EP0190600A2 - Dispositif de dosage d'encre pour machines à imprimer - Google Patents

Dispositif de dosage d'encre pour machines à imprimer Download PDF

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Publication number
EP0190600A2
EP0190600A2 EP86100744A EP86100744A EP0190600A2 EP 0190600 A2 EP0190600 A2 EP 0190600A2 EP 86100744 A EP86100744 A EP 86100744A EP 86100744 A EP86100744 A EP 86100744A EP 0190600 A2 EP0190600 A2 EP 0190600A2
Authority
EP
European Patent Office
Prior art keywords
slide
tip
metering
paint
edge
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
EP86100744A
Other languages
German (de)
English (en)
Other versions
EP0190600B1 (fr
EP0190600A3 (en
Inventor
Peter Hummel
Joachim Steuer
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.)
Manroland AG
Original Assignee
MAN Roland 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 MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Priority to AT86100744T priority Critical patent/ATE58870T1/de
Publication of EP0190600A2 publication Critical patent/EP0190600A2/fr
Publication of EP0190600A3 publication Critical patent/EP0190600A3/de
Application granted granted Critical
Publication of EP0190600B1 publication Critical patent/EP0190600B1/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
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/04—Ducts, containers, supply or metering devices with duct-blades or like metering devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2231/00—Inking devices; Recovering printing ink
    • B41P2231/12—Axially segmented ink blades

Definitions

  • a device of this type is known from DE-PS 3 030 774.
  • Devices of the type mentioned are used in inking units of printing machines, in particular in offset printing machines, in order to achieve an exact and reproducible adjustment of the amount of ink.
  • the amount of ink must be different in the width direction of the printing press and can be set independently of the zone.
  • the problem with this arrangement is that an extremely precise alignment of the individual metering elements is necessary for very small ink layer thicknesses.
  • the effort involved in this and the risk of damage to the dosing edge of the individual dosing elements should not be underestimated.
  • Insufficiently precise alignment of individual dosing elements or the slide tips on the color sliders of the dosing elements can result in so-called edge supports which do not allow the exact dosing of the respective dosing elements. Since in these cases the printer tries to completely adjust the dosing element in the respective zone Starting against the ink fountain roller easily results in damage due to increased wear. In all of this, however, the accuracy of the setting should be guaranteed.
  • the orientation of the plug-in shoe to the slide on the described color metering element cannot be changed, ie the metering edge cannot be adjusted in relation to the slide. Manufacturing errors are therefore fully transferred to the exactness of the dosage.
  • the ink metering element reduces the susceptibility to wear, but does not guarantee the exact setting of even thin ink layers.
  • the exact alignment and adjustment of the dosing edge of the respective dosing elements to each other causes as great problems as the adjustment with respect to the ink fountain roller.
  • the metering edge would have to bend to completely shut off the ink supply.
  • the object of the invention is therefore to create a device for metering the amount of ink on an ink fountain roller, in which the effort for aligning the ink metering elements with respect to the ink fountain roller and the force from the metering element on the ink fountain roller is reduced significantly with minimal ink guidance, the metering edge of which is reduced must be able to align easily and overall on the surface of the ink fountain roller.
  • the rigid design of the slide tip always defines the position of the dosing edge in relation to the drive of the dosing elements. Due to the rotatable arrangement of the slide tip on the metering element, it is possible that simply by placing the slide tip on the ink fountain roller Direction of the dosing edge against the surface of the ink fountain roller. Manual fine adjustment is not necessary. It has been shown that the hydrodynamic influences from the printing ink do not have a negative effect on the alignment of the metering edge if the slide tip is designed in the form of an oscillating element. The respective slide tip adjusts itself to a balance of forces from the pressure in the printing ink drawn through the ink gap.
  • the center point of the metering edge is always at the correct distance from the ink fountain roller while the corner points of the metering edge are each the same or correspondingly different distance from the surface of the ink fountain roller.
  • the opening available for ink transport has the same area, ie the amount of ink transported through is always the same across the width of an ink zone.
  • the metering edge can only be inclined if there are manufacturing inaccuracies in the area of the slide tip bearing, but these can hardly have any effect due to the flexible attachment.
  • the inaccuracies are also very small and, in the end, do not play a role in the ink distribution, since the layer differences still existing on the ink fountain roller within a single ink zone are almost completely leveled out again by the rubbing across the inking unit.
  • a very decisive effect of the device shown is that, even when the ink metering elements of this type are oriented obliquely relative to the surface of the box roller, edge supports can no longer be produced.
  • the pusher tip When closing the dosing elements or when closing the ink gap, the pusher tip is supported with the protruding corner on the surface of the ink fountain roller and then aligns itself via its rotatable mounting until the metering edge lies completely against the surface of the ink fountain roller.
  • the mounting of the slide tips on the dosing elements generally does not require too high an accuracy, since the only thing that is important is to create a contact surface for the slide tip which enables the slide tip to be aligned about a pivot point.
  • the slide tip can also be easily exchanged.
  • the pusher tip can even be replaced in the ink fountain without the dosing element having to be removed from the ink fountain. This achieves very significant advantages in terms of assembly and set-up effort and, above all, the setting accuracy of the color metering elements.
  • FIG. 1 The basic assignment of an ink fountain 1 to an ink fountain roller 2 can be seen from FIG. 1.
  • a metering element 3 is fastened with its drive 4.
  • the drive 4 is coupled to a paint slide 6 without play via an adjusting spindle 5.
  • the ink slide 6 can be moved radially or approximately radially to the ink fountain roller 2.
  • a slide tip 7 is arranged on the paint slide 6.
  • the movement of the ink slide 6 moves a metering edge 8 on the front of the slide tip 7 relative to the ink fountain roller 2. This creates an ink gap 9 between the surface of the ink fountain roller 2 and the metering edge 8.
  • the assignment of the metering elements 3 in the direction of the axis A of the ink fountain roller 2 can be seen from FIG. 2.
  • the metering elements 3 with their drives 4 are mounted next to one another on the ink fountain 1.
  • the longitudinal axes B of the metering elements 3 are essentially parallel to one another. The assignment is chosen so that the slide tips 7 touch each other. Touch is not provided for the color slider 6.
  • the alignment of the dosing elements 3 is determined by fastening screws. These fastening screws engage in screw holes in the metering elements 3 and hold them firmly on the lower part of the ink fountain 1. When aligning the dosing elements 3 with respect to the surface of the ink fountain roller 2, the screwing of the dosing elements 3 on the ink fountain 1 plays an important role.
  • Fig. 3 it is shown once in cross section.
  • a holding bolt 10 is riveted into the color slide 6, standing perpendicular to its planar extent. It is threaded.
  • the slide tip 7 is held by a retaining nut 11 on the retaining bolt 10 on the paint slide 6 and secured against tipping.
  • the holding nut 11 should be provided with a transverse slot for better assembly. It can be screwed into a countersink 12, at the bottom of which a fastening opening 13 is provided for guiding the slide tip 7.
  • the countersink 12 and the fastening opening 13 are perpendicular to the bearing surface 14.
  • this fastening opening 13 and its size designation for the holding bolt 10 mentioned will be explained in more detail since they mainly determine the movement behavior of the slide tip 7.
  • An intermediate layer for example a disc spring, can be provided between the holding nut 11 and the slide tip 7 in order to make the position of the slide tip 7 free of play and to compensate for inaccuracies in production.
  • the retaining nut 11 can, however, be placed on the retaining bolt 10 just above the slide tip 7 without an intermediate layer, and then be secured, for example, by gluing that it secures the slide tip 7 directly. In this way, on the one hand, free movement of the slide tip 7 on its support surface 14 is ensured, and on the other hand, no tilting of the slide tip 7 from the smooth support on the paint slide 6 is possible.
  • the counterbore 12 is filled with a filling compound and protected against penetrating ink.
  • the slide tip 7 should align itself once on the surface of the ink fountain roller 1, and only if the ink gap 9 is to be closed.
  • the ink gap 9 is opened, the play within the bearing is to be exploited by the slide tip 7 then leveling off in the manner of a balance with respect to the ink slide 6 due to the hydrodynamic pressure arising from the printing ink.
  • the passage cross-section at the ink gap 9 will always correspond to the opening cross-section required for a certain amount of ink, since the characteristic size for the amount of ink is the position of the ink slide 6 or its respective alignment surface.
  • a very simple variant is shown in FIG. 4.
  • the fastening opening 13 is provided as a simple borehole 15, which has a relatively large amount of play in relation to the retaining bolt 10.
  • the borehole 15 can face forward be slightly expanded so that there is a flat contact surface 16.
  • the slide tip 7 When aligning with the ink fountain roller 2 or due to the effect of the color pressure, the slide tip 7 is normally in contact with the contact surface 16, but can move to all sides, the axis of rotation being behind the metering edge 8.
  • FIG. 5 A further version is shown in FIG. 5.
  • the slide tip 7 is shown here with the axis of rotation C shifted to the rear edge. For this purpose, it is provided with a curved rear surface 17 which lies opposite the metering edge 8. With this rear surface 17, the slide tip 7 is to be supported on a straight support surface 18 of the paint slide 6. To hold the slide tip 7 on the paint slide 6, a retaining bolt 10 is again attached in the paint slide 6. Furthermore, an elongated hole 19 is provided in the slide tip 7, through which the retaining bolt 10 engages.
  • the slider tip 7 is secured according to the known mode.
  • This variant can be changed in different ways. This is possible, for example, in that the curved surface is not attached to the slide tip 7 but to the paint slide 6.
  • the rear surface 17 of the slide tip 7 is then provided as a flat surface.
  • the slide tip 7 can be supported on its flat rear surface 17 on a cylindrical pin inserted into the paint slide 6.
  • the game can also be removed from the storage. This sometimes complicates the construction of the metering elements 3, since greater precision during manufacture must now be required.
  • the slide tips 7 are mounted without play in the longitudinal direction. It is assumed in a second basic idea that the pusher tips 7 should always be guided exactly in the longitudinal direction, but that they should be aligned with the longitudinal axis B. should be able to adjust themselves regarding the angular position and the position transverse to the longitudinal axis B. When this setting has been made, its orientation should be largely maintained, but at least until the next setting.
  • FIG. 6 represents a middle position between the two basic ideas described.
  • the slide tip 7 is again provided with an elongated hole 19 as a fastening opening.
  • the back surface 17 is now straight and does not touch the color slide 6.
  • a recess is incorporated, so that a holding cam 20 remains at the outer edge of the support surface 18.
  • a leaf spring 21 is clamped, which, with its curvature, loads the rear surface 17 of the slide tip 7, so that the latter is set against the retaining bolt 10 with the rear boundary surface of the elongated hole 19.
  • the slider tip 7 is thus kept free of play in the longitudinal direction, but can perform rotary or sliding movements.
  • the leaf spring 21 will push it back into a force-free normal position. With respect to its alignment with the longitudinal axis B of the metering elements 3, this normal position depends on the manufacturing accuracy of the arrangement mentioned, in particular on the centering of the leaf spring 21 with respect to the retaining bolt 10.
  • FIG. 7 shows the version of a slide tip 7 which is movable on the paint slide 6 and which, according to current knowledge, is the most economical, constructively and procedurally most favorable design can be seen.
  • the realization is realized that the play in the bearing is minimized in the direction of movement of the color slide 6, but is to be adapted transversely to the direction of movement to the conditions for position compensation.
  • a guide pin 22 is inserted on the paint slider 6.
  • the guide pin 22 is provided with a tolerated surface.
  • the slide tip 7 is provided with a guide slot 23.
  • the guide slot 23 has dimensions as follows: parallel to the metering edge 8, it is approximately 1 mm larger than that provided by the diameter of the guide pin 22; the width of the guide slot 23 in the direction of the longitudinal axis B is equal to the diameter of the guide pin 22.
  • the surfaces of the guide slot 23 which are parallel to the dosing edge 8 are designed as flat guide surfaces 24 and have to be largely parallel.
  • the slider tip 7 should still be relatively easy to place on the guide pin 23 and still remain movable there. Therefore, a movement distance 25 to the color slide 6 is also necessary at the rear. Only the type of securing shown in FIG. 3 is still to be provided for the holder. When the color slide 6 moves, it is always ensured that the slide tip 7 follows the specification from the drive 4. Nevertheless, the mobility of the slide tip 7 relative to the paint slide 6 and thus also relative to the metering element 3 is ensured.
  • the slide tips 7 are provided on their side edges 26 tapering towards the rear.
  • a cylindrical sealing surface 27 should be attached to a short piece of the side edges 26 in the area of the metering edge 8 for optimum mobility and sealing.
  • these sealing surfaces 27 are lapped at a length of approximately 2 mm and provided with a low-friction coating.
  • the installation space is predetermined by the slide tips 7 lying to the side of the slide tip 7 under consideration.
  • a lateral displacement of the rear corners must also be possible, since the slide tip 7 is supported on the sealing surface 27 during its rotation.
  • the holder of the slide tip 7 is provided with a sufficiently large play that can accommodate the maximum possible lateral movement of the slide tip 7, and the width of the slide tip 7 decreases continuously from the dosing edge 8 towards the rear.
  • a wedge-shaped movement space 28 thus arises between two slide tips 7.
  • each metering element 3 can now be individually adjusted to a zero point.
  • the ink slide 6 is moved in the direction of the ink fountain roller 2 with the aid of the drive 4. If the alignment of the dosing element 3 with respect to the ink fountain roller 2 is not exactly right-angled or if the slide tip 7 is not exactly seated on the ink slide 6, one of the corners of the dosing edge 8 will first come into contact with the ink fountain roller 2.
  • the slide tip 1 due to the mobility of the slide tip 1, the latter will rotate on the ink slide 6 until the metering edge 8 lies completely smoothly on the surface of the ink fountain roller 2. Only then is the real zero position of the metering element 3 reached. This can then be held mechanically or electrically. In such an adjusted position, the ink supply to a subsequent inking unit is completely switched off for the ink zone in question. The adjustment of the dosing elements 3 can now be carried out one after the other for the entire ink fountain 1.
  • the relative movement referred to as the sliding movement also leads to the side edges 26 of the slide tips 7 moving relative to one another. Therefore, it is also necessary that the slide tips 7 are not pointed at their front corners and not exactly at right angles to the metering edge 8 on the side edges, but have the shape described above.
  • the described relative movements are eliminated. It assumes that the axis of rotation C of the slide tip 7 is placed in the metering edge 8.
  • the entire rear boundary surface of the slide tip 7 can be designed as an arcuate joint surface 29. It is supported in a support surface 30 which is also designed in the form of a circular arc.
  • the corners of the metering edge 8 move on a circular path corresponding to the articulated surface 29 of the slide tip 7 about the axis of rotation intended through the metering edge 8. This ensures that they do not move beyond the lateral limit that is specified in the normal position.
  • a slider tip 7 of this shape cannot collide anywhere with an adjacent slider tip 7.
  • Backlash can also be achieved in the form of a counter bearing surface to the joint surface on the slide tip 7.
  • the slide tip must be made from a cylindrical blank with a diameter corresponding to the width of the ink zone, a cylindrical base serving as a bearing and the metering edge having a diameter on the end face opposite the base.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Ink Jet (AREA)
EP86100744A 1985-02-04 1986-01-21 Dispositif de dosage d'encre pour machines à imprimer Expired - Lifetime EP0190600B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86100744T ATE58870T1 (de) 1985-02-04 1986-01-21 Farbdosiereinrichtung an druckmaschinen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3503736A DE3503736C1 (de) 1985-02-04 1985-02-04 Farbdosiereinrichtung an Druckmaschinen
DE3503736 1985-02-04

Publications (3)

Publication Number Publication Date
EP0190600A2 true EP0190600A2 (fr) 1986-08-13
EP0190600A3 EP0190600A3 (en) 1988-07-20
EP0190600B1 EP0190600B1 (fr) 1990-12-05

Family

ID=6261621

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86100744A Expired - Lifetime EP0190600B1 (fr) 1985-02-04 1986-01-21 Dispositif de dosage d'encre pour machines à imprimer

Country Status (6)

Country Link
US (1) US4711175A (fr)
EP (1) EP0190600B1 (fr)
JP (1) JPH0613216B2 (fr)
AT (1) ATE58870T1 (fr)
BR (1) BR8600690A (fr)
DE (1) DE3503736C1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5279223A (en) * 1991-06-28 1994-01-18 Kabushiki Kaisha Tokyo Kikai Seisakusho Ink feed adjusting apparatus for use in ink supply equipment
DE4131679C1 (fr) * 1991-09-24 1993-04-08 Man Roland Druckmaschinen Ag, 6050 Offenbach, De
US5438927A (en) * 1994-03-09 1995-08-08 R. R. Donnelley & Sons Company Ink fountain assembly
DE19517834C2 (de) * 1995-05-16 1997-03-27 Stegmann Max Antriebstech Farbschieber für die Farbkastenwalze einer Druckmaschine
DE19860641A1 (de) * 1998-12-29 2000-07-06 Koenig & Bauer Ag Farbzuführeinrichtung für einen Farbduktor
ATE302117T1 (de) * 1999-02-23 2005-09-15 Kba Giori Sa Farbmesser für eine druckmaschine
US6405649B1 (en) 1999-02-23 2002-06-18 De La Rue Giori S.A. Ink fountain blade for a printing machine
DE10111894B4 (de) * 2001-03-13 2005-03-17 Sick Stegmann Gmbh Farbzonendosiereinheit
DE102004040167B4 (de) * 2003-08-20 2009-09-24 Manroland Ag Farbdosiereinrichtung mit beweglicher Schieberspitze
DE10338224B4 (de) * 2003-08-20 2010-10-14 Manroland Ag Farbdosiereinrichtung mit beweglicher Schieberspitze
DE10338223A1 (de) * 2003-08-20 2005-03-17 Man Roland Druckmaschinen Ag Farbdosiereinrichtung mit beweglicher Schieberspitze
EP1588854A1 (fr) 2004-04-22 2005-10-26 Kba-Giori S.A. Encrier pour machine d'impression
JP2005334927A (ja) 2004-05-26 2005-12-08 Yamazaki Mazak Corp レーザ加工機における突起物除去加工装置
DE102007053595B4 (de) * 2007-11-09 2018-10-11 manroland sheetfed GmbH Verfahren zur Einstellung einer Farbdosiereinrichtung
DE102008001917A1 (de) 2008-05-21 2009-11-26 Manroland Ag Farbdosiereinrichtung mit beweglicher Schieberspitze

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0021002A1 (fr) * 1979-06-12 1981-01-07 Heidelberger Druckmaschinen Aktiengesellschaft Dosage de l'encre au moyen de lames d'encrage individuelles s'étendant chacune sur toute la largeur de la région de réglage
DE2951653A1 (de) * 1979-12-21 1981-07-02 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Vorrichtung zum dosieren von farbe auf der farbkastenwalze eines farbwerks fuer druckmaschinen
EP0046206A1 (fr) * 1980-08-14 1982-02-24 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Dispositif pour doser la quantité d'encre dans des mécanismes d'encrage de machines à imprimer
EP0120298A2 (fr) * 1983-03-26 1984-10-03 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Eléments de dosage pour les encriers de machine d'impression offset

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3978788A (en) * 1975-05-16 1976-09-07 Roland Offsetmaschinenfabrik Faber & Schleicher Ag Ink metering assembly for printing press

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0021002A1 (fr) * 1979-06-12 1981-01-07 Heidelberger Druckmaschinen Aktiengesellschaft Dosage de l'encre au moyen de lames d'encrage individuelles s'étendant chacune sur toute la largeur de la région de réglage
DE2951653A1 (de) * 1979-12-21 1981-07-02 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Vorrichtung zum dosieren von farbe auf der farbkastenwalze eines farbwerks fuer druckmaschinen
EP0046206A1 (fr) * 1980-08-14 1982-02-24 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Dispositif pour doser la quantité d'encre dans des mécanismes d'encrage de machines à imprimer
EP0120298A2 (fr) * 1983-03-26 1984-10-03 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Eléments de dosage pour les encriers de machine d'impression offset

Also Published As

Publication number Publication date
US4711175A (en) 1987-12-08
EP0190600B1 (fr) 1990-12-05
ATE58870T1 (de) 1990-12-15
EP0190600A3 (en) 1988-07-20
DE3503736C1 (de) 1985-12-05
JPH0613216B2 (ja) 1994-02-23
BR8600690A (pt) 1986-10-29
JPS61181644A (ja) 1986-08-14

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