Plastic and nonmetallic article shaping or treating: processes – Forming sound grooves in records
Patent
1997-08-15
1999-05-04
Heitbrink, Jill L.
Plastic and nonmetallic article shaping or treating: processes
Forming sound grooves in records
2643281, 2643289, 425562, 425564, 425566, B29C 4523
Patent
active
059002000
ABSTRACT:
A valve gate injection nozzle includes a valve stem for guiding molten resin to a molding area. The valve stem includes an input area for receiving the molten resin, a central area following the input area for processing the molten resin and an output area following the central area for connection of the nozzle with the molding area. The central area includes a first zone for splitting the molten resin into a plurality of streams, a second zone for mixing and homogenizing the molten resin, and a third zone for combing the plurality of streams and forming recombined molten resin for subsequent direction in a homogenized state to the output area. The nozzle further includes a nozzle body portion for enclosing the valve stem, wherein the nozzle body portion preferably includes means for heating the resin. An injection molding system incorporating this nozzle as well as a method for homogenizing molten resin are also disclosed.
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Heitbrink Jill L.
Husky Injection Molding Systems Ltd.
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