EP2327822B1 - Verfahren und Vorrichtung zum Erzeugen einer UD-Lage - Google Patents

Verfahren und Vorrichtung zum Erzeugen einer UD-Lage Download PDF

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Publication number
EP2327822B1
EP2327822B1 EP10008360.9A EP10008360A EP2327822B1 EP 2327822 B1 EP2327822 B1 EP 2327822B1 EP 10008360 A EP10008360 A EP 10008360A EP 2327822 B1 EP2327822 B1 EP 2327822B1
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EP
European Patent Office
Prior art keywords
width
bands
layer
filament
filament strands
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
EP10008360.9A
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German (de)
English (en)
French (fr)
Other versions
EP2327822A1 (de
Inventor
Hans-Jürgen Heinrich
Frank Vettermann
Astrid Kirchberg
Alexander Wegner
Dietmar Reuschel
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.)
Karl Mayer Textilmaschinenfabrik GmbH
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Karl Mayer Textilmaschinenfabrik GmbH
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Publication of EP2327822A1 publication Critical patent/EP2327822A1/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
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
    • D04H3/04—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments in rectilinear paths, e.g. crossing at right angles
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/18—Separating or spreading
    • 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

Definitions

  • the invention relates to a method for producing a UD layer with a predetermined layer width from a predetermined number of filament strands, wherein the filament strands transverse to the longitudinal direction of the UD layer spreads to ribbon and juxtaposed.
  • the invention relates to a device for producing a UD layer having a predetermined layer width with a filament strand dispenser assembly from which a predetermined number of filament strands is simultaneously removable, a spreading device for each filament strand for spreading the filament strand transversely to its longitudinal direction into a ribbon and a winding device for the common winding of the spread and juxtaposed ribbon.
  • the invention is described below using the example of filament strands with carbon filaments. However, it is not limited to carbon filaments.
  • Carbon filaments are sold in filament strands containing 12,000, 24,000, 48,000 or more carbon filaments. The larger the number of carbon filaments, the cheaper the filament strands are usually.
  • the filament strands have in cross section approximately the shape of an ellipse or a circle.
  • UD layers also referred to as unidirectional layers.
  • the fibers or filaments are all in the same main direction. They do not have to be exactly parallel to each other. However, they all go in the same direction. A fiber reinforced plastic will then have an increased tensile strength in that direction.
  • the filament strands In order to be able to produce such a UD layer from the filament strands, the filament strands must be arranged side by side and spread out to form ribbons. The then present in a plane next to each other tapes are then co-wound or otherwise processed together. Under certain circumstances, a cross-cohesion between adjacent ribbons is produced.
  • a method and a device of the type mentioned is, for example EP 0 972 102 B1 known.
  • DE 10 2005 008 705 B3 shows an apparatus for feeding slivers to a knitting machine in which slivers are withdrawn from bobbins at a uniform speed but further processed with predetermined down times. During downtime, the slivers are cached in a controlled memory.
  • EP 2 151 517 A1 shows a method and apparatus for making UD layer in which the filaments are spread into ribbons, the ribbons then be grouped into segments. The segments are then deposited in succession on conveyors, so that there is a UD layer whose fiber direction is oblique to the longitudinal direction of the UD layer.
  • the spreading of the filament strands to the tapes is carried out simply by pulling the filament strands with a certain tension over a deflection device, for example a round bar. Due to the tensile stress, all filaments or fibers tend to approach the rod. In this case, filaments or fibers, which are arranged closer to the rod, through the farther away filaments or Fiber displaced laterally outwards. This automatically creates a broadening of the filament strand to the ribbon.
  • a UD ply made with such ribbons has some waviness or unevenness across its length, in other words a non-uniform thickness.
  • the invention has for its object to produce a UD layer with a uniform thickness as possible.
  • This object is achieved in a method of the type mentioned in that one spreads the ribbon to a ribbon width which is greater than a pitch width, resulting from the layer width divided by the number of filament strands results.
  • fibers For the following explanation, the term “filaments” is used. However, the invention is equally applicable to fibers.
  • a UD layer having a predetermined layer width is produced by spreading all filament strands to the pitch width and then arranging them next to one another.
  • the pitch width is the ply width divided by the number of filament strands used.
  • a first possibility is that the strips are pushed together after spreading transversely to the longitudinal direction.
  • the pushing together for example, by passing the ribbon through a guide that is narrower than the original ribbon width.
  • This guide acts primarily on the outer fibers of the ribbon and shifts them inwards.
  • the ribbon center (seen in the transverse direction) is virtually unaffected by the pushing together. Accordingly, there is an increase in thickness at the longitudinal edges of the ribbon, without a corresponding increase in thickness in the middle of the ribbon. It is preferred that one pushes the ribbon to a ribbon width corresponding to the pitch width. In this case, it is possible to arrange the juxtaposed strips transversely side by side, so to speak, in order to produce a UD layer with a closed surface.
  • the distances can be chosen to be relatively small, for example 0.1 to 1 mm.
  • the ribbons are arranged overlapping transversely to the longitudinal direction.
  • the overlapping placement may occur after the ribbons have been pushed together transversely.
  • the overlapping arrangement can also take place without the strips being pushed together in the transverse direction.
  • each edge areas are deposited on each other, which have a, compared to the center of the ribbon, smaller thickness. In sum, then results in an approximately uniform thickness across the width of the ribbon. By pushing together the ribbon before overlapping you can adjust the thickness more precisely.
  • the bands are spread to a ribbon width greater than the pitch width is. This results in overlapping areas, which in sum have the desired thickness.
  • ribbons of varying width are produced.
  • the width change can be done periodically, for example.
  • Adjacent tapes can then be arranged next to one another in such a way that they hit one another with their larger widths, so that a gap remains in the flat material in the areas of smaller width.
  • the filament strands are prepared in at least two different planes. This then leads to the fact that the filament strands do not interfere with each other during spreading. So you can easily spread the filament strands to a width that is greater than the pitch width. Even if the filament strands are spread out to a smaller width or pushed laterally together after spreading to a larger width, it is advantageous if you have enough handling space available for each filament strand or the resulting ribbon.
  • the object is achieved in a device of the type mentioned above in that the spreading devices are divided into at least two groups, wherein in which the groups are arranged at different positions and adjacent filament strands are guided by different groups and the strips each extend to a width which is greater than a pitch width, which results from the layer width divided by the number of filament strands.
  • At least some spreading devices are each followed by a calibration device which pushes the ribbon transversely to its longitudinal direction to a predetermined width.
  • a calibration device which pushes the ribbon transversely to its longitudinal direction to a predetermined width.
  • the predetermined width is equal to a pitch width corresponding to the ply width divided by the number of filament strands. In this case results in a UD layer in which the fibers are arranged side by side without gaps.
  • the predetermined width is greater than the pitch width.
  • the adjacently arranged bands overlap, so that the sum of their border areas is added together. Even with thinner edge areas then results in total thickness, which corresponds much better to the thickness in the middle of the ribbon.
  • the predetermined width is smaller than the pitch width. In this case, resulting in the later UD position in the transverse direction gaps between the individual bands that allow a passage of plastic.
  • the calibration device preferably has a bandwidth variation device.
  • a bandwidth variation device When pushing the ribbon transverse to its direction of rotation, one can thereby produce portions of the bands which have a greater width and portions which have a smaller width. If the individual ribbons are then arranged next to one another, gaps are created in the sheet formed thereby, through which plastic can later pass. This makes it easier to realize a penetration of the gel with plastic.
  • the bandwidth variation device may be formed in different ways. If the calibration device has a rotating shaft with grooves that ultimately define the width of the ribbons, then one can easily change the width of the ribbons by using grooves having a varying width in the circumferential direction. In this case, the width of the ribbons thus produced varies periodically.
  • Another possibility is to form the calibration device by flanges located on a shaft, between which the tapes are passed. By changing the axial position of the flanged wheels can cause a change in the width of the ribbon.
  • Fig. 1 shows a device 1 for producing a UD layer 2, which is wound on a winding 3.
  • adjacent turns can be separated by a release paper or other release agent on the winding 3 from each other.
  • the device 1 has a filament strand dispenser assembly 4.
  • the filament strand dispenser assembly 4 may be formed, for example, as a gate in which a plurality of coils is arranged, wherein a filament strand is wound on each spool.
  • the filament strand dispenser assembly may also include a plurality of drums or cartons, with a filament tow arranged in each bin or carton.
  • Filament strands 5 are withdrawn from the filament strand dispenser assembly and passed through a first delivery mechanism 6. Conveniently, the filament strands 5 are arranged parallel to each other here.
  • a first group 7 of spreading devices is arranged and a second group 8 of spreading devices.
  • the spreading device 7 has three rods 9-11, over which the filament strands 5 are drawn with a predetermined tension.
  • the tensile stress is generated by a second delivery mechanism 12, which is arranged shortly before the winding 3.
  • the second group 8 of spreaders has three rods 13-15 over which other filament strands 5 are pulled with the same tension.
  • the same voltage results from the fact that all filament strands 5 are exposed to the voltage which results in dependence on the tensile stress of the second delivery mechanism 12.
  • the filament strands 5 are now guided so that adjacent filament strands 5 are alternately fed to the first group 7 and the second group 8 of the spreading devices.
  • the spreading or spreading of adjacent filament strands 5 thus takes place in different planes. This makes it possible to spread the individual filament strands 5 quasi independent of each other.
  • the filament strands 5 can be spread to ribbons whose width is greater than a pitch width.
  • the pitch width corresponds to the ply width of the finished UD ply 2 divided by the number of filament strands 5.
  • the filament strands 5 are in the form of bands 16, 17.
  • These tapes 16, 17 are now performed together by a nip 18, which is formed between two rollers 19, 20 and can also be referred to as a "nip".
  • the UD layer 2 is then formed, which can be deflected by a further deflection roller 22 and then passed through the second delivery mechanism 12. Other tours are possible.
  • the ribbons 16, 17 have a greater width than the division width, the ribbons 16 overlap, 17.
  • the overlapping areas are pressed together in the nip 18 with a high voltage. You can also omit the nip 18, if you can achieve a tension in the ribbon 16, 17 in other ways on the roller 19, which causes the edge regions of the ribbon 16, 17 are pressed into each other.
  • the bands 16, 17 can still be passed through calibration devices 22, 23 after passing through their respective spreading devices.
  • the calibration devices 22, 23 are in Fig. 2 shown schematically. In the simplest case, these are rods 24, 25 which have alternating circumferential grooves 26, 27 and projections 28, 29.
  • the ribbon 16 When the ribbon 16 is passed through the calibration device 22, then, after exiting the calibration device 22, it has a width corresponding to the distance between two protrusions 28a, 28b. Similarly, a ribbon 17 passing through the calibration device 23 has a width corresponding to a distance between two protrusions 29a, 29b.
  • the two calibration devices 22, 23 are each offset by a ribbon width transversely to the running direction or longitudinal direction of the UD layer 2, so that a projection 28a, 28b is arranged approximately in a gap to a groove 27a, 27b.
  • a situation is illustrated in which the groove 27c has a width that is less than the opposite projection 28c. Accordingly, a distance 30 transversely to the longitudinal direction results between adjacent bands 16, 17 after passing through the calibration devices 22, 23. This distance can For example, adjust to a size in the range of 0.2 to 1 mm. In the UD layer 2, it is then possible for the plastic to pass through the UD layer.
  • a situation is illustrated in which the width of the groove 27a of one calibration device 23 corresponds exactly to the width of the projection 28a in the other calibration device 22. Accordingly, one can produce here a UD layer in which the individual bands 16, 17 lie side by side without gaps and without overlap.
  • the thickness of the UD layer is nevertheless kept uniform in these two cases. Namely, it can be observed that the calibration means 22, 23 mainly act on the filaments disposed at the edge portions of the ribbons 16, 17, and push these filaments toward the center of the ribbons 16, 17. This results in a thickening of the ribbons 16, 17 in the edge regions. However, the center of the ribbons 16, 17 remains virtually uninfluenced by this displacement of the filaments in the edge regions.
  • Fig. 2c a situation is shown in which the groove 26 has a greater width than the opposite projection 29c. Accordingly, there is an overlap 31 between adjacent bands 16, 17. Since the slightly wider bands 16, 17 have also been pushed together transversely to the longitudinal direction, the thickness of the edge regions can be adjusted relatively well so that the sum of the thicknesses of the edge regions can be adjusted later of the Thickness of the ribbon 16, 17 corresponds to its center. A slightly larger thickness is harmless.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Moulding By Coating Moulds (AREA)
  • Nonwoven Fabrics (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
EP10008360.9A 2009-11-27 2010-08-11 Verfahren und Vorrichtung zum Erzeugen einer UD-Lage Active EP2327822B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009056197A DE102009056197A1 (de) 2009-11-27 2009-11-27 Verfahren und Vorrichtung zum Erzeugen einer UD-Lage

Publications (2)

Publication Number Publication Date
EP2327822A1 EP2327822A1 (de) 2011-06-01
EP2327822B1 true EP2327822B1 (de) 2013-05-15

Family

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Family Applications (1)

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EP10008360.9A Active EP2327822B1 (de) 2009-11-27 2010-08-11 Verfahren und Vorrichtung zum Erzeugen einer UD-Lage

Country Status (6)

Country Link
US (1) US8567024B2 (zh)
EP (1) EP2327822B1 (zh)
JP (1) JP5498352B2 (zh)
CN (1) CN102080304B (zh)
DE (1) DE102009056197A1 (zh)
ES (1) ES2410580T3 (zh)

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US9751278B2 (en) 2012-11-26 2017-09-05 Ocv Intellectual Capital, Llc Multi-axial fabrics, polymer-fiber laminates, and bodies incorporating same for connecting applications
DE102013218102A1 (de) 2013-09-10 2015-03-12 Thermoplast Composite Gmbh Vorrichtung zur verdrillfreien Breitenänderung eines die Vorrichtung durchlaufenden Faserbandes sowie System mit mehreren derartigen Vorrichtungen
DE102014211016B3 (de) * 2014-06-10 2015-11-26 Bayerische Motoren Werke Aktiengesellschaft Verfahren zur Herstellung eines Faser-Halbzeugs, Faser-Halbzeug zur Herstellung eines Faserverbundwerkstoffs sowie Bauteil aus einem Faserverbundwerkstoff und lokal definierter Permeabilität
DE102014219035A1 (de) * 2014-09-22 2016-03-24 Bayerische Motoren Werke Aktiengesellschaft Verfahren zur Herstellung von textilen Halbzeugen mittels Faserdirektablage
JP6807854B2 (ja) 2015-03-10 2021-01-06 ファイバ リーインフォースト サーモプラスティックス ベー．フェー． 繊維強化複合材
DE102015206389A1 (de) 2015-04-10 2016-10-13 Bayerische Motoren Werke Aktiengesellschaft Vorrichtung zur Reduzierung der Filamentzahl eines Faserrovings
EP3251827B1 (en) 2016-05-30 2021-07-28 Covestro Deutschland AG Combined carbon- and glass-fiber reinforced thermoplastic polyurethane and polyamide composites and its manufacturing
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Also Published As

Publication number Publication date
EP2327822A1 (de) 2011-06-01
CN102080304A (zh) 2011-06-01
CN102080304B (zh) 2013-02-06
US20110146040A1 (en) 2011-06-23
JP2011111709A (ja) 2011-06-09
JP5498352B2 (ja) 2014-05-21
ES2410580T3 (es) 2013-07-02
US8567024B2 (en) 2013-10-29
DE102009056197A1 (de) 2011-06-01

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