Dual-colored cable three-layer co-extrusion device

Abstract

The invention relates to a dual-colored cable three-layer co-extrusion device. The dual-colored cable three-layer co-extrusion device comprises a co-extrusion assembly and a material supply assembly,wherein the co-extrusion assembly sequentially comprises an inner mould core, a primary runner, a primary distributing module, a secondary runner, a secondary distributing module, a tertiary runner and a tertiary distributing mould; the primary runner, the secondary runner and the tertiary runner separately communicate with the material supply assembly; the two ends of the co-extrusion assembly are provided with fixed assemblies; a joint of the tertiary runner and the co-extrusion assembly is separately provided with a primary outer shielding layer charge tube and a secondary outer shielding layer charge tube; the tertiary runner is internally divided into a mixing section and a forming section in a material flow direction in sequence by taking the primary outer shielding layer charge tubeas a support point; length, along the center axis of the tertiary distributing mould, of the forming section is 3-5 millimeters; a partition part is arranged in the mixing section for dividing the mixing section into a primary outer shielding layer mixing region and a secondary outer shielding layer mixing region. The dual-colored cable three-layer co-extrusion deice has the effect of effectivelyimproving stability of the cable outer shielding layers.

Description

Technical field [0001] The invention relates to the technical field of wire and cable production and processing, in particular to a three-layer co-extrusion device for two-color cables. Background technique [0002] At present, in the wire and cable industry, there are some special insulated cables that need to be marked on the outer surface to facilitate quick distinction during use. For example, the outer surface of the cable specially used for grounding uses a combination of yellow and green. Distinguish, that is, the yellow-green ground wire is often said. By color marking the appearance of a specific cable, or changing the ratio of different colors on the outer surface of the cable, the recognizable degree of cables for different purposes can be effectively improved. In some occasions where there are many cables and the security system is more complicated, the use of the above-mentioned different methods can greatly improve the convenience of cable installation, use and mai...

AI Technical Summary

Problems solved by technology

[0005] The solution described in the above-mentioned invention patent is the technical solution of using the same co-extrusion equipment for simultaneous technology and cooling processing to form an insulating sleeve. Compared with the most traditional technical solution of batch extrusion and cooling processing, this solution has greatly improved production. efficiency, but when the scheme described in the above invention is applied to the production process of two-color cables, it is still necessary to coat the outer shielding layer in the final process

On the one hand, this solution increases the production process and requires additional coating equipment, and the coating process often needs to wait for the cable insulation sleeve to cool down, thus prolonging the time required for the entire production process

On the other hand, the coating on the surface of the two-color cable formed after coating is prone to peeling off or fading during long-term use, which is likely to have an adverse effect on subsequent identification and is not easy to maintain the appearance of the product

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