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Method and apparatus for producing cylindric glass body

A cylindrical and glass body technology, used in the production of cylindrical glass bodies, which can solve problems such as path meshing errors, surface damage, pressure spots, etc.

Inactive Publication Date: 2008-09-03
HERAEUS QUARZGLAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, due to irregular wear of opposing rollers, path or mesh errors can occur, resulting in pressure marks and other surface damage

Method used

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  • Method and apparatus for producing cylindric glass body
  • Method and apparatus for producing cylindric glass body
  • Method and apparatus for producing cylindric glass body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0049] figure 1 It is a schematic diagram showing a drawing device for drawing a quartz glass fiber bundle 5 with a vertically extending longitudinal axis 15, the drawing device comprising an upper drawing unit 1 and a lower drawing unit 1 Unit 2. The upper pull-off unit 1 comprises two pull-off rollers 3, 4, which are arranged in opposite relation on a quartz glass beam 5 in a fixed horizontal position P1 and rotate in opposite directions 6 in said Roll on bundle. Equally, lower pull-out unit 2 comprises two pull-out rollers 7,8, and they are arranged on above-mentioned quartz glass beam 5 on a fixed horizontal position P2 with opposing relation, the distance between P1 and P2 is set as 55cm. The respective opposing withdrawal rollers 3 , 4 and 7 , 8 are pressed against the quartz glass strand 5 with a predetermined contact pressure which compensates for each other.

[0050] The pull-out rolls 3, 4; 7, 8 are rolls with an initial nominal outer diameter of 215 mm and a wid...

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Abstract

According to a known method for producing a cylindrical glass body by a vertical drawing process, a glass slug is softened in a heating zone and is drawn in the form of strand of glass by means of an extractor at a controlled drawing speed. Said extractor comprises a first extracting unit with rolling bodies that roll off on the strand of glass and that are distributed across its periphery. Said rolling bodies are composed of a reference rolling body and at least one auxiliary rolling body. The drawing speed is controlled via the speed of the reference rolling body. The aim of the invention is to reduce damages to the surface of the strand of glass caused by drawing and prevent deformation due to bends of the strand of glass. According to the invention, a value is determined for the torque of the reference rolling body depending on the weight of the drawn off strand of glass, said value being taken as a desired torque for adjusting the torque of the at least one auxiliary rolling body.

Description

technical field [0001] The invention relates to a method for producing a cylindrical glass body in a vertical drawing process and an apparatus therefor, in particular a quartz glass body, comprising a method step in which a glass blank is supplied to a heating zone where it is softened, A glass fiber strand (g1assstrand) is drawn from the softening zone at a controlled drawing speed by a draw-off device, which includes a first draw unit, the first draw The output unit has rolling bodies rolling on the glass fiber bundle and distributed on its circumference, said rolling bodies are composed of a reference rolling body and at least one auxiliary rolling body, the drawing speed is controlled by the speed of the basic rolling body. [0002] Moreover, the invention also relates to an apparatus for producing cylindrical glass bodies, in particular quartz glass bodies, in a vertical drawing process, comprising an annular heating element for heating and softening a glass blank, compri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B23/047C03B37/012C03B37/025C03B17/04C03B23/045
CPCC03B23/045C03B17/04C03B23/047C03B37/0124
Inventor T·博达恩O·冈茨
Owner HERAEUS QUARZGLAS