EP1818298A2 - Method and device for winding partial material webs on cores to partial material web rolls - Google Patents

Abstract

The method involves lying partial material web rolls against a common central roller (5) in two winding position groups (A,B), which are moved axially to each other on different positions (PA,PB). A conveyor strip is formed in an edge area of the partial material web with the help of separators (15,18), preferably a traverse separator, arranged before a new nip (N2) in a running direction of the partial material web. An initial separating piece is brought between a conveyor strip and a central roller with the help of a conveying device (19). An independent claim is also included for a device for winding of a partial material web on a roll core to partial material web rolls.

Description

The invention relates to a method for winding partial material webs on roll cores to partial web web rolls, which lie axially offset from one another at different circumferential positions on a common central roll in at least two winding position groups, in which the partial webs are cut upon reaching a predetermined diameter of the partial web web rolls and transferred to new roll cores, which are applied to the central roll in training new nips.

Furthermore, the invention relates to a device for winding partial material webs on roll cores to partial material web rolls axially offset from each other in at least two Wickelpositionsgruppen at different circumferential positions on a common central roll, in which the Teilmaterialbahnen be cut upon reaching a predetermined diameter of the Teilmaterialbahnrollen and transferred to new roll cores , which are applied to the central roll in training new nips.

The invention will be described below with reference to a paper web as an example of a material web in the embodiment of a partial material web. It is not limited to this. Similar problems also arise when cutting paper-like products, such as cardboard, or plastic or metal foils.

Paper webs are today often produced on paper machines whose working width is greater than that of the users, such as printers, desired width. For this reason, the paper webs must be cut in one of the last manufacturing steps to the appropriate width and then rolled up or wound up. This always results in at least two, but usually more Teilmaterialbahnrollen. For winding these partial material web rolls two different ways are known.

On the one hand, all partial web web rolls can be wound axially next to one another in a common winding bed, which is formed by two or more carrier rolls. This winding thus takes place after the support roller principle.

Another principle is the so-called backup roll principle in which the individual partial web rolls are held on their roll core. To set the winding hardness, which is determined inter alia by the contact pressure during winding, the partial material web rolls are applied to a pressure roller. If one uses this pressure roller for all partial material web rolls together, then one speaks of a central roll.

It is obvious that when the partial material web rolls are held at their end faces, a certain distance of the Teilmaterialbahnrollen in the axial direction is necessary. For this reason, several, usually two, winding position groups are provided, which are arranged on the central roller in different angular positions. The partial material web rolls of the different winding position groups are arranged in a gap to each other.

This winding principle has basically proven itself well. One of the remaining problems, however, arises when the individual partial web rolls have reached their desired diameter and one Therefore, the partial material webs of the finished wound Teilwerkbahnrolle on a new roll core wants to transfer or transfer. This case occurs relatively frequently, especially when the cut material web originates from a jumbo or mother roll, which takes up a substantially greater length of the material web than the length of the partial material webs on the partial material web rolls. The difficulty is that the path from the interface where the webs of material are cut is different in length up to a single winding position. One must therefore handle the individual partial material webs often individually, which is relatively complicated. Either one cuts off the partial material webs so that the first winding position group is reached. It is then necessary to slowly wind the partial material web rolls in the first winding position group until the remaining part material web has reached the second winding position group (and more). Only then can the winding process continue as usual. Or one carries all partial material webs up to the last winding position group (usually the second) and then has to cut the associated partial material webs of the first winding position group accordingly.

From the German Offenlegungsschrift DE 198 01 874 A1 a method and a device for winding partial webs to partial web rolls is known, wherein the partial web rolls in at least two winding position groups axially offset from one another at different circumferential positions on a common central roll. The partial material webs are cut upon reaching a predetermined diameter of the partial material web rolls and transferred to new roll cores. When winding according to this principle, the roll change during winding in different winding position groups should be simplified. For this purpose, the partial webs are cut in the contact region of the partial web rolls with the central roll and by a cutting device which extends axially over all winding positions and which is pivotable about all the winding position groups around the central roll. The disadvantage here is that the cutting device in the various Winding position groups must be pivoted in order to achieve a comparison with the prior art simplified role change. For this purpose, moreover, the gift device must be elaborately formed, with their positioning ultimately having a not insignificant influence on the quality of the roll change.

The invention has for its object to simplify the role change when winding part material webs on roll cores to Teilmaterialbahnrollen process reliability, in particular to reduce the time required for it noticeably.

This object is achieved in a method of the type mentioned fact that in at least one edge region of the partial material web at least one transfer strip by means of at least one arranged in front of the new nip in the direction of the Teilmaterialbahn separating device, preferably a cross-cutting device, is formed that at least one initial separating piece between the transfer strip and the central roll are introduced by means of at least one delivery device such that a portion of the introduced initial separator is not covered by the transfer strip, that the at least one initial separator after reaching a new nip formed by the central roll and the new roll core at least temporarily in the uncovered Area is connected to a guide roller leading to the new core and that at the latest at the expiration point of the material web of the new roll core separation of the part mat rialbahn caused by the at least one initial separating piece and / or made possible, whereby at least one new, bound to the Initialtrennstück and, the new roll core 3N guide head 28 bound Teilmaterialbahnanfang is formed.

By the targeted introduction of at least one initial separating piece between the at least one transfer strip and the winding roller, which after reaching the nip in the not covered by the transfer strip of the partial material web Area is associated with the new roll core leading guide head, and the defined separation of the transfer strip through the initial separator to form a new, bound to the initial separator and the new roll core Teilmaterialbahnanfangs the known disadvantages of the prior art are completely avoided.

In particular, the defined and safe formation of the at least one bound Teilmaterialbahnanfangs ensures an absolutely clean beginning of winding, which is one of the most important prerequisite for optimal winding structure and a small amount of waste. At the same time, with the process comprising only a few process steps, the highest reproducibility and associated reliability in the transfer of running partial material webs to new roll cores is achieved at extremely favorable investment and process costs.

In a first embodiment according to the invention, it is proposed that in each of the two edge regions of the partial material web a transfer strip is produced. By means of this embodiment, a shortened period of time for the transfer of the partial material web is achieved, whereby the inevitably accumulating scrap quantity is reduced. The symmetry given at the beginning of the roll also avoids a generally undesirable conical roller structure.

In a further embodiment of the invention, an initial separator is used, which is provided in the area not covered by the partial material web with means with which at the latest on reaching the new nip formed by the central roll and the new roll nips by the initial separator, an at least temporary, sufficiently strong Connection is made between the initial separator and the new roll core. With these agents according to the invention, for example, an adhesive, vulcanization, Velcro, Saugknopf-, form-fitting, Reibschluss- or welded joint or a magnetic or electrostatic connection made with the new roll core. All these funds have in common that they are characterized by a good cost-benefit ratio and, moreover, have above-average process reliability.

Furthermore, an initial separating piece is used, which has at least one adhesive area in the area covered by the partial material web in order to produce at least one temporary connection between the partial material web or between the new partial material web beginning and the initial separating piece.

In order not to obtain any appreciable increase in diameter, it is preferable to use an initial separator having a thickness in the range of 0.5 to 0.05 mm, preferably in the range of 0.25 to 0.1 mm. This thickness ensures that no marks are formed in the partial material web due to the initial separator.

Furthermore, a trained as a molding initial separator is used, which consists of a plastic, a metal, a textile material, a tear-resistant fiber, in particular paper, or at least one combination of materials. By this fitting, the handling of the initial separator is much easier, but without negatively affecting the transfer of the current partial material web to a new roll core.

Also, the initial separator may be formed as a preferably easily detachable part of a carrier.

Alternatively, the initial separator may be mounted on at least one carrier prior to insertion between the web of material and the central roll by means of a relatively easily releasable connection, wherein the at least one carrier after leaving the new nip is ideally neither with the new Teilmaterialbahnanfang still entrained with the new roll core.

In order for the at least one new partial material web beginning to be formed in a defined manner, the initial separating piece is provided with means for punching, cutting, perforating or embossing the partial material web, with which the partial material web is so weakened or even severed at the latest at the discharge point of the partial material web from the new roll core, so that at least one new partial material web start is formed, preferably defined.

In further preferred embodiment possibilities, the initial separating piece is introduced by means of at least one dispensing device essentially directly or indirectly between the partial material web and the central roll.

In the case of direct introduction, the initial separating piece can be introduced substantially directly into the new nip by means of at least one dispensing device in the case of a central roller which is not wrapped around by the partial material web. On the other hand, during indirect introduction, the initial separating piece can first be applied on the underside of the partial material web and then introduced by means of the partial material web between the partial material web and the central roll or it can first be applied temporarily to the lateral surface of the central roll and then by means of the central roll between the partial material web and the central roll be introduced.

All of these named placement locations and possibilities have the goal of transferring the running partial material web to a new roll core as quickly and reliably as possible.

In the aforementioned types of introduction, the temporary connection is preferably by means of at least one adhesive surface, by means of electrostatic forces, means magnetic forces, by means of vacuum application of the central roll, produced by means of Velcro or by means of at least one Saugknopfkoppelung.

Advantageously, the width of the transferred to the new roll core Teilmaterialbahnanfangs is preferably increased by means of a second separator such that the entire partial material web is transferred to the new roll core. In this case, the second separating device is moved relative to the partial material web in a plane approximately parallel to the partial material web, preferably at least substantially perpendicular to the running direction of the partial material web, so that oblique dividing lines are produced. By means of these embodiments, a shortened time period for the transfer of a running partial material web is achieved on a new roll core, whereby the inevitably accumulating scrap amount is reduced. Due to the given at the beginning of winding symmetry and a generally undesirable conical winding structure is avoided.

Taking process-related aspects into consideration, the initial separation piece forms the last device and / or the last element-viewed in the direction of travel of the partial material web-for separating and / or transferring the partial material web onto a new roll core.

Further, upon attaining a respective predetermined diameter of the partial material web rolls, the partial material webs are preferably cut individually and transferred to the respective new core cores or they are successively cut, preferably from the drive side to the non-drive side or from the non-drive side to the drive side, and transferred to the respective new cores or they will be cut in groups, preferably within the winding position group, and transferred to the respective new roll cores, or they will be cut simultaneously and transferred to the respective new roll cores. The use of these options depends fundamentally on the respective application, However, they all have in common that they are characterized by a good cost-benefit ratio and, moreover, have above-average process reliability.

The object of the invention is achieved in a device of the type mentioned in that at least one separating device, preferably a cross-cutting device is arranged in front of the new nip in the direction of the partial material web to form at least one transfer strip and that at least one dispenser for introducing the at least one initial separator between the at least one transfer strip and the central roll is arranged such that the at least one initial separating piece is substantially directly or indirectly between the transfer strip and, leading to the new roll core guide head can be introduced.

In this case, the advantages already stated for the method according to the invention are achieved.

Further preferred embodiments of the device according to the invention are specified in the subclaims.

Further features and advantages of the invention will become apparent from the dependent claims and the following description of preferred embodiments with reference to the drawings.

Figur 1

eine schematisierte Seitenansicht einer erfindungsgemäßen Vorrichtung;

Figur 2

eine ausschnittsweise Draufsicht auf die erfindungsgemäße Vorrichtung der Figur 1;

Figuren 3 bis 7:

schematisierte und perspektivische Teildarstellungen einer weiteren Ausführungsform einer erfindungsgemäßen Vorrichtung;

Figur 8:

eine schematisierte Draufsicht auf eine Ausführungsform einer erfindungsgemäßen Vorrichtung;

Figur 9:

eine schematisierte und perspektivische Teildarstellung einer weiteren Ausführungsform einer erfindungsgemäßen Vorrichtung; und

Figuren 10 bis 12:

schematisierte und perspektivische Darstellungen von möglichen Ausführungsformen eines erfindungsgemäßen Initialtrennstücks.

Show it

FIG. 1

a schematic side view of a device according to the invention;

FIG. 2

a fragmentary plan view of the inventive device of Figure 1;

FIGS. 3 to 7:

schematic and perspective partial views of another embodiment of a device according to the invention;

FIG. 8:

a schematic plan view of an embodiment of a device according to the invention;

FIG. 9:

a schematic and perspective partial view of another embodiment of a device according to the invention; and

FIGS. 10 to 12:

schematic and perspective views of possible embodiments of an initial separating piece according to the invention.

• Eine Trenneinrichtung ist eine Einrichtung, die mindestens ein Schneidelement aufweist, mit dem mindestens eine Trennung oder mindestens eine Schwächung einer Teilmaterialbahn erzeugbar ist;
• eine Trenneinrichtung, insbesondere ein Quertrenneinrichtung, ist eine Einrichtung, die mindestens ein Schneidelement aufweist, mit dem mindestens eine, in ihrer Position vorzugsweise quer zur Laufrichtung einer Teilmaterialbahn gesehen, veränderbare Trennung oder Schwächung der Teilmaterialbahn erzeugbar ist;
• ein Nip ist ein Bereich einer Zentralwalze, in welchem diese einen Einfluss auf eine Teilmaterialbahnrolle oder einen neuen Rollenkern ausüben kann;
• ein neuer Nip zwischen der Zentralwalze und dem neuen Rollenkern ist im Sinne der vorliegenden Erfindung auch dann gegeben, wenn diese einen zum Herstellen einer Verbindung zwischen einem Initialtrennstück und dem neuen Rollenkern geeigneten Spalt bilden; und
• eine Initialumdrehung ist die erste Vollumdrehung eines neuen Rollenkerns nach einer erfolgten Verbindung zwischen einem Initialtrennstück und einem neuen Rollenkern.

Some terms used in the following description are defined as follows:

• A separating device is a device which has at least one cutting element with which at least one separation or at least one weakening of a partial material web can be generated;
• a separating device, in particular a cross-cutting device, is a device which has at least one cutting element with which at least one changeable separation or weakening of the partial material web, seen in its position preferably transversely to the running direction of a partial material web, can be produced;
• a nip is an area of a center roll in which it can exert an influence on a partial material web roll or roll core;
• a new nip between the central roll and the new roll core is given in the context of the present invention even if this one form a suitable gap for establishing a connection between an initial separator and the new roll core; and
• An initial rotation is the first full revolution of a new core after a connection has been made between an initial part and a new core.

FIG. 1 shows a schematic side view of a device 1 for winding partial material webs 2 on roll cores 3 to partial material web rolls 4, resting against a common central roll 5.

The device 1 is preceded by a roller cutting device 6 in the running direction L (arrow) of the partial material webs 2. It has a feed section 7 in which a usually machine-width material web 8, for example a paper or board web unwound from a jumbo or mother roll, is fed. The material web 8 then passes through a cutting section 9, in which it is divided by known per se, such as cutting blades 10, 11, into a plurality of partial material webs 2. The cutting blades 10, 11 cut the subsequently guided over a further roller 12 web 8 in this case in the longitudinal direction. For this purpose, a certain tensile force is required, which is applied via the central roller 5. The partial material web rolls 4 formed on the roll cores 3 are pressed so strongly against the surface of the central roll 5 when a respective nip N1 is formed, that the resulting frictional engagement is sufficient to transmit the tensile force necessary for cutting the material web 8 into partial material webs 2.

The partial material webs 2 are now wound up to partial web web rolls 4. Partial material web rolls 4A, 4B of adjacent partial material webs 2 are in this case arranged axially offset from one another in two winding position groups A, B at two different circumferential positions PA, PB. In each winding position group A, B, the individual partial material webs 2 have a certain axial distance from each other, but may otherwise have the same or approximately the same winding axis 13, 14. The Teilmaterialbahnrollen 4 of the two winding position groups A, B are arranged to each other on the gap.

While the partial material webs 2, which are wound up in the circumferential position PA, wrap around the central roller 5 by about 60 °, the partial material webs 2, which are wound in the circumferential position PB, are guided about the central roller 5 over about 240 °.

The partial material web rolls 4 are wound onto driven roll cores 3, for example by retracted guide heads 18, which in turn have a drive. This is indicated only schematically in FIG.

Now has a Teilmaterialbahnrolle 4 reaches a predetermined diameter D, a new, only for the winding position group 4A shown roll core 3N is preferably pre-accelerated by means of a drive device, not shown, and brought into contact with the central roller 5 to form a new Nips N2. Thereafter, the partial material web 2 is cut to transfer it to the new roll core 3N.

It is provided that in at least one edge region R of the partial material web 2 at least one transfer strip 21 by means of at least one in front of the new nip N2 in the direction L (arrow) of the partial material web 2 arranged separating device 15, preferably a cross-cutting device 18, is formed that at least one initial separator 16 is inserted between the transfer strip 21 and the central roller 5 by means of at least one dispenser 19 such that a portion 16.A of the introduced initial separator 16 is not covered by the transfer strip 21, that the at least one initial separator 16 after reaching one of the central roller 5 and of the new roll core 3N formed new nips N2 at least temporarily in the uncovered area 16.A is connected to the new roll core 3N leading guide head 28 and that at the latest at the expiration point AP of the partial material web 2 of the new roll core 3N a separation 20 of the partial material web 2 caused by the at least one initial separator piece 16 and / or allowing at least one new partial material web beginning 17 bound to the initial separating piece 16 and the new roll core 3N to be formed.

In the embodiment of FIG. 1, the separating device 15, 18 is arranged on the upper side of the partial material web 2. By contrast, the dispensing device 19 is arranged such that the initial separating piece 16 is first applied on the underside of the partial material web 2 and then by means of the partial material web 2 between the partial material web 2 and the central roller 5 can be introduced. The dispenser 19 has, for example, the shape and function of a paper magazine of a plotter or a printer with multi or single sheet delivery.

FIG. 2 now shows a partial plan view of the apparatus 1 shown schematically in FIG. 1 for winding partial material webs 2 on roll cores 3 to partial material web rolls 4, resting against a common central roll 5. The roll cores 3 are driven by retracted guide heads 18, which in turn have a drive. Such guide heads 18 are well known to those skilled in the art from a variety of practical applications and references.

It can be seen that the partial material web rolls 4A, 4B of adjacent partial material webs 2 are arranged axially offset from one another in two winding position groups A, B at two different circumferential positions PA, PB. In each winding position group A, B, the individual partial material webs 2 have a certain axial distance from each other, but otherwise may have the same or approximately the same winding axis 13, 14.

The Teilmaterialbahnrollen 4 of the two winding position groups A, B are arranged to each other on the gap.

The partial material webs 2 can now be individually cut upon reaching a respective predetermined diameter D of the partial material web rolls 4 and transferred to the respective new core cores 3. However, they can also be cut in succession, preferably from the drive side to the non-drive side or from the non-drive side to the drive side, in particular when a respective predetermined diameter D of the partial material web rolls 4 is reached and transferred to the respective new roll cores 3. In addition, however, they can also be cut in groups, preferably within the winding position group A, B, on reaching a respective predetermined diameter D of the partial material web rolls 4 and transferred to the respective new roll cores 3. Or, in particular, when a respective predetermined diameter D of the partial material web rolls 4 is reached, they can be cut simultaneously and transferred to the respective new roll cores 3. Which method of transferring the individual partial material webs 2 is now used depends primarily on the intended use. In particular, transfer times, cycle times, spatial conditions, acquisition costs, operating costs and the like play a not insignificant role.

FIGS. 3 to 7 show schematized and perspective partial representations of a device 1 according to a first embodiment of the invention, the constructional structure including control engineering in principle corresponding to that of the device 1 of FIG. 1, with reference being made to FIG.

It should be noted that FIGS. 3 to 7 are merely partial representations of a device 1. Continuously, only one formed on a roll core 3 by a tapered partial material web 2 is always Partial material web roll 4 is shown, which forms a nip N1 with the central roller 5 shown in detail.

Now, as shown in Figure 3, the Teilmaterialbahnrolle 4 has reached a predetermined diameter D, a new roll core 3N is preferably pre-accelerated by means of a retracted guide head 18 and brought into contact with the central roll 2 to form a new Nips N2. Thereafter, at least one separation 20 in at least one edge region R by means of at least one known separating device 18 is usually mounted in the running partial material web 2 before or on the central roller 5, whereby at least one transfer strip 21 is formed. To transfer the entire partial material web 2 onto the new roll core 3N, the transfer strip 21 is severed and transferred to the guide head 28 leading to the new roll core 3N.

According to the invention, it is now provided that, as shown in FIG. 4, an initial separating piece 16 is inserted between the partial material web 2, preferably in the form of the transfer strip 21, and the central roll 5 such that an area 16.A of the inserted initial separating piece 16 does not touch the partial material web 2, preferably the transfer strip 21 of the partial material web 2, is covered. The area preferably covered by the transfer strip 21 is denoted by reference numeral 16.B.

In the further course of the process, the new nip N2 formed by the central roll 5 and the new roll core 3N is reached by the initial separating piece 16 in which the initial separating piece 16 is connected in its region 16.A to the guide head 28 leading to the new roll core 3N As a connection, in addition to the adhesive connection, a Velcro, form-fitting, welding or other connection can be applied.

As already stated, at least one transfer strip 21 may have been formed in the partial material web 2. However, this formation of a transfer strip 21, preferably produced by means of at least one separating device 18, is not necessary according to the invention for carrying out the method according to the invention. This situation also applies to the description of the other figures.

FIG. 5 illustrates that the possibilities for configuring such a connection are not limited to only the area 16.A of the initial separating piece 16, but also that the guiding head 18 can be configured optimally in accordance with the type of connection. As an example, a fitted with plastic-bonded permanent magnet peripheral area 22 can be seen, which is necessary for a connection by means of magnetic forces.

Also in the area of the new nip N2, which is identical in the examples illustrated in FIGS. 3 to 7 with the discharge point AP of the partial material web 2 (cf. FIG. 9), the transfer strip 21 now enclosed between the new roll core 3N and the initial separating piece 16 the initial separating piece 16 is severed, which leads to the formation of a "new Teilmaterialbahnanfangs", wherein the term "new Teilmaterialbahnanfang" essentially completely separated and bound to the guide head 18 and the initial separator piece 16 transfer strip 21 is designated.

In FIG. 6, the new partial material web beginning 17, which has been definedly transferred via the guide head 18 to the new roller core 3N, is explicitly shown during the initial rotation. In addition, it can be seen from FIG. 6 how the width of the transferred partial material web beginning 17 is increased by means of the separating device 18.

FIG. 7 shows an advanced state of the process in which the traveling partial material web 2 has been cut almost completely by means of the separating device 18 and has been transferred to the appropriate extent to the new core 3N.

FIG. 8 shows a schematized plan view of a device 1 according to an embodiment of the invention.

Regardless of whether the initial separating piece 16 is introduced directly or indirectly by means of a dispensing device, not shown, between the transfer strip 21 and the central roller 5, a region 16.A of the initial separating piece 16 should not be covered by the transfer strip 21. While this area 16.A is important for a connection between the initial separator 16 and the new roll core 3N guided by the guide head 18, the area 16.B of the initial separator 16 covered by the transfer strip 21 becomes primarily for separating the transfer strip 21 under formation a new Teilmaterialbahnanfang 17 used. For this purpose, the initial separator 16 may be provided with at least one suitable release agent and / or a release contour 23.

FIG. 9 shows a schematized and perspective view of a device 1 according to a second embodiment of the invention.

According to the invention, it is now provided that two separations 20.1, 20.2 are provided in both edge regions R1, R2 of the partial material web 2 by means of a known separating device 18.1, 18.2, in particular a cross-cutting device, whereby two transfer strips 21.1, 21.2 are formed, that per transfer strip an initial separating piece 16.1 , 16.2 between the transfer strips 21.1, 21.2 and the central roller 5 is introduced directly or indirectly by means of a respective delivery device, not shown, such that a region 16.A1, 16.A2 of each introduced initial separator piece 16.1, 16.2 of the transfer strip 21.1, 21.2 of the partial material web 2 is not covered, that the initial separating pieces 16.1, 16.2 after reaching the new nip N2 with the new roll core 3N leading guide head 28 are connected, that at the latest at the expiration point AP of the material web 2 of the new roll core 3N the Überführstreifen 21.1, 21.2 are severed by the respective initial separating pieces 16.1, 16.2, whereby each initial separating piece 16.1, 16.2 a new, bound to the corresponding Initialtrennstück 16.1, 16.2 and the new roll core 3N Teilmaterialbahnanfang 17.1, 17.2 is formed and that the width of each of the new roll core 3N transferred Teilmaterialbahnanfang 17.1, 17.2 by means of the separator 18.1, 18.2 in a known manner is increased such that the entire partial material web 2 is transferred to the new roll core 3N.

FIGS. 10 to 12 show three schematic and perspective illustrations of possible embodiments of the initial separating piece 16 according to the invention.

FIG. 10 shows an exemplary first embodiment of the initial separating piece 16 according to the invention.

In essence, the initial separator 16, the thickness of which is denoted by the reference numeral d, is formed as a molding of a plastic, a metal, a textile material or a pulp. After making the connection between the initial separator 16 and the new roll core essential steps, the initial separator 16 for this connection is provided with means 24, which means 24 may extend over one, several or all of the initial separator 16. Alone with adhesives there is a virtually unlimited range of agents available to make such a connection. In terms of reuse of the roll cores, especially with removable adhesives, similar to Tesa Powerstrip Beiersdorf, achieved very good results. Also, the use of hot-melts, which have neutral adhesive properties at ambient temperature and become connectable only after reaching a certain temperature, is very interesting not only in terms of automated handling and feeding the initial separators to the dispenser. Thus, for example, a hot-melt laminated initial separator 16, similar to the single-sheet feeder of a commercial printer, fed easily and reliably from a supply cassette of the actual dispenser and the desired adhesive properties are activated by heat at a later date. In this way, in the case of a suitable, reactive hot-melt, only a temporary connection between the initial separating piece 16 and the new roll core, at least for the duration of one initial rotation, can be established. Comparable benefits can be achieved through the use of encapsulated adhesives that are activated only by applying a certain pressure. The enumeration of all possible types of connection with a detailed description of the resulting advantages is not critical to this invention and would certainly go beyond the scope of this document. For this reason, it should be pointed out only in general terms that this connection can also be designed as a form-locking connection, in particular a Velcro connection, as a welded connection, in particular a thermal welding connection, or as a magnetic connection, so that the initial separating piece 16 is connected to the new roll core and can fulfill his duties.

The task of the initial separating piece 16 is inter alia in the separation of the transfer strip and can be carried out in a variety of different partial material webs by means of an edge formed as a separating contour 23 edge 25. A new Teilmaterialbahnanfang bound to the initial separator 16 and the new roll core can be formed by the between the new roll core and the initial separator 16 trapped transfer strip is separated by the Initialtrennstück 16 substantially completely by tearing along the separating contour 23. In order to make the tearing progressively and thus reliable, the corresponding edge 25 can be formed under an angle which is matched to the tearing behavior of the partial material web. Due to the process, the new partial material web beginning between the new roll core and the initial separating piece 16 is included and thus already bound to this. To improve the binding of the new Teilmaterialbahnanfangs to the Initialtrennstück 16 this can be additionally provided with, for example, an adhesive region 26, which can also be used for indirect introduction of the Initialtrennstücks 16 between the transfer strip and the central roll by means of a dispenser. On its rear side, the initial separating piece 16 can also be provided with suitable means, not shown here, with which a temporary connection between the initial separating piece 16 and the central roll is produced when the initial separating piece 16 is indirectly introduced by means of a dispenser between the transfer strip and the central roll. Furthermore, FIG. 10 shows the area 16.A not covered by the transfer strip and the area 16.B of the initial separating piece 16 covered by the transfer strip, whereby a clear association with the other figures is to be achieved.

FIG. 11 shows a further embodiment of the initial separating piece 16 according to the invention.

Many disadvantages of the prior art are avoided by forming the initial separator 16 from an extremely thin material. According to the invention, it is provided that the initial separating piece 16 is mounted on at least one carrier 27 by means of a relatively easily releasable connection prior to introduction between the transfer strips, not shown, and the central roller, which after formation of a new, to the initial separator 16 and the new roll core bound Teilmaterialbahnanfangs, is not carried along with the new roll core. The advantage of an initial separating piece 16 designed as a composite object is the almost unlimited design freedom of its physical and mechanical properties. Thus, for example, the material thickness can now be reduced without regard to the rigidity of the initial separating piece associated with it, since the rigidity required for process reasons can be achieved by the carrier 27. In addition, the carrier 27 can be formed so that the introduction of the initial separator 16 between the transfer strip and the central roller by means of a dispenser can be automated and performed absolutely reliable.

FIG. 12 shows a further advantage of an initial separating piece 16 designed as a composite object.

For some applications, in particular for transferring partial material webs with high tear strength, the initial separator 16 can be configured according to the invention with means 24.1 for separating the transfer strip, with which the new Teilmaterialbahnanfang by punching, cutting, pressing or embossing or by a combination thereof, with the aid of in the new nip ruling forces or by at least one additionally arranged in front of the new nip, not shown auxiliary device, is formed. When transferring partial material webs which have a defined melting point behavior (plastic web), the heat for separating the transfer strip can also be applied by configuring the initial separating piece 16 with an electrical resistance wire as means 24.1 for separating. The energy required for heat generation can be transmitted contactlessly, for example, by inductive means, preferably immediately before the new nip, by means of a known device, not shown here. FIG. 12 also shows that the relatively easily detachable connection between the initial separating piece and the carrier 27 can be released, for example, as soon as a new, bound to the Initialtrennstück 16 and the new roll core Teilmaterialbahnanfang is formed, whereby the carrier 27 is deliberately not carried along with the new roll core.

In summary, it should be noted that the invention provides a method and an apparatus of the type mentioned, which simplify the role change when winding part material webs on roll cores to partial material web rolls process reliable and thereby shorten the time required for notable noticeable.

LIST OF REFERENCE NUMBERS

1

contraption

2

Part web

3

roll core

3N

New roll core

4

Part web roll

4A

Part web roll

4B

Part web roll

5

central roll

6

Slitter

7

feeding

8th

web

9

cutting section

10

Cutting knife (middle)

11

Cutting knife (middle)

12

roller

13

winding axis

14

winding axis

15

separator

16

Initial cutting piece

16.1

Initial cutting piece

16.2

Initial cutting piece

16.A

Uncovered area

16.A1

Uncovered area

16.A2

Uncovered area

16.B

Covered area

17

Part material web start

17.1

Part material web start

17.2

Part material web start

18

separator

18.1

First separator

18.2

Second separator

19

delivery device

20

separation

20.1

separation

20.2

separation

21

Transfer strip

21.1

Transfer strip

21.2

Transfer strip

22

Area

23

separating contour

24

medium

24.1

medium

25

edge

26

Adhesive area

27

carrier

28

guide head

A

Winding position group

AP

the end point

B

Winding position group

D

diameter

d

thickness

L

Running direction (arrow)

N1

Nip (central roll - partial material web roll)

N2

New nip (central roll - new roll core)

PA

circumferential position

PB

circumferential position

R

border area

R1

border area

R2

border area

Claims (48)

Method for winding partial material webs (2) onto roll cores (3) to partial material web rolls (4, 4A, 4B) which are axially offset from one another in at least two winding position groups (A, B) at different circumferential positions (PA, PB) at a common central roll (5 ), in which the partial material webs (2) are cut upon reaching a predetermined diameter (D) of the partial material web rolls (4, 4A, 4B) and transferred to new roll cores (3N) which are attached to the central roll (5) when new nips are formed ( N2) are created,
characterized,
in that at least one transfer strip (21, 21.1, 21.2) is arranged in at least one edge region (R, R1, R2) of the partial material web (2) by means of at least one separating device (in front of the new nip (N2) in the running direction (L) of the partial material web (2). 15, 18, 18.1, 18.2), preferably a cross-cutting device, is formed,
in that at least one initial separating piece (16, 16.1, 16.2) is introduced between the transfer strips (21, 21.1, 21.2) and the central roll (5) by means of at least one delivery device (19) such that a region (16.A, 16.A1, 16.A2) of the introduced initial separating piece (16, 16.1, 16.2) is not covered by the transfer strip (21, 21.1, 21.2),
in that the at least one initial separating piece (16, 16.1, 16.2), after reaching a new nip (N2) formed by the central roll (5) and the new roll core (3N), at least temporarily in the uncovered one Area (16.A, 16.A1, 16.A2) with a new roll core (3N) leading guide head (28) is connected and
causes the latest at the point (AP) of the partial material web (2) of the new roll core (3N) is a separation (20, 20.1, 20.2) of the partial material web (2) through the at least one initial cutting piece (16, 16.1, 16.2) and / or allows is formed, whereby at least one new, to the initial part (16, 16.1, 16.2) and, the new roll core (3N) leading guide head (28) bound Teilmaterialbahnanfang (17, 17.1, 17.2) is formed. Method according to claim 1,
characterized,
in that a transfer strip (21.1, 21.2) is produced in each of the two edge regions (R1, R2) of the partial material web (2). Method according to claim 1 or 2,
characterized,
in that an initial separating piece (16, 16.1, 16.2) is used which is provided with means (24, 24.1) in the region (16.A, 16.A1, 16.A2) not covered by the partial material web (2), by means of which at the latest on reaching the new nip (N2) formed by the central roller (5) and the new roller core (3N) by the initial separating piece (16, 16.1, 16.2), an at least temporary, sufficiently firm connection between the initial separating piece (16, 16.1, 16.2 ) and the guide roller (28) guiding the new roller core (3N). Method according to claim 3,
characterized,
that with these means (24, 24.1) an adhesive, vulcanization, Velcro, Saugknopf-, form-fitting, Reibschluss- or Welded connection or a magnetic or electrostatic connection with the new roll core (3N) is produced. Method according to one of the preceding claims,
characterized,
in that an initial separating piece (16, 16.1, 16.2) is used, which has at least one adhesive area (26) in the region (16.B) covered by the partial material web (2) in order to provide at least one temporary connection between the partial material web (2) between the new Teilmaterialbahnanfang (17, 17.1, 17.2) and the Initialtrennstück (16, 16.1, 16.2) produce. Method according to one of the preceding claims,
characterized,
in that an initial separating piece (16, 16.1, 16.2) having a thickness (d) in the range from 0.5 to 0.05 mm, preferably in the range from 0.25 to 0.1 mm, is used. Method according to one of the preceding claims,
characterized,
in that an initial separating piece (16, 16.1, 16.2) designed as a shaped piece is used, which consists of a plastic, a metal, a textile material, a tear-resistant fibrous material, in particular paper, or at least one material combination. Method according to one of the preceding claims,
characterized,
that the initial cutting piece (16, 16.1, 16.2) is formed as a preferably easily detachable part of a carrier (27). Method according to one of claims 1 to 7,
characterized,
in that the initial separating piece (16, 16.1, 16.2) is placed on at least one carrier (27) by means of a connection which is relatively easily detachable prior to introduction between the partial material web (2) and the central roll (5). Method according to claim 8 or 9,
characterized,
that the at least one carrier (27) after leaving the new nip (N2) is carried along neither with the new partial material web beginning (17, 17.1, 17.2) nor with the new roll core (3N). Method according to one of the preceding claims,
characterized,
in that the initial separating piece (16, 16.1, 16.2) is provided with means (24, 24.1) for punching, cutting, perforating or embossing the partial material web (2) with which at the latest at the discharge point (AP) of the partial material web (2) of the new roll core (3N) the partial material web (2) is so weakened or even severed, so that at least one new partial material web beginning (17, 17.1, 17.2) is preferably defined. Method according to one of the preceding claims,
characterized,
that the initial cutting piece (16, 16.1, 16.2) is substantially directly between the partial material web (2) and the central roll (5) is introduced by means of at least one dispensing device (19). Method according to claim 12,
characterized,
in that the initial separating piece (16, 16.1, 16.2) in the case of a central roller (5), which is not wrapped around by the partial material web (2), by means of at least one Dispensing device (19) is introduced substantially directly into the new nip (N2). Method according to one of claims 1 to 11,
characterized,
that the initial cutting piece (16, 16.1, 16.2) is introduced via at least one dispensing device (19) indirectly between the partial material web (2) and the central roll (5). Method according to claim 14,
characterized,
in that the initial separating piece (16, 16.1, 16.2) is first applied on the underside of the partial material web (2) and then introduced by means of the partial material web (2) between the partial material web (2) and the central roll (5). Method according to claim 14,
characterized,
that the initial separating piece (16, 16.1, 16.2) is first applied to the lateral surface of the central roll (5) with temporary connection and then introduced by means of the central roll (5) between the partial material web (2) and the central roll (5). Method according to claim 16,
characterized,
in that the temporary connection is produced by means of at least one adhesive surface, by means of electrostatic forces, by means of magnetic forces, by means of vacuum application of the central roller (5), by means of Velcro or by means of at least one suction button coupling. Method according to one of the preceding claims,
characterized,
in that the initial separating piece (16, 16.1, 16.2) shows the last device and / or the last element - seen in the running direction (L) of the partial material web (2) - for separating and / or transferring the transfer strip (21, 21.1, 21.2) a new roll core (3N) is formed. Method according to one of the preceding claims,
characterized,
in that the width of the at least one partial material web beginning (17, 17.1, 17.2) transferred to the new roll core (3N) is preferably increased by means of the separating device (15, 18, 18.2) such that the entire partial material web (2) rests on the new roll core (3N ) is transferred. Method according to one of the preceding claims,
characterized,
that the partial material webs (2) on reaching a respective predetermined diameter (D) of the partial material web rolls (4, 4A, 4B) and individually cut on the respective new roll cores (3N) are transferred. Method according to one of claims 1 to 19,
characterized,
in that the partial material webs (2) are cut in succession, preferably from the drive side to the non-drive side or from the non-drive side to the drive side, upon reaching a respective predetermined diameter (D) of the partial material web rolls (4, 4A, 4B). 3N). Method according to one of claims 1 to 19,
characterized,
in that, when a respective predetermined diameter (D) of the partial material web rolls (4, 4A, 4B) is reached, the partial material webs (4) are cut in groups, preferably within the winding position group (A, B), and transferred to the respective new roll cores (3N). Method according to one of claims 1 to 19,
characterized,
that the partial material webs (2), in particular on reaching a respective predetermined diameter (D) of the partial material web rolls (4, 4A, 4B) are simultaneously cut and the respective new roll cores (3N) are transferred. Device (1) for winding partial material webs (2) on roll cores (3) to partial material web rolls (4, 4A, 4B) axially offset from one another in at least two winding position groups (A, B) at different circumferential positions (PA, PB) Abut against the central roller (5), in which the partial material webs (2) are cut upon reaching a predetermined diameter (D) of the Teilmaterialbahnrollen (4, 4A, 4B) and transferred to new roll cores (3N), the central roller (5) in training new nips (N2) are applied, in particular for carrying out a method according to at least one of the preceding claims,
characterized,
in that at least one separating device (15, 18, 18.1, 18.2), preferably a transverse cutting device, is arranged in front of the new nip (N2) in the running direction (L) of the partial material web (2) for forming at least one transfer strip (21, 21.1, 21.2) and
in that at least one dispensing device (19) for introducing the at least one initial separating piece (16, 16.1, 16.2) is arranged between the at least one transfer strip (21, 21.1, 21.2) and the central roller (5) such that the at least one initial separating piece (16, 16.1, 16.2) 16.1, 16.2) substantially directly or indirectly between the transfer strips (21, 21.1, 21.2) and, the new roll core (3N) leading guide head (28) can be introduced. Device (1) according to claim 24,
characterized,
in that the at least one dispensing device (19) is arranged such that the at least one initial separating piece (16, 16.1, 16.2) is first applied on the underside of the partial material web (2) and then by means of the partial material web (2) between the partial material web (2) and the Central roller (5) can be introduced. Device (1) according to claim 24,
characterized,
that the at least one delivery device (19) is arranged such that the at least one initial cutting piece (16, 16.1, 16.2) at first onto the outer surface of the center roll during temporary connection (5) is applied and thereafter by means of the central roll (5) (between the partial material web 2) and the central roller (5) can be introduced. Device (1) according to one of claims 24 to 26,
characterized,
in that at the latest at the expiration point (AP) of the partial material web (2) of the new roll core (3N) of the transfer strips (21, 21.1, 21.2) through the initial separating piece dispensing device (19) for introducing at least one initial separating piece (16, 16.1, 16.2) between the at least a transfer strip (21, 21.1, 21.2) and the central roller (5) is arranged. Device (1) according to claim 27,
characterized,
that at the latest at the expiration point (AP) of the partial material web (2) of the new roll core (3N) of the transfer strip along one of the initial separating piece (16, 16.1, 16.2) predetermined separation contour (23 is substantially completely separated. Device (1) according to one of claims 24 to 28,
characterized,
in that the initial separating piece (16, 16.1, 16.2) has at least one adhesive area (26) in the area (16.A, 16.A1, 16.A2) not covered by the transfer strip. Device (1) according to one of claims 24 to 29,
characterized,
in that the initial separating piece (16, 16.1, 16.2) has at least one adhesive area (26) in the area (16.B) covered by the transfer strip. Device (1) according to one of claims 24 to 30,
characterized,
that the initial cutting piece (16, 16.1, 16.2) in the region covered by the transfer strip region (23, 16.B) at least one separation contour (23). Device (1) according to claim 31,
characterized,
that the separating contour (23) is formed neither in the running direction (L) nor transversely to the running direction (L) of the partial material web (2). Device (1) according to one of claims 24 to 32,
characterized,
in that the initial separating piece (16, 16.1, 16.2) has a thickness (d) in the range from 0.5 to 0.05 mm, preferably in the range from 0.25 to 0.1 mm. Device (1) according to one of claims 24 to 33,
characterized,
that the initial cutting piece (16, 16.1, 16.2) is formed as a molding of a plastic, a metal, a textile material, a tear-resistant fibrous material, in particular paper, or of at least one material combination. Device (1) according to one of claims 24 to 34,
characterized,
in that the initial separating piece (16, 16.1, 16.2) is formed as part of a carrier (27). Device (1) according to one of claims 24 to 35,
characterized,
in that the initial separating piece (16, 16.1, 16.2) is mounted on at least one carrier (27) by means of a connection which is relatively easily detachable prior to introduction between the transfer strips (21, 21.1, 21.2) and the central roller (5). Device (1) according to one of claims 24 to 36,
characterized,
that the separating means (15, 18, 18.1, 18.2) is arranged in the region of the central roll (5). Device (1) according to one of claims 24 to 37,
characterized,
that the separating means (15, 18, 18.1, 18.2) in the running direction (L) of the partial material web (2) before the central roll (5) is arranged in the region of a free running path. Device (1) according to one of claims 24 to 38,
characterized,
that the separating means (15, 18, 18.1, 18.2) in the running direction (L) of the partial material web (2) is arranged in a region touched in which the partial material web (2) at least one of the central roll (5) upstream rollers. Device (1) according to one of claims 24 to 39,
characterized,
that the separating means (15, 18, 18.1, 18.2) is arranged on the upper side of the partial material web (2). Device (1) according to one of claims 24 to 39,
characterized,
that the separating means (15, 18, 18.1, 18.2) is arranged on the underside of the partial material web (2). Device (1) according to one of claims 24 to 41,
characterized,
in that a cutting element with a respective beam of high energy density, in particular a water-jet or laser-beam cutting element, is provided as the separating device (15, 18, 18.1, 18.2). Device (1) according to one of the preceding claims 24 to 42,
characterized,
that only one separating device (15, 18) is provided, and
that this separating device (15, 18) in the edge region (R) to the formation of a transfer strip (21, 21.1, 21.2) at a distance from this is attachable. Device (1) according to claim 43,
characterized,
that the separating device (15, 18), preferably to the opposite web edge can be moved. Device (1) according to one of claims 24 to 44,
characterized,
in that two separating devices (18.1, 18.2) are provided which, in the region of the two edge regions (R1, R2), can be attached at a distance from the respective web edge in order to form a respective transfer strip (21.1, 21.2). Device (1) according to claim 45,
characterized,
that the two separating devices (18.1, 18.2) are preferably movable to the middle of the web. Device (1) according to one of Claims 24 to 46,
characterized,
that the initial separating piece (16, 16.1, 16.2) the last device and / or the last element - seen in the direction (L) of the partial material web (2) - for separating and / or transferring the transfer strip (21, 21.1, 21.2) on the new roll core (3N) forms. Device (1) according to one of claims 24 to 47,
characterized,
in that a plurality of separating devices (18, 18.1, 18.2), preferably cross-cutting devices, are provided in front of the new nips (N2) in the running direction (L) of the partial material webs (2) for forming at least one transfer strip (21, 21.1, 21.2) in the respective partial material web (2). are arranged and
a plurality of delivery devices (19) for introducing at least one initial separating piece (16, 16.1, 16.2) between the at least one Transfer strip of the respective partial material web (2) and the central roller (5) are arranged.

Images