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AssigneeToray Industries, Inc.
InventorsToshihide Sekido, Kazuaki Kitaoka, Hiroshi Odani, Shigeru Nishiyama, Masahiko Shimizu
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A method of RTM molding wherein a reinforcing fiber substrate is placed in a mold, each of a first and a second resin distribution media exhibiting a resin flow resistance lower than the resistance of the reinforcing fiber substrate is placed on each surface of the reinforcing fiber substrate, and the inside of the mold is evacuated and a resin is injected into the mold to thereby impregnate the reinforcing fiber substrate with the resin injected, characterized in that the first resin distribution medium exhibits a resin flow resistance lower than that of the second resin distribution medium, and the evacuation is carried out through the second resin distribution medium while the resin is injected through the first resin distribution medium. The method can be advantageously employed for producing, in particular, FRP structure which is thick and excellent in designability, lightweight property and/or strength.
A method of RTM molding wherein a reinforcing fiber substrate is placed in a mold, resin distribution media each exhibiting a resin flow resistance lower than a resin flow resistance of said reinforcing fiber substrate are placed on both surfaces of said reinforcing fiber substrate, and after a pressure in said mold is reduced by evacuation, a resin is injected into said mold through said resin distribution media to impregnate said reinforcing fiber substrate with said resin injected, characterized in that a resin flow resistance of a first resin distribution medium placed on a first surface of said reinforcing fiber substrate is set lower than a resin flow resistance of a second resin distribution medium placed on a second surface of said reinforcing fiber substrate, and said evacuation is carried out through said second resin distribution medium while said resin is injected into said first resin distribution medium to impregnate said reinforcing fiber substrate with said resin injected.
A method of RTM molding characterized in that a reinforcing fiber substrate is placed in a mold, a resin distribution medium exhibiting a resin flow resistance lower than a resin flow resistance of said reinforcing fiber substrate is placed on a surface of said reinforcing fiber substrate opposite to said mold, a degasification medium comprising a gas permeation film and a gas permeable substrate is provided between said reinforcing fiber substrate and said mold, a resin is injected into said mold through said resin distribution medium after a pressure in said mold is reduced by evacuation, and said resin injected is impregnated into said reinforcing fiber substrate by evacuating said resin injected from a degasification space formed between said gas permeation film and said mold.
A method of RTM molding wherein a reinforcing fiber substrate is placed in a mold, a resin injection line and an evacuation line each communicating with an inside of said mold are provided, a pressure in said mold is reduced by evacuation and a resin is injected into said mold and impregnated into said reinforcing fiber substrate to form an FRP molded material, characterized in that, after said resin is impregnated into said reinforcing fiber substrate so as to achieve a fiber volume content lower than a target fiber volume content of said FRP molded material, the injection of resin is stopped, and thereafter, evacuation of resin is continued until reaching said target fiber volume content.
A method of RTM molding characterized in that a plurality of reinforcing fiber materials are laminated in a mold to form a reinforcing fiber material laminate, and a resin is impregnated into said reinforcing fiber material laminate by injecting a resin in a direction from an end surface of said reinforcing fiber material laminate along a laminate surface while reducing a pressure in said mold by evacuation.
Dependencies are inferred from the claim text.