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
  • B41F27/14—Devices for attaching printing elements or formes to supports for attaching printing formes to intermediate supports, e.g. adapter members
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
  • B41C1/00—Forme preparation
  • B41C1/18—Curved printing formes or printing cylinders
  • B41C1/182—Sleeves; Endless belts
• • 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
  • B41N6/00—Mounting boards; Sleeves Make-ready devices, e.g. underlays, overlays; Attaching by chemical means, e.g. vulcanising
• • 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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
  • B41P2227/00—Mounting or handling printing plates; Forming printing surfaces in situ
  • B41P2227/20—Means enabling or facilitating exchange of tubular printing or impression members, e.g. printing sleeves, blankets

Definitions

• the invention relates to a sleeve for mounting on support cylinders of printing presses, with two flange rings at the ends of the sleeve, on which a cylindrical outer sleeve wall and an inner sleeve wall are supported at a distance from one another.
• the invention particularly relates to so-called adapter sleeves for printing presses.
• the support cylinders are often designed as air cylinders, onto which adapter sleeves or working sleeves can be slid axially or removed from them according to the Beerkissenp ⁇ nzip.
• the adapter or working sleeve With the compressed air system of the support cylinder, the adapter or working sleeve is expanded for assembly or disassembly, so that it is held in a rotationally fixed manner on the support cylinder during the printing process.
• the respective working sleeves which are to be mounted on a supporting cylinder with a given diameter, have excessively large wall thicknesses, which would increase the procurement costs for the working sleeves and would reduce the print quality that can be achieved with the working sleeves.
• Adapter sleeves that can be adapted to the structure and dimensions of support rollers in a comparatively simple manner and with which comparatively good printing quality can be achieved are known, for example, from DE 20012929 U1.
• the adapter sleeves in this case comprise two mcompressible sleeve elements arranged at the ends of the adapter sleeve, the inside diameter of which with a clearance or transition fit is larger than the outside diameter of the support cylinder.
• the inner and outer sleeve walls are fastened in such a way that the inner sleeve wall is in the assembled state at a distance from the outer wall of the support cylinder by the thickness of radially extending sleeve sections, both sleeve elements being provided on the end side with collar sections, on the outer surface of which the outer sleeve wall rests.
• the outer sleeve wall can consist of a fiber-reinforced plastic material. Alternatively, the outer sleeve wall can also consist of an aluminum tube or another rigid material.
• transition or press fit between the two incompressible socket elements or flange rings and the outer wall of the support cylinder can be achieved by utilizing the temperature expansion coefficient of the material used for this during assembly, by hydraulic or pneumatic clamping elements or by using piezoceramics.
• No. 4,794,858 shows an adapter sleeve with two end flange rings and only one outer sleeve jacket, the chamber between the two flange rings, which is open to the jacket surface of the support cylinder, being used to transmit the compressed air system of the support cylinder.
• the sleeve is attached to the support cylinder in a rotationally fixed manner by means of hydraulic clamping elements assigned to the support cylinder.
• EP 683046B1 discloses a sleeve for mounting on carrier cylinders of flexographic printing presses, in which the outer sleeve wall is spaced from the inner sleeve wall by two flange rings to form a chamber which is sealed off from the outside, the inner sleeve wall being elastically deformable at least in a partial area and by pressing the chamber with a suitable fluid against the outer jacket of the pressure cylinder.
• the entire sleeve can be made of a composite material.
• EP 1025996B1 shows a sleeve with an outer jacket made of a carbon fiber composite material with a wound framework made of carbon fibers, the winding being carried out in such a way that the sleeve is self-supporting over the entire sleeve length and two disks arranged in the region of both ends are sufficient to space the sleeve consisting of the carbon fiber winding from the support cylinder.
• the winding of the carbon fibers must therefore give the sleeve such a high degree of inherent rigidity that the sleeve can withstand all the radial forces that occur during printing over the entire sleeve length, ie the distance between the two disks.
• the wall thickness of the sleeve provided with the carbon fiber winding is up to 20 mm.
• the object of the invention is to provide a sleeve for printing machines, in particular an adapter sleeve, which can be easily assembled or disassembled on support cylinders, which can be produced inexpensively and which enables extremely high printing qualities with a comparatively low weight.
• the outer sleeve wall consists of a fiber composite material with at least one layer of a carbon fiber fabric, and that at least one support ring is provided between the two flange rings to support the outer sleeve wall with respect to the inner sleeve wall.
• the use of carbon fiber scrims instead of a carbon fiber winding leads to a considerable reduction in the manufacturing costs for the outer sleeve wall, since corresponding carbon fiber scrims, in particular carbon fiber scrims with a unidirectional arrangement of all carbon fibers, can be purchased pre-fabricated and further processed.
• the arrangement of at least one, preferably a plurality of support rings between the two flange rings allows the sleeve to have a high degree of inherent rigidity over its length with an extremely low weight and, in particular, an extremely thin thickness become.
• the additional support rings increase the total weight of the sleeve, but because of the thinner necessary thickness of the outer sleeve wall, this results in a surprisingly high print quality in use, with the overall weight of the sleeve remaining low, that with "self-supporting" outer sleeve walls are supported only at the ends, cannot be achieved.
• a plurality of support rings are arranged or formed between the two flange rings.
• the number of support rings depends largely on the number of layers of carbon fibers or carbon fiber layers in the fiber composite material and the fiber orientation of the respective layers.
• at least one carbon fiber fabric is provided, in which the fiber orientation of the carbon fibers is 90 ° relative to the sleeve axis or support cylinder axis. This orientation results in optimal strength properties for the radial forces to be absorbed during the printing process. More preferably, several layers of preferably unidirectional carbon fiber fabrics, in particular about 8 to 15 layers of carbon fiber fabrics, are provided.
• the rigidity of the outer sleeve wall can be further increased if the fiber orientation of the carbon fibers of at least one layer of a carbon fiber fabric is 45 ° relative to the sleeve axis.
• the carrier fibers of the carbon fiber scrim can in principle have no or only a low strength property and can consist, for example, of a textile material such as sewing thread.
• the carrier fiber of the carbon fiber scrim also has sufficiently high strength properties, it being possible for the carrier fiber to consist in particular of a glass fiber.
• the outer sleeve wall therefore consists of a glass fiber / carbon fiber laid hybrid.
• the carbon fibers are bundled in the carbon fiber scrim. are arranged and the bundles are positioned relative to each other by means of the carrier fiber.
• Each preferably flat, strip-shaped bundle of carbon fibers then comprises a large number of individual filaments.
• the outer sleeve wall can also consist of scrims with carbon fibers and glass fibers, whereby the scrims can then be arranged with changing fiber orientations.
• a winding with an endless carbon fiber enclosing the carbon fiber scrim or the carbon scrim can be provided in order to increase the inherent rigidity of the outer sleeve wall, or bidirectional carbon fiber scrims are used.
• the matrix in the fiber composite material, in which the carbon fibers and, if appropriate, the further reinforcing fibers are embedded preferably consists of an ester, in particular a vinyl ester. Alternatively, a polyester or epoxy resin could also be used.
• the fibers in the scrims used according to the invention can lie in a stretched form in one plane and can be fixed to one another by several knitting threads.
• the scrims can also consist of several different raw materials and / or several layers that are designed differently in terms of orientation and basis weight.
• the carrier fibers which fix the fibers of the main orientation direction together with the knitting threads can also consist of polymer threads, glass fiber rovings or plastic fiber rovings.
• the outer sleeve surface is preferably formed by a functional surface, the functional surface consisting in particular of a coating with a metal such as steel, aluminum, nickel, chromium or copper, an elastomer or the like.
• the functional surface is electrically conductive, at least one discharge element for discharging electrostatic charges being arranged in one of the flange rings, which in the assembled state has the functional surface connects surface with the carrier cylinder.
• the diverting element can consist, for example, of a pressure body pretensioned by means of a compression spring, all functional parts of the diverting element being electrically conductive.
• the two flange rings have an end-side outer flange collar which protrudes in an annular manner over an outer surface area of the flange ring, on which surface area the outer sleeve wall is supported, and which delimits the outer sleeve wall on the end face. It is particularly advantageous if the two flange rings also have an end-side inner flange collar, each inner flange collar projecting annularly over an inner wall surface of the flange ring, on which wall surface the inner sleeve wall is supported, and delimits the inner sleeve wall on the end face. Both measures favor the assembly of the flange rings, support rings and the two sleeve walls.
• the flange rings is provided with a bore system for the compressed air system of the support cylinder.
• the bore system in the flange ring preferably comprises at least one radial bore with an opening on the outer wall of the sleeve, further preferably the bore system can have at least one axial bore which is connected to a feed channel opening into a radial bore in at least one of the support rings.
• the axial bore of the bore system in the flange ring can be connected to the feed channel in the support ring, in particular via a conduit.
• the feed channels are preferred different support rings connected to each other by further conduit pipes.
• this comprises, in the particularly preferred embodiment, a spur line to the inner sleeve wall, which is provided with a circumferential groove on the inside into which the spur line opens.
• FIG. 1 In the single figure, cut in the lower half, shows an adapter sleeve 10 mounted on a support cylinder, designated overall by 1.
• the support cylinder 1 comprises at both ends a bearing journal 2 or 3, with which the support cylinder 1 can be stored in a printing machine, not shown.
• a compressed air connection 4 is formed with an air duct 5 which opens into an air duct 6 arranged here centrally on the support roller or sleeve axis A in the support cylinder 1.
• the air channel 6 extends axially at least to the level of a transverse channel 7 in the support cylinder 1, which extends up to the circumferential surface 8 of the support cylinder 1.
• Support cylinders of this type designed for printing machines are known in the prior art, so that a further explanation need not be given here.
• the adapter sleeve 10 comprises at the ends a first flange ring 11 and a second flange ring 12, on which an inner sleeve wall 20 and an outer sleeve wall 30 are fixed and supported at a distance from one another.
• the adapter sleeve 10 essentially consists of the two flange rings 11, 12 arranged at the ends, the two sleeve walls 20, 30 and a plurality of support rings 40 and 40A.
• Both flange rings 11, 12 can preferably consist of comparatively dimensionally stable plastic.
• Both flange rings 11, 12 each comprise an annular web 13 or 14, which extends parallel to the sleeve axis A over several centimeters, and an outer flange collar 17 or 18 at the outer outer surface 15 'or 14' of the outer outer surface 15 'or 14' thereof survives.
• the outer sleeve wall 20 is supported directly on the outer circumferential surface 13 'and 14' of the web extensions 13, 14 of the two flange rings 11, 12 and is fastened to them in a rotationally fixed manner, for example glued to them.
• the two flange collars 17 and 18 lie against the end of the outer sleeve wall 14 and extend to the outer surface thereof.
• the inner sleeve wall 30 lies on inner lateral surfaces 13 ′′ or 14 ′′ of the web extensions 13, 14, an inner flange collar 17A or 18A also projecting radially inwards as an annular web beyond the inner lateral surfaces 13 ′′, 14 ′′, so that the inner sleeve wall 30, when the flange rings 11, 12 are mounted, is also delimited at the end by the inner flange collars 17A and 18A.
• the support rings 40, 40A are preferably arranged at a constant distance from one another and to the flange rings 11, 12 over the length and the support rings 40, 40A can in particular consist of a dimensionally stable plastic material.
• the support rings 40, 40A can also consist of preformed disks or can be foamed between the two sleeve walls 20, 30.
• the inner sleeve wall 30 can consist of a thin-walled tube made of metal or preferably of an elastically deformable synthetic material.
• the outer sleeve wall 20 consists of a fiber composite material with a plurality of reinforcement layers of a unidirectional carbon fiber scrim 21 with carbon fibers, which are arranged in bundles 22, the fiber orientation of the individual carbon fibers, as shown in the broken section of the sleeve 10, being oriented perpendicular to the sleeve axis A in at least one layer, so that the individual carbon fibers of the bundles 22 in the carbon fiber Layers 21 are arranged in the outer sleeve wall 20 in the manner of stiffening rings.
• the outer sleeve wall 20 is designed, in particular, as a carbon-glass fiber hybrid, with glass fibers 23 being embedded in the plastic matrix, which consists, for example, of vinyl ester, in addition to the carbon fiber fabric or fabrics 21.
• the glass fibers 23 can, as in the schematically shown exemplary embodiment, be embedded unidirectionally in a glass fiber fabric 24, which encloses the layers of carbon fiber fabrics 21, or the glass fibers form the carrier fiber for the carbon fiber fabric 21.
• the fiber orientation of the glass fibers is preferably perpendicular the carbon fiber bundles 22 in the carbon fiber fabric 21 and therefore parallel to the sleeve axis A.
• the outer sleeve wall 20 preferably comprises up to ten layers of a carbon fiber fabric 21, and in some layers the fiber orientation can also be 45 ° to the sleeve axis A.
• the number of layers of carbon fiber fabrics 21 and glass fiber fabrics 24 and the thickness of the outer sleeve wall 20 are selected such that the outer sleeve wall 20 would bend under the radial forces that are usually present during the printing process if the outer sleeve wall 20 between the two flange rings 11 , 12 would not be supported by the additional support rings 40, 40A.
• the number of support rings 40, 40A is therefore determined by the length of the adapter sleeve 10 and the diameter and structure of the outer sleeve wall 20.
• the adapter sleeve 10 is provided on the outer surface with a functional surface 25 which extends over the entire length of the sleeve 10 and both the outer wall of the outer sleeve wall 20 and the outer surface of the two flange collars 17, 18th to the flange wrestle 11, 12 covered.
• the functional surface 25 consists of a coating with metal or an elastomer.
• a deflection element 60 is preferably arranged in one of the flange rings, here in the flange ring 12, which is arranged in a radial bore 61 and extends from the functional surface 25 to beyond the inner sleeve wall 30.
• the diverting element 60 comprises a sleeve with an electrically conductive bottom piece 62 on which a spring 63 is supported, with which a pressure body, preferably a ball 64, is pressed through an opening in the inner sleeve wall 30 against the peripheral surface 8 of the support cylinder 1 is, so that permanent electrical contact between the functional surface 25 of the adapter sleeve 10 and the peripheral surface 8 of the support cylinder 1 is guaranteed.
• a plurality of discharge elements 60 can be distributed over the circumference or distributed over the flange rings.
• the sleeve is provided with an air guide system which, in the exemplary embodiment shown, comprises an axial bore 71 and a spur line 72 in the flange ring 11, the spur line 72 in a circumferential groove 31 on the inside of the inner sleeve wall 30 opens, which is in the assembled state of the adapter sleeve 10 on the support cylinder 1 of the transverse bore 7 in the support cylinder 1 directly opposite.
• the compressed air introduced into the carrying cylinder 1 via the compressed air connection 4 can be introduced into the air guidance system in the adapter sleeve 10.
• a plurality of circumferentially distributed outlet openings 76 are provided at the level of the flange ring 12, wherein in the region of the outlet openings 76 a threaded screw 78 provided with a through hole can be screwed through the outer sleeve wall 20 into the web section 14 of the flange ring 12.
• Further outlet openings 77 can also be arranged in the region of one or more support rings 40, in which case a radial bore 79 branches off from an axial air duct 81 in the associated support ring 40 and a threaded screw 78 provided with a passage is screwed through the sleeve wall 20 into the support ring 40 ,
• the adapter sleeve 10 is provided with a so-called register pin 35 at the opposite end.
• the support cylinder is not designed as a compressed air cylinder, a compressed air connection can also be provided directly in one of the flange rings. If the working sleeve is assembled from the side of the pressure cylinder compressed air connection, it may be sufficient if only the adjacent flange ring and the first support ring adjacent to it are provided with an air guide system. The arrangement and number of carbon fiber fabrics can be adapted to the pressure forces to be expected and the number of support rings.
• the adapter sleeve 10 can be connected in a rotationally fixed manner to the support cylinder according to the air cushion principle or by other suitable means.
• the inner sleeve wall can be compressible or the inner sleeve wall is elastic and further grooves are arranged in the area of the support rings, whereby these inner grooves have a diameter that is matched to the outer diameter of the support cylinder with clearance.

Landscapes

• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Rolls And Other Rotary Bodies (AREA)
• Printing Plates And Materials Therefor (AREA)
• Rotary Presses (AREA)
• Soil Working Implements (AREA)

Applications Claiming Priority (2)

Publications (3)

Family

ID=33395215

Family Applications (1)

Country Status (6)

Families Citing this family (11)

Family Cites Families (12)

• 2004
  • 2004-03-18 DE DE202004004375U patent/DE202004004375U1/de not_active Expired - Lifetime
• 2005
  • 2005-03-18 EP EP05716211A patent/EP1725403B8/fr active Active
  • 2005-03-18 CA CA2558878A patent/CA2558878C/fr active Active
  • 2005-03-18 DE DE502005010511T patent/DE502005010511D1/de active Active
  • 2005-03-18 US US10/592,987 patent/US20070144381A1/en not_active Abandoned
  • 2005-03-18 AT AT05716211T patent/ATE487595T1/de active
  • 2005-03-18 WO PCT/EP2005/002923 patent/WO2005090075A2/fr active Application Filing

Non-Patent Citations (1)

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