Abstract: An auxiliary jig used with a couple of jigs for forming a structure made of a fiber-reinforced composite by heating under a pressure. The auxiliary jig is provided between the jigs while heating the structure under a pressure to prevent the jigs from falling down and to restrain a resin contained in the fiber-reinforced composite from flowing out from an interspace between the jigs.

Abstract: A honeycomb sandwich panel is produced by (a) mounting a honeycomb core on a lower prepreg laminate skin placed on a forming die, (b) superimposing thereon an upper prepreg laminate skin to cover the honeycomb core, (c) mounting flat plate-shaped elastic jigs on a portion of the resulting assembly where the lower prepreg laminate skin and the upper prepreg laminate skin are overlapping each other, (d) superimposing flat plate-shaped press jigs on the elastic jigs, and (e) heating the assembly under pressure for adhesion forming.

Abstract: A honeycomb sandwich panel is produced by (a) mounting a honeycomb core on a lower prepreg laminate skin placed on a forming die, (b) superimposing thereon an upper prepreg laminate skin to cover the honeycomb core, (c) mounting flat plate-shaped elastic jigs on a portion of the resulting assembly where the lower prepreg laminate skin and the upper prepreg laminate skin are overlapping each other, (d) superimposing flat plate-shaped press jigs on the elastic jigs, and (e) heating the assembly under pressure for adhesion forming.

Abstract: A forming jig used for forming a fiber-reinforced composite structure from a plurality of first fiber-reinforced composite preforms la, 1b, . . . linearly arranged at given intervals and one or more second fiber-reinforced composite preforms 2a, . . . passing through gaps between adjacent two first preforms and intersecting a row of the first preforms 1a, 1b, . . . comprises a combination of (a) elastic jigs 5 engageable with the intersections of the row of the first preforms 1a, 1b, . . . and the second preforms 2a, . . . , and (b) rigid jigs 6, 6′ attachable to the first preforms 1a, 1b, . . . and the second preforms 2a, in portions of these preforms other than the intersections.

Abstract: A method for efficiently producing a stiffened hollow structure from a first skin member, a second skin member and a stiffener each made of a fiber-reinforced composite with reduced steps, the stiffened hollow structure comprising a hollow skin portion and a stiffening portion for strengthening the hollow skin portion from the inside. The method comprises the steps of: (1) disposing the first skin member and the second skin member on the stiffener, an adhesive being provided between the stiffener and each of the first skin member and the second skin member; (2) placing a band on the outer surface of the first skin member and the second skin member; and (3) setting the adhesive while tightening the band and applying a tensile force to the first skin member and the second skin member.

Abstract: A method for bonding a plurality of non-magnetic members includes the steps of (1) mating the non-magnetic members via an uncured adhesive interposed between their surfaces to be bonded; (2) applying pressure to their mated portions between a pressing magnet jig and a pressure-receiving, soft-magnetic jig; and (3) curing the adhesive while applying pressure.

Abstract: An auxiliary jig used with a couple of jigs for forming a structure made of a fiber-reinforced composite by heating under a pressure. The auxiliary jig is provided between the jigs while heating the structure under a pressure to prevent the jigs from falling down and to restrain a resin contained in the fiber-reinforced composite from flowing out from an interspace between the jigs.