FI117429B - Method in a rewinder and a rewinder - Google Patents

Description

117429

METHOD ON FIXED ROLLER AND FIXED ROLLER

The invention relates to a method of winding continuously rolling a web of paper around rollers rotating in rolls, such that the web is rolled around a roll core through an endless loop of a support member and a roll between a roller and at least at some point that the position of said winding nip is moved forward by a web-carrying portion of the endless support member in the direction of travel of said portion, and the compression force and grip between the web and the endless support member are controlled by vacuum applied to at least a portion of the support member web. The invention also relates to a reel arranged to continuously roll a paper-web to rolls around a rotating reel core, comprising at least a transfer device for moving the reel core and a roll formed therebetween while the paper web is continuously rolled on the web by a web a portion forming a winding 20 nip, wherein the transfer device is arranged to move the winding roll so that said winding nip moves in the direction of travel of the portion carrying the web, and a guide arrangement within the loop formed by the support member; disposed at least partially within the loop formed by the support member, and arranged to form a vacuum of at least a portion of the web member supporting the web, cutting the surface of the web and the endless support member for controlling the seated force and the grip between the web and the surface of the support member.

• ·

At the end of the paper machine or paper finishing apparatus is rolled: 30 webs of paper produced and / or processed in the previous machine parts, usually several meters wide, into a machine reel around a reel roll. Here. ···. the winding roller usually uses a rotating roller roller to guide the paper web to the machine roll, whereby the nip contact between the roller • · and the machine roll affects the quality of the 35 rolls produced. A conventional solution is where the reel cylinder is in place and the reel roll around which the reel grows in nip contact is displaced as the reel advances in the support structure, for example, by supporting the ends of the reel reel with the reel 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 winding concepts and the associated loading methods are presented e.g. Finnish Patent No. 5,913,883, corresponding to U.S. Patent No. 5,251,835; and Finnish Patent Application No. 950274, and the corresponding U.S. Patent No. 5,690,298.

Further, there is known a solution in which the winding cylinder is arranged in a movable carriage and the machine reel is rotated by a hub drive in a fixed winding position, i.e. the center of the reel roll remains the same. As the radius of the machine roll increases, the winding cylinder moves so that the carriage supporting it moves in the guide. Such an arrangement is known e.g. European Patent Publication No. 792829, which is the subject of US Patent 15 5,988,557.

U.S. Patent No. 5,370,327 discloses a solution in which the winding cylinder is vertically movable, thereby enabling the angle of the nip between the winding cylinder and the machine roll to be kept constant as the roll moves on the winding rails. The low position and vertical movement of the reel roller allows the reel rolls to be moved from storage to the reel position along a straight *: **: roller path. The solution consists of two pairs of reeling carts, from which a pair of full machine reels can return past another pair of reels to retrieve a new empty reel reel.

Li 25

In addition to the stationary winding cylinder guiding the web to a roll, according to Finnish Patent Application 950274 and the corresponding U.S. Patent No. 5,690,298, a lower vertically movable auxiliary roll forming a second nip with the machine roll can be used. Prior to replacement, this [[[] · auxiliary roller is in contact with a fully loaded roll which has been released from the winding cylinder. A similar arrangement in connection with the changeover operation is disclosed in Fl patent 91383 / US patent 5,251,835.

35 is also known from EP-860391, in which the web is guided ·: *: by a belt or wire passed through guide rolls. This provides a belt or wire in the lower half of the reel region 3 117429 a long winding nip with constant 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 can be lifted against a new reel roll resting on the winding rails above the belt 5. As the roller grows, the roller moves forward on the roller rails so that it is in continuous contact with a downwardly sloping run of the wire or belt following the guide roller, through which the roller rolls onto the roller.

US Patent No. 5,531,396 further discloses a roller in which a wire loop is passed over a winding cylinder so that it guides the web to a forming roll after the winding cylinder.

The problem with wire or belt driven reels is to introduce the web into 15 wire or belt loops. The web is introduced, as disclosed in EP-860391, at the point where the wire or belt curves over the first guide roll. Here, the problem is the unevenness of the contact between the web and the loop, especially when the end of the web is brought to the reel.

20

The main object of the present invention is to provide a method of controlling the contact between a web and a web or belt loop of a web:

To accomplish this, the method according to the invention is characterized in that at least one of the following is changed during driving: the area of action of the vacuum, the location of the vacuum, the strength of the vacuum. The reel winder according to the invention, in turn, is mainly characterized in that the * * i.i! At least one of the following can be adjusted during the 30 runs: vacuum effect area of the vacuum arrangement, position of the vacuum formed by the vacuum arrangement,) The strength of the vacuum. In this case the track tension can be controlled within the limits of grip.

«• · 4 117429

Other dependent embodiments disclose certain preferred embodiments of the invention.

In the method of the invention, the pape-5 web is continuously wound into rolls around the rotating winding cores such that the web is rolled around the reeling core through an endless loop of support member and a roller, and at least at some point forward-10 with a web-carrying portion of an endless support member in the direction of travel of said portion. The clamping force on the surfaces of the web and the endless support member and, at the same time, the grip between the web and the support member is controlled by the vacuum applied to the contact between the support member surface and the web. Preferably, at least a portion of the vacuum flow 15 generated by the vacuum flows from the outside of the loop of the support member, but in some preferred embodiments, a portion of the air flow flows from the inside of the loop of the support member.

In a preferred embodiment, at least part of the vacuum ai-20 is obtained by aspirating air inside the loop of the support member, for example, by means of a suction box or by blowing air inside the loop with a blower box.

Λ * *

The vacuum pressure of the reel according to the invention can be advantageously applied in various stages of winding, such as, for example, threading of the web, ... initial winding, secondary winding, roll change and / or shutdown of the wreck handling system.

• · • ♦ ·· ♦

The method according to the invention acts on the compressive force of the surfaces of the web and of the endless supporting member and at the same time on the grip between the surfaces of the supporting member of the web. For example, by raising the under. ···. increasing the pressure in the suction flow increases the friction and / or grip between the track and the support member surfaces.

* * 35 In one embodiment of the method according to the invention, the "**: possible snap of the web or particle web on the rewinder is eliminated, which in turn has a beneficial effect on the winding result.

In a preferred embodiment, it is possible to adjust the force of the nip 5 without affecting the tension of the web.

Versatile adjustments allow for optimum roll-up of different materials as well as rolls of different rolls. The invention is particularly suitable for winding paper types which are substantially air-impermeable, such as coated papers, but may also be used for winding paper-permeable paper types, whereby a vacuum may cause airflow through the paper and support member.

The invention will now be described in more detail with reference to the accompanying principal drawings, in which Figure 1 schematically shows a side view of the main principle of the reel, and Figures 2 to 6 show some embodiments of the vacuum roller arrangement of the reel.

• *

For the sake of clarity, the drawings show only an understanding of the invention. the details needed for it. Unnecessary to the understanding of the invention, but not obvious to one skilled in the art, structures and details will be omitted in order to emphasize the features of the invention.

M * • «

Figure 1 illustrates a continuous reel of paper with a paper web 1 of a width of normally several meters coming from 30 parts of a paper machine or paper finishing apparatus, which passes through a winding nip 2. · * ♦. The roll nip 2 is formed by a flexible support member 7 in the form of an endless loop, such as a belt or wire. The support member 7 is passed through two guide rollers 8 and 9, at which at the manhole of the O-35 the support member 7 runs in the opposite direction. : ··! In the direction of travel of the web 1, the first guide roll 8 may form an initial "roll" with the roll 3 to be started, so that the support member 7 is in contact with the roll at a point supported by the guide roll 8. on its surface. The latter guide roll 9 or the first guide roll 8 may be a driven roll, i.e. a draw roll, or each roll may be provided with its own drive. The web 1 passes through a guide member 5 of a support member 7 to a machine roll 3 formed by its own center drive around a rotatable reel roll 4. The reel spool 4 has the possibility of movement in the machine direction with respect to the loop of the support member 7 and this is arranged so that the bearing housings at the ends of the reel reel allowing rotation of the reel spool 4 are supported in suitable support 10 structures. In addition, the reel has a depot (not shown) of empty reel rolls 4, from which the rolls are brought to a replacement position at the first guide roll 8 to replace the web 1 entering the fully-loaded machine roll 3. The roll change takes place at the production speed, that is, at high speed, the paper web 1 which reaches the full roll 3 is replaced with a new spool reel 5 introduced in the traveling country, rotated at its peripheral speed corresponding to this speed.

The machine roll 3 can be moved in the machine direction by a transfer device 5 which supports the bearing housings at the ends of the reel roll 4 and is moved by actuators mounted on the reel body. The transfer device 5 is arranged to move on machine-directional, substantially horizontal roller rails 6, and consists of a carriage at each end of the reel roll 4, which carries the reel end bearing housing::. As the diameter of the machine roll 3 increases and the roll moves forward, it 25 is continuously in contact with the support member 7 due to the fact that the transfer device 5 ... the conveyor path and the portion carrying the web 1 of the support member 7 together form an angle that opens in the conveying direction. In Figure 1, the upper portion of the loop 0 0 ***** of the support member 7, carrying the web 1, is inclined downwardly in its direction of travel with the transfer path of the roll 3 (and the reel roll 4) substantially: 30 horizontal.

• 0 • * ···. ··. The transfer device 5 is moved along the winding rails 6 in the forward direction of the web 1 in accordance with the increase in the diameter of the roll 3 so that the roll is. from below, always in contact with the loop of the support member 7 such that the web 35 moves to the outer circumference of the roll 3 in the winding nip 2 between the loop web portion and *: **: The scrolling nip 2 thus progressively advances to the upper portion of the loop 117479. When the roll 3 is full, the reel roll 4 forming the core of the new roll is brought into the exchange position and the web 1 is changed to run around it at the production speed. The entire roll 3 is removed from the transfer device 5, and the transfer device is moved back to the beginning of the portion carrying the loop web 5 1, and a new reel roll 4 around which a new web has begun to accumulate after replacement is released from the start rewind station.

The retractor underpressure arrangement of the invention is shown in principle in Figure 1. The underpressure arrangement provides a underpressure (as depicted by arrow F1 in the figure) extending at least through a surface facing the web 1 of the support member 7, preferably from the side of the web In this case, the negative pressure F1 will bring the web 1 against the support member 7 and / or affect the contact between the contacted surfaces of the web and the support member 15. Preferably, vacuum F1 acts on the friction between the surfaces of the web 1 and the support member 7, for example by increasing the vacuum (for example by increasing the suction flow) to increase the amount of friction or grip. By influencing the friction / grip between the surfaces of the web 1 and the support member 7, e.g. 20 scrolling results. It is advantageous to adjust the vacuum F1 at various stages of the process, such as, for example, threading, initial winding, secondary roll:, · shutdown of the wreckage system and roll change.

··· «: v; To achieve vacuum F1, the vacuum arrangement comprises suitable members 25 such as blowers 11 and nozzles 10. The vacuum arrangement v 'can be implemented in a variety of ways and some preferred embodiments of the vacuum arrangement are shown in Figures 2-6.

• · * · «A«

Fig. 2 shows a depressurization arrangement of the retractor, in which the air flow F1 through the support member 7 is obtained by deflecting air from the first guide roll 8, preferably inside the guide roll. he Parties. On the surface facing the support member 7 of the guide roll 8, air channels are formed through which air can flow through the guide. to the inside of the roll. Typically, the negative pressure and hence the airflow F1 35 is formed by a fan 11 which draws air from the interior of the guide roll 8. *: * ·: This embodiment is very advantageous especially when the end of the web 1 is introduced into the retractor via the "hard nip" of the reel, since 8 117429 thereby contacts the end of the web and the support member 7 of the reel at a convenient step. Typically, the negative pressure F1 is formed at a constant size over the entire width of the roller support member 7, i.e. substantially the width of the web 1 to be wound, but it is possible to form a negative pressure arrangement such that the suction effect of the support member varies across the web.

The method of forming the air flow F1 directed through the first guide roll 8 shown in Figure 2 can also be applied, if necessary, to other rolls, such as the latter guide roll 9, for example.

Fig. 3, in turn, shows a depressurization arrangement of the retractor, in which the depressurization F1 is achieved by deflecting air from the inside of the loop formed by the support member 7, preferably between the first guide wire 8 and the second guide roll 9. Typically, the airflow forming the negative pressure F1 is provided by a suction box 10a which may be uniform throughout the region. Preferably, there are multiple suction boxes 10a, and most preferably multiple suction boxes both in the running direction of the web 1 and in the transverse direction (such as the separate sub suction 20c boxes shown in Figure 4). Preferably, however, the suction box 10 has a steplessly movable guide 12, such as a steplessly movable partition wall 12 along with the movement of the nip 2. The guide 12 may be kinetically coupled to the device 5 for moving the scroll core 4. nan 1 transverse to the direction of travel, whereby the vacuum region 25 can be adjusted in the width direction. It is also possible to combine the controller 12 and the suction box structures 10c described above in a number of ways so that, for example, in the transverse to ***** direction of the web 1, there may be a plurality of sub-suction boxes having a web direction. 12. The air flow and the underpressure F1 can then be adjusted differently at different positions of the support member 7, whereby the force between the web 1 and the support member can also be adjusted in various ways.

• »t \ * describing the negative pressure of the arrow F1 purpose is just to illustrate a vacuum of 35 agent and / or air flow in the direction of principle and position, but does not describe a vacuum and / or air flow in the exact location, direction or distribution. For example, in Fig. 3, vacuum F1 and airflow are distributed over the entire suction area as defined by suction box 10a. The same principle has also been used to label the blowing airflow F2 in Figure 6.

Fig. 4 shows a preferred embodiment of the vacuum system which combines the embodiments shown in Figs. 2 and 3. Furthermore, the suction box 10 is formed in the example from a plurality of separately controllable sub suction boxes 10c. Vacuum F1 (i.e., airflow in this example) can thus be formed in the area between both the first guide rolls 8 and the guide rolls 8.9. The sub suction boxes 10c according to this embodiment allow the suction effect to be applied at desired locations in the region between the guide rolls 8.9. In this case, the suction effect can be applied, if necessary, anywhere on the area where the web 1 and the support member 7 are in contact. The worst-case pressure F1 of the fit-15 can also be individually controlled for strength at different locations on the retractor, whereby, for example, the guide roll 8 and the guide rolls 8,9 may be depressurized at the same or different times or the airflow intensity may be different.

20

In the foregoing examples, the vacuum F1 and the suction - *: * ·: * it produces are obtained by removing air (i.e., sucking the air out of the fan) from these spaces. However, it is possible to achieve a similar suction effect in other ways. One way is shown in Fig. "25, inside which the loop formed by the support member 7 is arranged, .V blowing box 10b. Air is blown into the space from the blowing box 10b, and by directing said airflow away from the inner surface of the supporting member 7. flow and thus the vacuum effect F1 which forms the web

There is a 30 1 suction effect.

• ♦ • * M ». ···. The length of the vacuum region in the longitudinal direction of the support member 7 is preferably adjusted so that it acts before the roll 3 (i.e. before the nip 2) but not after the nip. Thus, most preferably, the suction box located inside the loop 35 of the support member 7 has stepless movement of the nip 2: ··: a movable partition 12, as shown in the embodiment of Figure 3. Intermediate wall 12 may be kinetically coupled to device 10 117429 5 for transferring reel core 4. A stepwise adjustment option is to divide the interior space (preferably suction box 10) of support member 7 at least in the travel direction of support member to compartments 10c which are successively connected. In a preferred embodiment, the compartments 10c 5 also have a transverse direction, whereby it is possible to arrange a vacuum area corresponding to the width of the webs of different widths, i.e. also the width of the webs of partial widths. Because the support member 7 may have transverse and / or machine direction vacuum zones as described above, it is preferable to form the zones to be individually adjusted in each of these 10 directions.

In the previous examples, air flow F1 directed from the direction of the web 1 towards the support member 7 has been discussed. However, in some applications it is advantageous if the air flow from the support member 7 is directed to the web 15 1. Figure 6 shows an embodiment which has both suction and blowing capability. In this embodiment, the first portion of the retractor has an airflow F1 absorbing the web 1 and an airflow F2 blowing the web at the remainder. Preferably, the direction of the air flow F1, F2 changes after the nip 2 between the web 1 and the support member 7. By using blowing airflow F2, the release of the web 1 from the surface of the support member 7 may be facilitated, for example, in connection with the roll change ·: * ·: transfer of the web end to a new reel reel 4. In one embodiment, means 10, 11 for generating both a suction F1 and a blowing F2 air flow. In the figure, the suction member 10 is shown in principle such that a suction member 10 is provided inside the loop of the support member 7, in connection with which both the blowing and sucking fan 11. The suction member 10 can be ··· * implemented in various ways. , to achieve the desired airflow F1, F2 at • ·: 30 desired locations.

··· • · • · • «·, ···. As an example of the operation of the reel winder according to the invention, the threading situation of the web 1 is shown. In the threading situation, the threading ribbon of the web 1 is guided, by a suitable arrangement, to the beginning of the transport portion 35 of the support member 7, from which the surface of the loop of the support member guides it · · · ·: According to the invention, a vacuum is applied between the surface of the support member 7 and the threading strap of the web 1, which substantially and uniformly contacts the surface of the supporting member. In this case, the threading strap typically follows the surface path of the support member 7 towards the nip 2. The nip 2 is formed when the empty reel roll 4 is against the strap of the support member 7 or the reel roll 5 is later brought into contact with the supporting member strap. As the threading strap passes through the nip 2, the web 1 is applied to the full width by an inclined cut which can be performed by methods known per se. In a preferred embodiment of the invention, the vacuum substrate is applied simultaneously so that the vacuum region 10 is substantially wide of the web 1 or the part-plate web in each section. kuutilanteessa. After the web is applied, the full-length web 1 passing through the nip 2 is displaced by any suitable method around an empty reel roll 4, for example by blowing. When the end of the web 1 is thus introduced into the spool reel 4, the continuous roll 15 can be started into successive machine rolls.

The threading strip may consist of a so-called "strip" separated from the edge of the full-width web 1. but may also consist of a strip separated from the middle of the web. It is preferable that the vacuum arrangement 20 is such that, if necessary, the suction zone acts within a region narrower than the travel width of the full-width web 1, preferably only at the point where the threading strap or web passes. In this case, the vacuum is applied only to the compartment 10c or • v located at the headband. compartments to which, for example, suction or blowing are conducted, whereby compartments located in the area provide a vacuum to pull the strap against the surface of the support member 7. When applying the expanding web 1 and the full-width web after the threading strip, the area of influence can be spread to the entire vacuum area. If the vacuum roller vacuum zone is only narrower than the winder 30, for example, on the other side of the winder, the winder only needs to: - a *: pan be air permeable only at this width.

»·« * ·

The outward blowing F2 of the inside of the loop of the support member 7 may also be used for purposes other than assisting the release of the web 1 35. One advantageous effect of blasting is on the cleanliness of the surface of the support member 7, since the materials moving from the web 1 to the surface of the support member can then be partially or completely blown away. The cleanliness of the surface of the support member 7, in turn, has an effect on the air permeability of the support member, and it is possible to achieve a better controlled suction effect on the clean surface of the support member 7.

Various embodiments of the reel vacuum system have been discussed in the previous examples. While maintaining the basic idea of the invention, the various elements 10,11 of the vacuum system can be disposed in several different ways. Typically, the fans 11 are positioned outside the loop formed by the retractor support member 7, and the air flow is controlled by channels 10 from the fan to the desired location. However, it is possible to place some fan models 11 also inside the loop of the support member 7.

By combining the operating modes and structures presented in connection with the above various embodiments of the invention in different ways, various embodiments of the invention may be obtained which are in accordance with the spirit of the invention. Therefore, the foregoing examples are not to be construed as limiting the invention, but embodiments of the invention may freely vary within the scope of the inventive features set forth in the claims below.

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Claims (17)

A method of rolling in which a paper web is continuously rolled into rollers around rotating rolling cores in such a way that the web 5 is guided to a roll (3) around a rolling core (4) via an intermediate loop means (7) between the loop. ) and the roller (3) existing roller nip (2), and at least at some point the roller core (4) is moved relative to the loop of the support member (7) according to the growth of the diameter of the roller (3) in such a way that the position of said roller pin (2) for - moves forward on a section of the endless support member | (7) moving the web (1), in the direction of travel of said section. the force pushing the surfaces of the web (1) and the endless support member (7) against each other and the adhesion between the web and the support member are controlled with a negative pressure, which is arranged at least on part of the section of the support member moving the web. characterized in that during operation, at least one of the following changes: the operating range of the pressure, the position of the vacuum, the strength of the vacuum. ·: ··: 2. A method according to claim 1, characterized in that the suppressor sv. range of action changes in the running direction of the web (1). 25 • · ..... Method according to claim 1 or 2, characterized in that the area of operation of the underpressure is changed transversely relative to the running direction of the web (1). : 30 Method according to any of the preceding claims 1 to 3, characterized in that the range of action of the vacuum is changed by. to move a steplessly moving control means 02) arranged within the loop (7). • * ·· * 35 Process according to any of the preceding claims 1-3, characterized in that the area of operation of the vacuum is changed by changing zones (10c) arranged within the loop of the support member (7). 6. A method according to any of the preceding claims, characterized in that the vacuum is arranged in at least one of the following steps: tip drawing of the web, primary rolling, secondary rolling, 10. rolling replacement, closure of a processing system. Method according to claim 1 or 2, characterized in that an additional air flow (F2) is controlled, which is controlled by the supporting means (7) outside the inside of the loop. A reeling device adapted to roll a paper web continuously for rollers about rotating rolling cores, and comprising at least 20. a transfer device (5) for wiping a rolling core (4) and a supporting roller (3) around it. un- ·: * ·: during the roll, in which the paper web (1) is continuously controlled »· *: on the roll through a rolling nip (2), - a loop formed by an endless support member (7) comprising a web moving section which forming a rolling nip (2) ...... wherein a transfer device (5) is arranged to move the roller (3) upon rolling such that said rolling nip (2) moves in the direction of travel of the web moving section, one within the loop of the first and existing second rollers (8,9), - a suppression arrangement, which is at least partially located within the loop of the support member (7), and which is arranged to form suppression at least on a portion of the support member (7). stödorg moving portion of the web (1) to control the force pressing the surfaces of the web (1) and the endless support means (7) towards each other, and adhesion between the web and the surface of the support member, characterized in that: during operation, at least one of the following can be adjusted: - the range of action of the suppressor formed by the suppressor arrangement, 5. the location of the suppressor formed by the suppressor arrangement, - the strength of the suppressor formed by the suppressor arrangement. Roll-up device according to claim 8, characterized in that the area of operation can be adjusted in the running direction of the web (1). Roll-up device according to claim 8 or 9, characterized in that the area of action can be adjusted in the transverse direction relative to the running direction of the web (1). Roll-up device according to any of the preceding claims 8 to 10, characterized in that the suppression arrangement comprises a steplessly movable control means (12) for adjusting the operating range of the negative pressure 20. Roll-up device according to any of the preceding claims claim 11, characterized in that the suppression arrangement comprises several separately controllable zones (10c) to adjust the operating range of the vacuum. «*« I «• ·» L: ' Roll-up device according to any of the preceding claims * * ··· 8-12, characterized in that the suppression arrangement is at least partially arranged in a guide roller (8, 9). 30 Winding device according to any of the preceding claims 8-13, characterized in that the suppression arrangement is at least partially arranged in the region between articulated rollers (8, 9). # * Roll-up device according to any of the preceding claims ·: ··: 8-14, characterized in that said suppression arrangement comprises a suction box (10a). 19 117429 16, Winding-up device according to any of the preceding claims 8 to 15, characterized in that the suppression arrangement comprises a blowing carriage (10b). 5 Winding device according to any one of the preceding claims 8-16, characterized in that it further comprises an air arrangement arranged to produce an air flow (F2) directed outwardly from the outer surface of the support member (7). 10 • »141 · • t ♦ ·« • * * B 9 • 9 9 • 9 99 9 • 99 9 9 9 9 999 9 9 • 9 • 9 9 9 9 • 99 9 9 9 ··· 9 • 99 9 9 9 9 999 9 999 • 9 9 9 9 99 9 9 9 9 9 99 • 9 9 9 99 9 9 9 9