Injection molding insulated valve member
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United States of America Patent
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-
Mar 26, 1991
Grant Date -
N/A
app pub date -
Nov 2, 1989
filing date -
Nov 2, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An injection molding steel valve member in which a central cooling shaft is surrounded by a series of concentric insulation chambers. Cooling water is pumped through the cooling chamber to remove heat from the forward end of the valve member so the adjacent melt in the cavity will solidify more quickly. The insulation chambers reduce lateral heat loss to minimize the problem of solidification of melt around the outer cylindrical surface of the valve member.
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Cited Art Landscape
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