C (fr)
AT (1) ATE251035T1 (fr)
DE (2) DE10008488A1 (fr)
HK (1) HK1029308A1 (fr)

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EP1176009B1 (fr) * 2000-06-30 2009-08-05 Komori Corporation Commande pour le dispositif encreur d'une machine d'impression
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Also Published As

Publication number Publication date
HK1029308A1 (en) 2001-03-30
EP1036657A3 (fr) 2001-03-28
CN1267597A (zh) 2000-09-27
US6546860B1 (en) 2003-04-15
ATE251035T1 (de) 2003-10-15
JP2000272083A (ja) 2000-10-03
JP2000272082A (ja) 2000-10-03
US6354202B1 (en) 2002-03-12
DE10008488A1 (de) 2000-09-21
CN1165419C (zh) 2004-09-08
DE50003870D1 (de) 2003-11-06
EP1036657A2 (fr) 2000-09-20

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