Definition of a Suction Feeder
A suction feeder is an industrial or agricultural material handling machine that utilizes the energy of an air stream to convey flowable materials, facilitating their further utilization in production processes.

Components of a Suction Feeder

Control device

Motor

Sealed hopper

Discharge device

Filter screen

Check valve

Air filter

Working Principle of a Suction Feeder
When the control device activates the vacuum motor, it extracts air from the hopper while simultaneously closing the discharge valve, creating negative pressure inside the hopper. Under this negative pressure, external materials are carried into the hopper through the conveying pipe via the airflow. Once the feeding cycle ends, the vacuum motor stops, and the internal discharge valve is pushed open by the material, allowing it to flow from the hopper into an injection molding machine, extruder, or other equipment.

Introduction to Suction Feeders
Suction feeders are widely used in the raw material conveying processes for equipment such as injection molding machines and extruders. They offer easy installation, simple operation, strong long-distance conveying capabilities, stable production performance, reliable operation, and serve as essential auxiliary devices for achieving fully automated production.

Suction feeders can be categorized into two types: direct suction feeders and split-type suction feeders. Single-unit suction feeders typically employ brush-type motors.