ROTORE PER POMPA INCLUDENTE DUE PEZZI ASSEMBLATI MEDIANTE SALDATURA, OTTENUTI PER STAMPAGGIO AD INIEZIONE DI MATERIE TERMOPLASTICHE, E PROCEDIMENTO DI FABBRICAZIONE DI TALE ROTORE

摘要

A pump rotor for displacing fluids includes a cover and a bottom part having blades. Both the bottom part and the cover are formed by injection molding of thermoplastic materials, preferably reinforced by fillers. The bottom part and the cover are joined together by welding. The walls of the bottom part and cover are sufficiently thin to replace similar metal parts and to provide maximum benefit of the skin effect resulting from the specific surface qualities of the molded material forming the bottom part and the cover. A mold for molding the bottom part and the cover is equipped with a cap which is angularly and vertically adjustable making it possible for a balancing weight to be fitted on the molded parts. The balancing weight is also angularly adjustable and has an adjustable mass.