Apparatus for molding open containers

Claim 1

A two-part for the injection molding of open top containers of plastic material, comprising means forming a deep female cavity in one mold part, means forming an elongated male core on the other mold part cooperating with the female cavity for the molding of the open top containers, means separating the mold parts to remove the male core from the article, means on one of the mold parts temporarily holding the container seated in the female cavity during the initial portion of the mold part separation, means to retract said holding means from the container at a point during the separation of the core from the cavity, thereby leaving the molded container still wholly within the female cavity, a first gas nozzle means in the female cavity forming means, said nozzle means opening into the cavity for applying a gas stream under pressure against the outside of the bottom of the molded container to tend to eject it from the mold, open end first, upon retraction of said holding means, a second gas nozzle means directing a second stream of gas toward the open top of the container in conjunction with the operation of the first-named nozzle means whereby said second gas stream tends to disrupt the first gas stream in the area of the open top of the container, thereby allowing the gas stream from the first nozzle means to fully eject the container from the mold.