Machine for forming rod of prefabricated optical fibre rod by induction heating

Abstract

The present invention relates to an induction heating preform-forming machine used in the PCVD and MCVD optical fiber preform production process, including machine body, one side of upper portion of said machine body is equipped with fixed main shaft box, and its another side is equipped with moved main shaft box, on the guideway between the fixed main shaft box moved main shaft box a mobile carrier table is mounted, and the lower portion of said mobile carrier table is connected with a reciprocating driving device, and a jacket-shaped induction heating furnace is set on the mobile carrier table. Said invention adopts the inductino heating furnace as main working heat source of the machine, and can raise the quality of optical fiber preform.

Description

technical field [0001] The invention relates to an induction heating rod forming machine tool used in the processing technology of PCVD and MCVD optical fiber preform rods, belonging to a kind of optical fiber preform rod processing equipment. Background technique [0002] When using PCVD (and MCVD), that is, the in-pipe vapor deposition method to process optical fiber preforms, it usually needs to go through two main processes of deposition and rod forming to complete the processing of optical fiber prefabrication. In the prior art, after the pure quartz liner is deposited and processed by the in-pipe vapor deposition method, the rod forming machine tool usually adopts the hydrogen-oxygen flame heating method when it is melted into rods. This hydrogen-oxygen flame heating method not only has a large heat loss, but also the SiO 2 The dust volatilization is high, the safety requirements of the equipment are strong, and the shrinkage speed is slow, the processing efficiency i...

AI Technical Summary

Problems solved by technology

In the prior art, after the pure quartz liner is deposited and processed by the in-pipe vapor deposition method, the rod forming machine tool usually adopts the hydrogen-oxygen flame heating method when it is melted into rods. This hydrogen-oxygen flame heating method not only has a large heat loss, but also the SiO 2 The dust volatilization is high, the safety requirements for the equipment are strong, and the shrinkage speed is slow, the processing efficiency is low, and the tube diameter is not easy to control, and there are hydrogen and oxygen interferences that affect the quality of the optical fiber preformed rod.

There are also resistance furnaces used as the heating source of the bar forming machine tool, but there is still the problem that the heating efficiency is not high enough

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