SURFACE ELECTROLYTIC TREATMENT DEVICE FOR CARBON FIBER

摘要

PURPOSE:To make tthe uniform electrolytic oxidation treatment of all carbon fibers in the stage of subjecting the surface of the carbon fibers for a carbon fiber-reinforced composite material to the electrolytic oxidation treatment by disposing anodes and cathodes into electrolytic cells at both ends of plural electrolytic cells and passing the group of the carbon fibers through the two electrolytic cells respectively, thereby constituting a series type power feed system. CONSTITUTION:The surface of the carbon fibers are subjected to the electrolytic oxidation treatment to improve the adhesiveness of a matrix material and the carbon fibers in the stage of producing the carbon fiber-refinforced composite material. The anode is disposed in the 1st cell of n-pieces of the electrolytic cells and the cathode is disposed in the final cell. Partition plates through which an electrolyte can flow freely are provided in the respective electrolytic cells. The tow of N-1 pieces of the carbon fibers is passed through the n-th cell and the (n-1)th cell. Electric current is passed in a series type in each cell by the type in which the tow in each cell is the cathode in the 1st cell, the anode in the 2nd cell and the 2nd tow in the 2nd cell is the cathode and the anode in the 3rd cell. Then the currents which flow in each piece of the tow have the same value and the thickness of the anodic oxidation treat ment layers is made uniform.