EP1492674B1 - Procede de selection d'une couche sur un rouleau et unite d'impression - Google Patents

Procede de selection d'une couche sur un rouleau et unite d'impression Download PDF

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Publication number
EP1492674B1
EP1492674B1 EP02762256A EP02762256A EP1492674B1 EP 1492674 B1 EP1492674 B1 EP 1492674B1 EP 02762256 A EP02762256 A EP 02762256A EP 02762256 A EP02762256 A EP 02762256A EP 1492674 B1 EP1492674 B1 EP 1492674B1
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EP
European Patent Office
Prior art keywords
cylinder
layer
printing unit
roller
real
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EP02762256A
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German (de)
English (en)
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EP1492674A1 (fr
Inventor
Karl Erich Albert Schaschek
Ralf Christel
Oliver Frank Hahn
Bernd Kurt Masuch
Kurt Johannes Weschenfelder
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Koenig and Bauer AG
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Koenig and Bauer AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/193—Transfer cylinders; Offset cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F30/00—Devices for attaching coverings or make-ready devices; Guiding devices for coverings
    • B41F30/04—Devices for attaching coverings or make-ready devices; Guiding devices for coverings attaching to transfer cylinders
    • 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
    • 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
    • B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
    • B41N2210/02—Top layers

Definitions

  • the invention relates to a method for selecting a layer on a roller and a printing unit according to the preamble of claim 1 or 3.
  • ink between one or more rollers of an inking unit, between inking unit and printing cylinders, possibly between printing cylinders and from a printing cylinder against a counter-pressure cylinder (hereinafter referred to as rollers) to a web, z. B. paper web applied.
  • rollers a counter-pressure cylinder
  • the transfer of the color of two adjacent rollers, possibly acting together via the web, preferably takes place in each case between a roller with a "hard” and a roller with a "soft" surface.
  • a printing blanket which has an incompressible and a compressible elastomeric layer, the latter increasing the tolerances in the printing process.
  • the rotational angle difference can be determined on the basis of a laboratory model for different elevators and different provisions, wherein a driven first cylinder and a free-running, and the elevator having the second cylinder are set against each other.
  • a device for determining the rolling behavior has an externally driven and a friction-driven roller whose angular velocities can be measured by opto-electronic angle decoders.
  • the invention has for its object to provide a method for selecting a layer on a roller and a printing unit.
  • the advantages which can be achieved with the invention are, in particular, that a quantitative description of the elevators with respect to their conveying or rolling behavior is made possible, and that the marking thus produced is independent of a geometry of a measuring device and independent of a geometry of a printing unit.
  • the characteristic serving for characterizing the elevator code is adjusted to the specific geometries and alternately applicable to a measuring device or the printing unit. The description is no longer purely qualitative (eg positive, negative), but quantitatively usable.
  • An advantageous solution is thus to select a lift for a given pair of cylinders so that it stretches on depression due to its incompressible portion to the extent that the reduced distance to the pivot point is just compensated.
  • Such a requirement can be determined by means of the method and a corresponding elevator can be selected.
  • the measurements required to form the code are z. B. determined by means of a two-roller measuring device.
  • the measuring device has for detecting the distance or the change in distance (indentation) in an advantageous embodiment of the adjusting movement translating lever.
  • a higher ratio can still be achieved via a cylinder moving eccentric, wherein the lever is rigidly connected to the bearing ring to be pivoted.
  • the index obtained for an elevator is applicable to the most diverse printing unit configurations and independent of the geometry of the measuring device used. Only the algebraic rule between geometry and index must be defined and known.
  • Another advantage is the possibility to configure a print engine optimized for the roll-off behavior.
  • a single-circumference transfer cylinder having an elevator of an index ⁇ of 0.980 to 0.995 is formed when cooperating with a counter pressure cylinder of substantially the same circumference, respectively.
  • the indicated characteristic numbers ⁇ are to be maintained at least in a field relevant for practice for a relative indentation.
  • a work machine, z. B. a printing press has successive rolling rollers 01; 02, which form a nip 03 in the region of their touch.
  • rolls 01; 02 an inking unit, a coating unit, or cylinder 01; 02 be a printing unit.
  • the cylinder 01; 02 is a forme cylinder 01 having an effective diameter D wPZ and a transfer cylinder 02 of an offset printing unit.
  • One of the cylinders 01; 02, z. B. the transfer cylinder 02 has on the lateral surface of a largely incompressible, non-elastic core 04 with a Diameter D wGZK a soft, elastomeric layer 06 of a thickness t.
  • the effective diameter D wPZ is determined by the effective for rolling lateral surface of the forme cylinder 01 and optionally includes a force applied to the outer surface of a base body, not shown printing form.
  • the hard surface cylinder 01 can also be embodied as an impression cylinder 01 which cooperates with the transfer cylinder 02.
  • the present invention is now based on the approach to provide an independent of the specific applications or measuring devices for the rolling behavior of such a layer 06, on the basis of which a suitable layer selected 06, or a dimensioning of the rollers 01; 02 can be made.
  • a suitable layer selected 06 or a dimensioning of the rollers 01; 02 can be made.
  • an ideally compressible layer 06 eg cork or the like
  • an ideally incompressible layer 06 eg solid rubber
  • the real layer 06 as inhomogeneous material composite consisting of z. B. fabric, air cushion layer, adhesive and rubber top plate, so both compressible and incompressible components, is within the above-mentioned borderline cases.
  • the solution lies in determining or determining the relative position of the measured or desired behavior with respect to the two theoretically determinable exteme behavior-purely compressible, purely incompressible.
  • the indentation S of the layer 06 in the nip 03 causes a compression of the layer 06.
  • the velocity v 0 at the undisturbed surface of the layer 06 is reduced in the constriction zone to the velocity v 1 due to a reduced effective diameter D wGZ ( Fig. 1 ).
  • connection of the measuring points result in a good approximation straight lines, which all begin at the intersection of the border cases also registered.
  • the z. T. recognizable offset to the intersection is justified in the different strengths t of the blankets 06 used.
  • Fig. 4 shows the speed or gear ratios I in the ideal compressible, ideally incompressible and real case in a schematic representation.
  • z. B. a blanket 06 is now first a measurement to determine the real transmission ratio I real at a suitable measuring device (see below) for at least one measuring point (a depression S) performed.
  • the geometries of the measuring device are known, so that with knowledge of the strength t, the theoretical ratios I for the ideally compressible and the ideally incompressible case already exist or can be formed.
  • a code ⁇ is calculated on the basis of a ratio between the z. B. in the measurement with a corresponding measuring device actually occurring gear ratios I to the idealized borderline cases, each to the same indentation S formed. Due to the at least partially idealized and linearized relationships, the characteristic ⁇ defined in this way is a constant for all indentations S, or for at least the region under consideration, which is the rolling behavior (Stretching or compression) of the layer 06 objectively describes.
  • the code ⁇ can also be formed by a different kind of algebraic rule which describes the relative position of the measured real gear ratios I to the position of the extreme theoretically determinable gear ratios I.
  • another normalization for example by multipliers, a spread of the range of values or a shift by addition / subtraction, are selected.
  • the differences in the quotient can also be reversed, as well as the numerator and denominator reversed.
  • the conveying device eg based on the resulting gear ratio I real
  • the measured and theoretically determined gear ratios I real ; I comp ; I incomp this are at least partially set in relation to each other in relation, in particular to each other according to an algebraic rule [9] in proportion.
  • the characteristic ⁇ can be determined on the basis of a single measured value for a depression S.
  • the index ⁇ thus enables a quantification of the change in the effective diameter D wGZ of the transfer cylinder 02 at a certain indentation S and thus in the case of an angle-synchronous running of the cylinder 01; 02 also a calculation of the occurring slip.
  • a method for designing cylinders 01; 02 is, for example, in order to avoid slip or unnecessary forces in the drive, based on the known, at least in sections constant index ⁇ for the intended layer 06, a thickness t, and with the predetermined format (diameter D PSC; D wPZ) of the cylinder 01; 02 the diameter D wPZ ; D GZK of the other cylinder 02; 01erstofft. So can For example, for a blanket 06 with a known ratio ⁇ , a desired course (vertical height and slope in the diagram) in the relationship between gear ratio I and indentation S, as well as with known diameter D wPZ z. B. the forme cylinder 01, the required diameter D GZK of the core 03, or the total diameter D wGZK + 2 t of the transfer cylinder 02 are determined.
  • the development or deformation behavior (stretching or compression) of the layer 06 (blanket 06, sleeve, metal blanket, coating / elevator / jacket of an inking roller) described by the characteristic ⁇ can be used in the choice of the diameter D GZK ; D wGZ ; D WPZ for ideal handling.
  • the code ⁇ for a given blanket 06 diameter D GZK ; D wGZ ; D wPZ be designed so that optimal processing is achieved.
  • the diameters D GZK ; D wGZ ; D wPZ be optimized in such a way that the deviation from the optimal processing for a range of different blankets 06 is minimal.
  • the number or thickness of documents between outer surface and blanket 06 for adjusting the diameter D GZK already determined in the run-up to printing and taken into account during setup the number or thickness of documents between outer surface and blanket 06 for adjusting the diameter D GZK already determined in the run-up to printing and taken into account during setup ,
  • a suitable layer 06, z. B. a blanket 06 on the basis of predetermined printing unit geometries (diameter D GZK , D wPZ ) are selected by first algebraic extreme cases for the conveying behavior as a function of the indentation S are determined, then a desired course (slope, vertical height in the diagram) for the Conveying behavior of a real layer 06 is set at least in sections, and then adjusted by the specific geometry index ⁇ for the required layer 06, z. B. a blanket 06, is formed by a relative position of the desired course or a value to the algebraically determined gradients or values is determined at least for a value of the indentation S.
  • a rubber blanket 06 corresponding index ⁇ can now be selected if it was formed on the basis of the same algebraic rule for the description of the relative position. Were used for the measurement and determination of the index ⁇ on the blanket 06 and for determining the desired index ⁇ on the basis of the geometry of the cylinder 01; 02 different algebraic regulations used, these are in the knowledge of the regulations interconvertible.
  • An elevator 06 with a suitable index ⁇ for a particular printing unit geometry thus does not generally fit for a different geometry, in particular a different ratio of the diameter D GZK ; D wPZ .
  • Beigorithsunmultiplexer settlement elevator 06 and printing unit geometry are matched to one another such that at least in a relevant for practice area for the indentation S or a relative indentation S * the slope in Fig. 4 between gear ratio I real and indentation S is essentially zero, ie dI real / dS ⁇ 0.
  • the relative indentation S * is here defined by the ratio S / t, ie the indentation S with respect to the original, not depressed thickness t of the layer 06.
  • a corresponding range for the relative indentation S * can be seen in general consideration z. B. between 6% and 10%, but especially between 6.5% and 9%.
  • nip between a transfer cylinder 02; 11 and a forme cylinder 01; 12 is the relevant area for practice z. B. from 6% to 7%, while for the Nippstelle between a transfer cylinder 02; 11 and a satellite cylinder 16 of 9% to 10%.
  • the slope dl real / dS should be in terms of magnitude in these areas at least less than or equal to 0.01 1 / mm, in particular less than or equal to 0.005 1 / mm.
  • Considered strengths t are for a favorable type of elevators 06 at z. B. 1.6 to 2.5 mm, while for a second advantageous variety with a lower spring force or surface pressure and / or a lower slope of a spring characteristic (surface pressure / indentation) the strengths at z. B. 3.5 to 5 mm.
  • Fig. 5 to 8 illustrated printing units or printing units are all shown linearly for the sake of simplicity, ie the axes of rotation of the participating cylinders are all in one plane in the representations.
  • the cylinders of the printing units can also be arranged at an angle to each other, so that the following statements are equally applicable to linear and angular arrangements of the cylinder or cylinder groups.
  • Double printing 07 executed printing unit 07 is shown.
  • the forme cylinder 01 associated transfer cylinder 02 of a first cylinder pair 01; 02 acts on a substrate 08, z. B.
  • All four cylinders 01; 02; 11; 12 are mechanically driven independently of each other by means of various drive motors 13 ( Fig. 5 ).
  • forming and transfer cylinders 01; 02; 11; 12 coupled in pairs by a paired drive motor 13 (on the forme cylinder 01, 12, on the transfer cylinder 02, 11 or parallel) ( Fig. 6 ).
  • the form cylinder 01; 12 and the transfer cylinder 02; 11 are in a first embodiment as a cylinder 01; 02; 11; 12 double circumference, ie with a circumference of substantially two stationary printed pages, in particular of two newspaper pages executed. They are with effective diameters D wGZ ; D wPZ made between 260 to 400 mm, in particular 280 to 350 mm.
  • the transfer cylinder 02; 11 each at least one elevator 06 with a ratio ⁇ of 0.989 to 0.999, in particular from 0.993 to 0.997 on.
  • the speed ratio I real is preferably chosen such that, upon variation of the indentation S or the relative indentation S *, at least within the abovementioned ranges for the relative indentation S * of the corresponding cylinder pairing, by a maximum of 0.002, in particular 0.001, of 1.000 / n differs.
  • the forme cylinders 01; 12 and the transfer cylinder 02; 11 as a cylinder 01; 02; 11; 12 simple circumference, ie with a circumference of substantially a stationary pressure side, in particular from a newspaper page executed. They are with effective diameters D wGZ ; D wPZ running between 150 to 190 mm.
  • the transfer cylinder 02; 11 each have at least one elevator 06 with an index ⁇ of 0.980 to 0.995, in particular from 0.983 to 0.993.
  • the speed ratio I real is again preferably selected so that it varies in the indentation S or the relative indentation S *, at least within the above said range for the relative indentation S * of the corresponding cylinder pairing to a maximum of 0.002, in particular 0.001, of 1.000 / n, ie 0.002, in particular 0.001 deviates from 1.000.
  • the forme cylinder 01; 12 as a cylinder 01; 12 simple circumference with effective diameters D wPZ between 150 to 190 mm, and the transfer cylinder 02; 11 as a cylinder 02; 11 double circumference with effective diameters D wGZ made between 260 to 400 mm, in particular 280 to 350 mm.
  • the transfer cylinder 02; 11 each have at least one elevator 06 with a ratio ⁇ of 0.987 to 1.000, in particular from 0.997 to 1.000.
  • a printing unit 14 is shown, which is either part of a larger printing unit, such.
  • B. a five-cylinder, nine-cylinder or ten-cylinder printing unit is, or is operable as a three-cylinder printing unit 14.
  • the transfer cylinder 02 acts here with a cylinder leading no ink 16, z.
  • B. a counter-pressure cylinder 16, in particular a satellite cylinder 16, together.
  • the "which" lateral surface of the transfer cylinder 02 now interacts with the "hard” lateral surface of the forme cylinder 01 on one side, and with the "hard” lateral surface of the satellite cylinder 16 on the other side.
  • the effective diameter D wPZ used in the above considerations for the forme cylinder 01 is to be replaced accordingly in the equations for the interaction between transmission and satellite cylinder 16 as the diameter D wSZ of the satellite cylinder 16.
  • the or more satellite cylinder 16 has its own drive motor 13, while the pair of molding and Transfer cylinder 01; 02 mechanically coupled by a common drive motor 13 (FIG. Fig. 7 ), or are mechanically driven independently of each other by a separate drive motor 13 ( Fig. 8 ).
  • Form cylinder 01, transfer cylinder 02 and satellite cylinder 16 are in a first embodiment of Fig. 6 as a cylinder 01; 02; 16 double circumference with effective diameters D wGZ ; D wPZ ; D wSZ made between 260 to 400 mm, especially 280 to 350 mm.
  • the transfer cylinder 02; 11 at least one elevator 06 with a ratio ⁇ of 0.990 to 0.999, in particular from 0.993 to 0.997 on.
  • cylinder 01, transfer cylinder 02 and satellite cylinder 16 as a cylinder 01; 02; 16 simple circumference, ie with a circumference of substantially a standing pressure side, especially from a newspaper page executed. They are with effective diameters D wGZ ; D wPZ ; D wSZ performed between 120 to 180 mm, in particular 130 to 170 mm.
  • the transfer cylinder 02 On the lateral surface of the core 04, the transfer cylinder 02 has at least one elevator 06 with a characteristic ⁇ of 0.980 to 0.995, in particular 0.983 to 0.993.
  • a third embodiment not shown for Fig. 7 or 8 is the forme cylinder 01 as a cylinder 01 single circumference with effective diameters D wPZ between 120 to 180 mm, in particular 130 to 170 mm, and transfer cylinder 02 and satellite cylinder 16 as a cylinder 02; 16 double circumference with effective diameters D wGZ ; D wSZ made between 260 to 350 mm, in particular 280 to 320 mm.
  • the transfer cylinder 02; 11 each have at least one elevator 06 with an index ⁇ of 0.985 to 0.995, in particular from 0.990 to 0.995.
  • cylinder 01 and transfer cylinder 02 as a cylinder 01; 02 simple circumference with effective diameters D wPz ; D wGZ between 120 to 180 mm, in particular 130 to 170 mm, and the satellite cylinder 16 as a cylinder 02; 16 double circumference with effective diameters D wSZ made between 260 to 350 mm, in particular 280 to 320 mm.
  • the transfer cylinder 02; 11 each have at least one elevator 06 with an index ⁇ of 0.985 to 0.995, in particular from 0.990 to 0.995.
  • the code ⁇ of a lift 06 is determined by measuring the elevator 06 on a suitable device and subsequent processing using an algorithm.
  • Fig. 9 is an embodiment of a measuring device in plan view and in Fig. 10 shown in a larger side view, as it is particularly suitable for determining the index ⁇ .
  • the measuring device has at least two cylinders 17; 18 or rollers 17; 18, which are rotatably mounted in a frame 19, in particular on both sides. At least one of the two cylinders 17; 18, here the cylinder 17, has a largely incompressible and non-elastic, hard lateral surface. At least one of the two cylinders 17; 18 is mounted such that an axial distance a between the axes of rotation of the two cylinders 17; 18 is changeable.
  • the "hard" lateral surface is executed, the forming or satellite cylinder 01; 12; 16 corresponding, cylinder 17 each mounted on the front side with a pin in an eccentric bushing 21 in the frame 19.
  • the other cylinder 18 is mounted in the example in a conventional manner fixed in the frame 19.
  • the storage of the cylinder 17; 18 is stiff and free of play.
  • the bearings are designed accordingly massive.
  • the backlash is given either by a tapered seat of the camp or by thermal shrinking. It can but also the soft cylinder 18 movable and the hard cylinder 17 fixed, or both cylinders 17; 18 be movably mounted.
  • the mobility can u. U. also by pivoting a mounted in levers or in a linear guide cylinder 17; 18 be realized.
  • the eccentric bushing 21 has an eccentricity e of twice or four times the thickness t of the device usually to be measured with the layer 06 on an advantageous embodiment (n 2 * t to 4 * t) and is z. B. between 3 and 8 mm, in particular between 4 and 6 mm, a variety of layers 06, and between 8 to 16 mm, in particular between 10 and 14 mm for a stronger variety.
  • the position of the eccentricity e closes with a plane E in a basic position an angle ⁇ of 75 to 120 °, in particular 85 to 110 ° form.
  • a basic position here is that position of the cylinder 17; 18 viewed to each other, in which just a line contact of the two lateral surfaces, takes place substantially without indentation S.
  • a rotation of the eccentric bushing 21 takes place in an advantageous embodiment in each case via a rigidly connected to the eccentric bushing 21 lever 22, which is pivotable about the pivot axis of the eccentric bushing 21 by means of an actuator 23.
  • the actuator 23 can basically different, z. B. as a motor-driven threaded spindle, be executed.
  • the actuator 23 is designed as a pressurizable cylinder 23 which is articulated on the frame 19 and whose piston rod 24 is pivotally connected to the lever 22 (or vice versa).
  • the actuator 23 pivots the lever 22 against a pivotal movement of the eccentric bush 21 to smaller center distances a of the cylinder 17; 18 towards limiting stop 26.
  • This stop 26 is designed to be adjustable in the direction of its travel limit for the lever 22, but fixed in the desired position relative to the frame 19.
  • This stop 26 has a rotatable in a frame-fixed thread threaded bolt 27, z. As a threaded spindle or a screw with fine thread, on its front side the stop 26. By turning the threaded bolt 27, manually or motor, the stop 26 can be further in the direction of lever 22 or move away from it.
  • the movement or the position of the eccentric bush 21 or of the lever 22 is determined in an advantageous embodiment by means of a displacement measurement 28.
  • this measurement is carried out by means of a frame-mounted dial indicator 28, whose free, and movable plunger with the lever 22 cooperates.
  • a dial gauge 28 wherein one revolution of the pointer corresponds to a linear movement of the plunger of less than 0.05 mm, in particular less than or equal to 0.02 mm.
  • the distance measurement 28 may, however, instead of a mechanical design in other ways, for. B. be carried out electrically and / or magnetically. The measured value can then be converted, either from a mechanical into an electrical signal or as a directly obtained electrical signal, to a data processing, not shown.
  • an arrangement is advantageous, according to which a tapped off at the lever 22 distance b between the pivot axis A and measuring point of the distance measurement is large compared to the eccentricity e.
  • the ratio of distance b to eccentricity e is in an advantageous embodiment greater than or equal to 20, in particular greater than or equal to 50. From the eccentricity e, the distance b, the resolution of the displacement measurement and the known line for the pivoting of the axis of rotation is the movement of the cylinder 17th defined on its lateral surface.
  • the measurement accuracy of a measuring device designed in this way has a reproducibility in the indentation S of less than or equal to 0.005 mm.
  • the stop is designed to be movable by motor, wherein the position of the stop 26 is present or predetermined as an electrical signal.
  • the measured value of the distance measurement 28 is in the form of an electronic signal.
  • the adjustment of the stop 26 and the distance measurement 28 by only one means, such as. B. by a driven by a angle adjustable electric motor threaded spindle with fine thread. About the angular position receives a data processing information about the position or vice versa.
  • the measuring device z. B one or more light sources, not shown, on one side of the gap between the cylinders 17; 18 on.
  • the light can be detected in manual operation on the other side of the gap by the human eye or in automatic operation, for example by one or more detectors.
  • the signal is forwarded to the data processing, not shown.
  • the electric motor is exchangeable with the hard or the soft cylinder 18; 17 connectable.
  • the negative influence on the rolling behavior by the drive of a cylinder 17; 18 over friction is reduced by the use of bearings of extremely low friction.
  • a maximum deviation in the measured transmission ratio I to the "true" transmission ratio I of a maximum of 0.01% is achievable.
  • the angular velocity or the respective angular position of the two cylinders 17; 18 is by means of each cylinder 17; 18 and a respective pin arranged rotary encoder 31; 32, z.
  • the hard cylinder 17 in an advantageous manner in the rolling with the soft cylinder 18 area a continuous, uninterrupted lateral surface.
  • this can also be achieved by possibly arranging "replacement printing plates" located on the lateral surface in the circumferential direction (eg 180 °), or, if the hard cylinder 17 has only a finite replacement printing form, the resulting impact or impact Channel is flush with the lateral surface by a cover 33 is closed (see, for example Fig. 9 ).
  • equations [5], [8], and [9] determine the index ⁇ as described above.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Printing Methods (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Dot-Matrix Printers And Others (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Adjustment And Processing Of Grains (AREA)

Claims (17)

  1. Procédé de sélection d'une couche (06) sur un rouleau (01 ; 02 ; 11 ; 12 ; 16), où :
    - d'abord, à partir de la géométrie prédéterminée des groupes d'impression, on détermine, au moins par tronçons, en fonction d'un enfoncement (S), les valeurs extrêmes, résultant théoriquement pour le cas purement compressible et le cas purement incompressible, du rapport des vitesses de rotation (Ikomp ; Iinkomp),
    - on fixe, au moins par tronçons, une position relative souhaitée pour le rapport des vitesses de rotation (Ireal) d'une couche (06) réelle, par rapport aux valeurs extrêmes pour le rapport des vitesses de rotation (Ikomp ; Iinkomp),
    - à l'aide d'un placement en référence, au moins par tronçons, de l'allure souhaitée, par rapport aux allures, déterminées théoriquement, pour les valeurs extrêmes (Ikomp ; Iinkomp), à l'aide d'une expression algébrique on forme un indice (α), débarrassé de la géométrie spécifique, pour la couche (6) souhaitée, l'expression algébrique exprimant la position relative du rapport entre les vitesses de rotation (Ireal) mesuré par rapport aux deux valeurs extrêmes du rapport des vitesses de rotation (Ikomp ; Iinkomp) pour l'enfoncement (S) concerné ;
    - et la couche (6) souhaitée étant sélectionnée de manière qu'elle présente un indice (α) dans la fourchette de 0,980 à 0,999, lorsque l'indice (α) est formé par l'expression algébrique : α = I real - I inkomp I komp - I inkomp
    Figure imgb0015
    où Ikomp ; Iinkomp constitue un rapport de vitesses de rotation pour les cas extrêmes d'une couche (06) purement compressible et le cas purement incompressible, et Ireal un rapport de vitesses de rotation souhaité.
  2. Procédé selon la revendication 1, caractérisé en ce que l'indice (α) caractérisant de la couche (6) est formé, d'abord par mesure sur un dispositif de mesure et apurement subséquent de la géométrie du dispositif de mesure, par la même expression algébrique.
  3. Unité d'impression comprenant au moins deux rouleaux (01 ; 02 ; 11 ; 12 ; 16) coopérant, au moins l'un des rouleaux (02 ; 11) présentant, sur sa surface d'enveloppe, une couche (06) élastique et l'autre rouleau (01 ; 12 ; 16) présentant une surface d'enveloppe notablement indéformable, caractérisée en ce que la couche (06) élastique présente, au moins pour une zone d'un enfoncement (S*) relatif, un indice (α) décrivant ses propriétés élastiques, dans la fourchette de 0,980 à 0,999, l'indice (α) étant formé par l'expression algébrique : α = I real - I inkomp I komp - I inkomp
    Figure imgb0016
     où Ikomp ; Iinkomp constitue un rapport de vitesses de rotation pour les cas extrêmes d'une couche (06) purement compressible et le cas purement incompressible, et Ireal un rapport de vitesses de rotation souhaité.
  4. Unité d'impression selon la revendication 3, caractérisée en ce que, en cas de variation, au moins dans une zone, d'un enfoncement (S*) relatif de la couche (06), le rapport de vitesses de rotation Ireal s'écarte de 1.000/n, d'une valeur maximale de 0,002, en particulier de 0,001, n étant le rapport entre le nombre de pages d'impression en direction périphérique sur le rouleau (02 ; 11) et le nombre de pages d'impression sur l'autre rouleau (01 ; 12 ; 16).
  5. Unité d'impression selon la revendication 3, caractérisée en ce que, au moins pour la zone d'un enfoncement (S*) relatif, le quotient différentiel (dIreal/dS), entre le rapport de vitesses de rotation (Ireal) et l'enfoncement (S) s'écarte de zéro d'une valeur maximale de 0,01 1/mm.
  6. Unité d'impression selon la revendication 5, caractérisée en ce que le quotient différentiel (dIreal/dS) est sensiblement de valeur zéro.
  7. Unité d'impression selon l'une ou plusieurs des revendications 3 à 6, caractérisée en ce que la zone de l'enfoncement (S*) relatif pour le point d'emprise entre un rouleau (01 ; 02 ; 11 ; 12) réalisé sous forme de cylindre de transfert (02 ; 11) et un autre réalisé sous forme de cylindre de forme (01 ; 12) est dans la fourchette de 6 % à 7 %.
  8. Unité d'impression selon l'une ou plusieurs des revendications 3 à 6, caractérisée en ce que la zone de l'enfoncement (S*) relatif pour le point d'emprise entre un rouleau (02 ; 11) réalisé sous forme de cylindre de transfert (02 ; 11) et un autre réalisé sous forme de cylindre satellite (16) est dans la fourchette de 9 % à 10 %.
  9. Unité d'impression selon la revendication 3, caractérisée en ce que les deux rouleaux (01 ; 02 ; 11 ; 12 ; 16) présentent chacun un diamètre efficace (DwGZi ; DwPZ) de 260 à 350 mm, et la couche (06) présente un indice (α) dans la fourchette de 0,989 à 0,999.
  10. Unité d'impression selon la revendication 3, caractérisée en ce que les deux rouleaux (01 ; 02 ; 11 ; 12 ; 16) présentent chacun un diamètre efficace (DwGZi ; DwPZ) de 120 à 180 mm, et la couche (06) présente un indice (α) dans la fourchette de 0,989 à 0,999.
  11. Unité d'impression selon la revendication 3, caractérisée en ce que le rouleau (02 ; 11) présentant la couche (06) élastique est réalisé sous forme de cylindre de transfert (02 ; 11) et le rouleau (01 ; 12) présentant la surface d'enveloppe notablement indéformable est réalisé sous la forme de cylindre de forme (01 ; 12).
  12. Unité d'impression selon la revendication 3, caractérisée en ce que le rouleau (02 ; 11) présentant la couche (06) élastique est réalisé sous forme de cylindre de transfert (02 ; 11) et le rouleau (16) présentant la surface d'enveloppe notablement indéformable est réalisé sous la forme de cylindre satellite (16).
  13. Unité d'impression selon la revendication 3, caractérisée en ce que les deux rouleaux (01 ; 02 ; 11 ; 12 ; 16) sont réalisés sous forme de rouleaux (01 ; 02 ; 11 ; 12 ; 16) coopérant d'un groupe d'encrage.
  14. Unité d'impression selon la revendication 13, caractérisée en ce que l'un des rouleaux (01 ; 02 ; 11 ; 12 ; 16) est entraîné par moteur et l'autre des rouleaux (01 ; 02 ; 11 ; 12 ; 16) est entraîné par friction.
  15. Unité d'impression selon la revendication 11, caractérisée en ce que le cylindre de transfert (02 ; 11) coopère avec un troisième rouleau (16), réalisé sous forme de rouleau satellite (16), entraîné par un moteur d'entraînement (13), de manière mécaniquement indépendante des deux premiers rouleaux (01 ; 02 ; 11 ; 12).
  16. Unité d'impression selon la revendication 3, 11, 12 ou 13, caractérisée en ce que les deux rouleaux (01 ; 02 ; 11 ; 12 ; 16) sont entraînés par paires, par un moteur d'entraînement (13) commun.
  17. Unité d'impression selon la revendication 3, 11, 12 ou 13, caractérisée en ce que les deux rouleaux (01 ; 02 ; 11 ; 12 ; 13) sont entraînés mécaniquement indépendamment l'un de l'autre au moyen de deux moteurs d'entraînement (13).
EP02762256A 2002-04-11 2002-08-28 Procede de selection d'une couche sur un rouleau et unite d'impression Expired - Lifetime EP1492674B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US37141102P 2002-04-11 2002-04-11
US371411P 2002-04-11
PCT/DE2002/003142 WO2003086760A1 (fr) 2002-04-11 2002-08-28 Caracterisation, determination d'un indice et selection de garnitures appropriees sur les cylindres d'une machine d'impression

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EP1492674A1 EP1492674A1 (fr) 2005-01-05
EP1492674B1 true EP1492674B1 (fr) 2010-05-05

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JP (1) JP2005519794A (fr)
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AT (1) ATE466729T1 (fr)
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DE (3) DE10296772D2 (fr)
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Publication number Priority date Publication date Assignee Title
DE10327490B4 (de) * 2003-06-17 2006-09-21 Koenig & Bauer Ag Druckeinheit einer Rotationsdruckmaschine
DE102006011477B4 (de) * 2006-03-13 2007-12-27 Koenig & Bauer Aktiengesellschaft Druckwerk mit einem geteilten Formzylinder
BRPI1012171B1 (pt) 2009-05-14 2019-09-03 Burcon Nutrascience Mb Corp produção de produto de proteína de canola sem tratamento térmico ("c200cac")
DE102012012020A1 (de) 2012-06-16 2012-11-08 Heidelberger Druckmaschinen Ag Verfahren zum Zuführen eines Bogens zu einer Maschine
JP7083811B2 (ja) * 2017-03-24 2022-06-13 住友重機械工業株式会社 制御装置

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Publication number Priority date Publication date Assignee Title
FR2659903B1 (fr) * 1990-03-23 1994-11-04 Rollin Sa Element elastique et compressible d'impression formant blanchet.
DE4315456A1 (de) 1993-05-10 1993-11-18 Ritz Karl Friedrich Axel Prof Farbübertragungselement für den Offset- und Flexodruck sowie für Lackierwerke im Druck

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DE20213169U1 (de) 2002-11-14
RU2004106149A (ru) 2005-07-10
CN1575234A (zh) 2005-02-02
EP1492674A1 (fr) 2005-01-05
ATE466729T1 (de) 2010-05-15
AU2002328265A1 (en) 2003-10-27
WO2003086760A1 (fr) 2003-10-23
JP2005519794A (ja) 2005-07-07
DE10296772D2 (de) 2005-02-17
DE50214420D1 (de) 2010-06-17
RU2291058C2 (ru) 2007-01-10

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