METHOD FOR ATTACHING A HOLDER TO A CONDITIONER BAND AND CONDITIONER BAND WITH HOLDER

Description

[0001] The invention relates to a method for attaching a grommet to a cable bundle and to a cable bundle with a grommet attached to it.

[0002] Grommets are generally used to seal pipe runs at wall penetrations. Specifically in the automotive sector, grommets are used, for example, at wall penetrations from a wet room to a dry room. A key aspect here is often ensuring a reliable longitudinal seal.

[0003] Fittings are typically manufactured using a casting process in which the pipe section is surrounded by a casting material to form the fitting body, using a mold. Polyurethane (PUR) is a commonly used material for this purpose. Due to its low viscosity during processing, the mold must be sealed during the casting process. In particular, a longitudinal seal is desirable even during the casting process.

[0004] German patent DE 10 2015 220 318 A1 describes a nozzle which has a hard outer shell consisting of two shell halves as a mold, which is filled with the casting material to form a nozzle body. The outer shell therefore forms a permanent mold that is part of the nozzle. Additional sealing elements are provided for sealing during the casting process. These are applied to the outer circumference of the pipe assembly, for example, as sealing strips, sealing tape, or sealant. For this purpose, they are inserted into the shell halves and overlap each other when assembled.

[0005] From JP H06 36604 A a nozzle can be taken, for the formation of which an insert is first placed in a casting mold, and then a casting compound is poured in, which together with the insert forms the nozzle, wherein the insert and a part formed by the poured casting compound have different hardnesses.

[0006] Further nozzles can be found, for example, in US 2892013 A and JP H06333433 A.

[0007] Based on this, the invention aims to ensure a reliable and safe seal for a cable run with minimal installation effort.

[0008] The problem is solved according to the invention by a method for attaching a grommet to a conductor string extending in an axial direction with several individual conductors and by a conductor string with a grommet attached to it.

[0009] The process involves the following steps: Attaching a mold around the pipe string, wherein the mold has a main chamber and at least one annular channel adjacent to it in the axial direction, and furthermore forming a sealing element in a two-stage casting process using a first sealing material, which is introduced into the annular channel of the mold in a first casting step, followed by filling the main chamber and forming a nozzle body by introducing a second sealing material into the mold in a second casting step, wherein the previously formed sealing element provides a longitudinal seal for the second sealing material.

[0010] According to the invention, the conductor string provided with the grommet has at least one sealing element cast onto the conductor string made of a first sealing material and a grommet body cast onto the conductor string made of a second material, which connects to the sealing element in the axial direction of the conductor string.

[0011] Of particular note is the two-stage casting process, in which at least one sealing element is formed in the first stage (first casting step), and only then, in the second stage (second casting step), is the actual nozzle body formed. This means that in the first casting step, the first sealing material is poured into the annular channel of the mold surrounding the pipe assembly, and the sealing element is formed through at least partial hardening. Only then—and notably without opening the mold—is the second sealing material poured into the main chamber in a second casting step to form the nozzle body.By forming the sealing element in advance, a sealing function is already achieved, so that when the nozzle body is subsequently cast, a seal for the second sealing material is achieved, so that its flow in the longitudinal direction is at least hindered by the sealing element.

[0012] In the finished grommet, this manifests itself, among other things, in the fact that the first sealing material of the sealing element has penetrated the spaces between individual conductors of the cable bundle. A cable bundle typically consists of a large number of individual conductors, which are also frequently arranged in several layers. The cable bundle is therefore primarily formed by a bundle of individual conductors. These individual conductors are, for example, individual cores (a central conductor surrounded by a sheath). Preferably, the first sealing material has penetrated the interior of the cable bundle through several layers of individual conductors. In In a further preferred embodiment, the process parameters are selected such that the first sealing material completely penetrates the pipe string in the radial direction, so that a complete seal in the axial direction is achieved.

[0013] This two-stage casting process is particularly advantageous for thick cable strands, especially cable bundles. These are understood to be cable strands with a diameter of at least 14 mm, particularly at least 18 mm, or even at least 25 mm or at least 40 mm. Cable strands of such thickness are therefore preferred.

[0014] Furthermore, a sprue point is usually visible on the sealing element due to the manufacturing process, which is particularly designed as a radially protruding sprue dome.

[0015] Compared to the previously known separate application of a sealing element, which is also a two-part design, the particular advantage of the method described here lies in a significant simplification of assembly and manufacturing: No separate manual insertion or attachment of the sealing element is required. Instead, this is done within the two-stage casting process. This process can also be easily automated. Preferably, the casting process is fully automated. After the mold is closed, both the seal and the nozzle body are formed by two fully automated injections of sealing material.

[0016] When casting is mentioned in this context, it generally refers to the introduction of a viscous material into the mold, for example by injection or pouring. After introduction, the introduced material can change its consistency and state, for example by hardening, drying, or foaming. Specifically, the resulting nozzle body is preferably a foamed body.

[0017] In a preferred embodiment, two axially opposed sealing elements are generally formed, which thus define the sleeve body on both sides in the axial direction and ensure a good seal on both sides in the axial direction. The two opposing sealing elements are preferably of the same type and, in particular, identical. The sealing elements generally preferably define the sleeve body only in the axial direction and not in the radial direction.

[0018] In In a preferred embodiment, the two sealing materials are different, with the first sealing material having a higher viscosity than the second. In particular, the first sealing material has a pasty consistency. The second sealing material, in contrast, is more liquid and has, for example, a water-like consistency. Due to the different viscosities, especially the higher viscosity of the first sealing material, a good seal can be achieved and unwanted axial flow of the second sealing material through the sealing element can be prevented.

[0019] Preferably, the first sealing material has a viscosity that is preferably at least 10 times, more preferably at least 100 times or at least 1000 times higher than that of the second sealing material (in each case based on room temperature).

[0020] The viscosity of the first sealing material is, for example, in the range of 1 x 10² < Pa·s to 5 x 10³ < Pa·s, based on a processing temperature in the range of 50°C to 200°C; specifically, the viscosity is, for example, in the range of 5 x 10² < Pa·s to 2 x 10³ < Pa·s, based on a processing temperature of 100°C. At 25°C, the viscosity is preferably generally above 2 x 10³ < Pa·s.

[0021] Alternatively, depending on the choice of material, the viscosity of the first material is lower and is, for example, between 4*10 2< Pas to 1*10 3< Pas at a temperature of 25°C.

[0022] In contrast, the viscosity of the second sealing material is only 1 Pa at 25°C.

[0023] The first sealing material is preferably an elastomer or a rubber, and in particular a butyl rubber. The first sealing material is therefore generally tough-elastic or viscous, and in particular rubber-elastic.

[0024] To reliably introduce the first sealing material, particularly into the spaces between the individual pipes, a preferred embodiment further provides that the sealing material is pressed into the mold under overpressure. The pressure is preferably >0.5 MPa, ideally >1 MPa, and is, for example, in the range of up to 5 MPa or even up to 10 MPa. In particular, the pressure is, for example, 4 MPa.

[0025] In a preferred embodiment, or alternatively, to ensure reliable penetration of the first sealing material, it is provided that the first sealing material is heated to a temperature range between 50 °C and 200 °C, and in particular to a temperature in the range between 80 °C and 160 °C, before being introduced into the mold. The first sealing material is thus pressed into the mold at the specified elevated temperature.

[0026] A thermoplastic elastomer, and in particular a polyurethane, is preferably used as the second sealing material.

[0027] Preferably, the mold forms an outer shell of the nozzle and remains attached to the pipe assembly as part of the nozzle. The mold itself is typically made of a harder material compared to the two sealing materials. In particular, the mold is made of a hard plastic.

[0028] Alternatively, the mold is removed after the casting process.

[0029] The mold features filling openings for the first and second sealing materials. In the finished product, these openings are filled with the respective sealing materials. Specifically, at least one filling opening leads into the annular channel and at least one other into the main chamber.

[0030] The hard outer shell allows the grommet to withstand mechanical stress. In particular, the outer shell serves for mechanical fastening to a through-opening through which the cable bundle is to be routed tightly.

[0031] In general, the mold preferably consists of two half-shells which are connected to each other, in particular by a form-fitting connection and, for example, by locking elements.

[0032] InIn a preferred embodiment, the mold has at least one, and preferably several, openings in a parting line between the two halves, which are filled with sealing material after the casting process. This opening, or at least one of the openings, can be, for example, a filling opening. Alternatively, it can be, for example, an outlet opening through which sealing material can enter from the interior of the mold and, in particular, exit into an external space outside the mold. The sealing material in the openings, and especially the sealing material that has exited into the external space, therefore preferably forms a monolithic sealing element with the sealing material, specifically with the second sealing material, inside the mold.

[0033] The sealing material in the openings has the particular advantage of creating a longitudinal seal, i.e., a longitudinal seal in the area of ​​the separation plane. This seal is therefore oriented almost perpendicular to the wall of the two halves of the shell and thus forms a barrier against cavitation or capillary action, preventing water from penetrating the nozzle longitudinally. This improves longitudinal watertightness.

[0034] InIn a preferred embodiment, the mold is further supported in an additional tool mold during the production of at least one sealing element. This additional tool mold is specifically designed to absorb the radial forces occurring during the casting process and to ensure that the two halves of the mold are not forced apart, particularly when the first sealing material is injected. The tool mold is therefore designed to withstand the aforementioned high pressures. A suitable plastic, such as polypropylene, or a metal, such as aluminum, can be used for this tool mold.

[0035] Independently or additionally to the aforementioned feature of the tool shape, it preferably forms an outer annular channel over an axial section, which surrounds the mold. This outer annular channel is also filled with sealing material, thus forming an outer ring seal. This ring seal rests against a radially projecting annular flange of the mold. The outer ring seal serves, for example, for axial and / or radial sealing and, when the nozzle is installed, is pressed against an edge of the through-hole / wall opening through which the pipe runs.

[0036] The outer annular channel is preferably formed between the tooling and the mold, and is thus bounded by the tooling on one side and the mold on the other. The ring seal, together with the nozzle body, preferably forms a monolithic sealing element. During the casting process, the annular channel and the main chamber are therefore filled together with the second sealing material in the second casting step. Preferably, the second sealing material flows from the inside to the outside into the outer annular channel during the second casting step through suitable openings, in particular through openings subsequently referred to as overflow openings. These are preferably distributed around the entire circumference of the mold.

[0037] Preferably, the mold has at least one, and preferably several, overflow openings that connect the main chamber to the annular space. During the casting process, the second sealing material therefore flows from the main chamber into the annular space, thus forming the outer ring seal.

[0038] In a suitable embodiment, the at least one annular channel is bounded in the axial direction by at least one web and preferably by two webs at the edges, opposite each other in the axial direction. These webs at the edges provide a clear contour of the sealing element.

[0039] In a preferred embodiment, the at least one web, and preferably both webs, are matched to a diameter of the conductor bundle such that they compress it radially. Generally, the conductor bundle is radially compressed in the region of the annular channel. Therefore, the conductor bundle is effectively compacted in this region. At this point, the conductor bundle is deformed and indented compared to the areas adjacent to the annular channel, thus exhibiting a smaller diameter than in adjacent axial regions. In particular, the annular channel and the webs deform the conductor bundle in such a way that a circumferential, annular groove is formed, into which the at least one circumferential web penetrates. The compression in the region of the annular channel, and thus in the region of the sealing element, achieves mechanical fixation of the conductor bundle and, consequently, pull-out resistance in the longitudinal direction.In addition, improved longitudinal sealing is achieved.

[0040] In the compressed area (within the ring channel), at least some of the individual conductors are bent, at least those conductors that are in contact with the webs, specifically conductors of an outermost layer. In particular, these individual conductors – viewed in a longitudinal section – are bent in an approximately U-shape.

[0041] The two webs defining the annular channel preferably have different (radial) heights. In particular, it is provided that an outer web facing away from the nozzle body has a greater height than an inner web facing the nozzle body. This further improves the sealing effect.

[0042] The two halves of the mold abut each other at their end faces in a parting plane. At least one of the two halves, preferably both halves, has a groove on this end face, which runs particularly along the nozzle body and preferably also along the at least one sealing element. Specifically, the groove follows the outer contour of the nozzle body, which in particular forms a radially projecting annular flange. The groove is therefore approximately labyrinthine and can thus also be described as a labyrinth groove. This groove serves, for example, to collect sealing material that escapes from the main chamber in a radial direction at the parting plane.

[0043] An embodiment of the invention is explained in more detail below with reference to the figures. These show: FIG. 1 a perspective exploded view of a conduit with a nozzle and with an additional mold, FIG. 2 a longitudinal section view of the conduit with the nozzle attached, FIG. 3 a perspective view of a half-shell of a mold which also forms an outer shell of the nozzle, FIG. 4 a side view of an outer surface of the FIG 3 Figure 5 shows a longitudinal section of a cable harness with a grommet attached to it according to another variant, Figure 6 shows a perspective view of the cable harness with a grommet attached to it. FIG 5 , as well as FIG 7 a perspective view of another variant of the cable harness with a grommet attached to it.

[0044] In the figures, parts with the same effect are marked with the same reference symbols.

[0045] A in FIG 1 and FIG 2The illustrated conductor string 2 extends in axial direction A and comprises several individual conductors 4, which in the exemplary embodiment are arranged in several layers and form a conductor bundle. The conductor string 2 is, in particular, an electrical cable, and the individual conductors are electrical wires.

[0046] On this line section 2 (see in particular) FIG 2 A nozzle 6 is attached. This nozzle comprises as its main components a mold 8, two sealing elements 10 made of a first sealing material and arranged opposite each other in the axial direction A, and a nozzle body 12 made of a second sealing material arranged between them. The mold 8 also forms a permanent outer shell of the nozzle 6.

[0047] The two sealing elements 10 are positioned opposite each other in the axial direction A and each defines the axial boundary of the nozzle 6. The two sealing elements 10 are designed as cast, in particular disc-shaped, elements that each enclose the individual lines 4, allowing the lines to pass through the respective sealing element 10 in the axial direction A.

[0048] The mold 8 has a radially projecting annular flange 14. An outer ring seal 16 is formed adjacent to this flange in the axial direction A. Preferably, the annular flange 14 is stepped at least, and preferably only, on its one axial annular surface where the outer ring seal 16 is formed. The outer ring seal 16 rests directly against this step. The annular flange 14 is preferably hollow on the inside.

[0049] The grommet 6 generally serves to seal the passage of the cable assembly 2 through a through-opening in a wall. For this purpose, it is typically pressed against an edge of the through-opening, which is formed, for example, in a partition wall, using the annular flange 14. The outer ring seal 16 provides a seal, particularly in the axial direction A. The grommet 8 is installed in a fully assembled state, particularly in a motor vehicle.

[0050] The mold 8 consists of two half-shells 18 which, in the assembled state, are connected to each other in a form-fitting manner, in particular via locking elements 20, which are designed, for example, as locking hooks and locking openings.

[0051] The mold 8 has a circumferential, internal annular channel 22 at each of its ends opposite each other in the axial direction A. This channel is bounded in the axial direction A by opposing webs 24, which project radially and together form a circumferential annular web.

[0052] A main chamber 26 is formed between the two ring channels 22.

[0053] The mold 8 further comprises several filling openings 28. Preferably, each half-shell 18 has one filling opening 28 that leads into the respective annular channel 22. Furthermore, at least one additional filling opening 28 is formed that leads into the main chamber 28. Preferably, this opening is formed in a parting line between the two half-shells 18 (see in particular also [reference to be added]). FIG 3 ).

[0054] In addition to these filling openings 28, further overflow openings 30 are formed, which provide a connection from the main chamber 28 to an external chamber radially outside the mold 8, and in particular to an external chamber laterally adjacent to the ring flange 14. Specifically, the overflow openings 30 open into the external chamber at the step described above.

[0055] As particularly evident from the FIG 3 As can be clearly seen, a (labyrinthine) groove 34 is formed within the parting plane of the two half-shells 18, where their end faces 32 abut each other. This groove follows, in particular, the outer contour of the respective half-shells 18, thus running within the wall of the respective half-shells 18 at their end face 32.

[0056] To produce the nozzle 6, a tool mold 36 is used, which in turn is preferably formed from two tool halves (see below). FIG 1The tool 36 receives the mold 8 during the casting process described below and forms a radial support for the mold. The two tool halves preferably each have a receptacle whose contour is adapted to the outer contour of the mold 8. Specifically, the tool halves have radial contact surfaces that are complementary to the radial outer surfaces of the mold 8, so that a surface contact is formed during the casting process. The tool 36 also forms an outer annular channel 38, which—in conjunction with the outer contour of the mold 8—serves to form the outer ring seal 16. Furthermore, the tool 36 has several filling channels 40 that are aligned with and connected to the filling openings 26 during the casting process.

[0057] The manufacturing and attachment of the grommet 6 to the conductor 2 is carried out as follows: The two half-shells 18 are attached to the conductor 2. For this purpose, the two half-shells 18 are mechanically connected to each other via the locking elements 20. Preferably, the tool mold 32, which receives the casting mold 8, is also attached. The tool halves are preferably mechanically clamped against each other in a manner not shown in detail here.

[0058] In the area of ​​the ring channels 22, the webs 24 press the conductor bundle 2 radially together and compress it. This forms a circumferential groove on the outer circumference of the conductor bundle 2. The individual conductors 4, especially those of the outermost layer, are deformed and, viewed in longitudinal section, run in an approximately U-shape.

[0059] The actual two-stage casting process then begins. First, the two annular channels 22 are filled with the first sealing material, forming the two opposing sealing elements 10. A butyl rubber is preferably used as the first sealing material. This material is viscous and, for example, pasty during processing. The first sealing material is injected into the mold 8 under high pressure, for example, 4 MPa, and at a high temperature, for example, between 80 °C and 160 °C. This forces the first sealing material between the individual lines 4 in the area of ​​the annular channel 22, forming the preferably disc-shaped sealing element 10 through which the individual lines 4 preferably pass one at a time. The first sealing material preferably penetrates the entire radial dimension of the line assembly 2.The first sealing material, pressed in through the filling openings 28, flows along the ring channel 22 around the individual pipes 4 and simultaneously penetrates in a radial direction between the individual pipes 4.

[0060] Due to the high pressing pressure, considerable radial pressure forces act on the casting mold 8, which are absorbed by the tool mold 26.

[0061] After the sealing elements 10 have formed, the second sealing material, in particular a PUR, is introduced into the main chamber 26 in a second stage and completely fills it. The second sealing material has, for example, an aqueous consistency and thus easily penetrates the spaces between the individual pipes 4. The previously formed sealing elements 10 reliably achieve a longitudinal seal for the second sealing material. Depending on the type of the second sealing material, it may also foam up.

[0062] In the second stage of the casting process, the second sealing material also exits through the overflow openings 30 to the outside into the outer annular channel 38 and forms the outer ring seal 16 there.

[0063] Due to the special two-stage casting process, the nozzle 6 exhibits several characteristic features, particularly in the area of ​​the sealing elements 10. Firstly, each sealing element 10 has at least one, and preferably several, dome-shaped injection points formed by the first sealing material, which fill the respective filling openings 28.

[0064] Furthermore, on the outer circumference of the conductor string 2, the sealing element 10 and the sleeve body 12 are separated from each other by a parting line, with the inner web 24 being embedded in this parting line. In contrast, further radially inwards, the sealing element 10 and the sleeve body 12 are in direct contact with each other. Preferably, they form a material-bonded connection in this radially inner region. In the area of ​​the webs 24, the individual conductors are preferably exposed radially on the outside, i.e., they are not surrounded by cast material.

[0065] Overall, the two-stage casting process described here enables a technically simple design and attachment of the nozzle 6 to the pipe section 2. In particular, the casting process is fully automated. Therefore, the separate application of sealing elements is not required. Furthermore, the injection of the first sealing material under high pressure ensures a good seal in the axial direction A.

[0066] The in FIG 5 as well as FIG 6 The illustrated embodiment of a conductor string 2 equipped with the grommet 6 is comparable to the variant according to the FIG 2 built upon. Therefore, the description of the FIG 2 referred.

[0067] FIG 5Figure 1 shows a view of one of the two half-shells 18 of the mold 8 and thus of the parting line between the two half-shells 18. In addition to the (further) filling opening 28 for filling the main chamber 26 with the second sealing material, the mold 8 has openings 42 located within the parting line, which form outlet openings through which the second sealing material can pass from the inside to the outside. Specifically, in this embodiment, these openings 42 are also the previously described overflow openings 30, so that the second sealing material exiting these openings 42 forms the outer ring seal 16 on the outside of the mold 8. The ring seal 16 formed in this way, together with the nozzle body 12, forms a monolithic sealing body, which is produced by the second sealing material in the second casting step.

[0068] Because the openings 42 lie in the parting plane, the sealing material that has penetrated these openings 42 forms a longitudinal seal at the contact surface between the two half-shells 18. Generally, the two half-shells 18 interlock preferably in a tongue-and-groove manner. This longitudinal seal therefore further improves the longitudinal watertightness and, in particular, prevents water from penetrating along these contact surfaces in the longitudinal direction, for example, due to capillary action.

[0069] In the exemplary embodiment of the Figures 5 and 6 The ring seal 16 is designed in particular as a radial seal, which thus seals the conductor string 2, equipped with the nozzle 8, in a radial direction, for example against an edge area of ​​a wall penetration. For this purpose, the ring seal 16 is designed as shown in FIG 5can be seen - for example, provided with a circumferential ring groove into which the circumferential edge of the wall opening can be inserted.

[0070] In the further variant according to FIG 7 is in contrast to the version according to the Figures 5 and 6 The outer ring seal 16 is designed as an axial seal. For this purpose, it is designed in the manner of an O-ring and is located – as in the embodiment according to Figures 5 and 6 - on the ring flange 14 and is arranged in particular in a radial direction spaced away from a typically cylindrical central part of the casting mold 8. Reference symbol list

[0071] 2 Pipeline 4 Individual pipes 6 Grommet 8 Mold 10 Sealing element 12 Grommet body 14 Ring flange 16 Outer ring seal 18 Half shells 20 Locking elements 22 Ring channel 24 Web 26 Main chamber 28 Filling opening 30 Overflow opening 32 End face 34 Groove 36 Tool shape 38 Outer ring channel 40 Filling channel 42 Opening Axial direction

Claims

1. A method for attaching a grommet (6) on a cable bundle (2) with several individual cables, extending in an axial direction (A), with the following steps: - attaching a casting mold (8) about the cable bundle (2), wherein the casting mold (8) has a main space (26) as well as at least one adjacent annular channel (22) in the axial direction (A), as well as in a two-stage casting process - forming a sealing element (10) using a first sealing material which is introduced into the annular channel (22) of the casting mold (8), - subsequent filling of the main space (26) and forming a grommet body (12) by introducing a second sealing material into the casting mold (8), wherein the previously formed sealing element (10) ensures a longitudinal sealing for the second sealing material in the axial direction (A).

2. The method according to the preceding claim, in which the two sealing materials are different, wherein the first sealing material in particular has a higher viscosity than the second sealing material and / or in which an elastomer or rubber is used as the first sealing material and in particular a butyl rubber is used.

3. The method according to any one of the preceding claims, in which the first sealing material is pressed under pressure into the casting mold (8), wherein the pressure is greater than 0.5 MPa and in particular greater than 1 MPa, and / or in which, for the introduction into the casting mold (8), the first sealing material is heated to a temperature in a range between 50 °C and 200 °C, and in particular 80 °C and 160 °C,4. The method according to any one of the preceding claims, in which a thermoplastic elastomer, in particular a polyurethane, is used as a second sealing material.

5. The method according to any one of the preceding claims, in which the casting mold (8) forms an outer shell and remains on the cable bundle (2) as part of the grommet (6).

6. The method according to any one of the preceding claims, in which the casting mold (8) is received in a tool mold (36), which absorbs radial forces occuring during the casting process.

7. The method according to the preceding claim, in which the tool mold (36) has an external annular channel (38) which surrounds the casting mold (8) and is filled with sealing material for the formation of an annular seal (16), wherein the sealing material of the annular seal (16) preferably forms a monolithic sealing body, together with the grommet body (12).

8. The method according to any one of the preceding claims, in which the at least one annular channel (22) is delimited by two peripheral rims (24) which radially compress the cable bundle (2).

9. A cable bundle (2) with a grommet (6) attached thereon, which extends in the axial direction (A), wherein the grommet (6) comprises at least one sealing element (10), casted onto the cable bundle (2), of a first sealing material and a casted grommet body (12) of a second sealing material, connecting thereto in the axial direction (A).

10. The cable bundle (2) according to the preceding claim, wherein the grommet (6) has an outer shell which is formed as a permanent casting mold (8), in which the at least one sealing element (10) and the grommet body (12) are formed by a casting process, wherein the casting mold (8) comprises filling openings (28) for the first and the second sealing material.

11. The cable bundle (2) according to one of both preceding claims, wherein the casting mold (8) has an annular channel (22), in which the sealing element (10) is received, wherein the annular channel (22) is delimited in the axial direction (A) by at least one rim and preferably by at least two opposite rims (24) in axial direction (A), wherein the rims (24) preferably have different heights.

12. The cable bundle (2) according to the preceding claim, wherein, in the area of the annular channel (22), the cable bundle (2) is radially compressed.

13. The cable bundle (2) according to any one of claims 9 to 12, wherein the casting mold (8) is formed of two half-shells (18) and the half-shells (18) abut each other in a separation plane at the front faces (32) and at least one of the half-shells (18) forms a groove (34) at the front face (32).

14. The cable bundle (2) according to the preceding claim, in which the casting mold (8) in the separation plane has at least one opening (42), filled with sealing material.

15. The cable bundle according to any one of claims 9 to 14, in which outside the casting mold (8), and adjacent to it, an annular seal (16) is formed, which is formed in particular by the second sealing material of the grommet body (12) and constitutes with the grommet body (12) in particular a monolithic sealing body of the second sealing material.