Mold for hot-runner injection molding machine and method for manufacturing the same
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United States of America Patent
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Mar 18, 2003
Issued Date -
N/A
app pub date -
Sep 14, 2000
filing date -
Feb 10, 1999
priority date (Note) -
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Abstract
A mold for a metal hot-runner injection molding machine includes a movable mold plate, a fixed mold plate having a nozzle for injecting molten metal into said cavity, and a heating device disposed outside the nozzle for heating metal. A gate cut portion is situated in the nozzle between the heating device and the tip. A temperature measurement device is arranged adjacent to the gate cut portion for measuring the temperature of the metal in the gate cut portion. A heating control device is connected to the heating device for controlling a temperature of the nozzle on a basis of the temperature measurement device. A heat insulation device is arranged on the nozzle to cover at least an area where the gate cut portion is formed. By controlling the temperature of the nozzle, metal injection molding without runner can be made.
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