Abstract: A wax pattern forming die to form a wax pattern is first fabricated, and a molten wax is poured into a cavity in the wax pattern forming die to fabricate the wax pattern. Subsequently, the wax pattern is bonded to a casting sprue pattern made of the wax and fabricated separately from the wax pattern to fabricate an integrated pattern, a surface of the integrated pattern is coated with ceramics, sintering is effected, then the integrated pattern is molten and effused to fabricate a mold to cast a casting with a casting sprue. Further, a molten metal is poured into the mold and cured, then the mold is crushed to take out the casting with the casting sprue, and the casting sprue is cut off from the casting with a casting sprue to fabricate a casting.

Abstract: A wax pattern forming die to form a wax pattern is first fabricated, and a molten wax is poured into a cavity in the wax pattern forming die to fabricate the wax pattern. Subsequently, the wax pattern is bonded to a casting sprue pattern made of the wax and fabricated separately from the wax pattern to fabricate an integrated pattern, a surface of the integrated pattern is coated with ceramics, sintering is effected, then the integrated pattern is molten and effused to fabricate a mold to cast a casting with a casting sprue. Further, a molten metal is poured into the mold and cured, then the mold is crushed to take out the casting with the casting sprue, and the casting sprue is cut off from the casting with a casting sprue to fabricate a casting.