CA2966775A1 - Air guide plate for leading away an edge strip of a material web, method for leading away an edge strip of the material web, and use of the air guide plate and of the method - Google Patents
Air guide plate for leading away an edge strip of a material web, method for leading away an edge strip of the material web, and use of the air guide plate and of the method Download PDFInfo
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- CA2966775A1 CA2966775A1 CA2966775A CA2966775A CA2966775A1 CA 2966775 A1 CA2966775 A1 CA 2966775A1 CA 2966775 A CA2966775 A CA 2966775A CA 2966775 A CA2966775 A CA 2966775A CA 2966775 A1 CA2966775 A1 CA 2966775A1
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- Prior art keywords
- edge
- strip
- guide plate
- air guide
- material web
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/18—Means for removing cut-out material or waste
- B26D7/1845—Means for removing cut-out material or waste by non mechanical means
- B26D7/1854—Means for removing cut-out material or waste by non mechanical means by air under pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/18—Means for removing cut-out material or waste
- B26D7/1845—Means for removing cut-out material or waste by non mechanical means
- B26D7/1863—Means for removing cut-out material or waste by non mechanical means by suction
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F7/00—Other details of machines for making continuous webs of paper
- D21F7/006—Cutting the edges of the paper-web
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D2007/0012—Details, accessories or auxiliary or special operations not otherwise provided for
- B26D2007/0068—Trimming and removing web edges
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- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Advancing Webs (AREA)
- Paper (AREA)
- Preliminary Treatment Of Fibers (AREA)
Abstract
The invention relates to an air guide plate (1) for leading away an edge strip (2) of a running, planar material web (3), comprising, arranged in the direction of a longitudinal extent axis (L), at least one edge-strip inlet plate (6), one or more blow-out nozzles (71, 72, 73, 74, 75), and at least one edge-strip outlet plate (8), wherein the one or more blow-out nozzles (71, 72, 73, 74, 75) are arranged between the at least one edge-strip inlet plate (6) and the at least one edge-strip outlet plate (8) and the air guide plate (1) has an air-guide-plate outer edge (9) on the side facing away from the center of the material web (3), wherein at least one air draw-in gap (10) is arranged between the one or more blow-out nozzles (71, 72, 73, 74, 75) and the at least one edge-strip outlet plate (8), wherein the at least one air draw-in gap (10) has a length in the direction of the longitudinal extent axis (L) in the range of 0.2 to 5 mm.
Description
Air guide plate for leading away an edge strip of a material web, method for leading away an edge strip of the material web, and use of the air guide plate and of the method BACKGROUND OF THE INVENTION
The present invention relates to an air guide plate for discharging an edge strip of a running, planar material web, to a method for discharging an edge strip of the material web, and to the use of the air guide plate and of the method to discharge an edge strip.
PRIOR ART
In the production of planar material webs, an edge strip is usually detached from both sides of the material web. This detachment takes place for example in order to obtain an exact width of the material web, in order to produce precisely defined edges of the material web, in order to achieve uniform properties and conditions across the width of the material web or of the transverse profile, and in order to ensure a smooth machine run for production reasons. In order that the edge strips detached from the running, planar material web do not run along with the finished material web and possibly become wound up with the finished product produced, the edge strips are usually knocked off and continuously discharged. In order to sever edge strips, nozzle(s) subjected to compressed air, known as knock-down nozzle(s), are used as knock-off devices in the prior art. The discharged edge strips are recycled, where possible, as a valuable resource and fed back to the production process.
Discharging devices for discharging edge strips of a running, planar material web, in particular made of tissue, paper, paperboard, board, film or textile, are known in the prior art. Known discharging devices are for example (discharging) hoppers with or without a
The present invention relates to an air guide plate for discharging an edge strip of a running, planar material web, to a method for discharging an edge strip of the material web, and to the use of the air guide plate and of the method to discharge an edge strip.
PRIOR ART
In the production of planar material webs, an edge strip is usually detached from both sides of the material web. This detachment takes place for example in order to obtain an exact width of the material web, in order to produce precisely defined edges of the material web, in order to achieve uniform properties and conditions across the width of the material web or of the transverse profile, and in order to ensure a smooth machine run for production reasons. In order that the edge strips detached from the running, planar material web do not run along with the finished material web and possibly become wound up with the finished product produced, the edge strips are usually knocked off and continuously discharged. In order to sever edge strips, nozzle(s) subjected to compressed air, known as knock-down nozzle(s), are used as knock-off devices in the prior art. The discharged edge strips are recycled, where possible, as a valuable resource and fed back to the production process.
Discharging devices for discharging edge strips of a running, planar material web, in particular made of tissue, paper, paperboard, board, film or textile, are known in the prior art. Known discharging devices are for example (discharging) hoppers with or without a
- 2 -guide plate. Moreover, vacuum devices and compressed air devices, in particular blowing nozzles and fans, are additionally also used to guide the edge strip.
WO 2013/127008 describes a method and a device for handling edge strips of a paper web. An edge strip detached from the rest of the paper web is guided into a discharging device by an air nozzle, wherein the edge strip is optionally knocked off by the air nozzle, in particular severed, and discharged further into a pulping device, in particular a pulper. For example, vacuum systems, transport fan systems and injector systems are cited as edge-strip conveying systems.
Known air guide plates and methods for discharging an edge strip of a running, planar material web are still worthy of improvement and often have the drawback that, during discharging, only insufficient separation between the detached edge strip and the material web occurs, such that the edge strip is arranged on the material web again and is entrained by the material web. Furthermore, the air guide plates and methods for discharging an edge strip that are known from the prior art do not sufficiently and reliably stabilize the edge strip in order to ensure good guidance of the edge strip. Moreover, the known air guide plates and methods for discharging are not adjustable easily, quickly and reproducibly to different edge-strip widths, production speeds of the material webs and weights per unit area of the edge strip. Furthermore, in the known discharging devices and methods, energy, in particular energy of compressed air systems that are not required, is wasted on account of a lack of and/or imprecise adjustment capabilities.
Therefore, the present invention is based on the object of providing an improved air guide plate and an improved method for discharging a running, planar
WO 2013/127008 describes a method and a device for handling edge strips of a paper web. An edge strip detached from the rest of the paper web is guided into a discharging device by an air nozzle, wherein the edge strip is optionally knocked off by the air nozzle, in particular severed, and discharged further into a pulping device, in particular a pulper. For example, vacuum systems, transport fan systems and injector systems are cited as edge-strip conveying systems.
Known air guide plates and methods for discharging an edge strip of a running, planar material web are still worthy of improvement and often have the drawback that, during discharging, only insufficient separation between the detached edge strip and the material web occurs, such that the edge strip is arranged on the material web again and is entrained by the material web. Furthermore, the air guide plates and methods for discharging an edge strip that are known from the prior art do not sufficiently and reliably stabilize the edge strip in order to ensure good guidance of the edge strip. Moreover, the known air guide plates and methods for discharging are not adjustable easily, quickly and reproducibly to different edge-strip widths, production speeds of the material webs and weights per unit area of the edge strip. Furthermore, in the known discharging devices and methods, energy, in particular energy of compressed air systems that are not required, is wasted on account of a lack of and/or imprecise adjustment capabilities.
Therefore, the present invention is based on the object of providing an improved air guide plate and an improved method for discharging a running, planar
- 3 -material web, in particular made of tissue, paper, paperboard, board, film or textile, in which the abovementioned drawbacks are avoided. In particular, the air guide plate and the method for discharging a material web are intended to allow reliable and reproducible discharging of an edge strip at all weights per unit area and production speeds of the material web and to prevent retroactive arrangement of the edge strip with respect to the material web.
Furthermore, the air guide strip is intended to be adjustable easily, quickly and reproducibly. In particular, losses of production or fluctuations in quality of the material web produced, which can be ascribed to the air guide plate and the method, are intended to be largely avoided.
SUMMARY OF THE INVENTION
Surprisingly, it has now been found that the object is achieved by an air guide plate as claimed in claim 1 and a method.
Compared with known air guide plates, the air guide plate according to the invention for discharging an edge strip of a running, planar material web, in particular made of tissue, paper, paperboard, board, film or textile, has at least one air intake gap between the one or more blow-out nozzle(s) and the at least one edge-strip outlet plate.
Therefore, the subject of the invention is an air guide plate for discharging an edge strip of a running, planar material web, in particular made of tissue, paper, paperboard, board, film or textile having an edge-strip surface that has an edge-strip length in the machine direction and an edge-strip width in the cross-machine direction, an edge-strip outer edge which terminates a lateral edge of the running, planar
Furthermore, the air guide strip is intended to be adjustable easily, quickly and reproducibly. In particular, losses of production or fluctuations in quality of the material web produced, which can be ascribed to the air guide plate and the method, are intended to be largely avoided.
SUMMARY OF THE INVENTION
Surprisingly, it has now been found that the object is achieved by an air guide plate as claimed in claim 1 and a method.
Compared with known air guide plates, the air guide plate according to the invention for discharging an edge strip of a running, planar material web, in particular made of tissue, paper, paperboard, board, film or textile, has at least one air intake gap between the one or more blow-out nozzle(s) and the at least one edge-strip outlet plate.
Therefore, the subject of the invention is an air guide plate for discharging an edge strip of a running, planar material web, in particular made of tissue, paper, paperboard, board, film or textile having an edge-strip surface that has an edge-strip length in the machine direction and an edge-strip width in the cross-machine direction, an edge-strip outer edge which terminates a lateral edge of the running, planar
- 4 -material web toward the outside in the cross-machine direction, and an edge-strip inner edge which is arranged in the direction of the middle of the running, planar material web, comprising, arranged in the direction of an axis of longitudinal extent, at least one edge-strip inlet plate, one or more blow-out nozzle(s) and at least one edge-strip outlet plate, wherein the one or more blow-out nozzle(s) is/are arranged between the at least one edge-strip inlet plate and the at least one edge-strip outlet plate and the air guide plate has an air-guide-plate outer edge on the side away from the middle of the material web, wherein at least one air intake gap is arranged between the one or more blow-out nozzle(s) and the at least one edge-strip outlet plate, wherein the at least one air intake gap has a length in the range of 0.2 to 5 mm in the direction of the axis of longitudinal extent.
A further subject of the invention is a method for discharging an edge strip of a running, planar material web, comprising the following steps of:
a) providing at least one edge strip of a running, planar material web, in particular made of tissue, paper, paperboard, board, film or textile having an edge-strip surface that has an edge-strip length in the machine direction and an edge-strip width in the cross-machine direction, an edge-strip outer edge which terminates a lateral edge of the running, planar material web toward the outside in the cross-machine direction, and an edge-strip inner edge which is arranged in the direction of the middle of the running, planar material web, b) providing at least one air guide plate for discharging the edge strip provided in step a), comprising, arranged in the direction of an axis of longitudinal extent, at least one edge-
A further subject of the invention is a method for discharging an edge strip of a running, planar material web, comprising the following steps of:
a) providing at least one edge strip of a running, planar material web, in particular made of tissue, paper, paperboard, board, film or textile having an edge-strip surface that has an edge-strip length in the machine direction and an edge-strip width in the cross-machine direction, an edge-strip outer edge which terminates a lateral edge of the running, planar material web toward the outside in the cross-machine direction, and an edge-strip inner edge which is arranged in the direction of the middle of the running, planar material web, b) providing at least one air guide plate for discharging the edge strip provided in step a), comprising, arranged in the direction of an axis of longitudinal extent, at least one edge-
- 5 -strip inlet plate, one or more blow-out nozzle(s) and at least one edge-strip outlet plate, wherein the one or more blow-out nozzle(s) is/are arranged between the at least one edge-strip inlet plate and the at least one edge-strip outlet plate and the air guide plate has an air-guide-plate outer edge on the side away from the middle of the material web, c) subjecting the one or more blow-out nozzle(s) to a fluid flow, in particular a compressed air flow, d) discharging the edge strip provided in step a) into at least one discharging device, in particular a discharging hopper, wherein the at least one blow-out nozzle or plurality of blow-out nozzles subjected to the fluid flow emit(s) in the direction of the air-guide-plate outer edge.
A further subject of the invention is the use of the air guide plate in a machine for producing planar material webs, in particular selected from a tissue machine, a paper machine, a board machine, a bogus paper machine, a coater, a laminator, a coating machine, a film machine, a textile machine, a sliver machine and combinations thereof.
A further subject of the invention is the use of the method for discharging an edge strip of a running, planar material web in the production of a planar material web, in particular selected from the production of paper, paperboard, corrugated board, board, graphic papers, packaging papers, hygienic papers, in particular tissue, laminated paper, films, textile webs, fibrous webs and combinations thereof.
DETAILED DESCRIPTION OF THE INVENTION
A further subject of the invention is the use of the air guide plate in a machine for producing planar material webs, in particular selected from a tissue machine, a paper machine, a board machine, a bogus paper machine, a coater, a laminator, a coating machine, a film machine, a textile machine, a sliver machine and combinations thereof.
A further subject of the invention is the use of the method for discharging an edge strip of a running, planar material web in the production of a planar material web, in particular selected from the production of paper, paperboard, corrugated board, board, graphic papers, packaging papers, hygienic papers, in particular tissue, laminated paper, films, textile webs, fibrous webs and combinations thereof.
DETAILED DESCRIPTION OF THE INVENTION
- 6 -In the context of the present invention, running is understood as meaning forward movement at the production speed, in particular of a produced web made of tissue, paper, paperboard, board, laminated paper, films and combinations thereof.
In the context of the present invention, planar is understood as meaning a flat surface which has a minimum thickness with respect to its length in the machine direction and to its width in the cross-machine direction, in each case with respect to the production machine. For example, the thicknesses determined to EN ISO 12625-3:2014 are in the range of 50 pm to 1000 pm.
In the context of the present invention, a material web is understood to be a planar web produced on a web production machine. In particular, a material web is understood to be a produced planar web made of tissue, -paper, paperboard, board, laminated paper, films and combinations thereof.
In the context of the present invention, an air intake gap is understood to be an opening through which ambient air can pass, in particular be drawn in. An air intake gap can in particular be selected from a slot, a hole, a nozzle and combinations thereof.
In a preferred embodiment of the air guide plate according to the invention, the at least one blow-out nozzle is arranged at an enclosed angle, or the plurality of blow-out nozzles are arranged at one or more enclosed angles, in the range of 0 to 45 , preferably in the range of 50 to 20 , to the air-guide-plate outer edge, and face in the direction of the air-guide-plate outer edge.
In the context of the present invention, planar is understood as meaning a flat surface which has a minimum thickness with respect to its length in the machine direction and to its width in the cross-machine direction, in each case with respect to the production machine. For example, the thicknesses determined to EN ISO 12625-3:2014 are in the range of 50 pm to 1000 pm.
In the context of the present invention, a material web is understood to be a planar web produced on a web production machine. In particular, a material web is understood to be a produced planar web made of tissue, -paper, paperboard, board, laminated paper, films and combinations thereof.
In the context of the present invention, an air intake gap is understood to be an opening through which ambient air can pass, in particular be drawn in. An air intake gap can in particular be selected from a slot, a hole, a nozzle and combinations thereof.
In a preferred embodiment of the air guide plate according to the invention, the at least one blow-out nozzle is arranged at an enclosed angle, or the plurality of blow-out nozzles are arranged at one or more enclosed angles, in the range of 0 to 45 , preferably in the range of 50 to 20 , to the air-guide-plate outer edge, and face in the direction of the air-guide-plate outer edge.
- 7 -In a preferred embodiment of the air guide plate according to the invention, one or more blow-out nozzle(s) that is/are subjected to a fluid flow, in particular a compressed-air flow, is/are arranged in the region of the edge strip across the edge-strip width or less than the edge-strip width.
In a preferred embodiment of the air guide plate according to the invention, an axis of rotation, about which the air guide plate is arranged so as to be pivotable, is arranged in the cross-machine direction in the region of the edge-strip inlet plate.
In a preferred embodiment of the air guide plate according to the invention, the air guide plate is arranged so as to be pivotable about the axis of rotation in the cross-machine direction such that an edge strip entering the air guide plate is deflected by an angle in the range of n to 2n, preferably in the range of n to 3/2n, with respect to the entering edge strip.
In a preferred embodiment of the air guide plate according to the invention, at least one knife element is arranged, in the case of the pivotable air guide plate, at the edge-strip outlet side of the at least one edge-strip outlet plate, said knife element forming, with a counterpart knife arranged opposite, a shearing gap when the guide plate is pivoted. In particular, a knife element is selected from an edge, a tip, a blade, a cutting edge, a prong, a perforation, a corrugation and combinations thereof.
In the context of the present invention, a counterpart knife is understood to be a knife which is arranged such that one or more counterpart knives form, with one or the plurality of knife element(s), a shearing device for severing the edge strip of the material web. In
In a preferred embodiment of the air guide plate according to the invention, an axis of rotation, about which the air guide plate is arranged so as to be pivotable, is arranged in the cross-machine direction in the region of the edge-strip inlet plate.
In a preferred embodiment of the air guide plate according to the invention, the air guide plate is arranged so as to be pivotable about the axis of rotation in the cross-machine direction such that an edge strip entering the air guide plate is deflected by an angle in the range of n to 2n, preferably in the range of n to 3/2n, with respect to the entering edge strip.
In a preferred embodiment of the air guide plate according to the invention, at least one knife element is arranged, in the case of the pivotable air guide plate, at the edge-strip outlet side of the at least one edge-strip outlet plate, said knife element forming, with a counterpart knife arranged opposite, a shearing gap when the guide plate is pivoted. In particular, a knife element is selected from an edge, a tip, a blade, a cutting edge, a prong, a perforation, a corrugation and combinations thereof.
In the context of the present invention, a counterpart knife is understood to be a knife which is arranged such that one or more counterpart knives form, with one or the plurality of knife element(s), a shearing device for severing the edge strip of the material web. In
- 8 -particular, a counterpart knife is selected from an edge, a tip, a blade, a cutting edge, a prong, a perforation, a corrugation and combinations thereof.
In the context of the present invention, severing is understood as meaning the dividing from a web of an edge strip in the direction of the edge-strip width in the cross-machine direction.
In a preferred embodiment of the method according to the invention for discharging an edge strip of a running, planar material web, the at least one blow-out nozzle that is subjected to the fluid flow emits at an enclosed angle, or the plurality of blow-out nozzles that are subjected to the fluid flow emit at one or more enclosed angle(s), in the range of 0 to 45 , preferably in the range of 50 to 20 , to the air-guide-plate outer edge.
In a preferred embodiment of the method according to the invention for discharging an edge strip of a running, planar material web, the one or more blow-out nozzle(s) is/are subjected to the fluid flow in the region of the edge strip across the edge-strip width or less than the edge-strip width.
In a preferred embodiment of the method according to the invention for discharging an edge strip of a running, planar material web, the discharging, in step d), of the edge strip, provided in step a), into at least one discharging device is initiated with a pivoting movement of the at least one air guide plate provided in step b).
In a preferred embodiment of the method according to the invention for discharging an edge strip of a running, planar material web, the pivoting movement of the at least one air guide plate provided in step b) is =
In the context of the present invention, severing is understood as meaning the dividing from a web of an edge strip in the direction of the edge-strip width in the cross-machine direction.
In a preferred embodiment of the method according to the invention for discharging an edge strip of a running, planar material web, the at least one blow-out nozzle that is subjected to the fluid flow emits at an enclosed angle, or the plurality of blow-out nozzles that are subjected to the fluid flow emit at one or more enclosed angle(s), in the range of 0 to 45 , preferably in the range of 50 to 20 , to the air-guide-plate outer edge.
In a preferred embodiment of the method according to the invention for discharging an edge strip of a running, planar material web, the one or more blow-out nozzle(s) is/are subjected to the fluid flow in the region of the edge strip across the edge-strip width or less than the edge-strip width.
In a preferred embodiment of the method according to the invention for discharging an edge strip of a running, planar material web, the discharging, in step d), of the edge strip, provided in step a), into at least one discharging device is initiated with a pivoting movement of the at least one air guide plate provided in step b).
In a preferred embodiment of the method according to the invention for discharging an edge strip of a running, planar material web, the pivoting movement of the at least one air guide plate provided in step b) is =
- 9 -carried ,out by a pivoting device selected from an electric pivoting device, a pneumatic pivoting device, a hydraulic pivoting device and combinations thereof.
In the context of the present invention, an electric pivoting device is understood to be an electrically operated pivoting device.
In the context of the present invention, a pneumatic pivoting device is understood to be a pneumatically operated pivoting device.
In the context of the present invention, a hydraulic pivoting device is understood to be a hydraulically operated pivoting device.
In a preferred embodiment of the method according to the invention for discharging an edge strip of a running, planar material web, the pivoting movement of the at least one air guide plate provided in step b) is carried out at an angle in the range of n to 2n, preferably in the range of n to 3/2n, with respect to the entering edge strip.
In a preferred embodiment of the method according to the invention for discharging an edge strip of a running, planar material web, the edge strip is severed, during the pivoting movement, by shear stress between at least one knife element arranged on the at least one edge-strip outlet plate and a counterpart knife arranged opposite.
In a preferred embodiment of the method according to the invention for discharging an edge strip of a running, planar material web, in a further step e), the edge strip discharged into at least one discharging device in step d) is introduced into at least one pulping device, in particular a pulper.
In the context of the present invention, an electric pivoting device is understood to be an electrically operated pivoting device.
In the context of the present invention, a pneumatic pivoting device is understood to be a pneumatically operated pivoting device.
In the context of the present invention, a hydraulic pivoting device is understood to be a hydraulically operated pivoting device.
In a preferred embodiment of the method according to the invention for discharging an edge strip of a running, planar material web, the pivoting movement of the at least one air guide plate provided in step b) is carried out at an angle in the range of n to 2n, preferably in the range of n to 3/2n, with respect to the entering edge strip.
In a preferred embodiment of the method according to the invention for discharging an edge strip of a running, planar material web, the edge strip is severed, during the pivoting movement, by shear stress between at least one knife element arranged on the at least one edge-strip outlet plate and a counterpart knife arranged opposite.
In a preferred embodiment of the method according to the invention for discharging an edge strip of a running, planar material web, in a further step e), the edge strip discharged into at least one discharging device in step d) is introduced into at least one pulping device, in particular a pulper.
- 10 -In a preferred embodiment of the method according to the invention for discharging an edge strip of a running, planar material web, the introduction of the severed edge strip is carried out in combination with a knock-off device.
DESCRIPTION OF THE FIGURES AND EXAMPLES
The invention will now be explained in the following text by way of figures 1 to 3 and exemplary embodiment 1.
Figure 1 schematically shows a cross section through the air guide plate according to one embodiment of the invention, Figure 2 schematically shows a detail of a view of the air guide plate according to one embodiment of the invention with a material web arranged above the air guide plate, Figure 3 schematically shows a cross section through a pivotable air guide plate according to an embodiment of the invention according to figure 1, with different angular positions of the air guide plate.
Figure 1 illustrates an embodiment of an air guide plate 1 according to the invention schematically as a cross section in the machine direction MD. The air guide plate 1 comprises an edge-strip inlet plate 6, one or more blow-out nozzle(s) 71, 72, 73, 74, 75, an air intake gap 10 and an edge-strip outlet plate 8. The edge-strip inlet plate 6, the one or more blow-out nozzle(s) 71, 72, 73, 74, 75, the air intake gap 10 and the edge-strip outlet plate 8 are arranged along an axis of longitudinal extent L. The cross profile of the
DESCRIPTION OF THE FIGURES AND EXAMPLES
The invention will now be explained in the following text by way of figures 1 to 3 and exemplary embodiment 1.
Figure 1 schematically shows a cross section through the air guide plate according to one embodiment of the invention, Figure 2 schematically shows a detail of a view of the air guide plate according to one embodiment of the invention with a material web arranged above the air guide plate, Figure 3 schematically shows a cross section through a pivotable air guide plate according to an embodiment of the invention according to figure 1, with different angular positions of the air guide plate.
Figure 1 illustrates an embodiment of an air guide plate 1 according to the invention schematically as a cross section in the machine direction MD. The air guide plate 1 comprises an edge-strip inlet plate 6, one or more blow-out nozzle(s) 71, 72, 73, 74, 75, an air intake gap 10 and an edge-strip outlet plate 8. The edge-strip inlet plate 6, the one or more blow-out nozzle(s) 71, 72, 73, 74, 75, the air intake gap 10 and the edge-strip outlet plate 8 are arranged along an axis of longitudinal extent L. The cross profile of the
- 11 -air guide plate 1 can resemble an airfoil cross profile. An entering edge strip 2 is guided over the edge-strip inlet plate 6, caught by a fluid flow S
which flows out of the one or more blow-out nozzle(s) 71, 72, 73, 74, 75, guided past the air intake gap 10 and guided in the direction of the edge-strip outlet plate 8. The air guide plate 1 has an axis of rotation D, about which it is pivotable. In the illustrated position, the air guide plate 1 has been pivoted into a discharging device 13. A pivoting radius of the air guide plate 1 is depicted as a dashed line. The edge strip 2 is guided in a direction of forward movement V
into the discharging device 13 by the air guide plate 1. On the pivoting-in side for the air guide plate 1, a counterpart knife 12 is arranged on the discharging device 13. When the air guide plate 1 is pivoted in, when the knife element 11 and the counterpart knife 12 are located opposite one another, a shearing gap is formed, in which the edge strip 2 is severed. The edge strip 2 is guided out of the discharging device 13 into a pulping device 14.
Figure 2 schematically illustrates a detail of a view of the air guide plate 1 according to one embodiment of the invention with a material web 3 arranged above the air guide plate 1. The edge strip 2 has been detached from the material web 3. The edge strip 2 has an edge-strip width B in the cross-machine direction CD, an edge-strip outer edge 4, an edge-strip inner edge 5, and is guided in the direction of forward movement V.
The edge-strip outer edge 4 terminates, in the cross-machine direction CD, a lateral edge of the running, planar material web 3 toward the outside. The edge-strip inner edge 5 is arranged in the direction of the middle of the running, planar material web 3. The edge strip 2 is arranged such that it runs in via the edge-strip inlet plate 6 of the air guide plate 1, via the blow-out nozzle(s) 71, 72, 73, 74, 75, the air intake
which flows out of the one or more blow-out nozzle(s) 71, 72, 73, 74, 75, guided past the air intake gap 10 and guided in the direction of the edge-strip outlet plate 8. The air guide plate 1 has an axis of rotation D, about which it is pivotable. In the illustrated position, the air guide plate 1 has been pivoted into a discharging device 13. A pivoting radius of the air guide plate 1 is depicted as a dashed line. The edge strip 2 is guided in a direction of forward movement V
into the discharging device 13 by the air guide plate 1. On the pivoting-in side for the air guide plate 1, a counterpart knife 12 is arranged on the discharging device 13. When the air guide plate 1 is pivoted in, when the knife element 11 and the counterpart knife 12 are located opposite one another, a shearing gap is formed, in which the edge strip 2 is severed. The edge strip 2 is guided out of the discharging device 13 into a pulping device 14.
Figure 2 schematically illustrates a detail of a view of the air guide plate 1 according to one embodiment of the invention with a material web 3 arranged above the air guide plate 1. The edge strip 2 has been detached from the material web 3. The edge strip 2 has an edge-strip width B in the cross-machine direction CD, an edge-strip outer edge 4, an edge-strip inner edge 5, and is guided in the direction of forward movement V.
The edge-strip outer edge 4 terminates, in the cross-machine direction CD, a lateral edge of the running, planar material web 3 toward the outside. The edge-strip inner edge 5 is arranged in the direction of the middle of the running, planar material web 3. The edge strip 2 is arranged such that it runs in via the edge-strip inlet plate 6 of the air guide plate 1, via the blow-out nozzle(s) 71, 72, 73, 74, 75, the air intake
- 12 -gap 10 and the edge-strip outlet plate 8. The edge-strip inlet plate 6, the blow-out nozzle(s) 71, 72, 73, 74, 75, the air intake gap 10 and the edge-strip outlet plate 8 are arranged along the axis of longitudinal extent L. The air guide plate 1 has an air-guide-plate outer edge 9, which is arranged on the side away from the middle of the material web 3. The blow-out nozzle(s) 71, 72, 73, 74, 75 face in the direction of the air-guide-plate outer edge 9 and are arranged at an enclosed angle a which is formed between the at least one of the respective blow-out nozzle(s) 71, 72, 73, 74, 75 and the air-guide-plate outer edge 9.
Figure 3 schematically illustrates a cross section through the air guide plate 1 in the machine direction MD according to an embodiment of the invention according to figure 1, with differently arranged angular positions of the air guide plate 1. The edge-strip inlet plate 6, the blow-out nozzle(s) 71, 72, 73, 74, 75, the air intake gap 10 and the edge-strip outlet plate 8 are arranged along the axis of longitudinal extent L. The air guide plate 1 is arranged so as to be pivotable about the axis of rotation D and can be pivoted for example from a position of the air guide plate 1 that is illustrated by dashed lines into a position of the air guide plate 1 that is illustrated by solid lines. The direction of the axis of longitudinal extent L is different in the position illustrated by dashed lines than the position of the air guide plate 1 that is illustrated by solid lines.
The knife element 11 is illustrated as an optional embodiment. When the air guide plate 1 is pivoted out of the position illustrated by dashed lines into the position illustrated by solid lines, the edge strip 2 is guided over the counterpart knife 12 by the air guide plate 1, wherein the edge strip 2 is severed. The edge strip 2 is discharged into the discharging device in the direction of forward movement V in the position
Figure 3 schematically illustrates a cross section through the air guide plate 1 in the machine direction MD according to an embodiment of the invention according to figure 1, with differently arranged angular positions of the air guide plate 1. The edge-strip inlet plate 6, the blow-out nozzle(s) 71, 72, 73, 74, 75, the air intake gap 10 and the edge-strip outlet plate 8 are arranged along the axis of longitudinal extent L. The air guide plate 1 is arranged so as to be pivotable about the axis of rotation D and can be pivoted for example from a position of the air guide plate 1 that is illustrated by dashed lines into a position of the air guide plate 1 that is illustrated by solid lines. The direction of the axis of longitudinal extent L is different in the position illustrated by dashed lines than the position of the air guide plate 1 that is illustrated by solid lines.
The knife element 11 is illustrated as an optional embodiment. When the air guide plate 1 is pivoted out of the position illustrated by dashed lines into the position illustrated by solid lines, the edge strip 2 is guided over the counterpart knife 12 by the air guide plate 1, wherein the edge strip 2 is severed. The edge strip 2 is discharged into the discharging device in the direction of forward movement V in the position
- 13 -of the air guide plate 1 that is illustrated by solid lines.
List of reference signs 1: Air guide plate 2: Edge strip 3: Material web(s) 4: Edge-strip outer edge 5: Edge-strip inner edge 6: Edge-strip inlet plate 71, 72, 73, 74, 75: Blow-out nozzle(s) 8: Edge-strip outlet plate 9: Air-guide-plate outer edge 10: Air intake gap 11: Knife element 12: Counterpart knife 13: Discharging device
List of reference signs 1: Air guide plate 2: Edge strip 3: Material web(s) 4: Edge-strip outer edge 5: Edge-strip inner edge 6: Edge-strip inlet plate 71, 72, 73, 74, 75: Blow-out nozzle(s) 8: Edge-strip outlet plate 9: Air-guide-plate outer edge 10: Air intake gap 11: Knife element 12: Counterpart knife 13: Discharging device
14: Pulping device B: Edge-strip width D: Axis of rotation CD: Cross-machine direction MD: Machine direction L: Axis of longitudinal extent S: Fluid flow V: Direction of forward movement of the planar material web a: Enclosed angle Example 1 The air guide plate according to the invention was tested as a fixed air guide plate and as a pivotable air guide plate. The air guide plate was mounted under the material web, in particular a paper web. The air guide plate had between one and ten blow-out nozzles and the air intake gap between the blow-out nozzles and the edge-strip outlet plate had a length in the range of 0.2 to 5 mm in the direction of the axis of longitudinal extent. The blow-out nozzles were oriented in the direction of the air-guide-plate outer edge and arranged at an enclosed angle of 00 to 45 , preferably 50 to 20 , to the air-guide-plate outer edge.
The edge strip was introduced into a discharging hopper or a discharging channel by the air guide plate. In part tests, nozzles, for example those known as Vits nozzles, were arranged in the discharging channel. In combination with the air guide plate according to the invention, in order to knock off the edge strip, pressurized knock-down nozzles were also tested as a separating device for the edge strip. In a further preferred embodiment, the surfaces of the air guide plate according to the invention were provided with a nonstick coating, in particular a TerraDry GT3/CT3 from the company Voith Paper Onsite Services, Workshop, Parhalahti, Finland. In a further preferred embodiment, the nonstick coating was made of polytetrafluoroethylene, in particular Teflon. In a further preferred embodiment, the air guide plate according to the invention was produced from plastic, for example UHMWPE, with or without the addition of glass beads.
The edge strip was introduced into a discharging hopper or a discharging channel by the air guide plate. In part tests, nozzles, for example those known as Vits nozzles, were arranged in the discharging channel. In combination with the air guide plate according to the invention, in order to knock off the edge strip, pressurized knock-down nozzles were also tested as a separating device for the edge strip. In a further preferred embodiment, the surfaces of the air guide plate according to the invention were provided with a nonstick coating, in particular a TerraDry GT3/CT3 from the company Voith Paper Onsite Services, Workshop, Parhalahti, Finland. In a further preferred embodiment, the nonstick coating was made of polytetrafluoroethylene, in particular Teflon. In a further preferred embodiment, the air guide plate according to the invention was produced from plastic, for example UHMWPE, with or without the addition of glass beads.
Claims (13)
1. An air guide plate (1) for discharging an edge strip (2) of a running, planar material web (3), in particular made of tissue, paper, paperboard, board, film or textile having an edge-strip surface that has an edge-strip length in the machine direction (MD) and an edge-strip width (B) in the cross-machine direction (CD), an edge-strip outer edge (4) which terminates a lateral edge of the running, planar material web (3) toward the outside in the cross-machine direction (CD), and an edge-strip inner edge (5) which is arranged in the direction of the middle of the running, planar material web (3), comprising, arranged in the direction of an axis of longitudinal extent (L), at least one edge-strip inlet plate (6), one or more blow-out nozzle(s) (71, 72, 73, 74, 75) and at least one edge-strip outlet plate (8), wherein the one or more blow-out nozzle(s) (71, 72, 73, 74, 75) is/are arranged between the at least one edge-strip inlet plate (6) and the at least one edge-strip outlet plate (8) and the air guide plate (1) has an air-guide-plate outer edge (9) on the side away from the middle of the material web (3) , characterized in that at least one air intake gap (10) is arranged between the one or more blow-out nozzle(s) (71, 72, 73, 74, 75) and the at least one edge-strip outlet plate (8), wherein the at least one air intake gap (10) has a length in the range of 0.2 to 5 mm in the direction of the axis of longitudinal extent (L).
2. The air guide plate (1) as claimed in claim 1, wherein the at least one blow-out nozzle (71, 72, 73, 74, 75) is arranged at an enclosed angle (a), or the plurality of blow-out nozzles (71, 72, 73, 74, 75) are arranged at one or more enclosed angles (a), in the range of 0° to 45°, preferably in the range of 5° to 20°, to the air-guide-plate outer edge (9), and face in the direction of the air-guide-plate outer edge (9).
3. The air guide plate (1) as claimed in either of the preceding claims, wherein one or more blow-out nozzle(s) (71, 72, 73, 74, 75) that is/are subjected to a fluid flow (S), in particular a compressed-air flow, is/are arranged in the region of the edge strip (2) across the edge-strip width (B) or less than the edge-strip width (B).
4. The air guide plate (1) as claimed in one of the preceding claims, wherein an axis of rotation (D), about which the air guide plate (1) is arranged so as to be pivotable, is arranged in the cross-machine direction (CD) in the region of the edge-strip inlet plate (6).
5. The air guide plate (1) as claimed in the preceding claim 4, wherein the air guide plate (1) is arranged so as to be pivotable about the axis of rotation (D) in the cross-machine direction (CD) such that an edge strip (2) entering the air guide plate (1) is deflected by an angle in the range of n to 2n, preferably in the range of n to 3/2n, with respect to the entering edge strip (2).
6. A method for discharging an edge strip (2) of a running, planar material web (3), comprising the following steps of:
a. providing at least one edge strip (2) of a running, planar material web (3), in particular made of tissue, paper, paperboard, board, film or textile having an edge-strip surface that has an edge-strip length in the machine direction (MD) and an edge-strip width (B) in the cross-machine direction (CD), an edge-strip outer edge (4) which terminates a lateral edge of the running, planar material web (3) toward the outside in the cross-machine direction (CD), and an edge-strip inner edge (5) which is arranged in the direction of the middle of the running, planar material web (3), b. providing at least one air guide plate (1), as claimed in one of the preceding claims 1 to 5, for discharging the edge strip (2) provided in step a), comprising, arranged in the direction of an axis of longitudinal extent (L), at least one edge-strip inlet plate (6), one or more blow-out nozzle(s) (71, 72, 73, 74, 75) and at least one edge-strip outlet plate (8), wherein the one or more blow-out nozzle(s) (71, 72, 73, 74, 75) is/are arranged between the at least one edge-strip inlet plate (6) and the at least one edge-strip outlet plate (8) and the air guide plate (1) has an air-guide-plate outer edge (9) on the side away from the middle of the material web (3), c. subjecting the one or more blow-out nozzle(s) (71, 72, 73, 74, 75) to a fluid flow (S), in particular a compressed air flow, d. discharging the edge strip (2) provided in step a) into at least one discharging device (13), in particular a discharging hopper, characterized in that the at least one blow-out nozzle (71, 72, 73, 74, 75) or plurality of blow-out nozzles (71, 72, 73, 74, 75) subjected to the fluid flow (S) emit(s) in the direction of the air-guide-plate outer edge (9) .
a. providing at least one edge strip (2) of a running, planar material web (3), in particular made of tissue, paper, paperboard, board, film or textile having an edge-strip surface that has an edge-strip length in the machine direction (MD) and an edge-strip width (B) in the cross-machine direction (CD), an edge-strip outer edge (4) which terminates a lateral edge of the running, planar material web (3) toward the outside in the cross-machine direction (CD), and an edge-strip inner edge (5) which is arranged in the direction of the middle of the running, planar material web (3), b. providing at least one air guide plate (1), as claimed in one of the preceding claims 1 to 5, for discharging the edge strip (2) provided in step a), comprising, arranged in the direction of an axis of longitudinal extent (L), at least one edge-strip inlet plate (6), one or more blow-out nozzle(s) (71, 72, 73, 74, 75) and at least one edge-strip outlet plate (8), wherein the one or more blow-out nozzle(s) (71, 72, 73, 74, 75) is/are arranged between the at least one edge-strip inlet plate (6) and the at least one edge-strip outlet plate (8) and the air guide plate (1) has an air-guide-plate outer edge (9) on the side away from the middle of the material web (3), c. subjecting the one or more blow-out nozzle(s) (71, 72, 73, 74, 75) to a fluid flow (S), in particular a compressed air flow, d. discharging the edge strip (2) provided in step a) into at least one discharging device (13), in particular a discharging hopper, characterized in that the at least one blow-out nozzle (71, 72, 73, 74, 75) or plurality of blow-out nozzles (71, 72, 73, 74, 75) subjected to the fluid flow (S) emit(s) in the direction of the air-guide-plate outer edge (9) .
7. The method as claimed in the preceding claim 6, wherein the at least one blow-out nozzle (71, 72, 73, 74, 75) that is subjected to the fluid flow (S) emits at an enclosed angle (.alpha.), or the plurality of blow-out nozzles (71, 72, 73, 74, 75) that are subjected to the fluid flow emit at one or more enclosed angle(s) (.alpha.), in the range of 0°
to 45°, preferably in the range of 5° to 20°, to the air-guide-plate outer edge (9).
to 45°, preferably in the range of 5° to 20°, to the air-guide-plate outer edge (9).
8. The method as claimed in either of the preceding claims 6 and 7, wherein only the one or more blow-out nozzle(s) (71, 72, 73, 74, 75) is/are subjected to the fluid flow (S) in the region of the edge strip (2) across the edge-strip width (B) or less than the edge-strip width (B).
9. The method as claimed in one of the preceding claims 6 to 8, wherein the discharging, in step d), of the edge strip (2), provided in step a), into at least one discharging device (13) is initiated with a pivoting movement of the at least one air guide plate (1) provided in step b).
10. The method as claimed in the preceding claim 9, wherein the pivoting movement of the at least one air guide plate (1) provided in step b) is carried out at an angle in the range of n to 2n, preferably in the range of n to 3/2n, with respect to the entering edge strip (2).
11. The method as claimed in one of the preceding claims 6 to 10, wherein, in a further step e), the edge strip (2) discharged into at least one discharging device (13) in step d) is introduced into at least one pulping device (14), in particular a pulper.
12. The use of the air guide plate (1) as claimed in one of the preceding claims 1 to 5 in a machine for producing planar material webs (3), in particular selected from a tissue machine, a paper machine, a board machine, a bogus paper machine, a coater, a laminator, a coating machine, a film machine, a textile machine, a sliver machine and combinations thereof.
13. The use of the method for discharging an edge strip (2) of a running, planar material web (3), as claimed in one of the preceding claims 6 to 11, in the production of a planar material web (3), in particular selected from the production of paper, paperboard, corrugated board, board, graphic papers, packaging papers, hygienic papers, in particular tissue, laminated paper, films, textile webs, fibrous webs and combinations thereof.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102014222550 | 2014-11-05 | ||
| DE102014222550.7 | 2014-11-05 | ||
| PCT/EP2015/073324 WO2016071071A1 (en) | 2014-11-05 | 2015-10-09 | Air guide plate for leading away an edge strip of a material web, method for leading away an edge strip of the material web, and use of the air guide plate and of the method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2966775A1 true CA2966775A1 (en) | 2016-05-12 |
| CA2966775C CA2966775C (en) | 2018-11-06 |
Family
ID=54256756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2966775A Expired - Fee Related CA2966775C (en) | 2014-11-05 | 2015-10-09 | Air guide plate for leading away an edge strip of a material web, method for leading away an edge strip of the material web, and use of the air guide plate and of the method |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3215324B1 (en) |
| CN (1) | CN107073736B (en) |
| CA (1) | CA2966775C (en) |
| WO (1) | WO2016071071A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111874715B (en) * | 2020-07-04 | 2022-07-19 | 东莞市全泰纸品有限公司 | Corrugated board production line |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI124385B (en) * | 2007-08-10 | 2014-08-15 | Valmet Technologies Inc | Edge cutting and removal arrangement |
| DE102007042025B4 (en) * | 2007-09-05 | 2018-12-20 | Windmöller & Hölscher Kg | Device and method for guiding a material web |
| WO2010098044A1 (en) * | 2009-02-26 | 2010-09-02 | コニカミノルタオプト株式会社 | Method for producing optical film, optical film, polarizer, and liquid crystal display apparatus |
| FI125148B (en) * | 2011-06-07 | 2015-06-15 | Valmet Technologies Inc | Tip pulling device and cutting device for a feed tip for a fiber web machine |
| US9217225B2 (en) | 2012-02-28 | 2015-12-22 | Paprima Industries Inc. | Paper manufacturing |
-
2015
- 2015-10-09 CA CA2966775A patent/CA2966775C/en not_active Expired - Fee Related
- 2015-10-09 WO PCT/EP2015/073324 patent/WO2016071071A1/en active Application Filing
- 2015-10-09 EP EP15775459.9A patent/EP3215324B1/en not_active Not-in-force
- 2015-10-09 CN CN201580056754.1A patent/CN107073736B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016071071A1 (en) | 2016-05-12 |
| EP3215324B1 (en) | 2018-11-21 |
| EP3215324A1 (en) | 2017-09-13 |
| CA2966775C (en) | 2018-11-06 |
| CN107073736A (en) | 2017-08-18 |
| CN107073736B (en) | 2019-09-13 |
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