EP2764150A1 - Dispositif à structure en nappe apte au drapage - Google Patents

Dispositif à structure en nappe apte au drapage

Info

Publication number
EP2764150A1
EP2764150A1 EP11815751.0A EP11815751A EP2764150A1 EP 2764150 A1 EP2764150 A1 EP 2764150A1 EP 11815751 A EP11815751 A EP 11815751A EP 2764150 A1 EP2764150 A1 EP 2764150A1
Authority
EP
European Patent Office
Prior art keywords
yarns
amplifier
reinforcing
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.)
Granted
Application number
EP11815751.0A
Other languages
German (de)
English (en)
Other versions
EP2764150B1 (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
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 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

Links

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 reinforcing 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.
  • the object of the invention is therefore to provide a jelly 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 VerMarchrgamen of the VerMarchrgame 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.
  • the merlanal combination ensures that both groups of reinforcing yarns are held together loosely by covering yarns at least partially enveloping the reinforcing yarns so as to ensure displaceability of any one of the reinforcing yarns in relation to an adjacent reinforcing yarn so as to provide local drapability without being at one
  • Formation of concave / convex structures takes place an expansion or wrinkling of adjacent reinforcing yarns.
  • An extension of a reinforcing yarn which is necessary for the formation of concave / convex structures is not achieved by stretching the same, but by drawing in a respective reinforcing yarn from the edge region.
  • 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 the prior art scrim devices wherein needles for introducing fixation threads from one side pierce the scrim, thereby damaging individual scrim yarns.
  • the fixation threads conventionally introduced in this manner for connecting the individual reinforcing yarns to one another prevent mutually displacing the reinforcing yarns against one another and thus prevent the possibility of forming locally strongly curved concave / convex structures.
  • the Omhüllungsfäden contain stitch-forming crochet threads, which are arranged parallel to and between the 0 ° Verorgorgrgamen and envelop each with a mesh of each of the 80 ° amplifier yarns.
  • the Wrapping threads are formed by traversing threads running between in each case two adjacent crochet threads and linked to the hook 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 a 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 Haschen, 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.
  • a draping of the fabric to form concave / convex structures is generally accomplished by pulling the reinforcement yarns of all groups from the edge region of the fabric.
  • FIG. 1 shows a preferred embodiment of the device according to the invention in a view from above;
  • Fig. 2 in Fig. 1 illustrated preferred embodiment of the device according to the invention in a view from below;
  • Fig. 3 shows a further preferred embodiment of the device according to the invention in a view from above.
  • the inventive scrim device 100 illustrated in FIGS. 1 and 3 includes a plurality of reinforcing yarns 110, 120 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, is defined as 90 ° amplifier yarns 120 group 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 at the periphery, and thus relocate any reinforcing yarn 110, 120 to ensure an adjacent amplifier yarn 110, 120.
  • the wrapping threads 130 include hook forming thread 140 which are arranged parallel to and between the 0 ° reinforcing threads 110 and each wrap one loop at each of the 90 ° reinforcing threads 120.
  • the wrapping threads 130 are furthermore formed by traversing threads 150 that run between two mutually adjacent crochet threads 140 and are 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 arms 125 are held by Haschen 126, each enveloping different of the 90 ° amplifier arms 120.
  • An amplifier yarn 110, 120, 125 is formed from a bundle of parallel filaments.
  • a filament is formed by an aramid fiber.
  • Draping of the fabric 100 to form concave / convex structures is done by drawing in the Reinforcing 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)

Abstract

L'invention concerne un dispositif à structure en nappe (100) présentant une pluralité de fils de renforcement (110, 120) qui sont répartis en au moins deux groupes, dont un premier groupe désigné comme groupe de fils de renforcement à 0° (110) est orienté dans une direction longitudinale et un deuxième groupe désigné comme groupe de fils de renforcement à 90° (120) est orienté à angle droit transversalement à la direction longitudinale du premier groupe (110). Une drapabilité locale pour former des surfaces à courbure concave/convexe marquée est obtenue du fait que les deux groupes de fils de renforcement (110, 120) sont réunis de manière lâche par des fils de gainage (130) entourant au moins en partie les fils de renforcement (110, 120), de manière qu'un quelconque fil de renforcement (110, 120) puisse rester mobile par rapport à un fil de renforcement (110, 120) voisin.
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 true EP2764150A1 (fr) 2014-08-13
EP2764150B1 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)

Country Link
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2013050009A1 *

Also Published As

Publication number Publication date
EP2764150B1 (fr) 2015-07-15
WO2013050009A1 (fr) 2013-04-11

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