Multi-color strip double-color insulated cable core and its manufacturing mold and manufacturing method

Abstract

The invention discloses a multi-colored-bar bicolor insulating cable core and a manufacturing mold and method thereof. A multi-colored-bar bicolor insulating single layer completely fused into a whole wraps the outer side of a conductor of the multi-colored-bar bicolor insulating cable core in an extrusion mode and is provided with a strip-shaped colored bar insulating part and a strip-shaped natural color insulating part. The mold comprises a mold core, a mold sleeve and a mold sleeve clamping piece. The mold core is sleeved with the mold sleeve to form a circular-cone-sleeve-shaped forming gap. An inward concave coloring raw material feed port is formed in a contour face of the mold sleeve. A plurality of small arc-shaped injection openings are formed in the outer circumferential line, intersecting with the end face of the mold sleeve, of the contour face 40 of the mold sleeve. A plurality of inward concave colored bar raw material flowing grooves in the contour face are connected between the coloring raw material feed port and the small arc-shaped injection openings respectively. The small arc-shaped injection openings divide a natural color raw material injection opening into a plurality of large arc-shaped injection openings. The manufacturing method includes the cable core forming process that the insulating layer wraps a conductor core in an extrusion mode through an extrusion device and the mold.

Description

technical field [0001] The invention relates to the technical field of cable manufacturing, in particular to a multi-color strip double-color insulated cable core and a manufacturing mold and a manufacturing method for a multi-color strip double-color insulated cable core. Background technique [0002] As we all know, cables usually consist of a plurality of wire cores, and the wire cores are usually composed of conductors and insulating layers wrapped around the conductors. According to relevant regulations, such as the provisions of GB 6995.4-GB 6995.5 on wire and cable identification marks, the insulation layer of the cable core should have a color identification mark. There are usually two ways of color separation of the color identification mark of the insulating layer. One color separation method is a full monochromatic structure, which requires double insulating layers, that is, a thin colored insulating layer is added to the inner insulating layer of the natural col...

AI Technical Summary

Problems solved by technology

Obviously, the disadvantages of this single-color strip and two-color color separation method are: due to the limitation of the processing technology, the width of the color line is very narrow, so that the color identification mark is not obvious; the processing technology is very complicated and the production efficiency is low

The increasingly mature conductor technology of replacing copper alloy with aluminum alloy has made significant progress in reducing the cost of cables and reducing the consumption of copper resources, but there is still a gap in the insulation technology of the core, such as being limited by existing manufacturing methods and processing equipment , the processing efficiency and processing quality of the insulating layer color identification mark are not satisfactory

At present, the insulation color separation of most aluminum alloy cables adopts the color separation method of single-color strip and double-color line, that is, the main color is black, the color strip is a very thin marking line, and the color of the marking line is red, yellow and green. , blue, its defect is: because the color code line is single, and narrower, accounts for about 25% of the circumference of the core, it is difficult to identify between the cores during cable laying and installation; due to increasing the width of the color code line (such as greater than 25% of the wire core circumference), the existing processing conditions are difficult to ensure the quality of the color code line, so the width optimization of the color code line starting from the ease of processing and ensuring the quality of the color code line requires the design of the width of the color code line to be small Some (such as less than 25% of the core circumference)

Images