EP0223734B1 - Procédé de fabrication d'une nappe de filaments et appareil pour la mise en oeuvre du procédé - Google Patents

Procédé de fabrication d'une nappe de filaments et appareil pour la mise en oeuvre du procédé Download PDF

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Publication number
EP0223734B1
EP0223734B1 EP86730191A EP86730191A EP0223734B1 EP 0223734 B1 EP0223734 B1 EP 0223734B1 EP 86730191 A EP86730191 A EP 86730191A EP 86730191 A EP86730191 A EP 86730191A EP 0223734 B1 EP0223734 B1 EP 0223734B1
Authority
EP
European Patent Office
Prior art keywords
thread
nozzle
compressed air
tube
thread discharge
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.)
Expired - Lifetime
Application number
EP86730191A
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German (de)
English (en)
Other versions
EP0223734A2 (fr
EP0223734A3 (en
Inventor
Kurt Mente
Gerhard Knitsch
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.)
JH Benecke GmbH
Corovin GmbH
Original Assignee
JH Benecke GmbH
Corovin 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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6286443&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0223734(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by JH Benecke GmbH, Corovin GmbH filed Critical JH Benecke GmbH
Priority to AT86730191T priority Critical patent/ATE67800T1/de
Publication of EP0223734A2 publication Critical patent/EP0223734A2/fr
Publication of EP0223734A3 publication Critical patent/EP0223734A3/de
Application granted granted Critical
Publication of EP0223734B1 publication Critical patent/EP0223734B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
    • D04H3/03—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments at random
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S239/00—Fluid sprinkling, spraying, and diffusing
    • Y10S239/07—Coanda

Definitions

  • the invention relates to a method for producing a nonwoven from continuous filaments according to the preamble of claim 1.
  • the invention also relates to a device for carrying out the method.
  • Laval extension At the narrowest annular gap of the thread take-off nozzle is the so-called Laval extension, at the outlet of which a negative pressure is generated. This negative pressure is also established at the inlet of the thread take-off nozzle via an inner thread-guiding tube and enables thread threading.
  • the laval extension is followed by a thread extraction tube with the inner diameter of the laval extension, into which air flows in at supersonic speed.
  • a compression shock occurs with a subsequent subsonic flow, which further slows down in a subsequent thread guide tube with four to six times the cross-section.
  • the threads are drawn, which thereby become thinner.
  • the main part of the thread pulling force for stretching the threads is applied by the thread pulling tube.
  • the thread guide tube only has the task of transporting the thread sheet to a spreading nozzle and, where appropriate, to so-called Coanda shells in order to distribute and spread the threads evenly before they meet a base to form the fleece.
  • the invention intervenes, which is based on the object of creating a method which, while maintaining the required thread pulling force, nevertheless enables a reduction in costs with regard to the required energy requirement.
  • the invention is intended to provide a device for carrying out such a method.
  • the method provided in the preamble of claim 1 provides that a gaseous propellant with lower pressure and volume is also supplied in the region of the outlet of the thread take-off device by means of an additional thrust nozzle, and that the inlet pressure and the inlet volume are simultaneously reduced.
  • the invention therefore takes the surprising route of additionally providing a thrust nozzle for feeding in with compressed air energy.
  • the invention is based on the knowledge that a reduction in the compressed air energy supplied to the thread draw-off nozzle can be carried out at the same time, while maintaining the original thread draw-off force.
  • the energy saving at the thread take-off nozzle is greater than the energy additionally required at the thrust nozzle, so that overall energy savings and cost savings are achieved. Experiments have shown that considerable energy savings of almost 30% can be achieved.
  • Another serious advantage of the invention is that this energy saving device is achieved in a simple manner by merely between the lower end of the thread guide tube and the expanding nozzle one component - namely a thruster - is used.
  • the dimensions and dimensions of the thread guide tube can be freely selected as long as the flow resistance of 1 kPa (0.01 bar) is not exceeded.
  • the invention enables a reduction in the compressed air pressure p 1 in front of the thread withdrawal nozzle from 2100 to 1600 kPa and a reduction in the amount of air V 1 from 72 to 52.4 m3 / h with the same thread pulling force.
  • p2 190 kPa
  • Another advantage of the invention is that the thrust nozzle enables the thread guide tube to be shortened, the flow resistance of which is thus reduced. If the total flow resistance of the take-off device is observed, the length / diameter ratios already mentioned above can be achieved by lengthening the thread take-off tube.
  • filaments 10 are drawn in in the direction of arrow A by a thread draw-off nozzle 12 known per se.
  • the continuous filaments 10 are obtained in a conventional manner from a melt and passed through spinnerets, not shown in the drawing.
  • the thread take-off nozzle 12 has a compressed air connection 14 for supplying a quantity of compressed air V 1 under the pressure p 1.
  • a thread take-off tube 16 connects to the thread take-off nozzle 12, and a thread guide tube 20 is connected via a transition cone 18.
  • the continuous threads 10 drawn off emerge at the bottom from an expansion nozzle 26 which is provided with Coanda shells 28.
  • Coanda effect is used to spread the threads 30 before they hit an air-permeable, sieve conveyor belt 32 which is under vacuum, whereby the fleece is formed.
  • the thread take-off force is generated predominantly in the thread take-off tube 16 which is flowed through at the supersonic speed in the first half and at the subsonic speed after the compression stroke.
  • the threads reach speeds of 30 to 100 m / s depending on the size of the thread titer.
  • the flow resistance is kept low by the transition cone 18 located between the thread draw-off tube 16 and the thread guide tube 20 and having a cone angle of less than 8 °. The device described so far is known.
  • the thread guide tube 20 conveys the thread family to an existing thrust nozzle 22 in the new device, which is arranged between the thread guide tube 20 and the expanding nozzle 26 and has a compressed air connection 24, via which a quantity of air V2 is supplied at a low pressure p2.
  • the thread guide tube 20 is dimensioned so that the flow resistance is less than 1 kPa (0.01 bar).
  • Fig. 2 the detailed structure of the thrust nozzle 22 is shown, which is welded to the thread guide tube 20.
  • the thrust nozzle 22 comprises a first threaded part 34 which is screwed to a second threaded part 38 and is secured against rotation by a cylindrical pin 36.
  • the first threaded part 34 and the second threaded part 38 form a pipe extension 40.
  • a rotatable one Adjustment ring 42 which can be moved in the axial direction by rotation, as well as a jacket 48 and a conical transition piece 50, which is welded to the inlet of the expansion nozzle 26.
  • a prechamber 52 connects to the compressed air connection 24 already shown in FIG. 1 and is connected to a storage space 56 via bores 54.
  • the inner wall of the adjustment ring 42 forms a feed in the form of a lava extension 46 with an air outlet 44 from the storage space 56 to the thread guide space 60.
  • the narrowest cross-section is designated by reference numeral 58, and L indicates the length of the Laval extension 46.
  • the length L of the Laval extension 46 can be influenced by turning the adjusting ring 42.
  • the jacket 48 and the first threaded part 34 are fixed axially and radially.
  • the compressed air V2; p2 flows through the compressed air connection 24 into the pre-chamber 52 and through the holes 54 in the storage space 56 and then through the narrowest cross-section 58 to the air outlet 44 or to the Laval extension 46.
  • the second threaded part 38 is flared at its end or outlet and the conical transition piece at its inlet.
  • the diameter of the thread take-off tube 16 is denoted by d 1 and the length by l 1, while d 2 and l 2 indicate the diameter or the length of the thread guide tube 20.
  • the length / diameter ratios can be varied by switching on the thrust nozzle 22.
  • the ratio l1 / d1 is about 110 to achieve an optimal thread pulling force.
  • the thread guide tube 20 largely determines the flow resistance, and here the ratio l2 / d2 is chosen so that the flow resistance mentioned above results in less than 0.01 bar.
  • the ratio l2 / d2 is chosen so that the flow resistance mentioned above results in less than 0.01 bar.
  • other values are also possible for the conditions mentioned within the scope of the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Claims (15)

  1. Procédé de fabrication d'une nappe de filaments continus (10), extraits à grande vitesse, sous l'influence d'un agent propulseur sous forme de gaz, à la sortie de filières en nappes de filaments, et déposés, après avoir traversé un dispositif d'extraction de filaments tubulaire (16, 20), sur un support (32) pour la formation de la nappe, l'agent propulseur sous forme de gaz étant, sous une pression d'entrée déterminée (P₁) (pression d'air comprimé) et un volume d'entrée déterminé (V₁) (quantité d'air comprimé) amené à une filière d'extraction de filaments (12) se trouvant à l'entrée du dispositif d'extraction de filaments (16, 20), pour produire la force d'extraction de filaments souhaitée, caractérisé en ce qu'un agent propulseur sous forme de gaz, sous une faible pression (P₂) et un faible volume (V₂), est également amené, au moyen d'une filière de poussée complémentaire (22), dans la zone de la sortie du dispositif d'extraction de filaments (16, 20) et en ce que la pression d'entrée (P₁) et le volume d'entrée (V₁) sont simultanément réduits.
  2. Procédé suivant la revendication 1, caractérisé en ce que la pression (P1) et le volume d'entrée (V₁) sont réduits et le rapport longueur/diamètre (l₁/d₁; l₂/d₂) du tube d'extraction de filaments (16) formant le dispositif d'extraction de filaments, et du tube de guidage de filaments (20) choisi de manière que la force d' extraction de filaments existant sans l'amenée complémentaire d'agent propulseur soit conservée.
  3. Procédé suivant la revendication 2, caractérisé en ce que le rapport longueur/diamètre (l₁/d₁) du tube d'extraction de filaments (16) se situe entre les valeurs 80 et 180.
  4. Procédé suivant une des revendications précédentes 1 à 3, caractérisé en ce que le rapport de la pression de la pression d'entrée absolue (P1) à la filière d'extraction de filaments (12), à la pression (P2), à la filière de poussée (22), est choisi plus grand que la valeur 3.
  5. Procédé suivant une des revendications précédentes 1 à 4, caractérisé en ce que les filaments continus (10) passent de la filière de poussée à une filière d'écartement (26) comprenant des surfaces Coanda afin d'écarter les filaments (30) avant qu'ils soient déposés sur le support (32).
  6. Dispositif de mise en oeuvre du procédé, comprenant une filière d'extraction de filaments débouchant dans un tube d'extraction de filaments, auquel est raccordé un tube de guidage de filaments qui est relié à une filière d'écartement, caractérisé en ce qu'une filière de poussée (22) est à l'extrémité du tube de guidage de filaments tournée vers la filière d'écartement (26) et en ce que la filière de poussée (22) débouche dans la filière d'écartement (26).
  7. Dispositif suivant la revendication 6, caractérisé en ce que la filière de poussée (22) présente un élargissement réglable de Laval (46).
  8. Dispositif suivant une des revendications précédentes 6 à 7, caractérisé en ce que la filière de poussée (22) est, au moyen d'assemblages par vis, disposé entre le tube de guidage de filaments (20) et la filière d'écartement (26).
  9. Dispositif suivant une des revendications précédentes 6 à 8, caractérisé en ce que le rapport longueur/diamètre (l₁/d₁) du tube d'extraction de filaments (16) se situe entre 80 et 180.
  10. Dispositif suivant une des revendications précédentes 6 à 9, caractérisé en ce qu'un cône de raccordement (18), entre le tube d'extraction de filaments (16) et le tube de guidage de filaments, possède un angle au sommet de moins de 8°.
  11. Dispositif suivant une des revendications précédentes 6 à 10, caractérisé en ce que la filière de poussée (22) possède un raccordement d'air comprimé (24), raccordé à une préchambre (52) qui est reliée, par des trous (54), à une chambre de retenue (56).
  12. Dispositif suivant la revendication 11 caractérisé en ce que la chambre de retenue (56) débouche, avec une section rétrécie (58), dans une chambre tubulaire de guidage des filaments (60), à laquelle est raccordée la filière d'écartement (26).
  13. Dispositif suivant la revendication 12, caractérisé en ce que la chambre de guidage de filaments (60) débouche en passant par un élément conique de raccordement (50), dans la filière d'écartement (26).
  14. Dispositif suivant une des revendications précédentes 7 à 13, caractérisé en ce que la filière de poussée (22) possède une bague de réglage interne (42), déplaçable par rotation, dans le sens axial, ce qui permet de modifier l'élargissement de Laval (46).
  15. Dispositif suivant une des revendications précédentes 6 à 14, caractérisé en ce que les dimensions du tube de guidage des filaments (20) sont choisies de manière que la résistance à l'écoulement est inférieure à 0,01 bar.
EP86730191A 1985-11-21 1986-11-21 Procédé de fabrication d'une nappe de filaments et appareil pour la mise en oeuvre du procédé Expired - Lifetime EP0223734B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86730191T ATE67800T1 (de) 1985-11-21 1986-11-21 Verfahren zur herstellung eines vlieses aus endlosfaeden und vorrichtung zur durchfuehrung des verfahrens.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3541128 1985-11-21
DE19853541128 DE3541128A1 (de) 1985-11-21 1985-11-21 Verfahren zur herstellung eines vlieses aus endlosfaeden und vorrichtung zur durchfuehrung des verfahrens

Publications (3)

Publication Number Publication Date
EP0223734A2 EP0223734A2 (fr) 1987-05-27
EP0223734A3 EP0223734A3 (en) 1989-03-15
EP0223734B1 true EP0223734B1 (fr) 1991-09-25

Family

ID=6286443

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86730191A Expired - Lifetime EP0223734B1 (fr) 1985-11-21 1986-11-21 Procédé de fabrication d'une nappe de filaments et appareil pour la mise en oeuvre du procédé

Country Status (6)

Country Link
US (2) US4847035A (fr)
EP (1) EP0223734B1 (fr)
JP (1) JPS62206072A (fr)
AT (1) ATE67800T1 (fr)
DE (2) DE3541128A1 (fr)
ES (1) ES2026463T3 (fr)

Families Citing this family (17)

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US5993943A (en) * 1987-12-21 1999-11-30 3M Innovative Properties Company Oriented melt-blown fibers, processes for making such fibers and webs made from such fibers
JP2887611B2 (ja) * 1990-01-27 1999-04-26 三井化学株式会社 不織布の製造方法及び装置
CA2038164C (fr) * 1990-03-14 1999-02-09 Keiji Kobayashi Pistolet pneumatique pour la production de tissu non tisse et appareil de production connexe
JP2842677B2 (ja) * 1990-08-27 1999-01-06 三井化学株式会社 不織布製造用エアガン
US5421064A (en) * 1991-04-09 1995-06-06 Mitsui Petrochemical Industries, Ltd. Filaments dispersing device
DE4414277C1 (de) * 1994-04-23 1995-08-31 Reifenhaeuser Masch Nach dem Ruhedruckprinzip arbeitende Spinnvliesanlage für die Herstellung einer Nonwoven-Spinnvliesbahn
US5667749A (en) * 1995-08-02 1997-09-16 Kimberly-Clark Worldwide, Inc. Method for the production of fibers and materials having enhanced characteristics
US5711970A (en) * 1995-08-02 1998-01-27 Kimberly-Clark Worldwide, Inc. Apparatus for the production of fibers and materials having enhanced characteristics
US5811178A (en) * 1995-08-02 1998-09-22 Kimberly-Clark Worldwide, Inc. High bulk nonwoven sorbent with fiber density gradient
WO1997022822A1 (fr) * 1995-12-15 1997-06-26 Kimberly-Clark Worldwide, Inc. Soupape rotative a grande vitesse pour hautes temperatures
US6013223A (en) * 1998-05-28 2000-01-11 Biax-Fiberfilm Corporation Process and apparatus for producing non-woven webs of strong filaments
US7018188B2 (en) * 2003-04-08 2006-03-28 The Procter & Gamble Company Apparatus for forming fibers
CN101636529B (zh) * 2007-01-19 2011-05-11 欧瑞康纺织有限及两合公司 用于铺放合成纤维以形成无纺织网的设备和方法
US20080217422A1 (en) * 2007-03-09 2008-09-11 Daniel Elden Near Nozzle assembly, delivery system and method for conveying insulation material
WO2011019982A1 (fr) 2009-08-14 2011-02-17 The Procter & Gamble Company Ensemble filière de filature et procédé de formation de fibres au moyen de cet ensemble
US20110076907A1 (en) * 2009-09-25 2011-03-31 Glew Charles A Apparatus and method for melt spun production of non-woven fluoropolymers or perfluoropolymers
CN102560705B (zh) * 2012-01-13 2014-12-03 常州惠明精密机械有限公司 纺粘无纺布纺丝下拉伸装置

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Also Published As

Publication number Publication date
DE3541128A1 (de) 1987-05-27
EP0223734A2 (fr) 1987-05-27
ATE67800T1 (de) 1991-10-15
US4847035A (en) 1989-07-11
DE3541128C2 (fr) 1989-08-17
EP0223734A3 (en) 1989-03-15
JPS62206072A (ja) 1987-09-10
US4964197A (en) 1990-10-23
JPH0140142B2 (fr) 1989-08-25
ES2026463T3 (es) 1992-05-01
DE3681692D1 (de) 1991-10-31

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