Working Principle of Screw (Auger) Filling Machine for Quantitative Powder Filling

A screw filling machine, also called an auger filler, is commonly used to accurately fill powdered or fine granular materials such as milk powder, flour, spices, or chemical powders.

Principle:

• Powder Storage (Hopper)
  The powder is first stored in a hopper above the filling system. A stirring device inside the hopper may rotate continuously to prevent powder from bridging or compacting.
• Auger (Screw) Rotation
  At the bottom of the hopper there is a rotating screw (auger). When the machine operates, a servo motor or stepper motor drives the screw to rotate.
• Volumetric Metering
  As the screw rotates, it conveys a certain volume of powder forward along the screw flights. The amount of powder discharged is proportional to:
  • the number of screw rotations
  • the pitch and diameter of the screw
• Quantitative Control
  The control system precisely controls the rotation speed and number of turns of the screw. Because each rotation moves a fixed volume of powder, the machine can accurately control the filling amount.
• Discharge into Container
  The powder exits through the filling nozzle and falls into the container (such as bottles, bags, or cans). Once the preset number of rotations is completed, the screw stops and the filling cycle ends.

In summary:
The auger filling machine achieves quantitative filling by controlling the rotation of a screw to deliver a fixed volume of powder per revolution, allowing precise and repeatable powder dosing.