A vibro screen is a mechanical screening machine used to separate materials. It works on the principle of vibration and gravity. Here's how it typically operates:
- • Material Feeding:- The material to be screened is fed onto the screen deck or mesh surface. This can be done manually or using a conveyor belt or other feeding mechanism.
- • Vibration Generation:- The vibro screen is equipped with one or more vibratory motors or eccentric shafts that generate vibration. These motors or shafts are mounted on the screen box and are usually positioned at an angle to the screening surface. When the motors or shafts rotate, they cause the entire screen box to vibrate in a circular motion or sometimes in an elliptical motion.
- • Screening Surface:- The material on the screen deck is subjected to the vibrating motion. This vibration causes the material to move across the screen surface and helps to separate particles based on size. Smaller particles tend to pass through the screen mesh, while larger particles are retained on the surface.
- • Mesh Size and Deck Configuration:- The size of the mesh or screen openings determines the size of particles that can pass through. The vibro screen may have multiple decks with different mesh sizes to allow for the separation of different particle sizes in one operation.
- • Screening Efficiency:- The efficiency of the screening process depends on various factors such as vibration amplitude, frequency, angle of inclination, and the characteristics of the material being screened. Adjusting these parameters can optimize the screening process for different materials and desired outcomes.
- • Discharge of Material:- The separated materials may be discharged from the vibro screen through different outlets or chutes, depending on their size fractions.
Overall, a vibro screen works by using vibration to separate particles based on size, making it a versatile and widely used equipment in industries such as mining, agriculture, pharmaceuticals, food processing, and recycling.