Joseph C Valerio

US Patent:

51788861, Jan 12, 1993

Filed:

Sep 20, 1991

Appl. No.:

7/763189

Inventors:

Thomas P. Donovan - West Haven CT
Robert A. Lacko - Oxford CT
Joseph A. Valerio - Murrysville PA

Assignee:

United Technologies, Corporation - Hartford CT

International Classification:

B29C 4500

US Classification:

425190

Abstract:

A resin injection port has a tapered outer cylindrical surface, an inner resin passage which is also tapered, and one or more grooves in the outward end thereof to provide a keyway for locking the plastic in the end after cure. The port also has a flange, with a recess matable with a head of a retaining bolt through rotation such that the port is twisted into position for injection. This simultaneously compresses an O-ring which provides a tight seal between the port and the mold. The flange has cut-away portions which align with the bolt head prior to twisting into position. Additionally, the mold has at least one pin which engages a corresponding inner cam surface on the port. The inner cam surface travels over the pins as the flange is twisted to force the port to break the plastic, release and move away from the mold with a 1/4 turn. Utilizing such an injection port provides a means for quickly releasing an injection port from a mold without requiring slide hammers or other such devices.