Curvilinear valve pin controller for injection molding
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United States of America Patent
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N/A
Issued Date -
Jul 4, 2002
app pub date -
Dec 3, 2001
filing date -
Sep 21, 1999
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An apparatus for controlling the rate of flow of fluid material through a flow channel having an exit aperture leading to a mold cavity, the apparatus comprising: a pin having an axis slidably mounted in a housing containing the channel for back and forth axial movement of the pin through the channel; the pin having a bulbous protrusion along its axis, the bulbous protrusion having a smooth curvilinear surface extending between an upstream end and downstream end of the bulbous protrusion and a maximum diameter circumferential surface intermediate the upstream and downstream ends of the bulbous protrusion; the channel having an interior surface area portion which is complementary to the maximum diameter circumferential surface of the bulbous protrusion of the pin; the pin being slidable to a position within the channel such that the maximum diameter circumferential surface of the bulbous protrusion mates with the complementary interior surface portion of the channel.
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