WO2005026030A1

WO2005026030A1 - A method in a reel-up and a reel-up

Info

Publication number: WO2005026030A1
Application number: PCT/FI2004/050133
Authority: WO
Inventors: Ilkka Naatti; Risto MÄKINEN; Teppo Kojo; Vesa RIIHELÄ; Matti Kemppainen
Original assignee: Metso Paper, Inc.
Priority date: 2003-09-15
Filing date: 2004-09-14
Publication date: 2005-03-24
Also published as: FI20031311A0; FI20031311A; AT504004B1; FI117429B; AT504004A1; DE112004001693T5

Abstract

The invention relates to a method and a reel-up in a reeling up process in which a paper web is reeled continuously into reels around rotating cores (4) in such a manner that the web is guided into a reel (3) around the reeling core (4) via a reeling nip (2) between a loop of an endless supporting member (7) and the reel (3). At least at some stage the reeling core (4) is transferred in relation to the loop of the supporting member (7) in accordance with the growth of the diameter of the reel (3) in such a manner that the position of said reeling nip (2) moves forward on the portion of the endless supporting member (7) carrying the web (1) in the travel direction of said portion. The force pressing the surfaces of the web (1) and the endless supporting member (7) together and the holding between the web and the supporting member are controlled by means of negative pressure arranged at least on a part of the portion of the supporting member carrying the web.

Description

A METHOD IN A REEL-UP AND A REEL-UP

The invention relates to a method in reeling up in which a paper web is reeled continuously into reels around rotating reeling cores in such a manner that the web is guided into a reel around a reeling core via a reeling nip between the loop of an endless supporting member and the reel, and at least at some stage the reeling core is transferred in relation to the loop of the supporting member in accordance with the growth of the diameter of the reel so that the position of said reeling nip moves forward in the portion of the endless supporting member carrying the web in the travel direction of said portion, and the force pressing the surfaces of the web and the endless supporting member together and the holding between the web and the supporting member is controlled by means of negative pressure that is arranged at least on a part of the portion of the supporting member carrying the web. The invention also relates to a reel-up that is arranged to reel a paper web continuously into reels around rotating reeling cores, comprising at least a transfer device for moving the reeling core and the reel formed around the same during reeling, in which the paper web is continuously guided on a reel via a reeling nip, and a loop formed by an endless supporting member containing a portion carrying the web and forming a reeling nip, wherein the transfer device is arranged to move the reel in the reeling so that said reeling nip moves in the travel direction of the portion carrying the web, and a leading roll located inside the loop formed by the supporting member, as well as a negative pressure arrangement positioned at least partly inside the loop formed by the loop supporting member, and which is arranged to produce negative pressure at least on a part of the portion of the supporting member carrying the web to control the force pressing the surfaces of the endless sup- porting member together and the holding between the web and the surface of the supporting member.

In the final end of a paper machine or a finishing apparatus for paper, a typically several meters wide paper web, which has been produced and/or treated in earlier machine sections, is reeled around a reel spool to form a machine reel. In this reeling up process a reeling cylinder that is journalled rotatable is typically used for guiding the paper web on the machine reel, wherein the nip contact between the reeling cylinder and the machine reel is utilized to influence the quality of the reel produced thereby. In a conventional solution the reeling cylinder remains stationary and the reel spool around which the reel is accumulated in nip contact is moved during reeling up in a supporting structure, for example by supporting the ends of the reel spool on reeling rails. The ends of the reel spool are affected by means of a suitable loading mechanism to adjust the nip contact between the machine reel that is being formed and the reeling cylinder. Such reeling concepts and loading methods related thereto are disclosed, for example, in the Finnish patent 91383 and in the corresponding US patent 5,251,835, as well as in the Finnish patent application 950274 and in the corresponding US patent 5,690,298.

Another known solution is the one in which the reeling cylinder is arranged to move on a carriage, and the machine reel is rotated with a centre drive in a stationary reeling station, i.e. location of the centre of the reel spool remains the same. When the radius of the machine reel grows, the reeling cylinder shifts in such a manner that the carriage supporting the same moves in the guide. Such an arrangement is known, for example, from the European application publication 792829 and in the corresponding US patent 5,988,557.

US patent 5,370,327 discloses a solution in which the reeling cylinder moves in the vertical direction, thus making it possible to maintain the angular position of the nip between the reeling cylinder and the machine reel constant when the reel moves on the reeling rails. The low position of the reeling cylinder and the movement of the same in the vertical direction enable the transfer of the reel spools from a storage to a reeling station along a straight transfer path. The solution contains two pairs of reeling carriages, of which the pair that has delivered the full machine reel can return past the other pair that is guiding the reel to be reeled, to retrieve a new empty reel spool.

According to the Finnish patent application 950274 and the corresponding US patent 5,690,298 it is possible to use an auxiliary roll located at a lower position and moving in the vertical direction in addi- tion to the stationary reeling cylinder that guides the web on the reel, said auxiliary roll forming a second nip with the machine reel formed in the moving reeling station. Before the change this auxiliary roll is in contact with the reel that is becoming full, which has been run off the reeling cylinder. A corresponding arrangement in connection with a change is disclosed in the Finnish patent 91383/ US patent 5,251 ,835.

In addition, from the publication EP-860391 is known a reel-up, in which the web is guided on a reel via a belt or a wire, which is led via leading rolls. Thus, by means of the belt or the wire, a long reeling nip having an even pressure is provided on the area of the lower half of the reel. The pressure can be adjusted through the tension of the belt or the wire. The belt or wire loop can be tilted on the vertical plane in such a manner that the first leading roll in the travel direction of the web can be lifted against the new reel spool, which rests on the reeling rails above the belt. When the reel grows it moves forward on the reeling rails in such a manner that it is constantly in contact with the downwards-tilted run of the wire or belt, which follows the leading roll and via which the web comes on the reel.

In addition, from the patent US-5531396 is known a reel-up, in which the wire loop is guided over the reeling cylinder in such a manner that it guides the web after the reeling cylinder on the reel that is being formed.

In reel-ups utilizing a wire or a belt, problems are caused by bringing of the web on the wire or belt loop. As disclosed in the aforementioned publication EP-860391 , the web is brought to the loop at a point where the wire or the belt curves on top of the first leading roll. Thus, prob- lems are caused by the irregularity of the contact between the web and the loop, especially when the end of the web is brought to the reel-up.

The primary aim of the present invention is to introduce a method, by means of which it is possible to control the contact between the web and the wire or belt loop of the reel-up. To attain this purpose, the method according to the invention is primarily characterized in that during the run at least one of the following is changed: the effective area of the negative pressure, the location of the negative pressure, the intensity of the negative pressure. The reel- up according to the invention, in turn, is primarily characterized in that during the run at least one of the following can be adjusted: the effective area of the negative pressure produced by the negative pressure arrangement, location of the negative pressure produced by the negative pressure arrangement, intensity of the negative pressure produced by the negative pressure arrangement. Thus, it is possible to control the web tension within the limits permitted by the holding, by means of the drives of the supporting member and the reeling core.

The other, dependent claims present some preferred embodiments of the invention.

In the method according to the invention a paper web is reeled continuously into reels around rotating reeling cores in such a manner that the web is guided into a reel around a reeling core via a reeling nip between the loop of an endless supporting member and the reel, and at least at some stage the reeling core is transferred in relation to the loop of the supporting member in accordance with the growth of the diameter of the reel so that the position of said reeling nip shifts forward in the portion of the endless supporting member carrying the web in the travel direction of said portion. The force pressing the surfaces of the web and the endless supporting member together and at the same time the holding of the web and the supporting member are controlled by means of negative pressure exerted on the contact between the surface of the supporting member and the web. Preferably at least part of the air flow produced by the negative pressure travels from outside the loop to the inside, but in some preferred embodiments part of the air flow travels from inside the loop to the outside.

In a preferred embodiment at least part of the negative pressure is pro- duced by sucking air inside the loop of the supporting member for example by means of a suction box or by blowing air inside the loop by means of a blow box. The negative pressure of the reel-up according to the invention can be advantageously used at different stages of the reeling process, for example in the threading of the web, primary reeling, secondary reeling, reel change and/or shutdown of the broke processing system.

By means of the method according to the invention it is possible to simultaneously affect the force pressing the web and the surfaces of the endless supporting member together and the holding between the web and the surface of the supporting member. For example by increasing the negative pressure by increasing the suction flow it is possible to increase the friction and/or holding between the surfaces of the web and the supporting member.

By means of an embodiment of the method according to the invention it is possible to eliminate possible flutter of the web or partial web coming to the reel-up, which, in turn, has an advantageous effect on the reeling result.

In a preferred embodiment it is possible to adjust the force of the nip without affecting the tension of the web.

Versatile adjustments enable optimal reeling of different materials as well as reeling of different kinds of reels. The invention is especially suitable for reeling of air impermeable paper grades such as coated papers, but the invention can also be used for reeling of air permeable paper grades, wherein the negative pressure can produce a flow of air through the paper and the supporting member.

In the following, the invention will be described in more detail with reference to the appended principle drawings, in which

Fig. 1 illustrates schematically the main principle of a reel-up in a side view, and

Figs 2 to 6 show some embodiments of the negative pressure arrangement of a reel-up. For the sake of clarity, the figures only show the details necessary for understanding the invention. The structures and details which are not necessary for understanding the invention and which are obvious for anyone skilled in the art have been omitted from the figures in order to emphasize the characteristics of the invention.

Fig. 1 illustrates a continuously operating reel-up, where a normally several metres wide paper web 1 coming from a preceding section of a paper machine or a finishing apparatus for paper travels via a reeling nip 2 onto a reel 3. The reeling nip 2 is formed by means of a flexible supporting member 7 in the form of an endless loop, such as a belt or a wire. The supporting member 7 is guided via two leading rolls 8 and 9, at each of which the run of the member 7 turns to the opposite di- rection. In the travel direction of the web 1 the first leading roll 8 can form at the initial stage of the reeling process a "hard nip" with the reel 3 that is being started in such a manner that the supporting member 7 is in contact with the reel at a point where the member travels on the support of the leading roll 8 on the surface of the roll. The latter leading roll 9 or the first leading roll 8 can be a driven roll, i.e. a traction roll, or separate drives can be arranged for both rolls. The web 1 travels guided by the supporting member 7 onto the machine reel 3, which is formed around a reel spool 4 rotatable with its own centre drive. It is possible for the reel spool 4 to move in the machine direction with re- spect to the loop of the supporting member 7, and this is arranged in such a manner that the bearing housings at the ends of the reel spool that enable the rotation of the reel spool 4 are supported with suitable supporting structures. In connection with the reel-up, there is also a storage of empty reel spools 4 (not shown), from which the rolls are brought to the change station at the first leading roll 8 in order to change the web 1 going to the machine reel 3 that is becoming full. The reel change takes place at production speed i.e. the paper web 1 passed at high speed to the full reel 3 is changed to travel onto a new reel spool brought to the change station, said reel spool being rotated with a drive of its own at peripheral speed corresponding to said speed. The machine reel 3 can be transferred in the machine direction in a transfer device 5, which supports the bearing housings at the ends of the reel spool 4 and which is moved by means of actuators attached to the frame of the reel-up. The transfer device 5 is arranged to move on substantially horizontal reeling rails 6 extending in the machine direction, and it is formed of a carriage located at both ends of the reel spool 4, which supports the bearing housing at the end of the reel spool. When the diameter of the machine reel 3 grows, and the reel moves forward, it is in continuous contact with the supporting member 7 be- cause the transfer path of the transfer device 5 and the portion of the supporting member 7 carrying web 1 together form an angle opening in the transfer direction. In Fig. 1 , the upper portion of the loop of the supporting member 7 carrying the web 1 is directed diagonally downwards in its direction of movement, whereas the transfer path of the reel 3 (and the reel spool 4) is substantially horizontal.

The transfer device 5 is transferred forward along the reeling rails 6 in the travel direction of the web 1 in accordance with the growth of the diameter of the reel 3 so that the reel is, at its lower side, always in contact with the loop of the supporting member 7 in such a manner that the web moves over to the outer periphery of the reel 3 in the reeling nip 2 between the web-carrying portion of the loop and said outer periphery. Thus, the reeling nip 2 moves continuously forward in accordance with the growth of the reel 3 in the travel direction of the upper portion of the loop. When the reel 3 becomes full, the reel spool 4 forming the core of the reel is brought to the change station and the web 1 is changed to travel around the same at the production speed. The full reel 3 is removed from the transfer device 5 and the transfer device is moved back to the initial end of the portion of the loop carry- ing the web 1 , and the new reel spool 4 around which a new web has started to accumulate after the change is delivered thereto from the primary reeling station for secondary reeling.

The negative pressure arrangement of a reel-up according to the in- vention is shown in principle in Fig. 1. The negative pressure arrangement produces negative pressure (whose direction is shown by arrow F1 in the figure) that is directed at least through the surface of the sup- porting member 7 positioned against the web 1 advantageously from the side of the web towards the inner part of the loop of the supporting member. Thus, the negative pressure F1 brings the web 1 against the supporting member 7 and/or affects the force between the surfaces the web and the supporting member that are in contact with each other. Advantageously, the negative pressure F1 affects the friction between the surfaces of the web and the supporting member 7, wherein for example by increasing the negative pressure (for example by increasing the suction flow) it is possible to increase the magnitude of friction or holding. By affecting the web 1 and the friction/holding between the surfaces of the web 1 and the supporting member 7 it is possible to affect for instance the reeling result. It is advantageous to adjust the negative pressure F1 at different stages of the process, such as threading, primary reeling, secondary reeling, shutdown of the broke processing system and reel change.

To attain the negative pressure F1 , the negative pressure arrangement comprises suitable members, such as blowers 11 and nozzles 10. The negative pressure arrangement can be implemented in various ways and Figs 2 to 6 present some preferred embodiments of the negative pressure arrangement.

Fig. 2 shows a negative pressure arrangement of a reel-up, in which the air flow F1 penetrating the supporting member 7 is produced by guiding air away from the location of the first leading roll 8, preferably from inside said leading roll. The surface of the leading roll 8 positioned against the supporting member 7 is provided with air channels via which air is capable of flowing inside the leading roll. Typically the negative pressure and thus also the air flow F1 is produced by means of a blower 11 that sucks air from inside the leading roll 8. Said embodiment is especially advantageous when the end of the web 1 is conveyed to the reel-up via a "hard nip" of the reel-up, because in such a situation it is possible to bring the end of the web and the supporting member 7 of the reel-up in contact with each other at an advantageous stage in view of guiding the web. Typically the negative pressure F1 is produced in constant magnitude within the entire width of the supporting member 7, i.e. substantially within the width of the web 1 to be reeled, but it is possible to form the negative pressure arrangement in such a manner that the suction effect of the supporting member varies in the cross-direction of the web.

If necessary, the method shown in Fig. 2 for producing an air flow guided via the first leading roll 8 can also be applied in other rolls, for example in the posterior leading roll 9.

Fig. 3, in turn, shows a negative pressure arrangement of a reel-up, in which the negative pressure F1 is produced by guiding air away from the inside of the loop formed by the supporting member, advantageously from the area between the first leading roll 8 and the second leading roll 9. Typically, the air flow F1 generating the negative pressure is produced by means of a suction box 10a that can be continuous within the entire area. Advantageously, there are several suction boxes 10a, and preferably there are several suction boxes both in the travel direction and in the cross-direction of the web 1 (such as the separate sub-suction boxes 10c shown in Fig. 4). Preferably, however, the suction box 10 comprises a guiding element 12 arranged to move in a stepless manner, such as an intermediate wall 12 arranged to move along with the motion of the nip 2 in a stepless manner. The guiding element 12 can be coupled kinetically to the device 5 moving the reeling core 4. The guiding element 12 can also move transversely with respect to the travel direction of the web 1 , wherein it is possible to adjust the negative pressure area in the lateral direction. It is also possible to connect the above-described guiding element 12 and sub-suction box structures 10c together in many different ways, wherein for example in the transverse direction with respect to the travel direction of the web 1 there may be several sub-suction boxes containing guiding elements 12 arranged to move in the travel direction of the web. Thus, the air flow and the negative pressure F1 can be adjusted on different levels at different locations of the supporting member 7, wherein the force between the web 1 and the supporting member can also be adjusted in a versatile manner.

The purpose of the arrow representing the negative pressure F1 is merely to illustrate in principle the direction and location of the negative pressure and/or air flow and it does not describe the exact location, direction or distribution of the negative pressure and/or air flow. For example in Fig. 3 the negative pressure F1 and the air flow are distributed within the entire suction area in a manner determined by the suction box 10a. The same principle is also utilized in indicating the blowing air flow F2 shown in Fig. 6.

Fig. 4 shows such a preferred embodiment of a negative pressure arrangement that combines the embodiments shown in Figs 2 and 3. Furthermore, in the example, the suction box 10 is formed of several sub-suction boxes 10c that can be controlled separately. The negative pressure F1 (i.e. in said embodiment the air flow) can thus be formed both in the area between the first leading roll 8 and the leading rolls 8, 9. The sub-suction boxes 10c according to said embodiment make it possible to exert the suction effect on desired points in the area between the leading rolls 8, 9. Thus, if necessary, the suction effect can be exerted on any point of the area in which the web 1 and the supporting member 7 are connected together. Preferably, the intensity of the negative pressure F1 can also be adjusted separately at different locations of the reel-up, wherein for example at the leading roll 8 and between the leading rolls 8, 9 the negative pressure can be activated simultaneously or at different times, or the force of the air flow can vary at different points.

In the examples above the negative pressure F1 and the suction effect produced by the same is attained by conveying air away (i.e. by sucking air away by means of a blower) from said spaces. It is, however, possible to attain a corresponding suction effect in other ways as well. One way is presented in Fig. 5, in which a blow box 10b is arranged in- side the loop formed by the supporting member 7. From the blow box 10b air is blown to the space, and when said air flow is directed away from the inner surface of the supporting member 7, negative pressure is produced in the vicinity of the inner surface, said negative pressure producing an air flow and thus a negative pressure effect F1 that generates the suction effect exerted on the web 1. The length of the negative pressure area in the longitudinal direction of the supporting member 7 is advantageously adjusted in such a manner that it is effective before the reel 3 (i.e. before the nip 2) but not after the nip. Thus, in the suction box positioned most advantageously inside the loop of the supporting member 7 there is an intermediate wall 12 moving in a stepless manner with the movement of the nip 2, as shown in the embodiment of Fig. 3. The intermediate wall 12 can be coupled kinetically to the device 5 moving the reeling core 4. A stepless adjustment alternative is to divide the space (preferably suction box 10) in- side the loop of the supporting member 7 into compartments 10b at least in the travel direction of the supporting member, to which compartments negative pressure is coupled in a row in accordance with the progression of the nip 2. In a preferred embodiment there are compartments 10c also in the transverse direction, wherein it is possible to arrange the negative pressure area so that it corresponds to the width of webs 1 varying in width, in other words also the width of partial webs. Because there may be the above-described negative pressure zones in the area of the supporting member 7 also in the transverse direction and/or machine direction, it is advantageous to form the zones in such a manner that they can be adjusted separately in both said directions.

The above-presented examples describe an air flow F1 that is exerted towards the supporting member 7 from the direction of the web 1. However, in some use situations it is advantageous if the air flow is exerted from the supporting member 7 to the web 1. Fig. 6 shows an embodiment with a suction possibility and blowing possibility. In said embodiment the initial part of the reel-up contains an air flow F1 sucking the web 1 and the final part an air flow F2 blowing the web. Preferably the direction of the air flow F1 , F2 changes after the nip 2 between the web 1 and the supporting member 7. By using the blowing air flow F2 it is possible to facilitate the loosening of the web 1 from the surface of the supporting member 7, if necessary, for example in connection with the reel change when the end of the web is conveyed on a new reel spool 4. In one embodiment it is possible to use partly or entirely the same members 10 ,11 to produce a sucking F1 and blowing F2 air flow. In the figure the suction member 10 is shown in principle in such a manner that the suction member 10 is arranged inside the loop of the supporting member 7, to which suction member both a blowing and sucking blower 11 is connected. The suction member 10 can be implemented in many different ways, wherein the suction member can com- prise different kinds of channels and nozzles by means of which the desired air flow F1 , F2 is attained in the desired location.

The threading situation of the web 1 is shown as an example of the function of the reel-up according to the invention. In the threading situation the tail of the web 1 is conveyed by means of a suitable arrangement to the initial end of the conveying portion of the supporting member 7, from which the surface of the loop of the supporting member conveys it further to the travel direction of the loop. According to the invention, negative pressure is effective between the surface of the supporting member 7 and the web 1, said negative pressure bringing the tail substantially tightly and evenly in contact with the surface of the supporting member. Thus, the tail follows the travel path of the surface of the supporting member 7 typically towards the nip 2. The nip 2 is formed when an empty reel spool 4 is positioned against the belt of the supporting member 7 and the reel spool is brought in contact with the belt of the supporting member and the tail travelling on top of the same. When the tail travels through the nip 2, the web is spread in full with by means of diagonal cutting that can be performed by means of methods known as such. In a preferred embodiment of the invention the nega- tive pressure area is extended simultaneously in such a manner that the negative pressure are is substantially equal in width with the web 1 or partial web in every cutting situation. After the spreading of the web the full-width web 1 travelling through the nip 2 is transferred by means of a suitable method around an empty reel spool 4, for example by means of blowings. When the end of the web 1 is thus brought on the reel spool 4, it is possible to start the continuous reeling up into successive machine reels.

The tail can be formed of a so-called trim separated from the edge of a full-width web 1 , but it can also be formed of a strip separated from the central area of the web. It is advantageous that the negative pressure arrangement is such that the suction zone is effective on an area nar- rower than the travel width of a full-width web 1 , if necessary, preferably only at that point where the tail or the web travels. Thus, the negative pressure is produced only in the compartment 10c located by the tail, or compartments to which for example suction or blowing is exerted, wherein the compartments located in said area produce a negative pressure to pull the tail against the surface of the supporting member 7. When the widening web 1 and the full-width web after the tail are conveyed it is possible to extend the effective area on the entire width of the negative pressure area. If the negative pressure zone of the reel-up is only narrower than the reel-up for example at the other edge of the reel-up, the shell of the reel-up must be air permeable only within this width.

The blowing F2 directed outside from the inside of the loop of the sup- porting member 7 can also be utilized for other purposes than for facilitating the loosening of the web 1. One advantageous effect of the blowing is its effect on the cleanliness of the surface of the supporting member 7, because thus the material transferred on the surface of the supporting member can be blown away entirely or partly. The cleanli- ness of the surface of the supporting member, in turn, has an effect on the air permeability of the supporting member, and by means of a clean surface of the supporting member it is possible to implement a suction effect that can be better controlled.

The preceding examples disclose different embodiments of a negative pressure arrangement in a reel-up. By maintaining the basic idea of the invention it is possible to place the different elements of the negative pressure arrangement in various ways. Typically the blowers 11 are placed outside the loop formed by the supporting member 7 of the reel- up, and the air flow is guided by means of channels from the blower to a desired location. It is, however, also possible to place certain blower models 11 inside the loop of the supporting member 7.

By combining, in various ways, the modes and structures disclosed in connection with the different embodiments of the invention presented above, it is possible to produce various embodiments of the invention in accordance with the spirit of the invention. Therefore, the above-pre- sented examples must not be interpreted as restrictive to the invention, but the embodiments of the invention may be freely varied within the scope of the inventive features presented in the claims hereinbelow.

Claims

Claims:

1. A method in reeling up, where a paper web is continuously reeled into reels around rotating reeling cores in such a manner that - the web (1) is guided into a reel (3) around a reeling core (4) through a reeling nip (2) between a loop of an endless supporting member (7) and the reel (3), - at least at some stage the reeling core (4) is transferred in relation to the loop of the supporting member (7) in accordance with the growth of the diameter of the reel (3) in such a manner that the position of said reeling nip (2) moves forward on the portion of the endless supporting member (7) carrying the web (1) in the travel direction of said portion, - the force pressing the surfaces of the web (1) and the endless supporting member (7) together and the holding between the web and the supporting member is controlled by means of negative pressure arranged at least on a part of the portion of the supporting member carry- ing the web, characterized in that during the run at least one of the following is changed: the effective area of the negative pressure, the location of the negative pressure, the intensity of the negative pressure.

2. The method according to claim 1 , characterized in that the effective area of the negative pressure is changed in the travel direction of the web (1).

3. The method according to claim 1 or 2, characterized in that the effective area of the negative pressure is changed in a direction transverse to the travel direction of the web (1).

4. The method according to any of the preceding claims 1 to 3, characterized in that the effective area of the negative pressure is changed by transferring a guiding element (12) arranged inside the loop of the supporting member (7) and moving in a stepless manner.

5. The method according to any of the preceding claims 1 to 3, characterized in that the effective area of the negative pressure is changed by controlling the zones (10c) arranged inside the loop of the supporting member (7).

6. The method according to any of the preceding claims, characterized in that the negative pressure is arranged in at least one of the following stages: threading of the web, - primary reeling, secondary reeling reel change, shutdown of the broke processing system.

7. The method according to claim 1 or 2, characterized in that an air flow (F2) is also produced that is directed through the supporting member (7) from inside the loop to the outside.

8. A reel-up, which is arranged to continuously reel a paper web into reels around rotating reeling cores, comprising at least a transfer device (5) for transferring a core (4) and a reel (3) forming around it during the reeling process, where the paper web (1) is guided continuously to the reel via a reeling nip (2), - a loop formed by an endless supporting member (7), containing a portion carrying the web (1) and forming a reeling nip (2), wherein the transfer device (5) is arranged to transfer the reel (3) in the reeling process in such a manner that said reeling nip (2) moves in the travel direction of the portion carrying the web, a first and a second leading roll (8, 9) located inside the loop formed by the supporting member (7), a negative pressure arrangement positioned at least partly inside the loop formed by the supporting member (7) and arranged to produce negative pressure at least on a part of the portion of the supporting member (7) carrying the web (1) and to control the force pressing the surface of the web (1) and the endless supporting member (7) together and the holding between the web and the surface of the supporting member, characterized in that during the run at least one of the following can be adjusted: - the effective area of the negative pressure produced by the negative pressure arrangement, - the location of the negative pressure produced by the negative pressure arrangement, - the intensity of the negative pressure produced by the negative pressure arrangement.

9. The reel-up according to claim 8, characterized in that the effective area can be adjusted in the travel direction of the web (1).

10. The reel-up according to claim 8 or 9, characterized in that the effective area can be adjusted in transverse direction with respect to the travel direction of the web (1).

11. The reel-up according to claim 8 to 10, characterized in that the negative pressure arrangement comprises a guiding element (12) that can be moved in a stepless manner to adjust the effective area of the negative pressure.

12. The reel-up according to any of the preceding claims 8 to 11 , characterized in that the negative pressure arrangement comprises several separately controlled zones (10c) to adjust the effective area of the negative pressure.

13. The reel-up according to any of the preceding claims 8 to 12, characterized in that the negative pressure arrangement is arranged at least partly in a leading roll (8, 9).

14. The reel-up according to any of the preceding claims 8 to 13, characterized in that the negative pressure arrangement is arranged at least partly in the area between the leading rolls (8, 9).

15. The reel-up according to any of the preceding claims 8 to 14, characterized in that the negative pressure arrangement comprises a suction box (10a).

16. The reel-up according to any of the preceding claims 8 to 15, characterized in that the negative pressure arrangement comprises a blow box (10b).

17. The reel-up according to any of the preceding claims 8 to 16, characterized in that it also comprises an air arrangement that is arranged to produce an air flow (F2) directed outward from the outer surface of the supporting member (7).