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US 7,244,118 B2Granted
Hot runner nozzle and manifold seal
AssigneeMold-Masters Limited
InventorGeorge Olaru
Life of this patent
Estimating the term…
Abstract
An injection molding apparatus includes combined sealing elements located between a nozzle head of an injection molding nozzle and a mold plate. The sealing elements are arranged so that they force the nozzle head toward an outlet surface of a manifold and provide a seal therebetween over a range of temperatures.
Claims32
An injection molding apparatus comprising:
- a manifold having a manifold melt channel extending therethrough to an outlet;
- a mold plate having an opening and a shoulder disposed about the opening;
- a nozzle having a nozzle head, and a nozzle melt channel extending through the nozzle;
- a first sealing element disposed between the nozzle head and the shoulder;
- and
- a second sealing element disposed between the nozzle head and the shoulder and contacting the nozzle head and the shoulder when the injection molding apparatus is in a cold condition;
- wherein the first sealing element contacts only one of the nozzle head and the shoulder when the injection molding apparatus is in the cold condition.
4 more elements
An injection molding apparatus comprising:
- a manifold having a manifold melt channel extending therethrough to an outlet;
- a mold plate having an opening and a shoulder disposed about the opening;
- a nozzle having a nozzle head, and a nozzle melt channel extending through the nozzle;
- a first sealing element disposed between the nozzle head and the shoulder;
- and
- a second sealing element disposed between the nozzle head and the shoulder;
- wherein the second sealing element is disposed entirely radially inward from the first sealing element toward a longitudinal axis of the nozzle.
4 more elements
An injection molding apparatus comprising:
- a manifold having a manifold melt channel extending therethrough to an outlet, and an outlet surface disposed about the outlet;
- a mold plate having an opening and a shoulder disposed about the opening;
- a nozzle having a nozzle head, and a nozzle melt channel extending through the nozzle, wherein the nozzle head includes an inlet surface that abuts the outlet surface;
- a first annular sealing element that is coupled to the nozzle head in a groove and disposed between the nozzle head and the shoulder;
- and
- a second annular sealing element contacting the nozzle head and the shoulder when the injection molding apparatus is in a cold condition and disposed radially inward of the first sealing element toward a longitudinal axis of the nozzle, wherein the first sealing element contacts only one of the nozzle head and the shoulder when the injection molding apparatus is in the cold condition.
3 more elements
Dependencies are inferred from the claim text.