Machine for injection blow molding

An injection blow molding machine for making hollow plastic articles comprising:

• a parison mold having top and bottom portions for injecting a parison onto each of a plurality of core rods;
• a blow mold having top and bottom portions for blowing said parisons into hollow work pieces;
• an eject station at which the articles are removed from the core rods;
• a turret on which the plurality of core rods are mounted, said turret rotating to advance the core rods from the parison mold to the blow mold, and from the blow mold to the eject station;
• a rotating crank shaft;
• means for translating the rotation of said crank shaft to a vertical reciprocating motion;
• a clamp beam connected to said translating means and actuated by rotation of said crank shaft to move between raised and lowered positions which are separated by a fixed stroke;
• and
• actuating means connected to the clamp beam for positioning said top portion of each of said parison and blow molds relative to said clamp beam, so that a distance between the top and bottom portions of each respective mold is less than said stroke while said clamp beam is in the raised position, whereby a clamping pressure is applied to each of said parison and blow molds when said clamp beam is actuated to the lowered position.

In an injection blow molding machine for making hollow plastic articles including a parison mold having top and bottom portions for injecting a parison onto each of a plurality of core rods, and a blow mold having top and bottom portions for blowing said parisons into hollow work pieces, press clamping apparatus comprising:

• a rotating crank shaft;
• means for translating the rotation of said crank shaft to a vertical reciprocating motion;
• a clamp beam connected to said translating means and actuated by rotation of said crank shaft to move between raised and lowered positions which are separated by a fixed stroke;
• and
• the top portion of each of said parison and blow molds fixed to and spaced from said clamp beam at a distance such that the distance between the top and bottom portions of each respective mold is less than said stroke while said clamp beam is in the raised position.