Method for molding plastic materials
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United States of America Patent
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Oct 15, 2019
Grant Date -
Apr 25, 2019
app pub date -
Dec 21, 2018
filing date -
Sep 6, 2012
priority date (Note) -
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Abstract
A method for material handling and mold filling is provided which directs the flow of molten plastic material from an extruder and allocates the molten material to a plurality of nozzles through the use of independently operated, variable valves. The method therefore provides independent streams of molten plastic material having variable temperatures and flow rates or volumes to particular sections or regions of the mold. This independent temperature or flow of molten plastic material facilitates the complete, rapid and accurate filling of the molds, reducing turbulence and other temperature or flow-related imperfections in the finished components. A method of using a multiphase material handling system is also disclosed for expeditious sequential and simultaneous filling and pressing of the mold and extracting the completed component from the system.
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