Method for producing a fluid-tight threaded connection on a profile, insert and battery box

Abstract

The invention relates to a method for producing a fluid-tight threaded connection (100) in a profile (106), wherein a screw (102) is screwed through a wall (114) of the profile (106) into a chamber (112) located behind the wall (114), thereby forming a threaded opening in the wall (114), wherein the chamber (112) is formed by the wall (114) and an insert (101) inserted into the interior space of the profile (106), wherein a sealant (116) is arranged in the chamber (112), into which the screw (102) is screwed during screwing, during which the sealant (116) is partially pressed by the screw (102) during screwing, the pressed sealant (116) is placed around the screw (102) and the threaded opening, the threaded connection (100) is thus sealed by the sealant (116).

Description

Technical Field

[0001] The present invention relates to a method for creating a fluid-sealed threaded connection on a profile, an insert for a profile, and a battery box. Background Technology

[0002] The invention will now be described primarily in conjunction with the battery box of an electric vehicle.

[0003] The battery box should be waterproof. To this end, the various parts of the battery box can be interconnected, for example, by means of material fitting, to form a continuous housing. For example, the various parts can be welded together.

[0004] However, the welded battery box can be an obstacle during maintenance.

[0005] Alternatively, the battery box can be assembled from individual parts and then sealed with a waterproof coating. For example, wax can be sprayed onto the battery box to form the coating.

[0006] Coating is a complex process in which certain parameters must be strictly adhered to to ensure a reliable seal for the battery compartment.

[0007] The various parts of the battery compartment can also be threaded together with a sealing ring in the middle. However, over time, water may seep into the parts through the threaded connections. To prevent water ingress, the threaded connections can be sealed with a waterproof coating. Summary of the Invention

[0008] Therefore, the technical problem to be solved by the present invention is to provide an improved process for producing fluid-tight threaded connections on profiles, an improved profile insert, and an improved battery box, using the simplest possible design methods. For example, improvements may involve improved sealing of the threaded connection to prevent liquid ingress and / or simplified process control.

[0009] In the scheme described here, a screw is screwed through the wall of a profile into a sealant disposed within the profile. Here, the sealant is partially compressed by the screw. The rotation of the screw causes friction between the sealant and the screw, thereby heating both the sealant and the screw. Due to the localized thermal effect, the sealant may partially liquefy or plasticize and adhere to the screw. Due to the restoring force of the sealant, the liquid sealant can also penetrate into the threaded connection between the screw and the profile, thereby sealing the threaded connection. Furthermore, the restoring force can be such that the elastic sealant conforms to the shape of the screw or thread, thereby sealing the threaded connection.

[0010] To prevent sealant leakage, it is disposed within a cavity in the profile. The cavity also limits the amount of sealant required and helps limit weight. The cavity is proportionally formed by at least one wall of the profile and at least one wall via an insert. Through the insert, the proposed solution can also be applied to standard profiles that do not inherently possess a cavity specifically designed for this purpose.

[0011] A method for creating a fluid-sealed threaded connection on a profile is proposed, wherein a screw is screwed through the wall of the profile into a cavity located behind the wall, thereby forming a threaded opening in the wall, wherein the cavity is formed by at least one wall and an insert inserted into the internal space of the profile, wherein a sealant is arranged in the cavity, the screw is screwed into the sealant upon screwing, and hereby the sealant is partially squeezed by the screw upon screwing, and the squeezed sealant is placed around the screw and the threaded opening, thereby sealing the threaded connection with the sealant.

[0012] In addition, an insert for a profile is proposed, wherein the insert can be arranged in the internal space of the profile and form a chamber for a sealant with at least one wall of the profile, such that the sealant can be partially squeezed when the screw is screwed in, and the squeezed sealant is placed around the threaded opening on the screw and the wall.

[0013] A battery box for an electric vehicle is also proposed, wherein the battery box has at least one profile having at least one insert according to the proposed scheme herein, wherein the insert is arranged in the interior space of the profile and forms a cavity with at least one wall of the profile, wherein a sealant is arranged in the cavity, wherein at least one screw is screwed into the cavity through the wall, wherein the screw is screwed into the sealant, and the threaded connection of the profile is sealed by the sealant in a fluid-tight manner.

[0014] The profile can be a frame profile for the battery box. For example, the profile can be made of metallic materials, particularly aluminum or steel. The profile can be, for example, an extruded profile or a drawn profile. The profile can be an open profile or a closed profile. The profile can have a substantially constant cross-sectional geometry along the main direction of extension. For example, the profile can also be provided with a cavity for weight considerations. In particular, the profile can be a simple hollow profile without internal structure.

[0015] The insert can also be an extruded or drawn profile. For example, the insert can be made of a metallic material, particularly aluminum or steel. For example, the insert can be made of the same material as the profile, and therefore can have the same physical properties, particularly the same thermal expansion properties. Alternatively, the insert can be made of a different material, such as plastic. The insert can have a substantially constant cross-sectional geometry along the main extension direction. For example, for weight reasons, the insert can also be provided with a notch. Before tightening the screws, the insert can be pushed axially into the profile, thereby forming the internal structure of the profile.

[0016] The battery box can be composed of multiple profiles with inserts and other independent components. Specifically, the independent components can be pressed onto the profiles as clamping members of the threaded connections described herein. Similarly, the profiles can be connected to each other using the proposed threaded connection method. The battery box is designed to enclose the battery modules of electric vehicles and protect them from environmental and mechanical influences. The battery box can be part of the electric vehicle's crash structure.

[0017] The insert may have at least one cavity open on at least one side. In the inserted state, the open cavity may form a closed cavity together with at least one wall of the profile. In the inserted state, the insert may be supported on at least two diagonally opposite interior corners of the profile. When the insert is in the inserted state, the cavity may extend substantially along the length of the profile or the insert. At least one wall of the closed cavity may be formed by the outer wall of the profile. If the cavity is arranged at the edge of the profile, then at least two walls of the closed cavity may also be formed by the outer wall of the profile.

[0018] The insert can contact the profile on at least two linear contact surfaces in the cavity region. The contact surfaces can abut against one wall of the profile or different walls of the profile. The contact surfaces can abut against the walls in a planar manner to achieve a sealing effect on the profile. The insert can be slightly larger than the profile to achieve a clamping effect on the profile during insertion. The insert can undergo slight elastic deformation during insertion to achieve the clamping effect. The insert can extend substantially along the entire length of the profile. For example, the mechanical properties of the profile can be adjusted by the inserted portion. Alternatively, each threaded connection or each group of threaded connections can use its own insert. In this case, the individual inserts can be spaced apart from each other.

[0019] The screw can be a standard screw and can be screwed into the existing threads of the wall. The screw can also be a self-tapping screw and can be screwed into a matching mandrel hole in the profile. Self-tapping screws can create threads on the wall. Screws can also be self-drilling and self-tapping screws and can independently drill holes in the wall and create threads within them.

[0020] The sealant can be a durable, elastic substance. The sealant can adhere to at least the insert. The sealant can have thermoplastic properties. When the screw is screwed in, the sealant can be heated and liquefied through friction. The liquefied sealant can wet the screw and create an adhesive effect. Adhesion occurs particularly when the sealant cools and hardens or solidifies. The liquefied sealant can also penetrate the threaded connection and harden there. Alternatively or additionally, the sealant can be specifically squeezed laterally by the screw, generating a restoring force against the squeeze. This restoring force can press the sealant onto the screw and seal it. Furthermore, particles generated during screwing can be trapped within the sealant.

[0021] Screws can clamp clamping components onto a profile. Similarly, screws can be screwed into the profile without clamping components. Screws can also clamp multiple stacked clamping components onto the profile. Clamping components can be, for example, the cover or bottom of a battery compartment. A sealant can be disposed between the clamping components and the profile. The sealant can be the same sealant used in the chamber. The clamping components can have screw holes (Schraubloch) through which the screw is screwed into the profile. The location of the threaded connection can be determined by the screw holes of the clamping components. Screws can also pass through clamping components without holes and then through the profile. The screw head can be placed on the clamping component and press the clamping component against the profile. A sealing washer can be disposed between the head and the clamping component. The sealing washer can be made of a ductile material and can at least partially conform to the contour of the clamping component. The sealing washer can be made of, for example, aluminum.

[0022] Before screwing in, an insert pre-loaded with sealant can be inserted into the profile. Before pushing the insert into the profile, sealant can be placed in the open chambers of the insert. The sealant can be pre-placed by the insert manufacturer in chambers that remain open on at least one side. The sealant can be placed in the open chambers at a slightly larger size so that the insert exerts pressure on the profile when pushed in. The profile is heated during insertion to promote the sliding of the sealant along the profile and / or to improve the adhesion of the sealant to the profile after it cools.

[0023] The sealant can also be metered into the chamber just before screwing it in. The sealant can be metered in a flowable or paste-like state. The sealant can be metered into the cut profile during insertion. The sealant can be metered using a metering device. The sealant can be introduced into the chamber through a nozzle arranged on the end face of the profile or insert. Alternatively, the sealant can be metered using a spray gun inserted into the chamber. The nozzle can be arranged at the end of the spray gun. The spray gun can move along the chamber while metering the sealant. In particular, the sealant can be metered as the spray gun is withdrawn from the chamber.

[0024] The sealant can be applied through the profile opening extending along the cavity. The sealant is metered into the chamber. The profile opening can extend along the chamber. The profile opening breaks through both the chamber wall and the outer wall of the profile. The chamber wall can also be the outer wall of the profile. The chamber wall and the outer wall of the profile can also be spaced apart from each other. The profile opening can then have a wall connecting the chamber wall and the outer wall of the profile. Due to the profile opening, the chamber wall is essentially C-shaped. An application nozzle can be inserted into the chamber through the profile opening to meter the sealant. Therefore, in particular, the sealant can be metered locally into the chamber in the threaded connection area. During metering, the application nozzle can move along the profile opening, and the sealant can be metered from the application nozzle into the chamber in the threaded connection area.

[0025] The chamber can be almost completely filled with sealant. The sealant can be filled from one end of the chamber to the other. This allows for a fluid-tight threaded connection anywhere within the chamber.

[0026] The chamber can be partially filled with sealant at the threaded connection. The location of the threaded connection can be predetermined. The sealant can be metered at the threaded connection location in portions. Therefore, air can be arranged into the chamber between portions. Sealant can be saved by distributing portions along the chamber. Open chambers can be filled only in the area surrounding the threaded connection. A predetermined distance before and after the threaded connection can be filled with sealant. For example, the nozzle can be pulled along the open chamber, and sealant can be metered from the nozzle or spray gun into the open chamber in the threaded connection area. The metering can be interrupted between two threaded connections.

[0027] Butyl material can be metered into the chamber as a sealant. Butyl or butyl-based materials possess durable elasticity and exhibit excellent adhesion to metals, particularly at elevated temperatures. Butyl material can be easily metered from the nozzle. For this purpose, the butyl material can be heated, for example, to a temperature between 130°C and 150°C. When heated, the butyl material is in a paste state and can be plastically deformed. Inside the chamber, the butyl material can be cooled again and hardened into a durable elastic state. Butyl material is reusable. Alternatively, sponge rubber can also be used as a sealant.

[0028] A screw can laterally compress the material of a wall as it is screwed in, drilling through the wall and forming threads in the compressed material. The screw can be a flowable drill screw. The tip of the screw can be placed on the continuous wall of the profile, rotated, and pressed against the wall. Here, the wall is locally heated due to friction until the metal material of the profile becomes flowable. The pressure causes the tip to laterally compress the material of the wall, forming a ring-shaped thickened portion of the wall as it is penetrated. Ideally, the compression is accomplished without cutting. Once the tip has penetrated the wall, it enters the subsequent sealant and essentially laterally compresses it. Fragments that may be generated during penetration can be embedded in the cavity through the sealant. The screw shank adjacent to the tip has a tapered external thread, which is pressed out or forms an internal thread in the still-flowable thickened portion. Ideally, thread formation also does not require cutting. Fragments that may be generated during thread forming can be embedded in the cavity through the sealant. The cylindrical portion of the external thread adjacent to the tapered thread engages with the newly formed internal thread, pulling the screw head adjacent to the cylindrical thread in the direction of the profile. Here, the clamping member located between the screw head and the thread can be pressed against the profile. The hot tip and the also heated tapered portion of the thread heat the sealant during penetration. Friction between the entire screw and the sealant further increases the heat generated by the sealant. The sealant is locally and limitedly liquefied and wets the hot screw. Lateral displacement of the liquid sealant is hindered by the adjacent cold sealant, and high pressure is generated in the liquid sealant. Due to the high pressure, the liquid sealant is also forced into the gap between the internal thread of the profile and the external thread of the screw, thereby permanently sealing the threaded connection. Attached Figure Description

[0029] An advantageous embodiment of the invention will now be explained with reference to the accompanying drawings. Wherein:

[0030] Figure 1 A fluid-sealed threaded connection with an insert is shown according to an embodiment of the present invention;

[0031] Figure 2 An embedded element that is pre-filled according to an embodiment of the present invention is shown; and

[0032] Figure 3 An embedded element that is pre-partially filled according to an embodiment of the present invention is shown.

[0033] The accompanying drawings are merely illustrative and are intended to explain the invention only. Elements with the same or similar functions are referred to by the same reference numerals throughout the drawings. Detailed Implementation

[0034] Figure 1A fluid-tight threaded connection 100 with an insert 101 is shown according to one embodiment. A screw 102 is screwed into a screw hole in a profile 106 at the threaded connection 100. The screw 102 has external threads. The screw hole has internal threads. The profile 106 is a frame profile of a battery box 108 for an electric vehicle. The screw 102 presses a clamping member 110 onto the profile 106. The clamping member 110 is, for example, a cover for the battery box 108.

[0035] Profile 106 is an extruded or drawn profile made of aluminum or steel. Profile 106 has a substantially constant cross-section along its main extension direction. For example, profile 106 may also be bent in areas where its cross-section may be altered. Here, profile 106 is a closed hollow profile with a rectangular cross-section. Therefore, profile 106 can be described as a square tube (Vierkantrohr).

[0036] The insert 101 is also an extruded or drawn profile made of aluminum or steel. The insert 101 also has a substantially constant cross-section along its main extension direction.

[0037] The insert 101 is inserted into the interior space of the profile 106 and abuts against the inner surface of the profile 106 in two diagonally opposite interior corner regions.

[0038] In an inner edge region of profile 106, insert 101 forms a cavity 112 together with wall 114 of profile 106, the cavity extending along the entire length of profile 106. Screw holes are located in wall 114. In alternative embodiments, two or more walls 114 of cavity 112 may also be formed by the walls of profile 106. At threaded connection 100, screw 102 is screwed into cavity 112 through clamping member 110 and through wall 114. Internal threads are formed in wall 114. Clamping member 110 is pressed against wall 114 by screw 102.

[0039] Within the region of chamber 112, insert 101 abuts against the inside of profile 106 with three surfaces. Here, two of the surfaces extend along opposite sides of chamber 112 to seal chamber 112 from the rest of the interior of profile 106. The third surface is a support surface and supports insert 101 to prevent tilting within the interior space.

[0040] In the proposed solution, a sealant 116 is arranged in the chamber 112, at least in the region of the threaded connection 100. A screw 102 is screwed into the sealant 116. The screw 102 at least partially presses the sealant 116 laterally. The pressed sealant 116 contacts the screw 102 and the screw hole, sealing the threaded connection 100 in a fluid-tight manner.

[0041] When the screw 102 is screwed into the sealant 116, the sealant 116 is heated and at least partially liquefied due to the friction between the sealant 116 and the screw 102. In its liquid state, the sealant 116 wets the screw 102 and at least partially penetrates the thread between the internal thread and the screw 102. In the middle. The sealant 116 adheres to the surface of the screw 102 and the internal thread, thereby sealing the thread.

[0042] In one embodiment, the threaded connection 100 is a direct threaded connection. In a direct threaded connection, the screw 102 has penetrated the non-pre-drilled wall 114, thus forming a screw hole and internal threads. In a direct threaded connection, the screw 102 may also optionally penetrate the clamping member 110 first. However, in the example shown, the clamping member 110 has a through hole. For a direct threaded connection, the screw 102 is placed on the profile 106 within the through hole and is rotated. Here, the screw 102 can penetrate the wall 114 in a non-cutting or cutting manner. A sealant 116 disposed behind the wall 114 permanently binds any debris that may occur during the direct threaded connection process.

[0043] As the screw 102 penetrates wall 114, the friction between it and the wall 114 heats both. The heated wall 114 softens, allowing the screw 102 to penetrate. As it penetrates, the screw 102 compresses the metal material of the wall 114 to the side, forming an annular thickened portion on the wall. The screw 102 forms an internal thread inside the thickened portion. The heated screw 102 then penetrates the sealant 116, which has been partially heated by the heated wall 114. This causes the sealant 116 to become a thin, fluid state, wetting the screw 102 and the internal thread particularly well. Debris is also particularly well bound by the low-viscosity sealant 116.

[0044] In one embodiment, the profile 106 and the insert 101 with an empty chamber 112 are cut to the required length for the battery case 108, and then a sealant 116 is metered into the chamber 112 before the threaded connection 100 is made. The sealant 116 can be metered into the chamber 112 through the open end of the chamber 112.

[0045] In one embodiment, a spray gun with a nozzle at one end is inserted into chamber 112 from one side and pushed to the other. Sealant 116 is then metered from the nozzle, and the spray gun is withdrawn from chamber 112 at a predetermined speed. In this case, the speed is such that the sealant 116 flowing from the nozzle fills the entire cross-section of chamber 112. This substantially prevents porosity and cavitation in the sealant 116. The other end of chamber 112 can be sealed before metering begins to prevent leakage of sealant 116.

[0046] In one embodiment, the spray gun retracts through chamber 112, and sealant 116 is metered into the area of ​​the future threaded connection 100. One portion of sealant 116 is metered into each threaded connection 100. One portion fills the cross-section of chamber 112 from a short distance before to a short distance after the threaded connection 100. Between threaded connections 100, chamber 112 remains empty. Thus, the amount of sealant 116 used can be reduced compared to completely filling chamber 112.

[0047] In one embodiment, butyl material is metered into chamber 112 as sealant 116. The butyl material is metered at an elevated temperature. Due to the elevated temperature, the butyl material becomes at least viscous or pasty and can plastically fill the cross-section of the chamber. Furthermore, due to the elevated temperature, the butyl material exhibits good adhesion to the walls of chamber 112. When cooled to ambient temperature, the butyl material retains its elasticity but can no longer undergo plastic deformation. Heating during the screw-in process of screwing in the screw 102 causes the butyl material to become plastically deformable again and adhere well to the screw 102.

[0048] In one embodiment not shown, sealant 116 is metered into chamber 112 through a profile opening extending along chamber 112. The profile opening allows entry into chamber 112 at any location along profile 106.

[0049] For metered dispensing, an application nozzle or filling nozzle is inserted from the outside through the profile opening and meteredly dispenses the sealant into chamber 112.

[0050] In one embodiment, an application nozzle is inserted into the chamber 112 at one end of the profile 106 to begin metering, and during the metering process, the application nozzle moves along the profile opening to the other end of the profile 106. During this process, the chamber 112 is completely filled with sealant 116.

[0051] In an alternative implementation, sealant 116 is metered only to the area of ​​the future threaded connection 100. In this case, as the application nozzle moves along the profile opening, metering begins shortly before the threaded connection and stops or is interrupted shortly after the threaded connection 100 until shortly before the next threaded connection 100. Between threaded connections 100, the chamber 112 remains empty. The application nozzle can move along the profile opening at a constant speed.

[0052] Figure 2An insert 101 pre-filled according to one embodiment is shown. The insert 101 is shown here before insertion into a profile (not shown). Without the profile wall, the insert 101 already forms a cavity 200 open on at least one side. During insertion, at least one open side of the open cavity 200 is closed by at least one wall of the profile.

[0053] Here, the open chamber 200 is completely pre-filled with sealant 116 from one end to the other. Sealant 116 extends from the open chamber 200 on the open side. When pushed into the profile, the sealant 116 is elastically deformed or compressed together. Therefore, the sealant 116 is pre-tightened in the subsequently closed chamber and is strongly pressed against the through screw by the pre-tightening force. The pressure on the screw generates a large amount of friction, resulting in intense heating of the sealant 116. To relieve the pre-tightening force, liquefied sealant 116 penetrates into the threaded connection and seals it.

[0054] Figure 3 A pre-filled insert 101 according to one embodiment is shown. The insert 101 is substantially... Figure 2 Corresponding to the insert in the middle. Here, the open chamber 200, in the subsequent pushed-in state, will have threaded connection positions pre-filled with sealant 116. In this case, in each threaded connection area 300, a portion 302 of sealant 116 is locally metered into the open chamber 200. Here, the sealant 116 also protrudes from the open side of the open chamber 200.

[0055] In other words, a method is proposed to seal direct threaded connections by pre-filled inserts in the profile.

[0056] In the case of direct threaded connections, the tightness of the threads formed by the direct threaded connection cannot be guaranteed. However, in the case of battery systems, this tightness is precisely what is important, even in terms of safety. Existing screw systems, i.e., screws and the profiles in which they are threaded, as well as the screw technology related to the process, cannot provide 100% safety in terms of sealing.

[0057] The proposed solution here ensures that the required seal is achieved in the threads formed by the direct threaded connection.

[0058] By filling an additional mold with sealant, which is then inserted into and clamped within a frame profile in which a threaded connection will subsequently be made, the newly formed threads during the threaded connection process are ensured to be automatically sealed. Soaking the screws in sealant prevents water from seeping into the threads formed by the direct threaded connection.

[0059] If butyl is used as a sealant, the heat generated by friction during thread forming softens the surrounding butyl compound, causing it to adhere to the screw. The adhesion of butyl increases with increasing temperature. This also applies to other sealants. Additional inserts and pre-filled sealant allow the seal presented herein to be used on existing carrier profiles. This will be achieved in the process.

[0060] Therefore, the work of spraying surfaces with substances such as wax or other sealing sprays can be omitted. High-quality results can be achieved through a direct threaded connection to the sealant. Very little effort is involved. The process is very stable and achieves good repeatability.

[0061] The solution presented here is particularly suitable for battery systems, but can also be applied to other fields. High levels of process reliability, along with excellent feasibility and functional guarantees in standard industrial applications, ensure high performance. Direct threaded connections to sealant-filled chambers offer a tolerance-free, space-saving, and contamination-free solution, regardless of screw type. A high level of Technical Cleanliness (TECSA) is achieved by securing and binding any chips that may be generated during drilling and threading of self-tapping and slotted screws.

[0062] Since the apparatus and methods described in the above detailed description are embodiments, those skilled in the art can make extensive modifications to them in a conventional manner without departing from the scope of the invention. In particular, the mechanical arrangement and the proportions between the various elements are merely exemplary.

[0063] List of reference numerals

[0064] 100 threaded connection

[0065] 101 Embedded Components

[0066] 102 screws

[0067] 106 profile

[0068] 108 Battery Box

[0069] 110 Clamping components

[0070] 112 chambers

[0071] 114 wall

[0072] 116 Sealant

[0073] 200 open chambers

[0074] 300 threaded connection area

[0075] 302 copies

Claims

1. A method for creating a fluid-sealed threaded connection (100) on a profile (106), wherein, A screw (102) is screwed through the wall (114) of the profile (106) into a cavity (112) located behind the wall (114), thereby forming a threaded opening in the wall (114), wherein the cavity (112) is formed by the wall (114) and an insert (101) inserted into the interior space of the profile (106), the insert (101) being capable of being pushed into the profile (106) along the main extension direction, wherein, in the insert (101) Before the profile (106) is pushed in, a sealant (116) is arranged in the insert (101). When the screw (102) is screwed in, it is screwed into the sealant (116). Here, the sealant (116) is partially squeezed by the screw (102) when it is screwed in. The squeezed sealant (116) is placed around the screw (102) and the threaded opening, thereby sealing the threaded connection (100) with the sealant (116).

2. The method according to claim 1, wherein, The sealant (116) is metered before being screwed in.

3. The method according to claim 1 or 2, wherein the chamber (112) is substantially completely filled with the sealant (116).

4. The method according to claim 1 or 2, wherein the chamber (112) is partially filled with the sealant (116) in the region of the threaded connection (100).

5. The method according to claim 1 or 2, wherein the sealant (116) is a butyl material.

6. The method according to claim 1 or 2, wherein the screw (102) laterally presses the material of the wall (114) during the screwing in, drills through the wall (114) and forms an internal thread in the pressed material.

7. A battery box (108) for an electric vehicle, wherein, The battery box (108) has at least one profile (106) and at least one insert (101), the insert (101) being disposed in the interior space of the profile (106) and forming a cavity (112) with at least one wall (114) of the profile (106), the insert (101) being pushable into the profile (106) along a main extension direction, wherein, before the insert (101) is pushed into the profile (106), a sealant is disposed in the insert (101). 116), wherein at least one screw (102) is screwed into the chamber (112) through the wall (114), wherein the screw (102) is screwed into the sealant (116) such that the sealant (116) is partially squeezed, the squeezed sealant (116) is placed around the screw hole of the screw (102) and the wall (114), and the threaded connection (100) on the profile (106) is sealed by the sealant (116) in a fluid-tight manner.

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