a press for molding thermoplastic , thermosetting , polyurethane polymeric articles includes three workstations arranged side by side and including a central molding station and two lateral stations for cooling and extracting molded articles . two molds are rigidly connected to one another and controlled by a transfer pusher which alternately moves the molds from the molding station to either of the cooling and extraction stations . a first presser at the central molding station applies a closure pressure necessary for the material injection , while auxiliary presser arranged in each station applies a reduced secondary pressure to the molds at the end of the injection step , during the translatory motion of the mold and during the cooling step .