EP1905714B1 - Method for creating a connecting point on a roller and device for winding a material web onto a roller - Google Patents

Abstract

Device for winding a material strip (2) on a spooling roller (3) comprises a unit (8) for measuring the diameter of the spooling roller, an auxiliary unit (16) for showing the position of a separating site for producing a first end strip (18) on the spooling roller and a unit (12) for temporarily holding the introduced material strip. An independent claim is also included for a method for producing of a connecting site of a spooling roller lying on a roll (7) in a spooling frame (1). Preferred Features: The auxiliary unit is a laser pointer and the unit for temporarily holding the introduced material strip is a controlled/regulated low pressure zone which is integrated into the roll and acts on the roll surface.

Description

The invention relates to a method for producing a connection point on a winding roll, which rests in a winding machine on a roller and forms a Auflagip with the roller, wherein a torn material web on the winding roll at a web end and in a feed region when creating a web start each severed such that the tail and the web start adjacent to each other and that the tail and the web start are connected by a transverse connecting strip on one side, in particular on the underside.

Furthermore, the invention relates to a device for winding a web to a winding roll with a roll on which the winding roll is applied during winding in a winding machine, a cross-cutting device for generating a web start and means for applying a connecting strip on a tail and the web beginning, which adjacent lie to each other.

The invention will be described below with reference to a paper web as an example of a material web. However, it is also applicable to other webs which need to be coiled in a similar manner to relatively large reels, namely to reels having a diameter in the range of 0.5 to 3.0 m and a width in the range of 0.2 to 5, 0 m.

A paper web is produced almost endlessly. To be later handled for shipping and a user, it becomes so-called shipping roles wound. Shortly before winding the paper web is usually divided by slitting into narrower partial webs. The width of the partial webs then determines the axial length of the winding rolls.

Ideally, a winding roll is wound continuously from start to finish. In this case, no interruption of the winding process occurs.

In reality, however, it is practically inevitable that the paper web breaks occasionally. In this case, the winding process is interrupted. To re-order winding conditions, the paper web must be glued together again. For this purpose, the tail, so the end of the paper web, which is already wound on the winding roll, straightened. The operator thus produces a section through the paper web, which should extend as possible at right angles to the running direction of the paper web during winding. Similarly, the beginning of the paper web is straightened, that is, the part of the paper web which is fed from a source, for example an unwinding device.

You then have to bring the tail and the web start together, where you have previously applied an adhesive layer so that it overlaps to lie between the tail and the beginning of the web. When the tail and web start have been joined together, the winding process can be restarted.

Making such an adhesive bond requires some skill from the operator. The operator must meet several requirements. On the one hand, the adhesive should only be between the two sections of the paper web, ie between the tail and the web start. Going beyond adhesive carries the risk that stick together more paper web layers on the winding roll. On the other hand, the free sections of the tail and web start beyond the adhesive strip may not be too large. Such "flags" may unfold in an unpredictable manner during further development and then lead to a further disruption of the winding process with the risk of a new web break.

The document EP 1 084 976 discloses a method wherein after detection of the material crack, the device is brought to a standstill. In this solution, no indication is given to create a joint.

The invention has for its object to enable a fast and secure generating a joint in the reeling of a web.

• dass die an der Wickelrolle anliegende Materialbahn bei Erzeugung eines ersten Bahnendes und einer Bahnschwarte an einer Position durchtrennt wird, deren Abstand zum Auflagenip an der Walze genauso groß ist wie der Abstand einer an der Walze angeordneten Einrichtung zur temporären Erfassung der eingeführten Materialbahn zum Auflagenip,
• dass das erste Bahnende an der Wickelrolle vorzugsweise fixiert wird,
• dass danach die Wickelrolle zwecks Entfernung der erzeugten Bahnschwarte in Laufrichtung der Materialbahn gedreht wird,
• dass die neue Materialbahn auf die Walze gebracht und von der Einrichtung temporär erfasst wird,
• dass das vorzugsweise an der Wickelrolle fixierte erste Bahnende gelöst und auf die Walze gebracht wird,
• dass die neue Materialbahn und das erste Bahnende gleichzeitig oder zeitlich versetzt mittels einer Quertrenneinrichtung bei Erzeugung eines zweiten Bahnendes und eines Bahnanfangs derart durchtrennt werden, dass das zweite Bahnende und der Bahnanfang benachbart zueinander liegen,
• dass wenigstens das abgetrennte erste Bahnende entfernt wird,
• dass das zweite Bahnende und der Bahnanfang durch den quer verlaufenden Verbindungsstreifen einseitig, insbesondere unterseitig miteinander verbunden werden.

This object is achieved in a method of the type mentioned in the present invention,

• that the web of material resting on the winding roll is severed when a first web end and a web are formed at a position whose distance from the overlay pad on the roller is the same as the distance between a device arranged on the roller for temporarily detecting the introduced web to the overlay lip,
• that the first tail is preferably fixed to the winding roll,
• that thereafter the winding roll is rotated in the direction of travel of the material web for the purpose of removing the generated web roving,
• that the new material web is brought onto the roll and temporarily captured by the device,
• that the first end of the web, which is preferably fixed to the winding roll, is released and brought to the roll,
• that the new material web and the first web end are simultaneously or temporally staggered by means of a cross-cutting device when a second web end and a web start are produced in such a way that the second web end and the web start are adjacent to one another,
• that at least the severed first tail is removed,
• that the second tail and the web start are connected by the transverse connecting strip on one side, in particular on the underside.

The object of the invention is completely solved in this way.

The method steps according to the invention thus allow the creation of a connection point in the reel in the form of a so-called butt splice, ie a butt joint. This Butt Splice generally has the advantage that the joint does not have twice the web thickness and also no stepped shoulder (shock) at the junction. An overlapping impact at the joint may result in failure and even damage in subsequent processing machines.

With this procedure, it is necessary to know various parameters of the winding device, namely the current diameter of the winding roll, the diameter of the roll against which the winding roll abuts, and the position of the device for temporary detection of the generated first tail and the new material web. If these data are known, one can easily calculate the circumferential lengths of winding roll and roller, which must be coordinated.

This procedure can be used both in a support or contact roller winder, in which the winding roller is held centric and rests only under a certain pressure on the roller, as well as in a Doppeltragwalzenwickler, in which the winding roller rests on two support rollers.

Preferably, the position at which the material web is to be severed at the winding roll, displayed with an auxiliary device. This makes it easier for the operator to cut the web on the winding roll. With the auxiliary device, it is therefore possible to automate the connection process at least partially by the fact that the operator does not have to make any calculations on his own. Rather, the calculations are made in the system, ie in the winding machine, so that the operator has to rework only certain specifications, so to speak.

It is preferred that the position is displayed without contact. This keeps the risk low that the winding roll or wound layers of the material web are damaged.

It is particularly preferred that a laser pointer is used to indicate the position. A laser pointer can easily generate a continuous straight line. This line must follow the operator only with a suitable cutting device to perform the straight cut for the production of the tail. In this case, several layers of the material web which have already been wound up on the winding roll are usually severed.

In view of a simple and smooth procedure without time-consuming preparations, it is advantageous if the device for temporary detection of the introduced material web generates a preferably controllable / controllable negative pressure, which acts in such a way that the introduced material web is held on the roller. This negative pressure ensures a secure mounting of Bahntrume on the roller without any influence or change their properties.

In order for the generated sheet rind to be removed from the winding machine quickly and without any damage being caused, it is preferably fastened to at least one clamp applied directly or indirectly by a tension spring. Upon rotation of the winding roll in the running direction of the material web, it is then completely pulled out of the winding machine after dissolution of the last support pad holding them due to the acting spring force.

As already stated in the cited prior art, it has proved to be advantageous if the new material web is cut into the width of the machine by means of a cutting device before it is conveyed over the stationary roller. As a result, a running transversely to the direction of the web material cutting edge can be generated, on the one hand, the introduction of a symmetrical material web in the Winding machine allowed, on the other hand ensures their uniform temporary detection by the device.

Since in the Bringing of the new web on the dormant roller of the web train due to effective friction increased by up to 70%, it may be advantageous if the roller is rotated against the direction of the material web before the new material web is brought, then that new material web is brought over them and that they are moved together so long in the direction of the roller, that after the transverse separation of the new material web by means of the cross-cutting device, the second tail and the web start adjacent to each other.

Under technological, spatial and financial aspects, it is advantageous if the second tail and the web start are generated by one and the same cross-cutting device. The overhead in such an embodiment is limited, so that it in turn has an excellent profitability.

In a preferred embodiment, in particular for web types with low basis weights, the connection point generated in the direction of travel of the web is continued until a second connecting strip for bidirectional connection of the second tail and the web start can be mounted on the side opposite the first connecting strip side of the web. Thus, a connection point with even better connection properties can be formed.

Under technological, spatial and financial aspects, it is advantageous if the second tail and the web start are generated by one and the same cross-cutting device. The overhead in such an embodiment is limited, so that it in turn has an excellent profitability.

The transverse and preferably designed as an adhesive tape connecting strip can be applied both automatically and manually on the second tail and the web beginning. Both options have specific properties and advantages, but generally the automatic application of the connection strip will be preferred.

Depending on the timing and requirements of the transverse and preferably designed as an adhesive tape connecting strip can be applied to the second end of the web and the web start with stationary or rotating roller.

• dass eine Durchmessermesseinrichtung vorgesehen ist, die den Durchmesser der Wickelrolle erfasst und die mit einer Hilfseinrichtung, die die Lage einer Trennstelle zur Erzeugung eines ersten Bahnendes an der Wickelrolle anzeigt, oder einer Quertrenneinrichtung, die das erste Bahnende am Umfang der Wickelrolle erzeugt, verbunden ist, und
• dass eine Einrichtung zur temporären Erfassung der eingeführten Materialbahn vorgesehen ist.

The object is achieved in a device of the type mentioned in the present invention,

• that a diameter measuring device is provided which detects the diameter of the winding roll and which is connected to an auxiliary device which indicates the position of a separation point for producing a first tail on the winding roll, or a cross-cutting device which generates the first tail on the circumference of the winding roll, and
• a device is provided for temporary detection of the introduced material web.

Further embodiments of the invention will become apparent from the device dependent subclaims.

Further features and advantages of the invention will become apparent from the following description of a preferred embodiment with reference to the drawings.

Figur 1

eine Wickelmaschine mit einer Wickelrolle nach einem Bahnabriss beim Durchtrennen der Materialbahn am Bahnende;

Figur 2

die Wickelmaschine beim Herausfahren einer Bahnschwarte;

Figur 3

die Wickelmaschine beim Aneinanderlegen des zweiten Bahnendes und des Bahnanfangs;

Figur 4

die Wickelmaschine beim Anlegen des ersten Bahnendes auf die Tragwalze;

Figur 5

die Wickelmaschine beim unterseitigen Verbinden des zweiten Bahnendes und des Bahnanfangs; und

Figur 6

die Wickelmaschine beim oberseitigen Verbinden des zweiten Bahnendes und des Bahnanfangs.

Show it:

FIG. 1

a winding machine with a winding roll after a web break when cutting the web at the tail;

FIG. 2

the winding machine when moving out a Bahnschwarte;

FIG. 3

the winding machine when juxtaposing the second tail and the web start;

FIG. 4

the winding machine when applying the first tail to the support roller;

FIG. 5

the winding machine at the underside connecting the second tail and the web start; and

FIG. 6

the winding machine at the top side connecting the second tail and the web start.

The FIG. 1 shows in a greatly simplified form the device 1 (winding machine) for winding a material web 2 to a winding roll 3. Shown is a situation in which the material web 2 is just torn off. A free "flag" 4, which is without tension, forms a remainder of the material web 2, which is otherwise wound on the winding roll 3.

The winding roll 3 lies in a winding bed 5, which is formed by two support rollers 6, 7. Both support rollers 6, 7 each have a drive, not shown. In operation, the two support rollers 6, 7 are driven in the counterclockwise direction. The resting on the two support rollers 6, 7 winding roll 3 is thereby also set in rotation and pulls the web 2 on it.

A diameter measuring device 8 continuously or if necessary determines the diameter D of the winding roll 3. This diameter measuring device 8 may have different configurations. Preferably, it works without contact, for example with ultrasound or infrared.

The winding roller 3 forms with the two support rollers 6, 7 each have a Auflageip 9, 10. The position of the Auflagenips 9, 10 changes in the course of the winding process. As the diameter D of the winding roll 3 increases, the winding roll 3 moves further out of the winding bed 5. If necessary, you can the Position the Auflagenips 9, 10 or use their distance for the determination of the diameter D of the winding roll 3.

After a tear, one end 11 of the material web 2 usually has an indeterminate course. It is extremely unlikely that the crack edge follows a straight line. It is equally unlikely that the end 11 is perpendicular to the direction L (arrow) of the web 2. The resulting by the web tear end 11 is therefore basically not to use for further processing. An operator must therefore take certain measures, which are explained below.

First, the operator will clean the winding machine 1 of web residues and cut off the end of the web 2 on the circumference of the winding roll 3 temporarily. The end can be separated, for example, in Auflageip 10, because the web 2 is clamped there between the support roller 7 and the winding roller 3.

For the following procedure, it is assumed that the winding roll without slipping on the support rollers 6, 7 moves, that is, when the support rollers 6, 7 rotates, then you know due to the known diameter measuring device 8 by the diameter of the winding roll 3 to how much the winding roll 3 has rotated.

The support roller 7 further has a device 12 for temporary detection of Bahntrumen. The device 12 is a controllable vacuum zone 13, which is integrated in the support roller 7 and which acts on the roller surface 7.1. For reasons of clarity, the device 12 is only hinted at here.

The operator now separates the material web 2 on the circumference of the winding roll 3. For this purpose, she uses a knife 15 or a similar tool. Usually, this is not just a single outer layer on the Winding roll 3 is severed, but several layers. The position P at which the operator guides the knife 15 through the layers, it is displayed by an auxiliary device in the embodiment of a laser pointer 16, which is controlled by a control device 17. The laser pointer 16 generates an axis-parallel straight line on the circumference of the winding roll 3, specifically where the cut is to be made.

The voltage applied to the winding roll 3 material web 2 is when generating a first tail 18 and the Bahnschwarte 14 (see FIG. 2 ) is severed at the position P, the distance to the Auflagenip 10 on the roller 7 is the same as the distance of a arranged on the roller 7 means 12 for temporary detection of the introduced material web 2 to Auflageip 10th

As mentioned above, in this case the angular relationship between the winding roll 3 and the two support rollers 6, 7 is maintained, so that the control device 17 continuously knows at which position the first tail 18 is located on the circumference of the winding roll 3. This first tail 18 is here for the sake of clarity in the FIG. 2 represented as a triangle.

After the severing of the material web 2 on the circumference of the winding roll, the first tail 18 is fixed to the winding roll 3. The fixation can be done for example by gluing the first tail 18 on the winding roll 3.

The FIG. 2 now shows the winding machine 1 when moving out of a Bahnschwarte 14th

The control device 17 now rotates the two support rollers 6, 7 in the direction of travel L (arrow) of the material web 2 by operating the drives on, so that the operator can pull out the Bahnschwarte 14, which is caused by the severing of the outer layers of the winding roll 3. In the situation shown, the generated web scarf 14 on at least one of attached to a tension spring 20 directly or indirectly applied terminal 19 and thus upon rotation of the winding roller 3 in the direction L (arrow) of the web 2 away. This combination of terminal 19 and tension spring 20 is referred to in professional circles as a balancer.

The removed from the winding machine 1 Bahnschwarte 14 can then be eliminated by the operator in a known manner and optionally fed to the stock preparation of a nearby paper machine.

The FIG. 3 shows the winding machine 1 when introducing the new material web. 2

In this case, the machine width cut in advance machine width 2 is brought over the stationary support roller 7 and detected by the device 12 temporarily. The device 12 comes in the upper region of the support roller 7, preferably between a 12 and 1 o'clock position, to a standstill. Thereafter, the web 2 is cut in the direction L (Peil) of the web 2 after the device 12 by means of a cross-cutting device 21 when generating a web start 22.

The FIG. 4 now shows the winding machine 1 when creating the first tail 18 on the support roller. 7

Here, the temporarily fixed to the winding roller 3 first end of the web 18 is released from the same and placed on the support roller 7. This process will generally be done manually.

Thereafter, the first tail 18 is severed by means of the cross-cutting device 21 when creating a second tail 23 such that the second tail 23 and the web start 22 adjacent to each other. The cross-cutting device 21 for generating the second tail 23 is identical in the present embodiment with the cross-cutting device 21 for generating however, they may be different. Subsequently, at least the severed first tail 18 is removed in a known manner.

In the next process step, as in the FIG. 5 shown, the second tail 23 and the web start 22 by the transverse connecting strip 24 on one side, that is connected to each other in the present case, bottom side. The connection can take place in the region of the transverse separating device 21. For the automatic application of the connecting strip 24 on the two Bahntrume 22, 23 when forming a joint 25, a device 26 known to those skilled in the art is provided. Of course, the connection strip 24 can also be applied manually.

And ultimately that shows FIG. 6 the winding machine 1 at the top side connecting the second tail 23 and the web start 22nd

In this case, the connection point 25 produced in the running direction L (arrow) of the material web 2 is further moved until on the opposite side of the first material strip 2, a second connecting strip 27 can be attached for two-sided connection of the second tail 23 and the web start 22. In a preferred embodiment, the two connecting strips 24, 27 are applied from one and the same device 26 to the second tail 23 and the web start 22. The application of the second connecting strip 27 is carried out at vorzugsweisem standstill in the upper region of the winding roll 3, preferably between a 1 and 2 o'clock position.

The respective transverse and preferably formed as adhesive tape 28 connecting strips 24, 27 is applied to the second tail 23 and the web beginning 22 at rest or rotating support roller.

After the production of the full-value connection at the connection point 25, the winding machine 1 can be run up to production speed and the material web 2 can be continuously wound onto the winding roller 3.

In summary, it should be noted that the invention enables a fast and secure generation of a connection point in the reeling of a material web.

LIST OF REFERENCE NUMBERS

1

Device (winding machine)

2

web

3

reel

4

"Banner, flag"

5

winding bed

6

king roll

7

king roll

7.1

roll surface

8th

Diameter measuring device

9

Auflagenip

10

Auflagenip

11

The End

12

Facility

13

Under pressure zone

14

railway rind

15

knife

16

Laser pointer (auxiliary device)

17

control device

18

(First) train end

19

clamp

20

mainspring

21

Cross cutting unit

22

web start

23

(Second) tail

24

(First) connection strip

25

junction

26

Facility

27

Second connection strip

28

duct tape

D

diameter

L

Running direction (arrow)

P

position

Claims (21)

1. Method for producing a splice (25) on a wound roll (3), which rests on a roll (7) in a winding machine (1) and forms a contact nip (10) with the roll (7), in which a torn material web (2) is severed in each case on the wound roll (3), producing a web end (23), and in a feed area, producing a web start (22), in such a way that the web end (23) and the web start (22) are located adjacent to each other, and that the web end (23) and the web start (22) are joined to each other on one side, in particular the underside, by means of a joining strip (24) running transversely,
   characterized
   in that the material web (2) resting on the wound roll (3) is severed, producing a first web end (18) and a web tail (14) in a position (P) the distance of which from the contact nip (10) on the roll (7) is exactly the same as the distance to a device (12) arranged on the roll (7) for temporarily gripping the material web (2) inserted into the contact nip (10),
   in that the first web end (18) is preferably fixed to the wound roll (3),
   in that, after that, the wound roll (3) is rotated in the running direction (L) of the material web (2) for the purpose of removing the web tail (14) produced,
   in that the new material web (2) is brought onto the roll (7) and gripped temporarily by the device (12),
   in that the first web end (18), preferably fixed to the wound roll (3), is detached and brought to the roll (7),
   in that the new material web (2) and the first web end (18) are severed at the same time or with an offset in time by means of a transverse severing device (21), producing a second web end (23) and a web start (22), in such a way that the second web end (23) and the web start (22) are located adjacent to each other,
   in that at least the severed first web end (18) is removed, and
   in that the second web end (23) and the web start (22) are joined to each other on one side, in particular the underside, by the joining strip (24) running transversely.
2. Method according to Claim 1,
   characterized in that
   the position (P) at which the material web (2) is to be severed on the wound roll (3) is indicated by an auxiliary device (16).
3. Method according to Claim 2,
   characterized in that
   the position (P) is indicated without contact.
4. Method according to Claim 3,
   characterized in that
   a laser pointer is used to indicate the position (P) .
5. Method according to one of the preceding claims,
   characterized in that
   the device (12) for temporarily gripping the material web (2) introduced produces a vacuum which can preferably be controlled/regulated and which acts in such a way that the material web (2) inserted is held on the roll (7).
6. Method according to one of the preceding claims,
   characterized in that
   the web tail (14) produced is fixed to at least one clamp (19) that is acted on directly or indirectly by a tension spring (20), and is thus removed as the wound roll (3) is rotated in the running direction (L) of the material web (2).
7. Method according to one of the preceding claims,
   characterized in that
   the material web (2) inserted is cut to machine width by means of a cutting device before it is brought over the stationary roll (7).
8. Method according to one of the preceding claims,
   characterized
   in that before the new material web (2) is brought up, the roll (7) is rotated counter to the running direction (L) of the material web (2),
   in that, after that, the new material web (2) is brought over the said roll and
   in that they are moved together in the running direction of the roll (7) until, following the transverse severing of the new material web (2) by means of the transverse severing device (21), the second web end (23) and the web start (22) are located adjacent to each other.
9. Method according to one of the preceding claims,
   characterized in that
   the second web end (23) and the web start (22) are produced by one and the same transverse severing device (21).
10. Method according to one of the preceding claims,
    characterized in that
    the splice (25) produced is moved onward in the running direction (L) of the material web (2) until a second joining strip (27) for joining the second web end (23) and the web start (22) can be applied on the side of the material web (2) opposite the first joining strip (24).
11. Method according to Claim 10,
    characterized in that
    the two joining strips (24, 27) are applied to the second web end (23) and the web start (22) by one and the same device (26).
12. Method according to one of the preceding claims,
    characterized in that
    the joining strip (24, 27), running transversely and preferably formed as an adhesive tape (28), is applied to the second web end (23) and the web start (22) automatically or manually.
13. Method according to one of the preceding claims,
    characterized in that
    the joining strip (24, 27), running transversely and preferably formed as an adhesive tape (28), is applied to the second web end (23) and the web start (22) with the roll (7) stationary or rotating.
14. Apparatus (1) for winding up a material web (2) to form a wound roll (3), having a roll (7) on which the wound roll (3) rests as it is wound in a winding machine (1), a transverse severing device (21) [for producing a web start (22)] and a device (26) for applying a joining strip to a web end (23) and web start (22), which are located adjacent to each other
    characterized
    in that a diameter measuring device (8) is provided, which measures the diameter (D) of the wound roll (3) and which is connected to an auxiliary device (16) which indicates the position of a severing point for producing a first web end (18) on the wound roll (3), or a transverse severing device (21) which produces the first web end (18) on the circumference of the wound roll (3), and
    in that a device (12) is provided for temporarily gripping the material web (2) inserted.
15. Apparatus (1) according to Claim 14,
    characterized in that
    an auxiliary device (16) is provided for the preferably non-contact indication of the position (P) at which the material web (2) is to be severed on the wound roll (3).
16. Apparatus (1) according to Claim 15,
    characterized in that
    the auxiliary device is a laser pointer (16).
17. Apparatus (1) according to one of Claims 14 to 16,
    characterized in that
    the device (12) for temporarily gripping the material web (2) inserted is a vacuum zone that can preferably be controlled/regulated, is integrated into the roll (7) and acts on the roll surface (7.1) of the latter.
18. Apparatus (1) according to one of Claims 14 to 17,
    characterized in that
    at least one clamp (19) acted on directly or indirectly by a tension spring (20) is provided for fixing the web tail (14) produced and for removing the latter as the wound roll (3) is rotated in the running direction (L) of the material web (2) .
19. Apparatus (1) according to one of Claims 14 to 18,
    characterized in that
    a cutting device is provided for cutting the new material web (2) to machine width before it is brought over the stationary roll (7).
20. Apparatus (1) according to one of Claims 14 to 19,
    characterized in that
    the transverse severing device (21) is also designed to produce the second web end (23).
21. Apparatus (1) according to one of Claims 14 to 20,
    characterized in that
    the device (26) for applying the first joining strip (24) is also designed to apply the second joining strip (27).

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