WO2012031723A1 - Method and device for producing a semifinished fiber product - Google Patents

Method and device for producing a semifinished fiber product Download PDF

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Publication number
WO2012031723A1
WO2012031723A1 PCT/EP2011/004443 EP2011004443W WO2012031723A1 WO 2012031723 A1 WO2012031723 A1 WO 2012031723A1 EP 2011004443 W EP2011004443 W EP 2011004443W WO 2012031723 A1 WO2012031723 A1 WO 2012031723A1
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WO
WIPO (PCT)
Prior art keywords
laying
fiber
fibers
fiber bundles
strips
Prior art date
Application number
PCT/EP2011/004443
Other languages
German (de)
French (fr)
Inventor
Thomas Stahs
Original Assignee
Daimler Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to DE102010044721.8 priority Critical
Priority to DE201010044721 priority patent/DE102010044721A1/en
Application filed by Daimler Ag filed Critical Daimler Ag
Publication of WO2012031723A1 publication Critical patent/WO2012031723A1/en

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Classifications

    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/02Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
    • D04H3/04Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments in rectilinear paths, e.g. crossing at right angles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28Shaping operations therefor
    • B29C70/30Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • B29C70/38Automated lay-up, e.g. using robots, laying filaments according to predetermined patterns
    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/002Inorganic yarns or filaments

Abstract

The invention relates to a method for producing a semifinished fiber product (10), in particular for a fiber reinforced plastic, having at least one nonwoven (12) comprising a multiplicity of fibers or fiber bundles (30) running unidirectionally, comprising the following steps: subdividing a nonwoven model (16) of the corresponding at least one nonwoven (12) into one or a plurality of model strip(s) (18) running in the fiber direction and lying beside one another which, in turn, each comprise a plurality of model fibers or model fiber bundles (30) running unidirectionally; producing a laying program (26) for a laying installation (28) by using the model strips (18) having the respective plurality of model fibers or model fiber bundles (30) thereof that run unidirectionally; laying down the fibers or fiber bundles (30) of the respectively associated strips (32) of the corresponding nonwoven (12) by means of the laying installation (28) by using the laying program (26).

Description

 Method and device for producing a semi-finished fiber product

The invention relates to a method and an apparatus for producing a

Semifinished fiber.

Such semifinished fiber products are customarily cut in the desired shape today from comparatively expensive endless goods, which are designed, for example, as fabric or scrim. This creates a very costly waste. Compared with the endkonturtreues laying down the fibers or fiber bundles today usually done by sewing together or simultaneously storing and fixing the fibers, for example by robot-guided laying heads with a heated roller. However, such processes are extremely slow.

For example, EP 2 138 615 A1 discloses a method as known, which is used to produce a multiaxial yarn layer. This method also has the disadvantage that this results in considerable waste.

It is therefore an object of the present invention to provide a method and a device by means of which semifinished fiber products with a small amount of waste can be realized with simultaneously high laying speed. In addition, semi-finished fiber products of different geometries can be produced extremely reliably and cost-efficiently.

This object is achieved by a method and an apparatus having the features of claims 1 and 8, respectively. advantageous

Embodiments with expedient and non-trivial developments of the invention are specified in the dependent claims. In order to provide a method of the type mentioned above, by means of which a semifinished fiber can be produced particularly quickly and without significant waste in a variety of components process-reliable, at least the following steps are provided according to the invention: First, a Gelegemodell the corresponding at least one Geleges the semifinished fiber in one or more of in

Fiber direction extending adjacent model strips divided, which in turn a plurality of unidirectionally extending model fibers or

Model fiber bundles include. Thus, first of all, the respective scrim is decomposed as a model into a plurality of strips of preferably the same width. Each of these

Model strip preferably contains an equal number of parallel model fibers or model fiber bundles (rovings).

In a further method step, a laying program is then produced on the basis of the plurality of model strips, which are formed from the respective plurality of unidirectionally extending model fibers or model fiber bundles. This laying program is preferably formed by stacking the individual model strips to form a sequence, which can then be passed on to the laying system. On the basis of this laying program can then take place the laying of the fibers or fiber bundles of the respective associated strip of the corresponding Geleges. When depositing a cut to length of the respective fibers or fiber bundles is made. Preferably, the laying system leads the bundles of fibers (rovings) parallel to the desired width of the strips, the individual fiber bundles being placed thereon for example on a suitable carrier material, fixed there and cut off in accordance with the underlying laying program. This can be achieved in a particularly favorable manner that the waste for each clutch

or semi-finished fiber keeps in an extremely narrow frame.

Overall, therefore, a method is provided in which by the modeled division of the respective Geleges into individual strips with associated fibers or fiber bundles, which then form the basis of the generation of a laying program on the basis of which then deposits a corresponding laying system, the fibers or fiber bundles, a particular efficient and

cost-effective production of semi-finished fiber is created. This results in very little waste and, moreover, it is possible with this method to use the laying system for a variety of different scrim or semi-finished fiber efficiently. Thus, a fast and large-scale production of semi-finished fiber products for the production of fiber reinforced plastics as a result of Parallelization of the fiber tray in conjunction with a high, unidirectional

Feed rate possible. Another advantage of the present method is the fact that the production of semi-finished fiber products is essentially independent of the plant technology of the laying system, but that an adaptation in

excellent way by a program change of the laying program can be done. The laying system is characterized by the fact that cost-effective

Plant technology can be used without component-specific special machine construction. In addition, there is a small space requirement for the laying system. Another advantage is that a small space requirement through the complete

Plant technology is required and a full automation in the production can be realized. Another advantage is that in a much better way

Semi-finished fiber can be created from one or more occasions, which are made extremely load path justice. In addition, not only two-dimensional, but also three-dimensional semi-finished products can be created with the present technology.

In a further embodiment of the invention, it has been found to be advantageous if a carrier material is used, which is separated after depositing the Geleges and transported to another station of the laying plant. This results in a particularly fast production process of the individual clutches, wherein the transport can be used in addition to the heat input into the scrim.

A further advantageous embodiment provides that the plurality of layers are joined together to form a total layer, with only partial regions of the layers being connected to one another. Thus, for example, if a heat input takes place only at desired locations and thus the individual scrims are interconnected only in partial areas, this has the advantage that more complex geometries of the semifinished fiber can be created in a simple manner. For example, it is thus possible to create creases that are to remain flexible and flexible for the subsequent processes such as draping.

A further advantageous embodiment provides that the plurality of layers are connected to one another in different orientations of the respective fiber bundles to form the overall layer. Thus, a very stressful

Semi-finished fiber products are created. In a further embodiment of the invention, the Gesamtgegege is finally trimmed after its production in a final contour. Thus, in a simple manner when placing the individual fiber bundles a near net shape of the respective Geleges be created, in which case after creation of the final semi-finished fiber easily trimming can be done without causing excessive waste.

The advantages mentioned above in connection with the method according to the invention apply in the same way to the device according to claim 8. This is characterized in particular by its laying system, which is based on the

Laying program is controllable, which has been previously calculated on the basis of a corresponding model with the plurality of model strips, which in turn are each formed from a plurality of model fibers or model fiber bundles.

Further advantages, features and details of the invention will become apparent from the following description of a preferred embodiment and from the drawings; these show in:

Fig. 1 is a schematic plan view of four individual layers or

 Located on unidirectionally arranged fibers respectively

 Fiber bundles, which can be assembled according to the lower illustration to form a semi-finished fiber product in the form of a Gesamtgeleges, wherein the different scrims have different fiber directions;

Fig. 2 shows three plan views of one of the scrim, whose Gelegemodell in a

 A plurality of subdivisions lying next to one another in the fiber direction, or a further schematic representation of the succession of the plurality of model strips in a sequence for generating a laying program for a laying system of a perspective indicated device for producing the semifinished fiber product;

3 is a perspective view of the device for producing the

Semifinished fiber; 4 shows a perspective view of a transporting and fixing device, by means of which the respective clutch can be conveyed from the laying installation to a laying and fixing table;

Fig. 5 is a schematic plan view of a plurality of one above the other

 arranged for forming the semi-finished fiber product; and in

Fig. 6 is a plan view of the apparatus for producing the semifinished fiber product, wherein in particular the laying system and the transport and fixing device for the individual scrim is recognizable.

Fig. 1 shows in a respective plan view of a semi-finished fiber product 10 for a

Fiber composite plastic, which is designed for example as CFK. The

Fiber semi-finished product 10 is formed in the present case of four fiber layers or layers 12, which are also shown in respective plan view. In the present example, the scrims 12 each have different fiber directions of + 45 °, -45 °, 0 ° and 90 °. The semifinished fiber product 10 is in a manner to be described in more detail below a total amount of consisting of the four layers 12, which are interconnected. Each of the scrims 12 comprises a plurality of fiber bundles (rovings) 14, which run parallel to each other or unidirectionally to each other.

In FIG. 2, one of the layers 12, namely the one with the fiber profile of + 45 °, is symbolized in a plan view on the basis of a level model 16. Computer-aided, this pair of models is broken down or subdivided into a plurality of model strips 18, which are each of the same width and run in the fiber direction of the respective fiber bundle 14. Each of these model strips 18 thus selects an equal number of parallel fiber bundles 14 or rovings.

After this first process step, in a further process step, which is shown at the bottom left in FIG. 2, a sequence 20 is shown by a series of these

Model strip 18 formed. This, in principle, endless sequence 20 thus contains regions 22 in which a respective fiber bundle 14 running in a track must be deposited and regions 24 in which the corresponding fiber bundle 14 does not have to be deposited. Based on this sequence 20 is thus - as indicated by the arrow 26 - a laying program for a laying installation 28 of a device for producing the

Semi-finished fiber produced by calculation. The laying unit 28 is in the present

Embodiment designed as a two-dimensional laying system.

In a further process step then takes place a deposition of physical

Fiber bundles 30 of the respective associated strips 32 and lanes of the

corresponding then to be created physical Geleges 12 on the basis of

Put program. The method based on this approach for rapid and at least substantially waste-free depositing of the individual fiber bundles 30 or rovings leads them parallel to the desired strip width in, for example, 16 tracks. This forms the foundation for high deposit speed or deposit amount of the process.

In Fig. 3, the device for producing the respective jelly 12 is shown in a perspective view again. The individual fiber bundles or rovings 30 are stored in a fiber storage 34 and then passed through a spreader 36. For example, 16 tracks with fiber bundles 30 are provided for the strips 32 or laying tracks in the present case. The coming of the Spreizanlage 36 fiber bundles 30 are thereby using the laying system 28 on a

Support material 38, which is, for example, a binder fleece, stored, fixed there and interim cutting of the carrier material 38, the individual scrims 12 arise, which are sometimes referred to as patches. For the other clutches 12, not shown here, similar sequences 20 arise without

Break on the laying system 28 can be generated.

After separating the carrier material 38 or the jelly 12, this can be transported by means of a transport and fixing device 40, which is formed in the present case as a robot with a corresponding gripper to another station in the form of a depositing and fixing table 42. Thus, from the plurality of layers 12, the total amount of semifinished fiber 10 can be generated. With a further laying program, the individual layers in the positions and in those orientations, which are known from the layer structure of the target component or semifinished fiber 10, stored and fixed. This can be seen in particular from FIGS. 4 and 5, which again show the transport and fixing device 40 or the laying and fixing table 42 in a perspective view, as well as the semifinished fiber article 10 in a plurality of layers 12. The fixation of the individual scrim 12 is preferably carried out with the aid of the respective carrier material 38, which also has already made possible the fixation of the individual fiber bundles 30 or rovings. Each intermediate layer or each layer 12 thus contains its own fixation.

The heat input required for this purpose is introduced via a gripper 44 of the transport and fixing device 40 and / or the depositing and fixing table 42. This takes place either flat or deliberately only at desired locations, such as at the outer edges of the total laminate or fiber semi-finished product 10, so that the individual scrims 12 are interconnected only in partial areas. In this way, the fixation can also be selectively prevented, for example

Kink edges, which are to remain flexible and flexible for the subsequent processes such as draping.

After the creation of the Gesamtgeleges or semifinished fiber 10, its final contour is realized by a suitable trimming, which can still be done on the depositing and fixing table 42. At the same time protruding support material 38 is removed. Thereafter, the finished Gesamtgelege or semi-finished fiber can be removed. The remaining clippings are left by the depositing and

Fixing table 42 removed.

In particular, in conjunction with FIGS. 3 and 6, the device for the

Production of the semifinished fiber 10 will be explained in detail again. By means of the fiber storage device 34 and the spreading device 36, a fiber supply and spreading is to be achieved, wherein an incremental promotion of the individual fiber bundles should be given in different individual speeds. The spreading of the individual fiber bundles 30 to a defined width and filament density also takes place in this area, as well as a maintenance of the voltage in the individual laying heads 46 of the laying unit 48 in the laying system 28. A preferred

Embodiment provides in particular a supply and spreading, which can be done within the line (online). Also advantageous is a modular structure of the fiber supply and spreading for the flexible realization of different

Working widths of the laying system 28. Optionally, an automatic connection to a follower roll in the fiber storage 34 is conceivable. Other possible embodiments do not provide a spread, but the supply vorbebinderten material, the

Spread then takes place off-line (offline). Furthermore, the

Fiber spreading also take place only in the respective laying head 46. In the present case is It can also be seen that the promotion of the individual fiber bundles 30 via dancer rolls.

The substrate feeding and conveying device for the substrate 38 may not only have the function of feeding and conveying the substrate or the substrate

Carrier material 38 take over, but it also takes place thereby a temporary fixation of the substrate against displacement in the area of the laying facility 28. A particularly preferred embodiment provides for the use of a carrier material in the form of a binding fleece from the roll. In this case, a continuous conveyance on a belt or on a chain conveyor is preferably provided. The fixation of the substrate can be done by vacuum, by Velcro, by appropriately roughened surfaces or the like in the area of the laying system 28.

In addition, a mechanical fixation on the edge by means of rollers or needles is conceivable. Possible further embodiments see other substrates such as

For example, fiberglass webs ago. It is also conceivable to deposit the substrate on a moving table. The deposition of the substrate on a static table in conjunction with a moving laying unit is also conceivable. Optionally, even no substrate can be used, wherein the fixation takes place only after depositing by a spray binder.

The laying installation 28 preferably comprises a laying unit 48 consisting of one or more placing heads 46 and cutting devices arranged next to or offset one behind the other and working in parallel. The laying heads 46 include a

Fiber feed, pressure rollers, a fiber heater, and a fiber and

Vliesbeschnitt. By means of these laying heads 46 of the laying unit 48, a geometrically correct laying down of the spread fiber bundles 30 on the respective substrate or carrier material 38 is to be carried out. The laying takes place

or placing the individual fiber bundles 30, which are within their track, according to the control from the laying program. In addition, by means of the laying heads 46, the spread rovings or fiber bundles 30 on the

Fixed substrate and trimmed by means of the laying heads 46 associated cutting device according to sequence 20. Furthermore, a cutting device is provided in the region of the laying unit 48, by means of which the substrate or

Support material 38 can be cut off after the end of the individual cover 12. Preferred embodiments provide for parallel laying heads 46 and cutting devices which are each offset in pairs in order to deposit the spread fiber bundles 30 in abutment to be able to. Also advantageous is a modular construction for the flexible realization of different working widths of the laying installation 28.

In this case, a separation of the laying and cutting units is preferably provided. The fixing of the fiber bundles 30 can preferably take place by heating by means of current in the region of the laying heads 46. The cutting or breaking of the individual fiber bundles 30 can be done for example by a fallmeter or ultrasonic knife.

Possible embodiments of the laying heads 46 and cutting devices in the region of the laying unit 48 provide that the cutting device is integrated directly into the laying heads 46. Furthermore, the use of a movable knife behind the laying heads 46 is conceivable. The fixation of the individual fiber bundles 30 on the

Carrier material 38 can also take place, for example, by heating a pressure roller and / or the transport and fixing device 40. Cutting the fiber bundles by other techniques such as by laser welding is also conceivable.

Finally, the use of moving laying and cutting heads in conjunction with a static table is conceivable.

The transport and fixing device 40 has in addition to the transport of the individual

Teilgelege 12b of the conveyor to the depositing and fixing table 42 also the task of correct geometric alignment of the partial garnish 12b on the depositing and fixing table 42 and the fixing of the scrim 12 on the depositing table according to the previous interim result. Optionally, one or more degrees of freedom may be provided by the gripper 44 to assist in three-dimensionally depositing the partial garnish 12b. Preferred embodiments provide for the realization of the transport by an industrial robot. Preferably, a planar gripper 44 is used, wherein according to FIG. 5, a matrix-like structure of gripping and heating elements is provided. The gripping can be done for example by vacuum and the heat input for fixing the individual scrim 12 can

for example, by electricity, in particular by individually controllable heating elements done. The checking and control of the geometric alignment can be done with the aid of cameras. Other possible embodiments provide for the realization by other kinematics such as gantry robots or rod kinematics. The gripping can also be done by other techniques such as needle grippers.

Also, the fixing of the scrim 12 with each other by other techniques such as by microwave technology. The examination and control of If necessary, geometric alignment can also be effected by another sensor system or also completely without sensor insert.

The depositing and fixing table 42 has in particular the function of holding the underlying Geleges. The depositing and fixing table 42 serves as an abutment for the fixation of the scrim or partial garnish 12b by means of the gripper 44. Also, the table 42 also optionally forms an abutment in the final trimming of the semifinished fiber product 10. Preferred embodiments see a separation of the functions of depositing and the fixing and the functions of the Beschnitts and cleaning through a double table with 2 drawer-like interchangeable levels before, creating a

continuous deposition of Teilgelege 12 b on each of the levels is possible. This has significant speed advantages. It is also possible that several robots work in parallel on the laying installation (28), as shown in FIG. The depositing and fixing as well as the trimming and cleaning can each be done by an industrial robot. Furthermore advantageous is an exchangeable laying surface with vacuum function and trim groove. Other possible embodiments provide for the realization of other kinematics such as by a gantry robot or other implementations of the laying surface, for example with a wear-prone material such as brushes, cork or rubber. Instead of trimming the

Semi-finished fiber 10 is also a punching conceivable.

The programming and control technology of the laying installation 28 includes, in particular, an algorithm and programs for creating the laying programs for the individual

Fiber bundle 30 and the clutch 12 from CAD data of the corresponding components. In addition, this results in a control of the overall process of the laying system 28 and optionally a virtual commissioning. Preferred embodiments provide for a calculation of the laying program on standard computer outside the production line and a control via PLC within the production line. As another

Embodiments are also other, corresponding to the prior art

Programming and control techniques conceivable.

Claims

 claims
A method of making a semi-finished fiber product (10), in particular for a fiber composite plastic, comprising at least one scrim (12) of a plurality of unidirectionally extending fibers or fiber bundles (30), comprising the following steps:
 Subdivision of a gusset model (16) of the corresponding at least one girder (12) into one or more of the model strips (18) running in the direction of the fibers, each of which in turn extends a plurality of unidirectionally extending ones
Comprise model fibers or model fiber bundles (30);
 Generation of a laying program (26) for a laying plant (28) on the basis of
Model strips (18) having their respective plurality of unidirectionally extending model fibers or model fiber bundles (30);
 Depositing the fibers or fiber bundles (30) of the respectively associated ones
Strip (32) of the corresponding Geleges (12) by means of the laying system (28) based on the laying program (26).
Method according to claim 1,
 characterized in that
 in the subdivision of the gel model (16) the model strips (18) in a sequence (20) are placed behind each other and for this sequence a laying program (26) for a laying plant (28) is generated, based on which the supplied fibers or fiber bundles (30) according to their position in the model strips (18) are stored.
3. The method according to claim 1 or 2,
characterized in that the fibers or fiber bundles (30) by means of the laying system (28) on a
 Carrier material (38) stored and there on the basis of the laying program (26)
 be cut off.
4. The method according to claim 3,
 characterized in that
 the carrier material (38) after laying the fibers or fiber bundles for a
 Separated model strip and the resulting partial cover (12 b) is transported to another station (42).
5. The method according to any one of the preceding claims,
 characterized in that
 the plurality of layers (12) are joined together to form a total layer (10), and that only partial regions of the layer (12) are interconnected.
6. The method according to claim 5,
 characterized in that
 a plurality of layers (12) are joined together with fibers or fiber bundles (30) of the strips (32) in different orientations to the overall layer (10).
7. The method according to any one of the preceding claims,
 characterized in that
 the Gesamtgelege (10) is trimmed after its production in a final contour.
8. An apparatus for producing a semi-finished fiber product (10), in particular for a fiber composite plastic, with at least one clutch (12) from a plurality of unidirectional fibers or fiber bundles (30), with a laying unit (48) of a laying plant (28), by means of which the fibers or fiber bundles (30) of respectively associated strips (32) of the corresponding web are laidable by means of a laying program (26), wherein to generate the laying program (26) a gel model (16) of the corresponding at least one web (12) in one or several extending in the fiber direction, juxtaposed Model strip (18) is divided, each comprising a plurality of unidirectionally extending model fibers or model fiber bundles (30).
9. Apparatus according to claim 8,
 characterized in that
 the laying unit (48) comprises a plurality of laying heads (46) by means of which the fibers or fiber bundles (30) can be laid and cut on the basis of the laying program (26).
10. Apparatus according to claim 8 or 9,
 characterized in that
 a transport and fixing device (40) is provided, by means of which the plurality of layers (12) can be connected to one another by heat input in order to form a total layer (10).
PCT/EP2011/004443 2010-09-08 2011-09-03 Method and device for producing a semifinished fiber product WO2012031723A1 (en)

Priority Applications (2)

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DE201010044721 DE102010044721A1 (en) 2010-09-08 2010-09-08 Method and device for producing a semi-finished fiber product

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* Cited by examiner, † Cited by third party
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JP2014522747A (en) * 2011-06-22 2014-09-08 ザ・ボーイング・カンパニーThe Boeing Company Ply automatic lamination system and lamination method
US9969131B2 (en) 2011-06-22 2018-05-15 The Boeing Company Automated ply layup system
EP3072657A1 (en) 2015-03-25 2016-09-28 Compositence GmbH Method and device for manufacturing a semi-finished fibre product
WO2016150567A1 (en) 2015-03-25 2016-09-29 Compositence Gmbh Method and apparatus for manufacturing a roving preform

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