Extrusion molding system and method
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United States of America Patent
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Mar 17, 2009
Grant Date -
Dec 9, 2004
app pub date -
Mar 26, 2004
filing date -
Mar 28, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An extrusion molding system includes a die having a first opening with a unvariable shape and a second opening with a variable shape, an extruder which feeds resin to the die, and a gear pump arranged between the die and the extruder. An ECU conducts a first sequence control to change the shape of the second opening and a second sequence control to change the rotation speed of the first gear pump in synchronism with a change in the shape of the second opening.
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