EP2499704B1 - Method for producing an electric interface and interface - Google Patents

Description

The invention relates to a method for producing a preferably multi-pin, shielded electrical interface, in particular a plug connection, preferably a plug, a socket, a Y-piece, T-piece or the like., With at least one cable connected together with shielding, wherein the interface electrical Includes contacts and wherein the cable with the electrical contacts to be connected wires and a surrounding the wires shield that is to be led by the cable to or in the interface.

Furthermore, the invention relates to a shielded electrical interface, in particular connector, preferably plug, socket, Y-piece or the like., With at least one connected electrical cable and shielding, wherein the interface comprises electrical contacts and wherein the cable to be connected to the electrical contacts Cores / strands and a shield surrounding the others, in particular an interface, which is produced by the method according to the invention.

The term "electrical interface" is to be understood in the broadest sense. For example, this may be a single-pole or multi-pole shielded plug connection, or a so-called Y or T connection or a corresponding connection piece. In order to achieve the best possible shielding attenuation, a 360 ° shielding of the housing is regularly required, for example realized by an umbrella strand.

Basically, there are various ways to realize different interface or connectors with sufficiently good shielding. Especially with plugs with complicated geometries. For example, with angle plugs, T and Y dividers is the realization of a 360 ° shielding, which is to be transmitted from the cable to the interface, extremely expensive and therefore expensive to manufacture or complete the interface.

From practice a variety of interfaces, for example in the form of plugs known. Only by way of example on the WO 2008/061572 A2 or on the DE 20 2007 005 264 U1 directed. The WO 2006/005398 A1 shows in what complicated way a shielding wire is transferred to the connector. The same applies to the EP 0 412 412 A1 ,

By itself, it's off DE 103 50 763 A1 known to produce coaxial cable with angle connectors, which is inserted into the actual connector subsequent cable in a 90 ° arc descriptive mold cavity of an injection mold and molded with a thermoplastic material. A shield must be placed in front of the actual connector and secured there in a conventional manner. This is expensive.

Half shells are regularly provided to form the plug housing, wherein the actual cable space can be at least partially ejected. The shielding is done regularly by crimping, clamping or soldering the exposed, braided shield on the housing or on a separate shielding sleeve.

The electrical contacting and the contacting of the shielding is often done via stamped and bent parts, for example, with integrated crimping claws, which are bent to realize an angled connector by 90 °. Often it is necessary to solder the resulting joints of the respective housing parts in order to achieve a sufficient conductive connection and at the same time a sufficient stability.

From practice, it is also already known to use shrink tubing with metallization to shield attenuation. Also copper adhesive tapes are used, which are then encapsulated.

The known interfaces, in particular connectors, are particularly problematic in terms of production, since it is extremely complicated and complicated to complete the components properly or to assemble a realizing a cable leading from the interface in the interface. The manufacturing process is consuming and therefore expensive, especially when it comes to the interfaces to miniaturized interfaces in the form of tiny connectors.

Furthermore, from the US 5,906,513 a shielded electrical interface known. The interface includes a connected electrical cable and shielding as well as electrical contacts.

The present invention is based on the object of specifying a method for producing a preferably multipolar, shielded electrical interface, in particular a plug connection, preferably a plug, a socket, a Y-piece, a T-piece or the like, according to which a corresponding Interface in a simple manner and can be produced inexpensively. Furthermore, an appropriately prepared interface must be specified.

The above object is achieved by a method having the features of patent claim 1. Thereafter, the inventive method is characterized in that the shielding of the cable or the cable and at least one adjacent to the shielding area is encapsulated around the electrical contacts with an electrically conductive composite material to form a shielding element, wherein the shielding element with respect to the electrical contacts with the involvement of a Insulating body is made of plastic, that the insulating body is produced by encapsulation of the contacts, the contacts are at least partially injection molding technology involved in the insulating body, and wherein the insulating body forms an interface body, and that the insulating body as interface body to form the shield member with the electrically conductive Composite material is overmoulded.

With regard to the interface according to the invention, the above object is achieved by the features of the independent patent claim 12. Thus, the interface is characterized in that the shielding element is formed by overmolding the shield of the cable and at least one adjacent to the shield area around the electrical contacts with an electrically conductive composite material, wherein the shielding element with respect to the electrical contacts by incorporating an insulating plastic body is that the Insulating body is produced by encapsulation of the contacts, wherein the contacts are at least partially injection molding technology involved in the insulating body, and wherein the insulating body forms an interface body, and that the insulating body is overmolded as an interface body to form the shield member with the electrically conductive composite material.

According to the invention, it has been recognized that the shielding coming from the cable can be easily guided into the electrical interface, for example into the plug, into the socket or the like, namely by shielding the cable or forming several shielding elements Cable - the cable and at least one adjacent to the shield area around the electrical contacts with an electrically conductive composite material is molded. It should be noted that the shielding element is spaced from the electrical contacts or insulated by incorporating an insulating body.

In accordance with the invention is essential that a connection with the shielding of the cable is achieved by injection molding technology, although the usual for injection molding thermoplastics have virtually no electrical conductivity. Accordingly, here a composite material is used, which conducts electrically and is suitable for injection molding. The injection molding thus serves on the one hand for electrical contacting of the shield and on the other hand for shaping, so that it is not necessary to crimp the shield, to solder with a shield ring or otherwise as with the electrically conductive components of the interface or with the other electrically conductive housing parts of the interface connect to.

The composite material used for injection molding and thus for the production of the shielding element is injection-moldable and comprises metallic constituents, wherein it is necessary for an electrically conductive surface, a metal matrix or a metal dispersant continuous in the sense of a permeation structure to be present after spraying. In this case, a composite material with low-melting point metal is suitable, and this should preferably have a melting point below 200 ° C. A eutectic or peritectic microstructure with a low melting point is particularly suitable here.

Furthermore, the composite material should comprise a preferably thermoplastic which ultimately forms a type of matrix. The processing temperature, i. the injection molding temperature should be in the range between 250 ° C and 300 ° C. Likewise, it is conceivable that the composite material comprises electrically conductive particles, in particular metal fibers and / or metal pellets, whereby the conductivity and thus suitability of the composite material for injection molding production of the shielding element is again favored.

In accordance with the invention, a composite material for encapsulating and contacting the shield of the cable is thus used, whereby conventional contacts or connections to an interface housing are no longer required. In that regard, a manufacturing simplification is realized.

With regard to the composite material used, it should be mentioned that the thermoplastic material contains from 10 to 25% by weight, the low-melting metal contains from 10 to 40% by weight and the other "additives" from 30 to 75% by weight .-% may be provided, wherein the material as "additives" in particular steel or copper fibers or corresponding pellets are added, which favor the formation of an electrically conductive skeleton. With such a composite, a specific electrical conductivity of up to 10 ⁶ S / m and a thermal conductivity of> 10 W / mK can be achieved after injection molding. Thus, a correspondingly manufactured or sprayed shielding element is particularly suitable for connecting the shielding of the cable to corresponding components of a conventional interface.

In the context of the method according to the invention, the cable is first assembled in a conventional manner, after which the wires, in particular the wire contained in the wires, and the shield are exposed at the end, whereby the electrical insulation between the wire and the shield is maintained.

To form the electrical contacts, the wires or strands of the wire can be crimped. It is also conceivable that the cable strands are overmolded with an electrically conductive material. This may be the same material with which the screen element is injection-molded and thereby attached the cable is molded. It can be complicated lines and connections over the conventional, usually manual methods automatically produce, which already in this respect a significant simplification of the production and thus a reduction in manufacturing costs is achieved.

The cables are, as usual, assembled and inserted into the injection mold. The contacting of the individual strands could also be part of a multi-component injection-molding process, to which reference will be made later. Bridges, transverse webs, other connections can be inserted or connected by injection molding or contacted.

In any case, the generation of the contact pins by injecting such directly on the wire strand, wherein it is possible to produce even geometrically complicated shaped contacts. Any profiles of the contact pins can be realized. In any case, a special crimping or soldering process is no longer necessary if the electrical contacts are produced by injection molding on the strands.

If the electrical contacts - whatever - made, these are at least partially injection molding technology in an insulating body made of plastic, integrated. In the case of the injection molding precaution of such an insulating body, this forms a type of interface body, for example a plug / socket body, whereby a first shaping of the interface takes place. It is essential that the interface body consists of insulating plastic and is connected by injection molding technology with the involvement of the electrical contacts to the cable. The free end of the cable and the previously formed contacts are in the insulating - partially - integrated and positioned according to the required contact during operation.

Furthermore, it is advantageous if, in the interface body, in its shape, functional elements such as locking lugs, springs are integrated oa. A latching lug can be made of the same material as the interface body itself, namely integrally formed by injection molding or integrated, for example projecting inward. It is also possible to have a separate spring element in the Insert injection mold and according to encapsulation, with any positioning of the spring element is possible.

In a further step, it is possible that the interface body formed in accordance with the preceding embodiments, which consists of an electrically insulating material (plastic), is at least partially encapsulated with the electrically conductive composite material to form the above-mentioned shielding element. Specifically, it is conceivable to insert the cable with the interface body produced end again in an injection mold, such that at least the projecting from the cable insulation shielding or the screen forming braid and the interface body are molded. By this measure, the shield element is formed, namely the shielding of the cable is completely inserted into the interface, depending on the extent to which the existing non-conductive plastic interface body is encapsulated with the electrically conductive composite material.

Depending on requirements, it is conceivable that the cable in front of or in the region of the shielding element and at least a portion of the shielding formed in accordance with the preceding embodiments to form the outer shape of the interface or the connector, i. under the formation of a housing, is overmolded with an electrically insulating plastic. This plastic can surround a portion of the end cable and a portion of the shield member or the shield element with the underlying interface body in total. By this measure, the outer shape of the interface body is ultimately defined, for example, a straight or angled plug. Thus, it is possible that the housing in any shapes, for example in the form of an angle plug, including a part of the cable, is injected, whereby the production of the interface is terminated with cable attached. The housing may be the flange housing, i. around the counterpart to a coupling plug.

At the free end, ie at the open end of the resulting interface, any components can be plugged or plugged or screwed or screw in, for example, a threaded ring made of metal. Any couplings, adapters, etc. can be combined with the interface.

The interface produced in accordance with the above statements can be produced in mutually independent injection molding processes in different tools. Likewise, it is conceivable that at least two different, adjoining regions of the interface are produced simultaneously in a single injection molding tool, for example in the overmolding process. It is also possible to produce a plurality of different regions at the same time by injection molding, wherein it is essential in accordance with the invention that both the electrical contacting of at least the shielding and the actual molding can be carried out by injection molding in a single process step. Elaborate montages and completions, so far mostly performed by hand, are no longer required in the inventive manner.

It should be noted at this point that the method according to the invention relates to the encapsulation.

With the independent claim 12 a shielded electrical interface is claimed, which is preferably made by the method according to the invention. It is essential for the interface that the shielding element is formed by encapsulation of the shielding of the cable and at least one region adjacent to the shielding around the electrical contacts with an electrically conductive composite material. The shielding element is spaced from the electrical contacts or isolated by incorporating an insulating body which is not absolutely necessary.

As already stated for the method according to the invention, the composite material comprises metallic constituents, wherein after the spraying a metal surface, a metallic skeleton or a metal disperser continuous in the sense of a permeation structure is realized. The composite material comprises a low-melting point metal, preferably having a melting point below 200 ° C and a preferably thermoplastic material having a processing temperature (injection molding temperature) in the range between 250 ° C and 300 ° C. Further electrically conductive components such as metal fibers or metal pellets favor the electrical conductivity and the properties required for the shielding.

In the interface according to the invention, the contacts may at least partially be injection-molded into an insulating body, wherein the insulating body forms an interface body, in particular a plug / socket body. In the interface body functional elements such as latching noses, spring o. be integrated. Also can be used for connection serving threads and other coupling mechanisms.

The interface body is at least partially encapsulated to form the shielding element, wherein the cable is encapsulated in front of or in the region of the shielding element and at least part of the shielding to form the outer shape of the interface or the connector with an electrically non-conductive plastic. By this measure, ultimately, a housing is formed. The housing can be injection-molded in any desired form, for example by realizing an angle plug or an angle bushing.

Fig. 1a

in einer schematischen Ansicht, geschnitten, ein Ausführungsbeispiel einer erfindungsgemäßen Schnittstelle in Form eines Steckers, bei dem endseitig ein Gewindering vorgesehen ist, wobei der Isolierkörper durch Umspritzen von Kontakten erzeugt ist,

Fig. 1b

in einer schematischen Ansicht, teilweise geschnitten, eine nicht erfindungsgemässe Schnittstelle in Form eines Steckers, bei dem endseitig ein Gewindering vorgesehen ist, wobei der Isolierkörper als Einlegeteil eingebunden ist,

Fig. 2

in einer schematischen Ansicht, geschnitten, ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Schnittstelle in Form eines Steckers, wobei dort sowohl außen als auch innen Rastnasen und ein Schirmelement ausgebildet sind,

Fig. 3

in einer schematischen Ansicht, geschnitten, ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Schnittstelle in Form eines Steckers, wobei dort im Inneren eine Federverrastung spritzgusstechnisch eingebunden ist,

Fig. 4a

in einer schematischen Ansicht, geschnitten, ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Schnittstelle als Verteiler in Form eines Winkelsteckers mit Schraubverschluss,

Fig. 4b

in einer schematischen Ansicht, geschnitten, ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Schnittstelle als Verteiler in Form eines Winkelsteckers mit direkt angeformter, elektrisch leitfähiger Verriegelungseinheit bzw. direkt angespritztem Schirmelement,

Fig. 4c

in einer schematischen Ansicht, geschnitten, ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Schnittstelle als Verteiler in Form eines Winkelsteckers, wobei ein Metalleinlegeteil (Rastnasen, Schirmelement für 360°-Schirmung) umspritzt ist und

Fig. 5

in einer schematischen Ansicht, geschnitten, ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Schnittstelle in Form eines Y-Stücks unter Einbindung von drei Kabeln.

There are now various possibilities for designing and developing the teaching of the present invention in an advantageous manner. For this purpose, on the one hand to the claims 1 and 12 subordinate claims and on the other hand to refer to the following explanation of preferred embodiments of the invention with reference to the drawings. In conjunction with the explanation of the preferred embodiments of the invention with reference to the drawings, generally preferred embodiments and developments of the teaching are explained. In the drawing show

Fig. 1a

in a schematic view, cut, an embodiment of an inventive interface in the form of a plug, in which end a threaded ring is provided, wherein the insulating body is produced by encapsulation of contacts,

Fig. 1b

in a schematic view, partially in section, a not inventive interface in the form of a plug, in the end a threaded ring is provided, wherein the insulating body is incorporated as an insert,

Fig. 2

in a schematic view, cut, another embodiment of an interface according to the invention in the form of a plug, where there are formed both outside and inside locking lugs and a shield member,

Fig. 3

in a schematic view, cut, another embodiment of an interface according to the invention in the form of a plug, wherein there is a Federverrastung injection molding integrated inside there,

Fig. 4a

in a schematic view, cut, another embodiment of an inventive interface as a distributor in the form of an angle plug with screw cap,

Fig. 4b

in a schematic view, cut, another embodiment of an interface according to the invention as a distributor in the form of an angle plug with directly molded, electrically conductive locking unit or directly molded screen element,

Fig. 4c

in a schematic view, cut, another embodiment of an inventive interface as a distributor in the form of an angle plug, wherein a metal insert part (locking lugs, screen element for 360 ° shielding) is encapsulated and

Fig. 5

in a schematic view, cut, another embodiment of an inventive interface in the form of a Y-piece with the involvement of three cables.

Fig. 1 a shows a first exemplary embodiment of an interface produced by the method according to the invention in the form of a plug, where the shielding 1 of a cable 2 is guided into the interface. Fig. 1 a clearly shows that a front portion of the shield 1 is stripped, so that an immediate contact is possible.

Electrically insulated cores 3 protrude further into the interface or the plug and are end equipped by crimping, soldering, etc. or by injection molding with contacts 4.

For the positioning of the electrical contacts 4 and for the integration of these into the plug, an insulating body 5 is created on plastic injection molding technology, in which the electrical contacts 4 are integrated with their crimp connection. The insulating body 5 ultimately forms an interface body, on the building further functional areas - injection molding technology - are generated.

The insulating body 5 is cast according to the invention to form a shield member 6 with an electrically conductive composite material - also injection molding -, wherein the screen element 6 thus produced electrically contacted the shield 1 and this over the insulating body 5 away into the interface or along it leads.

As an additional component, an insulating housing 7 can also be injection-molded - also injection-molded - from an electrically insulating plastic. The housing 7 binds the cable insulation 8 and closes against this tight. The housing 7 extends from the cable insulation 8 at least partially beyond the shield element 6 and can form a stop for pushing on end for a threaded ring 9 or the like. It is also conceivable for the housing 7 produced by injection molding to extend over the entire screen element 6 as far as the front end of the screen element 6, thus covering it in its entirety. Any other shapes and configurations are conceivable.

Fig. 1b shows a not inventive interface in the form of a plug, where - unlike in the embodiment according to Fig. 1a - The insulating body 5 as an insert in the sense an "external" insulating body is inserted. The insulating body 5 provided there corresponds to a plug body in the sense of an insert. Specifically, there is a conventionally manufactured plug body equipped with electrical contacts 4 there. The wires 3 are soldered. In the cable room insulation is provided. The shield element 6 is injected like the shaping outer contour.

Fig. 2 shows a further embodiment of an interface according to the invention in the form of a plug, wherein there the shield element 6 is formed longer and thus compared to the embodiments according to Fig. 1 a and 1 b substantially further protrudes beyond the insulating body 5. For safe coupling according to Fig. 2 Locking lugs 10 realized, namely formed by injection molding technology. It is also possible to integrate an electrically conductive locking unit via a latching hook. Likewise, the integration of one or more resiliently executed, radially arranged contact lugs in the form of molded shield elements is possible, the restoring force presses against the flange housing and thus realizes a circumferential shielding within the interface. The provision of an additional spring ring, which can also be integrated injection molding technology, is conceivable.

According to the above statements, the number of contact resistances can be reduced enormously.

Fig. 3 shows a further embodiment of an inventive interface in the form of a plug, where there in contrast to the in Fig. 2 In the embodiment shown in the extended shielding element 6, an injection-molded spring 11 is provided. It should be noted at this point that the electrical contact of the aforementioned functional elements for the shielding or current conduction can be realized by encapsulation of a metal insert part. In addition, it is advantageous if resilient elements, for example a spring, are provided with an abrasion-resistant surface in order, on the one hand, to be able to realize a long-term restoring force and, on the other hand, the smallest possible volume resistance. A long-term restoring force can be realized by a suitable spring material according to the mechanical properties. A smallest possible volume resistance can be achieved, for example, by means of an additional, suitable surface.

Fig. 4a shows a schematic view of another embodiment of an interface according to the invention, this time in the form of an angle plug. Fig. 4a clearly shows that an angular connector is realized by the injection molding of the housing 7, wherein the housing 7 integrates the likewise injection-molded screen element 6 in the overall shape during its shaping.

Fig. 4b shows a schematic view of another embodiment of an interface according to the invention in the form of an angle plug, wherein there is provided an electrically conductive locking unit in the form of locking lugs 10 and a directly molded-on shield element 6.

Fig. 4c shows a further embodiment of an interface according to the invention as a distributor in the form of an angle plug, where there is a metal insert 13 serves as a latching hook. The metal insert part 13 is integrated in the molded-on shield element 6.

Finally shows Fig. 5 in a schematic view of a distributor in the form of a Y-piece, where a total of three cables 2 are electrically coupled together. The interface comprises various functional elements, in the form of bridges 12, which are positioned over the injection-molded insulating body 5 and electrically isolated from each other. The free ends of the cable 2 are in the insulating body 5, which forms the interface body, integrated.

The insulating body 5 is surrounded on the whole by an injection-molded screen element 6, which contacts the respective shielding 1 of the cables 2 and binds them accordingly.

The outer shape is realized by the likewise injection-molded housing 7, namely an electrically insulating plastic material. The shape of the interface or the Y-piece is thus defined by injection molding, namely by the housing. 7

It should be understood that the above discussed embodiments are merely illustrative of the claimed teachings, but are not limited to the embodiments.

LIST OF REFERENCE NUMBERS

1

shielding

2

electric wire

3

Wire (of the cable)

4

electric contact

5

Insulating body, interface body

6

screen element

7

casing

8th

cable insulation

9

threaded ring

10

locking lug

11

feather

12

bridge

13

Metal insert

Claims (15)

1. Method for producing a preferably multipolar, shielded electrical interface, in particular a plug connection, preferably a plug, a socket, a Y-piece, T-piece or the like, comprising, in addition to the shielding (1), at least one cable (2) connected thereto, the interface comprising electrical contacts (4) and the cable (2) comprising wires (3) to be connected to the electrical contacts (4) and comprising shielding (1) surrounding the wires (3), which shielding is to be guided by the cable (2) to or into the interface, an electrically conductive composite material being injection-moulded around the shielding (1) of the cable (2) or the cables (2) and at least one region, adjacent to the shielding (1), around the electrical contacts (4), in order to form a shielding element (6),
   characterised in that the shielding element (6) is insulated from the electrical contacts (4) by integrating an insulating body (5) made of insulating plastics material,
   in that the insulating body (5) is produced by injection moulding around the contacts (4), the contacts (4) being integrated, at least in part by injection moulding, in the insulating body (5), and the insulating body (5) forming an interface body, and
   in that the electrically conductive composite material is injection moulded around the insulating body (5), in the form of the interface body, to form the shielding element (6).
2. Method according to claim 1, characterised in that the composite material comprises metal components and, after injection moulding, said composite material comprises a metal matrix or a metal dispersion that is consistent in the sense of a penetration structure.
3. Method according to either claim 1 or claim 2, characterised in that the composite material comprises a low-melting metal, preferably having a melting point of below 200 °C, and/or a preferably thermoplastic polymer having a processing temperature in the range of between 250 °C and 300 °C.
4. Method according to any one of claims 1 to 3, characterised in that the composite material comprises electrically conductive particles, in particular metal fibres and/or metal pellets.
5. Method according to any one of claims 1 to 4, characterised in that the cable (2) is manufactured by the end of the wires (3), in particular the strand contained in the wires (3), and the end of the shielding (1) being stripped, it being possible for the strands to be crimped or for an electrically conductive material to be injection-moulded around said strands in order to form the electrical contacts (4).
6. Method according to any one of claims 1 to 5, characterised in that the contacts (4) are integrated, at least in part by injection moulding, in the insulating body (5) that is made of plastics material, the insulating body (5) forming a plug/socket body.
7. Method according to any one of claims 1 to 6, characterised in that functional elements, such as engaging lugs, springs or the like, are integrated into the interface body during moulding thereof.
8. Method according to any one of claims 1 to 7, characterised in that an electrically insulating plastics material is injection-moulded around the cable (2) in front of or in the region of the shielding element (1) and around at least part of the shielding (1) forming the outer shape of the interface or the plug connection, i.e. forming a housing (7).
9. Method according to claim 8, characterised in that the housing (7) is injection-moulded in any shape, for example in the shape of a right-angle plug integrating part of the cable (2).
10. Method according to any one of claims 1 to 9, characterised in that the individual regions are injection-moulded successively.
11. Method according to any one of claims 1 to 10, characterised in that at least two different regions are injection-moulded simultaneously, for example in an over-moulding process.
12. Shielded electrical interface, in particular a plug connection, preferably a plug, socket, Y-piece, T-piece or the like, comprising, in addition to the shielding (1), at least one electrical cable (2) connected thereto, the interface comprising electrical contacts (4) and the cable (2) comprising wires/strands (3) to be connected to the electrical contacts (4) and comprising shielding (1) surrounding the wires (3), the shielding element (6) being formed by an electrically conductive composite material being injection-moulded around the shielding (1) of the cable (2) and at least one region, adjacent to the shielding (1), around the electrical contacts (4),
    characterised in that the shielding element (6) is insulated from the electrical contacts (4) by integrating an insulating body (5) made of insulating plastics material,
    in that the insulating body (5) is produced by injection moulding around the contacts (4), the contacts (4) being integrated, at least in part by injection moulding, into the insulating body (5), and the insulating body (5) forming an interface body, and
    in that the electrically conductive composite material is injection-moulded around the insulating body (5), in the form of the interface body, to form the shielding element (6).
13. Interface according to claim 12, characterised in that the composite material comprises metal components and, after injection moulding, comprises a metal matrix or a metal dispersion that is consistent in the sense of a penetration structure, it being possible for the composite material to comprise a low-melting metal, preferably having a melting point of below 200 °C, a preferably thermoplastic polymer having a processing temperature in the range of between 250 °C and 300 °C, and optionally additional electrically conductive components such as metal fibres and/or metal pellets.
14. Interface according to either claim 12 or claim 13, characterised in that the contacts are integrated, at least in part by injection moulding, in an insulating body (5), the insulating body (5) forming a plug/socket body, it being possible for functional elements, such as engaging lugs, springs or the like, to be integrated into the interface body (5).
15. Interface according to claim 14, characterised in that the interface body (5) forming the shielding element (6) is injection moulded at least in part, an electrically insulating plastics material being injection-moulded around the cable (2) in front of or in the region of the shielding element (6) and at least part of the shielding (1) forming the outer shape of the interface or the plug connection, i.e. forming a housing (7), and it being possible for the housing (7) to be injection-moulded in any shape.

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