Injection mold having a valve gate system
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United States of America Patent
Stats
-
Feb 25, 1992
Grant Date -
N/A
app pub date -
Oct 16, 1990
filing date -
Oct 18, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An injection mold has a valve gate system in which a valve pin is moved through a runner into and away from a gate to open and close the gate. The valve pin is inserted into the gate to close it after each injection stroke and the end face of the valve pin defines a part of the surface of an injection-molded article when the valve pin is in the gate. The end face of the valve pin is provided with a designed irregularity.
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