WO2007076775A1 - Andrückvorrichtung mit einer andrückrolle - Google Patents

Andrückvorrichtung mit einer andrückrolle Download PDF

Info

Publication number
WO2007076775A1
WO2007076775A1 PCT/DE2006/002196 DE2006002196W WO2007076775A1 WO 2007076775 A1 WO2007076775 A1 WO 2007076775A1 DE 2006002196 W DE2006002196 W DE 2006002196W WO 2007076775 A1 WO2007076775 A1 WO 2007076775A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressing device
lamellae
pressure roller
slats
mold
Prior art date
Application number
PCT/DE2006/002196
Other languages
German (de)
English (en)
French (fr)
Inventor
Markus Steeg
Jens Schlimbach
Jens Lichter
Original Assignee
Institut Für Verbundwerkstoffe 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 Institut Für Verbundwerkstoffe Gmbh filed Critical Institut Für Verbundwerkstoffe Gmbh
Publication of WO2007076775A1 publication Critical patent/WO2007076775A1/de

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28Shaping operations therefor
    • B29C70/30Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • B29C70/38Automated lay-up, e.g. using robots, laying filaments according to predetermined patterns
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28Shaping operations therefor
    • B29C70/30Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • B29C70/34Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28Shaping operations therefor
    • B29C70/30Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • B29C70/38Automated lay-up, e.g. using robots, laying filaments according to predetermined patterns
    • B29C70/386Automated tape laying [ATL]
    • B29C70/388Tape placement heads, e.g. component parts, details or accessories

Definitions

  • the invention relates to a pressing device with a pressure roller for consolidating fibers, in particular fiber ribbons, in or on a close to final shape, which comprises a plurality of force-loaded, relative to each other in the radial direction movable slats.
  • Heavy - duty, continuously fiber reinforced plastic components with stress - oriented fiber orientation and positioning can be produced by depositing pre - impregnated endless fiber strands.
  • components made of thermoplastic fiber-plastic composites are often used fiber-reinforced plastic tapes, which are impregnated and consolidated in a separate, upstream process. These thermoplastic plastic tapes are heated directly before depositing to temperatures above the melting or softening range of the thermoplastic and adjusted and consolidated by means of a pressure roller at the point of deposition of the geometry of the component.
  • the geometry of the component is determined by a planar or curved structure, which is stored on.
  • Tape laying is also used in the local reinforcement of components. It proves to be problematic that the geometry of the component determined by a shape, in particular a negative shape, is limited by the fact that the theoretically possible discrete fiber orientations in complex curved components can not be realized by the rigid pressure roller. Convex and concave component bends cause a non-uniform, in part impossible contact pressure of the impregnated plastic tape on the mold, which inevitably involves consolidation deficits.
  • DE 102 53 300 A1 shows a method for producing structural components, in particular heavy-duty body components of a motor vehicle, with a plastic matrix material reinforced by glass fibers.
  • Targeted carbon fibers are at least partially provided according to load paths of the component in the loaded state, wherein the glass fibers are aligned arbitrarily.
  • the composite of glass fibers is cut substantially according to the component shape.
  • the application of the strip-shaped composite of targeted aligned carbon fibers on or between at least one glass fiber structure to a sandwich-like preform, which is inserted for pressing for component molding in a mold. This is disadvantageous in that such a mold is relatively expensive to manufacture.
  • each of the lamellae for applying the fibers to the geometry of the mold is subjected to such a force that regardless of their radial deflection, the same force acts on them.
  • the pressure roller Due to the flexible design of the pressure roller due to its lamellar structure, it is possible to press the pre-impregnated or non-prepreg fibers or tapes over the width of the pressure roller to the course of the component geometry determining form, in particular a negative mold, each lamella with approximately the same Force acting on the fibers, since all slats are also applied with almost the same force. In this case, only a constant and homogeneous distribution of the contact pressure and a homogeneous transition from curved to planar areas is to be ensured, whereby on the one hand the width of the pressure roller Ie and on the other hand, the radius of curvature of the form is limited.
  • the pressure roller can be used both in so-called thermoset tape laying and in thermoplastic tape laying.
  • the lamellae of which a plurality are present across the width of the pressure roller, act on the bands only over their width, whereby the adjustment problem is reduced to arbitrarily small individual inaccuracies, which are negligible in the limit case by the elasticity of the substrate to be pressed.
  • the magnetic field can preferably be generated to apply force to the lamellae.
  • the directly acted upon by a magnetic field fins are made of a magnetic, in particular ferromagnetic material.
  • an electrical conductor for generating the magnetic field is associated with the mold.
  • the stationarily arranged conductor can be integrated into the mold or, for example, can be arranged below the mold, which is in particular made of a non-magnetic material. Through the conductor, a magnetic field is generated in which the lamellae are acted upon with approximately the same normal force to the contact surface.
  • the electrical conductor for generating the magnetic field of the pressing device is assigned in an alternative embodiment.
  • the existing of a magnetic material slats are stored between voltage-loaded brushes.
  • the electrical conductor of the pressing device acts on the lamella associated actuating blades made of a ferromagnetic material, which press the existing of a non-magnetic material slats against the mold.
  • the actuating blades are set to drive the slats in the magnetic field in rotation. Both the actuating blades and the blades are freely movable in the radial direction to press the impregnated semi-finished product to the surface of the mold.
  • each lamella is associated with a cylindrical cross-section actuating blade.
  • the slats are rotatably mounted circumferentially between opposite bearing elements.
  • the actuating blades are arranged in a housing upper part, which is isolated from a housing supporting the slats lower part.
  • the magnetic field acts only on the actuating blades and the lamellae pressing the strips are made of an insulator or have on their surface an insulating material.
  • the lamellae are subjected to force by means of a fluid which flows in particular.
  • the fluid namely a gaseous or liquid medium
  • the fluid are directed through the interior of the fins or the lamella in an outer peripheral region, in which they are not in contact with the fibers to be pressed, flow around.
  • a corresponding pressurization of the fluid acts on the lamellae for their radial deflection.
  • the slats aligned parallel to one another have a cylindrical, in particular annular cross-section. Accordingly, the slats are rolled over their circumference and press the pre-impregnated ribbon to the surface of the mold.
  • the blades are preferably guided between circumferentially arranged plain bearings.
  • the lamellae are axially in one plane.
  • the lamellae consist of a plastic and / or a metallic, in particular magnetic, and / or a ceramic material.
  • slats made of different materials, for example alternately, in order to reduce the friction of adjacent slats.
  • the selection of the material for the lamella for example, depending on whether the fibers to be consolidated off heat and / or supplied.
  • the lamellae preferably have annular contact surfaces on the front side or intermediate lamellae with a provided opposite the lamella reduced diameter.
  • the intermediate blades can be made for example of a material with good sliding properties.
  • the object is achieved in a pressing device for consolidating fibers, in particular fiber ribbons, in or on a near-net shape, according to the invention in that the surface of the pressure roller consists of a flexible plastic.
  • the surface of the pressure roller consisting of a flexible plastic, for example a synthetic or natural elastomer, can be used together with the lamellae explained above or exclusively for equipping the pressure roller, wherein only the elastic properties of the plastic make it possible to adapt the pressure roller to the geometry of the mold, especially a negative form, determine.
  • the surface can be in the form of a tube, for example, with a spherical surface, manufactured and attached to the pressure roller.
  • the flexible and high temperature resistant plastic is a polytetrafluoroethylene (PTFE) and / or silicone material or a blend of these plastics or a gradient material.
  • a gradient material is to be understood as meaning a material which, for example, has different or varying properties over its thickness or width extent. The properties of the material can be known to affect in particular by fillers and / or surface coatings.
  • plastics with the same or different material properties are arranged in multiple layers and / or arranged next to one another.
  • the surface has a thin flexible metal layer.
  • the metal layer is thin like a film and can be made, for example, by vapor deposition.
  • a tempering device is provided.
  • the tempering device can be integrated in the pressing device or the pressure roller.
  • the tempering device comprises at least one controllable heat source and / or heat sink.
  • the tempering device tempered the pressure roller electrically or by means of a fluid. As the fluid is both air and gas or a liquid into consideration, wherein the fluid flows through the core or the interior of the pressure roller.
  • Different crystallinities of the polymers also lead to different characteristics of the E-modules over the temperature profile.
  • a radial view can be adjusted through the choice and the morphology of the polymeric material on the temperature gradient through the Andrückbelag the pressure roller through the desired material behavior, which in turn directly affects the mechanical and physical behavior of the pressure device.
  • This relationship also applies to the cross-sectional profile in the axial direction.
  • the temperature gradient can be influenced, for example via different heat transfers, specific heat capacities and / or crystallinities.
  • a multi-dimensional temperature dimensionally dependent properties of the polymer such as multidimensional modulus of elasticity moduli, can be converted into final mechanical and physical behavioral characteristics of the pressure device.
  • a multi-axis handling device moves the pressing device over the mold.
  • a measurement and control device is provided, which is preferably coupled to an external heat source and in particular detects and regulates temperatures of the pressure roller and / or the mold, a contact pressure and / or a travel speed of the pressure roller.
  • the pressure roller can consolidate self-regulating properties to consolidate fiber matrix composites. If, for example, a short-term increase in force occurs in the so-called nip point directly below the pressure roller when applying the fiber matrix composites, the contact surface increases in the short term, which is associated with a heat flow distributed over a larger area. This leads to a change in the amount of heat transferred within the system in contact, which is accompanied by a change in the E-modules, which affects the surface pressure and leads to a change in the contact surface.
  • the measuring and control device adjusts itself to a "dynamic" control loop, which carries the disturbance variables of force fluctuations (about +/- 50 N) and temperature fluctuations which are introduced into the system by the external heating source, which is, for example, a main heating of the process
  • the self-regulating consolidation system may vary depending on the set specific heat capacities, Kraftbeauschlagung, the surface texture, the surface topography, the layer structure and / or the selection of the flexible, high temperature resistant plastic, the surface pressure is a control variable.
  • the manipulated variables heat supply, application of force, choice of material, material arrangement or material geometry can be adjusted.
  • FIG. 1 shows a representation of a pressure roller of a pressure device according to the invention with a planar shape
  • FIG. 2 is a sectional view of the pressure roller according to the line A-A of FIG. 1,
  • FIG. 3 is a schematic sectional view of a pressing device according to the invention in a first alternative embodiment
  • FIG. 4 is a sectional view of the pressure roller of FIG. 4 with a convex shape
  • FIG. 5 shows a sectional view of the pressure roller according to FIG. 4 with a concave shape
  • FIG. 6 is a schematic sectional view of the pressure device in a second alternative embodiment
  • FIG. 7 is a sectional view of the pressure roller according to the line A-A of FIG. 6 and
  • FIG 8 is a schematic sectional view of the pressing device in a third alternative embodiment.
  • the pressing device comprises a pressure roller 1 for consolidating pre-impregnated fiber ribbons 2, which are deposited on a near-net shape 3 to a semifinished fiber product.
  • the pressure roller 1 according to FIGS. 1 and 2 has a geometry-adaptive surface 4 made of an elastic plastic, which is held in the form of a hose 5 exchangeably on a roller 6 mounted on a ball.
  • the pressure roller 1 is composed of a plurality of mutually parallel slats 7, which are mounted according to the double arrow 8 in the radial direction relative to each other displaceable and rotatable in a housing 9.
  • a voltage-charged conductor 10 is arranged to generate a magnetic field.
  • the fins 7 are made of a ferromagnetic material and arranged between two housing-side slide bearings 11.
  • intermediate plates 12 are provided with a reduced diameter relative to the fins 7.
  • the mold 3 is made of a non-magnetic or non-magnetizable material.
  • FIGS. 6 and 7 of the ⁇ ndrückvorraum electrical conductors 10 are assigned to generate the magnetic field.
  • pressure roller 1 receiving housing 9 the voltages Ul and U2 frontally applied to the slats 7.
  • the brushes 13 At the periphery of the rotatable blades 7 are located on the housing side mounted opposite brushes 13 with associated sliding bearings 11, wherein the brushes 13 also a voltage U3 is applied to generate a magnetic field to act on the blades 7 in the direction of arrow F with a force.
  • the electrical conductor 10 of the pressing device generates a magnetic field in the housing 9, wherein the direction of magnetic flux is represented by the arrow H, for applying ferromagnetic actuating blades 14, which in turn made of a non-magnetic material slats 7 against the press in the form 3 lying fiber ribbon 2.
  • the fins 7 are guided between the opposite plain bearings 11.
  • the Lamel ⁇ len receiving housing lower part 15 is compared to the housing ⁇ seoberteil 16 with the actuating blades 14 separated by an insulator 17.
PCT/DE2006/002196 2005-12-13 2006-12-09 Andrückvorrichtung mit einer andrückrolle WO2007076775A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005059985.0 2005-12-13
DE102005059985 2005-12-13

Publications (1)

Publication Number Publication Date
WO2007076775A1 true WO2007076775A1 (de) 2007-07-12

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Application Number Title Priority Date Filing Date
PCT/DE2006/002196 WO2007076775A1 (de) 2005-12-13 2006-12-09 Andrückvorrichtung mit einer andrückrolle

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WO (1) WO2007076775A1 (ja)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1911569A1 (en) * 2006-10-10 2008-04-16 Accudyne Systems, Inc. A tape placement head and a method for applying thermoplastic tape to an object
WO2014040871A1 (de) * 2012-09-11 2014-03-20 AFPT GmbH Andruckrolle zum ablegen von bahnförmigem halbzeug
US8863805B2 (en) 2009-02-16 2014-10-21 Airbus Operations Gmbh Pressing-on device for pressing on fiber-reinforced thermoplastic materials, fiber arranging device, and method for arranging a fiber-reinforced thermoplastic material
EP3705280A1 (de) * 2019-03-08 2020-09-09 Deutsches Zentrum für Luft- und Raumfahrt e.V. Fertigungsanlage und verfahren zur herstellung eines faserverbundbauteils

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0411995A2 (fr) * 1989-08-03 1991-02-06 AEROSPATIALE Société Nationale Industrielle Dispositif applicateur pour machine de nappage au moyen de ruban de matière composite
US4992133A (en) * 1988-09-30 1991-02-12 Pda Engineering Apparatus for processing composite materials
US5454897A (en) * 1994-05-02 1995-10-03 Cincinnati Milacron Inc. Presser member for fiber laying machine
US5587041A (en) * 1995-03-21 1996-12-24 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Composite prepreg application device
US6390169B1 (en) * 2000-02-23 2002-05-21 The Boeing Company Conformable compaction apparatus for use with a fiber placement machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4992133A (en) * 1988-09-30 1991-02-12 Pda Engineering Apparatus for processing composite materials
EP0411995A2 (fr) * 1989-08-03 1991-02-06 AEROSPATIALE Société Nationale Industrielle Dispositif applicateur pour machine de nappage au moyen de ruban de matière composite
US5454897A (en) * 1994-05-02 1995-10-03 Cincinnati Milacron Inc. Presser member for fiber laying machine
US5587041A (en) * 1995-03-21 1996-12-24 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Composite prepreg application device
US6390169B1 (en) * 2000-02-23 2002-05-21 The Boeing Company Conformable compaction apparatus for use with a fiber placement machine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1911569A1 (en) * 2006-10-10 2008-04-16 Accudyne Systems, Inc. A tape placement head and a method for applying thermoplastic tape to an object
US7404868B2 (en) 2006-10-10 2008-07-29 Accudyne Systems, Inc. Tape placement head for applying thermoplastic tape to an object
US8863805B2 (en) 2009-02-16 2014-10-21 Airbus Operations Gmbh Pressing-on device for pressing on fiber-reinforced thermoplastic materials, fiber arranging device, and method for arranging a fiber-reinforced thermoplastic material
WO2014040871A1 (de) * 2012-09-11 2014-03-20 AFPT GmbH Andruckrolle zum ablegen von bahnförmigem halbzeug
EP3705280A1 (de) * 2019-03-08 2020-09-09 Deutsches Zentrum für Luft- und Raumfahrt e.V. Fertigungsanlage und verfahren zur herstellung eines faserverbundbauteils

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