Machine for the production of hollow articles in at least one multiple mold

In a multiple neck mold machine having a pressing station in which a gob of plastic material fed to each neck mold is transformed into a parison carried by the respective neck mold, and also a finish forming station in which each parison is formed into a hollow article of larger diameter than the parison, a combination comprising an elongated carrier;

• a first neck mold mounted in a stationary position on said carrier;
• a second neck mold mounted on said carrier and movable in longitudinal direction of the latter relative to said stationary neck mold;
• means for moving said carrier along a predetermined path between said pressing station and said finish forming station;
• means cooperating with said movable neck mold for automatically increasing the center distance between said neck molds in dependence on the movement of said carrier from said pressing to said finish forming station;
• said center distance increasing means including stationary cam track means and cam follower means engaged in said cam track means and connected to said movable neck mold;
• and wherein said means for moving said carrier along said predetermined path comprises an arm connected at one end to said carrier and being turnable at the other end about a fixed axis normal to said arm so as to move said carrier along a circular path, said cam track means being located radially inwardly of said circular path and having a first portion concentric with said axis and a second portion likewise concentric with said axis but of a different radius than said first portion, and connected at opposite ends to said first portion, said center distance increasing means including an operating rod connecting said cam follower with said movable neck mold.