Filament winding

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Filament winding is a fabrication technique for creating composite material structures. The process involves winding filaments under tension over a male mould or mandrel. The most common filaments are carbon or glass fiber and are coated with synthetic resin as they are wound. Once the mandrel is completely covered to the desired thickness, the mandrel is placed in an autoclave to solidify (set) the resin. Once the resin has cured, the mandrel is removed, leaving a light-weight hollow final product.

Filament winding is well suited to robotic automation, where the tension on the filaments can be carefully controlled. Filaments that are applied with high tension results in a final product with higher rigidity and strength; lower tension results in more flexibility. The orientation of the filaments can also be carefully controlled so that successive layers are plied or oriented differently from the previous layer.

Products currently being produced using this technique range from golf clubs, pipes, power and transmission poles, pressure vessels to missile casings, and aircraft fuselages.


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