Injection molding system for making preform with undercut

Details Injection molding system for making preform with undercut Injection molding system for making preform with undercut

1991-09-23

1993-08-03

Chiesa, Richard L.

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

Mold having movable core or movable pin

425533, 425589, 425595, 425DIG58, B29C 4544

Patent

active

052327183

ABSTRACT:
An injection molding system is used to mold a preform having an undercut. The molding system includes an injection core mold, and three injection cavity molds, which are a neck mold for defining a neck of the preform, a first cavity mold including two mold halves for defining an outer wall of the preform having the undercut, and a second cavity mold for defining a remaining outer wall of the preform. The molding system also includes a clamping unit for opening and clamping the foregoing molds and a mold half opening mechanism for opening and clamping mold halves of the first cavity mold.

REFERENCES:
patent: 3855380 (1974-12-01), Gordon et al.
patent: 3905740 (1975-09-01), Lovejoy
patent: 4570897 (1986-02-01), Von Holdt
patent: 4627810 (1986-12-01), Von Holdt
patent: 4648834 (1987-03-01), Von Holdt

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