SE1050973A1 - Cable and method of manufacture thereof - Google Patents

Abstract

SUMMARY Cable (10), comprising a sheath (22) having a tubular band (24) of a material selected from a group of materials consisting of cellulose, polymeric material or a combination thereof, a sheath (20) of polymeric material around the housing (22) and a cable body (12) inside the housing (22). According to the invention, the casing (22) has such an elasticity that it is able to resiliently withstand a compressive force from the sheath (20) when the sheath shrinks during its formation, thereby maintaining a predetermined clearance (p2) to the cable body (12) and / or a resulting roundness of the mantle until the mantle has solidified. (Flo. Se)

Description

However, there is a problem with hose extrusion. When the cable body is not completely circular-cylindrical, which is usually the case, the rod-extruded sheath will not be circular-cylindrical either. The outside of the sheath will mainly follow the shape of the cable body. In many cable constructions this has no significance, while in other cases it is not desirable. An example of such a cable is shown in FIG. 2.

To achieve the round shape on the outside of the jacket, there is a widely used method. It is ensured that the irregular cable body has a round shape before the sheath is put on. This is achieved by extruding the irregular cable body with as little material as possible, but enough for the cable body to be round. This extrusion usually uses a cheap material which is also easy to tear off when a cable end is to be prepared for connection. The sheath can then be applied to the now round cable body. Here you can now use either filling extrusion or hose extrusion because the result in both cases is an evenly thick and round mantle surface. An example of such a cable is shown in FIG. 3.

There are also other methods for creating a round shape on the cable body. For example, filling strands of some inexpensive material can be lengthened in the irregularities of the cable body. To keep the strands in place, the cable body can then be tied concentrically with, for example, a polymer tape, a paper tape, a textile tape, etc., after which the sheath is now placed on the slightly round cable body.

Another phenomenon that is always present in cable manufacturing can be called the adhesion problem. Since both the sheath and the cable body comprise polymeric materials, which are often also the same type, an adhesion problem often arises. When the hot jacket is placed on the cable body, the materials want to fuse together, which makes it extremely difficult for the user to peel off the jacket and expose the cable body to a connection. In addition, adhesion impairs the flexibility of the cable. Different methods are used to avoid the adhesion problem. It is very common to talk about the cable body. The talc has the ability to prevent adhesion.

This method can be somewhat unsafe when it comes to getting every surface of the cable body covered with talc. Furthermore, the taik is not very popular with the installers as it often involves quite a lot of talk. Another method is to longitudinally or concentrically lay a foil of any polymeric material which does not have adhesive properties to the materials concerned. Paper is also a useful material as well as any suitable textile. They also work with various additives in the polymeric materials that have the task of preventing adhesion.

A cable according to the invention can typically also contain cabling or SZ cabling.

To describe these processes, it may be appropriate to select a type cable. A very common cable is a so-called white cable. It can be an EKK, made of PVC, or an EQQ, ie. an equivalent cable but made of a different material, so-called halogen-free material. Said cable body has in these cables 2, 3, 4 or 5 solid copper conductors, each with an extruded insulation. Such an insulated conductor can be called a cable part. In order for the finished cable to be bendable, the parties must be wired. This can be done by constantly wiring the parties in the same direction, comparing ropes or cables.

When this type of cabling takes place, ie. in the same direction, this operation is generally performed in a particular machine and not in tandem with any other process. Since EKK / EQQ is a type of cable that is sold in large volumes and is consequently heavily price-pressed, the parties are instead allowed to be wired in an SZ cabling machine. This process can take place in tandem with the mantle laying and is thus considered to be more rational.

SZ ~ cabling means that the cabling does not take place continuously in the same direction but varies from right to left with a small parallel distance between the turns. The level can, for example, let the cabling machine go ten turns to the right and then ten turns to the left. If such an SZ-wired cable body is subjected to an excessive longitudinal pull force immediately after the wiring, the wiring will open and the parties will return to being parallel. To avoid this, let the SZ-wired parts as soon as possible in the production line go into a first extruder where the wired parts are spray-filled so that the cable body has a round shape. This filling extrusion thus also has the function, in addition to creating a round cable body, to lock the SZ cabling and prevent it from opening when the cable body is subjected to a tensile force during manufacture.

There are also other ways to lock the SZ cabling, such as winding / strapping with a ribbon or string. An important property of a cable according to the invention is the scalability.

This refers to the work that an installer has to perform on a cable end before the final connection. If, for example, such a cable as described above is chosen, namely EKK or EQQ, the stripping of the cable ends can be a very common job for an installer. A quick and easy to perform peeling is much appreciated by an installer and not only facilitates the work, but also has an economic significance.

On the mentioned cables, the peeling takes place in the following way: If e.g. 1 m sheath should be peeled off, the installer makes a light cut around the sheath 1 m into the cable. The installer then twists the jacket back and forth a few times so that the entire jacket cracks around the cut. The installer then tries to pull the 1 m long jacket from the cable body. In all probability, the installer will not be able to pull off such a long piece of mantle. the installer then probably tries to pull off a shorter piece and then takes piece by piece until 'l m cable is scaled. If the talc is insufficient, the installer will have problems even with a short section. In this case, the installer tries to cut the sheath lengthwise with his knife and then risks damaging the cable body.

When the sheath has been stripped, the less extruded plastic extruded plastic, which gives the cable body its round shape, must be removed. This can be difficult if the amount of talc used has been too small and there are adhesion problems. In general, however, it is quite easy to remove this layer, but the surroundings are usually soiled by the talc and the hands tend to become quite talcum.

To provide further background to the invention, it may be appropriate to describe in more detail the above-mentioned EKK / EQQ cable, which may be an example of a type of cable to which the invention can be applied. FIG. 3 thus shows such a cable 10 as it is used today. A cable body 12 in this case comprises three cable parts 14 with each a copper conductor 16 and a conductor insulation 18. A so-called filter 17 has the task of partly making the cable body 12 round, and partly also locking the SZ cabling during the manufacturing step. The necessary traction force during manufacture is transmitted through the cable body 12. t FIG. 3, a three-conductor is shown, but the cable body 12 may in many types of cable in a manner not shown contain many more parts 14. With a sufficient number of many constituent parts 14 a more and more round cable body is formed and the filler 17 may become superfluous. Instead, a band (not shown) can be concentrically banded around the parts 17 to hold them together and then also improve the roundness, but also prevent adhesion to the surface sheath 20 and also prevent the SZ cable from opening. Returning to the EKKlEQQ cable in FIG. 3, this type of cable generally consists of 2, 3, 4 or 5 parts and always contains a filler 17. The filler 17 is, as previously mentioned, filling extruded to form the round shape. The sheath 20 is located on the outside of the filler. The sheath 20 can either be filling extruded or hose extruded. In both cases the outer surface of the jacket 20 will be round. To prevent adhesion, the three parties 14 may be talced against the filler 17. In addition, the outside of the filler 17 may be talc before the sheath 20 is applied. Other previously known measures to prevent adhesion may also be considered.

Both the SZ cabling, the application of the filler 17 and the application of the jacket 20 as well as all talc take place in the same process. The parties 14 are manufactured in an earlier process. This type of cable must be able to be scaled as mentioned earlier and in general this also works somewhat well, but never as well as the installers would like.

The slightest mistake in talking can be devastating. Furthermore, there are a number of other parameters of sub-manufacturing that can negatively affect scalability.

FIG. 1 shows a variant that is not normally used on EKK / EQQ cables because it becomes significantly more expensive and almost impossible to scale. The sheath 20 has been extruded into a round outer shape on the cable body 12. Here, the sheath material is also used to obtain the round outer shape of the cable 10. On the other hand, this variant was used for so-called sladdar, tex. a standard lamp cord with three parts. As already mentioned, the standardized jacket thickness may be credited only from the circularly dashed line around the portions 14 in FIG. 1.

FlG. 2 illustrates what can happen if a sheath 20 is extruded directly onto the cable body 12. The sleeve in this case has an evenly thick sheath 20 but which during the process has a tendency to shrink around the cable body 12 and more or less 10 15 20 25 30 6 bitda a triangular shape. This is not acceptable on an EKKlEQQ cable, but may be acceptable on other cable types.

In all of the commonly used cabbage constructions shown in FIG. 1-3, there is a risk that the cable body 12 will adhere to the mantle 20 unless special measures are taken. As previously mentioned, talc is common but also wrapped bands 24 enclosing the cable body 12 with the property of preventing adhesion are common. It can be strips of perfume material with this property but also strips of paper.

I F 1G. 1-3 also show in dashed lines the possibility of enclosing the cable partner alcabet bodies with bands 24 in a known manner. FIG. 1, a paper strip 24 is laid around the three parts 14, after which the jacket 20 is spray-filled. The paper strip 24 will then be formed in accordance with the contour of the three cable parts '14, and applied with hard pressure to the cable body 12. In this case a paper which is soft and malleable is advantageously used. If a harder paper is used, the filling spray will nevertheless shape the paper according to the contours of the parties' 14 contours.

In FIG. 2, a longitudinal paper strip 24 is laid around the cable body in the same way.

It is advantageous to use a softly malleable paper, so that the edge of the paper does not tend to rise and penetrate into the jacket 20.

In FtG. 3, in the same way a wrapped paper strip 24 is laid around the already round-shaped cable body 12. Also in this case it is suitable to use a softly mouldable paper in view of the tendency of the paper edge to rise.

The methods are well known and widely used. However, today a polymer strip is used rather than a paper strip for the reason that the polymer strip is stronger in the longitudinal direction and thus more production-friendly. DISCLOSURE OF THE INVENTION An object of the invention is to provide a cable of the type initially indicated which is easy to scale and / or which can be manufactured at low material cost.

Another purpose is to provide, in addition to the low material cost, advantageous properties in cables where scalability is of secondary importance, for example improved roundness of the sheath and improved flexibility.

These objects are achieved by the features set forth in the appended claims.

According to a consideration of the invention, the sheath has such an elasticity that it is able to resiliently withstand a compressive force from the sheath when the sheath shrinks during its formation, thereby maintaining a predetermined play to the cable body and / or a resulting roundness of the sheath until the mantle has solidified.

According to another consideration, the sheath is provided with a winch to the cable body prior to forming the sheath, and is capable of being elastically compressed by resistance to a compressive force from the sheath as the sheath shrinks during said forming, thereby maintaining a resulting winch to the cable body and / or a resulting roundness of the mantle until the mantle has solidified.

By maintaining a play, at least during the application of the sheath, between the casing and the cable body, the sheath can be kept round without pressing against the cable body via the height and without the need for any supporting or friction-reducing material between the height and the cable body. Thus, the casing and sheath can be more easily separated from the cable body in a peeling operation. The object on which the invention is based is that before the shrinking soft jacket has solidified, it can be kept round and with a desired inner diameter by relatively small counteracting internal forces. Thus, during the manufacturing phase, a shrinking soft jacket can be supported by an elastic flexurally rigid inner height. Hötjet can then, like a vault, absorb external pressure from the jacket by being exposed to bending and compressive stresses. Thereby, during the manufacturing phase, the casing can resist the shrinkage and prevent the sheath from clamping the cable body, and maintain the resulting play and / or the roundness of the cable. When the sheath has finally solidified, the casing has fulfilled its task, so that the resulting play / round heat is subsequently maintained by the solidified sheath.

The casing can be flexurally elastic and compressed by bending to a smaller radius of curvature. The belt will then be caused to slide in a circumferential direction along the inside of the jacket, so that its longitudinal edges move towards or overlap from each other.

According to an embodiment of the invention, the casing is furthermore arranged with such a tensile strength that it is able to absorb pulling forces which act on the cable during a manufacturing phase. This embodiment may be suitable for preventing the opening of an SZ cabling by partially allowing the housing to be tensile loaded during the pulling of the cable during e.g. a hose extrusion operation. The hot newly extruded sheath can thus otherwise stretch under tensile load and thus cause the SZ cabling to open when the cable is pulled out during the manufacturing process.

The band may extend in the longitudinal direction of the cable. It can then be circularly curved across the longitudinal direction, so that its longitudinal edges form e.g. a gap or overlap, which may be resiliently glued or unglued, so that the casing can be compressed by diameter-reducing sliding of the overlap during the shrinkage of the jacket. With a free gap or unlucked overlap, the low friction of the belt against the casing can partly prevent the casing from slipping more than allowed by the prestressing force from the casing. Primarily, however, the belt can be given such flexural elasticity by suitable material choice (eg paper quality and thickness) that only this prevents the casing from being compressed past a titlated size of the resulting smaller play.

Thus, although the strip could also be of suitable polymeric material or a combination of polymeric material and paper / cellulose, it is in one embodiment of paper. Paper of the long-fiber type where the fibers are oriented in the pulling direction has proved to be particularly expedient due to its elastic strength and flexural elasticity and thus the ability to withstand relatively large external pressures in a curved shape.

Such paper of such ordinary quality can also be bent by suitable measures and maintain a circular tube shape. Paper is also relatively inexpensive. A method of manufacturing a cable according to the invention comprises arranging a cable body; enclosing the cable body with an elastically compressible housing having an initial play to the cable body, the housing comprising a tubular band (24) of a material selected from a group of materials consisting of cellulose, polymeric material or a combination thereof; forming a sheath of polymeric material on the casing; and shrinking the sheath to elastically compress the sheath, the sheath being capable of resisting shrinkage, thereby maintaining a resulting play to the cable body and / or a resulting roundness of the sheath until the sheath has solidified. In the process, the l-loop can be compressed by bending the belt by sliding along a circular inside of the jacket to a smaller radius of curvature.

Other features and advantages of the invention may be apparent from the claims and the following description of embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS FlG. 1 is a cross-sectional view of a known padding extruded cable; FlG. 2 is a perspective view of a cut piece of a known cable with hose-extruded sheath; FIG. 3 is a cross-sectional view of a common variant of an EKKlEQQ cable; FIG. 4 is a perspective view of a sectionally stripped piece of cable according to the invention; FlG. 5A and 5B are schematic end views on a larger scale of a cable approximately according to FlG. 4 before resp. after shrinking a sheath around an envelope with an overlap; 10 15 20 25 30 10 FIG. 6 is a schematic perspective view of a process for forming a sheath according to the invention around a cable body; FIG. 7A and TB are schematic cross-sectional views with broken away parts of a cable according to the invention before resp. after shrinking a sheath around a casing with a slit; FIG. 8 is a perspective view of a cut piece of a hot round cable according to the invention; and FIG. 9 is a schematic end view of a cable according to the invention with an intermediate roundness.

In the drawing, the same reference numerals are used throughout for parts with the same or similar function.

DETAILED DESCRIPTION OF EMBODIMENT EXAMPLE FIG. 4 shows an end portion of a cable 10 according to the invention. In this case, the three cable parts 14 forming the cable body 12 are SZ-wired. (They can of course also be conventionally wired, but for EKK / EQQ cables this is usually not rational.) Around the cable body 12 a paper band 24 is bent in such a way that it forms a relatively compression-resistant tube or height 22 of the cable 10. The paper band 24 can be of the long fiber type and have a thickness of typically about 0.05 - 0.25 mm. An example of such a paper is a paper supplied by lvlunksjö Paper AB for use in paper-insulated high-voltage cables or transformers.

In the example of FIG. 4, the longitudinal edges 26, 26 'of the paper tape 24 are overlapped by a few mm. In order to prevent the outer edge 26 'of the paper strip 24 from rising and undesirably penetrating into the jacket 20, there may be a joint in the form of, for example, a longitudinally resilient adhesive strand 28 between the overlapping portions of the edges. By "compliant" is meant that the joint can allow the overlapping portions to slide relative to each other without rising when the sheath 20 shrinks during its solidification process. 10 15 20 25 30 11 1 FIG. 5A is an illustrative schematic end view of a cable 10 approximately in accordance with FIG. 4 in a state when the mantle 20 begins to be extruded, e.g. hose extruded, and is in a hot, non-solidified state. In this state, the cable body 12 is enclosed with an initial predetermined clearance p1 to the enclosing housing 22. For a cable with an outer diameter of about 10-15 mm, the initial clearance p1 can amount to about 1 mm. When the sheath 20 begins to cool, it shrinks, and applies an external pressure to the sheath 22. The sheath 22 is then elastically compressed by forcing the paper belt 24 to bend its radius of curvature by bending, while the outside of the belt 24 slides circumferentially along the inside 21 of the sheath 20, so that the overlapping portions of the edges 26, 26 'become larger and larger. During this process, the strap 24 makes more and more resistance to the compression by its flexural elasticity and by any friction against the inside 21 of the jacket 20. When shown in FIG. 5B, the jacket 20 has finally shrunk completely and cooled and solidified, the winch has reached its resulting value p2, which for the cable in question with an outer diameter of about 10-15 mm can amount to about 0.5 mm.

The housing 22 is thus provided with such a compression pour strength / flexural stiffness that it can radially withstand a part of the compressive force of the subsequent hose-extruded jacket 20 by being compressed from the larger initial radial play p1 to the resulting smaller play p2. The desired degree of shrinkage or the values of p1 and p2 can be determined e.g. by trying and selecting the appropriate paper quality and thickness, pre-treating the paper and selecting the appropriate extrusion tool. In FIG. 5A and 5B, the cable body 12 is shown "free-floating" inside the housing 22, but in practice it will of course be supported by the housing 22 at various locations along the cable 10. The compressed housing 22 will retain its round shape due to its inherent elasticity. The ideal case is that the casing 22 is not compressed more than it is still free from the cable body 12. If, on the other hand, the casing 22 was initially allowed to rest against the cable body 12, then the shrinkage of the sheath 20 would further increase the pressure against the cable body 12, with scalability deteriorating. .

Thus, in order to avoid that the casing 22 is deformed when the sheath 20 is applied, one must use a paper tape 24 of a certain stiffness. When such a paper strip 24 is formed into a round shape, it will immediately after molding want to open and the outer longitudinal edge 26 'will tend to rise and then penetrate into the sheath 20. This problem can thus be solved by the longitudinal edges 26, 26 'are resiliently fixed relative to each other, for example by the resilient adhesive string 28 described above, or in another suitable manner.

FIG. 6 shows schematically and in a simplified manner a method of manufacturing the casing 22. In this example, the casing 22 is made of a paper strip 24 which is fed from a roll 30 parallel to a cable body 12 through a tapered nozzle 32 in such a way that the strip 24 is formed into said tube 22 with the initial play around the cable body 12. Along one longitudinal edge 26 'of the belt 24 a glue string 28 can be applied in a manner not shown and known per se. The glue string 28 and the longitudinal edge 26 "will resiliently adhere the other longitudinal edge 26 of the belt 24 upon passage of the nozzle 32 and at the subsequent shrinkage of the jacket, so that the longitudinal edge 26 'does not rise. Alternatively, the belt 24 may be treated in other ways not shown to prevent this longitudinal edge 26 'from rising or to prevent the belt 24 from striving to return to its planar shape.

Although FlG. 4 and 5A, SB shows a strip 24 where the longitudinal edges 26, 26 'overlap each other, it is also possible that as shown in FIG. 7A and 7B leave a gap between the longitudinal edges 26, 26 '. In the lantel 20, e.g. by the above-mentioned hose extrusion, where the sheath 20 during shrinkage as well as, in the example above, will exert an external pressure on the sheath 22. When the sheath 20 begins to be applied, the sheath 22 thus maintains the initial radial play p1 through its flexural elasticity, which shown in FIG. 7A. As the sheath 20 solidifies, it shrinks against increasing resistance of the elastic sheath 22, so that the gap between the longitudinal edges 26, 26 'decreases as the band 24 slides along a circular inside 21 (FIG. 7A) of the sheath 20, until the play stutches achieves the resulting desired predetermined value p2 when the jacket 20 has solidified, as shown in FIG. 7B. Also in this the belt must have been pretreated in such a way that the edges do not rise or that the belt's striving to return to its flat shape is not too great.

During both the initial shaping of the sheath 22 and the final shaping of the sheath 20, the tensile forces acting on the cable 10 are partly absorbed by the tensile rigid sheath 22, which is affected by a pulling force F (FIG. 6), so that any cabling in the cable body 12 does not risks opening. This may otherwise be the case, especially in view of the fact that the not yet solidified jacket 20 can be easily overstretched. A cable 10 as previously described has the advantage that the cable body 12 lies loosely inside the paper tube / casing 22 and thus loosely inside the sheath 20. Upon removal of the sheath 20 during peeling of the cable, the friction between the paper tube 22 / sheath 20 and the cable body 12 to become so small that the jacket 20 and the paper tube 22 can be easily pulled off. Furthermore, a considerable material saving is achieved because the filler has become redundant. No talc will be needed, which is very much a hygienic issue. In addition to this, the paper tape will fulfill another very important function. For example, an SZ-wired cable body lies loosely inside the paper tape / sheath. If it was theoretically possible to manufacture a round sheath by hose extrusion where the cable body lies loosely inside the sheath but without paper tubes (this is possible with some polymeric materials), the tensile force needed to pull the cable during the manufacturing process will load the SZ-wired parts in succession that the SZ cabling will open. IVIantein will not be able to absorb any traction, as long as it has not been cooled sufficiently. As long as the sheath is so hot that it can be stretched, it will thus be stretched at the same time as the SZ cabling opens.

Since the paper strip used to form the paper tube has a high tensile strength, the paper tube will absorb the tensile force required and the SZ wiring will be exposed to only low tensile force.

In FIG. 8 shows a piece of cable 10 according to the invention where scalability is not prioritized but rather roundness / bendability. The cable 10 can be hose extruded and wired. Furthermore, in this case, the resulting game p2 (not shown) may be zero or close to zero.

In comparison with the known cable 10 shown in FIG. 2, however, the flexurally rigid height 22 is now able, during the production phase, like a vault, to more or less prevent the shrinking jacket 20 from being pulled in towards the body, which is shown in the three line shaded areas in FIG. 9, so that the jacket 20 can be solidified into a completely round shape (FIG. 8) or a partially round shape (FIG. 9). While the roundness of the cable can be determined by various other known methods, for example, a feeding of the thickness of the shaded areas in FIG. 9 in relation to a maximum diameter Dmax is considered to be an uncomplicated method for determining the roundness of the resulting cable 10. Another simple method may be to determine the ratio between the respective minimum and maximum outer diameters Dmin and Dmax of the cable. The tripartite cable in FIG. 9 having a roundness t / Dmax of the order of 0.075 may be an example of a cable which meets the requirements of a cable according to the invention.

A cable according to FIGS can also be a coarser cable than those described in the examples above. Such coarser cables may have uneven cable bodies. In this case, you also do not need to strive for good scalability, but instead material savings and the flexibility of the finished cable. According to the invention, the bendability is improved by reducing the compressive pressure of the sheath, so that the cable parts are allowed to slide more easily relative to each other and relative to the casing / sheath when the cable is bent. In the case of such coarser cables, which can typically have a diameter of up to about 40-45 mm, the sheaths have a significantly greater wall thickness. Then the paper tape can also be significantly thicker, for example about 0.25 mm. The sheath can then elastically shrink the paper tube all the way into contact with the cable body so that the resulting clearance p2 = 0, but thanks to the larger paper thickness, the sheath would still not cause the paper tube to lose its round shape.

The invention is not limited to the cable types described above, but can also be applied to other cables, for example optical cables, telecommunications cables and wires as well as other electrical cables and combinations thereof.

The above detailed description is primarily intended to facilitate understanding and any unnecessary limitations of the invention are not to be construed as such. The modifications that become apparent to one skilled in the art upon review of the specification may be practiced without departing from the spirit of the invention or the scope of the appended claims.

Claims (13)

15 PATENT REQUIREMENTS A cable (10), comprising a sheath (22) having a tubular band (24) of a material selected from a group of materials consisting of cellulose, polymeric material or a combination thereof, a sheath (20) of polymeric material around the sheath (22) and a cable body (12) inside the casing (22), characterized in that the casing (22) has such an elasticity that it is able to resiliently withstand a compressive force from the casing (20) when the casing shrinks during formation thereof, in order to thereby establish - hold a predetermined clearance (p2) to the cable body (12) and / or a resulting roundness (tlDmax) of the sheath until the sheath has solidified. Cable according to claim 1, wherein the casing (22) is flexurally elastic and compressed by bending the band (24) to a smaller radius of curvature. A cable according to claim 1 or 2, wherein the band (24) extends in the longitudinal direction of the cable (10). A cable according to any one of the preceding claims, wherein the strap (24) is furthermore arranged with such a tensile strength that it is able to absorb tensile forces acting on the cable (10) during a manufacturing phase. Cable according to one of the preceding claims, wherein the longitudinal edges (26, 26 ') of the strip (24) overlap. Cable according to claim 5, wherein the longitudinal edges (26, 26 ') are connected by a resilient adhesive joint (28). Cable according to one of Claims 1 to 4, in which longitudinal edges (26, 26 ") of the strip (24) are provided with an intermediate gap. A cable according to any one of the preceding claims, wherein the ribbon (24) is of paper. The cable of claim 8, wherein the paper is of the long fiber type. 16 A cable according to any one of the preceding claims, wherein the band (24) has a thickness of about 0.05 - 0.25 mm. 11. Kabe! according to any one of the preceding claims, wherein the predetermined clearance (p2) is radially about 0 - 0.5 mm. Method for manufacturing a cable (10), characterized by arranging a cable body (12); enclosing the cable body (12) with an elastically compressible housing (22) having an initial play (p1) to the cable body, the housing comprising a tubular band (24) of a material selected from a group of materials consisting of cellulose, polymeric material or a combination hence; drying a sheath (20) of polymeric material on the casing (22); and shrinking the sheath (20) to elastically compress the sheath (22), the sheath being capable of resisting shrinkage, thereby maintaining a resulting clearance (p2) to the cable body (12) and / or a resulting roundness ( t / Dmax) of the jacket until the jacket has solidified. A method according to claim 12, wherein the housing (22) is compressed by bending the belt (24) along a circular inside (21) of the jacket (20) to a smaller radius of curvature.