FI85388C - Device for manufacturing a cable by twisting elements - Google Patents

Abstract

For introducing a filler into a strand of twisted individual elements, in which the said elements are brought together at the twisting point to form a strand or a layer and the filler is simultaneously introduced, the filler is fed directly to the twisting point from the take-off side of the strand.

Description

1 85388

Device for winding strands into a cable

The present invention relates to an apparatus for SZ-twisting strands into a cable, the apparatus comprising a rotating distribution plate, a fixed guide tube with a winding nozzle at the front end, and a rotating winding device for guiding a support wire circulating the cable to the winding point.

Such a device has long been known (GB Patent Publication 632,022); in this case, for example, in connection with the manufacture of the electric cable, a non-flowable silicone component is pressed between the individual elements coming to the point of rotation also in connection with the associated temperature treatment. For this purpose, a filling funnel tapering towards the circulating nipple is used, through which the individual elements 15 pass and into which the silicone mass is introduced under pressure. In addition to the fact that a mass that remains unstretched under thermal action does not guarantee a secure filling of the entire length of the cable without the formation of cavities, a large amount of space is required to carry out this method.

This also applies to another known device (GB patent publication 589 955), in which the suspension is introduced between the insulated conductors of the cable in connection with the twisting of the cable, the suspension containing the conductor insulator in dissolved form. The heat treatment associated with the circulating event eventually results in the formation of a flexible elastomeric sealing mass in the cable structure.

30 Starting from this state of the art, the object of the invention is to find a possibility for achieving a reliable longitudinal sealing of twisted individual elements by simple, technically advantageous and space-saving means.

2 85388 This object is solved according to the invention in that the guide tube has at least one longitudinal bore, the rear end of which is connected to a tank containing the filling mass and the front end of which terminates inside the refolding nozzle in the area of 5 refolding points. Even at high production speeds, safe import of the filling mass is possible, longitudinal tightness is guaranteed, regardless of whether it is a twisted rope or individual elements in the form of a layer wound around the core or core wire.

10 The rotation of the individual elements in a variable thread direction (SZ) and the storage of the rotatable elements at a predetermined distance, for example in the form of a so-called pipe warehouse, results in very short rotation points. As is necessary in connection with such a method 15, one or more support wires are arranged on the twisted rope or layer, e.g. as a bandage or cord. In the implementation of the invention, in connection with the placement of the mass between the individual elements, these are wound together with at least one support wire. In this case, e.g. it is essential that the outlet point of the support wire with the at least one individual element is in the discharge direction in front of the filling point of the pulp. This practically simultaneous effect of the mass of the support wire and the retraction nozzle results in a dense, longitudinally also in the case of high pressures a dense twisted unit.

In this case, it has further proved expedient that the mass can be tempered until it is matched between the individual elements. In this way, it is possible to compensate for the fluctuations in the fluidity of the various mass compositions or batches and, for example, to take into account the still cold mass during start-up.

According to a preferred embodiment of the device according to the invention, the drilling can be heated in the region of the wall of the guide tube so that the heating can be carried out by means of heating elements or media arranged in the respective longitudinal bores of the guide tube.

The invention will be explained in more detail in connection with the method for SZ-rotation of light waveguides shown in Figures 1 and 2 as an exemplary embodiment.

5 In order to rotate in a variable helical direction (SZ), rotating elements 1, for example cavities containing light waveguides (LWL), come from a guide tube (not shown) of a so-called tube storage braiding machine and are introduced into a rotating braiding or perforated plate 2. The number 3 denotes 10 with or without photoconductors and on which the rotating elements 1 are twisted into a layer. The fixed point with respect to the rotating perforated plate 2 is a rotating nipple 4, which at the same time forms an entrance to the guide tube 5. This guide tube 15 is at the same time a base tube of a central winding machine 6. Corresponding bearings 9 are used to rotate the central winding machine 6 onto the guide tube 5. In order to fill the wedge spaces between the rotating elements 1 of the SZ-twisted layer for longitudinal sealing, the guide tube 5 has longitudinal bores 10 These supply channels 25 terminate at the inlet end of the guide tube 5 in a rotating nipple 4. The filling mass reaches the rotating point through the connecting bores 12, where the rotating element 1 is brought into one layer but also possibly into a bundle or simply into a wire. Practically simultaneously with the fitting of the filling mass 30, the layer consisting of the rotating elements 1 is wound with a holding screw 7, which at the end of the rotating pan 4 tightly binds the filled braided joint consisting of the rotating elements 1 and the core wire 3.

The filling mass is suitably temperable 35 to ensure a uniform viscosity for the entire travel of the filling mass 4 B 5 3 8 8. This also applies to the possible start of a new production length. In the embodiment shown, a heating rod and 13 are used for this purpose, which are inserted into the respective bores 14, 5 of the guide tube 5 and e.g. a thermostat 16 or similar temperature sensors inserted into the bore 15 of the guide tube 5.

Since the guide tube 5 is fixedly mounted inside the central winding machine 6, the mass-conducting bores 10 can be connected to the tank 11 by means of simple connecting elements 17 and pipelines 18.

Figure 2 shows the guide tube 5 once again in section. With respect to the concentric central bore 19, the bores 10 for the filling mass, the bores 14 for the heating rods and the bore 15 for the heat sensor 15 are arranged. Of course, a different arrangement of the feed channels, heating elements or temperature sensors is also possible.

Claims (3)

5,85388 An apparatus for SZ-twisting strands (1) into a cable, the apparatus comprising a rotating distributor plate (2), a fixed guide tube (5) with a winding nozzle (4) at its front end, and a rotating winding device (6) for guiding a cable (7) rotating the cable to the winding point , characterized in that the guide tube (5) has at least one longitudinal bore (10, 12), the rear end of which is connected (17) to the container (11) containing the filling mass and whose front end terminates inside the refolding nozzle (4) in the area of the refolding point. Device according to Claim 1, characterized in that the bore (10, 12) can be heated in the region of the wall of the guide tube (5). Device according to Claim 2, characterized in that the heating can be carried out by means of heating elements (13) arranged in the respective longitudinal bores of the guide tube (5). «25388