Neck ring assembly for automatic blow molding machines

Details Neck ring assembly for automatic blow molding machines Neck ring assembly for automatic blow molding machines

1980-05-13

1981-09-22

Kellogg, Arthur D.

Glass manufacturing

With means above mold to take-out or transfer product

65232, 65235, 65323, C03B 9325

Patent

active

042907950

ABSTRACT:
A rotatable neck ring assembly for use primarily in an automatic blow molding machine includes an annular bushing and a concentrically arranged series of pivotally mounted foot members which in their closed position, cooperate with the bushing to grip the rim of a parison and hold it securely during the molding process. These pivoted foot members, which are spring biased to a closed position, are kept into firm engagement with the bushing by the upwardly moving parison mold. A first cam surface on the outer surface of the foot members cooperates with a corresponding surface on a concentrically surrounding sleeve to hold the foot members tightly against the bushing to grip the rim of the parison and hold it securely during the molding process. The cooperating cam surfaces on the foot members and the surrounding sleeve create a hoop tension in the bushing which must be overcome to pivot the foot members to open position at completion of the molding process. A second set of cooperating cam surfaces on the upper portion of the sleeve and foot members is effective during the application of hydraulic pressure to the uppermost surface of the foot members to greatly aid in overcoming the hoop tension in the bushing and move the foot members to open position.

REFERENCES:
patent: 3981673 (1976-09-01), Sokolow
patent: 4052187 (1977-10-01), Spaeth et al.

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