Device for manufacturing polyimide coated optical fiber

Abstract

The invention relates to the technical field of manufacturing devices of coated optical fiber and specifically relates to a device for manufacturing polyimide coated optical fiber. The device comprises a high-temperature graphite induction furnace, an online coating curing device and an offline coating curing device, wherein the online coating curing device is arranged below the high-temperature graphite induction furnace, the online coating curing device comprises a coating unit, a resistance heating furnace, a traction device and a take-up plate; the offline coating curing device sequentially comprises a pay-off wheel, a coating unit, a high-temperature curing oven, an outer diameter detection instrument, a traction device and a take-up plate. The device provided by the invention can be used for coating, curing and detecting a polyimide coating multiple times through the online coating curing device and the offline coating curing device so as to enable the produced optical fiber to precisely control the diameter of the coating and the concentricity with a cladding of the optical fiber. Simultaneously, the process is divided into two parts, namely online and offline parts, and the production process is not limited by places and has great flexibility and convenience.

Description

Technical field [0001] The invention relates to the technical field of manufacturing equipment for coated optical fibers, in particular to a device for manufacturing polyimide coated optical fibers. Background technique [0002] With the development of optical fiber technology, the application of optical fiber has been extended to the fields of laser energy transmission and sensing technology, and the application range has also extended to various high temperature and harsh environments. Optical fiber is used as information transmission material, and its core layer and cladding layer are mainly composed of quartz, and the cladding layer is covered with a coating layer to protect the optical fiber. Ordinary optical fiber uses ultraviolet curing acrylic resin as coating, and its use temperature is -60℃-85℃. If working in an environment higher than 85°C for a long time, ordinary UV-curing coatings will undergo thermal aging, especially in the presence of O2, thermal oxidative aging...

AI Technical Summary

Problems solved by technology

If you work in an environment higher than 85°C for a long time, ordinary UV-cured coatings will undergo thermal aging, especially in the presence of O2, thermal oxygen aging will occur, which will accelerate the process of breaking the polymer chains of the coating, so that The coating makes it protect the optical fiber, it cannot prevent water molecules from invading the optical fiber, accelerates the fatigue process of the optical fiber, and expands the micro-cracks on the surface of the optical fiber, resulting in the failure of the optical fiber

The existing coating process manufacturing equipment cannot accurately control the coating size and coating concentricity

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