EP2903803A1 - Procédé de fabrication de préformes fibreuses qui représentent en particulier une étape préalable lors de la fabrication d'éléments en plastique renforcés par des fibres - Google Patents

Procédé de fabrication de préformes fibreuses qui représentent en particulier une étape préalable lors de la fabrication d'éléments en plastique renforcés par des fibres

Info

Publication number
EP2903803A1
EP2903803A1 EP13765982.7A EP13765982A EP2903803A1 EP 2903803 A1 EP2903803 A1 EP 2903803A1 EP 13765982 A EP13765982 A EP 13765982A EP 2903803 A1 EP2903803 A1 EP 2903803A1
Authority
EP
European Patent Office
Prior art keywords
rovings
positioning element
gripper
grippers
yarns
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Withdrawn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
EP13765982.7A
Other languages
German (de)
English (en)
Inventor
Marco Göttinger
Sebastian Gierl
Michael Kaiser
Yannis GROHMANN
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.)
Audi AG
Voith Patent GmbH
Original Assignee
Audi AG
Voith Patent 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 Audi AG, Voith Patent GmbH filed Critical Audi AG
Publication of EP2903803A1 publication Critical patent/EP2903803A1/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Withdrawn legal-status Critical Current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
    • 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]
    • B29C70/384—Fiber placement heads, e.g. component parts, details or accessories
    • 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
    • B29C70/386—Automated tape laying [ATL]
    • B29C70/388—Tape placement heads, e.g. component parts, details or accessories
    • 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
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/0027—Cutting off
    • 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
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/0081—Shaping techniques involving a cutting or machining operation before shaping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
    • B29K2105/0854—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns in the form of a non-woven mat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
    • B29K2105/0872—Prepregs
    • B29K2105/0881—Prepregs unidirectional
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/25—Solid
    • B29K2105/253—Preform

Definitions

  • Apparatus for the production of fiber preforms which in particular constitute a precursor in the production of fiber-reinforced plastic components
  • 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 or ribbons and a plurality of grippers, each one or more yarns or rovings or bands at its beginning, each gripper being reciprocally movable on a path between a maximum position and a pick-up position, and wherein the pick-up position is provided at a yarn transfer point and closer to the unwind station than the maximum position the grippers are each movable individually on substantially parallel paths, so that the yarns or rovings or bands can be clamped in parallel.
  • Fiber-reinforced plastic consists of matrix material and of fibers that are embedded in the matrix material and that provide, among other things, the tensile strength. Fiber-reinforced plastic is used especially for high in astetete components that 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 accurately the fiber layer is adapted to the load and the more uniformly the fibers are arranged, the better the component will be. For components made of fiber-reinforced plastic, there are numerous manufacturing processes.
  • Both for the production of the fiber preforms and for the impregnation and / or hardening or consolidation of the components molding tools can be used according to the desired component shape, or placed and pressed into the fiber preform or the component.
  • 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.
  • Many yarns untwisted simultaneously from a spool or from a ball are called yarn bundles or rovings.
  • the rovings can consist of up to several ten thousand single yarns, which are also called filaments.
  • a high proportion of manual activities is necessary.
  • More complex shapes can not yet be produced by machine and in large numbers.
  • Another possibility for producing fiber preforms for more complex components is automated fiber laying. In this case, 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.
  • the still unpublished application DE 10 2011 007018 of the applicant describes a device for the automatable production of fiber preforms with a plurality of parallel movable grippers for clamping and depositing fibers in a layer on a molding tool.
  • the grippers are in this case on a guide device, e.g. attached to a pole, so that they can be freely cantilevered.
  • a large travel is necessary for the production of larger components. This leads either to a certain inaccuracy due to deflection and vibrations of the guide device or the guide device must be made correspondingly solid, which limits the traversing speed and thus the operating speed due to the weight or because of the inertia.
  • the object of the invention is to develop a corresponding device so that a higher accuracy in the manufacture of the fiber preforms is achieved and at the same time a great flexibility and high operating speed is possible.
  • the object is achieved by a device with the features of claim 1.
  • a first positioning element is fastened to each gripper and at least one corresponding second positioning element is provided for each first positioning element, wherein the position of the gripper can be fixed by interengaging the first and the second positioning element at a location along the path.
  • the grippers are moved along the path by the guide device, which may be designed, for example, as a rod or carrier.
  • the grippers are precisely positioned at one position, so that the position of the gripper can be precisely predetermined without the need for complex control or programming or a highly precise and very rigid guide device.
  • the positioning elements can each have a stop surface.
  • the stop surface can serve both as a stop in the direction of the path, as well as in one or both spatial directions perpendicular to the path.
  • the stop surface may for this purpose have a plurality of, for example stepped or angled or also conical abutment surfaces.
  • the second positioning element can also be designed to be displaceable along the path of the gripper in order to be able to set different stop positions. By more precise fine adjustment, it may be sufficient if the grippers are positioned only slightly inaccurate by the guide device.
  • the guide device can therefore be made lighter and easier.
  • the guide device is connected to a drive in order to be able to move the gripper along its path. If necessary, stronger and therefore heavier grippers can be used without tolerance problems. Overall, the leadership of the gripper can be performed with more tolerance, which saves costs.
  • the exact positioning of the yarns or rovings or ribbons in the gripper can be made more accurate.
  • the arrangement of the spanned yarns or rovings or bands or their location when depositing can be done more accurately. This makes it possible, very quickly and with little fiber material to produce high-strength and very load-adapted shaped fiber preforms.
  • a further advantage results if, for each first positioning element, a further, third positioning element is present, wherein the position of the gripper can be fixed by interengaging the first and the third positioning element at a further point along the path.
  • the position of the grippers can be set more precisely at least at two points, for example when picking up the yarns or rovings or ribbons at the yarn transfer point and at a forming tool for depositing the yarns or rovings or ribbons.
  • the position can be determined particularly accurately if the position of the respective gripper in a spatial direction perpendicular to the path, preferably in both directions perpendicular to the path, can be determined in each case by the intermeshing of the first and the second or third positioning element.
  • the gripper and thus the spanned yarn is positioned more precisely not only along the path but also transversely thereto.
  • each first positioning element has at least one elevation, in particular a conical or centering elevation, and that every second and / or third positioning element has a recess which fits in accordance with the elevation.
  • the positioning elements engage with each other so that when moving together a centering on the desired position.
  • each second and / or third positioning element has at least one elevation, in particular a conical or centering elevation, and that each first positioning element has at least one recess corresponding to the elevation.
  • Positioning elements which each have a plurality of elevations or a plurality of depressions are also suitable for the embodiment according to the invention.
  • both the first positioning element and the second and / or third positioning element can each have an elevation and a depression, which mutually engage one another when moving together.
  • Angular or cylindrical pins preferably with chamfering at the top, and matching holes or guide rails with corresponding counterparts.
  • the respective depression can also have a chamfer in order to ensure secure engagement, even if the gripper is not quite exactly approached.
  • each one spatial direction and one for the other spatial direction can also be present for the positioning with respect to the two spatial directions transverse to the path two separate elevations and depressions on the respective positioning elements.
  • One for one spatial direction and one for the other spatial direction For example, each one wedge-shaped rib and a matching notch each transverse to the corresponding spatial direction.
  • the yarn transfer point is preferably located at the maximum position, as at the maximum extended guide device, it is particularly advantageous if the respective second or third positioning element are provided at the yarn transfer point. This increases the accuracy of clamping the yarns or rovings or ribbons in the pick-up position of the gripper.
  • the invention can also be used for the devices described below.
  • the spun yarns or rovings or ribbons may be laid down on a table or via a forming tool placed under the stretched yarns or rovings or ribbons. On the table or over the mold creates a position.
  • one or more separators are provided which can separate the yarns or rovings or ribbons in the area of the yarn transfer points. After separation, another layer can be placed, for example, at a different angle.
  • the yarns or rovings or ribbons are preferably made of carbon, glass or aramid fibers.
  • the yarns or rovings can be splayed on the way between the unwinding station and the yarn transfer point, so that they are neatly clamped next to each other. This can be done for example by multiple deflection around rollers or rods.
  • the fibers or rovings or ribbons may already contain binder material or binder material may be applied between the unwinding station and the yarn transfer point or near the pick-up position.
  • the binder material can also be applied only to the unfolded or deposited layer. For example by spraying.
  • the matrix material may also already be applied, which is then consolidated or cured after forming.
  • the fiber preform already contains matrix material in not yet cured or not yet fully consolidated form.
  • the several 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 device for Control or adjustment and / or means for measuring the yarn tension may be present.
  • the clamping width of the grippers is preferably 10 to 500 mm, particularly preferably 30 to 100 mm.
  • the grippers may also have different widths to map corresponding contours without undue effort.
  • at least 5 grippers, preferably at least 10 grippers, more preferably at least 20 to a maximum of 40 grippers are present.
  • more complex contours can be displayed well. With more than 40 grippers, however, the expenditure on equipment becomes too great.
  • the device according to the invention may preferably have a table, which is rotatable about an axis substantially perpendicular to the paths and which can be raised and lowered substantially perpendicular to the paths.
  • a table which is rotatable about an axis substantially perpendicular to the paths and which can be raised and lowered substantially perpendicular to the paths.
  • By lifting the table can be brought, for example, in the plane of the spanned yarns so that they can be better placed on it.
  • Turning the table allows you to place several layers at different fiber angles for a load-oriented production of the fiber preform, for example below +/- 30 ", +/- 45 °, +/- 60", +/- 90 " preferably rotatable by +/- 30 "to +/- 90".
  • a first molding tool can be provided, which can be brought between the pick-up position and the maximum position of at least some grippers, in particular so that the spanned yarns or rovings or ribbons are thereby draped over the first molding tool .
  • the first mold may for example be mounted on the table and raised above this and lowered and rotated.
  • each gripper different length of yarn can be pulled out with constant yarn tension.
  • the invention offers great advantages without excessive effort, especially since no complicated regulation is necessary.
  • the constant yarn tension can reduce warping of the structure of the fiber preform.
  • the first forming tool there may be one or more further forming tools which can be moved together with the first forming tool so as to reshape the spanned yarns or rovings or ribbons in a 3-dimensional manner.
  • the further mold may be formed as a hood, which forms a counter-mold to the first mold and presses the fiber layer to this.
  • the further shaping tools can also be designed as a plurality of punches or partial hoods, which press the fiber layer only at specific locations on the first molding tool, for example in concave areas or at edge transitions of the mold.
  • the other molds can also be made to be movable in different directions and inclined relative to the vertical in order to be able to press the fiber layers of the desired shape correspondingly to the first mold.
  • the invention can be used particularly advantageous.
  • the first and / or one or more further molding tools can be heated.
  • the first and / or one or more further molding tools can also be cooled in order to re-solidify already preheated binder material during shaping.
  • a heating device in particular an IR radiator device or a heated plate, may be provided, which are the fibers or rovings or bands during or after clamping heated.
  • binder material can be activated or the clamped layer can be made more deformable.
  • each gripper can be assigned at least one yarn storage device which is provided between unwinding station and yarn transfer point.
  • the yarn storage device has at least two fixedly mounted deflection elements and at least one translational, in particular substantially vertically displaceably mounted tensioning roller between a first and a second end position, wherein the deflecting elements and the tensioning roller are looped by the yarns or rovings or belts so that the tensioning roller is arranged in the yarn path between the deflecting elements.
  • translationally freely displaceable it is understood that the tensioning roller is displaceable in a substantially rectilinear manner. For example, in a rail or a guide and without that a drive is provided. A damping or a certain friction or a certain holding force may nevertheless be present.
  • translational should also be understood even a slight curvature of the displacement.
  • the tension roller has a first and a second end position, between which it is displaceable.
  • the first end position is closer to the two deflecting elements than the second end position.
  • the displacement is triggered by a short-term small change in the yarn tension, which acts against the weight of the tension roller or against a holding force, for example by a spring. Due to the displacement from the first end position in the direction of the second end position, the Garnlaufweg is extended between the two deflecting elements, so that run length is cached.
  • the speed of the yarns or rovings or ribbons during this displacement at the outlet is smaller than at the inlet to the yarn storage device. In a shift from the second towards the first end position of the Garnlaufweg between the two deflection elements is shortened, the stored run length is reduced. During this shift, the speed at the outlet is greater than at the inlet.
  • the decoupling of the speed can be used so that withdrawn by the gripper during clamping to beyond the mold addition pulled yarn and thus the yarn tension is kept constant, while the gripper is moved back towards the first mold until the first positioning with the on Mold or table-mounted positioning is engaged.
  • the yarn storage device reacts without extra regulation on the externally given speeds or yarn tensions and thus compensates for temporary differences.
  • the fixedly mounted deflection elements are, for example, rotatably mounted rollers or deflection rods.
  • FIG.1 - 4 preferred embodiment of a device according to the invention
  • FIG. 6 shows a section of a device during clamping (top view)
  • FIG. 7 shows a detail of a device when approaching the gripper to the first mold (top view).
  • the figures are described in more detail below.
  • the devices according to the invention shown in the figures are described for the processing of rovings. But they can be used in the same way for yarns or ribbons.
  • the devices are suitable for carrying out the following method steps successively or partly parallel to each other:
  • the fiber material for the yarns or rovings fibers such as carbon (carbon), glass, or aramid or other fibers may be used.
  • thermoplastic or thermosetting plastic comes into question.
  • the binder material may be thermoplastic, thermoset or adhesive. 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 rovings from the gripper or it is applied or sprayed onto the draped rovings.
  • FIGS. 1-4 show a preferred device according to the invention.
  • Fig. 1 and 2 the picking up of the rovings using the gripper is shown. Once in side view and once in plan view.
  • the basic structure of the device is also recognizable.
  • the provision of the yarns or rovings takes place via a multiplicity of unwinding stations 1, 2, 3, 4, in which the fiber material is provided in the form of bobbins or bundles of yarn (so-called bobbins) and which are arranged next to one another, behind one another or one above the other in several rows 1, 2 are arranged.
  • the beginnings of the yarns or rovings 20 are shown schematically only in the respectively used area for the unwinding stations 3,4 used.
  • the grippers 6 are shown in their maximum positions 12.
  • the clamping width of a gripper is preferably slightly wider than the actual width of the rovings clamped by a gripper. Even if only equal width gripper are shown, of course, grippers with different widths are possible.
  • the grippers do not necessarily have to have their maximum and pickup positions in line.
  • the grippers are each coupled to a guide device 10.
  • the guide device may be, for example, a rod or a carrier.
  • the guide devices are connected to a drive system. In the apparatus shown are the Grippers parallel to each other, moved on linear, horizontal paths. They can also be moved individually to different positions.
  • the grippers 8 are in pick-up position and pick up the rovings at the yarn transfer point assigned to them by gripping their beginnings 20.
  • a first positioning element on the gripper 8 and a second positioning element on the yarn transfer point 14 are present, which are in the pick-up position in the engagement 26.
  • a gripper 8 can grab several rovings together. In any case, at least as many unwinding stations 3, 4 as gripper 8 should be provided.
  • Each gripper 8 is assigned a yarn transfer point 14.
  • there may be a binder material supply which may for example be arranged between the rows of unwinding stations. The binder material can also be applied between the unwinding station and the yarn transfer point or on the mounted rovings.
  • a yarn storage device 13 is arranged between Abwickelstation 3,4 and yarn transfer point 14.
  • a separate yarn storage device 13 is provided, which can react depending on the respective take-off speed.
  • the rovings are guided over two deflecting elements 9 and a tensioning roller 5 mounted between them and mounted in a translationally freely displaceable manner.
  • the tension roller 5 is substantially vertically displaceable between a first end position 5a and a second end position 5b. This shortens or lengthens the Garnlaufweg.
  • the displacement can be realized, for example, in rails or other guides. If, during clamping, more roving length at the yarn transfer point 14 is temporarily removed from the gripper 8 than is subsequently required during forming, then the tension roller 5 is raised. The memory empties. Is the clamping completed and will later the gripper to the mold moved up, so the tension roller 5 moves down. The rovings are withdrawn. The memory is refilled.
  • the withdrawal speed at the yarn transfer point 14 can be decoupled from the conveying speed at the inlet briefly, which not only allows rewinding but also high clock rates with rapid changes in the take-off speed, without the conveying speed at the unwinding 3.4 must be changed , As a result, for example, a high distribution quality in width is still guaran teed.
  • a yarn preparation unit (not shown here), such as a spreader or a binder application unit, between the unwinding station 3, 4 and the yarn storage device 13. Both the spreading and the binder application require the most uniform possible yarn speed.
  • a first mold 18 is shown on a lift table 17, wherein the mold 18 can be rotated on or with the lift table 17.
  • Another mold 16 which is designed as a hood is shown in the down position so outside the paths of the gripper.
  • the further mold 16 is not shown in plan view. And a corresponding movement or lowering device for the further mold 16 is not shown separately.
  • the further mold can also be constructed in several parts, for example, of several stamps.
  • On the first mold 18, an already deposited layer 23 of rovings is shown.
  • FIG. 3 shows the device in plan view when mounting the rovings 21st
  • the grippers are in an intermediate position 15, wherein the first positioning elements on the grippers 15 are now in engagement with the third positioning elements on the first forming tool 27.
  • the grippers can also be moved to different intermediate positions, so that a close-contour clamping with little waste of expensive fiber material is possible.
  • the grippers 15 span a layer of rovings simultaneously. By the Positioning elements, the position of the rovings is precisely determined so that a precise alignment and thus a high quality is achieved in the fiber preform.
  • a heating device e.g. one or more IR emitters, be provided to heat any applied binder material or existing matrix material and thus to activate.
  • the lifting table 17 has moved upwards, so that the rovings 22 are draped over the first forming tool 18.
  • the further forming tool 16 has moved together with the first forming tool 18, so that the rovings 22 are correspondingly shaped.
  • the grippers 15 are held exactly in the desired position without complex control or sensors on the engagement 27 of the positioning.
  • the device according to the invention allows rapid closing and forming.
  • the first mold 18 and / or the further mold 16 may be heated to heat binder material or already existing matrix material.
  • the first mold 18 and / or the further mold 16 may also be cooled in order to cool already heated binder material and thus to fix the mold.
  • FIG 5 an exemplary embodiment for the positioning elements is shown in side view.
  • the first positioning element 24 is connected to the respective gripper 15 '. About a guide device 10 ', the gripper can be moved along its path.
  • a second or third positioning element 25 is present on the first mold 18 '.
  • the first positioning element 24 has an elevation 28 which fits into the corresponding recess 29 on the second or third positioning element 25, whereby Approaching the gripper 15 'to the first mold 18' an exact mechanical fine adjustment of the position of the gripper 15 'relative to the first mold 18' takes place.
  • the elevation 28 is designed, for example, as a wedge strip and the depression 29 as a notch, an exact positioning in the direction of the path and perpendicular thereto in the vertical position is provided.
  • the gripper 15 is aligned even in the second spatial direction transverse to the path, ie in the transverse direction (into the plane of the page).
  • the survey may also be designed as a pin, centering pin, guide rail or guide piece.
  • the recess must be designed appropriately. Both elevation and indentation may have chamfers to facilitate the procedure of approaching. 6 and 7 show a detail of another device according to the invention. The spanned yarns or rovings or ribbons are not shown for clarity.
  • the grippers 7 are moved over the guide devices 10 'to span the gripped rovings over the first forming tool 18 ", and when the first forming tool 18" is then brought up between grippers 7 and yarn transfer points, the grippers will engage Meanwhile, the yarn storage devices provide for rewinding of the rovings and for constant yarn tension On the mold, the grippers 15 "are accurately aligned in position by the engagement 27 'of the positioning elements. By changing the mold can be quickly converted to the production of a fiber preform for another component. The new position of the grippers is determined mechanically by the positioning elements on the molding tool, without having to change over any control or regulation. LIST OF REFERENCE NUMBERS

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

Abstract

L'invention concerne un dispositif de fabrication de préformes fibreuses qui représentent en particulier une étape préalable lors de la fabrication d'éléments en plastique renforcés par des fibres. Le dispositif comprend plusieurs postes de dévidage (1, 2, 3, 4) pour la préparation de plusieurs fils ou stratifils ou bandes et plusieurs pinces (6, 7, 8, 15, 15', 15'') qui peuvent saisir chacune des fils ou stratifils ou bandes individuels ou plusieurs fils ou stratifils ou bandes à leur début (20). Chaque pince (6, 8, 15) peut être déplacée selon un mouvement de va-et-vient sur une trajectoire entre une position maximale (12) et une position de retrait (11), cette dernière (11) étant prévue à un endroit de transfert de fil (14) et plus près du poste de dévidage (1, 2, 3, 4) que la position maximale (12). Les pinces (6, 7, 8, 15, 15', 15'') peuvent être déplacées chacune sur des chemins individuels pratiquement parallèles entre eux. Les fils ou stratifils ou bandes peuvent être tendus en parallèle. Un premier élément de positionnement (24) est fixé sur chaque pince (6, 7, 8, 15, 15', 15'') et au moins un deuxième élément de positionnement (25) correspondant est présent en plus du premier élément de positionnement. La position de la pince (6, 7, 8, 15, 15', 15'') peut être déterminée par l'entrée en prise du premier et du deuxième élément de positionnement à un endroit le long du chemin.
EP13765982.7A 2012-10-05 2013-09-17 Procédé de fabrication de préformes fibreuses qui représentent en particulier une étape préalable lors de la fabrication d'éléments en plastique renforcés par des fibres Withdrawn EP2903803A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012218186.5A DE102012218186A1 (de) 2012-10-05 2012-10-05 Vorrichtung zur Herstellung von Faservorformlingen, die insbesondere eine Vorstufe bei der Herstellung von faserverstärkten Kunststoffbauteilen darstellen
PCT/EP2013/069208 WO2014053305A1 (fr) 2012-10-05 2013-09-17 Procédé de fabrication de préformes fibreuses qui représentent en particulier une étape préalable lors de la fabrication d'éléments en plastique renforcés par des fibres

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EP2903803A1 true EP2903803A1 (fr) 2015-08-12

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EP13765982.7A Withdrawn EP2903803A1 (fr) 2012-10-05 2013-09-17 Procédé de fabrication de préformes fibreuses qui représentent en particulier une étape préalable lors de la fabrication d'éléments en plastique renforcés par des fibres

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EP (1) EP2903803A1 (fr)
DE (1) DE102012218186A1 (fr)
WO (1) WO2014053305A1 (fr)

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DE102014018933A1 (de) 2014-12-22 2016-06-23 Airbus Defence and Space GmbH Vorrichtung zur Konsolidierung einer Preform
DE102016117799A1 (de) 2016-09-21 2018-03-22 Airbus Operations Gmbh System und verfahren zur herstellung eines faserverbundhalbzeugs sowie ein verfahren zur herstellung eines faserverbundbauteils
US10773469B2 (en) 2017-02-21 2020-09-15 Seriforge Inc. Systems and methods of converting fiber into shaped fabric plies for composite preforms and products

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US4318762A (en) * 1980-04-21 1982-03-09 Victor United, Inc. Method and apparatus for sequentially forming a molded product
JPS60230808A (ja) * 1984-05-01 1985-11-16 Toyota Motor Corp 表皮材の型内供給方法
US20080289743A1 (en) * 2003-05-02 2008-11-27 Tsotsis Thomas K Highly porous interlayers to toughen liquid-molded fabric-based composites
DE102005008705B3 (de) * 2005-02-25 2006-09-21 Karl Mayer Malimo Textilmaschinenfabrik Gmbh Vorrichtung zum Zuführen von Faserbändern zu einer Wirkmaschine
JP4977884B2 (ja) * 2006-05-24 2012-07-18 福井県 シート製造装置及びその方法
FR2912953B1 (fr) 2007-02-28 2009-04-17 Coriolis Composites Sa Machine d'application de fibres avec tubes flexibles d'acheminement de fibres
GB2487050A (en) * 2011-01-04 2012-07-11 Vestas Wind Sys As Automated techniques for manufacturing fibrous panels
DE102011007020A1 (de) * 2011-04-08 2012-10-11 Voith Patent Gmbh Vorrichtung und Verfahren zur Herstellung von Faserformlingen, die insbesondere eine Vorstufe bei der Herstellung von faserverstärkten Kunststoff-Bauteilen darstellen
DE102011007018A1 (de) 2011-04-08 2012-10-11 Voith Patent Gmbh Vorrichtung und Verfahren zur Herstellung von Faservorformlingen, die insbesondere eine Vorstufe bei der Herstellung von faserverstärkten Kunststoff-Bauteilen darstellen

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DE102012218186A1 (de) 2014-04-10

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