Preparing tool surfaces for composites

» Número: US10118315B1 (B1)

» Fecha Publicación: 06/11/2018

» Solicitante: AEROSPACE MATERIALS PROC LLC?[US]; SURFX TECH LLC?[US]

» Inventor: CHENG SIU F?[US]; GRIGORIEV MIKHAIL M?[US] (1)

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Techniques for producing composites outside of an autoclave that have smooth surface finishes are disclosed. The smooth composite surface, free of porosity, can be fabricated by curing the prepreg in a tool that includes a novel microstructure. In conventional composite manufacturing, some degree of porosity appears to originate from trapped gas bubbles that form during curing. The microstructure can provide a mechanism for the gas bubbles to escape from the tooling, thereby eliminating porosity and yielding a smooth surface finish on the out-of-autoclave composite. The microstructure can be applied to the tool surface using an inkjet process applying an acrylic resin curable with ultraviolet light.

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