Method for fabrication of glass container e.g. wine bottle with internally threaded neck, involves providing helical guide between guide portion and plunger and transforming linear movement effected by linear actuator on plunger

摘要

The method involves feeding gob of molten glass inside chamber of mold equipped with plunger (6) having helical rib or groove (15) on outside surface. A linear actuator (30) acts on plunger, so that linear movement of plunger is effected along longitudinal axis. The plunger is moved relative to guide portion (14) along longitudinal axis. A helical guide (16,17) is coaxial to longitudinal axis and provided between guide portion and plunger and transform the linear movement effected by linear actuator on plunger into roto-translational motion of plunger. Independent claims are included for the following: (1) equipment for fabrication of glass containers with internally threaded neck; and (2) glass container producible with process and equipment.