EP1127823B1 - Method for transfering a material web and winding device for winding a roll of material web - Google Patents

Description

The invention relates to a method for transferring a Material web from one in a changing bed, the by at least a first and a second carrier roller is formed, lying reel on a new one Roll core, in which the material web cuts and the end thus formed on the winding roll and the Beginning on the roll core, being the Material web is fed into the changing bed from above. The invention further relates to a winding device for winding a material web into a winding roll with a changing bed made by at least one first and a second support roller is formed, a separating device, an adhesive applicator and a Ejection device, the changing bed being an entry path which runs above the first support roller, the separator is arranged in the changing bed and the ejection device has a holding device, which the web of material on the first support roller holds.

US 3 918 654 A shows a method and an apparatus of the type mentioned at the beginning. One in a changing bed lying web roll is wrapped when finished is, via the outlet-side support roller from the Ejected changing bed. The material web stretched over the two support rollers. On the inlet side The material web is held on the support roller. A Cutting device is clamped from below into the Material web retracted and parallel to the axial direction the support rollers reciprocated around the web to separate. The separation takes place between two Splices.

The invention is based on a paper web described as an example of a material web. she is however, basically also with other material webs Applicable to making salable and manageable Winding rolls must be wound up. at the winding rolls are larger winding rolls, their width in the range of 0.3 to 3.8 m and their Diameter is in the range of 0.8 to 2.5 m.

In one of the last manufacturing steps, if necessary after cutting to the desired one Wide, to be wound into winding rolls. If this is done in a changing bed, it is possible several winding rolls lying axially next to each other, to wrap at the same time. In this case it is for Slitting used slitter just before Changing bed arranged.

Paper webs become almost endless in a paper machine produced. However, a winding roll can only do one Record the finite length of the paper web. It is therefore from time to time necessary to interrupt the winding process, to cut the paper web, the resulting Fix the end on the winding roll and the To attach to a new roll core. In which Roll core is usually a cardboard tube.

It is known to do this, the paper web between the end and perforate the beginning, the perforating already a certain distance in front of the actual winding device can be done, and then the separation process by causing the winding roll to come out of the winding bed is expelled. Here the paper web breaks by. The beginning of the paper web is already through the end of the paper web up to the changing bed or at least pulled close to the changing bed.

However, such a technique can only be carried out up to certain grammages of up to approximately 100 g / m ² . In the case of thicker material webs, for example cardboard, cutting through with the aid of a perforation is no longer safe enough. In many cases, such a procedure also requires that the material web is inserted from below into the gusset between the two support rollers. This is a relatively complicated web guide, which also has the disadvantage that compressed air relief of the winding roll is made more difficult. With such compressed air relief, the compressed air would also get between the incoming material web and the circumference of the winding roll and negatively influence the winding hardness, which one actually wants to avoid.

The invention is based, with simpler the task To keep the web guide short the time for transfer.

This task is carried out in a method of the type mentioned at the beginning Art solved in that the winding roller at Separate to form a gap to the first support roller is tilted towards the changing bed and the material web is cut in the gap.

On the one hand, this simplifies the web guidance and keeps it but on the other hand the possibility of the material web reliably at a precisely defined point, namely in the gap between the winding roller and the support roller to sever. This is the beginning of the material web already nearby or even at the entrance of the changing bed, so that you only have a few measures must ultimately make the start so far into that Introduce changing bed that the new roll core on it can be attached. Creating the gap between the first carrier roller and the winding roller allows that you have a separator, such as a the axially extending knife-extending knife, passes through the material web. This allows a clean and clearly defined cut that also for thicker material webs, cut with the desired accuracy.

The material web is preferably held when the Winding roll and cutting the material web on the first support roller and rotates the first support roller when tilting the winding roll. On the one hand, the Fixed the beginning of the material web on the support roller, see above that after cutting it easily into the changing bed can bring in. By turning the support roller on the other hand, one prevents inadmissible tension in the material web when the winding roll is tilted. If you tilt the winding roll and twist it matches the first carrier roller accordingly, then there are short free trains that have a certain amount Have tension so that you can cut quickly and precisely by retracting a knife can.

It is preferred that the material web is viewed from below severed. So you can get the one you need Separating device during winding in the changing bed hold so that it does not bother, but to separate is available with a short movement.

It is preferable to turn the second one when cutting King roll. This creates a certain tension generated in the web of material that continues the cutting simplified.

It is preferable to create two before cutting Adhesive surfaces on the material web that run in the direction of travel have a distance from each other and cuts through the Material web at this distance. The two adhesive surfaces serve the end of the web of material on the winding roll and the beginning of the material web on the roll core to fix. By making a distance between provides these two adhesive surfaces prevented to stick the material web to the knife or the separation device and contamination of the separation device.

It is advantageous to make the first adhesive surface in the running direction much longer than the second adhesive surface. The first adhesive surface serves the end of the material web to attach to the circumference of the winding roll. Reliable gluing is a must here important because this bond is basically the only one Attachment of the end of the material web to the circumference the winding roll is. The beginning of the web is on the other hand, not only on the roll core due to the adhesive surface recorded. Rather, this only serves at the beginning of the winding process as the only connection. After a few Rotations of the roller core then hold it wound winding layers at the beginning of the material web Roll core firmly.

The winding roll is preferably after cutting ejected from the changing bed and the beginning of the material web conveyed into the changing bed at the same time. By synchronizing both movements, time can be saved. The expulsion must but not immediately after cutting. The role is expedient for so long rotated further until the glued web end between the nip the roller and the second support roller. Only then will the role be launched, starting with the material web at the latest with this ejection, if necessary but also encouraged when turning on becomes.

The start of the material web is advantageously at the first carrier roller until the roller core lies against the material web. This saves you one complicated new introduction of the material web in the Winder.

The task is also in a winding device solved type mentioned, in that the separating device to the inlet side of the material web is movable into a gap between the first support roller and the winding roll tilted towards the changing bed is formed.

It is with such a winding device possible to cut the web of material with the help the ejection device tipping something out of the changing bed, to create the desired gap at the same time but the material web on the first carrier roller to hold the tension you want to cut maintain or generate in the material web.

The first support roller is preferably synchronous with the ejection device movable. Since the material web on the first support roller with the help of the holding device you can make sure here that the material web conveyed when moving the ejector becomes. This can be used to ensure that the Cutting the material web in a defined way Shape takes place. The web of material breaks not before cutting off. this has particular advantages if the dividing line between the beginning and end of the material web as precisely as possible between individual adhesive surfaces should run.

It is preferred that the ejection device a Has lever that about the axis of the first support roller pivotable and fixable relative to the first support roller is. If the lever opposite the first carrier roller is set, then the ejector moves without additional measures in sync with the Carrier roller and vice versa, i.e. with a movement of the Ejection device used to tilt the winding roll leads out of the winding bed, the first carrier roller in adjusted accordingly.

The ejection device advantageously has a Control device that the ejector after Abutment on the winding roll for a predetermined distance moved on and then stops. With that you reach the desired tilting movement, i.e. the winding roll remains with her main focus still in the changing bed, but forms with the first support roller a nip through which the Separator can be moved.

Preferably, the ejector essentially has one clamping roller movable radially to the first carrier roller on. With the pinch roller, the material web can be easily fix on the first carrier roller.

It is preferred that the pinch roller is arranged on the lever is. This results in the desired synchronous Movement between the material web, the first carrier roller and the ejector.

Fig. 1 bis 6

verschiedene Phasen beim Überleiten einer Materialbahn von einer Wickelrolle auf einen Rollenkern.

The invention is described below with reference to a first embodiment in conjunction with the drawing. Show here:

1 to 6

Different phases when transferring a material web from a winding roll to a roll core.

Fig. 1 shows a roll winding device 1 with a first support roller 2 and a second support roller 3, the together form a changing bed 4. In the changing bed 4 a winding roll 5 rests by winding one material web 6 tapering over the first support roller 2, for example a paper web is formed. At a Such double carrier roll winder can be axial several winding rolls 5 in succession at the same time be wound, for example, when the Roll winding device 1 a not shown Slitter is connected upstream.

If now, as shown, the winding roll 5 its desired Has reached diameter, you have to the material web cut through and the end formed determine the circumference of the winding roll 5 and the resulting new beginning with a roll core 20 (Fig. 6) connect.

In order to cut through the material web 6, the roll winding device has 1 a separation device 7, the a knife which may be curved in the circumferential direction 8, which is attached to a lever 9 which around the axis 10 of the first support roller 2 is pivotable. Of course, with longer support rollers you get both Provide such a lever 9 on the end faces.

When winding, the separator 7 rests in or below of the winding bed 4, that is between the two support rollers 2, 3, where it doesn't bother you. The web of material 6 runs from above over the first support roller 2 in the changing bed 4, so does not come into conflict with the separating device 7.

To prepare for cutting the material web 7 is first an adhesive application device 11 in Operation set in the direction of the web a first adhesive surface 12 and a second adhesive surface 13 generated on the material web 6. The first adhesive surface 12 is essential here in the running direction extended further than the second adhesive surface 13. Between the two adhesive surfaces 12, 13 remain uncovered Strip 14.

An ejection device 15 has an ejection roller 16 and a pinch roller 17 mounted on a lever 18 are that about the axis of rotation 10 of the first Carrier roller 2 is pivotable. The pinch roller 17 is here essentially in the radial direction to the first Carrier roller 2 movable to and away from it.

To initiate the separation process will look like this Fig. 2 can be seen, the winding roll 5 initially turned far that the adhesive surface 12 the incoming material web 6 sets on the circumference of the winding roll 5. there the material web 6 has been advanced so far that the second adhesive surface 13 ran past the pinch roller 17 is. The pinch roller 17 is on the material web 6 lowered and clamps the material web the first support roller 2 fixed. By pivoting the Lever 18 pushes the ejection roller 16 the winding roller 5 something to the side so that it is slightly off the changing bed 4 tilts out, but due to the rotatably mounted Ejection roller 16 can be rotated further. By the tilting becomes a gap 19 between the first support roller 2 and the winding roll 5 formed. This gap 19 is traversed by the material web 6, wherein between the material web roll 5 and the first support roller 2 short "Free web trains" arise in which the material web 6 is kept under a certain tension. The If necessary, voltage can be controlled by that the second support roller 3 with a certain advance is driven relative to the first support roller 2.

The knife 8 is now in the tensioned material web 6 retracted and cut by pivoting the lever 9 the material web 6 in the gap 19. If several Winding rolls 5 have been wound at the same time, then all material webs are also cut 6 essentially simultaneously. The cut must not at the narrowest point of the gap 19. It depends among other things on the exact position of the knife 8 from. In any case, with the knife 8, that dips into the tensioned web of material 6, clean Dividing lines largely independent of the thickness and the Achieve basis weight of the material web 6 to be wound. 3A shows a detail Y here Fig. 3. The severing can still be done if necessary improve something if you briefly the second support roller 3 set in rotation. The winding role turns 5 on the second support roller 3 and the ejection roller 16th

The separation process takes place in the strip 14, which is not has been provided with adhesive, i.e. between the two adhesive surfaces 12, 13. This is particularly from 3 and 4 can be seen. 4a shows a detail X from Fig. 4, namely the knife 8 immediately after cutting the material web 6.

The separating device 7 is again after cutting in its basic position between the two support rollers 2, 3 pivoted back (Fig. 5). Another one Swiveling the lever 18, the winding roll 5 is off the changing bed 4 tipped out, specifically over the second Carrier roller 3. Simultaneously with this movement of the Lever 18, the first support roller 2 is rotated so that the material web 6 with the second adhesive surface 13 likewise is advanced. This is the simplest Case in that the lever 18 against the first support roller 2 is set. In this case ensures that the pinch roller 17 is always together rotates with the first support roller 2 and therefore none Friction between the material web 6 and the first Carrier roller 2 is created.

If the pinch roller 17 against the support roller 2 partially looping web pressed and the swivel lever 18 is then pivoted clockwise, then the material web 6 is inevitably advanced. The Swivel path of the pivot lever 18 depends on Diameter of the winding roll 5 from. The smaller this Diameter, the larger the swivel path. The Swivel path also determines the extent to which that new web end is advanced.

If the roll diameter remains constant, then the system can be set up so that the glued The beginning of the web always comes to the right place. In In practice, however, it often happens that the Roll diameter changes. In this case, the glued Tip "be readjusted". For example by doing the system Swivel lever 18 / pinch roller 17 / support roller 2 accordingly forwards or backwards.

Alternatively, you can use the second glue point from drive close to your target position from the start. The Pinch roller 17 would also in this case against the support roller 2 pressed and the lever 18 then clockwise pivoted. The support roller 2 should, however do not turn. The result would be that the pinch roller 17 on the wrap-around roller 2 Roll of material 6 rolls. The material web 6 itself would not be moved under these circumstances. Much more would the pinch roller 17 approach the glue point. A possibly necessary "repositioning" the gluing point would then have to be or retracting the system swivel lever 18 / pinch roller 17 / carrier roller 2. In any case, however ensured that the web of material in a tight temporal connection with the ejection of the role is advanced.

By practically simultaneously with the ejection the winding roll 5 from the winding bed 4 the feed of the At the beginning of the material web 6 with the second adhesive surface 13 takes place in the changing bed 4, time is saved. you can therefore, as shown in Fig. 6, immediately after ejecting the winding roll 5 from the Insert a roll core 20 into the changing bed 4, which thereby comes into contact with the second adhesive surface 13 is coming. This marks the beginning of the material web 6 on the roll core 20, for example a winding tube made of cardboard, and the wrapping process for one new winding roll can begin.

Claims (14)

1. Method of transferring a web (6) from a reel (5), lying in a winding bed (4) which is formed by at least a first and a second carrier roll (2, 3), to a new core, in which the web (6) is severed and the end formed as a result is fixed to the reel (5) and the start is fixed to the core, the web (6) being led into the winding bed (4) from above, characterized in that the reel (5) is tilted with respect to the winding bed (4) as it is severed, forming a gap to the carrier roll (2), and the web (6) is severed in the gap.
2. Method according to Claim 1, characterized in that, as the reel (5) is tilted and the web (6) is severed, the web (6) is held firmly on the first carrier roll (2) and the first carrier roll (2) is rotated as the reel (5) is tilted.
3. Method according to Claim 1 or 2, characterized in that the web (6) is severed from below.
4. Method according to Claim 3, characterized in that the second carrier roll (3) is rotated during the severing action.
5. Method according to one of Claims 2 to 4, characterized in that, before the severing action, two adhesive areas (12, 13) are produced on the web (6) at a distance from each other in the running direction, and the web (6) is severed in this distance (14).
6. Method according to Claim 5, characterized in that the first adhesive area (12) in the running direction is made substantially longer than the second adhesive area (13).
7. Method according to one of Claims 1 to 6, characterized in that the reel (5) is ejected from the winding bed (4) after the severing action and the start of the web (6) is simultaneously conveyed into the winding bed (4).
8. Method according to one of Claims 1 to 7, characterized in that the start of the web (6) is held firmly on the first carrier roll (2) until the core (20) is resting on the web (6).
9. Winder for winding a web (6) to form a reel (5), comprising a winding bed (4) which is formed by at least a first and a second carrier roll (43), a severing device (7), an adhesive application device (11) and an ejection device (15), the winding bed (4) having an inlet path which runs over the first carrier roll (2) at the top, the severing device (7) being arranged in the winding bed and the ejection device (15) having a holding device (17) which holds the web (6) firmly on the first carrier roll (2), characterized in that the severing device (7) can be moved towards the inlet side of the web (6) into a gap which is formed between the first carrier roll (2) and the reel (5) tilted with respect to the winding bed (4).
10. Winder according to Claim 9, characterized in that the first carrier roll (2) can be moved synchronously with the ejection device (15).
11. Winder according to Claim 10, characterized in that the ejection device (15) has a lever (18) which can be pivoted about the axis (10) of the first carrier roll (2) and can be fixed with respect to the first carrier roll (2).
12. Winder according to one of Claims 9 to 11, characterized in that the ejection device (15) has a control device which moves the ejection device (15) onwards by a predetermined distance following contact with the reel (5) and then stops it.
13. Winder according to one of Claims 9 to 12, characterized in that the ejection device (15) has a clamping roller (17) which can be moved substantially radially with respect to the first carrier roll (2).
14. Winder according to Claim 13, characterized in that the clamping roller (17) is arranged on the lever (18).

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