Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Akira Sugawara0
Takayuki Takahashi0
Date of Patent
April 19, 2011
0Patent Application Number
117292210
Date Filed
March 28, 2007
0Patent Primary Examiner
Patent abstract
After a molten metal of aluminum or an aluminum alloy having a temperature, which is higher than the liquidus line temperature of aluminum or the aluminum alloy by 5 to 200° C., is injected into a mold, when the mold is cooled to solidify the molten metal, the molten metal injected into the mold is pressurized at a pressure of 1.0 to 100 kPa from a high-temperature side to a low-temperature side, and the mean cooling rate is set to be 5 to 100° C./minute while the mold is cooled from the liquidus line temperature to 450° C., the temperature gradient formed in the mold being set to be in the range of from 1° C./cm to 50° C./cm.
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