Apparatus and method for inductive heating a workpiece using an interposed thermal insulating layer
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United States of America Patent
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Issued Date -
Jun 12, 2008
app pub date -
Nov 15, 2006
filing date -
Nov 15, 2006
priority date (Note) -
Abandoned
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Abstract
Disclosed herein is an apparatus and method with inductive heating of an electrically conductive workpiece such as a barrel used in molding or extrusion, having a layer of thermal insulation interposed between the induction windings and the workpiece, and using alternating current (AC) at an elevated frequency. Further, variable pitch induction windings may be used to generate a non-uniform and calculated heat input profile, such as to compliment the configuration of a screw for transporting material through the barrel.
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