Method and device for removing coating solidifying volatile material in optical fibre drawing process

Abstract

The present invention relates to a method and a device for removing coating solidifying volatile material in optical fibre drawing process. The method includes steps as follows: insulating optical fibre with surrounding environment after coating solidifying in a channel of the optical fibre drawing process, processing negative-pressure absorbing to air in the insulated region for generating gaseous current with high speed to scour and absorb to the optical fibre surface coating, then removing the solidifying volatile matter. The insulated region is a device for removing the solidifying volatile matter which includes a slightness cylinder, an upper end and a down end of the cylinder are equipped with a fibre inlet and a fibre outlet, an extract opening is set on the cylinder, the extract opening communicates with an air extract system through a connecting pipeline. The method can remove the optical fibre surface coatings solidifyin volatile matter in optical fibre drawing process efficiently, increase processing quality of the optical fibre and avoid volatile matter polluting surrounding environment and causing personal damage. The device has simple structure and reasonable design which can satisfy requirement for removing the solidifying volatile matter sufficiently.

Description

technical field [0001] The invention relates to a method for removing volatile matter produced in the coating solidification process in the fiber drawing process and a device used in the method, belonging to the technical field of optical fiber processing. Background technique [0002] During the process of drawing and forming the optical fiber, in order to protect the surface of the optical fiber, it is necessary to coat two or more layers of coating on the surface of the formed optical fiber. Commonly used coatings are organic polymers, which are liquid at room temperature. In the drawing process, after the liquid coating is coated on the surface of the optical fiber, it is necessary to convert the coating from liquid to solid in time. At present, the commonly used curing method is photocuring, that is, the coating is irradiated with ultraviolet light to cause a polymerization reaction inside it to form a cured layer. [0003] During the curing process of the coating, th...

AI Technical Summary

Problems solved by technology

In actual production, it is found that when the continuous drawing length exceeds 1500km, it is prone to fiber quality problems caused by incomplete removal of volatiles

At the same time, the high thermal conductivity gas used in the cooling tube is expensive and consumes a lot (3-5l / min), which greatly increases the production cost of the optical fiber

In addition, the condensation method is difficult to completely remove the gaseous volatiles on the surface coating of the optical fiber, and some gaseous volatiles enter the surrounding environment, causing environmental pollution and personal hazards

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