Device and method for manufacturing large-size mandrel loose body

Abstract

The invention provides a device and a method for manufacturing large-size mandrel loose body. The device comprises a servo motor, a quartz glass substrate rod, a mandrel loose body, a core blowtorch, a coating blowtorch, a tower, a guide rail, a deposition tank, a diameter measuring device and a weight detecting device, wherein the weight detecting device is installed on a rotating chuck of the servo motor, synchronously slides on the guide rail along with the servo motor, and is used for detecting the total weight of the mandrel loose body; the diameter measuring device is installed on the two sides of the deposition tank and used for measuring the diameter of the loose body in the depositing process.

Description

technical field [0001] The invention relates to the field of optical fibers, in particular to a manufacturing device and method for a large-sized core rod loose body. Background technique [0002] Optical fiber is usually obtained by using a drawing tower to soften a high-purity quartz glass preform and draw it in the same proportion at a high temperature, and then coat it on the surface. The high-purity quartz glass preform usually adopts "Two-step Processes", including various core rod manufacturing technologies (OVD technology: Outside Vapor Deposition, external vapor phase deposition method; VAD technology: Vapor Phase Axial Deposition, vapor phase axial deposition method; MCVD technology: Modified Chemical Vapor Deposition, improved chemical vapor deposition method; PCVD technology: Plasma Chemical Vapor Deposition, plasma chemical vapor deposition method) and outer cladding manufacturing technology (casing method, plasma spraying method, flame hydrolysis method, sol-g...

AI Technical Summary

Problems solved by technology

However, due to the influence of combustion flame, gas flow rate, cavity wind pressure, and the volume of the core rod loose body during the deposition process of the optical fiber preform base material, the density of the deposited loose body will fluctuate significantly. In severe cases, large density changes lead to loose body cracking during deposition or sintering, resulting in product loss; this invention develops a new type of optical fiber preform base material manufacturing device for this defect, which can be real-time during the deposition process. Monitor the density of the loose body, and adjust the production process in time when the density of the loose body has a large change trend, so as to avoid the cracking of the loose body and improve the geometric characteristics and optical parameters of the loose body, etc.

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