For pressing the piston extrusion Blow moulding (parison) to a machine that pressed and blown Glassware Factory includes: a Body having a Central axis and an outer Surface rotating around a Central Axis, the external surface includes at least a First rotation Ra and second portions Spaced Apart,Conical Angles which are not higher than 2 with respect to the Axis.

摘要

A parison mold assembly for a press-and-blow glassware forming machine includes a neck ring for molding a finish portion of a parison, a parison mold for molding a body portion of the parison, and a plunger for insertion through the neck ring into the parison mold for pressing a hot glass gob against inner surfaces of the neck ring and the parison mold. The plunger has an outer surface of revolution around a central axis, including a first portion disposed within the neck ring when the plunger is fully inserted through the neck ring into the parison mold, a second portion spaced from the first portion, and a transition third portion extending between the first and second portions.