Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
July 8, 2008
Patent Application Number
11354950
Date Filed
February 16, 2006
Patent Primary Examiner
Patent abstract
When a molding machine nozzle is separated from a nozzle touch surface of a hot runner sprue, application of external pressure on resin in a resin supply passage is stopped. At this time, back pressure of resin in the resin supply passage that is received by a seal exceeds atmospheric pressure, and thus the seal is moved to seal an opening of the resin supply passage from the inside of the resin supply passage. As a result, leakage of resin from the hot runner sprue is inhibited, and mixing of air in the resin in a runner is also inhibited.
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