US Patent 7704433 Control system for dynamic feed coinjection process

Patent 7704433 was granted and assigned to Husky Injection Molding Systems on April, 2010 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Husky Injection Molding Systems

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

77044330

Patent Inventor Names

Roberto D. Sicilia0

Date of Patent

April 27, 2010

Patent Application Number

123720960

Date Filed

February 17, 2009

Patent Primary Examiner

‌

Edmund H Lee

Patent abstract

Coinjection molding system control apparatus and method preferably includes flow control structure and/or steps configured to reduce pressure on a second melt, preferably causing a relatively small portion of a first melt to flow from a distal portion of a first melt channel in the coinjection nozzle into a distal end of a second melt channel in the coinjection nozzle. This prevents substantial amounts of the second melt from being dragged into the mold cavity when the next shot of the first melt is injected.