Electronic Bagging Machine

Electronic Bagging Machine Model 50-BM-01 is a Loadcell based Automatic Weighing Machine and is designed for automatic weighing & filling of free-flowing materials in to open-mouthed gunny bags or HDPE bags from an overhead storage hopper.
The machine is of net filling type where in the material is pre-weighed and then discharged into a bag that has been clamped to a Bag Chute. The weight sensing is by Strain gauge based loadcells and measurement and control is through a micro controller based Electronic Control unit (ECU).
A hopper, with a pneumatically operated discharge gate, suspended from two shear beam type Loadcells is used to weigh the material fed in to it. A pneumatically operated two position flap gate and the ECU regulates the feeding of the material to the weigh hopper. The flap gate operating mechanism has provision for coarse and fine feed of material. The bag clamp is pneumatically operated and is effected by the operation of a lever switch after positioning the bag on to the chute.
The bagging process commences on clamping the bag to the chute. A high resolution Analog to Digital converter employed in the ECU measures and displays the weight digitally. The micro controller on receiving a start command operates the feeder flap to control the feed rate to the hopper in two stages namely 'coarse' and 'fine' feed cycles. The ECU compares the weight detected by the loadcell against a preset value and decides the duration of coarse and fine feed cycles. The feeding is stopped on achieving the preset weight. In-flight correction is provided to achieve accurate weighing. The ECU then discharges the material to the bag, after confirming that the bag is clamped on to the bag chute. The correctly filled bags are released automatically. In case of over or under loading of a bag, an alarm is set and the operator has to release the bag manually.
The machine has a robust construction to withstand harsh industrial conditions and is designed such that there are no removable parts, which affects the weighment. This ensures accurate, reliable and consistent operation.