Process pultrudate shaping

Apart from the wet processes it is also possible to make pultruded sections from prepregs. The forming procedure is the same as that used with wet resin systems. The prepreg is drawn through a heated die which melts the resin, compresses the prepreg into the required shape and cures the resin. This is a somewhat cleaner process than that using a resin bath. 

Pultrusion Pultrusion is the continuous, automated closed-molding process that is cost effective for high volume production of constant cross sectional parts. Pultruded custom profiles include standard shapes such as channels, angles, beams, rods, bars, tubing and sheets. 

Pultrusion is an automated process for continuous production of endless composite profiles of constant cross-section. It is the only fully continuous production method for profiles which is unreservedly regarded to be suitable for mass production. Specific chaxacteristics of the process are a fully automated process causing low labor costs, little waste, and no need for auxiliary material. Pultruded profiles are mainly stock articles with cylindrical or rectangular hollow cross-sections or L-, U-, T-, or H-shapes. The application of these profiles is widespread. Typical examples are window frames, reinforcing for concrete, stairways, fences, wires, exterior covering for railroad cars and container parts [10]. 

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