Plastic article or earthenware shaping or treating: apparatus – Means feeding fluent stock from plural sources to common...
Patent
1991-03-18
1992-03-10
Heitbrink, Tim
Plastic article or earthenware shaping or treating: apparatus
Means feeding fluent stock from plural sources to common...
2643288, 26432815, 425549, 425567, 425568, 425570, 425572, 425573, 425588, B29C 4522
Patent
active
050946030
ABSTRACT:
Multi-cavity injection molding apparatus to coinject pressurized melt from two or more melt sources. An inner melt passage extends through the central bore of a melt distribution plate and an adjacent heated nozzle. The nozzle has a tapered nose portion which extends into an adjacent heated cavity forming insert having a gate leading to one of the cavities. An outer melt passage is separated by curved conduits on opposite faces of the melt distribution plate into four channels which are radially spaced around the central bore of the nozzle. The four channels lead to a melt funnel duct which extends in the adjacent cavity forming insert around the nose portion of the nozzle. Thus the melt from the outer melt passage is evenly distributed around the melt from the inner melt passage when they join just before entering the gate.
REFERENCES:
patent: 3894823 (1975-07-01), Hanning
patent: 4373886 (1983-02-01), Hehl
patent: 4657496 (1987-04-01), Ozeki et al.
patent: 4688622 (1987-08-01), Gellert
patent: 4717324 (1988-01-01), Schad et al.
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