Auger fillers measure and discharge the required volume of a product (usually a powder or free-flowing solids) into its packaging. The product is stored in a hopper and, during each cycle, the auger (which looks like a large screw) is rotated for a predetermined number of revolutions, discharging the requisite product into an empty valve bag. Filling, weighing and cut-off are all fully automated for the ultimate in operator convenience.
The mouth of a valve bag is much smaller than that of an open mouth bag. This enables better control of the flow of the powdered product into the bag, reducing the dust generated. While valve bags can be self-closing, this does not result in a hermetic seal. We recommend that bags used in the chemical and food industry are ultrasonically sealed after filling.
To compensate for changes in the bulk density of the product, auger fillers are often used in conjunction with weighing instruments, such as a checkweigher.