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Capillary and its manufacturing method

A capillary and glass manufacturing technology, applied in the direction of manufacturing tools, glass manufacturing equipment, and other household appliances, can solve problems such as high costs

Active Publication Date: 2022-06-28
HERAEUS QUARZGLAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires high cost to precisely fabricate and clamp the glass tubes so that the tubes fuse together homogeneously and the capillary pores are uniform

Method used

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  • Capillary and its manufacturing method
  • Capillary and its manufacturing method
  • Capillary and its manufacturing method

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Embodiment Construction

[0090] Capillary fibers are typically made using so-called "ratio drawing". This means that the geometric ratio of outer diameter to inner diameter has been predefined in the semi-finished product (preform), which corresponds to the desired ratio in capillary fibers drawn from the semi-finished product by heating. For conventional inner diameters of capillary fibers, this ratio may have been generated in the preform with sufficient accuracy for capillary fiber drawing. However, there are strict requirements on the necessary manufacturing tolerances of the preforms for the geometrical values ​​that will achieve very small inner diameters of less than about 2 μm in the capillary fibers.

[0091] In the method according to the invention, the fiber drawing process is not a ratio drawing, and therefore it is not the ratio of the corresponding radii of the core and cladding of the preform and the capillary, which are considered when designing the preform, but the ratio of the CSA zo...

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Abstract

The present application relates to a capillary and a manufacturing method thereof. A known method of manufacturing a capillary from glass comprises the following method steps: heating a capillary having an outer diameter D in a heating zone OD , inner diameter D ID and diameter ratio D rel ——where D rel =D OD / D ID - Tubular preform to stretching temperature T draw and soften it locally, and at a stretching velocity v draw Continuously drawn from the softening zone with outer diameter d OD , inner diameter d ID and diameter ratio d rel ——where d rel = d OD / d ID - a capillary strip, and cut the capillary to length from the capillary strip.

Description

technical field [0001] The present invention relates to a method for producing capillaries from glass, comprising the following method steps: heating in a heating zone having an outer diameter D OD , inner diameter D ID and diameter ratio D rel - where D rel =D OD / D ID - the tubular preform to the stretching temperature T draw and soften it locally, and at a stretching speed v draw Continuously pulled out from the softening zone has an outer diameter d OD , inner diameter d ID and the diameter ratio d rel - where d rel =d OD / d ID - the capillary strip, and cut the capillary from the capillary strip to length. [0002] Furthermore, the invention relates to a capillary made of glass, which has an outer diameter d OD and inner diameter d ID . [0003] Such capillaries are characterized by a small inner diameter of, for example, less than 5 μm. Background technique [0004] The production of capillaries is carried out, for example, by drawing capillary strands ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B23/047
CPCC03B23/047C03B23/0476G02B6/03611C03B37/01242C03B37/02781C03B2203/16C03B23/057C03B23/043C03B23/08C03B37/15C03B2203/32C03B2205/16C03B2205/30
Inventor S·魏德利希C·施米特J·沃纳
Owner HERAEUS QUARZGLAS