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US 10,773,434 B2Granted
Hot runner co-injection nozzle
AssigneeMilacron LLC
InventorPeter R. Thom
Life of this patent
Estimating the term…
Abstract
A co-injection nozzle is disclosed that includes a combining means configured to reduce shear heating and create a more even shear heating profile in core and skin material flow streams. The combining means is configured to reduce shear heating peaks and valleys in core and skin material flow streams as the streams flow between annular channels of the combining means during a mold filling process.
Claims20
A co-injection nozzle comprising:
- a combining component for balancing shear-induced heat in each of a first melt stream of moldable material and a second melt stream of moldable material that flow through the nozzle,
- the combining component having
- an inner part with a first port for receiving the first melt stream from a first melt source and a second port for receiving the second melt stream from a second melt source,
- a middle subcomponent that defines an inside annular channel between a middle sleeve and a middle shell thereof, and
- an outer subcomponent that defines an inside annular channel between an outer sleeve and an outer shell thereof,
- wherein the first melt stream is received within the inside annular channel of the middle subcomponent and flows downstream therefrom through a plurality of apertures in a sidewall of the middle shell and into a plurality of angled grooves in an outer surface of the sidewall of the middle shell, and
- wherein the second melt stream is received within the inside annular channel of the outer subcomponent and flows downstream therefrom through a plurality of apertures in a sidewall of the outer shell and into a plurality of angled grooves in an outer surface of the sidewall of the outer shell.
4 more elements
A co-injection nozzle comprising:
- a combining component for balancing shear-induced heat in each of a first melt stream of moldable material and a second melt stream of moldable material that flow through the nozzle,
- the combining component having
- a first subcomponent that defines a first inside annular channel between a first sleeve and a first shell thereof, the first shell having a plurality of apertures in a sidewall thereof and a plurality of angled grooves in an outer surface of the sidewall thereof,
- a second subcomponent that defines a second inside annular channel between a second sleeve and a second shell thereof, the second shell having a plurality of apertures in a sidewall thereof and a plurality of angled grooves in an outer surface of the sidewall thereof,
- wherein the first melt stream is received within the first inside annular channel of the first subcomponent and flows downstream therefrom through the plurality of apertures and the plurality of angled grooves of the first shell, and
- wherein the second melt stream is received within the second inside annular channel of the second subcomponent and flows downstream therefrom through the plurality of apertures and the plurality of angled grooves of the second shell.
3 more elements
Dependencies are inferred from the claim text.