Weigh Batching System Simultaneously Weighs Multiple Ingredients

An automated plantwide weigh batching system engineered by Flexicon Corp. simultaneously weighs up to seven major ingredients received in bulk bags and unlimited minor ingredients received in 50-pound (23 kg) sacks, pails or boxes, and conveys weighed batches to a downstream blender that feeds a bulk bag filler and a paper sack filling machine.

System components supplied by Flexicon include five loss-of-weight Bulk-Out bulk bag dischargers with large surge hoppers and rotary airlock valves; two loss-of-weight Bulk-Out bulk bag dischargers with small surge hoppers and flexible screw conveyors; two loss-of-weight bag dump stations with flexible screw conveyors; a check-weighing hopper; a Twin-Centerpost bulk bag filler; a Pneumati-con dilute-phase pneumatic conveying system including blower, filter receiver and conveying lines; and a programmable controls package.

Each of the large surge hoppers accommodates the entire contents of a bulk bag containing a major ingredient, affording operators sufficient time to load full bags into the frame as material is removed at high rates through a common pneumatic line terminating at the filter receiver.

The smaller surge hoppers on the loss-of-weight Bulk-Out bulk bag dischargers provide sufficient capacity to allow reloading of major ingredients conveyed at lower rates by small diameter flexible screw conveyors. Also conveyed by loss-of-weight flexible screw conveyors are minor ingredients, which are dumped manually at either of two dumping stations equipped with vacuum filtration systems to contain airborne dust. All flexible screw conveyors discharge into a common check-weighing transition hopper mounted on load cells that confirm batch accuracy before feeding the material through a rotary airlock into the aforementioned pneumatic line.

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