Importance

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Abstract

The present invention discloses a method of resin transfer molding which comprises superposing a bagging film on a layer of reinforcing fibers laid on a mold, airtightly bonding the periphery of the bagging film to the mold, evacuating the space between the bagging film and the mold, injecting a resin into the space between the bagging film and the mold to thereby impregnate the resin into the reinforcing fibers, and curing the resin, characterized in that resin injection passages and resin discharge passages are alternately formed outside the reinforcing fiber layer along a surface of the reinforcing fiber layer and the resin is injected into the resin injection passages to allow the resin injected to move to the resin discharge passages via the reinforcing fiber layer and thereby impregnate the resin into the reinforcing fiber layer.

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First Claim