EP2096207A1 - Dispositif de moulage à tamis oblique d'une machine destinée à la fabrication d'une bande de matière fibreuse à partir d'au moins une suspension de matière fibreuse - Google Patents

Dispositif de moulage à tamis oblique d'une machine destinée à la fabrication d'une bande de matière fibreuse à partir d'au moins une suspension de matière fibreuse Download PDF

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Publication number
EP2096207A1
EP2096207A1 EP09153689A EP09153689A EP2096207A1 EP 2096207 A1 EP2096207 A1 EP 2096207A1 EP 09153689 A EP09153689 A EP 09153689A EP 09153689 A EP09153689 A EP 09153689A EP 2096207 A1 EP2096207 A1 EP 2096207A1
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EP
European Patent Office
Prior art keywords
suction
headbox
wire former
inclined wire
sieve
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP09153689A
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German (de)
English (en)
Other versions
EP2096207B1 (fr
Inventor
Herbert Aust
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Voith Patent GmbH
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Voith Patent GmbH
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Publication of EP2096207A1 publication Critical patent/EP2096207A1/fr
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Not-in-force legal-status Critical Current
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F9/00—Complete machines for making continuous webs of paper
    • D21F9/02—Complete machines for making continuous webs of paper of the Fourdrinier type
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/48—Suction apparatus

Definitions

  • Schrägsiebformer is for example from the German patent application DE 10 2004 047 518 A1 and is manufactured and sold by the applicant under the name "Hydroformer". It is used primarily for the production of long fiber papers and wet nonwovens, this type of sheet formation fibers and fiber mixtures of various materials are used with a length of 1 to 40 mm.
  • the sieve extends after the expiration of the breast roll initially at an angle of approximately + 20 ° to the horizontal.
  • the headbox brings the pulp suspension on top of the sieve.
  • a drainage element in the form of a multi-zone suction box for dewatering the pulp suspension applied on the top side of the screen is arranged.
  • a plurality of slit suckers are usually arranged for further increasing the dry content in the fibrous web to be produced.
  • web speeds of up to 600 m / min can be achieved with such a type of inclined wire former.
  • the dewatering element is arranged downstream in the wire loop of the screen Saugformierwalze, both a roll diameter in the range of 800 to 1500 mm, preferably from 900 to 1450 mm, in particular of 1,000 to 1,400 mm, as well as at least one having a preferably controllable / controllable negative pressure acted upon suction zone, wherein the at least one suction zone of the Saugformierwalze is completely or partially covered by a arranged on the front wall of the headbox and curved upper lip.
  • Saugformierwalze described which can be driven or driven depending on the use, on the one hand brings the advantage that the dry content of the fibrous web to be produced even without the use of the usual slotted suction noticeably and reliably, that can be increased without fleece backlog and possible associated wrinkling
  • a lifting of the fibrous web to be produced in the deflection area including possible wrinkling or even possible web break is completely avoided.
  • the use of the described suction forming roll opens up the possibility of realizing web speeds of over 1,000 m / min, even in the production of a high-quality fibrous web.
  • the suction roll jacket having an open area in the range of 40 to 80%, preferably 50 to 75%.
  • the Saugwalzenmantel the Saugformierwalze here may comprise a honeycomb cylinder, a fabric with a coarse mesh or a wrapping wire spiral, said Mantelart merely exemplary character and are well known to those skilled.
  • the preferably controllable negative pressure in the suction zone of the suction forming roll has a value in the range from 0.1 to 0.8 bar, preferably from 0.2 to 0, 5 bar, accepts.
  • the generation of the preferably controllable / controllable negative pressure can in this case take place in a known manner by means of at least one negative pressure generating unit, for example a motor driven vacuum pump.
  • the Saugformierwalze preferably at least two, each having a preferably controllable / controllable negative pressure acted upon suction zones, wherein at least one suction zone of the Saugformierwalze is completely or partially covered by the arranged on the front wall of the headbox and curved upper lip.
  • the preferably controllable negative pressures in the suction zones of the suction forming roller can favorably assume different values in the range from 0.1 to 0.8 bar, preferably from 0.2 to 0.5 bar, and / or the suction zones of the suction forming roller may have increasing negative pressures in the direction of the wire run.
  • the at least one preferably controllable / controllable negative pressure on the suction forming roll is preferably adjustable in such a way that at least 5 and at most 30% of the amount of pulp suspension supplied to the headbox is dewatered with the suction forming roll.
  • the preferably controllable negative pressures in the suction zones of the suction box can be adjusted in such a way that at least 70 and at most 95% of the amount of pulp suspension supplied to the head box is dewatered with the suction box.
  • the suction box can have a suction box covering comprising strips and / or panels, in order to sufficiently take into account different aspects, such as functional safety, freedom from marking in the fibrous web to be produced, and the like.
  • a Saugkastenbelag is technologically mature due to its diverse use in the production of fibrous webs of different qualities and also low in the purchase and operation.
  • the curved upper lip of the headbox can be positioned on the upstream side independently of or largely independent of the preferably straight front wall of the headbox, it is preferably connected to it by means of at least one rotary joint.
  • the swivel joint can be sectioned over the width of the headbox in a known manner and the curvature of the upper lip at least substantially corresponds to the diameter of the Saugformierwalze.
  • the curved upper lip of the headbox and the preferably straight front wall of the headbox can be individually positioned from each other. It can also be provided that the curved upper lip of the headbox and the preferably straight front wall of the headbox are lifted together by means of a quick lift of the sieve.
  • the at least one headbox is preferably arranged such that in the region of the at least one drainage element it preferably applies the pulp suspension completely to the top side of the sieve.
  • an at least small, preferably process-technologically sufficient dewatering of the topside applied to the screen pulp suspension is given.
  • FIG. 1 shows a schematic side view of a Schrägsiebformers 1 of a machine for producing a fibrous web 2, in particular a long fiber paper or wet nonwoven web, from at least one pulp suspension.
  • the Schrägsiebformer 1 has a sieve loop 5 forming sieve 4, which runs over a peripheral region 7 of a breast roll 6 and then in the wire direction S (arrow) at least in sections at an angle ⁇ obliquely to the horizontal H.
  • the angle ⁇ assumes a value of approximately + 20 ° to the horizontal. It brings in this oblique stretch section 8 of the screen 4, a front wall 10 having and merely indicated headbox 9, the pulp suspension 3 on the top of the sieve 4 and on the underside a drainage element 11 is arranged for dewatering the top of the sieve 4 applied pulp suspension 3.
  • the headbox 9 is arranged such that it applies in the region of the dewatering element 11, the full pulp suspension 3 on the top of the sieve 4, the front wall 10 of the headbox 9 thus ends in the end region of the dewatering element 11 and thus forms an outlet gap A.
  • the dewatering element 11 could also go beyond the application area of the headbox 9.
  • a guide roll 14 may be formed as a wire-width stretch roll known in the art.
  • a plurality of, in the present embodiment, two known to those skilled slot suction 15 for further increase in dry content in the fibrous web 2 to be produced are arranged.
  • web speeds v (arrow) of up to 600 m / min can be achieved.
  • the dewatering element 11 is in the embodiment according to the FIG. 1 So, according to the prior art, a suction box 16, the S in the direction S (arrow), for example, six suction zones Z 16.1 to Z 16.6 .
  • the number of suction zones Zn of the suction box 16 generally moves between 4 and 8, preferably between 5 and 7.
  • the suction zones Z 16.1 to Z 16.6 of the illustrated suction box 16 can be acted upon by at least two different subpressures U 17.1 , U 17.2 , that of two separate negative pressure sources 17.1, 17.2 (arrows) for the zones Z 16.1 , Z 16.3 , Z 16.5 and Z 16.2 , Z 16.4 , Z 16.6 are generated.
  • the vacuum sources 17.1, 17.2 can be designed, for example, as preferably controllable / controllable vacuum pumps. Of course, only a vacuum source may be present, which preferably engages in the lower region of the suction box.
  • the drawn in the suction box 16 from the pulp suspension 3 white water 18 (arrow) is by means of a white water drain off and the known white water circuit fed. Also, instead of a single suction box 16 several successively arranged suction boxes may be present.
  • the suction box 16 is provided on the upper side with a strip covering 19, but it can of course also have a known plate covering.
  • FIG. 2 shows a schematic side view of a first embodiment according to the invention of a Schrägsiebformers 1 of a machine for manufacturing a fibrous web 2. Since the basic structure of this Schrägsiebformers 2 in large parts of the basic structure of in the FIG. 1 shown and described Schrägsiebformers 1, reference is hereby made to its description.
  • the Schrägsiebformer 1 of this figure on the dewatering element immediately downstream slotted vacuum cleaner for further increase in dry content of up to 5% in the fibrous web 2 to be produced.
  • the dewatering element 11 is followed by a suction forming roll 20 arranged in the wire loop 5 of the wire 4, which has both a roll diameter D 20 in the range of 800 to 1,500 mm, preferably 900 to 1,450 mm, in particular 1,000 to 1,400 mm, and at least one having a preferably controllable / controllable negative pressure acted upon suction zone.
  • the Saugformierwalze 20 has two each with a preferably regulable / controllable vacuum U 20.1 , U 20.2 acted upon suction zones Z 20.1 , Z 20.2 . Furthermore, at least one suction zone Z 20.1 , Z 20.2 of the suction forming roller 20 is completely covered (suction zone Z 20.1 ) or partially (suction zone Z 20.2 ) by a top lip 22 arranged on the front wall 10 of the headbox 9. In addition, the suction forming roll 20 may be driven or driven as shown, depending on use.
  • the suction forming roll 20 has a suction roll shell 23 having an open area F 23 in the range of 40 to 80%, preferably 50 to 75%.
  • the Saugformierwalze 20 of the in FIG. 2 Schrägsiebformers 1 thus replaced also the guide or buckling roller 12 of the in the FIG. 1 shown Schrägsiebformers. 1
  • the curved upper lip 22 of the headbox 9 is connected by means of at least one rotary joint 24 with the preferably straight front wall 10 of the headbox 9, so that the curved upper lip 22 of the headbox 9 and the preferably straight front wall 10 of the headbox 9 are individually positioned.
  • the web width optionally also sectioned positioning
  • the curved upper lip 22 of the headbox 9 by means of a positioning device 25, for example by means of a shown and at least one lifting spindle 27 comprehensive lifting device 26.
  • the two directions of movement of the lifting device are indicated by a double arrow.
  • the curved upper lip 22 of the headbox 9 and the preferably straight front wall 10 of the headbox 9 can be lifted together by means of a quick lift of the sieve 4.
  • the rapid lifting takes place, for example, by means of a lifting device 28 which is shown and which comprises at least one lifting cylinder 29.
  • the two directions of movement of the lifting device are indicated by means of a double arrow.
  • the dewatering element 11 is in the embodiment according to the FIG. 2 in turn, a suction box 30, the S in the direction S (arrow), for example, seven suction zones Z 30.1 to Z 30.7 .
  • the preferably controllable negative pressures U 31.1 to U 31.3 in the suction zones Z 30.1 to Z 30.7 of the suction box 30 assume different values in the range from 0.1 to 0.7 bar, preferably from 0.2 to 0.6 bar .
  • the vacuum sources 31.1 to 31.3 (arrows) required for this purpose can be designed, for example, as preferably controllable / controllable vacuum pumps.
  • the white water removed in the region of the suction box 30 from the pulp suspension 3 is removed by means of a white water drain and fed to the known white water circuit.
  • the illustrated embodiment is merely exemplary in nature. Of course, other embodiments with regard to the number of different negative pressures, together with vacuum applied suction zones and the like possible.
  • the preferably controllable negative pressures U 30.1 to U 30.3 in the suction zones Z 30.1 to Z 30.7 of the suction box 30 are adjustable so that with the suction box 30 at least 70 and a maximum of 95% of the headbox 9 supplied amount of pulp suspension 3 dehydrates becomes.
  • the angle ⁇ to the horizontal H usually takes a value in the range of 0 to 45 °, preferably from 5 to 30 °, in particular from 10 to 20 °, and the suction box 30 is also provided on the upper side with a last covering 32, but it can of course have a known plate covering.
  • FIG. 3 now shows a simplified detailed view of the Saugformierwalze 20 of the in the FIG. 2 shown Schrägsiebformers 1 a machine for producing a fibrous web. 2
  • the Saugformierwalze 20 has, as already stated, a roller diameter D 20 in the range of 800 to 1,500 mm, preferably from 900 to 1,450 mm, in particular from 1,000 to 1,400 mm, as well as two, each with a preferably controllable / controllable negative pressure U 20.1 , U 20.2 acted upon suction zones Z 20.1 , Z 20.2 on.
  • the respective negative pressure U 20.1 , U 20.2 in the corresponding suction zone Z 20.1 , Z 20.2 of the Saugformierwalze 20 assumes a value in the range of 0.1 to 0.8 bar, preferably from 0.2 to 0.5 bar, wherein the Negative pressures U 20.1 , U 20.2 increase in the direction of sweep S (arrow).
  • the two acting on the Saugformierwalze 20 subpressures U 20.1 , U 20.2 are adjustable so that with the Saugformierwalze 20 at least 5 and a maximum of 30% of the headbox 9 ( FIG. 2 ) is dewatered amount of pulp suspension 3.
  • the two suction zones Z 20.1 , Z 20.2 are acted upon by two vacuum sources 21.1, 21.2 (arrows).
  • the first suction zone Z 20.1 of the suction forming roller 20 is in the direction of the direction of the wire flow S (arrow), and the second suction zone Z 20.2 in the direction of the wire flow S (arrow) is partially replaced by the one on the front wall 10 of the headbox 9 (FIG. FIG. 2 ) arranged and curved upper lip 22 is covered, which is connected by means of at least one rotary joint 24 with the preferably straight front wall 10 of the headbox 9.
  • the suction roll shell 23 of the suction forming roll 20 has an open area F 23 in the range of 40 to 80%, preferably 50 to 75%, and may comprise a illustrated honeycomb cylinder 33, coarse mesh fabric or wrapping wire spiral. And between the strip covering 32 of the suction box 30 and the Saugformierwalze 20 a sealing strip 36 is arranged.
  • FIG. 4 shows a schematic side view of a second embodiment according to the invention Schrägsiebformers a machine 1 for producing a fibrous web 2. Since the basic structure of this Schrägsiebformers 2 in large parts of the basic structure of the in FIG. 2 shown and described Schrägsiebformers 1, reference is hereby made to its description.
  • Schrägsiebformer 1 Unlike the one in the FIG. 2 Schrägsiebformer 1 shown assumes the angle ⁇ to the horizontal H in this illustrated Schrägsiebformer 1 a value in the range of 0 °, that is, the stretch section 8 after the breast roll 6 is horizontal. As a result, the structure and thus the appearance of the frame 34 of the Schrägsiebformers 1 changes accordingly.
  • FIG. 5 shows a schematic side view of a third embodiment according to the invention of a Schrägsiebformers 1 of a machine for producing a fibrous web 2. Since the basic structure of this Schrägsiebformers 2 in many parts of the basic structure of in the FIG. 2 shown and described Schrägsiebformers 1, reference is hereby made to its description.
  • the headbox is designed as a multi-layer headbox 9.1, especially as a three-layer headbox, wherein the delamination between two adjacent layers is effected by a flexibly arranged separating element 35.
  • the single separator 35 may be made of a stainless steel or the like and have a minimum rigidity both in the machine direction and in the machine direction Have cross-machine direction, the area assumes at least a value ⁇ 40 N / mm.
  • this multi-layer casserole 9.1 as well as each in the Figures 2 and 4 Headbox 9 shown have a sectioned fabric density control for at least one layer. Such a sectioned consistency control is, for example, in the German patent DE 40 19 593 C2 shown and described.
  • a Schrägsiebformer of the aforementioned type is provided by the invention, which avoids the disadvantages of the prior art as far as possible, preferably even completely avoided.
  • the production of a high-quality fibrous web is made possible at significantly higher web speeds and at the same time the runnability of the inclined wire former is markedly increased.

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  • Paper (AREA)
EP09153689A 2008-02-28 2009-02-26 Dispositif de moulage à tamis oblique d'une machine destinée à la fabrication d'une bande de matière fibreuse à partir d'au moins une suspension de matière fibreuse Not-in-force EP2096207B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008000435A DE102008000435A1 (de) 2008-02-28 2008-02-28 Schrägsiebformer einer Maschine zur Herstellung einer Faserstoffbahn aus mindestens einer Faserstoffsuspension

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EP2096207A1 true EP2096207A1 (fr) 2009-09-02
EP2096207B1 EP2096207B1 (fr) 2010-12-08

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EP09153689A Not-in-force EP2096207B1 (fr) 2008-02-28 2009-02-26 Dispositif de moulage à tamis oblique d'une machine destinée à la fabrication d'une bande de matière fibreuse à partir d'au moins une suspension de matière fibreuse

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EP (1) EP2096207B1 (fr)
AT (1) ATE491066T1 (fr)
DE (2) DE102008000435A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3118361A1 (fr) * 2015-07-14 2017-01-18 Trützschler GmbH & Co. KG Installation et procede de fabrication d'un voile multicouche a partir d'au moins un voile de carde non encolle
EP4067548B1 (fr) 2021-03-29 2023-03-22 Andritz Küsters GmbH Installation de consolidation des couches comprenant des fibres en une bande de non-tissée
EP4328376A1 (fr) * 2022-08-22 2024-02-28 Voith Patent GmbH Formeur à tamis oblique

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3440138A (en) * 1965-10-19 1969-04-22 Sandy Hill Corp High speed web forming machine
DE4019593C2 (de) 1990-06-20 1994-01-20 Voith Gmbh J M Stoffauflauf für Papiermaschinen
DE102004047518A1 (de) 2004-09-28 2006-03-30 Voith Paper Patent Gmbh Verfahren und Schrägsiebformer einer Maschine zur Herstellung einer Faserstoffbahn aus mindestens einer Faserstoffsuspension

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3440138A (en) * 1965-10-19 1969-04-22 Sandy Hill Corp High speed web forming machine
DE4019593C2 (de) 1990-06-20 1994-01-20 Voith Gmbh J M Stoffauflauf für Papiermaschinen
DE102004047518A1 (de) 2004-09-28 2006-03-30 Voith Paper Patent Gmbh Verfahren und Schrägsiebformer einer Maschine zur Herstellung einer Faserstoffbahn aus mindestens einer Faserstoffsuspension

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3118361A1 (fr) * 2015-07-14 2017-01-18 Trützschler GmbH & Co. KG Installation et procede de fabrication d'un voile multicouche a partir d'au moins un voile de carde non encolle
CN106350944A (zh) * 2015-07-14 2017-01-25 特吕茨施勒有限及两合公司 用于由至少一个未固着的纤维网制造多层的无纺织物的设备和方法
CN106350944B (zh) * 2015-07-14 2018-11-09 特吕茨施勒有限及两合公司 用于由至少一个未固着的纤维网制造多层的无纺织物的设备和方法
EP4067548B1 (fr) 2021-03-29 2023-03-22 Andritz Küsters GmbH Installation de consolidation des couches comprenant des fibres en une bande de non-tissée
US12043933B2 (en) 2021-03-29 2024-07-23 Andritz Kuesters Gmbh System for bonding layers comprising fibers to form a nonwoven web
EP4328376A1 (fr) * 2022-08-22 2024-02-28 Voith Patent GmbH Formeur à tamis oblique

Also Published As

Publication number Publication date
DE502009000221D1 (de) 2011-01-20
EP2096207B1 (fr) 2010-12-08
ATE491066T1 (de) 2010-12-15
DE102008000435A1 (de) 2009-09-03

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