DE1809058A1 - Sealed cable junction box for cables with - plastomer insulation - Google Patents

Abstract

The outer plastic insulation is stripped and the copper braiding together with the inner plastic insulation bared. A foil of Hostalen (RTM) is clipped tightly around the outer insulation sheath. Cast resin is now pressed through an injection needle at high pressure (3 1/2-4 atm) between the cores of the core bundle unit the space enclosed by the foil has been filled up.

Description

Method for the pressure-tight termination of a cable.

Addition to patent (patent application P 17 65 652.9) The main patent (patent application P 17 65 652.9) relates to a method and an apparatus for production of pressure-tight terminations for cables by potting with resin, and is directed at cables with paper-insulated cores.

For the production of pressure-tight terminations for cables with plastic-insulated However, cores and plastic outer sheath or a corresponding structure is in the main patent The specified procedure cannot be used without further ado, but has to be slightly modified will.

The subject of the present invention is this modified method, the device according to the main patent also being used in the present method will.

To seal the termination in such cables, a Proposed method according to which the plastic outer jacket to the desired Place is deposited, the copper screen is exposed and together with the plastic inner jacket is cut, a film is placed around the jacket tightly afterwards and is set, and casting resin with high pressure between the veins of the vein bundle is pressed until the space enclosed by the film is filled with casting resin. The film on the cable for the introduction of the casting compound to a funnel or. shaped cylindrical structure. The film used is preferably a Hostalen film, in a special embodiment as a perforated tape around the outside of the veins is looped, the film being fixed to the cable with wrapping tape.

A cylindrical design has the advantage that the diameter of the bundle of wires is retained, so that it is possible to retrospectively if necessary to push an object over the bundle of veins, the diameter of which is only about one Slightly larger than the diameter of the vein bundle. By discontinuing the Plastic outer jacket at the desired point, the copper shield is free, it an earth wire is soldered to it, and the screen is soldered on above it Rope (made of copper) cut round.

The PE outer jacket is sanded off and the film similar to the paper cables according to the main patent and fixed.

Then the needle is also similar to the process according to the main patent introduced into the core of the vein, distributed several times around the circumference in front of and behind the copper shield between the two plastic sheaths. The pressing in of the casting resin in the bundle of veins is preferably carried out in the same way and with the same Device as carried out according to the main patent.

According to a further embodiment of the invention in which it is about goes to manufacture pressure-tight terminations for multi-pair plastic cables the needle in each individual wire bundle and / or in front of and behind the two plastic sheaths introduced and pressed the casting resin in the manner described above. With such Cable the individual wires are combined into several bundles and the large number plastic-insulated copper wires mean that the needle retracts in the middle of the cable alone is not sufficient, but each individual wire bundle must be treated.

The invention is explained below in conjunction with the drawing two embodiments explained schematically.

Fig. 1 shows a plastic bundle cable in which the invention Method is applied, in a section along the central axis, and Fig. 2 a Corresponding, multi-pair plastic cable in radial section.

The wire bundle 1 is surrounded by a PE-Ewlststoffinnenmantel 2, to which the copper shield 3 adjoins to the outside, is on this copper shield one not shown ~. Earth wire soldered on. The copper shield 3 follows to the outside the PE outer sheath 4. The entire cable 1-4 is approx. 10 - Fastened 12 cm below the landing. A film 6, which is preferably a Is cling film and has a segment-shaped or

represents a rectangular blank is wrapped around the outer jacket, is set about 2 cm below the settling point and protrudes beyond the settling point essential. This cone or cylinder formed by the film 6 is through a Wrapping tape 7 fixed on the outer jacket 4 and unwound in a pressure-tight manner. In the from the space 8 formed in the film 6 is filled with casting compound; the penetration of the casting compound into the vein bundle is facilitated by the fact that the vein bundle with a bone folder is loosened and the injection needle 9 (from the AbsVeitante of the outer jacket about 5 to 6 cm deep) inserted; then the injection needle is used 9 the casting resin with a pressure of 3.5 to 4.0 atmospheres between the veins of the bundle 1 pressed.

The casting resin is taken from the injection needle 9 in the main patent introduced into the bundle of wires 1 as described. Furthermore, the needle 9 is additionally in front of and behind the copper shield 3 several times distributed around the circumference and introduced while casting resin is pressed in.

The embodiment according to Fig. 2 shows a multi-pair plastic cable, that is to be sealed pressure-tight. This cable works in the same way as explained in connection with FIG. 1, treated according to the method according to the invention, however, the individual wires are compressed into several bundles, each Wire bundle can contain 100 to 200 insulated copper conductors.

Claims (8)

Patent claims: 1. Process for producing pressure-tight terminations for plastic cables by potting with resin, according to patent ...... (Patent application P 17 65 652.9), characterized in that the plastic outer jacket (-4) is deposited at the desired point that the copper screen (3) is exposed and is cut round together with the plastic inner jacket (2) that a Riie (6) is arranged and fixed tightly around the jacket (4), and that casting resin (8) with high pressure (3, 5-4 atU) between the wires of the wire bundle (1) is pressed until the space enclosed by the film (6) is filled. 2. The method according to claim 1, characterized in that the film (6) is formed on the cable into a funnel-shaped or cylindrical structure. 3. The method according to claim 1 or 2, characterized in that as Foil a Hostalen foil is used. 4. The method according to claim 1 or one of the following, characterized in, that the film (6) is a perforated band. 5. The method according to claim 1 or one of the following, characterized in, that the copper screen (3) is fastened by soldering with an earth wire after it has been exposed and that the screen (3) is cut above the soldered earth wire. 6. The method according to claim 1 or one of the following, characterized in that that the outer jacket (4) is sanded off before the film (6) is set and the casting resin is introduced. 7. The method according to claim 1 or one of the following, characterized in, that the needle (9) distributed several times around the circumference in front of and behind the copper screen (3) inserted between the two plastic sheaths (2, 4) and cast resin on them Places is pressed in. 8. The method according to claim 1 or one of the following, wherein the plastic cable high-paired plastic cables are characterized in that the needle (9) in each individual wire bundles (1) and / or in front of and behind the two plastic sheaths (2, 4) is introduced and casting resin is pressed in with it.