of the var process is the rate of material deposition fig5 is a longitudinal sectional view of a centrifugal casting cc apparatus 500 employing a cc process to form a rotor a crucible 515 and a mold 512 having a substantially helical hypocycloid inner profile formed on an inner surface thereof are disposed within a chamber 517 assembled through coupling by means of a flange 519 a molten material 520 melted in the crucible 515 is led to the tundish 513 by means of a sprue runner 514 the molten material 520 in the tundish 513 is discharged through a number of hole portions 518 formed in the tundish 513 to thereby be deposited on the inner wall surface of the rotating mold 512 the rotation of the mold 512 is driven by mold drive mechanism 508 a tundish reciprocation mechanism 516 causes the tundish 513 to repeat reciprocation the crucible 515 is adapted to melt a metal or an alloy into a liquid material through application of heat thereby yielding the molten material 520 examples of melting processes include resistance heating induction heating arc melting and plasma arc melting melting and casting are performed in for example the atmosphere vacuum or.