Injection nozzle and method
AssigneeHusky Injection Molding Systems Ltd.
InventorsManfred Lausenhammer, Arnold Mai, Udo Schwarzkopf, Ralph Gauss
Life of this patent
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Abstract
The injection nozzle includes a longitudinal flow channel, a plurality of angular channels extending from the longitudinal flow channel (1) in a first direction at an acute angle with respect to the longitudinal axis of the nozzle, and (2) in a second direction at an acute angle with respect to the first direction, an annular channel extending from the angular channels, and a passageway extending from the annular channel to the injection orifice, wherein the angular channels cause a swirling action in the annular channel to flush out resin from the annular channel.
Claims20
The method which comprises:
- providing an injection nozzle including a nozzle body or housing portion communicating with a source of molten resin and a tip portion, and including an injection orifice, for transferring molten resin to a mold cavity, said injection nozzle having a longitudinal axis;
- transferring molten resin from said source of molten resin to said mold cavity via at least one internal flow channel in said injection nozzle, including the steps of transferring said molten resin via
- a longitudinal flow channel of said internal flow channel,
- a plurality of angular channels of said internal flow channel each of which extending from the longitudinal flow channel (1) in a first direction at a first acute angle with respect to the longitudinal axis, and (2) in a second direction at a second acute angle with respect to the first direction,
- an annular channel of said internal flow channel extending from the angular channels, and
- a passageway of said internal flow channel extending from the annular channel;
- including the step of transferring said molten resin via said longitudinal flow channel in the nozzle housing, and continuing said transfer via a central channel in the nozzle tip which extends from the longitudinal flow channel, and causing a swirling action in the annular channel by transferring molten resin from the angular channels to the annular channel to flush out resin from the annular channel.
An injection nozzle, which comprises:
- a nozzle including a nozzle body or housing portion communicating with a source of molten resin and a tip portion, and including an injection orifice, for transferring molten resin to a mold cavity;
- wherein said nozzle has a longitudinal axis and at least one internal flow channel for transferring molten resin from said source of molten resin to said mold cavity;
- said internal flow channel including:
- a longitudinal flow channel,
- a plurality of angular channels each of which extending from the longitudinal flow channel (1) in a first direction at a first acute angle with respect to said longitudinal axis, and (2) in a second direction at a second acute angle with respect to the first direction,
- an annular channel extending from the angular channels, and
- a passageway extending from the annular channel to the injection orifice;
- wherein said longitudinal flow channel extends in the nozzle housing and continues as a central channel in the nozzle tip and said angular channels cause a swirling action in said annular channel to flush out resin from said annular channel.
Dependencies are inferred from the claim text.