Method for manufacturing a large-sized object of fiber reinforce

Details Method for manufacturing a large-sized object of fiber reinforce Method for manufacturing a large-sized object of fiber reinforce

1991-12-11

1994-04-19

Kuhns, Allan R.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

264102, 264257, 264258, 264314, B29C 4320

Patent

active

053043391

ABSTRACT:
A method of manufacturing a large-sized, thin-walled, elongated molding of fiber reinforced, hardenable synthetic resin where at least one layer of reinforcing fiber is laid against a form-retaining, rigid inner mold part, a flexible outer mold part is placed against the fiber layer, a liquid, hardenable synthetic resin is flowed into the mold cavity through openings in the mold parts to substantially fill the mold cavity, and a reduced pressure is induced within the mold cavity to cause the flexible outer mold part to be tightly drawn against the fiber layer and toward the inner mold part, air to be removed from within the resin, mold cavity and fiber layer and to cause the resin to flow into the fiber layer and mold cavity, whereby a high fiber-to-resin content molding is produced. The reduced pressure is maintained until the resin has sufficiently hardened as to be shape sustaining. Multi-channeled cores may be placed in the so-formed mold cavity to improve the uniformity of resin distribution.

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