초록 ▼

A method for manufacturing a hollow component made of composite materials, in particular a hot-polymerizing resin/fiber composite. The component (1) comprises enclosing walls (3) which subtend at least one cavity (2). The method uses a mold (7) which assumes the outside shape of the component (1) an

A method for manufacturing a hollow component made of composite materials, in particular a hot-polymerizing resin/fiber composite. The component (1) comprises enclosing walls (3) which subtend at least one cavity (2). The method uses a mold (7) which assumes the outside shape of the component (1) and comprises the following steps: manufacturing at least one core (11) which corresponds to the shape of the at least one cavity (2), the at least one core (11) comprising a body (12) clad by a silicone-elastomer layer (13) having a high thermal expansion coefficient .alpha. and an appropriate thickness "e"; cladding the at least one core (11) with at least one resin preimpregnated layer of fiber to form the composite (6) of the component (1), the resin having a curing temperature T.sub.1 ; arranging the at least one core and the composite (6) in the mold (7); hot-polymerizing the resin such that the at least one core (11) exerts an outward compression, generated by thermal expansion during resin polymerization, against the composite (6); and disintegrating the silicone-elastomer layer (13) during resin polymerization with the silicone-elastomer layer (13) having a disintegration temperature T which is less than the curing temperature T.sub.1 of the resin.

대표청구항 ▼

[ What is claimed is:] [1.]1. A method for manufacturing a hollow component made of a hot-polymerizing resin/fiber composite, the component (1) comprising enclosing walls (3) which subtend at least one cavity (2), the method using a mold (7) which forms the outside shape of the component (1), the me

[ What is claimed is:] [1.]1. A method for manufacturing a hollow component made of a hot-polymerizing resin/fiber composite, the component (1) comprising enclosing walls (3) which subtend at least one cavity (2), the method using a mold (7) which forms the outside shape of the component (1), the method comprising the steps of:providing at least one dual-element core (11) which corresponds to the shape of the at least one cavity (2), wherein the at least one core (11) comprises a body (12) clad by a silicone-elastomer layer (13) having a thermal expansion coefficient a higher than a thermal expansion coefficient of the body (12) and a thermal expansion coefficient of the mold (7), and a thickness "e" selected to provide a desired compression to be applied to the fiber composite;cladding the at least one core (11) with at least one resin preimpregnated layer of fiber to form the composite (6) for the component (1);arranging the at least one core and the composite (6) in the mold (7);hot-polymerizing the resin such that the at least one core (11) exerts an outward compression, generated by thermal expansion of said silicone-elastomer layer during resin polymerization, against the composite (6), wherein said body (12) and said silicone-elastomer layer (13) expand as a solid during resin polymerization; anddisintegrating the silicone-elastomer layer (13) during resin polymerization, said silicone-elastomer layer (13) having a disintegration temperature which is less than the final resin-hardening temperature of the resin, wherein said body (12) is removed from said hollow composite after resin polymerization.