DE102015208221A1 - Process for producing a fiber-plastic composite, fiber-plastic composite and apparatus for producing a fiber-plastic composite - Google Patents

Abstract

The invention relates to a method for producing a fiber-plastic composite, a fiber-plastic composite, a final product, an apparatus for producing a fiber-plastic composite and a use of the fiber-plastic composite.

Description

The invention relates to a method for producing a fiber-plastic composite, a fiber-plastic composite, a final product, an apparatus for producing a fiber-plastic composite and uses of the fiber-plastic composite.

Fiber-plastic composites (FKV) are now regarded as established construction materials in numerous fields of practical application. Depending on the fibers and plastics, composites with variable, product- and application-adapted property profiles can be provided.

It is known to combine textile semi-rigid semi-finished products with a thermoplastic matrix material to fiber-plastic composites. The thermoplastic matrix material can in this case be used in the form of granules, powders or films. As semi-finished textile fabrics are typically used. Tissues have the advantage that, in contrast to alternative products, they do without additional auxiliary components. The production-related biaxial structure of fabrics, however, provides for a reduction in flexibility in the construction of a layer structure and thus limits the possible combinations of the layers for optimal alignment of the fibers in the loading direction. Only by using the finest warp threads, an approximately unidirectional alignment can be achieved. However, the crossing of weft and warp threads ensures in each case an undulating position of the fiber ribbons, which leads to a loss of strength in the finished fiber-plastic composite ( Cherif, Ch .: Textile Materials for Lightweight Construction: Techniques - Processes - Materials - Properties; Springer-Verlag Berlin, Heidelberg, 2011 ).

Another possibility for the production of fiber-plastic composites is to combine in a two-stage process pliable semi-finished textile products with bi- or multi-directional reinforcement direction with spunbonded nonwovens as a thermoplastic matrix. Due to the multi-stage structure, however, only individual layer thicknesses of up to 0.8 mm are achieved, so that this production technique is not suitable for further processing into thin-layer laminates ( Högemann, W .: Reifenhäuser Reicofil is developing a rollable alternative to organic sheet, www.reifenhauser.com/en/news/reifenhaeuser_reicofil_developed_a_rollable_alternative_to_mm_organoblech, Press Release dated 02.07.2013 ).

Thermoplastic fiber-plastic composite semi-finished products (FKV semi-finished products) in the form of foil-shaped unidirectional tapes (UD tapes) are processed from parallel processing of several rovings into a strip with homogeneous filament distribution ( Company Presentation TeXtreme®: "UD Tapes". http://www.textreme.com/b2b/products/ud-tapes ; Kausch, M .; Kroll, L .; Heinrich, HJ .: Thermoplastic prepregs for the high-performance sector. Proceedings of the 12th Chemnitzer Textiltechnik Conference 2009, pp. 250-256 ; Vettermann, F .; Wegner, A .: Fiber spreading system for the production of dry UD materials. Proceedings of the 13th Chemnitzer Textiltechnik Conference 2012, pp. 273-256 ). Typical textile fluctuations in the feeding, spreading and thread arrangement of the parallel rovings can lead to irregularities in the storage. In order to ensure a seamless sequencing of each roving, enormous demands must be made on the precision of the processing technology, such as thread guide and spreading device.

Textile-based, unidirectionally reinforced composite semi-finished products are also processed by parallel processing of multiple rovings into one surface. In addition, a sewing thread is required as a binder. The associated demands on feeding and laying technology are comparable to the expenses in the production of the above-mentioned UD tapes.

Task and solution

The present invention is therefore based on the object, methods for producing a fiber-plastic composite, in particular in the form of a semi-finished product, which circumvents the disadvantages mentioned above. In particular, the present invention has for its object to provide a method for producing a fiber-plastic composite, which can be further processed in particular to thin-film laminates. Furthermore, it is an object of the present invention to provide a fiber-plastic composite, a final product and an apparatus for producing a fiber-plastic composite.

This object is achieved by a method having the features of independent claim 1 and by a method according to independent claim 9. Preferred embodiments of the method are defined in the dependent claims 2 to 8 and 10. The wording of all claims is hereby incorporated by express reference into the content of the present specification. Other subjects of the invention, which solve the problem underlying the invention are disclosed in the description.

According to a first aspect, the invention relates to a method for producing a fiber-plastic composite (FRP).

• – Bereitstellen von lediglich einem Verstärkungsfaserroving,
• – Spreizen des Verstärkungsfaserrovings und
• – Wickeln, insbesondere Spiralwickeln, des gespreizten Verstärkungsfaserrovings auf oder um eine Kunststoffmatrix, welche auf einen Wickelkern aufgebracht, insbesondere auf oder um einen Wickelkern gewickelt, ist.

The method comprises the following steps:

• Providing only one reinforcing fiber roving,
• - Struts of reinforcing fiber roving and
• - Winding, in particular spiral wound, the spread Verstärkungsfaserrovings on or about a plastic matrix which is applied to a winding core, in particular wound on or around a winding core is.

The inventive method according to the first aspect of the invention is distinguished over generic method in that only one Verstärkungsfaserroving is used to produce a fiber-plastic composite. As a result, the risks as well as the technical complexity, which are associated with the spreading, feeding and depositing of a plurality of rovings on a winding core or on a matrix which is deposited on a winding core, can be reduced with particular advantage. The inventive method has the particular advantage that it allows a variable size production of particular large-scale fiber-plastic composites in only one processing step. This in turn reduces the expense of further processing into finished products, such as thin-film laminates.

The term "fiber-plastic composite" defined in accordance with the present invention in accordance with the expert understanding of a material which has so-called reinforcing fibers and a plastic matrix. The matrix surrounds the fibers which are bonded to the plastic matrix by adhesive or cohesive forces. The fibers conduct the forces. Due to their high rigidity compared to the plastic matrix, they attract the load. The plastic matrix embeds the fibers. In this context, Betten means that the plastic matrix spatially fixes the fibers and allows the load to be transferred and released. In addition, the plastic matrix supports the fibers, for example against buckling with fiber-parallel pressure. The load transfer is usually via an adhesion between the fibers and the plastic matrix. It can be done by normal or shear forces. The plastic matrix also has the task of protecting the fibers against environmental influences.

The term "reinforcing fiber" in the sense of the present invention, in accordance with the understanding of the art, defines a fiber which has a higher elastic modulus in the longitudinal direction as well as a greater tensile strength and usually also a lower elongation at break than the plastic matrix.

The term "reinforcing fiber roving" for the purposes of the present invention defines an endless reinforcing fiber strand, i. a strand comprising or containing reinforcing fibers in the form of bundled filaments. The reinforcing fibers of the reinforcing fiber roving preferably have a length of> 50 mm, in particular a length of at least 1000 mm in length.

For the purposes of the present invention, the term "spiral winding" can-depending on the design of the winding core-mean that the reinforcing fiber roving is spirally or helically, i. helical, is wound.

The term "spreading" used in the context of the reinforcing fiber roving in the context of the present invention means that the arrangement, in particular the number, of the fibers / filaments of the reinforcing fiber roving in the direction transverse to the conveying direction, in particular in the widthwise extension of the reinforcing fiber roving, is increased / increased. In other words, spreading in the sense of the present invention means that a reinforcing fiber roving is brought to a cross section which is larger in width and smaller in thickness than the unextended reinforcing fiber roving. For example, from a reinforcing fiber roving with a cylindrical, in particular circular cylindrical, cross-section during spreading a Verstärkungsfaserroving with a band-shaped cross-section. The widening is achieved by distributing the fibers / filaments of the roving in the width direction of the roving, the result being ideally that a fiber layer (filament layer) is obtained in which all fibers are preferably exclusively parallel to each other.

According to a particularly preferred embodiment, the fiber-plastic composite to be produced is a fiber-plastic composite semi-finished product (semifinished FRP), which is particularly suitable for the production of thermoplastic fiber-plastic composite laminates (FRP laminates), preferably thermoplastic fiber-plastic composite thin-film laminates (FKV thin-film laminates), is usable.

In a reinforcement advantageous embodiment, the reinforcing fiber roving is a non-thermoplastic reinforcing fiber roving, i. a roving which does not comprise thermoplastic reinforcing fibers or consists of non-thermoplastic reinforcing fibers.

According to an alternative embodiment, the reinforcing fiber roving is a thermoplastic reinforcing fiber roving, ie a roving comprising thermoplastic reinforcing fibers or consisting of thermoplastic reinforcing fibers. The use of such a reinforcing fiber roving makes it particularly advantageous to bond and / or solvent-free bonding (joining) of expanded reinforcing fiber roving and plastic matrix. In particular, the reinforcing fiber roving may perform the function of an adhesive component in this embodiment.

In order not to impair the reinforcing function of the fiber roving, it can be provided according to the invention in particular that the reinforcing fiber roving is a thermoplastic reinforcing fiber roving which has a higher melting point than the plastic matrix.

According to the invention, it may further be possible for the reinforcing fiber roving to comprise or consist of thermoplastic reinforcing fibers which have a higher melting point than the plastic matrix and non-thermoplastic reinforcing fibers.

The embodiments described in the two preceding paragraphs have the particular advantage that the reinforcing function of the fibers is not impaired if energy, preferably thermal energy, is introduced for the purpose of connecting reinforcing fiber roving and plastic matrix.

The reinforcing fiber roving, in another embodiment, comprises reinforcing fibers or consists of reinforcing fibers selected from the group consisting of inorganic fibers, metal fibers, organic fibers such as polymer fibers, natural fibers, and combinations thereof.

The reinforcing fiber roving is in a further embodiment selected from the group consisting of glass fiber roving, mineral fiber roving, basalt fiber roving, boron fiber roving, silica fiber roving, carbon fiber roving, aramid fiber roving, polyester fiber roving, polyamide fiber roving such as nylon fiber roving, polyethylene fiber roving, plexiglass fiber roving, wood fiber roving, flax fiber roving, hemp roving, Jute roving, kenaffa roving, ramie roving, sisal fiber roving and combinations thereof. In other words, in a further embodiment, the reinforcing fiber roving comprises reinforcing fibers or consists of reinforcing fibers selected from the group consisting of glass fibers, mineral fibers, basalt fibers, boron fibers, silica fibers, ceramic fibers, steel fibers, carbon fibers, aramid fibers, polyester fibers, polyamide fibers such as Nylon fibers, polyethylene fibers, plexiglass fibers, wood fibers, flax fibers, hemp fibers, jute fibers, kenaf fibers, ramie fibers, sisal fibers, and combinations thereof.

The reinforcing fiber roving, in another embodiment, has a fineness ≦ 4800 tex, in particular from 68 tex to 2400 tex, preferably 200 tex to 1200 tex. For the purposes of the present invention, the term "fineness" is to be understood to mean a length-related weight of the reinforcing fiber roving. The unit 1 tex means a weight of 1 gram per 1000 meters roving length.

In a preferred embodiment, the reinforcing fiber roving during spreading receives a band-shaped, preferably fiber-band-shaped, structure. The band-shaped structure preferably has parallel juxtaposed filaments or endless filaments.

In the spreading, the width of the reinforcing fiber roving is preferably 2 to 20 times, in particular 2.5 to 10 times, preferably 4 to 8 times, particularly preferably 3 to 6 times increased the unspread reinforcing fiber roving.

The reinforcing fiber roving, in particular the expanded reinforcing fiber roving, is processed in a further embodiment at a speed of 0.3 m / min to 30 m / min, in particular 1 m / min to 15 m / min, preferably 3 m / min to 9 m / min ,

In an expedient embodiment, the plastic matrix is present as a flat material or flat fabric or as a two-dimensional plastic matrix. For the purposes of the present invention, the term "two-dimensional plastic matrix" defines a plastic matrix which has a significantly greater dimension in two of its dimensions, preferably its length and width, than in its third dimension, preferably its height or thickness.

Preferably, the plastic matrix is strip-shaped, in particular quadrangular, preferably rectangular, formed.

In principle, the plastic matrix may be a non-thermoplastic plastic matrix.

According to a particularly preferred embodiment, however, the plastic matrix is a thermoplastic Plastic matrix. The use of a thermoplastic polymer matrix makes it possible with particular advantage to bind (or join) reinforcing fiber roving and a plastic matrix without binding and / or solvent. With particular advantage, the plastic matrix in this embodiment can take over the function of an adhesive component.

In the case of a thermoplastic reinforcing fiber roving, a thermoplastic resin matrix preferably has a lower melting point than the reinforcing fiber roving. In this embodiment, therefore, the plastic matrix assumes the function of an adhesive component.

Preferably, the plastic matrix comprises a thermoplastic material or consists of a thermoplastic material, which is preferably selected from the group consisting of polypropylene (PP), polyamides (PA), polyetheretherketone (PEEK), polyphenylene sulfide (PPS), polysulfone (PSU), polyetherimide (PEI), polytetrafluoroethylene (PTFE), thermoplastic polyurethane (TPU), polyethylene terephthalate (PET), polyethylene (PE), and combinations thereof.

In a particularly preferred embodiment, the reinforcing fiber roving is a non-thermoplastic reinforcing fiber roving or a reinforcing fiber roving having a higher melting point than the plastic matrix and the plastic matrix is a thermoplastic resin matrix.

The plastic matrix is open-pored in a further embodiment. Preferably, the plastic matrix has pores in the micrometer range. An open-pored design of the plastic matrix offers the advantage of a significantly better degassing capability in a further processing of the fiber-plastic composite to be produced, in particular in a further processing to single-layer or multi-layer FKV thin-layer laminates. In contrast to the thermoplastic films known from the prior art, an open-pored and therefore open-diffusion formation of the plastic matrix does not constitute a barrier to the escape of the air contents generally contained in fiber-plastic composites, thereby avoiding air pockets and producing homogeneous fiber-plastic composites can. The associated with an open-pored design of the plastic matrix surface enlargement also has the advantage that the surface can be melted faster in the case of a thermoplastic matrix, which can significantly reduce the process times for establishing a connection between the reinforcing fiber roving and the plastic matrix.

In a further embodiment, the plastic matrix has a weight per unit area of 3 g / m ² to 900 g / m ² , in particular 10 g / m ² to 500 g / m ² , preferably 20 g / m ² to 150 g / m ² .

In a further embodiment, the plastic matrix has a textile structure or is in the form of a textile structure.

According to the invention, it is particularly preferred if the plastic matrix is a textile plastic matrix, i. the plastic matrix is in the form of a textile structure.

The textile structure mentioned in the two preceding paragraphs is preferably selected from the group consisting of nonwoven fabric, felt, fleece, scrim, knitted fabric, knitted fabric, braid and fabric.

The plastic matrix preferably has a nonwoven or is in the form of a nonwoven.

The plastic matrix particularly preferably has a nonwoven fabric or is in the form of a nonwoven fabric.

According to a particularly preferred embodiment, the plastic matrix is a thermoplastic and fleece-shaped, in particular nonwoven-shaped, plastic matrix. For example, the plastic matrix may be a nonwoven fabric of polyamide or polypropylene.

The winding core can basically have any desired prismatic shape, which can be offset by the fixing of a rotation axis on the winding core in a required for the winding process rotating movement.

Preferably, the winding core is a rotationally symmetrical or substantially rotationally symmetrical winding core.

The winding core is particularly preferably a cylindrical or substantially cylindrical, in particular circular-cylindrical or substantially circular-cylindrical, winding core.

In a further embodiment, the winding core is a solidly configured winding core, i. around a winding core without a cavity.

In an alternative embodiment, the winding core is a hollow-body-shaped, in particular hollow-cylindrical, preferably hollow cylindrical, winding core. For example, the winding core may be a tubular or tubular winding core.

The winding core can furthermore be a reusable winding core. For example, the winding core may be divided so that it can be removed from the mold after production of a fiber-plastic composite.

Alternatively, the winding core may be a so-called lost winding core. Such a core may consist of either soluble or washable core materials.

Alternatively, the winding core may consist of a wrapping material with a low bulk density, for example of a foam. Such a winding core has the advantage that it can remain in a manufactured fiber-plastic composite.

Alternatively, the winding core of metal or a metal alloy, in particular steel exist.

The winding core is preferably configured roller-shaped or is preferably in the form of a roller.

In a preferred embodiment, the plastic matrix is applied in web form to the winding core, in particular wound.

In a further embodiment, the plastic matrix is fixed by means of a mechanical, electrical or pneumatic clamping rail along the winding core length.

In principle, the plastic matrix can be applied in multiple layers to the winding core, in particular wound on or around the winding core. However, it is preferred according to the invention if the plastic matrix is single-layered, i. only in one layer, applied to the winding core, in particular wound on or around the winding core, is. This is particularly advantageous with regard to a further processing of the fiber-plastic composite to thin-film laminates with the smallest possible thickness of each laminate layer. In the case of a single-layer applied to the winding core, in particular wound on or around the winding core, the plastic matrix, the ends of the plastic matrix can be deposited shock on impact or partially overlapping on the winding core. The ends of the plastic matrix are preferably the narrow sides of a two-dimensional plastic matrix.

In an expedient embodiment, the expanded reinforcing fiber roving is secured to the winding core prior to winding. A fastening of the reinforcing fiber roving can be effected, for example, by means of a mechanical, electrical or pneumatic clamping device, wherein the clamping device is preferably a clamping device which can be lowered into the winding core.

According to a further embodiment, the spread reinforcing fiber roving is wound on or around the plastic matrix by means of a laying device that can be moved in the longitudinal direction of the winding core.

In a further embodiment, during the winding of the spread reinforcing fiber roving, longitudinal sections of the spread reinforcing fiber roving, preferably sequentially, are deposited on the plastic matrix.

During the winding of the spread reinforcing fiber roving, longitudinal sections of the spread reinforcing fiber roving are preferably laid side by side, in particular parallel to one another, on the plastic matrix.

Preferably, in winding the splayed reinforcing fiber roving, longitudinal portions of the splayed reinforcing fiber roving are piled up on the plastic matrix.

Basically, the expanded reinforcing fiber roving can be wound in multiple layers on or around the plastic matrix. However, it is preferred in accordance with the invention if the reinforcing fiber roving is single-ply, i. only in one layer, being wound on or around the plastic matrix. This is particularly advantageous with regard to a further processing of the obtainable by the process according to the invention fiber-plastic composite to thin-film laminates with the lowest possible thicknesses. In the case of a reinforcing fiber roving wound in one layer on or around the plastic matrix, the ends of the reinforcing fiber roving may be stacked on the plastic matrix butt or partially overlapping.

According to a particularly preferred embodiment, the spread reinforcing fiber roving is wound in the form of a mat, in particular unidirectional and preferably single-ply gel, on or around the plastic matrix.

In a further embodiment, during winding of the spread reinforcing fiber roving or after winding the spread reinforcing fiber roving (on or about the plastic matrix), the spread reinforcing fiber roving and the plastic matrix are preferably bonded together on the winding core to form a wound fiber-plastic composite.

For the purposes of the present invention, the term "wound fiber-plastic composite" should preferably be understood to mean a rotationally symmetrical fiber-plastic composite, in particular a tubular or hose-shaped design.

The joining of the spread reinforcing fiber roving and the plastic matrix can be carried out in particular without the use of a binder and / or solvent.

In principle, the joining of the spread reinforcing fiber roving and the plastic matrix can only be carried out locally, in particular only at certain points. An only local, in particular only selective, connecting reinforcing fiber roving and plastic matrix has the advantage that a required for this energy input and a concomitant material stress of Verstärkungsfaserroving and plastic matrix can be minimized. Significant impairment of their material-specific performance potential can be avoided.

In an alternative embodiment, the expanded reinforcing fiber roving and the plastic matrix are joined together over the entire surface.

In a further embodiment, to obtain a wound fiber-plastic composite, in particular the already-mentioned wound fiber-plastic composite, the spread reinforcing fiber roving and the plastic matrix are thermally, i. under heat, connected together. For this purpose, in principle, the reinforcing fiber roving (in the spread or non-spread state) and / or the plastic matrix, preferably the reinforcing fiber roving and the plastic matrix, can be heated. The heating can be carried out before, during or after the winding of the reinforcing fiber roving on or around the plastic matrix.

The heating of reinforcing fiber roving and / or the plastic matrix is carried out in another embodiment by means of a heating device. The heating device can be designed, for example, as a heating hood.

In an expedient embodiment, the heating device is a heating device movable transversely to the winding core. In the context of the present invention, a heating device which can be moved in the transverse direction to the winding core should preferably be understood to mean a heating device which, viewed in the conveying direction of the reinforcing fiber roving, is arranged behind the winding core and can be moved toward or away from the winding core.

In a further embodiment, the heating device is a heat radiator, in particular infrared radiator.

The heating device preferably has a heat radiation surface whose length corresponds at least to the length of the winding core. Preferably, the winding core is rotated at least once by 360 degrees about its own longitudinal axis during heating. In this way, a complete heating of the reinforcing fiber roving and the plastic matrix can be ensured. By means of such a heating device, it is particularly possible to heat the reinforcing fiber roving and / or the plastic matrix during winding or after winding the reinforcing roving on or around the plastic matrix.

A thermal bonding of the spread reinforcing fiber roving and the plastic matrix may in principle be based on (partial) melting of the reinforcing fiber roving and / or the plastic matrix, preferably only on (partial) melting of the plastic matrix, and then solidifying the reinforcing fiber roving and / or the plastic matrix, preferably a subsequent solidification only the plastic matrix, based.

In the case of a textile plastic matrix whose textile structure when joining reinforcing fiber roving and plastic matrix remains preferably at least partially, in particular largely preserved, so that the obtained fiber-plastic composite can be recorded, for example by means of needle grippers and kept safe during transport. In the case of selectively selectively intensified action of heat on a thermoplastic polymer matrix, a local, in particular selective, connection between the composite components (reinforcing fiber roving and plastic matrix) is created, which ensures the inclusion of precisely these connection points by means of vacuum grippers and thus the safe transport of the fiber-plastic composites ,

In another embodiment, at least one further plastic matrix is wound on or around the reinforcing fiber roving after the winding of the spread reinforcing fiber roving and, in particular, after a preferably cohesive joining of plastic matrix and reinforcing fiber roving on the winding core. The term "at least one further plastic matrix" in the sense of the present invention means a further plastic matrix or a multiplicity of further plastic matrices, ie two or more further plastic matrices. In this case, the plastic matrix, on or around which the spread reinforcing fiber roving is wound, and the at least a further plastic matrix basically be the same or different. According to the invention, it is preferable if both the plastic matrix, onto which or around which the expanded reinforcing fiber roving is wound, and the at least one further plastic matrix are in each case embodied in a thermoplastic and in particular textile, preferably nonwoven, form. For further details regarding possible embodiments of the at least one further plastic matrix, reference is made to the previous description.

The at least one further plastic matrix and the reinforcing fiber roving, according to a further embodiment during the winding or after the winding of the at least one further plastic matrix (on or around the wound Verstärkungsfaserroving) preferably cohesively and in particular binder and solvent-free on the winding core to obtain a wound fiber Plastic composite interconnected. The wound fiber-plastic composite obtained in this case has (at least) three layers, namely (at least) two plastic matrix layers and a layer therebetween, which is formed by the reinforcing fiber roving. Such a fiber-plastic composite facilitates a possible further processing of a finished product, preferably a thin-film laminate. On top of that, the at least one further plastic matrix protects against any loss of fibers of the reinforcing fiber roving.

Preferably, the at least one further plastic matrix and reinforcing fiber roving are thermally, i. under heat, connected together.

A thermal bonding of the at least one further plastic matrix and the reinforcing fiber roving can basically be based on a (partial) melting of the at least one further plastic matrix and / or the reinforcing fiber roving, preferably only on a (partial) melting of the at least one further plastic matrix, and then solidifying the at least a further plastic matrix and / or the reinforcing fiber roving, preferably based on a subsequent solidification of only the at least one further plastic matrix. For further features and advantages for joining the at least one further plastic matrix and the reinforcing fiber roving, reference is made to the embodiments for joining the reinforcing fiber roving and the plastic matrix on which the reinforcing fiber roving is wound. The statements made there apply mutatis mutandis to connecting the at least one further plastic matrix and the Verstärkungsfaserrovings.

In a further embodiment, the wound fiber-plastic composite described in the preceding embodiments is removed from the winding core. In the case of a multi-part, in particular two-part, formed winding core this can be done in that the winding core is removed from the mold after receiving the wound fiber-plastic composite.

In an alternative embodiment, the winding core, after receiving the wound fiber-plastic composite by washing, in particular dissolution, removed from the wound fiber-plastic composite.

In a further embodiment, the wound fiber-plastic composite is withdrawn from the winding core.

The wound fiber-plastic composite mentioned in the preceding embodiments, which is preferably a spirally wound fiber-plastic composite, may in principle already be the fiber-plastic composite to be produced according to the invention.

In a preferred embodiment, however, the wound fiber-plastic composite mentioned in the preceding embodiments is further processed. In other words, the wound fiber-plastic composite mentioned in the preceding embodiments is preferably only an intermediate product.

Preferably, the wound fiber-plastic composite mentioned in the preceding embodiments is moved along its longitudinal direction, i. along the winding core axis, cut to obtain a two-dimensional fiber-plastic composite, preferably cut open. The two-dimensional fiber-plastic composite is preferably the fiber-plastic composite to be produced according to the invention. The term "two-dimensional fiber-plastic composite" defined in the context of the present invention, a fiber-plastic composite, which in two of its dimensions, preferably its length and width, a significantly larger dimension than in its third dimension, preferably its height or Thickness. In other words, the method according to the invention is thus preferably a method for producing a two-dimensional fiber-plastic composite, in particular a two-dimensional fiber-plastic composite semifinished product (FRP semi-finished product).

Particularly preferably, the fiber-plastic composite to be produced is a unidirectionally endless-fiber-reinforced fiber Plastic composite semi-finished products (FKV semi-finished products). In other words, the method according to the invention is particularly preferably a method for producing a unidirectionally continuous fiber-reinforced fiber-plastic composite semifinished product (semifinished product).

In a further embodiment, the process according to the invention is operated continuously. In other words, it may be preferred according to the invention if the process according to the invention is a continuous process for producing a fiber-plastic composite.

In a preferred embodiment, the process according to the invention is a continuous winding process, in particular a continuous-sequential winding process, for producing a fiber-plastic composite.

In a particularly preferred embodiment, the process according to the invention is a continuous spiral winding process, in particular a continuous-sequential spiral winding process, for producing a fiber-plastic composite.

According to a second aspect, the invention relates to another method for producing a fiber-plastic composite (FRP).

• – Wickeln einer Kunststoffmatrix auf oder um einen Wickelkern, vorzugsweise auf oder um einen nackten, d.h. unbelegten, Wickelkern, und
• – Wickeln, insbesondere Spiralwickeln, wenigstens eines gespreizten Verstärkungsfaserrovings, vorzugsweise lediglich eines gespreizten Verstärkungsfaserrovings, auf oder um die gewickelte Kunststoffmatrix.

The method comprises the following steps:

• - Winding a plastic matrix on or around a winding core, preferably on or around a bare, ie unoccupied, winding core, and
• - Winding, in particular spiral wound, at least one spread reinforcing fiber roving, preferably only a spread reinforcing fiber roving on or around the wound plastic matrix.

The term "at least one" in the context of the second aspect of the invention means "a" (singular), preferably only one or more (plural, i.e. two or more). Similarly, for example, the term "at least one spread gain roving" is a spread gain roving, preferably just a spread gain roving, or a plurality of spread gain rovings, i. two or more splayed reinforcing fiber rovings.

In a reinforcement advantageous embodiment, the at least one reinforcing fiber roving is at least one non-thermoplastic reinforcing fiber roving, i. at least one roving comprising non-thermoplastic reinforcing fibers or non-thermoplastic reinforcing fibers.

In an alternative embodiment, the at least one reinforcing fiber roving is at least one thermoplastic reinforcing fiber roving, i. at least one roving which comprises thermoplastic reinforcing fibers or consists of thermoplastic reinforcing fibers. The use of at least one such reinforcing fiber roving makes it possible with particular advantage to bind (or join) the at least one spread reinforcing fiber roving and the plastic matrix in a manner that binds and / or dissolves. In particular, the at least one reinforcing fiber roving in this embodiment can take over the function of an adhesive component.

In order not to impair the reinforcing function of the at least one fiber roving, it can be provided according to the invention in particular that the at least one reinforcing fiber roving is at least one thermoplastic reinforcing fiber roving which has a higher melting point than the plastic matrix.

According to the invention, it may further be possible for the at least one reinforcing fiber roving to comprise or consist of thermoplastic reinforcing fibers which have a higher melting point than the plastic matrix and non-thermoplastic reinforcing fibers.

The embodiments described in the two preceding paragraphs have the particular advantage that the reinforcing function of the fibers is not impaired if energy, preferably thermal energy, is introduced for the purpose of connecting the at least one reinforcing fiber roving and the plastic matrix.

The at least one reinforcing fiber roving in another embodiment comprises reinforcing fibers or consists of reinforcing fibers selected from the group consisting of inorganic fibers, metal fibers, organic fibers such as polymer fibers, natural fibers, and combinations thereof.

The at least one reinforcing fiber roving is in a further embodiment selected from the group consisting of at least one glass fiber roving, at least one mineral fiber roving, at least one basalt fiber roving, at least one boron fiber roving, at least one silica fiber roving, at least one ceramic fiber roving, at least one steel fiber roving, at least one carbon fiber roving, at least one aramid fiber roving, at least one polyester fiber roving, at least one polyamide fiber roving such as at least one nylon fiber roving, at least one polyethylene fiber roving, at least one plexiglass fiber roving, at least one wood fiber roving, at least one flax fiber roving, at least one hemp roving, at least one jute roving , at least one kenaffa roving, at least one ramie roving, at least one sisal fiber roving, and combinations thereof. In other words, the at least one reinforcing fiber roving in a further embodiment comprises reinforcing fibers or consists of reinforcing fibers selected from the group consisting of glass fibers, mineral fibers, basalt fibers, boron fibers, silica fibers, ceramic fibers, steel fibers, carbon fibers, aramid fibers, polyester fibers, Polyamide fibers such as nylon fibers, polyethylene fibers, plexiglass fibers, wood fibers, flax fibers, hemp fibers, jute fibers, kenaf fibers, ramie fibers, sisal fibers, and combinations thereof.

In a further embodiment, the at least one reinforcing fiber roving has a fineness ≦ 4800 tex, in particular from 68 tex to 2400 tex, preferably 200 tex to 1200 tex. For the purposes of the present invention, the term "fineness" is to be understood to mean a length-related weight of the at least one reinforcing fiber roving. The unit 1 tex means a weight of 1 gram per 1000 meters roving length.

The at least one spread reinforcing fiber roving, in a further embodiment, is processed at a speed of 0.3 m / min to 30 m / min, in particular 1 m / min to 15 m / min, preferably 3 m / min to 9 m / min.

In an expedient embodiment, the at least one spread reinforcing fiber roving is attached to the winding core prior to winding. A fastening of the at least one reinforcing fiber roving can take place, for example, by means of a mechanical, electrical or pneumatic clamping device, wherein the clamping device is preferably a clamping device which can be lowered into the winding core.

The at least one spread reinforcing fiber roving is wound according to a further embodiment by means of a movable in the longitudinal direction of the winding core deposition device on or around the plastic matrix.

In a further embodiment, during the winding of the at least one spread reinforcing fiber roving, longitudinal sections of the at least one spread reinforcing fiber roving, preferably sequentially, are deposited on the plastic matrix.

During the winding of the at least one spread reinforcing fiber roving, longitudinal sections of the at least one spread reinforcing fiber roving are preferably placed next to one another, in particular parallel next to one another, on the plastic matrix.

Preferably, during the winding of the at least one spread reinforcing fiber roving, longitudinal portions of the at least one spread reinforcing fiber roving are piled up on the plastic matrix.

In the event that the at least one splayed reinforcing fiber roving is a plurality of reinforcing fiber rovings, in a preferred embodiment, they are wound parallel to each other on or around the plastic matrix.

In principle, the at least one spread reinforcing fiber roving can be wound in multiple layers on or around the plastic matrix. However, it is preferred in accordance with the invention if the at least one reinforcing fiber roving is single-ply, i. only in one layer, being wound on or around the plastic matrix. This is particularly advantageous with regard to a further processing of the obtainable by the process according to the invention fiber-plastic composite to thin-film laminates with the lowest possible thicknesses. In the case of at least one reinforcing fiber roving wound in one layer on or around the plastic matrix, the ends of the at least one reinforcing fiber roving may be laid on the plastic matrix in shock or in a partially overlapping manner.

According to a particularly preferred embodiment, the at least one spread reinforcing fiber roving in the form of a fabric, in particular unidirectional and preferably single-ply gel, is wound on or around the plastic matrix.

In a further embodiment, during the winding of the at least one spread reinforcing fiber roving or after winding the at least one spread reinforcing fiber roving (on or around the plastic matrix), the at least one spread reinforcing fiber roving and the plastic matrix are preferably cohesively bonded to the winding core to obtain a wound fiber-plastic Bonded together.

The joining of the at least one spread reinforcing fiber roving and the Plastic matrix can be carried out in particular without the use of a binder and / or solvent.

In principle, the joining of the at least one spread reinforcing fiber roving and the plastic matrix can only be carried out locally, in particular only at certain points. An only local, in particular only selective, connecting the at least one reinforcing fiber roving and the plastic matrix has the advantage that a required energy input and a concomitant material stress of the at least one reinforcing fiber roving and the plastic matrix can be minimized. Significant impairment of their material-specific performance potential can be avoided.

In an alternative embodiment, the at least one spread reinforcing fiber roving and the plastic matrix are connected to one another over the whole area.

In a further embodiment, to obtain a wound fiber-plastic composite, in particular the already-mentioned wound fiber-plastic composite, the at least one spread reinforcing fiber roving and the plastic matrix are thermally, i. under heat, connected together. For this purpose, in principle, the at least one reinforcing fiber roving (in the spread or non-spread state) and / or the plastic matrix, preferably the at least one reinforcing fiber roving and the plastic matrix, can be heated. The heating can be carried out before, during or after the winding of the at least one reinforcing fiber roving on or around the plastic matrix.

The heating of the at least one reinforcing fiber roving and / or the plastic matrix is carried out in another embodiment by means of a heating device.

In an expedient embodiment, the heating device is a heating device movable transversely to the winding core.

In a further embodiment, the heating device is a heat radiator, in particular infrared radiator.

The heating device preferably has a heat radiation surface whose length corresponds at least to the length of the winding core. Preferably, the winding core is rotated at least once by 360 degrees about its own longitudinal axis during heating. In this way, a complete heating of the at least one reinforcing fiber roving and the plastic matrix can be ensured. By means of such a heating device it is particularly advantageously possible to heat the at least one reinforcing fiber roving and / or the plastic matrix during winding or after winding the at least one reinforcing roving on or around the plastic matrix.

A thermal bonding of the at least one spread reinforcing fiber roving and the plastic matrix may in principle be based on a (partial) melting of the at least one reinforcing fiber roving and / or the plastic matrix, preferably only on a (partial) melting of the plastic matrix, and then solidifying the at least one reinforcing fiber roving and / or or the plastic matrix, preferably based on a subsequent solidification of only the plastic matrix.

In the case of a textile plastic matrix, its textile structure preferably remains at least partially, in particular substantially, when the at least one reinforcing fiber roving and the plastic matrix are joined, so that the resulting fiber-plastic composite can be received, for example by means of needle grippers, and held securely during transport. In the case of selectively selectively intensified action of heat on a thermoplastic polymer matrix, a local, in particular punctiform, connection between the composite components (at least one reinforcing fiber roving and plastic matrix) is created, which accommodates at precisely these connection points by means of vacuum grippers and thus the secure transport of the fibers. Plastic composites guaranteed.

In another embodiment, at least one further plastic matrix is wound on or around the at least one reinforcing fiber roving after the winding of the at least one spread reinforcing fiber roving and, in particular, after a material bonding of the plastic matrix and the at least one reinforcing fiber roving on the winding core. In this case, the plastic matrix, on or around which the at least one spread reinforcing fiber roving is wound, and the at least one further plastic matrix can basically be designed the same or different. According to the invention, it is preferred if both the plastic matrix, on or around which the at least one spread reinforcing fiber roving is wound, and the at least one further plastic matrix are in each case embodied in a thermoplastic and in particular textile, preferably nonwoven, form. For further details regarding possible embodiments of the at least one further plastic matrix, reference is made to the previous description.

According to a further embodiment, the at least one further plastic matrix and the at least one reinforcing fiber roving are preferably cohesively and in particular free of binder and solvent on the winding core during winding or after winding of the at least one further plastic matrix (on or around the at least one wound reinforcing fiber roving) a wound fiber-plastic composite connected to each other. The resulting wound fiber-plastic composite has (at least) three layers, namely (at least) two plastic matrix layers and a layer therebetween, which is formed by the at least one reinforcing fiber roving. Such a fiber-plastic composite facilitates a possible further processing of a finished product, preferably a thin-film laminate. On top of that, the at least one further plastic matrix protects against any loss of fibers of the at least one reinforcing fiber roving.

Preferably, the at least one further plastic matrix and the at least one reinforcing fiber roving are thermally, i. under heat, connected together.

A thermal bonding of the at least one further plastic matrix and the at least one reinforcing fiber roving can basically be based on a (partial) melting of the at least one further plastic matrix and / or the at least one reinforcing fiber roving, preferably only on a (partial) melting of the at least one further plastic matrix subsequent solidification of the at least one further plastic matrix and / or the at least one reinforcing fiber roving, preferably based on a subsequent solidification of only the at least one further plastic matrix. With regard to further features and advantages for connecting the at least one further plastic matrix and the at least one reinforcing fiber roving, reference is made to the embodiments for joining the at least one reinforcing fiber roving and the plastic matrix on which the at least one reinforcing fiber roving is wound. The remarks made there apply mutatis mutandis to connecting the at least one further plastic matrix and the at least one Verstärkungsfaserrovings.

With respect to further features and advantages of the method, in particular the plastic matrix, the (at least one) reinforcing fiber roving and the winding core, reference is made to avoid repetition to the statements made in the context of the previous description.

According to a third aspect, the invention relates to a fiber-plastic composite (FKV), in particular a two-dimensional fiber-plastic composite (FKV), which can be obtained or produced by a method according to the first or second aspect of the invention.

The fiber-plastic composite is preferably a fiber-plastic composite semi-finished product (semi-finished FKV).

The fiber-plastic composite has reinforcing fibers and a plastic matrix. The reinforcing fibers are surrounded by the plastic matrix or are embedded in the plastic matrix.

The plastic matrix is preferably in the form of a two-dimensional plastic matrix.

Preferably, the plastic matrix is strip-shaped, in particular quadrangular, preferably rectangular, formed.

According to the invention, the fiber-plastic composite may consist in particular of reinforcing fibers and a plastic matrix.

The reinforcing fibers are preferably non-thermoplastic reinforcing fibers. In addition or alternatively, the reinforcing fibers may be thermoplastic reinforcing fibers having a higher melting point than the plastic matrix.

The reinforcing fibers may be selected from the group consisting of inorganic fibers, metal fibers, organic fibers such as polymer fibers, natural fibers, and combinations thereof.

For example, the reinforcing fibers may be selected from the group consisting of glass fibers, mineral fibers, basalt fibers, boron fibers, silica fibers, ceramic fibers, steel fibers, carbon fibers, aramid fibers, polyester fibers, polyamide fibers such as nylon fibers, polyethylene fibers, plexiglass fibers, wood fibers, flax fibers, hemp fibers, jute fibers, Kenaf fibers, ramie fibers, sisal fibers and combinations thereof.

The reinforcing fibers may in principle be continuous fibers or cut fibers.

Preferably, the reinforcing fibers of the fiber-plastic composite are cut-to-length reinforcing fibers.

The reinforcing fibers may have a length of 12 mm to 50 mm.

Furthermore, the reinforcing fibers may have a fineness ≦ 4800 tex, in particular from 68 tex to 2400 tex, preferably 200 tex to 1200 tex.

The reinforcing fibers are preferably arranged unidirectionally in the fiber-plastic composite. Particularly preferably, the reinforcing fibers are arranged or contained in the form of a unidirectional layer in the fiber-plastic composite. For the purposes of the present invention, the term "unidirectional scrim" is to be understood as meaning a web of one or more layers of parallel, stretched and in particular undulating fibers, the fibers each having the same orientation.

The reinforcing fibers can be arranged or contained in particular in the form of a unidirectional and single-layer fabric in the fiber-plastic composite.

In principle, the plastic matrix may be a non-thermoplastic plastic matrix.

According to a particularly preferred embodiment, however, the plastic matrix is a thermoplastic polymer matrix.

In the case of thermoplastic reinforcing fibers, a thermoplastic resin matrix preferably has a lower melting point than the reinforcing fibers.

The plastic matrix may in particular comprise a thermoplastic material or consist of a thermoplastic material, which is preferably selected from the group consisting of polypropylene (PP), polyamides (PA), polyetheretherketone (PEEK), polyphenylene sulphide (PPS), polysulphone (PSU), polyetherimide (PEI), polytetrafluoroethylene (PTFE), thermoplastic polyurethane (TPU), polyethylene terephthalate (PET), polyethylene (PE), and combinations thereof.

In a further embodiment, the plastic matrix is formed in a textile shape.

The plastic matrix preferably has a nonwoven or is in the form of a nonwoven.

The plastic matrix particularly preferably has a nonwoven fabric or is in the form of a nonwoven fabric.

The plastic matrix is particularly preferably a thermoplastic and fleece-shaped, in particular nonwoven-shaped, plastic matrix. For example, the plastic matrix may be a nonwoven fabric of polyamide or polypropylene.

In a further embodiment, the reinforcing fibers and the plastic matrix are thermally bonded together. The reinforcing fibers and the plastic matrix can only locally, in particular only selectively, or continuously, i. over the entire surface of the plastic matrix, be interconnected.

In a further embodiment, the fiber-plastic composite is strip-shaped, in particular quadrangular, preferably rectangular.

The fiber-plastic composite may in particular have a dimension (length × width) of 0.3 m × 0.7 m to 5 m × 10 m, in particular 1 m × 1 m to 5 m × 5 m, preferably 1.5 m × 2.5 m to 2.5 m × 5 m, own.

The fiber-plastic composite is preferably intended for use as a lightweight material, in particular for applications in lightweight material and / or structural construction.

With regard to further features and advantages of the fiber-plastic composite, complete reference is made to the previous description to avoid repetition.

According to a fourth aspect, the invention relates to a fiber-plastic composite (FRP), in particular a two-dimensional fiber-plastic composite (FRP), which comprises a plastic matrix and reinforcing fibers or consists of a plastic matrix and reinforcing fibers.

The plastic matrix is preferably a thermoplastic and in particular fleece-shaped, preferably nonwoven-shaped, plastic matrix.

The reinforcing fibers are preferably in the form of a unidirectional and in particular single-ply Geleges.

The plastic matrix is preferably in the form of a two-dimensional plastic matrix.

Preferably, the plastic matrix is strip-shaped, in particular quadrangular, preferably rectangular, formed.

The fourth aspect of the invention particularly preferably relates to a fiber-plastic composite, which is a thermoplastic and preferably Non-woven plastic matrix and a layer of preferably unidirectionally arranged reinforcing fibers.

With regard to further features and advantages of the fiber-plastic composite, reference is also made to avoid repetition to the previous description.

According to a fifth aspect, the invention relates to a final product comprising at least one layer or at least one layer of a fiber-plastic composite according to the third or fourth aspects of the invention.

In the case of a multi-layered or multi-layered finished product, the individual layers or layers may differ with regard to the orientation of their fibers.

The final product in a particularly preferred embodiment is a laminate, in particular a thin-layer laminate.

In a further embodiment, the end product is intended for use as a lightweight component, in particular for use as a shell-shaped lightweight component.

With regard to further features and advantages of the final product, complete reference is made to the previous description in order to avoid repetition.

According to a sixth aspect, the invention relates to an apparatus for producing a fiber-plastic composite (FRP), in particular for carrying out a method according to the first aspect of the invention.

• – eine Zuführeinrichtung, insbesondere nur eine Zuführeinrichtung, zum vorzugsweise kontinuierlichen Zuführen eines Verstärkungsfaserrovings, insbesondere lediglich eines Verstärkungsfaserrovings,
• – eine Spreizeinrichtung, insbesondere nur eine Spreizeinrichtung, zum Spreizen eines Verstärkungsfaserrovings, insbesondere lediglich eines Verstärkungsfaserrovings, und/oder ein Spreizelement oder ggf. mehrere Spreizelemente zum Spreizen eines Verstärkungsfaserrovings, insbesondere lediglich eines Verstärkungsfaserrovings,
• – einen Wickelkern und
• – eine Ablegeeinrichtung, insbesondere nur eine Ablegeeinrichtung, zum Ablegen eines gespreizten Verstärkungsfaserrovings, insbesondere lediglich eines gespreizten Verstärkungsfaserrovings, auf oder um eine Kunststoffmatrix, welche auf einen Wickelkern aufgebracht, insbesondere auf oder um einen Wickelkern gewickelt, ist, oder zum Ablegen eines gespreizten Verstärkungsfaserrovings, insbesondere lediglich eines gespreizten Verstärkungsfaserrovings, auf einen nackten, d.h. unbelegten, Wickelkern und/oder eine Ablegeeinrichtung zum Ablegen einer Kunststoffmatrix auf einen nackten, d.h. unbelegten, Wickelkern oder zum Ablegen einer Kunststoffmatrix auf oder um einen gespreizten Verstärkungsfaserroving, welcher auf oder um einen Wickelkern gewickelt ist.

The device has the following:

• A feed device, in particular only one feed device, for preferably continuous feeding of a reinforcing fiber roving, in particular only one reinforcing fiber roving,
• A spreading device, in particular only a spreading device, for spreading a reinforcing fiber roving, in particular only a reinforcing fiber roving, and / or a spreading element or optionally a plurality of spreading elements for spreading a reinforcing fiber roving, in particular only a reinforcing fiber roving,
• - a winding core and
• A depositing device, in particular only one depositing device, for depositing a spread reinforcing fiber roving, in particular only a spread reinforcing fiber roving, on or around a plastic matrix which is applied to a winding core, in particular wound on or around a winding core, or for laying a spread reinforcing fiber roving, in particular only a spread Verstärkungsfaserrovings, on a bare, ie unoccupied, winding core and / or a depositing device for depositing a plastic matrix on a bare, ie unoccupied, winding core or for depositing a plastic matrix on or around a spread Verstärkungsfaserroving, which wound on or around a winding core is.

According to the invention, provision can be made in particular for the device to consist of the components mentioned in the last paragraph (feeding device, spreading device and / or spreading element or spreading element, winding core and depositing device (s)) and possibly a heating device and / or an arresting device, which will be described hereinafter will be discussed in more detail exists.

The feed device is preferably designed as a roller or coil. Preferably, the feeder provides the roving continuously.

The spreader preferably comprises two oppositely arranged pressure rollers.

The spreading element or the spreading elements can / can be part of the depositing device.

The depositing device for depositing a spread reinforcing fiber roving is designed to be movable in a further embodiment in the longitudinal direction of the winding core. In this way, longitudinal sections of the expanded reinforcing fiber roving can be deposited sequentially and in particular parallel to one another, preferably stacked on or around the plastic matrix or the bare winding core.

The depositing device for depositing a spread reinforcing fiber roving has, in an advantageous embodiment, a heating element. The heating element is designed to effect heating, preferably melting, of the reinforcing fiber roving and / or of the plastic matrix, in particular of only one plastic matrix.

In an alternative embodiment, the device has a heating device independent of the depositing device mentioned in the previous paragraph. The heating device is designed to effect a heating, preferably melting, of the reinforcing fiber roving and / or the plastic matrix, in particular only the plastic matrix. The heating device can in particular be a heat radiator, such as an infrared radiator. The heater may further in the transverse direction of the Winding core formed movable, ie, viewed in the conveying direction, be arranged behind the winding core and be moved away to the winding core to and from the winding core. Preferably, the heater causes a full-surface heating of reinforcing fiber roving and plastic matrix. For this purpose, the heating device may have a heat radiating surface whose length corresponds at least to the length of the winding core. The heater can be designed for example as a heating hood.

The heating element or the heating device is preferably provided to enable a thermomechanical, material-locking connection of reinforcing fiber roving and plastic matrix by thermal stressing / treatment of the composite components.

The heating element or the heating device can be designed, in particular, to heat the reinforcing fiber roving and / or the plastic matrix, preferably only the plastic matrix, only locally, in particular only at certain points, preferably to melt it.

The heating element or the heating device can furthermore be designed to melt the plastic matrix directly or indirectly, preferably by heating the reinforcing fiber roving.

In a further embodiment, the depositing device has a locking unit.

Alternatively, the device according to the invention may have an arresting device independent of the depositing device.

The locking unit or the locking device is designed to deposit longitudinal sections of the spread reinforcing fiber roving abutting the plastic matrix.

In a further embodiment, the device has a pressing device. The pressing device is designed to press the plastic matrix onto the reinforcing fiber roving during or after a preferably cohesive connection to a reinforcing fiber roving, which is wound on or around a bare winding core.

The device according to the invention is preferably a winding machine, in particular a spiral winding machine.

With regard to further features and advantages of the device, reference is made to the previous description to avoid repetition.

• – Wickeln, insbesondere Spiralwickeln, wenigstens eines gespreizten Verstärkungsfaserrovings, vorzugsweise lediglich eines gespreizten Verstärkungsfaserrovings, auf oder um einen Wickelkern, vorzugsweise auf oder um einen nackten, d.h. unbelegten, Wickelkern, und
• – Wickeln einer Kunststoffmatrix auf oder um den wenigstens einen gewickelten Verstärkungsfaserroving

According to a seventh aspect, the invention relates to a method for producing a fiber-plastic composite (FKV), which comprises the following steps:

• - Winding, in particular spiral wound, at least one spread Verstärkungsfaserrovings, preferably only a spread Verstärkungsfaserrovings, on or around a winding core, preferably on or about a bare, ie unoccupied, winding core, and
• Winding a plastic matrix on or around the at least one wound reinforcing fiber roving

The term "at least one" in the seventh aspect of the invention means "a" (singular), preferably only one or more (plural, i.e., two or more). Similarly, for example, the term "at least one spread gain roving" is a spread gain roving, preferably just a spread gain roving, or a plurality of spread gain rovings, i. two or more splayed reinforcing fiber rovings.

In a reinforcement advantageous embodiment, the at least one reinforcing fiber roving is at least one non-thermoplastic reinforcing fiber roving, i. at least one roving comprising non-thermoplastic reinforcing fibers or non-thermoplastic reinforcing fibers.

In an alternative embodiment, the at least one reinforcing fiber roving is at least one thermoplastic reinforcing fiber roving, i. at least one roving which comprises thermoplastic reinforcing fibers or consists of thermoplastic reinforcing fibers. The use of at least one such reinforcing fiber roving makes it possible with particular advantage to bind (or join) the at least one spread reinforcing fiber roving and the plastic matrix in a manner that binds and / or dissolves. In particular, the at least one reinforcing fiber roving in this embodiment can take over the function of an adhesive component.

In order not to impair the reinforcing function of the at least one fiber roving, it can be provided according to the invention in particular that the at least one reinforcing fiber roving is at least one thermoplastic reinforcing fiber roving which has a higher melting point than the plastic matrix.

According to the invention, it may further be possible for the at least one reinforcing fiber roving to comprise or consist of thermoplastic reinforcing fibers which have a higher melting point than the plastic matrix and non-thermoplastic reinforcing fibers.

The embodiments described in the two preceding paragraphs have the particular advantage that the reinforcing function of the fibers is not impaired if energy, preferably thermal energy, is introduced for the purpose of connecting the at least one reinforcing fiber roving and the plastic matrix.

The at least one reinforcing fiber roving in another embodiment comprises reinforcing fibers or consists of reinforcing fibers selected from the group consisting of inorganic fibers, metal fibers, organic fibers such as polymer fibers, natural fibers, and combinations thereof.

The at least one reinforcing fiber roving is in a further embodiment selected from the group consisting of at least one glass fiber roving, at least one mineral fiber roving, at least one basalt fiber roving, at least one boron fiber roving, at least one silica fiber roving, at least one ceramic fiber roving, at least one steel fiber roving, at least one carbon fiber roving, at least one aramid fiber roving, at least one polyester fiber roving, at least one polyamide fiber roving such as at least one nylon fiber roving, at least one polyethylene fiber roving, at least one plexiglass fiber roving, at least one wood fiber roving, at least one flax fiber roving, at least one hemp roving, at least one jute roving, at least one kenaffa roving, at least one ramie roving, at least one Sisal fiber roving and combinations thereof. In other words, the at least one reinforcing fiber roving in a further embodiment comprises reinforcing fibers or consists of reinforcing fibers selected from the group consisting of glass fibers, mineral fibers, basalt fibers, boron fibers, silica fibers, ceramic fibers, steel fibers, carbon fibers, aramid fibers, polyester fibers, Polyamide fibers such as nylon fibers, polyethylene fibers, plexiglass fibers, wood fibers, flax fibers, hemp fibers, jute fibers, kenaf fibers, ramie fibers, sisal fibers, and combinations thereof.

In a further embodiment, the at least one reinforcing fiber roving has a fineness ≦ 4800 tex, in particular from 68 tex to 2400 tex, preferably 200 tex to 1200 tex. For the purposes of the present invention, the term "fineness" is to be understood to mean a length-related weight of the at least one reinforcing fiber roving. The unit 1 tex means a weight of 1 gram per 1000 meters roving length.

In one embodiment, the at least one expanded reinforcing fiber roving is secured to the winding core prior to winding. For example, the at least one reinforcing fiber roving can be fastened to the winding core by means of a mechanical, electrical or pneumatic clamping device. The clamping device is preferably a retractable into the winding core clamping device.

The at least one spread reinforcing fiber roving is preferably wound on or around the winding core by means of a laying device which can be moved in the longitudinal direction of the winding core.

In a further embodiment, during the winding of the at least one spread reinforcing fiber roving (on or around the winding core), longitudinal sections of the at least one spread reinforcing fiber roving, preferably sequentially, are deposited on the winding core.

During the winding of the at least one spread reinforcing fiber roving (on or around the winding core), longitudinal sections of the at least one spread reinforcing fiber roving are preferably laid side by side, in particular parallel to one another, on the winding core.

During the winding of the at least one spread reinforcing fiber roving (on or around the winding core), longitudinal sections of the at least one spread reinforcing fiber roving are preferably deposited onto the winding core in shock-on-impact fashion.

In the event that the at least one spread reinforcing fiber roving is a plurality of reinforcing fiber rovings, in a preferred embodiment, they are wound parallel to one another on or around the winding core.

According to a particularly preferred embodiment, the at least one spread reinforcing fiber roving is wound on or around the winding core in the form of a slip, in particular a unidirectional and preferably single-ply slip.

In another embodiment, the plastic matrix is fixed prior to winding (on or around the at least one wound reinforcing fiber roving) by means of a mechanical, electrical or pneumatic clamping rail along the length of the winding core.

In principle, the at least one spread reinforcing fiber roving can be wound in multiple layers on or around the winding core. According to the invention, however, it is preferred if the at least one reinforcing fiber roving is wound in only one layer, ie only in one layer, on or around the winding core. This is particularly advantageous with regard to a further processing of the obtainable by the process according to the invention fiber-plastic composite to thin-film laminates with the lowest possible thicknesses.

In principle, the plastic matrix can be wound in multiple layers on or around the at least one reinforcing fiber roving. However, it is preferred according to the invention if the plastic matrix is single-layered, i. only in one layer, on or around the at least one reinforcing fiber roving is wound. This is particularly advantageous with regard to a further processing of the fiber-plastic composite to thin-film laminates with the smallest possible thickness of each laminate layer.

In another embodiment, during winding of the plastic matrix or after winding the plastic matrix (on or around the at least one reinforcing fiber roving), the at least one reinforcing fiber roving and the plastic matrix are preferably bonded together in a cohesive manner on the winding core to obtain a wound fiber-plastic composite.

The bonding of the plastic matrix and the at least one reinforcing fiber roving can be carried out in particular without the use of a binder and / or solvent.

In principle, the joining of the plastic matrix and the at least one reinforcing fiber roving can be carried out only locally, in particular only at certain points. An only local, in particular only selective, connecting the plastic matrix and the at least one reinforcing fiber roving has the advantage that a required energy input and a concomitant material stress of the plastic matrix and the at least one Verstärkungsfaserrovings can be minimized. Significant impairment of their material-specific performance potential can be avoided.

In an alternative embodiment, the plastic matrix and the at least one reinforcing fiber roving are connected to one another over the entire surface.

In a further embodiment, to obtain the wound fiber-plastic composite, the plastic matrix and the at least one reinforcing fiber roving are thermally, i. under heat, connected together. For this purpose, in principle, the plastic matrix and / or the at least one reinforcing fiber roving, preferably the at least one reinforcing fiber roving and the plastic matrix, can be heated. The heating can be carried out before, during or after the winding of the plastic matrix on or around the at least one reinforcing fiber roving.

The heating of the plastic matrix and / or of the at least one reinforcing fiber roving is carried out in another embodiment by means of a heating device. The heating device can be designed, for example, as a heating hood.

In an expedient embodiment, the heating device is a heating device movable transversely to the winding core.

In a further embodiment, the heating device is a heat radiator, in particular infrared radiator.

The heating device preferably has a heat radiation surface whose length corresponds at least to the length of the winding core. Preferably, the winding core is rotated at least once by 360 degrees about its own longitudinal axis during heating. In this way, a complete heating of the plastic matrix and the at least one reinforcing fiber roving can be ensured. By means of such a heating device it is particularly advantageously possible to heat the plastic matrix and / or the at least one reinforcing fiber roving during winding or after winding the plastic matrix on or around the at least one reinforcing roving.

A thermal bonding of the plastic matrix and the at least one reinforcing fiber roving can basically be based on (partial) melting of the plastic matrix and / or the at least one reinforcing fiber roving, preferably only on (partial) melting of the plastic matrix, and then solidifying the plastic matrix and / or the at least a reinforcing fiber rovings, preferably based on a subsequent solidification of only the plastic matrix.

In a further embodiment, the plastic matrix is pressed against the at least one reinforcing fiber roving during the preferably integral connection with the at least one reinforcing fiber roving by means of a pressing device, preferably a roller.

In a further embodiment, the wound fiber-plastic composite described in the preceding embodiments is removed from the winding core. In the case of a multi-part, in particular two-part, formed winding core this can be done in that the winding core is removed from the mold after receiving the wound fiber-plastic composite.

In an alternative embodiment, the winding core, after receiving the wound fiber-plastic composite by washing, in particular dissolution, removed from the wound fiber-plastic composite.

In a further embodiment, the wound fiber-plastic composite is withdrawn from the winding core.

The wound fiber-plastic composite mentioned in the preceding embodiments, which is preferably a spirally wound fiber-plastic composite, may in principle already be the fiber-plastic composite to be produced according to the invention.

In a preferred embodiment, however, the wound fiber-plastic composite mentioned in the preceding embodiments is further processed. In other words, the wound fiber-plastic composite mentioned in the preceding embodiments is preferably only an intermediate product.

Preferably, the wound fiber-plastic composite mentioned in the preceding embodiments is moved along its longitudinal direction, i. along the winding core axis, cut to obtain a two-dimensional fiber-plastic composite, preferably cut open. The two-dimensional fiber-plastic composite is preferably the fiber-plastic composite to be produced according to the invention. In other words, the method according to the invention is thus preferably a method for producing a two-dimensional fiber-plastic composite, in particular a two-dimensional fiber-plastic composite semifinished product (FRP semi-finished product).

Particularly preferably, the fiber-plastic composite to be produced is a unidirectionally endless-fiber-reinforced fiber-plastic composite semifinished product (semifinished FRP). In other words, the method according to the invention is particularly preferably a method for producing a unidirectionally continuous fiber-reinforced fiber-plastic composite semifinished product (semifinished product).

In a further embodiment, the process according to the invention is operated continuously. In other words, it may be preferred according to the invention if the process according to the invention is a continuous process for producing a fiber-plastic composite.

In a preferred embodiment, the process according to the invention is a continuous winding process, in particular a continuous-sequential winding process, for producing a fiber-plastic composite.

In a particularly preferred embodiment, the process according to the invention is a continuous spiral winding process, in particular a continuous-sequential spiral winding process, for producing a fiber-plastic composite.

With regard to further features and advantages of the method, in particular the plastic matrix, the (at least one) reinforcing fiber roving and the winding core, reference is made to the previous description to avoid repetition.

According to an eighth aspect, the invention relates to the use of a fiber-plastic composite according to the third or fourth aspect of the invention as a lightweight material, in particular for applications in material and / or structural lightweight construction.

With regard to further features and advantages of the fiber-plastic composite, reference is also made to avoid repetition to the previous description.

• – Durch eine kontinuierliche Verarbeitung vorzugsweise nur eines Rovings zu einem Faser-Kunststoff-Verbund lassen sich eine höhere Prozessstabilität sowie -sicherheit erreichen.
• – Es werden großserientechnisch verfügbare Verbundkomponenten in vorzugsweise sortenreiner Anhäufung verwendet, nämlich Verstärkungsfaserroving und Kunststoffmatrix.
• – Die Toleranzen der Materialanhäufungen können im Bedarfsfall auf die Toleranzen von lediglich zwei zu paarenden Ausgangskomponenten, nämlich Verstärkungsfaserroving sowie Kunststoffmatrix, beschränkt werden.
• – Konstante geometrische Verarbeitungsverhältnisse können identisch in jeden herzustellenden Faser-Kunststoff-Verbund übertragen werden und gewähren eine maximale Reproduzierbarkeit und Strukturhomogenität bei der Herstellung eines Faser-Kunststoff-Verbunds.
• – Materialmängel können im laufenden Prozess unmittelbar erkannt werden. Bis zum Erkennen eines Mangels hergestellte Mengen eines Faser-Kunststoff-Verbunds und damit geleistete Produktivität bleiben für die weitere Verarbeitung, insbesondere zur Herstellung von Dünnschichtlaminaten, erhalten. Prozessunterbrechungen beschränken sich mithin auf die Mängelbeseitigung an der jeweiligen Einzelkomponente. Anschließend kann der Prozess ohne Qualitätsverlust fortgesetzt werden.
• – Durch eine kontinuierliche Positionserkennung am Ablage- und Fügeort kann die Strukturhomogenität des herzustellenden Faser-Kunststoff-Verbunds geregelt werden. In Kombination mit einer Fadenspannungsregulierung kann dies zu einer deutlichen Verringerung der technischen Prozessintensität beitragen.
• – Durch Verwendung einer insbesondere vliesstoffförmigen Kunststoffmatrix besteht die Möglichkeit einer erheblichen Reduzierung der Schichtdicke des herzustellenden Faser-Kunststoff-Verbunds sowie von hieraus hergestellten Dünnschichtlaminaten.
• – Bei Verwendung einer insbesondere vliesstoffförmigen Kunststoffmatrix lässt sich der Faservolumengehalt des herzustellenden Faser-Kunststoff-Verbunds mit besonderem Vorteil über das Flächengewicht der Kunststoffmatrix einstellen. Entsprechendes gilt für ausgehend von dem Faser-Kunststofff-Verbund hergestellte Dünnschichtlaminate. Hierdurch erweisen sich die erfindungsgemäßen Verfahren als sehr flexibel und eröffnen insbesondere die Möglichkeit für einen schnellen Produktwechsel.
• – Ein weiterer Vorteil besteht in der Herstellung eines Faser-Kunststoff-Verbunds, bei welchem die Fasern vorzugsweise in Form eines unidirektionalen Geleges vorliegen, wodurch eine eingangs im Zusammenhang mit Geweben als nachteilig beschriebene Ondulation der Fasern vermieden werden kann.
• – Proportional zu gesteigerten Spreizraten können die Massen von zu verarbeitender Kunststoffmatrix vorzugsweise halbiert werden. Auf diese Weise sind insbesondere thermoplastische FKV-Leichtbaulaminate realisierbar, die je Laminatschicht deutlich im Dickenbereich von 0.1 mm und kleiner liegen.
• – Insgesamt ermöglicht die Erfindung eine energie- und ressourceneffiziente Herstellung von Faser-Kunststoff-Verbunden, insbesondere Faser-Kunststoff-Verbund-Halbzeugen.

Finally, the advantages that can be achieved by the present invention are summarized again as follows:

• By a continuous processing preferably only a roving to a fiber-plastic composite, a higher process stability and safety can be achieved.
• - Composite components which are available on a mass-production basis are preferably used in preferably sort-pure accumulation, namely reinforcing fiber roving and plastic matrix.
• - The tolerances of the material accumulations can be limited if necessary to the tolerances of only two to mating output components, namely reinforcing fiber roving and plastic matrix.
• - Constant geometric processing conditions can be transferred identically in each fiber-plastic composite to be produced and provide maximum reproducibility and Structural homogeneity in the production of a fiber-plastic composite.
• - Material defects can be detected immediately during the ongoing process. Quantities of a fiber-plastic composite produced up to the detection of a defect and the productivity thus achieved are retained for further processing, in particular for the production of thin-film laminates. Process interruptions are therefore limited to the removal of defects in the individual component. Subsequently, the process can continue without loss of quality.
• - By a continuous position detection at the storage and joining the structural homogeneity of the produced fiber-plastic composite can be controlled. In combination with a thread tension regulation this can contribute to a significant reduction of the technical process intensity.
• - By using a particular nonwoven-shaped plastic matrix there is the possibility of a significant reduction of the layer thickness of the fiber-plastic composite to be produced and of thin-film laminates produced therefrom.
• - When using a particular nonwoven-shaped plastic matrix, the fiber volume content of the produced fiber-plastic composite can be adjusted with particular advantage over the basis weight of the plastic matrix. The same applies to thin film laminates produced from the fiber-plastic composite. As a result, the methods according to the invention prove to be very flexible and in particular open up the possibility of a rapid product change.
• A further advantage consists in the production of a fiber-plastic composite in which the fibers are preferably in the form of a unidirectional layer, whereby an undulation of the fibers described above in connection with fabrics can be avoided.
• Proportional to increased spreading rates, the masses of plastic matrix to be processed can preferably be halved. In this way, in particular thermoplastic FKV lightweight laminates can be realized, which per laminate layer are clearly in the thickness range of 0.1 mm and smaller.
• Overall, the invention enables an energy and resource-efficient production of fiber-plastic composites, in particular fiber-plastic composite semi-finished products.

The present invention will be described by way of example with reference to advantageous embodiments with reference to the accompanying figures and with reference to an embodiment. In this case, individual features can be realized individually or in combination with each other.

Brief Description

1 schematically shows a device according to the invention for producing a fiber-plastic composite according to a method of the invention.

2 schematically shows a further device according to the invention for producing a fiber-plastic composite according to a method of the invention.

Detailed description of the figures

1 shows a device 100 for carrying out a process for producing a fiber-plastic composite according to the present invention. The produced fiber-plastic composite is preferably in the form of a fiber-plastic composite semifinished product.

The device 100 includes a feeder 110 for feeding only one reinforcing fiber roving 120 , The feeder 110 is preferably formed as a role or coil, of which the reinforcing fiber roving 120 is preferably provided in the conveying direction continuously rollable.

The device 100 further comprises a spreader 130 for spreading the reinforcing fiber roving 120 , The spreading device is preferred 130 in the form of two oppositely arranged pressure rollers 132 . 134 educated.

The device 100 further comprises a rotationally symmetrical winding core 140 , The winding core 140 is by means of a (not shown) drive unit set in rotation.

The device 100 further comprises a depositing device 150 for depositing the spread reinforcing fiber roving 120 on a preferably thermoplastic and in particular two-dimensional plastic matrix 160 , which on the winding core 140 applied, in particular wound, is.

To longitudinal sections of the spread reinforcing fiber roving 120 parallel next to each other on the plastic matrix 160 to be able to take off, is the depositing device 150 in the longitudinal direction of the winding core 140 movable trained.

To longitudinal sections of the spread reinforcing fiber roving 120 also shock to impact on the plastic matrix 160 it is furthermore preferred when the device 100 Furthermore, a locking device 170 having.

For thermally connecting the spread reinforcing fiber roving 120 and the plastic matrix 160 includes the device 100 Further, a heater 180 , preferably in the form of a heating hood. The heater 180 preferably has a heat radiation surface whose length is at least the length of the winding core 140 equivalent. The heater 180 is preferred in the transverse direction of the winding core 140 designed movable and can thus on the winding core 140 moved or moved away from it.

In the following, the implementation of a method according to the invention by means of in 1 illustrated device 100 described:
The reinforcing fiber roving 120 is preferably continuously from the supply device 110 unrolled and in the direction of the spreader 130 promoted. When passing through the spreader 130 becomes the reinforcing fiber roving 120 spread or widened to a roving with a band-shaped cross-section.

After spreading, the reinforcing fiber roving becomes 120 then by means of the depositing device 150 on the preferably thermoplastic polymer matrix 160 wound. The winding core 140 is continuously rotated. When winding the reinforcing fiber roving 120 on the plastic matrix 160 moves the depositing device 150 in the longitudinal direction of the winding core 140 such that longitudinal sections of the splayed reinforcing fiber roving 120 sequential and in particular parallel next to each other on the plastic matrix 160 be filed. By the locking device 170 become the longitudinal sections of the spread reinforcing fiber roving 120 also shock to impact on the plastic matrix 160 stored.

After winding the reinforcing fiber roving 120 on the plastic matrix 160 becomes the plastic matrix 160 by means of the heater 180 (partially) melted. For this purpose, the heater 180 until reaching a defined distance on the winding core 140 moved. During the heating process, the winding core 140 at least once rotated 360 degrees around its own longitudinal axis. By subsequently solidifying the plastic matrix 160 is a wound, in particular spiral wound, fiber-plastic composite 190 receive. The wound fiber-plastic composite 190 is preferably severed along its longitudinal direction, in particular cut, and converted into a non-illustrated two-dimensional fiber-plastic composite, which is a particularly preferred product of the process according to the invention.

2 shows another device 200 for carrying out a process for producing a fiber-plastic composite according to the present invention. The produced fiber-plastic composite is preferably in the form of a fiber-plastic composite semifinished product.

The device 200 comprises a rotationally symmetrical winding core 240 , The winding core 240 is by means of a (not shown) drive unit set in rotation. The winding core 240 can be designed, for example, cylindrical.

The device 200 further comprises a pressing device 245 , The pressing device 245 is designed to be a two-dimensional plastic matrix 260 to a reinforcing fiber roving 220 , which on or around the winding core 240 is wound to press. At the pressing device 245 it is preferably a (cold) roll, which is preferably coated with Teflon.

Furthermore, the device comprises 200 a heating device 280 , The heater 280 is intended to reinforce fiber roving 220 as well as the plastic matrix 260 thermally connect with each other. The thermal joining of reinforcing fiber roving 220 and plastic matrix 260 is based on a (partial) melting of the plastic matrix 260 and a subsequent solidification of the plastic matrix 260 ,

The heater 280 preferably has a heat radiation surface whose length is at least the length of the winding core 240 equivalent. The heater 280 can thereby on the winding core 240 moved or moved away from it. The heater 280 can be configured for example as an infrared radiator.

To warm the plastic matrix 260 before being deposited on the winding core 240 To avoid, the device can 200 furthermore a shielding device 285 include.

In the following, the implementation of a method according to the invention by means of in 2 illustrated device 200 described:
A splayed reinforcing fiber roving 220 is by means of a (not shown) depositing device on or around the winding core 240 wound. The winding core 240 is preferably continuously rotated. When winding the reinforcing fiber roving 220 on or around the hub 240 moves the depositing device in the longitudinal direction of the winding core 240 such that longitudinal sections of the splayed reinforcing fiber roving 220 next to each other, preferably bump to bump, on the hub 240 be filed.

While winding the reinforcing fiber roving 220 or after winding the reinforcing fiber roving 220 this is done by means of the heater 280 heated. For this purpose, the winding core 240 expediently set in rotation.

Subsequently, the plastic matrix 260 on or around the reinforcing fiber roving 220 wrapped, with the plastic matrix 260 during the winding process by means of the pressing device 245 to the still warm reinforcing fiber roving 220 is pressed.

Preference is given to reinforcing fiber roving after being applied to the winding core 240 has been wound by means of the heater 280 heated and (possibly temporally delayed) the plastic matrix 260 on or around the reinforcing fiber roving 220 wound so that during the entire winding process, the plastic matrix 260 always on heated sections of the reinforcing fiber roving 220 is filed. The in 2 double toned section 222 stands for an already heated reinforcing fiber roving section, whereas the in 2 simply toned section shown 224 represents a not yet heated reinforcing fiber roving section.

Through the heated reinforcing fiber roving 220 or section 222 it comes to a (partial) melting of the plastic matrix 260 , After cooling the plastic matrix 260 These are the reinforcing fiber roving 220 cohesively connected to each other.

The resulting wound fiber-plastic composite can then from the hub 240 be removed. Preferably, this is done by the fiber-plastic composite along the length of the winding core 240 is cut to obtain a two-dimensional fiber-plastic composite.

Embodiment for the production of a fiber-plastic composite

A roll was covered with a polyamide nonwoven fabric. Thereafter, a carbon fiber roving was fixed to the roll by means of an adhesive tape. Then the winding process was started. For this purpose, a drive motor associated with the main roller was switched on. A roving feed unit continuously drove the roving around the width of the roving (12 mm) during one roll revolution. A roving in the form of a wire helix or helix was placed side by side on the roller side by side. After one revolution, the voltage regulation of an active roving unwind unit was switched on. At the end of the winding process, the main rotor drive motor was switched off. The supplied roving was wrapped with adhesive tape just before the winding point (fixation of the individual carbon fibers). Then the roving was cut in the middle of the tape (both sides were fixed).

Thereafter, the Rovingende was fixed to the roller. Subsequently, a radiant heater was turned on, at the same time the drive motor of the occupied with carbon fiber and nonwoven roller was turned on. During the heating process, the roll was allowed to complete a complete revolution to consolidate the wound carbon fiber roving and the nonwoven fabric to form a wound fiber-plastic composite.

Subsequently, the fiber-plastic composite was cut at a cutting groove of the roller.

Setting parameters for the winding process:

• Tension (Active Thread Rolling Device): 2 N; Voltage measurement: Roving (Vorwickelpunkt): 20 N; Winding speed: 35%;

Heating process settings:

• Power of the radiant heater: 85%; Speed of main roller: 2,4; Rounds: 1
• Average time to make a fabric: 7 to 8 minutes
• Technical data of carbon fiber roving
• Manufacturer: Toho Tenax; Type: Tenax-E-HTS45 P12 12K; Tensile strength: 4532 MPa; Modulus of elasticity: 241.1 GPa; Elongation at break: 1.75%; Fineness: 800 Tex; Preparation mass fraction: 0.81%; Density: 1.77 g / cm ³ ; Filament diameter: 7.0 microns

Used fleeces:

1. Polyamide 6 fleece

• Material: polyamide-6; Color white; Basis weight: 29 g

2. V-29lies Filtradur 15 / A3 nonwovens

• Material: 100% polypropylene; Item description: Dur 15100; Color gray; Type: spunbonded; Basis weight: 100 g / m ² ; Air permeability: 1800 l / m ² s.

3. Fleece Fildradur 11 / A3 nonwovens

• Material: 100% polypropylene; Item description: Dur11070; Color white; Type: spunbonded; Basis weight: 70 g / m ² ; Air permeability: 1500 l / m ² s.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited non-patent literature

• Cherif, Ch .: Textile Materials for Lightweight Construction: Techniques - Processes - Materials - Properties; Springer-Verlag Berlin, Heidelberg, 2011 [0003]
• Högemann, W .: Reifenhäuser Reicofil is developing a rollable alternative to organic sheet, www.reifenhauser.com/en/news/reifenhaeuser_reicofil_developed_a_rollable_alternative_to_mm_organoblech, Press Release dated 02.07.2013 [0004]
• Company Presentation TeXtreme®: "UD Tapes". http://www.textreme.com/b2b/products/ud-tapes [0005]
• Kausch, M .; Kroll, L .; Heinrich, HJ .: Thermoplastic prepregs for the high-performance sector. Proceedings of the 12th Chemnitzer Textiltechnik Conference 2009, pp. 250-256 [0005]
• Vettermann, F .; Wegner, A .: Fiber spreading system for the production of dry UD materials. Proceeding of the 13th Chemnitzer Textiltechnik-Tagung 2012, p. 273-256 [0005]

Claims (10)

Process for producing a fiber-plastic composite, preferably fiber-plastic composite semifinished product, which comprises the following steps: Providing only one reinforcing fiber roving, - Struts of reinforcing fiber roving and - Winding the spread reinforcing fiber roving on a plastic matrix which is applied to a winding core. A method according to claim 1, characterized in that in the winding longitudinal sections of the spread Verstärkungsfaserrovings are sequentially deposited on the plastic matrix. A method according to claim 1 or 2, characterized in that during the winding longitudinal sections of the spread Verstärkungsfaserrovings parallel to each other, preferably stacked on impact, are deposited on the plastic matrix. Method according to one of the preceding claims, characterized in that the spread Verstärkungsfaserroving is wound only in one layer on the plastic matrix. Method according to one of the preceding claims, characterized in that during winding or after winding of the spread Verstärkungsfaserroving and the plastic matrix materially and preferably binder and / or solvent-free on the winding core to obtain a wound fiber-plastic composite are joined together. Method according to one of the preceding claims, characterized in that after winding the reinforcing fiber roving and preferably after a cohesive bonding of plastic matrix and reinforcing fiber roving on the winding core at least one further plastic matrix is wound onto the reinforcing fiber roving. A method according to claim 6, characterized in that the at least one further plastic matrix and the Verstärkungsfaserroving during winding of the at least one further plastic matrix or after winding the at least one further plastic matrix cohesively and preferably binder and / or solvent-free on the winding core to obtain a wound Fiber-plastic composite can be interconnected. A method according to claim 5 or 7, characterized in that the wound fiber-plastic composite along the winding core axis severed, preferably cut, is. Process for producing a fiber-plastic composite (FKV), which comprises the following steps: Winding a plastic matrix on or around a winding core, preferably on or around a naked one, i. blank, hub, and - Wrap only a spread reinforcing fiber roving on or around the wound plastic matrix. Method according to claim 9, further characterized by at least one of the features of the characterizing part of the preceding claims.

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