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You
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> Overview > Q6
> Processing costs > Filament
winding.
Filament
winding is easiest onto a cylindrical mandrel, so that this
method is used mainly for making pipes or other circular sections.
Fibre tows from spools are coated in resin on their way to the
mandrel. As the mandrel rotates the fibres are laid around it,
usually at an angle to the axis of rotation. Several layers
can be laid on top of one another at alternating angles. Initial
costs for a mandrel and its associated driving motor, together
with the feed mechanism for the tows, will be considerable.
However, repeat products require only material and operational
costs. If a good outer surface finish is required additional
processing will be required.
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