Classifications

• • 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
• • 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
  • D21F5/02—Drying on cylinders
  • D21F5/04—Drying on cylinders on two or more drying cylinders

Definitions

• the invention relates to a method for transferring a material web, in particular a fibrous web in the form of a paper, board or tissue web of a dry assembly of a machine for producing such a material web, in which the material web supported on an endlessly circulating dry belt alternating over a plurality of heated drying cylinders under direct contact with their surface and arranged therebetween deflecting rollers is guided to a downstream of the drying assembly, in which after transferring a AufzhoustMails of the dry assembly to the downstream functional unit, the material web is driven to the desired width.
• the invention further relates to a drying device of a machine for producing a material web, in particular fibrous web in the form of a paper, board or tissue web with at least two drying arrangements and a downstream in the direction of travel of the web of the last drying arrangement transfer device for transferring the web to a downstream of the drying assembly functional unit , wherein at least the last drying arrangement in the direction of passage comprises a plurality of heated drying cylinders and guide rollers arranged therebetween, a roller arranged downstream of the last drying cylinder in the direction of rotation of the drying belt, and a drying belt for alternately guiding the material web over the drying cylinders and guide rollers.
• series connections of single-row dry arrangements are used for drying respectively different web sides.
• the invention had the object of further improving a method for transferring a material web, in particular to ensure the transfer process even safer and more stable.
• the solution according to the invention is characterized by the features of claims 1 and 10.
• Advantageous embodiments are described in the dependent claims, which can be used individually or in combination with each other with the features of the independent claims in an advantageous manner.
• An inventive method for transferring a material web, in particular a fibrous web in the form of a paper, board or tissue web of a drying arrangement of a machine for producing such a material web in which the material web supported on an endlessly circulating dry belt alternating over a plurality of heated drying cylinders in direct contact with their surface and in between arranged deflection rollers is guided to a downstream of the drying assembly functional unit, in which after transferring a AufzhoustMails of the drying assembly to the downstream functional unit, the material web is driven to the desired width, characterized in that the AufzhoustMail after the last drying cylinder of the drying arrangement supported by the dry belt is guided into the Umschlingungs Scheme of the dry belt with a last drying cylinder downstream besaugbaren roller, removed in a decrease range within the Umschlingungs Kunststoffes from the drying belt and transferred to the downstream functional unit.
• a leader strip is understood to mean a strip of a material web whose extent in the width direction is characterized by a substantially smaller width than in the longitudinal direction.
• the width of the Aufzhoustsammlungs can vary in the longitudinal direction, in particular be characterized by a steady change or kept constant over a predefined length range.
• Such Aufzhoustsammlung are usually formed by so-called edge strips, which are generated in the lateral end portions of the web by cutting them with further formation of a residual web.
• the term dry belt comprises at least one endless, ie present as a loop band in various designs, which is guided over guide rollers and driven by at least one drivable roller. By the drive this runs around.
• the dry belt is preferably a dryer fabric. The direction of rotation of the drying belt coincides in the support region for the material web with the direction of passage of the material web through the drying arrangement.
• the acceptance region describes an area at which the material web, in particular the leader strip, is removed from the drying belt. In an idealized form, this can be described by a take-off line.
• Subordinate functional units are assemblies, assemblies, and
• Devices and devices that serve the further guidance and / or treatment of the material web or material web components may be, for example, one of the following functional units: another
• Dry arrangement a retractor for the material web, a
• the inventive solution allows the support on the dry belt, the safe transfer of a Auf KunststoffstMails of dry arrangements to downstream functional units, in which a decrease in the
• the inclination angle can be in the range of 70 ° to 1 10 °.
• the solution according to the invention is also suitable for transferring from inverted single-row drying arrangements, i. arranged in series drying cylinders with guide rollers arranged therebetween, whose
• Drying cylinders are arranged.
• the main advantages of the suctionable roller are the possibility of a controlled web run in the pulper, ensuring a defined picking position during transfer and a considerably improved
• the suctionable roll is arranged in such a way that, in the installed position, it is at least over a partial area of the outer circumference above a longitudinal axis of the suctionable roll and perpendicular to it in a horizontal plane
• Characterized level is wrapped by the dry belt.
• Acceptance range is thereby based on a laid by the longitudinal axis of the suctionable roller coordinate system in the first or fourth
• the threading strip is held in the area between a discharge line of the drying belt from the drying cylinder and the suctionable roll by applying a negative pressure to the drying belt. This measure allows a safe guidance of the leader strip in a fixed position relative to the dry belt to the removal area.
• the flow line of the drying belt and when guiding web components, in particular the Aufzhoustsammlungs or the entire web at this from the last drying cylinder describes the local course of detachment of the dry belt or of material web components from
• Outer circumference of the drying cylinder in the cross machine direction and can be characterized in an idealized form by a parallel to the longitudinal axis of the drying cylinder.
• a negative pressure in the range of 10 Pa to 2000 Pa, preferably 20 Pa to 1000 Pa, more preferably 25 Pa to 500 Pa, for example 30 Pa to 50 Pa is applied to the dry belt in the wrap of the dry belt with the besaugbaren roller.
• the negative pressure allows the exact positioning of the AufzhoustMails when removing.
• the provision of the provided for the transfer guide strip can be done in various ways.
• the material web can do this in a first
• the first basic version includes a multitude of sub-variants, which are individually considered to be particularly suitable for certain applications.
• the subdivision of the material web is preceded by a first drying cylinder of the drying arrangement.
• the separation may be on the dry belt or supported on another movable surface.
• the separation can be done, for example, in a vertical arrangement of the drying cylinder on the top in the installed position deflection roller.
• the separating position between the first and last drying cylinder of the drying arrangement is arranged.
• the second basic embodiment of the separation of the AufzhoustAINs only after the last in the direction of passage of the web or the direction of rotation of the drying belt drying cylinder offers the advantage of a short Transfer path for the strip to the take-off area on the suctionable roller. Measures on the drying belt for fixing the
• Drying belt in the region between the drain of the drying cylinder and besaugbarer roller and / or the expiration of the drying belt on the besaugbaren roller downstream according to at least one of the following
• the drying device of a machine for producing a material web in particular fibrous web in the form of a paper, board or tissue web with at least two drying arrangements and one in
• Subordinate transfer device for transferring the material web to a downstream functional unit, wherein at least the in Passing direction last drying arrangement comprises a plurality of drying cylinders and deflection rollers arranged therebetween, a roller arranged downstream of the last drying cylinder in the direction of rotation of the drying belt, and a drying belt for alternately guiding the material web over the drying cylinders and deflection rollers.
• the last drying cylinder downstream roller is designed as besaugbare roller and the
• Transfer device comprises a removal device for a AufzhoustMail, which is arranged opposite to the suctionable roller, to be suitable to be effective in a removal region in the wrap area of the dry belt with the suctionable roller on the leader.
• the besaugbare roller is arranged for the desired guidance of the AufzhoustMails and decrease in this such that these in the installed position at least over a portion of the outer periphery above a through the longitudinal axis of the besaugbaren roller and a perpendicular to this in a
• Umschlingungs Buffaloingungs
• the dry belt with the besaugbaren roller at least in the region of the removal area, preferably in the entire
• the suction region has at least one zone extending over the removal region of the leader strip.
• the suction region of the suctionable roller has a further zone extending over the extension of the suctionable roller in the direction parallel to the longitudinal axis, which serves to support the Residual web or a completely listed material web when guided in a arranged below the drying arrangement collecting device is used.
• the two zones are separated from each other for the realization of different functions and / or switched off.
• the transfer device comprises a blowing device for releasing a threading strip in the removal region on the dry belt.
• the transfer takes place without ropes and precisely.
• the transfer device has one of the blowing device for releasing a transfer strip in the removal area on the dry belt
• downstream transfer device in particular one or more parts
• the discharge line of the drying belt from the drying cylinder comprises the
• Transfer device preferably a the dry belt between the discharge line on the drying cylinder and besaugbarer roller associated device for
• the device is in a simple way the AufzhoustMail on the dry belt at transfer into the
• the means for generating a negative pressure associated with the drying belt between the discharge line on the drying cylinder and the suctionable roll has at least one zone extending over the theoretical width of the threading strip and another extending parallel to the extension of the suctionable roll Longitudinal axis extending zone, which are separated from each other and / or can be switched off.
• Performance strip also serve to stabilize the residual track.
• arranged device is an energetically favorable mode of operation adapted to the specific mode of operation possible because not always vacuum must be provided over the entire machine width.
• the transfer device comprises a drying belt of the flow line of the drying belt on the suctionable roller downstream associated device for
• the suctionable roller has a diameter of> 700 mm, preferably in the range between 1200 mm and 1500 mm inclusive.
• the besaugbare roller at a distance to the downstream functional unit, in particular next guide roll in the machine direction in the range between 3000 mm and 1500 mm, preferably 3000 mm and 2500 mm.
• a separating device for dividing the material web is provided in a Auf waxstMail and a residual web. This can be designed in various ways and be associated with the dry belt or a, the material web supporting the movable surface.
• Cutting devices in the form of air or water jet cutting devices.
• the arrangement can be carried out upstream of the last drying cylinder of the drying arrangement, depending on the design and construction of the drying arrangement in a first basic design.
• this upstream guide roller is an on the drying belt on the clippings via the dry belt on
• the separator is in a further sub-variant of the first
• the separating device is the end of the drying belt from the last drying cylinder of the drying arrangement
• a cleaning device is preferably associated with the respective roller. This is designed to be suitable to clean the respective roller by means of air and / or a fluid, in particular water or a mixture.
• the drying device is preferably designed and constructed such that at least a portion of the drying cylinders in the end of the last
• Dry arrangement are arranged offset from each other in the vertical direction, wherein the longitudinal axes are arranged free of offset in the machine direction to each other or offset in the machine direction to form a relative to a vertical plane inclined running dry arrangement. This design allows easy and quick removal of waste.
• Dry arrangement designed as an inverted single-row drying arrangement.
• the drying cylinders in the end region of the drying arrangement are arranged in the machine direction in a spaced row and the longitudinal axes of the
• FIG. 1 illustrates a first embodiment of a drying arrangement
• FIG. 2 illustrates, on the basis of a signal flow diagram, the transfer of the
• FIG. 3 shows a development of the embodiment according to FIG.
• FIG. 4 illustrates, on the basis of a signal flow diagram, the transfer of the
• FIG. 5 shows a schematic diagram of an arrangement
• Figure 6 illustrates different arrangement options
• Figures 7a and 7b show a possible subdivision of the suction region of the suctionable roller in the circumferential direction and transversely thereto;
• FIG. 8 illustrates the possibility of controllability of the individual
• FIG. 9 illustrates a subdivided embodiment of a transfer belt
• FIG. 12 shows a possible arrangement of the transfer device in one
• FIG. 13 illustrates, by way of example, possible arrangements of the dry arrangement in a machine for producing a material web.
• FIG. 1 illustrates, in a schematized and greatly simplified illustration, a detail of a drying arrangement 1 for use in machines for producing a material web, in particular fibrous web F in the form of a paper, board or tissue web, the arrangement according to the invention and
• the X-axis describes the longitudinal direction of the extension of the machine and is therefore also referred to as the machine direction MD. This corresponds to the direction of passage of the material web through the machine for producing these.
• the Y direction describes the direction transverse to the machine direction and is therefore also referred to as the CD direction CD
• the Z direction corresponds to the height direction.
• the drying arrangement 1 comprises at least one, preferably a plurality of drying cylinders TZ1 to TZn, which are shown by way of example in the feedthrough direction of the fibrous web F of both last drying cylinders TZn and TZn-1.
• the fibrous web F is in the operation of the drying assembly 1 by an endlessly circulating dry belt 3 in the form of an air-permeable dryer in the illustrated area of the dry assembly 1 meandering alternately over the drying cylinder TZ1 to TZn and arranged therebetween guide rollers 5 passed through the drying arrangement.
• the guide is always supported here on the dry belt 3.
• a re-launch of the fibrous web F is required.
• a FriedzhoustMail AS is transferred to the downstream functional unit 4 and after the transfer, the fibrous web driven to its desired width.
• the transfer of a FriedzhoustMails AS of the fibrous web F on the following functional unit 4 is not carried out by the direct decrease in the drying cylinder, in particular the drying cylinder TZn but decrease in the dry belt 3 and transfer to a downstream functional unit 4 from Drying belt 3.
• the Aufzhoust Shape AS is performed after the last drying cylinder TZn supported on the dry belt 3, ie after the discharge line AL of the drying belt 3 from the drying cylinder TZn supported on this.
• the last in the guide direction of the fibrous web F drying cylinder TZ a guide roller for the dry belt 3 in the form of a besaugbaren roller 6 is arranged, which is arranged such that these viewed in the installation position at least over a portion of its outer periphery 7 above a plane E, through the longitudinal or rotation axis R of the suctionable roller 6 and a vertical in the horizontal plane or machine direction MD is characterized, is wrapped by the dry belt 3.
• the suctionable roller 6 must be wrapped in the region of its upper half in the installed position over at least a portion of its outer periphery 7 of the dry belt 3.
• the decrease of the AufzhoustMails AS is then the discharge line AL of the dry belt 3 on the drying cylinder TZn downstream and before or in the region of a theoretical line which is characterized by the intersection of the plane E and the dry belt 3 on the besaugbaren roller 6.
• the transfer device 2 comprises a removal device 8, which may be designed in various ways. This is assigned to the drying belt 3 in the removal area AB.
• a take-off device 8 suction and / or blowing devices are used, which transfer the Aufzhoust Shape AS directly or indirectly via further transfer devices, for example in the form of a conveyor belt 9 to the next functional unit 4.
• the conveyor belt 9 is preferably designed as a vacuum belt. The design can be one or more parts.
• the drying arrangement 1 is designed in such a way that, in the region upstream of the functional unit 4, it is suitable to dry only one side of the fibrous web F by contact drying. That is to say that this area is single-row, wherein the arrangement of the drying cylinders TZ1 to TZn can vary.
• Figure 1 shows a section of a substantially vertical arrangement of the individual Drying cylinder TZn-1 to TZn related to the installation position.
• the longitudinal axes L T z n -i to ⁇ _ ⁇ of the individual drying cylinders TZn-1 to TZn extending in the installation position in the cross-machine direction CD are arranged parallel to one another and offset from one another in the vertical direction.
• the fibrous web F is guided under direct contact with the lateral surface 10.1 to 10.n of the individual drying cylinders TZn-1 to TZn, each over a partial area of the outer circumference thereof.
• the guide rollers 5 are arranged between two adjacent in the direction of rotation of the drying belt 3 drying cylinders TZn, TZn-1, ie their longitudinal axes are to those the drying cylinder arranged offset in the vertical and horizontal directions.
• the guide rollers 5 are preferably designed as besaugbare guide rollers.
• the suction can be done either directly over the interior of the guide rollers 1 1 1 or indirectly via the outer circumference 12 of the guide rollers 5 arranged suction boxes.
• the deflection rollers 5 are arranged inside the drying belt 3, ie contact the inner side 14 of the drying belt 3 during the at least partial wrapping around it.
• the drying cylinders TZn-1 and TZn are arranged outside the loop formed by the drying belt 3 and contact a part of their area when not in operation During operation of the drying arrangement 1, the drying belt 3 presses the fibrous web F against the surface of the jacket 10.n-1, 10.n of the respective drying cylinder TZn-1 , TZn from formed surface and thus improves the heat transfer to the fibrous web F.
• the fibrous web F is guided on the outer side 15 of the drying belt 3. During the wrapping of the guide rollers 5, the fibrous web F is then at this outside, ie the surface of the guide rollers 5 contacted directly the dry belt 3.
• the jacket of the individual Guide roller 5 is preferably carried out in the illustrated embodiment with a perforation and the interior 1 1 connected to a vacuum source, not shown in detail. To stabilize the web run are located in the pockets between the drying cylinders TZn-1 and TZn and the guide rollers 5 sod boxes 13, on the negative pressure of the fibrous web F between drying cylinder TZn-1 and guide roller 5 is sucked to the drying belt 3.
• the guide is supported on the dry belt 3 and can be safely ensured by applying the dry belt 3 on the side leading away from the leader AS side with a negative pressure, for example via a device 16.
• the decrease of the dry belt 3 takes place in a particularly advantageous manner on the suctionable roller 6 in the wrap of the dry belt 3 with this, in particular a region of the outer periphery 7 of the suctionable roller 6 above the plane formed by the axis of rotation R and a perpendicular to this in the MD direction E.
• the removal area AB is characterized by the detachment of the AufriostMails AS from the dry belt 3. This can be described in the ideal case by a running in the cross machine direction CD line.
• the removal area AB is in the installation position of the suctionable roller 6 shown in Figure 1 within the 4th squares of these in the view of this in the MD / Z plane of the machine relative to a through the longitudinal axis of besaugbaren roller 6 laid, not shown here coordinate system or relative to the plane E in an angular range between 0 ° and 180 °, preferably 0 ° and 90 °.
• the besaugbare roller 6 is preferably designed with a diameter> 700mm, preferably in the range between 1200 mm to 1500 mm.
• the arrangement of the suctionable roller 6 with respect to the following functional unit 4 is preferably characterized by the following dimensional ranges:
• FIG. 4 illustrates the individual method steps.
• the fibrous web F is discharged in a region upstream of the source of interference into a collecting device, in particular a pulper and a new track of the fibrous web.
• a AufzhoustMail AS ' Since the fibrous web F is usually not transferred in full width between the individual functional units of the machine, a TarzhoustMail AS ' , preferably generated in the form of a marginal strip, which is guided by the individual successively arranged functional units of the machine until the fibrous web on again their full width can be driven. If such a AufzhoustMail AS ' in a drying arrangement 1 with a last drying cylinder TZn in the manner described below besaugbaren roller 6 for guiding the dry belt 3, this is not necessarily transferred immediately to the following functional unit 4, but in a below de drying arrangement. 1 arranged catcher, in particular a pulper 18 performed according to step V01. The guide is preferably ropeless.
• the region between the last drying cylinder TZn and the suctionable roller 6 and preferably also the area between the suctionable roller and the drying belt 3 after the suctionable roller 6 leading guide roller 19 with a negative pressure, preferably a vacuum can be acted upon.
• the application can be realized by means arranged on the inside 14 of the drying belt 3 and the suctionable roller 6 downstream device 21 for applying a negative pressure.
• the guide roller 19 is disposed below the suctionable roller 6. Their longitudinal axes spaced apart from one another in the vertical direction can be arranged in alignment in the vertical direction, ie, free from misalignment in the MD direction.
• the guide roller 19 preferably has a smaller diameter than the suctionable roller 6, so that the drying belt 3 is guided at an angle with respect to the vertical direction between the suctionable roller 6 and guide roller 19, to allow easy removal of the Auf manufacturedstMails AS ' in the pulper 18 .
• the devices 16 and 21 may also be of one unit be formed. In order to be able to use a negative pressure, in particular the vacuum, specifically at the required areas free from impairment of adjacent areas in the drying arrangement 1, said area is preferably sealed off from the environment surrounding it, for example by means of a corresponding cover plate 20.
• the fibrous web is moved as fibrous web F ' in step V02 to the desired width.
• the wide-traveling or end-to-end wide-spread fibrous web F ' is also guided on the drying belt 3 to the pulper 18 in step V03 out.
• the fibrous web F ' is acted upon by the negative pressure of the device 16 and the suctionable roller 6 to remain on the drying belt 3 until the expiration of the besaugbaren roller 6 and this downstream in the region between the besaugbaren roller 6 and the guide roller 19.
• the actual AufgarstMail AS is generated by the wide-traveled fibrous web F 'is divided into a Auf woolstMail AS and a residual web RS in V04.
• the residual web RS is guided into the pulper - V05 and the Aufzhoustsammlung AS according to VA transferred to VC in Figure 2 to the downstream functional unit 4 and the fibrous web F driven to desired width.
• the wide-traveled fibrous web F is then no longer guided in VD to the removal area AB on the besaugbaren roller 6 but raises according to the imaginary line connecting the downstream functional unit, for example, the transfer belt 9 earlier from the dry belt 3.
• This area is designated by 24 and is preferably within the Umschlingungs Schemees of the dry belt 3 with the besaugbaren roller 6 in front of the removal area AB for the AufzhoustMail AS.
• the transferred wide-traveled fibrous web F is shown by dash-dotted line.
• a separator 17 is provided which is a subdivision of Fibrous web F ' within the dryer assembly 1 in a residual web RS and the auf structuriden, ie the functional unit 4 to be supplied AufzhoustMail AS allows.
• the subdivision takes place in front of the last in the direction of rotation of the dry belt 3 and direction of passage of the fibrous web F drying cylinder TZn, in particular between guide roller 5 and drying cylinder TZn.
• the separating device 17 can be designed in various ways. Conceivable are concepts with cutting media in the form of a fluid, such as a double-head water jet tip cutter as well as a solid, such as a cutting blade. Depending on the design and the position, the width of the threading strip as well as the position of the threading strip in the CD direction can be varied. In particular, in embodiments of the separating device as a double-head cutting device, there is the possibility of an independent influence on the position in the cross-machine direction and the width of the AufzhoustMails.
• FIG. 3 illustrates an advantageous arrangement of the separating device 17.
• the subdivision is effected by separating the fibrous web F ' on the dry belt 3.
• the separating device 17 is assigned to the outside of the dry belt 3 for this purpose. If the subdivision into thread strips AS and residual web RS takes place before the last drying cylinder TZ, if an air knife is provided in the region of the suction box 13 on the outside 15 of the drying belt 3, the cut material can be discharged through the drying belt 3.
• FIG. 5 shows, in a view of the fibrous web F ', the arrangement of the separating device 17 and its mode of operation for subdivision into the threading strips AS and the residual web RS.
• the direction of movement of the fibrous web F ' is indicated by an arrow, likewise the directions of movement of the leader strip AS and the residual web RS.
• the separating device 17 corresponds to a carrier 25 extending in the cross-machine direction CD slidably mounted by the double arrow.
• the width of the AufzhoustMails AS can be varied in a simply cutting device. If this is designed as a double cutter, in addition to the width, the position of the AufzhoustMails AS can be varied in the cross machine direction CD.
• the setting can be made manually or automatically, for example by means of a corresponding control device 23, which activates an adjusting device of the separating device 17 as a function of a variable which at least indirectly characterizes the width of the threading strip AS and / or the position in the cross-machine direction CD.
• FIG. 6 shows, on the basis of a detail from a drying arrangement 1 according to FIG. 3, further possibilities of arranging the separating device 17, which can alternatively be used.
• the individual arrangements are designated 17.1 to 17.3.
• a vertical arrangement of the drying arrangement 1 is shown with a plurality of drying cylinders TZn, TZn-1, TZn-2 and TZn-3. All drying cylinders are arranged in the vertical direction with respect to their longitudinal axes free of misalignment in the MD direction.
• Another first possible arrangement of the separating device 17.1 is characterized by an arrangement after the end of the drying belt 3 from the last drying cylinder TZn in the direction of rotation of the drying belt 3.
• the fibrous web F ' to be subdivided is removed in this case with the drying belt 3 from the last drying cylinder TZn and subdivided downstream of the outflow AL into feeding strips AS and residual web RS, the division taking place before the suctionable roll 6.
• the cut is not influenced by the drying cylinders.
• the separating device 17.1 can also be arranged directly on the suctionable roller 6. In this case, it is advantageous to provide a cleaning of the perforation of the roller 6, which can be carried out, for example, as air and / or fluid cleaning, in particular water purification.
• Another second possible arrangement of the separating device 17.2 is characterized by an arrangement at the beginning or in front of the drying arrangement 1, in particular the drying cylinder TZn-3 or the upstream deflection roller 5. This arrangement provides sufficient space for the arrangement of the separator 17.2.
• the third possible arrangement of the separating device 17.3 is characterized by an arrangement within the drying arrangement 1 and upstream in the direction of rotation of the drying belt 3 last drying cylinder TZn.
• the suction region 22 is preferably designed over the extent of the roller 6 in the cross-machine direction CD.
• the vacuum applied via the suction zone 22 can be infinitely or stepwise adjustable in the CD transverse direction CD.
• an embodiment of the suction region 22 in the cross-machine direction CD with a plurality of zones 22A to 22D is shown schematically in a simplified representation in a development in FIG. 7a.
• the individual zones can be controlled individually or in groups or jointly.
• at least one of the zones, for example, the zone 22A is designed such that it corresponds to the width of the Auf manufacturedstMails AS. Other subdivisions are conceivable.
• the remaining suction zones are arranged in the cross-machine direction and preferably extend over the entire width of a residual web RS theoretically to be acted upon by these.
• the individual zones can, viewed in the cross-machine direction CD in the installation position of the roller 6, vary in terms of their extent in the width direction.
• the aforementioned embodiments for the suction region 22 also apply to the devices 16 and / or 21 for applying a negative pressure to the drying belt 3. These also can be switched on and switched off. Furthermore, these can be subdivided in the cross-machine direction CD and / or along the guide path of the drying belt 3 into zones which can be controlled individually and / or in groups or jointly.
• the control can for example also take place via a control device 23.
• the respective control device 23 may be a control device assigned to the respective functional group. Also conceivable is a control unit centrally assigned to a functional unit or to several or to the entire machine.
• FIG. 9 illustrates by way of example the design of the conveyor belt 9 in a divided form, in particular in a two-part design.
• FIGS. 10 and 11 show further possible embodiments of the guide region of the drying belt 3 up to the removal region AB. These designs are characterized by a short guide path.
• Figure 10 shows an embodiment in which the suctionable roller 6 has been moved with its axis of rotation R in the region of a vertical through the longitudinal axes L JZn of the drying cylinder TZn. This shortens the guide path for the dry belt 3 to the removal area AB.
• this embodiment does not allow arrangement of the separating device 17 downstream of the drying cylinder TZn, but can dispense with a device 16 for supporting the leadership of Aufzhoust Shapes AS on the dry belt 3 between drain AL from the drying cylinder TZn and removal area AB on the suctionable roller 6.
• FIG. 1 Another possible embodiment is shown in Figure 1 1.
• the suctionable roller is arranged such that the suction region 22 of the suctionable roller 6 directly adjoins the discharge line AL.
• This arrangement is particularly suitable for embodiments in which the Aufzhoust Shape AS is created before the last in the direction of passage drying cylinder TZn the drying assembly 1.
• FIG. 12 shows a possibility of using a method according to the invention and a transfer device 2 according to the above-described embodiment and mode of operation in an inverted drying arrangement 1.
• This comprises a plurality of spaced apart in series drying cylinders TZn, TZn-1 and arranged therebetween deflection rollers 5, wherein the guide rollers 5 and the downstream in the direction of rotation of the drying belt 3 and thus the direction of passage of the fibrous web F downstream besaugbare roller 6 in contrast to the previously described installation position in terms of her Longitudinal axes above the longitudinal axes L TZn and L T z n -i are arranged.
• the transfer process in particular the AufgarstMails AS takes place in analogy to the procedure described in Figures 1 to 1 1.
• the same reference numerals are used and with respect to the transfer operation, reference is made to the previous statements.
• FIG. 13 shows, in a schematically simplified representation, with reference to the exemplary construction of a machine 26 for producing a material web, possible arrangements of the dry arrangement 1 according to the invention with downstream transfer device 2.
• the machine 26 comprises a former 27 and press section 28 with a subsequent drying device, which is arranged in a 29 and after-drying device 30 is divided, and a reel 31.
• a smoothing device 32 and an applicator 33 for applying glue, starch and / or coating color is arranged.
• the drying device according to the invention can be used both in the pre-29 as well as in the after-drying device 30.
• the arrangement in the pre-drying device 29 has the advantage that the influence of the particular single-sided application on the curl of the fibrous web 1 can be at least partially compensated.

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• Treatment Of Fiber Materials (AREA)

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• 2011
  • 2011-11-25 DE DE201110087095 patent/DE102011087095A1/de not_active Withdrawn
• 2012
  • 2012-11-14 WO PCT/EP2012/072552 patent/WO2013075988A1/de active Application Filing
  • 2012-11-14 CN CN201280066846.4A patent/CN104204349A/zh active Pending
  • 2012-11-14 EP EP12797755.1A patent/EP2783040A1/de not_active Withdrawn

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