Abstract
In this research work comparison has been made for dimensional accuracy of hip joint prepared by investment castings process using conventional wax and acrylonitrile butadiene styrene (ABS) as pattern material. Two controllable process variables namely: numbers of slurry layers and type of pattern material have been considered for comparison. An approach to model dimensional accuracy of hip joint has been proposed and applied. International tolerance (IT) grade of cast components was tested and found acceptable as per ISO standard UNI EN 20286-I (1995) and further at proposed parametric settings, process has been found to be statistically controlled.
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