The eccentric vibrator high-speed rotates by the motor through V-belts mobile concrete batching mixing plant ready mixed concrete batching plant,the rotating eccentric block produces large centrifugal force to bring sieve boxes circle moving with certain amplitude. Under the impulse of the sieve box electric concrete mixers for sale, the materials on the leaning screens produce a continuous throwing motion; In the contacting process of the materials and screen surface, particles smaller than sieve pass through the screen and classification is realized.