Fiber winding device and method for producing a fiber material blank

Abstract

The present invention relates to a winding device (1) and a method for winding a frame (7) to produce a fiber material blank (18). For this, a frame (7) is clamped in a clamping device and put into rotation about a rotational axis (5) by a drive (3). According to the invention it is provided that fixing pins (6) are folded down during the passing of a thread (9) to be wound.

Claims

1. Winding device for producing a flat fibre material blank comprising a stationary device with a drive and a clamping device, wherein a frame can be clamped in the clamping device, so that by rotation of the frame a fibre material in the form of a thread or fibre roving is wound on this, wherein a rotational axis is arranged centrally to the clamping device, wherein a fixing disc or star-shaped arms, on which holders are displaceably mounted, extend from the rotational axis, and the holders project from the fixing disc or the arms, wherein by displacement of the holders, frames having mutually different external geometries can be clamped in the clamping device and are rotatable through the drive, and so that a thread eye movable relative to the frame is provided for feeding the thread, wherein when executing the rotational movement and before the passing of each holder by the thread eye, the holder is shiftable relative to the arm or the fixing disc.

2. The winding device according to claim 1, wherein the holders are designed as fixing pins and/or the holders in the radial direction R in relation to the rotational axis are mounted relatively displaceable to the arms or the fixing disc.

3. The winding device according to claim 2, wherein the fixing pins can be folded down outside in relation to the radial direction R to the rotational axis or that the fixing pins can be folded away rotationally about the radial direction R or that the fixing pins are displaceable in parallel with the parallel displacement taking place in the radial direction R towards the outside, or that the fixing pins are mounted retractably in relation with respect to a front of the arms or the fixing disc.

4. The winding device according to claim 2, wherein the fixing pins are passively shiftable or that the fixing pins are actively shiftable by a control actuator.

5. The winding device according to claim 4, wherein a thrust bearing is connected upstream to the passively mounted fixing pins in the rotational direction R in front of the thread eye, wherein the fixing pin passing in each case through the thread eye is shifted by the passing of the thrust bearing due to the rotational movement .

6. The winding device according to claim 5, wherein the thrust bearing is movably mounted relative to the stationary device.

7. The winding device according to claim 1, wherein the thread eye is movably mounted relative to the clamped frame, from a front to a back of the frame, so that the thread can be wound on the front and the back of the frame.

8. The winding device according to claim 1, wherein the frames have outer circumferential teeth, wherein when executing the rotational movement the thread exiting the thread eye is placed in an intermediate space between two extensions.

9. The winding device according to claim 1, wherein the holders are movably mounted under pretension in the radial direction R on the arms or the fixing disc in guide grooves, wherein the guide grooves extend in the radial direction R, and the holders are mounted parallel in the radial direction R.

10. The winding device according to claim 1, wherein at least two frames offset parallel to the arms or the fixing disc are clamped at the same time, wherein each frame is wound from a separate thread eye, wherein the at least two frames are arranged at a distance c from each other.

11. The winding device according to claim 1, wherein the frame is hollow and is wound.

12. A method for producing a fibre material blank, wherein this is produced as a flat fibre material blank in a winding device according to claim 1 by winding a thread on a frame, according to the following steps: providing the frame with individually desired outer geometry, clamping the frame by sliding the holders on the arms or the fixing disc, wherein a distance a is formed between the arms or fixing disc and a back of the frame, attaching a beginning of the thread to the frame and rotating the frame about the rotational axis, relative movement of the thread eye from a front side of the frame to a back side and in turn to the front side, so that in each case a section of the thread covers a hollow interior of the frame on the front side and back side, or relatively moving the thread eye such that the fibre roving exiting from the thread eye is wound around an extension on an outer side of the frame, so that the sections of the thread only cover the front side or the back side of the hollow interior of the frame, removing the fibre material blank wound on the frame.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Preferred embodiment variants are illustrated in the schematic figures. These serve for easy understanding of the invention.

(2) FIG. 1 shows the winding device according to the invention in front view with a clamped frame,

(3) FIG. 2 shows a side view according to FIG. 1,

(4) FIG. 3 shows a schematic diagram of the winding device with an asymmetrically extending frame with inwardly and outwardly oriented curves,

(5) FIG. 4 shows a partial section of an outer contour of a frame with extensions protruding towards this,

(6) FIG. 5 includes FIGS. 5A-5D which shows various wound fibre material blank weaves on a frame,

(7) FIG. 6 shows a plan view of a winding device according to the invention with a plurality of parallel mutually offset clamped frames,

(8) FIG. 7 shows a perspective view of a winding device according to the invention with a plurality of parallel clamped frames,

(9) FIG. 8 includes FIGS. 8A-8C which show a schematically illustrated winding process of the winding device of FIG. 7 and

(10) FIG. 9 shows a side view according to FIG. 2 with recessed fixing pin.

(11) In the figures the same reference numerals are used for the same or similar components, even if a repeated description is omitted for reasons of simplification.

DETAILED DESCRIPTION OF THE INVENTION

(12) The winding device 1 illustrated in FIGS. 1 and 2 has a stationary device 2 to which a drive 3 is attached, wherein star-shaped arms 4 extend from the drive 3. As an alternative to the star-shaped arms 4, a continuous, non-illustrated fixing disc may also be formed. The drive 3 lies in the rotational axis 5 of the winding device 1. If the drive 3 is designed as an electric lathe, then its central longitudinal axis is equal to the rotational axis 5 of the winding device 1. The rotational axis 5 forms the central point and thus the point of rotation or the rotational axis 5 of the arms 4. The drive 3, not illustrated in detail here, may also be offset parallel to this, for example, and then the rotational movement of the drive 3 can be transferred via a timing chain or a belt drive such that the arms 4 execute a rotational movement about the rotational axis 5. Displaceable fixing pins 6 are mounted on the arms 4 themselves in a radial direction R in relation to the drive 3, wherein the fixing pins 6 themselves are formed protruding orthogonally towards the arms 4. The fixing pins 6 can perform a relative movement R6 on the arm 4 in each case, which is made possible, for example, by guide grooves not illustrated in detail. Between the fixing pins 6 themselves a hollow frame 7 is clamped. This frame 7 can perform a rotational movement , wherein the arms 4 are set in motion via the drive 3. The rotational movement can be performed in relation to the image plane both in the left rotational direction and in the right rotational direction. The rotational direction and rotational speed can also be changed in each case during the winding process according to requirements.

(13) In order to perform the winding process, one end 8 of a thread 9, which is fed as a continuous thread via a thread eye 10, is fixed to the frame 7. The frame 7 then undergoes approximately half a rotation, substantially illustrated here, so that a section 11 of the thread 9 extends over the hollow interior 12 of the frame 7. With the passing of each fixing pin 6 of the thread eye 10, the fixing pin 6 would collide with the thread 9 itself or with the thread eye 10. In order to avoid such a collision, it is provided according to the invention that the respective fixing pin 6 passing the thread eye 10 can be folded away. In the embodiment shown here, the fixing pin 6 passing the thread eye 10 or the thread 9 is folded outwards in the radial direction R. In the frame of the invention it would also be conceivable that the fixing pin 6 is folded away rotating about the rotational direction R. The fixing pin 6 is then returned again to its clamped position (dashed line) by a spring, not illustrated in detail, for fixing the frame 7. The next fixing pin 6 in the rotational direction is then again folded away shortly before passing the thread 9 and respectively the thread eye 10 and after passing the thread eye 10 it also returns again to its fixing position. Also illustrated is that the thread eye 10 in both the X-direction and the Z-direction, as well as in the Y-direction, is movable relative to the clamped frame 7 or to the drive 3. In particular, through the change in height in the Z-direction, the distance b between thread eye 10 and the respective outer edge 13 of the frame 7 can be set and also through movement of the thread eye 10 in the Y-direction the thread 9 exiting from the thread eye 10 can be pivoted on a front side 14 or on a back side 15 of the clamped frame 7 and back again, so that the section 11 of the thread 9 wound via the hollow interior 12 is wound alternately over the front side 14 and the back side 15 of the frame 7.

(14) FIG. 3 shows a simplified embodiment of the winding device 1 with an asymmetrical, in particular kidney-shaped, extending outer contour of the frame 7. Through the rotational axis 5 of the centrally arranged drive, it is here possible to clamp a frame 7 with a thus configured outer contour on the one hand by displacement in the radial direction R in relation to the rotational axis 5 of the drive and then to let the frame 7 rotate about the rotational axis 5 of the drive.

(15) FIG. 4 shows a partial section of an outer contour of a frame 7 with extensions 16 protruding towards this. The frame 7 is in each case put down in an intermediate space 17 between two extensions 16 and carried along by the additional rotational movement . Not illustrated in detail, the foldable fixing pins 6 either lie flat against the extensions 16 or have an additional spacer means so that when executing the folding movement, the fixing pins 6 are not hindered in the folding movement by the extensions 16.

(16) FIGS. 5A-5D show various possibilities for winding of fibre material blanks 18 on a respective frame 7. FIG. 5A shows a fibre material blank 18, in which all respective sections 11 of the thread 9 which extend over the hollow interior region 12 of the frame 7 extend unidirectionally oriented in one direction. This variant can, for example, only be wound over the front side 14 or only over the back side 15 of the frame 7 or, however, also be wound over the front side 14 and the back side 15 of the frame 7. For this purpose, the frame 7 has in each case corresponding extensions 16 on its outer circumferential contour.

(17) In contrast, FIG. 5B shows a winding variant, in which the respective sections substantially cross, illustrated here at right angles. Here too, it can again be wound over a front side 14 or only over a back side 15, but also over both a front side 14 and a back side 15.

(18) FIG. 5C shows a variant of the fibre material blank 18, in which the sections in each case are wound over the front side 14 and the back side 15 of the frame 7 and thereby extend unidirectionally to each other. Consequently, the respective sections, which extend over the inner hollow region 12 of the frame 7, are oriented in different directions and intersect. This results in an increased fibre density in a roughly centrally arranged enveloping circle region as well as a region cut out from the thread 9 in a central point 19.

(19) In FIG. 5D a winding is shown, in which selectively offset to the central hollow region 12 in relation to the image plane an increased fibre density is wound downwards. In particular, an asymmetrical winding has been made here so that a fibre material blank 18 is created for the production of, for example, a U-shaped extending fibre composite material component with selectively concentrated fibre density.

(20) FIG. 6 shows a plan view of a winding device 1 according to the invention with a plurality of parallel mutually offset clamped frames 7. The frames 7 are arranged in each case parallel mutually offset at a distance c. The holders are again formed in the shape of fixing pins 6. From the drive 3 the arms 4 extend in the radial direction R, wherein the fixing pins 6 are then arranged displaceably on the arms 4 in the radial direction R. These make contact on a respective outer edge 13 of the outer contour of the frame 7. On the side opposite the drive 3 a counterbearing 20 is provided, wherein the counterbearing 20 also has arms 21 or a fixing disc, on which bearings 22 are arranged. A free end 23 of the fixing pins 6 is arranged in the fixing position resting on the bearings 22. The bearings 22 are also then arranged displaceably in the radial direction R on the arms 21 of the counterbearing 20. In the case of frames 7 arranged parallel mutually offset, each frame 7, not illustrated in detail in FIG. 6, is assigned its own thread eye, wherein the thread eyes are also arranged parallel mutually offset and perform the winding at the same time.

(21) FIG. 7 further shows a perspective view of the winding device 1 with a plurality of clamped, parallel mutually offset frames 7. The frames 7 are thereby clamped parallel mutually offset at a distance such that a fibre material blank 18 is wound on each frame 7. For this purpose, each frame 7 is assigned its own thread eye 10, wherein the individual thread eyes 10 are also arranged parallel mutually offset at a distance and each frame 7 is also supplied with its own thread 9. The winding device 1 has for this purpose star-shaped arms 4 extending from the central drive 3, wherein in each case fixing pins 6 are arranged transverse to the arms 4, wherein the fixing pins 6 work here according to the principle of a barrier or bar. The thread eyes 10 are arranged on a central rail 24. The rail 24 is pivotally mounted on a holding rail 25 in the radial direction R and in the rotational movement , wherein the holding rail 25 may be formed at the same time as a thrust bearing for the folding movement of the fixing pins 6.

(22) If a rotational movement in the illustrated direction now takes place, then the fixing pin 6 passing the thread eyes 10 or the holding rail 25 is raised in the radial direction R in relation to the outside according to the principle of a barrier. This is well illustrated in FIG. 8C, in which the fixing pin 6 passing the holding rail 25 is in the fully raised state. Also illustrated is that the thread eyes 10 are mounted movable relative to the drive 3 such that they can both enter the intermediate space between the frames 7 and can also be pivoted with respect to the frames 7. In FIG. 8A the thread eyes 10 are fully extended and in FIG. 8C these are inserted into the intermediate spaces between the frames 7. It is also possible that the thread eyes 10 are also shifted in the longitudinal direction L, in order, for example, to wind the thread 9 from a front side of the frame 7 to a back side of the frame 7.

(23) After the fixing pin 6 folded down in FIG. 8C has passed the thread eyes 10 or the holding rail 25, this folds back to the frame 7 and thus holds it fixed in position in the clamping position. The subsequent fixing pin 6 then executes the same movement when passing the thread eye 10.

(24) FIG. 9 shows an embodiment analogous to FIG. 2, wherein, however, the fixing pin 6 passing the thread eye 10 is not folded away, but has been recessed with respect to a front side 26 of the arm 4.

REFERENCE NUMERALS

(25) 1winding device 2stationary device 3drive 4arm 5rotational axis of 3 6fixing pin 7 frame 8end of 9 9thread 10thread eye 11section of 9 12hollow interior of 7 13outer edge of 7 14front side of 7 15back side of 7 16extension 17intermediate space 18fibre material blank 19centre 20counterbearing 21arm of 20 22bearing 23end of 6 24rail 25holding rail 26front side of 4 rotational movement Rradial direction R6relative movement adistance bdistance cdistance Xdirection Ydirection Zdirection Llongitudinal direction