Injection nozzle having a raised land portion

Details Injection nozzle having a raised land portion Injection nozzle having a raised land portion

1992-01-23

1992-11-10

Heitbrink, Tim

Plastic article or earthenware shaping or treating: apparatus

Means feeding fluent stock from plural sources to common...

264572, 425573, 425812, B29C 4516

Patent

active

051621223

ABSTRACT:
A unitary nozzle for use in a gas assisted injection molding process wherein the nozzle includes a central axial resin passageway, a land portion of the nozzle extends radially into the resin passageway proximate the downstream or discharge end of the nozzle to define a generally U-shaped resin passageway terminating in a U-shaped aperture at the nozzle tip, and a central gas passageway is provided on the central axis of the nozzle within the land portion and exiting the nozzle in a circular aperture embraced within the U-shaped resin aperture at the downstream end of the nozzle so that mixing of the resin and gas during the injection and venting processes is minimized and so that ingestion of resin into the gas passageway during the venting process is minimized.

REFERENCES:
patent: 3301935 (1967-01-01), Stoeckhert
patent: 4685881 (1987-08-01), Sasaki
patent: 4935191 (1990-06-01), Baxi

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