EP2156951A2 - Temperable roller - Google Patents

Abstract

The roller or cylinder has a rolling or cylinder body (10) and an internal element that partly consists of a foamed metal. The structure of the foamed metal is open porous and is flowed through at a moderate temperature. The rolling or cylinder body has an outside full-metallic hollow cylinder (11), in which an internal element is arranged. An independent claim is included for a method for producing a roller or a cylinder for use in a printer, converter or a varnishing machine.

Description

The invention relates to a heatable roller according to the preamble of claim 1 and to a method for producing such a roller according to the preamble of claim 15.

Depending on the technical design, printing presses and converter machines for the transport and further processing of web-shaped or sheet-like material have a number of different rollers, such as pressure rollers, ink rollers, counter-pressure rollers or deflection rollers.

Depending on the respective function of the roll used for this purpose, for example, the diameters of such rolls vary from a few centimeters in diameter, for example in deflection rolls up to about 500 mm in diameter, or more in pressure rolls or inking rolls or counter-pressure rolls.

While pure deflection rollers with a small diameter usually consist of a turned and / or ground metal tube, for example an aluminum tube or of a solid material, for example aluminum, rolls with a larger diameter such as pressure rollers are usually made of steel and usually consist of a hollow cylinder at the Ends corresponding shaft pieces are flanged with trunnions.

The reason for this is on the one hand a weight saving compared to a solid cylinder and on the other hand, these cylinders are often operated tempered by a cooling liquid is passed through the interior of the cylinder.

Due to the mechanical accuracies with regard to concentricity, deflection, imbalance, etc. required for the production process, a certain minimum thickness of the cylinder wall can not be undershot, so that despite their hollow construction, the rollers have a considerable weight of sometimes several hundred kilograms.

In addition, due to the structure of these rollers, the mass distribution is almost exclusively given in the shell region of the roller, resulting in the operation of the rollers to a considerable torque and moment of inertia of the roller, so that on the one hand the drives for the rollers must be designed accordingly strong and on the other the dynamic behavior of such rolls is unsatisfactory in a load change and / or speed change.

In addition, rollers, in particular pressure rollers and ink rollers, in particular of sheet-fed presses in recesses of the lateral surface devices for holding and / or tensioning sheets, blankets or clichés, whereby at least the wall thickness of the roller must be reinforced in this area in total to the said devices in take a way that they can not protrude beyond the lateral surface of the roller or only in certain rotational angle ranges of the roller, for which the said devices are driven by a corresponding control.

Such devices may for example also represent gripper elements, eg. on a transfer drum, whereby the sheets to be printed or already printed are transported in a sheet-fed printing press from a printing unit to a subsequent processing station. For this purpose, for example, in a recess of the lateral surface parallel to the axis of rotation of the roller a number of gripper elements are movably arranged, which, for example, within a certain rotational angle range of the roller from its recess, for example via a cam controlled, moved out, so that a sheet leading edge can be detected by means of the gripper elements and, for example, the sheet are thereby removed from a previous printing unit or a feed unit and can be fed to a subsequent printing unit.

For receiving and mechanically controlling such movably mounted elements, the wall of the roller must be reinforced at least in this area, in particular in order to be able to meet the required accuracies, for example positioning accuracies. If such rolls are made of solid and dimensionally stable steel, as is generally the case, then such rolls - as already mentioned - have a high weight and a high mass inertia, which requires powerful drives.

A disadvantage of the use of said roller body of the known type is further that when replacing such rollers, for example, to perform a format change, these can be difficult to change with appropriate lifting equipment and with increased expenditure of time due to their high weight, whereby the downtime of the printing machine crucial is extended.

In addition, the use of such mass amounts, heavy rolls not insignificant safety problems, especially in the case of an emergency stop, as heavy, massive rollers can be stopped extremely difficult and expensive means in the shortest possible time.

By the DE 10 2004 055 833 A1 is a roll of a printing press with an outer, a surface of the roll forming tubular shell and a shell enclosed by the tubular shell of a metal foam, wherein the core of the foamed material is tubular and wherein within the core, a further tube is arranged , Optionally, a groove is introduced as a flow channel in the metal foam.

The object of the invention is therefore to provide a roller body and / or a roller, which has a significantly reduced weight and thus a significantly reduced torque and moment of inertia. The object of the invention is also to provide a roller which can have a high concentricity and dimensional stability. The object of the invention is also to provide a roller which can be tempered in a simple and familiar manner by means of a cooling liquid. The object of the invention is also to provide a roller body or a roller, which may have in its lateral surface recesses for receiving movably mounted elements. The object of the invention is also to provide a method for producing such rolls.

The objects are achieved in that the roller body is constructed as a sandwich of at least two coaxially arranged cylindrical elements whose respective inner and outer surfaces at least partially contact each other and in which at least one inner element consists at least partially of a foamed metal. Thus, by means of such a roller body by the sandwich construction with a lower material input high mechanical strength and due to the use of foamed metal a lower weight compared to known rolls achieved.

The core idea of the invention is to construct the roll body of the roll from a sandwich structure and preferably to produce the respective layers essentially from a light metal, whereby in a first aspect the total weight of the roll is considerably reduced due to the use of light metals.

Another core idea is to produce at least one of the layers of the sandwich structure lying inside the roll from a foamed metal, in particular foamed light metal.

For example, a structure may be such that the roller body of a roller according to the invention comprises an outer hollow cylinder, in which coaxially to this at least one stiffening element is arranged, which is at least partially formed of a foamed metal and with its outer surface, the inner surface of the hollow cylinder at least partially contacted. Thus, the outer hollow cylinder substantially serves to form a smooth closed surface, whereas the inner coaxially located in the outer hollow cylinder stiffening element provides the mechanical strength.

This results in a coaxial layer structure of at least two bodies arranged inside one another, for example of at least one inner body and one outer body, wherein the at least one inner body at least partially comprises a foamed metal and can therefore be manufactured very easily in relation to its volume and nevertheless has high stability and wherein the outer body is substantially a metal sleeve, which can be very thin compared to the prior art known in the art hollow cylinder assemblies, since it is supported from the inside by the stiffening element. For this reason, the wall thickness of the outer hollow cylinder can be kept thinner than the wall thickness of the stiffening element. For example, the metal sleeve can be made of a solid metal.

It may be provided according to the invention in one embodiment, the at least one inner stiffening element, for example, as a completely made of a metal foam cylinder, in particular to perform hollow cylinder. In the embodiment as a cylinder thus the outer preferably fully metallic hollow cylinder is completely filled with a metal foam, in the embodiment as a hollow cylinder only in one of the inner wall near range.

In another embodiment, it may also be provided that the stiffening element comprises a respective coaxial with each other and at least partially, preferably completely made of a metal foam hollow cylinder, each between two consisting of a metal foam hollow cylinders made of a solid metal hollow cylinder can be arranged, said the respective inner and outer surfaces of adjacent hollow cylinders contact each other at least in regions, so that a radial sandwich structure results from a plurality of coaxially arranged cylindrical metal foam elements with interposed full metal sleeves. The opposing inner and outer surfaces of these metal foam hollow cylinder can contact at least partially even without interposed solid metal hollow cylinder, especially if it is metal foam cylinder made of different metals.

In one embodiment, it may be provided that, regardless of the number of metal foam hollow cylinders, that is to say even in the case of a stiffening element comprising only one metal foam hollow cylinder, the radially innermost element is designed as a carrier element, which may be e.g. may be formed by a solid or a hollow cylinder preferably made of a solid metal. If a stiffening element made of only one metal foam hollow cylinder is provided, then such a support element contacts and supports this stiffening element directly and directly from the inside.

It may furthermore be provided according to the invention to carry out the at least one coaxial stiffening element, for example, as a cylinder or hollow cylinder made entirely of metal foam, which has, in addition to its foam pores, regularly or irregularly arranged cavities. Such an embodiment may also be given in a stiffening element with a plurality of coaxial metal foam hollow cylinders lying one inside the other.

In the formation of the at least one inner reinforcing element, it may further be provided to carry this out as a thick-walled hollow cylinder consisting of a foamed metal, in which case the thick-walledness can be seen relative to the outer hollow cylinder. Preferably, an inner stiffening element may have a wall thickness which is 2 to 10 times thicker than the wall thickness of the outer hollow cylinder.

In another embodiment, it may be provided that at least one coaxially arranged inside the outer hollow cylinder stiffening element as an axial stack or axial sequential arrangement of cylindrical or hollow cylindrical discs of a foamed metal, in particular wherein the discs are arranged axially spaced along the roll axis.

This can e.g. be realized by an axially spaced series of discs of metal foam, which are mounted at a distance on a cylindrical or hollow cylindrical support member, e.g. cohesively. The radially outer edge of these discs may be designed open-pore or wear a full metallic sleeve.

Alternatively, this series arrangement can be realized by a cylinder or hollow cylinder made of metal foam, in which a plurality of axially spaced circumferential grooves of a certain width are introduced, e.g. by turning, so that is defined by the groove widths, the distance and the width of the discs.

It can also be provided to form a stiffening element of two or more coaxially matingly arranged hollow cylinders with different diameters, which are preferably made of solid metal and the intermediate region is each foamed with a metal, so that a sandwich construction results with at least one core of foamed Metal and respective inner and outer, in particular thin-walled cylinder sleeves. Also, this stiffening element can be subsequently provided with circumferential grooves, for example by unscrewing, with an above construction results with successively spaced discs, the radially outer edge each carries a fully metallic sleeve.

Such a stiffening element can thus be used for all mentioned embodiments, in particular also to form spaced-apart disks of the aforementioned type. In this case, in one embodiment, all rings axially separated outer hollow cylinder or sleeves, core portions of metal foam and a common carrier cylinder or carrier cylinder.

According to the invention, it is preferably provided that the outer or inner diameter of the mutually coaxial or concentric lying elements, such as outer hollow cylinder, stiffening element and support elements each adapt to each other, in particular form-fitting, so that there is no or only a minimal gap when joining. Thus, the outer hollow cylinder is preferably designed as a particularly thin-walled hollow cylinder whose inner diameter substantially corresponds to the outer diameter of the outermost of the inner stiffening elements.

It can also be provided according to the invention, the outer hollow cylinder, in particular as at least substantially thin-walled hollow cylinder designed so that its wall is formed on at least one parallel to the roll axis region such that a recess for receiving additional elements, such as fastening devices for printing plates or Blankets, is formed, in particular whereby the inner circumferential surface of the hollow cylinder has an irregular shape and in particular has a deviating from a circular cross-sectional shape. In such a case it is According to the invention provided to adapt the outer shape of the stiffening element of the inner shape of the outermost hollow cylinder.

In terms of process technology, it can be provided according to the invention to push the inner and outer elements, in particular hollow cylinders and stiffening elements, into each other and to connect them to one another, in particular by material bonding, for example by welding or gluing them together.

In the method for producing the roller or the cylinder, an inner element for forming a sandwich structure can be coaxially introduced into the hollow cylinder

As a material for the inner at least partially foamed stiffening elements may preferably be a foamed light metal or a foamed metal alloy, in particular a foamed light metal alloy, for example of aluminum or magnesium or their alloys may be used.

It may further be provided according to the invention to carry out at least the outer hollow cylinder as an extruded profile, in particular wherein the extruded profile may already include at least one aforementioned recess and wherein the extruded profile may have, for example, additional stiffening elements, in particular stiffening ribs on its inner wall.

Another core idea of the invention is to flow through at least one hollow cylinder inner layer consisting of a foamed metal, in particular the layer of open-pore metal foam closest to the outer hollow cylinder of the roller, with a fluid for temperature control, in particular with a cooling liquid.

A resulting open-pore structure can then be flowed through by a Temperierungsfluid and / or be designed to flow through, so that a lateral surface of the roller is particularly even temperature controlled by a particularly fine distribution of possible flow channels.

The use of metal foam as a construction material offers a number of advantages. Thus, a foam structure of a foamed metal forms a rigid and dimensionally stable in themselves construction and comprises, for example, when using aluminum has an average density of only 0.4 g / cm ³ to 0.6g / cm ^3, thereby maintaining the shape stability and stiffness a significant weight reduction of the roller is effected. In addition, such metal foams may have an open-pored structure. It is thus intended to flow through at least one hollow cylinder of the sandwich structure of such an open-pore metal foam with a fluid for temperature control, in particular for the purpose of cooling with a cooling liquid to flow through. In this way, effective cooling, in particular of the roll surface of the roll, can be achieved.

Under a roll of a printing and / or converter and / or Lackiermaschine is in this application also a cylinder of a printing and / or converter and / or painting to understand. For the sake of simplicity, however, only the term of the roller is used without limiting the meaning thereto.

If, in the foregoing or in the following, there is talk of a fluid flowing through a layer or a cylinder or a hollow cylinder or the like, the fluid flows through the open-pore structure of the open-pore foamed metal and not just through a groove which is in such material is additionally incorporated. In contrast to a closed-cell foam, in which a groove is milled, whereby some closed pores are partially opened, which could then also be referred to as flow-through, are in the open-pore structure described here more than 40%, to further improve the temperature-controlling properties preferably more than 75% of the pores open and flows through and / or flowed through.

Furthermore, the open-pore structure has the following property: within a volume flowed through and / or permeable by temperature-control fluid, which lies inside the roller, there is a closed path, which in the mathematical sense is not simply connected, whose length is smaller than 0.5 cm. A closed, simply connected path is a closed path that can be contracted to a single point. In this case, a simply connected path would have to contract to one point, without even a part of the path ever leaving the volume through which flowed through and / or flowed through or through the metallic framework.

The use of the metal foam also has the advantage that metals and in particular light metals such as aluminum are known to have a high thermal conductivity, whereby a heat transfer, for example, from the lateral surface of such a roller can be made particularly effective in the cooling liquid. It is also possible, for example for the production of such a roller to produce the sheath body in a first step as a particularly thin-walled tube or as a particularly thin-walled tubular extruded profile, for example, the necessary recesses for gripper elements or holding devices in the lateral surface are already incorporated into the profile.

In a subsequent step, for example, corresponding shape-matched sandwich elements are then introduced into the interior of the sheath body and connected thereto, for example glued or welded or soldered thereto, resulting in a dimensionally stable and rigid construction.

In a later step, a tempering fluid is introduced into an open-pored structure of the metal foam, which later flows through the open-pore structure for purposes of tempering and also flows out of the roll and / or into the roll.

In a preferred embodiment, a plurality of coaxially fitted hollow cylinder layers of a stiffening element may be provided, which respectively comprise at least partially metal foam or are formed entirely of metal foam, wherein at least one of the coaxial layers is used to supply a Temperierungsfluid and optionally at least one other layer is used to remove the Temperierungsfluid again. Such fluid-flow or through-flowable metal foam layers can preferably be separated from one another by full-metal hollow cylinders and / or by a metal foam layer which can not flow through them.

In addition to the increased mechanical stiffness so the return flow and return channels are realized, especially for a coolant. In this case, it is considered to be particularly preferred if an air-filled metal foam layer or stiffening element is arranged between two layers or stiffening elements which serve as a return for the fluid, since the air cushion present in the metal foam intermediate layer additionally acts as a heat insulator can act, whereby a thermal short circuit between the flow and return of the fluid, in particular the cooling liquid can be effectively prevented.

Another core idea of the invention is to machine and / or finish the lateral surface of a roller constructed in this way in order to achieve a required concentricity in a subsequent step in a lathe and / or polishing machine and to balance the roller accordingly.

The following schematic drawings show different embodiments of the invention without any claim to completeness. Of course, it is also possible to combine the mentioned features of the different versions with each other.

Figur 1a

Schnittbild einer Walze gemäß des Standes der Technik

Figur 1b

Schematische perspektivischen Querschnitt einer Walze gemäß des Standes der Technik

Figur 2a

Schnittbild einer Ausführung einer Walze

Figur 2b

Schematische perspektivischen Querschnitt einer Ausführung einer Walze

Figur 3a

Schnittbild einer erfindungsgemäßen Ausführung einer Walze

Figur 3b

Schematische perspektivischen Querschnitt einer erfindungsgemäßen Ausführung einer Walze

Figur 4a

Schnittbild einer erfindungsgemäßen Ausführung einer Walze

Figur 4b

Schematische perspektivischen Querschnitt einer erfindungsgemäßen Ausführung einer Walze

Figur 5

Längsschnitt einer erfindungsgemäßen Ausführung einer Walze

Figur 6

Längsschnitt einer erfindungsgemäßen Ausführung einer Walze

Figur 7

Längsschnitt einer erfindungsgemäßen Ausführung einer Walze

Figur 8

Längsschnitt einer erfindungsgemäßen Ausführung einer Walze

Show it:

FIG. 1a

Sectional view of a roller according to the prior art

FIG. 1b

Schematic perspective cross section of a roller according to the prior art

FIG. 2a

Sectional view of an embodiment of a roller

FIG. 2b

Schematic perspective cross section of an embodiment of a roller

FIG. 3a

Sectional view of an embodiment of a roller according to the invention

FIG. 3b

Schematic perspective cross section of an embodiment of a roller according to the invention

FIG. 4a

Sectional view of an embodiment of a roller according to the invention

FIG. 4b

Schematic perspective cross section of an embodiment of a roller according to the invention

FIG. 5

Longitudinal section of an embodiment of a roller according to the invention

FIG. 6

Longitudinal section of an embodiment of a roller according to the invention

FIG. 7

Longitudinal section of an embodiment of a roller according to the invention

FIG. 8

Longitudinal section of an embodiment of a roller according to the invention

The FIGS. 1a and 1b show a cross section and a schematic perspective cross-section of a roller 1 of the known type. The roller. 1 In this case, for example, consists of a roller body 2 designed as a hollow cylinder, which has a cover surface 4 with a bearing journal 3 at its front-side ends. The roller body 3 is designed as a thick-walled hollow cylinder with a wall thickness in the range of about 30 mm to 60 mm, so that in the circumferential surface 6 of the roller body 3 additional elements not shown, such as fasteners, clamping elements or gripper elements can be incorporated without the stability of the entire roller 1 significantly affect.

The bearing journals 3 can furthermore each be made hollow, whereby the possibility is created, for example, to guide a cooling liquid into the interior 5 of the roll and to pass it through the roll 1, whereby the roll can be tempered.

An embodiment of a roller 10 show the FIGS. 2a, 2b , The roller 10 here comprises, for example, a particularly thin-walled hollow cylinder 11, whose lateral surface 12 can be further finished depending on the intended use of the roller, for example, be polished or carry auxiliary markings for clichés to be adhered can or something similar. Thin-walled here means at least thinner than in comparison to the hollow cylinder according to the prior art and in particular with a wall thickness in a range of 2 to 15 mm, preferably 3 mm to 10 mm.

Coaxially to the outer hollow cylinder 11, a stiffening element 20, which is also embodied, for example, essentially as a hollow cylinder, is furthermore introduced in the interior of the roller 10 such that its outer diameter corresponds exactly to the inner diameter of the outer hollow cylinder 11.

According to the invention in this possible embodiment, the stiffening element 20 made of a foamed metal, such as a light metal, such as aluminum or magnesium or an alloy of metals, in particular light metals. Due to its internal structure, the foamed metal structure has a high rigidity and dimensional stability and at the same time has an average density of only 0.5 g / cm ^3, for example when using aluminum as the material.

In this embodiment, only an inner coaxial stiffening element 20 is provided from a metal foam, which rests with its inner wall precisely on a support member 30 which is formed as a solid or preferably as a hollow cylinder and thereby creating a whole cylindrical sandwich structure which forms a metal foam Core.

It may be inventively provided to connect the respective aufeinender / adjacent interfaces of the respective cylinder or elements together, in particular cohesively, for example, to be soldered or welded or bonded, creating a solid and dimensionally stable construction.

It may be expedient to execute all the cylinders or elements in each case the same length and to arrange their front ends in each case in a common plane, whereby it is possible to provide the respective end faces of this sandwich construction with cover surfaces 14 with respective bearing journals 13 and with the respective cylinders or To connect elements 11, 20, 30, in particular in turn materially, for example, to glue or to weld or to solder.

The inventive construction of the roller 10, it is possible to significantly reduce the total weight of the roller without affecting the mechanical properties such as rigidity or dimensional stability, for example by the Wall thickness of the outer cylinder 11 is reduced and is in a range of, for example, 3mm to 10mm.

The stiffening element 20 made of foamed metal can easily be made thick-walled and have a thickness in the range of, for example, 30 mm to 100 mm or even fill the entire interior of the roller 10. In this case, the carrier element 30 is omitted.

Due to the low specific weight of the stiffening element 20 whose weight contributes only moderately to the total weight of the roller, whereby a weight reduction compared to a roll of the known type by a factor of 2 to 6 can be achieved.

An example of a subsequent calculation shows in this case the considerable weight saving which can be achieved depending on the design according to the invention. Roller of the known type Roll according to the invention Roller 1 Roller 2 outer diameter 200 mm 200 mm 200 mm Wall thickness outer sleeve 30 mm 6 mm 6 mm Wall thickness stiffening element 60 mm 60 mm Wall thickness carrier element 3 mm 3 mm Dense outer sleeve (material) 7.5 g / cm ³
(Stole) 2.5 g / cm ³
(Aluminum) 7.5 g / cm ³
(Stole) Dense reinforcing element (material) 0.5 g / cm
(Metal foam) ³ 0.5 g / cm ³
(Metal foam) Dense carrier element (material) 2.5 g / cm ³
(Aluminum) 2.5 g / cm ³
(Aluminum) Mass outer sleeve per meter 120.2 kg / m 9.1 kg / m 27.4 kg / m Mass stiffening element per meter 12.1 kg / m 12.1 kg / m Mass carrier element per meter 1.5 kg / m 1.5 kg / m Total mass per meter 120.2 kg / m 22.7 kg / m 41.0 kg / m weight proportion 100.0% 18.9% 34.1%

A second embodiment of the invention show the FIGS. 3a, 3b , The figures show a cross section or a schematic perspective cross section of a second roller 10 according to the invention.

The sandwich structure of the roller 10 comprises an outer hollow cylinder 11 and a support member 30 between which a stiffening member 20 is inserted and is substantially similar to the previous embodiment, with the difference that the stiffening member 20 is formed from at least two individual stiffening disks 21, which are spaced apart by a distance 22 in the axial direction. The stiffening disks 21 are in this case designed in each case as a hollow cylinder consisting of a foamed metal, wherein the respective inner and outer circumferential surfaces is adapted to the adjacent inner surface or outer surface of the outer cylinder 11 and the inner support member 30 and, for example, in each case connected thereto, in particular cohesively, for example, by welding, soldering, gluing or the like.

The axial length of the respective stiffening disks 21 and their respective axial spacing 22 relative to one another may be the same or different in each case, whereby the possibility is created of creating regions with different mechanical properties, such as rigidity or dimensional stability, along the axis of the roller 10.

It is also possible, with regard to the different in the end regions of the roller 10 due to the fixed lid surfaces 14 mechanical properties by a suitable number and shape of the stiffening disks 21 and a respective suitable distance 22 of the stiffening disks 21 to each other over the roller length substantially uniform To achieve rigidity and dimensional stability.

According to the invention it is further provided, as in the FIGS. 4a, 4b schematically shown as a cross section and as a schematic perspective cross section that the outer hollow cylinder 11 has at least one area for receiving fasteners for example, pressure plates and / or adjusting or gripper elements.

For this purpose, the hollow cylinder 11 in certain areas parallel to the cylinder axis inside, in particular radially into the interior of the hollow cylinder 11 facing thickenings 16, in which the desired fasteners or mounting holes, etc. 17 are introduced. According to the shape and design of the thickenings 16, the outer shape of the stiffening element 20 and the stiffening rings 21 is adapted, so that in turn a positive engagement between the lateral surface of the stiffening element 20 / the stiffening disks 21 and the inner surface of the cylinder 11 is given. The FIGS. 4a and 4b show here in the lateral surface of the stiffening element 20 in the axial direction extending groove 23 which is adapted in shape to the inner thickening 16 of the outer hollow cylinder.

In this case, it is also possible to shape or fold the lateral surface of the cylinder 11 in the areas mentioned by means of a device, whereby, for example, a shape for receiving fastening elements is formed.
By virtue of the fact that the foam structure of the foamed metal of the stiffening element 20 or the stiffening disks 21 is preferably open-pored, this is also preferably permeable to, for example, gases such as air or also to cooling liquids such as water.

It is therefore intended to flow through the roller 10 by means of a cooling liquid and thereby to temper.

The FIG. 5 1 shows a sandwich structure with an outer hollow cylinder 11, a stiffening element 20 and an inner support element 30, the support element 30 being covered by respective end pieces 43a, 43b and a closed body 31 forms, which includes a volume 15 and optionally includes a volume filled with fluid or metal foam and / or flows around and / or can flow around Temperierungsfluid.

The thus formed hollow body 31 is in this case held axially shorter to the respective ends of the roller 10 than the axial inner dimension of the outer hollow cylinder 11, whereby at the respective ends of the roller 10 between the cover surfaces 14 and the body 31 cavities 42a, 42b are formed. The cavities 42a, 42b are connected on the one hand to the respective bearing journal 13 connected to the cover surfaces 14 and hollow, and on the other hand to the stiffening element 20 formed of open-pored metal foam.

The length of the stiffening element 20 may be the same length as the body 31 or correspond to the axial inner dimension of the cylinder 11. This makes it possible, via a first bearing pin acting as an inlet 40 13 to guide a cooling liquid in the direction of the arrows 100 through the bearing pin 13, the corresponding cavity 42a through the metallic foam consisting of stiffening element 20 and the cavity 42b and the return 41 of the cooling liquid to lead over the opposite bearing pin 13.

With appropriate flow, both journals can each serve to supply and / or the discharge of Temperierungsfluid.

Characterized in that the wall of the cylinder 11 is relatively thin (compared to the prior art) is executed and the flow rate of the cooling liquid through the open-cell metal foam of the stiffening element 20 is only insignificantly impaired, is an effective and particularly responsive to changes in state temperature control of the outer circumferential surface of the hollow cylinder 11 is possible. In addition, the closed body 31 located inside the roller causes a considerable weight saving, since not the entire inner volume of the roller 10 has to be filled with cooling fluid.

FIG. 6 shows an embodiment of a roller 10 according to the invention, which substantially the in FIG. 5 described embodiment corresponds with the difference that the volume 15 is also filled with a metal foam, whereby a further increased dimensional stability and rigidity of the roller 10 can be achieved without significantly increasing their overall weight.

An embodiment of a roller 10 according to the invention FIG. 7 , which are essentially those in FIG. 5 described embodiment corresponds with the difference that the closed body 31 of the FIG. 5 in turn is built in a sandwich structure.

The according to FIG. 7 closed body 33 in this case comprises the carrier element 30, which is designed, for example, as a particularly thin-walled hollow cylinder, in the interior of which a stiffening element 24 made of a foamed metal is co-accurately inserted in register. The adjacent walls can be connected to each other in the same way, in particular cohesively, for example by welding, soldering or gluing or the like.

The stiffening element 24 may in this case be designed essentially as a hollow cylinder and its inner circumferential surface rest on a further carrier element 32 in register and be connected thereto. The closed body 33 thus formed with the respective end pieces 43a, 43b has a structure of this kind Furthermore, increased rigidity and dimensional stability, without significantly increasing the overall weight of the roller 10.

An embodiment of a roller 10 according to the invention FIG. 8 , The internal structure corresponds essentially to the embodiment according to FIG. 7 with the difference that the end pieces 43a, 43b have a respective opening 44a, 44b and one of the bearing journals, namely here the pin 13b is not hollow.

The opposite bearing pin 13a, however, has in its bore 13c coaxially disposed therein tube 13d with a smaller diameter than the bore 13c. The tube 13d is further tightly connected at its end located inside the roller to the opening 44a of the end piece 43a.

As a result, an inlet 40 with, for example, an annular cross-section and a return 41 with, for example, a circular cross-section, is formed in the journal 13a, via which the roller 10 can be charged with a coolant, or vice versa. In this case, the cooling liquid initially passes along the arrow directions 100 via the inlet 40 into the cavity 42a and then flows through the stiffening element 20 consisting of open-pored metal foam, as a result of which the outer jacket surface of the cylinder 11 is effectively tempered.

Subsequently, the cooling liquid passes into the cavity 42b and via the opening 44b located in the end piece 43b into the cavity 15 and from there via the opening 44a into the tube 13d, which thus forms the return 41. It may be expedient to carry out the carrier element 32 thick-walled or made of a different material to meet the requirements of the cooling liquid or the changed during operation of the roller with coolant pressure conditions. In this case, the openings 44a, 44b are introduced into the end pieces 43a, 43b such that the frontal regions of the stiffening element 24 are guided by the end pieces 43a, 443b are covered and sealed, whereby the air contained in the interior of the metal foam of the stiffening element 24 is enclosed and whereby the sandwich structure thus formed substantially acts as a heat insulator.

This has the effect that the coolant flowing back through the interior 15 has no influence on the inflowing cooling liquid.

With regard to all embodiments, it should be noted that the technical features mentioned in connection with an embodiment can not only be used or are used in the specific embodiment, but also in the respective other embodiments. All disclosed technical features of this invention description are to be classified as essential to the invention and arbitrarily combined or used alone. It is understood throughout the disclosure with the mention that a feature may be provided or a method step can be performed also an embodiment of the invention in which the feature in question is provided or a respective method step is performed.

Claims (15)

Roller or cylinder of a printing and / or converter and / or varnishing machine, which has at least one roller or cylinder body (10), wherein the roller or cylinder body (10) has at least one inner element (20) which at least Partly consists of a foamed metal, characterized in that a structure of the foamed metal is open-pored and flows through a Temperierungsfluid and / or can flow through. Roller or cylinder according to claim 1, characterized in that the at least one inner element (20) is designed as a hollow cylinder and / or as a cylinder. Roller or cylinder according to claim 1, characterized in that the roller or cylinder body (10) is constructed as a sandwich of at least two coaxially arranged in one another cylindrical elements (11, 20, 30), the respective inner and outer surfaces contact each other at least partially , Roller or cylinder according to claim 1, characterized in that the roller or cylinder body (10) has an outer fully metallic hollow cylinder (11), in which the at least one inner element (20) is arranged, which at least partially of a foamed, open-pored Metal is formed and contacted with its outer surface, the inner surface of the hollow cylinder (11) at least partially. Roller or cylinder according to claim 1, characterized in that the inner element (20) is designed as a stiffening element (20). Roller or cylinder according to claim 4, characterized in that the outer hollow cylinder (11) has a smaller wall thickness than the inner element (20) arranged therein and at least on its outer lateral surface (12) has a closed surface. Roller or cylinder according to claim 5, characterized in that a stiffening element (20) is formed of two or more coaxially arranged inside each other full metal hollow cylinders with different diameters, the intermediate region is foamed in each case with a metal. Roller or cylinder according to claim 1, characterized in that a radially inner element is designed as a carrier element (30) made of a solid metal full or hollow cylinder. Roller or cylinder according to claim 1, characterized in that two coaxial with each other arranged open-pore metal foam hollow cylinder, in the same or opposite direction flows through a Temperierungsfluid and / or can flow through. Roller or cylinder according to claim 9, characterized in that between two coaxial with each other arranged open-pore and traversed by a Temperierungsfluid and / or flow-through metal foam hollow cylinders, an air- and / or gas-filled metal foam hollow cylinder is arranged on both radial sides of one Full metal hollow cylinder is surrounded. Roller or cylinder according to claim 8, characterized in that on the roller or cylinder body axially on both sides bearing journals (13a, 13b) are arranged, of which one (13a) an inlet and outlet (13a, 13d) of Temperierungsfluid which are arranged coaxially around one another in the bearing journal (13a), wherein the feed (13c) or discharge (13d) is connected to the radially outermost hollow cylinder made of an open-pore metal foam and the discharge (13d) or supply (13c ) with a radially inner hollow cylinder of an open-pore metal foam or with the interior of the radially inner support element (30), wherein the Temperierungsfluid on the inlet and outlet bearing pin (13 a) opposite side of the roller or the cylinder in the radial Direction is led. Roller or cylinder according to claim 1, characterized in that the inner member (20) is formed as an axial stack or an axial series of cylindrical or hollow cylindrical discs (21) of a foamed metal, the discs (21) axially along the Roll or cylinder axis are arranged spaced. Roller or cylinder according to claim 12, characterized in that the series arrangement of the discs (21) is realized by a cylinder or hollow cylinder made of metal foam, in which a plurality of axially spaced circumferential grooves of a certain width are introduced. Roller or cylinder according to claim 1, characterized in that the superimposed boundary surfaces of the respective cylinder and / or hollow cylinder are connected to each other cohesively. Method for producing a roll or a cylinder for use in a printing machine or converter machine or varnishing machine, the cylinder body (10) being produced as a hollow cylinder (11) of a solid metal, in the interior of which at least one inner element (20, 30) form-fitting is introduced, which consists at least partially of an open-celled foamed metal, characterized in that a Temperierungsfluid is filled in an open-pore structure of the metal foam.

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