Patent ID: 8865042

Claim:
A method for producing a cavity mold, the method comprising the steps of: manufacturing each of a metallic surface layer member (MSLM) having an MSLM end face and a cavity main body member (CMBM) having a CMBM end face; making a fitting surface on each of the MSLM and CMBM end faces at least in part by machining the MSLM and CMBM, the MSLM fitting surface having a centering location outer wall; roughening each of the MSLM and CMBM fitting surfaces; forming on the roughened CMBM fitting surface a heat-insulating layer which with the CMBM fitting surface forms a concave inverse of the MSLM fitting surface; joining and integrating the roughened MSLM fitting surface with the CMBM fitting surface via the heat-insulating layer, an overhanging portion of the MSLM centering wall abutting the heat-insulating layer at a terminating edge of the heat-insulating layer facing neither of a cavity mold surface nor the CMBM; and eliminating an unnecessary portion of the joined MSLM to form a concave cavity-shaped metallic surface layer.