DE102016213353A1 - Device and method for manufacturing a fiber-reinforced extruded profile - Google Patents

Abstract

The invention relates to a device for producing a fiber-reinforced extruded profile comprising a pulling device (10) for drawing a strand-like workpiece (9) through the device, at least one fiber coil (1) which is rotatable about the strand axis and has a coil core around which a fiber ( 5), wherein the fiber (5) is intended to be deposited on the surface of the workpiece (9), at least one guide device (7) rotatably arranged about the strand axis, which guides the fiber unwound from the fiber bobbin (1). 5) on the workpiece (9), wherein the bobbin of the fiber bobbin (1) has a through hole through which the workpiece (9) is guided, and a drinking device (22), the means for wetting the fibers (5) with a Impregnating agent. Furthermore, the invention relates to a strand winding system comprising a plurality of said devices, and a method for producing fiber-reinforced extruded profiles in such a device.

Description

The invention relates to a device for manufacturing a fiber-reinforced extruded profile comprising a pulling device for pulling a strand-like workpiece through the device, at least one fiber coil rotatably disposed about the strand axis, having a coil core around which a fiber is wound, the fiber thereto is provided to be deposited on the surface of the workpiece, and at least one guide means rotatably disposed about the strand axis, which directs the fiber unwound from the fiber bobbin to the workpiece. Furthermore, the invention relates to a strand winding system comprising a plurality of said devices, and a method for producing fiber-reinforced extruded profiles in such a device.

Fiber-reinforced materials (fiber composites) contain as essential components fibers as reinforcing material and a matrix system in which the fibers are embedded. Typically, the fibers are based on glass, carbon, aramid or nylon. Thermosetting polymers, for example polyester resins, vinyl ester resins or epoxy resins, or thermoplastic polymers such as polyamides, polypropylenes or polyethylenes are mostly used as matrix systems.

Various processes are known for the production of fiber-reinforced extruded profiles. In the typical pultrusion process, the fibers are unwound from bobbins, soaked in the matrix system or otherwise wetted, formed into the desired profile shape and cured. The fibers themselves may form the profile shape or they may be applied to a base body. The process is usually carried out continuously by continuously drawing the workpiece formed by the impregnated fibers through the plant.

In the so-called filament winding process, the fibers are also unwound from bobbins and impregnated with the matrix system or otherwise wetted. However, this is a discontinuous process in which a core or body to be coated rotates and the fibers are guided by an axial reciprocating motion on the workpiece and wound on this until the desired thickness of the fiber-plastic layer is reached.

The pull-winding process is a combination of pultrusion and filament winding. A strand-shaped workpiece is pulled through the plant while fiber coils rotate about the workpiece, the fibers are soaked or wetted, and the wetted fibers are deposited on the workpiece. The wetting can take place only on the workpiece. The strand-shaped workpiece may be a preformed body, for example a tube, but it may also be formed by fibers which in a first stage are e.g. be brought into a profile shape in the pultrusion or Pullwindingverfahren.

Depending on the extrusion profile to be produced, the pull-winding process is particularly economical since it combines the continuous production of pultrusion with the flexibility of filament winding, in particular with regard to the number and orientation of the individual layers of fibers. A disadvantage of this method, however, is that arise by the rotation of the fiber coils, which are usually mounted on carousel-like structures, high centrifugal forces during operation. This leads to high mechanical loads and wear of the system as well as safety problems with regard to the protection of the system operator from possibly loosening coils. In practice, this problem is addressed by limiting the rotational speed of the carousel or the number and size of fiber spools on the carousel. Both measures mean a restriction on the production capacity of the system.

It was the object of developing known systems and methods for the production of fiber-reinforced extruded profiles to the effect that the conceptual manufacturing capacity is increased, without having to compromise in terms of plant safety.

This object is achieved by a device for manufacturing a fiber-reinforced extruded profile according to claim 1, a strand winding system according to claim 9 and a method for producing fiber-reinforced extruded profiles according to claim 12. Advantageous embodiments are set forth in claims 2 to 8, 10 and 11.

The inventive apparatus for manufacturing a fiber-reinforced extruded profile comprises a drawing device for drawing a strand-like workpiece through the device, at least one fiber coil rotatable about the strand axis and having a coil core around which a fiber is wound, the fiber being provided on the fiber core Surface of the workpiece to be stored, and at least one rotatable about the strand axis guide means arranged, which directs the unwound from the fiber spool fiber to the workpiece. According to the invention, the spool core of the fiber spool has a through-hole through which the workpiece is guided, and the device has a watering device which has means for wetting the fibers with an impregnating agent.

As "extruded profile" is here and below the finished wrapped workpiece referred to, while the term "workpiece" is used in all stages of the passage of the device according to the invention. The workpiece can be pre-cut to a certain length, but it can also be supplied as a tubular fabric in an initially indefinite length of the device. The cross-sectional profile of the workpiece may be constant or variable over its length. The cross-sectional profile is limited only in that its greatest extent must be smaller than the cross section of the through hole of the coil core of the fiber coil. The workpiece can be hollow or compact. As described above for the pull-winding method, this may be a preformed main body or a structure of fibers which have been shaped into a tread shape in a first stage.

The strand axis is the axis that results from the workpiece being pulled through the device. Preferably, the workpiece is not deflected within the device, so that only one defined strand axis results per device.

Drawing devices are known from the prior art, for example, caterpillars, step grippers, straight draw machines, pulleys or reel drawers.

According to the invention, the device comprises at least one fiber coil, which has a coil core around which a fiber is wound. The spool core has a through hole through which the workpiece is guided. To unwind the fiber during operation, the fiber spool rotates around the workpiece. Compared to the prior art of the pull-winding method in which the fiber bobbin is mounted on a carousel-like structure which in turn rotates around the workpiece, the centrifugal forces and the moment of inertia of the fiber bobbin with respect to the strand axis are structurally apparent in the device according to the invention reduced.

According to the invention, the device has a drinking device. The drinking device has means for wetting the fibers with an impregnating agent. Under an impregnating agent is basically any substance to understand that causes a consolidation of the fibers. As impregnating agent, in particular a liquid is used in the context of the present invention. Alternatively, the impregnating agent may be a matrix liquid, such as a reactive liquid thermoset system based on, for example, polyester, vinyl ester, epoxy resin, or a reactive thermoplastic system based on caprolactam, polyacrylic, or a thermoplastic melt, for example based on Polypropylene, polyethylene, polyamide.

When referring in the following to properties of the fiber coils (in the plural), this also means properties of the at least one fiber coil.

The fiber spools can be designed differently, for example, in terms of their dimensions and the capacity of fiber which is wound on the spool. In a preferred variant of the device according to the invention narrow fiber coils are used, in which the ratio of the maximum outer diameter to the axial width of the fiber coil is greater than two.

Preferably, the through hole is arranged centrally in the spool core.

The arrangement of the fiber coils according to the invention about the strand axis allows a modular and expandable structure with regard to the number of fiber coils. In a preferred embodiment of the device, at least two fiber spools with through-holes are arranged one behind the other along the strand axis, and there is a deflection device, via which the fibers unwound from the respective fiber spools are guided to the guide device.

In a further preferred embodiment of the device according to the invention, at least one fiber spool or a plurality of fiber spools are arranged on a drivable hollow shaft, and the workpiece is guided through the hollow shaft. In the case of multiple fiber coils, the hollow shaft serves as a common storage of the fiber coils. The deflection device can be designed so that the unwound from the respective fiber coils fibers are guided inside or outside the hollow shaft to the guide device.

Preferably, the individual fiber coils are movably mounted relative to the hollow shaft. This allows different angular speeds of the fiber coils depending on the diameter of the remaining fiber winding.

In another preferred embodiment, the hollow shaft is rigidly mounted, and the fiber coils and the guide means are mounted for driving on the hollow shaft.

Preferably located within the hollow shaft is a protective tube through which the workpiece is guided. The protective tube shields the workpiece from the rotating parts of the device and thereby prevents possible damage to the workpiece. Particularly advantageous is an arrangement in which the protective tube is rigidly fixed at one end, so that it can not perform any rotational movement itself. The use of a protective tube is equally advantageous both in a device with a hollow shaft and in a device without a hollow shaft.

According to the invention, the device comprises a guide device rotatably arranged about the strand axis, which guides the fiber unwound from the fiber bobbin onto the workpiece. In the case of a plurality of fibers coming from the fiber spool or the fiber spools, the guide device preferably directs all the fibers onto the workpiece. The guide device serves to deposit the fibers at a predetermined angle on the workpiece. This angle is dependent on several parameters, primarily the relationship between the speed at which the workpiece is pulled through the device, the angular velocity at which the guide rotates about the strand axis and the winding radius as the distance between the already deposited fiber and the axis of rotation.

The guide device can be designed differently and can comprise a plurality of individual components.

In an advantageous embodiment, the guide device comprises a ring over which the fibers are guided. The fibers can be guided loose over the ring. The ring may have in its lateral surface and / or its end face bores through which the fibers are guided. This embodiment is preferred for some applications because, compared to the loose guide, the fibers are fixed at certain exit points distributed over the circumference of the ring.

In a further advantageous embodiment, the guide device comprises at least two rings whose outer diameters are different. The rings can be arranged one inside the other or one behind the other. The fibers are guided in such a way over the at least two rings that due to the friction, a fiber tension sets, which is conducive to a defined deposition of the fibers on the workpiece and a high fiber volume fraction.

In a preferred embodiment, the guide device is firmly connected to the hollow shaft, so that the angular velocity of the guide device corresponds to that of the hollow shaft.

In a further preferred embodiment of the device according to the invention, at least one further fiber coil is arranged in the radial direction behind another fiber coil and rotatable relative thereto. This radial series connection of fiber coils makes it possible to increase the number of available fibers per axial length section. Preferably, all such fiber coils connected in series are arranged concentrically to the strand axis.

In a further development of this arrangement, at least one further guide device is preferably arranged so as to be rotatable about the rod axis, which deflects the fiber unwound from the further fiber bobbin onto the workpiece. The further guide device can be operated synchronously with the first guide device. Alternatively, the further guide device can also be operated asynchronously to the first guide device, both with regard to the angular velocity and the direction of rotation. As a result, a large number of patterns of depositing the fibers on the workpiece can be realized in one operation.

In an advantageous embodiment, the watering device is rotatably disposed about the strand axis between the at least one fiber spool and the guide device and has the means for guiding the fibers through the watering device.

Wetting devices for wetting fibers are known from the classic pull-winding method, for example by dripping or spraying the fibers or by wetting the dry fibers by applying them to an already soaked workpiece.

In a preferred embodiment of the invention, the watering device comprises at least one component rotating about the strand axis and at least one stationaryly arranged component. Alternatively, the watering device may have at least one component rotating about the strand axis, an inner component with respect to the yarn, and at least one further component rotating in common with the rotating component with respect to the yarn. Particularly preferably, this watering device has a form in the interior, in which an impregnating agent film can form, so that a defined wetting of the fibers can be ensured. Examples of such advantageous embodiments are in 9 and 10 played.

Alternatively, the watering device can be arranged in the pulling direction of the workpiece before or upstream of a depositing point of the fiber on the surface of the workpiece. As a result, the workpiece can be wetted with the impregnating agent, such as a liquid, for example, and the fiber can be deposited on the already wetted workpiece. The fiber is soaked from the inside through the wet workpiece. The point of deposition of the fiber on the surface of the workpiece is to be understood as the point on the surface of the workpiece the fiber is deposited on the workpiece. The workpiece is moved in the axial direction relative to the other components. Seen from the outside, the storage point is therefore stationary with respect to the axial position.

Alternatively, the watering device can be arranged in the drawing direction of the workpiece, as seen after or downstream of the guide device. As a result, the already deposited on the workpiece fiber can be wetted. The fiber is soaked from the outside. Such an arrangement prevents carry-over of the impregnating agent in the guide device.

Another object of the invention is a strand winding system, in which at least two devices according to the invention are arranged modularly one behind the other, so that an emerging from the first device strand-shaped workpiece is passed through the second device. It is not necessary for each device to include its own pulling device. However, the strand winding plant as a whole has at least one drawing device for drawing a strand-shaped workpiece.

Depending on the requirements of the finished extruded profile, it is necessary to apply different types of fibers or fiber thicknesses in different orientation and layer thickness on the workpiece to be wrapped. Optionally, the use of various impregnants is required. The modular design of the strand winding system according to the invention makes it possible to meet these requirements and produce a variety of different extruded profiles with a few devices.

In a preferred embodiment of the strand winding system, successive devices are set up such that the direction of rotation of the respective guide devices and / or the relationship between the angular velocity and the axial velocity of the workpiece are different.

In a further preferred embodiment of the strand winding system, at least one deflection device is arranged between two devices according to the invention, which deflects the workpiece emerging from the first device so that the strand axis of the second device is not parallel to the strand axis of the first device. As a result, a flexible arrangement of the individual devices and optimal utilization of the available space is possible.

In an advantageous development of the invention, the device is accommodated as a module in a housing, for example in a frame construction. This allows a space-saving arrangement of several device modules next to each other or one above the other in the form of a stackable modular system.

Another object of the invention is a method for producing a fiber-reinforced extruded profile, in which a strand-like workpiece is pulled by a pulling device through a device, at least one fiber from the coil core at least one rotatable about the strand axis arranged fiber coil is unwound and coming from the fiber coil over at least a guide means rotatably arranged about the string axis is directed onto the workpiece and deposited on the workpiece, wherein the workpiece is guided through a throughbore in the spool core of the at least one fiber spool and the fiber is wetted by means of a watering means with an impregnating agent, in particular a liquid.

Typically, a fiber-reinforced extruded profile comprises a plurality of layers of fibers. The production of such extruded profiles can be accomplished with the method according to the invention in several ways.

In a preferred embodiment of the method, the workpiece to be wrapped is pulled through a plurality of devices connected in series, wherein at least one layer of fibers is applied in each device. This process is referred to as "continuous" and is particularly suitable for so-called "endless", which is cut to a defined extent only as a finished extruded profile.

In a further preferred embodiment of the method, a workpiece limited in advance to a certain length is pulled several times through one or more devices in order to apply the plurality of layers of fibers. This process is referred to as "discontinuous".

In a particularly preferred embodiment of the discontinuous method, at least two drawing devices are provided in order to be able to change the direction in which the workpiece is drawn as quickly as possible. Furthermore, the guide device is designed such that the fibers coming from the at least one fiber coil can be deposited on the workpiece both in one direction and in the other direction.

In prior art pull-winding machines, the fiber spools are eccentrically positioned with respect to the string axis on a carousel-like structure. The more fiber spools are present and the greater the fiber capacity of the individual fiber spools, the greater are the centrifugal forces that are in operation act on the plant. As mentioned above, this limits the production capacity of known systems. In contrast, in the device according to the invention, the centrifugal forces acting on the fiber coils and the mass moment of inertia of the fiber coils are significantly reduced. As a result, the manufacturing capacity can be increased accordingly and reduce the mass of the system.

Another advantage of the invention is the fact that the danger emanating from the rotating fiber spools according to the prior art is avoided in the device according to the invention, since here no fiber spools can be released from their support during rotation.

Furthermore, the number of coils in the device according to the invention can be adapted to the required conditions with only little conversion effort. The device according to the invention is thus much more flexible adjustable than known Pullwinding systems in which the number of fiber coils is determined due to the design of the carousel.

The invention will be explained in more detail below with reference to the drawings. The drawings are to be understood as schematic representations. They do not represent a limitation of the invention, for example with regard to specific dimensions or design variants.

Show it:

1 a carousel with fiber spools according to the prior art

2 a view and longitudinal section of a carousel according to 1

3 : Examples of arrangements of fiber coils according to the invention

4 : an example of a single fiber bobbin according to the invention

5 : an example of another embodiment of a fiber coil according to the invention

6 : an example of an arrangement according to the invention with four fiber coils

7 : an example of a further arrangement according to the invention with four fiber coils

8th : A simplified schematic representation of an embodiment of a drinking device

9 : Variants of a drinking device

10 : a variant of a drinking device

11 a simplified schematic representation of another embodiment of a drinking device

12 a simplified schematic representation of another embodiment of a drinking device

13 schematically two possible positions of a brake to form or maintain the fiber tension

14 : a comparison of centrifugal forces

15 : a comparison of the moments of inertia

LIST OF REFERENCE NUMBERS

1

 fiber coil

3

 carousel

5

 Fiber / fibers

7

 guide means

9

 workpiece

10

 puller

11

 Fiber supply on the fiber coil

13

 hollow shaft

14

 opening

15

 bearing block

17

 execution

19

 Frame for fiber spools

21

 Deflection pulleys / deflections / deflection device

22

 Tränkeinrichtung

22a

 impregnating agent

23

 Basic body of the drinking device

24

 procedure

25

 supply

27

 Inner body of the drinking device

29

 Tränkrollen

31

 scraper

1 shows a section of a plant for the production of fiber-reinforced extruded profiles by the pull-winding method according to the prior art. In this example, there are ten fiber spools 1 each independently rotatable on the end face of a carousel 3 arranged. The fibers unwound from the coils 5 be about a leadership facility 7 on the workpiece to be wrapped 9 steered, which is guided through a central opening in the carousel. The workpiece 9 is drawn in this illustration from left to right through the plant while the carousel 3 is driven in the illustrated arrow direction. The ratio between the axial velocity of the workpiece and the angular velocity of the carousel multiplied by the workpiece radius determines the Angle under which the fibers are deposited on the workpiece. In 1 not shown are the wetting of the fibers, for example by a watering device, and other components of the system.

In 2 are shown a plan view of the carousel and a longitudinal section, wherein for the sake of clarity, only one fiber coil is shown.

3 shows by way of example two embodiments of the device according to the invention for the production of fiber-reinforced extruded profiles. In both cases, the device comprises a pulling device 10 for pulling a strand-shaped workpiece 9 through the device in the direction indicated by the arrows. The pulling device 10 himself is in 3 indicated only schematically. Furthermore, both embodiments of the device according to the invention in this example each comprise ten fiber coils 1 which are arranged rotatably about the strand axis. The example above shows narrow fiber coils 1 with large diameter, in the example below by wide fiber coils 1 with a small diameter. The fiber coils 1 rotate in the direction indicated by the arrows about the strand axis, wherein the fibers located on the fiber spools 5 be handled. The fibers 5 become to one about the strand axis rotatably arranged guide means 7 led the fibers 5 on the workpiece 9 steers and drops there. In the above in 3 illustrated example includes the guide device 7 two concentric rings over which the fibers 5 coming from the fiber coils first from outside to inside and then redirected to the outside. In the example below, the guide device comprises 7 only one ring. In contrast to the systems known from the prior art, the workpiece to be wrapped becomes 9 through through holes in the coil cores of the fiber coils 1 guided.

In 4 FIG. 3 shows an example of an embodiment of a fiber coil in plan view (left) and in longitudinal section (right). The fiber coil 1 is on a drivable hollow shaft 13 arranged through which the workpiece 9 is guided. Next to the fiber coil 1 with the coil core is a guide device 7 that from the bobbin stock 11 unwound fiber 5 via an opening on the workpiece 9 directs. Here is the bobbin stock 11 relative to the hollow shaft 13 rotatably arranged, for example by means not shown in detail bearings. The management device 7 is contrary to the hollow shaft 13 rotatably connected, so that the guide device 7 at the same speed as the hollow shaft 13 can turn.

In addition to the coils wound on coil cores, coreless coils can also be used on subsequently introduced hollow chip cores as fiber coils.

In the above-described exemplary embodiments of the device according to the invention, the fibers are unwound outwardly from the fiber bobbins, so the fiber bobbins have a so-called external print. However, the invention also includes devices with inner-takeoff fiber spools in which the fiber is unwound inwardly towards the center of the fiber bobbin. In preferred embodiments of this type are on the hollow shaft or around the hollow shaft around clamping elements, such as jaws or tension rollers mounted, which press away from the hollow shaft in the direction of the inside of the fiber coil. This ensures that the fibers remain in the wound state and do not fall to the center in the direction of the hollow shaft. In addition, this achieves a desired fiber tension. With the unwinding of the fibers, the inner diameter of the remaining fiber winding in the coils increases. The clamping elements are designed so that they adapt to the change in diameter and press accordingly further outward. This can for example be achieved in that the clamping elements are supported by means of springs against the hollow shaft. The fiber spools are also rotatably arranged in this embodiment relative to the hollow shaft, preferably in that the clamping elements are supported via a bearing against the hollow shaft, for example a plain bearing, roller or ball bearings. In this embodiment, braking is the hollow shaft 13 only from the inside or along the hollow shaft 13 possible.

In 5 is an example of another embodiment of a fiber coil in plan view (left) and shown in longitudinal section (right). The fiber coil 1 is on a drivable hollow shaft 13 arranged through which the workpiece 9 is guided. Next to the fiber coil 1 with the coil core is a guide device 7 , The management device 7 is cup-shaped or cup-shaped with a lid 8th formed and has accordingly in the sectional view on the right a U-shaped cross-section. In other words, the guide means 7 on one side an opening on the lid 8th is closed. The opening points in the transport direction of the workpiece 9 , The lid 8th again has a hole or a relatively small opening 8a on, through which a fiber 5 can be passed. A reel stock 11 is inside the guide device 7 arranged and located with respect to the strand axis of the workpiece 9 in a radially outer region of the guide device 7 , The from the bobbin stock 11 unwound fiber 5 gets through the opening 8a in the lid 8th guided and thus after deflection by the guide device 7 on the workpiece 9 directed.

In 6 is an example of an arrangement according to the invention with four fiber coils 1 played. A hollow shaft 13 through which the workpiece 9 is pulled in the direction of the arrow, is in a bearing block 15 rotatably mounted. On the hollow shaft 13 is a frame 19 for fiber coils 1 arranged and fixed to the hollow shaft 13 connected. Within the frame 19 are four fiber coils 1 arranged individually relative to the hollow shaft 13 are rotatable. The of the respective located on the fiber spools fiber supplies 11 coming fibers 5 Be outward and then over pulleys 21 guided, fixed to the frame 19 are attached. In the respect to the drawing direction of the workpiece outlet side end face of the hollow shaft bearing are bushings 17 present through which the fibers 5 coming from the fiber spools to - not shown - guide device and are directed over this on the workpiece. In this example, the fibers become 5 by means of the pulleys 21 outside the hollow shaft 13 led to the leadership institution.

In 7 is an example of another arrangement according to the invention with four fiber coils 1 played. A hollow shaft 13 through which the workpiece 9 is pulled in the direction of the arrow, is in a bearing block 15 rotatably mounted. On the hollow shaft 13 are four fiber coils 1 arranged individually relative to the hollow shaft 13 are rotatable. The of the respective located on the fiber spools fiber supplies 11 coming fibers 5 be over pulleys 21 guided, fixed to a frame 19 are attached. In this embodiment of the device according to the invention, the fibers are first obliquely outwardly from the fiber coils 1 unwound, there at the pulleys 21 first, in turn, between two adjacent fiber coils 1 deflected, then on another pulleys 21 in openings 14 the hollow shaft 13 deflected and finally along an inside of the hollow shaft 13 in a gap between the hollow shaft 13 and the workpiece 9 guided. In other words, the fibers become 5 from the pulleys 21 inside the hollow shaft 13 led to the leadership institution. The gap serves as a passage 17 , The implementation 17 extends to that in the drawing direction of the workpiece 9 exit-side end face of the hollow shaft bearing, so that also here by the implementation 17 the fibers 5 from the fiber coils 1 coming to - not shown - guide device and be directed over this on the workpiece. By the arrangement of the frame 19 between each two adjacent fiber coils 1 and the internal deduction of the fibers 5 , this embodiment allows a supply of fibers 5 to the fiber coils 1 from the outside, as indicated by arrows. As a result, this embodiment enables a simultaneous winding and unwinding on different fiber spools 1 or a winding of all fiber coils 1 without dismantling the fiber spools 1 from the hollow shaft 13 , The leadership of the fibers 5 on the inside of the hollow shaft 13 also allows braking of the fiber coils 1 from the outside for a fiber tension, for example by jaw brake or V-belt.

8th shows a simplified schematic representation of an embodiment of a drinking device 22 and how it works. The drinking device 22 is disposed between the fiber spools, not shown, and the guide means. The fibers coming from the fiber coils 5 So they are soaked separately before they are directed over the guide device on the workpiece. The drinking device 22 can be with the leadership device 7 combine or integrate, allowing a laying down of the fibers 5 on the workpiece 9 can be done immediately after soaking. Via a supply line 25 is coming from the outside an impregnant 22a in the drinking facility 22 introduced and wetted by the watering device 22 guided fibers 5 before this on the workpiece 9 be filed.

9 shows three variants of a preferred embodiment of a drinking device 22 the device according to the invention in each case in longitudinal section, as in the embodiment of the 8th can be used. The drinking device 22 is disposed between the fiber spools and guide means, not shown. The fibers coming from the fiber coils 5 So they are soaked before being directed over the guide device on the workpiece. The three variants of the drinking device 22 comprise an outer body 23 as well as an inner body 27 , the opposite of the main body 23 is rotatable.

The inner body is preferred 27 with the hollow shaft 13 connected so that he turns with this. In the right and in the middle illustrated variants is the main body 23 stationary, whereas in the variant shown on the left also the main body 23 is rotatably mounted. In the longitudinal profile, the base body 23 on the front side a smaller inner cross section than in the middle. As indicated schematically in the drawings, the longitudinal profile of the base body 23 the size and shape of the inner body 27 adjusted so that there is a gap between the main body and the inner body. Via a supply line 25 becomes a drinker in all cases 22a in the drinking facility 22 introduced, preferably in the gap between the base body 23 and inner body 27 , In the variant on the left the supply of the impregnating agent 22a over the supply line 25 in the axial direction with respect to the strand axis of the workpiece 9 , In the variant in the middle, the feeding of the impregnating agent takes place 22a over the supply line 25 in the radial direction with respect to the strand axis of the workpiece 9 , In the variant on the right is the supply line 25 in the outer body 23 arranged in the circumferential direction, that a supply of the impregnating agent 22a in the circumferential direction around the inner body 27 he follows. Excessive impregnant 22a can through a process 24 from the drinking facility 22 be dissipated.

The fibers 5 Be about first deflections 21a on the inner body 27 , passed through the gap and on to the guide device. The exit-side deflection can, for example, as in the variant shown on the left by a corresponding shaping of the body 23 take place or as shown in the right and in the middle variant via second deflections 21b , Due to the rotational movement of the inner body 27 forms after supply of the impregnating agent 22a in the gap an impregnant film, preferably the entire surface of the inner body 27 as well as the fibers sliding on it 5 wetted. Because the fibers 5 are guided directly over this lateral surface, take the fibers 5 on her way through the drinking facility 22 impregnating agent 22a on. The inner body 27 The task also takes over the fibers 5 to spread as they are wetted in the gap.

10 shows a further variant of a preferred embodiment of a drinking device 22 The device according to the invention in each case partially sectioned longitudinal view (left) and plan view (right), as in the embodiment of the 8th can be used. Like the drinking facilities 22 according to 9 is also the in 10 illustrated drinking device 22 arranged between the fiber spools, not shown, and guide means. On the hollow shaft 13 through which the workpiece 9 is guided, are showers 29 attached, whose axis of rotation is perpendicular to the strand axis. To the hollow shaft 13 with the weeping wheels 29 around is a fixed body 23 the watering device 22 arranged. In the longitudinal profile, the base body 23 on the front side a smaller inner cross section than in the middle. As can be seen in the longitudinal section (left), the longitudinal profile of the body is 23 the size and shape of the tears 29 adapted, so that between the main body 23 and the weeping rolls 29 gives a gap, which is preferably uniform. In this gap is over an existing in the main body supply line 25 Impregnating agent introduced.

The fibers 5 Be about first deflections 21a on the weeping wheels 29 and from there over second diversions 21b led to the leadership institution. The deflections cause a fiber tension, which in turn causes a rotation of the troughs 29 caused. The weeping rolls 29 therefore need not be driven actively. In the direction of rotation of the tubercles 29 are located at the exit of the gap, between temples 29 and inner surface of the main body 23 is formed, scraper 31 , For wetting the fibers with the impregnating agent 22a this will be via the supply line 25 introduced into the gap. As the temples 29 with the hollow shaft 13 rotate, forming an impregnant film within the gap to the body due to the centrifugal forces 23 , The trough rollers absorb impregnating agent from this film and transport it in the direction of the gap. There the scrapers provide 31 for a uniform occupancy of the tubercles 29 with the impregnant 22a , then onto the fibers passed over the rollers 5 is transmitted.

11 shows a simplified schematic representation of another embodiment of a drinking device 22 and how it works. The drinking device 22 is in the pulling direction of the workpiece 9 in front of the fiber coils 1 and the guide device shown in principle arranged. The of the fiber coils 1 coming fibers 5 So they are soaked, after they on the guide device on the workpiece 9 be steered. The drinking device 22 has a basic body 23 with a supply line 25 for the drinker 22a on. The drinking device 22 settles in the leadership device 7 so integrate that the workpiece 9 with the impregnant 22a is wetted and the dry fibers 5 on the already soaked workpiece 9 be filed. About the supply line 25 is coming from the outside an impregnant 22a in the drinking facility 22 introduced and wetted by the drinking device 22 guided workpiece 9 before depositing the fibers 5 , In other words, the drinking device is located 22 in the pulling direction of the workpiece 9 in front of a storage point of the fiber 5 on the surface of the workpiece 9 , The fibers 5 are soaked after filing from the inside.

12 shows a simplified schematic representation of another embodiment of a drinking device 22 and how it works. The drinking device 22 is after the fiber coils 1 and the guide device shown in principle arranged. The of the fiber coils 1 coming dry fibers 5 So they are soaked, after they on the guide device on the workpiece 9 be steered. The drinking device 22 has a basic body 23 with a supply line 25 for the drinker 22a on. In 12 is just the application of the impregnating agent 22a shown to illustrate the operation. The drinking device 22 can be after the leadership device 7 Integrate that already on the dry workpiece 9 deposited fibers 5 with the impregnant 22a be wetted. About the supply line 25 is coming from the outside an impregnant 22a in the drinking facility 22 introduced and wetted by the drinking device 22 guided workpiece 9 after depositing the fibers 5 , In other words, the drinking device is located 22 in the pulling direction of the workpiece 9 after a storage point of the fiber 5 on the surface of the workpiece 9 , The fibers 5 are soaked after filing from the outside.

13 schematically shows two possible positions of a brake 32 for the formation or maintenance of the fiber tension. The fiber tension can be achieved by deflecting the fibers 5 and the associated friction is generated. In both positions are the fibers 5 shown before on the workpiece 9 through the leadership facility 7 be steered. In the left position, the fiber tension is changed twice by 180 ° at two deflections 21 generated. In the right position, the fiber tension is reversed twice at opposite angles of +45 ° and -45 ° at two deflections 21 generated. The right position creates a low fiber tension and the left position creates a high fiber tension. The fiber tension is continuously variable by axial displacement of the deflections relative to each other. Basically, the fiber tension can also be controlled by braking the fiber coil 1 from the inside on the hollow shaft 13 or externally by means of a gear or belt.

The 14 and 15 illustrate the advantages that have the device of the invention over known pull-winding systems with a carousel of fiber coils. In 14 The centripetal acceleration (normalized to gravitational acceleration) is plotted against the speed for different configurations of fiber coils. The number on the ordinate axis thus corresponds to the respective multiple of the acceleration due to gravity. In known pull-winding systems, the centrifugal force increases sharply with increasing number of fiber coils and with increasing speed. This is due to the fact that the fiber coils are arranged eccentrically on the carousels with respect to the strand axis, and the Zentripetalbeschleunigung significantly depends on the distance of the mass points to the axis of rotation.

The values shown are for the following configuration: Standard glass fiber spools with a coil outer diameter of 30 cm are arranged evenly and as narrowly as possible on a circular path on a carousel, in the graphically indicated number of 1, 2, 4, 6 and 8 fiber coils. Because of this arrangement, a radius R of this circular path is obtained which, in conjunction with the rotation frequency (number of revolutions) n, determines the centripetal acceleration according to the following formula: a _zp = 4 · π ² · n ² · R

Normalized to the gravitational acceleration, for example, for an arrangement with six fiber coils (second curve from above) at a rotation frequency of 4 revolutions per second results in an approximately 19-fold acceleration of gravity.

In contrast, in a device according to the invention, the centripetal acceleration is equal to zero, irrespective of the number of fiber coils arranged coaxially behind one another.

15 shows a comparison of the mass moment of inertia, which set at a rotation of the fiber coils around the strand axis. The hatched blocks represent the values for the device according to the invention, the gray blocks the values for carousel devices known from the prior art, each with the same number of fiber coils. The numerical values given on the ordinate axis refer to arrangements with fiber coils having a coil outer diameter of 30 cm and a mass of 30 kg per fiber coil. The higher the number of fiber coils and thus the manufacturing capacity of the system, the more obvious is the advantage of the device according to the invention. As a consequence, the new system can be accelerated and braked better than a conventional system.

Claims (15)

Device for producing a fiber-reinforced extruded profile comprising a pulling device ( 10 ) for pulling a strand-shaped workpiece ( 9 ) by the device, at least one fiber coil rotatably arranged about the strand axis ( 1 ), which has a coil core around which a fiber ( 5 ), wherein the fiber ( 5 ) is provided on the surface of the workpiece ( 9 ), at least one guide device rotatably arranged about the strand axis ( 7 ), that of the fiber coil ( 1 ) unwound fiber ( 5 ) on the workpiece ( 9 ), wherein the coil core of the fiber coil ( 1 ) has a through hole through which the workpiece ( 9 ), and a drinking device ( 22 ), the means for wetting the fibers ( 5 ) with an impregnating agent ( 22a ), in particular a liquid. Device according to claim 1, wherein at least two fiber coils ( 1 ) are arranged with through holes along the strand axis one behind the other, and wherein a deflection device ( 21 ) is present, over which the of the respective fiber coils ( 1 ) unwound fibers ( 5 ) to the management body ( 7 ) are guided. Device according to claim 1 or 2, wherein the at least one fiber coil ( 1 ) or several fiber coils ( 1 ) on a drivable hollow shaft ( 13 ) are arranged, and the workpiece ( 9 ) through the hollow shaft ( 13 ) is guided. Apparatus according to claim 3, wherein the deflection device ( 21 ) formed by the respective fiber coils ( 1 ) unwound fibers ( 5 ) within the hollow shaft ( 13 ) to the management body ( 7 ) respectively. Apparatus according to claim 3, wherein the deflection device ( 21 ) formed by the respective fiber coils ( 1 ) unwound fibers ( 5 ) outside the hollow shaft ( 13 ) to the management body ( 7 ) respectively. Device according to one of claims 3 to 5, wherein within the hollow shaft ( 13 ) is a protective tube through which the workpiece ( 9 ) is guided. Device according to one of claims 3 to 6, wherein the guide device ( 7 ) fixed to the hollow shaft ( 13 ) is connected, so that upon rotation of the hollow shaft ( 13 ) the angular velocity of the guide device ( 7 ) of the hollow shaft ( 13 ) corresponds. Device according to one of claims 1 to 7, wherein the drinking device ( 22 ) between the at least one fiber coil ( 1 ) and the management body ( 7 ) is arranged rotatably about the strand axis and has means for guiding the fibers through the drinking device. Device according to one of claims 1 to 7, wherein the drinking device ( 22 ) in the drawing direction of the workpiece ( 9 ) in front of a depositing point of the fiber ( 5 ) on the surface of the workpiece ( 9 ) is arranged. Device according to one of claims 1 to 7, wherein the drinking device ( 22 ) in the drawing direction of the workpiece ( 9 ) after a deposition point of the fiber ( 5 ) on the surface of the workpiece ( 9 ) is arranged. Strand winding system comprising at least two devices according to one of claims 1 to 10, which are arranged modularly one behind the other, so that an emerging from the first device strand-shaped workpiece is passed through the second device, and wherein the strand winding system has at least one pulling device for pulling a strand-like workpiece. Strand winding plant according to claim 11, wherein successive devices are arranged such that the direction of rotation of the respective guide means and / or the relationship between angular velocity and axial velocity of the workpiece are identical or different. A strand winding plant according to claim 12, wherein at least one deflection device is arranged between two devices which deflects the workpiece emerging from the first device so that the strand axis of the second device is not parallel to the strand axis of the first device. Method for producing a fiber-reinforced extruded profile, in which a strand-shaped workpiece ( 9 ) is pulled through a device by means of a pulling device, at least one fiber ( 5 ) from the spool core at least one rotatable about the strand axis fiber coil ( 1 ) and from the fiber coil ( 1 ) via at least one guide device arranged rotatable about the strand axis ( 7 ) on the workpiece ( 9 ) and deposited on the workpiece, wherein the workpiece through a through hole in the coil core of the at least one fiber coil ( 1 ) and by means of a drinking device ( 22 ) with an impregnating agent ( 22a ), in particular a liquid, is wetted. Extruded profile produced by a method according to claim 14.

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