WO2013092093A1 - Section de séchage - Google Patents

Section de séchage Download PDF

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Publication number
WO2013092093A1
WO2013092093A1 PCT/EP2012/073288 EP2012073288W WO2013092093A1 WO 2013092093 A1 WO2013092093 A1 WO 2013092093A1 EP 2012073288 W EP2012073288 W EP 2012073288W WO 2013092093 A1 WO2013092093 A1 WO 2013092093A1
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WO
WIPO (PCT)
Prior art keywords
drying
arrangement
transfer
region
strip
Prior art date
Application number
PCT/EP2012/073288
Other languages
German (de)
English (en)
Inventor
Roland Scheiflinger
Stevan Lomic
Stephan Hampe
Georg Bacovsky
Original Assignee
Voith Patent Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Voith Patent Gmbh filed Critical Voith Patent Gmbh
Publication of WO2013092093A1 publication Critical patent/WO2013092093A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • 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
    • D21G9/0072—Devices for threading a web tail through a paper-making machine using at least one rope

Definitions

  • the invention relates to a dryer section for a machine for producing and / or treating a material web, in particular fibrous web, with a transfer system for transferring a strip of the material web, comprising at least a first transfer area with a cable arrangement and a second transfer area downstream of the first transfer area via a transition area with a cable arrangement, wherein the transition region extends from a release region of the first transfer region for the strip to a clamping region formed by the cable arrangement of the second transfer region for the strip.
  • a strip about 20 cm wide is cut and guided to the end of this device. Then the strip is opened full width drove. In this case, this is usually a arranged in the cross-machine direction at the edge of the web strip, which is also referred to as edge strip.
  • edge strip With regard to the individual known transfer methods which can be used, reference is made, by way of example, to Peter Haider: “Railway and Strip Transfer in Cardboard and Packaging Machines", twogether, Voith Sulzer Textiltechnik GmbH, 4/07 pp. 41 to 48.
  • rope-based transfer systems is characterized by the shooting of the strip into a rope scissors formed of three ropes.
  • the cable arrangement extends laterally from the theoretical extent of the material web and extends at least through the respective drying arrangement of the dryer section, in order to guide the material web clamped in the rope cutter in each case to the successive functional units of the drying arrangement.
  • Such transfer systems are very long and breaks in the web within these drying arrangements can lead to undesirable effects.
  • a transitional area between the individual transfer systems is therefore provided in series connection of transfer areas.
  • the strip must be deflected from its position in the direction of travel of the material web considered in the rope level before it is then clamped between the ropes of the rope guide is led to the end of the dryer section.
  • the higher the dry content (40% to 95% TG) the greater the required deflection due to shrinkage of the fibrous web.
  • the operability of the corresponding apparatus for producing and / or processing a material web essentially depends on whether the strip can also be successfully guided to the end of it. This depends largely on the quality of the Clamp the strip. Very strong required deflections of the strip can lead to impairment of the transfer attempt. Especially with long dryer sections, the loss of the strip leads to large time losses.
  • the invention is therefore based on the object, a dryer section of a machine for the production and / or treatment of a web to develop such that the disadvantages mentioned are avoided, in particular a stable transfer even in long drying sections and combined transfer systems as gentle as possible deflection of the strip in the transition region is ensured to the next rope arrangement to achieve a very good quality of Stsammlungklemmung.
  • a besau with respect to a horizontal plane at an angle in the range of respectively including 0 ° to 20 °, preferably 0 ° to 15 ° inclined arranged besau
  • Portable conveyor belt in particular vacuum belt, which is directly upstream of the clamping area.
  • a fibrous web which may be in the form of a paper, board or tissue web understood.
  • Other configurations of the material web are also conceivable.
  • a strip is understood in particular to mean a strip-shaped subregion of a material web, the extent of which in the width direction is characterized by a substantially smaller width than in the longitudinal direction.
  • the width of the strip can vary in the longitudinal direction, in particular be characterized by a continuous change or be kept constant over a predefined length range.
  • Stripes are generally formed by so-called edge strips, which are produced in the lateral end regions of the material web by cutting them through further formation of a residual web and are characterized by a width in the range of 50 mm. To 500 mm.
  • the web travel path describes the path of the web through the device for producing and / or treating a material web.
  • the web running direction describes the direction of the guide path and may be subject to change.
  • the direction of travel of the web of material corresponds to the direction of movement of the web through the apparatus for producing and / or treating a web of material and thus coincides with the machine direction, i. Longitudinal direction of the machine together.
  • the release area of the first transfer area corresponds to the last position of the strip of the material web in the web running direction before the deflection in the downstream in the web running direction cable arrangement and thus the last position in the first transfer area.
  • the release area is formed on a device, in particular a component or a component in the first transfer area, at which the strip experiences a direct support with respect to its position, for example on a roller and / or covering.
  • a cable arrangement is understood to mean an arrangement of two or more endless cables, which can be brought together to form a cable cutter to form a clamping area and are designed to be able to guide the strip through areas of the dry arrangement.
  • a conveyor belt is understood to mean an endlessly circulating belt.
  • the conveyor belt is arranged and adapted to be able to receive and guide the strip on part of its circulation path.
  • the width of the conveyor belt is chosen such that it corresponds at least to the width of a minimally received strip.
  • the solution according to the invention has the advantage of subdividing long drying sections functionally with regard to the transfer into individual sections with cable transfer, wherein the guide takes place in the transition region between these supported on the conveyor belt and directed into the subsequent cable arrangement. Due to the at least in a portion of the transition region supported leadership of the strip can be dispensed with long continuous cable transfer areas, the number of individual cable transfer areas while reducing their extension can be increased in the web running direction. The arrangement and design of the individual, now shorter transfer areas with cable arrangement takes place in dependence on the possibilities for removing a residual web.
  • the part of the circulation path of the conveyor belt theoretically usable for guiding the strip has a length of> 1 m, preferably> 1.5 m.
  • the size of the theoretical guide area through the conveyor belt allows a very gentle and sensitive deflection of the strip with the same or greater Auslenkweg compared to the Prior art designs reducing the deflection angle in the cable assembly.
  • the strip is less stressed and can be injected safely into the rope assembly.
  • the conditional by extension of the web travel path in the transition region gentle deflection leads to an improvement in the clamping quality between the ropes of the cable arrangement.
  • the conveyor belt transversely to the direction of rotation has an extension in the range of 100 mm to 200 mm, preferably 150 mm are used.
  • the conveyor belt in a particularly advantageous training from its functional position when shooting the strip in the rope scissors moved out, especially in a parked position be brought.
  • the transition region comprises at least one region in which the web guide is free of means for the direct support of the material web. This offers advantages regarding stable web travel.
  • the web guide at least indirectly influencing functional components and units are provided in the transition region. These can be used both alone and in combination with other such functional components and units in the device.
  • At least one knock-off device for the strip is provided in the region of a free path of the web guide in the transition region.
  • This design offers the advantage that, starting from this position, the transfer operation can be restarted if the strip does not remain clamped in the ropes until the end of the cable arrangement in the strip transfer system. This leads to a considerable time savings over other strip transfer systems.
  • means for stabilizing the web guide are provided in the transition region.
  • the strip is preferably fired by means of tools in the rope scissors of the cable guide system. Such aids are preferably blowing devices, in particular blast tables.
  • the transition region is preferably arranged and designed such that the theoretical length of the web travel path in the transition region viewed in the web running direction between release area on the drying cylinder> 1, 5 m, preferably> 3.5 m, more preferably> 4 m. Considered by this relatively long deflection in the machine direction and very large Auslenkwege for the strips can be realized and thus made an optimal adaptation to the specific conditions and application requirements.
  • the arrangement of the strip transfer system takes place in dry arrangements which form in series in dry groups, wherein the transition region of the transfer system is arranged in the separation region between the two dryer groups.
  • the apparatus comprises a drying section with at least two drying arrangements arranged in series one behind the other, wherein the strip transfer system is arranged such that it forms a transfer area with cable arrangement in a first drying arrangement in the direction of passage of the material web and a further transfer area with a cable arrangement in a drying arrangement downstream of this drying arrangement , wherein the transition region between the two transfer regions is arranged in the transition region between the drying arrangements.
  • the first drying arrangement in the direction of passage of the material web is formed in a first embodiment as a single-row drying arrangement.
  • the drying arrangement arranged downstream of this drying arrangement is a double-row Dry arrangement executed.
  • the first and the second drying arrangement are designed as a double-row drying arrangement, each comprising a plurality of arranged in two vertically stacked and in the machine direction staggered rows arranged heatable drying cylinders, each associated with a drying belt, the drying cylinders of a row and the drying cylinders associated deflection rollers meandering around while applying the material web against the surface of the drying cylinder, wherein the release region is provided at the last drying cylinder in the direction of passage of the upper row in the vertical direction. It is crucial that within the two-row drying arrangement or at the end of this is given a possibility for web removal.
  • the train of the strip can be adjusted in the transition region.
  • the last roller in the direction of passage of the fibrous web in the first transfer area and the first roller in the passage direction are at least indirectly drivable in the second transfer area such that they are suitable for being operated at different speeds.
  • the mentioned roller may be a deflection roller or a drying cylinder.
  • the first roller in the second transfer region is optionally made heatable and / or coated.
  • at least two rollers are provided for the at least partial formation of the Bru outsweges in the transition region, whereby this is characterized by firmly defined path positions at which a support of the strip takes place. Due to the at least partial formation of the web travel path on two rollers, the guidance of the strip can be optimized during the transfer into the cable arrangement.
  • the single roller can be designed to be heated or unheated depending on the requirement and arrangement.
  • the rolls themselves may be rolls of treatment or other functional means of the device for producing and / or treating a web or, according to a second embodiment, separate rolls, ie rolls additionally provided for this case.
  • Conceivable is the formation of at least one roller of a drying cylinder. Furthermore, the at least one roller of the at least two rollers can be formed by a guide roller of a covering.
  • the advantage of the embodiments according to the first embodiment is the high functional concentration while avoiding additional components. These can be retrofitted with little modification effort in existing devices or implemented constructively with little effort by the intelligent use of already required components. The solution according to the invention is explained below with reference to figures. It details the following:
  • Figure 1 illustrates the basis of a section of a dryer section
  • FIG. 1 illustrates in a schematized and greatly simplified representation a detail from a drying section 1 for use in a device 2 for producing a material web, in particular fibrous web F in the form of a paper, board or tissue web, an application and an advantageous embodiment of a strip transfer system 3 for transferring a strip RS of this fibrous web F.
  • a coordinate system is applied to the dryer section 1.
  • the X direction describes the longitudinal direction of the device 2. This coincides with the fundamental direction of passage of the fibrous web F through them and is therefore also referred to as the machine direction MD.
  • the Y direction describes the direction perpendicular to the machine direction MD. This characterizes the width direction within the machine and is therefore also referred to as the cross-machine direction CD.
  • the Z direction describes the height direction.
  • the strip transfer system 3 is used in particular in fibrous webs F with high basis weight and / or long dryer sections use.
  • a strip RS of predefined width for example of about 20 cm, is cut in the lateral edge region of the fibrous web F and guided in the direction of passage to the subsequent position to be passed by the fibrous web F within the device 2. Subsequently, the strip RS is driven to full width and thus fibrous web width.
  • the drying section 1 comprises in the case shown a single-row drying arrangement 4 and one of these in the machine direction MD downstream two-row drying arrangement 5.
  • the single-row drying arrangement 4 comprises a plurality of drying cylinders T Z. n to T Z4 . n + i with n> 1, in the case shown by way of example T Z T .i to Z44.
  • the individual drying cylinders T Z n to T Z n + i are in the machine direction MD viewed one behind the other spaced from each other and preferably in the vertical direction free of offset from each other.
  • a suction device 7 is at least indirectly associated with a single deflection roller 6.
  • rollers 6 which can be sucked from outside are provided by way of example. These are in the vertical and horizontal direction to the Drying cylinders T Z. n and T Z4 . n + i staggered. The arrangement takes place in particular in a vertical direction offset to two successive to be passed in the direction of passage drying cylinders T Z .n and
  • the fibrous web F is supported on a fabric, in particular in the form of a dryer fabric belt 8, passed through the drying assembly 4.
  • the dryer fabric belt 8 wraps around the individual drying cylinder T Z. n to T n + i Z4 meandering manner, which is realized by the lead arranged between the drying cylinders return rollers. 6
  • the two-row drying arrangement 5 arranged downstream of the single-row drying arrangement 4 is characterized by a double-row arrangement of drying cylinders.
  • the individual rows 9 and 10 are arranged offset from each other in the vertical direction.
  • the arrangement of the drying cylinders T Z9.n to T Z g.n + i with n> 1 of the single row 9, here T Z9 .i to T Z9 . 3 and T Z i 0 n to T Z io. n + i with n> 1 of the row 10, here T Z io.i to T Z i 0 .3 takes place in the machine direction MD, each offset from one another.
  • the individual drying cylinders within the rows 9, 10 and the rows 9, 10 are arranged offset from each other and in the machine direction MD to each other.
  • the fibrous web F is alternately and meandering around the drying cylinder T Z9 . n to T Z9 . n + i, T Z io. n to T Z io. n + i each of the upper and lower rows 9, 10 passed through the drying assembly 5.
  • the guidance of the clothing between the individual drying cylinders T Z9 n to T Z9 n + i and T Z io.n to T Z io.n + i in the individual rows 9, 10 takes place via guide and guide rollers 13, 14, 24th
  • the fibrous web F is guided alternately along the outer circumference of the individual drying cylinders of the individual rows 9, 10, wherein in each case one fibrous web side with the surface of the individual drying cylinders T Z9 n to T Z9 n + i and T Z i 0 n to T Z i 0 n + i within each one single row 9, 10 comes into contact.
  • the respective other fibrous web side is supported by the dryer fabric belt 1 1 and 12, respectively.
  • a strip transfer system 3 For the transfer after the pulp web F has been torn off or the device 2 has been restarted, a strip transfer system 3 is provided. This serves to transfer a strip RS in the form of an edge strip between the individual components and functional devices of the dryer section 1. Within the individual drying arrangements 4 and 5, the transfer takes place with cable guide.
  • the strip transfer system 3 comprises at least a first transfer area 15 with a cable arrangement 35, not shown here in detail, and a second transfer area 16 with a cable arrangement 17 downstream of the first transfer area 15 via a transitional area 18, the transfer area 18 extending from a release area 19 of FIG first transfer region 15 for the strip RS extends to a clamping region 20 formed by the cable arrangement 17 of the second transfer region 16 for the strip RS and in the transition region 18 means 21 for guiding the strip RS and deflection from the web travel path are provided.
  • These include at least one suctionable band 28.
  • a blast table 29 may be provided.
  • the cable arrangement 17 like the cable arrangement 35, comprises two or more cables guided by rollers, which are brought together to form a rope cutter. Shown here are the rope 31 and the roller 30 arranged in the rope shears 17 before entry.
  • the rope arrangement 17 is arranged in the lateral direction of the device 2 in the cross machine direction CD.
  • the first transfer region 15 extends within the single-row dryer assembly 4.
  • the transition region 18 extends from the release region 19 at the last drying cylinder T Z4 . n of the single-row drying arrangement 4 up to the clamping area 20 of the cable arrangement 17, which is assigned to the double-row drying arrangement 5.
  • the in the leadership of the strip RS the length of the web travel path characterizing distance S between the release on the release area 19 at the end of the first transfer area 15 to the clamping area 20 of the strip RS in the cable arrangement 17 has a length> 1, 5 m.
  • the release area 19 is arranged on the last drying cylinder T Z44 of the single-row drying arrangement 4 and is characterized by the separation of the drying wire belt 8 from the web, in particular the strip RS.
  • the distance S is in this case by the wrapping region on the drying cylinder T Z4 defined by the strip RS free from the support by the drying wire belt 8, the wrapping region defined free of support by the drying wire belt 17 on a first roll in the direction of passage, here in the form of the first Drying cylinder T Z9 .i of the second drying arrangement 5 and the free path between the discharge area 22 from the drying cylinder T Z4 of the single-row drying arrangement 4 and the emergence area 23 on the drying cylinder T Z9 .i of the second drying arrangement 5 characterized.
  • the strip RS clamped between the ropes is in each case guided in meandering fashion alternately through the drying cylinders 10.1 to 10.3, 9.1 to 9.3 of the upper and lower rows 10, 9.
  • the arrangement of the transition region 18 takes place here in the region of the transition between the two drying arrangements 4, 5, i. in the area of dry group separation, whereby the web tension can be varied.
  • the release of the strip RS in the first transfer region 15 forming cable assembly 35 and guide to the clamping portion 20 of the cable assembly 17 can be realized over at least one free route.
  • this free route which is designated here by 25, a tee 26 is provided.
  • the knock-off device 26 is arranged downstream of the guide roller 24 in the web running direction.
  • the tee device 26 of the guide roller 24 is assigned directly.
  • the release area 19 nachlauf a web stabilization device 27.
  • This web stabilization device 27 is arranged in the transition region 18 from the detachment on the drying cylinder T Z4 .n to the guide roller 24.
  • a suctionable conveyor belt in particular a vacuum belt 28.
  • the vacuum belt 28 is directly upstream of the clamping region 20.
  • the arrangement is preferably horizontal above the machine floor.
  • the angle ⁇ characterizing the adjustment range is opposite to a plane spanned by the horizontal plane, i. MD / CD plane in both directions ranging from 0 ° to 15 ° inclusive.
  • the vacuum belt 28 may optionally be arranged pivotable.
  • the pivoting takes place at least between a functional position and a Park position. As a result, a trouble-free operation is ensured during operation when not needed strip transfer system 3.
  • the first drying cylinder which comes into contact with the upper side of the fibrous web F, may optionally be designed with a coating.
  • the transfer by means of rope and thus the formation of the cable assembly 17 is preferably carried out over a plurality of drying cylinders.
  • the length of the individual cable transfer system is a maximum of 130 m, preferably 40 m to 1 10 m are used.
  • the solution according to the invention allows here, due to the relatively large length of the web travel path from the drain on the drying cylinder T Z4 to the cable assembly 17, a gentle deflection in the cable plane. By means of this gentle deflection, a very good clamping quality of the strip between the individual ropes of the cable arrangement 17 can be realized.
  • the individual drying cylinders of the second drying arrangement 10 are preferably scraped. For this purpose, the drying cylinders 9. T Z T Z n to 9 .n + i
  • FIG. 2 illustrates, in a schematized and highly simplified illustration, a use case and a detail of a section from a drying section 1 for use in a device 2 for producing a material web advantageous embodiment of a strip transfer system 3 for transferring a strip RS of this fibrous web F between two double-row drying arrangements 5.1 and 5.2.
  • the basic structure of the individual double-row drying arrangement 5.1, 5.2 corresponds to that described in FIG. 1 for the double-row drying arrangement 5, for which reason the same reference numerals are used for the same elements.
  • the single double-row dryer arrangement 5.1, 5.2 is characterized by a double-row arrangement of drying cylinders.
  • the individual rows 9.1 and 10.1 or 9.2, 10.2 are arranged offset from one another in the vertical direction.
  • T Z9 . 2 n to T Z9 .2n + i with n> 1 of the single row 9.2, here T Z9 . 2 i, T Z9 .22 and T Z i 0 .2n to T Z i 0 .2n + i with n> 1 of the row 10.2 of the drying arrangement 5.2, here T Z i 0 .n
  • the fibrous web F is alternately and meandering around the drying cylinder T Z9 .in to T Z9 i. n + i, T Z i 0 .i n to T z io.m + i respectively of the lower and upper rows 9.1,
  • the individual drying cylinders T Z9 .in to T Z9 . i n + i with n> 1 of the single row 9.1, and T Z i 0 .i n to T Z i 0 .i n + i with n> 1 of the row 10.1, are each for this purpose of an endlessly circulating string in the form of a Strain belt 1 1 .1, 12.1 entwined.
  • the fibrous web F is alternately along the outer circumference of the individual drying cylinders of the individual rows 9.1, 10.1, wherein in each case one fibrous web side with the surface of the individual drying cylinders T Z9 .i n to T Z9 .i n + i and Tzio.m to T Z io. m + i within each of a single rows 9.1, 10.1 come into contact.
  • the respective other fibrous web side is supported by the dryer fabric belt 1 1 .1 or 12.1. This applies analogously to the guide through the drying arrangement 5.2.
  • the individual drying cylinders T Z9 is
  • T Z9 .2n + i with n> 1 of the single row 9.2 and T Z io.2n to T Z i 0 .2n + i with n> 1 of the row 10.2, are in each case of an endlessly circulating string in Form of a drying fabric belt 1 1 .2, 12.2 looped on a portion of its outer periphery.
  • the guidance of the covering between the individual drying cylinders T Z9 . 2 n to T Z9 .2n + i and T Z i 0 .2n to T Z i 0 .2n + i in the individual rows 9.2, 10.2 are in each case via guide and deflection rollers 13.2, 14.2.
  • the fibrous web F is alternately guided along the outer circumference of the individual drying cylinders of the individual rows 9.2, 10.2, wherein in each case one fibrous web side with the surface of the individual drying cylinder T Z9 .2n to T Z9 .2n + i and T Z i o.2n to T Z io.2n + i come in contact with each within a single row 9.2, 10.2.
  • the respective other fibrous web side is supported by the dryer fabric belt 1 1 .2 or 12.2.
  • a strip transfer system 3 is also provided here. This serves to transfer a strip RS in the form of an edge strip between the individual components and functional devices of the dryer section 1.
  • the strip transfer system 3 comprises at least a first transfer area 15 with a cable arrangement 35, not shown here in detail, and a second transfer area 16 with a cable arrangement 17 downstream of the first transfer area 15 via a transitional area 18, the transfer area 18 extending from a release area 19 of FIG first transfer region 15 for the strip RS extends up to a clamping region 20 formed by the cable arrangement 17 of the second transfer region 16 for the strip RS and in the transition region 18 means 21 for guiding the strip RS and deflection from the web travel path are provided.
  • These include at least one suctionable conveyor belt 28.
  • a blast table 29 may be provided.
  • the cable arrangement 17 like the cable arrangement 35, comprises two or more cables guided by rollers, which are brought together to form a rope cutter. Shown here are the rope 31 of the cable arrangement 17 and the roller 30 arranged in the cable shears 17 before entry.
  • the cable arrangement 17 is arranged in the transverse direction of the machine CD in the lateral edge area of the device 2.
  • the first transfer area 15 extends within the double-row dryer arrangement 5.1.
  • the transition region 18 extends from the release region 19 on the last drying cylinder T Z gi this to the clamping region 20 of the cable assembly 17, which is associated with the double-row drying assembly 5.2.
  • the path S characterizing the length of the web travel path between the release on the release region 19 at the end of the first transfer region 15 and the clamping region 20 of the strip RS in the cable arrangement 17 has a length of> 1.5 m.
  • the release area 19 is arranged on the last drying cylinder T Z in the drying arrangement 5.1.
  • the strip RS clamped between the ropes is in each case guided meander-shaped alternately on the drying cylinders of the upper and lower rows.
  • the introduction into the gap between the dryer fabric belt 1 1 .2 and in the web direction first drying cylinder of the drying assembly 5.2, in particular the drying cylinder Tz9.2i the lower row 9.2, by means of the cable assembly 17.
  • 2 i is formed by the guidance of the strip RS between the drying cylinder T Z io.in and the drying cylinder T Z9.2 i at least two rollers, here the drying cylinder Tzio.in and the guide roller 24.
  • an already existing guide roller 24 of the double-row drying arrangement 5.1 is used, which is to be displaced with respect to their arrangement in the transition region 18 between the drying arrangement 5.1, 5.2.
  • the guide roller 24 is in the illustrated case in the vertical direction between the drying cylinder Tzio.in the drying assembly 5.1 and the drying cylinder T Z9 . 2 i of the double-row drying arrangement 5.2 and thus viewed in the MD direction offset to both arranged between them.
  • the arrangement of the transition region 18 takes place in the region of the transition between the two drying arrangements 5.1, 5.2, i. in the area of dry group separation, whereby the web tension can be varied.
  • the release of the strip RS from the first transfer region 15 forming cable assembly 35 and guide to the clamping portion 20 of the cable assembly 17 can be realized over at least one free route.
  • this free route which is designated here by 25, a tee device 26 is provided for knocking off the material web.
  • the knock-off device 26 is arranged downstream of the guide roller 24 in the web running direction.
  • the tee device 26 of the guide roller 24 is assigned directly.
  • the release area 19 nachlauf a web stabilization device 27.
  • This web stabilization device 27 is arranged in the transition region 18 from the detachment on the drying cylinder T Z n to the guide roller 24.
  • a suctionable conveyor belt in particular a vacuum belt 28.
  • the vacuum belt 28 is the clamping area 20 immediately upstream.
  • the arrangement is preferably horizontal above the machine floor.
  • the angle ⁇ characterizing the adjustment range is in the range of 0 ° to 15 °, in comparison with a plane spanned on the horizontal plane, ie MD / CD plane in both directions.
  • the vacuum belt 28 may optionally be arranged pivotable.
  • the pivoting takes place at least between a functional position and a parking position. As a result, a trouble-free operation is ensured during operation when not needed strip transfer system 3.
  • the first drying cylinder which comes into contact with the upper side of the fibrous web F, may optionally be designed with a coating.
  • the respective transfer by means of rope and thus the formation of the cable assembly 17 is preferably carried out over a plurality of drying cylinders.
  • the length of the individual cable transfer system is a maximum of 130m, preferably 40m to 1 10 m are used.
  • the individual drying cylinders of the double-row drying arrangements 5.1 and 5.2 are preferably scraped.
  • the drying cylinders T Z 9.in to Tzg.i n + i, Tz9.2n to T Z are 9.2n + i and Tzio.m to T Z io.i n + i, T Z io.2n to Tzio.2n + i the individual rows 9.1, 9.2, 10.1, 10.2 each scraper 33.1, 33.2, 34.1, 34.2 assigned.
  • the solution according to the invention can be used for any type of transfer between cable arrangements 35 and 17. LIST OF REFERENCES

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Abstract

L'invention concerne une section de séchage d'une machine pour fabriquer et/ou traiter une feuille continue de matériau, en particulier une feuille continue de matière fibreuse (F), pourvue d'un système de transfert (3) pour transférer une bande (RS) de la feuille continue de matériau, comprenant au moins une première zone de transfert (15) dotée d'un agencement de câbles (35) et une deuxième zone de transfert (16) dotée d'un agencement de câbles (17) et disposée en aval de la première zone de transfert (15) au-dessus d'une zone de transition (18), la zone de transition (18) s'étendant d'une zone de libération (19) de la première zone de transfert (15) pour la bande (RS) jusqu'à une zone de serrage (20) formée par l'agencement de câbles (17) de la deuxième zone de transfert (16) pour la bande (RS). L'invention est caractérisée en ce que des moyens (21) destinés à guider la bande (RS) sont disposés dans la zone de transition (18) entre les deux zones de transfert (15, 16), ces moyens comprenant une bande transporteuse pouvant être soumise à une aspiration, en particulier une bande à vide (28), inclinée à un angle de l'ordre de 0° à 20° inclus, de préférence de 0° à 15°, par rapport à un plan horizontal, et disposée directement avant la zone de serrage (20).
PCT/EP2012/073288 2011-12-22 2012-11-22 Section de séchage WO2013092093A1 (fr)

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DE102011089508.6 2011-12-22
DE201110089508 DE102011089508A1 (de) 2011-12-22 2011-12-22 Trockenpartie

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AT520825B1 (de) * 2018-10-18 2019-08-15 Andritz Ag Maschf Vorrichtung und Verfahren zum Überführen eines Streifens einer Bahn
DE102020119892A1 (de) 2020-07-28 2022-02-03 Voith Patent Gmbh Maschine und Verfahren zur Herstellung einer Faserstoffbahn

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DE4124648A1 (de) * 1991-07-25 1993-01-28 Escher Wyss Gmbh Einrichtung zur verbindung zweier trockengruppen einer papiermaschine
EP1076131A2 (fr) * 1999-08-10 2001-02-14 Voith Paper Patent GmbH Convoyeur à vide
WO2004042145A1 (fr) * 2002-11-04 2004-05-21 Metso Paper, Inc. Agencement de finissage direct sur machine a papier
WO2012084380A1 (fr) * 2010-12-23 2012-06-28 Voith Patent Gmbh Dispositif pour fabriquer et/ou traiter des feuilles continues de matériau

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DE4124648A1 (de) * 1991-07-25 1993-01-28 Escher Wyss Gmbh Einrichtung zur verbindung zweier trockengruppen einer papiermaschine
EP1076131A2 (fr) * 1999-08-10 2001-02-14 Voith Paper Patent GmbH Convoyeur à vide
WO2004042145A1 (fr) * 2002-11-04 2004-05-21 Metso Paper, Inc. Agencement de finissage direct sur machine a papier
WO2012084380A1 (fr) * 2010-12-23 2012-06-28 Voith Patent Gmbh Dispositif pour fabriquer et/ou traiter des feuilles continues de matériau

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Title
PETER HAIDER: "twogether", vol. 4/07, VOITH SULZER PAPIERTECHNIK GMBH, article "Bahn- und Streifenüberführung in Karton- und Verpackungsmaschinen", pages: 41 - 48

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