• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The subject of the present invention is an arrangement (10) which is intended for producing a multilayer fibrous web in a fiber web machine and which comprises a couch roll (12) over which a first support fabric (F1) is adapted to run and wherein on the couch roll a first wrap angle (a1 ), wherein in the formation of the fibrous web, the first layer (W1) on the side facing away from the couch roll side of the first support fabric is adapted to run on the couch roll, wherein the arrangement further comprises a second support fabric (F2), which forms a second In the formation of the fibrous web, the second layer (W2) is adapted, on the roller facing side of the second support fabric to the couch roll to run, and wherein the second layer (W2) to form a multilayer fiber web (W) with the he The arrangement is arranged at a distance from the surface of the couch roll (12) suction device (14). The invention also relates to a method of forming a multi-ply fiber web and a fiber web machine.
    公开号:AT513315A2
    申请号:T579/2013
    申请日:2013-07-17
    公开日:2014-03-15
    发明作者:Sami Anttilainen；Samppa Salminen
    申请人:Metso Paper Inc；
    IPC主号:
    专利说明:

    The object of the present invention is an arrangement intended to form a multilayer fibrous web in a fiber web machine, comprising a couch roll over which a first support fabric is arranged to form a first wrap angle on the couch roll and during formation the fibrous web the first web, ie Able to run on the side facing away from the roller side of the first support fabric to run on the couch roll, wherein the arrangement further comprises a second supporting fabric, which is set to form a second wrap angle in the region of said first wrap angle to run on the couch roll, wherein in the formation of the fibrous web (ie in sheet formation), the second layer is adapted to run on the nip side of the second support fabric facing the nip roller and the second layer is arranged to unite to form a multi-ply fibrous web with the first layer , and wherein the arrangement comprises a suction device arranged at a distance from the surface of the couch roll.
    The invention is also a multi-layer fiber web machine with a serving for producing a multilayer fiber web in the fiber web machine arrangement with a couch roll over which to run a first support fabric is set to form a first wrap on the skin roller surface, wherein in the formation of the fibrous web the first layer is adapted to run on the side of the first support fabric facing away from the couch roll on the couch roll, and the arrangement further comprises a second supporting fabric which is adapted to run on the couch roll and in the region of said first wrap angle second wrapping angle, and wherein in the formation of the fibrous web, the second layer is adapted to run on the roller facing side of the second supporting fabric on the skin roller, and the second layer is adapted to form a multi-layer bevel to connect the material web with the first layer, and wherein the arrangement has a suction device arranged at a distance from the surface of the skin roller. 2.19
    The invention furthermore relates to a method for producing a multilayer fiber web in a fiber web machine, which has a couch roll over which a first support fabric runs on the couch roll to form a first wrap angle, the first one forming the fiber web Location on the side facing away from the roller side of the first support fabric located on the
    Gautschwalze runs and the second support fabric of the fiber web machine runs to form a second wrap angle in the region of said first wrap on the skin roller, wherein in the formation of the fiber web, the second layer on the roller facing side of the second support fabric runs on the couch roll and the second layer in the region of the second angle of wrap on the skin roller to form a multilayer fiber web is gauze to the first layer and wherein in the method, the second support fabric is subjected to a suction effect.
    The invention relates to fiber web machines, but especially cardboard machines in which the formation of the fiber web belongs to the joining together of at least two layers.
    The fibrous web is typically formed from water-based fabric whose dry content is first increased by mechanical means, and when the dry content is higher, also by evaporation of water from the fibrous web. In the manufacture of a multi-ply fiber web, it is common to join the plies together after their formation phase, when they are still relatively wet, i. to gothe. In multilayer formers, such as in board machines, the layers are usually formed separately and then zusammengegautscht before the press section.
    The commonly used technique in assembling the sheets has been the open transfer roll in conjunction with a subsequent curved transfer suction box, with which water is sucked down and at the same time the formed multi-ply sheet is peeled off the top wire. In the Finnish patent application Fl 20010287 a solution is described, with which the assembly of the layers improves and so also the gap strength of the multilayered 3/19
    3: • · · 34337 / ab
    Fiber web is increased. Here, too, the layers are joined together by means of an open transfer roll, but at the same time they are subjected to a flow of water and thus also a mixing of the fine material by means of negative pressure, and a densification of the fiber web is achieved. Here, therefore, the connection takes place at the point of coincidence of the position brought about by the upper wire and the position transported by the lower wire in conjunction with the transfer roller and in the suction region of the suction box. According to the published patent application Fl 20010287, the suppression can also be generated with the suction box known from the document Fl 965277 A, in which at least in the operating situation the lid of the suction box or the position of the strips is curved so that the wire tension caused by the suppression of the suction box Normal force between the sieve and the lid or the strips reduced.
    Although the solution described in the document Fl 20010287 is advantageous per se, has since become a need to improve the formation of the multilayer fiber web and the Vergautschen the layers so that achieved compared to previously even more advantageous and reliable solution becomes.
    The object of the invention is achieved by an arrangement for forming a multi-ply fiber web in a fiber web machine, which arrangement comprises a couch roll over which a first support fabric runs and forms a first wrap on the roller, wherein in the formation of the fiber web, the first Is arranged on the side facing away from the roller side of the first support fabric to run on the couch roll, said assembly further comprises a second supporting fabric, which is adapted to run on the couch roll and in the region of said first wrap angle forms a second angle of wrap, in wherein, in the formation of the fibrous web, the second layer on the roll-facing side of the second support fabric runs on the skin roll, where the second layer joins the first layer and a multi-ply fiber web is formed, and wherein said assembly is spaced apart from the skin roller surface a Said suction device comprises and the suction device is adapted to, in the formation of the fiber web 4/19
    34337 / from the multi-layer fiber web in the region of said first wrap angle of the first tissue release and bring to run with the second tissue. It is characteristic of the arrangement that suction of the suction device in the machine direction starts behind the second wrap angle and that the suction device is concave in the machine direction in its surface and the functional surface of the suction device is directed toward the skin roll surface.
    The objects of the invention are also achieved with a multi-layer fiber web machine having an arrangement for forming a multi-ply fiber web in the fiber web machine comprising a Gautsch roller, over which a first support fabric is set to run and forms a first wrap on the couch roll in which, in the formation of the fibrous web, the first layer is arranged to run on the couch roll on the side of the first support fabric facing away from the roll, said assembly further comprising a second supporting fabric adapted to run on the couch roll and in the region of said first wrapping angle forms a second wrapping angle, in which region in the formation of the fibrous web the second layer on the roll-facing side of the second supporting fabric runs on the couch roll, where the second layer joins said first layer and forms a multilayer fibrous web, and said said Anor In the formation of the fiber web, the suction device is designed to release the multilayer fiber web from the first tissue in the region of said first wrap angle and to bring it to run with the second tissue. For the fiber web machine, it is characteristic that the suction of the suction device starts from the second wrap angle when viewed in the machine direction, and that the suction device is concave in the machine direction on its surface and the functional surface of the suction device is directed toward the skin roll surface. [009] According to one embodiment of the invention, the suction effect of the suction device, as seen in the machine direction, begins behind the second wrap angle, preferably at its trailing edge.
    According to one embodiment of the invention, the suction device has a number of support elements which are arranged at mutual distances, that between them suction gaps remain and the support elements substantially rigid, i. Inelastic attached to the suction device.
    According to one embodiment of the invention, the shrinkage of the second supporting fabric in the suction device and the drainage of the same substantially in the direction of the tangents whose rear and the leading edge, that is without kinking at the edges of the suction device.
    The objects of the invention are also achieved with a method for forming a multi-ply fiber web in the fiber web machine, which comprises a couch roll over which a first support fabric is set to run and forms a first wrap on the couch roll, wherein in forming the Fiber web, the first layer on the side facing away from the roller side of the first support fabric runs on the skin roller, wherein in the method, a second support fabric of the fiber web machine runs on the couch roll and forms a second angle of wrap in the region of said first wrap angle, wherein in the formation of the fiber web the second layer on the roll-facing side of the second support fabric runs on the skin roller and the second layer is combined with the first layer to form the multilayer fiber web, and wherein in the method on the second support fabric, a suction effect and the second support fabric and the multilayer fiber web is detached from the first support fabric by directing a suction effect on the second support fabric and the fiber web in the region of the first wrapping angle through the second support fabric and the multilayer fiber web is brought to run with the second support fabric. It is characteristic of the method that the suction effect of the suction device in the machine direction starts behind the second wrap angle, and that at the same time when the second fabric and the multi-ply fiber web run from the couch roll, whose direction is changed by means of the concave suction device.
    According to one embodiment of the invention, the shrinkage of the second support fabric into the suction device and the drainage of the same substantially tangential to the rear and the leading edge, that is without kinking at the edges of the suction device. The running direction of the second supporting fabric is changed by the suction device by at least 10 degrees.
    In the method, the Vergautschen the first and the second layer is carried out by pressing with the second support fabric.
    With the invention to achieve several advantages, of which are mentioned as examples:
    Gaping of the layers is accomplished with relatively short wrap, thereby keeping control of the fabric drives and power distribution under control;
    Since during the transition of the fiber web, the support fabric at the transfer point quickly diverge at a relatively large angle, the fiber web has a stable run; With the solution according to the invention to achieve a Formierpartie of low overall height;
    With the solution according to the invention, the friction of the fabric during the Gautschvorgang is reduced.
    In the following, the inventive method and the system according to the invention are described in detail with reference to the accompanying schematic drawings.
    Show: 7/19 • ·
    7 ·
    34337 / down
    1 shows the arrangement according to the invention in a fiber web machine.
    Fig. 2 is a detail of the arrangement of Fig. 1;
    3 shows a fiber web machine according to an embodiment of the invention;
    Fig. 4 is a fiber web machine according to another embodiment of the invention; Fig. 1 shows the arrangement 10 for forming a multi-ply fiber web W. In Fig. 2, a detail of the arrangement of Fig. 1 and the lattice to be realized therewith of the layers is shown. The arrangement 10 is intended as a construction part of a fiber web machine, in which at least two previously formed layers W1, W2 are stacked to form a fiber web W. This is shown by way of example in FIG. 3. It should be noted that in Figs. 1 and 2, one or both of the previously prepared layers may be either single or multi-layered. The arrangement comprises a couch roll 12, over which the first support fabric F1 is guided, thereby forming the first wrap angle a1 on the couch roll. In the formation of the fibrous web, the first layer is located on the side of the first supporting fabric F1 facing away from the nipple 12, ie viewed from the roller on the outside of the fabric and in Fig. 1 also on the bottom of the fabric located on the couch roll 12th guided.
    The arrangement further comprises a second support fabric, which is adapted to emerge on the couch roll 12 to form a second wrap angle a2 in the region of said first wrap angle a1. The second layer W2 runs on the Gautsch roller facing side of the second supporting fabric F2 located on the couch roll 12, wherein in the region of the second wrap angle a2 the Zusammengautschen the layers to a multi-layer fiber web W takes place. The second angle of wrap begins at the point a, where the second support fabric F2 and the layer W2 supported by it are tangential to the 8/19 ·························· 8: 34,337 / ab
    Layer W1, which is supported by the tissue located on the surface of the roller 10, add.
    Further, the arrangement comprises a suction device 14, which is arranged at a distance from the surface of the couch roll 12. The functional surface of the suction device is the surface of
    Gautschwalze pointed out. The functional surface of the suction device comprises support elements 22, for example ledges, and gaps 24 between them, through which a suction effect can be exerted on the fibrous web W. According to one embodiment, the support elements are firmly and inelastically attached to the suction device. The suction device is connected to a vacuum source, for example to the vacuum system of the fiber web machine, for supplying it with vacuum. If the suction device is set up to function in the formation of the fiber web detachment of the multi-ply fiber web W of the first fabric F1 and the running of the fiber web with the second fabric F2, the transition is controlled and controlled thanks to the action of the suction device always exactly. At the same time, the first support fabric F1, now detached from the fibrous web W, continues its course on the couch roll 12. The suction effected by the suction device has no significant effect on the first support fabric F1, since this fabric is permeable to air to a degree that no significant pressure difference can build up across the fabric. In addition, the coverage area on the suction device in which the first support fabric is in contact with the fibrous web W is relatively short. In this way, among other things, the problems resulting from any speed difference of the tissue can be minimized. The second wrap angle a2 ends at the point b at which the multilayer fiber web W separates from the surface of the first support fabric F1 due to the action of the suction device 14. The second wrap angle a2 can be defined with the help of the geometry of the machine so that a successful Vergautschen the layers is guaranteed.
    As can be seen from Fig. 2, while the second fabric F2 and the multi-ply fibrous web continue their path detached from the couch roll 12, their 9/19 * · ♦♦ · # «· 34337 / ab ♦ · ♦ ♦ ♦ · * · ♦ «« · «· · · ♦ ·«
    Moving direction with the aid of the concave suction device 14 is changed so that the direction of the second tissue by the angle ß, which is preferably at least 10 degrees, is changed. It is arranged such that the second support fabric F2 reaches the leading edge of the suction device 14 substantially in the tangential direction and leaves its trailing edge, ie without forming a kink at the edges of the suction device. The suction device 14 can be subjected to a rather strong vacuum to ensure the transfer, without the friction increases too much, because the tension of the fabric F2 compensates for the normal force of the fabric caused by the negative pressure on the surface of the suction box.
    Fig. 3 shows a fiber web machine which is suitable for producing a multi-ply fiber web W. Here, two previously formed layers W1, W1 are laminated to form a fibrous web W. In Fig. 3 a solution according to the prior art is shown in dashed lines and an embodiment of the solution according to the invention shown in solid. Shown are in the drawing, the first Formierpartie I, in which the first layer W1 is formed on the support fabric F1, and the second Formierpartie II, in which the second layer W2 is formed on the support fabric F2.
    In the formation of the fiber web of the layer W1 is withdrawn through the fabric F1 through water and the situation further in the area of the couch roll 12 'out, which consists of an open roll and has the task, the position W1 against the together with To press the fabric F2 of the lower Formierpartie II incoming layer W2. The layer W2 is sprayed from the head box onto the fabric F2 and dewatered through the fabric F2 in a manner known per se or otherwise obvious. On the couch roll 12 ', which consists of a movable roller, the layer W1 is pressed against the incoming together with the fabric F2 layer W2 and so the multi-layer fiber web W is formed.
    When in the solution according to the prior art, the roller 12 'presses against the tissue F2, so the path of the tissue receives only a minor 10/19 »···· ···· ··········· ·· 34337 / ab · · · 1 ff • · · · # -LU * • ·. ··
    Knick. In this case, the path of the tissue F2 is inevitably deflected on the suction box 18.1 preceding the Vergautschung and the following on the Vergautschung suction box 18.2. This creates friction on the suction box, which increases the need for drive power. Also, the susceptibility to wear of the fabric increases. The stronger the travel deflection on the suction boxes, the greater the resulting frictional force.
    According to one embodiment of the invention, the renewal of the fiber web machine shown in dashed lines in Fig. 3 so that at least one new roller 16.1 inserted into the fabric loop of the second Formierpartie II and the couch roll 12 'is displaced to a new position, which by the Reference numeral 12 is shown, or a new Gautschwaltze 12 is installed. In the past, the couch roll 12 'was thus arranged approximately on the connecting straight line of the suction box situated in front of the point of growth and behind the point of the throat. According to the invention, when the machine is being reconstructed, the couch roll 12 is arranged so that the running direction of the supporting fabric F2 on the roll 16.1 changes essentially by at least 10 degrees. This can be realized because a change in the direction of travel with the roller in practice does not increase the frictional force at all. In the embodiment in Fig. 3, a second new roller 16.2 is inserted into the fabric loop of Formierpartie II, with the direction of the support fabric behind the couch roll 12 is restored to its original shape. Between the rollers 16.1 and 16.2, the arrangement shown in FIGS. 1 and 2 including suction device 14 is arranged. The couch roll 12 is now arranged to intersect the straight line between the entry and exit points of the web F2 on the rolls 16.1 and 16.2.
    Fig. 4 shows another embodiment. Also in Fig. 4, the solution shown in Fig. 3, the prior art solution is shown in dashed lines and a second embodiment of the solution according to the invention drawn through. In this embodiment, instead of incorporating a second roller 16.2 according to FIG. 3, the roller 20 which is already present in the fiber web machine is used, to which Fabric F2 and the multi-ply fiber web W from the inventive arrangement 10 are passed. If necessary, existing equipment, such as the suction box 18.2, be repositioned.
    It should be noted that only some of the most advantageous embodiments of the invention are described above. It is therefore to be understood that the invention is not limited to the embodiments described above, but can be applied in the frame set forth by the claims in many ways. Within the scope of the basic idea of the invention, individual features described in connection with the various embodiments can also be used in conjunction with other embodiments and / or, if desired and the technical prerequisites are given, various types of entities can be assembled from the described features.
    Claims: 12/19
    权利要求:
    Claims (9)
    [1]
    DR. FERDINAND GIBLER DR DR. WOLFGANG POTH Austrian and European Patent and Trademark Attorneys GIBLER & POTH PATENTANWÄLTE Claims 1. An assembly (10) for forming a multi-ply fibrous web in a fiber web machine, which assembly comprises Gautschwalze (12) over which a first supporting fabric (F1) is adapted to run and on the roller a first wrap angle (a1), wherein in the formation of the fiber web, the first layer (W1) on the side facing away from the roller side of the first support fabric (F1) is arranged to run to the couch roll, the arrangement further comprising a second supporting fabric (F2) adapted to run on the couch roll and forms a second wrap angle (a2) in the region of said first wrap angle (a1), in which region in the formation of the fibrous web, the second layer (W2) on the side of the second supporting fabric facing the roll on the Gautschwal The second layer (W2) joins the first layer (W1) to form a multi-ply fibrous web (W), and the assembly comprises a suction device (14) spaced from the surface of the couch roll (12) and in the formation of the fiber web, the suction device is set up to release the multilayer fiber web (W) from the first web (F1) in the region of said first wrapping angle (a1) and to make it run with the second web (F2), characterized in that the suction action of the suction device (14) in the machine direction starts behind the second wrap angle (a2), and that the suction device (14) is concave in its surface in the machine direction and the functional surface of the suction device is toward the surface of the skin roller (12) is directed. 13/19 ·············································································································································································································
    [2]
    2. Arrangement according to claim 1, characterized in that the suction effect of the suction device (14) in the machine direction behind the second wrap angle (a2), preferably at the trailing edge of the second wrap angle begins.
    [3]
    Arrangement according to claim 1, characterized in that the suction device comprises a number of support elements (22) which are arranged at mutual distances, that between them suction gaps (24) remain, and that the support elements are fixed substantially inelastic to the suction device ,
    [4]
    4. Arrangement according to one of claims 1-3, characterized in that the second supporting fabric (F2) is arranged so that it reaches the front edge of the suction device substantially in the direction of its tangent and the rear edge of the suction device substantially in the direction of its tangent leaves, ie that it passes these edges without kinking.
    [5]
    5. multi-layer fiber web machine, which for the stacking of a first (W1) and a second layer (W2) comprises an arrangement according to one of claims 1 -4.
    [6]
    A method of forming a multi-ply fibrous web in a fiber web machine comprising a couch roll (12) over which a first support fabric (F1) passes and forms a first wrap angle (a1) on the roll, the first layer being atop the roll In the method, a second support fabric (F2) of the fiber web machine runs on the couch roll 14/19: 14Γ34337 / ab * * * and in the region of the said first wrap angle (cd), the opposite side of the first support fabric (F1) runs on the couch roll. forming a second wrap angle (a2), wherein in the formation of the fibrous web, the second layer (W2) on the roller facing side of the second support fabric (F2) runs on the couch roll, where the second layer (W2) with the first layer (W1 ) or vergautscht and in the region of the second wrap on the Gautschwalze a multilayer fiber web (W) is formed, wherein in the process on the second support fabric (F2) a Saugwir kung (14), wherein the second support fabric (F2) and the multi-ply fiber web (W) from the first support fabric (F1) by directing a suction effect on the second support fabric (F2) and the fiber web (W) in the region of the first wrap angle (a1) are released from the first support fabric through the second support fabric, and the multi-ply fiber web (W) is made to ride with the second fabric (F2), characterized in that the suction of the suction device (14) is behind the second viewed in the machine direction Wrap angle (a2) starts and at the same time, when the second fabric (F2) and the multi-ply fiber web (W) run detached from the couch roll (12), the running direction of which is changed by means of the concave suction device (14).
    [7]
    A method according to claim 6, characterized in that the second support fabric (F2) reaches the leading edge of the suction device substantially in the direction of its tangent and leaves the rear edge of the suction device substantially in the direction of its tangent, i. it passes these edges without kinking.
    [8]
    8. The method according to claim 6 or 7, characterized in that the running direction of the second supporting fabric (F2) with the suction device is changed by at least 10 degrees. 15/19



    34337 / down
    [9]
    9. The method according to claim 6, characterized in that the Zusammengautschen the first (W1) and the second layer (W2) by pressing with the second support fabric (F2).

    old floor r. W. Poth) 16/19 i
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    同族专利:
    公开号 | 公开日
    CN103669099A|2014-03-26|
    FI20125910A|2014-03-04|
    CN103669099B|2017-06-23|
    DE102013213667A1|2014-03-06|
    FI126656B|2017-03-31|
    AT513315A3|2014-08-15|
    AT513315B1|2015-02-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE1117992B|1957-04-05|1961-11-23|Voith Ag J M|Device for automatic transfer of the wet paper web in the paper machine from the suction roll to the removal cloth|
    JP3064134B2|1993-01-14|2000-07-12|三菱重工業株式会社|Multilayer paper forming equipment|
    JP3171419B2|1994-02-02|2001-05-28|特種製紙株式会社|Paper layer forming method and paper layer forming apparatus|
    US6702926B1|1996-12-11|2004-03-09|Voith Sulzer Papiermaschinen Gmbh|Process for forming a multi-ply fiber web|
    FI965277A|1996-12-31|1998-07-01|Valmet Corp|Suction box in a paper machine and procedure in the suction box of the paper machine|
    DE10101549A1|2001-01-15|2002-07-18|Voith Paper Patent Gmbh|Production of a multi-layer paper/cardboard web, has couching station along the web path where water is extracted and the fine matter is dispersed between layers to give a firm bond between them|
    FI20010287A|2001-02-15|2002-08-16|Metso Paper Inc|Plant for joining webs in a former in a cardboard machine or equivalent|
    US7387706B2|2004-01-30|2008-06-17|Voith Paper Patent Gmbh|Process of material web formation on a structured fabric in a paper machine|
    FI116688B|2004-02-13|2006-01-31|Metso Paper Inc|Multi-layer forming portion|
    DE102004000055A1|2004-11-24|2006-06-01|Voith Paper Patent Gmbh|Suction mechanism for formation of paper/carton comprises forming suction roller exhibit flying roller axle and stretching coil/band in a roll shell and suction zone arranged in the roller attached to the pump|
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    FI121147B|2008-06-27|2010-07-30|Metso Paper Inc|Pre-press, web forming part and plant for manufacturing multi-layer web|EP3333314A1|2016-12-08|2018-06-13|Valmet Technologies Oy|Forming unit|
    EP3382094A1|2017-03-31|2018-10-03|Valmet Technologies Oy|Forming section for a multi-ply fiber web and a method for forming a multi-ply fiber web|
    EP3540118A1|2018-03-15|2019-09-18|Valmet Technologies Oy|Fiber web machine and method of forming a multi-ply web|
    法律状态:
    2021-03-15| MM01| Lapse because of not paying annual fees|Effective date: 20200717 |
    优先权:
    申请号 | 申请日 | 专利标题
    FI20125910A|FI126656B|2012-09-03|2012-09-03|Apparatus for forming a multilayer web in a fiber web machine, multi-layer fiber web machine and method for forming a multilayer web with a fiber web machine|
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