Patent ID: 7999561

Claim:
A resin impregnated amount measuring method in a filament winding molding comprising: unwinding a fiber from a bobbin; impregnating the fiber with a resin using a resin impregnating unit that includes a resin bath, a rotation roller arranged with the lower part immersed in the resin in the resin bath, and a knife edge that adjusts the amount of resin adhered to a surface of the rotation roller; wherein the knife edge is arranged in a case with a slight clearance with respect to the surface of the rotation roller, where the amount of resin adhered to the surface of the rotation roller can be adjusted by changing the size of the clearance; passing the fiber through an electrostatic capacitance measuring device; measuring an electrostatic capacitance of the fiber impregnated with resin; measuring an amount of resin impregnated in the fiber based on a capacitance measurement result; and winding the fiber impregnated with resin on a mandrel.