JPS59112509A - Method of producing shielded wire - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a method of manufacturing a shielded electric wire.

In conventional shielded wires, as shown in Figure 1, a copper braided wire or copper tape 11 is wound around the outer circumference of a plastic-coated wire to form a shield layer, but the manufacturing process is complicated. The shielded electric wire L wire manufactured by this method is heavy, and in order to erect it, the erecting support must be strengthened, which is uneconomical. Moreover, the copper braided wire or copper tape that forms the shield layer is 11 had problems such as peeling off from the plastic coating or cracking at the curved installation part.

The method of the present invention was devised in view of the above points, and an embodiment illustrating the method will be described below. In FIG. A bathtub containing a conductive treatment liquid 3 containing fine carbon (for example, a chlorinated hydrocarbon solvent or an aromatic hydrocarbon solvent in the case of polyethylene-coated wires); 4 is a winding drum; The plastic coated wires C are continuously placed in a bathtub 2 containing a conductive treatment liquid 3.
The outer surface of the plastic-coated electric wire C is melted to a degree of 001 to 01 in the bathtub, and fine carbon is deposited on the outer surface to form the shield layer 5. In this way, the shield layer 5 is formed on the outer surface. The electric wire with the layer 5 formed thereon is automatically wound up on a winding drum 4 to manufacture a shielded electric wire. The amount of fine carbon mixed in the above conductive treatment liquid is not limited to a fixed amount, but can be increased or decreased as appropriate depending on the purpose of use of the shielded wire. For example, in a conductive treatment liquid containing 5 to 10% fine carbon, the outer diameter If you pass a polyethylene coated wire with a 5Tn top, it will be 019~
A shielded wire having a conductivity of about loo x f2/rr can be obtained. Furthermore, if a few percent of a resin similar to that of the plastic coating is dissolved in the conductive treatment liquid in advance, the adhesion of fine carbon can be further improved.

The method of the present invention is as described above, in which a plastic-coated electric wire C is continuously passed through a conductive treatment liquid 3 in which fine carbon is mixed in a melting solvent for the plastic coating of the electric wire, and a shield is applied to the outer surface of the plastic-coated electric wire C. Since layer 5 is formed,
Not only can shielded wires be easily manufactured using simple equipment, which significantly improves productivity, but shielded wires manufactured using this method are also lightweight and economical since there is no need to strengthen the erection support as in conventional methods. Furthermore, there is no fear that the shield layer 5 will peel off from the coating or cracks will occur at the curved installation part, and furthermore, by coating the plastic coating with fine carbon, it is possible to obtain a shielded wire with excellent weather resistance. There are advantages such as being able to

[Brief Description of the Drawings] Figure 1 is an explanatory diagram showing a conventional shielded wire, Figure 2 is an explanatory diagram showing the process of manufacturing a shielded wire by the method of the present invention, and Figure 3 is an explanatory diagram showing a shielded wire manufactured by the method of the present invention. It is an explanatory view showing a shield electric wire. l: Bobbin 2: Bath Tank 3: Conductive treatment liquid 4: Winding drum 5; Shield layer

Claims (1)

[Claims] A method for manufacturing a shielded electric wire, which comprises continuously passing a plastic-coated electric wire through a conductive treatment liquid containing fine carbon mixed in a meltable solvent for the plastic coating of the electric wire to form a shield layer on the outer surface of the plastic coating.