Feeders, commonly referred to as feeding machines, utilize eccentric blocks in vibrators to create forced, continuous circular or nearly circular motion in parts like the sieve box and vibrator. Materials are continuously tossed on an inclined sieve surface, evenly feeding into the receiving port. As the base plate moves forward with the material, the hopper fills the space within the machine. When the base plate moves backward, the material on it cannot return and is discharged, achieving feeding. Adjusting the amplitude, frequency of the base plate's movement, and the height of the discharge gate can regulate the feeding rate. The feeding rate is typically within 40 tons per hour. These feeders are suitable for medium to small particle size materials, primarily in the form of trough and pendulum types. Trough feeders have a flat base that moves reciprocally during operation. Pendulum feeders have an arched base that swings as the machine operates. Feeders consist of rotatable disks, guide tubes, and scraper blades. Materials in the hopper accumulate on a disk lined with wear-resistant plates through the guide tube, and the disk's rotation, along with the scraper blades, feeds the material. Adjusting the scraper blade position or the guide tube's height can alter the feeding rate. The disk diameter is usually below 3 meters, and the speed does not exceed 10 rotations per minute. Disk feeders operate smoothly and are reliable, easy to adjust feeding rates, energy-efficient, but are heavier in structure, suitable for less sticky powdery materials. Some feeders consist of a housing and an impeller. The inlet and outlet ports at the top and bottom of the housing connect to the hopper and receiving equipment. As the impeller rotates around a horizontal axis, materials fall into the compartments between the blades, are discharged into the receiving equipment after a half rotation. The pressure equalizing pipe allows the compartments to release high pressure before entering the material area to prevent feeding issues. Adjusting the impeller's speed can regulate the feeding rate. The impeller diameter is typically below 500 millimeters, and the speed does not exceed 45 rotations per minute. This type of feeder has a simple structure, small dimensions, light weight, and good sealing during feeding, making it suitable for small particle and powdered materials.