DE102010041718A1 - Winding method and roll cutting device - Google Patents

Abstract

Winding method in which a material web, in particular a paper or cardboard web, is unwound from a parent roll and divided along its running direction in a longitudinal cutting process to form finished rolls, with the formation of a separating gap, and then wound up again, with at least two being wound during a winding process from the resulting partial webs forming finished rolls are formed end-to-end next to each other in a common winding bed by means of winding rollers, the finished rolls being formed and the winding rollers treating them forming parts of a common winding system. One would like to stabilize the winding process and, in particular, avoid high vibration amplitudes in the winding system. For this purpose, it is provided that a connecting element for bridging the separation gap is applied during at least one section of the winding process after the longitudinal separation process. The invention also relates to a roll cutting device.

Description

The invention relates to a winding method in which a material web, in particular a paper or board web, unwound from a parent roll and the formation of finished rolls in a longitudinal separation process along their direction, to form a separation gap, divided and wound up again, at least two Formed during a winding process from the resulting part webs forming finished rolls side by side in a common winding bed by means of winding rollers, wherein the forming finished rolls and the winding rollers they handle form parts of a common winding system.

Furthermore, the invention relates to a reel cutting device which has an unwinding device for a master roll in which a material web, preferably a paper or board web, can be unwound from a master reel,
a longitudinal separation section in which the material web is separable in the longitudinal direction while forming at least one separation gap in at least two partial webs
and a winding device which has a winding bed in which at least two finished side by side positionable finished rolls by means of winding rollers are formed and the forming Teilbahn- or finished rolls and the winding rollers treating them form parts of a common winding system.

The invention will be explained below in connection with the treatment of a paper web. However, it is also applicable to other webs that are similar to handle. These are, for example, but not exhaustive, to webs of cardboard, plastic or metal foils.

Paper webs are produced in relatively large widths of up to more than 11 m in a paper machine. The production is almost endless. In this case, the machine direction of the paper machine defines the longitudinal direction for all machines and devices located in the paper factory and the transverse direction perpendicular thereto in the horizontal plane. To simplify the present document, the longitudinal direction X-direction, the transverse direction as Y-direction and the height direction perpendicular to a plane defined by these two directions are referred to as Z-direction. At the end of the paper machine, the paper web produced is wound in full width onto a winding core. This winding core is replaced cyclically, usually during production. The resulting web-wide winding is commonly referred to as mother roll. In order to be manageable for a later user, for example a printing company, the paper web wound on a mother roll has to be cut into a plurality of parallel partial webs whose widths are suitable for the respective later user. These widths can vary greatly from case to case, so that the division of the paper web is usually made according to an individually definable pattern. The partial webs are then wound into so-called partial web or finished rolls and issued together as a so-called roll throw. The pattern can be changed from roll throw to roll throw. The slitting and winding is conveniently done in a single machine, which is widely referred to as a slitter-winder. In essence, such a slitter rewinder consists of a unwinding device, a cutting section and a roll-up device, wherein the cutting section has a number of mostly disc-shaped cutters adapted to the possible divisions.

In the embodiment of a slitter-winder, the person skilled in the art distinguishes between two basic types of construction, namely the support roller and the back-up roller. This is true even if at least one of the winding rollers forming in the winding process - d. H. Teilbahn- or finished rolls - influencing winding rollers is replaced by a, revolving around rollers, belt.

Characteristic of the roll carrier type, which is of sole interest for the present application, is a retractor, in which the entire roll throw in a winding bed, which consists of two support rollers, is wound on winding tubes. The winding tubes of the roller throw can be held by means of tensioning or guiding heads or, in rarer cases, through winding shafts inserted into the winding tubes. The rolls are wound up together, as a complete throw. As a rule, this is done by means of a circumferential winding, for which purpose at least one of the two support rollers can be driven. If a winding shaft is used, a center winding or a combination of both can also take place.

In general, additional pressure rollers are used, which provide in the initial stage of each winding for a desired level of winding hardness and should take over the course of the winding process often stabilizing tasks.

To ensure competitiveness and achieve high productivity, efforts are being made to achieve high production speeds. Here are all in the production chain of a paper mill located facilities or to orient machines at the production speed predetermined by the paper machine. Since a paper machine, apart from failure cases, works continuously, it is difficult for a discontinuous slitter to follow the speed presented, since set-up, acceleration and deceleration times corresponding to the task of format reduction incurred relatively often and therefore only by significantly higher production speeds are to be compensated.

This means that the reel-to-reel reel-to-reel set has to produce under extreme acceleration and deceleration in a "stop-and-go" process. The greatly increased production speeds of paper machines in recent years, the desire existing for economic reasons to follow the production of the paper machine with a single slitter and the grown especially in the upper format ranges spectrum of different consumer needs has resulted in today finished rolls in width ranges between about 0.2 m to 5.0 m and finished weights between a few hundred kilograms and 10 tons are produced. Their final diameter is usually about 1.5 m, with strong deviations are common. In this case, production speeds of up to 3000 m / min are sought, which should be achieved between acceleration and deceleration phases of 40 m / s ² to 60 m / s ² .

However, such high demands on the winding process and, associated therewith, on the slitter-winder still pose a high risk potential due to vibrations occurring.

The winding to be produced hardly takes on an ideal round shape. Small winding errors, for example, due to slight profile fluctuations of the paper web to be wound, add up with each full wrapping. Due to the periodic recurrence of the respective winding defects of the rotating coil, vibrations of corresponding frequency are formed depending on its circumference and peripheral speed.

With increasing production speed, the excitation frequency is always greater (with increasing peripheral speed, the same position of the winding more and more often passes through the same winding gap) and the exciter amplitude is increasingly violent (at the same time as its winding diameter and its unevenness and the effective weight increases). In this case, the probability increases greatly that form during this complex process vibrations that are suitable (via integer harmonics) to form resonances with the winding rollers of the winding machine, which can lead to a fierce, sometimes rapid "rocking" of the entire machine. As is known, in extreme cases, reels can be ejected from the winding bed.

At today's desired production speeds, there is hardly any economically viable option to interpret the natural frequencies of the support rollers involved so that a possible Eigenstimmulierung the system can be reliably excluded and superimposed to take a variety of other vibration indicators on the machine under a group of vibration indicators together are.

Mainly influenced by the aforementioned group, ie the vibration indicators that are essentially related to the paper web to be processed, also frequently observed other phenomena occur, which are at least partly due to a freedom of movement of the individual roles with each other. Observations have shown that critical winding phases can form in particular when the partial web rolls have reached or pass through a winding diameter of about 800 mm to 1100 mm.

The invention is therefore based on the object, a method and an apparatus for winding a web on a winding tube such that the conditions in the winding area will stabilize. In particular, high vibration amplitudes are to be avoided within the winding system.

According to the method, the object of the invention is achieved in that during at least a portion of the winding process after the longitudinal separation process, a connecting element for bridging the separation gap is applied.

Essential to the invention is thus the bridging, that means in sections "reconnection" of a separation gap created by a, within the same winding process and the subsequent resumption of the longitudinal separation process.

It is particularly advantageous if such a bridging during the main winding phase, ie after the acceleration phase at the beginning and before the deceleration phase at the end of the winding process is carried out because the vibration critical winding phases often in fall within this area or at least be initiated in this area.

Likewise, it may also be advantageous if during the acceleration phase, in particular towards its end or during the deceleration phase, in particular during the initiation period of the deceleration phase, the method according to the invention is used, since partly violent roll swings can occur in these periods, which is then mostly initiated by web tension fluctuations and can quickly become dangerous.

In the method according to the invention adjacent partial web rolls are connected during their formation process and thus calmed in their operating properties, whereby their natural frequency is changed. The connection takes place in a diameter range, which is spaced both from the outer diameter of the winding tube (s), as well as the final diameter of a finished wound to finished roll.

Preferably, a Verbindungselemenent is applied, which has at least partially an adhesion promoter.

In this way, a rapid connection to the sub-web roles to be connected is ensured and minimized the risk of unintentional displacement or loss of the respective connecting element.

In order to produce a particularly stable connection and to keep the cost of an exact positioning in the Y direction of the applied connecting element low, it is advantageous if the bonding agent is in contact with the entire surface of the connecting element.

In contrast, only a partial coverage of the connecting element with a bonding agent may be advantageous because, for example, the risk of edge contamination on the forming part of web rolls is then particularly low. Likewise, costs can be saved.

It is very particularly preferred if, seen in the running direction (X) at the rear end of the respective connecting element no bonding agent is provided, since the resulting Teilbahn- or finished rolls are processed in later processes, such as in a printing process, the other way round. In this way, namely the beginning of the respective connecting element only loosely with the partially covered by him winding layer of the respective Teilbahn- or finished roller in contact, that is, the connecting element can then be well dissipated or removed, for example, by blowing air or a small customer or the like ,

For this purpose, it may be particularly preferred that the connecting element at the transition between a region having a bonding agent and a region which has no bonding agent embossing, for example, an edge or a Pfalz is introduced to facilitate a later detachment.

Both over the entire surface as well as partial contact with fasteners in contact fasteners can already be available as prefabricated compounds, in particular laminates.

In other cases, however, an adhesion promoter can also simply be applied together with the connection element. However, this then has the distribution that the user remains very free in his choice regarding the coverage of adhesion promoter to fastener.

It may be advantageous to use a setting adhesive. Bonding adhesion promoters are available on the market at low cost. In this way, especially strong bonds are possible.

It is advantageous if a bonding agent is used, the adhesive structure under operating conditions, especially in a temperature range of 8 ° C to 65 ° C, especially from 15 ° C to 50 ° C remains open, that is not completely binds.

In this way, a particularly uncomplicated redetachment of the connecting element is made possible. The connecting element may be "withdrawn" from the surface of or partially covered by it wound layer (s) of the respective partial web roll then so easily, such as a Post-it ^® product.

With particular advantage, a bonding agent is used, which dissolves independently after a certain time interval.

This offers the advantage that the connection between adjacent Teilbahn- or finished rolls after a certain period again dissolves independently and the cost of a separation is eliminated or at least significantly reduced. It may be very particularly preferred that the bonding agent is set so that it is in contact with the surface of the partially covered by him winding layer (s) is set such that it holds the remaining time of the respective winding process and then, possibly after a certain amount of time security, it dissolves again.

For example, it is then preferred for the activity time of the adhesion promoter to correspond approximately to the duration of a winding process. This duration is normally known to the operator of a slitter-winder and generally does not change much from wrapping process to wrapping process. It is then irrelevant whether the sub-web rolls to be joined are joined together in a rather initial winding stage, in the preferred middle winding stage or in a period of time which tends to end the winding process. The finished rolls are then output together as a roll set and can then be stored preferably in a first waiting area outside the winding bed. This is also useful if not all finished rolls of a set of rolls are connected to a neighboring finished roll. After a period corresponding to that of a winding process and begins with the time of the connection or the last made connection, the finished rolls are then isolated, for example, in which they are rolled against staggered stop positions. The individual finished rolls are then ready for transport.

It should be noted here that the field of development of self-dissolving adhesion promoters is currently developing relatively strongly. Such adhesion promoters but are for example from the DE 101 60 320 A1 already known and cover the preferred time interval here by far.

If the connecting element itself consists of such a bonding agent, a particularly secure and comfortable separation process is ensured. In a subsequent process, due to their gravity, possible residues simply fall down during unwinding or can be blown off, for example from the top of a paper web located in the unwinding process.

With great advantage, an adhesion promoter can be used, which dissolves under an energetic influence.

In other cases, for example, if there is no possibility spatially to set up a temporary storage described above, or if the operator exceptionally must expect fluctuating process intervals between individual winding processes or possibly for cost reasons, it may be advantageous if the bonding agent under energetic Influence dissolved or at least weakened or deactivated in his bond strength.

This can then, for example, but not exhaustively, by means of sound waves, preferably ultrasonic or hypersonic waves, under the action of light rays, preferably laser or UV rays, or occasionally also with the help of a temperature influence, for example by a (targeted) heat or cold treatment , be initiated. Then, for example, an at least partial evaporation of the connecting element can be achieved.

It is preferred that a connecting element is applied, which consists of a metal in a thickness of 0.01 mm to 2.0 mm, preferably between 0.05 mm and 1.15 mm, very preferably between 0.05 mm and 0, 75 mm,
or from a thermoplastic in a thickness of 0.005 mm to 2.0 mm, preferably between 0.01 mm and 1.3 mm, very preferably between 0.1 mm and 0.8 mm,
or consists of a paper in the thickness of 0.005 mm to 2.0 mm, preferably between 0.02 mm and 1.3 mm, more preferably between 0.1 mm and 0.8 mm,
or completely consists of a coupling agent, preferably in the starch area mentioned for thermoplastics.

In this case, the connecting element is preferably applied as a strip-shaped connecting element having a width (Y) between 3 mm and 65 mm, preferably between 5 mm and 40 mm, most preferably between 7 mm and 30 mm.

It is particularly advantageous if the width and the position of the connecting element is chosen such that the at least temporarily covered by the connecting element area of Teilbahn- or finished roller in a subsequent process, such as in advance of a printing process, is removed by a trim.

The length (X) of course depends on the application, in particular on the scope to be covered. The strip-shaped connecting element is therefore preferably stored as roll material and unwound and applied in desired lengths.

Particularly preferably, a connecting element is applied, which has a weakened in its cross-section and or perforated region.

In this case, the connecting element is then preferably applied so that the area covers the separation gap or in its immediate vicinity, for example up to a maximum of 1 mm is settled to 2 mm within a Teilbahn- or finished roller.

In this case, the weakening can be carried out in such a way that the forces usually prevailing in the winding process between adjacent Teilbahn- or finished rolling, which are eager to move against each other, are collected and the weakening only in terms of a targeted application of force is then made outside the winding bed, sensitive.

It is also particularly preferred that a connecting element is applied which has a weakening agent, preferably a tear thread, a tear strip, a layer or the like.

Such a connecting element is applied analogously to the aforementioned embodiment variant and has over this the further advantage that the connecting element retains its full stability during the winding process and is weakened or divided only after completion of the winding process.

In this context, a layer is understood to mean a layer which is suitable for separation formation, which therefore, for example, decays after a time interval or under specific external influence, expands or expands relatively rapidly, contracts or is similarly suitable for causing crack formation in the connection element initiate.

It is of great advantage if the connecting element is applied in a plurality of sections distributed over the circumference of the partial web rolls or finished rolls to be connected,
or
the connecting element in 1 to 20, preferably 1 to 8, more preferably 2 to 5 continuous wraps, is applied.

If several shorter sections of connecting elements are applied over the current circumference of the adjacent partial web or finished rolls, this offers two significant advantages.

On the one hand, high stabilities can be achieved with low material and cost, on the other hand, with a suitable arrangement, a window is free through which a later separation element can be brought through to separate the compound then very clean and crack-free from inside to outside.

If a separation gap is covered by means of a single connecting element extending after winding over at least one circumference, a considerably quieter application is possible, since, as mentioned, it is preferable to work at high speeds. Due to the geometric arrangement creates a particularly strong connection, so that only lower requirements are to be placed on the stability of the connecting element, ie its material and its material thickness.

Preferably, the application of the at least one connecting element is initiated on the basis of measured data.

In this way, stabilization can be intervened as needed in the winding process. Such a trained method can therefore be used individually. Possibly complex subsequent separation processes are only necessary if the winding process of a particular roller set currently in production is to be calmed. Thus, a method of this kind can certainly comprise a daily production at which only some of the roller sets to be manufactured, for example, in a clock cycle of approximately 5 to 15 minutes, are stabilized by a connection of adjacent partial web rolls. Such a method according to the invention thus provides a very high degree of security for each individual roller set to be created.

In contrast, it may occasionally be advantageous if the application of at least one connecting element is initiated on the basis of a defined program sequence.

Frequently, papers of different types are produced on one and the same paper machine, but their parameters, such as area weights, are repeated over a certain period of time.

The same applies to the cutting patterns to be produced on the reel cutting devices. In paper mills, which produce a relatively manageable spectrum of such variations, it may therefore be useful to carry out a method according to the invention on the basis of stored program sequences. This saves, for example, a certain amount of necessary control or regulation technology.

The program sequence can be created, for example, on the basis of calculations or experience.

It is advantageous if at least one connecting element is applied shortly before or when a critical natural frequency of the winding system or at least part of the winding system is reached.

In this way, the achievement of critical vibration conditions is effectively prevented and ensures a smooth winding process. Thus, the production of high quality bobbins at high production speeds is made possible.

It is preferred that at least one connecting element is applied over the separation gap of two adjacent Teilbahn- or finished rolling when the two Teilbahn- or finished rolls during their training a certain difference in diameter, preferably of at least 0.5 mm, occasionally of at least 1.0 mm and exceptionally exceed at least 2.0 mm.

The first-mentioned limit guarantees a particularly gentle winding, as vibrations are particularly effectively prevented here. Accordingly, such a further developed winding method is capable of exceptionally high winding power also with regard to the achievable winding speeds.

However, the second-mentioned limit is completely sufficient for the normal cases and keeps the costs low, since connecting elements (with adhesion promoter) are saved and unnecessary expenditure for subsequent separation processes is kept within limits.

For simple applications, a tripping ratio of about 2 mm is often sufficient. Then, although probably already slightly loss of quality in the winding result must be taken into account, but the operator is in rational production still a highly effective backup method available, if the diameter differences strive for a critical value.

With particular advantage, at least one connecting element is applied at a web speed of more than 800 meters per minute, preferably more than 1200 meters per minute, very preferably more than 1500 meters per minute.

Thus, the manufacturing process can be operated particularly effectively. It is preferred that when bridging the at least one separation gap, the currently applied web speed is reduced by not more than about 10% to 15%. Most preferably, the web speed is maintained even within the usual tolerance ranges and can then be as high as 2500 meters per minute, 2800 meters per minute or even up to about 3000 meters per minute in modern slitter machines.

It is preferred that the longitudinal separation process comprises a plurality of individual separation processes distributed temporally in parallel and over the CD direction (Y) of the material web and (at least with regard to temporal overlapping) at least one connecting element being applied over only a part of the separation gaps.

In this way, the winding process can be stabilized particularly efficient, since only those forming sub-web roles are stabilized, of which a risk of vibration is to be expected or from which already a vibration focus concretely.

Overlapping in time means that the bridging of the individual longitudinal separation processes does not have to be exactly synchronous, although a temporally exactly parallel operation is preferred in most cases.

For a particularly economical and efficient use of the method according to the invention, it may also be preferred that only those or those individual separation processes, which seen the material web in the CD direction (Y), are reconnected longitudinally in their middle region by means of connecting elements, while the marginal Einzeltrennprozesse be maintained.

In fact, in most cases, a risk of vibration from the, seen in the Y direction, middle area of the winding bed be assumed, so in a corresponding embodiment of the method according to the invention, the winding process can be calmed efficiently and unnecessary effort in conjunction with the otherwise for the edge finishing rolls to be performed separation processes after completion of the winding process is avoided.

From the same point of view it may moreover be preferred that the finished rolls to be joined are selected according to format and position in the winding bed such that a single interruption and resumption of the longitudinal cutting process is sufficient to achieve critical vibration conditions of a part of the winding system or the winding system over the to avoid the entire winding process.

Does the operator the engagement according to the invention, that is, the interruption and resumption of the longitudinal separation process and the pattern, ie format and location of the finished rolls to be produced according to the latter embodiment, a winding process is particularly safe and efficient calmed.

According to the device, the object of the invention is achieved in that the slitter longitudinally behind the longitudinal part has a device by means of a connecting element for bridging the at least one separation gap between two adjacent partial webs or between two adjacent Teilbahn- or finished rolls can be applied.

A thus characterized roll cutting device is thus particularly advantageous for carrying out a method according to the invention.

It is advantageous if the device consists of several, in the CD direction parallel in a selectable distance to each other alignable individual devices.

For this purpose, at least one guide can be provided.

It is advantageous if the device or its individual devices can be positioned according to the longitudinal dividing section and is preferably forcibly coupled thereto.

It is advantageous if the device is formed from an output device which comprises an output and a pressure device. With particular advantage, the output device may also have a Pfalzeinrichtung, by means of which the distributable connecting elements are profiled. In particular, it is then conceivable that a connecting element, which has a bonding agent in its initial region, receives a transverse gap in the subsequent region in order to be easier and safer to remove in a subsequent unwinding process, which is known to occur in the reverse direction of the winding process.

As a result, connecting elements which have a bonding agent or consist of a bonding agent, particularly uncomplicated and safe orderable.

Likewise, it is conceivable that the device has an application device which is suitable for applying liquid or atomized adhesion promoter. An additional fixed connection element does not have to be additionally required. For example, the device below the separation gap form an area where the coatable adhesion promoter is not abbindbar. Advantageously, this area can then be formed by a circumferential band, whereby disturbing remnants of adhesion promoters passed through a separation gap can be transported away. The circulating band can then have, for example, a cleaning device on its underside.

It is advantageous if the roll cutting device has a control / regulating unit with which the roll cutting device can be controlled or advantageously even regulated.

It is then advantageous if the control / regulation unit is connected to at least one sensor for collecting measurement data within the slitter-winder.

It is also advantageous if the control / regulation unit is suitable for taking measurement data which has been collected in a device upstream of the slitter-cutting device for producing and / or finishing a material web, in particular a paper or board web.

For this purpose, it is particularly suitable if the control / regulation unit of the slitter-winder device is connected to a control / regulation unit of an upstream device for producing and / or refining a material web via a data network. Then it is even possible that such an upstream device can be influenced under the influence of the control unit of the slitter-cutting device.

It is particularly advantageous if at least one, the at least one sensor for detecting the speed of the incoming material in the winding web, for detecting the rotational speed of individual Teilbahn- or finished rolling, for detecting vibrations of the winding system or at least a portion of the winding system and in particular for Movement of individual Teilbahn- or finished rolls is suitable.

• – Eine Auswerfereinrichtung mit in CD-Richtung positionierbaren Auswerfern.
• – Ein Behandlungseinrichtung, die vorzugsweise eine Heiz- oder Kühleinrichtung, eine UV-Licht- oder Lasereinrichtung eine mechanische Trenneinrichtung, insbesondere in Form einer Schneideinrichtung oder eine Ultra- oder Hyperschall erzeugende Einrichtung umfasst.
• – Einen Zwischenlagerungsbereich
• – Eine Schräge
• – wenistens eine Stoppstelle

It is furthermore advantageous if the slitter-cutting device has a separating device which comprises at least one of the following means:

• An ejector device with ejectors positionable in the CD direction.
• A treatment device, which preferably comprises a heating or cooling device, a UV light or laser device, a mechanical separating device, in particular in the form of a cutting device, or an ultrasound or hypersonic device.
• - An intermediate storage area
• - A slant
• - at least one stop point

The advantages of a roller cutting device according to the invention and its preferred embodiment features can be found in accordance with the description of the advantages of the method according to the invention and its advantageous embodiments.

The invention is explained in more detail below with reference to exemplary embodiments with reference to the drawings. It shows

1 a schematic representation in side view of a slitter according to the invention

2 a schematic representation of an exemplary embodiment of an advantageously designed applicator

3 a highly abstracted representation of a connection of two adjacent partial webs by means of a connecting element

4 Sectional view of juxtaposed ready rolling in a common winding bed which were wound by means of a winding method according to the invention

5 exemplary embodiment of a compound according to the invention generated two adjacent sub-web roles in a side, partially cut representation

In 1 is a highly schematic way a slitter according to the invention 1 represented in the left image area an unwinding device 2 in which a paper or board web M from a parent roll 3 is developable. The paper or board web M is then through a longitudinal separation section 4 feasible, in the example shown as a longitudinal cutting device with positionable in y-direction format selection knife pairs 23 is realized, wherein each pair of knives 23 by a driven disc-shaped upper or cutting knife 16 and a revolving bottom or pot knife 17 is formed. The longitudinal cutting section 4 is in the x-direction by a front and a rear guide roller 11 limited, which of course can also consist of individual segments.

The paper or board web M is then in the course in a, two axially parallel support rollers 18 . 19 , formed winding bed 6 feasible in the y-direction frontally juxtaposed partial web or finished rolls 7 are imageable.

This is at least one of the two support rollers 18 . 19 drivable.

Preferably, however, both support rollers 18 . 19 drivable and are available via a common control and / or regulating device 20 in connection. It has been proven that when, in the direction x of the paper or board web M first support roller 18 speed controlled and the second support roller 19 is torque-controlled. Also, an elastic storage of at least one support roller 18 . 19 conceivable. Likewise, the axes can 21 . 22 the support rollers 18 . 19 be stored at different height levels in the z direction. Furthermore, the support rollers 18 . 19 have different diameter.

Of course, at least one of the two support rollers 18 . 19 also a, on the paper or board web M becoming effective coating or sheathing, while, for example, the other support roller 18 . 19 is designed as a steel roller. Furthermore, at least one of the support rollers 18 . 19 have a passive or active damping or a repayment element. However, these advantageous embodiments are known to the person skilled in the art and are not shown here in detail for reasons of clarity.

In the example shown, the - at least at the beginning of the winding process - aligned successively winding cores 15 ' in its axial extent the distance between two adjacent pairs of blades 23 the longitudinal dividing part 4 correspond. The winding tubes 15 ' may preferably consist of cardboard or plastic. The most common diameter parameters in the market are 75 mm and 150 mm. To influence on the winding hardness profile, in particular at the beginning of a respective winding process and for stabilizing influence, in particular in the further course of the respective winding process, has the illustrated slitter 1 a pressure roller device 24 on. This consists in the example shown of several, in the y-direction one behind the other and together on a movable in the z-direction traverse 26 arranged Andruckwalzensegmenten 25 , In further embodiments, not shown, these Andruckwalzensegmente 25 also together or independently of each other laterally along the circumference U of the forming Teilbahn- or finished rolls 7 be relocatable.

The carrier rolls 18 . 19 and the pressure roller segments 25 the pressure roller device 24 are collectively referred to as winding rollers, by means of the Teilbahn- or finished rolls 7 are bildbild and during each winding process together with these a winding system 8th form in which mutually outgoing oscillations interact with each other.

As already described, such vibrations can arise for a variety of reasons and usually negatively impact each other negatively on the winding process and the winding result. Not infrequently, the maximum in a winding process to be implemented Winding speed V is limited by vibrations occurring, and occasionally, especially in simpler paper or board grades, certain quality losses are already taken into account at the winding speeds then driven.

At least part of the indicators responsible for these vibrations is due to a certain mutual freedom of movement of being next to each other in the changing bed 6 forming Teilbahn- or finished rolls 7 due.

According to the invention, at least two of the at least two partial web rolls or finished rolls forming side by side are produced 7 during the winding process by a, in its length (X) limited bridging of the separation gap in at least one section connected to each other for the further course of the winding process.

As in 3 shown then run the two adjacent and at least one section 27 connected sub-webs M '"together" in the winding bed 6 one. The length of the section 27 can, depending on the design of a slitter according to the invention 1 always be the same measure. Preferably, the slitter has 1 however, an output device 32 on, which are designed such that the length of the one or more sections 27 is selectable. A preferred output device 32 includes a housing 34 in which a path defined length of a coil for forming connecting elements can be unwound. It is preferred that the output device 32 , preferably along a guide 35 synchronous with the separating devices, here the knife pairs 23 across the transverse direction (Y) of the slitter-winder 1 positionable. For this separation device and output device can also form a structural unit or, as shown here, be arranged spatially separated.

It is preferred that the length of the respective section 27 corresponding to the current diameter D of the forming Teilbahn- or finished rolls 7 and the current winding speed V, possibly also present acceleration or deceleration characteristics, is adaptable such that a compound of the adjacent sub-web roles 7 over 1 to 20 winding layers, preferably over 1 to 10 winding layers, very preferably over 2 to 5 winding layers results. Of course, the winding layers do not have to be reached in integer steps.

For better separability of the connection, it is quite preferred that the winding layers are not completely connected in itself, but that the longitudinal separation process is interrupted in short successive periods and resumed. In such a trained, in 5 can be reached, for example, two free spaces F within the connecting section 27 form, which, starting from the partial web or finished rolling center, opposite, so a common escape with the winding tube 15 ' form. It is then very preferred that the free spaces F form a clearance, which is slightly larger than the diameter of the winding tube used 15 ' so that a separation medium, such as a blade 28 , in the free space F is insertable, and the connection is separable from the inside out.

This is one, possibly during the winding process under the winding load elongated winding tube 15 ' So do not hurt or hinder the separation process.

In 2 is an exemplary embodiment of a device designed as an application device 31 shown, which is an output device 32 and a pressure device 33 having.

output device 32 and pressure device 33 are in sync with theirs, in 1 illustrated pair of knives 23 Positionable in Y direction. This is exemplified on the bottom of the case 34 the output device 31 a guide 35 represented in the form of a dovetail guide. The leadership 35 Of course, any, and preferably, one known to those skilled in the art with the known designs for positioning knife pairs on slitter-winder devices, may adopt known designs.

The housing 34 the output device 32 offers a supply roll not shown in detail one, sections with a bonding agent 37 acted upon, or already acted upon, strip-shaped connecting means, from which by applying to the sections to be joined 27 the partial webs M 'and cross-cutting fasteners 36 can be generated.

The pressure device 33 stands for rapid mobility with two electromagnets 29 in operative connection and is seen in the z-direction between two by the two electromagnets 29 predeterminable positions umstellbar, wherein the pressure device 33 with the paper or board webs M to be connected in contact and above with the output device 32 enters into operative connection. The other position P ', however, represents the waiting position.

Preferably, the entire process takes place within one second, more preferably even fractions of a second.

To avoid unwanted cracking is after 1 a web stabilizer 10 intended. The here immediately before and behind the knife pair 23 arranged guide rollers 11 then form associated with them secondary roles 12 Nips (ie nips), the cracking in connection with the operation of a bridging seam 30 reliably prevent.

In the 1 shown ejector devices 14 of which, of course, only the foremost one can be seen in the side view shown, are along the Y-direction corresponding to the individual longitudinal separating devices of the longitudinal dividing section 4 positionable and act when ejecting, that is to say exactly when ejecting or rolling out. the finished rolls 7 on the joints between two adjacent and inventively connected finished rolls 7 , As a result, stretch the joints and can be separated in a suitable manner to form a particularly accurate and clean separation or cutting edge of each other. It is economically advantageous that no additional production time is required by the temporal overlap of the ejection process and the separation process and high efficiency of the slitter 1 is guaranteed.

In the same figure, another device for separating the connected finished rolls is shown. In practice, roll cutting devices equipped according to the invention will of course only have one of the two separating devices shown here.

This second device for separating the connected finished rolls is essentially an intermediate storage area 38 in the preferably finished rolls, which have a compound with time-dependent strength are stored. As already described, the time interval of such connections is preferably set to the duration of an average winding process. The finished rolls 7 then, after release under their own weight roll a slope 39 down and are by individually controllable stop 40 separated.

From the illustrated embodiments may be departed from in many ways, without departing from the spirit of the invention.

LIST OF REFERENCE NUMBERS

1

Rolling cutter

2

unwinding

3

motherhood

4

Long racing game

5

takeup

6

winding bed

7

Partial web roll, finished roll

8th

winding system

9

sensor

10

Track stabilizing device

11

deflecting

12

secondary role

13

separator

14

ejector

15 '

mandrel

16

Upper knife, cutting knife

17

Bottom knife, pot knife

18

king roll

19

king roll

20

Control / regulating device

21

axis

22

axis

23

pair of blades

24

Andruckwalzeneinrichtung

25

Andruckwalzensegment

26

traverse

27

section

28

blade

29

electromagnet

30

Separation gap / separation seam

31

Means / (applicator)

32

output device

33

pressure device

34

casing

35

guide

36

connecting element

37

bonding agent

38

Temporary storage area

39

slope

40

stop point

D

diameter

F

free space

M

web

M '

part web

P

position

P '

position

t

Time / Interval

U

scope

V

Web speed, winding speed

X

Longitudinal direction, MD, running direction

Y

Transverse direction, CD

Z

height direction

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 10160320 A1 [0035]

Claims (15)

Winding method in which a material web (M), in particular a paper or board web, from a parent roll ( 3 ) and to form ready-made rolls ( 7 ) in a longitudinal separation process along its running direction (x), forming a separation gap ( 30 ), and then wound up again, wherein at least two finished rolls forming during a winding process from the resulting partial webs (M ') ( 7 ) side by side in a common winding bed ( 6 ) by means of winding rollers ( 18 . 19 . 24 ) are formed, wherein the forming finished rolls ( 7 ) and the winding rollers ( 18 . 19 . 24 ) Parts of a common winding system ( 8th ), characterized in that during at least a portion of the winding process after the longitudinal separation process, a connecting element ( 36 ) for bridging the separation gap ( 30 ) is applied. Winding method according to claim 1, characterized in that a connection element ( 36 ) is applied, the at least partially an adhesion promoter ( 37 ) having. Winding method according to claim 1 or 2, characterized in that an adhesion promoter ( 37 ) is used, the adhesive structure under operating conditions, in particular in a temperature range of 8 ° C to 65 ° C, especially from 15 ° C to 50 ° C remains open, that is not completely binds. Winding method according to one of the preceding claims, characterized in that a bonding agent ( 37 ) is used, which automatically dissolves after a certain time interval (t). Winding method according to one of the preceding claims, characterized in that a bonding agent ( 37 ), which dissolves under an energetic influence. Winding method according to one of the preceding claims, characterized in that the connecting element ( 36 ) of a metal in a thickness (Z) of 0.01 mm to 2.0 mm, preferably between 0.05 mm and 1.15 mm, more preferably between 0.05 mm and 0.75 mm, or from a Thermoplastic in a thickness of 0.005 mm to 2.0 mm, preferably between 0.01 mm and 1.3 mm, more preferably between 0.1 mm and 0.8 mm, or from a paper in the strength (Z) of 0.005 mm to 2.0 mm, preferably between 0.02 mm and 1.3 mm, very preferably between 0.1 mm and 0.8 mm, or consists entirely of a bonding agent ( 37 ), preferably in the range of strengths for thermoplastics. Winding method according to one of the preceding claims, characterized in that a connecting element ( 36 ) is applied, which has a weakened in its cross section and or perforated region or that a connecting element ( 36 ), that a weakening agent, preferably a tear thread, a tear strip, a layer or the like, having. Winding method according to one of the preceding claims, characterized in that the connecting element ( 36 ) in several, over the circumference of the partial web or finished rolls to be connected ( 7 ), distributed portions, or the connecting element ( 36 ) is applied in 1 to 20, preferably 1 to 8, more preferably 2 to 5 continuous wraps. Winding method according to one of the preceding claims, characterized in that the application of at least one connecting element ( 36 ) is based on collected measurement data. Winding method according to one of the preceding claims, characterized in that at least one connecting element ( 36 ) shortly before or when a critical natural frequency of the winding system ( 8th ) or at least one part ( 7 . 18 . 19 . 24 - 26 ) of the winding system ( 8th ) is applied. Winding method according to one of the preceding claims, characterized in that at least one connecting element ( 36 ) over the separation gap ( 30 ) of two adjacent partial web or finished rolls ( 7 ) is applied when the two partial web or finished rolls ( 7 ) during their training a certain difference in diameter, preferably of at least 0.5 mm, occasionally exceed of at least 1.0 mm and exceptionally of at least 2.0 mm. Winding method according to one of the preceding claims, characterized in that at least one connecting element ( 36 ) at a web speed (V) of greater than 800 meters per minute, preferably greater than 1200 meters per minute, more preferably greater than 1500 meters per minute. Winding method according to one of the preceding claims, characterized in that the longitudinal separation process comprises a plurality of temporally parallel and over the CD direction (Y) of the material web (M) distributed individual separation processes and, at least in terms of temporal overlap, only over part of the separation column ( 30 ) at least one connecting element ( 36 ) is applied. Slitter ( 1 ) which is an unwinding device ( 2 ) for a mother role ( 3 ), in which a material web (M), preferably a paper or board web, from a parent roll ( 3 ), a longitudinal parting line ( 4 ) in which the material web (M) in the longitudinal direction to form at least one separation gap ( 30 ) is separable into at least two partial webs (M ') and a take-up device ( 5 ) which has a winding bed ( 6 ) has in the at least two front side juxtapositionable finished rolls ( 7 ) by means of winding rollers ( 18 . 19 . 24 ) are bildbild and the forming Teilbahn- or finished rolls ( 7 ) and the winding rollers ( 18 . 19 . 24 ) Parts of a common winding system ( 8th ), characterized in that the slitter-winder ( 1 ) in the longitudinal direction (x) behind the longitudinal dividing part ( 4 ) An institution ( 31 ), by means of a connecting element ( 36 ) for bridging the at least one separation gap ( 30 ) between two adjacent partial webs (M ') or between two adjacent partial web or finished rolls ( 7 ) can be applied. Slitter ( 1 ) according to the preceding claim, characterized in that it comprises a separating device, by means of which at least one connecting element ( 36 ) related finished rolls ( 7 ) are separable from each other.

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