EP2085504B1 - Suction apparatus for transferring a nonwoven web - Google Patents

Suction apparatus for transferring a nonwoven web Download PDF

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Publication number
EP2085504B1
EP2085504B1 EP08002004A EP08002004A EP2085504B1 EP 2085504 B1 EP2085504 B1 EP 2085504B1 EP 08002004 A EP08002004 A EP 08002004A EP 08002004 A EP08002004 A EP 08002004A EP 2085504 B1 EP2085504 B1 EP 2085504B1
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EP
European Patent Office
Prior art keywords
cylinder
nonwoven web
unit
air
suction
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.)
Active
Application number
EP08002004A
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German (de)
English (en)
French (fr)
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EP2085504A1 (en
Inventor
Galliano Boscolo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Albis SpA
Original Assignee
Albis SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Albis SpA filed Critical Albis SpA
Priority to DE602008004077T priority Critical patent/DE602008004077D1/de
Priority to PL08002004T priority patent/PL2085504T3/pl
Priority to EP08002004A priority patent/EP2085504B1/en
Priority to DK08002004.3T priority patent/DK2085504T3/da
Priority to AT08002004T priority patent/ATE492667T1/de
Publication of EP2085504A1 publication Critical patent/EP2085504A1/en
Application granted granted Critical
Publication of EP2085504B1 publication Critical patent/EP2085504B1/en
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/02—Carding machines
    • D01G15/12—Details
    • D01G15/46—Doffing or like arrangements for removing fibres from carding elements; Web-dividing apparatus; Condensers
    • D01G15/465—Doffing arrangements for removing fibres using, or cooperating with, pneumatic means
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving

Definitions

  • the invention relates to a suction apparatus for transferring a nonwoven web between an upstream device and a downstream device.
  • the invention is particularly, but not exclusively, applicable for taking off and transferring a nonwoven web from a conveyor belt to a downstream unit, such as for example a bonding unit.
  • nonwoven web refers to any fibres and/or filaments web manufactured in the nonwoven industry, independently of the method of manufacturing said web and of the fibres or filaments type.
  • the web can be a monolayer web or a multilayer web made from several layers of fibres or filaments.
  • the nonwoven web can be made of one or more layers selected form the group: carded nonwoven layer, spunbonded nonwoven layer, meltblown nonwoven layer, air-laid nonwoven layer.
  • One layer of the web can be also an absorbent layer made from a fibre material generally referred as "pulp", and made of or containing fibres from natural sources such as woody and non-woody plants. Woody plants include, for example, deciduous and coniferous trees.
  • Non-woody plants include, for example, cotton, flax, esparto grass, milkweed, straw, jute hemp, and bagasse.
  • all the layers can be of the same type, or the nonwoven can be composite, that is to say made of several layers of different types such as for example a CMC nonwoven web (Carded layer / Meltblown layer / Carded layer), a SMS nonwoven web (Spunbonded layer / Meltblown layer / Spunbonded layer), a SPC nonwoven web (Spunbonded layer / Pulp layer / Carded layer), ...
  • a nonwoven web generally undergoes one or more consolidation steps such as for example by thermal bonding, hydroentangting, needle bonding, chemical bonding, ultrasonic bonding.
  • nonwoven web refers generally either to a non-consolidated web or to a consolidated web (i.e. after bonding).
  • a suction cylinder is used for taking off a nonwoven from an upstream conveyor belt and for transferring the nonwoven web to a downstream calendering unit. During its transfer, the nonwoven web adheres by suction against a lower portion of the suction cylinder.
  • the suction cylinder described in this publication comprises a rotating and perforated cylinder and suction means.
  • the suction means comprise a stationary internal suction chamber mounted inside the cylinder, and blowing means mounted outside the cylinder and used for sucking air from the internal chamber.
  • the internal chamber is constituted by an air pipe or duct, extending on the whole length of the cylinder and having a longitudinal bottom slot, and two stationary partitions extending from each side of the said slot. The two partitions define an internal suction sector.
  • the internal air pipe or duct is connected at one extremity or at both extremities to air blowing means.
  • the volume of the internal duct is also limited by the geometry of the cylinder, which in turn prejudicially impairs the suction air flow, and thereby impairs the suction force applied on the nonwoven web.
  • One main objective of the invention is to provide a novel apparatus for transferring a nonwoven web between an upstream unit and a downstream unit and that overcomes the aforesaid drawbacks of the suction transfer apparatus of the prior art.
  • This apparatus for transferring of a nonwoven web comprises a rotating and air permeable cylinder and air suction means for creating a suction force through the cylinder in order to make a nonwowen web adhere against the surface of a first portion of the cylinder.
  • the air suction means comprise a stationary internal channel that is mounted inside the cylinder and extends between the said first portion and a second portion of the cylinder, and a suction hood that is mounted outside the cylinder and in the vicinity of the said second portion.
  • a nonwoven web W is taken off from an upstream unit 1 and transferred to a downstream unit 2 by means of a transfer apparatus 3 of the invention.
  • the upstream unit 1 is a conveyor belt that is used for conveying the nonwoven web W, and that comprises an endless belt 1a tensioned between rotating rollers. Only the downstream roller 1b is illustrated on figure 1 . In operation, this endless belt 1a is driven by said rollers in the direction indicated by arrow A.
  • This conveyor belt 1 is for example positioned at the output of a carding machine (not shown on figure 1 ), the nonwoven web being in that case a non-consolidated web made of one or several carded fibre layers.
  • the downstream unit is a thermal bonding unit 2, also called “calendering unit” and comprise two calendering cylinders 2a, 2b.
  • the cylinders Preferably, at least one of the cylinders is heated.
  • the upper cylinder 2a and the lower cylinder 2b are mounted along a same axis X which is substantially vertical, and rotate in opposite directions, indicated by arrows B and C.
  • the nonwoven web W is drawn and compressed between the two said calendering cylinders 2a, 2b. This nonwoven web is thus consolidated by mechanical compression and heat.
  • the invention is not limited to the use of a transfer apparatus 3 for transferring a nonwoven web between an upstream conveyor belt 1 and a downstream calendering unit 2, but can be more generally used for transferring a nonwoven web between any upstream unit 1 and any downstream unit 2, independently of the structure or function of theses units.
  • This nonwoven web W is not necessarily a carded web, but can be any known monolayer or multilayer nonwoven web.
  • the transfer apparatus 3 comprises a rotating and air permeable cylinder 30, for example a perforated cylinder, and air suction means 31.
  • the cylinder 30 is positioned between the conveyor belt 1 and the calendering unit 2, in vicinity of the downstream roller 1b. In operation, the cylinder is rotated in the direction indicated by arrow D. In another variant, the cylinder 30 can be positioned closer to the cylinder 2b of the calendering unit 2, as disclosed in European patent application EP 0 733 729 .
  • the air suction means 31 comprise a stationary air channel 310 positioned inside the cylinder 30 and a suction hood 311 mounted outside the cylinder 30.
  • the air channel 310 extends in the direction perpendicular to figure 1 along substantially the whole length of the cylinder 30, and extends in the plan of figure 1 between two opposite portions of the cylinder 30, namely a bottom portion P1 referred therein as first portion, and an upper portion P2 referred therein as second portion.
  • the air channel 310 comprises two opposite air suction inlet 310c and air exhaust outlet 310d.
  • Air suction inlet 310c defines a suction sector extending in front the aforesaid first portion P1 of the cylinder 30.
  • Air exhaust outlet 310d is positioned opposite to the suction hood 311 and defines a discharge sector extending in front of the aforesaid second portion P2 of the cylinder 30.
  • this air channel 310 is delimited by two partitions 310a and 310b mounted inside the cylinder 30. More particularly, the two partitions 310a, 310b are held inside the cylinder 30 by two rods 32 that extend longitudinally in the hollow cylinder 30.
  • the transverse section of the air channel 310 formed by the two partitions 310a, 310b is preferably decreasing from the air suction inlet 310c towards a narrow section 310e ( figure 1 / distance d) and is preferably increasing from this narrow section 310e towards the air exhaust outlet 310d.
  • this narrow section 310e is obtained by using partition 310a, 310b that are constituted by two bended plates.
  • the air channel 310 comprises a narrow section 310e
  • this narrow section 310e is positioned substantially at the centre of the cylinder 30 as shown on figure 1 .
  • the invention is not limited to the used of rods 32 for fastening the partitions 310a, 310b inside the cylinder, but the partitions 310a, 310b may fastened inside the cylinder 30 by any fastening means known by one skilled in the art.
  • the air channel 310 is not necessary formed by two partitions 310a, 310b but can be formed by any other structure.
  • the transverse section or shape of the air channel 310 can also differ from the one shown on figure 1 .
  • the suction hood 311 is mounted outside the cylinder 30, in vicinity of the second portion P2 of the cylinder 30, and covers the said second portion P2.
  • the suction hood 311 extends preferably on substantially the whole length of the cylinder 30.
  • This suction hood 311 is connected to the suction inlet of at least one fan 312 by means of at least one duct 313 that is preferably positioned at the centre of the hood 311, or by means of several ducts 313 that are preferably regularly distributed on the whole length of the hood (i.e. on the whole length of the cylinder 30).
  • this nonwoven web W When a nonwoven web W is conveyed onto the conveyor belt 1, this nonwoven web W is taken off the belt and adheres against the first portion P1 of the cylinder 30 under the action of the suction force created through this portion P1, and is transferred thanks to the rotation of the cylinder 30 between the two calendering cylinders 2a, 2b, at a position downstream the suction portion P1.
  • the air flow through the whole surface of suction portion P1 of the cylinder can be better and easier controlled and adjusted.
  • a homogeneous air distribution can be obtained through the first suction portion P1, which enables to obtain a substantially constant suction force on the whole surface of first suction portion P1.
  • the nonwoven web W is thus correctly held on its whole width by this first portion P1 during its transfer to the downstream unit 2.
  • the air velocity, and thus the suction force applied on the nonwoven web can be easily adjusted to a sufficient level.
  • the transfer apparatus 3 of the invention can be efficiently used for transferring a nonwoven web W of large width, for example a nonwoven web having a width of 5m ore more, and/or for transferring a nonwoven web at high speed, for example at speed higher than 100 m/min.
  • the transfer apparatus 3 of the invention can be also advantageously used for transferring a nonwoven web W of width less than 5m, and/or for transferring a nonwoven web at speeds lower than 100 m/min.
  • the position of at least one partition, and more preferably of both partitions 310a, 310b, inside the cylinder 30 is adjustable, in order to adjust the dimension of the portions P1 and P2, and also the volume of the air channel 310.
  • the adjustment of the positions of the partitions 310a, 310b enable also to adjust the dimension of the narrow section 310e.
  • the fastening rods 32 are for example slidably movable inside the suction cylinder 30.
  • the position of the air channel 310 inside the cylinder is also adjustable, in order to adjust the positions of portions P1 and P2 on the periphery of the cylinder.
  • the suction hood 311 is preferably, but not necessarily, fixedly mounted above the suction cylinder 30, but its position may, in an alternative embodiment, be adjustable around the periphery of the cylinder 30.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
EP08002004A 2008-02-04 2008-02-04 Suction apparatus for transferring a nonwoven web Active EP2085504B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE602008004077T DE602008004077D1 (de) 2008-02-04 2008-02-04 Saugvorrichtung zum Überführen einer Vliesstoffbahn
PL08002004T PL2085504T3 (pl) 2008-02-04 2008-02-04 Urządzenie ssące do przenoszenia wstęgi włókniny
EP08002004A EP2085504B1 (en) 2008-02-04 2008-02-04 Suction apparatus for transferring a nonwoven web
DK08002004.3T DK2085504T3 (da) 2008-02-04 2008-02-04 Sugeindretning til at overføre et ikke-vævet lag
AT08002004T ATE492667T1 (de) 2008-02-04 2008-02-04 Saugvorrichtung zum überführen einer vliesstoffbahn

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08002004A EP2085504B1 (en) 2008-02-04 2008-02-04 Suction apparatus for transferring a nonwoven web

Publications (2)

Publication Number Publication Date
EP2085504A1 EP2085504A1 (en) 2009-08-05
EP2085504B1 true EP2085504B1 (en) 2010-12-22

Family

ID=39590706

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08002004A Active EP2085504B1 (en) 2008-02-04 2008-02-04 Suction apparatus for transferring a nonwoven web

Country Status (5)

Country Link
EP (1) EP2085504B1 (pl)
AT (1) ATE492667T1 (pl)
DE (1) DE602008004077D1 (pl)
DK (1) DK2085504T3 (pl)
PL (1) PL2085504T3 (pl)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8394316B2 (en) 2010-08-12 2013-03-12 Johnson & Johnson Do Brasil Industria E Comercio Produtos Para Saude Ltda. Rodovia Method for making a fibrous article
EP2417952B1 (en) * 2010-08-12 2017-08-02 Johnson & Johnson do Brasil Industria e Comercio de Produtos Para Saude Ltda. Method and apparatus for making a fibrous article
US8398915B2 (en) * 2010-08-12 2013-03-19 Johnson & Johnson do Brasil Industria e Comercio Produtos Paral Saude Ltda. Rodovia Method for making a fibrous article
US8480387B2 (en) * 2010-08-12 2013-07-09 Johnson & Johnson Do Brasil Industria E Comercio Produtos Para Saude Ltda. Apparatus for making a fibrous article having a three dimensional profile
EP2417951B1 (en) * 2010-08-12 2016-12-14 Johnson & Johnson do Brasil Industria e Comercio de Produtos Para Saude Ltda. Method and apparatus for making a fibrous article having a three dimensional profile and an absorbant article including a formed fibrous article
FR3059344B1 (fr) * 2016-11-25 2019-11-22 Andritz Asselin Thibeau Dispositif d'etirage d'un voile dispose entre un dispositif de carde et un etaleur nappeur
FR3081885B1 (fr) 2018-05-31 2020-09-11 Andritz Asselin Thibeau Systeme de formation d’une nappe de fibres
EP3908687B1 (fr) 2019-01-08 2023-05-31 ANDRITZ Perfojet SAS Installation et procede de production de non-tisses

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1255061A (fr) * 1960-01-21 1961-03-03 Perfectionnements aux briseurs des machines à carder
DE1510449A1 (de) 1965-11-26 1971-03-18 Tessiltecnica Di M Mealli Abnahmevorrichtung fuer eine Textilfaserbahn,insbesondere gekrempelter,garnettierter oder wiederaufbereiteter Fasern
DE2364346C3 (de) * 1973-12-22 1978-04-06 J.M. Voith Gmbh, 7920 Heidenheim Trockeneinrichtung für Papierbahnen o.dgl
FI54164C (fi) * 1977-07-08 1978-10-10 Nokia Oy Ab Foerfarande och anordning foer loestagning av en tissuepappersbana fraon pick-up-vaevnaden och foer dess oeverfoering till en genomstroemningstork
FR2732042B1 (fr) 1995-03-22 1997-06-13 Thibeau & Cie Sa A Cylindre aspirant permettant le transfert d'un voile fibreux entre un tapis de transport et deux cylindres de calandrage
DE19737514C2 (de) * 1997-08-28 2000-05-11 Spinnbau Gmbh Vlieskalander

Also Published As

Publication number Publication date
EP2085504A1 (en) 2009-08-05
PL2085504T3 (pl) 2011-05-31
DE602008004077D1 (de) 2011-02-03
ATE492667T1 (de) 2011-01-15
DK2085504T3 (da) 2011-04-04

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