Pultrusion

An automated high-volume continuous process where glass roving is “pulled” through a heated die creating a profile shape.
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Pultrusion is a continuous and highly automated process, that is cost-effective in high volume production runs of constant cross section parts. Pultruded standard shapes include I-beams, channels, angles, beams, rods, bars, tubing, and sheets and have penetrated virtually every market. The pultrusion process relies on a caterpillar tread-like puller system which pulls fiber through a catalyzed resin bath, and into a heated metal die. As the wetted fiber passes through the die (formed in the shape of the desired profile) it is compacted and cured. The cured profile is then cut to length with automated saws that are synchronized to the line speed.