Component composite

Abstract

The invention relates to a component assembly (10) comprising a first component (12) with a first joining surface (18) and a second component (14) with a second joining surface (20), and comprising an adhesive tape (25) with an adhesive layer (26) which connects the two components (12, 14) to one another in the region of their joining surfaces (18, 20), barb elements (32; 32a to 32d) being embedded in the adhesive layer (26).

Description

Technical area

[0001] The invention relates to a component assembly in which two components are bonded together in the area of ​​joining surfaces by means of a double-sided adhesive tape. The component assembly according to the invention is characterized by improved mechanical properties in the area of ​​the adhesive bond. State of the art

[0002] DE 2013 202 898 A1, filed by the applicant, discloses a component assembly comprising two components that are connected to each other in the area of ​​their two joining surfaces using a double-sided adhesive tape. The cited document further mentions that the adhesive tape can be designed as an electrically conductive adhesive, thereby providing the two components with the same electrical potential. In the known component assembly, a circuit carrier of a pressure sensor is connected to a housing part. Further details regarding the specific design or construction of the double-sided adhesive tape are not provided in the cited document.

[0003] Double-sided adhesive tapes are known from the prior art, which have a carrier layer coated on both sides with an adhesive layer. In addition, double-sided adhesive tapes in the form of so-called transfer adhesive tapes are known, which have only a single adhesive layer. The adhesive layer is provided with a removable protective layer on at least one side for handling and storing the adhesive tape. Disclosure of the invention

[0004] The component assembly according to the invention with the features of claim 1 has the advantage that, in conjunction with the use of so-called transfer adhesive tapes, it enables a reduction in the creep behavior of the adhesive tape. Furthermore, an improvement in shear strength is achieved. Furthermore, the adhesive tape according to the invention can be used to adjust the adhesive gap and to provide overload protection for the adhesive tape, limiting compressive forces acting on the adhesive tape that are perpendicular to the plane of the adhesive tape.

[0005] The invention is based on the idea of ​​arranging barb elements in the material of the adhesive layer of the adhesive tape, which barb elements bridge the gap between the two joining surfaces of the two components to be joined during the formation of the component assembly and are arranged in contact with the joining surfaces of the components and can mechanically claw into the joining surfaces, in particular can claw into both joining surfaces. This has the consequence that heavy loads introduced into the components, which run parallel to the plane of the joining surfaces, do not have to be absorbed exclusively by the material of the adhesive layer, but can be introduced into the components via the barb elements. In particular, the material of the barb elements is different from the material of the joining surfaces and / or the barb elements do not have a material connection to the material of the joining surfaces.

[0006] Against the background of the above explanations, a component assembly according to the invention with the features of claim 1 therefore comprises a first component with a first joining surface. Furthermore, a second component with a second joining surface is provided, as well as a double-sided adhesive tape with an adhesive layer, wherein the adhesive layer connects the two components to one another in the region of their joining surfaces. According to the invention, barb elements are embedded in the adhesive layer and are arranged in contact with at least one of the joining surfaces.

[0007] In the context of the invention, a double-sided adhesive tape is understood in particular to mean a transfer adhesive tape consisting of an adhesive layer, wherein the adhesive tape is stored or wound up in roll form. The adhesive layer is covered on at least one side by a peelable strip that arises as waste during the formation of the component assembly. Such an adhesive tape is applied in such a way that the adhesive tape is unrolled from the roll and applied with the (adhesive) underside of the adhesive tape to the first joining surface of the first component. Subsequently, the said strip is peeled off the upper side of the adhesive layer and the second component is brought into contact with the adhesive layer with the second joining surface and pressed against the adhesive layer. By pressing the two components against one another, the barb elements come into contact with the joining surfaces of the components.However, the invention is not intended to be limited to the aforementioned transfer adhesive tapes. Rather, the invention can also be implemented on adhesive tapes that have a carrier layer provided with an adhesive layer on both sides.

[0008] Advantageous further developments of the component assembly according to the invention are listed in the subclaims.

[0009] It is particularly advantageous if the barb elements are in contact with both joining surfaces of the components simultaneously. This allows the barb elements to bridge the adhesive gap or serve to adjust the adhesive gap. Particularly in conjunction with barb elements that are harder than the joining surfaces, the barb elements grip the contact surfaces. This results in particularly advantageous mechanical effects, in particular an increase in the shear strength of the adhesive tape and thus also of the component bond.

[0010] In a first refinement of the component assembly described so far, it can be provided that the barb elements are made of an electrically non-conductive material. This is particularly necessary when the two components are connected to different electrical potentials. Alternatively, however, it is also possible for the barb elements to be made of an electrically conductive material. In addition to the possibility of electrical conductivity to one of the two components or the possibility of placing the two components at the same electrical potential, the adhesive tape can also be provided in this case to form or improve the EMC properties of the component assembly, which can be used advantageously in particular in connection with electromagnetically shielding housing components of a control unit.

[0011] There are various options regarding the design of the barb elements and their material, depending on the application and the nature of the components in the joining area. The barb elements are preferably made of steel, titanium, carbide, ceramic, mechanical glass, PCD materials, CBN materials, or a mixture of such materials.

[0012] Furthermore, it is particularly preferred for gap adjustment and for the possibility of the barb elements hooking simultaneously with the two joining surfaces if the barb elements are arranged in the form of a single barb layer with lateral distances or gaps between the barb elements in the adhesive layer of the adhesive tape.

[0013] It can also be advantageous if the barb elements have a regular shape. This results in the adhesive tape having the same material properties or mechanical properties in all directions. This is particularly useful when the barb elements cannot be arranged with a specific orientation in the adhesive layer. For example, the barb elements are designed in the shape of a star, in particular a six-pointed star, and / or a polyhedron, in particular a tetrahedron and / or an octahedron and / or a decahedron and / or a dodecahedron, and / or an arrow, in particular a barbed arrow.

[0014] Preferred is an application in which the component assembly forms a housing or the components of the component assembly are components of a housing.

[0015] Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments of the invention and from the drawings. Short description of the drawings Fig. 1 shows a component assembly in a perspective view, Fig. 2 an adhesive tape stored in the form of an adhesive tape roll in a perspective view, Fig. 3 a partially sectioned view of the adhesive tape according to Fig. 2 in a perspective view, Fig. 4 and Fig. 5 a component assembly before and after the joining process in simplified representations and Fig. 6 to Fig. 9 perspective views of differently formed barb elements. Embodiments of the invention

[0016] Identical elements or elements with the same function are provided with the same reference numbers in the figures.

[0017] In the Fig. 1 shows a component assembly 10 consisting of a first component 12 and a second component 14. In the illustrated embodiment, the two components 12, 14 of the component assembly 10 are designed as housing components and form a housing 16 of a control unit 100. The first component 12 forms a trough-shaped body which, together with the second component 14 forming a housing cover, delimits an interior of the housing 16 in which electrical or electronic components to be protected, in particular against the ingress of media, are arranged. The connection between the two components 12, 14 takes place in the region of two oppositely arranged joining surfaces 18, 20 ( Fig. 4, Fig. 5) of the two components 12, 14 using a double-sided adhesive tape 25.

[0018] In the illustrated embodiment, the joining surfaces 18, 20 are each designed as flat joining surfaces 18, 20, ie the parting plane between the two components 12, 14 also forms a plane.

[0019] According to the presentation of the Fig. 2 and Fig. 3, the adhesive tape 25 has an adhesive layer 26 with a layer thickness d between 200 µm and 1.5 mm. The adhesive layer 26 is covered on one side by a so-called release liner tape 28, which can be removed from the adhesive layer 26 without leaving any residue in order to remove the adhesive tape 25 according to the Fig. 2 in the form of an adhesive tape roll 30.

[0020] According to the invention, it is provided that barb elements 32 are arranged in the material of the adhesive layer 26. The barb elements 32 have an extension or height in a direction perpendicular to the plane of the adhesive layer 26, which is preferably only slightly smaller than the layer thickness d of the adhesive layer 26, wherein it is also preferably provided that the barb elements 32 are still located below the two opposite surfaces 34, 36 of the adhesive layer 26 in a state in which the component assembly 10 has not yet been joined ( Fig. 3, Fig. 4).

[0021] As shown by the Fig. 3 to 5, the barb elements 32 arranged in the form of a single layer in the adhesive tape 26 have gaps 38 or distances from one another in the plane of the adhesive layer 26 in the lateral direction, ie the barb elements 32 are not arranged in direct contact with one another.

[0022] The barb elements 32 are preferably made of a material that has a greater hardness than the material of the two components 12, 14 in the region of their joining surfaces 18, 20. Furthermore, the barb elements 32 are preferably shaped in a square or angular manner to allow the barb elements 32 to dig into or press into the joining surfaces 18, 20 of the two components 12, 14. As a result, the barb elements 32 are arranged in direct, force-fitting contact with the joining surfaces 18, 20. Preferably, at least some of the barb elements 32, preferably as many barb elements 32 as possible, are in direct contact with both the joining surface 18 and the joining surface 20. This can be achieved by a correspondingly large joining force F when connecting the two components 12, 14, wherein the barb elements 32 pierce the surfaces 34, 36 of the adhesive layer 26.

[0023] To form the component assembly 10, according to the Fig. 4 In a first step, the adhesive tape 25 is unwound from the adhesive tape roll 30 and applied to the joining surface 18 of the first component 12. Subsequently, the release liner tape 28 is removed or peeled off. Subsequently, according to the Fig. 5 joining the second component 14 with its joining surface 20 against the adhesive layer 26 and applying a joining force F perpendicular to the plane of the two joining surfaces 18, 20. As a result, the adhesive layer 26 is compressed and the layer thickness d is reduced, preferably in such a way that the barb elements 32 dig into the joining surfaces 18, 20.

[0024] In the Fig.6 to 9 show differently designed barb elements 32a to 32d. In particular, it can be seen that the barb elements 32a and 32d have a regular shape in all spatial directions, meaning that the same material properties of the adhesive layer 26 can be achieved in all spatial directions. In contrast, the barb elements 32b and 32c have different geometries in different spatial directions. This allows the mechanical properties of the adhesive layer 26 to be adjusted in different directions.

[0025] The component assembly 10 described so far can be modified or altered in a variety of ways without deviating from the inventive concept. In particular, the invention is not intended to be limited to the use of housing components. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 2013 202 898 A1

[0002]

Claims

[1] Component assembly (10) comprising a first component (12) with a first joining surface (18) and a second component (14) with a second joining surface (20), and comprising an adhesive tape (25) with an adhesive layer (26) which connects the two components (12, 14) to one another in the region of their joining surfaces (18, 20), wherein barb elements (32; 32a to 32d) are embedded in the adhesive layer (26) and are arranged in contact with at least one of the joining surfaces (18, 20). [2] Component assembly according to claim 1, characterized by that the barb elements (32; 32a to 32d) are arranged in contact with both joining surfaces (18, 20) at the same time. [3] Component assembly according to claim 1 or 2, characterized by that the barb elements (32; 32a to 32d) consist of a material which has a greater hardness than the material of the components (12, 14) in the region of the joining surfaces (18, 20). [4] Component assembly according to one of claims 1 to 3, characterized bythat the barb elements (32; 32a to 32d) are formed from an electrically non-conductive material. [5] Component assembly according to one of claims 1 to 3, characterized by that the barb elements (32; 32a to 32d) are formed from an electrically conductive material. [6] Component assembly according to one of claims 1 to 5, characterized by that the barb elements (32; 32a to 32d) consist of steel, titanium, hard metal, ceramic, metallic glasses, PKD, CBN or a mixture of such materials. [7] Component assembly according to one of claims 1 to 6, characterized by that the barb elements (32; 32a to 32d) are arranged in the form of a single barb layer with lateral distances or gaps (38) between the barb elements (32; 32a to 32d) in the adhesive layer (26) of the adhesive tape (25). [8] Component assembly according to one of claims 1 to 7, characterized bythat the barb elements (32; 32a, 32d) have a regular or symmetrical shape when viewed in all spatial directions. [9] Component assembly according to one of claims 1 to 8, characterized by that the barb elements (32; 32a to 32d) are arranged below the surfaces (34, 36) of the adhesive layer (26) in the unjoined state of the components (12, 14). [10] Component assembly according to one of claims 1 to 9, characterized by that the components (12, 14) are designed as components of a housing (16).

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