EP1199166B1 - Farbwerk in einer Druckmaschine - Google Patents

Farbwerk in einer Druckmaschine Download PDF

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Publication number
EP1199166B1
EP1199166B1 EP01120743A EP01120743A EP1199166B1 EP 1199166 B1 EP1199166 B1 EP 1199166B1 EP 01120743 A EP01120743 A EP 01120743A EP 01120743 A EP01120743 A EP 01120743A EP 1199166 B1 EP1199166 B1 EP 1199166B1
Authority
EP
European Patent Office
Prior art keywords
roller
metering
metering element
inking unit
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
EP01120743A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1199166A1 (de
Inventor
Wolfgang Schönberger
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 EP1199166A1 publication Critical patent/EP1199166A1/de
Application granted granted Critical
Publication of EP1199166B1 publication Critical patent/EP1199166B1/de
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
    • B41F31/00—Inking arrangements or devices
    • B41F31/20—Ink-removing or collecting devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • 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
    • B41F31/06—Troughs or like reservoirs with immersed or partly immersed, rollers or cylinders

Definitions

  • the invention relates to an inking unit in a printing machine, comprising a Farbdosier adopted with at least one metering element which abuts in a contact position on a roller which is an inking roller or is applied to such, according to the preamble of claim 1.
  • the metering element of which is designed as a dosing strip rests against an inking roller, so that the inking unit is extremely short.
  • the obstructions caused by the dirt particles to be avoided by the metering strip is arranged swinging about an axis.
  • the axis is in one of the embodiments shown in the center of the inking roller and in another of the embodiments in the center of a rounding of a wiping edge of the dosing, so that the latter can not be lifted from the inking roller due to their vibration in any of the embodiments.
  • the thickness of a dosed by means of the dosing on the inking roller ink film can be adjusted by more or less pressing the dosing to the inking roller. Unfavorable in this inking is that can not be replaced because of the fixed axis of the dosing of this very stubbornly stuck dirt particles.
  • a strong contact pressure of the dosing to the inking roller is required and quickly wears the dosing due to the strong contact pressure.
  • the metering blade of which resting against a metering roller is set in ultrasonic oscillations.
  • the metering blade is a component of a chamber doctor blade, in the chamber of which the printing ink is under an overpressure which holds the metering doctor blade on the metering roller.
  • the invention has for its object to provide a short or extremely short inking, are excluded in which blockages in the dosing and in which the wear of the dosing is minimized.
  • the inking unit according to the invention in a printing press, with a Farbdosier adopted with at least one metering element which abuts in a contact position on a roller which is an inking roller or is applied to such, is characterized in that the metering element by means of this associated oscillating device between the contact position and a distance position is mounted back and forth swinging.
  • An advantage of the inking unit according to the invention is that there is a gap between the metering element and a circumferential surface of the roller each time the metering element has reached the distance position in the course of the vibration imposed by the oscillating device.
  • the gap is larger than the dirt particles in the ink, so that they can pass without getting stuck through the gap.
  • the discontinuous contact of the metering element during metering on the roller is also favorable with regard to a prolonged service life of the metering element,
  • the dosing element is assigned an electromagnetic oscillating drive, which is likewise a component of the oscillating device.
  • the frequency of the oscillation of the metering element or the period number of the Oscillation per one revolution of the roller and thus the number and the distance to each other are changed by color lines generated on the roller.
  • the distance corresponding position amplitude of the vibration of the metering element can be varied, so that the dosed with the metering ink at a small amplitude low elevations and high amplitude surveys, z. B. color lines, forms on the peripheral surface of the roller.
  • An advantage of the metering quantity control taking place via the frequency and / or amplitude is also that the contact pressure of the metering element on the roller can be selected independently of the set metering quantity.
  • the contact pressure of the metering element on the roller can be selected independently of the set metering quantity. In order to reduce the film layer thickness of the color lines generated with the metering on the roller, no increase in the contact pressure of the metering element in the contact position is required to the roller. In other words, decreasing the metering amount does not increase the abrasion of the roller and the metering member depending on the contact pressure.
  • the contact pressure can be the same and comparatively low for each set dosing quantity.
  • a hydraulic or pneumatic or piezoelectric vibration drive can be provided instead of the electromagnetic vibration drive.
  • the spring in the more worn and shortened state the spring in about the same force against the roller, as in the less worn state of the metering.
  • the spring characteristic of the spring is chosen so that the Shortening of the dosing corresponding change in the spring travel can not adversely affect.
  • the assignment of the spring to the dosing allows its automatic adjustment in case of wear of the dosing even in those preferred development in which the dosing has a relative to the roller in approximately radial direction of vibration.
  • the spring adjusts the wearing metering element in just this approximately radial direction of vibration.
  • the metering element has a work area terminating in the cutting edge, the laminar or cross-sectional thickness of which is constant.
  • the cross-sectional thickness is measured perpendicular to the adjustment direction of the metering element, which corresponds to the direction of vibration, and perpendicular to a rotation axis of the roller. Along the adjustment direction, the cross-sectional thickness does not change within the working range.
  • the cross-sectional width of the blade thickness of the metering blade corresponds.
  • the wear-related shortening in the metering element according to the invention does not cause any widening of the cutting edge which reduces the metering accuracy.
  • the inking device is assigned an ink supply device which, viewed in the direction of rotation of the roller, is arranged upstream of the metering element and designed as a feed roller.
  • the printing ink which is also understood as a paint
  • the oscillating metering element on the applied paint film whose thickness is reduced to a required level and structured the film surface. Due to the structuring of the color film, it is periodically reduced or interrupted in its thickness.
  • the color pattern produced on the roller as a result of the structuring consists of the evenly distributed color lines or piles which, in the case of the discontinuous color film, are completely separate from one another on the roll surface or, in the case of the reduced color film, can form a color profile with a closed color layer.
  • a color pattern which consists of a plurality of juxtaposed and extending in the circumferential direction of the roller rows of color piles
  • advantageous development of the roller are associated with a plurality of metering elements which are formed and arranged according to the previously described metering element.
  • the metering elements are arranged close to one another in a row which is axis-parallel to the roller and extends over the area to be inked, and together form a metering device.
  • the dosing are independent of each other and stored in the change from the roller liftable.
  • those within the row forming even-numbered positions of dosing elements of a first dosing comb, and the dosing elements sitting within the row on odd-numbered positions form tines of a second dosing comb.
  • the Dosier tanninmme perform mutually phase-oscillations between the contact position and the distance position, so that the sitting on the even-numbered positions metering are always placed in alternation with the sitting on the odd-numbered positions metering against the roller.
  • the inking unit is preferably designed as a so-called zoneless inking unit for uniform printing of the printing ink over the printing width.
  • a color zone profile is characterized by an uneven course across the print width.
  • each of the dosing is the area coverage and color requirements of a printing plate in the ink zone, which is associated with the respective metering element, individually controlled.
  • the metering elements composed of the dosing of the zoneless inking unit described in the present invention over the printing width across a uniform color pattern is produced on the roller.
  • This color pattern can extend over the print width without interruption as one of the color lines already mentioned several times.
  • the height of the color line ie the layer thickness, is constant over the entire printing width.
  • the color pattern can also consist of the already mentioned color piles, which are applied in a row extending over the printing width and at a distance from one another onto the roller.
  • the row of color patches can also be considered as a uniformly spaced color line. All color piles have the same height, ie layer thickness.
  • Other color patterns which are uniform over the printing width, ie periodically repeating, produced on the roller by the metering device also do not contradict a zonal design of the inking unit in any way.
  • FIG. 1 is a printing machine 1, in particular a sheet-fed rotary offset printing machine, with an impression cylinder 2 for guiding a printing substrate 3, a printing form cylinder 4, a blanket cylinder 5 for transferring a print image from the printing form cylinder 4 on the substrate 3 and an inking unit 6 for coloring the printing plate cylinder 4 ,
  • the inking unit 6 comprises a roller 7, which rolls as an inking roller angle synchronously on the printing form cylinder 4 and has a rubber-elastic or elastomeric peripheral surface which is smooth-surfaced.
  • the diameters of the roller 7 and the plate cylinder 4 are the same size.
  • the roller 7 is associated with a ink supply device 8, which applies a full-surface, ie unpatterned ink film 9 on the roller 7 and the one from the on the roller. 7 co-rolling roller 10 and a paint trough 11, in which the roller 10 is arranged as a fountain roller exists.
  • a Farbdosier spur 12 for converting the ink film 9 in a uniform color pattern 13 is seen in the direction of rotation of the roller 7 downstream of the ink supply device 8 and the printing form cylinder 4 upstream.
  • the ink metering 12 are downstream smoothing rollers 14, 15, 16, which roll exclusively on the roller 7 and the color pattern 13 to a full-surface, d.
  • the ink film 17 is split between the roller 7 and the printing form cylinder 4 and partially transferred to the printing form cylinder 4.
  • FIG. 2 is a acting as a metering dosing 18 of the ink metering device 12 in a distance position 18.1 and a contact position 18.2 shown relative to the roller 7.
  • the dosing element 18 oscillates during dosing along a linear oscillation direction 19 between the distance position 18.1 and the contact position 18.2 with a frequency adjustable in the range from 200 Hz to 10 kHz.
  • the metering element 18 periodically lifts from the roller 7 by a preferably in the range of 20 to 40 microns lying passage height 20, which is in any case less than 100 microns.
  • the distance position 18.1, in which the metering element 18 reaches the passage height 20, and the contact position 18.2 are the reversal points of the oscillation of the metering element 17.
  • the passage height 20 is much larger than dirt particles 21, 22 which form in a color film 9 Are printing ink, so that the dirt particles 21, 22 a certain through the passage height 20 metering gap between the metering element 18 and the peripheral surface of the roller 7, without getting stuck in the metering gap, can happen.
  • the color pattern 13 consists of color elevations 23, 24, which extend as to the roller 7 axially parallel color lines on the peripheral surface of the roller 7 and each offset by an arc length 25 each.
  • the arc length 25, which is the same size between all adjacent color elevations 23, 24 on the roller 7, is proportional to the frequency of the oscillation of the metering element 18 and can be in the range from 1 mm to 20 mm.
  • the peripheral surface of the roller 7 may have a microstructure, e.g. Example, a surface roughness produced by sandblasting or produced by engraving cup grid, which leaves a very thin lubricating film 26 between the roller 7 and the metering element 18 when located in the contact position 18.2 metering element 18.
  • the lubricating film 26 prevents premature abrasive wear of the metering element 18 and is quantitatively smaller than the amount of ink required to print the lowest desired color density, e.g. B. a Volltonêt of 0.5, is required.
  • the layer thickness of the ink film 17 can be varied via an adjustment of the frequency of the vibration of the metering element 18 and / or an adjustment of the distance position 18.1 and thus the passage height 20.
  • the arc length 25, d. H. the distance of the color bumps 23, 24 to each other is proportional to the frequency of the vibration representing a first adjustment parameter. The higher the frequency, the shorter the arc length 25 and the greater the layer thickness of the ink film 17 and thus also the amount of ink transferred to the printing form cylinder 4.
  • the oscillation direction 19 and a tangential line 28 of the roller 7 intersect at a contact point 29 in which the metering element 18 touches the roller 7.
  • the metering element 18 can also be referred to as a so-called negative doctor blade.
  • the oscillating device 31 which periodically oscillates the metering element 18 from the distance position 18.1 into the contact position 18.2 and back, includes a vibratory drive 32 for exciting the oscillation of the metering element 18 and a guide 33 which predetermines the oscillation direction 19 for the metering element 18.
  • the oscillating drive 32 is designed as a linear electric motor and consists of a stator 34 and a rotor 35.
  • the sleeve-shaped stator 34 comprises a magnet 36, for.
  • the rotor 35 consists of a sleeve 38 to which the metering element 18 is attached and which carries an electrical coil 39 which is cast into the sleeve 38 or wound on this is.
  • the sleeve 38 is slidably mounted in the vibration direction 19 on a guide pin 40 of the stator 34, so that the sleeve 38 together with the guide pin 40, the guide 33 forms.
  • a helical spring 41 prestressed between the stator 34 and the rotor 35 by a compressive load and plugged onto the guide pin 40 is likewise a component of the oscillating device 31.
  • the oscillating drive 32 is a path-controlled electric linear drive.
  • the current actual position of the metering element 18 can be determined by means of a sensor or by evaluating the motor currents of the linear drive at each contact of the metering element 18 with the roller 7 and starting from the actual position, a compensation of the wear of the metering element 18 and the Out of roundness of the roller 7 done by a the wear and the irregularities considering new target position of the metering element 18 is specified.
  • the metering element 18 has a terminating in a cutting edge 43 working area 44 with a cross-sectional thickness 45 which always remains constant with wear-decreasing length of the working area 44, so that the cutting edge 43 is not widened and the dosing accuracy is not affected by the wear of the metering element 18 ,
  • the dosing element 18 is designed as a so-called thin-section doctor blade, the designations lamella thickness instead of cross-sectional thickness 45 and chamfer instead of cutting edge 43 are also used.
  • the metering element 18 is shown in less worn condition.
  • the shows FIG. 3b the metering element 18 in a more worn condition, in which the working area 44 is shortened due to its abrasion by the roller 7.
  • Proportional to the increasing shortening of the metering element 18 increases a distance traveled between the positions 18.1 and 18.2 travel of the spring 41, so that the shortening is compensated.
  • the increase in the spring travel is so low and the spring characteristic of the spring 41 is selected so that the effected by the spring 41 contact pressure of the metering element 18 in the contact position 18.2 against the roller 7 and the passage height 20 in the distance position 18.1 is not in a dosing accuracy significantly affecting dimensions and remain essentially preserved.
  • the acting as a plunger coil 39 is formed so that they regardless of their occupied in the contact position 18.2 depending on the shortening of the metering element 18 relative to the stator 34 at a same electrical pulse through the control device 42 a same impulse and thus always the same passage height 20 generated.
  • the distance position 18.1 and thus the passage height 20 can be adjusted very precisely by means of an adjusting device 46 by the oscillating device 31 is adjustable by means of the adjusting device 46 to the roller 7 or away from it.
  • the adjusting device 46 is designed as a screw connecting the stator 34 to a frame of the printing machine 1, by the rotation of the distance of the oscillating means 31 relative to the roller 7 is adjustable.
  • the spring 41 loads the metering element 18 or presses against the roller 7 when the metering element 18 is in the contact position 18.2.
  • the spring 41 compensates not only the shortening of the metering element 18 but also occurring non-circularity of the roller 7. Likewise caused by operational temperature variations of the roller 7 diameter changes of the roller 7 are compensated by the spring 41.
  • the metering element 18, z. B. in the form of a metering strip or a metering meter, as the only metering of the ink metering device 12 over the entire inking area of the roller 7 away axially parallel to this extends.
  • the metering element 18 may be flexible, flexible in this case, so that the metering element 18 over its length on a due to the differences in diameter is not ideal straight mantle line (generatrix) of the roller 7, this generatrix following snugly.
  • the spring 41 act on the metering element 18, but over the length of the metering element 18, a plurality of such springs are distributed over the metering element 18.
  • the ink metering device 12 comprises not only the metering element 18 and the oscillating device 31 but further such metering elements 18 ', 18 ", 18"' and their associated oscillating devices 31 ', 31 "and is in the FIG. 4 shown. In it, the diameter differences are greatly exaggerated for clarity.
  • FIGS. 5 a to c show on the basis of successively passed oscillation phases on the sequence of the staggered movement of the metering 18, 18 ', 18 ", 18"' of the segmented ink metering device 12 FIG. 4 ,
  • FIG. 5c - take the dosing 18, 18 ', 18 “, 18”' with respect to the first phase of oscillation reversed swinging position, with sitting on the even-numbered place numbers dosing 18 ', 18 “' in their respective investment position 18.2 and sitting on the odd numbered seat numbers Dosing elements 18, 18 "in their respective distance position 18.1 relative to the roller 7 are.
  • the transition from the second to the third oscillation phase takes place by the oscillation of the dosing elements seated on the odd-numbered location numbers During the third oscillation phase, a color line is produced on the roller 7, the color elevations 24, 24 ', 24 "of which are flush with the color elevations 23, 23', 23" of the color line generated in the first oscillation phase are offset.
  • the period of the second oscillation phase is equal to zero, ie the dosing elements 18, 18 "shortly before or at the time of placing the dosing 18 ', 18"' on the roller 7 stand out from the latter, deviating from the FIG. 6 and resulting from the described phases of vibration color pattern 13, a checkerboard-like color pattern without color-free lines between the color lines.
  • an ink dosing device 47 which can be used in place of the ink dosing device 12 is shown together with a paint supply device 48 which can be used instead of the ink supply device 8.
  • a paint supply device 48 which can be used instead of the ink supply device 8.
  • the same reference numerals are used for functionally identical parts already used in the description of the devices 8 and 12. Design deviations of these functionally identical parts of the devices 47 and 48 from the corresponding parts of the devices 8 and 12 will be explained in detail below.
  • the oscillating drive 32 of the ink metering device 47 is designed as an electric motor with a rotating motor shaft 49. This is drivingly connected via a propeller shaft 50 with an eccentric pin 51 which is rotatably mounted in a carrier 53 by means of roller bearings in a support 53 via its paragraph 51.1 in a free oscillating element 52 and via its paragraph 51.2 an eccentricity e having paragraph.
  • the carrier 53 is guided along the direction of oscillation 19 by the guide 33, which is arranged on a frame 55 which is movably mounted on and off the roller 7 for attaching and removing the ink supply device 48 and on the ink supply device 48.
  • the latter is designed as a chambered doctor blade, which comprises the metering element 18 attached to the second support 53 as a working or metering doctor blade and a negatively oriented closing blade 54 and is connected to an ink supply pump, not shown.
  • the spring 41 is biased, which presses the carrier 53 and with this the metering element 18 against the roller 7.
  • the arc length 25 is adjustable by a change made to the control device 42 change in the rotational speed of the oscillating drive 32. With a reduction in the speed, the frequency of the oscillation of the metering element 18 is reduced and with an increase in the speed increases the frequency and thus the metered amount of ink. However, this can also be increased and reduced by amplitude adjustments of the oscillation.
  • In the ink metering device 47 can be z. B. the eccentricity e and / or the bias of the spring 41 can be adjusted.
  • control device 42 can drive the oscillation drive 32 in such a way that it alternately rotates forward and backward over a certain angle of rotation.
  • the size of the rotation angle is in this case proportional to the amplitude, ie the distance position 18.2.
  • the vibration drive rotates continuously in one and the same direction of rotation.
  • FIG. 8 a modified roller configuration is shown, which differs from that of the FIG. 1 only differs in that the roller 7, on which the color pattern 13 is generated, not on the printing form cylinder 4 but on a trained as an inking roller roller 56 unrolls, which in turn rolls on the printing form cylinder 4.
  • the roller 56 whose diameter corresponds to those of the roller 7 and the plate cylinder 4, has an elastomeric peripheral surface.
  • the printing form cylinder 4 and the roller 56 rotated in synchronism with each other at the same speed while rolling on each other.
  • the roller 7 preferably has a smooth surface or optionally screened with wells, hard and z. B. ceramic peripheral surface.
  • the rollers 10, 14, 15, 16 have rubber-elastic or elastomeric circumferential surfaces.
  • the ink feed device 48 can also be used instead of the ink feed device 8, and the ink metering device 47 can also be used instead of the ink metering device 12.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Coating Apparatus (AREA)
  • Ink Jet (AREA)
EP01120743A 2000-10-20 2001-09-06 Farbwerk in einer Druckmaschine Expired - Lifetime EP1199166B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10052011A DE10052011A1 (de) 2000-10-20 2000-10-20 Farbwerk in einer Druckmaschine
DE10052011 2000-10-20

Publications (2)

Publication Number Publication Date
EP1199166A1 EP1199166A1 (de) 2002-04-24
EP1199166B1 true EP1199166B1 (de) 2010-11-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP01120743A Expired - Lifetime EP1199166B1 (de) 2000-10-20 2001-09-06 Farbwerk in einer Druckmaschine

Country Status (8)

Country Link
US (1) US20020162466A1 (zh)
EP (1) EP1199166B1 (zh)
JP (1) JP2002144532A (zh)
CN (1) CN1251865C (zh)
AT (1) ATE487601T1 (zh)
CZ (1) CZ297965B6 (zh)
DE (2) DE10052011A1 (zh)
HK (1) HK1046882B (zh)

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DE102006049619A1 (de) * 2006-10-20 2008-05-15 Man Roland Druckmaschinen Ag Verfahren zum Betreiben eines Farbwerks einer Druckmaschine
JP4995705B2 (ja) * 2006-12-05 2012-08-08 ハイデルベルガー ドルツクマシーネン アクチエンゲゼルシヤフト アニロックス式印刷ユニットを作動させる方法
JP5020015B2 (ja) * 2007-09-28 2012-09-05 富士フイルム株式会社 液体塗布装置及びインクジェット記録装置
DE102011100284A1 (de) * 2010-05-27 2011-12-01 Heidelberger Druckmaschinen Ag Einrichtung zum Dosieren einer drucktechnischen Beschichtungsflüssigkeit auf einer Walze
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DE102012012089A1 (de) * 2011-07-06 2013-01-10 Heidelberger Druckmaschinen Ag Verfahren zum Betreiben eines Anilox-Druckwerksund Druckmaschine mit einem Anilox-Druckwerk
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JP2002144532A (ja) 2002-05-21
CN1251865C (zh) 2006-04-19
DE50115702D1 (de) 2010-12-23
DE10052011A1 (de) 2002-04-25
EP1199166A1 (de) 2002-04-24
CZ20012829A3 (cs) 2002-06-12
HK1046882B (zh) 2006-09-29
CZ297965B6 (cs) 2007-05-09
CN1349889A (zh) 2002-05-22
HK1046882A1 (en) 2003-01-30
ATE487601T1 (de) 2010-11-15
US20020162466A1 (en) 2002-11-07

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