Injection molding machines and methods for accounting for changes in material properties during injection molding runs
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United States of America Patent
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May 9, 2017
Grant Date -
Apr 30, 2015
app pub date -
Jul 31, 2014
filing date -
Aug 1, 2013
priority date (Note) -
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Abstract
A method and a machine account for changes in material properties of molten plastic material during an injection run. A change in a control signal is calculated by a controller during the injection molding run. If the change in the control signal indicates a change in material flowability, the controller alters a target injection pressure to ensure that molten plastic material completely fills and packs a mold cavity to prevent part flaws such as short shots or flashing.
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