INJECTION MOLDING METHOD WITH INFRARED PREHEAT
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United States of America Patent
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Issued Date -
Jan 22, 2015
app pub date -
Jul 17, 2013
filing date -
Jul 17, 2013
priority date (Note) -
Abandoned
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Abstract
A plastic injection molding system includes a mold having an interior surface and an exterior surface. The interior surface defines a mold cavity, which is configured in a shape of a part to be formed. A source of plastic, having a known heat deflection temperature, is injected into the mold cavity. At least one infrared heat source is disposed adjacent the mold. The at least one heat source is moveable between a first position disposed away from the interior surface of the mold and a second position where the at least one heat source is in communication with the mold cavity surface. A controller is in communication with the at least one heat source and is configured to heat the mold cavity surface to a predetermined temperature below the heat deflection temperature of the plastic resin. At least one temperature sensor is in communication with the interior surface of the mold and in communication with the controller to move the at least one heat source to the second position when the interior surface of the mold reaches the predetermined temperature.
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