DE102017101023A1 - Method and device for producing a product strand - Google Patents

Abstract

The invention relates to a method for producing a product strand (4), comprising the steps of: providing a first endless foil strand (8); Providing a second, endless sheet strand (12); Providing an endless main strand (16) comprising an endless strand of fibrous strand (18) and a plurality of preformed fiber nets (20) spaced apart from each other, secured one behind the other on a first outer surface (22) of the fiber strand (18) and each formed of continuous filaments wherein the first film strand (8), the second film strand (12) and / or the fiber mat strand (18) is or is covered with a flowable, thermosetting matrix material (26); Continuously merging the first film strand (8), the main strand (16) and the second film strand (12) into a swaging unit (34) to form an endless input strand; Continuous casting of the endless input strand by means of the whale unit (34) into an endless process strand (40) in which the main strand is completely impregnated with the matrix material (26), the first strand of foil terminates the first outer surface (36) of the main strand (16), and the second film strand (12) terminates the second outer side (38) of the main strand (16); and continuously discharging the rolled process string (40) as a product strand (4) from the rolling unit (34). In addition, the invention relates to a device corresponding to the method designed (2).

Description

TECHNICAL AREA

The invention relates to a method and an apparatus for producing a product strand.

BACKGROUND OF THE INVENTION

Fiber-reinforced plastic components are known from the prior art. These are usually made of a resin and fibers. The fibers are thereby introduced into the resin, wherein the resin is subsequently cured. In order to achieve a desired shape of the fiber composite plastic component, a layer of resin material, which is in particular mixed with short fibers, is first placed on a first molding tool of a pressing device. It has proved to be advantageous if then a fiber network is placed on the first layer. Finally, another layer of resin material into which short fibers may likewise be introduced is laid on the first layer of the resin material or the fiber network. This results in a sandwich arrangement of the two resin layers, between which the fiber network is arranged. In order to produce the desired fiber composite plastic component from this sandwich arrangement, another mold moves in the direction of the aforementioned mold, so that the sandwich is compressed between the two molds, which ensures the desired shape for the fiber composite plastic component to be produced. It can also be a curing of the resin by heat.

Once this is completed, the molds can be moved apart again to remove the fiber composite plastic component produced.

The abovementioned steps for producing the fiber composite plastic component can thus be referred to as a pressing method for producing the fiber composite plastic component mentioned. The fiber network disposed between the resin layers serves to provide increased tensile strength along the orientation of the fibers of the fiber network. Forces which act on the fiber composite plastic component in the area of the fiber network can be passed on and / or distributed in a particularly advantageous manner by the fiber network. There are therefore particularly high demands on the exact arrangement of the fiber network within the fiber composite plastic component or within the sandwich arrangement. Should the fiber network accidentally slip within the sandwich assembly and / or should wrinkles arise within the fiber network during manufacture of the sandwich assembly, then under certain circumstances it can not be ensured that the fiber composite plastic component to be produced has the desired mechanical properties. Because in this case can not be forwarded as desired by the fiber network within the fiber composite plastic component and / or distributed to such a faulty manufactured fiber composite plastic component acting forces. It can therefore come to force loads for which the faulty fiber composite plastic component is not formed. Similar adverse effects may arise when the fiber network is twisted, kinked, or otherwise undesirably aligned within the sandwich. For example, when the second resin layer is applied to the fiber network or to the first resin layer, the fiber network may slip, resulting in a partially overlapping region of fibers of the fiber network, although this was not intended. There are analogous disadvantages, as previously explained. Moreover, in the production method explained above, there is the disadvantage that fiber composite plastic components can only be produced stepwise and one after the other, which allows only a low production speed.

SUMMARY OF THE INVENTION

The object of the invention is to provide a method and / or a device by means of which a plurality of individual or interconnected fiber composite semifinished products can be produced as quickly as possible and exactly reproducible, with the most reproducible accurate positioning of fiber networks in a matrix material of the respective semifinished product being ensured can. In this case, the plurality of fiber composite semi-finished products can be arranged to form a common strand. In addition, the strand and / or the fiber composite semi-finished products for an advantageous production of at least one fiber composite plastic component can be used.

According to a first aspect of the invention, the stated object is achieved by a method for producing a product strand according to claim 1. Advantageous embodiments and / or further developments of the method are given in the appended subclaims and the following description.

1. a) Bereitstellen eines ersten, endlosen Folienstrangs;
2. b) Bereitstellen eines zweiten, endlosen Folienstrangs;
3. c) Bereitstellen eines endlosen Hauptstrangs, der einen endlosen Fasermattenstrang und eine Mehrzahl von vorgeformten Fasernetzen aufweist, die voneinander beabstandet, hintereinander auf einer ersten Außenseite des Fasermattenstrangs befestigt und jeweils von Endlosfasern gebildet sind, wobei eine Kontaktseite des ersten Folienstrangs, eine Kontaktseite des zweiten Folienstrangs und/oder der Fasermattenstrang mit einem fließfähigen, duroplastischen Matrixmaterial bedeckt ist oder wird;
4. d) kontinuierliches Zusammenführen des ersten Folienstrangs, des Hauptstrangs und des zweiten Folienstrangs in eine Walkeinheit zu einem endlosen Eingangsstrang, bei dem die Kontaktseite des ersten Folienstrangs eine erste Außenseite des Hauptstrangs und die Kontaktseite des zweiten Folienstrangs eine zweite, zu der ersten Außenseite des Hauptstrangs gegenüberliegend angeordnete Außenseite des Hauptstrangs bedecken;
5. e) kontinuierliches Walken des endlosen Eingangsstrangs mittels der Walkeinheit zu einem endlosen Prozessstrang, bei dem der Hauptstrang mit dem Matrixmaterial vollständig imprägniert ist, der erste Folienstrang die erste Außenseite des Hauptstrangs abschließt und der zweite Folienstrang die zweite Außenseite des Hauptstrangs abschließt; und
6. f) kontinuierliches Ausgeben des gewalkten Prozessstrangs als Produktstrang aus der Walkeinheit.

A method for producing a product strand is proposed which comprises the following steps:

1. a) providing a first endless film strand;
2. b) providing a second, endless sheet strand;
3. c) providing an endless main strand comprising an endless strand of fiber mat and a plurality of preformed fiber nets spaced apart from each other, secured one behind the other on a first outside of the fiber mat strand and each formed of continuous filaments, wherein a contact side of the first film strand, a contact side of the second film strand and / or the fiber mat strand is or is covered with a flowable thermosetting matrix material;
4. d) continuously merging the first film strand, the main strand and the second film strand into a waling unit to an endless input strand, wherein the contact side of the first film strand a first outer side of the main strand and the contact side of the second film strand a second opposite to the first outer side of the main strand cover arranged outside of the main strand;
5. e) continuously swaging the endless input strand by means of the whale unit into an endless process strand in which the main strand is completely impregnated with the matrix material, the first sheet strand completes the first outside of the main strand, and the second sheet strand seals the second outside of the main strand; and
6. f) continuous output of the gewalkten process strand as a product strand from the rolling unit.

The method offers the advantage that a product strand with a consistently high quality, alignment of fiber networks within the product strand and reproducibility can be produced. In addition, the method allows a high production rate of the product strand, especially at very low production costs.

Under a strand is preferably a band-shaped object, in particular ribbon-shaped object understood. The strand may therefore have a line-shaped or at least substantially rectangular cross-section. The longitudinal extent in a longitudinal direction of a strand, preferably in a direction orthogonal to the cross section, is preferably significantly greater than the dimensions of the cross section. In other words, a strand may be defined by a height and width in the transverse direction, wherein the length of the strand is significantly greater than the height and / or width. A strand is preferably referred to as an endless strand if the length is significantly greater than the width and / or height. For example, the length may be at least 5 times, 10 times or 20 times a width and / or height. The above explanations regarding the strand may analogously apply to the product strand, each strand of film, the main strand, the input strand, the process strand and / or the product strand.

The product strand is preferably referred to as such because it is produced by the process. The product strand may preferably be regarded as a plurality of semi-finished products which are arranged continuously one behind the other. A semi-product may also be referred to as a semi-finished product. Each half product may be formed by a portion of the product strand, each half product having at least one fiber network. The product strand has the main strand impregnated with matrix material, with a plurality of preformed fiber nets being spaced apart and disposed one behind the other on the first outside of the associated fiber strand. In each case a half product of the product strand can thus be determined by a section extending in the longitudinal direction of the product strand, which has at least one fiber network. The semiproducts can be separated from the product strand later or by a further process step. In this case, the process can be used to produce several semi-finished products.

A film strand is preferably understood to mean a strip-shaped film, in particular a flat-band-shaped film, wherein the film has a linear or at least substantially rectangular cross-section. A corresponding configuration can be provided in each case for the first, endless film strand and the second, endless film strand. Each of the film strands preferably has a height between 0.01 mm and 2 mm. The height may also be referred to as thickness or thickness. Each of the film strands is preferably formed as a plastic film strand. Thus, each film strand can be formed by a plastic. Each of the film strands may also be referred to as protective film strand and / or be designed accordingly. Because in the product strand, the film strands are preferably used to protect the fully impregnated main strand of the product strand.

According to the method, the provision of an endless main line is provided. The word constituent "main" in the term main strand is preferably used for purposes of distinction. The main strand has an endless fiber mat strand. The fiber mat strand is preferably also referred to as a fiber base or as a fiber base strand. Preferably, the fiber mat strand of a ribbon-shaped fiber mat, a band-shaped fibrous tissue or a formed band-shaped nonwoven fabric. Under the band-shaped configuration may also be understood a flat band-shaped configuration. Under the fiber mat strand is preferably understood a band-shaped object with or from a plurality of fibers. The fibers of the fiber mat strand are preferably glass fibers, carbon fibers, aramid fibers and / or natural fibers. In addition, it is preferably provided that the fibers of the fiber mat strand have an average fiber length between 10 mm and 50 mm. Such fibers are also referred to as long fibers. Thus, the fiber mat strand may have a plurality of long fibers. Preferably, the long fibers of the fiber mat strand are randomly distributed. However, it can also be provided that the long fibers of the fiber mat strand are arranged directed to a fiber fabric, to a nonwoven fabric and / or to a fiber mat. Furthermore, it can be provided that the fibers of the fiber mat strand are formed by short fibers and / or long fibers. The short fibers can each have an average fiber length of up to 10 mm. Particularly preferred is the mean fiber length of short fibers between 2 mm and 10 mm. Moreover, it is preferably provided that the fibers of the fiber mat strand are connected to one another in such a way that they have a mechanical connection to one another. The fiber mat strand may therefore have at least a predetermined tensile strength and / or a predetermined dimensional stability. The fibers of the fiber mat strand can also be impregnated with a not completely cured matrix material, in particular partially impregnated.

On the fiber mat strand, a plurality of preformed fiber nets are spaced apart from each other and mounted one behind the other. For example, the fiber nets can be fastened one behind the other in a row on the fiber mat strand. However, it is also possible that the fiber nets are attached in several rows, for example in two rows, side by side on the fiber mat strand. For each row can apply that the associated fiber networks are spaced from each other and arranged one behind the other on the fiber mat strand. In addition, it is preferably provided that the rows of fiber networks are spaced from each other. It is particularly preferred that none of the fiber networks is overlapped by another fiber network. In other words, the fiber networks can be arranged without overlapping on the fiber mat strand.

Each of the fiber nets may be secured to the fiber mat by means of a plastic material or matrix material. Preferably, the matrix material used for this purpose is an elastomer or a thermoset. It is preferably provided that the thermoset material, if used for the purpose mentioned above, is not fully cured.

Preferably, a preformed fiber network is understood to mean a predetermined arrangement of continuous fibers. Particularly preferably, the mean fiber length of continuous fibers is greater than 50 mm or greater than 60 mm. The continuous fibers of each fiber network are preferably glass fibers, carbon fibers, aramid fibers and / or natural fibers. The continuous fibers can be mechanically interconnected. The connection between the fibers can be formed directly between continuous fiber and endless fiber. Alternatively or additionally, the continuous fibers of a fiber network may be at least partially impregnated with thermosetting matrix material, wherein the matrix material is not completely cured. The preformed fiber network can be understood to mean a predetermined composite of continuous fibers, preformed composite of continuous fibers and / or oriented composite of continuous fibers. The preformed fiber network may also be referred to as a pre-determined sliver or designed accordingly.

In addition, provision may be made for a preformed fiber network to be understood as meaning a predetermined arrangement of a plurality of fiber ribbons, each with or consisting of continuous fibers, which are connected to one another at at least one connection point. This can form meshes and / or openings. Therefore, a mesh-like configuration of the fiber network can be formed through the meshes and / or openings. By choosing the length of the slivers and / or the arrangement of the at least one connection point, the shape of the fiber network or the net-shaped configuration can be predetermined or be.

In addition, it is particularly preferably provided that the continuous fibers of each preformed fiber network are at least partially connected to each other and / or arranged to each other, that hold the continuous fibers of the respective fiber network mutually. By the said compound or the mutual holding of the composite of continuous fibers can be created or guaranteed. Moreover, it has proven to be advantageous if the continuous fibers of each fiber network are aligned at least substantially along a predetermined trajectory. In this way, it can be ensured with particular certainty that a product strand to be produced has corresponding fiber nets which, when used to produce a fiber composite plastic component, result in a corresponding integration into the fiber composite plastic component, so that the fiber composite plastic component absorbs forces and along one to the configuration of the respective fiber network can distribute corresponding load paths. Each of the fiber networks may be referred to as a so-called Tailor Fiber Placement (TFP) or designed accordingly. A TFP is a semifinished fiber product.

Preferably, the fiber nets are secured in a longitudinal direction of the fiber mat strand one behind the other and spaced from each other on the first outer side of the fiber mat strand. The first outer side of the fiber mat strand can be, for example, an upper side of the fiber mat strand. The first outer side of the fiber mat strand preferably extends in the longitudinal direction of the fiber mat strand and in a transverse direction of the fiber mat strand. On the first outer side of the fiber mat strand, the fiber networks are preferably arranged flat. Thus, the endless main strand can maintain its preferred ribbon-like or ribbon-like configuration.

The first film strand has an associated contact page. This contact page may for example be a bottom of the first film strand. The contact side of the first film strand preferably extends in the longitudinal and transverse directions of the first film strand. The second film strand has an associated contact page. This contact page may for example be a bottom of the second film strand. The contact side of the second film strand preferably extends in the longitudinal direction and transverse direction of the second film strand.

In addition, it is provided that the contact side of the first film strand, the contact side of the second film strand and / or the fiber mat strand is covered and / or is covered with a flowable, thermosetting matrix material. A covering of the fiber mat strand with the matrix material may also be at least partially present in particular in that the fiber mat strand is or is impregnated with the flowable, thermosetting matrix material. A thermosetting matrix material is or is preferably based on an epoxy resin, a crosslinkable polyurethane resin or a crosslinkable, in particular unsaturated, polyester resin. However, other thermosetting matrix materials are also possible.

Preferably, the covering of the at least one contact side and / or the fiber mat strand with the flowable thermosetting matrix material is already completed before the first film strand, the second film strand and / or the main strand are provided. However, it can also be provided that the covering of the contact side of the first film strand, the covering of the contact side of the second film strand and / or the covering of the fiber mat strand with the flowable, thermosetting matrix material takes place before the continuous merging takes place in step d). The corresponding covering can thus take place, for example, before step d) and after step a), step b) and / or step c).

A thermosetting matrix material may be, for example, or based on a thermosetting reaction resin such as an epoxy resin, a vinyl ester resin and / or an unsaturated polyester resin. The thermosetting matrix material is still flowable. The flowable, thermosetting matrix material is therefore not fully cured. Thus, a flowable matrix material may be understood to mean an incompletely cured matrix material and / or dough-like matrix material.

In addition, a continuous merging of the first film strand, the main strand and the second film strand is provided in a rolling unit to an endless input strand. The input string is thus formed continuously by merging the aforementioned strands. In the continuous merge, the contact side of the first sheet strand is preferably continuously brought into contact with the first outside of the main strand so that the contact side of the first sheet strand covers the first outside of the main strand. In addition, the contact side of the second film strand is continuously brought into contact with the second outer side of the main strand, so that the second film strand covers the second outer side of the main strand. The first outer side of the main strand can be for example an upper side of the main strand, which preferably extends in the longitudinal direction and transverse direction of the main strand. The second outer side of the main strand can be, for example, a lower side of the main strand, which also extends in the longitudinal direction and transverse direction of the main strand. The first outer side and the second outer side of the main strand can thus be opposite to one another, in particular arranged parallel to one another, outer sides of the main strand. The endless input string is fed into the waling unit.

By means of the rolling unit is then a continuous walking of the endless input line to the endless process line. By way of example, but not limited to, for example, compaction, rolling, pressing, kneading, pressing and / or the like can be understood. The rolling unit may have oppositely arranged rollers, which are designed for walking. The continuous walking is preferably carried out in such a way that the flowable, thermosetting matrix material completely impregnates the main strand. It can do that Furthermore, continuous rolls should be designed such that the fibers of the fiber mat strand from the process strand and the fibers of the fiber nets from the process strand are completely embedded in the flowable, thermosetting matrix material. In addition, it is preferably provided that the continuous casting takes place in such a way that the fiber mat strand and the fiber nets at least substantially maintain their arrangement, and in particular the at least substantially central arrangement of the respectively associated fibers. In addition, continuous casting of the endless input strand to the endless process strand is accomplished such that the first sheet strand completes the first outer side of the main strand and the second film strand seals the second outer surface of the main strand. This is preferably carried out in such a way that the respective film strand is in direct contact with the matrix material and / or the fibers of the main strand, preferably bubble-free, void-free and / or gap-free. Each of the film strands can therefore cover a respective outside of the main strand continuously and / or flatly. Thus, each of the film strands can protect the main strand.

In an advantageous embodiment, the contact side of the first film strand is (initially) covered with the flowable, thermosetting matrix material, before the continuous merging and continuous rolling takes place. With continuous casting, in this example, the flowable, thermosetting matrix material comes into contact with the first outside of the main strand. In the subsequent, continuous casting, the main strand is completely impregnated with the flowable, thermosetting matrix material, so that the fibers of the main strand are completely embedded in the matrix material, and so that the second film with the matrix material and / or the fibers, in particular exclusively, in contact comes. From the example explained above, it can be seen that the arrangement of the fiber nets on the fiber mat strand is at least substantially not changed by the continuous rolling. In other words, the continuous walking can be configured such that the arrangement of the fiber nets on the fiber mat strand remains at least substantially unchanged.

Alternatively or additionally, the contact side of the second film strand may be (initially) covered with flowable, thermosetting matrix material before the continuous merging and continuous rolling takes place. With continuous casting, in this example, the flowable thermoset matrix material comes into contact with the second outside of the main strand or with the first and second outside of the main strand. In the subsequent, continuous casting, the main strand is completely impregnated with the flowable, thermosetting matrix material, so that the fibers of the main strand are completely embedded in the matrix material.

Alternatively or additionally, the fiber mat strand can be covered with flowable, thermosetting matrix material before the continuous merging and the continuous walking takes place.

In practice, it has been found that the arrangement of the plurality of preformed fiber networks on the endless fiber mat strand of the endless main strand is precisely and reproducibly precisely possible. Because the fiber networks can be attached individually or in groups on the endless fiber mat strand. In addition, the appropriate attachment of the fiber nets on the fiber mat strand ensures close proximity and / or bonding between each fiber network and the fiber mat strand, and particularly to the associated fibers. In addition, such a main strand ensures a particularly good and / or uniform impregnation with matrix material. If a correspondingly produced, endless main strand is made available, continuous casting of the endless input strand to the endless process strand ensures that the particularly precise alignment and / or reproducible, precise alignment of the fiber nets on the fiber strand is transmitted to the process strand in an analogous manner , A particular advantage therefore consists in a continuous and / or industrial impregnation of the fibers of the main strand with the matrix material. Because even the impregnation can be made very fast and / or cost efficient. In addition, such impregnation provides a high degree of Reporduzierungsgrad. Continuous walking also ensures that potential kinks, displacements, overlaps and / or the like with respect to the fibers of the fiber mat strand and / or the fiber nets can be effectively prevented. This is the case, in particular, when the swivel unit is designed as a roller swivel unit.

Due to the preferred immediate arrangement of the fiber nets on the fiber mat strand of the main strand was also found that the matrix material content of the process strand and thus the product strand to be produced is reduced to a minimum. In other words, the process strand and / or the product strand may have a particularly high fiber content of, for example, at least 45%, 50%, 55% or 60%.

The continuous walking of the endless input string to the endless process string also allows the reduction of so-called safety factors for the product strand to be produced. Because the reproducible accuracy with regard to the arrangement of the fiber nets to the fiber mat strand within the product strand and / or the process strand requires less fibers overall and thus less matrix material. This is particularly attributable to the advantage that a shift of the fiber networks and / or deformation of the fiber networks within the process strand relative to the fiber mat strand of the process strand during the Walkens can be effectively prevented. This includes in particular the prevention of wrinkling.

Finally, for the method, a continuous dispensing of the rolled process strand as a product strand in a process direction from the rolling unit is provided. The process direction is preferably the direction in which the process strand is guided by the rolling unit during continuous rolling. The rolled process strand thus forms the product strand after fulling.

The product strand as such and / or a portion thereof can, in particular in a further process step, be used to produce a cured, fiber-reinforced plastic product. A product made therewith has the advantageous properties which has the precise arrangement of the at least one fiber network relative to the fiber mat strand within the product strand. Reference is therefore preferably made to the preceding explanations in an analogous manner. In particular, a corresponding product can absorb particularly high forces and distribute them advantageously by means of the fiber network. This may apply in particular to load paths of the product, wherein continuous fibers are preferably arranged along the load paths. In addition, continuous fibers of a fiber network may be disposed at predetermined load introduction sites of the product. This can be taken into account in the provision of the fiber networks or in the provision of the main line. The at least one fiber nets for a product can therefore be designed accordingly. For example, a TFP can be designed accordingly. In this case, the product may have a particularly low weight, since safety factors can be reduced and / or a particularly high fiber density can be present.

An advantageous embodiment of the method is characterized in that a continuous rolling of the product strand takes place on a coil called a product coil. The continuous rolling up of the product strand can therefore also be provided as a step g). The coil or the product coil may be formed, for example, as a roll. Thus, the continuously discharged product strand can be rolled up continuously on the product reel. When the production of the product strand is completed, the product coil can carry the corresponding product strand fully rolled up. The product coil can thus be used as a base for handling, moving and / or placing. Thus, for example, the product package with the rolled-up product strand can first be temporarily stored and / or transported to another production unit, where the product strand can then be used to produce fully cured products. Since the product strand has both the first foil strand and the second foil strand, sticking between the individual turns of the product strand on the product coil is effectively prevented. If the product strand is now to be used to produce a fully cured product, then the product strand can be unrolled from the product coil again, without negatively affecting the arrangement of the fibers within the product strand.

A further advantageous embodiment of the method is characterized by a repeated separation of an end section of the product strand along a cutting line between two fiber networks of the product strand by means of a separation unit, so that each end section has at least one fiber network integrated therein. Each end section is preferably an end section of the product strand viewed in the process direction. In this case, the product strand is preferably output from the rolling unit in the process direction. The process direction preferably corresponds to a longitudinal direction of the product strand as it is continuously discharged from the rolling unit. Within the product strand, the fiber nets are spaced apart and arranged one behind the other within the product strand. By the distance between each two adjacent fiber networks so a cutting line can be determined along which an end portion of the product strand is separable without destroying the fiber networks and / or adversely affect. For this purpose, the method can be designed accordingly. Along a corresponding section line between two fiber nets, the separation of the end section of the product strand can then be effected by means of the separation unit. As a result, the severed end portion has at least one fiber network. It can preferably be provided that at least one or each end section has a plurality of fiber networks integrated therein. The corresponding repeated separation can be designed accordingly. If now repeated end portions of the product strand separated, a plurality of End sections are produced. It may therefore be preferred that the process according to the present invention serves both for producing a product strand and for producing a plurality of end sections of the product strand. Alternatively, it can be provided that the method is used to produce a plurality of end sections of a product strand.

The above-described advantageous embodiment of the method has the advantage that each end section has at least one fiber network integrated therein, which is at least substantially undestroyed and / or unchanged. Each end section may preferably also be referred to as a semi-finished product and / or designed accordingly. Because each end portion can serve to produce a final, especially fully cured, end product. Thus, the method may also include the step of producing a cured final product by means of or from each of the end sections. For the corresponding advantages for the end product, reference is made to the preceding explanations in an analogous manner. It has proved to be advantageous if each end section has exactly one, two, three or even further fiber networks. The same then applies analogously to the final product.

An advantageous embodiment of the method is characterized in that each fiber network is fixed by means of an elastomer and / or a thermoplastic on the fiber mat strand. Alternatively or additionally, each fiber network may be secured to the fiber mat by means of a non-fully cured thermoset matrix material. The attachment preferably refers to the main strand having the endless fiber mat strand and the plurality of preformed fiber networks. The attachment of the fiber nets on the fiber mat strand by means of an elastomer and / or thermoplastic has proven to be a cost effective and / or effective way to place the preformed fiber nets as accurately as possible on the fiber mat strand and to attach it. For in the fastening process, the elastomer and / or the thermoplastic is first heated so that it is flowable, at least viscous flowable. Each fiber network can then be placed on the fiber mat strand, so that the elastomer and / or the thermoplastic acts as a bonding material between the respective fiber network and the fiber mat strand. Before complete curing or cooling of the elastomer and / or the thermoplastic occurs, accurate positioning of the respective fiber network can still take place. This ensures that a plurality of fiber networks are spaced apart from one another in a predetermined and / or precisely determined orientation and can be fastened one behind the other on the fiber mat strand. If the endless main strand is provided, then it is preferably provided that the elastomer and / or the thermoplastic has hardened. The main strand can therefore be provided and / or handled without causing accidental and / or unwanted slippage of the fiber nets on the fiber mat strand.

A further advantageous embodiment of the method is characterized in that each fiber network is secured by means of an elastomer and / or thermoplastic on the fiber mat strand before the endless main strand is provided. This allows production of the main strand before the main strand is then provided according to step c). This is advantageous from an economic point of view since, for example, a plurality of main strands can be produced before one of these main strands is then provided according to step c).

A further advantageous embodiment of the method is characterized in that each fiber network is sewn by means of an elastomeric thread and / or thermoplastic thread on the fiber mat strand. The or each at least one elastomeric thread can thus form the elastomer for fixing a fiber network on the fiber mat strand. The or each at least one thermoplastic thread can thus form the thermoplastic for fastening a fiber network on the fiber mat strand. The use of an elastomer thread and / or thermoplastic thread offers the advantage that as little elastomeric material or thermoplastic material as possible is used to secure a fiber network to the fiber mat strand. The same applies accordingly to each of the fiber networks. As a result, the product strand has the lowest possible content of elastomer and / or thermoplastic. Despite the small amount that can be used to attach the respective fiber network on the fiber mat strand, an exact positioning and / or attachment to the fiber mat strand can be ensured. This is especially true when the fiber network has many openings and / or is very branched. Because then can only be used there by means of elastomeric thread elastomer and / or only by the thermoplastic thread there are expended thermoplastic where the respective fiber network comes into contact with the fiber mat strand.

A further advantageous embodiment of the method is characterized by a step c.1), namely a continuous application of matrix material to the contact side of the first film strand by means of a first application unit prior to the continuous merging according to step d). The matrix material is flowable, thermosetting matrix material. The matrix material thus forms completely or at least proportionally the flowable, thermosetting matrix material, which serves in step e) for complete impregnation of the main strand. The first application unit can be designed, for example, as a metering unit for the matrix material. Moreover, it has proved to be advantageous if the first application unit is designed as a controllable application unit. The first application unit can be controllable such that the applied amount of the matrix material per unit time is controllable. Thus, the method may also be characterized in that the continuous application of matrix material is designed as a controlled, continuous application of matrix material, so that a predetermined amount of matrix material per unit time is applied to the contact side of the first film strand by means of the first application unit. The amount of matrix material to be applied per unit time can be predetermined. In addition, it has proved to be advantageous if the first application unit has a doctor blade, which is arranged at a distance from the contact side of the first film strand, wherein the matrix material is applied in front of the doctor, so that the respective distance of the doctor blade to the contact side of the first Film strand determined the amount of matrix material applied per unit time. It may be provided that the first application unit is controllable such that the distance of the doctor blade is controllable to the contact side of the first sheet strand. The distance can be predetermined.

A further advantageous embodiment of the method is characterized by a step c.2), namely a continuous application of matrix material to the contact side of the second film strand by means of a second application unit before the continuous merging according to step d). The second application unit does not necessarily require the first application unit. Rather, the terms "first" and / or "second" are used for purposes of distinction, and preferably not for characterization.

The matrix material that can be applied by the second application unit is a flowable thermosetting matrix material. The matrix material thus forms completely or at least proportionally the flowable, thermosetting matrix material which serves in step e) for complete impregnation of the main strand. The second application unit can be designed, for example, as a metering unit for the matrix material. Moreover, it has proved to be advantageous if the second application unit is designed as a controllable application unit. The second application unit may be controllable such that the applied amount of matrix material per unit time is controllable. Thus, the method can also be characterized in that the continuous application of matrix material is designed as a controlled, continuous application of matrix material, so that a predetermined amount of matrix material per unit time is applied to the contact side of the second film strand by means of the second application unit. The amount of matrix material to be applied per unit time can be predetermined. In addition, it has proved to be advantageous if the second application unit has a doctor blade, which is arranged at a distance to the contact side of the second film strand, wherein the matrix material is applied in front of the doctor, so that the respective distance of the doctor blade to the contact side of the second Film strand determined the amount of matrix material applied per unit time. It can be provided that the second application unit is controllable such that the distance of the doctor blade is controllable to the contact side of the second film strand. The distance can be predetermined.

A further advantageous embodiment of the method is characterized by a step c.3), namely a continuous application of matrix material to the main strand by means of a third application unit before the continuous merging according to step d). As previously explained in an analogous manner, the term "third" is used for purposes of distinction. The matrix material thus forms completely or at least proportionally the flowable, thermosetting matrix material which serves in step e) for complete impregnation of the main strand. The third application unit thus does not necessarily require the first and / or the second application unit. The third application unit can be designed, for example, as a metering unit for the matrix material. Moreover, it has proved to be advantageous if the third application unit is designed as a controllable application unit. In this case, the third application unit can be controllable in such a way that the applied quantity of the matrix material per time unit can be controlled. Thus, the method can also be characterized in that the continuous application of matrix material is designed as a controlled, continuous application of matrix material, so that a predetermined amount of matrix material per unit time is applied to the main strand by means of the third application unit. The amount of matrix material to be applied per unit time can be predetermined. In addition, it has proved to be advantageous if the third application unit has a doctor blade which is arranged at a distance from the main strand, wherein the matrix material is applied in front of the doctor blade, so that the respective distance of the doctor blade to the main strand the amount of matrix material applied per unit time certainly. It may be provided that the third application unit is controllable such that the distance of the doctor blade to the contact side of the second film strand is controllable. The distance can be predetermined.

The matrix material applied by the at least one application unit serves for, in particular complete, formation of the flowable, thermosetting matrix material which completely impregnates the main strand in step e). Each of the matrix materials applied by an application unit can thus be a flowable thermosetting matrix material. Together, the matrix materials can then form the flowable, thermosetting matrix material which serves to fully impregnate the main strand in step e).

A further advantageous embodiment of the method is characterized by a determination of a first sensor signal by contactless detection of the main strand, the first foil strand, the second foil strand or the input strand. In addition, the method preferably includes controlling the rolling unit and / or the at least one application unit based on the first sensor signal. The non-contact detection can refer, for example, to at least one geometric size of the main strand, the first foil strand, the second foil strand and / or the input strand. The determination of the first sensor signal and / or the contactless detection can take place before the continuous merging according to step d), in particular if it does not relate to the input line. However, it can also be provided that the determination of the first sensor signal or the contactless detection takes place on the basis of the endless input line. Contactless sensing may be, for example, the form of a fiber network, the location of a fiber network on the fiber mat strand, the orientation of a fiber network, the height of a fiber network, the width of a fiber network, the height of the main strand, the width of the main strand , refer to the height of the first film strand with applied matrix material, to the height of the second film strand with matrix material and / or to the height of the main strand with applied matrix material. The first sensor signal can therefore represent at least one corresponding quantity which is detected without contact. For example, based on the first control signal, the turn unit can be controlled. For example, based on the first control signal, a force exerted by the swivel unit on the process line for walking can be controlled. In addition, the swivel unit may, for example, be controlled such that the passage cross-section and / or the passage height for the process string is controlled by the swivel unit based on the first sensor signal. Furthermore, it has proved to be advantageous if at least one of the application units is controlled based on the first control signal. If, for example, the height of the fiber network is detected contactlessly on the fiber mat strand, this can be represented by the first control signal. The at least one application unit can be controlled based on the first control signal such that one or in each case a dependent of the first control signal amount of matrix material is applied to the contact side of the first film strand, on the contact side of the second film strand and / or on the main strand In particular, so that the continuous walking in accordance with step e) is achieved to a complete impregnation of the main strand with matrix material.

A further advantageous embodiment of the method is characterized by a determination of a second sensor signal by contactless detection of the product strand.

In addition, it is preferably provided for the method that the rolling unit, the at least one application unit and / or the separation unit is controlled or controlled on the basis of the second control signal. The non-contact detection of the product strand may refer to geometric sizes of the product strand. The contactless detection of the product strand can relate, for example, to the detection of the fiber networks and / or to the intermediate distances between two adjacent fiber networks. In each case, two adjacent fiber networks can be arranged spaced from one another by an intermediate section of the product strand. In addition, it has proved to be advantageous if the contactless detection of the product strand relates, for example, to the detection of the arrangement of the fiber networks, the alignment of the fiber networks and / or the position of the intermediate sections. Based on the second control signal can then be checked, for example, if the product strand has the desired properties. For example, one property may be the complete impregnation of the main strand with matrix material. It may also refer to a desired distance between two adjacent fiber networks within the product strand. Therefore, based on the second control signal, the at least one application unit and / or the swivel unit can be controlled. For example, based on the second control signal, it is possible to control the amount of matrix material per unit time applied by a dispensing unit. This preferably ensures that the product strand has a desired, in particular predetermined, cross-sectional area. Alternatively or additionally, it has also proven to be advantageous if the rolling unit is controlled based on the second control signal. Because even these can have an influence on the cross-sectional area of the product strand to be produced. Furthermore, it is possible that the separation unit is controlled based on the second control signal. Because the second For example, control signal may represent the position of an intermediate portion between two adjacent fiber networks. Based on this, the severing unit may be configured to determine a cutting line. Therefore, for example, the separation unit may be controlled such that the separation of an end portion based on the second control signal along a section line through an intermediate portion is performed. This ensures that each end section has at least one fiber network, with each fiber network preferably being undestroyed. Because the separation between two adjacent fiber networks along the section line through the intermediate section, the fiber networks are not affected. The resulting end portion can therefore be used particularly advantageously for producing a fully cured end product.

According to a second aspect of the invention, the object mentioned at the outset is achieved by a device for producing a product strand. The apparatus includes a first film spool for providing a first endless film strand, a second film spool for providing a second endless film strand, and a main unit for providing an endless main strand having an endless fiber mat strand and a plurality of preformed fiber nets spaced from one another , mounted one behind the other on a first outer side of the fiber mat strand and each formed by continuous fibers. In addition, the device has an application unit, which is designed for the continuous application of flowable thermosetting matrix material on a contact side of the first film strand, on a contact side of the second film strand or on the main strand. In addition, the apparatus comprises a guide unit, which is designed for continuous merging of the first film strand, the main strand and the second film strand in a rolling unit to an endless input strand, wherein the contact side of the first film strand a first outer side of the main strand and the contact side of the second film strand Cover a second, opposite to the first outer side of the main strand outside of the main strand. In addition, the apparatus includes a whale unit configured to continuously swirl the endless input strand into an endless process strand in which the main strand is completely impregnated with the matrix material, the first strand of foil terminates the outside of the main strand, and the second strand of film seals the second outside of the main strand terminates, wherein the Walkeinheit is designed for continuously outputting the gewalkten process strand as an endless product strand. In this case, the rolling unit should not be designed to dispense the endless product strand in a process direction.

With respect to the apparatus, reference is made to the foregoing explanations, preferred embodiments, preferred features, preferred effects, and / or advantages in an analogous manner as discussed for the method according to the first aspect of the invention or the associated embodiments.

Preferably, the apparatus is configured and / or configured to carry out the method according to the first aspect of the invention. Furthermore, the device may be designed and / or configured to carry out at least one of the preferred embodiments of the method and / or a method having at least one of the preferred features.

The device offers the advantage that a product strand with a consistently high quality, alignment of fiber networks within the product strand and reproducibility can be produced. In addition, the device allows a high production rate of the product strand, especially at particularly low production costs.

An advantageous embodiment of the device is characterized in that the guide unit has a plurality of deflection rollers for guiding the first film strand, the second film strand and / or the main strand. The guide unit may have, for example, at least one deflection roller for guiding the first film strand, at least one, in particular further, deflection roller for guiding the second film strand and / or at least one, in particular further, deflection roller for guiding the main strand. A pulley offer the advantage that a strand can be guided over it, without particularly high tensile forces being exerted on the respective strand. Thus, the first film strand, the second film strand and / or the main strand can be performed without the application of particularly high tensile forces on the respective strand by means of the guide unit.

In the following, advantageous embodiments of the device will be discussed. In order to avoid repetition, reference is preferably made to the foregoing explanations, preferred embodiments, preferred features, preferred effects, and / or advantages in an analogous manner to the preferred embodiments of the apparatus and / or the advantageous features of the apparatus discussed in this regard have been discussed for the analog, advantageous embodiments of the method and the associated advantageous features.

An advantageous embodiment of the device is characterized in that the device has a plurality of application units, which are each designed for applying flowable, thermosetting matrix material. If the device has a plurality of application units, a particularly efficient impregnation of the main strand with the matrix material can be achieved. The matrix material may in this case be composed of or formed by the flowable thermosetting matrix material applied by the at least one application unit. An advantageous embodiment of the device is characterized in that the device has a first application unit, which is designed for the continuous application of flowable, thermosetting matrix material on a contact side of the first film strand. The first application unit may form the or one of the application units of the device. An advantageous embodiment of the device is characterized in that the device is a second application unit, which is designed for the continuous application of flowable, thermosetting matrix material on the contact side of the second film strand. The second application unit may form the or one of the application units of the device. The terms "first", "second" and / or "third" are used for purposes of distinction.

A further advantageous embodiment of the device is characterized in that the device has a first sensor which is designed for contactless detection of the main strand, the first foil strand, the second foil strand or the input strand. Preferably, the sensor is configured to provide a first sensor signal based on the non-contact detection of the respective strand. In addition, the device may comprise a control unit, which is formed based on the first sensor signal for controlling the rolling unit, the rolling unit and / or the at least one application unit. The contactless detection takes place for the device thereby by means of the first sensor. The resulting first sensor signal can then be transmitted to the control unit of the device. This can then control the roll unit, the application unit and / or the at least one application unit based on the first sensor signal. For this purpose, the control unit can be designed accordingly.

An advantageous embodiment of the device is characterized in that the device has a separation unit which is designed for repeatedly separating an end section of the product strand, in particular in the process direction, along a cutting line between the fiber networks of the product strand, so that each end section has at least one integrated fiber network having. Preferably, the separation unit is adapted to carry out the repeated separation according to the corresponding, advantageous embodiment of the method.

A further advantageous embodiment of the device is characterized in that the device has a second sensor which is formed for contactless detection of the product strand and as a result thereof for providing a second sensor signal. In addition, the device preferably has one or the control unit, which is formed based on the second sensor signal for controlling the rolling unit, the application unit, the at least one application unit and / or the separation unit. Preferably, the second transmitter is configured to provide the second sensor signal based on the sensed product string. Furthermore, it is preferably provided that the device is designed by means of the second sensor for determining the second sensor signal by the contactless detection of the product strand. In addition, the device is preferably designed to transmit the second sensor signal to one or the control unit. It may be provided that the control unit is a further control unit or the control unit that has been discussed in connection with the first sensor signal. The further discussion therefore refers to one of the two control units and is referred to as a control unit for the sake of simplicity. Based on the second control signal, the control unit is preferably designed to control the rolling unit, the at least one application unit or the separation unit.

A further advantageous embodiment of the device is characterized in that the main unit has a fiber coil for providing the main strand. The fiber coil may be formed by a coil which is designed for winding and / or unwinding of the main strand. The fiber bobbin can therefore be designed to provide the main strand by a, in particular continuous, unwinding a previously wound main strand.

A further advantageous embodiment of the device is characterized in that the main unit has a fiber strand coil for providing the fiber mat strand and a sewing unit. The fiber strand coil is preferably designed to provide a (in particular continuously) unwound fiber strand. This can then form an endless fiber mat strand. The sewing unit is preferably designed to repeatedly and sequentially sewn a fiber network onto the continuous fiber mat strand unwound continuously from the fiber strand bobbin, so that an endless fiber mat strand consists of the endless fiber mat strand with a plurality of fibers Fibrous nets formed, which are spaced apart, mounted one behind the other on a first outer side of the fiber mat strand and each formed of continuous fibers. The respective attachment can be ensured and / or formed by a corresponding seam. Thus, the main unit may be configured to provide the fiber mat strand unwound continuously from the fiber bobbin. On the unwound, endless strand of fiber mat, the sewing unit can then sequentially sewn each a fiber network. Thus, sequentially a plurality of fiber nets can be sewn onto the fiber mat strand. This creates the endless main strand. Sewing by means of the sewing unit preferably takes place in such a way that the fiber nets sequentially sewn onto the endless fiber mat strand are spaced apart from one another. This can effectively prevent adjacent fiber networks from overlapping. The sewing unit may be designed accordingly. By means of the main unit and the sewing unit, the device offers the possibility that an individually manufactured main line can be provided. In this case, for example, for a certain period of time or based on a predetermined number of fiber networks, the same type of fiber networks can be used to receive them on the fiber mat strand.

list of figures

• 1 zeigt eine vorteilhafte Ausgestaltung der Vorrichtung in einer schematischen Darstellung.
• 2 zeigt eine vorteilhafte Ausgestaltung eines Abschnitts des Hauptstrangs in einer schematischen Darstellung.
• 3 zeigt eine weitere vorteilhafte Ausgestaltung der Vorrichtung in einer schematischen Darstellung.
• 4 zeigt eine weitere vorteilhafte Ausgestaltung der Vorrichtung in einer schematischen Darstellung.
• 5 zeigt eine vorteilhafte Ausgestaltung eines Abschnitts des Produktstrangs in einer schematischen Darstellung.
• 6 zeigt eine vorteilhafte Ausgestaltung des Verfahrens in einer schematischen Darstellung.
• 7-10 zeigen jeweils eine weitere vorteilhafte Ausgestaltung des Verfahrens in einer schematischen Darstellung.

Other features, advantages and applications of the present invention will become apparent from the following description of the embodiments and the figures. All described and / or illustrated features alone and in any combination form the subject matter of the invention, regardless of their composition in the individual claims or their back references. In the figures, the same reference numerals for identical or similar objects.

• 1 shows an advantageous embodiment of the device in a schematic representation.
• 2 shows an advantageous embodiment of a portion of the main strand in a schematic representation.
• 3 shows a further advantageous embodiment of the device in a schematic representation.
• 4 shows a further advantageous embodiment of the device in a schematic representation.
• 5 shows an advantageous embodiment of a portion of the product strand in a schematic representation.
• 6 shows an advantageous embodiment of the method in a schematic representation.
• 7 - 10 each show a further advantageous embodiment of the method in a schematic representation.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

In the 1 is an advantageous embodiment of the device 2 reproduced in a schematic representation. The device 2 used to make a product strand 4. The device 2 has a first film spool 6 on. The first film spool 6 is to provide a first, endless sheet strand 8th educated. So the first film strand 8th for example, from the first film reel 6 be unrolled to the first film strand 8th to provide continuously. The one from the first film reel 6 provided first foil strand 8th is also the first, endless foil strand 8th designated. The foil strand 8th may be referred to as endless if, for example, it has a length of more than 3 m, 5 m or 10 m. In addition, the device 2 a second film spool 10 on. The second film spool 10 is to provide a second, endless sheet strand 12 educated. The second, endless film train 12 is also called second foil strand 12 designated. The second film strand 12 can, for example, from the second film reel 10 be unrolled, leaving the second foil strand 12 as an endless foil strand 12 can be provided. The second film strand 12 can be as endless foil strand 12 be designated, for example, if this has a length of more than 3 m, 5 m or 10 m. Each of the two film spools 6 . 10 may be formed by a coil type. In addition, the device 2 a main unit 14 on. The main unit 14 is to provide an endless main strand 16 educated. The main strand 16 can as an endless main strand 14 be designated, for example, if this has a length of more than 3 m, 5 m or 10 m. The main unit 14 can one as a fiber coil 42 Have designated coil. The fiber coil 42 can to provide the endless main strand 16 be educated. From the fiber coil 42 can be the main strand 16 for example, be unrolled.

A section of the endless main strand 16 is in the 2 reproduced in a schematic plan view. The section of the main strand 16 from the 2 should be representative of the design of the entire, endless main strand 16 be. In the following, therefore, the main strand 16 , also for the explanation to the 2 , Referenced. The main strand 16 has an endless fiber mat strand 18 on. The fiber mat strand 18 extends in a longitudinal direction L. The fiber mat strand 18 is, for example, an in Longitudinal L extending, band-shaped fiber mat formed. Basically, for the fiber mat strand 18 however, another fiber structure may be provided. So can the fiber mat strand 18 be formed for example by a longitudinally extending L, band-shaped fabric strand. The fiber mat strand 18 preferably has long fibers or a combination of long fibers and short fibers. Preferably, the fibers of the fiber mat strand 18 arranged randomly distributed. In addition, it has proved to be advantageous if the fiber mat strand 18 and / or the associated fibers are preimpregnated by a thermosetting material. The thermosetting matrix material is not completely cured yet. As the fiber mat strand 18 is preferably band-shaped or more preferably flat band-shaped, is the transverse extent in the transverse direction Q and the extension in a direction H, which is the height of the fiber mat strand 18 each represented clearly smaller than the extension in the longitudinal direction L.

In addition, the main strand 16 a plurality of preformed fiber nets 20 on. Each of the fiber nets 20 can be formed by a directed composite of continuous fibers. In this case, the continuous fibers of each fiber network 20 be aligned so that they are aligned along a predetermined trajectory and / or that they are at least partially arranged in a ring. Thus, from any fiber network 20 a net-shaped structure and / or a structure with openings and meshes may be formed. Like from the 2 By way of example, a fiber network may be used 20 Have a triangular basic structure, moreover, endless fibers are arranged such that within the triangular structure, an at least substantially oval-shaped mesh is provided. An appropriate form can be used for each of the fiber nets 20 be provided. That's why the fiber nets become 20 also as preformed fiber nets 20 designated. The fiber nets 20 of the main strand 16 are spaced apart and one behind the other on a first outer side 22 of the fiber mat strand 18 attached. The first outside 22 of the fiber mat strand 18 For example, a top or bottom of the fiber mat strand 18 be. Preferably, the first outside 22 arranged in a plane which is spanned by the longitudinal direction L and transverse direction Q. It is particularly preferred that each adjacent fiber networks 20 with, in particular at least, a predetermined distance A are spaced from each other. Each of the fiber nets 20 is preferably by means of a thermoplastic on the fiber mat strand 18 attached. The thermoplastic can be used for the respective fiber network 20 serve as an adhesive to the desired attachment of the respective fiber network 20 on the fiber mat strand 18 to ensure. It has proven to be particularly advantageous when the thermoplastic is used in the form of a thermoplastic thread to attach the fiber nets 20 on the fiber mat strand 18 to ensure. So every fiber network can 20 by means of a thermoplastic thread on the fiber mat strand 18 sewn or sewn on. The use of a thermoplastic thread offers the advantage that very little thermoplastic must be used to achieve the desired attachment of the fiber nets 20 on the fiber mat strand 18 to ensure.

In addition, it is preferably provided that the fiber networks 20 in a row one behind the other, ie preferably in a row in the longitudinal direction L of the fiber mat strand 18 , on the fiber mat strand 18 are attached. As exemplified by the 2 As can be seen, the fiber nets can 20 but also in several rows, in particular in two rows, be arranged. Each row has several fiber nets 20 arranged one behind the other, preferably in the longitudinal direction L of the fiber mat strand 18 , If several rows are provided, the fiber networks 20 in a transverse direction Q of the fiber mat strand 18 grouped such that between each adjacent groups of fiber networks 20 from the different rows a common, aligned distance A is created. The main strand 16 So can several subsections 44 have, over a certain distance A in the longitudinal direction L free of fiber networks 20 are. These sections 44 can be used to with the later to be produced product strand 4 a separation of an end portion 68 to allow without destroying the fiber networks 20 cause.

The device 2 also has at least one application unit 24 for the continuous application of flowable, thermosetting matrix material 26 on a contact page 28 of the first film strand 8th is trained. Now, for example, the first sheet strand 8th from the first film spool 6 unrolled, can thereby a flowable thermosetting matrix material 26 by means of the application unit 24 continuously on the contact page 28 of the first film strand 8th be applied. The flowable, thermosetting matrix material 26 is also called matrix material 26 designated. The application of the matrix material 26 can by means of the application unit 24 done so that the contact page 28 of the first film strand 8th with a predetermined thickness and / or constant thickness of matrix material 26 is covered. The contact page 28 of the first film strand 8th For example, a top of the first film strand 8th be. The contact page 28 is referred to as such as it is with the matrix material 26 or later with the main strand 16 at least indirectly comes into contact. The same can be said for a contact side of the second film strand 12 be valid.

A further advantageous embodiment of the device 2 is in the 3 shown schematically. The device 2 from the 3 corresponds at least substantially to the device 2 from the 1 , Reference is made to corresponding explanations. The device 2 may alternatively or additionally a second application unit 46 exhibit. The to the 1 explained application unit 24 can then as the first application unit 24 be designated. The second application unit 46 can be used for continuous application of flowable, thermosetting matrix material 26 on a contact page 30 of the second film strand 12 be educated. Thus, also a contact page 30 of the second film strand 12 with flowable, thermosetting matrix material 26 be covered after the second foil strand 12 from the second film reel 10 is rolled off. On the preceding explanations, advantageous features and / or advantageous effects, as in connection with the first application unit 24 are explained in an analogous manner for the second application unit 46 reference.

The device 2 , as in the example 1 or 3 is shown, also has a guide unit 32 on. The leadership unit 32 is for continuously merging the first sheet strand 8th , the main strand 16 and the second film strand 12 to an endless entryway 36 educated. Here is the leadership unit 32 preferably designed such that the endless input strand 36 in a waling unit 34 to be led. The leadership unit 32 preferably has a plurality of pulleys 48 . 50 . 52 on. The first pulley 48 the leadership unit 32 may, for example, for guiding and / or deflecting the first film strand 8th be educated. The second pulley 50 the leadership unit 32 can preferably for guiding and / or deflecting the second film strand 12 be educated. A third deflection roller 52 can be used to guide and / or divert the main strand 16 be educated. In addition, pulleys 54 the rolling unit 34 the leadership unit 32 be assigned. The leadership unit 32 , and in particular the pulleys 48 . 50 . 52 the leadership unit 32 , Thus, may be adapted and / or arranged so that the first sheet strand 8th , the main strand 16 and the second foil strand 12 continuously to the endless input line 36 be merged. Here is the leadership unit 32 designed such that the endless input line 36 arises, in which the main strand 16 between the two film strands 8th . 12 is arranged. At the endless entrance train 36 therefore cover the contact page 28 of the first film strand 8th at least indirectly, a first outside 36 of the main strand 16 , Also covered at the endless entryway 36 the contact page 30 of the second film strand 12 at least indirectly, a second, to the first outside 36 of the main strand 16 opposite arranged outside 38 of the main strand 16 ,

In addition, the device 2 the waling unit 34 on. The waling unit 34 is for continuously walking the endless input train 36 to an endless process strand 40 educated. Each of the two foil strands 8th . 12 is doing by means of the waling unit 34 on the main strand 16 pressed and / or pressed. The walking by means of the rolling unit 34 may therefore be due to compression, rolling, compression and / or compression of the input string 36 to the endless process strand 40 distinguished. As exemplified in the 1 or 3 is shown, the waling unit 34 For example, two groups, each with several pinch rollers 56 exhibit. The pinch rollers 56 a corresponding first group and the pinch rollers 56 The further group may for example be arranged in such a way to each other that the process strand 40 in the process direction P continuously compressed and by the rolling unit 34 to be led. The waling unit 34 Therefore, it can be used for continuous walking of the endless process strand 40 be formed that the main strand 16 with the matrix material 26 is completely impregnated, the first film strand 8th the first outside 36 of the main strand 16 completes and the second foil strand 12 the second outside 38 of the main strand 16 concludes. With the conclusion is preferably meant that the respective film strand 8th . 12 the endless fiber mat strand 18 and the respective fiber networks 20 of the main strand 16 as well as the intended for impregnation matrix material 26 covered to a top and a bottom completely. The waling unit 34 is through continuous walking and providing the forged, endless process strand 40 educated. In addition, the waling unit 34 for continuously outputting the flexed process string 40 as an endless product strand 4 , preferably in a process direction P, is formed.

The device 2 , as in the example 1 and 3 is shown schematically, offers the advantage that the two film strands 8th . 12 and the main strand 16 making the fiber mat strand 18 with the fiber nets applied to it 20 has, continuously as an endless input line 36 in the waling unit 34 can be performed, in which then the complete impregnation of the main strand 16 with the matrix material 26 he follows. The matrix material 26 can thereby of one or both foil strands 8th . 12 to be provided. By the continuous merging by means of the guide unit 32 and continuous walking by means of the rolling unit 34 can then be the continuously produced and endless product strand 4 getting produced. The Alignment of the fiber nets 20 on the fiber mat strand 18 is doing by the device 2 not or at least substantially unchanged. Rather, the orientation of the fiber nets 20 on the fiber mat strand 18 also for the process strand 40 and / or for endless product strand 4 (at least essentially) maintained. This can be a product strand 4 be prepared in the fibers of the fiber mat strand 18 and continuous fibers of the fiber nets 20 are arranged particularly accurate and predeterminable. In addition, the correspondingly continuous production of the endless product strand allows 4 a particularly fast and process-economical production of the product strand 4 ,

As it has proven advantageous when the device 2 a product coil 58 having. The product coil 58 can be designed for continuous winding of the product strand 4. Becomes the endless product strand 4 So for example, continuously from the Walkeinheit 34 can then output by means of the product coil 58 a continuous winding of the endless product strand 4 respectively. For this purpose, the product coil 58 be formed accordingly. When winding up the product strand 4 on the product coil 58 is through the foil strands 8th . 12 effectively prevents it from sticking between the individual turns of the wrapped product strand 4 comes. It is particularly preferred that the film strands 8th . 12 are each formed such that they do not or at least substantially not, in particular not materially, adhere to each other. For this purpose, the outer side of a respective coil strand arranged opposite to a contact side may be formed. Is the product strand 4 completely manufactured and on the product coil 58 completely rolled up, so can the wrapped product strand 4 by means of the product coil 58 especially easy to use for further purposes. So can the product coil 58 with the wound up product strand 4 then used to remove from the product strand 4 to produce a plurality of end products.

Furthermore, it has proved to be advantageous if the device 2 a first sensor 60 has. A corresponding, first sensor 60 is schematic in the 3 shown. The first sensor 60 can, for example, for contactless detection of the main strand 16 be educated. The first sensor 60 For example, it may be an optical sensor. However, it is also possible that the sensor 60 based on another non-contact detection technique for detection, in particular of the main line 16 , is trained. In addition, the first sensor 60 also be arranged at a different location, so that the first sensor 60 for example, or alternatively for detecting the first film strand 8th , the second foil strand 12 and / or the input string 36 is formed and / or arranged. In addition, the first sensor 60 preferably configured and / or configured to provide a first sensor signal. The first sensor signal is based on the contactless detection, in particular of the main line. The first sensor signal can thus represent the at least one detected strand.

The non-contact detection can relate, for example, to the shape of a detected fiber network, to the orientation of a detected fiber network, to the height of a detected fiber network and / or to the height of the detected main strand. Is the first sensor 60 For example, designed and / or arranged such that the first sensor 60 to capture the input string 36 serves, so the non-contact detection, for example, and / or alternatively to the height of the first film strand including possibly applied matrix material and / or on the height of the second film strand 12 optionally including the applied matrix material. The first sensor 60 can therefore for the detection of variables, in particular geometric sizes, of the main strand 16 , the at least one foil strand 8th . 12 and / or the input string 36 Respectively.

In addition, it has proved to be advantageous when the device 2 a control unit 62. An appropriate control unit 62 is schematic in the 3 played. The first sensor unit 60 can by means of a signal connection with the control unit 62 be connected, so that the first sensor signal from the first sensor 60 to the control unit 62 is transferable. The control unit 62 can be designed to evaluate the first sensor signal. This can be used to monitor the device 2 and / or serve the at least one strand. An advantageous embodiment of the control unit 62 is characterized by the fact that the control unit 62 based on the first sensor signal for controlling the rolling unit 34 and / or the at least one application unit 24 . 46 is trained. The at least one application unit 24 . 46 and / or the waling unit 34 can each by means of a control line with the control unit 62 be connected. This allows control of the at least one application unit 24 . 46 or the waling unit 34 by means of the control unit 62 ,

For example, by means of the first sensor 60 the height of one on the sensor 60 Passed fiber network 20 detected, this can be done by the first sensor signal to the control unit 62 which then controls the at least one output unit 24, 46 to ensure that the main string 16 comprising the fiber mat strand 18 with the multitude of fiber networks 20 in the waling unit 34 is completely impregnated. For example, the first application unit 24 based on the first control signal by means of the control unit 62 be controlled so that more or less matrix material 26 on the contact page 28 of the first film strand 8th is applied, so that the desired amount of matrix material 26 with the previously by means of the first sensor 60 covered fiber network 20 comes in contact, which then the desired, complete impregnation of the main strand 16 in the area with the aforementioned, registered fiber network 20 guaranteed. In addition, the control unit 62 the waling unit 34 for example, controlling a desired pressure on the process string based on the first sensor signal 40 is exercised, so that this also supports the desired impregnation and / or at least partially mitgewährleistet.

In the 4 is a further advantageous embodiment of the device 2 shown in a schematic view. This device 2 at least substantially corresponds to the devices already explained 2 from the 1 and 3 , As far as it makes sense, reference is therefore made to the preceding explanations in an analogous manner. The device 2 from the 4 also has a control unit 62 on. This can be, for example, the control unit 62 be as related to the 3 has been discussed. However, it is also possible that this is another control unit 62 is. For the sake of simplicity, the control unit 62 from the 4 as a control unit 62 designated. The control unit 62 is for example by means of a signal line connection to a second sensor 64 connected. The second sensor 64 is preferably also a part of the device 2 , The second sensor 64 is for contactless detection of the product strand 4 educated. Based on the detected product strand 4 is the second sensor 64 preferably designed to provide a second sensor signal, which then detects the detected product strand 4 represents. The control unit 62 can based on the second sensor signal monitoring, in particular of predetermined geometric and / or physical properties of the product strand 4 , To run. Preferably, the control unit 62 based on the second control signal for controlling the rolling unit 34 and / or the at least one application unit 24 educated. The control unit 62 can do this with the at least one application unit 24 and / or the waling unit 34 be connected by means of a respective control signal line.

Particularly preferred, the device 2 also a separation unit 66 on. The separation unit 66 is for cutting off an end section 68 of the product strand 4 educated. This is preferably an end section seen in the process direction P. 68 of the product strand 4 , The separation of an end section 68 can be repeated by means of the separation unit 66 be executed. The separation unit 66 can be designed accordingly. So it is repeated an end section 68 by means of the separation unit 66 from the product strand 4 separated, so can the separated end sections 68 in a receptacle 70 to be collected. The device 2 can the receptacle 70 exhibit. The receptacle 70 is preferably a replaceable receptacle 70 , So is the separation unit 66 used to a corresponding plurality of end portions 68 it is preferably provided that the product strand 4 not on a product coil 58 being rolled up. Rather, the end sections 68 in said receptacle 70 to be collected. Because the waling unit 34 the product strand 4 continuously dispenses, the product strand moves accordingly in the process direction P, so that the separation of the end portion 68 by means of the separation unit 66 time and / or signal controlled can be done. It is preferably provided that the separation unit 66 by means of a control line with the control unit 62 connected is. The separation unit may be controlled by the control unit 62. For this purpose, the control unit is preferably designed and / or configured.

Furthermore, it is preferably provided that the separation unit 66 for repeatedly separating an end section 68 along a cutting line 72 between two adjacent fiber networks 20 of the product strand 4 is formed, so that each end section 68 at least one integrated fiber network 20 having.

In the 5 is a section of the product strand 4 in a semitransparent and schematic plan view reproduced. Here are the two foil strands 8th . 12 and the matrix material 26 be considered transparent. The product strand 4 So has the fiber mat strand 18 and the plurality of fiber nets 20 on. The fiber nets 20 are arranged, in particular in groups, one behind the other in the longitudinal direction L, which, as shown in 4 to recognize, preferably with the process direction P corresponds. The cutting line 76 extends in the transverse direction Q, preferably in such a way that they each adjacent fiber networks 20 not destroyed. By means of the separation unit 66 can also have multiple end sections 68 simultaneously from the product strand 4 be separated. In the 5 For example, the right-hand end portions 68 along the dashed lines shown 76 by means of the separation unit 66 from the product strand 4 severable. Each of the end sections 68 then assigns a fiber network 20 on.

In principle, however, it is also possible that an end section 68 also several fiber networks 20 having.

As previously explained, the product strand 4 by means of the second sensor 64 be detected contactless to a corresponding second sensor signal to the control unit 62 transferred to. The control unit 62 may be based on the second sensor signal for controlling the separation unit 66 be educated. For example, by means of the second sensor, the position of the fiber networks 20 and / or the fiber net free sections between two adjacent fiber networks 20 to determine the separation unit based thereon 66 to control such that the at least one end portion 68 along a cutting line 76 between two adjacent fiber networks of the product strand 4 is separated.

The severed end sections 68 can then in a further process step and / or by means of a further unit of the device 2 used to make a final product. This can be the end section 68 be placed in a molding press, then to produce by means of a Heizpressverfahrens a correspondingly shaped end product, in which the matrix material of the respective end portion 68 is fully cured, and wherein the molding press shape the corresponding shape of the final product. The molding press may be part of the device 2 form. In addition, the method can be designed in an analogous manner.

In the following, advantageous embodiments of the method will be discussed. In order to avoid repetition, reference is made to the preceding explanations, preferred embodiments, preferred features, preferred effects and / or advantages in an analogous manner and as far as it makes sense with respect to the advantageous embodiments of the method, as they are for the advantageous embodiments of the device 2 have been discussed.

An advantageous embodiment of the method for producing a product strand 4 is in the 6 shown schematically. The method has at least the following steps a) to f): According to step a), a first, endless film strand 8th provided. According to step b) becomes a second, endless film strand 12 provided. According to step c) becomes an endless main strand 16 provided an endless fiber mat strand 18 and a plurality of preformed fiber nets 20 having, spaced from each other, one behind the other on a first outer side 22 of the fiber mat strand 18 attached and each formed by continuous fibers, wherein a contact side 28 of the first film strand 8th , a contact page 30 of the second film strand 12 and / or the fiber mat strand 18 with flowable, thermosetting matrix material 26 is covered or is. According to step d) becomes the first film strand 8th , the main strand 16 and the second foil strand 12 in a waling unit 34 to an endless entryway 36 merged continuously, taking in the endless input train 36 the contact page 28 of the first film strand 8th a first outside 36 of the main strand 16 and the contact page 30 of the second film strand 12 a second, to the first outer side 36 of the main strand 16 opposite arranged outside 38 of the main strand 16 cover. According to step e) becomes the endless input line 36 by means of the rolling unit 34 to an endless process strand 40 continuously rolled, wherein in the process strand 40 of the main strand 16 with the matrix material 26 completely impregnated, the first film strand 8th the first outside 36 of the main strand 16 completes and the second foil strand 12 the second outside 38 of the main strand 16 concludes. In accordance with step f), the processed process string is processed 40 as an endless product strand 4 from the waling unit 34 continuously issued.

In the 7 a further advantageous embodiment of the method is shown schematically, wherein the method comprises the above-described steps a) to f) and a further step g1). With regard to the steps a) to f), reference is made to the preceding explanations. In step g1), the product strand becomes 4 on one as a product coil 58 designated coil continuously rolled up.

A further advantageous embodiment of the method is in 8th schematically reproduced, the method to 6 explained steps a) to f) and wherein reference is made to the corresponding explanations in an analogous manner. The method further comprises step g2). In accordance with step g2), an end section is seen, in particular in the process direction P 68 of the product strand 4 along a cutting line 76 between two fiber networks 20 of the product strand 4 by means of a separation unit 66 repeatedly severed so that each end section 68 at least one fiber network integrated therein 20 having.

A further advantageous embodiment of the method is in 9 schematically reproduced, the method to 6 explained steps a) to f) and wherein reference is made to the corresponding explanations in an analogous manner. The method also has the steps h) and i). According to step h) is a determination of a first sensor signal by contactless detection of the main strand 16 , the first film strand 8th , the second foil strand 12 or the input string 36 intended. According to step i), a control of the rolling unit 34 and / or the at least one application unit 24 . 46 provided based on the first sensor signal.

A further advantageous embodiment of the method is in 10 schematically reproduced, the method to 6 explained steps a) to f) and wherein reference is made to the corresponding explanations in an analogous manner. The method further comprises steps j) and k). According to step j), a determination of a second sensor signal by contactless detection of the product strand 4 intended. According to step k), controlling the rolling unit 34 is the at least one application unit 34 . 46 and / or the separation unit 66 provided based on the second sensor signal.

In addition, it should be noted that "having" does not exclude other elements or steps, and "a" or "an" does not exclude a plurality. It should also be appreciated that features described with reference to any of the above embodiments may also be used in combination with other features of other embodiments described above. Reference signs in the claims are not to be considered as limiting.

Claims (15)

Method for producing a product strand (4), comprising the steps: a) providing a first endless film strand (8); b) providing a second, endless sheet strand (12); c) providing an endless main strand (16) comprising an endless strand of fiber mat (18) and a plurality of preformed fiber nets (20) spaced apart from each other, secured one behind the other on a first outer surface (22) of the fiber strand (18) and each of continuous filaments wherein a contact side (28) of the first film strand (8), a contact side (30) of the second film strand (12) and / or the fiber mat strand (18) is or is covered with a flowable, thermosetting matrix material (26); d) continuously merging the first film strand (8), the main strand (16) and the second film strand (12) in a rolling unit (34) to an endless input strand (36), wherein the contact side (28) of the first film strand (8) a first outer side (36) of the main strand (16) and the contact side (30) of the second foil strand (12) cover a second, on the first outer side (36) of the main strand (16) opposite arranged outside (38) of the main strand (16) ; e) continuously turning the endless input strand (36) by means of the rolling unit (34) into an endless process strand (40) in which the main strand (16) is completely impregnated with the matrix material (26), the first film strand (8) the first outer surface (36) of the main strand (16) terminates and the second foil strand (12) terminates the second outer side (38) of the main strand (16); and f) Continuously outputting the rolled process strand (40) as an endless product strand (4) from the rolling unit (34). Method according to the preceding claim, characterized by a continuous rolling of the product strand (4) on a coil called a product coil. Method according to Claim 1 characterized by repeatedly severing an end portion (68) of the product strand (4) along a cutting line (76) between two fiber nets (20) of the product strand (4) by means of a severing unit (66) so that each end portion (68) comprises at least one therein integrated fiber network (20). Method according to one of the preceding claims, characterized in that each fiber network (20) by means of an elastomer and / or a thermoplastic on the fiber mat strand (18) is attached. Method according to one of the preceding claims, characterized in that each fiber network (20) by means of an elastomeric thread and / or by means of a thermoplastic thread on the fiber mat strand (18) is sewn. Method according to one of the preceding claims, characterized by at least one of the following steps c.1) to c.3): c.1) continuous application of matrix material (26) to the contact side (28) of the first film strand (8) by means of a first Applying unit (24) before continuous merging according to step d); c.2) continuously applying matrix material (26) to the contact side (30) of the second film strand (12) by means of a second application unit (46) prior to the continuous merging according to step d); c.3) continuous application of matrix material (26) to the main strand (16) by means of a third application unit prior to the continuous assembly according to step d). Method according to one of the preceding claims, characterized by a determination of a first sensor signal by contactless detection of the main strand (16), the first foil strand (8), the second foil strand (12) or the input strand (36); and controlling the Whip unit (34) and / or the at least one application unit (24, 46) based on the first sensor signal. Method according to one of the preceding claims, characterized by a determination of a second sensor signal by contactless detection of the product strand (4); and controlling the swivel unit (34), the at least one application unit (24, 46) and / or the separation unit (66) based on the second sensor signal. Device (2) for producing a product strand (4), comprising: - A first film reel (6) for providing a first, endless sheet strand (8); - A second film reel (10) for providing a second, endless sheet strand (12); a main unit (14) for providing an endless main strand (16) comprising an endless fiber mat strand (18) and a plurality of preformed fiber nets (20) spaced from one another on a first outer side (22) of the fiber mat strand (18) attached and each formed by continuous fibers; - An application unit (24, 46) for continuously applying flowable, thermosetting matrix material (26) on a contact side (28) of the first film strand (8), on a contact side (30) of the second film strand (12) or on the main strand (16) is formed; - A guide unit (32) for continuously merging the first sheet strand (8), the main strand (16) and the second film strand (12) in a rolling unit (34) to an endless input strand (36) is formed, wherein the contact side (28) of the first film strand (8) has a first outer side (36) of the main strand (16) and the contact side (30) of the second film strand (12) has a second outer side opposite the first outer side (36) of the main strand (16) Cover (38) of the main strand (16); and - the rolling unit (34), which is designed for continuous casting of the endless input strand (36) to form an endless process strand (40) in which the main strand (16) is completely impregnated with the matrix material (26), the first film strand (8) the first outer side (36) of the main strand (16) terminates and the second foil strand (12) closes off the second outer side (38) of the main strand (16); wherein the rolling unit (34) for continuously discharging the rolled process string (40) is formed as an endless product strand (4). Device (2) according to the preceding claim, characterized in that the guide unit (32) has a plurality of deflection rollers (48, 50, 52) for guiding the first film strand (8), the second film strand (12) and / or the main strand (16). having. Device (2) according to one of the preceding Claims 9 to 10 , characterized in that the device (2) comprises a first sensor (60) for non-contact sensing of the main strand (16), the first film strand (8), the second film strand (12) or the input strand (36) and for providing a first sensor signal based on the detected strand is formed; and the device (2) comprises a control unit (62) formed based on the first sensor signal for controlling the swivel unit (34) and / or the application unit (24, 46). Device (2) according to one of the preceding Claims 9 to 11 characterized by a severing unit (66) adapted to repeatedly sever an end portion (68) of the product strand (4) along a cutting line (76) between the fiber webs (20) of the product strand (4) such that each end portion (68) has at least one integrated fiber network (20). Device (2) according to one of the preceding Claims 9 to 12 characterized in that the device (2) comprises a second sensor (64) adapted for contactless sensing of the product strand (4) and for providing a second sensor signal based on the detected product strand (4); and the device (2) comprises a control unit (62) formed based on the second sensor signal for controlling the roll unit (34), the application unit (24, 46) and / or the separation unit (66). Device (2) according to one of the preceding Claims 9 to 13 characterized in that the main unit (14) comprises a fiber spool (42) for providing the main strand (16). Device (2) according to one of the preceding Claims 9 to 13 characterized in that the main unit (14) comprises a fiber strand spool for providing the fiber mat strand (18) and a sewing unit; wherein the sewing unit is adapted to repeatedly and successively sew a fiber net (20) onto the endless fiber mat strand (18) unwound continuously from the fiber strand bobbin, so that an endless main strand (16) of the endless fiber mat strand (18) with a plurality of fiber nets (18) 20) is formed, which are spaced from each other, mounted one behind the other on a first outer side (36) of the fiber mat strand (18) and each formed of continuous fibers.

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