Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Forming plural articles
Reexamination Certificate
2005-01-04
2005-01-04
Heitbrink, Jill L. (Department: 1732)
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Forming plural articles
C264S328800, C425S130000, C425S145000, C425S572000, C425S573000
Reexamination Certificate
active
06838034
ABSTRACT:
The present invention (FIGS.1, 1, 2, 3, 4, 5, 6, 7, 8 9 10, 11, 12, 13, 14, 15, 16, 17, 18) provides an injection molding method and apparatus. A hot manifold is provided having a plurality of independently controlled valve gates. A controller is operably connected to each of the valve gates enabling independent opening and closing thereof. A mold has at least two cavities, a larger cavity and a relatively smaller cavity. The larger cavity has at least two inlets each communicating with the valve gates of the hot manifold. The smaller cavity has at least one inlet communicating with respective valve gate of the hot manifold. The larger cavity is filled with a first plasticized material by sequentially opening and closing the valve gates communicating with the large cavity. The larger cavity is packed out. Simultaneously with the packing out step, the smaller cavity is filled and packed out with a second plasticized material by opening and closing the at least one respective valve gate. A large and a small part may be molded in the same time as required for molding solely the large part.
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Korte Keith
Parker Todd C.
Smith Michael B.
York Russell R.
Conix Corporation
Heitbrink Jill L.
Polster Lieder Woodruff & Lucchesi
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