FR2672724A1 - Cabling and in-line tape-wrapping installation for the manufacture of cables, especially power cables, and cables obtained thereby - Google Patents

Abstract

The installation is characterised in that it comprises, between the stranding machine (1) and the receiving means (6), at least: - a fixed tape-wrapping station (3) which pays out, onto the strand (110), a tape (109), tape-wrapping it in the same direction as the direction of twist of the strand (110); - a movable tape-wrapping station (4) laying, onto the strand, a tape in the opposite direction to the direction of twist of the strand and with the same pitch as the outer layer of the latter.

Description

"Installation of in-line wiring and tape for the manufacture of

  cables, especially electric cables

  ques et cables thus obtained ". The present invention relates to an installation

  cabling and ribboning to make cables, comprising: a stranding machine for making a strand of

  cable from elementary strands, the strand turns

  nant on itself, being led along a scrolling and rotating axis through different taping stations to receive in each station,

  a ribbon, and at the output a receiving means, exercising

  cutting traction with rotation on the cable.

  In general, cable installations

  weaving and taping industrially implement two main methods of obtaining cable

  wheat insulated by tape used industrially. The most common method consists in presenting in linear scrolling, without rotation, a to-

  ron, already formed by other means, in a rotary tape head The combination of the two movements allows the helical laying of the ribbon on the strand In

  this method, there is no particular constraint with regard to the relative directions of tape and stranding, no more than on the value of the pitch of

ronnage and tape.

  The realization of successive layers is

  possible by chain-mounting sets of rubana-

  ge or by laying each layer in recovery There is a limitation in productivity due to successive operations (wiring then tape) and especially to

  the limited speed of rotation of the tape heads.

  A known installation, described in patent FR 8811396 makes it possible to improve productivity significantly, by presenting the strand in the machine with a helical advance law, that is to say

  advance and rotation combined Combinations of head

  your conventional tape and special "reverse" heads allow you to deposit ribbons

  relative steps and senses with few limitations.

  The rotational speeds of the tape heads remain

industrially achievable.

  More specifically, the wiring installation according to patent FR 88 11 396 comprises a station

  of stranding providing a strand of elementary strands

  res along a deflection and rotation axis

  defining the general direction of travel in the installation

  Following the stranding station, there is a taping station which rotates around the strand in the opposite direction to the strand to lay a first ribbon. Following this ribboning station, a second ribboning station is provided for depositing a ribbon. opposite of the first ribbon This second ribboning station is a

  reverse taping station comprising very schematic-

  an external assembly rotatable relative to the general axis and provided with means for guiding the cable upstream and downstream of the taping to be produced with an inlet and an outlet arranged in the direction of circulation

  cable in the installation as well as a

  seems interior, rotatable with respect to the general axis independently of the exterior assembly; this interior assembly comprises a taping means the inlet and outlet of the cable of which are placed in the opposite direction from the

  general direction of cable travel in the installation

  tion. Patent FR 89 05 200 relates to a machine

  stranding formed by a first sub-assembly in

  tation with respect to a second subset around

  the axis of the wiring installation The second sub-

  assembly is provided with the coils loaded with the wiring elements which are guided and stranded in a stranding die in a direction of travel opposite to the direction

  of the whole installation scrolling for

  run a path back inside the first sub-assembly and exit from it in the direction of

  general scrolling in the installation.

  The installation object of document FR 89 05 can be mounted at the head of the installation described

  to patent FR 88 11 396 to value it in general

  completely killing the strand at the head of the machine The strand can then be made in alternating layers and

  we then have a completely in-

  tégrée allowing to realize multi-strand iso-

  strips by taping from elementary constituents

  res: elementary threads and ribbons, in a single operation

tion.

  The object of the present invention is to develop

  per the facilities mentioned above to simplify them and; improve the accuracy of

laying some ribbons.

  To this end, the invention relates to an in-

  stallation of the above type characterized in that it-

  includes between the stranding machine and the receiving means, at least: a) a stationary taping station which unwinds a ribbon on the strand by making its ribboning in the same direction as the direction of twist of the strand, b) a station of movable tape depositing on the strand a ribbon in the direction opposite to the direction of torsion of the strand and not the same as the outer layer thereof. This installation has a very simple structure making it possible to tape very fragile materials with extreme precision, for example

  thick polytetrafluoroethylene (PTFE) tapes

50 micrometers.

  The fixed mounting of an additional taping station

  overrides the need for a ribbon reserve, coaxial with

  strand (as in the mobile taping station).

  Joining is thus easier to perform.

  ser, it does not lead to forced cuts on the finished wire. Another advantage is that it becomes easy

  to keep the ribbons at the optimum temperature.

  According to another characteristic, the installation

  lation includes a second station for fixed taping

  dant a ribbon on the cable in a winding direction-

  identical to the direction of the strand, the first and the second

  landline cond being located on either side of

mobile taping station.

  According to another characteristic of the

  vention, the mobile taping station is a

  reverse tape formed of an outer part and a

  internal part, both coaxial with the axis of the installation and the strand circulating first in the

  outer part before crossing the inner part

  along the axis but in the opposite direction to the direction of circulation of the strand on the other parts of the axis, to receive the ribbon, the movement of rotation of the external part being opposite to the direction of rotation of the

strand (cable).

  According to another characteristic of the

  vention, at least one of the fixed taping stations is

  consists of an assembly formed by a coil of power-

  tion driven, connected to the taping point by the in-

  through a tensioning means.

  According to another characteristic of the

  vention, the tensioning means includes a

  positive control to determine the actual voltage, compare it to a setpoint and, starting from the difference signal, control the motor of the supply coil.

  According to another characteristic of the

  vention, the assembly formed by the power supply and the voltage control means is pivotable relative to the taping point to adjust the taping angle.

  According to another characteristic of the

  vention, the means of tensioning and detection

  of tension consists of a loop of ribbon

  driven by two fixed rollers and a varia-

  ble forming a loop path of variable length for the ribbon and the length of which is detected for

  control the motor of the mobile power supply.

  According to another characteristic of the

  vention, the means for tensioning and detecting the real tension of the ribbon at the time of the taping comprises an arm carrying the idler roller over which passes a loop of the ribbon between the two fixed rollers, this arm being provided with a counter -weight of tension adjustment and a pivoting detector relative to

a fixed point.

  According to another characteristic of the

  vention, the station of fixed tape consists of a device for supplying tape, fixed, providing a tape to a voltage controlled by a set voltage, at least one return member to adjust the orientation, and the angle tape, tape by

compared to the strand.

  According to another characteristic of the invention, the return member is an orientable finger

  which ensures the return of the ribbon, cooperating with two or-

  guiding and stop ganes retaining the cable in

taping lessons.

  According to another characteristic of the

  vention, the taping stations include a means of

  ribbon temperature regulation.

  The invention also relates to cables

  made using this installation.

  Thus, such a cable is characterized in that it comprises at least one layer of insulating tape of

  same direction as the strand and a layer of opposite direction.

  According to another characteristic of the

  note, the cable has at least two layers of

  tape in the same direction and not the same as the outer layer

  strand, with an intermediate layer of opposite direction, the layers of the same direction having exactly the

  not even, if necessary identical to that of the strand.

  The present invention will be described in a manner

  re more detailed with the aid of the appended drawings in which:

  Figure 1 is a schematic view of

  appears to be a wiring and tape installation

according to the invention.

  Figure 2 is a schematic view of a

  first embodiment of a fixed rubana-

  ge. Figure 3 is a top view of the station

tape according to figure 2.

  Figure 4 is a variant of the means of

  Ribbon tension detection in the ribbon station

ge according to figures 2 and 3.

  Figure 5 is a schematic view of a

  another embodiment of a taping station.

  Figure 6 is a sectional view of the taping point in the case of a fixed taping station according to Figure 5 for a rotation of the cable in the

  counterclockwise.

  Figure 7 is a view similar to that of Figure 5 but for a rotation of the cable in the

clockwise.

  According to FIG. 1, the on-line wiring and taping installation for making insulated cables comprises a stranding machine 1 which is only represented schematically by the three

  strands or elementary strands 101, 102, 103 meet-

  health at the level of stranding 4 At the output of this stranding machine 1, it is possibly

  provided with a stranding control device 2

  very schematically placed two rollers 105, 106

  inlet and outlet and an intermediate roller 107.

  The roller 107 is offset from the geometric axis.

  that the machine and the crew formed by the rollers, 106, 107 rotate around the axis in synchronism

  with the stranding, so as to block the strand.

  The entire installation refers to the geometric axis XX which crosses the installation from the stranding machine 1 to the receiving means 6 The different means of the installation

  are aligned on this axis XX which corresponds to the tra-

  jectory followed by the strand transformed by

successive taping in one cable.

  Downstream of the device 2, there is a first

  mier station of fixed taping, 3 shown schematically-

  ment by a rectangle 108 and a ribbon 109 which joins the strand 110 at the taping point 111 It should be noted that the strand 110 rotates in a certain direction

  and that the ribbon 109 is banded around it followed

  with a direction of tape identical to the direction of stranding

ge.

  This station 3 places the ribbon 109 according to the year

  gle of taping A The angle A depends on the pitch resulting from the rotation R and the scrolling D, we have approximately  (D + e) tg A = p with D = diameter of the strand e = thickness of the deposited tape

  p = Not resulting from the advance / rotation combination

  tion. Downstream of the fixed or first taping station

  taping station there is a mobile taping station

  the 4 which carries out taping in the opposite direction to the ruba-

  swimming formed by station 3 This taping station 4 is

  represented in the form of a reverse taping station

  Very schematically, this item 4, which does not constitute

  that a particular and interesting example of

  health of a taping station, consists of a set

  exterior 112 and an interior assembly i 13, the set

  ble exterior 112 is a cage rotating around

  axis XX by being driven by means not shown

  smelled. The strand 114, provided with the first ribbon, passes into the exterior assembly 112 of the station 4, first on the input pulley 115, on two return pulleys 116, 117 then a pulley 118 for input into the second part 113 of station 4 This second part 113 rotates relatively opposite with respect to the part 112 In fact and in a simple manner, the part 113 is stationary in space and the part 112 rotates around

  of it and around the axis XX The strand 114 circu-

  inside the station 113 in the opposite direction to the general direction of travel of the strand along the axis XX The ribbon is banded around the strand 114 in the opposite direction to the direction of banding performed by the stationary station 3 At the outlet, the strand 119 passes over an output pulley 120 then two return pulleys 121, 122 and a

  output pulley 123 to join the XX axis The dif-

  the different pulleys mentioned above all rotate with the exterior assembly 112 as indicated by the arrow C.

  Downstream of the mobile taping station 4 the

  stallation includes a fixed taping station 5 analog

  gue at post 3; it is represented schematically by a rectangle 124 providing a strip 125 at the appropriate tension according to the taping angle B, at the taping point 126 This results in the stranded cable 127 which

  passes through the receiving means 6 rotating in syn-

  chronism around the XX axis to be wound in syn-

  chronism with cage 112 and devices 1 and 2.

  Figures 2 and 3 show a first embodiment of a stationary taping station; it's about

for example from station 3.

  Figure 2 is a very dry end view.

  matic showing the strand 110 in the form of a circle

  key; the strand rotates in the direction of the circular arrow R The ribbon 109 arrives on the strand at the taping point 111 This ribbon 109 is supplied with a feed roller 301 carried by an axis 302 connected to a motor 303 The motor is controlled by a control circuit 304 to adjust the tension of the ribbon For

  this, the taping station includes a tensioning means.

  ribbon zion made up of a first pulley 305, a second pulley 306 and an intermediate pulley 307 forming a movable block; in this example the pulley

  307 is free in vertical movement and forms a bou-

  tape key 308 Pulley 307 is subjected to a weight 309 Pulley 306 is fitted with a tachometer detector 310 The position of pulley 307 is detected

  by a detector 311 which transmits the detection signal

  tion to circuit 304 and the latter controls motor 303. Control circuit 304 receives the signal

  of the tachynetric detector 310 and relevant data

  the ribbon (its dimensions, its density) as well as data relating to the supply coil 301, as well as the law of variation of the moment of inertia of

  the coil depending on the residual amount of ru-

  ban on the coil These signals are introduced into circuit 304 as shown by the arrow

  312, this system makes it possible to regulate, according to a first-

  re approximation, the tension of the ribbon 109 in command

  the angular speed of the 303 motor so that it

  is proportional to the altitude of the pulley 307.

  This method is possible when you can have a large vertical stroke for the pulley

  free 307 because it is necessary to ensure the stability of

  operation of the taping station whatever the vi-

  tape run size and diameter of the box

  feeder 301 which supplies the ribbon.

  However, by introducing more complete information into the control circuit 304, as already mentioned above, it is possible to achieve a

  more precise control, especially if the

  Mande 304 has a microprocessor which allows an optimal order to be calculated in real time.

  optimal control can be defined by the two conditions

  following statements: it the assumption that the pulley 307 occupies a fixed position, damping the system; these two conditions are taken into account regardless of the tape running speed and the degree of

filling the coil 301.

  Under the conditions of precision set out above, if it is accepted that the return pulley 307

  occupies a fixed position, we can simplify the

  sitive represented in figure 2 by that of figure

4 which is a modified extract thereof.

  In this figure we used the same re-

  References than in Figure 2 for common areas

to both variants.

  According to this variant, the "movable" pulley 307 which in fact retains a very variable position, is carried by a lever arm 313 pivotally mounted around a pivot 314 formed by an axis 315 connected to

  an angle detector 316 The lever 313 also includes

  Lement a counterweight 314 adjustable along the lever as indicated by the double arrow C By modifying the position of the counterweight 314 we can thus modify the tension exerted by the pulley 307 on the tape 109 Le

  rotation sensor 316 provides an indication of the pi-

  vote of arm 313; this indication is provided to the engine control circuit controlling the coil of

  unwinding the tape (see Figure 2).

  The variant of Figure 4, given the

  low deflection, no problem of pre-

  cision that pulley 307 does not describe a

  straight path but an arc; Indeed-

  fet, the movement of the pulley 307 on the trajectory is so weak that the assimilation of an arc of a circle to a line segment at this level does not involve

not enslavement errors.

  Figure 3 is a top view of the fi

  gure 2; it shows the different organs described

  above and the description of which will not be repeated.

  The advantage of this figure is to show the angle A formed between the strip 109 and the strand 110 at the taping point 111 The direction of travel of the strand 110 is indicated by the arrow D. It should also be noted that in the ' above devices, permanent adjustment of critical damping keeps to a minimum level

  the voltage errors due to the acceleration of the e-

  swiveling equipment (pulley 307; flyweight 314).

  Note that the taping angle A

  is set in the embodiments of the ru-

  fixed formwork shown in Figures 2-3 or 4 by the tilting of the entire installation formed by

  the post around the taping point 111.

  The variant of stationary taping station according to FIG. 5 allows this constraint to be released and the taping angle to be adjusted without having to move

  the entire station for taping.

  For this, in the embodiment re-

  presented in FIG. 5, the ribbon 109 unwound from the box

  bine 301 whose rotation motor has not been shown

  felt, passes around a swiveling finger 320 sensitive

  completely perpendicular to the axis of travel XX of the strand 110 The strip 109 is guided around the parts 321, 322 which gives the taping angle A Depending on the direction of twist R of the strand (FIGS. 6 and 7), the

  parts 321, 322 are arranged differently.

  According to one embodiment, the tape stations 3, 4, 5 and in particular the fixed stations 3, have a means for regulating the temperature of the tape.

  Finally, it should be noted that the des-

* above description concerns an installation with three taping stations; this is just an example

  non-limiting and the number of positions can be increased

lied or diminished.

  Thus, it is possible to envisage an in-

  very simple stallation comprising only a stationary taping station 2 and a mobile taping station, the order of succession along the axis XX is optional. In addition, the alternation of fixed positions

and mobile can exceed three.

  The invention also relates to cables

  made using the installation described above.

  These cables have at least two layers of alternating insulating tape, the first layer being in the same direction

  or opposite to that of the second layer.

  The direction of taping of the first layer

  may be the same or opposite to the direction of the strand.

  Finally, it should be noted that the embodiments described above envisage

  a strand obtained from elementary strands.

  However, these elementary strands can themselves be strands without modifying the principles

  of the facilities described above.

R E V E N D I CA T I O N S

  1) Installation of cabling and tape for making cables, comprising: a stranding machine (1) for making a cable strand (110) from elementary strands (101, 102, 103), the strand rotating on itself- even, being led along a scrolling and rotating axis (xx) through different taping stations to receive in each post, a ribbon, and at the output a receiving means (6), exerting traction with rotation on the cable (127), installation characterized in that it comprises between the stranding machine (1) and the receiving means (6), at least: a) a stationary taping station (3) which unwinds on the

  strand (110) a ribbon (109) by performing its ribbon

  swims in the same direction as the direction of twist of the strand (110),

  b) a mobile taping station (4) depositing on the to-

  ron a tape in the opposite direction to the direction of twist of the strand and not the same as the outer layer thereof. ) Installation according to claim 1, characterized in that it comprises a second station for

  fixed tape (5) rewinding a cable on the cable

  vant a winding direction identical to the direction of the strand, the first and the second fixed station (3, 5) being located

  on either side of the mobile taping station (4).

  ) Installation of wiring and tape according to claim 1, characterized in that the mobile tape station (4) is a reverse tape station formed of an outer part (112) and an inner part (113), all two coaxial with the axis (XX) of the installation and the strand (114) flowing first (115, 116, 117, 118) in the external part (112) before crossing the internal part (113), following the axis (XX) but in the opposite direction to the direction of circulation of the strand on the other parts of the axis (XX), to receive the ribbon, the rotational movement of the outer part (112) being opposite to the direction of

strand rotation (cable).

  ) Installation of wiring and tape

  according to any one of claims 1 and 2, ca-

  characterized in that at least one of the ruba-

  fixed swimming (3, 5) consists of an assembly formed by a driven supply reel (301), connected to the taping point (111) by means

  tensioning (305, 306, 307, 311, 304, 303).

  ) Installation according to claim 4, characterized in that the tensioning means comprises a control device (309, 311, 315,

  316, 304) to determine the actual voltage, the compa

  rer to a set point and, starting from the signal

  difference, order the motor from the power coil

tation.

  ) Installation according to any one of

  claims 4 and 5, characterized in that the set

  ble formed by the power supply (301, 302, 303) and the tension control means (305, 306, 307) is pivotable relative to the taping point to adjust

the taping angle (A, B).

  ) Installation according to claim 3, characterized in that the tensioning and tension detection means is constituted by a loop of tape formed by two fixed rollers (305, 306) and a variable return roller (307) forming a loop path of variable length for the ribbon (109) and

  whose length is detected (310, 316) to control

  der the motor (303) of the power supply (301).

  80) Installation according to claim 3, characterized in that the means for tensioning and detecting the real tension of the tape at the time of taping comprises an arm (313) carrying the idler roller (307) over which passes a loop tape (109) between the two fixed rollers (305, 306), this arm (313) being provided with a counterweight (314) for adjusting the tension and a pivoting detector (316) by

relative to a fixed point.

  ) Installation according to claim 1, characterized in that the stationary taping station (3) consists of a tape feeding device,

  fixed, providing a ribbon (109) at a tension asser-

  life on a set voltage, at least one deflection member (320) to adjust the orientation, thus the angle

  tape, tape relative to the strand (110).

  ) Installation according to claim 9, characterized in that the return member is a finger

  orientable (320) which returns the ribbon, cooperating

  rant with two guide and stop members (321,

  322) retaining the cable (109) during taping.

  ) Installation according to claim 1, characterized in that the taping stations (3, 4,) comprise a means for regulating the temperature

ribbon.

  120) Cable made using the installation

  tion according to any one of claims 1 to

  , characterized in that it comprises at least one

  insulating tape in the same direction as the strand and a

layer of opposite direction.

  130) Cable according to claim 12, charac-

  terized in that it comprises at least two layers of

  tape in the same direction and not the same as the outer layer

  strand, with an intermediate layer of opposite direction, the layers of the same direction having exactly the

  not even, if necessary identical to that of the strand.