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Production method of profiled silex glass holding bar and apparatus

A quartz glass and production method technology, applied in glass production, glass manufacturing equipment, glass molding, etc., can solve problems such as complex production process, low load-bearing strength, and large structural stress, and achieve simple process, high load-bearing strength, and internal uniform effect

Inactive Publication Date: 2008-10-22
BEIJING KINGLASS QUARTZ
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0008] The production process is complex, and due to the obvious structural defects in the welding parts, the structural stress is large and the bearing strength is low

Method used

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  • Production method of profiled silex glass holding bar and apparatus
  • Production method of profiled silex glass holding bar and apparatus
  • Production method of profiled silex glass holding bar and apparatus

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Effect test

Embodiment Construction

[0018] The production method of special-shaped quartz glass holding rod of the present invention, its preferred embodiment is as follows figure 2 Shown:

[0019] First, the quartz glass raw material is drawn into a special-shaped rod blank, and the diameter of one end of the special-shaped rod blank is larger than the diameter of the other end to form a large and small end special-shaped rod blank;

[0020] Then, the profiled rod blank is processed into a profiled rod of the desired shape. In this way, the structural defects caused by welding blank rods with different diameters can be avoided; and the defect of low yield rate caused by using large-diameter blank rods to process special-shaped rods can be avoided.

[0021] After the special-shaped rod blank is processed into a special-shaped rod of a required shape, flame polishing is also included on the processed special-shaped rod. The purpose of the flame polishing process is to eliminate small cracks on the surface of t...

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Abstract

The invention discloses a method for producing a special quartz glass holding stick and a device thereof. The raw material of quartz glass is first pulled to be a special stick blank with different diameters at the two ends; the special stick blank is then processed to be a special stick which is then done with flame polishing and precise annealing. The lower part of a melting furnace used for pulling the special stick blank is provided with a tapered feeding port the side wall of which has an induced angle of 30 degrees to 40 degrees with a horizontal plane and the diameter of which is 85 mm to 90 mm. The winding density at the lower part of a medium-frequency induction heating coil of the melting furnace is higher than that of the upper part thereof and the melting furnace adopts (medium-frequency induction) graphite for heating. The method of the invention leaves out the steps of welding of the special stick and annealing after the welding, which results in simple technology and improved production efficiency; additionally, products produced by the method has uniform inner texture and high bearing strength but no joints.

Description

technical field [0001] The invention relates to a production technology of a quartz glass holding rod, which is a raw material for optical fiber production, in particular to a production method and equipment for a special-shaped quartz glass holding rod. Background technique [0002] With the rapid development of the optical communication industry, the optical fiber manufacturing industry also develops rapidly. The two most representative processes for optical fiber production are: the emerging VAD process and the traditional MCVD process. [0003] Quartz glass holding rod is a consumable material used in conjunction with the VAD process, and its specifications and structures are different. Among them, large-sized special-shaped rods are widely used. Due to the high softening temperature and high-temperature viscosity of quartz glass, the production of large-sized special-shaped rods is difficult and expensive. [0004] Such as figure 1 Shown, a kind of large-scale specia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B20/00C03B23/04C03B29/00C03B37/01
CPCC03B5/021C03B17/04Y02P40/57
Inventor 王友军孔敏王冬王佳佳向在奎
Owner BEIJING KINGLASS QUARTZ
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