A NECK RING FOR FORMING A NECK PORTION OF A PREFORM AND THE MOLD STACK INCORPORATING SAME

摘要

There is provided a neck ring (300) for defining at least a portion of a neck portion of a preform, the neck ring comprises a body (302) having: mounting flange (303) and a molding face (304), the molding face (304) including a venting structure (306), the venting structure (306) having: (i) a plurality of air vent grooves (308) for collecting and venting, in use, excess air from a molding cavity as it is being filled with the molding material, and (ii) an air collector groove (310) in fluid communication with the plurality of air vent grooves (308) for providing an evacuation path for the air to be vented from the plurality of air vent grooves (308).