CN1835884A - Method in reeling up and a reel-up - Google Patents

Abstract

A paper web is continuously reeled into reels around rotating reeling cores. Before a change of reel a new empty reeling core (5) is brought to the change station into change connection with the paper web (W) going to the old reel (R), and when the old reel (R) is full, the web is changed in a change event to travel to the periphery of the new reeling core (5) and a primary reeling is started where the web is guided to form a rell around the reeling core (5) through a reeling nip (N1) between the loop of an endless supporting member (1) and the reeling core. From the primary reeling a change is made to secondary reeling, where a portion of the supporting member (1) carrying the web brings the web to the reel, and the web moves over to the reel in a reeling nip (N) between said portion and the outer periphery of the reel. During the secondary reeling at least in some stage the reeling core (5) is transferred in relation to the loop of the supporting member (1) according to the increase of the diameter of the reel (R) in such a manner that the position of said reeling nip (N) moves forward on the web-carrying portion of the endless supporting member (1) in the travel direction of said portion. A first guide roll (2) of the web-carrying portion of the loop of the endless supporting member (1) is transferred in the direction of the periphery of the reeling core (5) so that the distance of the reeling nip (N1) located between the reeling core (5) and the loop of the supporting member (1) from the first guide roll (2) changes in the primary reeling.

Description

Rewinding method and rewinding machine

The present invention relates to a rewinding method for continuously winding up a web into a roll around a rotating web core. The invention also relates to a rewinding machine arranged to continuously upwind a web into a roll around a rotating web core.

At the end of the paper machine or paper imposition plant, the web, typically several meters wide, which has been produced and/or processed in the pre-processing section, is wound up around a reel to form a machine roll. During this rewinding process, a pivotable pick-up cylinder is typically used to guide the web over the machine roll, wherein the resulting web is controlled by nip contact between the pick-up cylinder and the machine roll. volume quality. A conventional solution is one in which the winding cylinder remains stationary and during winding the reel around which the roll is wound up in nip contact is moved in a support structure, e.g. by supporting the ends of the reel on winding guides . Appropriate loading mechanisms are utilized to influence the ends of the spools to adjust the nip contact between the forming machine roll and the take-up roll. This roll-up concept and related loading methods are disclosed, for example, in Finnish patent 91383 and corresponding US patent 5,251,835, and Finnish patent application 950274 and corresponding US patent 5,690,298.

Another known solution is that in which the reel is arranged to move on a support and the machine roll is rotated with a center drive in a stationary winding station, ie the center of the reel remains in the same position. As the radius of the machine roll increases, the roll-up cylinder moves, causing the frame supporting the roll-up roll to move in the guides. Such an arrangement is known, for example, from European patent application publication 792829 and in the corresponding US patent 5,988,557.

U.S. Patent 5,370,327 discloses a solution in which the roll-up cylinder moves in a vertical direction, whereby the angular position of the nip between the roll-up roll and the machine roll can be changed as the roll moves on the roll-up guide keep constant. The low position of the winding drum and its movement in the vertical direction enable the transfer of the reels from the storage device into the winding station along a straight transfer path. The solution consists of two pairs of rewinding stands, where the pair delivering a machine roll that has already been wound can return past the other pair that is guiding the roll to be rewound, in order to retrieve a new empty reel.

In addition to the fixed reel-up cylinder that guides the web onto the paper roll, according to Finnish patent application 950274 and the corresponding US patent 5,690,298, it is possible to use an auxiliary roller located at a lower position and moving in the vertical direction, which is connected to the The machine roll formed in the moving take-up station forms the second nip. Before switching, the auxiliary roller is in contact with the filling roll, which has left the take-up drum. A corresponding arrangement in connection with switching is disclosed in Finnish patent 91383 / US patent 5,251,835.

Furthermore, a rewinding machine is known from the EP-860391 publication in which the web is guided onto a roll by a belt or wire drawn by means of guide rollers. Thus, a long roll-up nip with uniform pressure is formed in the region of the lower half of the paper roll by means of a belt or a wire mesh. This pressure can be adjusted by tensioning the belt or wire mesh. The belt or wire loop can be tilted in a vertical plane so that the first guide roller in the direction of web travel can be lifted up against the new reel resting on the take-up guide above the belt. As the diameter of the roll increases, the roll moves forward on the rewind guides, keeping it in continuous contact with a downwardly inclined wire or belt which follows the movement of the guide rollers and passes over them. Guide the web onto the roll.

Furthermore, a rewinding machine is known from patent US-5531396 in which a closed loop of the wire mesh is guided on the take-up drum so that it follows the latter to guide the web onto the roll being formed.

A problem with rewinders using wire or belts is switching from winding by a hard nip (using guide rolls) to wire or belt winding when forming the bottom of the roll in the primary winding. This requires the possibility of movement of the primary winding device in both vertical and horizontal directions.

The object of the present invention is to provide a new rewinding method using a belt and a wire mesh, with which the rewinding of the bottom can be better achieved while maintaining the advantages of the existing methods. For this purpose, according to the method of the invention, the first guide roller of the web-carrying part of the closed loop of the annular support member is shifted in the peripheral direction of the web core so that the closed loop between the web core and the support member The distance between the winding nip and the first guide roll changes during preliminary winding. The first guide roller is shifted along the peripheral direction of the reel against the feed direction of the roll paper. Thus, the bottom roll-up can be achieved first by the hard nip and after this transfer by the soft nip. Therefore, there is no need to transfer the scroll during preliminary winding. The present invention also provides a rewinding machine, the first guide roller of which is arranged to be movable along the peripheral direction of the web core in the preliminary winding station so as to be located between the web core and the closed loop of the support member The distance between the winding nip and the first guide roll changes.

For further embodiments of the invention and their advantages, reference is made to the drawings and to the following description.

Below, describe the present invention in more detail with reference to accompanying drawing, in accompanying drawing:

Figure 1 simply illustrates the basic principle of the rewinder in a side view,

Figures 2 to 6 illustrate the different stages of the rewinding process in side views of the rewinder, and

Figures 7 to 11 illustrate the different stages of the rewinding process in side views of a rewinder according to a second embodiment.

Figure 1 illustrates a continuously operating rewinder in which a web W from a preceding section of a paper machine or paper finishing plant travels via a take-up nip N onto a roll R, typically It is several meters wide. The roll-up nip is formed by means of an endless flexible support member 1 such as a belt or a wire mesh. The support member 1 is guided on two guide rollers 2 and 3 at which the movement of the member 1 is converted into the opposite direction. Along the direction of travel of the web, the first guide roller 2 can form a "hard nip" with the roll that starts up in the initial phase of the winding operation, i.e. so that the support member 1 and the roll pass at a certain distance of the member's passage. position, which is supported by the guide roller 2 on the surface of the roller. The latter guide roller 3 or the first guide roller 2 may be a driven roller, ie a pulling roller, or separate drives may be provided for both rollers. The web travels guided by the support member 1 onto a machine roll R formed around a reel 5 which can be rotated with its own central drive. The spool 5 is movable in the machine direction relative to the annular support member 1 and is arranged such that the bearing housings at the ends of the spool 5 which enable rotation of the spool 5 are supported by suitable support structures. With respect to this rewinding machine, there is also a storage device (not shown) for empty reels 5, from where the reels enter a switching station located at the first guide roller 2, in order to switch the web traveling to the machine reel R, At this moment, the paper roll R of this machine is being wound up. The reel switching operation is performed at production speed, ie the web fed at high speed to a full reel is switched to travel on a new reel fed to the switching station.

The machine roll R is transferable in the machine direction in a transfer device 7 supporting bearing bushes at the ends of the reel and moving by means of actuators connected to the frame of the rewinder. The transfer means 7 are arranged to move on substantially horizontal roll-up rails 6 extending in the machine direction and are formed by brackets at each end of the reel shaft supporting bearing housings at the ends of the reel shaft 5 . As the diameter of the machine roll R increases and the roll moves forward, the roll remains in continuous contact with the support member 1, because the transfer path of the transfer device 7 forms a link with the web-carrying portion of the support member 1. The angle of the opening along the transfer direction. In FIG. 1 , the upper, web-carrying part of the annular support member 1 is guided obliquely downwards in its direction of motion, while the transfer path of the paper roll R (and reel 5 ) is substantially horizontal.

Figure 2 illustrates the situation in the early stages of the winding operation, when the reel 5 and the roll R formed around it in the preliminary winding are transferred from the preliminary winding device 8 to the transfer device 7, which acts as a second The level roll-up device is operated. For this purpose, the transfer device 7 is moved to a position close to the preliminary winding device 8 in the direction indicated by the arrow facing the traveling direction of the web. At this stage, the web W travels onto the paper roll R via the part of the support member 1 coming from the first guide roller 2 .

Figure 3 illustrates this situation in which, corresponding to the increase in diameter of the roll R, the transfer device 7 is shifted forward along the roll-up guide 6 in the direction of travel of the web, so that the roll always touches the ring on its bottom side A support member 1 such that the web moves onto the outer periphery of the paper roll R in the roll-up nip N between the web-carrying portion of the annular support member 1 and the outer periphery of the paper roll. The reel 5 forming the core of the new paper roll is fed into a preliminary winding device 8 . FIG. 3 also illustrates a situation when the annular support member 1 has been shifted forward in the machine direction so that the first guide roller 2 is located directly below the new reel 5 . The movement of the first guide roller 2 and the annular support member 1 will be described in more detail below.

Figure 4 illustrates a situation when a new reel 5 is fed into the switching station by vertically lowering the preliminary rewinder 8 and bringing it into alignment with the part of the annular support member 1 running on the first guide roller 2 Contact, in order to form the so-called hard nip. Before this, the new reel 5 has been accelerated to web speed by the drive of the preliminary winding device 8 . In the switching station, the plane connecting the central axis of the reel 5 and the central axis of the guide roller 2 is substantially vertical. Compared to the situation in Figure 3, the old machine roll R in the secondary rewinder has been moved forward corresponding to the increase in the diameter of the roll, i.e. the reel-up nip between the roll R and the annular support member N has moved in the direction of travel of the upper portion of the annular support member. The web W now passes between the new empty reel 5 and the first guide roller 2 of the annular support member and further travels along the upper web-carrying part of the annular support member 1 and in the roll-up nip N is wound around the periphery of the old paper roll R. Figure 4 further illustrates how at this stage the old paper roll R comes into contact with the press roller 9, which is pivotable and rotates with its own drive, the purpose of which is to ensure the density of the roll skin. The nip between the support member 1 and the casing of the new reel 5 through which the web runs is indicated with the reference N1.

Fig. 5 illustrates a situation, at this moment, the roll paper sent to the old paper roll R is switched to travel around the new reel 5, that is, after passing through the nip N1 between the reel 5 and the first guide roller 2, the The web follows the surface of the new reel 5 and begins to form around it a new machine roll R, in this case the aforementioned nip N1 forming the roll-up nip in the preliminary roll-up operation. A switching method not described in further detail here may include a suitable air blowing method whereby the web is broken and guided around the new reel 5 . The switching operation is performed in known manner at full web speed, ie, web production speed. During the switchover, the reel 5 is located in the preliminary winding device 8 .

Figure 5 illustrates how the end of the secondary rewinder for the old paper roll R is located before the second guide roll 3 (position of the nip N). This secondary winding operation can also be continued so that the winding nip N moves all the way to the end of the downwardly inclined portion of the annular support member 1 above the second guide roller 3 .

Figure 6 illustrates a situation where the fully wound old machine roll R has been out of contact with the annular support member 1 and is transferred forward by the transfer device 7 to the removal station, while the pressing roller 9 corresponds to the transfer movement Move so that it maintains continuous contact with the surface of the machine roll R. When the old machine roll R has been removed from the annular support member and a layer of paper thickness has been wound around the new reel 5 in the initial preliminary winding phase, the annular support member 1 faces the feed of the web. The direction is shifted in the manner indicated by the arrow along the peripheral direction of the reel such that the first guide roller 2 is further away from the new paper roll and the peripheral surface of the paper roll is in the free position of the support member 1 following the guide roller 2 Partially abuts against the annular support member, ie the situation is the same as that shown in FIG. 2 at this time. In this phase, the new reel is still located in the preliminary winding device 8 . The turn-up nip N1 thus moves relative to the guide roll 2 along the direction of travel of the support member 1 .

The feeding direction of the web here refers to the direction in which the web enters the roll-up nip between the annular support member 1 and the reel 5 . The web W can thus be guided by the first guide roller 2 (in the manner shown in FIGS. The web guide roll 10 before the annular support member is guided), or it can also enter the nip under the guidance of the reel 5 and the paper layer at the top of the reel, that is, before entering the roll-up nip N1, it is first Guide along the surface of the roll.

When the fully wound roll R is removed from the rewinder, the transfer device 7 can move freely on the guide rail 6 towards the preliminary winding device 8 to the position shown in FIG. The reel 5 in 8 and the roll R starting to be formed around it are fed into the transfer device 7 for secondary rewinding. Then, the secondary winding operation of the new paper roll R is performed again along the upper, roll-carrying portion of the annular support member 1 according to FIGS. 2 to 6 . During this secondary winding operation, the guide roller 2 is shifted again in the direction of travel of the web (from the position in FIG. Where Roller 2 is located.

It is pointed out here that during the entire winding operation, the nip contact with the support member 1 is continuous, that is, when switching from the primary winding to the secondary winding, the nip contact with the annular support member is when the reel 5 is moved from Preliminary winding device 8 is continuously maintained when it is sent into transfer device 7 . The transfer device 7 can start to transfer the reel 5 and the paper roll positively from the fixed position where the reel 5 is held by the preliminary reel 8 at the moment of switching and throughout the preliminary rewinding. When the reel 5 is fed from the preliminary winder 8 to the transfer device 7, the torque supply for rotating the reel 5 can be switched from the drive of the preliminary winder 8 to the drive of the transfer device 7 in a known manner. During the secondary winding operation, the drive of the transfer device 7 moves with the transfer device at the speed required for the production speed and rotates the reel 5 and the roll R around it until, after cutting the web, the full reel has been wound. The paper roll starts to slow down.

Shifting the first guide roller 2 against the feed direction of the web W achieves an advantageous effect, i.e. the periphery of the new paper roll starting to form around the reel 5 against which the annular support member 1, for example a belt or wire mesh, rests. The position can be moved from the guide roller 2 to the free part of the annular support member 1 following the guide roller. In fact this relative movement can be achieved by shifting the reel 5 forward in the direction of transport of the belt loop in the preliminary winding device. However, this situation has the disadvantage that, in the preliminary winding, it will be necessary to guide the movement of the reel shaft 5 whose mass is continuously changing as the web W is wound around it. When operating with the method according to the invention, the central axis of the reel 5 can remain in a fixed position during the transfer phase of the winding nip and even during the entire preliminary winding operation. This in turn enables at least the preliminary winding device 8 to remain stationary, i.e. it can only move along a substantially vertical transfer path, and it is not necessary to provide the preliminary winding device 8 in order to transfer the reel 5 in the direction of the annular support member. Provides the possibility of horizontal movement.

The possibility of movement of the guide roller 2 in the peripheral direction of the winding shaft 5 also has other advantages. When the position of the guide roller 2 can be changed as described above, it is first possible to select that the winding operation of the bottom around the new reel 5 is directly against the hard winding nip N1 (against the first guide roller 2 on the running support member 1) or directly just against the support member 1 (the free part of the support member following the belt guide roller 2) ie against the "soft" roll-up nip N1 . In order to select this starting position, it is not necessary to transfer the reel 5, but it is possible to lower the switching station with the preliminary winding device 8 always following the same transfer path, and the starting position only depends on the fact that the first guide roller 2 has been driven to s position. When the web is switched to the movement of the winding reel 5 in the switching station, the bottom winding operation starts immediately against either the hard nip or the soft nip.

Advantageously, the process is such that, in the initial preliminary winding phase, after the changeover, the bottom of the roll around the reel 5, i.e. the initial web layer, begins to be wound up against the hard nip N1 while This reel 5 remains in the switching station and then starts the second preliminary winding phase by transferring the first guide roll 2 relative to the reel 5, after which the bottom of the roll is wound up against the soft nip N1.

By translating the guide roller 2 in the machine direction, a suitable starting position can be determined at which the guide roller is positioned during the switching and first preliminary winding phase. When the web has been switched and the roll begins to grow around the new reel, the guide roller 2 is moved vertically downwards corresponding to the increase of the roll, and by this movement, also in the first preliminary winding phase The load per unit length of the roll-up nip is adjusted in .

FIG. 1 schematically shows the movement possibilities of the first guide roller 2 and the second guide roller 3 . Advantageously, the first guide roller 2 is displaceable both vertically and horizontally in a direction perpendicular to its axis of rotation, so that the transfer movements in these directions are independent of each other, wherein the The first guide roll 2 determines the position of the winding nip during the preliminary winding operation. Therefore, the first guide roller 2 can be positioned at a precisely selected position in a vertical plane coincident with the traveling direction of the web having a certain size range, and can realize the transition from the first position to the second position through an ideal transfer path. The transfer of two positions. The same movement possibility exists for the second guide roller 3 . In practice, the situation in which both guide rollers move can be achieved by connecting the guide rollers rotatably to the first element, and making them linearly movable in one direction in the aforementioned vertical plane, and then attaching The element is arranged to be linearly movable in a direction perpendicular to the first direction in the same vertical plane. Elements of this type are located on both sides of the guide rollers on the edge of the rewinder.

In the embodiment according to Figures 2 to 7, the entire annular support member 1 should move corresponding to the movement of the first guide roller 2, i.e. the second guide roller 3 should follow the movement of this first guide roller 2, so that the Ideal location for ring support members. This can be achieved in that the axes of rotation of the first guide roller 2 and the second guide roller 3 are connected to each other by means of a rigid connecting body, which is schematically indicated in FIG. 1 by dashed lines. In practice, this movement can be further realized so that each guide roller is movably mounted in height direction into its own carriage, which in turn can be shifted in machine direction in the rewinder frame. Thus, for example, by actively moving the support of the first guide roller 2 and by actively adjusting the height position of the guide roller 2 in the support, the guide roller can always be positioned correctly with respect to the preliminary winding device 8 and the reel 5 therein. in the location. The second guide roller 3 follows the movement of the first guide roller so that the angle of the annular support member with respect to the horizontal plane changes in a desired manner or remains constant. In practice, the movement of the second guide roller 3 should only be actively guided in one direction, and due to this rigid connection, the guide roller will automatically position itself in a direction perpendicular to this direction. For example, when transferring the brackets of the first guide rollers 2 with active actuators, and when adjusting the height position of the guide rollers 2 in the brackets with active actuators of these brackets, in the brackets of the second guide rollers 3 only The height needs to be actively adjusted and the support can automatically follow the movement of the first guide roller 2 in the machine direction via this rigid connection.

This support as one of the controllable variables during primary winding and especially during secondary winding can be achieved, for example, by means of tension rollers movably connected to the joints of the guide rollers and in contact with the annular support member 1 Tension of member 1.

A second possibility of arranging the movement of this annular support member consists in movably arranging the guide rollers 2 and 3 so that they are not connected by a rigid connection that can determine the distance between their center points, but that they can be moved between The annular support members move completely independently of each other within the limits set. The same can be said for the movement possibilities of the two guide rollers, for example they can be moved in the height direction and in the machine direction, but by their mutual movement the tension of the support member 1 can now also be adjusted.

As can be seen from the figures, the preliminary winding device is movable in vertical direction along vertical guides in the rewinder frame, ie the movement is linear. From this frame the pawls of the primary winding device to which the bearing housing of the new reel 5 can be attached are oriented in the direction in which the roll will be transferred during the secondary winding, ie the direction of transfer of the transfer device 7 . This can be done by lowering the preliminary winding device and by holding the first guide roller 2 and the annular support member in the position where they were previously transferred, or by holding the preliminary winding device 8 in place and by raising the first guide roller 2 until the roll The web remains between this support member 1 and the reel 5 to close the nip N1 between the new reel 5 and the support member 1 .

Figures 7-11 illustrate a rewinder in which the stages are substantially the same as those described above. But in addition to the first guide roller 2 and the second guide roller 3 there is also a third guide roller inside the annular support member 1 , a further guide roller 11 which is located in the direction of travel of the web at the first guide roller 2 in front of. At the first guide roller 2, the running direction of the annular support member is not changed to the opposite direction, but the part of the support member 1 leading upward in the oblique direction is transformed into a part leading downward in the oblique direction, and at the same time, the roll-up presses Extent N is transferred in a secondary rollup operation. On the portion directed upwardly in an oblique direction between the further guide roller 11 and the first guide roller 2, the support member 1 conveys the web towards the roll-up nip N1. This additional guide roller can be used to adjust the tension of the support member. Furthermore, on the outside of the annular support member there is provided a roller 12 in contact with the support member 1 , which can be used as a guide roller by which the movement of one end (arrow) can position the support member 1 in the transverse direction.

The advantage of the embodiment in Figures 7-11 is that, when it is necessary to change the mutual position of the guide rolls 2 and the roll-up nip N1 during the preliminary winding phase, only the first guide roll 2 of the guide rolls in the ring needs to be moved, And the other guide rollers can remain in the same position during all stages.

The planar flexible support member 1 forming a closed loop with two or more guide rollers is preferably air-permeable, such as a wire mesh. However, other breathable support members are also within the scope of the invention, such as belts with closed surfaces. The support member has the same structure in the cross-machine direction, ie it corresponds to the width of the web being wound up. However, the scope of the present invention also includes the idea that the closed loop is formed by a plurality of closed loops running next to each other in parallel relationship, while the general geometry in side view is exactly the same as that shown in FIGS. 2 to 11 . In this way, the tension of these closed loops can be adjusted independently, eg according to the principle known from EP-860391.

The preliminary winding device 8 is preferably movable vertically upwards and downwards, in which case, in the upper position, the device fetches a new reel 5 from the storage device, and in the lower position, forms a switching and preliminary winding station. But the preliminary winding device holding the new spool during the switching and preliminary winding phases may be completely fixed in its position. At this point, the new reel is fed into the preliminary winding device from above using a special transfer member such as a lifting device. Therefore, the winding nip N1 should be closed by moving the first guide roller 2 .

Claims (14)

1. backrush method, wherein paper in reel is rolled onto in the paper roll of rotary paper core on continuously, makes:

-before paper roll switches, new blank coil coil paper core (5) is sent into switching station, make itself and the paper in reel (W) of advancing form to switch and be connected towards old paper roll (R),

-when old paper roll (R) when full, in handover event, paper in reel switched to towards the periphery of described new paper core (5) and advances, and begin to carry out tentatively to go up volume, guide paper in reel around described new paper core this moment,

-described preliminary in the volume, the guiding paper in reel by ring-type load-carrying element (1) closed loop and paper core between go up the volume nip and around paper core (5) forming paper roll,

-carry out tentatively being rolled onto the switching that secondary is rolled up from described, the part of the carrying paper in reel of load-carrying element this moment (1) is guided paper in reel into paper roll, and paper in reel between described part and paper roll neighboring on roll up in the nip (N) and move on the paper roll,

-during volume on the described secondary, at least in certain stage, diameter accretion corresponding to described paper roll (R), described paper core (5) is transferred with respect to the closed loop of described load-carrying element (1), make described position direct of travel along described part on the paper in reel bearing part of ring-type load-carrying element (1) of going up volume nip (N) move forward

It is characterized in that, first deflector roll (2) of the paper in reel bearing part of the closed loop of described ring-type load-carrying element (1) can shift along the peripheral direction of paper core (5), makes that the distance that goes up volume nip (N1) and described first deflector roll (2) between the closed loop that is positioned at described paper core (5) and load-carrying element (1) changes during the volume on tentatively.

2. method according to claim 1, it is characterized in that, the peripheral direction in face of the direction of feed of described paper in reel (W) along described paper core (5) shifts described deflector roll (2) during the volume on preliminary, thereby makes the described distance that goes up volume nip (N1) and first deflector roll (2) increase.

3. method according to claim 2 is characterized in that,

-first preliminary on volume in the stage, the position of paper roll on load-carrying element is positioned at first deflector roll (2) that forms around described paper core (5) is resisted against on the load-carrying element (1), and

-second preliminary on volume in the stage, described first deflector roll (2) shifts so that described paper roll is resisted against on described first deflector roll of following closely of load-carrying element (1) (2) the free part afterwards more.

4. according to the described method of each claim of front, it is characterized in that during the volume, described paper core (5) is in a fixed position on tentatively.

5. according to the described method of each claim of front, it is characterized in that, described new paper core (5) is sent into switching station with vertical substantially motion of translation make on its closed loop that is resisted against described load-carrying element (1).

6. according to the described method of each claim of front, it is characterized in that, described first deflector roll (2) and second deflector roll (3) of following thereafter along the direct of travel of described load-carrying element (1) are transferred, and make the position change of closed loop of described load-carrying element (1).

7. method according to claim 6 is characterized in that, in transfer, the motion of described deflector roll (2,3) is determined according to the connector that connects these rollers.

8. according to each described method in the claim 1 to 6 of front, it is characterized in that described deflector roll (2,3) shifts independently.

9. according to each described method in the claim 1 to 5 of front, it is characterized in that described first deflector roll (2) shifts in the closed loop of described load-carrying element (1).

10. back winder, it is set to paper in reel is rolled onto in the paper roll of rotary paper core on continuously, comprising:

-during volume on the secondary, be used to shift described paper core (5) and the transfer device (7) of the described paper roll (R) that forms around paper core (5), wherein described paper in reel (W) is directed on the described paper roll continuously by last volume nip (N),

-be used for new blank coil coil paper core (5) is transferred to the device of switching station, wherein during volume on the secondary, be directed to paper in reel (W) on the described paper roll (R) and be switched to around described new paper core (5) and advance,

-being used for described new paper core (5) is remained on the preliminary device of going up the volume station, wherein bootable described paper in reel centers on described new paper core (5) by last volume nip (N1),

-by the formed closed loop of ring-type load-carrying element (1), wherein has the paper in reel bearing part of rolling up nip (N) on secondary, forming in the volume, described transfer device (7) is set to shifting paper roll during the volume on the described secondary, make described upward volume nip (N) move along the direct of travel of described paper in reel bearing part

-being positioned at first deflector roll (2) of described closed loop inboard, described roller is rolled up the original position of the described paper in reel bearing part of nip (N) and is located along the direct of travel of described load-carrying element (1) on forming,

It is characterized in that, described first deflector roll (2) is set to and can moves along the preliminary peripheral direction of going up the described paper core (5) in the volume station, and makes the distance that goes up between volume nip (N1) and first deflector roll (2) between the closed loop that is positioned at described paper core (5) and load-carrying element (1) change.

11. back winder according to claim 10 is characterized in that, the axis of described first deflector roll (2) can move linearly along machine direction at least.

12. back winder according to claim 11 is characterized in that, the axis of described first deflector roll (2) all can linearly move on machine direction and short transverse, and its transfer movement is separate.

13. according to each described back winder in the claim 10 to 12, it is characterized in that, described switching station is same with preliminary upward volume station and winding apparatus (8) realization is tentatively gone up in utilization, and described preliminary upward winding apparatus (8) is set to described new paper core (5) to be remained on described switching station and tentatively goes up and roll up in the station.

14. back winder according to claim 13 is characterized in that, makes the described preliminary winding apparatus (8) of going up be set to and can move along vertical direction substantially on the back winder framework by linear guide apparatus.

Images