Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Forming plural articles
Patent
1989-05-10
1990-10-23
Heitbrink, Jill L.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Forming plural articles
2643287, 2643288, 26432815, B29C 4522
Patent
active
049650289
ABSTRACT:
A method and apparatus for thermoplastic multigated single cavity or multicavity injection molding. A plasticated melt flows along a melt distributing passageway (3), (15), (8), and enters through a plurality of gates (35) associated with and enters through a plurality of gates (35) associated with one or more mold cavity (18). Melt temperature is maintained by means of manifold heaters (26), bushing heater band (20) and, most preferably, heated probe (16). A unique melt conditioning element placed just upstream of gate (35) forces the melt to enter a plurality of inlet melt channels (51) and flow through a region of constricted cross section and/or angular change of flow direction formed by the geometric relationship of a bushing wall (13) to said element. The result is to provide, by design, various degrees of melt heating, melt filtration, and melt homogenization.
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Galic George J.
Maus Steven M.
Galic Maus Ventures
Heitbrink Jill L.
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