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.
Claims50
An insert for impeding thermal conduction between an injection nozzle and an injection cavity comprising:
- an insert nozzle side for association with a leading face of the injection nozzle;
- an insert cavity side for association with the 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 injection nozzle.
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 wherein the injection nozzle is free to travel laterally across a central flat of the insert.
An insert for being disposed between an injection nozzle and an injection cavity, the insert comprising:
- an insert nozzle side for association with the injection nozzle;
- an insert cavity side for association with the injection cavity, the insert cavity side having a recess therein for spacing a flex portion of the insert from the injection cavity, the flex portion capable of flexing under force from the injection nozzle.
An injection apparatus comprising:
- an injection nozzle;
- an injection cavity having an injection gate;
- an insert between the injection nozzle and the injection cavity, the insert having a recess on an insert cavity side thereof allowing the insert to flex under force from the injection nozzle.
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, each injection cavity having an injection gate;
- and
- at least one insert, each insert situated between one of the plurality of injection nozzles and the injection cavity associated therewith, each insert having a recess on an insert cavity side thereof allowing the insert to flex under force from the associated injection nozzle.
Dependencies are inferred from the claim text.