PROCEDIMIENTO Y APARATO PARA LA FABRICACION CONTINUA DE PLACAS REVESTIDAS DE ESPUMA DURA DE POLIURETANO.

摘要

Production in a continuous process of laminated plates with a core of polyurethane hard foam, according to which the reaction components to produce the polyurethane hard foam core are fed between two vertically spaced cover plates while the cover plates are advanced at a speed in conformity with the reaction speed of the components and while simultaneously with the advancement of said cover plates lateral strips are fed along the lateral longitudinal planes which define approximately the width of the laminated plates to be produced. At least one of the upper and lower marginal ends of said strips are folded outwardly away from the core being formed so as to leave at least one longitudinal gap between the lateral strips and the respective adjacent cover plate for permitting excessive foam material to escape therethrough.