CN114846203B - Device and method for transferring fibrous webs - Google Patents
Device and method for transferring fibrous websInfo
- Publication number
- CN114846203B CN114846203B CN202080087541.6A CN202080087541A CN114846203B CN 114846203 B CN114846203 B CN 114846203B CN 202080087541 A CN202080087541 A CN 202080087541A CN 114846203 B CN114846203 B CN 114846203B
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- CN
- China
- Prior art keywords
- web
- stabilizing element
- roller
- fibrous web
- transfer bar
- Prior art date
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Classifications
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G9/00—Other accessories for paper-making machines
- D21G9/0063—Devices for threading a web tail through a paper-making machine
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- Paper (AREA)
- Preliminary Treatment Of Fibers (AREA)
Abstract
本发明涉及一种在制造和/或精制纸幅、纸板幅、纸巾幅或其他纤维料幅(9)的机器中将纸幅、纸板幅、纸巾幅或其他纤维料幅转移到目标区域(1)中的装置。具有分离装置(2)以将纤维料幅(9)分离成转移条(3)和剩余料幅(20)。转移条(3)和剩余料幅(20)通过旋转的辊子(4)导引。分离装置(2)设计为能横向于料幅行进方向(7)移动以加宽转移条(3)。根据本发明的装置特征在于，在旋转的辊子(4)和后续机器元件(5)之间，在转移条(3)加宽之前或期间，稳定元件(6)能在剩余料幅(20)的区域中定位，其中，所述稳定元件(6)至少部分地覆盖剩余料幅(20)并且剩余料幅(20)在旋转的辊子(4)和稳定元件(6)之间向下导出。本发明还涉及一种用于转移纤维料幅的方法。
The invention relates to a device for transferring a paper, cardboard, tissue or other fibrous web into a target area (1) in a machine for producing and/or refining paper, cardboard, tissue or other fibrous webs (9). The device comprises a separating device (2) for separating the fibrous web (9) into a transfer strip (3) and a residual web (20). The transfer strip (3) and the residual web (20) are guided by rotating rollers (4). The separating device (2) is designed to be movable transversely to the direction of web travel (7) in order to widen the transfer strip (3). The device according to the invention is characterized in that a stabilizing element (6) can be positioned in the area of the residual web (20) between the rotating rollers (4) and a subsequent machine element (5) before or during the widening of the transfer strip (3), wherein the stabilizing element (6) at least partially covers the residual web (20) and the residual web (20) is guided downwards between the rotating rollers (4) and the stabilizing element (6). The invention also relates to a method for transferring a fibrous web.
Description
Technical Field
The invention relates to a device for transferring a paper, board, tissue or other fibrous web into a target area in a machine for producing and/or refining the web, board, tissue or other fibrous web, having a separating device for separating the fibrous web into a transfer bar and a residual web at a first edge of the fibrous web, wherein the transfer bar and the residual web are brought into contact with and partially wrap around a rotating roller by their sides opposite to the top side of the fibrous web in front of the target area and are guided downwards from the machine, and wherein a transfer device is provided for transferring the transfer bar to a subsequent machine element of the target area, and wherein the separating device is designed to be movable transversely to the web travel direction for widening the transfer bar.
The invention also relates to a method of transferring a paper, board, tissue or other fibrous web in a machine for manufacturing and/or refining a paper, board, tissue or other fibrous web.
Background
For example, in papermaking, such devices are used to feed a new web head into a target roll, for example a web guide roll designed as a dryer cylinder or turning the web, or the web should be wound onto the target roll, when the paper machine is in run-on or after the web breaks. This transfer is carried out section by section in a paper machine. The cut narrow transfer bar is transferred to a subsequent paper machine section. The remaining web is led from the machine downwards into the beater, dissolved and recovered. As the transfer bar widens due to the movement of the separating element transversely to the web travel direction, the remaining web narrows and becomes more unstable in its travel. This can lead to waving of the remaining web, whereby the remaining web enters the target area uncontrolled, whereby breakage can occur. In addition, paper shreds can also deposit in the machine.
Devices for solving this problem are known. Document EP 1903142B 1 describes a system for the widening travel of a fibrous web. Stabilization devices acting on the underside of a fibrous web are disclosed herein. The stabilizing device is, for example, subjected to a negative pressure or to a negative pressure in order to stabilize the remaining web.
On the one hand, the known device is complicated to install and to operate. Energy is required to create a vacuum to stabilize the fibrous web. On the other hand, the negative pressure causes friction between the fibrous web and the stationary stabilizing device. This can lead to dust accumulation.
Disclosure of Invention
The object of the present invention is therefore to simplify and improve the stabilization of a fibrous web during transfer.
The technical problem is solved by a device for transferring a fibrous web into a target area in a machine for manufacturing and/or refining the fibrous web. A device for transferring a paper, board, tissue or other fibrous web into a target area in a machine for producing and/or refining the web, board, tissue or other fibrous web is proposed, which has a separating device for separating the fibrous web into a transfer bar and a residual web at a first edge of the fibrous web, wherein the transfer bar and the residual web are brought into contact with and partially wrap around a rotating roller by their sides opposite to the top side of the fibrous web in front of the target area and are guided downwards from the machine, and wherein a transfer device is provided for transferring the transfer bar to a subsequent machine element of the target area, and wherein the separating device is designed to be movable transversely to the web travel direction for widening the transfer bar.
According to the invention, it is proposed that between the rotating roller and the following machine element, before or during the widening of the transfer strand, a stabilizing element can be positioned opposite the top side in the region of the remaining web for stabilizing the transfer strand, wherein the stabilizing element at least partially covers the remaining web and the remaining web is guided down between the rotating roller and the stabilizing element.
The rotating roller may preferably be designed as a drying cylinder.
By arranging the stabilizing element opposite the top side of the fiber web, i.e. in the space between the fiber web and the target area, the stabilizing element can be designed to be passive, i.e. without the use of a vacuum. Furthermore, the stabilizing element is designed such that it can be positioned in the paper machine. This provides the possibility that it is positioned in the paper machine only for the transfer process and is again removed from the paper machine for the production run or brought into a parking position inside or outside the paper machine. In this case, no disturbing air flow or no disturbance of the desired air flow occurs via the stabilizing element. This applies in particular to the case where the device is provided for a dryer section.
The fibrous web is separated into a transfer bar and a remaining web by a separating element. At the beginning of the separation process, the transfer bar is narrower than the remaining web and is arranged at the first edge of the fibrous web. In an advantageous practical case, the first edge of the fibrous web corresponds to the operator side of the device. After the transfer of the transfer strip into the target area by means of a transfer device known per se, such as a wiper, the separating device is moved in the direction of the drive side of the device. The remaining web thereby becomes narrower and the web travel thereby becomes less stable. The stabilizing element now prevents, in a simple manner, a movement of the remaining web in the direction of the target area, for example in the direction of a subsequent roller or a subsequent clothing, preferably in the region of the drive-side edge of the remaining web.
Both sides of the paper machine are commonly referred to as the operator side and the drive side. The operator side is here the operating side for the paper machine operator. Transfer bars are formed at the operator-side edges of the fibrous web in order to be able to control and influence the transfer process. The drive and the auxiliary units of the paper machine are arranged on the drive side and are therefore only available to the operator with limited access.
In an advantageous embodiment, the distance between the stabilizing element and the rotating roller and/or the top side of the running residual web is less than 150mm during the stabilization of the transfer bar. This contributes to the stabilizing effect of the particularly narrow residual web and avoids breakage.
In a practical embodiment, the stabilizing element is designed to be rotatable parallel to the axis of the rotating roller. This assists in guiding the remaining web from the paper machine down into the beater.
In a practical case, the direction of rotation of the stabilizing element is opposite to the direction of rotation of the rotating roller.
Preferably, the stabilizing element has a rotary drive. Preferably, the rotational speed is adjustable. This also assists in guiding the remaining web from the paper machine down into the beater.
Furthermore, the stabilizing element may be arranged at the edge of the fibrous web opposite the first edge and is preferably dimensioned such that the maximum coverage of the remaining web transversely to the direction of travel of the web is 20mm to 800mm, in particular 20mm to 500mm, preferably 150mm to 250mm. Preferably, the first edge corresponds to the operator side edge of the fibrous web, so that in this case the edge opposite the first edge corresponds to the drive side edge of the fibrous web. In the edge region of the drive side, the initially wide remaining web is only partially covered by the stabilizing element, which reduces structural effort on the one hand and makes handling of the stabilizing element easier on the other hand. The remaining web is completely covered only when the width of the remaining web reaches the width of the stabilizing element during the widening travel of the transfer bar.
Depending on the parameters of the remaining web, it may be sufficient that the stabilizing element only partially covers the remaining web during stabilization of the transfer bar before the transfer bar widens.
However, if the stabilizing element completely covers the remaining web during the stabilizing of the transfer bar before the transfer bar widens, a full forced guidance of the remaining web results.
An advantageous development provides that the stabilizing element presses the remaining web against the rotating roller with an adjustable force during the stabilization of the transfer bar. This is advantageous in particular when the remaining web is narrow for stabilizing effect and breakage is avoided.
In a possible embodiment, the stabilizing element is supported on the support in such a way that its position can be changed transversely to the web travel direction and/or in the web travel direction, preferably vertically. This is advantageous for covering as full a web width, web position and cutting position as possible of the remaining web.
The positioning of the stabilization element can be effected manually or automatically for this purpose.
In a practical case, the fiber web is guided partially around the rotating rolls, wherein the fiber web is arranged between the drying wire and the rotating rolls. The drying wire presses the fibrous web against the surface of the rotating roll. The drying wire is then guided off the rotating roll, whereby a displacement wire is formed. During the manufacturing run, the fibrous web continues with the drying wire. The fibrous web is separated from the drying wire as the fibrous web is transferred. The running of the fibrous web on the rotating roll continues until the doctor blade breaks away the fibrous web so that it can pass down into the beater. The process of transferring the fibrous web into the target area is then started.
Advantageously, the stabilizing element is positioned immediately before the following doctor blade in the direction of rotation of the rotating roll and preferably after the displacement line.
A stabilizing zone is formed between the displacement line and the stabilizing element, in which stabilizing zone the travel of the remaining web is stabilized.
The position of the stabilizing element may be indicated by a vertical distance from an imaginary horizontal plane extending through the center of the rotating roller. The stabilizing element is arranged below the water level. This applies to the stabilizing elements contacting the remaining web, as well as to the stabilizing elements arranged spaced apart from the remaining web. The distance from the horizontal plane to the upper edge of the stabilizing element is preferably measured.
The rotating roller has a roller radius. The vertical distance may be in the range of less than or equal to 0.9 roller radius, preferably in the range of less than or equal to 0.83 roller radius, especially in the range of less than or equal to 0.6 roller radius. In this way the size of the stabilization zone can be optimized.
Advantageously, the vertical distance may be in the range of greater than or equal to 0.4 roller radius, preferably in the range of greater than or equal to 0.45 roller radius, in particular in the range of greater than or equal to 0.5 roller radius. The size of the stabilization zone can also be optimized in this way.
The stabilizing elements can be designed as rollers, guide rollers. This enables a very simple and low cost solution.
In order to protect the remaining web, the guide roller as a stabilizing element may have an elastic roller sleeve.
The guide rollers used as stabilizing elements may have a diameter of between 30mm and 500mm, preferably between 30mm and 300mm, in particular between 30mm and 200 mm.
Advantageously, the guide roller used as the stabilizing element comprises a material selected from the group consisting of aluminum, V2A steel, V4A steel, cast iron, plastic, titanium, brass, bronze.
In a possible development, the guide roller used as the stabilizing element comprises a coating or roller sleeve made of the group of rubber, polyurethane, teflon, carbon fiber-reinforced plastic.
The roller sleeve can also be designed as a monofilament mesh fabric.
The guide roller serving as a stabilizing element can be multiply supported.
The stabilizing element may alternatively also be designed as a blowing device. Whereby the fluid is blown onto the remaining web in the coverage area for stabilization.
In special cases, a simple design of the stabilizing element may also be sufficient in terms of the properties of the remaining web. Thus, it may be sufficient to use sheets, brushes, paddles, air cushions.
It is also possible to use a blow tube arranged transversely to the direction of travel of the remaining web, which blow tube blows at least one fluid beam, for example an air beam, onto the remaining web and thereby stabilizes the travel of the remaining web.
In a possible further development, a blowing tube is used which is arranged transversely to the direction of travel of the residual web and blows at least one fluid, for example an air beam, onto the residual web and cooperates with a guide surface extending in the direction of travel of the residual web in stabilizing the travel of the residual web.
It is furthermore possible for the stabilizing element to be designed as a belt guided around two or three or more rollers.
The technical problem is also solved by a method of transferring a paper, board, tissue or other fibrous web into a target area in a machine for manufacturing and/or refining the paper, board, tissue or other fibrous web. A separating device is provided for separating the fibrous web into a transfer bar and a residual web at a first edge of the fibrous web, wherein the transfer bar and the residual web are brought into contact with and partially wrap around a rotating roller by their side opposite to the top side of the fibrous web in front of the target area and are guided downwards from the machine by the roller, and wherein the transfer bar is transferred by the transferring device to a subsequent machine element of the target area, and wherein the separating device is designed to be movable transversely to the web travel direction for widening the transfer bar. According to the invention, it is proposed that between the rotating roller and the following machine element, before or during the widening of the transfer strand, a stabilizing element is positioned opposite the top side in the region of the remaining web for the purpose of stabilizing the transfer strand, wherein the stabilizing element at least partially covers the remaining web and the remaining web is guided down between the rotating roller and the stabilizing element.
The stabilizing element is preferably designed as a roller and is arranged at the edge of the fibrous web opposite the first edge.
The stabilizing elements are preferably dimensioned such that the coverage of the remaining web transversely to the web travel direction amounts to 20mm to 800mm, in particular 20mm to 500mm, preferably 150mm to 250mm.
The invention also relates to the use of the aforementioned device for transferring a fibrous web in a machine for manufacturing and/or refining a fibrous web into a target area. According to the invention, the target area is the first or second drying drum of the first dryer group of the dryer section or the pre-dryer section or the post-dryer section.
The invention also relates to the use of the aforementioned device for transferring a fibrous web in a machine for manufacturing and/or refining a fibrous web into a target area. According to the invention, the target area is a size press (LEIMPRESSE).
Drawings
Further features and advantages of the invention emerge from the following description of a preferred embodiment with reference to the accompanying drawings.
In the accompanying drawings
Fig. 1 shows a schematic side view of the transition between the press section and the dryer section together with the apparatus according to the invention;
fig. 2 shows a simplified view of a rotating roller looking at the manufacturing direction from the top;
figure 3a shows a part of figure 1 together with an alternative stabilizing element,
Fig. 3b shows a part of fig. 1 together with a further alternative stabilization element.
Detailed Description
According to fig. 1, the fibrous web 9 is transferred during normal operation from the forming wire 10 of the former for forming sheets to a water-absorbing dewatering belt 11 running continuously around over the fibrous web 9 for dewatering the fibrous web 9 in a subsequent press section. The press section as shown here comprises one or generally several press nips through which the fibrous web 9 is led together with at least one dewatering belt 11, 12, respectively.
In fig. 1, the fibrous web 9 travels together with an upper dewatering belt 11 and a lower dewatering belt 12 through the only press nip formed by the two press rolls 13, 14. After this press nip, the upper dewatering belt 11 is guided away from the fibrous web 9 and the fibrous web 9 is transferred from the lower dewatering belt 12 to a gas-permeable, continuously running drying wire 15 of a subsequent dryer group for drying the fibrous web 9. The handover of the fibre web 9 is supported here by the guide roll 20, which guide roll 20 is covered by the drying wire 15 and sucked during the handover.
In the dryer group, the fibrous web 9 is alternately guided by a drying wire 15 onto a heated drying cylinder 16 and a suction guide roller 17, wherein the drying wire 15 presses the fibrous web 9 onto the hot outer circumferential surface of the drying cylinder 16. The drying cylinders 16 are all arranged below the fibre web 9, while the guide rollers 17 are located above the fibre web 9. The fibrous web 9 can thus be easily guided to the machine stack in the event of a break or in the event of a transfer and collected there in the beater 18. For this purpose, the first dryer cylinder 16 is provided with a doctor blade 8, which doctor blade 8 removes the fibrous web 9, its residues or other impurities from the outer circumferential surface. Here, the row of drying cylinders 16 is located above the row of guide rollers 17. In order to ensure that the fibrous web 9 is guided over the drying wire 15 between the drying cylinders 16, suction boxes 19 are provided in each case between two adjacent drying cylinders 16 in the drying wire loop. In normal operation, the suction box 19 sucks the fibrous web 9 onto the drying wire 15 under negative pressure. The suction guide rollers 17, 20 have perforated roller sleeves, the interior of which is connected to a source of negative pressure.
During start-up of the machine or when breaking, the transfer bar 3 is separated from the fibre web 9 by the separating device 2, the transfer bar 3 then having to be transferred into the target zone 1 downstream of the machine. For example, the separating device 2 is arranged in a former, wherein the transfer bar 3 is separated off on the machine operator side 22 at the edge of the fiber web 9. The remaining web 20 of the fibrous web 9 is guided from the forming wire 10 into the machine stack. The separating device 9 is formed here by one or two water-jet nozzles which direct their water-jet streams against the fibrous web 9 supported on the forming wire 10 and separate the discharge-web tips from the fibrous web 9. Basically, the separating device 2 can also be arranged at other positions in the paper machine, wherein the fibrous web 9 can also be cut in the area supported by the wire or in the unsupported area, for example in free-draw. Instead of the nozzle for the outflow of liquid, a laser or mechanical separating device may also be provided, such as a rotating, preferably toothed circular knife, a stationary knife or a needle. However, mechanical separating means are usually only used when the fibrous web 9 travels unsupported.
The transfer bar 3 is guided by dewatering belts 11, 12 through the press section and transferred to the drying wire 15 of the subsequent dryer group. Starting from the drying wire 15, the transfer bar 3 is brought into contact with a rotating roller 4 in the form of a first drying cylinder 16 of the drying unit. After partial coating of the first dryer cylinder 16, the transfer strand 3 is guided downward into the machine stack, in particular into a beater 18 arranged there. The transfer bar 3 then widens gradually until the full width of the fibrous web 9 reaches the rotating rollers 41 and is also led out to the beater 18. The lower side of the fibrous web 9 opposite the top side 9.1 is in direct contact with an internally heated rotating roll 4, which is designed as a dryer cylinder. The drying wire 15 is pressed here against the top side 9.1 of the fibrous web 9. During the fibre web 9 going down into the beater 18, the drying wire 15 is guided off the surface 9.1 at the displacement line 15.1 and to the next guide roll 17. The separating device is then moved back into its starting position. This first transfer step can also be achieved by transferring a fibrous web 9 having the full width without cutting the transfer bar when the wet end design of the paper machine is suitable.
The present invention can be advantageously used in the following transfer step. For transferring the fibrous web 9 into the target area 1, a new transfer bar 3 and a remaining web 20 are formed from the fibrous web 9 wrapping the rotating rolls by the separating device 2. As is known, the transfer bar 3 is transferred from the covered roller 4 to the following machine element 5 by means of a not shown blowing blade in the form of a drying wire 15 of a first dryer group which is guided out of the roller 4. The following machine element 5 may alternatively also be formed by a rotating roller. The widening travel is also achieved after this new transfer bar 3 has been completely transferred into the new target area 1. It is important here, however, that the remaining web 20 reliably passes from the rotating roll 4 down into the machine stack, in particular into the beater 18. In particular, if there is a risk in the widening travel of the transfer bar 3, the remaining web 20 travels uncontrolled together with the following machine element 5, thus resulting in edge defects or breaks. In order to stabilize the travel of the remaining web 20, a stabilizing element 6 facing the top side 9.1 of the fibrous material 9 is thus positioned on the drive side 21 in the space between the rotating roller 4 and the subsequent machine element 5 before or during the widening travel of the conveyor belt 3. The stabilizing element 6 is arranged in the vertical direction between the displacement line 15.1 of the drying wire 15 and the doctor blade 8. The vertical distance 24 of the stabilizing element 6 from the horizontal plane 23 is in this case in the range below the horizontal plane 23 which is less than or equal to 0.9 times the roller radius Rw. The vertical distance 24 may also be in the range of less than or equal to 0.83 roller radius or in the range of less than or equal to 0.6 roller radius. In this way the size of the stabilization zone can be optimized. For certain applications, it is expedient for the vertical distance 24 to be in the range of greater than or equal to 0.4 roller radius, preferably in the range of greater than or equal to 0.45 roller radius, in particular in the range of greater than or equal to 0.5 roller radius. In the example shown in fig. 1 and 2, the stabilizing element 6 is constituted by a guide roller 6 parallel to the axis of the rotating roller 4. In this case, according to fig. 2, the guide roller 6 is positioned in such a way that it only partially covers the residual web 20 before the widening operation and the drive-side edge of the residual web 20 is reliably guided between the rotating roller 4 and the guide roller 6 downward into the beater 18. The positioning of the guide rollers 6 can be done by pivoting or also by translation parallel to the roller axis or perpendicular to the roller axis. In this way the fibrous web 9 is guided through the machine in stages. The transfer device according to the invention can thus also be implemented in different positions of the machine. In the design shown in fig. 1, the guide roller 6 is arranged directly in front of the doctor blade 8 of the rotating roller 4 following in the direction of rotation. Thereby ensuring that the remaining web 20 enters the beater 18 between the guide roll 6 and the doctor blade 8. Furthermore, the guide roller 6 presses the residual web 20 slightly against the rotating roller 4, i.e. the dryer cylinder 16. In a machine operating at high speed, the guide roller 6 can therefore have its own rotary drive. The position of the guide rolls 6 can advantageously be varied transversely to the web travel direction 7, whereby all web widths, coverage and cutting positions of the separating device 2 are controlled. The guide roller 6 has a diameter of between 30 and 300mm and a width of between 20 and 500 mm. Furthermore, the guide roller 6 has an elastic sleeve made of rubber, PU, fabric or the like to protect the outer peripheral surface of the rotating roller 4.
A simplified device view of the rotating roller 4 looking in the production direction during the widening travel of the transfer bar 3 is shown in fig. 2. For clarity, the drying wire 15 is not shown. The transfer bar 3 has been transferred to a subsequent machine element 5. The transfer strip 3 and the remaining web 20 are separated by a cutting line 2.1, which is produced by the separating device 2. The transfer bar 3 that has been transferred leaves the surface of the drying cylinder 16 together with the drying wire 15 at the transfer line 15.1. The stabilizing elements 6, which are designed as guide rolls, are arranged in the drive-side region of the remaining web 20.
Fig. 3a shows a part of fig. 1 together with an alternative stabilization element 6. The difference from fig. 1 and 2 is that instead of guide rollers as stabilizing elements 6, blow pipes are used which are arranged transversely to the web travel direction of the remaining web, blow at least one fluid beam, for example an air beam, onto the remaining web 20 and thereby stabilize the travel of the remaining web 20. The vertical distance 24 of the stabilizing element 6 from the horizontal 23 is in this example in the range of less than or equal to 0.9 times the roller radius Rw. The vertical distance 24 may also be in the range of less than or equal to 0.83 roller radius or in the range of less than or equal to 0.6 roller radius. In this way the size of the stabilization zone can be optimized. For certain applications, it is expedient for the vertical distance 24 to be in the range of greater than or equal to 0.4 roller radius, preferably in the range of greater than or equal to 0.45 roller radius, in particular in the range of greater than or equal to 0.5 roller radius.
Fig. 3b shows that in a possible further development, a blow tube arranged transversely to the web travel direction 7 of the residual web 20 is used, which blows at least one fluid beam, for example an air beam, onto the residual web and cooperates with a guide surface, for example a guide plate, extending in the web travel direction 7 of the residual web 20 in stabilizing the travel of the residual web 20. The stabilizing element 6 thus comprises a blow tube with a guide surface. The fluid beam may also be directed along the guide plate, thereby causing the remaining web 20 to be sucked by the fluid beam and stabilized along the guide plate. The vertical distance 24 of the stabilizing element 6 from the horizontal 23 is in this example in the range of less than or equal to 0.9 times the roller radius Rw. The vertical distance 24 may also be in the range of less than or equal to 0.83 roller radius or in the range of less than or equal to 0.6 roller radius. In this way the size of the stabilization zone can be optimized. For certain applications, it is expedient for the vertical distance 24 to be in the range of greater than or equal to 0.4 roller radius, preferably in the range of greater than or equal to 0.45 roller radius, in particular in the range of greater than or equal to 0.5 roller radius.
Corresponding elements of the embodiments are provided with the same reference numerals in the figures. The functions of these elements correspond to each other in a single figure as long as no other description is made and no conflict arises. And thus will not be described in detail. The invention is not limited to the shown combination of features of the shown embodiments.
List of drawing identifiers
1. Target area
2. Separation device
2.1 Cutting line
3. Transfer strip
4. Rotary roller
5. Subsequent machine element
6. Stabilization element
7. Direction of travel of web
8. Scraper knife
9. Fibrous web
9.1 The top side of the fibrous web
10. Forming wire
11. Dewatering belt
12. Dewatering belt
13. Upper press roll
14. Lower press roll
15. Drying net
15.1 Shift line
16. Drying cylinder
17. Guide roller
18. Beating machine
19. Suction box
20. Surplus web
21. Drive side
22. Operator side
23. Horizontal plane
24. Vertical distance
Roller radius of Rw rotating roller
Claims (28)
1. An apparatus for transferring a fibrous web into a target area (1) in a machine for producing and/or refining a fibrous web (9), having a separating device (2) for separating the fibrous web (9) into a transfer bar (3) and a residual web (20) at a first edge of the fibrous web (9), wherein the transfer bar (3) and the residual web (20) are moved in front of the target area (1) by means of their side opposite to the top side (9.1) of the fibrous web (9) in contact with a rotating roller (4) and partly cover the roller and are guided out of the machine downwards therefrom, and wherein a transfer device is provided for transferring the transfer bar (3) to a subsequent machine element (5) of the target area (1), and wherein the separating device (2) is designed to be movable transversely to a web travel direction (7) for widening the transfer bar (3),
It is characterized in that the method comprises the steps of,
Between the rotating roll (4) and the following machine element (5), before or during widening of the transfer bar (3), a stabilizing element (6) can be positioned opposite the top side in the region of the remaining web (20) for transfer bar stabilization, wherein the stabilizing element (6) at least partially covers the remaining web (20) and the remaining web (20) is guided downwards between the rotating roll (4) and the stabilizing element (6).
2. The apparatus of claim 1, wherein,
During stabilization of the transfer bar, the distance between the stabilizing element (6) and the top side (9.1) of the rotating roll (4) and/or the running residual web (20) is less than 150mm.
3. An apparatus according to claim 1 or2, wherein,
The stabilizing element (6) is designed to be rotatable parallel to the axis of the rotating roller (4).
4. The apparatus of claim 3, wherein,
The stabilizing element (6) has a rotary drive.
5. An apparatus according to claim 1 or 2, wherein,
The stabilizing element (6) is arranged at the edge of the fibrous web (9) opposite the first edge and is dimensioned such that the maximum coverage of the remaining web (20) transversely to the web travel direction (7) is 20mm to 800mm.
6. An apparatus according to claim 1 or 2, wherein,
The stabilizing element (6) presses the remaining web (20) against the rotating roller (4) with an adjustable force during the stabilization of the transfer bar.
7. An apparatus according to claim 1 or 2, wherein,
The stabilizing element (6) is supported on a support, the position of which can be changed transversely to the web travel direction (7) and/or along the web travel direction (7).
8. An apparatus according to claim 1 or 2, wherein,
The stabilizing element (6) is positioned directly before a doctor blade (8) following in the direction of rotation of the rotating roller (4).
9. The apparatus of claim 1, wherein,
The stabilizing element (6) is designed as a guide roller.
10. The apparatus of claim 9, wherein,
The guide roller is provided with an elastic roller sleeve.
11. An apparatus according to claim 9 or 10, wherein,
The guide roller has a diameter between 30mm and 500 mm.
12. The apparatus of claim 5, wherein,
The stabilizing elements (6) are dimensioned such that the maximum coverage of the remaining web (20) transversely to the web travel direction (7) is 20mm to 500mm.
13. The apparatus of claim 5, wherein,
The stabilizing element (6) is dimensioned such that the maximum coverage of the remaining web (20) transversely to the web travel direction (7) is 150mm to 250mm.
14. An apparatus according to claim 1 or 2, wherein,
The distance (24) of the stabilizing element (6) from a horizontal plane (23) extending through the centre of the rotating roller (4, 9) is in the range of less than or equal to 0.9 roller radius (Rw).
15. The apparatus of claim 14, wherein,
The distance (24) of the stabilizing element (6) from a horizontal plane (23) extending through the centre of the rotating roller (4, 9) is in the range of less than or equal to 0.83 roller radius (Rw).
16. The apparatus of claim 14, wherein,
The distance (24) of the stabilizing element (6) from a horizontal plane (23) extending through the centre of the rotating roller (4, 9) is in the range of less than or equal to 0.6 roller radius (Rw).
17. An apparatus according to claim 1 or 2, wherein,
The distance (24) of the stabilizing element (6) from a horizontal plane (23) extending through the centre of the rotating roller (4, 9) is in the range of greater than or equal to 0.4 roller radius (Rw).
18. The apparatus of claim 17, wherein,
The distance (24) of the stabilizing element (6) from a horizontal plane (23) extending through the centre of the rotating roller (4, 9) is in the range of greater than or equal to 0.45 roller radius (Rw).
19. The apparatus of claim 17, wherein,
The distance (24) of the stabilizing element (6) from a horizontal plane (23) extending through the centre of the rotating roller (4, 9) is in the range of greater than or equal to 0.5 roller radius (Rw).
20. The apparatus of claim 11, wherein,
The guide roller has a diameter of between 30mm and 300 mm.
21. The apparatus of claim 11, wherein,
The guide roller has a diameter between 30mm and 200 mm.
22. The device according to claim 1, characterized in that the fibrous web (9) is a paper, board or tissue web.
23. A method for transferring a fibrous web into a target area (1) in a machine for producing and/or refining a fibrous web (9), having a separating device (2) for separating the fibrous web (9) into a transfer bar (3) and a residual web (20) at a first edge of the fibrous web (9), wherein the transfer bar (3) and the residual web (20) are brought into contact with a rotating roller (4) by their sides opposite to the top side (9.1) of the fibrous web (9) before the target area (1) and partly cover the roller and are guided out of the machine downwards by the roller, and wherein the transfer bar (3) is transferred by the transfer device to a subsequent machine element (5) of the target area (1), and wherein the separating device (2) is designed to be movable transversely to a web travel direction (7) for widening the transfer bar (3),
It is characterized in that the method comprises the steps of,
Between the rotating roll (4) and the following machine element (5), before or during widening of the transfer bar (3), a stabilizing element (6) is positioned opposite the top side in the region of the remaining web (20) for transfer bar stabilization, wherein the stabilizing element (6) at least partially covers the remaining web (20) and the remaining web (20) is guided downwards between the rotating roll (4) and the stabilizing element (6).
24. The method of claim 23, wherein,
The stabilizing elements (6) are designed as guide rollers and are arranged at the edge of the fibrous web (9) opposite the first edge and are dimensioned such that the coverage of the remaining web (20) transversely to the web travel direction (7) amounts to 20mm to 800mm.
25. The method of claim 24, wherein,
The stabilizing element (6) is dimensioned such that the residual web (20) has a coverage of 20mm to 500mm transverse to the web travel direction (7).
26. The method of claim 24, wherein,
The stabilizing element (6) is dimensioned such that the residual web (20) has a coverage of 150mm to 250mm transversely to the web travel direction (7).
27. Use of a device according to one of claims 1 to 22 for transferring a fibrous web (9) in a machine for manufacturing and/or refining a fibrous web into a target zone (1), characterized in that the target zone (1) is a first or a second drying cylinder of a first dryer group of a dryer section or a pre-dryer section or a post-dryer section.
28. Use of a device according to one of claims 1 to 22 for transferring a fibrous web (9) in a machine for manufacturing and/or refining a fibrous web into a target area (1), characterized in that the target area (1) is a film press.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019134691.6A DE102019134691A1 (en) | 2019-12-17 | 2019-12-17 | Device and method for transferring a fibrous web |
| DE102019134691.6 | 2019-12-17 | ||
| PCT/EP2020/084221 WO2021121992A1 (en) | 2019-12-17 | 2020-12-02 | Device and method for transferring a fibrous material web |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114846203A CN114846203A (en) | 2022-08-02 |
| CN114846203B true CN114846203B (en) | 2025-10-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080087541.6A Active CN114846203B (en) | 2019-12-17 | 2020-12-02 | Device and method for transferring fibrous webs |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP4077804B1 (en) |
| CN (1) | CN114846203B (en) |
| DE (1) | DE102019134691A1 (en) |
| FI (1) | FI4077804T3 (en) |
| WO (1) | WO2021121992A1 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101148838A (en) * | 2006-09-22 | 2008-03-26 | 沃依特专利有限责任公司 | System for widening a fibre web, method for controlling the transfer of a web tail and machine for producing a sheet of fibrous material |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19914967A1 (en) * | 1999-04-01 | 2000-10-05 | Voith Sulzer Papiertech Patent | Coating station to apply a film and glue to one or both sides of a paper or cardboard web has an array of rollers between adjacent drying groups to give a direct or indirect coating |
| US6398909B1 (en) * | 1999-06-17 | 2002-06-04 | Valmet-Karlstad Aktiebolag | Method and apparatus for imprinting, drying, and reeling a fibrous web |
| US7959761B2 (en) * | 2002-04-12 | 2011-06-14 | Georgia-Pacific Consumer Products Lp | Creping adhesive modifier and process for producing paper products |
| DE102007053700A1 (en) * | 2007-11-10 | 2009-05-14 | Andritz Küsters Gmbh | Device for transferring a flexible material web, in particular a paper or board web |
| DE102008009958B3 (en) * | 2008-02-20 | 2009-05-14 | Paprima Industries Inc., Dorval | Method for protecting web end of paper wed, involves changing of one reel to another reel, where web end runs between paper roller and latter reel |
| DE102008042282A1 (en) * | 2008-09-23 | 2010-03-25 | Voith Patent Gmbh | Machine for producing e.g. paper web, has suction roller arranged in conveying tension belt downstream to delivery region and movable from operating position into another operating position under opening of delivery region |
| DE102011087094A1 (en) * | 2011-11-25 | 2013-05-29 | Voith Patent Gmbh | Method for transferring a material web from a drying arrangement to a downstream functional unit and drying device |
| DE102011087095A1 (en) * | 2011-11-25 | 2013-05-29 | Voith Patent Gmbh | Method for transferring a material web from a drying arrangement to a downstream functional unit and drying device |
| DE102014219404A1 (en) * | 2014-09-25 | 2016-03-31 | Voith Patent Gmbh | Machine and method for producing and / or treating a material web |
| AT521367B1 (en) * | 2019-04-18 | 2020-01-15 | Andritz Ag Maschf | DEVICE AND METHOD FOR CONVERTING A STRIP OF A TRAIN |
-
2019
- 2019-12-17 DE DE102019134691.6A patent/DE102019134691A1/en not_active Ceased
-
2020
- 2020-12-02 FI FIEP20819688.1T patent/FI4077804T3/en active
- 2020-12-02 EP EP20819688.1A patent/EP4077804B1/en active Active
- 2020-12-02 WO PCT/EP2020/084221 patent/WO2021121992A1/en not_active Ceased
- 2020-12-02 CN CN202080087541.6A patent/CN114846203B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101148838A (en) * | 2006-09-22 | 2008-03-26 | 沃依特专利有限责任公司 | System for widening a fibre web, method for controlling the transfer of a web tail and machine for producing a sheet of fibrous material |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4077804B1 (en) | 2023-03-01 |
| WO2021121992A1 (en) | 2021-06-24 |
| DE102019134691A1 (en) | 2020-11-19 |
| CN114846203A (en) | 2022-08-02 |
| FI4077804T3 (en) | 2023-05-09 |
| EP4077804A1 (en) | 2022-10-26 |
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