EP0754794A2 - Maschine zur Herstellung vorkonfektionierter Verstärkungsgelege - Google Patents

Maschine zur Herstellung vorkonfektionierter Verstärkungsgelege Download PDF

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Publication number
EP0754794A2
EP0754794A2 EP96111444A EP96111444A EP0754794A2 EP 0754794 A2 EP0754794 A2 EP 0754794A2 EP 96111444 A EP96111444 A EP 96111444A EP 96111444 A EP96111444 A EP 96111444A EP 0754794 A2 EP0754794 A2 EP 0754794A2
Authority
EP
European Patent Office
Prior art keywords
semi
needle
machine according
apron
reinforcing fibers
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.)
Withdrawn
Application number
EP96111444A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0754794A3 (enrdf_load_stackoverflow
Inventor
Karl-Heinz Hörsting
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.)
LIBA Maschinenfabrik GmbH
Original Assignee
LIBA Maschinenfabrik 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
Priority claimed from DE19624912A external-priority patent/DE19624912C2/de
Application filed by LIBA Maschinenfabrik GmbH filed Critical LIBA Maschinenfabrik GmbH
Publication of EP0754794A2 publication Critical patent/EP0754794A2/de
Publication of EP0754794A3 publication Critical patent/EP0754794A3/xx
Withdrawn legal-status Critical Current

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    • 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
    • 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
    • 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
    • D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
    • D04H5/06—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by welding-together thermoplastic fibres, filaments, or yarns

Definitions

  • the invention relates to a machine for producing prefabricated reinforcement fabrics with a thermosetting / thermoplastic matrix according to the preamble of claim 1.
  • Fiber-plastic composites are becoming increasingly important and consist of fibers, fiber layers, fabrics, scrims or the like, which can be connected to an overall composite using a matrix.
  • the fibers, threads, fabrics, fabrics or similar to be connected are referred to below as semi-finished yarns.
  • These semi-finished thread products can be pre-impregnated with a matrix, these pre-impregnated semi-finished products, for example, in the SMC (sheet molding compounds) method, in which a thermosetting matrix is used, GMT (glass mat-reinforced thermoplastics) method, in which a thermoplastic matrix is used or prepreg processes are used.
  • SMC sheet molding compounds
  • GMT glass mat-reinforced thermoplastics
  • the matrix must have good adhesion to the fiber or the threads in order to be able to optimally transmit forces between individual filaments. Correct fiber wetting is particularly important for this. For example, accumulated air bubbles lead to delamination.
  • Pre-impregnated fiber structures are referred to as SMC molding compounds, GMT semi-finished products or so-called prepregs.
  • mat systems are used to manufacture essentially flat composite products. Such a mat system is described in principle for SMC molding compositions in "Introduction to the Technology of Fiber Composites, Michaeli / Wegener, Karl-Hanser-Verlag, Kunststoff-Vienna, 1989, p. 17".
  • the ready mixed and still thin resin batch is first applied to carrier foils.
  • One of these carrier foils is then passed under a cutting unit and, depending on the setting, cut into smaller pieces, which then fall onto the doctor-coated carrier foil due to the action of gravity. This results in an even distribution of the statistically oriented glass fibers.
  • thermoplastic matrix polypropylene is preferably used as the thermoplastic matrix.
  • GMT is preferably produced on so-called double belt presses, in which the matrix is melted in an extruder and inserted between two glass mats.
  • thermoplastic films are supplied as cover layers. To get a better one
  • fiber matrix impregnation the material is first kept in a heating zone at the level of the melting temperature and then cooled again under pressure.
  • multiaxial fabrics In order to achieve higher strengths of the fiber-plastic composite products, semi-finished thread products are used as multiaxial fabrics.
  • Such multiaxial fabrics can e.g. using a warp knitting machine with multiaxial weft insertion systems (System Liba).
  • the width of the fabric to be produced in this way is limited by the thread tension, so that when a certain maximum width is exceeded, the sagging of the fabric webs to manufacturing inaccuracies, etc. by shifting the individual fabric orientations against each other.
  • the placement of the reinforcing threads in the semi-finished thread can, e.g. in the so-called Malimo process can be achieved by displaceable group segments, the displaceability being small in the Malimo process.
  • a machine for producing prefabricated reinforcement scrims in which a web material runs between two belts provided with teeth, which hold threads to be laid down on the web material at their deflection points at a defined angle. Thereby it is possible to lay a laid scrim with threads crossing at a certain angle on the strip material and to fix them there in a suitable manner.
  • the conveyor belt also does not allow the threads to be held in a form-fitting manner.
  • DE-OS 1 635 481 discloses a machine for producing non-woven products with a fabric-like appearance (right-angled cross-hairs).
  • a number of threads are deposited in a direction essentially perpendicular to the direction of advance of the mat, it being equally possible to deposit the threads in a diagonal direction in order to be able to produce triangular stitches in addition to the square stitches which can usually be achieved by means of an additional warp thread .
  • a track is used, which consists of a textile sheet and has a large number of microscopic spikes.
  • such a textile web has the disadvantage that threads which are to be deposited at any angle and in a close position to one another, which is particularly necessary if the threads are to be deposited in accordance with the force flow, can no longer be held in a defined position.
  • the microscopic serrations thus serve at most to lay down the threads in a uniform geometric position and temporarily fix them there.
  • Uniform geometry is understood to mean laying down such that either square or triangular meshes, i.e. regular geometric figures are formed.
  • the machine for producing prefabricated reinforcement scrims in particular with a thermosetting or thermoplastic matrix according to the invention, has a feeding device for reinforcing fibers or reinforcing threads, a consolidating roller or double-belt pressing device or knitting machine, for example, arranged after the feeding device for reinforcing fibers, and a winding device for the reinforcing scrim.
  • a feeding device for reinforcing fibers or reinforcing threads has a feeding device for reinforcing fibers or reinforcing threads, a consolidating roller or double-belt pressing device or knitting machine, for example, arranged after the feeding device for reinforcing fibers, and a winding device for the reinforcing scrim.
  • at least one conveyor belt is preferably arranged under the semi-finished thread, which is designed as a needle caterpillar with protruding macroscopic needles and carries and promotes the reinforcing fibers and fixes them before calendering or meshing.
  • a device for feeding a thread semi-finished product is preferably provided.
  • the semi-finished thread products which can also be impregnated with a thermoset or thermoplastic (prepreg fibers), are (pre) consolidated on the plastic-technical device (e.g. calender) arranged in front of the winding device to form a fiber-plastic composite.
  • thermoplastic prepregs A further advantage in the production of thermoplastic prepregs is that an active unit for knitting the semi-finished thread can be dispensed with, since the calender or the consolidating device serves to fix the semi-finished thread.
  • the needle bead is either arranged continuously over the entire width, or two or more needle beads are arranged next to one another at the same height under the semi-finished thread product.
  • the needle bead has on its side facing the semifinished product a plurality of needles which are preferably evenly spaced apart.
  • the needles are preferably inclined by a defined angle in the conveying direction of the semi-finished thread in order to simplify the triggering of the semi-finished fiber.
  • the needle caterpillar and the calender roller device can preferably be driven synchronously. So that the reinforcing fibers to be fed into or to be installed in the material can be deposited on the conveyor belt in accordance with the flow of force, the feed device for the reinforcing fibers is displaceable transversely to the conveying direction of the semi-finished thread.
  • a fleece 2 runs over a needle bead 1, which is supported by the entire width of the fleece 2 and by which at the numerous needles 12 attached to the fleece 2 side also act as a conveyor belt.
  • a laying unit 4 is provided which is movable in a direction transverse to the conveying direction of the fleece 2 and which is fed with reinforcing threads or fiberglass roving 11 through a gate 5.
  • the needles 12 arranged on the needle caterpillar 1 serve to fix the reinforcing threads 11.
  • the reinforcing threads 11 can be deposited in accordance with the flow of force in the final product to be produced later from the prepreg product 10.
  • a counterpressure plate 9 designed as a counter-holding device is provided in the area of the laying unit 4 under the needle bead 1.
  • a pressure roller is provided in the area of the roller 15 arranged behind it in the conveying direction of the fleece 2 for driving the needle bead 1. around which another fleece 3 is fed and pressed to fix the deposited reinforcing threads 11.
  • a stripping device 8 In order to prevent the fleece carried on the needle tips (or the fleece 2, the reinforcing threads 11 and the fleece 3) from running around the roller driving the needle bead 1, a stripping device 8 is provided.
  • This stripping device 8 prevents the relatively loose composite material consisting of two nonwoven layers 2, 3 and the reinforcing threads 11 defined between them from rotating around the roller 15 driving the needle bead 1 or the deflecting roller 14.
  • the relatively loose material is fed directly from the stripper 8 to the calender 6, which consists of two heatable rollers.
  • the heatable rollers introduce heat into the material, which causes the thermoplastic fleece to melt, so that a so-called prepreg product is formed on the side located in the conveying direction after the calender 6 and is wound up on a winding device 7.
  • Fig. 2 shows the basic machine arrangement of the main components of the machine according to the invention in side view.
  • a semi-finished product in the form of a fleece runs on this plane over the needle bead 1 carried by the drive roller 15 and the deflection roller 14.
  • the thread semi-finished product / the fleece is applied to the needle bead 1 and in Conveyed away.
  • the reinforcement threads 11 are deposited on the thread semifinished layer running on the reference plane B via a device 4 for feeding reinforcement fibers.
  • a corresponding counter-pressure plate 9 is arranged under each corresponding feed device.
  • the thread semifinished layer with the already deposited glass fiber rovings is placed glass fiber rovings such as this, a further layer of reinforcing threads deposited from the first roving layer deposited.
  • a laying system for fleece 3 with corresponding pressure rollers and a counterpressure device 9 arranged underneath can also be arranged.
  • the temperature of the calender rolls 6 is set so that a consolidated bond between the semi-finished fiber products and the matrix is achieved.
  • This prepreg product 10 reaches the winding device 7 from the calender rolls or consolidating rolls 6.
  • Fig. 3 a top view of the arrangement described in Fig. 2 is shown and without the materials supplied, i.e. the thermoplastic semi-finished thread and the supplied reinforcing threads are shown.
  • the needle bead 1 has a width which is sufficient to fully support the fleece 2 to be fed (see FIG. 1).
  • This needle caterpillar 1 is driven by a drive roller 15, from which a deflecting roller 14 is arranged at a distance, so that the needle caterpillar 1 rotates as an endless conveyor belt around these two rollers 14, 15.
  • the needle bead 1 On the outward-facing side of the conveyor belt, ie the side facing the fleece 2 (see FIG. 1), based on the machine arrangement, the needle bead 1 has a multiplicity of substantially evenly spaced projecting needles 12.
  • the needles 12 are inclined forward in the conveying direction at a certain angle.
  • any width of such a needle bead can be used.
  • the width of the needle bead preferably exceeds 1 but not 3 m.
  • the distance between the individual needles 12 is preferably 1 to 3 mm, but can also have a greater distance from one another depending on the semi-finished thread.
  • the needles have a height of ⁇ 3 mm in order to ensure that the reinforcing fibers are safely deposited on the needle bead.
  • a needle height it is possible to reliably fix reinforcing fibers of customary varying thickness on the needle bead, the distance between the individual needles depending on the accuracy or achievable curvature including the consideration of the thread size.
  • the smaller the distance between the needles the more precisely the reinforcing fibers can be laid down in a manner that suits the flow of force.
  • the maximum thickness decreases, up to which the reinforcing fibers can still be reliably deposited in the spaces between the needles.
  • the laying carriage 4 is moved with the feeding device for the reinforcing threads 11 in a direction which essentially perpendicular to the conveying direction of the prepreg product and essentially parallel to it.
  • a placement roller 13 arranged on the laying carriage 4 can be pivoted. Different angles ⁇ can thereby be generated.
  • "Laying down according to the flow of force” should be understood to mean that the reinforcing fibers are arranged on the needle bead in such a way that, in the position fixed by the needle bead within a fiber-plastic composite, they maintain or maintain the position which corresponds to the lines of force on which the forces which are introduced into the later component are passed on in the component.
  • "laying down in accordance with the flow of force” is to be understood to mean that the reinforcing fibers can be laid down in such a way that a reinforcement of the component to be produced later, in particular around openings, i.e. in the region of the edge of the component facing the opening.
  • the method described and the device for carrying out the method are thus easily usable for fiber-plastic composites in which certain openings or openings are already provided in the semi-finished product, in which the edge of the openings is reinforced by means of the reinforcing fibers.
  • An essential area of application for components manufactured in this way is e.g. in the production of vehicle body components, which naturally have numerous openings to be reinforced locally.
  • the feed device 4 for the reinforcing fibers 11 in such a way that the reinforcing fibers are arranged within the framework of the fiber-plastic composite in such a way that, after processing of the semi-finished product into the end product, they are arranged in a spatial manner in the spatial component.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Reinforced Plastic Materials (AREA)
  • Nonwoven Fabrics (AREA)
EP96111444A 1995-07-17 1996-07-16 Maschine zur Herstellung vorkonfektionierter Verstärkungsgelege Withdrawn EP0754794A2 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19526000 1995-07-17
DE19526000 1995-07-17
DE19624912 1996-06-21
DE19624912A DE19624912C2 (de) 1995-07-17 1996-06-21 Maschine zur Herstellung vorkonfektionierter Verstärkungsgelege

Publications (2)

Publication Number Publication Date
EP0754794A2 true EP0754794A2 (de) 1997-01-22
EP0754794A3 EP0754794A3 (enrdf_load_stackoverflow) 1997-01-29

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Application Number Title Priority Date Filing Date
EP96111444A Withdrawn EP0754794A2 (de) 1995-07-17 1996-07-16 Maschine zur Herstellung vorkonfektionierter Verstärkungsgelege

Country Status (2)

Country Link
US (1) US5788804A (enrdf_load_stackoverflow)
EP (1) EP0754794A2 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011144296A1 (de) * 2010-05-20 2011-11-24 Daimler Ag Fertigungsvorrichtungen und -verfahren für faser-vorformlinge und faser-kunststoff-verbund-bauteile

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WO1998021034A1 (en) * 1996-11-15 1998-05-22 Brigham Young University Damped composite structures with fiber wave patterns and method and apparatus for making same
US5958322A (en) 1998-03-24 1999-09-28 3M Innovation Properties Company Method for making dimensionally stable nonwoven fibrous webs
US7187412B1 (en) * 2000-01-18 2007-03-06 Hewlett-Packard Development Company, L.P. Pointing device for digital camera display
US6969441B2 (en) 2000-05-15 2005-11-29 Kimberly-Clark Worldwide, Inc. Method and apparatus for producing laminated articles
US6833179B2 (en) 2000-05-15 2004-12-21 Kimberly-Clark Worldwide, Inc. Targeted elastic laminate having zones of different basis weights
US8182457B2 (en) 2000-05-15 2012-05-22 Kimberly-Clark Worldwide, Inc. Garment having an apparent elastic band
US6939334B2 (en) 2001-12-19 2005-09-06 Kimberly-Clark Worldwide, Inc. Three dimensional profiling of an elastic hot melt pressure sensitive adhesive to provide areas of differential tension
US6902796B2 (en) 2001-12-28 2005-06-07 Kimberly-Clark Worldwide, Inc. Elastic strand bonded laminate
US7335273B2 (en) 2002-12-26 2008-02-26 Kimberly-Clark Worldwide, Inc. Method of making strand-reinforced elastomeric composites
US7316840B2 (en) 2002-07-02 2008-01-08 Kimberly-Clark Worldwide, Inc. Strand-reinforced composite material
US7015155B2 (en) 2002-07-02 2006-03-21 Kimberly-Clark Worldwide, Inc. Elastomeric adhesive
US7316842B2 (en) 2002-07-02 2008-01-08 Kimberly-Clark Worldwide, Inc. High-viscosity elastomeric adhesive composition
US6978486B2 (en) 2002-07-02 2005-12-27 Kimberly-Clark Worldwide, Inc. Garment including an elastomeric composite laminate
US20040227954A1 (en) * 2003-05-16 2004-11-18 Tong Xie Interferometer based navigation device
US7601657B2 (en) 2003-12-31 2009-10-13 Kimberly-Clark Worldwide, Inc. Single sided stretch bonded laminates, and methods of making same
US7268341B2 (en) * 2004-05-21 2007-09-11 Silicon Light Machines Corporation Optical position sensing device including interlaced groups of photosensitive elements
US20060121805A1 (en) * 2004-12-07 2006-06-08 Krulic Charlie B Non-woven, uni-directional multi-axial reinforcement fabric and composite article
US20090101294A1 (en) * 2007-10-23 2009-04-23 Fairfield Processing Corp. Process for making bamboo fiberfill and articles thereof
DE102010002844A1 (de) * 2010-03-13 2011-09-15 Dieffenbacher Gmbh + Co. Kg Verfahren, Anlage und Harzmatte zur Herstellung von faserverstärkten Formteilen in einer Formpresse
US9494387B2 (en) 2013-06-28 2016-11-15 Absecon Mills, Inc. Antiballistic fabric

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
WO2011144296A1 (de) * 2010-05-20 2011-11-24 Daimler Ag Fertigungsvorrichtungen und -verfahren für faser-vorformlinge und faser-kunststoff-verbund-bauteile

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Publication number Publication date
EP0754794A3 (enrdf_load_stackoverflow) 1997-01-29
US5788804A (en) 1998-08-04

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