Patent Type: Invention Disclosure

Application (Patent) No.: CN201610917353.7

The present invention relates to a coating method for toughening fine rods of composite materials, which belongs to the field of surface modification technology for composite materials. The coating method includes the following steps: first, fiber bundles soaked in resin are passed through small holes in the initial forming mold to form a circular cross-sectional shape; Then, pass through the coating chamber containing carbon fiber powder coating inside; Thirdly, when the thin rod passes through a vacuum cleaner that does not come into direct contact, the carbon fiber powder that is not firmly adhered to the surface will be removed; Fourth, the thin rod is preheated and gel is prepared by the preheating device and the heating device; Fifth, the thin rod is shaped through a shaping mold; Sixth, the thin rod is solidified by a heating device; Finally, the fine rod is cleaned again with a vacuum cleaner equipped with a fine bristle brush to remove the loosely bonded fiber powder on the surface of the fine rod. The coating method of the present invention can be implemented in the production process of fine rods, using fiber powder as a coating and utilizing the bonding properties of the coated composite material itself, without chemical residues or separate coating processes. The method is simple and efficient.