Coated fiber-reinforced resin molding and process for producing same

Abstract

Provided are: a process for producing a fiber-reinforced resin, said process being capable of remarkably reducing, in molding a fiber-reinforced resin, the occurrence of feeding defects or faults on the surface and the surface roughness due to the temperature difference between molding temperature (curing temperature) and ordinary temperature; and a product obtained thereby. A process for producing a coated fiber-reinforced resin molding, comprising: a first molding step for subjecting a matrix resin which has been impregnated into a reinforcing fiber to curing at a temperature (T1) (DEG C), and thus forming a fiber-reinforced resin molding; and a second molding step for disposing the fiber-reinforced resin molding in a mold cavity which is configured by at least two molds and which has nearly the same shape as that of the fiber-reinforced resin molding, adjusting the internal temperature of the mold cavity to a temperature (T2) (DEG C) lower than the temperature (T1) (DEG C), pouring a liquid resin material for forming a coating layer into the mold cavity in such a way that the liquid resin covers at least a part of the fiber-reinforced resin molding, and curing the liquid resin material at the temperature (T2) (DEG C) to form a coated fiber-reinforced resin molding. A product obtained by the process.

Description

technical field [0001] This application claims priority based on Japanese Patent Application No. 2014-6939 filed on January 17, 2014, the entire disclosure of which is incorporated herein by reference. [0002] The present invention relates to a fiber-reinforced resin molded article and a method for producing the same. In particular, the present invention relates to a coated fiber-reinforced resin molded article in which a coating layer is formed on the surface, and a method for producing the same. The surface unevenness of the molded article caused by the morphology of the reinforcing fibers and the shrinkage of the resin material is greatly reduced, thereby having excellent surface quality. Background technique [0003] In recent years, fiber-reinforced plastic (Fiber Reinforced Plastic: FRP) parts, especially CFRP using carbon fibers, have been increasingly used in fields such as transportation equipment due to their light weight and excellent mechanical properties. Amon...

AI Technical Summary

Problems solved by technology

[0005] However, fiber-reinforced resin molded products obtained by these molding methods often have defects on the surface due to poor filling of the resin, or surface irregularities due to the shape of the reinforcing fibers and shrinkage of the resin, compared with metal parts that have been widely used until now. poor surface smoothness

In order to solve this problem, it is necessary to paint after repairing / grinding the surface of the fiber-reinforced resin molded product, so a large amount of work may be required

In addition, even with such processing, the smoothness of the surface may not be sufficiently expressed

In particular, fiber-reinforced resin molded products with a large surface area and fiber-reinforced resin molded products with complex shapes such as curved surfaces and vertically curved surfaces often require a lot of time for repairing / grinding

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