New products, used for feeding material to miscellaneous and clean. The screen body with vibration motor. By choosing reasonable screen mesh and exciting force, and the material can shun speed through the screen, miscellaneous artificial periodic cleaning machine. Feeding on both sides of the door is equipped with a gas spring, reliable sealing, no leakage of dust. Cast using a combination of pulse filter material in general and low noise, the feeding mouth more environmentally friendly and humane environment.