Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – To produce composite – plural part or multilayered article
Patent
1996-09-11
1998-08-25
Timm, Catherine
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
To produce composite, plural part or multilayered article
2643288, 26432814, 425127, 425130, B29C 4516, B29C 4510, B29C 4513
Patent
active
057980691
ABSTRACT:
The foregoing objects are attained by the opposed gating injection method and apparatus for forming molded articles and for use with injection molders wherein a first mold half and a second mold half are adapted to cooperate and form at least one mold cavity. A first injector nozzle is positioned in a first mold half adjacent the cavity, for injecting a first molding resin into the cavity through a first orifice. A second injector nozzle is included which is positioned in the second mold half adjacent the cavity for injecting a second molding resin. The second resin may be different from the first resin or the same as the first resin. The second resin is injected through a second orifice unconnected with the first orifice. The injector nozzles may be either simultaneously or sequentially activated for filling the mold cavity, and may be single material or co-injection type nozzles.
REFERENCES:
patent: 2337550 (1943-12-01), Crosby
patent: 5074772 (1991-12-01), Gutjahr
patent: 5183096 (1993-02-01), Cook
patent: 5227179 (1993-07-01), Benenati
patent: 5443378 (1995-08-01), Jaroschek et al.
patent: 5641526 (1997-06-01), Gellert
Bertschi Rene A.
Jenko Edward J.
Husky Injection Molding Systems Ltd.
Mason Suzanne E.
Timm Catherine
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