Abstract: In a process of making a rotationally symmetrical article, such as rope pulleys, running wheels or the like, from plastic material such as cast polyamides, raw material melts of plastic material and predetermined amounts of catalysts, activators and stabilizers are prepared at different formulation and composition to impart the melts with different mechanical strengths after polymerization. The raw material melts are poured into a heated, rotating mold in succession in dependence on a polymerization pattern of the raw material melts. After complete polymerization of the melts, the mold is opened, and the finished article can be removed from the mold for optional refinishing procedure.

Abstract: A composite section for frames of windows, doors, facade elements and the like consists of two metal section parts and at least one plastic insulating web which joins these metal section parts and is held with its ends in corresponding grooves of the metal section parts. The plastic material forming the insulating web is combined with a composite fiber skeleton consisting of heat-resistant fibers. The composite fiber skeleton is anchored in a positively and/or frictionally connected manner in the grooves of the metal section parts so as to also ensure cohesion of the metal section parts when the plastic material of the insulating web degenerates. The composite fiber skeleton is at least one band with thickened edge sections which are anchored in a positively connected manner in the grooves of the metal section parts.