%0 Journal Article
%T Process Control of Lost Foam Casting using Slurry Viscosity and Dipping Time
%A Majid Karimian
%A A. Ourdjini
%A M.H. Idris
%A T. Chuan
%J Journal of Applied Sciences
%D 2011
%I Asian Network for Scientific Information
%X In the present study an experimental investigation on lost foam casting of Al-Si cast alloy (LM6) has been conducted to control some process variables. The main objectives were to study the effect of different slurry viscosities and dipping times on coating thickness, casting integrity and surface roughness of prepared samples with five different section thicknesses ranging from 3 to 24 mm with foam density of 20 kg m-3. Suggested slurry for this research was Zircon flour plus colloidal silica. The different slurry viscosities and dipping times could cause different fillings at corners and edges in filled corners and sides, there was difference in surface roughness. The obtained results showed that slurry viscosity has a significant influence on the casting integrity as well as surface quality of lost foam casting of LM6 Al-Si alloy. Lower slurry viscosity provides thinner coating and as a result better gas escape, fulfilling and smoother surface. In the current research, slurry viscosity of 20 sec and dipping time of 20 sec provide the best filling the and most smooth surface finish.
%K slurry viscosity
%K Lost foam casting
%K process control
%K dipping time
%U http://docsdrive.com/pdfs/ansinet/jas/2011/3655-3658.pdf