Method for forming a composite airfoil structure

Details Method for forming a composite airfoil structure Method for forming a composite airfoil structure

1997-08-06

1999-08-17

Silbaugh, Jan. H.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

264257, B29C 4320

Patent

active

059390069

ABSTRACT:
A method and a system for forming a composite airfoil structure from a preform composite airfoil structure made from resin impregnated prepreg plies. The preform is shaped with a mold having a stationary lower mold and an upper mold. The preform is inserted in the lower mold and the upper mold is then moved towards the lower mold. The preform is compressed with the upper and lower mold, providing a contact between the upper mold, the preform, and the lower mold. Extra resin from the preform is removed through the leading edge and trailing edge. During the compression molding process, the shear stress on the plies of the preform is balanced, hence eliminating ply movement and preventing wrinkles from occurring. In addition, the length of the resin flow path is reduced, which decreases the mold force requirement, shear stresses, and thus wrinkles.

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patent: 5041182 (1991-08-01), Sekiguchi et al.
patent: 5547629 (1996-08-01), Diesen et al.

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