Which manufacturing process uses resin infusion under vacuum to impregnate fibers?

Which manufacturing process uses resin infusion under vacuum to impregnate fibers?

• A. Vacuum Infusion
• B. Hand Layup
• C. Filament Winding
• D. Compression Molding

Answer: (A)

The main idea here is saturating a dry fiber preform by pulling resin through it with a vacuum. Vacuum infusion, or vacuum-assisted resin transfer molding, places the dry fibers in a mold, covers them with a vacuum bag, and uses a resin inlet system. A vacuum is applied, and resin is drawn through the fibers via flow media, fully wetting the fibers before the part cures. This method provides controlled resin content, good wet-out, and is well suited for large or complex parts while reducing voids and emissions. Hand layup applies resin manually to the surface and does not rely on vacuum-driven infusion. Filament winding involves winding fibers around a mandrel, with resin delivery integrated into the process, not the typical vacuum infusion setup. Compression molding uses heat and pressure to cure preforms, often with prepregs, rather than infusing resin through a dry fiber preform under vacuum.

The main idea here is saturating a dry fiber preform by pulling resin through it with a vacuum. Vacuum infusion, or vacuum-assisted resin transfer molding, places the dry fibers in a mold, covers them with a vacuum bag, and uses a resin inlet system. A vacuum is applied, and resin is drawn through the fibers via flow media, fully wetting the fibers before the part cures. This method provides controlled resin content, good wet-out, and is well suited for large or complex parts while reducing voids and emissions.

Hand layup applies resin manually to the surface and does not rely on vacuum-driven infusion. Filament winding involves winding fibers around a mandrel, with resin delivery integrated into the process, not the typical vacuum infusion setup. Compression molding uses heat and pressure to cure preforms, often with prepregs, rather than infusing resin through a dry fiber preform under vacuum.