DE102015014361A1 - Method for producing a node structure with at least one hollow profile component, and node structure and vehicle body - Google Patents

Method for producing a node structure with at least one hollow profile component, and node structure and vehicle body

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Publication number
DE102015014361A1
DE102015014361A1 DE102015014361.1A DE102015014361A DE102015014361A1 DE 102015014361 A1 DE102015014361 A1 DE 102015014361A1 DE 102015014361 A DE102015014361 A DE 102015014361A DE 102015014361 A1 DE102015014361 A1 DE 102015014361A1
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Germany
Prior art keywords
profile
node
components
plastic
fiber
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Pending
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DE102015014361.1A
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German (de)
Inventor
Florian Eidmann
Oliver Stoll
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Audi AG
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Audi AG
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Publication date
Application filed by Audi AG filed Critical Audi AG
Priority to DE102015014361.1A priority Critical patent/DE102015014361A1/en
Publication of DE102015014361A1 publication Critical patent/DE102015014361A1/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/84Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks by moulding material on preformed parts to be joined
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C39/00Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/02Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C39/10Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/30Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3055Cars

Abstract

The invention relates to a method for producing a node structure with at least two profile components (120, 130) which are to be firmly connected to each other at node-side profile ends (121, 131) in a connection node, comprising: - providing the prefabricated profile components (120, 130), wherein at least one of the profile components (120, 130) is a hollow profile component; - Closing of the open profile end (121, 131) on the hollow profile component (120, 130) by a closure element (125, 135); - Positioning the profile ends (121, 131) in a pressing tool (200); - Performing a pressing operation with the addition of fiber-containing plastic material (K) for generating the profile ends (121, 131) connecting connecting node, wherein the closure element (125, 135) prevents penetration of the fibrous plastic mass (K) in the hollow profile component (120, 130) , The invention further relates to a knot structure producible by this method and to a vehicle body having at least one such knot structure.

Description

  • The invention relates to a method for producing a node structure with at least two profile components, wherein at least one of these profile components is a hollow profile component, and with a connection node connecting these profile components. The invention further relates to a node structure and a vehicle body.
  • Body structures for motor vehicles, in particular passenger cars, are known from the prior art, which are formed from individual prefabricated profile components, wherein the profile components are joined or interconnected at so-called nodes by means of connection nodes. The prior art is, for example, on the patents DE 102 56 608 A1 . DE 10 2014 209 991 A1 and DE 10 2007 027 593 A1 pointed. Furthermore, profile components formed from fiber-reinforced plastic composite are used for such body structures, which can sometimes achieve significant weight savings. For related art is, for example. On the patents DE 44 23 642 C1 . DE 10 2013 226 607 A1 and DE 10 2013 220 209 A1 pointed.
  • The invention has for its object to provide an improved method for producing a node structure of the type mentioned.
  • This object is achieved by a method according to the invention having the features of patent claim 1. With a sibling claim, the invention also extends to a knot structure that can be produced by the method according to the invention.
  • With a further independent claim, the invention also extends to a vehicle body, in particular for a passenger car, with a frame formed from profile components (space frame frame) or frame portion (eg., Front, middle or rear structure), at least one inventive and / or having a knot structure produced by a method according to the invention. Preferably, the frame or frame portion only hollow profiles and in particular formed only of fiber-reinforced plastic composite hollow profiles.
  • Further developments and embodiments of the invention will become apparent for all subject matter of the dependent claims, the following description and the figures.
  • The inventive method for producing a node structure with at least two profile components, which are to be firmly connected to one another at node-side profile ends in a connection node, comprises at least the following steps:
    • - Providing the prefabricated profile components, wherein at least one of these profile components is a hollow profile component;
    • - Closing of the open node-side profile end on the hollow profile component (or on all hollow profile components) by a closure element;
    • - Positioning the profile ends to be joined together in a connecting node generating the pressing tool;
    • - Performing a pressing operation with the addition of fiber-containing plastic compound for producing a connecting the profile ends connecting node, wherein the closure element at the closed profile end (or the closure elements at all closed profile ends) during the pressing process penetration of the fibrous plastic material in the hollow profile component (or in the hollow profile components ) prevented.
  • All profile components to be connected in a connection node to be generated are preferably hollow profile components. The profile components to be joined and / or hollow profile components can, at least at their. to be connected to the profile ends or at their node-side end portions, be formed with different cross-sections or cross-sectional dimensions and / or with different wall thicknesses or wall thicknesses.
  • A profiled component is understood in particular to mean an elongate, rod-like component with a defined cross-sectional shape (profile), which can have a straight or even curved or curved axial profile. The cross-sectional shape or the profile can change over the axial course. A hollow profile component is understood to be a tubular profile component with a closed cross section (hollow profile) and with at least one profile chamber.
  • The profile components to be joined together can be formed from any suitable material or material. Preferably, at least one of the profile components, in particular at least the hollow profile component, made of fiber-reinforced plastic composite (FKV) or a fiber-reinforced plastic composite material (which is hereinafter a consolidated and cured fiber reinforced plastic composite material is meant). All profile components made of fiber-reinforced plastic composite material, in particular also of different fiber-reinforced plastic composite materials, are particularly preferably formed. The fibers may be carbon fibers, glass fibers and / or other fibers. Preference is given to long fibers which, for example, also in a layer structure, are arranged according to the load path. The plastic material (matrix) may be a thermoset or thermoplastic material. The hollow profile components formed from fiber plastic composite material may have a wall thickness of 0.6 mm to 10 mm, preferably from 2 mm to 8 mm and in particular from 3 mm to 7 mm. Between the plastic compound producing the connection node and the profile end of a profile component formed from fiber-reinforced plastic composite material, in addition to the positive connection, a cohesive connection can also occur. By suitable material coordination a material connection can be favored.
  • The profile components are prefabricated components which are produced in a preceding manufacturing process, if appropriate also by a supplier, for example in the pultrusion process. The provision of these components includes z. As the finishing, the dressing, cleaning and / or checking the profile components to be joined. The profile components are preferably made of prefabricated profile semi-finished products, which may, for example, be bar stock.
  • After the open node-side profile ends are closed at all hollow profile components, these are inserted by means of the connection node to be connected profile ends in an open pressing tool. The pressing tool preferably comprises two divisible tool parts which are formed with a mold cavity that predetermines the connecting node. The pressing tool is, for example, installed in a press or closing device. The pressing tool can be both a stationary and a mobile tool.
  • After closing the pressing tool, a pressing process is carried out with the addition of a fibrous plastic mass, in which the connection node is generated. The plastic compound may be a thermosetting plastic or a thermoplastic. The fibers are preferably short fibers (for example carbon fibers, glass fibers, synthetic fibers, mineral fibers, metal fibers, mixed fibers, recycled fibers or the like) with a length of, for example, 1 mm to 100 mm, preferably 2 mm to 50 mm and in particular of 3 mm to 25 mm. The fibers may also have different fiber lengths, so that it may be assumed that an average fiber length is used. Preferably, the fiber-containing plastic material used to produce the connection node is matched to the fiber-plastic composite material of the profile components to be joined.
  • After curing, the pressing tool can be opened and the knot structure produced can be removed. This node structure comprises at least two profile components and a connecting node formed from fiber-reinforced plastic, which connects the profile components at node-side profile ends form-fitting and optionally also materially, wherein at least one of the profile components is a hollow profile component whose connected in the connection node profile end is closed by a closure element. The node structure is therefore an assembly part (ZSB part). Preferably, all profile components of this node structure are hollow profile components, which are formed in particular from fiber-reinforced plastic composite material.
  • The closure element at the open end of a hollow profile component prevents the uncontrolled penetration of the fibrous plastic compound into the interior of the hollow profile component or in its profile chamber when the connection node is generated. Thus, the fiber-containing plastic mass needed to produce the connection node can be determined exactly. Furthermore, an optimal molding pressure can be generated during the pressing process in the pressing tool, which promotes both the shaping of the connection node and the curing of the plastic compound. Furthermore, the formation of trapped air is prevented. The closure element also has advantageous influence on the strength of the node structure produced, in particular in a crash load.
  • With the invention, a lightweight, extremely stable or highly resilient and also relatively easy to recycle node structure is provided, which is particularly suitable for vehicle body construction. The method according to the invention enables the simple and cost-effective production, in particular series production, of this node structure. With the method according to the invention, a connection node can be generated virtually in one operation, in particular with a short cycle or cycle time, and at the same time the assembly component constituting the node structure can also be formed (One Step Technology).
  • The closure element for closing the open profile end on the hollow profile component may be a lid to be placed on or the like. The lid can z. B. from a metal material (eg. Sheet metal) or from a fiber-reinforced plastic composite material, in particular from a pre-impregnated prepreg material may be formed.
  • Preferably, the closure element for closing the open profile end on the hollow profile component of a plastic foam material educated. The plastic foam material is, in particular, a heat-resistant and pressure-resistant, preferably closed-cell, rigid foam or rigid foam, for example based on PMI (polymethacrylimide) or on PU (polyurethane). The plastic foam may have, for example, a density of 50 kg / m 3 , in particular from 100 kg / m 3 , to 200 kg / m 3 . The closure element formed from plastic foam material can be produced, for example, from a prefabricated foam material (in particular a foam semi-finished product, such as, for example, a foam board or the like) and glued in the open profile end in the form of a graft or plug. Another possibility is to foam out and thereby graft-seal the open profile end.
  • The closure depth of the graft or plug-like closure element (meaning the insertion, sticking or foaming depth) may be 10 mm to 100 mm, preferably 20 mm to 80 mm, particularly preferably 40 mm to 60 mm and in particular approximately 50 mm , The closure depth to be selected results in particular from stiffness and / or strength requirements for the production method (the design takes place, for example, with regard to the cavity pressure) and / or for the node structure to be produced. A formed from plastic foam material closure element allows for a very low weight a good, barrier-like closure of the open profile end. Furthermore, with the plastic foam plug during the pressing process in the pressing tool, especially for smaller wall thicknesses, a support effect can be achieved, this support effect is effective even at later load, especially in crash loading (buckling and crushing protection).
  • The fiber-containing plastic material for generating the connection node can be introduced into the mold cavity before closing the pressing tool. This can, for example, by using in the DE 10 2005 061 474 B4 done spray device described. After the pressing tool has been closed, the in particular precisely portioned plastic mass is distributed in the tool cavity and reshapes the profile ends to be connected, resulting in a positive and, if necessary, integral connection. A thermosetting plastic material (resin) can be cured by supplying heat (by means of tool heating). A thermoplastic plastic material can be cured by heat removal (by means of tool cooling). The fibrous plastic mass may also be SMC (typical fiber lengths are, for example, 25 mm to 50 mm) or BMC (typically smaller fiber lengths than SMC).
  • The fiber-containing plastic material for generating the connection node can also be introduced after closing the pressing tool by injection into the mold cavity. This process is similar to injection molding or RTM technology. The cavity filling can not only be quantity-controlled, but also pressure-controlled. By a special arrangement of the injection nozzles, in principle, at least regionally, an approximate fiber orientation of the injected with the plastic mass reinforcing fibers, in particular short fibers can be achieved.
  • The node-side profile ends of the profile components to be joined together can be formed with corresponding abutment surfaces, which in particular allow a nested arrangement of these profile ends. Corresponding abutment surfaces, in particular in the connection node, are understood to mean facing or opposing surface sections which, for example, also serve as force transmission surfaces in the event of loading. The corresponding abutment surfaces can be designed, for example, as straight oblique surfaces, as concave and convex surfaces (or at least with concave or convex surface portions), as corrugated surfaces, as stepped surfaces and / or as nestable surfaces.
  • The profile ends in question can be prepared, for example, before being positioned in the pressing tool by mechanical processing, in particular by cutting and / or milling, in order to produce such specially shaped abutment surfaces or joining surfaces. This process can also be called contouring. In the case of a hollow profile component, the contouring takes place, in particular, only after the closure of the open profile end with a plastic foam material.
  • The node-side profile ends are positioned in the pressing tool in particular such that there is (at least) a substantially homogeneous spacing gap between these abutment surfaces. The pressing tool is designed accordingly. During the pressing process, the fiber-containing and in particular short fibers containing plastic mass can also penetrate into the spacing gap and fill it. As a result, an improved positive locking is achieved.
  • The spacing gaps have a preferred gap of at least 0.5 mm and at most 2 mm. The minimum gap ensures that the profile ends positioned in the pressing tool can be optimally shaped by the fiber-containing plastic compound and thereby formably and optionally also firmly bonded. The maximum (highest possible) gap ensures that in the connection node generated the force flow paths between the connected Profile ends or their abutment surfaces are short and not too long.
  • The outer contours generated by the contouring at the profile ends to be joined together in the connection node are in particular designed so that these profile ends, especially in compliance with the o. G. Gaps, with the largest possible impact surfaces and can be positioned as close to each other as possible. In this case, more than two profile ends, sometimes even up to five profile ends and more, can be brought together as constructively as possible later load load paths in the connection node as closely as possible and thus space-saving.
  • Analogously to the preceding explanations, the method according to the invention for producing a node structure preferably has the following steps, carried out in this order, which can also be automated:
    • - Providing the prefabricated profile components, with at least one hollow profile component (in particular, it is in all profile components to formed from fiber-reinforced plastic composite hollow profile components);
    • - Closing of the open profile end on the hollow profile component by gluing a sealing plug made of plastic foam material;
    • - Generating corresponding abutment surfaces by machining the profile ends;
    • - Positioning the profile ends to be joined together in the pressing tool, such that there is a homogeneous spacing gap between the abutting surfaces;
    • - Performing the pressing process, wherein fiber-containing plastic material fills the spacing gap (or the -column) and the closure element or the closure plug prevents the penetration of the fibrous plastic material in the at least one hollow profile component;
    • - curing, opening the pressing tool and removing the node structure.
  • The invention will be explained in more detail by way of example and not by way of limitation with reference to the schematic figures. The features shown in the figures and / or explained below, even independently of certain combinations of features, further develop the invention.
  • 1 shows a perspective view of a frame section formed by a hollow profile components of a motor vehicle body.
  • 2 shows in a perspective view of the frame portion of 1 belonging node structure.
  • 3 shows in perspective views the closing of the open end of a hollow profile component.
  • 4 shows in several sectional views possible embodiments of abutment surfaces to be joined hollow profile components.
  • 5 illustrates in several sectional views the creation of a connection node in the manufacture of a node structure.
  • At the in 1 shown frame section is a rear structure 100 which is part of a frame of a vehicle body. The rear structure 100 comprises a plurality of hollow-fiber composite components formed from fiber-reinforced plastic composite material and prefabricated separately from one another 120 . 120a . 130 . 130a . 140 . 140a and 150 that have connection nodes 160 and 160a are firmly connected. The hollow profile components 120 . 120a . 130 . 130a . 140 . 140a and 150 For example, they are produced by means of pultrusion (fiber-plastic composite pultrusion profiles), braiding or winding. The hollow profile components 120 . 120a . 130 . 130a . 140 . 140a and 150 can be formed differently depending on the load and therefore have different cross-sections and / or wall thicknesses and / or be formed from different fiber-reinforced plastic composite materials. Furthermore, individual of these hollow profile components may have curved profiles and / or cross sections that vary over the longitudinal extension.
  • The rear structure 100 can also have open profile components (eg U-profiles) and / or solid profile components, as well as profile components, which are formed from other materials (eg., Metal), wherein also such profile components via the connection node 160 respectively. 160a in the frame structure 100 can be involved. The rear structure 100 Despite its low weight, it has excellent strength, rigidity and crash stability.
  • The in a connection node 160 respectively. 160a connected hollow profile components together with this connection node form a node structure in the context of the invention. 2 shows such a node structure 110 for the frame area lying on the left in the direction of travel x. The integral node structure 110 includes several hollow profile components 120 . 130 . 140 and 150 at profile ends in a connection node 160 are firmly connected.
  • Based on 3 . 4 and 5 below is the production of such a node structure 110 without limitation and for the sole purpose of simplifying Presentation and description essentially only on the connection of the two hollow profile components 120 and 130 will be received. The hollow profile components 120 and 130 can, in contrast to the illustrated, at least at their profile ends to be connected or at their node-side end portions 121 and 131 be formed with different cross-sections or cross-sectional dimensions and / or with different wall thicknesses or wall thicknesses, which is a significant advantage of the invention.
  • 3a shows the open profile end 121 of the hollow profile component 120 , with a front side produced by a straight cut. In the hollow profile component 120 For example, it is a simple rectangular profile, in principle, other profile cross-sections are possible. The profiled end shown 121 of the hollow profile component 120 is first by a closure element formed of plastic foam material 125 locked. The plug or graft-like closure element 125 can with a to the inner contour of the hollow profile component 120 corresponding outer contour produced by milling a prefabricated foam material and after the application of an adhesive 126 (For example, on resin-based) are glued into the open profile end or in the profile chamber. A closed-cell foam structure of the closure element 125 simplifies the wetting of the surface with adhesive 126 , Alternatively, the closure element 125 by foaming the profile end 121 can be produced, wherein advantageously undercuts can be back-foamed (see 4c , Closure element 135 ). The closure depth T is, for example, 50 mm.
  • 3b shows this with the help of the closure element 125 closed profile end 121 of the hollow profile component 120 , The closure element formed from a plastic foam material 125 is glued flush. The closure element 125 However, it can also be set back inwards or inserted (stuck on) or glued. Also the profile ends of the others in the connection node 160 To be connected hollow profile components are provided in a corresponding manner with a closure element (see reference numeral 135 respectively. 145 in 4 ).
  • Subsequently, the closed profile ends are prepared by cutting and / or cutting machining, in particular by mechanical processing such as. Cutting and / or milling, with corresponding joint or joining surfaces, in particular complexly shaped abutment surfaces are generated, which overlap or overlapping or even nested arrangement of these profile ends in the connection node to be produced 160 enable. 4a shows a simple embodiment of the profile ends to be joined together 121 and 131 the hollow profile components 120 and 130 with oblique bump or connecting surfaces 122 and 132 , 4b shows a slightly more complex configuration of these abutment surfaces, the nested arrangement of the profile ends 121 and 131 allows. 4c shows an embodiment with complex shaped abutment surfaces for in the connection node 160 to be connected profile ends 121 . 131 and 141 , 4c further shows that the abutment surfaces are also formed with regard to uniform or homogeneous gap dimensions to be provided spacing gaps S.
  • To produce. of the connection node 160 become the closed profile ends formed with corresponding abutment surfaces 121 and 131 the hollow profile components 120 and 130 in a connection node 160 generating pressing tool 200 inserted as in 5a shown. With a corresponding embodiment of the multipart and in particular two-part pressing tool 200 are also other connection angle than the 180 ° connection angle shown possible. The abutting surfaces of the profile ends to be joined 121 and 131 are spaced with a uniform spacing gap S, which is achieved by a corresponding configuration of the pressing tool 200 can be guaranteed. The gap is, for example, 0.5 mm to 2.0 mm.
  • In the tool cavity 230 of the lower tool part 210 there is already one before inserting and positioning the profile ends 121 and 131 introduced short fiber-containing plastic mass K. The plastic mass K is preferably a thermoset plastic compound (resin). After positioning the profile ends to be connected 121 and 131 is applied or sprayed on the connection area more kurzfaserhaltige plastic mass K, for example. With the aid of the spray device shown 300 ,
  • Subsequently, the pressing tool 200 by lowering the upper part of the tool 220 closed, as in 5b shown, and a pressing process (typically a so-called hot pressing) carried out. In this pressing process, the defined amount of fibrous plastic mass K distributed in the cavity 230 , being in the cavity 230 arranged profile ends 121 and 131 the hollow profile components 120 and 130 be formed positively and thereby the spacing gap S is filled. Furthermore, a cohesive connection can also be established between the connection node 160 forming plastic mass K and the profile ends 121 and 131 the hollow profile components 120 and 130 form. The shape of the connection node 160 results from the negative mold of the mold cavity 230 ,
  • During the pressing process (hot pressing), the closure elements formed from a pressure and temperature-resistant plastic foam material act 125 and 135 as barriers and prevent the penetration of the fibrous plastic mass K into the profile chambers of the hollow profile components 120 and 130 , This can also be a high defined molding pressure in the mold cavity 230 form. The closure elements 125 and 135 can be pasted back in place (as described above and in 5b illustrated with dashed lines), so that form-fitting with the fibrous plastic mass K can form in the end-side pockets formed thereby.
  • When creating the connection node 160 only the profile ends to be connected are 121 and 131 in the pressing tool 200 inserted so that the hollow profile components 120 and 130 through openings in the pressing tool 200 into the tool cavity 230 protrude. The pressing tool 200 is designed so that a positionally accurate fixation of the profile ends 121 and 131 is possible. During the pressing process, the sealing of the pressing tool 200 using seals 241 and 242 accomplished. The pressure-resistant closure elements 125 and 135 at least up to that through the tool seals 241 and 242 approaching formed tool sealing area and thereby cause stabilization of the Hohlprofilwandungen and improve the Kavitätsabdichtung.
  • After the preferably thermosetting plastic mass K is cured as a result of pressure and temperature, the pressing tool 200 opened and the knot structure made 110 be taken as in 5c shown. The manufactured knot structure 110 comprises at least two hollow profile components formed from fiber-plastic composite material 120 and 130 and a connection node formed from fiber-reinforced plastic (with unoriented or optionally also oriented reinforcing fibers, in particular short fibers) 160 who is the profiling 121 and 131 connects positively and cohesively with each other. The connection node 160 may have wall thicknesses in the range of 1 mm to 15 mm, with both equal and different wall thicknesses may be provided. The in the connection node 160 protruding profile ends 121 and 131 the hollow profile components 120 and 130 are by the closing elements formed of plastic foam material 125 and 135 locked. These closure elements 125 and 135 improve the strength, rigidity and crash stability of the nodal structure without significant weight increase 110 ,
  • The kurzfaserhaltige plastic mass K can be premixed and before closing the pressing tool 200 , for example. With the help of the sprayer 300 or the like, into the mold cavity 230 be introduced. The short-fiber-containing plastic mass K may also be SMC or BMC or the like. Furthermore, a layered entry is possible, wherein alternately fiber layers and plastic layers (resin layers) can be introduced. Likewise, the short fiber plastic mass K can also after closing the pressing tool 200 by injection (injection molding) into the mold cavity 230 be introduced.
  • QUOTES INCLUDE IN THE DESCRIPTION
  • This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
  • Cited patent literature
    • DE 10256608 A1 [0002]
    • DE 102014209991 A1 [0002]
    • DE 102007027593 A1 [0002]
    • DE 4423642 C1 [0002]
    • DE 102013226607 A1 [0002]
    • DE 102013220209 A1 [0002]
    • DE 102005061474 B4 [0020]

Claims (10)

  1. Method for producing a node structure ( 110 ) with at least two profile components ( 120 . 130 ) at node-side profile ends ( 121 . 131 ) in a connection node ( 160 ), comprising the steps of: - providing the prefabricated profile components ( 120 . 130 ), wherein at least one of the profile components ( 120 . 130 ) is a hollow profile component; Closing the open profile end ( 121 . 131 ) on the hollow profile component ( 120 . 130 ) by a closure element ( 125 . 135 ); - Positioning the profile ends ( 121 . 131 ) in one of the connection nodes ( 160 ) generating pressing tool ( 200 ); - Performing a pressing process with the addition of fiber-containing plastic compound (K) for the production of the profile ends ( 121 . 131 ) connecting node ( 160 ), wherein the closure element ( 125 . 135 ) penetration of the fibrous plastic mass (K) in the hollow profile component ( 120 . 130 ) prevented.
  2. Method according to claim 1, characterized in that the closure element ( 125 . 135 ) for closing the open profile end ( 121 . 131 ) on the hollow profile component ( 120 . 130 ) is formed of a plastic foam material.
  3. A method according to claim 2, characterized in that the plastic foam material existing closure element ( 125 . 135 ) grafted and into the open profile end ( 121 . 131 ) is glued.
  4. Method according to one of the preceding claims 1 to 3, characterized in that the fiber-containing plastic material (K) for generating the connection node ( 160 ) before closing the pressing tool ( 200 ) into the tool cavity ( 230 ) is introduced.
  5. Method according to one of the preceding claims 1 to 3, characterized in that the fiber-containing plastic material (K) for generating the connection node ( 160 ) after closing the pressing tool ( 200 ) by injection into the mold cavity ( 230 ) is introduced.
  6. Method according to one of the preceding claims, characterized in that at the profiled ends ( 121 . 131 ) corresponding abutment surfaces ( 122 . 132 ), in particular a nested arrangement of these profile ends ( 121 . 131 ) enable.
  7. Method according to claim 6, characterized in that the profiled ends ( 121 . 131 ) in the pressing tool ( 200 ) are positioned between the abutting surfaces ( 122 . 132 ) is a homogeneous spacing gap (S), which is filled during the pressing process with the fibrous plastic mass (K).
  8. Method according to one of the preceding claims, characterized in that at least one of the profile components ( 120 . 130 ) is formed from a fiber plastic composite material.
  9. Node structure ( 110 ) for a vehicle body, in particular produced by a method according to one of the preceding claims, with at least two profile components ( 120 . 130 ) and a connecting node formed from fiber-reinforced plastic ( 160 ), the profile components ( 120 . 130 ) at node-side profile ends ( 121 . 131 ), wherein at least one of the profile components ( 120 . 130 ) is a hollow profile component, whose in the connection node ( 160 ) connected profiled end ( 121 . 131 ) by a closure element ( 125 . 135 ) is closed.
  10. Vehicle body, in particular for a passenger car, with one of profile components ( 120 . 130 . 140 . 150 ) ( 100 ), which has at least one node structure ( 110 ) formed according to claim 9 and / or produced by a method according to any one of claims 1 to 8.
DE102015014361.1A 2015-11-06 2015-11-06 Method for producing a node structure with at least one hollow profile component, and node structure and vehicle body Pending DE102015014361A1 (en)

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