A kind of intermittent color strip extrusion device and extrusion process

Abstract

The invention provides an intermittent color bar extruding device and extruding technology. According to the technical main points, a mold sleeve and a mold core with a large taper and long bearing diameter are arranged in a machine case; a crack between the mold sleeve and the mold core is a sheathing compound runner; the sheathing compound runner is communicated with a sheathing compound extruder; a color bar splitter is fixed on the outer side of the mold sleeve through a gland; and a color bar runner of the color bar splitter is a snakelike curve and is communicated with a color bar extruder. The color bars can be extruded at fixed lengths and intervals; a sheath layer with intermittent color bars is formed on the surface of an optical cable to play a role in relatively well distinguishing the optical cable; the color bar runner has a rapid relief function, so that color bar extrusion can be quickly stopped; the extrusion pressure between the mold core and the mold sleeve is greater than the pressure of a color bar runner cavity; the color bar material extruded due to inertia can be blocked when color bar extrusion is stopped; the 'trailing' phenomenon is avoided; a mold is simple; and only the structures of the color bar runner and the mold core need to be redesigned, so that the processing cost is low.

Description

technical field [0001] The invention relates to the technical field of optical cable covering, in particular to a discontinuous color stripe extruding device and an extruding process. Background technique [0002] With the development of optical communication technology, the demand for optical cables is increasing, and it is more and more common for multiple optical cables to be laid in the same trench, groove or pipe. In the existing production technology, the outer sheath of the optical cable is generally black, so when multiple optical cables are laid together, it will be difficult to identify, which brings inconvenience to the installation, connection and detection of the optical cable. In order to solve this problem, most manufacturers now extrude one or more continuous color strips on the surface of the optical cable, and distinguish the optical cables by the color and number of the color strips. However, this method also has some problems. First, due to the limitatio...

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Problems solved by technology

However, this method also has some problems. First, due to the limitation of the extrusion process and the outer diameter of the optical cable, the number of colored stripes cannot be too much, and the optical cables with different numbers of colored stripes need to use different colored stripe material splitters, which increases the processing time. cost

In addition, after the color strip optical cable is placed outdoors for a period of time, the color strip is easy to fade after being exposed to sunlight for a long time, and similar colors such as yellow and white are easy to confuse, which will also bring difficulties to identification.

Therefore, the conventional method of extruding color strips can no longer meet the purpose of optical cable distinction. At present, major optical cable manufacturers are actively seeking new solutions.

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