DE10201410A1 - Method for forming reels of paper comprises severing web when reel change is required using cutter immediately in front of nip which incorporates system for holding cut edge against new core, e.g. adhesive - Google Patents

Abstract

The method for forming reels of paper or cardboard comprises severing the web (3) when a reel change is required using a cutter (7) immediately in front of nip with cutting or perforating blades (11). This also incorporates a system for holding the cut edge against the new core (6), e.g. adhesive, hook-pile fasteners, suction cups or electrostatic or magnetic systems. An Independent claim is included for a machine for use in the method.

Description

The invention relates to a method for transferring a preferably over a portion of a winding roll running web, in particular one Paper or cardboard web, on a new winding core.

The invention also relates to a winding machine for carrying out a such procedure.

Such methods for transferring a material web are, for example, in Area of a retractor of a machine for paper or Carton making, a coater, a slitter or one equivalent machine applied to the web without interrupting the Manufacturing process, that is, without switching off the paper or Cardboard machine, one after the other on several empty winding cores, which also as Empty reels are referred to, or sporadically around the material web, i.e. after a tear off the paper or cardboard web or after starting the paper or board machine to wind up on a preferably empty winding core.

It must be ensured that the by separating the material web emerging web start is fed to the new winding core to this to form a new winding roll.

From the German published patent application DE 42 08 746 A1 a method for Change of coils known, in which one continuously to one Winding roller fed material web on a new spool (empty reel), which with the Winding roller is in contact, is transferred.

A middle part of the material web, a so-called transfer strip, is also included cut two cutters in one place, which above the Winding roller lies in the running direction of the material web. The transfer strip will on the top, that is to say on the side facing the empty drum, by means of a Adhesive feed device provided with an adhesive medium and on the Glued on surface of the empty drum. The transfer process is completed by the movement of the two cutting devices in the direction of the respective Bahn edge.

With this method it is assumed that the adhesive medium Ability to use the transfer strip at the latest when leaving the nip to tear through completely and reliably.

Unfortunately, this assumption is rarely found in practice Confirmation. This was also recognized by the inventors of the cited document and for the Separate the transfer strip (cutting the material web between the Cutting lines) proposed a separate strip separator. Thus in this embodiment, that already from US Pat. No. 4,445,646 A known method used to the full extent that the supply of Adhesive medium on the top of the transfer strip was expanded.

Disadvantages of this method are the construction effort and the extremely large number of components and groups. Also the time synchronization and The reproducibility of the individual process steps is one Uncertainty factor in the transfer of paper webs. The procedure is above to transfer paper webs with high tear strength, such as for example plastic sheets and cardboard, absolutely not suitable.

The use of adhesives to separate and transfer the The transfer strip to the empty reel is also available from the PCT-Offenlegungsschrift WO 97/48632 A1 known methods in the foreground. Next the double-sided adhesive tape or label already disclosed is also used here Use of adhesives in the form of hot melt and the like proposed.

In addition, it is not just the top application of the adhesives to the Material web, but also the application of the adhesives to the outer surface of the empty reel. This is another way of Adhesive feed, which however has no decisive influence on the increase in Has reliability of the process.

A difference compared to the German published application cited at the beginning is here, however, in the arrangement and selection of the cutting devices too Find. One does without the use of mechanical circular knives, which in practice have many disadvantages anyway, and instead sees that Water jet as a separation medium with which the material web both before and can also be cut directly on the winding roller.

The limitation to cutting the material web with a water jet at a point where it is already guided and supported over part of the winding roller is not absolutely necessary for process reasons. However, since a water jet separating device in front of the winding roller was already known from the already mentioned German published application DE 42 08 746 A1, in particular column 5 , line 32 , this restriction can still be understood. The main disadvantage of this method is that it is absolutely unsuitable for transferring paper webs with high tear strength.

Another thought regarding the separation of the transfer strip is in the European patent application EP 0 543 788 A1. The separate Strip separator is arranged after the nip, but in contrast to the two cited documents DE 42 08 746 A1 and US 4,445,646 A do not the top of the web. Cutting the transfer strip, for example with one directed against the material web and empty reel Air jet can now be designed relatively reliably with many material webs. To implement this arrangement, however, the contact between the Winding roller and the full roll can be lifted at least briefly what represents a serious disadvantage in a continuous winding process. In In most cases, special winding processes are required for this, which can be found under other center drives and replacement nip-forming elements. Such methods and devices are described, for example, in the two European patents EP 0 483 092 B1 and EP 0 788 991 B1, the PCT published patent application WO 98/52858 A1 and German published patent application DE 198 07 897 A1 described. However, these require higher investment and Operating cost. In addition, they can cause damage due to their mechanisms of action lead on the surface of the material web.

Another disadvantage of this method is the rather random transfer of the At the beginning of the web it shows the empty drum. It is blowing with an air jet revealed, but in reality you trust a so-called Self-performance of the beginning of the web on the new winding core. In practice this is Method can only be used to a limited extent: material webs with, for example, high Leave the basis weight or stiffness, such as cardboard not convict at all in this way. It is also through the missing connection between the beginning of the web and empty drum no cleaner Guaranteed start of winding.

Furthermore, US Pat. No. 5,954,290 A also discloses a device for Transfer of a running paper web to a new winding core. It is provided that a high-strength in an edge region of the paper web Separating tape, the length of which is a multiple of the material web width, directly in this way The nip can be brought in that its start is with the new winding core combines. The separating tape then spirals onto the new winding core on, ripping through the entire web of material at the same time and on the new one Coiled core transferred.

Although this has been known for decades and especially in the Paper industry practices are constantly improving and improving over time was further developed, its fundamental disadvantage has not been eliminated to date become. This consists in the fact that after the reel change on the Surface of the winding core remaining separating tape, the thickness of which Process reasons must not be arbitrarily small, always pressure points in the material web generated, which creates a considerable amount of rejects in the core area of the winding lead to the efficiency of the entire manufacturing process is severely impaired. Another systemic disadvantage of this method can be seen in the constraint that the separating tape is inserted directly into the nip must be, whereby the position of the nip is practically unchangeable. About that in addition, the separating tape used to tear the web of material not only provides potentially a great risk of injury and death for the operating personnel Also the question of an environmentally friendly disposal of the as Disposable separating tape used is becoming increasingly important.

Other procedures and methods are available from various other publications Devices for transferring a running material web to a new one Winding core known, but all of them with more or less large Disadvantages are.

For example, US Pat. No. 4,444,362 A discloses a method in which there is in principle no transfer strip at all, since the beginning of the web by means of the cross cutting devices completely before the winding roller is trained.

The arrangement of the cross-separating devices after the nip is in comparison a much more reliable process was developed, which also applies to the No formation of transfer strips. This from the European However, patent application EP 0 997 417 A1 can only use known methods a retractor can be used with center drive and replacement nip-forming elements.

Furthermore, the German patent DE 35 15 519 C2 describes a method in which a transfer strip is formed, its connection to the leading path is completely separated before the nip. In the same way as in the US patent US 4,444,362 A, however, this also arises here Question how the "bound to nothing" start reliably up to the nip can be transported and performed on the new winding core?

The object of the present invention is therefore a method and to create a winding machine of the type mentioned that an optimal Transfer of a running material web to a new winding core at high Process reliability, process efficiency and cheap investment and Process costs enable and the disadvantages of the known prior art entirely avoid. In addition, the method should be possible for all known types of retractors and a wide range of material webs can be applied equally.

According to the invention, this object is achieved in a method in that at least one opening, in particular a slot or an insertion surface, in the Area of the material web, preferably by means of a first separating device is generated that at least one initial separator in the area of the insertion surface is introduced between the material web and a winding roller such that a The area of the inserted initial separator is not covered by the material web is that the initial separator after reaching one of the winding roller and the new winding core formed nips at least temporarily in the covered area is connected to the new winding core, and that at the latest at the run-off point of the material web of the new winding core Separation of the material web effected and / or enabled by the initial separating piece , whereby at least two new ones are attached to the initial separator and the new one Wound core bound web beginnings are formed.

Both by creating at least one opening, in particular one Slit or an insertion surface, preferably in the area of the material web by means of a first separating device and also by the targeted introduction at least one initial separator between the material web and the winding roller, which after reaching the nip in the not covered by the material web Area is connected to the new winding core, and the defined separation the web of material through the initial separator, forming at least two newer, bound to the initial separator and the new winding core Beginnings of webs completely overcome the known disadvantages of the prior art avoided.

In particular, due to the defined and safe training at least two new, bound web starts an absolutely clean start of winding guaranteed, which is one of the most important prerequisites for an optimal winding structure and represents a small amount of rejects. At the same time, with the few Process steps comprehensive procedures the highest reproducibility and associated reliability when transferring running material webs on new winding cores at extremely low investment and process costs achieved.

In a first embodiment of the method according to the invention, that the introduction surface in the area of the material web is preferably by means of a first separating device by generating at least one lead strip is produced. The creation of such an insertion surface creates under another the technological advantage that the initial separator due to the larger area can be transferred better and safer to the new winding core can.

In further configurations according to the invention it is proposed that the Insertion surface is generated in the middle of the material web and / or that at least one insertion area in the middle, between the two edge areas lying area of the material web is generated and / or that at least one Insertion surface, preferably two insertion surfaces in the two edge areas the material web is or will be generated. The generation of at least one Insertion area depends fundamentally on the respective application, whereby however, each individual design has certain advantages, such as that Avoiding a so-called wrap carrot.

The at least one is advantageously a strip width in the range of 10 mm up to 250 mm, in particular from 25 mm to 100 nm Leakage strips by means of a first separating device, such as a tried and tested cutting element, the strip width again from depends on the respective application.

With regard to both the runnability and the process reliability of the process it is favorable if the discharge strip has a negative pressure by means of at least one from 0.01 bar to 0.2 bar, preferably from 0.05 bar to 0.1 bar Laxative device is discharged immediately after its generation. That way he can no longer adversely affect the introduction of the initial separating piece, or at all hinder.

In a further embodiment of the invention, an initial separating piece is used, which is provided with means in the area not covered by the material web, with those at the latest when the winding roller and the new one are reached Nips formed by the winding core, at least one temporary, sufficiently firm connection between the initial separator and the new winding core is produced. With these agents according to the invention for example an adhesive, vulcanization, Velcro, suction button, Positive, frictional or welded connection or a magnetic or electrostatic connection with the new winding core. All of these Common is that they are good value for money distinguish and also an above-average process reliability exhibit.

Furthermore, an initial separator is used, which in the of Material covered area has at least one adhesive area to at least one temporary connection between the material web or between the new start of the path and the initial separator manufacture.

In order not to achieve a noticeable increase in diameter, a is preferably used Initial separator with a thickness in the range from 0.5 mm to 0.05 mm, preferably in the range of 0.25 mm to 0.1 mm. This thickness ensures that there are no marks in the material web due to the initial separator arise.

Furthermore, an initial separating piece designed as a shaped piece is used, which is made of a plastic, a metal, a textile material, a tear-resistant fibrous material, in particular paper, or at least one Material combination exists. Through this fitting, the handling of the Initial separator much easier, but without the transfer of to negatively influence the running material web on a new winding core.

The initial separator can also be a preferably easily detachable part of a Be trained carrier.

Alternatively, the initial separator can be inserted between the Material web and the winding roller by means of a relatively easily detachable connection be attached at least one carrier, the at least one carrier after leaving the nip, ideally neither with the new start of the path nor carried with the new winding core.

So that two new starts of the path are preferably formed in a defined manner, that is Initial separator with means for punching, cutting, perforating or embossing the Provide the material web with which at the latest at the point of discharge of the material web weakened or even weakened the web of material from the new winding core is severed.

The initial separator is in a further embodiment of the invention by means of at least a delivery device essentially directly between the material web and introduced the winding roller.

The initial separator does not become one of the material web wrapped winding roller by means of at least one delivery device in the essentially introduced directly into the nip or it is by means of at least one Dispensing device indirectly between the material web and the winding roller introduced or it is first applied to the underside of the material web and then by means of the material web between the material web and the Winding roller introduced or it is first on the temporary connection Shell surface of the winding roller applied and then by means of the winding roller introduced between the material web and the winding roller, the temporary Connection by means of at least one adhesive surface, by means of electrostatic forces, by means of magnetic forces, by means of vacuum application to the winding roller, by means of Velcro or by means of at least one suction button coupling will be produced.

All of these locations and opportunities mentioned have the aim of one Fast and process-reliable transfer of the current Material web on a new winding core.

Advantageously, the widths on the new winding core transferred web beginnings enlarged by means of a second separating device, that the entire material web is transferred to the new winding core. there becomes the second separating device in a plane approximately parallel to the material web moved relative to the material web, preferably at least substantially perpendicular to the direction of travel of the material web that creates oblique dividing lines become. By means of these configurations, a shortened period of time for the Transfer of a running material web to a new winding core, whereby the inevitable amount of rejects is reduced. By the symmetry given at the beginning of the winding also becomes general unwanted conical winding structure avoided.

With a view to a quick and reliable transfer of the current Material web on a new winding core is at the latest at the expiry point of the Material web from the new winding core at least part of the material web essentially completely severed by the initial separator. Doing so preferably at the latest at the point of discharge of the material web from the new one Winding core at least part of the material web along one of the Initial separator specified separation contour essentially completely cut.

According to the invention, the object is achieved in a winding machine in that that a first separating device for producing at least one opening, in particular a slot or an insertion surface in the area of the material web is arranged and that at least one delivery device for introduction at least one initial separator between the material web and the Winding roller is arranged such that the initial separator is essentially direct or can be introduced indirectly between the material web and the winding roller.

Here, those already specified for the method according to the invention are given Benefits achieved.

In further refinements of the invention, the delivery devices are of this type arranged that the initial separator first on the underside of the material web is applied and then by means of the material web between the material web and the winding roller can be inserted or that the initial separating piece at first temporary connection is applied to the outer surface of the winding roller and then by means of the winding roller between the material web and the Winding roller can be inserted. These configurations allow the adaptation of the Winding machine to every conceivable application at high Process reliability and a good cost-benefit ratio.

In an advantageous embodiment, the initial separating piece points in that of the material web both covered and uncovered area at least one adhesive area. This creates the possibility that the Initial separator with both the material web and the lateral surface of the new winding core an ideal connection.

The initial separator points in the area covered by the material web at least one separating contour, which is preferably neither in the running direction nor is formed transversely to the direction of travel of the material web. This separation contour favors the actual separation process and thus increases process reliability for transferring the running material web to a new winding core.

Furthermore, the initial separator ideally has a thickness in the range of 0.5 mm to 0.05 mm, preferably in the range from 0.25 mm to 0.1 mm, is as a fitting made of a plastic, a metal, a textile material, a tear-resistant fibrous material, in particular paper, or from at least one Material combination is formed as part of a carrier and / or is before the introduction between the material web and the winding roller by means of a relatively easily detachable connection on at least one carrier appropriate. These mentioned possible properties of the initial separator also favor the actual separation process and thus increase the Process reliability for transferring the running material web to a new one Winding core.

According to the invention, the first and / or the second separating device are in the area the winding roller and / or in the direction of travel of the material web in front of the winding roller in the area of a free running path and / or in the running direction of the material web in an area in which the material web at least one of the winding roller upstream rollers touched, arranged.

Furthermore, the first and / or the second separating device are on the top and / or arranged on the underside of the material web and they are in a common Assembly arranged with preferably common components.

These configurations with regard to the arrangements of the first and the second separating device enable the winding machine to be adapted every conceivable application with high process reliability and a good one Cost-benefit ratio.

With regard to short transfer times of the running material web to one new winding core is the second separating device in the areas of Material web arranged, which are not part of the beginning of the web and must be separated are.

In general, at least two are preferred as separating devices independent cutting elements with a respective beam of high energy density, in particular a water jet or laser beam cutting element is provided. Such cutting elements have already been found in many different ways in practice Proven.

In terms of process technology, the initial separator is the last one Equipment and / or the last element - seen in the direction of travel of the material web - for separating and / or transferring the material web to the new one Winding core.

It is understood that the above and below still apply explanatory features of the invention not only in the specified Combination, but can also be used in other combinations or alone are without departing from the scope of the invention.

Further features and advantages of the invention result from the Subclaims and the following description of preferred exemplary embodiments with reference to the drawing.

Show it

Figure 1 is a schematic and perspective winding machine according to the prior art.

Fig. 2 to 4 and schematic perspective views of a winding machine according to a first embodiment of the invention;

Fig. 5 shows an embodiment of the winding machine in a schematic side view of the invention;

Fig. 6 is a schematic, perspective view of one of the possible embodiments of the initial cutting piece of the invention;

Figure 7 is a schematic side view of a winding machine during threading of the material web to a new winding core, for example after a demolition. and

FIGS. 8 and 9 diagrammatic side views of two different winding machine during threading of the material web to a new core during a roll change.

Some terms used in the following description are defined as follows:
A separating device is a device that has at least one cutting element with which at least one separation or at least one weakening of a material web can be produced.

A separating device, in particular a transverse separating device, is one Device which has at least one cutting element with which at least one, in their position, preferably seen transversely to the direction of travel of a material web, changeable separation or weakening of the material web can be generated.

A nip is an area of a winding roller in which it influences can use a winding roll or a new winding core.

A nip between the winding roller and the new winding core is in the sense of this Invention also given when this one for producing a Suitable connection between an initial separator and the new winding core Form a gap.

An initial revolution is the first full revolution of a new winding core after a successful connection between an initial separator and a new one Winding core.

Fig. 1 shows a schematic and perspective winding machine 1 according to the prior art. Such a winding machine is well known for example from PCT publication WO 98/52858 A1 (~ EP 0 912 435 A1; US 6,129,305 A) or the already mentioned documents EP 0 543 788 A1, DE 35 15 519 C2 or US 4,445,646 A; the content of these writings is hereby made the subject of this description.

The winding machine 1 includes, among other things, a winding roller 2, also referred to as a pressing drum or a carrying drum. The material web 3 is either led out of a smoothing unit / calender, not shown here, final group of a finishing machine or a drying section of a paper or board machine, also not shown here, then usually wraps around a guide or spreader roll, also not shown, and then runs in the direction of travel L on the Shell surface 4 of the winding roller 2 , wraps around the shell surface 4 of the winding roller 2 by a certain angle (“wrap angle”) up to the nip N1 present between the winding roller 2 and a winding roller 5 and is finally wound onto the winding roller 5 . When the winding roll 5 has now reached a predetermined diameter D _W , a new winding core 6 (empty reel) is pre-accelerated by means of a drive device (not shown) and brought into contact with the winding roller 2 to form a nip N2. Thereafter, at least one separation 7 is usually made in the running material web 3 in front of or on the winding roller 2 in at least one web edge 8 by means of at least one known separating device 9 , whereby at least one transfer strip 10 is formed. To transfer the entire material web 3 to the new winding core 6 , the transfer strip 10 is cut and transferred to the new winding core 6 .

Many variants of such a method for transferring an ongoing one Material web on a new winding core with formation of at least one Transfer strips are, among other things, from the writings mentioned at the beginning is known, but none of these variants is for separating the transfer strip and for threading the transfer strip onto the new winding core Introducing at least one element on the side facing the winding roller the material web provided.

FIGS. 2 to 4 schematic and perspective views of a winding machine 1 according to a first embodiment of the invention, where the structural design including control technology in principle to the wrapping machine 1 of FIG. 1 corresponds, with which a reference is made to FIG. 1. The material web 3 is shown in a transparent form so that the components and assemblies underneath are visible.

According to the invention, it is now provided that, as shown in FIG. 2, preferably in the center M of the material web 3, at least one opening 17 , in particular a slot or an insertion surface 17.1 , preferably by means of a first separating device 9.1 , is created in the region of the insertion surface 17 at least one initial separating piece 11 is inserted between the material web 3 and the winding roller 2 such that an area 11.1 of the introduced initial separating piece 11 is not covered by the material web 3 such that the initial separating piece 11 after reaching a nip formed by the winding roller 2 and the new winding core 6 N2 is connected at least temporarily in the uncovered area 11.1 to the new winding core 6 , and that at the latest at the point of departure Q of the material web 3 from the new winding core 6, a separation of the material web 3 is effected and / or made possible by the initial separating piece 11 , whereby at least two new, to the initial separator k 11 and the new winding core 6 bound web beginnings are formed.

The at least one insertion surface 17.1 is preferably generated by means of the first separating device 9.1 by producing at least one discharge strip 18 .

In a further, but not shown embodiment, the insertion surface 17.1 can also be produced in the central region of the material web 3 lying between the two edge regions 8.1 . Also, at least one introduction area 17.1, preferably two Einbringflächen 17.1 of the material web 3 are produced in the two edge regions 8.1, can be accelerated in an advantageous manner, whereby the transfer of the material web. 3

The discharge strip 18 , which has at least one strip width B _S in the range from 10 mm to 250 mm, in particular from 25 mm to 100 nm, is produced by means of a first separating device 9.1 and by means of at least one a negative pressure of 0.01 bar to 0.2 bar , preferably from 0.05 bar to 0.1 bar, having discharge device 19 removed directly after its generation. In the simplest case, this discharge device 19 can be designed as an ordinary suction hose. On the running run of the discharge device 19 there is advantageously at least one cutting device, preferably a cutting edge, for separating the discharge strip 18 once and for the first time.

In the further course of the method, the nip N2 formed by the winding roller 2 and the new winding core 6 is reached by the initial separating piece 11 , in which the initial separating piece 11 in its area 11.1 is connected to the new winding core 6 at least temporarily and sufficiently firmly by means, whereby an adhesive, vulcanization, hook-and-loop fastener, suction button, positive-locking, frictional or welded connection or a magnetic or electrostatic connection with the new winding core 6 is produced with these means.

As already mentioned, the discharge strip 18 is produced by a first separating device 9.1 . The beginning of the cut of the dividing lines 9.11 of the discharge strip 18 can be made parallel, punctiform and enlarging or crossing and enlarging. Since this type of production of a cut start is part of the known prior art, it will not be discussed further here. Rather, reference is made, for example, to the already mentioned European patent application EP 0 543 788 A1.

Furthermore, the first and / or the second separating device 9.1 , 9.2 is arranged in a common assembly with preferably common components, in particular a common carrier.

The formation of only one opening in the form of a cut is also sufficient to meet the requirement for generating a sufficiently large To create space for the insertion of an initial separator. The big enough Surface can, for example, by means of an element immersed in the cut with an outer contour spreading in the running direction of the material web or by means of a Guidance of the cut material web created by an spreader roller become.

In FIG. 3, the initial separating piece 11 transferred to the new winding core 6 , together with its two new web starts, is explicitly shown during the initial revolution.

Furthermore, it is clearly evident that at least two further dividing lines 9.21 , the spacing of which is preferably smaller than the width of the initial separating piece , are generated by means of a second separating device 9.2 . The dividing lines 9.21 initially preferably run parallel to one another.

FIG. 4 shows the continuation of FIG. 3. Now the widths of the web starts transferred to the new winding core 6 are increased by means of a second separating device 9.2 in such a way that the entire material web 3 is transferred to the new winding core 6 . The generation of the transfer strip 19 is discontinued, preferably by moving the two separating lines 9.11 together or by switching off the first separating device 9.1 .

The second separating device 9.2 is preferably moved in a substantially parallel plane relative to the material web 3 to the material web 3, preferably at least substantially perpendicular to the direction L of the material web 3, so that oblique dividing lines 21/09 are generated.

The running material web 3 was now almost completely severed by means of the second separating device 9.2 and transferred to the new winding core 6 to the appropriate extent.

FIG. 5 shows an embodiment of the invention the winding machine 1 in a schematic side view.

The incorporation of the present invention an initial cutting piece 11 between the web 3 and the winding roll 2 such that a portion of the introduced initial separating piece 11 is not covered by the web of material 3, according to the invention by means of one of the delivery devices 12, realized 12.1 or 12.2 on a direct or indirect way. The delivery device 12 , 12.1 or 12.2 has, for example, the shape and function of a paper magazine of a plotter or a printer with multi or single sheet delivery.

In the preferred embodiment it is provided that the delivery device 12 , which is only indicated, is arranged such that the initial separating piece 11 can be introduced essentially directly between the material web 3 and the winding roller 2 . In addition to the simple design of the dispensing device 12 and the initial separator 11 , this arrangement also has the advantage that the speed at which the initial separator 11 can be introduced, which can be many times lower than the material web speed. In addition, a special guidance of the initial separating piece 11 can be dispensed with entirely, since it is sufficiently guided by the material web 3 and the winding roller 2 on the way to the nip N2.

Alternatively, the dispensing device may be 12.1 arranged so that the initial cutting piece 11 on the material web 3 can be applied first and then the lower side by means of the material web 3 between the web 3 and the winding roll 2 can be inserted. This variant offers a good possibility for introducing the initial separating piece 11 , particularly in the case of limited space. The dispensing device 12.2 can also be arranged such that the initial separating piece 11 can first be applied to the lateral surface 4 of the winding roller 2 with a temporary connection and then can be inserted between the material web 3 and the winding roller 2 by means of the winding roller 2 . The temporary connection can be made, for example, in the form of an adhesive connection à la "Post it", or in the case of a vacuumed winding roller, which was known from the German patent application DE 198 22 052 A1, by means of vacuum. There is also the possibility of providing a suitable delivery device in the extension of the winding roller 2 , as is usually the case with the known rope sheaves. Each of these variants can be advantageous depending on the guidance of the material web 3 , its properties and the special features of the winding machine.

In a further, but not shown embodiment of the invention, it is also possible that the delivery device in an area above the material web is attached and the initial separator, as already stated, directly or indirectly between the material web and the new winding core. It can Initial separator have the same contour, the adhesive area between the Initial separator and the material web, however, must be special, in particular with regard to its adhesive effect.

According to the prior art, the first and / or second separating device 9.1 , 9.2 can be arranged above or below the material web 3 in front of the nip N2 and at least one cutting element, preferably a cutting element with a beam of high energy density, in particular a water jet or laser beam cutting element exhibit.

Since there is no clearly preferred arrangement of the first and / or second separation device 9.1 , 9.2 , as can clearly be seen from FIG. 5, there is a very large number of possible combinations in the arrangement of the dispensing device 12 , 12.1 , 12.2 and the first and / or second separating device 9.1 , 9.2 with the winding machine 1 .

An exemplary embodiment of the initial separating piece 11 according to the invention can be seen from FIG. 6.

Essentially, the initial separator 11 , the thickness D of which is in the range from 0.5 mm to 0.05 mm, preferably in the range from 0.25 mm to 0.1 mm, as a molded part made of a plastic, a metal, a textile material or a fibrous material. Since the establishment of a connection between the initial separating piece 11 and the new winding core is one of the essential method steps, the initial separating piece 11 is provided with means 15 for this connection, which means can extend over one, several or the whole part of the initial separating piece 11 . In the case of adhesives alone, there is a practically unlimited spectrum of means available with which such a connection can be made. With regard to the reuse of the winding cores, very good results are achieved in particular with removable adhesives, similar to Tesa-Powerstrip from Beiersdorf. The use of hot melts, which have neutral adhesive properties at ambient temperature and only become connectable after a certain temperature has been reached, is very interesting not only in terms of the automated handling and feeding of the initial separating pieces to the dispensing device. For example, an initial separator laminated with hot melt, similar to the single sheet feed of a commercially available printer, can be easily and reliably fed from a storage cassette to the actual dispensing device and the desired adhesive properties can be activated at a later point in time by supplying heat. In this way, a suitable, reactive hot melt can also be used to establish a temporary connection between the initial separating piece and the new winding core, which connection lasts at least for the duration of an initial revolution. Comparable advantages can be achieved by using encapsulated adhesives, which are only activated by exerting a certain pressure. The list of all possible connection types with a detailed description of the advantages resulting therefrom is not critical for this invention and would certainly go beyond the scope of this document. For this reason, it should only be generally pointed out that this connection can also be designed as a positive connection, in particular a Velcro connection, as a welded connection, in particular a thermal welded connection, or as a magnetic connection, so that the initial separating piece is connected to the new winding core and its Can perform tasks.

The task of the initial separator is, among other things, to separate the transfer strip and can be carried out on a large number of material webs by means of an edge designed as a separating contour 13 . A new, at the initial cutting piece 11 and the new core bonded web beginning can be formed by the enclosed between the new core and the initial cutting piece 11 transfer strip is completely separated by the initial cutting piece 11 essentially by tearing along the dividing contour. 13 In order to make tearing progressive and therefore reliable, the corresponding edge can be formed at an angle that is matched to the tearing behavior of the material web. Due to the process, the new start of the path is enclosed between the new winding core and the initial separator 11 and is thus already bound to them. To improve the binding of the new web beginnings to the initial separating piece 11 , this can additionally be provided with, for example, adhesive areas 14 , which can also be used for the indirect introduction of the initial separating piece between the material web and the winding roller by means of a dispensing device. On the back of the initial separator 11 can also be provided with suitable means, not shown here, with which a temporary connection between the initial separator and the winding roller is established when the initial separator is inserted indirectly between the transfer strips and the winding roller by means of a dispenser.

Many disadvantages of the known prior art are avoided by forming the initial separator 11 from an extremely thin material. According to the invention, it is provided that the initial separating piece 11 is attached to at least one carrier 16 by means of a relatively easily detachable connection before it is introduced between the material web (not shown) and the winding roller (also not shown), which, after the formation of the new initial separating piece 11 and the new winding core bound web beginnings with the new winding core is not carried. The advantage of an initial separator 11 designed as a composite object is the almost unlimited freedom of configuration of its physical and mechanical properties. For example, the material thickness can now be reduced regardless of the associated stiffness of the initial separator, because the stiffness required for process reasons can be achieved by the carrier 16 . In addition, the carrier 16 can be designed such that the introduction of the initial separating piece 11 between the material web and the winding roller can be carried out automatically and absolutely reliably by means of a dispensing device.

The initial separator can also be used as a composite object with means for separating the material web are designed with which the new web start through Punching, cutting, pressing or embossing or by a combination thereof, with the help of the forces in the nip or by at least one Auxiliary device, not shown, additionally arranged in front of the nip, is trained. When transferring material webs that have a defined Have melting point behavior, such as plastic sheets, can also Heat can be used to separate the web of material in that the Initial separator with an electrical resistance wire as a means of separation is designed. The energy required to generate heat can for example by inductive means, preferably immediately before the nip, by means of a known device, not shown here, are transmitted without contact.

The relatively easy detachable connection between the initial separator and the Carrier can be detached, for example as soon as a new one is attached to the initial separator and the new winding core bound web start is formed, whereby the Carrier is specifically not carried with the new winding core. With regard to the The application and design of these funds will affect the German Patent application DE. , , dated 21.12.2001 of the applicant (file number: PR 11366 DE) directed. The content of this patent application is hereby the subject made this description.

The principal difference between the run-off point Q of the material web 3 from the new winding core 6 and between the winding roller 2 and the new winding core 6 nip N2 formed is not only apparent from Figs. 7 to 9, but also the fact that the continuation of the Material web 3 according to the Nip N2 has no fundamental influence on the process and the process can be used universally for all types of winding machines established in practice.

FIG. 7 shows a schematic side view of a winding machine 1 when threading a material web 3 onto a new winding core 6 in a state which arises sporadically, for example after the material web 3 is torn off. The winding roll is then usually removed from the winding machine 1 and the material web 3 is fed to a collecting container (not shown). After the new winding core 6 is not wrapped around by the material web 3 , the outlet point Q of the material web 3 from the new winding core 6 is identical to the nip N2 formed between the winding roller 2 and the new winding core 6 .

FIG. 8 shows a schematic side view of a winding machine 1 when threading a material web 3 onto a new winding core 6 during a roll change. When the winding roll 5 forming the nip N1 together with the winding roller 2 has reached a predetermined diameter, the material web 3 is fed onto the new winding core 6 without interrupting the production process. In this arrangement, the new winding core 6 is not wrapped around by the material web 3 and the outlet point Q is identical to the nip N2.

In Fig. 9, which shows a schematic side view of a winding machine 1 of the alternative type when threading a material web 3 onto a new winding core 6 during a roll change, the new winding core 6 is wrapped in the material web 3 , whereby the run-off point Q of the material web 3 of the new winding core 6 is not identical to the nip N2 formed between the winding roller 2 and the new winding core 6 .

In summary, it should be noted that the invention creates a method and a winding machine of the type mentioned at the outset, which enable an optimal transfer of a running material web to a new winding core with high process reliability, process efficiency and low investment and operating costs and the disadvantages of the known state of the art Avoid technology entirely. In addition, the method can be used practically on all known types of reeling devices and for a wide range of material webs alike. LIST OF REFERENCES 1 Winder
2 winding rollers
3 material web
4 outer surface
5 winding roll
6 New winding core (empty reel)
7 separation
8 web edge
8.1 Border area
9 separating device
9.1 First separation device
9.11 dividing line
9.2 Second separation device
9.21 dividing line
10 transfer strips
11 initial separator
11.1 area (not covered)
12 , 12.1 , 12.2 delivery device
13 separating contour, means for separating
14 Adhesive area
15 medium (material web)
16 carriers
17 opening
17.1 Placement area
18 laxative strips
19 discharge device
B _S stripe width
D thickness (initial separator)
D _W diameter (winding roll)
L running direction (arrow)
M middle
N1 Nip (winding roller winding roller)
N2 Nip (winding roller-new winding core)
Q run-off point (material web)

Claims (49)

1. A method for transferring a running material web ( 3 ), in particular a paper or cardboard web, to a new winding core ( 6 ), characterized in that
that at least one opening ( 17 ), in particular a slot or an insertion surface ( 17.1 ), is created in the region of the material web ( 3 ), preferably by means of a first separating device ( 9.1 ),
that at least one initial separating piece ( 11 ) is introduced between the material web ( 3 ) and a winding roller ( 2 ) in the area of the opening ( 17 ) in such a way that an area ( 11.1 ) of the introduced initial separating piece ( 11 ) is not covered by the material web ( 3 ) becomes,
that the initial separating piece ( 11 ) is at least temporarily connected to the new winding core ( 6 ) in the uncovered area ( 11.1 ) after reaching a nip (N2) formed by the winding roller ( 2 ) and the new winding core ( 6 ), and
that at the latest at the outlet point (Q) of the material web ( 3 ) from the new winding core ( 6 ), a separation of the material web ( 3 ) is effected and / or made possible by the initial separating piece ( 11 ), whereby at least two new ones attached to the initial separating piece ( 11 ) and the new winding core ( 6 ) bound web beginnings are formed. 2. The method according to claim 1, characterized in that the introduction surface ( 17.1 ) in the region of the material web ( 3 ) is preferably generated by means of a first separating device ( 9.1 ) by producing at least one discharge strip ( 18 ). 3. The method according to claim 1 or 2, characterized in that the introduction surface ( 17.1 ) in the middle (M) of the material web ( 3 ) is generated. 4. The method according to claim 1 or 2, characterized in that at least one introduction surface ( 17.1 ) is generated in the central region of the material web ( 3 ) lying between the two edge regions ( 8.1 ). 5. The method according to claim 1 or 2, characterized in that at least one introduction surface ( 17.1 ), preferably two introduction surfaces ( 17.1 ) in the two edge regions ( 8.1 ) of the material web ( 3 ) is or are generated. 6. The method according to any one of the preceding claims, characterized in that the at least one discharge strip ( 18 ) having a strip width (B _S ) in the range from 10 mm to 250 mm, in particular from 25 mm to 100 nm, by means of a first separating device ( 9.1 ) is produced. 7. The method according to any one of the preceding claims, characterized in that the Abführstreifen (18) by means of at least one of a negative pressure of 0.01 bar to 0.2 bar, preferably 0.05 bar to 0.1 bar, having discharge means (19 ) is discharged immediately after its creation. 8. The method according to any one of the preceding claims, characterized in that an initial separating piece ( 11 ) is used which is provided in the area ( 11.1 ) not covered by the material web ( 3 ) with means ( 15 ) with which at the latest when the from the winding roller ( 2 ) and the new winding core ( 6 ) formed nips (N2) by the initial separating piece ( 11 ), an at least temporary, sufficiently strong connection between the initial separating piece ( 11 ) and the new winding core ( 6 ). 9. The method according to claim 8, characterized in that with these means ( 15 ) an adhesive, vulcanization, Velcro, suction button, positive, frictional or welded connection or a magnetic or electrostatic connection with the new winding core ( 6 ) will be produced. 10. The method according to any one of the preceding claims, characterized in that an initial separating piece ( 11 ) is used, which in the area covered by the material web ( 3 ) has at least one adhesive area to at least one temporary connection between the material web ( 3 ) or between the new beginning of the path and the initial separator ( 11 ). 11. The method according to any one of the preceding claims, characterized in that an initial separating piece ( 11 ) with a thickness (D) in the range from 0.5 mm to 0.05 mm, preferably in the range from 0.25 mm to 0.1 mm , is used. 12. The method according to any one of the preceding claims, characterized in that an initial separating piece ( 11 ) formed 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. 13. The method according to any one of the preceding claims, characterized in that the initial separating piece ( 11 ) is designed as a preferably easily detachable part of a carrier ( 16 ). 14. The method according to any one of claims 1 to 12, characterized in that the initial separating piece ( 11 ) before the introduction between the material web ( 3 ) and the winding roller ( 2 ) is attached to at least one carrier ( 16 ) by means of a relatively easily detachable connection , 15. The method according to claim 13 or 14, characterized in that the at least one carrier ( 16 ) after leaving the nip (N2) is carried neither with the new path start nor with the new winding core ( 6 ). 16. The method according to any one of the preceding claims, characterized in that the initial separating piece ( 11 ) is provided with means ( 13.1 ) for punching, cutting, perforating or embossing the material web ( 3 ), with which at the latest at the point of discharge (Q) of the material web ( 3 ) the material web ( 3 ) is weakened or even severed by the new winding core ( 6 ) in such a way that two new web beginnings are preferably formed in a defined manner. 17. The method according to any one of the preceding claims, characterized in that the initial cutting piece (11) is introduced by means of at least one dispensing device (12) substantially directly between the material web (3) and the winding roll (2). 18. The method according to claim 17, characterized in that the initial cutting piece (11) is substantially placed at a not wrapped by the web of material (3) winding roll (2) by means of at least one dispensing device (12) directly into the nip (N2). 19. The method according to any one of claims 1 to 16, characterized in that the initial separating piece ( 11 ) by means of at least one dispenser ( 12.1 , 12.2 ) is introduced indirectly between the material web ( 3 ) and the winding roller ( 2 ). 20. The method according to claim 19, characterized in that the initial cutting piece (11) is first applied on the underside of the material web (3) and is then introduced by means of the material web (3) between the material web (3) and the winding roll (2). 21. The method according to claim 19, characterized in that the initial separating piece ( 11 ) is first applied to the outer surface ( 4 ) of the winding roller ( 2 ) with a temporary connection and then by means of the winding roller ( 2 ) between the material web ( 3 ) and the winding roller ( 2 ) is introduced. 22. The method according to claim 21, characterized in that the temporary connection is established by means of at least one adhesive surface, by means of electrostatic forces, by means of magnetic forces, by means of vacuum application to the winding roller ( 2 ), by means of a Velcro fastener or by means of at least one suction button coupling. 23. The method according to any one of the preceding claims, characterized in that the widths of the web starts transferred to the new winding core ( 6 ) are increased by means of a second separating device ( 9.2 ) in such a way that the entire material web ( 3 ) on the new winding core ( 6 ) is transferred. 24. The method according to claim 23, characterized in that the second separation device (9.2) is moved in a roughly parallel to the material web (3) plane relative to the material web (3). 25. The method according to claim 23 or 24, characterized in that the second separating device ( 9.2 ) is moved at least substantially perpendicular to the running direction (L) of the material web ( 3 ), preferably such that oblique separating lines ( 9.21 ) are generated. 26. The method according to any one of the preceding claims, characterized in that at least at the outlet point (Q) of the material web ( 3 ) from the new winding core ( 6 ) at least part of the material web ( 3 ) is substantially completely severed by the initial separating piece ( 11 ) , 27. The method according to any one of the preceding claims, characterized in that at least at the outlet point (Q) of the material web ( 3 ) from the new winding core ( 6 ) at least part of the material web ( 3 ) along a separation contour ( 11 ) predetermined by the initial separating piece ( 11 ) 13 ) is essentially completely severed. 28. The method according to any one of the preceding claims, characterized in that through the initial separating piece ( 11 ) the last device and / or the last element - seen in the running direction (L) of the material web ( 3 ) - for separating and / or transferring the material web ( 3 ) is formed on a new winding core ( 6 ). 29. Winding machine ( 1 ) for carrying out a method according to at least one of the preceding claims, characterized in that
that a first separating device ( 9.1 ) for creating at least one opening ( 17 ), in particular a slot or an insertion surface ( 17.1 ), is arranged in the region of the material web ( 3 ) and
that at least one delivery device ( 12 ) for introducing at least one initial separating piece ( 11 ) is arranged between the material web ( 3 ) and the winding roller ( 2 ) in such a way that the initial separating piece ( 11 ) is essentially directly between the material web ( 3 ) and the winding roller ( 2 ) can be introduced. 30. winding machine ( 1 ) for performing a method according to at least one of the preceding claims 1 to 28, characterized in
that a first separating device ( 9.1 ) for creating at least one opening ( 17 ), in particular a slot or an insertion surface ( 17.1 ), is arranged in the region of the material web ( 3 ) and
that at least one delivery device ( 12.1 , 12.2 ) for introducing at least one initial separating piece ( 11 ) is arranged between the material web ( 3 ) and the winding roller ( 2 ) in such a way that the initial separating piece ( 11 ) indirectly between the material web ( 3 ) and the winding roller ( 2 ) can be introduced. 31. Winding machine ( 1 ) according to claim 30, characterized in that the dispensing device ( 12.1 ) is arranged such that the initial separating piece ( 11 ) is first applied to the underside of the material web ( 3 ) and then by means of the material web ( 3 ) between the material web ( 3 ) and the winding roller ( 2 ) can be introduced. 32. winding machine ( 1 ) according to claim 30, characterized in that the dispensing device ( 12.2 ) is arranged such that the initial separating piece ( 11 ) is first applied to the lateral surface ( 4 ) of the winding roller ( 2 ) with a temporary connection and then by means of Winding roller ( 2 ) between the material web ( 3 ) and the winding roller ( 2 ) can be inserted. 33. winding machine ( 1 ) according to any one of claims 29 to 32, characterized in that the initial separating piece ( 11 ) in the area ( 11.1 ) not covered by the material web ( 3 ) has at least one adhesive area ( 14 ). 34. winding machine ( 1 ) according to any one of claims 29 to 33, characterized in that the initial separating piece ( 11 ) in the area covered by the material web ( 3 ) has at least one adhesive area. 35. winding machine ( 1 ) according to one of claims 29 to 34, characterized in that the initial separating piece ( 11 ) in the area covered by the material web ( 3 ) has at least one separating contour ( 13 ). 36. winding machine ( 1 ) according to claim 35, characterized in that the separating contour ( 13 ) is neither in the running direction (L) nor transverse to the running direction (L) of the material web ( 3 ). 37. winding machine ( 1 ) according to one of the preceding claims 29 to 36, characterized in that the initial separating piece ( 11 ) has a thickness (D) in the range from 0.5 mm to 0.05 mm, preferably in the range from 0.25 mm up to 0.1 mm. 38. winding machine ( 1 ) according to one of claims 29 to 37, characterized in that the initial separating piece ( 11 ) is formed as a molded piece made of a plastic, a metal, a textile material, a tear-resistant fibrous material, in particular paper, or from at least one material combination is. 39. winding machine ( 1 ) according to any one of the preceding claims 29 to 38, characterized in that the initial separating piece ( 11 ) is designed as part of a carrier ( 16 ). 40. winding machine ( 1 ) according to any one of the preceding claims 29 to 39, characterized in that the initial separating piece ( 11 ) before insertion between the material web ( 3 ) and the winding roller ( 2 ) by means of a relatively easily releasable connection on at least one carrier ( 16 ) is attached. 41. Winding machine ( 1 ) according to one of the preceding claims 29 to 40, characterized in that the first and / or the second separating device ( 9.1 , 9.2 ) are arranged in the region of the winding roller ( 2 ). 42. Winding machine ( 1 ) according to one of the preceding claims 29 to 40, characterized in that the first and / or the second separating device ( 9.1 , 9.2 ) in the running direction (L) of the material web ( 3 ) in front of the winding roller ( 2 ) in the area a free path are arranged. 43. winding machine ( 1 ) according to any one of the preceding claims 29 to 40, characterized in that the first and / or the second separating device ( 9.1 , 9.2 ) in the running direction (L) of the material web ( 3 ) are arranged in an area in which the material web ( 3 ) touches at least one of the rollers upstream of the winding roller ( 2 ). 44. Winding machine ( 1 ) according to one of the preceding claims 29 to 43, characterized in that the first and / or the second separating device ( 9.1 , 9.2 ) are arranged on the upper side of the material web ( 3 ). 45. winding machine ( 1 ) according to one of the preceding claims 29 to 43, characterized in that the first and / or the second separating device ( 9.1 , 9.2 ) are arranged on the underside of the material web ( 3 ). 46. Winding machine ( 1 ) according to one of the preceding claims 29 to 45, characterized in that the first and / or the second separating device ( 9.1 , 9.2 ) are arranged in a common assembly with preferably common components. 47. Winding machine ( 1 ) according to one of the preceding claims 29 to 46, characterized in that the second separating device ( 9.2 ) is arranged in the regions of the material web ( 3 ) which are not part of the web beginnings and are to be separated. 48. Winding machine ( 1 ) according to one of the preceding claims 29 to 47, characterized in that at least two preferably independent cutting elements with a respective beam of high energy density, in particular a water jet or laser beam cutting element, are provided as the separating device ( 9.1 , 9.2 ) , 49. Winding machine ( 1 ) according to one of the preceding claims 29 to 48, characterized in that the initial separating piece ( 11 ) the last device and / or the last element - seen in the running direction (L) of the material web ( 3 ) - for separating and / or for transferring the material web ( 3 ) onto the new winding core ( 6 ).