Recognizable cable, extrusion die and manufacture method thereof

Abstract

The invention discloses a recognizable cable, an extrusion die and a manufacture method thereof. The recognizable cable is formed by extruding longitudinal color stripes with colors different from a body on the surface of a protective sleeve and / or an insulated layer so as to form an obvious identification mark on the surface of the cable and / or a cable core. The extrusion die is formed by arranging a circular shunt groove along the circumference of the die body and longitudinally arranging a pigment feeding groove which is communicated with the circular shunt groove; the die body is also longitudinally provided with an extrusion pigment groove communicated with the circular shunt groove, and an outlet is circularly provided with a pigment extrusion opening communicated with the extrusion pigment groove. The invention not only enables the color strips to be firmly clearly attached and be rapidly accurately identified and have high identification rate, but also keeps the physical mechanical performance of the protective sleeve and / or the insulated layer so as to have good economy, can directly identify various characteristics of the color strips, such as voltage stages, waterproofness, fireproofness, and the like, can add a black pigment to an insulated base pigment and overcomes the defect of carbon black addition incapability of the prior art so that a cable without a protective layer has weatherability and can be used for outdoor overhead laying.

Description

technical field [0001] The invention relates to a cable, especially an easily identifiable and distinguishable cable. In addition, the invention also relates to an extrusion die of the easily identifiable cable and a manufacturing method of the easily identifiable cable. Background technique [0002] In the wire and cable industry, the identification of sheaths and / or cores is distinguished by giving different identification marks on the surface of the cable sheath and / or each core. The identification marks in the prior art are usually divided into: (1) adding Pigments to form different colors; (2) Print numbers and letters on the surface of the sheath and / or core by means such as spraying codes and printing; (3) Use a mold to leave unevenness on the surface of the sheath and / or core Imprints such as concave-convex ridges and / or numbers; (4) placing ribbons between the conductor and the insulating layer (such as Chinese patents 03204089.X, 03203931.X) or pasting ribbons or i...

AI Technical Summary

Problems solved by technology

[0003] Method (1) Color identification, the addition of pigments will reduce the insulation and physical and mechanical properties of insulating materials, and also increase the types and quantities of insulating pigments; secondly, in the actual production process, if extrusion is required to change the color, It is necessary to stop the machine to replace the extruded insulation pigment, which will cause a large waste of insulation material, and this waste of insulation material is positively correlated with the diameter of the wire core, that is, the thicker the wire core, the more waste of insulation material, and the replacement of insulation material Occupying production time will result in a decrease in production efficiency; moreover, when used as a sheathed or unsheathed cable, it cannot be used for external application or overhead, because for external application or overhead cables, carbon black materials must be added to meet the weather resistance requirements, and adding Carbon black materials are difficult to color and cannot be identified

[0004] Method (2) digital identification, because the insulation or sheath materials are generally polar materials, the printing consumables such as ink have poor adhesion on the surface, and there will be uneven winding speed and tension during the processing process. These will cause the logo to be vague, unclear, and difficult to identify

[0005] Method (3) Concave-convex imprint identification, when the cable is extruded and heat-processed, the concavo-convex imprint of the mold will cause uneven thickness of the cable sheath or insulating layer, which will cause uneven stress, thereby reducing the physical and mechanical properties of the material

[0006] Method (4) ribbon identification can only be used in the cable core, the sheath cannot be identified, and the ribbon is placed, not only the processing process is very easy to be torn due to the traction force of the take-up and release line, but also the processing technology is relatively Complicated; the pasting ribbon will fall off due to weak bonding; the coating color strip has poor adhesion, and it is easy to cause the coating color strip to fall off during production, transportation, installation, and use. It is divided into two processes, which increases the production process and affects production efficiency. The cost of coating paint is relatively high, which will increase the cost of cables

And the aforementioned single ribbon, when the ribbon is on the back of the line of sight after the wire core is rotated, it will cause difficulty in identification, and the difficulty in identifying the core will bring difficulties to cable processing, cable joint processing and cable construction.

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