EP3450606A1 - Verfahren zur bildung eines ringförmigen textilen vorformlings durch vernadelung aus einer spiralförmigen faserbahn, und maschine für die umsetzung dieses verfahrens - Google Patents

Verfahren zur bildung eines ringförmigen textilen vorformlings durch vernadelung aus einer spiralförmigen faserbahn, und maschine für die umsetzung dieses verfahrens Download PDF

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Publication number
EP3450606A1
EP3450606A1 EP18185322.7A EP18185322A EP3450606A1 EP 3450606 A1 EP3450606 A1 EP 3450606A1 EP 18185322 A EP18185322 A EP 18185322A EP 3450606 A1 EP3450606 A1 EP 3450606A1
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EP
European Patent Office
Prior art keywords
unwinder
fibrous web
forming
horizontal
needling
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
EP18185322.7A
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English (en)
French (fr)
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EP3450606B1 (de
Inventor
Hugues Leroy
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.)
Safran Landing Systems SAS
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Safran Landing Systems SAS
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Publication date
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Publication of EP3450606A1 publication Critical patent/EP3450606A1/de
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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
    • D04H18/00—Needling machines
    • D04H18/02—Needling machines with needles
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2505/00—Industrial
    • D10B2505/02—Reinforcing materials; Prepregs

Definitions

  • the present invention relates to the general field of needling a helical fibrous web for producing an annular textile preform.
  • a circular needling machine generally comprises a horizontal annular plate on which is laid a helical fibrous sheet, means (most often friction) for rotating the fibrous sheet around the vertical axis of the plate, and a needling device having a needling head extending over an angular sector of the plate and driven in relative vertical movement with respect to the plate.
  • a needling device having a needling head extending over an angular sector of the plate and driven in relative vertical movement with respect to the plate.
  • the web forming table is positioned above the needling table and feeds it continuously into a helical fibrous web.
  • the needling table discontinuously calls the helical fibrous web.
  • the needling table stops feeding the web after cutting the web, during finishing needling, during control operations of the preform, and during the evacuation of the completed preform before taking over complete cycle.
  • the continuous operation of the web-forming machine is thus antagonistic with the discontinuous operation of the needling table.
  • the present invention therefore has the main object of providing a process for the needling formation of an annular textile preform from a helical fibrous web which does not have the aforementioned drawbacks and makes it possible to accommodate operations different from the web formation and the needling table.
  • the invention is remarkable in that it proposes to receive and store the helical fibrous web produced continuously by the web forming table on an intermediate unwinder.
  • the invention allows temporary storage of the web between the web forming table and the needling table to overcome the different operating speeds between these two tables.
  • the needling table is to be stopped (for example to evacuate a preform made)
  • the helical fibrous sheet which is continuously produced by the tablecloth forming table accumulates in coils superimposed on the intermediate unwinder pending starting a new cycle of the needling table. It is thus not necessary to stop the tablecloth during the stopping of the preform forming tray.
  • the intermediate plate will perform a complete revolution both. web turns unrolled from the web forming plateau to store a web turn on the intermediate unwinder and another web turn wound in the same direction on the final unwinder.
  • the web forming plate and the preform forming plate advantageously have respective average speeds which are equal.
  • N DF k ⁇ N FP
  • k is a predetermined constant or variable factor corresponding to servo control of the amount of helical fibrous web in a control chute positioned between the final unwinder and the preform forming tray.
  • the method further comprises counting the number of turns of helical fibrous web unwound on the intermediate unwinder. This count makes it possible to manage the stopping of the web-forming machine if the maximum (predetermined) quantity of web turns stored on the intermediate unwinder is reached or, conversely, a stopping of the needling machine if the number of revolutions of tablecloth stored on the intermediate unwinder reaches zero.
  • the needling of the helical fibrous web is interrupted at the end of each annular textile preform forming cycle to allow said preform to be evacuated.
  • the invention also relates to a circular needling machine for implementing the method of forming an annular textile preform from a helical fibrous web as defined above, comprising a horizontal sheet-forming plateau intended to to form a helical fibrous web and animated with a constant and predefined rotary speed N FS , a horizontal intermediate plate positioned under the web forming plate and driven by a rotating speed N FI , a horizontal intermediate unwinder positioned on the intermediate plate and driven by a rotating speed N DI , a final horizontal unwinder positioned under the intermediate unwinder and animated with a rotational speed N DF , and a horizontal plateau forming preform positioned under the final unwinder and animated with a rotating speed N FP variable and predefined.
  • the machine further comprises a flow control chute of the helical fibrous web positioned between the final unwinder and the preform forming plate.
  • the intermediate and final unwinders may each comprise two curved circular conveyor portions disposed opposite one another.
  • the preform forming plate may comprise a needling head with a vertical movement back and forth relative to the plate.
  • the figure 1 illustrates very schematically a circular needling machine 2 according to the invention which is intended for the formation of an annular preform from a fibrous web (or band) helical.
  • such a circular needling machine 2 comprises a web forming table 4 intended to form a helical fibrous web (for example by weaving).
  • This tablecloth forming table comprises in particular a horizontal sheet forming plateau 6 on which is positioned the fibrous web 8 being formed.
  • the sheet forming tray 6 is driven in a rotational movement around a vertical axis 10.
  • the formation of the sheet being an operation can be carried out continuously at the same speed, the sheet forming plateau 6 is more precisely driven by a rotational movement at a rotating speed N FS which is constant and predefined.
  • the circular needling table 2 also comprises a final unwinder 12 located below the tablecloth forming table 4, this final unwinder being typically intended to unroll the fibrous web 8 wound on the tablecloth forming tray 6 for the bring to needling.
  • the final unwinder 12 comprises a circular conveyor 14 for rotating the fibrous web 8 around the vertical axis 10.
  • This circular conveyor 14 may advantageously be formed of two curved conveyor portions 14a, 14b which are each half-shaped. -disque and which are arranged opposite one another (the straight edges of these conveyor portions are parallel and face to face). The direction of rotation of these curved conveyor portions is directed so as to cause a complete turn of 360 ° to the fibrous web 8 about the vertical axis 10.
  • the circular conveyor 14 of the final unwinder 12 is controlled to turn the fibrous web 8 around the vertical axis at a rotating speed N DF .
  • a needling table 16 which is intended to ensure a circular needling of the fibrous web 8 unwound from the final unwinder.
  • the needling table 16 is known, for example from the publication EP 2,339,055 , and will not be described in detail. Briefly, it comprises a horizontal preform forming plate 18 which receives the fibrous web to drive it in rotation about the vertical axis 10 at a rotational speed N FP , this speed being adjustable.
  • the fibrous web undergoes a needling by a needling head (not shown in FIG. figure 1 ) extending over an angular sector of the web-forming platen and moved vertically back and forth relative thereto.
  • the fibrous web 8 which is unwound from the circular conveyor 14 of the The final unwinder is conveyed to the preform forming tray 18 through a web flow control chute 20 extending vertically between the final unwinder and the preform tray.
  • a web flow control chute 20 extending vertically between the final unwinder and the preform tray.
  • the rotary speed N FP of the preform forming plate 18 is by nature non-constant since it is necessary in particular at the end of each preform formation cycle by needling (after the needling of a predefined number of layers of fibrous web) to stop the rotation of the plate to evacuate the preform before starting a new cycle.
  • this rotary speed N FP is a predefined datum which is different from the rotary speed N FS of the web forming plate 6.
  • a horizontal intermediate unwinder 24 is positioned on the intermediate plate 22 and driven by a rotating speed N DI .
  • this intermediate unwinder includes a circular conveyor 26 that can be composed of two curved conveyor portions 26a, 26b which are each in the form of a half-disk and which are arranged facing each other , the direction of rotation of these curved portions being directed so as to cause a complete turn of 360 ° to the fibrous web 8 about the vertical axis 10.
  • control of the circular needling machine according to the invention and in particular the rotational speeds of the various elements that constitute it, is as follows.
  • the speeds N FS (of the web formation plateau 6) and N FP (of the preform formation plateau 18) are input variables that are known. Moreover, these plates 4, 18 have respective average speeds which are equal.
  • control equation (a) is a consequence of the presence of the regulation channel of the unwinding of the web 20 between the final unwinder and the preform forming plate. More precisely, this equation is equivalent to: ## EQU1 ## in which k is a predetermined constant or variable factor corresponding to a control regulation of the quantity of helical fibrous sheet in the regulation chute.
  • control equations (b) and (c) are in particular intended to ensure storage of several turns of fibrous web on the intermediate unwinder without constraining the fibrous web between the intermediate unwinder and the final unwinder and without constraining the fibrous web at the exit of the tablecloth forming tray.
  • the figure 2 shows an example of a speed control of the various elements of the circular needling machine according to the invention.
  • this figure shows an example of cyclic chronograms of the speeds N FP , N FS , N F1 , and N DI satisfying the control equations (a) to (c) according to the invention.
  • the speed N FS of the tablecloth is programmed to be constant and equal to 6 rpm.
  • the speed N FP of the preform forming plate is programmed to vary cyclically between 0 and 10 rpm.
  • a zero N FP speed corresponds to the stop time of the preform forming plate necessary to evacuate the preform once it has been completed and to reset the machine before restarting for a new training cycle.
  • This downtime is typically of the order of 50s or so.
  • N TS represents the number of turns of fibrous web that accumulates on the intermediate unwinder.
  • the control of the speeds N DF , N FI and N DI makes it possible to continuously accumulate between 2 and 10 turns of fibrous web on the intermediate unwinder.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)
EP18185322.7A 2017-09-01 2018-07-24 Verfahren zur bildung eines ringförmigen textilen vorformlings durch vernadelung aus einer spiralförmigen faserbahn, und maschine für die umsetzung dieses verfahrens Active EP3450606B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1758088A FR3070696B1 (fr) 2017-09-01 2017-09-01 Procede de formation par aiguilletage d'une preforme textile annulaire a partir d'une nappe fibreuse helicoidale et machine pour la mise en oeuvre d'un tel procede

Publications (2)

Publication Number Publication Date
EP3450606A1 true EP3450606A1 (de) 2019-03-06
EP3450606B1 EP3450606B1 (de) 2019-10-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP18185322.7A Active EP3450606B1 (de) 2017-09-01 2018-07-24 Verfahren zur bildung eines ringförmigen textilen vorformlings durch vernadelung aus einer spiralförmigen faserbahn, und maschine für die umsetzung dieses verfahrens

Country Status (3)

Country Link
US (2) US11193223B2 (de)
EP (1) EP3450606B1 (de)
FR (1) FR3070696B1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002068747A1 (fr) * 2001-02-26 2002-09-06 Messier-Bugatti Procede et dispositif de commande d'avance de plaque fibreuse aiguilletee.
EP1397544A1 (de) * 2001-04-30 2004-03-17 Messier-Bugatti Endlose spiralförmige zuführbahn für vernadelungsmaschine
EP2339055A1 (de) * 2009-12-22 2011-06-29 Messier Bugatti Kreisförmige Nadelmaschine wobei einer Faserstoffbahn durch ein Förderband und eine vertikale Rutsche zugeführt wird

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5546880A (en) * 1994-12-29 1996-08-20 The Bf Goodrich Company Annular filamentary structures and methods of making
FR2741634B1 (fr) * 1995-11-27 1998-04-17 Europ Propulsion Procede pour la realisation de preformes fibreuses destinees a la fabrication de pieces annulaires en materiau composite
FR2757153B1 (fr) * 1996-12-17 1999-03-05 Carbone Ind Procede de fabrication de pieces, notamment de disques de freins, en materiau composite carbone-carbone
US8377249B2 (en) * 2009-04-03 2013-02-19 The Procter & Gamble Company Appraratus and method for providing a localized speed variance of an advancing substrate
US10406798B2 (en) * 2014-03-31 2019-09-10 Goodrich Corporation Method to transport and lay down dry fiber bundles

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002068747A1 (fr) * 2001-02-26 2002-09-06 Messier-Bugatti Procede et dispositif de commande d'avance de plaque fibreuse aiguilletee.
EP1397544A1 (de) * 2001-04-30 2004-03-17 Messier-Bugatti Endlose spiralförmige zuführbahn für vernadelungsmaschine
EP2339055A1 (de) * 2009-12-22 2011-06-29 Messier Bugatti Kreisförmige Nadelmaschine wobei einer Faserstoffbahn durch ein Förderband und eine vertikale Rutsche zugeführt wird

Also Published As

Publication number Publication date
US11193223B2 (en) 2021-12-07
FR3070696B1 (fr) 2019-09-13
US11725318B2 (en) 2023-08-15
FR3070696A1 (fr) 2019-03-08
EP3450606B1 (de) 2019-10-16
US20220074095A1 (en) 2022-03-10
US20190071804A1 (en) 2019-03-07

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