DE1020073B - Process for the production of flat electrical cables - Google Patents

Description

GERMAN

The invention relates to a method for the production of flat electrical cables using the extrusion process around the conductor pressed insulation material, which is different for the individual conductors Color or at least one pressed in in the warm plastic state, ζ. Β. straight stripes of different Has color.

The known ribbon cables consist of at least two electrical conductors, most of which are made of Plastic existing insulation the conductors through at least one connecting web in certain Connect the distance to one another to form a unit. The boundary surfaces of the connecting webs are thereby either at the same distance from the plane of the central axes of the conductors, or one of its delimiting surfaces is a plane tangential to the cylindrical surfaces the conductor insulation. The latter embodiment offers particular advantages in some cases.

It is known that manufacturers are required to label their products when they After the test, the approval to affix the VDE association mark known as the quality mark want to maintain their products. The marking also serves to ensure that Incidents of any kind, especially in the event of damage, may affect the manufacturer can be used. This marking has been carried out on electrical lines so far, for. B. in the Way that identification threads of a certain color were used in the insulation of the conductors. To the To be able to recognize individual cores of a cable or wire, they are insulated with different colors Material, whether through cotton wrapping., Plastic or rubber insulation material.

It is also known to make the marking of individual conductors in such a way that in the base material at least one strip of a different color than the base material, but of the same color thermoplastic material into which the insulation of the individual conductors is inserted. This is done like this that in the mouthpiece of the machine a protruding into the insulating sleeve forming an annular space Rail, a mandrel projecting into this space or a similar device is provided which displaced the thermoplastic material and at the end a colored in the license plate color thermoplastic material is fed, which then forms the groove in the insulation material that passes through the Displacement has arisen, filled with the colored insulation material, so that the conductor on all sides with is surrounded by an insulating layer of uniform thickness.

Ribbon cables with different colored cores are also already known. For the identification of manufacturing processes
of electrical ribbon cables

Applicant:

KDG Kabel und Draht GmbH,
Potzham, Post Taufkirchen via Munich

Dipl.-Ing, Aladar Kober, Munich,
has been named as the inventor

Ribbon lines have also been proposed to be embossed in the webs.

ao In the method described in detail at the beginning for the production of electrical ribbon cables According to the invention, the conductors are combined into a finished product, as long as the insulation materials are still in a warm plastic state, with the union in the spray head or at Leaving the extrusion head of the press happens and, if necessary, the one connecting the insulated conductors Web is formed from a different colored insulation material.

So it can z. B. serve the web color to identify the manufacturer for the line, so that all ribbon cables produced by a factory have at least one rib with a uniform color to have.

In the examples, the subject matter of the invention is to be explained in more detail on the basis of some exemplary embodiments will.

example 1

In the production of a two-wire ribbon cable, the mouthpiece forming the insulating cover is designed so that one half forms the insulating material of a certain color around one conductor and at the same time forms the web, while the other half presses a different-colored material around the second conductor, whereby the two strands forming the line are brought together at a point in time at which the insulating compounds are still very hot-plastic, so that the web of one conductor connects to the insulating material of the second conductor. In Fig. 1 of the drawing, such a line is shown. The conductor A is covered by an insulating material sheath 1, e.g. B. made of plastic, molded. The web 2 is made of the same material that

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for example has a blue color. The insulating material covering 3 of the conductor B consists of yellow-colored plastic. The two conductors are connected by fusing them in a warm plastic state at point 4 where the web 2 meets the insulating jacket 3.

Example 2

Three different colored insulating compounds are fed to the press head of the machine.

As FIG. 2 shows, a red insulating material 5 is pressed around the conductor C, a white insulating material 6 is pressed around the conductor D and a green insulating material is pressed around the web 7. The three strands are brought together in the spray head chamber and combined to form a two-wire ribbon cable. As a result, the two conductors are marked in such a way that mix-ups are impossible. The green color of the bridge, for example, has the task of serving as a proof of origin for a specific manufacturer. Of course, the bridge can also be made multicolored.

Example 3

A three-core ribbon cable is produced in a manner analogous to that described in Example 1. The third Head is in accordance with the invention with the Adjacent conductors connected, with a very narrow web, for example made of the same color material consisting of how the insulating jacket of the third conductor comes to lie between the two insulating jackets.

3 shows the general structure of such a line. For example, the insulation 8 of the conductor U as well as the connecting web 9 are made of yellow, the insulation 10 of the conductor V is made of black, the insulation 11 of the conductor W is made of light gray, the web 12 is made of orange-colored material,

Example 4

A four-core ribbon cable is manufactured analogously to the previous example. FIG. 4 shows the structure which practically corresponds to that of the three-core cable according to FIG. A neutral conductor with a red insulating sheath 13 is connected to the insulating jacket 11 of the conductor W by means of the web 14 of the same color.

The particular advantages of those produced according to the invention Ribbon cables can be seen in the fact that the individual cores can always be easily recognized and also Draw conclusions about different manufacturing companies. You can also use labels to produce webs provided by the method according to the invention particularly easily and quickly, without the need for an additional time-consuming operation during manufacture is.

Claims (1)

PATENT APPLICATION: Process for the production of electrical ridges with the extrusion process around the Head pressed insulation material, which is different color or at least for the individual conductors one pressed in in the warm plastic state, e.g. B. straight stripes of different Has color, characterized in that the conductors are combined into a finished product as long as the insulation materials are still in a warm plastic state, whereby the union happens in the extrusion head or when leaving the extrusion head of the press and possibly the bar connecting the insulated conductors is made of a different-colored insulation material will. Considered publications: German Patent Specifications No. 824 501, 840 864; Swiss Patent No. 273 515; French Patent Nos. 948 518, 959 946; British Patent Nos. 401 529, 550 246; U.S. Patent No. 2,521,123. 1 sheet of drawings © 70S 807/186 11.57