JPS63119114A - Manufacture of laminate sheathed cable - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a laminated sheathed cable that is laid in places where water resistance and chemical resistance are required, for example.

In general, for water-resistant or chemical-resistant cables, a laminate tape 4, which is made by laminating a plastic tape 3 on a metal tape 2, is placed on a cable core 1 vertically so that the metal tape surface is on the inside, as shown in Figure 1. It is known that a protective layer 5 is additionally provided thereon. Incidentally, in such a cable, the overlapping portion 6 of the laminate tape must be joined over the entire length.

Conventionally, this overlapping part is joined by heat fusion using a heat source such as a hot jet or a gas burner, but this joining method has the disadvantage that wrinkles occur in the joined part and water etc. infiltrate from this part. there were.

The present invention has been made based on the above-mentioned circumstances, and it is an object of the present invention to provide a method for manufacturing a laminate sheathed cable that completely joins the overlapping portions of laminate tapes.

Hereinafter, the present invention will be described in detail based on the drawings of one embodiment. In FIG. 2, the cable core 7 is, for example, a so-called 6, 6, which has an insulator provided on the conductor via an internal semiconducting layer if necessary, and a shielding layer provided thereon via an external semiconducting layer.
It is composed of a KV class cable insulated wire core, and a laminated tape 8 is vertically attached to the outside of the cable core.

As shown in FIG. 3, the laminated tape 8 consists of a metal tape 9, plastic tapes 10a and 10b laminated on both sides of the metal tape 9, and a heat-generating tape embedded along the length of the tape at one edge of the tape. It is composed of a line 11. As the metal tape 9, for example, a lead tape, copper tape, or aluminum tape with a thickness of 50 μm is used.
As the plastic tape, for example, an ethylene/acrylic acid copolymer tape having a thickness of 70 μm is used. Further, the heating wire 11 has a diameter of 0.12 mm, for example.
Copper wire, aluminum wire, etc., which are considered to be

After the laminate tape 8 is vertically attached, a protective layer 12 made of soft vinyl chloride or the like is provided thereon via a pressing layer (not shown) such as a metal tape, if necessary.

By the way, the overlapping portion 13 of the laminate tape 8 can be removed after a restraining tape winding layer is provided thereon, or after the protective layer 12 is formed.
After the heating wire 11 is provided, a current is passed through the heating wire 11 to thermally fuse the heating wire 11. That is, for example, two wires are placed at both ends of the heating wire 11.
An alternating current voltage of 0.00 volts is applied and a current of about 15 amperes flows, thereby raising the heating wire to the required temperature.

Then, the plastic tape near the heating wire melts due to the heat generated by the heating wire. After that, when the power is turned off, the overlapping parts of the plastic tape are completely heat-fused.

In this embodiment, while the overlapping portions of the plastic tapes are being heat-sealed, radial pressing force is constantly applied by the restraining tape winding layer or protective layer 12 provided thereon. , there is an advantage that wrinkles do not occur in this overlapping part.

Note that the wire diameter, number, material, etc. of the heating wires are appropriately selected depending on the heat i1a@temperature of the overlapping portion of the tapes, and are not limited to the above-mentioned embodiments.

In the above-mentioned invention, the heating wires embedded in the overlapping parts of the laminate tapes generate heat to heat-seal the overlapping parts, so that the bonding properties can be improved, resulting in improved water resistance and resistance. A laminated sheathed cable suitable as a chemical cable can be provided.

[Brief explanation of the drawing]

FIG. 1 is a partially omitted cross-sectional view of a conventional laminated sheath cable, FIG. 2 is a partially omitted cross-sectional view of a laminated sheathed cable manufactured according to the present invention, and FIG. 3 is a cross-sectional view of a laminated tape. 7・・・・・・・・・・・・・・・・・・・・・Cable core 8・・・・・・・・・・・・・・・・・・・・・
Laminating tape 9・・・・・・・・・・・・・・・
...Metal tape 10a, 10b...Plastic tape 11........
・・・・・・Photothermal ray 12・・・・・・・・・・・・・・・
・・・・・・Protective layer Fig. 1 Fig. 3 1υa

Claims (1)

[Claims] 1. A laminate tape made by laminating plastic tape on both sides of a metal tape is attached vertically to the outside of the cable core so that the base edge overlaps one edge of the laminate tape, and one of the laminate tapes is A heating wire is embedded along the length between the edge and the base edge, and the overlapping portion between the one edge and the base edge of the laminate tape is thermally fused by the heat generated by the heat generation wire. Method of manufacturing laminated sheathed cable. 2. A patent claim in which the laminated tape is composed of a metal tape, a plastic tape laminated on both sides of the tape, and a heating wire embedded in one edge of the plastic tape along the length of the tape. A method for manufacturing a laminate sheathed cable according to item 1.