WO2024008405A2 - Machine et procédé - Google Patents

Machine et procédé Download PDF

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Publication number
WO2024008405A2
WO2024008405A2 PCT/EP2023/065884 EP2023065884W WO2024008405A2 WO 2024008405 A2 WO2024008405 A2 WO 2024008405A2 EP 2023065884 W EP2023065884 W EP 2023065884W WO 2024008405 A2 WO2024008405 A2 WO 2024008405A2
Authority
WO
WIPO (PCT)
Prior art keywords
marking
roller
machine
loop
changing unit
Prior art date
Application number
PCT/EP2023/065884
Other languages
German (de)
English (en)
Other versions
WO2024008405A3 (fr
Inventor
Hermann Sorg
Tobias Kolhagen
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
Priority claimed from DE102022119887.1A external-priority patent/DE102022119887A1/de
Application filed by Voith Patent Gmbh filed Critical Voith Patent Gmbh
Publication of WO2024008405A2 publication Critical patent/WO2024008405A2/fr
Publication of WO2024008405A3 publication Critical patent/WO2024008405A3/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
    • D21F5/18—Drying webs by hot air
    • D21F5/181—Drying webs by hot air on Yankee cylinder
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/02—Rolls; Their bearings
    • D21G1/0206—Controlled deflection rolls
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/02—Rolls; Their bearings
    • D21G1/0206—Controlled deflection rolls
    • D21G1/0213—Controlled deflection rolls with deflection compensation means acting between the roller shell and its supporting member

Definitions

  • the invention relates to a machine for the production or processing of a fibrous web, in particular for the production of machine-smooth paper (MG paper), and to a method for changing a covering of a machine for the production or processing of a fibrous web.
  • MG paper machine-smooth paper
  • the object of the invention is to propose a machine with which special papers can be reliably produced even with large machine widths.
  • the present invention further sets itself the task of designing the machine in such a way that a wide covering - e.g. a marking felt with a width of up to 9m must be able to be pressed onto the paper web on the MG cylinder (on/off) and the felt change times must be as short as possible.
  • a wide covering e.g. a marking felt with a width of up to 9m must be able to be pressed onto the paper web on the MG cylinder (on/off) and the felt change times must be as short as possible.
  • a machine for producing or processing a fibrous web comprising a Yankee cylinder Drying and/or smoothing of the fibrous web, as well as a transfer roller, which can be placed on the Yankee cylinder to form a transfer nip.
  • the machine comprises a marking roller, which can be placed on the Yankee cylinder to form a marking nip, the marking nip being arranged after the transfer nip when viewed in the running direction of the fibrous web.
  • the machine also has a covering, in particular a marking felt, whereby the covering is arranged in the form of a covering loop around the marking roller and is guided through the marking nip.
  • the marking roller and preferably also the transfer roller is or are designed as a deflection compensation roller.
  • the fibrous web is a paper web, for example an MG paper web.
  • covering and felt or marking felt are used synonymously in the context of this application, since the marking felt is by far the most common application in connection with the marking roller. However, it is possible that a fabric, film or other suitable covering can be used instead of a marking felt.
  • Yankee cylinders for use in this invention can, for example, be cast cylinders.
  • the use of Yankee cylinders with a steel jacket is also very advantageous.
  • the Yankee cylinders are usually supplied with hot steam from the inside that is under a certain pressure. This leads to a deformation of the Yankee cylinder.
  • the cylinder is, as it were, inflated. This effect is particularly significant on the driver-side and drive-side edges of the Yankee cylinder. While the jacket is strongly deformed outwards, the front covers remain largely unchanged. Therefore, the surface of the Yankee has a strong gradient in this edge region.
  • deflection compensation roller in combination with the Yankee cylinder Insert transfer roller.
  • deflection compensation rollers make it possible to specifically adjust the profile of the marking nip across the width, and thus also the profile of the contact pressure.
  • Deflection compensation rolls are also referred to as bending compensation rolls. The applicant ring sells such rollers under the brand name NipCo Rollers.
  • the transfer of the fibrous web to the Yankee cylinder expediently takes place in the area of such a bending compensation roller applied to the Yankee cylinder. This means that even pressure and a stable transfer of the web to the Yankee cylinder can be achieved, especially in the area of the edges.
  • deflection compensation roller is now used in particular as a marking roller.
  • deflection compensation rolls are also called bend compensation rolls or NipCo (NipCorrect) rolls.
  • the wider the Yankee cylinder the stronger the phenomenon of deformation of the Yankee surface. And the wider the Yankee cylinder, the greater the risk that when using classic rollers as marking rollers, the pressure force of the roller or the covering (particularly the marking felt) on the paper web will be different across the width of the fibrous web, causing unevenness Markings on the paper web can occur. Compensation by a general increase in the contact force is not desirable, as this leads to over-pressing of the web in other places and the specific volume of the web suffers.
  • the marking nip can be controlled in a targeted manner and the marking pattern of the fibrous web can also be adjusted in a targeted manner.
  • the use of a deflection compensation roller as a marking roller is very advantageous.
  • deflection compensation roller as a marking roller also offers advantages because the machine can be optimized for frequent grade changes should. For different types, the machine is operated with different steam pressures in the Yankee cylinder, which leads to significantly different deformations. These can be compensated for using the deflection compensation roller, which ensures an even marking nip and a uniform marking pattern on the fibrous web.
  • the machine In many cases it will be expedient for the machine to have a transfer clothing for transporting the fibrous web to the Yankee cylinder, with the transfer clothing being guided through the transfer ip together with the fibrous web.
  • At least one, in particular all, deflection compensation rollers comprise a rotatable jacket made of a fiber composite material, in particular a GRP jacket, which in particular has an outer coating made of a polyurethane.
  • GRP glass fiber reinforced plastic is a material made of plastic and glass fibers.
  • Pressing can be carried out, for example, using a bending compensation roller with elastic material made of a GRP composite material, such as a NipcoFullFlex roller with convex support sources, or pressing using a shoe press roller, such as a NipcoFlex T-roll as in tissue machines, i.e. a shoe roller with a concave pressure shoe QualiFlex jacket.
  • a bending compensation roller with elastic material made of a GRP composite material such as a NipcoFullFlex roller with convex support sources
  • a shoe press roller such as a NipcoFlex T-roll as in tissue machines, i.e. a shoe roller with a concave pressure shoe QualiFlex jacket.
  • a deflection compensation roller with an elastic jacket a deflection compensation roller with a composite jacket can be used - such as the so-called NipcoFullFlex roller - which is significantly more flexible than a steel or cast jacket and can therefore better follow the contour of the Yankee cylinder.
  • a roller differs from a shoe roller in that, among other things, no concave shoe is used as a support source, but rather several convex support sources located next to one another, usually closely spaced over the length of the roller or width of the machine.
  • Such a jacket is made up of a CFRP jacket or GRP jacket with an outer coating made of polyurethane.
  • Such a coat is more flexible than a steel or cast jacket, so that it can better adapt to the changing contour of the Yankee cylinder.
  • a pressure roller marking roller and/or transfer roller
  • 2 deflection compensation rollers can be arranged on the Yankee cylinder, each in separate, independent clothing loops.
  • the first of the two rollers should be referred to as the 'transfer roller' and the second as the 'marking roller'.
  • a cantilever can be inserted into each covering loop
  • the bending compensation rollers adapt ideally to the respective bombing conditions of the Yankee cylinder, which result from different steam pressures in the Yankee cylinder.
  • the first bending compensation roller including a possible associated protective felt loop as a transfer covering, has the task of transferring the paper web to the MG cylinder and fixing it there evenly in the CD direction (i.e. in the cross-machine direction).
  • the second bending compensation roller behind it in the running direction creates a mark, e.g. a line embossing, on the paper web surface using its own surrounding marking felt.
  • the second nip can also be swiveled away/retracted, allowing a paper web to be produced without a line marking.
  • the marking felts Due to possible small production quantities of the respective marked, especially lined paper qualities, the marking felts are usually far from worn out when the felt is changed. Therefore it is neither economical nor It makes ecological sense to cut up and dispose of the old marking felt as usual when changing the felt. Rather, it is desirable if this felt can be used again in the next production of the corresponding type. Therefore, this invention also aims at a non-destructive felt changing concept.
  • a new marking felt can be inserted very quickly, meaning that production can be restarted with a new pattern after a changeover time of 30-90 minutes.
  • Extractor of the marking roller including hydraulic cylinder for positioning the roller and locking the extractor
  • the machine includes an extension device in order to move the marking roller laterally out of the machine.
  • the extension device comprises an extension rail and an extension support which is connected to the marking roller, wherein the extension support is movable along the extension rail and can be removed from the machine together with the marking roller.
  • At least one lifting element is provided for pivoting the marking roller towards and away from the Yankee cylinder, which is connected to the marking roller and a seating part of the machine, the lifting element being designed to be decoupled from the marking roller and/or the seating part .
  • the lifting element can comprise or consist of a hydraulic cylinder.
  • the marking roller can, for example, be extended to the driver's area of the machine by means of a permanently integrated device without a crane device.
  • the marking roller can be decoupled from other machine parts, such as hydraulic cylinders, pivot bearings, etc., and completely extended out of the machine by means of a pulling device (manually or automatically). become. From there, the crane can pick up the entire roller in one operation.
  • the marking roller is connected or can be connected to an extension support.
  • This extension carrier can be guided in an extension rail and removed from the machine together with the marking roller.
  • An alternative 'marking roller' if necessary, can then be attached to this extension beam, which is also an entry beam, and reinserted into the extension rail.
  • a lifting element can be provided for pivoting the marking roller on and off.
  • This lifting element is usually connected to both the marking roller and the chair.
  • this lifting element can be decoupled from the roller or from the chair.
  • the lifting element can be hydraulic Lifting cylinder can be carried out and can be decoupled from the marking roller. When the roller is pulled out - together with the extension support - the lifting element can remain on the frame in the machine.
  • the cantilever and machine frame of the Yankee cylinder can be designed in such a way that 2x clothing guides (felt/screen) arranged one above the other can be arranged, including, for example, with integrated bending compensation rollers. Additional cantilevers can be installed for the felt/screen run below (supporting the main cantilever).
  • the machine comprises a tension roller, with the covering loop arranged around the marking roller and the tension roller, and guided through the marking nip, and with means being provided in the machine to move the tension roller from a working position to a maintenance position to move.
  • the tension roller in the clothing loop can be brought into a storage position by means of a rotatable or translationally moved device. This is done without the help of a crane. This is advantageous because the crane is freely available for other work during this activity. This means that in the overall context of the felt/screen change, important downtime can be minimized or saved. This is all the more important because usually only one indoor crane is provided in a paper machine hall, and the availability or unavailability of this crane has a decisive influence on the duration of the maintenance shutdown.
  • the maintenance position of the tension roller is chosen so that the covering loop of the marking felt is not under tension when the Tension roller is in maintenance position. This absence of tension is a prerequisite in order to be able to remove or pull in the marking felt from the machine undamaged.
  • the machine includes a Yankee cylinder for drying and/or smoothing the fibrous web, as well as a
  • Transfer roller which can be placed on the Yankee cylinder to form a transfer nip
  • the machine further comprising a marking roller, which can be placed on the Yankee cylinder to form a marking nip, the marking nip being arranged after the transfer nip when viewed in the running direction of the fibrous web.
  • the machine comprises a clothing, in particular a marking felt, and a tension roller, the clothing being arranged in the form of a clothing loop around the marking roller and the tension roller and being guided through the marking nip.
  • means are provided in the machine to move the tension roller (6) from a working position to a maintenance position.
  • At least one lifting element is provided for pivoting the marking roller towards and away from the Yankee cylinder, which is connected to the marking roller and a seating part of the machine, the lifting element being designed to be decoupled from the marking roller and/or the seating part.
  • the marking roller and/or the transfer roller can be designed as a deflection compensation roller. This is not absolutely necessary for the procedure of changing the covering.
  • the method works just as well for machines in which the marking roller and/or the transfer roller are designed as classic rollers, for example as cambered rollers, in particular with negative cambering.
  • the procedure includes the steps: a. Moving the tension roller from the working position to the maintenance position b. Decoupling the lifting element from the marking roller and/or the seating part c. Providing a first exchange unit to accommodate the
  • the method can also include the steps: e. Providing a second changing unit on which a second clothing loop is mounted f. Transferring the second clothing loop from the second changing unit into the machine so that the second clothing loop is arranged around the marking roller and the tension roller. G. Coupling the lifting element with the marking roller and/or the seating part h. Moving the tension roller from the maintenance position to a working position.
  • the felt/screen changing unit is provided to enable quick changing times of the felts/screens.
  • the changing unit can be designed by means of locally defined guide rails (support strips) along the screen loop in the machine.
  • the method steps c. and d. be carried out as follows: c. Providing a first exchange unit to accommodate the
  • Covering loop with a second covering loop being pulled onto the first changing unit d. Transfer of the clothing loop from the machine to the first changing unit, with the clothing loop being placed in particular on the second clothing loop.
  • the method further comprises the steps: f. Transfer of the second clothing loop from the first changing unit into the machine, so that the second clothing loop is arranged around the marking roller and the tension roller, in particular the first clothing loop remains on the exchange unit g. Coupling the lifting element with the marking roller and/or the seating part. H. Moving the tension roller from the maintenance position to the working position
  • both the clothing can be removed from the machine and the second clothing can be pulled into the machine with a single changing unit.
  • the provision of a second changing unit and moving these changing units back and forth are no longer necessary, which means that the changing of the clothing can be further accelerated.
  • the clothing is pulled over the second clothing, which is located on the first changing unit, when it is pulled out of the machine. If one or both coverings have a rough surface, this may prove difficult or require a lot of effort.
  • a sliding layer is arranged between the clothing loop and the second clothing loop, in particular both the top and the bottom having a lower roughness than the clothing loop and the second clothing loop. This will do both Removing the clothing loop from the machine makes it easier as well as pulling the second clothing loop into the machine.
  • the sliding layer can be, for example, a polymer film or a smooth polymer tape.
  • the sliding layer with the second clothing loop can expediently be put on a corresponding changing unit while the machine is still running.
  • the machine downtime is therefore not increased by the provision of the sliding position.
  • the first changing unit and/or the second changing unit is designed as a mobile changing unit, which can be moved, for example, with an indoor crane. This enables the felt/screen to be quickly extended onto the empty changing unit docked with the crane. The same applies to the insertion of the felts/screens using the docked, second changing unit equipped with a felt/screen and with the second covering loop.
  • such a mobile changing unit has a slip-on pin
  • the machine has a receptacle for the slip-on pin, and that when ready, the first changing unit and/or the second changing unit is positioned so that the slip-on pin is inserted into the receptacle .
  • the second covering (felt/screen) to be put on can be put on a first changing device before it comes to a standstill. After the covering has been pulled from the machine onto the first changing unit and removed from the machine when it is at a standstill, the second one can be used immediately Dock the exchange unit on the cantilever and the new second covering can be pulled into the machine. In this way, the change of clothing can be further accelerated.
  • the attachment pin can, for example, be round, which makes it easier to dock the changing device.
  • attachment pin can also be non-round (rectangular, triangular, etc.) This ensures that the changing device is always optimally positioned after docking.
  • the first changing unit is designed as a stationary changing unit.
  • the changing unit it can be provided, for example, that a number of guide rails and / or guide ropes are attached to the chair and, if necessary, a counter bearing.
  • These guide rails or guide ropes can be installed on the driver's side of the machine while the machine is still running.
  • the second covering can already be mounted on the stationary changing unit. It is also possible for a sliding layer to be placed on this stationary exchange unit. All of this can be prepared while the machine is still running. In addition, all of these preparation measures are possible without the use of an indoor crane. This is different from the use of mobile exchange units, where an indoor crane is usually required to transport the exchange unit due to its weight. The hall crane can be used for other activities while the stationary changing device is being set up.
  • the machine described is part of a larger machine for producing a fibrous web, in particular a paper or cardboard web, with a headbox, a forming unit, a press section, a pre-drying section, the MG smoothing Yankee cylinder described and a winding up , wherein the pre-drying section is designed in particular for one-sided pre-drying of the fibrous web on its underside, for example an overhead MG smoothing Yankee cylinder is provided as an MG smoothing Yankee cylinder, with which the underside of the fibrous web is brought into contact.
  • a re-moistening device in the web running direction (L) after the pre-drying section and before the fibrous web runs onto the MG smoothing Yankee cylinder, can be provided for one-sided re-moistening of the fibrous web on its underside and accordingly for the development of the moisture gradient in the z-direction of the fibrous web towards its underside be.
  • Figure 1 shows a machine according to one aspect of the invention
  • Figure 2 shows a machine according to a further aspect of the invention
  • Figure 3 shows a machine according to a further aspect of the invention
  • Figure 4 shows a machine according to a further aspect of the invention
  • Figures 5a, 5b and 5c show mobile changing units according to further aspects of the invention
  • Figures 6a, 6b, 6c and 6d show the steps of changing the clothing with a stationary changing unit according to further aspects of the invention
  • FIG. 1 shows a section of a machine for producing a special paper web, such as is used, for example, for producing so-called machine-smooth papers (MG papers).
  • An essential component of such a machine is a large, usually steam-heated cylinder 1, which is referred to as a Yankee cylinder or MG cylinder.
  • the paper web is transported from a transfer clothing 8 to the Yankee cylinder 1, usually with a moisture content in the range between 40% and 58%, and transferred to the Yankee cylinder 1 in a transfer ip 4.
  • the transfer ip 4 is formed by the Yankee cylinder 1 and a transfer roller 2, which is applied to the Yankee cylinder 1.
  • the transfer roller 1 is designed as a deflection compensation roller.
  • in the direction of travel of the paper web, or in the direction of rotation of the Yankee cylinder 1 has a marking nip 5 arranged after the transfer nip 4.
  • This marking nip 5 is formed by the Yankee cylinder 1 and a marking roller 3, which can be placed on the Yankee cylinder 1 to form the marking nip 5.
  • the machine has a covering 7, which is usually designed as a marking felt 7.
  • This marking felt 7 is guided in a covering loop around the marking roller 3 and a tension roller 6 and, if necessary, further guide rollers and thus also runs together with the paper web through the marking nip 5.
  • Figure 1 shows a state in which the tension roller 6 is in a working position 6a , whereby the covering 7 is under a suitable tension.
  • a maintenance position 6b provided - for example a suitable storage position. If the tension roller is in the maintenance position 6b, the clothing is not under tension, so that the clothing can be changed.
  • the paper web is smoothed on the side facing the Yankee cylinder 1 and also acquires a certain shine. In order to maintain the specific volume of the paper, this smoothing is carried out without the usual calenders.
  • the side of the paper web facing away from the Yankee cylinder 1 receives a marking in the marking nip 7 when appropriate marking felts 7 are used, for example in the form of a line. It is important that despite the deformation of the Yankee cylinder 1 due to the exposure to steam, the marking nip 3 is very uniform across the entire width of the machine, otherwise the paper will be marked unevenly, which in the worst case will lead to increased waste. Therefore, in the machine according to aspects of the invention, the marking roller 3 is designed as a deflection compensation roller.
  • a deflection compensation roller with a composite casing can be used as a deflection compensation roller.
  • a jacket is made up of a CFRP jacket or GRP jacket with an outer coating made of polyurethane.
  • Such a jacket is more flexible than a steel or cast jacket, so that it can adapt better to a changing contour of the Yankee cylinder 1.
  • both the marking roller 3 and the transfer roller 2 can be designed as deflection compensation rollers, and in particular both can have a composite jacket as described above.
  • the NipcoFullFlex rollers from the registration ring are ideal for this.
  • FIG. 2 again shows the machine from Figure 1, but with a focus on the details of the marking roller 7.
  • the machine again includes two cantilevers 11, 12; one for each clothing loop 7, 8.
  • An extension rail 20 is attached to the cantilever 11 assigned to the marking felt 7 or the marking roller 3, which extends in the transverse direction of the machine.
  • An extension support 21 is guided in this extension rail 20.
  • the marking roller 3 is attached to this extension support 21. This makes it easier to change the marking roller 3, as it can be easily pulled out and removed along the extension rail 20, for example in the direction of the driver's side FS of the machine. Either the same marking roller 3 or an alternative roller can then be attached to the extension support 21 and reinserted into the machine using the extension rail 20.
  • FIG. 2 also shows lifting element 20, which is used to apply or move the marking roller 3 to the Yankee cylinder 1.
  • This lifting element 20 is designed here as a hydraulic lifting cylinder 20, which is connected to both the marking roller 3 (or its bearing) and to a seating part.
  • the lifting element 20 in FIG. 2 is designed in such a way that it can be decoupled from the marking roller 3.
  • the decoupled lifting element 22a then remains on the chair while the marking roller 3 is removed or replaced.
  • the lifting element can therefore be used both for positioning the rollers and for locking the extension device.
  • FIG 3 again shows a machine of the type shown in Figures 1 and 2.
  • the tension roller 6 moves from the working position 6a into the Maintenance position 6b can be moved without using external aids such as an indoor crane. This can be done via a translational movement or a rotational movement, which can take place, for example, along suitable rail elements. Since the use of the bottleneck resource of the indoor crane is again avoided, this feature noticeably contributes to an accelerated change of the covering 7.
  • Figure 4 shows a machine whose seating has at least four cantilevers 11, 12, 13, 14. So-called intermediate pieces 15 are provided between the cantilevers 11, 12 or the cantilevers 11, 12 and other seating parts. If, for example, the marking felt 7 is to be changed, the intermediate pieces 15 adjacent to the cantilever 11 can be removed and the marking felt can be inserted or removed through the resulting openings.
  • FIGS. 5a, 5b and 5c go into more detail about a method according to a further aspect of the invention and explain the advantageous use of mobile changing units 25, 26.
  • Figure 5a shows the side view of a changing unit 25, which hangs on a holding element on an indoor crane.
  • a support element extends centrally, at the front end of which a plug pin 28 is provided.
  • the changing unit has guide rails 28 at least above and to the side of the support element. The clothing is placed on these guide rails 28 when changing the clothing.
  • Figure 5b shows a front view of such a changing unit 25, 26.
  • a marking felt 7 is already pulled onto the changing unit 25, 26 and rests on the guide rails 28.
  • This can, for example, be a second changing unit 26, onto which an alternative marking felt 7 is mounted, which is then to be drawn into the machine.
  • the plug-on pin 27 can be inserted into a corresponding receptacle on the driver-side FS end face of the cantilever 11.
  • the slip-on pin 27 is designed as a round, cylindrical or slightly conical slip-on pin 27 in the examples in FIGS. 5a - 5c. This makes it easier to insert the attachment pin 27 into the cantilever receptacle.
  • the intermediate pieces 15 around the cantilever 11 are removed, so that the marking felt 7 can be pulled from the machine onto the changing unit 25, or from the changing unit 26 onto the machine. After changing the covering, the intermediate pieces 15 can be inserted again.
  • Figures 6a, 6b, 6c and 6d show the steps of changing the clothing with a stationary changing unit 25 according to further aspects of the invention.
  • Figure 6a shows the driver's side FS of a machine, with a clothing loop 7, in particular a marking felt 7, being attached to the machine.
  • the machine is usually still in operation in the situation shown in Figure 6a.
  • the seating on the driver's side with the cantilever 11 still has the corresponding intermediate pieces 15.
  • a stationary changing unit 25 can be erected without using a crane, for example by installing a number of guide rails 28 and/or guide ropes 29 as in Figure 6a.
  • These guide rails 28 or guide ropes 29 can be attached at one end to the chair, for example to the cantilever 11, and at the other end to a counter bearing such as a hall wall.
  • a second clothing loop 7b is pulled onto the stationary changing unit 25.
  • This second clothing loop 7b should be pulled into the machine in the shortest possible time during the next standstill of the machine, while the clothing loop 7 is removed.
  • a sliding layer 30 is provided in the changing unit 25 in FIG. 6a.
  • the sliding layer 30 serves to separate the covering 7 and the second covering 7b from one another when changing the covering and to enable the coverings to be moved more easily over one another.
  • the sliding layer 30 can be realized, for example, as a polymer film or as a smooth polymer tape.
  • the sliding layer 30 is realized in FIG. 6a as a loop which is pulled onto the changing unit 25 around the second covering loop 7b.
  • the sliding layer 30 is in the manner of a Sliding blanket is designed, which is only placed from above over the second covering loop 7b. In many cases, such a sliding blanket is sufficient to achieve the desired effect.
  • the second covering 7b can be pulled into the machine. Even during this retraction, the sliding layer 30 ensures easy movement of the coverings 7, 7b. It will be expedient to fix the sliding layer 30 during the movement of such a covering 7 or a second covering 7b in order to prevent this sliding layer from being accidentally moved away.
  • the lifting element 22 can be coupled to the marking roller 3 and/or the seating part as well as the tension roller 6 can be moved from the maintenance position 6b to the working position 6a, and the intermediate pieces 15 can be reinserted.
  • the clothing change is then completed and the machine can be started up again.
  • the stationary changing unit 25 can then be dismantled and the removed covering 7 removed. This work then no longer has any influence on the duration of the machine downtime.
  • the changing process shown here can be carried out entirely without using an indoor crane. As can be seen from Figures 5a - 5c and 6a - 6d, it is irrelevant for the methods shown for changing the clothing how the marking roller or transfer is designed, in particular whether it is a deflection compensation roller or not

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Abstract

L'invention concerne une machine pour produire ou usiner une bande de matière fibreuse, comprenant un cylindre Yankee pour sécher et/ou lisser la bande de matière fibreuse, ainsi qu'un cylindre de transfert qui peut être appliqué contre le cylindre Yankee en formant une ligne de transfert, la machine comprenant en outre un rouleau de marquage qui peut être appliqué contre le cylindre Yankee en formant une ligne de marquage, cette ligne de marquage étant disposée en aval de la ligne de transfert vu dans le sens de défilement de la bande de matière fibreuse, et la machine comportant un habillage, en particulier un feutre de marquage, l'habillage étant disposé sous la forme d'une boucle d'habillage autour du rouleau de marquage et étant guidé à travers la ligne de marquage. Il est prévu que le rouleau de marquage et de préférence également le rouleau de transfert soient réalisés sous la forme d'un rouleau de compensation de flexion.
PCT/EP2023/065884 2022-07-05 2023-06-14 Machine et procédé WO2024008405A2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102022116685.6 2022-07-05
DE102022116685 2022-07-05
DE102022119887.1 2022-08-08
DE102022119887.1A DE102022119887A1 (de) 2022-08-08 2022-08-08 Maschine und Verfahren

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WO2024008405A2 true WO2024008405A2 (fr) 2024-01-11
WO2024008405A3 WO2024008405A3 (fr) 2024-03-28

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017118218A1 (de) 2017-08-10 2019-02-14 Voith Patent Gmbh Maschine und verfahren zur herstellung einer faserstoffbahn
DE102017118222A1 (de) 2017-08-10 2019-02-14 Voith Patent Gmbh Maschine und verfahren zur herstellung einer faserstoffbahn
EP3974576A1 (fr) 2020-09-29 2022-03-30 Voith Patent GmbH Machine et procédé de fabrication d'une bande de matière fibreuse

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO130694C (fr) * 1962-08-03 1975-01-22 Beloit Corp
US3600273A (en) * 1968-09-27 1971-08-17 Black Clawson Co Paper machine press section
US3694311A (en) * 1971-01-18 1972-09-26 Karlstad Mekaniska Ab Machine for making thin paper
US4450630A (en) * 1982-03-26 1984-05-29 The Black Clawson Company Paper machine drying section
DE102008001410A1 (de) * 2008-04-28 2009-10-29 Voith Patent Gmbh Maschine zur Herstellung einer einseitig glatten Papierbahn
EP3165673B1 (fr) * 2015-11-09 2018-06-27 Valmet Technologies Oy Ligne de fabrication de bandes de fibres

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017118218A1 (de) 2017-08-10 2019-02-14 Voith Patent Gmbh Maschine und verfahren zur herstellung einer faserstoffbahn
DE102017118222A1 (de) 2017-08-10 2019-02-14 Voith Patent Gmbh Maschine und verfahren zur herstellung einer faserstoffbahn
EP3974576A1 (fr) 2020-09-29 2022-03-30 Voith Patent GmbH Machine et procédé de fabrication d'une bande de matière fibreuse

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