DE102021211354A1 - Foil-wire assembly and a method for its manufacture - Google Patents

Abstract

The invention relates to a foil-wire arrangement (1), comprising a foil (2) made of a plastic, in which at least one wire (3) is embedded, the at least one wire (3) being a wound wire (3) in the film (2) is embedded. The invention also relates to a method for producing a foil/wire arrangement, with at least one wire being embedded in a foil made of a plastic, with the at least one wire being or being wound before it is embedded in the foil.

Description

The invention relates to a foil-wire arrangement and a method for its production.

DE 10 2019 106 866 A1 describes a method for producing a plastic molded part from a plastic film or sheet to be deformed with at least one heating wire arranged in the plastic molded part, which can be contacted via at least one electrical plug connection arranged on a flat side of the plastic molded part.

If the foil is heated and deformed, the wire can detach from the foil because it cannot stretch to the same extent as the foil. Furthermore, the wire can break when the foil is deformed.

The invention is based on the object of specifying an improved foil-wire arrangement and an improved method for producing a foil-wire arrangement.

The object is achieved according to the invention by a foil-wire arrangement according to claim 1 and by a method for producing a foil-wire arrangement according to claim 5.

Advantageous configurations of the invention are the subject matter of the dependent claims.

A foil/wire arrangement according to the invention comprises at least one foil made of a plastic, in which at least one wire is embedded, the at least one wire being embedded in the foil as a wound wire. In particular, the wire can be wound in the manner of a helical line.

The plastic can be in the form of a thermoplastic, for example, so that the film can be deformed under heat.

When the foil/wire arrangement is deformed, which can take place with heating, for example to about 125° C., the wound wire is partially straightened in areas with a high degree of deformation. However, the wire itself deforms much less than a straight, non-coiled wire as is known from the prior art. This reduces or prevents the risk of wire breakage.

In one embodiment, the at least one wire is wound around a fiber, in particular a plastic fiber.

In one embodiment, the at least one wire or at least one of a plurality of wires is provided with a surface coating, in particular an electrically insulating surface coating, for example a varnish.

The foil-wire arrangement described can be used, for example, as a heater, antenna or sensor, with the foil-wire arrangement being deformed and connected to an uneven structure, ie a structure with a three-dimensional structure.

According to one aspect of the present invention, a method for producing a foil-wire arrangement is specified, wherein at least one wire is embedded in at least one foil made of a plastic, wherein the at least one wire is or is wound before it is embedded in the foil.

In one embodiment it is provided that the at least one wire is or is wound around a plastic fiber.

In one embodiment it is provided that the at least one wire is or is wound without a gap between adjacent turns. If the foil/wire arrangement is deformed, the distances between adjacent turns increase while the wire itself deforms only slightly, so that the risk of breakage is low.

In one embodiment it can be provided that the at least one wire is or is provided with a surface coating.

In one embodiment of the method, the foil-wire arrangement is deformed.

The deformed foil-wire arrangement can be overmoulded with plastic in an injection molding process.

Exemplary embodiments of the invention are explained in more detail below with reference to drawings.

• 1 eine schematische Ansicht einer Folien-Draht-Anordnung, umfassend eine Folie aus einem Kunststoff, in der mindestens ein Draht eingebettet ist,
• 2 eine schematische Ansicht des mindestens einen Drahtes, der als mindestens ein gewickelter Draht ausgebildet ist,
• 3 eine schematische Detailansicht des mindestens einen Drahtes,
• 4 eine schematische Detailansicht des mindestens einen Drahtes nach einer Verformung, und
• 5 eine schematische Ansicht einer dreidimensionalen Struktur, an der die Folien-Draht-Anordnung angeordnet ist.

Show in it:

• 1 a schematic view of a foil-wire arrangement, comprising a foil made of a plastic, in which at least one wire is embedded,
• 2 a schematic view of the at least one wire, which is designed as at least one wound wire,
• 3 a schematic detailed view of the at least one wire,
• 4 a schematic detailed view of the at least one wire after deformation, and
• 5 a schematic view of a three-dimensional structure on which the foil-wire arrangement is arranged.

Corresponding parts are provided with the same reference symbols in all figures.

1 is a schematic view of a foil-wire arrangement 1, comprising a foil 2 made of a plastic, in which at least one wire 3 is embedded. 2 is a schematic view of the at least one wire 3, which is designed as at least one wound wire 3. In particular, the at least one wire 3 can be wound around a fiber 4, for example a plastic fiber. In one embodiment, the at least one wire 3 can be provided with a surface coating, for example an insulating coating.

The foil-wire arrangement 1 can be connected to a structure 5 with an uneven surface, i.e. a clear three-dimensional structure, wherein the foil-wire arrangement 1 and thus also the at least one wire 3 can be deformed in order to conform to the surface of the Structure 5 to follow. Alternatively, the foil and wire assembly 1 can be deformed and the structure 5 with an uneven surface can then be injection molded onto the deformed foil and wire assembly 1 . During the deformation, the coiled wire 3 is partially straightened in areas with a high degree of deformation. In this case, however, the wire 3 itself deforms far less than a straight, non-coiled wire, as is known from the prior art. This reduces or prevents the risk of wire breakage.

The at least one wire 3 in the film 2 can be used, for example, as a current-carrying conductor, in particular as a heating element, antenna or sensor element. For example, the foil-wire arrangement 1 can be used as a heating element for a radome that can be used, for example, on a motor vehicle.

3 is a schematic detailed view of the at least one wire 3. In the embodiment shown, a plurality of wires 3 are wound together around a fiber 4, for example a plastic fiber. For example, the wires 3 may include a first guidewire L1, followed by a first filler wire F1 and a second filler wire F2, a second guidewire L2, a third filler wire F3, and a fourth filler wire F4. These wires 3 are wound side by side around the fiber 4, so that the fourth filler wire F4 is followed by a next turn of the first guide wire 1. In particular, the wires 3 or the at least one wire 3 can be wound without a gap or with a small gap between adjacent windings, so that the surface is as uniform as possible.

In other embodiments, a different number of guide wires and/or cored wires may be provided. The conducting wires L1, L2 can be electrically contacted. The cored wires F1 to F4 can be insulated and/or not electrically contacted.

4 is a schematic detailed view of the at least one wire 3 after a deformation of the foil-wire arrangement 1. The distances between adjacent turns of wire increase as a result of the deformation. However, the deformation of the wire 3 itself is small.

The at least one wire 3, in particular the conducting wires L1, L2, can be led out of the foil/wire arrangement 1 in order to be able to make electrical contact with it.

5 FIG. 12 is a schematic view of a three-dimensional structure 5 on which the foil-wire arrangement 1 is arranged.

reference list

1

Foil Wire Assembly

2

foil

3

wire

4

fiber, plastic fiber

5

structure

L1, L2

guide wire

F1 to F4

cored wire

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• DE 102019106866 A1 [0002]

Claims (10)

Foil-wire arrangement (1), comprising a foil (2) made of a plastic, in which at least one wire (3) is embedded, wherein the at least one wire (3) is embedded in the foil (2 ) is embedded. Foil-wire arrangement (1) after claim 1 , wherein the at least one wire (3) is wound around a plastic fiber (4). Foil-wire arrangement (1) after claim 1 or 2 , wherein the at least one wire (3) is provided with a surface coating. Use of the foil-wire arrangement (1) according to one of the preceding claims as a heater, antenna or sensor, the foil-wire arrangement (1) being deformed and connected to an uneven structure. Process for producing a foil/wire arrangement (1), in which at least one wire (3) is embedded in a foil (2) made of a plastic, the at least one wire (3) being or being wound before it is inserted into the foil (2) is embedded. procedure after claim 5 , wherein the at least one wire (3) is or is wound around a plastic fiber (4). procedure after claim 5 or 6 , wherein the at least one wire (3) is wound without spacing. Procedure according to one of Claims 5 until 7 , wherein the at least one wire (3) is or is provided with a surface coating. Procedure according to one of Claims 5 until 8th , wherein the foil-wire arrangement (1) is deformed. procedure after claim 9 , wherein the deformed foil-wire arrangement (1) is overmoulded with plastic in an injection molding process.

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