A vibratory screen feeder is a versatile piece of equipment used in industries like mining, food processing, pharmaceuticals, and recycling to feed, convey, and screen materials simultaneously. Its working principle is based on controlled vibrations that facilitate material movement and separation.
.jpg)
Working Principle of a Vibratory Screen Feeder:
1. Vibration Generation:
– The feeder consists of a trough or pan mounted on springs or rubber mounts.
– An electromagnetic or motor-driven exciter (unbalanced weights or eccentric shafts) generates vibrations.
– The vibration can be linear, circular, or elliptical depending on the design.
2. Material Movement:
– When the feeder vibrates, the material on the pan is subjected to micro-throws (small jumps).
– Due to the vibration angle (typically 30°–45°), the material moves forward in a series of short hops.
– The speed and amplitude of vibration control the feed rate.
3. Screening Function:
– If equipped with a screen deck (perforated or mesh surface), finer particles pass through while larger particles move forward.
– Multiple decks can classify materials into different size fractions.
4. Discharge & Separation:
– Screened material exits through different outlets based on particle size.
– Oversized material continues to the end of the trough for discharge.
.jpg)
Key Components:
– Trough/Deck – Carries and screens material.
– Exciter/Vibrator – Generates vibrations (electromagnetic, unbalanced motor, or eccentric shafts).
– Springs/Mounts – Absorb vibrations and allow movement.
– Control Unit – Adjusts frequency and amplitude for desired feed rate.
Advantages:
✔ Gentle handling of fragile materials
✔ Adjustable feed rate & amplitude
✔ Simultaneous feeding & screening
✔ Low maintenance & energy efficient
Applications:
– Sorting aggregates in mining
– Grading food products
– Removing fines in recycling
– Feeding crushers in quarries
Would you like details on specific types (electromagnetic vs. mechanical)?