Valve actuated injection molding apparatus
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United States of America Patent
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-
Sep 7, 1999
Issued Date -
N/A
app pub date -
Dec 17, 1997
filing date -
Sep 27, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A valve gated injection molding system to facilitate improved melt flow to the gate of the nozzle. The system includes an annular flow insert through which the valve pin passes. The annular flow insert includes an annular groove on its outer surface. The edge of the annular groove is spaced from the wall of the melt channel so that some of the melt can flow longitudinally between the edge of the groove and the wall, while the remainder of the melt flows in the groove. The flow direction initiated by the annular flow insert eliminates flow separation and dead spots about the valve pin. The system also includes an actuator assembly including a sled attached to the valve pin.
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