Mold roaster

The utility model discloses a mold roaster which is composed of the following components: a first air inlet pipe, a second air inlet pipe, a main pipe, branch pipes and vertical pipes. The branch pipes are crossed with the main pipe in a horizontal plane. The vertical pipes are crossed with the branch pipes in a vertical plane. The main pipe is provided with mold cover flame throwing holes which are aligned with a mold cover. The vertical pipes are respectively provided with a core mold flame throwing hole which is aligned with a core mold and outer mold flame throwing holes which are aligned with an outer mold. In preheating, combustible gas is introduced into the main pipe of the mold roaster through the air inlet pipes. The flame in gas combustion is thrown out through the mold cover flame throwing holes, the core mold flame throwing hole and the outer mold flame throwing holes, thereby respectively heating the mold cover, the core mold and the outer mold of the mold. Thus alloy liquid wastage in mold cast