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

A wire drawing process and volatile technology, applied in the field of optical fiber processing, can solve the problems of difficult to completely remove the gaseous volatiles of the optical fiber surface coating, the high thermal conductivity gas is expensive, and the production cost of the optical fiber is increased, so as to increase equipment investment and processing. The effect of improving the environment and improving the processing quality

Active Publication Date: 2009-10-07
SICHUAN LEFEI OPTOELECTRONICS TECH CO LTD
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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

Method used

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

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Embodiment Construction

[0018] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0019] The processing process of the optical fiber includes: the preform rod 1 is heated and softened in the drawing furnace 2 to form the optical fiber 3, the optical fiber enters the coating coating device 4 after cooling and forming, the optical fiber surface is coated with the coating, and then enters the curing device 5 for coating curing. During the process, the optical fiber surface coating produces a large amount of volatile matter. After the optical fiber is cured, it enters the solid volatile matter removal device 6 to remove the cured volatile matter of the surface coating. After the removal process, it passes through the traction wheel 7 to the take-up wheel 8 to complete the optical fiber processing process.

[0020] The device for removing coating surface volatiles of the present embodiment is as figure 2 , including a slender circular cy...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C25/10
Inventor 钱新伟王瑞春彭溢蒋小强
Owner SICHUAN LEFEI OPTOELECTRONICS TECH CO LTD
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