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Study of full-mold casting process for Al–Si hipoeuthetic alloys
Journal of Materials Processing Technology 179 (2006) 196–201
Study of full-mold casting process for Al–Si hipoeuthetic alloys
Francisco Germano Martins a,∗, Carlos Augusto Silva de Oliveirab,1
a Sociedade Educacional de Santa Catarina (SOCIESC), R. Albano Schmidt 3333, Joinville/SC 89227-700, Brazil
b Universidade Federal de Santa Catarina, Departamento de Engenharia Mecˆanica, Campus Universit´ario,
Trindade, LabConf, Florian´opolis/SC Brazil
Abstract
The full-mold casting process uses polystyrene foam as the pattern. The pattern is encased in a one-piece sand mold, with no bonding material.
As the metal is poured, the foam vaporizes, and the metal takes its place. The gases from the foam flee through the sand. The advantage of the
process is that complex shaped castings can be made without any draft or flash. Moreover the process has less energy consumption and less waste
residues than other casting processes. The present study evaluated channel dimensioning, refractory coatings and casting sand, in order to adapt
the system to a medium size foundry and, at the same time, optimize energy consumption and environmental damage. The results are encouraging.
The used coating had shown good erosion resistance, and good permeability for gas escape. The surface finishing quality was satisfactory for the
selected sand. Reusing the sand had adequate results. It seems that adjustments for green sand conventional systems conversion to full-mold system
are viable.
© 2006 Elsevier B.V. All rights reserved.
Keywords: Casting; Full-mold process; Aluminum–silicon alloys
1. Introduction shape parts. The patterns are cheap and easy to manufacture,
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