Akademik Məlumat İdarəetmə Sistemi
American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED, vol.251, pp.633-638, 2000 (Scopus)
A modified counter-gravity lost foam vacuum process is developed to improve the casting properties and to make possible easy controlling the process parameters. The paper presents the results of the foundry experiments focused on the time and spatial dependent aspects of mold filling of commercial Meritor Break Rotor patterns. A small-scale commercial model was designed and fabricated to conduct the experiments to study the thermo- and hydrodynamics of the mold filling characteristics. A high sensitivity linear output capacitive sensor was used to record the rate of sand flow and compaction in flask while horizontal and/or vertical vibrations were applied. A computer aided thermometric technique was used to study the heat-related processes in the counter-gravity lost foam vacuum casting. A complete pattern of vacuum/pressure fluctuations is obtained during counter-gravity vacuum casting using bi-directional vacuum/pressure transducer. Tolerance analyses were performed for two styrofoam patterns and their cast products produced by the modified casting procedure.