EP1035053B1 - Method for winding a material web and winding machine to perform the method - Google Patents

Abstract

The process for winding a paper or cardboard web comprises feeding it over a carrier roller and forming a nip between this and a drum. The web is cut into sections by cutters (28, 28') which move transversely across the direction in which the web is being wound and transferred to a new, empty drum when the first becomes full. An Independent claim is included for a winding machine for carrying out the process.

Description

The invention relates to a method for winding a material web such as in particular a paper or cardboard web in which the material web guided over a carrier drum and between the carrier drum and a nip is formed for the drum and the material web for a respective one Drum change is severed, wherein the material web in several successive transversely to the web running direction Sub-sections by means of separate, generally assigned to only one sub-section in the transverse direction separating elements is cut so that in each section each formed a beginning of the path that can be performed on the new, still empty drum becomes. It also relates to a winding machine according to the preamble of claim 13.

A corresponding winding machine is, for example, at the end of a the manufacture or refinement of a machine that serves as a material web used. It can also be used, for example, to finish one to wind the wound winding roll. With the machine in question it is, for example, a paper, cardboard or tissue machine.

To separate the material web for a respective reel change various institutions known. So in addition to Gooseneck and Edge cobra today increasingly also with high-pressure water jet nozzles used. There is a disadvantage of Gooseneck and Randkobra in that the material web is not clean on the new, nor empty Drum can be performed. The separation also ensures not a clean cut with air, which is particularly the case with strongly longitudinal ones Papers can result in the web not covering the entire Width tears, but only after part of the web separates Longitudinal crack occurs. The disadvantage of a separation device in which the web in separated in a defined manner by means of a transverse movement consists in that the acceleration and speed of the separators are very must be high so that the cut tip does not become too long. One too long tip has a negative impact on the winding quality.

Furthermore, US Pat. No. 5,014,924 discloses one method and one Winding machine for winding a material web, in particular one Paper or cardboard web in which the material web has a Carried drum and between the drum and the reel a nip is formed and the material web for a respective one Drum change is cut, with the material web in several successive sections transverse to the web running direction by means of separate, generally assigned to only one subsection in Crosswise movable dividing elements is cut so that in each section one on the new, still empty drum executable path start is formed. The material web directly on the new, still empty drum when the Cut the surface of the same. The cut tongues generated with This means that the triangular shape adheres directly to the moistened surface of the new, still empty reels and a transfer of the material web the new, still empty drum is guaranteed.

The aim of the invention is a method and a winding machine of the beginning to create the type mentioned, with which the safest possible separation process is guaranteed.

With regard to the method, this object is achieved according to the invention solved, that the material web by means of the separating elements in the web running direction before the new, still empty drum is cut that for each section of the material web at least two separating elements are used and that the two are for a respective one Part of the material web used separating elements in the central region of the Section to form an uncut strip in the transverse direction in one Distance from each other and then in running material web in are moved in the opposite direction outwards.

Accordingly, the winding machine according to the invention is characterized in that that the separating elements are arranged in the web running direction in front of the new, still empty reel are and that each section of the material web each have at least two separating elements are assigned at a distance from one another that, when they are set in the middle Form an uncut strip in the area of the section and then can be moved in the opposite direction while the material web is running are.

Because of this training, there is always an extreme with every reel change safe and reliable separation process guaranteed.

It is advantageous if a contactless one is used as the separating element Separating element such as, in particular, a water jet or laser beam separating element is used.

The material web is expediently in at least four sections cut using separate cutting elements.

In certain cases, it is useful if the material web by means of cut the cutting elements in the direction of web travel in front of the drum becomes.

In an expedient alternative embodiment, the material web cut by means of the cutting elements on the carrier drum.

If the cutting process is carried out with full on the carrier drum Drum performed, a respective strip, in particular in one new, still empty drum and the full drum area be severed on the carrier roller. Each one can Strip, for example, using a blowing nozzle, a scraper or one Water jet are cut.

In contrast, the cutting process is at a distance from the carrying drum arranged full drum, so a respective strip especially in the exposed area between a new one empty drum and the full drum can be severed. there can a respective strip, for example by means of a blowing nozzle, a Water jet or a movable element such as one in particular Tee knife to be cut.

In certain cases it is advisable to use a respective strip one in the nip between the carrier drum and the new drum introduced double-sided adhesive element such as one double-sided adhesive tape is cut.

In principle, the material web can also be made using the cutting elements cut on the new, still empty drum.

For a respective section of the material web, for example two cutting elements arranged one behind the other in the direction of web travel be used.

For example, at least two transversely extending, parallel rows of cutting elements are used, the cutting elements of a respective row common and the two rows of cutting elements moved in opposite directions become. At least four are preferably in each row Cutting elements used.

In an expedient practical embodiment of the invention Process or the winding machine according to the invention the cutting elements of each row are moved by means of a rack and the two racks preferably by a common pinion moved in opposite directions. The movement in question can in particular both a translational and a rotational movement his. It is also a combination of these two types of movement possible. To support the winding of the first layers on the new drum For example, a double-sided adhesive tape can be used.

In the subclaims are further advantageous embodiments of the winding machine according to the invention and the method according to the invention specified.

Figur 1

eine schematische Darstellung einer Ausführungsform einer Wickelmaschine, bei der der Schneidvorgang bei an der Tragtrommel anliegendem vollem Tambour erfolgt,

Figur 2

eine schematische Darstellung einer weiteren Ausführungsform einer Wickelmaschine, bei der der Schneidvorgang bei im Abstand von der Tragtrommel angeordnetem vollem Tambour erfolgt,

Figur 3

eine schematische Darstellung zweier Zahnstangen, an denen jeweils Schneidelemente angebracht sind,

Figur 4

eine schematische Darstellung eines Ausführungsbeispiels für einen Schneidvorgang, bei dem die Materialbahn in Bahnlaufrichtung vor oder auf der Tragtrommel geschnitten wird,

Figur 5

eine schematische Darstellung einer weiteren Ausführungsform einer Vorrichtung zum Trennen der Materialbahn, und

Figur 6

eine schematische Darstellung einer weiteren Ausführungsform einer Vorrichtung zum Trennen der Materialbahn.

The invention is explained in more detail below on the basis of exemplary embodiments with reference to the drawing; in this show:

Figure 1

1 shows a schematic representation of an embodiment of a winding machine, in which the cutting process takes place with the full reel resting on the carrying drum,

Figure 2

1 shows a schematic representation of a further embodiment of a winding machine, in which the cutting process takes place with the full drum arranged at a distance from the carrying drum,

Figure 3

2 shows a schematic illustration of two toothed racks, to which cutting elements are attached,

Figure 4

1 shows a schematic illustration of an exemplary embodiment for a cutting process in which the material web is cut in front of or on the carrying drum in the web running direction,

Figure 5

a schematic representation of a further embodiment of a device for separating the material web, and

Figure 6

is a schematic representation of a further embodiment of a device for separating the material web.

Figure 1 shows a purely schematic representation of an exemplary embodiment a winding machine 10 according to the invention for winding a material web 12 on a drum 14, 14 '. With the material web 12 can in particular be a paper or cardboard web. The winding machine 10 can thus in particular at the end of a paper, Cardboard or tissue machine can be provided.

To produce a winding roll 16, the material web 12 is in the connection led to an spreader roller 18 via a support drum 20, the with an empty drum 14 'or the resulting winding roll 16 one already wound drum forms a nip 22. The carrier drum 20 and the resulting winding roll 16 are during the winding process kept in contact with each other to maintain this nip 22.

Figure 1 shows the winding machine 10 in an operating phase immediately before a reel change, for which the material web 12 cuts must become. In the present case, the finished winding roll 16 or full drum 14 on the support drum 20. At an angle above the drum 20, the new, still empty drum 14 'is already available. There is also a nip 22 between the support drum 20 and the new drum 14 'formed.

As can be seen from the figure 1, the support drum 20, the full reel 14 and the new reel 14 'each preferably by means of driven by a center drive.

This winding machine 10 can now be touchless at various points acting separating device 24, which is shown in FIG only by way of example in Zone I, i.e. in the web running direction L before the Carrier drum 20 is arranged. The non-contact separating device 24 can also, for example, on the drum 20, i.e. in Zone II of Figure 1 may be provided.

Figure 2 shows a schematic representation of another embodiment a winding machine 10. The winding machine 10 is again in an operating phase shown immediately before a drum change for which the material web 12 must be cut. In this case the finished winding roll 16 or the full reel 14 already from the Carrier drum 20 removed. The full set off from the carrying drum 20 Drum 14 takes up its changing position.

In the present case, the cutting process thus takes place at a distance of the drum 20 arranged full reel 14. Otherwise has this embodiment at least essentially the same structure like that of Figure 1. Corresponding parts are the same Provide reference numerals. This winding machine 10 can also be a non-contact separating device 24 assigned. In the present The case is this separation device 24, for example in a zone III on the new one, empty drum 14 'provided.

FIG. 3 shows a possible embodiment in a schematic representation that can be used in the winding machines 10 described above Separating device 24. In the present case, this comprises two to one another parallel, extending transversely to the web running direction L and in the transverse direction movable racks 26, 26 ', each with four non-contact working cutting elements 28, 28 'are attached. The two Racks 26, 26 'are opposed by a common pinion 30 Movable directions.

There are thus two extending in the transverse direction, parallel to each other Rows of cutting elements 28, 28 'are provided, the cutting elements 28, 28 'of a respective row together and the two cutting element rows are movable in opposite directions.

A separating element 28, 28 'can be a contactless one Separating element such as, in particular, a water jet or laser beam separating element be provided.

The contactless cutting elements 28, 28 'are on four sections a - d of the material web 12 distributed (cf. in particular also the Figures 4 and 5), with a respective subsection two in The web running direction L is assigned to cutting elements 28, 28 'located one behind the other are attached to different racks 26, 26 '.

This is the successive sections perpendicular to the web running direction L. a - d of the material web 12 separate, each generally in the transverse direction Movable cutting elements 28, 28 'assigned to in each Section a - d one each on the new, still empty drum 14 ' form executable path start. Each section a - d the material web 12 two in a row in the web running direction L. arranged cutting elements movable in opposite directions 28, 28 'assigned.

In the arrangement according to Figure 3, it would also be conceivable that the first Row of dividing elements stationary and the second row of dividing elements is movably attached, then the second row double Should have covered the way. The time required for the separation process would be increase accordingly.

Figure 4 shows a schematic representation of an embodiment for a cutting process in which the material web 12 in the web running direction L is cut before or on the support drum 20, i.e. the separator 24 for example in zone I or in zone II (cf. FIG. 1) is arranged. In Figure 4 are the cut lines through the pairs the cutting elements 28, 28 'assigned to the sections a - d are shown.

Then the two for a respective subsection a - d Material web 12 used cutting elements 28, 28 'in a middle Area of the section to form an uncut strip 32 in the transverse direction at a distance from each other and then with the material web 12 running in the opposite direction move outwards.

If the cutting process is carried out with the full on the carrier drum 20 Drum 14 (see FIG. 1), a respective strip 32 in the between the new, still empty reel 14 'and the full reel 14 area IV on the support drum 20 are severed. in this connection can a respective strip 32, for example by means of a blowing nozzle, a Scraper or a jet of water can be cut.

However, the cutting process takes place at a distance from the carrying drum 20 arranged full drum 14 (see FIG. 2), so a respective Strip 32 in the exposed area V between the new, still empty Drum 14 'and the full drum 14 can be severed. in this connection can a respective strip 32, for example by means of a blowing nozzle, a Water jet or a movable element such as one in particular Tee knife to be cut.

In principle, a respective strip 32 can also be inserted into the Nip 22 inserted between the support drum 20 and the new drum 14 ' double-acting adhesive element, preferably by means of a double-sided adhesive tape.

To support the winding of the first layers on the new drum 14 ', for example, double-sided adhesive tape can be used.

FIG. 5 shows a further embodiment in a schematic representation a device 24 for separating the material web. There are two each Separating elements 28, 28 'also mounted on a rotatable part 34, using a moving device to separate the material web, for example at least one hydraulic / pneumatic cylinder, in Rotation.

FIG. 6 shows a further embodiment in a schematic representation a device 24 for separating the material web. In this case it is a separating element 28, 28 'is mounted on a rotatable part 36. Possibly can be arranged in two rows. The movement device for separating the material web can, for example a push / pull rod or a cable.

LIST OF REFERENCE NUMBERS

10

winder

12

web

14

full of drum

14 '

new, still empty drum

16

reel

18

Spreader roll

20

carrying drum

22

nip

24

cutter

26

rack

26 '

rack

28

cutting element

28 '

cutting element

30

pinion

32

strip

34

rotating part

36

rotating part

L

Web direction

a - d

Sections of the material web

Claims (21)

1. Method of winding a material web (12), in particular a paper or board web, in which the material web (12) is guided over a carrier drum (20) and a nip (22) is formed between the carrier drum (20) and the spool (14, 14') and the material web (12) is severed for a respective spool change, the material web (12) being cut into a plurality of part sections (a - d) following one another transversely with respect to the web running direction (L) by means of separate dividing elements (28, 28') which are each assigned to only one part section (a - d) and which can be moved generally in the transverse direction, in each case in such a way that a web start which can be guided onto the new, still empty spool is in each case formed in each part section (a - d),
   characterized in that the material web (12) is cut by means of the dividing elements (28, 28') upstream of the new, still empty spool (14') in the web running direction (L),
   in that in each case at least two dividing elements (28, 28') are used for each part section (a - d) of the material web (12), and
   in that the two dividing elements (28, 28') used for a respective part section (a - d) of the material web (12) are set on at a distance from each other in the transverse direction in the central region of the part section (a - d) in order to form an uncut strip (32) and then, with the material web (12) moving, are moved outwards in opposite directions.
2. Method according to Claim 1, characterized in that the dividing element (28, 28') used is in each case a dividing element which operates without contact, in particular a water-jet or laser-beam dividing element.
3. Method according to Claim 1 or 2, characterized in that, by means of separate dividing elements (28, 28'), the material web (12) is cut into at least four part sections (a - d).
4. Method according to one of the preceding claims, characterized in that, by means of the dividing elements (28, 28'), the material web (12) is cut upstream of the carrier drum (20) in the web running direction (L).
5. Method according to one of Claims 1 to 3, characterized in that, by means of the dividing elements (28, 28'), the material web (12) is cut on the carrier drum (20).
6. Method according to one of the preceding claims, characterized in that a respective strip (32) is severed by means of a blower nozzle, a scraper or a water jet.
7. Method according to one of the preceding claims, characterized in that a respective strip (32) is severed by means of a double-sided adhesive element, preferably by means of a two-sided adhesive tape, introduced into the nip (22) between the carrier drum (20) and the new spool (14').
8. Method according to one of the preceding claims, characterized in that, for a respective part section (a - d) of the material web (12), two dividing elements (28, 28') arranged one after another in the web running direction (L) are used.
9. Method according to Claim 8, characterized in that use is made of at least two mutually parallel rows of dividing elements (28, 28') extending in the transverse direction, the dividing elements (28, 28') of a respective row being moved together and the two rows of dividing elements in opposite directions.
10. Method according to Claim 9, characterized in that in each row at least four dividing elements (28 or 28') are used in each case.
11. Method according to Claim 9 or 10, characterized in that the dividing elements (28, 28') of each row are moved by means of a rack (26, 26'), and the two racks (26, 26') are preferably moved in opposite directions by a common pinion (30), the relevant movement preferably being a translational or a rotational movement or a combination of these two movement types.
12. Method according to one of the preceding claims, characterized in that, in order to assist winding the first layers on the new spool (14'), a double-sided adhesive tape is used.
13. Winder (10) for winding a material web (12), in particular a paper or board web, in which the material web (12) is guided over a carrier drum (20) and a nip (22) is formed between the carrier drum (20) and the spool (14, 14'), and the material web (12) is severed for a respective spool change, in particular for implementing the method according to one of Claims 1 to 12, various part sections (a - d) of the material web (12) following one another transversely with respect to the web running direction (L) being assigned separate dividing elements (28, 28') which can in each case be moved generally in transverse direction in order, in each part section (a - d), in each case to form a web start that can be led onto the new, still empty spool (14'),
    characterized in that the dividing elements (28, 28') are arranged upstream of the new, still empty spool (14') in the web running direction (L), and
    in that each part section (a - d) of the material web (12) is in each case assigned at least two dividing elements (28, 28') at a distance from one another in such a way that, when they are set on in the central region of the part section (a - d), they form an uncut strip and then, with the material web (12) moving, can be moved outwards in the opposite direction.
14. Winder according to Claim 13, characterized in that the dividing elements (28, 28') provided are in each case a dividing element which operates without contact, in particular a water-jet or laser-beam dividing element.
15. Winder according to Claim 13 or 14, characterized in that at least four part sections (a - d) of the material web (12) are assigned separate dividing elements (28, 28').
16. Winder according to one of Claims 13 to 15, characterized in that the dividing elements (28, 28') are arranged upstream of the carrier drum (20) in the web running direction (L).
17. Winder according to one of Claims 13 to 16, characterized in that the dividing elements (28, 28') are arranged on the carrier drum (20).
18. Winder according to one of Claims 13 to 17, characterized in that a respective part section (a - d) of the material web (12) is assigned two dividing elements (28, 28') arranged one after the other in the web running direction (L).
19. Winder according to Claim 18, characterized in that two mutually parallel rows of dividing elements (28, 28') extending in the transverse direction are provided, the dividing elements (28, 28') of a respective row being moved together and the two rows of dividing elements in opposite directions.
20. Winder according to Claim 19, characterized in that in each row at least four dividing elements (28, 28') are provided in each case.
21. Winder according to Claim 19 or 20, characterized in that the dividing elements (28, 28') of each row are fitted to a rack (26, 26') that can be moved in the transverse direction, and in that the two racks (26, 26') can preferably be moved in opposite directions by a common pinion (30).

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