Patent ID: 7758801

Claim:
Process for producing plastic containers, in an extrusion blow molding process, in which plastic tubing (T) which has been extruded from an extruder head in a definable cycle is placed in the mold cavity of a blow molding tool arrangement, the inserted plastic tubing is inflated via an infeed blow mandrel by overpressure according to the mold cavity and is then removed from the mold, wherein the extruded plastic tubing (T) is inserted into a mold cavity which is composed of several blow mold cavities, at least two of the blow mold cavities being located axially under one another and being arranged mirror-symmetrically to one another and connected on their mouth regions and an individual blow mold cavity being separated from the bottom section of the adjacent blow mold cavity by a land region and having a mouth on the outer surface of the blow molding tool arrangement, there is a number of guided blow mandrels corresponding to the number of pairs of blow mold cavities located mirror symmetrically to one another, which mandrels can be moved laterally in the holes of the blow molding tool arrangement and are each inserted into the two connected blow mold cavities in the region of the mouths which border one another, in order to inflate the sections of the extruded plastic tubing (T) which have been inserted there according to the blow mold cavities, while another free blow mandrel is inserted axially into the mouth of the individual blow mold cavity in order to inflate the section of the plastic tubing located there, and the containers (B) which have been inflated according to the blow mold cavities are removed from the mold.