DRILLING METHOD OF POROUS PLATE FOR AIRCRAFT ENGINE NACELLE SOUND ABSORBING PANEL AND ITS MANUFACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To precisely, highly speedily and easily carry out drilling with a simple device, to maintain the whole of a prepreg in a soft and adhesive state by preventing heat from being conveyed to other than the periphery of a hole at the time of drilling and to prevent closing of the hole by preventing a flow of resin of the prepreg into the drilled hole in the middle of heating and hardening. SOLUTION: This manufacturing method of an aircraft engine nacelle sound absorbing panel is to laminate the required number of unhardened fiber reinforcing resin prepreg faceplates 2 in a flat-faced state and to harden them by heating and pressurizing them by putting them in an autoclave 24 for each of form blocks after blocking these laminated unhardened fiber reinforcing resin prepreg porous faceplates 10 in a curved-face forming block 20 and adhering them and a vacuum drawing process by a bag film 22 by using a drilling method to drill a large number of the holes 9 to drill them in the prepreg around the hole while half-hardening resin in the prepreg around the hole by a blade added with a large number of the holes, a blade added with heat or a lazer on these laminated unhardened fiber reinforcing resin prepreg faceplates 2.