Carbon fiber manufacturing apparatus

Abstract

A carbon fiber manufacturing apparatus includes a feeding module, a high-temperature carbonization module, a plasma surface treatment module, a sizing module, and a receiving module. A carbon fiber precursor fiber bundle released from the feeding module is sequentially processed at a predetermined speed to perform high-temperature carbonization, plasma surface treatment, sizing, and so on. The carbon fiber precursor fiber bundle is heated to form a carbon fiber, and then the surface of the carbon fiber is coated with a resin oiling agent. Particularly, through the plasma surface treatment module, the surface of the carbon fiber is roughened and provided with functional groups, which is beneficial to enhance the interface bonding of the resin oiling agent and the carbon fiber. The structure of the carbon fiber is more stable and reliable. The cost of the carbon fiber production equipment and the working time can be reduced effectively.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a carbon fiber manufacturing apparatus, and more particularly to a carbon fiber manufacturing apparatus which can greatly improve the sizing quality of a carbon fiber and effectively reduce the cost of the carbon fiber production equipment and the working time.BACKGROUND OF THE INVENTION[0002]Carbon fibers are classified into carbon fibers or graphite fibers according to their carbon contents, which have excellent mechanical properties and electrical properties and can be widely used in various applications. A conventional carbon fiber is achieved by bundling precursor fibers, such as polyacrylonitrile fibers, to form a carbon fiber precursor fiber bundle, and then the carbon fiber precursor fiber bundle is calcined (high-temperature carbonization) to form the carbon fiber.[0003]There are various precursor fibers of carbon fibers on the market, such as rayon, poly vinyl alcohol, vinylidene chloride, polyacrylonitrile (PAN)...

AI Technical Summary

Benefits of technology

The present invention provides a carbon fiber manufacturing apparatus that can improve sizing quality and reduce production costs and working time. The apparatus integrates multiple processing modules, including high-temperature carbonization, plasma surface treatment, sizing, and receiving, to allow for a more efficient and reliable carbon fiber production. The carbon fiber precursor fiber bundle is heated and formed with a resin oiling agent, resulting in a stable and reliable carbon fiber structure with improved sizing quality. The plasma surface treatment module uses a dry-type and fast surface treatment technique to enhance the interface bonding of the resin oiling agent and carbon fiber in the sizing procedure. The apparatus can be used for carbon fiber precursor fibers without pre-oxidation treatment and can produce general carbon fibers or high modulus carbon fibers.

Problems solved by technology

On the other hand, untreated carbon fibers have insufficient adhesion to a matrix resin and have poor transverse properties such as separation strength and shear strength.

Furthermore, in the high-temperature carbonization step, the surface of the carbon fiber is excessively finely formed due to high-temperature sintering, and there are few functional groups on the surface.

As a result, the fiber and the resin oiling agent cannot be bonded fully.

However, when the surface treatment of the carbon fiber is performed by means of heat treatment, a relatively long period of time is required.

Besides, the heat treatment is always performed with a large number of fibers at a time, so it is difficult to control the processing quality.

Moreover, a change of the electrolyte may affect the processing quality.

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