MANUFACTURING METHOD OF CARBON-GLASS FIBER HYBRID COMPOSITES FOR WIND TURBINE BLADE

摘要

A method for manufacturing a carbon-glass fiber hybrid composite for a wind turbine blade is provided to increase rigidity and strength by aligning carbon fibers in the center of the carbon-glass fiber hybrid composite and to decrease the density by 10%. A method for manufacturing a carbon-glass fiber hybrid composite for a wind turbine blade comprises the steps of: treating glass fiber and carbon fiber with a releasing agent by VARTM(Vacuum Assisted Resin Transfer Molding) and forming the composite by positioning the carbon fiber in a middle layer and stacking the glass fiber on upper and lower layers in the same thickness on a dried mold(S1); successively stacking a peel ply fabric cloth and a mat for improving the flow of resin, on the glass fiber forming the upper layer and covering and sealing the part of the mold except a resin injection port and a vacuum port, with a transparent nylon bagging film(S2); pressing the stacked fibers by closing up the resin injection port and reducing pressure through the vacuum port over 1 atmosphere(S3); impregnating the fiber with resin by injecting the resin into the sealed mold through vacuum pressure by opening the resin injection port, and then closing up the resin injection port to cut off the inflow of the air(S4); and hardening the resin with continuously applying vacuum pressure to the inside of the mold(S5).