Method for drawing dual cones on preformed rod

A technology for preforms and optical fiber preforms, which is applied to manufacturing tools, glass manufacturing equipment, etc., can solve the problems of fiber preform taper loss, operation difficulty, material waste, etc. that are not fundamentally solved, and save raw materials and simplify processes , the effect of uniform cone shape

Inactive Publication Date: 2017-08-18
JIANGSU STERLITE TONGGUANG FIBER
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has defects: when the outer diameter of the preform is large, it is very difficult to pull out the streamlined cone head. At the same time, because another rod is needed as a drawing rod to draw the cone, a part of the preform will be pulled off, resulting in material waste of
The tapering method provided by this prior art can reduce the loss of the quartz rod during the tapering process of the optical fiber preform and reduce the tapering loss of the tapered head of the optical fiber preform; but it does not fundamentally solve the problem of the tapering loss of the optical fiber preform

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for drawing dual cones on preformed rod
  • Method for drawing dual cones on preformed rod
  • Method for drawing dual cones on preformed rod

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A method for drawing an optical fiber preform bicone, comprising the following steps:

[0038] 1) Preheating process, such as figure 1 Shown: Fix the preform on the two fixtures on the operating platform to ensure that the preform is in a horizontal position; turn on the blowtorch and aim at the tapered part for pre-burning until the surface glass is in a molten state;

[0039] 2) Tapering process, such as figure 1 As shown: the process is divided into N stages of stretching: when the surface glass of the preform rod is in a molten state, move the fixture slowly so that the distance between the left and right fixtures increases to the set distance, stop the movement of the fixture, this is the first stage of stretching Stretch; point the blowtorch at the part of the preform with the largest diameter change and continue heating, move the clamp, and repeat the operation of the first stage, which is the second stage of stretching; repeat until the Nth stage of stretching ...

Embodiment 2

[0053] A method for drawing an optical fiber preform bicone, comprising the following steps:

[0054] Such as figure 1 As shown, the preheating process: First, clamp the preform rod on the claws at both ends, confirm the level of the preform rod, align the lamp head with the position where the taper needs to be drawn, and preheat the preform rod by burning propane and oxygen. The best distance between the preform rods is 50mm. When preheating, first use one lamp head to pre-burn. After 8-10 minutes, turn on the second lamp head and continue to increase the temperature of the preform rods so that the temperature can gradually penetrate. After 25-30 minutes, After confirming that the surface glass of the preform is in a molten state, taper drawing is started.

[0055] Such as figure 2 As shown, the tapering process: fix the left claw, move the right claw, lock the claw after moving 18-20mm, continue to heat the lamp head to the position where the diameter of the preform is th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a method for drawing dual cones on a preformed rod. The method is characterized by including the steps of firstly, preheating, to be specific, fixing the preformed rod by two clamps on an operating platform to ensure that the preformed rod is arranged at the horizontal plane, and turning on a blow torch to burn positions where the cones are drawn out until surface glass is in a melting state; secondly, carrying out N drawing stages, to be specific, a first drawing stage, namely, slowly moving the clamps when the surface glass of the preformed rod is in the melting state and then stopping until the distance between the left clamp and the right clamp is increased to a set distance, a second drawing stage, namely continuing heating the positions, with the maximum reducing, of the preformed rod by the blow torch, and then moving the clamps to repeat the operation of the first step, repeating the previous steps until completing drawing of the Nth stage; further, turning off the blow torch, placing the position, to be drawn, of the preformed rod, in a holding furnace, cooling slowly for a certain time, cutting off from the finest drawing position by a glass cutter, moving the two sections of preformed rod with the cones formed by drawing out of the holding furnace, and cooling the same for stand-by application.

Description

technical field [0001] The invention relates to the technical field of optical fiber preform rods, in particular to a method for drawing a preform rod into a bicone. Background technique [0002] The production process of optical fiber drawing is mainly to draw the optical fiber from the lower end after heating the optical fiber preform to a molten state through the drawing furnace. In order to effectively draw, reduce the loss of the preform rod at the beginning of wire drawing, and shorten the time for forming the preform cone, it is usually necessary to make the starting end of the preform rod into a streamlined cone before wire drawing. [0003] In the prior art, the processing method of drawing one end of the optical fiber preform into a tapered shape is to heat an optical fiber preform and a quartz rod, or use two optical fiber preforms, on a fusion lathe until the butt joint surfaces are fused together, Then, it is separated by dragging the molten bed, and one end of...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C03B37/012
CPCC03B37/01251
Inventor 孙建彬柯昌黎卡彬张荣旺顾天宇
Owner JIANGSU STERLITE TONGGUANG FIBER
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap