DE102021105792A1 - Sandwich component, turbine jet engine and method for its manufacture - Google Patents

Abstract

The invention relates to a sandwich component comprising - a first cover layer made of a cover layer material, - at least a second cover layer made of a cover layer material and - an intermediate core layer formed from a core layer material, which on average has a lower mass density than the cover layer material of the first cover layer and the second cover layer , characterized in that- the core layer material of the core layer has a proppant made of a solid material and at least one additional filler embedded in the proppant,- wherein a filler of a first type and a filler of at least a second type are provided,- wherein the core layer has a first integral having a region in which the core layer material contains predominantly the filler of the first type, and having at least a second integral region in which the core layer material contains predominantly the filler of the second type,- the filler of the first type differing from the filler the at least one second type differs with respect to at least one physical property such that the first integral portion of the core layer has a different mechanical and/or thermal property from the second integral portion of the core layer.

Description

The invention relates to a sandwich component which is produced in a sandwich construction and has a first cover layer, at least one second cover layer and an intermediate core layer. The invention also relates to a turbine jet engine and a method for producing such a sandwich component.

Due to the weight-specific strength and rigidity, fiber composite components made from a fiber composite material are now indispensable. Fiber composite materials generally have two essential main components, namely a fiber material on the one hand and a matrix material embedding the fiber material on the other. To produce the fiber composite component, the fiber material is introduced into a mold and the matrix material embedding the fiber material is then cured, usually under heat and pressure, so that the fiber material and matrix material form an integral unit. In this way, the reinforcing fibers of the fiber material are forced in their specified direction and can thus carry the loads that occur.

A distinction is made between dry fiber material, which is impregnated with the matrix material in a later infusion process, and pre-impregnated fiber materials (also called prepregs), which are already impregnated with the matrix material before being placed in the mold.

In order to take the idea of lightweight construction further into account, it is not only known to adapt the mechanical properties of such fiber composite components locally, but also to increasingly produce fiber composite components in a sandwich construction. In this case, a core layer, which is formed from a core layer material and has a lower mass density than the cover layers, is arranged between cover layers made of a fiber composite material. As a result, the mechanical properties of the entire component, in particular the bending and torsional properties, are significantly improved without adding significantly more weight to the component as a result.

Sandwich components, in which appropriate support material is introduced between the cover layers required for strength (e.g. fiber layers of a fiber composite material), which are important for the strength of the entire component, are of essential importance. These supporting materials usually have poor mechanical properties with a low density and, according to Steiner's theorem, significantly increase the moment of inertia of the sandwich component while the mass remains almost the same, which results in a corresponding increase in rigidity.

There are two main design forms for the core layer, namely solid materials and honeycomb structures. Honeycomb structures are made of paper, cardboard, metal or plastic, for example, and have a large number of cavities that are formed by the individual honeycombs. Such honeycomb structures are particularly suitable when a particularly high degree of lightweight construction is required. However, due to the cavities formed by the honeycomb structure, core layers in a honeycomb structure are sensitive to impact and pressure in the direction of the core layer, so that sandwich components of this type are not suitable for particularly exposed locations (e.g. as turbine blades of jet engines).

Solid materials such as balsa wood, plastics or foams (e.g. polymer foams), on the other hand, have a higher density and thus inevitably lead to a higher weight input into the component, but are significantly less sensitive to impact and pressure in the direction of the core layer, so that it is significantly less common a force acting in the direction of the core layer causes the core layer to fail.

Ganges Supporting material (such as syntactic foams made of plastic materials), which are selected for core layers made of a solid material, are selected on the basis of density, fire protection specifications, economic efficiency, but also the thermal and mechanical loads to be expected. If the thermal and mechanical loads differ greatly across the entire component, the selection is usually based on the highest required resilience.

If the core layer material is selected according to the globally dimensioned thermal and/or mechanical maximum load, the maximum possible lightweight construction potential may not be exploited in areas with low loads, with core materials with low density usually reducing the thermal and/or mechanical properties.

It is therefore the object of the present invention to specify an improved sandwich component and an improved method for its production, in which the core layer consists of a solid material and yet the greatest possible lightweight construction potential can be exploited, without having to make the manufacturing process of such sandwich components more complex.

The object is achieved with the sandwich component according to claim 1 and the method for its production according to claim 8 according to the invention. Advantageous configurations of the invention can be found in the corresponding subclaims.

According to patent claim 1, a sandwich component is proposed, which generically has a first cover layer made of a cover layer material, at least one second cover layer made of a cover layer material and an intermediate core layer formed from a core layer material, which on average has a lower mass density than the cover layer material of the first cover layer and the second top layer.

Both the first cover layer and the second cover layer can be made from the same cover layer material, for example from a fiber composite material as the cover layer material. However, it is also conceivable that the first cover layer is made from a first cover layer material, while the second cover layer is made from a second cover layer material and the two cover layer materials are different from one another.

As is usual with sandwich components, the core layer has a lower average mass density than the cover layer material in order to take account of the idea of lightweight construction. There may be areas of the core layer that have a greater bulk density than the skin layer material. However, on average over the entire volume of the core layer, the mass density is lower than the entire cover layers or the entire volume of the cover layers.

According to the invention, it is now provided that the core layer material of the core layer has a support made of a solid material and at least one additional filler embedded in the support, with a filler of a first type and a filler of at least a second type being provided. The solid material is a material that essentially fills the entire core layer. This also includes foams, for example polymer foams (e.g. syntactic foams). A solid material within the meaning of the present invention is not understood to mean a honeycomb structure. This support material formed from a solid material is now supplemented by at least one additional filler in order to change the properties of the support material of the core layer and to be able to adapt it to specific boundary conditions.

The invention provides that the core layer has a first integral area in which the core layer material predominantly contains the filler of the first type and has at least a second integral area in which the core layer material predominantly contains the filler of the second type, with the filler being the first type differs from the filler of at least one second type with respect to at least one physical property such that the first integral portion of the core layer has a different mechanical and/or thermal property from the second integral portion of the core layer.

Accordingly, a core layer is proposed which has a first integral region and a second integral region, each of these regions predominantly containing one of the fillers of the first type or of at least the second type. Since the filler of the first type differs from the filler of the second type with regard to at least one physical property, different mechanical and/or thermal properties arise in these areas of the core layer, which result from the variation in the properties of the different fillers.

This creates a variance in the mechanical and/or thermal properties in the core layer, so that the core layer can be optimally adapted to the given boundary conditions. Physical properties in which filler types differ are bulk density, bulk density, shape, geometry, and/or material composition.

Such a core layer is probably microscopic as well as macroscopic multi-phase.

In this context, predominantly is understood to mean that at least 70%, preferably at least 90%, particularly advantageously 100% of all fillers in the respective area correspond to the filler of the corresponding type in this area. This expresses the fact that it is not absolutely necessary for the respective area to contain the respective filler of the corresponding type homogeneously, but that a mixture of the filler of the first type and the filler of the second type can also be present in one area. The only decisive factor is that the corresponding type of filler predominates for the respective area and thus the physical and mechanical properties of the core layer of this area are determined by the predominant type of filler.

By forming integral areas within the core layer with different types of fillers, the core layer can be locally adapted to specific Boundary conditions are adjusted in the intended use, whereby the idea of lightweight construction can be taken into account even more. The integral design of the core layer and the various integrally embedded areas also simplifies the manufacture of such sandwich components. This means that different cores do not have to be produced, which are then arranged between the cover layers, which can entail difficulties in terms of production technology due to tolerances. In addition, a smooth transition from the first to the second area can be realized without a hard jump as would be the case with adjacent cores (gradient of the proportions of the first type of filler to the second type of filler).

In addition, such sandwich components can be produced very well with cover layers made of a fiber composite material, since the integral construction of the core layer with variation of the fillers can be adapted and optimized very well to the production process of fiber composite components.

Integral here means that the areas of the core layer are an integral part of the core layer and are preferably produced in a common process step. Separate cores that are combined to form a core layer are not covered by this.

The fillers can differ in terms of mass density as at least one physical property. For example, the bulk density can differ as a physical property. This is the density of a material poured into a given volume.

According to one embodiment it is provided that the fillers are solid microspheres, hollow microspheres and/or microchips. The term “micro” includes elements that are less than 1 cm in size in at least one spatial direction, preferably in all spatial directions, preferably less than 1 mm.

According to one embodiment it is provided that the fillers contain a glass material, a metal material, a plastic material, carbon fiber material and/or a glass fiber material or are formed from such a material.

According to one embodiment it is provided that the supporting material is a plastic material, in particular a matrix material of a fiber composite material. In this embodiment, it is particularly advantageous if the cover layers are also made from a fiber composite material, so that the same matrix material can be used both for the supporting material and for the matrix of the fiber composite material. This allows a highly integral component to be produced.

According to one embodiment, it is provided that the first cover layer and the second cover layer are connected to one another in an edge region of the sandwich component. It is preferred here that the cover layers of the sandwich component are connected to one another at two opposite edge regions and only at least one end side allows a view of the core layer. It is very particularly preferred if the cover layers are connected to one another in a completely peripheral edge area of the sandwich component and the core layer is completely covered by the cover layers in the edge area.

It is included in the core idea of the invention when a turbine jet engine has at least one sandwich component as described above. Such a sandwich component can be part of the fan, for example.

The object is also achieved with the method for producing a sandwich component, wherein the sandwich component has a first cover layer made of a cover layer material, a second cover layer made of a cover layer material and an intermediate core layer formed from a core layer material, wherein a first integral region of the core layer is prepared in which the core layer material contains predominantly the filler of the first type, and a second integral portion of the core layer is prepared in which the core layer material contains predominantly the filler of the second type such that the filler of the first type differs from the filler distinguishing at least one second type with respect to at least one physical property such that the first integral portion of the core layer has a different mechanical and/or thermal property from the second integral portion of the core layer.

According to the invention, it is provided that the core layer is produced from a support material made of a solid material and at least one additional filler embedded in the support material, with a filler of a first type and a filler of at least a second type being used, with a first integral region of the core layer being produced is prepared in which the core layer material contains predominantly the filler of the first type, and a second integral portion of the core layer is prepared in which the core layer material contains predominantly the filler of the second type such that the core layer has integral portions of having different mechanical and/or thermal properties.

Accordingly, a first integral region of the core layer is produced in which predominantly the filler of the first type is used, and at least a second integral region in which the filler is predominantly used of the second type. It is conceivable here that material compositions are first provided or produced which contain the supporting material and the filler of the respective type, with these material compositions being intended for further processing as core layer material and ultimately intended to form the core layer. In other words, the core layer of the sandwich component is later made from these material compositions, which form a kind of semi-finished product for further processing in the manufacturing process. The provision of such material compositions also includes the production of the material compositions from the supporting material, the respective filler and optionally other components.

For example, a first material composition is provided, which is made from the support and the filler of the first type. Furthermore, at least a second material composition is provided, which is produced from the support material and the filler of the second type. To form the core layer, the first material composition and the second material composition and optionally a further material composition are now used in the production process in order to produce the core layer from these material compositions provided.

According to one embodiment it is provided that a first material composition is provided as part of the core layer material, which contains the proppant and the additional filler of the first type, and that a second material composition is provided as part of the core layer material, which contains the proppant and the additional filler of the second Art contains, wherein the material compositions are successively introduced into a mold corresponding to the shape and geometry of the core layer in such a way that the first region and the second region of the core layer are formed integrally, the material compositions introduced into the mold are consolidated and the core layer thus formed in the mold is removed from the mold, and the consolidated core layer is arranged between cover layer material of the cover layers to produce the sandwich component.

In this embodiment, the core layer is first produced separately and has the first area and the at least second area integrally, with the production of the core layer using a molding tool being used to introduce the previously provided material compositions. The mold is preferably a closed mold into which the material compositions can be filled. Subsequently, the material compositions are consolidated in the mold, i. H. the material compositions are converted into the corresponding material end product. This can be done, for example, by tempering the material compositions, as a result of which the material compositions harden or consolidate, for example (for example in the case of thermoplastics). The term "consolidation" is therefore understood to mean the conversion of the material compositions into the material properties of the end product. In the case of a matrix material, this can be done, for example, by a crosslinking reaction.

The core layer produced separately in this way is then arranged between the cover layers of the sandwich component to be produced. A distinction can be made here between either the cover layers also being produced separately and then the sandwich component being assembled from the separately produced cover layers and the separately produced core layer. It is also conceivable, however, for the cover layers to be produced together in connection with the core layer, which has already been produced separately.

According to one embodiment, it is therefore provided that the cover layer material of the first cover layer is introduced into a mold corresponding to the shape and geometry of the sandwich component, the consolidated core layer is then arranged on the cover layer material and the cover layer material of the second cover layer is then applied to the arranged core layer.

The top layer material is also consolidated and then forms a coherent sandwich component with the core layer. This procedure is particularly advantageous when the cover layer material is a fiber composite material and the fiber material of the fiber composite material is introduced into the mold for producing the cover layers. The fiber material can be a dry fiber material or an already pre-impregnated fiber material. Then between the fibrous material of the first cover layer and the fibrous material of the second cover layer is already produced and consolidated Core layer is inserted, the mold is closed and the matrix material of the cover layers, which is infused into the fiber material, is cured. If a dry fiber material was used, the dry fiber material is infused with the matrix material in an infusion process and the infused matrix material is then cured. If a pre-impregnated fiber material is used, this infusion step can optionally be omitted.

A highly integral sandwich component can be produced by using an integral and one-piece core layer with a plurality of areas with different mechanical and/or thermal properties. This minimizes the risk of so-called “runners” forming in the area of adjoining core parts, along which the matrix material incorrectly flows during the infusion process and thus the cover layers may not be completely infused with the matrix material.

According to an alternative embodiment for producing the sandwich component, it can be provided that a first material composition is provided as part of the core layer material, which contains the support material and the additional filler of the first type, and that a second material composition is provided as part of the core layer material, which contains the support material and contains the additional filler of the second type, wherein, to produce the sandwich component, the material compositions are successively introduced into a cavity formed by the first cover layer material and the second cover layer material in such a way that the first area and the second area of the core layer are formed integrally, and wherein the introduced into the cavity material compositions for the production of the core layer are consolidated.

In this production variant, the cover layer material is preferably not yet consolidated at the time the material compositions are filled into the cavity. Rather, in this production variant, both the cover layer material for the cover layers and the material compositions for the core layer are consolidated in a common process step, resulting in a highly integral component.

However, it is also conceivable that the cover layers are already pre-consolidated and thus the material compositions are filled into the cavity between the already consolidated cover layers. Accordingly, according to a further embodiment, it is provided that the cover layer material is introduced into a mold that corresponds to the shape and geometry of the sandwich component and is consolidated in a first process step, so that a cavity is formed between the consolidated cover layers, with subsequent in the formed by the consolidated cover layers Cavity the material compositions are successively introduced and consolidated in a second process step.

According to a further alternative embodiment for the production of the sandwich component, it is provided that a dry fiber material of a fiber composite material is introduced as a cover layer material into a mold that corresponds to the shape and geometry of the sandwich component, so that a cavity is formed between the cover layers, into which the filler of the first Art and the filler of at least the second type are introduced in such a way that the first region and the second region are formed, the dry fiber material and the cavity filled with the fillers then being infused and consolidated with a matrix material.

In this production variant, the filler is filled directly into the material between the cover layers or between the cover layer material without the support material of the core layer, with the support material being infused into the cavity filled with the fillers and then consolidated by a subsequent infusion process.

This production variant is particularly advantageous if dry fiber material of a fiber composite material is used for the cover layer material, whereby the infusion process for infusing the matrix material is not only intended to saturate the fiber material of the cover layers, but also to serve as a support material for the core layer and thus also for those formed between the cover layers and infused with the fillers filled cavity. In a common process step, both the fiber material and the core layer can be infused with the matrix material and then cured in a common process step.

In this way, not only can a core layer be created with integral areas of different properties, but also an integral application of the core layer to the respective top layer.

According to a further alternative embodiment for the production of the sandwich component, it is provided that a pre-impregnated fiber material of a fiber composite material is introduced as a cover layer material into a mold corresponding to the shape and geometry of the sandwich component, so that a cavity is formed between the cover layers into which one after the other the filler of the first type and the filler of at least the second type are introduced in such a way that the first area and the second area are formed, with pressure then being applied to the cover layer material in the direction of the cavity, so that the matrix material contained in the pre-impregnated fiber material in infused the cavity filled with the fillers.

Here, the support material is pressed out of the already pre-impregnated cover layer by applying pressure and thus infuses into the remaining cavity filled with the fillers, so that a more extensive infusion process can be avoided.

• 1 schematische Darstellung des erfindungsgemäßen Sandwichbauteils;
• 2 schematische Darstellung der Herstellung eines solchen Sandwichbauteils in einer ersten Ausführungsform;
• 3 schematische Darstellung der Herstellung eines solchen Sandwichbauteils in einer zweiten Ausführungsform;
• 4 schematische Darstellung der Herstellung eines solchen Sandwichbauteils in einer dritten Ausführungsform.

The invention is explained in more detail by way of example on the basis of the accompanying figures. Show it:

• 1 schematic representation of the sandwich component according to the invention;
• 2 schematic representation of the production of such a sandwich component in a first embodiment;
• 3 schematic representation of the production of such a sandwich component in a second embodiment;
• 4 schematic representation of the production of such a sandwich component in a third embodiment.

1 schematically shows a sandwich component 10 in a perspective side view and in a sectional view AA. The sandwich component 10 has a first cover layer 11 and an opposite second cover layer 12 which touch in an edge area 13 or are connected in the edge area 13 . In this way, a sandwich component 10 can be realized that is closed at least in the longitudinal direction on the two longitudinally running edge regions 13 .

The two cover layers 11 and 12 enclose a core layer 14 which is formed from a support material 15 and fillers 16 embedded in the support material 15 . The fillers 16 are in the embodiment of 1 arranged to occupy a majority of the core layer 14, with the voids located between the fillers 16 being occupied by the proppant 15. The fillers 16 can be spherical, in particular glass beads. However, microchips of fiber material that are used as fillers 16 are also conceivable.

Like in the 1 shown in the slightly perspective view, the core layer has a total of 3 areas, namely a first core layer area 14a, a second core layer area 14b and a third core layer area 14c.

Each of these core layer areas 14a to 14c has the same supporting material 15, while the fillers 16 in the respective areas 14a to 14c are different from one another. Thus, in the first core layer region 14a there is a first filler 16a which has a first bulk density. It is conceivable, for example, that the first filler 16a of the first core layer region 14a has the highest mass density of all fillers. The second core layer region 14b has a second filler 16b which has a second bulk density which differs from the first bulk density of the first core layer region 14a. The second mass density can be lower than the first mass density. The third core layer region 14c may in turn have a third filler 16c having a third bulk density different from the first bulk density and the second bulk density. However, it is also conceivable that the third filler 16c is identical to the first filler 16a, so that only the second core layer region 14b lying in between differs from the first core layer region 14a in the third core layer region 14c.

For example, the first filler 16a can be formed by solid glass spheres that have a diameter of less than 1 cm, preferably less than 1 mm. The second filler 16b can be formed, for example, by hollow glass spheres, which have a lower mass density and bulk density than the solid glass spheres of the first filler 16a due to the cavity. Finally, the third filler can be formed by micro-fiber chips (glass fiber material, carbon fiber material, plastic material, metal material) and also has a different bulk density from the other fillers. If the micro-fiber snippets are made of glass fiber material, the micro-fiber snippets have an identical mass density to the solid glass spheres. However, the two fillers differ in terms of their bulk density due to the different shape and geometry, which results in a variance in the mechanical and/or thermal properties between these areas.

Such a sandwich component 10 can also be produced in different ways. 2 shows an embodiment in which initially only the core layer is produced. The core layer is produced in a first process step with the aid of a molding tool 100, which corresponds to the core layer in terms of shape and geometry. For this purpose, based on the embodiment of 1 first three material compositions 17a to 17c provided, which are composed of the support material 15 and the respective filler 16a to 16c. Accordingly, the first filler 16a is contained in the first material composition 17a, while the second filler 16b is provided in the second material composition 17b. Finally, the third filler 16c is contained in the third material composition 17c.

The mold 100 is a closed mold that has an opening 110 for filling in the material compositions. Such an opening 110 can be formed by any type of infusion or injection channel.

First, the first material composition 17a is introduced through the opening 110 into the mold 100, which is deposited in the lower area and thus forms the first core area 14a. By changing the molding tool 100 in relation to the earth plumb bob, it can be achieved that the material composition introduced collects in the lower left or right corner.

Subsequently, the second material composition 17b is introduced, which forms the second core region 14b. Finally, the third material composition 17c is introduced into the cavity 120 of the mold 100 so as to form the third core portion 14c.

If the support material 15 of the material compositions 17a to 17c is a matrix material of a fiber composite material or a thermally activatable plastic, the temperature of the mold 100 can be used to consolidate the support material 15, which firmly embeds the fillers of the respective material composition and thus forms an integral unit.

After the core layer 14 as in 2 was produced separately using a mold 100, the finished core layer 14 is removed from the mold and used for further production of the sandwich component. Two fundamentally different further procedures are possible here. On the one hand, cover layers that have already been produced can be used, between which only the core layer 14 that has been produced is arranged and optionally glued to the cover layers.

Alternatively, however, it is also conceivable that the cover layers are produced together with the core layer that has already been produced in order to form the sandwich component in a second production process. For this purpose, the cover layer material of the cover layers is introduced into a mold, with the already produced core layer 14 being inserted between the cover layer material. The top layer material is then consolidated and the sandwich component is produced in a further process step.

3 shows an integral production of a sandwich component, in which the cover layer material and the core layer are consolidated in a single process step and the sandwich component is thus produced. For this purpose, a cover layer material 18 is first introduced into a mold 100, the mold having a shaping tool surface that corresponds to the shape and geometry of the sandwich component to be produced. This is preferably a closed mold that forms a cavity on the inside.

After the cover layer material 18 has been introduced into the mold and the mold closed, the material compositions 17a to 17c provided are then successively filled into the mold to form the individual core layer regions 14a to 14c and thus occupy the cavity of the mold formed between the cover layers. Subsequently, both the cover layer material and the supporting material of the material compositions 17a to 17c can then be consolidated in a common process step.

In particular when a fiber composite material is used as the cover layer material 18, for example a prepreg as the fiber material, this procedure is particularly advantageous since both the cover layers and the core layer are cured together and a highly integral component is thus formed. If, in addition, a matrix material is also used as the support material, which corresponds to the matrix material of the prepreg or is at least very similar to it, very strong crosslinking occurs at the boundary layer between the cover layers and the core layer, which in particular prevents delamination of the cover layers from the core layer. At the same time, a microscopic as well as macroscopic multi-phase core layer is created, which is adapted to the load requirements in the intended use.

4 shows an embodiment in which the sandwich component is produced by a closed mold 200. Here, too, the mold 200 has a shaping tool surface that corresponds to the shape and geometry of the sandwich component. First, the cover layer material 18 of the lower cover layer is introduced into the mold 200 and then ßend the area of the core layer 14 filled with the fillers 16 without the proppant 15. The support material 15 is located separately outside the mold. The mold is then closed and the top cover layer is formed with the cover layer material 18 .

The fillers 16 are introduced in such a way that different core layer regions are formed. The first filler is introduced in such a way that it forms in the first core layer area, while the second filler is introduced at the point where the second core layer area must be located. In contrast to the previous embodiments, however, no material composition is introduced here, only the respective filler.

The subsequent infusion of the supporting material 15 into the region of the core layer 14 infuses the supporting material 15 into the core layer 14 and thus subsequently forms the fillers already present in the core layer 14 at the respective point in the supporting material 15 . The support material can then subsequently be cured.

It is particularly advantageous if the cover layer material 18 of the cover layers is formed from a fiber material that is also intended to be embedded by the supporting material 15 . Accordingly, the supporting material 15 can be a matrix material of a fiber composite material, which forms both the core layer area and the matrix of the cover layers. Here, too, a highly integral unit is formed between the core layer and the cover layers.

Alternatively, it is conceivable that the matrix material is already contained in the cover layers, since a pre-impregnated prepreg is used as the cover layer material. By applying pressure in the direction of the core layer 14, the matrix material pre-impregnated in the prepregs can then be pressed out in the direction of the core layer 14, as a result of which the core layer 14 is infused through the matrix material of the prepregs. This procedure is particularly well suited for very thin sandwich components, in which both a highly integral component is formed and the system costs can be significantly reduced due to the lack of infusion.

Reference List

10

sandwich component

11

first top layer

12

second top layer

13

edge area

14

core layer

15

support fabric

16

fillers

17

material composition

18

cover material

100

molding tool

110

opening

120

cavity

200

molding tool

Claims (15)

Sandwich component (10) having - a first cover layer (11) made of a cover layer material (18), - at least a second cover layer (12) made of a cover layer material (18) and - an intermediate core layer (14) formed from a core layer material and which on average has a lower bulk density than the cover layer material (18) of the first cover layer (11) and the second cover layer (12), characterized in that - the core layer material of the core layer (14) has a support material (15) made of a solid material and at least one in the support material (15) embedded additional filler (16), - there being provided a filler (16) of a first type and a filler (16) of at least a second type, - wherein the core layer (14) has a first integral portion (14a), in which the core layer material predominantly contains the filler (16, 16a) of the first type, and has at least a second integral region (14b) in which the core layer material predominantly contains the filler ( 16, 16b) of the second type, - wherein the filler (16, 16a) of the first type differs from the filler (16, 16b) of the at least one second type with regard to at least one physical property such that the first integral region (14a ) the core layer (14) has a different mechanical and/or thermal property from the second integral region (14b) of the core layer (14). Sandwich component (10) after claim 1 , characterized in that the fillers (16) are solid microspheres, hollow microspheres and/or microchips. Sandwich component (10) after claim 1 or 2 , characterized in that the fillers (16) contain a glass material, a metal material, a plastic material, carbon fiber material and/or a glass fiber material or are formed from such a material. Sandwich component (10) according to one of the preceding claims, characterized in that at least one cover layer is formed from a fiber composite material as cover layer material (18), the fiber composite material containing a fiber material and a matrix material embedding the fiber material. Sandwich component (10) according to one of the preceding claims, characterized in that the supporting material (15) is a plastic material, in particular a matrix material of a fiber composite material. Sandwich component (10) according to one of the preceding claims, characterized in that the first cover layer (11) and the second cover layer (12) are connected to one another in an edge region (13) of the sandwich component (10). Turbine jet engine for aircraft, characterized in that the turbine jet engine contains at least one sandwich component (10) according to one of the preceding claims. Method for producing a sandwich component (10), which has a first cover layer (11) made of a cover layer material (18), a second cover layer (12) made of a cover layer material (18) and an intermediate core layer (14) formed from a core layer material , which on average has a lower mass density than the cover layer material (18) of the first cover layer (11) and the second cover layer (12), characterized in that - the core layer (14) consists of a support material (15) made of a solid material and at least one additional filler (16) embedded in the support (15) is made using a filler (16) of a first type and a filler (16) of at least a second type, - wherein a first integral portion of the core layer (14) is made wherein the core layer material comprises predominantly the filler (16) of the first type, and a second integral portion of the core layer (14) is made wherein the core layer material v predominantly contains the filler (16) of the second type, such that the filler (16, 16a) of the first type differs from the filler (16, 16b) of at least one second type in at least one physical property such that the first integral Area (14a) of the core layer (14) is given mechanical and/or thermal properties that differ from the second integral area (14b) of the core layer (14). procedure after claim 8 characterized in that a first cover sheet material (17) is provided as part of the core layer material, containing the proppant (15) and the additional filler (16) of the first type, and in that a second material composition (17) is provided as part of the core layer material that contains the supporting material (15) and the additional filler (16) of the second type, wherein - the material compositions (17) are successively introduced into a mold (100) corresponding to the shape and geometry of the core layer (14) in such a way that the first area and the second area of the core layer (14) are formed integrally, - the material compositions (17) introduced into the mold (100) are consolidated and the core layer (14) thus formed in the mold (100) is demoulded from the mold (100). , and - the consolidated core layer (14) for producing the sandwich component (10) is arranged between cover layer material (18) of the cover layers. procedure after claim 9 , characterized in that the cover layer material (18) of the first cover layer (11) is introduced into a mold (100) corresponding to the shape and geometry of the sandwich component (10) and the consolidated core layer (14) is then arranged on the cover layer material (18). and then the cover sheet material (18) of the second cover sheet (12) is applied to the arranged core layer (14). procedure after claim 8 characterized in that a first composition of matter (17) is provided as part of the core layer material containing the proppant (15) and the additional filler (16) of the first type and that a second composition of matter (17) is provided as part of the core layer material that contains the supporting material (15) and the additional filler (16) of the second type, the material compositions (17) being successively formed by the first cover layer material (18) and the second cover layer material (18) to produce the sandwich component (10). Cavity (120) are introduced in such a way that the first region and the second region of the core layer (14) are formed integrally, and wherein the material compositions (17) introduced into the cavity (120) are consolidated to produce the core layer (14). procedure after claim 11 , characterized in that the cover layer material (18) are consolidated together with the material compositions (17) in a common process step. procedure after claim 11 , characterized in that the cover layer material (18) is introduced into a mold (100) corresponding to the shape and geometry of the sandwich component (10) and consolidated in a first process step, so that a cavity (120) forms between the consolidated cover layers, wherein then the material compositions (17) are successively introduced into the cavity (120) formed by the consolidated cover layers and consolidated in a second process step. procedure after claim 8 , characterized in that a dry fiber material of a fiber composite material is introduced as cover layer material (18) into a mold (100) corresponding to the shape and geometry of the sandwich component (10), so that a cavity (120) is formed between the cover layers, into which the filler (16) of the first type and the filler (16) of at least the second type are introduced in such a way that the first area and the second area are formed, with the dry fiber material and the cavity (120) filled with the fillers (16) is then infused and consolidated with a matrix material. procedure after claim 8 , characterized in that a pre-impregnated fiber material of a fiber composite material is introduced as the cover layer material (18) into a mold (100) corresponding to the shape and geometry of the sandwich component (10), so that a cavity (120) is formed between the cover layers into which one after the other the filler (16) of the first type and the filler (16) of at least the second type are introduced in such a way that the first area and the second area are formed, with pressure then being applied to the cover layer material (18) in the direction of the cavity (120). so that the matrix material contained in the pre-impregnated fiber material infuses into the cavity (120) filled with the fillers (16).

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