The utility model provides an automatic
alloy casting machine. The automatic
alloy casting machine comprises a conveying frame, a
chain type conveying belt, a flow dividing frame and a flow dividing
barrel. A preheating box is further arranged at the bottom end of the conveying frame, and a lower-layer conveying belt of the
chain type conveying belt penetrates through the preheating box. The top and / or the bottom of the preheating box are / is provided with at least one
flame nozzle used for baking a mold, and the
flame nozzle communicates with an external
fuel gas source. The air suction end of the
air pump communicates with the preheating box, the exhaust end of the
air pump extends to the position above the conveying frame through a
waste heat guide
pipe, and a plurality of first air spraying holes with openings facing the upper-layer conveying belt are formed in the outer wall of the
pipe section located above the conveying frame. According to the
casting machine, before casting, a mold is preheated through the
fuel gas type preheating box arranged at the bottom of the conveying frame, when the mold is overturned to the upper side of the conveying frame along with the
chain type conveying belt, the
waste heat guide
pipe sucks hot air in the preheating box through the
air pump and sprays the hot air to the mold, and secondary preheating of the mold is achieved; therefore, it is effectively guaranteed that the mold is kept at the proper temperature when reaching the casting position.