A double-layer electric wire processing device and a double-layer electric wire processing method

Abstract

The invention discloses a double-layer wire processing device and a double-layer wire processing method. The device comprises a wire core inlet, a finished product outlet, a first plastic spray mouth, a wire core channel, a second plastic spray mouth, and a mold. The wire core channel is fixed at a position corresponding to the wire core inlet and communicated with the wire core inlet. The first plastic spray mouth is above the wire core channel, and the wire core channel is provided with a through hole for inner plastic to flow in. The mold includes a mold core and a mold sleeve. The mold core is communicated with the wire core channel. The mold sleeve is communicated with the finished product outlet. The mold core is communicated with the mold sleeve and clamped inside the mold sleeve. The second plastic spray mouth is above the mold sleeve, and the side, facing the second plastic spray mouth, of the mold sleeve is provided with a channel for outer protective plastic to flow in. A double-layer cable produced is cleaner, and has a longer service life.

Description

technical field [0001] The invention relates to a wire extruding device, in particular to a double-layer wire processing device and a double-layer wire processing method. Background technique [0002] The existing polyvinyl chloride unsheathed cables and wires have disadvantages such as poor anti-aging performance, short service life, easy damage, and generation of a large amount of smoke and toxic and harmful gases when burned. Therefore, it is an urgent problem to seek a long-life, safe, reliable and long-term durable cable and wire. [0003] In order to solve the above problems, double-layer cables are usually used in the prior art, and in the traditional process of making double-layer cables: [0004] One is to extrude separately on two extruders with different screw diameters. This extrusion method is only suitable for the insulation and sheath to be extruded separately, and the cleanliness between the two layers is not required. The production process is shown in fig...

AI Technical Summary

Problems solved by technology

[0006] Among them, the above-mentioned first extrusion method is not only easy to cause damage to the inner layer insulation due to repeated work such as wire take-up, pay-off, upper plate, and lower plate, but also easily leads to pollution of the insulating surface, causing hidden dangers to the insulation performance. It is suitable for double-layer insulation extrusion of cables and wires with a rated voltage of 450 / 750V and below;

[0007] Moreover, although the second extrusion method prevents the damage and pollution of the insulating surface to a greater extent than the first one, there is still a distance for the inner insulation to be directly exposed to the air after extrusion. , its surface is still easy to absorb dust and other pollutants, and there are still hidden dangers in the insulation performance

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