Patent ID: 7059846

Claim:
An assembly for compression molding of articles made of plastic material, composed of a main male plug and a complementary male plug, said complementary male plug comprising: a stem; an actuation element for actuating said stem; a tubular tang having a shoulder; a spindle guided in said tubular tang; a molding head, provided at said spindle to cooperate with said main male plug; a ring provided at said spindle; a first spring, arranged on said spindle so as to bear on and to act between said ring and said tubular tang; a center bearing arranged at said ring; a second spring arranged on said spindle so as to bear on said center bearing and to act thereon and on said ring or on an end of said tubular tang that lies opposite said molding head in operative configurations comprising: an inactive configuration of the complementary male plug, during which said first spring actuates said spindle into a stable position for resting against the shoulder of said tang, while said center bearing is spaced from said end of the tang opposite said molding head, and said second spring is locked between said stem and said ring; a compression configuration, during which the first and second springs act on said tubular tang and said spindle is spaced away from said shoulder, while said ring is spaced from said center bearing; and a reduced compression configuration, during which said first spring acts on said tubular tang and said second spring is locked between said stem and said ring, while said spindle is spaced away from said shoulder and said center bearing is spaced from said end of said tang.