EP2890851B1 - Adhesive connection for large composite components - Google Patents

Description

The present invention relates to a method for producing an adhesive bond between a lightweight composite component and another component according to the preamble of claim 1 and an apparatus according to the preamble of the independent device claim.

From the prior art it is known to glue components together. Here, in particular in bridge construction, an adhesive, in particular a pasty adhesive or adhesive mortar, on a joint edge of a composite component, as for example in the US 2002/0020033 A1 described, applied. Subsequently, the abutting edge is pressed against another component, wherein the pressing force must be sufficient to ensure that the adhesive comes into contact with the largest possible part of the surfaces. From the CA 2 638 480 A1 the bridge construction is known by assembling several lightweight components. The lightweight components are connected by an adhesive layer with each other, in which case the adhesive is applied to the abutting edges of the respective components (see page 10, line 4).

When pressing on the one hand, especially when insufficient contact pressure, air pockets are easily included in the adhesive, whereby the stability and durability of the adhesive joint is weakened overall and the risk of cracking is increased. On the other hand, by pressing, in particular with a large contact force, adhesive displaced from the splice to the outside, causing them can enter the environment uncontrollably, for example, in bridge construction can get into an underflowing river what especially when using potentially toxic and / or irritating substances.

From the EP 0 603 060 A1 is a non-specialist joining technology for the production of a concrete bridge is known, with which heavy-weight bridge elements are fixed together.

From the US 6,588,160 B1 For example, a method of bonding composite materials together by means of an adhesive is known, wherein the faces of the components are manually painted by means of the high-viscosity adhesive and then the components are subjected to force relative to each other.

The object of the present invention is to provide a method and a device which do not have the above-described disadvantages, in particular in which a stronger and stronger adhesive bond is achieved.

This object is achieved by a method having the features of claim 1 and by a device having the features of the independent device claim. Advantageous developments of the invention are described in the subclaims.

In order to avoid repetition, features disclosed in accordance with the invention should be disclosed and claimed as being in accordance with the method, and features disclosed according to the method should be disclosed as being in accordance with the device and be able to be claimed.

In a method according to the invention is a lightweight composite component, in particular a sandwich component as it is known from US 2002/0020033 A1 is known, comprising a core layer and two outer layers bonded to another component by an adhesive. For this purpose, the components to be bonded are positioned prior to bonding to each other so that a gap is formed between them, wherein the gap preferably includes portions which are associated with the cover layers, and at least one portion which is associated with the core layer.

The components need not necessarily be uniformly spaced to form the gap, but for example, to compensate for tolerances in a range also be closer to each other. For a simple visual check, care should be taken to ensure that a minimum gap thickness of about 1 mm remains.

The gap is then sealed at the edge by sealing means which differ from the adhesive in at least one material parameter, in particular the viscosity, the sealing means including a filling volume together with one joining surface of the respective components. Subsequently, preferably after a curing of the sealing means, this filling volume is filled up with an adhesive, wherein the adhesive has to be flowable in order to be suitable for filling, preferably a viscosity in the range of 1-30,000 mPas, more preferably in a range between 1 - 10000 mPas, more preferably in a range between 1-5000 mPas, particularly preferably in a range of 1-3000 mPas. The viscosity must be present in the corresponding outside temperature range at which the components are bonded, in particular at a temperature in the range from 0 ° C to 45 ° C, preferably in the range from 15 ° C to 30 ° C, particularly preferably at a temperature of 20 ° C.

The process according to the invention has a multiplicity of advantages over the processes known from the prior art.

Thus, it is made possible by the sealing means according to the invention in the first place to use adhesive bonding by filling, which brings a better surface bonding by the adhesive, which has a lower viscosity than the sealant, by its fluidity a large-area wetting in direct contact between the components and the adhesive. This also counteracts trapped air, which have proven to be a common fault of highly loaded adhesive joints.

Without the sealant the use of appropriate adhesive would not be possible because they would flow independently from the splice.

Also, in the method according to the invention, it is not necessary to apply an external contact force to the components during bonding. Especially with lightweight composite components often lacking the necessary weight to apply the required in the prior art contact pressure without external means. In a method according to the invention, however, the adhesive passes through the padding even without this contact force over a large area in contact with the joining surfaces.

In addition, a method according to the invention has the advantage that the components can be positioned or aligned "dry", that is to say without applied adhesives, whereby misalignments can be corrected even more easily and / or have less pronounced effects, whereas in "wet" positioning, which is very difficult and with great effort to accomplish, displaced by misalignments, for example, the majority of the adhesive displaced from the splice and / or can be distributed unevenly.

Also, adhesives may be used in the method according to the invention, the use of which would not be possible in the known method. Thus, the sealing means can be designed for effective protection against stresses such as UV radiation and / or corrosion, so that the internal adhesive can be less resistant to these stresses, in particular in favor of a stronger adhesive effect. Also, a rapid curing of the adhesive is not absolutely necessary, since they are held by the sealing means stationary in the filling volume.

In order to ensure the protection of the internal adhesive, the sealing means preferably have a peripheral thickness (ie distance of a filling volume limiting surface of the sealing means to an outer surface of the sealing means) between 0.5 and 5 cm, more preferably between about 1 and 2 cm on.

Preferably, the components are positioned so that the gap has a width of up to 2 cm, preferably of up to 1 cm, more preferably of about 0.5 cm, but at least 0.1 cm, in particular defined by the maximum distance of the joining surfaces in Filling volume has. To secure a given positioning or gap width spacer elements, either as separate elements or as part of the components, are used, which lie positively against both components to be bonded.

The method described is particularly suitable for use in the manufacture of adhesive bonds in bridge construction with lightweight composite parts, in particular for the production of adhesive bonds between a plurality of lightweight composite parts, each having a core layer and two cover layers, in the form of a composite sandwich decks, in which case the cover layers of the two components are glued together and the core layers of the two components, and / or between such a lightweight composite part and a support element such as a pillar and / or support, in particular steel, wood or concrete. In this application, the adhesive bond between the individual components are heavily loaded and require a secure and durable adhesive bond, which can be ensured by a method according to the invention.

Preferably, the cover layers are each arranged on two opposite sides of the core material, more preferably, the cover layers envelop the core material as a continuous layer on the entire surface.

At least one of the cover layers is preferably formed in the sandwich construction for receiving the bending moments and the expansion forces in the plate plane.

The core material is designed in particular to absorb forces transversely to the cover layer, so it preferably absorbs the thrust forces or the local pressure forces.

The adhesive bond of the present invention now bonds the cover layers together so that the bending and stretching stress is preferably transferred fully from the cover layer of one plate to the cover layer of the adjacent plate. At the same time, the adhesive bond preferably also transfers the transverse forces in the core completely from one plate to the other plate.

As a core material in the sandwich of a lightweight core material is advantageously used, but which has sufficient compressive and shear strength to to absorb the mentioned loads of pedestrian and road bridges. Preference is given to using wood, with a density of less than 600 kg / m3, or a polymer foam, which is reinforced if necessary with fiber composite webs. Particularly preferred balsa wood, with a density less than or equal to 300 kg / m ³ , in particular between 200 and 300 kg / m ³ . Such a balsa wood core represents a particularly good compromise between weight and load capacity. Fibers of the balsa wood are preferably oriented transversely to the surface of the cover layer (for example, in the case of bridges in an approximately vertical direction).

In particular, the use of fiber composite material, in particular with tissue or scrim of glass, carbon, basalt and / or natural fibers, wherein the largest proportion of the fibers is preferably oriented in the main support direction of the sandwich panel to the optimum structural behavior or to obtain the optimum stiffness of the sandwich component.

The sandwich components can be manufactured to have the typical surface loads of at least 4 kN / m ² for personal loads, preferably the typical punctual loads (wheel loads) for vehicles of at least 40 t, preferably at least 60 t, more preferably at least 100 t, more preferably above 100 t, and / or wheel loads of at least 700 daN, 1000 daN, 2000 daN, 3000 daN, 4000 daN, 5000 daN and / or 10000 daN, especially on a load bearing area of 200 x 200 mm record. Sandwich components produced in this way preferably have a bending stiffness between 100 kNm2 / m and 50,000 kNm2 / m (in each case based on width). These values make it possible, in particular for bridge construction, to load persons and / or vehicles.

The cover layers may be multi-layered and / or additional layers may be provided which are applied to the cover layers before or after bonding. In particular, a plurality of functional layers, for example protective layers to increase the durability, may be provided on the lightweight composite component.

Furthermore, it has proven to be advantageous for the joining surfaces (or the gap) in the region assigned to the cover layers to be in a direction which is not at right angles to the surface of the cover layers (and preferably also not parallel), in particular in a gradient, ie Ratio of height extension to horizontal extent, of 1:10 (in particular thickness based on adhesive flange length) °, preferably less than 1:20, extends. By this Schäftung the surface of the cover layers associated region of the adhesive is increased, whereby the surface load of the adhesive bond is reduced (at the same load) in this area. For example, with fiber-based cover layers, in particular fiberglass base, the joining surfaces in the region of the cover layers are preferably staggered, in which the length of the fibers is extended depending on the fiber layer or shortened accordingly on the opposite joining surface, preferably shortened by 10 to 30 mm per layer , particularly preferably shortened by about 20 mm, formed.

The surface of the two joining surfaces in the region of the cover layer is preferably at least 10 mm ² per 1 mm ² cross section of the cover layer, but preferably 20 mm ² per 1 mm ² cross section of the cover layer.

The surface of the surfaces to be bonded is preferably pretreated for bonding, in particular cleaned and prepared. This can be performed by grinding and cleaning the adhesive surface, which is generally known, immediately before bonding.

However, the pretreatment does not have to be performed immediately before bonding. Between pretreatment and bonding, the surface of the units to be bonded is then preferably protected by protective means, for example a commercially available tear-off fabric made of polyester or nylon, which is removed (preferably before cure). This has the advantage that the surfaces can be pretreated in a significantly more efficient and qualitatively better manner than would be possible on site (in particular in bridge construction). As a result, it is possible in particular to obtain a surface which is protected for transport and roughened uniformly for bonding and which is completely clean, immediately prior to bonding.

In the region, which is assigned to the core layer, the joining surfaces preferably extend substantially perpendicular to the surface of the cover layers. Since no contact pressure as in the conventional adhesive method is necessary by the present invention, this joining surface can be made vertically and therefore cost.

Particularly preferred is the use of a total in cross-section substantially Z-shaped gap, which have made in the field of lightweight composite parts found to be particularly suitable. The joining surfaces in the section assigned to the core layer are here preferably oriented at an angle greater than 45 ° to the surface of the cover layer, particularly preferably substantially perpendicular to the surface of the cover layer. However, in principle, other forms are possible, depending on design and manufacturing requirements. In particular, the joining surfaces can be removed in one or both components and replaced by a loose adherend, which in each case has the same oblique cross-sectional shape towards both components. The tensile and compressive forces in the top layer level are thus transferred by the bonding of the one cover layer on the separate wing part to the other cover layer.

In accordance with a further embodiment, it has been found that, when using translucent cover layers, a visual inspection of the refilling process, in particular with regard to (unlikely but possible) air pockets at the upper end of the filling volume, can be achieved. For this purpose, the cover layer, in particular in the upper 3-5 mm of the cover layer below the surface, preferably an opacity, which is naturally given, for example, in glass fiber reinforced cover layers.

The sealing means differ in at least one parameter from the adhesives, preferably they have a significantly higher viscosity than these. In particular, the viscosity is high enough that the gap-applied sealing means for gap widths up to 4 cm are self-retaining until hardening. Additionally or alternatively, they may have a higher gas and / or Flüssigkeitsdurchtrittssperrwirkung, higher UV absorption and / or different hardness and / or elasticity than the adhesive to fill the filling volume. The sealants preferably cure in less than 30 minutes. However, the curing time can also be significantly higher if this operation is not time-critical.

As a sealant may also be an adhesive used, for example, a solvent-free, thioxotropic 2-component mortar based on epoxy resin used. Such adhesives may have a different chemical composition than the actual adhesive, or they may be filled with mineral elements, or Color pigments contain, with the aim of ensuring the best possible protection of the internal adhesive against external influences. Preferably, the filling volume is filled with the adhesive after curing of the sealing means. The sealing means are preferably pasty and / or spreadable when applied.

As a suitable sealant, for example, the product marketed by Sika Schweiz AG as Sikadur 30 has been found.

Alternatively or additionally, the sealing means may again comprise removable members from the components or the adhesive bond, such as a very adhesive tape, which can be removed quickly and completely after curing of the adhesive.

Preferably, an air outlet is provided on the upper side, preferably at the highest point, of the filling volume. As a result, when filling the filling volume with the adhesive air can easily escape from the filling volume, so that air inclusions is counteracted. In addition, if the filling process is assisted with vacuum, the air can be sucked out of the adhesive gap at this point. Particularly preferably, the adhesive is introduced from an underside, preferably the lowest point, of the filling volume through an adhesive inlet into the filling volume during filling, since the increasing filling level ensures the most uniform possible air displacement and a homogeneous distribution of the adhesive in the filling volume.

To fill the gap with the adhesive, the use of overpressure in the adhesive or pumps is particularly suitable since this makes it possible to achieve uniform filling, in particular also against the force of gravity. The pumping power is to be chosen so that the Adhesive amount can be injected into the adhesive gap within the open time of the selected adhesive system.

Alternatively or additionally, a simple and easy-to-handle filling process can also be carried out via a static overpressure, by means of an adhesive container attached to a corresponding elevated height.

Air outlet and adhesive inlet can be formed for example by a tube or a hose which penetrates the sealing means, wherein the sealing means except for the air outlet and adhesive inlet (together with the joining surfaces) preferably peripherally closed the fill volume include.

After the adhesive has been filled and / or cured, the adhesive inlet and / or air outlet may be removed and the site sealed with the same sealant.

The adhesive is preferably a reaction adhesive, in particular a multi-component adhesive such as a two-component adhesive. The use of adhesives based on epoxy resin with high mechanical strengths, such as, for example, the product marketed by Sika Schweiz AG as Sikadur 300, has proven particularly advantageous, although other structural adhesive systems based on acrylic or polyester can also be used.

The adhesive, in particular during filling, preferably has a density of between 0.9 g / cm ³ and 1.8 g / cm ³ , preferably between 0.9 g / cm ³ and 1.4 g / cm ³

Preferably, the adhesive, in particular when filling, anhydrous. As a result, interactions with the parts to be joined are avoided.

In order to ensure a good wetting of the joining partners by the adhesive, it has been found to be advantageous that the adhesive no solid particles such as rock grains with a size of about 2 mm, preferably no solid particles with a size of about 1 mm, particularly preferably no solid particles with a size of about 0.5 mm. In particular, the adhesive is preferably free of cement, concrete and / or sand.

The thickness of the composite part, ie its extent in a direction perpendicular to the surface of at least the cover layers, for example in a bridge component in the vertical direction, is preferably between 50 and 500 mm, wherein the thickness of the sandwich component is dependent on the load and the span. A cost-effective solution is often a combination of steel or concrete beams that have the necessary static height to which the sandwich panel is structurally bonded, comparable to conventional constructions in concrete. Thus, the sandwich panel can be used in the preferred range given above for in principle all types of bridges. The width extension, for example in the case of a bridge component in the direction of the width of a roadway, is preferably between 1 and 12 m and its longitudinal extent, for example in the case of a bridge component in the direction of the roadway, is preferably between 3 and 12 m. Basically, the dimensions of the components are completely flexible, the limitation is given exclusively by logistical constraints such as portability.

The joining surfaces extend at least in sections, preferably completely, at an angle, in particular at right angles, to at least one of the cover layers.

The cover layers preferably have a thickness (in particular measured from the core layer to the surface) of between 5 and 30 mm, more preferably between 5 and 20 mm. The core layer preferably has a thickness (in particular measured as the distance between the cover layers) of between 40 and 500 mm.

The adhesive bond can additionally be mechanically strengthened, in particular screwed and / or riveted.

In the event that the other component is also a lightweight composite part, all the features disclosed for the (first) lightweight composite part should also apply as disclosed for the other component.

The present invention is particularly suitable for the production of adhesive bond in the manufacture of a bridge, in particular a bridge of the bridge class 3/3, 6/6, 9/9, 12/12, 16/16, 30/30 and / or 60/30 According to DIN 1072. Here, for the manufacture of a bridge deck in the manner of the invention adhesive bonds between a plurality of lightweight composite parts, which form as bridge deck elements the road and / or walking area, preferably at least four lightweight composite parts manufactured. The lightweight composite parts are further preferably connected to a common carrier element, in particular steel and / or concrete beams, or in each case with a single carrier elements via adhesive bonds produced in accordance with the invention.

In order to allow a particularly lightweight construction and thus a low carrier load, the lightweight composite parts are preferably metal-free, especially steel-free. In particular, the adhesive is preferably chosen so that the gap does not have to have steel reinforcements.

Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawings.

Fig. 1

eine schematische Darstellung eines Brückendecks hergestellt durch Verwendung eines erfindungsgemäßen Verfahrens in einer Draufsicht,

Fig. 2

eine Anwendung eines Ausführungsbeispiels eines erfindungsgemäßen Verfahrens in einem ersten Schritt einer perspektivischen Ansicht,

Fig. 3a

ein zweiter Schritt des Verfahrens in einer perspektivischen Ansicht,

Fig. 3b

eine Schnittansicht (A-A) zu Fig. 2a,

Fig. 4a

ein dritter Schritt des Verfahrens in einer perspektivischen Ansicht,

Fig. 4b

eine Schnittansicht (B-B) zu Fig. 3a, und

Fig. 5

eine Schnittansicht einer durch ein erfindungsgemäßes Verfahren hergestellten Klebeverbindung zwischen einem Leichtbau-Verbundbauteil und einem Stahlträger.

These show in:

Fig. 1

a schematic representation of a bridge deck made by using a method according to the invention in a plan view,

Fig. 2

an application of an embodiment of a method according to the invention in a first step of a perspective view,

Fig. 3a

a second step of the method in a perspective view,

Fig. 3b

a sectional view (AA) to Fig. 2a .

Fig. 4a

a third step of the method in a perspective view,

Fig. 4b

a sectional view (BB) to Fig. 3a , and

Fig. 5

a sectional view of an adhesive bond produced by a method according to the invention between a lightweight composite component and a steel beam.

Fig. 1 shows a bridge deck 22, in which a plurality of adhesive bonds were prepared by a method according to the invention.

The bridge deck 22 comprises a plurality (here schematically illustrated as four) of lightweight composite parts 10, which are connected in series in each case by adhesive bonds according to the invention with each other. These adhesive joints between the lightweight composite parts 10 may, for example, after the in the FIGS. 2 to 4b 1 and described below, wherein a fill volume 70 between the lightweight composite parts is filled with a low viscosity adhesive 80.

In addition, the lightweight composite parts 10 are each connected to at least one support member 22 (shown schematically as two common support elements), such as steel beams, by adhesive bonds according to the invention. The adhesive bonds between the lightweight composite parts and the support elements may, for example, as in Fig. 5 be formed represented.

Fig. 2 shows an application of an embodiment of a method according to the invention for adhesively bonding a lightweight composite component 10 comprising a core layer 12 made of a balsa with a density of 200 to 250 kg / m ³ and two cover layers 14 and 16, here formed by a bridge deck member in the form of a sandwich -Bauteils, with another component 30, here also formed by a bridge deck member in the form of a Sandwich component, with a core layer 32 and two cover layers 34 and 36, in a first step.

In Fig. 2 For example, the components 10 and 30 have been positioned relative to one another in such a way that they form a gap 50 between two respective joining surfaces 18 and 38 which has a substantially Z-shaped cross section. The gap width is determined here by a spacer element 52. Except for the spacer element 52, the gap 50 is completely filled with air in this state.

The components 10 and 30 were preferably pretreated by cleaning and surface roughening prior to transport to the joint location. After the pretreatment, a tear-off fabric (not shown) was attached to the joining surfaces 18 and 38, protecting the joining surfaces 18 and 38 during transport. This tear-off fabric was removed before positioning. As a result of these measures, a high-quality pretreated, and thus readily bondable, joining surface 18 or 38 was ensured.

Fig. 3a shows the application of the method Fig. 2 in a second step in a perspective view. The sectional view to the section AA is shown enlarged in Fig. 2b.

In the Fig. 3a and 3b the gap 50 is sealed at the edge by sealing means 60, for example of the type Sikadur 30. The sealing means 50 define together with the joining surfaces 18 and 38 of the components 10 and 30, a filling volume 70, wherein at the bottom 71 of the filling volume 70 an adhesive center inlet 72 in the form of an inlet tube and at the top 73 of the filling volume an air outlet 74 in the form of an outlet tube are arranged.

As in Fig. 4a and 4b 2, after filling, the fill volume 70 is filled with an adhesive 80, such as the Sikadur 300, through the adhesive inlet 72, with the displaced air exiting the air outlet 74.

Due to the low viscosity of the adhesive of less than 1000 mPas, the adhesive 80 completely fills the filling volume 70 and comes in contact with the entire surface of the filling volume 70 bounding joining surfaces 18 and 38, resulting in a particularly strong and resilient adhesive bond.

Fig. 5 shows an adhesive bond obtained by a further embodiment of a method according to the invention for adhesively bonding a lightweight composite component 10 comprising a core layer 12 made of a balsa wood with a density of 200 to 300 kg / m ³ and two cover layers 14 and 16, here formed by a bridge deck member in Shape of a sandwich component, with another component 30, here also formed by a steel beam.

Between the lightweight composite part 10 and the other component 30, a filling volume 70 is sealed at the edge with sealing means 60 and filled with an adhesive 80, which differs in its viscosity from the sealing means 80.

reference numeral

10

Lightweight composite part

12

Core layer of the lightweight composite part

14

first cover layer of the lightweight composite part

16

second cover layer of the lightweight composite part

18

Joining surface of the lightweight composite part

20

bridge deck

22

support element

30

another component

32

Core layer of the further component

34

first cover layer of another component

36

second cover layer of the further component

38

Joining surface of the other component

50

gap

52

spacer

60

sealing

70

Filling volume

71

Bottom of the filling volume

72

Adhesive inlet

73

Top of the filling volume

74

air outlet

80

adhesive

Claims (15)

1. Method of adhesively connecting a lightweight composite component (10), preferably a bridge element, more particularly an element forming a roadway and/or a footpath, comprising a core layer (12) and two cover layers (14, 16) with a further component (30), comprising the steps:

   - positioning the composite component (10) and the further component (30) in relation to each other

   - adhering the composite component (10) and the further component (30) to each other at joint surfaces (18, 38) of each of the components (10, 30), with an adhesive (80) in the form of a multi-component reaction adhesive, more particularly on an epoxide, acryl, polyurethane or polyester basis,
   characterised in that

   - during positioning, the composite component (10) and the further component (30) are positioned with regard to each other in such a way that a gap (50) is formed between them,

   - along the edges, the gap (50) is sealed with sealing means (60) which are different in terms of at least one material parameter, more particularly the viscosity, from the adhesive (80), wherein through the sealing means (60) and the joint surfaces (18, 38) of each of components (10, 30), a filling volume (70) is defined,

   - adhesion takes place through filling of the filling volume (70) with the adhesive (80) in a flowing manner,

   - the adhesive (80) is of low viscosity with a viscosity in the range 1 - 30000 mPas in a temperature range from 0°C to 45°C, preferably in the range from 15°C to 30°C, particularly preferably at a temperature of 20°C.
2. Method according to claim 1 characterised in that the adhesive (80) is of low viscosity with a viscosity in the range of 1 - 10000 mPas, preferably in the range of 1 - 5000 mPas, particularly preferably in a range of 1 - 3000 mPas, more particularly at a temperature in a range from 0°C to 45°C, preferably in the range from 15°C to 30°C, particularly preferably at a temperature of 20°C.
3. Method according to any one of claims 1 or 2 characterised in that the sealing means (60) comprises a paste-like adhesive, more particularly a solvent-free, epoxy resin-based thioxotropic 2-component adhesive and/or an adhesive tape.
4. Method according to any one of claims 1 to 3 characterised in that during sealing the gap (50) is circumferentially sealed along the edge by the sealing means (60) except for an adhesive inlet (72) and an air outlet (74) formed jointly with or separately from the adhesive inlet (72).
5. Method according to any one of claims 1 to 4 characterised in that the adhesive inlet (72) and/or the air outlet (74) are arranged on opposite sides of the lightweight composite component (10) and/or in that the adhesive inlet (72) is assigned to an underside (71) of the filling volume (70) and the air outlet (74) to an upper side (73) of the filling volume (70).
6. Method according to any one of claims 1 to 5 characterised in that the further component (30) is a lightweight composite component, preferably a bridge element, more particularly an element forming a roadway and/or a footpath comprising a core layer (32) and two cover layers (34, 36) and/or a steal, concrete and/or timber beam.
7. Method according to any one of claims 1 to 6 characterised in that the joint surfaces (18, 38) extend in a section assigned to one of the cover layers (14, 16; 34, 36) at an incline of 1:10, preferably 1:20 with regard to the surface of the cover layer (14, 16; 34, 36).
8. Method according to any one of claims 1 to 7 characterised in that the filling volume (70) essentially has a Z-shaped cross-section, wherein the joint surfaces (18, 38) in the section assigned to the core layer (12; 32) are preferably aligned at an angle of more than 45° to the surface of the cover layer (14, 16; 36, 38), particularly preferably extend perpendicularly to the surface of the cover layer (14, 16; 36, 38).
9. Method according to any one of claims 1 to 8 characterised in that the core layer (12; 32) is made of a lightweight material, more particularly wood, preferably balsa wood with a density of 200 - 300 kg/m³, also preferably with a fibre orientation which is aligned at angle between 45° and 90° to the surface of the cover layer (14, 16; 34, 36), particularly preferably 90°.
10. Method according to any one of claims 1 to 9 characterised in that at least one of the cover layers (14, 16; 34, 26) has fibres, more particularly glass fibres, carbon fibres, basalt fibres and/or natural fibres which preferably extend in parallel to the surface of the cover layers (14, 16; 34, 26).
11. Method according to any one of claims 1 to 10 characterised in that at least one of the cover layers (14, 16; 34, 26) is designed for area loads of at least 4 kN/m² for person loads or for point wheel loads of vehicles up to 40 t, preferably up to 60 t, particularly preferably up to 100 t, even more preferably over 100 t.
12. Method according to any one of the preceding claims characterised in that the joint surfaces are pretreated, more particularly cleaned and/or roughened, wherein after the pre-treatment, protection means, more particularly a peel ply, are applied to the joint surface which can be removed again before adhesion.
13. Method according to any one of the preceding claims characterised in that during filling, the adhesive (80) is injected by excess pressure into the gap and/or is pumped into the gap by pumping means.
14. Device obtained by a method according to any one of the preceding claims with a lightweight composite component (10) and a further component (30),
    characterised in that
    an adhesive connection between the lightweight composite material (10) and the further component (30) is provided which has been produced through the filling, in a flowing manner, of a filling volume (70), delimited to the outside by sealing means (60), with a low-viscosity adhesive (80) in the form of a multi-component reaction adhesive with a viscosity at a temperature between 0°C and 45°C in the range of 1 - 30000 mPas.
15. Device according to claim 14 characterised in that enclosed in the filling volume (70) is the adhesive (80) which differs in terms of at least one material parameter from the sealing means (60).

Images