WO2012136391A1 - Dispositif et procédé de fabrication de préformes à fibres constituant notamment une phase préalable dans la fabrication de composants plastiques renforcés par fibres - Google Patents

Dispositif et procédé de fabrication de préformes à fibres constituant notamment une phase préalable dans la fabrication de composants plastiques renforcés par fibres Download PDF

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Publication number
WO2012136391A1
WO2012136391A1 PCT/EP2012/051287 EP2012051287W WO2012136391A1 WO 2012136391 A1 WO2012136391 A1 WO 2012136391A1 EP 2012051287 W EP2012051287 W EP 2012051287W WO 2012136391 A1 WO2012136391 A1 WO 2012136391A1
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WO
WIPO (PCT)
Prior art keywords
rovings
yarns
grippers
yarn
yarn transfer
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.)
Ceased
Application number
PCT/EP2012/051287
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German (de)
English (en)
Inventor
Marco Göttinger
Michael Kaiser
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Voith Patent GmbH
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Voith Patent GmbH
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Filing date
Publication date
Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of WO2012136391A1 publication Critical patent/WO2012136391A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
    • B29C70/541—Positioning reinforcements in a mould, e.g. using clamping means for the reinforcement
    • 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
    • B29C70/28—Shaping operations therefor
    • B29C70/30—Shaping 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
    • B29C70/38—Automated lay-up, e.g. using robots, laying filaments according to predetermined patterns
    • B29C70/382—Automated fiber placement [AFP]
    • 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
    • B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
    • B29C70/56—Tensioning reinforcements before or during shaping
    • 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
    • B29C70/20—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in a single direction, e.g. roofing or other parallel fibres
    • B29C70/205—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in a single direction, e.g. roofing or other parallel fibres the structure being shaped to form a three-dimensional configuration
    • B29C70/207—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in a single direction, e.g. roofing or other parallel fibres the structure being shaped to form a three-dimensional configuration arranged in parallel planes of fibres crossing at substantial angles

Definitions

  • the invention relates to an apparatus for the production of fiber preforms, which in particular constitute a precursor in the production of fiber-reinforced plastic components, the apparatus having a plurality of unwinding stations for providing a plurality of yarns or rovings, a plurality of grippers, each having one or more yarns or rovings on its Beginning, and having at least a first forming tool, each gripper being reciprocally movable on a path between a maximum position and a picking position, and wherein the picking position is provided at a yarn transfer point and closer to the unwinding station than the maximum position.
  • the invention relates to a process for the production of fiber preforms which, for example, represent a precursor in the production of fiber-reinforced plastic components, in particular using a device according to the invention, which has the following process steps in succession:
  • Fiber-reinforced plastic consists of matrix material, which among other things gives the rigidity and of fibers, which are embedded in the matrix material and which among other things provide the tensile strength. Fiber-reinforced plastic is used especially for heavily loaded components, which should still be as light as possible. Since the fibers impart no strength in the transverse direction, the fibers must be aligned so that their longitudinal direction coincides as well as possible with the respective loading direction. To achieve this, the fibers often have to be laid in different directions. The better and more precisely the fiber layer is adapted to the load, the better the component will be. For components made of fiber-reinforced plastic, there are numerous manufacturing processes. For the production of large numbers of well-applicable methods, however, there are currently only with rotationally symmetrical or plate- or strand-shaped components by winding or plate or extrusion.
  • Both for the production of the fiber preforms and for the impregnation and / or curing of the components molding tools can be used according to the desired component shape, on or in which the Faservorform ling or the component is placed and / or pressed.
  • the fiber preforms have sufficient dimensional stability for further processing, they are provided with small amounts of adhesive or binder and fixed after the three-dimensional draping, for example by drying or by heating and cooling.
  • the fiber preforms are usually created by superimposing and fixing of prefabricated and pre-bonded flat semi-finished products.
  • Such semi-finished products are for example tapes or fabrics, scrims or nonwovens in which a multiplicity of individual yarns or rovings are already woven, sewn or glued into a flat structure.
  • a yarn is referred to when using so-called continuous fibers, ie when the fibers are unwound from a coil or a ball.
  • Numerous yarns that are untwisted simultaneously from a spool or from a ball are called yarn bundles or roving.
  • the rovings can consist of up to several ten thousand single yarns, which are also called filaments.
  • the required individual parts are cut from the flat semifinished product, which is usually available as a roll product, according to a kind of pattern, as is known from DE 10 2008 011 658 A1. Then they are placed over a mold and connected or pressed together. An example of the production of such semi-finished products by gluing or sewing is also shown in DE 10 2008 01 1 658 A1. Often, however, a high proportion of manual activities is necessary.
  • a device for the mechanical production of simple one-dimensionally curved preforms with sections of semifinished products, which are held in a cassette and then deposited on a core, is known from DE 10 2008 042 574 A1. More complex shapes can not yet be produced mechanically.
  • Fiber preforms for more complex components Another possibility for producing fiber preforms for more complex components is automated fiber laying.
  • narrow bundles of yarns or bundles of yarn bundles are guided back and forth by a fiber laying head over the molding tool, and deposited, pressed and fixed next to and above one another.
  • a complex robot-like control of the fiber laying head is necessary.
  • the production speed is still relatively slow, as the heads often have to travel long distances and successive narrow fiber bundles are used.
  • they have a very long and complicated yarn tracking from the creel to the multi-axis moving laying head.
  • the object of the invention is to provide an apparatus and a method for the production of Faservorform lingen, so that more complex, high-quality structures can be easily automated, but flexible in the shape and fiber orientation, faster and cheaper to manufacture.
  • the object is achieved by the device with the features according to claim 1. Further advantageous features are mentioned in the dependent claims.
  • the device is characterized in that one or more rewinding devices are provided, with which yarns or rovings which have been dispensed into the area between the yarn transfer points and the first mold can be at least partially withdrawn into the area between yarn transfer points and unwinding stations and / or the unwinding stations can be wound up.
  • one or more rewinding devices are provided, with which yarns or rovings which have been dispensed into the area between the yarn transfer points and the first mold can be at least partially withdrawn into the area between yarn transfer points and unwinding stations and / or the unwinding stations can be wound up.
  • the device is thereby designed so that deposition rates of more than 2 kg / min or even more than 3 kg / min of yarn or roving material can be achieved. Furthermore, both the unwinding stations and the yarn guide can remain stationary by the grippers. Since the usual flat semi-finished products are dispensed with and the fiber preform is draped and produced directly from yarns or rovings, the material costs are much lower than known processes. Due to the parallelization, a short production time can nevertheless be achieved. The flat semi-finished products are quite expensive due to the prefabrication. In the case of strongly three-dimensional components, the use of large-area semi-finished products also entails the risk of wrinkling.
  • the rewind means may be formed, for example, by the yarn dispensers or by the unwind stations, if a direction reversed drive or clutch is provided. But they can also be a separate device. Instead of being rewound onto the bobbins or bobbins, the withdrawn yarn length may also be stored by a corresponding extension of the yarn path, for example, by shifting yarn guide elements until further use.
  • the feeding of the device with yarns or rovings takes place from the unwinding stations.
  • the unwinding stations can be designed, for example, as a so-called creel.
  • the yarns or rovings can be drawn from bobbins or bobbins.
  • Each yarn transfer point receives yarn or rovings from one or more unwind stations.
  • a separating device which can separate the yarns or rovings between a forming tool and the grippers, and / or a separating device which can separate the yarns or rovings between a forming tool and the yarn transfer points.
  • each gripper has its own maximum position and is assigned to its own yarn transfer point, so that the grippers are individually movable on essentially parallel paths. This results in simple yarn paths and rewinding is easily possible. It is advantageous if the grippers can take various individual intermediate positions in their path and if they can hold the respective beginnings of the yarns or rovings at these intermediate positions. This results in the separation of the yarns or rovings between gripper and mold less waste.
  • the device according to the invention is designed so that the individual grippers can each be moved on a substantially linear path from the pickup position to the maximum position. This results particularly simple thread guides with low friction. For more complicated yarn guides, braiding of the yarns can hinder rewinding.
  • the invention can be used particularly advantageously if at least 5 grippers, preferably at least 10 grippers, more preferably at least 20 grippers, are present, in particular if the grippers have a clamping width of 10 to 500 mm, preferably 20 to 200 mm, and / or if all Grippers together have a total clamping width of at least 1 m, preferably of at least 2 m, more preferably of at least 3 m.
  • the first and / or a second forming tool can be brought between the yarn transfer points and at least some of the grippers, in particular so that thereby the yarns or rovings are draped over the forming tool.
  • a control of the yarn tensions of the yarns or rovings may be provided.
  • the yarns are deflected by the forming tool and the yarn tension would change uncontrollably.
  • the yarn tension By controlling the yarn tension during the manufacturing process and in particular during draping can be controlled. This is important, as the yarns or rovings must not be overloaded, but on the other hand should not be too loose in order to achieve optimum structural strengths.
  • the fibers can only be applied largely without tension.
  • the yarn when depositing with a fiber laying head, the yarn must be placed according to the three-dimensionality of the shape with exactly calculated yarn excess length in the form of loops or the like, so that the yarns then during draping, ie when entering or closing the molds, have the stretched length.
  • the yarn tension control is important, even if several grippers when clamping the yarns or rovings at different intermediate positions, in particular close and along an outer contour of a molding tool, stand. Later, this results in little waste of expensive fiber material.
  • the resulting strong deflections of the yarns or rovings can be controlled only with a control of the yarn tensions.
  • a separating device which can separate the yarns or rovings between the first and / or a second forming tool and the grippers, and / or a separating device which can separate the yarns or rovings between the first and / or a second forming tool and the yarn transfer points , intended.
  • a separator for the yarns or rovings is provided between a forming tool and the yarn transfer points, which is adapted to separate the yarns or rovings close to an outer contour of the first and / or a second mold, in particular closer to the mold than at the yarn transfer points.
  • each rewinding device in particular each unwinding station or each group of unwinding stations, is assigned its own coupling and / or braking device, which are preferably designed such that each rewinding device, in particular each unwinding station or each group of unwinding stations, has different lengths withdraw from yarns or rovings. Especially with very strong three-dimensional shapes fall on different issued yarn lengths.
  • one or more sensors are provided which can detect the positions of the beginnings of the yarns or rovings in the area of the yarn transfer points. This can be used to detect when the beginnings are at the desired position for picking up with the gripper and when the rewinding must be stopped.
  • sensors may be camera-based, other optical, electrical or mechanical sensors. It is also conceivable to use a yarn tension measurement as a sensor.
  • one or more spreaders are provided in the area of the yarn transfer points, in particular as a kind of comb with one or more rows of prongs. As a result, the individual yarns or rovings are kept clean in their course both during dispensing and when rewinding.
  • the spreader can also be provided with a clamping or braking device and the spreader can also be movable along the yarn paths or gripper paths. For example, a certain yarn tension for rewinding can be maintained.
  • each unwinding station or each group of unwinding stations at least one device for measuring the respective yarn tensions, which is arranged in the area of the yarn transfer point and / or between the unwinding station and the yarn transfer point and which is preferably designed as a ring force sensor at a deflection point. This ensures that each yarn or roving bundle has controlled yarn tension and can be controlled individually or in small groups.
  • a plurality of unwinding stations preferably a maximum of ten, particularly preferably a maximum of six, can be combined to form a group which has only one yarn tension control.
  • each unwinding station or group of unwinding stations is assigned its own coupling and / or braking device. Furthermore, the yarn tensions for each unwinding station can be controlled individually. As a result, a common drive can be provided at the unwinding stations or the yarn transfer points for the delivery of the yarns. The individual clutch and / or brake devices control then the appropriate yarn tension or separate and connect the drive with yarns.
  • the first and / or a second molding tool can be equipped with a heating device and / or a pressing device.
  • a heating device and / or a pressing device By increasing the temperature or pressure, an existing binder can be activated, so that the yarns or rovings are fixed in the predetermined shape and connected to one another first to a layer and then to the fiber preform.
  • a binder material for example, threads or nonwovens, which consist at least partially of thermoplastic or adhesive, are draped with. As a result, the binder material necessary for fixing is applied directly to the fiber material.
  • the binder material can also be introduced by hybrid threads, which also contain binder material in addition to fiber material, or by coating or spraying the yarns or rovings.
  • the binder material may also be applied, for example sprayed, onto a forming tool after draping the yarns and rovings.
  • a certain stability is achieved for the application of another layer of yarns or rovings or for the further processing of the fiber preform.
  • a pre-activation of the binder material already when dispensing the yarns or rovings should be dispensed with, as this would prevent the rewinding.
  • the method is characterized in that, after the separation, the yarns or rovings which have been dispensed into the area between the yarn transfer points and the first mold are at least partially drawn back into the area between yarn transfer points and unwinding stations and / or at the unwinding stations.
  • the yarns or rovings can be fixed in a dimensionally stable manner after and / or during draping, in particular by activation of binder material, and preferably by heating and / or pressing.
  • the fixing takes place separately and / or after the last layer in each layer.
  • the yarns or rovings can be separated during separation and close to and along an outer contour of the first or a second mold. Furthermore, it is advantageous that the positions of the beginnings of the yarns or rovings in the region of the yarn transfer points are detected with one or more sensors. The retraction of the yarns or rovings is then stopped at a certain signal from the sensor. Preferably, for each unwinding station or for each group of unwinding stations, a separate detection of the beginnings of the yarns or rovings takes place.
  • Draping is the forming or shaping of yarns or rovings with the aid of a molding tool. Draping may be accomplished in one or more stages by moving the molding tool or dies simultaneously or sequentially into the plyed or roving ply.
  • the yarn tensions during draping can be kept essentially constant, preferably at the values which are present at the beginning of draping, and more preferably at the same value. That is to say, the yarn tensions, when the yarns or rovings are stretched, are brought to the desired values, in particular all to the same value, brought and then they are kept constant during draping or reshaping.
  • the yarn tensions are measured in the area of the yarn transfer points and / or between the unwinding stations and the yarn transfer points.
  • the method is carried out several times in succession for depositing a plurality of layers of yarns or rovings on the first mold. This can be done within a device according to the invention or the mold is transported after placing and fixing the one layer and the rewinding of the yarns or rovings in one or more other devices according to the invention, in each of which a further layer of yarns or rovings launched by the inventive method becomes.
  • Fig. 1a side view while gripper yarns or rovings fetches
  • Fig. 1b shows top view while gripper yarns or rovings
  • Fig. 2a side view after tensioning the yarns or rovings
  • Fig. 2b Top view after tensioning the yarns or rovings
  • FIG. 3b shows a plan view after a first draping step of the first layer.
  • Fig. 4b top view after a second Drapier intimid the first layer
  • Fig. 5a side view after the separation of the yarns or rovings
  • Fig. 5b top view after the separation of the yarns or rovings
  • FIGS. 8a-c shows a top view after a second draping step of the second layer and in FIGS. 8a-c a further preferred embodiment of the device according to the invention in various method steps:
  • Fig. 8a top view after application of the first layer
  • Fig. 8c top view after applying yet another layer.
  • the device is suitable for this purpose or the device performs the following method steps successively or partly parallel to one another:
  • fibers such as carbon (carbon), glass, or aramid or other fibers may be used.
  • a matrix material for the fiber-reinforced plastic are, for example, thermoplastic or thermosetting plastic, epoxy resin, other plastic (polymers) or other resin in question.
  • the binder material may be thermoplastic or adhesive.
  • hybrid yarn or hybrid roving It can either already be present as hybrid yarn or hybrid roving, ie individual fibers or yarns are made of binder material, or it can be spanned together with the yarns or rovings from the gripper or it is applied or sprayed onto the draped yarns or rovings.
  • Fig. 1a and 1b the basic structure of the device can be seen.
  • the provision of the yarns or rovings takes place via a multiplicity of unwinding stations, in which the fiber material is provided in the form of bobbins or yarn bobbins (so-called bobbins) and which are arranged in several rows 1, 2 next to one another, one behind the other or one above the other.
  • the coils may also, as shown in Fig. 1a, form an upper and a lower row.
  • the beginnings of the yarns or rovings 20 are shown schematically only in the respectively used area for the unwinding stations 3,4 used. All other beginnings are threaded to the corresponding yarn transfer points 14, so that they can be detected by the associated grippers in the pick-up positions 9.
  • the grippers 5 are shown in their maximum positions 8, which in this case also correspond to the starting positions.
  • the clamping width of a gripper is b and the total clamping width of all grippers is B. Even if only equal width gripper are shown, of course, grippers with different widths are possible.
  • the grippers do not necessarily have their maximum and pickup positions in a line.
  • the second mold is in plan view not shown. And a corresponding movement or lowering device for the second mold is not shown separately.
  • a gripper 6 is in pick-up position and fetches the yarns or rovings corresponding to its arrangement in the device by grasping their beginnings.
  • the gripper is closed by a guide device 7, e.g. a linkage or a piston, movable.
  • the grippers can move individually, but only linearly and on parallel paths next to each other between the pick-up position and the maximum position, thus enabling simple automation and fast parallel movement.
  • several unwinding stations can be combined into one group and assigned to a gripper.
  • a gripper can grab several yarns or rovings together. In any case, at least as many unwinding stations as grippers should be provided.
  • Fig. 2 a and 2 b represent the spanned yarns or rovings 21, which the gripper 10 has pulled out by the method in its intermediate position. This can be assisted by actively powered unwinding.
  • the intermediate position is close to the outer contour of the molds or near the later position of the outer contour when the molds are brought into their draping position.
  • Binder material 18, for example in the form of binder threads or binder webs, can also be stretched by the gripper together with the yarns or rovings. There may also be an upper and a lower row of unwind stations, as shown, so that the binder material is stretched between the upper and lower groups of yarns or rovings.
  • the binder material When pulling out, the binder material can be preactivated in the area of the yarn transfer points 14, in particular by a heating device, so that the yarns or rovings are already somewhat fixed to one another at the beginning of draping.
  • a spreading device can be provided in the area of the yarn transfer points, which can be designed as a kind of comb with one or more rows of tines. This ensures that the yarns or rovings lie next to each other and do not slip laterally during draping.
  • the spreader may also be displaceable along the yarn paths or along the gripper paths. Another possibility for a yarn tension measuring device 13 is shown.
  • Draping is the forming or shaping of yarns or rovings with the aid of a molding tool. Draping may be accomplished in one or more stages by moving the molding tool or dies simultaneously or sequentially into the plyed or roving ply. During draping, it is advantageous to regulate the yarn tensions, in particular to keep them constant. That is, as much yarn or roving is dispensed as is necessary for draping at the corresponding location of the forming tool. To achieve this, brake and clutch devices can be provided. Preferably, each unwinding station or each group of unwinding stations is assigned a corresponding control. This prevents the yarns or rovings from being overloaded or loosely laid. The yarn tensions can also be measured by suitable measuring devices in the area of the yarn transfer points and / or between the unwinding stations and the yarn transfer points. The value of the yarn tensions is preferably between 1 and 50 N / m 2 .
  • Figs. 3 a and 3 b the state after the first draping is shown. From the lift table 17, the first mold 15 'was moved to the draping position. As a result, the yarns or rovings 22 are deflected and draped over the forming tool 15 '. The gripper 10 fixes the beginnings of the yarns near the outer contour of the molding tool 15 '. After this step, binder material or rovings can alternatively or additionally be applied or sprayed onto the yarns or rovings. In the next step, the yarns or rovings are further draped using the second die 16 'that has been moved to its draping position (FIGS. 4 a and 4 b).
  • the molds can also be pressed together and one, preferably the second, or both molds can be heated, so that the binder material is activated and the yarns or rovings are dimensionally stable fixed to a layer. Simultaneously with or after fixing the yarns or rovings are separated on both sides of the molds, ie between gripper and mold and between yarn transfer points and mold.
  • the separator may be connected to the first or second mold. It is advantageous if the separation takes place at least on the side of the yarn transfer points close to the mold. As a result, there is little waste of expensive fiber material and less reworking of the fiber preform is necessary.
  • the separated yarns or rovings 23 can be withdrawn and wound up again by means of a rewinding device or temporarily stored by appropriate yarn guidance.
  • the rewinding takes place in such a way that again starts of the yarns or rovings in the area of the yarn transfer points 14 come to lie so that they can be picked up by the grippers without too much waste material being produced. Sensors can be used to record the beginnings.
  • Fig. 6 a and 6 b show the first and second mold 15, 16 in a rotated position. Here they were turned 90 °. But it is also another angle of rotation, for example, about 30 °, 45 °, 60 °, or a tilt possible. Preferably, the Rotation angle between 10 and 170 °. This depends on how and with which fiber orientation the further layer of yarns or rovings is to be applied.
  • the yarns or rovings of the further layer are stretched to an intermediate position of the grippers and draped by moving the first and second dies 15 ', 16' to the draping position.
  • Figures 7a and 7b show the device after the yarns or rovings have been severed.
  • the use of grippers 1 1 are in an intermediate position. For non-rectangular molds or other angles of rotation, the grippers 1 1 can also stand on various intermediate positions.
  • the further layer of yarns or rovings and possibly of binder material can also be fixed dimensionally stable by heating and / or pressing and connected to the first layer. Together they form the fiber preform ling 28.
  • a further embodiment is shown, as for example in the production of fiber preform lingen for hoods can be used.
  • the used grippers 10.1 are at an intermediate position, the unnecessary grippers 5.1 are in the maximum position 8.1.
  • On the first mold 15.1 a first layer of yarns or rovings is draped and fixed. The second mold is not shown.
  • the stocking of the yarns or rovings takes place in the unwinding stations 1 .1, 2.1.
  • a binder material supply 19.1 and the yarn transfer points 14.1 are present.
  • the application of one or more further layers can take place in the same device or in one or more further devices according to the invention, to which the first molding tool is transferred together with the first layer.
  • Fig. 8b another layer 26.1 is draped onto the rotated forming tool.
  • the used grippers 1 1 .1 are along the outer contour of the mold and make it as accurate as possible. Narrower or different width grippers can be used for even more precise adjustment.
  • Fig. 8 c shows how yet another layer was applied.
  • the used grippers 12.1 are again along the outer contour. After fixing the layers together form the Faservorform ling 28.1.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Robotics (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

L'invention concerne un dispositif et un procédé de fabrication de préformes à fibres (28) constituant notamment une phase préalable dans la fabrication de composants plastiques renforcés par fibres. Le dispositif comporte plusieurs stations de déroulage (3, 4), plusieurs éléments de préhension (5, 5.1) et au moins un premier outil de moulage (15), chaque élément de préhension (5, 5.1) pouvant être déplacé en va-et-vient sur une trajectoire entre une position maximale (8, 8.1) et une position de retrait (9, 9.1), la position de retrait (9, 9.1) étant prévue dans une zone de transfert de filés (14, 14.1) et se trouvant plus proche de la station de déroulage (3, 4) que la position maximale (8, 8.1). Le dispositif comporte un ou plusieurs systèmes de rembobinage permettant de ramener au moins partiellement, dans la zone située entre les zones de transfert de filés (14, 14.1) et les stations de déroulage (3, 4), ou d'enrouler sur les stations de déroulage (3, 4), les filés ou stratifils distribués dans la zone située entre les zones de transfert de filés (14, 14.1) et le premier outil de moulage (15).
PCT/EP2012/051287 2011-04-08 2012-01-27 Dispositif et procédé de fabrication de préformes à fibres constituant notamment une phase préalable dans la fabrication de composants plastiques renforcés par fibres Ceased WO2012136391A1 (fr)

Applications Claiming Priority (2)

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DE102011007022A DE102011007022A1 (de) 2011-04-08 2011-04-08 Vorrichtung und Verfahren zur Herstellung von Faservorformlingen, die insbesondere eine Vorstufe bei der Herstellung von faserverstärkten Kunststoff-Bauteilen darstellen
DE102011007022.2 2011-04-08

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WO2012136391A1 true WO2012136391A1 (fr) 2012-10-11

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9409356B2 (en) 2010-04-16 2016-08-09 Compositence Gmbh Method for manufacturing fibre layers
US9718233B2 (en) 2011-05-05 2017-08-01 Compositence Gmbh Method and apparatus for producing laid fibre fabrics and component preforms made of fibres
US9782926B2 (en) 2012-04-13 2017-10-10 Compositence Gmbh Laying head and apparatus and method for manufacturing a three-dimensional pre-form for a structural component from a fiber composite material
US10137647B2 (en) 2012-12-28 2018-11-27 Compositence Gmbh Method and device for manufacturing three-dimensional fiber fabrics and component preforms made of fibres in two steps
DE102018119368A1 (de) * 2018-08-09 2020-02-13 Audi Ag Vorrichtung und Verfahren zur Herstellung von Faserstacks

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021111900A1 (de) 2021-05-06 2022-11-10 Technische Universität Chemnitz, Körperschaft des öffentlichen Rechts Legevorrichtung und Legeverfahren für bandförmiges Material

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040011843A1 (en) * 2002-07-16 2004-01-22 Priest James R. High-speed fiber feed assembly
US20080202691A1 (en) 2007-02-28 2008-08-28 Alexander Hamlyn Device for using fibers with flexible fiber-routing tubes
US20080295954A1 (en) * 2007-05-31 2008-12-04 Kisch Robert A End effector and methods for constructing composite members
DE102008011658A1 (de) 2008-02-28 2009-09-03 Daimler Ag Verfahren zum Herstellen eines Faserverbund-Bauteils und Faserverbund-Bauteil
DE102008042574A1 (de) 2008-10-02 2010-04-08 Airbus Deutschland Gmbh Vorrichtung zum Ablegen und Drapieren von Abschnitten einer Verstärkungsfaserstruktur zur Herstellung eines Profilvorformlings sowie Verfahren
US20110000608A1 (en) * 2007-12-19 2011-01-06 Vestas Wind Systems A/S Apparatus for preparing a pre-form

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040011843A1 (en) * 2002-07-16 2004-01-22 Priest James R. High-speed fiber feed assembly
US20080202691A1 (en) 2007-02-28 2008-08-28 Alexander Hamlyn Device for using fibers with flexible fiber-routing tubes
US20080295954A1 (en) * 2007-05-31 2008-12-04 Kisch Robert A End effector and methods for constructing composite members
US20110000608A1 (en) * 2007-12-19 2011-01-06 Vestas Wind Systems A/S Apparatus for preparing a pre-form
DE102008011658A1 (de) 2008-02-28 2009-09-03 Daimler Ag Verfahren zum Herstellen eines Faserverbund-Bauteils und Faserverbund-Bauteil
DE102008042574A1 (de) 2008-10-02 2010-04-08 Airbus Deutschland Gmbh Vorrichtung zum Ablegen und Drapieren von Abschnitten einer Verstärkungsfaserstruktur zur Herstellung eines Profilvorformlings sowie Verfahren

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9409356B2 (en) 2010-04-16 2016-08-09 Compositence Gmbh Method for manufacturing fibre layers
US9718233B2 (en) 2011-05-05 2017-08-01 Compositence Gmbh Method and apparatus for producing laid fibre fabrics and component preforms made of fibres
US9782926B2 (en) 2012-04-13 2017-10-10 Compositence Gmbh Laying head and apparatus and method for manufacturing a three-dimensional pre-form for a structural component from a fiber composite material
US10137647B2 (en) 2012-12-28 2018-11-27 Compositence Gmbh Method and device for manufacturing three-dimensional fiber fabrics and component preforms made of fibres in two steps
DE102018119368A1 (de) * 2018-08-09 2020-02-13 Audi Ag Vorrichtung und Verfahren zur Herstellung von Faserstacks

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