Grooved-surface air conduit for injection molds

An improved mold assembly for producing a container and for use with an air source, said mold assembly including at least two mold portions configurable to form a mold having an interior mold cavity in the shape of said container, one or more of said mold portions each including an interior conduit for delivering air from said air source to locations in the mold cavity for operating ejector elements in use, wherein the improvement comprises:

• a pair of mold parts each having an abutment surface, one of said abutment surfaces having defined therein an air supply groove, said pair of mold parts being disposed in an operative configuration whereat they define at least in part said one mold portion, whereat the abutment surfaces lie flush against one another and whereat said pair of mold parts are pressed together such that the groove defines at least part of the interior conduit to furnish air to said ejector elements.