Blanking device for exhausting and feeding

The invention relates to a blanking device for exhausting and feeding, which is arranged on the top of a spiral drum and comprises a feeding cylinder and an exhausting feeding drum, wherein the feeding cylinder and the exhausting feeding cylinder are both arranged on the top of the spiral drum; a feeding input port is arranged on the top of the feeding cylinder while a feeding output port is arranged on the bottom; an exhaust port is arranged on the top of the exhausting feeding cylinder while an air inlet is arranged on the bottom; and the feeding output port of the feeding cylinder is communicated with the air inlet of the exhausting feeding cylinder. Compared with the prior art, the blanking device for exhausting and feeding has the advantages that the structure is simple, the practicability is higher, the gas in the mixed material can be efficiently exhausted, the phenomenon of returning materials is reduced, the machine is conveniently washed when the device is used for feeding resin, and the washing ope