WO2015082691A1

WO2015082691A1 - Method for producing a sandwich composite component

Info

Publication number: WO2015082691A1
Application number: PCT/EP2014/076743
Authority: WO
Inventors: Salvatore Cucchiara
Original assignee: Heyform Bramsche Gmbh
Priority date: 2013-12-06
Filing date: 2014-12-05
Publication date: 2015-06-11

Abstract

The invention relates to a method for producing a sandwich composite component (1), particularly for use in a motor vehicle, in which a first polyurethane reactive mixture (2) is applied to tool halves (3a, b) of an embossing tool (4) in order to form a cover layer (5), and said embossing tool (4) is then closed. The method is characterised in that a second polyurethane reactive mixture (6) for forming a core layer (7) is then introduced into a cavity (8) of said embossing tool (4), and in that said first polyurethane reactive mixture (2) and second polyurethane reactive mixture (6) at least partially simultaneously crosslink forming a foam and thus enter into a compound. The invention also relates to a sandwich composite component (1), particularly for use in a motor vehicle, which has a cover layer (5) comprising a first polyurethane foamed material and a core layer (7) comprising a second polyurethane foamed material. The sandwich composite component is characterised in that said first polyurethane foamed material and second polyurethane foamed material have at least partially simultaneously crosslinked and have thus entered into a compound.

Description

Method for producing a sandwich composite component

The present invention relates to a method for producing a sandwich composite component according to the preamble of claim 1 and to a sandwich composite component according to the preamble of claim 15.

In a motor vehicle, the loading floor of the trunk, the parcel shelf or another flat interior component is regularly executed as a composite panel in a sandwich construction. Such a composite panel has several layers. In such a loading floor or in such a parcel shelf, it is desired that it is stable both lightly and against different loads. The rigidity stems regularly from the outer cover layers, between which the core layer acts as a spacer and regularly has a ngergees specific weight than the outer layers. Frequently, a carpet layer is provided as a lamination on at least one of the outer layers. In addition, it is also regularly desired that such an inner component has insertion elements such as hinge pins, snappers, locks or the like for arrangement and fastening in the motor vehicle. Further possible such insert elements on an inner component are lashing point troughs and rails, loading protection edges etc.

From the prior art and especially from DE 103 10 368 A I, from which the present invention proceeds, it is known to provide a sandwich composite component 1 especially for a loading floor in a motor vehicle with a core layer, which consists essentially of paper honeycomb. This core layer has on both sides to produce the desired stiffness and hardness on a cover layer of foamed polyurethane with a fiber material.

However, such a sandwiched composite member having a core layer of paper honeycomb also has a number of disadvantages. First, it is difficult to make larger surface contours. With such contouring, the core layer is substantially randomly destroyed with respect to its honeycomb structure, so that the stability properties of the resulting surface depend greatly on how the contouring proceeds in relation to the individual honeycombs. An analogous problem arises at the edges of the composite sandwich component, because when a blank of the paper honeycomb the edge quasi is randomly formed by more or less large residual honeycomb. In order to produce a uniform edge here, a supplementary material order is regularly provided, but which leads to relatively much waste. Another problem is that the attachment of the above functional elements on the one hand consuming and on the other hand, the Papi erwabenkem is not well suited to give these insert elements hold so that this hold must be provided substantially completely by the cover layer.

Finally, the paper honeycomb core is also particularly sensitive to the ingress of moisture. For this, even minor damage to the cover layer suffice. Ingress of moisture in turn can lead to both swelling of the paper honeycomb and mold formation.

Although DE 103 10 368 A1 also shows a sandwich composite component in which both the core layer and the cover layers are formed from polyurethane foam. However, here the cover layers are foamed by means of a robot on the core layer, which requires that the core layer is already present as a solid foam. The application of the cover layer shown here therefore requires the completion of the production of the core layer as a previous step.

Based on this prior art, the problem of the invention is to improve the production of such a sandwich composite component in such a way that both work steps are saved and, at the same time, the disadvantages arising from the non-uniform honeycomb structure with regard to contouring possibility, the fastening of insert elements and the Uniformity at the edge of the component to be corrected.

With regard to a method for producing a sandwich composite component having the features of the preamble of claim 1, this problem is solved by the features of the characterizing part of claim 1. With respect to a sandwich composite component having the features of the preamble of claim 15, this problem is solved by the features of the characterizing part of claim 15. Essential to the invention is the recognition that a particularly flexible shaping of a cover layer with a core layer without the mentioned disadvantages of the honeycomb structure can be achieved by applying a polyurethane reaction mixture for the cover layer to the tool halves of a die-forming tool, and After closing the mold embossing tool another polyurethane reaction mixture is introduced into the mold embossing tool, so that the two polyurethane reaction mixtures crosslink at least partially simultaneously and thus also with each other by foaming. In this way, a particularly stable connection between the cover layer and the core layer is formed. At the same time, the process is inexpensive and allows the production of a lightweight sandwich composite component.

The contour of the sandwich composite component is in principle freely selectable. The resulting core layer is free of unwanted voids, gaps or weak points and can easily adapt to the production spatially. Insertion elements can be very flexible and at the same time easily taken into account in this process, wherein the reliable connection with the core layer also ensures a good grip of the insert elements. By selecting the respective polyurethane reaction mixture, the acoustic effectiveness of the sandwich composite component can be adjusted. Likewise, the edge regions of the sandwich composite component can be made uniform in the same manufacturing process and provided with the cover layer. Basically, a core layer of polyurethane is also more temperature resistant than paper honeycomb material. Finally, no compression of the mold halves of the stamping tool during manufacture is required because they must be kept after the introduction of the reaction mixture for the core layer only in the closed state.

The preferred embodiments of the dependent claims 2 to 5 relate to further details for introducing and curing the respective polyurethane reaction mixture for the core and the cover layer.

The dependent claim 7 relates to the mechanical reinforcement of the cover layer by the provision of fibers, whereby the mechanical properties of the cover layer can be flexibly adjusted. The preferred embodiments of the dependent claims 9 and 10 describe possibilities for realizing desired particular acoustic properties of the sandwich composite component (1).

The dependent claims 1 1 to 13 describe the introduction of insert elements in the manufacturing process. Finally, the dependent claim 14 provides a pivotable section on at least one tool half, so that a flanging of the side edges of the sandwich component is made possible for a laminating layer, such as a carpet layer.

Further details, features, objects and advantages of the present invention will be explained below with reference to a drawing showing only exemplary embodiments. In the drawing shows:

1 is a schematic side view of a form embossing tool during a first, preferably provided step of a proposed method,

FIG. 2 shows a schematic side view of the stamping tool of FIG.

1 during a second step of a proposed method,

3 is a schematic side view of the die stamping tool of FIG.

1 during a third step of a proposed method,

4 is a schematic side view of the die stamping tool of FIG.

1 during a fourth step of a proposed method,

5a) is a schematic side view of a first embodiment of a proposed sandwich composite component with a lashing eye and a vent as insert elements, 5b) is a schematic side view of a second embodiment of a proposed sandwich composite component with a collapse area,

6a-b) is a schematic side view of a form embossing tool with pivotable sections during two steps of a proposed method,

Fig. 7a) is a schematic side view of a third Ausruhrungsbeispiels a proposed sandwich composite component with a side rail and an optical waveguide insert elements and

Fig. 7b) is a schematic side view of a fourth embodiment of a proposed sandwich composite component with a toothed lashing rail as insert element.

The proposed method for producing a sandwich composite component 1, which sandwich composite component 1 in the finished state in four exemplary embodiments in each case in Figs. 5a, b) and 7a, b) - and in Figs. 4 and 6b still within the tool - is shown and in particular adapted for use in a motor vehicle, will first be explained with reference to the basic procedural sections of the proposal, which are each shown in FIGS. 2 to 4 explained.

The proposed method comprises applying a first polyurethane reaction mixture 2 to mold halves 3a, b of a die-embossing tool 4 to form a cover layer 5. This is shown in FIG. The first polyurethane reaction mixture 2 regularly comprises an isocyanate component and a polyol component, whereby a polyurethane foam is formed in a manner known per se in a foaming crosslinking reaction. This networking is accompanied by foaming and hardening. The resulting polyurethane foam, which may also be referred to as a first polyurethane foam, then constitutes the cover layer 5 in the present sense. In addition, the polyurethane reaction mixture 2 may comprise further constituents in a manner known per se, for which further examples are discussed below. As shown in FIGS. 1 to 4, the tool halves 3a, b can also be shaped parts of the die 4, which can have different sizes and / or shapes, so that they do not have to form mathematically exact halves of the die 4. In addition to the possibility that more than two mold halves 3a, b are present, each individual mold half 3a, b may also be multi-part, as will be explained in more detail below with respect to FIG. 6.

Conceptually, a distinction is made here and hereafter between the first polyurethane reaction mixture 2 and the cover layer 5 insofar - although the cover layer 5 is formed from the polyurethane reaction mixture 2 - that the cover layer 5 is the result of a cross-linking process of the polyurethane reaction mixture 2 and thus by the conclusion This cross-linking process arises, which cross-linking process is accompanied by a volume expansion.

The proposed method further includes closing the mold embossing tool 4, which takes place in the transition from FIG. 2 to FIG. 3. It should be noted that even if the crosslinking of the polyurethane reaction mixture 2 already begins here, at least this does not exert any counter-pressure to close the mold-stamping tool 4 and thus the mold-stamping tool 4 can be closed without applying a pressing force.

The proposed method is characterized in that subsequently a second polyurethane reaction mixture 6 for forming a core layer 7 is introduced into a cavity 8 of the form-stamping tool 4. This is shown in FIG. 3. In principle, the second polyurethane reaction mixture 6 may be identical to the first polyurethane reaction mixture 2, but preferably the second polyurethane reaction mixture 6 will differ from the first polyurethane reaction mixture 2 in order to achieve different properties in the core layer 7, the Ratio to the second polyurethane reaction mixture 6 is mutually the same as that between the first polyurethane reaction mixture 2 and the cover layer 4. Also, the second polyurethane reaction mixture 6 may comprise further constituents in addition to an isocyanate component and a polyol component. In particular, that can second polyurethane reaction mixture 6 be enriched with carbon blends. The resulting from the second polyurethane reaction mixture 6 foam may also be referred to as a second polyurethane foam.

As shown, the cavity 8 is formed by the closing of the die 4 and in particular by the tool halves 3a, b. Specifically, the second polyurethane reaction mixture 6 is introduced through a supply line 9 into the cavity 8.

The proposed method is further characterized in that the first polyurethane reaction mixture 2 and the second polyurethane reaction mixture 6 at least partially co-foaming and enter into a compound. In other words, the respective crosslinking process overlaps, so that the crosslinking process of the one polyurethane reaction mixture does not start until the crosslinking of the other polyurethane reaction mixture has been completed. The connection between the first polyurethane reaction mixture 2 and the second polyurethane reaction mixture 6 already arises from the fact that - as shown in FIG. 3, these occur during their at least partially simultaneous

Networking process in contact with each other.

As shown, the die-stamping tool 4 has heating elements 10 with which the temperature conditions during manufacture and in particular for crosslinking can be set and controlled. Furthermore, the die-stamping tool 4 also has a discharge line 11, through which the escape of material from the cavity 8 can be permitted during the intumescent cross-linking.

FIG. 4 illustrates the state after completion of the crosslinking of the first polyurethane reaction mixture 2 and of the second polyurethane reaction mixture 6, whereby the cover layer 5 and the core layer 7 have been formed. Evidently, the intumescent crosslinking is accompanied by a volume expansion of the respective polyurethane reaction mixture, so that the cavity 8 is substantially completely filled, except for possibly existing further structures in the mold-embossing tool 4 - which will be discussed below. Although actually the cover layer 5 is arranged on both surface sides of the core layer 7 - and also on the edge sides of the core layer 7 - and thus basically a distinction could be made between an upper and a lower cover layer 5, here and below is always a single one

Top layer 5 the speech, wherein the cover layer 5 on all sides as far as there - the core layer 7 is meant. The stamping tool 4 further comprises a suction device 12, which is arranged in the illustration on the upper mold half 3a. This is used to suck the applied to this mold half 3a first polyurethane Reaktionsgemi cal 2, including a film, not shown here on the Werkzeugzeughäl fte 3a is arranged.

It is now preferred that the second polyurethane reaction mixture 6 - as shown in FIG. 3 - is poured liquid into the cavity 8. This means that preferably the second polyurethane reaction mixture 6 is still substantially uncrosslinked. In order to take into account the volumetric expansion during the crosslinking, preferably the polyurethane reaction mixtures 2, 6 do not completely fill the cavity 8, so that-at least immediately-any desired gases remain in the cavity 8 after pouring.

Since the first polyurethane reaction mixture 2 is applied first, it is preferred that the crosslinking of the first polyurethane reaction mixture 2 begins before the crosslinking of the second polyurethane reaction mixture 6. In order to obtain the most uniform and even bonding surface between the cover layer 5 and the core layer 7, it is again preferred that the crosslinking of the first polyurethane reaction mixture 2 and the second polyurethane reaction mixture 6 is completed substantially simultaneously.

As already stated, no pressing force has to be used to close the stamping tool 4. Although the mold halves 3a, b must be kept closed during the cross-linking process, a holding force is sufficient for this purpose. This corresponds to the preferred embodiment in which during the cross-linking of the first polyurethane reaction mixture 2 and the second polyurethane reaction mixture 6, an opening force acts on the tool halves 3a, b, which is based on a cross-linked volumetric expansion of the first polyurethane reaction mixture 2 and of the second polyurethane - Reaction mixture 6 is based. It is preferred that this opening force is based essentially only on this network-related volume expansion. Thus, a blowing pressure into the cavity 8 does not matter for this purpose.

Through and during the cross-linking, the first reaction mixture 2 is pressed outwardly from the second reaction mixture 6 to the tool halves 3a, b. Accordingly, it is preferred that the first polyurethane reaction mixture 2 and the second polyurethane reaction mixture 6 form a frictional connection during crosslinking to the cover layer 5 and to the core layer 7. In particular, the second polyurethane reaction mixture 6 exerts a surface pressure on the first polyurethane reaction mixture 2 during crosslinking.

The method described makes it possible to cover the core layer 7 essentially from all sides of the cover layer 5. Thus, it is advantageously possible that the cavity 8 and the sandwich composite component 1 are substantially plate-shaped. Here it is further preferred that the cover layer 5 also covers the edge sides 13 of the sandwich composite component 1. In particular, the cover layer 5 can substantially completely cover the edge sides 13 of the sandwich composite component 1.

In order to achieve advantageous mechanical properties of the cover layer 5 and thus of the composite sandwich component 1 as a whole, fibers can be used for reinforcement. It is therefore preferred that to the first polyurethane reaction mixture 2, a fiber material is applied to the tool halves 3a, b and the cover layer 5 is formed by the first polyurethane reaction mixture 2 and the fiber material fiber composite cover layer.

The proposed method also makes it possible to integrate the lamination process in a simple manner. This is preferably done by applying a laminating layer 14 to at least one mold half 3b for connection to the first polyurethane reaction mixture 2 during the crosslinking of the first polyurethane reaction mixture 2. FIG. 1 shows how this laminating layer 14, which, for example, a carpet layer may be applied to the tool half 3b prior to the application of the first polyurethane reaction mixture 2. Alternatively or additionally, a Such Kaschierlage 14 are applied to the other tool half 3a.

One way to produce a sandwich composite component 1 with certain desired properties is to influence the core layer 7 and, above all, the characteristics of its pores. This can be done excellently via a manipulation of the second polyurethane reaction mixture 6. According to a preferred embodiment of the proposed method, a pore property of the core layer 7 is determined for a given property profile of the sandwich composite component 1. This pore property may in particular be a pore size. Preferably, the pore property is determined by an additive for the second polyurethane reaction mixture 6, which may be above all a liquid additive, which can dissolve in particular in the second polyurethane reaction mixture 6. Alternatively or additionally, the pore property can be determined by a mixing ratio of the second polyurethane reaction mixture 6, wherein in particular a mixing ratio of their 1 soc yanatko mponente and their polyol component comes into question. The predefined property profile may be an acoustic property profile, in which case in particular a property profile for a given sound insulation and / or a predetermined sound attenuation may be provided.

It is also possible to add to the second polyurethane reaction mixture 6 in particular a solid filler for a given property profile. In particular granules of expanded polypropylene, expanded polystyrene, in particular synthetic rubber or another plastic in question. Likewise, fibers and in particular glass fibers may be provided or a heavy layer preferably formed of plastic. A granular core layer 7a formed with such a filler is shown in FIG. 7a. Again, the property profile is preferably an acoustic, especially as described above, and / or a mechanical one. Thus, the weight and other mechanical properties can be adjusted by such a filler. Preferably, the filler remains after crosslinking of the second polyurethane reaction mixture 6 in the core layer 7. This means z. B. that he does not dissolve. The proposed method allows the provision of above-mentioned insert elements 15 in the sandwich composite component 1 in a simple manner. Specifically, an insert element 15 may be arranged in the mold embossing tool 4 prior to introduction of the second polyurethane reaction mixture 6 such that the insert element 15 is continuous with the second polyurethane reaction mixture 6 and after its crosslinking with the core layer 7, optionally in the presence of intermediate layers , connected is. This means that no macroscopic, so beyond the foam bubbles, free spaces around the insert element 15 are present. Preferably, the insert element 15 is then also connected to the cover layer 5. In this way, a good grip is ensured because the core layer 7 in particular does not have the inhomogeneities of about paper honeycomb. Preferably, the insert element 15 is inelastic.

In particular, it is provided that a position of the insert element 15 is predetermined and that the insert element 15 during insertion and during the crosslinking of the second polyurethane reaction mixture 6 maintains the predetermined position. The insert element 15 is thus not moved by the second polyurethane reaction mixture 6 in the cavity 8 or even washed away.

In Fig. 5a as such insert elements 15, a vent 16 and a lashing eye 17 are shown. If, as preferred and illustrated for the lashing eye 17, that insertion element 15 is repeatedly mi mi the cover layer 5 in conjunction, which can also be described as penetrating the core layer 7, a particularly good grip is guaranteed. This is further ensured by the likewise preferred Christmas tree structure of an insert element 15, here the lashing eye 17.

Further preferred insertion elements 15 are the side rail 18 shown in FIG. 7a and the toothed lashing rail 19 shown in FIG. 7b. These also realize that preferred embodiment of the insertion element 15, in which the insertion element 15 openings 20 for receiving the first polyurethane reaction mixture 2 and / or the second polyurethane reaction mixture 6, whereby the hold of the insert member 15 is further improved. According to a preferred embodiment, the egg is geelement 15 an optical waveguide 1 5a, which is also shown in Fig. 7a.

If the connection behavior between the second polyurethane reaction mixture 6 and the insert element 15 is to be improved, according to a preferred embodiment, a further binding material, which may likewise be a polyurethane reaction mixture, can be applied to the insert element 15 for connection to the second polyurethane reaction mixture 6 during the crosslinking of the second Polyur- ethane reaction mixture. 6

In order to minimize the risk of detachment of the lamination, it is often desired that a laminating layer 14 provided in principle for one main surface of the sandwich composite component 1 does not extend completely over only one edge side 13 of the sandwich composite component 1, but even at least partially on the opposite one Main surface is arranged. This arrangement of the laminating layer 14 may also be referred to as flanging. For this purpose, it is preferably provided, as shown in FIGS. 6a and 6b, that at least one tool half 3a has at least one pivotable section 21a, b, which is folded over in order to close the stamping tool 4, such that the cover layer 5 is pivotable on the pivoting Section 21a, b is at least partially connected to the core layer 7 on two opposite sides. Preferably, the liner 14 is applied to the pivotable portion 21 a, b.

A proposed sandwich composite component 1, which is especially adapted for use in a motor vehicle and is shown in particular in FIGS. 5 a b) and 7 a b), has a cover layer 5 with a first polyurethane foam and a core layer 7 with a second polyurethane foam on.

The proposed sandwich composite component 1 is characterized in that the first polyurethane foam and the second polyurethane foam have at least partially co-foaming and thereby entered into a connection. Preferably, the proposed composite sandwich component I has been prepared by a proposal according to the method. The embodiments and features described for the proposed method apply mutatis mutandis to the proposed sandwich composite component 1, wherein in particular the first polyurethane foam by crosslinking the first polyurethane reaction mixture 2 and the second polyurethane foam by crosslinking the second polyurethane reaction mixture 6 has emerged.

It is preferably provided that the sandwich composite component 1 comprises a, preferably inelastic, insert element 15 and that the insert element 15 is connected to the core layer 7 in a continuous manner, optionally in the presence of intermediate layers. In particular, the insert element 15 may be connected to the cover layer 5. Reference is made to the above preferred features and embodiments of the insert element 15.

Another advantage is that a largely free contouring of the surface of the sandwich composite component 1 can be made. This possibility in turn can also be used to design mechanical properties of the sandwich composite component 1. Thus, by specific weakening of the thickness of the sandwich composite component 1, a defined and in particular also directionally related fracture behavior of the sandwich composite component 1 can be achieved. Fig. 5b shows a corresponding embodiment. Here, according to an advantageous embodiment, it is provided that the composite sandwich component 1 has a collapse area 22 with respect to a collapse direction 23. Such a collapsing region 22 can in particular - and as shown - be realized in that the collapse region 22 has a wave-like or rectangular comb course of the cover layer 5 with respect to a thickness of the sandwich composite component 1. In the event of an impact in the collapse direction 23, the wave or rectangular shapes preferably break before a break of the sandwich composite component 1 occurs elsewhere. Here, for example, it is possible to use such a sandwich composite component 1 as a loading floor, thereby designing the collapsing area 22 and the collapse direction 23 for a rear crash of the motor vehicle.

Claims

claims

1. A method for producing a sandwich composite component (1), in particular for use in a motor vehicle, comprising applying a first polyurethane reaction mixture (2) to mold halves (3a, b) of a forming tool (4) to form a cover layer ( 5) and comprising closing the mold-stamping tool (4),

characterized in that

then a second polyurethane reaction mixture (6) for forming a core layer (7) in a cavity (8) of the compression molding tool (4) is introduced and that the first polyurethane reaction mixture (2) and the second polyurethane reaction mixture (6) at least partly simultaneously frothy and connect at the same time.

2. The method according to claim 1, characterized in that the second polyurethane reaction mixture (6) is liquid, preferably substantially unburned, poured into the cavity (8), in particular, that after pouring gases in the cavity (8) remain ,

3. The method according to claim 1 or 2, characterized in that the crosslinking of the first polyurethane reaction mixture (2) before the crosslinking of the second polyurethane reaction mixture (6) begins and / or that the crosslinking of the first polyurethane reaction mixture (2) and of the second polyurethane reaction mixture (6) is completed substantially simultaneously.

4. The method according to any one of claims 1 to 3, characterized in that during the crosslinking of the first Pol yurethan- reaction mixture (2) and the second polyurethane reaction mixture (6) an opening force on the tool halves (3a, b) acts, which , Preferably substantially only, based on a crosslinking tion-based volume expansion of the first polyurethane reaction mixture (2) and the second polyurethane reaction mixture (6).

5. The method according to any one of claims 1 to 4, characterized in that the first polyurethane reaction mixture (2) and the second polyurethane Reaction mixture (6) in the cross-linking to the cover layer (5) and the core layer (7) form a frictional connection, preferably, that the second polyurethane reaction mixture in the cross-linking a surface pressure on the first polyurethane reaction mixture exerts.

6. The method according to any one of claims 1 to 5, characterized in that the cavity (8) and the sandwich composite component (1) are substantially plate tenförmig, preferably that the cover layer (5) and the edge sides (13) of the Sandwich composite component (1), in particular substantially completely covers.

7. The method according to any one of claims 1 to 6, characterized in that to the first polyurethane reaction mixture (2) a fiber material on the tool halves (3a, b) is applied and the cover layer (5) one of the first polyurethane reaction mixture ( 2) and the fiber composite formed fiber composite cover layer.

8. The method according to any one of claims 1 to 7, characterized in that a Kaschierlage (14) is applied to at least one mold half (3b) for connection to the first polyurethane reaction mixture (2) during crosslinking of the first polyurethane reaction mixture (2 ).

9. The method according to any one of claims 1 to 8, characterized in that a pore property, in particular a pore size, the core layer (7), preferably by an additive and / or a mixing ratio of the second polyurethane reaction mixture (6) is determined for a predetermined, preferably acoustic, property profile, in particular for a given sound insulation and / or sound attenuation of the sandwich composite component (1).

10. The method according to any one of claims 1 to 9, characterized in that added to the second polyurethane reaction mixture (6), in particular solid, filler for a given, in particular acoustic and / or mechanical, property profile of the sandwich composite component (1) is, further in particular, that the filler after crosslinking of the second polyurethane reaction mixture (6) in the core layer (7) remains.

11. The method according to any one of claims 1 to 10, characterized in that a, preferably inelastic, insert element (15) prior to introducing the second polyurethane reaction mixture (6) is arranged in the form stamping tool (4) that the insert element (15 ) is connected to the second polyurethane reaction mixture (6) and after its crosslinking with the core layer (7) area by area continuously, optionally in the presence of intermediate layers, preferably, that the insert element (15) is connected to the cover layer (5).

12. The method of claim 1 1, characterized in that the insert element (15) is an outflow (16), a lashing eye (17), a side rail (18), a toothed lashing rail (19) or an optical waveguide (15a) ,

13. The method of claim 1 1 or 12, characterized in that a binding material is applied to the insert element (15) for connection to the second polyurethane reaction mixture (6) during the crosslinking of the second polyurethane reaction mixture (6).

14. The method according to any one of claims 1 to 13, characterized in that at least one mold half (3a) has at least one pivotable portion (21a, b) which is folded to close the mold embossing tool (4) so that the cover layer (5) on the pivotable portion (21 a, b) at least partially on two opposite sides with the core layer (7) is connected, preferably, that the Kaschierlage (14) on the pivotable portion (21 a, b) is applied.

15. Sandwich composite component (1), in particular for use in a motor vehicle, having a cover layer (5) comprising a first polyurethane foam and a core layer (7) comprising a second polyurethane foam,

characterized in that

the first polyurethane foam and the second polyurethane foam have at least partially co-foaming and thereby entered into a connection.

16. sandwich composite component according to claim 15, characterized in that the sandwich composite component (1) was prepared by a method according to any one of claims 1 to 14.

17. sandwich composite component (1) according to claim 15 or 16, characterized in that the sandwich composite component (1) comprises a, preferably inelastic, insert element (15) and that the insert element (15) with the core layer (7) area by area , optionally in the presence of intermediate layers, is connected, in particular, that the insert element (15) is connected to the cover layer (5).

18. Sandwich composite component according to one of claims 15 to 17, characterized in that the sandwich composite component has a collapsing region (22) with respect to a collapse direction (23), preferably, that the collapse region (22) has a wave-like or rectangular comb course of the cover layer (5) with respect to a thickness of the sandwich composite member (1).