Bulk Bag Weighing

Intermediate Bulk Container

If your manufacturing process uses Intermediate Bulk Containers (IBC), ensuring the total weight of what may go in or what comes out of them is critical in today’s manufacturing environment.  Government regulations and traceability are paramount. High resolution and fast update rates are needed to ensure precise cut-offs in the filling or dispensing processes to insure accurate weighments.  

IBCs are typically used for loss-of-weight application.  IBCs are suspended by load cells to weigh the material dispensed into receiving containers. Hardy 3010 Filler/Dispenser can either standalone or connect to host computers (PC), Programmable Logic Controllers (PLCs), Programmable Automation Controllers (PAC) or Distributed Control Systems (DCS), to open and close the discharge gates while weighing the loss of ingredients.
Feeding Intermediate Bulk Container
Empty IBCs are often exchanged before the desired weight is met. A Hardy dispenser/filler retains the amount dispensed from the first IBC in memory so that it knows how much material is required from the second IBC to complete the desired weight. Without this feature, material is wasted by not completely emptying the IBC or by over filling when switching.

Instrumentation and Control

Hardy filling and dispensing systems includes weight or rate controllers connected to load points (load cells and mounting hardware) in either a standalone system or connected to PCs, PLCs, PACs or DCSs. Total net weight can be tracked with Hardy's totalizer feature, keeping track of the total amount of the material that has been filled or dispensed. In addition to filling and dispensing, Hardy controllers can also be used to control or monitor the rate of flow of material.

Accuracy
High resolution and fast update rates in Hardy's controllers allow for precise cut-offs.  The scale must be capable of updating faster than the rate that material is entering or leaving it.

Hardy controllers with their programmable preacts have the ability to account for the in-flight material that is not yet on the scale when the valve or gate is closed. A preact can stop the process earlier in order to compensate for the material in-flight, so it doesn't over shoot the desired weight. Book an One on One Application Consultation With a Hardy Weighing Specialist Today!

If the final weight falls under the desired amount, Hardy's "jog" feature slightly opens the gate or valve for a selectable period of time to bring the weight into tolerance. The preact can be either user-selectable (Manual) or user selectable and self-adjusting (Reactive).

Speed
Accuracy of dispensing is increased even more using the dual speed capabilities of Hardy's controllers. A fast or bulk speed is used for the majority of the process cycle in which valves or gates are wide open to allow maximum flow coupled with a slow or dribble speed at the end of a cycle, where the valves or gates are nearly closed. The slow or dribble speed allows for a higher accuracy of hitting the final desired weight without under or over shooting it. A reactive algorithm analyzes and automatically adjusts the fast cutoff to increase system throughput.

For more information, check out our Case Studies on inventory management and our Application Notes on loss-in-weight or gain-in-weight measurement systems. 

Products for intermediate bulk container weighing:

HI 4050 Weight Controller

HI 3030 Weight Controller

HI 3010 Dispenser Filler

HI 2151/30WC

HI 6300 series of weight processors

HI 2110WI Weight Indicator

HI 1746-WS PLC Weight Processor

HI 1756-WS and 2WS PLC Weight Module

HI 1769-WS and 2WS PLC Weight Module

HI 2204LT Weight Transmitter

HI 200DWDM Device Net Weight Transmitter


HI 2080 Easy 8 Weight Module