JPH0419923A - Metal tape winding method - Google Patents

Abstract

PURPOSE:To improve the adhesion strength of an insulator of a core and a metal tape by using a guide pipe having a larger inner diameter than a theoretical diameter after tape-winding which is a sum of a core diameter and the thickness of the metal tape as a guide pipe. CONSTITUTION:A metal tape 3a is fixed on a core 6 of a center conductor coated with an insulator such as teflon, PE, etc., and while proper tensile force is applied to the metal tape 3a, a guide pipe 10 together with the core 6 is rotated at a constant speed on the core 6, and at the same time a cable 8 having the metal tape 3a wound on is drawn from the guide pipe 10 at a constant speed, so that the metal tape 3a is wound on the core 6 at constant pitch and with high adhesion strength. The inner diameter of the guide pipe is made larger than a theoretical diameter in the completion of the metal tape winding by 0-50mum.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a metal tape winding method.

[Prior Art] FIGS. 2 and 3 show a coaxial cable to be wrapped with a metal tape according to the present invention.

In the coaxial cable shown in Fig. 2, an insulator 2 is provided on a center conductor 1, a metal tape layer 3 is provided on the outer periphery of the insulator 2, and a jacket is provided on the outer periphery of this metal tape @3. 4 are provided.

In the coaxial cable shown in FIG. 3, between the jacket 4 provided outside the metal tape layer 3 and the metal tape layer 3,
A metal braid 5 is provided.

In the case of a coaxial cable constructed in this way, when a metal tape is wound around the core 6 of the central conductor 1 coated with the insulator 2 to form the metal tape layer 3, as shown in FIG.
The metal tape 3a is directly wrapped around the core 6.
A guide pipe 7 is provided around the outer periphery of the core 6. While rotating the core 6 in the direction of the arrow in the figure, the metal tape 3a is directly wrapped around the core 6, and the cable 8 after wrapping with the metal tape is pulled in the direction of the arrow in the figure. It is something to remove.

[Problem to be Solved by the Invention 1] In the above-mentioned prior art, the central conductor is coated with an insulator such as Teflon or polyethylene with a diameter of 5s+ or less! +]
When wrapping a metal tape such as copper over a layer, it is necessary to increase the tension of the metal tape in order to strengthen the adhesion between the insulator and the metal tape.

However, if the tension of the metal tape is made stronger than the rigidity of the core, the cable will be twisted and the appearance will be affected, so it has been very difficult to improve the tightness between the core and the metal tape.

The present invention has been made in view of the above points, and it is an object of the present invention to provide a metal tape wrapping method that makes it possible to significantly improve the adhesion between the core insulator and the metal tape. .

[Means for solving the problem] The above purpose is to use a guide pipe having an inner diameter 0 to 50 microns larger than the theoretical diameter after hoop winding, which is the core diameter plus the metal tape thickness. This is achieved by

[Operation 1] Since the above means is provided, the metal hoop is pressed against the core on the inner surface of the guide pipe, and the winding is formed, so that it is in good contact with the insulator of the core.

[Example] The present invention will be described below based on the illustrated example. FIG. 1 shows an embodiment of the invention. Note that parts that are the same as those in the conventional system are given the same reference numerals, and therefore their explanations will be omitted. In this embodiment, a guide pipe 10 having an inner diameter 0 to 50 microns larger than the theoretical tape-wrapped diameter, which is the sum of the core diameter and the metal tape thickness, was used. By doing this, the metal tape 3a is pressed against the core 6 on the inner surface of the guide pipe 10, and the winding is formed, so that it comes into close contact with the insulator of the core 6, and the core 6
It is possible to obtain a metal tape wrapping method that makes it possible to significantly improve the adhesion between the insulator and the metal tape 3a.

That is, a metal hoop 3a is fixed on a core 6 whose center conductor is coated with an insulator such as Denoron or PE, and a metal tape 3 is
The core 6 together with the guide pipe 10 is rotated at a constant speed around the core while applying an appropriate tension to a, and at the same time the cable 8 wrapped with the metal tape 3a (cable after wrapping with the metal tape) is rotated at a constant speed. By pulling it out from the guide pipe 10, the metal tape 3a can be wrapped around the core 6 at a constant pitch with strong adhesion.

In this way, according to this example, the adhesion (bond strength) between the insulator and the metal tube can be significantly improved, and the conventional problem of terminal processability of the product and connection between the cable and the connector can be improved. reliability can be increased.

The reason why the inner diameter of the guide pipe in this example was limited to 0 to 50 microns larger than the theoretical metal tape winding diameter is that immediately after the metal tape is wound, the metal tape is rotated while pressing it against the core on the inner surface of the guide pipe. This is to form the metal tape so that the metal tape and the core are in close contact with each other.

[Effects of the Invention] As described above, the present invention provides a guide pipe with a diameter of 0 to 50 mm larger than the theoretical tape-wrapped diameter, which is the core diameter plus the metal tape thickness.
Since we used a guide pipe with a micron-large inner diameter, the metal tape is pressed against the core on the inner surface of the guide pipe, and the winding is formed, so that it is tightly bonded with the core's insulator, and It is possible to obtain a metal tape wrapping method that makes it possible to significantly improve the adhesion between an insulator and a metal tape.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a state in which a metal tape is wound according to an embodiment of the metal tape winding method of the present invention, and FIGS.
The figures are vertical side views of different coaxial cables to be wrapped with metal tapes according to the present invention, and FIG. 4 is a perspective view showing how different metal tapes are wound by a conventional metal tape winding method. 1: Center conductor, 2: Insulator, 3a: Metal tape, 6: Core, 10 guide pipes. Child diagram ↑ Child diagram ↑

Claims (1)

[Claims] 1. Rotate a core coated with an insulator on the center conductor together with a guide pipe provided on its outer periphery, and place a metal tape under tension onto the core coated with the insulator along the inner surface of the guide pipe. The method for winding a metal tape is characterized in that the guide pipe has an inner diameter that is 0 to 50 microns larger than the theoretical diameter after winding the tape, which is the sum of the core diameter and the thickness of the metal tape. Metal tape wrapping method.