Multi-piece housing seal, method for automated application of a multi-piece housing seal, and housing comprising a multi-piece housing seal

Abstract

The invention relates to a multi-piece housing seal comprising a first elastic adhesive strip (110) and a second elastic adhesive strip (120), the second elastic adhesive strip (120) covering an application gap. The first elastic adhesive strip (110) and the second elastic adhesive strip (120) are in contact through two sealing gaps (10, 20) and, if the first and second adhesive strips are pressed, they seal the first and second sealing gaps and prevent fluid communication between the interior of the housing and the exterior of the housing. The invention also relates to a method for automated application of a multi-piece housing seal, and to a housing comprising a multi-piece housing seal.

Description

[0001] The present invention relates to a multi-piece housing seal. The present invention also relates to a method for automatically applying a multi-piece housing seal and a housing including a multi-piece housing seal.

[0002] The present invention relates to the technical field of seals, such as those widely used in domestic and industrial applications for sealing and preventing fluid communication between two spaces (volumes). More specifically, a multi-part housing seal is proposed for sealing, wherein the multi-part seal is not self-contained (independent), but rather consists of a sealing strip of finite length.

[0003] Seals are required in many structures across various technical fields, for example in construction and vehicle manufacturing. Sealing elements used for these purposes are designed to seal gaps, such as those that inevitably arise when connecting two components, generally to prevent the ingress of moisture and air, thereby protecting the components behind the seal from damage caused by such ingress, such as corrosion. Mechanical connections, such as those created by screws, often do not provide an adequate seal.

[0004] Therefore, silicone sealants, for example, are often used to achieve a corresponding seal on the produced connections. These sealants can be processed very reliably, but they still require a certain amount of time to cure and therefore often present difficulties in terms of processing technology. This situation is similar to other structural adhesives or sealants, such as those based on epoxides or polyurethanes.

[0005] The sealants used include silicone foams, which are characterized by good flame retardancy and the possibility of reusability. However, they are difficult to handle in automated processes and are relatively expensive.

[0006] Butyl sealants are mature and inexpensive, but on the other hand, their dosage is difficult to control and they are not very resistant to aging. In addition, they are often squeezed out of the gap under high pressure.

[0007] Elastic sealants such as natural rubber and styrene-butadiene rubber have proven sealing properties and are also very temperature-stable. However, since they are not self-adhesive, their handling is quite difficult; in addition, they are inflexible (non-flexible), so the corresponding sealing element must be perfectly adapted to the gap to be sealed.

[0008] Polyurethane foams exhibit good compression properties and allow for automated processing; in addition, so-called foam-in-place (foam) applications are also possible. Disadvantages are the dimensional fluctuations of the foams in question and the fact that these materials are also susceptible to corrosion and degradation when exposed to certain cleaning products.

[0009] EPDM foam shows a similar performance profile; due to its irregular surface design, only limited sealing effects can be achieved therewith.

[0010] EP 3346 518 A1 discloses a seal for use in a housing cover or housing tank of a battery module. In this case, sealing material is introduced into a recess to improve the sealing effect. The seal is a form-in-place foam gasket (FIPFG), in which a liquid foam is applied to the housing cover or tank. This application suffers from the aforementioned disadvantages associated with foamed or liquid-applied sealants.

[0011] DE 9 106 710 U1 discloses a multi-part flat seal (lamellar seal), wherein the flat seal is composed of several parts (segments) of conventional sealing material. The parts are connected to one another by complementary meandering cuts to achieve a positive fit at the contact points.

[0012] The disadvantage is that assembling the components that make up the flat seal is expensive and cumbersome in terms of manufacturing and processing. The application process is also very expensive and cumbersome, as the components must be positioned against one another. The multi-part flat seals described are rarely or not at all suitable for automation applications, as the application requires very high precision.

[0013] DE 202018 105 005 U1 discloses a multi-part flat seal with a metal insert and dowel pins. The metal insert serves as a "locating guide" for the elastomeric seal molded onto it. The dowel pins can be placed together, and thus larger seals can be assembled, without having to produce large stamped parts for this purpose. The described sealing concept is very complex in terms of production and use, as it consists of various components. In particular, these segments are not continuous material (endlos material, annular material), but rather consist of metal segments that must be manufactured separately and adapted to the shape of the seal.

[0014] Therefore, there is a need for a system that can be easily used and handled to reliably seal connections between structural components.

[0015] It is therefore an object of the present invention to provide a sealing material which is easy to apply, has a high sealing effect against air and moisture and which also offers the possibility of easy reopening and closing of the sealed opening.

[0016] One application is in battery modules. Modules contain a large number of battery cells, which must be protected in a housing from external mechanical influences and moisture. To this end, a flange is formed between the housing cover and the housing tank and sealed with a sealant. The use of sealants has the aforementioned disadvantages.

[0017] The object of the present invention is to overcome the disadvantages of the sealants mentioned at the outset. Furthermore, the object of the present invention is to enable simple and reliable automated application of multi-part housing seals.

[0018] This object is achieved in its first aspect by a multi-part housing seal having the features of claim 1 .

[0019] The invention therefore relates to a multi-part housing seal for sealing a housing interior relative to a housing exterior, comprising a first elastic adhesive strip and a second elastic adhesive strip, wherein the first and second adhesive strips are arranged between a first housing element and a second housing element, wherein

[0020] The first adhesive strip comprises a first end section with a first end side (front side) and a first edge face and a second end section with a second end side and a second edge face and is arranged between the first housing element and the second housing element in such a manner that

[0021] The first end side and the second end side are arranged opposite to each other and are separated from each other by an applied gap, and

[0022] the first and second edge faces lie substantially in a plane, and

[0023] wherein the first adhesive strip is arranged in a closed loop between the first housing element and the second housing element, except for the application of a gap, and

[0024] - the second adhesive strip is arranged between the first housing element and the second housing element in such a way that

[0025] The first edge surface of the second adhesive strip contacts the first edge surface of the first adhesive strip and forms a first sealing gap, and

[0026] The second edge surface of the second adhesive strip contacts the second edge surface of the first adhesive strip and forms a second sealing gap, and

[0027] The third edge surface of the second adhesive strip covers (hides) the applied gap, so that when the first shell element and the second shell element are pressed relative to each other with a force F, the first elastic adhesive strip and the second elastic adhesive strip are compressed and expand in the direction of the edge surface, thereby the first edge surface of the second adhesive strip is pressed relative to the first edge surface of the first adhesive strip and seals the first sealing gap, and the second edge surface of the second adhesive strip is pressed relative to the second edge surface of the first adhesive strip and seals the second sealing gap, thereby preventing fluid communication between the inside of the shell and the outside of the shell.

[0028] The sealing is thus now accomplished by means of an adhesive tape which is divided into adhesive strips of certain lengths and which can be applied to the housing element in an automated manner and in a specific arrangement, thereby achieving 100% automated application and sealing.

[0029] The present invention is based on the discovery that, using the arrangement according to the invention, it is also possible to produce an annular closure consisting of a plurality of elastic adhesive strips from a continuous elastic tape (i.e., not a punched flat seal, but rather adhesive strips unwound from a tape roll and cut), which withstands watertightness and corrosion tests. A particular feature of the invention described here is that the housing seal is composed of multiple parts (components). Self-contained (independent, self-contained) seals are typically used, such as sealing rings or flat seals punched from sheet material. These seals do not have any gaps or interruptions, but instead form a self-contained loop.

[0030] According to the present invention, two elastic adhesive strips of limited length and not self-enclosing are arranged on a housing element, such as a sealing flange of a housing, in such a way that when the housing is closed, a sealing effect that reliably prevents moisture from penetrating into the interior of the housing begins. In this arrangement, the first adhesive strip forms an incompletely closed loop. The loop can describe (depict) any route or contour. The loop is not closed because it is interrupted by the application of a gap. The loop of the first adhesive strip is preferably in one plane, so the first adhesive strip is applied (i.e., adhered) to the housing element located in one plane.

[0031] The sealing material used according to the invention is formed by an elastic adhesive strip which is provided as a section of adhesive tape. Adhesive tape is usually provided in fixed lengths, for example as metered goods (meterware) or as a continuous (ring-shaped) goods in the form of a roll (Archimedes spiral) or a winding wound on a core.

[0032] If adhesive strips are mentioned below, this always means elastic adhesive strips.

[0033] In the sense of the present invention, adhesive tape is understood to refer to all sheet structures, such as the foil (film) or foil portion (foil section) of two-dimensional extension, the band, tape portion (tape section) etc. with extended length and limited width, and finally also has a stamping part. Adhesive tape in the sense of the present invention can be applied with adhesive on one side or both sides. Adhesive tape usually has a running length of 10m to 30,000m. The common width of adhesive tape roll or adhesive tape winding is 10,15,19,25 and 30mm. However, other running lengths and adhesive tape widths are also present and are not excluded from the teaching according to the present invention. Adhesive tape can be in the form of a roll, can also be wound on itself in the form of an Archimedean spiral, or can be wound on a reel element.

[0034] The adhesive tape has an upper side extending across the tape surface and a lower side opposite the upper side. The upper and lower sides are arranged substantially coplanar with a distance d corresponding to the thickness of the tape and each has a width b. Edge surfaces are formed at the edges of the tape, arranged substantially perpendicular to the upper and lower sides. The fact that the edge surfaces are nearly perpendicular results from the tape being manufactured from a mother roll on a high-precision manufacturing system, in which multiple strips of tape are cut from the mother roll—that is, the mother roll is separated, for example, using a roller cutter. This manufacturing system also ensures that the edge surfaces of the tape are nearly flat, that is, uniformly flat in the longitudinal direction of the tape, and that the width b of the tape is generally greater than or equal to the thickness d. As a result, the edge surfaces have high surface quality and are precisely geometrically aligned relative to the upper and lower sides of the tape. The longitudinal direction is defined by the direction in which the tape is wound or unwound. The tape has its longest extension in the longitudinal direction.

[0035] For the purposes of the present invention, an adhesive strip is understood to mean a separate part (segment) of an adhesive tape. The general term "adhesive strip" encompasses all sheet-like structures provided with a self-adhesive adhesive on one or both sides, such as two-dimensionally extending foils or foil portions (foil segments), tapes with an extended length and a limited width, tape portions (tape segments), punched parts, etc., as well as corresponding multilayer arrangements. The geometries and properties described above for adhesive tapes also apply to adhesive strips, since an adhesive strip, for the purposes of the present invention, is merely a separate part of an adhesive tape.

[0036] Therefore, the length of the adhesive strip is always less than the length of the tape. Due to separation from the tape, the adhesive strip usually has two cutting edges. The cutting edges form the end sides (front sides) of the adhesive strip. These end sides are usually arranged essentially vertically. However, since the adhesive strip is usually only separated by workers or machines during use, it cannot be assumed that the end sides have such a high surface quality and a precise geometric arrangement relative to the upper and lower sides of the adhesive strip. The present invention cleverly takes this technical application effect into account in that the arrangement of the multi-piece housing seal is such that only the clearly defined edge surfaces of the tape strips contact each other and form a sealing gap.

[0037] The arrangement of the multi-piece housing seal, in particular the use of the second adhesive strip for sealing, thus effectively avoids the use of a cutting edge produced at the application site to form a sealing gap and to seal it.

[0038] Furthermore, the multi-piece housing seal according to the application also takes into account the fact that, in the automated application process, the end sides of the adhesive strips cannot be applied to the housing elements by the applicator infinitely close or even in a contact-like manner. Automated adhesive tape applicators, preferably robotically guided adhesive tape applicators, are subject to limitations which prevent or at least make it very difficult to apply the adhesive tape from the respective continuous portion with contact by the end sides. The multi-piece housing seal according to the application avoids this problem caused by the application in that an application gap is provided, i.e. the end sides are not brought into contact. The adhesive strips are applied to the housing elements in such a way that a defined application gap I A is produced. Thereby, in particular the surface quality of the end sides of the first adhesive strip and its precise geometric arrangement for achieving the sealing effect of the multi-piece housing seal become negligible.

[0039] Furthermore, the application gap also prevents the end sections from overlapping, for example the underside of the first end section of the first adhesive strip and the upper side of the second end section of the first adhesive strip. This can occur if the application head is not applied exactly. This would result in a multi-piece housing seal which is not sealed (leaks).

[0040] In any case, however, the first sealing strip cannot be arranged in such a way (whether manually or by means of an application head guided by an automated operating device) that the first and second end faces are in contact. The sealing effect can then also be achieved in this case. However, the above-mentioned advantages result if the end faces are not in contact.

[0041] "Elasticity" is to be understood as meaning the property of the adhesive strip or adhesive tape to change its geometry under the action of a force and to return to the original shape before the application of the force when the action of the force is removed. Here, the term "elasticity" is to be understood as meaning both the linear elastic behavior of the adhesive strip and the non-linear elastic behavior of the adhesive strip. Due to the fact that the adhesive strip comprises a polymeric material, the term "elasticity" is also to be understood as meaning the viscoelastic behavior. When the first housing element and the second housing element are pressed against one another with a force F, the first and second elastic adhesive strips are compressed, i.e. deformed, and expand in the direction of the edge face, i.e. transversely to the longitudinal direction of the adhesive strip. In this case, the application of the force takes place over the face, preferably uniformly distributed over the entire contact face between the first and second adhesive strips and the first and second housing elements, i.e. uniformly distributed over the upper side and the lower side of the adhesive strip, and not, for example, locally.

[0042] Due to the expansion of the adhesive strip in the direction of the edge face, the contacting edge faces of the first and second adhesive strips are pressed against each other, thereby sealing the first and second sealing gaps. In this case, fluid communication between the housing interior and the housing exterior is reliably prevented.

[0043] Because multi-part housing seals are not closed but consist of two strip-shaped, finite adhesive strips, the sealing gap is the weak link in the tightness. As has already been shown, the placement of the adhesive strips is crucial. On the one hand, it significantly influences the tightness of the multi-part housing seal and, on the other hand, the process reliability in automated applications. However, the properties of the adhesive strips and their layer structure must also be tailored to the application.

[0044] The first and second adhesive strips comprise a pressure-sensitive adhesive, i.e., an adhesive that allows for permanent bonding to virtually any substrate even with relatively light pressure. The pressure-sensitive adhesive exhibits permanent pressure-sensitive adhesive properties at room temperature, i.e., it has sufficiently low viscosity and high contact tack to wet the surface of the respective bonding substrate even with low applied pressure. The adhesive's bondability is based on its adhesive properties, and its releasability is based on its cohesive properties.

[0045] Adhesive in the sense of the present invention can comprise the adhesive based on natural rubber, synthetic rubber or acrylate.But, also other adhesives can be used.Except adhesive, composition can also comprise the material of the performance such as chemical or mechanical stabilizer, color pigment, fiber, particle, phosphorescent material, pharmaceutical active substance or medicine, magnetic or magnetizable particle or other energy regulating adhesive.Especially, term, " adhesive " also should be understood as referring to pressure-sensitive adhesive.According to the general understanding of those skilled in the art, " pressure-sensitive adhesive " should be understood as referring to viscoelastic adhesive, the dry film of its solidification is permanent adhesiveness and keeps adhesiveness at room temperature, and can be pasted on various base materials by slight contact pressure.

[0046] Because the multi-part housing seal according to the present invention is adhered to one side of one of the housing elements, it remains in the position in which it was applied. In particular, it cannot fall out, as would be the case with sealing rings, sealing cords, or non-self-adhesive flat seals. In addition to the resulting operational advantages, this ensures that even after opening the housing and separating the housing elements, the sealing effect of the multi-part housing seal is restored upon reclosing, as the arrangement of the first and second adhesive strips remains unchanged.

[0047] Adhesive tapes generally consist of a carrier and at least one adhesive applied thereto. However, there are also adhesive tapes without a carrier. Particularly preferably, the first and second adhesive strips are constructed without a carrier, the carrier being formed by the adhesive itself.

[0048] As has already been shown, the arrangement of two adhesive strips according to the invention can be advantageously used for sealing a housing, which on the one hand allows simple, safe and precise application and on the other hand enables simple disassembly of the housing elements of the housing.

[0049] The multi-part housing seal can be advantageously further developed in that the second adhesive strip is arranged opposite the first adhesive strip so that the longitudinal direction of the second adhesive strip is

[0050] - parallel to the longitudinal extension of the first end section, and

[0051] - parallel to the longitudinal extension of the second end section.

[0052] Because the second adhesive strip is arranged parallel to the longitudinal direction of the first end section, the first edge surface of the second adhesive strip is also arranged parallel to the first edge surface of the first adhesive strip. The contacting edge surfaces that form the sealing gap are arranged so as to lie flat on top of each other. As a result, the sealing gap is sealed particularly uniformly because the force acting on the contacting edge surfaces due to the expansion of the adhesive strip during sealing is evenly distributed.

[0053] This also applies analogously to the second edge face of the second adhesive strip and the second edge face of the first adhesive strip. The longitudinal direction of the adhesive tape is understood to mean the direction in which the adhesive tape is typically unwound. Typically, this direction is determined by the longitudinal extent of the adhesive tape. In the case of adhesive tape sections or tape cuts (where the section or cut is shorter than the width of the adhesive area), the longitudinal direction of the adhesive tape is determined by the shorter extent of the section or cut. Sections or cuts are also understood to mean die cuts or labels.

[0054] Due to the parallel arrangement, in particular the edge surfaces are arranged coplanarly, and this leads to a better sealing effect in the first and second sealing gaps when the first housing element and the second housing element are pressed against each other with a force F.

[0055] This arrangement also simplifies the application of the adhesive strips, since during application, the first and second adhesive strips are moved only in a straight line in the region of the contacting edge surfaces, i.e., without forming any bends or curves. This also results in an easier and more reliable application process and ensures the sealing effect of the multi-part housing seal.

[0056] However, it is also possible to allow the first and second adhesive strips to describe a curve in the region of the contacting edge surfaces. Even with such an arrangement, a sufficient sealing effect of the first sealing gap and the second sealing gap can be achieved.

[0057] The configuration or layer sequence of the adhesive strips includes a variety of variations. In a preferred embodiment of the elastic adhesive strip, the adhesive strip comprises a polymer foam layer and a pressure-sensitive adhesive layer. The uncoated side of the polymer foam layer has weaker adhesion than the pressure-sensitive adhesive layer. The polymer foam layer preferably comprises at least one poly(meth)acrylate. A multi-part housing seal can advantageously be developed in which the first and / or second adhesive strips comprise a polymer foam layer, and the first side of the polymer foam layer has a pressure-sensitive adhesive layer.

[0058] The polymer foam layer, more particularly the matrix material of the polymer foam layer, comprises at least one poly(meth)acrylate. "Poly(meth)acrylate" is understood to mean a polymer obtainable by free-radical polymerization of acrylic and / or methacrylic monomers and, if appropriate, further copolymerizable monomers. In particular, "poly(meth)acrylate" is understood to mean a polymer whose monomer base consists of at least 50% by weight of acrylic acid, methacrylic acid, acrylic acid esters, and / or methacrylic acid esters, with the polymer containing at least a proportion, preferably at least 30% by weight, of acrylic acid and / or methacrylic acid esters, based on the total monomer base of the polymer in question.

[0059] The polymer foam layer preferably comprises a total of 40 to 99.9% by weight, more preferably a total of 60 to 98% by weight, more particularly a total of 75 to 95% by weight, for example a total of 80 to 90% by weight of poly(meth)acrylates, in each case based on the total weight of the polymer foam layer. One (single) poly(meth)acrylate or two or more poly(meth)acrylates may be present; therefore, the plural term "poly(meth)acrylates"—also in the course of this specification—in its meaning, like the term "total (total)"—includes both the presence of a single poly(meth)acrylate and the presence of two or more poly(meth)acrylates.

[0060] The glass transition temperature of poly (meth) acrylate is preferably <0 ℃, more preferably between -20 and -50 ℃. According to the present invention, the glass transition temperature of the polymer block or polymer in the block copolymer is determined by means of dynamic scanning calorimetry (DSC). To this end, about 5 mg of untreated polymer sample is weighed into an aluminum crucible (volume 25 μl) and sealed with a perforated lid. The measurement is performed using a DSC 204F1 from Netzsch. The operation is carried out under nitrogen to inertize. The sample is initially cooled to -150 ℃, then heated to +150 ℃ at a heating rate of 10K / min, and cooled to -150 ℃ again. The subsequent second heating curve is run again at 10K / min and the change in heat capacity is recorded. The glass transition is identified as a step (step) in the thermal spectrum.

[0061] The poly(meth)acrylate preferably includes at least one functional monomer copolymerized in proportion, more particularly preferably a monomer that reacts with epoxy groups to form covalent bonds. Very preferably, the functional monomer copolymerized in proportion, more particularly preferably a monomer that reacts with epoxy groups to form covalent bonds, contains at least one functional group selected from the group consisting of carboxylic acid groups, sulfonic acid groups, phosphoric acid groups, hydroxyl groups, anhydride groups, epoxy groups, and amino groups; more particularly, it contains at least one carboxylic acid group. Very preferably, the poly(meth)acrylate contains acrylic acid and / or methacrylic acid copolymerized in proportion. All of these groups are reactive with epoxy groups, making the poly(meth)acrylate advantageously suitable for thermal crosslinking with incorporated epoxides.

[0062] The poly(meth)acrylates are preferably crosslinked with the aid of epoxides or with the aid of one or more substances containing epoxy groups. Epoxy-containing substances are more particularly polyfunctional epoxides, i.e., those having at least two epoxy groups; thus, there is generally an indirect linking of the functional group-bearing building blocks of the poly(meth)acrylate. Epoxy-containing substances can include both aromatic and aliphatic compounds.

[0063] The pressure-sensitive adhesive layer preferably comprises at least 50% by weight, more preferably at least 70% by weight, very preferably at least 90% by weight, more particularly at least 95% by weight, for example at least 97% by weight, of one or more poly(meth)acrylates, in each case based on the total weight of the pressure-sensitive adhesive layer.

[0064] In particular, the poly(meth)acrylate of the outer pressure-sensitive adhesive layer is derived from a monomer composition (composition) consisting of:

[0065] 70 to 95% by weight of 2-ethylhexyl acrylate, n-butyl acrylate and / or isobornyl acrylate; more particularly n-butyl acrylate and 2-ethylhexyl acrylate;

[0066] 1 to 15 wt% acrylic acid; and

[0067] 0 to 15% by weight of methyl acrylate.

[0068] The poly(meth)acrylate of the outer pressure-sensitive adhesive layer is preferably thermally crosslinked, more particularly covalently and / or coordinately. Preferred covalent crosslinkers are epoxy compounds, preferred coordinate crosslinkers are aluminum chelates.

[0069] The weight average molecular weight Mw of the poly(meth)acrylate of the outer pressure-sensitive adhesive layer is preferably from 20 000 to 2 000 000 g / mol, more preferably from 100 000 to 1 500 000 g / mol, more particularly from 200 000 to 1 200 000 g / mol. The figures for the average molecular weight Mw in the present specification relate to the determination by gel permeation chromatography.

[0070] The multi-part housing seal can advantageously be developed in such a way that the polymer foam layer itself is a pressure-sensitive adhesive, more particularly a pressure-sensitive, acrylate-based polymer foam, more particularly comprising at least one poly(meth)acrylate. With regard to properties and formulation, reference is made here to the previous statements regarding the polymer foam layer, more particularly the matrix material of the polymer foam layer.

[0071] The multi-part housing seal can therefore benefit from the sealing advantages which acrylate-based pressure-sensitive adhesives have. Acrylate-based polymer foams have viscoelastic properties. As a result, when the first and second edge faces of the first and second end sections come into contact, the first and second adhesive strips flow onto the first and second edge faces of the second adhesive strip. Due to the flow behaviour, which can be equated to a strong wetting of the surface, known from viscoelastic materials, the sealing effect of the multi-part housing seal in the sealing gap is improved. Furthermore, acrylate-based polymer foams have very good temperature resistance in the temperature range from -20 to +120°C, wherein the acrylate-based polymer foams can even withstand temperatures of up to 220°C for short periods of time. Furthermore, these pressure-sensitive adhesives have excellent cold impact resistance, and this is of great significance for many applications, for example in the field of automotive engineering. A particularly important property of acrylate-based polymer foams is that they have an elongation at break of 1000% or more. This means that acrylate-based polymer foams can be stretched to a particularly high degree without tearing. This property is particularly advantageous for the multi-part housing seal according to the application. The high tear resistance can also compensate for different thermal expansions of different materials. As a result, the housing elements to be sealed can be made of different materials which have very different coefficients of thermal expansion. For example, the housing cover can be made of ABS material (acrylonitrile-butadiene-styrene copolymer) and the housing trough can be made of aluminium. In comparison with aluminium, plastic materials have a significantly smaller temperature expansion coefficient. Furthermore, acrylate-based polymer foams have excellent ageing resistance, moisture resistance and chemical resistance, which is particularly advantageous for the reliability and service life of the multi-part housing seal. The multi-part housing seal can advantageously be developed in such a way that the first and / or second adhesive strip comprises a further pressure-sensitive adhesive layer, wherein the further pressure-sensitive adhesive layer is applied to the second side of the polymer foam layer body and said second side is opposite the first side. The further pressure-sensitive adhesive layer preferably corresponds to one of the above-mentioned formulations of the pressure-sensitive adhesive layer.

[0072] It is particularly preferred that the peel adhesion of the additional adhesive layer applied to the second side of the polymer foam layer is weaker than the peel adhesion of the pressure-sensitive adhesive layer applied to the first side of the polymer foam layer. In other words, one side of the polymer foam layer is designed to be weakly adhesive. This is intended to mean that the adhesive force (adhesion force) of the layer designed to be weakly adhesive is less than the adhesive force of the layer applied (i.e. adhered) to the housing element with the elastic adhesive strip. This can be achieved by applying a pressure-sensitive adhesive layer to the polymer foam layer which only has weak adhesion. Although in this case the first or second housing element is then more firmly adhered to the additional adhesive layer, the sealing effect between the first and second housing elements can also be improved as a result. Due to the additional adhesive layer on the second side of the polymer foam layer, i.e., for example on the upper side of the adhesive strip, the sealing effect between the housing element and the polymer foam layer is improved.

[0073] This does not refer to the first and second sealing gaps, but rather to the upper or lower side of the first and second adhesive strips, which is arranged perpendicular to the gaps and in contact with the housing element. If this side is designed to be weakly adhesive, fluid communication at the contact surface between the housing element and the adhesive strips (the upper or lower side of the adhesive strips) can be more reliably prevented.

[0074] On the other hand, the weak adhesion of the additional adhesive layer ensures that the multi-part housing seal remains completely attached to the housing element in contact with the pressure-sensitive adhesive layer with the greater peel adhesion when the housing elements are separated. If one side of the adhesive strip has sufficiently low peel adhesion, the first and second housing elements can be separated again after joining them together without damaging or even destroying the multi-part housing seal. This allows for sustainable reuse of the multi-part housing seal, eliminating the need for reapplying or repositioning the seal and saving time. The housing can thus be easily opened again for repair, replacement, or inspection of components located therein.

[0075] A multi-part housing seal can advantageously be developed in that the second side of the polymer foam layer, which is opposite the first side, has a thermoplastic film or the thermoplastic film is applied to a further pressure-sensitive adhesive layer.

[0076] The thermoplastic film has no or barely noticeable adhesive properties, making it possible to separate the second or first housing element without residue or adhesion in any conceivable configuration of the adhesive strip that includes the thermoplastic film on the second side of the polymer foam layer. If one side of the adhesive strip has very little or no peel adhesion (non-adhesive), the first and second housing elements can be separated again after joining them together without damaging or even destroying the multi-piece housing seal. The multi-piece housing seal is thus reusable, which is sustainable and eliminates the need for reapplying or repositioning the seal, thus saving time. The housing can thus be easily opened again for repair, replacement, or inspection of components located therein.

[0077] The thermoplastic film preferably comprises at least one polymer chosen from the group consisting of thermoplastic polyolefins (TPE-E or TPO), more particularly thermoplastic polyolefin elastomers (POE) and thermoplastic polyolefin plastomers (POP); thermoplastic polystyrene elastomers (TPE-S or TPS), more particularly styrene block copolymers (SBC); thermoplastic polyurethane elastomers (TPE-U or TPU); thermoplastic polyester elastomers and copolyesters (TPE-E or TPC); thermoplastic copolyamides (TPE-A or TPA); and thermoplastic vulcanizates and crosslinked thermoplastic polyolefin elastomers (TPE-V or TPV).

[0078] The thermoplastic film is more particularly composed of at least one, more preferably one, polymer chosen from the group consisting of thermoplastic polyolefins (TPE-E or TPO), more particularly thermoplastic polyolefin elastomers (POE) and thermoplastic polyolefin plastomers (POP); thermoplastic polystyrene elastomers (TPE-S or TPS), more particularly styrene block copolymers (SBC); thermoplastic polyurethane elastomers (TPE-U or TPU); thermoplastic polyester elastomers and copolyesters (TPE-E or TPC); thermoplastic copolyamides (TPE-A or TPA); and thermoplastic vulcanizates and crosslinked thermoplastic polyolefin elastomers (TPE-V or TPV).

[0079] Particularly preferably, the first and second adhesive strips have essentially the same thickness d, in particular a thickness d between 0.1 mm + / - 0.02 mm and 8.0 mm + / - 0.2 mm, particularly preferably a thickness d between 1.5 mm + / - 0.2 mm and 3.0 mm + / - 0.2 mm.

[0080] Since the thickness d of the first and second sealing strips is equal, the edge surfaces forming the first and second sealing gaps have the same, or at least approximately the same, dimensions, and are ultimately arranged on their upper side (i.e., on the side above the adhesive strip) and their lower side (i.e., on the side below the adhesive strip). In this case, no edges or gaps exist. This improves the sealing properties of the sealing gap and the sealing between the housing element and the first and second adhesive strips.

[0081] If the thickness d is less than 0.1 mm, it may happen that the adhesive strip is overstressed and tears when pressed together between the housing elements, with the result that the housing seal is no longer tight.

[0082] If the thickness d is greater than 8.0 mm, it may occur that the adhesive strip expands very strongly and overflows between the housing elements when pressed together between the housing elements.

[0083] A thickness d of between 1.5 mm and 3.0 mm is therefore particularly preferred. An adhesive strip of this thickness can absorb sufficient forces when pressed together, but also does not escape between the housing elements.

[0084] The multi-part housing seal can advantageously be further developed in that the second adhesive strip is a self-adhesive elastic stamping. A self-adhesive elastic stamping is understood to mean an adhesive strip that has been produced into a specific geometric shape by a stamping process. This geometry is preferably adapted to the arrangement of the first and second end sections of the first adhesive strip. In particular, the edge faces of the first and second end sections of the first adhesive strip come into tangential contact with the edge faces of the stamping, thereby forming a first sealing gap and a second sealing gap. The properties and preferred layer structure of the stamping correspond to those listed above for the adhesive strip.

[0085] Punched parts can have complex geometries and are therefore particularly suitable for implementing different shapes, such as adhesive strips cut from a roll of adhesive tape. For example, using punched parts can create the closed outer contour of a multi-part housing seal. This closed outer contour can then also form the final edge with the housing element.

[0086] Preferably, when the first housing element and the second housing element are pressed against each other with a force F, the thickness d of the first adhesive strip and the second adhesive strip decreases by 10% to 60%, more preferably by 30% to 50%. This allows for sufficient expansion of the first and second adhesive strips, thereby sealing the first sealing gap and the second sealing gap.

[0087] There is a proportional relationship between the reduction in thickness d and the force F. The greater the force F acting on the first and second housing elements, the greater the reduction in thickness d of the first and second adhesive strips. Preferably, the thickness d is reduced by 10% to 60%. A reduction of at least 10% is achieved because the applied pressure is sufficiently high and the adhesive strips expand sufficiently so that the first and second sealing gaps are sealed.

[0088] However, the reduction in thickness should also not be too great because otherwise the first and second adhesive strips can expand very strongly when pressed together between the housing elements and spill over between the housing elements. In addition, the adhesive strips can be damaged. In particular, excessive compression, i.e. a reduction in thickness d, can lead to delamination of the polymer foam layer from the pressure-sensitive adhesive layer or delamination of the polymer foam layer from the thermoplastic film, which can result in a non-sealing.

[0089] A reduction in thickness d of between 30% and 50% is particularly suitable for adhesive strips comprising a foamed polymer foam layer based on acrylate. This ensures a good sealing effect and avoids damage to the adhesive tape.

[0090] The multi-part housing seal can be further developed with advantage in such a way that the length l of the second adhesive strip is at least the length l of the applied gap A plus twice the width b of the first adhesive strip, more particularly preferably at least the length l of the applied gap A plus five times the width b of the first adhesive strip. As a result, the edge faces of the contact between the first and second adhesive strips are dimensioned to ensure a reliable sealing.

[0091] The object is achieved in a second aspect thereof by a method for automated application of a multi-part housing seal.

[0092] The method comprises the following steps:

[0093] a) providing a first housing element,

[0094] b) applying a first elastic adhesive strip on the first housing element along a first predetermined contour by means of an application head guided by an automated operating device in the following manner:

[0095] traveling along the first contour and simultaneously unwinding and pressing the adhesive strip material,

[0096] separating (cutting) the adhesive strip material at the end of the first contour traveled by the application head, and

[0097] laying (Ablegen) the first separated adhesive strip material on the first housing element, thereby producing an applied gap, and

[0098] wherein a first end side of the first separate sealing strip material and a second end side of the first separate adhesive strip material are arranged opposite one another by the application head and separated from one another by an application gap, and

[0099] c) applying the second elastic adhesive strip to the first housing element along the second predetermined contour by means of an application head guided by the robot, in the following manner:

[0100] traveling along the second profile while unwinding the adhesive strip material from the adhesive strip roll and pressing the adhesive strip material,

[0101] separating (severing) the adhesive strip material at the end of the second profile traveled by the application head,

[0102] placing a second separate adhesive strip material on the first housing element, and

[0103] wherein an application head guided by an automatic handling device applies a second separate adhesive strip material to the first housing element, so that

[0104] The first edge surface of the second adhesive strip contacts the first edge surface of the first adhesive strip and forms a first sealing gap, and

[0105] The second edge surface of the second adhesive strip contacts the second edge surface of the first adhesive strip and forms a second sealing gap, and

[0106] The third edge surface of the second adhesive strip covers the application gap.

[0107] First, the special arrangement of the adhesive strips in a multi-part housing assembly enables automated application using an application head guided by a robot. Furthermore, only a multi-part housing seal design allows for continuous application using an application head guided by a robot. Therefore, the arrangement of the multi-part housing seal according to the present invention offers particular advantages in terms of application using an application head guided by a robot.

[0108] The multi-piece housing seal has the above-mentioned characteristics and advantages, so they will not be described in detail here.

[0109] The term "profile" is to be understood as meaning the predetermined travel path of the application head guided by the robot. A robot is to be understood as meaning any multi-axis robot, at least two-axis. In the simplest case, this is a plotter or portal robot. However, within the meaning of the present invention, SCARAS or five-axis and multi-axis industrial robots are also to be understood as "robots."

[0110] An application head is understood to mean a device with which an adhesive tape can be unwound from a roll and the unwound portion of the adhesive tape can be separated. Application heads of this type are known in the prior art.

[0111] The method can advantageously be further developed by first applying the first adhesive strip to the first housing element and then applying the second adhesive strip to the first housing element. In this way, the application gap is initially formed by the first adhesive strip. The second adhesive strip can then be precisely applied to the edge surfaces of the first and second end sections, thereby closing the application gap. In this case, a sensor can determine the exact position and / or length of the application gap and guide the application head, which is guided by the robot, in such a way that the second adhesive strip contacts approximately equal portions of the first and second end sections of the first adhesive strip. This ensures a sealing effect.

[0112] However, the method can also be carried out in such a way that first the second adhesive strip is applied to the first housing element and then the first adhesive strip is applied.

[0113] The method can advantageously be further developed by moving the application head in step c) prior to application so that a portion of the edge surface of the second adhesive strip contacts a portion of the first or second edge surface of the first adhesive strip. Because the edge surfaces of the second adhesive strip are already in contact before the second adhesive strip is placed on the first housing element, the second adhesive strip rests against the edge surface of the first adhesive strip when the second separate adhesive strip material is applied to the first housing element. This allows for a more reliable sealing effect. This makes the application process of the multi-piece housing seal more reliable and reduces the risk of leaks.

[0114] This also reduces the requirements for alignment and positioning of the application head guided by the robot, since the second adhesive strip "moves" during application. However, it is important that the first and second adhesive strips overlap in their longitudinal direction, i.e., are not at a distance from one another, such that after application to the first housing element, a gap or space is formed between the first and second adhesive strips.

[0115] The method can advantageously be further developed in that the second adhesive strip is provided in the form of a self-adhesive elastic stamping part and, for this purpose, the application head is designed to apply the stamping part to the first housing element so that the edge faces of the self-adhesive elastic stamping part come into contact with the first and second edge faces of the first adhesive strip and form a first and second sealing gap, and the third edge face of the self-adhesive elastic stamping part covers the application gap.

[0116] Regarding the characteristics and advantages of using stamping parts, please refer to the above statements.

[0117] Test Method

[0118] Gel Permeation Chromatography for Molecular Weight Determination

[0119] The molecular weight data in this specification are based on determinations by gel permeation chromatography. The determination was performed on 100 μl of a sample (sample concentration 4 g / l) that had undergone clarification filtration. The eluent used was tetrahydrofuran with 0.1% by volume of trifluoroacetic acid. The measurement was performed at 25° C. The precolumn used was the following column: PSS-SDV type, 5 μm, ID 8.0mm·50mm. The following columns were used for separation: PSS-SDV type, 5μ, as well as and Each column had an ID of 8.0 mm x 300 mm (columns from Polymer Standards Service; detected using a Shodex RI71 differential refractometer). The flow rate was 1.0 ml / min. Calibration was performed against a PMMA standard (polymethyl methacrylate calibration).

[0120] Leakage test:

[0121] The multi-piece housing seal according to the present invention is adhered to a first square metal plate (external dimensions 80 mm × 80 mm × 5 mm) using the method according to the present invention. The adhesive strips are arranged so that they form a closed square outline in the form of a square. Specifically, a second adhesive strip is placed outside the loop formed by the first adhesive strip. The second adhesive strip covers the gap, thereby forming a closed outer outline. Here, the first and second edge faces of the first and second end segments of the first adhesive strip come into contact with the first and second edge faces of the second adhesive strip. A paste (KMnO4) is then applied to the interior of the square, which turns purple when exposed to water. The same metal plates are then placed on the structure and screwed (fixed). The screws are located outside the square of the adhesive strip, so they do not pierce the interior of the square or the adhesive strip itself. The distance between the metal plates is fixed to exactly 2 mm using two 1 mm thick shims. This structure ensures that the water-reactive paste is contained within the closed space (inside the housing) within the adhesive strip. Water penetration is detected by a color change and indicates that the multi-piece housing seal is not leaking.

[0122] The entire sample was now placed in a water bath and subsequently placed in an autoclave. A slight superatmospheric pressure of 0.3 bar was initially applied; in a second test, a superatmospheric pressure of 3 bar simulated a 30-meter water column. After 30 minutes of storage underwater in the autoclave, the superatmospheric pressure was reduced, the assembly removed, and the color change of the KMnO4 was studied. A color change indicates the water permeability of the multi-part housing seal, while no color change indicates water impermeability (result "Water-permeable yes / no").

[0123] Re-separability of bonded substrates (simulating re-separation of bonded battery covers; re-openability):

[0124] In addition to the gap application, the multi-part housing seal was applied once circumferentially to an aluminum plate (450 x 250 mm, 2.5 mm thickness) using the more adhesive side of the adhesive strip (the upper side of the adhesive strip) at a distance of 30 mm from the plate edge. In this case, a length of I was provided. A A 5mm gap is applied. Another aluminum sheet of the same dimensions (450 x 250 mm, 1 mm thick) is applied to the upper side of the adhesive strip. Two 1mm-thick shims are used to adjust the distance between the metal sheets to exactly 2mm, forming the joint. The assembly is then pressed together using screw clamps. The aluminum sheets are then screwed together using holes provided for this purpose in the corners of the sheets.

[0125] The assembly thus produced was stored for 10 days in a conditioning chamber at 40° C. and 100% relative humidity. After removal, it was conditioned for a further 24 hours at 23° C. and 50% relative humidity.

[0126] The screws and washers were then removed, and a tensioning strap was inserted into the joint on one of the shorter sides. The strap was connected to a testing machine (Zwick). The upper (1 mm thick) plate was pulled away from the multi-part housing seal at an angle of 90° and a speed of 300 mm / min, and the maximum force required for this was measured. The average value from three measurements is reported in Table 1.

[0127] Adhesive strips are provided by cutting the following tapes to length:

[0128] A- 61102 (closed-cell EPDM rubber foam, coated on one side with an acrylic adhesive, total thickness 3200 μm; tesa)

[0129] B- ACX plus 70730 High Resistance (double-sided acrylic foam tape, coated on both sides with acrylic pressure-sensitive adhesive, total thickness 2900 μm; tesa), laminated on one side with a thermoplastic polyurethane film ( U04 / PE, 30μm; Bayer)

[0130] C- ACX plus 70730 High Resistance, with an acrylate PSA applied only on one side, the acrylate foam is therefore exposed on one side (see B, total thickness 2850 μm; tesa)

[0131] D- 92111HiP – High initial Performance, (bonded to itself 3 times, total thickness 3300 μm; tesa); laminated on one side with a thermoplastic polyurethane film ( U04 / PE, 30μm; Bayer)

[0132] E- ACX plus 70730 High Resistance (double-sided acrylic foam tape, coated on both sides with acrylic pressure-sensitive adhesive, total thickness 2900 μm; tesa); Comparative Example

[0133] Table 1: Test results

[0134]

[0135]

[0136] Vgl. = Comparative Example

[0137] The present invention is described with reference to various exemplary embodiments in nine figures. In these figures, there is shown:

[0138] Figure 1 Schematic diagram of a multi-piece housing seal

[0139] Figure 2 a)-d) Cross-section of a multi-piece housing seal

[0140] Figure 3 Definition of the side and direction of the adhesive strip

[0141] Figure 4 Definition of the side and direction of the adhesive strip

[0142] Figure 5 Layer structure of the elastic adhesive strip according to the first variant

[0143] Figure 6 Layer structure of the elastic adhesive strip according to the second variant

[0144] Figure 7 Layer structure of the elastic adhesive strip according to the third variant

[0145] Figure 8 a)-d) Arrangement variants of the multi-part housing seal

[0146] Figure 9 Exemplary illustration of a housing with a multi-piece housing seal

[0147] Figure 1A schematic plan view of the arrangement of a housing seal 100 according to the present invention is shown. The first adhesive strip 110 is attached to the first housing element 1 (not shown). Here, the first adhesive strip forms an almost closed loop. The loop is not completely closed, but interrupted by the application gap 150. The first and second end sides 112 and 115 of the first adhesive strip 110 are arranged to face each other but not in contact, thereby forming an application gap 150. Applying the gap 150 makes it easier for the first elastic adhesive strip 110 to be applied to the housing element 1 (not shown) by an application head guided by an automatic operating device. Applying the gap 150 is laterally covered, i.e., closed, by the third edge face 123 of the second adhesive strip 120. The first adhesive strip 110 and the second adhesive strip 120 are located in the same plane. In the first end section 111, the first adhesive strip 110 and the second adhesive strip 120 contact the first edge face 121 of the second adhesive strip 120 through the first edge face 113 of the first adhesive strip 110 and form a first sealing gap 10. In the second end section 114 , the first adhesive strip 110 and the second adhesive strip 120 are in contact via the second edge surface 116 of the first adhesive strip 110 and the second edge surface 122 of the second adhesive strip 120 and form a second sealing gap 20 .

[0148] Figure 2 Two sections (sections) through a multi-piece housing seal are shown. These sections (sections) are located in plane AA′- Figure 2 a) and b) and plane BB′- Figure 2 c) and d). The cross-sectional plane is also shown in Figure 1 middle.

[0149] Figure 2 A) shows a section through the first and second elastic adhesive strips 110, 120 in the section plane AA′ in the region of the second end section 114. In this case, the first and second adhesive strips 110, 120 are adhered to the first housing element 1 via a pressure-sensitive adhesive layer 51. Figure 2 a) shows the multi-part housing seal after the application process by the application head. Furthermore, the second housing element 2 is placed on the upper side of the first and second adhesive strips. In this embodiment, the upper side of the adhesive strips is formed by the upper side of the polymer foam layer 50 of the adhesive strips 110, 120. The first elastic adhesive strip 110 and the second elastic adhesive strip 120 are in contact with each other via edge surfaces 116 and 122, or these surfaces are at least opposite and do not contact each other or only partially contact each other. A second sealing gap 20 is formed between the edge surfaces 116 and 122. The first and second housing elements 1 and 2 are spaced apart from each other by the thickness d of the first and second adhesive strips.

[0150] The section plane through the first end section 111 and the edge surfaces 113, 121 and the sealing gap 10 is not shown here, since the same conditions exist there and with corresponding adjustments. Figure 2 The diagram in a) also applies to this section.

[0151] Figure 2 b) shows the Figure 2 The same cross-sectional plane AA′ as in a), except that the force F acts on the housing elements 1 and 2. As a result, the first and second elastic adhesive strips 110 and 120 are compressed and the distance between the housing elements 1 and 2 is reduced to a distance d′ (d>d′). In particular, the polymer foam layer 50 of the first and second elastic adhesive strips is compressed and its material is compressed. Due to the action of the force F, the polymer foam layer 50 of the first and second elastic adhesive strips 110, 120 expands in the direction of the edge faces. This is indicated by the curvature (convexity) of the edge faces. The first and second edge faces 116 and 122 cannot or can hardly expand or bend because these edge faces are already in contact. Instead, the expansion causes forces and reaction forces to act on the first and second edge faces 116 and 122, as a result of which the first and second edge faces 116 and 122 are pressed against each other and seal the sealing gap 20.

[0152] The section plane through the first end section 111 and the edge surfaces 113, 121 and the sealing gap 10 is not shown here, since the same conditions exist there and with corresponding adjustments. Figure 2 The diagram in b) also applies to this section.

[0153] Figure 2 c) shows a section in the section plane BB′ through the first and second end sections 111 , 114 of the first elastic adhesive strip 110 . The first adhesive strip 110 is adhered to the first housing element 1 via the pressure-sensitive adhesive layer 51 . Figure 2 c) shows the multi-part housing seal after the application process. Furthermore, the second housing element 2 is placed on the upper side of the first elastic adhesive strip. In this embodiment of the adhesive strip, the upper side is formed by the upper side of the polymer foam layer 50 of the adhesive strip. An application gap 150 is formed between the first end section 111 and the second end section 114 of the first elastic adhesive strip 110. The application gap has a length l A The first and second housing elements 1 , 2 are spaced apart from each other by a thickness d of a first and a second adhesive strip (not shown).

[0154] Figure 2 d) shows the Figure 2c) Same cross-sectional plane BB′, except that force F acts on housing elements 1 and 2. As a result, the first elastic adhesive strip 110 is compressed and the distance between housing elements 1 and 2 is reduced to distance d′ (d>d′). In particular, the polymer foam layer 50 of the first adhesive strip 110 is compressed and its material is compressed. Due to the action of force F, the polymer foam layer 50 of the first elastic adhesive strip 110 expands in the direction of the edge face. This is indicated by the curvature (convexity) of the first end side 112 and the second end side 115 in the application gap 150. The end sides are also edge faces. The length of the application gap is thereby reduced to a length l A ′(l A >l A ').exist Figure 2 d), after the first adhesive strip is pressed, the first end side 112 and the second end side 115 are not in contact (l A ≠0). However, the first elastic adhesive strip can also expand to such an extent that the end sides 112 and 115 come into contact and form a third sealing gap and seal it. To this end, the application gap 150 must be small and approximately corresponds to the expansion experienced by the first elastic adhesive strip 110 under the action of the force.

[0155] Figure 3 Figure 1 shows the side and orientation of adhesive strips 110, 120, 130 and a self-adhesive elastic stamping 140 according to the present invention. The upper side 41 of the adhesive strip is arranged substantially perpendicular to the end side 42 and the edge surface 43. The longitudinal direction of the adhesive strip extends along the length l of the adhesive strip and is perpendicular to the transverse direction 31 of the adhesive strip. When the elastic adhesive strip expands in the transverse direction under pressure, a portion of the edge surface 43 forms the sealing gaps 10 and 20 (not shown). The adhesive strip has a thickness d, a width b, and a length l.

[0156] Figure 4 The end side plan view of the end side 42, 112, 115 of the adhesive strip is shown. The end side of the adhesive strip is produced by cutting the adhesive tape. The lower side 44 and the upper side 41 are arranged opposite each other.

[0157] Figure 5 A first preferred layer structure is shown for elastic adhesive strips 110, 120, 130 or self-adhesive elastic stampings 140. A polymer foam layer 50 has a pressure-sensitive adhesive layer 51 on the underside. The polymer foam layer has a thickness k, and the entire adhesive strip or self-adhesive elastic stamping has a thickness d.

[0158] Figure 6 A second preferred layer structure of elastic adhesive strips 110, 120, 130 or self-adhesive elastic stampings 140 is shown. Figure 5, a polymer foam layer 50 has a pressure-sensitive adhesive layer 51 on the underside. A further pressure-sensitive adhesive layer 52 is arranged on the upper side, i.e., on a second side opposite the first side of the polymer foam layer. The peel adhesion of the further pressure-sensitive adhesive layer 52 is lower than the peel adhesion of the pressure-sensitive adhesive layer 51. The polymer foam layer 50 has a thickness k, and the entire adhesive strips 110, 120, 130 or the self-adhesive elastic stamping 140 has a thickness d. In this second variant, a multi-piece housing seal 100 is thus produced in which the peel adhesion is asymmetrical on the upper and lower sides of the adhesive strips 110, 120.

[0159] Figure 7 A third preferred layer structure of elastic adhesive strips 110, 120, 130 or self-adhesive elastic stampings 140 is shown. Figure 5 and 6 As shown in , a polymer foam layer 50 has a pressure-sensitive adhesive layer 51 on the lower side. A further pressure-sensitive adhesive layer 52 is arranged on the upper side, i.e. on a second side opposite the first side of the polymer foam layer. The peel adhesion of the further pressure-sensitive adhesive layer 52 can be less than, equal to or greater than the peel adhesion of the pressure-sensitive adhesive layer 51. A thermoplastic film 53 is applied to the further pressure-sensitive adhesive layer 52. The polymer foam layer has a thickness k, and the entire adhesive strip or self-adhesive elastic stamping has a thickness d. In this third variant, a multi-piece housing seal 100 is thus produced that has non-adhesive properties on one side.

[0160] Figure 8 A) to D) schematically illustrate four preferred variants of a multi-part housing seal 100. The path of the first adhesive strip 110 is chosen here as an example and should not be considered restrictive in any way. The actual path, i.e., the contour to which the first adhesive strip is applied, may represent any desired other path. Only the end faces of the first adhesive strip should be arranged substantially opposite one another.

[0161] Figure 8 a) and b) each show a multi-part housing seal according to the invention, wherein Figure 8 In a), the second adhesive strip is arranged within the loop formed by the first adhesive strip. That is, the second elastic adhesive strip is in fluid communication with the exterior of the housing only via the third edge surface 123. This arrangement has the advantage of a straight outer peripheral edge interrupted only by the application gap 150. The second adhesive strip 120 seals the application gap 150, which is formed by applying the end sections of the first adhesive strip 110 at intervals starting from the "inside" (inside the housing). If a force F acts on the first and second housing elements 1, 2 (not shown), the first and second sealing gaps 10, 20 are sealed.

[0162] Figure 8 b) shows a multi-part housing seal 100, in which the second adhesive strip 120 is arranged outside the loop formed by the first adhesive strip 110 and the gap 150 is sealed "from the outside" (outside the housing). If a force F acts on the first and second housing elements 1, 2 (not shown), the first and second sealing gaps 10, 20 are sealed.

[0163] Figure 8 c) indicates from Figure 8 Combination of variants of a) and 8b). Figure 8 b), an additional elastic adhesive strip 130 (third elastic adhesive strip) can be arranged in the loop formed by the first adhesive strip. This arrangement can also be applied to the housing element (not shown) in an automatic manner using the method according to the present invention. The third adhesive strip preferably has a length similar to that of the second adhesive strip. The advantage of this structure of the multi-piece housing seal 100 is that two additional sealing gaps are created - the third sealing gap 11 and the fourth sealing gap 21 - and the gaps are additionally sealed "from the inside" (inside the housing). If force F acts on the first and second housing elements 1, 2 (not shown), the first, second, third and fourth sealing gaps 10, 20, 11, 21 are sealed. The additional sealing gaps 11, 21 can make the seal more reliable.

[0164] Figure 8 d) shows a multi-piece housing seal 100, wherein Figure 8 b) or 8c), the second adhesive strip 120 is formed by a self-adhesive elastic stamping. This shape is purely exemplary and should not limit the concept of the invention. The self-adhesive elastic stamping 140 is arranged outside the loop formed by the first adhesive strip 110, and the application gap 150 is sealed "from the outside" (outside the housing) by the stamping 140. The first and second sealing gaps 10, 20 are sealed under the action of the force F on the first and second housing elements 1 and 2. The advantage of the stamping is that a predetermined shape can be provided. The stamping is manufactured in a precision cutting production machine and therefore has a uniformly flat edge surface, which can achieve a good sealing effect. The advantage of this arrangement is that there is a straight peripheral outer edge, which is also not interrupted by the application gap 150 (see Figure 1 ).

[0165] Figure 9The example in Figure 1 shows an example of the use of a multi-part housing seal 100. According to the present invention, first and second elastic adhesive strips 110 and 120 are applied to a first housing element 1. Here, the first housing element 1 is a housing trough. The second housing element 2 is a cover connected to the housing trough via connecting elements 3, such as screws, clips, or rivets. This forces F on the multi-part housing seal 100 and compresses the first and second adhesive strips 110 and 120. This housing can be, for example, a protective casing for a battery module.

[0166] Reference Signs List

[0167] 1 First housing element

[0168] 2 Second housing element

[0169] 3 Connecting elements

[0170] 10 First sealing gap

[0171] 11 Third sealing gap

[0172] 20 Second sealing gap

[0173] 21 Fourth sealing gap

[0174] 30 vertical

[0175] 31 Horizontal

[0176] 41 upper side

[0177] 42 End side

[0178] 43 Edge surface

[0179] 44 lower side

[0180] 50 polymer foam layer

[0181] 51 pressure-sensitive adhesive layer

[0182] 52 Additional pressure-sensitive adhesive layer (weakly adhesive layer)

[0183] 53 Thermoplastic Film

[0184] 100 Multi-Piece Housing Seals

[0185] 111 first end section

[0186] 112 First end side

[0187] 113 first edge surface (first adhesive strip)

[0188] 114 second end section

[0189] 115 Second end side

[0190] 116 second edge surface (first adhesive strip)

[0191] 120 Second elastic adhesive strip

[0192] 121 first edge surface (second adhesive strip)

[0193] 122 second edge surface (second adhesive strip)

[0194] 123 Third edge surface (second adhesive strip)

[0195] 130 Third elastic adhesive strip

[0196] 140 Self-adhesive elastic stamping parts

[0197] 150 Apply gap

Claims

1. A multi-piece housing seal (100) for sealing a housing interior relative to a housing exterior, comprising a first elastic adhesive strip (110) and a second elastic adhesive strip (120), wherein the first elastic adhesive strip (110) and the second elastic adhesive strip (120) are arranged between the first housing element and the second housing element, It is characterized by: - the first elastic adhesive strip (110) comprises a first end section (111) with a first end side (112) and a first edge surface (113) and a second end section (114) with a second end side (115) and a second edge surface (116), and is arranged between the first housing element and the second housing element in such a way that The first end side (112) and the second end side (115) are arranged opposite each other and are separated from each other by an applied gap (150), and The first edge surface (113) and the second edge surface (116) lie substantially in one plane, and wherein the first elastic adhesive strip (110) is arranged in a closed loop between the first housing element and the second housing element, except for the application of a gap (150), and - A second elastic adhesive strip (120) is arranged between the first housing element and the second housing element in such a way that The first edge surface (121) of the second elastic adhesive strip (120) contacts the first edge surface (113) of the first elastic adhesive strip (110) and forms a first sealing gap (10), and The second edge surface (122) of the second elastic adhesive strip (120) contacts the second edge surface (116) of the first elastic adhesive strip (110) and forms a second sealing gap (20), and The third edge surface (123) of the second elastic adhesive strip (120) covers the application gap (150), so that When the first housing element and the second housing element are pressed against each other with a force F, the first elastic adhesive strip (110) and the second elastic adhesive strip (120) are compressed and expand in the direction of the edge surfaces (113, 121, 116, 122), thereby The first edge surface (121) of the second elastic adhesive strip (120) and the first edge surface (113) of the first elastic adhesive strip (110) are pressed against each other and seal the first sealing gap (10), and The second edge surface (122) of the second elastic adhesive strip (120) and the second edge surface (116) of the first elastic adhesive strip (110) are pressed against each other and seal the second sealing gap (20), Fluid communication between the housing interior and the housing exterior is thereby prevented.

2. The multi-piece housing seal (100) according to claim 1, characterized in that The second elastic adhesive strip (120) is arranged relative to the first elastic adhesive strip (110) in such a manner that the longitudinal direction (30) of the second elastic adhesive strip (120) is - extends parallel to the longitudinal direction (30) of the first end section (111), and - extends parallel to the longitudinal direction (30) of the second end section (114).

3. The multi-piece housing seal (100) according to claim 1 or 2, characterized in that The first elastic adhesive strip (110) and / or the second elastic adhesive strip (120) comprises a polymer foam layer (50) and the first side (44) of the polymer foam layer (50) has a pressure-sensitive adhesive layer (51).

4. The multi-piece housing seal (100) according to claim 3, characterized in that The polymer foam layer (50) itself is a pressure sensitive adhesive.

5. The multi-piece housing seal (100) according to claim 3, characterized in that The polymer foam layer (50) itself is a pressure sensitive adhesive acrylate-based polymer foam.

6. The multi-piece housing seal (100) according to claim 3, characterized in that The first elastic adhesive strip (110) and / or the second elastic adhesive strip (120) comprises an additional pressure-sensitive adhesive layer (52), wherein the additional pressure-sensitive adhesive layer (52) is applied to the second side (41) of the polymer foam layer (50), and the second side (41) is opposite to the first side (44).

7. The multi-piece housing seal (100) according to claim 3, characterized in that A second side (41) of the polymer foam layer (50), opposite the first side (44), has a thermoplastic film (53) or a thermoplastic film (53) is applied to a further pressure-sensitive adhesive layer (52).

8. The multi-piece housing seal (100) according to claim 1 or 2, characterized in that The first elastic adhesive strip (110) and the second elastic adhesive strip (120) have substantially the same thickness d.

9. The multi-piece housing seal (100) according to claim 8, characterized in that The first elastic adhesive strip (110) and the second elastic adhesive strip (120) have a thickness d between 0.1 mm + / - 0.02 mm and 8.0 mm + / - 0.2 mm.

10. The multi-piece housing seal (100) according to claim 8, characterized in that The first elastic adhesive strip (110) and the second elastic adhesive strip (120) have a thickness d between 1.5 mm + / - 0.2 mm and 3.0 mm + / - 0.2 mm.

11. The multi-piece housing seal (100) according to claim 1 or 2, characterized in that The first elastic adhesive strip (110) and / or the second elastic adhesive strip (120) is an adhesive tape.

12. The multi-piece housing seal (100) according to claim 11, characterized in that The first and second elastic adhesive strips consist essentially of a self-adhesive adhesive.

13. The multi-piece housing seal (100) according to claim 12, characterized in that The first and second elastic adhesive strips consist essentially of an acrylate-based adhesive.

14. The multi-piece housing seal (100) according to claim 1 or 2, characterized in that The second elastic adhesive strip (120) is a self-adhesive elastic stamping (140).

15. The multi-piece housing seal (100) according to claim 1 or 2, characterized in that When the first housing element (1) and the second housing element (2) are pressed against each other with a force F, the thickness d of the first elastic adhesive strip (110) and the second elastic adhesive strip (120) is reduced by 10% to 60%.

16. The multi-piece housing seal (100) according to claim 1 or 2, characterized in that When the first housing element (1) and the second housing element (2) are pressed against each other with a force F, the thickness d of the first elastic adhesive strip (110) and the second elastic adhesive strip (120) is reduced by 30% to 50%.

17. The multi-piece housing seal (100) according to claim 1 or 2, characterized in that The length l of the second elastic adhesive strip (120) is at least the length l of the application gap (150) A Add twice the width b of the first elastic adhesive strip (110).

18. The multi-piece housing seal (100) according to claim 1 or 2, characterized in that The length l of the second elastic adhesive strip (120) is at least the length l of the application gap (150) A Add five times the width b of the first elastic adhesive strip (110).

19. The multi-piece housing seal (100) according to claim 3, characterized in that The polymer foam layer (50) comprises at least one poly(meth)acrylate.

20. The multi-piece housing seal (100) according to claim 19, characterized in that The matrix material of the polymer foam layer (50) comprises at least one poly(meth)acrylate.

21. The multi-piece housing seal (100) of claim 19, wherein: The polymer foam layer ( 50 ) comprises a total of 40 to 99.9% by weight of poly(meth)acrylates, based in each case on the total weight of the polymer foam layer ( 50 ).

22. The multi-piece housing seal (100) of claim 19, wherein: The polymer foam layer ( 50 ) comprises a total of 60 to 98% by weight of poly(meth)acrylates, based in each case on the total weight of the polymer foam layer ( 50 ).

23. The multi-piece housing seal (100) of claim 19, wherein: The polymer foam layer ( 50 ) comprises a total of 75 to 95% by weight of poly(meth)acrylates, based in each case on the total weight of the polymer foam layer ( 50 ).

24. The multi-piece housing seal (100) of claim 19, wherein: The polymer foam layer ( 50 ) comprises a total of 80 to 90% by weight of poly(meth)acrylates, based in each case on the total weight of the polymer foam layer ( 50 ).

25. The multi-piece housing seal (100) of claim 19, wherein: The glass transition temperature of poly(meth)acrylates is < 0°C.

26. The multi-piece housing seal (100) of claim 19, wherein: The glass transition temperature of poly(meth)acrylates is between -20 and -50°C.

27. The multi-piece housing seal (100) of claim 19, wherein: The poly(meth)acrylate includes at least one functional monomer copolymerized in a certain proportion.

28. The multi-piece housing seal (100) according to claim 27, characterized in that The functional monomer is a monomer that reacts with an epoxy group to form a covalent bond.

29. The multi-piece housing seal (100) of claim 19, wherein: The poly(meth)acrylates are crosslinked by means of epoxides or by means of one or more substances containing epoxy groups.

30. The multi-piece housing seal (100) of claim 3, wherein: The pressure-sensitive adhesive layer ( 51 ) comprises at least 50% by weight of one or more poly(meth)acrylates, based in each case on the total weight of the pressure-sensitive adhesive layer ( 51 ).

31. The multi-piece housing seal (100) of claim 3, wherein: The pressure-sensitive adhesive layer ( 51 ) comprises at least 70% by weight of one or more poly(meth)acrylates, based in each case on the total weight of the pressure-sensitive adhesive layer ( 51 ).

32. The multi-piece housing seal (100) of claim 3, wherein: The pressure-sensitive adhesive layer ( 51 ) comprises at least 90% by weight of one or more poly(meth)acrylates, based in each case on the total weight of the pressure-sensitive adhesive layer ( 51 ).

33. The multi-piece housing seal (100) of claim 3, wherein: The pressure-sensitive adhesive layer ( 51 ) comprises at least 95% by weight of one or more poly(meth)acrylates, based in each case on the total weight of the pressure-sensitive adhesive layer ( 51 ).

34. The multi-piece housing seal (100) of claim 3, wherein: The pressure-sensitive adhesive layer ( 51 ) comprises at least 97% by weight of one or more poly(meth)acrylates, based in each case on the total weight of the pressure-sensitive adhesive layer ( 51 ).

35. The multi-piece housing seal (100) of claim 3, wherein: The additional pressure-sensitive adhesive layer (52) applied to the second side (41) of the polymer foam layer (50) has a peel adhesion that is weaker than the peel adhesion of the pressure-sensitive adhesive layer (51) applied to the first side (44) of the polymer foam layer (50).

36. The multi-piece housing seal (100) of claim 7, wherein: The thermoplastic film (53) comprises at least one polymer selected from the group consisting of thermoplastic polyolefins; thermoplastic polystyrene elastomers; thermoplastic polyurethane elastomers; thermoplastic polyester elastomers and copolyesters; thermoplastic copolyamides; and thermoplastic vulcanizates and cross-linked thermoplastic polyolefin elastomers.

37. The multi-piece housing seal (100) of claim 36, wherein: The thermoplastic polyolefins are thermoplastic polyolefin elastomers and thermoplastic polyolefin plastomers.

38. The multi-piece housing seal (100) of claim 36, wherein: The thermoplastic polystyrene elastomer is a styrene block copolymer.

39. The multi-piece housing seal (100) of claim 3, wherein: The poly(meth)acrylate of the outer pressure-sensitive adhesive layer is derived from monomers consisting of: 70 to 95% by weight of 2-ethylhexyl acrylate, n-butyl acrylate and / or isobornyl acrylate; 1 to 15 wt% acrylic acid; and 0 to 15% by weight of methyl acrylate.

40. The multi-piece housing seal (100) of claim 3, wherein: The poly(meth)acrylate of the outer pressure-sensitive adhesive layer is derived from monomers consisting of: 70 to 95% by weight of n-butyl acrylate and 2-ethylhexyl acrylate; 1 to 15 wt% acrylic acid; and 0 to 15% by weight of methyl acrylate.

41. The multi-piece housing seal (100) of claim 3, wherein: The weight-average molecular weight Mw of the poly(meth)acrylate of the outer pressure-sensitive adhesive layer is from 20 000 to 2 000 000 g / mol, the figures for the average molecular weight Mw relating to the determination by gel permeation chromatography.

42. The multi-piece housing seal (100) of claim 41, wherein: The weight-average molecular weight Mw of the poly(meth)acrylate of the outer pressure-sensitive adhesive layer is from 100 000 to 1 500 000 g / mol.

43. The multi-piece housing seal (100) of claim 41, wherein: The weight-average molecular weight Mw of the poly(meth)acrylate of the outer pressure-sensitive adhesive layer is from 200 000 to 1 200 000 g / mol.

44. The multi-piece housing seal (100) of claim 3, wherein: The housing seal is developed in such a way that the polymer foam layer itself is a pressure-sensitive adhesive.

45. The multi-piece housing seal (100) of claim 44, wherein: The polymer foam layer itself is a pressure-sensitively adhesive acrylate-based polymer foam.

46. ​​The multi-piece housing seal (100) of claim 45, wherein: The pressure-sensitively adhesive acrylate-based polymer foam comprises at least one poly(meth)acrylate.

47. The multi-piece housing seal (100) of claim 45, wherein: Housing seals can benefit from the sealing advantages offered by acrylate-based pressure-sensitive adhesives.

48. The multi-piece housing seal (100) of claim 45, wherein: Acrylate-based polymer foams have very good temperature resistance in the temperature range of -20 to +120°C; acrylate-based polymer foams can even withstand temperatures of up to 220°C for short periods of time.

49. The multi-piece housing seal (100) of claim 44, wherein: The pressure-sensitive adhesive has excellent cold shock resistance.

50. The multi-piece housing seal (100) of claim 45, wherein: The acrylate-based polymer foam has an elongation at break of 1000% or more.

51. The multi-piece housing seal (100) of claim 3, wherein: The housing seal is developed in that the adhesive strip comprises an additional pressure-sensitive adhesive layer, wherein the additional pressure-sensitive adhesive layer is applied to a second side of the polymer foam layer, the second side being opposite the first side.

52. The multi-piece housing seal (100) of claim 51, wherein: The further pressure-sensitive adhesive layer comprises at least 50% by weight of one or more poly(meth)acrylates, based in each case on the total weight of the further pressure-sensitive adhesive layer.

53. The multi-piece housing seal (100) of claim 51, wherein: The further pressure-sensitive adhesive layer comprises at least 70% by weight of one or more poly(meth)acrylates, based in each case on the total weight of the further pressure-sensitive adhesive layer.

54. The multi-piece housing seal (100) of claim 51, wherein: The further pressure-sensitive adhesive layer comprises at least 90% by weight of one or more poly(meth)acrylates, based in each case on the total weight of the further pressure-sensitive adhesive layer.

55. The multi-piece housing seal (100) of claim 51, wherein: The further pressure-sensitive adhesive layer comprises at least 95% by weight of one or more poly(meth)acrylates, based in each case on the total weight of the further pressure-sensitive adhesive layer.

56. The multi-piece housing seal (100) of claim 51, wherein: The further pressure-sensitive adhesive layer comprises at least 97% by weight of one or more poly(meth)acrylates, based in each case on the total weight of the further pressure-sensitive adhesive layer.

57. The multi-piece housing seal (100) of claim 51, wherein: The poly(meth)acrylate of the further pressure-sensitive adhesive layer is derived from monomers consisting of: 70 to 95% by weight of 2-ethylhexyl acrylate, n-butyl acrylate and / or isobornyl acrylate; 1 to 15 wt% acrylic acid; and 0 to 15% by weight of methyl acrylate.

58. The multi-piece housing seal (100) of claim 51, wherein: The poly(meth)acrylate of the further pressure-sensitive adhesive layer is derived from monomers consisting of: 70 to 95% by weight of n-butyl acrylate and 2-ethylhexyl acrylate; 1 to 15 wt% acrylic acid; and 0 to 15% by weight of methyl acrylate.

59. The multi-piece housing seal (100) of claim 51, wherein: The weight-average molecular weight Mw of the poly(meth)acrylate of the further pressure-sensitive adhesive layer is from 20 000 to 2 000 000 g / mol, the figures for the average molecular weight Mw relating to the determination by gel permeation chromatography.

60. The multi-piece housing seal (100) of claim 59, wherein: The weight-average molecular weight Mw of the poly(meth)acrylate of the further pressure-sensitive adhesive layer is from 100 000 to 1 500 000 g / mol.

61. The multi-piece housing seal (100) of claim 59, wherein: The weight-average molecular weight Mw of the poly(meth)acrylate of the further pressure-sensitive adhesive layer is from 200 000 to 1 200 000 g / mol.

62. The multi-piece housing seal (100) of claim 51, wherein: The additional adhesive layer applied to the second side of the polymer foam layer has a peel adhesion that is weaker than the peel adhesion of the pressure-sensitive adhesive layer applied to the first side of the polymer foam layer.

63. The multi-piece housing seal (100) of claim 3, wherein: The housing seal is developed in that the second side of the polymer foam layer, which is opposite the first side, has a thermoplastic film or the thermoplastic film is applied to an additional pressure-sensitive adhesive layer.

64. The multi-piece housing seal (100) of claim 63, wherein: The thermoplastic film comprises at least one polymer selected from the group consisting of thermoplastic polyolefins; thermoplastic polystyrene elastomers; thermoplastic polyurethane elastomers; thermoplastic polyester elastomers and copolyesters; thermoplastic copolyamides; and thermoplastic vulcanizates and crosslinked thermoplastic polyolefin elastomers.

65. The multi-piece housing seal (100) of claim 64, wherein: The thermoplastic polyolefins are thermoplastic polyolefin elastomers and thermoplastic polyolefin plastomers.

66. The multi-piece housing seal (100) of claim 64, wherein: The thermoplastic polystyrene elastomer is a styrene block copolymer.

67. The multi-piece housing seal (100) of claim 1 or 2, wherein: When the first housing element and the second housing element are pressed against one another with a force F, the thickness d of the adhesive strip is reduced by 10% to 60%.

68. The multi-piece housing seal (100) of claim 1 or 2, wherein: When the first housing element and the second housing element are pressed against each other with a force F, the thickness d of the adhesive strip is reduced by 30% to 50%.

69. A housing comprising - a first housing element (1), - a second housing element (2), and - A multi-part housing seal (100) according to any one of claims 1 to 68, arranged between the first housing element and the second housing element.

70. A method of automatically applying a multi-piece housing seal (100) according to any one of claims 1 to 68, comprising the steps of: a) providing a first housing element (1), b) applying a first elastic adhesive strip (110) along a first predetermined contour on the first housing element (1) by means of an application head guided by an automatic handling device, in the following manner: - traveling along the first profile while unwinding and pressing the adhesive strip material from the adhesive strip roll, - separating the adhesive strip material at the end of the first profile travelled by the applicator head, and - laying a first separate adhesive strip material on the first housing element, thereby creating an application gap (150), and wherein a first end side (112) of a first separate sealing strip material and a second end side (115) of a first separate adhesive strip material are arranged opposite one another by an application head and separated from one another by an application gap (150), and c) applying a second elastic adhesive strip (120) along a second predetermined contour on the first housing element (1) by means of an application head guided by an automatic handling device, in the following manner: - traveling along the second profile and simultaneously unwinding the adhesive strip material from the adhesive strip roll and pressing the adhesive strip material, - separation of the adhesive strip material at the end of the second profile travelled by the application head, - laying a second separate adhesive strip material onto the first housing element (1), and wherein an application head guided by an automatic operating device applies a second separate adhesive strip material to the first housing element (1) so that - a first edge surface (121) of the second elastic adhesive strip (120) contacts the first edge surface (113) of the first elastic adhesive strip (110) and forms a first sealing gap (10), and - the second edge surface (122) of the second elastic adhesive strip (120) contacts the second edge surface (116) of the first elastic adhesive strip (110) and forms a second sealing gap (20), and - The third edge face (123) of the second elastic adhesive strip (120) covers the application gap (150).

71. The method according to claim 70, characterized in that First, a first elastic adhesive strip (110) is applied to the first housing element (1), and then a second elastic adhesive strip (120) is applied to the first housing element (1).

72. The method according to claim 70 or 71, characterized in that In step c) the application head is moved before application so that a portion of the edge surface (121, 122) of the second elastic adhesive strip (120) contacts a portion of the first edge surface (113) or the second edge surface (116) of the first elastic adhesive strip (110).

73. The method according to claim 70 or 71, characterized in that The second elastic adhesive strip (120) is provided in the form of a self-adhesive elastic stamping (140), and for this purpose the application head is designed to apply the stamping (140) to the first housing element (1) so that the edge surfaces (121, 122) of the self-adhesive elastic stamping (140) contact the first edge surface (113) and the second edge surface (116) of the first elastic adhesive strip (110) and form the first and second sealing gaps (10, 20), and the third edge surface (123) of the self-adhesive elastic stamping (140) covers the application gap (150).

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