Wrapping the Neck-Thru
This installment concludes the Neck-thru construction series. As a final step, the neck is wrapped in 4 layers of carbon fiber to ensure maximum rigidity. We vacuum bag the whole thing to ensure that there are no air-pockets and bubbles and to make the carbon fiber layup hug the shape as tightly as possible while allowing the resin to cure.
Vacuum bagging is a method that uses atmospheric pressure to hold laminated components (laminating epoxy and carbon fiber) in place until the adhesive cures. Laminated components are sealed in an airtight bag. Atmospheric pressure exerts around 101 kPa (14.7 PSI) inside and outside the bag. A vacuum pump then evacuates air from the inside the bag reducing the pressure inside the bag. This negative pressure creates as much as 82 kPa (12 PSI) pressure differential that compacts the laminate resulting in excellent consolidation and interlaminar bonds. The vacuum also draws out trapped air (air-pockets and bubbles).
Vacuum bagging is a crucial step. I’ll provide some links below detailing the process.
Perfection! The Final Result
(Click to zoom)