DE102014117521B4 - Sleeve-shaped winding core - Google Patents

Abstract

Sleeve-shaped winding core (1; 10; 20; 30) for strip-shaped strip material having a circumferential outer surface (3) which is circular in cross-section as a support for the strip-shaped strip material and having a circular inner surface (4) of circular cross-section, with which the winding core (1; 20; 30) can be guided over a core carrier (31), characterized in that on the inner surface (4) inwardly projecting, transversely to a circumferential direction of the inner surface effective driving structures (5; 15; 25; 35) are formed.

Description

The present invention relates to a sleeve-shaped winding core for strip-shaped strip material with the features of the preamble of claim 1. It further relates to a winding device for winding, in particular for winding, of strip-shaped strip material. Finally, it relates to a method for winding, in particular winding, of strip-shaped strip material, which method is carried out in particular following a separation of a material web by at least one longitudinal cut in at least two parallel webs strip-shaped web material.

It is in production technology, as well as in end use for a long time common practice to resort to the role donated, web or strip-shaped material. Mention may be made here, for example, of film rolls for packaging films which can be used both in the home, e.g. as cling films, use as well as in the field of production or processing of goods, roll-wound adhesive tapes, roll-on-delivered dressing material, and the like. more. Accordingly, very diverse and almost innumerable products are produced, transported and delivered as "endless goods" in rolled-up form and then used for further production processes of the roll.

In the context of the production and also the further handling of such wound on wound webs it applies accordingly with automatically operated winding machines the web up or unwind on or from rolls of material. Corresponding rolls of material are always formed around a winding core, on which a first length section of a wound material web is laid, before this material web is wound up by corresponding winding to the roll. As typically sleeve-shaped hubs nowadays cardboard cores or cardboard cores are used predominantly. These offer the advantage that, on the one hand, they are sufficiently rigid in order to meet the rigidity requirements of the winding core, that they can furthermore be produced simply and at low cost, and that they are finally used in machining, e.g. the cutting of the appropriate sleeve sections for the hubs can be easily processed depending on the width of wound up or wound on it to be stored strip material.

Here, in the corresponding industry or technology that deals with roll-shaped or to be used tape or web material, specific, based on imperial standards with respect to the inner diameter of the hubs established. In particular, such winding cores with diameters of 1 inch (1 "), 2 inches (2"), 3 inches (3 ") or 6 inches (6") are customary. Depending on the industry, however, such cores with inner diameters of 8 inches (8 "), 10 inches (10") or 12 inches (12 ") are used. Alternatively, the inner sheath diameters are also given in metric dimensions, e.g. for a 3 "sleeve also 76 mm inner diameter.

This standardization of the inner diameter of the hubs is particularly important because the corresponding machine equipment of the various machines, with which the hubs are handled for winding or unwinding of the strip material, must be equipped standardized for gripping and clamping the cores.

A particular problem in winding strip-shaped strip material results in a work step of cutting a fed web material of greater width into two or more strip-shaped endless belts, in order to produce e.g. To produce a plurality of webs of an endless adhesive strip from a fed, provided with an adhesive film of greater initial width. For production reasons, corresponding wide webs of material frequently have variations in the web thickness or material thickness running transversely to their running direction. Thus, e.g. in the case of metal foils when rolling on the rolling mill - so-called pots or bowls arise in the film surface, in which the material protrudes below or above the web plane. This results in the cutting of appropriate material webs in the longitudinal direction to narrow strip-shaped bands length variations, which can add up to larger length difference in the often up to several thousand meters long web or belt sections. Accordingly, it is not possible without further measures to wind or wind the stripe-shaped strips cut from a material web onto correspondingly provided individual winding cores, which are rotationally driven at mutually equal angular speeds. Because in this way, only the shortest strip would be tightly wound, more strips with due to the circumstances described above greater length extension would "sag" and accordingly not taut and clean wound. The length and thickness differences in the cut strips also result in different diameters of the rolls during winding, which in turn results in differences in the winding rate, i. the wound length per roller revolution, conditional.

This circumstance has been known for a long time, and appropriate measures have been taken to counteract this and yet several strips of material produced by longitudinal cutting on a common winding axis or winding shaft to be able to wind up arranged winding cores. So as to be able to achieve this, so-called friction winding systems have been developed in which the winding cores are mounted on the winding axis via slip coupling devices. For this purpose, core carrier or core holder are then provided, which acts on the usual winding cores used from the inner circumferential surface, this rotationally and axially immovable and sitting on the winding axis with a slip clutch mechanism with adjustable torque transmission sit. For the winding operation, in particular the winding, the winding axis is then driven at such a rotational speed and such a torque that the core carriers are slipped over the slip clutches and thereby wind up the run-up strip material with predetermined belt tension or specifiable tensile force. Here, the individual core carrier can individually, in particular depending on the wound number of layers, different slip experience, so that they rotate with different, adapted to the individual, just accumulating tape length rotational speed and thus a plurality of winding cores can be driven via a common winding axis and This can thereby reliably and accurately wind up the cut web material, so the individual strip-shaped bands. In order to realize the sliding effect of the core beams, they are acted upon either axially or radially with a friction force. Usually, discs made of plastic or oil-impregnated felt are arranged between the metallic core carriers. The friction force changes with the diameter. With a small diameter, a higher relative friction force is often given than with larger diameters. The drop in tensile force with increasing diameter is called the winding characteristic curve.

These core carriers, which are typically formed in a hollow cylinder, are complex in their construction and therefore complicated in their manufacture. They have an inner cylindrical surface, which is designed to rest on the winding axis and by appropriate means, such as. form expandable compressed air hoses against these surfaces frictional Reibmitnehmern the winding axis the slip clutch. On the outer circumferential surface are then radially outwardly adjustable locking means, e.g. Riegeldorne, bar balls, bar doors or the like., Provided with the press the core carrier from the inside against the inner circumferential surface of the winding core and so can produce a frictional or frictional connection to transmit a torque safely to the winding core.

Corresponding winding carriers and winding axes or winding shafts have long been known from the prior art, for example described in the DE 11 98 163 A , of the DE 12 37 398 A , of the US Pat. No. 3,817,468 or the JP H02 132 043 A ,

This type of design of the core carrier has proven itself in functionality over many decades, but still carries various disadvantages that have always been accepted.

On the one hand, these winding cores are mechanically complex formed elements, since the mechanical possibility for locking or unlocking the wound on the core carrier winding core is to provide, for this purpose, the core carrier relative to each other in the circumferential direction movable ring elements having, e.g. via slanted running surfaces or the like. Set pressure elements or locking elements radially outwards or inwards, e.g. Move the locking ball outward or allow it to move inwards in order to attack it on the inside of a winding core, in particular a cardboard sleeve, and to grasp it in a force-fitting manner or to disengage therefrom. This highly complex mechanism makes corresponding core carriers costly to manufacture, not infrequently the price of such a core carrier in the range of US $ 150.00 can be seen, which for the equipment of a provided with a variety of such core carrier winding axle very quickly costs in Range of US $ 10,000.00 and more. On the other hand, the corresponding latch mechanism is susceptible to soiling, e.g. caused by dusty abrasion in production, so that after a certain period of use has undergone a costly maintenance and revision of these elements, which requires a considerable effort up to a complete disassembly of these parts and cleaning of the items and the subsequent assembly. Finally, due to the mechanics to be accommodated, these elements require a minimum height which can hardly be undershot (extent in the radial direction), which leads in particular to elements for hubs of small internal diameter (1 inch, 3 inches) to the diameter of the winding axis and thus its rigidity (Bending stiffness, torsional rigidity) is limited.

While in the past the problems of high cost of equipping the winding axles with corresponding core carriers as well as the periodically required maintenance or revisions of these mechanical elements has been overcome, in particular the limitation of the design of the diameter of the winding axle leads to a serious problem. For there is already a long time in the industry the trend towards the production of rolled up web material with a larger web width, so that longer and often more numerically more hubs are to handle or in cutting machines for cutting Strip-shaped strip material longer winding axles are required, on which a larger number of winding cores are to be arranged accordingly. Since most of the hubs are arranged close to tight on the winding axes, there is no possibility of an intermediate support, so that the winding axes must be made sufficiently rigid and stiff to suffer here no deflection in an intolerable extent. But just for hubs with small inner diameters (1 inch, 3 inches), this requirement represents a major problem. Because when using the mechanically locking core carrier as described above, the diameter of the winding axis is limited due to the required space for the locking mechanism of the core carrier. Here the mechanical engineers come up against seemingly insurmountable limits.

One way to form a core carrier, which does not require mechanical locking and is referred to as self-tightening, is in the DE 10 2008 045 109 A1 described. There, a core carrier is shown, which is formed as a solid, one-piece component by deliberately introduced in the radial direction into the material, running along the entire longitudinal extension slots are introduced as material weakening to obtain a circumferentially effective flexibility. This core carrier is placed on the winding axis, which press via air pressure in the pressing force controllable pressure elements from the inside to the core carrier, so cause the slip clutch and at the same time give a circumferential extent of the core carrier, with this presses against the inner surface of the winding core and this for transmitting torque jammed.

Although this is the problem of a required for the known mechanically locking core carrier minimum height bypassed. However, here is the pressure exerted by the pressure device in the winding axis, the pressure fluid hoses shown there, both for the formation of the slip clutch or for the strength thereof (hence the amount of transferable torque with this clutch) as well as for the frictional pressure on the winding core. Here, however, the problem arises that it can not be clearly defined at which point slipping occurs relative to the winding axis. However, for the winding process as such is important that not the winding core relative to the core carrier is carried with slip, but only the core carrier relative to the winding axis. Therefore, also in the DE 10 2008 045 109 A1 shown solution as not optimal, but still in need of improvement.

This problem is addressed by the present invention.

Accordingly, to overcome one or more of the above-described disadvantages in a first aspect of the invention, first a sleeve-shaped winding core for strip-shaped strip material having a circular in cross-section circumferential outer surface as a support for the strip-shaped strip material and with a circular in cross section circumferential inner surface, with the winding core can be performed via a core carrier specified, which is characterized in that on the inner surface inwardly projecting, transversely to a circumferential direction of the inner surface effective driving structures are formed. Advantageous developments to this aspect are indicated in the dependent claims 2 to 12. In a further aspect, the invention provides a novel winding device for winding, in particular for winding, strip-shaped strip material. This includes a rotatably driven winding axis, further includes at least one arranged on the winding axis, coupled with adjustable coupling force to the winding axis, at least one driver having core carrier and finally has a arranged on the core carrier winding core of the above outlined expression, the winding core in such Way is arranged on the core carrier that the driver is engaged with the driving structures to transmit a torque on the core carrier bearing torque on the winding core. Advantageous developments of this aspect of the invention are specified in the claims 14 to 16 in more detail.

• i) Aufbringen von wenigstens zwei hohlzylinderförmigen, auf einer äußeren Mantelfläche jeweils mindestens einen Mitnehmer aufweisenden Kernträgern auf eine mit hinsichtlich einer radialen Richtung und/oder axial wirkenden Druckkraft einstellbaren Kupplungsmitteln versehene Wickelachse in axialer Richtung der Wickelachse hintereinander. Erfindungsgemäß erfolgt dieses Aufbringen in einer Weise, dass die Kernträger jeweils mit einer inneren Mantelfläche auf der Wickelachse aufliegen und über die Kupplungsmittel mit einem vorgebbaren Übertragungs-Drehmoment mit der Wickelachse gekoppelt sind. (Alternativ zu einer radial wirkenden Druckkraft kann die geregelte oder gesteuerte Kraft, hinsichtlich derer die Kupplungsmittel einstellbar sind, auch axial aufgebracht werden. Dann werden zwischen den – in der Regel metallischen – Kernträgern Kunststoffscheiben oder Filzringe angeordnet, um das Gleiten zu ermöglichen und Beschädigungen der axialen Flächen zu vermeiden.)
• ii) Aufbringen von wenigstens zwei in erfindungsgemäßer Weise gestalteten Wickelkernen auf die Kernträger vor oder nach dem Aufbringen der Kernträger auf die Wickelachse in einer solchen Weise, dass je Wickelkern wenigstens einer der Mitnehmer mit der Mitnehmerstruktur des Kernträgers zum Übertragen eines Drehmomentes in Eingriff steht.
• iii) Aufbringen je eines Anfanges des streifenförmigen Bandmaterials auf je eine umlaufende Außenfläche eines Wickelkerns. (Das Aufbringen und Befestigen des Bandmaterials erfolgt dann typischerweise mittels einer Kleberschicht oder eines überlappenden Klebebandes.)
• iv) Antreiben der Wickelachse zur Rotation in einer Wickelrichtung, wobei die Druckkraft der Kupplungsmittel derart eingestellt wird, dass die Kernträger unter Aufbringung einer für das Wickeln des Bandmaterials erforderlichen, auf dieses in dessen Längsrichtung wirkenden Zugkraft mit Schlupf von der rotierenden Wickelachse mitgenommen werden.

Finally, another aspect of the invention in a method for winding, in particular winding, of strip-shaped strip material, in particular following a separation of a material web by longitudinal section in at least two parallel webs strip-shaped web material. According to the invention, the method is characterized by the following steps:

• i) applying at least two hollow cylindrical, on an outer lateral surface in each case at least one driver having core carriers on a provided with respect to a radial direction and / or axially acting pressure force coupling means winding axis in the axial direction of the winding axis behind the other. According to the invention, this application takes place in such a way that the core carriers each rest with an inner circumferential surface on the winding axis and are coupled via the coupling means with a predeterminable transmission torque with the winding axis. (As an alternative to a radially acting compressive force, the regulated or controlled force, in terms of of which the coupling means are adjustable, are also applied axially. Then plastic discs or felt rings are placed between the - usually metallic - core carriers to allow for sliding and avoid damage to the axial surfaces.)
• ii) applying at least two winding cores designed in accordance with the invention onto the core carriers before or after the core carriers have been applied to the winding axis in such a way that at least one of the drivers per core is engaged with the carrier structure of the core carrier for transmitting a torque.
• iii) applying a respective beginning of the strip-shaped strip material on each circumferential outer surface of a winding core. (The application and fixing of the strip material is then typically by means of an adhesive layer or an overlapping adhesive tape.)
• iv) driving the winding shaft for rotation in a winding direction, wherein the pressing force of the coupling means is adjusted so that the core carriers are entrained by applying a required for the winding of the strip material, acting thereon in its longitudinal direction with traction from the rotating winding axis.

The present invention, for the purpose of solving the problem described, for the first time pursues a completely different approach, deviating from the practice hitherto practiced over decades:
It is the expression of a smooth-walled inner surface of a standard hub (eg and in particular frequent use of a cardboard tube) acting clamping force with the required complex design of the core carrier dropped by instead of the usual sleeve-like smooth-walled hub now the hub itself structured and Thus, the transmission of the torque or the entrainment effect is transmitted to a corresponding structure. This until then unimaginable and the invention in its scope of the simplifying solution largely constituting aspect and thought is the then in the episode a much simpler design of the winding device allows the consequence in particular that even with small core diameters now winding axes can be used, the have a diameter sufficient to give a satisfactory rigidity and rigidity even with greater length and with larger diameters resulting high winding load. Because by the expression of the driving structures on the inner surface of the winding core according to the invention, a core carrier can be made very simple and in the radial dimension low, so that even with constant standard inner diameter of the novel hub (eg 1 inch (1 ") or 3 inches (3") ), the core carrier can be kept small dimensioned in radial expansion, according to diameter large winding axles are structurally possible.

Of course, in the case of the winding core according to the invention, it should be noted that it has sufficient rigidity and dimensional stability in order to reliably give or impart the desired shape to the roll to be formed by winding a strip-shaped strip material, but also to support the entrainment structures To keep sufficiently stable to get here in cooperation with drivers of the core carrier secure transmission of torque.

Although the winding core according to the invention is more complex in its actual structure and therefore more expensive to manufacture than the cardboard sleeves traditionally used and frequently used. This alleged and initially ostensibly disadvantageous circumstance is however canceled by the fact that the winding core can be used according to the invention on winding devices with significantly simpler formed core carriers, on the one hand are already cheaper to purchase, on the other hand are significantly less maintenance and finally the above already referred to bring advantage to be dimensioned smaller in the radial direction and therefore allow the use of winding axles with larger diameters with otherwise the same dimensioned inner diameter of the male core with the above-mentioned advantages.

Advantageously, the winding core according to the invention distributed over the circumference of the inner surface at several circumferential positions have driving structures. This is e.g. allows even with a core carrier with only a single driver when starting the winding axis an engagement between the driver and the driving structures of the winding takes place already after a shorter rotation, so that here a secure torque transfer attack is given with a reliable rotation driving the winding core.

Moreover, the arrangement of entrainment structures at a plurality of positions distributed over the circumference of the inner surface, in particular at at least three positions, when these entrainment structures lie with their innermost portions on an inner circle concentric with the circular cross section of the outer surface, permits handling of the Winding core with conventional, especially for the unwinding of reels used winding devices having provided with jaws core carrier. Because then the jaws can already securely attack against the arranged at the various circumferential positions of the inner surface driving structures.

The above-described advantage of a secure engagement of a driver on the entrainment structures in a core carrier placed on the winding core according to the invention are further supported if along the entire circumference of the inner surface of the same formed, spaced-apart driving structures are provided with adjacent driving structures each having a same pitch to each other ,

In this way, the winding core according to the invention can be placed in different relative rotational positions on a core carrier with only one driver, without causing a different behavior depending on the rotational position of the attached winding core here. The fact that the driving structures are formed the same, here results in the same attack behavior of a driver and thus a same and well-defined startup situation when starting a winding axis, are arranged on the core carrier on which the hubs are placed according to the invention. Also with regard to the transmission of torque and here prevailing same conditions, an equal design of the driving structures offers.

Another advantage is obtained if, as provided according to a further advantageous embodiment of the invention as a possibility, the driving structures along the circumference of the inner surface are arranged so close to each other, that they in a clamping of the winding core with conventional jaw clamping devices or with so-called air axes, this provide a sufficiently defined attack surface. Here too, advantageously, the parts of the driving structures which project furthest inwards from the inner surface should in cross section lie on a circle of smaller diameter concentric with the circular cross section of the outer surface than the circular cross section of the outer surface.

The driving structures can be formed in particular web or ribbed. These entrainment structures may be web-like or rib-like from the inner surface inwards, i. directed away from the outer surface, projecting. Such ridge or rib-like driving structures formed can be easily implemented and offer good opportunities for attack for a driver.

According to a further advantageous embodiment of the invention can be provided that the driving structures have a directed in the circumferential direction of the inner surface course, which forces a centering of a cooperating with the driving structures driver. This may be achieved, for example, by web-like or rib-like entrainment structures running transversely to the circumferential direction of the inner surface, e.g. V-shaped, U-shaped or dragon-shaped are formed. In this course, a driver can intervene in accordance with the tip of the V or the dragon shape or in the bow of the U. As a result, as soon as the winder is switched on after positioning and starts the rotation, centering is automatically achieved. It is also possible to use web or rib structures which are not simply V-shaped, U-shaped or kite-shaped but have this structure several times, e.g. in the manner of a W structure, a double dragon structure or a double U structure. In this way, a plurality of drivers can be brought into engagement with the driving structures, or it can engage a driver with different positioning with respect to a longitudinal axis of the sleeve, which is formed by the winding core, and thus allow centering at different positions lying along this longitudinal axis. In addition, a multiple V-shape, which may also be pronounced as a zig-zag shape, further advantageous by seen in two directions seen attack structures, so that such a configured winding core for right- or left-handed winding shafts (eg winding or unwinding ) can be used with corresponding, a driver core carriers.

According to a further advantageous development of the invention, the winding core according to the invention can, with particular advantage, have an inner diameter of a tangential circle which contacts the furthest inwardly extending portions of the driver structures, which corresponds to a diameter customary for conventional winding cores, in particular 1 inch (1 "), 3 inches ( 3 "), 6" (6 "), 8" (8 "), 10" (10 ") or 12" (12 "). This ensures that the novel winding core according to the invention can also be used with such winding devices and winding machines, in particular also during unwinding, as they have been customary and widely used in practice, in particular those which allow the winding cores to be supported on simple winding axes (US Pat. Winding shafts), or those that work with conventional jaw tensioners.

Advantageously, the winding core according to the invention may consist of plastic according to another embodiment of the invention. In particular, according to a further development of this regard, the winding core according to the invention can be produced by 3D printing or laser sintering, in particular in situ, that is to say directly in the area of the winding device. This manufacturing form allows that Forming of hubs even with complex nature entrainment structures that can be achieved with other manufacturing processes only with great effort, since, for example, for production in the injection molding process limits are given in terms of mold releasability, also provide drawing processes in terms of shaping strong limitations. Moreover, in a production of the winding core according to the invention by 3D printing or laser sintering in, for example, a winding device in which a strip-shaped strip material is first applied to the winding core, can be directly produced as needed by a 3D printer or a corresponding laser sintering device, the one or the example may be integrated into the winding device. In this way, a stockpiling of cardboard cores as hubs, as is customary today, can rather in an automated controlled production already in providing the following changing job, the number of required hubs and their geometry in a control software for the 3D printer or The laser sintering device can be entered, this can create a corresponding batch of required winding cores in an exact number and matched to the selected cutting width of the strip or strip material and with the given geometries and then perform an automatic assembly, with which the hubs are given via core carrier to start a wrapping process. In addition to the storage of a variety of winding cores eliminates the otherwise always accruing waste, which always accumulates in a tailor-made cutting of winding cores of the required width of cardboard rolls supplied in standard lengths. In particular, for the 3D printing of the winding cores, cutting widths of a cutting device upstream of the winding device can be transmitted electronically, for example via data cables, to the 3D printers exporting the 3D printing, in order to obtain the knives positioned at different widths for processing a subsequent job Cutting device required to print hubs already during a current winding process and so time-saving and at the same time to save space to prepare the next job already.

A further advantage may result if the winding core according to the invention, as is possible according to a further advantageous development of the invention, has integrated into its structure a radio-addressable memory chip, in particular an RFID element. In particular, in high-quality roll-wound strip-type strip materials or those used in later use in a safety or functional critical area (for example, fiber mat material supplied to aircraft for the production of aircraft parts, for example carbon fiber composite airfoils), For example, it is desirable to provide the individual roll of strip material with additional product information, such as the manufacturer, time of manufacture, production lot, exact manufacturing machine, or the like. Such information is typically available on radio addressable memory chips, such as RFID elements, drop. Here again, the winding core according to the invention offers the advantage that such memory chips, in particular when the winding core is formed from plastic, e.g. and in particular by 3D printing, can be integrated into the matrix of the solid material of the hub immediately upon its production. In particular manipulations are then more difficult because the corresponding memory chip can not be removed or replaced without destroying the winding core.

In a further aspect, the invention relates to a winding device for winding, in particular winding, of strip-shaped strip material. This winding device comprises a rotationally driven winding axle. It also comprises at least one arranged on the winding axis, coupled with adjustable coupling force with the winding axis, at least one driver having core carrier. Finally, it has at least one winding core arranged on the core carrier according to the above-described aspect of the invention in that the driver of the core carrier engages with the entrainment structures of the winding core in order to transmit a torque bearing on the core carrier to the winding core.

The special feature of this winding device is in addition to the inventive and according to its design as described above and formed on the basis of the above-outlined also possible further developments formable winding core, the specially designed and matched to the winding core core carrier. Namely, this core carrier has at least one driver, which is in engagement with the carrier structures of the core carrier when the core carrier is properly applied to the winding core.

This winding device according to the invention can have sitting on the winding axis a plurality of core carriers, on which in turn a plurality of winding cores are arranged and coupled with these on the engagement of the driver on the driving structures. It does not necessarily have to be arranged exactly core core per core carrier and fitting on this. This may well - and depending on the axial length of the hubs - occur that several core carrier carry a single hub or even two hubs rest on a single common core carrier, in which case, however no independent speed of these two hubs can be adjusted.

The core carrier can be designed as simple as possible. In a preferred embodiment, the at least one core carrier of the winding device may have the shape of a hollow cylinder with an inner and an outer lateral surface, wherein the inner circumferential surface rests on the winding axis and is connected thereto via a slip clutch and wherein on the outer lateral surface of the at least one driver is formed radially outwardly protruding. In particular, the core carrier of the winding device according to the invention can be equipped or provided with a single driver.

A further development of the invention provides that the at least one driver is a circular cross-sectional driver pin. The circular cross-sectional contour in this case allows a simple and relatively resistance-free sliding of a winding core on the core carrier in the axial direction of the winding core. For in a correspondingly also rounded training of stop edges of the driving structures slides in a circular cross-section (or otherwise rounded) driver from these easier, so that no tilting or snagging is to be feared. Rather, the winding cores can be particularly easily pushed onto the core carrier in such a configuration.

• i. Es werden wenigstens zwei hohlzylinderförmige, auf einer äußeren Mantelfläche jeweils wenigstens einen Mitnehmer aufweisende Kernträger auf eine mit hinsichtlich einer radialen und/oder axialen Richtung wirkenden Druckkraft einstellbaren Kupplungsmitteln versehene Wickelachse in axialer Richtung der Wickelachse hintereinander in der Weise aufgebracht, dass die Kernträger jeweils mit einer inneren Mantelfläche auf der Wickelachse aufliegen und über die Kupplungsmittel mit einem vorgebbaren Übertragungs-Drehmoment mit der Wickelachse gekoppelt sind.
• ii. Es werden wenigstens zwei Wickelkerne mit den erfindungsgemäßen Merkmalen des oben zunächst beschriebenen Aspektes, also der dort beschriebenen Wickelkerne, auf die Kernträger aufgebracht. Dies kann alternativ vor oder nach dem Aufbringen der Kernträger auf die Wickelachse erfolgen. Dabei werden die Wickelkerne in einer solchen Weise auf die Kernträger aufgebracht, dass je Wickelkern wenigstens einer der Mitnehmer mit der Mitnahmestruktur des Wickelkerns zum Übertragen eines Drehmomentes in Eingriff steht.
• iii. Es wird je ein Anfang des streifenförmigen Bandmaterials auf die umlaufende Außenfläche eines Wickelkerns aufgebracht.
• iv. Schließlich wird die Wickelachse zur Rotation in einer Wickelrichtung angetrieben, wobei die Druckkraft der Kupplungsmittel in einer solchen Weise eingestellt wird, dass die Kernträger unter Aufbringung einer für das Wickeln des Bandmaterials erforderlichen, auf dieses in dessen Längsrichtung wirkenden Zugkraft mit Schlupf von der rotierenden Wickelachse mitgenommen werden.

Finally, in a final aspect, the invention also provides a method for winding, in particular winding, strip-shaped strip material, which can be used in particular following a separation of a material web by longitudinal cuts in at least two parallel running strip-like strip material , This method according to the invention is characterized by the following steps:

• i. There are at least two hollow cylindrical, on an outer lateral surface in each case at least one driver having core carrier on a provided with respect to a radial and / or axial compressive force adjustable coupling means winding axis in the axial direction of the winding axis successively applied in such a way that the core carrier each with a inner circumferential surface resting on the winding axis and are coupled via the coupling means with a predetermined transmission torque with the winding axis.
• ii. At least two winding cores having the characteristics according to the invention of the aspect initially described above, that is to say the winding cores described there, are applied to the core carriers. This can alternatively be done before or after the application of the core carrier on the winding axis. The winding cores are applied to the core carrier in such a way that each winding core is at least one of the drivers with the driving structure of the winding core for transmitting a torque engaged.
• iii. It is ever applied a beginning of the strip-shaped strip material on the peripheral outer surface of a winding core.
• iv. Finally, the winding axis is driven to rotate in a winding direction, the pressing force of the coupling means being adjusted in such a manner that the core carriers are slipped from the rotating winding axis by applying a tensile force necessary for winding the strip material to this in its longitudinal direction become.

Also with regard to the method, the above-mentioned advantages of the invention show up. In particular, winding cores having a small inside diameter (for example 2 or 3 inches) can be accommodated on relatively long winding axles, since the core carriers can be formed comparatively simply, in particular as solid sleeve rings with a driver protruding outwards from the outer surface Use of larger diameter compared to comparable known devices winding axles allowed without it lead to a deflection of the winding axis with correspondingly longer winding axles even at high loads (exerted in particular by up to wide diameters wound roles of the strip material).

Further advantages and features of the invention will become apparent from the following description of inventive embodiments with reference to the accompanying figures. Showing:

1a in a perspective view of a first embodiment of a winding core according to the invention;

1b a side view of the winding core 1a ;

1c a sectional view along in 1b registered section line AA;

2a one of the 1a Comparable perspective view of a winding core according to the invention according to a second embodiment;

2 B in an enlarged view the in 2a area marked B;

3 in a the 1a and 2a comparable representation of a winding core according to the invention according to a third embodiment;

4 an exploded view of a winding core according to the invention according to a further embodiment in conjunction with a core carrier according to the invention;

5a in a side view according to the winding core 4 arranged on the core carrier according to 4 ;

5b taken in a sectional view along the section line AA 5a , the arrangement according to 5a , omitted in this illustration, the ring body of the core carrier, only the driver is shown;

5c in an enlarged view the in 5b section marked B;

6 in a perspective view of the winding core according to the invention 2a and 2 B with for illustrating the mode of action registered driver of a core carrier not shown here; and

7 the arrangement of essential components of an embodiment of a winding device according to the invention with a winding axis and thereon arranged core carriers and winding cores in the embodiment according to 2a . 2 B and 6 ,

Shown in the figures are schematic illustrations of possible design variants of winding cores according to the invention, core carriers belonging to the invention and winding devices according to the invention. The figures are neither necessarily true to scale nor in all details in detail; they are intended only to illustrate possible embodiments variants and embodiments of the invention, which are described in more detail below with reference to these figures.

First, on the 1a to 1c Referenced.

In these figures, a first embodiment of an inventively designed winding core 1 shown in different views. This winding core 1 has a sleeve-shaped body 2 with an outer surface 3 and an inner surface 4 , outer surface 3 and inner surface 4 are like 1b can recognize, in cross-section circular and concentric.

The outer surface 3 of the winding core 1 is used, as is common in winding cores, the recording of a wound strip-shaped strip material, which when winding on the outer surface 3 growing up forming a roll or coil.

The special thing about that in the 1a to 1c shown, winding core according to the invention 1 are on the inner surface 4 formed, radially inwardly to the center of the circular cross-section of the inner surface 4 pointing takeaway structures 5 , The transport structures 5 are V-shaped, dragon-shaped or wedge-shaped and each have a point 6 in the same circumferential direction of the inner surface 4 , The transport structures 5 are in a uniform grid spacing along the circumferential course of the inner surface 4 distributed. Between the driving structures 5 are interspaces 7 leave. In these spaces 7 can, as will be described in more detail later, a driver, if necessary, several drivers, penetrate, for transmitting a rotary drive or a torque from a winding axis on the winding core 1 serves. This requires the V-shape of the driving structures 5 with a central wedge angle 8th a self-centering when a driver attacks there and in the circumferential direction of the winding core 1 is driven. In addition, the spaces are 7 formed so that they have to the edges of the sleeve-shaped body seen in the circumferential direction a greater opening width than in the middle, where the wedge angle 8th or the tips 6 are arranged. This design of the spaces 7 is independent of the concrete embodiment of the form of the driving structures 5 possible (is therefore also given for the embodiments to be described below or at least applicable) and facilitates a "threading" a driver, as will be described later.

The transport structures 5 are web-shaped and protrude over a certain height in the direction of the central axis of the sleeve-shaped body 2 , stand in that direction from the inner surface 4 in front. In particular in 1b It is easy to see that innermost plateau surfaces 9 the takeaway structures 5 are located in their cross-sectional profile on a further circle, which is concentric with the cross-sectional profile of the inner surface 4 and the cross-sectional profile of the outer surface 3 is. Here is the winding core 3 dimensioned so that the radius R of this further circle is selected according to the standard dimensions for the inner radius of the currently used hubs (eg 1 inch, 1.5 inches, 3 inches, etc.).

Due to this measure, the winding core according to the invention 1 also be used in existing winding machines, for example, with a jaw technology corresponding Fix hubs on winding axles. Appropriate jaws can on the plateau surfaces 9 the takeaway structures 5 due to the dense arrangement of the same along the circumference of the inner surface 4 attack safely and a trained as invented hub 1 safe and reliable handling in the same way as the known and conventional winding cores according to the prior art.

Finally, it can be seen that the driving structures 5 at their at the axial ends of the sleeve-shaped base body 2 rounded edges are rounded. This serves to improve the introduction of a driver in the appropriate space 7 , as will be explained later with reference to the other figures.

In the 2a and 2 B is another, differently formed embodiment of a winding core according to the invention 10 shown. This winding core 10 is essentially the same as the one in the 1a to 1c shown winding core, so that using the same reference numerals in the 2a and 2 B Reference may first be made to the above description. This is also the case of the winding core 10 a sleeve-shaped body 2 on with circular in cross-section and concentrically located surfaces outer surface 3 and inner surface 4 , Again, on the inner surface 4 Carrier structures formed, the web-like in the direction of the central axis of the sleeve-shaped body 2 from the inner surface 4 protrude. These transport structures, which in 2a and 2 B with the reference number 15 are again formed V-, wedge- or kite-shaped, but have with respect to the driving structures 5 according to the embodiment described above, a different shape. But first of all, there are also the takeaway structures 15 along the circumference of the inner surface 4 in a same grid, ie each with the same distance adjacent driving structures 15 arranged and leave between each again a gap 7 ,

Also the driving structures 15 have plateau areas 9 which, when viewed in cross-section, follow a circular path along a circle concentric with the cross-sectional circles of the inner surface 4 as well as the outer surface 3 and the around the central axis of the sleeve-shaped body 2 beaten. This shape of the plateau surfaces 9 again has the advantage already described above. Again, a corresponding radius R is chosen in accordance with the inner radii of previously known winding cores.

As can be seen, the shape of the driving structures deviates 15 from the shape of the driving structures 5 of the previous embodiment. In particular, the wedge angle, here a wedge angle 18 Deviating formed by there is provided a part-circular cross-section recess. This serves for the positive reception of a driver corresponding in cross-section with a circular shape to a core carrier (see below).

In 3 is shown a further embodiment of a winding core according to the invention and there with the reference numeral 20 designated. Also this one resembles in its construction essentially in the 1a to 1c shown winding core, so that with respect to the description again referred to the above statements. Again, a sleeve-shaped body 2 formed with a circular cross-section outer surface 3 and a cross-sectionally also circular and concentric with the cross section of the outer surface 3 applied inner surface 4 , On the inner surface 4 are again along the circumference of this inner surface 4 spaced along the same pitch driving structures 25 formed, as in the previous examples, web-like in the direction of the central axis of the sleeve-shaped body 2 from the inner surface 4 protrude. Also these transport structures 25 have plateau areas 9 on, which show in cross section a further circle, which, as in the previous embodiments also, concentric with the circular cross sections of the inner surface 4 and the outer surface 3 is arranged. Again, this circle is where the cross sections of the plateau areas 9 lie, formed in the radius corresponding to the inner radii of conventional and conventional winding cores, so as in the manner already described above, a handling of the novel and inventive winding core 20 to ensure existing expansion-capable pneumatically actuated clamping axes or mandrels given processing machines.

In contrast to the previously in the 1 and 2 shown hubs 1 . 10 the hub is different 20 again only by the shape of the driving structures 25 , These also still have a substantially V-, wedge or dragon shape, the shape can also be referred to as swinging. The summit 6 is more rounded compared to the previous examples, but again shows, as in the embodiments of the hubs previously shown 1 . 10 also, for all transport structures 25 in the same circumferential direction of the inner surface 4 , Again, the wedge angle 18 , which ensures a self-centering of an engaging there driver, rounded and adapted in shape to a circular cross-section driving pin.

In 4 is another embodiment of a winding core according to the invention 30 in Together with a core carrier 31 shown. The winding core 30 is initially again the same structure as the hubs shown in the previous figures and described above 1 . 10 . 20 , He also has a sleeve-shaped body 2 on with circular in cross-section outer surface 3 and inner surface 4 , The formed in cross section circular shape of the outer surface 3 and inner surface 4 are arranged concentrically to one another in this cross section, as in the previous embodiments. Take structures 35 stand web-shaped and in one embodiment as V or Keilbzw. Dragon form in the direction of the longitudinal axis of the sleeve-shaped body 2 from the inner surface in front. The transport structures 35 again have plateau areas 9 which are shaped to lie on a circumference in cross-section. The radius of this circle, on the cross section of the plateau surfaces 9 lie, in turn, corresponds to a conventional inner radius of conventional hubs. Also with the winding core 30 are the takeaway structures 35 along the circumferential course of the inner surface 4 arranged in the same pitch and leave between each a gap 7 ,

The core carrier 31 also has a sleeve-shaped body 32 with a circular cross-section outer surface 33 and a likewise circular in cross-section inner surface 34 on. Again, the cross-sectional contours of the outer surface 33 and inner surface 34 to each other concentric circles, which are about a longitudinal axis of the body 32 are beaten.

The radius of the cross-section circle of the outer surface 33 is chosen with less play than the radius of the course of the Plateauflächen 7 the takeaway structures 35 formed tangential circle. Accordingly, the winding core 30 over the core carrier 31 be guided. As can be seen, there is a driving pin 36 radially from the peripheral surface 33 at a single circumferential position of this outer surface 33 of the core carrier 31 in front. This driving pin 36 is sized to fit into one of the interstices 7 between adjacent transport structures 35 of the core carrier 30 can be introduced. Now with so on the core carrier 31 attached winding core 30 the core carrier 31 for rotation in a clockwise direction in the 4 driven, so drives the driving pin 36 in a corresponding wedge angle 38 a takedown structure 35 and centered automatically the winding core 3 on the core carrier 31 , wherein the winding core 30 on the outside surface 33 of the core carrier 31 in the axial direction with respect to the longitudinal axis of the sleeve-shaped base body 32 can be moved. He then transfers the moment of pressure to the hub 30 ,

With the inner surface 34 becomes the core carrier 31 mounted on a winding axis (not shown here) and rotatably coupled with this for transmitting a torque.

In the 5a to 5c is the interaction of the core carrier 31 with the winding core 30 according to 4 illustrated again in other views. It shows the 5a a side view of the on the core carrier 31 attached winding core 30 , in particular illustrating how the driving pin 36 in one of the interstices 7 between two of the on the inner surface 4 of the winding core 30 trained transport structures 35 engages and there to transmit torque from the core carrier 31 on the winding core 30 at the appropriate transport structure 35 attacks. In 5b this is again shown in a cross-sectional situation, with the sleeve-shaped basic body for illustration here 32 of the core carrier 31 omitted and only the driving pin 36 is shown. Enlarged shown is the in 5b indicated cutout B again in the 5c , There is particularly good to see how the driving pin 36 in the wedge angle 38 the takedown structure 35 engages and is recorded there. From this representation it is also clear once again how due to the V- or wedge-shaped or dragon-shaped shape of the rib or web-like driving structures 35 a centering of the winding core 30 is achieved when the driver pin 36 in the rounded here according to the circumferential cross-section of the driving pin 36 formed wedge angle 38 retracts.

The 5 and 6 show this interaction between driving pin 36 a core carrier 31 with corresponding hubs, here such hubs 10 according to the 2a and 2 B , again in another presentation. It shows the 6b a three-dimensional representation with the driving pin 36 , like this one with according to the peripheral contour of the driving pin 36 shaped wedge angle 18 for transmitting a torque and engages with the already described centering effect.

7 finally illustrates once again in a section the essential design of a winding device, in which a winding axis 40 core support 31 are pushed one behind the other in the axial direction (here is only one of the core carrier 31 completely illustrated, a second core carrier is only by its Mitnehmerstift 36 symbolizes) and where on the core carrier hubs 10 are attached and from the driving pins 36 that are at the takeaway structures 15 in like in 6 attack shown manner, be taken for rotation. It can also be seen that the outer diameter of the winding axis 40 essentially the inner diameter of the core carrier 31 corresponds, so that the winding axis 40 the core carrier 31 with formation of a driving clutch with rotationally driven winding axle with set in rotation. Here are - not shown here - on the winding axis 40 adjustable force or frictional engagement elements present, for example, with a pressure medium acted upon, extending in the axial longitudinal direction, the surface breaking through the expansion means, via which a friction clutch between the winding axis 40 and the core carrier 31 can be set variably depending on the torque to be transmitted. For winding a strip-shaped strip material is now on each of the hubs 10 on the outer surface 3 a beginning of such a strip-shaped strip material placed and fastened, and it is the winding axis 40 set in rotation. In this case, the drive of the winding axis 40 in such a way that it runs at a faster speed than the core carrier arranged on it 31 that is the core carrier 31 with slippage from the winding axis 40 be carried rotatory with a through the between the winding axis 40 and the core carrier 31 trained slip clutch limited torque. This type of drive is also applied to known core carrier and hubs and therefore need not be described in detail.

As in particular in 7 can be recognized, which is due to the design of the winding core according to the invention 10 particularly simple formed core carrier 31 (Ultimately, a sleeve-shaped body with a single from the outer surface projecting driver pin 36 ) formed very simple and robust, can be designed with a low height and transmits the torque safely on the hub 10 due to the interaction of the driving pin 36 with the driving structures 15 , The possible low height of the core carrier 31 allows a larger diameter design of the winding axis, so that this particular in winding cores to be used 10 can still be formed with a high torsional and bending stiffness of small inner diameter, so that the processing of wider webs is possible.

A further embodiment of the core carrier can also have several, in particular at least three, of the drivers described above, in order thereby to realize a better centering of the inner sleeve surface arranged concentrically during the winding process to the core carrier.

From the foregoing description of the embodiments shown in the figures and from these figures, the peculiarity of the present invention has once again become clear, and the clear advantages are evident.

The embodiments show only possible embodiments of the invention, which can be carried out in particular with a variety of numbers and shape of the driving structures on the winding core. Thus, corresponding driving structures deviating from those shown here can not be simply V-shaped (or wedge-shaped or kite-shaped), but in the manner of W. This would on the one hand the possibility of a drive with appropriately designed core carriers, comparable to the core carrier 31 , allow in both directions of rotation, in which a driving pin 36 engages either in the wedge-shaped opening on the underside of the W or in one of the wedge-shaped openings formed on the top of the W. In addition, in a driving through engaging in one of the V-shaped openings on the upper side of the W driving pin two different axial positions, so that you can work here in different axial alignment and centering. Likewise, the core carrier can be provided with more than one driver, wherein the drivers can be arranged in particular at different circumferential positions on the outer surface of the core carrier. However, the distances of the drivers should be chosen according to the grid dimension of the arrangement of the driving structures.

The invention in its general scope and meaning will now be given again in the following claims and referred to the features essential to the invention.

LIST OF REFERENCE NUMBERS

1

 winding core

2

 body

3

 outer surface

4

 palm

5

 entrainment structure

6

 top

7

 gap

8th

 wedge angle

9

 plateau surface

10

 winding core

15

 entrainment structure

18

 wedge angle

20

 winding core

25

 entrainment structure

30

 winding core

31

 core support

32

 body

33

 outer surface

34

 palm

35

 entrainment structure

36

 Carrier pin

38

 wedge angle

40

 winding axis

R

 radius

Claims (20)

Sleeve-shaped winding core ( 1 ; 10 ; 20 ; 30 ) for strip-shaped strip material having a circular cross-section in the circumferential outer surface ( 3 ) as a support for the strip-shaped strip material and with a circular cross-section in the circular inner surface ( 4 ), with which the winding core ( 1 ; 10 ; 20 ; 30 ) via a core carrier ( 31 ), characterized in that on the inner surface ( 4 ) inwardly projecting, transversely to a circumferential direction of the inner surface effective entrainment structures ( 5 ; 15 ; 25 ; 35 ) are formed. Winding core according to claim 1, characterized in that over the circumference of the inner surface ( 4 ) distributed at several circumferential positions transport structures ( 5 ; 15 ; 25 ; 35 ) are provided. Winding core according to claim 2, characterized in that along the entire circumference of the inner surface ( 4 ) formed equal, spaced-apart driving structures ( 5 ; 15 ; 25 ; 35 ), with adjacent transport structures ( 5 ; 15 ; 25 ; 35 ) each have a same grid spacing from one another. Winding core according to claim 3, characterized in that the driving structures ( 5 ; 15 ; 25 ; 35 ) along the circumference of the inner surface ( 4 ) are arranged so close to each other that they are at a Aufspann the winding core ( 1 ; 10 ; 20 ; 30 ) with conventional jaw chucks, these provide a sufficiently defined attack surface. Winding core according to one of the preceding claims, characterized in that the driving structures ( 5 ; 15 ; 25 ; 35 ) web or ribbed are formed. Winding core according to one of the preceding claims, characterized in that the driving structures ( 5 ; 15 ; 25 ; 35 ) one in the circumferential direction of the inner surface ( 4 ) have a centering one with the driving structures ( 5 ; 15 ; 25 ; 35 ) cooperating driver ( 36 ) enforces. Winding core according to claim 6, characterized in that the driving structures ( 5 ; 15 ; 25 ; 35 ) are simply or repeatedly V-shaped, U-shaped or dragon-shaped webs or ribs. Winding core according to one of the preceding claims, characterized in that an inner diameter (R) of one of the furthest inwardly projecting portions ( 9 ) of the transport structures ( 5 ; 15 ; 25 ; 35 ) touching tangential circle corresponds to a conventional winding cores usual diameter. Winding core according to claim 8, characterized in that the inner diameter (R) is 1 inch, 3 inches, 6 inches, 8 inches, 10 inches or 12 inches. Winding core according to one of the preceding claims, characterized in that it consists of plastic. Winding core according to claim 10, characterized in that it is produced by 3D printing. Winding core according to one of the preceding claims, characterized in that it has integrated into its structure a radio-addressable memory chip. Winding device for winding strip-shaped strip material with a rotationally driven winding axis ( 40 ), at least one on the winding axis ( 40 ), with adjustable coupling force with the winding axis ( 40 ), at least one driver ( 36 ) having core carrier ( 31 ) and one on the core carrier ( 31 ) such arranged winding core ( 1 ; 10 ; 20 ; 30 ) according to one of the preceding claims, that the driver ( 36 ) with the driving structures ( 5 ; 15 ; 25 ; 35 ) is engaged to one on the core carrier ( 31 ) Lasting torque on the winding core ( 1 ; 10 ; 20 ; 30 ) transferred to. Winding device according to claim 13, characterized in that the at least one core carrier ( 31 ) has the shape of a hollow cylinder with an inner ( 34 ) and an outer ( 33 ) Lateral surface, wherein the inner lateral surface ( 34 ) on the winding axis ( 40 ) rests and is connected to this via a slip clutch and wherein on the outer circumferential surface ( 33 ) the at least one driver ( 36 ) is formed protruding radially outward. Winding device according to claim 14, characterized in that the driver ( 36 ) is a circular cross-sectional driving pin. Winding device according to one of claims 13 to 15, characterized in that on the winding axis ( 40 ) in the axial direction one behind the other arranged a plurality of core carrier ( 31 ) are arranged. Method for winding strip-shaped strip material, characterized by the following steps: i. Application of at least two hollow cylindrical, on an outer circumferential surface ( 33 ) at least one driver ( 36 ) ( 31 ) on a provided with respect to a radial direction and / or axially acting pressure force coupling means winding axis ( 40 ) in the axial direction of the winding axis ( 40 ) in a row in such a way that the core carriers ( 31 ) each with an inner circumferential surface on the winding axis ( 40 ) and via the coupling means with a predetermined transmission torque with the winding axis ( 40 ) are coupled; ii. Application of at least two hubs ( 1 ; 10 ; 20 ; 30 ) according to one of claims 1 to 12 to the core carrier ( 31 ) before or after the application of the core carrier ( 31 ) on the winding axis ( 40 ) in such a way that each winding core ( 1 ; 10 ; 20 ; 30 ) at least one of the drivers ( 36 ) with the takedown structure ( 5 ; 15 ; 25 ; 35 ) of the winding core ( 1 ; 10 ; 20 ; 30 ) is engaged for transmitting a torque; iii. Applying one each of the beginning of the strip-shaped strip material to a respective circumferential outer surface ( 3 ) of a winding core ( 1 ; 10 ; 20 ; 30 ); and iv. Driving the winding axle ( 40 ) for rotation in a winding direction, wherein the pressing force of the coupling means is adjusted so that the core carrier ( 31 ) applying a required for the winding of the strip material, acting thereon in the longitudinal direction tensile force with slip from the rotating winding axis ( 40 ) get picked up. A method according to claim 17, characterized in that the hubs ( 1 ; 10 ; 20 ; 30 ) are produced by 3D printing. Method according to claim 18, characterized in that the hubs ( 1 ; 10 ; 20 ; 30 ) are produced in situ in the area of a winding device which carries out the method. Method according to one of claims 18 or 19, characterized in that during 3D printing of the hubs ( 1 ; 10 ; 20 ; 30 ) Cutting widths of an upstream cutting device are electronically transmitted to a 3D printer which executes the 3D printing, in order to produce the winding cores required for the processing of a subsequent job with differently positioned knives in the cutting device ( 1 ; 10 ; 20 ; 30 ) already during a running winding process to print.

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