EP1522408A1 - Blanchet pour un cylindre d'une machine à imprimer, ensemble de blanchets et procédé pour sa réalisation. - Google Patents

Blanchet pour un cylindre d'une machine à imprimer, ensemble de blanchets et procédé pour sa réalisation. Download PDF

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Publication number
EP1522408A1
EP1522408A1 EP04104950A EP04104950A EP1522408A1 EP 1522408 A1 EP1522408 A1 EP 1522408A1 EP 04104950 A EP04104950 A EP 04104950A EP 04104950 A EP04104950 A EP 04104950A EP 1522408 A1 EP1522408 A1 EP 1522408A1
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EP
European Patent Office
Prior art keywords
elevator
layer
anisotropy
cylinder
equal
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
EP04104950A
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German (de)
English (en)
Other versions
EP1522408B1 (fr
Inventor
Ralf Christel
Oliver Hahn
Karl Schaschek
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
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Koenig and Bauer AG
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Filing date
Publication date
Priority claimed from DE102004005893A external-priority patent/DE102004005893B4/de
Application filed by Koenig and Bauer AG filed Critical Koenig and Bauer AG
Publication of EP1522408A1 publication Critical patent/EP1522408A1/fr
Application granted granted Critical
Publication of EP1522408B1 publication Critical patent/EP1522408B1/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
    • B41F30/00—Devices for attaching coverings or make-ready devices; Guiding devices for coverings
    • B41F30/04—Devices for attaching coverings or make-ready devices; Guiding devices for coverings attaching to transfer cylinders

Definitions

  • the invention relates to elevators for a cylinder of a printing press, sets of Elevators and methods for their production according to the preamble of claims 1 or 2 or 27 to 29.
  • the nip transfer cylinder paper can cause wave or even wrinkling of the paper. This is the case with small diameter / bale width ratios, in particular so with single-circumference transfer cylinders and double- or multi-width paper webs (ie 2 ... n printing plates wide).
  • the wave formation can lead to registration problems (distorting the image).
  • the wrinkling leads to waste.
  • blanket sleeves sleeves
  • d. H. bulbous or slightly barrel-shaped produced.
  • This will the pressure handling kept sufficiently constant over the bale width. Disadvantageous this is a relatively expensive, and therefore expensive sleeve construction or processing be.
  • a support camp (ie a double location) on the rubber cylinders used to initiate a static counter-bending moment that the Bending moment compensated due to the compressive stress, so the cylinder is in the essentially no longer sags.
  • a support bearing means i.d.R. an extra effort. Often, no support bearing can be realized due to the increased installation space.
  • the Setting the static counterbending is complex on the assembly side.
  • a support camp is with the cantilevered version of the storage necessary for sleeves usually not compatible.
  • the fabric is pre-stretched as a (endless) web and rolled under high pressure at elevated temperature. As a result of this process the fabric has a larger modulus of elasticity in the direction of the fabric web than perpendicular to. In the blankets, the fabric is processed so far that the Fabric web direction is either parallel or perpendicular to the printing process.
  • DE 44 36 973 A1 discloses a variation of the cylinder profile or elevator profile in axial direction, to a transport behavior over the length of the cylinder axially to vary.
  • EP 0 631 884 A1 discloses a blanket sleeve for a cylinder is disclosed, the mechanical properties relating to a radial and a circumferential direction anisotropic.
  • the sleeve has an at least two-fold spiral wound reinforcing film of randomly oriented fibers, which of the sleeve in radial direction gives elasticity and in the circumferential direction stiffness.
  • DE 697 00 995 T2 has a blanket with respect to a radial and a circumferential direction anisotropic layer on.
  • EP 1 240 452 B1 discloses a thin-walled hollow cylinder which is superimposed two anisotropic layers with the cylinder axis in each case inclined in opposite directions Fiber directions and / or a layer with the cylinder axis parallel or vertical having running fibers.
  • the invention is based on the object elevators for a cylinder of a Printing machine to create sets of elevators and methods of making them.
  • the achievable with the present invention consist in particular that an elevator or a set of elevators is created, the wrinkles or the formation of waves eliminated or at least reduced.
  • a roller 02 or a cylinder 02 a web-processing machine, in particular a printing press, and a Abutment - z. B. a second, not shown cylinder - runs one with the Cylinder 02 cooperating for transport and / or printing purposes, in particular to be printed, Bahn 04, z. B. paper web.
  • the surface layer 01 can be fixed and insoluble - z. B. cohesively - connected to a main body of the cylinder 02, or but advantageous as a detachable elevator 01, z. B. as a finite blanket or blanket or as a blanket sleeve.
  • the elevator 01 is therefore equipped with at least one layer 06, which in the elevator or blanket level (level of the unrolled elevator 01) at least one has mechanical anisotropy or caused in the overall structure.
  • This mechanical Anisotropy can in particular in the elastic modulus E and / or in the Quercon Heationsteil ⁇ lie.
  • an inventive anisotropic elevator 01 as elevator 01 with at least an anisotropic expansion behavior of the elevator structure at its surface causative layer 06 are understood, the main axes of anisotropy aware - and outside of deviations due to manufacturing tolerances - of deviate from the longitudinal or circumferential direction parallel and perpendicular direction, d. H. are inclined by an angle ⁇ , with ⁇ ⁇ 0 ° and ⁇ ⁇ 90 °.
  • anisotropic Layer 06 can be effective (Fig. 3b) .
  • This further functional layer (s) 09 can or may also be compressible and / or elastic layers. Possibly. additionally existing adhesive layers are not shown in Fig. 3.
  • cover layer 07 and anisotropic layer 06 can - as exemplified in Fig. 3a, a thin be arranged further functional layer 09. This can especially for a several layers 06 having arrangement according to FIG. 3b apply.
  • Any anisotropic Layer 06 may in turn be multi-layered, for example in the manner of a multilayer Laminate or a multiple winding may be formed.
  • effective layer 06 wear mainly layers 06 of the elevator 01st at, which viewed from the inside (possibly support layer 11) to the outside (cover layer 07) are lined by at least one compressible layer 08.
  • Such Embodiment with a relining of the anisotropic layer 06 has advantages in terms the effect on the surface. Ie. the layer 06 is regarding its anisotropic function particularly effective if, when pressure is exerted on the elevator 01 in the radial direction is resiliently stored.
  • a lined layer 08 has z. B. perpendicular to It is advantageous to consider a modulus of elasticity of less than 200 MPa, in particular less than 130 MPa, z. B. 1 to 50 MPa.
  • the reversibly compressible and / or elastic layer 08 and optionally one or more further compressible and / or elastic functional layers 09 can as porous foams, as soft rubber or as dimensionally stable, but elastically deformable Plastics, advantageously be designed as elastomers such as polyurethane. But it can also be used as a different kind of microcellular polymer, such as. B. microcellular nitrile rubber.
  • This anisotropic layer 06 or the anisotropic elevator 01 is now such that the main axes E1; E2 deliberately against the printing or transport direction T (or operational circumferential direction) by a defined angle, not equal to 0 ° or 90 ° (or not equal to 180 ° or 270 °) are inclined.
  • inclination angle ⁇ This is referred to below as “inclination angle” ⁇ , which has been defined for the following representations so that it is the acute angle between the direction of the larger “main axis” for the resulting from a deflection of the anisotropic layer 06 strain ⁇ 2 relative to the circumferential direction expresses.
  • the "principal axes" for the anisotropic elongation property can advantageously result from anisotropy in the modulus of elasticity E, in which case the directions of the principal axes for the elongation property coincide with those of the modulus of elasticity E, but their size is reciprocal to each other ,
  • the inclination angle ⁇ in this case is defined by the acute angle between the direction of the minor major axis for the elastic modulus E2 with the circumferential direction T.
  • ⁇ denotes the acute angle with respect to the smaller major axis for the elastic modulus E2 with respect to the circumferential direction T in the plane of the elevator 01st
  • the anisotropy is determined by the transverse contraction number ⁇ (Poisson's number) and / or achieved, so it is with the definition of the inclination angle ⁇ as with that the stretching property - it defines itself by the acute angle between the major axis for the Poisson number and the circumferential direction T.
  • the elevator 01 or the layer On the left and right bale half of the transfer cylinder 02 (in the longitudinal direction considered) the elevator 01 or the layer has opposite inclination angles ⁇ - particularly advantageous opposite equal large tilt angle ⁇ - mirror-symmetrical to the (paper) web center or to the cylinder center section, so that when Print the axial force component on the web 04 in the left half of the bale to the left, and to the right in the area of the right bale half. This will be a Tightening of the web 04 generated in the lateral direction and thus a wave or
  • FIG. 1 is sketched as a section of the nipple 03 between transfer cylinder 02 and web 04 (in particular paper web), wherein the radial forces occurring F r , and the tangential forces or stresses ⁇ u are shown schematically by arrows.
  • FIG. 2 shows a plan view of a cylinder 02 having the elevator 01 (or the layer) on the example of the anisotropy in the modulus of elasticity. Dashed line is a line of the nip 03 indicated.
  • ⁇ 1 ; ⁇ 2 represent the strains along the principal axis of anisotropy related to the strain.
  • a component of the strain in the axial direction ⁇ a thus occurs when E1 ⁇ E2 (mechanical anisotropy) and ⁇ ⁇ 0 ° and ⁇ ⁇ 90 ° (or ⁇ ⁇ 180 °, ⁇ ⁇ 270 °) (inclination).
  • an expression of the anisotropy of the layer (s) 06 so that in total for the effective layer 06 or layers 06 for the size of the major axes E1; E2: Young's modulus along the major axis E1 2 times, in particular 5 times or even 10 times, the modulus of elasticity along the smaller principal axis E2, ie 1 / E2 ⁇ 2 * 1 / E1, in particular 1 / E2 ⁇ 5 * 1 / E1 or even 1 / E2 ⁇ 10 * 1 / E1.
  • Another type of characteristic is, in particular for the case that the elevator 02 has a dimensionally stable support plate 11, to fix the anisotropic sum behavior on the printing surface.
  • an anisotropic overall effect can then be indicated on the surface, for example, as an effective modulus of elasticity E1 'or E2' in the region of the surface, in which case should at least apply 1 / E2 ' ⁇ 1.1 * 1 / E1', better 1 / E2 ' ⁇ 1.5 * 1 / E1'.
  • the elastic modulus E anisotropic elevator 01 is this (or is the effective layer 06 or the active layers 06) in such a way inclined relative to the longitudinal or circumferential direction of the elevator 01, that 1 ° ⁇ ⁇ 60 °, in particular 3 ° ⁇ ⁇ 45 °, holds, d. H. that the smaller main axis E2 is from 1 ° to 60 °, in particular inclined by 3 ° to 45 ° to the longitudinal or circumferential direction T of the elevator 01st runs.
  • Fig. 4 a shows this at two
  • Fig. 4 b) at four Elevators 01 schematically by suggesting the relation to the expansion larger Major axes in anisotropy with hatching.
  • the one-half side by side arranged elevators 01 of the same basic inclination direction ⁇ (left or right) can have slightly different inclination angles ⁇ from each other around the to be able to fine tune axial conveying behavior even more finely if necessary.
  • the set forth for several adjacent elevators 01 is on sections a continuous over the entire length releasable elevator 01 or a sleeve (Sleeve) (for example, Fig. 4 c) for two imaginary sections).
  • Such an elevator 01 can now be produced in such a way that after o.g. Roll the finite, rectangular elevator sections from the Rohbahn under the corresponding o. g. Inclination angle a (with respect to the modulus of elasticity E smaller) Main axis E2 be cut out or by introducing an anisotropic Material, in particular a fabric, in the production of the raw web under a o. g. Inclination angle ⁇ of the main axis E2 (with respect to the modulus of elasticity E smaller) opposite the later unwinding direction of the finished elevator 01 or lateral Cutting edge.
  • a tissue can also o. G. anisotropic property having reinforcing layer such as textile layer, hard elastomers or not woven, z. B.
  • sheet-like, layer of continuous or discontinuous fibers in be incorporated in the aforementioned manner in the elevator 01.
  • this can also be done in radial direction considered to be several of these layers, which in total (as a result) the o. g. Possess anisotropy.
  • the anisotropy in the properties of the material or the layer 04 of a same Elevator 01 or a section is not to be equated with in the axial direction of the Cylinder 02 varying material properties.
  • Set the varying substance properties a gradient in these properties, while said anisotropy a Characterization of a property represents.
  • the macroscopic sections of the axial varying material properties then have no in this respective axial section have the above-described angle of inclination ⁇ to the longitudinal or circumferential direction, but can be considered isotropically or with the circumferential direction parallel or be formed vertical axis.
  • a statement about anisotopy is not here met.

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  • Printing Plates And Materials Therefor (AREA)
EP20040104950 2003-10-08 2004-10-08 Blanchet pour un cylindre d'une machine à imprimer, corps rotatif. Expired - Lifetime EP1522408B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10347314 2003-10-08
DE10347314 2003-10-08
DE102004005893 2004-02-05
DE102004005893A DE102004005893B4 (de) 2003-10-08 2004-02-05 Aufzüge für einen Zylinder einer Druckmaschine, Satz von Aufzügen sowie Verfahren zu deren Herstellung

Publications (2)

Publication Number Publication Date
EP1522408A1 true EP1522408A1 (fr) 2005-04-13
EP1522408B1 EP1522408B1 (fr) 2009-08-26

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ID=34315015

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040104950 Expired - Lifetime EP1522408B1 (fr) 2003-10-08 2004-10-08 Blanchet pour un cylindre d'une machine à imprimer, corps rotatif.

Country Status (1)

Country Link
EP (1) EP1522408B1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE123384C (fr)
EP0594986A2 (fr) 1992-09-11 1994-05-04 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Blanchet d'impression tubulaire en caoutchouc
EP0631884A1 (fr) * 1993-05-04 1995-01-04 PT Sub, Inc. Elément sans fin anisotrope d'impression et procédé de fabrication dudit élément
EP1240452B1 (fr) 1999-10-18 2003-08-20 Stork Prints B.V. Cylindre a paroi mince en matieres plastiques renforcees de fibres

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE123384C (fr)
EP0594986A2 (fr) 1992-09-11 1994-05-04 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Blanchet d'impression tubulaire en caoutchouc
EP0631884A1 (fr) * 1993-05-04 1995-01-04 PT Sub, Inc. Elément sans fin anisotrope d'impression et procédé de fabrication dudit élément
EP1240452B1 (fr) 1999-10-18 2003-08-20 Stork Prints B.V. Cylindre a paroi mince en matieres plastiques renforcees de fibres

Also Published As

Publication number Publication date
EP1522408B1 (fr) 2009-08-26

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