WO1993024692A1 - Procede de fabrication de non-tisses, ainsi que plisseur transversal - Google Patents

Procede de fabrication de non-tisses, ainsi que plisseur transversal Download PDF

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Publication number
WO1993024692A1
WO1993024692A1 PCT/EP1993/001296 EP9301296W WO9324692A1 WO 1993024692 A1 WO1993024692 A1 WO 1993024692A1 EP 9301296 W EP9301296 W EP 9301296W WO 9324692 A1 WO9324692 A1 WO 9324692A1
Authority
WO
WIPO (PCT)
Prior art keywords
belt
angle
take
compensation
laying
Prior art date
Application number
PCT/EP1993/001296
Other languages
German (de)
English (en)
Inventor
Werner Richter
Original Assignee
Hergeth Hollingsworth 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 DE4217285A external-priority patent/DE4217285C1/de
Application filed by Hergeth Hollingsworth Gmbh filed Critical Hergeth Hollingsworth Gmbh
Publication of WO1993024692A1 publication Critical patent/WO1993024692A1/fr

Links

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
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/74—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being orientated, e.g. in parallel (anisotropic fleeces)
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G25/00—Lap-forming devices not integral with machines specified above

Definitions

  • the invention relates to a method for producing nonwoven fabrics according to the preamble of claim 1 and to a stacker according to the preamble of claim 5.
  • the fiber web delivered by the card or card is deposited in a zigzag shape on a take-off belt working transversely to the direction of the web with the aid of a cross-layer.
  • the angle between the individual pile layers results from the feed speed of the cards or cards and the take-off speed of the take-off belt.
  • the thickness of the paneled pile layers can be varied by changing the speed of the take-off belt while maintaining the feed speed of the fibrous web.
  • the known staplers have in common that the transfer of the batt to the take-off belt takes place with delivery rollers which are arranged at 90 ° to the feed direction of the batt and are moved back and forth in a horizontal plane across the width of the take-off belt.
  • delivery rollers which are arranged at 90 ° to the feed direction of the batt and are moved back and forth in a horizontal plane across the width of the take-off belt.
  • the laying angle which results from the relationship between the take-off speed of the take-off belt and the lay speed of the fiber web, approaches 90 °, which in practice can only be achieved when the take-off belt is at a standstill.
  • the delivery rolls of the stacker are arranged at 90 ° to the direction of feed of the fiber pile, in practice one can only place a finite number of layers with a usual working width ratio to the laying width of 1: 1 to 1: 6 if the fiber pile layer is one has sufficient elasticity.
  • a working width of the card of 2500 mm and a laying width of 2500 mm just six individual layers are possible without wrinkles being caused by the angular error on the take-off belt.
  • the invention has for its object to provide a method for the production of non-woven fabrics, as well as a stacker with which the angular error can be compensated and with which it is possible to produce non-woven fabrics from only two deposited fiber pile layers without wrinkles.
  • claims 1 and 5 serve to achieve this object.
  • the invention makes it possible to feed the fibrous web at a right angle to the take-off belt without causing a warp in the deposited fibrous web, which leads to the formation of folds or weight differences in the nonwoven fabric on the take-off belt.
  • the invention uses a compensation device, the deflection of the fibrous web takes place at an angle which corresponds to the angular error which results from the ratio of the working width of the card to the laying width and the number of layers.
  • the axis of the deflection runs at an angle to the orthogonal to the web edge of the fibrous web and thus places every position of the fibrous web to be deposited on the take-off belt at an angle with respect to the take-off belt, in such a way that the inclined position corresponds to the speed component of the take-off belt that due to the movement of the take-off belt, there can be no distortion in the deposited fibrous web.
  • the compensation device can carry out the deflection in a horizontal, in a vertical or in any intervening plane, several deflection devices possibly being required. It is essential that the axes of the deflection devices run at an angle to the orthogonal to the web edge of the fibrous web, whereby in the case of several deflection devices the sum of the deflection angles should correspond to the compensation angle.
  • the fibrous web is deflected and placed in a guided manner on the take-off belt.
  • a vertical pile section is formed by correspondingly deflecting the fibrous web, which is triangular or trapezoidal.
  • the axes of the delivery device and of the deflection run relative to one another at a compensation angle lying in a vertical plane and parallel to the nonwoven withdrawal direction.
  • the compensation device deflects the fibrous web into a triangular or trapezoidal section, the upper and lower edges of this section running at a compensation angle 1 to one another which corresponds to the angular error which arises when laying down.
  • the angular error is the angle going beyond 90 °, which the fibrous web takes up without external influence, if a zigzag-shaped web is to be generated in a stacker and the direction of withdrawal and feeding are at right angles to one another.
  • the invention can completely correct the angle error, i.e. that inelastic material webs, such as paper, can also be laid wrinkle-free.
  • the device can be designed such that at least one deflection device for adjusting the compensation angle can be adjusted.
  • the compensation device with a third deflection, by means of which the compensation angle can be changed and adapted.
  • the conveying device prefferably coupled to the drives of the stacker, e.g. the delivery rollers.
  • a separate drive for the conveyor device is then not required.
  • an additional one below the laying tapes of the laying carriage Masking tape is attached to the lower end of the compensation device and is moved with the compensation device transversely to the trigger tape.
  • the additional masking tape is useful in nonwoven production in connection with fine fibers and light pile weights in order to shield the nonwoven fabric lying on the draw-off tape against air movements which occur at higher speeds due to the back and forth movement of the laying carriage.
  • the additional cover band is deflected again on both sides of the compensation device, such that the cover band located above the deposited pile layer does not move relative to the uppermost pile layer. In this way it is ensured that the compensation device cannot carry up any upstanding fleece edges, as a result of which the fleece would be destroyed.
  • FIG. 1 is a schematic representation of a cross-stacker according to the prior art
  • FIG. 3 shows a schematic illustration of the deflection of the fibrous web according to the invention
  • FIG. 5 is a schematic representation of the storage of the fibrous web with compensation device
  • Fig. 6 is a schematic representation of a first embodiment of a masking tape
  • FIG. 7 shows a schematic illustration of the preferred exemplary embodiment of a masking tape.
  • a known stacker The principle of a known stacker is shown in Fig. 1, one e.g. in a laying carriage 8 of the crosslaid fiber web 2 is fed orthogonally to a take-off belt 4 and is deposited vertically onto the pull-off belt 4 by the laying carriage with a movement of the laying carriage which moves back and forth according to the laying width via delivery rollers 7.
  • the fibrous web 2 is laid down at a predetermined laying speed, while the take-off belt 4 is moved transversely to the fed fibrous web at a predetermined pulling speed. Due to the speed ratio, the fibrous web 2 is placed in a zigzag shape on the take-off web 4.
  • the web edges of each pile layer take on a laying angle which is dependent on the speed ratio and which can lead to wrinkling in inelastic fibrous web webs. As can be seen from FIG. 2, the laying angle leads to a warping of the fibrous web 2.
  • FIG. 3 explains the principle of compensation for the angular error that arises when the fibrous web 2 is deposited.
  • a compensation device 10 with a vertical Conveyed section 20 which has a deflection device 14, the deflection of which takes place at a compensation angle ⁇ to the horizontal.
  • the compensation angle corresponds exactly to the angular error which results from the ratio of the working width a of the fibrous web 2 to the laying width b of the fibrous web 1 and the number of layers z according to the following relationship:
  • the deflection device 14 of the compensation device 10 in connection with the deflection device 12 formed by the delivery rollers 7, brings a triangular or trapezoidal pile section 6 of the fiber card web 2 into a vertical plane, the compensation angle ⁇ of the vertical pile section 6 corresponding to the described angle error .
  • the compensation device 10 can be designed such that the compensation angle e.g. can be changed and adapted with the aid of a third deflection or the like between the deflection devices 12, 14.
  • the compensation device 10 with the deflection devices 12, 14 can be driven by coupling with the laying car 8.
  • the delivery rollers 7 can also serve as the upper deflection device 12 of the compensation device 10.
  • FIG 5 shows a first exemplary embodiment of a cross-lay with a compensation device 10 which is coupled to the lay-up carriage 8 of the cross-lay and which uses the delivery rollers 7 of the lay-up carriage 8 as the first deflection device 12.
  • the lower deflection device 14 is suitably
  • a cover tape 22 is fastened over the width of the fibrous web, which is guided over deflection rollers 28, 30, 32, 34 around the take-off belt 4 at least in the area of the deposition of the fibrous web 2 and the nonwoven fabric 1 in front protects against rapid air currents.
  • the ends of the cover strip 22 are fixed in place on the machine frame 40 in such a way that the cover strip extends parallel to the fibrous web 2 to be deposited and close above the last laid fibrous layer.
  • lower deflection rollers 14 are arranged, which deflect the cover tape 22 again, with the result that the part of the cover tape 22 running parallel to the fiber card web 2 and opposite the card web 2 is stationary relative to the last pile position. In this way, undesired air movements are avoided, as a result of which the production output of tantle ⁇ ers with compensation device 10 can be increased considerably.
  • the masking tape 22 also has the advantage that the fibrous web 2 running through the compensation device 10 when the laying carriage 8 e.g. runs to the left, rests on the deflection roller 14 on the right and is thus transported and deposited by the cover tape 22 in the correct direction and speed around the deflection roller 14. Even when the direction of movement of the laying carriage 8 is reversed, the fibrous web 2 is transported and deposited with the correct direction and speed.
  • the air moving back and forth through the laying carriage 8 can also escape laterally to the laying direction.
  • the cover band 22 can be shielded laterally with air baffles 42.
  • the side air baffles 42 can at the same time be used to prevent the cover band 22 from sagging or swinging.
  • the axes of the deflecting rollers 12 run horizontally, while the axes 18 of the rollers 14 are inclined at the compensation angle to the axes 12 and parallel to the inclination of the take-off belt 4 in the area of the fiber pile deposit.
  • the compensation angle ⁇ , the parallel guidance of the deflection rollers 14 and the inclination of the take-off belt 4 can best be seen from FIG. 4.
  • the compensation device 10 between the two deflection devices 12, 14 consists of a shaft-shaped conveying section 20 formed from sheet metal, which, viewed across the width of the fibrous web 2, is triangular or trapezoidal in order to feed the vertical pile section 6 in accordance with the predetermined compensation angle ⁇ .
  • the deflection device 14 which runs at an angle to the horizontal, is preferably designed to be adjustable with respect to the compensation angle ⁇ , the shaft walls of the conveying section 20 being able to be pushed into and out of one another accordingly.
  • the cover band 22 can be returned below the draw-off band 4 or between the upper run 36 and the lower run 38 of the draw-off band 4.
  • the masking tape 22 is always guided parallel to the trigger tape 4.

Abstract

Procédé de fabrication de non-tissés, selon lequel une bande de voile de carde est déposée pliée en zig-zag sur une bande de décharge se déplaçant transversalement au sens de réception du voile, tandis que la bande de voile de carde sort verticalement d'un dispositif de sortie animé d'un mouvement alternatif dans un plan horizontal sur la largeur de la bande de décharge. Plusieurs nappes de voile de carde sont déposées sur la bande de décharge à un certain angle de pliage, conformément au rapport existant entre la vitesse d'extraction de la bande de décharge et la vitesse de pliage de la bande de voile de carde. Il est prévu selon l'invention de retourner au moins une fois la bande de voile de carde avant de la déposer pliée sur la bande de décharge, l'axe d'au moins un retournement formant un angle avec l'orthogonale par rapport à l'arête de la bande de voile de carde et formant un angle de compensation pour le déport se produisant sur la bande de décharge.
PCT/EP1993/001296 1992-05-25 1993-05-24 Procede de fabrication de non-tisses, ainsi que plisseur transversal WO1993024692A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4217285A DE4217285C1 (de) 1990-11-28 1992-05-25 Einrichtung zum Abdecken eines gelegten Vlieses gegen Windeinflüsse bei schnellaufenden Kreuzlegern, bei Verwendung einer Kompensationseinrichtung für Winkelfehler
DEP4217285.3 1992-05-25

Publications (1)

Publication Number Publication Date
WO1993024692A1 true WO1993024692A1 (fr) 1993-12-09

Family

ID=6459693

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1993/001296 WO1993024692A1 (fr) 1992-05-25 1993-05-24 Procede de fabrication de non-tisses, ainsi que plisseur transversal

Country Status (1)

Country Link
WO (1) WO1993024692A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2739873A1 (fr) * 1995-10-13 1997-04-18 Autefa Holding Gmbh Plieuse de voile et dispositif de fabrication d'un non-tisse
US7226518B2 (en) * 2001-03-01 2007-06-05 Saint-Gobain Vetrotex France S.A. Method and device for making a composite sheet with multiaxial fibrous reinforcement
EP1927639A1 (fr) * 2006-12-01 2008-06-04 Coroplast Fritz Müller GmbH & Co. KG Bande de collage technique de voile de carde

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2387150A (en) * 1940-09-26 1945-10-16 Rudolf F Hlavaty Material handling apparatus
US4308640A (en) * 1979-03-08 1982-01-05 Celanese Corporation Cross lapping apparatus
US4357739A (en) * 1977-03-07 1982-11-09 Hergeth Kg Maschinenfabrik Und Apparatebau Apparatus for laying fiber fleeces or the like on a moving withdrawal belt
WO1991015618A1 (fr) * 1990-03-30 1991-10-17 Hergeth Hollingsworth Gmbh Procede et dispositif de pose de bandes de non-tisses ou similaires

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2387150A (en) * 1940-09-26 1945-10-16 Rudolf F Hlavaty Material handling apparatus
US4357739A (en) * 1977-03-07 1982-11-09 Hergeth Kg Maschinenfabrik Und Apparatebau Apparatus for laying fiber fleeces or the like on a moving withdrawal belt
US4308640A (en) * 1979-03-08 1982-01-05 Celanese Corporation Cross lapping apparatus
WO1991015618A1 (fr) * 1990-03-30 1991-10-17 Hergeth Hollingsworth Gmbh Procede et dispositif de pose de bandes de non-tisses ou similaires

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2739873A1 (fr) * 1995-10-13 1997-04-18 Autefa Holding Gmbh Plieuse de voile et dispositif de fabrication d'un non-tisse
US7226518B2 (en) * 2001-03-01 2007-06-05 Saint-Gobain Vetrotex France S.A. Method and device for making a composite sheet with multiaxial fibrous reinforcement
EP1927639A1 (fr) * 2006-12-01 2008-06-04 Coroplast Fritz Müller GmbH & Co. KG Bande de collage technique de voile de carde

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