WO2009063013A1 - Perfectionnement de tramage en sens opposé d'un cylindre tramé - Google Patents

Perfectionnement de tramage en sens opposé d'un cylindre tramé Download PDF

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Publication number
WO2009063013A1
WO2009063013A1 PCT/EP2008/065487 EP2008065487W WO2009063013A1 WO 2009063013 A1 WO2009063013 A1 WO 2009063013A1 EP 2008065487 W EP2008065487 W EP 2008065487W WO 2009063013 A1 WO2009063013 A1 WO 2009063013A1
Authority
WO
WIPO (PCT)
Prior art keywords
anilox roller
anilox
roller
lateral surface
region
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.)
Ceased
Application number
PCT/EP2008/065487
Other languages
German (de)
English (en)
Inventor
Frank Dirksmeier
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.)
Windmoeller and Hoelscher KG
Original Assignee
Windmoeller and Hoelscher KG
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 Windmoeller and Hoelscher KG filed Critical Windmoeller and Hoelscher KG
Publication of WO2009063013A1 publication Critical patent/WO2009063013A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N7/00—Shells for rollers of printing machines
    • B41N7/06—Shells for rollers of printing machines for inking rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/10—Forme cylinders
    • B41F13/11—Gravure cylinders
    • 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
    • B41F31/027—Ink rail devices for inking ink rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/26—Construction of inking rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N2207/00—Location or type of the layers in shells for rollers of printing machines
    • B41N2207/02—Top layers

Definitions

  • the invention relates to an anilox roll according to claim 1 and to a method for operating a printing press according to claim 13.
  • Anilox rolls are known. They are mainly used in rotary printing presses to convey color within printing units. This ink transfer is accomplished by placing the anilox roller in rotation about its principal axis of inertia. In this case, the lateral surface of the anilox roller takes on a color reservoir, which can be an ink tray, a doctor chamber or another color-transporting roller, color and transports them to a color picker - usually another roll.
  • a color reservoir which can be an ink tray, a doctor chamber or another color-transporting roller, color and transports them to a color picker - usually another roll.
  • ink is generally transported between a doctoring chamber and the printing plate-carrying plate roller.
  • the adjacent components - in flexographic printing, especially the doctor blade of the doctor blade chamber - are damaged or worn out by the surface structures of the anilox roller.
  • the rotation of the anilox roller leads to splashes of paint and to a color transport transversely to the direction of rotation of the roller. This transport of paint in the axial direction of the roller may result in the use of doctoring chambers that paint creeps under the seals that seal the squeegee chambers on the face.
  • DE 198 47 108 C2 proposes a number of measures, which all have in common, the lateral surface of the anilox roller in the region of at least one front end of the anilox roll shape as the rest of the lateral surface.
  • cells are lined up on spiral lines. At said at least one end, the pitch of the helical lines is different than on the remainder of the roller. Tests have shown that this type of design of the outer surface of the rolls brings improvements. However, there is still room for improvement with respect to the reduction or avoidance of color transport across the rotational direction of the roll.
  • the object of the invention is to propose an anilox roller and a method for operating a printing machine, with the (anilox roller) or the (process) less color is conveyed transversely to the rotational direction of the anilox roller and which or which none of the aforementioned disadvantages of the anilox roller reinforced ,
  • the present invention is based on the teaching of DE 198 47 108 C2 and solves the problem by the inclusion of the characterizing features of claims 1 and 13. Tests have shown that the promotion of color to a front end does not occur when
  • the lateral surface of the anilox roller has a Haschurengravur at least in the region of the first front end of the anilox roller
  • Haschurengravur has grooves which is inclined by an angle whose amount is greater than 0 °, with respect to the Lot on the main axis of symmetry of the anilox roller.
  • Haschurengravur has evolved in professional circles to a surface structure, the grooves, but no cups During the passage past the ink reservoir, the roller stores ink in the grooves and dispenses it to the dye receiver
  • the raised parts of the engraving are formed by webs separating the grooves from each other. It is obvious that especially the webs are subject to friction.
  • the webs / grooves are inclined relative to the radial direction (Lot on the main axis of inertia) by an angle (greater than 0 °) and run without interruption (spiral) in the axial direction of the anilox roller.
  • the color is returned to the web walls by rotation of the anilox roller and thereby from at least one front end of the roller away in the middle of the same (possibly returned.
  • the equipment of the other, second end-side end portion of the lateral surface of the anilox roller with a Haschurengravur is advantageous.
  • the angle at which the grooves of the Hashubian engraving are inclined to a perpendicular on the main axis of symmetry may have an opposite sign in the two end regions.
  • the hash engraving in both end regions can promote color away from the face ends toward the center of the roll.
  • the harmful collection of paint at the ends of the doctor blade is thus avoided.
  • the amount of the two angles can be the same.
  • the use of wells in the middle region of the roll - or more generally in the areas of the shell surface which are not precisely provided with the special hash engraving - is one of the advantageous measures. In general, these will be wells that are separated from each other by webs and absorb the color.
  • These wells may be surrounded by a hexagonal border ("webs"), hexagonal structures of adjacent regular hexagons resembling a honeycomb pattern are advantageous, and if the hexagons are aligned so that the upper and lower legs are aligned parallel to the roll axis, so In this case, the lines connecting the centers of adjacent hexagons are at an angle of 0 ° to a perpendicular on the roll axis when the hexagons are directly above or below each other are arranged obliquely next to each other, these lines have an angle of 30 °.
  • the areas of the lateral surface which are covered by a Haschurengravur have grooves which are also arranged at an angle of 30 ° to the solder on the axis. It should also be mentioned that the multiply plotted solder points in the radial direction of the roller.
  • the rolls according to the invention are very well suited for use in printing processes with anilox rolls.
  • the advantages that the rollers bring with them during ink transport are more pronounced during the transport of solvents.
  • these advantages still reinforced in itself, since the solvent is now promoted by the Haschurengravur targeted reinforced in the end regions of the roller and Here color encrustations on the lateral surface, but also from the adjacent areas of adjacent components - such as a doctor blade - dissolves.
  • Fig. 1 is a view of an anilox roller
  • Fig. 2 shows a cross section of an anilox roller
  • Fig. 3 is a view of another embodiment of a
  • Anilox roller Fig. 4 A view of a further embodiment of a
  • Anilox roller Fig. 5 A view of a further embodiment of a
  • FIG. 6 An enlarged view of a hexagon pattern from FIG. 5
  • FIG. 7 A sketch of a hexagon
  • Fig. 1 shows an anilox roller 1, which has a lateral surface 2.
  • the anilox roller 1 has a surface which contains metal - advantageously chrome and / or ceramic.
  • the surface structures are often introduced by means of lasers, such as YAG or CO 2 lasers. In the structures mentioned above and below, which have wells 6 and webs 5, often 60 to 500 wells 6 per cm 2 will be introduced. It is clear from the above statements that the surface 2 of an anilox roller 1 often has a hardness of 55 to 80 Shore A. However, 75 to 100 are advantageous.
  • the surface of rubberized rolls or rollers provided with an elastomeric shell on the other hand, has a hardness of 15 to 35 Shore A.
  • Anilox rollers are mainly used in flexographic printing. There they often take paint directly from a doctoring chamber or a paint tray. Often they pass on the paint directly to a cliché roller (format cylinder). Seen from the viewer left end portion 3 of the roller 1, which is associated with the front end 9, is provided with the grooves 4 and webs 5 a Haschurengravur. At the other (second) front end 10 of the anilox roller 1 is a second end portion 13, which is also provided with a similar Haschurengravur.
  • the anilox roller 1 shown has pins 7. However, anilox rolls according to the invention can just as well be constructed as sleeving rolls or in another way.
  • the main axis of inertia A of the roller 1 is shown by a dashed line.
  • the solder L on the main axis of inertia points in the radial direction r of the same 1.
  • An angle W is formed between this solder L and the projection of the grooves 4 or webs 5 into the image plane. This is advantageously at 30 ° or within a reasonable tolerance range (+/- 5 ° or +/- 10 °) around this angle.
  • the central region 11 of the roller 1 is equipped with webs 5 and 6 wells.
  • the cups 6 counteract in this central region of the "migration" of ink in the axial direction z of the roller 1.
  • Particularly advantageous in the middle region 11 is the use of cups 6, which form this part of the lateral surface 2 as a pattern of isosceles hexagons cover.
  • FIG. 2 shows a section through an anilox roller 1 and illustrates in this way the terms lateral surface 2 and peripheral coordinates ⁇ .
  • FIG. 3 shows a further embodiment of a roll according to the invention, which has only differences in the second end-side region 13 to the roll shown in FIG. 1:
  • the grooves 14 and webs 15 are opposite to the solder L in the other direction, but around the same Angle amount inclined as the grooves 4 and webs 5 of the first area.
  • the exemplary embodiment shown in FIG. 4 has two structure-free regions located between the middle region 11 and the two end regions 3 and 13 in comparison with the exemplary embodiment shown in FIG. Here are neither cup 6 nor grooves, that is, the areas 8 are usually smooth.
  • FIG. 4 also shows how paint is transported by the webs in the axial direction z of the roll 1.
  • the arrow P which points in the direction of the circumference of the pin 7, here also marks the direction of rotation of the roller 1.
  • this rotation of the roller produces a circular velocity on the lateral surface 2 of the roller 1.
  • This is represented by the vector arrow V.
  • the vector arrow V forms 5 angles with the webs.
  • the angles ⁇ shown in FIG. 4 lie between 0 ° and 90 °.
  • the resulting color flow q follows the inclination of the webs 5 or grooves 4 against the vector V.
  • FIG. 4 In the exemplary embodiment shown in FIG.
  • FIG. 5 shows an anilox roller 1 which is designed in the end regions 3, 13 in the same way as the rollers shown in FIGS. 3 and 4.
  • a hexagonal grid of the middle region 11 of the roller 1 is indicated two sides 20 and 21 of a hexagon are aligned in their projection in the image plane parallel to the axis A.
  • these webs 5 may include the wells 6 in any form.
  • the webs may for example be circular or rectangular.
  • FIGS. 6 and 7 once again show the geometric properties of an arrangement of rectangles, as shown in FIG.
  • Equal or regular hexagons 20, 23, 26 have six corners which are on the circumference of a circle 25, as shown in FIG.
  • This circle can be associated with a center 24, which is called the center of the hexagon 23 for the sake of simplicity.
  • the connecting lines 28 between the centers 24 of hexagons 29, which lie directly above each other, are in their projection in the plane parallel to the Lot L. when the arrangement of the hexagon pattern has been made in the advantageous shape shown in FIG.
  • the alignment of a hexagonal structure, which leads to an angle of +/- 10 ° or + / 5 ° between the solder L and the connecting lines 27, is considered to be advantageous.
  • Between the connecting lines 27 and 28 forms an angle ⁇ of 30 °.

Landscapes

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

Abstract

L'invention concerne un cylindre tramé (1) pour transporter de l'encre dans un groupe d'impression de machine d'impression, cylindre (1) qui présente sur sa surface d'enveloppe (2) des structures (4, 5, 6) qui servent à transporter l'encre en direction du matériau à imprimer, lesdites structures (4, 5, 6) situées sur la surface d'enveloppe (2) du cylindre tramé (1) étant imprimées différemment dans la zone d'au moins une première extrémité frontale (9, 10) du cylindre tramé (1), comaprativement aux autres zones du cylindre. Selon l'invention, la surface d'enveloppe (2) du cylindre tramé (1) présente une gravure en hachures au moins dans la zone (3) de la première extrémité frontale (9) du cylindre tramé (1), ladite gravure en hachures présentant des rainures (4, 14) qui sont inclinées d'un angle (W) supérieur à 0° par rapport à la perpendiculaire (L) à l'axe de symétrie principal (A) du cylindre tramé (1).
PCT/EP2008/065487 2007-11-13 2008-11-13 Perfectionnement de tramage en sens opposé d'un cylindre tramé Ceased WO2009063013A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007054045.2 2007-11-13
DE200710054045 DE102007054045A1 (de) 2007-11-13 2007-11-13 Weiterentwicklung gegenläufige Rasterung auf einer Rasterwalze

Publications (1)

Publication Number Publication Date
WO2009063013A1 true WO2009063013A1 (fr) 2009-05-22

Family

ID=40139270

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/065487 Ceased WO2009063013A1 (fr) 2007-11-13 2008-11-13 Perfectionnement de tramage en sens opposé d'un cylindre tramé

Country Status (2)

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DE (1) DE102007054045A1 (fr)
WO (1) WO2009063013A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5222434A (en) * 1990-07-26 1993-06-29 Petco, Inc. Soft rollers for ink and water feeding rollers used in off-set printing presses
DE19847108A1 (de) * 1998-10-13 2000-04-27 Windmoeller & Hoelscher Rasterwalze
DE10112756A1 (de) * 2000-04-26 2001-10-31 Heidelberger Druckmasch Ag Filmfarbwerk in einer Druckmaschine und verfahren zu dessen Reinigung
NL1028791C2 (nl) * 2005-04-18 2006-10-20 Wilhelmus Reijnen Geprofileerde inktwals.

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2369814A (en) * 1940-11-14 1945-02-20 Goss Printing Press Co Ltd Rotary printing press

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5222434A (en) * 1990-07-26 1993-06-29 Petco, Inc. Soft rollers for ink and water feeding rollers used in off-set printing presses
DE19847108A1 (de) * 1998-10-13 2000-04-27 Windmoeller & Hoelscher Rasterwalze
DE10112756A1 (de) * 2000-04-26 2001-10-31 Heidelberger Druckmasch Ag Filmfarbwerk in einer Druckmaschine und verfahren zu dessen Reinigung
NL1028791C2 (nl) * 2005-04-18 2006-10-20 Wilhelmus Reijnen Geprofileerde inktwals.

Also Published As

Publication number Publication date
DE102007054045A1 (de) 2009-05-20

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