EP1324354A1 - Process for the continuous production of a corrugated coaxial cable - Google Patents

Abstract

Continuous fabrication of a coaxial cable involves imparting corrugations to a conductor of the cable in a corrugator which is caused to operate at constant speed. <??>An Independent claim is also included for an apparatus for continuously fabricating a coaxial cable, which comprises a corrugator for imparting corrugations to a conductor of the cable, at least one drive station for driving a portion of the cable, and control mechanisms arranged to control a drive station speed as a function of a corrugator speed.

Description

The present invention relates to a method of manufacture of a corrugated coaxial cable.

Coaxial cables are widely used today for multiple applications and in particular in signal transmissions from radio frequency. We know, for example, such cables to transmit television signals or signals cell phone of various generations.

A coaxial cable includes a central conductor surrounded by a dielectric and a peripheral conductor usually protected by a polymer sheath. In many cases, the dielectric is made of a polymer expanded and extruded, and the peripheral conductor is in copper or aluminum. In many cases, the the peripheral conductor is corrugated so as to provide the coaxial cable flexibility compatible with installation conditions while guaranteeing the better transmission qualities.

It is well known that these transmission qualities depend both on the intrinsic qualities of the inner and outer conductors and dielectric, but also respect for nominal geometrical values of these same conductors, characterized by the diameter outside the center conductor, by the diameter inside or an equivalent diameter in the case of a annealed peripheral conductor, and finally by the regularity of these intrinsic characteristics or those nominal values along the cable axis. The process of manufacturing therefore enters for a significant part in the times in the economic aspect of the cable terminated both in pure value only in value after production yield, and in the ability to realize the cable at speeds high while keeping this quality.

The known methods, if they allow undoubtedly to produce quality products widely marketed, show some disadvantages. So the most used processes are based on taking the manufacturing drum from the central conductor surrounded by its dielectric and then to introduce this element into the peripheral conductor cylindrical which is pulled by a caterpillar and is then annealed before being wound on a receiving drum. At the outlet of the upstream reel, the driver element central surrounded by its dielectric passes on a puppet regulator whose role is to correct the speed of unwinding of this drum. At the exit of the anneller, the cable element comprising the peripheral conductor ringed goes on a puppet also responsible for regulating the speed of rotation of the receiving drum.

In this method, the speed of unwinding reference is the speed of the crawler to shoot on the peripheral conductor. Because of this and despite regulation of the original drum and the drum of reception, the annealing head is subjected to a force constantly varies in intensity and direction of fact continual speed variations of the drum of origin, which corresponds to a quantity of variable intermediate per unit of time, and continual speed variations of the drum receipt, which corresponds to a quantity of product variable finish per unit of time.

As a result, this process involves measuring or to estimate the axial force exerted on the head annealing and bring the latter permanently back to its equilibrium position by changing the speed of rotation of tools to achieve annealing. This change in speed causes itself voltage changes on the whole of the line and thus drive by the game of puppets previously cited a change in input speeds and output for the drums mentioned above.

This situation can be summarized by noting that, in such a process, the peripheral conductor is brought in the anneller at a given speed which is the speed serving as a speed reference to the line of manufacturing. The quantity of conductor thus brought is equal to the amount of driver consumed by the annealer, this quantity being therefore a function of the crawler reference speed and diameter of the welded conductor before entering the annealer. This same amount of driver consumed is of course the parameters of the corrugation, in particular the diameter on annulus, from the bottom of the annulus and the shape of the annelure. As for the central conductor with its dielectric, it is driven by the operation annealing which is carried out in compression on the dielectric and a voltage is required to stretch this same central conductor element with its dielectric.

The use of such a process therefore involves definition of a peripheral conductor speed (which is in the form of a tube before annealing) and a diameter for this peripheral driver and then by calculating a approximate speed of rotation of the annealing head. During the start-up tests, the different voltages, voltage for unwinding the reel of origin and tension for the accumulation on the drum of reception to obtain the desired sizing.

We therefore understand that the change of a single parameter requires the change of all others parameters to maintain the desired dimensioning, this which leads on the one hand a complexity of operation not conducive to excellent returns and secondly many risks of malfunction that lead to either quality degradations or waste additional manufacturing.

Finally, in such a process, given the variation of the speed of the original drum and therefore the induced voltage for the cable element (consisting of its central conductor and its dielectric) introduced in the peripheral cylindrical conductor, we can estimate that the sliding of the peripheral conductor on the dielectric is never constant. This is all more important than the incident cable element, formed of its central conductor with its dielectric, passes only on a puppet at the exit of the initial drum and thus tends to maintain its initial curvature on the drum. But this curvature is not regular, changes as and when measurement of the unwinding and makes that this cable element is by nature in an unstable position at the time of his introduction into the peripheral conductor. it requires adjusting the parameters to find a compliant cable. In addition, the slicing faults of the dielectric on the upstream reel are directly reflected at the level of the annealer by a variation of voltage generating a variation of the annealing shape.

The existing processes are therefore based on a permanent regulation of a system of several parameters around an optimum operating point which can only be obtained after adjustments progressive. (Some existing processes do not include not even the operational flexibility introduced at level of lateral flutter of the annealing head and its use to regulate the speed of rotation of the head annealing). In any case, the existing processes are therefore processes capable of producing quality but at the cost of a great difficulty of control and control of the process, a little compatible vigilance with certain modern imperatives of production, and of very limited speeds. All these points have inevitably consequences even relatively low, on the optimum quality of a product such as coaxial cable whose performance is precisely in part related to a great geometric regularity of various components. It finally follows yields bad enough due to either setting or re-setting times lengthy operations, or at fairly high levels of waste due in particular to performance drifts.

The present invention therefore aims to to overcome these multiple disadvantages by offering a process more stable and easier to adjust while allowing to consider higher speeds of without risk of deterioration of quality, reducing waste and defects due to drift manufacturing.

The invention also aims to promote the setting in tandem certain operations such as the achievement of dielectric or sheathing.

The present invention therefore aims at a greater stability and increased productivity in order to offer the possibility to increase speeds.

According to a first aspect, the invention is based on the principle of operating the annealer at a constant speed. According to a second aspect that can be implemented regardless of the first aspect or together with it, the operating speed of the annealer is chosen as a reference speed for adjusting the speed of at least one of the drive elements of the device used to displace the cable or a part of it during the manufacturing.

More specifically, it is provided according to the invention a continuous manufacturing process of a coaxial cable in which rings are formed on a cable conductor in an annealer and the annealer is operated at constant speed.

• en amont de l'anneleur, on entraíne le conducteur à une vitesse intermédiaire constante,
• on règle la vitesse intermédiaire en fonction de la vitesse de l'anneleur,
• à un poste d'introduction situé en amont de l'anneleur, on introduit un élément de câble dans le conducteur,
• en amont du poste d'introduction, on entraíne l'élément de câble à une vitesse amont constante,
• on règle la vitesse amont en fonction de la vitesse de l'anneleur,
• en amont du poste d'introduction, on donne à l'élément de câble une forme rectiligne,
• en aval de l'anneleur, on entraíne le conducteur à une vitesse aval constante,
• on règle la vitesse aval en fonction de la vitesse de l'anneleur, et
• la vitesse aval est égale à la vitesse intermédiaire.

The method according to the invention may have at least any of the following characteristics:

• upstream of the annealer, the driver is driven at a constant intermediate speed,
• the intermediate speed is adjusted according to the speed of the corrugator,
• at an introduction station located upstream of the annealer, a cable element is introduced into the conductor,
• upstream of the introduction station, the cable element is driven at a constant upstream speed,
• the upstream speed is regulated according to the speed of the corrugator,
• upstream of the introduction station, the cable element is given a rectilinear shape,
• downstream of the annealer, the driver is driven at a constant downstream speed,
• the downstream speed is regulated according to the speed of the corrugator, and
• the downstream speed is equal to the intermediate speed.

It is also provided according to the invention a device for continuously manufacturing a coaxial cable comprising a annealer to form rings on a conduct of the cable and control means, the means control devices being arranged to operate the corrugator at constant speed.

• il comprend en amont de l'anneleur une chenille amont d'entraínement d'un élément de câble destiné à être introduit dans le conducteur, et
• il comprend en aval de l'anneleur une chenille aval d'entraínement du conducteur.

The device according to the invention may also have at least one of the following characteristics:

• it comprises upstream of the annealer a caterpillar upstream drive of a cable element intended to be introduced into the driver, and
• it comprises downstream of the anneller a caterpillar downstream drive of the driver.

• à au moins un poste d'entraínement, entraíner une partie du câble à une vitesse d'entraínement ;
• dans un anneleur, former des anneaux sur un conducteur du câble, et
• régler la vitesse d'entraínement en fonction d'une vitesse de l'anneleur.

Also provided according to the invention is a method of continuously manufacturing a coaxial cable comprising the steps of:

• at least one training station, drive a portion of the cable at a drive speed;
• in an annealer, forming rings on a cable conductor, and
• adjust the drive speed according to a speed of the corrugator.

• l'anneleur est situé en aval du poste d'entraínement,
• au poste d'entraínement, la partie du câble comprend le conducteur,
• à un poste d'introduction, on introduit la partie du câble dans le conducteur, le poste d'entraínement étant situé en amont du poste d'introduction, et
• le poste d'entraínement est situé en aval de l'anneleur.

The method according to the invention may advantageously have at least one of the following characteristics:

• the annealer is located downstream of the training station,
• at the training station, the part of the cable includes the driver,
• at an introductory station, the portion of the cable is introduced into the conductor, the training station being located upstream of the introductory station, and
• the training station is located downstream of the annealer.

• un anneleur pour former des anneaux sur un conducteur du câble ;
• au moins un poste d'entraínement d'une partie du câble ; et
• des moyens de commande,

   dans lequel les moyens de commande sont agencés pour commander une vitesse du poste d'entraínement en fonction d'une vitesse de l'anneleur.The invention also provides a device for continuously manufacturing a coaxial cable comprising:

• a corrugator for forming rings on a cable conductor;
• at least one drive station of a portion of the cable; and
• control means,

wherein the control means is arranged to control a speed of the training station according to a speed of the annealer.

• l'anneleur est situé en aval du poste d'entraínement,
• au poste d'entraínement, la partie du câble comprend le conducteur,
• il comprend un poste d'introduction de la partie de câble dans le conducteur, le poste d'entraínement étant situé en amont du poste d'introduction, et
• le poste d'entraínement est situé en aval de l'anneleur.

The device according to the invention may advantageously have at least one of the following characteristics:

• the annealer is located downstream of the training station,
• at the training station, the part of the cable includes the driver,
• it comprises a station for introducing the part of cable into the driver, the training station being located upstream of the introduction station, and
• the training station is located downstream of the annealer.

• en aval de l'anneleur, on installe une gaine sur le conducteur, et/ou
• en amont de l'anneleur, on assemble un conducteur central et un diélectrique du câble.

In any of the methods of the invention, provision may be made for

• downstream of the annealer, a sheath is installed on the driver, and / or
• upstream of the annealer, a central conductor and a dielectric of the cable are assembled.

• La figure 1 est une vue de côté d'une extrémité d'un câble coaxial fabriqué au moyen du procédé de l'invention, montrant les différentes couches du câble ;
• la figure 2 est une vue schématique en élévation d'une chaíne de fabrication selon un mode de réalisation de l'invention ; et
• la figure 3 est une vue schématique en coupe longitudinale de l'anneleur de la chaíne de la figure 2,
• la figure 4 est une vue schématique en coupe longitudinale de la tête de l'anneleur de la figure 3, et
• la figure 5 est une vue analogue à la figure 2 montrant un autre mode de réalisation de l'invention.

Other features and advantages of the invention will become apparent in the following description of two preferred embodiments given as non-limiting examples with reference to the drawings in which:

• Figure 1 is a side view of an end of a coaxial cable manufactured by the method of the invention, showing the different layers of the cable;
• Figure 2 is a schematic elevational view of a production line according to one embodiment of the invention; and
• FIG. 3 is a schematic view in longitudinal section of the annealer of the chain of FIG. 2,
• FIG. 4 is a diagrammatic view in longitudinal section of the head of the annealer of FIG. 3, and
• Figure 5 is a view similar to Figure 2 showing another embodiment of the invention.

In the embodiments that are going to be described, the method according to the invention aims at producing a corrugated coaxial cable 2 as represented for example in Figure 1. This cable includes a central conductor metal 4 constituting the core of the cable. The cable comprises a dielectric material 6 of tubular form cylindrical covering the central conductor 4. The dielectric material consists of an expanded polymer and extruded. The cable further comprises a conductor peripheral 8 of cylindrical tubular shape covering the dielectric material 6. Finally, the cable comprises a sheath 10 in tubular polymeric material cylindrical covering the peripheral conductor 8. The layers 4, 6, 8 and 10 succeed each other directly above the others and in this order following the radial direction from the central axis of the cable. Such a structure is known in itself and will not be not further detailed here.

The peripheral conductor 8 is corrugated for provide flexibility to the cable in a known manner in itself. The annealing operation consists of forming a helical groove or in the form of a straight corrugation in the peripheral conductor from the outer face of this one to give it the appearance of a succession rings.

In a manner known per se, the device illustrated in FIG. FIG. 2 comprises a production drum 12 or drum upstream constituting a reserve of a formed cable element at this stage only by the center conductor 4 and the dielectric 6 surrounding it.

The device forms a production line comprising different items than the cable element crosses successively, the manufacture having however place continuously. The upstream and downstream directions refer therefore in the direction of movement of the cable element to during manufacture, indicated by the arrow 11.

Downstream of the drum 12, the chain includes a station 14 in which the cable element 4, 6 from the drum is introduced into the conductor 8 device still in the state of smooth tube.

Downstream of this introductory post, the channel includes an intermediate training station 16 in which the peripheral conductor 8 is driven next the downstream direction. This item includes a caterpillar 18 having two endless bands resulting in the driver following a straight horizontal path and extending above and below the driver 8 of either side of it to sandwich it.

Downstream of the intermediate training station 16, the chain comprises an annealing station or annealer 20 in which are made the corrugations on the Peripheral conductor 8.

Finally, at the downstream end of the chain, this one includes a reception drum or reel 22 on which is wound up the cable element comprising stage the central conductor 4, the dielectric 6 and the ringed peripheral conductor 8.

We will briefly describe with reference to Figures 3 and 4 the annealer 20 which is of a conventional type.

The annealer 20 comprises a frame 40 and a shaft hollow 42 crossed along its axis 45 by the element of cable being manufactured. The annealer includes two rolling bearings 44 with which the shaft is mounted mobile rotation relative to the frame around the axis 45 which is also the axis of the cable. This rotation is indicated by the arrow 46. The cable element slides in the tree along the downstream direction 11 parallel to this axis without turning on itself. To avoid problems contact friction in the tree, sufficient clearance is provided between them.

The annealer comprises a motor 48 driving the shaft 42 rotating through a transmission 50.

The annealer comprises a ring head 52 fixed rigidly at the upstream end of the shaft 42 and rotating therefore at the same speed. This speed of rotation is called speed of the annealer in the this description.

The annealer comprises a tool holder 54 connected to the head 52 by a transverse axis 56 radial to the axis of rotation 45. The head comprises actuating means the axis to adjust a radial position of the tool holder relative to the head along arrow 57, as well as angular position along arrow 59 as a function of parameters of the desired annealing.

The annealer includes a tool 56 of form annular or helical according to the type of annealing, housed in the tool holder 54, a roller bearing 58 being interposed radially therebetween. Tooling 56 and the bearing 58 have a common axis not shown, parallel and distant from the axis 45 or inclined with respect to the axis 45. Owing to the presence of the bearing 58, the tooling 56 is free to rotate relative to the tool holder 54 which does not does that define the angular and radial position of tooling relative to the axis 45 of the cable.

In operation, the tooling 56 rolls on the cable 2 by making the corrugations by deformation of the 8. This movement is the result of the conjunction of rotation 46 of the anneller and the sliding of the cable in the annealer.

According to the invention, the chain further comprises a upstream training station 24 extending downstream of the upstream drum 12 and upstream of the insertion station 14.

The chain also includes a training station downstream 26 extending downstream of the annealer 20 and upstream of the reception drum 22. This training station serves to drive towards the reel the cable element provided ringed peripheral conductor 8.

The training stations 24 and 26 are shaped basically like the training station intermediate 16 and formed of a caterpillar each.

As seen in Figure 2, this chain does not not include a puppet interposed between caterpillar 24 and the annealer 20 to adjust the voltage of the element of cable. Similarly, in this example, the downstream puppet usually arranged between the annealer 20 and the drum 22 and used for the regulation of the speed is replaced by a simple guide pulley 30.

So, in this example, we impose the passage of the cable element, formed only of the conductor inside 4 and dielectric 6, in the post upstream training 24 whose double merit is give a stable speed V1 to the cable element and take away his curvature memory to make it rectilinear and thus avoid turbulence during his introduction into the peripheral driver 8 which is meanwhile trained by the intermediate position 16 to a speed V2.

This introductory mode has the advantage of not disrupt the positioning edge to edge of the ribbon copper under the welding torch, so reduce the risks of welding defects. It also has the advantage of put the dielectric at an optimal position by compared to the hot spot given by the welding of the driver.

In the present embodiment of the invention, the speeds V1 and V2 of these two stations are fixed and constant over time. This eliminates the inconvenience parasitic relative slippage of the cable element consisting of the central conductor 4 with its dielectric 6 with respect to the peripheral conductor ringed 8 at the leveler 20.

We bring the cable element equipped with its dielectric and the front welded peripheral conductor annealing in the annealer 20 at given speeds and previously determined. The amount of driver peripheral, given by the caterpillar 16, is equal to amount of peripheral driver consumed by the annealer 20. This amount of peripheral conductor consumed is a function of the speed V2, the diameter of the 8 peripheral driver tube and parameters of the annelure, namely the diameter on annulus, the bottom of annealing, the pitch and shape of the annelure.

As a result, this positive training helps to fix the rotational speed of the annealer head 20. According to the invention, it becomes the speed of reference, unlike previous processes which took as reference speed that of the post 16. In addition, the speed of the corrugator is here constant.

Similarly, in the method of the invention, the speed V3 of the downstream station 26 is made equal to the speed V1 of the upstream station 24 driving the central conductor provided with its dielectric. This V3 speed remains proportional at the speed of reference which is that of the annealer whatever it is, even in the rising and speed descent. It is the same for the speed of post 24.

Thus, for the present implementation of the invention defines a speed of the annealer 20, a tooling, a diameter of annealing and a bottom of annealing. Then, from these parameters, we define the V2 speed of the peripheral driver tube 8, the tube diameter and speed V1 of the cable element formed of the central conductor 4 and the dielectric 6. calculations are within the reach of the skilled person.

Therefore, during the implementation of the process, it is much easier than in the known methods of set the correct operation, the operation being then of great stability.

It can be seen that the process of the invention eliminates the disadvantages of known methods related to instability permanent and a difficulty of piloting based on on predetermined drive speeds and a stable annealing speed. It also avoids instabilities due to the winding memory of the dielectric 8, to variations in the diameter of the dielectric and the different voltage variations of on both sides of the anneller.

This very stable operation also corresponds to this makes a minimum of constraints on the sector and therefore at a stationary wave ratio (TOS) interesting. Of same, the absence of voltage variation at the winding on the downstream drum 22 has a beneficial effect on the TOS.

Naturally, the chain includes means of command 21 to set the speed of the annealer 20.

The annealer 20 and the different posts 24, 16, 26 may be trained by a member of the common motorisation. However, given the problems that can be raised by transmission games possible and vibrations due to cyclical variations generated by a mechanical transmission, it will be advantageous to provide electronic means of regulation for adjusting the speed of different training stations.

The pulley 30 gives a minimum tension and sufficient practice for the cable to exit the annealer but without interfering with the formation of this annelure.

Figure 5 presents a second mode of realization rather close to the mode of Figure 2.

In this second embodiment, considering the great stability of operation of the chain according to the invention and the management of different elements in speed and not in tension, it is possible to provide for a tandem setting of this one with a line 34 for manufacturing the cable element comprising the conductor 4 and its dielectric 6, or with a line 36 for placing the outer sheath 10.

Thus, as illustrated in FIG. upstream of the upstream training station 24 and in place and place of the upstream drum 12 a production line 34, not illustrated in detail but known in itself, in which one installs the dielectric 6 on the driver 4. This chain runs continuously and direct connection with the production line previously described.

Alternatively, we can replace the chain 34 by two production reels 12 operating alternately so that when one of the reels is fully unwound, the second reel immediately takes over. During the devitation of this second reel, the first is replaced by a full drum. This ensures a permanent supply of the chain upstream.

Similarly, it can be provided downstream of the chain of manufacturing a sheathing chain 36 operating in continuous and in direct connection with the chain according to the invention described above. This chain allows the placing the sheath 10 on the cable element provided with ringed peripheral conductor 8.

A tandem setting of two receivers can also be provided at this level.

In this example, the chain includes in besides means for measuring the position of the pulley 30, here in the vertical direction, and to modify the speed of the downstream training station 26 when this position exceeds a predetermined threshold. The purpose of this speed control is to make sure that the pulley keeps a fixed position.

Tandemizations make the process particularly economical by ensuring a very high quality and result in a decrease considerable waste associated with each start-up of individual operations.

In a manner known per se, the invention may be implemented with a corrugator operating at a speed from 8,000 to 15,000 rpm. All equipment the chain can be connected to a fieldbus. The control means 21 may be connected to a computer receiving data from all organs of the channel for their display in real time for the purposes of manufacturing monitoring and archiving.

Of course, we can bring to the invention of many modifications without going outside the scope of this one defined by the appended claims.

Claims (25)

A method of continuously manufacturing a coaxial cable (2) in which rings are formed on a conductor (8) of the cable in a corrugator (20), characterized in that the corrugator is operated at a constant speed. Method according to Claim 1, characterized in that , upstream of the annealer (20), the conductor (8) is driven at a constant intermediate speed (V2). Method according to Claim 2, characterized in that the intermediate speed (V2) is adjusted as a function of the speed of the annealer. Method according to one of Claims 1 to 3, characterized in that at an insertion station (14) upstream of the annealer (20) a cable element (4, 6) is inserted into the driver (8). Method according to claim 4, characterized in that , upstream of the insertion station (14), the cable element (4, 6) is driven at a constant upstream speed (V1). Method according to Claim 5, characterized in that the upstream speed (V1) is set as a function of the speed of the annealer (20). Method according to any one of claims 4 to 6, characterized in that , upstream of the insertion station (14), the cable element (4, 6) is given a rectilinear shape. Process according to any one of Claims 1 to 7, characterized in that , downstream of the annealer (20), the conductor (8) is driven at a constant downstream speed (V3). Method according to Claim 8, characterized in that the downstream speed (V3) is set as a function of the speed of the annealer (20). Method according to any one of claims 2 or 3 and according to any one of claims 8 or 9, characterized in that the downstream speed (V3) is equal to the intermediate speed (V2). Device for the continuous production of a coaxial cable (2) comprising a corrugator (20) for forming rings on a conductor (8) of the cable and control means (21), characterized in that the control means are arranged to operate the corrugator at constant speed. Device according to claim 11, characterized in that it comprises upstream of the annealer (20) an upstream track (24) for driving a cable element (4, 6) intended to be introduced into the conductor ( 8). Device according to any one of claims 11 or 12, characterized in that it comprises downstream of the annealer (20) a downstream track (26) for driving the driver (8). A method of continuously manufacturing a coaxial cable (2) comprising the steps of: at least one drive station (24; 16; 26), driving a portion of the cable (4, 6, 8) at a drive speed (V1, V2, V3); and in a ring gear (20) forming rings on a conductor (8) of the cable, characterized in that the drive speed (V1, V2, V3) is set as a function of a speed of the annealer (20). A method according to claim 14, characterized in that the annealer (20) is located downstream of the training station (24; 16). Method according to one of the claims 14 or 15, characterized in that at the drive station (16; 26) the cable section comprises the conductor (8). Method according to one of Claims 14 to 16, characterized in that , at an insertion station (14), the cable part (4, 6) is inserted into the conductor (8), the drive station (24) being located upstream of the introduction station (14). Method according to any one of claims 14 to 17, characterized in that the drive station (26) is located downstream of the annealer (20). Device for continuously manufacturing a coaxial cable (2) comprising: a annealer (20) for forming rings on a conductor (8) of the cable; at least one drive station (24; 16; 26) of a portion of the cable; and control means (21), characterized in that the control means (21) are arranged to control a speed (V1, V2, V3) of the training station according to a speed of the annealer. Device according to claim 19, characterized in that the annealer (20) is located downstream of the training station (24; 16). Device according to any one of claims 19 or 20, characterized in that , at the drive station (16; 26), the portion of the cable comprises the conductor (8). Device according to any one of claims 19 to 21, characterized in that it comprises an insertion station (14) for the cable part (4, 6) in the conductor (8), the training station ( 24) being located upstream of the introduction station (14). Device according to any one of claims 19 to 22, characterized in that the drive station (26) is located downstream of the annealer (20) Method according to any one of claims 1 to 10 or any one of claims 14 to 18, characterized in that , downstream of the annealer (20), a sheath (10) is installed on the conductor (8) . Method according to any one of claims 1 to 10 or any one of claims 14 to 18 or according to claim 24, characterized in that , upstream of the annealer (20), a central conductor (4) is assembled and a dielectric (6) of the cable.

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