Pultrusion with additional steps to form the length into a semicircular contour and alter the cross section at one or more locations along the length
Pultrusion is limited to straight sections of constant cross section
There is also a need for long parts with continuous fiber reinforcement that are curved rather than straight and whose cross sections may vary throughout length
Pulforming is suited to these less regular shapes
quality considerations in the processing of reinforced plastic
The major quality considerations in the processes described in this section involve internal voids and gaps between successive layers of material. Volatile gases that develop during processing must be allowed to escape from the lay up through the vacuum bag. in order to avoid porosity due to trapped gases. Micro cracks may develop during improper curing or during transportation and handling. These defects can be detected using ultrasonic scanning and other techniques