Method of making an injection molding nozzle having nose portion with heating element encircling the bore
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United States of America Patent
Stats
-
Jul 17, 1990
Issued Date -
N/A
app pub date -
Dec 5, 1989
filing date -
Sep 30, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An integral sprue gated injection molding nozzle and method having a melt bore extending centrally therethrough wherein a circular forward end portion of the electrical heating element encircles the melt bore in the nose portion to provide additional heat adjacent the gate. The method includes locating the circular portion of the heating element in a circumferential space between a hub member and a funnel member and integrally brazing them together in a vacuum furnace to form the nose portion of the nozzle. The nose portion is drilled and machined to provide the desired gate and configuration depending upon the particular application.
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