EP0886620A1

EP0886620A1 - Device for continuously winding up longitudinally cut paper webs with rolls changed automatically at the machine speed

Info

Publication number: EP0886620A1
Application number: EP97907097A
Authority: EP
Inventors: Helmut Fröhlich
Original assignee: Voith Sulzer Finishing GmbH; Voith Sulzer Papiertechnik Patent GmbH
Current assignee: Voith Patent GmbH
Priority date: 1996-03-13
Filing date: 1997-03-13
Publication date: 1998-12-30
Anticipated expiration: 2017-03-13
Also published as: WO1997033821A1; DE19609802A1; US6406417B1; DE59701038D1; EP0886620B1

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

Device for the continuous reeling of slit paper webs with automatic reel change at machine speed

The invention relates to a device and a method for the continuous winding of longitudinally cut paper webs with automatic roll change at machine speed.

For economic reasons, paper is now being produced to a considerable extent continuously on production machines with a large working width. For most applications, the paper webs produced are too wide and must therefore be subdivided into usable dimensions. So-called winder are used for this.

In the case of paper webs to be wound up without axes, which consist of slit sections of a wide paper web produced on the production machine, it has so far not been possible to change the fully wound partial web rolls in the rewinder according to the slitter at machine speed if the original paper web is also divided in length or if section-wide rolls with a smaller diameter than the original roll have to be manufactured. This means that the roll cutter and the associated winding device must be shut down and stopped for each roll change. For this reason, the slitter cannot be integrated into the continuous paper production. It is therefore the only discontinuously operating machine in every paper mill, which is arranged separately and has a corresponding number of rejects and personnel requirements.

It is therefore the task to propose a device and a method with a view to a constant product quality and the integration of the roll cutter in the continuous papermaking process, with which these goals can be achieved and with which rejects and personnel requirements can be further reduced.

ERSATZBLAH (RULE 26) To solve this problem, a device of the type mentioned at the outset is proposed, which is characterized by at least two support rollers arranged separately behind a longitudinal cutting device, at least one pair of disks per support roller, which are arranged continuously to the support rollers, are rotatably supported independently of the support rollers and their axial disc spacing is adjustable to the width of the paper webs to be wound up, at least two winding devices per pair of disks, which in the

Disc pairs are guided radially adjustable and each include a core drive for cardboard tubes to be inserted and by at least one device for separating a cut to width

Paper web transversely to the conveying direction and for winding the new one

At the beginning of the web on a new cardboard sleeve accelerated to machine speed.

Advantageous refinements and developments of the device according to the invention are described in claims 2-10.

The process for the continuous winding of longitudinally cut paper webs with automatic roll change at machine speed by means of a device according to one of claims 1-10 is characterized in that a first winding device of the pairs of disks involved in the winding process is equipped with a cardboard tube so that the web starts of those cut to width Paper webs are attached or wrapped on the cardboard tubes, that the support rollers and the cardboard tubes are raised to machine speed, that the discs are rotated to the next position during the winding process, that a second winding device is fitted with a cardboard tube that the cardboard tubes are at machine speed be accelerated that when the desired winding diameter is reached the paper web is 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 are rotated into the next position during the winding process and that the wound paper web is braked, removed from the first winding device and the latter is fitted with a new cardboard tube.

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

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

1 is a plan view of a first embodiment of the invention, each with two winding devices per pair of disks,

Fig. 2 is a side view of a second embodiment of the

Invention with three winding devices per pair of discs, and

Fig. 3 shows a detail of the winding device.

The exemplary embodiment according to FIG. 1 comprises two support rollers 1, 2 arranged one behind the other in the transport direction of the paper web 15, which are aligned with one another in the usual manner in a machine frame and are arranged such that they can rotate. Details of the mounting and the drives of the support rollers are not shown in order to make the features belonging to the invention more apparent. Each support roller 1, 2 has a pair of disks 3, 4 or 3 ', 4', which is mounted concentrically to the support rollers 1, 2 and rotatable independently of them and whose axial distance can be adjusted to the width of the paper webs 15 to be wound up. In the example shown, an original paper web is the width of the paper making machine onto a reel cutter, not shown, in two paper webs of the same width 15 cut longitudinally, the left paper web being wound up by the first winding device 5, 6 seen in the conveying direction and the right one on the second winding device 5, 6. Drive and mounting of the disk pairs 3, 4 and 3 ', 4' are from the already mentioned Reasons not shown.

The exemplary embodiment is also simplified insofar as the overall system is only designed for two paper webs 15. Of course, the support rollers 1, 2 can be made longer or two or more pairs of disks 3, 4, 3 ', 4' can be arranged per support roller 1, 2 if the original paper web is wider than shown or in more than two paper webs to be separated. In this case, the pairs of disks are offset transversely to the paper web in such a way that the winding devices for the first, third, fifth, etc. paper web cooperate with the one support roller 1 and the winding devices 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 for accommodating the pairs of discs and the winding devices is not sufficient. For such cases, the illustrated embodiment can also be modified in such a way that more than two support rollers are provided and that, for example, the paper webs 1, 4, 7 a first, the paper webs 2, 5, 8 a second and the paper webs 3, 6, 9 can be assigned to a third backup roller.

In the embodiment shown in FIG. 1, two winding devices 5, 6 are provided for each pair of disks 3, 4, 3 ', 4' which are offset by 180 ° to one another. They are mounted in a left and a right guide 17, so that it is possible to adjust them radially, for which known pneumatic, hydraulic or electromotive drives can be used. The diameter of the disk pairs 3, 4, 3 ', 4' selected so that the largest possible diameter of a wound paper web 16 always remains within the outer circumference 11 so that the pairs of disks 3, 4, 4 ', 4' can be pivoted past the machine frame required for their storage. Only in the removal position can the wound paper webs 16 be adjusted radially outward.

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

2 shows an embodiment of the invention with two support rollers 1 and 2 and two pairs of discs 3, 4, 3 ', 4', in contrast to FIG. 1, three winding devices 5, 6, 7 with core drives 8 are provided. Accordingly, this device has three different working positions, but otherwise does not differ from the example according to FIG. 1.

The machine frame 12 with the drive 13 for the disk pairs 3, 4, 3 ', 4' is also indicated, the machine frame 12 also being used for mounting the support rollers 1 and 2 and comprising devices (not shown) by means of which the distance between the disks 3, 4 or 3 ', 4' to one another can be adjusted to the respectively desired width of the paper webs 15 to be wound up. Details of the storage and adjusting devices are not shown.

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

A completely wound paper roll 16 is expediently removed at the bottom in the position shown between the two guides of the machine frame 12 for the disk pairs which extend parallel to the support roller axis, for which purpose the wound paper web 16 can be moved radially further outward than when winding and pivoting the disk pairs 3, 4 3 ', 4' when changing the working positions.

3 shows an enlarged detail from FIGS. 1 and 2. Each disc 3, 4 has a radially arranged guide 17 for the winding device 5 consisting of core drive 8, angular gear 8 'and mandrel 14, which is by means of a drive, not shown, which can be pneumatic, hydraulic or electromotive, on the one hand can be pressed radially against the support roller and on the other hand can be moved radially outwards to remove a finished paper roll 16 or to fit a new cardboard sleeve 9. Since the distance between the disks 3, 4, 3 ', 4' is set to a certain web width, the mandrel 14 or the entire winding device 5 must be designed to be axially displaceable in order to attach a cardboard tube 9 or to remove a wound paper web 16. Here, constructions familiar to the person skilled in the art can be used without having to make almost any further explanations.

The device according to the invention is used in such a way that a first winding device 5 of the disk pairs 3, 4, 3 ', 4 "involved in the winding process is equipped with a cardboard sleeve 9 that the Web beginnings of the paper web 15 cut to width are fastened or wound onto the cardboard sleeves 9 and that the support rollers 1, 2 and the cardboard sleeves 9 are then raised to machine speed by means of the associated drives. In the case of a slitter not integrated in the paper production process, this is the design speed of the slitter or another speed selected for the respective case. In the case of a slitter integrated into the paper making process, in which the advantages of the invention are really brought to the fore, this is the web speed of the paper making.

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

According to FIG. 2, a third winding device 7 and, accordingly, a third working position are provided, so that the third cardboard tube 9 can be plugged on and the first finished paper rolls removed while the second roll is still being wound up. This is associated with organizational advantages and an appropriate equalization of the work processes.

When a specified roll diameter is reached, the paper web 15 is cut off transversely to the conveying direction and the new beginning of the web is wound onto the next cardboard sleeve 9, which of course was previously accelerated to machine speed. In the last position, the finished paper webs 16 are braked and out of Take-up device removed so that it is free for receiving a new cardboard tube 9.

By arranging two or more winding devices in a pair of discs mounted coaxially to the support rollers, it is possible to operate the slitter continuously because paper webs 15 of any length cut to width can be wound without the winding process having to be interrupted. New cardboard cores can be inserted, accelerated and brought into a position according to the turret principle, in which they can take up the new start of the web that is moving at machine speed. This has made it possible to integrate the slitter into the largely automated paper-making process. You no longer have to do the cutting to predetermined web widths "batchwise" with multiple starts and stops of the slitter rewinder, thus reducing not only the rejects, but also the personnel requirements. This makes it possible to produce paper webs of any width and length immediately after the wide, continuously operating paper production machines, i.e. from the original paper web, which is very wide and practically endless for economic reasons, paper webs of all desired widths and lengths can be produced without the need for intermediate winding and without a separate, i.e. winder that can only be operated in batches and is arranged outside the actual production line is required. Rather, the slitter rewinder can be fully integrated into paper production.

Claims

claims

1.Device for the continuous winding of longitudinally cut paper webs with automatic roll change at machine speed, characterized by at least two support rollers (1, 2) arranged separately behind a longitudinal cutting device, at least one pair of disks (3, 4, 3 ', 4') per support roller (1 , 2), which are arranged concentrically to the support rollers (1, 2), are rotatably mounted independently of the support rollers (1, 2) and whose axial disc spacing can be adjusted to the width of the paper webs (15) to be wound up, at least two winding devices (5 , 6, 7) per pair of discs (3, 4, 3 ', 4'), which are radially adjustable in the pairs of discs (3, 4, 3 ', 4') and each have a core drive (8) for cardboard tubes to be inserted (9 ) and by at least one device (10) for separating a paper web (15) cut to width transversely to the conveying direction and for winding the new beginning of the web at a machine speed accelerated new cardboard tube (9).

2. Device according to claim 1, characterized in that for each pair of discs (3, 4, 3 ', 4') three winding devices (5, 6, 7) arranged offset by 120 ° to one another are provided.

3. Apparatus according to claim 1 or 2, characterized in that the support rollers (1, 2) at the same height in the conveying direction of the paper webs (15) one behind the other and that their disc pairs (3, 4, 3 ', 4') offset transversely to the conveying direction are arranged to each other. 4. Device according to one of claims 1 to 3, characterized in that each support roller (1, 2), preferably each pair of discs (3, 4, 3 ',

4 ') a device (10) for separating and winding is provided.

5. Device according to one of claims 1 to 4, characterized in that the support rollers (1, 2) have a torque or web-train-controlled drive.

6. Device according to one of claims 1 to 5, characterized in that the disc pairs (3, 4, 3 ', 4') are mounted and guided on their outer circumference (11).

7. The device according to claim 6, characterized in that the pairs of discs (3, 4, 3 ', 4') are mounted in a machine frame (12) in which the support rollers (1, 2) are also mounted.

8. Apparatus according to claim 6 or 7, characterized in that the disc pairs (3, 4, 3 ', 4') have their own drive (13) for pivoting the winding devices (5, 6, 7) in different positions.

9. Device according to one of claims 1 to 8, characterized in that the winding devices (5, 6, 7) can be pressed radially inwards against the support rollers (1, 2).

10. Device according to one of claims 1 to 9, characterized in that the winding devices (5, 6, 7) have mandrels (14) for attaching the cardboard tubes (9).

11. A method for the continuous winding of longitudinally cut paper webs (15) with automatic roll change at machine speed, by means of a device according to one of claims 1 to 10, characterized in that a first winding device (5) of the pairs of discs (3, 4,) involved in the winding process 3 ', 4') is equipped with a cardboard sleeve (9), that the web beginnings of the paper webs (15) cut to width are fastened or wound onto the cardboard sleeves (9), that the support rollers (1, 2) and the cardboard sleeves ( 9) are brought up to machine speed so that the disks (3, 4, 3 ', 4') are rotated further into the next position during the winding process, so that a second winding device (6) is fitted with a cardboard sleeve (9) that the Cardboard tubes (9) are accelerated to machine speed so that when the desired winding diameter is reached, the paper web (15) is cut off transversely to the conveying direction and the new beginning of the web is wound on the second cardboard tube (9), that the disc pairs (3, 4, 3 ', 4') are rotated into the next position during the winding process and that the wound paper web (16) is braked from the first Take-up device (5) removed and the latter is fitted with a new cardboard tube (9).

12. The method according to claim 11, but with the proviso that in a device with three winding devices (5, 6, 7) per disc pair (3, 4, 3 ', 4') the latter rotated in succession in three positions offset by 120 ° to each other are, the first position for loading with a new cardboard tube (9), the second position for winding the paper webs (15) and the third for braking and removing the wound paper web (16).

13. The method according to claim 11 or 12, characterized in that the change of position of all the disk pairs involved (3, 4, 3 ', 4') and in particular the winding onto a new cardboard sleeve (9) on the different support rollers (1, 2) simultaneously is carried out.