Method and apparatus for eliminating filament meta-flint in heating fibre beam by radio-frequency

Abstract

This invention relates to one instrument and its method of eliminate the arcing between monofilament by using RF to heating fiber bundle silk. It apply for the processing of preoxidation fiber or carbon fiber. The method is realized by the following procedure: (1) improve the used RF linear highlights heating device, add tow twisting device between send wire agencies and quartz tube thermal reactor. (2) add twisting processing treatment before the Silk fiber bundle enter quartz tube thermal reactor. The twisting device is combined by framework, bottom board set on the framework by using hollow shaft, at least three tension-oriented round fixed in the bottom board and driving mechanism of bottom board (9B rotation driven by Hollow shaft. The silk fiber bundle leads from wire feeding agencies.

Description

technical field [0001] The invention belongs to the improvement and perfection of the production process and production equipment for carbon fiber graphitization realized by radio frequency method. Specifically, it is a method and device for eliminating sparking between monofilaments in the radio frequency heating of fiber bundles. Background technique [0002] In the production technology of carbon fiber graphitization, it is necessary to use carbon fiber as a raw material and heat it to a high temperature above 2400°C, and then use continuous drawing force to make the carbon molecules into an ordered lattice structure, thereby completing the conversion from ordinary carbon molecules to graphitized molecules. . The radio frequency carbon fiber graphitization production process and equipment created by Chen Xinmou created a precedent in this field. Please refer to the patent application document 200410012239.7. This technology uses a radio frequency high-power generator an...

AI Technical Summary

Problems solved by technology

However, in the specific continuous production process, the carbon fiber or pre-oxidized fiber involved is often a bundle of thousands of monofilaments scattered in disorder. Under the action of high-frequency electromagnetic field, the proximity effect will inevitably appear. And lead to the repulsion between the monofilaments, forming a further scattered tow, and the silk hairs of broken monofilaments are mixed in the middle

Due to the difference in field strength distribution, the induced electromotive force of the single wire is different, which can easily cause the silk wool to overlap and spark, resulting in an increase in broken ends

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