Fluid sprinkling – spraying – and diffusing – Combining of separately supplied fluids – And valving means controlling flow for combining
Patent
1990-05-11
1991-10-08
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
Combining of separately supplied fluids
And valving means controlling flow for combining
239417, 425564, 2643288, B05B 712
Patent
active
050546899
ABSTRACT:
A combination plastic and gas injection nozzle assembly and method of operation in which the nozzle assembly includes a plastic resin passage, a closure member for the plastic resin passage, a gas flow passage, and a closure member for the gas flow passage all coaxial with respect to one another. Actuating cylinders are provided for moving both closure members between open and closed positions. The actuating cylinders being positioned coaxial with the other elements to eliminate off-set loading of the nozzle components. A sequential molding operation is disclosed in which a plurality of mold cavities defined by a single mold assembly are injected by one or more nozzles with plastic and a gas to form hollow spaces in the molded article. The cavities are injected with plastic one at a time to reduce the required mold clamping forces and enable independent control of plastic injection into each cavity. After partially filling each mold cavity, the nozzles are used to inject pressurized gas into the molten resin forcing the resin against the surface of the mold cavities and forming hollow spaces within the molded articles.
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Daly Neil
Hunerberg Edward C.
Hoover Universal Inc.
Kashnikow Andres
Weldon Kevin P.
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