Patent ID: 7695662

Claim:
A method for producing a resin structure having an inner preform and an outer shell resin member arranged along a side wall of the inner preform, the method comprising: stacking a plurality of prepregs, linearly bonding prepregs located adjacent to each other in the stacking direction of the plurality of overlapping prepreg layers to each other at a predetermined interval, and unfolding the plurality of prepregs to form a honeycomb inner preform; a preliminary heat curing step of preheating to cure the inner preform to a cure depth falling within a range where a flexibility of the prepregs constituting the inner preform remains; a preliminary structure making step of arranging an outer shell resin matrix to become the outer shell resin member along the side wall of the inner preform preheated by the preliminary heating step, so as to make a preliminary structure comprising the inner preform and outer shell resin matrix; a vacuum suction heating step of heating the preliminary structure made by the preliminary heating step while vacuuming the inside of the outer shell resin matrix in the preliminary structure; and a main heat curing step of heating the preliminary structure while imparting an internal pressure thereto within a mold after the vacuum suction heating step, so as to cure the preliminary structure.