Plunger And Parison Mold Assembly For A Narrow-Neck Press-And-Blow Wine Bottle

A parison mold assembly for a press-and-blow glassware forming machine, which 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 said neck ring into said parison mold for pressing a hot glass gob against an inner surface of said neck ring and said parison mold,
• said plunger having an outer surface of revolution around a central axis and including a first portion disposed within said neck ring when said plunger is fully inserted through the neck ring into the parison mold, a second portion spaced from said first portion, and a transition third portion extending between said first and second portions,
• said transition third portion being a conical outer surface at an angle not less than 4° to said axis.

A parison mold assembly for forming a wine bottle parison having a cork finish with a corkage control depth, which includes:

• a neck ring having an inside surface for molding a cork-type parison finish,
• a parison mold having an inside surface for molding a parison body, and
• a plunger for insertion through said neck ring into said parison mold to press a hot glass gob against inside surfaces of said neck ring and said parison mold, said plunger including:
• a body having a reference surface, a central axis perpendicular to said reference surface, and an outer surface of revolution around said axis and extending from said reference surface,
• said outer surface of revolution including a control surface extending from said reference surface, including at least a conical first surface portion adjacent to said reference surface, a conical second surface portion spaced from said first surface portion, and a conical third surface portion extending between and contiguous with said first and second surface portions,
• said third surface portion having an angle to said axis that is greater than those of said first and second surface portions,
• said control depth, measured from said reference surface, terminating in said second surface portion.