Shut-off nozzle
OwnerRobert F. Dray, Sr.inventor
Life of this patent
Estimating the term…
Abstract
An elongate projection or probe extends from the injection unit of an injection molding apparatus. A passage extends through the projection in fluid communication with the injection unit. A generally cylindrical receptacle is formed in a portion of the mold of the injection molding apparatus for receiving the projection in generally concentric sliding relation. The receptacle is in fluid communication with the mold cavity, wherein relative movement between the projection and the receptacle causes injection unit to be selectively in fluid communication with the mold.
Claims30
A coupling between an injection unit and a mold in an injection molding apparatus, the injection unit for injecting flowable polymer into the mold, the coupling comprising:
- an elongate projection from one of the injection unit and the mold;
- a passage extending through the projection in fluid communication with the injection unit;
- and
- a generally cylindrical receptacle formed in a portion of the mold for receiving the projection in generally concentric sliding relation, the receptacle being in fluid communication with the mold, wherein relative sliding movement of the projection between an open and a shut-off position within the receptacle causes the injection unit to be selectively in fluid communication with the mold.
A shut-off coupling between an injection unit and a mold, the shut-off coupling comprising:
- an elongate probe extending from the injection unit;
- an end piece on the probe opposite the injection unit;
- a passage extending through the probe and end piece and in fluid communication with the injection unit;
- a generally cylindrical receptacle in a portion of the mold, the receptacle dimensioned to receive the probe and seal with the end piece against fluid leakage, wherein relative movement of the end piece within the receptacle moves the coupling between an open position, in which the passage is not obstructed and the mold and injection unit are in fluid communication, and a shut-off position, in which the passage is obstructed and the mold and injection unit are not in fluid communication.
A shut-off coupling between an injection unit and a mold, the shut-off coupling comprising:
- an elongate probe extending from the injection unit, the probe terminating in a generally cylindrical end piece;
- a passage extending through the probe and in fluid communication with the injection unit, the passage terminating in the end piece;
- at least one port formed in the end piece and in fluid communication with the passage;
- a generally cylindrical receptacle in a portion of the mold, the receptacle dimensioned to receive the probe and seal with the end piece against fluid leakage, wherein relative movement between the injection unit and mold moves the end piece within the receptacle between an open position, in which the port is not obstructed and the mold and injection unit are in fluid communication, and a shut-off position, in which the port is obstructed and the mold and injection unit are not in fluid communication.
A kit for modifying an injection unit and mold of an injection molding apparatus to provide an improved coupling therebetween, the kit comprising:
- an elongate receptacle member for attachment to a portion of the mold, the elongate portion having a generally cylindrical receptacle in fluid communication with the mold;
- a probe member for attachment to a portion of the injection unit, the probe member in fluid communication with the injection unit and terminating in a generally cylindrical end piece dimensioned to be received in the receptacle;
- wherein the end piece is received in the receptacle in generally concentric sliding relation and movement of the end piece between an open and closed position within the receptacle selectively places the injection unit and mold in fluid communication.
Dependencies are inferred from the claim text.