EP2576221B1 - Rotary printing machine having a forme cylinder and an inking unit positioned on said form cylinder - Google Patents

Description

The invention relates to a rotary printing press with a forme cylinder and an inking unit employed on this forme cylinder according to the preamble of claim 1.

By the EP 1 946 924 A2 is a rotary printing machine with a forme cylinder and employed on this forme cylinder inking unit, wherein the inking unit comprises a roller train with a film roll, wherein the inking unit in the axial direction of the film roller a plurality of juxtaposed ink zones, wherein a lateral surface of the film roller has a regular structure formed by grooves wherein the structure of the circumferential surface of the film roll is formed by a plurality of grooves which increase in a straight line parallel with respect to an axis of rotation of the film roll and a plurality of grooves which increase in the left in a straight line parallel with respect to the rotational axis of the film roll, a plurality of the right-rising grooves and a plurality of the grooves left-hand grooves are arranged crossing each other, wherein of grooves at least partially limited, each forming a part of the lateral surface of the film roll surfaces in their sum with respect to the as closed Hü assumed surface area of the film roll form a bearing ratio of 5% to 15%.

By the DE 10 2004 040 150 A1 a rotary printing machine with a forme cylinder and an inking unit employed on this forme cylinder is known, wherein the inking unit comprises a roller having a film roller and at least one further roller, said roller train at most along a transport path serving for the transport of ink, extending from the film roller to the forme cylinder has five nipples.

An inking unit with a maximum of five nip points in the compactor for ink to be transported to the forme cylinder is also referred to as a short inking unit. Under a nip is understood to be a substantially strip-shaped, but at least a linear contact area between a roller and an adjacent to this roller other roller or between a roller and the forme cylinder extending substantially in the axial direction of a roller, said in this contact area taking into account the gap law in the Inking ink is transferred from the one roller to the adjacent other roller or on the forme cylinder or is at least transferable. If in a short inking unit a roller, in particular a film roller with a structure formed on its lateral surface is in use or is used, this has the disadvantage that in the short compactor with at most five nip points to be transported ink is not sufficiently smoothed and evened out and therefore the structure of the lateral surface of the roll involved in the compactor during the transport of the printing ink, in particular the film roll, when coloring the forme cylinder, d. H. especially when coloring at least one arranged on the forme cylinder printing plate, at least partially images, which has a negative effect on the quality of the printed products to be produced in the printing process performed by the rotary printing press. In an inking unit with a roller train of more than five nipples, equalization of a color film coming from the ink fountain is much easier to accomplish. Due to the low number of rolls comparatively even little ink can be stored in a short inking unit, so that a short inking unit in the printing process is much more sensitive to insufficient supply of printing ink than an inking unit with a long compactor. With a short inking unit, there are therefore particular challenges in producing high-quality printed products.

By the DE 10 2004 057 142 A1 is known in a short inking unit between a Farbduktor and another inking roller oscillating back and forth However, it has been shown that in a high-speed rotary printing machine arranged in the roller of this inking rollers, a vibrating roller generates vibrations by their jerky motion, which also has a negative effect on the quality of the printing process performed by the rotary printing press Impact printed products.

By the EP 1 543 969 A1 It is known to arrange an anilox roller in a short inking unit, wherein this anilox roller has a regular structure on its lateral surface. The task of an anilox roller is to scoop ink from a printing ink-providing doctoring chamber with ink formed on its lateral surface and to feed it into the compactor of the short inking unit, wherein the doctoring chamber extends parallel to the anilox roller over the entire relevant for the printing process axial length of the anilox roller. The formed on the lateral surface depressions of the anilox roller are continuously filled in the printing process with a rotation of the anilox roller with ink, wherein excess, ie a scooping volume of the wells of the anilox roller exceeding inked doctored by the employee to the lateral surface of the anilox roller doctor of the doctoring chamber of this lateral surface of the anilox roller and usually the doctoring chamber is fed again. The squeegee of the doctoring chamber extends as well as the doctoring chamber itself evenly over the entire relevant for the printing process axial length of the anilox roller. Particularly wear-resistant embodiments of the lateral surface of an anilox roller are in the DE 10 2005 062 204 A1 described.

For many applications, however, it is desirable to equip a rotary printing press instead of an anilox roller and a doctoring chamber with an inking in the axial direction of the inked body of revolution having a plurality of color zones having inking so that the ink to be transported by the roller of the ink draw ink is metered zonewise. In such a case is in the relevant inking unit an ink fountain is provided, which in the axial direction of an employee of this ink fountain ink duct several, z. B. twenty, thirty or more side by side, ie arranged juxtaposed, each selectively adjustable metering, so-called ink knife has. This is in connection with a film roller having inking from the DE 10 2009 001 475 A1 known.

By the WO 2007/077053 A1 It is known in a film inking unit, ie in an inking unit with a film roll, to arrange this film roll adjacent to and axially parallel to the ink fountain roller of this inking unit, wherein between the lateral surface of the film roller and the lateral surface of the ink fountain a extending in the axial direction gap is formed, said gap a gap width in the range z. B. between 0.05 mm and 0.1 mm. The lateral surface of the film roller and the outer surface of the ink fountain roller are thus not in direct contact, but on the outer surface of the ink fountain roller applied ink is continuously milled in the printing process by the rotation of the film roll from the lateral surface of the lateral surface of the ink fountain roller.

By the DE 10 2004 003 424 A1 a film roller for a film inking unit of a printing machine is known, wherein the film roller for color transport with a Farbduktor cooperates, wherein between the film roll and Farbduktor a gap is provided and wherein the film roller has on its peripheral surface a regular surface structure, with which printing ink can be conveyed from the gap ,

In the WO 2008/017700 A1 there is described a rubber-coated ink transfer roller having a nonuniform surface structure with no grooves or rhombuses, a film inking unit being mentioned as the use for this roller.

By the EP 2 019 753 B1 a rotary printing machine with an inking unit with a film roll is known, wherein the film roll has a lateral surface with a stochastic Has structure, ie a lateral surface with an irregular distribution of this surface structuring elements, which usually have a non-uniform shape and also no particular preferred direction.

The invention has for its object to provide a rotary printing machine with a forme cylinder and an employee employed on these forme inking, wherein even at a transport speed of the printing material of at least 10 m / s or at least 15,000 sheets / hour on the forme cylinder for the quality of the printed product to be produced sufficient amount of ink is provided in a sufficiently homogeneous for the quality of the printed product surface distribution.

The object is achieved by the features of claim 1.

The achievable with the present invention consist in particular in that even in a high-speed rotary printing machine with a film roll having short inking unit, ie in a film inking unit with at most five Nippstellen in the compactor, for printing cylinder to be transported ink in which a layer thickness of the forme cylinder transporting printing ink in a plurality of ink zones each with a preferably remotely controllable metering is adjustable, ensuring the roll along the transport of a sufficient amount of ink in the respective ink zones a good smoothing and thus a sufficiently uniform application of ink on the forme cylinder or at least one on the Form cylinder arranged printing form can be produced. This means that a structure of the lateral surface of the film roller imaged in the ink roller received by the lateral surface of the film roller dissolves during the transport of the ink along the roller compactor at the latest until the transfer of this ink to the forme cylinder at least below a limit relevant to the quality of the printed product Has. This is required for the quality of the printed product Resolution of the image in the inking structure is thereby possible or is achieved by the fact that the inking structure of the lateral surface of the film roll is designed as such very fine. In a short inking unit with a maximum of five Nippstellen in the compactor required for the resolution in the ink fineness of the structure of the outer surface of the film roll that the lateral surface of this film roll grooves with a screen frequency in the range of 5 lines per centimeter to 20 lines per centimeter, wherein the structure formed by these grooves, the lateral surface of this film roll at the same time has a supporting content of at most 10%. The supporting portion reflects the area ratio of the entire surface of the film roll to a sum of those surfaces which formed on the lateral surface of this film roll, formed by different grooves at least partially limited surveys, ie these surfaces are each of at least one right-rising groove and at least one limited left-hand groove. Only partially limited by ridges or rimmed surveys are z. B. in the respective edge region of the lateral surface at the two front ends of the film roll. The raster frequency is a measure of the distances of these elevations, ie, this formed on the outer surface of the film roll raised surfaces which protrude in the network formed from the linear intersecting grooves, ie the grid. The raster frequency thus determines the division or distribution or the arrangement of the elevations on the lateral surface of the film roller. In order to ensure that a sufficient amount of ink is transported from the compactor to the forme cylinder or at least transportable, takes the film roll at its raised surfaces on its lateral surface per meter of its axial length between 50,000 mm ³ and 150,000 mm ³ ink, which a recorded or at least absorbable color volume between 50 ml and 150 ml.

Despite the fineness of the structure of the lateral surface of the film roll, this has a sufficiently good life and wear resistance, ie with the inventively designed lateral surface is in the printing process of the rotary printing machine a sufficiently high number of load changes of the film roll feasible, which contributes to the economics of this inking unit and thus ultimately to the efficiency of the rotary printing press. As a sufficient number of load changes, a range between 10 ⁶ and 10 ^{8 is} assumed.

In addition, are minimized by the inventive design of the lateral surface of the film roll, especially in a high-speed rotary printing machine frequently occurring paint spraying and misting. It is assumed that in a high-speed rotary printing press in the printing process, a printing material in the form of a material web with a transport speed of at least 10 m / s is passed through this rotary printing press. In the case of a formation of the printing material as a sheet, it is assumed that the high-speed rotary printing press prints at least 15,000 sheets / hour during the printing process.

Embodiments of the invention are illustrated in the drawings and will be described in more detail below.

Fig. 1

ein Kurzfarbwerk einer Rotationsdruckmaschine;

Fig. 2

einen Längsschnitt einer im Farbwerk gemäß Fig. 1 verwendeten Filmwalze;

Fig. 3

sechs Beispiele für einen Oberflächenaufbau der vorgenannten Filmwalze;

Fig. 4

eine perspektivische Darstellung der vorgenannten Filmwalze;

Fig. 5

einen teilweisen Querschnitt der vorgenannten Filmwalze;

Fig. 6

sich kreuzende Rillen der vorgenannten Filmwalze;

Fig. 7

ein Schnittprofil für in Radiusform ausgebildete Flanken der Rillen;

Fig. 8

ein Schnittprofil für in Evolventenform oder Zykloidenform ausgebildete Flanken der Rillen;

Fig. 9

ein erster flächiger Ausschnitt aus der Mantelfläche der Filmwalze;

Fig. 10

ein zweiter flächiger Ausschnitt aus der Mantelfläche der Filmwalze.

Show it:

Fig. 1

a short inking unit of a rotary printing machine;

Fig. 2

a longitudinal section of an inking according to Fig. 1 used film roll;

Fig. 3

six examples of a surface structure of the aforementioned film roll;

Fig. 4

a perspective view of the aforementioned film roll;

Fig. 5

a partial cross section of the aforementioned film roll;

Fig. 6

intersecting grooves of the aforesaid film roll;

Fig. 7

a sectional profile for formed in radius flanks of the grooves;

Fig. 8

a sectional profile for formed in involute or Zykloidenform flanks of the grooves;

Fig. 9

a first area cutout from the lateral surface of the film roll;

Fig. 10

a second planar section of the lateral surface of the film roller.

Fig. 1 shows an example of an employed on a forme cylinder 01 designed as a short inking inking unit 02 a rotary printing press. The rotary printing machine may be formed as a web-fed rotary printing press or as a sheet-fed machine. The rotary printing machine performs their printing process z. B. in an offset printing process. The offset printing can be carried out in a conventional method using a dampening solution or in a so-called waterless process without the use of a fountain solution, or at least can be carried out. Only for the sake of simplicity and without limitation to the so-called "dry offset" was in the Fig. 1 dispensed with the representation of an employee employed on the forme cylinder 01 or at least adjustable dampening. Likewise it was waived, in the Fig. 1 to represent a co-operating with the forme cylinder 01 transfer cylinder and an employee employed at this transfer cylinder impression cylinder, wherein a to be printed in the rotary printing material is printed in a gap formed by the transfer cylinder and the impression cylinder.

That in the Fig. 1 illustrated inking unit 02 has a roller train with a film roller 06 and at least one further roller, preferably with a plurality of other rollers on, wherein the roller train along a transport of ink serving, extending from the film roller 06 to the forme cylinder 01 transport path at most five nipples A; B; C; D has. In a preferred embodiment, printing ink provided in an ink fountain 03 is taken from it by means of a rotating ink ductor 04. The ink fountain 03 has arranged in the axial direction of cooperating with the film roller 06 Farbduktors 04 side by side a plurality of preferably remotely controllable adjustable metering, which belong to a preferably controllable Farbdosiersystem, wherein by means of these metering in juxtaposed ink zones each have a layer thickness of the roller to the forme cylinder 01 to be transported ink is adjustable. The Farbduktor 04 is arranged axially parallel to the film roller 06, wherein between a lateral surface of the film roller 06 and a lateral surface of the ink fountain roller 04 is formed in the axial direction extending gap 07, said gap 07 a gap width w in the range z. B. between 0.05 mm and 0.1 mm. In an alternative embodiment, the inking unit 02 is designed as a pumping inking unit with a zonal ink supply, in which ink is applied by means of a pump system to the outer surface of the ink fountain roller 04.

In the in the Fig. 1 example shown, the film roller 06 is at a first nip A in contact with a further inking roller 08, which z. B. is formed as a central roller and of which several, z. B. two further transport of the ink serving transport routes lead to the forme cylinder 01. Each of these transport routes has z. B. an ink driver 09 and at least one inking roller 11, wherein the ink driver 09 is set in each case in a given by a Nippstelle B touch contact to the formed as a central roller inking roller 08. The respective inking roller 11 is employed on the one hand in a given by a Nippstelle C touch contact to the respective ink driver 09 and on the other hand in a given by a Nippstelle D touch contact to the forme cylinder 01. The transport for the Form cylinder 01 to be transported ink thus leads for both in the Fig. 1 illustrated transport paths each have at most five Nippstellen A; B; C; D, wherein at each nip A; B; C; D is transferred in each case taking into account the gap law ink from the one roller to the adjacent other roller or on the forme cylinder or is at least transferable. The in the Fig. 1 Concretely illustrated transport routes relate specifically to a first inking train with four nipples and a second inking train with five nipples each between the film roller 06 and the forme cylinder 01.

The lateral surface at least of the at least one inking roller 11 or the respective lateral surface of each of the inking rollers 11 is made of an elastomer material, for. B. formed rubberized. In the inking unit 02, the film roller 06 is either frictionally driven by the hereafter in the roller train inking roller 08 - here the central roller - friction-driven or the Film roller 06 is connected to a drive, in particular with a drive assigned to it alone, wherein this drive z. B. is designed as a controllable at least in its speed electric motor. Alternatively, the film roller 06 may be driven by a Zahnradzug, said gear train with a drive z. B. is connected to the forme cylinder 01 or for cooperating with this forme cylinder 01 transfer cylinder.

Fig. 2 shows a longitudinal section through a film roller 06, as this z. B. in a in the Fig. 1 arranged inking 02 is arranged or at least can be arranged there. The film roller 06 has an axial length l06 in the range z. B. from 1,000 mm to 2,600 mm, in particular in the range of 1300 mm to 2400 mm. Their outer diameter d06 is in the range z. B. of 80 mm and 300 mm, in particular in the range of 120 mm and 250 mm. The film roller 06 has a z. B. tubular body 12 made of a metallic, z. B. iron, steel, aluminum or copper, or from a non metallic material, eg. B. of a plastic, in particular CFRP on. The lateral surface of the film roller 06 is preferably formed by a coating 13 applied at least to the base body 12, wherein this coating 13 may be single-layered or multi-layered. This coating 13 has in the radial direction of the base body 12 a layer thickness in the range z. B. from 0.5 mm to 2.0 mm and is preferably z. B. at about 1 mm. The thinner the layer thickness of the coating 13 is formed, the harder the material is formed of which this coating 13 consists.

Fig. 3 shows in exemplary illustrated sections a) to f) each have a surface structure of the film roller 06th Fig. 3a relates to a film roller 06 with an uncoated base body 12, said base body 12 z. B. made of aluminum or copper. According to Fig. 3b is on the z. B. made of aluminum or copper base body 12 of the film roller 06 in particular the wear resistance increasing protective layer 14 z. B. formed of alumina. In any case, the surface of the film roller 06 which comes into contact with the ink is formed from the choice of the material in an oleophilic, ie color-friendly, state. In the example of Fig. 3c is the main body 12 of the film roller 06 z. B. made of iron, steel, aluminum or copper, wherein on this base body 12, a coating 13 z. B. made of Rilsan or copper. Also the in Fig. 3c shown surface structure of the film roller 06 may additionally a particular wear resistance increasing protective layer 14 z. B. of alumina, as shown in the Fig. 3d is shown. If the main body 12 of the film roller 06 made of a non-metallic material, in particular of a plastic such. B. CFK, is on the body 12 preferably first a liability-increasing layer 16, a so-called primer, applied before - as in the aforementioned examples - a coating 13 z. B. from Rilsan or copper is formed ( Fig. 3e ). The adhesion-increasing layer 16 is z. B. from a ductile metal, which selected from the group of copper, nickel, iron, lead and tin and by plasma spraying or Flame spraying is applied, such as such adhesion-increasing layer 16 z. B. off DE 10 2005 008 487 B4 is known. Fig. 3f then shows a z. B. CFK existing body 12 of the film roller 06, on the first a liability-increasing layer 16 and then the coating 13 z. B. made of Rilsan or copper, wherein on the coating 13 in particular a wear resistance increasing protective layer 14 z. B. is applied from alumina.

Fig. 4 shows in a simplified perspective view of the film roller 06, wherein its lateral surface has a regular structure. This structure is formed by a plurality of right-angled grooves 18 extending parallel to each other with respect to a rotation axis 17 of the film roll 06 and a plurality of grooves 19 which are left-rising parallel to each other with respect to the rotation axis 17 of the film roll 06. Both the right-rising grooves 18 and the left-rising grooves 19 each have a regular pitch a18 and a19 in the axial direction of the film roller 06, and the pitch a18 for the right-pitch grooves 18 and the pitch a19 for the left-pitch grooves 19 may be equal or unequal , In a preferred embodiment, the pitch a18 for the right-rising grooves 18 is in the range of z. B. 0.5 mm to 2 mm, preferably from 1 mm to 2 mm, and the pitch a19 for the left-rising grooves 19 in the range of z. B. 0.625 mm to 2.5 mm, preferably from 1.25 mm to 2.5 mm. By the respective regular division a18 and a19, the grooves 18; 19 each arranged equidistant. The right-rising grooves 18 have respect to the axis of rotation 17 of the film roll 06 an angle α, ie a pitch angle, said angle α in the range z. B. from 45 ° to 70 °, preferably between 50 ° and 65 °. The left-rising grooves 19, relative to the axis of rotation 17 of the film roller 06 also have an angle β, ie a pitch angle, wherein this angle β also in the range z. B. from 45 ° to 70 °, preferably between 50 ° and 65 ° ( Fig. 6 ). Several of the right-rising grooves 18 and a plurality of the left-rising grooves 19 are thus arranged crossing each other, wherein between a pair of adjacent right-increasing grooves 18 and a pair of adjacent linkssteigender Grooves 19 each have a projection 21 and a raised surface is formed, since the grooves 18; 19 are each introduced as depressions in the lateral surface of the film roller 06. As shown in the one partial cross-section of the film roller 06 Fig. 5 is exemplified, the between the grooves 18; 19 formed elevations 21 on an envelope surface 22 of the lateral surface of the film roller 06 in the circumferential direction has a width b21. In the axial direction of the film roller 06, the elevations 21 extend between adjacent grooves 18; 19 each over a length 121 ( Fig. 4 ). Due to their length 121 and width b21, the elevations 21 each span a preferably diamond-shaped surface. Other embodiments of the respective surface of the film roller 06 belonging surface of each of these elevations 21 are z. B. linear or even punctiform. A sum over all surfaces of the projections 21 formed on the lateral surface of the film roller 06 is referred to as the support component of this film roller 06. Based on a self-contained envelope surface 22 of the lateral surface of the film roller 06, the carrying fraction of the film roller 06 according to the invention is at most 10%. In order to produce a printed product with printed images with a high print quality, ie with printed images with sharp, clear contours, it is advantageous to make the support portion of the film roller 06 as small as possible, in particular less than 10%, preferably less than 5%, even less than 1%. Because of the screening of the lateral surface of the film roller 06 and simultaneous formation of a supporting portion of at most 10% is formed on the lateral surface of the film roller 06 has a very fine structure formed on the outer surface of the film roller 06 elevations 21, wherein formed on the outer surface of the film roller 06 Surveys 21 transferred with their respective surface ink from this film roll 06 on at least one next roller in the roller train or on the forme cylinder. A bearing ratio of 0% or less means that a nominal dimension for the outer diameter d06 of the film roller 06 is undershot. Therefore, it is envisaged that the supporting portion of the film roller 06 coming from the positive percentage range approaching the 0% limit, but this limit is neither reached nor below.

The grooves 18; 19 have in the cross-sectional view of the film roller 06 each have a width b18 and b19 and a groove depth t18 and t19, wherein the groove depth t18 or t19 in the range z. B. from 0.05 mm to 0.60 mm, preferably from 0.15 mm to 0.40 mm. The grooves 18; 19 are z. B. each as a in its cross section with a circular arc in the outer surface of the film roller 06 dipping circle segment with a radius R18 or R19 in the range z. B. from 0.2 mm to 1.0 mm. The surface contributing to the respective groove 18 from the respective support portion contributing to the respective elevation 21; 19 sloping flanks 23 ( Fig. 5 However, in addition to a radius shape, each can also have an involute shape or a cycloid shape. Fig. 7 and 8th show for the otherwise same film roller 06 each one shown in Cartesian coordinates cutting profile for in radius ( Fig. 7 ) formed flanks 23 of the grooves 18; 19 and in involute or cycloid form ( Fig. 8 ) formed flanks 23 of the grooves 18; 19, wherein on the ordinate of the section profile in each case the respective groove depth t18 or t19 is plotted in micrometers and along the abscissa, the length of the relevant section profile also in microns, said in the Fig. 7 and 8th sectional profile shown in each case parallel to one of the grooves 18; 19 runs. The flanks 23 of the grooves 18; However, 19 are also formed ebenflächig, so that for the grooves 18; 19 in their respective cross-section z. B. gives a rectangular shape, a triangular shape or a trapezoidal shape. The grooves 18; 19 are on the lateral surface of the film roller 06 z. B. produced by the machining step of turning or milling.

FIGS. 9 and 10 show by way of example in each case a planar section of the respective lateral surface of the film roller 06, wherein the two film rollers 06 differ in the structure of their respective lateral surface. Fig. 9 shows elevations 21 with diamond-shaped surfaces, which define in their sum for this film roller 06 has a support share of 10%. Fig. 10 shows elevations 21 with more linear surfaces, which define a contribution of 0.5% in their sum for this film roller 06. The division a18 for the right-hand grooves 18 and the pitch a19 for the left-rising grooves 19 are the same in both illustrated film rollers 06, wherein the respective axial pitch of these grooves 18; 19, ie the division a18 or a19, each z. B. is in the range of 1 mm to 1.25 mm. Similarly, in both illustrated film rolls 06 of the rotational axis 17 of the film roll 06 related angle α for the right rising grooves 18 and the rotational axis 17 of the film roll 06 related angle β for the left rising grooves 19 are equal. However, the radii R18 and R19 of the respectively circular arc-shaped grooves 18 are chosen differently. 19, where in the Fig. 10 the radii R18 and R19 of the grooves 18; 19 are each twice as large as the corresponding radii R18 or R19 in the Fig. 9 illustrated grooves 18; 19th

Taking into account the requirements of a film roller 06, that this film roller 06 per meter of its axial length l06 receives and transports an amount of ink between 50,000 mm ³ and 150,000 mm ³ and the outer surface of this film roller 06 without limiting its usefulness between 10 ⁶ and 10 ⁸ load changes As well as the fact that this film roll 06 is used in a high-speed rotary printing machine with a transport speed of at least 10 m / s or at least 15,000 sheets / hour, wherein color fogging and ink spraying are to be kept as low as possible, it is proposed that the inking unit of these Form rotary printing machine as a short inking unit and the one through grooves 18; Formed 19 having structure having lateral surface of the film roll 06 of this short inking unit with a supporting content of at most 10%, wherein the lateral surface of the film roller 06 is formed of a harder material, the lower the supporting portion of this lateral surface. The lateral surface of this film roller 06 has a regular structure, which is preferably formed of a plurality of right-rising grooves 18 and a plurality of left-rising grooves 19, each bounded by a pair of right-rising grooves 18 and a pair of left-rising grooves 19 a survey 21 with a to Formed lateral surface of the film roller 06 belonging surface becomes. The sum of the respective area of all formed on the lateral surface of the film roller 06 elevations 21 forms the respective carrying portion of the respective film roller 06. To meet the above requirements for a film roller 06, the lateral surface of the film roller 06 is formed depending on their carrying component in a certain minimum hardness, the following information on the hardness in each case in HV10 (hardness Vickers with a Prüfmitteldurchmesser of 10 mm) according to DIN EN ISO 6507-1 or DIN 50133 done. For the preferred embodiment of the film roller 06 it is assumed that the right-rising grooves 18 a related to the axis of rotation 17 of the film roll 06 angle α and the left-rising grooves 19 on the rotation axis 17 of the film roll 06 related angle β in the range between 50 ° and 65 °, wherein the angle α for the right-rising grooves 18 preferably differs from the angle β for the left-rising grooves 19. According to the invention, the lateral surface of the film roller is formed differently hard, depending on its supporting component, in the manner described below.

For a bearing ratio in the range between greater than 0% and up to 1%, the lateral surface of the film roller 06 has a hardness of at least 500 HV10. This surface hardness is z. B. achieved in that the applied to the base body 12 of the film roller 06 coating 13 is formed as a ceramic coating. Such a coating 13 is z. B. applied by plasma coating. Suitable materials are for. As NiCr80 / 20, Cr ₂ O ₃ , Al ₂ O ₃ or a non-oxide ceramic such. B. Si ₃ N ₄ . Alternatively, a coating z. B. by a PVD method (Physical Vapor Deposition) or a CVD method (Chemical Vapor Deposition) applied, wherein a PVD method at least the outer surface of the film roll 06 to 200 ° C and a CVD method between 600 ° C. and 1000 ° C For use in a PVD process or in a CVD process, in particular nitrides are suitable as materials, eg. TiN, TiAIN, TiCN or CrN. However, it can also carbides such. As DLC (Diamond Like Carbon), DNC, WC / C or such complex materials are used, which are known under the trade name Balinit and Tribocoat. The required Surface hardness of at least 500 HV10 can also be achieved that on the outer surface of the film roller 06 z. As hard anodized aluminum or a hard metal is applied. For this is z. As a chemical deposition of nickel or a hard chrome electroplating suitable.

For a bearing ratio in the range between greater than 1% and up to 5%, the lateral surface of the film roll 06 has a hardness in the range of more than 100 HV10 and less than 500 HV10. To achieve this surface hardness is at least the lateral surface of the film roller 06 z. B. formed of a hardened steel. In the presence of lower requirements, the lateral surface of the film roller 06 may also be made of a low or unalloyed steel such. B. St37 be formed. If metallic non-ferrous materials are to be used, the lateral surface of the film roller 06 z. As copper or an aluminum alloy such. B. AlZnMgCu trained.

For a bearing ratio in the range between more than 5% and at most 10%, the lateral surface of the film roller 06 has a hardness in the range of at least 30 HV10 to 100 HV10. This means that for the formation of the lateral surface of the film roller 06, d. H. in particular for the formation of the coating 13, z. B. plastic coatings are used. As plastics z. As a polyamide such as Rilsan or PI, ABS, CA or PVC-U suitable. In certain cases, the lateral surface of the film roller 06 is also using a thermoset such. B. EP or UP trained. The lateral surface of the film roller 06 may also by an elastomer such. B. EPDM, BR, PUR or PU. Typical materials here are polyurethane or hard rubber.

Furthermore, in addition to the dependent on the supporting portion choice of material for the lateral surface of the film roller 06 is provided, the lateral surface of the film roller 06 depending on their supporting portion and their axial direction of this film roller 06 pitch a18 or a19 with respect to the geometric data of the grooves 18; 19 different form.

At a carrying ratio between greater than 0% and up to 1% and a pitch a18 for the right-rising grooves 18 of z. B. 1 mm and at a pitch a19 for the left-rising grooves 19 of z. B. 1.25 mm, the radius R18 for the right rising grooves 18 z. B. 0.6 mm at a groove depth t18 of 0.20 mm, wherein the left-rising grooves 19 has a radius R19 of z. B. 0.8 mm with a groove depth t19 of 0.15 mm. Likewise, for the same fraction and divisions a18; a19 the radius R18 for the right rising grooves 18 also z. B. 0.45 mm at a groove depth t18 of 0.30 mm, wherein the left-rising grooves 19 has a radius R19 of z. B. 0.6 mm with a groove depth t19 of 0.22 mm.

With a bearing ratio between greater than 1% and up to 5% and a pitch a18 for the right-rising grooves 18 of z. B. 1 mm and at a pitch a19 for the left-rising grooves 19 of z. B. 1.25 mm, the radius R18 for the right rising grooves 18 z. B. 0.6 mm at a groove depth t18 of 0.15 mm, wherein the left-rising grooves 19 has a radius R19 of z. B. 0.8 mm at a groove depth t19 of 0.10 mm. Likewise, for the same fraction and divisions a18; a19 the radius R18 for the right rising grooves 18 also z. B. 0.45 mm at a groove depth t18 of 0.22 mm, wherein the left-rising grooves 19 has a radius R19 of z. B. have 0.6 mm with a groove depth t19 of 0.15 mm.

With a bearing ratio between greater than 5% and up to 10% and a pitch a18 for the right-rising grooves 18 of z. B. 1 mm and at a pitch a19 for the left-rising grooves 19 of z. B. 1.25 mm, the radius R18 for the right rising grooves 18 z. B. 0.6 mm at a groove depth t18 of 0.10 mm, wherein the left-rising grooves 19 has a radius R19 of z. B. 0.8 mm at a groove depth t19 of 0.05 mm. Likewise, for the same fraction and divisions a18; a19 the radius R18 for the right rising grooves 18 also z. B. 0.45 mm at a groove depth t18 of 0.15 mm, wherein the left-rising grooves 19 has a radius R19 of z. B. 0.6 mm with a groove depth t19 of 0.12 mm. Furthermore, for the same carrying percentage and the same pitches a18; a19 the radius R18 for the right rising grooves 18 also z. B. 0.30 mm at a groove depth t18 of 0.35 mm, wherein the left-rising grooves 19 has a radius R19 of z. B. 0.4 mm at a groove depth t19 of 0.20 mm.

At a carrying ratio between greater than 0% and up to 1% and a pitch a18 for the right-rising grooves 18 of z. B. 2 mm and at a pitch a19 for the left-rising grooves 19 of z. B. 2.5 mm is the radius R18 for the right-rising grooves 18 z. B. 1.2 mm at a groove depth t18 of 0.35 mm, wherein the left-rising grooves 19 has a radius R19 of z. B. 1.6 mm with a groove depth t19 of 0.28 mm. Likewise, for the same fraction and divisions a18; a19 the radius R18 for the right rising grooves 18 also z. B. 0.90 mm at a groove depth t18 of 0.55 mm, wherein the left-rising grooves 19 have a radius R19 of z. B. 1.2 mm at a groove depth t19 of 0.44 mm.

With a bearing ratio between greater than 1% and up to 5% and a pitch a18 for the right-rising grooves 18 of z. B. 2 mm and at a pitch a19 for the left-rising grooves 19 of z. B. 2.5 mm is the radius R18 for the right-rising grooves 18 z. B. 1.2 mm at a groove depth t18 of 0.28 mm, wherein the left-rising grooves 19 has a radius R19 of z. B. 1.6 mm with a groove depth t19 of 0.20 mm. Likewise, for the same fraction and divisions a18; a19 the radius R18 for the right rising grooves 18 also z. B. 0.90 mm at a groove depth t18 of 0.44 mm, wherein the left-rising grooves 19 has a radius R19 of z. B. 1.2 mm at a groove depth t19 of 0.30 mm.

With a bearing ratio between greater than 5% and up to 10% and a pitch a18 for the right-rising grooves 18 of z. B. 2 mm and at a pitch a19 for the left-rising grooves 19 of z. B. 2.5 mm is the radius R18 for the right-rising grooves 18 z. B. 1.2 mm at a groove depth t18 of 0.20 mm, wherein the left-rising grooves 19 has a radius R19 of z. B. have 1.6 mm at a groove depth t19 of 0.15 mm. Likewise, for the same fraction and divisions a18; a19 the radius R18 for the right rising grooves 18 also z. B. 0.90 mm at a groove depth t18 of 0.30 mm, wherein the left-rising grooves 19 have a radius R19 of z. B. 1.2 mm at a groove depth t19 of 0.21 mm. Furthermore, for the same carrying percentage and the same pitches a18; a19 the radius R18 for the right rising grooves 18 also z. B. 0.60 mm at a groove depth t18 of 0.50 mm, wherein the left-rising grooves 19 has a radius R19 of z. B. 0.8 mm with a groove depth t19 of 0.40 mm.

The above examples illustrate that the radii R18; R19 or widths b18; b19 of the respective grooves 18; 19 in their respective numerical value ranging between 30% and 65% of their respective divisions a18; a19 are formed, wherein a numerical value for the groove depth t18; t19 of the respective grooves 18; 19 inversely proportional to their associated width b18; b19 or radii R18; R19 is selected, the groove depth t18; t19 preferably in the range between 5% and 60% of the numerical value of the radii R18; R19 of the respective grooves 18; 19 is formed. The larger the number of radii R18; R19 or widths b18; b19, the flatter these grooves 18 are accordingly; 19 due to their small groove depth t18; t19 trained. Instead of the radii R18 given in the preceding examples; R19 could also each have the respective width b18; b19 of the respective grooves 18; 19 are given, wherein a numerical value for the respective width b18; b19 z. B. from twice the size of the respective radius R18; R19 results.

LIST OF REFERENCE NUMBERS

01

form cylinder

02

inking

03

paintbox

04

ink fountain roller

05

-

06

film roller

07

gap

08

Inking roller

09

ink distributor

10

-

11

Inking roller

12

body

13

coating

14

protective layer

15

-

16

(Pressure-sensitive) layer

17

axis of rotation

18

groove

19

groove

20

-

21

survey

22

envelope

23

flank

A

nip point

B

nip point

C

nip point

D

nip point

a18

division

a19

division

b18

width

b19

width

b21

width

d06

diameter

I06

length

I21

length

R18

radius

R19

radius

t18

groove depth

t19

groove depth

w

gap width

α

angle

β

angle

Claims (10)

1. Rotary printing press having a forme cylinder (01) and an inking unit (02) placed on this forme cylinder (01), the inking unit (02) having a drum roller having a film roll (06) and at least one further roll (08; 09; 11), the inking unit (02) having a number of inking zones arranged next to each other in the axial direction of the film roll (06), a lateral surface of the film roll (06) having a regular structure formed by grooves (18; 19), the structure of the lateral surface of the film roll (06) being formed by a number of grooves (18) ascending to the right running linearly parallel to each other with respect to an axis of rotation (17) of the film roll (06) and by a number of grooves (19) ascending to the left running linearly parallel to each other with respect to the axis of rotation (17) of the film roll (06), a number of the grooves (18) ascending to the right and a number of the grooves (19) ascending to the left being arranged crossing each other, in each case surfaces in each case forming a part of the lateral surface of the film roll (06) being limited in their total with respect to the lateral surface of the film roll (06) assumed as a closed envelope forming a contact ratio of at most 10% by at least one groove ascending to the right (18) and by at least one groove (19) ascending to the left, characterized in that the drum roller serving for the transport of printing ink along a transport path extending from the film roll (06) to the forme cylinder (01) has five nip points (A; B; C; D), the lateral surface of the film roll (06) having a contact ratio in the range between more than 5% and at most 10% and consisting of a material having a hardness of at least 30 HV10 to 100 HV10.
2. Rotary printing press according to Claim 1, characterized in that the surfaces in each case formed between a pair of adjacent grooves (18) ascending to the right and a pair of adjacent grooves (19) ascending to the left are in each case formed as an elevation (21), by means of these elevations (21) formed on the lateral surface of the film roll (06) printing ink being transferable from this film roll (06) to at least one roll next in the drum roll of the printing couple (02) or being transferable to the forme cylinder (01).
3. Rotary printing press according to Claim 1 or 2, characterized in that both the grooves (18) ascending to the right as well as the grooves (19) ascending to the left in each case have a regular partition (a18; a19) in the axial direction of the film roll (06).
4. Rotary printing press according to Claim 3, characterized in that a respective width (b18; b19) of the grooves (18; 19) concerned in its respective numerical value is formed in the range between 30% and 65% of its respective partition (a18; a19).
5. Rotary printing press according to Claim 1 or 2 or 3, characterized in that both the grooves (18) ascending to the right as well as the grooves (19) ascending to the left in each case have a groove depth (t18; t19) in the range from 0.05 mm to 0.60 mm.
6. Rotary printing press according to Claim 5, characterized in that a numerical value for the groove depth (t18; t19) of the grooves (18; 19) concerned is chosen to be inversely proportional to the numerical value of the associated width (b18; b19).
7. Rotary printing press according to Claim 5, characterized in that the groove depth (t18; t19) is formed in the range between 5% and 60% of the numerical value of the width (b18; b19) of the grooves (18; 19) concerned.
8. Rotary printing press according to Claim 1 or 2 or 3, characterized in that the grooves (18) ascending to the right have a radius (R18) and the grooves (19) ascending to the left have a radius (R19), these grooves (18; 19) in each case being formed as a segment of a circle with its respective radius (R18; R19) in the range from 0.2 mm to 1.0 mm in each case dipping in its cross-section with an arc of a circle into the lateral surface of the film roll (06).
9. Rotary printing press according to Claim 1 or 2 or 3 or 8, characterized in that the width (b18; b19) of the grooves (18; 19) and their respective groove depth (t18; t19) are formed depending both on the contact ratio as well as on the partition (a18; a19) of the grooves (18; 19) running in the axial direction of this film roll (06).
10. Rotary printing press according to Claim 1 or 2 or 3 or 8 or 9, characterized in that at least the lateral surface of the film roll (06) is formed from a polyamide or from a thermosetting plastic or from an elastomer.

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