EP0753863A1 - Manufacturing method of a core for flexible electrical cables - Google Patents

Manufacturing method of a core for flexible electrical cables Download PDF

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Publication number
EP0753863A1
EP0753863A1 EP96104780A EP96104780A EP0753863A1 EP 0753863 A1 EP0753863 A1 EP 0753863A1 EP 96104780 A EP96104780 A EP 96104780A EP 96104780 A EP96104780 A EP 96104780A EP 0753863 A1 EP0753863 A1 EP 0753863A1
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EP
European Patent Office
Prior art keywords
wires
insulation
wire
extruder
coated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP96104780A
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German (de)
French (fr)
Inventor
Manfred Dipl.-Ing. Obermeier
Ferdinand Ing. Grögl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nexans Deutschland GmbH
Original Assignee
Alcatel Kabel AG and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alcatel Kabel AG and Co filed Critical Alcatel Kabel AG and Co
Publication of EP0753863A1 publication Critical patent/EP0753863A1/en
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/0009—Details relating to the conductive cores
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables

Definitions

  • the invention relates to a method for producing a wire for flexible electrical cables, in which an electrical conductor consisting of several wires lying close together is extrusion-coated with insulation in an extruder (DE-AS 11 65 701).
  • Flexible electrical cables are, for example, data cables, connecting cables for electrical devices or connecting cables. Basically, it can be all cables or lines that should be easy to bend for winding, laying and use.
  • stranded conductors are used in known technology as conductors, which consist of a multiplicity of wires stranded together.
  • the stranded conductors are produced, for example, in accordance with the aforementioned DE-AS 11 65 701 in stranding or stranding machines.
  • Single-lay and double-lay machines are known in which stranded conductors can be manufactured at high speed. They are wound on spools during manufacture.
  • the stranded conductors are fed to an extruder in a later step in which insulation is sprayed onto them.
  • the production of cores is therefore relatively complex in previous technology. This is especially true when very thin wires have to be processed.
  • the invention has for its object to simplify the method described above.
  • This process does not require prefabrication of a stranded wire. Corresponding stranding or stranding machines are therefore not required.
  • the individual wires are only brought so close to one another in front of the extruder that they form the conductor to be encapsulated under mutual contact. Since the wires are only combined in parallel, they are not exposed to any significant mechanical stress. The method can therefore also be used with advantage for very thin wires.
  • the production of a wire is therefore significantly simplified overall compared to the previously used methods. Since the conductor of the wire consists of several wires that can be moved relative to each other, there is a wire that is easily bendable behind the extruder. The mechanical and electrical properties of this wire meet all requirements. The electrical values are even cheaper compared to a wire with a stranded conductor.
  • wires 2 are drawn off in the direction of arrow P from coils 3, which can be arranged rotatably in a frame G.
  • the wires 2 are preferably made of copper.
  • each coil 3 carries only one wire 2.
  • seven wires 2 are contained in one wire 1. They are summarized so that six wires 2 are arranged around a wire 2 referred to as core wire K. Less or more than seven wires 2 can also be used.
  • the wires 2 are combined in a fixed point 4 so that they are close to each other according to FIG. From the fixed point 4, a conductor 5 consisting of several wires 2 emerges, in which the wires 2 lie parallel to one another. After the wires 2 have been combined, the conductor 5 is fed directly to an extruder 6, in which an insulation 7 is injected around the latter.
  • the insulation 7 consists for example of polyethylene or polyvinyl chloride.
  • the finished core 1 can be wound on a spool or fed to a further processing station.
  • the wires 2 are individually wound onto the coils 3 in a preferred embodiment. As a result, they can be fed to fixed point 4 in a simple manner without substantial mechanical stress. It is also possible to regulate the pull-off force for each wire 2 individually or separately using known devices, so that all wires 2 are combined to form conductor 5 under the same conditions. In principle, this can also be achieved with somewhat more effort if two or more wires 2 are wound on a spool 3 and are pulled off the same together. However, the method works best when each coil 3 carries only one wire 2.
  • one of the wires 2 can be combined with one before Adhesion promoters are coated.
  • the core wire K is expediently used for this purpose.
  • the wire 2 to be coated is drawn through a bath 8 with liquid tin before the fixed point 4.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Of Electric Cables (AREA)
  • Processes Specially Adapted For Manufacturing Cables (AREA)
  • Insulated Conductors (AREA)

Abstract

The method involves spraying insulation (7) onto an electrical conductor consisting of several closely adjacent wires (2) in an extruder (6). The wires are drawn from spools (3) and combined together to run parallel to each other the fed directly to the extruder and sprayed with the insulation without any twisting whatsoever. Spools are used with only one wire wound onto each. At least one of the wires is coated with an adhesive before the wires are combined together. At least one of the wires can be passed through a bath (8) of liquid tin before the wires are combined.

Description

Die Erfindung bezieht sich auf ein Verfahren zur Herstellung einer Ader für flexible elektrische Kabel, bei welchem ein aus mehreren, dicht aneinander liegenden Drähten bestehender elektrischer Leiter in einem Extruder mit einer Isolierung umspritzt wird (DE-AS 11 65 701).The invention relates to a method for producing a wire for flexible electrical cables, in which an electrical conductor consisting of several wires lying close together is extrusion-coated with insulation in an extruder (DE-AS 11 65 701).

"Flexible elektrische Kabel" sind beispielsweise Datenkabel, Anschlußkabel für elektrische Geräte oder Verbindungskabel. Es können grundsätzlich alle Kabel oder auch Leitungen sein, die zum Aufspulen, beim Verlegen und beim Gebrauch gut biegbar sein sollen. Für die Adern dieser Kabel werden in bekannter Technik als Leiter sogenannte "Litzenleiter" eingesetzt, die aus einer Vielzahl von miteinander verlitzten (verseilten) Drähten bestehen. Die Litzenleiter werden beispielsweise entsprechend der oben erwähnten DE-AS 11 65 701 in Verseil- oder Verlitzmaschinen hergestellt. Es sind Einfachschlag- und Doppelschlagmaschinen bekannt, in denen Litzenleiter mit hoher Geschwindigkeit hergestellt werden können. Sie werden während der Herstellung auf Spulen aufgewickelt. Zur Erzeugung von Adern werden die Litzenleiter in einem späteren Arbeitsgang einem Extruder zugeführt, in dem eine Isolierung auf dieselben aufgespritzt wird. Die Herstellung von Adern ist in bisheriger Technik also relativ aufwendig. Das gilt insbesondere dann, wenn sehr dünne Drähte verarbeitet werden müssen."Flexible electrical cables" are, for example, data cables, connecting cables for electrical devices or connecting cables. Basically, it can be all cables or lines that should be easy to bend for winding, laying and use. For the wires of these cables, so-called "stranded conductors" are used in known technology as conductors, which consist of a multiplicity of wires stranded together. The stranded conductors are produced, for example, in accordance with the aforementioned DE-AS 11 65 701 in stranding or stranding machines. Single-lay and double-lay machines are known in which stranded conductors can be manufactured at high speed. They are wound on spools during manufacture. In order to create wires, the stranded conductors are fed to an extruder in a later step in which insulation is sprayed onto them. The production of cores is therefore relatively complex in previous technology. This is especially true when very thin wires have to be processed.

Der Erfindung liegt die Aufgabe zugrunde, das eingangs beschriebene Verfahren zu vereinfachen.The invention has for its object to simplify the method described above.

Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, daß die Drähte von Spulen abgezogen und parallel zueinander verlaufend zusammengefaßt sowie danach direkt dem Extruder zugeführt und ohne jedwede Verdrillung mit der Isolierung umspritzt werden.This object is achieved according to the invention in that the wires are drawn off the coils and combined parallel to one another and then fed directly to the extruder and extrusion-coated with the insulation without any twisting.

Dieses Verfahren kommt ohne Vorfertigung eines Litzenleiters aus. Entsprechende Verseil- oder Verlitzmaschinen werden also nicht benötigt. Die einzelnen Drähte werden vor dem Extruder lediglich so dicht aneinander gebracht, daß sie unter gegenseitiger Anlage den zu umspritzenden Leiter bilden. Da die Drähte parallel zueinander lediglich zusammengefaßt werden, sind sie keinen wesentlichen mechanischen Beanspruchungen ausgesetzt. Das Verfahren ist daher mit Vorteil auch für sehr dünne Drähte verwendbar. Die Herstellung einer Ader ist also insgesamt gegenüber den bisher angewendeten Verfahren wesentlich vereinfacht. Da der Leiter der Ader aus mehreren Drähten besteht, die relativ zueinander verschiebbar sind, liegt hinter dem Extruder eine gut biegbare Ader vor. Die mechanischen und elektrischen Eigenschaften dieser Ader entsprechen allen Anforderungen. Die elektrischen Werte sind gegenüber einer Ader mit Litzenleiter sogar günstiger.This process does not require prefabrication of a stranded wire. Corresponding stranding or stranding machines are therefore not required. The individual wires are only brought so close to one another in front of the extruder that they form the conductor to be encapsulated under mutual contact. Since the wires are only combined in parallel, they are not exposed to any significant mechanical stress. The method can therefore also be used with advantage for very thin wires. The production of a wire is therefore significantly simplified overall compared to the previously used methods. Since the conductor of the wire consists of several wires that can be moved relative to each other, there is a wire that is easily bendable behind the extruder. The mechanical and electrical properties of this wire meet all requirements. The electrical values are even cheaper compared to a wire with a stranded conductor.

Vorteilhafte Ausgestaltungen der Erfindung gehen aus den Unteransprüchen hervor.Advantageous embodiments of the invention emerge from the subclaims.

Das Verfahren nach der Erfindung wird anhand der Zeichnungen als Ausführungsbeispiel erläutert.The method according to the invention is explained with reference to the drawings as an embodiment.

Es zeigen:

  • Fig. 1 in schematischer Darstellung eine Vorrichtung zur Durchführung des Verfahrens nach der Erfindung.
  • Fig. 2 einen Querschnitt einer mit dem Verfahren hergestellten Ader.
Show it:
  • Fig. 1 shows a schematic representation of an apparatus for performing the method according to the invention.
  • Fig. 2 shows a cross section of a wire produced by the method.

Zur Herstellung einer flexiblen Ader 1, wie sie im Schnitt beispielsweise aus Fig. 2 hervorgeht, werden Drähte 2 in Richtung des Pfeiles P von Spulen 3 abgezogen, die drehbar in einem Gestell G angeordnet sein können. Die Drähte 2 bestehen vorzugsweise aus Kupfer. In bevorzugter Ausführungsform trägt jede Spule 3 nur einen Draht 2. In einer Ader 1 sind beispielsweise sieben Drähte 2 enthalten. Sie werden so zusammengefaßt, daß sechs Drähte 2 um einen als Kerndraht K bezeichneten Draht 2 herum angeordnet sind. Es können auch weniger oder mehr als sieben Drähte 2 eingesetzt werden.To produce a flexible core 1, as can be seen in the section, for example, from FIG. 2, wires 2 are drawn off in the direction of arrow P from coils 3, which can be arranged rotatably in a frame G. The wires 2 are preferably made of copper. In a preferred embodiment, each coil 3 carries only one wire 2. For example, seven wires 2 are contained in one wire 1. They are summarized so that six wires 2 are arranged around a wire 2 referred to as core wire K. Less or more than seven wires 2 can also be used.

Die Drähte 2 werden in einem Festpunkt 4 so zusammengefaßt, daß sie entsprechend Fig. 2 dicht aneinander liegen. Aus dem Festpunkt 4 tritt ein aus mehreren Drähten 2 bestehender Leiter 5 aus, in dem die Drähte 2 parallel zueinander liegen. Der Leiter 5 wird nach dem Zusammenfassen seiner Drähte 2 direkt einem Extruder 6 zugeführt, in dem eine Isolierung 7 um denselben herumgespritzt wird. Die Isolierung 7 besteht beispielsweise aus Polyethylen oder Polyvinylchlorid. Die fertige Ader 1 kann auf eine Spule aufgewickelt oder einer weiteren Bearbeitungsstation zugeführt werden.The wires 2 are combined in a fixed point 4 so that they are close to each other according to FIG. From the fixed point 4, a conductor 5 consisting of several wires 2 emerges, in which the wires 2 lie parallel to one another. After the wires 2 have been combined, the conductor 5 is fed directly to an extruder 6, in which an insulation 7 is injected around the latter. The insulation 7 consists for example of polyethylene or polyvinyl chloride. The finished core 1 can be wound on a spool or fed to a further processing station.

Die Drähte 2 sind - wie schon erwähnt - in bevorzugter Ausführungsform einzeln auf den Spulen 3 aufgewickelt. Sie können dadurch dem Festpunkt 4 auf einfache Weise ohne wesentliche mechanische Beanspruchung zugeführt werden. Es ist dabei auch möglich, die Abzugskraft für jeden Draht 2 unter Einsatz bekannter Geräte einzeln bzw. getrennt zu regeln, so daß alle Drähte 2 unter gleichen Bedingungen zum Leiter 5 zusammengefaßt werden. Das läßt sich prinzipiell mit etwas erhöhtem Aufwand zwar auch dann erreichen, wenn zwei oder mehr Drähte 2 auf einer Spule 3 aufgewickelt sind und gemeinsam von derselben abgezogen werden. Das Verfahren arbeitet jedoch dann am günstigsten, wenn jede Spule 3 nur einen Draht 2 trägt.As already mentioned, the wires 2 are individually wound onto the coils 3 in a preferred embodiment. As a result, they can be fed to fixed point 4 in a simple manner without substantial mechanical stress. It is also possible to regulate the pull-off force for each wire 2 individually or separately using known devices, so that all wires 2 are combined to form conductor 5 under the same conditions. In principle, this can also be achieved with somewhat more effort if two or more wires 2 are wound on a spool 3 and are pulled off the same together. However, the method works best when each coil 3 carries only one wire 2.

Um den Zusammenhalt der Drähte 2 im Leiter 5 zu verbessern, kann einer der Drähte 2 vor dem Zusammenfassen mit einem Haftvermittler beschichtet werden. Zweckmäßig wird dazu der Kerndraht K verwendet. In bevorzugter Ausführungsform wird der zu beschichtende Draht 2 vor dem Festpunkt 4 durch ein Bad 8 mit flüssigem Zinn gezogen.In order to improve the cohesion of the wires 2 in the conductor 5, one of the wires 2 can be combined with one before Adhesion promoters are coated. The core wire K is expediently used for this purpose. In a preferred embodiment, the wire 2 to be coated is drawn through a bath 8 with liquid tin before the fixed point 4.

Claims (5)

Verfahren zur Herstellung einer Ader für flexible elektrische Kabel, bei welchem ein aus mehreren, dicht aneinander liegenden Drähten bestehender elektrischer Leiter in einem Extruder mit einer Isolierung umspritzt wird, dadurch gekennzeichnet, daß die Drähte (2) von Spulen (3) abgezogen und parallel zueinander verlaufend zusammengefaßt sowie danach direkt dem Extruder (6) zugeführt und ohne jedwede Verdrillung mit der Isolierung (7) umspritzt werden.Method for producing a wire for flexible electrical cables, in which an electrical conductor consisting of several wires lying close together is extrusion-coated with insulation in an extruder, characterized in that the wires (2) are drawn off from coils (3) and parallel to one another summarized continuously and then fed directly to the extruder (6) and extrusion-coated with the insulation (7) without any twisting. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß Spulen (3) eingesetzt werden, auf denen jeweils nur ein Draht (2) aufgewickelt ist.Method according to claim 1, characterized in that coils (3) are used, on each of which only one wire (2) is wound. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß mindestens einer der Drähte (2) vor dem Zusammenfassen mit einem Haftvermittler beschichtet wird.A method according to claim 1 or 2, characterized in that at least one of the wires (2) is coated with an adhesion promoter before being combined. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß mindestens einer der Drähte (2) vor dem Zusammenfassen durch ein Bad (8) mit flüssigem Zinn gezogen wird.Method according to claim 1 or 2, characterized in that at least one of the wires (2) is drawn through a bath (8) with liquid tin before being combined. Mit dem Verfahren nach Anspruch 1 hergestellte Ader mit einem mehrere Drähte aufweisenden elektrischen Leiter, dadurch gekennzeichnet, daß die Drähte (2) des Leiters (5) über ihre ganze Länge parallel zueinander liegend in eine Isolierung (7) eingebettet sind.Core produced by the method according to claim 1, having an electrical conductor having a plurality of wires, characterized in that the wires (2) of the conductor (5) are embedded in an insulation (7) lying parallel to one another over their entire length.
EP96104780A 1995-07-10 1996-03-26 Manufacturing method of a core for flexible electrical cables Withdrawn EP0753863A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19525053 1995-07-10
DE1995125053 DE19525053A1 (en) 1995-07-10 1995-07-10 Process for producing a wire for flexible electrical cables

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EP0753863A1 true EP0753863A1 (en) 1997-01-15

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EP96104780A Withdrawn EP0753863A1 (en) 1995-07-10 1996-03-26 Manufacturing method of a core for flexible electrical cables

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JP (1) JPH0935555A (en)
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2762335A1 (en) * 1997-04-21 1998-10-23 3 C Components Stranded electric cable
CN102403073A (en) * 2011-11-21 2012-04-04 安徽蓝德集团股份有限公司 Method for producing insulating wire core of cable

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2430073A1 (en) * 1978-06-26 1980-01-25 Renault Ind Belgique Sa Multicore cable prodn. machine - has multiple wire drawing unit feeding several conductors into insulation extrusion system
GB2027083A (en) * 1978-07-14 1980-02-13 Siemens Ag Electrical, Multicore Flexible Sheathed Cable

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3342810A1 (en) * 1983-11-24 1985-06-05 Siemens AG, 1000 Berlin und 8000 München Process for producing a multi-wire flexible electrical line
DE4038040A1 (en) * 1990-11-29 1992-06-04 Kabelmetal Electro Gmbh Registering and marking insulation faults in electric cable mfg. - involves marking defects on cable core with iron pins while production continues

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2430073A1 (en) * 1978-06-26 1980-01-25 Renault Ind Belgique Sa Multicore cable prodn. machine - has multiple wire drawing unit feeding several conductors into insulation extrusion system
GB2027083A (en) * 1978-07-14 1980-02-13 Siemens Ag Electrical, Multicore Flexible Sheathed Cable

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2762335A1 (en) * 1997-04-21 1998-10-23 3 C Components Stranded electric cable
CN102403073A (en) * 2011-11-21 2012-04-04 安徽蓝德集团股份有限公司 Method for producing insulating wire core of cable

Also Published As

Publication number Publication date
JPH0935555A (en) 1997-02-07
DE19525053A1 (en) 1997-01-16

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