Abstract: A process for producing bodies of polymeric material having an outer shell and a core of foamed material is disclosed. The process includes the steps of: providing a mold having a pair of separable half-molds arranged facing each other; extruding a tubular thermoplastic parison between the half-molds; closing the half-molds around the parison, thereby defining a hollow space between the parison and walls of the mold; injecting into the inside of the parison a thermoplastic polymeric material admixed with a physical blowing agent, the parison expanding into contact with the walls of the mold, and conforming to the shape of the mold; and removing the article form the mold.
Type:
Grant
Filed:
November 28, 1994
Date of Patent:
March 11, 1997
Assignee:
Centro Sviluppo Settori Impiego S.r.1.
Inventors:
Antonio Addeo, Francesco Mascia, Annibale Vezzoli, Aurelio Biscotti