System and method for supplying coating coated with fiber drawing resin

Abstract

The invention relates to a system for supplying coating coated with fiber drawing resin. The system comprises a first coating tank, a second coating tank, a recycling tank, a coating filter, an air source input pipe, an air supply pipe and a pneumatic pipeline which are respectively connected with the air source input pipe, wherein the air supply pipeline is connected with the air source input pipe; the first air supply branch pipe of the air supply pipeline is connected with the first coating tank, and the second air supply branch pipe is connected with the second coating tank; the first andsecond coating tanks are respectively connected with the coating filter through first and second supply pipes; first and second pneumatic valves are correspondingly arranged on the first and second supply pipelines respectively, and are connected with the pneumatic pipeline through the first and second pneumatic branch pipes; first and second return pipes are arranged between the recycling tank and the first and second supply pipes; and the first and second coating tanks are provided with liquid level sensors. Two coating tanks are adopted for supplying materials alternately, materials can besupplied stably and constantly. The system has the advantages of stable material supply, clean coating and the like.

Description

technical field [0001] The invention relates to a feeding system, in particular to a dual-pipeline alternate feeding system. Background technique [0002] During the drawing process of silica optical fiber, it is necessary to coat the surface of the bare fiber with a resin coating to protect and improve the parameters of the optical fiber. Usually, the optical fiber needs to be coated twice. The inner coating has a lower modulus and the outer coating has a higher modulus. [0003] In the wet-wet coating process, it is necessary to heat the inner and outer coatings to about 50°C, and then press them into the mold base respectively to evenly coat the surface of the bare optical fiber. [0004] In order to keep the paint supply uninterrupted during the coating process, some manufacturers have begun to use double-material pipelines for alternate feeding. The announcement number CN103304155B discloses a feeding device for optical fiber coating, which has two paint tanks, two Two...

AI Technical Summary

Problems solved by technology

[0005] However, there are still deficiencies in the above-mentioned feeding device. During the switching process of paint buckets, the switching action is not smooth enough, especially during the switching process, there will be flow fluctuations, which will affect the uniformity of paint coating.

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