EP2907662B1 - Module d'une machine de traitement de matière d'impression en forme de bande ou feuilles - Google Patents

Module d'une machine de traitement de matière d'impression en forme de bande ou feuilles Download PDF

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Publication number
EP2907662B1
EP2907662B1 EP15151732.3A EP15151732A EP2907662B1 EP 2907662 B1 EP2907662 B1 EP 2907662B1 EP 15151732 A EP15151732 A EP 15151732A EP 2907662 B1 EP2907662 B1 EP 2907662B1
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EP
European Patent Office
Prior art keywords
roller
functional polymer
actuators
cylinder
transfer
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.)
Active
Application number
EP15151732.3A
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German (de)
English (en)
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EP2907662A1 (fr
Inventor
Dieter Schaffrath
Wolfram Kolbe
Gerald Hauptmann
Volker Moser
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
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Publication of EP2907662A1 publication Critical patent/EP2907662A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/44—Cutters therefor; Dies therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
    • B26D7/2628—Means for adjusting the position of the cutting member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/02—Conveying or guiding webs through presses or machines
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F19/00—Apparatus or machines for carrying out printing operations combined with other operations
    • B41F19/008—Apparatus or machines for carrying out printing operations combined with other operations with means for stamping or cutting out
    • 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
    • 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
    • B41N7/00—Shells for rollers of printing machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/44—Cutters therefor; Dies therefor
    • B26F2001/4409—Cutters therefor; Dies therefor having die balancing or compensating means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/44—Cutters therefor; Dies therefor
    • B26F2001/4463—Methods and devices for rule setting, fixation, preparing cutting dies
    • 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
    • B41N10/00—Blankets or like coverings; Coverings for wipers for intaglio printing
    • 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
    • B41N10/00—Blankets or like coverings; Coverings for wipers for intaglio printing
    • B41N10/02—Blanket structure
    • B41N10/04—Blanket structure multi-layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
    • B44B5/00—Machines or apparatus for embossing decorations or marks, e.g. embossing coins
    • B44B5/02—Dies; Accessories
    • B44B5/026—Dies

Definitions

  • the present invention relates to an assembly of an arcuate or web-shaped printing material processing machine. These machines include printing machines and finishing machines. With further processing machines, the printed sheets or printed webs are processed further after printing.
  • EP 2 045 078 A2 describes a printing machine with a printing form and a roller.
  • a polymer cellular electret film is arranged under the printing form.
  • the roller is adjusted to the printing forme with an electric drive until the voltage equivalent emitted by the electret film or a parameter derived therefrom corresponds to a predetermined target value.
  • a known flat bed die cutter which is used for punching, breaking out, embossing and depositing sheets of paper, cardboard and the like is, for example, from US Pat DE 30 44 083 A1 known.
  • the two tables are equipped with cutting and creasing tools or corresponding counter-tools, with which the panels are punched out of the arches guided intermittently between the table surface and at the same time the creases necessary for neat folding are pressed.
  • the waste is removed automatically using stripping tools.
  • the punched copies can be separated in a depaneling device provided for this purpose.
  • the punch pressure in the sheet punching and embossing machine must be able to be adjusted depending on the sheet to be processed.
  • the various devices for setting the punching force according to the prior art have in common that the punching force can only be set globally, i.e. based on the entire surface of the crucible. Due to the design, however, all punching and embossing machines according to the state of the art have an unequal distribution of punching force over the surface of the crucible.
  • the punching force is introduced via individual force introduction points and is therefore not applied to the entire surface of the crucible.
  • there is a deformation of the upper and lower table which in turn results in an unequal distribution of the punching pressure over the surface of the crucible.
  • this problem is solved in that the punching knives are individually underlaid. Depending on the deviation from the nominal punching force, the punching knives are stuck behind the back of the tool with strips of paper or plastic of different thicknesses. This so-called dressing is very time-consuming and has to be done when the machine is at a standstill. Depending on the number of punching knives and the shape to be punched, the preparation can take several hours. The long set-up time results in low machine productivity.
  • the document also discloses DE 10 2008 018 590 A1 an assembly of a sheet or web-shaped printing material processing machine comprising a piezoelectric functional material for changing the diameter of the assembly, wherein the assembly has several zones in which the functional material is located, and the zones are stack actuators which are arranged in axial alignment with one another or wherein the assembly comprises a roller with a roller core, stack actuators on top and a rubber cover (sleeve) on top. When a voltage is applied to the stack actuators, the diameter is reduced.
  • the present invention is based on the object of creating a versatile assembly.
  • the assembly according to the invention of a sheet or web-shaped printing material processing machine comprises a functional polymer - a so-called smart polymer - for changing a property of a component of the assembly.
  • the functional polymer is also referred to in English as functional polymer or smart polymer or stimuli-responsive polymer.
  • the assembly according to the invention is versatile can be used, for example, in printing machines or in further processing machines, for example punching or embossing machines.
  • the property of the component that can be changed by the functional polymer is at least one of the following properties: the elastic hardness of the component, the compressibility of the component, the resilience of the component, the coefficient of friction of the component, the thickness of the component or the diameter of the component.
  • the component is a printing machine cylinder, a printing machine roller, a printing machine cylinder cylinder elevator, a printing machine roller roller cover, a coating film guide roller, a printing material punching tool or a printing material embossing tool.
  • the functional polymer is a magnetically active polymer, an electrically active polymer or a dielectric elastomer.
  • the component has several zones in which the functional polymer is located, and the zones can be individually controlled.
  • the zones are designed as ring segments.
  • the ring segments are arranged in axial alignment with one another and can be controlled in such a way that a roller crown or a cylinder crown results.
  • the assembly comprises a roller with a roller core, actuators and a rubber cover.
  • the actuators are ring-shaped (so-called ring actuators) and are arranged on the roller core.
  • the rubber cover can consist of a rubber-elastic plastic and is arranged on the ring actuators.
  • the ring actuators each include an inner electrode, an outer electrode and a elastic dielectric (dielectric elastomer). The dielectric is arranged between the inner electrode and the outer electrode, seen in the radial direction.
  • the assembly also includes a roller with a roller core, actuators and a rubber cover.
  • the actuators are ring actuators and are arranged on the roller core.
  • the rubber cover can also consist of a rubber-elastic plastic and is arranged on the ring actuators.
  • the ring actuators each include two outer electrodes and an elastic dielectric, which is arranged between the two electrodes, seen in the axial direction.
  • the actuators with the dielectric elastomer are referred to in English as "dielectric elastomer actuators" (DEA).
  • the component can be a rubber blanket for offset printing.
  • the hardness of the elastic cover layer of the rubber blanket can be varied with the functional polymer.
  • the hardness can be set depending on the substrate that is being printed with the rubber blanket. Different rubber blanket hardnesses can be set for different printing materials. This has the advantage that multiple different rubber blankets are no longer required for the different printing materials, but only one and the same universal rubber blanket. In this way, the blanket supply and the storage space provided for it can be minimized.
  • An additional advantage is the elimination of set-up times that would otherwise be required to change the blankets between print jobs with different substrates.
  • the hardness of the blanket can be varied by placing a field on the functional polymer. The field can be varied in terms of its strength and / or frequency and applied in a pulsed manner.
  • the field is applied to the functional polymer at the location of the desired change in properties; in the case of the rubber blanket, this is the printing gap.
  • EAP electro-active polymer
  • MAP magnetoactive Polymers
  • Different substrates require different surface pressures between blanket and substrate in the printing gap and different contact strip widths - this means the flattening of the blanket in the printing gap.
  • the functional polymer can be used to change the elastic hardness of the rubber blanket and, moreover, the surface pressure and the contact strip width, with a given contact pressure of the pressure of the rubber blanket on the printing material.
  • the elastic hardness of the rubber blanket and the surface pressure can be changed for a given "theoretical body penetration" (delivery of the blanket cylinder with the blanket to the impression cylinder with the printing material and the resulting indentation depth).
  • the functional polymer not only can the contact strip width and surface pressure between the blanket and printing material be changed, but also between the blanket and the cleaning roller. If the blanket is not on the blanket cylinder (offset cylinder) but on an inking roller (e.g. an anilox printing unit), the control of the functional polymer with the field can control the contact strip width and / or surface pressure in the roller gap between the inking roller and the printing forme cylinder and / or between Inking roller and anilox roller can be set.
  • a plurality of flat electrodes that can be contacted separately from one another can also be arranged on one or both sides of the EAP layer.
  • the elastic EAP layer can, however, also be contacted by the electrodes on the end faces of the rubber blanket. It is either a local electrode contact or an electrode contact over the entire length of the rubber blanket or over the entire circumference of the cylinder or the roller on which the rubber blanket is located is possible.
  • the local electrode contact can be a fixed contact or a sliding contact. If the uppermost layer of the rubber blanket is formed by the EAP layer, this can be contacted on its upper side by a body that is in mechanical contact with this upper side and is sufficiently electrically conductive, the so-called counterpart, and on its lower side by an integrated into the rubber blanket Surface electrode are contacted. Even in the variant with the electrode contact on the end faces, several electrodes that can be contacted separately from one another can be arranged.
  • the magnetic field that penetrates the MAP layer can be applied to it without contact.
  • Soft magnetic material can be arranged on both sides of the MAP layer, either in close proximity to the MAP layer or in contact with the MAP layer.
  • the soft magnetic material acts according to the pole shoe principle as an amplifier of the magnetic field.
  • a permanent magnetic layer and a coil through which the electrical current flows are used.
  • the permanent magnetic layer is arranged on one side and the coil is arranged on the other side of the cylinder gap, for example a pressure gap or a roller gap.
  • the two sides of the gap mean the two sides which are spaced apart from one another in the radial direction.
  • the permanent magnetic layer can be on the side of the blanket cylinder and the coil on the side of the impression cylinder which, together with the blanket cylinder, forms the printing gap.
  • Another possibility is the arrangement of a pair of coils that includes the cylinder gap or roller gap.
  • the pair of coils preferably forms a Helmholtz coil for generating a homogeneous magnetic field. If the two cylinders or rollers, which together form the gap in the area of which the elastic hardness is to be changed, have the same diameter, a considerable magnetic field can be generated with a single coil to activate the MAP material.
  • the two cylinders or rollers of the same diameter can be, for example, the inking roller and the anilox roller, or it can be, for example, the rubber blanket cylinder and the printing form cylinder, or it can be, for example act the blanket cylinder and the impression cylinder.
  • the arrangement variants explained in connection with the use of the EAP material - here for the arrangement of the electrodes and for contacting - also apply in a figurative sense to the use of the MAP material.
  • the electrically conductive electrode material used when using the EAP material must be replaced by soft magnetic material when using the MAP material. For example, on the two opposite sides of the MAP layer, soft magnetic particles can be introduced into this in high concentration.
  • the printing machine cylinder-cylinder elevator or printing machine roller-roller cover forming the component whose property is changed with the functional polymer does not necessarily have to form the peripheral surface of the assembly - here the cylinder or roller - that transfers the printing ink, as in the case of the rubber blanket, but can be a pad or mat, which is arranged on the cylinder or the roller under the cylinder cover or the roller cover, which forms the ink-transferring peripheral surface.
  • the functional polymer can be part of a rubber blanket underlay which is arranged under a rubber blanket. In the case of the underlay, it contains the functional polymer, e.g. the EAP material or the MAP material, and this changes the elastic hardness of the underlay.
  • the outer cylinder cover or roller cover which is subject to wear, is separate from the underlying base and can be replaced when the wear limit is reached, without also having to replace the base and thus the functional polymer.
  • the functional polymer underlay arranged on the cylinder under the worn rubber blanket can remain on the cylinder.
  • the use of one and the same functional polymer underlay for many blankets without functional polymer reduces the costs of spare parts and operating costs.
  • the change can relate to a change in the compressibility of the component by activating the functional polymer with which the component is equipped.
  • the component can be what has already been mentioned Trade transfer cloth or rubber blanket.
  • This rubber blanket can have a compression layer made of a foamed polymer, the foamed polymer being a foamed functional polymer.
  • the foamed functional polymer can be a foamed EAP or a foamed MAP.
  • the compression layer containing the foamed functional polymer can be part of a base under the cylinder cover or roller cover, which in this case does not need to contain a compression layer with functional polymer.
  • the underlay forms the component whose compressibility can be varied by means of the functional polymer.
  • a rubber blanket can have a compression layer without a functional polymer and the base arranged under this rubber blanket on the cylinder can have a compression layer with foamed functional polymer.
  • a development of the variation in compressibility can be given, for example, when the machine processing the printing material is configured as an electrophotographically operating machine.
  • Such an electrophotographically operating machine has a transfer cylinder which receives the print image in a first transfer nip and delivers it to the printing material in a second transfer nip.
  • the transfer of the print image in the first transfer nip to the transfer cylinder takes place with the support of an electric field.
  • the transfer cylinder can be covered with a transfer cloth or rubber cloth which has a compression layer made of functional polymer or is arranged on a base which has the compression layer made of functional polymer.
  • the blanket In the first transfer nip, the blanket must be highly compressible in order to compensate for tolerances and to minimize the surface pressure.
  • the compressibility of the compression layer at the two transfer gaps can be set independently of one another.
  • a design of the functional polymer as MAP has the advantage that the magnetic field used to control the MAP in the second transfer nip does not impair the electrical field that supports the transfer of the print image to the transfer cylinder in the first transfer nip.
  • the functional polymer can also be designed as an EAP.
  • Certain measures can be used to ensure that the electrical field required in the first transfer nip for transferring the print image is not weakened by the electrical field required in the second transfer nip to activate the EAP of the compression layer.
  • the measures can include structured, integrated surface electrodes above and / or below the compression layer.
  • Another measure in which integrated electrodes are not required consists in an orientation of the electric field in the second transfer gap parallel to the electric field in the first transfer gap.
  • the variation can relate to a variation in the resilience of the rubber blanket or transfer blanket serving as a cylinder cover or roller cover.
  • Resilience is a measure of how quickly the material of the component - in this case the rubber blanket - springs back again after it has been pressed in or flattened in the cylinder or roller gap, e.g. in the pressure gap, when it runs out of the gap.
  • MAP is particularly suitable as a functional polymer for varying resilience.
  • the loss modulus of the MAP can be varied by varying the strength of the magnetic field applied to the MAP. The change in the loss modulus changes the time which the MAP or the rubber blanket equipped with it needs to return to its original shape after the MAP has been pressed into the cylinder or roller nip. This varies the profile of the surface pressure in the outlet area of the cylinder or roller gap.
  • the thickness of the component is the property that can be varied by means of the functional polymer.
  • an electrically active polymer (EAP) and / or a magnetically active polymer (MAP) the thickness of a layer can be adjusted by applying an electric and / or magnetic field at the location desired change in properties can be varied.
  • EAP electrically active polymer
  • MAP magnetically active polymer
  • an elastic and / or compressible layer of a transfer cloth can be changed in its thickness by using the EAP and / or MAP material and thus the contact strip width and surface pressure of the transfer cloth with another body, e.g. the printing material or a cleaning roller, with a given contact pressure can be changed or the surface pressure can be changed for a given theoretical body penetration (infeed, indentation depth).
  • the functional polymer can, however, not only be used as an adjusting device for continuously adjusting the thickness, but also as a switching device for switching the component into two switching states.
  • the two switching states can be the printing operation and the printing deactivation when the transfer blanket is on a cylinder that forms the printing gap, for example the rubber blanket cylinder.
  • the print start and the print stop can be switched via the variable thickness of the transfer cloth or a pad arranged underneath.
  • An example of the use of the functional polymer of the transfer cloth or the functional polymer of the base for a stepless adjustment is the adjustment of the pressure setting.
  • a distance between the transfer cylinder and a cooperating impression cylinder is set as a function of the thickness of the printing material, for example the thickness of the paper sheet.
  • the change in thickness of the transfer cloth or the base can either only take place locally, for example in the transfer gap or printing gap, or simultaneously over the entire circumference of the transfer cylinder.
  • Another application of the change in thickness brought about by means of the functional polymer is the generation of changeable local electrical fields, for example by an array of electrodes, or local magnetic fields, for example by an array of coils, in a gap which extends longitudinally transversely to the printing direction.
  • Individual small areas of the transfer cloth can be brought into contact with a counterpart, for example an inking roller or the printing material, in order in this way to generate individual print points or a print image from a homogeneous ink layer.
  • Another application is to level out unevenness in the counterpart or the transfer cloth across the printing direction.
  • runout errors or other unevenness in the printing direction can also be compensated for, for example in order to keep the distance between a surface and a non-touching write head, for example an inkjet array or an LED array, constant by means of a control.
  • a non-touching write head for example an inkjet array or an LED array
  • runout errors or other unevenness in the printing direction can also be compensated for, for example in order to keep the distance between a surface and a non-touching write head, for example an inkjet array or an LED array, constant by means of a control.
  • the variation can relate to a variation in the coefficient of friction of a surface of the component by means of the functional polymer.
  • the application of electric and / or magnetic fields to layers made of the EAP and / or MAP material can be used to vary the coefficient of friction of the layer surface.
  • This variation can take place, depending on the material of the layer surface, by changing the elastic hardness and / or the surface roughness.
  • the uppermost layer of a transfer cloth can be varied in its coefficient of friction by using the EAP and / or MAP material and by applying an electric and / or magnetic field to the material.
  • the surface of a transfer cloth should have the highest possible coefficient of friction for the friction drive of rollers positioned on the transfer cloth, but the lowest possible coefficient of friction for interaction with a cleaning element.
  • the functional polymer of the transfer cloth its surface can be switched with regard to its coefficient of friction, optionally to a high coefficient of friction for the rollers and a low coefficient of friction for the cleaning element.
  • the component can not only be the transfer blanket or rubber blanket, but instead can also be a printing forme or printing plate and can also be a base arranged under such a printing forme. It is also possible that the component is an underlay under the printing material, e.g. an impression cylinder cylinder elevator.
  • Figure 1 shows a transfer cylinder 1 of a printing machine for offset printing.
  • the transfer cylinder 1 has a transfer cloth 2 on the circumference.
  • the printing machine can also be referred to as a printing material processing machine and the transfer cylinder 1 forms an assembly of this printing material processing machine.
  • the transfer cloth 2 forms a component of the assembly.
  • the transfer cloth 2 comprises a carrier layer 4, e.g. B. made of cotton fabric, a first electrode 5, a functional polymer 6 and a second electrode 7.
  • the functional polymer 6 is an electroactive polymer (EAP) and is arranged between the first electrode 5 and the second electrode 7.
  • the first electrode 5, the second electrode 7 and the functional polymer 6 each form a layer.
  • the transfer cloth 2 is designed as a composite material or laminate.
  • a counterpart 3 is in contact with the first electrode 5.
  • the counterpart 3 is a cylinder or a roller that rolls on the transfer cloth 2.
  • an electrical voltage is applied between the electrodes 5, 7.
  • a clamping device of the transfer cylinder 1 can be used, with which the transfer cloth 2 is held and tensioned at its front edge or rear edge.
  • the carrier layer 4 it is possible for the carrier layer 4 to be designed to be electrically conductive and for the transfer cylinder 1 to be grounded or to have a defined potential. In this case, the functional polymer 6 does not necessarily have to form the top layer of the transfer cloth 2.
  • the first electrode 5 is omitted and the surface of the counterpart 3 is designed to be electrically conductive.
  • the electrical voltage can be applied between the counterpart 3 and the second electrode 7.
  • the carrier layer 4 can be electrically conductive and the transfer cylinder 1 can be grounded or have a defined potential.
  • Figure 2 shows an embodiment which differs from that in Figure 1 only differs in that the first electrode 5 and the second electrode 7 are omitted.
  • the electrodes can be omitted because in the embodiment according to FIG Figure 2 the presence of an electric field is sufficient to activate the functional polymer 6, and not, as in the exemplary embodiment according to FIG Figure 1 , an electrical voltage needs to be applied to the functional polymer 6.
  • the electric field is generated by applying an electric voltage between the transfer cylinder 1 or the carrier layer 4 on the one hand and the counterpart 3 on the other hand.
  • the surface of the counterpart 3 does not necessarily have to be electrically conductive.
  • the second electrode 7 is present.
  • the surface of the counterpart 3 is electrically conductive and an electrical voltage is generated between the counterpart 3 and the second electrode 7 (cf. Figure 1 ) created. This creates the electric field by which the functional polymer 6 is activated.
  • the carrier layer 4 can be conductive be formed and the transfer cylinder 1 be grounded or have a defined potential.
  • Figure 3 shows an embodiment in which the functional polymer 6 is a magnetically active polymer (MAP) which is activated by a magnetic field.
  • the transfer cloth 2 has a first layer 8 and a second layer 9, between which the layer forming the functional polymer 6 is arranged.
  • the first layer 8 is a soft magnetic layer and the second layer 9 is a soft magnetic or permanent magnetic layer.
  • the layers 8, 9 are not absolutely necessary, but are advantageous for strengthening the magnetic field.
  • the magnetic field activating the functional polymer 6 can be generated by one or more current-carrying coils 11, 12, 13. Positions for these coils 11, 12, 13 are shown in the drawing by way of example.
  • the first coil 11 and the second coil 12 can be located inside or outside the counterpart 3.
  • the third coil 13 is located inside the transfer cylinder 1. If the assembly is not the transfer cylinder 1 but a pressure roller, the third coil 13 can also be arranged outside the assembly.
  • a permanent magnet 10 in combination with one or more current-carrying coils to generate the magnetic field that activates the functional polymer 6.
  • the permanent magnet can be formed by a permanent magnetic layer.
  • Figure 4 shows an embodiment which differs from that in Figure 3 differs shown by the presence of a base 14 between the transfer cylinder 1 and the transfer cloth 2.
  • the base 14 forms a functional polymer layer, here a MAP layer, which is present as an alternative or in addition to the functional polymer 6.
  • the base 14 is also present as an alternative or in addition to the functional polymer 6, the functional polymer of the base 14 being a EAP layer forms. Is the base 14 in the modification of the embodiment in Figure 1 In addition to the functional polymer 6, the base 14 can be subjected to the same voltage as the functional polymer 6 or a different voltage than the functional polymer 6.
  • Figure 5 shows an embodiment in which the functional polymer 6 is a foamed EAP layer.
  • the transfer cloth 2 comprises a cover layer 15, which is contacted by the counterpart 3 and is arranged on the first electrode 5.
  • the functional polymer 6 is activated and, since the latter is a foamed EAP layer, the compressibility of the transfer cloth 2 varies.
  • the clamping device for holding the transfer cloth 2 in place can be provided with an electrical contact via which the electrical voltage is transmitted to the transfer cloth 2.
  • Figure 7 shows an embodiment which differs from that in Figure 3 differs only in two points, namely by the presence of the cover layer 15 and by the expression of the functional polymer 6 as a foamed MAP layer.
  • the rubber-elastic cover layer 15 corresponds to the cover layer 15 of the exemplary embodiment Figure 5 and is arranged on the soft magnetic, first layer 8.
  • the counterpart 3 rolls on the cover layer 15.
  • Figure 11 shows an example in which the thickness of the transfer cloth 2 is varied with an array of microelectrodes or of microcoils.
  • the array extends over its length parallel to the axis of rotation of the transfer cylinder 1.
  • the array 17 is a coil array
  • the functional polymer 6 is a MAP layer and the first layer 8 arranged on the top of the functional polymer 6 is a soft magnetic layer and the second layer 9 arranged between the carrier layer 4 and the functional polymer 6 is a soft magnetic layer or a permanent magnetic layer.
  • Figure 12a shows a transfer cylinder 1, the axis of rotation of which is in the plane of the drawing Figure 12a is, in contrast to the axis of rotation of the transfer cylinder 1 in Figure 1 , which is perpendicular to the plane of the drawing Figure 1 is oriented.
  • a base 14 On the On the circumferential surface of the transfer cylinder 1 there is a base 14 which carries the transfer cloth 2.
  • the base 14 comprises a carrier layer 4 and a layer of functional polymer 6 thereon.
  • the layer of functional polymer 6 is subdivided into zones 18, each of which forms a functional polymer actuator.
  • the functional polymer 6 is an electroactive polymer (EAP), especially a dielectric elastomer.
  • EAP electroactive polymer
  • Each zone 18 is assigned its own electrode 7, the electrodes 7 being embedded in the carrier layer 4 in a matrix arrangement. Some of the zones 18 are activated by an electrical voltage on their electrodes 7 and form active zones 19 during printing.
  • the active zones 19 are expanded in the radial direction with respect to the transfer cylinder 1 and slightly lift the transfer cloth 2 in their area so that it is within this area comes into contact with the printing material 20. Outside the area of the active zone 19, the transfer cloth 2 is not in contact with the printing material 20.
  • Figure 12b shows the base 14 in plan view, the transfer cloth 2 and the printing material 20 not also being shown for better visibility. It can be seen that the zones 18 are honeycomb and together form a mosaic pattern 21.
  • the base 14 is used together with the transfer cloth 2 lying thereon in order to print a print image 22 on the printing material 20, e.g. B. a spot coating.
  • the print image 22 is in Figure 12b shown as an imaginary print image 22. Those zones 18 which lie in the area of the print image 22 or which overlap with it form the active zones 19. As a result, the mosaic pattern 21 is switched or activated in a state in which it corresponds to the print image 22 to be printed.
  • the zones 19.1 lying between the zones 19.2 and the central zones 18 are less contracted than the zones 19.2.
  • the effective diameter of the transfer cylinder 1 increases from both ends thereof toward the center, and the transfer cylinder 1 has a spherical or barrel shape.
  • the zonal control of the base 14 enables the transfer cloth 2 to be zoned to the format width of the printing material 20.
  • the radial adjustment of the base 14 in zones and with it the transfer cloth 2 allows the latter to be adapted to different print formats. This is advantageous as a countermeasure against so-called color build-up and against framing.
  • the first electrode 5 consists of a flexible material, for example an electrically conductive film, and can follow the contraction of the functional polymer 6 in order to achieve the desired change in diameter of the actuator 30.
  • the second electrode 7 can consist of thin sheet metal.
  • an annular disk is arranged which is electrically insulating in order to avoid an undesired voltage transfer from the actuator 30 to an adjacent actuator.
  • the annular disk consists of a rubber-elastic material and forms the insulation 28.
  • the functional polymer 6 does not fill the entire annular gap which is enclosed by the two electrodes 5, 7 and the two insulations 28.
  • the roller 25, which in the Figures 16a to 16c is shown without activated actuators 30 is in the Figures 17a to 17c shown with activated actuators.
  • Figure 17a corresponds with Figure 16a
  • Figure 17b corresponds with Figure 16b .
  • Figure 17c shows the detail F.
  • Figure 17a in an enlarged view.
  • the actuator located axially on the outside and the central actuator are subjected to electrical voltage and are thus contracted.
  • the two axially inner actuators are not subjected to electrical voltage and are therefore passive.
  • Figure 17c shows that the roller cover 26 clings to the actuators 30. Since an activated actuator in an active zone 19, which is located next to a passive actuator in a non-activated zone 18, cannot completely contract, a practically stepless transition is achieved.
  • FIGS 19a to 19c show an actuator 30 for adjusting the diameter of a roller.
  • Figure 19a a representation according to the section II in Figure 19b and is Figure 19c an enlarged view of the detail K.
  • Figure 19a In contrast to the actuator 30 of the Figures 15a to 15c , in which the electrodes are arranged on the outer and inner circumference of the functional polymer, here the electrodes 5, 7 are arranged on the lateral flat surfaces of the ring-shaped functional polymer 6.
  • the electrodes 5, 7 are inserted into annular grooves which are introduced into the side surfaces of the functional polymer 6, and are designed as annular disks.
  • the side walls of the respective annular groove are formed by projections made from the functional polymer 6.
  • the functional polymer 6 is a dielectric elastomer. When a voltage is applied to the two electrodes 5, 7, they attract each other due to the electrostatic pressure and they move towards one another. The functional polymer 6 is thereby displaced from the space between the electrodes and gives way to it in the radial direction. As a result, the outer diameter of the actuator 30 changes, it increases.
  • the actuators sit precisely on the roller base body 27, the volume of the functional polymer displaced by the axial movement of the electrodes can only move radially outward. As a result, the outside diameter of the activated actuators becomes larger and they also force the roller cover 26 radially outwards.
  • the outer diameter of the roller 25 thus increases in the area of the activated actuators, which is the roller end area here.
  • the roller bulges caused by the activated actuators at the two roller ends can be used to influence the dampening solution flow across the width of the contact strip.
  • the roll bead does not go over abruptly, but gradually into the area of the rest of the roll cover, since in this example too the activated actuator, which is located next to a passive actuator, cannot fully contract.
  • Figure 24 shows that the guide roller from the Figures 22 and 23 is set conically.
  • the actuators 30 are activated accordingly.
  • the conical slope of the roller 25 can be varied from cylindrical to slightly conical or adjusted continuously. In this way, a non-parallelism of deflecting rollers can be compensated for.
  • the position of the material web of the coating film 35 can be monitored via sensors and the actuators 30 of the roller 25 can be controlled as a function of the signals from these sensors, so that a web edge control is implemented by changing the cone slope.
  • the material web of coating film 35 shown is preferably a cold foil web, by means of which sheet-shaped printing material is coated in an offset printing machine.
  • FIG. 25 the punching station 1002 of a flatbed punching and / or embossing machine is shown in more detail.
  • a sheet of paper 1006 is moved through the punching station 1002 in the sheet transport direction B between the upper crucible 1010, also referred to as the upper table, and the lower crucible 1009, also referred to as the lower table.
  • the sheet 1006 is at rest during the punching process.
  • the punching station 1002 has a punching tool 1020, which is formed from an upper tool with a polymer plate 1021 with dielectric elastomers with a wooden support plate 1022 attached to it, which receives the punching knives 1023.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Treatment Of Fiber Materials (AREA)

Claims (4)

  1. Sous-ensemble d'une machine de traitement d'un support d'impression en feuilles ou en bande comprenant un polymère fonctionnel (6) - un polymère dit intelligent - pour modifier une propriété d'un composant du sous-ensemble, pour lequel le composant présente plusieurs zones (18, 19) dans lesquelles se trouve le polymère fonctionnel (6), les zones (18, 19) peuvent être commandées individuellement et sont des segments annulaires alignés axialement, le polymère fonctionnel (6) étant un polymère magnétiquement actif, un polymère électriquement actif ou un élastomère diélectrique, ou pour lequel le sous-ensemble comprend un rouleau (25) ayant un noyau de rouleau (27), des actionneurs en forme d'anneau sur celui-ci - appelés actionneurs annulaires (30) - avec un revêtement en caoutchouc (26), et les actionneurs annulaires (30) comprennent chacun une électrode intérieure (7), une électrode extérieure (5) et un élastomère diélectrique (6) disposés radialement entre les deux électrodes (5, 7), ou les actionneurs annulaires (30) comprennent chacun deux électrodes extérieures (5, 7) et un élastomère diélectrique (6) disposé axialement entre les deux électrodes (5, 7).
  2. Sous-ensemble selon la revendication 1,
    pour lequel la caractéristique est l'épaisseur ou le diamètre du composant.
  3. Sous-ensemble selon la revendication 1 ou 2,
    pour lequel le composant est un cylindre de machine à imprimer (1), un rouleau de machine à imprimer (25), un habillage de cylindre de machine à imprimer (2), un revêtement de rouleau de machine à imprimer (26), un rouleau de guidage de film de revêtement.
  4. Sous-ensemble selon l'une des revendications 1 à 3,
    pour lequel les segments annulaires sont pilotés de façon à obtenir un bombement du rouleau ou du cylindre.
EP15151732.3A 2014-02-13 2015-01-20 Module d'une machine de traitement de matière d'impression en forme de bande ou feuilles Active EP2907662B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014001970.5A DE102014001970A1 (de) 2014-02-13 2014-02-13 Baugruppe einer bogen- oder bahnförmigen Bedruckstoff verarbeitenden Maschine

Publications (2)

Publication Number Publication Date
EP2907662A1 EP2907662A1 (fr) 2015-08-19
EP2907662B1 true EP2907662B1 (fr) 2021-04-07

Family

ID=52449945

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Application Number Title Priority Date Filing Date
EP15151732.3A Active EP2907662B1 (fr) 2014-02-13 2015-01-20 Module d'une machine de traitement de matière d'impression en forme de bande ou feuilles

Country Status (3)

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EP (1) EP2907662B1 (fr)
CN (1) CN104842632B (fr)
DE (1) DE102014001970A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105807500B (zh) * 2016-05-31 2019-03-12 京东方科技集团股份有限公司 转印装置和转印方法
EP3967494A1 (fr) * 2020-09-11 2022-03-16 Flooring Technologies Ltd. Dispositif de génération d'une impression sur un support d'impression et procédé de commande du volume de puisage sur une plaque d'impression
CN114347638B (zh) * 2021-12-31 2023-09-19 宜宾轩驰智能科技有限公司 一种曲面玻璃印刷机

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Publication number Priority date Publication date Assignee Title
JPS5680046A (en) * 1979-12-05 1981-07-01 Toray Ind Inc Lithographic plate requiring no dampening water and its manufacture
DE3044083C2 (de) 1980-11-24 1990-05-10 Bobst S.A., Lausanne Stanzeinrichtungen für Stanzautomaten zum Stanzen von Bögen aus Papier, Pappe u. dgl.
FI79746C (fi) * 1988-04-27 1990-02-12 Valmet Paper Machinery Inc Zonreglerad vals.
DE3938449A1 (de) * 1989-11-18 1991-05-23 Roland Man Druckmasch Druckwerk
US6092465A (en) * 1998-03-03 2000-07-25 United Container Machinery, Inc. Method and apparatus for providing erasable relief images
JP2000108477A (ja) * 1998-10-09 2000-04-18 Riso Kagaku Corp 孔版印刷方法、装置及び原版
US7073435B2 (en) * 2003-07-11 2006-07-11 Goss International Americas, Inc. Printing blanket with convex carrier layer
CN101045367A (zh) * 2006-03-28 2007-10-03 海德堡印刷机械股份公司 网纹辊印刷装置
DE102007031057A1 (de) * 2007-07-04 2009-01-08 Manroland Ag Elektrete und deren Einsatz in Druckmaschinen
DE102007062336A1 (de) * 2007-12-22 2009-06-25 Manroland Ag Rotationsdruckmaschine mit energieautarkem Aktorsystem
DE102008018590B4 (de) * 2008-04-07 2017-07-13 Sächsische Walzengravur GmbH Zylinder für eine lösbare Verbindung mit mindestens einem Arbeitsmittel
US8152290B2 (en) * 2008-11-26 2012-04-10 Xerox Corporation Customization of curable ink prints by molding
EP2239793A1 (fr) * 2009-04-11 2010-10-13 Bayer MaterialScience AG Montage de film polymère électrique commutable et son utilisation
EP2654196B1 (fr) * 2011-10-11 2017-06-14 Sumitomo Riko Company Limited Transducteur

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Also Published As

Publication number Publication date
CN104842632A (zh) 2015-08-19
EP2907662A1 (fr) 2015-08-19
CN104842632B (zh) 2019-10-01
DE102014001970A1 (de) 2015-08-13

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