Abstract
The deformation of the EPS pattern in the evaporative pattern casting process using the steel shot as a mold was investigated experimentally. The strain of the plate EPS pattern in the packing process was measured by a strain gauge bonded to the EPS pattern. For uncoated EPS patterns, when the steel shot was packed, the strain of the EPS pattern was slightly greater than when silica sand was packed. By coating with suitable thickness, the strain of the EPS pattern decreased considerably and the effect of the packing material on the strain was not significant.
