Abstract: The present invention relates to an aluminum base die casting alloy having substantially improved mechanical properties, and a method for making die cast products from the alloy. More particularly the improved aluminum based alloy comprises 2.5-4.0% by weight magnesium, 0.2-0.6% by weight manganese, 0.25-0.6% by weight iron, 0.2-0.45% by weight silicon, less than 0.003% by weight beryllium with the remainder being aluminum.
Type:
Grant
Filed:
February 16, 1995
Date of Patent:
November 12, 1996
Assignee:
Gibbs Die Casting Aluminum Corporation
Inventors:
James M. Evans, Richard J. Hagan, William C. Routh, Roland N. Gibbs
Abstract: An improved squeeze casting process is utilized to produce metal castings having superior mechanical properties. The process is particularly adapted for use in a vertical casting machine and is characterized by vacuum ladling, vacuum evacuated mold cavities, low metal temperatures, small metal feed gates and high gate velocities, application of high metal pressure on the metal filled cavity through the feed gate, and short processing times. When applied to aluminum alloy casting the squeeze casting process produces metal castings that can be heat treated at high temperatures to improve their mechanical characteristics. The process also allows for production of metal castings having complex internal cavities. The process relies upon the use of complex core pieces demonstrating superior positional and dimensional stability.
Type:
Grant
Filed:
July 27, 1992
Date of Patent:
November 23, 1993
Assignee:
Gibbs Die Casting Aluminum Corporation
Inventors:
Paul E. Drury, James M. Evans, Stephen W. Buckman, Roland N. Gibbs
Abstract: An improved squeeze casting process is utilized to produce metal castings having superior mechanical properties. The process is particularly adapted for use in a vertical casting machine and is characterized by vacuum ladling, vacuum evacuated mold cavities, low metal temperatures, small metal feed gates and high gate velocities, application of high metal pressure on the metal filled cavity through the feed gate, and short processing times. When applied to aluminum alloy casting the squeeze casting process produces metal castings that can be heat treated at high temperatures to improve their mechanical characteristics.
Type:
Grant
Filed:
September 23, 1991
Date of Patent:
May 18, 1993
Assignee:
Gibbs Die Casting Aluminum Corporation
Inventors:
Paul E. Drury, James M. Evans, Stephen W. Buckman, Roland N. Gibbs