DE19944704A1 - Method and device for severing a running material web - Google Patents

Abstract

The invention relates to a method for severing a running material web (10), in particular a paper web, in which the material web is successively wound onto a plurality of winding cores (12, 14), in particular a spool, and the winding is started in each case on a new winding core (12) , when a winding roll (16) formed on a previous old winding core (14) has reached a predetermined diameter, the new winding core (12) between a winding roller (18), in particular a support roller, and the old winding core (14), to which the Material web (10) is fed via the winding roller (18), brought and the running material web (10) is cut in front of the winding roller (18), the material web (10) by means of at least one cutting device which is approximately in a material web (10) parallel plane is moved relative to the material web (10) is completely severed. DOLLAR A The invention also relates to an apparatus for performing this method.

Description

The invention relates to a method for cutting a running Material web, in particular a paper web, in which the material web successively on several winding cores, in particular drum winds and each with winding on a new winding core is won if one formed on a previous old winding core Has reached a predetermined diameter, the new winding core between a winding roller, in particular a support roller, and the old winding core, to which the material web passes over the winding roller is guided, brought and the running material web in front of the winding roller is severed.

The invention also relates to a device for carrying out a such method with at least one cutting device.

Such separation methods and devices are for example in the Papermaking applied to the finished paper web without undersize the manufacturing process, d. H. without switching off the paper size shine, one after the other on several winding cores, which also act as reels be referred to wind up.  

It must be ensured that the by cutting the The new start of the material is created by the material web is performed to form a new winding roll on this.

From WO 97/48632 it is known to close the paper web in one area cut through, in which the paper web touches the winding roller, so that The paper web is cut on the winding roller.

It is also known by means of a swiveling machine pulp separating device between the new and the old winding core, d. H. behind the winding nip to punch in the paper web. The ent vertical cutting edge perpendicular to the web running direction problems with winding the new start of the web on the new one Guide the winding core.

It is also known from EP 0 658 504 B1 that the material web is behind the winding gap between the winding roller and the new winding core cut through, but it is not mentioned how this is done.

From DE 44 01 804 A1 it is known to egg in the way of a paper web ne separating device to move in, which in places traversy rendes knife includes as a separator. Furthermore, it is from this Publication known, the paper web by means of a knife only on one To weaken point and then completely using compressed air cut through. With the knife and the only weakening of the paper web is the Danger of uncontrolled tearing of the paper web.

It is an object of the invention, a method and an apparatus of the type mentioned to create an optimal winding of the enable new web start on the new winding core.

According to the invention this object is achieved in that the material web by means of at least one cutting device, which in one to the Ma material web is moved approximately parallel plane relative to the material web, is completely severed.

By completely severing the material web according to the invention Undefined tearing of the material web is prevented, so that the leading edge of the new path start always the same, definable Has shape and thus in a defined manner on the new winding core can be cited. Furthermore, there is an application of pressure There is no need for air to completely cut through the material web.

According to a preferred embodiment of the invention, the Cutting device with an at least approximately constant Ge speed at least substantially perpendicular to the direction of the Material web moves.

As a result, a cutting line can be generated in the material web at an angle to the running direction of the material web from an edge of the material path to the opposite edge. The generated by it The sloping edge of the new path start can also be used when the path is very high speeds comparatively easily on the new winding core be wound up. This creates a conically wound wrap catch.  

According to a further preferred embodiment of the invention, who the two cutters in opposite directions at least approximately perpendicular to the direction of travel of the material web with preferably at least approximately constant speed moves.

The two cutting devices can - with respect to the transverse direction tion - such on the material web in the area of its center or from the edges of which are set so that two intersecting, each diagonally to the running direction of the material web from about the middle to one the edges or reverse cut lines are created. To this The leading edge of the new path start can be cut to a point ten, which makes winding on the new winding core easier is tert.

The object underlying the invention is also by the Device for performing the method according to the invention solved, those with at least one to completely cut through the material track trained cutting device is provided.

Preferred embodiments of the invention are in the subclaims Chen, the description and the drawings.

The invention will now be described by way of example with reference to the Drawing described. Show it:  

Fig. 1 is a schematic side view of part of a machine for making paper Ma with a Wickelvorrich processing according to an embodiment of the invention,

Fig. 2 is a view corresponding to FIG. 1 with a Wickelvor direction according to another embodiment of the invention, and

Fig. 3 to 5 different embodiments of a Schneidvor direction for a winding device according to the inven tion.

Is used in the papermaking machine shown in FIG. 1 is used in an OF INVENTION to the invention winding apparatus, a paper web 10 through a winding roller 18 to a winding core which be referred to as old winding core is characterized fed on which in the state shown in Fig. 1 already a winding roll 16 has been formed. The paper web 10 runs through a gap 21 between the winding roller 16 and a pressure roller 32nd

The axes of rotation of the winding roller 18 and the old winding core lie in the same horizontal plane in which the winding carriage (not shown), which carries the old winding core, can be moved in a direction perpendicular to the axes of rotation.

Fig. 1 shows the winding device in a state in which the desired end diameter of the winding roller 16 reaches ge and the old wic kelkern has moved from a winding position adjacent to the winding roller 18 in Fig. 1 to the right.

A new winding core 12 , on which the paper web 10 is to be wound further, has been moved towards the winding roller 18 according to FIG. 1 into a position in which a line intersecting the axes of rotation of the new winding core 12 and the winding roller 18 perpendicularly at an angle α runs to the horizontal. The new winding core 12 and the winding roller 18 form a gap 20 for the paper web 10 .

A cutting device, which comprises two knives 24 , is positioned in the web running direction B in front of one of the winding rollers 18 upstream deflection roller 54 and thus in front of the winding roller 18 . The two knives 24 are each coupled to a transport device 36 with which the knives 24 can be moved perpendicular to the web running direction B. As indicated by the double arrow in Fig. 1, the cutting device is movable relative to the Pa pier web 10 , so that it can be moved back and forth between a waiting position and a separation position shown in FIG. 1 for cutting the paper web 10 . The cutting device can for example. be attached to a carrier which can be moved or pivoted by means of an actuating member between the waiting position and the disconnected position.

In order to wind the paper web 10 onto the new winding core 12 with the winding device according to the invention shown in FIG. 1, the state according to FIG. 1 is first produced. For this purpose, the new winding core 12 is brought between the winding roller 18 and the drive away from the winding roller 18 , the old winding core 14 carrying the winding roller 16 .

Simultaneously or subsequently, the cutting device is brought into the separation position according to FIG. 1, the knives 24 being in a position in which they are not yet in engagement with the paper web 10 .

Subsequently, the paper web 10 is cut by means of the cutting device and the resulting new web start is wound onto the new winding core 12 . Examples of the structure and the function of the cutting device are explained in more detail below with reference to FIGS . 3 to 5.

The embodiment of Fig. 2 differs from that of Fig. 1 in that the paper web 10 is deflected in the web running direction B in front of the winding roller 18 by a deflecting roller 56 , the axis of rotation below the horizontal plane by the axes of rotation of the winding roller 18 and of the old winding core carrying the winding roller 16 is arranged. The deflecting roller 56 is positioned such that the paper web 10 runs approximately in the vertical direction before it runs onto the winding roller 18 .

In the embodiment of FIG. 2, a cutting device is arranged in the web running direction B directly in front of the deflecting roller 56 , which has two nozzles 26 as cutting elements, via which a fluid jet, in particular a water jet, can be ejected under high pressure, which is capable of in each case is to cut the paper web 10 . The nozzles 26 are each aligned such that the water jets strike at least approximately perpendicularly on the plane defined by the paper web 10 . In principle, however, the beams can also be directed obliquely onto the paper web 10 .

The deflecting roller 56 and the cutting device can, for. B. can be arranged near the ground.

The cutting device provided with the nozzles 26 according to FIG. 2 can - like the cutting device according to FIG. 1 - be designed to be movable or pivotable between a waiting position and a separating position. However, this mobility of the cutting device is not absolutely necessary, since the cutting operation can be interrupted by interrupting the fluid or water supply to the nozzles 26 .

In the embodiments according to FIGS. 1 and Fig. 2, the paper 10 of a free running path can be ground with the cutting devices in each case in the area to be cut. Basically, it is also possible according to the invention to position the cutting devices in such a way that the paper web 10 is severed in an area in which the paper web 10 touches a roller 18 located upstream of the winding roller 18 , e.g. B. one of the Wal zen 53 , 54 and 55 or 56 , 57 and 58 .

FIGS. 3 to 5 each describe an embodiment of a cutting device according to the exporting illustrated in FIGS. 1 and 2 approximately examples of a machine for producing a paper web 10 for severing the paper web 10 can be placed. The cutting devices described below each comprise one or two knives. It is hereby expressly pointed out, however, that other cutting elements or cutting tools can be provided instead of the knives, for example, nozzles for ejecting a water jet under high pressure, laser devices or rotating toothed cutting wheels with otherwise the same structure.

In Fig. 3 a cutting device is illustrated, which has only a single blade 24 '. The transport device 36 for the knife 24 'comprises an endless organ 40 , for example a chain, belt or belt, to which the knife 24 ' is attached and which is perpendicular to the web running direction indicated by an arrow B, ie in the longitudinal direction of a roller 52 extends, the direction of rotation is indicated by an arrow C and in the vicinity of which the cutting device is arranged. In the roll 52 may be, for example, punching han about a deflecting roller which is arranged upstream of the winding roller shown in Fig. 1 and 2 18, z. B. around the deflecting roller 54 in Fig. 1 and the deflecting roller 56 in Fig. 2. It is also possible according to the invention, however, to provide the cutting device in a larger distance from the rollers.

The endless member 40 is tensioned by two deflection rollers 42 . One of the deflection rollers 42 is coupled to a drive device, not shown, in order to be able to rotate the endless member 40 and thus the knife 24 '.

After a state according to FIG. 1 and FIG. 2 is established and the desired diameter of the winding roll on the old winding core is sufficient, the endless member 40 is set in motion in the direction of arrow A to cut the paper web 10 , the knife 24 'being off its rest position is accelerated in such a way that it has reached the desired speed at the latest after revolving around the deflection roller 42 on the left in FIG. 3. The paper web 10 running at undiminished speed is then - starting at its left edge in FIG. 3 - completely severed by the knife 24 'running at a constant speed, which is preferably 10 to 40 m / s.

The superimposition of the movements of the paper web 10 and the knife ser 24 'results in a cutting line 46 running obliquely to the web running direction B, the angle which the cutting line 46 includes with the web running direction B depends on the ratio of the speeds of the knife 24 '. and the paper web 10 depends.

The at the leading edge 10 b of the new web start 10 a thus obliquely to the web running direction B cut paper web 10 2 formed winding arrangement is a shown in FIG. 1 and FIG. Fed, the new web start ie 10 a is fed over the roller 52 of a winding roller, by the gap formed by the winding roller and a new winding core (in FIG. 1 and FIG. 2 through the gap 20 ) is passed through and then optionally wound onto the new winding core with the aid of suitable means. The new start of web 10 a can be blown to the new winding core by means of compressed air, for example.

. Deviating from the embodiment according to Figure 3, the Schneidvor direction obliquely moved to the web running direction B, whereby - at an unchanged speed of the paper web 10 and the knife 24 '- the angle between the line of intersection 46 and the web running direction B smaller, ie, the paper web 10 is cut more pointedly.

The cutting device shown in Fig. 4 comprises two knives 24 ", which are each perpendicular to the direction indicated in Fig. 4 by the arrow B running direction in opposite directions are movable.

The transport device 36 "not shown in detail in FIG. 4 comprises an endless member, as has been explained in connection with FIG. 3 and to which the two knives 24 " are attached.

The two knives 24 "are arranged at a distance from one another in the direction of web travel B and are positioned approximately centrally in relation to their transverse direction for severing the paper web 10. In order to completely sever the paper web 10 , the two knives 24 " are accelerated in advance and as a function of them own speed and the speed of the paper web 10 are attached to the paper web 10 such that the two resulting cutting lines 46 intersect, as shown in FIG. 4.

This results in a tapering new web start 10 a, which, as described above in connection with FIG. 3, is fed to the new winding core and, if appropriate with the aid of suitable means, for example compressed air, is wound onto the new winding core.

The knives 24 "can also be moved in each case, starting from one of the edges of the paper web 10 perpendicular to the web running direction B in the direction of the center of the paper web 10, in such a way that the cutting lines intersect. Here, a V-like or dovetail cut new web start would occur surrender.

In the embodiment of a cutting device shown in FIG. 5, a knife 24 '''is provided, which is movable with a transport device 36 ''' comprising a cylinder-piston unit 28 . The knife 24 '''is coupled to a cylinder which he can move back and forth in a direction perpendicular to the web running direction B in a plane parallel to the paper web 10 .

Basically, according to the invention, any combination between the kon kreten embodiment of the cutting device as well as their way of example in Fig. 1 and Fig. 2 in the arrangement shown making machine in front of the winding roller 18 in the possible.

The transport devices for the cutting members can also each comprise a carriage positively guided on a linear guide, the accelerated at the start of the separation process and over the full Width of the paper web is shot to a certain extent.

An advantage of the invention is that the movement of the new winding core 12 towards the winding roller 18 does not have to be interrupted for severing the paper web 10 .

Reference list

10th

Material web, paper web

10th

a new path start

10th

b leading edge

12th

new winding core

16

Winding roll

18th

Winding roller

20th

,

21

gap

24th

,

24th

',

24th

",

24th

''' Knife

26

jet

28

Cylinder-piston unit

32

Pressure roller

36

,

36

',

36

",

36

'''Transport device

40

Endless organ

42

Pulley

46

Cutting line

52

roller

53-58

Deflection rollers
A Direction of rotation of the knife
B Direction of travel of the material web or paper web
C Direction of rotation

Claims (29)

1. A method for severing a running web of material ( 10 ), in particular a paper web, in which the web of material successively on several winding cores ( 12 , 14 ), in particular reel, wound and each with the winding on a new Wik core ( 12 ) is started when a winding roll ( 16 ) formed on a previous old winding core ( 14 ) has reached a predetermined diameter, wherein

• - The new winding core ( 12 ) between a winding roller ( 18 ), in particular a support roller, and the old winding core ( 14 ), to which the material web ( 10 ) is fed via the winding roller ( 18 ), and
• - The running material web ( 10 ) is cut in front of the winding roller ( 18 ),

characterized in that the material web ( 10 ) by means of at least one cutting device, which is moved rela tively to the material web ( 10 ) in an approximately parallel plane to the material web ( 10 ), is completely severed. 2. The method according to claim 1, characterized in that the cutting device is preferably moved at least substantially perpendicular to the running direction B of the material web ( 10 ) such that an oblique cutting line ( 46 ) is generated. 3. The method according to claim 1, characterized in that the cutting device is moved obliquely to the direction B of the Ma material web ( 10 ) preferably with one of the direction B of the material web ( 10 ) opposite parallel component is moved. 4. The method according to at least one of the preceding claims, characterized in that the cutting device is moved continuously over the entire width of the material web ( 10 ). 5. The method according to at least one of the preceding claims, characterized in that the cutting device is moved during the severing of the Ma material web ( 10 ) with a preferably at least approximately constant constant speed of preferably about 10 to 40 m / s. 6. The method according to at least one of the preceding claims, characterized in that the cutting device is accelerated before cutting the material web ( 10 ). 7. The method according to at least one of the preceding claims, characterized in that the cutting device at least one knife ( 24 , 24 ', 24 ", 24 '''), a rotating, preferably toothed cutting wheel, a laser or a nozzle ( 26 ) for Ejecting a jet of water. 8. The method according to at least one of the preceding claims, characterized in that at least two cutting devices in opposite directions at least approximately perpendicular to the direction B of the material web ( 10 ) are moved with preferably at least approximately constant speed. 9. The method according to claim 7, characterized in that the cutting devices for severing the material web ( 10 ) preferably at points in the running direction B of the material web ( 10 ) spaced points of the material web ( 10 ) are each at least approximately in the center with respect to the transverse direction. 10. The method according to the preamble of claim 1, characterized in that the material web ( 10 ) by means of at least two Schneidvorrich lines, which are preferably moved in an approximately parallel to the material web ( 10 ) plane relative to the material web ( 10 ) is severed. 11. The method according to claim 10, characterized, that each cutting device according to at least one of the claims che 2 to 9 is formed and / or is used. 12. The method according to at least one of the preceding claims, characterized in that the material web ( 10 ) is separated by in the region of a free path. 13. The method according to at least one of claims 1 to 11, characterized in that the material web ( 10 ) is severed in an area in which the material web ( 10 ) touches one of the winding roller ( 18 ) upstream roller ( 52 ). 14. The method according to at least one of the preceding claims, characterized in that during the severing of the material web ( 10 ), the axis of rotation of the new winding core ( 12 ) lies above a horizontal plane containing the axis of rotation of the old winding core ( 14 ). 15. The method according to at least one of claims 1 to 13, characterized in that during the severing of the material web ( 10 ), the axis of rotation of the new winding core ( 12 ) is substantially in a horizontal plane containing the axis of rotation of the old winding core ( 14 ). 16. The method according to at least one of the preceding claims, characterized in that after severing the material web ( 10 ) the new web beginning ( 10 a) on the new winding core ( 12 ) in particular by blowing, moistening, gluing and / or providing adhesive strips is applied. 17. The method according to at least one of the preceding claims, characterized in that the speed of the material web ( 10 ) when cutting the material web ( 10 ) is not reduced. 18. The method according to at least one of the preceding claims, characterized in that the new winding core ( 12 ) when inserted between the winding roller ( 18 ) and the old winding core ( 14 ) is immersed in the material web ( 10 ). 19. Apparatus for performing a method according to at least one of the preceding claims with at least one cutting device, characterized in that the cutting device for completely cutting through the material web (10) is movable in an approximately parallel to the material web (10) plane relative to the material web (10) . 20. The apparatus according to claim 19, characterized in that the cutting device over the entire width of the material web ( 10 ) is movable. 21. The apparatus according to claim 19 or 20, characterized in that a transport device ( 36 , 36 ''') of the cutting device comprises at least one cylinder-piston unit ( 28 ) whose piston carries the cutting device at one end. 22. The apparatus according to claims 19 or 20, characterized in that a transport device ( 36 ', 36 ") of the cutting device comprises a deflecting rollers ( 42 ), preferably chain-like or belt-like endless member ( 40 ), on its outside the Schneidvor direction wearing. 23. The device according to at least one of claims 19 to 21, characterized in that the winding cores ( 12 , 14 ) are provided with an elastically deformable, in particular made of a wear-resistant plastic, preferably made of polyurethane, cover. 24. The device according to at least one of claims 19 to 21, characterized in that a cover of the winding cores ( 12 , 14 ) each made of metal and the reference of the winding roller ( 18 ) elastically deformable, in particular made of a wear-resistant plastic, preferably made of polyurethane is. 25. The device according to at least one of claims 17 to 24, characterized in that the cutting device comprises a nozzle ( 26 ) for ejecting a water jet. 26. The device according to at least one of claims 17 to 25, characterized in that at least two cutting devices, preferably spaced apart in the running direction B of the material web ( 10 ), are provided which are movable in opposite directions at least approximately perpendicular to the running direction B of the material web ( 10 ) . 27. The device according to the preamble of claim 19, characterized in that at least two cutting devices are provided which are preferably movable in a plane approximately parallel to the material web ( 10 ) relative to the material web ( 10 ). 28. The device according to claim 27, characterized, that each cutting device according to at least one of the claims che 20 to 26 is formed.   29. Cutting device for severing a running material web ( 10 ) for a device according to at least one of claims 19 to 28.