Lost foam valve mold capable of automatically filling materials

The utility model relates to the technical field of evanescent molds, and discloses an automatic material filling evanescent mold valve mold which comprises a lower mold plate, an upper mold plate is arranged above the lower mold plate, a top plate is arranged above the upper mold plate, four limiting rods are fixedly installed at the top of the lower mold plate, and each limiting rod penetrates through the upper mold plate to be fixedly connected with the bottom face of the top plate. According to the utility model, a foam plastic raw material entering the Roots blower further enters the hose, then enters the feeding pipe through the hose, and finally enters a sealed cavity formed by the upper template and the lower template through the feeding pipe, so that the foam plastic raw material enters the Roots blower through the feeding pipe; and when the foam plastic raw materials do not need to be filled, the control device is controlled to close the Roots blower, so that manual repeated material filling is avoi