Neck ring mechanism for glass forming machine

摘要

A neck ring arm assembly for a glass container forming machine of the individual section type comprising a horizontally extending invert shaft (32) and a vertically extending cylinder (30) with a rack (28) that engages a spur gear (28) attached to the invert shaft (32) to oscillate the invert shaft. In a first embodiment, the invert shaft (32) has an inner annular sleeve (36) keyed to it, and the inner annular sleeve (36) has a polygonal exterior, preferably a hexagonal exterior. First and second outer annular sleeves surround the inner annular sleeve (36) to be oscillatable therewith, but reciprocable with respect thereto. Each of the first and second outer annular sleeves (24) has a polygonal interior which is complementary to the polygonal exterior of the inert annular sleeve (36), and each is provided with a plurality of replaceable wear pads (46) each of which is adjustable toward a surface of the polygonal exterior of the inner annular sleeve to provide for close, low backlash engagement of the inner annular sleeve by the outer annular sleeves over a prolonged duration. A neck ring carrying arm (14), made up of a pair of neck ring arm elements each of which is secured to one of the outer annular sleeves (24), is provided to carry the neck rings (12) and container parsons as the neck ring arm assembly is moved from the blank mold (16) of an I.S. machine to the blow mold (18) side by the motion of the invert shaft (32) in a first arcuate direction, and to carry the neck rings (12) back to the blank mold (16) side after releasing the parisons to blow molds (18) at the blow side by arcuate motion in an opposed arcuate direction. In an alternative embodiment, which otherwise generally corresponds to the first embodiment, the invert shaft (32) is constructed in a single piece witha polygonal exterior, to perform the functions of the separate invert shaft and inner annular sleeve of the first embodiment.