FI117552B - Method of rolling and unrolling device - Google Patents

Abstract

Before a reel change a new core ( 5 ) is brought to a change station. When the old reel (R) is full, the web is changed to travel to the new core periphery and primary reeling beings. The web forms a reel through a reeling nip (N 1 ) between the loop of an endless supporting member ( 1 ) and the core. A change is made to secondary reeling, where a portion of the supporting member ( 1 ) brings the web to the reel, to move over to the reel in a nip (N) between said portion and the reel outer periphery. The core ( 5 ) is transferred so the nip (N) moves forward. A first guide roll ( 2 ) is transferred towards the core periphery so the distance of the nip (N 1 ) located between the core ( 5 ) and the loop of the supporting member ( 1 ) from the first guide roll ( 2 ) changes in the primary reeling.

Description

117552

Method of winding and reel

The invention relates to a method of winding of the type shown in the preamble of claim 1. The invention also relates to a reel winder of the type shown in the preamble of claim 10.

At the end of the paper machine or paper finishing apparatus, a paper web manufactured and / or processed in the previous machine parts, usually several meters wide, is rolled into a machine reel around a reel roll. In this winding, a rotating roller cylinder is usually used to guide the paper web to the machine roll, whereby the nip contact between the winding cylinder and the machine roll affects the quality of the resulting roll. A conventional solution is one in which the winding cylinder is pressed and the reel roll around which the reel grows in a nip contact is moved as the reeling progresses in the support structure, for example by supporting the ends of the reel roll with the reeling rails. The ends of the spool reel are actuated by a suitable loading mechanism to adjust the nip contact between the resulting machine roll and the winding cylinder. Such roll-20 concepts and the associated loading methods are disclosed, e.g. in Finnish Patent 91383, corresponding to US Patent 5,251,835, and in Finnish Patent Application 950274 and the corresponding US Patent ···. tissa 5,690,298.

In addition, there is known a solution in which the winding cylinder is arranged to be movable in a carriage and the machine roll is rotated by a center drive in a fixed winding position, i.e. the center of the reel roll remains the same. Machine Roll: ···: As the radius increases, the roller cylinder moves so that the carriage supporting it moves in the guide. Such an arrangement is known e.g. European Patent Application Publication No. 792829, corresponding to U.S. Patent No. 5,988,557.

In US Patent No. 5,370,327, X # discloses a solution in which the winding cylinder is "* vertically displaceable, thereby enabling the angle of the nip between the winding cylinder and the machine. Keep the position constant as the roll rolls | ·: ··: With roller rails The low position and vertical movement of the roller cylinder allows the reel rolls to be moved from storage to the roller position along a straight 117552 2 transfer paths, with two pairs of roller carriages to pick up a new empty reel reel.

In addition to the stationary winding cylinder which guides the web to the roll, according to Finnish patent application 950274 and the corresponding US patent 5,690,298, a lower, vertically displaceable auxiliary roll which forms a second nip with the machine winding station can be used. Prior to replacement, these 10 auxiliary rollers are in contact with a fully loaded roll which has been released from the reeling cylinder. A similar arrangement in connection with an exchange event is disclosed in Fl patent 91383 / US patent 5,251,835.

Also known from EP-860391 is a roller, in which the web is guided to 15 rolls through a belt or wire passed through guide rolls. This allows a belt or wire to provide a long winding nip in the region of the lower half of the roll with uniform pressure. The pressure can be adjusted via belt or wire tension. The belt or wire loop can be tilted vertically so that, in the direction of web travel, the first guide roll 20 can be lifted against a new reel roll resting on the winding rails above the belt. As the roller grows, the roller moves forward. . *. on flat rails so that it is in continuous contact with the guide roll. ···. a downward slope of a scraping wire or belt through which. *: ·. the web will roll.

ϊ .; 25!: *: * Patent US-5531396 also discloses a reel having a wire loop! • · * passed over the winding cylinder so that it deflects after the winding cylinder: ···: the web to a forming roll.

• V 30 The problem with wire or belt rewinders is the transition from a hard nip (with a guide roll) to a wire or belt rewind only when forming the bottom of the reel in primary winding. This • · · requires the motion rewinder to move both vertically and horizontally - **: * '.

: * ·· 35 *: · *: It is an object of the present invention to provide a novel belt or wire winding method which allows the bottom winding to be better accomplished, while providing the advantages of known methods. To accomplish this purpose, the method according to the invention is essentially characterized in what is set forth in the characterizing part of the appended claim 1. The first guide roll is moved in the direction of the circumference 5 of the reel roll against the upstream direction of the web. In this way, it is possible to roll the bottom initially with a hard nip and after transfer with a softer nip. You do not need to move the reel spool during the initial rewinding.

The reel winder according to the invention, in turn, is characterized by what is disclosed in the characterizing part of the appended claim 10.

For other embodiments of the invention and their advantages, reference will be made to the following dependent claims and the description which follows.

The invention will now be described in more detail with reference to the accompanying drawings, in which Fig. 1 schematically shows a side view of the main principle of the reel, Figs. 7-11 illustrate the various steps of the rewinding as a side view of a second embodiment of a * * * 25 don roller.

Figure 1 shows a continuous reel, in which a paper web W from a preceding portion of a papermaking or paper finishing apparatus, which is normally several meters wide, passes through a reeling nip N i '\: 30 to a reel R. The reeling nip is formed in an endless loop by a flexible support member 1 such as a belt or wire. The tongue 1 is passed through two guide rollers 2 and 3, at each of which the flow of the member 1 turns in the opposite direction. In the direction of travel of the web • · **: **, the first guide roll 2 may form a "hard nip" to start the roll in the initial step, so that the support member ·: ··: 1 is in contact with the roll where it passes the support roll afloat. The latter guide roll 3 or the first guide roll 4 117552 2 may be a drive roll, i.e. a drive roll, or each roll may be provided with its own drive. The web passes, guided by the support member 1, on a machine roll R formed by its own center drive around a rotatable reel spool 5. The reel roll 5 has the possibility of movement in the machine direction 5 with respect to the loop of the support member 1 and is arranged so that the bearing housings at the ends of the reel roll which allow rotation of the reel roll 2 are supported by suitable support structures. The reel also has a storage (not shown) of empty reel rolls 5, from which the rolls are brought to a replacement position at position 10 of the first guide roll 2 for changing the web going to the fully reeling machine roll R. The roll change takes place at the production speed, that is, at high speed, the paper web, which goes to the full roll, is changed to run on a new, reel-fed reel.

The machine roll R can be moved in the machine direction by a transfer device 7 which supports the bearing housings at the ends of the reel roll and is moved by actuators mounted on the reel body. The transfer device 7 is arranged to move on machine-oriented, substantially horizontal winding rails 6, and consists of a carriage at each end 20 of the reel roll which carries the bearing housing of the end of the reel roll 5. As the diameter of the machine roll R increases and the roll moves forward, it is continuously in contact with the support member 1 due to the combination of the transfer path 7 of the transfer device 7 and the web carrying the web member of the support member 1: In Fig. 1, the upper web carrying portion of the loop * φ * 25 of the support member 1 is inclined downwardly in its direction of travel with the transverse path of the roll R (and the reel roll 5) being substantially horizontal.

• · *

Fig. 2 illustrates the situation during the initial winding in a situation, where the reel R formed during the initial winding is moved from the initial winding device 8 to the transfer device 7, which acts as a secondary winding device. The transfer device 7 is driven to this end the direction of arrow T • · in the direction indicated by the direction of travel of the web alkurullauslait I-8 position. At this point, the web W passes through a portion of the support member 1 coming after the first guide 35 roll 2 to a roll R.

• · 117552 '5

Fig. 3 illustrates a situation in which the transfer device 7 is moved forward along the winding rails 6 in the direction of web travel as the diameter of the roll R increases, so that the web is always below its contact with the loop of the support member 1 a reel core 5 forming a new reel core is introduced into the start winder 8. Figure 3 also shows a situation where the loop of the support member 1 is moved forward in the machine direction so that the first guide roll 2 is directly below the new reel 10 yarn 5. The movements of the first guide roll 2 and the loop are described in more detail below.

Fig. 4 shows a situation in which the new reel reel 2 is brought into contact with the part of the loop of the support member 1 which passes over the first guide roll 2 so-called by lowering the starter winder 8 vertically down. for a hard nip. Prior to this, the new spool reel 5 has been accelerated to the web speed by actuation of the initial winding device 8. In the replacement position, the plane connecting the central axis of the reel roll 5 and the central axis of the guide roll 2 is substantially vertical. Compared to the space-20 tee of Figure 3, the old machine reel R has shifted further in the secondary winding as the diameter of the reel increases, i.e. the reel nip N between the reel R and the tu tongue loop has shifted in the upward direction of the · · * ··; The paper web W now passes between the new, empty tamv: drum roll 5 and the first guide roll 2 of the loop and further along the upper web carrying portion of the loop of the support member 1 and moves around the old roll R in the winding nip. 4 further shows how, at this point, the old roller R has come into contact with a press roll 9, which is rotatably mounted on the roller body and is self-rotating to secure the roller surface layers! * · * ·. 30 tightness. The nip through which the web passes between the support member 1 and the sheath of the new reel roll 5 · is denoted by N1.

• · · * «· • · * • · ·

Figure 5 illustrates a situation where the web y going to the old roll R is. The m has been changed to pass around a new reel roll 5, i.e. after the nip N1 between the reel roll 5 and the first guide roll 2, the web follows. · ”* Scratches the surface of the new reel roll 5 and begins to form a new machine roll R around it, whereby the aforementioned nip N1 forms a winding nip in the initial 117552 6 winding. The replacement methods not described in more detail here may include suitable air blows to cause the web to rupture and be guided around the new spool roll 5. The changeover is known to be performed at full web speed, i.e. web production speed. The spool reel 5 is in the start winder 8 during replacement.

Figure 5 shows how the end of the secondary winding of the old roll R is before the second guide roll 3 (position N of the nip). It is also possible to continue the secondary winding so that the winding nip N moves to the end of the downwardly inclined portion of the loop 10 of the support 10 on the second guide roll 3.

Fig. 6 illustrates a situation in which the old, full machine roll R is moved by the transfer device 7 forward to the outlet position out of contact with the tongue 1 loop as the press roll 9 moves in accordance with the transfer movement so that it is in continuous contact with the machine roll R. When the old machine reel R has been transferred off the support member from the loop and the rai-NAA has accumulated the new reel spool 5 around a thick layer of the first alkurullausvaiheessa, the support member 1 meshes MOVE-20 unloaded from the arrow indicated by the reel spool in the circumferential direction of the web against the direction of arrival, the first guide roll 2 moves further away from the new from the roll, and the peripheral surface of the roll comes into contact with the loop • # · the guide roll 2 immediately following the free portion of the support member 1, i.e.: T: is the same as Figure 2. The new reel roll 25 is at this step still in the start rewinder 8. the direction of travel.

• · • * · • · · ·

By the direction of web entry, here is meant the direction in which it enters the winding nip between the loop of the tongue 1 and the reel 5. Raina W

30 may then be guided either by the first guide roll 2 by the portion of the loop of the supporting member which curves over the guide roll 2 (as shown in Figures 4-6, where the web entry into the loop is guided before the loop: ***: web guide roll 10 ), or it can also come into the nip controlled by the spool roll 5 * * * and the layers of webs over it, that is, it is first guided through 35 surfaces of the reel before entering the reeling nip N1.

··· # 117552 7

When the full roll R is removed from the roll, the transfer device 7 is free to move along the rails 6 toward the start rewinder 8 to the position of Figure 2 where the reel R 5 formed in and around the start rewinder 8 is delivered to the guide 7 for background. The secondary winding of this new roll R then proceeds again along the upper web-carrying portion of the loop of the support member 1 as shown in Figures 2-6. During secondary winding, the guide roll 2 is again moved back in the direction of travel of the web (from position 2 to position 3), that is, where it is again brought into the new reel roll 10.

It should be noted that the nip contact with the support member 1 is continuous throughout the winding, i.e., during transition from initial winding to secondary winding, the nip contact with the support member loop is maintained at all times when the reel roll 5 15 is released from the start winder 8 to the transfer device 7. from the position where the reel winder 8 has held the reel roll 5 at the time of change and throughout the initial reel. When the spool reel 5 is released from the start rewinder 8 to the transfer device 7, the change of torque rotating the reel roll 5 from the start rewinder 8 to the drive 7 can be accomplished in known ways. The drive of the transfer device 7 is carried along with the transfer device and rotates the reel roll 5 and its roller R * at the speed required for the production speed during the reel winding until, after cutting the web, the full roller is lowered.

It »• · · * ·» • ·! ···. By displacing the first guide roll 2 against the upward direction of the web W, the advantageous effect is obtained that the point at which the support member 1, ... as the loop of the belt or wire is against the periphery of the new reel which has begun to form around the reel roll 5, it moves to the free portion of the subsequent support member 1 from the guide roll 2. In fact, the same relative displacement would be achieved by moving the reel roll 5 in the starter in the conveying direction of the belt loops. The drawback, however, is that in this case it is necessary to: 35 in the initial winding control the movement of a reel roll 5 whose mass is constantly changing due to the web W surrounding it. When operating the method according to the invention, a reel 117552 8 can be used

The central axis of the Ian 5 is held in place during this rollover nip move and even during the initial roll. This, in turn, allows the initial winding device 8 to be stationary in position so that it is movable along only one substantially vertical transfer path, but without having to be provided with horizontal motion to move the reel roll 5 in the direction of the support member loop.

The possibility of movement of the guide roll 2 in the circumferential direction of the reel 5 has other advantages. When the position of the guide roll 2 is adjustable as described above, one can first choose whether to start the bottom winding around the new reel roll 5 immediately against the hard winding nipple N1 (against the support member 1 on top of the first guide roll 2) or immediately To select this starting position, it is not necessary to move the reel reel 5, but to lower it to the changing position with the starting reeling device 8, always along the same travel path, and the starting position depends only on the position of the first guide roll 2. to run on the 20 reel spool rolls 5, the bottom winding is immediately started either against the hard nip or the soft nip.

Preferably, after the change, after the change, the first t-roll step starts to roll the bottom of the roll, i.e. the first web layers, around the reel roll 5 against the hard nipple N1 while the reel 5 remains in the exchange position, and then move on to the next one. * ···. by moving the first guide roll 2 with a reel relative to the roll 5, after which the bottom is rolled against the soft nipple N1.

* · '' 30 ··· • »* ·“ 'Moving the guide roll 2 in the machine direction retrieves a suitable starting point where:: [z the lead roll is during the changeover and the first start-up phase. When the web has been replaced and the roll begins to grow around the new reel roll, the ·· »guide roller 2 is moved vertically downward as the roll increases, and this movement also controls the line loading of the reel nipple.

in the fastest initial rewind phase.

Π7552 9

Figure 1 shows schematically the movement possibilities of the first guide roll 2 and the second guide roll 3. The first guide roll 2, by means of which the position of the winding nip can be determined in the initial winding, is preferably movable both vertically and horizontally perpendicular to its axis of rotation so that the displacements in these directions are independent. In this way, the guide roll 2 can be positioned at a precisely selected point in a vertically congruent web in a region of a certain size, and the transfer from the first point to the second point can be effected along the desired transfer path. The same possibility of movement is also provided by the second guide roll 3. In practice, the movement for both guide rolls can be accomplished by fastening the roll rotatably to the first element and movable therein in one direction perpendicular to the above vertical plane. Such an element is located at each end of the roll at the edge of the reel.

In the embodiment of Figures 2-7, the entire loop 20 1 of the support member 1 must move in accordance with the motion of the first guide roll 2, i.e. the second guide roll 3 must follow the movement of the first guide roll 2 so that the desired loop position is maintained. This can be accomplished such that the rotational axes of the first guide roll 2 and the second guide roll 3 are connected by a rigid connecting frame, schematically illustrated by a dot break, ···. 25 in Figure 1. In practice, the movements can still be carried out so that each of the guide rolls is positioned vertically movable in its own carriage, which in turn can be moved machine-direction on the roller ** · * diluent body. Thus, for example, by actively moving the carriage of the first guide roller 2 and actively adjusting the height of the guide roller 2 in the carriage, the guide roller is always positioned in the correct position with respect to the start winding device 8 and the reel 5. To-. . ·. the guide roll 3 follows the movement of the first guide roll so that the support member ···. the angle of the loop of the menus with respect to the horizontal plane changes as desired, or • · * · * remains constant. In practice, the movement of the second guide roll 3 needs to be actively: * ·· 35 guided in one direction only, and the roll is automatically positioned in a direction perpendicular to it, thanks to a rigid coupling body. For example, when moving the wagons of the first guide roller 2 with active actuators and adjusting the height of the roll 2 in the wagons by the active actuators of these wagons, the wagons of the second roll 3 need only actively adjust the height and the wagons automatically follow the first 5 rolls.

The tension of the support member 1, which is one of the control variables during the initial winding, and in particular the secondary winding, can be implemented, for example, by a tensioning roll movably secured to the roller body which is in contact with the eyelet of the support member 1.

Another possibility of arranging the loop movement of the support member is to arrange the guide rolls 2 and 3 so that they are not interconnected by a rigid connecting body defining the distance between their centers 15, but are completely independently movable within the limits defined by the loop. The motion possibilities on both rollers may be the same as above, i.e. they are movable both in the height direction and in the machine direction, but their mutual movement can now also be used to adjust the tension of the support member 1.

20

As shown in the figures, the initial winding device is movable vertically: along the vertical guides on the reel body, i.e. the movement is linear. The locking jaws of the starter rewinder, to which the new spool housings of the new reel roller 5 can be attached, are oriented from this body to it ···. 25 to which the roll is to be moved during the secondary winding, i.e. the transfer • direction of the transfer device 7. The nipple N1 between the loop of new reel 5 and support member 1 can be closed by lowering the initial rewind device ** ·· * and holding the first guide roll 2 and the support member loop in the position to which it has previously been moved, or by holding down: device 8 in place and lifting the first guide roll 2 while the web is between the support member 1 and the reel roll 5.

• · · * · ·. · * ·. Figures 7-11 show a roller with substantially the same steps as described above. However, in addition to the first guide roll 2 and the second guide roll 2, there is a third roll inside the loop of the support member 1, an additional roll 11 located in the web running direction before the first guide roll 2. At the first guide roll 2 11 the direction of the loop does not change. but at this point the obliquely upward portion of the support member 1 turns obliquely downwardly along which the winding nip N moves in the secondary winding. At an oblique-up portion 5 between the auxiliary roller 11 and the first guide roller 2, the support member 1 conveys the web towards the winding nip N1. An additional roller can be used to adjust the tension of the support member. Also shown is a roll 12 in contact with the support member outside the loop, which can be used as a guide roll which locates the support member 1 sideways by the movement of its other end (arrows).

10

An advantage of the embodiment of Figures 7-11 is that of the rolls inside the loop, only the first guide roll 2 needs to be moved to change the relative position of the guide roll 2 and winding nip N1 during initial winding, and the other rolls can be at the same weight.

The planar flexible support member 1, which forms a loop closed by two or more rollers, is preferably air permeable, for example a wire. However, support elements which are impermeable to air, for example belts with a closed surface, are also within the scope of the invention. The support member has the same structure across the machine, i.e. it corresponds to the width of the web to be rolled. However, it is also within the scope of the invention that the loop is formed by a plurality of loops running parallel to each other t · ·, with the general geometry seen from the side being the same as in Figures 2-11. Here, for example, the tension of the loops can be independently adjusted according to the principles known in EP-860391.

* · • · ***

Preferably, the starter winding device 8 is movable up and down vertically, whereby in the upper position it retrieves a new reel reel 5 from the storage and in the lower position forms an alternate and initial winding position. It is, however. ! ·. it is possible that the start winding device which holds the new reel reel during the change and start winding step is completely stationary. In this case, a new reel reel of * * * "is introduced by special transfer means, for example a crane, • ·: '· * 35 to the start winding device from above. In this case, winding nip N1 must be closed by moving the first guide roll 2.

Claims (14)

117552 12 A method for winding continuously rolling a paper web into rolls around a rotating roll core, such that, before the roll is changed, a new, empty roll core (5) is brought into a replacement position with the paper web (W) going to the old roll (R), (R) when the web is full, the web is changed during the changeover to pass around the periphery of the new winding core (5) and an initial winding is initiated, the web being guided around the new winding core, the web being rolled around the winding core (5) - from the initial winding to the secondary winding, in which the rib-carrying portion of the support member (1) introduces the web to the roll and the web is rolled on the winding nip (N) between said portion and the periphery of the roll; the roll (R) of the support member (1) relative to the loop according to an increase in diameter such that the position of said winding nip (N) moves 20 along the web-carrying portion of the endless support member (1) in the direction of travel of said portion, characterized in that the end web of the endless support member (1) * · ·. moving the first guide roll (2) of the carrying portion is moved to the winding core. (5) circumferentially such that the distance of the winding nip (N1) between the winding core (5) and the support member (1) from the first guide roll (2) is changed during initial winding. • * · * · I Φ t Method according to claim 1, characterized in that during the initial winding, the guide roll (2) is displaced in the direction f: 30 of the winding core (5) against the upward direction of the paper web (W) so that the distance from the first guide roll (2) ♦ · · Method according to Claim 2, characterized in that the roll formed around the * · '·: ** winding core (5) is in the first: »35 initial winding step against the support member (1) at a position where the support member is *: * ·: 2) on, and 13 117552 - in the second initial winding step, the first guide roll (2) is moved so that the roll comes more against the free portion of the support member (1) immediately following the first guide roll (2). Method according to one of the preceding claims, characterized in that the winding core (5) is in place during the initial winding. A method according to any one of the preceding claims, characterized in that the new winding core (5) is brought into the exchange position against the loop of the support member (1) in a substantially vertical motion. Method according to one of the preceding claims, characterized in that the first guide roll (2) and the second guide roll (3) following it in the running direction of the support member (1) are displaced such that the position of the loop of the support member (1) is changed. Method according to Claim 6, characterized in that the movement of the guide rolls (2, 3) is determined by the frame connecting the rolls. 20 A method according to any one of claims 1-6,. characterized in that the guide rolls (2, 3) are displaced independently. t ·· * · · * · • · '.V.t Method according to one of the preceding claims 1 to 5, characterized in that the first guide roll (2) is displaced within the loop of the support member (1) • · * ·· **. · · · · · · · · · · · A roller arranged to continuously roll the paper web in rolls around the rotating reel cores, comprising: a transfer device (7) for moving the reel (***) around the reel core (5) during the secondary winding, wherein the paper web (W) e \ # rolls continuously through the scrolling nip (N), * :: f - for moving a new, empty scrolling core (5) to a changeover position, wherein the paper web 35 (W) directed to the secondary winding roll (R) is changed to pass a new winding core (5), • · 117552 14 - a device for holding a new winding core (5) in an initial winding position with a paper web being guided around the new winding core (5) via a winding nip (N 1), a rib-carrying portion forming a reeling nip (N) in the secondary winding, wherein the transfer device (7) is arranged to move the reel in the secondary winding in that the winding nip (N) moves in the direction of travel of the web-carrying portion, - a first guide roll (2) within the loop located at the beginning of the portion of the winding nip (N) carrying the rib, in the direction of travel of the support member (1) the first guide roll (2) being arranged to be moved around the periphery of the winding core (5) in the initial winding position. , ': r in such a way that the distance between the winding nip (N 1) of the loop of the winding core (5) and the support member (1) from the first guide roll (2) is changed. A retractor according to claim 10, characterized in that the axis of the first guide roll (2) is displaceable linearly at least in the machine direction. 20 A retractor according to claim 11, characterized in that. the axis of the first guide roller (2) is linearly displaceable as well. in machine direction and in vertical direction by independent movements. • · ψ • * * * - '25 A rewinder winder according to any one of claims 10 to 13, characterized in that the change station and the start winding station are the same and are implemented by an imaging device (8) arranged to hold the new winding core (5) in the change position and the start winding position. : * · *: 30 • ·; ** ·; A winder according to Claim 13, characterized in that the starter winding device (8) is arranged to move substantially vertically to the winder body by means of linear guides. ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ · • * 117552 15