PROCEDE ET APPAREIL POUR AUGMENTER LE DURCISSEMENT D'UN DEMI-PRODUIT ENMATIERE PLASTIQUE RENFORCEE

摘要

A pultrusion machine and process wherein a composite fibre strand is pulled through successive stages of impregnation, curing, and forming. At the impregnation stage liquid thermosetting resin is mixed with hardener and the fiber strand saturated with the mixture and rough formed. During the initial curing stage a cure is started throughout the resin mixture by use of electrical wave energy. Before final curing, the saturated strand is pulled through the finish die where it is externally heated and wherein the saturated strand is given its final cross-sectional shape and external finish, and cured to completion immediately prior to final emergence at the exit end of the finish die.