[go: up one dir, main page]

WO2020169266A1 - Tubular, triaxially braided fiber preform having additional, locally limited fiber layers - Google Patents

Tubular, triaxially braided fiber preform having additional, locally limited fiber layers Download PDF

Info

Publication number
WO2020169266A1
WO2020169266A1 PCT/EP2020/050641 EP2020050641W WO2020169266A1 WO 2020169266 A1 WO2020169266 A1 WO 2020169266A1 EP 2020050641 W EP2020050641 W EP 2020050641W WO 2020169266 A1 WO2020169266 A1 WO 2020169266A1
Authority
WO
WIPO (PCT)
Prior art keywords
semi
fiber product
fiber
finished
additional
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2020/050641
Other languages
German (de)
French (fr)
Inventor
Daniel Heim
Lin MOELLENHOFF
Sebastian Schaper
Michael Steinhilber
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of WO2020169266A1 publication Critical patent/WO2020169266A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
    • B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
    • B29C70/24—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least three directions forming a three dimensional structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B29C70/08—Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, and with or without non-reinforced layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00—Producing tubular articles
    • B29D23/001—Pipes; Pipe joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D99/00—Subject matter not provided for in other groups of this subclass
    • B29D99/0003—Producing profiled members, e.g. beams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B32B1/08—Tubular products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/024—Woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/026—Knitted fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/028—Net structure, e.g. spaced apart filaments bonded at the crossing points
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04C—BRAIDING OR MANUFACTURE OF LACE, INCLUDING BOBBIN-NET OR CARBONISED LACE; BRAIDING MACHINES; BRAID; LACE
    • D04C1/00—Braid or lace, e.g. pillow-lace; Processes for the manufacture thereof
    • D04C1/06—Braid or lace serving particular purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/22—Tubes or pipes, i.e. rigid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/04—4 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/20—All layers being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/44—Number of layers variable across the laminate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/021—Fibrous or filamentary layer
    • B32B2260/023—Two or more layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04—Impregnation, embedding, or binder material
    • B32B2260/046—Synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0261—Polyamide fibres
    • B32B2262/0269—Aromatic polyamide fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/106—Carbon fibres, e.g. graphite fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/54—Yield strength; Tensile strength
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B32B2605/08—Cars
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2403/00—Details of fabric structure established in the fabric forming process
    • D10B2403/02—Cross-sectional features
    • D10B2403/024—Fabric incorporating additional compounds
    • D10B2403/0241—Fabric incorporating additional compounds enhancing mechanical properties
    • D10B2403/02411—Fabric incorporating additional compounds enhancing mechanical properties with a single array of unbent yarn, e.g. unidirectional reinforcement fabrics
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2505/00—Industrial
    • D10B2505/02—Reinforcing materials; Prepregs

Definitions

  • the invention relates to a tubular semi-finished fiber product, a fiber-reinforced plastic hollow profile, a method for producing a fiber semi-finished product and a method for producing a fiber-reinforced plastic hollow profile.
  • Fiber-reinforced plastic hollow profiles are known and are used, for example, as body components.
  • tubular fiber semi-finished products are used in which one or more layers of reinforcing fibers are arranged to form a preform that is similar to the later profile shape.
  • the semi-finished fiber product is then processed further to form a fiber-reinforced plastic component by infiltration with a plastic matrix, consolidation and / or curing of the same.
  • the cross section, the wall thickness and the material of the hollow profile result in a specific moment of bending resistance.
  • a tubular semi-finished fiber product is specified with at least one layer of reinforcing fibers, which is designed as a triaxial braid.
  • an additional, locally delimited fiber layer is arranged in at least one peripheral portion of the semi-finished product.
  • the semifinished fiber product - viewed along its circumference - has at least one partial area that is locally reinforced by an additional fiber layer.
  • the additional fiber layer extends in the circumferential direction preferably as far as the first partial area extends and over the entire length of the semifinished fiber product.
  • the semifinished fiber product thus has a strip-shaped local reinforcement. If the semi-finished fiber product is further processed into a fiber-reinforced plastic hollow profile by infiltration, consolidation and / or hardening of a matrix material, this component has increased stiffness and strength in the sub-area with a wall section that is thicker than the rest of the component. In this way, a component can be created in a particularly simple manner that shows different behavior in different loading directions.
  • the proposed semi-finished fiber product enables a load-appropriate construction of the component and the targeted use of material as required.
  • the semi-finished fiber product is tubular.
  • tubular is intended to describe an elongated hollow body, the length of which is many times greater than its height or width.
  • the cross-sectional shape of the tubular semi-finished fiber product is not limited to an annular shape. In addition to round cross-sections, oval or square, for example four-cornered or polygonal, cross-sections are also possible.
  • the semifinished fiber product has at least one layer of a triaxial braid.
  • the filaments of the braid are preferably aligned along the longitudinal axis of the semifinished fiber product, they preferably run in an angle range of + 1-5 degrees to the longitudinal axis of the semifinished fiber product.
  • the standing threads can be single filaments.
  • the standing threads are fiber bundles (rovings) in which several or a large number of individual filaments are bundled.
  • standing threads made of the same material and of the same fineness are used throughout the braid.
  • the standing threads are carbon fibers, whereby a high level of rigidity and strength of the semi-finished fiber product or of the resulting fiber-reinforced component can be achieved.
  • the additional fiber layer can be at least one roving in the longitudinal direction of the semifinished fiber product.
  • the additional fiber layer can e.g. be designed as a fabric, braid or knitted fabric. A good reinforcement effect with particularly efficient use of material can be achieved in one embodiment in that the additional fiber layer is a unidirectional scrim in the longitudinal direction of the semi-finished fiber.
  • the additional fiber layer is preferably made up of carbon fibers, the use of other reinforcing fibers also being conceivable in principle.
  • the semifinished fiber product can have two or more layers of reinforcing fibers, preferably each as a triaxial braid, and two or more additional fiber layers that are alternately layered on top of each other. If several additional fiber layers are provided, then these are preferably formed in the same partial area so that they are aligned one above the other on the circumference.
  • the semi-finished fiber product can have exactly one first sub-area and a further, second sub-area on the circumference, so that the cross section is divided into two.
  • the additional fiber layer is formed in the first partial area, the second partial area is free of the additional fiber layer.
  • two first and two second partial areas can be seen before.
  • the partial areas can have the same size and e.g. have the same number of rovings or be of different sizes, so that e.g. one sub-area has more rovings than another sub-area.
  • a fiber-reinforced plastic hollow profile which contains a fiber semifinished product according to the invention.
  • the semi-finished fiber product is then integrated into a plastic matrix.
  • the plastic matrix can be a thermoplastic plastic material or a thermosetting plastic material.
  • the fiber-reinforced plastic hollow profile is preferably a vehicle component, such as a body component.
  • a method for producing a semi-finished fiber product as described above is specified. The procedure includes the steps:
  • a particularly efficient method is provided if reinforcing fibers are also guided in the braiding process in order to produce the locally delimited fiber layer in such a way that they are fixed on the braided core by the braid.
  • the additional fiber layer can thus be formed simply and without an additional process step.
  • More than one braid layer can be applied to the braided core, for example the mandrel can be passed several times through a braiding system so that a multi-layer braid is formed. If, as described above, an additional fiber layer is also formed, the result is a multi-layer structure in which each braid layer is underlaid by an additional fiber layer in the first partial area.
  • the procedure includes the steps:
  • the method is particularly preferably an RTM process (Resin Transfer Molding).
  • RTM process Resin Transfer Molding
  • the method can be used for the production of the fiber semis and fiber-reinforced plastic hollow profile according to the invention and as such it aims at the technical effects and advantages described for this purpose.
  • Figure 1 is a side view of an exemplary semi-finished fiber product
  • FIG. 2 a sectional view of the semifinished fiber product from FIG. 1,
  • Figure 3 is a sectional view of an exemplary fiber-reinforced
  • FIG. 4 shows an exemplary process sequence
  • FIG. 1 shows a side view of a tubular semifinished fiber product 10 in the form of a triaxial braided tube which is braided onto a braided core 2.
  • the semi-finished fiber product 10 includes at least one layer of a tri-axial braid 12 with longitudinal threads 14, so-called standing threads, which are braided by braiding threads 16, only individual longitudinal threads and braiding threads being provided with reference numerals.
  • longitudinal threads 14 it can are single filaments, but preferably the longitudinal threads 14 are fiber bundles, so-called rovings.
  • the semi-finished fiber product 10 has two first partial areas in which an additional fiber layer 18 is arranged on the braided core 2 below the braid layer, as shown by way of example in FIG.
  • the additional fiber layer 18 is designed to be locally limited, so that the remaining, second partial areas II of the semifinished fiber product are free of the additional fiber layer.
  • the additional fiber layer is e.g. designed as a unidirectional scrim along the longitudinal axis of the semi-finished fiber product and can e.g. be made of carbon fibers.
  • FIG. 2 shows a sectional view of the semifinished fiber product from FIG. 1. Due to the additional fiber layer 18, the first partial areas I have a greater wall thickness than the second partial areas II and correspondingly greater strength in the finished component.
  • FIG. 3 shows a sectional view of a fiber-reinforced plastic hollow profile 1, FIG. 3 showing a plastic hollow profile 1 with the semifinished fiber product 10 from FIG. 2.
  • the semi-finished fiber product 10 is embedded in a plastic matrix 20 to form the fiber-reinforced plastic hollow profile 1. Due to the local reinforcement, the plastic hollow profile faces the first
  • Subareas I have a greater wall thickness, higher rigidity and higher strength.
  • the semi-finished fiber product 10 is shown with only a single braid layer and only one additional fiber layer.
  • additional fiber layer can be formed, for example, by repeating the process two or more braid layers on top of one another, with the first subregions of each layer preferably being arranged one above the other in alignment. It is also possible for an additional layer and a mesh layer to be alternately arranged one above the other.
  • the semi-finished fiber product 10 can contain further layers of reinforcing fibers, e.g. in the form of further braid layers and / or fabrics or scrims.
  • further layers of reinforcing fibers e.g. in the form of further braid layers and / or fabrics or scrims.
  • Other than the round cross-section shown are also conceivable, e.g. polygonal cross-sections.
  • FIG. 4 shows a schematic sequence of an exemplary method.
  • a braided core is provided and a braid layer of a triaxial braid is braided onto it.
  • the additional fiber layer e.g. trained as a clutch.
  • additional longitudinal fibers are carried along in the braiding process between the braided tube and the braided core, so that they are laid as a scrim on the mold core and are fixed on the braided core by the braided tube. If necessary, step 100 is repeated (several times).
  • the semi-finished fiber product thus produced can be processed further in step 200 to form a fiber-reinforced hollow plastic component.
  • the semifinished fiber product is infiltrated with a matrix material and the matrix material is consolidated and / or cured.
  • the matrix material is a thermoset matrix material that is injected into the semi-finished fiber product in an RTM process and cured.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Manufacturing & Machinery (AREA)
  • Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

The invention relates to a tubular fiber preform having at least one layer of reinforcing fibers that is formed as a triaxial braid (12). In at least one circumferential portion (I) of the fiber preform (10) an additional, locally limited fiber layer (18) is arranged. The invention also relates to a fiber-reinforced hollow plastic profile and to a method for producing the fiber preform and the fiber-reinforced hollow plastic profile.

Description

Beschreibung description

ROHRFÖRMIGES, TRIAXIAL GEFLOCHTENES FASERHALBZEUG MIT TUBE-SHAPED, TRIAXIAL BRAIDED FIBER SEMI-FIBER PRODUCT WITH

ZUSÄTZLICHEN, LOKAL BEGRENZTEN FASERSCHICHTEN ADDITIONAL, LOCALLY LIMITED FIBER LAYERS

Die Erfindung betrifft ein rohrförmiges Faserhalbzeug, ein faserverstärktes Kunststoffhohlprofil, ein Verfahren zur Herstellung eines Faserhalbzeugs und ein Verfahren zur Herstellung eines faserverstärkten Kunststoffhohlprofils. The invention relates to a tubular semi-finished fiber product, a fiber-reinforced plastic hollow profile, a method for producing a fiber semi-finished product and a method for producing a fiber-reinforced plastic hollow profile.

Faserverstärkte Kunststoffhohlprofile sind bekannt und werden beispiels weise als Karosseriebauteile eingesetzt. Zur Herstellung der Kunststoffhohl profile werden rohrförmige Faserhalbzeuge verwendet, bei denen eine oder mehrere Lagen von Verstärkungsfasern zu einer Preform angeordnet sind, die ähnlich der späteren Profilform ist. Das Faserhalbzeug wird dann durch Infiltration mit einer Kunststoffmatrix, Konsolidierung und/oder Aushärten der selben zum faserverstärkten Kunststoffbauteil weiterverarbeitet. Fiber-reinforced plastic hollow profiles are known and are used, for example, as body components. To produce the plastic hollow profile, tubular fiber semi-finished products are used in which one or more layers of reinforcing fibers are arranged to form a preform that is similar to the later profile shape. The semi-finished fiber product is then processed further to form a fiber-reinforced plastic component by infiltration with a plastic matrix, consolidation and / or curing of the same.

Bei Hohlprofilen ergibt sich aufgrund des Querschnitts, der Wandstärke und des Materials des Hohlprofils ein spezifisches Biegewiderstandsmoment. In the case of hollow profiles, the cross section, the wall thickness and the material of the hollow profile result in a specific moment of bending resistance.

Vor diesem Hintergrund ist es die Aufgabe der vorliegenden Erfindung eine Möglichkeit anzugeben, wie ein Faserhalbzeug und ein faserverstärktes Kunststoffhohlprofil mit verbesserten mechanischen Eigenschaften bei effizi entem Materialeinsatz hergestellt werden kann. Against this background, it is the object of the present invention to provide a possibility of how a fiber semifinished product and a fiber-reinforced plastic hollow profile with improved mechanical properties can be produced with efficient use of material.

Gelöst wird die Aufgabe durch ein Faserhalbzeug nach Patentanspruch 1 , ein faserverstärktes Kunststoffhohlprofil nach Patentanspruch 8, ein Verfah ren zur Herstellung eines Faserhalbzeugs nach Patentanspruch 10 und ein Verfahren zur Herstellung eines faserverstärkten Kunststoffhohlprofils nach Patentanspruch 12. Weitere vorteilhafte Ausgestaltungen ergeben sich aus den Unteransprüchen und der nachfolgenden Beschreibung. The object is achieved by a semifinished fiber product according to claim 1, a fiber-reinforced plastic hollow profile according to claim 8, a procedural ren for producing a fiber semifinished product according to claim 10 and a method for producing a fiber-reinforced plastic hollow profile Claim 12. Further advantageous embodiments emerge from the subclaims and the following description.

Es wird ein rohrförmiges Faserhalbzeug angegeben mit mindestens einer Lage von Verstärkungsfasern, die als triaxiales Geflecht ausgebildet ist. Er findungsgemäß ist in wenigstens einem umfangsseitigen Teilbereich des Fa serhalbzeugs eine zusätzliche, lokal begrenzte Faserschicht angeordnet. A tubular semi-finished fiber product is specified with at least one layer of reinforcing fibers, which is designed as a triaxial braid. According to the invention, an additional, locally delimited fiber layer is arranged in at least one peripheral portion of the semi-finished product.

Mit anderen Worten gesagt weist das Faserhalbzeug - entlang seines Um fangs betrachtet - mindestens einen Teilbereich auf, der durch eine zusätzli che Faserschicht lokal verstärkt ist. Die zusätzliche Faserschicht erstreckt sich in Umfangsrichtung vorzugsweise so weit, wie der erste Teilbereich reicht und über die gesamte Länge des Faserhalbzeugs. Das Faserhalbzeug weist also eine streifenförmige lokale Verstärkung auf. Wird das Faserhalb zeug durch Infiltration, Konsolidierung und/oder Aushärten eines Matrixmate rials zu einem faserverstärkten Kunststoffhohlprofil weiterverarbeitet, so weist dieses Bauteil in dem Teilbereich einen gegenüber dem restlichen Bauteil di ckeren Wandabschnitt eine erhöhte Steifigkeit und Festigkeit auf. Derart lässt sich auf besonders einfache Art und Weise ein Bauteil schaffen, das in unter schiedlichen Belastungsrichtungen unterschiedliche Verhalten zeigt. Das vor geschlagene Faserhalbzeug ermöglicht eine belastungsgerechte Konstruk tion des Bauteils und den gezielten bedarfsgerechten Einsatz von Material. In other words, the semifinished fiber product - viewed along its circumference - has at least one partial area that is locally reinforced by an additional fiber layer. The additional fiber layer extends in the circumferential direction preferably as far as the first partial area extends and over the entire length of the semifinished fiber product. The semifinished fiber product thus has a strip-shaped local reinforcement. If the semi-finished fiber product is further processed into a fiber-reinforced plastic hollow profile by infiltration, consolidation and / or hardening of a matrix material, this component has increased stiffness and strength in the sub-area with a wall section that is thicker than the rest of the component. In this way, a component can be created in a particularly simple manner that shows different behavior in different loading directions. The proposed semi-finished fiber product enables a load-appropriate construction of the component and the targeted use of material as required.

Das Faserhalbzeug ist rohrförmig ausgebildet. Der Begriff„rohrförmig“ soll dabei einen langgestreckten Hohlkörper beschreiben, dessen Länge um ein Vielfaches größer ist als seine Höhe oder Breite. Die Querschnittsform des rohrförmigen Faserhalbzeugs ist nicht auf eine ringförmige Form beschränkt. Neben runden Querschnitten sind z.B. auch ovale oder eckige, z.B. vier eckige oder mehreckige Querschnitte möglich. Das Faserhalbzeug weist mindestens eine Lage eines triaxialen Geflechts auf. Die Stehfäden des Geflechts sind vorzugsweise entlang der Längsachse des Faserhalbzeugs ausgerichtet, sie verlaufen vorzugsweise in einem Win kelbereich von +1-5 Grad zur Längsachse des Faserhalbzeugs. The semi-finished fiber product is tubular. The term "tubular" is intended to describe an elongated hollow body, the length of which is many times greater than its height or width. The cross-sectional shape of the tubular semi-finished fiber product is not limited to an annular shape. In addition to round cross-sections, oval or square, for example four-cornered or polygonal, cross-sections are also possible. The semifinished fiber product has at least one layer of a triaxial braid. The filaments of the braid are preferably aligned along the longitudinal axis of the semifinished fiber product, they preferably run in an angle range of + 1-5 degrees to the longitudinal axis of the semifinished fiber product.

Bei den Stehfäden kann es sich um Einzelfilamente handeln. Zur Erreichung der im Automobilbau erforderlichen mechanischen Anforderungen handelt es sich in einer bevorzugten Ausgestaltung bei den Stehfäden um Faserbündel (Rovings), in denen mehrere oder eine Vielzahl von Einzelfilamenten gebün delt sind. Vorzugsweise werden im gesamten Geflecht Stehfäden aus dem gleichen Material und mit der gleichen Feinheit verwendet. The standing threads can be single filaments. In order to achieve the mechanical requirements required in automobile construction, in a preferred embodiment, the standing threads are fiber bundles (rovings) in which several or a large number of individual filaments are bundled. Preferably, standing threads made of the same material and of the same fineness are used throughout the braid.

Als Stehfäden und als Verstärkungsfasern können gängige Verstärkungsfa sern, wie z.B. Glasfasern, Kohlenstofffasern oder Aramidfasern verwendet werden. Vorzugsweise sind die Stehfäden jedoch Kohlenstofffasern, wodurch sich eine hohe Steifigkeit und Festigkeit des Faserhalbzeugs bzw. des resul tierenden faserverstärkten Bauteils erzielen lässt. Conventional reinforcing fibers, such as e.g. Glass fibers, carbon fibers or aramid fibers can be used. Preferably, however, the standing threads are carbon fibers, whereby a high level of rigidity and strength of the semi-finished fiber product or of the resulting fiber-reinforced component can be achieved.

Bei der zusätzlichen Faserschicht kann es sich um mindestens einen Roving in Längsrichtung des Faserhalbzeugs handeln. Die zusätzliche Faserschicht kann z.B. als Gewebe, Geflecht oder Gestrick ausgebildet sein. Eine gute Verstärkungswirkung bei besonders effizientem Materialeinsatz kann in einer Ausgestaltung dadurch erreicht werden, dass es sich bei der zusätzlichen Faserschicht um ein unidirektionales Gelege in Längsrichtung des Faserhalb zeugs handelt. The additional fiber layer can be at least one roving in the longitudinal direction of the semifinished fiber product. The additional fiber layer can e.g. be designed as a fabric, braid or knitted fabric. A good reinforcement effect with particularly efficient use of material can be achieved in one embodiment in that the additional fiber layer is a unidirectional scrim in the longitudinal direction of the semi-finished fiber.

Zur Erzielung einer hohen mechanischen Verstärkungswirkung ist die zusätz liche Faserschicht vorzugsweise aus Kohlenstofffasern aufgebaut, wobei grundsätzlich auch der Einsatz anderer Verstärkungsfasern denkbar ist. Zur Erzielung höherer Wandstärken, höheren Steifigkeiten und höheren Bau teilfestigkeiten kann das Faserhalbzeug zwei oder mehr Schichten von Ver stärkungsfasern, vorzugsweise jeweils als triaxiales Geflecht, und zwei oder mehr zusätzliche Faserschichten aufweisen, die jeweils abwechselnd überei nander geschichtet sind. Werden mehrere zusätzliche Faserschichten vorge sehen, so werden diese vorzugsweise in demselben Teilbereich ausgebildet, so dass sie umfangsseitig fluchtend übereinander liegen. In order to achieve a high mechanical reinforcement effect, the additional fiber layer is preferably made up of carbon fibers, the use of other reinforcing fibers also being conceivable in principle. To achieve higher wall thicknesses, higher rigidity and higher structural strengths, the semifinished fiber product can have two or more layers of reinforcing fibers, preferably each as a triaxial braid, and two or more additional fiber layers that are alternately layered on top of each other. If several additional fiber layers are provided, then these are preferably formed in the same partial area so that they are aligned one above the other on the circumference.

Das Faserhalbzeug kann umfangsseitig genau einen ersten Teilbereich und einen weiteren, zweiten Teilbereich aufweisen, so dass der Querschnitt zwei geteilt ist. Im ersten Teilbereich ist die zusätzliche Faserschicht ausgebildet, der zweite Teilbereich ist frei von der zusätzlichen Faserschicht. Es ist jedoch in einer Ausgestaltung auch möglich, dass das Faserhalbzeug umfangsseitig mehr als einen ersten Teilbereich und mehr als einen zweiten Teilbereich aufweist. Beispielsweise können zwei erste und zwei zweite Teilbereiche vor gesehen sein. Am Beispiel eines Hohlprofils in einem Dachrahmen kann z.B. eine gezielte Verstärkung von Druck- und Zuggurt erfolgen. Auch das Vorse hen von drei oder mehr ersten bzw. zweiten Teilbereichen ist denkbar. Die Teilbereiche können die gleiche Größe haben und z.B. die gleiche Anzahl von Rovings aufweisen oder unterschiedlich groß ausgebildet sein, so dass z.B. ein Teilbereich mehr Rovings aufweist als ein anderer Teilbereich. The semi-finished fiber product can have exactly one first sub-area and a further, second sub-area on the circumference, so that the cross section is divided into two. The additional fiber layer is formed in the first partial area, the second partial area is free of the additional fiber layer. In one embodiment, however, it is also possible for the semifinished fiber product to have more than a first partial area and more than a second partial area on the circumference. For example, two first and two second partial areas can be seen before. Using the example of a hollow profile in a roof frame, e.g. a targeted reinforcement of the compression and tension belt. The provision of three or more first or second partial areas is also conceivable. The partial areas can have the same size and e.g. have the same number of rovings or be of different sizes, so that e.g. one sub-area has more rovings than another sub-area.

Weiterhin wird ein faserverstärktes Kunststoffhohlprofil angegeben, das ein erfindungsgemäßes Faserhalbzeug beinhaltet. Das Faserhalbzeug ist dann in eine Kunststoffmatrix eingebunden. Die Kunststoffmatrix kann ein thermo plastisches Kunststoffmaterial oder ein duroplastisches Kunststoffmaterial sein. Bei dem faserverstärkten Kunststoffhohlprofil handelt es sich vorzugs weise um ein Fahrzeugbauteil, wie z.B. ein Karosseriebauteil. Weiterhin wird ein Verfahren zur Herstellung eines wie voranstehend be schriebenen Faserhalbzeugs angegeben. Das Verfahren beinhaltet die Schritte: Furthermore, a fiber-reinforced plastic hollow profile is specified which contains a fiber semifinished product according to the invention. The semi-finished fiber product is then integrated into a plastic matrix. The plastic matrix can be a thermoplastic plastic material or a thermosetting plastic material. The fiber-reinforced plastic hollow profile is preferably a vehicle component, such as a body component. Furthermore, a method for producing a semi-finished fiber product as described above is specified. The procedure includes the steps:

Bereitstellen eines Flechtkerns, Providing a braided core,

Anordnen einer umfangsseitig lokal begrenzten Faserschicht auf dem Flecht kern in wenigstens einem ersten umfangsseitigen Teilbereich und Arranging a circumferentially locally delimited fiber layer on the braided core in at least one first circumferential partial area and

Aufflechten eines triaxialen Geflechts auf den Flechtkern. Braiding a triaxial braid on the braid core.

Ein besonders effizientes Verfahren ist gegeben, wenn zur Erzeugung der lo kal begrenzten Faserschicht Verstärkungsfasern im Flechtprozess derart mit geführt werden, dass sie durch das Geflecht auf dem Flechtkern fixiert wer den. So lässt sich die zusätzliche Faserschicht einfach und ohne zusätzli chen Verfahrensschritt ausbilden. A particularly efficient method is provided if reinforcing fibers are also guided in the braiding process in order to produce the locally delimited fiber layer in such a way that they are fixed on the braided core by the braid. The additional fiber layer can thus be formed simply and without an additional process step.

Auf den Flechtkern kann mehr als eine Geflechtlage aufgebracht werden, beispielsweise kann der Formkern mehrmals durch eine Flechtanlage geführt werden, so dass ein mehrlagiges Geflecht ausgebildet wird. Wird dabei, wie voranstehend beschrieben, auch eine zusätzliche Faserschicht ausgebildet, so ergibt sich ein mehrlagiger Aufbau, in dem jede Geflechtlage im ersten Teilbereich von einer zusätzlichen Faserschicht unterlegt ist. More than one braid layer can be applied to the braided core, for example the mandrel can be passed several times through a braiding system so that a multi-layer braid is formed. If, as described above, an additional fiber layer is also formed, the result is a multi-layer structure in which each braid layer is underlaid by an additional fiber layer in the first partial area.

Weiterhin wird ein Verfahren zur Herstellung eines faserverstärkten Kunst stoffhohlprofils angegeben. Das Verfahren beinhaltet die Schritte: Furthermore, a method for producing a fiber-reinforced plastic hollow profile is specified. The procedure includes the steps:

Erzeugen eines Faserhalbzeugs mit dem voranstehend beschriebenen Ver fahren, Imprägnieren des Faserhalbzeugs mit einem thermoplastischen oder duroplastischen Kunststoffmaterial, Konsolidierung und/oder Aushärten des Kunststoffmaterials. Besonders bevorzugt handelt es sich bei dem Verfahren um einen RTM-Prozess (Resin Transfer Moulding). Die Verfahren können zur Herstellung des erfindungsgemäßen Faserhalb zeugs und faserverstärkten Kunststoffhohlprofils verwendet werden und er zielen als solche die hierzu beschriebenen technischen Wirkungen und Vor teile. Generate a semi-finished fiber product with the above-described method, impregnate the semi-finished fiber product with a thermoplastic or thermosetting plastic material, consolidate and / or harden the plastic material. The method is particularly preferably an RTM process (Resin Transfer Molding). The method can be used for the production of the fiber semis and fiber-reinforced plastic hollow profile according to the invention and as such it aims at the technical effects and advantages described for this purpose.

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung, in der unter Bezugnahme auf die Zeich nungen Ausführungsbeispiele der Erfindung im Einzelnen beschrieben sind. Dabei können die in den Ansprüchen und in der Beschreibung erwähnten Merkmale jeweils einzeln für sich oder in beliebiger Kombination erfindungs wesentlich sein. Sofern in dieser Anmeldung der Begriff "kann" verwendet wird, handelt es sich sowohl um die technische Möglichkeit als auch um die tatsächliche technische Umsetzung. Further advantages, features and details of the invention emerge from the following description, in which embodiments of the invention are described in detail with reference to the drawings. The features mentioned in the claims and in the description can be essential to the invention individually or in any combination. If the term “can” is used in this application, it concerns both the technical possibility and the actual technical implementation.

Im Folgenden werden Ausführungsbeispiele an Hand der beiliegenden Zeichnungen erläutert. Darin zeigen in schematischer Ansicht: In the following, exemplary embodiments are explained using the accompanying drawings. They show in a schematic view:

Figur 1 eine Seitenansicht eines beispielhaften Faserhalbzeugs,Figure 1 is a side view of an exemplary semi-finished fiber product,

Figur 2 eine Schnittansicht des Faserhalbzeugs aus Figur 1 ,FIG. 2 a sectional view of the semifinished fiber product from FIG. 1,

Figur 3 eine Schnittansicht eines beispielhaften faserverstärkter Figure 3 is a sectional view of an exemplary fiber-reinforced

Kunststoffbauteils und Plastic component and

Figur 4 ein beispielhafter Verfahrensablauf. FIG. 4 shows an exemplary process sequence.

Figur 1 zeigt eine Seitenansicht eines rohrförmigen Faserhalbzeugs 10 in Form eines triaxialen Geflechtschlauchs, der auf einen Flechtkern 2 aufge flochten ist. Das Faserhalbzeug 10 beinhaltet mindestens eine Lage eines tri axialen Geflechts 12 mit Längsfäden 14, sogenannten Stehfäden, die von Flechtfäden 16 umflochten sind, wobei nur einzelne Längsfäden und Flecht fäden mit Bezugszeichen versehen sind. Bei den Längsfäden 14 kann es sich um Einzelfilamente handeln, vorzugsweise sind die Längsfäden 14 je doch Faserbündel, sogenannte Rovings. FIG. 1 shows a side view of a tubular semifinished fiber product 10 in the form of a triaxial braided tube which is braided onto a braided core 2. The semi-finished fiber product 10 includes at least one layer of a tri-axial braid 12 with longitudinal threads 14, so-called standing threads, which are braided by braiding threads 16, only individual longitudinal threads and braiding threads being provided with reference numerals. With the longitudinal threads 14 it can are single filaments, but preferably the longitudinal threads 14 are fiber bundles, so-called rovings.

Das Faserhalbzeug 10 weist zwei erste Teilbereiche auf, in denen unter der Geflechtlage noch eine zusätzliche Faserschicht 18 auf dem Flechtkern 2 an geordnet ist, wie exemplarisch in Figur 2 gezeigt. Die zusätzliche Faser schicht 18 ist lokal begrenzt ausgebildet, so dass die restlichen, zweiten Teil bereiche II des Faserhalbzeugs frei von der zusätzlichen Faserschicht sind. Die zusätzliche Faserschicht ist z.B. als unidirektionales Gelege entlang der Längsachse des Faserhalbzeugs ausgebildet und kann z.B. aus Kohlenstoff fasern ausgebildet sein. The semi-finished fiber product 10 has two first partial areas in which an additional fiber layer 18 is arranged on the braided core 2 below the braid layer, as shown by way of example in FIG. The additional fiber layer 18 is designed to be locally limited, so that the remaining, second partial areas II of the semifinished fiber product are free of the additional fiber layer. The additional fiber layer is e.g. designed as a unidirectional scrim along the longitudinal axis of the semi-finished fiber product and can e.g. be made of carbon fibers.

In dem Beispiel aus Figur 1 bzw. 2 sind jeweils zwei erste und zwei zweite Teilbereiche I, II vorgesehen, die sich umfangsseitig abwechseln. In jedem Teilbereich I bzw. Teilbereich II sind mehrere gleiche Längsfäden 14 neben einander angeordnet. Figur 2 zeigt eine Schnittansicht des Faserhalbzeugs aus Figur 1. Aufgrund der zusätzlichen Faserschicht 18 haben die ersten Teilbereiche I eine größere Wandstärke als die zweiten Teilbereiche II und entsprechend eine größere Festigkeit im fertigen Bauteil. In the example from FIGS. 1 and 2, two first and two second partial areas I, II are provided, which alternate on the circumference. In each sub-area I or sub-area II, several identical longitudinal threads 14 are arranged next to one another. FIG. 2 shows a sectional view of the semifinished fiber product from FIG. 1. Due to the additional fiber layer 18, the first partial areas I have a greater wall thickness than the second partial areas II and correspondingly greater strength in the finished component.

Figur 3 zeigt eine Schnittansicht eines faserverstärkten Kunststoffhohlprofils 1 , wobei Figur 3 ein Kunststoffhohlprofil 1 mit dem Faserhalbzeug 10 aus Fi gur 2 zeigt. Das Faserhalbzeug 10 ist in einer Kunststoffmatrix 20 eingebun den zum faserverstärkten Kunststoffhohlprofil 1. Bedingt durch die lokale Verstärkung weist das Kunststoffhohlprofil in den ersten FIG. 3 shows a sectional view of a fiber-reinforced plastic hollow profile 1, FIG. 3 showing a plastic hollow profile 1 with the semifinished fiber product 10 from FIG. 2. The semi-finished fiber product 10 is embedded in a plastic matrix 20 to form the fiber-reinforced plastic hollow profile 1. Due to the local reinforcement, the plastic hollow profile faces the first

Teilbereichen I eine größere Wandstärke, höhere Steifigkeit und höhere Fes tigkeit auf. Subareas I have a greater wall thickness, higher rigidity and higher strength.

In den Figuren ist das Faserhalbzeug 10 mit nur einer einzigen Geflechtlage und nur einer zusätzlichen Faserschicht dargestellt. Zur Erzielung größerer Wandstärken können beispielsweise durch Wiederholen des Prozesses zwei oder mehr Geflechtlagen übereinander ausgebildet werden, wobei vorzugs weise die ersten Teilbereiche jeder Schicht fluchtend übereinander angeord net werden. Es können auch eine zusätzliche Schicht und eine Geflechtlage jeweils abwechselnd mehrfach übereinander angeordnet werden. In the figures, the semi-finished fiber product 10 is shown with only a single braid layer and only one additional fiber layer. To achieve greater Wall thicknesses can be formed, for example, by repeating the process two or more braid layers on top of one another, with the first subregions of each layer preferably being arranged one above the other in alignment. It is also possible for an additional layer and a mesh layer to be alternately arranged one above the other.

Zusätzlich kann das Faserhalbzeug 10 weitere Lagen von Verstärkungsfa sern, z.B. in Form weiterer Geflechtlagen und/oder Gewebe oder Gelege be inhalten. Ebenso sind andere als der gezeigte runde Querschnitt denkbar, z.B. mehreckige Querschnitte. In addition, the semi-finished fiber product 10 can contain further layers of reinforcing fibers, e.g. in the form of further braid layers and / or fabrics or scrims. Other than the round cross-section shown are also conceivable, e.g. polygonal cross-sections.

Figur 4 zeigt einen schematischen Ablauf eines beispielhaften Verfahrens. Zunächst wird in Schritt 100 ein Flechtkern bereitgestellt und eine Geflecht lage eines triaxialen Geflechts auf diesen aufgeflochten. In diesem Schritt wird auch die zusätzliche Faserschicht, z.B. als Gelege mit ausgebildet. Bei spielsweise werden zusätzliche Längsfasern im Flechtprozess zwischen Flechtschlauch und Flechtkern mitgeführt, so dass sie sich als Gelege auf dem Formkern ablegen und durch den Geflechtschlauch auf dem Flechtkern fixiert werden. Bei Bedarf wird Schritt 100 (mehrfach) wiederholt. FIG. 4 shows a schematic sequence of an exemplary method. First, in step 100, a braided core is provided and a braid layer of a triaxial braid is braided onto it. In this step the additional fiber layer, e.g. trained as a clutch. For example, additional longitudinal fibers are carried along in the braiding process between the braided tube and the braided core, so that they are laid as a scrim on the mold core and are fixed on the braided core by the braided tube. If necessary, step 100 is repeated (several times).

Das so entstandene Faserhalbzeug kann in Schritt 200 zu einem faserver stärkten Kunststoffhohlbauteil weiterverarbeitet werden. In The semi-finished fiber product thus produced can be processed further in step 200 to form a fiber-reinforced hollow plastic component. In

Schritt 200 wird das Faserhalbzeug mit einem Matrixmaterial infiltriert und das Matrixmaterial wird konsolidiert und/oder ausgehärtet. Beispielweise handelt es sich um ein duroplastisches Matrixmaterial, das in einem RTM- Prozess dem Faserhalbzeug injiziert und ausgehärtet wird. Bezugszeichenliste In step 200, the semifinished fiber product is infiltrated with a matrix material and the matrix material is consolidated and / or cured. For example, it is a thermoset matrix material that is injected into the semi-finished fiber product in an RTM process and cured. List of reference symbols

1 faserverstärktes Kunststoffhohlprofil1 fiber-reinforced plastic hollow profile

2 Flechtkern 2 braided core

10 Faserhalbzeug 10 semi-finished fiber products

12 triaxiales Geflecht 12 triaxial braid

14 Stehfäden 14 standing threads

16 Flechtfäden 16 braiding threads

18 zusätzliche Faserschicht 18 additional fiber layer

20 Kunststoffmatrix 20 plastic matrix

I, II Teilbereiche I, II sub-areas

Claims

Patentansprüche Claims 1. Rohrförmiges Faserhalbzeug mit mindestens einer Lage von Verstär kungsfasern, die als triaxiales Geflecht (12) ausgebildet ist, 1. Tubular semi-finished fiber product with at least one layer of reinforcing fibers, which is designed as a triaxial braid (12), dadurch gekennzeichnet, dass characterized in that in wenigstens einem umfangsseitigen Teilbereich (I) des Faserhalbzeugs (10) eine zusätzliche, lokal begrenzte Faserschicht (18) angeordnet ist. an additional, locally delimited fiber layer (18) is arranged in at least one peripheral partial area (I) of the semifinished fiber product (10). 2. Faserhalbzeug nach Patentanspruch 1 , 2. Semi-finished fiber product according to claim 1, wobei es sich bei den Stehfäden (14) des Geflechts jeweils um Faserbündel handelt. wherein the standing threads (14) of the braid are each fiber bundle. 3. Faserhalbzeug nach einem der vorangehenden Patentansprüche, wobei es sich bei den Stehfäden (14) um Kohlenstofffasern handelt. 3. Semi-finished fiber product according to one of the preceding claims, wherein the standing threads (14) are carbon fibers. 3. Faserhalbzeug nach einem der vorangehenden Patentansprüche, wobei es sich bei der zusätzlichen Faserschicht (18) um mindestens einen Roving in Längsrichtung des Faserhalbzeugs handelt. 3. Semi-finished fiber product according to one of the preceding claims, wherein the additional fiber layer (18) is at least one roving in the longitudinal direction of the semi-finished fiber product. 5. Faserhalbzeug nach einem der vorangehenden Patentansprüche, wobei es sich bei der zusätzlichen Faserschicht (18) um ein unidirektionales Gelege in Längsrichtung des Faserhalbzeugs handelt. 5. Semi-finished fiber product according to one of the preceding claims, wherein the additional fiber layer (18) is a unidirectional scrim in the longitudinal direction of the semi-finished fiber product. 6. Faserhalbzeug nach einem der vorangehenden Patentansprüche, wobei die zusätzliche Faserschicht (18) aus Kohlenstofffasern aufgebaut ist. 6. Semi-finished fiber product according to one of the preceding claims, wherein the additional fiber layer (18) is made up of carbon fibers. 7. Faserhalbzeug nach einem der vorangehenden Patentansprüche, wobei das Faserhalbzeug (10) umfangsseitig mehr als einen ersten Teilbe reich (I) aufweist. 8. Faserhalbzeug nach einem der vorangehenden Patentansprüche, wobei das Faserhalbzeug (10) zwei oder mehr Lagen von Verstärkungsfa sern und zwei oder mehr zusätzliche Faserschichten (18) aufweist, die je weils abwechselnd übereinander geschichtet sind. 7. Semi-finished fiber product according to one of the preceding claims, wherein the semi-finished fiber product (10) has more than a first partial area (I) on the circumference. 8. Semifinished fiber product according to one of the preceding claims, wherein the semifinished fiber product (10) has two or more layers of reinforcement fibers and two or more additional fiber layers (18) which are each alternately layered on top of each other. 9. Faserverstärktes Kunststoffhohlprofil, insbesondere Karosseriebauteil, mit einer Kunststoffmatrix (20), in das ein Faserhalbzeug (10) nach einem der voranstehenden Patentansprüche eingebunden ist. 9. Fiber-reinforced plastic hollow profile, in particular a body component, with a plastic matrix (20) into which a semi-finished fiber product (10) according to one of the preceding claims is incorporated. 10. Verfahren zur Herstellung eines Faserhalbzeugs mit den Schritten: Bereitstellen eines Flechtkerns (2), 10. A method for producing a semi-finished fiber product with the following steps: providing a braided core (2), Anordnen einer umfangsseitig lokal begrenzten Faserschicht (18) auf dem Flechtkern in wenigstens einem ersten umfangsseitigen Teilbereich und Aufflechten eines triaxialen Geflechts (12) auf den Flechtkern (2). Arranging a circumferentially locally delimited fiber layer (18) on the braided core in at least a first circumferential partial area and braiding a triaxial braid (12) onto the braided core (2). 11. Verfahren zur Herstellung eines Faserhalbzeugs nach 11. A method for producing a semi-finished fiber product according to Patentanspruch 10, Claim 10, wobei zur Erzeugung der lokal begrenzten Faserschicht (18) Verstärkungsfa sern im Flechtprozess derart mitgeführt werden, dass sie durch das Geflecht (12) auf dem Flechtkern (2) fixiert werden. whereby, in order to produce the locally delimited fiber layer (18), reinforcing fibers are carried along in the braiding process in such a way that they are fixed on the braided core (2) by the braid (12). 12. Verfahren zur Herstellung eines faserverstärkten Kunststoffhohlprofils mit den Schritten: 12. Process for the production of a fiber-reinforced plastic hollow profile with the steps: Erzeugen eines Faserhalbzeugs (10) mit einem Verfahren nach Anspruch 10 oder 11 , Production of a semifinished fiber product (10) with a method according to claim 10 or 11, Imprägnieren des Faserhalbzeugs mit einem thermoplastischen oder duro plastischen Kunststoffmaterial, Impregnation of the semi-finished fiber product with a thermoplastic or thermosetting plastic material, Konsolidieren und/oder Aushärten des Kunststoffmaterials. Consolidating and / or curing the plastic material.
PCT/EP2020/050641 2019-02-21 2020-01-13 Tubular, triaxially braided fiber preform having additional, locally limited fiber layers Ceased WO2020169266A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019104427.8A DE102019104427A1 (en) 2019-02-21 2019-02-21 Tubular semi-finished fiber product, fiber-reinforced plastic hollow profile, method for producing a fiber semi-finished product and method for producing a fiber-reinforced plastic hollow profile
DE102019104427.8 2019-02-21

Publications (1)

Publication Number Publication Date
WO2020169266A1 true WO2020169266A1 (en) 2020-08-27

Family

ID=69167815

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2020/050641 Ceased WO2020169266A1 (en) 2019-02-21 2020-01-13 Tubular, triaxially braided fiber preform having additional, locally limited fiber layers

Country Status (2)

Country Link
DE (1) DE102019104427A1 (en)
WO (1) WO2020169266A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113183496A (en) * 2021-01-29 2021-07-30 宜兴市新立织造有限公司 Three-dimensional braided composite material marine catheter and preparation method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4719837A (en) * 1986-04-17 1988-01-19 E. I. Dupont De Nemours And Company Complex shaped braided structures
US5619903A (en) * 1994-11-30 1997-04-15 Bell Helicopter Textron Inc. Braided preform for composite bodies
US6250193B1 (en) * 1996-12-02 2001-06-26 A & P Technology, Inc. Braided structure with elastic bias strands

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2326103B (en) * 1997-06-11 2001-07-04 You Chin San Fiber-reinforced rodlike article
DE102006004885A1 (en) * 2006-02-03 2007-08-30 Kümpers GmbH & Co. KG Energy-absorbing textile structure, in particular for use in vehicle construction and method for its production
DE102009052263B4 (en) * 2009-11-06 2017-06-22 Airbus Defence and Space GmbH Fiber composite material, production of a textile fabric for this purpose, and components produced therefrom and their use
DE102010010513B4 (en) * 2010-03-05 2014-07-03 ThyssenKrupp Carbon Components GmbH Process for the production of hollow profile-like components from fiber composite materials
DE102011002840A1 (en) * 2011-01-18 2012-07-19 Sgl Carbon Se Fiber-reinforced composite component and method for producing a fiber-reinforced composite component

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4719837A (en) * 1986-04-17 1988-01-19 E. I. Dupont De Nemours And Company Complex shaped braided structures
US5619903A (en) * 1994-11-30 1997-04-15 Bell Helicopter Textron Inc. Braided preform for composite bodies
US6250193B1 (en) * 1996-12-02 2001-06-26 A & P Technology, Inc. Braided structure with elastic bias strands

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113183496A (en) * 2021-01-29 2021-07-30 宜兴市新立织造有限公司 Three-dimensional braided composite material marine catheter and preparation method thereof

Also Published As

Publication number Publication date
DE102019104427A1 (en) 2020-08-27

Similar Documents

Publication Publication Date Title
EP2511084B1 (en) Fibre-reinforced plastic node element and method for producing and using same
EP3052306B1 (en) Fibre composite material component and method for producing a fibre composite material component
DE102014009446B4 (en) Duroplastic FRP structure with a thermoplastic and fiber-reinforced load application element
EP2154401A2 (en) Reinforced plastic fibre pipe
DE102016210040A1 (en) A method for producing an at least partially profiled, fiber-reinforced plastic profile, a profiled, fiber-reinforced plastic profile and its use
DE102011105858A1 (en) Method for manufacturing fiber reinforced plastic pultrusion profile used during manufacture of components of motor vehicle, involves curing plastic material for obtaining fiber reinforced plastic pultrusion profile
EP3495671B1 (en) Connection element for a fibre compound plastic material
DE69319098T2 (en) Fiber reinforced plastic rod and its manufacturing process
DE2021347A1 (en) Process for the production of fiber-reinforced composite bodies
DE102017219774A1 (en) Method and plant for the production of fiber-matrix composite profiles with axially rotating cross-section and adjustable fiber orientation
WO2018083307A1 (en) Reinforcing lattice element, structure having such a reinforcing lattice element, and method for producing a reinforcing lattice element
WO2020169266A1 (en) Tubular, triaxially braided fiber preform having additional, locally limited fiber layers
EP2626218A1 (en) Method for manufacturing a wheel rim from fibre composite material and wheel rim for a motor vehicle
DE102011003747A1 (en) Fiber-reinforced component for vehicle component, has plastic matrix that is reinforced with fiber structure, particularly carbon, glass or aramid fibers
DE102012207118A1 (en) Plastic component
EP3122543B1 (en) Composite fiber component and method for producing a composite fiber component
DE102010053841A1 (en) Textile semi-finished products useful for manufacturing fiber-reinforced structural-parts for motor vehicles, comprises at least one non-metallic fiber assembly, and at least one wire with a plastic deformability
DE102019204427B4 (en) Process for producing fiber-reinforced plastic components
WO2020169265A1 (en) Tubular, triaxially braided fiber preform having differently designed filler threads
EP3245049A1 (en) Inlay element for a fibre-reinforced tube
DE102018125863A1 (en) Process for producing a fiber composite cardan shaft tube and fiber composite cardan shaft tube
DE102019006010A1 (en) Fiber-reinforced structural component with a plastic matrix and process for its production
DE102015013341A1 (en) A method of producing a fiber staple yarn from reinforcing fibers incurred in the manufacture of fiber reinforced components as waste wastes or in the recycling of fiber reinforced components
EP3552807B1 (en) Fibre compound component, hybrid component and method for producing a fibre compound component
DE102023136102A1 (en) Gear element and method for producing a gear element

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20700788

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20700788

Country of ref document: EP

Kind code of ref document: A1