Composite gear blank and method for manufacturing the same
A method of manufacturing a composite gear blank, comprises placing a rigid centerpiece (2) in a mold (10, 12, 28), adding a liquid reactive mixture or a plastic melt (M) until filling up the mold around the centerpiece, applying pressure to the filled up mold and allowing polymerization of the reactive mixture or solidification of the plastic melt so as to form a plastic outer part surrounding the centerpiece. The composite gear blanks thus made have improved values of normal and shear adhesion strength both at room temperature and at elevated temperatures of up to 120°C and are particularly suited for making worm gear parts of automotive electronic power steering systems.
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Published patent application
Disclosure date: 10-02-2007
Publication date: 09-22-2010
Applicant: QUADRANT EPP AG, CH
Inventor: PARISOTTO DAVIDE, IT
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