EP3515695A1

EP3515695A1 - Sheet laying device for producing a fibre-reinforced composite material

Info

Publication number: EP3515695A1
Application number: EP17791538.6A
Authority: EP
Inventors: Michael Schneiderbauer
Original assignee: Fill GmbH
Current assignee: Fill GmbH
Priority date: 2016-09-21
Filing date: 2017-09-20
Publication date: 2019-07-31
Also published as: AT518786B1; AT518786A4; WO2018053563A1

Abstract

The invention relates to a sheet laying device (1) for producing a fibre-reinforced composite material, said sheet laying device (1) comprising: - a lay-up mould (3) for receiving a scrim (4); - a compression device (14) for pressing a web (5) of a sheet-type material onto a lay-up mould (3) or a scrim (4); and - a handling device (16) for displacing the compression device (14) relative to the lay-up mould (3). The invention also relates to the compression device (14) and to a method for producing a fibre-reinforced composite material.

Description

Foil laying device for producing a fiber composite material

The invention relates to a film laying device for producing a fiber composite material or a pressing device formed in the film laying device and a method for producing a workpiece on the film laying device.

The term film or film-like in the present context, a flat structure understood that is flexible, at least in the longitudinal direction, preferably also in the transverse direction, in particular fabric and pre-impregnated fabric, prepreg, textile materials, etc.

Today, fiber composite materials are used in many industrial sectors. Especially in aviation and the automotive industry, such materials are being used more and more frequently due to their high lightweight potential. The high volume production of fiber composite components requires the development of new, automated processes to enable cost efficient production.

For the automated production of fiber composite components with carbon or glass fiber semi-finished products, processes are necessary which allow a defined deposition of the textile materials on a three-dimensionally shaped surface.

In the manufacture of rotor blades of wind turbines, it is known, for example, to apply belts to increase the buckling rigidity in the longitudinal direction along the rotor blade inner wall. These straps are usually produced from girth bands of constant width in the laminating process. Such gussets may be, for example, laminates of GFRP films. In addition to the production of rotor blades can be used from these gussets belts as reinforcing or structuring elements in many other applications, such as in the automotive industry. However, when forming flat 2D semi-finished products into a doubly curved 3D shape, the material must be deformed to ensure high quality wrinkle-free deposition. In particular, it is necessary that individual webs of the film-like material are superimposed as possible without wrinkling. From WO2010129492 A a device of the aforementioned type has become known, in which for applying / laying the film along an elongated shape with a concave cross section for producing a belt for a rotor blade at one end of the mold a plurality of storage rollers of the sheet-like material stationary in a Frame are arranged. From each of these rolls a film layer is peeled off and placed in the mold. After the layer has been built up, the individual film layers are connected to one another by lamination to form the belt. A disadvantage of the known state of the art is that, with a more complicated three-dimensional surface geometry of the mold, wrinkling and / or warping of the material may occur. So far, no solutions have become known which make it possible to lay a film automated and yet wrinkle-free.

From US 2007/0044922 AI a pressing device for a web of a sheet-like material is known. The pressing device has a flexible Anpressriemen, which is deflected by a broad role and a segmented role with individual sliding segments. A disadvantage of this design is that the contact pressure is adaptable only to a small extent to the surface contour of a laying form and thus a wrinkle-free laying is only partially possible.

The object of the present invention was to overcome the disadvantages of the prior art and to provide an apparatus and a method by means of which individual webs of a film can be automated and yet laid without wrinkles. This object is achieved by an apparatus and a method according to the claims.

According to the invention, a pressing device is designed for a film laying device. The pressing device comprises:

a pressing belt having a pressing surface formed on an outer side of the pressing belt, which is adapted to press a sheet of a sheet-like material onto a laying form or a scrim;

- A support element on which the pressing element is received, wherein the carrier element is designed for receiving on the film laying device. The support element has at least two first deflecting rollers and at least two second deflecting rollers, between which the pressure belt is tensioned, wherein at least one of the first deflecting rollers is disposed opposite one of the second deflecting rollers and the deflecting rollers form a deflecting roller pair and wherein the at least two deflecting roller pairs are displaceable relative to one another in a clamping direction ,

An advantage of the inventive expression of the pressing device is that the contact surface of the Anpressriemens can apply a uniform pressure on the web of the film-shaped material even with a contoured surface of the form. In particular, the contact surface of the Anpressriemens can adapt flexibly to the contour of the laying form. By using the pulleys, the pressure belt is supported or the stability belt is given sufficient stability, so that the pressure belt can have a good rolling performance. In particular, by moving the pulleys in pairs it can be achieved that the pressure belt can be adapted as flexibly as possible to the surface of the laying form, since the circumferential length of the pressure belt in the partial sections does not have to change. As a result, the possible displacement of the individual segments can be increased.

Furthermore, it may be expedient if the first deflection rollers are each coupled to a cylinder acting in the tensioning direction. The advantage here is that the individual deflection rollers can be moved relative to each other through the cylinder and can be pressed in the pressing direction.

Furthermore, it can be provided that the cylinders are coupled together by means of a fluid system, wherein when the two first deflection rollers are pressed against an uneven surface, the two first deflection rollers are freely displaceable relative to each other due to the coupling through the fluid system, wherein in all cases coupled to the fluid system Cylinders the same internal pressure prevails. The advantage here is that a uniform contact pressure across the width of the contact pressure can be achieved by the fluid system.

In addition, it can be provided that the fluid system is coupled to an external supply device, by means of which the internal pressure in the fluid system is actively adjusted. bar is. The advantage here is that can be varied by this measure, the contact pressure of the pressing or that leaks of the fluid system can be compensated. Also advantageous is an expression according to which it can be provided that the individual cylinders are designed in the form of pneumatic cylinders. In particular, the possible traversing speed can be chosen very large in pneumatic cylinders, since a gas has a high dynamic viscosity. In addition, a gas is compressible and can thus assume a damping or resilient property in order to be able to reduce the mechanical load on the individual components.

According to a development, it is possible that in each case the second deflection roller is biased by means of a spring element relative to the first deflection roller. The advantage here is that by this measure the Anpressriemen can be stretched between the two pulleys.

Furthermore, it may be expedient if the second deflection rollers are respectively coupled to a cylinder acting in the tensioning direction. The advantage here is that by this measure, the tension can be actively adjusted in the Anpressriemen.

In addition, it can be provided that at least one of the deflection rollers is coupled to a drive svorrichtung. The advantage here is that by this measure the pulleys and thus the Anpressriemen can be actively driven. As a result, the drag torque arising in the pressure belt due to the flexing work can be reduced, or an overfeed or a tensile force can be actively set in the pressure belt.

Furthermore, it can be provided that the deflection rollers have a contoured peripheral surface, in particular a V-shaped recess, and the pressure belt has on its inside a corresponding contouring. By this measure, it can be prevented that the Anpressriemen slipping in the transverse direction. In addition, can be achieved by this measure that the Anpressriemen is stretched by the pulleys in the transverse direction when adapted to the contoured surface of the form. In a first Variant can be provided here that all pulleys have such a contoured peripheral surface with a corresponding counterpart in the drive belt. In a further variant, it can be provided that, for example, only the two outer deflection rollers have such a contouring and the inner deflection rollers have a smooth surface.

According to a particular embodiment, it is possible that in each case the first deflection roller and the opposite second deflection roller of the Umlenkrollenpaares are arranged on a common pivot unit, so that the individual Umlenkrollenpaare are pivotable relative to each other. By this measure, the contour of the Anpressriemens can be further varied. For example, it can be made possible by this measure that the Anpressriemen is formed at its Berührlinie to the contour of the laying form V-shaped, so that, for example, the center of the Anpressriemens is moved in the first deflecting rollers in the rolling direction before. In the rolling direction means in the direction of the tensioned strand of the band.

According to an advantageous development can be provided that in each case the first guide roller and the opposite second guide roller of Umlenkrollenpaares are arranged on a common linear guide, so that the individual Umlenkrollenpaare are relatively displaceable transversely to the clamping direction. By this measure, the same effect as described in the previous paragraph can be achieved.

In particular, it can be advantageous if the pressure belt is formed from a flexible material, the outside of the pressure belt forming a straight line in the original state over the width of the pressure belt and the pressure belt is deformable such that the outside of the pressure belt over the width of Anpressriemens can take a contoured shape. The advantage here is that by this measure the Anpressriemen can adapt flexibly to the contoured surface of the form. Furthermore, it can be provided that the Anpressriemen has structuring on the outside thereof. The advantage here is that a good bond between the belt and the web of the sheet-like material can be produced by this measure. As a result, the web of the film-like material, for example, due to the adhesion to the Anpressriemen be drawn in the width.

In addition, a film laying device is provided for producing a fiber composite material. The foil-laying device comprises:

- A laying form for receiving a Geleges;

- A pressing device for pressing a sheet of a sheet-like material on a laying form or a clutch;

- A handling device for moving the pressing device relative to the laying form.

Also advantageous is an expression according to which it can be provided that the pressing device is received on the handling device. By this measure, the pressing device can be manipulated and thus moved relative to the laying form. The handling device can be designed, for example, in the form of a six-axis robot, in particular a swivel-arm robot.

According to a development, it is possible that two clamping devices, in particular grippers, are formed, which serve to tension the web of the film-shaped material, wherein the pressing device is arranged between the two clamping devices. The advantage here is that it can be achieved by this measure that the web of the sheet-like material between the two clamping devices can be biased in the longitudinal direction and can be pressed by means of the pressing under tension in the laying form. As a result, wrinkling when laying the web can be avoided as possible.

In the method for producing a workpiece from a film-shaped material, it is provided that in a step i) a web of the film-shaped material is cut and this web is taken in a step ii) by means of two clamping devices, and positioned over a laying mold, wherein a step iii) the web is pressed by means of a contact surface of a pressing device against the laying mold and by moving the pressing device, the web is rolled into the laying mold, wherein the contact surface of the pressing device adapts flexibly to the contour of the laying mold, wherein during step iii) the web is clamped by means of the clamping devices. In addition, it may be provided that the outer side of the Anpressriemens stretches during pressing against the contoured surface of the laying form in the transverse direction and in that the sheet of the sheet-like material adheres to the outside of the Anpressriemens and is also stretched in the transverse direction. By this measure, it can be achieved that the path of the film-like material seen in plan view forms a grid with straight lines and thereby the formation of gaps or gaps between the individual webs is possible as far as possible. Furthermore, it can be provided that, seen in the rolling direction before the pressing device, a stretching device for stretching the web in the longitudinal direction or in the transverse direction is formed. The advantage here is that the web can be adapted to the surface of the form to avoid warping or wrinkles. Furthermore, it can be provided that during the pressing of the web to the contoured

Surface of the laying mold and thus the rolling of the web on the contoured surface, the clamping devices are moved in accordance with the shortening of the web in the direction of the pressing to compensate for this reduction can. This can prevent excessive tensioning of the web. This necessary movement can be calculated in the internal computer unit based on the contour. Furthermore, it is also conceivable that the clamping devices are mounted resiliently to accommodate only small displacements.

In a first embodiment, it may be provided that the individual cylinders for pressing the first deflection rollers in the clamping direction each have the same Kolbenquerschnitts- area. It can thereby be achieved that, for the same working pressure in the individual cylinders, the same pressing force can also be applied by the cylinders.

In a further embodiment, it can be provided that the individual cylinders have different piston cross-sections for pressing the first deflection rollers in the clamping direction. In particular, it is conceivable that, for example, when using a plurality of juxtaposed cylinders, the outer cylinder a larger or smaller Have piston cross-sectional area, as the centrally located cylinder. It can thereby be achieved that with the same inner working pressure of the outer cylinders, a greater or even a lower pressing force than from the centrally arranged cylinders can be applied.

For a better understanding of the invention, this will be explained in more detail with reference to the following figures.

In each case, in a highly simplified, schematic representation:

Fig. 1 a) is a perspective view of a first embodiment of a Folienlege- device with two portals and a cross member received therebetween; 1 b) is a perspective view of a further embodiment of a Folienle- gevorrichtung with Schwenkarmrobotern;

2 is a perspective sectional view of an embodiment of a pressing device in the idle state;

3 is a perspective view of an embodiment of the pressing device in the state adapted to a contour;

4 is a schematic sectional view of a further embodiment of the pressure device with fluid system and piston cross-sectional areas of equal size;

5 shows a schematic sectional view of a further embodiment of the pressure device with fluid system and piston cross-sectional areas of different sizes;

Fig. 6 a) is a schematic sectional view of another embodiment of the pressing device, each with a piston rod for the first guide roller and a respective piston rod for the second guide roller; 6 b) is a schematic sectional view of a further embodiment of the contact pressure device, each with a cylinder for the first deflection roller and a respective cylinder for the second deflection roller;

7 is a schematic sectional view of a further embodiment of the contact pressure device with pressure springs and drive device;

Fig. 8 is a schematic representation of the chord length of a web;

9 is a sectional view of a first embodiment of a stretching device according to the section line IX-IX in Fig. 10.

Fig. 10 is a plan view of the first embodiment of the stretching apparatus;

11 is a sectional view of a second embodiment of the stretching device according to the section line XI-XI in Fig. 12 .;

Fig. 12 is a plan view of the second embodiment of the stretching apparatus;

Fig. 13 is a perspective view of a third embodiment of a stretching device.

By way of introduction, it should be noted that in the differently described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosures contained in the entire description can be mutatis mutandis to the same parts with the same reference numerals or component names. Also, the location information chosen in the description, such as top, bottom, side, etc. related to the immediately described and illustrated figure and these position information in a change in position mutatis mutandis to transfer to the new location.

Fig. La shows an embodiment of a film laying apparatus 1 for producing a workpiece 2 from a film-shaped material, for example a prepreg, or a other textile material provided with a resin. The film-laying device 1 has a laying mold 3, in which a scrim 4 is constructed from individual webs 5 of the film-shaped material, wherein the scrim 4 forms the workpiece 2 in its final version. In particular, it is provided that the laying mold 3 on a receiving side 6 for receiving the jelly 4 has a contoured surface, so that a complex workpiece 2 can be produced.

Furthermore, the film laying device 1 has two clamping devices 7, by means of which the web 5 of the film-shaped material can be received and held for transfer to the laying mold 3 or the scrim 4.

In particular, it can be provided that the clamping devices 7 are designed in the form of grippers.

The clamping devices 7 can be mounted to be linearly movable at least in two mutually orthogonal directions and to be rotatable about at least one axis. The directions of movement of the clamping devices 7 are indicated in Fig. 1 with arrows. The clamping devices 7 may for example be arranged linearly displaceable on two opposing portals 8 of the film-laying device 1. Between the two portals 8, a two longitudinal beams 9 of the portals 8 connecting cross member 10 may be arranged. The cross member 10 may be guided in a longitudinal extension of the longitudinal member 9 to this slidably. The clamping devices 7 in turn can be displaceably mounted along the cross member 10 and transversely to the longitudinal extent of the longitudinal members 9. In addition, the clamping devices 7 can each be vertically displaceable in displaceable along the cross member 10 guides 11.

Also, the clamping devices 7 may be rotatably mounted on the guides 11 in each case about at least one, preferably parallel to the cross member 10 extending axis. It should be noted at this point that, instead of the embodiments with portals 8 shown in FIG. 1, embodiments without these portals are also possible, wherein the Clamping devices 7 may be arranged, for example, on at least one robot arm.

The laying mold 3 can be mounted rotatably on the film laying device 1 about a vertical axis. Furthermore, the film-laying device 1 can be a holder 12 for a storage roll

13 of the material and at least one cutting device for cutting the material have. The holder 12 is indicated in Fig. 1 by a transverse axis extending through the storage roller 13 axis of rotation. Furthermore, a pressing device 14 is provided, which is designed to press the web 5 received between the clamping devices 7 against the laying mold 3 or the scrim 4. At the pressing device 14, a contact surface 15 is formed, which rests against the web 5 during pressing. Furthermore, a handling device 16 is provided, by means of which the pressing device

14 can be moved relative to the laying mold 3. In particular, it can be provided that the handling device 16 comprises an articulated-arm robot, on which the pressing device 14 is accommodated. In the method for producing the workpiece 2, in a step i) the web 5 of the material is cut to size. The material can be withdrawn, for example, from the storage roll 13 and cut by means of the cutting device.

The web 5 is detected in a step ii) by means of the clamping devices 7, and positioned over the laying mold 3.

In a step iii), the web 5 is pressed by means of the pressing device 14 against the laying mold 3 or the scrim 4 located in it. By moving the pressing device 14, the web 5 is adapted in its longitudinal extension to the contour of the laying mold 3, in this case the web 5 is tensioned by means of the clamping devices 7. The deposition of the web 5 can be computer-controlled and monitored with a camera, for example, with regard to crevices or folds. After the web 5 has been deposited, the clamping devices 7 can travel back into a receiving position and pick up a new web 5.

For the production of the workpiece 2, several layers of the webs 5 are stored to a clutch 4 on top of each other, with an orientation of the webs 5 can change to each other. Thus, the webs 5 can be stored, for example, obliquely or transversely to each other. The webs 5 are preferably fiber composite mats, in particular unidirectional fiber composite mats - ie mats with substantially parallel fibers embedded in a matrix, for example of resin, adhesive or a thermoplastic material.

It should also be mentioned at this point that it is advantageous if pressing of the web 5 onto the laying mold 3 begins in a middle region of the laying mold 3 or the highest point of the laying mold 3, since in this way a higher level of accuracy can be achieved ,

The laying mold 3 can be rotated before depositing the web 5 in a desired position or aligned with respect to the web 5. In addition, the laying mold 3 and / or the pressing device 14 may be heated in order to facilitate or permit bonding or laminating of individual layers of webs 5 deposited one above the other.

In Fig. Lb a further and possibly independent embodiment of the film laying device 1 is shown, again with the same parts the same reference numerals or component designations as in the preceding Fig. La are used. In order to avoid unnecessary repetition, reference is made to the detailed description in the preceding FIG.

As can be seen from FIG. 1b, it can be provided that the two clamping devices 7 and also the pressing device 14 are each received on a swivel-arm robot.

By arranging these components on a swivel robot, the flexibility of the foli Enlegevorrichtung 1 can be increased. In particular, can be achieved by the use of Schwenkarmrobotern that the two clamping devices 7 and the pressing device 14 are positioned at a desired angle to the laying form. 2 shows a perspective sectional view of the pressing device 14. As can be seen from FIG. 2, the pressing device 14 comprises a pressing element 17 in the form of a pressing belt 18.

FIG. 3 shows the contact pressure device 14 in a perspective view, wherein the pressure belt 18 is not shown for the sake of clarity. The contour of the Anpressriemens 18 is adapted in this illustration to the contour of the laying mold 3.

The pressing device 14 will be described with reference to a combination of Figures 2 and 3.

An outer side 19 of the Anpressriemens 18 is formed as a contact surface 15. The Anpressriemen 18 is stretched between a plurality of first guide rollers 20 and second guide rollers 21 and received. In particular, it may be provided that in each case one of the first deflection rollers 20 is arranged opposite one of the second deflection rollers 21 and that the two deflection rollers 20, 21 form a deflection roller pair 22.

Furthermore, it is provided that the first deflection rollers 20 are each independently displaceable in the clamping direction 23. As a result, as can be seen from FIG. 3, the individual first deflecting rollers 20 can be adapted to the contour of the receiving side 6 of the laying mold 3 or to the already present nest 4. By moving the individual first guide rollers 20 relative to one another, the contact surface 15 of the pressure belt 18 can thus also be adapted to this contour. For this purpose, it is particularly necessary that the Anpressriemen 18 is formed of a flexible and deformable material. The deflection rollers 20, 21 are in particular components of a carrier element 24 which serves to accommodate the Anpressriemens 18. In particular, it is also necessary that the Anpressriemen 18 is stretchable in the transverse direction, since the chord length of the width of the Anpressriemens 18 is stretched and thus extended when an adjustment of the Anpressriemen 18 to the contour of the form 3. The support member 24 includes a base frame 25 which is provided for coupling with the handling device 16. The base frame 25 can be designed in particular as a screw which is composed of several individual pieces of sheet metal. Alternatively, it can also be provided that the base frame 25 is formed as a welding element. In yet another alternative variant can also be provided that the base frame 25 is integrally formed from a cast part.

Furthermore, the carrier element 24 comprises a holding element 26 for the first deflection roller 20 and a holding element 27 for the second deflection roller 21. The two holding elements 26, 27 comprise in particular a linear guide 28 by means of which the deflection rollers 20, 21 in the clamping direction 23 displaceable on the base frame 25th are arranged. Furthermore, the holding elements 26, 27 each include a fork 29 in which a bolt 30 may be received and by means of bearing bushes 31, the guide rollers 20, 21 may be rotatably mounted.

Furthermore, it can be provided that the individual forks 29 rest against one another in order to be able to apply a transverse force to the pressure belt 18.

The bushings 31 may be formed in particular in the form of plain bearing bushes. In an alternative embodiment, it is also conceivable that 31 bearings are used instead of the bearing bushes.

In yet another embodiment, it is also conceivable that the bearing of the deflection rollers 20, 21 between pin 30 and fork 29 is realized. And that the bolts 30 are rotatably connected to the pulleys 20, 21 and are formed on these. In order to prevent slippage of the Anpressriemens 18 in the axial direction of the guide rollers 20, 21 as possible, it can be provided that the guide rollers 20, 21 have a contoured peripheral surface 32. The contoured peripheral surface 32 may be formed in particular in the form of a V-shaped notch 33. Correspondingly can be provided be that an inner side 34 of the Anpressriemens 18 also has a contouring, which cooperates with the contoured peripheral surface 32 of the guide rollers 20, 21. In particular, it may be provided that the inner side 34 of the Anpressriemens 18 has a plurality of V-ribs, which cooperate with the deflection rollers 20, 21. In other words, it can be provided that the inner side 34 of the Anpressriemens 18 is formed similar to a V-ribbed belt.

Furthermore, it can be provided that the carrier element 24 comprises a pivoting unit 35, by means of which the deflection rollers 20, 21 of a Umlenkrollenpaares 22 are pivotally mounted about a pivot axis 36. The pivoting unit 35 is not shown in detail, however, it is provided that the pivoting unit 35 has a bearing. Furthermore, it can be provided that the pivoting unit 35 has a rotary motor for active pivoting of the two deflection rollers 20, 21 of the deflection roller pair 22. Furthermore, a linear guide 37 may be provided, by means of which the Umlenkrollenpaare 22 can be moved linearly in a direction transverse to the clamping direction 23 transverse direction 38. The linear guide 37 is also not shown in detail.

The pivoting unit 35 or the linear guide 37 can be used in all variants of the pressing device 14, wherein it is possible that one of the two systems is used, or even that both systems are used simultaneously.

As can be seen from FIG. 2, provision can moreover be made for the first holding element 26 to have a first cylinder 39 by means of which the first deflection roller 20 can be actively pressed in the clamping direction 23 in the direction of the laying form 3. In particular, it can be provided here that a piston rod 40 of the first cylinder 39 is coupled to the fork 29 of the first deflection roller 20.

Furthermore, as can be seen from FIG. 2, it can be provided that the fork 29 of the first urge roller 20 and the fork 29 of the second deflection roller 21 are coupled to one another by means of a spacer 41 or are held at a predetermined distance from one another. By means of the spacers 41, the Anpressriemen 18 between the two pulleys 20, 21 are tensioned. In particular, it can be provided that on the spacers 41 a thread adjustment is formed, by means of which the spacers 41 can be extended or shortened. As a result, the tension of the pressure belt 18 can be varied or the assembly and disassembly of the pressure belt 18 in the carrier element 24 can be facilitated.

In order to be able to deposit a web 5 of the film-like material as free of folds as possible in the laying mold 3 or on the scrim 4, it is necessary for the web 5 to be pressed uniformly against the laying mold 3 or the scrim 4. To achieve this uniform pressing, it can be provided, for example, that each of the first cylinder 39 is acted upon by a predetermined pressure, wherein a control valve may be provided per cylinder 39, which is coupled to the central processing unit of the film laying device 1, wherein the control valves Based on the known contour of the form 3 can be controlled.

FIG. 4 shows a further embodiment of the pressing device 14, which is possibly independent of itself, wherein the same reference numerals or component designations are again used for the same parts as in the preceding FIGS. 1 to 3. To avoid unnecessary repetition, reference is made to the detailed description in the preceding figures 1 to 3 or reference. FIG. 4 schematically shows a further possibility for switching the individual cylinders 39 for the first deflection roller 20. As can be seen from FIG. 4, it can be provided that the individual first cylinders 39 are coupled to one another by means of a fluid system 42. By the fluid system 42 can be achieved that the same pressure acts on all of the piston 43 of the first cylinder 39 and thus the same force is applied to the piston rod 40 of the first cylinder 39 with the same piston cross-sectional area in all cylinders 39.

Here, it is conceivable that the fluid system 42 is formed as a closed system and externally no fluid is supplied or removed. In such a system, it may prove useful if, for example, a liquid is used as the fluid which does not volatilize. In particular, of course, a refilling opening connected to the fluid system 42 can be provided, through which a fluid which volatilises over time can be replenished. The operation of such a closed fluid system pressure device 14 functions as follows. In a basic state, the first cylinders 39 are not pressurized and due to the elasticity of the Anpressriemens 18 all first pulleys 20 will be aligned approximately axially to each other. Now, if the pressing device 14 is moved in the pressing direction 44 to the first laying form 3, the Anpressriemen 18 will come to an increase of the laying mold 3 first for concern. By further advancing the pressing device 14 in the pressing direction 44, that first piston rod 40, which is located in the region of this elevation, is pressed against the pressing direction 44 into the first cylinder 39. As a result, the fluid in this first cylinder 39 is displaced and guided into a further first cylinder 39, which is not yet subjected to force, until the pressure belt 18, over its entire width, rests against the laying mold 3 or the clutch 4 ,

If now the pressing device 14 is pressed further in the direction of the pressing direction 44, a uniformly high pressure builds up in all cylinders and thus the pressing force is evenly distributed over the width of the pressing belt 18.

The contact force can be controlled in this case due to a force or moment measurement in the handling device 16. In an alternative variant, it is also conceivable that the handling device 16 is controlled on the basis of the value of the internal pressure in the cylinders 39.

In a further embodiment, it can be provided that the fluid system 42 is coupled to a supply device 45, by means of which the internal pressure in the first cylinder 39 can be actively varied or by means of which a leakage of the fluid can be compensated. Such a provision device 45 may, for example, a

Be a compressor. This may be necessary in particular when using cylinders 39 in the form of pneumatic cylinders 46. Regardless of the described embodiments of the fluid system 42 may be provided that in the spacer 41, a spring element 47 is arranged, which holds the first guide roller 20 and the second guide roller 21 spaced from each other. As can be seen from FIG. 4, it can be provided that the spacers 41, similar to FIG. 2, are arranged in a plane offset from the first piston rod 40. Such an embodiment is shown on the left pair of rollers.

In a further embodiment, it can also be provided that the spacers 41 are arranged directly opposite the first piston rod 40, as shown in the right-hand embodiment of the cylinder.

FIG. 5 shows a further embodiment of the pressing device 14, which is possibly independent of itself, wherein the same reference numerals or component designations are used again for the same parts as in the preceding FIGS. 1 to 4.

In order to avoid unnecessary repetition, reference is made to the detailed description in the preceding figures 1 to 4 or reference.

As can be seen from FIG. 5, it can be provided that the outer first cylinders 39 have a piston 43 with a larger piston cross-sectional area than the inner cylinders, and thus a different contact force acting on the piston rod 40 can be achieved with the same pressure distribution. As a result, it can be achieved, for example, that the edge region of the pressure belt 18 is pressed more strongly against the laying mold 3 or the scrim 4.

Analogously, it is of course also conceivable that, for example, the middle cylinder 39 have a larger piston cross-sectional area.

FIGS. 6a and 6b show further and, if appropriate, separate embodiments of the pressing device 14, with the same reference numerals and component designations being used again for the same parts as in the preceding FIGS. 1 to 5. In order to avoid unnecessary repetition, reference is made to the detailed description in the preceding figures 1 to 5 or reference. According to the schematic illustration in FIG. 6 a, it can be provided that both the first piston 43 and the second piston 50, which are each coupled to a piston rod 40, 49, are arranged in the housing of the cylinder. If a pressure is applied between the two pistons 43, 50, the pressure belt 18 is tensioned.

When a pressure is applied above the second piston 50, the complete deflection roller pair 22 is pressed down.

According to the schematic representation in FIG. 6b, it can be provided that the second deflection rollers 21 are each arranged on a second cylinder 48, which likewise has a piston rod 49 and a separate piston 50. The individual second cylinders 48 can likewise be coupled to one another via a fluid system 42, the second cylinders 48 serving to tension the pressure belt 18. FIG. 7 shows a further embodiment of the pressing device 14, which is possibly independent of itself, wherein the same reference numerals or component designations are used again for the same parts as in the preceding FIGS. 1 to 6. To avoid unnecessary repetition, reference is made to the detailed description in the preceding figures 1 to 6 or reference.

As can be seen from FIG. 7, provision can be made for a drive device 51, which can serve for the active drive of the pressure belt 18, to be coupled to one of the deflection rollers 20, 21 or to a plurality of the deflection rollers 20, 21. It can be achieved by the drive device 51 that the pressure belt 18 is not pulled along due to the movement of the Anpressvor- direction 14 and thereby rotated, but that the Anpressriemen 18 also applies no traction on the web 5 during the movement.

Regardless, as shown in Fig. 7, be provided that the individual pulleys 20 are not pressed by a cylinder in the pressing direction 44, but that this function is realized by means of pressure springs 52. Such an embodiment has the advantage that it is simple and therefore inexpensive to manufacture and is low maintenance intensive in operation. In Fig. 8 is shown schematically why it may be necessary that the web 5 is stretched with respect to the width 53 thereof. If the web 5 is deposited on a flat surface, then the width 53 of the web 5 also corresponds to the extended length of the storage curve. However, if the surface has a curvature, then the length of the lay-up curve is greater than the width 53 of the web 5. If the web 5 were not stretched with respect to its width, then the individual webs would not be rectilinear when seen from above. but depending on the contour of the laying mold 3, gaps would result between the individual webs. In the plan view in Fig. 10 and in the associated section of Fig. 9, a possible embodiment of a stretching device 54 is shown. As can be seen from the two figures, it can be provided that the stretching device 54 comprises a first pair of rollers 55 and a second pair of rollers 56. The two roller pairs each have an upper roller 57, 59 and a lower roller 58, 60, which are arranged parallel to one another and between which the web 5 is clamped on a lateral surface. In particular, it can be provided that the upper roller 57, 59 relative to the lower roller 58, 60 of a pair of rollers 55, 56 is slidable to solve the clamping or to increase the clamping action.

By a variably adjustable arrangement angle 61, the achievable stretch can be adjusted. In particular, it can be provided that a drive device is formed, by means of which the arrangement angle 61 of the first roller pair 55 and the second roller pair 56 can be actively set.

In a further development it can be provided that a detection means 62 is provided, by means of which the actual width of the web 5 can be detected. Thus, the arrangement angle 61 can be actively adapted to the particular situation.

When the pressing device 14 together with the stretching device 54 is moved in the rolling direction 63, the web 5 is stretched with respect to its width to a predetermined value which can be achieved by the arrangement angle 61.

Furthermore, it can also be provided that the upper roller 57, 59 and / or the lower roller 58, 60 of the roller pairs 55, 56 has a rotary drive. In the plan view in FIG. 11 and in the associated section according to FIG. 12, a further possible embodiment of a stretching device 54 is shown. As can be seen from FIGS. 11 and 12, it can be provided that the upper rollers 57, 59 and the lower rollers 58, 60 of the roller pairs 55, 56 are not arranged parallel to one another, but that the upper rollers 57, 59 and the upper rollers 57, 59 and lower roller 58, 60 are both tilted to the web 5 and the front side of the web 5 rest. In particular, it may be provided that the upper roller 57, 59 and the lower roller 58, 60 are arranged closest to each other at their foremost point in the rolling direction.

In such an embodiment, the stretching of the web 5 can be achieved by the rotational movement of the roller pairs 55, 56 similar to a street sweeper.

In particular, it can be provided in such an embodiment variant that the roller pairs 55, 56 have a brush-like end face.

Fig. 13 shows a possible embodiment of a stretching device 54 which is designed to stretch the web 5 segmentally over its width seen across its width. This may be necessary if, for example, one half of the web 5 has to be laid over a contour mound. In this case, this half must have a greater total length. In order to obtain no folds at the end of the laying process of the web 5, it may be necessary that the half, which is laid on the contour hill, is pre-stretched and the pre-stretched length serves as a buffer. The pre-stretching can be achieved in that individual stretching rollers 64 are arranged in front of the pressing device 14 and serve as deflection rollers. The stretch rollers 64 may be individually displaceable in order to increase the Umlenkweg and thus to achieve a stretching effect. By reversing the displacement of individual rollers, the buffered length can be released again.

The exemplary embodiments show possible embodiments, wherein it should be noted at this point that the invention is not limited to the specifically illustrated embodiments of the invention. ben is limited, but rather also various combinations of the individual variants are possible with each other and this possibility of variation due to the doctrine of technical action by representational invention in the skill of those working in this technical field is the expert.

The scope of protection is determined by the claims. However, the description and drawings are to be considered to interpret the claims. Individual features or combinations of features from the illustrated and described different embodiments may represent for themselves inventive solutions. The task underlying the independent inventive solutions can be taken from the description.

All information on ranges of values in objective description should be understood to include these arbitrary and all sub-ranges thereof, eg the indication 1 to 10 should be understood to encompass all sub-ranges, starting from the lower limit 1 and the upper limit 10 ie all subregions begin with a lower limit of 1 or greater and end at an upper limit of 10 or less, eg 1 to 1.7, or 3.2 to 8, 1, or 5.5 to 10. For the sake of order Finally, it should be noted that for better understanding of the structure, elements have been shown partially uneven and / or enlarged and / or scaled down.

S u b e c u s e c tio n a tio n s

Foil laying device 29 Fork

Workpiece 30 bolts

Laying form 31 bearing bush

Clutch 32 peripheral surface

Track 33 cut

Shooting side 34 inside

Clamping device 35 Swivel unit

Portal 36 pivot axis

Side member portal 37 Linear guide

Cross member portal 38 transverse direction

Guide cross member 39 first cylinder first pulley

Holder storage roller 40 piston rod first cylinder

Storage roll 41 Spacer

Pressing device 42 Fluidsy system

Contact surface 43 pistons first cylinder

Handling device 44 pressing direction

Pressing element 45 B provisioning precaution

Pressure belt 46 Pneumatic cylinder

Outside 47 spring element

first pulley 48 second cylinder second deflection second pulley roll

Pulley pair 49 Piston rod second cylinder

Clamping direction 50 pistons second cylinder

Carrier element 51 Antri eb svorri ment

Basic frame Carrier element 52 Pressure springs

first retaining element first deflection53 width web

roll 54 stretching device

second holding element second Um55 first pair of rollers

Castor 56 second pair of rollers

Linear guide holding element 57 upper roller first pair of rollers lower roller first roller pair upper roller second roller pair lower roller second roller pair arrangement angle

detection means

rolling direction

A draw roller

Claims

Patent claims

1. pressing device (14) for a film laying device (1), the pressing device (14) comprising:

- An Anpressriemen (18) with a on an outer side (19) of the Anpressriemens (18) formed contact surface (15), which is designed for pressing a web (5) of a sheet-like material on a laying mold (3) or a scrim (4) ;

- A support member (24) on which the Anpressriemen (18) is accommodated, wherein the carrier element (24) for receiving on the film laying device (1) is formed, characterized in that

the carrier element (24) has at least two first deflection rollers (20) and at least two second deflection rollers (21), between which the pressure belt (18) is tensioned, wherein at least one of the first deflection rollers (20) arranged one of the second deflection rollers (21) opposite one another is and the deflection rollers (20) form a deflection roller pair (22) and wherein the at least two Umlenkrollenpaare (22) relative to each other in a clamping direction (23) are displaceable.

2. Contact pressure device according to claim 1, characterized in that the first deflection rollers (20) are each coupled to a clamping direction (23) acting cylinder (39) pelt.

3. contact pressure device according to claim 2, characterized in that the cylinders (39) by means of a fluid system (42) are coupled together, wherein upon pressing the two first guide rollers (20) on an uneven surface, the two first guide rollers (20) due to the coupling through the fluid system (42) are freely displaceable to each other, wherein in all with the fluid system (42) coupled to the cylinders (39), the same internal pressure prevails.

4. contact pressure device according to claim 2 or 3, characterized in that the fluid system (42) with an external supply device (45) is coupled, by means of which the internal pressure in the fluid system (42) is actively adjustable.

5. Pressing device according to one of claims 2 to 4, characterized in that the individual cylinders (39) in the form of pneumatic cylinders (46) are formed.

6. Pressing device according to one of the preceding claims, characterized in that in each case the second deflection roller (21) by means of a spring element (47) is biased relative to the first guide roller (20).

7. pressing device according to one of claims 1 to 5, characterized in that the second deflection rollers (21) in each case with a in the clamping direction (23) acting Cylinder (48) are coupled.

8. contact pressure device according to one of the preceding claims, characterized in that at least one of the deflection rollers (20, 21) with a drive device (51) is coupled.

9. pressing device according to one of the preceding claims, characterized in that the deflection rollers (20, 21) have a contoured peripheral surface (32), in particular a V-shaped notch (33), and the Anpressriemen (18) on the inside (34) having a corresponding contouring.

10. contact pressure device according to one of the preceding claims, characterized in that in each case the first deflection roller (20) and the opposite second deflection roller (21) of Umlenkrollenpaares (22) are arranged on a common pivot unit (35), so that the individual Umlenkrollenpaare (22) are pivotable relative to each other.

11. contact pressure device according to one of the preceding claims, characterized in that in each case the first deflection roller (20) and the opposite second deflection roller (21) of Umlenkrollenpaares (22) on a common linear guide (37) are arranged, so that the individual Umlenkrollenpaare (22) relative to each other transversely to the clamping direction (23) are displaceable.

12. Pressing device according to one of the preceding claims, characterized in that the Anpressriemen (18) is formed of a flexible material, wherein the Outside (19) of the Anpressriemens (18) seen in the original state over the width of the Anpressriemens (18) forms a straight line and the Anpressriemen (18) is deformable such that the outer side (19) of the Anpressriemens (18) over the width of the Anpressriemens ( 18) can take a contoured shape seen.

13. Pressing device according to one of the preceding claims, characterized in that the Anpressriemen (18) on the outer side (19) has a structuring.

14. Film-laying device (1) for producing a fiber composite material, the film laying device (1) comprising:

- A laying mold (3) for receiving a Geleges (4);

- A pressing device (14) for pressing a web (5) of a sheet-like material on a laying mold (3) or a scrim (4);

a handling device (16) for displacing the pressing device (14) relative to the laying mold (3),

characterized in that

the pressing device (14) is designed according to one of the preceding claims.

15. Foil laying apparatus according to claim 14, characterized in that the contact pressure device (14) is received on the handling device (16).

16. Film laying apparatus according to claim 14 or 15, characterized in that two clamping devices (7), in particular grippers, are formed, which serve for tensioning the web (5) of the film-shaped material, wherein the pressing device (14) between the two clamping devices (7 ) is arranged.

17. Film-laying device according to one of claims 14 to 16, characterized in that in the rolling direction (63) seen in front of the pressing device (14) a stretching device (54) for stretching the web (5) is formed in the longitudinal direction and / or in the transverse direction.

18. A method for producing a workpiece from a film-shaped material, in particular using a film laying device (1) according to one of claims 14 to 17, characterized in that in a step i) a web (5) of the film-shaped material is cut to size and this web (5) in a step ii) by means of two clamping devices (7), received and positioned over a laying mold (3), wherein in a step iii) the web (5) by means of a contact surface (15) of a pressing device (14) after a of the claims 1 to 13 against the laying mold (3) is pressed and by moving the pressing device (14) the web (5) is rolled into the laying mold (3), wherein the contact surface (15) of the pressing device (14) flexible to the Contour of the form (3) adapts, wherein during step iii) the web (5) by means of the clamping devices (7) is tensioned.

19. The method according to claim 18, characterized in that the outer side (19) of the Anpressriemens (18) during pressing on the contoured surface of the Le- shaped (3) in the transverse direction expands and that while the web (5) of the film-shaped material adheres to the outer side (19) of the Anpressriemens (18) and is also stretched in the transverse direction.

20. The method according to claim 18 or 19, characterized in that when moving the pressing device (14) in the rolling direction (63), the web (5) by means of a stretching device (54) is stretched in the longitudinal direction and / or in the transverse direction.