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US 9,937,647 B2Granted
Co-injection with continuous injection molding
AssigneeImflux Inc.
InventorsCoy Del Ward, Ralph Edwin Neufarth, Gene Michael Altonen, Chow-chi Huang, Charles John Berg
Life of this patent
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Abstract
A carousel-like continuous co-injection molding system includes an arrangement of upper and lower inclined feed channels. Each of the feed channels has a valve therein positioned upstream of an inlet to an associated mold cavity. The valve is controllable so that adjustments may be made in real time to achieve or maintain delivery of molten polymeric material to the mold cavity at constant pressure.
Claims7
A method of injection molding comprising:
- continuously feeding a supply of a first molten polymeric material to a first nozzle in selective communication with a plurality of mold cavities;
- continuously feeding a supply of a second molten polymeric material to a second nozzle in selective communication with the plurality of mold cavities, wherein the first nozzle is disposed at a higher elevation than a first inlet of at least one of the plurality of mold cavities, and wherein the second nozzle is disposed at an elevation equal to or higher than a second inlet of at least one of the plurality of mold cavities and at a lower elevation than the first nozzle,
- and in continuously feeding the supply of the first molten polymeric material to the first nozzle in fluid communication with the plurality of mold cavities, dividing the first molten polymeric material into a plurality of upper feed channels, each of the upper feed channels being in selective communication with one of the mold cavities, and each of the upper feed channels being inclined at an angle depending downwardly from the higher elevation of the first nozzle to the lower elevation of the first inlet of each of the mold cavities,
- and in continuously feeding the supply of the second molten polymeric material to the second nozzle in fluid communication with the plurality of mold cavities, dividing the second molten polymeric material into a plurality of lower feed channels, each of the lower feed channels being in selective communication with one of the mold cavities.
1 more element
Dependencies are inferred from the claim text.