DE102007059335A1 - Applicator with a forme cylinder and at least one applicator roll in a processing machine - Google Patents

Abstract

The invention relates to an application device having a forming cylinder (1) and at least one application roller (7-8) associated with the forming cylinder in a processing machine, wherein the forming cylinder comprises at least one cylinder channel (10), and a medium such as dye, fountain solution, or paint can be applied to the forming cylinder (1) by means of the at least one circumferentially elastic application roller (7-8), wherein the at least one application roller (7-9) comprises a roller core (13), wherein a first, compressible layer (14) made of a homogenous elastomer is adhesively disposed concentrically on the roller core (13), and a second, elastic layer (15) made of a homogenous elastomer, including a cover layer guiding the medium to be processed, is adhesively disposed on said first, compressible layer (14), and wherein the first, compressible layer (14) has a lower Shore-A hardness than the second, elastic layer (15).

Description

The The invention relates to an applicator device with a forme cylinder and at least one of the form cylinder associated applicator roll in a processing machine according to the preamble of claim 1. The processing machine is preferably a printing press with printing units and preferably combined with at least one coating unit or a painting machine with at least a coating plant. The applicator can be in a pressure and / or Be integrated coating unit.

An applicator of this kind is made EP-0 090 179 B1 for preventing roll tabs (in the printing result) in a roll mill of a printing press. Such roll strips result, for example, from impacts that occur during rolling of the rolls on a plate cylinder with at least one cylinder channel.

Around a uniform compressive stress between the plate cylinder and an associated applicator roll to ensure the applicator roller by resilient plungers stored against an adjacent, upstream roller and in addition These upstream roller are also resilient plungers assigned. The spring forces of all thrust pieces are designed so that the bearing clearance in each case at the applicator roll on the side facing away from the upstream roller and at the upstream Roller is displaced on the applicator roller side facing away.

adversely are herbei the relatively high device overhead and at higher Machine speeds and / or larger format widths of the Substrate insufficient damping behavior.

Out DE 93 10 713.7 U1 an inking roller is known, which is in functional connection with a forme cylinder with a clamping channel and which rolls on the forme cylinder with high damping and virtually vibration-free. This roller carries on a core an elastic compactor as color-leading cover layer. The roll core has in its contour to the clamping channel of the forme cylinder associated withdrawal (recess), which is filled by a thickening of the roll cover. In this case, the inking roller on its outer periphery on a completely cylindrical shell.

From Disadvantage here is the high production costs and the thickening the roller cover are always operated synchronously to the clamping channel got to. Furthermore, the achievable damping behavior is at higher machine speeds and / or larger Format widths of the substrate insufficient.

Out WO 03/103967 A1 is an application device for a printing / coating unit in a processing machine with at least one form cylinder associated applicator roller known. With the application device, the occurrence of shocks when passing through a cylinder channel can be reduced and the print quality can be further increased. For this purpose, the applicator roll on a roll core, on the roll core is concentrically arranged a compressible layer of a cellular foam material adherent and on the compressible layer leading to the processing medium, elastic cover layer is arranged adherent.

According to US 3,152,387 and US 5,257,967 A Rollers are known with a roll core having at least two concentric layers on the core. These layers are made of elastomeric materials with different hardness and lead to the surface of a fountain solution or a color.

Of the Invention is based on the object, an application device of the type mentioned above, the o. g. disadvantage avoids the particular occurrence of shocks in the passage of a cylinder channel and resulting rende roll strips reduced on the substrate and thus the duck quality further increased.

Solved The object is achieved by the training features of claim 1. Further developments emerge from the dependent claims.

One The first advantage is that the application device with at least one applicator roller and a forme cylinder with cylinder channel a noticeable improvement in damping behavior the resulting from the passage of a cylinder channel shocks having. By the formation of the applicator are no or only negligible low vibrations, Impacts, vibrations in the adjacent roll groups or Transfer cylinder and optionally side frames of the processing machine. Furthermore, the formation of roller strips on the printed product (substrate) avoidable and thus is an increase in print quality (Or coating quality) on the substrate feasible.

From Another advantage is that the application device with at least an applicator roll to operate a processing machine with increased machine speed, especially for larger Format widths of the substrates allowed, vibration-free.

One Another advantage is that the application device with at least one application roller universally on processing machines can be used with a forme cylinder and at least one cylinder channel is. Preferably, the applicator is as part of an inking unit, For example, offset and / or flexo color, can be used. Im by means of dampening solution Supported offset printing is the job device as well can be used as part of a dampening system. Furthermore, the application device Can be used as part of varnish or flexographic printing units. It is the at least one application roller always with a form cylinder or plate cylinder with at least one cylinder channel directly in functional connection.

Advantageous is also that the application device with at least one application roller, preferably in the inking and / or dampening unit, with the forme cylinder with at least one cylinder channel differing peripheral speed is operable. The application roller is frictionally engaged can be driven to the forme cylinder and the adjacent roller, for example the distributor roller, can be driven positively.

After all it is advantageous that the at least one application roller of the applicator when rolling over the entire roll circumference compressible is. The applicator roll in this case has a roll core, on the at least a first compressible layer concentrically adherent is arranged and on this compressible first layer is a second, elastic layer, including a cover layer, arranged concentrically adherent, wherein the cover layer to be processed Medium (paint, paint, dampening solution) leads.

At the Passing a cylinder channel of the forme cylinder emerges in such a way trained, at least one applicator roll in these and in the Channel edges. After passing the cylinder channel, including of the channel startup, specifically features the first, compressible layer the applicator roller a sufficiently elastic restoring force on, so that the roller basic adjustment in particular the predetermined Roll strip (roll provision) on the adjacent form cylinder is again ingestible. Preferably, several such applicator rollers are circumferentially directly to the forme cylinder with at least one cylinder channel assigned so that successively each of the applicator rollers after the Passing the cylinder channel a sufficiently elastic restoring force has for the purpose of re-taking the basic roll adjustment.

there is the first, compressible layer preferably in outer diameter cylindrically shaped. Alternatively, the outer diameter this layer may deviate from a cylindrical shape, for example a crown (with convex curvature) or another Have training.

alternative Likewise, the outer diameter of the roller core can be cylindrical or deviating from this form. Through such training Adjustments of the dampening over the format width can be realized.

The Invention is intended to be closer to an embodiment be explained. Here are shown schematically:

1 an offset printing unit,

2 a coating plant,

3 an application roller of the application device in cross section (side view),

4 , an application roller of the applicator in cross section (front view).

According to 1 is an offset printing unit with an inking unit 6 and if necessary a dampening unit 5 shown. The inking unit 6 has, inter alia, at least one color roller train, the end several applicator rollers as inking rollers 8th having. The inking rollers 8th can axially changeable and rotatably driven friction rollers 17 be upstream. The drives can be stopped if necessary.

In the present example are in the direction of rotation of a form here as a plate cylinder forme cylinder 1 four inking rollers on the circumference 8th immediately this form cylinder 1 frictionally assigned. Here is in the direction of rotation of the forme cylinder 1 the first and second inking rollers 8th together with an upstream first distributor roller 17 frictionally in contact and the third and fourth inking roller 8th is common with an upstream second Reiber roller 17 frictionally in contact. in the circumferential arrangement of several inking rollers 8th to the form cylinder 1 may preferably at least the first and second inking roller 8th with a distributor roller 17 be in touch.

The form cylinder 1 has at least one axially parallel cylinder channel 10 , For example, for receiving clamping means for fixing printing forms on. The form cylinder 1 is still with a blanket cylinder 2 and the blanket cylinder 2 is one with the substrate in the conveying direction 3 leading sheet guiding cylinder 4 , here designed as a pressure cylinder, in contact.

If necessary, for example offset printing supported by dampening solution, is in the direction of rotation of the form cylinder 1 the inking unit 6 a dampening unit 5 upstream. The dampening unit 5 has at least one with the forme cylinder 1 can be brought into contact application roller as dampening roller 7 which is in functional connection with an upstream dampening agent dosing system.

According to 2 is a coating unit, alternatively a flexographic printing unit, with a form cylinder 1 with at least one cylinder channel 10 and one with the form cylinder 1 operatively connected, the printing material leading sheet guiding cylinder 4 , shown here as a pressure cylinder, shown ..

The coating unit has at least one with the forme cylinder 1 contactable applicator roll 9 , here designed as a lacquer application roller, which, with a metering device 11 for the medium to be processed (flexographic ink, varnish), for example, a chambered doctor blade or roller system is coupled.

According to 3 is an applicator roll 7 . 8th . 9 or intermediate roller 19 (for use as a dampening roller 7 , Inking roller 8th , Paint application roller 9 or intermediate roller 19 ) shown in cross section. This applicator roll 7 to 9 or intermediate roller 19 has one around a roll axis 12 concentric roller core 13 (with end-mounted roll neck) as a carrier material. Preferably, the roll core 13 be formed of a metallic material, such as steel or aluminum. Alternatively, the roll core 13 be formed from a Koh lefaserverbundwerkstoff (CFRP material). In this case, the roll core 13 each formed of a solid material or a hollow cylindrical material.

On the roll core 13 is at least concentric a first, compressible layer 14 made of a homogeneous elastomer adherent, on the turn concentric a second elastic layer 15 is arranged adherent from a homogeneous elastomer. The surface of the second layer 15 is as a topcoat 16 ie the second layer 15 closes the cover layer 16 on, designates and guides the respective medium to be processed (paint, varnish, dampening solution). In this case, the first, compressible layer 14 a lower Shore A hardness than the second elastic layer 15 on.

The layers 14 . 15 preferably consist of a rubber material mixture. Here, the first, compressible layer includes 14 the applicator roll 7 to 9 or intermediate roller 19 a rubber compound with a hardness of 10 to ≤ 25 Shore-A. The second, elastic layer 15 the applicator roll 7 to 9 comprises a rubber compound with a hardness of> 25 to 50 Shore-A.

The thickness of the first, compressible layer is preferred 14 greater than the thickness of the second elastic layer 15 (with topcoat 16 ). For example, the second layer 15 (with topcoat 16 ) ≤ 5 mm and the first layer 14 is noticeably thicker.

Preference is given to several applicator rollers 7 to 9 the form cylinder 1 assigned directly to the periphery. At least one of the applicator rollers 7 to 9 has a roll core 13 of a metallic material and at least one further of the applicator rollers 7 to 9 a roll core 13 made of a CFRP material.

The second layers consisting of an elastomer, preferably in each case a rubber material 15 , especially their cover layers 16 , Preferably, depending on the application of the application rollers 7 to 9 or as an intermediate roller 19 Color, paint or fountain solution leading surface properties or wetting properties.

The first, compressible layer 14 is adherent, preferably by means of a first vulcanization, on the roll core 13 arranged. The concentric on the first, compressible layer 14 arranged second elastic layer 15 with cover layer 16 is preferably adherent to the first layer by means of a second vulcanization 14 arranged.

The layer structure of the applicator roll 7 to 9 or intermediate roller 19 is executable such that in a further development in addition between the first, compressible layer 14 and the second elastic layer 15 and / or between the first, compressible layer 14 and the roll core 13 at least in addition a layer of a fabric or a plastic, for. B. a film is arranged adherent. The position is preferred, for example between the roll core 13 and the first, compressible layer 14 , a concentrically arranged barrier layer 18 (or for improved adhesion), for example, from a rubber material.

In another embodiment, the applicator roll 7 to 9 or intermediate roller 19 formed as a sleeve and is thus sleeve-shaped as a sleeve on the roll core 13 removable and removable (not shown). Preferably, the material of the sleeve is made of a metal or a plastic. On the sleeve is again concentric the first, compressible layer 14 and concentric to this, the second elastic layer 15 (with topcoat 16 ) each adherent.

In a further development is between the sleeve and the first, compressible layer 14 and / or between the first, compressible layer 14 and the second elastic layer 15 with cover layer 16 at least in addition a layer of a fabric or a plastic, for. B. a film, or a rubber material adherent.

The barrier layer 18 or the additional layer preferably also serves as an adhesive layer for better connection of the first, compressible layer 14 with the roll core 13 or the sleeve.

The arrangement of the at least one applicator roller 7 to 9 as an inking roller 8th in the inking unit 6 is such that at least one of the four inking rollers 8th with first, compressible layer 14 and second, resilient layer 15 can be trained. The then remaining inking rollers may differ from this training. In 1 preferably have all four inking rollers 8th each the first, compressible layer 14 and the second elastic layer 15 (with topcoat 16 ), which noticeably increases the damping effect in the entire inking unit.

In a further embodiment, at least those of a common distributor roller 17 associated first and second (alternatively third and fourth) inking roller 8th with first, compressible layer 14 and adherent second, resilient layer 15 (with topcoat 16 ) educated.

The training of the applicator roller 7 to 9 is not on an inking unit 6 limited. In a further embodiment, the at least one dampening roller 7 a dampening unit 5 with a roll core 13 and concentrically and adherently disposed first, compressible layer 14 as well as on this layer 14 adherently arranged second elastic layer 15 with cover layer 16 be educated.

For printing units with inking and dampening units 7 . 8th per printing unit is a combination of at least one dampening roller 7 and several inking rollers 8th in each printing unit with this at least two-ply layer structure, formed from roll core 13 , first, compressible layer 14 and second, elastic layer 15 (with topcoat 16 ) feasible.

For coating units (alternatively flexographic printing units) is the applicator roll 9 with this at least two-ply layer structure, formed from roll core 13 , first, compressible layer 14 and second, elastic layer 15 (with topcoat 16 ) feasible. For this purpose, the applicator roll 9 a metering device 11 upstream.

Preference is given to several applicator rollers 7 to 9 the form cylinder 1 directly assigned on the periphery. In this case, at least one of the application rollers 7 to 9 A roller core 13 of a metallic material and at least one further of the applicator rollers 7 to 9 a roll core 13 made of a CFRP material.

Preference is given to several applicator rollers 7 to 9 the form cylinder ( 1 ) directly assigned circumferentially and all applicator rollers 7 to 9 have a roll core 13 made of a metallic material.

Preference is given to several applicator rollers 7 to 9 the form cylinder 1 circumferentially directly assigned and all applicator rollers 7 to 9 have a roll core 13 made of a CFRP material.

In a development, the application device can be at least one application roller 7 to 9 and additionally at least one, the applicator roll 7 to 9 the medium (paint, dampening solution, paint) to the applicator roll 7 to 9 feeding intermediate roll 19 exhibit. In the inking unit 6 , Dampening unit 5 or coating unit / flexographic printing unit is the intermediate roller 19 the at least one applicator roll 7 to 9 directly or indirectly upstream. In this case, the intermediate roller 19 a roll core 13 on and on the roll core 13 is concentric a first, compressible layer 14 is made of a homogeneous elastomer adherent and on this first, compressible layer 14 is a second, elastic layer 15 of a homogeneous elastomer, including a topcoat carrying the medium to be processed 16 , adherent. Here, the first, compressible layer 14 a lower Shore A hardness than the second elastic layer 15 on. The further roll construction is analogous to the above-mentioned embodiments of the applicator roll 7 to 9 ,

If necessary, the cover layer can or can 16 the second layer 15 and / or the surface of the first layer 14 (before the adhesive bond with the layer 15 ) a machining, ie a cutting shaping, for example by grinding, received.

The training of a job roller 7 to 9 is not on the described embodiment with roller core 13 , first and second layer 14 . 15 (with topcoat 16 ). Rather, such a mandrel 7 to 9 from a roll axis 12 or a roll core 13 be formed with on this or this end arranged bearings. The bearings preferably carry a rotatably mounted hollow cylindrical body, the layers 14 . 15 receives.

4 shows an example of a design of the applicator roll 7 to 9 ; 19 , which has a cylindrical roller core 12 , concentrically arranged on it first, compressible layer 14 and disposed thereon, the second elastic layer 15 with cover layer 16 having. Here is the first, compressible layer 14 with a convex curvature 20 educated. The curvature 20 can be generated for example by a grinding process and then the second layer 15 (with topcoat 16 ) on this layer 14 applied.

The mode of action is as follows:
During operation of the processing machine, the forme cylinder rotates 1 in the direction of rotation (arrow), so that at least one of the application rollers 7 to 9 on the form cylinder 1 rolls. Passing the cylinder channel 10 at the point of contact with at least one of the applicator rollers 7 to 9 becomes the impact initiated by the cylinder channel edges as a result of the layer structure, in particular the compressible layer 14 , the order roller 7 to 9 , almost completely compensated.

In the training with at least one intermediate roll 19 is initiated by the Zylinderkanalkanten, optionally in the inking unit 6 , Dampening unit 5 or coating unit / flexographic printing unit passed shock in particular by the compressible layer 14 the intermediate roller 19 compensated.

1

form cylinder (Plate cylinder)

2

Blanket cylinder

3

conveying direction

4

Sheet guiding cylinder

5

dampening

6

inking

7

Dampener roller

8th

Inking roller

9

applicator roll

10

cylinder gap

11

metering

12

roll axis

13

roll core

14

first layer

15

second layer

16

topcoat

17

distributor roller

18

junction

19

intermediate roll

20

curvature

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• EP 0090179 B1 [0002]
• DE 9310713 U1 [0005]
• WO 03/103967 A1 [0007]
• - US 3152387 [0008]
• - US 5257967 A [0008]

Claims (18)

Applicator with a forme cylinder and at least one mandrel associated with the form cylinder in a processing machine, wherein the forme cylinder comprises at least one cylinder channel and a medium such as paint, dampening solution or paint on the at least one circumferentially elastic applicator roll is fed to the forme cylinder, characterized in that the at least one application roller ( 7 to 9 ) a roll core ( 13 ), that on the roll core ( 13 ) concentrically a first, compressible layer ( 14 ) is adhered from a homogeneous elastomer and that on this first, compressible layer ( 14 ) a second elastic layer ( 15 ) of a homogeneous elastomer, including a top layer carrying the medium to be processed ( 16 ), and that the first, compressible layer ( 14 ) a lower Shore A hardness than the second, elastic layer ( 15 ) having. Applicator device according to claim 1, characterized in that the application roller ( 7 to 9 ) one with the forme cylinder ( 1 ) in contact dampening roller ( 7 ). Applicator device according to claim 1, characterized in that the application roller ( 7 to 9 ) at least one with the forme cylinder ( 1 ) in contact inking roller ( 8th ). Applicator device according to claim 1 and 3, characterized in that a plurality of inking rollers ( 8th ) the forme cylinder ( 1 ) are assigned and that in the direction of rotation of the forme cylinder ( 1 ) at least the first and second inking rollers ( 8th ) with a distributor roller ( 17 ) is in contact. Applicator device according to claim 1, characterized in that the application roller ( 7 to 9 ) one with the forme cylinder ( 1 ) in contact paint roller ( 9 ). Applicator device according to claim 1, characterized in that the first, compressible layer ( 14 ) of the applicator roll ( 7 to 9 ) is a rubber compound having a hardness of 10 to ≦ 25 Shore-A. Applicator device according to claim 1, characterized in that the second, elastic layer ( 15 ) of the applicator roll ( 7 to 9 ) is a rubber compound having a hardness of> 25 to 50 Shore-A. Applicator device according to claim 1, characterized in that the roller core ( 13 ) is formed of a metallic material. Applicator device according to claim 1, characterized in that the roller core ( 13 ) is formed of a CFRP material. Applicator device according to at least claim 1, characterized in that the applicator roller ( 7 to 9 ) sleeve-shaped sleeve on the roll core ( 13 ) is aufziehbar, wherein on a sleeve, the first, compressible layer ( 14 ) is arranged concentrically and on the first, compressible layer ( 14 ) the second elastic layer ( 15 ), including the top layer ( 16 ), is adherent. Applicator according to at least claims 1 and 10, characterized in that the application roller ( 7 to 9 ) between the roll core ( 13 ) and the first, compressible layer ( 14 ) or between the sleeve and the first, compressible layer ( 14 ) a barrier layer ( 18 ) having. Applicator device according to at least claim 1, characterized in that the first layer ( 14 ) by means of a first vulcanization adherent to the roll core ( 13 ) and the second layer ( 15 ), including the top layer ( 16 ), by means of a second vulcanization adherent on the first layer ( 14 ) is arranged. Applicator device according to at least claims 1 and 8 or 9, characterized in that the roller core ( 13 ) is formed of a solid material or a hollow cylindrical material. Applicator device according to at least claim 1, characterized in that the thickness of the first, compressible layer ( 14 ) greater than the thickness of the second elastic layer ( 15 ). Applicator according to at least claims 1 and 8 and 9, characterized in that a plurality of applicator rollers ( 7 to 9 ) the forme cylinder ( 1 ) are assigned directly to the circumference and that at least one of the application rollers ( 7 to 9 ) a roll core ( 13 ) of a metallic material and at least one further of the applicator rollers ( 7 to 9 ) a roll core ( 13 ) of a CFRP material. Applicator according to at least claims 1 and 8, characterized in that a plurality of applicator rollers ( 7 to 9 ) the forme cylinder ( 1 ) are assigned directly to the circumference and that all applicator rollers ( 7 to 9 ) a roll core ( 13 ) of a metallic material. Applicator according to at least claims 1 and 9, characterized in that a plurality of applicator rollers ( 7 to 9 ) the forme cylinder ( 1 ) are assigned directly to the circumference and that all applicator rollers ( 7 to 9 ) a roll core ( 13 ) of a CFRP material. Applicator device according to at least claim 1, characterized in that the application device has at least one applicator roller ( 7 to 9 ) and that the at least one application roller ( 7 to 9 ) one the medium to the applicator roller ( 7 to 9 ) feeding intermediate roll ( 19 ), wherein the intermediate roll ( 19 ) a roll core ( 13 ) and on the roll core ( 13 ) concentrically a first, compressible layer ( 14 ) is adhered from a homogeneous elastomer and that on this first, compressible layer ( 14 ) a second elastic layer ( 15 ) of a homogeneous elastomer, including a top layer carrying the medium to be processed ( 16 ), and that the first, compressible layer ( 14 ) a lower Shore A hardness than the second, elastic layer ( 15 ) having.