EP0905717A1 - Device for coating a solid lubricant on a cable - Google Patents

Device for coating a solid lubricant on a cable Download PDF

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Publication number
EP0905717A1
EP0905717A1 EP98402348A EP98402348A EP0905717A1 EP 0905717 A1 EP0905717 A1 EP 0905717A1 EP 98402348 A EP98402348 A EP 98402348A EP 98402348 A EP98402348 A EP 98402348A EP 0905717 A1 EP0905717 A1 EP 0905717A1
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EP
European Patent Office
Prior art keywords
cable
lubricant
sheath
core
coating
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Withdrawn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
EP98402348A
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German (de)
French (fr)
Inventor
Jean-Pierre Bonicel
Olivier Tatat
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.)
Alcatel CIT SA
Alcatel Lucent SAS
Original Assignee
Alcatel CIT SA
Alcatel SA
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 CIT SA, Alcatel SA filed Critical Alcatel CIT SA
Publication of EP0905717A1 publication Critical patent/EP0905717A1/en
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    • 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
    • H01B13/06—Insulating conductors or cables
    • H01B13/14—Insulating conductors or cables by extrusion
    • H01B13/145—Pretreatment or after-treatment

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Physical Vapour Deposition (AREA)
  • Electric Cable Installation (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

A film of lubricant film is deposited onto an extruded cable sheath by spraying in the plasma phase (sputtering). A unit comprising an extruder (20) for forming a sheath on the core (10) of a cable; a station with a chamber (21) in which a lubricant is applied to the cable by spraying in the plasma phase (sputtering); and a cooling cell (22). An Independent claim is included for the process of forming a lubricant coating on extruded cable sheath by sputtering using an apparatus as shown.

Description

La présente invention concerne un dispositif pour déposer un lubrifiant solide sur un câble, un tel câble étant prévu pour être installé dans une conduite tubulaire.The present invention relates to a device for depositing a lubricant solid on a cable, such a cable being intended to be installed in a pipe tubular.

Dans de nombreux domaines d'application et notamment en télécommunications, les câbles électriques ou à fibres optiques sont introduits dans des conduites. Il convient donc de minimiser le coefficient de frottement de ces câbles sur les parois internes des conduites.In many fields of application and in particular in telecommunications, electrical or fiber optic cables are introduced in pipes. It is therefore advisable to minimize the coefficient of friction of these cables on the internal walls of the pipes.

Une première solution connue figure dans le brevet français FR-2 674 364. Dans ce document, l'âme d'un câble passe par une première extrudeuse pour application d'une gaine conventionnelle qui est souvent en polyéthylène. L'âme gainée passe ensuite dans une seconde extrudeuse pour application d'une couche lubrifiante composite telle qu'un alliage polyéthylène-résine silicone. Le câble ainsi lubrifié passe enfin, de manière connue, dans un bac de refroidissement.A first known solution appears in the French patent FR-2 674 364. In this document, the core of a cable passes through a first extruder for application of a conventional sheath which is often in polyethylene. The sheathed core then passes through a second extruder to application of a composite lubricating layer such as a polyethylene-resin alloy silicone. The cable thus lubricated finally passes, in a known manner, into a cooling tank.

Une deuxième solution connue figure dans la demande de brevet allemand DE-44 10 456. On prévoit ici, comme dans le premier document, une extrudeuse pour revêtir l'âme du câble d'une gaine. A la suite de cette extrudeuse est disposée une chambre d'enduction pour appliquer sur la gaine encore chaude des granulés en matière dure, ces granulés devant se détacher lors de l'introduction du câble dans la conduite. Finalement, le câble enduit traverse un bac de refroidissement.A second known solution appears in the patent application German DE-44 10 456. We provide here, as in the first document, a extruder to cover the cable core with a sheath. As a result of this an extruder is provided with a coating chamber for applying to the sheath still hot granules of hard material, these granules must come off when introducing the cable into the pipe. Finally, the coated cable through a cooling tank.

Ces deux solutions sont difficiles à mettre en oeuvre et ne permettent pas d'obtenir une très bonne homogénéité du matériau lubrifiant.These two solutions are difficult to implement and do not allow not to obtain very good homogeneity of the lubricating material.

La présente invention a ainsi pour objet un dispositif qui pallie cette imperfection.The present invention thus relates to a device which overcomes this imperfection.

L'invention concerne donc un dispositif comportant une extrudeuse pour réaliser une gaine sur l'âme d'un câble, un organe de dépôt d'un matériau lubrifiant sur ce câble et un bac de refroidissement, cet organe de dépôt étant une enceinte de pulvérisation en phase plasma.The invention therefore relates to a device comprising an extruder for make a sheath on the core of a cable, a material deposition member lubricant on this cable and a cooling tank, this depositing member being a plasma phase spray enclosure.

De préférence, le matériau lubrifiant est à base de polytetrafluoroéthylène ou alors ce matériau lubrifiant est inorganique.Preferably, the lubricant material is based on polytetrafluoroethylene or this lubricating material is inorganic.

L'invention concerne également un procédé pour réaliser un revêtement lubrifiant sur un câble comprenant une étape d'extrusion d'une gaine sur l'âme de ce câble, un étape de dépôt d'un matériau lubrifiant sur ce câble et une étape de refroidissement, procédé dans lequel cette étape de dépôt consiste en une pulvérisation en phase plasma. The invention also relates to a method for producing a coating. lubricant on a cable comprising a step of extruding a sheath on the core of this cable, a step of depositing a lubricating material on this cable and a cooling step, process in which this deposition step consists of plasma phase spraying.

L'invention apparaítra maintenant de manière plus précise dans le cadre de la description qui suit d'exemples de mise en oeuvre donnés à titre illustratif en se référant à la figure unique annexée qui représente un schéma du dispositif.The invention will now appear more precisely in the part of the following description of examples of implementation given as illustrative with reference to the single appended figure which represents a diagram of the device.

En référence à cette figure, une extrudeuse 20 réalise la gaine du câble 11 sur l'âme 10 de ce câble. A titre d'exemple, l'âme d'un câble à fibres optiques est souvent constituée d'un jonc à porteur central, les fibres étant disposées dans des rainures hélicoïdales ménagées sur la périphérie du jonc. Cette gaine est par exemple en polyéthylène.With reference to this figure, an extruder 20 produces the cable sheath 11 on the core 10 of this cable. For example, the core of a fiber cable often consists of a central carrier rod, the fibers being arranged in helical grooves formed on the periphery of the rod. This sheath is for example made of polyethylene.

Comme déjà mentionné, les chambres de dépôt connues dans ce type d'applications sont difficiles à mettre en oeuvre pour maítriser la quantité ou l'épaisseur du matériau déposé.As already mentioned, the known chambers of deposit in this type applications are difficult to implement to control the quantity or the thickness of the material deposited.

Ainsi, à la sortie de cette extrudeuse 20, le câble 11 est introduit dans un organe de dépôt 21 pour revêtir la gaine d'une couche de matériau lubrifiant. Cet organe 21 prend la forme d'une chambre de pulvérisation en phase plasma, technique connue sous le terme de "sputtering" en langage anglo-saxon.Thus, at the outlet of this extruder 20, the cable 11 is introduced into a deposition member 21 for coating the sheath with a layer of material lubricant. This member 21 takes the form of a spray chamber in plasma phase, technique known as "sputtering" in language Anglo-Saxon.

Le matériau lubrifiant présente un très faible coefficient de frottement vis à vis de la surface interne de la conduite dans laquelle le câble doit être engagé. Les produits à base de polytetrafluoroéthylène sont bien connus pour une telle caractéristique mécanique et ils conviennent donc bien dans le cas présent. On peut également choisir un matériau inorganique.The lubricating material has a very low coefficient of friction with respect to the internal surface of the pipe in which the cable is to be engaged. Polytetrafluoroethylene products are well known for such a mechanical characteristic and they are therefore well suited in the case present. One can also choose an inorganic material.

Le câble 11 est ensuite refroidi dans un bac de refroidissement 22.The cable 11 is then cooled in a cooling tank 22.

L'invention ne se limite pas aux exemples de réalisations décrits ci-dessus. En particulier, il est possible de remplacer tout moyen par un moyen équivalent.The invention is not limited to the examples of embodiments described above. In particular, it is possible to replace any means by a means equivalent.

Claims (6)

Dispositif comportant une extrudeuse (20) pour réaliser une gaine sur l'âme (10) d'un câble, un organe de dépôt (21) d'un matériau lubrifiant sur ce câble et un bac de refroidissement (22),
caractérisé en ce que ledit organe de dépôt est une enceinte de pulvérisation en phase plasma.Device comprising an extruder (20) for producing a sheath on the core (10) of a cable, a depositing member (21) of a lubricating material on this cable and a cooling tank (22),
characterized in that said deposition member is a plasma phase spray enclosure. Dispositif selon la revendication 1, caractérisé en ce que ledit matériau lubrifiant est à base de polytetrafluoroéthylène.Device according to claim 1, characterized in that said material lubricant is based on polytetrafluoroethylene. Dispositif selon la revendication 1, caractérisé en ce que ledit matériau lubrifiant est inorganique.Device according to claim 1, characterized in that said material lubricant is inorganic. Procédé pour réaliser un revêtement lubrifiant sur un câble comprenant une étape d'extrusion (20) d'une gaine sur l'âme (10) de ce câble (11), un étape de dépôt (21) d'un matériau lubrifiant sur ce câble et une étape de refroidissement (22), caractérisé en ce que ladite étape de dépôt consiste en une pulvérisation en phase plasma.Method for producing a lubricant coating on a cable comprising a extrusion step (20) of a sheath on the core (10) of this cable (11), a step depositing (21) a lubricating material on this cable and a step of cooling (22), characterized in that said deposition step consists of plasma phase spraying. Procédé selon la revendication 4, caractérisé en ce que ledit matériau lubrifiant est à base de polytetrafluoroéthylène.Method according to claim 4, characterized in that said material lubricant is based on polytetrafluoroethylene. Procédé selon la revendication 4, caractérisé en ce que ledit matériau lubrifiant est inorganique.Method according to claim 4, characterized in that said material lubricant is inorganic.
EP98402348A 1997-09-25 1998-09-24 Device for coating a solid lubricant on a cable Withdrawn EP0905717A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9711937A FR2768848B1 (en) 1997-09-25 1997-09-25 DEVICE FOR DEPOSITING A SOLID LUBRICANT ON A CABLE
FR9711937 1997-09-25

Publications (1)

Publication Number Publication Date
EP0905717A1 true EP0905717A1 (en) 1999-03-31

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EP98402348A Withdrawn EP0905717A1 (en) 1997-09-25 1998-09-24 Device for coating a solid lubricant on a cable

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EP (1) EP0905717A1 (en)
JP (1) JPH11167053A (en)
FR (1) FR2768848B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0981136B1 (en) * 1998-08-19 2004-04-14 Pirelli Cables y Sistemas, S.A. Electrical cable and method and equipment for the obtention thereof
US6884474B2 (en) * 2001-10-09 2005-04-26 Nexans Method of coating a shaped body made of polymer material

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2528307A1 (en) * 1975-06-23 1977-01-13 Siemens Ag Multi core flexible electric cable with lubricant coated cores - which is capable of withstanding high alternating bending stress
DE2545931A1 (en) * 1975-10-14 1977-04-21 Felten & Guilleaume Carlswerk Injecting foamed plastic insulation into coaxial cables - to obtain controlled expansion and form uniform cell structure, aided by lubricant addition
DE3429745A1 (en) * 1984-08-13 1986-02-20 Lapp GmbH, 7000 Stuttgart Process for increasing the output of cable-sheathing installations
JPS6328855A (en) * 1986-07-21 1988-02-06 Nippon Telegr & Teleph Corp <Ntt> Production of fluorocarbon-base solid lubricative film

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2528307A1 (en) * 1975-06-23 1977-01-13 Siemens Ag Multi core flexible electric cable with lubricant coated cores - which is capable of withstanding high alternating bending stress
DE2545931A1 (en) * 1975-10-14 1977-04-21 Felten & Guilleaume Carlswerk Injecting foamed plastic insulation into coaxial cables - to obtain controlled expansion and form uniform cell structure, aided by lubricant addition
DE3429745A1 (en) * 1984-08-13 1986-02-20 Lapp GmbH, 7000 Stuttgart Process for increasing the output of cable-sheathing installations
JPS6328855A (en) * 1986-07-21 1988-02-06 Nippon Telegr & Teleph Corp <Ntt> Production of fluorocarbon-base solid lubricative film

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 8811, Derwent World Patents Index; Class E36, AN 88-074496, XP002066295 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0981136B1 (en) * 1998-08-19 2004-04-14 Pirelli Cables y Sistemas, S.A. Electrical cable and method and equipment for the obtention thereof
US6884474B2 (en) * 2001-10-09 2005-04-26 Nexans Method of coating a shaped body made of polymer material

Also Published As

Publication number Publication date
JPH11167053A (en) 1999-06-22
FR2768848B1 (en) 1999-10-22
FR2768848A1 (en) 1999-03-26

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