EP1516841B1 - Device and process for removing scrap of web material from a drum - Google Patents

Abstract

The device (1) which is especially a reel-spool storage station, has a winding reel (3) driven by a drive unit (7) and has a cutting device (11) for removal of the roll of material web (6). The winding reel produces a rotational movement for the rolling off of the roll, and the winding reel and the cutting device are movable in relation to one another in a traversing direction. The cutting device has a first cutter (12) and a slide element connected to a second cutter. An independent claim is included for a method for the removal of a roll of material web from a winding reel especially in a reel-spool storage station in which a cutting device is set against the generated surface at an acute angle to the longitudinal axis of the winding reel and the roll is cut through by the cutting device in ring form.

Description

The invention relates to a device, in particular a Tambourablagestation, with a winding drum comprising a wound with a winding of a web winding core, and at least one cutting element having a cutting device for removing the roll of the material web.

In the production of a material web, in particular a paper, board, tissue or another fibrous web, an endless web is usually produced and rolled up on winding reels until a desired diameter is reached. The wound-up material web is transported further for subsequent treatment in a processing machine, for example in a slitter-winder, a rerolling machine, a calender or a coater, and unwound again in a corresponding unwinding device. Both during winding and unwinding of these winding reels accumulate certain amounts of waste material, whose treatment and return to the production process often leads to major impediments to the production process.

Rolling devices are known with a brake in which the Committee is broadly web in a pulper (dissolver) is passed. The unrolling of broke in a special unwinding device of the processing machine is also known. Likewise, the skinning of scrap layers or ply packages by hand in a roll-off device of a processing machine belongs to the state of the art. Also in Volltambourablagestationen is intervened manually to wait for layer packages.

Out of the three US Pat. Nos. 5,759,350 A . US Pat. No. 6,761,098 B1 and US 4,864,904 A is in each case a device, in particular a Tambourablagestation, with a winding drum, which comprises a wound with a winding of a material web winding core, and at least one cutting element having a cutting device for removing the roll of the material web known. In all three publications, the respective winding drum is rigidly mounted at least during cutting and the respective cutting device is movable along the winding drum. The cutting device is arranged in the first-mentioned document on a carriage and by means of which also along the winding drum movable. On the other hand, it is arranged in the latter two publications on a respectively mounted in a frame structure movement means and by means of which in turn movable along the winding drum.

In the U.S. Patent 4,906,334 A there is described a reel stand from which a paper web, which is considered to be broke, is returned to a pulper for the pulp web conditioning process.

The disadvantages of the prior art are that all said methods require a permanent staff deployment for implementation and monitoring. The scrap treatment within the transport system between a machine roller and the processing machine can lead to disturbances and delays in the material flow for the production of the finished finished material web.

The manual reject treatment is often associated with special risks for the personnel performing and makes, for example, the stay at the discharge chute required. The staff can also be endangered by falling ropes. Likewise, only the train, which carries the web, a danger to the staff who must stay near the web.

It is the object of the invention to provide a device which overcomes the disadvantages of the prior art and provides an easy way to eliminate scrap of a web.

According to the invention, this object is achieved in that the winding drum is drivable by a drive device and that the winding drum carries out a rotational movement for unrolling the winding such that the winding drum at least one cutting device in the traverse direction are movable relative to each other. In particular, several cutting devices can also be directed onto the winding in order to cut it into narrow, easily removable strips. In addition, when the cutters are still being moved with each other and, for example, traversing at different speeds with respect to the reel on the reel drum, during reeling of the reel produced by the winding drum pieces from the web. The width of the strip packs can be varied via the rotational frequency of the winding drum and / or via the traversing speed. Either traverses only the winding drum or only the at least one cutting device, or both the winding drum and the at least one cutting device to move in the direction of the longitudinal axis of the winding drum. According to the invention, manual intervention is no longer required. The device is fed either by a spool transport system or by a drum crane.

An inventive device, in particular a Tambourablagestation, comprises a rotating device for driving the winding drum, for example, a geared motor with an acting on the outer surface of the wound on the winding cylinder winding friction wheel. Alternatively, the winding drum has a core drive, for example, with a slidable toothed coupling introduced in the drive shaft or the like. The device is either fed by a spool transport system or by a tambour crane. It can also include a winding machine.

Advantageous developments emerge from the subclaims, the description and the drawings.

Advantageous is a device in which the cutting device comprises a knife and a sliding element. The cutting device comprises a first knife or cutting element with high cutting force, for example a rotating circular knife, which is used as needed in combination with a second cutting element, which protects the surface of the winding core, that is not scratched or material removes. This is achieved by the combination of a knife blade, which is embedded in a sliding element or on its side facing the winding core has a sliding layer, which consists of a material which is softer than the surface of the winding core. The layers of the winding of the material web are thus initially removed from the outside by the first cutting element, in particular the rotating circular blade, until there is only a residual winding with a fixed diameter on the winding core. The specified diameter is detected, for example, by a sensor or is detected due to a stop on the cutting device. After reaching the diameter of the circular blade is turned off, and the other layers of the roll are gently removed by the second cutting element, so that damage to the winding core can be avoided. The layers are first lifted by the sliding element of the winding tube or the winding core and then cut through the knife blade. The sliding element or the sliding layer consists for example of plastic.

It is advantageously provided that the cutting element is in each case a laser beam, which is in particular for fire prevention under a protective gas atmosphere, or by a standing under high pressure and radiated on the material web fluid, in particular water or air is formed.

A suction device is advantageously attached to the device in order to suck off strips or pieces formed by the cutting element or the cutting elements from the material web. In particular, a suction device also shields the cutting area on the winding drum against the strips or pieces detached from the winding. These are either already transported by the suction device or in connection with the suction device via a discharge chute or a conveyor belt to a crushing device for further comminution or directly to a pulper in which they serve to produce a pulp suspension.

Also particularly suitable is the use of a cleaning device, as shown in the DE 195 07 938 A1 is known in the cutting area. In this device, at least one nozzle is provided in connection with a suction chamber, which is associated with the nozzle such that a detached at the cutting point by the nozzle jet strip is sucked in and removed from the nozzle together with the water. Preferably, the water acted upon by the material from the material web is transported directly to the dissolver In order not to damage tambourines with cut-sensitive coverings, means for determining the residual layer thickness of the roll of the material web on the winding drum can be provided in order to end the cutting process when the residual layer thickness is reached. The measuring systems include, for example, sensors based on ultrasound, laser sensors or optical or mechanical sensors.

Likewise, means for influencing the depth of cut on the winding of the material web on the winding drum may be present on the cutting device. Alternatively, the material web is not cut on the winding, but in free fall below the winding drum to safely exclude damage to the surface of the winding core.

The cutting device can either be arranged separately on the winding drum, or it is integrated in a magazine for full, scrap or residual reel. Alternatively, it is integrated into an overall transport system for wound or empty reels.

The rotational movement of the wrapping drum during Abschwartvorgang preferably takes place counter to the winding direction in order to avoid uncontrolled unwinding of the outer layer.

The invention also relates to a method for removing the roll of the material web from the winding drum in a device, in particular a Tambourablagestation, the type described above.

It is also the object of the invention to provide an effective method by which the winding of the material web can be broken up into small pieces.

According to the invention, this object is achieved in that the cutting device is employed at an acute angle or at a 90 ° angle with respect to the longitudinal axis of the winding drum to the lateral surface and that the Winding drum rotates while the winding drum and the cutter are moved relative to each other in the direction of the longitudinal axis of the winding drum. By simultaneous rotation of the winding cylinder and a traversing the winding is separated into spiral narrow, easily treatable strip packages. The traversing movement is realized simultaneously with the cutting. It must be synchronized with the rotational speed of the winding drum, depending on the angular position. The traversing movement is achieved either by the cutting device or by the winding drum or by a movement of both the cutting device and the winding drum in the longitudinal direction.

If only the winding drum is traversed and the cutting device is arranged stationary during cutting, that is moved only radially to the spool axis, as well as a traversing movement of the cutting device, the layer package of the web is separated into spiral, narrow, easier to handle strip packages, but fall the stripe packages not over the entire width of the winding drum on, but only at the same narrow point at which the cutter is positioned. This has the advantage that an opening for the removal of the strip packs can be made correspondingly smaller than in the other embodiment.

If the wrapping drum has a large diameter and thus has a larger remaining rind, the traversing with the rotating cutting blade is repeated until there is only one remaining rind with a small thickness, for example in the range of five to one hundred millimeters, on the winding core.

The remaining rind up to the tambour core is then either removed with the rotating circular knife in combination with the surface-sparing knife or exclusively with the surface-sparing knife, which consists of a particular existing plastic sliding layer and a knife blade. The sliding layer slides to remove the last remaining rind on the Tambouroberfläche, without damaging them, lifts the bottom material web position and leads them to the knife blade.

In a first embodiment of the method for removing the roll of the material web from the winding drum it is provided that for removing the roll of the material web from the winding drum in the Tambourablagestation the cutting device at an acute angle or at a 90 ° angle with respect to the longitudinal axis of the winding drum the lateral surface is employed, that the winding is cut annularly by the cutting device, wherein after carrying out an annular section of the winding drum and the cutting device are moved relative to each other in the direction of the longitudinal axis of the winding drum, that after performing all annular cuts of the winding drum and the cutting device relative are pivoted to each other by 90 ° in the horizontal plane and that subsequently the winding is cut in the direction of the longitudinal axis. Due to the simultaneous rotational movement of the winding cylinder and the feed movement of the cutting device, the layer package is separated annularly. During this cutting process, the cutter and the winding drum do not traverse each other. This process is repeated over the entire width of the winding drum. Subsequently, the cutting device is pivoted axially to the winding drum, and it will be the rings that were generated in the first cutting process, separated. Here, the winding tambour does not rotate. Narrow, easily treatable strip packs are also produced in this process.

For reels with a larger remaining rind this process is repeated with the rotating disc knife, until there is only one remaining rind of small thickness on the reel drum. This remaining rind is removed axially to the winding core either with the rotating disk knife in combination with the surface-sparing knife or exclusively with the surface-sparing knife.

The removal of the strip packages is done for example via a discharge shaft, a conveyor belt or by suction directly into the dissolver or by means of a shredding device to prepare the strip packages for further transport in pipelines.

In a further embodiment of the method for removing the roll of the material web from the winding drum is provided that the winding drum rotates stationary and that the cutting device is traversing once or more traversing along the lateral surface of the roll of the material along a certain number of winding layers of Wickels is removed from the winding tambour. A strip packet cut off from the winding is led into a web-wide discharge chute or is discharged via a flexible channel entrained with the cutting device, in particular with a suction device.

And in a third embodiment of the method for removing the roll of the material web from the winding drum, it is provided that the winding drum rotates and additionally traverses the stationary cutting device once or several times in order to pass the lateral surface of the winding of the material web past the cutting device until a fixed position Number of winding layers of the winding is removed from the winding drum.

A cut strip package is fed into a discharge chute whose cross-section is to be dimensioned only in accordance with the dimensions of the expected strip packages. For example, a shaft with a round cross section is suitable. The width of the strip packs can be adjusted by the slope of the cutting line and adapted to the pulp's dissolving capacity or the existing shaft width.

Overall, the advantages of the invention are that time is gained at critical points in the final group cycle of a machine for producing a material web, for example at the unrolling position for the slitter-winder. The operating staff is relieved. The safety in automated Volltambourstrecken will be raised. Safety measures are simplified, since a closed barrier of the danger area is possible, which leads to cost advantages by the saving of security measures. It can be disposed of both core and outside committee.

The invention will be explained in more detail in exemplary embodiments.

Show it

FIG. 1

a perspective view of a winding drum in conjunction with a cutting device;

FIG. 2

the cutting device of Figure 1 in detail.

FIG. 3

the winding drum and the cutting device in a traversing arrangement to each other in a side view;

FIG. 4

the arrangement of Figure 3 in plan view with a sinusoidal section line ..;

FIG. 5

the winding drum and the cutting device in a cutting operation in which the winding drum does not traverse during cutting in the radial direction;

FIG. 6

a perspective view of a traversing winding drum in conjunction with a stationary cutter; and

FIG. 7

a perspective view of a stationary winding drum in conjunction with a traversing cutter.

A device 1 in an embodiment of a drum storage station (FIG. 1) comprises a winding drum 3 arranged on a storage rack 2 with a winding core 4 and the winding 5 of a material web 6 applied to the winding core 4, for example a paper, board, tissue or another fibrous web. The winding drum 3 either has a core drive or is driven via a laterally mounted motor 7 via gears 8, 9 or via a belt drive 10 (FIG. 3). To the winding drum 3, a cutting device 11 is employed in the direction of a double arrow A pivotable. The cutting device 11 (Figures 1 and 2) comprises a rotating blade 12 and a knife blade 13 and a sliding member 14 in the form of a strip 15 made of plastic. With the help of the rotary or drive device 7, 10, the web layers are unwound individually from the winding drum 3.

In one arrangement, the cutting device 11 (Figure 3) at an acute angle or an angle of 90 ° with respect to the longitudinal axis L (arrow) of the winding drum 3 is made to the winding 5, while the winding drum 3 rotates. In addition, since the winding drum 3 and the cutting device 11 traverse each other, that is, moved parallel to the longitudinal axis L (arrow) of the winding drum 3 to each other, formed during the projection of the cutting line in the plane of a sine curve 16 (Figure 4), as a plan view of the Winding drum 3 shows. In this case, the cutting device 11 is employed at an acute angle α with respect to the longitudinal axis L (arrow) of the winding drum 3 at this.

In a further alternative, the cutting device (FIG. 5) is set against the winding drum 3 at a right angle with respect to the longitudinal axis L (arrow). The winding drum 3 rotates, and the cutting blade 11 cuts in a position 11.1 rings 17 in the winding after the winding drum 3 and the cutter 11 have been displaced in each case after cutting a ring 17 by a distance from each other in the longitudinal direction. The movement in the longitudinal direction is performed exclusively by the winding drum 3 exclusively, by the cutting device 11 exclusively or by both together.

After the entire winding is cut through in rings 17, the entire cutting device 11 or only the cutting blade 12 is rotated by 90 ° and placed in a position 11.2, in which it cuts through the winding in the longitudinal direction, either the cutter 11 on the winding drum 3 along moves or the winding drum 3 is moved in the longitudinal direction. It can be several longitudinal cuts 18 perform when the winding drum 3 rotates after each longitudinal section by a small angle. However, during cutting, the winding drum 3 does not rotate.

FIG. 6 shows a perspective view of a traversing winding drum 3 in conjunction with another stationary device 1 in the form of a drum storage station.

About a set up on the long side of the winding drum 3 cutting device 11 is from a supply line 19 and a nozzle 20 under high pressure water against the wound on the winding roll 3 web 6 blasted to cut them. From the cutting element 11 cut strips 21 fall into a flexible discharge channel or on a conveyor belt 22, which transports them to a resolver.

As the winding drum 3 rotates, the cutting device 11 travels on rails 23 and has a drive motor 7. Depending on the desired strip thickness, the rotational speed of the winding drum 3 and the traversing speed of the cutting device 11 are coordinated.

In a further embodiment (FIG. 7), a winding drum 3 with its shaft journals 24 and bearing walls 25 is mounted on a carriage 26 in a device 1 in the form of a drum carrier station. The carriage 26 is movably mounted on rails 27 in the direction of the longitudinal axis L (arrow) of the winding drum 3. This carries out rotational and traversing movements, while a stationary cutting device 11 with the cutting device 11 cuts the material web 6 into strips 21. The strips 21 are then removed again via the conveyor belt 22 or a channel.

Also in this case, the rotation and traverse speeds are synchronized with each other to form strips 21 of the desired width, which can be picked up therefrom according to the processing capacity of the resolver. Advantageously, it is also possible to arrange a plurality of nozzles 20 side by side, which produce a multiplicity of strips 21 at the same time.

LIST OF REFERENCE NUMBERS

1

Furnishing (drum storage station)

2

storage rack

3

winding drum

4

winding core

5

reel

6

web

7

engine

8, 9

gear

10

belt drive

11

cutter

11.1

position

11.2

position

12

knife

13

knife blade

14

Slide

15

strip

16

sine curve

17

ring

18

longitudinal section

19

supply

20

jet

21

strip

22

conveyor belt

23

rail

24

shaft journal

25

bearing wall

26

carriage

27

rail

A

double arrow

L

longitudinal axis

α

angle

Claims (8)

1. Device (1), in particular a spool storage station, having a reel spool (3) which comprises a core (4) wound with a coil of a material web (6), and having at least one cutting device (11) having a cutting element for removing the coil of the material web (6),
   characterized
   in that the reel spool (3) can be driven by a drive device (7, 10) and
   in that the reel spool (3) completes a rotational movement in order to unwind the coil in such a way that the reel spool (3) and the at least one cutting device (11) can be moved relative to one other in the traversing direction.
2. Device (1) according to Claim 1, characterized in that the cutting device (11) comprises a first knife (12) and a sliding element (14) in particular connected to a second knife.
3. Device (1) according to Claim 2, characterized in that the first knife (12) is a circular knife.
4. Device (1) according to Claim 3, characterized in that the sliding element (14) consists of a softer material than the core (4), in particular of plastic.
5. Device (1) according to Claim 1, characterized in that the cutting element is in each case a laser beam, which is in particular under an inert gas atmosphere, or is formed by a fluid that is under high pressure and is blasted onto the material web (6).
6. Device (1) according to one of the preceding claims, characterized in that strips (21) or pieces formed from the material web (6) by the cutting element can be transported by a suction device, which in particular also shields the cutting region on the reel spool (3), and/or via an ejection shaft or a conveyor belt (22), to a comminution device or pulper.
7. Device (1) according to one of the preceding claims, characterized in that there are means for determining the residual layer thickness of the coil (5) of the material web (6) on the reel spool (3), in order to end the cutting operation when the residual layer thickness is reached.
8. Method for removing the coil (5) of the material web (6) from the reel spool (3) in a device (1), in particular a spool storage station, according to one of Claims 1 to 7,
   characterized in that
   the cutting device (11) is set against the circumferential surface at an acute angle (α) or at a 90° angle with respect to the longitudinal axis (L) of the reel spool (3), and in that the reel spool (3) rotates while the reel spool (3) and the cutting device (11) are moved relative to one another in the direction of the longitudinal axis (L) of the reel spool (3).

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