DE694954C - Process for the production of flexible high-frequency cables - Google Patents

Description

Process for the production of flexible high-frequency cables Bei Concentric high frequency cables consist of the outer conductors according to known constructions from single or continuous. Metal bands that help to achieve flexibility provided with transverse grooves and only then laid or bent into a tube shape. Proposals have also been published, an outer conductor in the form of a tube with transverse grooves to be attached over a continuously helical hollow insulated inner conductor. In the former case, however, the tube, which is already corrugated before the bend, can be used very difficult to form a round tube and tightly revenge on the corrugated edges associate; in the second case, a pipe jacket can occur as a result of the Hollow insulation is not easily grooved from the outside against the hollow subsurface will.

Therefore, a method for manufacturing one such will be described below Proposed conductor, which allows in a simple manner, the outer or inner conductor to make high-frequency cables flexible by grooves when it is already full Tube shape is bent. For this purpose, an internal tool must be placed in the hollow pipe grasp against which another tool, e.g. B. grooving rollers o. The like., presses. At the same time, despite the internal tool, spacers must be introduced between inner and outer conductor: be possible.

In Fig.i i eats the inner conductor, .a the insulating spacer, - 3 the ribbon-shaped outer conductor, which by means of appropriate guidance and rollers q. ' bent over the inner tool 5 to a tube shape and at the edges by a device 6 is overlapped or soldered, welded or folded. The inner tool 5 consists from a hollow shaft, which has one or more s; segment-wise reinforcements 7 with front Contains transverse groove 8 and is shown in Fig. Z in section with a segment. Besides is the associated one Spacer shown, the one. Corresponding Has cutout so that it can be pushed through the hollow shaft.

The transverse groove 8 is introduced with a corresponding slope; in the same presses voi outside. the roller g the pipe conductor. Inner and outer tool run over a connecting shaft io -synchronously with each other. Through a haul-off drum runs the pipeline at a speed that corresponds to the slope of the groove and the Speed of the hollow shaft, continuously deducted. This creates in the outer conductor Helical grooves. - The inner conductor can analogously in the same way hollow and flexible.

The spacers can have any yarn that fits the remaining cavity im, the hollow shaft, which is limited with regard to strength, corresponds. Fig: 3 shows e.g. B. a cut with three segments and three outer rollers as well next to it the corresponding spacer. As a result of the synchronous rotation, the rollers retain their position and segments always have the same position to one another. The distance = colder that before have been pulled or pushed close together on part of the inner conductor, are automatically pushed in at certain intervals by the device i i.

The diameter of the 'spacers is roughly equal to the diameter from groove bottom to groove bottom, d. H. approximately equal to the cylindrical diameter, which in the Lighten after the creasing remains. Against longitudinal displacement can. the spacers also on their support surfaces with recesses or thread-like (propeller-shaped) Bulges may be provided, into which the outer conductor by a device 12 is pushed in. The Fig., ¢ shows another form of the. Spacer in which Grasp approaches in the grooves of the outer conductor. The actual supporting surfaces are wound in the shape of a propeller and inclined so that the upper to the previous one Creasing pass is advanced while the lower one in the next .; just in education the conceived corridor. About pushing out of the inner tool. to enable and don't turn the spacers any more at this moment, that's it The end face of the hollow shaft is designed in the same way as a propeller.

The flexible waveguide can also be produced in such a way that a coil is wound around which a tape is placed in a tubular shape, which by external rollers, into which the turns of the helix are pressed in a ring shape. The helix can be wound alternately to the right and left, with the reversal point the spacer is finely inserted.

'' The finished cable can be covered with paint, lacquer coatings, soaked paper wraps, a plastic jacket or armouring, as is common with cables is. If the seam is folded, a seal @ can be inserted in the fold.

Claims (3)

PATENT CLAIMS: i. Process for the production of flexible high-frequency cables, at, which has a hollow shaft made of a longitudinally continuous band of the Outer and / or inner conductor bent in a tubular shape, overlapped at the edges, soldered, is welded or folded and grooved, characterized in that the grooves by rotating synchronously with the hollow shaft and one at the end of the rotatable one Hollow shaft located. Groove, which as. inner tool serves to be formed. 2. The method according to claim r, characterized in that the spacers are shaped are; that; they run through the hollow shaft or at certain intervals in the formed line are introduced. 3. The method according to claim r, characterized in that that the spacers on their. Support surfaces, recesses or thread-like approaches received, for which the outer conductor holds. q .. The method according to claim i, characterized in that that over the finished line paint, lacquer, metal or other coatings, wraps with soaked paper; Coats made of plastic or rubber are arranged-and that when the seam is folded, a seal is inserted into the fold.