Systems and method for producing three-dimensional articles from flexible composite materials
The present disclosure encompasses three-dimensional articles comprising flexible composite materials and methods of manufacturing said three-dimensional articles. More particularly, the present system relates to methods for manufacturing seamless three dimensional-shaped articles usable for such finished products as airbags/inflatable structures, bags, shoes, and similar three-dimensional products. A preferred manufacturing process combines composite molding methods with specific precursor materials to form flexible fiber-reinforced continuous shaped articles.
1. A method comprising the steps of:
providing a female mold;
constructing a composite layup in the female mold by applying a first fiber-reinforced scrim layer in the female mold, applying a release liner over said first fiber-reinforced scrim layer, and applying a second fiber-reinforced scrim layer over said release liner such that the release liner is sandwiched between said first and second fiber-reinforced scrim layers in the female mold, wherein said first scrim layer extends beyond said second scrim layer so as to form peripherally extended first scrim layer material;
curing said composite layup;
cutting a hole into the cured composite layup up to the release liner;
inflating the composite layup through said hole;
applying a coating into the inflated layup through said hole;
displacing the coating by rotating the composite layup to coat the interior of the layup; and
drying or curing the displaced coating.
2. The method of claim 1 , further comprising bonding a film or a surface layer on one or on both sides of said composite layup after said curing.
3. The method of claim 1 , wherein each of the first and second fiber-reinforced scrim layers comprise two or more unidirectional tape layers, each unidirectional tape layer comprising reinforcing fibers in parallel alignment.
4. The method of claim 3 , wherein said reinforcing fibers comprise ultra-high molecular weight polyethylene (UHMWPE).
5. The method of claim 3 , wherein the first and second scrim layers further comprise an intervening film layer between each of the unidirectional tape layers thereof.
6. The method of claim 3 , wherein different orientations are provided for each respective one of the unidirectional tape layers of each of the first and second scrims relative to an adjacent one of said unidirectional tape layers of that first or second scrim.
7. The method of claim 1 , further comprising folding said peripherally extended material of said first scrim onto and over said second scrim prior to said curing.
8. The method of claim 1 , further comprising removing the cured layup from the female mold.
9. The method of claim 1 , further comprising removing the release liner through the hole.