EP1531046B1 - Support cylindrique recevant un manchon d'impression échangeable et procédé pour sa fabrication - Google Patents

Support cylindrique recevant un manchon d'impression échangeable et procédé pour sa fabrication Download PDF

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Publication number
EP1531046B1
EP1531046B1 EP04026661A EP04026661A EP1531046B1 EP 1531046 B1 EP1531046 B1 EP 1531046B1 EP 04026661 A EP04026661 A EP 04026661A EP 04026661 A EP04026661 A EP 04026661A EP 1531046 B1 EP1531046 B1 EP 1531046B1
Authority
EP
European Patent Office
Prior art keywords
carrier
pressure
core
jacket
pressure medium
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.)
Not-in-force
Application number
EP04026661A
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German (de)
English (en)
Other versions
EP1531046A1 (fr
Inventor
Hans-Georg Schepers
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.)
Schepers GmbH and Co KG
Original Assignee
Schepers GmbH and Co 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 Schepers GmbH and Co KG filed Critical Schepers GmbH and Co KG
Priority to PL04026661T priority Critical patent/PL1531046T3/pl
Publication of EP1531046A1 publication Critical patent/EP1531046A1/fr
Application granted granted Critical
Publication of EP1531046B1 publication Critical patent/EP1531046B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/10—Devices for attaching printing elements or formes to supports for attaching non-deformable curved printing formes to forme cylinders
    • B41F27/105—Devices for attaching printing elements or formes to supports for attaching non-deformable curved printing formes to forme cylinders for attaching cylindrical printing formes

Definitions

  • the present invention relates to a cylindrical carrier for receiving a replaceable by axial sliding and peeling hollow cylindrical pressure sleeve and a method for producing the carrier.
  • Carrier and printing sleeves of the type mentioned are known from practical use in the printing industry. It has been customary to make the pushing and removing the replaceable printing sleeves using a compressed air cushion.
  • the carrier has on its outer circumference a number of small holes which are fed from the interior of the carrier ago with compressed air.
  • the supplied compressed air forms when pushing or pulling the pressure sleeve, an air cushion between the outer periphery of the carrier and the inner circumference of the pressure sleeve.
  • the pushing or pulling can be done with a small force, because the compressed air cushion ensures a small, but sufficiently large expansion of the inner diameter of the pressure sleeve.
  • nickel sleeves are used here whose wall thickness is at most about 0.3 to 0.5 mm. This is very limited in the use and in the selection of printing sleeves.
  • such thin pressure sleeves are very sensitive to mechanical damage.
  • a carrier according to the preamble of claim 1 is in EP-A-0 736 382 or US-A-4,934,266 disclosed.
  • the task of creating a support of the type mentioned above which offers a greater freedom of choice with respect to the aufziehbaren pressure sleeves on this and can be combined with more stable and therefore insensitive sleeves.
  • a change of the printing sleeve should be possible both inside and outside a printing press.
  • a good concentricity of the printing cylinder-forming unit of carrier and sleeve should be ensured and a mutual rotation of the carrier and sleeve can be excluded in the printing operation.
  • a method for producing a suitable carrier is to be created.
  • the carrier the component whose outer diameter is changeable for the purpose of pushing on and off of printing sleeves.
  • the pressure sleeves which are to be used together with the carrier, need not be changeable in their inner diameter. This is advantageously achieved that pressure sleeves with a greater wall thickness and in particular with different wall thicknesses can be combined with a carrier.
  • a relatively large range of printing lengths that is to say, of printing sleeve outer circumferences, can be covered.
  • This offers the advantage for printers that they manage with a relatively small number of carriers, even if they use printing sleeves with many different print lengths, so outer peripheral lengths. The necessary investments for carriers can be greatly reduced in this way.
  • the different print lengths are then simply by correspondingly different thicknesses the sleeves at a few predetermined inner diameters, according to the existing carriers implemented.
  • the carrier according to the invention is at least as comfortable as the previously known carrier with compressed air cushion, so that in this respect no compromises must be made.
  • a mutual rotation of the carrier and pressure sleeve is securely excluded by the frictional engagement between the expanded carrier shell and the pressure sleeve, so that in this respect no problems in the operation of a printing press are to be feared.
  • the carrier jacket is connected between the two front ends along a plurality of circumferentially extending connecting lines with the carrier core, wherein the gap space is formed by a plurality of interconnected in the pressure medium permeable connection part-gap spaces.
  • the partial gap spaces are formed by running in the circumferential direction of the carrier core recesses, which are bounded by outwardly projecting, extending in the circumferential direction of the carrier core webs.
  • the carrier core and the carrier shell made of steel or aluminum and by Welds are connected together.
  • the embodiment of the carrier according to the invention provides that the carrier coat is provided on its outer circumference with an elastic coating.
  • This elastic coating on the outer circumference of the carrier shell provides for an increased frictional engagement between the outer periphery of the coating and the inner circumference of the pressure sleeve and for an improved compensation of deviations of the outer peripheral surface of the carrier from an ideal cylindrical shape. This ensures that deviations of the outer shape of the carrier shell from the cylindrical shape do not affect the outer peripheral surface of the pressure sleeve; Rather, the outer peripheral surface of the pressure sleeve remains completely cylindrical, even if the outer peripheral surface of the support jacket is not a perfect cylinder jacket surface. This ensures a high-quality print result.
  • the elastic coating is formed by a rubber coating or by a support made of polyurethane or silicone rubber.
  • the coatings mentioned provide the desired increased frictional engagement and, on the other hand, the desired balance of form, the materials being both sufficiently wear-resistant and durable and not requiring much effort for their processing.
  • the carrier is not too heavy, is further preferably provided that the carrier core is hollow cylindrical and at its end faces each have an inserted Stirnend Giant, each with a Lagerachsstummel and that at least one Stirnend schizophrenia a channel for Zuund / or discharge of the pressure medium is performed.
  • the channel or channels run concentrically through the Lagerachsstummel, whereby an imbalance is avoided even in a channel guide through the Lagerachsstummel.
  • a device for generating and / or changing the pressure of the pressure medium can be arranged in the carrier core, wherein the device can be actuated or switched from outside the carrier core.
  • This embodiment of the carrier offers the particular advantage that it requires no external devices for the generation, supply and discharge of pressure medium. Rather, all the means required for changing the pressure of the pressure medium in the gap space are integrated into the carrier. This makes the use of the carrier possible regardless of whether or not a suitable printing medium source is present in a printing operation.
  • the device is preferably a piston-cylinder arrangement accommodated in a front-end end piece or bearing stub axle of the carrier core.
  • This arrangement is designed so that by moving the piston of the piston-cylinder assembly in the gap a selectable pressure of the pressure medium can be adjusted without having to be fed or discharged from the outside pressure medium.
  • the piston is preferably displaceable by an adjusting tool that can be fed from the outside or by an adjusting device that can be shifted from the outside.
  • a feed opening suitable for this purpose is expediently formed concentrically with the relevant bearing stub axle or front end piece of the carrier core, in order to maintain a rotationally symmetrical structure of the carrier.
  • the pressure medium may be a gas, preferably air, or a liquid, preferably oil, or a viscous mass, preferably lubricating grease.
  • the method provides that a carrier core and a radially surrounding outer support jacket to form a loadable with a pressure medium gap space between the outer periphery of the carrier core and the inner circumference of the carrier shell are at least the front end sealed together and that is then processed at a pressure p1 of the pressure medium in the gap of the carrier jacket on its outer peripheral surface to a cylindrical shape, after which the carrier jacket at a pressure p0, which is smaller than the pressure p1, a radially inwardly deviating from the cylindrical shape, a low-force pushing and withdrawing a pressure sleeve gestattende form assumes its outer peripheral surface and at a pressure p2, which is higher than the pressure p1, an expanded, partially or fully against the inner periphery of a deferred pressure sleeve frictionally fitting shape of its outer peripheral surface assumes.
  • the carrier coat is processed at a pressure p1 of the pressure medium in the gap to a cylindrical shape, it is ensured that at the lower pressure p0 the outer circumference of the carrier shell due to the inherent elasticity occupies a radially inwardly deviating from the ideal cylindrical shape.
  • the support jacket is at least over the largest part of its outer peripheral surface in diameter smaller than the inner diameter of an associated pressure sleeve.
  • the further pressure increase no longer ensures a further expansion of the outer circumference of the carrier, but only for an increase in the contact pressure of the outer circumference of the carrier to the inner circumference of the sleeve, since the sleeve is not variable here in terms of their inner diameter.
  • the pressure p2 is suitably determined by tests and selected so high that a sufficiently secure frictional engagement between the carrier and the pressure sleeve is guaran teed, the mutual rotations during operation safely excludes the pressure cylinder formed by the carrier and printing sleeve in a printing press.
  • the pressure p0 may be, for example, the atmospheric air pressure or ambient pressure, whereby the generation of a vacuum, which would be associated with greater technical complexity, is not required.
  • the reduction of the outer diameter of the carrier is due to the elastic properties of the carrier shell without further aids, so that a total of a very simple, yet reliable construction without any joints or other wearing elements is achieved.
  • Figure 1 of the drawing shows partly in view, partly in a sectional view of a carrier 1, which carries a pressure sleeve 2, wherein the unit of carrier 1 and pressure sleeve 2 forms a pressure cylinder.
  • the carrier 1 consists of a hollow-cylindrical in its basic form carrier core 10, which is surrounded on the outside, leaving a gap 11 by a likewise hollow cylindrical carrier shell 12.
  • the carrier core 10 and the carrier shell 12 are sealed together. As a result, a closed gap 11 is formed.
  • the parts 10, 12 and 15 of the carrier 1 are made of metal, in particular steel or aluminum, which ensures the necessary stability and allows easy welding joints.
  • Lagerachsstummel 15 'and the associated front end 15 extends axially from the outside coming a bore 16 axially and concentrically toward the interior of the carrier 1, but ends before the hollow interior of the carrier 1 at a distance in front of the axially inner end face of the front end 15. From the inner end of the bore 16 extends a bore 16 'in the radial direction outwards into the gap space eleventh
  • a piston-cylinder unit 17 is housed in the axially inner end region of the bore 16.
  • This piston-cylinder unit 17 has an adjustable piston with which the pressure of a in the gap 11 and in the bore 16 'located pressure medium can be changed.
  • an adjusting screw 17 ' is provided, which in a not specifically shown Thread within the bore 16 is guided.
  • FIG. 2 shows a detail of the structure of the carrier 1 near its left end in FIG. At the lower left in FIG. 2, a part of the front end piece 15 with the bore 16 'running radially therein can be seen. The front end 15 is inserted rotationally in the hollow cylindrical carrier core 10.
  • the carrier core 10 has on its outer circumference a series of circumferential recesses in the circumferential direction, which are separated by circumferential ridges 13 from each other. In this way, a gap space 11 is formed, which is formed by a series of axially adjacent, separated by the webs 13 part-gap spaces 11 '.
  • the partial gap spaces 11 ' are mutually in a permeable to the pressure medium therein communication.
  • the support jacket 12 is connected along frontally and circumferentially extending welds 14, 14' tightly and firmly connected to the carrier core 10 ,
  • the carrier core 10 has a significantly higher material thickness than the carrier shell 12.
  • the carrier shell 12 has a smaller material thickness, which is dimensioned such that, in the case of a change the pressure of the pressure medium in the gap space 11 or in the partial gap spaces 11 'can cause a deformation of the outer peripheral surface 12' of the carrier shell 12.
  • the outer peripheral surface 12 'of the carrier shell 12 has a shape that deviates radially inwardly at least over partial areas from an ideal cylindrical shape. In this state of the carrier shell 12, the pressure sleeve 2 can be withdrawn with little effort in the axial direction of the carrier 1 or pushed onto the carrier 1.
  • the pressure sleeve 2 here has a relatively large thickness, which ensures that the pressure sleeve 2 has a fixed inner and outer diameter, which is not enlarged by forces exerted from the inside.
  • a secure frictional engagement between the outer peripheral surface 12 'of the support shell 12 and the inner peripheral surface 21 of the pressure sleeve 2 is effected, so that mutual rotations between the carrier 1 and the pressure sleeve 2 when used in a printing press can not occur.
  • the Carrier shell 12 With a reduction of the pressure of the pressure medium in the gap space 11 to the low pressure p0, the Carrier shell 12 due to its inherent elasticity back to a shape that has a smaller outer diameter, which then pulling off the pressure sleeve 2 and pushing on another pressure sleeve 2 is possible easily and with little effort.
  • the carrier corresponds in many parts to the carrier 1 according to FIG. 1 and FIG.
  • a rubber coating 18 on the outer peripheral surface 12 'of the carrier shell 12 is attached.
  • This rubber coating 18 has the purpose, on the one hand to achieve an improved frictional engagement between the outer peripheral surface of the rubber coating 18 and the inner peripheral surface 21 of the pressure sleeve 2 and on the other to provide a surface shape compensation, in the event that the outer peripheral surface 12 'of the support jacket 12 in its expanded Condition has a deviating from an ideal cylindrical shape surface shape.
  • These deviations in shape are then compensated by the rubber coating 18 or a similar elastic coating, so that there is no risk that shape deviations of the outer peripheral surface 12 'of the support shell 12 can propagate to the outer peripheral surface 20 of the pressure sleeve 2.
  • an absolutely cylindrical surface shape of the outer peripheral surface 20 of the printing sleeve 2 and thus a good printing result with high quality are guaranteed in each case.
  • the carrier 1 and the pressure sleeve 2 correspond to the exemplary embodiment according to FIGS. 1 and 2.
  • the carrier core 10 is provided with the Stirnend Partnersen 15 and the Lagerachsstummeln 15 '. If necessary, then the machining of the outer peripheral surface of the carrier core 10 to form the gap space 11 and the partial gap spaces 11 'can then take place. Subsequently, the carrier jacket 12 is pushed onto the carrier core 10 and then welded tightly to the carrier core 10 along the welds 14, 14 '(see FIG. 2 and FIG. 4).
  • the gap space 11 ' is filled with pressure medium under a pressure p1, wherein the pressure p1 is greater than the above-mentioned pressure p0 and smaller than the pressure p2 also mentioned above.
  • the carrier jacket 12 Due to the pressure p1, the carrier jacket 12, which is exposed to the outside in this processing step and in particular is not surrounded by a pressure sleeve 2, is expanded to a certain extent.
  • the support jacket 12 is machined on its outer circumferential surface 12 'to an exactly cylindrical shape, e.g. by a turning and / or grinding process.
  • the carrier shell 12 returns due to its own restoring force, whereby its outer peripheral surface 12 'assumes a surface shape which deviates radially inwardly from the previously assumed cylindrical shape , At least over most of the outer peripheral surface 12 'thus the diameter of the carrier 1 is reduced and the pressure sleeve 2 can be pushed with little effort in this state on the carrier 1 or withdrawn from the carrier 1 for the purpose of a sleeve change.

Landscapes

  • Printing Plates And Materials Therefor (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)

Claims (10)

  1. Support cylindrique (1) destiné à recevoir un manchon d'impression (2) cylindrique creux remplaçable par enfilement et retrait axiaux,
    le support (1) comprenant une âme de support (10) et une gaine de support (12) entourant celle-ci radialement extérieurement,
    la gaine de support (12) étant assemblée au moins côté extrémité frontale de manière étanche à l'âme de support (10),
    un interstice (11) pouvant être alimenté avec un agent de pression étant prévu entre le pourtour extérieur de l'âme de support (10) et le pourtour intérieur de la gaine de support (12),
    la gaine de support (12), étant donné une première pression p0 de l'agent de pression dans l'interstice (11), présente, au moins sur une partie de sa longueur axiale, une surface de pourtour extérieur (12') différant de la forme cylindrique radialement vers l'intérieur et permettant un enfilement et un retrait du manchon d'impression (2) nécessitant peu de forces et
    la gaine de support (12), étant donné une deuxième pression p2 plus élevée de l'agent de pression dans l'interstice (11), présente une surface de pourtour extérieur (12') dilatée qui s'applique par liaison par friction, sur une partie de la surface ou sur toute la surface, contre la surface de pourtour intérieur (21) d'un manchon d'impression (2) enfilé,
    caractérisé en ce que
    la gaine de support (12), sur sa surface de pourtour extérieur (12'), est pourvue d'un revêtement élastique (18).
  2. Support selon la revendication 1, caractérisé en ce que le revêtement élastique (18) est constitué par un caoutchoutage ou par une couche de caoutchouc de polyuréthane ou de caoutchouc de silicone.
  3. Support selon la revendication 1 ou 2, caractérisé en ce que la gaine de support (12) est assemblée à l'âme de support (10), entre les deux extrémités frontales du support (1), le long de plusieurs lignes d'assemblage (14, 14') dont le tracé suit le sens du pourtour, l'interstice (11) étant constitué par plusieurs interstices partiels (11') qui sont assemblés entre eux de manière perméable pour l'agent de pression.
  4. Support selon la revendication 3, caractérisé en ce que les interstices partiels (11') sont constitués par des creux dont le tracé suit le sens du pourtour de l'âme de support (10), lesquels sont limités par des nervures (13) en saillie vers l'extérieur dont le tracé suit le sens du pourtour de l'âme de support (10).
  5. Support selon l'une des revendications précédentes, caractérisé en ce que l'âme de support (10) et la gaine de support (12) se composent d'acier ou d'aluminium et sont assemblées entre elles par des soudures.
  6. Support selon l'une des revendications précédentes, caractérisé en ce que l'âme de support (10) est cylindrique creuse et comporte, sur ses côtés frontaux, respectivement une pièce terminale frontale rapportée (15) avec respectivement un tourillon de palier (15') et en ce qu'un canal (16, 16') d'amenée et/ou d'évacuation de l'agent de pression passe par au moins une pièce terminale frontale (15).
  7. Support selon l'une des revendications précédentes, caractérisé en ce qu'est situé, dans l'âme de support (10), un dispositif (17, 17') pour générer et/ou modifier la pression de l'agent de pression, le dispositif étant actionnable ou commandable depuis l'extérieur de l'âme de support (10).
  8. Support selon la revendication 7, caractérisé en ce que le dispositif (17, 17') est un ensemble piston cylindre logé dans une pièce terminale frontale (15) côté extrémité frontale ou un tourillon de palier (15') de l'âme de support (10).
  9. Support selon la revendication 8, caractérisé en ce que le piston du dispositif (17, 17') est déplaçable par un outil de réglage amenable de l'extérieur ou par un dispositif de réglage commandable de l'extérieur.
  10. Support selon l'une des revendications précédentes, caractérisé en ce que l'agent de pression est un gaz, de préférence de l'air, ou un liquide, de préférence de l'huile, ou une masse visqueuse, de préférence de la graisse lubrifiante.
EP04026661A 2003-11-12 2004-11-10 Support cylindrique recevant un manchon d'impression échangeable et procédé pour sa fabrication Not-in-force EP1531046B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL04026661T PL1531046T3 (pl) 2003-11-12 2004-11-10 Cylindryczny dźwigar do osadzania wymiennej tulei drukowej i sposób wytwarzania dźwigara

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10352817 2003-11-12
DE10352817A DE10352817A1 (de) 2003-11-12 2003-11-12 Zylindrischer Träger für die Aufnahme einer auswechselbaren Druckhülse und Verfahren zur Herstellung des Trägers

Publications (2)

Publication Number Publication Date
EP1531046A1 EP1531046A1 (fr) 2005-05-18
EP1531046B1 true EP1531046B1 (fr) 2008-01-02

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ID=34428691

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04026661A Not-in-force EP1531046B1 (fr) 2003-11-12 2004-11-10 Support cylindrique recevant un manchon d'impression échangeable et procédé pour sa fabrication

Country Status (5)

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EP (1) EP1531046B1 (fr)
AT (1) ATE382480T1 (fr)
DE (2) DE10352817A1 (fr)
ES (1) ES2298667T3 (fr)
PL (1) PL1531046T3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110216976A (zh) * 2019-07-16 2019-09-10 深圳市兴博防伪技术开发有限公司 一种胶辊

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1297413B (de) * 1965-12-09 1969-06-12 Saueressig Kg Geb Walze mit drehfest an einen Walzenkern angeschlossenem Mantel
IT1222651B (it) * 1987-09-11 1990-09-05 Cerutti Spa Off Mec Cilindro di stampa per macchine da stampa rotative
IT1277167B1 (it) * 1995-03-20 1997-11-05 Rossini Erminio Spa Perfezionamenti ai mandrini deformabili per cilindri da stampa rotativa
US6161478A (en) * 1999-11-02 2000-12-19 The Holdrite Co., Inc. Printing cylinder assembly

Also Published As

Publication number Publication date
ES2298667T3 (es) 2008-05-16
ATE382480T1 (de) 2008-01-15
PL1531046T3 (pl) 2008-06-30
DE502004005815D1 (de) 2008-02-14
EP1531046A1 (fr) 2005-05-18
DE10352817A1 (de) 2005-06-23

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