EP2019060A2 - Winding and method for winding strips of fibrous material in a winding device - Google Patents

Abstract

The device (1) has bearer drums (2, 3) forming a winding bed to accommodate winding rolls. A unit for axial displacement is provided for axially displacing axes of the drums during a winding procedure. The axis of the drum (3) in fiber web rolling direction is arranged in a vertical direction during operation. A winding loop (13) between the winding and the drum (3) is arranged in a plane or below a winding loop (12). The axis of the drum (3) is lowerable relative to the drum (2) by the unit for axial displacement. A pressure roll (8) is arranged at an outer periphery (11) of a winding (5). An independent claim is also included for a method for winding fiber web in a winding direction.

Description

The invention relates to a winding device for winding webs, in particular fibrous webs, preferably in the form of paper or board webs with at least a first and a second winding bed forming a support roller against which the winding during winding, wherein the first lying in the fibrous web running direction support roller of this is at least partially entwined, while the second is changeably adjustable in their position via means for axis displacement. The invention further relates to a method for winding a fibrous web in a winding device.

Winding devices in the form of so-called Doppeltragwalzenwickelvorrichtungen are known in a variety of designs. All have in common is that the winding of the wound fibrous web is supported by two support rollers, wherein the two support rollers form a winding bed. A substantial parameter for the subsequent further processing for fibrous webs wound with these machines is the winding hardness. Especially with fibrous webs in the form of paper webs, it is crucial that the winding hardness over the entire roll diameter is characterized by a certain course. Ideally, the winding hardness should be constant over the entire roll diameter, but alternatively fall evenly from a certain initial value to a final value. However, such behavior is only achievable if additional measures are taken, since otherwise with increasing roll diameter of the line pressure between the roller and the individual support roller or the support rollers further increases and thus also the occurring Winding hardness. Therefore, so-called loading rollers are used, which are arranged with their axes parallel to the support roller, wherein with those on the resulting winding a contact pressure is exerted. This is adjustable in size and can be controlled, the contact pressure is usually chosen very large at the beginning of the winding and is smaller with increasing roll weight. Such load rollers are therefore either linearly guided or handlebar guided. When handlebar-guided versions, the adjustability of the contact force via a pivotable handlebar. The loading roller is lowered before winding on the empty tube and pushes them with a certain force in the winding bed. Now starts the winding process and grows accordingly the Wickeldurchmesserr, so the force with which the load roller is pressed against the winding, initially increased. Only when reaching a certain diameter, the weight of the coil sufficient to achieve a good winding result and the contact force is no longer needed. As the winding diameter increases, the load roll moves farther and farther away from the apex line of the roll. Since the load roller usually acts not on the side on the winding, at which the feed of the fibrous web takes place, but on the side of the second support roller, this leads to a strong increase in the proportion of the force applied via the loading roller force on the first support roller, which leads to a deterioration of the hardening process.

Furthermore, measures for influencing the winding hardness are known to the effect that the position of the support rollers is changed to each other. Such a generic embodiment of a winding device is made EP 0 640 544 A1 previously known. Here axle displacement means are provided for axially parallel displacement of the axis of a support roller relative to the axis of the other support roller. The first support roller seen in the web running direction is designed with a larger diameter than the other second support roller and the axis of the second support roller is considered during the entire winding process in the vertical direction higher than the axis of the first support roller, which is also wrapped by the fibrous web and this leads, arranged. In this embodiment means connected to the axle displacement means are provided, causing a lowering of the axis of the second support roller in response to the increasing diameter of the coil such that the axis of the coil moves along a predetermined vertical or relative to a vertical plane only slightly inclined line of movement, the main load to improve the winding hardness in the fibrous web running direction first gap is supported.

The invention is therefore based on the object, a winding device of the type mentioned in such a way that even with displaceable, in particular handlebar-guided load roller as possible a uniform winding density over the entire winding is achieved.

The solution according to the invention is characterized by claims 1 and 12. Advantageous embodiments are described in the subclaims.

A winding device for winding fibrous webs in the form of paper or board webs with a first stationary and a second support roller, which abuts the winding during winding comprises Achsverlagerungsmittel for axially parallel displacement of the axis in the fibrous web running direction second support roller relative to the first support roller, wherein the Displacement according to the invention takes place in such a way that during operation the axis of the second carrier roll in the fibrous web direction in the vertical direction is arranged or displaceable such that the winding nip formed between the winding and the second support roll in a plane or below the other, formed between the first support roll and winding lap is arranged, wherein the second support roller relative to the first support roller via the means for axial displacement is lowered. The possibility of lowering the second support roller, the weight of the wound coil is increasingly shifted to the second support roller, so that the line pressure in the gap formed between the first support roller and the winding can be kept low, preferably at a constant value, so that the winding hardness is not adversely affected by high line pressures in the first press nip. According to a particularly advantageous embodiment, the adjustment takes place on a circular arc, that is by pivoting. For this purpose, the means for axle displacement comprise a guide device for the second support roller, which is pivotable about the pivot axis by means of a pivoting device. According to a particularly advantageous embodiment, the pivot axis is formed by the bearing axis or axis of the first support roller. In this case, the displacement around the outer circumference of the first support roller on a circular arc is always at a uniform distance, in this case with automatic lowering and load by means of a loading roller without significant additional effort when enlarging the coil, that is, depending on the feed rate of the fibrous web and the Drive speed of the individual support rollers, an increase in line force in the second gap formed between the winding and the second support roller is achieved, while the line force in the first gap between the winding and the first support roller can be kept constant, without complex control algorithms for determining the manipulated variable for controlling the adjusting device.

In this embodiment, the guide means for the support roller is mounted on the bearing axis of the first support roller according to a particularly advantageous embodiment. As a result, an axis parallelism between the support rollers is ensured in a simple manner.

It is also conceivable, however, to choose a different pivot axis than the bearing axis of the first support roller. In this case, however, the pivot axis is preferably also arranged in a region which allows a horizontal movement in the direction of the first support roller during pivoting.

According to a further third embodiment, it is possible to realize the displacement or displacement of the second support roller by superimposing a horizontal in a vertical movement. In this case, acting as a bearing axis axis of the second support roller stored for example via two guides. This solution has the advantage that here a free adjustability of the position and thus also the proportion of the supporting force to be supported by the second support roller is adjustable. This free adjustability makes it possible to selectively adjust the line pressure on the first support roller.

The two support rollers preferably have the same diameter. This offers the advantage of easy adjustability. However, it is also conceivable to make the second carrier roll larger than the first one, as a result of which an increase in the bearing force can once again be achieved here. It is also possible to provide the second support roller with a soft roll shell. In this case, no press nip forms with line contact, but a flat press nip, so that here the surface pressure in the second winding nip between the winding and the second support roller can be significantly reduced, which is positive for the winding quality.

According to a further embodiment, the required ratios can also be adjusted by shifting both support rollers. These are stored in the simplest case on a rocker whose pivot axis is below the bearing axes of both support rollers in the neutral position and which is arranged parallel to these. Preferably, the pivot axis of the rocker is arranged in the region of the bearing axis of the first support roller.

The pressing of the roll by means of a corresponding load roller. This is preferably handlebar-guided, that is, compared to a pre-settable on the handlebar force this is pressed upon enlargement of the coil against the handlebars and thus moves in the radial direction relative to the winding axis to the outside.

The inventive method for winding a fibrous web, wherein the winding is applied to a first and second support roller during the winding process, wherein the first support roller partially wrapped by the fibrous web is stationary and is carried out, characterized in that the winding hardness depending on the increase of the winding size, in particular the diameter, the second support roller relative to the first support roller from a position in which this with its axis in a plane or below the axis of the first Roller is lowered, is lowered.

According to a particularly advantageous embodiment, the second bearing axis of the support roller is pivoted. As a result, a uniform displacement of the second support roller is achieved. The pivoting is preferably carried out about the bearing axis of the first support roller, in which case an accurate axis-parallel guidance is given.

The winding process is performed with constant contact pressure on the pressure roller. Furthermore, the contact pressure can be controlled.

Here, according to the invention, a reduction is not made immediately, but only when the winding has reached a predefined minimum size and the bearing force in individual Wickespalten does not exceed a certain value. In this case, an increase in the diameter of the roll at least indirectly descriptive size, for example, the diameter or the fibrous web feed speed or the drive speed of the support rollers, detected and generated in response to this a manipulated variable for driving a setting device for the second support roller to change the position, wherein the change in position always takes place parallel to the axis.

Figur 1a und 1b

verdeutlichen in schematisiert vereinfachter Darstellung den Grundaufbau und die Grundproblematik einer Vorrichtung zum Wickeln einer Faserstoffbahn gemäß dem Stand der Technik;

Figur 1c - 1e

verdeutlichen in schematisiert vereinfachter Darstellung den Grundaufbau und das Grundprinzip einer erfindungsgemäßen Vorrichtung und eines erfindungsgemäßen Verfahrens zum Wickeln einer Faserstoffbahn;

Figur 1f

verdeutlicht anhand eines Diagrammes den Verlauf der Streckenlast im ersten Wickelspalt gemäß der Ausführung aus dem Stand der Technik und der erfindungsgemäßen Ausführung;

Figur 2

verdeutlicht in schematisiert vereinfachter Darstellung eine besonders vorteilhafte Ausführung einer Achsverlagerung der zweiten Tragwalze;

Figur 3

verdeutlicht eine alternative Ausführung zu Figur 2;

Figur 4

verdeutlicht eine weitere alternative Ausführung zur Achsverlagerung gemäß Figur 2 durch Überlagerung einer horizontalen und vertikalen Bewegung;

Figur 5

verdeutlicht eine weitere alternative Ausführung zur Achsverlagerung gemäß Figur 2 mittels einer Schwinge;

Figur 6

verdeutlicht anhand eines Signalflussbildes ein erfindungsgemäßes Verfahren zum Wickeln einer Faserstoffbahn, insbesondere zur Steuerung der Wickelhärte.

The solution according to the invention is explained below with reference to figures. The following is shown in detail:

FIGS. 1a and 1b

illustrate in a schematic simplified representation of the basic structure and the basic problem of a device for winding a fibrous web according to the prior art;

Figure 1c - 1e

illustrate in a schematic simplified representation of the basic structure and the basic principle of a device according to the invention and a method according to the invention for winding a fibrous web;

FIG. 1f

illustrated by a diagram of the course of the line load in the first winding nip according to the embodiment of the prior art and the embodiment of the invention;

FIG. 2

illustrates in a schematic simplified representation of a particularly advantageous embodiment of an axial displacement of the second support roller;

FIG. 3

illustrates an alternative embodiment too FIG. 2 ;

FIG. 4

illustrates a further alternative embodiment for axle displacement according to FIG. 2 by overlaying a horizontal and vertical movement;

FIG. 5

illustrates a further alternative embodiment for axle displacement according to FIG. 2 by means of a rocker;

FIG. 6

illustrates a method according to the invention for winding a fibrous web, in particular for controlling the winding hardness, by means of a signal flow diagram.

The Figures 1c to 1e illustrate in a schematic simplified representation of the basic structure of a winding machine 1 according to the invention for winding fibrous webs 6, in particular in the form of paper or board webs, and the method for winding a fibrous web 6. Die FIGS. 1a and 1b clarify the conditions in an embodiment according to the prior art. The same reference numerals have been used. The winding machine 1 comprises at least two support rollers, a first support roller 2 and a second support roller 3, which are arranged axially parallel to each other, are rotatably mounted and together form a winding bed 4 for receiving a coil 5. The winding bed 4 is formed by the theoretically possible contact area of the roll on the outer circumference of the support rollers 2 and 3. The winding 5 is formed by Winding the fibrous web 6 around a sleeve 7, wherein the fibrous web 6 is guided around the first support roller 2. The FIG. 1a illustrates the operating state before or at the beginning of the winding process according to the prior art. The fibrous web 6 is brought from the bottom left to the first support roller 2 and wraps around this on a portion of its outer periphery 14. The sleeve 7 or wound with fibrous web 6 of the winding 5 is loaded by a force adjustable in their pressure roller or load roller 8, so that the Pad pressure for the resulting during the winding winding 5 at the two support rollers 2 and 3 to influence.

The support rollers 2 and 3 preferably have the same diameter D2 and D3. The axes L ₂ , L ₃ , which correspond to the axes of rotation of the support rollers 2 and 3 are then in a plane which is preferably oriented horizontally, that forms an angle of 0 ° with the horizontal. Both axes of the support rollers 2 and 3, which are designated here L ₂ and L ₃ , are arranged axially parallel to each other. These form with the sleeve 7 and later the resulting winding 5 each have a winding nip 12, 13. The sleeve 7, around which the winding 5 is formed, is in this operating condition centrally between the two support rollers 2 and 3 in the winding bed 4, so that the Supporting force of the sleeve at each of the individual support rollers 2 and 3 is equal. The contact forces are shown here by means of arrow and designated F _A2 for the support roller 2 and F _A3 for the support roller 3. The loading roller 8 acts vertically and centrally on the sleeve 7, that is, the resultant force of the loading roller 8 on the sleeve 7 is in a vertical, preferably perpendicular to the connecting plane between the longitudinal axes L ₂ and L _{3 of} the support rollers 2 and 3. The second Support roller 3 acts as a support roller for forming the winding bed 4, while the first support roller 2 also serves to guide the fibrous web 6 to the winding 5. Until reaching a predefined size, in particular a predefined diameter D _{defined of} the roll 5, the load of the loading roller 8 is reduced. This is variable in their position relative to the position of the two support rollers 2 and 3, in particular the longitudinal axes L ₂ and L ₃ of Carrier rollers 2 and 3. The loading roller 8 is guided by the handlebar. For this purpose, the loading roller 8 is held by a pivotable about an axis A traverse 10 and out with respect to this in the direction of the arrow to be pressed in a position about the support rollers 2, 3 approximately opposite position on the already produced winding 5 with adjustable force. In this case, the unit of traverse 10 and loading roller 8 with increasing diameter D of the roll 5 follows on a circular segment path the outer periphery 11 of the coil 5. For this purpose, the loading roller 8 is associated with an adjusting device 9, the traverse 10 and the adjusting means, in particular the means for Change in position of the traverse 10 include. The axis of rotation A for the traverse 10 and thus the latter leading arm 20 is arranged with respect to the apex line of the resulting roll 5 on the side of the second support roller 3, that is in the axial direction in an area between the perpendicular to the center line of the sleeve 7 in the initial state or the parting plane between the support rollers 2, 3 and a region axially adjacent to the second support roller 3 on the side remote from the first support roller 2 side. The axis of rotation A is also above the bearing axes L ₂ , L _{3 of} the first and second support rollers 2, 3 are arranged. If a predefined winding size, in particular a predefined winding diameter D _{defined of} the roll 5 is reached, a further reduction of the force of the loading roll 8 with respect to the outer circumference 11 of the roll 5, to which it acts directly, is not absolutely necessary. This can be kept constant as a residual force. This residual load is technologically useful, but not necessarily necessarily required, that is, it can also be a reduction of the load to zero. Due to the still acting contact pressure, which acts against the winding 5 and due to the off-center, that is at an angle to the vertical line through the longitudinal axis L _{5 of} the winding force line of action causes the force F _{8 of} the loading roller 8 with increasing winding size an increase in the line force between cause the winding 5 and the first support roller 2 in the winding gap 12 formed between them, since due to the off-center application of force on the loading roller 8 on the winding 5, the larger force component would be supported on the first support roller 2. This existing force in the form of the contact force F _A2 is greater than that, which is composed of the weight force component of the coil 5 and the proportion of the force component from the load of the loading roller 8 and the second support roller 3 in the gap 13 between the winding 5 and the outer periphery 15 of the second support roller. The contact force F _A3 is smaller than the contact force F _A2 in the first gap 12, as in FIG. 1b clarified. To generally avoid differences in the size of the bearing force in the first winding nip 12 and an increase in the bearing force in the first winding nip 12, to reduce or limit, is carried out according to the invention according to the Figures 1c to 1e in a device 1 according to FIGS. 1a and 1b a lowering of the second support roller 3 relative to the first support roller 2, so that the longitudinal axis L _{3 of} the support roller 3 viewed in the vertical direction is lower than the longitudinal axis L _{2 of} the first support roller 2. As a result, the connection plane E _2; E _{3 of} the bearing axes L ₂ and L ₃ an angle relative to the vertical, in particular an angle to a perpendicular to the winding axis L ₅ a. The gap 13 is lowered relative to the position of the gap 12, wherein the position of the first support roller 2 is kept constant, that is, this is stationary, but rotatably mounted and driven. The lowering of the support roller 3 is carried out according to the invention such that the contact force F _A2 in the first gap 12 between the first support roller 2 and the winding 5 is kept constant. The contact force F _A3 increases accordingly. Thus, the main force is supported on the second support roller 3, while the fibrous web 6 leading support roller 2 with increasing winding size a constant line force F _A2 in the gap 2 is supported. The winding hardness is thus adjusted over the entire process as a function of this constant line force in the first gap. The axis displacement of the support roller 3 acts as a manipulated variable. The line force in the first winding gap can be kept constant via this. The Figure 1c illustrates in a schematic simplified representation of the lowering of the second support roller 3 and thereby adjusting force relationships in the winding nips 12 and 13, in particular the contact forces F _A2 and F _A3 . The Figures 1d and 1e illustrate the force distribution in the individual winding nips 12 and 13 between the support rollers 2 and 3 and the winding 5 during further lowering. It can be seen that the contact force F _A3 with respect to the contact force F _A2 with increasing winding size 5 increases, while the contact force F _{A2 is kept} almost constant.

FIG. 1f illustrated by a diagram of the balance of power in the first winding nip in dependence on the change in diameter of the winding roll. Applied here are the force F _LD with the load roller is pressed against the empty tube and is regulated until reaching a predefined winding diameter so that it rises and then decreases. The resulting line _load F _Lalt is also plotted. The characteristic F _Lnew illustrates the conditions in the solution _according to the invention with constant line _load over the entire winding process. The characteristic curve G illustrates the increase in the roll weight during the winding process.

With regard to the adjustability of the second support roller 3, there are a plurality of possibilities. This is moved around the outer periphery 14 of the first support roller 2. For this purpose, the support roller 3 associated with means 16 for axis displacement, comprising an adjusting device 18. The movement is preferably always such that the line force and thus the contact force F _A2 for the winding in the gap 12 is constant. For the realization of the displacement or movement of the second support roller 3 with respect to the axis L ₃ at a distance a to the axis L _2, there are a plurality of possibilities. This can be realized by superposition of linear, vertical and horizontal movements or as a pure pivoting movement. Preferably, the movement around the outer periphery 14 of the support roller 2 takes place on a circular path, wherein according to a particularly advantageous embodiment, the movement of the axis L _{3 takes place} by pivoting about the axis L _{2 of} the first support roller 2. In this case, like in the FIG. 2 reproduced schematically in a highly simplified representation, the means 16 for axis displacement of the second support roller 3 are designed such that preferably the axis L ₃ is mounted on a guide means 17, which in turn is pivotally mounted or rotatable about the axis L ₂ to the first support roller 2 , In this case, there is always an exact axis-parallel assignment of the axes L ₂ and L ₃ to each other. The Axial displacement takes place by a pure pivoting movement. Due to the pivoting directly around the pivot axis S acting as bearing axis L ₂ , the distance between the support rollers 2 and 3 is always the same. This solution allows a simple adjustment, in particular increase the line force on the support roller 3 with increasing winding 5. It illustrates the FIG. 2 for example, two theoretical positions of the support rollers 2, 3 to each other. The first is denoted by I and illustrates the position of the support roller 3 at the beginning of the winding process, that is, the arrangement of the bearing axes L ₂ and L _{3 of} the two support rollers 2 and 3 in a horizontal plane. The embodiment shown by a broken line illustrates the position of the bearing axis L _{3 of} the second support roller 3 after pivoting about a predefined pivot angle α. It can be seen that the distance a between the axes is constant. For pivoting the guide device 17 is associated with an actuating device 18. This can be carried out arbitrarily. Preferably, hydraulic or pneumatic or mechanically actuable actuating devices or a combination of these are selected. Preferably, the travel of the adjusting device 18 is limited, at least in the sense that the starting position I always includes the horizontal position of the bearing axis L ₃ , that is, an arrangement in a plane to the bearing axis L ₂ . A pivoting about the bearing axis L ₂ also is not possible. For this purpose, for example, a Verstellwegbegrenzung 19 is provided in the form of a stop. To improve the surface pressure in the gap 13, the roller 3 may also be provided with an elastic sheath.

Clarifies the FIG. 2 a particularly advantageous possibility, in which the pivot axis S coincides with the bearing axis L _{2 of} the first support roller 2, shows the FIG. 3 a theoretically further possibility in which the bearing axis L _{2 is arranged} quasi eccentric to the pivot axis S for L ₃ . Here, too, a movement takes place which describes a circular arc, based on the outer circumference of the first support roller 2, which, however, by a direction component in each case in the vertical direction and in horizontal direction directed towards or away from the first carrier roll 2. Also, a corresponding adjusting device 18 is provided. The support roller 3 is for this purpose, for example, on the machine frame, in particular the frame of the winding device 1, mounted and is moved over the adjusting device 18 and also here it can be provided with a travel limit.

The FIG. 4 illustrates a further embodiment in which the adjustment of the second support roller 3 is not done by a pure pivoting about a pivot axis S, but by a superposition of a horizontal and a vertical movement, which are illustrated by arrows. Again, preferably, a movement of the support roller 3 take place such that the second support roller is moved about the outer periphery 14 of the first support roller 2, wherein the distance in the axial direction between the axes L ₂ and L ₃ rather decreases. The horizontal and vertical movement will be realized via appropriate guide means, in particular sliding guides, wherein one is preferably guided adjustably to the other.

FIG. 5 illustrates in a simplified schematic representation of a further embodiment in which the adjustment movement of the second support roller 3 is realized via a rocker 21. The rocker 21 is pivotally mounted about a pivot axis S. On the rocker 21, both support rollers 2, 3 are rotatably mounted. The pivot axis S is arranged such that it lies in the neutral position below the axes L ₂ and L ₃ . When pivoting both support rollers are changed in their position, but the winding nip at the second support roller 3 is always below the first nip on the first support roller 2 forming winding nip. Preferably, the distance between the pivot axis S and the bearing axis L _{2 of} the first support roller 2 is selected as small as possible, so that only a slight displacement of the first support roller 2 takes place. This is raised and the second support roller 3 is lowered during pivoting.

The FIG. 6 clarifies again with reference to a signal flow diagram, an embodiment of the method according to the invention, which can be controlled via a control and / or regulating device. For this purpose, at the beginning of the winding process, the second support roller 3 relative to the first stationary support roller 2 is positioned such that both form a horizontal winding bed 4, that is bearing surfaces or winding nips 13 and 12, which lie in a horizontal plane. This corresponds to the position I of the second support roller 3. The loading roller 8 is arranged in this state such that it preferably centrally, that is with its center axis on the vertical to the center line of the winding tube rests. The winding process is started. In this case, there is a displacement of the loading roller 8 along the outer circumference 11 with an increase of the resulting roll 5. If a predefined size, in particular predefined diameter D _{defined defining} the size of the roll 5, starting from this point, the second support roller 3 in its position relative to the first support roller 2 is lowered, preferably pivoted about the outer periphery 14 of the first support roller 2. The adjustment is a function of the winding diameter or the resulting theoretical increase of the contact force F _A2 on the first support roller 2, which must be compensated. Therefore, a manipulated variable Y is calculated, which is determined as a function of an increase of the coil 5, in particular of the diameter D, and the adjusting device 18 is driven. The adjustment is effected until the maximum winding size D _{max is} reached. Then the winding process is ended. The winding device 1 can be re-equipped and the support roller 3 is again to spend in the functional position I. This can be done before the start of the next winding process or immediately after removal of the roll 5. Therefore, at the beginning of the winding process to check whether functional position I is set for support roller 3. In order to avoid an increase with subsequent lowering of the support forces and thus line forces F _A2 in the winding nip 12, the winding bed 4 in the functional state I is preferably characterized by a connecting plane between the bearing areas on the support rollers 2, 3, which lies in a horizontal plane. When, the change of the coil 5 at least indirectly characterizing size may be the Diameter D itself, a size characterizing the winding speed, for example, the rotational speed n of the first support roller 2 act. At least indirectly means that these quantities are directly or functionally related to the quantity to be determined.

LIST OF REFERENCE NUMBERS

1

winder

2

First carrier roll

3

Second carrier roll

4

winding bed

5

reel

6

Fibrous web

7

shell

8th

loading roll

9

setting device

10

traverse

11

Outer circumference of the coil

12

gap

13

gap

14

Outer circumference of the first support roller

15

Outer circumference of the second support roller

16

Means for axle displacement

17

guide means

18

setting device

19

limitation of travel

20

handlebars

21

wing

A

swivel angle

L ₂

axis

L ₃

axis

F _A2

Tracking force

F _A3

Tracking force

D

diameter

E _2'3

level

S

swivel axis

Claims (18)

Winding device (1) for winding webs, in particular fibrous webs (6), at least a first and a second support roller (2, 3), which form a winding bed (4) for receiving a winding roll and where the winding (5) during the winding process forming winding gaps (12, 13) and means (16) for axis displacement of an axis (L ₂ , L ₃ ) of a support roller (2, 3) during the winding process,
characterized,
in that the axis (L ₃ ) of the second carrier roll (3) in the fibrous web running direction is arranged during operation in the vertical direction such that the winding nip (13) formed between the roll (5) and the second carrier roll (3) lies in a plane or below the another winding gap (12) is arranged and the axis of the second support roller (3) relative to the first support roller (2) via the means (16) can be lowered to the axis displacement. Winding device (1) according to claim 1,
characterized,
in that the second carrier roll (3) is pivotable about the outer circumference (14) of the first carrier roll (2). Winding device (1) according to claim 2,
characterized,
in that the second carrier roll (3) is mounted on a guide device (17) which is mounted on a pivoting axis (S) via a pivoting device which is axially parallel to the bearing axis (L ₂ ) of the first carrier roll (2). Winding device (1) according to claim 3,
characterized,
in that the pivot axis (S) is formed by the axis (L ₂ ) of the first carrier roll (2). Winding device (1) according to claim 2,
characterized,
in that the first and the second support rollers (2, 3) are rotatably mounted on a rocker (21) which is pivotable about a pivot axis (S) which is outside the axes (L ₂ , L ₃ ) of the support rollers (2, 3). is arranged. Winding device (1) according to one of claims 1 to 3,
characterized,
that the bearing axis (L ₃ ) of the second support roller (3) is mounted on a vertical guide, which is mounted on a horizontal guide. Winding device according to one of claims 1 to 6,
characterized,
in that an adjusting device (18) is associated with the second carrier roller (3), comprising an adjustment path limitation (19). Winding device (1) according to one of claims 1 to 7,
characterized,
that a load roller (8) is arranged on the outer circumference of the roll (5) mounted on a cross member (10) is mounted and guided via a about an axis (A) pivotable striker, said a counter force to by the winding (5) applied force causes. Winding device (1) according to one of claims 1 to 8,
characterized,
in that the first carrier roll (2) in the fibrous web running direction is smaller than the second carrier roll (3) and the second carrier roll (3) is arranged in its starting position such that the axis (L ₃ ) is opposite the axis (L ₂ ) of the first carrier roll ( 2) in the vertical direction at a distance below the first support roller (2) is arranged, which corresponds at least to the difference in radius between the two support rollers (2, 3). Winding device (1) according to one of claims 1 to 8,
characterized,
in that the carrier rollers (2, 3) have the same diameter (D2, D3). Winding device (1) according to one of claims 1 to 10,
characterized,
that the second carrier roll (3) has an elastic jacket cover. Winding device (1) according to one of claims 1 to 11,
characterized,
in that it is associated with a control and / or regulating device for controlling the lowering of the second carrier roller (3) as a function of a variable which at least indirectly describes the contact force in the first winding gap (12). A method for winding a fibrous web in a winding device, wherein the winding (5) on a first and a second support roller (2, 3) during the winding process is applied, wherein the first lying in the winding direction support roller (2) of the fibrous web (6) partially is entwined, wherein the axis of the first support roller (2) is stationary in position, while the axis (L ₃ ) of the second support roller (3) in its position relative to the first support roller (2) is variable,
characterized,
that during the winding process in response to the increase in the winding size, the second support roller (3) relative to the first support roller (2) is lowered, so that the second gap (13) always below the first gap (12) between the support roller (2, 3) and Winding (5) is arranged. Method according to claim 13,
characterized,
that the second support roller (3) is guided along a circular arc. Method according to claim 13,
characterized,
that the lowering takes place by superimposing a horizontal and vertical movement. Method according to one of claims 13 to 15,
characterized,
that the lowering is controlled. Method according to claim 16,
characterized,
in that at least one variable describing the winding size is detected, at least indirectly, and the change in the position of the second carrier roll (3) is controlled and / or regulated as a function of a predefined contact force to be maintained on the first carrier roll (2). Method according to claim 16 or 17,
characterized,
that the contact force on the first support roller (2) is kept constant over the entire winding process.

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