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A method for drawing double cones of preform rods

A prefabricated rod and rod diameter technology, which is applied in the direction of manufacturing tools, glass forming, glass manufacturing equipment, etc., can solve the problems of waste of raw materials, complicated process, low efficiency, etc., achieve the effect of small stress on the cone head and improve the utilization rate

Active Publication Date: 2018-03-13
JIANGSU STERLITE TONGGUANG FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the disadvantages of complex procedures, waste of raw materials, and low efficiency of the existing preform technology, the technical problem to be solved by the present invention is to provide a method for drawing a preform into a double cone

Method used

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  • A method for drawing double cones of preform rods
  • A method for drawing double cones of preform rods
  • A method for drawing double cones of preform rods

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Embodiment Construction

[0016] In order to deepen the understanding of the present invention, the present invention will be described in further detail below. This embodiment is only used to explain the present invention and does not constitute a limitation on the protection scope of the present invention.

[0017] Since the size of the preforms are currently developing in the direction of thicker and longer, and the diameter of the preforms have basically reached 150-200mm, in order to make the preforms better heat, the heat of the tapered part is more uniform, reducing the The internal stress caused by uneven heat when pulling the cone adopts the combustion method of propane and oxygen, and the gas ratio is propane: oxygen volume ratio = 60:250.

[0018] The method for drawing a double cone of a preform of the present invention includes the following steps:

[0019] (1) figure 1 As shown, the preheating process: first clamp the preform 2 to the claws 1 at both ends, confirm the level of the preform, align...

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Abstract

The invention discloses a double tapering method for a preformed rod. The method comprises the steps: clamping the preformed rod on clamping claws at the two ends, aligning at the position needing to be tapered by using lamp caps, preheating the preformed rod, pre-burning by using one lamp cap firstly, starting the second lamp cap, continuously increasing the temperature of the preformed rod to enable the temperature to permeate gradually and starting to taper after determining that the surface layer glass of the preformed rod is in a molten state; fixing the clamping claw on the left side, moving the clamping claw on the right side, locking the clamping claws, continuously heating the maximal variable diameter position of the preformed rod by using the lamp caps, repeating the above operation again, enabling the rod diameter at the tapering position to reach 15 to 16 mm after moving for 3 to 4 times, turning off the lamp caps and moving away, putting the tapering part into a heat-insulating room, slowly cooling, cutting off the thinnest part of the tapering part by using a glass knife, moving the two sections of tapered preformed rod out of the heat-insulating room, and cooling for future use. No loss in the tapering process is guaranteed, scrap of other parameters caused by core cladding ratio change caused by tapering in the wire-drawing process is avoided, and the utilization rate of the preformed rod is effectively increased.

Description

Technical field [0001] The invention relates to a method for drawing a double cone of a preform rod. Background technique [0002] With the proposal of the "Broadband China" strategy, the current domestic optical fiber and cable market presents an unprecedented stage of rapid development. Under this development opportunity, in addition to reducing costs through expansion, for major optical fiber and cable manufacturers, how to improve the output rate of existing processes and how to optimize innovative technologies is another challenging approach. [0003] Since the size of the preforms are currently developing in a thicker and longer direction, and the diameter of the preforms has basically reached 150-200mm, such preforms need to be pre-processed before entering the drawing tower, that is, through The tapering process is used to make the preform more stable in the process of drawing and turning around. For the current tapering process of the preform, the more choice is to draw ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B37/012C03B23/11
CPCC03B23/11C03B37/01251
Inventor 孙建彬柯昌黎卡彬顾天宇
Owner JIANGSU STERLITE TONGGUANG FIBER
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