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Double tapering method for preformed rod

A preformed rod and rod diameter technology, applied in manufacturing tools, glass forming, glass manufacturing equipment, etc., can solve the problems of waste of raw materials, complicated procedures, low efficiency, etc., and achieve the effect of small stress on the cone head and improved utilization.

Active Publication Date: 2017-05-24
江苏斯德雷特光纤科技有限公司
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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

Method used

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  • Double tapering method for preformed rod
  • Double tapering method for preformed rod
  • Double tapering method for preformed rod

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Embodiment Construction

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

[0017] Since the current size of the preform is developing towards a thicker and longer direction, and the diameter of the preform has basically reached 150-200mm, in order to allow the preform to be heated better, the heat of the tapered part is more uniform, reducing the The internal stress caused by uneven heat during tapering adopts the combustion method of propane and oxygen, and the gas ratio propane: oxygen volume ratio = 60:250.

[0018] A kind of method for drawing double cone of prefabricated rod of the present invention, comprises the following steps:

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

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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 preformed rod into a double taper. Background technique [0002] With the proposal of the "Broadband China" strategy, the current domestic optical fiber and cable market presents an unprecedented high-speed development stage. Under this development opportunity, in addition to reducing costs through production expansion, how to improve the output rate of existing processes and how to optimize innovative technologies is another challenging way for major optical fiber and cable manufacturers. [0003] Since the current size of the preform is developing towards a thicker and longer direction, and the diameter of the preform has basically reached 150-200mm, this type of preform needs to be pre-treated before entering the drawing tower, that is, through The tapering process is used to make the preform more stable during the process of turning around and increasing the speed of wire drawing. For the current ta...

Claims

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Application Information

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IPC IPC(8): C03B37/012C03B23/11
CPCC03B23/11C03B37/01251
Inventor 孙建彬柯昌黎卡彬顾天宇
Owner 江苏斯德雷特光纤科技有限公司
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