Abstract
In order to study the effect of casting methods on exclusion of the air in the mold cavity, K metal and Ni-Cr alloy were cast into the mold made of fused silica without air-permeability.The castability of the centrifugal casting were higher than that of the air pressure casting, regardless of the shape of cavity(inlay or crown type), the diameter of the sprue(1mm or 2mm)and the alloy(K metal or Ni-Cr alloy).This result means that the air in the mold can be easily excluded through the sprue in the centrifugal casting.
