A full-dry loose tube excess length control device

Abstract

The invention relates to a fully-dry loose tube excess length control device. The fully-dry loose tube excess length control device comprises a machine frame, wherein a cooling water tank is arrangedon the machine frame. The fully-dry loose tube excess length control device is characterized in that a variable-diameter type main traction wheel and a variable-diameter type wire dividing wheel are correspondingly arranged above the cooling water tank, the variable-diameter type main traction wheel and the variable-diameter type wire dividing wheel are separated by a certain distance in the traction direction, the variable-diameter type main traction wheel is provided with a plurality of traction wheel bodies with different diameters, the variable-diameter type wire dividing wheel is providedwith a plurality of wire dividing wheel bodies with different diameters, and the diameters of the traction wheel bodies and the diameters of the wire dividing wheel bodies are gradually reduced fromthe starting end to the final end. According to the fully-dry loose tube excess length control device, the excess length and post shrinkage of a fully-dry loose tube can be accurately controlled, andtherefore the forming machining quality of the loose tube is improved. The excess length of the loose tube can be controlled and adjusted in real time through a distance adjusting device, so that thepost shrinkage of the fully-dry loose tube is further accurately controlled, and the excess length of the fully-dry loose tube is ensured to be stable. The device is simple and compact in structure, small in occupied space, low in equipment manufacturing cost and convenient to operate and use.

Description

technical field [0001] The invention relates to a full-dry loose tube excess length control device, which belongs to the technical field of optical cable manufacturing. Background technique [0002] The fully dry optical cable is filled with high-performance water-blocking yarn, water-blocking tape or water-blocking powder in the loose tube of the cable to solve the problem of water-blocking of the cable, and it is easy to use. The manufacturing process of the fully dry loose tube through the secondary coating equipment is as follows: the optical fiber passes through the pay-off guide wheel and the fiber collection mold, enters the corresponding polymer material sleeve through the head of the extruder, and fills the sleeve with water blocking Yarn, water-blocking tape or water-blocking powder, in order to ensure the diameter and roundness of the formed casing, stable compressed air is injected, and the high-temperature casing released from the mold is cooled and shaped by th...

AI Technical Summary

Problems solved by technology

[0003] In the existing secondary plastic coating equipment, the loose tube is wound on the main traction wheel and the splitting wheel. The length of each circle is the same, and the traction speed remains unchanged. The loose tube starts from the extrusion machine head to the casing upper disk. Always being stretched (the molecular chain is stretched) is not conducive to the crystallization of the sleeve material. After the sleeve is mounted, the PP or PBT material continues to crystallize and produce a large aftershrinkage, which causes the excess length of the optical fiber to continue to increase, resulting in a The excess length is uncontrollable, and the fully dry sleeve products produced seriously affect the transmission performance of the optical fiber, which cannot meet the process and use requirements

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