Clamping adapter for substrate rollers

Abstract

The invention relates to a clamping adapter for clamping a substrate roll comprising a sleeve, comprising a clamping body with a clamping body length Lk and a cylindrical or polygonal outer surface with an outer diameter Da and a cylindrical or conical inner surface with an inner diameter Di, as well as a first end face and a second end face. Furthermore, the invention relates to a method for clamping a substrate roll comprising a sleeve onto clamping cones of a roll changer or rewinder by means of a clamping adapter and also includes a method for manufacturing such a clamping adapter. The object of the invention is to provide a solution that enables a clamping adapter with low manufacturing costs and low wear due to the absence of mutually moving parts.The clamping adapter according to the invention is characterized in that the clamping body has at least two first slots extending from the cylindrical inner surface to the outer surface, with a first slot length Ls1, starting from the first end face, wherein the first slot length Ls1 is smaller than the clamping body length Lk.

Description

[0001] The invention relates to a clamping adapter for clamping a substrate roll having a sleeve, comprising a clamping body with a clamping body length Lk and a cylindrical or polygonal outer surface with an outer diameter Da and a cylindrical or conical inner surface with an inner diameter Di as well as with a first end face and a second end face.

[0002] Furthermore, the invention relates to a method for tensioning a substrate roll comprising a sleeve by means of a tensioning adapter on tensioning cones of a roll changer or rewinder and also comprises a method for producing such a tensioning adapter.

[0003] In substrate processing machines, unwinders or roll changers are used to unwind the substrate web from a substrate roll. In these unwinders, the web-shaped, printed or unprinted substrate is unwound from a substrate roll. Since the functionality of unwinders, unwinders, roll changers, etc. is essentially identical with regard to the present invention, the term "roll changer" is used exclusively for such components below.

[0004] Furthermore, machines that process web-shaped substrates can also utilize rewinders, which are also called reel-ups, in which the web-shaped substrate is rewound into a substrate roll. With regard to the present invention, such rewinders function identically to roll changers, which is why the present invention is also applicable to rewinders.

[0005] In both roll changers and rewinders, the core of the substrate roll is clamped between the two clamping cones. Using a roll changer as an example, the two clamping cones of the roll changer's support arms are retracted into the core of the substrate roll to be unwound. To clamp the substrate roll, the clamping cones of the roll changers usually have clamping wedges that are moved radially outwards to clamp the core of the substrate roll. The cores of such substrate rolls can generally be made of plastic or metal; in most cases, such cores are made of cardboard, so that the clamping wedges also dig into the core to a certain extent in a form-fitting manner, thus enabling a force-fitting and / or positive power transmission for driving and / or braking the substrate roll.

[0006] For substrate rolls used in the graphic arts industry and similar applications, the cores have standardized inner diameters to avoid customized solutions. Common inner diameters of the cores are 3 inches or 6 inches, which is why many roll changers or rewinders have clamping cones with an outer diameter of 3 inches.

[0007] Depending on various influencing factors such as roll width, roll diameter, wound substrate, etc., substrate rolls are delivered with different cores, so that a roll changer or rewinder must be able to process substrate rolls with an inner core diameter of both 3 inches and 6 inches.

[0008] Roll changers are known from the state of the art where the clamping cones can be replaced. However, since this requires replacing the entire clamping cone on the roll changer, such a conversion is very time-consuming.

[0009] Furthermore, sleeve adapters are known from the prior art which, when processing a substrate roll with a sleeve inner diameter of 6 inches, are plugged onto the clamping cones with an outer diameter of 3 inches after processing a substrate roll with a sleeve diameter of 3 inches before the new roll is inserted into the axle.

[0010] For example, DE 27 58 657 C2 teaches a mandrel for winding cores comprising an inner part, clamping jaws and rollers, wherein for clamping purposes one of the rollers rests on an inner cam surface of a clamping jaw and the other roller rests on an outer cam surface of the inner part.

[0011] DE 10 2007 024 768 B4 discloses a clamping cone for receiving different sleeves comprising an inner cone and an outer cone, wherein for clamping, inner clamping jaws can be displaced radially outwards and, when the outer cone is pushed on, the outer clamping jaws can be displaced radially outwards via the coupled inner clamping jaws.

[0012] However, such clamping adapters have the disadvantage that they are very complex and therefore costly to manufacture and are also subject to wear due to the adjustment of the components of the clamping adapters relative to each other.

[0013] The invention is therefore based on the object of creating a solution which enables a clamping adapter with low manufacturing costs and low wear due to the lack of parts that move relative to one another.

[0014] The object is achieved by a device according to claim 1 and a manufacturing method according to claim 13. The clamping adapter according to the invention is characterized in that the clamping body, starting from the first end face, has at least two first slots extending from the cylindrical inner surface to the outer surface with a first slot length Ls1, wherein the first slot length Ls1 is smaller than the clamping body length Lk.

[0015] Such a clamping adapter has the advantage that it is easy to manufacture, which enables low manufacturing costs and thus low acquisition costs.

[0016] Such a clamping adapter also has the advantage that it does not include any elements that move relative to one another and therefore no friction occurs between the individual components, which significantly reduces the susceptibility to wear and increases the service life.

[0017] According to one embodiment of the invention, the clamping body, starting from the second end face, has at least two second slots extending from the cylindrical inner surface to the outer surface, each having a second slot length Ls2. The second slots are radially offset from the at least two first slots, and the second slot length Ls2 is smaller than the clamping body length Lk. Such a configuration has the advantage of very uniform pressing of the clamping adapter on the sleeve and the clamping mandrel, while still avoiding components sliding against one another.

[0018] According to a further embodiment, the clamping body has at least one elevation on the outer surface in the region of the second end face, wherein the at least one elevation projects beyond the outer diameter Da of the clamping body. Such a configuration has the advantage that the clamping adapter can only be inserted into the sleeve of the roller to be mounted to a defined extent, thus preventing the clamping adapter from being inserted too far into the sleeve and thus potentially insufficient clamping of the clamping adapter on the mandrel.

[0019] According to a further embodiment, the outer surface of the clamping body has at least one recess. Such a configuration has the advantage of creating an additional positive connection between the outer surface of the clamping body and the inner surface of the sleeve, resulting in a high force and torque transmission from a clamping mandrel via a clamping adapter to the sleeve and thus to the substrate roll.

[0020] According to a further embodiment of the invention, a plurality of segments of the clamping body created by the first slots and / or the second slots are positively connected to one another or to each other by at least one securing element. This embodiment has the advantage that in the event of a breakage of an element of the clamping adapter due to improper handling, no fragments of the clamping adapter are lost and can cause problems.

[0021] Preferred developments of the invention will become apparent from the dependent claims and the following description. Various embodiments of the invention are explained in more detail, without being limited thereto, with reference to the drawings. Herein: Fig. 1A substrate roll held between two support arms of a roll changer Fig. 2aA three-dimensional representation of a clamping adapter according to the invention with a plurality of slots starting from one end face Fig. 2bA two-dimensional representation of a clamping adapter according to the invention with a plurality of slots starting from one end face Fig. 3A three-dimensional representation of a clamping adapter according to the invention with a plurality of slots starting from both end faces Fig. 4A two-dimensional representation of a clamping adapter according to the invention with a plurality of slots starting from both end faces and an elevation projecting beyond the outer diameter Fig. 5A two-dimensional representation of a clamping adapter according to the invention with a collar Fig. 6A two-dimensional representation of a clamping adapter according to the invention with a shoulder on the first end face Fig.7A representation of a clamping adapter according to the invention with a shoulder on the first end face and recesses on the outer surface Fig. 8A three-dimensional view of a clamping adapter with a securing element Fig. 9A sectional representation of a clamping adapter with a securing element.

[0022] Fig. 1 shows a section of a reel changer or rewinder. The reel changer or rewinder comprises two support arms 23, each of which has a clamping cone 22. These clamping cones 22 are essentially cylindrical and comprise Fig. 1 clamping wedges (not shown) which can be extended radially outwards in order to clamp the core 21 of the substrate roll 20 with the wound substrate 24, which is clamped between the two clamping cones 22, in a force-fitting and / or form-fitting manner. Since many cores 21 of substrate roll 20 have an inner diameter of three inches (76.2 mm), many roll changers or rewinders are equipped with clamping cones 22 which have an outer diameter of 3 inches. However, as shown in Fig. 1 shown, a substrate roll 20 with a sleeve 21 with an inner diameter greater than 3 inches, for example 6 inches, can be clamped, clamping adapters 1 are used, which are inserted between the clamping cones 22 and the sleeve 21 of the substrate roll 20 in order to compensate for the difference between the outer diameter of the clamping cones 22 and the inner diameter of the sleeve 21 of the substrate roll 20 and to ensure a positive and / or non-positive connection between the clamping cones 22 and the sleeve 21 by Fig. 1 The clamping wedges of the clamping cones 22 (not shown) can be extended for clamping.

[0023] Fig. 2a und Fig. 2b show an exemplary embodiment of a clamping adapter 1 according to the invention. Fig. 2a shows an exemplary design of the clamping adapter 1 in three-dimensional view for better clarity, whereas Fig. 2b the same exemplary execution of Fig. 2a in a two-dimensional view, where only the scaled representation concerning the clamping body length Lk and the outer diameter Da as well as the inner diameter Di of the clamping adapter 1 in the Fig. 2a und 2b differ from each other.

[0024] The clamping adapter 1 comprises a clamping body 2 with a clamping body length Lk and a cylindrical or polygonal outer surface 3 with an outer diameter Da.

[0025] The term "polygonal outer surface 3" encompasses all designs included under the generic term "polygon," namely all known designs of polygons and all known designs of rounded polygons, in which both the edges and / or the surfaces are rounded. Furthermore, the term "polygonal outer surface 3" also encompasses any shape of essentially cylindrical cross-sections with corresponding elevations and depressions preferably arranged uniformly around the circumference, such as gear-shaped cross-sections or cross-sections of cylinders with helical elevations applied to the outer surface.Such polygonal outer surfaces have the advantage over a purely cylindrical outer surface 3 of the clamping body 2 that they dig into the material of the sleeve 21 at least in a point-like or linear manner and thus ensure a secure hold and a secure transmission of the acceleration and deceleration moments of the substrate roll 20 in the case of braked and / or driven clamping cones 22.

[0026] Furthermore, the clamping body 2 of the clamping adapter 1 has a cylindrical bore arranged concentrically to the outer surface 3 or, depending on the design of the clamping cones 22, a conical bore with an inner surface 4 and an inner diameter Di. Consequently, the clamping body 2 comprises a first end face 5 and a second end face 6. In the Fig. 2a und 2b In the embodiment shown by way of example, the clamping adapter 1 further comprises two first slots 7 extending from the first end face 5, which each extend from the inner surface 4 of the clamping body 2 to the outer surface 3 of the clamping body 2 and have a first slot length Ls1 in the extension of the axis of rotation of the clamping adapter 1, wherein the first slot length Ls1 is smaller than the clamping body length Lk.

[0027] Although the Figuren 2a und 2b By way of example, we show an embodiment of the clamping adapter 1 with only two first slots 7, namely a first first slot 7-1 and a second first slot 7-2, it is of course also possible for the clamping adapter 1 to comprise more than only two first slots 7, the number of first slots 7 being dependent, for example, on the outer diameter Da of the clamping body 2, on the inner diameter Di of the clamping body 2 or on the material of the clamping body 2.

[0028] The first slots 7 run according to the Figuren 2a und 2b in the radial direction, but it is also possible that the first slots 7 run at an angle different from the radial direction.

[0029] The first slots 7 are preferably distributed evenly over the circumference of the outer surface 3 and / or the inner surface 4, since this results in a uniform pressing of the inner surface 4 of the clamping body 2 against the clamping cones 22 on the one hand and a uniform pressing of the outer surface 3 of the clamping body 2 against the sleeve 21 of the substrate roll 20 on the other hand when the clamping wedges of the clamping cone 22 are extended. However, it is also possible that, depending on the design of the clamping cone 22, the first slots 7 are distributed unevenly over the circumference of the outer surface 3 and / or the inner surface 4.

[0030] Although in the Figuren 2a und 2b the first slots 7 are shown with a right-angled end at their end deviating from the first end face 5, it is also possible to round these ends facing away from the first end face 5 by means of radii or to design the end in the form of a cylindrical bore, which can also have a diameter greater than the width of the slot, in order to ensure a more even stress distribution when clamping the sleeve 21 by expanding the clamping body 2 by extending the clamping wedges of the clamping cone 22.

[0031] Fig. 3 shows a design of a clamping adapter 1, which has the same features as under the Fig. 2a und Fig. 2b described, and in addition to the first slots 7, a plurality of second slots 8.

[0032] This plurality of second slots 8, of which in Fig. 3 However, due to the simplified representation for better clarity, only a first second slot 8-1 is visible, start from the second end face 6 and have a second slot length Ls2, wherein the second slot length Ls2 is smaller than the clamping body length Lk.

[0033] Analogous to the first slots 7, the second slots 8 extend from the inner surface 4 of the clamping body 2 to the outer surface 3 of the clamping body 2. In order to avoid severing the clamping body 2, the second slots 8 are offset in the radial direction from the first slots 7.

[0034] Although Fig. 3 By way of example, we show an embodiment of the clamping adapter 1 with only two second slots 8, it is of course also possible for the clamping adapter 1 to comprise more than only two second slots 8, wherein the number of second slots 8 is dependent, for example, on the outer diameter Da of the clamping body 2, on the inner diameter Di of the clamping body 2 or on the material of the clamping body 2.

[0035] The second slots 8 run according to Fig. 3 in the radial direction, but it is also possible for the second slots 8 to run at an angle different from the radial direction. The second slots 8 are preferably distributed evenly over the circumference of the outer surface 3 and / or the inner surface 4, since this results in a uniform pressing of the inner surface 4 of the clamping body 2 against the clamping cones 22 on the one hand and a uniform pressing of the outer surface 3 of the clamping body 2 against the sleeve 21 of the substrate roll 20 on the other hand when the clamping wedges of the clamping cone 22 are extended.

[0036] However, it is also possible that, depending on the design of the clamping cone 22, the second slots 8 are distributed unevenly over the circumference of the outer surface 3 and / or the inner surface 4.

[0037] Although in Fig. 3 the second slots 8 are shown with a right-angled end at their end deviating from the second end face 6, it is also possible to round these ends facing away from the second end face 6 by means of radii or to design the end in the form of a cylindrical bore, which can also have a diameter greater than the width of the slot, in order to ensure a more even stress distribution when clamping the sleeve 21 by expanding the clamping body 2 by extending the clamping wedges of the clamping cone 22.

[0038] The width of the first slots 7 and / or the second slots 8 depends on influencing factors such as the ratio of the first slot length Ls1 to the clamping body length Lk and / or the ratio of the second slot length Ls2 to the clamping body length Lk, the material of the clamping adapter 1, and the manufacturing process of the clamping adapter 1. The width of the first slots 7 and / or the second slots 8 is typically approximately 1 mm to a maximum of 10 mm, preferably 2 mm to 6 mm.

[0039] Fig. 4 shows an exemplary, purely schematic representation of a clamping adapter 1 in a two-dimensional view, wherein, to avoid a confusing representation, only the hidden edges of the inner surface 4 have been shown graphically, other hidden edges, which arise, for example, through the second slots 8, are not shown.

[0040] The Fig. 4 The illustrated embodiment of a clamping adapter 1 shows an exemplary embodiment of a clamping adapter 1 with a plurality of first slots 7, which extend from the first end face 5, and a plurality of second slots 8, which extend from the second end face 6, wherein the first slots 7 are radially offset from the second slots 8.

[0041] The Fig. 4 The embodiment shown has at least one elevation 9 on the outer surface 3 in the region of the second end face 6, which elevation projects beyond the outer diameter Da of the clamping body 2. At least one such elevation 9 limits the insertion of the clamping adapter 1 into the sleeve 21 of the substrate roll 20, so that the length to which the inner surface 4 of the clamping adapter 1 rests on the outer surface 3 of a clamping cone 22 of a roll changer or rewinder is defined. Furthermore, such an elevation 9 serving as a stop enables the removal of the clamping adapter 1 from the sleeve 21, since excessive insertion of the clamping adapter 1 into the sleeve 21 is avoided. In the case of a plurality of elevations 9, these are preferably arranged evenly on the circumference of the outer surface 3 of the clamping body 2.

[0042] The at least one elevation 9 is preferably arranged between the second slots 8. However, if at least one elevation 9 is arranged in the radial extension in the region of a second slot 8, the corresponding first slot 7 is preferably designed such that it also cuts through the elevation 9 in order to enable expansion of the clamping adapter 1 by the extending clamping wedges of the clamping cone 22 in the clamped state of the substrate roll 20.

[0043] Fig. 5 shows a design of the clamping adapter 1 and is based on Fig. 4 , which is why the same general comments on the graphic execution of the Fig. 4 also for the Fig. 5 apply.

[0044] Fig. 5 shows a design of the Fig. 4 illustrated embodiment, wherein the elevation 9 is formed as a cylindrical collar. This cylindrical collar preferably extends over the entire circumference of the outer surface 3.

[0045] However, it is also possible for this collar to be arranged only in at least one area on the outer surface 3 or at several locations on the outer surface 3. However, if at least the elevation 9 designed as a cylindrical collar is arranged in radial extension in the area of ​​a second slot 8, the corresponding first slot 7 is preferably designed such that it also cuts through the collar in order to enable the clamping adapter 1 to be expanded by the extending clamping wedges of the clamping cone 22 when the substrate roll 20 is tensioned.

[0046] Although not in the Figuren 2a, 2b , 3 , 4 oder 5 As shown in the drawing, it is also possible to design the outer surface 3 of the clamping body 2 in such a way that the outer surface 3 of the clamping body 2 has at least one recess 10 or a plurality of recesses 10. Such an example with recesses 10 designed as axial notches is shown in Fig. 7 and in Fig. 8 shown.

[0047] This at least one recess 10 or the plurality of recesses 10 can be designed as axial notches and / or as axial grooves and / or as spiral grooves and / or as a cross-shaped grid and / or as conical or pyramid-shaped recesses 10. Due to the structured outer surface 3 of the clamping body 2 achieved in this way, a better grip and thus a higher coefficient of friction can be achieved between the outer surface 3 of the clamping body 2 and the inner surface 4 of the sleeve 21 to be clamped.

[0048] As under the Figuren 2 and 3As described, the first slot length Ls1 is smaller than the clamping body length Lk, furthermore the second slot length Ls2 is smaller than the clamping body length Lk.

[0049] The ratio of the first slot length Ls1 to the clamping body length Lk as well as the ratio of the second slot length Ls2 to the clamping body length Lk depends, among other things, on the inner diameter Di, the outer diameter Da as well as the material of the clamping body 2 in order to achieve sufficient elasticity and extensibility of the clamping body 2. Typically, however, the first slots 7 are designed such that the first slot length Ls1 is a maximum of 0.95 times the clamping body length Lk, and / or that the second slot length Ls2 is a maximum of 0.95 times the clamping body length Lk. Although in the Figuren 2a bis 9 not shown, it is also possible to design the first slot length Ls1 differently from the second slot length Ls2.

[0050] Furthermore, it is possible, although in the Fig. 2a bis 9 Not shown is that the first slots 7 have different first slot lengths Ls1. This means that a first slot 7-1 has a first slot length Ls1-1, which differs from the second slot length Ls1-2 of a second slot 7-2.

[0051] Furthermore, it is possible, although in the Fig. 2a bis 9 Not shown is that the second slots 8 have mutually different second slot lengths Ls2. This means that a first second slot 8-1 has a first second slot length Ls2-1, which differs from the second second slot length Ls2-2 of a second second slot 8-2.

[0052] With a number of first slots 7 and / or second slots 8 greater than two, this list could be continued indefinitely, whereby it is also possible for at least one first slot 7 to have a first slot length Ls1-1 and at least one first slot to have a second slot length Ls1-2. Furthermore, it is also possible for at least one second slot 8 to have a first slot length Ls2-1 and at least one second slot 8 to have a second slot length Ls2-2.

[0053] Fig. 6 shows a two-dimensional schematic representation of a design of a clamping adapter 1, which is exemplified on Fig. 4 which is why the same comments on the graphic execution as in Fig. 4 apply.

[0054] Fig. 6 shows an embodiment of a clamping adapter 1, wherein the clamping body 2 has a shoulder diameter Dr extending from the first end face 5 to the second end face 6 over a shoulder length La, wherein the shoulder diameter Dr is smaller than the outer diameter Da. Such a shoulder has the advantage that, on the one hand, the largest possible inner surface 4 of the clamping body 2 is in contact with the outer surface 3 of a clamping cone 22, but that, due to the shortened outer surface 3 of the clamping body 2, a higher pressure is created between the outer surface 3 of the clamping body and the inner surface 4 of the sleeve 21.

[0055] The clamping adapter 1 according to the invention and / or the clamping body 2 can be made of an elastic material such as a thermoplastic or a thermosetting plastic and / or of metal and / or of a composite material.

[0056] Fig. 7 shows a side view of an embodiment of a clamping adapter 1. This embodiment shows an exemplary clamping adapter 1, which has recesses 10 on the outer surface 3 of the clamping body 2 in the axial direction. Furthermore, the exemplary clamping adapter 1 has a shoulder with a shoulder diameter Dr on the first end face 5.

[0057] In addition, the Fig. 7 The embodiment shown has the special feature that the edge of the outer surface 3 facing the first end face 5 has a chamfer 13. This embodiment has the advantage that the clamping adapter 1 can be inserted more easily into the sleeve 21 of the substrate roll 20 due to the beveled chamfer 13. The chamfer 13 preferably has an angle between 15° and 45° to the outer surface 3 of the clamping body 2, but can also deviate from this. If the clamping adapter 1 has a chamfer 13 in the area of ​​the first end face 5, unlike in Fig. 7 shown does not have a step with a step diameter Dr, the chamfer 13 can also be attached directly to the edge of the outer surface 3 to the first end face 5.

[0058] Fig. 8 shows a three-dimensional view of a clamping adapter 1, which comprises, for example, an outer surface 3 with recesses 10 and a plurality of first slots 7 and a plurality of second slots 8.

[0059] So-called segments 11 are created between the respective first slots 7 or between a first slot 7 and a second slot 8. These segments 11 are connected to one another to form the clamping body 2. In the event of improper handling of the clamping adapter 1, for example if the clamping adapter 1 is placed at an angle when being pushed into the sleeve 21 and at the same time an unacceptably high amount of force is applied when attempting to drive it into the sleeve 21 or if a clamping adapter 1 is improperly removed from a sleeve 21, the clamping adapter 1 can break, so that at least one segment 11 can fall into the sleeve 21 of a substrate roll 20 or into roll supply components of the roll changer or rewinder and cause malfunctions there.

[0060] In order to prevent the clamping adapter 1 from disintegrating into individual segments 11, the clamping adapter 1 comprises, in one embodiment, at least one securing element 12 which positively connects the segments 11 of the clamping body 2 created by the first slots 7 and / or the second slots 8 to one another.

[0061] This at least one securing element 12 can be designed, for example, as a cable or ring running radially inside the clamping body 2. Since this securing element 12 designed as a cable in Fig. 8 is only very limitedly recognizable, shows Fig. 9 a sectional view according to Fig. 8 shown section plane A - A.

[0062] Since the section A - A according to Fig. 8 through two second slots 8, only the upper part is in Fig. 9 shown as a cross-sectional area hatched. In the cross-sectional view according to Fig. 9 The securing element 12, designed as a radially extending cable or ring, can be seen both in section and in plan view. This securing element 12, designed as a cable or ring, runs in an annular channel running into the clamping body 2 between the inner diameter Di and the outer diameter Da, the cross-section of which is larger than the annular securing element 12 so that the clamping body 2 can expand further when the sleeve 21 is tightened. Alternatively, the securing element 12 can also be designed as a ring, for example made of a steel cable or elastic cord, which is inserted into a radially extending groove machined out from the outer surface 3.In order to prevent broken segments 11 from threading out of such an annular securing element 12 inserted from the outside, such a radially extending groove can be closed with at least partial covers, for example by partially attaching plates over the groove.

[0063] Such a contour with an annular channel, as well as such an annular securing element 12 incorporated into the clamping body 2, can be produced, for example, by manufacturing the clamping adapter 1 using an additive manufacturing process such as a 3D printing process. The layered construction of the product makes it possible to form such enclosed cavities, such as an annular channel, as well as self-contained securing elements 12 embedded in the clamping body 2.

[0064] If the tolerances or surface finishes achievable with an additive manufacturing process are not sufficient, it is also possible to machine the clamping adapter 1 at least partially using the additive manufacturing process.

[0065] Although in the Fig. 8 und Fig. 9 While only a design with only a single continuous securing element 12 is shown by way of example, it is also possible to attach a plurality of securing elements 12 between the individual segments 11. This can be achieved, for example, by incorporating T-shaped cavities on both sides of the first slots 7 and / or the second slots 8 and by impressing corresponding double-T-shaped or bone-shaped securing elements 12 using an additive manufacturing process.However, it is also possible to attach securing elements 12 designed as connecting elements bridging the first slots 7 and / or the second slots in a form-fitting or material-fitting manner in grooves of the outer surface 3 on both sides of the first slots 7 and / or the second slots 8, wherein the securing elements 12 designed as connecting elements are either sufficiently extensible or correspondingly movable via elongated holes in order to enable the clamping adapter 1 to be spread open.

[0066] Although not in the Figuren 2a bis 9As shown, it is also possible to provide the clamping adapter 1 with a pull-out aid so that the clamping adapter 1 can be removed from a sleeve 21 without damage even if the clamping adapter 1 has dug into the sleeve 21, which is possible, for example, with very soft sleeve materials or in the event of an emergency stop with a high roll weight. A pull-out aid can be implemented, for example, as one or more threaded holes on the second end face 6, so that a clamping adapter 1 stuck in a sleeve 21 can be removed by means of pull rods.

[0067] In order to clamp a substrate roll 20 comprising a core 21 by means of a clamping adapter 1 onto the clamping cones 22 of a roll changer or a rewinder, in a first step a clamping adapter 1 is inserted into the bore of the core 21 on each side of the substrate roll 20, so that in a subsequent second step the clamping cones 22 of the roll changer or rewinder are retracted into the clamping adapter 1. This procedure prevents a clamping element 1 from already sitting on a clamping cone 22 without a core 21 mounted on it, since this can cause problems when the clamping wedges are not fully retracted into the clamping cone 22 when the clamping adapter 1 sitting on the clamping cones 22 is inserted into the core 21. List of reference symbols

[0068] 1Clamping adapter 2Clamping body 3Outer surface 4Inner surface 5First end face 6Second end face 7First slot 8Second slot 9Protrusion 10Recess 11Segment 12Securing element 13Bevel 20Substrate roll 21Sleeve 22Clamping cone 23Support arm 24Substrate LkClamping body length Ls1First slot length Ls2Second slot length LaStep length DaOuter diameter DiInner diameter DrStep diameter

Claims

1. Clamping adapter (1) for clamping a substrate roll (20) having a sleeve (21), comprising a clamping body (2) with a clamping body length Lk and a cylindrical or polygonal outer surface (3) with an outer diameter Da and a cylindrical or conical inner surface (4) with an inner diameter Di as well as with a first end face (5) and a second end face (6), characterized in that the clamping body (2), starting from the first end face (5), has at least two first slots (7) extending from the inner surface (4) to the outer surface (3) with a first slot length Ls1, wherein the first slot length Ls1 is smaller than the clamping body length Lk.

2. Clamping adapter (1) according to claim 1, characterized in thatthe clamping body (2) has, starting from the second end face (6), at least two second slots (8) extending from the inner surface (4) to the outer surface (3) with a second slot length Ls2, wherein the second slots (8) are radially offset from the at least two first slots (7), and wherein the second slot length Ls2 is smaller than the clamping body length Lk.

3. Clamping adapter (1) according to one of claims 1 or 2, characterized in that the clamping body (2) has at least one elevation (9) on the outer surface (3) in the region of the second end face (6), wherein the at least one elevation (9) projects beyond the outer diameter Da of the clamping body (2).

4. Clamping adapter (1) according to claim 3, characterized in that the elevation (9) is designed as a cylindrical collar.

5. Clamping adapter (1) according to one of claims 1 to 4, characterized in that the outer surface (3) of the clamping body (2) has at least one recess (10).

6. Clamping adapter (1) according to claim 5, characterized in that the at least one recess (10) is designed as an axial notch and / or as an axial groove and / or as a spiral groove and / or as a cross-shaped grid and / or as conical or pyramid-shaped recesses.

7. Clamping adapter (1) according to one of claims 1 to 6, characterized in that the first slot length Ls1 is a maximum of 0.95 times the clamping body length Lk.

8. Clamping adapter (1) according to one of claims 1 to 7, characterized in that the second slot length Ls2 is a maximum of 0.95 times the clamping body length Lk.

9. Clamping adapter (1) according to one of claims 1 to 8, characterized in that the clamping body (2) has a shoulder diameter Dr extending from the first end face (5) to the second end face (6) over a shoulder length La, the shoulder diameter Dr being smaller than the outer diameter Da.

10. Clamping adapter (1) according to one of claims 1 to 9, characterized in thatthe clamping body (2) consists of an elastic material such as a thermoplastic or a thermosetting plastic and / or of metal and / or of a composite material.

11. Clamping adapter (1) according to one of claims 1 to 10, characterized in that the edge of the outer surface (3) facing the first end face (5) or the edge of the outer surface (3) with the first end face (5) has a chamfer (13).

12. Clamping adapter (1) according to one of claims 1 to 11, characterized in that a plurality of segments (11) of the clamping body (2) created by the first slots (7) and / or by the second slots (8) are positively connected to one another by at least one securing element (12).

13. Clamping adapter (1) according to one of claims 1 to 12, characterized in that the clamping adapter (1) has a pull-out aid.

14. Method for producing a clamping adapter (1) according to one of claims 1 to 13, characterized in thatthe clamping adapter (1) is manufactured using an additive manufacturing process.

15. Method according to claim 14, characterized in that the clamping adapter (1) is at least partially machined using the additive manufacturing process.

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