DE1866342U - WIRE WITH TWO LAYERS OF INSULATION. - Google Patents

Description

1138792-1 ZlZbZ

Pall 1243 1 96

L 32 212 / 21c Gm

L A IT D I S & GYR AG, ZUG (SWITZERLAND)

Wire with two layers of insulation

A wire with an inner and an outer insulation layer is known as a so-called baked enamel wire, in which the inner insulation layer consists of a hardenable synthetic resin varnish, which layer is produced by a dipping process and then burned in _r and the outer insulation layer consists of thermoplastic material. This baked enamel wire is often used Due to its limited insulation properties, it cannot be used as a jumper wire in electrical equipment. In addition, it is relatively stiff, so that cracks can easily develop in the insulation layers at its bending points.

Dr, AK / ms / 19.7 * 61 * / ♦

<f "2 r»

away in order to get bare switching points on it, so that its use as a jumper wire leads to time losses. Next is a wire which has two insulating layers made of different plastics is known, in which the inner insulating layer Plastic which forms relatively good insulation properties, however, has a low mechanical resistance Has. The outer insulation layer mainly forms a protective layer against mechanical influences such as abrasion etc. and is less insulating. Although this wire is used for switching purposes, when making wiring harnesses it is necessary to to hold the wires forming the wiring harness together, as is common practice, by means of cord or adhesive tape.

The invention now relates to a wire with two layers of insulation, which makes it possible to manufacture cable harnesses etc. without having to tie the wires together, as was previously the case. According to the invention, this aim is achieved in that both insulation layers of the wire are made of a thermoplastic Made of plastic, with the thermoplastic plastic of the outer insulation layer, e.g. made of polyethylene consists, compared to that of the inner insulation layer, which consists e.g. of polyvinyl chloride, a lower melting temperature having.

The invention is based on the drawing, in which an exemplary embodiment of the subject matter of the invention is shown in more detail

Dr. AK / ms / 19.7.61 * A

explained.

In the drawing, 1 is a copper wire, on which the inner insulation layer 2 is a thermoplastic material, e.g., polyvinyl chloride, is sprayed on, This inner insulation layer 2 has a coating 3, which is also made of a thermoplastic Plastic, ζ, Β. There is polyethylene, which, however compared to the thermoplastic of the inner insulation layer 1 has a lower melting temperature »The coating 3 forms the outer insulation layer of the wire 1 and has a significantly smaller layer in relation to the inner insulation layer 2 Wall thickness on than this, preferably the thermol & asüaehe The plastic of the cover 3 is transparent, so that the color of the inner insulation layer 2 is visible.

To produce a wiring harness, several wires 1 are required accordingly placed against each other and heated in this position to the softening or melting temperature of their coating 3, thereby softening the coatings 3 of the wires 1 lying against one another in such a way that they fuse with one another. Solidify on subsequent cooling it again and the individual wires 1 lying against one another are firmly connected to one another by their coatings 3. To this Way, even complicated wiring harnesses can be comparatively in a short time. These also have the advantage that they look very clean. The one described But wire can also be used for other purposes, e.g. for

Dr.AK / ms / 7/19/61 7.

Manufacture of flangeless coils etc ,, d, h, especially then, if special measures are required to hold jumper wires that run next to one another,

The particular advantage of the wire described is that it on the one hand, as any common jumper wire can be used, and on the other hand, by simply heating several adjacent wires Wires these can be held together, for which previously usually additional means, such as cords or adhesive tapes etc. were required.

Dr. AK / ms / 19.7.61

Claims (2)

f "" ^ - - PA-B138792-121262 LET PROTECTION CLAIMS 1. Wire with two layers of insulation, characterized in that that "both insulation layers made of a thermoplastic material exist, the thermoplastic plastic of the outer insulation layer (5) compared to that of the inner insulation layer (2) has a lower melting temperature. 2. Wire according to claim 1, characterized in that the wall thickness the outer insulation layer (3) is less than that of the inner insulation layer (2), 3 »wire according to claim 1, characterized in that the outer Insulation layer (3) is transparent 4, wire according to claim 1 in the application in cable harnesses, characterized characterized in that the wires of the same are held together by the fused outer insulation layers (3) are" ΛΛ / VWWVV DrvAK / ms / i 9VT / 6i ^;