SHAFT PROVIDED WITH A MAGNET FOR AN AIR FLOW RATE ADJUSTMENT VALVE IN AN INTERNAL COMBUSTION ENGINE
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United States of America Patent
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Issued Date -
Dec 4, 2008
app pub date -
Jun 4, 2008
filing date -
Jun 4, 2007
priority date (Note) -
Abandoned
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Abstract
A manufacturing method of a shaft provided with a magnet for an air flow rate adjustment valve in an internal combustion engine; the method presents the steps of: arranging a first mold which negatively reproduces the shape of the shaft and determines the formation of a seat for the magnet; injecting a molten plastic material inside the mold in order to form the shaft provided with the seat for the magnet by injection molding; arranging a second mold which surrounds the seat for the magnet; and injecting a molten magnetic polymer in the second mold for forming the magnet by injection molding.
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