EP3280664A1 - Vorrichtung zur reduzierung der filamentzahl eines faserrovings - Google Patents
Vorrichtung zur reduzierung der filamentzahl eines faserrovingsInfo
- Publication number
- EP3280664A1 EP3280664A1 EP16706152.2A EP16706152A EP3280664A1 EP 3280664 A1 EP3280664 A1 EP 3280664A1 EP 16706152 A EP16706152 A EP 16706152A EP 3280664 A1 EP3280664 A1 EP 3280664A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cutting
- faserrovings
- fiber
- faserroving
- dividing
- 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
Links
- 239000000835 fiber Substances 0.000 title claims abstract description 85
- 238000005520 cutting process Methods 0.000 claims abstract description 44
- 238000003892 spreading Methods 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims description 5
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 15
- 239000004917 carbon fiber Substances 0.000 description 15
- 239000011265 semifinished product Substances 0.000 description 15
- 239000011159 matrix material Substances 0.000 description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 7
- 125000006850 spacer group Chemical group 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000003677 Sheet moulding compound Substances 0.000 description 4
- 239000000969 carrier Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010073 coating (rubber) Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000012783 reinforcing fiber Substances 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 210000001170 unmyelinated nerve fiber Anatomy 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H51/00—Forwarding filamentary material
- B65H51/005—Separating a bundle of forwarding filamentary materials into a plurality of groups
-
- 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
- D04H3/02—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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/31—Textiles threads or artificial strands of filaments
- B65H2701/314—Carbon fibres
Definitions
- the present invention relates to a device for reducing the
- Filament number of a first fiber roving with a device for conveying the fiber roving along its longitudinal direction according to the preamble of claim 1.
- Fiber-reinforced plastics are increasingly used due to their high recoverable strength at the same low weight in the mass production of vehicles, this often fiber matrix semi-finished products are used in the form of, for example, pre-impregnated semi-finished products, so-called prepregs.
- prepreg is a semi-finished product of continuous fibers which may be impregnated by a thermosetting matrix.
- fiber-matrix semi-finished products with fiber reinforcements so-called SMC (Sheet Molding Compounds), which may also be prefabricated as semifinished products. It can be used as reinforcing fibers
- Carbon fibers are used, which are present as a roving, which have a plurality of individual fibers or filaments.
- the rovings are thereby cut to produce semifinished products largely transversely to their longitudinal direction to form fiber sections and fed to a substrate material provided with resin material and then wound in the form of a tape on a roll.
- Carbon fibers with the matrix material decreases with increasing filament number, while the mechanical strength values of the individual fibers at roving with lower filament count and higher filament count are hardly different.
- so-called heavy tows - these are rovings with a very high filament count - often used because of their cost advantage and then, for example, to form unidirectional layers - so-called UD scrim - spreads by means of a spreader to wide tapes (tapes) or spread.
- the object of the present invention is to provide a device for reducing the filament number of a fiber roving, so that the cost-effective use of heavy tows for the formation of easily impregnated semi-finished products is possible and not as previously for the formation of corresponding semi-finished products on several rovings with lower Filamentiere must be used, whereby the cost of the semifinished product increase considerably.
- the invention provides a device for reducing the filament count of a first fiber roving, comprising means for conveying the fiber roving along its longitudinal direction, the apparatus comprising a first fiber roving expanding spreader and a device for dividing the spread Faserrovings in at least two second Faserrovings with reduced
- a high-filament fiber roving into lower-filament fiber rovings.
- a low cost 50K carbon fiber roving can be used to form lower filament strand fiber strands which can then be used to provide a SMC semi-finished product
- the lower filament strand fiber strands have the advantage that they can be better impregnated with matrix material due to less dense individual fibers per unit volume than, for example, the 50K Roving used as the starting material.
- Filament bands in at least two individual filament tapes, each with a lower filament number performed.
- the filament number of the first becomes
- the first fiber roving is singulated with the device according to the invention and indeed to second fiber rovings with a lower number of respective individual fibers.
- the spreader is a cylindrical body with a plurality of circumferentially of the body fan-shaped dividing circumferential grooves.
- the circumferential grooves may extend along a part of the body in the circumferential direction.
- the first Faserroving can be widened into a band by being pulled under tension in the circumferential direction of the cylindrical body over the cylindrical body, so that the fibers of the roving run into the fan-shaped dividing circumferential grooves of the cylindrical body and follow the circumferential grooves and are spread in this way, so the roving passes from an elongated approximately circular contour in a band-shaped contour.
- the spreader is arranged stationary relative to the moving first Faserroving, the fiber roving is thus pulled under tension over the cylindrical body and the control of the tensile force on Faserroving and the control of the wrap angle of the fiber roving on the cylindrical body, the degree of broadening or spreading of the fiber roving can be adjusted.
- the device has a drive roller which is rotationally acted upon during operation of the device, and applied to the first Faserroving and / or the second Faserrovings with a tensile force.
- a drive roller which is rotationally acted upon during operation of the device, and applied to the first Faserroving and / or the second Faserrovings with a tensile force.
- Faserroving acting tensile stress can be adjusted.
- the device thus acts simultaneously as a roving brake.
- the device for dividing the fiber roving to comprise at least one cutting means that subdivides the first fiber roving into at least two second fiber rovings with a reduced number of filaments. This allows the spread band to be subdivided into at least two sub-strands and to capture and sever fibers cut across or at an angle to the longitudinal direction of the band, for example carbon fibers.
- the means for dividing the first fiber roving comprises at least one rotating cutting blade which performs the first fiber roving in at least divided least two second Faserrovings with reduced Filamentzahi while cutting at an angle to the cutting blade extending fibers.
- the cutting blades can be formed on the outer contour V-shaped and divide the incoming into the detection range of the cutting blade sliver and thereby cut at an angle obliquely to the longitudinal direction of the belt extending carbon fibers.
- the device has two at least substantially parallel to each other arranged carrier, which are designed to receive the spreader and the device for splitting.
- a plurality of first fiber rovings can be pulled by means of the drive roller over a plurality of spreaders and so spread and each widened into a band and fed to a plurality of cutting devices or cutting blades, so that from the plurality of individual fiber rovings with high Filamentzahi a plurality of second Faserrovings with lower Filamentzahi can be formed.
- the device is designed to change the wrapping angle formed between the first fiber roving and the spreading device, whereby, as already explained above, the degree of broadening of the first fiber roving are influenced to a sliver can.
- the means for dividing the first Faserrovings has at least two cutting blades whose distance from one another to change the width of the second
- Faserrovings is changeable. In this way, over the change in the distance of the first Faserroving associated cutting blade
- Filamentzahi K of the second fiber rovings are changed. It is also possible to have a plurality of cutting blades associated with a first fiber roving different distance of the cutting blade to each other to arrange, so that even second fiber rovings can be formed with different filament number.
- the carriers are designed to change the angle, so that the angle of the directions of the first Faserrovings upstream and downstream of the spreader can be changed.
- the carriers can be pivoted relative to the running direction of the first fiber roving running, for example, from a creel, whereby the wrap angle of the first fiber rovings on the spreading device and / or the wrap angle of the fiber rovings on the drive roller can be changed.
- the device may have at least one rotating cutting blade for dividing the first fiber roving, this cutting knife passing through the first fiber roving between the first fiber roving
- Cutting knife and the drive roller comes into contact with the outer circumference of the drive roller, which advantageously for this purpose has an outer circumference, which is formed elastically at least in the contact region with the fiber rovings.
- the cutting blades thus divide the fiber sliver formed from the first fiber roving into partial strands and thereby cut individual fibers arranged at an angle to the longitudinal direction of the sliver and are supported in this cutting process against the elastic surface on the outer circumference of the drive roller. It is provided that the cutting blade and the drive roller have opposite directions of rotation, so that there is a certain Switzerlandbeetzstoffung the slivers on any driven cutting blade.
- the device has a cutting device for cutting the second Faserrovings largely transverse to its longitudinal direction and the cutting device is a component of an automated device for producing a portion of second Faserrovings and resin material having semifinished tape is.
- the cutting device can thus be part of an automated production line for producing a semifinished product roll, which has a carrier film with portions of the second fiber rovings taken up in resin material in roll form.
- Fig. 1 is a plan view of a schematically illustrated embodiment of a device according to the present invention.
- Fig. 2 is a side view of the device of Fig.
- FIG. 3 is a detail view "A" of Fig. 1;
- Fig. 5 is a schematic representation of an automated production line for semi-finished fiber products with sections of the second fiber rovings.
- Fig. 1 of the drawing shows a plan view of a schematically illustrated embodiment of a device 1 according to the present invention and Fig. 2 of the drawing shows the device 1 in a side view.
- the device 1 comprises two elongated supports 2, between which a spreader 3 is arranged at the top end in the drawing plane, which has an elongated cylindrical body 4, which is shown in more detail with reference to FIG. 4 of the drawing.
- the two carriers 2 are, as shown with reference to the arrow 5, rotatably mounted on two receptacles 6, so that the angle ⁇ shown in Fig. 2 of the drawing can be changed.
- the wrap angle ⁇ which can also be seen in FIG. 2 of the drawing, can be changed become.
- the wrap angle ⁇ is the angle measured between the first fiber roving 7 in the running direction or conveying direction of the arrow 8 upstream of the spreading device 3 and downstream of the spreading device 3, along which the first fiber roving 7 has contact with the cylindrical body 4.
- the cylindrical body 4 has a plurality of circumferentially of the body 4 fan-shaped dividing circumferential grooves 9, which cause the first Faserroving 7, which is a 50K C fiber roving can act, so around a carbon fibers or carbon fibers having roving with about 50,000 individual fibers during its contact in the circumferential direction of the cylindrical body 4 undergoes a contour change.
- Faserroving 7 before contact with the cylindrical body 7 has a configuration with a first width B1 and after contact with the cylindrical body 4, a second width B2, which has largely tripled.
- the approximately circular formed first Faserroving 7 has undergone a change in shape by spreading on the cylindrical body 4 and that to a belt body 10, but still has a filament number of about 50,000.
- the belt body 10 comes into contact with a drive roller 11 shown in more detail with reference to FIG. 3 whose outer circumference is provided with an elastic coating in the form of, for example, a rubber coating 12.
- the drive roller 11 is driven by means of a drive device, not shown, in the direction of the arrow 13 and, due to this rotational actuation, ensures that the first fiber roving 7 moves in the direction of the arrow 4 2 acting tensile force is acted upon, so that the originating from a creel not shown fiber roving 4 during its entire movement through the device 1 is under tension.
- the drive roller 11 opposite are arranged in the direction of arrow 16 rotating cutting blade 15 on an axis 17, through which the band body 10 and first Faserroving 7 is divided into four second Faserrovings 18 with a filament count of about 12,500 individual fibers.
- Spacers 19 are arranged between the cutting blades 15 so that the distance between the individual cutting blades 5 can be adjusted by spacers 19 of different widths, or even spacers 19 can be exchanged for further cutting blades 15.
- the width of the second fiber rovings 18 can be adjusted and thus also the filament number of the second fiber rovings. It is also possible, by replacing the spacers 18 against further cutting blades 15, to change the number of second fiber rovings 18 that can be obtained from a first fiber roving 7.
- the second Faserrovings 18 have after the division of the first fiber roving 7 by the cutting blade 15 at a distance from each other and can be wound on a drum, not shown. This drum with second fiber rovings 18 can then be used on the automated production line for semifinished fiber products shown schematically in FIG.
- the second fiber rovings are withdrawn as a belt 20 and fed to a cutting device 21, the sliver sections 22 of predetermined length from the belt 20 cuts off, which then fall onto a carrier film 23.
- a resin-hardener mixture is applied to the carrier film 23 by a feed device 24, onto which the fiber strip sections then fall and are then incorporated into the matrix material by means of a Waikumble 25 with a plurality of rollers or rollers and onto them Be impregnated with matrix material.
- the semifinished product strip 26 produced in this way can then be wound up on a roll or drum 27, from which prepreg sections can then be cut off, which serve, for example, for the production of body structures of a motor vehicle.
- the device according to the invention it is possible to process a carbon fiber roving with a high number of filaments by spreading and singulation so that it can be formed of several partial strands of fiber rovings with lower filament number, which are much better for impregnation with matrix material formed as the original carbon fiber roving with higher
- the carbon fibers roving in the carbon fiber roving with a high filament number at an angle to the longitudinal direction of the roving are cut through by the device according to the invention during singling and therefore do not disturb the singling process. This way can be a cost effective
- Carbon fiber roving with high filament number are processed so that it can form semi-finished products and thus ultimately components with high strength and good mechanical properties.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Preliminary Treatment Of Fibers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015206389.5A DE102015206389A1 (de) | 2015-04-10 | 2015-04-10 | Vorrichtung zur Reduzierung der Filamentzahl eines Faserrovings |
PCT/EP2016/053099 WO2016162136A1 (de) | 2015-04-10 | 2016-02-15 | Vorrichtung zur reduzierung der filamentzahl eines faserrovings |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3280664A1 true EP3280664A1 (de) | 2018-02-14 |
EP3280664B1 EP3280664B1 (de) | 2020-05-13 |
Family
ID=55411361
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16706152.2A Active EP3280664B1 (de) | 2015-04-10 | 2016-02-15 | Vorrichtung zur reduzierung der filamentzahl eines faserrovings |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3280664B1 (de) |
DE (1) | DE102015206389A1 (de) |
WO (1) | WO2016162136A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6860580B2 (ja) | 2016-01-26 | 2021-04-14 | コンチネンタル ストラクチュラル プラスティックス, インコーポレイテッド | 解束した繊維トウを含有するプリフォームマットおよび成形組成物において使用する、繊維トウを解束する方法およびシステム |
US10570536B1 (en) * | 2016-11-14 | 2020-02-25 | CFA Mills, Inc. | Filament count reduction for carbon fiber tow |
DE102019125531A1 (de) * | 2019-09-23 | 2021-03-25 | Newcycle Kunststofftechnik Gmbh | Verfahren zur Herstellung von Carbonfaserstrangabschnitten, Verfahren zum Verstärken von Bauteilen, Carbonfaserstrangabschnittherstellungsvorrichtung und Bauteilherstellungsvorrichtung |
CN111776850A (zh) * | 2020-08-26 | 2020-10-16 | 中冶重工(唐山)有限公司 | 并列式预应力钢丝缠绕工艺 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3417560A (en) * | 1963-11-21 | 1968-12-24 | Celanese Corp | Method and apparatus for producing a semi-continuous filament yarn |
US3439385A (en) * | 1966-07-05 | 1969-04-22 | Celanese Corp | Tow spreading and width control device |
DE2252946A1 (de) * | 1972-10-28 | 1974-05-02 | Bayer Ag | Auftrennverfahren vielfach-gewickelter monofiler und multifiler faeden |
US4301579A (en) * | 1979-05-14 | 1981-11-24 | E. I. Du Pont De Nemours And Company | Widening-narrowing guide for textile filament bundle |
DE3163062D1 (en) * | 1980-07-29 | 1984-05-17 | Rieter Ag Maschf | Traversing device for a cutter for a synthetic-filament cable |
DE29904191U1 (de) * | 1999-03-09 | 1999-05-27 | Pott, Richard, 32791 Lage | Kettfaden-Faserschicht |
JP4617912B2 (ja) * | 2005-02-10 | 2011-01-26 | 東レ株式会社 | 炭素繊維の分割方法、およびシートモールディングコンパウンドの製造方法 |
DE102009056197A1 (de) | 2009-11-27 | 2011-06-01 | Karl Mayer Malimo Textilmaschinenfabrik Gmbh | Verfahren und Vorrichtung zum Erzeugen einer UD-Lage |
US8616110B2 (en) * | 2010-09-01 | 2013-12-31 | Ford Global Technologies, Llc | Method and apparatus for making a fiber reinforced article |
DE102011005678B4 (de) * | 2011-03-17 | 2018-06-07 | Bayerische Motoren Werke Aktiengesellschaft | Vorrichtung und Verfahren zum Aufspalten eines Endlos-Faserrovings |
-
2015
- 2015-04-10 DE DE102015206389.5A patent/DE102015206389A1/de active Pending
-
2016
- 2016-02-15 EP EP16706152.2A patent/EP3280664B1/de active Active
- 2016-02-15 WO PCT/EP2016/053099 patent/WO2016162136A1/de active Application Filing
Also Published As
Publication number | Publication date |
---|---|
WO2016162136A1 (de) | 2016-10-13 |
EP3280664B1 (de) | 2020-05-13 |
DE102015206389A1 (de) | 2016-10-13 |
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