Method of vacuum-assisted RTM

摘要

A method of vacuum-assisted RTM includes disposing a resin distribution medium on one surface of a reinforcing-fiber substrate, covering the whole with a bag material, reducing the pressure inside the bag material, and injecting a resin into the resin distribution medium to distribute the resin substantially in in-plane directions and then impregnate the resin into the reinforcing-fiber substrate in the thickness direction. The method is characterized in that the flow resistance of the resin distribution medium itself during resin distribution is changed in in-plane directions of the reinforcing-fiber substrate, in accordance with a difference in fiber weight per unit area or density between parts to be impregnated with resin of the reinforcing-fiber substrate present in a plane direction of the reinforcing-fiber substrate, or in accordance with a difference in distance from a resin impregnation initiation part to a resin impregnation completion part between parts to be impregnated with resin of the reinforcing-fiber substrate present in a plane direction of the reinforcing-fiber substrate.

主权项

1. A method of vacuum-assisted RTM for disposing a resin distribution medium on one surface of a reinforcing-fiber substrate comprising:
covering the resin distribution medium with a bag material; reducing pressure inside said bag material; injecting a resin into said resin distribution medium to distribute said resin; and impregnating said resin into said reinforcing-fiber substrate in its thickness direction such that flow resistance of said resin distribution medium during resin distribution varies along an in-plane direction of said resin distribution medium in accordance with a difference in fiber weight per unit area or density between parts to be impregnated with resin of said reinforcing-fiber substrate present in a direction along said one surface of said reinforcing-fiber substrate, wherein a portion of the resin distribution medium higher in flowability is disposed adjacent a portion of the reinforcing-fiber substrate having a higher fiber weight per unit area or density and a portion of the resin distribution medium lower in flowability is disposed adjacent a portion of the reinforcing-fiber substrate having a lower fiber weight per unit area or density.