Our manufacturing processes
What is pultrusion?
Pultrusion is a continuous manufacturing process resulting in a steady output of a composite profile which is cut to length at the end of the process. It is called pultrusion because the profile being produced is actually pulled through the process.
The pultrusion process has four main process steps; reinforcement alignment and resin impregnation, shaping and heating in a die; the pulling process, and finally cutting.
The process starts by pulling continuous reinforcements through a resin bath to wet out the fibers. The process is controlled to ensure full wetting out of the fiber reinforcement. Excess resin is then removed to expel any trapped air and to compact the fibers. The impregnated reinforcement is passed through preforming guides to align the reinforcement before entering the heated die. The temperature of the die is carefully controlled to ensure that the composite is fully cured.