EP2764150B1 - Dispositif a structure en nappe apte au drapage - Google Patents

Dispositif a structure en nappe apte au drapage Download PDF

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Publication number
EP2764150B1
EP2764150B1 EP11815751.0A EP11815751A EP2764150B1 EP 2764150 B1 EP2764150 B1 EP 2764150B1 EP 11815751 A EP11815751 A EP 11815751A EP 2764150 B1 EP2764150 B1 EP 2764150B1
Authority
EP
European Patent Office
Prior art keywords
reinforcing
yarns
reinforcing yarns
angle
threads
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
EP11815751.0A
Other languages
German (de)
English (en)
Other versions
EP2764150A1 (fr
Inventor
Martin Gerster
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.)
Gustav Gerster & Co KG GmbH
Original Assignee
Gustav Gerster & Co KG GmbH
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Application filed by Gustav Gerster & Co KG GmbH filed Critical Gustav Gerster & Co KG GmbH
Publication of EP2764150A1 publication Critical patent/EP2764150A1/fr
Application granted granted Critical
Publication of EP2764150B1 publication Critical patent/EP2764150B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B21/14—Fabrics characterised by the incorporation by knitting, in one or more thread, fleece, or fabric layers, of reinforcing, binding, or decorative threads; Fabrics incorporating small auxiliary elements, e.g. for decorative purposes
    • D04B21/16—Fabrics characterised by the incorporation by knitting, in one or more thread, fleece, or fabric layers, of reinforcing, binding, or decorative threads; Fabrics incorporating small auxiliary elements, e.g. for decorative purposes incorporating synthetic threads
    • D04B21/165—Fabrics characterised by the incorporation by knitting, in one or more thread, fleece, or fabric layers, of reinforcing, binding, or decorative threads; Fabrics incorporating small auxiliary elements, e.g. for decorative purposes incorporating synthetic threads with yarns stitched through one or more layers or tows, e.g. stitch-bonded fabrics
    • 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
    • D10B2403/00—Details of fabric structure established in the fabric forming process
    • D10B2403/02—Cross-sectional features
    • D10B2403/024—Fabric incorporating additional compounds
    • D10B2403/0241—Fabric incorporating additional compounds enhancing mechanical properties
    • D10B2403/02412—Fabric incorporating additional compounds enhancing mechanical properties including several arrays of unbent yarn, e.g. multiaxial fabrics
    • 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 invention relates to a scrim device with a plurality of reinforcing yarns, which are divided into at least two groups, of which a first, referred to as 0 ° reinforcing yarns group is oriented in a longitudinal direction and a second, referred to as 90 ° amplifier yarns group perpendicular to the Longitudinal direction of the first group is oriented.
  • the reinforcing yarns are designed for reinforcement of a composite structure to be formed in a separate process.
  • Scrim devices of the type mentioned above are used in the prior art to produce flat textiles with a substantially planar and possibly slightly concave or convex curved surface.
  • the known scrim devices however, have the disadvantage that a local drapability for forming highly curved surfaces is not given.
  • a clutch device of the type mentioned is from the document EP 0 268 838 known.
  • This document further discloses a sheet of fibers, in particular as a reinforcing insert for plastic parts, with warp and weft lying in the plastic filaments, the threads are made of a material that shrinks when exposed to a temperature below the melting point of the material temperature, and wherein the material after heat exposure with the result of shrinking substantially resumes its original strength to be well deformed at low weight and relatively low production costs and thus versatile to use as a reinforcing insert.
  • DE 27 07 001 discloses knitted or stitched textiles which on the one hand comprises a warp either of warp threads, ie longitudinally arranged thread formations, or a base layer consisting of a fabric and weft yarns lying thereon, ie transverse thread formations, on the other hand a knitted fabric joining the base layer and the weft threads, characterized in that the weft threads consist of two systems of transversely arranged thread structures, between which the base layer lies, so that the textiles have on both sides an articulated surface with transverse channels.
  • the object of the invention is to provide a scrim device whose local drapability for the formation of strongly curved concave / convex surfaces over the known scrim devices is substantially improved.
  • the scrim device according to the invention is intended intended to form together with an applied matrix of resin or thermoplastic a solid fiber composite, for example, for use in aircraft or for the production of rotors for wind turbines.
  • this object is achieved in that both groups of amplifier yarns of the amplifier yarns at least partially enveloping wrapping threads are held together so loosely that a displacement of any of the amplifier yarns is ensured in relation to an adjacent amplifier yarn, said draping the fabric to form concave / convex structures by pulling the reinforcing yarns of all groups from the edge region of the fabric, giving local drapability without elongation or wrinkling of adjacent reinforcement yarns when forming concave / convex structures.
  • both groups of reinforcing yarns of the reinforcing yarns at least partially enveloping Umhüllungsfäden are loosely held together that a displacement of any of the reinforcing yarns in relation to an adjacent reinforcing yarn is ensured, wherein a drape of the fabric to concave to form / Convex structures by pulling the reinforcing yarns of all Groups from the edge region of the Geleges takes place, wherein a local drapability is given without an expansion or wrinkling of adjacent reinforcing yarns occurs in a formation of concave / convex structures, achieved that necessary for the formation of concave / convex structures extension of a reinforcing yarn not by stretching the same is achieved, but in that a respective reinforcing yarn is drawn from the edge region ago.
  • the novel and advantageous properties of the scrim device according to the invention are achieved by a mesh-compatible incorporation of the reinforcing yarns, which furthermore has the advantage that damage to reinforcing yarns is ruled out.
  • This is in contrast to prior art scrim devices in which needles for introducing fixation threads from one side pierce the scrim, damaging individual scrim yarns.
  • the fixing threads conventionally introduced in this manner for connecting the individual reinforcing yarns to one another prevent a mutually displacing the reinforcing yarns against each other and thus prevent the possibility of forming locally strongly curved concave / convex structures.
  • sheath threads contain stitch-forming crochet threads which are arranged parallel to and between the 0 ° reinforcing yarns and envelop each of the 90 ° reinforcing yarns with one stitch each.
  • wrapping threads are formed by traversing threads running between in each case two adjoining crochet threads and linked to the crochet threads at respective connecting points. As a result, falling out of the 0 ° amplifier yarns is reliably prevented.
  • a traversing thread is preferably at an angle of 90 ° to 20 °, in the narrower sense at an angle of 70 ° to 30 ° and in particular at an angle of 50 ° to 40 ° or 45 ° to the longitudinal axis of 0 ° amplifier yarns arranged.
  • the traversing yarns are preferably arranged alternately in the direction of the longitudinal axis of a 0 ° amplifier yarn in a positively dimensioned angle (80 ° to 20 °) and a negative-sized angle (80 ° to -20 °).
  • a third group of amplifier yarns which are arranged at an oblique angle to the longitudinal axis of the 0 ° amplifier yarns and are held by meshes, each enveloping different of the 90 ° amplifier yarns.
  • a reinforcing yarn is typically not necessarily formed from a bundle of parallel filaments, however, wherein a filament may be formed of a natural fiber or a synthetic fiber and made of glass fiber, carbon fiber or aramid fiber.
  • the inventive scrim device 100 comprises a plurality of reinforcing yarns 110, 120 which are divided into two main groups, of which a first group designated as 0 ° reinforcing yarns 110 is oriented in a longitudinal direction and a second group designated as 90 ° reinforcing yarns 120 perpendicular to the longitudinal direction of the first group 110 is oriented.
  • Both groups of reinforcing yarns 110, 120 are held together by the reinforcing yarns 110, 120 at least partially enveloping sheath threads 130, which contact the reinforcing yarns 110, 120 of both groups only in the region of the periphery and thus a displaceability of any reinforcing yarn 110, 120 in relation to ensure an adjacent amplifier yarn 110, 120.
  • the wrapping threads 130 include stitch-forming crochet threads 140 that are parallel to and between the 0 ° Amplifier yarns 110 are arranged and wrap each with a mesh of each of the 90 ° amplifier yarns 120.
  • the wrapping threads 130 are furthermore formed by traversing threads 150 running between in each case two adjacent crochet threads 140 and linked to the crochet threads 140 at respective connecting points 141, which reliably prevent the 0 ° reinforcing threads 110 from falling out.
  • a traversing yarn 150 is arranged at an angle of approximately 45 ° to the longitudinal axis of a 0 ° amplifier yarn 110, wherein the traversing yarns 150 in the direction of the longitudinal axis of a 0 ° amplifier arm 110 alternately in a positive-sized angle (+ 45 °) and a negative-sized angle (-45 °) are arranged.
  • a third group of amplifier yarns 125 is arranged at an oblique angle to the longitudinal axis of the 0 ° amplifier yarns 110.
  • the respective amplifier yarns 125 are held by meshes 126 which respectively envelop different ones of the 90 ° reinforcing yarns 120.
  • An amplifier yarn 110, 120, 125 is formed from a bundle of parallel filaments.
  • a filament is formed by an aramid fiber.
  • Draping the fabric 100 to form concave / convex structures is accomplished by drawing the reinforcement yarns 110, 120, 125 of all groups from the edge region of the fabric.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Woven Fabrics (AREA)

Claims (11)

  1. Dispositif en nappe (100) comportant une pluralité de fils de renforcement (110, 120) qui sont répartis en au moins deux groupes dont un premier groupe désigné fils de renforcement à 0° (110) est orienté dans un sens longitudinal, et un deuxième groupe désigné fils de renforcement à 90° (120) est orienté à angle droit transversalement au sens longitudinal du premier groupe (110), les deux groupes de fils de renforcement (110, 120) étant maintenus de telle manière de façon lâche par des fils de gainage gainant au moins partiellement les fils de renforcement (110, 120) qu'une mobilité d'un quelconque des fils de renforcement (110, 120) par rapport à un fil de renforcement voisin (110, 120) est assurée, un drapage de la nappe (100) pour la formation de structures concaves/convexes ayant lieu par rétraction des fils de renforcement (110, 120, 125) de tous les groupes à partir de la zone de bordure de la nappe (110), caractérisé en ce qu'une drapabilité locale est donnée sans que, lors d'une formation de structures concaves/convexes, des fils de renforcement voisins se dilatent ou forment des plis.
  2. Dispositif selon la revendication 1, caractérisé en ce que des fils de gainage sont constitués par des fils de crochet (140) qui constituent des mailles (126) et sont agencés parallèlement aux fils de renforcement à 0° (110) et entre ces derniers et gainent avec respectivement une maille chacun des fils de renforcement à 90° (120).
  3. Dispositif selon une des revendications 1 ou 2, caractérisé en ce que des fils de gainage sont constitués par des fils de va-et-vient (150) passant entre respectivement deux fils de crochet (140) voisins et attachés aux fils de crochet (140) à des points respectifs d'attache (141) respectifs.
  4. Dispositif selon la revendication 3, caractérisé en ce qu'un fil de va-et-vient (150) est, en fonction de l'éloignement des points d'attache (141), agencé à un angle d'environ 80° à environ 20° par rapport à l'axe longitudinal d'un fil de renforcement à 0° (110).
  5. Dispositif selon la revendication 3, caractérisé en ce qu'un fil de va-et-vient (150) est agencé à un angle de 70° à 30° par rapport à l'axe longitudinal d'un fil de renforcement à 0 ° (110).
  6. Dispositif selon la revendication 3, caractérisé en ce qu'un fil de va-et-vient (150) est agencé à un angle de 50° à 40° par rapport à l'axe longitudinal d'un fil de renforcement à 0° (110).
  7. Dispositif selon la revendication 3, caractérisé en ce qu'un fil de va-et-vient (150) est agencé à un angle d'environ 45° par rapport à l'axe longitudinal d'un fil de renforcement à 0° (110).
  8. Dispositif selon une des revendications de 4 à 7, caractérisé en ce que les fils de va-et-vient (150) sont agencés dans le sens de l'axe longitudinal d'un fil de renforcement à 0° (110) en alternance à un angle mesuré positivement de 80° à 20° et à un angle mesuré négativement de 80° à -20°.
  9. Dispositif selon une des revendications précédentes, caractérisé en ce qu'un troisième groupe de fils de renforcement (125) est prévu, lesquels sont agencés à un angle oblique par rapport à l'axe longitudinal des fils de renforcement à 0° (110) et sont en l'occurrence maintenus par des mailles (126) qui gainent respectivement différents des fils de renforcement à 90° (120).
  10. Dispositif selon une des revendications précédentes, caractérisé en ce qu'un fil de renforcement (110, 120, 125) est constitué d'un faisceau de filaments parallèles. (130).
  11. Dispositif selon la revendication 10, caractérisé en ce qu'un filament est fait d'une fibre synthétique, d'une fibre naturelle ou d'une fibre de verre, fibre de carbone ou fibre aramide.
EP11815751.0A 2011-10-07 2011-10-07 Dispositif a structure en nappe apte au drapage Active EP2764150B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/DE2011/001819 WO2013050009A1 (fr) 2011-10-07 2011-10-07 Dispositif à structure en nappe apte au drapage

Publications (2)

Publication Number Publication Date
EP2764150A1 EP2764150A1 (fr) 2014-08-13
EP2764150B1 true EP2764150B1 (fr) 2015-07-15

Family

ID=45562651

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11815751.0A Active EP2764150B1 (fr) 2011-10-07 2011-10-07 Dispositif a structure en nappe apte au drapage

Country Status (2)

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EP (1) EP2764150B1 (fr)
WO (1) WO2013050009A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CS184152B1 (en) * 1976-03-16 1978-08-31 Ervin Faulhaber Knitted or knit-bonded fabric and apparatus for manufacturing the same
US4857379A (en) * 1986-10-24 1989-08-15 Verseidag Industrietextilien Gmbh Sheetlike structure of fibers, especially as a reinforcement for plastics components
FR2680803B1 (fr) * 1991-08-27 1993-12-17 Crst Armature textile tubulaire pour le renforcement de materiaux et dispositif pour sa fabrication.
US6841492B2 (en) * 2002-06-07 2005-01-11 Honeywell International Inc. Bi-directional and multi-axial fabrics and fabric composites

Also Published As

Publication number Publication date
EP2764150A1 (fr) 2014-08-13
WO2013050009A1 (fr) 2013-04-11

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