EP0553000B1 - Nähverfahren für ein Faserteil - Google Patents

Nähverfahren für ein Faserteil Download PDF

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Publication number
EP0553000B1
EP0553000B1 EP93400059A EP93400059A EP0553000B1 EP 0553000 B1 EP0553000 B1 EP 0553000B1 EP 93400059 A EP93400059 A EP 93400059A EP 93400059 A EP93400059 A EP 93400059A EP 0553000 B1 EP0553000 B1 EP 0553000B1
Authority
EP
European Patent Office
Prior art keywords
thread
needle
shuttle
fibrous
stitching
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
EP93400059A
Other languages
English (en)
French (fr)
Other versions
EP0553000A1 (de
Inventor
Etienne Lemaire
Lucien Fantino
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.)
Airbus Group SAS
Original Assignee
Airbus Group SAS
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 Airbus Group SAS filed Critical Airbus Group SAS
Publication of EP0553000A1 publication Critical patent/EP0553000A1/de
Application granted granted Critical
Publication of EP0553000B1 publication Critical patent/EP0553000B1/de
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
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/10—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically
    • D04H3/115—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically by applying or inserting filamentary binding elements
    • 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
    • D04H3/002—Inorganic yarns or filaments
    • 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
    • D04H3/002—Inorganic yarns or filaments
    • D04H3/004—Glass yarns or filaments

Definitions

  • the present invention relates to the production of reinforcements for the production of fiber-matrix composite parts with high mechanical and / or thermal performance.
  • fibrous reinforcements are produced which are trapped in a hardenable matrix.
  • the fibers which can be used for the production of such fibrous reinforcements are for example made of carbon, boron, glass, aramid, etc. In the following, such fibers will be called "technical fibers”.
  • the object of the present invention is to remedy these drawbacks and to allow the stitching of parts made of technical fibers by means of threads, also of technical fiber, by using conventional sewing machines, even in the case where said parts are thick.
  • the technical fiber thread can not be broken or weakened by the stitching needle.
  • the technical fiber thread is only in contact with the auxiliary needle thread, which pulls it into the fibrous part. It will be noted that the present invention goes against the knowledge of those skilled in the art, since the latter has always used as a needle thread, the technical thread with which he wished to piguage (see DE-A-2 704 378).
  • auxiliary wire acting only as a means of pulling the wire shuttle in technical fiber, can be formed by any known wire having the tensile strength appropriate to its office. It can, for example, be constituted by a known textile yarn, made of natural or synthetic fiber.
  • the sewing machine used to implement the method according to the present invention usually comprises a presser foot for engaging and guiding said fibrous piece in a relative displacement relative to the needle, allowing the production of stitches.
  • the presser foot exerts pressure on said fibrous part and therefore a compaction thereof.
  • Such packing favors the production of the stitch according to the invention and the thickening of said fibrous part.
  • Such a fibrous piece can be intended for producing a composite fiber-matrix piece subjected to a stitching operation using a needle thread and a shuttle thread and remarkable in that it comprises technical fibers passing through it parallel to its thickness and formed by said shuttle wire.
  • a composite fiber-matrix part can be produced from such a fibrous part by forming said matrix in the latter.
  • said technical fibers are not connected to each other by portions of shuttle wire transverse to the thickness of said fibrous part.
  • FIG. 1 is a diagrammatic view, in section, of a fibrous piece, making it possible to illustrate the formation, in known manner, of stitches in said piece using a needle thread and a shuttle wire.
  • Figure 2 is a schematic sectional view, similar to Figure 1, illustrating the stitching in accordance with the present invention.
  • FIG. 3 shows, in a similar view, the fibrous part of FIG. 2, after elimination of the parts of the needle and shuttle threads external to said fibrous part.
  • the part 1, shown in FIGS. 1 to 3, is made up of technical fibers (carbon, glass, aramid, boron, etc.) and it has opposite faces 2 and 3. It can be in the form of a fabric, possibly impregnated with hardenable resin, or else in the form of a mattress in which the fibers, dry or pre-impregnated with hardenable resin, are arranged in an organized fashion, in two or more determined directions or else distributed randomly.
  • the fibrous part 1 can even be made up of several individual superposed layers.
  • FIG. 1 the process of stitching said fibrous piece 1 is illustrated schematically by means of a needle thread 4 coming from a reel, by means of tension adjustment means, and a thread shuttle 5 from a bobbin, by means of wire braking means.
  • a needle thread 4 coming from a reel
  • tension adjustment means and a thread shuttle 5 from a bobbin
  • wire braking means for clarity, the needle, the shuttle, the needle thread spool, the bobbin, said tension adjustment means and said braking means have not been shown; in addition, it was assumed that a relative movement of displacement existed between the needle and the fibrous part 1, this relative displacement being symbolized by the arrow D.
  • the needle through which the needle thread 4 enters the fibrous part 1 through the face 2 thereof crosses said fibrous part parallel to its thickness e and projects outside the face 3 by forming a loop 6 with the needle thread 4.
  • the shuttle arranged on the side of the face 3 and containing the shuttle thread bobbin 5, crosses then the loop 6.
  • the needle rises, draws with it its own needle thread 4 and tightens the loop 6 which traps the thread 5 coming from the shuttle and pulls it through the needle thread 4. This process is repeated throughout a stitch line thanks to the relative movement of movement D. A series of stitch stitches 7 is thus obtained.
  • the needle thread 4 and the shuttle thread 5 each form a loop, respectively 8 and 9, said loops 8 and 9 passing one inside the other and forming a contact point 10 between needle thread 4 and shuttle thread 5.
  • the means for adjusting the tension of the needle thread 4 and the braking means for the shuttle thread 5 are adjusted so that the contact points 10 are within the thickness of the fibrous part 1, like this is shown in figure 1.
  • the various stitching points 7 are connected to each other by bridges 11 of the needle thread and by bridges 12 of the shuttle thread, said bridges 11 resting on the face 2 of the fibrous part 1, while the bridges 12 rest on the face 3 of the latter.
  • the branches 9B of the loops 9 of the shuttle wire 5 are pressed and held in place inside the fibrous part 1 by the fibers constituting the latter.
  • FIG. 3 after stitching, it is possible to eliminate, on the side of the face 2, the textile yarn 4 and the ends 9A of the loops 9 of the shuttle yarn 5, and / or, on the side of face 3, the bridges 12 of said shuttle wire 5, without harming the quality of the connection established through the fibrous part 1 by the branches 9B, thus constituting technical fibers transverse to the fibrous part 1.
  • transverse fibers 9B can be used to join individual fibrous layers of the fibrous part 1 (to form a thick fibrous element or else to join the overlapping edges of two individual fibrous elements), or even to form technical reinforcing fibers parallel to the thickness of said fibrous part 1.
  • the sewing machine used to implement the invention comprises a presser foot intended to guide the fibrous part 1 in its movement D relative to the needle, it is understood that this foot -biche can be used for compaction, parallel to the thickness of the fibrous piece 1, of the fibers constituting the latter, so that this thickness is regulated and that the formation of the stitching point, in accordance with the invention and illustrated by the Figure 2, is facilitated.
  • the fibrous part 1 can undergo all the known operations of impregnation and hardening of the matrix. It will also be noted that the elimination of the wire 4, of the ends 9A and / or of the bridges 12 can possibly be carried out after obtaining the composite-matrix part produced from the fibrous part 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Woven Fabrics (AREA)
  • Nonwoven Fabrics (AREA)

Claims (4)

  1. Verfahren zum Nähen eines Faserteils (1) für die Herstellung eines Faser-Matrix-Verbundteils mit Hilfe eines Fadens aus einer technischen Faser (5), nach dem das Nähen durch Verschlingen eines Oberfadens (4) mit einem Unterfaden (5) in der Weise erfolgt, daß bei jedem Nähstich (7) der Oberfaden in das Faserteil durch eine Nadel eingeführt wird, die eine Hin- und Herbewegung ausführt und auf ihrem Hinweg in das Faserteil auf einer ersten Seite (2) desselben eindringt und aus diesem auf einer zweiten Seite (3), die der ersten Seite entgegengesetzt ist, wieder austritt, wobei der Unterfaden auf der zweiten Seite mit dem Oberfaden verschlungen wird, während der Unterfaden auf dem Rückweg der Nadel durch den Oberfaden in das Faserteil gezogen wird, wobei die Spannungen von Unter- und Oberfaden unterschiedlich sind,
    dadurch gekennzeichnet, daß:
    - der Oberfaden (4) aus einem zugfesten Hilfsfaden besteht;
    - der Unterfaden (5) aus der technischen Faser besteht und
    - die Spannung des Unterfadens (5) und die Spannung des Oberfadens (4) so niedrig bzw. hoch eingestellt werden, daß am Ende des Nähstichs (7) der Unterfaden (5) außen am Faserteil (1) auf der ersten Seite (2) desselben (in 9A) übersteht und der Oberfaden (4) sich ebenfalls auf der ersten Seite (2) von Faserteil (1) vollständig außerhalb desselben befindet.
  2. Verfahren nach Anspruch 1,
    dadurch gekennzeichnet, daß der Hilfsfaden, der den Oberfaden darstellt, ein textiler Faden aus einer Naturfaser oder einer synthetischen Faser ist.
  3. Verfahren nach Anspruch 2,
    dadurch gekennzeichnet, daß der Hilfsfaden, der den Oberfaden darstellt, nach dem Nähen des Faserteils entfernt wird.
  4. Verfahren nach einem der Ansprüche 1 oder 2,
    dadurch gekennzeichnet, daß die Teile (9A, 12) des Unterfadens, die auf der ersten und zweiten Seite (2, 3) des Faserteils (1) sichtbar werden, nach dem Nähen desselben entfernt werden.
EP93400059A 1992-01-24 1993-01-13 Nähverfahren für ein Faserteil Expired - Lifetime EP0553000B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9200761 1992-01-24
FR9200761A FR2686627B1 (fr) 1992-01-24 1992-01-24 Procede pour le piquage d'une piece fibreuse, piece fibreuse ainsi obtenue et piece composite fibres-matrice obtenue a partir de ladite piece fibreuse.

Publications (2)

Publication Number Publication Date
EP0553000A1 EP0553000A1 (de) 1993-07-28
EP0553000B1 true EP0553000B1 (de) 1996-11-06

Family

ID=9425940

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93400059A Expired - Lifetime EP0553000B1 (de) 1992-01-24 1993-01-13 Nähverfahren für ein Faserteil

Country Status (6)

Country Link
US (1) US5333562A (de)
EP (1) EP0553000B1 (de)
JP (1) JP3396244B2 (de)
CA (1) CA2086568C (de)
DE (1) DE69305755T2 (de)
FR (1) FR2686627B1 (de)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2718802B1 (fr) * 1994-04-18 1996-06-14 Aerospatiale Bielle en matière composite et procédé pour sa fabrication.
FR2718757B1 (fr) * 1994-04-18 1996-06-14 Aerospatiale Procédé et machine pour la réalisation d'une armature en forme de plaque pour une pièce de matière composite.
US7056576B2 (en) * 2001-04-06 2006-06-06 Ebert Composites, Inc. 3D fiber elements with high moment of inertia characteristics in composite sandwich laminates
US6676785B2 (en) 2001-04-06 2004-01-13 Ebert Composites Corporation Method of clinching the top and bottom ends of Z-axis fibers into the respective top and bottom surfaces of a composite laminate
US7105071B2 (en) * 2001-04-06 2006-09-12 Ebert Composites Corporation Method of inserting z-axis reinforcing fibers into a composite laminate
US20050025948A1 (en) * 2001-04-06 2005-02-03 Johnson David W. Composite laminate reinforced with curvilinear 3-D fiber and method of making the same
US7785693B2 (en) 2001-04-06 2010-08-31 Ebert Composites Corporation Composite laminate structure
US7731046B2 (en) * 2001-04-06 2010-06-08 Ebert Composites Corporation Composite sandwich panel and method of making same
US6645333B2 (en) 2001-04-06 2003-11-11 Ebert Composites Corporation Method of inserting z-axis reinforcing fibers into a composite laminate
US20050118448A1 (en) * 2002-12-05 2005-06-02 Olin Corporation, A Corporation Of The Commonwealth Of Virginia Laser ablation resistant copper foil
IL163135A (en) * 2004-07-21 2010-02-17 Yair Eilam Sewing machine for stitching with a composite thread
ITMI20050119A1 (it) * 2005-01-28 2006-07-29 Top Glass Spa Struttura di pannello e relativo procedimento di realizzazione
DE102013218572A1 (de) 2013-09-17 2015-03-19 Audi Ag Verfahren zum Verbinden von Preform-Strukturen
JP6187410B2 (ja) * 2014-08-04 2017-08-30 豊田合成株式会社 ステッチラインの形成方法

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US298053A (en) * 1884-05-06 Eduaed bally
US795290A (en) * 1904-02-23 1905-07-25 George A Lowry Fabric and method of making same.
US2283802A (en) * 1941-09-20 1942-05-19 Clair H Gingher Fabric making machine
US3322868A (en) * 1963-07-02 1967-05-30 Douglas Aircraft Co Inc Three dimensional reinforced structure
US3291085A (en) * 1964-08-14 1966-12-13 Levy David Method of sewing a footwear construction
US3533893A (en) * 1966-11-22 1970-10-13 Fred W Hartstein Decorative tufted fabric
US3921085A (en) * 1973-11-23 1975-11-18 William J Keane Frequency discriminator apparatus
FR2315562A1 (fr) * 1975-06-26 1977-01-21 Commissariat Energie Atomique Procede et dispositifs de fabrication de corps ou pieces en tissus tri-dimensionnels
FR2355936A1 (fr) * 1976-02-03 1978-01-20 Commissariat Energie Atomique Procede de fabrication de pieces en tissus tri-dimensionnels
FR2565262B1 (fr) * 1984-05-29 1986-09-26 Europ Propulsion Procede de fabrication d'une texture fibreuse multidirectionnelle et dispositif destine a la mise en oeuvre du procede
JPS63165562A (ja) * 1986-12-27 1988-07-08 電気化学工業株式会社 耐熱性無機繊維成形体及びその製造方法
US5038693A (en) * 1989-09-21 1991-08-13 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Composite flexible blanket insulation

Also Published As

Publication number Publication date
JP3396244B2 (ja) 2003-04-14
CA2086568A1 (fr) 1993-07-25
DE69305755D1 (de) 1996-12-12
DE69305755T2 (de) 1997-03-20
CA2086568C (fr) 2000-09-26
US5333562A (en) 1994-08-02
JPH0686877A (ja) 1994-03-29
EP0553000A1 (de) 1993-07-28
FR2686627A1 (fr) 1993-07-30
FR2686627B1 (fr) 1995-06-16

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