Article by Thayer Scale-Hyer Industries, Inc.: Thayer Scale Sanitary Loss-in-Weight Feeder for Precise and Reliable Ingredient Delivery

Article by Thayer Scale-Hyer Industries, Inc.: Thayer Scale Sanitary Loss-in-Weight Feeder for Precise and Reliable Ingredient Delivery

Thayer Scale-Hyer Industries, Inc. (United States) - Thayer Scale’s equipment has been used to weigh and measure process ingredients for finished products, including tobacco, nuts, confectionary, chocolate, cereal, snack foods, crackers, coffee pet food, dairy, meat and more.

Thayer Scale’s sanitary vibratory Loss-in-Weight LIW feeder is ideally suited to gravimetrically deliver difficult-flowing ingredients such as fine cohesive powders or fragile interlocking particles of irregular shapes at low feed rates with up to a 100:1 turn-down. Thayer Scale’s S52C Loss-in-Weight controller includes a PID controller to precisely monitor and control the rate of flow. In addition, a range of disturbance-monitoring algorithms ensure material delivery is not affected by noise, disturbances, or other “jolts” to the feeder.

The Thayer Scale system will even respond to a dynamic, varying setpoint during refill operation ensuring precise proportional product delivery for master-slave type environments. The sanitary LIW system includes an integral hopper equipped with Thayer Scale’s unique Spiralator flow-aid that provides gentle agitation to delicate materials ensuring consistent feed to the vibratory tray. A slowly rotating, non-agitating, conical wire-spiral within the hopper counteracts the material’s tendency to pack under its own weight by virtue of its “lifting” action throughout the stored material. The resulting reduction in consolidation pressures throughout the material mass assures that the stored material will not develop sufficient strength to form stable arches that can cause erratic flow or complete flow stoppage.

The tray features a customizable bias-cut to provide uniform flow to a master ingredient stream being conveyed below the tray. The combination of this unique material conditioning system and a vibrating pan feeder assures that the material will be handled reliably and gently throughout the entire feeding range. The hopper and feeder are suspended on a fully mass-counterbalanced stainless-steel weigh system to provide high sensitivity and immunity to noise and non-uniform shop floors. The system includes IP66-rated enclosures to support high-pressure cleaning processes.

The system can be quickly disassembled without hand tools to optimize sanitation effectiveness to satisfy stringent sanitation requirements.

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