EDGE DESIGN OF A SURFACE STIFFENING STRUCTURE FOR A COMPONENT

DE502020012411D1Active Publication Date: 2025-12-24KAUTEX TEXTRON GMBH & CO KG
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Patent Information

Application Number
DE502020012411
Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
Priority Date
2019-11-22
Filing Date
2020-11-18
Publication Date
2025-12-24
Estimated Expiration
2040-11-18

AI Technical Summary

Technical Problem

Existing fiber-reinforced composite components in the automotive sector face stress concentration and weak points at transition areas between injection-molded and fiber-reinforced materials due to differences in stiffness, leading to inadequate mechanical bond strength and energy absorption under high loads.

Method used

A component design featuring a planar reinforcing component enclosed on both sides by a planar material with varying wall thickness, including an overlap and ramp area, ensuring higher stiffness of the reinforcing component compared to the planar material, and utilizing indentations for stabilization during manufacturing.

Benefits of technology

Enhances mechanical bond strength and energy absorption under high loads while maintaining stability and visual appeal, preventing fracture at transition zones by distributing forces effectively.

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Description

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[0001] Fiber-reinforced composites are increasingly being used in the automotive sector to reduce component weight and increase component performance. One approach for highly stressed, injection-molded components is the single-stage forming and back-injection (so-called "in-mould forming") of thermoplastic, continuous fiber-reinforced semi-finished products (so-called organosheets). A corresponding procedure is also possible with flow forming. These technologies combine the outstanding mechanical properties of continuous fiber-reinforced plastics (FRP) with the high cost-effectiveness and functionalization potential of injection molding or flow forming. Existing product applications include front-end module carriers, seat structures, door systems, vehicle underbody structures, and underride guards, as well as fuel tank and battery housing systems.

[0002] These components feature areas made of fiber-reinforced composite material and areas made of (injection-molded / extruded) material, which are joined at transition points. A characteristic of such components is that the stiffness of the injection-molded / extruded component is significantly lower than that of the fiber-reinforced composite component. Due to this change in stiffness, the transition between the two areas represents a stress concentration and thus a weak point under mechanical stress, particularly under impact or crash loads. EP1048442A1 discloses an example of a reinforced component.

[0003] The connection between injection-molded / extrusion material and fiber-reinforced composite (FRP) semi-finished products is typically achieved by overmolding or forming the semi-finished product's edge areas. Full-surface overmolding / forming is generally not practical from a lightweight construction perspective. Existing design guidelines for these transition areas, as well as for force introduction and functional elements, describe a combination of end-face and one-sided overlapping injection / forming. Here, the focus is primarily on the component's visual and tactile properties (trimming) rather than its mechanical properties. A disadvantage of this approach is that the known designs are not suitable for high mechanical bond strength and energy absorption under high loads. The invention aims to provide designs that are suitable for high mechanical bond strength and energy absorption under high loads and / or are visually appealing.

[0004] To solve this problem, a component and a method for manufacturing this component are provided, as defined in the attached claims. Detailed description

[0005] The invention relates to a component comprising a planar reinforcing component with a first stiffness and a planar material with a second stiffness, wherein the first stiffness is higher than the second stiffness, wherein the reinforcing component has a first end on a first narrow side and the material has a second end divided into two strips on a second narrow side, and the two strips of the second end enclose the first end on both sides in an enclosing area.

[0006] The two-sided encapsulation of the planar reinforcement component by the planar material gives the component the advantage that the stability of the composite between the planar reinforcement component and the material is maintained even when strong forces act upon it. In particular, the component can better withstand forces acting vertically to its surface. Such a component, which encapsulates the planar reinforcement component on both sides, is mechanically equally stable against a vertically acting force (for example, from the inside or outside, or in the case of overpressure and underpressure on opposite sides of the component), regardless of its orientation or direction, and is therefore force-direction dependent.

[0007] "Planar" in the context of the invention means that the object extends over a plane, and its vertical extent is very small compared to its horizontal extent. Planar objects have one or more narrow sides at the end of their horizontal extent, which are enclosed by the horizontally extending upper and lower surfaces. In the present invention, the narrow side of the planar material is formed by two strips that extend parallel to each other along the length of the narrow side of the planar material. Thus, the two strips can accommodate the end of the planar reinforcing component between them (e.g., seamlessly, form-fittingly, and / or material-bonded). The upper and lower surfaces of the planar reinforcing component and the planar material run in one or more planes that are parallel to each other over their entire extent or a portion thereof.The planar reinforcement components as well as the planar material can contain sections where the top or bottom surfaces are curved.

[0008] In a horizontal arrangement, the component has a) an area of ​​the planar reinforcement component, b) an enclosure area, and c) a base material area of ​​the planar material in that order.

[0009] An enclosing area according to the invention consists, in a horizontal arrangement, of i) an overlapping area, that is, the area in which the strips with the planar reinforcing component overlap in the surface, and ii) a ramp area that borders the overlapping area and in which no overlap takes place. In the ramp area, the planar material can have a wall thickness that is greater than the wall thickness of the planar material in the base material area. The ramp area is arranged between the overlapping area and the base area.

[0010] The wall thickness of the material in the overlap area is understood to be the wall thickness of a strip of the flat material. The wall thickness of the material outside the overlap area simply corresponds to the wall thickness of the flat material in that area.

[0011] The two strips of the planar material can have an asymmetrical or symmetrical structure relative to each other, with an imaginary plane through the horizontal center of the planar reinforcing component forming the mirror plane. Preferably, the structure is symmetrical. The end faces of both the first and the second strip can be equidistant from a narrow side of the planar reinforcing component. This means that the end faces of the strips are arranged exactly one above the other, or offset from each other by only a small degree of 20% to 0% or 10% to 0%.

[0012] Stiffness within the meaning of the invention is tensile stiffness, shear stiffness, flexural stiffness, and / or torsional stiffness. The fact that the first stiffness is higher than the second stiffness means that the tensile stiffness, shear stiffness, flexural stiffness, and / or torsional stiffness of the planar reinforcing component is higher than the corresponding tensile stiffness, shear stiffness, flexural stiffness, and / or torsional stiffness of the planar material. The first stiffness, expressed in particular as the tensile stiffness (modulus of elasticity), can be at least twice as high, two to 250 times higher, three to 200 times higher, or 20 to 100 times higher than the second stiffness, expressed in particular as the tensile stiffness (modulus of elasticity).

[0013] The planar material runs in an arc-like pattern across the entire enclosed area (in cross-section, i.e., perpendicular to the extent of the material's surface).

[0014] This achieves the advantage that the material is particularly thick in the overlap area, where the strongest forces occur under load. Furthermore, the arc-like profile allows the wall thickness of the material to gradually increase from the starting point of the arc on the side, towards the base of the material, to the endpoint of the arc bordering the planar reinforcement component, first reaching a maximum value and then decreasing continuously. This avoids sharply defined transitions between the planar reinforcement component and the planar material, and provides the component with additional stability, preventing it from failing under load.

[0015] "Arc-like" in the context of the invention can refer to a continuously gradual increase / decrease in the wall thickness of the material in the transition region, i.e., an actual arc shape. However, "arc-like" can also mean that a shape exists which consists of several straight sections, wherein the transitions between the several straight sections are defined by an edge and / or formed by an arc.

[0016] The material's wall thickness is at its maximum at the point where the first end forms a narrow side of the planar reinforcement component. This means that the material's surface at this point has the greatest distance to the opposite surface of the reinforcement component. The wall thickness of the material in one or both strips at this point is equal to or greater than half the base material thickness. Therefore, the total wall thickness of the material in the strips at this point can be equal to or greater than the base material thickness.The position of the wall thickness of the material, at which the first end forms a narrow side of the planar reinforcing component, is a position on the surface of the material from which a perpendicular can be dropped to the enclosed first end of the narrow side of the planar reinforcing component, i.e. the point at which the narrow side of the planar reinforcing component meets the second end of the planar material.

[0017] This results in the greatest wall thickness of the material, or rather the strip(s) that the material forms at this position, in the transition zone between the planar reinforcement component and the planar material. This position is the one where the component is most likely to fracture under load. Therefore, the material's wall thickness at this position counteracts the risk of the component fracturing.

[0018] Furthermore, the minimum wall thickness can be equal to or greater than the base material wall thickness, that is, the wall thickness of the material outside the enclosure area.

[0019] Therefore, the wall thickness of the material at this position counteracts breakage of the component in a particularly advantageous way.

[0020] The base material wall thickness can be ≥ 0.8 mm and ≤ 10 mm, ≥ 1 mm and ≤ 5 mm, ≥ 1.5 mm and ≤ 4.5 mm, ≥ 2.0 mm and ≤ 3.5 mm, ≥ 2.0 mm and ≤ 3 mm, or ≥ 2.25 mm and ≤ 2.75 mm.

[0021] The ramp area can have a length of ≥ 1.5 mm and ≤ 15 mm, ≥ 1.5 mm and ≤ 5.0 mm, ≥ 2.0 mm and ≤ 4.5 mm, ≥ 2.5 mm and ≤ 4.0 mm, or ≥ 3.00 mm and ≤ 3.50 mm. The length of the ramp area is defined as the distance between the starting point of the arc (on the side facing the base of the material) and the point where a perpendicular is dropped from the position where the wall thickness of the material in the arc is at its maximum, onto the imaginary extension of the surface of the flat material in the base.

[0022] The overlap area can have a length of ≥ 1.5 mm and ≤ 15 mm, ≥ 5.0 mm and ≤ 15.0 mm, ≥ 7.0 mm and ≤ 12.0 mm, ≥ 8.0 mm and ≤ 11.0 mm, or ≥ 9.00 mm and ≤ 10.00 mm.

[0023] The maximum wall thickness can be 0.5 to 2 times, 1 to 2 times, 1 to 1.75 times, 1 to 1.5 times, or 1 to 1.25 times the base material wall thickness.

[0024] The length of the overlap area between the reinforcement component and the material can be 0.5 to 10 times, 1.5 to 8 times, 1.7 to 6 times, or 2 to 4 times the base material wall thickness.

[0025] It has been shown that this ratio between the length of the overlap area and the material ensures particularly high stability of the component.

[0026] Indentations (i.e., recesses or cutouts) may be provided in the front face of at least one of the strips.

[0027] These indentations can be created by retainers integrated into the mold or tool used to manufacture the component. Retainers can reduce or prevent displacement or "splitting" (e.g., separation of the fabric layers in the case of an organosheet) of the reinforcing component caused by the flowing (plastic) melt and stabilize the planar reinforcing component against the melt flow or the pressed-on material, ideally keeping it centered within the wall thickness (i.e., preventing it from being pressed unevenly towards the wall's edge).

[0028] The end faces of the strips refer to the sides of the strips that face the flat reinforcing component and lie within the overlap area. Therefore, the indentations project from the end face of the strips into the strips at an angle of 80° to 100°, preferably 90°.

[0029] Indentations can be provided in both strips.

[0030] This offers the advantage that during the manufacturing process, the planar reinforcing component is largely stabilized symmetrically relative to the melt flow or the pressed-on material.

[0031] The indentations of the first rib can be arranged opposite the indentations of the second rib.

[0032] Thus, the respective indentations in the two strips lie directly above one another.

[0033] This offers the advantage that during the manufacturing process, a very symmetrical stabilization of the planar reinforcement component occurs relative to the melt flow or the pressed-on material.

[0034] The indentations can have two different lengths, and the indentations with two different lengths can be arranged alternately.

[0035] In particular, one of the ridges can contain a first group of indentations of one length and a second group of indentations of a second length, where the first length is greater than the second length.

[0036] Both the first and the second ridge can contain this first group and this second group of indentations.

[0037] The indentations of the second group of indentations in the first rib can be opposite the indentations of the first group in the second rib; and the indentations of the first group of indentations in the first rib can be opposite the indentations of the second group in the second rib. This results in an alternating length of the indentations both within and between ribs.

[0038] This arrangement has the advantage that the finished component is particularly leak-proof when used, for example, in a fluid container. Furthermore, a visible weld line is avoided.

[0039] Alternatively, the indentations of the second group of indentations in the first bar can be opposite the indentations of the second group in the second bar; and the indentations of the first group of indentations in the first bar can be opposite the indentations of the first group in the second bar. This means that the length of the indentations alternates only within each bar.

[0040] This can have the advantage of achieving improved sealing against fluid, but the manufacturing process is relatively simple due to the simpler shape required to produce this embodiment.

[0041] The indentations can have a length of 100% to 25% of the length of the overlap area. Preferably, the indentations can be provided with a length of 95% to 70% of the length of the overlap area, and / or indentations can be provided with a length of 25% to 50% of the length of the overlap area (in particular, these different lengths can be combined if two groups of indentations with different lengths are provided).

[0042] Furthermore, the indentations within one or both strips can be approximately equidistant from each other (approximately meaning up to 25% deviation of the distance between all indentations from a mean distance). In particular, the distances between the indentations in both strips can be approximately the same. However, it is also disclosed that, depending on the design specifications, the distances between the indentations within one or both strips can be freely adjusted, or are variable, at least in a partial area of ​​the respective strip (for example, up to 30%).

[0043] The equidistance further improves pressure distribution under load.

[0044] The reinforcing component can be a plastic, a fiber composite of a thermoplastic or thermosetting nature, in particular (a plate made of) fiber composite plastic, a metal plate or a wooden plate.

[0045] Fiber-reinforced plastics consist of a matrix and reinforcing fibers.

[0046] The matrix can be a thermoplastic matrix (polyetheretherketone, PEEK; polyphenylene sulfide, PPS; polysulfone, PSU; polyetherimide, PEI; polytetrafluoroethene, PTFE; polyamide, e.g., PA6, PA66, PA612, or polyphthalamides, PPA; polyolefin, e.g., polyethylene, PE, or polypropylene, PP; and / or polycarbonate, PC), or a thermosetting matrix (epoxy resin, EP, e.g., 2%; unsaturated polyester resin, UP, e.g., 8%; vinyl ester resin, VE; phenol-formaldehyde resin, PF, e.g., 38%; diallyl phthalate resin, DAP; methacrylate resin, MMA; polyurethane, PUR; and / or amino resins).

[0047] Reinforcing fibers can be inorganic non-metallic reinforcing fibers (basalt fibers, boron fibers, glass fibers, ceramic fibers, silica fibers, carbon fibers, and / or quartz fibers), organic reinforcing fibers (aramid fibers, PBO fibers, polyester fibers, nylon fibers, polyethylene fibers, and / or polymethyl methacrylate fibers), and / or metallic reinforcing fibers (steel fibers).

[0048] The reinforcing fibers can be short fibers (0.1 to 1 mm), long fibers (1 to 50 mm), or continuous fibers (> 50 mm). The latter are preferred due to the very high stiffness they provide. The reinforcing fibers can be woven or laid in a single layer. They can also be arranged in multiple layers.

[0049] The reinforcing component can be made of a plastic compatible with the plastic of the sheet material, resulting in a metallurgical bond between the reinforcing component and the sheet material. Alternatively, the reinforcing component can be made of a material compatible with the plastic of the sheet material, but coated with a plastic at least at the points of contact with the sheet material, or entirely, again resulting in a metallurgical bond between the reinforcing component and the sheet material (in this case, the stiffness of the coated reinforcing component corresponds to the stiffness of the uncoated reinforcing component). Additionally, a positive fit can also occur.

[0050] Furthermore, the reinforcing component may consist of a material that is incompatible with the plastic of the flat material, so that a form-fitting connection between the reinforcing component and the flat material may result.

[0051] The (sheet-like) material can be an injection molding material, in particular a thermoplastic injection molding material. Thermoplastic injection molding materials can be polyolefin (polypropylene, PP, polyethylene, PE), Plexiglas, PMMA, polycarbonate, PC, polystyrene, PS, and its copolymers (e.g., ABS = acrylonitrile butadiene styrene), polyamide, PA, or polyoxymethylene.

[0052] The material can be a thermoplastic or thermoset extrusion material. The thermoplastic extrusion material can be a long fiber thermoplastic (LFT with glass fiber or carbon fiber), direct long fiber thermoplastic (D-LFT), glass mat thermoplastic (GMT), or carbon fiber reinforced polymer (CFRP). The thermoset extrusion material can be a sheet molding compound (SMC with glass fiber or carbon fiber), direct sheet molding compound (D-SMC), or bulk molding compound (BMC).

[0053] The choice of material and reinforcement component depends on the intended application, and a specialist can select materials and reinforcement components accordingly. The only essential requirement is that the stiffness of the reinforcement component is higher than the stiffness of the material.

[0054] The strips of the sheet material can completely enclose an edge that encompasses the entirety of the first narrow side of the reinforcement component. Alternatively, the sheet material can only partially enclose this edge, for example, only one end face of the reinforcement component, leaving areas of the edge / narrow side of the reinforcement component free.

[0055] Thus, the entire surrounding edge of the reinforcement component is stabilized by the flat material.

[0056] Furthermore, the invention relates to a front-end module carrier, a seat structure, a door system, vehicle underbody structure, underride protection, fuel tank housing, flat (structural) components for battery systems or batteries (e.g. cell module end plates) or battery housing comprising the component described above.

[0057] Front-end module carriers, seat structures, door systems, vehicle underbody structures, underride guards, fuel tank housings, and battery housings, in particular, can be subjected to high mechanical loads, especially during impacts or crashes. Therefore, the components described here are particularly suitable for designing these components.

[0058] The invention also relates to a method for manufacturing the component described above, comprising: a. Providing the reinforcement component in a mold consisting of at least two parts; b. Introducing the material into the mold; c. Forming the component by injection molding or compression molding in the mold; d. Removing the resulting component.

[0059] Here, a mold is understood to be any suitable shape or tool that can accommodate the planar reinforcing component and, in its closed state, provides cavities around the reinforcing component into which material can be injected through channels (injection molding) or into which material can be supplied for compression (extrusion). In injection molding, the component can be removed after the material has reached its solidification point (3). The cavities are designed in such a way that they can impart the shape defined by the component described above. Brief description of the characters

[0060] Figure 1 Illustrates the component according to the invention in a cross-sectional view. Figure 2 illustrates the component according to the invention in a top view. Figure 3 Figure 1 illustrates the planar material of the component according to the invention in a perspective view in which indentations are visible. Example

[0061] In the following description, identical reference numerals denote identical components, so that a description of a component given in relation to one figure also applies to the other figures, thus avoiding repetitive descriptions. Furthermore, individual features described in connection with one embodiment can also be used separately in other embodiments.

[0062] Figure 1 Figure 1 illustrates the component 1 according to the invention in a cross-sectional view.

[0063] Component 1 comprises a reinforcing component 2, which is planar and exhibits high stiffness. Suitable materials include thermoplastic or thermoset fiber composites, as well as metal plates and other types of plates.

[0064] The reinforcement component 2 has 4 at a first end (in Figure 1(shown on the right) a narrow side 5a, which is bounded by a top 5b and a bottom 5c. The opposite end of the reinforcement component is not shown in the image.

[0065] This reinforcing component 2 is overmolded on both sides with a less rigid (injection-molded) material 3 within an enclosing region U of length u. This material 3 is also largely planar. Due to the overmolding on both sides, the material 3 forms a second end 6 (in Figure 1 On the left side of material 3, two strips 8, 9 made of material 3 are located, which lie against the reinforcing component 2 in an overlap area L (directly, i.e., without forming a cavity). The opposite end of material 3 is not shown in the image. A representation of material 3 with the two strips 8, 9 without the reinforcing component 2 can be found in Figure 3 It is in Figures 2 and 3It is evident that the two strips are located one above the other on the narrow side of the material 3, and extend approximately the same distance over the reinforcing component 2.

[0066] The enclosure area U comprises the area in which the material 3 initially thickens in a ramp area R relative to a base material area A and from this starting point, but does not yet overlap with the reinforcement plate, and an overlap area L in which the material 3 overlaps with the reinforcement plate.

[0067] The planar material 3 extends over the entire enclosure area U (in cross-section, i.e., perpendicular to the extent of the surface of material 3) in an arc-like manner, as shown in Figure 1 depicted.

[0068] "Arc-like" within the meaning of the invention can denote a continuously steady increase / decrease in the wall thickness of the material 3 in the enclosing region U, i.e., an actual arc shape. However, "arc-like" can also mean that a shape exists which consists of several straight sections, wherein the transitions between the several straight sections are angular and / or formed by an arc, as is the case in Figure 1 is shown.

[0069] In particular, the greatest wall thickness h1, h2 of material 3 or of strips 8, 9 is in the region above the interface between the reinforcing component 2 and material 3. Therefore, the wall thickness h1, h2 of material 3 is at its maximum at the position where the first end 4 forms a narrow side 5a of the planar reinforcing component 2. At this position, where the first end 4 forms a narrow side 5a of the planar reinforcing component 2, the surface (top 7b or bottom 7c) of material 3 has the greatest distance to the opposite surface (top 5b or bottom 5c) of the reinforcing component 2.

[0070] This results in the greatest wall thickness h1, h2 of material 3, or of the strips 8, 9, that material 3 forms at this position, in the transition area between the planar reinforcement component 2 and the planar material 3 ("maximum wall thickness"). This position is the one where component 1 is most likely to fracture under load. Therefore, the wall thickness of material 3 at this position effectively counteracts the risk of component 1 fracture.

[0071] Furthermore, this maximum wall thickness h 1 , h 2 is equal to or greater than the base material wall thickness ½ a, that is, the wall thickness of the material 3 outside the enclosure area U.

[0072] Therefore, the wall thickness h1, h2 of material 3 at this position particularly effectively counteracts fracture of component 1. Furthermore, this ensures that the wall thickness in the transition zone, i.e., the area where the narrow side 5a of the reinforcing component meets the planar material 3, is at least equal to the wall thickness ½a in the base material area A, and therefore the strength in this area is approximately the same as that found in the rest of component 1.

[0073] The length of the overlap area L is, for example, 2 to 4 times the base material wall thickness a.

[0074] It has been shown that this ratio between the length of the overlap area L and material 3 ensures a particularly high stability of the component 1, while at the same time avoiding excessive use of material 3.

[0075] Figure 2illustrates the component 1 according to the invention in a top view and Figure 3 shows a perspective detail view of material 3 from Figure 2 .

[0076] As from Figures 2 and 3 Indentations 12, 13 (i.e. recesses, notches) can be provided on the front face 11 of the strips 8, 9 from the overlap area.

[0077] These indentations 12, 13 can be produced by retainers provided in the mold or tool used to manufacture component 1. Retainers can reduce or prevent displacement or "splicing" (e.g., loosening of the bond between the fabric layers in the case of an organosheet) of the reinforcing component 2 caused by the flowing (plastic) melt and stabilize the planar reinforcing component 2 against the melt flow, ideally keeping it centered on the wall thickness of the material (i.e., preventing it from being pressed unevenly towards the edge of the wall).

[0078] In the Figure 3 Indentations 12 and 13 are provided in both strips 8 and 9.

[0079] This offers the advantage that during the manufacturing process, a largely symmetrical stabilization of the planar reinforcing component 2 takes place relative to the melt flow.

[0080] As in Figure 3 As shown by way of example, the indentations 12, 13 of the first bar 8 can be arranged opposite the indentations of the second bar 9.

[0081] Thus, in the two strips 8, 9, the respective indentations 12, 13 lie directly above each other.

[0082] This offers the advantage that during the manufacturing process a very symmetrical stabilization of the planar reinforcing component 2 takes place relative to the melt flow or the pressed material.

[0083] As in Figures 2 and 3 As shown, the indentations 12, 13 can have two different lengths and can be arranged alternately. In this case, an indentation 13 with a longer length can be located in the upper rib 8, as with the indentations on the left and right in Figure 3are arranged opposite a short indentation 12 in the underlying rib 9. Similarly, a short indentation 12 in the upper rib 8, as in the case of the indentation 12 located centrally in Figure 3 is arranged so that a recess 13 with a long length is opposite in the underlying rib 9.

[0084] This arrangement has the advantage that the finished component 1 is particularly densely sealed against the fluid when used, for example, in a fluid container. Furthermore, a visible weld line is avoided.

[0085] As in Figure 2 As shown, the material 3 can completely enclose the narrow side 5a of a planar reinforcement component 2. However, it is also conceivable that the material 3 is only attached to one or more partial areas of the planar reinforcement component 2. Reference symbol list

[0086] 1: Component 2: (Shear) reinforcement component 3: (Shear) material 4: First end of the shear reinforcement component 5a: Narrow side of the shear reinforcement component 5b: Top side of the shear reinforcement component 5c: Bottom side of the shear reinforcement component 6: Second end of the shear material 7a: Narrow side of the shear material 7b: Top side of the shear material 7c: Bottom side of the shear material 8: First rib 9: Second rib 10: Position of the maximum wall thickness of the material 11: End face of the overlap area 12: Short indentation 13: Long indentation U, u: Enclosure area, length of the enclosure area R, r: Ramp area A, a: Base material area, base material thickness L, l: Overlap area, length of the overlap area h1: Wall thickness of the first rib h 2: Wall thickness of the second strip

Claims

1. A component (1) having a flat reinforcing element (2) of a first stiffness and a flat material (3) of a second stiffness, the first stiffness being higher than the second stiffness, the reinforcing element (2) having a first end (4) on a first narrow side (5a) and the material (3) on a second narrow side (7a) having a second end (6) that bifurcates into two strips (8, 9), and the two strips (8, 9) of the second end (6) enclosing the first end (4) on both sides in a zone of enclosure (U), characterized in that the maximum wall thickness (h1, h2) is equal to or greater than half the base material wall thickness, i.e., the wall thickness (a) of the material (3) outside the zone of enclosure (U), wherein the material (3) runs in an arc over the entire zone of enclosure (U), and wherein the wall thickness (h1, h2) of the material (3) is at a maximum at the position at which the first narrow side (4) of the flat reinforcing element (2) meets the second end (6) of the flat material (3).

2. The component (1) according to any of the preceding claims, characterized in that the length of the zone of overlap (L) between the reinforcing element (2) and the material (3) is 1.5 to 8 times, 1.7 to 6 times, or 2 to 4 times the base material wall thickness (a).

3. The component (1) according to any of the preceding claims, characterized in that indentations (12, 13) are provided in at least one of the strips (8, 9) on the end face.

4. The component (1) according to claim 3, characterized in that indentations (12, 13) are provided in both strips (8, 9).

5. The component (1) according to claim 4, characterized in that the indentations (12, 13) of the first strip (8) are arranged offset relative to the indentations (12, 13) of the second strip (12, 13); or that the indentations (12, 13) of the first strip (8) are arranged opposite the indentations (12, 13) of the second strip (9).

6. The component (1) according to any of claims 3-5, characterized in that the length of the indentations (12, 13) is the same for all indentations (12, 13).

7. The component (1) according to any of claims 3-6, characterized in that, in one of the strips (8, 9), there is a first group of indentations (13) having a first length and a second group of indentations (12) having a second length, and the first length is greater than the second length.

8. The component (1) according to claim 7, characterized in that the first group and the second group of indentations (12, 13) are present both in the first and in the second strip (8, 9).

9. The component (1) according to claim 7 or 8, characterized in that the indentations of the second group of indentations (12) in the first strip (8) are opposite the indentations of the first group (13) in the second strip (9), and in that the indentations of the first group of indentations (13) in the first strip (8) are opposite the indentations of the second group (12) in the second strip (9).

10. The component (1) according to any of claims 7-9, characterized in that the indentations of the second group of indentations (12) in the first strip (8) are opposite the indentations of the second group (12) in the second strip (9), and in that the indentations of the first group of indentations (13) in the first strip (8) are opposite the indentations of the first group (13) in the second strip (9).

11. The component (1) according to any of the preceding claims, characterized in that the reinforcing element (2) is a plastic, a fiber composite of a thermoplastic or duroplastic type, a metal plate or a wooden panel; or / and that the material (3) is an injection molding material, in particular an injection molding material of a thermoplastic type, or an extrusion molding material, in particular an extrusion molding material of a thermoplastic or duroplastic type; and / or the strips (8, 9) of the flat material (3) completely enclose an edge that contains the entirety of the first narrow side of the reinforcing element or enclose only a partial region of the edge.

12. A front-end module carrier, seat structure, door system, fuel tank housing, vehicle underbody structure, underrun protection, structural components for battery systems or battery housings comprising a component (1) according to any of the preceding claims.

13. A method for producing a component (1) according to any of the preceding claims, comprising: a. providing the reinforcing element (2) in an at least two-part mold; b. introducing the material (3) into the mold; c. forming the component by means of injection molding or extrusion in the mold; d. removing the component (1) obtained from the opened mold.