EP0749130A1 - Electrical transmission cable of high frequency signals and manufacturing method of the cable - Google Patents
Electrical transmission cable of high frequency signals and manufacturing method of the cable Download PDFInfo
- Publication number
- EP0749130A1 EP0749130A1 EP96401257A EP96401257A EP0749130A1 EP 0749130 A1 EP0749130 A1 EP 0749130A1 EP 96401257 A EP96401257 A EP 96401257A EP 96401257 A EP96401257 A EP 96401257A EP 0749130 A1 EP0749130 A1 EP 0749130A1
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- EP
- European Patent Office
- Prior art keywords
- assembly
- conductors
- cable
- tape
- tightening
- 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.)
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Classifications
-
- 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
- H01B13/0016—Apparatus or processes specially adapted for manufacturing conductors or cables for heat treatment
-
- 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
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1805—Protections not provided for in groups H01B7/182 - H01B7/26
Definitions
- the present invention relates to an electrical cable for transmitting high frequency signals, which is in particular intended for use in the computer field for the transmission of high frequency data signals, ranging in particular from 16 to 300 MHz. It also relates to the process for manufacturing such a cable.
- Such a cable comprises in known manner at least one assembly consisting of individually insulated conductors, a screen for shielding each assembly and an outer sheath for protecting the cable.
- Each assembly consisting of conductors is advantageously formed of several pairs of conductors. The conductors of each pair are twisted with regular and short pitch, of different value for the different pairs of the same set, and the pairs of this set are assembled.
- each assembly made up of conductors which it comprises, to preserve the characteristics of transmission of the individual pairs along the cable.
- the pairs of the assembly consisting of conductors are kept assembled by an insulating clamping tape wound at very short pitch around the assembly constituted and / or by an insulating sheath surrounding the assembly assembled, before putting in place shielding screen.
- the tightening tapes conventionally used are made of polyester, polyethylene polypropylene, or the like and have a high mechanical resistance and a certain elasticity.
- Such a ribbon placed very taut and very tight on the assembled assembly exerts a very strong tangential pressure on the generatrices of the cable during its installation and tends to displace the conductors and deform the pairs and therefore the assembly geometry of the pairs of l 'together constituted. If, on the other hand, it is placed too loose, it does not maintain the assembly sufficiently.
- the correct or correct adjustment of the ribbon tension is very difficult to control, in order to obtain satisfactory maintenance of the assembly without deformation of the geometry of the assembly formed.
- Document EP-A-0 568 048 discloses a data transmission cable, the assembly of which comprises conductors comprises two pairs of insulated conductors assembled in a quarter star, which are held together by an internal insulating sheath and / or a plastic tape then directly around the quarter.
- This cable also includes a screen for shielding the fourth and an external protective sheath for the cable.
- the use of the plastic tape alone gives rise to the delicate problem raised above of adjusting its laying tension for the satisfactory maintenance of the quarter without displacement of the conductors and resulting deformation of the assembly.
- the use of the internal sheath on the plastic tape strengthens the action of the aforementioned tape and allows the installation of this tape without very significant tightening to avoid displacement of the conductors, but corresponds to an additional operation in the manufacture of the cable.
- the object of the present invention is to produce an electric cable for transmitting high-frequency signals, in which the behavior of the assembly of the conductors of each assembled assembly is improved, thereby avoiding deforming the assembly and minimizing the cable manufacturing operations.
- a high frequency signal transmission cable comprising at least one assembly consisting of electrical conductors, individually insulated and assembled with a geometrical regularity of assembly of the conductors of each assembly, and a tightening tape of the conductors of each assembly for maintaining their assembly geometry, characterized in that said tightening tape is a tape made of heat-shrinkable material, helically wound continuously without tightening around each assembly and constricted thereon.
- a high frequency signal transmission cable comprising at least one assembly consisting of electrical conductors, individually insulated, assembled with a geometric regularity of assembly in each assembly and kept assembled by a tightening tape mounted around each set made up of conductors, characterized in that it consists in depositing just tightly helically but without tightening said strip chosen from heat-shrinkable material on the periphery and along said set made up and thermally shrinking it over any the periphery of said assembly, for the resulting holding of the assembly without deforming the assembly geometry of said assembly.
- this method consists in shrinking said strip by hot air received on the periphery of the strip in place but not tightened on the assembly made up of conductors.
- said ribbon is shrunk in line, directly after its installation on the assembly formed.
- This single figure is a sectional view of an electric cable for transmitting high frequency signals, according to the invention.
- This cable comprises four pairs of electrical conductors 1 to 4, the conductors of each pair of which are denoted 1A and 1B to 4A and 4B according to the corresponding pair.
- These electrical conductors are individually insulated and identical to each other, each electrical conductor such as 1A comprising a conductor central 5 and insulation 6 on its central conductor.
- the conductors of each pair are stranded with regular and short pitch, of different value for the four pairs.
- the pairs are grouped and assembled into a set consisting of conductors.
- the cable comprises a tightening tape 7 of the assembly consisting of conductors, which maintains the assembly geometry of the pairs.
- This tightening tape 7 is chosen from insulating and heat-shrinkable material. It is initially thermally expanded. It is placed just taut but without tightening around the assembly consisting of conductors to completely cover it and is immediately shrunk over the entire periphery of the assembly constituted for a strong tightening of the conductors.
- This heat-shrinkable tape installed without tightening tension does not deform the geometry of the assembly formed during this installation. During and after its thermal shrinkage, it exerts an identical clamping pressure over the entire periphery of the assembled assembly, to ensure excellent retention of the assembly without deforming it due to the simultaneous distribution of the mechanical clamping forces over its entire periphery.
- This ribbon is placed in a helix, just stretched and without tightening, around the assembly consisting of conductors over the length of this assembly as soon as the pairs are assembled. Its shrinkage is achieved by hot air received on the periphery of the ribbon in place or by the heat of a suitable source, which is distributed over the periphery of the ribbon in place. It is carried out as soon as the ribbon is put in place, on the cable manufacturing line.
- a ground continuity wire 8 is laid lengthwise on the constricted tightening tape and a shielding screen 9 is mounted around the tightening tape and the ground continuity wire.
- An outer protective sheath 10 covers the shielding screen.
- the assembly consisting of conductors may comprise a number of pairs different from that indicated above. Each pair can itself be coated with a tightening tape, of the conventional type or made of heat-shrinkable material and then shrunk before being assembled with each other pair of the same set. It is also indicated that, as a variant, the cable according to the invention may comprise several assemblies consisting of conductors, in particular two identical assemblies, a strip of heat-shrinkable material for stable maintenance of the assembly of the conductors of each assembly, a shielding screen of each assembly and an extruded sheath of common external protection of the individually shielded assemblies.
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Communication Cables (AREA)
- Insulated Conductors (AREA)
Abstract
Description
La présente invention porte sur un câble électrique de transmission de signaux à haute fréquence, qui est en particulier destiné à être utilisé dans le domaine informatique pour la transmission de signaux de données à fréquence élevée, allant notamment de 16 à 300 MHz. Elle porte également sur le procédé de fabrication d'un tel câble.The present invention relates to an electrical cable for transmitting high frequency signals, which is in particular intended for use in the computer field for the transmission of high frequency data signals, ranging in particular from 16 to 300 MHz. It also relates to the process for manufacturing such a cable.
Un tel câble comporte de manière connue au moins un ensemble constitué de conducteurs isolés individuellement, un écran de blindage de chaque ensemble et une gaine extérieure de protection du câble. Chaque ensemble constitué de conducteurs est avantageusement formé de plusieurs paires de conducteurs. Les conducteurs de chaque paire sont torsadés à pas régulier et court, de valeur différente pour les différentes paires du même ensemble, et les paires de cet ensemble sont assemblées.Such a cable comprises in known manner at least one assembly consisting of individually insulated conductors, a screen for shielding each assembly and an outer sheath for protecting the cable. Each assembly consisting of conductors is advantageously formed of several pairs of conductors. The conductors of each pair are twisted with regular and short pitch, of different value for the different pairs of the same set, and the pairs of this set are assembled.
L'utilisation à fréquence élevée du câble nécessite une très grande régularité de la géométrie de chaque ensemble constitué de conducteurs qu'il comporte, pour conserver les caractéristiques de transmission des paires individuelles le long du câble. A cet effet, les paires de l'ensemble constitué de conducteurs sont maintenues assemblées par un ruban isolant de serrage enroulé à pas très court autour de l'ensemble constitué et/ou par une gaine isolante entourant l'ensemble constitué, avant la mise en place de l'écran de blindage.The high frequency use of the cable requires very regularity of the geometry of each assembly made up of conductors which it comprises, to preserve the characteristics of transmission of the individual pairs along the cable. To this end, the pairs of the assembly consisting of conductors are kept assembled by an insulating clamping tape wound at very short pitch around the assembly constituted and / or by an insulating sheath surrounding the assembly assembled, before putting in place shielding screen.
Les rubans de serrage utilisés classiquement sont en polyester, polyéthylène polypropylène, ou analogue et présentent une grande résistance mécanique et une certaine élasticité. Un tel ruban posé très tendu et très serré sur l'ensemble constitué exerce une très forte pression tangentielle sur les génératrices du câble lors de sa pose et tend à déplacer les conducteurs et déformer les paires et donc la géométrie d'assemblage des paires de l'ensemble constitué. Si par contre il est posé trop lâche, il ne maintient pas suffisamment l'assemblage. En pratique, le juste ou bon réglage de la tension du ruban est très difficile à contrôler, pour obtenir le maintien satisfaisant de l'assemblage sans déformation de la géométrie de l'ensemble constitué.The tightening tapes conventionally used are made of polyester, polyethylene polypropylene, or the like and have a high mechanical resistance and a certain elasticity. Such a ribbon placed very taut and very tight on the assembled assembly exerts a very strong tangential pressure on the generatrices of the cable during its installation and tends to displace the conductors and deform the pairs and therefore the assembly geometry of the pairs of l 'together constituted. If, on the other hand, it is placed too loose, it does not maintain the assembly sufficiently. In practice, the correct or correct adjustment of the ribbon tension is very difficult to control, in order to obtain satisfactory maintenance of the assembly without deformation of the geometry of the assembly formed.
Le document EP-A-0 568 048 divulgue un câble de transmission de données dont l'ensemble constitué de conducteurs comporte deux paires de conducteurs isolés assemblés en quarte étoile, qui sont maintenues assemblées par une gaine isolante interne et/ou un ruban de plastique alors directement autour de la quarte. Ce câble comporte en outre un écran de blindage de la quarte et une gaine de protection extérieure du câble.Document EP-A-0 568 048 discloses a data transmission cable, the assembly of which comprises conductors comprises two pairs of insulated conductors assembled in a quarter star, which are held together by an internal insulating sheath and / or a plastic tape then directly around the quarter. This cable also includes a screen for shielding the fourth and an external protective sheath for the cable.
L'utilisation du ruban de plastique seul donne lieu au problème délicat soulevé ci-avant de réglage de sa tension de pose pour le maintien satisfaisant de la quarte sans déplacement des conducteurs et déformation résultante de l'assemblage. L'utilisation de la gaine interne sur le ruban de plastique renforce l'action du ruban précité et permet la pose de ce ruban sans serrage très important pour éviter le déplacement des conducteurs, mais correspond à une opération supplémentaire dans la fabrication du câble.The use of the plastic tape alone gives rise to the delicate problem raised above of adjusting its laying tension for the satisfactory maintenance of the quarter without displacement of the conductors and resulting deformation of the assembly. The use of the internal sheath on the plastic tape strengthens the action of the aforementioned tape and allows the installation of this tape without very significant tightening to avoid displacement of the conductors, but corresponds to an additional operation in the manufacture of the cable.
La présente invention a pour but de réaliser un câble électrique de transmission de signaux à haute fréquence, dans lequel la tenue de l'assemblage des conducteurs de chaque ensemble constitué se trouve améliorée, en évitant pour autant de déformer l'assemblage et en minimisant les opérations de fabrication du câble.The object of the present invention is to produce an electric cable for transmitting high-frequency signals, in which the behavior of the assembly of the conductors of each assembled assembly is improved, thereby avoiding deforming the assembly and minimizing the cable manufacturing operations.
Elle a pour objet un câble de transmission de signaux à haute fréquence, comportant au moins un ensemble constitué de conducteurs électriques, isolés individuellement et assemblés en présentant une régularité géométrique d'assemblage des conducteurs de chaque ensemble, et un ruban de serrage des conducteurs de chaque ensemble pour le maintien de leur géométrie d'assemblage, caractérisé en ce que ledit ruban de serrage est un ruban en matière thermorétractable, enroulé hélicoïdalement en continu sans serrage autour de chaque ensemble et rétreint sur celui-ci.It relates to a high frequency signal transmission cable, comprising at least one assembly consisting of electrical conductors, individually insulated and assembled with a geometrical regularity of assembly of the conductors of each assembly, and a tightening tape of the conductors of each assembly for maintaining their assembly geometry, characterized in that said tightening tape is a tape made of heat-shrinkable material, helically wound continuously without tightening around each assembly and constricted thereon.
Elle a également pour objet un procédé de fabrication d'un câble de transmission de signaux à haute fréquence, comportant au moins un ensemble constitué de conducteurs électriques, isolés individuellement, assemblés en présentant une régularité géométrique d'assemblage dans chaque ensemble et maintenus assemblés par un ruban de serrage monté autour de chaque ensemble constitué de conducteurs, caractérisé en ce qu'il consiste à déposer hélicoïdalement juste tendu mais sans serrage ledit ruban choisi en matière thermorétractable sur la périphérie et le long dudit ensemble constitué et à le rétreindre thermiquement sur toute la périphérie dudit ensemble, pour la tenue résultante de l'assemblage sans déformer la géométrie d'assemblage dudit ensemble.It also relates to a method of manufacturing a high frequency signal transmission cable, comprising at least one assembly consisting of electrical conductors, individually insulated, assembled with a geometric regularity of assembly in each assembly and kept assembled by a tightening tape mounted around each set made up of conductors, characterized in that it consists in depositing just tightly helically but without tightening said strip chosen from heat-shrinkable material on the periphery and along said set made up and thermally shrinking it over any the periphery of said assembly, for the resulting holding of the assembly without deforming the assembly geometry of said assembly.
En particulier en outre selon l'invention, ce procédé consiste à réaliser la rétreinte dudit ruban par de l'air chaud reçu sur la périphérie du ruban en place mais non serré sur l'ensemble constitué de conducteurs.In particular, furthermore, according to the invention, this method consists in shrinking said strip by hot air received on the periphery of the strip in place but not tightened on the assembly made up of conductors.
Avantageusement aussi, ledit ruban est rétreint en ligne, directement à l'issue de sa mise en place sur l'ensemble constitué.Advantageously also, said ribbon is shrunk in line, directly after its installation on the assembly formed.
Les caractéristiques et avantages de la présente invention ressortiront de la description donnée ci-après en regard du mode de réalisation illustré à titre d'exemple dans la figure unique du dessin ci-annexé.The characteristics and advantages of the present invention will emerge from the description given below with regard to the embodiment illustrated by way of example in the single figure of the attached drawing.
Cette figure unique est une vue en coupe d'un câble électrique de transmission de signaux à haute fréquence, selon l'invention. Ce câble comporte quatre paires de conducteurs électriques 1 à 4, dont les conducteurs de chaque paire sont notés 1A et 1B à 4A et 4B selon la paire correspondante. Ces conducteurs électriques sont isolés individuellement et identiques les uns aux autres, chaque conducteur électrique tel que 1A comprenant un conducteur central 5 et une isolation 6 sur son conducteur central. Les conducteurs de chaque paire sont toronnés à pas régulier et court, de valeur différente pour les quatre paires. Les paires sont regroupées et assemblées en un ensemble constitué de conducteurs.This single figure is a sectional view of an electric cable for transmitting high frequency signals, according to the invention. This cable comprises four pairs of electrical conductors 1 to 4, the conductors of each pair of which are denoted 1A and 1B to 4A and 4B according to the corresponding pair. These electrical conductors are individually insulated and identical to each other, each electrical conductor such as 1A comprising a conductor central 5 and
Le câble comporte un ruban de serrage 7 de l'ensemble constitué de conducteurs, qui maintient la géométrie d'assemblage des paires. Ce ruban de serrage 7 est choisi en matière isolante et thermorétractable. Il est au départ expansé thermiquement. Il est posé juste tendu mais sans serrage autour de l'ensemble constitué de conducteurs pour le recouvrir entièrement et est aussitôt rétreint sur toute la périphérie de l'ensemble constitué pour un fort serrage des conducteurs. Ce ruban thermorétractable posé sans tension de serrage ne déforme pas la géométrie de l'ensemble constitué, au cours de cette pose. Il exerce au cours et après sa rétreinte thermique une pression de serrage identique sur toute la périphérie de l'ensemble constitué, pour assurer un excellent maintien de l'assemblage sans le déformer du fait de la répartition simultanée des efforts mécaniques de serrage sur toute sa périphérie.The cable comprises a
Ce ruban est posé en hélice, juste tendu et sans serrage, autour de l'ensemble constitué de conducteurs sur la longueur de cet ensemble dès l'assemblage des paires. Sa rétreinte est réalisée par de l'air chaud reçu sur la périphérie du ruban en place ou par la chaleur d'une source convenable, qui se répartit sur la périphérie du ruban en place. Elle est réalisée dès la mise en place du ruban, sur la ligne de fabrication du câble.This ribbon is placed in a helix, just stretched and without tightening, around the assembly consisting of conductors over the length of this assembly as soon as the pairs are assembled. Its shrinkage is achieved by hot air received on the periphery of the ribbon in place or by the heat of a suitable source, which is distributed over the periphery of the ribbon in place. It is carried out as soon as the ribbon is put in place, on the cable manufacturing line.
Un fil de continuité de masse 8 est posé en long sur le ruban de serrage rétreint et un écran de blindage 9 est monté autour du ruban de serrage et du fil de continuité de masse. Une gaine de protection extérieure 10 recouvre l'écran de blindage.A ground continuity wire 8 is laid lengthwise on the constricted tightening tape and a
Dans ce câble selon l'invention, la régularité et la stabilité de l'assemblage sont parfaitement maîtrisées sur toute la longueur du câble.In this cable according to the invention, the regularity and stability of the assembly are perfectly controlled over the entire length of the cable.
En variante par rapport au câble illustré et décrit ci-avant, l'ensemble constitué de conducteurs peut comporter un nombre de paires différent de celui indiqué précédemment. Chaque paire peut elle-même être revêtue d'un ruban de serrage, de type classique ou en matériau thermorétractable et alors rétreint avant son assemblage avec chaque autre paire du même ensemble. On indique également qu'en variante le câble selon l'invention peut comporter plusieurs ensembles constitués de conducteurs, en particulier deux ensembles identiques, un ruban en matière thermorétractable de maintien stable de l'assemblage des conducteurs de chaque ensemble, un écran de blindage de chaque ensemble et une gaine extrudée de protection extérieure commune des ensembles individuellement blindés.As a variant with respect to the cable illustrated and described above, the assembly consisting of conductors may comprise a number of pairs different from that indicated above. Each pair can itself be coated with a tightening tape, of the conventional type or made of heat-shrinkable material and then shrunk before being assembled with each other pair of the same set. It is also indicated that, as a variant, the cable according to the invention may comprise several assemblies consisting of conductors, in particular two identical assemblies, a strip of heat-shrinkable material for stable maintenance of the assembly of the conductors of each assembly, a shielding screen of each assembly and an extruded sheath of common external protection of the individually shielded assemblies.
Claims (4)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9507148 | 1995-06-15 | ||
| FR9507148A FR2735605B1 (en) | 1995-06-15 | 1995-06-15 | HIGH FREQUENCY SIGNAL TRANSMISSION ELECTRIC CABLE AND METHOD FOR MANUFACTURING THE CABLE |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0749130A1 true EP0749130A1 (en) | 1996-12-18 |
Family
ID=9480031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96401257A Withdrawn EP0749130A1 (en) | 1995-06-15 | 1996-06-11 | Electrical transmission cable of high frequency signals and manufacturing method of the cable |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0749130A1 (en) |
| FR (1) | FR2735605B1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7923638B2 (en) | 2001-06-14 | 2011-04-12 | Prysmian Telecom Cables & Systems Australia Pty Ltd | Communications cable provided with a crosstalk barrier for use at high transmission frequencies |
| CN102364585A (en) * | 2011-10-25 | 2012-02-29 | 江苏亨通线缆科技有限公司 | Low-voltage remote power supply cable for high-speed Ethernet switch |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0326928A1 (en) * | 1988-02-04 | 1989-08-09 | DSG Schrumpfschlauch GmbH | Method and device for sectionally sheathing objects with plastic |
| DE9205694U1 (en) * | 1992-04-28 | 1992-07-30 | Dätwyler AG Kabel und Systeme, Altdorf | Data transfer cable |
-
1995
- 1995-06-15 FR FR9507148A patent/FR2735605B1/en not_active Expired - Fee Related
-
1996
- 1996-06-11 EP EP96401257A patent/EP0749130A1/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0326928A1 (en) * | 1988-02-04 | 1989-08-09 | DSG Schrumpfschlauch GmbH | Method and device for sectionally sheathing objects with plastic |
| DE9205694U1 (en) * | 1992-04-28 | 1992-07-30 | Dätwyler AG Kabel und Systeme, Altdorf | Data transfer cable |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7923638B2 (en) | 2001-06-14 | 2011-04-12 | Prysmian Telecom Cables & Systems Australia Pty Ltd | Communications cable provided with a crosstalk barrier for use at high transmission frequencies |
| CN102364585A (en) * | 2011-10-25 | 2012-02-29 | 江苏亨通线缆科技有限公司 | Low-voltage remote power supply cable for high-speed Ethernet switch |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2735605B1 (en) | 1997-07-11 |
| FR2735605A1 (en) | 1996-12-20 |
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