Injection gate insulating and cooling apparatus
AssigneePechiney Emballage Flexible Europe
InventorsPaul L. Wright, Richard P. Nightingale
Life of this patent
Estimating the term…
Abstract
An injection apparatus comprises a recessed injection gate allowing cooling ducts to be run proximate thereto and an extended nozzle configured to extend to the recessed injection gate. The apparatus also comprises an insulating and sealing insert positioned adjacent to the injection gate locating it between the nozzle and the injection cavity during injection to thermally insulate the injection gate from the nozzle and to prevent melt material from leaking between the nozzle and the gate. The insert also accommodates variations in the nozzle sizes to assure a tight seal at each nozzle.
Claims27
An insert for a multicavity injection apparatus comprising a plurality of injection nozzles, a plurality of injection cavities, one each associated with one of the plurality of injection nozzles and an insert located between at least one of the plurality of injection nozzles and the associated injection cavity, the insert comprising:
- an insert nozzle side for association with a leading face of the at least one of the plurality of injection nozzles;
- an insert cavity side for association with the associated injection cavity;
- and
- an axial bore extending as a through bore from the insert nozzle side to the insert cavity side;
- wherein, the insert nozzle side is configured to contact only the leading face of the at least one of the plurality of injection nozzles.
An injection apparatus comprising:
- an injection nozzle;
- an injection cavity having an injection gate;
- and
- an insert between the injection nozzle and the injection cavity, the insert comprising an injection nozzle side for association with the injection nozzle and an injection cavity side for association with the injection cavity, the injection nozzle being free to travel laterally across the injection nozzle side of the insert.
Dependencies are inferred from the claim text.