EP0886620B1 - Device for continuously winding up longitudinally cut paper webs with rolls changed automatically at the machine speed - Google Patents

Abstract

The invention concerns a device for continuously winding up longitudinally cut paper webs with the rolls being changed automatically at the machine speed. The device is characterized by: at least two support rollers (1, 2) disposed separately after a longitudinal cutting arrangement; at least one disc pair (3, 4, 3', 4') per support roller (1, 2), the disc pairs being disposed concentrically to the support rollers (1, 2) and mounted so as to rotate independently of the support rollers (1, 2), the axial distance between the discs being adjustable to the width of the paper webs (15) to be wound up; at least two winding-up devices (5, 6, 7) per disc pair (3, 4, 3', 4') which are guided in a radially adjustable manner in the disc pairs (3, 4, 3', 4') and each comprise a core drive (8) for cardboard tubes (9) to be inserted; and at least one arrangement (10) for cutting a paper web (15), which has been cut to width, transversely to the feed direction and for winding the beginning of a new web on a new cardboard tube (9) which is accelerated to the speed of the machine.

Description

The invention relates to a device and a method for continuous winding of slit paper webs with automatic roll change Machine speed.

Such a device is known from DE-B-1 474 243.

Paper is continuously being used to a considerable extent today for economic reasons Production machines manufactured with a large working width. For most applications the paper webs produced are too wide and must therefore have usable dimensions be divided. So-called winder are used for this.

In the case of paper webs which are to be wound up without an axle and which are made up of longitudinally cut sections exist on the wide paper web produced on the production machine, so far it is not possible, the fully wound section rolls in the rewinder to change the slitter at machine speed if the original one Paper web should also be subdivided in length or when using section rolls smaller diameter than the original roll. The means that for each roll change the slitter and the associated rewinder shutdown and shutdown. For this reason, the Winder also cannot be integrated into the continuous paper production. He is therefore the only discontinuously operating machine in every paper mill is arranged separately and has a corresponding amount of committee and personnel.

It is therefore the task with regard to consistent product quality and on the integration of the roll cutter into the continuous papermaking process to propose a device and a method with which these goals are achieved can and with which committee and personnel requirements can be further reduced.

• wenigstens zwei hinter einer Längsschneideeinrichtung separat angeordnete Stützwalzen,
• wenigstens je ein Scheibenpaar pro Stützwalze, die kontinuierlich zu den Stützwalzen angeordnet sind, unabhängig von den Stützwalzen drehbar gelagert sind und deren axialer Scheibenabstand auf die Breite der aufzuwickelnden Papierbahnen einstellbar ist,
• wenigstens zwei Aufwickelvorrichtungen pro Scheibenpaar, die in den Scheibenpaaren radial verstellbar geführt sind und je einen Kernantrieb für einzulegende Papphülsen umfassen sowie durch
• wenigstens eine Einrichtung zum Trennen einer auf Breite geschnittenen Papierbahn quer zur Förderrichtung und zum Anwickeln des neuen Bahnanfangs an einer auf Maschinengeschwindigkeit beschleunigten neuen Papphülse.

A device of the type mentioned at the outset, which is characterized by

• at least two support rollers arranged separately behind a longitudinal cutting device,
• at least one pair of discs per support roller, which are arranged continuously to the support rollers, are rotatably mounted independently of the support rollers and whose axial disc spacing can be adjusted to the width of the paper webs to be wound,
• at least two winding devices per pair of discs, which are guided in the disc pairs in a radially adjustable manner and each comprise a core drive for cardboard tubes to be inserted, and by
• at least one device for separating a paper web cut to width transversely to the conveying direction and for winding the new beginning of the web on a new cardboard tube accelerated to machine speed.

Advantageous refinements and developments of the invention Device are described in claims 2-10.

The process for the continuous winding of slit Paper webs with automatic roll change at machine speed by means of a device according to any one of claims 1-10 characterized in that a first winding device on Pairs of disks involved in the winding process are fitted with a cardboard tube, that the web starts of the paper webs cut to width on the Cardboard tubes are attached or wound that the backup rollers and the Cardboard cores are run up to machine speed that the Discs in the next position during the winding process be rotated further that a second winding device with a Cardboard tube is loaded that the cardboard tubes at machine speed be accelerated that when the desired winding diameter is reached the paper web cut off transversely to the conveying direction and the new beginning of the web is wound on the second cardboard tube that the disc pairs during of the winding process to the next position and that the wound paper web braked, from the first winding device removed and the latter is fitted with a new cardboard tube.

Advantageous modifications of these procedural measures are in the Claims 12 and 13 described.

Fig. 1

eine Draufsicht eines ersten Ausführungsbeispiels der Erfindung mit je zwei Aufwickelvorrichtungen pro Scheibenpaar,

Fig. 2

eine Seitenansicht von einem zweiten Ausführungsbeispiel der Erfindung mit je drei Aufwickelvorrichtungen pro Scheibenpaar, und

Fig. 3

eine Einzelheit der Aufwickelvorrichtung.

Further details are explained in more detail with reference to the exemplary embodiments shown in FIGS. 1 to 3. Show it:

Fig. 1

2 shows a plan view of a first exemplary embodiment of the invention, each with two winding devices per pair of disks,

Fig. 2

a side view of a second embodiment of the invention, each with three winding devices per pair of discs, and

Fig. 3

a detail of the winder.

The embodiment of FIG. 1 includes two in the transport direction Paper web 15 support rollers 1, 2 arranged one behind the other in the usual Aligned in a machine frame and rotatably mounted are arranged. Details of the storage and drives of the backup rolls are not shown to clarify the features belonging to the invention to emerge. A pair of disks 3, 4 belongs to each support roller 1, 2 or 3 ', 4', which is concentric with the support rollers 1, 2 and independent of this is rotatably mounted and its axial distance to the width of the paper webs 15 to be wound is adjustable. In the example shown is an original paper web the width of the paper making machine on a reel cutter, not shown, in two paper webs of the same width 15 cut longitudinally, the left paper web from the in the conveying direction seen first winding device 5, 6 and the right one the second winding device 5, 6. Drive and storage of the Disc pairs 3, 4 and 3 ', 4' are not for the reasons already mentioned shown.

The exemplary embodiment is also simplified insofar as the overall system is only designed for two paper webs 15. Of course you can Support rollers 1, 2 run longer or two can be used for each support roller 1, 2 or more pairs of discs 3, 4, 3 ', 4' if the original Paper web is wider than shown or in more than two paper webs to be separated. In this case, the disc pairs are transverse to Paper web staggered in such a way that the winding devices for the first, third, fifth, etc. paper web with the one support roller 1 work together and the rewinder for the second, fourth, sixth etc. paper web with the other backup roller 2.

If relatively narrow paper webs are to be wound up, it may be sufficient the width to accommodate the pairs of discs and the Rewinder not out. For such cases this can be shown Embodiment can also be modified in such a way that more than two back-up rollers are provided and that the paper webs a first, a second and be assigned to a third backup roller.

In the exemplary embodiment shown in FIG. 1, 3, 4, 3 ', 4' each arranged two offset by 180 ° to each other Winding devices 5, 6 are provided. They are in left and one each right guide 17 mounted so that it is possible to adjust it radially, for which known pneumatic, hydraulic or electric motor drives can be used. The diameter of the disk pairs 3, 4, 3 ', 4' chosen so that the largest possible diameter of a wound Paper web 16 always remains within the outer circumference 11 so that the Disc pairs 3, 4, 4 ', 4' on the necessary for their storage Machine frame can be swung past. Only in the Removal position, the wound paper webs 16 can continue radially be adjustable to the outside.

In the upper part of the illustration, the winding device 5 is attached Cardboard sleeve 9 shown, while the mandrels 14 in the lower part Winding device 5 can be seen. The bottom one Winding devices 6 carry a completely wound paper web 16. Dashed lines indicate the edges of the paper webs 15, which are below the device according to the invention are supplied.

2 shows an embodiment of the invention with two support rollers 1 and 2 and two pairs of disks 3, 4, 3 ', 4' are shown, with the difference 1, three winding devices 5, 6, 7 with core drives 8 are provided. Accordingly, this device has three different ones Working positions, but otherwise does not differ from the example 1.

The machine frame 12 with the drive 13 for the is also indicated Disc pairs 3, 4, 3 ', 4', the machine frame 12 also for storage the back-up rolls 1 and 2 are used and comprise devices not shown, by means of which the distance between the disks 3, 4 and 3 ', 4' to each other on the desired width of the paper webs 15 to be wound is adjustable. Details of the storage and adjustment devices are not shown.

Also indicated is a device 10 known per se for separating one paper web 15 cut to width transversely to the conveying direction and to Wrapping the new start of the web at a machine speed accelerated cardboard sleeve 9. The device 10 is radially between the Disc pairs 3, 4, 3 ', 4' retractable and extendable. It works in a known manner with a compressed air pulse that cuts through the paper web and the new one Blows the beginning of the web against the empty cardboard sleeve 9, which suitably with an adhesive is layered so that the winding process without interference can run.

A fully wound paper roll 16 is conveniently below in the shown position between the two parallel to the support roller axis extending guides of the machine frame 12 for the disc pairs removed, for which purpose the wound paper web 16 radially further outwards is movable than when winding and swiveling the disk pairs 3, 4 3 ', 4 'when changing the working positions.

FIG. 3 shows an enlarged detail from FIGS. 1 and 2. Each Disc 3, 4 has a radially arranged guide 17 for the Core drive 8, angular gear 8 'and mandrel 14 existing Rewinder 5, which by means of a drive, not shown, the can be pneumatic, hydraulic or electric motor, on the one hand radial can be pressed against the backup roller and on the other hand to remove a finished one Paper roll 16 or for attaching a new cardboard sleeve 9 radially after can be moved outside. Since the distance between the disks 3, 4, 3 ', 4' a certain web width is set, the mandrel 14 or else entire winding device 5 for attaching a cardboard tube 9 or Removal of a wound paper web 16 is axially displaceable his. Constructions familiar to the person skilled in the art can be used here without having to make almost any further explanations.

The device according to the invention is used in such a way that one first winding device 5 of those involved in the winding process Disc pairs 3, 4, 3 ', 4' is equipped with a cardboard sleeve 9 that the Web starts of the paper web 15 cut to width on the cardboard sleeves 9 attached or wrapped and that then the support rollers 1, 2 and Cardboard tubes 9 by means of the associated drives at machine speed be started up. With one not in the paper making process integrated slitter is the design speed of the Roll cutter or another one selected for the respective case Speed. With an integrated in the paper manufacturing process Slitter, in which the advantages of the invention really come into their own come, that's the web speed of papermaking.

While the paper webs 15 are wound onto the respective first cardboard tubes 9 the disc pairs 3, 4, 3 ', 4' in the next position be rotated further, i.e. 1 by 180 ° in the embodiment of FIG and in the embodiment according to FIG. 2 by 120 °. In this position the next winding devices 6 are fitted with cardboard tubes 9. In Fig. 1, this is also the position in which the wound up Paper webs 16 are removed from the device.

2 is a third winding device 7 and accordingly, a third working position is provided so that the attachment the third cardboard tube 9 and the removal of the first finished paper rolls can take place while the second roll is still being wound. With that organizational advantages and appropriate equalization of the Operations related.

If an intended roll diameter is reached, the paper web 15 becomes transverse separated from the conveying direction and the new start of the path to the next Cardboard tube 9 wrapped, which of course beforehand Machine speed was accelerated. In the last position the wound paper webs 16 are braked and out of Take-up device removed, so that it is free to accommodate a new cardboard sleeve 9.

By arranging two or more winding devices in one coaxial to the support rollers pair of discs it is possible to Operate slitter continuously because it is cut to width Paper webs 15 of any length can be wound up without the Winding process must be interrupted. New cardboard tubes can after introduced the revolver principle, accelerated and brought into a position in which they move the new one at machine speed Can start the web. This has made it possible for the Slitter in the largely automated papermaking process integrate. You do not have to cut to specified web widths more "batch-wise" with multiple starting and stopping of the slitter rewinder operate and thus reduce not only the committee, but also the Personnel requirements. It is possible to use paper webs of any width and Length immediately following the wide, continuously working To produce papermaking machines, i.e. out of out of economic Reasons very wide and practically endlessly manufactured original Paper webs can be paper webs in all desired widths and lengths be produced without intermediate winding and without that a separately, i.e. arranged outside the actual production line, only batch winder is required. The Rather, slitter reel can be fully integrated into paper making become.

Claims (13)

1. Apparatus for the continuous winding of longitudinally cut paper webs with automatic roll change at machine speed, with at least two supporting rollers (1, 2) arranged separately behind a longitudinal cutting device, characterised by

   at least one pair of discs (3, 4, 3', 4') to each supporting roller (1, 2), which are arranged concentrically with the supporting rollers (1, 2) and mounted rotatably independently of the supporting rollers (1, 2) and whose axial distance between discs is adjustable to the width of the paper webs (15) to be wound,

   at least two winding devices (5, 6, 7) to every pair of discs (3, 4, 3', 4'), which are guided radially displaceably in the pairs of discs (3, 4, 3', 4') and each include a core drive (8) for cardboard tubes (9) to be inserted, and by

   at least one device (10) for separating a paper web (15) cut to width, transversely to the direction of conveying, and for initially winding the new web beginning on a new cardboard tube (9) accelerated to machine speed.
2. Apparatus according to claim 1, characterised in that three winding devices (5, 6, 7) offset from each other by 120° are provided for each pair of discs (3, 4, 3', 4').
3. Apparatus according to claim 1 or 2, characterised in that the supporting rollers (1, 2) are arranged at the same level one behind the other in the direction of conveying the paper webs (15) and in that their pairs of discs (3, 4, 3', 4') are offset from each other transversely to the direction of conveying.
4. Apparatus according to any of claims 1 to 3, characterised in that for every supporting roller (1, 2), preferably for every pair of discs (3, 4, 3', 4'), a device (10) for separating and initial winding is provided.
5. Apparatus according to any of claims 1 to 4, characterised in that the supporting rollers (1, 2) have a torque-controlled or web tension-controlled drive.
6. Apparatus according to any of claims 1 to 5, characterised in that the pairs of discs (3, 4, 3', 4') are mounted and guided at their outer circumference (11).
7. Apparatus according to claim 6, characterised in that the pairs of discs (3, 4, 3', 4') are mounted in a machine frame (12) in which are also mounted the supporting rollers (1, 2).
8. Apparatus according to claim 6 or 7, characterised in that the pairs of discs (3, 4, 3', 4') have their own drive (13) for pivoting the winding devices (5, 6, 7) into different positions.
9. Apparatus according to any of claims 1 to 8, characterised in that the winding devices (5, 6, 7) can be pressed radially inwards against the supporting rollers (1, 2).
10. Apparatus according to any of claims 1 to 9, characterised in that the winding devices (5, 6, 7) have mandrels (14) for fitting the cardboard tubes (9) on.
11. Method for the continuous winding of longitudinally cut paper webs (15) with automatic roll change at machine speed, by means of an apparatus according to any of claims 1 to 10, characterised in that in each case a first winding device (5) of the pairs of discs (3, 4, 3', 4') involved in the winding operation is fitted with a cardboard tube (9), in that the web beginnings of the paper webs (15) cut to width are attached to or initially wound on the cardboard tubes (9), in that the supporting rollers (1, 2) and the cardboard tubes (9) are brought up to machine speed, in that the discs (3, 4, 3', 4') during the winding operation are rotated on to the next position, in that in each case a second winding device (6) is fitted with a cardboard tube (9), in that the cardboard tubes (9) are accelerated to machine speed, in that on reaching the desired roll diameter the paper web (15) is separated transversely to the direction of conveying and the new web beginning is initially wound on the second cardboard tube (9), in that the pairs of discs (3, 4, 3', 4') during the winding operation are rotated to the next position and in that the wound paper web (16) is braked and removed from the first winding device (5) and the latter is fitted with a new cardboard tube (9).
12. Method according to claim 11, but with the proviso that in an apparatus with three winding devices (5, 6, 7) to each pair of discs (3, 4, 3', 4') the latter are successively rotated into three positions offset from each other by 120°, the first position being used to fit a new cardboard tube (9), the second position to wind the paper webs (15) and the third to brake and remove the wound paper web (16).
13. Method according to claim 11 or 12, characterised in that the change of position of all the pairs of discs (3, 4, 3', 4') involved and in particular initial winding onto a new cardboard tube (9) is carried out simultaneously on the different supporting rollers (1, 2).

Images