EP2637841A1 - Procédé et dispositif pour la fabrication d'une préforme tridimensionnelle dans le cadre de la fabrication d'éléments moulés renforcés de fibres - Google Patents

Procédé et dispositif pour la fabrication d'une préforme tridimensionnelle dans le cadre de la fabrication d'éléments moulés renforcés de fibres

Info

Publication number
EP2637841A1
EP2637841A1 EP11779464.4A EP11779464A EP2637841A1 EP 2637841 A1 EP2637841 A1 EP 2637841A1 EP 11779464 A EP11779464 A EP 11779464A EP 2637841 A1 EP2637841 A1 EP 2637841A1
Authority
EP
European Patent Office
Prior art keywords
fiber fabric
draping
fabric stack
mold
shell
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Withdrawn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
EP11779464.4A
Other languages
German (de)
English (en)
Inventor
Matthias Graf
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.)
Dieffenbacher GmbH Maschinen und Anlagenbau
Original Assignee
Dieffenbacher GmbH Maschinen und Anlagenbau
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 Dieffenbacher GmbH Maschinen und Anlagenbau filed Critical Dieffenbacher GmbH Maschinen und Anlagenbau
Publication of EP2637841A1 publication Critical patent/EP2637841A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/40—Shaping or impregnating by compression not applied
    • B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
    • B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B11/00—Making preforms
    • B29B11/14—Making preforms characterised by structure or composition
    • B29B11/16—Making preforms characterised by structure or composition comprising fillers or reinforcement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
    • B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
    • B29C70/22—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure
    • B29C70/222—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure the structure being shaped to form a three dimensional configuration

Definitions

  • the invention relates to a method for producing a three-dimensional preform in the course of the production of fiber-reinforced molded parts according to the preamble of patent claim 1 and an apparatus for producing a three-dimensional preform in the course of the production of
  • a first process step semi-finished fiber products are produced.
  • multi-layered fabrics or fiber fabrics are usually combined in 2D, ie substantially in one plane, so that the semifinished fiber product essentially already has the necessary outer contours and in some cases even special layers or layer thicknesses.
  • a binder is introduced into the parting lines of the scrim, which leads after its activation and curing to a fixation of the layers to each other and the draped 3D contour.
  • Layers then transferred into a forming tool and usually under pressure by closing the forming tool so far approximated the contour of the subsequent molding and hardened by activating the binder (heating and cooling), so that the semi-finished fiber endkonturnah inserted into a tool of a press for performing the RTM process itself can be.
  • the semifinished fiber product is still cut or punched at predetermined locations in order to obtain an even more precise contour.
  • the fiber-reinforced plastic component can be removed from the mold.
  • Semi-finished fiber is the basis for success in the production of a plastic component. It has been found that the prior art describes a variety of ways to produce a preform, but usually exhausted in the manual or automated production of the most flat fiber fabric stack, which in a press finally from its 2D shape into a 3D shape is transferred. This can be done in a pre-fixed (eg sewn) or even in a flexible state. The aim is to obtain a preform after shaping that is rigid enough to be fully automated and reliable in the tool of an RTM press can be inserted or can be transported and stacked until further use. For the production, transformation and fixation of the preform, there are a variety of possibilities in the relevant prior art, such as
  • EP 0 620 091 B1 The process disclosed in this patent has been proven, but shows a variety of process steps to produce a three-dimensional preform.
  • the object of the invention is to specify a method and a device with which three-dimensional preforms can be produced more quickly and more easily from two-dimensional fiber fabric stacks than in the prior art. Furthermore, it should be possible to produce highly complex preforms with significantly better precision to produce converted fiber fabric stack, which in particular the
  • Fibrous tissue stack concerns so that wrinkling and distortion can be successfully prevented.
  • the solution of the problem consists for the method according to the characterizing features of claim 1 in that a fiber fabric stack between a draping and a mold shell is placed or formed there, that then at least one Drapiertechnikzeug is extended from the draping and thereby at least partially into the fiber fabric stack in the Mold shell brings in up to the fiber fabric pile by means of this
  • Draping tool is pressed to the shell mold and fixed there,
  • Flow behavior of the fiber fabric stack results.
  • the flow behavior is dimensioned so that wrinkles and / or cracks are avoided during the introduction of the fiber fabric stack in the mold shell.
  • the following draping tools are selected from the first draping tool in the direction of the outer or inner contour, in order to enable subsequent flow of these contours, that is, the sides.
  • the solution of the task for the device is according to the features of claim 15 in that in the draping device at least two
  • Fiber cloth stack proposed, wherein means for introducing hot and / or cold air are arranged in the fiber fabric stack in the shell mold. Alternatively or cumulatively, in the mold shell as
  • Temperature elements Peltier elements for heating and / or cooling of the fiber fabric stack and / or the supplied air to be arranged.
  • the method and apparatus are used for 3D deformation of multilayer 2D blanks of fiber webs.
  • 3D deformation of multilayer 2D blanks of fiber webs are the following
  • Fiber webs or webs are unwound from a roll and, as required, made up of a plurality of different webs or lay-ups, shapes and sizes to make a fiber web stack. It may be necessary to adjust the external and, if necessary,
  • the pattern is generated from a development of the preform or the final component.
  • the created fiber fabric stack is then deposited on the support table of the draping device. Alternatively, it can also be provided to produce the fiber fabric stack from individual or pre-composed fiber fabrics directly on the support table.
  • a binder material is sprinkled, applied or sprayed between the individual layers. Subsequently, the shell mold is pivoted or moved over the fiber fabric stack.
  • the individual kinematics of components such as the shell mold is not the focus of the solution according to the invention, but rather the overall concept, which causes the upper shell mold to swing over the fiber fabric stack.
  • the two main components Drapiervorraum and form shell could also be arranged to each other movable at a distance. Then the draping tools are moved from bottom to top around the
  • This is preferably carried out under NC control and has an order and speed of the draping tools matched to the fiber fabric stack or the shell mold.
  • Fiber fabric stack and the support table or the Drapierwerkmaschineen provide an intermediate band.
  • the intermediate band can be a drapable textile layer or a plastic band, which can preferably be held taut by means of a pulling device via deflection rollers, in particular during the introduction of the fiber tissue stack into the shell mold.
  • Drape tools when retracting the Drapierwerkmaschinee held in the shell mold between the intermediate belt and the Drapierwerkmaschineen so that the fiber fabric stack remains as stable as possible in itself.
  • the mold shell Before, during or after the pivoting operation of the draping device with the mold shell, the mold shell can be heated to activate the binder or a resin layer for bonding within the fiber fabric stack.
  • a thermoplastic binder material for example, for heating (liquefaction of the binder) and then cooled (solidification of the binder).
  • Fiber cloth stack can retract the drapery tools back into the support table and the drapery device is returned to one
  • the intermediate belt can be relaxed depending on the requirement.
  • the mold shell is also pivoted again for the next forming process in the direction of the draping device. And the next one
  • Forming process can begin.
  • Transports to use preferably using several shells in the system use.
  • Draping device are placed, followed by a mold shell is moved so in a receiving position that the fiber fabric stack is between the support table and the shell mold, then at least one Drapiertechnikzeug is extended from the support table substantially against the weight and thereby the fiber fabric stack is at least partially introduced into the shell mold that after insertion into the mold shell the draping device
  • Receiving position for receiving a further fiber fabric stack is pivoted and that the mold shell of the draping device is pivoted after removal or delivery of the at least partially cured preform in the receiving position.
  • the fiber fabric stack can be fixed stress-relieved or with a specifically defined tension.
  • the fiber fabric stack is flat on the
  • one or more locating punches will extend and pinch the fibrous tissue stack at the location where no displacements are to take place, after which foam draping tools finally terminate
  • Foam moldings are designed so that is not clamped on the side walls of the shell of the fiber fabric pile, but is free to move and can slide from the sides as desired. after the
  • friction means or, for example, just foams are arranged on the side of the shell mold at predetermined locations. He comes
  • Forming be controlled precisely. Depending on the complexity of the component can be described with the above
  • Draping tools and / or Fixierstempeln be carried out step by step.
  • the resulting relative movements between Drapierwerkmaschine and fiber fabric stack can be kept away from the fiber fabric stack and thereby undesirable
  • the intermediate band is specifically stretched and relaxed, for example, with traction devices. So can, for. B. when pulling back the Drapiertechnikmaschinee, the voltage can be reduced or switched off to avoid contact pressure at the deflection. The mold tips can finally over as foam form body
  • the support table is in the form of a matrix with this
  • Drape tools provided, either as a draping tool or
  • Fixierstempel can act. In connection with flexible foam moldings as a shaping tip on the draping tools, preferably with undersize relative to the contour, which only after contact with the face
  • stiffening of the fiber fabric stack it is also possible for the stiffening of the fiber fabric stack to fix these at least partially by means of seams to be introduced. This is particularly useful when individual layers, storage packages and / or the
  • Fiber fabric stack itself formed according to the outer and / or the inner contour of the preform and then cut.
  • a curable binder is introduced between at least two layers of the fiber fabric stack during the folding, wherein accordingly the fiber fabric stack consists of at least two layers and
  • At least one layer is cut from a roll.
  • An optional intermediate band may be arranged between the fiber fabric stack and the shell mold and / or the draping device.
  • a mold shell preferably has means for the introduction of hot and / or cold air in the fiber fabric stack, for example, from at least one Peltier element for heating and / or for cooling the
  • Fiber tissue stack can exist.
  • the shape tip can essentially adapt to the contour of the mold shell present at the contact surface when expanding from the first to the second contact surface.
  • a mold tip is used, which is made larger in its cross section on the side of the fiber fabric stack than on the side of the draping device.
  • the mold tip is designed as a fluid-changeable membrane.
  • a mold tip proportionally of foam and a material harder with respect to the foam can be used.
  • a first contact surface is formed when the shape of the tip
  • the second contact surface is formed when the fiber fabric stack is pushed by the shaping tip in the direction of the shell mold, wherein the contact surface may increase or remain constant during the displacement under certain circumstances.
  • the consequence that the mold tip is deformed. It forms a third contact surface, which arises only by the deformation of the mold tip and must be greater than or equal to the second contact surface before entering the
  • the shaping tip should therefore essentially assume the geometry of the component contour to be formed, wherein the undeformed shape of the molding tip, at least on the side surfaces (from the outer end in the direction
  • Draping device is made smaller in cross-section, so that when driving in the direction of the shell shape of the fiber fabric stack is not clamped between the mold tip side and the shell mold.
  • the shape tip should be at the for Mold shell corresponding surfaces smaller radii of curvature
  • the mold tip will be partly or almost completely applied to the mold shell by elastic and reversible deformation and the fiber fabric stack will be pinched.
  • the shaping tip can be embodied as an inflatable membrane or be adjustable with respect to its elastic deformability with other fluids. Also can thus adjust the contact pressure and / or even the temperature entry in the fiber fabric stack. Finally, the shaping tip can also be made of foam only partially and the remaining region made of a material harder than the foam.
  • Draping tool the subsequent extending Drapierwerkmaschinegnee from the fixing point in the direction of the outer or the inner contour
  • the actuators for moving the draping tools can be designed as a pressure or travel-controllable linear drive
  • Figure 1 shows a device for the production of preform lingen, consisting of a draping device with a support table and an associated shell mold in the receiving position, wherein the
  • Fiber fabric stack already finished formed on the support table for forming is ready
  • Figure 2 shows the deformation of the fiber fabric stack through the
  • Draping device in the receiving position for receiving a new fiber fabric stack, wherein an industrial robot for
  • Figure 5 shows another embodiment with a rotation angle to the
  • Draping device respectively the shell mold
  • Figure 6 is a plan view of a support table with the example
  • Figure 7 is an enlarged schematic sectional view through the
  • FIG. 8 shows the draping device according to FIG.
  • FIG. 9 the draping device according to FIG. 8 with extended one
  • Draping tools and deformed drapery tips for applying a contact pressure also laterally of the drape tips in a recess of the shell mold;
  • FIG. 10 shows, in a further exemplary embodiment, a draping device with drapery tips which can be changed in size by means of fluids;
  • Figure 1 1 is a further enlarged view of a Drapiertechnikmaschinees and a corresponding shape in a shell depression with a flexible abutment of the shell mold for fixing the fiber tissue stack in the middle of the recess during the
  • FIG. 12 shows the exemplary result after introduction of the
  • FIGS. 13 to 15 show an example of a varied drive
  • Draping tools with mold tips adapted to the mold shell Draping tools with mold tips adapted to the mold shell.
  • the figures show a device which is also used to carry out the
  • An exemplary apparatus 1 for the production of preforms 6 according to Figure 1 consists of a drapery device 2 with a support table 4 and an associated shell mold 5.
  • the fiber fabric stack 3 is already finished on the support table 4 ready for reshaping.
  • the draping tools 8 are in a retracted state within respectively below the support table 4, on which the fiber fabric stack 3 comes to rest due to the weight N, shown.
  • a particularly advantageous variant is located between the
  • Fiber fabric stack 3 and the support table 4 an intermediate band 7.
  • Das Intermediate belt 7 has the task here, between the Drapiertechnikmaschineen 8 as a connecting force introduction element for the transformation of
  • Fiber cloth stack 3 to serve and is for this reason also preferably via a traction device 9 tensioned and guided, for example via deflection rollers 13.
  • the draping tools 8 in the draping device 2 usually consist of linear conveyors, in this case piston-cylinder arrangements 15, which make it possible to adjust the ends of the form-fitting 5 respectively corresponding to the contour of the preform 6
  • the draping tools 8 can have flexible pressure elements, for example foams, which are preferably adapted in sections to the shape shell 5 or to the area of the shell 5 to which it is to be draped.
  • the printing elements have special shapes which, when pressed by the piston-cylinder assemblies 15, take on their shape
  • the draping device 2 is preferably arranged movably on a frame 10 fixedly connected to the floor via a pivot axis 12. Also, the shell mold 5 has a connection to the pivot axis 12 via a holder 1 1, so that the shell mold 5 and the draping device 2 are arranged synchronously about the pivot axis 12 pivotally.
  • Draping tools 8 by means of the piston cylinder assemblies 15, preferably against the weight N, extended from the support table 4 and press the fiber fabric stack 3 in the mold shell 5.
  • Intermediate belt 7 bridges possibly existing distances between the individual Drapierwerkmaschineen 8 and also ensures a backing of the smallest fiber fabric stack shares. At the same time, the intermediate band 7 useful due to the cleaning problem. However, the intermediate belt 7 can also be used in the sense of a conveyor belt for transporting the fiber fabric stack 3 out of and into the device 1 or onto the draping device 2.
  • Forming shell 5 is introduced, according to Figure 3, the pivoting about a pivot angle ⁇ of the entire device 1 (Drapiervorraum 2 with shell 5) to the frame 10, respectively the pivot axis 12, carried out from the receiving position to a curing and / or Auslegeposition.
  • the fiber fabric stack 3 is still fixed in the mold shell 5 by the draping device 2, whereby during the
  • the curing of the existing binder can be carried out partially or completely.
  • the draping device 2 it would also be conceivable for the draping device 2 to already start again after reaching a position of the form shell 5 in which the fiber fabric stack 3 is neatly draped and is held automatically in its position by the weight force N
  • Figure 5 shows a further embodiment in a before-after comparison, as with a rotation angle ⁇ rotation is performed so that after the draping ( Figure 5 left) with the shell mold 5 above the shell mold 5 is rotated by 180 ° and now below the Supporting table 4 is located, wherein during the rotation, the draping tools 8 extended the
  • Pivoting or turning by 180 ° represents the most advantageous solution, and there may be applications which may also require a smaller swing angle ⁇ . It should be emphasized, of course, that after pivoting the weight N the fiber fabric stack 3 is no longer on the
  • Draping device 2 or the support table 4, presses, but in the mold shell. 5
  • FIGS. 1 to 5 Even if the variant envisaged in FIGS. 1 to 5 appears to be the simplest and most uncomplicated, it may be necessary, for example, at higher production speeds to use a plurality of shell molds 5, which alternate with the reception of a fiber fabric stack 3 for partial or complete curing.
  • the shell molds 5 could also be provided as individually movable carrier shells, which drive in a separate curing device to complete the curing or even as a carrier to the transfer to a molding press for
  • the fixation can be done not only by heating the shell molds 5 and possibly also by cooling the same, but there are also other common
  • Auflagetisch 4 adjacent layer (a fabric or jelly) of the fiber fabric stack 3 is carried out substantially flat and continuous. Between at least two layers of the fiber fabric stack 3, at least partially, a curable binder can be introduced during the folding or already before.
  • FIG. 6 shows a plan view of a support table 4 with a possible variant of draping tools 8 and the optional intermediate belt 7 shown by dashed lines.
  • FIG. 7 shows, independently of an optionally occurring rotation of the
  • Draping device Possibilities for improved forming of
  • the optional intermediate band 7 for performing the draping highly recommended is, so that the fiber fabric stack 3 does not slip uncontrollably in the wells respectively in the contour of the shell mold 5 into it.
  • FIGS. 7 to 15 the illustration of the optional intermediate belt 7 has been dispensed with.
  • Fibrous pile 3 can be spent in a 3D contour. This should not get inadmissible train on the fiber fabric stack 3, otherwise the
  • Fiber fabric stack 3 in the shell mold 5 it is therefore important that parts of the fiber fabric stack 3 can flow almost free of tension.
  • a fixed point which may for example lie on a plane which is closest to the support table 4 or, on the contrary, can first be started with a deeper contour of the mold shell 5, which possibly causes the most retraction effects in the fiber fabric stack 3 becomes. If the fiber fabric stack 3, as shown in FIG. 7, is fixed at one point, in the middle of FIG. 7 with a fixing punch 17, follow in a predetermined sequence, preferably adjacent,
  • the draping tools 8 may have mold tips 16 which have and preferably have flexible properties
  • FIG. 8 now press the Drapiertechnikmaschinee 8 with the mold tips 16 a portion of the fiber fabric stack 3 in the recess of the mold shell 5.
  • the mold tips 16 are preferably designed as foam moldings so that on the lateral walls of the shell mold 5 of the fiber fabric stack 3 during retraction into the Contour is not clamped, but can slide freely.
  • parts of the fiber fabric stack 3 left and right are drawn into the contour.
  • the retracted areas of the fiber fabric stack 3 are visible on the edge of the support table 4 and are marked in their length with an E and in their feed direction with arrows.
  • FIG. 9 shows the advantage of flexible mold tips 16
  • Draping tools 8 When the drapery tools 8 are at the bottom of the contour the mold shell 5 impinge, a contact pressure on the
  • Piston cylinder assemblies 15 constructed and the mold tip 16 deforms, thereby avoiding the side and thus also pressed the fiber fabric stack 3 against the wall sections or other 3D contours of the shell mold 5.
  • this final state of the fiber fabric stack 3 is now held and activated, for example, a binder.
  • the resulting preform ling 6 easy to demold, the mold shell 5 to move up and remove the preform 6 from the drapery device 2.
  • the Fixierstempel 17 could this serve as a lifting device or ejector.
  • the rotation of the draping device 2 could for example take place without the shell mold 5 and used as "ejection" of the preform 6 lings.
  • Figures 1 1 and 12 show additional alternatives in the forming by means of a shell mold 5, in which a foam is embedded as an abutment 19 in a recess of the shell mold 5. This is useful if the fixed point should lie in the depression. This creates when retracting the mold tip 16 already has a back pressure, which prevents the
  • Fiber fabric stack 3 shifts uncontrollably at this point.
  • the abutment 19 is considered as a kind of compliant element of the form 5 switching. It also arises here the circumstance that by fixing to the first entering in contact point of the fiber fabric stack 3, this is forced to flow into the contour of the shell mold 5 or the portion of the contour, as well as the contour edges of the shell mold 5 only at the end of the extension process of the Drapiertechnikmaschinees 8 come into contact with the mold tip 16 ,
  • the counter-bearing 19 ' is designed so that it can muster in a relaxed form (when entering the Drapierwerkmaschinees 8 in the shell 5) enough back pressure for fixing the fiber fabric stack 3 during retraction, but at the latest at the end of retraction not too much pressure on the Fibrous pile 3 applies so that it is not damaged.
  • Fiber composite material 3) can be carried out step by step with the basic concept described above individual draping with individually controllable Drapiertechnikmaschineen 8. With an intermediate band 7 (foil and / or, textile), the resulting relative movements between
  • Draping tool 8 and fiber fabric stack 3 kept away from the fiber fabric stack 3 and thereby cracks or shifts within the
  • Fiber fabric stack 3 can be avoided.
  • the intermediate belt 7 can be tensioned and relaxed with a pulling device 9 targeted.
  • the voltage is switched off in order to avoid contact pressure at the deflection points.
  • FIGS. 13 to 15 again show an exemplary sequence of an advantageous forming of a fiber fabric stack 3
  • the fiber fabric stack 3 is fixed in the center by extending the central fixing punch 17 and pressing the fiber cloth stack 3 against the shell 5. However, this can also be carried out, for example, with a depression in the contour. Subsequently, in FIG. 14 the left Drapiertechnikmaschine 8 in the contour of the shell mold 5, so that the fiber fabric stack 3 is pressed into the left contour.
  • the fiber fabric stack 3 can flow from left to right until the contact between the mold tip 16 (left tool, right side) and the mold shell 5 occurs. Subsequently, the same is done with the right Drapiertechnikmaschine 8 ( Figure 15) and finally the pressure through the actuators so strong that deform the mold tips 16 and the fiber fabric stack 3 also to the
  • the contour of the shell 5 is as strong as possible and also reshaped as much as necessary.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Moulding By Coating Moulds (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un procédé et un dispositif pour la fabrication d'une préforme tridimensionnelle dans le cadre de la fabrication d'éléments moulés renforcés de fibres, ledit procédé étant mis en oeuvre au moyen d'un dispositif (1) comprenant au moins un dispositif de drapage (2) pour un empilement de tissu de fibres (3), et un moule (5) pour former la préforme (6) à partir de l'empilement de tissu de fibres (3) au moyen du dispositif de drapage (2). Le procédé est caractérisé par les étapes successives suivantes: un empilement de tissu de fibres (3) est positionné entre le dispositif de drapage (2) et le moule (5) ou est formé à cet endroit, au moins un outil de drapage (8) est ensuite avancé depuis le dispositif de drapage (2) en direction du moule (5), entraînant l'introduction au moins partielle de l'empilement de tissu de fibres (3) dans le moule (5), jusqu'à ce que l'empilement de tissu de fibres (3) soit pressé contre le moule (5) et y soit fixé, puis des outils de drapage (8) additionnels sont avancés seuls ou conjointement depuis le dispositif de drapage (2) en direction du moule (5), selon une séquence prédéterminée qui est déterminée par le comportement au fluage de l'empilement de tissu de fibres (3).
EP11779464.4A 2010-11-09 2011-11-09 Procédé et dispositif pour la fabrication d'une préforme tridimensionnelle dans le cadre de la fabrication d'éléments moulés renforcés de fibres Withdrawn EP2637841A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010043666A DE102010043666A1 (de) 2010-11-09 2010-11-09 Verfahren und Vorrichtung zur Herstellung eines dreidimensionalen Vorformlings im Zuge der Herstellung von faserverstärkten Formteilen
PCT/EP2011/069785 WO2012062828A1 (fr) 2010-11-09 2011-11-09 Procédé et dispositif pour la fabrication d'une préforme tridimensionnelle dans le cadre de la fabrication d'éléments moulés renforcés de fibres

Publications (1)

Publication Number Publication Date
EP2637841A1 true EP2637841A1 (fr) 2013-09-18

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Application Number Title Priority Date Filing Date
EP11779464.4A Withdrawn EP2637841A1 (fr) 2010-11-09 2011-11-09 Procédé et dispositif pour la fabrication d'une préforme tridimensionnelle dans le cadre de la fabrication d'éléments moulés renforcés de fibres

Country Status (3)

Country Link
EP (1) EP2637841A1 (fr)
DE (1) DE102010043666A1 (fr)
WO (1) WO2012062828A1 (fr)

Families Citing this family (20)

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Publication number Priority date Publication date Assignee Title
DE102012200699A1 (de) * 2012-01-18 2013-07-18 Dieffenbacher GmbH Maschinen- und Anlagenbau Verfahren und Vorrichtung zur Herstellung eines dreidimensionalen Vorformlings aus einem Fasergelege im Zuge der Herstellung von faserverstärkten Formteilen
DE102013103039A1 (de) 2013-03-25 2014-09-25 Dieffenbacher GmbH Maschinen- und Anlagenbau Verfahren, Vorrichtung und Vorformling zur mehrstufigen Herstellung eines dreidimensionalen Vorformlings im Zuge der Herstellung von faserverstärkten Formteilen
DE102013007382B4 (de) 2013-04-26 2016-09-15 Volkswagen Aktiengesellschaft Vorrichtung zum Drapieren von flächigen Halbzeugen zur Herstellung eines Faserverbundwerkstoffs
DE102013109856A1 (de) 2013-09-09 2015-03-12 Dieffenbacher GmbH Maschinen- und Anlagenbau Verfahren und Vorrichtung zum Besäumen eines vorgefertigten Halbzeugs
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